CN114308169A - Liquid transfer device - Google Patents
Liquid transfer device Download PDFInfo
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- CN114308169A CN114308169A CN202110604887.5A CN202110604887A CN114308169A CN 114308169 A CN114308169 A CN 114308169A CN 202110604887 A CN202110604887 A CN 202110604887A CN 114308169 A CN114308169 A CN 114308169A
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Abstract
A liquid transfer device comprises a pressing mechanism and a liquid taking assembly, wherein the pressing mechanism comprises an upper shell and a lower shell, the upper shell comprises a first top wall and an extrusion part, the first top wall and the lower shell are surrounded to form a containing cavity, and the upper shell is contained in the containing cavity; get liquid subassembly and include liquid intaking pipe, liquid intaking head and first connecting portion, get liquid subassembly and stretch into by the second roof and hold the chamber, liquid intaking pipe corresponds the extrusion portion setting, and second roof is located to first connecting portion detachably, and liquid intaking head is located and holds the chamber outside. The upper shell moves along the central shaft of the accommodating cavity, and then the extrusion part is driven to move relative to the liquid taking pipe, so that the extrusion part abuts against or releases the liquid taking pipe to realize liquid transfer. The liquid transfer device can quantitatively absorb liquid; and get the liquid subassembly removable, pressing mechanism reuse practices thrift the cost.
Description
Technical Field
The invention relates to the technical field of liquid transfer, in particular to a liquid transfer device.
Background
Many existing diagnostic tests related to biological reactions need to be completed in a professional laboratory, equipment is complex, the size is large, the cost is high, the operation is complex, especially the requirements of sample transfer and sample adding processes on professional levels of operators are high, the operation needs to be carried out by skilled technicians, and household portable detection cannot be realized.
Disclosure of Invention
In view of the above, in order to solve at least one of the above drawbacks, it is necessary to provide a liquid transfer device.
The invention provides a liquid transfer device which comprises a pressing mechanism and a liquid taking assembly. Pressing mechanism includes casing and lower casing, go up the casing include first lateral wall and with the first roof that first lateral wall is connected, be equipped with an extrusion portion on the first roof, the casing includes second lateral wall and second roof down, the second lateral wall is connected the second roof just encloses to establish and forms one and hold the chamber, go up the casing accept in hold the intracavity. The liquid taking assembly comprises a liquid taking pipe, a liquid taking head and a first connecting portion communicated with the liquid taking pipe and the liquid taking head, the liquid taking assembly is used for enabling the second top wall to extend into the accommodating cavity, so that the liquid taking pipe corresponds to the extrusion portion, the first connecting portion is detachably arranged on the second top wall, and the liquid taking head is located on the outer side of the accommodating cavity. The upper shell is used for reciprocating along a central shaft of the containing cavity, so that the extrusion part is driven to reciprocate relative to the liquid taking pipe, the extrusion part is made to abut against or release the liquid taking pipe, the liquid taking pipe is made to deform, and the liquid taking pipe releases or absorbs liquid.
In the embodiment of the application, the lower shell further comprises a first liquid taking through hole and a second connecting portion, the first liquid taking through hole is formed in the second top wall, the second connecting portion is formed in the second top wall and located around the first liquid taking through hole, when the liquid taking pipe extends into the accommodating cavity through the first liquid taking through hole, the first connecting portion and the second connecting portion can be detachably connected.
In an embodiment of the present invention, the first connecting portion and the second connecting portion are engaged with each other or screwed to each other.
In the embodiment of the application, the first connecting portion includes the connecting portion body, set up in first screens on the connecting portion body, set up the guide arm on the connecting portion body and set up in trip on the guide arm. The second connecting portion include run through the first bayonet socket of second roof, run through the second roof and with second bayonet socket and the second screens of first bayonet socket intercommunication. The guide rod is inserted into the first bayonet and clamped into the second bayonet through the second top wall, the hook is clamped at one side of the accommodating cavity, the second clamping position is close to one side of the accommodating cavity, the first clamping position is clamped at one side of the accommodating cavity, and the first connecting portion and the second connecting portion are detachably connected.
In an embodiment of the application, the extruding portion includes a third side wall, one end of the third side wall is connected to the first top wall, a second liquid taking through hole is formed by the third side wall in a surrounding manner, and the second liquid taking through hole is communicated with the first liquid taking through hole and is coaxial with the accommodating cavity; the aperture of the second liquid taking through hole decreases progressively along the direction far away from the second liquid taking through hole, the liquid taking pipe is used for extending into or withdrawing from the second liquid taking through hole, and the third side wall is used for abutting against or loosening the liquid taking pipe.
