High-speed lockstitch sewing machine with auxiliary threading function

Abstract

The utility model provides a high-speed lockstitch sewing machine with an auxiliary threading function. Belongs to the field of lockstitch sewing machines. According to the technical key points, the sewing machine comprises a lockstitch sewing mechanism, the lockstitch sewing mechanism comprises a bottom plate, the top of the bottom plate is fixedly connected with a lockstitch sewing machine body, one side of the lockstitch sewing machine body is rotationally connected with an adjusting wheel, the two sides of the top of the bottom plate are fixedly connected with a bobbin rod and a thread guide rod respectively, and one side of the bottom of the bottom plate is slidably connected with a needle seat; the bottom of the needle seat is fixedly connected with a sewing needle, and one side of the bottom of the lockstitch sewing machine body is fixedly connected with a presser foot; the threading mechanism comprises a thread hole formed in the sewing needle, and a vertical plate is fixedly connected to the side, away from the adjusting wheel, of the lockstitch sewing machine body; the utility model aims to provide a high-speed lockstitch sewing machine with an auxiliary threading function. The suture threading device is used for threading a suture more conveniently.

Description

Technical Field

[0001] The utility model relates to the field of lockstitch sewing machines, in particular to a high-speed lockstitch sewing machine with an auxiliary threading function. Background Art

[0002] The flat sewing machine is also called a flat car, generally known as a single-needle flat sewing machine. The flat sewing machine mainly uses a sewing thread to form a seam on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. It is usually divided into two uses: thin materials and thick materials. The flat sewing machine can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, and products such as leather, plastic, and paper. Thin materials are generally used for knitting, underwear, shirts, uniforms, etc., and thick materials are generally used for various sportswear, jeans, fashion, coats, shoes and hats, leather, bags, etc. The flat sewing machine is the most basic type of sewing equipment.

[0003] The current high-speed lockstitch sewing machine with auxiliary threading function, as described in the patent with announcement number CN220977357U, includes a machine base, the top of the machine base is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to a plurality of sleeve rods, the upper sides of the sleeve rods are movably connected to sleeves, the front end of the machine base is fixedly connected to a mounting frame, the interior of the mounting frame is fixedly connected to a lockstitch needle, and a threading hole is provided on the lower side of the lockstitch needle, one end of the mounting frame is fixedly connected to a support plate via a rotating shaft, and the interior of the support plate is movably connected to a threading mechanism.

[0004] With regard to the above-mentioned related technologies, the inventor believes that the rotating rod can be driven to rotate by rotating the rotating rod, so that the sliding block on the outside of the rotating rod moves forward, so that the crochet hook is close to the flat sewing needle, and then the guide strip is pulled forward to make the crochet hook pass through the threading hole on the lower side of the flat sewing needle, so that the front end of the crochet hook hooks the needle and thread, and then under the action of the connecting spring, the crochet hook is quickly retreated to pull the needle and thread through the threading hole together, so as to perform fast threading. However, during the process of sewing the flat sewing needle to the fabric, the flat sewing needle will move back and forth up and down, and the staying height of the flat sewing needle will be different after each sewing. Therefore, in order to allow the crochet needle to pass through the threading hole smoothly during the threading process, the height of the threading hole of the flat sewing needle needs to be repeatedly adjusted so that the threading hole of the flat sewing needle and the crochet needle are at the same horizontal height, which makes the entire threading process more inconvenient. Utility Model Content

[0005] The purpose of the utility model is to provide a high-speed lockstitch sewing machine with auxiliary threading function to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-speed lockstitch sewing machine with auxiliary threading function, comprising

[0008] A flat sewing mechanism, the flat sewing mechanism comprising a bottom plate, the top of the bottom plate is fixedly connected to a flat sewing machine body, one side of the flat sewing machine body is rotatably connected to an adjusting wheel, two sides of the top of the bottom plate are respectively fixedly connected to a thread drum rod and a guide wire rod, one side of the bottom of the bottom plate is slidably connected to a needle seat, the bottom of the needle seat is fixedly connected to a sewing needle, and one side of the bottom of the flat sewing machine body is fixedly connected to a presser foot;

[0009] A threading mechanism, the threading mechanism includes a thread hole opened inside the sewing needle, a vertical plate is fixedly connected to the side of the sewing machine body away from the adjusting wheel, a sliding rod is slidably connected to the inside of the vertical plate, a thread hook matched with the thread hole is fixedly connected to the side of the sliding rod close to the sewing needle, a limiting groove is opened on one side of the needle seat, a U-shaped block is fixedly connected to the bottom side of the base plate, a limiting strip is slidably connected to the inside of the U-shaped block, and the limiting strip is matched with the limiting groove.

