Intelligent self-service material shelf for economic management

Abstract

The invention discloses an intelligent self-service material shelf for economic management, and relates to the technical field of material storage racks, the intelligent self-service material shelf comprises a box body, one side of the box body is provided with a plurality of holes distributed at equal intervals; and the two first supports are arranged at the positions, located on the two sides of the open hole, of the inner wall of the box body, a second support is fixed to the position, close to the lower portion of the open hole, of the inner wall of the box body, and first through holes are formed in one sides of the two first supports correspondingly. When the containing box is pulled out, the connecting rod slowly ascends along the second through hole, then the connecting rod needs to slide upwards along the first through hole, on the contrary, the connecting rod is limited to ascend along the first through hole through the limiting assembly, the containing box can be prevented from being pulled out, and then the safety performance of materials is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of material storage racks, and in particular to an intelligent self-service material rack for economic management. Background Art

[0002] Economic management vouchers are various written materials recording economic transactions. Due to the large number of such vouchers, in order to facilitate economic management personnel to quickly access materials and also to ensure the safety of materials, an intelligent self-service material rack for economic management is required.

[0003] Chinese invention patent application with publication number CN112932089A discloses an economic management self-service material rack, including a material rack main body, a touch display screen and a placement board. Support columns are installed at the bottom of the material rack main body, and a plurality of placement boards are installed inside the material rack main body. A moisture-proof layer is arranged inside the placement board, a drying layer is arranged on one side of the moisture-proof layer, and a gravity sensing layer is arranged on one side of the antibacterial layer. In the present invention, materials are placed on the placement board, and a drying layer, a load-bearing layer, an antibacterial layer and a gravity sensing layer are arranged inside the placement board.

[0004] In this technical solution, the following deficiencies exist:

[0005] In this technical solution, when taking out materials that do not conform to the record, only alarm processing is carried out through the alarm module, and the taking out of materials cannot be restricted, resulting in the inability to effectively ensure the safety of materials when using this kind of material rack for storage. Summary of the Invention

[0006] The purpose of the present invention is to provide an intelligent self-service material rack for economic management to solve the technical problem that the safety of materials cannot be guaranteed in the prior art.

[0007] The present invention provides an intelligent self-service material rack for economic management, including:

[0008] A box body, on one side of which a plurality of equally spaced openings are provided;

[0009] Two first brackets are arranged on the inner wall of the box body at both sides of the opening. A second bracket is fixed at the position close to the lower part of the opening on the inner wall of the box body. First through holes are provided on one side of both first brackets;

[0010] A placement box is slidably arranged on the two first brackets and the second bracket. The placement box is used for storing economic management materials. The bottom of the placement box is a porous structure. Second through holes are provided on both sides of the placement box, and both second through holes are arc-shaped structures showing an upward trend. A connecting plate is fixed on one side of the placement box;

[0011] Connecting rod, the connecting rod is slidably arranged in two second through holes, and the connecting rod penetrates through two first through holes. A pressing block is fixed at the bottom of the connecting rod, and the pressing block is used to compact the economic management materials in the placement box;

[0012] Limiting component, the limiting component is arranged on one of the first brackets, and the limiting component is used to limit the up and down sliding of the connecting rod along the first through hole;

[0013] Management component, the management component is arranged on one side of the box body, and the management component is used to control the operation of the limiting component.

[0014] Preferably, it further includes a air supply component and a drying component. The air supply component and the drying component are both arranged on one side of the box body. The air supply component is used to circulate the gas inside the box body, and the air supply component and the drying component are communicated to dry the gas inside the box body.

[0015] Preferably, the limiting component includes:

[0016] Rectangular hole, the rectangular hole is opened on one of the first brackets;

[0017] Electromagnet, the electromagnet is arranged on one side inside the rectangular hole. A spring is arranged on one side of the electromagnet, and a slider is slidably connected inside the rectangular hole;

[0018] Link rod, both ends of the link rod are rotatably connected to the connecting rod and the slider respectively;

[0019] Fixing component, the fixing component is slidably arranged on one side of the placement box, and the fixing component is used to fix the placement box so that the placement box cannot be easily pulled out of the box body.

