A gun head movement mechanism

Abstract

The utility model discloses a gun head movement mechanism, it includes the gun head body for the connection tip head, the gun head sliding sleeve, the movable sleeve is established in the gun head body outside, the drive assembly is used for driving the gun head body and carries out the up and down movement, the limiting component is used for limiting the gun head sliding sleeve, the utility model discloses the sleeve of gun head sliding sleeve is established in the gun head body, when will tip head from the gun head body, the drive assembly drives the gun head body and moves upward, the gun head sliding sleeve is limited under the limiting component, and the gun head sliding sleeve stops and moves upward, thereby makes tip head and the gun head body of continuing to move upward separate, simple structure, realizes the separation operation of gun head body and tip head, can avoid the operation positioning limitation and the defect of uncontrolled falling trajectory when tip head is withdrawn.

Description

Technical Field

[0001] This utility model relates to the field of biotechnology, and in particular to a gun head movement mechanism. Background Technology

[0002] As a measuring tool that uses the principle of air displacement to transfer liquid from one container to another within a certain range, pipettes are widely used in fields such as medicine and health, environmental monitoring, food safety, and fine chemicals. They are a common tool for quantitative analysis in various research institutes and laboratories.

[0003] In routine pipette operation, tip removal is a crucial step to ensure smooth sample processing, prevent cross-contamination, and maintain stable equipment operation. Currently, the most common method for tip removal in the industry involves moving the pipette to a preset fixed mounting position via a motion platform, then using a Z-axis drive mechanism to raise the adapter. When the adapter raises the tip to a specific height, the mounting structure prevents further upward movement, causing the tip to detach from the pipette. This method requires strict control of the operating position, and the tip's detachment posture (such as tilt angle or horizontal displacement) is uncontrollable, posing a risk of contaminating the mounting position or interfering with other mechanisms.

[0004] Therefore, it is urgent to propose a gun head movement mechanism to solve the problem. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a gun head movement mechanism with a simple structure that realizes the automatic separation of the gun head and the tip head, and can avoid the defects of limited positioning and uncontrollable falling trajectory when the tip head is removed.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a gun head moving mechanism, which includes:

[0007] The nozzle body is used to connect the tip connector;

[0008] The gun head slide is movably fitted onto the outside of the gun head body;

[0009] A drive component is used to drive the gun head body to move up and down;

[0010] A limiting component is used to limit the movement of the gun head slide sleeve;

[0011] When the tip is detached from the gun head body, the driving component drives the gun head body and the gun head slide to move upward together; after the gun head slide is restricted by the limiting component, it stops moving upward, while the gun head body continues to move upward, thereby realizing the separation of the tip and the gun head body.

[0012] Furthermore, the gun head body is provided with a docking gun head, which is located inside the gun head slide sleeve, and the lower end of the docking gun head extends from the bottom end of the gun head slide sleeve for mating with the tip head; a limiting groove is formed on one side of the gun head slide sleeve, and the limiting component pops out a limiting block to embed the limiting block into the limiting groove.

[0013] Furthermore, a through hole is provided at the center of the lower half of the gun head slide, through which the docking gun head passes, and the diameter of the through hole is smaller than the cross-sectional diameter of the upper end of the tip head.

[0014] Furthermore, the gun head body is provided with a limiting protrusion, and a positioning groove is provided on one side of the gun head slide, with the limiting protrusion placed in the positioning groove.

[0015] Furthermore, the gun head body includes a fixed base, the docking gun head is mounted on the fixed base, the fixed base has a through hole, the upper end of the docking gun head is mounted on one end of the through hole, and the other end of the through hole is used to connect to the suction and discharge assembly.

[0016] Furthermore, a first elastic element is provided between the lower end of the fixed base and the gun head slide sleeve, and the docking gun head passes through the first elastic element.

[0017] Furthermore, a positioning sensor is provided on one of the gun head body and the gun head sliding sleeve. The positioning sensor is used to sense whether the tip head is successfully assembled with the docking gun head. A baffle is provided on the other of the gun head body and the gun head sliding sleeve.

