A continuous biological sample delivery mechanism

Abstract

The present invention discloses a continuous biological sample transfer mechanism, and relates to the technical field of sample transfer. The present invention comprises a support box; the support box comprises a panel; a receiving chamber is vertically arranged in the middle of the panel; two opposite side walls of the panel are provided with transfer windows connected with the receiving chamber; a bottom plate is fixed to the lower surface of the panel; an air outlet is arranged on the upper surface of the panel; an air outlet assembly is installed below the air outlet; a top plate is horizontally fixed to the upper surface of the panel; an air inlet is arranged on the upper surface of the top plate; an air inlet assembly is installed above the air inlet; a plurality of first installation chambers are evenly distributed on the edge of the upper surface of the carrier plate; a movable box is slidably connected in the first installation chamber; a push-pull assembly is installed between the plurality of movable boxes; a support platform and a positioning assembly are installed above the movable box. The present invention not only has a reasonable structural design and is convenient to use, but also effectively improves the efficiency of sample transfer.

Description

Technical Field

[0001] The invention belongs to the technical field of sample transfer, and in particular relates to a continuous biological sample transfer mechanism. Background Art

[0002] The transfer window is a device installed at the entrance and exit of the clean room or between rooms of different cleanliness levels to block the airflow between indoor and outdoor areas when transferring goods, so as to prevent polluted air from entering the clean area and causing cross contamination. When transferring materials, the air shower transfer window blows out high-speed, clean air from the top to remove dust particles on the surface of the goods.

[0003] The transfer window in the prior art is developing towards automation, that is, the box door opens and closes automatically, and the sample box is automatically picked up and placed by a manipulator. However, the sample box may be offset during the transfer process, which causes the manipulator to be unable to accurately grasp the sample box, increasing the uncertainty when the sample box is transferred. In addition, the existing transfer window operation process is complicated, and the box doors on both sides of the box body need to be opened and closed frequently to prevent gas exchange on both sides of the transfer window. However, when transferring multiple different samples or large batches of the same samples, the transfer efficiency is low, wasting the operator's time. Therefore, it is urgent to study a continuous biological sample transfer mechanism to solve the above problems. Summary of the invention

[0004] The present invention provides a continuous biological sample transfer mechanism, the purpose of which is to solve the technical problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a continuous biological sample transfer mechanism, comprising a support box, an air inlet assembly and an air outlet assembly; the support box comprises a panel; a receiving chamber with a circular structure is vertically arranged in the middle of the panel; two opposite side walls of the panel are provided with transfer windows connected with the receiving chamber; a bottom plate coaxially arranged with the receiving chamber is fixed to the lower surface of the panel; a plurality of air outlet holes corresponding to the air outlet assembly are provided on the upper surface of the bottom plate; the air outlet assembly is installed below the air outlet holes; a top plate is horizontally fixed to the upper surface of the panel; a plurality of air inlet holes corresponding to the air inlet assembly are provided on the upper surface of the top plate ; The air inlet assembly is installed above the air inlet hole; the air inlet assembly is arranged directly above the air outlet assembly; a horizontally arranged carrying plate is rotatably installed in the accommodating chamber; a plurality of first installation chambers are evenly distributed on the edge of the upper surface of the carrying plate; a movable box is slidably connected in the first installation chamber; a push-pull assembly is installed between the plurality of movable boxes; the push-pull assembly is used to drive the movable box to move from the first installation chamber to the transfer window or from the transfer window to the first installation chamber; a support platform for carrying a sample box and a positioning assembly for limiting the sample box on the support platform are installed above the movable box.

