Single-channel pipette and use method thereof

Abstract

The invention discloses a single-channel pipette and a using method thereof, and particularly relates to the technical field of single-channel pipettes, the single-channel pipette comprises an upper gun body and a lower gun body arranged at the bottom of the upper gun body, a protective connecting assembly is arranged between the upper gun body and the lower gun body, and the protective connecting assembly comprises a center cylinder arranged in the upper gun body, a piston cylinder located on the outer side of the center cylinder is arranged at the bottom of the center cylinder. Through corresponding cooperative use of all the structures, when the second limiting teeth and the first limiting teeth slide, meshing sounds with equal tooth intervals can be made, an operator is reminded that the upper gun body and the lower gun body are in a tightened state, the limiting buckles are clamped in the buckle cavities, in-place sounds are made, the operator is reminded that tightening is in place, and the safety of the operator is guaranteed. Therefore, an operator is prevented from excessively screwing the thread sleeve, the hidden danger that the lower gun body falls off due to screwing explosion of the thread sleeve is prevented, and dangerous accidents caused by liquid leakage are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of single-channel liquid transfer guns, and more specifically, to a single-channel liquid transfer gun and a method for using the same. Background Art

[0002] A pipette is a tool used to precisely move and transfer liquids in a laboratory. It usually consists of a long, thin tube with a pipette connected to one end and a nozzle that releases the liquid at the other end. The pipette can draw and release a predetermined amount of liquid by operating the piston of the pipette. They are often used in laboratory work such as biochemistry, molecular biology, and pharmacy to prepare solutions, handle samples, and mix reactions. The capacity of a pipette can vary from microliters to several milliliters according to needs, and pipettes are divided into single-channel pipettes and multi-channel pipettes according to the number of nozzles for taking liquids.

