A sewing machine fixed knife fixed needle plate

Abstract

The utility model discloses a sewing machine fixed knife needle plate, comprising: a fixed knife bottom plate and a backing, wherein a guide groove and a mounting hole are arranged on the fixed knife bottom plate, and the backing is arranged on one side of the long side of the guide groove; a side of the guide groove close to the backing is widened to form a widened groove; wherein the overall width of the guide groove and the widened groove is 5 to 8 mm; the widening size of the widened groove ensures that the backing does not slide into the guide groove and the widened groove. The sewing machine fixed knife needle plate of the utility model can make the functional line cut smoothly and the cutting edge smooth and stable during the sewing process, thereby improving work efficiency and increasing output.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a fixed knife and fixed needle plate of a sewing machine, which is suitable for sewing with a functional line for trimming fabrics after rolling glue. Background Art

[0002] In automobile interior decoration, it is often involved to use a sewing machine to trim the fabric after rolling glue, that is, the trimming of the fabric after rolling glue is achieved by using a cutter and a backing, and the cut trimming strips are guided out through the guide groove on the fixed needle plate of the fixed knife.

[0003] like Figure 1 As shown, the existing fixed knife needle plate 1 is provided with a mounting hole 5, and is fixed at a preset position of the sewing machine by fixing screws; the guide groove 2 on the fixed knife needle plate 1 is a rectangular groove with a width of 3.5mm, and the backrest 4 is arranged at the edge close to the guide groove, that is, the backrest 4 is arranged on one side of the long side of the guide groove 2, and the distance from the nearest width side of the guide groove is about 10mm. Since the surface of the fabric after rolling is thick and the friction is large, the trimming strip (width of 3.5-3.7mm) cut by the cutter is easy to get stuck in the guide groove, and needs to be cleaned regularly, otherwise it is easy to get stuck; at the same time, due to the high temperature of the cutter position during trimming sewing, the position near the cutter is adhered and wrinkled; after sewing, the operator needs to check and trim manually after each sewing, and improper trimming will cause bulging, affecting the coating quality. Utility Model Content

[0004] In view of the shortcomings in the prior art, the utility model provides a sewing machine fixed knife and fixed needle plate suitable for sewing functional lines of fabric trimming after rolling glue, which can make the functional lines cut smoothly and the trimming smooth and stable during the sewing process, thereby improving work efficiency and increasing output.

[0005] The utility model discloses a sewing machine fixed knife fixed needle plate, comprising: a fixed knife bottom plate and a backing, wherein the fixed knife bottom plate is provided with a guide groove and a mounting hole, and the backing is arranged on one side of the long side of the guide groove; one side of the guide groove close to the backing is widened to form a widened groove; wherein,

[0006] The overall width of the guide groove and the widening groove is 5 to 8 mm;

[0007] The widening dimension of the widening groove ensures that the backrest does not slide into the guide groove and the widening groove.

[0008] As a further improvement of the present invention, the distance between the edge of the widening groove and the guide groove is 10 to 13 mm.

[0009] As a further improvement of the utility model, the maximum overlapping dimension between the widening groove and the backrest does not exceed 20% of the overall dimension of the backrest.

[0010] As a further improvement of the present invention, the width sides of the guide groove and the widening groove away from the backrest are provided with a bevel transition.

[0011] As a further improvement of the present invention, the length of the hypotenuse of the inclined surface is 10 to 15 mm.

[0012] As a further improvement of the utility model, a chamfer with an R of 2 to 4 mm is provided at the connection between the widening groove and the guide groove.

[0013] As a further improvement of the utility model, the long side of the widened groove is provided with a non-stick coating or a Teflon tape.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model semi-widens the guide groove of the fixed knife needle plate so that the trimming strip can slide out smoothly and reduce jamming; reduces the scrap rate and rework rate, improves production efficiency, and can significantly improve the problem of adhesion and wrinkles of the trimming strips; the trimming meets the quality requirements and there is no need for rework after sewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the fixed knife and needle plate of an existing sewing machine;

[0017] Figure 2 The utility model is a schematic structural diagram of a fixed knife and a fixed needle plate of a sewing machine disclosed in an embodiment.

[0018] In the figure:

[0019] 1. Fixed knife bottom plate;

[0020] 2. Guide groove;

[0021] 3. Widen the groove;

[0022] 4. Backer;

[0023] 5. Mounting holes;

[0024] 6. Incline. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0029] like Figure 2 As shown, the utility model provides a sewing machine fixed knife fixed needle plate, comprising: a fixed knife bottom plate 1 and a backing 4, the fixed knife bottom plate 1 is provided with a guide groove 2 and a mounting hole 5, the backing 4 is arranged on one side of the long side of the guide groove 2; a widened groove 3 is formed by widening one side of the guide groove 2 close to the backing 4; wherein,

[0030] The overall width a of the guide groove 2 and the widening groove 3 of the utility model is 5 to 8 mm, preferably 5 to 7 mm.

[0031] The widening size of the widening groove 3 of the utility model ensures that the backrest 3 does not slide into the guide groove 2 and the widening groove 3; wherein, the edge distance c of the widening groove 3 and the guide groove 2 is 10-13 mm, the widening groove 3 can have a certain overlap with the backrest, and the maximum overlap size does not exceed 20% of the overall size of the backrest.

[0032] The utility model provides a bevel transition on the width sides of the guide groove 2 and the widening groove 3 away from the backrest 4; wherein the bevel length b of the bevel 6 is 10-15 mm.

[0033] The connection between the widening groove 3 and the guide groove 2 of the utility model is provided with a chamfer with an R of 2 to 4 mm.

[0034] The long side of the widening groove 3 of the utility model is provided with a non-stick coating or Teflon tape, so that the cutting position is easier to operate.

[0035] The advantages of the utility model are:

[0036] The utility model semi-widens the guide groove of the fixed knife needle plate so that the trimming strip can slide out smoothly and reduce jamming; reduces the scrap rate and rework rate, improves production efficiency, and can significantly improve the problem of adhesion and wrinkles of the trimming strips; the trimming meets the quality requirements and there is no need for rework after sewing.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sewing machine fixed knife fixed needle plate, comprising: The fixed blade bottom plate and the backing are provided with a guide groove and a mounting hole, and the backing is arranged on one side of the long side of the guide groove; it is characterized in that one side of the guide groove close to the backing is widened to form a widened groove; wherein, The overall width of the guide groove and the widening groove is 5 to 8 mm; The widening dimension of the widening groove ensures that the backrest does not slide into the guide groove and the widening groove.

2. The sewing machine fixed knife fixed needle plate according to claim 1, characterized in that: The distance between the widening groove and the edge of the guide groove is 10-13 mm.

3. The sewing machine fixed knife fixed needle plate according to claim 1, characterized in that: The maximum overlap size of the widened groove and the backing does not exceed 20% of the overall size of the backing.

4. The sewing machine fixed knife fixed needle plate according to claim 1, characterized in that: The width sides of the guide groove and the widening groove away from the backrest are provided with a bevel transition.

5. The sewing machine fixed knife fixed needle plate according to claim 4, characterized in that: The length of the hypotenuse of the inclined surface is 10 to 15 mm.

6. The sewing machine fixed knife fixed needle plate according to claim 1, characterized in that: A chamfer with an R of 2 to 4 mm is provided at the connection between the widening groove and the guide groove.

7. The sewing machine fixed knife fixed needle plate according to claim 1, characterized in that: The long side of the widened groove is provided with a non-stick coating or a Teflon tape.

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