[0007] As a preferred technical solution of the present invention, a plurality of first ventilation holes corresponding to the air outlet holes are vertically opened on the bottom surface of the first installation chamber; a plurality of second ventilation holes corresponding to the first ventilation holes are vertically opened on the top wall and the bottom wall of the movable box; a slide groove is horizontally opened on the opposite sides of the first installation chamber; one end of the slide groove passes through the circumferential side wall of the carrier plate; a guide protrusion corresponding to the slide groove is fixed on the opposite side walls of the movable box; the guide protrusion is slidably fitted in the slide groove; an annular groove connected to the first installation chamber is vertically opened at the edge of the lower surface of the carrier plate; a pair of arc-shaped limit strips corresponding to the annular groove are symmetrically fixed on the upper surface of the chassis; the arc-shaped limit strip is slidably fitted in the annular groove; a positioning groove corresponding to the arc-shaped limit strip is opened on the bottom wall of the movable box; the arc-shaped limit strip can be slidably fitted in the positioning groove; a pair of conveying gaps corresponding to the two transfer windows are formed between the two arc-shaped limit strips; when any of the movable boxes is directly above the conveying gap, the positioning groove on the movable box is separated from the arc-shaped limit strip.

[0008] As a preferred technical solution of the present invention, a second installation chamber is provided in the middle of the carrier plate; the push-pull assembly is installed in the second installation chamber; the push-pull assembly includes a support plate horizontally fixed to the upper surface of the chassis and a plurality of iron sheets respectively fixed to one side of the movable box; a first servo motor is vertically fixed to the upper surface of the support plate; a transmission gear is horizontally fixed to the output shaft of the first servo motor; a pair of parallel guide racks are meshed on the transmission gear; the separated ends of the two guide racks respectively point to the two transfer windows, and the separated ends of the two guide racks are fixed with electromagnets corresponding to the iron sheets; the guide racks are slidably connected to the first installation block; the first installation block is fixed to the upper surface of the support plate; a through hole connected to the first installation chamber is provided on the side wall of the second installation chamber; the guide rack can be slidably inserted into the through hole.

[0009] As a preferred technical solution of the present invention, a guide channel with a "cross"-shaped structure is opened on the top wall of the movable box; the support platform is horizontally fixed in the middle of the guide channel; the positioning assembly includes four positioning bars respectively vertically slidably arranged in the four ends of the guide channel; the positioning bars are arranged on the peripheral side of the support platform; the four positioning bars are connected by a driving member; the driving member is used to drive the four positioning bars to synchronously approach or move away from the support platform; the driving member includes a second servo motor vertically fixed on the bottom surface of the first installation chamber and a bracket horizontally fixed in the movable box; The output shaft of the second servo motor is coaxially fixed with a transmission column; the transmission column is rotatably inserted into the bottom wall of the movable box; the upper end of the transmission column passes through the bracket and is horizontally fixed with a disc cam; the bracket is in a "cross" structure; the four ends of the bracket are fixed with a second mounting block; the second mounting block is slidably inserted with a horizontally arranged sliding rod; one end of the sliding rod is in conflict with the working surface of the disc cam; the other end of the sliding rod is fixed to the lower end of the positioning strip; a tensioning spring is sleeved on the sliding rod; one end of the tensioning spring is fixed on the sliding rod, and the other end is fixed on the second mounting block.

[0010] The present invention has the following beneficial effects:

[0011] The present invention drives the movable box from the first installation chamber to a transfer window through a push-pull component, and then places the sample box on a support table, and then uses the push-pull component to drive the movable box from the transfer window to the first installation chamber, and uses the positioning component to limit the sample box on the support table, and then rotates the carrier plate to realize the transfer of the sample box from one transfer window to another transfer window, and uses the air inlet component and the air outlet component to dehumidify the sample box during the transfer process driven by the carrier plate, and finally drives the movable box from the first installation chamber to the other transfer window through the push-pull component, so as to realize the transfer of the sample box, which not only avoids the condensation and frosting caused by the flow of external gas into the cold storage when taking and placing the sample box, but also effectively improves the sample transfer efficiency, and also ensures the position stability of the sample box during the transfer process, greatly reduces the uncertainty of the robot taking and placing the sample box, and has a high market application value.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a continuous biological sample transfer mechanism of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the support box of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the chassis of the present invention.

[0017] Figure 4 It is a structural schematic diagram of the movable box and the push-pull assembly of the present invention installed on the carrying plate.

[0018] Figure 5 It is a schematic structural diagram of the carrier plate of the present invention.

[0019] Figure 6 for Figure 5 Structural cross-section view.

[0020] Figure 7 It is a schematic structural diagram of the first installation chamber of the present invention.

[0021] Figure 8 It is a structural schematic diagram of the activity box of the present invention.

