US20140373765A1 - Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine - Google Patents
Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine Download PDFInfo
- Publication number
- US20140373765A1 US20140373765A1 US13/927,040 US201313927040A US2014373765A1 US 20140373765 A1 US20140373765 A1 US 20140373765A1 US 201313927040 A US201313927040 A US 201313927040A US 2014373765 A1 US2014373765 A1 US 2014373765A1
- Authority
- US
- United States
- Prior art keywords
- presser
- control module
- actuator
- switch component
- knee lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2205/00—Interface between the operator and the machine
- D05D2205/02—Operator to the machine
- D05D2205/06—Handles
Definitions
- the invention relates to a motor control device for a sewing machine, and more particularly to a knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine.
- FIG. 1 shows a sewing machine 10 including a conventional knee-controlled presser driving device 1 adapted for controlling movement of a presser foot 11 of a presser mechanism.
- the conventional presser driving device 1 includes an attachment seat 12 , a knee lever connector 13 , a knee lever 14 and a cord component 15 .
- the knee lever connector 13 is rotatably disposed on the attachment seat 12 , and includes a connection portion 131 and a driving portion 132 .
- the knee lever 14 is mounted to the knee lever connector 13 and is operable by knee contact to rotate and to drive rotation of the knee lever connector 13 relative to the attachment seat 12 .
- the cord component 15 has two ends connected to the driving portion 132 of the knee lever connector 13 , and the presser mechanism, respectively.
- the driving portion 132 drives the presser mechanism, so as to result in vertical movement of the presser foot 11 through the cord component 15 .
- the conventional knee-controlled presser driving device 1 of the sewing machine 10 has the following drawbacks:
- the movement of the presser foot 11 is driven through the cord component 15 , and the movement precision of the presser foot 11 may be affected by physical property variation of the cord component 15 , such as extension or shrinkage of the cord component 15 that may cause displacement differences between the two ends of the cord component 15 during rotation of the driving portion 132 of the knee lever connector 13 , and that results in adverse effect on movement precision of the presser foot 11 .
- the sewing machine usually has a separate mechanism to move and position the presser foot at a predetermined height for facilitating user's operation.
- U.S. Pat. No. 8,161,897 discloses a sewing machine which uses a knee lever mechanism with a potentiometer to control operation of an electric motor that drives vertical movement of a presser foot.
- this patent does not disclose a mechanism for automatic movement of the presser foot to a predetermined height using the knee lever mechanism thereof.
- an object of the present invention is to provide a motor control device that is adapted for controlling an electric motor that drives movement of a presser mechanism of a sewing machine, and that is operable to dispose a presser foot of the presser mechanism at a predetermined height.
- a motor control device for controlling operation of an electric motor that drives movement of a presser mechanism of a sewing machine.
- the motor control device comprises:
- a knee lever mechanism including:
- control module coupled to the switch component and to be coupled to the electric motor.
- control module determines the switch component to be in an actuated state
- control module is configured to control operation of the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
- Another object of the present invention is to provide a presser driving device for driving movement of a presser mechanism of a sewing machine.
- a presser driving device comprises a knee lever mechanism, a control module coupled to the knee lever mechanism, and an electric motor coupled to the control module and to be coupled to the presser mechanism.
- the knee lever mechanism includes:
- control module determines the switch component to be in an actuated state
- control module is configured to control operation of the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
- Yet another object of the present invention is to provide a sewing machine that comprises:
- a presser mechanism supported by the head and including a presser bar and a presser foot at one end of the presser bar;
- a presser driving device including a knee lever mechanism, a control module coupled to the knee lever mechanism, and an electric motor coupled to the presser mechanism and the control module.
- the knee lever mechanism includes:
- control module determines the switch component to be in an actuated state
- control module is configured to control operation of the electric motor to move the presser bar to dispose the presser foot at a predetermined height relative to the bed.
