A tube receiving box dispensing mechanism for a tube labeling and preparation machine and a method of using the same

Abstract

The application discloses a tube receiving box distribution mechanism suitable for a test tube labeling and tube preparing machine, which comprises a rack, a supporting assembly, a lifting assembly and a triggering assembly. The application takes the gravity of the tube receiving box as the driving force and locking force source for system state conversion. In the initial bearing state, the weight of the bottommost box body acts on the free end of the limiting block, forming a torque that makes the limiting block rotate around its rotating shaft. The torque forces the limiting groove on the limiting block to be in close engagement with the limiting protrusion of the swing block, realizing mechanical self-locking, so that the entire stack can be reliably supported. After the lifting assembly's supporting plate goes up and supports all the loads, the gravity locking condition is released. Subsequently, the triggering assembly remains in the locked state according to the preset precise motion timing to ensure the smooth transfer of the load, and then drives the swing block to rotate so that the limiting part of the swing block is separated from the limiting groove, unlocking the limiting block. At this time, only the bottommost box body can be separated under the weight.

Description

Technical Field

[0001] This application relates to the technical field of automated medical devices, and in particular to a tube dispenser dispensing mechanism suitable for a test tube labeling and preparation machine. Background Technology

[0002] With hospitals demanding precise, efficient, and error-free procedures, the use of automated equipment is increasing. Fully automated tube preparation systems aim to facilitate better patient care for hospital staff, thereby improving doctor-patient relationships. These systems primarily consist of a screen, operating platform, dispensing port, internal tube labeling unit, and preparation unit. Unmanned tube preparation requires the equipment to prepare the necessary blood collection tubes for each bed before dawn. A tube dispenser is a crucial component in achieving unmanned preparation. The purpose of this invention is to meet the requirements of automated tube dispensing for unmanned preparation, while maintaining a simple structural principle and achieving reliability, efficiency, and low cost within a small space. Summary of the Invention

[0003] The purpose of this application is to provide a tube dispenser distribution mechanism suitable for a test tube labeling and preparation machine, in order to solve the problem of tube distribution without operators.

[0004] In a first aspect, this application provides a tube dispenser dispensing mechanism suitable for a test tube labeling and preparation machine, employing the following technical solution:

[0005] A tube dispenser dispensing mechanism for a test tube labeling and preparation machine includes a frame; a support assembly fixedly connected to the frame, including at least one support frame, a limiting block disposed on the support frame, and a first elastic member disposed between the limiting block and the support frame, the support frame having a receiving area that extends vertically and can accommodate stacked tube dispensers, the first elastic member forcing the limiting block to remain horizontal and extending into the receiving area; a lifting assembly including a tray located below the receiving area and a drive unit for driving the tray to move vertically; and a trigger assembly for controlling the limiting block to extend into or retract into the receiving area, including a trigger plate fixedly connected to the output end of the drive unit, and a trigger block and a swing block rotatably connected to the end of the support frame, the trigger plate being able to abut against the end of the trigger block, the trigger block being drive-coupled with the swing block, the swing block having a limiting part that can abut against the bottom of the limiting block, the limiting part being able to restrict the rotation of the limiting block.

[0006] By adopting the above scheme, the support component, lifting component, and triggering component work together to form a "support-lifting-triggering-release" linkage mechanism. Specifically, the lifting component acts directly on the pipe box through the support plate, and its movement is transmitted to the triggering component through the trigger plate; the triggering component, as the control hub, directly determines the locking and releasing state of the limit block by the posture of its swing block. This linkage transforms a single lifting action into precise control of the limit block, realizing the core function of automatically opening the "gate" and distributing individual pipe boxes at the correct timing.

[0007] Preferably, a second elastic element is provided between the trigger block and the support frame, and the second elastic element forces the trigger block to rotate toward the trigger plate;

[0008] A third elastic element is provided between the swing block and the support frame, which forces the swing block to rotate away from the trigger plate.

