Pipette capable of automatically replacing sampling inspection head

Abstract

The utility model provides a pipette capable of automatically replacing a sampling head, which comprises a pipetting mechanism, a probing and sucking mechanism and a replacing mechanism for automatically replacing the sampling head, the pipetting mechanism is used for transferring liquid into the pipette, the probing and sucking mechanism is used for sucking specific liquid substances, and the replacing mechanism is used for pressing and replacing the sampling head. The pipetting mechanism comprises a dip tube used for transferring liquid, a round opening is formed in the top end of the dip tube, the top end of the round opening communicates with a piston rod, a pushing piece is installed at the top end of a rod body of the piston rod in an attached mode, and an arc-shaped holding hook is installed on the side wall of a tube fitting of the dip tube. Liquid suction is achieved through the sleeving end of the dip tube and the conical sleeve at the bottom end, the conical sleeve is bound and limited through the sleeving state of the sleeve and the conical coating sleeve, and binding transfer of a specified gun head is achieved through the sleeving state of the conical coating sleeve and the corresponding conical sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of medical treatment, in particular to a liquid transfer gun capable of automatically replacing a sampling inspection head. Background Art

[0002] A pipette is a type of liquid transfer device commonly used in laboratories to transfer small or trace amounts of liquid. While pipettes come in different sizes and use tips of varying sizes, and their shapes vary slightly from manufacturer to manufacturer, their working principles and methods of operation are generally the same. Pipettes are precision instruments and require careful handling and storage to prevent damage and prevent changes in their measuring range.

[0003] Chinese patent application CN202021118422.6 discloses a pipette gun for automatically replacing pipette tips, comprising a pipette gun body, wherein the pipette gun body is fixedly connected to a shell, a through groove is provided on the shell and at the position of the liquid suction head of the pipette gun body, a square groove is provided in the shell and located on the right side of the through groove, a micro-pushing cylinder is fixedly connected at the center of the top of the square groove, a bottom plate is fixedly connected to the micro-pushing cylinder and located in the square groove, a micro-stepping motor is fixedly connected to the bottom of the bottom plate, a rotating plate is fixedly connected on the output shaft of the micro-stepping motor and located below the shell, and a gun tip slot is provided on the rotating plate. By arranging the micro-stepping motor, the micro-pushing cylinder, the shell, the rotating plate and the gun tip slot, the problem that the operator needs to manually replace multiple pipette tips of different capacities due to the need to transfer different volumes of liquid in the current experiment is solved, which is time-consuming, labor-intensive and has low work efficiency.

[0004] However, as a laboratory testing equipment, the pipette is a precision instrument and needs to ensure the cleanliness of the sample during the test. Therefore, cross-extraction of samples should be avoided during the test. However, the tip position of a conventional pipette cannot be changed according to the change of the sample. It is far from enough to only change the pipette tube. Therefore, it is necessary to make the tip of this type of pipette have the function of automatically replacing the sampling head. Utility Model Content

[0005] The purpose of the present invention is to provide a pipette with an automatically replaceable sampling head, so as to solve the problems in the above-mentioned background art that the pipette easily causes cross extraction of samples and the position of the end tip cannot be changed according to the change of the sample.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a pipette gun for automatically replacing a sampling inspection head, comprising a pipetting mechanism, a probe and suction mechanism, and a replacement mechanism for automatically replacing the inspection head;

[0007] The pipetting mechanism is used to transfer liquid into the pipette;

[0008] The suction mechanism is used to attract specific liquid substances;

[0009] The replacement mechanism acts as a pressing replacement for the sampling head;

[0010] The pipetting mechanism includes a dip tube for transferring liquid, the top of the dip tube is provided with a circular opening, the top of the circular opening is connected to a piston rod, the top of the piston rod is fitted with a push piece, and the side wall of the dip tube is provided with an arc-shaped gripping hook;

[0011] A timer is installed at the middle of the side wall of the dip tube, and an elastic dip sleeve is installed at the side of the dip tube.

[0012] As a preferred solution of the present invention: a strip block is installed on the side wall surface of the elastic suction sleeve, a suction sleeve is installed in the middle of the bottom end of the strip block, end brackets are installed at both ends of the suction sleeve, and the bottom end of the four corners of the end bracket is installed with a first sleeve.

