Thread guiding mechanism for sewing machine

Abstract

The utility model relates to the technical field of sewing machines, in particular to a thread guiding mechanism for a sewing machine, which comprises a sewing machine body, a thread guiding component is fixedly mounted at the top end of the sewing machine body, and a limiting mechanism is fixedly connected to one end of the top end of the sewing machine body and comprises a supporting plate. The supporting plate is fixedly installed at one end of the sewing machine body, a baffle is installed at the top end of the supporting plate, a clamping mechanism is rotationally connected to the interior of the limiting mechanism, the clamping mechanism comprises multiple pay-off rods, and the multiple pay-off rods are installed at the top end of the supporting plate and located at the bottom end of the baffle. According to the utility model, through the mutual matching between the internal parts of the limiting mechanism and the internal parts of the clamping mechanism, the thread barrel can be clamped and fixed on the pay-off rod, so that when the pay-off rod rotates to drive the thread barrel to pay off, the thread barrel does not rotate and jump on the outer wall of the pay-off rod, and the problem that the tightness of sewing threads is not uniform is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a thread guide mechanism for sewing machines. 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 material are interwoven or sewn together; a sewing machine can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. The sewing machine will need to use threads of different colors during the sewing process, and threading is an operation procedure that is often involved in sewing machine operations. Processing items through correct threading helps the sewing machine to complete the sewing work efficiently.

[0003] After searching, a utility model patent with publication number CN 220767369 U specifically discloses a thread guide device for a sewing machine, including a thread guide frame, a plurality of thread pay-off rods and a wire guide plate. The thread guide frame is installed on the sewing machine, and the plurality of thread pay-off rods are evenly arranged on the thread guide frame. One end of the thread pay-off rod is in a truncated cone shape, and the other end of the thread pay-off rod is rotatably connected to the thread guide frame. The wire guide plate is C-shaped, and both ends of the wire guide plate are hinged to the thread guide frame. The wire guide plate is provided with a plurality of mounting grooves corresponding to the plurality of thread pay-off rods one by one. A spring is installed in the mounting groove, and a wire ball matched with the mounting groove is rotatably connected to the spring. A positioning groove surrounding the wire ball is provided on the wire guide ball, and the inner wall of the positioning groove is covered with a sponge pad. The beneficial effects of the utility model are to avoid the occurrence of interlaced and chaotic thread guides and wrong thread guides when threads of different colors are used, and to adjust the tension of the thread used in the sewing process, so as to avoid the thread being too tight and easy to break, so as to facilitate continuous and efficient sewing work, improve work efficiency, and increase practicality.

[0004] The above patent only uses a wire pay-off rod and a wire guide plate to avoid the situation where different colored wires are intertwined and confused when in use, thereby improving work efficiency and increasing practicality. However, the above device cannot clamp and limit the wire barrel when in use, so that when the wire barrel rotates to pay off the wire, the wire barrel rotates on the wire pay-off rod, causing the wire barrel to jump up and down. As a result, when the sewing machine is in use, the tightness of the sewing thread released by the wire barrel is uneven, affecting the efficiency and quality of the sewing work, resulting in a low pass rate of the sewn pattern or product.

[0005] Therefore, it is necessary for us to propose a thread guide mechanism for a sewing machine to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a thread guide mechanism for a sewing machine, which can complete the limiting operation of the thread barrel through the mutual cooperation between the internal parts of the limiting mechanism, and at the same time, the thread barrel can be clamped and fixed on the thread release rod through the mutual cooperation between the internal parts of the clamping mechanism, so as to solve the problem in the prior art that the thread barrel rotates on the thread release rod, causing the thread barrel to jump up and down, resulting in different tightness of the sewing thread released by the thread barrel when the sewing machine is in use, affecting the efficiency and quality of the sewing work.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thread guide mechanism for a sewing machine, comprising a sewing machine body, a thread guide assembly being fixedly mounted on the top of the sewing machine body, a limiting mechanism being fixedly connected to one end of the top of the sewing machine body and located at one end of the thread guide assembly, a clamping mechanism being rotatably connected inside the limiting mechanism.

