Housing assembly for pipettor and pipettor

Abstract

The utility model discloses a shell assembly for a pipettor and the pipettor. The shell assembly comprises a handle part, the bending part is positioned at the top end of the handle part; the first operation part is positioned on the upper end surface of the bending part and is used for controlling the pipettor to absorb liquid and / or discharge liquid; when the handle part is held by a hand of an operator, the first operation part is positioned in a pressing range of a thumb of the operator; the second operation part is positioned on the lower end surface of the bending part and is used for controlling the pipettor to absorb liquid and / or discharge liquid; when the handle part is held by the hand of an operator, the second operation part is located within the pressing range of the index finger of the operator, and the user can freely select the first operation part and / or the second operation part to operate so as to control the piston assembly to perform the liquid suction and drainage function.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a housing component for a pipette and the pipette. Background Art

[0002] In medical, pharmaceutical, gene and protein research, biological research, drug development laboratories and other biotechnology application fields, pipettes are often needed to manipulate laboratory samples in various laboratory operating procedures. The main purpose is to use pipettes to aspirate a certain volume of liquid into a pipette and then distribute the liquid into several required volumes of liquid.

[0003] Currently, most electric pipettes are based on the air piston principle. Due to the compressibility of air and the capillary and electrostatic forces exerted on the surface of the pipette tip, the reliable operating range is limited to just over 1 microliter. The aspiration and discharge control buttons of electric pipettes are typically located on the back or front of the pipette housing, requiring only the thumb or index finger to press the control button for aspiration and discharge, which can cause hand discomfort after prolonged use. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a housing assembly and a pipette for a pipette, in which the user can freely select the first operating part and / or the second operating part to operate, thereby controlling the piston assembly to perform the suction and discharge functions, thereby preventing hand discomfort caused by a single operating method.

[0005] The utility model adopts the following technical solutions:

[0006] A housing assembly for a pipette comprises: a handle; a bent portion located at the top end of the handle; a first operating portion located at the upper end surface of the bent portion, for controlling the pipette to aspirate and / or discharge liquid; when an operator's hand is gripping the handle, the first operating portion is located within the pressing range of the operator's thumb; a second operating portion located at the lower end surface of the bent portion, for controlling the pipette to aspirate and / or discharge liquid; when the operator's hand is gripping the handle, the second operating portion is located within the pressing range of the operator's index finger; both the first operating portion and the second operating portion can be used to control the pipette to aspirate and / or discharge liquid, and the user can freely select the first operating portion and / or the second operating portion to operate, thereby controlling the piston assembly to perform the aspiration and discharge functions, thereby preventing hand discomfort caused by a single operating method.

[0007] Preferably, when the operator's hand holds the handle and the operator's thumb is in contact with the first operating portion, the first operating portion is located on the joint bending path of the operator's thumb, making it easy to operate the first operating portion with the thumb.

[0008] Preferably, when the operator holds the handle with his hand and the operator's index finger is in contact with the second operating part, the second operating part is located on the joint bending path of the operator's index finger, making it easy to operate the first operating part with the index finger.

[0009] Preferably, a hand-hanging portion is provided on the lower end surface of the bent portion, and an opening is provided on the side of the hand-hanging portion away from the handle portion, and the second operating portion is installed at the opening; when the operator's hand holds the handle portion, the operator's middle finger fits against the curved surface of the hand-hanging portion, thereby improving the stability of the operator's grip.

[0010] Preferably, the lower surface of the second operating portion is designed to be a curved surface. When the operator holds the handle, the middle finger of the operator fits into the curved surface, thereby improving the stability of the operator's grip.

[0011] Preferably, the housing assembly further comprises: a third operating portion, which is provided on the handle and is movable relative to the handle for draining the liquid in the pipette; a lug, which is located on the third operating portion; when the operator's hand is gripping the handle and the operator's thumb and index finger are wrapped around the pipette to grip it, the base of the operator's hand fits against the lug, and this design is ergonomic.

[0012] Preferably, the first operating part can move along the first direction under the pressure of the operator's thumb, and the second operating part can move along the second direction under the pressure of the operator's index finger. The angle between the first direction and the second direction is 80-100 degrees, which is ergonomic and reduces hand discomfort.

[0013] A pipette comprises: a housing assembly; a circuit board disposed within the housing assembly and having a first microswitch and a second microswitch; a piston assembly disposed within the housing assembly and connected to the circuit board; a first operating portion capable of rotating relative to the first microswitch and moving along a first direction to drive the first microswitch; and a second operating portion capable of moving along a second direction to drive the second microswitch, thereby controlling the piston assembly to perform aspiration and discharge functions, thereby preventing hand discomfort caused by a single operating method.

