Bird nest preventing structure of sewing machine

Abstract

Provided is an anti-nest structure of a sewing machine. Mainly solves the problems that the bird nest prevention structure of the existing sewing machine adopts an externally-mounted bird nest prevention structure, the cost is high, and the operation space is reduced. The device is characterized in that a power source (5) and a wire pulling piece (6) movably installed in the shell are arranged in the shell, the power source is used for driving the wire pulling piece to move, the wire pulling piece comprises a deflector rod (61), and part of the deflector rod extends out of the shell to be connected with the wire. According to the bird nest prevention structure of the sewing machine, a built-in structure is adopted, the space outside the shell cannot be occupied, operation is prevented from being affected, and the bird nest prevention function can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of sewing equipment, in particular to a bird nest prevention structure of a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. The so-called "bird's nest" is when the sewing machine starts sewing, the free upper thread left on the needle is rolled into the bottom surface of the cloth by the rotary shuttle, and is sewn to the bottom surface of the cloth by the subsequent sewing action, forming a bird's nest-like thread, which affects the sewing quality and appearance. Therefore, in view of the above-mentioned bird's nest, some technical solutions have been invented on the market to solve the above-mentioned technical problems.

[0003] As shown in the Chinese patent with publication (announcement) number 202010015327.1, an external anti-bird nest structure is adopted, which is costly and reduces the operating space. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides an anti-bird nest structure for a sewing machine, which mainly solves the problem that the current anti-bird nest structure of the sewing machine adopts an external anti-bird nest structure, which reduces the operating space.

[0005] The technical solution adopted by the utility model is: an anti-bird's nest structure of a sewing machine, comprising a shell, on which a thread clamp and movably matched pins are provided, thread is connected between the thread clamp and the pins, a power source and a wire pulling member movably installed in the shell are provided in the shell, the power source is used to drive the wire pulling member to move, the wire pulling member comprises a shifting rod, part of which extends out of the shell and is connected to the wire.

[0006] The power source is an electromagnetic drive.

[0007] The housing is detachably connected with a mounting plate, and the power source is mounted on the mounting plate.

[0008] A fixing seat is arranged in the shell, and the wire pulling member is rotatably mounted on the fixing seat.

[0009] It also includes a guide frame connected to the power source, a crank is provided on the wire pulling member, and the guide frame is connected to the crank to drive the wire pulling member to move.

[0010] The mounting plate is also provided with an elastic member, which is connected to the guide frame and is used to drive the guide frame to be in a first ascending position, and the power source is used to drive the guide frame to be in a second descending position.

[0011] The lever is provided with a through hole for the weaving thread to pass through.

[0012] The beneficial effects of the utility model are as follows: the utility model provides an anti-bird nest structure of a sewing machine, adopts a built-in structure, does not occupy space outside the shell, prevents operation from being affected, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model.

[0014] Figure 2 This is a partial explosion diagram of an embodiment of the utility model.

[0015] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further explained below in conjunction with the accompanying drawings: as shown in the figure, the anti-bird's nest structure of the sewing machine includes a shell 1, on which is provided a thread clamp 2 and a movably matched stitch 3, a thread 4 is connected between the thread clamp and the stitch, and a power source 5 and a wire pulling member 6 movably installed in the shell are provided in the shell, the power source is used to drive the wire pulling member to move, and the wire pulling member includes a lever 61, part of which extends out of the shell and is connected to the wire. The power source can be a small motor or a cylinder or an electromagnetic drive, etc., which is used to drive the wire pulling part to rotate, and the lever rotates accordingly. When the lever rotates, the thread is pulled back (that is, it is pulled in the opposite direction of threading, and the main purpose is to shorten the length of the thread d extending out of the stitch). Preferably, the lever can be arranged between the thread clamp and the stitch (here is the line). When the machine completes a sewing operation and starts again, the machine starts, and the electromagnet is also started at the same time. Because the thread clamp is in a closed state, the thread can only be pulled back in the direction of the needle, thereby shortening the length of the thread end protruding from the needle. Because different fabrics have different requirements for the length of the thread end, the stroke of the electromagnet is controlled to achieve the length of the thread end.

[0017] In this embodiment, as shown in the figure, the power source is an electromagnetic drive.

[0018] In this embodiment, as shown in the figure, the housing is detachably connected with a mounting plate 11, and the power source is mounted on the mounting plate. The housing can be divided into a body and a hood, and the mounting plate is mounted on the body, and can be mounted by screws or the like.

[0019] In this embodiment, as shown in the figure, a fixing seat 12 is provided in the housing, and the wire pulling member is rotatably mounted on the fixing seat. A rotating shaft or an axial hole is provided on the wire pulling member, which can be matched with the axial hole or rotating shaft on the fixing seat.

[0020] In this embodiment, as shown in the figure, it also includes a guide frame 51 connected to the power source, and a crank 62 is provided on the wire pulling member. The guide frame is connected to the crank to drive the wire pulling member to move. The tool holder is connected to the power source and moves up and down, and drives the wire pulling member to move when moving. The crank is provided with a transmission rod, and a groove matching the crank is provided on the guide frame.

[0021] In this embodiment, as shown in the figure, the mounting plate is further provided with an elastic member 111, which is connected to the guide frame and is used to drive the guide frame to a first ascending position, and the power source is used to drive the guide frame to a second descending position. The power source is used to drive the guide frame to move downward, and the spring is used to reset it back to the ascending position.

[0022] In this embodiment, as shown in the figure, the lever is provided with a through hole 611 for the weaving thread to pass through, so as to make it more convenient to pull the weaving thread.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A bird nest prevention structure for a sewing machine, comprising a housing (1), the housing being provided with a thread clamp (2) and a movable pin (3), a thread (4) being connected between the thread clamp and the pin, characterized in that: The shell is provided with a power source (5) and a wire pulling member (6) movably installed in the shell, the power source is used to drive the wire pulling member to move, the wire pulling member includes a lever (61), part of which extends out of the shell and is connected to the wire.

2. The anti-bird nest structure of a sewing machine according to claim 1, characterized in that: The power source is an electromagnetic drive.

3. The anti-bird nest structure of a sewing machine according to claim 1, characterized in that: A mounting plate (11) is detachably connected to the shell, and the power source is mounted on the mounting plate.

4. The anti-bird nest structure of a sewing machine according to claim 1, characterized in that: A fixing seat (12) is provided in the shell, and the wire pulling member is rotatably mounted on the fixing seat.

5. The anti-bird nest structure of a sewing machine according to claim 3, characterized in that: It also includes a guide frame (51) connected to the power source, a crank (62) is provided on the wire pulling member, and the guide frame is connected to the crank to drive the wire pulling member to move.

6. The anti-bird nest structure of a sewing machine according to claim 5, characterized in that: The mounting plate is also provided with an elastic member (111), which is connected to the guide frame and is used to drive the guide frame to a first ascending position, and the power source is used to drive the guide frame to a second descending position.

7. The anti-bird nest structure of a sewing machine according to any one of claims 1 to 6, characterized in that: The lever is provided with a through hole (611) for the weaving thread to pass through.

Images