[0008] The limiting mechanism includes a support plate, which is installed and fixed to one end of the sewing machine body, a baffle is installed on the top of the support plate, and the bottom end of the baffle is connected and fixed with fixed plates on both sides and penetrates into the interior of the support plate, connecting columns are slidably connected to the two sides of the support plate and penetrate into the interior of the support plate, one side of the connecting column is connected and fixed with a contraction spring and is located in the interior of the support plate, two ends of the connecting column are installed with conical blocks and slidably connected to the interior of the support plate, one end of the conical block away from the connecting column is connected and fixed to the support column and is located in the interior of the support plate, one side of the top end of the support column is connected and fixed with the fixed block and penetrates the support plate to the interior of the fixed plate, and one side of the support column away from the fixed block and the conical block is connected and fixed with a supporting spring and is located in the interior of the support plate.

[0009] The clamping mechanism includes a wire-paying rod, and there are multiple wire-paying rods. The multiple wire-paying rods are installed on the top of the support plate and located at the bottom end of the baffle. The top of the wire-paying rod is slidably connected with a telescopic column and passes through the interior of the wire-paying rod. The bottom end of the wire-paying rod is connected and fixed with a rotating shaft and is rotatably connected to the interior of the support plate. The interior of the wire-paying rod is connected and fixed with a telescopic spring and is located at the bottom end of the telescopic column. The interior of the wire-paying rod is slidably connected with a slider and is respectively located on both sides of the bottom end of the telescopic column. The top of the slider is connected and fixed with a limit plate and is located inside the wire-paying rod. One side of the limit plate is connected and fixed with a limit spring, and the side of the slider away from the telescopic column is connected and fixed with a clamping blade, and passes through the wire-paying rod to the outer wall of the wire-paying rod.

[0010] Preferably, a connecting groove matching the fixing plate is formed at the top of the supporting plate, fixing grooves matching the fixing blocks are formed at both ends of the fixing plate, and a supporting groove matching the connecting column is formed inside the supporting plate.

[0011] Preferably, the connecting column has a chamfer with an inclined angle on one side close to the conical block, the conical block has an arc surface matching the chamfer of the connecting column on the contacting side of the connecting column, and the support plate has a support groove matching the support column inside.

[0012] Preferably, the inside of the wire-release rod is provided with a telescopic groove matching the telescopic column, the contact surface of the telescopic column and the slider are both provided with arc surfaces, the inside of the wire-release rod is provided with a limit groove matching the limit plate, and the outer wall of the wire-release rod is provided with a storage groove matching the clamping blade.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] The cam is then moved to a position where the spring forces the support column to move relative to the support column, and the cam is moved to a position where the support column is moved ...

[0015] 2. The baffle plate and the support plate are connected and fixed to each other, so that the baffle plate and the top of the wire-paying rod are fitted together, and the telescopic column is squeezed, so that the telescopic column squeezes the telescopic spring to contract and move, and the telescopic column moves to squeeze the slider, so that the slider drives the limit plate to squeeze the limit spring to contract and move, and the slider moves to replace the clamping blade to move, so that the clamping blade extends from the inside of the wire-paying rod and fits with the wire barrel sleeved on the outer wall of the wire-paying rod, so that the clamping blade completes the clamping and fixing of the wire barrel sleeved on the outer wall of the wire-paying rod, and at the same time, the wire-paying rod rotates on the support plate through the rotating shaft at the bottom end, so that when the wire-paying rod rotates to drive the wire barrel to pay off the wire, the wire barrel will not rotate and jump on the outer wall of the wire-paying rod, causing the problem of uneven tightness of the sewing thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of the connection structure between the support plate and the baffle of the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the support plate of the utility model;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the wire-laying rod of the utility model;

[0021] Figure 5 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 6 For the utility model Figure 4 Enlarged structural diagram at B in the middle.

