A module with lifting device

Abstract

This invention provides a module with a lifting device, belonging to the field of logistics sorting technology, and solves the problem of high energy consumption caused by multiple drives in existing technologies. The invention includes a base plate, on which a first movable plate and a second movable plate are provided. Both the first and second movable plates are equipped with drive wheels for driving the module belt. A first connecting component between the base plate and the first movable plate allows them to swing relative to each other. A second connecting component between the base plate and the second movable plate also allows them to swing relative to each other. A first transmission mechanism between the base plate and the first movable plate drives the first movable plate to move upward or downward. When the first movable plate moves upward or downward, it can be offset and oscillated by the action of the first connecting component. Similarly, a second transmission mechanism between the base plate and the second movable plate drives the second movable plate to move upward or downward. When the second movable plate moves upward or downward, it can be offset and oscillated by the action of the second connecting component.

Description

Technical Field

[0001] This invention belongs to the field of logistics sorting technology, and specifically relates to a module with a lifting device. Background Technology

[0002] Currently, modular belts, compared to traditional belt conveyors, are less prone to snagging and deflection, and are resistant to cutting, impact, oil, and water. They can be widely used in assembly lines, automated production, logistics transmission, and other fields, and are essential equipment for conveying items in various sectors.

[0003] The modular conveyor belt structure is generally achieved through a liftable sorting mechanism. The sorting mechanism is located below the main conveyor belt and has a module mounting plate, on which sorting ball modules are installed at an angle. When goods on the main conveyor belt need to be identified and moved to the corresponding position for turning, the lifting mechanism can drive the sorting mechanism at the corresponding position to rise, so that the top of the sorting ball on the sorting mechanism contacts the bottom of the conveying ball. This causes the conveying ball on the main conveyor belt to be subjected to a frictional force parallel to the axis of rotation, thereby achieving rotation around itself. Meanwhile, the goods move along the conveying direction perpendicular to the main conveyor belt to the side or enter the sorting conveyor belt, completing the sorting operation.

[0004] However, existing modular conveyors often require at least two drive units to drive their lifting and lowering separately, resulting in high transportation costs. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing an energy-saving module with a lifting device.

[0006] The objective of this invention can be achieved through the following technical solution: A module with a lifting device includes a base plate, on which a first movable plate and a second movable plate are provided. Both the first and second movable plates are provided with drive wheels for driving the module belt to move. A first connecting component is provided between the base plate and the first movable plate, allowing them to swing relative to each other. A second connecting component is provided between the base plate and the second movable plate, allowing them to swing relative to each other. A first transmission mechanism is provided between the base plate and the first movable plate, capable of driving the first movable plate to move upward or downward. When the first movable plate moves upward or downward, it can be deflected and swung by the action of the first connecting component. A second transmission mechanism is provided between the base plate and the second movable plate, capable of driving the second movable plate to move upward or downward. When the second movable plate moves upward or downward, it can be deflected and swung by the action of the second connecting component. The base plate is also provided with a drive device capable of simultaneously driving the first and second transmission mechanisms.

[0007] The first connecting component allows the first movable plate to swing relative to the base plate, and the second connecting component allows the second movable plate to swing relative to the base plate. The first transmission mechanism drives the first movable plate to move up or down. When the first movable plate moves up or down, it will deflect and swing due to the action of the first connecting component. Similarly, the second transmission mechanism drives the second movable plate to move up or down. When the second movable plate moves up or down, it will deflect and swing due to the action of the second connecting component. Since the first and second movable plates are driven separately by different transmission mechanisms, their movement states can be set to four modes: both move upward together, both move downward together, the former moves upward and the latter moves downward, and the former moves downward and the latter moves upward. In this way, the drive wheels on the first and second movable plates can drive the module belt to switch to different states based on their different states. Only one drive device is set up to drive the first and second transmission mechanisms to work simultaneously, which has high working efficiency, saves one drive mechanism, has low energy consumption, and reduces costs.

