Sewing material clamping assembly and template machine

Abstract

The sewing material clamping assembly comprises a large presser foot base and a needle hole plate, the large presser foot base is assembled at the bottom of a large presser foot mounting plate of the template machine, a first through hole penetrating in the first direction is formed in the middle of the large presser foot base, and two large presser foot pressing plates arranged in the second direction at intervals are connected to the bottom of the large presser foot base; an elastic piece is connected between the large presser foot seat and the large presser foot pressing plate and is used for driving the large presser foot pressing plate to press the templates on the two sides of the machine needle in the second direction; the pinhole plate comprises a pinhole plate body connected with a needle plate of the template machine, a first boss arranged at the top of the pinhole plate body and a second boss arranged at the top of the first boss, the first boss is provided with a second through hole penetrating through the pinhole plate body and spaced from the second boss in the third direction, and the second through hole and the first through hole are coaxially arranged; a needle of the template machine moves in the first direction to sew the fabric; the problem that the cloth is inwards shrunk due to the fact that sewing stitches are bent and bottom threads are too tight can be solved.

Description

Technical Field

[0001] This invention relates to the field of template machine technology, and in particular to a sewing material clamping assembly and a template machine. Background Technology

[0002] Currently, template sewing machines on the market generally have poor flatness after sewing. The existing technology to solve the problem of poor flatness is to attach horsehair interfacing to the template. When sewing, the horsehair interfacing provides some support for the seam when sewing the fabric, which increases the amount of surface thread and forms thread loops. The thread loops will tighten when the fabric is filled with down later. The horsehair interfacing has a certain effect on the flatness of the fabric.

[0003] However, this solution did not significantly improve the bottom thread tension. After detaching from the template, the bottom thread did not form a loop, resulting in excessively tight overall thread tension. Investigations into the root causes of uneven fabric after sewing revealed that the main reason was the displacement of the yarns constituting the fabric (e.g., the lining) after needle punching. Furthermore, the excessively tight bottom thread caused the fabric to wrinkle inwards, leading to unevenness. Additionally, the horsehair interfacing itself has a certain thickness; the area where the interfacing is attached to the template is thicker than the area where it is not, creating a height difference on both sides of the seam. This caused the fabric to shift relative to the template during sewing, resulting in bent stitches and increased wrinkling.

[0004] Therefore, how to avoid the problem of bent stitches and fabric shrinking inward due to excessively tight bottom thread is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a sewing material clamping assembly and template machine that can avoid the problems of bent sewing stitches and fabric shrinkage caused by excessively tight bottom thread.

[0006] To achieve the above objectives, the present invention provides a sewing fabric clamping assembly, comprising:

[0007] The large presser foot seat is assembled on the bottom of the large presser foot mounting plate of the template machine. A first through hole is provided in the middle along the first direction. Two large presser foot pressure plates are connected to the bottom of the large presser foot seat at intervals in the second direction. An elastic element is connected between the large presser foot seat and the large presser foot pressure plates.

[0008] The pinhole plate includes a pinhole plate body for connecting with a pin plate of a template machine, a first protrusion disposed on the top of the pinhole plate body, and a second protrusion disposed on the top of the first protrusion. The first protrusion has a second through hole that penetrates the pinhole plate body and is spaced apart from the second protrusion in a third direction. The second through hole and the first through hole are coaxially arranged.

[0009] The second through hole and the first through hole are used to allow the needle of the template machine to move along the first direction to sew the fabric located in the template. The elastic element is used to drive the large presser foot plate away from the large presser foot seat in the first direction to press the template located on both sides of the needle in the second direction.

[0010] The first direction, the second direction, and the third direction are perpendicular to each other.

[0011] In one possible implementation, the second boss has a guide slope on the side facing upwards towards the second through hole. The bottom of the guide slope is connected to the top plane of the first boss, which is used to guide the fabric from the second through hole to the top of the second boss. The guide slope has a first groove, and the top plane of the first boss has a second groove that connects the first groove and the second through hole. The first groove and the second groove are used to form a clearance space to avoid the bottom thread sewn onto the fabric.

[0012] In one possible implementation, the top plane of the pinhole plate body, the top plane of the first boss, and the top plane of the second boss are all perpendicular to the first direction, and the angle between the guide slope and the top plane of the first boss is 120°~170°.

[0013] In one possible implementation, the cross-sectional dimension of the first boss perpendicular to the first direction gradually decreases in the direction away from the pinhole plate body; the cross-sectional dimension of the second boss perpendicular to the first direction gradually decreases in the direction away from the first boss.

[0014] In one possible implementation, the bottom of the large presser foot seat has two third grooves, which are located on both sides of the first through hole in the third direction. The top of the large presser foot plate is provided with two third protrusions. The two third protrusions of the same large presser foot plate are spaced apart in the third direction to correspond to the third grooves. The top surface of the third groove is provided with several fourth grooves. One end of the elastic member is located in the fourth groove, and the other end of the elastic member extends out of the fourth groove and is connected to the third protrusion.