[0023] Description of reference numerals:

[0024] 1. Sewing machine body; 101. Lead assembly; 2. Limiting mechanism; 201. Support plate; 202. Baffle; 203. Fixed plate; 204. Connecting column; 205. Contraction spring; 206. Fixed block; 207. Support column; 208. Support spring; 209. Conical block; 3. Clamping mechanism; 301. Pay-off rod; 302. Telescopic column; 303. Rotating shaft; 304. Telescopic spring; 305. Sliding block; 306. Limiting plate; 307. Limiting spring; 308. Clamping blade. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-6 The thread guide mechanism for a sewing machine shown in the figure includes a sewing machine body 1, a thread guide assembly 101 is fixedly installed on the top of the sewing machine body 1, one end of the top of the sewing machine body 1 is connected and fixed to a limiting mechanism 2, and is located at one end of the thread guide assembly 101, and a clamping mechanism 3 is rotatably connected inside the limiting mechanism 2.

[0027] The limiting mechanism 2 includes a support plate 201, which is fixed to one end of the sewing machine body 1, a baffle 202 is installed on the top of the support plate 201, and the bottom of the baffle 202 is connected and fixed with fixed plates 203 on both sides and penetrates into the support plate 201, and connecting columns 204 are slidably connected to both sides of the support plate 201 and penetrate into the support plate 201. A contraction spring 205 is connected and fixed to one side of the connecting column 204 and is located inside the support plate 201, and conical blocks 209 are installed at both ends of the connecting column 204, and It is slidably connected to the inside of the support plate 201, and the end of the conical block 209 away from the connecting column 204 is connected and fixed to the support column 207 and is located inside the support plate 201. One side of the top of the support column 207 is connected and fixed to the fixed block 206, and passes through the support plate 201 to the inside of the fixed plate 203. The support column 207 is away from the fixed block 206 and the side of the conical block 209 is connected and fixed to the support spring 208, and is located inside the support plate 201. The limiting operation of the line barrel can be completed through the mutual cooperation between the internal parts of the limiting mechanism 2.

[0028] The clamping mechanism 3 includes a wire-releasing rod 301, and there are multiple wire-releasing rods 301. The multiple wire-releasing rods 301 are installed on the top of the support plate 201 and are located at the bottom of the baffle 202. The top of the wire-releasing rod 301 is slidably connected to a telescopic column 302 and penetrates into the inside of the wire-releasing rod 301. The bottom end of the wire-releasing rod 301 is connected and fixed with a rotating shaft 303 and is rotatably connected to the inside of the support plate 201. The inside of the wire-releasing rod 301 is connected and fixed with a telescopic spring 304 and is located at the bottom of the telescopic column 302. The inside of the wire-releasing rod 301 is slidably connected with a slider 3 05, and are respectively located on both sides of the bottom end of the telescopic column 302, the top of the slider 305 is connected to a fixed limit plate 306, and is located inside the wire-paying rod 301, one side of the limit plate 306 is connected to a fixed limit spring 307, and the side of the slider 305 away from the telescopic column 302 is connected to a clamping blade 308, and penetrates the wire-paying rod 301 to the outer wall of the wire-paying rod 301, and at the same time, through the mutual cooperation between the internal parts of the clamping mechanism 3, the height position of the wire barrel can be clamped and fixed, thereby reducing the rotation and jumping of the wire barrel when the wire-paying rod 301 rotates.

[0029] The limiting operation of the wire barrel can be completed by the mutual cooperation between the internal parts of the limiting mechanism 2, and the height position of the wire barrel can be clamped and fixed by the mutual cooperation between the internal parts of the clamping mechanism 3.