[0008] In the aforementioned module with lifting device, the first transmission mechanism includes a first mounting base disposed on a first movable plate, a first transmission wheel disposed on the first mounting base, and a first cam disposed below and coupled to the first transmission wheel. The second transmission mechanism includes a second mounting base disposed on a second movable plate, a second transmission wheel disposed on the second mounting base, and a second cam disposed below and coupled to the second transmission wheel. Both the first cam and the second cam are disposed on the output shaft of the drive device. When the output shaft rotates, the first transmission wheel and the first cam remain coupled, and the second transmission wheel and the second cam remain coupled.

[0009] Since both the first cam and the second cam are mounted on the output shaft of the drive device, the rotation of the output shaft can simultaneously drive the first cam and the second cam to rotate. The rotation of the first cam can drive the first transmission wheel coupled with it to rotate, and the rotation of the second cam can drive the second transmission wheel coupled with it to rotate. When rotating, since the outer circle radius of the two cams is larger than the base circle radius, the first cam will raise or lower the first transmission wheel, and the second cam will raise or lower the second transmission wheel. In this way, the first transmission wheel will drive the first mounting base and the first movable plate to move up or down, and the second transmission wheel will drive the second mounting base and the second movable plate to move up or down.

[0010] In one of the above-mentioned module-with-lifting devices, as another embodiment, the first transmission mechanism includes a first mounting base disposed on a first movable plate, a first cam disposed on the first mounting base, and a first transmission wheel disposed below and coupled to the first cam. The second transmission mechanism includes a second mounting base disposed on a second movable plate, a second cam disposed on the second mounting base, and a second transmission wheel disposed below and coupled to the second cam. Both the first transmission wheel and the second transmission wheel are disposed on the output shaft of the drive device. When the output shaft rotates, the first transmission wheel and the first cam remain coupled at all times, and the second transmission wheel and the second cam remain coupled at all times.

[0011] By swapping the positions of the first cam and the first drive wheel, and the second cam and the second drive wheel, the upward and downward movement of the first and second movable plates can also be achieved.

[0012] In the above-mentioned module with lifting device, the first cam and the second cam have the same shape and size, the first transmission wheel and the second transmission wheel have the same shape and size, and the first cam and the second cam have a circumferential rotation angle difference on the output shaft.

[0013] When the output shaft rotates, there is a difference in circumferential rotation angle between the first cam and the second cam. The difference in circumferential rotation angle depends on the size of the central angle of the eccentric circle. This ensures that the first transmission mechanism drives the first movable plate to rise and fall and the second transmission mechanism drives the second movable plate to rise and fall in sequence. During the rise and fall of the two, there are four height position states, such as the former being higher than the latter, the former being the same height as the latter, the former being lower than the latter, and the former being the same low as the latter.

[0014] In the above-mentioned module with lifting device, the first connecting component includes a plurality of first connecting shafts disposed on the base plate, a plurality of first swing arms disposed on the first connecting shafts, and a plurality of first connecting seats disposed on the first movable plate corresponding to the first swing arms. The two ends of the first swing arms are respectively hinged to the first connecting shafts and the first connecting seats.

[0015] There are at least two first connecting shafts, and each first connecting shaft is provided with at least two first swing arms. The first connecting seat corresponds one-to-one with the first swing arm to ensure that the first movable plate remains parallel to the base plate when it swings.

[0016] In the above-mentioned module with lifting device, the second connecting component includes a plurality of second connecting shafts disposed on the base plate, a plurality of second swing arms disposed on the second connecting shafts, and a plurality of second connecting seats disposed on the second movable plate corresponding to the second swing arms. The two ends of the second swing arms are respectively hinged to the second connecting shafts and the second connecting seats.

[0017] There are at least two second connecting shafts, and each second connecting shaft is equipped with at least two second swing arms. The second connecting seat corresponds one-to-one with the second swing arm to ensure that the second movable plate remains parallel to the base plate when it swings.

[0018] In the above-mentioned module with lifting device, the driving device includes a drive motor mounted on the base plate and an output shaft mounted on the drive motor, and the first transmission mechanism and the second transmission mechanism are always in contact with the output shaft.

[0019] By using the output shaft of a single drive motor to simultaneously drive the first and second transmission mechanisms, one drive motor and power consumption can be saved, thus reducing costs.

[0020] In the aforementioned modular belt lifting device, a support structure is provided on the base plate. After the drive wheel moves downward, the modular belt can abut against the support structure. The support structure can hold the modular belt as it descends, facilitating its separation from the drive wheel.

