Pipette with conversion structure

Abstract

The utility model discloses a pipette with a conversion structure, which comprises a mounting block, a fixing hole and storage holes are arranged on the mounting block, a driving hole is arranged on one side of each storage hole, the driving holes are communicated with the storage holes through connecting grooves, a sliding groove is further arranged on the side wall of the mounting block, the sliding groove is communicated with the driving holes, and the driving holes are communicated with the sliding groove. A driving groove combination is arranged on the inner wall of the driving hole, a driving rod and a tension spring are further arranged in the driving hole, one end of the tension spring is connected with the driving hole, and the other end of the tension spring is connected with the driving rod. The switching device is additionally arranged on the sleeve of the pipette, the push rod is pressed to push the driving rod to move, the position of the pipette head is adjusted through cooperation of the guide column, the first guide groove and the spiral groove, and the pipette head and the sleeve can be firmly fixed together through the tension spring and the second guide groove. The pipette tip can be recycled through the non-return strip and the reset groove, direct contact between the hand of an operator and the abandoned pipette tip is avoided, then the pipetting efficiency is improved, and pollution to the experimental environment is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical instruments, and particularly relates to a pipette with a conversion structure. Background Art

[0002] A pipette (liquid transfer pipette) is a metering tool that transfers liquid from an original container to another container within a certain range of measuring ranges. Its basic structure mainly includes a display window, a capacity adjustment component, a piston, an O-ring, a suction tube, and a tip (liquid suction nozzle), etc. The tips (liquid suction nozzles) of common pipettes on the market currently are such that when replacing the tip of the current pipette, the operator needs to manually pull out the tip, and the attachments on the discarded tip are likely to contaminate the gloves worn by the operator, requiring the operator to frequently change gloves, thereby reducing the liquid transfer efficiency and easily contaminating the experimental environment.

[0003] Therefore, it is necessary for us to design a pipette with a conversion structure to solve these problems. Content of the Utility Model

[0004] The problem to be solved by the utility model is to provide a pipette with a conversion structure, which can quickly replace the tip of the pipette without directly contacting the tip of the pipette.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A pipette with a conversion structure includes a mounting block, on which a fixing hole and a storage hole are provided. On one side of each storage hole, a driving hole is provided, and the driving hole is communicated with the storage hole through a connecting groove. A sliding groove is also provided on the side wall of the mounting block, and the sliding groove is communicated with the driving hole. A driving groove combination is provided on the inner wall of the driving hole, and a driving rod and a tension spring are also provided in the driving hole. One end of the tension spring is connected to the driving hole, and the other end is connected to the driving rod. An installation hole is also provided on the driving rod, a spring and a guiding column are provided in the installation hole, one end of the guiding column extends out of the installation hole and then inserts into the driving groove, and a push rod and a claw are also provided on the driving rod.

[0007] Preferably, the driving groove combination includes a first guiding groove, a spiral groove, a second guiding groove, and a reset groove. The two ends of the spiral groove and the reset groove are respectively communicated with the first guiding groove and the second guiding groove. A non-return strip is provided in the second guiding groove, and the non-return strip is located between the reset groove and the spiral groove.

[0008] With such a setting, the directional movement, rotation, and fixation of the tip can be achieved through the cooperation of the driving groove combination and the guiding column.

[0009] Preferably, one end of the push rod is rotatably connected to the drive rod, and the other end extends out of the chute.

[0010] With such a setting, it is convenient to push the drive rod to move through the push rod, so as to achieve contactless replacement of the gun head.

[0011] Preferably, the claw is located in the receiving hole, and the claw is connected to the drive rod through a connecting rod, and the connecting rod is located in the connecting groove.

[0012] With such a setting, the gun head can be fixed by the claw, and the connection and linkage between the drive rod and the claw can be realized through the connecting rod.

[0013] Preferably, an anti-slip sleeve is attached to the inner wall of the fixing hole, a limiting ring is further provided on the side wall of the fixing hole, and the anti-slip sleeve is made of rubber.

[0014] With such a setting, the installation body can be ensured to be installed in place through the limiting ring, and the friction between the sleeve and the fixing hole can be increased through the anti-slip sleeve, so as to improve the firmness of the installation of the installation block.