[0013] As a preferred solution of the present invention: a detection and suction mechanism is installed at the bottom end of the first sleeve, and the detection and suction mechanism includes a first conical sleeve installed at the bottom of the first sleeve, and a side wall bracket is installed on the side of the first conical sleeve, and a buffer spring is provided in the middle of the side wall of the side wall bracket.

[0014] As a preferred solution of the present invention: the bottom end of the buffer spring is connected to the second sleeve, the side wall of the second sleeve is installed with an inclined connecting rod, one end of the rod body of the inclined connecting rod is provided with a first connecting rod, the bottom end of the first connecting rod is hinged with a damping transmission roller, the bottom side of the damping transmission roller is provided with an arc-shaped bracket, the bottom end of the arc-shaped bracket is installed with the second connecting rod, the side wall of the second connecting rod is installed with a funnel transmission base, and the bottom end of the funnel transmission base is provided with a covering sleeve.

[0015] As a preferred solution of the present invention: the replacement mechanism includes a transmission disk installed at the bottom end of the funnel transmission base, several U-shaped fitting brackets on the side wall of the transmission disk, a gun head is installed in the middle of the bottom end of the U-shaped fitting bracket, the gun head surrounds a second conical sleeve arranged on the side of the transmission disk, and a conical bracket is provided in the middle of the bottom end of the second conical sleeve.

[0016] As a preferred solution of the present invention: a conical sleeve is provided in the middle of the bottom end of the first conical sleeve, a third sleeve is installed in the middle of the bottom end of the conical sleeve, an annular patch is provided on the outer wall surface of the third sleeve, a conical covering sleeve is installed in the middle of the bottom end of the annular patch, an arc spring is installed in the middle of the bottom end of the conical covering sleeve, and a conical sleeve is installed at the bottom end of the arc spring and the middle of the bottom end of the conical covering sleeve.

[0017] As a preferred solution of the present invention: a traction mechanism is installed in the middle of the top of the conical sleeve, and the traction mechanism includes a fourth sleeve installed at the end position of the conical sleeve, an access sleeve is installed on the top side of the fourth sleeve, a connecting rod is installed on the top of the access sleeve, and an electric telescopic rod is installed on the top of the rod body of the connecting rod.

[0018] As a preferred solution of the present invention: an elastic bracket is installed at the bottom end of the conical sleeve, an expansion and contraction sleeve is installed at the bottom opening of the conical covering sleeve, and the bottom end of the expansion and contraction sleeve is bound to the conical sleeve.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1) Liquid suction is achieved by connecting the dip tube and the conical sleeve at the bottom. The connecting state of the sleeve and the conical covering sleeve limits the binding of the conical sleeve. The conical covering sleeve and the corresponding conical sleeve connecting state achieve the binding and transfer of a specified gun tip. The arc spring achieves the binding of the corresponding conical sleeve when the conical covering sleeve is in the state of upward and downward contraction.

[0021] 2) The side wall bracket and the corresponding buffer spring's elastic traction state coordinate the sleeve's forward and backward lifting. The connecting rod and the inclined connecting rod with damping effect in the middle are used to facilitate coordinated conversion when the gun head needs to be replaced during later testing. The tapered sleeve and the tapered covering at the upper end are used for easy replacement, thereby achieving the purpose of replacing the sampling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a side structural diagram of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the probe and suction mechanism of the utility model;

[0025] Figure 4 This is a schematic diagram of the elastic bracket structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the traction mechanism structure of the utility model;

[0027] Figure 6 This is a schematic diagram of the gun head structure of the present utility model.

[0028] Figure: 1, pipetting mechanism; 11, suction tube; 12, circular opening; 13, piston rod; 14, push piece; 15, arc-shaped gripping hook; 16, timer; 17, elastic suction sleeve; 18, strip block; 19, suction sleeve; 191, end bracket; 192, fastening fitting piece; 193, first sleeve;

[0029] 2. Detection and suction mechanism; 21. First conical sleeve; 22. Side wall bracket; 23. Buffer spring; 24. Second sleeve; 25. Tilt link; 26. First connecting rod; 27. Damping drive roller; 28. Arc bracket; 29. Second connecting rod; 291. Funnel drive base; 292. Covering sleeve;

