Machining center reset motor machining device

Abstract

The invention discloses a machining center reset motor machining device which comprises a mounting disc, a machining device body is arranged on the mounting disc, a moving unit is arranged at the bottom of the mounting disc, the moving unit is fixedly connected with the mounting disc, the machining device body comprises a rotating unit and a clamping unit, the clamping unit is mounted on the rotating unit, and the rotating unit comprises a center rotating shaft. A semi-arc block is arranged on the central rotating shaft, a rotating mounting block is arranged on the semi-arc block, a fixing block is arranged on the rotating mounting block, a circular groove is formed in the fixing block, a rotating rod is arranged at the circular groove, and a connecting piece is arranged at one end of the rotating rod. According to the machining center reset motor machining device, the clamping unit is arranged, so that the whole device can clamp and fix some reset motors with shells selected to be cambered surfaces or cylinders, and the situation that the cambered surfaces of the reset motor shells are too smooth, so that the reset motors fall off or are unstable in the machining process is avoided; and the machining accuracy and stability of the reset motor are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of reset motor processing technology, specifically to a reset motor processing device for a machining center. Background Technology

[0002] A machining center, also known as a CNC milling machine, is an automated machining equipment developed from a general milling machine. The two have basically the same machining process and some similar structures. Machining centers are characterized by good flexibility, high machining accuracy, stable and reliable machining quality, high degree of automation, and high production efficiency. For example, a machining center can be used to process a reset motor.

[0003] Current machining centers can perform machining operations, but it is inconvenient to adjust the machining position, which reduces machining efficiency and also does not provide good fixation for the workpiece, making machining errors more likely.

[0004] For example, the machining center reset motor processing device disclosed in Chinese Patent Publication No. CN217596526U can drive the first helical gear to rotate through other components. The first helical gear drives the first screw to rotate, so that the first screw drives the second vertical plate to move through the crossbar. The second vertical plate drives the parts to move through the first horizontal plate, etc. This facilitates the adjustment of the position of the parts. The first handle drives the second screw to rotate, and the second screw drives the baffle to move through the sleeve. The baffle cooperates with the first horizontal plate to fix the parts, thereby improving the machining accuracy of the parts.

[0005] The existing technology has the following problems: The processing device mainly uses the threaded connection between the screw and the vertical plate. When the screw rotates, the vertical plate moves, which allows the reset motor to shift left and right during the processing, making the processing of parts more convenient. However, the existing reset motors are often made with curved surfaces for the housing, and it is difficult to fix the curved reset motor with just a baffle. Summary of the Invention

[0006] The purpose of this invention is to provide a machining center reset motor machining device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a machining center reset motor machining device, comprising a mounting disk, a machining device mounted on the mounting disk, a moving unit at the bottom of the mounting disk, the moving unit being fixedly connected to the mounting disk, the machining device comprising a rotating unit and a clamping unit, the clamping unit being mounted on the rotating unit. The moving unit is provided to enable the entire machining device to move during machining, thereby improving the convenience and accuracy of machining. Furthermore, the rotating unit causes the clamping unit to rotate, and the clamping unit fixes the reset motor; therefore, this is the significance of mounting the clamping unit on the rotating unit. The rotating unit includes a center... The rotating shaft has a semi-circular block on its center, a rotating mounting block on the semi-circular block, and a fixed block on the rotating mounting block. A circular groove is formed within the fixed block, and a rotating rod is positioned within the groove. One end of the rotating rod has a connector, and the other end has an arc-shaped sleeve. A slot is located on one side of the arc-shaped sleeve, and a locking block is located within the arc-shaped sleeve. By setting the center rotating shaft, the semi-circular block can rotate on the mounting disc, thereby changing the position of the fixed block and other components. The circular groove is designed to prevent the rotating rod from affecting the stability of the fixed block during rotation. Since the rotating rod is located within the fixed block, it also receives stable support.