[0015] In one possible implementation, the top of the third protrusion extends into the third groove, and the top of the third protrusion has extensions extending in the second direction on both sides. The bottom of the large pressure foot is connected to a limiting plate, which has a limiting hole for the third protrusion to move in the first direction. The width of the limiting hole in the second direction is less than the distance between the opposite sides of the two extensions on the same third protrusion.

[0016] In one possible implementation, there are two limiting plates, which are respectively located on both sides of the first through hole in the first direction. The limiting plate includes a fixing part extending in the second direction and a limiting part connected to the fixing part and extending in the third direction. A limiting hole is formed between adjacent limiting parts on the same limiting plate.

[0017] In one possible implementation, the fixing part is provided with a plurality of first fixing holes extending along a first direction, the first fixing holes being arranged sequentially along a second direction, the large pressure foot base being provided with second fixing holes corresponding to the first fixing holes, the second fixing holes being located on opposite sides of the two third grooves, and the second fixing member being connected to the corresponding first fixing holes and second fixing holes, so that the limiting plate is fixed relative to the large pressure foot base.

[0018] In one possible implementation, the third protrusion has first inclined surfaces on both sides in the third direction, and the first inclined surfaces are located at the top of the third protrusion. The third groove has a second inclined surface on at least one inner wall in the third direction, and the second inclined surface is located at the end of the third groove away from the fourth groove, so that the end of the third groove away from the fourth groove has a flared structure. The angle between the first inclined surface and the first direction and the angle between the second inclined surface and the first direction are equal, so that at least one first inclined surface can fit against the second inclined surface for guiding the top of the third protrusion into the third groove.

[0019] In one possible implementation, the distance between the axis of the second through hole and any of the large pressure foot plates in the second direction is 4-6 mm; the first through hole includes two plane inner walls spaced apart in the third direction, the plane inner walls being perpendicular to the third direction, and the distance between the axis of the second through hole and any of the plane inner walls in the third direction is 17-19 mm.

[0020] Based on the above, this application also provides a template machine, including a sewing material clamping assembly as described in any of the above claims.

[0021] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0022] Specifically, a large presser foot base is simultaneously connected to two large presser foot plates spaced apart in the second direction. One of the two large presser foot plates is used to press the template located on one side of the needle in the second direction, and the other large presser foot plate is used to press the template located on the other side of the needle in the second direction. The large presser foot plates and the large presser foot base are connected by elastic elements. The actions of the two large presser foot plates are separated. When either large presser foot plate contacts the template, the connected elastic element is compressed. When the template has a height difference, only the amount of expansion and contraction of the elastic element is different, but the large presser foot plates can press against the template under the action of the elastic element. This can avoid the displacement of the fabric relative to the template during the sewing process caused by the height difference in the prior art, which causes the large presser foot to only press the template on the side of the needle. This avoids the bending of the sewing stitch and reduces the shrinkage rate. During the sewing process, after the previous sewing position on the fabric is sewn at the second through hole, the fabric moves towards the second protrusion in a third direction and is supported by the second protrusion. At the same time, the next sewing position on the fabric waits for the needle to sew at the second through hole. The second protrusion lifts up the sewn position of the fabric, which enhances the strength of the fabric and prevents insufficient bobbin thread due to fabric deformation during the take-up process. This increases the amount of bobbin thread, reducing the tension of the bobbin thread in the same length of seam, thereby reducing the degree of inward shrinkage of the fabric and improving the flatness of the fabric. This design can avoid the problems of crooked stitches and inward shrinkage of the fabric caused by excessively tight bobbin thread. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the sewing material clamping assembly provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the sewing material clamping assembly provided in an embodiment of the present invention from another perspective.

[0026] Figure 3 for Figure 1 Top view;

[0027] Figure 4 This is a schematic diagram of the structure of the pinhole plate provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the pinhole plate provided in an embodiment of the present invention from another perspective;

[0029] Figure 6 This is a cross-sectional view of the pinhole plate provided in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of a large pressure foot seat provided in an embodiment of the present invention, wherein only one large pressure foot plate is installed;

[0031] Figure 8 This is a schematic diagram of the structure of the large pressure foot seat without the large pressure foot plate installed, provided in an embodiment of the present invention.

[0032] Figure 9 This is a schematic diagram of the structure of the large pressure foot seat provided in an embodiment of the present invention, which has only one limiting plate installed.

[0033] Figure 10 This is a schematic diagram of the structure of the large pressure foot seat without the limiting plate provided in the embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the structure of the limiting plate provided in an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the structure of the large pressure foot plate provided in an embodiment of the present invention.

[0036] in:

[0037] 100 - Large pressure foot base, 110 - First through hole, 120 - Third groove, 121 - Second inclined surface, 130 - Fourth groove, 140 - Second fixing hole, 150 - Mounting hole;

[0038] 200 - Large presser foot plate, 210 - Third protrusion, 211 - First inclined surface, 212 - Fifth groove, 220 - Extension body;

[0039] 300 - Elastic component;

[0040] 400-Limiting plate, 410-Limiting hole, 420-Fixing part, 421-First fixing hole, 430-Limiting part;

[0041] 500 - Pinhole plate body, 510 - First connecting hole;

[0042] 600 - First boss, 610 - Second through hole, 620 - Second groove;

[0043] 700 - Second boss, 710 - Guide slope, 720 - First groove. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner" and "outer", etc., indicate the orientation or positional relationship 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 position 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 limitations of this invention.

