Manual thread trimming switch structure of sewing machine and sewing machine

Abstract

The utility model provides a kind of manual thread cutting switch structure and sewing machine of sewing machine, belong to sewing machine equipment technical field.It solves how to make the technical problems such as the resilient stability of drive shaft on manual thread cutting switch structure.This manual thread cutting switch structure includes shell, key, drive shaft and limiting component, the key is fixedly connected with drive shaft and is slidably connected on shell, drive shaft has spring, the inner end of spring is in abutment with the side wall of key, the outer end of spring is in abutment with limiting component, drive shaft has recess one and recess two, when key is pressed to drive drive shaft to move inward, spring is rebounded to make the side wall of recess one and recess two can be in collision with limiting component and abutment.The utility model can resist impact collision after reset by limiting component, due to recess one and recess two are oppositely arranged, make limiting component abut respectively, improve the stability after reset, increase the stability of limiting component, not easy to break.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology, and relates to a manual thread-cutting switch structure for a sewing machine and a sewing machine. Background Technology

[0002] With continuous technological advancements, industrial sewing machines combine modern sewing machine technology with electronic technology, resulting in sewing machines capable of automatically starting and cutting threads. Manual thread cutting is still required when the fully automatic or semi-automatic functions are not activated.

[0003] Patent application number 201320202743.8 discloses a manual thread-cutting switch structure for a sewing machine, specifically a manual thread-cutting switch structure for a sewing machine. It is located in a cover on one side of the machine head cover, and a manual thread-cutting switch is provided in the inner cavity of the cover. The manual thread-cutting switch is triggered by a manual thread-cutting switch button. The head of the manual thread-cutting switch button is located outside the cover. The manual thread-cutting switch is connected to a controller.

[0004] The manual wire cutter switch structure described in the above literature can conveniently perform wire cutting, but it still has shortcomings. The manual wire cutter switch is in a suspended state after the reset spring returns and is not stable enough. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in the existing technology by providing a manual thread-cutting switch structure for a sewing machine and a sewing machine in general. The technical problem to be solved by this utility model is how to make the drive shaft on the manual thread-cutting switch structure spring back stably.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A manual thread-cutting switch structure for a sewing machine includes a housing, a button, a drive shaft, and a limiting component. The button is fixedly connected to the drive shaft and slidably connected to the housing. The housing and the limiting component are either an integral structure or fixedly connected. The drive shaft has a spring, the inner end of which abuts against the side wall of the button, and the outer end of the spring abuts against the limiting component. The drive shaft has two grooves, a first groove and a second groove, which are arranged opposite to each other. When the button is pressed and the drive shaft moves inward, the spring rebounds, causing the side walls of the first and second grooves to collide and abut against the limiting component.

[0008] Its working principle is as follows: The movement of the button enables the drive shaft to move, thereby controlling the wire cutting. The spring on the drive shaft resets the button after it is pressed. The limiting component is fixedly connected to the housing or is an integral structure, which improves the strength of the limiting component and ensures a stable connection. The limiting component can collide and abut with groove one and groove two respectively, so that after the drive shaft is reset by the spring, groove one and groove two collide with the limiting component, thus restricting the drive shaft to the limiting component. The limiting component can withstand the impact collision after reset. Because groove one and groove two are set opposite to each other, the limiting component abuts against each other, which improves the stability after reset and increases the stability of the limiting component, making it less prone to breakage.

[0009] In the above-mentioned manual thread-cutting switch structure of a sewing machine, the limiting component includes a limiting post one and a limiting post two, the limiting post one and the limiting post two are arranged opposite to each other, the limiting post one and the limiting post two are respectively located on both sides of the drive shaft, the side wall of the limiting post one is located in the groove one and can abut against each other, and the side wall of the limiting post two is located in the groove two and can abut against each other.

[0010] Limiting post one and limiting post two are arranged opposite each other to increase the stability of the structure when they collide with the drive shaft. They correspond to groove one and groove two respectively and have a limiting function. Limiting post one and limiting post two are located in groove one and groove two. When the drive shaft rebounds, limiting post one and limiting post two collide with groove one and groove two respectively, so that the drive shaft will not deviate and the stability of limiting post one and limiting post two is improved.

[0011] In the above-mentioned manual thread-cutting switch structure of a sewing machine, the housing is provided with a first reinforcing plate and a second reinforcing plate. The first reinforcing plate and the second reinforcing plate are both fixedly connected to the housing or are an integral structure. The first reinforcing plate is fixedly connected to a first limiting post or is an integral structure. The second reinforcing plate is fixedly connected to a second limiting post or is an integral structure.

