Stitch length adjusting mechanism of sewing machine

Abstract

The utility model discloses a stitch length adjusting mechanism of a sewing machine, which relates to the technical field of sewing machines, and comprises a needle rod, the lower end of the needle rod is fixedly connected with a mounting block, the upper surface of the mounting block is provided with a plurality of mounting holes, two of the mounting holes are internally inserted with fixing blocks, and the fixing blocks are fixedly connected with the needle rod. The lower ends of the two fixing blocks are fixedly connected with machine needles, a plurality of inserting holes are transversely formed in the mounting block, an inserting rod is jointly inserted into each inserting hole and penetrates through each mounting hole, fixing holes are formed in the two sides of the two fixing blocks, and the two fixing holes are matched with the inserting rods. A cavity is formed in the inserting rod, and a fixing mechanism is arranged in the cavity. The two fixing blocks are inserted into different mounting holes, the distance between the two fixing blocks can be adjusted, namely the stitch length of two machine needles is adjusted, and then the two fixing blocks can be fixed by inserting the inserting rod.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a needle distance adjusting mechanism of a sewing machine. 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, and the double-needle sewing machine is one of them.

[0003] Among them, a double-needle sewing machine with a needle distance adjustment mechanism with publication number CN215593385U includes a sewing machine body, a clamping rod, a needle bar, and a presser foot are installed under the head of the sewing machine body, the needle bar is equipped with a mounting seat, the mounting seat is provided with a mounting groove, the mounting groove is provided with a connecting part and a mounting frame, the mounting frame is provided with two sliders through a sliding rod, the two sliders are fixed with machine needles, a screw rod is provided between the sliding rods, an adjustment knob is fixed at one end of the screw rod, a first thread is provided at the other end of the screw rod and a fixing nut is installed, the outer wall of the screw rod in the mounting frame is mirrored with a second thread, and the screw is threadably connected to the two sliders through the second thread.

[0004] However, in the above technical solution, when the sewing machine is working, the adjusting knob will rotate due to vibration, and then drive the screw to rotate, so the gap between the two needles will change, making the sewn clothes not beautiful enough. Utility Model Content

[0005] In view of the above problems existing in the existing double-needle sewing machine with a needle distance adjustment mechanism, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a needle distance adjustment mechanism for a sewing machine, which solves the problem that the adjustment knob will rotate due to vibration when the sewing machine is working, and then drive the screw to rotate, so the gap between the two needles will change, making the sewn clothes not beautiful enough.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A needle distance adjustment mechanism for a sewing machine comprises a needle bar, wherein the lower end of the needle bar is fixedly connected to a mounting block, the upper surface of the mounting block is provided with a plurality of mounting holes, wherein two of the mounting holes are internally plugged with fixing blocks, the lower ends of the two fixing blocks are both fixedly connected to a machine needle, a plurality of plug holes are horizontally provided inside the mounting block, an insertion rod is commonly plugged inside each of the plug holes, the insertion rods pass through the interior of each mounting hole, fixing holes are provided on both sides of the two fixing blocks, the two fixing holes are matched with the insertion rods, a cavity is provided inside the insertion rod, a fixing mechanism is provided inside the cavity, and the insertion rod is fixed to the interior of the corresponding plug hole through the fixing mechanism.

[0009] Preferably, the fixing mechanism includes a first trapezoidal block, two second trapezoidal blocks, two T-shaped blocks, a screw and a knob, an internal threaded hole is provided on one side of the cavity, the screw is threadedly arranged inside the internal threaded hole, one side of the first trapezoidal block is rotatably connected to one end of the screw, square holes are provided on both sides of the cavity, the two second trapezoidal blocks are respectively slidably arranged inside the corresponding square holes, the inclined surfaces of the two second trapezoidal blocks are provided with T-shaped slots, the two T-shaped blocks are respectively slidably arranged inside the corresponding T-shaped slots, the two T-shaped blocks are respectively fixedly connected to the two inclined surfaces of the first trapezoidal block, and the knob is fixedly connected to one end of the screw.

