CN213467842U - Pipette with positioning and locking structure - Google Patents

Abstract

The utility model relates to the technical field of machinery. The pipette with the positioning and locking structure comprises a pipette body, wherein the pipette body comprises a cylinder body, a piston and a handle, the cylinder body comprises a liquid suction and discharge part for the reciprocating motion of the piston, and the lower end of the liquid suction and discharge part is detachably connected with a liquid suction and discharge nozzle; the liquid sucking and releasing part is provided with scale marks; the cylinder body also comprises a limiting part for limiting the movement of the piston, the limiting part is positioned above the liquid absorbing and releasing part, and the inner diameter of the limiting part is smaller than that of the liquid absorbing and releasing part; the limiting part is provided with at least three limiting bulges from top to bottom; one end of the handle is connected with the piston, and the other end of the handle extends out of the cylinder body; and the handle is provided with a limiting block matched with the limiting protrusion. The handle is convenient to move to the positioning position, and then mechanical limit is carried out, and universal mechanical locking at several measuring ranges is convenient to realize. Facilitating rapid and accurate pipetting.

Description

Pipette with positioning and locking structure

Technical Field

The utility model relates to the technical field of machinery, specifically a pipette.

Background

An ear washing ball is an existing pipetting mechanism. However, when the traditional aurilave absorbs liquid, the aurilave is operated by force of one hand, so that the aurilave is not well controlled by a beginner, and once too much or too little, liquid needs to be absorbed again, which consumes time and labor.

The existing pipettes are often visually observed through scale marks. The device is not provided with a mechanical limiting mechanism, so that the limiting at a fixed distance is realized.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a pipette with location locking structure to solve above at least one technical problem.

In order to achieve the above object, the utility model provides a pipette with positioning and locking structure, including the pipette body, the pipette body includes barrel, piston and handle, its characterized in that, the barrel includes the liquid absorbing and releasing part that is used for piston reciprocating motion, the lower extreme of liquid absorbing and releasing part can be dismantled and be connected with and inhale and release the liquid mouth, be equipped with the scale mark on the liquid absorbing and releasing part;

the cylinder body also comprises a limiting part for limiting the movement of the piston, the limiting part is positioned above the liquid absorbing and releasing part, and the inner diameter of the limiting part is smaller than that of the liquid absorbing and releasing part;

the limiting part is provided with at least three limiting bulges from top to bottom;

one end of the handle is connected with the piston, and the other end of the handle extends out of the cylinder body;

and the handle is provided with a limiting block matched with the limiting protrusion.

This patent is through the configuration optimization of pipette, is convenient for realize that the handle activity moves to the location and moves the back, carries out machinery spacingly, is convenient for realize the mechanical locking of several general ranges department. Facilitating rapid and accurate pipetting.

Further preferably, the projections of the at least three limiting protrusions in the axial direction are arranged at equal intervals;

the limiting block is an annular limiting block, notches are circumferentially distributed on the annular limiting block, and the number of the notches is one less than that of the limiting protrusions;

the projection of one limiting protrusion in all the limiting protrusions is not positioned in the projection area of the notch on the annular limiting block, and the other limiting protrusions are respectively positioned in the projection area of the notch on the annular limiting block.

For example, liquid needs to be sucked to the second limiting protrusion, the handle is rotated in the circumferential direction, the projection of the notch of the annular limiting stopper does not correspond to the projection of the second limiting protrusion, and the rest limiting protrusions correspond to each other. And then when the handle is pulled, the mechanical limit is carried out at the second limit protrusion.

Preferably, the upper end of the limiting part is provided with a protrusion matched with the vertical projection surface of the limiting protrusion;

the top of the handle is provided with a positioning plate, and the positioning plate is provided with a positioning hole which is vertically projected and superposed with the notch.

Facilitating reference to circumferential rotation of the handle.

Preferably, at least three limiting protrusions are arranged at equal intervals from bottom to top, and the interval angle between adjacent limiting protrusions is 30-90 degrees;

the limiting block is an annular limiting block, and a notch matched with the limiting protrusion is formed in the annular limiting block.