In the embodiment of the application, get the liquid pipe along the perpendicular the internal diameter of the center pin direction of holding the chamber by being close to get the one end of liquid head to keeping away from get the one end of liquid head and decrement.
In the embodiment of the application, the inner surface of the third side wall is provided with an extrusion block, and the extrusion block is used for abutting against or loosening the liquid taking pipe.
In an embodiment of the application, the pressing mechanism further includes an elastic member sleeved in the accommodating cavity, one end of the elastic member abuts against the first top wall, the other end of the elastic member abuts against the second top wall, and an elastic restoring force of the elastic member is used for enabling the upper shell to move away from the lower shell.
In an embodiment of the present application, the elastic member is a plurality of elastic members, and the plurality of elastic members are disposed around the liquid taking tube, or the elastic members are sleeved outside the pressing portion.
In an embodiment of the present application, the liquid transfer device further includes a pressing key, and the pressing key is disposed at one end of the upper housing, which is far away from the lower housing.
Compared with the prior art, the liquid transfer device provided by the invention has the advantages that the structure is simple, the operation is simple and convenient, the liquid can be quantitatively absorbed, and the transfer of trace liquid can be realized; and get liquid subassembly and pressing mechanism and can dismantle the setting, pressing mechanism can repetitious usage, gets the liquid subassembly and be disposable consumptive material, can change at any time, practices thrift the cost.
Drawings
Fig. 1 is a schematic non-pressed structure of a liquid transfer device according to an embodiment of the present invention.
Fig. 2 is a schematic view of a pressed structure of a liquid transfer device according to an embodiment of the present invention.
Fig. 3 is an exploded view of a liquid transfer device according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view of the liquid transfer device provided in fig. 1 taken along IV-IV.
Fig. 5 is a cross-sectional view of the liquid transfer device provided in fig. 2 taken along V-V.
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 a liquid transfer device according to another embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an upper housing according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of an upper housing at another angle according to an embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a lower housing according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of the lower housing at another angle according to an embodiment of the present invention.
Fig. 12 is a schematic structural view of a liquid transfer device according to another embodiment of the present invention.
Fig. 13 is a cross-sectional view of a liquid transfer device according to another embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
The system embodiments described below are merely illustrative, and the division of the modules or circuits is merely a logical division, and other divisions may be realized in practice. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units or means recited in the system claims may also be implemented by one and the same unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Unless defined otherwise, 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 terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to fig. 6, a liquid transfer device 100 according to an embodiment of the present invention is shown, where the liquid transfer device 100 includes a pressing mechanism 10 and a liquid fetching assembly 3. The pressing mechanism 10 includes an upper housing 1 and a lower housing 2, the upper housing 1 includes a first side wall 11 and a first top wall 13 connected to the first side wall 11, the first top wall 13 is provided with a pressing portion 12, the lower housing 2 includes a second side wall 21 and a second top wall 22, the second side wall 21 is connected to the second top wall 22 and encloses to form a containing cavity 4, and the upper housing 1 is contained in the containing cavity 4. This liquid fetching component 3 includes liquid fetching tube 31, liquid fetching head 32 and the first connecting portion 33 that communicates this liquid fetching tube 31 and this liquid fetching head 32, and this liquid fetching component 3 is used for being kept away from one side that holds chamber 4 by second roof 22 and stretches into this chamber 4 that holds to make this liquid fetching tube 31 correspond extrusion portion 12 and set up, this first connecting portion 33 detachably sets up in second roof 22, and this liquid fetching head 32 is located this second roof 22 and keeps away from one side that should hold chamber 4. The upper shell 1 is used for reciprocating along a central axis a of the accommodating cavity 4, and further drives the squeezing portion 12 to reciprocate relative to the liquid taking tube 31, so that the squeezing portion 12 abuts against or releases the liquid taking tube 31, the liquid taking tube 31 is deformed, and the liquid taking tube 31 releases or absorbs liquid. According to the invention, the pressing mechanism 10 is assembled in advance, and the liquid taking component 3 extends into the accommodating cavity 4 from the outer side of the pressing mechanism 10 through the first liquid taking through hole 23, so that the liquid taking component 3 can be detachably mounted on the pressing mechanism 10, and is convenient to replace at any time. Specifically, get liquid subassembly 3 and can be disposable consumables, get liquid subassembly 3 according to actual need replacement at any time, pressing means 10 can used repeatedly, can reduce cost.
