CN108796842B - Auxiliary device for lifting presser foot and sewing machine - Google Patents
Auxiliary device for lifting presser foot and sewing machine Download PDFInfo
- Publication number
- CN108796842B CN108796842B CN201710286702.4A CN201710286702A CN108796842B CN 108796842 B CN108796842 B CN 108796842B CN 201710286702 A CN201710286702 A CN 201710286702A CN 108796842 B CN108796842 B CN 108796842B
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- Prior art keywords
- wrench
- presser foot
- lifting
- auxiliary device
- arc
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
Abstract
The invention provides an auxiliary device for lifting a presser foot and a sewing machine, wherein a spanner is pressed down in the sewing machine to drive a presser foot component to lift, one end of the spanner is rotationally positioned on a machine shell of the sewing machine and is connected with the presser foot component through a transmission component, the other end of the spanner is used as a driving end and is used for bearing the pressure required by the lifting of the presser foot component, the auxiliary device comprises an elastic part with one end connected with the machine shell and a force transmission part connected with the other end of the elastic part, the force transmission part is connected with the spanner and provides a driving force for the spanner, when the presser foot is not lifted, namely the spanner is in an initial state, the driving force points to the rotation center of the spanner, and when the presser foot is lifted, namely the driving end of the spanner is pressed to rotate, the force transmission part provides the driving force for the spanner to change in direction and. When the pressure foot is lifted, the pressure wrench lifting force can be reduced, and the use cost is saved.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to an auxiliary device for lifting a presser foot and a sewing machine.
Background
In the existing sewing machine, the purpose of lifting the presser foot component is generally achieved by pressing down a spanner. The pressure foot lifting mode in the current market is generally divided into two modes, one mode is that a wrench is manually pressed down to lift the pressure foot, and the other mode is that the pressure foot is automatically lifted. The pressure of the presser foot of the industrial sewing machine is required to be large, so that the force for lifting and pressing the wrench is heavy, the labor intensity of workers can be increased when the pressure is manually lifted, the cost can be increased if the pressure is automatically lifted, and the electromagnet also has the problems of heating and short service life.
For example, chinese patent 201611267173.5 discloses a sewing machine with a novel automatic presser foot lifting structure; the device comprises an automatic presser foot lifting device, wherein a holding device is arranged on an outer frame of a presser foot electromagnet of the automatic presser foot lifting device, and the holding device abuts against the outer wall of a presser foot electromagnet iron core when the presser foot electromagnet iron core extends out; the end surface of the presser foot electromagnet core is clamped when the presser foot electromagnet core is attracted. This application discloses an automatic presser foot structure of lifting has realized automatic presser foot of lifting through the presser foot electro-magnet, nevertheless lifts the presser foot in-process, lifts the drive power of presser foot and is driven by the presser foot electro-magnet completely, and when needs great pressure wrench power of lifting, the presser foot electro-magnet easily generates heat, influences its life.
Therefore, there is a need for an auxiliary device that reduces the rotational force required to drive the wrench during the pressure foot lifting process.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, an object of the present invention is to provide an auxiliary device for lifting a presser foot and a sewing machine, which are used for solving the problem of the prior art that the cost for lifting the presser foot is high due to the large force required by a driving wrench in the process of lifting the presser foot.
In order to achieve the above and other related objects, the present invention provides an auxiliary device for lifting a presser foot, in a sewing machine, a presser foot assembly is driven to lift by pressing down a wrench, one end of the wrench is rotatably positioned on a machine shell of the sewing machine and is connected with the presser foot assembly through a transmission assembly, the other end of the wrench is used as a driving end, for bearing the pressure required when the presser foot component is lifted, the auxiliary device comprises an elastic piece with one end connected with the machine shell, and a force transmission piece connected with the other end of the elastic piece, wherein the force transmission piece is connected with the wrench and gives a driving force to the wrench, when the presser foot is not lifted, namely the spanner is in an initial state, the driving force points to the rotation center of the spanner, when the pressure foot is lifted, namely the driving end of the wrench is pressed to rotate, the driving force direction given to the wrench by the force transmission piece is changed and the torque which is the same as the rotation direction of the wrench is provided.
