Self-made small U-shaped card device

Abstract

The utility model relates to the technical field of U-shaped clamp devices, in particular to a self-made small U-shaped clamp device. Comprising a fixed base, a pressing rod, a limiting ring, an external thread sleeve, an internal thread sleeve, an arc-shaped clamping base, a limiting clamping groove, a limiting clamping plate, a sliding groove, a sliding block, a sliding rod, a reset spring, a shifting block, a connecting rod, a mounting assembly, a reset assembly, a placing assembly and an adjusting assembly, and the internal thread sleeve is arranged on the side wall of the placing assembly; a pressing rod is arranged on the side wall of the mounting assembly, an external threaded sleeve is arranged on the side wall of the pressing rod, the internal threaded sleeve is in threaded connection with the external threaded sleeve, two adjusting assemblies are arranged in the other side of the fixing base, and two arc-shaped clamping bases are arranged above the fixing base. In the whole process, accurate adjustment and efficient pressing of the inner diameter of the U-shaped clamping piece are achieved, the manufacturing flexibility is improved, and the working efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of U-shaped card device technology, and in particular to a self-made small U-shaped card device. Background Technology

[0002] In the manufacturing industry, U-shaped fasteners are a common type of connector and are widely used in various mechanical equipment and structures to fix, connect or protect various components. The traditional manufacturing process of U-shaped fasteners usually involves mold pressing or manual bending. These methods have certain limitations in terms of efficiency and precision. In particular, when it is necessary to produce U-shaped fasteners with different inner diameters, mold changing or manual adjustment is not only time-consuming and labor-intensive, but also makes it difficult to ensure product consistency and precision.

[0003] In practical applications, in order to improve the production efficiency and manufacturing precision of U-shaped clamps, some automated and semi-automated production equipment has been introduced into production lines in recent years. However, these devices are often complex in structure, expensive, and poorly adaptable to the needs of small-batch, multi-variety production. In addition, when adjusting the inner diameter of U-shaped clamps, these devices usually rely on mechanical adjustment mechanisms, whose adjustment range and precision are often limited, making it difficult to meet the needs of diversified production. Improvements are urgently needed to address the problem of inconvenience in achieving precise adjustment and efficient pressing of the inner diameter of U-shaped clamps.

[0004] Therefore, to address the aforementioned problem of inconvenience in accurately adjusting and efficiently pressing the inner diameter of U-shaped clamps, a self-made small U-shaped clamp device can be designed. During use, multiple sets of external threaded sleeves have different outer diameters. The operator can select the appropriate external threaded sleeve based on the inner diameter of the U-shaped clamp to be pressed. Then, the external threaded sleeve is fitted onto the side wall of the pressing rod and threadedly connected and fixed to the internal threaded sleeve. Next, the material to be processed is placed on two sets of adjustable-spaced arc-shaped clamp seats. When adjusting the arc-shaped clamp seats, manually pushing the lever backward will cause the limiting clamp to disengage from the limiting groove via the connecting rod. At this time, the lever simultaneously drives the sliding slider to adjust and move via the sliding rod. The return spring deforms under compression and then... Pulling the side-mounted arc-shaped bracket can drive the adjustment component to move and adjust. After the spacing is adjusted, releasing the lever allows the sliding slider to move the limit plate back to its original position, based on the elastic characteristics of the reset spring. The limit plate then re-engages into the corresponding limit slot, stabilizing the arc-shaped bracket. Afterward, the operator manually presses one end of the pressing rod, and the external threaded sleeve applies pressure to the material sheet, causing it to deform into a U-shaped clamp. During this process, the mounting component rotates with the pressing action, and the reset component stretches and stores energy. Once the pressing rod is released, the reset component releases energy, driving the mounting component and the pressing rod to reset, ready for the next operation. The entire process achieves precise adjustment and efficient pressing of the inner diameter of the U-shaped clamp, which not only improves manufacturing flexibility but also significantly enhances work efficiency, meeting diverse production needs. Utility Model Content

[0005] In order to improve the production efficiency and manufacturing precision of U-shaped clamps during use, some automated and semi-automated production equipment has been introduced into production lines in recent years. However, these devices are often complex in structure, expensive, and poorly adaptable to the needs of small-batch, multi-variety production. In addition, when adjusting the inner diameter of U-shaped clamps, these devices usually rely on mechanical adjustment mechanisms, whose adjustment range and precision are often limited, making it difficult to meet the needs of diversified production. Therefore, improvements are urgently needed to address the problem of inconvenience in achieving precise adjustment and efficient pressing of the inner diameter of U-shaped clamps.