- FIG. 1 is a schematic diagram showing a connection relationship of a conventional knee-controlled presser driving device and a presser foot in a sewing machine;
- FIG. 2 is a schematic diagram showing a sewing machine that includes a preferred embodiment of the presser driving device according to the present invention
- FIG. 3 is a perspective view showing a rotary axle portion of a variable resistor component of the preferred embodiment at an initial angular position
- FIG. 4 is a side view of the preferred embodiment showing the rotary axle portion of the variable resistor component of the preferred embodiment at the initial angular position;
- FIG. 5 is a perspective view showing the rotary axle portion of the variable resistor component of the preferred embodiment when being rotated
- FIG. 6 is a side view of the preferred embodiment showing an actuator of the preferred embodiment when rotated to a predetermined angular position
- FIG. 7 is a block diagram showing a connection relationship of a control module of the preferred embodiment with other components in the sewing machine.
- a sewing machine is shown to include a bed 100 , a head 110 disposed above the bed 100 , a presser mechanism 200 supported by the head 110 , and a presser driving device including an electric motor 20 (such as a stepper motor) and the preferred embodiment of the motor control device according to this invention.
- the presser mechanism 200 includes a presser bar 21 and a presser foot 2 at one end of the presser bar 21 .
- the motor control device is adapted for controlling operation of the electric motor 20 that drives movement of the presser mechanism 200 of the sewing machine, and includes a knee lever mechanism 3 , a limiting module 4 and a control module 5 (see FIG. 7 ).
- the knee lever mechanism 3 includes an attachment seat 31 , a knee lever 32 , an actuator 33 , a variable resistor component 34 disposed on the attachment seat 31 , a switch component 35 disposed on the attachment seat 31 , and a first spring 36 .
- the knee lever 32 is mounted for rotation relative to the bed 100 and is operated by knee contact to rotate.
- the actuator 33 is mounted rotatably to the attachment seat 31 and has a lever-connecting portion 331 connected to the knee lever 32 for co-rotation with the knee lever 32 relative to the attachment seat 31 , and a driving portion 332 opposite to the lever-connecting portion 331 .
- the actuator 33 is disposed between the switch component 35 and the variable resistor component 34 with the lever-connecting portion 331 disposed adjacent to the switch component 35 and the driving portion 332 disposed adjacent to the variable resistor component 34 .
- the actuator 33 is formed with a protrusion 333 disposed to actuate the switch component 35 when the actuator 33 is rotated to a predetermined angular position.
- the variable resistor component 34 has a rotary axle portion 341 , a forced portion 342 that extends from the rotary axle portion 341 and that abuts against the driving portion 332 of the actuator 33 , and a protrusion part 343 extending from the rotary axle portion 341 in a direction opposite to the forced portion 342 , and has a resistance varying with rotation of the rotary axle portion 341 .
- the forced portion 342 is forced by rotation of the actuator 33 so as to rotate the rotary axle portion 341 and vary the resistance of the variable resistor component 34 , and further rotation of the actuator 33 to the predetermined angular position results in the protrusion 333 of the actuator 33 actuating the switch component 35 , as shown in FIG. 6 .
- the first spring 36 has opposite ends that are connected to the attachment seat 31 and the actuator 33 , respectively, so as to provide a resilient force to stabilize rotation of the actuator 33 .
- the limiting module 4 includes a base seat 41 , a limiting member 42 , and a second spring 43 .
- the base seat 41 is disposed on the attachment seat 31 and adjacent to the rotary axle portion 341 .
- the limiting member 42 is disposed on the base seat 41 and has an end portion disposed to abut against an edge of the rotary axle portion 341 of the variable resistor component 34 when the rotary axle portion 341 is at an initial angular position relative to the base seat 41 , as shown in FIGS. 3 and 4 .
- the second spring 43 has opposite ends connected to the protrusion part 343 and the base seat 41 , respectively.
- the second spring 43 provides a resilient force to bias the rotary axle portion 341 to the initial angular position.
- control module 5 is electrically coupled to the variable resistor component 34 , the switch component 35 and the electric motor 20 .
- the control module 5 is a programmable module that is configured with a built-in program 51 to perform conversion of a resistance variation of the variable resistor component 34 into a displacement value of the presser foot 2 .