[0047] The purpose of this invention is to provide a sewing material clamping assembly and template machine that can avoid the problems of bent sewing stitches and fabric shrinkage caused by excessively tight bottom thread.

[0048] It should be noted that in this embodiment, the X direction in the attached figure is defined as the first direction, the Y direction as the second direction, and the Z direction as the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0049] Please see Figures 1 to 12The purpose of this invention is to provide a sewing fabric clamping assembly, including a large presser foot base 100 and a needle plate. The large presser foot base 100 is assembled on the bottom of the large presser foot mounting plate of a template machine, and has a first through hole 110 in the middle along a first direction. The bottom of the large presser foot base 100 is connected to two large presser foot pressure plates 200 spaced apart in a second direction, and an elastic element 300 connects the large presser foot base 100 and the large presser foot pressure plates 200. The needle plate includes a needle plate body 500 for connecting with the needle plate of the template machine, and a first boss 60 disposed on the top of the needle plate body 500. 0. A second protrusion 700 is disposed on the top of the first protrusion 600. The first protrusion 600 has a second through hole 610 that passes through the needle plate body 500 and is spaced apart from the second protrusion 700 in a third direction. The second through hole 610 and the first through hole 110 are coaxially arranged. The second through hole 610 and the first through hole 110 are used for the needle of the template machine to move in a first direction to sew the fabric located in the template. The elastic element 300 is used to drive the large presser foot plate 200 away from the large presser foot seat 100 in the first direction to press the template located on both sides of the needle in the second direction. The distance between the axis of the second through hole 610 and the large presser foot plate 200 in the second direction can be set to 4-6mm. Preferably, the axis of the second through hole 610 is located in the middle of the two large presser foot plates 200 in the second direction to avoid the large presser foot plate 200 leaving too far a line. The first through hole 110 includes two planar inner walls spaced apart in the third direction. The planar inner walls are perpendicular to the third direction. The distance between the axis of the second through hole 610 and the planar inner walls in the third direction can be set to 17-19mm. Preferably, the axis of the second through hole 610 is located in the middle of the two planar inner walls in the third direction. This ensures that during sewing, the pressure of the large presser foot 200 is evenly distributed on the fabric centered on the sewing position through the action of the pressing template.

[0050] It should be noted that the large pressure foot base 100 is provided with a mounting hole 150, which is a through hole or a threaded hole. The large pressure foot mounting plate is also provided with a corresponding through hole or threaded hole. The large pressure foot base 100 and the large pressure foot mounting plate can be relatively fixed by the insertion and fixing of the first fixing member. The large pressure foot base 100 can move synchronously under the movement of the large pressure foot mounting plate. For example, the large pressure foot mounting plate drives the large pressure foot base 100 to move synchronously in the first direction, that is, the large pressure foot mounting plate drives the large pressure foot base 100 to move synchronously up or down. The first fixing member can be, but is not limited to, screws or pins. A template is a fixing tool that can be placed on a sewing table to fix the fabric. The template makes the fabric flat and easy to sew. The first through hole 110 is used for the needle of the template machine to move along the first direction to sew the fabric located in the template. The first through hole 110 provides clearance for the movement of the needle. The needle moves up and down in the first direction without horizontal displacement. The large presser foot 100 also does not move horizontally. Only the template drives the fabric to move synchronously along the preset trajectory. A horsehair lining is pasted inside the template. The horsehair lining provides a certain support for the sewing thread, resulting in an increase in the amount of thread and the formation of thread loops.

[0051] The gap between the two large presser foot plates 200 also provides clearance for the movement of the needle in the first direction. The elastic element 300 is used to press the two large presser foot plates 200 against the templates located on both sides of the needle in the second direction when the large presser foot mounting plate moves the large presser foot seat 100 downward, so as to restrict the relative movement of the templates and the fabric located in the templates. The bottom edge of the large presser foot plate 200 is rounded, and the large presser foot plate 200 is provided with an inclined side connected to the bottom edge. The inclined side is inclined relative to the horizontal plane, so that the cross-sectional dimension of the large presser foot plate 200 perpendicular to the first direction decreases along the direction close to the template, which can avoid the template and the bottom of the large presser foot plate 200 from abutting or rubbing, which would cause damage to the template.

