Suitcase sewing auxiliary positioning device

Abstract

An auxiliary positioning device for bag sewing belongs to the technical field of bag sewing positioning and comprises a shell, two positioning assemblies are arranged on the shell in a bilateral symmetry mode, each positioning assembly comprises a rotating shaft rotationally arranged in an inner cavity of the shell in the vertical direction, and the top end of each rotating shaft extends upwards out of the outer wall of the shell and is provided with an external thread. By means of the arrangement of the two positioning blocks, auxiliary positioning can be carried out during bag sewing, an operator can more accurately grasp the sewing angle and position under the assistance of the positioning blocks, sewing deviation is avoided, the left positioning block and the right positioning block are symmetrically arranged, it is effectively guaranteed that two corners are in bilateral symmetry after follow-up bag sewing, and the sewing efficiency is improved. The finished product percent of pass of case sewing is guaranteed, the positioning block has a rotating function, that is, the positions of the right-angle corner and the arc corner on the positioning block can be adjusted as required, and the equipment is promoted to meet different auxiliary requirements of case right-angle sewing and arc sewing.

Description

Technical Field

[0001] The utility model belongs to the technical field of luggage stitching positioning, and particularly relates to a luggage stitching auxiliary positioning device. Background Art

[0002] Luggage stitching is an important link in the luggage production process, mainly connecting each part of the luggage through stitching to form a complete luggage structure.

[0003] In the related art (publication number: CN215976338U), an automated luggage stitching device with a shoulder strap positioning structure is disclosed, including a sewing machine main body, a fixing mechanism and a connecting mechanism. A stitching mechanism is installed on the right side of the top of the sewing machine main body. A needle head mechanism is installed at the bottom of the stitching mechanism. Disassembly rods are inserted at both ends of the card slots away from each other. Positioning cylinders are sleeved on the surfaces of the disassembly rods, and the ends of the positioning cylinders close to each other are fixedly connected to the needle head mechanism. Pressing blocks are fixedly connected to the ends of the disassembly rods away from each other. This enables the user to avoid manually flattening the fabric, thus enabling the user to better stitch the fabric, reducing the user's workload, improving the user experience, reducing the time for the user to disassemble and assemble the needle block, improving the practicality of the device, and improving the user's work efficiency.

[0004] Currently, when stitching the corner angles of a luggage, there is a lack of an effective auxiliary positioning device. During the stitching process, the operator is difficult to accurately grasp the stitching position and angle, prone to stitching deviation, and due to the lack of precise positioning, the left and right stitching will be asymmetrical, thus affecting the qualified rate of the stitched luggage, increasing the workload of subsequent adjustment and repair, and reducing the production efficiency. Summary of the Utility Model

[0005] Aiming at the problems in the prior art that when stitching the corner angles of a luggage, there is a lack of an effective auxiliary positioning device, the operator is difficult to accurately grasp the stitching position and angle during the stitching process, prone to stitching deviation and left - right stitching asymmetry, affecting the qualified rate of the stitched luggage, etc., the utility model provides a luggage stitching auxiliary positioning device. With the setting of two positioning blocks, it can assist in positioning during luggage stitching. With the assistance of the positioning blocks, the operator can more accurately grasp the stitching angle and position, avoid stitching deviation, and the left and right positioning blocks are symmetrically arranged, effectively ensuring the left - right symmetry at the two corners after subsequent luggage stitching, ensuring the qualified rate of the stitched luggage, reducing the workload of subsequent adjustment and repair, and improving the production efficiency. The specific technical solution is as follows:

[0006] A luggage sewing auxiliary positioning device, comprising a housing, wherein two sets of positioning components are symmetrically arranged on the left and right of the housing. Each set of positioning components includes a rotating shaft rotatably arranged in the inner cavity of the housing along the vertical direction. The top end of the rotating shaft extends upward out of the outer wall of the housing and is provided with an external thread. A positioning block is sleeved on the rotating shaft. Right-angle corners and arc-shaped corners are respectively arranged on both sides of the positioning block, and the right-angle corners and arc-shaped corners at the positioning block can be rotated and switched as required.

