CN110284269B - Presser foot structure in sewing machine - Google Patents
Presser foot structure in sewing machine Download PDFInfo
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- CN110284269B CN110284269B CN201910642245.7A CN201910642245A CN110284269B CN 110284269 B CN110284269 B CN 110284269B CN 201910642245 A CN201910642245 A CN 201910642245A CN 110284269 B CN110284269 B CN 110284269B
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- presser foot
- locking hook
- groove
- sewing machine
- clamping groove
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/06—Presser feet
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a presser foot structure in a sewing machine, and belongs to the technical field of sewing machines. The presser foot replacing device solves the technical problems that the presser foot replacing cost is high, the efficiency is low or the presser foot replacing is convenient but the sewing effect is influenced and the like. According to the presser foot structure in the sewing machine, a presser foot bottom plate pin transversely penetrates through the middle of the presser foot bottom plate, and the front end of the lower part of a presser foot handle is provided with a clamping groove I; a sliding groove is formed in the rear side of the presser foot handle, and a slidable limiting seat is arranged in the sliding groove; a locking hook is hinged to one side of the presser foot handle, a hook part extends inwards from one side of the front end of the locking hook, and a second clamping groove corresponding to the first clamping groove is formed in the inner wall of the hook part; when the locking hook swings clockwise, the second clamping groove is far away from the bottom plate pin; when the locking hook swings anticlockwise to the lower side face of the rear end of the locking hook and abuts against the upper side face of the limiting seat, the second clamping groove on the locking hook and the first clamping groove are in butt joint and tightly hold the bottom plate pin. The presser foot structure reduces the replacement cost of the presser foot and improves the efficiency of replacing the presser foot under the condition of not influencing the sewing effect.
Description
Technical Field
The invention belongs to the technical field of sewing machines, and relates to a presser foot structure in a sewing machine.
Background
The presser foot is one of sewing machine's important constitution, and the phenomenon that wearing and tearing will appear after the presser foot uses a period, in order to guarantee the sewing effect, need change the presser foot often, changes the presser foot and usually has two kinds of modes: firstly, the integral replacement of the presser foot handle and the presser foot bottom plate is realized by detaching the presser foot screw, and the frequent detachment of the presser foot screw can cause the thread hole of the presser foot rod to be smooth, so that the connection between the presser foot and the presser foot rod is not firm, and the replacement cost is very high; secondly, the presser foot bottom plate is replaced by disassembling the presser foot pin, the method is very troublesome to operate, and the presser foot replacing efficiency is low.
Chinese patent (publication number: CN 205803781U; publication date: 2016-12-14) discloses a quickly detachable presser foot of a sewing machine, wherein the presser foot is made of plastic materials, the top of a pin hole of a connecting part at the top of the presser foot is provided with an opening, and the detachment between a hinge hole of the presser foot and a pin shaft of a presser foot handle can be conveniently realized through the opening.
Although the presser foot base plate can be replaced quickly, the pin shaft of the presser foot handle is hinged to the pin hole with the opening in the presser foot, and the stability of the presser foot is poor when the sewing machine works, which affects the sewing effect of the sewing machine.
Disclosure of Invention
The invention provides a presser foot structure in a sewing machine aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: the convenience of changing the presser foot is improved under the condition of not influencing the sewing effect, and meanwhile, the cost of changing the presser foot is reduced.
The purpose of the invention can be realized by the following technical scheme:
a presser foot structure in a sewing machine comprises a presser foot handle and a presser foot bottom plate, and is characterized in that the middle of the upper side of the presser foot bottom plate is transversely provided with a bottom plate pin in a penetrating manner, and the front end of the lower part of the presser foot handle is provided with a first clamping groove; a transverse sliding groove is formed in the rear side of the presser foot handle, and a limiting seat capable of sliding back and forth along the length direction of the sliding groove is arranged in the sliding groove; a locking hook is hinged to the side face of one side of the presser foot handle and can swing around a hinge point, one end of the locking hook is provided with a clamping groove II corresponding to the clamping groove I, and the clamping groove I and the clamping groove II surround to form a clamping hole for clamping the bottom plate pin; the other end downside of locking hook can with the side looks butt of going up of spacing seat.
In the presser foot structure in the sewing machine, the upper part of the presser foot handle is fixedly connected with a vertically arranged presser foot rod, one side of the front end of the locking hook extends inwards to form a hook part, and the clamping groove is positioned on the inner wall of the hook part; a bottom plate pin on the presser foot bottom plate is arranged in the first clamping groove, and when the locking hook swings clockwise, the second clamping groove is far away from the bottom plate pin; when the locking hook anticlockwise swings to the lower side face of the rear end of the locking hook and the upper side face of the limiting seat is abutted, the second clamping groove on the locking hook is abutted with the first clamping groove and tightly holds the bottom plate pin.