[0012] Both reinforcing plate one and reinforcing plate two are integrally formed with the shell or fixedly connected, which improves the structural strength and stability of reinforcing plate one and reinforcing plate two. Limiting post one and limiting post two are fixedly connected with reinforcing plate one and reinforcing plate two or are integrally formed, which further improves the structural strength and stability of limiting post one and limiting post two, and can improve the ability of limiting post one and limiting post to withstand the force of the drive shaft rebound collision.

[0013] In the above-mentioned manual thread-cutting switch structure for a sewing machine, the outer surface of the housing is provided with a relief groove, which is an arc surface.

[0014] The screw is mounted on the housing, and the recessed groove facilitates the installation of a screwdriver.

[0015] In the above-mentioned manual thread-cutting switch structure for a sewing machine, the housing has a notch, and a thread-stopping block is fixedly connected to the button, with the inner end of the thread-stopping block extending into the notch.

[0016] This wire stop block can prevent wire ends from being blown into the gap between the button and the casing by the wind or by hand, thus effectively preventing wire ends that have entered the gap from being pulled away from the button by external force and breaking the button.

[0017] Another objective of this utility model is to provide a sewing machine that includes the manual thread-cutting switch structure of any of the above-mentioned sewing machines.

[0018] Compared with the prior art, the advantages of this utility model are as follows:

[0019] 1. The limiting components of this manual wire cutter switch structure can respectively collide and abut with groove one and groove two, so that after the drive shaft is reset by the spring, groove one and groove two collide with the limiting components, thus restricting the drive shaft to the limiting components. The limiting components can withstand the impact collision after reset. Since groove one and groove two are arranged opposite each other, the limiting components abut against each other, which improves the stability after reset, increases the stability of the limiting components, and makes them less prone to breakage.

[0020] 2. The first and second limit posts of this manual wire cutter switch structure collide with the first and second grooves respectively, preventing the drive shaft from shifting and improving the stability of the first and second limit posts.

[0021] 3. The limiting post 1 and limiting post 2 of this manual wire cutter switch structure are fixedly connected to the reinforcing plate 1 and reinforcing plate 2 or are an integral structure, which further improves the strength and stability of the limiting post 1 and limiting post 2 structure, and can improve the limiting post 1 and limiting post 2 in bearing the force of the drive shaft rebound collision. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the manual wire cutter switch.

[0023] Figure 2 This is a partial structural diagram of the manual wire cutter switch.

[0024] Figure 3 This is a partial structural diagram of the manual wire cutter switch.

[0025] Figure 4 This is a partial structural diagram of the manual wire cutter switch.

[0026] In the diagram, 1 is the housing; 2 is the button; 3 is the drive shaft; 4 is the limiting component; 5 is the spring; 6 is the first groove; 7 is the second groove; 8 is the first limiting post; 9 is the second limiting post; 10 is the first reinforcing plate; 11 is the second reinforcing plate; 12 is the clearance groove; 13 is the notch; and 14 is the wire blocking block. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] Example 1

[0029] like Figure 1 and 4 As shown, the manual wire cutter switch structure includes a housing 1, a button 2, a drive shaft 3, and a limiting component 4. The button 2 is fixedly connected to the drive shaft 3 and slidably connected to the housing 1. The housing 1 and the limiting component 4 are either an integral structure or fixedly connected. The drive shaft 3 has a spring 5. The inner end of the spring 5 abuts against the side wall of the button 2, and the outer end of the spring 5 abuts against the limiting component 4. The drive shaft 3 has a first groove 6 and a second groove 7, which are arranged opposite to each other. When the button 2 is pressed and the drive shaft 3 moves inward, the spring 5 is compressed so that the side walls of the first groove 6 and the second groove 7 can collide and abut against the limiting component 4. Moving button 2 causes drive shaft 3 to move, thereby controlling wire cutting. Spring 5 on drive shaft 3 causes button 2 to reset after being pressed and released. Limiting component 4 is fixedly connected to housing 1 or is an integral structure, which improves the strength of limiting component 4 and ensures stable connection. Limiting component 4 can collide and abut with groove 6 and groove 7 respectively, so that after drive shaft 3 is reset by spring 5, groove 6 and groove 7 collide with limiting component 4, thus restricting drive shaft 3 to limiting component 4. Limiting component 4 can withstand the impact collision after reset. Because groove 6 and groove 7 are arranged opposite each other, limiting component 4 abuts against each other, improving the stability after reset and increasing the stability of limiting component 4, making it less prone to breakage.