Referring to fig. 10 and 11, the lower housing 2 further includes a first liquid-taking through hole 23 and a second connecting portion 24 disposed on the second top wall 22, and the second connecting portion 24 is disposed on the second top wall 22 and around the first liquid-taking through hole 23. When the liquid taking tube 31 extends into the accommodating chamber 4 through the first liquid taking through hole 23, the first connecting part 33 is detachably connected with the second connecting part 24.
In this embodiment, the first connecting portion 33 includes a connecting portion body 331, a first locking portion 332 disposed on the connecting portion body 331, a guide rod 333 disposed on the connecting portion body 331, and a locking hook 334 disposed on the guide rod 333. The second connection portion 24 includes a first bayonet 241 penetrating the second top wall 22, a second bayonet 242 penetrating the second top wall 22 and communicating with the first bayonet 241, and a second detent 243. Wherein, the guide rod 333 is kept away from the one side that holds the chamber 4 by the second roof 22 and is stretched into first bayonet 241 and block into second bayonet 242 in, trip 334 card is close to the one side that holds the chamber 4 at second screens 243, and first screens 332 card is kept away from the one side that holds the chamber 4 at second screens 243, and at this moment, first screens 332 and trip 334 block second screens 243 from the relative both sides of second screens 243 to make first connecting portion 33 can dismantle with second connecting portion 24 and be connected.
In another embodiment, the outer side wall of the first connecting portion 33 is provided with an external thread, and the side wall of the second connecting portion 24 close to the first tapping hole 23 is provided with an internal thread, so that the first connecting portion 33 is screwed with the second connecting portion 24.
Referring to fig. 8 and 9 in combination with fig. 4 and 5, the pressing portion 12 includes a third sidewall 121. The third side wall 121 is connected at one end to the first top wall 13. The third sidewall 121 encloses and forms a second liquid taking through hole 122, and the second liquid taking through hole 122 is coaxial with the first liquid taking through hole 23. The aperture of the second liquid taking through hole 122 decreases progressively along the direction away from the first liquid taking through hole 23. The liquid taking tube 31 is used for extending into or exiting from the second liquid taking through hole 122 through the first liquid taking through hole 23, and the third side wall 121 is used for abutting against or releasing the side wall of the liquid taking tube 31, so that the liquid taking tube 31 deforms or recovers to deform to release liquid or absorb liquid.
In this embodiment, a pressing block 123 is disposed on the surface of the third sidewall 121 close to the second liquid-extracting through hole 122. The liquid-taking tube 31 sequentially passes through the first liquid-taking through hole 23 and the accommodating cavity 4, and finally extends into the second liquid-taking through hole 122, and the pressing block 123 abuts against the side wall of the liquid-taking tube 31, so that the liquid-taking tube 31 is deformed, and air or liquid in the liquid-taking tube 31 is discharged. When the liquid taking tube 31 reversely exits the second liquid taking through hole 122, the liquid taking tube 31 is deformed to suck the liquid.
In this embodiment, the number of the pressing blocks 123 is two, two pressing blocks 123 are respectively disposed on the opposite inner surfaces of the third sidewall 121, and the two pressing blocks 123 are used for pressing the liquid taking tube 31 from the opposite sides of the liquid taking tube 31, so that the liquid taking tube 31 can be uniformly deformed, a fixed amount of 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 set by the distance between the two pressing blocks 123. It will be appreciated that the pressing block 123 may also be provided as a one-piece pressing block 123, i.e. a ring of pressing blocks 123 is provided on the third side wall 121.
Referring to fig. 8 and 9, the upper housing 1 further includes a fourth sidewall 14 disposed at an end of the first sidewall 11 away from the first top wall 13, and a platform portion 15 connecting the fourth sidewall 14 and the first sidewall 11. The second side wall 21 of the lower casing 2 is sleeved on the outer side of the first side wall 11 of the upper casing 1, the end surface of the second side wall 21 supports against the platform part 15, and the upper casing 1 performs a limiting function when reciprocating along the central axis a of the accommodating cavity 4 relative to the lower casing 2.