[0008] According to the above technical solution, the central rotating shaft is rotatably connected to the mounting disc, the central rotating shaft is fixedly connected to the semi-circular block, the semi-circular block is fixedly connected to the rotating mounting block, the rotating mounting block is fixedly connected to the fixed block, the fixed block is rotatably connected to the rotating rod through a circular groove, the rotating rod is fixedly connected to the connecting piece, the connecting piece is connected to the arc-shaped sleeve through an insertion slot, and the snap-fit ​​block snaps into the arc-shaped sleeve. In particular, connecting the connecting piece and the arc-shaped sleeve together through the slot makes disassembly and assembly more convenient in the later stages.

[0009] According to the above technical solution, the rotating mounting block, fixing block, rotating rod, connecting piece, arc sleeve, and snap-fit ​​block are all in two sets. The other rotating mounting block is fixedly mounted on the mounting disc. The two snap-fit ​​blocks have a limiting groove at the end away from the connecting piece, and a limiting ring is provided in the two limiting grooves. The limiting rings are fixedly connected to the two snap-fit ​​blocks through the limiting grooves. The two snap-fit ​​blocks are provided with a clamping unit. The purpose of setting the limiting ring is to connect the two arc sleeves into one unit, so that the two arc sleeves can rotate simultaneously during rotation. After the rotating rod rotates, the connecting piece starts to rotate because of the fixed connection. At this time, the arc sleeve starts to rotate with the connecting piece, so the snap-fit ​​block rotates, and finally realizes the rotation of the reset motor in the clamping unit. Since one rotating mounting block is mounted on the semi-arc block, before the clamping unit is installed on the snap-fit ​​block, rotating the semi-arc block causes the parts on one rotating mounting block to shift at an angle. At this time, after rotating the rotating rod, the rotation angle of the snap-fit ​​block will also change.

[0010] According to the above technical solution, the clamping unit includes a mounting base, a vertical plate on the mounting base, a clamping mounting block on one side of the vertical plate, a fitting block on the clamping mounting block, a clamping plate on the fitting block, a positioning groove on one side of the clamping plate, and a positioning block at the positioning groove.

[0011] According to the above technical solution, the mounting base is located on top of the two snap-fit ​​blocks, the mounting base is connected to the two snap-fit ​​blocks, the mounting base is fixedly connected to the vertical plate, and the vertical plate is fixedly connected to the clamping mounting block by fasteners. The fastener connection method allows the vertical plate and the clamping mounting block to be quickly installed and removed before and after installation. The clamping mounting block is fixedly connected to the fitting block, the fitting block is fitted into the clamping plate, and the fitting block is slidably connected to the clamping plate. The fitting block is fixedly connected to the positioning block, and the positioning block is slidably connected to the positioning groove. The purpose of setting the positioning block is to prevent the clamping plate from descending or rising excessively, which would cause the reset motor to be clamped too tightly and damaged. Therefore, the positioning block is placed in the positioning groove.

[0012] According to the above technical solution, the top end of the clamping plate is provided with an arc-shaped edge, the bottom end of the clamping plate is provided with a threaded rod, and the bottom of the clamping plate is provided with an external thread. The clamping plate is threadedly connected to the threaded rod through the external thread. The reason for providing the arc-shaped edge is to enable the clamping plate to clamp some reset motors with arc-shaped or cylindrical housings. By rotating the threaded rod, the clamping plate moves on the threaded rod due to the threaded connection. Because the middle part of the clamping plate is fitted into the fitting block, the top end of the clamping plate begins to rotate inward during the rotation of the threaded rod. At this time, the clamping plate begins to move downward, thereby clamping and tightening the reset motor.

[0013] According to the above technical solution, arc-shaped mounting blocks are provided at both ends of the vertical plate, a clamping rotating shaft is provided inside the arc-shaped mounting block, a connecting rod is sleeved on the outer wall of the clamping rotating shaft, and a placement plate is provided at the other end of the connecting rod.