[0003] For single-channel pipette products, the upper half of the gun body is fixed to the lower half of the gun head through a connection method. Currently, most of the products on the market use a snap-on or threaded connection method. Although the snap-on connection can achieve a simple connection and fixation effect, due to the presence of a certain amount of vacancy in the snap, the lower half of the gun head connected will be somewhat loose, which will not only affect the accuracy of the pipette; at the same time, since the snap is relatively weak and the snap clamping margin is not large, it is easy to cause the lower half of the gun head to fall off during use, which will not only waste precious experimental samples, but also cause serious harm to the operator. Although the threaded connection method can achieve a fixing effect, most of them do not have an anti-loosening device, resulting in the loosening and falling of the thread during use, which will not only easily affect the accuracy of the pipette, but also cause serious harm to the operator; in addition, during the tightening of the thread, there is no early warning measure, resulting in the risk of exploding the pipette head or the upper half of the gun body during tightening, which is also easy to cause safety hazards and dangerous accidents. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a single-channel pipette and a method of using the same, aiming to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a single-channel pipette gun, comprising an upper gun body and a lower gun body arranged at the bottom of the upper gun body, wherein a protective connection assembly is arranged between the upper gun body and the lower gun body; The protective connection assembly comprises a central tube arranged in the upper gun body, a piston tube located outside the central tube is arranged at the bottom of the central tube, a ring buckle is arranged at the bottom end of the central tube, and a plurality of first limiting teeth for limiting are distributed at the bottom of the ring buckle and along the circumference of the axis point of the ring buckle; A limiting seat for limiting position is arranged in the piston cylinder, deformation cavities are penetrated on both sides of the surface of the limiting seat, buckle cavities for limiting position are arranged on both sides of the bottom of the inner wall of the piston cylinder, and each of the buckle cavities extends to the surface of the piston cylinder, limiting buckles for limiting position are arranged on both sides of the bottom of the limiting seat, the limiting buckles match the buckle cavities, and each of the limiting buckles extends into the corresponding buckle cavities and is snapped with the buckle cavities, a second limiting tooth meshing with the first limiting tooth is arranged on the top of the limiting buckle, and a threaded sleeve for threaded locking is arranged on the inner wall of the piston cylinder and the outer side of the center cylinder; It can be seen that in the above technical solution, the first limiting tooth on the end face of the annular buckle collides with the second limiting tooth on the limiting buckle. Since the rubber pad has elastic space for longitudinal movement when the limiting seat is compressed, the second limiting tooth and the first limiting tooth will make an engagement sound of equal tooth spacing when they slide, prompting the operator that the upper gun body and the lower gun body will reach a tightening state, and the limiting buckle is stuck in the buckle cavity and makes a sound of being in place, prompting the operator that the tightening has been in place, and due to the limiting buckle and the buckle cavity, the center tube cannot continue to be twisted, thereby preventing the operator from twisting the thread sleeve too hard, preventing the hidden danger of the lower gun body falling off caused by the twisting of the thread sleeve, and avoiding dangerous accidents caused by liquid leakage. A rubber pad is arranged at the bottom and inside of the limit seat, a spring located in the piston cylinder is arranged at the bottom of the rubber pad, a limit pressure block is arranged at the bottom and outside of the spring, the limit pressure block is located at the bottom of the inner wall of the piston cylinder, a sealing ring is arranged at the bottom of the limit pressure block, a piston rod is arranged inside the spring, the bottom of the piston rod penetrates the spring and extends into the lower gun body, a push sleeve is arranged at the top of the lower gun body and located on the outside of the piston cylinder, the top of the push sleeve extends into the upper gun body and is detachably connected to the upper gun body, a hand push sleeve is arranged at the top of the upper gun body, a vertical cross-section of one side of the hand push sleeve is arranged in an arc shape, and a delivery pipe connected to the center cylinder is arranged at the top of the hand push sleeve; It can be seen that in the above technical solution, the rubber pad can make the second limit tooth and the first limit tooth in a stable meshing force during vibration, so that during vibration, the first limit tooth and the second limit tooth will not be loosened, and the limit seat will not be separated from the piston cylinder. Therefore, the problem of the lower gun body loosening caused by long-term use or vibration is effectively solved, which can not only solve the problem of unstable accuracy caused by loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by loosening and falling of the thread, thus avoiding the occurrence of dangerous accidents. A method of use, using the above-mentioned single-channel pipette, the method comprises the following steps: Step 1: During installation, the upper gun body and the lower gun body are screwed together through the thread sleeve on the outer side of the center tube and the thread sleeve on the inner wall of the piston tube. When tightened to a certain depth, the first limit tooth on the end face of the ring buckle collides with the second limit tooth on the limit buckle. Since the rubber pad has elastic space for longitudinal movement when the limit seat is compressed, the second limit tooth and the first limit tooth will make an engagement sound with equal tooth spacing when sliding, prompting the operator that the upper gun body and the lower gun body will reach a tightened state. Step 2: When the screw is tightened to the bottom, the limit buckle will be stuck in the buckle cavity and make a sound, prompting the operator that the screw has been tightened to the right position. The center tube cannot be screwed further due to the limit buckle and the buckle cavity, thereby preventing the operator from screwing the screw sleeve too hard and causing the lower gun body to fall off, and avoiding dangerous accidents caused by liquid leakage. Step three, the limit seat is installed on the piston cylinder through the limit buckle and the buckle cavity, so that the limit seat cannot rotate, but there is a small virtual position under the buckle cavity, which can move longitudinally to a certain displacement, and the limit buckle can have a certain elasticity through the deformation cavity. Under the action of the threaded torque, the limit seat is installed on the piston cylinder through the buckle cavity and the limit buckle, and the limit seat is pressed on the rubber pad, so that the limit seat has elastic space for longitudinal movement; Step four, during vibration, the rubber pad can keep the second limit tooth and the first limit tooth in a stable meshing force, so that during vibration, the first limit tooth and the second limit tooth will not be loosened, nor will the limit seat be separated from the piston cylinder. Therefore, the problem of the lower gun body loosening due to long-term use or vibration is effectively solved. It can not only solve the problem of unstable accuracy caused by loose pipette, but also effectively solve the problem of liquid spilling caused by loose thread and falling off, thus avoiding the occurrence of dangerous accidents.

