TW202214834A - Liquid transfer device - Google Patents

Abstract

A liquid transfer device comprises press mechanism, a shell, a connecting piece, and a liquid taking unit. The press mechanism includes a pressing part. The shell includes a first side wall and a second top wall, the first side wall and the second top wall form a housing cavity, and the press mechanism is arranged in the housing cavity. One end of the connecting piece is connected to the second side wall. The other end of the connecting piece is connected to the liquid taking assembly. The liquid taking assembly includes a liquid taking pipe, a liquid taking head and a second connecting part. The liquid taking assembly extends into the housing cavity so that the liquid taking pipe is set corresponding to the extrusion part. The press mechanism moves along the center axis of the housing cavity, which drives the extrusion part to move relative to the liquid taking pipe, so that the extrusion part supports or releases the liquid taking pipe to release or absorb the liquid. The liquid transfer device has simple operation and can quantitatively absorb liquid. The liquid taking unit can be replaced, and the press mechanism can be reused to save cost.

Description

Liquid transfer device

The present invention relates to the technical field of liquid transfer, in particular to a liquid transfer device.

Many conventional diagnostic tests involving biological reactions need to be completed in professional laboratories, and the equipment is complex, large in size, high in cost, and complicated in operation. It is operated by skilled technicians and cannot achieve home portable testing.

In view of this, in order to solve at least one of the above drawbacks, it is necessary to provide a liquid transfer device.

The present invention provides a liquid transfer device, which comprises a pressing mechanism, a casing, a connecting piece and a liquid taking component. The pressing mechanism includes a pressing body, a first top wall disposed at one end of the pressing body, and a pressing portion disposed on the first top wall away from the pressing body; the housing includes a first side wall and a second a top wall, the first side wall is connected to the second top wall and surrounds a accommodating cavity, the pressing mechanism is accommodated in the accommodating cavity and is used for reciprocating movement along the central axis of the accommodating cavity; the The connecting piece includes a second side wall and a first connecting portion, the first connecting portion is connected to the second side wall, and the second side wall is detachably connected to an end of the first side wall close to the second top wall; the The liquid taking assembly includes a liquid taking tube, a liquid taking head, and a second connection part that communicates the liquid taking tube and the liquid taking head, and the liquid taking assembly is used to extend into the accommodating cavity from the second top wall , so that the liquid taking tube is arranged corresponding to the pressing portion, the liquid taking head is located outside the accommodating cavity, and the second connecting portion is detachably connected to the first connecting portion. Wherein, the pressing mechanism is used for reciprocating movement along the central axis of the accommodating cavity, thereby driving the pressing portion to move back and forth relative to the liquid taking tube, so that the pressing portion abuts or releases the liquid taking the tube, so that the liquid taking tube is deformed, so that the liquid taking tube releases or absorbs the liquid.

In an embodiment of the present application, the liquid transfer device further includes a positioning member, the positioning member includes a sliding portion and a positioning portion, the positioning portion is provided on the first side wall, and the sliding portion is accommodated in the accommodating cavity, Corresponding to the sliding portion, the pressing mechanism further includes a sliding track, the sliding track extends along the central axis of the accommodating cavity, and the sliding portion is used for reciprocating movement along the sliding track, thereby restricting the pressing mechanism along the center axis. The distance of the reciprocating movement of the central axis of the accommodating cavity.

In the embodiment of the present application, the pressing portion includes a third side wall, one end of the third side wall is connected to the first top wall, and the third side wall and the first top wall are surrounded to form a liquid taking tank, The liquid taking tank is coaxial with the accommodating cavity. The aperture of the liquid taking tank increases along the direction away from the first top wall, the liquid taking pipe is used to extend into or out of the liquid taking tank, and the third side wall is used to resist or loosen the liquid taking tank. liquid pipe.

In the embodiment of the present application, the inner diameter of the liquid taking tube along the direction perpendicular to the central axis of the accommodating cavity decreases from the end close to the liquid taking head to the end far from the liquid taking head.

In the embodiment of the present application, an inner surface of the third side wall is provided with a pressing block, and the pressing block is used to abut or loosen the liquid taking tube.

