CN220034865U - Middle presser foot assembly and sewing equipment - Google Patents

Abstract

The utility model discloses a middle presser foot assembly and a sewing device, and relates to the technical field of sewing devices. The middle presser foot assembly comprises a middle presser foot, the middle presser foot comprises a presser foot arm and a presser foot head fixed on one side of the bottom end of the presser foot arm, the middle part of the presser foot head is provided with a needle mounting hole in a penetrating mode along the up-down direction, and the top surface of the presser foot head and one side, far away from the presser foot arm, of the presser foot head are provided with a line positioning groove. Because the upper surface of the presser head is provided with the thread locating groove, the upper thread can fall into the relatively lower thread locating groove on the presser head under the action of gravity and inertia in the empty needle sewing process, so that the upper thread can not move randomly on the top surface of the presser head but is restrained in the thread locating groove, accordingly, the upper thread is restrained from swinging randomly relative to the needle, the upper thread can be prevented from swinging towards the back of the needle, the empty needle is prevented from sewing and breaking, and normal thread collection is not influenced.

Description

Middle presser foot assembly and sewing equipment

Technical Field

The utility model relates to the technical field of sewing equipment, in particular to a middle presser foot assembly and sewing equipment.

Background

In the empty needle sewing process of the template machine, because the needle is in the needle hole plate penetrating, the needle moves downwards at a high speed, meanwhile, the thread taking-up lever moves downwards, the upper thread is in a loose state, the upper thread on the needle plate can be randomly thrown, and because no structures or objects such as sewing cloth are used as barriers, the upper thread below the needle plate can be thrown towards the back of the needle hole, and the front thread and the rear thread of the needle hole are hooked easily when the rotating shuttle hooks the thread, so that the upper thread is broken.

Therefore, how to reduce the possibility of broken thread of the upper thread when the empty needle is sewn is a technical problem that the person skilled in the art needs to solve at present.

Disclosure of Invention

Accordingly, the present utility model is directed to a middle presser foot assembly and a sewing apparatus, which can reduce the possibility of broken thread of an upper thread during empty needle sewing.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a well presser foot subassembly, includes well presser foot, well presser foot includes the presser foot arm and is fixed in the presser foot head of presser foot arm bottom one side, the middle part of presser foot head runs through along the upper and lower direction and sets up the needle mounting hole, the top surface of presser foot head, be away from one side of presser foot arm is seted up the line constant head tank.

Preferably, the wire positioning groove is arranged in a penetrating manner along a horizontal direction and is communicated with the needle mounting hole.

Preferably, the line positioning groove is a tapered groove with the side wall of each groove gradually folded from top to bottom towards the middle.

Preferably, each groove side wall of the line locating groove is planar.

Preferably, the bottom of the line positioning groove is a plane.

Preferably, the outer periphery of the upper half of the presser foot head is arranged in a protruding manner relative to the outer periphery of the lower half of the presser foot head so as to form a step structure, and the wire positioning groove is arranged on the step structure.

Preferably, the depth of the line locating groove is greater than half the height of the step structure.

Preferably, a needle is arranged in the needle mounting hole; the penetrating direction of the needle hole on the needle and the arrangement direction of the needle and the line positioning groove are two directions intersecting horizontally.

A sewing apparatus comprises the above middle presser foot assembly.

The middle presser foot assembly comprises a middle presser foot, wherein the middle presser foot comprises a presser foot arm and a presser foot head fixed on one side of the bottom end of the presser foot arm, a needle mounting hole is arranged in the middle of the presser foot head in a penetrating manner along the up-down direction, and a line positioning groove is formed in the top surface of the presser foot head and one side, far away from the presser foot arm.

Because the upper surface of the presser head is provided with the thread locating groove, the upper thread can fall into the relatively lower thread locating groove on the presser head under the action of gravity and inertia in the empty needle sewing process, so that the upper thread can not move randomly on the top surface of the presser head but is restrained in the thread locating groove, accordingly, the upper thread is restrained from swinging randomly relative to the needle, the upper thread can be prevented from swinging towards the back of the needle, the empty needle is prevented from sewing and breaking, and normal thread collection is not influenced.

