CN217989356U - Hand-held pressurizing device of liquid-transfering gun - Google Patents

Abstract

The utility model belongs to the technical field of biological test equipment, in particular to a liquid-transfering gun holds pressure device, the utility model discloses liquid-transfering gun holds pressure device utilizes rack and pinion mechanism control and the lifter of piston rod fixed connection to move from top to bottom to realize the action of liquid-transfering gun absorption liquid, in addition through the rotatory so as to realize the action of gripping handle control gear, thereby realize utilizing the mode of holding to replace the thumb to press the mode and carry out the control that liquid-transfering gun absorbs liquid, solved the long-time thumb fatigue problem that repeatedly presses the piston rod and lead to, facilitate the use; the device has simple structure, can be suitable for the straight barrel type liquid-transfering gun of thumb pressing of different types, has strong applicability, and is easy to popularize and apply.

Description

Hand-held pressurizing device of liquid-transfering gun

Technical Field

The utility model belongs to the technical field of biological test equipment, especially, relate to a liquid-transfering gun holds pressure device.

Background

The pipette is also called a micropipette, and is one of the necessary tools for tissue fluid proportioning in biological tests. However, the existing pipette is basically of a straight cylinder type, and when a sample is taken, a piston rod of the pipette needs to be repeatedly pressed by a thumb to suck the sample, and particularly when a large number of samples need to be taken, the thumb is easy to fatigue.

Chinese patent document CN207786628U (CN 201721926099.3) discloses a medical examination pipetting gun, which includes a housing in an inverted L shape, a hand-held part is provided at an end of one side of the housing, a suction and discharge device for sucking or discharging liquid is provided in the housing, a centralized air chamber is provided below one end of the suction and discharge device, a control device for controlling the suction and discharge device to suck or discharge liquid is provided at the other end of the suction and discharge device, a refuting port is provided at the bottom of the centralized air chamber, the refuting port extends to the outside of the housing, and a liquid sucking head is provided on the refuting port; the liquid-transfering gun for medical examination has the advantages of reasonable structure and capability of reducing hand fatigue of medical workers.

But above-mentioned medical science inspection pipetting gun needs redesign to pipetting gun overall structure, can't solve the tired problem of thumb that current straight-tube pipetting gun thumb pressed the piston rod for a long time and leads to reform transform with high costs, it is poor to popularize and apply the nature.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure device is held to liquid-transfering gun, utilize this liquid-transfering gun to hold pressure device and can utilize the thumb to press the action of absorbing liquid to be transformed into to utilize the mode of holding to go on with current liquid-transfering gun, effectively solved the tired problem of thumb that the long-time piston rod of pressing down leads to this device is applicable to the straight cylinder liquid-transfering gun of the thumb push type of different grade type.

The utility model discloses the technical problem that will solve adopts following technical scheme to realize: a hand-held pressurizing device of a liquid-transferring gun is used for the liquid-transferring gun, the liquid-transferring gun comprises a piston cylinder and a piston rod, the piston rod can move up and down and is arranged in the piston cylinder, the hand-held pressurizing device of the liquid-transferring gun comprises a bracket, a lifting rod and a gear rack mechanism, the bracket is used for being fixedly connected with the piston cylinder, the lifting rod is used for being fixedly connected with the piston rod, the gear rack mechanism is used for controlling the lifting rod to move up and down, and the lifting rod can be arranged on the bracket in a vertical sliding mode;

the gear rack mechanism comprises a gear rotatably arranged on the support, a rack fixedly arranged on the lifting rod and a handle used for controlling the rotation of the gear, and the gear and the rack are meshed with each other.

The utility model has the advantages that: the liquid-transferring gun holding and pressurizing device of the utility model utilizes the gear rack mechanism to control the lifting rod fixedly connected with the piston rod to move up and down so as to realize the action of liquid-transferring gun to absorb liquid, and in addition, the gear is controlled to rotate by the gripping handle so as to realize the action, thereby realizing the control of liquid-transferring gun to absorb liquid by using the holding mode to replace the thumb pressing mode, solving the problem of thumb fatigue caused by repeatedly pressing the piston rod for a long time, and being convenient for use;

the device is simple in structure, can be suitable for the straight barrel type liquid-transfering guns of different types in thumb pressing mode, is high in applicability, and is easy to popularize and apply.

The technical scheme of the utility model also: the handle is fixedly arranged on the gear. The rotation of the gear can be realized by pulling the handle with a finger, so that the piston rod is driven to descend to discharge gas in the piston cylinder, after the handle is loosened, the piston rod drives the lifting rod to ascend under the action of the return spring of the liquid transfer gun, so that liquid is sucked, and the liquid can be discharged from the piston cylinder by pulling the handle again.