[0018] Furthermore, the gun head movement mechanism also includes a base, and the drive assembly includes a first slide rail, a first slide block, and a first drive member. The first slide rail is fixed on the base, the first slide block is engaged on the first slide rail, the gun head body is fixed on the first slide block, and the first drive member is used to drive the first slide block to slide back and forth along the direction of the first slide rail, thereby realizing the movement effect of the gun head body along the Z-axis direction.

[0019] Furthermore, the limiting component is disposed on one side of the gun head slide sleeve, and the limiting component also includes a limiting seat. The limiting seat has a guide groove facing the gun head slide sleeve side. The limiting block is placed in the guide groove. The limiting block is controlled by the driving mechanism to pop out of the guide groove or retract into the guide groove.

[0020] Furthermore, the driving mechanism includes a limiting post disposed in the guide groove, a second elastic member connected to the limiting post, a pushing block protruding from one side of the limiting block, and a pushing member disposed on one side of the pushing block;

[0021] The limiting block has a receiving groove, the limiting post is placed in the receiving groove, and the second elastic member is placed between the limiting post and the groove wall of the receiving groove to provide the power required for the limiting block to reset.

[0022] The base is provided with a Z-axis drive mechanism, and the pusher is disposed on the Z-axis drive mechanism. The Z-axis drive mechanism is used to drive the pusher to move up and down along the Z-axis direction. One side of the pusher block is provided with a beveled part. Under the drive of the Z-axis drive mechanism, the pusher fits against the beveled part and applies a force to the beveled part, so that the limiting block moves along the guide groove direction to the outside of the guide groove.

[0023] In summary, this utility model provides a gun head movement mechanism by using a gun head sliding sleeve over the gun head body. When the tip is detached from the gun head body, the drive component moves the gun head body and the gun head sliding sleeve upwards together. Once the gun head sliding sleeve is restricted by the limiting component, it stops moving upwards, while the gun head body continues to move upwards, thus achieving the separation of the tip and the gun head body. This design is simple in structure. Compared with traditional tip removal methods, this utility model does not require an external mounting structure to fix the tip in position. Through the cooperation of the gun head sliding sleeve and the limiting component, the gun head sliding sleeve is restricted by the limiting component and cannot continue to move upwards with the gun head body. When the upper end of the tip contacts the lower end of the gun head sliding sleeve, precise braking is triggered, thus ensuring that the tip falls vertically directly below the gun head body with minimal positional deviation. This avoids the defects of limited operation positioning and uncontrollable detachment trajectory during tip removal. In addition, driven by the drive component, the segmented motion control method during the tip removal process effectively reduces impact force and significantly reduces mechanical wear. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the combination of a gun head movement mechanism and a tip head according to the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a gun head movement mechanism according to the present invention;

[0026] Figure 3 This is an exploded view of the structure of the gun head movement mechanism of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the gun head motion mechanism of this utility model after concealing the Z-axis drive mechanism;

[0028] Figure 5 This is a schematic diagram of the structure of the gun head slide sleeve of this utility model;

[0029] Figure 6This is a schematic diagram of the combination of the fixed base and the first slide of this utility model;

[0030] Figure 7 This is an exploded view of the limiting component of this utility model.

[0031] Explanation of key component symbols:

[0032] 100. Gun head movement mechanism; 101. Position sensor; 102. Baffle plate;

[0033] 10. Gun head body; 11. Connecting gun head; 111. Long rod; 112. Ball head; 1121. First annular protrusion; 1111. Second annular protrusion; 12. Limiting protrusion; 13. Fixing base; 131. Through hole; 14. Suction and discharge assembly; 15. First elastic element;

[0034] 20. Gun head slide; 21. Limiting groove; 22. Through hole; 23. Positioning groove;

[0035] 30. Drive assembly; 31. First slide rail; 32. First slide block; 33. First drive component; 331. First drive motor; 332. First drive rod;