[0010] As a further solution of the utility model: the outer side of the wire drum rod is rotatably connected to a bracket, the top of the wire drum rod is provided with a groove, the inside of the groove is provided with a rotating shaft fixedly connected to the wire drum rod, the outer side of the rotating shaft is rotatably connected to a limit rotating rod, and a torsion spring is fixedly connected between the limit rotating rod and the inner wall of the groove.

[0011] As a further solution of the utility model: a reinforcing rib plate is fixedly connected to one side of the vertical plate, and the reinforcing rib plate is fixedly connected to the flat sewing machine body.

[0012] As a further solution of the utility model: the bottom of the U-shaped block slides through a limit pin, the bottom of the limit pin is fixedly connected with a pull cap, a second spring is fixedly connected between the pull cap and the U-shaped block, and a limit hole matching the limit pin is opened inside the limit strip.

[0013] As a further solution of the utility model: a first spring is sleeved on the outer side of the vertical plate, and two ends of the first spring are fixedly connected to the vertical plate and the sliding rod respectively.

[0014] As a further solution of the utility model: a sliding bar is fixedly connected to the inner wall of the vertical plate, and a sliding groove matched with the sliding bar is provided at the bottom of the sliding rod.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] After the utility model adopts the above structure, through the mutual cooperation of the limiting groove, the U-shaped block, the limiting strip and the thread hook, when threading, the limiting strip can be slid into the interior of the limiting groove, and then the adjusting wheel can be rotated to make the needle seat move upward until the bottom of the limiting groove contacts the bottom of the limiting strip. At this time, the thread hole moves with the sewing needle and the needle seat to be relative to the thread hook, so as to facilitate the subsequent passage of the thread hook through the thread hole to hook and pull the suture, making the threading of the suture more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0018] Figure 1 The figure is a schematic diagram of the overall structure of a high-speed lockstitch sewing machine with auxiliary threading function.

[0019] Figure 2 It is a high-speed lockstitch sewing machine with auxiliary threading function. Figure 1 Schematic diagram of the A part structure.

[0020] Figure 3 It is a high-speed lockstitch sewing machine with auxiliary threading function. Figure 1 Schematic diagram of the structure of part B.

[0021] Figure 4 This is a structural schematic diagram from another perspective of a high-speed lockstitch sewing machine with auxiliary threading function.

[0022] Figure 5 It is a high-speed lockstitch sewing machine with auxiliary threading function. Figure 4 Schematic diagram of the C part structure.

[0023] In the figure: 1. flat sewing mechanism; 101. bottom plate; 102. flat sewing machine body; 103. adjusting wheel; 104. bobbin rod; 105. guide rod; 106. presser foot; 107. needle seat; 108. sewing needle; 109. bracket; 110. groove; 111. rotating shaft; 112. limit rotating rod; 113. torsion spring; 2. threading mechanism; 201. vertical plate; 202. reinforcing rib plate; 203. sliding rod; 204. thread hook; 205. thread hole; 206. slide groove; 207. sliding bar; 208. first spring; 209. U-shaped block; 210. limit strip; 211. limit groove; 212. limit pin; 213. second spring; 214. limit hole; 215. pull cap. DETAILED DESCRIPTION

[0024] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0025] See also Figure 1-5A high-speed flat-bed sewing machine with an auxiliary threading function comprises a flat-bed sewing mechanism 1, which comprises a bottom plate 101, a flat-bed sewing machine body 102 is fixedly connected to the top of the bottom plate 101, and the bottom plate 101 is used to provide support for the flat-bed sewing machine body 102. An adjusting wheel 103 is rotatably connected to one side of the flat-bed sewing machine body 102, and a bobbin rod 104 and a guide rod 105 are fixedly connected to the top two sides of the bottom plate 101, respectively. The bobbin rod 104 can limit the bobbin, and the guide rod 105 can guide the sewing thread. A bracket 109 is rotatably connected to the outer side of the bobbin rod 104, and the bracket 109 can support the bobbin.