[0052] It is understood that the pinhole plate body 500 is provided with at least two first connecting holes 510, and the first connecting holes 510 are symmetrically arranged about the center of the pinhole plate body 500. The needle plate is provided with second connecting holes corresponding to the first connecting holes 510. By means of connectors passing through the corresponding first connecting holes 510 and second connecting holes, the pinhole plate body 500 is assembled onto the needle plate, and then installed together with the needle plate onto the lower rotating device of the template machine. The lower rotating device can drive the needle plate and the pinhole plate body 500 to rotate. In this embodiment, it is preferable to provide four first connecting holes 510. The four first connecting holes 510 are symmetrically arranged about the center of the pinhole plate body 500, which helps to make the first connecting holes 510 bear force evenly and avoid local stress concentration caused by eccentric load. The connectors can be, but are not limited to, screws or pins.

[0053] It should be noted that the axial direction of the second through hole 610 is parallel to the first direction. When the needle pierces the fabric along the axial direction of the second through hole 610, the circumferential wall of the second through hole 610 can support the fabric, that is, the first boss 600 supports the fabric, which can prevent the fabric from collapsing and causing defects such as skipped stitches, greatly improving work efficiency. The positions to be sewn on the fabric can be divided into the previous position and the next position according to the sewing sequence. After the previous position is sewn, the next position is sewn. The position of the previous position waiting to be sewn at the second through hole 610 is the same as the position of the next position waiting to be sewn at the second through hole 610. The direction from the second through hole 610 to the second boss 700 in the third direction is the direction of fabric movement, and the direction from the second boss 700 to the second through hole 610 in the third direction is the sewing advance direction.

[0054] Two large presser foot plates 200, spaced apart in the second direction, are simultaneously connected to a large presser foot base 100. One of the two large presser foot plates 200 is used to press the template located on one side of the needle in the second direction, and the other large presser foot plate 200 is used to press the template located on the other side of the needle in the second direction. The large presser foot plates 200 and the large presser foot base 100 are connected by elastic elements 300. The actions of the two large presser foot plates 200 are separated. When either large presser foot plate 200 contacts the template, it can compress the connected elastic element 300. When the template has a height difference, only the expansion and contraction of the elastic element 300 is different. However, under the action of the elastic element 300, the large presser foot plates 200 can press against the template. This can avoid the displacement of the fabric relative to the template during sewing caused by the height difference in the prior art, which causes the large presser foot to only press the template on the side of the needle. This can prevent the stitches from bending and reduce the shrinkage rate. During the sewing process, after the previous sewing position on the fabric is sewn at the second through hole 610, the fabric moves towards the second protrusion 700 in a third direction and is supported by the second protrusion 700. At the same time, the next sewing position on the fabric waits for the needle to sew at the second through hole 610. The second protrusion 700 lifts up the sewn position of the fabric, which enhances the strength of the fabric and prevents insufficient bottom thread due to fabric deformation during the take-up process. This increases the amount of bottom thread and reduces the tension of the bottom thread in the same length of seam, thereby reducing the degree of inward shrinkage of the fabric and improving the flatness of the fabric. This design can avoid the problems of crooked stitches and inward shrinkage of the fabric caused by excessively tight bottom thread.

[0055] In one possible implementation, the second boss 700 has a guide slope 710 on the side facing upwards towards the second through hole 610. The bottom of the guide slope 710 is connected to the top plane of the first boss 600, guiding the fabric from the second through hole 610 to the top of the second boss 700. The guide slope 710 has a first groove 720, and the top plane of the first boss 600 has a second groove 620 connecting the first groove 720 and the second through hole 610. The first groove 720 and the second groove 620 form a clearance space to avoid the bottom thread of the sewing onto the fabric. After the fabric is supported by the first boss 600 and sewn at the second through hole 610, it moves towards the second boss 700 under the guidance of the guide slope 710.

[0056] In one possible implementation, the top plane of the pinhole plate body 500, the top plane of the first boss 600, and the top plane of the second boss 700 are all perpendicular to the first direction, that is, the top plane of the pinhole plate body 500, the top plane of the first boss 600, and the top plane of the second boss 700 are parallel to each other. When the perforated plate body 500 is in a horizontal state, the top planes of the perforated plate body 500, the first boss 600, and the second boss 700 are all horizontal. The height of the top plane of the first boss 600 is higher than the height of the top plane of the perforated plate body 500, and the height of the top plane of the second boss 700 is higher than the height of the top plane of the first boss 600. The first boss 600 can lift the fabric, enhancing its strength, and the second boss 700 can lift the fabric after it has been sewn by the needle, further enhancing its strength. The top plane of the second boss 700 should have a certain area to improve its support effect on the fabric. The axis of the second through hole 610 is perpendicular to the top plane of the first boss 600, so that when the top plane of the first boss 600 is horizontal, the axis of the second through hole 610 extends along the height direction, allowing the needle to move up and down along the axis of the second through hole 610. The thickness of the second boss 700 in the first direction can be set to 1.0-1.5 times the thickness of the first boss 600 in the first direction, which can effectively reduce the tension of the bottom thread and improve the flatness of the fabric.

[0057] The top plane of the second protrusion 700 should have a certain width in the fabric movement direction, such that the top plane of the second protrusion 700 includes a proximal end that is closer to the second through hole 610 and a distal end that is farther from the second through hole 610. When the next sewing position of the fabric moves to the second through hole 610, the previous sewing position of the fabric can move to between the proximal and distal ends of the shim, providing a certain degree of flexibility. The distance between the previous sewing position and the next sewing position is the stitch length. The stitch length can be set according to actual needs. In some special application scenarios, a smaller stitch length is required. In this case, even if the previous sewing position cannot move directly to the top plane of the second protrusion 700 in a single movement after being sewn by the needle, the second protrusion 700 can still enhance the strength of the fabric by lifting the fabric adjacent to the previous sewing position, preventing insufficient bottom thread due to fabric deformation during the take-up process.

[0058] In one possible implementation, the angle between the guide ramp 710 and the top plane of the first boss 600 is 120° to 170°. The guide ramp 710 is set at an obtuse angle to the top plane of the first boss 600. When the top plane of the first boss 600 is horizontal, the guide ramp 710 is inclined relative to the horizontal and vertical directions to guide the fabric on the top plane of the first boss 600 to the top plane of the higher second boss 700. The angle between the guide ramp 710 and the top plane of the first boss 600 can be set to be larger so that the guide ramp 710 has a gentler slope to reduce the obstruction to the movement of the fabric.

[0059] In one possible implementation, the first groove 720 and the second groove 620 have a certain depth, and the bottoms of the first groove 720 and the second groove 620 are at the same height. That is, the distance between the bottom of the first groove 720 and the top plane of the second boss 700 in the first direction is equal to the distance between the bottom of the second groove 620 and the top plane of the second boss 700 in the first direction. The edges of the first groove 720, the second groove 620, and the second through hole 610 are all smoothly designed to effectively reduce wear between the sewing thread and the first groove 720, the second groove 620, and the second through hole 610. The first groove 720 is located at the middle of the guide slope 710 in the second direction. Similarly, the second groove 620 and the second through hole 610 are located at the middle of the first boss 600 in the second direction. The widths of the first groove 720, the second groove 620, and the second through hole 610 in the second direction are the same. During the sewing process, even if the thread twists into a ball when taking it up, it can pass through the second through hole 610, the second groove 620, and the first groove 720 more smoothly, preventing the generation of slip points. At the same time, the second groove 620 and the first groove 720 can provide clearance for the bottom thread entering them.

[0060] In one possible implementation, the connection between the guide ramp 710 and the top plane of the first boss 600 is smoothly provided to reduce the resistance of the fabric moving from the top plane of the first boss 600 to the guide ramp 710. The connection between the guide ramp 710 and the top plane of the second boss 700 is also smoothly provided to reduce the resistance of the fabric moving from the guide ramp 710 to the top plane of the first boss 600.

[0061] The top plane of the second boss 700 can be configured as a semi-circular surface, including an arc-shaped edge and a straight edge. The straight edge extends along a second direction and is used to connect with the top of the guide slope 710. The cross-sectional dimension of the second boss 700 perpendicular to the first direction gradually decreases in the direction away from the first boss 600, and the bottom cross-sectional dimension of the second boss 700 is larger than the top cross-sectional dimension of the second boss 700. The second boss 700 also includes a first arc-shaped side surface connected to the arc-shaped edge and both sides of the guide slope 710. The cross-sectional dimension of the first boss 600 perpendicular to the first direction gradually decreases in the direction away from the pinhole plate body 500, and the bottom cross-sectional dimension of the first boss 600 is larger than the top cross-sectional dimension of the first boss 600. The first protrusion 600 also includes a second arc-shaped side surface connected to the top plane of the pinhole plate body 500. The top of the second arc-shaped side surface is connected to the top plane of the first arc-shaped side surface and the first protrusion 600. The first arc-shaped side surface and the second arc-shaped side surface have the same slope relative to the side of the pinhole plate body 500 away from the pin plate, which makes the first protrusion 600 and the second protrusion 700 easy to process while preventing the template from being stuck by the first protrusion 600 and the second protrusion 700 when moving. The specific slope of the first arc-shaped side surface and the second arc-shaped side surface relative to the side of the pinhole plate body 500 away from the pin plate can be set according to actual needs and is not specifically limited here.

[0062] In one possible implementation, the bottom of the large presser foot base 100 has two third grooves 120, which are located on both sides of the first through hole 110 in the third direction. Preferably, the third grooves 120 penetrate the large presser foot base 100 in the second direction. The top of the large presser foot pressure plate 200 is provided with two third protrusions 210. The two third protrusions 210 of the same large presser foot pressure plate 200 are spaced apart in the third direction to correspond to the third grooves 120, that is, one third protrusion of the same large presser foot pressure plate 200. 210 corresponds to one of the aforementioned third grooves 120, and another third protrusion 210 corresponds to the other of the aforementioned third grooves 120. The top surface of the third groove 120 is provided with a plurality of fourth grooves 130. The top surface of the third groove 120 refers to an inner wall of the third groove 120 that is away from the large pressure foot plate 200. One end of the elastic member 300 is located inside the fourth groove 130, and the other end of the elastic member 300 extends to the outside of the fourth groove 130 and is connected to the third protrusion 210. The elastic member 300 may be, but is not limited to, a spring.

[0063] The two third protrusions 210 of the large presser foot plate 200 correspond one-to-one with the two third grooves 120 of the large presser foot base 100. A fourth groove 130 is formed on the third groove 120 away from the inner wall of the large presser foot plate 200. This allows the elastic element 300, with one end located inside the fourth groove 130 and the other end extending outside and connected to the third protrusion 210, to compress when the large presser foot plate 200 and the large presser foot base 100 move towards each other. For example, when the large presser foot base 100 moves towards the template under the action of the large presser foot mounting plate, the large presser foot connected to the bottom of the large presser foot base 100 via the elastic element 300... The pressure plate 200 contacts the template, which restricts the downward movement of the large presser foot 200. When the large presser foot seat 100 continues to move downward, the distance between the large presser foot 200 and the large presser foot seat 100 is reduced, causing the elastic element 300 to be compressed. After the large presser foot seat 100 moves to its lower position, the distance between the large presser foot seat 100 and the large presser foot 200 no longer changes. The compressed elastic element 300 will cause the large presser foot seat 100 and the large presser foot 200 to have a tendency to move in opposite directions, so that the large presser foot 200 presses the template tightly, thereby ensuring that the template presses the fabric tightly and realizing the synchronous movement of the template and the fabric.

[0064] In one possible implementation, the top of the third protrusion 210 extends into the third groove 120, and the top of the third protrusion 210 has extensions 220 extending in the second direction on both sides. The bottom of the large pressure foot 100 is connected to a limiting plate 400. The limiting plate 400 fits against the end plane of the third groove 120 facing the limiting plate 400 and partially seals the third groove 120. The limiting plate 400 has a limiting hole 410 for the third protrusion 210 to move in the first direction. The width of the limiting hole 410 in the second direction is less than the distance between the opposite sides of the two extensions 220 on the same third protrusion 210, so that the elastic member 300 can drive the third protrusion 210 to move away from the fourth groove 130 in the first direction and abut against the limiting plate 400 through the extensions 220 to limit the movement of the third protrusion 210.

[0065] The width of the third protrusion 210 in the third direction is smaller than the width of the third groove 120 in the third direction, allowing the third protrusion 210 to enter the third groove 120 along the first direction. The third groove 120 provides clearance for the movement of the third protrusion 210 when the large pressure foot plate 200 and the large pressure foot seat 100 move towards each other. To facilitate guiding the movement of the third protrusion 210, a limiting plate 400 is connected to the bottom of the large pressure foot seat 100. The limiting plate 400 has a groove that connects to the third protrusion 210 in the second direction. The directional limiting hole 410 prevents the third protrusion 210 from shifting in the second direction through the inner wall of the limiting hole 410 in the second direction, ensuring the distance between the two large pressure foot plates 200 in the second direction. At the same time, the width of the third groove 120 in the third direction is the effective width of the limiting hole 410 in the third direction. Since the width of the third groove 120 in the third direction is slightly larger than the width of the third protrusion 210 in the third direction, it allows the large pressure foot plate 200 to wobble slightly in the third direction.

[0066] The top of the third protrusion 210 has extensions 220 extending in the second direction on both sides. The extensions 220 make the width of the top of the third protrusion 210 in the second direction greater than the width of the limiting hole 410 in the second direction. This prevents the third protrusion 210, whose top is located in the third groove 120, from completely detaching from the third groove 120 in the first direction. This limits the maximum distance of the large presser foot plate 200 and the large presser foot seat 100 moving away from each other. That is, when the extension 220 of the third protrusion 210 abuts against the limiting plate 400 under the action of the elastic member 300, it is the limit position of the large presser foot plate 200 and the large presser foot seat 100 moving away from each other.

[0067] In one possible implementation, there are two limiting plates 400, located on both sides of the first through hole 110 in the first direction. The limiting plates 400 have a "mountain" shaped structure, including a fixing part 420 extending in the second direction and a limiting part 430 connected to the fixing part 420 and extending in the third direction. There are three limiting parts 430, and the three limiting parts 430 are spaced apart in the second direction. A limiting hole 410 is formed between adjacent limiting parts 430 on the same limiting plate 400. That is, a limiting hole 410 for limiting one of the third protrusions 210 of the large pressure foot plate 200 is formed between the first limiting part 430 and the second limiting part 430, and a limiting hole 410 for limiting one of the third protrusions 210 of the other large pressure foot plate 200 is formed between the second limiting part 430 and the third limiting part 430. There are two limiting plates 400 in total, and each limiting plate 400 is used to limit the movement of the two large pressure foot plates 200.

[0068] In one possible implementation, the fixing part 420 is provided with a plurality of first fixing holes 421 extending along a first direction, and the first fixing holes 421 are arranged sequentially along a second direction. The large pressure foot seat 100 is provided with second fixing holes 140 corresponding to the first fixing holes 421. The second fixing holes 140 are located on the side opposite to the two third grooves 120, that is, the fixing part 420 is located on the side opposite to the two third grooves 120, so that the limiting part 430 can cooperate with the third grooves 120 to limit the movement of the third protrusion 210. The second fixing hole 140 is preferably a stepped hole. That is, the second fixing hole 140 includes a first hole with a larger cross-sectional size and a second hole with a smaller cross-sectional size. The first hole is located on the side of the second hole away from the fixing part 420. A shoulder is formed between the first hole and the second hole. The second fixing member is connected to the corresponding first fixing hole 421 and second fixing hole 140. For example, the first fixing hole 421 is a threaded hole. The second fixing member includes a rod head and a rod body connected to the rod head. The rod head abuts against the shoulder, and the rod body is inserted into the second hole, screwed into and connected to the first fixing hole 421, so that the limiting plate 400 is fixed relative to the large pressure foot seat 100.

[0069] In one possible implementation, the third protrusion 210 has first inclined surfaces 211 on both sides in the third direction, and the first inclined surfaces 211 are located at the top of the third protrusion 210. The third groove 120 has at least one inner wall in the third direction with a second inclined surface 121. The second inclined surface 121 is located at the end of the third groove 120 away from the fourth groove 130, so that the end of the third groove 120 away from the fourth groove 130 has a flared structure. The angle between the first inclined surface 211 and the first direction and the angle between the second inclined surface 121 and the first direction are equal, for example, both are 45°, so that at least one first inclined surface 211 can fit against the second inclined surface 121 for guiding the top of the third protrusion 210 into the third groove 120, so that the top of the third protrusion 210 can enter into the third groove 120.

[0070] In one possible implementation, there are multiple fourth grooves 130, and the multiple fourth grooves 130 are arranged sequentially in the second direction. The top of the third protrusion 210 is provided with a fifth groove 212 corresponding to the fourth groove 130. One end of the same elastic member 300 extends into the fourth groove 130 and the other end extends into the fifth groove 212. The axes of the corresponding fourth grooves 130 and fifth grooves 212 are collinear, and their cross-sectional dimensions perpendicular to the extension and contraction direction of the elastic member 300 are consistent.

[0071] Two adjacent fifth grooves 212 can be provided on the top of the same third protrusion 210. The two adjacent fifth grooves 212 are spaced apart in the second direction. Each third groove 120 is provided with four fourth grooves 130. Two of the four grooves correspond to the two fifth grooves 212 on the top of the same third protrusion 210, and two of the four grooves correspond to the two fifth grooves 212 on the top of another third protrusion 210. By assembling the elastic member 300 into the corresponding upper and lower fourth grooves 130 and fifth grooves 212, when the large pressure foot plate 200 and the large pressure foot seat 100 move towards each other, the inner wall of the fourth groove 130 and fifth groove 212 abuts against the elastic member 300 on the opposite side to compress the elastic member 300. At the same time, the circumferential walls of the fourth groove 130 and fifth groove 212 are used to limit the elastic member 300 and prevent the elastic member 300 from moving horizontally.

[0072] Furthermore, the inner wall of the fourth groove 130 is provided with a first snap-fit ​​protrusion, and the inner wall of the fifth groove 212 is provided with a second snap-fit ​​protrusion. The first snap-fit ​​protrusion is used to restrict the elastic member 300 from disengaging from the fourth groove 130, and the second snap-fit ​​protrusion is used to restrict the elastic member 300 from disengaging from the fifth groove 212, so as to enhance the fixing effect on the elastic member 300.

[0073] Furthermore, a distance detector can be installed on the side of the large presser foot plate 200 facing the large presser foot base 100. The distance detector can determine the distance between the large presser foot plate 200 and the large presser foot base 100, thus determining the compression of the spring between them. For example, initially, the spring is at its natural length, and the large presser foot plate 200 is supported on the limiting plate 400 via the extension body 220. When the distance between the large presser foot plate 200 and the large presser foot base 100 changes, the compression of the spring can be determined accordingly. The magnitude of the force between the spring and the large presser foot plate 200 is calculated, and the pressure exerted by the large presser foot plate 200 on the template is further calculated based on the contact area between the large presser foot plate 200 and the template. When the pressure exerted by both large presser foot plates 200 on the template reaches the preset value, the large presser foot mounting plate is controlled to stop moving downward, so that the large presser foot seat 100 maintains the preset height. When the fabric is different, the preset value of the pressure exerted by the large presser foot plate 200 on the template can be set differently to ensure that the large presser foot plate 200 has a pressing effect on the template while avoiding excessive pressure that may affect the movement of the template.

[0074] This application also provides a template machine, which includes the sewing material clamping assembly as described above, and has all the beneficial effects of the sewing material clamping assembly described above, which will not be repeated here.

[0075] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A sewing fabric clamping assembly, characterized in that, include: A large presser foot seat (100) is mounted on the bottom of the large presser foot mounting plate of the template machine. A first through hole (110) is provided in the middle along the first direction. Two large presser foot plates (200) are connected to the bottom of the large presser foot seat (100) and spaced apart in the second direction. An elastic element (300) is connected between the large presser foot seat (100) and the large presser foot plates (200). The pinhole plate includes a pinhole plate body (500) for connecting with the pin plate of the template machine, a first boss (600) disposed on the top of the pinhole plate body (500), and a second boss (700) disposed on the top of the first boss (600). The first boss (600) has a second through hole (610) that passes through the pinhole plate body (500) and is spaced apart from the second boss (700) in a third direction. The second through hole (610) is coaxially disposed with the first through hole (110). The second through hole (610) and the first through hole (110) are used to allow the needle of the template machine to move along the first direction to sew the fabric located in the template. The elastic element (300) is used to drive the large presser foot plate (200) away from the large presser foot seat (100) in the first direction to press the template located on both sides of the needle in the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The sewing material clamping assembly according to claim 1, characterized in that, The second boss (700) has a guide slope (710) on the side near the second through hole (610). The bottom of the guide slope (710) is connected to the top plane of the first boss (600) and is used to guide the fabric from the second through hole (610) to the top of the second boss (700). The guide slope (710) has a first groove (720). The top plane of the first boss (600) has a second groove (620) that connects the first groove (720) and the second through hole (610). The first groove (720) and the second groove (620) are used to form a clearance space to avoid the bottom thread sewn onto the fabric.

3. The sewing material clamping assembly according to claim 2, characterized in that, The top plane of the pinhole plate body (500), the top plane of the first boss (600), and the top plane of the second boss (700) are all perpendicular to the first direction, and the angle between the guide slope (710) and the top plane of the first boss (600) is 120°~170°.

4. The sewing material clamping assembly according to claim 1, characterized in that, The first boss (600) has a cross-sectional dimension perpendicular to the first direction that tapers away from the pinhole plate body (500); the second boss (700) has a cross-sectional dimension perpendicular to the first direction that tapers away from the first boss (600).

5. The sewing material clamping assembly according to claim 1, characterized in that, The bottom of the large presser foot (100) has two third grooves (120), which are located on both sides of the first through hole (110) in the third direction. The top of the large presser foot plate (200) is provided with two third protrusions (210). The two third protrusions (210) of the same large presser foot plate (200) are spaced apart in the third direction to correspond to the third grooves (120). The top surface of the third groove (120) is provided with a plurality of fourth grooves (130). One end of the elastic member (300) is located in the fourth groove (130), and the other end of the elastic member (300) extends to the outside of the fourth groove (130) and is connected to the third protrusion (210).

6. The sewing material clamping assembly according to claim 5, characterized in that, The top of the third protrusion (210) extends into the third groove (120), and the top of the third protrusion (210) has extensions (220) extending along the second direction on both sides in the second direction. The bottom of the large pressure foot (100) is connected to a limiting plate (400). The limiting plate (400) has a limiting hole (410) for the third protrusion (210) to move along the first direction. The width of the limiting hole (410) in the second direction is less than the distance between the two extensions (220) on the same third protrusion (210) on opposite sides.

7. The sewing material clamping assembly according to claim 6, characterized in that, There are two limiting plates (400), which are respectively located on both sides of the first through hole (110) in the first direction. The limiting plate (400) includes a fixing part (420) extending in the second direction and a limiting part (430) connected to the fixing part (420) and extending in the third direction. The limiting hole (410) is formed between adjacent limiting parts (430) on the same limiting plate (400).

8. The sewing material clamping assembly according to claim 7, characterized in that, The fixing part (420) is provided with a plurality of first fixing holes (421) extending along the first direction. The first fixing holes (421) are arranged sequentially along the second direction. The large pressure foot seat (100) is provided with a second fixing hole (140) corresponding to the first fixing hole (421). The second fixing hole (140) is located on the opposite side of the two third grooves (120). The second fixing member is connected to the corresponding first fixing hole (421) and the second fixing hole (140) so that the limiting plate (400) is fixed relative to the large pressure foot seat (100).

9. The sewing material clamping assembly according to claim 6, characterized in that, The third protrusion (210) has a first inclined surface (211) on both sides in the third direction, and the first inclined surface (211) is located on the top of the third protrusion (210). The third groove (120) has a second inclined surface (121) on at least one inner wall in the third direction. The second inclined surface (121) is located at the end of the third groove (120) away from the fourth groove (130), so that the end of the third groove (120) away from the fourth groove (130) has a flared structure. The angle between the first inclined surface (211) and the first direction and the angle between the second inclined surface (121) and the first direction are equal, so that at least one first inclined surface (211) can fit against the second inclined surface (121) for guiding the top of the third protrusion (210) into the third groove (120).

10. The sewing material clamping assembly according to any one of claims 1-9, characterized in that, The distance between the axis of the second through hole (610) and any of the large pressure foot plates (200) in the second direction is 4-6 mm; the first through hole (110) includes two planar inner walls spaced apart in the third direction, the planar inner walls are perpendicular to the third direction, and the distance between the axis of the second through hole (610) and any of the planar inner walls in the third direction is 17-19 mm.

11. A template machine, characterized in that, Includes the sewing material clamping assembly as described in any one of claims 1-10.

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