[0014] According to the above technical solution, the vertical plate is fixedly connected to the arc-shaped mounting block, the arc-shaped mounting block is rotatably connected to the clamping rotating shaft, the clamping rotating shaft is fixedly connected to the connecting rod, and the connecting rod is fixedly connected to the placement plate. By rotating the clamping rotating shaft, the direction of the connecting rod is changed, thereby changing the angle of the placement plate, and then supporting the reset motor on the vertical plate. At this time, in conjunction with the clamping plate mentioned above, reset motors of different thicknesses, sizes and models can be stably fixed and clamped.

[0015] According to the above technical solution, the moving unit includes a sliding seat, a sliding groove is provided in the sliding seat, a sliding block is provided at the sliding groove, the sliding block is slidably connected to the sliding seat through the sliding groove, the mounting disk is fixedly installed on the sliding block, and the bottom ends of the sliding seat are respectively provided with moving blocks, the moving blocks are located in a card holder, and the moving blocks are slidably connected to the card holder. The sliding of the sliding block causes the processing device on the mounting disk to move along the x-axis, and because of the moving blocks, the moving blocks are pushed to cause the processing device on the mounting disk to move along the y-axis.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. This invention, by providing a clamping unit, enables the overall device to clamp and fix reset motors whose housings are made of curved or cylindrical surfaces, thereby avoiding the occurrence of falling or instability during processing due to the excessive smoothness of the curved surface of the reset motor housing, and greatly improving the accuracy and stability of reset motor processing.

[0017] 2. The present invention, by setting a rotating unit, enables the reset motor to offset at a certain angle during the processing, thereby cooperating with other processing devices to process various positions of the reset motor and avoid the occurrence of situations where it cannot be processed or processing dead angles.

[0018] 3. The present invention, by providing a moving unit, enables the overall device to conveniently adjust the position of the reset motor, thereby facilitating the improvement of machining accuracy during the processing of the reset motor.

[0019] 4. The present invention, by providing a clamping unit, enables the overall device to process reset motors of different models, sizes and thicknesses, thereby greatly improving the practicality and applicability of the overall device. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall front view of the present invention; Figure 3 This is an enlarged three-dimensional structural schematic diagram of the rotating unit of the present invention; Figure 4 This is an enlarged three-dimensional structural schematic diagram of the clamping unit of the present invention; Figure 5 This is an enlarged three-dimensional structural schematic diagram of the moving unit of the present invention; Figure 6 This is a front view of the rotating unit of the present invention.

[0021] In the diagram: 1. Mounting disc; 201. Central rotating shaft; 202. Semi-arc block; 203. Rotating mounting block; 204. Fixing block; 205. Rotating rod; 206. Connecting piece; 207. Arc-shaped sleeve; 208. Snap-fit ​​block; 209. Limiting ring; 301. Mounting base; 302. Vertical plate; 303. Clamping mounting block; 304. Fitting block; 305. Clamping plate; 306. Positioning groove; 307. Positioning block; 308. Threaded rod; 309. Arc-shaped mounting block; 310. Clamping rotating shaft; 311. Connecting rod; 312. Placement plate; 401. Sliding seat; 402. Sliding block; 403. Moving locking block; 404. Locking seat. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-6 The present invention provides the following technical solution: Example 1:

[0024] A machining center reset motor machining device includes a mounting disk 1, on which a machining device is mounted. A moving unit is located at the bottom of the mounting disk 1 and is fixedly connected to the mounting disk 1. The machining device includes a rotating unit and a clamping unit, with the clamping unit mounted on the rotating unit. The moving unit is provided to enable the entire machining device to move during machining, thereby improving machining convenience and accuracy. The rotating unit causes the clamping unit to rotate, and the clamping unit fixes the reset motor in place. Therefore, this device mounts the clamping unit onto the mounting disk 1. The significance of the rotating unit lies in the fact that it includes a central rotating shaft 201, a semi-circular block 202 mounted on the central rotating shaft 201, a rotating mounting block 203 mounted on the semi-circular block 202, and a fixing block 204 mounted on the rotating mounting block 203. A circular groove is formed within the fixing block 204, and a rotating rod 205 is positioned within the groove. One end of the rotating rod 205 has a connecting piece 206, and the other end has an arc-shaped sleeve 207. The arc-shaped sleeve 207 has a slot on one side of the connecting piece 206, and a locking block 208 is located within the arc-shaped sleeve 207. By setting the central rotating shaft 201, the semi-circular block 202 can rotate on the mounting disc 1, thereby changing the position of the fixing block 204 and other components. The circular groove is designed to prevent the rotating rod 205 from affecting the stability of the fixing block 204 during rotation. Since the rotating rod 205 is located within the fixing block 204, it also receives stable support.