[0036] 40. Limiting component; 41. Limiting block; 411. Pushing block; 4111. Angled surface; 412. Receiving groove; 42. Limiting seat; 421. Guide groove; 43. Limiting post; 44. Second elastic element; 45. Pushing element;

[0037] 50. Base; 51. Fixing plate; 52. Support plate; 53. Threaded groove;

[0038] 60. Z-axis drive mechanism; 61. Second slide rail; 62. Second slide block; 63. Second drive component; 631. Second drive motor; 632. Second drive rod;

[0039] 200, tip header. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] like Figure 1 As shown, this utility model provides a pipetting device, including a driving device (not shown) and a pipette tip movement mechanism 100. The driving device is connected to the pipette tip movement mechanism 100 for transmission. The pipette tip movement mechanism 100 is used to mate with a tip 200. The driving device can drive the pipette tip movement mechanism 100 to move the tip 200 between different positions to achieve liquid transfer.

[0044] like Figures 1 to 7As shown, the nozzle movement mechanism 100 includes a nozzle body 10, a nozzle slide 20, a drive assembly 30, and a limiting assembly 40. The nozzle body 10 is used to mate with the tip 200. The nozzle slide 20 is movably fitted over the nozzle body 10. The drive assembly 30 is used to drive the nozzle body 10 to move up and down, so as to drive the tip 200 downward to be delivered into the test liquid in the reagent tube or to drive the tip 200 upward to detach from the reagent tube. The limiting assembly 40 is used to limit the nozzle slide 20. When the tip 200 is detached from the nozzle body 10, the drive assembly 30 drives the nozzle body 10 and the nozzle slide 20 upward together. After the nozzle slide 20 is limited by the limiting assembly 40, it stops moving upward, while the nozzle body continues to move upward, thereby realizing the movement of the tip 200. Compared to traditional tip removal methods, the separation operation of the IP head 200 from the gun head body 10 does not require an external mounting structure to fix the tip head in place. Through the cooperation of the gun head sliding sleeve 20 and the limiting component 40, the gun head sliding sleeve 20 is prevented from continuing to move upwards with the gun head body 10 after being restricted by the limiting component 40. Precise braking is triggered when the upper end of the tip head 200 contacts the lower end of the gun head sliding sleeve 20, thus ensuring that the tip head 200 falls vertically directly below the gun head body 10 with minimal positional deviation. This avoids the limitations of positioning and uncontrollable detachment trajectories during tip removal. Furthermore, driven by the drive component 30, a segmented motion control method is used during the tip head 200 detachment process to effectively reduce impact force and significantly reduce mechanical wear.

[0045] In one embodiment, the gun head body 10 is provided with a docking gun head 11, which is located inside the gun head slide 20. The lower end of the docking gun head 11 can extend out from the bottom end of the gun head slide 20. The docking gun head 11 is used to mate with the tip head 200. A limiting groove 21 is formed on one side of the gun head slide 20 in the vertical direction. The limiting component 40 pops out the limiting block 41, so that the limiting block 41 is embedded in the limiting groove 21. When the tip head 200 is detached from the gun head body 10, the driving component 30 drives the gun head body 10 and the gun head slide 20 to move upward together. When the lower groove wall of the gun head slide 20 contacts the limiting block 41, the gun head slide 20 stops moving upward under the restriction of the limiting block 41, while the docking gun head 11 continues to move upward, thereby realizing the connection between the tip head 200 and the tip head 200. Compared to traditional tip removal methods, the separation operation from the docking gun head 11 does not require an external mounting structure to fix the tip head in position. Instead, the gun head sliding sleeve 20, in cooperation with the limiting component 40, prevents the sliding sleeve 20 from continuing to move upwards with the docking gun head 11. Precise braking is triggered when the upper end of the tip head 200 contacts the lower end of the sliding sleeve 20, ensuring that the tip head 200 falls vertically directly below the docking gun head 11 with minimal positional deviation. This avoids the limitations of positioning and uncontrollable detachment trajectories during tip removal. Furthermore, driven by the drive component 30, a segmented motion control method is used during the tip head 200 detachment process to effectively reduce impact and significantly decrease mechanical wear.