[0009] By adopting the above scheme, the second and third elastic elements provide a defined initial position and reset force for the trigger block and the swing block, establishing a dynamic balance between them. The second elastic element ensures that the trigger block can respond promptly to the contact of the trigger plate; the third elastic element enables the swing block to rotate actively and quickly after the lock is released, driving the limit part to disengage. The synergistic effect of these two elastic elements ensures the timing and reset reliability of the internal actions of the trigger assembly.

[0010] Preferably, the swing block has a groove, and the trigger block has a driving part that extends into the groove.

[0011] By adopting the above scheme, the cooperation between the groove and the drive unit forms a transmission coupling relationship with stroke buffering characteristics. This allows the drive unit to move within the groove during the initial rotation phase of the trigger block, but without forcibly driving the swing block. Only when the lock is truly released does the drive unit push against the groove wall, driving the swing block to rotate.

[0012] Preferably, the groove is provided with a first point, a second point, and a third point;

[0013] Initial state: The connecting box is placed on the limiting block, and the limiting part of the swing block and the bottom end of the limiting block are locked together by the connecting box. The driving part is located at the first point.

[0014] When the trigger block rotates upward: the drive unit moves from the first position to the second position, and the swing block remains stationary;

[0015] When the connector box is raised to release the locking state between the limiting part and the limiting block, the swing block rotates under the action of the third elastic element. At this time, the drive part moves from the second point to the third point.

[0016] When the trigger block resets and rotates: the drive unit moves from the third position to the first position, and the drive unit drives the swing block to reset and rotate.

[0017] By adopting the above scheme, the phase relationship between the trigger block and the swing block in the motion cycle is clearly defined at three points. The first point corresponds to the locked and ready-to-launch state of the mechanism; the movement from the first point to the second point is the idle stroke stage where the trigger block stores energy, at which time the swing block is mechanically locked by the limit block; the movement from the second point to the third point is the active unlocking stage after the swing block is released; the return from the third point to the first point is the coordinated reset stage of both under the action of the elastic element. This phased point relationship ensures the logical rigor and cyclic stability of the mechanical action.

[0018] Preferably, the limiting block is rotatably connected to the support frame, and the contact point between the limiting block and the first elastic element and the contact point between the limiting block and the limiting part are located on both sides of the rotation center of the limiting block.

[0019] By employing the above scheme, the first elastic element and the limiting part exert opposite torques on the limiting block, forming a "torque switch." When the connecting box is under load, its gravity generates a torque through the point of application of the limiting part, keeping the limiting block horizontal and counteracting the upward torque of the first elastic element, thus achieving stable locking. When the connecting box is removed, the gravitational torque disappears, and the torque of the first elastic element causes the limiting block to quickly flip upward and maintain a horizontal state. This lever-like torque relationship makes the state switching of the limiting block very sensitive and certain.

[0020] Preferably, the limiting part is provided with an avoidance area, which can hide the end of the limiting block when the free end of the limiting block rotates downward.

[0021] By adopting the above scheme, when the limit block is pressed down by the upper box, the free end of the limit block rotates, and the avoidance area provides space for the limit block to rotate, thus optimizing the interference relationship between the swing block and the limit block at the moment of reset.

[0022] Preferably, the trigger plate has at least one abutment portion, the end of the trigger block has a roller, the roller can abut against the abutment portion, and the end of the abutment portion has a bent portion.

[0023] By adopting the above solution, the sliding friction pair between the roller and the contact part is changed to a rolling friction pair, which greatly reduces the wear of the contact surface and the resistance to movement. The bending part allows the trigger block to smoothly transition the force in the initial contact stage.

[0024] Preferably, the bottom end of the limiting block is provided with a limiting groove, and the limiting groove has no opening on at least one side. The limiting part moves to below the limiting groove by rotation.

[0025] By adopting the above scheme, the limiting groove and the limiting part form a "pin-type" locking relationship with a clear mating interface.