- a relationship between resistance increment or decrement of the variable resistor component 34 and the movement direction of the presser foot 2 , and a relationship between the resistance variation of the variable resistor component 34 and the displacement value of the presser foot 2 may be user-defined through the built-in program 51 .
- control module 5 determines the switch component 35 to be in a non-actuated state
- the control module 5 is configured to control operation of the electric motor 20 to move the presser mechanism 200 according to the converted displacement value of the presser foot 2 .
- the control module 5 determines the switch component 35 to be in an actuated state
- the control module 5 is configured to control operation of the electric motor 20 to move the presser mechanism 200 to dispose the presser foot 2 of the presser mechanism 200 at a predetermined height relative to the bed 100 of the sewing machine.
- the motor control device of this invention uses the knee lever 32 to vary resistance of the variable resistor component 34 , so as to control the electric motor 20 to drive movement of the presser foot 2 .
- the presser foot 2 may be disposed at the predetermined height using the knee lever 32 .
Abstract
A motor control device is used to control an electric motor that drives a presser mechanism of a sewing machine and includes a knee lever mechanism and a control module. The knee lever mechanism includes a switch component, an actuator rotatable to actuate the switch component at a predetermined angular position, and a rotatable knee lever operable by knee contact to rotate and to drive rotation of the actuator. When the control module determines that the switch component is actuated, the control module controls the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
Description
- 1. Field of the Invention
- The invention relates to a motor control device for a sewing machine, and more particularly to a knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine.
- 2. Description of the Related Art
-
FIG. 1 shows asewing machine 10 including a conventional knee-controlledpresser driving device 1 adapted for controlling movement of apresser foot 11 of a presser mechanism. The conventionalpresser driving device 1 includes anattachment seat 12, aknee lever connector 13, aknee lever 14 and acord component 15. Theknee lever connector 13 is rotatably disposed on theattachment seat 12, and includes aconnection portion 131 and adriving portion 132. Theknee lever 14 is mounted to theknee lever connector 13 and is operable by knee contact to rotate and to drive rotation of theknee lever connector 13 relative to theattachment seat 12. Thecord component 15 has two ends connected to thedriving portion 132 of theknee lever connector 13, and the presser mechanism, respectively. When theknee lever 14 is rotated and drives rotation of theknee lever connector 13, thedriving portion 132 in turn drives the presser mechanism, so as to result in vertical movement of thepresser foot 11 through thecord component 15. - The conventional knee-controlled
presser driving device 1 of thesewing machine 10 has the following drawbacks: - 1. The movement of the
presser foot 11 is driven through thecord component 15, and the movement precision of thepresser foot 11 may be affected by physical property variation of thecord component 15, such as extension or shrinkage of thecord component 15 that may cause displacement differences between the two ends of thecord component 15 during rotation of thedriving portion 132 of theknee lever connector 13, and that results in adverse effect on movement precision of thepresser foot 11. - 2. Installation and routing of the
rope component 15 must be carefully considered, so as to ensure that thedriving portion 132 of theknee lever connector 13 can smoothly drive thecord component 15, and thereby ensure proper movement of thepresser foot 11. - In view of the above drawbacks, it has been proposed heretofore to use an electric motor for driving movement of the
presser foot 11 of the presser mechanism instead of thecord component 15. In addition, the sewing machine usually has a separate mechanism to move and position the presser foot at a predetermined height for facilitating user's operation. - U.S. Pat. No. 8,161,897 discloses a sewing machine which uses a knee lever mechanism with a potentiometer to control operation of an electric motor that drives vertical movement of a presser foot. However, this patent does not disclose a mechanism for automatic movement of the presser foot to a predetermined height using the knee lever mechanism thereof.
- Therefore, an object of the present invention is to provide a motor control device that is adapted for controlling an electric motor that drives movement of a presser mechanism of a sewing machine, and that is operable to dispose a presser foot of the presser mechanism at a predetermined height.
