Large presser foot assembly and template machine

Abstract

The invention discloses a large presser foot assembly and a template machine, the large presser foot assembly is assembled at the bottom of a large presser foot mounting plate of the template machine, the large presser foot assembly comprises a large presser foot seat and two large presser foot pressing plates, and an avoiding hole extending in the first direction is formed in the middle of the large presser foot seat; the avoiding hole is used for allowing a machine needle of the template machine to move in the first direction so as to sew a fabric located in the template; the two large presser foot pressing plates are connected to the bottom of the large presser foot base through elastic pieces, the two large presser foot pressing plates are arranged in a spaced mode in the second direction, and the elastic pieces are used for enabling the two large presser foot pressing plates to press templates located on the two sides of the machine needle in the second direction respectively when the large presser foot installation plate drives the large presser foot base to move downwards. Relative movement of the template and the fabric located in the template is limited; the actions of the two large presser foot pressing plates are divided, only the expansion and contraction amount of the elastic piece is different when the template has a height difference, displacement of cloth relative to the template in the sewing process caused by the height difference can be avoided, then sewing line stitch bending is avoided, and the shrinkage rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of template machines, and particularly to a large presser foot assembly and a template machine. Background Art

[0002] Currently, there is a common phenomenon of poor flatness after sewing by template machines on the market. In the prior art, the solution to the poor flatness is to paste horsehair interlining on the template. When sewing the fabric, the horsehair interlining provides a certain supporting force for the sewing thread. As a result, the amount of top thread increases, forming thread loops. The thread loops will be tightened when the subsequent fabric is filled with fluff. The horsehair interlining has a certain effect on the flatness of the fabric.

[0003] However, because the horsehair interlining itself has a certain thickness, the position where the horsehair interlining is pasted on the template is thicker than the position where the horsehair interlining is not pasted, resulting in a height difference on both sides of the sewing thread, causing the fabric to displace relative to the template during the sewing process, resulting in curved sewing thread traces and an increased shrinkage rate.

[0004] Therefore, how to avoid the displacement of the fabric relative to the template during the sewing process to avoid curved sewing thread traces is a technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0005] The purpose of the present invention is to provide a large presser foot assembly and a template machine, which can avoid the displacement of the fabric relative to the template during the sewing process to avoid curved sewing thread traces.

[0006] To achieve the above purpose, the present invention provides a large presser foot assembly, which is assembled at the bottom of the large presser foot mounting plate of the template machine and includes:

[0007] A large presser foot base, which is provided with an avoidance hole extending in the first direction in the middle. The avoidance hole is used for the needle of the template machine to move in the first direction to sew the fabric located in the template;

[0008] Two large presser foot pressing plates, which are connected to the bottom of the large presser foot base through elastic members. The two large presser foot pressing plates are spaced apart in the second direction. The elastic members are used to make the two large presser foot pressing plates respectively press the templates on both sides of the needle in the second direction when the large presser foot mounting plate drives the large presser foot base to move downward, so as to limit the relative movement of the template and the fabric located in the template. The second direction and the first direction are perpendicular to each other.

[0009] In a possible embodiment, two first grooves are provided at the bottom of the large presser foot seat, and the two first grooves are respectively located on both sides of the avoidance hole in the third direction. Two protrusions are provided on the top of the large presser foot pressing plate. The two protrusions of the same large presser foot pressing plate are spaced apart in the third direction to correspond to the first grooves. A plurality of second grooves are provided on the top surface of the first groove, one end of the elastic member is located in the second groove, and the other end of the elastic member extends outside the second groove and is connected to the protrusion, and the third direction is perpendicular to the first direction and the second direction.

[0010] In a possible embodiment, the top of the protrusion extends into the first groove body, and extension bodies extending along the second direction are provided on both sides of the top of the protrusion in the second direction, and the bottom of the large presser foot seat is connected to a limiting plate, which is attached to the end surface of the first groove body and partially sealed to the first groove body. The limiting plate is provided with a limiting hole for the protrusion to move along the first direction, and the width of the limiting hole in the second direction is smaller than the distance between the two extension bodies on the same protrusion on opposite sides, so that the elastic member can drive the protrusion to move in the first direction toward away from the second groove body, and abut against the limiting plate through the extension body to limit the movement of the protrusion.