Referring to fig. 8 and 9, the upper housing 1 further includes a positioning through hole 16 disposed on the first top wall 13 and a sliding slot 17 disposed on an outer surface of the first side wall 11. The second side wall 21 of the lower housing 2 is provided with a guide strip 25 corresponding to the slide groove 17, and the guide strip 25 can be snapped into the slide groove 17. This second roof 22 of lower casing 2 corresponds positioning hole 16 and is provided with locating lever 26, and locating lever 26 can stretch into positioning hole 16 in and block the surface at second roof 22. When the upper case 1 reciprocates relative to the lower case 2, the guide bar 25 can move along the slide groove 17, and the positioning rod 26 can move along the positioning through hole 16, so that the upper case 1 and the lower case 2 do not separate.
Referring to fig. 3, 6 and 7, the pressing mechanism 10 further includes an elastic member 5. One end of the elastic member 5 abuts against the first top wall 13, and the other end abuts against the second top wall 22. In the process that the upper shell 1 moves downwards relative to the lower shell 2, the elastic piece 5 is compressed, after the upper shell 1 is loosened, the elastic piece 5 restores to deform, and the deformation restoring force of the elastic piece 5 drives the upper shell 1 to automatically return. The elastic piece 5 can be installed in the accommodating cavity 4 when the pressing mechanism 10 is assembled, and the liquid taking assembly 3 cannot be replaced in the later period.
In this embodiment, the elastic member 5 may be a spring, and in order to fix the elastic member 5, the first top wall 13 is provided with a first positioning groove 18, the second top wall 22 is provided with a spring guide 27, and the spring guide 27 can extend into the first positioning groove 18. One end of the elastic member 5 is sleeved on the spring guide rod 27, and the other end thereof extends into the first positioning groove 18. The sum of the depth of the first positioning groove 18 and the height of the spring guide rod 27 is equal to the length of the elastic part 5 in a natural state, when the upper shell 1 drives the first positioning groove 18 to move towards the spring guide rod 27, the spring guide rod 27 extends into the first positioning groove 18, the elastic part 5 is compressed, and thus the first positioning groove 18 can play a limiting role in the part of the spring guide rod 27 where the elastic part 5 is not sleeved, and the deviation in the compression process of the elastic part 5 is avoided.
In this embodiment, the number of the elastic members 5 may be plural, and the plurality of elastic members 5 are provided around the liquid taking tube 31 to balance the pressing force, thereby making the pressing force applied to the liquid taking tube 31 uniform and contributing to quantitative liquid taking.
In another embodiment, a second positioning groove 19 is formed by protruding the first top wall 13 toward a side away from the accommodating cavity 4, the pressing portion 12 penetrates through the bottom of the second positioning groove 19, the elastic member 5 is sleeved outside the pressing portion 12 and embedded in the second positioning groove 19, one end of the elastic member abuts against the bottom surface of the second positioning groove 19, and the other end of the elastic member abuts against the second top wall 22. When the liquid taking assembly 3 is installed, the liquid taking pipe 31 passes through the elastic member 5 via the first liquid taking through hole 23 and extends into the second liquid taking through hole 123 of the pressing part 12. By the design, when the liquid taking component 3 is replaced, the elastic part 5 is not influenced. It can be understood that, as shown in fig. 7, the elastic member 5 may be disposed in the first positioning groove 18 and the second positioning groove 19 at the same time, so that when the upper housing 1 moves downward, the pressing force of the pressing portion 12 on the liquid-taking tube 31 is more balanced, and the liquid-taking accuracy is improved.
Referring to fig. 12, referring to fig. 4 and fig. 5, the liquid taking tube 31 is a hollow tubular structure with an open end and a circular cross section, the first connecting portion 33 is a ring, the liquid taking head 32 is a hollow tubular structure with two open ends, one end of the first connecting portion 33 is connected to one end of the liquid taking head 32, and the other end is connected to the open end of the liquid taking tube 31, so that the liquid taking tube 31 is communicated with the liquid taking head 32 through the first connecting portion 33.