In the embodiment of the present application, the pressing mechanism further includes an elastic member accommodated in the accommodating cavity, one end of the elastic member abuts against the first top wall, and the other end against the second top wall, so The elastic restoring force of the elastic member is used to move the pressing mechanism away from the second top wall.

In the embodiment of the present application, the elastic member is sleeved on the outer side of the pressing portion; or, there are multiple elastic members, and the multiple elastic members are arranged around the liquid sampling tube.

In the embodiment of the present application, the first connecting portion is connected with the second connecting portion in a snap connection or screw connection; the first side wall is connected with the second side wall by a snap connection or a screw connection.

In an embodiment of the present application, the connecting member includes a third top wall connected to the second side wall, and the first connecting portion includes a first bayonet penetrating the third top wall, and penetrating the third top wall. a second bayonet and a first bayonet that is walled and communicated with the first bayonet; the second connection part comprises a body of the connection part, a second bayonet set on the body of the connection part, and a bayonet set on the body of the connection part. A guide rod on the body and a hook arranged on the guide rod. Wherein, the guide rod extends into the first bayonet and is clamped into the second bayonet, the hook is clamped on the side of the first bayonet close to the accommodating cavity, the second bayonet The card position is clamped on a side of the first card position away from the accommodating cavity, so that the first connection part and the second connection part are detachably connected.

In the embodiment of the present application, one end of the pressing body away from the liquid-taking assembly extends out of the casing to form a pressing portion. The surface of the pressing body close to the casing is provided with a guide bar, the inner surface of the first side wall is provided with a chute, the chute extends along the central axis of the accommodating cavity, and the guide bar is used for clamping into the chute and reciprocate along the chute.

Compared with the prior art, the liquid transfer device provided by the present invention has a simple structure and simple operation, can achieve quantitative liquid absorption, and can realize the transfer of a small amount of liquid; and the liquid sampling assembly and the pressing mechanism can be detachably arranged, and the pressing mechanism can be used multiple times. , The liquid collection component is a one-time consumable, which can be replaced at any time, saving costs.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a co-existence of an intervening component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a co-existing centered component. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

The system implementations described below are only illustrative, and the division of the modules or circuits is only a logical function division, and other division methods may be used in actual implementation. Furthermore, it is clear that the word "comprising" does not exclude other units or steps and the singular does not exclude the plural. Multiple units or means stated in the system claim may also be implemented by the same unit or means through software or hardware. The terms first, second, etc. are used to denote names and do not denote any particular order.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 to FIG. 7 , which are a liquid transfer device 100 provided in an embodiment of the present invention. The liquid transfer device 100 includes a casing 1 , a pressing mechanism 2 , a liquid taking assembly 3 and a connector 4 . The pressing mechanism 2 includes a pressing body 21 , a first top wall 25 disposed at one end of the pressing body 21 , and a pressing portion 22 disposed on the first top wall 25 away from the pressing body 21 . The housing 1 includes a first side wall 11 and a second top wall 12 . The first side wall 11 is connected to the second top wall 12 and surrounds an accommodating cavity 17 . The pressing mechanism 2 is accommodated in the accommodating cavity 17 and used for to reciprocate along the central axis a of the accommodating cavity 17 . The connecting member 4 includes a second side wall 41 and a first connecting portion 44 , the first connecting portion 44 is connected to the second side wall 41 , and the second side wall 41 is detachably connected to the first side wall 11 adjacent to the second top wall 12 . one end. The liquid taking assembly 3 includes a liquid taking pipe 31 , a liquid taking head 32 and a second connecting portion 33 connecting the liquid taking pipe 31 and the liquid taking head 32 , and the liquid taking assembly 3 is used to extend from the second top wall 12 into the accommodating cavity 17, so that the liquid taking tube 31 is arranged corresponding to the pressing part 22, the liquid taking head 32 is located outside the accommodating cavity 17, and the second connecting part 33 is detachably connected to the first connecting part 44 . The pressing mechanism 2 is used for reciprocating movement along the central axis a of the accommodating cavity 17, thereby driving the squeezing portion 22 to move back and forth relative to the liquid taking tube 31, so that the squeezing portion 22 presses against or loosens the liquid taking tube 31. tube 31, so that the liquid taking tube 31 is deformed, so that the liquid taking tube 31 releases or absorbs the liquid.

