Liquid taking device with one-way pressing function

Abstract

The application provides a liquid storage bottle type one-way pressing and quantitative liquid taking device, which comprises a bottle body, a composite bottle cap, an inner slide rod assembly and a linkage assembly. A quantitative cavity is formed between the inner bottom plate and the outer bottom plate of the composite bottle cap. The inner end of the inner bottom plate is fixedly connected with an inner guide pipe, and the outer end of the outer bottom plate is fixedly connected with an outer guide pipe. A gas return pipe is fixed to the inner bottom plate. The quantitative cavity is provided with a gas supply pipe and is installed with a gas supply one-way valve. The inner slide rod of the inner slide rod assembly is fixedly connected with an inner sleeve pipe and an outer sleeve pipe at both ends, and is sleeved in the inner guide pipe and the outer guide pipe respectively. Only one side hole is located in the quantitative cavity at all times. The linkage assembly is used for driving the inner slide rod to slide axially outward or inward. The application realizes one-hand operation, and the batch quantitative liquid taking purpose can be achieved by sequentially and alternately pressing. The operation is simple, the speed of discharging the liquid medicine can be improved, the quantitative liquid medicine can be fully discharged, the problem of incomplete discharge of the liquid medicine is avoided, and the problem of deviation of the liquid supplementing quantity when the liquid is supplemented into the quantitative cavity next time by inverting is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid taking tools for pharmaceutical experiments, and particularly relates to a one-way pressing quantitative liquid taking device with a liquid storage bottle. BACKGROUND

[0002] In biological and chemical experiments, it is often necessary to take or quantitatively take biological and microbial culture solution and reagents. At present, a pipette is commonly used to perform these operations. The existing pipette can quantitatively take liquid, but needs to repeatedly take liquid and transfer and discharge, which is troublesome to operate. For the same sample, there is no existing technology with a liquid storage bottle for quantitative liquid taking. Moreover, the existing liquid taking instruments are mostly contact type liquid taking, and the pipette head frequently contacts between air and the original container during the taking, transferring and discharging processes, which increases the chance of contamination of the test solution.

[0003] The prior art CN203727856 discloses a bottle cap for liquid quantitative extrusion, which can meet the function of quantitative liquid taking, but has the defects of complex structure and high cost. The utility model CN 215286164 U discloses a disinfectant quantitative liquid taking device, which belongs to the technical field of liquid taking devices and includes a bottle body, a bottle cap and a syringe. The syringe includes a barrel, a capacity scale, a liquid suction connector, a piston, a push rod and a pressing plate. The bottom of the barrel is fixedly connected with the bottle cap. The liquid suction connector is fixedly connected with the bottle cap and connected with a suction pipe through a first one-way valve. This scheme is troublesome to operate and cannot realize one-handed quick batch quantitative operation.

[0004] The existing similar pipettes generally do not have a pressurizing and discharging function, which may cause residual liquid to be unable to be fully discharged, thereby affecting the liquid taking and discharging accuracy. SUMMARY

[0005] In view of the problem that the prior art lacks a one-handed operation and quick batch quantitative liquid taking tool, the present application provides a one-way pressing quantitative liquid taking device with a liquid storage bottle, which can realize one-handed quick liquid taking and quantitative discharge through pressing, complete discharge without residual liquid, ensure the liquid taking accuracy and be suitable for batch quantitative liquid taking applications.