[0026] Secondly, this application provides a method for using a junction box distribution mechanism, which adopts the following technical solution:

[0027] A method for using a junction box distribution mechanism specifically includes the following steps:

[0028] S1. Place the stacked pipe box into the receiving area, with the bottom box placed on the limiting block. The tray rises to the first position to support the pipe box. The trigger plate rises and pushes the trigger block to rotate. At this time, the limiting part and the limiting block are locked under the action of gravity, and the trigger component is in the initial state.

[0029] S2. The tray continues to rise to the second position, the bottom box is lifted and detached from the limiting block, the limiting block loses the effect of gravity, and is reset to a horizontal state under the torque of the first elastic member. At the same time, the locking state between the limiting part and the limiting block is released, and the third elastic member drives the swing block to rotate to the trigger block driving part, while avoiding the rotation area of ​​the limiting block.

[0030] S3. The tray descends, and the gravity of the bottom box causes the limiting block to rotate and make room against the force of the first elastic element. After the bottom box is disengaged, the limiting block resets and remains horizontal under the torque of the first elastic element. After the trigger plate descends below the first position, the trigger block and the swing block reset under the action of the elastic element, and the limiting part returns to the waiting position. The upper box falls down and presses down the limiting block that is still horizontal, and its bottom is locked again by the limiting part, and the mechanism returns to the initial state.

[0031] By adopting the above scheme: the stacked pipe boxes are placed in the receiving area of ​​the support component, with the bottom pipe box supported on the limiting block. The drive unit drives the tray to rise to the first position, and the trigger plate pushes the trigger block to rotate as it rises. At this time, the limiting part locks with the bottom of the limiting block under the weight of the pipe box, and the trigger component is in its initial state. The drive unit drives the tray to continue rising to the second position, and the bottom pipe box moves upward accordingly, its upper surface lifting the pipe box above it. When the pipe box is completely detached from the limiting block, its downward pressure on the limiting block disappears, and the balance of the trigger component is broken. During the rising process, the trigger block remains in a fixed position. After the balance of the trigger component is broken, the limiting part disengages from the bottom of the limiting block. The limiting block returns to a horizontal state under the action of the first elastic element, and the swing block rotates to the driving part of the trigger block due to the force of the third elastic element. The drive unit drives the tray to descend, and the bottom pipe box, which is being supported, descends and passes through. The space vacated by the weight of the pipe box by the limiting block finally leaves the receiving area to complete the distribution. As the pallet continues to descend below the first position, the trigger plate disengages from the trigger block, and the trigger block and the swing block reset successively under the action of the second elastic element. The limiting part of the swing block swings back to the ready-to-trigger position. At the same time, the upper pipe box falls under the action of gravity, and its bottom presses down on the reset limiting block. After the limiting block rotates due to the gravity of the pipe box overcoming the force of the first elastic element, its bottom is locked again by the limiting part of the swing block, and the mechanism returns to its initial state, ready for the next distribution.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. A purely mechanical interlocking trigger system enables the serialization and precise distribution of stacked pipe boxes. Its working principle essentially uses the gravity of the pipe boxes as the driving force and locking force for system state transitions. In the initial load-bearing state, the weight of the bottommost box acts on the free end of the limiting block, creating a torque that causes the limiting block to rotate around its axis. This torque forces the limiting groove on the limiting block to tightly engage with the limiting protrusion of the swing block, achieving mechanical self-locking and reliably supporting the entire stack. After the lifting assembly's pallet rises and supports the entire load, this gravity locking condition is released. Subsequently, the trigger assembly, according to a preset precise motion sequence, first maintains the locked state to ensure smooth load transfer, then drives the swing block to rotate, causing its limiting part to disengage from the limiting groove, thus unlocking the limiting block. At this point, only the bottommost box is released under its own weight.

