Propelling blocking card of manual microsyringe

Abstract

The utility model relates to the technical field of microscale sample injectors, in particular to a pushing blocking clamp of a manual microscale sample injector, which comprises a tube body, a handle cover is arranged at the top end of the tube body, a round hole a is arranged in the middle of the top of the handle cover, a detachable pushing blocking clamp is arranged at the top of the handle cover, and the pushing blocking clamp comprises a rectangular fixing block. A threaded hole is formed in the middle of the left side of the rectangular fixing block and internally in threaded connection with a threaded rod, and the right end of the threaded rod is rotationally connected with a moving block. According to the manual microsyringe, the left-right position of a moving block can be adjusted through a pushing blocking clamp and a threaded rod, when the moving block moves rightwards, the moving block drives a first rubber block and a second rubber block to move rightwards, so that the first rubber block and the second rubber block extrude an operating rod, and due to the fact that the first rubber block and the second rubber block have certain deformability, the operating rod is not prone to deformation; and therefore, the extrusion force on the operating rod can be adjusted, and the resistance of the operating rod during up-down movement can be adjusted to adapt to different workers.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-injectors, in particular to a propulsion resistance card of a manual micro-injector. Background Art

[0002] A microinjector is a scientific research experimental tool, usually used in chromatographic analysis. Its function is to quantitatively deliver the analytical sample into the chromatographic column. The push rod design of the microinjector is of two types: manual and automatic. The tail of the manual injection needle is larger, which makes it easier for the operator to grab the push rod when manually injecting.

[0003] The patent with announcement number CN219816296U discloses a micro-injector, including a tube body, a piston rod assembly movably inserted in the cavity of the tube body, one end of the piston rod assembly is a piston rod handle, the bottom end of the tube body is provided with an injection needle, the side of the tube body is provided with volume scales from bottom to top, the outer bottom end of the piston rod handle is provided with a scale magnifying mechanism corresponding to the volume scale, and three groups of stabilizing components are evenly spaced circumferentially at the bottom end of the tube body. The utility model can keep synchronization with the liquid level position at the bottom of the piston for instant reading without manually adjusting the position of the magnifying glass; the structure is simple and the stability during injection is improved.

[0004] When the above-mentioned prior art is in use, the staff holds the tube body to push the piston rod handle through the piston rod assembly for injection. However, when pushing the piston rod handle, it is not easy to control the advancement speed of the piston rod handle. If the staff's hand strength is large, it is easy to push the piston rod handle to move faster. Pushing too fast may cause sample overflow or impact, causing the injection volume to be out of control, thereby affecting the accuracy of the analysis result. Too fast speed may also cause excessive pressure on the hardware hierarchy, thereby causing damage to the equipment. If the staff's hand strength is small, it is not easy to push the piston rod handle to move. Although pushing too slowly will not cause damage to the hardware equipment, the impact on the sample cannot be ignored. First, too slow injection may cause the sample to volatilize during the injection process, especially some volatile substances, which will affect the accuracy and precision of the experiment. Secondly, too slow injection will increase the difficulty of experimental operation, and may cause injection failure and waste of samples due to operator errors. The resistance of the piston rod handle of the currently used manual microinjector cannot be adjusted according to needs, and there is a problem of inconvenience in use. In view of this, we propose a push-block for the manual microinjector. Utility Model Content

[0005] The utility model aims to provide a propulsion block for a manual micro-injector to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The push block of the manual micro-injector comprises a tube body, a sampling needle is arranged at the bottom end of the tube body, a volume scale is arranged on the outer surface of the tube body, a piston is slidably connected in the tube body, an operating rod is arranged on the top of the piston, a handle cover is arranged on the top end of the tube body, a circular hole a is opened in the middle of the top of the handle cover, the top end of the operating rod passes through the circular hole a and is detachably connected with a button, the button is threadedly connected to the operating rod, so that the button can be detached, so that the push block can be removed from the operating rod, and the staff presses the button, and the button drives the piston to move downward through the operating rod, so that the solution in the tube body is discharged from the sampling needle;

