CN215103876U - Device for adjusting presser foot alternating quantity of sewing machine - Google Patents
Device for adjusting presser foot alternating quantity of sewing machine Download PDFInfo
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- CN215103876U CN215103876U CN202120308996.8U CN202120308996U CN215103876U CN 215103876 U CN215103876 U CN 215103876U CN 202120308996 U CN202120308996 U CN 202120308996U CN 215103876 U CN215103876 U CN 215103876U
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Abstract
The utility model provides a sewing machine's presser foot volume of alternating adjusting device belongs to sewing machine equipment technical field. The adjusting device comprises a button, an eccentric adjusting assembly and a clutch assembly, wherein the button can extend into the eccentric adjusting assembly and enables the clutch assembly to be in a clutch state. The adjusting device has the advantages that the adjusting mode of the presser foot alternating quantity is simpler and more convenient, the motor is not needed, the structure is simpler, the convenient use degree of the machine is improved, and the comprehensive competitiveness of the machine on the market is also improved.
Description
Technical Field
The utility model belongs to the technical field of sewing machine equipment, a adjusting device of presser foot volume in turn of sewing machine is related to.
Background
The common thick material flat sewing machine presser foot mechanism on the market at present consists of two parts of a control mechanism of an inner presser foot and an outer presser foot, and the matching of the inner presser foot and the outer presser foot and the synchronous motion of feeding teeth are necessary conditions for the beautiful trace of the thick material flat sewing machine in the sewing range; in the motion process of the matched feeding tooth, a certain height difference can be generated between the two presser feet, namely the presser foot alternating quantity, the presser foot alternating quantity is an important index for measuring the seam thickness performance of the whole machine, namely the larger the presser foot alternating quantity is, the better the seam thickness performance of the machine is, and the more beautiful the seam is in the adjustable range of the height of the presser foot of the whole machine. In the prior art, the presser foot alternative quantity adjusting mode is troublesome, and frequent replacement and adjustment are performed for lathes needing to frequently replace cloth with different thicknesses, so that the production efficiency is low.
The Chinese patent document with the application number of 201811274787.5 discloses an automatic adjusting device for the alternating quantity of upper presser feet of a sewing machine, wherein the sewing machine comprises a presser foot rod and an outer presser foot arranged at the lower end of the presser foot rod, the automatic adjusting device comprises a stepping motor, a swinging shaft and an adjusting crank, the output shaft of the stepping motor is connected with the swinging crank capable of swinging under the driving of the stepping motor, the swinging crank is connected with an adjusting connecting rod capable of adjusting the length, one end of the adjusting connecting rod is hinged with the end part of the swinging crank, and the other end of the adjusting connecting rod is rotatably connected with a limit screw; the adjusting crank is fixedly arranged on the swinging shaft and provided with a waist-shaped hole along the radial direction of the swinging shaft, and the limiting screw is inserted in the waist-shaped hole in a sliding manner; the swinging shaft is connected with the presser bar rod through a presser lifting crank and can drive the presser bar rod to reciprocate up and down; a sewing material thickness detection mechanism is arranged right in front of the outer presser foot.
The automatic regulating device for the presser foot alternating quantity utilizes the stepping motor to be matched with the thickness detection mechanism of cloth, so that the alternating quantity of the inner presser foot and the outer presser foot is automatically controlled. The pressure foot alternating quantity regulating device has the disadvantages that the production cost is relatively high due to the fact that a driving source and a sensor are additionally arranged, and in addition, the pressure foot alternating quantity is not high in regulating frequency, so that the cost is increased, and the market large-scale popularization is not facilitated.
Disclosure of Invention
The utility model discloses to the above-mentioned problem that prior art exists, provide an adjusting device of presser foot volume in turn of sewing machine, the utility model aims to solve the technical problem that: how to conveniently adjust the alternating quantity under the condition of simplifying the structure.
The purpose of the utility model can be realized by the following technical proposal:
the adjusting device is characterized in that the adjusting device comprises a button, an eccentric adjusting assembly and a clutch assembly, and the button can extend into the eccentric adjusting assembly and enable the clutch assembly to be in a clutch state.