Please refer to FIG. 1 and FIG. 3 , the housing 1 further includes a first liquid taking through hole 13 disposed on the second top wall 12 , a clamping slot 16 disposed on the first side wall 11 , and the liquid taking pipe 31 It extends into the accommodating cavity 17 through the first liquid taking through hole 13 .

In this embodiment, the connecting member 4 and the housing 1 may be connected by a snap fit.

In this embodiment, the second side wall 41 is provided with at least one blocking block 45 , and corresponding to the blocking block 45 , the outer surface of one end of the first side wall 11 close to the second top wall 12 is provided with a blocking groove 16 , and the blocking block 45 is slid into the card slot 16 , so that the connector 4 can be detachably connected to the housing 1 . It can be understood that, the connector 4 and the housing 1 can also be screwed together.

Referring to FIG. 14 , the second connecting portion 33 includes a connecting portion body 331 , a second latching position 332 disposed on the connecting portion body 331 , a guide rod 333 disposed on the connecting portion body 331 , and a guide rod 333 disposed on the guide rod 333 . Hook 334.

Please refer to FIG. 12 and FIG. 13 , and also refer to FIG. 14 and FIG. 15 , the connector 4 further includes a third top wall 42 connecting the second side wall 41 and a second liquid-taking through hole 43 penetrating the third top wall 42 , the first connecting portion 44 is located around the second liquid-taking through hole 43 , and the first connecting portion 44 includes a first bayonet 441 penetrating the third top wall 42 , passing through the third top wall 42 and connecting with the third top wall 42 . The first bayonet 441 communicates with the second bayonet 442 and the first bayonet 443 . The liquid taking tube 31 extends into the accommodating cavity 17 through the second liquid taking through hole 43 and the first liquid taking through hole 13 , and the guide rod 333 extends into the second card from the side of the third top wall 42 away from the accommodating cavity 17 . The hook 334 is stuck on the side of the first latch 443 close to the accommodating cavity 17 , and the second latch 332 is stuck on a side of the first latch 443 away from the accommodating cavity 17 . At this time, the second latch 332 and the hook 334 clamp the first latch 443 from opposite sides of the first latch 443 , so that the first connecting portion 44 and the second connecting portion 33 are detachably connected.

In another embodiment, the outer side wall of the second connection part 33 is provided with an external thread, and the side wall of the first connection part 44 close to the second liquid taking through hole 43 is provided with an inner thread, so that the first connection part 44 is connected with the second connection part 44 . Section 33 is threaded.

Please refer to FIG. 9 to FIG. 11 , with reference to FIG. 4 and FIG. 5 , the pressing portion 22 includes a third side wall 221 . One end of the third side wall 121 is connected to the first top wall 25 . The third side wall 221 surrounds a liquid taking groove 222 , and the liquid taking groove 222 is coaxial with the first liquid taking through hole 13 and the second liquid taking through hole 43 . The liquid taking tube 31 is used for extending into or out of the liquid taking tank 222 , and the third side wall 221 is used for abutting or loosening the side wall of the liquid taking tube 31 , so that the liquid taking tube 31 is deformed or deformed to release Liquid or sucking liquid.

In this embodiment, the aperture of the liquid taking tank 222 increases along the direction away from the second top wall 12 , that is, the liquid taking tank 222 is a conical cavity.

In this embodiment, a pressing block 223 is provided on the surface of the third side wall 221 close to the liquid taking tank 222 . The liquid taking tube 31 extends into the liquid taking tank 222 , and the pressing block 223 abuts the side wall of the liquid taking tube 31 to deform the liquid taking tube 31 and discharge the air or liquid inside the liquid taking tube 31 . When the liquid taking tube 31 exits the liquid taking tank 222 in reverse, the liquid taking tube 31 recovers its deformation to absorb the liquid.