[0008] A detachable propulsion block is provided on the top of the handle cover, and the propulsion block includes a rectangular solid block, a circular hole b connected to the circular hole a is provided on the top and near the right side of the rectangular solid block, and the top of the operating rod passes through the circular hole b. A threaded hole is provided in the middle of the left side of the rectangular solid block, and a rectangular movable groove connected to both the threaded hole and the circular hole b is provided in the rectangular solid block. A threaded rod is threadedly connected in the threaded hole, and a moving block is rotatably connected to the right end of the threaded rod. The moving block is slidably connected in the rectangular movable groove, and a first rubber block is provided on the right side of the moving block. A second rubber block is provided on the right side of the first rubber block. The threaded rod can adjust the left and right positions of the moving block. When the moving block moves to the right, the moving block drives the first rubber block and the second rubber block to move to the right, so that the first rubber block and the second rubber block squeeze the operating rod. Since the first rubber block and the second rubber block have a certain deformation ability, the squeezing force on the operating rod can be adjusted, thereby realizing the resistance adjustment when the operating rod moves up and down to adapt to the use of different staff members.

[0009] Preferably, a first mounting ear is provided on both the front and rear sides of the rectangular solid block and at the right end of the bottom, a circular hole c is provided on the top of the first mounting ear, a bolt is movably connected in the circular hole c, and two threaded grooves are provided on the top of the handle cover, and the threaded ends of the two bolts are respectively threadedly connected in the two threaded grooves, which facilitates the disassembly and assembly of the rectangular solid block and the handle cover.

[0010] Preferably, a second mounting ear is provided at the bottom of the right side of the rectangular solid block, a circular hole d is opened at the top of the second mounting ear, a circular boss is provided at the top of the handle cover, and the circular boss is inserted into the circular hole d. After the second mounting ear is connected to the circular boss, the two circular holes c can correspond to the two threaded grooves respectively.

[0011] Preferably, an arc-shaped groove is formed on the right side of the second rubber block, and the concave surface of the arc-shaped groove abuts against the outer wall of the operating rod, thereby increasing the contact surface between the second rubber block and the operating rod, which is conducive to the second rubber block pressing the operating rod.

[0012] Preferably, a semicircular groove is provided on the inner wall of the circular hole b, and the semicircular groove is located directly to the right of the rectangular movable groove. A rubber lining is provided in the semicircular groove, and the outer wall of the operating rod is fitted with the inner wall of the rubber lining, which can improve the blocking effect in combination with the second rubber block.

[0013] Preferably, a knob is provided at the left end of the threaded rod, and an outer surface of the knob is provided with anti-slip grooves to facilitate staff to rotate the threaded rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The manual micro-injector has a push-on resistance card, and the threaded rod can adjust the left and right position of the moving block. When the moving block moves to the right, the moving block drives the first rubber block and the second rubber block to move to the right, so that the first rubber block and the second rubber block squeeze the operating rod. Since the first rubber block and the second rubber block have a certain deformation ability, the squeezing force on the operating rod can be adjusted, thereby realizing the adjustment of the resistance when the operating rod moves up and down to adapt to the use of different staff members.

[0016] 2. After the second mounting ear of the push-in block of the manual micro-injector is connected to the circular boss, the two circular holes c can correspond to the two threaded grooves respectively, and the threaded ends of the two bolts are respectively threadedly connected to the two threaded grooves, which facilitates the disassembly and assembly of the rectangular solid block and the handle cover, so that the push-in block can be replaced when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the assembly structure of the handle cover and the push-stop card in the utility model;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the propulsion resistance card in the utility model.