[0046] Specifically, the docking gun head 11 includes a long rod 111 and a ball head 112. The ball head 112 is fixed to the lower end of the long rod 111. When the ball head 112 is inserted into the upper end of the tip head 200, the tip head 200 is engaged with the docking gun head 11. The upper end of the ball head 112 is provided with a first annular protrusion 1121, and the long rod 111 above the ball head 112 is provided with a second annular protrusion 1111. The first annular protrusion 1121 and the second annular protrusion 1111 are used to help fix the tip head 200, making the engagement between the tip head 200 and the docking gun head 11 more secure. The first annular protrusion 1121 and the second annular protrusion 1111 can be designed to match the upper end of the tip head 200, so that the tip head 200 will not fall off after being engaged with the docking gun head 11.

[0047] Furthermore, a through hole 22 is provided at the center of the lower half of the gun head slide 20. The docking gun head 11 is set through the through hole 22. In order to make the docking gun head 11 disengage from the tip head 200 when it moves upward, the diameter of the through hole 22 must be smaller than the cross-sectional diameter of the upper end of the tip head 200, so that the tip head 200 is blocked outside the through hole 22, and the separation operation of the gun head body 10 and the tip head 200 can be successfully realized.

[0048] In one embodiment, a limiting protrusion 12 is provided on the gun head body 10, and a positioning groove 23 is provided on one side of the gun head slide 20. The limiting protrusion 12 is placed in the positioning groove 23. In the initial state, the limiting protrusion 12 is fitted against the upper groove wall of the positioning groove 23. The limiting protrusion 12 applies an upward force to the gun head slide 20, thereby enabling the gun head body 10 to achieve a supporting effect on the gun head slide 20, and preventing the gun head slide 20 from detaching from the gun head body 10 due to lack of support, which would affect the quality of the instrument.

[0049] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the nozzle body 10 includes a fixed base 13, a limiting protrusion 12 is provided on one side of the fixed base 13, and the docking nozzle 11 is snapped onto the fixed base 13. Specifically, the fixed base 13 has a through hole 131, the upper end of the docking nozzle 11 is snapped onto one end of the through hole 131, and the other end of the through hole 131 is used to connect to the suction and discharge assembly 14. The suction and discharge assembly 14 is connected to the through hole 131 through a pipe. The suction and discharge assembly 14 uses piston movement to make the nozzle body 10 cooperate with the tip head 200 to realize the liquid suction and discharge operation. The suction and discharge assembly 14 itself does not involve the inventive point of this utility model, and will not be described in detail here. It can be obtained by purchasing or manufacturing using existing technology.

[0050] Alternatively, the gun head body 10 includes a suction and discharge assembly 14, with the docking gun head 11 being snapped onto the suction and discharge assembly 14. The drive assembly 30 is used to drive the suction and discharge assembly 14 to move up and down, thereby causing the gun head body 10 to move up and down synchronously. The gun head sliding sleeve 20 is slidably sleeved on the outside of the suction and discharge assembly 14.

[0051] In one embodiment, the upper end of the gun head slide 20 has a U-shaped cross-section. A first elastic element 15 is provided between the lower end of the fixing seat 13 and the upper end of the through hole 22 in the gun head slide 20. The cross-sectional diameter of the first elastic element 15 is larger than that of the through hole 22. The docking gun head 11 is disposed through the first elastic element 15. When the limiting block 41 limits the gun head slide 20, relative sliding occurs between the gun head slide 20 and the docking gun head 11, causing the first elastic element 15 to be in a compressed state. When the limiting block 41 does not limit the gun head slide 20, the gun head slide 20 returns to its initial position under the restoring force of the first elastic element 15, that is, the limiting protrusion 12 is fitted with the upper groove wall of the positioning groove 23. In addition, the docking gun head 11 is disposed through the first elastic element 15 so that the first elastic element 15 limits the periphery of the docking gun head 11, avoiding unnecessary friction between the docking gun head 11 and the inner wall of the gun head slide 20, which would affect the service life of the instrument.