The working principle is as follows: in the technical scheme, the presser foot base plate is replaced, so that the replacement cost of the presser foot is reduced; the lower part front end of presser foot handle is opened there is draw-in groove one, it has draw-in groove two to open on the locking hook, counter-clockwise turning locking hook, when the rear end of locking hook swings above the spout, spacing seat roll-off from the spout, keep out on the downside of the rear end of locking hook, draw-in groove two on the locking hook will the butt on the outer peripheral face of bottom plate round pin and embrace the bottom plate round pin with draw-in groove one, the bottom plate round pin can not become flexible at operating condition, can not influence sewing effect, when needing to change the presser foot bottom plate, impel the spout with spacing seat in, clockwise turning locking hook, draw-in groove one can be kept away from to the draw-in groove two of locking hook, just can take out the presser foot bottom plate, it is very convenient to change the presser foot bottom plate, such.
In the presser foot structure in the sewing machine, one end of the chute is screwed with a fastening screw, and a first return spring is arranged between the limiting seat and the fastening screw. The telescopic property of the return spring is used for facilitating the sliding of the limiting seat, and convenience is provided for replacing the presser foot.
In the presser foot structure of the sewing machine, the limiting seat comprises a clamping joint and a shifting block integrally formed with the clamping joint, the clamping joint is located in the chute, and the shifting block extends out of the presser foot handle from one side of the peripheral surface of the clamping joint. The clamping joint of the limiting seat is positioned in the sliding groove, and the shifting block is positioned outside the presser foot handle, so that the limiting seat can be conveniently shifted.
In the presser foot structure in the sewing machine, a limit boss and a limit pin located obliquely below the limit boss are further arranged on the side surface of the presser foot handle, the rear end of the locking hook is located between the limit boss and the limit pin, and the limit boss is located above the chute; the limiting boss is vertically provided with a second reset spring, the upper side face of the rear end of the locking hook is provided with a groove, one end of the second reset spring is located in the groove, and the other end of the second reset spring abuts against the limiting boss. The pressure foot handle is provided with a limiting boss and a limiting pin for limiting the swinging amplitude of the locking hook, when the locking hook swings, the locking hook swings to the upper side surface of the rear end and is attached to the lower side surface of the limiting boss, and the clamping groove II and the clamping groove I clamp the bottom plate pin at the moment; when the locking hook swings to the lower side face and is abutted to the limiting pin, the second clamping groove is far away from the base plate pin, the inner side face of the rear end of the locking hook can be abutted to the limiting seat, the limiting seat is located in the sliding groove, the second reset spring is arranged to enable the locking hook to swing clockwise under the elastic action of the second reset spring, the presser foot base plate can be replaced conveniently, the upper side face of the rear end of the locking hook is provided with a groove, the lower end of the first reset spring can be abutted to the groove, the first reset spring can be fixed conveniently, and meanwhile the service life of the first reset spring is prolonged.
In the presser foot structure in the sewing machine, one end of the inner wall of the groove is an arc surface and the other end is an inclined surface inclined downwards. The cross section of the first reset spring is circular, one end of the inner wall of the groove is provided with an arc surface which can be attached to the side surface of the reset spring, the reset spring is positioned when the locking state is convenient, the other end of the inner wall of the groove is an inclined surface, and the reset spring acts on the locking hook all the time when the locking hook swings conveniently.
In the presser foot structure in the sewing machine, a first protruding block and a second protruding block which protrude outwards are respectively arranged on the upper side and the lower side of the first clamping groove on the presser foot handle, and the bottom plate pin can be arranged between the first protruding block and the second protruding block; a notch which penetrates through the middle of the hook part of the locking hook up and down is formed in the middle of the hook part of the locking hook, and the first protruding block and the second protruding block can be clamped in the notch. The first projection and the second projection are arranged on the first clamping groove to facilitate positioning of the presser foot bottom plate, and the hook portion of the locking hook is provided with a notch to facilitate embedding of the first projection and the second projection in a locking state.
In the presser foot structure of the sewing machine, an extension arm is provided at a position on one side of the locking hook, the position being close to the rear end of the locking hook, and the extension arm extends outwards. The arrangement of the extension arm is convenient for swinging the locking hook by hands, so that the hands of an operator are prevented from being injured when the presser foot is replaced.