[0006] Technical effects and advantages of the present invention: The present invention screws the upper gun body and the lower gun body together through the thread sleeve on the outer side of the center tube and the thread sleeve on the inner wall of the piston tube. When the thread sleeve is screwed into a certain depth, the first limiting tooth on the end surface of the ring buckle collides with the second limiting tooth on the limiting buckle, so that the upper gun body and the lower gun body can be easily connected together. When the limit seat is compressed, the rubber pad has elastic space for longitudinal movement, so when the second limit tooth and the first limit tooth slide, a meshing sound with equal tooth spacing is emitted, prompting the operator that the upper gun body and the lower gun body will reach a tightening state; The present invention prevents the operator from screwing the thread sleeve excessively and causing it to burst, thereby preventing the lower gun body from falling off due to the screw sleeve bursting and avoiding dangerous accidents caused by liquid leakage. The limit seat of the present invention is installed on the piston cylinder through the limit buckle and the buckle cavity, so that the limit seat cannot rotate, but can move longitudinally to a certain displacement, and the limit buckle can pass through the deformation cavity to have a certain elasticity. Under the action of the torque of the matching thread, the limit seat is installed on the piston cylinder through the buckle cavity and the limit buckle, and the limit seat is pressed on the rubber pad, so that the limit seat has elastic space for longitudinal movement; When the present invention vibrates, the rubber pad can make the second limiting tooth and the first limiting tooth be in a stable meshing force, so that when vibrating, the first limiting tooth and the second limiting tooth will not be loosened, and the limiting seat will not be separated from the piston cylinder. Therefore, the problem of the lower gun body being loosened due to long-term use or vibration is effectively solved. When the operator disassembles, the operator not only needs to overcome the meshing force of the second limiting tooth and the first limiting tooth, but also needs to overcome the clamping force of the limiting buckle and the deformation cavity to disassemble. This can not only solve the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by the loosening and falling of the thread, thereby avoiding the occurrence of dangerous accidents. To sum up, through the corresponding coordinated use of various structures, the first limiting tooth on the end face of the annular buckle collides with the second limiting tooth on the limiting buckle, so that the upper gun body and the lower gun body can be easily connected together. When the limiting seat is compressed, the rubber pad has elastic space for longitudinal movement, so when the second limiting tooth and the first limiting tooth slide, a meshing sound of equal tooth spacing will be emitted, prompting the operator that the upper gun body and the lower gun body will reach a tightening state. The limiting buckle is stuck in the buckle cavity and emits a sound of being in place, prompting the operator that the tightening has been in place, so that the center tube cannot continue to be twisted, thereby avoiding operation. The screw sleeve may burst due to excessive twisting, thereby preventing the hidden danger of the lower gun body falling off caused by the screw sleeve bursting, and avoiding dangerous accidents caused by liquid leakage. The rubber pad can make the second limit tooth and the first limit tooth in a stable meshing force, so that during vibration, the first limit tooth and the second limit tooth will not be loosened, and the limit seat will not be separated from the piston cylinder. Therefore, the problem of the lower gun body loosening caused by long-term use or vibration can be effectively solved. It can not only solve the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by loosening and falling of the thread, thus avoiding the occurrence of dangerous accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0008] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0009] Figure 2 This is a cross-sectional view of the center tube of the present invention installed in the upper gun body.

[0010] Figure 3 It is a cross-sectional view of the limit seat, rubber pad and spring of the present invention.

[0011] Figure 4 For the present invention Figure 3 Exploded diagram.

[0012] Figure 5 It is a front view of the center tube, the annular buckle, the first limiting tooth and the upper gun body of the present invention.

[0013] Figure 6 It is a front view of the push sleeve, the second limiting tooth, the limiting seat and the center tube of the present invention.

[0014] Figure 7 It is a front view of the piston cylinder, the limiting seat, the limiting buckle and the second limiting tooth of the present invention.

[0015] Figure 8 It is a front view of each structure on the central tube and the limiting seat of the present invention.

[0016] The reference numerals are: 1, upper gun body; 101, lower gun body; 102, hand push sleeve; 103, delivery pipe; 2. Center tube; 201. Piston tube; 202. Ring buckle; 203. First limit tooth; 204. Limit seat; 205. Deformation cavity; 206. Buckle cavity; 207. Limit buckle; 208. Second limit tooth; 209. Wire sleeve; 3. Rubber pad; 301. Spring; 302. Limiting block; 303. Sealing ring; 304. Piston rod; 305. Push sleeve. DETAILED DESCRIPTION