Preferably, the power transmission piece is a limiting clamping plate rotatably arranged on the casing, one end of the limiting clamping plate is connected with the elastic piece, and the other end of the limiting clamping plate is connected with the driving end of the wrench.
Preferably, a positioning pin is arranged at the driving end of the wrench, an arc-shaped surface is arranged at the other end of the limiting clamping plate, and the arc-shaped surface abuts against the positioning pin and can slide along the positioning pin.
Preferably, the elastic part is a tension spring, one end of the elastic part connected with the casing is located above the limiting clamping plate, and the rotating center of the limiting clamping plate is located below the wrench.
Preferably, the elastic member is a tension spring, a compression spring or a torsion spring.
Preferably, the force transmission piece is an extension part formed by extending one end of the wrench, an arc-shaped groove is formed in the extension part, one end of the elastic piece is connected with the casing through a positioning plate, a positioning shaft is connected to the other end of the elastic piece, and the positioning shaft is arranged in the arc-shaped groove in a sliding mode.
Preferably, the positioning plate is provided with a long groove, and a positioning piece connected with the shell is arranged in the long groove.
Preferably, one end of the elastic part connected with the casing is located above the wrench, and the arc-shaped groove is a sliding groove bent downwards.
Preferably, the starting end of the arc-shaped groove needs to satisfy: when the wrench is in an initial state, the positioning shaft is located at the starting end of the arc-shaped groove, and the central line of the elastic piece and the rotation center of the wrench are located on the same straight line.
The invention provides a sewing machine, which is provided with the auxiliary device for lifting the presser foot.
As described above, the auxiliary device for lifting the presser foot and the sewing machine according to the present invention have the following advantageous effects: the auxiliary device is arranged at the wrench, an elastic piece in the auxiliary device gives a driving force to the wrench through a force transmission piece, and when the pressure foot is not lifted, the driving force points to the rotation center of the wrench, so that the initial state of the wrench is not influenced; and the direction of the driving force is changed in the process of lifting the presser foot, namely the force transmission piece provides torque in the same direction as the rotation direction of the wrench, namely the driving force is changed into additional power for rotating the wrench, and finally the effect of reducing the force of lifting and pressing the wrench is achieved.
Drawings
Fig. 1 is a schematic view showing a first embodiment of the auxiliary device for lifting a presser foot according to the present invention.
Fig. 2 is a view showing a state where the presser foot is not lifted in the first embodiment of the auxiliary device for lifting the presser foot of the present invention.
Fig. 3 is a view showing a state in which the auxiliary device for lifting the presser foot according to the first embodiment of the present invention lifts the presser foot.
Fig. 4 is a schematic view of the presser foot not lifted state shown in fig. 2.
Fig. 5 is a schematic view of the presser foot lifting state shown in fig. 3.
Fig. 6 is a schematic view showing a second embodiment of the auxiliary device for lifting the presser foot according to the present invention.
Fig. 7 is a view showing a state where the presser foot is not lifted in the second embodiment of the auxiliary device for lifting the presser foot of the present invention.
Fig. 8 is a view showing a state in which the auxiliary device for lifting the presser foot of the second embodiment of the present invention lifts the presser foot.
Fig. 9 is a schematic view of the presser foot not lifted state shown in fig. 7.
Fig. 10 is a schematic view of the presser foot lifting state shown in fig. 8.