[0026] A groove 110 is provided at the top of the thread spool rod 104. A rotating shaft 111 fixedly connected to the thread spool rod 104 is provided inside the groove 110. A limit rotating rod 112 is rotatably connected to the outer side of the rotating shaft 111. When the limit rotating rod 112 is rotated to a horizontal position, it can limit the thread spool inserted outside the thread spool rod 104, so as to reduce the probability of the thread spool escaping from the outer side of the thread spool rod 104. A torsion spring 113 is fixedly connected between the limit rotating rod 112 and the inner wall of the groove 110. The setting of the torsion spring 113 can use its own elasticity to pull the limit rotating rod 112 to maintain a horizontal state, thereby reducing the probability of the limit rotating rod 112 rotating. A needle seat 107 is slidably connected to one side of the bottom of the bottom plate 101. A sewing needle 108 is fixedly connected to the bottom of the needle seat 107. The setting of the sewing needle 108 can pierce the fabric when it moves downward. The threading mechanism 2 includes a thread hole 205 opened inside the sewing needle 108. The thread hole 205 is provided for threading the sewing thread, so that when the sewing needle 108 pierces the fabric, the sewing thread can be driven to pass through the fabric, thereby sewing the fabric to fix it.

[0027] A presser foot 106 is fixedly connected to one side of the bottom of the sewing machine body 102. The setting of the presser foot 106 can press the fabric tightly during the sewing process. A vertical plate 201 is fixedly connected to one side of the sewing machine body 102 away from the adjusting wheel 103. A reinforcing rib plate 202 is fixedly connected to one side of the vertical plate 201. The reinforcing rib plate 202 is fixedly connected to the sewing machine body 102. The setting of the reinforcing rib plate 202 can further connect and fix the sewing machine body 102 and the vertical plate 201, thereby improving the connection stability between the vertical plate 201 and the sewing machine body 102. A sliding rod 203 is slidably connected inside the vertical plate 201. The setting of the vertical plate 201 can guide the sliding of the sliding rod 203. A sliding bar 207 is fixedly connected to the inner wall of the vertical plate 201, and a sliding groove 206 adapted to the sliding bar 207 is provided at the bottom of the sliding rod 203. The setting of the sliding groove 206 and the sliding bar 207 can guide the sliding of the sliding rod 203 and reduce the probability of the wire hook 204 rotating.

[0028] The outer side of the vertical plate 201 is sleeved with a first spring 208, and the two ends of the first spring 208 are fixedly connected to the vertical plate 201 and the sliding rod 203 respectively. The first spring 208 can use its own elasticity to pull the sliding rod 203 and the thread hook 204 to reset. In the process of sewing the fabric, the probability of the thread hook 204 touching the sewing needle 108 is reduced. The side of the sliding rod 203 close to the sewing needle 108 is fixedly connected with the thread hook 204 adapted to the thread hole 205. The setting of the thread hook 204 can be used to hang the suture that needs to pass through the thread hole 205 on the thread hook 204 after passing through the thread hole 205, and then the suture to be passed through the thread hole 205 can be passed by moving the thread hook 204 away from the side of the sewing needle 108.

[0029] A limiting groove 211 is provided on one side of the needle seat 107, and a U-shaped block 209 is fixedly connected to one side of the bottom of the base plate 101. The U-shaped block 209 is internally slidably connected to a limiting strip 210, and the limiting strip 210 is adapted to the limiting groove 211. After the U-shaped block 209 slides into the limiting groove 211, the needle seat 107 can be driven to move upward by rotating the adjusting wheel 103. When the bottom of the limiting groove 211 contacts the bottom of the limiting strip 210, the thread hole 205 moves to a position relative to the thread hook 204. Therefore, when threading the suture, there is no need to repeatedly rotate the adjusting wheel 103 to drive the needle seat 107 and the suture needle 108 to move up and down, and adjust the thread hook 204 to be aligned with the thread hole 205, so that the threading of the suture is more convenient and quick. The bottom of the U-shaped block 209 slides through the limit pin 212, and the bottom of the limit pin 212 is fixedly connected with a pull cap 215, and a second spring 213 is fixedly connected between the pull cap 215 and the U-shaped block 209. A limit hole 214 adapted to the limit pin 212 is provided inside the limit strip 210. The limit pin 212 is arranged to limit the limit strip 210 after being inserted into the limit hole 214, so as to reduce the probability that the limit strip 210 moves to the inside of the limit groove 211 during the sewing process of the fabric, thereby affecting the up and down movement of the needle seat 107.

[0030] In this embodiment, the flat-bed sewing machine body 102 is of prior art, and the specific transmission method of the existing flat-bed sewing machine to drive the needle seat 107 and the sewing needle 108 to move up and down by rotating the adjusting wheel 103 is of prior art and will not be described in detail here.