[0007] In the above technical solution, gears are respectively installed at the bottom ends of the outer walls of the two rotating shafts. Rack bars are respectively meshed and connected to the front sides of the two gears, and the two rack bars are arranged to move relative to each other through a driving component;

[0008] The driving component includes driving rods respectively rotatably connected to the two rack bars, and further includes a moving seat rotatably connected to the two driving rods. A slider is fixedly installed at the bottom end of the moving seat. A chute is opened at the bottom end of the inner wall of the housing from front to back. A lead screw is rotatably arranged in the chute. The slider is threadedly sleeved on the lead screw, and the slider is slidably embedded in the inner cavity of the chute. A motor is installed on the front side wall of the housing, and the output end of the motor is connected to the lead screw.

[0009] In the above technical solution, the two driving rods are arranged in an expanding trend from front to back, and the two driving rods are symmetric about the moving seat left and right.

[0010] In the above technical solution, a limiting component is arranged at the rack bar;

[0011] The limiting component includes two mounting seats fixedly installed at the bottom end of the inner cavity of the housing. A smooth rod is fixedly installed between the two mounting seats. Sleeve blocks are respectively fixedly installed on the front side walls of the two rack bars, and the sleeve blocks are slidably sleeved on the smooth rod.

[0012] In the above technical solution, through holes are respectively penetrated through the left and right side walls of the housing, and the positions of the rack bars correspond to the through holes.

[0013] In the above technical solution, a sliding component is arranged at the bottom end of the rack bar;

[0014] The sliding component includes a bottom plate fixedly installed at the bottom end of the inner wall of the housing. A vertical plate is fixedly and vertically arranged on the bottom plate. A sliding seat is fixedly installed at the bottom end of the rack bar. A groove is opened at the bottom end of the sliding seat. Mounting frames are symmetrically installed on the front and rear sides of the inner wall of the groove. Rollers are rotatably arranged at the mounting frames, and the rollers are in rolling contact with the side wall of the vertical plate.

[0015] In the above technical solution, a support piece is fixedly installed on the rotating shaft, a convex block is fixedly installed on the side wall of the rotating shaft, the convex block is arranged on the support piece, an installation groove adapted to the convex block is formed in the center of the positioning block, and a nut is threadedly sleeved on the top end of the rotating shaft;

[0016] Wherein, the outer wall of the bottom end of the positioning block fits the outer wall of the top end of the support piece, and the outer wall of the bottom end of the nut fits the outer wall of the top end of the positioning block.

[0017] In the above technical solution, the cross-sectional shape of the convex block is trapezoidal.

[0018] Compared with the prior art, the beneficial effects of a sewing auxiliary positioning device for a luggage of the present utility model are as follows:

[0019] First, aiming at the problem that there is a lack of an effective auxiliary positioning device during the sewing of the corner angle of the luggage at present, it is difficult for the operator to accurately grasp the sewing position and angle during the sewing process, and there is a situation of asymmetric left and right sewing, which increases the workload of subsequent adjustment and repair and reduces the production efficiency. With the setting of two positioning blocks, the present utility model can assist in positioning during the sewing of the luggage. With the assistance of the positioning blocks, the operator can more accurately grasp the sewing angle and position, avoid sewing deviation, and the left and right two positioning blocks are symmetrically arranged, effectively ensuring the left and right symmetry at the two corners after the subsequent sewing of the luggage, ensuring the qualified rate of the finished product of the luggage sewing, reducing the workload of subsequent adjustment and repair, and improving the production efficiency;

[0020] Second, the positioning block of the present utility model has a rotating function, that is, it can adjust the positions of the right-angle corner and the arc corner on the positioning block as needed, so that the device meets the different auxiliary requirements of right-angle sewing and arc sewing of the luggage, and provides more accurate and diversified positioning support for the luggage sewing process;

[0021] Third, through the cooperation of the driving rod, the rack and the gear, the present utility model can realize the synchronous rotation of the left and right two positioning blocks, so as to realize the synchronous adjustment of the positions of the right-angle corner and the arc corner of the two positioning blocks as needed, and the states of the two positioning blocks after adjustment are the same and symmetric left and right, without subsequent adjustment;

[0022] Fourth, through the motor, the slider, the moving seat and the lead screw, the present utility model can synchronously drive the two driving rods to move, and then realize the synchronous rotation of the two racks and the positioning blocks, and the coordination of the adjustment of the two positioning blocks is higher;