In the present embodiment, the first connection part 33 is integrated with the liquid extraction head 32, and the liquid extraction tube 31 is detachably attached to the first connection part 33 so that the liquid extraction head 32 communicates with the liquid extraction tube 31. Specifically, can will get liquid subassembly 3 and mould together through injection moulding technology, the in-process of moulding plastics, the first connecting portion 33 of shaping and the die cavity of getting liquid head 32 and the die cavity intercommunication of shaping liquid taking pipe 31 can carry out injection moulding simultaneously, shorten the shaping cycle, provide efficiency, reduce the manufacturing cost who gets liquid subassembly 3 simultaneously. After molding, the open end of the liquid taking tube 31 is connected with the connecting part body 331 of the first connecting part 33 through a plastic strip, which can be broken when in use, and the liquid taking tube 31 is covered at the first connecting part 33 and assembled to obtain the liquid taking component 3 for standby.
In the present embodiment, the liquid-taking tube 31 is made of rubber, and the outer diameter of the opening end of the liquid-taking tube 31 may be designed to be slightly larger than the inner diameter of the first connecting portion 33, so that the two are hermetically connected by interference fit.
In this embodiment, the cross section of the liquid taking tube 31 along the central axis a perpendicular to the accommodating chamber 4 gradually decreases from the end close to the liquid taking head 32 to the end far from the liquid taking head 32, i.e. the liquid taking tube 31 has a generally inverted cone structure.
Referring to fig. 1 to 3, the liquid taking assembly 3 further includes a liquid taking head cover 34, and the liquid taking head cover 34 is used for covering an end of the liquid taking head 32 far away from the liquid taking tube 31 to prevent the liquid taking head 32 from being contaminated.
It can be understood that, in another embodiment, the liquid taking head (not shown) of the liquid taking assembly 3 may 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 first connecting portion 33 and further communicated with the liquid taking tube 31, when in use, the closed end of the liquid taking head is broken and inserted into liquid to take liquid, the design of the liquid taking head avoids designing a liquid taking head cover separately, and the liquid taking head can be molded by opening the mold once, which is beneficial to reducing the cost.
Referring to fig. 4, the liquid transfer device 100 further includes a pressing key 6, the pressing key 6 covers an end of the fourth sidewall 14 of the upper housing 1 away from the first sidewall 11, for engaging with the upper housing 1, and the purpose of moving the upper housing 1 relative to the lower housing 2 is achieved by pressing the pressing key 6.
Referring to fig. 13 in conjunction with fig. 3-5, the liquid transfer device 100 is assembled as follows:
firstly, the pressing mechanism 10 is assembled, the elastic member 5 is firstly placed in the lower shell 2, then the upper shell 1 and the lower shell 2 are well clamped, the elastic member 5 is fixed, and then the pressing key 6 is installed on the upper shell 1.
Second, the liquid taking assembly 3 is assembled, the plastic strip between the liquid taking tube 31 and the first connecting portion 33 is broken, and the liquid taking tube 31 is covered at the first connecting portion 33.
And thirdly, extending the liquid taking component 3 into the accommodating cavity 4 of the pressing mechanism 10 through the first liquid taking through hole 23, clamping the first connecting part 33 with the second connecting part 24 of the lower shell 2, and fixing the liquid taking component 3 on the pressing mechanism 10 to finish assembly.
In addition, after once liquid taking is completed, the liquid taking assembly 3 needs to be replaced, the liquid taking assembly 3 can be taken down from the pressing mechanism 10, a new liquid taking assembly 3 is replaced, and the installation method is the same as the above.
Referring to fig. 4 and 5 again, when in use, the pressing key 6 is pressed to press the upper housing 1 downward, so that the first sidewall 11 moves downward along the second sidewall 21, the pressing portion 12 moves downward relative to the liquid taking tube 31, at this time, the elastic member 5 is compressed, the pressing block 123 presses the liquid taking tube 31, and the air inside the liquid taking tube 31 is discharged; one end of the liquid taking head 32 is inserted into the liquid, the pressing key 6 is released, the upper shell 1 is driven by the resilience force of the elastic piece 5 to return to the original position, the squeezing block 123 moves upwards relative to the liquid taking pipe 31 to release the liquid taking pipe 31, and the detection liquid is sucked into the liquid taking pipe 31, so that the purpose of quantitative liquid taking is achieved. Pressing the push button 6 again releases the liquid in the liquid extraction tube 31.
