CN218796006U

CN218796006U - Multi-channel liquid shifter

Info

Publication number: CN218796006U
Application number: CN202223422686.2U
Authority: CN
Inventors: 周康康; 张大伟
Original assignee: Mettler Toledo Technology China Co ltd; Mettler Toledo Changzhou Measurement Technology Ltd; Mettler Toledo Changzhou Precision Instruments Ltd
Current assignee: Mettler Toledo Technology China Co ltd; Mettler Toledo Changzhou Measurement Technology Ltd; Mettler Toledo Changzhou Precision Instruments Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-04-07
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a multichannel pipettor, including casing, a plurality of pipettors, push pedal, locating part and driving piece. A plurality of pipettes are disposed within the housing, each pipette being provided with a piston head. The push plate is arranged in the shell and provided with a plurality of clamping grooves, and the clamping grooves are used for placing a plurality of piston heads respectively. The limiting piece is covered on the push plate and is clamped with the push plate to limit the piston head to fall off from the clamping groove. The driving piece is provided with a driving rod, and the driving rod is connected with the push plate and used for driving the push plate to move. The utility model discloses a multichannel pipettor can fix the piston head in the draw-in groove when push pedal and locating part joint, and when the joint was removed to push pedal and locating part, the piston head can take place to break away from with the push pedal. Therefore, the piston head and the push plate can be quickly assembled and disassembled by clamping and releasing the clamping of the push plate and the limiting part.

Description

Multi-channel liquid shifter

Technical Field

The utility model relates to a pipettor field especially is about a multichannel pipettor.

Background

The pipettor is an essential experimental instrument in all biochemical laboratories for all immunity, cell culture, clinical diagnosis and food analysis, and biochemical reagents can be transferred into a specific experimental vessel through the pipettor. And the appearance of the multi-channel pipettor greatly reduces the pipetting times in a single biochemical experiment, shortens the pipetting time and improves the pipetting efficiency.

For a multi-channel liquid transfer device, the piston head reciprocates during liquid suction and discharge, and the piston head risks falling off during reciprocating motion or when the multi-channel liquid transfer device falls off, so that the liquid transfer device loses the working function. The piston head of a common multi-channel pipette on the market is complex in fixing mode and structure, and the pipette is complex to disassemble and assemble.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multichannel pipettor, it can effectively alleviate the loaded down with trivial details problem of pipette dismouting in the multichannel pipettor.

In order to achieve the above object, the utility model provides a multichannel pipettor, including casing, a plurality of pipettes, push pedal, locating part and driving piece. The plurality of pipettes are disposed within the housing, each pipette having a piston head. The push plate is arranged in the shell and provided with a plurality of clamping grooves, and the clamping grooves are used for placing a plurality of piston heads respectively. The limiting piece covers the push plate and is clamped with the push plate to limit the piston head to fall off from the clamping groove. The driving piece is provided with a driving rod, and the driving rod is connected with the push plate and used for driving the push plate to move.

In one or more embodiments, the limiting member includes a first support plate and a second support plate in an L-shaped relationship, the first support plate is used for blocking the clamping groove, a first side plate bending to one side of the second support plate is formed at an edge of the first support plate, and the first side plate and the second support plate limit the piston head in a first direction, which is perpendicular to a moving direction of the driving rod.

In one or more embodiments, the edge of the second support plate is formed with a second side plate bending towards the first support plate, and the second side plate and the first support plate form a limit for the piston head in a second direction, wherein the second direction is parallel to the movement direction of the driving rod.

In one or more embodiments, the push plate comprises a front surface, the front surface is a surface of the push plate facing the pipette, and a distance between orthographic projections of the edge of the first side plate and the edge of the second side plate is less than or equal to a length of the front surface.

In one or more embodiments, the first strip is made of an elastic material, and a distance between an orthographic projection of an edge of the first side plate and an edge of the second side plate is less than a length of the front face.

In one or more embodiments, the second side plate is formed with a guide surface facing away from the first side plate.

In one or more embodiments, the push plate has a baffle formed thereon, and an orthographic distance between an edge of the baffle and an edge of the second side plate is less than a diameter of the piston head.

In one or more embodiments, the pipette further comprises a piston rod inserted into the pipette, the piston head is located at one end of the piston rod, each clamping groove is provided with a first avoidance portion, a second avoidance portion for avoiding the piston rod is formed on the second side plate, and the first avoidance portion and the second avoidance portion correspond to each other and form a through hole for the piston rod to pass through.

In one or more embodiments, a slide rail is formed on a side wall of the housing, and the push plate can slide on the slide rail.