In the above device for adjusting the presser foot alternation amount of a sewing machine, the clutch component comprises a ratchet wheel and a pawl, the eccentric adjustment component comprises a needle opening eccentric wheel, a chute eccentric wheel, a swinging slide block and a slide block sleeve, the swinging slide block is fixed on the upper shaft, the swinging slide block is connected with the chute eccentric wheel in a sliding manner, the chute eccentric wheel is provided with a first eccentric shaft, the first eccentric shaft is hinged with the connecting rod, the needle opening eccentric wheel is arranged on the upper shaft, the needle opening eccentric wheel is provided with a second eccentric shaft, the second eccentric shaft is hinged with the slide block sleeve, the slide block sleeve is connected with the chute eccentric wheel in a sliding manner, the ratchet wheel is fixed on the upper shaft, the pawl is connected with the needle opening eccentric wheel in a sliding manner, the needle opening eccentric wheel is provided with a reset piece for driving the ratchet wheel to be kept meshed with the pawl, and the button is arranged on a machine shell of the sewing machine, the button has a button shaft capable of abutting against the pawl.
The upper shaft is arranged in a center hole of a sewing machine shell, a needle rod crank is fixedly arranged at the front end of the upper shaft and used for driving a cloth-pricking and thread-picking mechanism (details are not shown in the figure), a swinging sliding block of the eccentric adjusting component can be fixed with the upper shaft through a screw and keeps a fixed installation angle with the needle rod crank, then the swinging sliding block and an outer sliding groove of the sliding groove eccentric wheel form a sliding pair, the swinging sliding block can flexibly slide up and down, the sliding groove eccentric wheel and a sliding block sleeve form a sliding pair, and the sliding block sleeve can flexibly slide left and right. The eccentric shaft I of the chute eccentric wheel is hinged with the connecting rod, the needle opening eccentric wheel is arranged on the upper shaft, and the eccentric shaft II is hinged with the sliding block sleeve, so that the swinging sliding block, the chute eccentric wheel, the needle opening eccentric wheel and the sliding block sleeve form a whole set of double-sliding-block mechanism together; the needle opening eccentric wheel and the pawl form a sliding pair, the ratchet wheel can be fixedly installed with the upper shaft through a screw, and the pawl and the ratchet wheel enable the inner teeth of the pawl and the outer teeth of the ratchet wheel to be always kept in a meshed state through a reset piece (not shown in the figure) so as to transmit torque. The connecting rod is articulated mutually with the swing crank, and swing crank and presser foot lifting shaft can hold tightly fixedly through the screw, and presser foot lifting shaft installs in the axle sleeve at the casing back and can carry out radial nimble rotation, therefore eccentric adjusting part constitutes four-bar linkage (crank rocker mechanism) with the swing crank jointly.
When the manual presser foot alternate quantity adjustment is needed, the button is manually and slowly pressed, then the upper shaft is slowly rotated, the button shaft can extend into the needle opening eccentric wheel and then moves downwards to enable the pawl to slide downwards and be separated from the ratchet wheel, the clutch state is generated, and then the needle opening eccentric wheel is kept still in the radial direction through the limit of the tail end of the button shaft.
When the swinging slide block rotates, the length of the AB rod in the double-slide block mechanism can be changed, but the length of the AB rod only changes in the AB linear direction, so that the actual eccentric length AB of the eccentric adjusting assembly and the installation angle of the needle bar crank 8 are always set values of the process and cannot be changed, and the time matching relationship between the cloth feeding mechanism and the cloth pricking and thread taking-up mechanism driven by the needle bar crank cannot be influenced; when the length of the AB rod is changed, the length of a crank (actual eccentric length AB) in a crank rocker mechanism consisting of the eccentric adjusting component and the swing crank is changed, so that the swing amplitude of the rocker (swing crank) is changed, and finally the upper and lower amplitudes of the outer presser foot are influenced to change the alternating quantity of the integral inner presser foot and the integral outer presser foot.
This adjusting device makes the adjustment mode of presser foot volume in turn simpler and more convenient, compares with step motor's technical scheme of adjusting, need not use the motor, and the structure is simpler, and the cost is lower, has not only promoted the convenient degree of use of machine, has still promoted the comprehensive competitiveness of machine on market.
In the presser foot alternating quantity adjusting device of the sewing machine, the first outer chute is formed in the chute eccentric wheel, and the swing sliding block is connected to the first outer chute in a sliding manner and is attached to the inner wall of the first outer chute.
The swing sliding block and the sliding groove eccentric wheel form a sliding pair, the outer sliding groove I is arranged on the outer sliding groove I and is attached to the inner wall of the outer sliding groove I, and the structure can improve the stability of the swing sliding block during sliding.
In the presser foot alternating quantity adjusting device of the sewing machine, the chute eccentric wheel is provided with the inner chute, the inner wall of the inner chute is provided with the first sliding guide surface, the two sides of the slide block sleeve are respectively provided with the second sliding guide surface, and the sliding guide surfaces are attached to the first sliding guide surfaces.