[0023] Fifth, through the sleeve block, the mounting seat and the optical rod, the present utility model can ensure the movement of the rack along the horizontal direction. Through the vertical plate, the sliding seat, the groove body and the roller, the bottom end of the rack can be slidably supported to ensure the stable movement of the rack in the horizontal direction;

[0024] VI. The utility model can position the positioning block and the gear through the supporting piece, the convex block, the mounting groove and the nut, ensuring their subsequent coaxial rotation. At the same time, it can realize the assembly of positioning blocks of different sizes on the rotating shaft to adapt to the requirements of auxiliary positioning for sewing at the corners of suitcases of different sizes;

[0025] VII. By setting the extension plate, the utility model can extend the upper tabletop of the housing, providing a larger processing space for the sewing process of the suitcase;

[0026] In summary, with the help of the two positioning blocks, the utility model can assist in positioning during the sewing of the suitcase. With the assistance of the positioning blocks, the operator can more accurately grasp the sewing angle and position, avoiding sewing deviation. Moreover, the left and right positioning blocks are symmetrically arranged, effectively ensuring the left-right symmetry of the two corners after the subsequent sewing of the suitcase, guaranteeing the qualified rate of the sewn suitcase products, reducing the workload of subsequent adjustment and repair, improving production efficiency. In addition, the positioning block has a rotating function, that is, the positions of the right-angle corner and the arc corner on the positioning block can be adjusted as needed, enabling the equipment to meet the different auxiliary requirements of right-angle sewing and arc sewing of the suitcase, and providing more accurate and diversified positioning support for the suitcase sewing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural view of the positioning block of the utility model;

[0028] Figure 2 is a schematic sectional structural view of the housing of the utility model;

[0029] Figure 3 is a schematic structural view of the slider of the utility model;

[0030] Figure 4 is a schematic rear view structural view of the extension plate of the utility model;

[0031] Figure 5 is a schematic structural view of the convex block of the utility model;

[0032] Figure 6 is a schematic left view structural view of the sliding seat of the utility model;

[0033] Figures 1 to 6 In the figure, 1. housing, 2. rotating shaft, 3. positioning block, 4. gear, 5. rack, 6. driving rod, 7. moving seat, 8. chute, 9. lead screw, 10. slider, 11. motor, 12. through hole, 13. sleeve block, 14. mounting seat, 15. smooth rod, 16. bottom plate, 17. vertical plate, 18. sliding seat, 19. groove body, 20. mounting frame, 21. roller, 22. supporting piece, 23. convex block, 24. mounting groove, 25. nut, 26. extension plate, 27. base, 28. support arm. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will further illustrate the present utility model in conjunction with specific implementation cases and the attached Figures 1 to 6 drawings, but the present utility model is not limited to these embodiments.

[0035] Mainly refer to Figures 1 to 6 As shown, a bag sewing auxiliary positioning device includes a housing 1. Two groups of positioning components are symmetrically arranged on the left and right sides of the housing 1. Each group of positioning components includes a rotating shaft 2 rotatably arranged in the inner cavity of the housing 1 along the vertical direction through a bearing. The top end of the rotating shaft 2 extends upward out of the outer wall of the housing 1 and is provided with an external thread. A positioning block 3 is sleeved on the rotating shaft 2. Right-angle corners and arc-shaped corners are respectively arranged on both sides of the positioning block 3. The right-angle corners and arc-shaped corners at the positioning block 3 can be rotated and switched as required, and the positions of the right-angle corners and arc-shaped corners on the positioning block 3 can be adjusted as required, so as to enable this device to meet the different auxiliary requirements of right-angle sewing and arc-shaped sewing of bags, and provide more accurate and diversified positioning support for the bag sewing process.

