The pressing device of the baby carrier machine and the sewing method between the baby carrier strap and the button.

Abstract

This invention discloses a pressing device for a baby carrier machine and a method for sewing baby carriers and buttons. The pressing device includes a feeding plate, a liftable mounting base, a left and right linear drive mechanism, a snap fastener plate, a presser foot, and a pressure plate. The snap fastener plate has a stepped groove, the stepped surface of which allows buttons to slide into from back to front. The presser foot is located above the stepped groove. The left and right linear drive mechanism drives the pressure plate to move in the left and right direction, and the rear end of the pressure plate can press down on the end of the baby carrier. The pressure plate presses the end of the baby carrier onto the button, preventing the end of the baby carrier from lifting or shifting, and ensuring the quality of longitudinal sewing. The pressure plate is away from the presser foot and away from the stepped groove, ensuring smooth transverse sewing and sewing quality. The method for sewing baby carriers and buttons includes the following steps: button feeding, baby carrier feeding, pressing down on the end of the baby carrier and the baby carrier, longitudinal sewing, loosening the end of the baby carrier and the baby carrier, and transverse sewing.

Description

Technical Field

[0001] This invention relates to the field of garment manufacturing equipment technology, and in particular to a pressing device for a baby carrier machine and a method for sewing baby carriers and buttons together. Background Technology

[0002] The bra straps are used to lift the bra body. Due to individual differences, the length of the straps needs to be adjusted. One end of the strap is sewn with a T-shaped button. The original method of connecting the button and the strap was to wrap the end of the strap around the middle vertical bar of the T-shape and then sew it to the main body of the strap. However, the steps of wrapping the end of the strap and sewing are cumbersome, the equipment is complex, and the sewing efficiency is low. Therefore, at present, the method of directly sewing the end of the strap to the button is adopted. The button has two elongated holes, and there are at least two intermediate holes on the vertical bar between the two elongated holes. All intermediate holes are distributed longitudinally. The sewing thread passes between two adjacent intermediate holes to complete the longitudinal sewing, and the sewing thread passes between the other elongated hole and each intermediate hole to complete the transverse sewing. However, the current pressing device is no longer suitable for the new method of connecting the button and the strap. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a pressing device for a shoulder strap machine, which is suitable for directly sewing the ends of the shoulder straps and buttons together, ensuring the quality of the sewing.

[0004] The present invention also proposes a method for sewing a shoulder strap and a button using the pressing device of the aforementioned shoulder strap machine.

[0005] According to a first aspect of the present invention, a pressing device for a shoulder strap machine includes a feed plate, a mounting base, left and right linear drive mechanisms, a buckle plate, a presser foot, and a pressure plate. The feed plate is used to connect to a sewing machine. The mounting base is vertically and elliptically connected to the sewing machine. The left and right linear drive mechanisms and the presser foot are both disposed on the mounting base. The buckle plate is slidably disposed on the feed plate in the front-rear direction. The rear end face of the buckle plate is provided with a stepped groove, which extends vertically through the buckle plate. The stepped groove is wider at the top and narrower at the bottom and has a stepped surface, which allows a button to slide into the stepped groove from back to front. The presser foot is located above the stepped groove and is used to press down on the shoulder strap and the button. The front end of the pressure plate is connected to the output end of the left and right linear drive mechanisms, which drive the pressure plate to move in the left-right direction. The rear end of the pressure plate can press down on the end of the shoulder strap to press the end of the shoulder strap into the area between another elongated hole and the middle hole on the button.

[0006] It has at least the following beneficial effects:

[0007] Both the pressure plate and the presser foot descend. The pressure plate presses the end of the strap against the area between the other elongated hole and the middle hole on the button, preventing the end of the strap from lifting or shifting, ensuring the stitching thread can pass through the strap smoothly, and guaranteeing the quality of the longitudinal stitching. Then, the pressure plate moves away from below the presser foot and above the stepped slot, exposing the end of the strap and the other elongated hole. At this time, the end of the strap is still attached to the vertical guard of the button, ensuring the quality of the transverse stitching.