[0022] Fig. 9 It is a schematic structural diagram of the push-pull assembly of the present invention.

[0023] Fig.10 It is a schematic structural diagram of the positioning component of the present invention.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-support box, 2-air inlet assembly, 3-air outlet assembly, 4-carrying plate, 5-movable box, 6-push-pull assembly, 7-support table, 8-positioning assembly, 101-enclosure, 102-chassis, 103-top plate, 1031-air inlet hole, 401-first installation chamber, 501-second ventilation hole, 502-guide protrusion, 503-positioning groove, 601-support plate, 602-iron sheet, 603-first servo motor, 604-transmission gear, 605-guide Rack, 606-first mounting block, 607-electromagnet, 801-second servo motor, 802-bracket, 803-transmission column, 804-disc cam, 805-second mounting block, 806-slide rod, 807-tensioning spring, 808-positioning strip, 1011-transfer window, 1021-air outlet, 1022-arc limit strip, 4011-first ventilation hole, 4012-slide groove, 4013-annular groove, 4014-second mounting chamber. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Specific embodiment one:

[0028] See also Figure 1-2 and Figure 4As shown, the present invention is a continuous biological sample transfer mechanism, comprising a support box 1, an air inlet assembly 2 and an air outlet assembly 3; the support box 1 comprises a panel 101; a circular accommodating chamber is vertically arranged in the middle of the panel 101; transfer windows 1011 communicating with the accommodating chamber are provided on opposite side walls of the panel 101; the transfer window 1011 is arranged at the upper edge of the accommodating chamber; in order to ensure the sealing of the transfer window 1011, a conventional automatic opening and closing door assembly in the art can be installed at the transfer window 1011; the automatic opening and closing door assembly is provided at the transfer window 1011. The door closing assembly is composed of an electric push rod and a door stopper; a chassis 102 coaxially arranged with the accommodating chamber is fixed on the lower surface of the enclosure 101; a plurality of air outlet holes 1021 corresponding to the air outlet assembly 3 are opened on the upper surface of the chassis 102; the air outlet holes 1021 are arranged between the two transfer windows 1011; the air outlet assembly 3 is installed below the air outlet holes 1021; a top plate 103 is horizontally fixed on the upper surface of the enclosure 101; a plurality of air inlet holes 1031 corresponding to the air inlet assembly 2 are opened on the upper surface of the top plate 103; the air inlet assembly 2 is installed at the inlet The air inlet assembly 2 is arranged above the air outlet assembly 3; the air inlet assembly 2 and the air outlet assembly 3 are both conventional structures in the art; the air inlet assembly 2 is composed of an air inlet box and an air inlet mechanism installed inside the air inlet box; the air outlet assembly 3 is composed of an air outlet box and an air outlet mechanism installed inside the air outlet box; a horizontally arranged carrier plate 4 is rotatably installed in the accommodating chamber; an outer gear ring is coaxially fixed to the lower surface of the carrier plate 4; a driving gear is meshed on the outer gear ring; the driving gear is fixed to the output shaft of a vertically arranged driving motor; the driving motor It is fixed on the chassis 102; a plurality of first installation chambers 401 are evenly distributed on the edge of the upper surface of the carrier plate 4; a movable box 5 is slidably connected in the first installation chamber 401; a push-pull assembly 6 is installed between the plurality of movable boxes 5; the push-pull assembly 6 is used to drive the movable box 5 to move from the first installation chamber 401 to the transfer window 1011 or from the transfer window 1011 to the first installation chamber 401; a support platform 7 for carrying a sample box and a positioning assembly 8 for limiting the sample box on the support platform 7 are installed above the movable box 5.During use, the movable box 5 is driven by the push-pull component 6 to move from the first installation chamber 401 to a transfer window 1011, and then the sample box is placed on the support table 7, and then the push-pull component 6 is used to drive the movable box 5 from the transfer window 1011 to the first installation chamber 401, and the positioning component 8 is used to limit the sample box on the support table 7, and then the sample box is transferred from one transfer window 1011 to another transfer window 1011 by rotating the carrier plate 4, and the air inlet component 2 and the air outlet component 3 are used to dehumidify the sample box during the sample box transfer driven by the carrier plate 4, and finally the push-pull component 6 is used to drive the movable box 5 from the first installation chamber 401 to the other transfer window 1011, so as to realize the transfer of the sample box, which not only avoids the condensation and frosting caused by the flow of external gas into the cold storage when taking and placing the sample box, but also effectively improves the sample transfer efficiency, and also ensures the position stability of the sample box during the transfer process, greatly reducing the uncertainty of the robot taking and placing the sample box.

