CN220460719U

CN220460719U - Micro-pipetting gun with replaceable gun head

Info

Publication number: CN220460719U
Application number: CN202322093410.2U
Authority: CN
Inventors: 郑丽霞
Original assignee: Guangdong Aojianyuan Biotechnology Co ltd
Current assignee: Guangdong Aojianyuan Biotechnology Co ltd
Priority date: 2023-08-05
Filing date: 2023-08-05
Publication date: 2024-02-09
Anticipated expiration: 2033-08-05

Abstract

The utility model discloses a gun head-replaceable micropipette gun, which relates to the technical field of medical equipment and comprises an external threaded pipe, wherein the inner bottom of the external threaded pipe is spliced with a hollow convex pipe communicated with the upper end face of a gun head body; the lower surface of the external thread pipe is provided with a second hole groove at the lower part in the first hole groove formed in an annular array. According to the utility model, the gun head body is convenient to rapidly disassemble and assemble through the annular edge, the limit rod, the annular clamping block, the U-shaped clamping seat, the limit hole groove and the internal thread ring, and the disassembly and assembly components are convenient to overhaul, and the tightness of the contact part of the gun head body and the external thread pipe is increased through the sealing gasket, the spring and the T-shaped rod, so that the waste of liquid is reduced.

Description

Micro-pipetting gun with replaceable gun head

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a micro-pipetting gun with a replaceable gun head.

Background

Medical personnel need take a small amount of reagent liquid in medical pathology inspection process, at present, medical personnel control micropipette ration and a small amount of extraction reagent liquid, and micropipette is the precision instrument that is used for getting 0.1 mu l ~10ml liquid volume, is the necessary instrument that sample collection and removal were got in the analysis processes such as biology, chemistry and clinical experiments, and micropipette structure is constituteed and is had: rotary operating buttons, range display, elastic suction nozzles, corrosion-resistant pistons, cavities and the like.

Through retrieving, disclosed in patent document CN217341440U is a micropipette gun convenient to change gun head, including casing, registration arm and clearance ware, the reservoir is installed to the inner wall of casing, the sleeve is installed to the bottom of casing, the registration arm is installed to the telescopic bottom, the piston is installed to the inner wall of reservoir, bellows is installed to the inner wall of piston, the transfer ware is installed to the inner wall of piston, multiunit clearance ware is installed at the top of piston. According to the utility model, the pipette gun head is quickly replaced by installing the positioning tube and the pipette head, the positioning tube is moved into the pipette head, the pipette head is rotated to drive the limiting block to move into the limiting plate, the limiting block is pushed to move into the positioning groove after entering into the limiting plate, the pipette head is quickly fixed, the positioning block is contracted to move out of the positioning groove when the pipette head is disassembled, and the pipette head can be quickly disassembled by reversely rotating the pipette head, so that the aim of quickly replacing the pipette gun head is fulfilled.

However, the following drawbacks still exist in practical use:

1. the existing micro-pipette gun with the gun head convenient to replace is convenient to replace, in the using process, the gun head of the pipette gun is quickly replaced by the locating tube and the pipette head, but the structure is complicated, components are located inside the locating tube and the pipette head, and disassembly, assembly and maintenance are inconvenient.

2. The existing micro-pipetting gun with the gun head convenient to replace is detachably connected between the sleeve and the pipetting head in the using process, but the sealing performance component between the sleeve and the pipetting head causes liquid leakage at the contact position of the sleeve and the pipetting head, so that liquid waste is increased.

Therefore, the conventional micropipette gun with a conveniently replaced gun head cannot meet the requirements in practical use, so that an improved technology is urgently needed in the market to solve the above problems.

Disclosure of Invention

The utility model aims to provide a micro-pipetting gun with a replaceable gun head, which solves the problems of inconvenient disassembly and assembly, overhauling disassembly and assembly parts and poor tightness of the traditional micro-pipetting gun with the gun head convenient to replace by arranging an annular edge, a limiting rod, an annular clamping block, a U-shaped clamping seat, a limiting hole groove, an internal thread ring, a sealing gasket, a spring and a T-shaped rod.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a micropipette gun with a replaceable gun head, which comprises an external threaded pipe, wherein the inner bottom of the external threaded pipe is inserted into a hollow convex pipe communicated with the upper end face of a gun head body; the lower surface of the external thread pipe is provided with a second hole groove in the lower part of a first hole groove formed in an annular array, a T-shaped rod connected with the lower surface of a first spring connected with the inner top of the first hole groove is positioned in the second hole groove, and the lower end surface of the T-shaped rod is connected with the upper surface of a sealing gasket arranged on the lower surface of the external thread pipe.