[0014] Preferably, the piston assembly includes a piston inner sleeve and a sealing ring. The piston inner sleeve is provided with a plurality of connecting holes, and the sealing ring is provided with matching connecting ears to ensure the sealing between the piston inner sleeve and the piston cylinder. In addition, the piston assembly can be disassembled as a whole during disassembly, reducing the steps and time of disassembly.

[0015] Preferably, the second operating portion is slidably fitted in the bending portion, and a guide and limit assembly is provided between the second operating portion and the bending portion, which can guide and limit the movement of the second operating portion.

[0016] Compared with the prior art, the present invention has the following advantages: the present invention provides a housing assembly for a pipette, comprising a handle, a bending portion, a first operating portion and a second operating portion. Both the first operating portion and the second operating portion can be used to control the pipette to aspirate and / or discharge liquid. The user can freely select the first operating portion and / or the second operating portion to operate, thereby controlling the piston assembly to perform aspiration and discharge functions, thereby preventing hand discomfort caused by a single operating method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of an electric pipette.

[0018] Figure 2 A cross-sectional view of an electronic pipette.

[0019] Figure 3 for Figure 2 A partial enlarged view of part A.

[0020] Figure 4 for Figure 2 A partial enlarged view of part B.

[0021] Figure 5 This is a partial structural exploded diagram of the piston assembly.

[0022] Figure 6 Another cross-sectional view of the electronic pipette.

[0023] Figure 7 for Figure 6 A partial enlarged view of part C.

[0024] Figure 8 for Figure 6 A partial enlarged view of part D.

[0025] Figure 9 Schematic diagram of the structure of the second operating part.

[0026] In the figure, the handle 1, the bending part 2, the first guide groove 2-1, the limiting protrusion 2-2, the travel limiting plate 2-3, the first operating part 3, the second operating part 4, the guide part 4-1, the limiting notch 4-2, the limiting part 4-3, the hand hanging part 5, the opening 5-1, the third operating part 6, the lug 7, the circuit board 8, the first micro switch 8-1, the second micro switch 8-2, the piston assembly 9, the piston inner sleeve 9-1, the connecting hole 9-1-1, the sealing ring 9-2, the connecting lug 9-2-1, and the piston cylinder 9-3. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the technical solution of the present utility model, the following is a detailed description with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, a housing assembly for a pipette, comprising:

[0030] The handle 1 has an overall cylindrical shape and is held by the operator;

[0031] The bent portion 2 is located at the top of the handle 1 and forms a shell that is approximately in an inverted L shape with the handle 1;

[0032] The first operating portion 3 is located on the upper end surface of the bent portion 2 and is used to control the pipette to aspirate and / or discharge liquid; when the operator's hand holds the handle 1, the first operating portion is within the pressing range of the operator's thumb;

[0033] The second operating portion 4 is located at the lower end surface of the bent portion 2 and is used to control the pipette to aspirate and / or discharge liquid. When the operator's hand holds the handle 1, the second operating portion is within the pressing range of the operator's index finger.

[0034] This embodiment is explained by taking the example that both the first operating part 3 and the second operating part 4 can control the pipette to aspirate and discharge liquid. Operating the first operating part 3 alone, operating the second operating part 4 alone, or operating the first operating part 3 and the second operating part 4 in turn can all control the pipette to aspirate and discharge liquid.

[0035] Among them, since the thumb and index finger are bent and press the corresponding structure during the operation, when the operator uses the first operating part 3, the operator's hand is held on the handle 1, and the operator's thumb is attached to the first operating part 3, and the first operating part 3 is located on the joint bending path of the operator's thumb; when the operator uses the second operating part 4, the operator's hand is held on the handle 1, and the operator's index finger is attached to the second operating part 4, and the second operating part 4 is located on the joint bending path of the operator's index finger; when the operator uses the first operating part 3 and the second operating part 4, the operator's hand is held on the handle 1, the thumb is attached to the first operating part 3, and the index finger is attached to the second operating part 4.

[0036] The first operating part 3 can be moved along a first direction under the pressure of the operator's thumb, and the second operating part 4 can be moved along a second direction under the pressure of the operator's index finger. The angle between the first direction and the second direction is 80-100 degrees, which is ergonomic and can reduce hand discomfort after long-term use.

[0037] As a preferred embodiment, the angle between the first direction and the second direction is 90 degrees.