[0029] Among them Figure 5-8 As shown, the bottom surface of the first installation chamber 401 is vertically provided with a plurality of first ventilation holes 4011 corresponding to the air outlet holes 1021; the top wall and the bottom wall of the movable box 5 are vertically provided with a plurality of second ventilation holes 501 corresponding to the first ventilation holes 4011; the two opposite side surfaces of the first installation chamber 401 are horizontally provided with slide grooves 4012; one end of the slide groove 4012 penetrates the circumferential side wall of the carrier plate 4; the two opposite side walls of the movable box 5 are fixed with guide protrusions 502 corresponding to the slide grooves 4012; the guide protrusions 502 are slidably matched in the slide grooves 4012. When in use, when the air inlet holes 1031, the air outlet holes 1021, the first ventilation holes 4011 and the second ventilation holes 501 are overlapped, the air inlet assembly 2 and the air outlet assembly 3 are used to perform a dehumidification operation on the sample box, thereby ensuring the dehumidification effect on the sample box.

[0030] Among them Figure 3 and Figure 5-8As shown, an annular groove 4013 connected to the first installation chamber 401 is vertically opened at the edge of the lower surface of the carrier plate 4; a pair of arc-shaped limit strips 1022 corresponding to the annular groove 4013 are symmetrically fixed on the upper surface of the chassis 102; the arc-shaped limit strips 1022 are slidably matched in the annular groove 4013; a positioning groove 503 corresponding to the arc-shaped limit strip 1022 is opened on the bottom wall of the movable box 5; the arc-shaped limit strip 1022 can be slidably matched in the positioning groove 503; a pair of conveying gaps corresponding to the two transfer windows 1011 are formed between the two arc-shaped limit strips 1022; when any movable box 5 is directly above the conveying gap, the positioning groove 503 on the movable box 5 is separated from the arc-shaped limit strip 1022. When in use, when the carrier plate 4 drives the movable box 5 to rotate, the positioning groove 503 cooperates with the arc-shaped limit strip 1022, thereby preventing the movable box 5 from making centrifugal motion and separating from the first installation chamber 401. Specific embodiment 2:

[0032] Based on the specific embodiment 1, Figure 4 and Fig. 9 As shown, a second installation chamber 4014 is opened in the middle of the carrier plate 4; the push-pull assembly 6 is installed in the second installation chamber 4014; the push-pull assembly 6 includes a support plate 601 horizontally fixed to the upper surface of the chassis 102 and a plurality of iron sheets 602 respectively fixed to one side of the movable box 5; a first servo motor 603 is vertically fixed to the upper surface of the support plate 601; a transmission gear 604 is horizontally fixed to the output shaft of the first servo motor 603; a pair of parallel guides are meshed on the transmission gear 604 Rack 605; the separated ends of the two guide racks 605 point to the two transfer windows 1011 respectively, and the separated ends of the two guide racks 605 are fixed with electromagnets 607 corresponding to the iron sheet 602; the guide rack 605 is slidably connected with the first mounting block 606; the first mounting block 606 is fixed on the upper surface of the support plate 601; the side wall of the second mounting chamber 4014 is provided with a through hole connected with the first mounting chamber 401; the guide rack 605 can be slidably inserted into the through hole. When any movable box 5 corresponds to the transfer window 1011, the guide rack 605 is driven to rotate by the first servo motor 603, so that the guide rack 605 and the electromagnet 607 pass through the through hole and approach the iron sheet 602, and the electromagnet 607 is energized after the electromagnet 607 conflicts with the iron sheet 602, so that the movable box 5 can be pulled back into the first installation chamber 401 after the guide rack 605 moves the movable box 5 from the first installation chamber 401 to the transfer window 1011 (in this process, the guide protrusion 502 always slides in the slide groove 4012); when the carrying plate 4 needs to be rotated, the electromagnet 607 is powered off, and the guide rack 605 is completely moved into the second installation chamber 4014. Specific embodiment three:

[0034] Based on the specific embodiment 2, Figure 5 , Figure 8 and Fig.10 As shown, a guide channel in a "cross"-shaped structure is provided on the top wall of the movable box 5; the support platform 7 is horizontally fixed in the middle of the guide channel; the positioning assembly 8 includes four positioning bars 808 which are respectively vertically slidably arranged in the four ends of the guide channel; the positioning bars 808 are arranged on the peripheral side of the support platform 7; the four positioning bars 808 are connected by a driving member; the driving member is used to drive the four positioning bars 808 to move synchronously closer to or away from the support platform 7; the driving member includes a second servo motor 801 vertically fixed to the bottom surface of the first installation chamber 401 and a bracket 802 horizontally fixed in the movable box 5; the output shaft of the second servo motor 801 is coaxially fixed with a transmission column 803; the transmission column 803 rotates through Inserted on the bottom wall of the movable box 5; the upper end of the transmission column 803 passes through the bracket 802 and is horizontally fixed with a disc cam 804 in a "cross" structure; the transmission column 803 and the bracket 802 are clearance-matched; the bracket 802 is in a "cross" structure; the four ends of the bracket 802 are fixed with a second mounting block 805; the second mounting block 805 is slidably interspersed with a horizontally arranged slide bar 806; one end of the slide bar 806 is in conflict with the working surface of the disc cam 804; the other end of the slide bar 806 is fixed to the lower end of the positioning strip 808; a tensioning spring 807 is sleeved on the slide bar 806; one end of the tensioning spring 807 is fixed on the slide bar 806, and the other end is fixed on the second mounting block 805. When in use, the second servo motor 801 drives the disc cam 804 to rotate via the transmission column 803, and the slide bar 806 causes the four positioning bars 808 to synchronously approach or move away from the support table 7, thereby clamping and positioning the sample box on the support table 7, while also ensuring the certainty of the robot arm in taking and placing the sample box.

[0035] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous biological sample transfer mechanism, comprising a support box (1), an air inlet assembly (2) and an air outlet assembly (3); characterized in that: The support box (1) comprises a panel (101); a receiving chamber with a circular structure is vertically arranged in the middle of the panel (101); two opposite side walls of the panel (101) are provided with transfer windows (1011) connected to the receiving chamber; a chassis (102) coaxially arranged with the receiving chamber is fixed on the lower surface of the panel (101); a plurality of air outlet holes (1021) corresponding to the air outlet assembly (3) are provided on the upper surface of the chassis (102); the air outlet assembly (3) is arranged below the air outlet holes (1021); a top plate (103) is horizontally fixed on the upper surface of the panel (101); a plurality of air inlet holes (1031) corresponding to the air inlet assembly (2) are provided on the upper surface of the top plate (103); the air inlet assembly (2) is arranged above the air inlet holes (1031); the air inlet assembly (2) is arranged directly above the air outlet assembly (3); A horizontally arranged carrying plate (4) is rotatably installed in the accommodating chamber; a plurality of first installation chambers (401) are evenly distributed on the edge of the upper surface of the carrying plate (4); a movable box (5) is slidably connected in the first installation chamber (401); a push-pull assembly (6) is installed between the plurality of movable boxes (5); the push-pull assembly (6) is used to drive the movable box (5) to move from the first installation chamber (401) to the transfer window (1011) or from the transfer window (1011) to the first installation chamber (401); a support platform (7) for carrying a sample box and a positioning assembly (8) for limiting the sample box on the support platform (7) are installed above the movable box (5).

2. A continuous biological sample delivery mechanism according to claim 1, characterized in that: The bottom surface of the first installation chamber (401) is vertically provided with a plurality of first ventilation holes (4011) corresponding to the air outlet holes (1021); the top wall and the bottom wall of the movable box (5) are vertically provided with a plurality of second ventilation holes (501) corresponding to the first ventilation holes (4011).