- According to one aspect of the present invention, there is provided a motor control device for controlling operation of an electric motor that drives movement of a presser mechanism of a sewing machine. The motor control device comprises:
- a knee lever mechanism including:
-
- a switch component,
- an actuator rotatable to actuate the switch component when rotated to a predetermined angular position, and
- a rotatable knee lever operable by knee contact to rotate and to drive rotation of the actuator; and
- a control module coupled to the switch component and to be coupled to the electric motor.
- When the control module determines the switch component to be in an actuated state, the control module is configured to control operation of the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
- Another object of the present invention is to provide a presser driving device for driving movement of a presser mechanism of a sewing machine.
- According to another aspect of the present invention, a presser driving device comprises a knee lever mechanism, a control module coupled to the knee lever mechanism, and an electric motor coupled to the control module and to be coupled to the presser mechanism.
- The knee lever mechanism includes:
-
- a switch component coupled to the control module,
- an actuator rotatable to actuate the switch component when rotated to a predetermined angular position, and
- a rotatable knee lever operable by knee contact to rotate and to drive rotation of the actuator.
- When the control module determines the switch component to be in an actuated state, the control module is configured to control operation of the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
- Yet another object of the present invention is to provide a sewing machine that comprises:
- a bed;
- a head disposed above the bed;
- a presser mechanism supported by the head and including a presser bar and a presser foot at one end of the presser bar; and
- a presser driving device including a knee lever mechanism, a control module coupled to the knee lever mechanism, and an electric motor coupled to the presser mechanism and the control module.
- The knee lever mechanism includes:
-
- a switch component coupled to the control module,
- an actuator rotatable to actuate the switch component when rotated to a predetermined angular position, and
- a knee lever mounted for rotation relative to the bed and operated by knee contact to rotate and to drive rotation of the actuator.
- When the control module determines the switch component to be in an actuated state, the control module is configured to control operation of the electric motor to move the presser bar to dispose the presser foot at a predetermined height relative to the bed.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:
-
FIG. 1 is a schematic diagram showing a connection relationship of a conventional knee-controlled presser driving device and a presser foot in a sewing machine; -
FIG. 2 is a schematic diagram showing a sewing machine that includes a preferred embodiment of the presser driving device according to the present invention; -
FIG. 3 is a perspective view showing a rotary axle portion of a variable resistor component of the preferred embodiment at an initial angular position; -
FIG. 4 is a side view of the preferred embodiment showing the rotary axle portion of the variable resistor component of the preferred embodiment at the initial angular position; -
FIG. 5 is a perspective view showing the rotary axle portion of the variable resistor component of the preferred embodiment when being rotated; -
FIG. 6 is a side view of the preferred embodiment showing an actuator of the preferred embodiment when rotated to a predetermined angular position; and -
FIG. 7 is a block diagram showing a connection relationship of a control module of the preferred embodiment with other components in the sewing machine. - Referring to
FIGS. 2 , a sewing machine is shown to include abed 100, ahead 110 disposed above thebed 100, apresser mechanism 200 supported by thehead 110, and a presser driving device including an electric motor 20 (such as a stepper motor) and the preferred embodiment of the motor control device according to this invention. Thepresser mechanism 200 includes apresser bar 21 and apresser foot 2 at one end of thepresser bar 21. The motor control device is adapted for controlling operation of theelectric motor 20 that drives movement of thepresser mechanism 200 of the sewing machine, and includes aknee lever mechanism 3, a limitingmodule 4 and a control module 5 (seeFIG. 7 ). - Referring to
FIG. 3 andFIG. 4 , theknee lever mechanism 3 includes anattachment seat 31, aknee lever 32, anactuator 33, avariable resistor component 34 disposed on theattachment seat 31, aswitch component 35 disposed on theattachment seat 31, and afirst spring 36. - The
knee lever 32 is mounted for rotation relative to thebed 100 and is operated by knee contact to rotate. - The
actuator 33 is mounted rotatably to theattachment seat 31 and has a lever-connectingportion 331 connected to theknee lever 32 for co-rotation with theknee lever 32 relative to theattachment seat 31, and adriving portion 332 opposite to the lever-connectingportion 331. Theactuator 33 is disposed between theswitch component 35 and thevariable resistor component 34 with the lever-connectingportion 331 disposed adjacent to theswitch component 35 and the drivingportion 332 disposed adjacent to thevariable resistor component 34. Theactuator 33 is formed with aprotrusion 333 disposed to actuate theswitch component 35 when theactuator 33 is rotated to a predetermined angular position. - The