[0021] In the figure: 1, tube body; 2, injection needle; 3, piston; 4, operating rod; 5, button; 6, handle cover; 60, circular hole a; 61, threaded groove; 62, circular boss; 7, volume scale; 8, push-stop; 80, rectangular solid block; 800, circular hole b; 801, threaded hole; 802, rectangular movable groove; 803, semicircular groove; 81, first mounting ear; 810, circular hole c; 82, second mounting ear; 820, circular hole d; 83, bolt; 84, threaded rod; 85, moving block; 86, first rubber block; 87, second rubber block; 870, arc-shaped groove; 88, knob; 89, rubber lining. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0025] The push-up block of the manual micro-injector comprises a tube body 1, a sampling needle 2 is arranged at the bottom end of the tube body 1, a volume scale 7 is arranged on the outer surface of the tube body 1, a piston 3 is slidably connected in the tube body 1, an operating rod 4 is arranged on the top of the piston 3, a handle cover 6 is arranged on the top end of the tube body 1, a circular hole a60 is opened in the middle of the top of the handle cover 6, a button 5 is detachably connected to the top end of the operating rod 4 through the circular hole a60, and the button 5 is threadedly connected to the operating rod 4 so that the button 5 can be disassembled, so that the push-up block 8 can be removed from the operating rod 4, and the staff presses the button 5, and the button 5 drives the piston 3 to move downward through the operating rod 4, so that the solution in the tube body 1 is output from the sampling needle 2;

[0026] A detachable push-in block 8 is provided on the top of the handle cover 6, and the push-in block 8 includes a rectangular solid block 80. A circular hole b800 connected to the circular hole a60 is provided at the top of the rectangular solid block 80 and near the right side. The top of the operating rod 4 passes through the circular hole b800. A threaded hole 801 is provided in the middle of the left side of the rectangular solid block 80. A rectangular movable groove 802 connected to both the threaded hole 801 and the circular hole b800 is provided in the rectangular solid block 80. A threaded rod 84 is threadedly connected to the threaded hole 801. The right end of the threaded rod 84 is rotatably connected to a moving block 85. The moving block 85 is slidably connected to the rectangular movable groove 80 2, a first rubber block 86 is provided on the right side of the moving block 85, and a second rubber block 87 is provided on the right side of the first rubber block 86. The threaded rod 84 can adjust the left and right position of the moving block 85. When the moving block 85 moves to the right, the moving block 85 drives the first rubber block 86 and the second rubber block 87 to move to the right, so that the first rubber block 86 and the second rubber block 87 squeeze the operating rod 4. Since the first rubber block 86 and the second rubber block 87 have a certain deformation ability, the squeezing force on the operating rod 4 can be adjusted, thereby realizing the adjustment of the resistance when the operating rod 4 moves up and down, so as to adapt to the use of different staff members.

[0027] In this embodiment, a first mounting ear 81 is provided on both the front and rear sides of the rectangular solid block 80 and at the right end of the bottom. A circular hole c810 is provided on the top of the first mounting ear 81, and a bolt 83 is movably connected in the circular hole c810. Two threaded grooves 61 are provided on the top of the handle cover 6, and the threaded ends of the two bolts 83 are respectively threadedly connected in the two threaded grooves 61, which facilitates the disassembly and assembly of the rectangular solid block 80 and the handle cover 6.

[0028] Specifically, a second mounting ear 82 is provided at the bottom of the right side of the rectangular solid block 80, a circular hole d820 is opened at the top of the second mounting ear 82, a circular boss 62 is provided at the top of the handle cover 6, and the circular boss 62 is inserted into the circular hole d820. After the second mounting ear 82 is connected to the circular boss 62, the two circular holes c810 can correspond to the two threaded grooves 61 respectively.

[0029] Furthermore, an arcuate groove 870 is formed on the right side of the second rubber block 87 , and the concave surface of the arcuate groove 870 abuts against the outer wall of the operating rod 4 , thereby increasing the contact surface between the second rubber block 87 and the operating rod 4 , which is beneficial for the second rubber block 87 to press the operating rod 4 .

[0030] Furthermore, a semicircular groove 803 is provided on the inner wall of the circular hole b800, and the semicircular groove 803 is located directly to the right of the rectangular movable groove 802. A rubber lining 89 is provided in the semicircular groove 803, and the outer wall of the operating rod 4 fits with the inner wall of the rubber lining 89, which can improve the blocking effect in conjunction with the second rubber block 87.