The handle is convenient to mechanically limit after reaching the limit protrusion at the set position needing to be extracted in the axial pulling and circumferential rotating processes.

Further preferably, the upper end of the limiting part is provided with angle scale marks which are circumferentially arranged.

The reference basis for realizing circumferential rotation of the handle is convenient.

Preferably, the top of the liquid absorbing and releasing part is detachably connected with a sealing rubber plug and an air absorbing balloon, and an air outlet of the air absorbing balloon is communicated with an inner cavity of the liquid absorbing and releasing part;

the handle is sleeved with a plastic sleeve, a sealing element is fixed on the inner wall of the plastic sleeve, and the sealing element is sleeved on the periphery of the limiting part.

This patent is through sealed rubber buffer, sealing member and inhale the setting of balloon, and then realize the sealed back chamber in constitution upper end is separated to the barrel, can give the back chamber tonifying qi through inhaling the balloon, and then drives the piston and move down, and then realize the micro-control of outage. When the handle is needed to be manually operated to discharge liquid, the sealing rubber plug is pulled out.

Further preferably, the liquid sucking and discharging part is provided with a fixing mechanism for fixing the washing balloon.

Further preferably, the sealing rubber plug is mounted on a switch mechanism;

the switch mechanism comprises a pressing plate hinged with the outer side of the liquid absorbing and releasing part, and a spring abutting against the liquid absorbing and releasing part is connected below the left side of the pressing plate;

the right side below of clamp plate is connected with sealed rubber buffer.

When being convenient for through the left side of pushing down the clamp plate, sealing rubber stopper shifts up, and the back chamber switches on with the atmosphere. When the pressing plate is released, the sealing rubber plug is pressed against by the action force of the spring.

Drawings

Fig. 1 is a cross-sectional view of embodiment 1 of the present invention;

fig. 2 is a cross-sectional view of a stopper according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a limiting block according to embodiment 1 of the present invention;

fig. 4 is another schematic structural diagram of a limiting block according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a local structure of embodiment 1 of the present invention in a state where a limiting block and a limiting portion of the structure shown in fig. 5 are engaged with each other;

fig. 6 is a cross-sectional view of embodiment 2 of the present invention;

fig. 7 is a partially enlarged view of a portion a in fig. 6 according to the present invention.

Wherein: the device comprises a barrel 1, a piston 2, a handle 3, a sealing rubber plug 4, a sealing element 5, a sucking balloon 6, a spring 7, a pressing plate 8, a liquid sucking and releasing part 11, a limiting part 12, a limiting protrusion 13, a limiting block 21 and a notch 22.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Specific embodiment 1, referring to fig. 1 to 5, a pipette with a positioning and locking structure includes a pipette body, the pipette body includes a cylinder 1, a piston 2 and a handle 3, the cylinder 1 includes a liquid absorbing and releasing part 11 for the piston 2 to reciprocate, and the lower end of the liquid absorbing and releasing part 11 is detachably connected with a liquid absorbing and releasing nozzle; the liquid absorbing and releasing part 11 is provided with scale marks; the cylinder 1 also comprises a limiting part 12 for limiting the movement of the piston 2, the limiting part 12 is positioned above the liquid absorbing and releasing part 11, and the inner diameter of the limiting part 12 is smaller than that of the liquid absorbing and releasing part 11; the limiting part 12 is provided with at least three limiting protrusions 13 from top to bottom; one end of the handle 3 is connected with the piston 2, and the other end of the handle 3 extends out of the cylinder 1; the handle 3 is provided with a limiting block 21 matched with the limiting protrusion 13. This patent is through the configuration optimization of pipette, is convenient for realize that the handle activity moves to the location and moves the back, carries out machinery spacingly, is convenient for realize the mechanical locking of several general ranges department. Facilitating rapid and accurate pipetting. The longitudinal arrangement distance of the limiting protrusions is matched with the measuring range distance of the scale marks. For example, when Aml liquid needs to be sucked and the piston moves to the A scale of the scale mark, the limit part is abutted against one limit protrusion. Thereby realizing the mechanical limit of the liquid absorption amount. The limiting protrusions can be provided with three limiting protrusions which are respectively used for quantitative suction of three volumes of 5ml, 10ml and 15 ml. And is of course not limited to such a setting. Fig. 2 shows a case where 5 stopper projections are present. The positions of the 5 limiting protrusions can be set according to requirements. The liquid sucking device meets the sucking of liquid with different volumes. The liquid suction and discharge nozzle can be changed into different structures according to different requirements. And the butt joint with other devices is convenient. The handle includes the montant and the horizontal pole of vertical setting, and the montant can be dismantled with the horizontal pole and be connected, and the piston is connected to the montant.