In this embodiment, the opposite sides of the third side wall 221 are close to one side of the liquid taking tank 222 to form two pressing blocks 223 , and the two pressing blocks 223 are used to squeeze the liquid taking tube 31 from opposite sides of the liquid taking tube 31 . The liquid taking tube 31 can make the liquid taking tube 31 deform evenly, and quantitative liquid taking can be realized by the deformation amount of the liquid taking tube 31, and the deformation amount of the liquid taking tube 31 can be determined by the distance between the two extrusion blocks 223. to set. It can be understood that, the pressing block 223 can also be provided as an integral pressing block 223 , that is, a ring of pressing blocks 223 is provided on the third side wall 221 .

Please refer to FIG. 8 and FIG. 9 , the housing 1 further includes a chute 15 disposed on the inner surface of the first side wall 11 . The chute 15 extends along the central axis a of the accommodating cavity 17 , and the pressing body 21 of the pressing mechanism 2 Guide strips 24 are provided near the surface of the housing 1 . When the pressing mechanism 2 is placed in the accommodating cavity 17 of the housing 1 and reciprocates along the central axis a of the accommodating cavity 17 , the guide bar 24 can be snapped into the chute 15 and move back and forth along the chute 15 . The cooperation of 15 and the guide strip 24 can play the role of a guide and a limiting element for the pressing mechanism 2 .

Please refer to FIG. 8 to FIG. 10 . Referring to FIG. 4 and FIG. 5 in combination, the liquid transfer device 100 further includes a positioning member 5 . The positioning member 5 includes a sliding portion 52 and a positioning portion 51 , and the positioning portion 51 is disposed on the first side wall. 11. The sliding portion 52 is accommodated in the accommodating cavity 17 . The pressing mechanism 2 further includes a sliding track 23 corresponding to the sliding portion 52 , the sliding track 23 extends along the central axis a of the accommodating cavity 17 , and the sliding portion 52 is used for reciprocating movement along the sliding track 23 , thereby restricting the sliding track 23 along the sliding track 23 . The distance of the reciprocating movement of the central axis a of the accommodating cavity 17 serves to connect the housing 1 and the pressing mechanism 2 at the same time.

In this embodiment, the first side wall 11 of the housing 1 is provided with a positioning hole 14 corresponding to the positioning portion 51 , and the positioning portion 51 is snapped into the positioning hole 14 to realize the connection between the positioning member 5 and the housing 1 .

In this embodiment, a connecting portion 53 is provided between the positioning portion 51 and the sliding portion 52 .

In this embodiment, the positioning member 5 includes two positioning portions 51 , and the corresponding first side walls 11 are provided with two positioning holes 14 , so there are also two connecting portions 53 .

In this embodiment, the two positioning parts 51 , the two connecting parts 53 and the sliding part 52 form a U-shaped structure, the sliding track 23 is a long opening that penetrates through the pressing body 21 , and the sliding part 52 of the positioning member 5 is embedded in this Move within the opening, this design can better define the movement of the pressing mechanism 2 .

Please refer to FIGS. 3 , 4 to 7 , the liquid transfer device 100 further includes an elastic member 6 accommodated in the accommodating cavity 17 . One end of the elastic member 6 abuts against the first top wall 25 , and the other end against the second top wall 12 . During the downward movement of the pressing mechanism 2 relative to the housing 1, the elastic member 6 is compressed. When the pressing mechanism 2 is released, the elastic member 6 recovers its deformation, and the deformation restoring force of the elastic member 6 drives the pressing mechanism 2 to automatically return to its original shape. bit. The elastic member 6 can be installed in the accommodating cavity 17 when the housing 1 and the pressing mechanism 2 are assembled, and will not affect the later replacement of the liquid taking assembly 3 .

4 to 7 in conjunction with the positioning member 5, when the pressing mechanism 2 is pressed down and the elastic member 6 is in a compressed state, the sliding portion 52 is located at the upper end of the stroke of the sliding track 23; when the pressing mechanism 2 returns to the initial state, the elastic member When the 6 is in the natural extension state, the sliding portion 52 is located at the lower end of the stroke of the sliding rail 23 . Therefore, by the cooperation of the positioning member 5 and the elastic member 6, the stroke of the reciprocating movement of the pressing mechanism 2 can be accurately limited to realize quantitative liquid extraction, and at the same time, the automatic recovery of the pressing mechanism 2 can be ensured.