[0008] According to some embodiments of the present invention, the rear end of the pressure plate is provided with inclined downward pressure teeth, the pressure teeth can extend into the upper end of the stepped slot, and the pressure teeth can be located above the area between another elongated hole on the button and the intermediate hole, pressing down on the end of the strap.

[0009] According to some embodiments of the present invention, the presser foot is provided with a needle hole, and the lower end of the left or right side wall of the needle hole is provided with a bypass groove, through which the presser tooth extends into the stepped slot.

[0010] According to some embodiments of the present invention, the lower surface of the rear end of the presser foot is provided with a relief groove communicating with the needle hole, and the relief groove is provided for a pusher for pushing the button to extend into.

[0011] According to some embodiments of the present invention, the fabric feeding plate is connected to a retaining plate, the retaining plate extending into the stepped slot to block and position the button.

[0012] According to some embodiments of the present invention, the lower surfaces of the buckle plate and the fabric feeding plate are flush, the lower surface of the buckle plate is provided with a sliding groove communicating with the lower end of the stepped groove, the stop plate is movably inserted through the sliding groove, and the rear end of the stop plate is provided with a blocking part, the blocking part extending into the upper end of the front end of the stepped groove.

[0013] According to some embodiments of the present invention, a front and rear drive mechanism is further included, the output end of which is connected to the front end of the buckle plate, the buckle plate is connected to the fabric feeding plate through a sliding mechanism, and the front and rear position of the buckle plate on the sliding mechanism is adjustable.

[0014] According to some embodiments of the present invention, the output end of the left and right linear drive mechanism is connected to the front end of the pressure plate through an adapter plate, and the front and rear positions of the pressure plate on the adapter plate are adjustable.

[0015] According to some embodiments of the present invention, the mounting base includes a connecting block and a mounting plate connected together. The connecting block is provided with a connecting part for connecting with the sewing machine and a clamping part for clamping the front end of the presser foot. The mounting plate is connected to the left and right linear drive mechanisms.

[0016] According to a second aspect embodiment of the present invention, the method for sewing a shoulder strap and a button, using the pressing device of the shoulder strap machine according to the first aspect embodiment of the present invention, includes the following steps:

[0017] The button is fed, the snap plate moves back so that the stepped snap slot is aligned with the button, and then the button is pushed from back to front into the stepped snap slot so that the button is in the sewing position of the sewing machine;

[0018] The strap is fed by covering the strap over an elongated hole and a longitudinal guard of the button;

[0019] Press down the end of the shoulder strap and the shoulder strap. The left and right linear drive mechanism drives the pressure plate to move above the stepped slot. Both the pressure plate and the pressure foot descend. The pressure plate presses the end of the shoulder strap into the area between the other elongated hole and the middle hole on the button. The pressure foot presses the shoulder strap onto the button.

[0020] The longitudinal stitching is performed by the sewing mechanism at the sewing station of the sewing machine to complete the longitudinal stitching of the strap and the button.

[0021] Loosen the end of the shoulder strap and the shoulder strap, and both the pressure plate and the pressure foot rise. The left and right linear drive mechanism drives the pressure plate away from below the pressure foot and above the stepped slot to expose the end of the shoulder strap and another elongated hole.

[0022] The sewing mechanism completes the lateral stitching of the shoulder strap and the button.

[0023] It has at least the following beneficial effects:

[0024] The method of sewing the straps and buttons has all the beneficial effects of the pressing device of the strap machine described in the above embodiments, and will not be repeated here.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the button structure according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the button and strap according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the pressing device of the shoulder strap machine according to an embodiment of the present invention;

[0030] Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0031] Figure 5 This is a schematic diagram of the buckle plate of the pressing device of the shoulder strap machine according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the pressing device of the shoulder strap machine after the mounting base is hidden, according to an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the mounting base, left and right linear drive mechanisms, and presser feet of the pressing device of the shoulder strap machine according to an embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of the structure of the pressing device of the shoulder strap machine after concealing the mounting base and the pressing plate in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the left and right linear drive mechanism, adapter plate and pressure plate of the pressing device of the shoulder strap machine according to an embodiment of the present invention;