[0015] The advantages and positive effects of the present utility model are:

[0016] By installing a switching device on the sleeve of the pipette, the present utility model pushes the drive rod to move by pressing the push rod, adjusts the position of the gun head through the cooperation of the guide post with the first guide groove and the spiral groove, enables the gun head to be firmly fixed to the sleeve by using the tension spring and the second guide groove, and realizes the recycling of the gun head through the anti-reverse strip and the reset groove, avoiding the direct contact between the operator's hand and the discarded gun head, thereby improving the pipetting efficiency and avoiding polluting the experimental environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 is a schematic diagram of the installation position of the switching device on the pipette;

[0019] Figure 2 is a partial cross-sectional schematic diagram of the internal structure of the switching device;

[0020] Figure 3 is a schematic diagram of the position structure of the installation hole and the drive column on the drive rod;

[0021] Figure 4 It is a schematic structural diagram of the driving groove combination;

[0022] Figure 5 is Figure 1 an enlarged view of the structure at position A in

[0023] Figure 6 a schematic structural diagram of the anti-slip sleeve and the limit ring in the fixing hole on the mounting block.

[0024] The description of the reference numerals is as follows:

[0025] 1. Pipette; 2. Sleeve; 3. Switching device; 301. Mounting block; 302. Receiving hole; 303. Claw; 304. Link; 305. Connecting groove; 306. Driving hole; 307. First guiding groove; 308. Spiral groove; 309. Second guiding groove; 310. Reset groove; 311. Driving rod; 312. Fixing hole; 313. Push rod; 314. Mounting hole; 315. Tension spring; 316. Guide post; 317. Spring; 318. Chute; 319. Anti-reverse strip; 320. Limit ring; 321. Anti-slip sleeve. Specific embodiments

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0028] The following further describes the present utility model in conjunction with the accompanying drawings:

[0029] Embodiment 1: As Figures 1-6 shown, a pipette with a conversion structure includes a mounting block 301. The mounting block 301 is provided with a fixing hole 312 and a receiving hole 302. A driving hole 306 is provided on one side of each receiving hole 302. The driving hole 306 communicates with the receiving hole 302 through a connecting groove 305. A sliding groove 318 is further provided on the side wall of the mounting block 301. The sliding groove 318 communicates with the driving hole 306. A driving groove combination is provided on the inner wall of the driving hole 306. A driving rod 311 and a tension spring 315 are further provided in the driving hole 306. One end of the tension spring 315 is connected to the driving hole 306, and the other end is connected to the driving rod 311. An installation hole 314 is further provided on the driving rod 311. A spring 317 and a guiding column 316 are provided in the installation hole 314. One end of the guiding column 316 extends out of the installation hole 314 and then inserts into the driving groove. A push rod 313 and a claw 303 are further provided on the driving rod 311.

[0030] As Figure 4 shown, the driving groove combination includes a first guiding groove 307, a spiral groove 308, a second guiding groove 309, and a reset groove 310. The two ends of the spiral groove 308 and the reset groove 310 are respectively communicated with the first guiding groove 307 and the second guiding groove 309. A non-return strip 319 is provided in the second guiding groove 309, and the non-return strip 319 is located between the reset groove 310 and the spiral groove 308. Such a setting can realize the directional movement, rotation, and fixation of the pipette tip through the cooperation of the driving groove combination and the guiding column 316.

[0031] As Figure 2 shown, one end of the push rod 313 is rotatably connected to the driving rod 311, and the other end extends out of the sliding groove 318. Such a setting facilitates the movement of the driving rod 311 by pushing the push rod 313, realizing non-contact replacement of the pipette tip.

[0032] As Figure 5 shown, the claw 303 is located in the receiving hole 302, and the claw 303 is connected to the driving rod 311 through a connecting rod 304. The connecting rod 304 is located in the connecting groove 305. Such a setting can fix the pipette tip through the claw 303, and the connecting rod 304 can realize the connection and linkage between the driving rod 311 and the claw 303.

[0033] As Figure 6 shown, an anti-slip sleeve 321 is fitted on the inner wall of the fixing hole 312. A limiting ring 320 is further provided on the side wall of the fixing hole 312. The material of the anti-slip sleeve 321 is rubber. Such a setting can ensure the installation in place of the installation body through the limiting ring 320, and the anti-slip sleeve 321 can increase the friction between the sleeve 2 and the fixing hole 312, improving the firmness of the installation of the mounting block 301.

[0034] Working process of this embodiment: Before use, first push out the claw 303 from the storage hole 302 through the push rod 313, then install nozzles of different specifications on different claws 303, retract the nozzle into the storage hole 302 through the claw 303, and then pass the sleeve 2 of the pipette 1 through the fixing hole 312 on the mounting hole 314. Utilize the friction force between the rubber anti-slip sleeve 321 and the sleeve 2 to fix the switching device 3 on the sleeve 2 of the pipette 1. It should be noted that the sleeve 2 does not need to be inserted until it fits with the limit ring 320, so as to ensure that the switching device 3 is in place safely.