[0006] The technical problem is solved by the following solution: a liquid storage bottle type one-way pressing liquid quantitative taking device, comprising a bottle body, a composite bottle cap, an inner slide rod assembly and a linkage assembly, the bottle mouth thread of the bottle body is sealingly and fixedly connected with the bottle cap thread of the composite bottle cap, the composite bottle cap comprises a cylindrical tube body, an inner bottom plate and an outer bottom plate, the inner end of the inner bottom plate is fixedly connected with an inner guide pipe, the outer end of the outer bottom plate is fixedly connected with an outer guide pipe, a quantitative cavity is formed between the inner bottom plate and the outer bottom plate, a gas return pipe is fixed to the inner bottom plate, the lower end of the gas return pipe is located in the quantitative cavity, the upper part is located near the flat bottom of the bottle body, the quantitative cavity is provided with a gas supply pipe and is installed with a gas supply one-way valve, the inner slide rod assembly comprises an inner slide rod, the two ends of the inner slide rod are fixedly connected with an inner sleeve and an outer sleeve respectively, and an inner pipe side hole and an outer pipe side hole are arranged on the side of the inner sleeve and the outer sleeve respectively, the inner sleeve and the outer sleeve are sleeved in the inner guide pipe and the outer guide pipe respectively, the distance between the inner end of the inner sleeve and the inner end of the outer sleeve is a, the distance between the two side holes is b, b>a is satisfied, so that only one side hole is located in the quantitative cavity at all times, and the linkage assembly is used for driving the inner slide rod to slide axially outward or inward.

[0007] The linkage assembly comprises an outer sleeve fixed to the outer wall of the composite bottle cap, one side of the outer sleeve is fixed with a guide pipe through a connecting seat, the guide pipe is sleeved with a linkage rod, the upper end of the linkage rod is installed with a button after being led out from the guide pipe, a return spring is connected between the lower side of the button and the guide pipe, and the lower end of the linkage rod is fixedly connected with the outer sleeve pipe through a fixing sleeve.

[0008] A through hole is arranged on one side of the outer bottom plate, the lower end of the linkage rod is led into the quantitative cavity from the through hole after being bent, and is fixed with the inner slide rod through the fixing sleeve, or the bottom of the linkage rod is bent and fixed with the outer sleeve pipe through the fixing sleeve.

[0009] Rubber suction cups connected with each other are arranged on both sides of the middle section of the guide pipe, two half-closed chambers are arranged on both sides of the rubber suction cups, and the inner side wall of the rubber suction cups is matched with the outer surface of the bottle body.

[0010] A gas supplement mechanism is arranged on the middle section of the guide pipe and on the outer side wall of the rubber suction cup, and the linkage rod downward movement can press air into the quantitative cavity through the gas supply pipe.

[0011] The gas supplement mechanism is a gas cylinder or a gas bag, the linkage rod downward movement drives the gas cylinder or the gas bag to be compressed, and then air is pressed into the quantitative cavity through the gas supply pipe, the gas supply pipe is installed with a gas supply one-way valve, and the gas cylinder or the gas bag is installed with an air inlet one-way valve.

[0012] A hinged seat is arranged on one side of the lower end of the composite bottle cap, a swing rod is hinged to the hinged seat through a pin shaft, and the linkage rod is in transmission connection with the inner slide rod or the outer sleeve pipe through the swing rod.

[0013] The inner end of the swing lever is provided with an inner flat hole, one side of the fixing sleeve is provided with a shaft seat, the shaft seat and the flat hole are hinged together through an inner pin shaft, the outer end of the swing lever is provided with an outer flat hole, and the lower end of the linkage lever is provided with a shaft hole which is hinged together with the outer flat hole through a pin shaft.

[0014] The present application can be operated by one hand, and the user only needs to hold the bottle body with one hand, press and relax the thumb, and then alternately take the liquid in batches. The present application can improve the speed of discharging the liquid, and fully discharge the liquid, so as to avoid the problem of incomplete discharge of the liquid and deviation of the amount of liquid supplementing into the quantitative cavity.

[0015] When the present application is used, the bottle body is inverted, four fingers hold the bottle body, the thumb presses the button, the linkage lever moves downward to drive the inner slide rod to move downward, the outer tube side hole hides in the outer guide tube, the inner tube side hole moves into the quantitative cavity, the liquid in the bottle body flows into the quantitative cavity, then the button is relaxed, the linkage lever moves upward to drive the inner slide rod to move upward, the inner tube side hole hides in the inner guide tube, the outer tube side hole is pulled out of the outer guide tube and enters the quantitative cavity, and the liquid in the quantitative cavity flows into the outer sleeve tube and is discharged through the lower end of the outer sleeve tube.

