Adjustable sewing machine fixing arm

Abstract

The utility model discloses an adjustable sewing machine fixing arm, which relates to the technical field of sewing machines, and comprises a fixing arm body and an adjusting mechanism, the top end of the fixing arm body is provided with an open groove, the adjusting mechanism comprises a movable groove arranged at the bottom end of the fixing arm body, and the inner wall of the movable groove is movably connected with an extrusion block in a penetrating manner. A lifting mechanism is arranged between the extrusion block and the fixed arm body, a first limiting mechanism is arranged between the extrusion block and the fixed arm body, and a contact mechanism is arranged at the bottom end of the extrusion block. By means of the arrangement of the movable groove and the extrusion block, the extrusion block can ascend and descend in the movable groove through work of the lifting mechanism, so that the height of the extrusion block can be adjusted according to different thicknesses of cloth, and it is guaranteed that the cloth can be stably pressed down and positioned in the sewing work; the phenomenon of displacement of the cloth in the sewing processing process is avoided, so that the stability of cloth sewing processing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to an adjustable sewing machine fixed arm. Background Art

[0002] A sewing machine is a mechanical device used to sew cloth and other materials together, and is widely used in textile manufacturing and household sewing.

[0003] The fixed arm is an important component of the sewing machine. The fixed arm is also called the presser foot. It is used to clamp and fix the fabric when the sewing machine is working to ensure that the fabric will not move during the sewing process. In actual work, after the fabric is placed, the fixed arm descends to press the fabric, and then the needle descends through the fixed arm to contact the fabric for sewing. Then the needle is lifted, the fixed arm is lifted, and the fabric is moved to carry out the next sewing work.

[0004] However, the thickness of fabrics used for sewing processing varies, while the thickness of the fixed arm on the sewing machine is fixed. As a result, when thinner fabric is needed, the fixed arm cannot stably squeeze the fabric, causing the fabric to move when the needle descends, thereby reducing the stability of the fabric sewing processing. For this reason, we propose an adjustable sewing machine fixed arm. Utility Model Content

[0005] The purpose of the utility model is to provide an adjustable sewing machine fixed arm to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an adjustable sewing machine fixed arm, comprising:

[0007] A fixed arm body, wherein a slot is formed at the top of the fixed arm body;

[0008] The adjusting mechanism comprises a movable groove opened at the bottom end of the fixed arm body, the inner wall of the movable groove is movably connected with an extrusion block, a lifting mechanism is arranged between the extrusion block and the fixed arm body, a first limiting mechanism is arranged between the extrusion block and the fixed arm body, and a contact mechanism is arranged at the bottom end of the extrusion block.

[0009] Preferably, the contact mechanism comprises a rubber pad, which is attached to the bottom end of the extrusion block, and the shape of the rubber pad matches the shape of the extrusion block.

[0010] Preferably, the lifting mechanism includes a rotating hole opened at the top of the fixed arm body, the interior of the rotating hole is connected to the interior of the movable groove, the inner wall of the rotating hole is rotatably connected to an internally threaded rotating cylinder, the inner wall of the internally threaded rotating cylinder is threadedly connected to a threaded rod, and the bottom end of the threaded rod is fixedly connected to the top of the extrusion block.

[0011] Preferably, the first limiting mechanism includes a limiting hole opened at the top of the inner wall of the movable groove, the inner wall of the limiting hole is movably connected with a limiting rod, the bottom end of the limiting rod is fixedly connected to the top of the extrusion block, and the top of the limiting rod is provided with a second limiting mechanism.

[0012] Preferably, the second limiting mechanism comprises a limiting block fixedly connected to the top end of the limiting rod, a limiting groove is provided at the top end of the inner wall of the limiting hole, and the outer wall of the limiting block is slidably connected to the inner wall of the limiting groove.

[0013] Preferably, a plurality of countersunk holes are provided on the top of one side of the fixed arm body, and connection holes are provided on the inner walls of the plurality of countersunk holes.