In this embodiment, the elastic member 6 is sleeved on the outside of the pressing part 22 , so that when the pressing mechanism 2 moves downward, the pressing force of the pressing part 22 on the liquid taking tube 31 is more balanced and the liquid taking precision is improved.

In another embodiment, the number of the elastic members 6 can be multiple, and the multiple elastic members 6 are arranged around the pressing portion 22, which can balance the pressing force, so that the pressing force on the liquid taking tube 31 is uniform, which is helpful for quantification. Take the liquid.

Please refer to FIG. 14 , in conjunction with FIG. 4 and FIG. 5 , the liquid taking tube 31 is a hollow tubular structure with one end open and the cross section is approximately a circle, the second connecting portion 33 is approximately a ring, the liquid taking head 32 is a hollow tubular structure with openings at both ends, one end of the second connecting portion 33 is connected with one end of the liquid taking head 32, and the other end is connected with the open end of the liquid taking pipe 31, so that the liquid taking pipe 31 is connected by the second The connecting portion 33 communicates with the liquid sampling head 32 .

In this embodiment, the second connecting portion 33 and the liquid taking head 32 are integrally constructed, and the liquid taking pipe 31 is detachably installed on the second connecting portion 33 , so that the liquid taking head 32 and the liquid taking pipe 31 communicate with each other. Specifically, the liquid sampling assembly 3 can be molded together by an injection molding process. During the injection molding process, the cavity for molding the second connecting portion 33 and the liquid sampling head 32 is communicated with the cavity for molding the liquid sampling tube 31, and the injection molding can be performed at the same time. molding, shorten the molding cycle, improve efficiency, and reduce the manufacturing cost of the liquid sampling assembly 3 at the same time. After molding, the open end of the liquid taking tube 31 is connected with the connecting part body 331 of the second connecting part 33 by a plastic strip, the plastic strip can be broken during use, and the liquid taking tube 31 is covered on the second connecting part 33 , assemble to obtain a liquid taking assembly 3 for use.

In this embodiment, the liquid taking tube 31 is made of rubber material, and the outer diameter of the open end of the liquid taking tube 31 can be designed to be slightly larger than the inner diameter of the second connecting portion 33, so that the two can be sealed by interference fit. .

In this embodiment, the cross section of the liquid taking tube 31 along the center axis a perpendicular to the receiving cavity 17 gradually decreases from the end close to the liquid taking head 32 to the end far from the liquid taking head 32 , that is, the liquid taking tube 31 Roughly in the shape of an inverted cone.

In this embodiment, the liquid taking assembly 3 further includes a liquid taking head cover (not shown), which is used to cover the end of the liquid taking head 32 away from the liquid taking pipe 31 to prevent the liquid taking head 32 from being polluted.

It can be understood that, in another embodiment, the liquid taking head (not shown in the figure) of the liquid taking assembly 3 can also be a tubular structure with one end open and the other end closed. The open end of the liquid taking head is connected to the second connecting part. 33 is connected, and then communicated with the liquid taking pipe 31, when in use, the closed end of the liquid taking head is broken and inserted into the liquid to carry out liquid taking. , which helps to reduce costs.

Referring to FIG. 4 , the pressing mechanism 2 further includes a pressing portion 26 . The pressing portion 26 is disposed at the end of the pressing body 21 away from the first top wall 25 . By pressing the pressing portion 26 , the pressing mechanism 2 is positioned relative to the casing 1 purpose of the movement.

In this embodiment, the cross section of the pressing portion 26 along the direction perpendicular to the central axis a of the accommodating cavity 17 is larger than the opening size of the end of the first side wall 11 away from the second top wall 12 , so as to ensure that when the pressing portion 26 is pressed, the The pressing portion 26 is not allowed to enter the accommodating cavity 17 .