Aiming at the matching of the limiting protrusion 13 and the limiting block:

referring to fig. 2 and 3, at least three limiting protrusions 13 may be arranged at equal intervals from bottom to top, and the interval angle between adjacent limiting protrusions 13 is 30 ° to 90 °; the limiting block 21 is an annular limiting block, and a notch 22 matched with the limiting protrusion 13 is formed in the annular limiting block. The handle 3 is convenient for mechanical limiting after reaching the limiting protrusion 13 at the set position to be extracted in the axial pulling and circumferential rotating processes. The upper end of the limiting part 12 is provided with angle scale marks which are circumferentially arranged. The reference basis for realizing the circumferential rotation of the handle 3 is convenient.

Alternatively, referring to fig. 2, 4 and 5, the projections of the at least three limiting protrusions 13 in the axial direction are arranged at equal intervals; the limiting block 21 is an annular limiting block, notches 22 are circumferentially arranged on the annular limiting block, and the number of the notches 22 is one less than that of the limiting protrusions 13; the projection of one of the limiting protrusions 13 is not in the projection area of the notch on the annular limiting block, and the other limiting protrusions are respectively in the projection area of the notch on the annular limiting block. For example, liquid needs to be sucked to the second limiting protrusion, the handle is rotated in the circumferential direction, the projection of the notch of the annular limiting stopper does not correspond to the projection of the second limiting protrusion, and the rest limiting protrusions correspond to each other. And then when the handle is pulled, the mechanical limit is carried out at the second limit protrusion. The upper end of the limiting part 12 is provided with a protrusion matched with the vertical projection surface of the limiting protrusion 13; the top of the handle 3 is provided with a positioning plate, and the positioning plate is provided with a positioning hole which is vertically projected and superposed with the notch. Facilitating reference to the circumferential rotation of the handle 3. That is to say that locating plate and stopper can the structure unanimity. The notch is positioned on the vertical projection plane of the handle.

Referring to fig. 6 and 7, in embodiment 2, based on embodiment 1, a sealing rubber plug 4 and a suction ball 6 are detachably connected to the top of the liquid suction and discharge portion, and an air outlet of the suction ball 6 is communicated with an inner cavity of the liquid suction and discharge portion; the handle is sleeved with a plastic sleeve, a sealing element 5 is fixed on the inner wall of the plastic sleeve, and the sealing element 5 is sleeved on the periphery of the limiting part. This patent is through sealed rubber buffer, sealing member and inhale the setting of balloon, and then realizes that the barrel separates and constitutes the sealed back chamber in upper end, can give the back chamber tonifying qi through inhaling the balloon, and then drives the piston and move down, and then realizes the micro-control of outage. When the handle is needed to be manually operated to discharge liquid, the sealing rubber plug is pulled out. The liquid absorbing and releasing part is provided with a fixing mechanism for fixing the washing balloon. A first one-way valve is arranged between the air suction balloon and the liquid suction and release part, and a second one-way valve for air supplement is arranged on the air suction balloon. The second one-way valve is communicated with the atmosphere. The second one-way valve is used for supplying air to the air suction ball from atmosphere. The flow guiding directions of the first one-way valve and the second one-way valve are opposite. The first one-way valve is used for the suction balloon to supplement air to the back cavity. The sealing rubber plug is arranged on a switch mechanism; the switch mechanism comprises a pressing plate 8 hinged with the outer side of the liquid absorbing and releasing part, and a spring 7 which is propped against the liquid absorbing and releasing part is connected below the left side of the pressing plate 8; a sealing rubber plug is connected to the lower part of the right side of the pressing plate 8. When being convenient for through the left side of pushing down the clamp plate, sealing rubber stopper shifts up, and the back chamber switches on with the atmosphere. When the pressing plate is released, the sealing rubber plug is pressed against by the action force of the spring. The seal may be a rubber ring or a rubber sleeve. The center of the pressure plate is hinged with the liquid sucking and releasing part. The liquid sucking and placing part is provided with an air outlet, and the sealing rubber plug is used for plugging the air outlet. The air outlet is opened or closed by the movement of the pressure plate. The liquid absorbing and releasing part is rotatably connected with a pressure lever which takes the vertical direction as the rotating central line. The rotating track of the pressure rod is connected with the pressure plate. The pressure lever is used as a force application part for pressing the pressure plate. The exhaust port and the atmosphere conduction state can be conveniently realized. When the pressure bar is above the pressure plate, the spring is in a compressed state, the sealing rubber plug is above the air outlet, and the air outlet is not blocked.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The pipette with the positioning and locking structure comprises a pipette body, wherein the pipette body comprises a cylinder, a piston and a handle, and is characterized in that the cylinder comprises a liquid sucking and releasing part for the reciprocating motion of the piston, the lower end of the liquid sucking and releasing part is detachably connected with a liquid sucking and releasing nozzle, and the liquid sucking and releasing part is provided with scale marks;