Further, the upper surface of the connecting bucket communicated with the upper end surface of the external thread pipe is communicated with an outer cylinder.

Further, the outer upper side wall of the outer cylinder is fixedly connected with a hook.

Further, a graduated scale is embedded in the rectangular through groove formed in the outer side of the outer cylinder.

Further, the U-shaped sliding groove formed in the annular array on the inner side wall of the outer cylinder is in sliding connection with the sliding rod fixedly connected with the outer side of the inner cylinder in the annular array, the second through hole is formed in the lower surface of the inner cylinder, and the length dimension of the inner cylinder is equal to that of the graduated scale.

Further, the lower surface of the T-shaped external thread cylinder cover in threaded connection with the upper surface of the outer cylinder is connected with a hollow connecting shaft, and the external thread cylinder cover connected with the lower end surface of the hollow connecting shaft is in threaded connection with the inner cylinder.

Further, the upper end of a push rod connected with the upper surface of a rubber piston movably arranged in the inner cylinder sequentially penetrates through a first through hole, a hollow connecting shaft and a T-shaped external thread cylinder cover which are formed in the upper surface of the external thread cylinder cover from bottom to top.

Further, a second spring connected with the upper surface of the T-shaped external thread cylinder cover is sleeved outside the push rod, and the upper surface of the second spring is connected with the lower surface of a pressing convex handle fixedly connected to the upper end surface of the push rod.

The utility model has the following beneficial effects:

according to the utility model, the annular edge, the limiting rod, the annular clamping block, the U-shaped clamping seat, the limiting hole groove and the internal thread ring are arranged, so that the quick assembly and disassembly between the gun head body and the external thread pipe are facilitated, the assembly and disassembly efficiency of the gun head body is further improved, the gun head body is further conveniently replaced, and the annular edge, the limiting rod, the annular clamping block, the U-shaped clamping seat, the limiting hole groove and the internal thread ring are externally arranged, so that the later maintenance is facilitated.

According to the utility model, the sealing gasket, the spring and the T-shaped rod are arranged, so that the sealing gasket is respectively in close contact with the lower end of the external threaded pipe and the upper end of the gun head body, the sealing performance of the contact part of the external threaded pipe and the gun head body is further improved, the leakage of liquid from the contact part of the external threaded pipe and the gun head body is further effectively prevented, and the waste of the liquid is further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a micropipette gun with a replaceable gun head;

FIG. 2 is a schematic cross-sectional view of a micropipette gun with a replaceable gun head;

FIG. 3 is an enlarged schematic view of the structure shown in FIG. 2A;

FIG. 4 is a schematic cross-sectional view of a micropipette gun with a replaceable gun head;

FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 4;

FIG. 6 is an enlarged schematic view of the structure at C in FIG. 4;

FIG. 7 is a schematic bottom view of the connection of the outer barrel, the connection bucket and the externally threaded tube;

FIG. 8 is an exploded view of the inner and outer drums.

In the drawings, the list of components represented by the various numbers is as follows:

1. an outer cylinder; 11. the connecting hopper; 12. an external threaded tube; 121. a U-shaped clamping seat; 122. limiting hole grooves; 123. a sealing gasket; 124. a first hole groove; 125. a first spring; 126. a T-bar; 127. a second hole groove; 13. an internally threaded ring; 14. a hook; 15. a graduated scale; 16. a U-shaped chute; 2. a gun head body; 21. an annular edge; 22. an annular clamping block; 23. a limit rod; 24. a hollow convex tube; 3. pressing the protruding handle; 31. a push rod; 32. a rubber piston; 33. a second spring; 4. t-shaped external thread cylinder cover; 41. a hollow connecting shaft; 42. an external thread dome; 421. a first through hole; 5. an inner cylinder; 51. a second through hole; 52. and a slide bar.