[0025] The central rotating shaft 201 is rotatably connected to the mounting disc 1. The central rotating shaft 201 is fixedly connected to the semi-arc block 202. The semi-arc block 202 is fixedly connected to the rotating mounting block 203. The rotating mounting block 203 is fixedly connected to the fixing block 204. The fixing block 204 is rotatably connected to the rotating rod 205 through a circular groove. The rotating rod 205 is fixedly connected to the connector 206. The connector 206 is connected to the arc-shaped sleeve 207 through an insertion slot. The snap-fit ​​block 208 snaps into the arc-shaped sleeve 207. In particular, connecting the connector 206 and the arc-shaped sleeve 207 together through the slot makes disassembly and assembly more convenient in the later stages.

[0026] The rotating mounting block 203, the fixed block 204, the rotating rod 205, the connecting piece 206, the arc sleeve 207, and the snap-fit ​​block 208 are all in two sets. The other rotating mounting block 203 is fixedly installed on the mounting disc 1. The two snap-fit ​​blocks 208 have a limiting groove at the end away from the connecting piece 206. The two limiting grooves have a limiting ring 209. The limiting ring 209 is fixedly connected to the two snap-fit ​​blocks 208 through the limiting groove. The two snap-fit ​​blocks 208 are equipped with clamping units. The purpose of setting the limiting ring 209 is to connect the two arc-shaped sleeves 207 into one unit, so that the two arc-shaped sleeves 207 can rotate simultaneously during rotation. After the rotating rod 205 rotates, the connecting piece 206 starts to rotate because of the fixed connection. At this time, the arc-shaped sleeves 207 start to rotate with the connecting piece 206, thereby rotating the locking block 208, and finally realizing the rotation of the reset motor in the clamping unit. Since one rotating mounting block 203 is installed on the semi-arc block 202, before the clamping unit is installed on the locking block 208, by rotating the semi-arc block 202, the components on the rotating mounting block 203 will shift at an angle. At this time, after rotating the rotating rod 205, the rotation angle of the locking block 208 will also change.

[0027] Working principle: After the rotating rod 205 rotates, the connecting piece 206 starts to rotate due to the fixed connection. At this time, the arc-shaped sleeve 207 starts to rotate along with the connecting piece 206, thereby rotating the locking block 208. Finally, the reset motor in the clamping unit is rotated. Since a rotating mounting block 203 is mounted on the semi-arc block 202, before the clamping unit is installed on the locking block 208, rotating the semi-arc block 202 causes the parts on the rotating mounting block 203 to shift at an angle. After rotating the rotating rod 205, the rotation angle of the locking block 208 will also change. After the clamping unit is installed, the rotation angle of the clamping unit will change. Example 2:

[0028] Based on Embodiment 1: The clamping unit includes a mounting base 301, a vertical plate 302 on the mounting base 301, a clamping mounting block 303 on one side of the vertical plate 302, a fitting block 304 on the clamping mounting block 303, a clamping plate 305 on the fitting block 304, a positioning groove 306 on one side of the clamping plate 305, and a positioning block 307 at the positioning groove 306. The mounting base 301 is located at the top of two snap-fit ​​blocks 208, and the mounting base 301 is connected to the two snap-fit ​​blocks 208. The mounting base 301 is connected to the vertical plate 302. The vertical plate 302 is fixedly connected to the clamping mounting block 303 via fasteners. This fastener connection allows for quick assembly and disassembly of the vertical plate 302 and clamping mounting block 303 before and after installation. The clamping mounting block 303 is fixedly connected to the fitting block 304, which is fitted into the clamping plate 305 and slidably connected to it. The fitting block 304 is also fixedly connected to the positioning block 307, which slidably connects to the positioning groove 306. The purpose of the positioning block 307 is to prevent the reset motor from being excessively clamped and damaged due to excessive descent or ascent of the clamping plate 305. Therefore, the positioning block 307 is placed in the positioning groove 306. The clamping plate 305 has an arc-shaped edge at its top and a threaded rod 308 at its bottom. The clamping plate 305 has an external thread at its bottom, and is threadedly connected to the threaded rod 308 via the external thread. Specifically, the arc-shaped edge allows the clamping plate 305 to hold reset motors with curved or cylindrical housings. By rotating the threaded rod 308, the clamping plate 305 moves along the threaded rod 308. Because the middle of the clamping plate 305 is engaged with the fitting block 304, the top of the clamping plate 305 begins to rotate inward as the threaded rod 308 rotates. At this point, the clamping plate 305 begins to move downward, thus clamping and securing the reset motor. The vertical plate 302 has arc-shaped mounting blocks 309 at both ends. A clamping rotating shaft 310 is located within each arc-shaped mounting block 309. A connecting rod 311 is fitted onto the outer wall of the clamping rotating shaft 310, and a placement plate 312 is located at the other end of the connecting rod 311. The vertical plate 302 is fixedly connected to the arc-shaped mounting blocks 309, the arc-shaped mounting blocks 309 are rotatably connected to the clamping rotating shaft 310, the clamping rotating shaft 310 is fixedly connected to the connecting rod 311, and the connecting rod 311 is fixedly connected to the placement plate 312. Specifically, rotating the clamping rotating shaft 310 changes the direction of the connecting rod 311, thereby changing the angle of the placement plate 312, which in turn supports the reset motor on the vertical plate 302. In conjunction with the aforementioned clamping plate 305, reset motors of different thicknesses, sizes, and models can be stably and securely clamped.

[0029] Working principle: By rotating the clamping shaft 310, the direction of the connecting rod 311 is changed, thereby changing the angle of the placement plate 312, which in turn supports the reset motor on the vertical plate 302. By rotating the threaded rod 308, the clamping plate 305 moves on the threaded rod 308 due to the threaded connection. Since the middle of the clamping plate 305 is fitted into the fitting block 304, the top of the clamping plate 305 begins to rotate inward during the rotation of the threaded rod 308. At this time, the clamping plate 305 begins to move downward, thereby clamping and securing the reset motor. Example 3:

[0030] Based on Embodiments 1 and 2: the moving unit includes a sliding seat 401, which has a groove. A sliding block 402 is provided in the groove, and the sliding block 402 is slidably connected to the sliding seat 401 through the groove. The mounting disk 1 is fixedly mounted on the sliding block 402. Movable locking blocks 403 are provided at both ends of the bottom of the sliding seat 401, and the movable locking blocks 403 are located in a locking seat 404, which is slidably connected to the locking seat 404. Specifically, the sliding of the sliding block 402 causes the processing device on the mounting disk 1 to move along the x-axis, and the movable locking block 403, in turn, pushes the movable locking block 403 to cause the processing device on the mounting disk 1 to move along the y-axis.

[0031] 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 process, method, article, or apparatus.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A machining center reset motor machining device, comprising a mounting disc (1), characterized in that: The mounting disc (1) is provided with a processing device, and the bottom of the mounting disc (1) is provided with a moving unit. The moving unit is fixedly connected to the mounting disc (1). The processing device includes a rotating unit and a clamping unit, and the clamping unit is mounted on the rotating unit. The rotating unit includes a central rotating shaft (201), a semi-arc block (202) on the central rotating shaft (201), a rotating mounting block (203) on the semi-arc block (202), a fixing block (204) on the rotating mounting block (203), a circular groove in the fixing block (204), a rotating rod (205) in the circular groove, a connector (206) at one end of the rotating rod (205), an arc-shaped sleeve (207) at the other end of the connector (206), a slot on one side of the arc-shaped sleeve (207), and a snap-fit ​​block (208) inside the arc-shaped sleeve (207).