[0036] Specifically, mainly refer to Figure 2 and Figure 3 As shown, gears 4 are respectively installed at the bottom ends of the outer walls of the two rotating shafts 2. Rack bars 5 are respectively meshed and connected to the front sides of the two gears 4. The two rack bars 5 are relatively movably arranged through a driving component. The driving component is used to drive the two rack bars 5 to move relatively, and then drive the two gears 4 to drive the two rotating shafts 2 and the positioning block 3 to rotate in corresponding directions; the driving component includes driving rods 6 respectively rotatably connected to the two rack bars 5 through pins, and also includes a moving seat 7 rotatably connected to the two driving rods 6. A slider 10 is fixedly installed at the bottom end of the moving seat 7. A chute 8 is opened on the bottom end inner wall of the housing 1 from front to back. A lead screw 9 is rotatably arranged in the chute 8. The slider 10 is threadedly sleeved on the lead screw 9, and the slider 10 is slidably embedded in the inner cavity of the chute 8. A motor 11 is installed on the front side wall of the housing 1, and the output end of the motor 11 is connected to the lead screw 9;

[0037] By starting the motor 11 to drive the lead screw 9 to rotate, the slider 10 is driven to move along the inner cavity of the chute 8, so as to drive one end of the driving rod 6 by the moving seat 7 to move, and push the other end of the driving rod 6 to drive the rack bar 5 to move; as the rack bar 5 moves, the two gears 4 are driven to rotate relatively, realizing the synchronous relative rotation of the two positioning blocks 3, and thus realizing the adjustment of the corner shapes arranged at the two positioning blocks 3 to the required positions.

[0038] Specifically refer to Figure 3 As shown, the two driving rods 6 are arranged in an expanding trend from front to back, and the two driving rods 6 are symmetric about the moving seat 7, so as to ensure that when the moving seat 7 moves, the two driving rods 6 can be driven to move synchronously and by the same distance, so as to ensure the subsequent synchronous rotation of the two rack bars 5, gears 4, rotating shafts 2 and positioning blocks 3.

[0039] Refer also to Figure 2 As shown, a limit component is provided at the rack 5; the limit component includes two mounting seats 14 fixedly installed at the bottom end of the inner cavity of the housing 1, a smooth rod 15 is fixedly installed between the two mounting seats 14, sleeve blocks 13 are respectively fixedly installed on the front side walls of the two racks 5, and the sleeve blocks 13 are slidably sleeved on the smooth rod 15. The other end of the driving rod 6 drives the rack 5 to move. At this time, the sleeve blocks 13 on the outer wall of the rack 5 slide along the outer wall of the smooth rod 15 to limit the moving direction of the rack 5.

[0040] Mainly refer to Figure 2 As shown, through holes 12 are respectively formed through the left and right side walls of the housing 1, and the positions of the rack 5 and the through holes 12 are correspondingly arranged, so as to ensure that when the rack 5 moves outward, it can penetrate through the through holes 12, avoiding the interference of the housing 1 on the horizontal movement of the rack 5.

[0041] Also mainly refer to Figure 3 and Figure 6 As shown, a sliding component is provided at the bottom end of the rack 5; the sliding component includes a bottom plate 16 fixedly installed at the bottom end of the inner wall of the housing 1, a vertical plate 17 is fixedly and vertically installed on the bottom plate 16, a sliding seat 18 is fixedly installed at the bottom end of the rack 5, a groove 19 is formed at the bottom end of the sliding seat 18, mounting frames 20 are symmetrically installed on the front and rear sides of the inner wall of the groove 19, and rollers 21 are rotatably arranged at the mounting frames 20 through pin shafts. The rollers 21 are in rolling contact with the side wall of the vertical plate 17. As the rack 5 moves, the sliding seat 18 can be driven to slide along the outer wall of the vertical plate 17, so as to cause the rollers 21 to roll along the side wall of the vertical plate 17, and promote the sliding seat 18 to smoothly move along the side wall of the vertical plate 17, thereby ensuring that the rack 5 can smoothly move in the horizontal direction.

[0042] Mainly refer to Figure 1 and Figure 5 As shown, a support piece 22 is fixedly installed on the rotating shaft 2, a convex block 23 is fixedly installed on the side wall of the rotating shaft 2, and the convex block 23 is arranged on the support piece 22. An installation groove 24 adapted to the convex block 23 is formed in the center of the positioning block 3. A nut 25 is threadedly sleeved on the top end of the rotating shaft 2. Among them, the outer wall of the bottom end of the positioning block 3 is attached to the top outer wall of the support piece 22, and the outer wall of the bottom end of the nut 25 is attached to the top outer wall of the positioning block 3; the nut 25 is screwed out from the top end of the rotating shaft 2, and the positioning block 3 is lifted upward along the outer wall of the rotating shaft 2, so that the installation groove 24 is disengaged upward along the convex block 23 to complete the disassembly of the positioning block 3; a new positioning block 3 is sleeved on the rotating shaft 2, and the position of the installation groove 24 is made to correspond to the position of the convex block 23. Until the bottom end of the positioning block 3 is attached to the upper surface of the support piece 22, the nut 25 is screwed into the top end of the rotating shaft 2, and the outer wall of the nut 25 is made to fit the upper surface of the new positioning block 3 to realize the assembly of the new positioning block 3 at the rotating shaft 2.