The sliding pair is formed by the sliding block sleeve and the sliding groove eccentric wheel, and the first sliding guide surface and the second sliding guide surface form a guide structure, so that the stability of the sliding block sleeve during sliding can be well improved.
In the presser foot alternating quantity adjusting device of the sewing machine, the needle opening eccentric wheel is provided with the second outer sliding groove, and the pawl is connected to the second outer sliding groove in a sliding manner and is attached to the inner wall of the second outer sliding groove. The needle opening eccentric wheel and the pawl form a sliding pair, and the pawl is attached to the inner wall of the outer sliding groove II, so that the pawl is not prone to shaking in the sliding process, and the stability is good.
In the above device for adjusting the presser foot alternating quantity of the sewing machine, a hand wheel is fixed at one end of the upper shaft, the hand wheel is circular, and scale marks are arranged on the circumferential surface of the hand wheel. The upper shaft can be conveniently rotated through the hand wheel, the convenience of operation is improved, and the scale marks on the hand wheel play a reference role, so that an operator can better determine the rotating angle.
In the above device for adjusting presser foot alternation amount of a sewing machine, the adjusting device further comprises a main motor, and an output shaft of the main motor is connected with the upper shaft. The upper shaft can be driven to rotate by the main motor, so that the operation is more convenient.
In the presser foot alternation amount adjusting device of the sewing machine, the button is provided with a guide pin, the button shaft is sleeved with a spring, the bottom of the button shaft is fixed with a retainer ring, the upper end part and the lower end part of the spring are respectively connected to the upper half part and the retainer ring of the button shaft, the connecting rod is provided with a guide hole for the insertion of the guide pin, and the edge of the needle punching eccentric wheel is provided with an insertion groove for the passage of the button shaft.
When the button is manually and slowly pressed down, the hand wheel is slowly rotated to drive the needle opening eccentric wheel to rotate, after the hand wheel is rotated to a certain angle, the button shaft just can stretch into the slot of the needle opening eccentric wheel, the button shaft moves downwards again to enable the pawl to slide downwards along the second sliding groove of the needle opening eccentric wheel, the pawl is separated from the ratchet wheel to generate a clutch state, the tail end of the button shaft is limited, the needle opening eccentric wheel keeps still in the radial direction all the time, when the adjustment of the alternating quantity of the presser feet is finished, the button is loosened, the pawl and the ratchet wheel can automatically reset under the action of the spring, and the ratchet wheel and the pawl can be conveniently restored to the meshing state to transmit torque.
The guide pin and the guide hole play roles in positioning and guiding, so that the button has better stability in the up-and-down moving process.
In the above device for adjusting presser foot alternation amount of a sewing machine, the return member is a torsion spring or a compression spring.
Compared with the prior art, the utility model has the advantages as follows:
1. this adjusting device makes the adjustment mode of presser foot volume in turn simpler and more convenient, compares with step motor's technical scheme of adjusting, need not use the motor, and the structure is simpler, and the cost is lower, has not only promoted the convenient degree of use of machine, has still promoted the comprehensive competitiveness of machine on market.
2. In the adjusting device, the pawl and the ratchet wheel can automatically reset under the action of the spring, and the ratchet wheel and the pawl are conveniently restored to a meshing state to transmit torque.
Drawings
FIG. 1 is a schematic view of the present adjustment device connection;
FIG. 2 is a schematic view of the eccentric adjustment assembly;
FIG. 3 is an exploded view of the eccentric adjustment assembly and the clutch assembly;
FIG. 4 is a schematic structural diagram of a slider eccentric;
FIG. 5 is a schematic view of the structure of the button;
fig. 6 is a schematic diagram of presser foot alternating amount adjustment.
In the figure, 1 is the axis; 2 presser foot lifting shaft; 3, swinging a crank; 4 needle bar crank; 5, a connecting rod; 6, a button; 7 an eccentric adjustment assembly; 8, opening needle eccentric wheel; 9, ratchet wheel; 10 a pawl; 11 chute eccentric wheel; 12 oscillating the slider; 13, a sliding block sleeve; 14, eccentric shaft I; 15, eccentric shaft II; 16 button shafts; 17 a first outer chute; 18 inner chutes; 19 a first sliding guide surface; 20 a sliding guide surface II; 21, a second outer chute; 22 a handwheel; 23 a main motor; 24 a guide pin; 25 springs; 26 a retainer ring; 27 a pilot hole; 28, a slot; 29 inner presser feet; 30 outer presser foot.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1-3, the sewing machine comprises an upper shaft 1 and a presser foot lifting shaft 2, a swing crank 3 is fixed on the presser foot lifting shaft 2, a connecting rod 5 is hinged on the swing crank 3, the adjusting device comprises a button 6, an eccentric adjusting component 7 and a clutch component, and the button 6 can extend into the eccentric adjusting component 7 and enable the clutch component to be in a clutch state.
As shown in fig. 3, in this example, the clutch assembly comprises a ratchet 9 and a pawl 10, the eccentric adjustment assembly 7 comprises a needle opening eccentric 8, a chute eccentric 11, the sewing machine comprises a swing sliding block 12 and a sliding block sleeve 13, wherein the swing sliding block 12 is fixed on an upper shaft 1, the swing sliding block 12 is connected with a chute eccentric wheel 11 in a sliding mode, the chute eccentric wheel 11 is provided with a first eccentric shaft 14, the first eccentric shaft 14 is hinged with a connecting rod 5, a needle opening eccentric wheel 8 is arranged on the upper shaft 1, the needle opening eccentric wheel 8 is provided with a second eccentric shaft 15, the second eccentric shaft 15 is hinged with the sliding block sleeve 13, the sliding block sleeve 13 is connected on the chute eccentric wheel 11 in a sliding mode, a ratchet wheel 9 is fixed on the upper shaft 1, a pawl 10 is connected with the needle opening eccentric wheel 8 in a sliding mode, a reset piece for driving the ratchet wheel 9 to be meshed with the pawl 10 is arranged on the needle opening eccentric wheel 8, a button 6 is arranged on a shell of the sewing machine, and the button 6 is provided with a button shaft 16 capable of abutting against the pawl 10. The return member may be a torsion spring or a compression spring.
The upper shaft 1 is arranged in a central hole of a sewing machine shell, a needle rod crank 4 is fixedly arranged at the front end of the upper shaft 1 and used for driving a cloth-pricking and thread-picking mechanism (details are not shown in the figure), a swing sliding block 12 of an eccentric adjusting component 7 can be fixed with the upper shaft 1 through a screw and keeps a fixed installation angle with the needle rod crank 4, then the swing sliding block 12 and an outer sliding groove of a sliding groove eccentric wheel 11 form a sliding pair, the swing sliding block 12 can flexibly slide up and down, the sliding groove eccentric wheel 11 and a sliding block sleeve 13 form a sliding pair, and the sliding block sleeve 13 can flexibly slide left and right. The eccentric shaft I14 of the chute eccentric wheel 11 is hinged with the connecting rod 5, the needle opening eccentric wheel 8 is arranged on the upper shaft 1, and the eccentric shaft II 15 is hinged with the sliding block sleeve 13, so that the swinging sliding block 12, the chute eccentric wheel 11, the needle opening eccentric wheel 8 and the sliding block sleeve 13 form a whole set of double-sliding-block mechanism together; the needle opening eccentric wheel 8 and the pawl 10 form a sliding pair, the ratchet wheel 9 can be fixedly installed with the upper shaft 1 through a screw, and the pawl 10 and the ratchet wheel 9 enable the internal teeth of the pawl 10 and the external teeth of the ratchet wheel 9 to be always kept in a meshed state through a resetting piece (not shown in the figure) so as to transmit torque. The connecting rod 5 is hinged with the swing crank 3, the swing crank 3 and the presser foot lifting shaft 2 can be tightly held and fixed through screws, the presser foot lifting shaft 2 is arranged in a shaft sleeve on the back surface of the machine shell and can rotate radially and flexibly, and therefore the eccentric adjusting component 7 and the swing crank 3 jointly form a four-connecting-rod mechanism (a crank rocker mechanism).
When the manual presser foot alternate quantity adjustment is needed, the button 6 is manually and slowly pressed, then the upper shaft 1 is slowly rotated, the button shaft 16 can extend into the needle opening eccentric wheel 8 and then moves downwards to enable the pawl 10 to slide downwards and be disengaged from the ratchet wheel 9, a clutch state is generated, and then the needle opening eccentric wheel 8 is kept still in the radial direction through the limit of the tail end of the button shaft 16.
As shown in fig. 6, when the swing slider 12 rotates, the length of the AB rod in the double slider mechanism changes, but the length of the AB rod changes only in the direction of the AB straight line, so that the installation angle between the actual eccentric length AB of the eccentric adjusting assembly 7 and the needle bar crank 48 is always the set value of the process and will not change, and therefore the time matching relationship between the cloth feeding mechanism and the needle bar crank 4 driven needle-bar thread-picking mechanism will not be affected; when the length of the AB rod is changed, the length of a crank (actual eccentric length AB) in a crank rocker mechanism consisting of the eccentric adjusting component 7 and the swinging crank 3 is changed, so that the swinging amplitude of the rocker (swinging crank 3) is changed, and finally the upper and lower amplitudes of the outer presser foot 30 are influenced to change the alternating quantity of the integral inner presser foot 29 and the integral outer presser foot 30.
As shown in fig. 2-4, in the present embodiment, the sliding groove eccentric wheel 11 is provided with an outer sliding groove one 17, and the swing sliding block 12 is slidably connected to the outer sliding groove one 17 and abuts against an inner wall of the outer sliding groove one 17.
The swing sliding block 12 and the chute eccentric wheel 11 form a sliding pair, the swing sliding block 12 is attached to the inner wall of the outer chute I17, and the structure can improve the stability of the swing sliding block 12 during sliding.
As shown in fig. 3, in this embodiment, the eccentric cam 11 of the sliding slot is provided with an inner sliding slot 18, the inner wall of the inner sliding slot 18 is provided with two first sliding guide surfaces 19, and two sides of the sliding block sleeve 13 are respectively provided with two second sliding guide surfaces 20, which are abutted to the first sliding guide surfaces 19.
The sliding pair is formed by the sliding block sleeve 13 and the sliding groove eccentric wheel 11, and the first sliding guide surface 19 and the second sliding guide surface 20 form a guide structure, so that the stability of the sliding block sleeve 13 during sliding can be well improved.
In the embodiment, as shown in fig. 2 and 3, the second outer sliding groove 21 is formed on the needle opening eccentric wheel 8, and the pawl 10 is slidably connected to the second outer sliding groove 21 and abuts against the inner wall of the second outer sliding groove 21. The needle opening eccentric wheel 8 and the pawl 10 form a sliding pair, and the pawl 10 is attached to the inner wall of the outer sliding groove II 21, so that the pawl 10 is not easy to shake in the sliding process, and the stability is good.
As shown in fig. 1, in the present embodiment, a hand wheel 22 is fixed at one end of the upper shaft 1, the hand wheel 22 is circular, and scale marks are provided on the circumferential surface of the hand wheel 22. The upper shaft 1 can be conveniently rotated through the hand wheel 22, the operation convenience is improved, and the scale marks on the hand wheel 22 play a reference role, so that an operator can better determine the rotating angle.
As shown in fig. 1, in this embodiment, the adjusting device further includes a main motor 23, and an output shaft of the main motor 23 is connected to the upper shaft 1. The main motor 23 can drive the upper shaft 1 to rotate, and the operation is more convenient.
As shown in fig. 1, 3 and 5, in this embodiment, the button 6 has a guide pin 24, the button shaft 16 is sleeved with a spring 25, a retaining ring 26 is fixed at the bottom of the button shaft 16, the upper end and the lower end of the spring 25 are respectively connected to the upper half part of the button shaft 16 and the retaining ring 26, the connecting rod 5 is provided with a guide hole 27 for the guide pin 24 to be inserted, and the edge of the needle opening eccentric wheel 8 is provided with a slot 28 for the button shaft 16 to pass through.
When the button 6 is manually and slowly pressed, the hand wheel 22 is slowly rotated to drive the needle opening eccentric wheel 8 to rotate, after a certain angle is reached, the button shaft 16 just can extend into the slot 28 of the needle opening eccentric wheel 8, the button shaft 16 moves downwards again to enable the pawl 10 to slide downwards along the second sliding groove of the needle opening eccentric wheel 8, the pawl 10 is separated from the ratchet wheel 9 to generate a clutch state, the needle opening eccentric wheel 8 is kept still in the radial direction through the tail end limit of the shaft of the button shaft 16, when the adjustment of the alternating amount of the presser feet is finished, the button 6 is released, the pawl 10 and the ratchet wheel 9 can automatically reset under the action of the spring 25 at the moment, and the ratchet wheel 9 and the pawl 10 can conveniently restore to the meshing state to transmit torque.
The guide pin 24 and the guide hole 27 play a role in positioning and guiding, so that the button 6 has better stability during the up-and-down movement.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The adjusting device for the presser foot alternation amount of the sewing machine comprises an upper shaft (1) and a presser foot lifting shaft (2), wherein a swinging crank (3) is fixed on the presser foot lifting shaft (2), and a connecting rod (5) is hinged on the swinging crank (3), and is characterized by comprising a button (6), an eccentric adjusting component (7) and a clutch component, wherein the button (6) can extend into the eccentric adjusting component (7) and enables the clutch component to be in a clutch state.
2. The presser foot alternation quantity adjusting device of sewing machine according to claim 1, characterized in that said clutch assembly comprises a ratchet wheel (9) and a pawl (10), said eccentric adjusting assembly (7) comprises a needle opening eccentric (8), a chute eccentric (11), a swinging slider (12) and a slider sleeve (13), said swinging slider (12) is fixed on said upper shaft (1), said swinging slider (12) is slidably connected with said chute eccentric (11), said chute eccentric (11) has an eccentric shaft one (14), said eccentric shaft one (14) is hinged with said connecting rod (5), said needle opening eccentric (8) is arranged on said upper shaft (1), said needle opening eccentric (8) has an eccentric shaft two (15), said eccentric shaft two (15) is hinged with said slider sleeve (13), said slider sleeve (13) is slidably connected with said chute eccentric (11), the sewing machine is characterized in that the ratchet wheel (9) is fixed on the upper shaft (1), the pawl (10) is in sliding connection with the needle opening eccentric wheel (8), the needle opening eccentric wheel (8) is provided with a reset piece which drives the ratchet wheel (9) to be meshed with the pawl (10), the button (6) is arranged on a machine shell of the sewing machine, and the button (6) is provided with a button shaft (16) which can be abutted against the pawl (10).
3. The presser foot alternation amount adjusting device of sewing machine as claimed in claim 2, wherein an outer sliding groove I (17) is opened on the sliding groove eccentric wheel (11), and the swing slider (12) is slidably connected to the outer sliding groove I (17) and abuts against the inner wall of the outer sliding groove I (17).
4. The presser foot alternation amount adjusting device of a sewing machine as claimed in claim 2, wherein the chute eccentric wheel (11) is provided with an inner chute (18), the inner wall of the inner chute (18) is provided with two first sliding guide surfaces (19), two sides of the slider sleeve (13) are respectively provided with a second sliding guide surface (20), and the sliding guide surfaces are abutted with the first sliding guide surfaces (19).
5. The presser foot alternation amount adjusting device of sewing machine as claimed in claim 2, wherein the needle opening eccentric wheel (8) is provided with a second outer sliding groove (21), and the pawl (10) is slidably connected to the second outer sliding groove (21) and abuts against the inner wall of the second outer sliding groove (21).
6. The presser foot alternation amount adjusting device of a sewing machine as claimed in claim 1, wherein a hand wheel (22) is fixed at one end of the upper shaft (1), the hand wheel (22) is circular, and scale lines are arranged on the peripheral surface of the hand wheel (22).
7. The presser foot alternation amount adjusting device of sewing machine as claimed in claim 1, further comprising a main motor (23), wherein an output shaft of said main motor (23) is connected with said upper shaft (1).
8. The presser foot alternation amount adjusting device of a sewing machine according to any one of claims 2-5, characterized in that the button (6) has a guide pin (24), a spring (25) is sleeved on the button shaft (16), a retainer ring (26) is fixed at the bottom of the button shaft (16), the upper end and the lower end of the spring (25) are respectively connected on the upper half part and the retainer ring (26) of the button shaft (16), the connecting rod (5) is provided with a guide hole (27) for the insertion of the guide pin (24), and the edge of the needle opening eccentric wheel (8) is provided with a slot (28) for the passage of the button shaft (16).
9. The presser foot alternation amount adjusting device of sewing machine as claimed in claim 2, wherein the return member is a torsion spring or a compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308996.8U CN215103876U (en) | 2021-02-03 | 2021-02-03 | Device for adjusting presser foot alternating quantity of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308996.8U CN215103876U (en) | 2021-02-03 | 2021-02-03 | Device for adjusting presser foot alternating quantity of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215103876U true CN215103876U (en) | 2021-12-10 |
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ID=79334039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120308996.8U Active CN215103876U (en) | 2021-02-03 | 2021-02-03 | Device for adjusting presser foot alternating quantity of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215103876U (en) |
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2021
- 2021-02-03 CN CN202120308996.8U patent/CN215103876U/en active Active
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Address after: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: JACK SEWING MACHINE Co.,Ltd. |