2. The machining center reset motor processing device according to claim 1, characterized in that: The central rotating shaft (201) is rotatably connected to the mounting disk (1), the central rotating shaft (201) is fixedly connected to the semi-arc block (202), the semi-arc block (202) is fixedly connected to the rotating mounting block (203), the rotating mounting block (203) is fixedly connected to the fixing block (204), the fixing block (204) is rotatably connected to the rotating rod (205) through a circular groove, the rotating rod (205) is fixedly connected to the connector (206), the connector (206) is connected to the arc sleeve (207) through an insertion slot, and the snap-fit ​​block (208) is snapped into the arc sleeve (207).

3. The machining center reset motor machining device according to claim 2, characterized in that: The rotating mounting block (203), the fixing block (204), the rotating rod (205), the connector (206), the arc sleeve (207), and the snap-fit ​​block (208) are all in two sets. The other rotating mounting block (203) is fixedly mounted on the mounting disc (1). The two snap-fit ​​blocks (208) have a limiting groove at one end away from the connector (206). The two limiting grooves have a limiting ring (209). The limiting ring (209) is fixedly connected to the two snap-fit ​​blocks (208) through the limiting grooves. The two snap-fit ​​blocks (208) are provided with clamping units.

4. The machining center reset motor processing device according to claim 3, characterized in that: The clamping unit includes a mounting base (301), a vertical plate (302) is provided on the mounting base (301), a clamping mounting block (303) is provided on one side of the vertical plate (302), a fitting block (304) is provided on the clamping mounting block (303), a clamping plate (305) is provided on the fitting block (304), a positioning groove (306) is provided on one side of the clamping plate (305), and a positioning block (307) is provided at the positioning groove (306).

5. A machining center resetting motor machining device according to claim 4, characterized in that: The mounting base (301) is located on top of the two snap-fit ​​blocks (208). The mounting base (301) is connected to the two snap-fit ​​blocks (208). The mounting base (301) is fixedly connected to the vertical plate (302). The vertical plate (302) is fixedly connected to the clamping mounting block (303) by fasteners. The clamping mounting block (303) is fixedly connected to the fitting block (304). The fitting block (304) is fitted into the clamping plate (305) and is slidably connected to the clamping plate (305). The fitting block (304) is fixedly connected to the positioning block (307). The positioning block (307) is slidably connected to the positioning groove.

6. The machining center reset motor machining device according to claim 5, characterized in that: The clamping plate (305) has an arc-shaped edge at the top end and a threaded rod (308) at the bottom. The clamping plate (305) has an external thread at the bottom and is threaded to the threaded rod (308) through the external thread.

7. A machining center resetting motor machining device according to claim 6, characterized in that: The vertical plate (302) has arc-shaped mounting blocks (309) at both ends. The arc-shaped mounting blocks (309) have a clamping rotating shaft (310) inside. A connecting rod (311) is sleeved on the outer wall of the clamping rotating shaft (310). The other end of the connecting rod (311) has a placement plate (312).

8. A machining center reset motor processing device according to claim 7, characterized in that: The vertical plate (302) is fixedly connected to the arc-shaped mounting block (309), the arc-shaped mounting block (309) is rotatably connected to the clamping rotating shaft (310), the clamping rotating shaft (310) is fixedly connected to the connecting rod (311), and the connecting rod (311) is fixedly connected to the placement plate (312).

9. A machining center resetting motor machining device according to claim 1, characterized in that: The moving unit includes a sliding seat (401), a sliding groove is provided in the sliding seat (401), a sliding block (402) is provided at the sliding groove, the sliding block (402) is slidably connected to the sliding seat (401) through the sliding groove, the mounting disc (1) is fixedly installed on the sliding block (402), and the bottom ends of the sliding seat (401) are respectively provided with moving blocks (403), the moving blocks (403) are located in a card holder (404), and the moving blocks (403) are slidably connected to the card holder (404).

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