[0031] Furthermore, a knob 88 is provided at the left end of the threaded rod 84 , and an outer surface of the knob 88 is provided with anti-slip grooves to facilitate the staff to rotate the threaded rod 84 .

[0032] When the push-up block of the manual micro-injector of this embodiment is in use, the staff rotates the knob 88 to drive the threaded rod 84 to rotate, so that the threaded rod 84 drives the moving block 85 to move rightward, and the moving block 85 drives the first rubber block 86 and the second rubber block 87 to move rightward, so that the first rubber block 86 and the second rubber block 87 squeeze the operating rod 4. Since the first rubber block 86 and the second rubber block 87 have a certain deformation ability, the squeezing force on the operating rod 4 can be adjusted, thereby realizing the adjustment of the resistance when the operating rod 4 moves up and down, so as to adapt to the use of different staff members and avoid the staff members pushing the operating rod 4 to move too fast or too slow, thereby avoiding affecting the progress of the experiment.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A push-in block for a manual micro-injector, comprising a tube body (1), a sample injection needle (2) is arranged at the bottom end of the tube body (1), a volume scale (7) is arranged on the outer surface of the tube body (1), a piston (3) is slidably connected in the tube body (1), an operating rod (4) is arranged at the top of the piston (3), and a handle cover (6) is arranged at the top end of the tube body (1), characterized in that: A circular hole a (60) is provided in the middle of the top of the handle cover (6), the top end of the operating rod (4) passes through the circular hole a (60) and is detachably connected to a button (5), a detachable push-up block (8) is provided on the top of the handle cover (6), the push-up block (8) comprises a rectangular solid block (80), a circular hole b (800) communicating with the circular hole a (60) is provided at the top and near the right side of the rectangular solid block (80), and a threaded hole (800) is provided in the middle of the left side of the rectangular solid block (80). 1), a rectangular movable groove (802) communicating with the threaded hole (801) and the circular hole b (800) is provided in the rectangular solid block (80), a threaded rod (84) is threadedly connected to the threaded hole (801), a movable block (85) is rotatably connected to the right end of the threaded rod (84), the movable block (85) is slidably connected to the rectangular movable groove (802), a first rubber block (86) is provided on the right side of the movable block (85), and a second rubber block (87) is provided on the right side of the first rubber block (86).

2. The push-on block of the manual micro-injector according to claim 1, characterized in that: The rectangular solid block (80) is provided with a first mounting ear (81) at the right end of the bottom and the front and rear sides thereof; a circular hole c (810) is provided at the top of the first mounting ear (81); a bolt (83) is movably connected in the circular hole c (810); two threaded grooves (61) are provided at the top of the handle cover (6); the threaded ends of the two bolts (83) are respectively threadedly connected in the two threaded grooves (61).

3. The push-on block of the manual micro-injector according to claim 1, characterized in that: A second mounting ear (82) is provided at the bottom of the right side of the rectangular solid block (80), a circular hole d (820) is opened at the top of the second mounting ear (82), and a circular boss (62) is provided at the top of the handle cover (6), and the circular boss (62) is inserted into the circular hole d (820).

4. The push-on block of the manual micro-injector according to claim 1, characterized in that: An arc-shaped groove (870) is provided on the right side of the second rubber block (87), and the concave surface of the arc-shaped groove (870) abuts against the outer wall of the operating rod (4).

5. The push-up block of the manual micro-injector according to claim 1, characterized in that: The inner wall of the circular hole b (800) is provided with a semicircular groove (803), and the semicircular groove (803) is located right to the rectangular movable groove (802). A rubber lining (89) is provided in the semicircular groove (803), and the outer wall of the operating rod (4) is in contact with the inner wall of the rubber lining (89).

6. The push-up block of the manual micro-injector according to claim 1, characterized in that: A knob (88) is provided at the left end of the threaded rod (84), and an outer surface of the knob (88) is provided with anti-slip grooves.

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