The sewing equipment comprising the middle presser foot assembly provided by the utility model can reduce the possibility of broken upper threads during empty needle sewing.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a part of a sewing machine according to a first embodiment of the present utility model;

FIG. 2 is a schematic view showing a sewing apparatus according to an embodiment of the present utility model in which an upper thread falls into a thread positioning groove;

FIG. 3 is a partial side view of a first embodiment of a midfoot assembly according to the utility model;

fig. 4 is a schematic view of a middle presser structure of a first embodiment of the middle presser assembly according to the present utility model;

fig. 5 is a top view of a middle presser of a first embodiment of the middle presser assembly according to the present utility model.

Reference numerals:

middle presser foot 1, presser foot arm 11, presser foot head 12, needle mounting hole 121, wire positioning groove 122, groove sidewall 1221, groove bottom 1222, step structure 123;

a needle 2 and a needle hole 21;

needle bar thread loop 3;

a wire guide 4;

and an upper thread 5.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The core of the utility model is to provide a middle presser foot assembly and a sewing device, which can reduce the possibility of broken upper threads during empty needle sewing.

Referring to fig. 1 to 5, the embodiment of the middle presser foot assembly provided by the utility model includes a middle presser foot 1, the middle presser foot 1 includes a presser foot arm 11 and a presser foot head 12 fixed on one side of the bottom end of the presser foot arm 11, a needle mounting hole 121 is provided in the middle of the presser foot head 12 in a penetrating manner along the up-down direction, and a wire positioning groove 122 is provided on one side of the top surface of the presser foot head 12 away from the presser foot arm 11.

Specifically, as shown in fig. 5, the presser foot arm 11 is fixed to one end of the top surface of the presser foot head 12, and the thread positioning groove 122 is provided on the side of the top surface of the presser foot head 12 away from the presser foot arm 11. Generally, in the sewing apparatus, as shown in fig. 2, the upper thread 5 sequentially passes through the thread guide 4 and the needle bar passing ring 3 and then enters the needle 2, and the thread guide 4, the needle bar and the presser foot arm 11 are positioned at two sides of the needle 2, so that the thread positioning groove 122 is arranged at one side of the top surface of the presser foot head 12 far away from the presser foot arm 11, the adaptability to the direction of the upper thread 5 is higher, the upper thread 5 can more easily fall into the thread positioning groove 122, and the positioning effect of the upper thread 5 can be ensured.

Because the upper surface of the presser head 12 is provided with the thread positioning groove 122, the upper thread 5 can fall into the thread positioning groove 122 relatively lower on the presser head 12 under the action of gravity and inertia in the empty needle sewing process, so that the upper thread 5 can not move randomly on the top surface of the presser head 12 but be restrained in the thread positioning groove 122, accordingly, the upper thread 5 is restrained from swinging randomly relative to the needle 2, the upper thread 5 can be prevented from swinging towards the back of the needle 2, the empty needle sewing thread breakage is prevented, and the normal thread collection is not influenced.

Further, as shown in fig. 2 to 5, the thread locating groove 122 is provided to penetrate in a horizontal direction (e.g., direction B in fig. 1), and the thread locating groove 122 is connected to the needle mounting hole 121, so that the upper thread can directly enter the thread locating groove 122 through the needle 3 in the needle mounting hole 121, and the space in the thread locating groove 122 in which the upper thread 5 can be placed can be enlarged. Of course, in other embodiments, the wire positioning slot 122 may be a non-through slot in the horizontal direction.

Further, as shown in fig. 3 to 5, the wire positioning groove 122 is a tapered groove in which each groove side wall 1221 gradually tapers from top to bottom toward the middle, so that the groove side wall 1221 of the wire positioning groove 122 has a guiding function.

Further, as shown in fig. 3 and 4, each slot sidewall 1221 of the wire positioning slot 122 is planar for ease of processing. Of course, in other embodiments, the slot sidewall 1221 of the wire positioning slot 122 may be arcuate.

Further, as shown in fig. 3, the groove bottom 1222 of the thread locating groove 122 is planar, which ensures that the thread locating groove 122 has a large enough space and facilitates the removal of the upper thread. Specifically, the wire positioning groove 122 has a trapezoidal structure. Of course, in other embodiments, the line positioning groove 122 may be a triangular groove with a line at the bottom.