[0020] Preferably, it further includes a guide rod. The guide rod is arranged inside the rectangular hole, and the slider is slidably arranged on the guide rod.

[0021] Preferably, the fixing component includes:

[0022] Limiting rod, the limiting rod is arranged on the connecting rod and penetrates through the bottom of the first bracket;

[0023] Chute, the chute is opened on one side of the placement box,

[0024] Limiting block, the limiting block is slidably arranged in the chute, and a limiting hole is opened at the top of the limiting block for the limiting rod to pass through.

[0025] Preferably, a groove is opened on one side of the slider, a pressure sensor is fixed in the groove, and the pressure sensor is fixed to the spring.

[0026] Preferably, the management component includes:

[0027] An instrument, the instrument is arranged on one side of the box body;

[0028] A radio frequency inductor, the radio frequency inductor is arranged on one side of the instrument, the radio frequency inductor and the pressure sensor are connected to the same controller through signal lines, and the controller is electrically connected to the electromagnet;

[0029] An alarm module, the alarm module is arranged inside the box body, and the alarm module is electrically connected to the controller.

[0030] Preferably, the air supply assembly includes:

[0031] An air pump box, the air pump box is arranged on one side of the box body, and an air pump is arranged inside the air pump box;

[0032] An air extraction pipe and a connecting pipe, the air extraction pipe is arranged at the input port of the air pump, and the air extraction pipe is communicated with the box body, the connecting pipe is arranged at the output port of the air pump, and the connecting pipe is communicated with the drying assembly.

[0033] Preferably, the drying assembly includes a drying box, one side of the drying box is hinged with a sealing plate, a plurality of communication holes are arranged at equal distances on one side of the drying box, the communication holes are used for communicating the drying box and the box body, and the connecting pipe is communicated with the drying box.

[0034] Preferably, it further includes:

[0035] A rectangular groove, the rectangular groove is opened at the top of the first support plate, and the rectangular groove penetrates through the rectangular hole;

[0036] A transmission rod, the transmission rod is slidably connected in the rectangular groove, and the transmission rod is fixed to the slider, and one side of the transmission rod is a bevel structure;

[0037] An outer lock core, the outer lock core is arranged on the side wall of the placement box;

[0038] An inner lock core, the inner lock core is rotatably arranged inside the outer lock core;

[0039] A gear, the gear is rotatably arranged on the inner side wall of the placement box, and the gear is fixed to the inner shuttle core;

[0040] A rack plate, the rack plate is slidably arranged on the inner side wall of the placement box, and the rack plate is engaged with the gear;

[0041] A convex block, the convex block is arranged at one end of the rack plate, and one side of the convex block close to the transmission rod is a bevel structure.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] (1) Through the connecting rod, the first through hole and the second through hole provided in the present invention, during the use process, when the placement box is drawn out, the connecting rod slowly rises along the second through hole, and further, the connecting rod needs to slide upward along the first through hole. Conversely, by restricting the component to restrict the connecting rod from rising along the first through hole, the placement box can be prevented from being drawn out, thereby ensuring the safety performance of the material.

[0044] (2) Through the pressure sensor, spring, electromagnet, connecting rod and slider provided in the present invention, when the information is not recognized and the placement box is forcibly drawn out through the connecting plate, the connecting rod cannot move under the action of the restricting component, and thus can only drive the slider to move a certain distance along the rectangular hole through the connecting rod. At this time, the deformation of the spring causes the pressure sensor to generate a signal. When the controller only receives the signal of the pressure sensor, the controller controls the alarm module to work, further improving the safety of the material.