[0030] 3. Replacement mechanism; 31. Transmission plate; 32. U-shaped fitting bracket; 33. Gun head; 34. Second conical sleeve; 35. Conical bracket; 36. Elastic sleeve; 37. Third sleeve; 38. Annular patch; 39. Conical covering sleeve; 391. Arc spring; 392. Conical sleeve;

[0031] 4. Traction mechanism; 41. Fourth sleeve; 42. Access sleeve; 43. Connecting rod; 44. Electric telescopic rod; 45. Elastic bracket; 46. Expansion and contraction sleeve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1 - Figure 6 The utility model provides a technical solution: a pipette gun for automatically replacing a sampling inspection head, comprising a pipetting mechanism 1, a probe and suction mechanism 2, and a replacement mechanism 3 for automatically replacing the inspection head;

[0034] The pipetting mechanism 1 is used to transfer liquid into the pipette;

[0035] The probe and suction mechanism 2 is used to attract specific liquid substances;

[0036] The replacement mechanism 3 is used as a pressing replacement for the sampling head;

[0037] The pipetting mechanism 1 includes a dip tube 11 for transferring liquid. A circular opening 12 is formed at the top of the dip tube 11. The top of the circular opening 12 is connected to a piston rod 13. A push piece 14 is fitted to the top of the piston rod 13. An arc-shaped gripping hook 15 is installed on the side wall of the dip tube 11.

[0038] A timer 16 is installed in the middle of the side wall of the dipping tube 11 , and an elastic dipping sleeve 17 is installed on the side of the dipping tube 11 .

[0039] In this embodiment: a strip block 18 is installed on the side wall surface of the elastic extraction sleeve 17, a extraction sleeve 19 is installed in the middle of the bottom end of the strip block 18, and an end bracket 191 is installed at both ends of the extraction sleeve 19. The four corners of the end bracket 191 are installed with a fastening fitting piece 192, and the bottom end is installed with a first sleeve 193.

[0040] The adopted end bracket 191 can better realize the downward movement of the bottom suction end.

[0041] In this embodiment: a detection and suction mechanism 2 is installed at the bottom end of the first sleeve 193, and the detection and suction mechanism 2 includes a first conical sleeve 21 installed at the bottom of the first sleeve 193, and a side wall bracket 22 is installed on the side of the first conical sleeve 21, and a buffer spring 23 is provided in the middle of the side wall of the side wall bracket 22.

[0042] The side wall bracket 22 and the buffer spring 23 are used to realize the elastic buffering state to pull the specific position of the first connecting rod 26 up and down.

[0043] In this embodiment: the bottom end of the buffer spring 23 is connected to the second sleeve 24, the side wall of the second sleeve 24 is installed with an inclined link 25, one end of the rod body of the inclined link 25 is provided with a first link 26, the bottom end of the first link 26 is hinged with a damping transmission roller 27, the bottom side of the damping transmission roller 27 is provided with an arc-shaped bracket 28, the bottom end of the arc-shaped bracket 28 is installed with a second link 29, the side wall of the second link 29 is installed with a funnel transmission base 291, and the bottom end of the funnel transmission base 291 is provided with a covering sleeve 292.

[0044] The purpose of the funnel transmission base 291 is to realize the rotation of one end of the funnel transmission base 291, mainly to realize the automatic conversion of the angular position of the transmission disk 31 in a better and more convenient way.

[0045] In this embodiment: the replacement mechanism 3 includes a transmission disk 31 installed at the bottom end of the funnel transmission base 291, several U-shaped fitting brackets 32 on the side wall of the transmission disk 31, a gun head 33 is installed in the middle of the bottom end of the U-shaped fitting bracket 32, the gun head 33 surrounds the second conical sleeve 34 arranged on the side of the transmission disk 31, and a conical bracket 35 is provided in the middle of the bottom end of the second conical sleeve 34.

[0046] The driving disc 31 and the second conical sleeve 34 are adapted to be angle-changed, and the conical bracket 35 is adapted to better achieve the corresponding angle change.