In one or more embodiments, the casing is formed with a first fixing member, the first fixing member is formed with a plurality of first fixing grooves for clamping the pipette, the casing is formed with a second fixing member, and the second fixing member is formed with a plurality of second fixing grooves for placing the pipette.

In one or more embodiments, the pipette outer wall is formed with a boss located between the first fixing groove and the second fixing groove, and the driving member further includes a holding portion in which the driving rod is movable, the holding portion being connected to the casing.

Compared with the prior art, according to the utility model discloses a multichannel pipettor has following advantage:

the piston head can be quickly assembled and disassembled from the push plate by clamping and releasing the clamping of the push plate and the limiting part. Particularly, the first side plate and the second side plate are in abutting fit with the bottom surface and the front surface to achieve surrounding arrangement of the piston head, so that the piston head is prevented from falling off from the push plate.

When the locating part is dismantled to needs, promote first curb plate along the butt direction of the first curb plate of perpendicular to and bottom surface for the butt is removed with the bottom surface to first curb plate, can accomplish the joint relation of locating part and push pedal, simple structure, easy dismounting.

In order not to interfere the installation of the piston head, a first avoiding part is arranged on each clamping groove on the push plate and used for avoiding the placement of the piston rod. Because the space of the shell is limited, and the limiting part can be tightly matched with the push plate, a second avoiding part for avoiding the piston rod is arranged on the second side plate.

Drawings

Fig. 1 is a schematic perspective view of a multi-channel pipette according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an explosion structure of a multi-channel pipette according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a push plate and a stopper of a multi-channel pipette according to an embodiment of the present invention;

fig. 4 is a schematic top view of a multi-channel pipette according to an embodiment of the present invention;

fig. 5 isbase:Sub>A schematic cross-sectional view ofbase:Sub>A surfacebase:Sub>A-base:Sub>A of fig. 3 ofbase:Sub>A multi-channel pipette in accordance with an embodiment of the present invention;

fig. 6 is an enlarged view of portion a of fig. 5 of a multi-channel pipette in accordance with an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of plane B-B of fig. 3 of a multi-channel pipette in accordance with an embodiment of the present invention;

fig. 8 is an enlarged view of portion B of fig. 7 of a multi-channel pipette in accordance with an embodiment of the present invention.

Description of the main reference numerals:

1. a housing; 2. pushing the plate; 21. a card slot; 211. a baffle plate; 22. a first avoidance portion; 23. a front side; 24. a bottom surface; 25. a first fixing member; 251. a first fixing groove; 26. a second fixing member; 261. a second fixing groove; 27. a slide rail; 3. a limiting member; 31. a first support plate; 32. a second support plate; 33. a first side plate; 34. a second side plate; 35. a guide surface; 36. a second avoidance portion; 4. a drive member; 41. a drive rod; 5. a pipette; 51. a boss; 52. a piston head; 53. a piston rod; 6. an accommodating cavity.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 3, a multichannel pipettor according to an embodiment of the present invention includes a housing 1, a plurality of pipettes 5, a push plate 2, a limiting member 3, and a driving member 4. A plurality of pipettes 5 are provided within the housing 1, each pipette 5 being provided with a piston head 52. The push plate 2 is arranged in the housing 1, and the push plate 2 is provided with a plurality of clamping grooves 21, and the plurality of clamping grooves 21 are respectively used for placing a plurality of piston heads 52. The limiting piece 3 is covered on the push plate 2 and clamped with the push plate 2 to limit the piston head 52 from falling off from the clamping groove 21. The driving part 4 is connected with the shell 1, the driving part 4 is provided with a driving rod 41, and the driving rod 41 is connected with the push plate 2 and used for driving the push plate 2 to move, so that the piston heads 52 are driven to reciprocate, and the functions of liquid suction and liquid discharge are realized. Through the arrangement, when the push plate 2 and the limiting piece 3 are clamped, the piston head 52 can be fixed in the clamping groove 21, and when the push plate 2 and the limiting piece 3 are unlocked, the piston head 52 can be released from the clamping groove 21 and separated from the push plate 2. Therefore, the piston head 52 and the push plate 2 can be rapidly assembled and disassembled by clamping and releasing the clamping of the push plate 2 and the limiting part 3.

Specifically, as shown in fig. 2 and 6, the limiting member 3 includes a first support plate 31 and a second support plate 32 in an L shape, and the second support plate blocks the card slot 21 in the first direction. A first side plate 33 bent toward the second plate 32 is formed at an edge of the first plate 31, and the first side plate 33 and the second plate 32 perform a mutual limiting function in the first direction in the push plate 2. The first side plate 33 provides a supporting force for the second support plate 32 to block the card slot 21.