Further, as shown in fig. 3 and 4, the outer periphery of the upper half of the presser foot head 12 is provided to protrude with respect to the outer periphery of the lower half thereof to constitute a step structure 123, and the thread positioning groove 122 is provided on the step structure 123, so that there are enough positions on the presser foot head 12 to provide the thread positioning groove 122.

Further, as shown in fig. 3, the depth of the wire positioning groove 122 is greater than half the height of the step structure 123, so that the positioning ability of the wire positioning groove 122 can be ensured. Of course, in other embodiments, the depth of the line detent 122 may also be less than half the height of the step structure 123.

Further, as shown in fig. 1, the needle 2 is provided in the needle mounting hole 121. The penetrating direction of the needle hole 21 on the needle 2 and the arrangement direction of the needle 2 and the wire positioning groove 122 are two directions intersecting horizontally, and referring to fig. 1, the penetrating direction of the needle hole 21 on the needle 2 is the a direction, and the arrangement direction of the needle 2 and the wire positioning groove 122 is the B direction. The two directions in the penetrating direction of the needle hole 21 are the front and back surfaces of the needle 2 and the needle hole 21, and the thread locating groove 122 is arranged on one side of the needle 2 in a staggered manner, so that after the upper thread 5 falls into the thread locating groove 122, the front and back surfaces of the needle 2 and the needle hole 21 can be staggered, and the swing of the upper thread 5 to the back surface of the needle hole 21 can be avoided more reliably.

In the middle presser foot assembly in this embodiment, the presser foot 1 has a simple structure, the top surface of the presser foot head 12 of the middle presser foot 1 is provided with a thread positioning groove 122, the shaking of the upper thread 5 can be prevented in the empty needle sewing process, the upper thread 5 is relaxed after passing through the lower needle position and before rotating the shuttle to hook the thread in the empty needle sewing process, but the upper thread 5 can fall into the thread positioning groove 122 of the middle presser foot 1 under the driving of inertia, the positioning is reliable, the thread positioning groove 122 can stop the upper thread 5 from swinging towards the back of the upper thread 2, the broken thread of the empty needle sewing is prevented, and the normal thread collecting is not influenced.

In addition to the above-mentioned middle presser foot assembly, the present utility model also provides a sewing device, which includes the middle presser foot assembly, and the middle presser foot assembly may be specifically a middle presser foot assembly provided in any of the above embodiments, and the beneficial effects may be referred to above embodiments correspondingly. The structure of other parts of the sewing device is referred to the prior art, and will not be described herein.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.

The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The middle presser foot assembly and the sewing equipment provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (9)

1. The utility model provides a well presser foot subassembly, its characterized in that includes well presser foot (1), well presser foot (1) include presser foot arm (11) and be fixed in presser foot head (12) of presser foot arm (11) bottom one side, the middle part of presser foot head (12) runs through along upper and lower direction and sets up needle mounting hole (121), the top surface of presser foot head (12), keep away from presser foot arm (11) one side is seted up line constant head tank (122).

2. The medium pressure leg assembly according to claim 1, wherein the wire positioning groove (122) is provided through in a horizontal direction and communicates with the needle mounting hole (121).

3. The midfoot assembly of claim 2, wherein the wire positioning groove (122) is a tapered groove with each groove sidewall (1221) tapering from top to bottom toward the middle.

4. A midfoot assembly according to claim 3, wherein each slot sidewall (1221) of the wire positioning slot (122) is planar.

5. The midfoot assembly of claim 4, wherein a bottom (1222) of the wire positioning groove (122) is planar.

6. The medium presser foot assembly of any one of claims 1 to 5, characterized in that the outer periphery of the upper half of the presser foot head (12) is provided convexly with respect to the outer periphery of the lower half thereof to constitute a step structure (123), the wire positioning groove (122) being provided on the step structure (123).

7. The midfoot assembly according to claim 6, wherein the wire positioning groove (122) has a depth greater than half the height of the step structure (123).

8. The medium leg assembly according to any one of claims 1 to 5, wherein a needle (2) is provided in the needle mounting hole (121); the penetrating direction of the needle hole (21) on the needle (2) and the arrangement direction of the needle (2) and the line positioning groove (122) are two directions which are intersected horizontally.

9. A sewing apparatus comprising the midfoot assembly of any one of claims 1 to 8.