[0052] In one embodiment, a positioning sensor 101 is provided on one of the gun head body 10 and the gun head slide 20. The positioning sensor 101 is used to sense whether the tip 200 is successfully assembled with the docking gun head 11. A baffle 102 is provided on the other of the gun head body 10 and the gun head slide 20. In the initial state, there is a certain gap between the positioning sensor 101 and the baffle 102. When it is necessary to assemble the tip 200 with the docking gun head 11, the drive component 30 drives the gun head body 10 to move downward, and simultaneously drives the gun head slide 20 to move downward, until the gun head slide 20... The bottom end perforation 22 of the tip head 200 is attached to the upper end of the tip head 200. At this time, the tip head slide 20 is blocked by the tip head 200 and stops moving downward. The tip head body 10 continues to move downward under the drive of the drive component 30, so that the tip head body 10 and the tip head slide 20 slide relative to each other. After the positioning sensor 101 and the baffle 102 collide, the positioning sensor 101 signal is triggered. At this time, it can be considered that the tip head 200 and the docking tip head 11 are successfully assembled. In this embodiment, the positioning sensor 101 is set on the tip head slide 20 and the baffle 102 is set on the fixed base 13.

[0053] In one embodiment, the gun head movement mechanism 100 further includes a base 50, on which a fixing plate 51 is provided. The drive assembly 30 includes a first slide rail 31, a first slide block 32, and a first drive member 33. The first slide rail 31 is fixed on the fixing plate 51, the first slide block 32 is engaged on the first slide rail 31, and the gun head body 10 is fixed on the first slide block 32. Specifically, the fixing base 13 is connected and fixed to the first slide block 32, and the first drive member 33 is used to drive the first slide block 32 to slide back and forth along the direction of the first slide rail 31, thereby realizing the movement effect of the gun head body 10 along the Z-axis direction. In this embodiment, the fixing base 13 and the first slide block 32 are integrally formed.

[0054] Specifically, the first driving component 33 includes a first driving motor 331 and a first driving rod 332. The first driving motor 331 is fixed on the fixed plate 51. A support plate 52 is provided at one end of the fixed plate 51. The first driving rod 332 is a lead screw structure. One end of the first driving rod 332 is connected to the output end of the first driving motor 331, and the other end of the first driving rod 332 is fixed on the support plate 52 by a bearing. The first driving rod 332 is connected to the first slide block 32 by a thread. When the first driving motor 331 drives the first driving rod 332 to rotate, the first slide block 32 slides back and forth along the direction of the first slide rail 31 under the action of the first driving rod 332. Since the gun head body 10 is fixed on the first slide block 32, the gun head body 10 can move along the Z-axis.

[0055] In one embodiment, the limiting component 40 is disposed on one side of the gun head slide 20. The limiting component 40 also includes a limiting seat 42. The limiting seat 42 has a guide groove 421 on the side facing the gun head slide 20. The limiting block 41 is placed in the guide groove 421. The limiting block 41 is controlled by the driving mechanism to pop out from the guide groove 421 or retract into the guide groove 421, thereby achieving the limiting effect on the gun head slide 20.

[0056] Specifically, the driving mechanism includes a limiting post 43 disposed in the guide groove 421, a second elastic member 44 connected to the limiting post 43, a pushing block 411 protruding from one side of the limiting block 41, and a pushing member 45 disposed on one side of the pushing block 411. The pushing member 45 pushes the pushing block 411 to move the limiting block 41 along the direction of the guide groove 421 to the outside of the guide groove 421, so as to achieve the limiting effect on the holster slide. A receiving groove 412 is provided on the limiting block 41, the limiting post 43 is placed in the receiving groove 412, and the second elastic member 44 is placed between the limiting post 43 and the groove wall of the receiving groove 412 to provide the power required for the limiting block 41 to reset.