Referring to fig. 4 and 5, the principle of quantitative liquid extraction of the liquid transfer device 100 is as follows: the tapered portion of the liquid withdrawal tube 31 has a small inner diameter d1 at the end remote from the liquid withdrawal head 32, referred to as the small inner diameter end b, and a large inner diameter d2 at the end near the liquid withdrawal head 32, referred to as the large inner diameter end c. As shown in FIG. 4, when the liquid taking tube 31 is not compressed, the small inner diameter end b is located at the bottom of the two pressing blocks 123, and the surfaces of the two pressing blocks 123 contact the top end of the liquid taking tube 31. As shown in fig. 5, when the upper housing 1 moves downward, the small inner diameter end b of the liquid taking tube 31 extends into the second liquid taking hole 122, the liquid taking tube 31 extends between the two pressing blocks 123, the two pressing blocks 123 press the side wall of the liquid taking tube 31, so that the liquid taking tube 31 is compressed, the liquid taking tube 31 further extends into the second liquid taking hole 122, and the two pressing blocks 123 press the large inner diameter end c of the liquid taking tube 31, thereby discharging a certain amount of air inside the liquid taking tube 31. After the liquid taking head 32 is inserted into the liquid, the upper shell 1 is loosened, the resilience of the elastic piece 5 rebounds the upper shell 1 to the original position, so that the liquid taking pipe 31 is withdrawn from between the two extrusion blocks 123, the deformation of the liquid taking pipe 31 is recovered, and the purpose of sucking the liquid is achieved. The purpose of quantitative liquid taking is realized by designing parameters such as d1 and d2 values of the conical structure of the liquid taking pipe 31, the distance between the two squeezing blocks 123, the contact area of the two squeezing blocks 123 and the liquid taking pipe 31, the moving stroke of the upper shell 1 relative to the lower shell 2 and the like.
The liquid transfer device 100 provided by the present invention may be used to transfer a variety of liquid samples, for example, a liquid sample may include a biological sample, a patient sample, a veterinary sample, or an environmental sample.
In some embodiments, the liquid transfer device 100 provided herein can be used to collect and dispense liquids in volumes between 1 μ l and 5ml (e.g., numbers between any two of 1 microliter 1 μ l, 2 μ l, 4 μ l, 5 μ l, 10 μ l, 20 μ l, 50 μ l, 100 μ l, 200 μ l, 500 μ l, 1ml, 2ml, and 5 ml).
Compared with the prior art, the liquid transfer device provided by the invention has the advantages that the structure is simple, the operation is simple and convenient, the liquid can be quantitatively absorbed, and the transfer of trace liquid can be realized; and get liquid subassembly and pressing mechanism and can dismantle the setting, pressing mechanism can repetitious usage, gets the liquid subassembly and be disposable consumptive material, can change at any time, practices thrift the cost.
Claims (10)
1. A liquid transfer device, comprising:
the pressing mechanism comprises an upper shell and a lower shell, the upper shell comprises a first side wall and a first top wall connected with the first side wall, an extrusion part is arranged on the first top wall, the lower shell comprises a second side wall and a second top wall, the second side wall is connected with the second top wall and is surrounded to form a containing cavity, and the upper shell is contained in the containing cavity; and
the liquid taking assembly comprises a liquid taking pipe, a liquid taking head and a first connecting part for communicating the liquid taking pipe with the liquid taking head, the liquid taking assembly is used for extending into the accommodating cavity from the second top wall so that the liquid taking pipe is arranged corresponding to the extruding part, the first connecting part is detachably arranged on the second top wall, and the liquid taking head is positioned outside the accommodating cavity,
the upper shell is used for reciprocating along a central shaft of the containing cavity, so that the extrusion part is driven to reciprocate relative to the liquid taking pipe, the extrusion part is made to abut against or release the liquid taking pipe, the liquid taking pipe is made to deform, and the liquid taking pipe releases or absorbs liquid.
2. The liquid transfer device of claim 1, wherein the lower housing further comprises a first liquid-taking through hole disposed on the second top wall, and a second connecting portion disposed on the second top wall and located around the first liquid-taking through hole, wherein the first connecting portion is detachably connected to the second connecting portion when the liquid-taking tube extends into the accommodating cavity through the first liquid-taking through hole.
3. The liquid transfer device of claim 2, wherein the first connection portion is a snap-fit connection or a threaded connection with the second connection portion.