Description of the embodiments

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Examples

Referring to fig. 1 to 8, the present utility model is a micropipette with replaceable gun head, comprising an external threaded tube 12, wherein the inner bottom of the external threaded tube 12 is inserted into a hollow convex tube 24 communicated with the upper end surface of a gun head body 2, a limit rod 23 fixedly connected with the upper surface of an annular edge 21 fixedly connected with the outer side of the gun head body 2 in an annular array is inserted into a limit hole groove 122 formed in an annular array and screwed on the lower surface of an internal threaded ring 13 fixedly connected with the outer side of the external threaded tube 12, and an annular clamping block 22 fixedly connected with the outer side of the limit rod 23 is clamped with a U-shaped clamping seat 121 fixedly connected with the outer side of the external threaded tube 12 in an annular array; the lower part in the first hole groove 124 that external screw thread pipe 12 lower surface was the annular array and was seted up has seted up second hole groove 127, and the T-shaped rod 126 that the first spring 125 lower surface that the top was connected in the first hole groove 124 was connected is located the second hole groove 127 inside, and T-shaped rod 126 lower terminal surface is connected with the sealing washer 123 upper surface that sets up at external screw thread pipe 12 lower surface.

As shown in fig. 1, the upper surface of a connecting bucket 11 communicated with the upper end surface of an external threaded pipe 12 is communicated with an outer cylinder 1, and the outer side wall of the outer cylinder 1 is fixedly connected with a hook 14;

specifically, the hook 14 is used for hanging the outer cylinder 1.

As shown in fig. 1, 4, 5 and 8, a graduated scale 15 is embedded in a rectangular through groove formed in the outer side of the outer cylinder 1;

the U-shaped sliding groove 16 formed in the annular array on the inner side wall of the outer cylinder 1 is in sliding connection with the sliding rod 52 fixedly connected with the outer side of the inner cylinder 5 in the annular array, the second through hole 51 is formed in the lower surface of the inner cylinder 5, and the length dimension of the inner cylinder 5 is equal to that of the graduated scale 15;

specifically, the scale 15 is used for judging the amount of liquid in the inner cylinder 5, and the U-shaped chute 16 limits the sliding rod 52 to move only in the vertical direction, so that the forced rotation of the inner cylinder 5 is effectively avoided.

As shown in fig. 2, 4 and 5, the lower surface of a T-shaped external thread cylinder cover 4 which is in threaded connection with the upper surface of the outer cylinder 1 is connected with a hollow connecting shaft 41, and an external thread round cover 42 which is connected with the lower end surface of the hollow connecting shaft 41 is in threaded connection with the inner cylinder 5;

specifically, the T-shaped external thread cylinder cover 4 is unscrewed clockwise, the hollow connecting shaft 41 rotates clockwise, the external thread round cover 42 rotates clockwise to gradually move out of the inner cylinder 5, and the T-shaped external thread cylinder cover 4 gradually moves out of the inner cylinder 1; conversely, the T-shaped external thread cylinder cover 4 is gradually connected with the external cylinder 1 in a threaded manner, and the external thread round cover 42 is gradually connected with the internal cylinder 5 in a threaded manner.

Examples

The second embodiment differs from the first embodiment in that it further discloses: as shown in fig. 4 and 5, the upper end of a push rod 31 connected with the upper surface of a rubber piston 32 movably arranged in the inner cylinder 5 sequentially penetrates through a first through hole 421 formed in the upper surface of an external thread round cover 42, a hollow connecting shaft 41 and a T-shaped external thread cylinder cover 4 from bottom to top; the second spring 33 connected with the upper surface of the T-shaped external thread cylinder cover 4 is sleeved outside the push rod 31, and the upper surface of the second spring 33 is connected with the lower surface of the pressing convex handle 3 fixedly connected with the upper end surface of the push rod 31;

specifically, the pressing knob 3 is pressed downward, the second spring 33 is contracted, the push rod 31 is moved downward, the rubber piston 32 is moved downward, and the gas inside the inner cylinder 5 is discharged; after releasing the pressing knob 3, the contracted second spring 33 gradually expands, the push rod 31 moves upward, and the rubber piston 32 moves upward.