[0006] The technical solution of this utility model is as follows: a self-made small U-shaped card device, including a fixed base, a pressing rod, a limiting ring, an external threaded sleeve, an internal threaded sleeve, an arc-shaped card seat, a limiting card groove, a limiting card plate, a sliding groove, a sliding slider, a sliding rod, a return spring, a toggle block, a connecting rod, an installation component, a reset component, a placement component, and an adjustment component. A placement component is provided on the upper side of one side of the fixed base, and an internal threaded sleeve is provided on the side wall of the placement component. An installation component is provided above the fixed base, and two sets of reset components are provided on both sides of the installation component. A pressing rod is provided on the side wall of the installation component, and a limiting ring is provided on the side wall of the pressing rod. An external threaded sleeve is provided on the side wall of the pressing rod, and the internal threaded sleeve is threadedly connected to the external threaded sleeve. The fixed base... On the other side, two sets of adjustment components are provided inside. Two sets of arc-shaped brackets are provided above the fixed base. The bottom wall of the arc-shaped brackets is fixedly connected to the top of the adjustment components. A sliding groove is provided on the side wall of the arc-shaped bracket. A sliding rod is provided inside the sliding groove. A sliding slider is provided on the side wall of the sliding rod. The sliding slider is slidably connected to the sliding rod. Two sets of return springs are provided on both sides of the sliding slider. One end of the return spring is fixedly connected to the inner wall of the sliding groove. The other end of the return spring is fixedly connected to the inner wall of the sliding slider. A toggle block is provided on the side wall of the sliding slider. A connecting rod is provided below the toggle block. A limit plate is provided at the lower end of the connecting rod. A limit slot is provided on the upper side of the other side of the fixed base. The limit plate is engaged with the limit slot.

[0007] Preferably, during the use of the U-shaped clamp device, the outer diameter of multiple sets of external threaded sleeves is set differently. The operator can select the appropriate external threaded sleeve according to the inner diameter of the U-shaped clamp to be pressed. Then, the external threaded sleeve is fitted onto the side wall of the pressing rod and threadedly connected and fixed with the internal threaded sleeve. Next, the material to be processed is placed on two sets of adjustable-space arc-shaped clamp seats. When adjusting the arc-shaped clamp seats, manually pushing the lever backward will cause the limiting clamp to disengage from the limiting groove through the connecting rod. At this time, the lever simultaneously drives the sliding slider to adjust the movement through the sliding rod. The return spring is compressed and deformed. Then, pulling the arc-shaped clamp seat to one side will drive the adjustment component to adjust the position. After the spacing adjustment is completed, release the lever. Based on the elastic characteristics of the reset spring, the sliding slider can drive the limit plate to achieve reset movement. The limit plate re-engages into the corresponding limit slot, stabilizing the position of the arc-shaped card seat. Then, the operator manually presses one end of the pressing rod, and the external threaded sleeve applies pressure to the material sheet, causing it to deform into a U-shaped card. During this process, the mounting component rotates with the pressing action, and the reset component stretches and stores energy. Once the pressing rod is released, the reset component releases energy, driving the mounting component and the pressing rod to reset, ready for the next operation. The entire process achieves precise adjustment and efficient pressing of the inner diameter of the U-shaped card, which not only improves manufacturing flexibility but also significantly enhances work efficiency and meets diverse production needs.

[0008] Preferably, the mounting assembly includes mounting blocks and mounting shafts. The mounting blocks are positioned above the fixed base, and there are two sets of mounting blocks, with the mounting shafts positioned between the two sets of mounting blocks.

[0009] Preferably, the mounting assembly also includes a mounting hole, the mounting block has a mounting hole inside, and the other end of the pressing rod is disposed on the side wall of the mounting shaft. The pressing rod is rotatably connected to the mounting block through the mounting shaft.

[0010] Preferably, the reset assembly includes a spiral spring, with two sets of spiral springs provided at both ends of the mounting shaft. One end of the spiral spring is fixedly connected to the inner wall of the mounting hole, and the other end of the spiral spring is fixedly connected to one end of the mounting shaft.