variable resistor component 34 has arotary axle portion 341, a forcedportion 342 that extends from therotary axle portion 341 and that abuts against the drivingportion 332 of theactuator 33, and aprotrusion part 343 extending from therotary axle portion 341 in a direction opposite to the forcedportion 342, and has a resistance varying with rotation of therotary axle portion 341. Referring toFIG. 5 , the forcedportion 342 is forced by rotation of theactuator 33 so as to rotate therotary axle portion 341 and vary the resistance of thevariable resistor component 34, and further rotation of theactuator 33 to the predetermined angular position results in theprotrusion 333 of theactuator 33 actuating theswitch component 35, as shown inFIG. 6 . - The
first spring 36 has opposite ends that are connected to theattachment seat 31 and theactuator 33, respectively, so as to provide a resilient force to stabilize rotation of theactuator 33. - The limiting
module 4 includes abase seat 41, a limitingmember 42, and asecond spring 43. - The
base seat 41 is disposed on theattachment seat 31 and adjacent to therotary axle portion 341. The limitingmember 42 is disposed on thebase seat 41 and has an end portion disposed to abut against an edge of therotary axle portion 341 of thevariable resistor component 34 when therotary axle portion 341 is at an initial angular position relative to thebase seat 41, as shown inFIGS. 3 and 4 . - The
second spring 43 has opposite ends connected to theprotrusion part 343 and thebase seat 41, respectively. Thesecond spring 43 provides a resilient force to bias therotary axle portion 341 to the initial angular position. - Referring to
FIG. 7 , thecontrol module 5 is electrically coupled to thevariable resistor component 34, theswitch component 35 and theelectric motor 20. Thecontrol module 5 is a programmable module that is configured with a built-inprogram 51 to perform conversion of a resistance variation of thevariable resistor component 34 into a displacement value of thepresser foot 2. For example, a relationship between resistance increment or decrement of thevariable resistor component 34 and the movement direction of thepresser foot 2, and a relationship between the resistance variation of thevariable resistor component 34 and the displacement value of thepresser foot 2 may be user-defined through the built-inprogram 51. When thecontrol module 5 determines theswitch component 35 to be in a non-actuated state, thecontrol module 5 is configured to control operation of theelectric motor 20 to move thepresser mechanism 200 according to the converted displacement value of thepresser foot 2. When thecontrol module 5 determines theswitch component 35 to be in an actuated state, thecontrol module 5 is configured to control operation of theelectric motor 20 to move thepresser mechanism 200 to dispose thepresser foot 2 of thepresser mechanism 200 at a predetermined height relative to thebed 100 of the sewing machine. - To sum up, the motor control device of this invention uses the
knee lever 32 to vary resistance of thevariable resistor component 34, so as to control theelectric motor 20 to drive movement of thepresser foot 2. Through theswitch component 35 and theprotrusion 333, thepresser foot 2 may be disposed at the predetermined height using theknee lever 32. - While the present invention has been described in connection with what is considered the most practical and preferred embodiment, it is understood that this invention is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Claims (13)
1. A motor control device for controlling operation of an electric motor that drives movement of a presser mechanism of a sewing machine, said motor control device comprising:
a knee lever mechanism including:
a switch component,
an actuator rotatable to actuate said switch component when rotated to a predetermined angular position, and
a rotatable knee lever operable by knee contact to rotate and to drive rotation of said actuator; and
a control module coupled to said switch component and to be coupled to the electric motor;
wherein, when said control module determines said switch component to be in an actuated state, said control module is configured to control operation of the electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
2. The motor control device as claimed in claim 1 , wherein said knee lever mechanism further includes a variable resistor component coupled to said control module, spaced apart from said switch component, having a rotary axle portion, and a forced portion that extends from said rotary axle portion and that abuts against said actuator, and having a resistance varying with rotation of said rotary axle portion,
wherein rotation of said actuator forces said forced portion so as to rotate said rotary axle portion and vary the resistance of said variable resistor component;
wherein further rotation of said actuator to the predetermined angular position results in said actuator actuating said switch component; and
wherein, when said control module determines said switch component to be in a non-actuated state, said control module is configured to control operation of the electric motor to move the presser mechanism according to the resistance of said variable resistor component.