[0017] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0018] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] As attached Figure 1-8 The single-channel pipette and its use method shown in the figure, through the protective connection component set between the upper gun body 1 and the central tube 2, the first limiting tooth 203 on the end face of the annular buckle 202 collides with the second limiting tooth 208 on the limiting buckle 207, so that the upper gun body 1 and the lower gun body 101 can be easily connected together. When the limiting seat 204 is compressed, the rubber pad 3 has elastic space for longitudinal movement, so when the second limiting tooth 208 and the first limiting tooth 203 slide, a meshing sound with equal tooth spacing is emitted, prompting the operator that the upper gun body 1 and the lower gun body 101 will reach a tightening state, and the limiting buckle 207 is stuck in the buckle cavity 206 and emits a sound of being in place, prompting the operator that the tightening has been in place, so that the central tube 2 cannot be further twisted. , thereby preventing the operator from twisting the thread sleeve 209 too hard, preventing the thread sleeve 209 from twisting and bursting and causing the lower gun body 101 to fall off, and avoiding dangerous accidents caused by liquid leakage. The rubber pad 3 can make the second limiting tooth 208 and the first limiting tooth 203 in a stable meshing force, so that during vibration, the first limiting tooth 203 and the second limiting tooth 208 will not be loosened, and the limiting seat 204 will not be separated from the piston cylinder 201. Therefore, the problem of the lower gun body 101 loosening caused by long-term use or vibration is effectively solved, which can not only solve the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by the loosening of the thread, avoiding the occurrence of dangerous accidents, and the specific structural arrangement of the assembly is as follows; The protective connection assembly includes a central tube 2 disposed in the upper gun body 1, a piston tube 201 located outside the central tube 2 is disposed at the bottom of the central tube 2, a ring buckle 202 is disposed at the bottom end of the central tube 2, and a plurality of first limiting teeth 203 for limiting are distributed at the bottom of the ring buckle 202 and along the circumference of the axis point of the ring buckle 202; A limiting seat 204 for limiting is provided in the piston cylinder 201, and deformation cavities 205 are provided on both sides of the surface of the limiting seat 204, and buckle cavities 206 for limiting are provided on both sides of the bottom of the inner wall of the piston cylinder 201, and each buckle cavity 206 extends to the surface of the piston cylinder 201, and limiting buckles 207 for limiting are provided on both sides of the bottom of the limiting seat 204, and the limiting buckles 207 match the buckle cavities 206, and each limiting buckle 207 extends into the corresponding buckle cavity 206 and is snapped with the buckle cavity 206, and the top of the limiting buckle 207 is provided with a second limiting tooth 208 meshing with the first limiting tooth 203, and the inner wall of the piston cylinder 201 and the outer side of the center cylinder 2 are provided with a threaded locking thread sleeve 209; A rubber pad 3 is arranged at the bottom of the limiting seat 204 and located in 21, a spring 301 located in the piston cylinder 201 is arranged at the bottom of the rubber pad 3, a limiting pressure block 302 is arranged at the bottom of the rubber pad 3 and located on the outside of the spring 301, the limiting pressure block 302 is located at the bottom of the inner wall of the piston cylinder 201, a sealing ring 303 is arranged at the bottom of the limiting pressure block 302, a piston rod 304 is arranged inside the spring 301, the bottom of the piston rod 304 penetrates the spring 301 and extends into the lower gun body 101, a push sleeve 305 is arranged at the top of the lower gun body 101 and located on the outside of the piston cylinder 201, the top of the push sleeve 305 extends into the upper gun body 1 and is detachably connected to the upper gun body 1, a hand push sleeve 102 is arranged at the top of the upper gun body 1, a vertical cross-section of one side of the hand push sleeve 102 is arranged in an arc shape, and a delivery pipe 103 connected to the center tube 2 is arranged at the top of the hand push sleeve 102; A method of use, using the above-mentioned single-channel pipette, the method comprises the following steps: Step 1: During installation, the upper gun body 1 and the lower gun body 101 are screwed together through the thread sleeve 209 on the outer side of the center tube 2 and the thread sleeve 209 on the inner wall of the piston tube 201. When tightened to a certain depth, the first limiting tooth 203 on the end face of the ring buckle 202 collides with the second limiting tooth 208 on the limiting buckle 207. Since the rubber pad 3 has elastic space for longitudinal movement when the limiting seat 204 is compressed, the second limiting tooth 208 and the first limiting tooth 203 will make a meshing sound with equal tooth spacing when sliding, prompting the operator that the upper gun body 1 and the lower gun body 101 will reach a tightened state; Step 2: When the screw is tightened to the bottom, the limit buckle 207 is stuck in the buckle cavity 206 and makes a sound of tightening, prompting the operator that the screw has been tightened to the right position. In addition, due to the limit buckle 207 and the buckle cavity 206, the center tube 2 cannot be screwed further, thereby preventing the operator from screwing the thread sleeve 209 too hard, preventing the thread sleeve 209 from screwing and causing the lower gun body 101 to fall off, and avoiding dangerous accidents caused by liquid leakage. Step three, the limit seat 204 is installed on the piston cylinder 201 through the limit buckle 207 and the buckle cavity 206, so that the limit seat 204 cannot rotate, but there is a small virtual position under the buckle cavity 206, which can move longitudinally to a certain displacement, and the limit buckle 207 can pass through the deformation cavity 205 with a certain elasticity. Under the action of the threaded torque, the limit seat 204 is installed on the piston cylinder 201 through the buckle cavity 206 and the limit buckle 207, and the limit seat 204 is pressed on the rubber pad 3, so that the limit seat 204 has an elastic space for longitudinal movement; Step four, during vibration, the rubber pad 3 can make the second limit tooth 208 and the first limit tooth 203 in a stable meshing force, so that during vibration, the first limit tooth 203 and the second limit tooth 208 will not be loosened, and the limit seat 204 will not be separated from the piston cylinder 201. Therefore, the problem of the lower gun body 101 loosening due to long-term use or vibration is effectively solved. It can not only solve the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by loose threads and avoiding the occurrence of dangerous accidents.