[0031] When in use, the limit rotating rod 112 is rotated to a vertical state, thereby driving the torsion spring 113 to deform, and then the thread spool is passed through the limit rotating rod 112 and inserted into the outside of the thread spool rod 104, and then the limit rotating rod 112 is loosened, so that the torsion spring 113 recovers its deformation, thereby driving the limit rotating rod 112 to rotate to a horizontal state, thereby limiting the thread spool to reduce the probability of the thread spool escaping from the outside of the thread spool rod 104, and then a part of the suture wound on the thread spool is pulled out and bypassed the outside of the guide rod 105, and then the adjusting wheel 103 is rotated, and then the limit strip 210 is slid to one side of the needle seat 107 until the limit strip 210 slides to the inside of the limit groove 211, and then the adjusting wheel 103 is rotated so that the adjusting wheel 103 drives the needle seat 107 to The thread hook 204 is moved upward until the bottom of the limiting groove 211 contacts the bottom of the limiting strip 210. At this time, the position of the thread hook 204 corresponds to the position of the thread hole 205. Then, the sliding rod 203 is pushed on one side of the sewing needle 108. At this time, the first spring 208 is compressed, so that the sliding rod 203 drives the thread hook 204 to move toward the side of the sewing needle 108 until the thread hook 204 passes through the thread hole 205. Then, the suture is hooked inside the thread hook 204. Then, the sliding rod 203 is released, so that the first spring 208 recovers its deformation, thereby driving the sliding rod 203 and the thread hook 204 to move to the side away from the sewing needle 108. At this time, the thread hook 204 hooks the suture out and passes through the inside of the thread hole 205, thereby completing the threading of the suture, making the threading of the suture more convenient.

[0032] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A high-speed lockstitch sewing machine with auxiliary threading function, characterized in that: include A flat sewing mechanism (1), the flat sewing mechanism (1) comprising a bottom plate (101), the top of the bottom plate (101) being fixedly connected to a flat sewing machine body (102), one side of the flat sewing machine body (102) being rotatably connected to an adjusting wheel (103), two sides of the top of the bottom plate (101) being respectively fixedly connected to a thread spool rod (104) and a guide rod (105), one side of the bottom of the bottom plate (101) being slidably connected to a needle seat (107), the bottom of the needle seat (107) being fixedly connected to a sewing needle (108), and one side of the bottom of the flat sewing machine body (102) being fixedly connected to a presser foot (106); A threading mechanism (2), the threading mechanism (2) comprising a thread hole (205) arranged inside the sewing needle (108); a side of the sewing machine body (102) away from the adjusting wheel (103) is fixedly connected to a vertical plate (201); a sliding rod (203) is slidably connected inside the vertical plate (201); a side of the sliding rod (203) close to the sewing needle (108) is fixedly connected to a thread hook (204) matched with the thread hole (205); a limiting groove (211) is arranged on one side of the needle seat (107); a U-shaped block (209) is fixedly connected to one side of the bottom of the bottom plate (101); a limiting strip (210) is slidably connected inside the U-shaped block (209); the limiting strip (210) is matched with the limiting groove (211).

2. A high-speed lockstitch sewing machine with auxiliary threading function according to claim 1, characterized in that: The outer side of the thread spool rod (104) is rotatably connected to a bracket (109); a groove (110) is provided on the top of the thread spool rod (104); a rotating shaft (111) fixedly connected to the thread spool rod (104) is provided inside the groove (110); a limit rotating rod (112) is rotatably connected to the outer side of the rotating shaft (111); a torsion spring (113) is fixedly connected between the limit rotating rod (112) and the inner wall of the groove (110).

3. A high-speed lockstitch sewing machine with auxiliary threading function according to claim 1, characterized in that: A reinforcing rib plate (202) is fixedly connected to one side of the vertical plate (201), and the reinforcing rib plate (202) is fixedly connected to the sewing machine body (102).

4. A high-speed lockstitch sewing machine with auxiliary threading function according to claim 1, characterized in that: The bottom of the U-shaped block (209) slides through the limit pin (212), the bottom of the limit pin (212) is fixedly connected with a pull cap (215), a second spring (213) is fixedly connected between the pull cap (215) and the U-shaped block (209), and a limit hole (214) adapted to the limit pin (212) is provided inside the limit strip (210).

5. The high-speed lockstitch sewing machine with auxiliary threading function according to claim 1, characterized in that: A first spring (208) is sleeved on the outer side of the vertical plate (201), and two ends of the first spring (208) are respectively fixedly connected to the vertical plate (201) and the sliding rod (203).

6. A high-speed lockstitch sewing machine with auxiliary threading function according to claim 1, characterized in that: The inner wall of the vertical plate (201) is fixedly connected with a sliding bar (207), and the bottom of the sliding rod (203) is provided with a sliding groove (206) adapted to the sliding bar (207).

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