[0045] (3) Through the electromagnet, spring, guide rod, connecting rod, restricting rod and restricting block provided in the present invention, during the use process, when information is input through the NFC card at the radio frequency inductor and the information is in line, the controller turns on the switch of the electromagnet. Since the restricting block can move a certain distance with the chute, the electromagnet adsorbs the slider to move a certain distance. During the movement of the slider, the connecting rod drives the connecting rod to slide upward. During the upward sliding of the connecting rod, the restricting rod is driven away from the restricting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0048] Figure 2 is a schematic sectional structure diagram of the box body part of the present invention;

[0049] Figure 3 is a schematic structure diagram of the air pump box, the air extraction pipe and the connecting pipe of the present invention;

[0050] Figure 4 is a schematic structure diagram of the first bracket and the second bracket of the present invention;

[0051] Figure 5 is the Figure 4 partial enlarged structure diagram at A in the present invention;

[0052] Figure 6 Schematic diagram of the first through hole and the second through hole structure of the present invention;

[0053] Figure 7 Schematic diagram of the electromagnet, spring, slider and connecting rod structure of the present invention;

[0054] Figure 8 Schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0055] Figure 9 Schematic diagram of the gear and rack plate structure of the second embodiment of the present invention;

[0056] Figure 10 Schematic diagram of the top view structure of the placement box of the second embodiment of the present invention.

[0057] Reference numerals:

[0058] 1, box body; 2, instrument; 3, drying box; 4, sealing plate; 5, air pump box; 6, exhaust pipe; 7, connecting pipe; 8, connecting plate; 9, placement box; 10, first bracket; 11, radio frequency inductor; 12, communication hole; 13, second bracket; 14, rectangular hole; 15, connecting rod; 16, limiting rod; 17, limiting block; 18, sliding groove; 19, first through hole; 20, second through hole; 21, connecting rod; 22, pressing block; 23, electromagnet; 24, spring; 25, guide rod; 26, pressure sensor; 27, slider; 28, outer lock core; 29, inner lock core; 30, transmission rod; 31, gear; 32, rack plate; 33, convex block. Detailed implementation manners

[0059] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0060] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0061] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] Next, with reference to Figures 1 to 7 As shown in the figure, the embodiment of the present invention provides an intelligent self-service material rack for economic management, including:

[0063] A box body 1, on one side of the box body 1, a plurality of equally spaced openings are provided;

[0064] Two first brackets 10 are provided, and the two first brackets 10 are arranged on both sides of the opening on the inner wall of the box body 1. A second bracket 13 is fixed at a position on the inner wall of the box body 1 near the lower part of the opening. A first through hole 19 is formed on one side of each of the two first brackets 10;

[0065] A placement box 9 is slidably arranged on the two first brackets 10 and the second bracket 13. The placement box 9 is used for storing economic management materials. The bottom of the placement box 9 is a porous structure. Second through holes 20 are formed on both sides of the placement box 9. Both of the two second through holes 20 are arc-shaped structures with an upward trend. A connecting plate 8 is fixed on one side of the placement box 9;

[0066] A connecting rod 21 is slidably arranged in the two second through holes 20, and the connecting rod 21 penetrates through the two first through holes 19. A pressing block 22 is fixed at the bottom of the connecting rod 21. The pressing block 22 is used for compacting the economic management materials in the placement box 9;

[0067] A limiting component is arranged on one of the first brackets 10. The limiting component is used for restricting the up and down sliding of the connecting rod 21 along the first through hole 19;

[0068] A management component is arranged on one side of the box body 1. The management component is used for controlling the operation of the limiting component.

[0069] Furthermore, an air supply component and a drying component are further included. The air supply component and the drying component are both arranged on one side of the box body 1. The air supply component is used for circulating the gas inside the box body 1, and the air supply component and the drying component are communicated to dry the gas inside the box body 1.

[0070] Under the action of the limiting component, when the information does not conform, the connecting rod 21 is forced to move upward, and the alarm module is controlled to work through the management component, improving the safety of the materials.

[0071] Furthermore, the limiting component includes:

[0072] A rectangular hole 14 is formed on one of the first brackets 10;

[0073] An electromagnet 23 is arranged on one side inside the rectangular hole 14. A spring 24 is arranged on one side of the electromagnet 23. A slider 27 is slidably connected inside the rectangular hole 14;

[0074] A connecting rod 15, and both ends of the connecting rod 15 are rotatably connected to the connecting rod 21 and the slider 27 respectively;

[0075] A fixing component is slidably arranged on one side of the placement box 9. The fixing component is used for fixing the placement box 9 so that the placement box 9 cannot be easily pulled out of the box body 1;

[0076] It further includes a guide rod 25 which is arranged in the rectangular hole 14, and a slider 27 is slidably arranged on the guide rod 25.

