CN219273097U

CN219273097U - Eight-channel pipetting gun

Info

Publication number: CN219273097U
Application number: CN202320653221.3U
Authority: CN
Inventors: 刘家朋
Original assignee: Beiyisheng Intelligent Technology Suzhou Co ltd
Current assignee: Beiyisheng Intelligent Technology Suzhou Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-06-30
Anticipated expiration: 2033-03-29

Abstract

The utility model relates to the technical field of laboratory automation, and discloses an eight-channel pipetting gun which comprises a flat gun body, wherein a row of eight gun heads are hermetically arranged below the gun body, a push-pull plate is arranged in the gun body through a guide rod, return springs are arranged on the guide rod, the push-pull rod is arranged above the push-pull plate, eight piston rods are respectively arranged below the push-pull plate, the piston rods are cooperatively arranged in the gun heads, a cavity is formed in the middle of the push-pull plate, a clamping groove is formed below the push-pull plate, the upper end of each piston rod is a clamping head, the clamping head is clamped in the clamping groove, the clamping head and the cavity form clearance fit, a ball head pin is arranged above the push-pull plate, a ball head of the ball head pin is ejected out by an internal spring, the ball head is positioned above the clamping head, and the ball head is in contact with an elastic point of the clamping head. The utility model automatically adjusts the position of the piston in the gun head, and ensures the accuracy of liquid suction and liquid injection.

Description

Eight-channel pipetting gun

Technical Field

The utility model relates to the technical field of laboratory automation, in particular to an eight-channel pipette.

Background

In the liquid treatment work of biochemical automation equipment, the multi-channel simultaneous liquid injection operation is carried out on the pore plate and the container through eight rows of guns.

For example, chinese patent 'liquid injection and discharge gun' (application number: 2022219903753), the disclosed discharge gun drives 8 pistons through a driving seat to simultaneously perform liquid suction and liquid injection at a gun head. Because the number of the piston rods is large, the parallelism cannot be perfect, so that the pistons and the movements of a plurality of gun heads are not in the same straight line with the axes of the gun heads, and when the liquid is injected, the operation precision is directly affected by the deviation because the quantity of the injected liquid is trace.

Disclosure of Invention

The utility model aims to solve the problems and provide the eight-channel pipetting gun which can automatically adjust the position of a piston in a gun head and ensure the accuracy of pipetting and pipetting.

The technical scheme adopted by the utility model is as follows:

the utility model provides an eight passageway liquid-transfering gun, its characterized in that includes the flat rifle body, and the rifle body below seals and sets up a row of eight rifle heads, sets up the push-and-pull board through the guide bar in the rifle body, sets up return spring on the guide bar, the push-and-pull board top sets up the push-and-pull rod, and the push-and-pull board below is established respectively and is set up eight piston rods, the piston rod cooperation sets up in the rifle head, form the cavity in the middle of the push-and-pull board, the lower side forms the draw-in groove, the upper end of piston rod is the dop, the dop card is established in the draw-in groove, and dop and cavity form clearance fit, and the top of push-and-pull board sets up the bulb round pin, and the bulb of bulb round pin is ejecting by inside spring, and the bulb is located the dop elasticity point contact.

Further, the guide rods are positioned on the front side and the rear side of the gun body and staggered by a distance in the left-right direction.

Further, the upper end of the gun head is provided with a sealing pressing plate, eight through holes are formed in the sealing pressing plate, and each gun head is sleeved with a sealing ring to be matched in each through hole.

Further, an inside of the shell of the gun body is slidably provided with a needle withdrawing plate, the top of the needle withdrawing plate is a pressing plate, the bottom of the needle withdrawing plate is a needle withdrawing groove plate, the needle withdrawing groove plate extends out of the lower portion of the shell, eight needle withdrawing grooves are formed in the needle withdrawing groove plate, the sleeve is arranged at the lower position of each gun head, a sliding groove is arranged in the middle of the needle withdrawing plate, a positioning block is fixedly arranged on the inner side of the shell, the needle withdrawing plate is arranged on the positioning block through the sliding groove, a guide pillar is arranged on the inner side of the needle withdrawing plate, a pressure spring is sleeved on the guide pillar, and when the push-pull plate is pushed down onto the pressing plate, the needle withdrawing plate is pushed down, and the needle withdrawing groove plate fades a needle on the gun heads.