[0011] Preferably, the placement assembly includes a placement base and a placement support. The placement base is provided on one side of the fixed base, and multiple sets of placement supports are provided on the top of the placement base. An internally threaded sleeve is provided on the side wall of the placement support.

[0012] Preferably, the adjustment assembly includes an adjustment groove, an adjustment rod, and an adjustment slider. Two sets of adjustment grooves are provided inside the other side of the fixed base. An adjustment rod is provided inside the adjustment groove. An adjustment slider is provided on the side wall of the adjustment rod. The adjustment slider is slidably connected to the adjustment rod. The bottom wall of the arc-shaped card seat is fixedly connected to the top of the adjustment slider.

[0013] Preferably, the adjustment assembly also includes an adjustment spring. Two sets of adjustment springs are provided on both sides of the adjustment slider. One end of the adjustment spring is fixedly connected to the inner wall of the adjustment groove, and the other end of the adjustment spring is fixedly connected to the inner wall of the adjustment slider.

[0014] The beneficial effects of this utility model are:

[0015] When using the U-shaped clamping device, the outer diameter of multiple sets of external threaded sleeves is set differently. The operator can select the appropriate external threaded sleeve according to the inner diameter of the U-shaped clamp to be pressed. Then, the external threaded sleeve is fitted onto the side wall of the pressing rod and threadedly connected and fixed with the internal threaded sleeve. Next, the material to be processed is placed on the two sets of adjustable-space arc-shaped clamping seats. When adjusting the arc-shaped clamping seats, manually pushing the lever backward will cause the limiting clamp to disengage from the limiting clamping slot through the connecting rod. At this time, the lever simultaneously drives the sliding slider to adjust the movement through the sliding rod. The return spring is compressed and deformed. Then, pulling the arc-shaped clamping seat to one side will drive the adjusting component to adjust the movement. After the spacing adjustment is completed, release the lever. Based on the elastic characteristics of the reset spring, the sliding slider can drive the limit plate to achieve reset movement. The limit plate re-engages into the corresponding limit slot, stabilizing the position of the arc-shaped card seat. Then, the operator manually presses one end of the pressing rod, and the external threaded sleeve applies pressure to the material sheet, causing it to deform into a U-shaped card. During this process, the mounting component rotates with the pressing action, and the reset component stretches and stores energy. Once the pressing rod is released, the reset component releases energy, driving the mounting component and the pressing rod to reset, ready for the next operation. The entire process achieves precise adjustment and efficient pressing of the inner diameter of the U-shaped card, which not only improves manufacturing flexibility but also significantly enhances work efficiency and meets diverse production needs. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the self-made small U-shaped card device of this utility model;

[0017] Figure 2 The diagram shown is a partial three-dimensional structural schematic of the self-made small U-shaped card device of this utility model;

[0018] Figure 3 The diagram shown is a partial three-dimensional structural schematic of the self-made small U-shaped card device of this utility model;

[0019] Figure 4 The diagram shown is a partial three-dimensional structural schematic of the self-made small U-shaped card device of this utility model.

[0020] Figure 5 The diagram shown is a partial three-dimensional structural schematic of the self-made small U-shaped card device of this utility model.