3. A continuous biological sample transfer mechanism according to claim 1 or 2, characterized in that: The first installation chamber (401) has two opposite side surfaces with horizontally provided slide grooves (4012); one end of the slide groove (4012) passes through the circumferential side wall of the carrier plate (4); the two opposite side walls of the movable box (5) are fixed with guide protrusions (502) corresponding to the slide grooves (4012); the guide protrusions (502) are slidably fitted in the slide grooves (4012).

4. A continuous biological sample transfer mechanism according to claim 3, characterized in that: An annular groove (4013) communicating with the first installation chamber (401) is vertically opened at the edge of the lower surface of the carrier plate (4); a pair of arc-shaped limit strips (1022) corresponding to the annular groove (4013) are symmetrically fixed on the upper surface of the chassis (102); the arc-shaped limit strips (1022) are slidably fitted in the annular groove (4013).

5. A continuous biological sample transfer mechanism according to claim 4, characterized in that: The bottom wall of the movable box (5) is provided with a positioning groove (503) corresponding to the arc-shaped limiting strip (1022); the arc-shaped limiting strip (1022) can be slidably matched in the positioning groove (503).

6. The continuous biological sample transfer mechanism according to claim 5, characterized in that: A pair of conveying gaps corresponding to the two transfer windows (1011) are formed between the two arc-shaped limit strips (1022); when any one of the movable boxes (5) is located directly above the conveying gap, the positioning groove (503) on the movable box (5) is disengaged from the arc-shaped limit strip (1022).

7. A continuous biological sample transfer mechanism according to claim 5 or 6, characterized in that: A second installation chamber (4014) is provided in the middle of the carrier plate (4); the push-pull assembly (6) is installed in the second installation chamber (4014); the push-pull assembly (6) comprises a support plate (601) fixed horizontally to the upper surface of the chassis (102) and a plurality of iron sheets (602) fixed respectively to one side of the movable box (5); a first servo motor (603) is vertically fixed to the upper surface of the support plate (601); a transmission gear (604) is horizontally fixed to the output shaft of the first servo motor (603); a pair of parallel guide wheels (604) are meshed on the transmission gear (604) Rack (605); the separated ends of the two guide racks (605) point to the two transfer windows (1011) respectively, and the separated ends of the two guide racks (605) are fixed with electromagnets (607) corresponding to the iron sheet (602); the guide rack (605) is slidably connected with a first mounting block (606); the first mounting block (606) is fixed on the upper surface of the support plate (601); the side wall of the second mounting chamber (4014) is provided with a through hole connected to the first mounting chamber (401); the guide rack (605) can be slidably inserted into the through hole.

8. The continuous biological sample transfer mechanism according to claim 7, characterized in that: The top wall of the movable box (5) is provided with a guide channel in a "cross"-shaped structure; the support platform (7) is horizontally fixed in the middle of the guide channel; the positioning assembly (8) comprises four positioning bars (808) respectively arranged in a vertical sliding manner in the four ends of the guide channel; the positioning bars (808) are arranged on the peripheral side of the support platform (7); the four positioning bars (808) are connected by a driving member; and the driving member is used to drive the four positioning bars (808) to synchronously approach or move away from the support platform (7).

9. The continuous biological sample transfer mechanism according to claim 8, characterized in that: The driving member comprises a second servo motor (801) vertically fixed on the bottom surface of the first installation chamber (401) and a bracket (802) horizontally fixed in the movable box (5); a transmission column (803) is coaxially fixed to the output shaft of the second servo motor (801); the transmission column (803) is rotatably inserted into the bottom wall of the movable box (5); the upper end of the transmission column (803) passes through the bracket (802) and is horizontally fixed with a disc cam (804); the bracket (802) is in a "cross" shape; the four ends of the bracket (802) are A second mounting block (805) is fixed at each end; a horizontally arranged sliding rod (806) is slidably inserted into the second mounting block (805); one end of the sliding rod (806) is in contact with the working surface of the disc cam (804); the other end of the sliding rod (806) is fixed to the lower end of the positioning bar (808); a tensioning spring (807) is sleeved on the sliding rod (806); one end of the tensioning spring (807) is fixed on the sliding rod (806); and the other end of the tensioning spring (807) is fixed on the second mounting block (805).

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