Further, the ball stud is made of a high polymer material.

Further, the piston rod is divided into an upper section and a lower section, the upper section is connected with the clamping head and is made of a high polymer material, and the lower section is made of a metal material.

The beneficial effects of the utility model are as follows:

(1) The ball pin is matched with the clamping head of the piston rod, so that the coaxiality of the piston rod and the gun head can be automatically adjusted when the piston rod is lifted;

(2) When the push-pull plate is pressed down to the lowest position, the needle withdrawing plate is driven to withdraw the needle.

Drawings

FIG. 1 is a schematic diagram of the exterior structure of an eight-channel pipette of the present utility model;

FIG. 2 is a schematic view of the internal structure with the housing removed;

FIG. 3 is an enlarged view of a portion of the present utility model at the location of the inner push-pull plate.

The reference numerals in the drawings are respectively:

1. a gun body; second, the shell;

3. a connector; fourth, gun heads;

5. a guide rod; sixthly, a push-pull plate;

7. a return spring; eighth, seal the clamp plate;

9. a push-pull rod; a piston rod;

11. a clamping groove; 12, clamping heads;

13. a ball pin; 14, a faller;

15. a pressing plate; 16, withdrawing the needle groove plate;

17. a chute; 18, positioning blocks;

19. and (5) a guide post.

Detailed Description

The following describes in detail the embodiments of the eight-channel pipette of the present utility model with reference to the drawings.

Referring to fig. 1, the eight-channel pipette includes a flat gun body 1, with front and rear housings 2 enclosing components. A connector 3 is arranged above and connected to the driving part.

Referring to fig. 2 and 3, a row of eight gun heads 4 are arranged under the gun body 1 in a sealing manner, a push-pull plate 6 is arranged in the gun body 1 through a guide rod 5, return springs 7 are arranged on the guide rod 5, the guide rod 5 is positioned on the front side and the rear side of the gun body 1, and the guide rods are staggered by a distance in the left-right direction. The guide rods 5 can also be arranged at two ends of the push-pull plate 6, or two guide rods are arranged at the front side and the rear side. The return spring 7 is sleeved below the push-pull plate 6 on the guide rod 5.

The upper end of the gun head 4 is provided with a sealing pressing plate 8, eight through holes are formed in the sealing pressing plate 8, and each gun head 4 is sleeved with a sealing ring to be matched in each through hole. The gun head 4 is fixed, and the piston entering position of the gun head 4 is isolated from the outside, so that air and dust are prevented from entering.

The push-pull rod 9 is arranged above the push-pull plate 6, eight piston rods 10 are respectively arranged below the push-pull plate 6, the piston rods 10 are matched and arranged in the gun head 4, a cavity is formed in the middle of the push-pull plate 6, a clamping groove 11 is formed below the push-pull plate, the upper end of the piston rod 10 is provided with a clamping head 12, the clamping head 12 is clamped in the clamping groove 11, the clamping head 12 and the cavity form clearance fit, a ball head pin 13 is arranged above the push-pull plate 6, a ball head of the ball head pin 13 is ejected out by an internal spring, the ball head is positioned above the clamping head 12, and the ball head is in elastic point contact with the clamping head 12. The ball pin 13 is made of a high polymer material, in addition, the piston rod 10 is divided into an upper section and a lower section, the upper section is connected with the clamping head 12 and is made of a high polymer material, the lower section is made of a metal material, and the ball pin 13 and the clamping head 12 are made of the high polymer material, so that the buffer force can be increased, and the noise can be reduced.

An ejector plate 14 is slidably arranged on the inner side of a shell 2 of the gun body 1, a pressing plate 15 is arranged at the top of the ejector plate 14, an ejector pin groove plate 16 is arranged at the bottom of the ejector plate, the ejector pin groove plate 16 extends out of the lower side of the shell 2, eight ejector pin grooves are formed in the ejector pin groove plate 16, a chute 17 is arranged in the middle of each gun head 4 in a sleeved mode, a positioning block 18 is fixedly arranged on the inner side of the shell 2, the ejector plate 14 is arranged on the positioning block 18 through the chute 17, a guide column 19 is arranged on the inner side of the ejector plate 14, a pressure spring is sleeved on the guide column 19, when the push-pull plate 6 is pressed down onto the pressing plate 15, the ejector plate 14 is pressed down, and the ejector pin groove plate 16 fades a needle on the gun heads 4.