[0014] Technical effects and advantages of the utility model:

[0015] The utility model utilizes the arrangement of the movable groove and the extrusion block, and the extrusion block can be lifted and lowered in the movable groove through the operation of the lifting mechanism, so that the height of the extrusion block can be adjusted according to the thickness of the cloth, ensuring that the cloth can be stably pressed down and positioned during sewing work, avoiding the phenomenon of cloth shifting during sewing processing, thereby improving the stability of cloth sewing processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the front side of the extrusion block of the utility model.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the extrusion block of the utility model in a top view.

[0019] In the figure: 101, fixed arm body; 201, movable groove; 202, extrusion block; 301, rubber pad; 401, rotating hole; 402, internal thread rotating cylinder; 403, threaded rod; 501, limiting hole; 502, limiting rod; 503, limiting groove; 504, limiting block; 601, countersunk hole; 602, connecting hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] The utility model provides Figure 1-3 An adjustable sewing machine fixed arm is shown, comprising a fixed arm body 101 and an adjusting mechanism. A slot is provided at the top of the fixed arm body 101, and the fixed arm body 101 is used to connect with the sewing machine. As the sewing machine works, the fixed arm body 101 descends to drive the adjusting mechanism to press against the fabric, and then the sewing machine continues to work, causing the needle to descend, pass through the slot and contact the fabric to perform sewing.

[0022] In a preferred embodiment, the adjustment mechanism includes a movable groove 201 opened at the bottom end of the fixed arm body 101, and the inner wall of the movable groove 201 is movably connected with an extrusion block 202, a lifting mechanism is arranged between the extrusion block 202 and the fixed arm body 101, and a first limiting mechanism is arranged between the extrusion block 202 and the fixed arm body 101, and a contact mechanism is arranged at the bottom end of the extrusion block 202, and the extrusion block 202 can be lifted and lowered inside the movable groove 201 by the operation of the lifting mechanism, so that the height of the extrusion block 202 can be adjusted according to the thickness of the cloth, so as to ensure that the cloth can be stably pressed down and positioned during sewing work, and avoid the phenomenon of displacement of the cloth during sewing processing, thereby improving the stability of cloth sewing processing, and the shape of the extrusion block 202 is similar to the collision of the bottom end of the fixed arm body 101, so that the extrusion surface of the extrusion block 202 is large enough, and the extruded cloth can be stably positioned, thereby ensuring that the cloth can be stably sewn.

[0023] Among them, the contact mechanism includes a rubber pad 301, and the rubber pad 301 is attached to the bottom end of the extrusion block 202. The shape of the rubber pad 301 matches the shape of the extrusion block 202. Through the setting of the rubber pad 301, when the extrusion block 202 descends, the rubber pad 301 will press against the cloth. Since the rubber pad 301 is flexible rubber, the rubber pad 301 presses against the cloth, which prevents the cloth from being hard squeezed, thereby avoiding the phenomenon of damage to the cloth during sewing processing, and improving the protective effect of the sewing processing of the cloth. At the same time, the rubber pad 301 is fixed to the bottom end of the extrusion block 202 by gluing, that is, after the rubber pad 301 is worn during the working time, the worn rubber pad 301 can be directly torn off from the bottom end of the extrusion block 202, and then a new rubber pad 301 can be replaced, thereby improving the convenience of replacing the rubber pad 301.

[0024] Preferably, the lifting mechanism includes a rotating hole 401 opened at the top of the fixed arm body 101, the interior of the rotating hole 401 is connected to the interior of the movable groove 201, the inner wall of the rotating hole 401 is rotatably connected to an internally threaded rotating cylinder 402, the inner wall of the internally threaded rotating cylinder 402 is threadedly connected to a threaded rod 403, the bottom end of the threaded rod 403 is fixedly connected to the top of the extrusion block 202, and the internally threaded rotating cylinder 402 rotates in the rotating hole 401, and then the outer wall of the threaded rod 403 and the inner wall of the internally threaded rotating cylinder 402 are threadedly engaged, and at the same time, under the cooperation of the first limiting mechanism, the threaded rod 403 can be rotated with the internally threaded rotating cylinder 402, so that the threaded rod 403 can be lifted and lowered in the internally threaded rotating cylinder 402, thereby driving the extrusion block 202 to lift and lower in the movable groove 201, and the adjusting mechanism can be operated, so that when the sewing machine is working, the fabrics to be sewn can be positioned separately, thereby improving the stability of the fabric sewing process.

