A stitch length adjusting device for a sewing machine for producing a molded underwear

Abstract

The utility model relates to the technical field of production shaping underwear, and disclose a sewing machine needle distance adjusting device of production shaping underwear, including spindle, one end of spindle is connected with runner, the below of spindle is provided with cloth feed shaft, lower shaft and swing axle, the output of spindle and lower shaft and swing axle drive connection, the outer surface of cloth feed shaft is equipped with the adjusting shaft, the one end of adjusting shaft is articulated with the tooth holder, and the top of tooth holder is with the crank structure transmission connection of spindle outer surface, through setting the clamping groove in the nameplate both sides, the surface with the surface of clamping seat are all matching arc, can after adjusting by connecting rod, the surface of clamping seat is inserted in the nameplate, the clamping tooth of clamping seat inner wall both sides is embedded in the clamping groove of nameplate both sides, and the stability of adjusting connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of shaping underwear production technology, specifically a sewing machine stitch length adjustment device for producing shaping underwear. Background Technology

[0002] Shapewear is functional underwear that uses physical pressure to adjust body shape, providing both immediate shaping and long-term posture correction. During production, some edge finishing is done using a sewing machine. In the sewing machine's structure, the feed mechanism's main function is to continuously lift and pull the fabric on the needle plate through the reciprocating elliptical motion of the feed dog, thus continuously transporting the fabric to the machine head, where the needle forms the stitches. The distance between the stitch loops varies depending on the sewing requirements, i.e., the stitch length. Since the machine head's operating frequency remains constant, the stitch length is generally adjusted by changing the forward and backward movement of the feed dog to accommodate different sewing needs.

[0003] For example, Chinese patent CN220183552U discloses a sewing machine stitch length adjustment device, including a frame and a guide structure. The frame includes a base frame and an upper frame. A needle is mounted on the upper frame, and a driving component is installed inside the base frame. The driving component is used to move the upper frame closer to or away from the base frame, and the guide structure is used to guide the upper frame when it is moved up and down by the driving component. The driving component is an electric telescopic rod, and the output end of the electric telescopic rod is connected to the bottom end of the upper frame by bolts. When adjusting the distance between the needle and the sewing cloth, this invention only requires activating the electric telescopic rod in the mounting slot to drive the upper frame to move up and down. The adjustment of the distance between the upper frame and the base frame is quick and convenient, without manual adjustment and without the need for excessive structures, thus reducing production difficulty. In addition, when the upper frame moves, the guide rod can move linearly along the guide groove, which can effectively improve the stability of the upper frame's up and down movement. Traditional needle spacing adjustment devices are fixed by pressing the knob inward after adjustment, but the movement trajectory of the lever adjustment process is arc-shaped, so the contact area between the knob and the label is small after adjustment, which can easily lead to loosening. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a stitch length adjustment device for sewing machines used in the production of shaping underwear, which offers advantages such as increased stability after stitch length adjustment and solves the problem of traditional knobs easily becoming loose.

[0005] (II) Technical Solution To achieve the above-mentioned purpose of increasing the adjustable stitch length, this utility model provides the following technical solution: a stitch length adjustment device for a sewing machine for producing shaping underwear, including a main shaft, one end of which is connected to a rotating wheel, a feed shaft, a lower shaft and a swing shaft are arranged below the main shaft, the output end of the main shaft is connected to the lower shaft and the swing shaft in a transmission connection, an adjustment shaft is sleeved on the outer surface of the feed shaft, one end of the adjustment shaft is hinged to a toothed bracket, and the top end of the toothed bracket is connected to a crank structure on the outer surface of the main shaft in a transmission connection; A sign is fixedly installed on the surface of the sewing machine housing. An adjustment groove is provided on the outer surface of the sign, and a connecting rod is inserted into the adjustment groove. A limit component is fixedly installed on the outer surface of one end of the connecting rod, and the limit component fixes the adjusted connecting rod.

[0006] Preferably, a limit frame is provided on one side of the guide frame, and one side of the guide frame is rotatably connected to the limit frame. A guide shaft is fixedly installed on one side of the dental frame, and one end of the guide shaft is inserted into a groove on the outer surface of the other side of the guide frame. The guide frame is rotated by a connecting rod, thereby driving the dental frame to adjust up and down through the guide shaft on one side. During the adjustment process, the bottom of the dental frame will pull the adjustment shaft to rotate along the feeding shaft.