Please refer to FIG. 15 , in conjunction with FIG. 3 to FIG. 5 , the specific assembly process of the liquid transfer device 100 is as follows:

In the first step, the elastic member 6 is put into the accommodating cavity 17 of the housing 1 , and then the pressing mechanism 2 is engaged with the housing 1 to fix the elastic member 6 .

The second step is to install the connector 4 on the housing 1;

In the third step, the plastic strip between the liquid taking tube 31 and the second connecting portion 33 is broken, and the liquid taking tube 31 is covered at the second connecting portion 33 .

The fourth step is to extend the liquid taking assembly 3 into the accommodating cavity 17 through the second liquid taking through hole 43 and the first liquid taking through hole 13 in sequence, and connect the second connecting part 33 to the first connecting part 44 of the connecting piece 4 . After engaging, fix the liquid taking assembly 3 on the connector 4 to complete the assembly.

In addition, when one liquid collection is completed, the liquid collection assembly 3 needs to be replaced. The liquid collection assembly 3 can be removed from the connector 4 and replaced with a new liquid collection assembly 3. The installation method is the same as above.

In the present invention, the housing 1, the pressing mechanism 2 and the connecting piece 4 are pre-assembled, and the liquid taking assembly 3 extends from the outer side of the connecting piece 4 into the accommodating cavity 17, so as to be detachably installed on the connecting piece 4, and it is convenient to replace the liquid taking piece at any time. Component 3. Specifically, the liquid taking assembly 3 can be a one-time consumable, and the liquid taking assembly 3 can be replaced at any time according to actual needs. The housing 1, the pressing mechanism 2 and the connecting piece 4 can be reused, which can reduce the cost.

Please refer to FIG. 4 and FIG. 5 again, and refer to FIG. 6 and FIG. 7 in combination. When in use, press the pressing part 26 to press down the pressing mechanism 2 , and the sliding part 52 moves upward relative to the sliding track 23 and moves to the sliding track 23 At the top of the stroke, the pressing portion 22 moves downward relative to the liquid taking tube 31. At this time, the elastic member 6 is compressed, and the squeezing block 223 presses the liquid taking tube 31 to discharge the air inside the liquid taking tube 31; One end of 32 is inserted into the liquid, the pressing part 26 is released, the pressing mechanism 2 returns to its original position driven by the resilience of the elastic member 6, and the sliding part 52 moves downward relative to the sliding track 23 to the lower end of the stroke of the sliding track 23 , the pressing block 223 moves upward relative to the liquid taking pipe 31 to loosen the liquid taking pipe 31, and the detection liquid will be sucked into the liquid taking pipe 31 to achieve the purpose of quantitative liquid taking. Pressing the pressing part 26 again can release the liquid in the liquid sampling tube 31 .

Please refer to FIG. 4 and FIG. 5 . Specifically, the principle of the liquid transfer device 100 for quantitatively taking liquid is: the inner diameter d1 of the end of the tapered part of the liquid taking pipe 31 away from the liquid taking head 32 is small, which is called the small inner diameter end b, The inner diameter d2 of the end close to the liquid sampling head 32 is larger, which is called the large inner diameter end c. As shown in FIG. 4 , when the liquid taking tube 31 is not compressed, its small inner diameter end b is located at the bottom of the two pressing blocks 223 , and the surfaces of the two pressing blocks 223 contact the top of the liquid taking tube 31 . As shown in FIG. 5 , when the pressing mechanism 2 moves downward, the small inner diameter end b of the liquid taking tube 31 extends into the liquid taking tank 222, the liquid taking tube 31 extends between the two extrusion blocks 223, and the two squeeze The block 223 squeezes the side wall of the liquid taking pipe 31, so that the liquid taking pipe 31 is compressed, and the liquid taking pipe 31 is further extended into the liquid taking tank 222 until the two extrusion blocks 223 are squeezed to the large inner diameter of the liquid taking pipe 31. end c, and then discharge the quantitative air inside the liquid taking tube 31 . After inserting the liquid taking head 32 into the liquid, loosen the upper casing 1, the resilient force of the elastic member 6 will spring the pressing mechanism 2 back to its original position, so that the liquid taking tube 31 is withdrawn from between the two pressing blocks 223, and the liquid taking tube The deformation of 31 is restored to achieve the purpose of absorbing liquid. By designing the values of d1 and d2 of the tapered structure of the liquid sampling pipe 31, the distance between the two extrusion blocks 223, the contact area between the two extrusion blocks 223 and the liquid sampling pipe 31, the inner diameter of the liquid sampling tank 222 and the pressing mechanism 2 The relative parameters such as the movement stroke of the housing 1, so as to achieve the purpose of quantitatively taking liquid.