In another embodiment, the edge of the second support plate 32 is formed with a second side plate 34 bent toward the first support plate 31, and in the push plate 2, the second side plate 34 and the first support plate 31 form a limiting effect in the second direction. Therefore, the first side plate 33 and the second side plate 34 respectively form a limiting effect with the push plate 2 in the first direction and the second direction, so that the limiting part 3 is well clamped on the push plate 2. Wherein the first direction is perpendicular to the moving direction of the driving rod 41, and the second direction is parallel to the moving direction of the driving rod 41.

As shown in fig. 3, in one embodiment, the push plate 2 includes a front surface 23, and the front surface 23 is the surface of the push plate 2 facing the pipette 5. Under the action of non-external force, in order to ensure that the limiting member 3 is firmly clamped to the push plate 2 so as not to be separated from the push plate 2, the distance between the orthographic projections of the edges of the first side plate 33 and the second side plate 34 is less than or equal to the length of the front surface 23. Specifically, the length of the front surface 23 is the distance from the bottom surface 24 to the opposite surface, the bottom surface 24 is the surface of the push plate 2 corresponding to the bottom wall of the housing 1, and the bottom surface 24 is the surface away from the card slot 21.

In a preferred embodiment, the distance between the orthographic projection of the edge of the first side plate 33 and the edge of the second side plate 34 is smaller than the length of the front surface 23, and the first plate 31 is made of an elastic material, so that even if the distance between the orthographic projection of the edge of the first side plate 33 and the orthographic projection of the edge of the second side plate 34 is slightly smaller than the length of the front surface 23, the first plate 31 can firmly abut the retainer 3 to the push plate 2 through elastic deformation due to the elasticity of the first plate 31. When the stopper 3 needs to be detached, the first side plate 33 is pushed in a direction perpendicular to the abutting direction of the first side plate 33 and the bottom surface 24. The first side plate 33 is released from abutment with the bottom surface 24 due to the elasticity of the first side plate 31, so that the stopper 3 can be removed.

In an embodiment, the push plate 2 is provided with a clamping groove 21, a part of the piston head 52 is placed in the clamping groove 21, the limiting member 3 can surround the part exposed outside the clamping groove 21, and the clamping groove 21 and the limiting member 3 cooperate to form an accommodating cavity 6, which can effectively prevent the piston head 52 from falling off from the clamping groove 1. Specifically, the baffle 211 is formed on the push plate 2, and the distance between the baffle 211 and the second side plate 34 is smaller than the diameter of the piston head 52, so that the piston head 52 cannot fall off from the accommodating cavity 6.

As shown in fig. 2 to 5, the push plate 2 has a bottom surface 24 and a front surface 23, the stopper 3 has a first side plate 33 and a second side plate 34 which can be brought into contact with the bottom surface 24 and the front surface 23, respectively, and the stopper 3 has a substantially L-shaped cross section. The first side plate 33 and the second side plate 34 are in abutting fit with the bottom surface 24 and the front surface 23 to achieve surrounding arrangement of the piston head 52, so that the piston head 52 is prevented from falling off the push plate 2.

In one embodiment, as shown in fig. 6 and 7, a guide surface 35 is formed on the second side plate 34 on the side away from the first side plate 33. The guide surface 35 is arranged so as not to be clamped on the push plate 2 when the limiting member 3 is mounted, and mounting accuracy and mounting efficiency of the limiting member 3 are improved.

In one embodiment, a piston rod 53 is provided within the pipette 5, and a piston head 52 is provided at one end of the piston rod 53. Since the piston rod 53 is connected to the piston head 52, in order not to interfere with the installation of the piston head 52, a first escape portion 22 is provided on each catching groove 21 of the push plate 2 for avoiding the placement of the piston rod 53. Since the space of the housing 1 is limited and the stopper 3 can be tightly fitted to the push plate 2, a second escape portion 36 for escaping the piston rod 53 is formed on the third extension plate. When being installed, the first avoiding portion 22 and the second avoiding portion 36 correspond to each other and enclose a through hole for the piston rod 53 to pass through.

As shown in fig. 1 and 2, in order to reduce the friction between the push plate 2 and the side wall of the housing 1, at least two slide rails 27 are provided on the side wall of the housing 1. So as to reduce the contact area of the push plate 2 with the side wall of the shell 1 in the moving process, and ensure that the push plate 2 can move more rapidly and more laborsavingly.