[0025] Among them, the first limiting mechanism includes a limiting hole 501 opened at the top of the inner wall of the movable groove 201, the inner wall of the limiting hole 501 is movably connected with a limiting rod 502, the bottom end of the limiting rod 502 is fixedly connected to the top of the extrusion block 202, and the top of the limiting rod 502 is provided with a second limiting mechanism. The limiting hole 501 limits the limiting rod 502, so that the extrusion block 202 can only be lifted and moved in the movable groove 201, and will not rotate, which can offset the lateral force brought to the threaded rod 403 by the rotation of the internal threaded rotating cylinder 402, thereby improving the stability of the lifting mechanism.

[0026] Furthermore, the second limiting mechanism includes a limiting block 504 fixedly connected to the top of the limiting rod 502, and a limiting groove 503 is provided at the top of the inner wall of the limiting hole 501. The outer wall of the limiting block 504 is slidably connected to the inner wall of the limiting groove 503, and the width of the limiting block 504 is greater than the width of the limiting hole 501, so that the limiting block 504 will not be separated from the limiting groove 503 when moving up and down in the limiting groove 503, and the limiting rod 502 will not be separated from the limiting hole 501, thereby ensuring that the extrusion block 202 will not be separated from the movable groove 201, thereby improving the stability of the adjustment mechanism.

[0027] Furthermore, a plurality of countersunk holes 601 are provided on the top of one side of the fixed arm body 101, and a connecting hole 602 is provided on the inner wall of each of the plurality of countersunk holes 601. When the fixed arm body 101 is connected to the sewing machine, a bolt is passed through the countersunk hole 601 and the connecting hole 602 in sequence and screwed into the threaded hole on the sewing machine until the knob of the bolt is immersed in the countersunk hole 601. This completes the connection between the fixed arm body 101 and the sewing machine, so that the fixed arm body 101 can work stably on the sewing machine.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable sewing machine fixed arm, characterized in that: include: A fixed arm body (101), wherein a slot is formed at the top of the fixed arm body (101); The adjusting mechanism comprises a movable groove (201) provided at the bottom end of the fixed arm body (101); an inner wall of the movable groove (201) is movably connected with an extrusion block (202); a lifting mechanism is provided between the extrusion block (202) and the fixed arm body (101); a first limiting mechanism is provided between the extrusion block (202) and the fixed arm body (101); and a contact mechanism is provided at the bottom end of the extrusion block (202).

2. The adjustable sewing machine fixed arm according to claim 1, characterized in that: The contact mechanism comprises a rubber pad (301), the rubber pad (301) is attached to the bottom end of the extrusion block (202), and the shape of the rubber pad (301) matches the shape of the extrusion block (202).

3. The adjustable sewing machine fixed arm according to claim 1, characterized in that: The lifting mechanism comprises a rotating hole (401) opened at the top end of the fixed arm body (101), the interior of the rotating hole (401) is connected to the interior of the movable groove (201), the inner wall of the rotating hole (401) is rotatably connected to an internal threaded rotating cylinder (402), the inner wall of the internal threaded rotating cylinder (402) is threadedly connected to a threaded rod (403), and the bottom end of the threaded rod (403) is fixedly connected to the top end of the extrusion block (202).

4. The adjustable sewing machine fixed arm according to claim 1, characterized in that: The first limiting mechanism comprises a limiting hole (501) formed at the top of the inner wall of the movable groove (201); the inner wall of the limiting hole (501) is movably connected with a limiting rod (502); the bottom end of the limiting rod (502) is fixedly connected to the top of the extrusion block (202); and the top of the limiting rod (502) is provided with a second limiting mechanism.

5. The adjustable sewing machine fixed arm according to claim 4, characterized in that: The second limiting mechanism comprises a limiting block (504) fixedly connected to the top end of the limiting rod (502), a limiting groove (503) is provided at the top end of the inner wall of the limiting hole (501), and the outer wall of the limiting block (504) is slidably connected to the inner wall of the limiting groove (503).

6. The adjustable sewing machine fixed arm according to claim 1, characterized in that: A plurality of countersunk holes (601) are provided at the top of one side of the fixed arm body (101), and a connection hole (602) is provided on the inner walls of the plurality of countersunk holes (601).

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