[0034] 2. A highly integrated and precisely time-controlled purely mechanical triggering and reset system was designed. This system uses the linear displacement of the lifting assembly as input, and through a trigger plate with a specific geometric profile, a trigger block, and a swing block with multi-point positioning grooves, it transforms linear motion into a series of controlled rotational movements. The spatial relationship of the first, second, and third points in the grooves is carefully designed to define distinct action stages: during the movement of the drive unit from the first point to the second point, the motion of the trigger block is absorbed by the groove, the swing block remains stationary, and the limit lock remains effective. This stage ensures a smooth transition of the load from the limit block to the pallet; only after the pallet is fully loaded, and the drive unit enters the movement stage from the second point to the third point, does it release the constraint on the swing block, allowing it to quickly rotate and unlock under the energy storage drive of the third elastic element. Simultaneously, each rotating joint is equipped with a torsion spring to ensure that the trigger block, swing block, and limit block automatically and accurately reset to their initial standby state after each working cycle. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall assembly structure of Embodiment 1 of this application;

[0036] Figure 2 This is a schematic diagram of the overall structure of the distribution mechanism in Embodiment 1 of this application;

[0037] Figure 3 This is a schematic diagram of the overall structure of the triggering component in Embodiment 1 of this application;

[0038] Figure 4 This is a schematic diagram of the overall structure of the limiting block in Embodiment 1 of this application;

[0039] Figure 5 This is a schematic diagram of the cooperation between the swing block and the limiting block in Embodiment 1 of this application;

[0040] Figure 6 This is a schematic diagram of the limiting block in Embodiment 1 of this application;

[0041] Figure 7 This is a schematic diagram of the overall structure of the trigger block in Embodiment 1 of this application;

[0042] Figure 8 This is a schematic diagram of the overall structure of the groove in Embodiment 1 of this application;

[0043] Figure 9 This is a schematic diagram of the overall structure of the trigger plate in Embodiment 1 of this application;

[0044] Figure 10 This is a schematic diagram of the junction box structure of this application.

[0045] Explanation of reference numerals in the attached drawings: 1. Connecting pipe box; 11. Layer edge; 2. Support frame; 3. Lifting assembly; 31. Tray; 32. Drive unit; 4. Trigger assembly; 41. Trigger block; 411. Roller; 412. Drive unit; 42. Swing block; 421. Limiting part; 422. Avoidance area; 423. First position; 424. Second position; 425. Third position; 43. First elastic element; 44. Second elastic element; 45. Third elastic element; 5. Trigger plate; 51. Abutting part; 52. Bending part; 6. Limiting block; 61. Limiting groove; 7. Receiving area. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1 - Appendix Figure 10 This application will be described in further detail.

[0047] This application discloses a tube dispenser distribution mechanism suitable for a test tube labeling and preparation machine.

[0048] refer to Figure 10 The connector box 1 includes a box body with an open top and a ring of layered edges 11 on the side. Several boxes can be stacked on top of each other, and the layered edges 11 restrict the positioning.

[0049] Example 1, referring to Figure 1 and Figure 2 The tube dispenser 1 dispensing mechanism of a test tube labeling and preparation machine includes a frame, a support assembly, a lifting assembly 3, and a trigger assembly 4. The frame is used to fix and install the other mechanisms or components. In Embodiment 1, the support assembly includes two concave support frames 2, which are arranged opposite each other. The concave portions of the two support frames 2 form a receiving area 7. Limiting blocks 6 are rotatably connected to both ends of the support frames 2. The limiting blocks 6 extend into the receiving area 7 to prevent the tube dispenser 1 from falling. The lifting assembly 3 includes a tray 31 disposed below the receiving area 7 and a drive unit 32 that drives the tray 31 to move vertically. In Embodiment 1, the drive unit 32 is exemplified by a lead screw assembly and a motor. The stacked tube dispensers 1 are placed on the tray 31, and the tube dispensers 1 move vertically within the receiving area 7 under the combined action of the tray 31 and the drive unit 32. The trigger assembly 4 is mechanically connected to both the support assembly and the lifting assembly 3.