[0007] Preferably, the limiting component includes a retainer fixedly installed at one end of the connecting rod, and the retainer is sleeved on the outer surface of the sign. The outer surface of the sign is arc-shaped. During the adjustment process, the retainer is first separated from the sign by the lever, thereby releasing the limiting effect on the connecting rod.

[0008] Preferably, a grip button is fixedly installed on the outer surface of the card holder, and locking teeth are fixedly installed on both sides of the inner wall of the card holder. The outer surfaces of both sides of the sign are provided with slots that mesh and match with the locking teeth, so that the locking teeth on the inner wall of the card holder are embedded into the slots on both sides of the sign for limiting and locking.

[0009] Preferably, the other end of the connecting rod is inserted into one end of the guide frame, and a stop block is fixedly installed on the other end of the connecting rod. A return spring is sleeved on the outer surface of the other end of the connecting rod on one side of the stop block. When the connecting rod is pulled outward, the stop block at one end will squeeze the return spring. After adjustment, the knob is released, and the return spring pulls the card seat inward to reset through the connecting rod.

[0010] (III) Beneficial Effects Compared with the prior art, this utility model provides a sewing machine stitch length adjustment device for producing shaping underwear, which has the following beneficial effects: By setting slots on both sides of the sign, and ensuring that the surface of the sign and the surface of the card holder are both curved, the card holder can be inserted into the surface of the sign after adjustment by the connecting rod. The teeth on both sides of the inner wall of the card holder are embedded in the slots on both sides of the sign for limiting and adjusting the stability of the connecting rod. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 The explosion of the dental bracket adjustment structure of this utility model Figure 1 ; Figure 3 The explosion of the dental bracket adjustment structure of this utility model Figure 2 ; Figure 4 This is a schematic diagram of the connecting rod structure of this utility model.

[0012] In the diagram: 1. Main shaft; 11. Rotary wheel; 2. Feed shaft; 3. Lower shaft; 4. Swing shaft; 5. Tooth bracket; 51. Adjustment shaft; 52. Guide frame; 53. Limiting frame; 54. Guide shaft; 6. Nameplate; 61. Connecting rod; 62. Handle; 63. Card holder; 64. Card slot; 65. Stop block; 66. Return spring. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-4 The present invention provides the following technical solution: a sewing machine stitch length adjustment device for producing shaping underwear, comprising a main shaft 1, one end of which is connected to a rotating wheel 11, a feed shaft 2, a lower shaft 3 and a swing shaft 4 are arranged below the main shaft 1, the output end of the main shaft 1 is connected to the lower shaft 3 and the swing shaft 4 in a transmission connection, an adjustment shaft 51 is sleeved on the outer surface of the feed shaft 2, one end of the adjustment shaft 51 is hinged to a toothed bracket 5, and the top end of the toothed bracket 5 is connected to a crank structure on the outer surface of the main shaft 1 in a transmission connection; In this embodiment, a limit frame 53 is provided on one side of the guide frame 52, and the guide frame 52 is rotatably connected to the limit frame 53. A guide shaft 54 ​​is fixedly installed on one side of the dental frame 5, and one end of the guide shaft 54 ​​is inserted into a groove on the outer surface of the other side of the guide frame 52. The guide frame 52 is rotated by the connecting rod 61, thereby driving the dental frame 5 to adjust up and down through the guide shaft 54 ​​on one side. During the adjustment process, the bottom of the dental frame 5 will pull the adjustment shaft 51 to rotate along the feeding shaft 2. In this embodiment, the label 6 is fixedly installed on the surface of the sewing machine housing. An adjustment groove is provided on the outer surface of the label 6, and a connecting rod 61 is inserted into the adjustment groove. A limit component is fixedly installed on the outer surface of one end of the connecting rod 61, and the adjusted connecting rod 61 is fixed by the limit component.

[0015] The limiting component includes a retainer 63 fixedly installed at one end of the connecting rod 61, and the retainer 63 is sleeved on the outer surface of the sign 6. The outer surface of the sign 6 is arc-shaped. During the adjustment process, the retainer 63 is first separated from the sign 6 by the lever 62, thereby releasing the limiting effect on the connecting rod 61.