[0077] The fixing component includes:

[0078] A limiting rod 16 which is arranged on the connecting rod 21 and penetrates through the bottom of the first bracket 10;

[0079] A chute 18 which is opened on one side of the placement box 9,

[0080] A limiting block 17 which is slidably arranged in the chute 18, and a limiting hole is opened at the top of the limiting block 17 for the limiting rod 16 to pass through.

[0081] When the switch of the electromagnet 23 is turned on, since the limiting block 17 can move a certain distance along the chute 18, the electromagnet 23 adsorbs the slider 27 to move a certain distance. During the movement of the slider 27, the connecting rod 15 drives the connecting rod 21 to slide upward. During the upward sliding of the connecting rod 21, the limiting rod 16 is driven away from the limiting block 17, and then the placement box 9 can be taken out through the connecting plate 8 to take the material.

[0082] Further, a groove is opened on one side of the slider 27, a pressure sensor 26 is fixed in the groove, and the pressure sensor 26 is fixed to the spring 24.

[0083] Further, the management component includes:

[0084] An instrument 2 which is arranged on one side of the box body 1;

[0085] A radio frequency inductor 11 which is arranged on one side of the instrument 2. The radio frequency inductor 11 and the pressure sensor 26 are connected to the same controller through signal lines, and the controller is electrically connected to the electromagnet 23;

[0086] An alarm module which is arranged in the box body 1 and is electrically connected to the controller.

[0087] Information is input at the radio frequency inductor 11 through the NFC card. After the information is verified, the controller turns on the switch of the electromagnet 23.

[0088] Further, the air supply component includes:

[0089] An air pump box 5 which is arranged on one side of the box body 1, and an air pump is arranged in the air pump box 5;

[0090] An air extraction pipe 6 and a connecting pipe 7. The air extraction pipe 6 is arranged at the input port of the air pump and is communicated with the box body 1, and the connecting pipe 7 is arranged at the output port of the air pump and is communicated with the drying component.

[0091] The drying component includes a drying box 3. A sealing plate 4 is hinged to one side of the drying box 3. A plurality of communication holes 12 are equidistantly distributed on one side of the drying box 3. The communication holes 12 are used to communicate the drying box 3 and the box body 1. A connecting pipe 7 is communicated with the drying box 3.

[0092] When the humidity of the gas inside the box body 1 is relatively high, turn on the switch of the air pump. The air pump pumps the gas into the drying box 3 through the suction pipe 6 and the connecting pipe 7. Open the sealing plate 4 and store the water-absorbing resin in the drying box 3. The gas is dried under the action of the water-absorbing resin and finally enters the box body 1 through the communication holes 12, preventing the materials inside the box body 1 from being damaged due to excessive gas humidity.

[0093] The specific working method is as follows: When taking economic management materials, first input information at the radio frequency sensor 11 through the NFC card. After the information is verified, the controller turns on the switch of the electromagnet 23. Since the limiting block 17 can move a certain distance along the sliding groove 18, the electromagnet 23 adsorbs the slider 27 to move a certain distance. During the movement of the slider 27, the connecting rod 15 drives the connecting rod 21 to slide upward. During the upward sliding of the connecting rod 21, the limiting rod 16 is driven away from the limiting block 17, and then the placement box 9 can be pulled out through the connecting plate 8 to take the materials. On the contrary, when the information does not match and the placement box 9 is forcibly pulled out through the connecting plate 8, since the connecting rod 21 is forced to move upward, the slider 27 is driven by the connecting rod 15 to move a partial distance along the rectangular hole 14. At this time, the pressure sensor 26 generates a signal due to the deformation of the spring 24. When the controller only receives the signal of the pressure sensor 26, the controller controls the alarm module to work, improving the security of the materials. During the storage of the materials, when the humidity of the gas inside the box body 1 is relatively high, turn on the switch of the air pump. The air pump pumps the gas into the drying box 3 through the suction pipe 6 and the connecting pipe 7. Open the sealing plate 4 and store the water-absorbing resin in the drying box 3. The gas is dried under the action of the water-absorbing resin and finally enters the box body 1 through the communication holes 12, preventing the materials inside the box body 1 from being damaged due to excessive gas humidity. During the operation of the air pump, since the bottom of the placement box 9 is a porous structure and the pressing block 22 on the connecting rod 21 presses the materials, one end of the materials is lifted, so that the stacked paper materials are all in uniform contact with the gas, further preventing the materials from being damaged due to moisture.