[0021] According to the above structure, when in use, the upper gun body 1 and the lower gun body 101 are screwed together through the thread sleeve 209 on the outer side of the center tube 2 and the thread sleeve 209 on the inner wall of the piston tube 201. When tightened to a certain depth, the first limiting tooth 203 on the end face of the ring buckle 202 collides with the second limiting tooth 208 on the limiting buckle 207. Since the rubber pad 3 has elastic space for longitudinal movement when the limiting seat 204 is compressed, the second limiting tooth 208 and the first limiting tooth 203 will make a meshing sound with equal tooth spacing when sliding, prompting the operator that the upper gun body 1 and the lower gun body 101 will reach a tightened state; When the screw is tightened to the bottom, the limit buckle 207 will be stuck in the buckle cavity 206 and make a sound of tightening, prompting the operator that the screw has been tightened to the right position. In addition, due to the limit buckle 207 and the buckle cavity 206, the center tube 2 cannot be screwed further, thereby preventing the operator from screwing the thread sleeve 209 too hard and bursting it, preventing the hidden danger of the lower gun body 101 falling off due to the screw sleeve 209 being screwed and bursting, and avoiding dangerous accidents caused by liquid leakage. The limit seat 204 is installed on the piston cylinder 201 through the limit buckle 207 and the buckle cavity 206, so that the limit seat 204 cannot rotate, but there is a small virtual space under the buckle cavity 206, which can move longitudinally to a certain displacement, and the limit buckle 207 can pass through the deformation cavity 205 with a certain elasticity. Under the action of the threaded torque, the limit seat 204 is installed on the piston cylinder 201 through the buckle cavity 206 and the limit buckle 207, and the limit seat 204 is pressed on the rubber pad 3, so that the limit seat 204 has elastic space for longitudinal movement; During vibration, the rubber pad 3 can keep the second limiting tooth 208 and the first limiting tooth 203 in a stable meshing force, so that during vibration, the first limiting tooth 203 and the second limiting tooth 208 will not be loosened, and the limiting seat 204 will not be separated from the piston cylinder 201. Therefore, the problem of the lower gun body 101 loosening due to long-term use or vibration is effectively solved. It can not only solve the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solve the problem of liquid spilling caused by loose threads, thereby avoiding the occurrence of dangerous accidents.

[0022] Different from the prior art, the present application discloses a single-channel pipette and a method for using the same. The first limiting tooth 203 on the end face of the annular buckle 202 collides with the second limiting tooth 208 on the limiting buckle 207, so that the upper gun body 1 and the lower gun body 101 can be easily connected together. When the limiting seat 204 is compressed, the rubber pad 3 has elastic space for longitudinal movement, so when the second limiting tooth 208 and the first limiting tooth 203 slide, a meshing sound with equal tooth spacing is emitted, prompting the operator that the upper gun body 1 and the lower gun body 101 will reach a tightening state. The limiting buckle 207 is stuck in the buckle cavity 206 and emits a sound of being in place, prompting the operator that the tightening has been in place, so that the center tube 2 cannot continue to be tightened. The screw thread sleeve 209 is twisted to prevent the operator from twisting the screw thread sleeve 209 too hard, thereby preventing the screw thread sleeve 209 from twisting and causing the lower gun body 101 to fall off, and avoiding dangerous accidents caused by liquid leakage. The rubber pad 3 can make the second limit tooth 208 and the first limit tooth 203 be in a stable meshing force, so that during vibration, the first limit tooth 203 and the second limit tooth 208 will not be loosened, and the limit seat 204 will not be separated from the piston cylinder 201. Therefore, the problem of the lower gun body 101 loosening due to long-term use or vibration is effectively solved, which not only solves the problem of unstable accuracy caused by the loosening of the pipette gun, but also effectively solves the problem of liquid spilling caused by the loosening and falling of the thread, thereby avoiding the occurrence of dangerous accidents.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A single-channel pipette, comprising an upper pipette body (1) and a lower pipette body (101) arranged at the bottom of the upper pipette body (1), characterized in that: A protective connection assembly is provided between the upper gun body (1) and the lower gun body (101); The protective connection assembly comprises a central tube (2) arranged in the upper gun body (1); a piston tube (201) located outside the central tube (2) is arranged at the bottom of the central tube (2); a ring buckle (202) is arranged at the bottom end of the central tube (2); a plurality of first limiting teeth (203) for limiting are distributed at the bottom of the ring buckle (202) and along the circumference of the axis point of the ring buckle (202); A limiting seat (204) for limiting position is arranged in the piston cylinder (201), and deformation cavities (205) are provided through both sides of the surface of the limiting seat (204).