[0021] In the aforementioned module belt lifting device, the support structure includes a first support base disposed at one end of the base plate and a support plate disposed on the first support base. The first support base is used to mount the support plate, and the support plate is used to support the module belt.

[0022] In the above-mentioned module with lifting device, the support structure further includes a second support seat disposed on the base plate at one end away from the first support seat. One end of the support plate is hinged to the first support seat, and the other end abuts against the second support seat. The second support seat is provided with a locking interface, and one end of the support plate can be locked onto the locking interface.

[0023] In the working state, the support plate can rest against the second support seat. When the first movable plate and the second movable plate press the support plate upward, since the support plate and the first support seat are hinged, they are not easily worn. When maintenance is required, the support plate can be directly unfolded upward and locked with one end of the support plate using the locking interface to prevent it from loosening in the horizontal direction.

[0024] Compared with the prior art, the present invention separates the first and second movable plates by using two transmission mechanisms for transmission. Therefore, the movement states of the first and second movable plates can be divided into four modes: both moving upwards together, both moving downwards together, the former moving upwards and the latter moving downwards, and the former moving downwards and the latter moving upwards. Thus, the drive wheels on the first and second movable plates can switch the module belt to different states based on their different states. Furthermore, only one drive device is needed to simultaneously drive the first and second transmission mechanisms, resulting in high efficiency, low energy consumption, and reduced transportation costs. Multiple first swing arms, multiple first swing shafts, and multiple first connecting seats enable the first movable plate to swing parallel to the base plate. Multiple second swing arms, multiple second swing shafts, and multiple second connecting seats enable the second movable plate to swing parallel to the base plate. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the present invention after the hidden portion of the structure is shown;

[0027] Figure 3 yes Figure 2 A schematic diagram of the 3D structure after concealing some parts of the structure;

[0028] Figure 4 This is a three-dimensional structural diagram of the first cam and the second cam of the present invention;

[0029] In the diagram, 1. Base plate; 2. First movable plate; 3. Second movable plate; 4. Drive wheel; 5. First connecting assembly; 51. First connecting shaft; 52. First swing arm; 53. First connecting seat; 6. Second connecting assembly; 61. Second connecting shaft; 62. Second swing arm; 63. Second connecting seat; 7. First transmission mechanism; 71. First mounting seat; 72. First transmission wheel; 73. First cam; 8. Second transmission mechanism; 81. Second mounting seat; 82. Second transmission wheel; 83. Second cam; 9. Drive device; 91. Drive motor; 92. Output shaft; 10. Support structure; 101. First support seat; 102. Support plate; 103. Second support seat; 104. Card interface. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figure 1-4As shown, the present invention includes a base plate 1, on which a first movable plate 2 and a second movable plate 3 are provided. Both the first movable plate 2 and the second movable plate 3 are provided with drive wheels 4 for driving the module belt to move. A first connecting component 5, allowing the base plate 1 and the first movable plate 2 to swing relative to each other, is provided between the base plate 1 and the first movable plate 2. A second connecting component 6, also allowing the base plate 1 and the second movable plate 3 to swing relative to each other, is provided between the base plate 1 and the first movable plate 2. A first transmission mechanism 7, capable of driving the first movable plate 2 to move upward or downward, is provided between the base plate 1 and the first movable plate 2. When the first movable plate 2 moves upward or downward, it can be deflected and swung by the action of the first connecting component 5. A second transmission mechanism 8, capable of driving the second movable plate 3 to move upward or downward, is provided between the base plate 1 and the second movable plate 3. When the second movable plate 3 moves upward or downward, it can be deflected and swung by the action of the second connecting component 6. The base plate 1 is also provided with a drive device 9 capable of simultaneously driving the first transmission mechanism 7 and the second transmission mechanism 8.