Description of the element reference numerals
1 spanner
2 drive assembly
3 presser foot subassembly
4 positioning plate
41 mounting chute
5 tension spring
6 spacing cardboard
61 rotating pin
601 arc surface
7 positioning pin
8 tension spring
9 locating plate
91 long groove
92 positioning piece
10 positioning shaft
11 rotating shaft
12 drive end
13 holder
100 casing
101 arc-shaped groove
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 10. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 to 6, the present invention provides an auxiliary device for lifting a presser foot, in a sewing machine, a presser foot component 3 is driven to lift by pressing down a wrench 1, one end of the wrench 1 is rotatably positioned on a machine shell 100 of the sewing machine and is connected with the presser foot component 3 through a transmission component 2, the other end of the wrench 1 is used as a driving end 12, for bearing the pressure required when the presser foot assembly 3 is lifted, the auxiliary device comprises an elastic member having one end connected to the casing 100, and a force transmission piece connected with the other end of the elastic piece, wherein the force transmission piece is connected with the wrench and gives a driving force to the wrench, when the presser foot is not lifted, namely the spanner is in an initial state, the driving force points to the rotation center of the spanner, when the pressure foot is lifted, namely the driving end of the wrench is pressed to rotate, the driving force direction given to the wrench by the force transmission piece is changed and the torque which is the same as the rotation direction of the wrench is provided. The auxiliary device is arranged at the wrench 1, the elastic part in the auxiliary device gives a driving force to the wrench through the force transmission part, and when the pressure foot is not lifted, the driving force points to the rotation center of the wrench 1, so that the initial state of the wrench is not influenced; and the direction of the driving force is changed in the process of lifting the presser foot, namely the force transmission piece provides torque in the same direction as the rotation direction of the wrench, namely the driving force is changed into additional power for rotating the wrench, and finally the effect of reducing the force of lifting and pressing the wrench is achieved.
As shown in fig. 1 to 6, which are specific embodiments of the present invention, the force transmission member in this embodiment is a limiting clamping plate 6 rotatably disposed on the casing 100, in this embodiment, the limiting clamping plate 6 is connected to the casing 100 through a rotating pin 61, and the rotating pin 61 is a rotation center of the limiting clamping plate; one end of the limiting clamping plate 6 is connected with the elastic part, and the other end of the limiting clamping plate 6 is connected with the driving end of the wrench 1. This embodiment sets up spacing cardboard 6 through the drive end at spanner 1, and above-mentioned elastic component passes power for spanner 1 through spacing cardboard 6, realizes then that the used external force of drive spanner 1 when lifting the presser foot reduces.
In this embodiment, the elastic member is a tension spring 5, one end of the tension spring 5 connected to the casing 100 is located above the limiting clamping plate 6, and the rotation center of the limiting clamping plate 6 is located below the wrench 1. Provide a drive power through extension spring 5 and make spacing cardboard rotatory for spacing cardboard 6 in this embodiment, and then make the other end of spacing cardboard 6 give spanner 1 drive power. In order to better realize that the limiting clamping plate 6 acts on the wrench 1, in this embodiment, a positioning pin 7 is provided at the driving end of the wrench 1, and the other end of the limiting clamping plate 6 has an arc-shaped surface 601, the arc-shaped surface 601 abuts against the positioning pin 7 and can slide along the positioning pin 7, and in this embodiment, the limiting clamping plate 6 is in tangential contact with the positioning pin 7.
The specific working process of this embodiment is as follows: when the presser foot is not lifted, as shown in fig. 2 and 4, since the tension spring 5 is in a stretched state, the tension spring itself has an elastic force F2, which provides an initial moment to the limit catch plate 6, so that the limit catch plate tightly presses on the positioning pin 7 of the wrench 1, and further provides an initial driving force, i.e., a force F in the figure, for the wrench 1, but the direction of the force F is directed to the rotation center of the wrench 1, i.e., to the center of the rotation shaft 11 of the wrench, as shown in fig. 2, so the initial state of the wrench 1 is not affected. In the process of lifting the presser foot, as shown in fig. 3 and 5, because the drive end of the wrench 1 is rotated downwards under the action of the pressure F1, at this time, the tangent plane of the positioning pin 7 of the limiting clamping plate 6 and the wrench 1 changes, the direction of the driving force F given to the wrench 1 by the limiting clamping plate 6 changes, and the direction changes to the lower side of the rotation center of the wrench 1, at this time, the limiting clamping plate 6 can provide a torque which is the same as the downward rotation direction of the wrench 1, the wrench is rotated anticlockwise under the downward pressure in fig. 5, then the limiting clamping plate 6 gives the wrench 1 an anticlockwise torque, so the downward rotation torque of the wrench 1 can be reduced, and finally the effect of lifting and pressing the wrench force is reduced, that is, the pressure F1 is reduced. In the process of lifting the presser foot, the driving force given to the wrench by manpower or an automatic presser foot lifting device is reduced, and the purpose of easily lifting the presser foot is achieved.