[0043] Specifically refer to Figure 5As shown, the cross-sectional shape of the bump 23 is set as a trapezoid. Through the trapezoidal bump 23, it can be ensured that after the bump 23 is embedded into the inner cavity of the installation groove 24, the tight connection between the rotating shaft 2 and the positioning block 3 can be realized, and it can be ensured that the subsequent rotation of the rotating shaft 2 can smoothly drive the positioning block 3 to rotate.

[0044] It is worth noting that in this application, the motor 11 uses a self-locking motor that can lock the output end commonly used in the market. Its output end can be self-locked when it stops operating and will not rotate under external force. And the motor 11 is a commonly used forward and reverse motor in the market, and its output end can rotate forward or backward according to the usage requirements, and it can meet the above usage requirements; there is no need to elaborate on the above existing components too much here.

[0045] The working principle of a kind of luggage sewing auxiliary positioning device in this embodiment is as follows:

[0046] Adjust the positions of the right-angle corners and arc corners of the positioning block 3 as needed in advance: drive the lead screw 9 to rotate through the started motor 11, and then drive the slider 10 to move along the inner cavity of the chute 8, so as to prompt the moving seat 7 to drive one end of the driving rod 6 to move, so as to push the other end of the driving rod 6 to drive the rack 5 to move. At this time, the sleeve block 13 on the outer wall of the rack 5 slides along the outer wall of the optical rod 15 to limit the moving direction of the rack 5; as the rack 5 moves, drive the two gears 4 to rotate relatively, and realize the synchronous relative rotation of the two positioning blocks 3, so as to adjust the corner shape set at the two positioning blocks 3 to the required position;

[0047] As the rack 5 moves, it can drive the sliding seat 18 to slide along the outer wall of the vertical plate 17, so as to prompt the roller 21 to roll along the side wall of the vertical plate 17, and prompt the sliding seat 18 to move smoothly along the side wall of the vertical plate 17, so as to ensure that the rack 5 can move smoothly in the horizontal direction;

[0048] When sewing the corner of the luggage, place the luggage on the housing 1 and the extension plate 26, and ensure that the luggage is located below the two positioning blocks 3, and ensure that the corner of the luggage to be sewn is located below the corners of the two positioning blocks 3, so as to ensure that accurate auxiliary positioning of the corner of the luggage can be realized by sewing according to the corners of the positioning blocks 3 subsequently;

[0049] When it is necessary to replace the positioning block 3 of different sizes, screw out the nut 25 from the top end of the rotating shaft 2, lift the positioning block 3 upward along the outer wall of the rotating shaft 2, and prompt the installation groove 24 to disengage from the bump 23 upward to complete the disassembly of the positioning block 3; sleeved the new positioning block 3 on the rotating shaft 2, and ensure that the position of the installation groove 24 corresponds to the position of the bump 23. Until the bottom end of the positioning block 3 fits the upper surface of the support piece 22, screw the nut 25 into the top end of the rotating shaft 2, and ensure that the outer wall of the nut 25 fits the upper surface of the new positioning block 3 to realize the assembly of the new positioning block 3 at the rotating shaft 2;