[0057] In this embodiment, the limiting seat 42 is fixedly mounted on the base 50 and is located on one side of the limiting groove 21 on the gun head slide 20. The limiting post 43 passes through the limiting seat 42 and extends into the receiving groove 412. The limiting post 43 is a bolt structure. A Z-axis drive mechanism 60 is provided on the base 50. The pushing member 45 is mounted on the Z-axis drive mechanism 60. The Z-axis drive mechanism 60 is used to drive the pushing member 45 to move up and down along the Z-axis direction. A beveled part 4111 is provided on one side of the pushing block 411. Under the drive of the Z-axis drive mechanism 60, the pushing member 45 fits against the beveled part 4111 and applies force to the beveled part 4111, so that the limiting block 41 moves along the guide groove 421 direction to the outside of the guide groove 421, so as to achieve the limiting effect on the gun head slide 20. At this time, the second elastic member 44 is in a compressed state. When the tip 200 is detached from the gun head body 10, the pushing member 45 moves up and down along the Z-axis drive mechanism 60. Driven by mechanism 60, the pusher block 41 moves away from the inclined surface 4111, and the limiting block 41 retracts into the guide groove 421 under the restoring force of the second elastic member 44. Taking the inclined surface 4111 of the pusher block 411 facing downward as an example, the Z-axis drive mechanism 60 drives the pusher 45 to move upward and fit against the inclined surface 4111. Under the pushing action of the pusher 45, the pusher 45 applies a force to the inclined surface 4111, causing the limiting block 41 to move along the direction of the guide groove 421 and protrude out of the guide groove 421. When the tip 200 is detached from the gun head body 10, the pusher 45 moves downward and away from the inclined surface 4111 under the drive of the Z-axis drive mechanism 60, and the limiting block 41 retracts into the guide groove 421 under the restoring force of the second elastic member 44. In this embodiment, the Z-axis drive assembly does not involve the inventive point of this utility model and can be obtained by purchase or simple manufacturing, so it will not be described in detail here.

[0058] Alternatively, the drive mechanism can be designed as an electromagnet or a drive cylinder. The electromagnet or the drive cylinder is used to control the pop-out or retraction of the limit block 41. Taking the drive mechanism as an electromagnet as an example, when the electromagnet is energized in one direction, it generates magnetism, causing the limit block 41 to be pushed out due to the repulsion of like poles. When the electromagnet is energized in the opposite direction, it generates opposite magnetism, causing the limit block 41 to be retracted due to the attraction of opposite poles. Taking the drive mechanism as a drive cylinder as an example, the drive cylinder is connected to the limit block 41 through a connecting rod. The drive cylinder drives the connecting rod to perform telescopic movement, thereby controlling the pop-out or retraction operation of the limit block 41.

[0059] In one embodiment, the Z-axis drive mechanism 60 includes a second slide rail 61, a second slide block 62, and a second drive member 63. The second slide rail 61 is placed on the base 50, the second slide block 62 is slidably disposed on the second slide rail 61, the push member 45 is disposed on the second slide block 62, and the second drive member 63 is used to drive the second slide block 62 to slide back and forth along the direction of the second slide rail 61, thereby realizing the motion effect of the push member 45 along the Z-axis direction.

[0060] Specifically, the second driving component 63 includes a second driving motor 631 and a second driving rod 632. The second driving motor 631 is fixed on the second slide block 62, and the second driving rod 632 is connected to the output end of the second driving motor 631. The second driving rod 632 is a lead screw structure, and a threaded groove 53 is provided on the base 50. The second driving rod 632 is engaged in the threaded groove 53 and is connected to the base 50 by a thread. When the second driving motor 631 drives the second driving rod 632 to rotate, the second driving rod 632 moves back and forth in the up and down direction, thereby driving the second driving motor 631 to move back and forth in the Z-axis direction. Since the second driving motor 631 is fixedly connected to the second slide block 62, the second slide block 62 moves back and forth in the direction of the second slide rail 61, thereby realizing the movement effect of the pushing component 45 in the Z-axis direction.