[0021] Figure 6 The diagram shown is a partial three-dimensional structural schematic of the self-made small U-shaped card device of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Fixed base; 2. Pressing rod; 3. Limiting ring; 4. External threaded sleeve; 5. Internal threaded sleeve; 6. Arc-shaped retainer; 7. Limiting groove; 8. Limiting plate; 9. Sliding groove; 10. Sliding slider; 11. Sliding rod; 12. Return spring; 13. Actuating block; 14. Connecting rod; 101. Mounting block; 102. Mounting shaft; 103. Mounting hole; 201. Scroll spring; 301. Placement base; 302. Placement support; 401. Adjustment groove; 402. Adjustment rod; 403. Adjustment slider; 404. Adjustment spring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figures 1-6 This utility model provides an embodiment of a self-made small U-shaped card device, including a fixed base 1, a pressing rod 2, a limiting ring 3, an external threaded sleeve 4, an internal threaded sleeve 5, an arc-shaped card seat 6, a limiting card groove 7, a limiting card plate 8, a sliding groove 9, a sliding slider 10, a sliding rod 11, a return spring 12, a toggle block 13, a connecting rod 14, an installation component, a reset component, a placement component, and an adjustment component. A placement component is provided on the upper side of one side of the fixed base 1, and an internal threaded sleeve 5 is provided on the side wall of the placement component. An installation component is provided above the fixed base 1, and two sets of reset components are provided on both sides of the installation component. A pressing rod 2 is provided on the side wall of the installation component, and a limiting ring 3 is provided on the side wall of the pressing rod 2. An external threaded sleeve 4 is provided on the side wall of the pressing rod 2, and the internal threaded sleeve 5 is threadedly connected to the external threaded sleeve 4. The other side of the fixed base 1... The unit is equipped with two sets of adjustment components. Two sets of arc-shaped brackets 6 are provided above the fixed base 1. The bottom wall of the arc-shaped brackets 6 is fixedly connected to the top of the adjustment components. A sliding groove 9 is provided on the side wall of the arc-shaped brackets 6. A sliding rod 11 is provided inside the sliding groove 9. A sliding slider 10 is provided on the side wall of the sliding rod. The sliding slider 10 is slidably connected to the sliding rod 11. Two sets of return springs 12 are provided on both sides of the sliding slider 10. One end of the return spring 12 is fixedly connected to the inner wall of the sliding groove 9. The other end of the return spring 12 is fixedly connected to the inner wall of the sliding slider 10. A toggle block 13 is provided on the side wall of the sliding slider 10. A connecting rod 14 is provided below the toggle block 13. A limit plate 8 is provided at the lower end of the connecting rod 14. A limit slot 7 is provided on the upper side of the other side of the fixed base 1. The limit plate 8 is engaged with the limit slot 7.

[0025] Please see Figure 2The mounting assembly includes a mounting block 101 and a mounting shaft 102. The mounting block 101 is positioned above the fixed base 1. Two sets of mounting blocks 101 are provided, and the mounting shaft 102 is positioned between the two sets of mounting blocks 101. The mounting shaft 102 is rotated and adjusted via the mounting blocks 101. The mounting assembly also includes a mounting hole 103. The mounting block 101 has a mounting hole 103 inside. The other end of the pressing rod 2 is positioned on the side wall of the mounting shaft 102. The pressing rod 2 is rotatably connected to the mounting block 101 via the mounting shaft 102. The pressing rod 2 can drive the mounting shaft 102 to rotate and adjust via the mounting block 101. The reset assembly includes a spiral spring 201. Two sets of spiral springs 201 are provided at both ends of the mounting shaft 102. One end of the spiral spring 201 is fixedly connected to the inner wall of the mounting hole 103, and the other end of the spiral spring 201 is fixedly connected to one end of the mounting shaft 102. The spiral spring 201 releases energy to drive the mounting shaft 102 and the pressing rod 2 to reset.

[0026] Please see Figures 3-6 The placement assembly includes a placement base 301 and placement supports 302. The placement base 301 is positioned above one side of the fixed base 1, and multiple sets of placement supports 302 are positioned above the placement base 301. Internally threaded sleeves 5 are mounted on the side walls of the placement supports 302. Multiple sets of externally threaded sleeves 4 are fitted onto the placement base 301 via the multiple sets of placement supports 302 for easy selection and replacement. The adjustment assembly includes an adjustment groove 401, an adjustment rod 402, and an adjustment slider 403. Two sets of adjustment grooves 401 are opened inside the other side of the fixed base 1, and adjustment rods 402 are installed inside the adjustment grooves 401. An adjusting slider 403 is provided on the side wall. The adjusting slider 403 is slidably connected to the adjusting slide rod 402. The bottom wall of the arc-shaped card seat 6 is fixedly connected to the top of the adjusting slider 403. The adjusting slider 403 is guided to slide through the adjusting slide rod 402. The adjusting assembly also includes an adjusting spring 404. Two sets of adjusting springs 404 are provided on both sides of the adjusting slider 403. One end of the adjusting spring 404 is fixedly connected to the inner wall of the adjusting groove 401, and the other end of the adjusting spring 404 is fixedly connected to the inner wall of the adjusting slider 403. According to the elastic characteristics of the adjusting spring 404, the adjusting slider 403 can be driven to reset and be guided through the adjusting slide rod 402.