[0032] The first connecting component 5 allows the first movable plate 2 to swing relative to the base plate 1, and the second connecting component 6 allows the second movable plate 3 to swing relative to the base plate 1. The first transmission mechanism 7 drives the first movable plate 2 to move up or down. When the first movable plate 2 moves up or down, it will deflect and swing due to the action of the first connecting component 5. Similarly, the second transmission mechanism 8 drives the second movable plate 3 to move up or down. When the second movable plate 3 moves up or down, it will deflect and swing due to the action of the second connecting component. Since the first movable plate 2 and the second movable plate 3 are driven separately by different transmission mechanisms, their activity states can be set to four modes: both move up together, both move down together, the former moves up and the latter moves down, and the former moves down and the latter moves up. In this way, the drive wheels 4 on the first movable plate 2 and the second movable plate 3 can drive the module belt to switch to different states based on their different states. Moreover, only one drive device 9 is set to drive the first transmission mechanism 7 and the second transmission mechanism 8 to work simultaneously, resulting in high working efficiency, low energy consumption, and reduced transportation costs.

[0033] The first transmission mechanism 7 includes a first mounting base 71 disposed on the first movable plate 2, a first transmission wheel 72 disposed on the first mounting base 71, and a first cam 73 disposed below and coupled to the first transmission wheel 72. The second transmission mechanism 8 includes a second mounting base 81 disposed on the second movable plate 3, a second transmission wheel 82 disposed on the second mounting base 81, and a second cam 83 disposed below and coupled to the second transmission wheel 82. The first cam 73 and the second cam 83 are both disposed on the output shaft 92 of the drive device 9. When the output shaft 92 rotates, the first transmission wheel 72 and the first cam 73 always remain coupled, and the second transmission wheel 82 and the second cam 83 always remain coupled.

[0034] Since both the first cam 73 and the second cam 83 are mounted on the output shaft 92 of the drive device 9, the rotation of the output shaft 92 can simultaneously drive the first cam 73 and the second cam 83 to rotate. The rotation of the first cam 73 can drive the first transmission wheel 72 coupled with it to rotate, and the rotation of the second cam 83 can drive the second transmission wheel 82 coupled with it to rotate. When rotating, since the outer radius of the two cams is larger than the base circle radius, the first cam 73 will raise or lower the first transmission wheel 72, and the second cam 83 will raise or lower the second transmission wheel 82. In this way, the first transmission wheel 72 will drive the first mounting base 71 and the first movable plate 2 to move up or down, and the second transmission wheel 82 will drive the second mounting base 81 and the second movable plate 3 to move up or down.

[0035] The first cam 73 and the second cam 83 are of the same shape and size, the first transmission wheel 72 and the second transmission wheel 82 are of the same shape and size, and the first cam 73 and the second cam 83 have a circumferential rotation angle difference on the output shaft 92. Figure 4 As shown, when the circumferential rotation angle difference is set to 90 degrees, the cross section of the second cam 83 can coincide with the cross section of the first cam 73 after rotating 90 degrees. The central angle of the offset circles of the first cam 73 and the second cam 83 is 90 degrees. That is, when the first cam 73 and the second cam 83 rotate a certain angle, the center distance between the two circles will be the same. The first movable plate 2 and the second movable plate 3 are also the same. At certain times, the first movable plate 2 will be higher or lower than the second movable plate 33. There are four position states between the two, such as the first movable plate 2 being higher than the second movable plate 3, the first movable plate 2 and the second movable plate 3 being at the same high position, the first movable plate 2 being lower than the second movable plate 3 being higher, and the first movable plate 2 and the second movable plate 3 being at the same low position.

[0036] The first connecting component 5 includes a plurality of first connecting shafts 51 disposed on the base plate 1, a plurality of first swing arms 52 disposed on the first connecting shafts 51, and a plurality of first connecting seats 53 disposed on the first movable plate 2 corresponding to the first swing arms 52. The two ends of the first swing arms 52 are respectively hinged to the first connecting shafts 51 and the first connecting seats 53.

[0037] There are at least two first connecting shafts 51, and each first connecting shaft 51 is provided with at least two first swing arms 52. The first connecting seat 53 corresponds one-to-one with the first swing arm 52 to ensure that the first movable plate 2 remains parallel to the base plate 1 when it swings.

[0038] The second connecting assembly 6 includes a plurality of second connecting shafts 61 disposed on the base plate 1, a plurality of second swing arms 62 disposed on the second connecting shafts 61, and a plurality of second connecting seats 63 disposed on the second movable plate 3 corresponding to the second swing arms 62. The two ends of the second swing arms 62 are respectively hinged to the second connecting shafts 61 and the second connecting seats 63.