[0047] In this embodiment: an elastic sleeve 36 is provided in the middle of the bottom end of the first conical sleeve 21, and a third sleeve 37 is installed in the middle of the bottom end of the elastic sleeve 36. The outer wall surface of the third sleeve 37 is provided with an annular patch 38, and a conical covering sleeve 39 is installed in the middle of the bottom end of the annular patch 38. An arc spring 391 is installed in the middle of the bottom end of the conical covering sleeve 39, and a conical sleeve 392 is installed at the bottom end of the arc spring 391 and the middle of the bottom end of the conical covering sleeve 39.

[0048] The arc spring 391 and the specific conical sleeve 392 are matched to conveniently surround the four sides of the transmission plate 31 to achieve the binding of the gun head 33.

[0049] In this embodiment: a traction mechanism 4 is installed in the middle of the top of the conical sleeve 392, and the traction mechanism 4 includes a fourth sleeve 41 installed at the end position of the elastic sleeve 36, an access sleeve 42 is installed on the top side of the fourth sleeve 41, a connecting rod 43 is installed on the top of the access sleeve 42, and an electric telescopic rod 44 is installed on the top of the rod body of the connecting rod 43.

[0050] The connecting rod 43 and the electric telescopic rod 44 are used to easily trigger the opening and closing binding tightness below the conical covering sleeve 39 that can be freely opened.

[0051] In this embodiment, an elastic bracket 45 is installed at the bottom end of the conical sleeve 392 , an expansion and contraction sleeve 46 is installed at the bottom opening of the conical covering sleeve 39 , and the bottom end of the expansion and contraction sleeve 46 is bound to the conical sleeve 392 .

[0052] The purpose of the tapered sleeve 392 is to bundle and fix the independent gun heads 33.

[0053] When used specifically, step 1: transfer is achieved according to one end of the push piece 14;

[0054] A person holds the outer wall of the dipping tube 11 and adjusts the position of the push piece 14 (the conical sleeve 392 is intact at this moment), then presses the elastic dipping sleeve 17 to ensure that the end is extended and retracted, and then extends and moves downward. After moving downward, the end close to the conical sleeve 392 is close to the test tube port to transfer the liquid;

[0055] At this moment, the internal space of the conical sleeve 392 completes the suction and enters the position of the first conical sleeve 21 after suction;

[0056] At this time, the user utilizes the sleeve connection scheme of the conical covering sleeve 39, and the adsorption stage is transferred by utilizing the covering state of the conical covering sleeve 39;

[0057] Step 2: Replace the used cone sleeve 392

[0058] At this time, the user covers the conical sleeve 392 according to the sleeve connection scheme of the conical covering sleeve 39. At this time, the user needs to loosen the bound conical sleeve 392. The loosening operation is to use the power of the electric telescopic rod 44 to pull the connecting rod 43 back and forth. According to the position of the cylinder of the access sleeve 42, the elastic force stage of the multiple elastic brackets 45 now realizes elastic buffering. The elastic buffering stage ensures that the sleeve connection means of the multiple conical covering sleeves 39 control the contraction and tensioning direction of the conical covering sleeve 39. Finally, the position of the corresponding conical sleeve 392 is loosened. Then, as long as the user pulls the second connecting rod 29 downward, according to the elastic buffering of the covering sleeve 292;

[0059] Step 3: To assemble the gun head 33, the operator simply twists the covering sleeve 292 to rotate the funnel transmission base 291. This rotates the position of the transmission plate 31, and simultaneously controls the position of the U-shaped fitting bracket 32. Finally, the arc spring 391 is tightened based on its elastic characteristics. After tightening, it is transferred to the position of the conical sleeve 392.

[0060] By rotating one end of the covering sleeve 292, the position of the transmission disc 31 is adjusted to achieve rotation;

[0061] Finally, the transfer is achieved by using one end of the corresponding gun head 33, and finally, the mobile binding is achieved according to one end of the third sleeve 37 facing the sleeve end of the conical covering sleeve 39. After the binding is completed, the dispatch is achieved according to one end of the conical sleeve 392. Finally, the personnel only need to put the gun head 33 back in the same way as pushing a capsule to complete the automatic replacement.

[0062] Then the old one is automatically loosened because of the conical covering sleeve 39 bottom, and finally blanked.