[0027] During the use of the U-shaped clamp device, multiple sets of external threaded sleeves 4 are placed on top of the placement base 301 via multiple sets of placement supports 302, facilitating selection and replacement. Furthermore, the external threaded sleeves 4 have different outer diameters, allowing the operator to select the appropriate external threaded sleeve 4 based on the inner diameter of the U-shaped clamp to be pressed.

[0028] Then, the external threaded sleeve 4 is fitted onto the side wall of the pressing rod 2 and threadedly connected and fixed to the internal threaded sleeve 5. The two ends of the mounting shaft 102 are connected to the mounting holes 103 in the two sets of mounting blocks 101 through two sets of spiral springs 201, ensuring that the pressing rod 2 has a stable reset capability.

[0029] Next, the material to be processed is placed on two sets of adjustable-gap arc-shaped holders 6. The arc-shaped holders 6 achieve flexible adjustment of the spacing by adjusting the slider 403 within the adjusting groove 401 and by moving the slider 10 within the sliding groove 9.

[0030] During adjustment, manually pushing the lever backward will cause the limiting clip to disengage from the limiting slot 7 via the connecting rod 14. At this time, the lever simultaneously drives the sliding slider 10 to move through the sliding rod 11 for adjustment. The return spring 12 deforms when compressed. Then, pulling the arc-shaped base 6 to one side will drive the adjusting slider 403 to move through the adjusting groove 401 for adjustment.

[0031] After the spacing adjustment is completed, release the lever. Based on the elastic characteristics of the reset spring 12, the sliding slider 10 can drive the limit plate 8 to reset and move. The limit plate 8 re-engages into the corresponding limit slot 7, stabilizing the position of the arc-shaped seat 6. Then, the operator manually presses one end of the pressing rod 2, and the external threaded sleeve 4 applies pressure to the material sheet, causing it to deform and form a U-shaped clamp.

[0032] During this process, the mounting shaft 102 rotates with the pressing action, and the spiral spring 201 stretches and stores energy. Once the pressing rod 2 is released, the spiral spring 201 releases energy, driving the mounting shaft 102 and the pressing rod 2 to reset, ready for the next operation.

[0033] The entire process enables precise adjustment and efficient pressing of the inner diameter of the U-shaped clamp, which not only improves manufacturing flexibility but also significantly enhances work efficiency and meets diverse production needs.