[0039] There are at least two second connecting shafts 61, and at least two second swing arms 62 are provided on each second connecting shaft 61. The second connecting seat 63 corresponds one-to-one with the second swing arm 62 to ensure that the second movable plate 3 remains parallel to the base plate 1 when it swings.

[0040] The drive device 9 includes a drive motor 91 mounted on the base plate 1 and an output shaft 92 mounted on the drive motor 91. The first transmission mechanism 7 and the second transmission mechanism 8 are always in contact with the output shaft 92. Using the output shaft 92 of the drive motor 91 to simultaneously drive the first transmission mechanism 7 and the second transmission mechanism 8 can save electricity and reduce costs.

[0041] The base plate 1 is provided with a support structure 10. After the drive wheel 4 moves downward, the module belt can abut against the support structure 10. After the module belt descends, it can be supported by the support structure 10, which facilitates its separation from the drive wheel 4.

[0042] The support structure 10 includes a first support base 101 disposed at one end of the base plate 1 and a support plate 102 disposed on the first support base 101. The first support base 101 is used to install the support plate 102, and the support plate 102 is used to support the module belt.

[0043] The support structure 10 further includes a second support 103 disposed on the base plate 1 at one end away from the first support 101. One end of the support plate 102 is hinged to the first support 101, and the other end abuts against the second support 103. The second support 103 is provided with a locking interface 104, and one end of the support plate 102 can be locked onto the locking interface 104.

[0044] In the working state, the support plate 102 can abut against the second support seat 103. When the first movable plate 2 and the second movable plate 3 press the support plate 102 upward, since the support plate 102 and the first support seat 101 are hinged, they are not easily worn. When maintenance is required, the support plate 102 can be directly unfolded upward and the locking interface 104 can be used to lock one end of the support plate 102 to prevent it from loosening in the horizontal direction.

[0045] The working principle of this invention is as follows: The drive motor 91 drives the output shaft 92 to rotate. The rotation of the output shaft 92 simultaneously drives the first cam 73 and the second cam 83 to rotate. The first cam 73 drives the first transmission wheel 72 to move, and the second cam 83 drives the second transmission wheel 82 to move. Since the initial center distance between the first cam 73 and the first transmission wheel 72 is different from the initial center distance between the second cam 83 and the second transmission wheel 82, the center distance can change with the rotation of the output shaft 92. Therefore, the first movable plate 2 and the second movable plate 3 are level when the center distances of the two transmission mechanisms are equal. When the center distances of the two transmission mechanisms are not equal, the first movable plate 2 is higher or lower than the second movable plate 3. The rotation angle is controlled by the output shaft 92, which indirectly controls the size of the center distance, thereby realizing the lifting and sorting of the module belt.

[0046] This invention separates the first movable plate 2 and the second movable plate 3 into two transmission mechanisms, thus allowing the movement of the first movable plate 2 and the second movable plate 3 to be divided into four modes: both moving upwards together, both moving downwards together, the former moving upwards and the latter moving downwards, and the former moving downwards and the latter moving upwards. In this way, the drive wheels 4 on the first movable plate 2 and the second movable plate 3 can drive the module belt to switch between different states based on their different states. Furthermore, only one drive device 9 is needed to simultaneously drive the first transmission mechanism 7 and the second transmission mechanism 8, resulting in high efficiency, low energy consumption, and reduced transportation costs. By setting multiple first swing arms 52, multiple first swing shafts, and multiple first connecting seats 53, the first movable plate 2 can swing parallel to the base plate 1. Similarly, by setting multiple second swing arms 62, multiple second swing shafts, and multiple second connecting seats 63, the second movable plate 3 can swing parallel to the base plate 1.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A module with a lifting device, comprising a base plate (1), characterized in that: The base plate (1) is provided with a first movable plate (2) and a second movable plate (3). Both the first movable plate (2) and the second movable plate (3) are provided with drive wheels (4) for driving the module to move. A first connecting component (5) is provided between the base plate (1) and the first movable plate (2) to allow them to swing relative to each other. A second connecting component (6) is provided between the base plate (1) and the second movable plate (3) to allow them to swing relative to each other. A component is provided between the base plate (1) and the first movable plate (2) to drive the first movable plate (2) to move upward or downward. The first transmission mechanism (7) is movable. When the first movable plate (2) moves up or down, it can be deflected and swung by the action of the first connecting component (5). A second transmission mechanism (8) is provided between the base plate (1) and the second movable plate (3) to drive the second movable plate (3) to move up or down. When the second movable plate (3) moves up or down, it can be deflected and swung by the action of the second connecting component (6). A driving device (9) is also provided on the base plate (1) to drive the first transmission mechanism (7) and the second transmission mechanism (8) to work simultaneously. The first connecting assembly (5) includes a plurality of first connecting shafts (51) disposed on the base plate (1), a plurality of first swing arms (52) disposed on the first connecting shafts (51), and a plurality of first connecting seats (53) disposed on the first movable plate (2) corresponding to the first swing arms (52) respectively. The two ends of the first swing arms (52) are respectively hinged to the first connecting shafts (51) and the first connecting seats (53). The second connecting assembly (6) includes a plurality of second connecting shafts (61) disposed on the base plate (1), a plurality of second swing arms (62) disposed on the second connecting shafts (61), and a plurality of second connecting seats (63) disposed on the second movable plate (3) corresponding to the second swing arms (62). The two ends of the second swing arms (62) are respectively hinged to the second connecting shafts (61) and the second connecting seats (63).