[0030] Refer to the instruction manual Figure 1-6A connecting groove matching the fixing plate 203 is provided at the top of the supporting plate 201, fixing grooves matching the fixing block 206 are provided at both ends of the fixing plate 203, and a supporting groove matching the connecting column 204 is provided inside the supporting plate 201. The fixing grooves at both ends of the fixing plate 203 facilitate the connection and fixation between the fixing plate 203 and the supporting plate 201.

[0031] Refer to the instruction manual Figure 1-6 A chamfer with an inclined angle is provided on one side of the connecting column 204 close to the conical block 209, and a circular arc surface matching the chamfer of the connecting column 204 is provided on the side of the conical block 209 in contact with the connecting column 204. A supporting groove matching the supporting column 207 is provided inside the support plate 201. The supporting groove provided inside the support plate 201 facilitates the conical block 209 to push the supporting column 207 to drive the fixed block 206 to move.

[0032] Refer to the instruction manual Figure 1-6 The inside of the wire-releasing rod 301 is provided with a telescopic groove matching the telescopic column 302, the contact surface of the telescopic column 302 and the slider 305 are both provided with arc surfaces, the inside of the wire-releasing rod 301 is provided with a limit groove matching the limit plate 306, and the outer wall of the wire-releasing rod 301 is provided with a storage groove matching the clamping blade 308. The contact surface of the telescopic column 302 and the slider 305 is provided with an arc surface, which facilitates the movement of the telescopic column 302 to squeeze the slider 305 to move through the arc surface.

[0033] How this utility works:

[0034] Refer to the instruction manual Figure 1-6, by sleeve-connecting the wire barrel to the outer wall of the wire-releasing rod 301, and then placing the baffle 202 on the support plate 201 through the fixing plate 203, the fixing plate 203 is moved to the inside of the support plate 201, and the fixing block 206 is squeezed, so that the fixing block 206 pushes the support column 207 to squeeze the support spring 208 to shrink and move, so that the fixing block 206 moves to remove the obstruction of the fixing plate 203. After the fixing plate 203 is completely moved to the inside of the support plate 201, the fixing plate 203 drives the baffle 202 to fit the top of the support plate 201 against each other, and at the same time, the fixing block 206 releases the squeezing of the support column 207, so that the support spring 208 is reset to push the support column 207 to move and drive the fixing block 206 to move to The connection and fixation between the baffle plate 202 and the support plate 201 can be completed inside the fixed plate 203, and the limit of the wire barrel on the wire-releasing rod 301 can be completed. The connecting column 204 is pressed to make the connecting column 204 squeeze the contraction spring 205 to contract and move, and the connecting column 204 moves to squeeze the conical block 209, so that the conical block 209 pushes the support column 207 to squeeze the support spring 208 to contract and move, so that the support column 207 moves to drive the fixed block 206 to move out of the fixed plate 203, and the connection and fixation between the baffle plate 202 and the support plate 201 can be released, so that the baffle plate 202 and the support plate 201 can be separated from each other, so that it is convenient for the staff to replace the wire barrel on the wire-releasing rod 301;

[0035] Refer to the instruction manual Figure 1-6 The baffle plate 202 and the support plate 201 are connected and fixed to each other, so that the baffle plate 202 and the top of the wire-paying rod 301 are fitted together, and the telescopic column 302 is squeezed, so that the telescopic column 302 squeezes the telescopic spring 304 and contracts and moves, and the telescopic column 302 moves and squeezes the slider 305, so that the slider 305 drives the limit plate 306 to squeeze the limit spring 307 and contracts and moves, and the slider 305 moves to replace the clamping blade 308 to move, so that the clamping blade 308 extends out from the inside of the wire-paying rod 301 and fits with the wire barrel sleeved on the outer wall of the wire-paying rod 301, so that the clamping blade 308 completes the clamping and fixing of the wire barrel sleeved on the outer wall of the wire-paying rod 301. At the same time, the wire-paying rod 301 rotates on the support plate 201 through the rotating shaft 303 at the bottom end, so that when the wire-paying rod 301 rotates to drive the wire barrel to pay off the wire, the wire barrel will not rotate and jump on the outer wall of the wire-paying rod 301, causing the problem of different tightness of the sewing thread.