[0050] With the aid of the arrangement of the two positioning blocks 3, the utility model can assist in positioning during the stitching of the luggage case. With the assistance of the positioning blocks 3, the operator can more accurately grasp the stitching angle and position, avoid stitching deviation, and the left and right positioning blocks 3 are symmetrically arranged, effectively ensuring that the two corners are symmetrical left and right after the subsequent stitching of the luggage case, ensuring the qualified rate of the finished product of the luggage case stitching, reducing the workload of subsequent adjustment and repair, and improving the production efficiency. In addition, the positioning block 3 has a rotation function, that is, the positions of the right-angle corner and the arc corner on the positioning block 3 can be adjusted as required, enabling this equipment to meet the different auxiliary requirements of right-angle stitching and arc stitching of the luggage case, and providing more accurate and diversified positioning support for the luggage case stitching process.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A luggage stitching auxiliary positioning device, comprising a housing (1), characterized in that, The housing (1) is symmetrically provided with two groups of positioning components on the left and right. Each group of positioning components includes a rotating shaft (2) rotatably arranged in the inner cavity of the housing (1) in the vertical direction. The top end of the rotating shaft (2) extends upward out of the outer wall of the housing (1) and is provided with an external thread. A positioning block (3) is sleeved on the rotating shaft (2). Right-angle corners and arc-shaped corners are respectively arranged on both sides of the positioning block (3), and the right-angle corner and the arc-shaped corner at the positioning block (3) are switched as required by rotation.

2. The auxiliary positioning device for sewing a luggage case according to claim 1, wherein: Gears (4) are respectively installed at the bottom ends of the outer walls of the two rotating shafts (2). Rack bars (5) are respectively meshed and connected to the front sides of the two gears (4). The two rack bars (5) are relatively moved by a driving component; The driving component includes driving rods (6) respectively rotatably connected to the two rack bars (5), and further includes a moving seat (7) rotatably connected to the two driving rods (6). A slider (10) is fixedly installed at the bottom end of the moving seat (7). A chute (8) is opened on the inner wall bottom end of the housing (1) from front to back. A lead screw (9) is rotatably arranged in the chute (8). The slider (10) is threadedly sleeved on the lead screw (9), and the slider (10) is slidably embedded in the inner cavity of the chute (8). A motor (11) is installed on the front side wall of the housing (1), and the output end of the motor (11) is connected to the lead screw (9).

3. The auxiliary positioning device for suitcase stitching according to claim 2, characterized in that: The two driving rods (6) are arranged in an expanding trend from front to back, and the two driving rods (6) are symmetric about the moving seat (7) in the left-right direction.

4. The auxiliary positioning device for sewing a luggage case according to claim 2, wherein: A limiting component is arranged at the rack bar (5); The limiting component includes two mounting seats (14) fixedly installed at the bottom end of the inner cavity of the housing (1). A smooth rod (15) is fixedly installed between the two mounting seats (14). Sleeve blocks (13) are respectively fixedly installed on the front side walls of the two rack bars (5). The sleeve blocks (13) are slidably sleeved on the smooth rod (15).

5. The stitching auxiliary positioning device for a luggage according to claim 4, wherein: Through holes (12) are respectively penetrated and opened on the left and right side walls of the housing (1), and the positions of the rack bars (5) are correspondingly arranged with the through holes (12).

6. The auxiliary positioning device for stitching a luggage case according to claim 2, wherein: A sliding component is arranged at the bottom end of the rack bar (5); The sliding component includes a bottom plate (16) fixedly installed at the bottom end of the inner wall of the housing (1). A vertical plate (17) is fixedly and vertically arranged on the bottom plate (16). A sliding seat (18) is fixedly installed at the bottom end of the rack bar (5). A groove body (19) is opened at the bottom end of the sliding seat (18). Mounting frames (20) are symmetrically installed on the front and back sides of the inner wall of the groove body (19). Rollers (21) are rotatably arranged at the mounting frames (20), and the rollers (21) are in rolling contact with the side wall of the vertical plate (17).

7. The auxiliary positioning device for suitcase stitching according to claim 1, characterized in that: A supporting piece (22) is fixedly installed on the rotating shaft (2). A convex block (23) is fixedly installed on the side wall of the rotating shaft (2). The convex block (23) is arranged on the supporting piece (22). An installation groove (24) adapted to the convex block (23) is opened at the center of the positioning block (3). A nut (25) is threadedly sleeved on the top end of the rotating shaft (2); Wherein, the outer wall of the bottom end of the positioning block (3) is attached to the outer wall of the top end of the support piece (22), and the outer wall of the bottom end of the nut (25) is attached to the outer wall of the top end of the positioning block (3).

8. The stitching auxiliary positioning device for a luggage according to claim 7, wherein: The cross-sectional shape of the convex block (23) is trapezoidal.

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