[0010] Preferably, a fixing groove is symmetrically provided on the inner side of one of the jacks, and the two fixing grooves are matched with the corresponding second trapezoidal blocks respectively.

[0011] Preferably, two telescopic rods are fixedly connected between the first trapezoidal block and the inner wall of the cavity.

[0012] Preferably, each of the fixing blocks is square.

[0013] Preferably, each of the fixing blocks and one end of the insertion rod is fixedly connected with a stopper.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model can adjust the distance between the two fixing blocks by inserting the two fixing blocks into different mounting holes, that is, adjust the needle distance of the two machine needles, and then insert the insertion rod to fix the two fixing blocks.

[0016] 2. The utility model rotates the knob to rotate the screw rod, which drives the first trapezoidal block to squeeze the two second trapezoidal blocks. The two second trapezoidal blocks are then moved to the inside of the corresponding fixing grooves, so that the insertion rod can be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 A cross-sectional view of

[0020] Figure 3For the utility model Figure 2 A magnified schematic diagram of part A;

[0021] Figure 4 It is a schematic structural diagram of the connection between the first trapezoidal block and the second trapezoidal block of the utility model.

[0022] Description of reference numerals:

[0023] 1. Needle bar; 2. Mounting block; 3. Fixing block; 4. Needle; 5. Insertion rod; 6. First trapezoidal block; 7. Second trapezoidal block; 8. T-shaped block; 9. Screw rod; 10. Knob; 11. Telescopic rod; 12. Stop block. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model embodiment discloses a needle distance adjustment mechanism of a sewing machine.

[0026] The utility model provides Figure 1-4 The needle distance adjustment mechanism of a sewing machine shown in the figure includes a needle bar 1, and the lower end of the needle bar 1 is fixedly connected to a mounting block 2, and a plurality of mounting holes are provided on the upper surface of the mounting block 2, wherein two mounting holes are internally inserted with fixing blocks 3, and the lower ends of the two fixing blocks 3 are fixedly connected with a machine needle 4, and a plurality of plug holes are horizontally provided inside the mounting block 2, and an insertion rod 5 is commonly inserted inside each plug hole, and the insertion rod 5 passes through the inside of each mounting hole, and fixing holes are provided on both sides of the two fixing blocks 3, and the two fixing holes are matched with the insertion rod 5, and a cavity is provided inside the insertion rod 5, and a fixing mechanism is provided inside the cavity, and the insertion rod 5 is fixed to the inside of the corresponding plug hole through the fixing mechanism.

[0027] By inserting the two fixing blocks 3 into different mounting holes, the distance between the two fixing blocks 3 can be adjusted, that is, the needle distance of the two needles 4 can be adjusted. Then, the two fixing blocks 3 can be fixed by inserting the insertion rod 5. At the same time, this method can prevent the needle 4 from moving due to vibration when the sewing machine is working.

[0028] In order to fix the plunger 5, Figure 2-4As shown, the fixing mechanism includes a first trapezoidal block 6, two second trapezoidal blocks 7, two T-shaped blocks 8, a screw rod 9 and a knob 10. An internal threaded hole is provided on one side of the cavity. The screw rod 9 is threadedly arranged inside the internal threaded hole. One side of the first trapezoidal block 6 is rotatably connected to one end of the screw rod 9. Square holes are provided on both sides of the cavity. The two second trapezoidal blocks 7 are respectively slidably arranged inside the corresponding square holes. The inclined surfaces of the two second trapezoidal blocks 7 are provided with T-shaped grooves. The two T-shaped blocks 8 are respectively slidably arranged inside the corresponding T-shaped grooves. The two T-shaped blocks 8 are respectively fixedly connected to the two inclined surfaces of the first trapezoidal block 6. The knob 10 is fixedly connected to one end of the screw rod 9. The inner side of one of the jacks is symmetrically provided with fixing grooves, and the two fixing grooves are matched with the corresponding second trapezoidal blocks 7 respectively.