[0094] Embodiment 2:

[0095] Combined with Figures 8 to 10 as shown:

[0096] An intelligent self-service material rack for economic management further includes:

[0097] A rectangular groove is opened at the top of the first support plate 10 and the rectangular groove penetrates through the rectangular hole 14;

[0098] The transmission rod 30 is slidably connected in the rectangular groove, and the transmission rod 30 is fixed to the slider 27. One side of the transmission rod 30 is of an inclined surface structure;

[0099] The outer lock core 28 is arranged on the side wall of the placement box 9;

[0100] The inner lock core 29 is rotatably arranged inside the outer lock core 28;

[0101] The gear 31 is rotatably arranged on the inner side wall of the placement box 9, and the gear 31 is fixed to the inner shuttle core 29;

[0102] The rack plate 32 is slidably arranged on the inner side wall of the placement box 9, and the rack plate 32 meshes with the gear 31;

[0103] The convex block 33 is arranged at one end of the rack plate 32. One side of the convex block 33 close to the transmission rod 30 is of an inclined surface structure.

[0104] When forgetting to carry the NFC card, the administrator's key can be used to rotate the inner lock core 29 through the key. When the inner lock core 29 rotates, it drives the gear 31 to rotate, and then drives the rack plate 32 to move. During the movement of the rack plate 32, the inclined surface of the convex block 33 is used to squeeze the transmission rod 30. Cooperating with the inclined surface structure at the end of the transmission rod 30, the transmission rod 30 can move a certain distance, and then drive the slider 27 to move a certain distance. At this time, when the placement box 9 is taken out, it will not be restricted by the connecting rod 21, the limiting rod 16, the limiting block 17, etc. While ensuring the safety of the materials, it is convenient for the user to take the materials.

[0105] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent self-service material rack for economic management, characterized in that: include: A box body (1), wherein one side of the box body (1) is provided with a plurality of openings distributed at equal distances; Two first brackets (10), the two first brackets (10) are arranged on the inner wall of the box body (1) at both sides of the opening, a second bracket (13) is fixed to the inner wall of the box body (1) near the bottom of the opening, and a first through hole (19) is opened on one side of the two first brackets (10); A placement box (9), the placement box (9) is slidably arranged on two first brackets (10) and a second bracket (13), the placement box (9) is used to store economic management materials, the bottom of the placement box (9) is a porous structure, both sides of the placement box (9) are provided with second through holes (20), the two second through holes (20) are both arc-shaped structures with an upward trend, and a connecting plate (8) is fixed to one side of the placement box (9); A connecting rod (21), the connecting rod (21) is slidably disposed in the two second through holes (20), and the connecting rod (21) passes through the two first through holes (19), a pressing block (22) is fixed at the bottom of the connecting rod (21), and the pressing block (22) is used to compact the economic management material in the placement box (9); a limiting component, the limiting component being arranged on one of the first brackets (10), the limiting component being used to limit the connecting rod (21) from sliding up and down along the first through hole (19); A management component is arranged on one side of the box body (1), and is used to control the operation of the restriction component.

2. The intelligent self-service material rack for economic management according to claim 1 is characterized in that: It also comprises an air supply component and a drying component, both of which are arranged on one side of the box body (1), the air supply component is used to circulate the gas inside the box body (1), and the air supply component and the drying component are connected to dry the gas inside the box body (1).