The liquid transfer device 100 provided by the present invention can be used to transfer various liquid samples. For example, the liquid samples can include biological samples, patient samples, veterinary samples, or environmental samples.

In some embodiments, the liquid transfer device 100 provided by the present invention can be used to collect and dispense volumes between 1 μl and 5 ml (eg 1 μl, 2 μl, 4 μl, 5 μl, 10 μl, 20 μl, 50 μl, 100 μl liters, 200 μl, 500 μl, 1 ml, 2 ml and 5 ml of any number between any two numbers) of the liquid.

Compared with the prior art, the liquid transfer device provided by the present invention has a simple structure and simple operation, can achieve quantitative liquid absorption, and can realize the transfer of a small amount of liquid; and the liquid sampling assembly and the pressing mechanism can be detachably arranged, and the pressing mechanism can be used multiple times. , The liquid collection component is a one-time consumable, which can be replaced at any time, saving costs.

100: Liquid transfer device 1: Shell 11: The first side wall 12: Second top wall 13: The first liquid sampling through hole 14: Positioning hole 15: Chute 16: Card slot 17: accommodating cavity 2: Pressing mechanism 21: Press the body 22: Extrusion Department 221: Third side wall 222: Liquid extraction tank 223: Squeeze Block 23: Sliding track 24: Guide bar 25: First top wall 26: Pressing part 3: Liquid collection components 31: Pipette 32: Liquid extraction head 33: Second connecting part 331: connector body 332: The second card position 333: Guide rod 334: hook 4: Connectors 41: Second side wall 42: Third top wall 43: The second liquid sampling through hole 44: The first connecting part 441: The first bayonet 442: Second bayonet 443: The first card position 45: Card block 5: Positioning parts 51: Positioning part 52: Sliding part 53: Connection part 6: elastic parts a: central axis b: Small inner diameter end c: Large inner diameter end

FIG. 1 is a schematic structural diagram of an unpressed liquid transfer device provided by an embodiment of the present invention.

2 is a schematic structural diagram of a liquid transfer device provided by an embodiment of the present invention after being pressed.

3 is an exploded view of a liquid transfer device provided by an embodiment of the present invention.

FIG. 4 is a cross-sectional view along IV-IV of the liquid transfer device provided in FIG. 1 .

FIG. 5 is a cross-sectional view along V-V of the liquid transfer device provided in FIG. 2 .

FIG. 6 is a cross-sectional view along VI-VI of the liquid transfer device provided in FIG. 1 .

FIG. 7 is a cross-sectional view of the liquid transfer device provided in FIG. 2 along VII-VII.

FIG. 8 is a schematic structural diagram of a casing provided by an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a pressing mechanism provided by an embodiment of the present invention.

10 is a cross-sectional view of a pressing mechanism according to an embodiment of the present invention.

11 is a schematic structural diagram of another angle of the pressing mechanism provided by an embodiment of the present invention.

12 and 13 are schematic structural diagrams of a connector provided by an embodiment of the present invention.

FIG. 14 is a schematic structural diagram of a liquid taking assembly provided by an embodiment of the present invention.

FIG. 15 is an assembly diagram of a pipetting device according to an embodiment of the present invention.