The technical proposal of the utility model is also that: the handle is connected with the gear through a one-way bearing, and the handle is detachably arranged on the one-way bearing;

the circulating lifting mechanism comprises ratchets arranged on the lifting rod, limiting blocks matched with the ratchets and limiting pins detachably inserted on the bracket, the limiting blocks are hinged on the bracket, and torsion springs are arranged between the limiting blocks and the bracket;

when the ratchet is not contacted with the limiting block, the limiting block is in a horizontal state;

when the ratchet and the limiting block are clamped together, the limiting block is located above the ratchet, and the limiting pin is located above the limiting block. By arranging the one-way bearing, the gear can be repeatedly applied with force along the same direction by utilizing the handle, so that the descending distance of the piston rod is prolonged; the limiting pin can prevent the limiting block from rotating upwards, and the limiting block matched with the ratchet can limit the lifting rod to move upwards when the handle does not apply force to the gear; when liquid is sucked, the handle is taken down from the one-way bearing, the limiting pin is moved away from the upper part of the limiting block, the resistance of the torsion spring can be overcome under the action of a return spring of the liquid-transferring gun, the limiting block is enabled to rotate upwards, and the lifting rod moves upwards under the action of the return spring of the liquid-transferring gun, so that the liquid is sucked; when the handle is pulled, the ratchet can press the limiting block to overcome the resistance of the torsion spring to move downwards so as to discharge liquid from the piston cylinder, and the circulating lifting mechanism is mainly used for the condition that the suction range of the pipette is large and the rotation angle of the handle control gear is small.

The technical proposal of the utility model is also that: the handle is provided with a groove matched with the fingers. The grooves matched with the fingers are formed in the handle, so that the fingers can be conveniently gripped and applied with force.

The technical proposal of the utility model is also that: still include centre gripping fixed establishment, centre gripping fixed establishment includes punch holder, lower plate, centre gripping bolt and fixing bolt, the equal gliding cover of punch holder, lower plate is established on the lifter, punch holder and lower plate pass through centre gripping bolt interconnect, punch holder or lower plate pass through fixing bolt and are connected with the lifter. Through with fixing bolt with punch holder and lifter fixed connection, then utilize punch holder, lower plate to grasp the piston rod, through screwing up clamping bolt, can be with piston rod and lifter fixed connection to be applicable to the piston rod of different grade type.

Drawings

FIG. 1 is a reference diagram illustrating a state of use of a hand-held pressurizing device of a pipette;

fig. 2 is a schematic structural view of the hand-held pressurizing device of the pipette of the present invention;

FIG. 3 is a perspective view of the hand-held pressurizing device of the pipette of the present invention;

FIG. 4 is an enlarged view of a portion of the pipette gun of FIG. 3 holding the pressurizing device G according to the present invention;

in the figure, 1 is a piston cylinder, 2 is a piston rod, and 21 is a piston handle;

3, a bracket, 4 lifting rods, 5 gears, 6 racks, 7 handles and 71 grooves;

8 one-way bearings, 9 ratchets, 10 limiting blocks, 11 limiting pins, 12 torsion springs, 13 upper clamping plates, 14 lower clamping plates, 15 clamping bolts, 16 fixing bolts and 17 return springs.

Detailed Description

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example 1

As shown in fig. 1 and 2, a hand-held pressurizing device for a pipette is used for the pipette, the pipette comprises a piston cylinder 1 and a piston rod 2, the piston rod 2 can be vertically moved and arranged in the piston cylinder 1, the pipette is further provided with a return spring 17 for controlling the piston rod 2 to move upwards, and after the force application to the piston rod 2 is cancelled, the piston rod 2 moves upwards under the action of the return spring 17 to suck liquid. The hand-held pressurizing device of the pipette comprises a support 3 fixedly connected with a piston cylinder 1, a lifting rod 4 fixedly connected with a piston rod 2 and a gear rack mechanism used for controlling the lifting rod 4 to move up and down, wherein the lifting rod 4 is arranged on the support 3 in a vertically sliding mode, the support 3 is fixed with the piston cylinder 1 through a hoop or a clamp, and a specific connecting part structure is not shown in the drawing.

The gear rack mechanism comprises a gear 5 which is rotatably arranged on the bracket 3, a rack 6 which is fixedly arranged on the lifting rod 4 and a handle 7 which is used for controlling the gear 5 to rotate. The handle 7 is fixedly arranged on the gear 5, and the gear 5 is meshed with the rack 6.