The elastic member in this embodiment may also be a compression spring or a torsion spring, or another elastically deformable article capable of giving the elastic force to the limiting plate member 6. If the elastic member in this embodiment is a compression spring, the arrangement position of the elastic member can be set to the mirror image position of the tension spring 5, and only an elastic force is required to be given to the limiting plate member, and the elastic force enables the limiting plate member 6 to give a driving force to the wrench 1, and when the presser foot is not lifted, the driving force points to the rotation center of the wrench, the driving force direction is changed in the process of lifting the presser foot, and the limiting plate member gives the wrench a driving moment in the same direction as the rotation direction of the wrench.
The connection mode of the limiting plate 6 and the wrench in this embodiment may also be other modes, and is not limited to the mode that the arc-shaped surface 601 abuts against the positioning pin 7, for example, it may be that an arc-shaped groove is provided on the driving end of the wrench 1, so that the limiting plate 6 is inserted into the arc-shaped groove through a structure such as a protrusion to generate an acting force on the wrench. That is to say, only need to transmit the drive end of spanner indirectly with the elasticity of elastic component, and give the drive power of spanner and point to the centre of rotation of spanner when initial, drive power direction change in the presser foot lifting process, give the spanner a turning moment that rotates the direction the same with the spanner, and then alleviate the spanner and lift the required external force of presser foot.
As shown in fig. 7 to 10, in another embodiment of the present invention, the force transmission member is an extended portion formed by extending one end of the wrench 1 (the end is opposite to the driving end 12 of the wrench 1), the extended portion has an arc-shaped groove 101, one end of the elastic member is connected to the housing 100 through the positioning plate 9, the other end of the elastic member is connected to a positioning shaft 10, and the positioning shaft 10 is slidably disposed in the arc-shaped groove 101. In this embodiment, the end opposite to the driving end of the wrench is provided with the arc-shaped groove, so that the elastic part can provide driving force for the wrench, and the wrench can generate the rotating torque in the same direction as the rotation direction of the wrench in the process of lifting the presser foot. The elastic member in this embodiment is a tension spring 8, one end of the tension spring 8 connected to the casing 100 is located above the wrench 1, and the arc-shaped groove 101 is a sliding groove bent downward, as shown in fig. 6. For better realization when not lifting the presser foot, the elastic component does not influence the state of spanner, and the initiating terminal of above-mentioned arc wall 101 needs to satisfy: when the wrench 1 is in the initial state, the positioning shaft 10 is located at the beginning end of the arc-shaped slot 101, as shown in fig. 7 and 9, and the center line of the elastic member (i.e., the tension spring 8) is located on the same line with the rotation center of the wrench 1.
The specific working process of this embodiment is as follows: when the presser foot is not lifted, as shown in fig. 7 and 9, the tension spring 8 is in a stretched state, so that a pulling force F is provided to the positioning shaft 10, and the positioning shaft 10 is in the arc-shaped groove 101 of the wrench 1, so that the pulling force F is provided to the wrench 1, but the direction of the pulling force F passes through the rotation center of the wrench 1, so that the state of the wrench 1 is not affected. In the process of lifting the presser foot, as shown in fig. 8 and 10, the driving end of the wrench 1 receives the pressure F1 to rotate counterclockwise and downward, at this time, the distance between the connection position of the positioning shaft 10 and the tension spring 8 and the casing 100 is gradually shortened due to the upward movement of the arc-shaped groove 101 of the wrench 1, that is, the tension spring 8 is shortened, so that the positioning shaft 10 can slide rightward along the arc-shaped groove 101, at this time, the direction of the force provided to the wrench 1 is deviated, and a counterclockwise torque can be provided to the wrench 1, as shown in fig. 10, the pressure F1 for driving the wrench 1 is finally relieved.