[0030] like Figure 1 and 2As shown, the limiting component 4 includes a first limiting post 8 and a second limiting post 9, which are arranged opposite to each other. The first limiting post 8 and the second limiting post 9 are located on opposite sides of the drive shaft 3. The sidewall of the first limiting post 8 is located within the first groove 6 and can abut against each other, while the sidewall of the second limiting post 9 is located within the second groove 7 and can abut against each other. The opposite arrangement of the first limiting post 8 and the second limiting post 9 increases the stability of the structure when they collide with the drive shaft 3. Corresponding to the first groove 6 and the second groove 7 respectively, the first limiting post 8 and the second limiting post 9 have a limiting function. Located within the first groove 6 and the second groove 7, when the drive shaft 3 rebounds, the first limiting post 8 and the second limiting post 9 collide with the first groove 6 and the second groove 7 respectively, preventing the drive shaft 3 from shifting and improving the stability of the first limiting post 8 and the second limiting post 9.

[0031] like Figure 1 and 2 As shown, the housing 1 is provided with a first reinforcing plate 10 and a second reinforcing plate 11. Both the first reinforcing plate 10 and the second reinforcing plate 11 are fixedly connected to the housing 1 or are an integral structure. The first reinforcing plate 10 is fixedly connected to the first limiting post 8 or is an integral structure, and the second reinforcing plate 11 is fixedly connected to the second limiting post 9 or is an integral structure. The fact that the first reinforcing plate 10 and the second reinforcing plate 11 are both integral structures or fixedly connected to the housing 1 improves the structural strength and stability of the first reinforcing plate 10 and the second reinforcing plate 11. The fact that the first limiting post 8 and the second limiting post 9 are fixedly connected to the first reinforcing plate 10 and the second reinforcing plate 11 or are an integral structure further improves the structural strength and stability of the first limiting post 8 and the second limiting post 9, and can improve the ability of the first limiting post 8 and the limiting post to withstand the force of the rebound collision of the drive shaft 3.

[0032] like Figure 3 As shown, the outer surface of the housing 1 is provided with a relief groove 12, which is an arc surface. Screws are installed on the housing 1, and the relief groove 12 facilitates the installation of screwdrivers.

[0033] like Figure 3 As shown, the housing 1 has a notch 13, and a wire stop block 14 is fixedly connected to the button 2. The inner end of the wire stop block 14 extends into the notch 13. The wire stop block 14 can prevent the wire end from being blown into the gap between the button 2 and the housing by the wind or by hand, thereby effectively preventing the wire end brought into the gap from being pulled away from the button 2 by external force and thus breaking the button 2.

[0034] Example 2

[0035] The general content of this embodiment is the same as that of embodiment 1, except that: in this embodiment, a sewing machine is provided, including any of the manual thread-cutting switch structures in embodiment 1.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A manual thread-cutting switch structure for a sewing machine, the manual thread-cutting switch structure comprising a housing (1), a button (2), a drive shaft (3), and a limiting component (4), wherein the button (2) is fixedly connected to the drive shaft (3) and slidably connected to the housing (1), the housing (1) and the limiting component (4) are an integral structure or fixedly connected, the drive shaft (3) has a spring (5), the inner end of the spring (5) abuts against the side wall of the button (2), and the outer end of the spring (5) abuts against the limiting component (4), characterized in that, The drive shaft (3) has a first groove (6) and a second groove (7), which are arranged opposite to each other. When the button (2) is pressed to drive the drive shaft (3) to move inward, the spring (5) rebounds so that the sidewalls of the first groove (6) and the second groove (7) can collide and abut against the limiting component (4).

2. The manual thread-cutting switch structure for a sewing machine according to claim 1, characterized in that, The limiting component (4) includes a limiting post one (8) and a limiting post two (9). The limiting post one (8) and the limiting post two (9) are arranged opposite to each other. The limiting post one (8) and the limiting post two (9) are located on both sides of the drive shaft (3). The side wall of the limiting post one (8) is located in the groove one (6) and can abut against each other. The side wall of the limiting post two (9) is located in the groove two (7) and can abut against each other.

3. The manual thread-cutting switch structure for a sewing machine according to claim 2, characterized in that, The housing (1) is provided with a first reinforcing plate (10) and a second reinforcing plate (11). The first reinforcing plate (10) and the second reinforcing plate (11) are fixedly connected to the housing (1) or are an integral structure. The first reinforcing plate (10) is fixedly connected to the first limiting post (8) or is an integral structure. The second reinforcing plate (11) is fixedly connected to the second limiting post (9) or is an integral structure.

4. The manual thread-cutting switch structure for a sewing machine according to claim 1, characterized in that, The outer side of the housing (1) is provided with a relief groove (12), which is an arc surface.

5. The manual thread-cutting switch structure for a sewing machine according to claim 1, characterized in that, The housing (1) has a notch (13), and a wire-blocking block (14) is fixedly connected to the button (2), with the inner end of the wire-blocking block (14) extending into the notch (13).

6. A sewing machine, characterized in that, The sewing machine includes the manual thread-cutting switch structure of the sewing machine according to any one of claims 1-5.

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