The handle 7 is provided with a groove 71 adapted to fingers. In order to reduce the weight, all parts of the liquid-transferring gun hand-holding pressurizing device except spring parts are made of plastic materials.

Piston rod 2 passes through centre gripping fixed establishment and lifter 4 fixed connection, as shown in fig. 1, is provided with piston handle 21 above the piston rod 2, centre gripping fixed establishment includes punch holder 13, lower plate 14, clamping bolt 15 and fixing bolt 16, the equal gliding cover of punch holder 13, lower plate 14 is established on lifter 4 from top to bottom, punch holder 13 and lower plate 14 pass through clamping bolt 15 interconnect, set up piston handle 21 between punch holder 13 and lower plate 14, can be in the same place piston handle 21, punch holder 13 and lower plate 14 are fixed through clamping bolt 15, punch holder 13 passes through fixing bolt 16 and is connected with lifter 4.

Example 2

The difference from the embodiment 1 is that the liquid-transferring gun hand-holding pressurizing device further comprises a circulating lifting mechanism, the handle 7 is connected with the gear 5 through a one-way bearing 8, and the handle 7 is detachably arranged on the one-way bearing 8.

As shown in fig. 3 and 4, the circulating lifting mechanism includes a ratchet 9 disposed on the lifting rod 4, a limiting block 10 matched with the ratchet 9, and a limiting pin 11 detachably inserted on the bracket 3, the limiting block 10 is hinged on the bracket 3, a torsion spring 12 is disposed between the limiting block 10 and the bracket 3, one end of the torsion spring 12 is fixedly connected with the bracket 3, and the other end is fixedly connected with the limiting block 10. The elastic force of the torsion spring 12 is smaller than that of the return spring 17.

When the ratchet 9 is not contacted with the limiting block 10, the limiting block 10 is in a horizontal state.

When the ratchet 9 and the limiting block 10 are clamped together, the limiting block 10 is located above the ratchet 9, and the limiting pin 11 is located above the limiting block 10.

The support 3 is provided with a through hole matched with the limit pin 11, and the limit pin 11 is inserted into the through hole.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (5)

1. The utility model provides a pressure device is held to liquid-transfering gun hand for the liquid-transfering gun, the liquid-transfering gun includes piston cylinder (1) and piston rod (2), but piston rod (2) up-and-down motion establish in piston cylinder (1), its characterized in that: the hand-held pressurizing device of the pipette comprises a support (3) fixedly connected with a piston cylinder (1), a lifting rod (4) fixedly connected with a piston rod (2) and a gear rack mechanism for controlling the lifting rod (4) to move up and down, wherein the lifting rod (4) is arranged on the support (3) in a vertically sliding manner;

the gear rack mechanism comprises a gear (5) which is rotatably arranged on the support (3), a rack (6) which is fixedly arranged on the lifting rod (4) and a handle (7) which is used for controlling the gear (5) to rotate, and the gear (5) and the rack (6) are mutually meshed.

2. The hand-held pressurizing device for pipette tips of claim 1, further comprising: the handle (7) is fixedly arranged on the gear (5).

3. The hand-held pressurizing device for pipette of claim 1, wherein: the lifting device is characterized by further comprising a circulating lifting mechanism, the handle (7) is connected with the gear (5) through a one-way bearing (8), and the handle (7) is detachably arranged on the one-way bearing (8);

the circulating lifting mechanism comprises ratchets (9) arranged on the lifting rod (4), limiting blocks (10) matched with the ratchets (9) and limiting pins (11) detachably inserted on the support (3), the limiting blocks (10) are hinged on the support (3), and torsion springs (12) are arranged between the limiting blocks (10) and the support (3);

when the ratchet (9) is not contacted with the limiting block (10), the limiting block (10) is in a horizontal state;

when the ratchet (9) and the limiting block (10) are clamped together, the limiting block (10) is positioned above the ratchet (9), and the limiting pin (11) is positioned above the limiting block (10).

4. The hand-held pressurizing device for pipette tips of claim 1, further comprising: the handle (7) is provided with a groove (71) which is adapted to fingers.

5. The hand-held pressurizing device for pipette tips of claim 1, further comprising: still include centre gripping fixed establishment, centre gripping fixed establishment includes punch holder (13), lower plate (14), clamping bolt (15) and fixing bolt (16), gliding cover is established on lifter (4) from top to bottom all can in punch holder (13), lower plate (14), punch holder (13) and lower plate (14) are through clamping bolt (15) interconnect, punch holder (13) or lower plate (14) are connected with lifter (4) through fixing bolt (16).

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