[0038] The lower end surface of the bent portion 2 is provided with a hand-hanging portion 5. An opening 5-1 is provided on the side of the hand-hanging portion away from the handle 1. The second operating portion 4 is slidably fitted into the opening 5-1. When the operator's hand grasps the handle 1, the operator's middle finger fits against the curved surface of the hand-hanging portion 5.

[0039] like Figure 6-Figure 9 As shown, the bending portion 2 has a first guide groove 2-1, and the second operating portion 4 is provided with a matching guide portion 4-1, which can guide the movement of the second operating portion 4. The bending portion 2 has a limiting protrusion 2-2, and the second operating portion 4 is provided with a matching limiting notch 4-2. The limiting protrusion 2-2 is a raised structure on the wall surface near the opening 5-1 in the bending portion 2, having a horizontal surface and an inclined surface. The limiting notch 4-2 is a matching structure that can fit the limiting protrusion 2-2 to prevent the second operating portion 4 from shaking while moving. The bending portion 2 has a travel limiting plate 2-3, and the second operating portion 4 is provided with a matching limiting portion 4-3. After the second operating portion 4 moves inward a certain distance, the limiting portion 4-3 will contact the travel limiting plate 2-3, preventing the second operating portion 4 from being pressed excessively, causing damage to the second micro switch 8-2. At the same time, the travel limiting plate 2-3 can prevent the second operating portion 4 from deviating upward while moving.

[0040] like Figure 1-Figure 3 As shown, the housing assembly further includes:

[0041] a third operating portion 6, disposed on the handle 1 and movable relative to the handle 1, for draining the liquid from the pipette;

[0042] a lug 7 located on the third operating portion 6;

[0043] When the operator's hand holds the handle 1 and the operator's thumb and index finger wrap around the pipette to hold it, the base of the operator's hand fits against the lug; after using the pipette once, the thumb presses the third operating part 6 to empty the liquid in the pipette to prevent liquid residue from affecting the next use.

[0044] As an embodiment, the lower surface of the second operating portion 4 is designed to be a curved surface. When the operator's hand holds the handle 1, the operator's middle finger fits against the curved surface, thereby improving the operator's grip stability.

[0045] like Figure 2-8 As shown, a pipette comprises:

[0046] The above-mentioned housing assembly;

[0047] The circuit board 8 is disposed in the bent portion 2 and has a first micro switch 8 - 1 and a second micro switch 8 - 2 ;

[0048] The piston assembly 9 is disposed in the handle 1 and connected to the circuit board 8;

[0049] The first operating part 3 can rotate relative to the first micro switch 8 - 1 and move along the first direction to drive the first micro switch 8 - 1;

[0050] The second operating portion 4 is movable in the second direction to drive the second micro switch 8 - 2 .

[0051] like Figure 2-Figure 3 As shown, the first operating part 3 is a knob, and the second operating part 4 is a button. The knob is rotated relative to the first microswitch 8-1 to control the volume of liquid suction and discharge. The knob can be moved in a first direction to press the first microswitch 8-1, triggering the suction and discharge control program of the circuit board 8; the button can be moved in a second direction to drive the second microswitch 8-2, triggering the suction and discharge control program of the circuit board 8. When in use, simply pressing the first operating part 3 or the second operating part 4 can trigger the suction and discharge control program of the circuit board 8 through the first microswitch 8-1 or the second microswitch 8-2, and control the piston assembly 9 to work to suction and discharge liquid. Specifically, taking the first operating part 3 as an example, when in use, pressing the first operating part 3 can control the piston assembly 9 to suction liquid through the circuit board 8, and pressing the first operating part 3 again can control the piston assembly 9 to discharge liquid through the circuit board 8. The circuit board 8 controlling the operation of the piston assembly 9 is a conventional technical means and is not the design focus of this application, so it will not be described in detail.

[0052] As an embodiment, the first micro switch 8-1 can be a micro switch with model EC060101X0A-VH1-021 produced by Guangdong Shengwei Electronic Products Co., Ltd.; the second micro switch 8-2 ​​can be a micro switch with model B3U-1000P(M)-B produced by Japan Omron Group.

[0053] The circuit board 8 includes a first circuit board 8-3 and a second circuit board 8-4. The first micro switch 8-1 is set on the first circuit board 8-3, and the second micro switch 8-2 ​​is set on the second circuit board 8-4. Both the first circuit board 8-3 and the second circuit board 8-4 can control the operation of the piston assembly 9.

[0054] In addition, a power switch is also provided on the circuit board 8. The power switch is arranged at the end of the bending portion 2. After use, the power can be completely cut off to prevent continuous power consumption in the dormant state.