[0035] During use, the operator installs the corresponding nozzle on the pipette 1 according to the usage requirements. When installing the nozzle, push the push rod 313 connected to the corresponding storage hole 302. When the push rod 313 is pushed and slides along the chute 318, it will drive the drive rod 311 to move outwards from the drive hole 306. When the drive rod 311 moves, it will stretch the tension spring 315. When the drive rod 311 moves along the drive hole 306, the guide post 316 on the drive rod 311 will first slide along the first guide groove 307. When the guide post 316 moves to the connection between the first guide groove 307 and the spiral groove 308, the nozzle in the storage hole 302 will also be completely withdrawn from the storage hole 302 by the claw 303. When the guide post 316 enters the spiral groove 308, it will drive the drive rod 311 to rotate. After the drive rod 311 rotates, it will drive the nozzle to rotate through the claw 303. When the guide post 316 moves along the spiral groove 308 to the connection between the spiral groove 308 and the second guide groove 309, the nozzle will move to the end of the sleeve 2, and then release the push rod 313. At this time, the tension spring 315 will pull the drive rod 311 to move into the drive hole 306, and the guide post 316 will move along the second guide groove 309. The guide post 316 will move into the mounting hole 314, compressing the spring 317. When the guide post 316 passes over the anti-backlash strip 319, the spring 317 will push the guide post 316 to extend out of the mounting hole 314 and contact the second guide groove 309 again.

[0036] When the guide post 316 moves along the second guide groove 309, the nozzle will approach the sleeve 2, realizing the connection between the nozzle and the sleeve 2. At this time, the operator uses the pipette 1 to perform liquid transfer.

[0037] When the gun head needs to be replaced, the operator first presses down the push rod 313 on the gun head that has been connected to the sleeve 2. At this time, the guide post 316 will move downward along the second chute 318. When the guide post 316 moves into contact with the anti-reverse strip 319, it will slide into the reset groove 310 under the guidance of the anti-reverse strip 319. At this time, after the operator releases the push rod 313, the tension spring 315 will start to shorten, pulling the drive rod 311 to move into the drive hole 306. During this process, the guide post 316 will move from the reset groove 310 to the first guide groove 307. When the guide post 316 moves along the reset groove 310 to the connection between the reset groove 310 and the first guide groove 307, the gun head will move to below the receiving hole 302 under the drive of the claw 303. When the guide post 316 enters the first guide groove 307 and slides upward, the gun head will be received into the receiving hole 302. Then the operator selects the required gun head and realizes the connection between the gun head and the sleeve 2 through the push rod 313.

[0038] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equal changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A liquid transfer gun with a conversion structure, characterized in that: The invention comprises a mounting block (301), wherein the mounting block (301) is provided with a fixing hole (312) and a receiving hole (302), wherein a driving hole (306) is provided on one side of each receiving hole (302), wherein the driving hole (306) is connected to the receiving hole (302) via a connecting groove (305), wherein a sliding groove (318) is further provided on a side wall of the mounting block (301), wherein the sliding groove (318) is connected to the driving hole (306), wherein a driving groove combination is provided on an inner wall of the driving hole (306), and wherein the driving hole (306) is further provided with a connecting groove (318) in the inner wall of the driving hole (306). A driving rod (311) and a tension spring (315) are provided, one end of the tension spring (315) is connected to the driving hole (306), and the other end is connected to the driving rod (311), the driving rod (311) is also provided with a mounting hole (314), a spring (317) and a guide column (316) are provided in the mounting hole (314), one end of the guide column (316) extends out from the mounting hole (314) and is inserted into the driving groove, and the driving rod (311) is also provided with a push rod (313) and a claw (303).

2. A liquid transfer gun with a conversion structure according to claim 1, characterized in that: The driving groove combination comprises a first guide groove (307), a spiral groove (308), a second guide groove (309) and a reset groove (310); the two ends of the spiral groove (308) and the reset groove (310) are respectively connected to the first guide groove (307) and the second guide groove (309); a check bar (319) is arranged in the second guide groove (309), and the check bar (319) is located between the reset groove (310) and the spiral groove (308).

3. A liquid transfer gun with a conversion structure according to claim 1, characterized in that: One end of the push rod (313) is rotatably connected to the driving rod (311), and the other end extends out of the sliding groove (318).

4. The liquid transfer gun with a conversion structure according to claim 1, characterized in that: The clamping claw (303) is located in the receiving hole (302), and the clamping claw (303) is connected to the driving rod (311) via a connecting rod (304), and the connecting rod (304) is located in the connecting groove (305).

5. The liquid transfer gun with a conversion structure according to claim 1, characterized in that: An anti-slip sleeve (321) is fitted on the inner wall of the fixing hole (312), and a limiting ring (320) is also provided on the side wall of the fixing hole (312). The material of the anti-slip sleeve (321) is rubber.

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