3. The motor control device as claimed in claim 2 , wherein said knee lever mechanism further includes an attachment seat, said actuator being mounted rotatably to said attachment seat and having a lever-connecting portion connected to said knee lever for co-rotation with said knee lever relative to said attachment seat, and a driving portion opposite to said lever-connecting portion and abutting against said forced portion of said variable resistor component.
4. The motor control device as claimed in claim 3 , wherein said actuator is disposed between said variable resistor component and said switch component, said variable resistor component being disposed adjacent to said driving portion, said switch component being disposed adjacent to said lever-connection portion.
5. The motor control device as claimed in claim 4 , wherein said actuator is formed with a protrusion disposed to actuate said switch component when said actuator is rotated to the predetermined angular position.
6. The motor control device as claimed in claim 4 , wherein said switch component and said variable resistor component are disposed on said attachment seat.
7. The motor control device as claimed in claim 3 , wherein said knee lever mechanism further includes a first spring having opposite ends that are connected to said attachment seat and said actuator, respectively.
8. The motor control device as claimed in claim 7 , wherein said variable resistor component further has a protrusion part extending from said rotary axle portion, said knee lever mechanism further including a limiting module that includes:
a base seat disposed on said attachment seat and adjacent to said rotary axle portion;
a limiting member disposed on said base seat and having an end portion disposed to abut against said rotary axle portion of said variable resistor component when said rotary axle portion is at an initial angular position relative to said base seat; and
a second spring having opposite ends connected to said protrusion part and said base seat, respectively, said second spring biasing said rotary axle portion to the initial angular position.
9. The motor control device as claimed in claim 3 , wherein said rotary component further has a protrusion part extending from said rotary axle portion, said knee lever mechanism further including a limiting module that includes:
a base seat disposed on said attachment seat and adjacent to said rotary axle portion;
a limiting member disposed on said base seat and having an end portion disposed to abut against said rotary axle portion of said variable resistor component when said rotary axle portion is at an initial angular position relative to said base seat; and
a spring having opposite ends connected to said protrusion part and said base seat, respectively, said spring biasing said rotary axle portion to the initial angular position.
10. The motor control device as claimed in claim 2 , wherein, when said control module determines said switch component to be in the non-actuated state, said control module is configured to convert a resistance variation of said variable resistor component into a displacement value of the presser foot, and to control operation of the electric motor for moving the presser mechanism according to the displacement value.
11. The motor control device as claimed in claim 10 , wherein said control module is a programmable module that is configured with a built-in program to perform conversion of the resistance variation of said variable resistor component into the displacement value of the presser foot.
12. A presser driving device for driving movement of a presser mechanism of a sewing machine, said presser driving device comprising a knee lever mechanism, a control module coupled to said knee lever mechanism, and an electric motor coupled to said control module and to be coupled to the presser mechanism;
wherein said knee lever mechanism includes:
a switch component coupled to said control module,
an actuator rotatable to actuate said switch component when rotated to a predetermined angular position, and
a rotatable knee lever operable by knee contact to rotate and to drive rotation of said actuator;
wherein, when said control module determines said switch component to be in an actuated state, said control module is configured to control operation of said electric motor to move the presser mechanism to dispose a presser foot of the presser mechanism at a predetermined height relative to a bed of the sewing machine.
13. A sewing machine comprising:
a bed;
a head disposed above said bed;
a presser mechanism supported by said head and including a presser bar and a presser foot at one end of said presser bar; and
a presser driving device including a knee lever mechanism, a control module coupled to said knee lever mechanism, and an electric motor coupled to said presser mechanism and said control module;
wherein said knee lever mechanism includes:
a switch component coupled to said control module,
an actuator rotatable to actuate said switch component when rotated to a predetermined angular position, and
a knee lever mounted for rotation relative to said bed and operated by knee contact to rotate and to drive rotation of said actuator;
wherein, when said control module determines said switch component to be in an actuated state, said control module is configured to control operation of said electric motor to move said presser bar to dispose said presser foot at a predetermined height relative to said bed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/927,040 US20140373765A1 (en) | 2013-06-25 | 2013-06-25 | Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/927,040 US20140373765A1 (en) | 2013-06-25 | 2013-06-25 | Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140373765A1 true US20140373765A1 (en) | 2014-12-25 |
Family
ID=52109856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/927,040 Abandoned US20140373765A1 (en) | 2013-06-25 | 2013-06-25 | Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine |
Country Status (1)
Country | Link |
---|---|
US (1) | US20140373765A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109023737A (en) * | 2018-10-17 | 2018-12-18 | 浙江众邦机电科技有限公司 | A kind of the presser foot lifter control system and method for flush joint thickness material machine |
CN109750423A (en) * | 2019-03-26 | 2019-05-14 | 杰克缝纫机股份有限公司 | A kind of electronics knee leans on trigger architecture |
CN109825962A (en) * | 2019-03-26 | 2019-05-31 | 杰克缝纫机股份有限公司 | A kind of electronics knee leans on structure |
US20190169772A1 (en) * | 2017-12-01 | 2019-06-06 | Hsien-Chang Tseng | Knee operated lifting mechanism for a presser foot of a sewing machine |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3353511A (en) * | 1966-02-07 | 1967-11-21 | Singer Co | Operator assist device for sewing machines or the like |
US3541982A (en) * | 1968-01-16 | 1970-11-24 | Rimoldi C Spa Virginio | Pneumatic drive system for thread cutting devices for sewing machine |
US3570428A (en) * | 1968-05-06 | 1971-03-16 | Pfaff Ag G M | Arrangement on sewing machines for operating the motor starter |
US3777686A (en) * | 1972-06-30 | 1973-12-11 | Singer Co | Linear action knee lifters |
US3818849A (en) * | 1971-09-15 | 1974-06-25 | American Needle Positioners In | Indexing attachment |
US4333407A (en) * | 1978-11-09 | 1982-06-08 | Fritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik | Lifting device for the presser foot of a sewing machine |
US4409914A (en) * | 1981-06-19 | 1983-10-18 | The Singer Company | Multi-stage presser lifter device |
US4538533A (en) * | 1982-09-30 | 1985-09-03 | Tokyo Juki Industrial Co., Ltd. | Workpiece holding-down device for a sewing machine |
US4704978A (en) * | 1985-10-28 | 1987-11-10 | Brother Kogyo Kabushiki Kaisha | Sewing machine having an automatic control system |
US4773342A (en) * | 1987-04-30 | 1988-09-27 | Rockwell-Rimoldi S.P.A. | Control device for trimming knives in flat-bed sewing machines |
US5544600A (en) * | 1994-04-25 | 1996-08-13 | Dbh Limited, Inc. | Knee control mechanism for industrial sewing machine |
US6520101B2 (en) * | 2000-11-24 | 2003-02-18 | Janome Sewing Machine Co., Ltd. | Sewing machine with a device for adjusting a pressure applied to a pressure bar and a device for lifting the presser bar |
-
2013
- 2013-06-25 US US13/927,040 patent/US20140373765A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3353511A (en) * | 1966-02-07 | 1967-11-21 | Singer Co | Operator assist device for sewing machines or the like |