In the presser foot structure of the sewing machine, the locking hook is hinged to the presser foot handle through an axial screw, the axial screw penetrates through the middle of the locking hook, and the limit pin is located behind the axial screw. The locking hook protrudes upwards from the middle to the rear end, and the limiting pin is positioned behind the shaft position screw so as to be convenient for positioning the locking hook in a reasonable swinging range.
In the presser foot structure in the sewing machine, the first clamping groove is a semicircular groove, the upper end of the second clamping groove is butted with the upper end of the first clamping groove, and the lower end of the second clamping groove is located below the lower end of the first clamping groove and butted against the side wall of the presser foot handle. The cross-sectional area of the second clamping groove is larger than that of the first clamping groove, and the lower end of the second clamping groove is arranged below the lower end of the first clamping groove, so that the second clamping groove, the first clamping groove and the bottom plate pin are conveniently separated when the presser foot structure is in an open state.
In the presser foot structure in the sewing machine, the lower side of the rear end of the locking hook is provided with a first abutting plane, and the clamping joint of the limiting seat is provided with a second abutting plane abutting against the first abutting plane. The first abutting platform of the locking hook abuts against the second abutting platform of the clamping connector, so that abrasion of the locking hook and the limiting seat can be reduced.
Compared with the prior art, the invention has the following advantages:
1. according to the presser foot structure, the presser foot normally works in a locking state by utilizing the mutual matching of the structure, the locking hook and the limiting seat, the sewing effect cannot be influenced, the presser foot bottom plate can be taken out in an opening state, and when the presser foot needs to be replaced, the presser foot bottom plate is very convenient to replace, so that the convenience of replacing the presser foot is improved, and the replacement cost of the presser foot is reduced.
2. The limit boss, the limit pin, the first return spring, the second return spring and the like arranged on the presser foot structure limit the swing range of the locking hook, and convenience is provided for replacing the presser foot bottom plate.
Drawings
Fig. 1 is a schematic perspective view of the presser foot structure.
Fig. 2 is an exploded view of the present presser foot arrangement.
Fig. 3 is a schematic structural view of the presser foot structure when the locking hook and the presser foot handle are in a locking state.
Fig. 4 is a schematic structural view of the presser foot structure when the locking hook and the presser foot handle are in an open state.
Fig. 5 is a first structural schematic diagram of a locking hook in the structure of the presser foot.
Fig. 6 is a second structural schematic view of the locking hook in the present presser foot structure.
Fig. 7 is a schematic structural view of a limiting seat in the presser foot structure.
In the figure, 1, a presser foot handle; 101. a first clamping groove; 102. a chute; 103. a limiting boss; 104. a first bump; 105. a second bump; 2. a presser foot base plate; 3. a presser bar; 4. a floor pin; 5. a limiting seat; 501. a clamping head; 502. shifting blocks; 503. abutting against the second plane; 6. locking the hook; 601. a hook portion; 601a and a second card slot; 601b, a gap; 602. a groove; 603. an extension arm; 604. abutting against the first plane; 7. fastening screws; 8. a first return spring; 9. a spacing pin; 10. a second return spring; 11. the screw is positioned axially.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, the presser foot structure in the sewing machine of this embodiment includes a presser foot handle 1 and a presser foot base plate 2, the upper portion of the presser foot handle 1 is fixedly connected with a presser foot rod 3, the lower end is rotatably connected with the presser foot base plate 2, a base plate pin 4 transversely penetrates through the middle portion of the presser foot base plate 2, a transverse first clamping groove 101 is formed at the front end of the lower portion of the presser foot handle 1, the first clamping groove 101 abuts against the outer peripheral surface of the base plate pin 4, a transverse sliding groove 102 is formed at the rear end of the presser foot handle 1, a limiting seat 5 capable of sliding along the length direction of the sliding groove 102 is arranged in the sliding groove 102, a fastening screw 7 is screwed to one end of the sliding groove 102, a first return spring 8 is abutted between the limiting seat 5 and the fastening screw 7, a locking hook 6 is hinged to one side surface of the presser foot handle 1 through a shaft position screw 11, one side surface of the front end of the locking hook 6 extends inwards to form a hook portion, a clamping hole for clamping the bottom plate pin 4 can be formed by surrounding the first clamping groove 101 and the second clamping groove 601 a; the presser foot handle 1 is further provided with a limiting boss 103 and a limiting pin 9 obliquely arranged at an interval with the limiting boss 103, the locking hook 6 is arranged between the limiting boss 103 and the limiting pin 9, the limiting boss 103 is higher than the limiting pin 9, the limiting pin 9 is arranged behind the shaft position screw 11, an extension arm 603 extends outwards from one side surface of the rear end of the locking hook 6, when the presser foot of the sewing machine normally works, the upper side surface of the rear end of the locking hook 6 abuts against the limiting boss 103, the lower side surface of the rear end of the locking hook 6 abuts against the upper side surface of the limiting seat 5, a clamping groove two 601a of the locking hook 6 abuts against a clamping groove one 101 of the presser foot handle 1 and clamps the base plate pin 4, when the presser foot base plate 2 of the presser foot needs to be replaced, the limiting seat 5 is pushed into the sliding groove 102, the locking hook 6 swings clockwise to the lower side surface of the limiting pin 9, the clamping groove two 601a is far away from the base plate pin 4, the presser foot handle, after the new presser foot base plate 2 is replaced, the base plate pin 4 is located in the first clamping groove 101, the locking hook 6 is anticlockwise swung to the upper side face of the rear end to abut against the limiting projection by the hand pinching extension arm 603, part of the limiting seat 5 is popped out of the sliding groove 102 to abut against the lower side face of the rear end of the locking hook 6 under the action of the first reset spring 8, and the presser foot handle 1 and the locking hook 6 are in a locking state.