the cylinder body also comprises a limiting part for limiting the movement of the piston, the limiting part is positioned above the liquid absorbing and releasing part, and the inner diameter of the limiting part is smaller than that of the liquid absorbing and releasing part;

the limiting part is provided with at least three limiting bulges from top to bottom;

one end of the handle is connected with the piston, and the other end of the handle extends out of the cylinder body;

and the handle is provided with a limiting block matched with the limiting protrusion.

2. The pipette with positive detent of claim 1 wherein: the axial projections of the at least three limiting protrusions are arranged at equal intervals;

the limiting block is an annular limiting block, notches are circumferentially distributed on the annular limiting block, and the number of the notches is one less than that of the limiting protrusions;

the projection of one limiting protrusion in all the limiting protrusions is not positioned in the projection area of the notch on the annular limiting block, and the other limiting protrusions are respectively positioned in the projection area of the notch on the annular limiting block.

3. The pipette with positive detent of claim 2 wherein: the upper end of the limiting part is provided with a protrusion matched with the vertical projection surface of the limiting protrusion;

the top of the handle is provided with a positioning plate, and the positioning plate is provided with a positioning hole which is vertically projected and superposed with the notch.

4. The pipette with positive detent of claim 1 wherein: at least three limiting protrusions are arranged at equal intervals from bottom to top, and the interval angle between every two adjacent limiting protrusions is 30-90 degrees;

the limiting block is an annular limiting block, and a notch matched with the limiting protrusion is formed in the annular limiting block.

5. The pipette with positive detent of claim 4 wherein: the upper end of the limiting part is provided with angle scale marks which are circumferentially arranged.

6. The pipette with positive detent of claim 1 wherein: the top of the liquid absorbing and releasing part is detachably connected with a sealing rubber plug and an air absorbing balloon, and an air outlet of the air absorbing balloon is communicated with an inner cavity of the liquid absorbing and releasing part;

the handle is sleeved with a plastic sleeve, a sealing element is fixed on the inner wall of the plastic sleeve, and the sealing element is sleeved on the periphery of the limiting part.

7. The pipette with positive detent of claim 6 wherein: the liquid absorbing and releasing part is provided with a fixing mechanism for fixing the washing balloon.

8. The pipette with positive detent of claim 6 wherein: the sealing rubber plug is arranged on a switch mechanism;

the switch mechanism comprises a pressing plate hinged with the outer side of the liquid absorbing and releasing part, and a spring abutting against the liquid absorbing and releasing part is connected below the left side of the pressing plate;

the right side below of clamp plate is connected with sealed rubber buffer.

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