For fixing the pipette 5, a first holder 25 is provided on the housing 1, and a plurality of first fixing grooves 251 for engaging with the pipette 5 are formed on the first holder 25. A second fixing member 26 is further provided on the casing 1, and a plurality of second fixing grooves 261 for placing the pipettes 5 are formed on the second fixing member 26. In one embodiment, the outer wall of the pipette 5 is formed with a boss 51, and the boss 51 is located between the first fixing groove 251 and the second fixing groove 261 to prevent the pipette 5 from falling out of the casing 1.

In an embodiment, the driver 4 further comprises a hand-held portion, which is connected with the housing 1. The driving rod 41 can move in the handheld part, and the driving rod 41 can drive the push plate 2 to move by pushing the driving rod 41.

the piston head 52 can be quickly assembled and disassembled from the push plate 2 by clamping and releasing the clamping between the push plate 2 and the limiting part 3. In particular, the first side plate 33 and the second side plate 34 are abutted against the bottom surface 24 and the front surface 23 to surround the piston head 52, so that the piston head 52 is prevented from falling off the push plate 2.

When the limiting part 3 needs to be detached, the first side plate 33 is pushed along the abutting direction perpendicular to the first side plate 33 and the bottom surface 24, so that the abutting of the first side plate 33 and the bottom surface 24 is removed, and the clamping relation between the limiting part 3 and the push plate 2 can be completed.

In order not to interfere with the mounting of the piston head 52, a first escape portion 22 is provided on each catching groove 21 of the push plate 2 for avoiding the placement of the piston rod 53. Since the space of the housing 1 is limited and the limiting member 3 can be tightly matched with the push plate 2, a second avoiding portion 36 for avoiding the piston rod 53 is arranged on the second side plate 34.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A multichannel pipette, comprising:

a housing (1);

a plurality of pipettes (5) disposed within the housing (1), each pipette (5) having a piston head (52);

the push plate (2) is arranged in the shell (1), the push plate (2) is provided with a plurality of clamping grooves (21), and the clamping grooves (21) are used for placing the piston head (52);

the limiting piece (3) is covered on the push plate (2) and clamped with the push plate (2) to limit the piston head (52) from falling off from the clamping groove (21); and

driving piece (4), driving piece (4) have actuating lever (41), actuating lever (41) with push pedal (2) are connected and are used for the drive push pedal (2) remove.

2. The multi-channel pipette according to claim 1, wherein the stopper (3) comprises a first plate (31) and a second plate (32) in an L-shaped relationship, the first plate (31) is used for blocking the slot (21), a first side plate (33) bent toward the second plate (32) is formed at an edge of the first plate (31), and the first side plate (33) and the second plate (32) limit the piston head (52) in a first direction perpendicular to the moving direction of the driving rod (41).

3. The multi-channel pipette according to claim 2, wherein an edge of the second plate (32) is formed with a second side plate (34) bent toward the first plate (31), and the second side plate (34) and the first plate (31) form a limit for the piston head (52) in a second direction parallel to the moving direction of the driving rod (41).

4. The multichannel pipette according to claim 3, wherein the push plate (2) comprises a front face (23), the front face (23) being the face of the push plate (2) facing the pipette (5), and the distance between the orthographic projection of the edge of the first side plate (33) and the edge of the second side plate (34) being less than or equal to the length of the front face (23).

5. The multichannel pipette according to claim 4, wherein the first side plate (31) is made of an elastic material and a distance between an orthographic projection of an edge of the first side plate (33) and an edge of the second side plate (34) is smaller than a length of the front face (23).

6. The multi-channel pipette according to claim 3, wherein the second side plate (34) is formed with a guide surface (35) on a side facing away from the first support plate (31).

7. The multichannel pipette according to claim 3, wherein a baffle (211) is formed on the push plate (2), and an orthographic distance between an edge of the baffle (211) and an edge of the second side plate (34) is smaller than a diameter of the piston head (52).

8. The multi-channel pipette according to claim 3, further comprising a piston rod (53) inserted into the pipette (5), wherein the piston head (52) is located at one end of the piston rod (53), each of the locking slots (21) is provided with a first avoiding portion (22), a second avoiding portion (36) for avoiding the piston rod (53) is formed on the second side plate (34), and the first avoiding portion (22) and the second avoiding portion (36) correspond to each other and enclose a through hole for the piston rod (53) to pass through.

9. The multi-channel pipette according to claim 1, wherein a slide rail (27) is formed on a side wall of the housing (1), and the push plate (2) is slidable on the slide rail (27).

10. The multi-channel pipette according to claim 1, wherein a first fixing member (25) is formed on the housing (1), a plurality of first fixing grooves (251) for clamping the pipette (5) are formed on the first fixing member (25), a second fixing member (26) is formed on the housing (1), and a plurality of second fixing grooves (261) for placing the pipette (5) are formed on the second fixing member (26).