The working process of the utility model is as follows: the gun body 1 is connected to a driving mechanism by the connector 3, the driving mechanism moves the liquid-transferring gun to the position of a suction head box, the gun head 4 is aligned to clamp the suction head, then the suction head is moved to a liquid-absorbing position, the suction head stretches into a container, the driving mechanism lifts the push-pull rod 9 upwards, at the moment, the push-pull plate 6 moves upwards along with the push-pull rod 9, so that the piston rod 10 below is lifted in the gun head 4, and the suction head absorbs quantitative liquid.

After the liquid suction is finished, the driving mechanism moves the liquid-transferring gun to a liquid-filling position, the push-pull rod 9 is driven to be pressed down, at the moment, the push-pull plate 6 is subjected to downward force, the piston rod 10 is driven to move downward, the clamping head 12 above the piston rod 10 is matched with the ball pin 13, the piston rod 10 is enabled to automatically adjust the balance position in the gun head 4, the piston rod 10 is pressed down, and liquid is output from the gun head 4 to a liquid-filling container.

The driving mechanism moves the pipette to the suction head recovery position, the push-pull rod 9 is continuously pressed down, the push-pull plate 6 is pressed down to the position of the needle withdrawing plate 14, the needle withdrawing plate 14 is forced to move down, the needle withdrawing groove squeezes the suction head, the suction head is removed down, and the suction head falls into the recovery box.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. An eight-channel pipette, characterized in that: the gun comprises a flat gun body, a row of eight gun heads are arranged under the gun body in a sealing manner, a push-pull plate is arranged in the gun body through a guide rod, a return spring is arranged on the guide rod, the push-pull rod is arranged above the push-pull plate, eight piston rods are respectively arranged under the push-pull plate, the piston rods are matched and arranged in the gun heads, a cavity is formed in the middle of the push-pull plate, a clamping groove is formed in the lower portion of the push-pull plate, the upper end of each piston rod is a clamping head, the clamping heads are clamped in the clamping groove, the clamping heads and the cavity form clearance fit, a ball head pin is arranged above the push-pull plate, a ball head of each ball head pin is ejected out by an internal spring, and the ball head is positioned above the clamping heads and is in contact with elastic points of the clamping heads.

2. The eight channel pipette of claim 1 wherein: the guide rods are positioned on the front side and the rear side of the gun body and staggered by a distance in the left-right direction.

3. The eight channel pipette of claim 1 wherein: the upper end of the gun head is provided with a sealing pressing plate, eight through holes are formed in the sealing pressing plate, and each gun head is sleeved with a sealing ring to be matched in each through hole.

4. The eight channel pipette of claim 1 wherein: the gun comprises a gun body, wherein a shell body is provided with a needle withdrawing plate in a sliding manner, the top of the needle withdrawing plate is a pressing plate, the bottom of the needle withdrawing plate is a needle withdrawing groove plate, the needle withdrawing groove plate extends out from the lower portion of the shell body, eight needle withdrawing grooves are formed in the needle withdrawing groove plate, the lower portion of each gun head is sleeved with the sleeve, a sliding groove is formed in the middle of the needle withdrawing plate, a positioning block is fixedly arranged on the inner side of the shell body, the needle withdrawing plate is arranged on the positioning block through the sliding groove, a guide pillar is arranged on the inner side of the needle withdrawing plate, a pressure spring is sleeved on the guide pillar, and when the push-pull plate is pushed down onto the pressing plate, the needle withdrawing plate is pushed down, and the needle withdrawing groove plate fades a needle on the gun heads.

5. The eight channel pipette of any one of claims 1 to 4, wherein: the ball pin is made of a high polymer material.

6. The eight channel pipette of claim 5 wherein: the piston rod is divided into an upper section and a lower section, the upper section is connected with the clamping head and is made of a high polymer material, and the lower section is made of a metal material.