[0061] When the present invention requires the fitting of a tip 200 to the docking gun head 11, the driving device moves the gun head movement mechanism 100 above the tip 200 supply device. The driving component 30 drives the gun head body 10 downward and simultaneously drives the gun head slide 20 downward until the bottom end hole 22 of the gun head slide 20 is in contact with the upper end of the tip 200. At this point, the gun head slide 20 stops moving downward due to the obstruction of the tip 200, and the gun head body 10 continues to move downward under the drive of the driving component 30. The movement allows the lower end of the docking gun head 11 to be securely docked with the upper end of the tip head 200. At this time, there is a certain distance between the limiting protrusion 12 and the upper wall of the positioning groove 23, which provides a certain buffer space for the subsequent separation of the docking gun head 11 and the tip head 200. In addition, the connection between the lower end of the docking gun head 11 and the upper end of the tip head 200 forms a support effect on the gun head slide sleeve 20, which can prevent the gun head slide sleeve 20 from detaching from the gun head body 10 without the support of the limiting protrusion 12, thus affecting the quality of the instrument.

[0062] When the tip 200 needs to be detached from the docking gun head 11, the drive assembly 30 drives the gun head body 10 to move upward, and simultaneously drives the gun head sliding sleeve 20 to move upward. At this time, the limiting assembly 40 pops out the limiting block 41 and places the limiting block 41 in the limiting groove 21. The gun head sliding sleeve 20 continues to move upward with the movement of the gun head body 10, so that the lower groove wall of the limiting groove 21 contacts the limiting block 41. Under the limiting action of the limiting block 41, the gun head sliding sleeve 20 stops moving upward, and the upper end of the tip 200 also stops moving upward synchronously after being limited by the gun head sliding sleeve 20. Since there is a certain distance between the limiting protrusion 12 and the upper groove wall of the positioning groove 23, the gun head body 10 is not restricted by the upper groove wall of the positioning groove 23 and continues to move upward under the drive of the drive assembly 30, thereby allowing the gun head body 10 and the tip 200 to detach from the docking gun head 11. A relative displacement is generated between 00 and 00, thereby achieving the effect of detaching the tip 200 from the docking gun head 11. Compared with the traditional tip removal method, this utility model does not require an external hanging structure to fix the tip position. Through the cooperation of the gun head sliding sleeve 20 and the limiting component 40, the gun head sliding sleeve 20 is restricted by the limiting component 40 and cannot continue to move upward with the gun head body 10. When the upper end of the tip 200 contacts the lower end of the gun head sliding sleeve 20, a precise braking is triggered, thereby ensuring that the tip 200 falls vertically to directly below the gun head body 10 with minimal positional deviation. This avoids the defects of operation positioning limitations and uncontrollable detachment trajectory during tip removal. In addition, driven by the drive component 30, a segmented motion control method is used during the detachment of the tip 200 to effectively reduce the impact force and significantly reduce mechanical wear.

[0063] In summary, the gun head movement mechanism 100 of this utility model, by using a gun head sliding sleeve 20 outside the gun head body 10, allows the gun head body 10 to move upward when the tip 200 is detached from it by the drive component 30. The sliding sleeve 20 stops moving upward under the constraint of the limiting component 40, thus separating the tip 200 from the continuing upward movement of the gun head body 10. This simple structure achieves automatic separation of the gun head body 10 and the tip 200. Compared to traditional tip removal methods, this utility model eliminates the need for an external mounting structure to fix the tip's position. By cooperating with the limiting component 40, the gun head slide 20 is restricted by the limiting component 40 and cannot continue to move upward with the gun head body 10. When the upper end of the tip 200 contacts the lower end of the gun head slide 20, precise braking is triggered, thereby ensuring that the tip 200 falls vertically to the bottom of the gun head body 10 with minimal positional deviation. This avoids the defects of limited operation positioning and uncontrollable falling trajectory when removing the tip. In addition, driven by the drive component 30, the segmented motion control method is used during the removal of the tip 200 to effectively reduce the impact force and significantly reduce mechanical wear.