Specifically, the steps of using the micropipette gun with the replaceable gun head are as follows: the gun head body 2 is rotated clockwise, the annular edge 21 is rotated clockwise, the limiting rod 23 is rotated clockwise, the internal thread ring 13 is rotated clockwise and moves downwards, the limiting rod 23 rotates clockwise to drive the annular clamping block 22 to move out of the U-shaped clamping seat 121, an external force far away from the external thread pipe 12 is applied to the gun head body 2, the hollow convex pipe 24 moves out of the internal part of the external thread pipe 12, the limiting rod 23 is separated from the limiting hole groove 122 on the internal thread ring 13 to finish the disassembly of the gun head body 2, meanwhile, the sealing gasket 123 loses the upward external force applied by the gun head body 2, the compressed first spring 125 gradually stretches, the T-shaped rod 126 moves downwards along the second hole groove 127, and the sealing gasket 123 gradually breaks away from the lower surface of the external thread pipe 12; on the contrary, the sealing washer 123 is tightly contacted with the lower surface of the external threaded pipe 12 and the upper surface of the gun head body 2, and the gun head body 2 is arranged; the protruding handle 3 is pressed downwards to the second spring 33 shrink, and rubber piston 32 moves downwards, discharges the inside air of inner tube 5, inserts rifle head body 2 in the bottle that is equipped with liquid, loosens gradually and presses protruding handle 3, and the second spring 33 of shrink stretches gradually, and rubber piston 32 upwards moves, and the inside liquid of bottle passes rifle head body 2 and second through-hole 51 and gets into inside the inner tube 5, presses protruding handle 3 downwards again, discharges the inside liquid of inner tube 5.

The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification, equivalent replacement, and improvement of some of the technical features described in the foregoing embodiments are all within the scope of the present utility model.

Claims

1. The utility model provides a removable micropipette of rifle head, includes external screw thread pipe (12), its characterized in that: the inner bottom of the external thread pipe (12) is spliced with a hollow convex pipe (24) communicated with the upper end face of the gun head body (2), a limit rod (23) fixedly connected with the upper surface of an annular edge (21) fixedly connected with the outer side of the gun head body (2) in an annular array is spliced with a limit hole groove (122) formed in the lower surface of an internal thread ring (13) in the outer side of the external thread pipe (12) in an annular array in a threaded manner, and an annular clamping block (22) fixedly connected with the outer side of the limit rod (23) is clamped with a U-shaped clamping seat (121) fixedly connected with the outer side of the external thread pipe (12) in an annular array;

the lower part has seted up second hole groove (127) in first hole groove (124) that external screw tube (12) lower surface was annular array set up, T shape pole (126) that first spring (125) lower surface that top was connected in first hole groove (124) is located inside second hole groove (127), terminal surface and sealing washer (123) upper surface connection of setting at external screw tube (12) lower surface under T shape pole (126).

2. A tip-replaceable micropipette gun according to claim 1 wherein: the upper surface of a connecting hopper (11) communicated with the upper end surface of the external thread pipe (12) is communicated with an outer cylinder (1).

3. A tip-replaceable micropipette gun according to claim 2 wherein: the outer upper side wall of the outer barrel (1) is fixedly connected with a hook (14).

4. A tip-replaceable micropipette gun according to claim 3 wherein: a graduated scale (15) is embedded in the rectangular through groove formed in the outer side of the outer cylinder (1).

5. A tip-replaceable micropipette gun according to claim 4 wherein: the U-shaped sliding groove (16) formed in the inner side wall of the outer cylinder (1) in an annular array is connected with the outer side of the inner cylinder (5) in a sliding mode through a sliding rod (52) fixedly connected in an annular array, a second through hole (51) is formed in the lower surface of the inner cylinder (5), and the length dimension of the inner cylinder (5) is equal to that of the graduated scale (15).

6. The tip-replaceable micropipette of claim 5 wherein: the T-shaped external thread cylinder cover (4) is connected with the lower surface of the outer cylinder (1) in threaded connection, the hollow connecting shaft (41) is connected with the lower surface of the T-shaped external thread cylinder cover, and the external thread circular cover (42) connected with the lower end surface of the hollow connecting shaft (41) is in threaded connection with the inner cylinder (5).

7. The tip-replaceable micropipette of claim 6 wherein: the inner cylinder (5) is internally and movably provided with a first through hole (421), a hollow connecting shaft (41) and a T-shaped external thread cylinder cover (4) which are sequentially formed in a way that the upper end of a push rod (31) connected with the upper surface of a rubber piston (32) penetrates through the upper surface of an external thread cylinder cover (42) from bottom to top.

8. A tip-replaceable micropipette gun according to claim 7 wherein: a second spring (33) connected with the upper surface of the T-shaped external thread cylinder cover (4) is sleeved outside the push rod (31), and the upper surface of the second spring (33) is connected with the lower surface of a pressing convex handle (3) fixedly connected to the upper end surface of the push rod (31).