[0011] In a possible embodiment, there are two limiting plates, which are respectively located on both sides of the avoidance hole in the first direction. The limiting plates are in a "mountain" shape, including a fixed portion extending along the second direction, and a limiting portion connected to the fixed portion and extending along the third direction. A limiting hole is formed between adjacent limiting portions on the same limiting plate.

[0012] In a possible embodiment, the fixing portion is provided with a plurality of first fixing holes extending along the first direction, the first fixing holes are arranged in sequence along the second direction, the large presser foot seat is provided with a second fixing hole corresponding to the first fixing holes, the second fixing hole is located on the side opposite to each other of the two first grooves, and the first fixing member is connected to the corresponding first fixing hole and the second fixing hole, so that the limit plate is fixed relative to the large presser foot seat.

[0013] In a possible embodiment, the protrusion is provided with a first inclined surface on both sides in the third direction, and the first inclined surface is located at the top of the protrusion, and the first groove body is provided with 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 first groove body away from the second groove body, so that the end of the first groove body away from the second groove body has a flared structure, and the angle between the first inclined surface and the first direction is equal to the angle between the second inclined surface and the first direction, so that at least one first inclined surface can fit into the second inclined surface for guiding the top of the protrusion to enter the first groove body.

[0014] In a possible implementation, there are multiple second grooves, and the multiple second grooves are arranged in sequence in the second direction. A third groove corresponding to the second groove is formed at the top of the bump. One end of the same elastic member extends into the second groove, and the other end extends into the third groove. The axes of the corresponding second groove and third groove are collinear, and the cross-sectional dimensions perpendicular to the telescopic direction of the elastic member are the same.

[0015] In a possible implementation, a first clamping protrusion is provided on the inner wall of the second groove, and a second clamping protrusion is provided on the inner wall of the third groove. The first clamping protrusion is used to limit the elastic member from detaching from the second groove, and the second clamping protrusion is used to limit the elastic member from detaching from the third groove.

[0016] In a possible implementation, the bottom edge position of the large presser foot pressing plate is rounded.

[0017] A template machine includes the large presser foot assembly as described in any one of the above.

[0018] Compared with the above background technology, the large presser foot assembly provided by the present invention is assembled at the bottom of the large presser foot mounting plate of the template machine, and includes a large presser foot seat and two large presser foot pressing plates. A relief hole extending in the first direction is provided in the middle of the large presser foot seat. The relief hole is used for the sewing needle of the template machine to move in the first direction to sew the fabric located in the template; the two large presser foot pressing plates are connected to the bottom of the large presser foot seat through elastic members, and the two large presser foot pressing plates are spaced apart in the second direction. When the large presser foot mounting plate drives the large presser foot seat to move downward, the elastic member is used to make the two large presser foot pressing plates respectively press the templates on both sides of the sewing needle in the second direction, so as to limit the relative movement of the template and the fabric located in the template. The second direction and the first direction are perpendicular to each other.

[0019] Specifically, by connecting two large presser foot pressing plates spaced apart in the second direction to a large presser foot seat at the same time, one of the two large presser foot pressing plates is used to press the template on one side of the sewing needle in the second direction, and the other of the two large presser foot pressing plates is used to press the template on the other side of the sewing needle in the second direction. The large presser foot pressing plates and the large presser foot seat are all connected through elastic members. The actions of the two large presser foot pressing plates are divided. When any one of the large presser foot pressing plates contacts the template, the connected elastic member can be compressed. When there is a height difference in the template, only the telescopic amount of the elastic member is different, but the large presser foot pressing plates can all press against the template under the action of the elastic member, which can avoid the displacement of the fabric relative to the template during the sewing process caused by the height difference in the prior art, resulting in the bending of the sewing thread trace and reducing the shrinkage rate. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0021] Figure 1 Structural schematic diagram of the large presser foot assembly provided by the embodiment of the present invention;

[0022] Figure 2 For Figure 1 front view;

[0023] Figure 3 For Figure 1 side view;

[0024] Figure 4 For Figure 1 top view;

[0025] Figure 5 Structural schematic diagram of the large presser foot base provided by the embodiment of the present invention;

[0026] Figure 6 Structural schematic diagram of the large presser foot plate provided by the embodiment of the present invention;

[0027] Figure 7 Structural schematic diagram of the limiting plate provided by the embodiment of the present invention;

[0028] Figure 8 Structural schematic diagram of the assembly of the limiting plate and the large presser foot base provided by the embodiment of the present invention;

[0029] Figure 9 Structural schematic diagram of the assembly of the limiting plate, the large presser foot plate and the large presser foot base provided by the embodiment of the present invention.

[0030] Wherein:

[0031] 100 - large presser foot base, 110 - avoidance hole, 120 - first groove, 121 - second inclined surface, 130 - second groove, 140 - second fixing hole, 150 - mounting hole;

[0032] 200 - large presser foot plate, 210 - convex block, 211 - first inclined surface, 212 - third groove, 220 - extension body;

[0033] 400 - limiting plate, 410 - limiting hole, 420 - fixing part, 421 - first fixing hole, 430 - limiting part. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In order to enable those skilled in the art in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner" and "outer" etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] The purpose of the present invention is to provide a large presser foot assembly and a template machine, which can avoid the displacement of the fabric relative to the template during the sewing process, so as to avoid the bending of the sewing thread trace.

[0038] It should be noted that in this embodiment, the direction of X in the accompanying drawings is defined as the first direction, the direction of Y is defined as the second direction, and the direction of Z is defined as the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , to achieve the above object, the present invention provides a large presser foot assembly, which is assembled at the bottom of the large presser foot mounting plate of the template machine. The large presser foot assembly includes a large presser foot base 100 and two large presser foot pressing plates 200. The large presser foot base 100 is used to connect with the bottom of the large presser foot mounting plate. Among them, the large presser foot base 100 is provided with a mounting hole 150, and the mounting hole 150 is a through hole or a threaded hole. The large presser foot mounting plate is also provided with a corresponding through hole or threaded hole. Through the penetration and fixation of the connecting piece, the large presser foot base 100 and the large presser foot mounting plate can be relatively fixed, and the large presser foot base 100 can move synchronously under the movement of the large presser foot mounting plate. For example, the large presser foot mounting plate drives the large presser foot base 100 to move synchronously in the first direction, that is, the large presser foot mounting plate drives the large presser foot base 100 to move up or down synchronously.

[0040] The large presser foot base 100 is used to press the template. The template refers to a fixing tool that can be placed on the sewing table and used to fix the fabric. Through the template, the fabric is made flat and easy to sew. An avoidance hole 110 extending in the first direction is provided in the middle of the large presser foot base 100. The avoidance hole 110 is used for the sewing needle of the template machine to move in the first direction to sew the fabric located inside the template. The avoidance hole 110 provides an avoidance space for the movement of the sewing needle. The sewing needle shuttles up and down in the first direction without horizontal displacement, and the large presser foot base 100 also does not displace. Only the template drives the fabric to move synchronously along the preset trajectory. A horsehair interlining is pasted inside the template, and the horsehair interlining provides a certain supporting force for the sewing thread, resulting in an increase in the amount of top thread and the formation of a loop.

[0041] Two large presser foot plates 200 are connected to the bottom of the large presser foot base 100 through elastic members. The two large presser foot plates 200 are spaced apart in the second direction. The space between the two large presser foot plates 200 also provides an avoidance space for the movement of the sewing needle in the first direction. The elastic member is used to make the two large presser foot plates 200 press the templates on both sides of the sewing needle in the second direction respectively when the large presser foot mounting plate drives the large presser foot base 100 to move down, so as to limit the relative movement of the template and the fabric located inside the template. The bottom edge position of the large presser foot plate 200 is rounded to avoid damage to the template caused by abutment, friction, etc. between the bottom of the template and the large presser foot plate 200.

[0042] By connecting two large presser foot plates 200 spaced apart in the second direction to a large presser foot base 100 at the same time, one of the two large presser foot plates 200 is used to press the template on one side of the sewing needle in the second direction, and the other of the two large presser foot plates 200 is used to press the template on the other side of the sewing needle in the second direction. The large presser foot plates 200 and the large presser foot base 100 are all connected through elastic members. The actions of the two large presser foot plates 200 are separated. When any one of the large presser foot plates 200 contacts the template, the connected elastic member can be compressed. When the template has a height difference, only the amount of expansion and contraction of the elastic member is different, but the large presser foot plates 200 can all press against the template under the action of the elastic member, which can avoid the displacement of the fabric relative to the template during the sewing process caused by the height difference in the prior art, resulting in the bending of the sewing thread trace and reducing the shrinkage rate.

[0043] Please refer to Figure 5 and Figure 6, in a possible implementation, two first grooves 120 are formed at the bottom of the large presser foot base 100. The two first grooves 120 are respectively located on both sides of the avoidance hole 110 in the third direction. Preferably, the first groove 120 penetrates the large presser foot base 100 along the second direction. Two convex blocks 210 are provided on the top of the large presser foot pressing plate 200. The two convex blocks 210 of the same large presser foot pressing plate 200 are spaced apart in the third direction to correspond to the first groove 120. That is, one convex block 210 of the same large presser foot pressing plate 200 corresponds to one of the above-mentioned first grooves 120, and the other convex block 210 corresponds to the other first groove 120. A plurality of second grooves 130 are formed on the top surface of the first groove 120. The top surface of the first groove 120 refers to an inner wall of the first groove 120 facing away from the large presser foot pressing plate 200. One end of the elastic member is located in the second groove 130, and the other end of the elastic member extends out of the second groove 130 and is connected to the convex block 210. The elastic member can be, but is not limited to, a spring.

[0044] Through the one-to-one correspondence between the two convex blocks 210 of the large presser foot pressing plate 200 and the two first grooves 120 of the large presser foot base 100, and the second groove 130 is formed on the inner wall of the first groove 120 facing away from the large presser foot pressing plate 200, the elastic member with one end located in the second groove 130 and the other end extending out of the second groove 130 and connected to the convex block 210 is compressed when the large presser foot pressing 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 driven by the large presser foot mounting plate, the large presser foot pressing plate 200 connected to the bottom of the large presser foot base 100 by the elastic member will contact the template. The downward movement of the large presser foot pressing plate 200 is restricted by the template. When the large presser foot base 100 continues to move downward, the distance between the large presser foot pressing plate 200 and the large presser foot base 100 can be reduced, so that the elastic member is compressed. After the large presser foot base 100 moves down to the position, the distance between the large presser foot base 100 and the large presser foot pressing plate 200 no longer changes. The compressed elastic member will make the large presser foot base 100 and the large presser foot pressing plate 200 tend to move away from each other, so that the large presser foot pressing plate 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.

[0045] Please refer to Figure 7 , Figure 8 and Figure 9 , in a possible implementation, the top of the convex block 210 extends into the first groove 120, and extension bodies 220 extending along the second direction are provided on both sides of the top of the convex block 210 in the second direction. A limiting plate 400 is connected to the bottom of the large presser foot base 100. The limiting plate 400 fits against the end face of the first groove 120 and partially seals the first groove 120. The end face of the first groove 120 refers to the end plane where the first groove 120 is formed (as shown in the appendix Figure 3(bottom surface of the large presser foot base 100), the limiting plate 400 is provided with a limiting hole 410 for the convex block 210 to move along the first direction, and the width of the limiting hole 410 in the second direction is smaller than the distance between the two opposite sides of the two extension bodies 220 on the same convex block 210, so that the elastic member can drive the convex block 210 to move away from the second groove body 130 in the first direction and abut against the limiting plate 400 through the extension bodies 220 to limit the movement of the convex block 210.

[0046] The width of the convex block 210 in the third direction is smaller than the width of the first groove body 120 in the third direction, so that the convex block 210 can enter the first groove body 120 along the first direction. The first groove body 120 can provide an avoidance space for the movement of the convex block 210 when the large presser foot pressing plate 200 and the large presser foot base 100 move towards each other. In order to facilitate the guiding of the movement of the convex block 210, a limiting plate 400 is connected to the bottom of the large presser foot base 100. A limiting hole 410 adapted to the convex block 210 in the second direction is formed on the limiting plate 400. The inner wall of the limiting hole 410 in the second direction avoids the deviation of the convex block 210 in the second direction, ensuring the distance between the two large presser foot pressing plates 200 in the second direction. At the same time, the width of the first groove body 120 in the third direction is the effective width of the limiting hole 410 in the third direction. By making the width of the first groove body 120 in the third direction slightly larger than the width of the convex block 210 in the third direction, the large presser foot pressing plate 200 can be allowed to slightly shake in the third direction.

[0047] On both sides of the top of the convex block 210 in the second direction, there are extension bodies 220 extending along the second direction. Through the extension bodies 220, the width of the top of the convex block 210 in the second direction is larger than the width of the limiting hole 410 in the second direction, which can prevent the convex block 210 with its top located in the first groove body 120 from completely separating from the first groove body 120 in the first direction, so as to limit the maximum distance of the separation movement of the large presser foot pressing plate 200 and the large presser foot base 100. That is, when the extension bodies 220 of the convex block 210 with extension bodies 220 abut against the limiting plate 400 under the action of the elastic member, it is the limit position of the separation movement of the large presser foot pressing plate 200 and the large presser foot base 100.

[0048] In a possible implementation, there are two limiting plates 400, which are respectively located on both sides of the avoidance hole 110 in the first direction. The limiting plate 400 has a "mountain" - shaped structure, including a fixing part 420 extending along the second direction and a limiting part 430 connected to the fixing part 420 and extending along 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 is formed between the first limiting part 430 and the second limiting part 430 for limiting one bump 210 in the large presser - foot pressing plate 200, and a limiting hole 410 is formed between the second limiting part 430 and the third limiting part 430 for limiting one bump 210 in the other large presser - foot pressing plate 200. There are two limiting plates 400 in total, and each limiting plate 400 is used for limiting the movement of two large presser - foot pressing plates 200.

[0049] In a possible implementation, 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 in sequence along the second direction. The large presser - foot base 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 of the two first grooves 120 facing away from each other. That is, the fixing part 420 is located on the side of the two first grooves 120 facing away from each other, so that the limiting part 430 can cooperate with the first groove 120 to limit the movement of the bump 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 dimension and a second hole with a smaller cross - sectional dimension. The first hole is located on the side of the second hole facing away from the fixing part 420, and a shoulder is formed between the first hole and the second hole. The first 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, and the first fixing member includes a rod head and a rod body connected to the rod head. By abutting the rod head against the shoulder and threading the rod body through the second hole and then screwing it into and connecting with the first fixing hole 421, the limiting plate 400 is fixed relative to the large presser - foot base 100.

[0050] In a possible implementation, first inclined surfaces 211 are provided on both sides of the bump 210 in the third direction, and the first inclined surfaces 211 are located at the top of the bump 210. At least one inner wall of the first groove 120 in the third direction is provided with a second inclined surface 121, and the second inclined surface 121 is located at the end of the first groove 120 facing away from the second groove 130, so that the end of the first groove 120 facing away from the second groove 130 has a flared structure. The angle between the first inclined surface 211 and the first direction is equal to the angle between the second inclined surface 121 and the first direction. For example, both are 45°, so that at least one first inclined surface 211 can be attached to the second inclined surface 121, which is used for guiding the top of the bump 210 to enter the first groove 120, facilitating the top of the bump 210 to enter the first groove 120.

[0051] In a possible implementation, there are multiple second grooves 130, and the multiple second grooves 130 are arranged in sequence in the second direction. A third groove 212 corresponding to the second groove 130 is provided at the top of the bump 210. One end of the same elastic member extends into the second groove 130 and the other end extends into the third groove 212. The axes of the corresponding second groove 130 and third groove 212 are collinear, and the cross-sectional dimensions perpendicular to the telescopic direction of the elastic member are the same.

[0052] Two adjacent third grooves 212 can be provided at the top of the same bump 210. The two adjacent third grooves 212 are spaced apart in the second direction. Four second grooves 130 are provided on each first groove 120. Two of the four grooves correspond to the two third grooves 212 at the top of the same bump 210, and two of the four grooves correspond to the two third grooves 212 at the top of another bump 210. By assembling the elastic member into the vertically corresponding second groove 130 and third groove 212, when the large pressure foot pressing plate 200 and the large pressure foot seat 100 move towards each other, the inner walls on the opposite sides of the second groove 130 and the third groove 212 abut against the elastic member to compress the elastic member. At the same time, the circumferential walls of the second groove 130 and the third groove 212 are used to limit the elastic member to prevent horizontal movement of the elastic member.

[0053] Furthermore, a first clamping protrusion is provided on the inner wall of the second groove 130, and a second clamping protrusion is provided on the inner wall of the third groove 212. The first clamping protrusion is used to limit the elastic member from detaching from the second groove 130, and the second clamping protrusion is used to limit the elastic member from detaching from the third groove 212, so as to enhance the fixing effect on the elastic member.

[0054] In addition, a distance detector may be provided on the side of the large presser foot pressing plate 200 facing the large presser foot base 100. Through the distance detector, the distance between the large presser foot pressing plate 200 and the large presser foot base 100 can be judged, that is, the compression amount of the spring located between the large presser foot pressing plate 200 and the large presser foot base 100 can be judged. For example, in the initial state, the spring is in its natural length, and the large presser foot pressing plate 200 is supported on the limiting plate 400 through the extension body 220; when the distance between the large presser foot pressing plate 200 and the large presser foot base 100 changes, the magnitude of the force between the spring and the large presser foot pressing plate 200 can be calculated according to the compression amount of the spring, and the pressure of the large presser foot pressing plate 200 on the template can be further calculated according to the contact area between the large presser foot pressing plate 200 and the template. When the pressures of the two large presser foot pressing plates 200 on the template both reach the preset value, the control of the large presser foot mounting plate stops moving downward, so that the large presser foot base 100 maintains the preset height; when the fabrics are different, the preset values of the pressures of the large presser foot pressing plates 200 on the template can be set differently, while ensuring the pressing effect of the large presser foot pressing plates 200 on the template, avoiding too large pressure from affecting the movement of the template.

[0055] The present application also provides a template machine, which includes the large presser foot assembly as described above and also has the beneficial effects possessed by the above large presser foot assembly, which will not be elaborated here.

[0056] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0057] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0058] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A large presser foot assembly is assembled at the bottom of the large presser foot mounting plate of a template machine, and is characterized in that, Comprising: A large presser foot base (100) with an avoidance hole (110) extending in a first direction in the middle, and the avoidance hole (110) is used for the sewing needle of the template machine to move along the first direction to sew the fabric located within the template; Two large presser foot plates (200) connected to the bottom of the large presser foot base (100) through elastic members. The two large presser foot plates (200) are spaced apart in a second direction. When the elastic member drives the large presser foot base (100) to move downward, the elastic member is used to make the two large presser foot plates (200) respectively press the templates on both sides of the sewing needle in the second direction, so as to limit the relative movement of the template and the fabric located within the template. The second direction and the first direction are perpendicular to each other.

2. The large presser foot assembly according to claim 1, wherein Two first grooves (120) are formed at the bottom of the large presser foot base (100), and the two first grooves (120) are respectively located on both sides of the avoidance hole (110) in a third direction. Two bumps (210) are provided at the top of each large presser foot plate (200). The two bumps (210) of the same large presser foot plate (200) are spaced apart in the third direction to correspond to the first grooves (120). A plurality of second grooves (130) are formed on the top surface of the first groove (120). One end of the elastic member is located within the second groove (130), and the other end of the elastic member extends out of the second groove (130) and is connected to the bump (210). The third direction is perpendicular to the first direction and the second direction.

3. The large presser foot assembly according to claim 2, wherein The top of the bump (210) extends into the first groove (120), and extension bodies (220) extending in the second direction are provided on both sides of the top of the bump (210) in the second direction. A limiting plate (400) is connected to the bottom of the large presser foot base (100). The limiting plate (400) fits against the end face of the first groove (120) and partially seals the first groove (120). The limiting plate (400) is provided with a limiting hole (410) for the bump (210) to move along the first direction, and the width of the limiting hole (410) in the second direction is smaller than the distance between the two extension bodies (220) on the opposite sides of the same bump (210), so that the elastic member can drive the bump (210) to move in the first direction away from the second groove (130) and abut against the limiting plate (400) through the extension body (220) to limit the movement of the bump (210).

4. The large presser foot assembly according to claim 3, wherein There are two limit plates (400), which are respectively located on both sides of the avoidance hole (110) in the first direction. The limit plate (400) has a "mountain"-shaped structure, comprising a fixing portion (420) extending along the second direction, and a limit portion (430) connected to the fixing portion (420) and extending along the third direction. The limit hole (410) is formed between adjacent limit portions (430) on the same limit plate (400).

5. The large presser foot assembly according to claim 4, characterized in that: The fixing portion (420) is provided with a plurality of first fixing holes (421) extending along a first direction, the first fixing holes (421) are arranged in sequence along the second direction, the large presser 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 opposite sides of the two first grooves (120), and a first fixing member is connected to the corresponding first fixing holes (421) and the second fixing holes (140), so that the limiting plate (400) is fixed relative to the large presser foot seat (100).

6. The large presser foot assembly according to claim 4, characterized in that: The protrusion (210) is provided with first inclined surfaces (211) on both sides in the third direction, and the first inclined surfaces (211) are located at the top of the protrusion (210); at least one inner wall of the first groove body (120) in the third direction is provided with a second inclined surface (121); the second inclined surface (121) is located at the end of the first groove body (120) away from the second groove body (130), so that the end of the first groove body (120) away from the second groove body (130) is in a flared structure; the angle between the first inclined surface (211) and the first direction is equal to the angle between the second inclined surface (121) and the first direction, so that at least one of the first inclined surfaces (211) can fit on the second inclined surface (121), and is used for guiding the top of the protrusion (210) to enter the first groove body (120).

7. The large presser foot assembly according to claim 4, characterized in that: There are a plurality of second groove bodies (130), and the plurality of second groove bodies (130) are arranged in sequence in the second direction; a third groove body (212) corresponding to the second groove body (130) is provided on the top of the protrusion (210); one end of the same elastic member extends into the second groove body (130), and the other end extends into the third groove body (212); the axes of the corresponding second groove bodies (130) and the third groove bodies (212) are collinear, and the cross-sectional dimensions perpendicular to the expansion and contraction direction of the elastic member are consistent.

8. The large presser foot assembly according to claim 7, wherein, The inner wall of the second groove body (130) is provided with a first clamping protrusion, and the inner wall of the third groove body (212) is provided with a second clamping protrusion. The first clamping protrusion is used to limit the elastic member from disengaging from the second groove body (130), and the second clamping protrusion is used to limit the elastic member from disengaging from the third groove body (212).

9. The large presser foot assembly according to any one of claims 1-8, characterized in that, The bottom edge position of the large presser foot pressing plate (200) is provided with a rounded corner.

10. A template machine, characterized in that, It includes the large presser foot assembly according to any one of claims 1-9.

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