[0063] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A liquid transfer gun for automatically replacing a sampling inspection head, comprising a liquid transfer mechanism (1), a probe and suction mechanism (2), and a replacement mechanism (3) for automatically replacing the inspection head; The pipetting mechanism (1) is used to transfer liquid into a pipette; The probe and suction mechanism (2) is used to attract specific liquid substances; The replacement mechanism (3) acts as a pressing replacement for the sampling head; Its characteristics are: The pipetting mechanism (1) comprises a dip tube (11) for transferring liquid, a circular opening (12) being provided at the top end of the dip tube (11), a piston rod (13) being connected to the top end of the circular opening (12), a push piece (14) being fitted on the top end of the piston rod (13), and an arc-shaped gripping hook (15) being installed on the side wall of the dip tube (11); A timer (16) is installed in the middle of the side wall of the drawing tube (11), and an elastic drawing sleeve (17) is installed on the side of the drawing tube (11).

2. A pipette with an automatic sampling head replacement according to claim 1, characterized in that: A strip block (18) is installed on the side wall surface of the elastic extraction sleeve (17), a extraction sleeve (19) is installed in the middle of the bottom end of the strip block (18), and end brackets (191) are installed at both ends of the extraction sleeve (19), and a first sleeve (193) is installed at the bottom end of the four corners of the end bracket (191).

3. The pipette with automatic sampling head replacement according to claim 2, characterized in that: A probe and suction mechanism (2) is installed at the bottom end of the first sleeve (193), and the probe and suction mechanism (2) includes a first conical sleeve (21) installed at the bottom of the first sleeve (193), a side wall bracket (22) is installed on the side of the first conical sleeve (21), and a buffer spring (23) is provided in the middle of the side wall of the side wall bracket (22).

4. The pipette with automatic sampling head replacement according to claim 3, characterized in that: The bottom end of the buffer spring (23) is connected to a second sleeve (24), a side wall of the second sleeve (24) is installed with an inclined link (25), one end of the rod body of the inclined link (25) is provided with a first link (26), the bottom end of the first link (26) is hinged with a damping transmission roller (27), the bottom side of the damping transmission roller (27) is provided with an arc bracket (28), the bottom end of the arc bracket (28) is installed with a second link (29), the side wall of the second link (29) is installed with a funnel transmission base (291), and the bottom end of the funnel transmission base (291) is provided with a covering sleeve (292).

5. The pipette with automatic sampling head replacement according to claim 1, characterized in that: The replacement mechanism (3) comprises a transmission disc (31) mounted at the bottom end of a funnel transmission base (291), a plurality of U-shaped fitting brackets (32) on the side wall of the transmission disc (31), a gun head (33) mounted at the middle of the bottom end of the U-shaped fitting bracket (32), the gun head (33) surrounding a second conical sleeve (34) arranged on the side of the transmission disc (31), and a conical bracket (35) being provided at the middle of the bottom end of the second conical sleeve (34).

6. The pipette with automatic sampling head replacement according to claim 3, characterized in that: An elastic sleeve (36) is provided at the middle of the bottom end of the first conical sleeve (21), a third sleeve (37) is installed at the middle of the bottom end of the elastic sleeve (36), an annular patch (38) is provided on the outer wall surface of the third sleeve (37), a conical covering sleeve (39) is installed at the middle of the bottom end of the annular patch (38), an arc spring (391) is installed at the middle of the bottom end of the conical covering sleeve (39), and a conical sleeve (392) is installed between the bottom end of the arc spring (391) and the middle of the bottom end of the conical covering sleeve (39).

7. The pipette with automatic sampling head replacement according to claim 6, characterized in that: A traction mechanism (4) is installed at the middle of the top end of the conical sleeve (392), and the traction mechanism (4) includes a fourth sleeve (41) installed at the end position of the elastic sleeve (36), an access sleeve (42) is installed on the top side of the fourth sleeve (41), a connecting rod (43) is installed at the top end of the access sleeve (42), and an electric telescopic rod (44) is installed at the top end of the connecting rod (43).

8. The pipette with automatic sampling head replacement according to claim 6, characterized in that: An elastic bracket (45) is installed at the bottom end of the conical sleeve (392), and an expansion and contraction sleeve (46) is installed at the bottom opening position of the conical covering sleeve (39). The bottom end of the expansion and contraction sleeve (46) is bound to the conical sleeve (392).

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