100: Liquid transfer device

1: Shell

2: Pressing mechanism

3: Liquid collection components

4: Connectors

5: Positioning parts

Claims (10)

A liquid transfer device, comprising: a pressing mechanism, comprising a pressing body, a first top wall provided at one end of the pressing body, and a pressing portion provided on the first top wall away from the pressing body; The casing includes a first side wall and a second top wall, the first side wall is connected to the second top wall and forms a accommodating cavity together, and the pressing mechanism is accommodated in the accommodating cavity and used for along the accommodating cavity The central axis of the cavity reciprocates; a connecting piece, comprising a second side wall and a first connecting part, the first connecting part is connected to the second side wall, and the second side wall is detachably connected to an end of the first side wall close to the second top wall; and The liquid taking assembly includes a liquid taking tube, a liquid taking head and a second connecting part connecting the liquid taking tube and the liquid taking head, and the liquid taking assembly is used to extend into the container from the second top wall cavity, so that the liquid taking tube is arranged corresponding to the pressing part, the liquid taking head is located outside the accommodating cavity, the second connecting part is detachably connected to the first connecting part, Wherein, the pressing mechanism is used for reciprocating movement along the central axis of the accommodating cavity, thereby driving the pressing portion to move back and forth relative to the liquid taking tube, so that the pressing portion abuts or releases the liquid taking the tube, so that the liquid taking tube is deformed, so that the liquid taking tube releases or absorbs the liquid. The liquid transfer device according to claim 1, further comprising a positioning member, the positioning member comprising a sliding portion and a positioning portion, the positioning portion is provided on the first side wall, and the sliding portion is accommodated in the accommodating portion The pressing mechanism further includes a sliding track corresponding to the sliding portion, the sliding track extending along the central axis of the accommodating cavity, and the sliding portion is used for reciprocating movement along the sliding track, thereby restricting the pressing mechanism The distance of reciprocating movement along the central axis of the accommodating cavity. The liquid transfer device according to claim 1, wherein the pressing part comprises a third side wall, one end of the third side wall is connected to the first top wall, and the third side wall is connected to the first top wall A liquid taking tank is formed around, and the liquid taking tank is coaxial with the accommodating cavity; The aperture of the liquid taking tank increases along the direction away from the first top wall, the liquid taking pipe is used to extend into or out of the liquid taking tank, and the third side wall is used to resist or loosen the liquid taking tank. liquid pipe. The liquid transfer device according to claim 3, wherein the inner diameter of the liquid taking pipe along a direction perpendicular to the central axis of the accommodating cavity decreases from an end close to the liquid taking head to an end far from the liquid taking head . The liquid transfer device according to claim 3, wherein an inner surface of the third side wall is provided with a pressing block, and the pressing block is used to abut or release the liquid taking tube. The liquid transfer device according to claim 1, wherein the pressing mechanism further comprises an elastic member accommodated in the accommodating cavity, one end of the elastic member abuts against the first top wall, and the other end abuts against the first top wall. the second top wall, and the elastic restoring force of the elastic member is used to move the pressing mechanism away from the second top wall. The liquid transfer device according to claim 6, wherein the elastic member is sleeved on the outer side of the pressing portion; or There are a plurality of the elastic members, and the plurality of the elastic members are arranged around the liquid taking tube. The liquid transfer device according to claim 1, wherein the first connection part is snap-connected or screwed to the second connection part; The first side wall and the second side wall are snap-connected or screwed. The liquid transfer device of claim 8, wherein the connecting member includes a third top wall connected to the second side wall, and the first connecting portion includes a first bayonet extending through the third top wall , a second bayonet and a first bayonet that penetrate the third top wall and communicate with the first bayonet; The second connecting portion includes a connecting portion body, a second latching position disposed on the connecting portion body, a guide rod disposed on the connecting portion body, and a hook disposed on the guide rod, Wherein, the guide rod extends into the first bayonet and is clamped into the second bayonet, the hook is clamped on the side of the first bayonet close to the accommodating cavity, the second bayonet The card position is clamped on a side of the first card position away from the accommodating cavity, so that the first connection part and the second connection part are detachably connected. The liquid transfer device according to claim 1, wherein one end of the pressing body away from the liquid taking assembly extends out of the casing to form a pressing portion; The surface of the pressing body close to the casing is provided with a guide bar, the inner surface of the first side wall is provided with a chute, the chute extends along the central axis of the accommodating cavity, and the guide bar is used for clamping into the chute and reciprocate along the chute.

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