[0016] In this embodiment, it should also be noted that a grip button 62 is fixedly installed on the outer surface of the card holder 63, and card teeth are fixedly installed on both sides of the inner wall of the card holder 63. The outer surfaces of both sides of the nameplate 6 are provided with card grooves 64 that mesh and match with the card teeth, so that the card teeth on the inner wall of the card holder 63 are embedded into the card grooves 64 on both sides of the nameplate 6 for limiting and locking.

[0017] The other end of the connecting rod 61 is inserted into one end of the guide frame 52. A stop block 65 is fixedly installed on the other end of the connecting rod 61. A return spring 66 is sleeved on the outer surface of the other end of the connecting rod 61 on one side of the stop block 65. When the connecting rod 61 is pulled outward, the stop block 65 at one end will squeeze the return spring 66. After the adjustment is completed, the knob 62 is released, and the return spring 66 pulls the card seat 63 inward to reset through the connecting rod 61.

[0018] The working principle of this embodiment is as follows: The core principle of sewing machine stitch length adjustment is to control the fabric movement distance by changing the rotation amplitude of the feed shaft 2, thereby adjusting the stitch length. When adjusting, it is necessary to change the rotation amplitude of the feed shaft 2 by adjusting the height of the feed dog 5. During adjustment, the lever 62 first separates the card holder 63 from the label 6, releasing the limit on the connecting rod 61. Then, the connecting rod 61 slides up and down along the label 6, causing the guide frame 52 to rotate. This, in turn, causes the toothed bracket 5 to adjust up and down via the guide shaft 54 ​​on one side. During adjustment, the bottom of the toothed bracket 5 pulls the adjusting shaft 51 to rotate along the feeding shaft 2. As the connecting rod 61 pulls outward, the stop block 65 at one end presses against the return spring 66. After adjustment, the lever 62 is released, and the return spring 66 pulls the card holder 63 inward through the connecting rod 61 to reset it, so that the teeth on the inner wall of the card holder 63 are inserted into the slots 64 on both sides of the label 6 for limiting and locking.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sewing machine stitch length adjustment device for producing shaping underwear, characterized in that, include: A main shaft (1) is connected to a rotating wheel (11) at one end. A feeding shaft (2), a lower shaft (3) and a swing shaft (4) are provided below the main shaft (1). The output end of the main shaft (1) is connected to the lower shaft (3) and the swing shaft (4) in a transmission connection. An adjusting shaft (51) is sleeved on the outer surface of the feeding shaft (2). A toothed bracket (5) is hinged to one end of the adjusting shaft (51), and the top end of the toothed bracket (5) is connected to the crank structure on the outer surface of the main shaft (1) in a transmission connection. The sign (6) is fixedly installed on the surface of the sewing machine housing. An adjustment groove is provided on the outer surface of the sign (6). A connecting rod (61) is inserted into the adjustment groove. A limit component is fixedly installed on the outer surface of one end of the connecting rod (61). The adjusted connecting rod (61) is fixed by the limit component.

2. The stitch length adjustment device for a sewing machine used in producing shaping underwear according to claim 1, characterized in that: A limit frame (53) is provided on one side of the guide frame (52), and one side of the guide frame (52) is rotatably connected to the limit frame (53).

3. The sewing machine stitch length adjustment device for producing shaping underwear according to claim 2, characterized in that: A guide shaft (54) is fixedly installed on one side of the dental frame (5), and one end of the guide shaft (54) is inserted into a groove on the outer surface of the other side of the guide frame (52).

4. The stitch length adjustment device for a sewing machine used in producing shaping underwear according to claim 1, characterized in that: The limiting component includes a card holder (63) fixedly installed at one end of the connecting rod (61), and the card holder (63) is sleeved on the outer surface of the sign (6), the outer surface of the sign (6) being arc-shaped.

5. The stitch length adjustment device for a sewing machine used in producing shaping underwear according to claim 4, characterized in that: A grip button (62) is fixedly installed on the outer surface of the card holder (63), and card teeth are fixedly installed on both sides of the inner wall of the card holder (63). The outer surfaces of both sides of the nameplate (6) are provided with card grooves (64) that mesh with and match the card teeth.

6. The stitch length adjustment device for a sewing machine used in producing shaping underwear according to claim 4, characterized in that: The other end of the connecting rod (61) is inserted into one end of the guide frame (52), and a stop block (65) is fixedly installed on the other end of the connecting rod (61). A return spring (66) is sleeved on the outer surface of the other end of the connecting rod (61) on one side of the stop block (65).

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