[0050] refer to Figure 2 and Figure 3 A first elastic element 43 is provided between the end of the limiting block 6 and the support frame 2. The first elastic element 43 forces the end of the limiting block 6 to flip down, and the other end of the limiting block 6 abuts against the support frame 2. Under the driving force of the first elastic element 43 and the limiting action of the support frame 2, the limiting block 6 can remain horizontal. In embodiment 1, the first elastic element 43 is a torsion spring, but it can also be a spring.

[0051] refer to Figure 3The trigger assembly 4 includes a trigger plate 5 fixedly connected to the output end of the drive unit 32, and a trigger block 41 and a swing block 42 rotatably connected to the ends of the support frame 2. A second elastic element 44 is provided between the trigger block 41 and the support frame 2, and the second elastic element 44 forces the free end of the trigger block 41 to rotate toward the trigger assembly 4. A third elastic element 45 is provided between the swing block 42 and the support frame 2, and the third elastic element 45 forces the free end of the swing block 42 to move away from the limiting block 6. In embodiment 1, the second elastic element 44 and the third elastic element 45 are torsion springs, but they can also be springs.

[0052] In Example 1, both ends of the support frame 2 are provided with trigger components 4, and the trigger blocks 41 in the two trigger components 4 are connected by a rotating shaft.

[0053] The trigger block 41 is provided with a driving part 412. In embodiment 1, the driving part 412 is a protruding cylinder. The swing block 42 is provided with a groove. The driving part 412 can extend into the groove to realize the mechanical coupling between the trigger block 41 and the swing block 42.

[0054] refer to Figure 3 and Figure 4 The bottom end of the limiting block 6 is provided with a limiting groove 61, and one side of the limiting groove 61 is provided with an opening. The swing block 42 is provided with a limiting part 421. In embodiment 1, the limiting part 421 includes a limiting protrusion and a clearance area 422. The limiting protrusion can move to below the limiting groove 61. In embodiment 1, the limiting groove 61 and the first elastic member 43 are located on both sides of the rotation center of the limiting block 6. When the limiting block 6 receives the connecting box 1, the gravity of the connecting box 1 is applied to the free end of the limiting block 6, so that the limiting block 6 and the limiting groove 61 are locked together. The third elastic member 45 drives the swing block 42 to move the limiting part 421 in the direction of disengaging from the limiting groove 61.

[0055] After the gravity on the limiting block 6 disappears, the limiting block 6 is only driven by the first elastic element 43, causing the free end of the limiting block 6 to lift upward and disengage from the limiting groove 61. At this time, the swing block 42 rotates away from the limiting block 6 under the action of the third elastic element 45, and the opening of the clearance area 422 faces the limiting block 6. When the free end of the limiting block 6 rotates downward, the free end of the limiting block 6 can be accommodated in the clearance area 422.

[0056] refer to Figure 5 , Figure 6 and Figure 7The groove is provided with a first point 423, a second point 424 and a third point 425. The trajectory of the drive unit 412 is arc-shaped. Two points are vertically intercepted on the arc-shaped trajectory as the first point 423 and the second point 424. The first point 423 is located below the second point 424. With the rotation center of the swing block 42 as the center and the distance from the second point 424 to the rotation center of the swing block 42 as the radius, the third point 425 is located on the circle. The included angle formed by the line connecting the first point 423 and the second point 424 and the line connecting the first point 423 and the third point 425 is 40°. This angle can be selected and modified as needed.

[0057] refer to Figure 8 and Figure 9 The trigger assembly 4 includes a trigger plate 5. In embodiment 1, the trigger plate 5 is formed by folding a long plate three times. The trigger plate 5 is fixed to the output end of the drive unit 32 by bolts and moves up and down synchronously with the support plate 31. The trigger plate 5 is located between two support frames 2. The two sides of the trigger plate 5 are abutment parts 51, and the top of the abutment part 51 is provided with a bent part 52. The free end of the limiting block 6 is rotatably connected to a roller 411. Under the action of the first elastic member 43, the roller 411 can abut against the abutment part 51, and the bent part 52 facilitates the roller 411 to cut into the abutment part 51.