3. The intelligent self-service material rack for economic management according to claim 1 is characterized in that: The restriction components include: A rectangular hole (14), wherein the rectangular hole (14) is formed on one of the first brackets (10); An electromagnet (23), the electromagnet (23) being arranged on one side of the rectangular hole (14), a spring (24) being arranged on one side of the electromagnet (23), and a slider (27) being slidably connected in the rectangular hole (14); A connecting rod (15), wherein two ends of the connecting rod (15) are rotatably connected to a connecting rod (21) and a sliding block (27) respectively; A fixing component is slidably arranged on one side of the placement box (9), and is used to fix the placement box (9) so that the placement box (9) cannot be easily drawn out of the box body (1).

4. The intelligent self-service material rack for economic management according to claim 3 is characterized in that: It also comprises a guide rod (25), wherein the guide rod (25) is arranged in the rectangular hole (14), and a slider (27) is slidably arranged on the guide rod (25).

5. The intelligent self-service material rack for economic management according to claim 3 is characterized in that: The fixing assembly comprises: A limiting rod (16), wherein the limiting rod (16) is arranged on the connecting rod (21), and the limiting rod (16) passes through the bottom of the first bracket (10); A slide groove (18), wherein the slide groove (18) is provided on one side of the placement box (9), A limiting block (17) is slidably arranged in a slide groove (18), and a limiting hole is provided on the top of the limiting block (17) for the limiting rod (16) to pass through.

6. The intelligent self-service material rack for economic management according to claim 3 is characterized in that: A groove is provided on one side of the sliding block (27), a pressure sensor (26) is fixed in the groove, and the pressure sensor (26) and the spring (24) are fixed.

7. The intelligent self-service material rack for economic management according to claim 6, characterized in that: The management components include: An instrument (2), wherein the instrument (2) is arranged on one side of the box body (1); A radio frequency sensor (11), wherein the radio frequency sensor (11) is arranged on one side of the instrument (2), the radio frequency sensor (11) and the pressure sensor (26) are connected to the same controller via a signal line, and the controller is electrically connected to the electromagnet (23); An alarm module is arranged in the box (1), and the alarm module is electrically connected to a controller.

8. The intelligent self-service material rack for economic management according to claim 2, characterized in that: The air supply assembly comprises: An air pump box (5), the air pump box (5) being arranged on one side of the box body (1), and an air pump being arranged inside the air pump box (5); An air extraction pipe (6) and a connecting pipe (7), wherein the air extraction pipe (6) is arranged on the input port of the air pump and is connected to the box body (1); and the connecting pipe (7) is arranged on the output port of the air pump and is connected to the drying component.

9. The intelligent self-service material rack for economic management according to claim 8, characterized in that: The drying assembly comprises a drying box (3), a sealing plate (4) is hingedly connected to one side of the drying box (3), a plurality of communication holes (12) distributed at equal distances are opened on one side of the drying box (3), the communication holes (12) are used to connect the drying box (3) and the housing (1), and the connecting pipe (7) is connected to the drying box (3).

10. The intelligent self-service material rack for economic management according to claim 3, characterized in that: Also includes: A rectangular groove, the rectangular groove being opened on the top of the first support plate (10) and passing through the rectangular hole (14); A transmission rod (30), wherein the transmission rod (30) is slidably connected in the rectangular groove, and the transmission rod (30) and the slider (27) are fixed, and one side of the transmission rod (30) is an inclined surface structure; An external lock core (28), wherein the external lock core (28) is arranged on a side wall of the placement box (9); An inner lock core (29), wherein the inner lock core (29) is rotatably disposed in the outer lock core (28); A gear (31), the gear (31) is rotatably arranged on the inner wall of the placement box (9), and the gear (31) and the inner lock core (29) are fixed; A rack plate (32), wherein the rack plate (32) is slidably disposed on the inner wall of the placement box (9), and the rack plate (32) is meshed with the gear (31); A convex block (33) is arranged at one end of the rack plate (32), and a side of the convex block (33) close to the transmission rod (30) is an inclined surface structure.

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