[0036] Icon labels:

[0037] Button 1, shoulder strap 2, fabric feeding plate 100, sliding mechanism 110, first elongated hole 111, buffer pad 120, limiting plate 130, mounting base 200, connecting block 210, mounting plate 220, left and right linear drive mechanism 300, adapter plate 310, buckle plate 400, stepped buckle groove 410, sliding groove 420, presser foot 500, needle hole 510, bypass groove 520, clearance groove 530, pressure plate 600, pressure tooth 610, second elongated hole 620, stop plate 700, blocking part 710. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0040] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0041] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0042] like Figure 1 and Figure 2 This is a method of directly sewing the ends of the straps and buttons together.

[0043] Reference Figures 3 to 5 This invention discloses a pressing device for a shoulder strap machine, including a feed plate 100, a mounting base 200, left and right linear drive mechanisms 300, a buckle plate 400, a presser foot 500, and a pressing plate 600. The feed plate 100 is used to connect to a sewing machine; the mounting base 200 is vertically and vertically connected to the sewing machine; the left and right linear drive mechanisms 300 and the presser foot 500 are both mounted on the mounting base 200; the buckle plate 400 is slidably mounted on the feed plate 100 in the front-back direction, and the rear end face of the buckle plate 400 is provided with a stepped groove 410 through which the buckle passes. The plate 400 has a stepped slot 410 that is wider at the top and narrower at the bottom and has a stepped surface, allowing the button 1 to slide into the stepped slot 410 from back to front; the presser foot 500 is located above the stepped slot 410 and is used to press down the shoulder strap 2 and the button 1; the front end of the pressure plate 600 is connected to the output end of the left and right linear drive mechanism 300, which is used to drive the pressure plate 600 to move in the left and right direction, and the rear end of the pressure plate 600 can press down on the end of the shoulder strap 2 to press the end of the shoulder strap 2 into the area between the other elongated hole and the middle hole on the button 1.

[0044] This invention also discloses a method for sewing a shoulder strap and a button together, including the pressing device of the aforementioned shoulder strap machine, with the following steps:

[0045] When the button is fed, the snap plate 400 moves backward so that the stepped slot 410 is aligned with the button 1. Then the button 1 is pushed from back to front into the stepped slot 410 so that the button 1 is in the sewing position of the sewing machine.

[0046] The shoulder strap is fed by covering the long hole and the longitudinal guard of the button 1 with the shoulder strap 2.

[0047] Press down the end of the shoulder strap and the shoulder strap. The left and right linear drive mechanism 300 drives the pressure plate 600 to move above the stepped slot 410. The pressure plate 600 and the pressure foot 500 both descend. The pressure plate 600 presses the end of the shoulder strap 2 into the area between the other long hole and the middle hole on the button 1. The pressure foot 500 presses the shoulder strap 2 onto the button 1.

[0048] Longitudinal stitching: The sewing mechanism at the sewing station of the sewing machine completes the longitudinal stitching of the strap 2 and the button 1;

[0049] Loosen the end of the shoulder strap and the shoulder strap, and both the pressure plate 600 and the pressure foot 500 rise. The left and right linear drive mechanism 300 drives the pressure plate 600 away from the pressure foot 500 and the step slot 410 to expose the end of the shoulder strap 2 and another elongated hole.

[0050] The sewing mechanism completes the horizontal stitching of the shoulder strap 2 and button 1.

[0051] The method of sewing the straps and buttons includes the use of the pressing device of the strap machine. The pressing device of the strap machine works with the sewing machine to complete the connection between the straps and buttons. The pressing device of the strap machine can be used to directly sew the ends of the straps and buttons together.