[0058] The implementation principle of the tube dispensing mechanism of the tube labeling and preparation machine in this application embodiment is as follows: the stacked tube boxes 1 are placed in the receiving area 7, and the layer edge 11 of the bottom tube box 1 abuts against the limiting block 6. At this time, the driving part 412 is located at the first point 423, and the limiting part 421 of the swing block 42 is located in the limiting groove 61. Due to the gravity of the tube box 1, the limiting block 6 and the limiting part 421 are locked.

[0059] The drive unit 32 drives the support plate 31 and the trigger plate 5 to move upward synchronously. The trigger plate 5 pushes the trigger block 41 to both sides, and the trigger plate 5 rotates. At this time, the drive part 412 moves from the first point 423 to the second point 424. Since the limit block 6 is locked with the limit part 421, the swing block 42 is in a stationary state.

[0060] The trigger plate 5 continues to move upward until the support plate 31 receives the connector box 1 and lifts the connector box 1 upward. At this time, the third elastic element 45 drives the swing block 42 to rotate, the drive part 412 moves from the second point 424 to the third point 425, the limiting part 421 disengages from the limiting groove 61, and the limiting block 6 and the limiting part 421 are unlocked.

[0061] At this time, the drive unit 32 causes the tray 31 to descend. Since the limit block 6 and the limit part 421 are unlocked, when the layer edge 11 of the bottommost pipe box 1 contacts the free end of the limit block 6, the limit block 6 can rotate, allowing the bottommost pipe box 1 to pass through the limit block 6.

[0062] The tray 31 and trigger plate 5 continue to move downwards. At this time, the limiting block 6 is located between the edges 11 of the bottom two pipe boxes 1. Under the action of the first elastic member 43, the limiting block 6 returns to a horizontal state. The free end of the limiting block 6 disengages from the abutting part 51 of the trigger plate 5. Under the action of the second elastic member 44, the trigger block 41 resets and drives the swing block 42 to reset via the drive part 412. At this time, the drive part 412 moves from the second point 424 to the third point 425. The third elastic member 45 is in a compressed state. The limiting part 421 moves to below the limiting groove 61. When the second-to-last edge 11 of the pipe box 1 abuts against the limiting block 6, the limiting block 6 locks with the limiting part 421 under the action of gravity. The bottommost pipe box 1 disengages and descends along with the tray 31.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tube dispenser dispensing mechanism suitable for a test tube labeling and preparation machine, characterized in that: include frame; The support assembly is fixedly connected to the frame and includes at least one support frame (2), a limiting block (6) disposed on the support frame (2), and a first elastic member (43) disposed between the limiting block (6) and the support frame (2). The support frame (2) has a receiving area (7) that is vertically through and can accommodate stacked pipe boxes (1). The first elastic member (43) forces the limiting block (6) to remain horizontal and extends into the receiving area (7). The lifting assembly (3) includes a tray (31) located below the receiving area (7) and a drive unit (32) for driving the tray (31) to move vertically. The trigger assembly (4) is used to control the limit block (6) to extend into or retract into the receiving area (7). It includes a trigger plate (5) fixedly connected to the output end of the drive unit (32), and a trigger block (41) and a swing block (42) rotatably connected to the end of the support frame (2). The trigger plate (5) can abut against the end of the trigger block (41). The trigger block (41) and the swing block (42) are coupled in transmission. The swing block (42) is provided with a limiting part (421) that can abut against the bottom of the limit block (6). The limiting part (421) can restrict the rotation of the limit block (6). A second elastic element (44) is provided between the trigger block (41) and the support frame (2), and the second elastic element (44) forces the trigger block (41) to rotate toward the trigger plate (5); A third elastic element (45) is provided between the swing block (42) and the support frame (2), and the third elastic element (45) forces the swing block (42) to rotate in a direction away from the trigger plate (5); The swing block (42) is provided with a groove, and the trigger block (41) is provided with a driving part (412), which extends into the groove; The groove is provided with a first point (423), a second point (424) and a third point (425); Initial state: The connector box (1) is placed on the limit block (6), and the limit part (421) of the swing block (42) and the bottom end of the limit block (6) are locked by the action of the connector box (1), and the drive part (412) is located at the first point (423). When the trigger block (41) rotates upward: the drive unit (412) moves from the first position (423) to the second position (424), and the swing block (42) remains stationary; When the connecting box (1) is lifted to release the locking state of the limiting part (421) and the limiting block (6), the swing block (42) rotates under the action of the third elastic element (45), and at this time the drive part (412) moves from the second point (424) to the third point (425); When the trigger block (41) is reset and rotates: the drive unit (412) moves from the third position (425) to the first position (423), and the drive unit (412) drives the swing block (42) to reset and rotate.