The positioning plate 9 in this embodiment has a long groove 91, as shown in fig. 6, a positioning member 92 connected to the housing 100 is disposed in the long groove 91, and the positioning member is disposed in the long groove 91 to position one end of the tension spring 8, so as to ensure that the other end of the tension spring 8 slides along the arc-shaped groove 101 during the presser foot lifting process.
The elastic member in this embodiment may also be a compression spring or a torsion spring, or may also be another object having elastic deformation and providing elasticity. If the elastic member in this embodiment is a compression spring, the arrangement mode of the elastic member may be the mirror image arrangement of the above-mentioned tension spring, that is, the compression spring is disposed below the wrench, and the direction of the above-mentioned arc-shaped groove is correspondingly reversely bent.
The force transmission piece in the embodiment is an extension part of the wrench, namely, the force transmission piece and the wrench are integrated, or the force transmission piece and the wrench can be parts separated from the wrench, so that only the elastic force of the elastic piece can be accurately applied to the wrench, the initial state of the wrench is not influenced when the presser foot is not lifted, and the rotation of the wrench is facilitated when the presser foot is lifted.
The invention provides a sewing machine, which is provided with the auxiliary device for lifting the presser foot, and the auxiliary device can be adopted to reduce the force for lifting the presser foot when the presser foot is lifted, so as to save the cost when the whole sewing machine is used. In order to better drive and hold the wrench 1, as shown in fig. 6, a holder 13 is provided on the housing 100, and the wrench is placed in a holding groove of the holder 13, and the rotation stroke of the wrench 1 is limited by the holding groove.
In summary, the auxiliary device for lifting the presser foot and the sewing machine of the invention adopt the technical scheme that the auxiliary device is arranged at the wrench, the elastic element in the auxiliary device gives a driving force to the wrench through the force transmission element, and when the presser foot is not lifted, the driving force points to the rotation center of the wrench, so that the initial state of the wrench is not influenced; and the direction of the driving force is changed in the process of lifting the presser foot, namely the force transmission piece provides torque in the same direction as the rotation direction of the wrench, namely the driving force is changed into additional power for rotating the wrench, and finally the effect of reducing the force of lifting and pressing the wrench is achieved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An auxiliary device for lifting a presser foot is characterized in that the auxiliary device comprises an elastic part and a force transmission part, wherein one end of the elastic part is connected with the machine shell of the sewing machine in a rotating mode, the force transmission part is connected with the wrench and gives a driving force to the wrench, when the presser foot is not lifted, namely the wrench is in an initial state, the driving force points to the rotating center of the wrench, and when the presser foot is lifted, namely the driving end of the wrench is pressed to rotate, the driving force direction given to the wrench by the force transmission part is changed and a torque in the same direction as the rotating direction of the wrench is provided.
2. The auxiliary device for lifting the presser foot according to claim 1, wherein: the power transmission piece is a limiting clamping plate which is rotatably arranged on the shell, one end of the limiting clamping plate is connected with the elastic piece, and the other end of the limiting clamping plate is connected with the driving end of the wrench.
3. The auxiliary device for lifting the presser foot according to claim 2, wherein: the wrench is characterized in that a positioning pin is arranged at the driving end of the wrench, an arc-shaped surface is arranged at the other end of the limiting clamping plate, and the arc-shaped surface abuts against the positioning pin and can slide along the positioning pin.
4. The auxiliary device for lifting the presser foot according to claim 3, wherein: the elastic part is a tension spring, one end of the elastic part connected with the casing is positioned above the limiting clamping plate, and the rotating center of the limiting clamping plate is positioned below the wrench.
5. The auxiliary device for lifting the presser foot according to claim 1, wherein: the elastic part is a tension spring, a pressure spring or a torsion spring.