US3541982A (en) * | 1968-01-16 | 1970-11-24 | Rimoldi C Spa Virginio | Pneumatic drive system for thread cutting devices for sewing machine |
US3570428A (en) * | 1968-05-06 | 1971-03-16 | Pfaff Ag G M | Arrangement on sewing machines for operating the motor starter |
US3818849A (en) * | 1971-09-15 | 1974-06-25 | American Needle Positioners In | Indexing attachment |
US3777686A (en) * | 1972-06-30 | 1973-12-11 | Singer Co | Linear action knee lifters |
US4333407A (en) * | 1978-11-09 | 1982-06-08 | Fritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik | Lifting device for the presser foot of a sewing machine |
US4409914A (en) * | 1981-06-19 | 1983-10-18 | The Singer Company | Multi-stage presser lifter device |
US4538533A (en) * | 1982-09-30 | 1985-09-03 | Tokyo Juki Industrial Co., Ltd. | Workpiece holding-down device for a sewing machine |
US4704978A (en) * | 1985-10-28 | 1987-11-10 | Brother Kogyo Kabushiki Kaisha | Sewing machine having an automatic control system |
US4773342A (en) * | 1987-04-30 | 1988-09-27 | Rockwell-Rimoldi S.P.A. | Control device for trimming knives in flat-bed sewing machines |
US5544600A (en) * | 1994-04-25 | 1996-08-13 | Dbh Limited, Inc. | Knee control mechanism for industrial sewing machine |
US6520101B2 (en) * | 2000-11-24 | 2003-02-18 | Janome Sewing Machine Co., Ltd. | Sewing machine with a device for adjusting a pressure applied to a pressure bar and a device for lifting the presser bar |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190169772A1 (en) * | 2017-12-01 | 2019-06-06 | Hsien-Chang Tseng | Knee operated lifting mechanism for a presser foot of a sewing machine |
US10801143B2 (en) * | 2017-12-01 | 2020-10-13 | Hsien-Chang Tseng | Knee operated lifting mechanism for a presser foot of a sewing machine |
CN109023737A (en) * | 2018-10-17 | 2018-12-18 | 浙江众邦机电科技有限公司 | A kind of the presser foot lifter control system and method for flush joint thickness material machine |
CN109750423A (en) * | 2019-03-26 | 2019-05-14 | 杰克缝纫机股份有限公司 | A kind of electronics knee leans on trigger architecture |
CN109825962A (en) * | 2019-03-26 | 2019-05-31 | 杰克缝纫机股份有限公司 | A kind of electronics knee leans on structure |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20140373765A1 (en) | Knee-controlled motor control device for a motor-driven presser mechanism of a sewing machine | |
JP5064760B2 (en) | Fixing means supply device for power driving machine | |
JP6703383B2 (en) | Electric switch | |
US20170083039A1 (en) | Rolling return to neutral depressable control | |
US11518013B2 (en) | Electric nail gun | |
JP2007008063A5 (en) | ||
JP2006221908A (en) | Trigger switch circuit | |
JP2015526301A (en) | Power tools and manual electrical equipment | |
JPS5810806B2 (en) | Sokudoseigiyosouchi | |
JP4758322B2 (en) | Switch device | |
WO2018039098A1 (en) | Variable force electronic vehicle clutch pedal | |
JP7135589B2 (en) | trigger switch | |
US10978257B2 (en) | Lock-off assembly for use in locking-off a trigger of an electrical device | |
JP4709170B2 (en) | Moderation device | |
US9943219B2 (en) | Multidirectional foot controller | |
US10520134B2 (en) | Handheld work apparatus having a device for starting an electric drive motor | |
JP2007257852A (en) | Jog switch structure having rotation volume | |
US7377212B1 (en) | Automatic band conveying device | |
JP4717747B2 (en) | Automatic reset switch | |
JP2009254624A (en) | Back stitch device for sewing machine | |
RU2006126333A (en) | VACUUM CLEANER WITH CONTROL ELEMENT | |
EP2990163B1 (en) | Electric power tool | |
JP2008041616A5 (en) | ||
US6816770B1 (en) | Direction and speed control device for a motor vehicle | |
CN108221207B (en) | Pedal controller of sewing machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ZENG HSING INDUSTRIAL CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TSENG, SHUI-CHUN;CHANG, FEI-JEN;TSAI, JUNG-NAN;REEL/FRAME:030685/0157 Effective date: 20130610 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |