CN213328131U - Backstitch mechanism of sewing machine - Google Patents

Backstitch mechanism of sewing machine Download PDF

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Publication number
CN213328131U
CN213328131U CN202021342688.9U CN202021342688U CN213328131U CN 213328131 U CN213328131 U CN 213328131U CN 202021342688 U CN202021342688 U CN 202021342688U CN 213328131 U CN213328131 U CN 213328131U
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China
Prior art keywords
reverse
sewing
crank
backstitch
shaft
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Expired - Fee Related
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CN202021342688.9U
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Chinese (zh)
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颜张欣
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Shengjia Sewing Machine Co ltd
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Shengjia Sewing Machine Co ltd
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Abstract

本实用新型属于缝制设备技术领域,涉及一种缝纫机的倒缝机构,其解决了现有缝纫机倒缝时所需的驱动力及能耗大等问题。本倒缝机构包括倒缝轴、针距调节座、倒缝操作杆曲柄和驱动源,倒缝轴转动设置于缝纫机的底座上,且能够绕自身轴线旋转,针距调节座上具有与缝纫机的机壳转动配合的支点,针距调节座能够绕支点摆动,倒缝操作杆曲柄的固定端与倒缝轴固定连接,倒缝操作杆曲柄的活动端与针距调节座活动连接,驱动源与倒缝操作杆曲柄相连接或接触,通过倒缝操作杆曲柄摆动,使针距调节座及倒缝轴运动;或驱动源与针距调节座相连接或接触,通过带动针距调节座摆动,使倒缝操作杆曲柄带动倒缝轴转动。本实用新型可有效降低倒缝时所需的驱动力及能耗。

Figure 202021342688

The utility model belongs to the technical field of sewing equipment, and relates to a reverse sewing mechanism of a sewing machine, which solves the problems of large driving force and energy consumption required for reverse sewing of the existing sewing machine. The reverse sewing mechanism includes a reverse sewing shaft, a stitch adjustment seat, a reverse sewing operation lever crank and a driving source. The reverse sewing shaft is rotatably arranged on the base of the sewing machine and can rotate around its own axis. The fulcrum of the rotation of the machine case, the stitch length adjusting seat can swing around the fulcrum, the fixed end of the reverse stitching lever crank is fixedly connected with the reverse stitching shaft, the movable end of the reverse stitching operating lever crank is movably connected with the stitch length adjusting seat, and the driving source is The crank of the reverse sewing lever is connected or contacted, and the crank of the reverse sewing lever swings to make the stitch adjustment seat and the reverse sewing shaft move; The crank of the reverse sewing lever drives the reverse sewing shaft to rotate. The utility model can effectively reduce the driving force and energy consumption required for reverse sewing.

Figure 202021342688

Description

Backstitch mechanism of sewing machine
Technical Field
The utility model belongs to the technical field of make up equipment, a backstitch mechanism of sewing machine is related to.
Background
When a traditional sewing machine performs reinforcement sewing, the backstitch wrench is pressed down, and the cloth can move in the opposite direction; when the backstitch wrench is loosened, the clothing material can move towards the positive direction, and the clothing material can be reinforced and sewn for several times after being repeated for several times.
In order to improve sewing efficiency and reduce operation intensity, the existing sewing machine gradually adopts an electromagnet or a cylinder to drive to realize automatic backstitch.
The backstitch mechanism of the sewing machine disclosed in the Chinese patent CN208055614U comprises a backstitch shaft, a crank which is tightly held at the periphery of the backstitch shaft and can drive the backstitch shaft to rotate, an air cylinder and an ejector rod which is arranged on an output shaft of the air cylinder, is opposite to the crank and can move along with the output shaft of the air cylinder and push the crank to rotate. When the output shaft of the cylinder extends out, the ejector rod is driven to move synchronously, so that the ejector rod pushes the crank to rotate, the backstitch shaft is driven to rotate synchronously, and the backstitch purpose is achieved.
However, the structure needs a large force to drive, the requirement on the driving force of the cylinder is high, and the energy consumption is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having the above-mentioned problem to current technique, provided a sewing machine's backstitch mechanism, the utility model aims to solve the technical problem that: how to reduce the driving force and energy consumption required by the sewing machine when executing backstitch.
The purpose of the utility model can be realized by the following technical proposal:
a backstitch mechanism of a sewing machine, characterized in that the backstitch mechanism comprises:
the backstitch shaft is rotatably arranged on the base of the sewing machine and can rotate around the axis of the backstitch shaft;
the needle pitch adjusting seat is provided with a fulcrum which is in rotating fit with a shell of the sewing machine, and the needle pitch adjusting seat can swing around the fulcrum;
the fixed end of the backstitch operating rod crank is fixedly connected with the backstitch shaft, and the movable end of the backstitch operating rod crank is movably connected with the needle pitch adjusting seat;
the driving source is connected with or contacted with the backstitch operating rod crank, and can drive the backstitch operating rod crank to swing so as to enable the needle pitch adjusting seat and the backstitch shaft to move; or the driving source is connected with or contacted with the stitch length adjusting seat, can drive the stitch length adjusting seat to swing, and drives the backstitch shaft to rotate through the backstitch operating rod crank.
The working principle is as follows: when the driving source is connected or contacted with the backstitch operating rod crank, the driving source directly drives the backstitch operating rod crank to swing so as to drive the needle pitch adjusting seat and the backstitch shaft to move and realize automatic backstitch; when the driving source is connected or contacted with the stitch length adjusting seat, the driving source can drive the stitch length adjusting seat to swing, and the backstitch shaft is driven to rotate by the backstitch operating rod crank, so that the stitch length adjusting seat and the backstitch shaft move together finally, and automatic backstitch is realized. Compared with the prior art, the driving force and the energy consumption required during backstitch can be effectively reduced.
In the backstitch mechanism of the sewing machine, a sliding groove is formed in the needle pitch adjusting seat, and a connecting part in movable fit with the sliding groove is arranged at the movable end of the backstitch operating rod crank. When the stitch length adjusting seat swings around the pivot of the stitch length adjusting seat, the backstitch operating rod crank is driven to swing around the fixed end of the backstitch operating rod crank through the matching of the sliding groove and the connecting part, and therefore the backstitch shaft is driven to rotate.
In the backstitch mechanism of the sewing machine, as one scheme, an output shaft is arranged on the driving source, and the outer end of the output shaft can be in contact with the movable end of the backstitch operating rod crank to drive the backstitch operating rod crank to swing. The output shaft of the driving source extends out to drive the backstitch operating rod crank to swing, thereby driving the needle pitch adjusting seat and the backstitch shaft to move.
In the backstitch mechanism of a sewing machine described above, an elastic buffer layer is provided at an outer end of the output shaft of the drive source. After the buffer layer is designed, the abrasion and the noise generated when the output shaft is contacted with the backstitch operating rod crank can be reduced.
In the above-mentioned backstitch mechanism of a sewing machine, as another scheme, the driving source with be provided with drive assembly between the gauge needle regulation seat, the driving source can drive through drive assembly the gauge needle regulation seat swing.
In the backstitch mechanism of the sewing machine, the transmission assembly comprises a transmission connecting rod, one end of the transmission connecting rod is hinged with the output shaft of the driving source, and the other end of the transmission connecting rod is hinged with the needle pitch adjusting seat. The output shaft of the driving source extends to drive the transmission connecting rod to move, so that the needle pitch adjusting seat is driven to swing.
In the backstitch mechanism of the sewing machine, a first mounting hole is formed in the output shaft of the driving source, a second mounting hole which is the same as the first mounting hole is formed in one end of the transmission connecting rod, and a first connecting pin is inserted into the first mounting hole and the second mounting hole. The design can realize the hinge joint between the driving source and the transmission connecting rod.
In the backstitch mechanism of the sewing machine, the needle pitch adjusting seat is provided with a boss, the boss is provided with a second connecting pin, and the other end of the transmission connecting rod is provided with a third mounting hole which is in running fit with the second connecting pin. The design can realize the hinging between the transmission connecting rod and the needle pitch adjusting seat.
In the backstitch mechanism of the sewing machine, a fourth mounting hole is formed in the fixed end of the backstitch operating rod crank, and the backstitch shaft penetrates through the fourth mounting hole and is fixed with the fourth mounting hole.
In the above-mentioned backstitch mechanism of a sewing machine, the driving source includes a cylinder or an electromagnet.
Compared with the prior art, the utility model has the advantages of it is following:
this application can effectively reduce required drive power and energy consumption when this sewing machine backstitch.
Drawings
FIG. 1 is a perspective view of the backstitch mechanism according to the first embodiment.
FIG. 2 is a schematic structural diagram of one view angle of the backstitch mechanism according to the first embodiment.
FIG. 3 is a schematic structural view of another perspective of the backstitch mechanism in accordance with one embodiment.
FIG. 4 is a perspective view of the backstitch mechanism according to the second embodiment.
FIG. 5 is an exploded view of the backstitch mechanism of the second embodiment.
Fig. 6 is a schematic structural view of the needle pitch adjusting base according to the second embodiment.
In the figure, 1, a backstitch shaft; 2. backstitch lever cranks; 3. a needle pitch adjusting seat; 4. a drive source; 5. a chute; 6. a connecting portion; 7. an output shaft; 8. a transmission connecting rod; 9. a first mounting hole; 10. a second mounting hole; 11. a first connecting pin; 12. a boss; 13. a second connecting pin; 14. a third mounting hole; 15. and a fourth mounting hole.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 1, 2 and 3, the backstitch mechanism comprises a backstitch shaft 1, a needle pitch adjusting seat 3, a backstitch operating rod crank 2 and a driving source 4, wherein the driving source 4 comprises an air cylinder or an electromagnet, and the driving source 4 is preferably an air cylinder in the embodiment.
The backstitch shaft 1 is rotationally arranged on a base of the sewing machine and can rotate around the axis of the backstitch shaft; the needle pitch adjusting seat 3 is provided with a fulcrum which is in rotating fit with a shell of the sewing machine, and the needle pitch adjusting seat 3 can swing around the fulcrum; the fixed end of the backstitch operating rod crank 2 is fixedly connected with the backstitch shaft 1, and the movable end of the backstitch operating rod crank 2 is movably connected with the needle pitch adjusting seat 3.
In this embodiment, specifically, the fixed end of the backstitch lever crank 2 is provided with a mounting hole four 15, and the backstitch shaft 1 passes through the mounting hole four 15 and is fixed to the mounting hole four 15. The needle pitch adjusting seat 3 is provided with a sliding groove 5, and the movable end of the backstitch operating rod crank 2 is provided with a connecting part 6 which is movably matched with the sliding groove 5.
When the stitch length adjusting seat 3 swings around the pivot of the stitch length adjusting seat, the backstitch operating rod crank 2 is driven to swing around the fixed end of the backstitch operating rod crank through the matching of the sliding groove 5 and the connecting part 6, so that the backstitch shaft 1 is driven to rotate.
It should be noted here that in the present embodiment, preferably, the backstitch operating lever crank 2 and the needle pitch adjusting seat 3 are movably matched with the connecting portion 6 by the sliding groove 5. Other transmission mechanisms, such as link mechanisms, etc., may be used, and further, some changes in the shapes of the sliding grooves 5 and the connecting portions 6, etc., may be made without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
As shown in fig. 1, 2 and 3, in the present embodiment, the driving source 4 is connected to or in contact with the backstitch operating lever crank 2, and can drive the backstitch operating lever crank 2 to swing, so as to move the needle pitch adjusting base 3 and the backstitch shaft 1.
Specifically, the driving source 4 is provided with an output shaft 7, and the outer end of the output shaft 7 can contact with the movable end of the backstitch operating lever crank 2 to drive the backstitch operating lever crank 2 to swing. An output shaft 7 of the driving source 4 extends out to drive the backstitch operating rod crank 2 to swing, so that the needle pitch adjusting seat 3 and the backstitch shaft 1 are driven to move. In order to reduce the abrasion and noise generated when the output shaft 7 contacts the backstitch operating lever crank 2, an elastic buffer layer is arranged at the outer end of the output shaft 7 of the driving source 4, and the elastic buffer layer can be made of hard rubber or the like.
It should be noted that in the present embodiment, the output shaft 7 is in contact with the backstitch operating lever crank 2, and as another scheme, the connection may be realized by a connecting rod, a sliding chute, or the like.
The working principle of the embodiment is as follows: when backstitch is executed, the driving source 4 directly drives the backstitch operating rod crank 2 to swing, so that the needle pitch adjusting seat 3 and the backstitch shaft 1 are driven to move, and automatic backstitch is realized.
Example two:
as shown in fig. 4, 5 and 6, the present embodiment is substantially the same as the first embodiment, except that in the present embodiment, the driving source 4 is connected or contacted with the needle pitch adjusting base 3, and can drive the needle pitch adjusting base 3 to swing, and the backstitch shaft 1 is driven to rotate by the backstitch operating lever crank 2.
Preferably, as shown in fig. 4 and 5, a transmission assembly is disposed between the driving source 4 and the needle pitch adjusting base 3, and the driving source 4 can drive the needle pitch adjusting base 3 to swing through the transmission assembly.
Preferably, the transmission assembly comprises a transmission connecting rod 8, one end of the transmission connecting rod 8 is hinged with the output shaft 7 of the driving source 4, and the other end of the transmission connecting rod 8 is hinged with the needle pitch adjusting seat 3. The output shaft 7 of the driving source 4 extends to drive the transmission connecting rod 8 to move, thereby driving the needle pitch adjusting seat 3 to swing.
Specifically, the output shaft 7 of the driving source 4 is provided with a first mounting hole 9, one end of the transmission link 8 is provided with a second mounting hole 10 corresponding to the first mounting hole 9, and a first connecting pin 11 is inserted into the first mounting hole 9 and the second mounting hole 10. The needle pitch adjusting seat 3 is provided with a boss 12, the boss 12 is provided with a second connecting pin 13, and the other end of the transmission connecting rod 8 is provided with a third mounting hole 14 which is in running fit with the second connecting pin 13. As designed above, the drive source 4 and the transmission link 8 can be hinged together, and the transmission link 8 and the needle gage adjusting base 3 can be hinged together.
It should be noted that, in this embodiment, the driving source 4 is connected to the needle pitch adjusting base 3 by the transmission link 8, and as other schemes, a contact scheme may be adopted between the driving source and the needle pitch adjusting base, and only the needle pitch adjusting base 3 needs to be driven to swing.
The working principle of the embodiment is as follows: the driving source 4 can drive the stitch length adjusting seat 3 to swing, and the backstitch operating rod crank 2 drives the backstitch shaft 1 to rotate, so that the stitch length adjusting seat 3 and the backstitch shaft 1 move together finally, and automatic backstitch is realized.
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 (10)

1.一种缝纫机的倒缝机构,其特征在于,所述倒缝机构包括:1. A reverse sewing mechanism of a sewing machine, wherein the reverse sewing mechanism comprises: 倒缝轴(1),该倒缝轴(1)转动设置于所述缝纫机的底座上,且能够绕自身轴线旋转;a reverse sewing shaft (1), which is rotatably arranged on the base of the sewing machine and can rotate around its own axis; 针距调节座(3),该针距调节座(3)上具有与所述缝纫机的机壳转动配合的支点,所述针距调节座(3)能够绕该支点摆动;a stitch length adjusting seat (3), the stitch length adjusting seat (3) has a fulcrum that is rotatably matched with the casing of the sewing machine, and the stitch length adjusting seat (3) can swing around the fulcrum; 倒缝操作杆曲柄(2),该倒缝操作杆曲柄(2)的固定端与所述倒缝轴(1)固定连接,该倒缝操作杆曲柄(2)的活动端与所述针距调节座(3)活动连接;A reverse sewing operation lever crank (2), the fixed end of the reverse sewing operation lever crank (2) is fixedly connected with the reverse sewing shaft (1), and the movable end of the reverse sewing operation lever crank (2) is connected with the stitch length The adjusting seat (3) is movably connected; 驱动源(4),该驱动源(4)与所述倒缝操作杆曲柄(2)相连接或接触,能够通过带动倒缝操作杆曲柄(2)摆动,使所述针距调节座(3)及倒缝轴(1)运动;或该驱动源(4)与所述针距调节座(3)相连接或接触,能够带动所述针距调节座(3)摆动,并通过所述倒缝操作杆曲柄(2)带动所述倒缝轴(1)转动。A driving source (4), which is connected to or in contact with the crank (2) of the reverse stitching operation lever, and can drive the crank (2) of the reverse stitching operation lever to swing, so that the stitch adjustment seat (3) ) and the reverse sewing shaft (1) move; or the driving source (4) is connected or in contact with the stitch adjustment seat (3), and can drive the stitch adjustment seat (3) to swing, and through the reverse The crank (2) of the sewing lever drives the reverse sewing shaft (1) to rotate. 2.根据权利要求1所述的缝纫机的倒缝机构,其特征在于,所述针距调节座(3)上开设有滑槽(5),所述倒缝操作杆曲柄(2)的活动端设置有与该滑槽(5)活动配合的连接部(6)。2 . The reverse sewing mechanism of a sewing machine according to claim 1 , wherein a chute ( 5 ) is provided on the stitch length adjusting seat ( 3 ), and the movable end of the crank ( 2 ) of the reverse sewing operation lever A connecting part (6) which is movably matched with the chute (5) is provided. 3.根据权利要求1或2所述的缝纫机的倒缝机构,其特征在于,所述驱动源(4)上设置有输出轴(7),所述输出轴(7)的外端能够与所述倒缝操作杆曲柄(2)的活动端相接触,带动倒缝操作杆曲柄(2)摆动。3. The reverse sewing mechanism of the sewing machine according to claim 1 or 2, characterized in that, an output shaft (7) is provided on the drive source (4), and the outer end of the output shaft (7) can be connected with the The movable ends of the crank (2) of the reverse sewing lever are in contact with each other, and the crank (2) of the reverse sewing operation lever is driven to swing. 4.根据权利要求3所述的缝纫机的倒缝机构,其特征在于,所述驱动源(4)的输出轴(7)外端处设置有弹性缓冲层。4 . The reverse sewing mechanism of the sewing machine according to claim 3 , wherein an elastic buffer layer is provided at the outer end of the output shaft ( 7 ) of the driving source ( 4 ). 5 . 5.根据权利要求1或2所述的缝纫机的倒缝机构,其特征在于,所述驱动源(4)与所述针距调节座(3)之间设置有传动组件,所述驱动源(4)能够通过传动组件带动所述针距调节座(3)摆动。5. The reverse sewing mechanism of a sewing machine according to claim 1 or 2, characterized in that, a transmission assembly is provided between the driving source (4) and the stitch length adjusting seat (3), and the driving source (4) 4) The stitch length adjusting seat (3) can be driven to swing by the transmission assembly. 6.根据权利要求5所述的缝纫机的倒缝机构,其特征在于,所述传动组件包括传动连杆(8),所述传动连杆(8)的一端与所述驱动源(4)的输出轴(7)相铰接,所述传动连杆(8)的另一端与所述针距调节座(3)相铰接。6 . The reverse sewing mechanism of the sewing machine according to claim 5 , wherein the transmission assembly comprises a transmission link ( 8 ), and one end of the transmission link ( 8 ) is connected to the drive source ( 4 ). 7 . The output shaft (7) is hingedly connected, and the other end of the transmission link (8) is hingedly connected with the needle distance adjusting seat (3). 7.根据权利要求6所述的缝纫机的倒缝机构,其特征在于,所述驱动源(4)的输出轴(7)上开设有安装孔一(9),所述传动连杆(8)的一端开设有与所述安装孔一(9)相的安装孔二(10),所述安装孔一(9)和安装孔二(10)内插接有连接销一(11)。7 . The reverse sewing mechanism of the sewing machine according to claim 6 , wherein the output shaft ( 7 ) of the driving source ( 4 ) is provided with a mounting hole one ( 9 ), and the transmission link ( 8 ) One end of the mounting hole is provided with a second mounting hole (10) corresponding to the first mounting hole (9), and a connecting pin one (11) is inserted into the first mounting hole (9) and the second mounting hole (10). 8.根据权利要求7所述的缝纫机的倒缝机构,其特征在于,所述针距调节座(3)上设置有凸台(12),所述凸台(12)上设置有连接销二(13),所述传动连杆(8)的另一端开设有与该连接销二(13)转动配合的安装孔三(14)。8 . The reverse sewing mechanism of the sewing machine according to claim 7 , wherein a boss ( 12 ) is provided on the stitch length adjusting seat ( 3 ), and a connecting pin 2 is provided on the boss ( 12 ). 9 . (13), the other end of the transmission connecting rod (8) is provided with a third mounting hole (14) which is rotatably matched with the second connecting pin (13). 9.根据权利要求1或2所述的缝纫机的倒缝机构,其特征在于,所述倒缝操作杆曲柄(2)的固定端开设有安装孔四(15),所述倒缝轴(1)穿过该安装孔四(15)且两者形成固定。9. The reverse sewing mechanism of the sewing machine according to claim 1 or 2, characterized in that, four mounting holes (15) are provided at the fixed end of the crank (2) of the reverse sewing operation lever, and the reverse sewing shaft (1) is provided with four mounting holes (15). ) pass through the mounting hole four (15) and the two are fixed. 10.根据权利要求1或2所述的缝纫机的倒缝机构,其特征在于,所述驱动源(4)包括气缸或电磁铁。10. The reverse sewing mechanism of a sewing machine according to claim 1 or 2, wherein the driving source (4) comprises an air cylinder or an electromagnet.
CN202021342688.9U 2020-07-09 2020-07-09 Backstitch mechanism of sewing machine Expired - Fee Related CN213328131U (en)

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CN202021342688.9U CN213328131U (en) 2020-07-09 2020-07-09 Backstitch mechanism of sewing machine

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Application Number Priority Date Filing Date Title
CN202021342688.9U CN213328131U (en) 2020-07-09 2020-07-09 Backstitch mechanism of sewing machine

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Granted publication date: 20210601