[0055] like Figure 4-5As shown, the piston assembly 9 includes a piston inner sleeve 9-1 and a sealing ring 9-2. The piston inner sleeve 9-1 is provided with four connecting holes 9-1-1, and the sealing ring 9-2 is provided with matching connecting ears 9-2-1. The connecting ears 9-2-1 are embedded in the connecting holes 9-1-1. When in use, the piston inner sleeve 9-1 and the motor shaft sleeve are threaded together to press against the upper and lower ends of the sealing ring 9-2, and the sealing ring 9-2 is sealed between the piston inner sleeve 9-1 and the piston cylinder 9-3. The inner side surface of the sealing ring 9-2 is an arc surface. After being squeezed by the piston inner sleeve 9-1 and the motor shaft sleeve, it is deformed and convex and closely adheres to the surface of the piston cylinder 9-3 to achieve sealing. In addition, through the cooperation between the connecting holes 9-1-1 and the connecting ears 9-2-1, the entire assembly can be disassembled during disassembly, reducing the steps and time of disassembly.

[0056] As an embodiment, the handle 1 or the bending portion 2 may also be provided with buttons such as editing, saving, switching interface, switching speed, and suction and withdrawal head.

[0057] The above are only preferred embodiments of the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the scope of protection of the present invention.

Claims

1. A housing assembly for a pipette, characterized in that: include: handle (1); a bending portion (2) located at the top end of the handle (1); A first operating portion (3) is located on the upper end surface of the bent portion (2) and is used to control the pipette to aspirate and / or discharge liquid; when the operator's hand holds the handle (1), the first operating portion is within the pressing range of the operator's thumb; The second operating portion (4) is located on the lower end surface of the bent portion (2) and is used to control the pipette to aspirate and / or discharge liquid; when the operator's hand holds the handle (1), the second operating portion is within the pressing range of the operator's index finger.

2. The housing assembly for a pipette according to claim 1, wherein: When the operator's hand holds the handle (1) and the operator's thumb fits the first operating part (3), the first operating part (3) is located on the joint bending path of the operator's thumb.

3. The housing assembly for a pipette according to claim 1, wherein: When the operator's hand holds the handle (1) and the operator's index finger fits the second operating part (4), the second operating part (4) is located on the joint bending path of the operator's index finger.

4. The housing assembly for a pipette according to claim 1, wherein: The lower end surface of the bending portion (2) is provided with a hand-hanging portion (5), and an opening (5-1) is provided on a side of the hand-hanging portion away from the handle portion (1), and the second operating portion (4) is installed at the opening; when the operator's hand grasps the handle portion (1), the operator's middle finger fits against the curved surface of the hand-hanging portion (5).

5. The housing assembly for a pipette according to claim 1, wherein: The lower surface of the second operating portion (4) is designed to be a curved surface, and when the operator's hand holds the handle (1), the operator's middle finger fits against the curved surface.

6. The housing assembly for a pipette according to claim 1, wherein: The housing assembly further comprises: a third operating portion (6) disposed on the handle (1) and movable relative to the handle (1) for draining liquid from the pipette; a lug (7) located on the third operating portion (6); When an operator holds the handle (1) with his hand and the operator's thumb and index finger surround the pipette to hold it, the base of the operator's hand fits against the lug.

7. The housing assembly for a pipette according to claim 1, wherein: The first operating portion (3) can be moved along a first direction under the pressing action of an operator's thumb, and the second operating portion (4) can be moved along a second direction under the pressing action of an operator's index finger, and the angle between the first direction and the second direction is 80-100 degrees.

8. A pipette, characterized in that include: The housing assembly according to any one of claims 1 to 7; A circuit board (8) is arranged in the housing assembly and has a first micro switch (8-1) and a second micro switch (8-2); A piston assembly (9) is disposed in the housing assembly and connected to the circuit board (8); The first operating portion (3) is capable of rotating relative to the first micro switch (8-1) and moving along a first direction to drive the first micro switch (8-1); The second operating portion (4) can move along a second direction to drive a second micro switch (8-2).

9. The pipette according to claim 8, characterized in that The piston assembly (9) comprises a piston inner sleeve (9-1) and a sealing ring (9-2). The piston inner sleeve (9-1) is provided with a plurality of connecting holes (9-1-1), and the sealing ring (9-2) is provided with matching connecting ears (9-2-1).

10. The pipette according to claim 8, characterized in that The second operating portion (4) is slidably fitted in the bending portion (2), and a guide and limiting component is provided between the second operating portion (4) and the bending portion (2).

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