4. The liquid transfer device of claim 3, wherein the first connection portion comprises a connection portion body, a first detent disposed on the connection portion body, a guide rod disposed on the connection portion body, and a detent disposed on the guide rod;
the second connecting part comprises a first bayonet penetrating through the second top wall, a second bayonet penetrating through the second top wall and communicated with the first bayonet and a second clamping position,
the guide rod is inserted into the first bayonet and clamped into the second bayonet through the second top wall, the hook is clamped at one side of the accommodating cavity, the second clamping position is close to one side of the accommodating cavity, the first clamping position is clamped at one side of the accommodating cavity, and the first connecting portion and the second connecting portion are detachably connected.
5. The liquid transfer device according to claim 2, wherein the pressing portion comprises a third side wall, one end of the third side wall is connected with the first top wall, a second liquid taking through hole is formed by the third side wall in a surrounding manner, and the second liquid taking through hole is communicated with the first liquid taking through hole and is coaxial with the accommodating cavity;
the aperture of the second liquid taking through hole decreases progressively along the direction far away from the second liquid taking through hole, the liquid taking pipe is used for extending into or withdrawing from the second liquid taking through hole, and the third side wall is used for abutting against or loosening the liquid taking pipe.
6. The liquid transfer device of claim 5, wherein an inner diameter of the liquid taking tube in a direction perpendicular to the central axis of the accommodating chamber decreases from an end close to the liquid taking head to an end far from the liquid taking head.
7. The liquid transfer device of claim 5, wherein the inner surface of the third sidewall is provided with a squeezing block for abutting against or releasing the liquid take-off tube.
8. The liquid transfer device of claim 2, wherein the pressing mechanism further comprises an elastic member received in the receiving cavity, one end of the elastic member abuts against the first top wall, the other end abuts against the second top wall, and an elastic restoring force of the elastic member is used for moving the upper housing away from the lower housing.
9. The liquid transfer device of claim 8, wherein the resilient member is a plurality of resilient members disposed about the liquid take-off tube; or
The elastic piece is sleeved on the outer side of the extrusion part.
10. The liquid transfer device of claim 1, further comprising a push key disposed at an end of the upper housing distal from the lower housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/488,654 US20220097040A1 (en) | 2020-09-30 | 2021-09-29 | Liquid transfer device |
| PCT/CN2021/122431 WO2022068937A1 (en) | 2020-09-30 | 2021-09-30 | Nucleic acid testing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202063085368P | 2020-09-30 | 2020-09-30 | |
| US63/085368 | 2020-09-30 |
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| Publication Number | Publication Date |
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| CN114308169A true CN114308169A (en) | 2022-04-12 |
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Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110604887.5A Pending CN114308169A (en) | 2020-09-30 | 2021-05-31 | Liquid transfer device |
| CN202110604892.6A Pending CN114317221A (en) | 2020-09-30 | 2021-05-31 | Nucleic acid detection host and nucleic acid detection equipment |
| CN202110604882.2A Pending CN114308168A (en) | 2020-09-30 | 2021-05-31 | Liquid transfer device |
| CN202110737712.1A Pending CN114308170A (en) | 2020-09-30 | 2021-06-30 | Liquid transfer device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110604892.6A Pending CN114317221A (en) | 2020-09-30 | 2021-05-31 | Nucleic acid detection host and nucleic acid detection equipment |
| CN202110604882.2A Pending CN114308168A (en) | 2020-09-30 | 2021-05-31 | Liquid transfer device |
| CN202110737712.1A Pending CN114308170A (en) | 2020-09-30 | 2021-06-30 | Liquid transfer device |
Country Status (3)
| Country | Link |
|---|---|
| JP (3) | JP2022058157A (en) |
| CN (4) | CN114308169A (en) |
| TW (6) | TWD218529S (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114317221A (en) | 2022-04-12 |
| TW202214834A (en) | 2022-04-16 |
| JP2022058192A (en) | 2022-04-11 |
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| TW202214350A (en) | 2022-04-16 |
| TW202214351A (en) | 2022-04-16 |
| TW202219267A (en) | 2022-05-16 |
| TWI800843B (en) | 2023-05-01 |
| TW202215050A (en) | 2022-04-16 |
| CN114308168A (en) | 2022-04-12 |
| TWI800862B (en) | 2023-05-01 |
| CN114308170A (en) | 2022-04-12 |
| JP2022058157A (en) | 2022-04-11 |
| TWI799880B (en) | 2023-04-21 |
| TWD218529S (en) | 2022-05-01 |
| JP2022058163A (en) | 2022-04-11 |
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