[0034] Through the above steps, when the U-shaped clamp device is in use, the outer diameter of the multiple sets of external threaded sleeves 4 is set differently. The operator can select the appropriate external threaded sleeve 4 according to the inner diameter of the U-shaped clamp to be pressed. Then, the external threaded sleeve 4 is sleeved on the side wall of the pressing rod 2 and threadedly connected and fixed with the internal threaded sleeve 5. Next, the material to be processed is placed on the two sets of adjustable-space arc-shaped clamp seats 6. When the arc-shaped clamp seat 6 is adjusted, manually pushing the lever backward will cause the limiting clamp to disengage from the limiting clamp groove 7 through the connecting rod 14. At this time, the lever simultaneously drives the sliding slider 10 to move through the sliding rod 11 to achieve adjustment. The return spring 12 is deformed when squeezed. Then, pulling the arc-shaped clamp seat 6 to one side will drive the adjustment component. The adjustment and movement are achieved. After the spacing is adjusted, the lever is released. Based on the elastic characteristics of the reset spring 12, the sliding slider 10 can drive the limit plate 8 to achieve reset movement. The limit plate 8 re-engages into the corresponding limit slot 7, stabilizing the position of the arc-shaped card seat 6. Then, the operator manually presses one end of the pressing rod 2, and the external threaded sleeve 4 applies pressure to the material sheet, causing it to deform into a U-shaped card. During this process, the mounting component rotates with the pressing action, and the reset component stretches and stores energy. Once the pressing rod 2 is released, the reset component releases energy, driving the mounting component and the pressing rod 2 to reset, ready for the next operation. The whole process realizes precise adjustment and efficient pressing of the inner diameter of the U-shaped card, which not only improves the manufacturing flexibility but also significantly improves the work efficiency and meets the diverse production needs.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A self-made small U-shaped card device, including a fixed base (1), characterized in that: It also includes a pressing rod (2), a limiting ring (3), an external threaded sleeve (4), an internal threaded sleeve (5), an arc-shaped card seat (6), a limiting card groove (7), a limiting card plate (8), a sliding groove (9), a sliding slider (10), a sliding rod (11), a reset spring (12), a toggle block (13), a connecting rod (14), an installation component, a reset component, a placement component, and an adjustment component. A placement component is provided on one side of the fixed base (1), and an internal threaded sleeve (5) is provided on the side wall of the placement component. An installation component is provided on the top of the fixed base (1), and two sets of reset components are provided on both sides of the installation component. A pressing rod (2) is provided on the side wall of the installation component, and a limiting ring (3) is provided on the side wall of the pressing rod (2). An external threaded sleeve (4) is provided on the side wall of the pressing rod (2), and the internal threaded sleeve (5) is threadedly connected to the external threaded sleeve (4). Two sets of adjustment components are provided inside the other side of the fixed base (1). 1) Two sets of arc-shaped card seats (6) are provided above the adjustment component. The bottom wall of the arc-shaped card seat (6) is fixedly connected to the top of the adjustment component. A sliding groove (9) is provided on the side wall of the arc-shaped card seat (6). A sliding rod (11) is provided inside the sliding groove (9). A sliding slider (10) is provided on the side wall of the sliding rod. The sliding slider (10) is slidably connected to the sliding rod (11). Two sets of return springs (12) are provided on both sides of the sliding slider (10). One end of the spring (12) is fixedly connected to the inner wall of the sliding groove (9), and the other end of the return spring (12) is fixedly connected to the inner wall of the sliding slider (10). A toggle block (13) is provided on the side wall of the sliding slider (10), and a connecting rod (14) is provided below the toggle block (13). A limit plate (8) is provided at the lower end of the connecting rod (14), and a limit slot (7) is opened on the upper side of the other side of the fixed base (1). The limit plate (8) and the limit slot (7) are engaged and connected.

2. The self-made miniature U-shaped card device according to claim 1, characterized in that: The mounting assembly includes a mounting block (101) and a mounting shaft (102). The mounting block (101) is provided above the fixed base (1). There are two sets of mounting blocks (101), and the mounting shaft (102) is provided between the two sets of mounting blocks (101).

3. The self-made miniature U-shaped card device according to claim 2, characterized in that: The mounting assembly also includes a mounting hole (103). The mounting block (101) has a mounting hole (103) inside. The other end of the pressing rod (2) is located on the side wall of the mounting shaft (102). The pressing rod (2) is rotatably connected to the mounting block (101) through the mounting shaft (102).

4. The self-made miniature U-shaped card device according to claim 2, characterized in that: The reset assembly includes a spiral spring (201). Two sets of spiral springs (201) are provided at both ends of the mounting shaft (102). One end of the spiral spring (201) is fixedly connected to the inner wall of the mounting hole (103), and the other end of the spiral spring (201) is fixedly connected to one end of the mounting shaft (102).

5. The self-made miniature U-shaped card device according to claim 2, characterized in that: The placement assembly includes a placement base (301) and a placement support (302). The placement base (301) is provided above one side of the fixed base (1), and multiple sets of placement supports (302) are provided above the placement base (301). The internal threaded sleeve (5) is provided on the side wall of the placement support (302).

6. The self-made miniature U-shaped card device according to claim 2, characterized in that: The adjustment assembly includes an adjustment groove (401), an adjustment rod (402), and an adjustment slider (403). Two sets of adjustment grooves (401) are provided inside the other side of the fixed base (1). An adjustment rod (402) is provided inside the adjustment groove (401). An adjustment slider (403) is provided on the side wall of the adjustment rod (402). The adjustment slider (403) is slidably connected to the adjustment rod (402). The bottom wall of the arc-shaped card seat (6) is fixedly connected to the top of the adjustment slider (403).

7. The self-made miniature U-shaped card device according to claim 6, characterized in that: The adjustment assembly also includes an adjustment spring (404). Two sets of adjustment springs (404) are provided on both sides of the adjustment slider (403). One end of the adjustment spring (404) is fixedly connected to the inner wall of the adjustment groove (401), and the other end of the adjustment spring (404) is fixedly connected to the inner wall of the adjustment slider (403).

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