2. The tube dispenser dispensing mechanism for a test tube labeling and preparation machine according to claim 1, characterized in that: The limiting block (6) is rotatably connected to the support frame (2). The rotation center of the limiting block (6) is denoted as point o. The contact point between the limiting block (6) and the first elastic element (43) is denoted as point a. Point a is located at one end of the limiting block (6). The contact point between the limiting block (6) and the limiting part (421) is denoted as point b. The length of the line connecting points a and o is less than or equal to the length of the line connecting points a and b.

3. The tube dispenser dispensing mechanism for a test tube labeling and preparation machine according to claim 1, characterized in that: The limiting block (6) is rotatably connected to the support frame (2). The contact point between the limiting block (6) and the first elastic element (43) and the contact point between the limiting block (6) and the limiting part (421) are located on both sides of the rotation center of the limiting block (6).

4. The tube dispenser dispensing mechanism for a test tube labeling and preparation machine according to claim 3, characterized in that: The limiting part (421) is provided with a clearance area (422). When the free end of the limiting block (6) rotates downward, the clearance area (422) can hide the end of the limiting block.

5. The tube dispenser dispensing mechanism for a test tube labeling and preparation machine according to claim 4, characterized in that: The bottom end of the limiting block (6) is provided with a limiting groove (61), and the limiting part (421) can move into the limiting groove (61).

6. The tube dispenser dispensing mechanism for a test tube labeling and preparation machine according to claim 1, characterized in that: The trigger plate (5) has at least one abutment part (51), and the end of the trigger block (41) is provided with a roller (411). The roller (411) can abut against the abutment part (51), and the end of the abutment part (51) is provided with a bent part (52).

7. A method of using a connector box dispensing mechanism, characterized in that: Specifically, the following steps are included: S1. Place the stacked pipe box (1) into the receiving area (7), place the bottom box on the limiting block (6), and raise the tray (31) to the first position to support the pipe box (1). The trigger plate (5) pushes the trigger block (41) to rotate as it rises. At this time, the limiting part (421) and the limiting block (6) are locked under the action of gravity, and the trigger component (4) is in the initial state. S2, the tray (31) continues to rise to the second position, the bottom box is lifted and disengaged from the limiting block (6), the limiting block (6) loses the effect of gravity, and is reset to a horizontal state by the torque of the first elastic member (43), the third elastic member (45) drives the swing block (42) to move in conjunction, and release the locking state between the limiting part (421) and the limiting block (6); S3. The tray (31) descends, and the gravity of the bottom box causes the limiting block (6) to rotate against the force of the first elastic element and make room. After the bottom box is disengaged, the limiting block (6) is reset and remains horizontal under the torque of the first elastic element (43). After the trigger plate (5) descends below the first position, the trigger block (41) and the swing block (42) are reset under the action of the elastic element. The limiting part (421) returns to the waiting position. The upper box falls down and presses down the limiting block (6) which remains horizontal. Its bottom is locked again by the limiting part (421), and the mechanism returns to its initial state.

Images