Further, as shown in fig. 2 and 4, a first projection 104 and a second projection 105 which are outwardly protruded are respectively arranged in the middle of the upper side and the lower side of the first clamping groove 101 of the presser foot handle 1, and the bottom plate pin 4 is located between the first projection 104 and the second projection 105; a notch 601b penetrating up and down is formed in the middle of the hook part 601 of the locking hook 6, and when the presser foot handle 1 and the locking hook 6 are in a locking state, the first projection 104 and the second projection 105 are embedded into the notch 601b of the hook part 601; the first clamping groove 101 is a semicircular groove, the sectional area of the second clamping groove 601a is larger than that of the first clamping groove 101, the upper side of the first clamping groove 101 is abutted to the upper side of the second clamping groove 601a, the lower side of the second clamping groove 601a is located below the lower side of the first clamping groove 101 and abutted to the front end side face of the presser foot handle 1, and the second clamping groove 601a can be conveniently separated from the bottom plate pin 4.
Further, as shown in fig. 5 and 7, the limiting seat 5 is divided into two parts, namely, a clamping head 501 and a shifting block 502, the clamping interface and the shifting block 502 are integrally formed, the clamping head 501 is located in the sliding groove 102, one end of the shifting block 502 is fixedly connected to one side of the outer peripheral surface of the clamping head 501, and the shifting block 502 extends out of the presser foot handle 1 from one side of the outer peripheral surface of the clamping head 501; the lower side surface of the rear end of the locking hook 6 is abutted against the first plane 604, the clamping joint 501 of the limiting seat 5 is provided with an abutting plane 503 abutted against the first abutting plane 604, and the limiting seat 5 is designed to facilitate shifting of the limiting seat 5 and reduce abrasion of the limiting seat 5.
Further, as shown in fig. 2, 5 and 6, a second return spring 10 is arranged on the limiting convex block, a groove 602 is formed in the upper side face of the rear end of the locking hook 6, one end of the second return spring 10 abuts against the groove 602, and the other end of the second return spring abuts against the limiting convex block, so that the locking hook 6 can swing conveniently, one end of the inner wall of the groove 602 is an arc surface, and the other end of the inner wall of the groove 602 is an inclined surface inclined downwards, and the second return spring 10 can drive the locking hook 6 to swing clockwise in the locking hook 6 and the limiting boss 103.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A presser foot structure in a sewing machine comprises a presser foot handle (1) and a presser foot bottom plate (2); the presser foot base plate is characterized in that a base plate pin (4) transversely penetrates through the middle part of the upper side of the presser foot base plate (2), and a first clamping groove (101) is formed in the front end of the lower part of the presser foot handle (1); a transverse sliding groove (102) is formed in the rear side of the presser foot handle (1), and a limiting seat (5) capable of sliding in a reciprocating mode along the length direction of the sliding groove (102) is arranged in the sliding groove (102); a locking hook (6) is hinged to the side face of one side of the presser foot handle (1), one end of the locking hook (6) is provided with a clamping groove II (601a) corresponding to the clamping groove I (101), and the clamping groove I (101) and the clamping groove II (601a) are encircled to form a clamping hole for clamping the bottom plate pin (4); the lower side surface of the other end of the locking hook (6) can be abutted against the upper side surface of the limiting seat (5); the side surface of the presser foot handle (1) is also provided with a limiting boss (103) and a limiting pin (9) which is positioned obliquely below the limiting boss (103); the rear end of the locking hook (6) is positioned between the limiting boss (103) and the limiting pin (9), and the limiting boss (103) is positioned above the sliding groove (102); the limiting boss (103) is provided with a second reset spring (10) which is vertically arranged, the upper side face of the rear end of the locking hook (6) is provided with a groove (602), one end of the second reset spring (10) is located in the groove (602), and the other end of the second reset spring abuts against the limiting boss (103).