[0029] The knob 10 is rotated, and then the screw rod 9 is rotated, and then the first trapezoidal block 6 is driven to squeeze the two second trapezoidal blocks 7, and then the two second trapezoidal blocks 7 are respectively moved to the inside of the corresponding fixing grooves, so that the insertion rod 5 can be fixed.

[0030] In order to limit the first trapezoidal block 6, Figure 2-3 As shown, two telescopic rods 11 are fixedly connected between the first trapezoidal block 6 and the inner wall of the cavity.

[0031] The position of the first trapezoidal block 6 can be limited by the two telescopic rods 11, thereby preventing the two T-shaped blocks 8 from moving out of the corresponding T-shaped slots.

[0032] In order to facilitate the insertion of the plunger 5, Figure 2 As shown, each fixing block 3 is square.

[0033] When the square fixing block 3 is inserted into the mounting hole, the fixing hole and each slot can be in the same direction, thereby facilitating the insertion of the insertion rod 5 .

[0034] Finally, in order to prevent the fixing block 3 and the insertion rod 5 from being excessively inserted, as Figure 1-2 As shown, each fixing block 3 and one end of the insertion rod 5 are fixedly connected with a stopper 12 .

[0035] Each stopper 12 can prevent the insertion rod 5 and each fixing block 3 from being excessively inserted, and can also play a certain positioning role.

[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 needle length adjustment mechanism for a sewing machine, comprising a needle bar (1), characterized in that: The lower end of the needle rod (1) is fixedly connected to a mounting block (2), and a plurality of mounting holes are provided on the upper surface of the mounting block (2), wherein two of the mounting holes are internally plugged with fixing blocks (3), and the lower ends of the two fixing blocks (3) are fixedly connected to an organic needle (4), and a plurality of plug holes are transversely provided inside the mounting block (2), and an insertion rod (5) is commonly plugged inside each of the plug holes, and the insertion rod (5) passes through the inside of each mounting hole, and fixing holes are provided on both sides of the two fixing blocks (3), and the two fixing holes are matched with the insertion rod (5), and a cavity is provided inside the insertion rod (5), and a fixing mechanism is provided inside the cavity, and the insertion rod (5) is fixed to the inside of the corresponding plug hole through the fixing mechanism.

2. The needle distance adjustment mechanism of a sewing machine according to claim 1, characterized in that: The fixing mechanism comprises a first trapezoidal block (6), two second trapezoidal blocks (7), two T-shaped blocks (8), a screw rod (9) and a knob (10); an internal threaded hole is provided on one side of the cavity; the screw rod (9) is threadedly arranged inside the internal threaded hole; one side of the first trapezoidal block (6) is rotatably connected to one end of the screw rod (9); square holes are provided on both sides of the cavity; the two second trapezoidal blocks (7) are respectively slidably arranged inside the corresponding square holes; the inclined surfaces of the two second trapezoidal blocks (7) are respectively provided with T-shaped grooves; the two T-shaped blocks (8) are respectively slidably arranged inside the corresponding T-shaped grooves; the two T-shaped blocks (8) are respectively fixedly connected to the two inclined surfaces of the first trapezoidal block (6); and the knob (10) is fixedly connected to one end of the screw rod (9).

3. The needle distance adjustment mechanism of a sewing machine according to claim 1, characterized in that: A fixing groove is symmetrically provided on the inner side of one of the insertion holes, and the two fixing grooves are matched with corresponding second trapezoidal blocks (7) respectively.

4. The needle distance adjustment mechanism of a sewing machine according to claim 2, characterized in that: Two telescopic rods (11) are fixedly connected between the first trapezoidal block (6) and the inner wall of the cavity.

5. The needle distance adjustment mechanism of a sewing machine according to claim 1, characterized in that: Each of the fixing blocks (3) is square.

6. The needle distance adjustment mechanism of a sewing machine according to claim 1, characterized in that: One end of each of the fixing blocks (3) and the insertion rod (5) is fixedly connected with a stopper (12).

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