2. A module with a lifting device according to claim 1, characterized in that: The first transmission mechanism (7) includes a first mounting base (71) disposed on the first movable plate (2), a first transmission wheel (72) disposed on the first mounting base (71), and a first cam (73) disposed below and coupled to the first transmission wheel (72). The second transmission mechanism (8) includes a second mounting base (81) disposed on the second movable plate (3), a second transmission wheel (82) disposed on the second mounting base (81), and a second cam (83) disposed below and coupled to the second transmission wheel (82). The first cam (73) and the second cam (83) are both disposed on the output shaft (92) of the drive device (9). When the output shaft (92) rotates, the first transmission wheel (72) and the first cam (73) always remain coupled, and the second transmission wheel (82) and the second cam (83) always remain coupled.

3. A module with a lifting device according to claim 1, characterized in that: The first transmission mechanism (7) includes a first mounting base (71) disposed on the first movable plate (2), a first cam (73) disposed on the first mounting base (71), and a first transmission wheel (72) disposed below the first cam (73) and coupled thereto. The second transmission mechanism (8) includes a second mounting base (81) disposed on the second movable plate (3), a second cam (83) disposed on the second mounting base (81), and a second transmission wheel (82) disposed below the second cam (83) and coupled thereto. The first transmission wheel (72) and the second transmission wheel (82) are both disposed on the output shaft (92) of the drive device (9). When the output shaft (92) rotates, the first transmission wheel (72) and the first cam (73) always remain coupled, and the second transmission wheel (82) and the second cam (83) always remain coupled.

4. A module with a lifting device according to claim 2 or 3, characterized in that: The first cam (73) and the second cam (83) have the same shape and size, the first transmission wheel (72) and the second transmission wheel (82) have the same shape and size, and the first cam (73) and the second cam (83) have a circumferential rotation angle difference on the output shaft (92).

5. A module with a lifting device according to claim 1, 2, or 3, characterized in that: The drive device (9) includes a drive motor (91) mounted on the base plate (1) and an output shaft (92) mounted on the drive motor (91). The first transmission mechanism (7) and the second transmission mechanism (8) are always in contact with the output shaft (92).

6. A module with a lifting device according to claim 1, 2, or 3, characterized in that: The base plate (1) is provided with a support structure (10), and after the drive wheel (4) moves downward, the module belt can abut against the support structure (10).

7. A module with a lifting device according to claim 6, characterized in that: The support structure (10) includes a first support base (101) disposed at one end of the base plate (1) and a support plate (102) disposed on the first support base (101).

8. A module with a lifting device according to claim 7, characterized in that: The support structure (10) further includes a second support (103) disposed on the base plate (1) at one end away from the first support (101). One end of the support plate (102) is hinged to the first support (101), and the other end abuts against the second support (103). The second support (103) is provided with a card interface (104), and one end of the support plate (102) can be snapped onto the card interface (104).

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