[0064] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A gun head movement mechanism, characterized in that, include: The nozzle body is used to connect the tip connector; The gun head slide is movably fitted onto the outside of the gun head body; A drive component is used to drive the gun head body to move up and down; A limiting component is used to limit the movement of the gun head slide sleeve; When the tip is detached from the gun head body, the drive assembly drives the gun head body and the gun head slide to move upward together; Once the gun head slide is restricted by the limiting component, it stops moving upward, while the gun head body continues to move upward, thereby achieving the separation of the tip head from the gun head body.

2. The gun head movement mechanism according to claim 1, characterized in that, The gun head body is provided with a docking gun head, which is located inside the gun head slide sleeve, and the lower end of the docking gun head extends from the bottom end of the gun head slide sleeve for mating with the tip head; a limit groove is opened on one side of the gun head slide sleeve, and the limit component pops out a limit block to make the limit block embed into the limit groove.

3. The gun head movement mechanism according to claim 2, characterized in that, A through hole is provided at the center of the lower half of the gun head slide, and the docking gun head passes through the through hole. The diameter of the through hole is smaller than the cross-sectional diameter of the upper end of the tip head.

4. The gun head movement mechanism according to claim 1, characterized in that, The gun head body is provided with a limiting protrusion, and a positioning groove is opened on one side of the gun head slide, with the limiting protrusion placed in the positioning groove.

5. A gun head movement mechanism according to claim 2, characterized in that, The gun head body includes a fixed base, the docking gun head is fixed on the fixed base, the fixed base has a through hole, the upper end of the docking gun head is fixed at one end of the through hole, and the other end of the through hole is used to connect to the suction and discharge assembly.

6. The gun head movement mechanism according to claim 5, characterized in that, A first elastic element is provided between the lower end of the fixed base and the gun head slide sleeve, and the docking gun head passes through the first elastic element.

7. The gun head movement mechanism according to claim 2, characterized in that, A positioning sensor is provided on one of the gun head body and the gun head slide sleeve. The positioning sensor is used to sense whether the tip head is successfully assembled with the docking gun head. A baffle is provided on the other of the gun head body and the gun head slide sleeve.

8. The gun head movement mechanism according to claim 2, characterized in that, The gun head movement mechanism also includes a base, and the drive assembly includes a first slide rail, a first slide block and a first drive member. The first slide rail is fixed on the base, the first slide block is locked on the first slide rail, the gun head body is fixed on the first slide block, and the first drive member is used to drive the first slide block to slide back and forth along the direction of the first slide rail, thereby realizing the movement effect of the gun head body along the Z-axis direction.

9. A gun head movement mechanism according to claim 8, characterized in that, The limiting component is disposed on one side of the gun head slide sleeve. The limiting component also includes a limiting seat. The limiting seat has a guide groove on the side facing the gun head slide sleeve. The limiting block is placed in the guide groove. The limiting block is controlled by a driving mechanism to pop out of the guide groove or retract into the guide groove.

10. A gun head movement mechanism according to claim 9, characterized in that, The driving mechanism includes a limiting post disposed in the guide groove, a second elastic member connected to the limiting post, a pushing block protruding from one side of the limiting block, and a pushing member disposed on one side of the pushing block; The limiting block has a receiving groove, the limiting post is placed in the receiving groove, and the second elastic member is placed between the limiting post and the groove wall of the receiving groove to provide the power required for the limiting block to reset. The base is provided with a Z-axis drive mechanism, and the pusher is disposed on the Z-axis drive mechanism. The Z-axis drive mechanism is used to drive the pusher to move up and down along the Z-axis direction. One side of the pusher block is provided with a beveled part. Under the drive of the Z-axis drive mechanism, the pusher fits against the beveled part and applies a force to the beveled part, so that the limiting block moves along the guide groove direction to the outside of the guide groove.

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