2. Presser foot arrangement in a sewing machine according to claim 1, wherein a fastening screw (7) is screwed to one end of the sliding groove (102), and a first return spring (8) is arranged between the limiting seat (5) and the fastening screw (7).
3. Presser foot arrangement in a sewing machine according to claim 2, wherein the retainer (5) comprises a snap joint (501) and a pusher (502) integrally formed with the snap joint (501), the snap joint (501) being located in the sliding slot (102), the pusher (502) extending out of the presser foot handle (1) from the outer circumferential surface of the snap joint (501) to one side.
4. The presser foot structure in a sewing machine according to claim 1, 2 or 3, wherein a hook portion (601) is provided to extend inward from one side of a front end of said lock hook (6), and said second engaging groove (601a) is provided on an inner wall of said hook portion (601).
5. Presser foot arrangement in a sewing machine according to claim 4, wherein the inner wall of the groove (602) has at one end an arc surface and at the other end an inclined downward slope.
6. The presser foot structure in a sewing machine according to claim 5, wherein a first projection (104) and a second projection (105) protruding outwards are respectively arranged on the presser foot handle (1) at the upper side and the lower side of the first clamping groove (101), and the base plate pin (4) can be arranged between the first projection (104) and the second projection (105); a notch (601b) which penetrates through the locking hook (6) up and down is formed in the middle of a hook part (601), and the first projection (104) and the second projection (105) can be clamped in the notch (601 b).
7. Presser foot arrangement in a sewing machine according to claim 6, wherein an extension arm (603) is provided extending outwards on one side of the locking hook (6) near the rear end of the locking hook (6).
8. Presser foot arrangement in a sewing machine according to claim 7, characterised in that the locking hook (6) is hinged to the presser foot handle (1) by means of an axial screw (11), the axial screw (11) being arranged through the middle of the locking hook (6), the limit pin (9) being located behind the axial screw (11).
9. The presser foot structure in a sewing machine according to claim 8, wherein said first engaging groove (101) is a semicircular groove, an upper end of said second engaging groove (601a) is abutted against an upper end of said first engaging groove (101), and a lower end of said second engaging groove (601a) is positioned below a lower end of said first engaging groove (101) and abutted against a side wall of said presser foot handle (1).
10. Presser foot arrangement in a sewing machine according to claim 9, characterized in that the underside of the rear end of said locking hook (6) has a first abutment plane (604), and the bayonet joint (501) of said retainer block (5) has a second abutment plane (503) which abuts against said first abutment plane (604).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910642245.7A CN110284269B (en) | 2019-07-16 | 2019-07-16 | Presser foot structure in sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910642245.7A CN110284269B (en) | 2019-07-16 | 2019-07-16 | Presser foot structure in sewing machine |
Publications (2)
| Publication Number | Publication Date |
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| CN110284269A CN110284269A (en) | 2019-09-27 |
| CN110284269B true CN110284269B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910642245.7A Active CN110284269B (en) | 2019-07-16 | 2019-07-16 | Presser foot structure in sewing machine |
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| CN (1) | CN110284269B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328597Y2 (en) * | 1973-12-11 | 1978-07-18 | ||
| JPS6016375Y2 (en) * | 1982-08-23 | 1985-05-21 | 晃信精密機械株式会社 | Sewing machine presser foot connection device |
| CN202144550U (en) * | 2011-06-24 | 2012-02-15 | 浙江万维机械有限公司 | Detachable presser foot assembly of sewing machine |
| CN203834140U (en) * | 2014-04-18 | 2014-09-17 | 新杰克缝纫机股份有限公司 | Novel sewing machine presser foot |
| CN204039698U (en) * | 2014-09-25 | 2014-12-24 | 浙江万维机械有限公司 | A kind of detachable presser feet of Sewing machines |
| CN208201306U (en) * | 2018-05-25 | 2018-12-07 | 浙江万维机械有限公司 | Detachable presser feet |
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2019
- 2019-07-16 CN CN201910642245.7A patent/CN110284269B/en active Active
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Address after: 318000 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. |