6. The auxiliary device for lifting the presser foot according to claim 1, wherein: the force transmission piece is an extension part formed by extending one end of the wrench, an arc-shaped groove is formed in the extension part, one end of the elastic piece is connected with the shell through a positioning plate, a positioning shaft is connected to the other end of the elastic piece, and the positioning shaft is arranged in the arc-shaped groove in a sliding mode.
7. The auxiliary device for lifting the presser foot according to claim 6, wherein: the positioning plate is provided with a long groove, and a positioning piece connected with the shell is arranged in the long groove.
8. The auxiliary device for lifting the presser foot according to claim 6, wherein: the elastic part with the one end that the casing links to each other is located the top of spanner, the arc wall is the spout of downwarping.
9. The auxiliary device for lifting the presser foot according to claim 6, wherein: the starting end of the arc-shaped groove needs to meet the following requirements: when the wrench is in an initial state, the positioning shaft is located at the starting end of the arc-shaped groove, and the central line of the elastic piece and the rotation center of the wrench are located on the same straight line.
10. A sewing machine characterized by: the sewing machine has an auxiliary device for lifting the presser foot as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710286702.4A CN108796842B (en) | 2017-04-27 | 2017-04-27 | Auxiliary device for lifting presser foot and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710286702.4A CN108796842B (en) | 2017-04-27 | 2017-04-27 | Auxiliary device for lifting presser foot and sewing machine |
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| Publication Number | Publication Date |
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| CN108796842A CN108796842A (en) | 2018-11-13 |
| CN108796842B true CN108796842B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710286702.4A Active CN108796842B (en) | 2017-04-27 | 2017-04-27 | Auxiliary device for lifting presser foot and sewing machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109281073B (en) * | 2018-11-16 | 2020-08-21 | 杰克缝纫机股份有限公司 | Sewing machine and lift presser foot device thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388886A (en) * | 1981-12-17 | 1983-06-21 | The Singer Company | Reduced load presser bar |
| JPS6320153B2 (en) * | 1984-09-29 | 1988-04-26 | Tokyo Juki Industrial Co Ltd | |
| JPH05154260A (en) * | 1991-02-19 | 1993-06-22 | Juki Corp | Perssing type raising/lowering device |
| DE3530731C2 (en) * | 1984-08-28 | 1993-08-05 | Tokyo Juki Industrial Co., Ltd., Chofu, Tokio/Tokyo, Jp | |
| JPH0767512B2 (en) * | 1988-06-02 | 1995-07-26 | ペガサスミシン製造株式会社 | Presser foot lifting assist device |
| CN203947281U (en) * | 2014-07-16 | 2014-11-19 | 杰克缝纫机股份有限公司 | Casing head is established the Sewing machines of foot lifting mechanism |
| CN204919000U (en) * | 2015-10-28 | 2015-12-30 | 浙江美机缝纫机有限公司 | Sewing machine lifts presser foot device |
-
2017
- 2017-04-27 CN CN201710286702.4A patent/CN108796842B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388886A (en) * | 1981-12-17 | 1983-06-21 | The Singer Company | Reduced load presser bar |
| DE3530731C2 (en) * | 1984-08-28 | 1993-08-05 | Tokyo Juki Industrial Co., Ltd., Chofu, Tokio/Tokyo, Jp | |
| JPS6320153B2 (en) * | 1984-09-29 | 1988-04-26 | Tokyo Juki Industrial Co Ltd | |
| JPH0767512B2 (en) * | 1988-06-02 | 1995-07-26 | ペガサスミシン製造株式会社 | Presser foot lifting assist device |
| JPH05154260A (en) * | 1991-02-19 | 1993-06-22 | Juki Corp | Perssing type raising/lowering device |
| CN203947281U (en) * | 2014-07-16 | 2014-11-19 | 杰克缝纫机股份有限公司 | Casing head is established the Sewing machines of foot lifting mechanism |
| CN204919000U (en) * | 2015-10-28 | 2015-12-30 | 浙江美机缝纫机有限公司 | Sewing machine lifts presser foot device |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |