Feeding teeth and sewing machine

Abstract

The feeding tooth and sewing machine claimed in the present application, the feeding tooth comprises a tooth body and a plurality of teeth, the tooth body is provided with a needle hole for the needle to pass through, the plurality of teeth are arranged on the two opposite sides of the needle hole in the horizontal direction and connected with the tooth body, wherein each tooth is respectively formed with a first inclined surface and / or a second inclined surface in the horizontal direction, the plane direction of the first inclined surface is perpendicular to the tangent direction of the start point of the feeding movement trajectory of the feeding tooth in the forward feeding, and the plane direction of the second inclined surface is perpendicular to the tangent direction of the start point of the feeding movement trajectory of the feeding tooth in the reverse feeding. The feeding tooth of the present application can realize optimal mechanical transmission in the starting state of the reverse and forward feeding, avoid force loss, ensure stable feeding without slipping of the feeding tooth, make the needle distance stable, and realize high coincidence degree of the reverse and forward feeding, thereby ensuring the sewing precision of the cloth and the product appearance.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewing machine feeding, and in particular relates to a feeding tooth and a sewing machine. Background Technology

[0002] High-end products such as car seats and furniture, made from materials such as leather, canvas, artificial leather, and rubber sheet, often have high requirements for appearance and stitching, such as stable stitch spacing and high overlap of needle holes in forward and reverse stitching.

[0003] Currently, most integrated feeding sewing machines on the market use a single-sided, densely packed, and sharp feeding tooth design. When sewing high-quality leather products, the unidirectional tilt of the teeth on the feeding teeth makes it difficult for them to grip the fabric effectively when feeding in the reverse direction. This can easily cause the fabric to slip, leading to problems such as stitch length fluctuations and misalignment of the forward and reverse stitch paths, which seriously affect sewing accuracy and product aesthetics. Utility Model Content

[0004] In view of this, it is necessary to provide a feeding tooth and a sewing machine for solving the above-mentioned technical problems.

[0005] A feed dog for feeding fabric during backstitching in a sewing machine; the feed dog includes:

[0006] The tooth body has a needle hole for the machine needle to pass through;

[0007] Multiple teeth are arranged on two opposite sides of the pinhole in the horizontal direction and connected to the tooth body, wherein each tooth has a first inclined surface and / or a second inclined surface in the horizontal direction;

[0008] The plane direction of the first inclined surface is perpendicular to the tangent direction of the starting point of the forward feeding motion trajectory of the feeding teeth; and the plane direction of the second inclined surface is perpendicular to the tangent direction of the starting point of the reverse feeding motion trajectory of the feeding teeth.

[0009] Understandably, the use of a double-sloping tooth structure to feed the material ensures optimal force transmission at the start of both forward and reverse stitches, avoiding force loss. This guarantees stable feeding without slippage, resulting in stable stitch spacing and high overlap between forward and reverse stitches, thus ensuring fabric sewing accuracy and product aesthetics.

[0010] In one embodiment, the plurality of teeth includes a first tooth, a second tooth, and a plurality of intermediate teeth, wherein the first tooth and the second tooth are disposed at both ends of the tooth body in the horizontal direction, and the plurality of intermediate teeth are disposed sequentially and spaced apart between the first tooth and the second tooth.

[0011] The first tooth has a second inclined surface, the second tooth has a first inclined surface, and each of the intermediate teeth has both a first inclined surface and a second inclined surface.

[0012] In one embodiment, on each of the intermediate teeth, the first bevel and the second bevel are arranged symmetrically in the vertical direction.

[0013] In one embodiment, the tooth body has a needle platform, and the needle hole is disposed on the needle platform;

[0014] The needle platform is configured as the first inclined surface and the second inclined surface on its two sides in the horizontal direction, respectively.

[0015] It is understandable that using a needle platform in conjunction with the feeding teeth can reduce the single-point pressure of the feeding teeth on the fabric during feeding, thus preventing the fabric from being damaged.

[0016] In one embodiment, one end face of the needle platform in the vertical direction is configured as a horizontal needle hole plane.

[0017] Understandably, the needle platform uses a horizontal needle hole plane to support the fabric, which reduces the damage to the fabric caused by the feeding teeth during feeding.

[0018] In one embodiment, one end face of each tooth in the vertical direction is configured as a horizontal tooth crest plane;

[0019] The dimension of the portion on each of the tooth tip plane used to contact and convey the fabric in the horizontal direction is set as W, where W > 0.2 mm.

[0020] Understandably, the feeding teeth use a horizontal tooth tip plane to support the fabric, which reduces the damage to the fabric during feeding.

[0021] In one embodiment, W is set to 0.3 mm.

[0022] In one embodiment, the feeding teeth have grooves that extend along the horizontal direction and penetrate through a plurality of teeth, and the grooves communicate with the pinholes.

[0023] Understandably, grooves are used to contain the stitches during fabric sewing, preventing them from being damaged during the process and thus further ensuring the product's aesthetic appeal.

[0024] In one embodiment, the number of teeth is configured to be seven, with three teeth located on one side of the pinhole and the other four teeth located on the other side of the pinhole.

[0025] In addition, this application also provides a sewing machine including the aforementioned feed teeth.

[0026] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0027] The feed tooth and sewing machine claimed in this application utilize a double-sloping tooth structure to achieve optimal force transmission in both forward and reverse stitching, avoiding force loss. This ensures stable and non-slip feeding of the feed tooth, resulting in stable stitch length, high overlap between forward and reverse stitching, and thus ensuring fabric sewing accuracy and product aesthetics. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the feeding teeth provided in this application.

[0030] Figure 2 This is a structural schematic diagram of the feeding teeth provided in this application from another perspective.

[0031] Figure 3 for Figure 2 Enlarged view of the middle P section.

[0032] Figure 4 This is a schematic diagram of the feeding teeth according to another embodiment of this application.

[0033] Reference numerals: 100, feeding tooth; 10, tooth body; 110, needle platform; 111, needle hole plane; 11, needle hole; 20, tooth; 210, first tooth; 220, second tooth; 230, intermediate tooth; 21, first inclined plane; 22, second inclined plane; 23, tooth tip plane; 30, groove. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0035] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The feed teeth 100 claimed in this application are used to feed fabric during reverse and forward stitching in a sewing machine. Here, the aforementioned sewing machine includes, but is not limited to, a combined feed sewing machine, which is used to sew high-end fabrics (not shown) such as leather and artificial leather; and, depending on the needs of the product to be sewn (including but not limited to car seats and furniture), the combined feed sewing machine requires a reverse and forward stitching mode for the fabric.

[0038] like Figures 1 to 4As shown, the feed tooth 100 claimed in this application includes a tooth body 10 and a plurality of teeth 20. The tooth body 10 has a pinhole 11 for a needle (not shown) to pass through. The plurality of teeth 20 are arranged on two opposite sides of the pinhole 11 in the horizontal direction X and connected to the tooth body 10. Specifically, the teeth 20 and the tooth body 10 can be connected as one unit. Each tooth 20 has a first inclined surface 21 and / or a second inclined surface 22 in the horizontal direction X. The plane direction of the first inclined surface 21 is used to tangent to the starting point of the forward feeding motion trajectory of the feed tooth 100. The plane direction of the second inclined surface 22 is used to tangent to the starting point of the reverse feeding motion trajectory of the feed tooth 100. Here, both the forward and reverse feeding trajectories described above are elliptical. When the elliptical trajectory is above the baseline of the upper horizontal plane of the corresponding needle plate (not shown), the teeth 20 of the feed dog 100 protrude from the needle plate and feed the fabric. It should be noted that the formation of the forward and reverse feeding trajectories of the feed dog 100 during operation and the working principle of how the feed dog 100 feeds the fabric can all adopt the conventional methods of existing integrated feeding sewing machines, and will not be elaborated here.

[0039] As can be seen from the above, the feeding tooth 100 of this application uses a double-sloping tooth structure of the first inclined surface 21 and the second inclined surface 22 to feed the fabric, so that the feeding tooth 100 can achieve optimal force transmission in the initial state of reverse and forward stitching, avoiding force loss. This ensures stable feeding of the feeding tooth 100 without slippage, so as to make the stitch distance stable and the overlap of reverse and forward stitches high, thereby ensuring the sewing accuracy of the fabric and the aesthetics of the product.

[0040] It should be noted that, since the plane of the first inclined surface 21 is perpendicular to the tangent direction of the starting point of the forward feeding trajectory of the feeding tooth 100, when the tooth 20 first begins forward feeding the fabric, it can efficiently convert all the force into a propulsive force on the fabric through the first inclined surface 21. This effectively avoids the component force loss problem common in traditional designs, fundamentally eliminating the possibility of the fabric slipping on the first inclined surface 21, and achieving the goal of improving the efficiency of force transmission. The same principle applies to the feeding when the tooth 20 first begins forward feeding the fabric using the second inclined surface 22, which will not be elaborated here.

[0041] like Figure 1 , Figure 3 and Figure 4As shown, in one embodiment, the tooth body 10 has a needle platform 110, and a needle hole 11 is disposed on the needle platform 110; furthermore, the two sides of the needle platform 110 in the horizontal direction X are respectively configured as a first inclined surface 21 and a second inclined surface 22. That is to say, the feeding tooth 100 of this embodiment can feed material in conjunction with the tooth 20 using the needle platform 110, which can reduce the single-point pressure of the feeding tooth 100 on the fabric during feeding and prevent the fabric from being damaged by pressure.

[0042] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, one end face of the needle platform 110 in the vertical direction Y is configured as a horizontal needle hole plane 111. That is, the needle platform 110 in this embodiment uses a horizontal needle hole plane 111 to support the fabric, which can reduce the damage to the fabric caused by the feed teeth 100 during fabric feeding.

[0043] like Figure 3 As shown in this application, the plurality of teeth 20 includes a first tooth 210, a second tooth 220, and a plurality of intermediate teeth 230. The first tooth 210 and the second tooth 220 are disposed at both ends of the tooth body 10 in the horizontal direction X. The plurality of intermediate teeth 230 are disposed sequentially and spaced apart between the first tooth 210 and the second tooth 220. Furthermore, the first tooth 210 has the aforementioned second inclined surface 22, the second tooth 220 has the aforementioned first inclined surface 21, and each intermediate tooth 230 has the aforementioned first inclined surface 21 and second inclined surface 22.

[0044] like Figure 3 As shown, in one embodiment, on each intermediate tooth 230, the first inclined surface 21 and the second inclined surface 22 are symmetrically arranged in the vertical direction Y. It can be understood that in other embodiments, the first inclined surface 21 and the second inclined surface 22 may also be asymmetrically arranged in the vertical direction Y, which can be specifically set according to the needs of use, and will not be elaborated here.

[0045] like Figure 3 As shown, in one embodiment, one end face of each tooth 20 in the vertical direction Y is configured as a horizontal tooth tip plane 23; and the dimension of the portion on each tooth tip plane 23 used for contacting and conveying the fabric in the horizontal direction X is set to W, where W > 0.2 mm. That is, the tooth 20 in this embodiment can carry the fabric with a larger horizontal tooth tip plane 23, thus reducing fabric loss during feeding by the feeding tooth 100. Here, W is set to 0.3 mm. It is understood that in other embodiments, W can also be set to 0.5 mm, 0.6 mm, 1.2 mm, etc., depending on the specific requirements, which will not be elaborated here.

[0046] like Figure 3 As shown, in one embodiment, the number of teeth 20 is configured to be seven, with three teeth 20 located on one side of the needle hole 11 and the other four teeth 20 located on the other side of the needle hole 11. This allows the feeding teeth 100 to be suitable for applications of integrated feeding sewing machines with a stitch length of 6mm. It is understood that in other embodiments, the number of teeth 20 on the feeding teeth 100 can also be three, five, nine, or even more. Of course, the specific number and arrangement of the teeth 20 can be specifically set according to the different stitch length requirements of the integrated feeding sewing machine, which will not be elaborated upon here. It should be noted that the different numbers of teeth 20 in the feeding teeth 100 corresponding to different stitch lengths of the integrated feeding sewing machine is a conventional method in the prior art, and will not be elaborated upon here.

[0047] like Figure 1 , Figure 4 As shown, in one embodiment, the feed tooth 100 is provided with a groove 30. The groove 30 extends along the horizontal direction X and passes through multiple teeth 20. The groove 30 communicates with the needle hole 11, so that when the feed tooth 100 is used in a comprehensive feeding sewing machine to feed the fabric, the groove 30 can be used to contain the stitches in the sewing of the fabric. This can prevent the stitches from being damaged during sewing, thereby further ensuring the aesthetics of the product.

[0048] In addition, this application also provides a sewing machine including the feed teeth 100 described above.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A feed dog for feeding fabric during backstitching in a sewing machine; characterized in that, The feeding teeth (100) include: The tooth body (10) has a needle hole (11) for the needle to pass through; Multiple teeth (20) are arranged on two opposite sides of the pinhole (11) in the horizontal direction and connected to the tooth body (10), wherein each tooth (20) has a first inclined surface (21) and / or a second inclined surface (22) in the horizontal direction. The plane direction of the first inclined surface (21) is used to be perpendicular to the tangent direction of the starting point of the forward feeding motion trajectory of the feeding tooth (100); and the plane direction of the second inclined surface (22) is used to be perpendicular to the tangent direction of the starting point of the reverse feeding motion trajectory of the feeding tooth (100).

2. The feeding tooth according to claim 1, characterized in that, The plurality of teeth (20) include a first tooth (210), a second tooth (220) and a plurality of intermediate teeth (230), wherein the first tooth (210) and the second tooth (220) are disposed at both ends of the tooth body (10) in the horizontal direction, and the plurality of intermediate teeth (230) are disposed sequentially and spaced apart between the first tooth (210) and the second tooth (220); The first tooth (210) has a second inclined surface (22), the second tooth (220) has a first inclined surface (21), and each of the intermediate teeth (230) has a first inclined surface (21) and a second inclined surface (22).

3. The feeding tooth according to claim 2, characterized in that, On each of the intermediate teeth (230), the first inclined surface (21) and the second inclined surface (22) are arranged symmetrically in the vertical direction.

4. The feeding tooth according to claim 1, characterized in that, The tooth body (10) has a needle platform (110), and the needle hole (11) is disposed on the needle platform (110); The needle platform (110) is configured as the first inclined surface (21) and the second inclined surface (22) on its two sides in the horizontal direction, respectively.

5. The feeding tooth according to claim 4, characterized in that, The needle platform (110) has one end face in the vertical direction configured as a horizontal needle hole plane (111).

6. The feeding tooth according to claim 1, characterized in that, Each of the teeth (20) has one end face in the vertical direction configured as a horizontal tooth crest plane (23); The dimension of the portion on each of the tooth tip planes (23) used to contact and convey the fabric in the horizontal direction is set as W, where W > 0.2 mm.

7. The feeding tooth according to claim 6, characterized in that, in, W is set to 0.3mm.

8. The feeding tooth according to claim 1, characterized in that, The feeding tooth (100) has a groove (30) which extends along the horizontal direction and penetrates multiple teeth (20). The groove (30) is connected to the pinhole (11).

9. The feeding tooth according to claim 1, characterized in that, The number of teeth (20) is configured to be seven, with three of the teeth (20) located on one side of the pinhole (11) and the other four teeth (20) located on the other side of the pinhole (11).

10. A sewing machine, characterized in that, Includes the feeding teeth (100) as described in any one of claims 1 to 9.

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