[0052] Since the snap fastener plate 400 can move in the front-to-back direction, when the snap fastener plate 400 moves backward, its rear end can be aligned with the button feeding mechanism. The button and the rear end port of the stepped slot 410 are directly opposite each other. The pusher of the button feeding mechanism can then push the button from back to front into the stepped surface of the stepped slot 410 until the button reaches the sewing station and is aligned with the sewing mechanism of the sewing machine. The snap fastener plate 400 ensures the accuracy of button feeding and avoids missing or misaligned buttons.

[0053] Both the presser plate 600 and the presser foot 500 descend. The presser plate 600 presses the end of the shoulder strap 2 into the area between the other elongated hole and the middle hole on the button 1, preventing the end of the shoulder strap 2 from lifting or shifting, and ensuring that the suture thread can pass through the shoulder strap 2, thus ensuring the smooth progress and quality of the longitudinal sewing. Then, the presser plate 600 moves away from below the presser foot 500 and above the stepped slot 410, exposing the end of the shoulder strap 2 and the other elongated hole. At this time, the end of the shoulder strap 2 is still attached to the longitudinal guard of the button 1, ensuring the smooth progress and quality of the transverse sewing.

[0054] See Figure 4 and Figure 6 In some embodiments, the rear end of the pressure plate 600 is provided with a downwardly inclined pressure tooth 610, which can extend into the upper end of the stepped slot 410 and is located above the area between another elongated hole and the middle hole on the button 1.

[0055] When the pressure tooth 610 extends into the upper end of the stepped slot 410, and the pressure tooth 610 is located above the area between the other elongated hole and the middle hole on the button 1, the mounting base 200 can carry the left and right linear drive mechanism 300 and the pressure plate 600 down. The pressure plate 600 moves down and presses the end of the strap 2 onto the button 1, thereby positioning the button 1 in the fixed position of the stepped slot 410 and the sewing station.

[0056] Since the pressure plate 600 is above the feed plate 100, the stepped groove 410 has a certain depth, and the button 1 is inserted into the stepped groove 410. In fact, when the pressure plate 600 descends, it is blocked by the feed plate 100 and cannot move to a position lower than the upper end of the stepped groove 410. In order to ensure that the pressure plate 600 can press down on the end of the strap 2 on the button 1, the downward-sloping pressure tooth 610 is lower than the height of the pressure plate 600. The pressure tooth 610 can be lower than the upper end of the stepped groove 410, thereby ensuring that the pressure tooth 610 can press the end of the strap 2 on the button 1.

[0057] See Figure 4 and Figure 7 In some embodiments, the presser foot 500 is provided with a needle hole 510, through which the sewing needle of the sewing mechanism can pass in a vertical direction to complete the sewing of the button 1 and the strap 2. A bypass groove 520 is provided at the lower end of the left or right side wall of the needle hole 510. The pressing tooth 610 passes through the bypass groove 520 to enter below the needle hole 510 and into the stepped groove 410. The pressing tooth 610 extends into the stepped groove 410 through the bypass groove 520, preventing interference between the pressing tooth 610 and the presser foot 500.

[0058] Specifically, the bypass groove 520 is opened on the lower surface of the left or right side wall of the needle hole 510, and the bypass groove 520 penetrates the left or right side wall of the needle hole 510, so that the needle hole 510 is connected to the area to the left or right of the presser foot 500.

[0059] In some embodiments, the lower surface of the rear end of the presser foot 500 is provided with a relief groove 530 that communicates with the needle hole 510. The relief groove 530 can be inserted by a pusher for pushing the button 1, so as to achieve smooth positioning and feeding of the button 1.

[0060] Specifically, the groove of the clearance groove 530 is opened on the lower surface of the rear side wall of the needle hole 510, and the clearance groove 530 penetrates the rear side wall of the needle hole 510, so that the needle hole 510 is connected to the area behind the presser foot 500.

[0061] Before the presser foot 500 moves down and presses onto the shoulder strap 2, the pusher can remain pushing against the rear end face of the button 1 to prevent the button 1 from accidentally shifting backward and causing rearward misalignment, thus ensuring the accuracy of the button 1's positioning. When the presser foot 500 presses onto the shoulder strap 2, the pusher enters the clearance groove 530 to prevent interference between the presser foot 500 and the pusher.

[0062] In some embodiments, the fabric feeding plate 100 is connected to a retaining plate 700, which extends into the stepped slot 410. When the button 1 enters the stepped slot 410 and abuts against the retaining plate 700, the button 1 is stopped by the retaining plate 700, thus completing the positioning of the button 1.

[0063] See Figure 4 and Figure 8 In some embodiments, the rear end of the buckle plate 700 is provided with a blocking part 710, which extends into the upper end of the front end of the stepped slot 410. The blocking part 710 can abut against the front end face of the button 1, thereby limiting the forward movement position of the button 1.

[0064] See Figure 5 The lower surfaces of the buckle plate 400 and the fabric feeding plate 100 are flush. The lower surface of the buckle plate 400 is provided with a sliding groove 420 that communicates with the lower end of the stepped buckle groove 410. The retaining plate 700 is movably inserted through the sliding groove 420. The sliding groove 420 serves to accommodate the retaining plate 700 and prevent the retaining plate 700 from being exposed outside the buckle plate 400 and interfering with other components.

[0065] The fabric feeding plate 100 is connected to the stop plate 700, and the stop plate 700 is fixed in position, thereby positioning the button 1 at the sewing station. The snap fastener plate 400 moves relative to the stop plate 700 in the front-back direction, which is equivalent to the stop plate 700 moving in the front-back direction within the slide groove 420, which has a guiding function.

[0066] See Figure 3 and Figure 6 In some embodiments, the pressing device further includes a front and rear drive mechanism, the output end of which is connected to the front end of the buckle plate 400. The front and rear drive mechanism drives the buckle plate 400 to move in the front-rear direction. The buckle plate 400 is connected to the feed plate 100 via a sliding mechanism 110, so that when the buckle plate 400 slides on the feed plate 100, the resistance experienced by the buckle plate 400 is relatively small and it is guided by the sliding mechanism 110. The front and rear position of the buckle plate 400 on the sliding mechanism 110 is adjustable so as to adjust the stepped groove 410 on the buckle plate 400 to align with the sewing station in the front and rear positions.

[0067] Furthermore, the sliding mechanism 110 includes a sliding rail and a slider that cooperate with each other. The sliding rail is horizontally arranged and its length direction is the front-to-back direction. One of the sliding rail and the slider is connected to the fabric feeding plate 100, and the other is connected to the buckle plate 400.

[0068] In this embodiment, the slide rail and the slider are respectively connected to the feed plate 100 and the buckle plate 400. The front end of the buckle plate 400 or the slider is provided with a first elongated hole 111. The length direction of the first elongated hole 111 is the front-back direction. A first fastener is inserted through the first elongated hole 111. Loosening the first fastener can adjust the front-back position of the buckle plate 400. The first fastener slides relative to the buckle plate 400 in the first elongated hole 111 along the length direction of the first elongated hole 111. When the buckle plate 400 is in a suitable front-back position, tightening the first fastener can fix the buckle plate 400 and the slider together.

[0069] See Figure 3 , Figure 6 and Figure 9 In some embodiments, the output end of the left and right linear drive mechanism 300 is connected to the front end of the pressure plate 600 through the adapter plate 310. The front and rear positions of the pressure plate 600 on the adapter plate 310 are adjustable. By adjusting the front and rear positions of the pressure plate 600, the rear end of the pressure plate 600 can be pressed into the strap 2 in the stepped slot 410.

[0070] It is understandable that by adjusting the front and rear positions of the pressure plate 600, the pressure tooth 610 and the bypass groove 520 can be set relative to each other, and the pressure tooth 610 can extend into the stepped slot 410 through the bypass groove 520.

[0071] The front end of the adapter plate 310 or the pressure plate 600 is provided with a second elongated hole 620. The length direction of the second elongated hole 620 is the front-to-back direction. A second fastener is inserted through the second elongated hole 620. Loosening the second fastener can adjust the front-to-back position of the pressure plate 600. The second fastener slides relative to the pressure plate 600 in the second elongated hole 620 along the length direction of the second elongated hole 620. When the pressure plate 600 is in a suitable front-to-back position, tightening the second fastener can fix the pressure plate 600 and the adapter plate 310 together.

[0072] In this embodiment, the front end of the pressure plate 600 is provided with a vertical ear plate, and the second elongated hole 620 is provided on the ear plate. The pressure plate 600 is set horizontally.

[0073] See Figure 3 and Figure 7In some embodiments, the mounting base 200 includes a connecting block 210 and a mounting plate 220 connected together. The connecting block 210 is provided with a connecting part for connecting to a sewing machine and a clamping part for clamping the front end of the presser foot 500. The mounting plate 220 is connected to the left and right linear drive mechanisms 300. The presser foot 500 and the left and right linear drive mechanisms 300 are connected to the sewing machine through the connecting block 210, and the connecting block 210 drives the presser foot 500 and the left and right linear drive mechanisms 300 to move up and down synchronously.

[0074] The connecting part is vertically arranged and has a first connecting hole for connecting to the sewing machine. The clamping part includes a main body and a side plate. The side plate is located on the right side of the main body, and there is a gap between the right side of the main body and the left side of the side plate. The side plate can undergo a certain elastic deformation. The front end of the presser foot 500 is columnar and is located in the gap between the main body and the side plate. The main body and the side plate are connected by a third fastener. When the third fastener is tightened, the side plate undergoes elastic deformation, and the gap between the main body and the side plate decreases, so that the main body and the side plate clamp the front end of the presser foot 500. When the third fastener is loosened, the side plate returns to its original position, the gap between the main body and the side plate returns to its original state, and the front end of the presser foot 500 can move again in the front-back direction in the gap between the main body and the side plate.

[0075] The output end of the left and right linear drive mechanism 300 faces left. The output end of the left and right linear drive mechanism 300 is connected to the front end of the pressure plate 600 through the adapter plate 310. The rear end of the buckle plate 400 is provided with a left half and a right half. A stepped groove 410 is formed between the rear ends of the left half and the right half. The pressure plate 600 is located above the left half. The right half allows the shoulder strap 2 to cross over so that the end of the shoulder strap 2 can be placed in the area between the other elongated hole and the middle hole on the button 1. The fabric feeding plate 100 is provided with a fabric feeding part, which is located to the right of the rear end of the buckle plate 400.

[0076] In this embodiment, the left and right linear drive mechanism 300 is a cylinder. The ear plate and the second fastener are connected to the left side of the adapter plate 310.

[0077] See Figure 3 and Figure 6 The feed plate 100 is provided with a limiting plate 130. The front end face of the limiting plate 130 is provided with a buffer pad 120. The buffer pad 120 is set opposite to the rear end face of the slider. The buffer pad 120 is set to avoid collision between the slider and the limiting plate 130. The limiting plate 130 plays the role of limiting the slider and the buckle plate 400 to move backward, so as to avoid the buckle plate 400 moving backward too much and causing interference between the buckle plate 400 and other components.

[0078] The limiting plate 130 is provided with a third elongated hole, the length direction of the third elongated hole is the front-to-back direction, the third elongated hole is inserted into the third fastener, the front-to-back position of the limiting plate 130 can be adjusted by loosening and tightening the third fastener, thereby adjusting the limiting point of the buckle plate 400 moving backward.

[0079] The rear end of the buffer pad 120 is provided with a connecting post, and the limiting plate 130 is provided with a second connecting hole. The connecting post passes through the second connecting hole, and the connecting post and the second connecting hole are connected by an interference fit, thereby fixing the buffer pad 120 on the limiting plate 130.

[0080] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A pressing device for a shoulder strap machine, characterized in that, include: Feed plate, used to connect to the sewing machine; The mounting base is vertically and adjustablely connected to the sewing machine; A left and right linear drive mechanism is provided on the mounting base; A snap fastener plate is slidably disposed on the fabric feeding plate in the front-to-back direction. The rear end face of the snap fastener plate is provided with a stepped slot. The stepped slot extends through the snap fastener plate from top to bottom. The stepped slot is wider at the top and narrower at the bottom and has a stepped surface. The stepped surface allows a button to slide into the stepped slot from back to front. A presser foot is provided on the mounting base, the presser foot is located above the stepped slot, and the presser foot is used to press down the shoulder strap and the button; The pressure plate is connected at its front end to the output end of the left and right linear drive mechanism, which is used to drive the pressure plate to move in the left and right direction. The rear end of the pressure plate can press down on the end of the shoulder strap to press the end of the shoulder strap into the area between the other elongated hole and the middle hole on the button. The rear end of the pressure plate is provided with inclined downward pressure teeth. The pressure teeth can extend into the upper end of the stepped slot, and the pressure teeth can be located above the area between the other elongated hole on the button and the middle hole, pressing down on the end of the strap. The presser foot is provided with a needle hole, and the lower end of the left or right side wall of the needle hole is provided with a bypass groove. The presser tooth extends into the stepped slot through the bypass groove. The lower surface of the rear end of the presser foot is provided with a relief groove that communicates with the needle hole, and the relief groove can be inserted by a pusher for pushing the button.

2. The pressing device of the shoulder strap machine according to claim 1, characterized in that: The fabric feeding plate is connected to a retaining plate, which extends into the stepped slot to block and position the button.

3. The pressing device of the shoulder strap machine according to claim 2, characterized in that: The lower surfaces of the buckle plate and the fabric feeding plate are flush. The lower surface of the buckle plate is provided with a sliding groove that communicates with the lower end of the stepped groove. The stop plate is movably inserted through the sliding groove, and the rear end of the stop plate is provided with a blocking part that extends into the upper end of the front end of the stepped groove.

4. The pressing device of the shoulder strap machine according to claim 1, characterized in that: It also includes a front and rear drive mechanism, the output end of which is connected to the front end of the buckle plate. The buckle plate is connected to the fabric feeding plate through a sliding mechanism, and the front and rear position of the buckle plate on the sliding mechanism is adjustable.

5. The pressing device of the shoulder strap machine according to claim 1, characterized in that: The output end of the left and right linear drive mechanism is connected to the front end of the pressure plate through an adapter plate, and the front and rear positions of the pressure plate on the adapter plate are adjustable.

6. The pressing device of the shoulder strap machine according to claim 1, characterized in that: The mounting base includes a connecting block and a mounting plate connected together. The connecting block is provided with a connecting part for connecting with the sewing machine and a clamping part for clamping the front end of the presser foot. The mounting plate is connected to the left and right linear drive mechanism.

7. A method for sewing the straps and buttons together, characterized in that: The pressing device of the strap machine according to any one of claims 1 to 6 includes the following steps: The button is fed, the snap plate moves back so that the stepped snap slot is aligned with the button, and then the button is pushed from back to front into the stepped snap slot so that the button is in the sewing position of the sewing machine; The strap is fed by covering the strap over an elongated hole and a longitudinal guard of the button; Press down the end of the shoulder strap and the shoulder strap. The left and right linear drive mechanism drives the pressure plate to move above the stepped slot. Both the pressure plate and the pressure foot descend. The pressure plate presses the end of the shoulder strap into the area between the other elongated hole and the middle hole on the button. The pressure foot presses the shoulder strap onto the button. The longitudinal stitching is performed by the sewing mechanism at the sewing station of the sewing machine to complete the longitudinal stitching of the strap and the button. Loosen the end of the shoulder strap and the shoulder strap, and both the pressure plate and the pressure foot rise. The left and right linear drive mechanism drives the pressure plate away from below the pressure foot and above the stepped slot to expose the end of the shoulder strap and another elongated hole. The sewing mechanism completes the lateral stitching of the shoulder strap and the button.

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