[0036] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A thread guide mechanism for a sewing machine, comprising a sewing machine body (1), characterized in that: A lead assembly (101) is fixedly mounted on the top of the sewing machine body (1); one end of the top of the sewing machine body (1) is connected and fixed to a limiting mechanism (2) located at one end of the lead assembly (101); a clamping mechanism (3) is rotatably connected inside the limiting mechanism (2); The limiting mechanism (2) comprises a support plate (201), the support plate (201) is fixedly mounted on one end of the sewing machine body (1), a baffle (202) is mounted on the top of the support plate (201), the bottom of the baffle (202) is connected and fixed with fixed plates (203) on both sides and penetrates into the interior of the support plate (201), connecting columns (204) are slidably connected to both sides of the support plate (201) and penetrate into the interior of the support plate (201), one side of the connecting column (204) is connected and fixed with a contraction spring (205) and is located inside the support plate (201), and the connecting column (204) is connected and fixed with a contraction spring (205) on one side and is located inside the support plate (201). Conical blocks (209) are installed at both ends of the connecting column (204) and are slidably connected to the inside of the support plate (201); one end of the conical block (209) away from the connecting column (204) is connected and fixed to the support column (207) and is located inside the support plate (201); one side of the top of the support column (207) is connected and fixed to the fixed block (206) and passes through the support plate (201) to the inside of the fixed plate (203); one side of the support column (207) away from the fixed block (206) and the conical block (209) is connected and fixed to the support spring (208) and is located inside the support plate (201); The clamping mechanism (3) comprises a wire-releasing rod (301), and there are a plurality of wire-releasing rods (301). The plurality of wire-releasing rods (301) are installed at the top end of the support plate (201) and are located at the bottom end of the baffle plate (202). The top end of the wire-releasing rod (301) is slidably connected to a telescopic column (302) and penetrates into the interior of the wire-releasing rod (301). The bottom end of the wire-releasing rod (301) is connected and fixed with a rotating shaft (303) and is rotatably connected to the interior of the support plate (201). The interior of the wire-releasing rod (301) is connected and fixed with a telescopic spring (304). , and is located at the bottom end of the telescopic column (302); a slider (305) is slidably connected inside the wire-paying rod (301) and is respectively located on both sides of the bottom end of the telescopic column (302); the top end of the slider (305) is connected and fixed to a limit plate (306) and is located inside the wire-paying rod (301); one side of the limit plate (306) is connected and fixed to a limit spring (307); a side of the slider (305) away from the telescopic column (302) is connected and fixed to a clamping blade (308) and passes through the wire-paying rod (301) to the outer wall of the wire-paying rod (301).

2. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: The top of the support plate (201) is provided with a connection groove matching the fixing plate (203), the two ends of the fixing plate (203) are provided with fixing grooves matching the fixing block (206), and the inside of the support plate (201) is provided with a support groove matching the connection column (204).

3. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: A chamfer with an inclined angle is provided on a side of the connecting column (204) close to the conical block (209), a circular arc surface matching the chamfer of the connecting column (204) is provided on a side of the conical block (209) in contact with the connecting column (204), and a supporting groove matching the supporting column (207) is provided inside the supporting plate (201).

4. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: The inside of the wire-releasing rod (301) is provided with a telescopic groove matching the telescopic column (302), the contact surface between the telescopic column (302) and the slider (305) is provided with an arc surface, the inside of the wire-releasing rod (301) is provided with a limit groove matching the limit plate (306), and the outer wall of the wire-releasing rod (301) is provided with a storage groove matching the clamping blade (308).

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