2. The single-channel pipette according to claim 1, characterized in that: Buckle cavities (206) for limiting position are provided on both sides of the bottom of the inner wall of the piston cylinder (201), and each of the buckle cavities (206) extends to the surface of the piston cylinder (201).

3. The single-channel pipette according to claim 2, characterized in that: Both sides of the bottom of the limiting seat (204) are provided with limiting buckles (207) for limiting, the limiting buckles (207) match the buckle cavity (206), and each limiting buckle (207) extends into the corresponding buckle cavity (206) and is engaged with the buckle cavity (206), and the top of the limiting buckle (207) is provided with a second limiting tooth (208) meshing with the first limiting tooth (203).

4. The single-channel pipette according to claim 1, characterized in that: The inner wall of the piston cylinder (201) and the outer side of the center cylinder (2) are both provided with threadedly locked thread sleeves (209).

5. The single-channel pipette according to claim 1, characterized in that: A rubber pad (3) is provided at the bottom of the limiting seat (204) and is located inside (21), and a spring (301) located inside the piston cylinder (201) is provided at the bottom of the rubber pad (3).

6. The single-channel pipette according to claim 5, characterized in that: A limiting pressure block (302) is provided at the bottom of the rubber pad (3) and outside the spring (301). The limiting pressure block (302) is located at the bottom of the inner wall of the piston cylinder (201). A sealing ring (303) is provided at the bottom of the limiting pressure block (302).

7. The single-channel pipette according to claim 5, characterized in that: A piston rod (304) is disposed inside the spring (301), and the bottom of the piston rod (304) passes through the spring (301) and extends into the lower gun body (101).

8. The single-channel pipette according to claim 1, characterized in that: A push sleeve (305) is provided at the top of the lower gun body (101) and located outside the piston cylinder (201), and the top of the push sleeve (305) extends into the upper gun body (1) and is detachably connected to the upper gun body (1), wherein the push sleeve (305) is used to remove the suction head.

9. The single-channel pipette according to claim 1, characterized in that: A push sleeve (102) is arranged on the top of the upper gun body (1), a vertical cross-section of one side of the push sleeve (102) is arranged in an arc shape, and a delivery pipe (103) connected to the central tube (2) is arranged on the top of the push sleeve (102).

10. A method of use, using the single-channel pipette according to any one of claims 1 to 9, characterized in that: The method comprises the following steps, Step 1, when the upper gun body (1) and the lower gun body (101) are screwed together through the thread sleeve (209) on the outer side of the center tube (2) and the thread sleeve (209) on the inner wall of the piston tube (201), the first limiting tooth (203) on the end surface of the ring buckle (202) collides with the second limiting tooth (208) on the limiting buckle (207), making an evenly spaced kneading sound, and engaging and pre-tightening; Step 2: The limit seat (204) is installed on the piston cylinder (201) through the limit buckle (207) and the buckle cavity (206), so that the limit seat (204) cannot rotate. Under the action of the torque of the matching thread, the limit seat (204) is installed on the piston cylinder (201) through the buckle cavity (206) and the limit buckle (207); Step three, when vibrating, the rubber pad (3) can make the second limit tooth (208) and the first limit tooth (203) be in a stable meshing force, so that when vibrating, the first limit tooth (203) and the second limit tooth (208) will not be loosened, and the limit seat (204) will not be separated from the piston cylinder (201), so that the upper gun body (1) and the lower gun body (101) are connected tightly and will not be loosened when vibrating.

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