[0016] During the return stroke of the piston, the air in the upper cavity is compressed, so that the compressed air in the upper cavity can enter the bottle body, thereby increasing the pressure in the bottle body, so that the liquid in the bottle body can flow into the quantitative cavity quickly, and the air in the quantitative cavity enters the bottle through the air return pipe, thereby further increasing the air pressure in the bottle. Especially suitable for the problem that a large amount of bubbles are generated when the liquid is discharged, the rated air pressure in the bottle body is increased to break the bubbles and keep the liquid in the quantitative cavity in a liquid state. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective structure diagram of the quantitative liquid taking device of the present application;

[0018] Figure 2 is a front structure diagram of the quantitative liquid taking device of the present application;

[0019] Figure 3 is Figure 2 one of the A-A cross-sectional structure diagrams;

[0020] Figure 4 is an internal structure diagram of a cylinder;

[0021] Figure 5 is Figure 2 the second A-A cross-sectional structure diagram;

[0022] Figure 6 is a motion comparison diagram of the inner slide rod assembly.

[0023] The following components are labeled in the diagram: Bottle body 1, Composite cap 2, Inner slide rod assembly 3, Linkage assembly 4, Gas replenishment mechanism 5, Rubber suction cup 6, Bottle neck thread 11, Cap thread 12, Inner bottom plate 21, Outer bottom plate 22, Inner conduit 23, Outer conduit 24, Metering chamber 25, Return gas pipe 26, Inner sleeve 31, Outer sleeve 32, Inner tube side hole 33, Outer tube side hole 34, Limiting stop 35, Conical convex ring 36, Conical ring groove 37, Connecting seat 41, Guide tube 42, Linkage rod 43, Fixing sleeve 44, Button 45, Return spring 46, Stop handle 47, Piston 51, Return spring 52, Sealing sleeve 53, Gas supply pipe 54, T-connector 55, Gas supply check valve 56, Inlet check valve 57, Pressure boosting pipe 71, Pressure boosting check valve 72, Constant pressure exhaust valve 73. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1: A kind of Figure 1 The liquid dispensing device shown is a one-way press-type dispensing device that allows for single-handed batch dispensing of liquids. It is designed to address the current lack of efficient and accurate liquid dispensing tools. It mainly consists of a bottle body 1, a composite cap 2, an inner sliding rod assembly 3, and a linkage assembly 4. The bottle body 1's neck thread 11 is sealed and fixedly connected to the composite cap 2's cap thread 12, meaning the bottle body 1 can be removed from the composite cap 2 and reused after being filled with liquid.

[0026] Specifically, such as Figure 3 In this design, the composite bottle cap 2 comprises a cylindrical tube, an inner bottom plate 21, and an outer bottom plate 22, all three forming a single unit. The inner bottom plate 21 is located at the inner end of the cylindrical tube, and the outer bottom plate 22 is located at the outer end of the cylindrical tube. The cap thread is located at the inner end of the cylindrical tube. An inner conduit 23 is fixedly connected to the center of the inner end of the inner bottom plate 21, and an outer conduit 24 is fixedly connected to the center of the outer end of the outer bottom plate 22, forming a metering cavity 25 between the inner bottom plate 21 and the outer bottom plate 22. Figure 3 As can be seen, the inner catheter 23 is located inside the metering cavity 25, and the outer catheter 24 is located outside the metering cavity 25.

[0027] The inner slide rod assembly 3 includes an inner slide rod, with an inner sleeve 31 and an outer sleeve 32 fixedly connected to its two ends. The inner slide rod is a solid rod, while the inner sleeve 31 and outer sleeve 32 at both ends are hollow tubes. An inner tube side hole 33 and an outer tube side hole 34 are respectively provided on the sides of the inner sleeve 31 and outer sleeve 32, and the inner sleeve 31 and outer sleeve 32 are respectively fitted into the inner guide tube 23 and the outer guide tube 24.

[0028] like Figure 6As shown, the distance between the inner end of the inner sleeve 31 and the inner end of the outer sleeve 32 is a, and the distance between the two side holes is b, satisfying b>a, from Figure 6 In state (1), the liquid in the bottle flows into the quantitative cavity, and in state (2), the pressure in the quantitative cavity causes the liquid to flow out. In the change process from state (1) to state (2), first, the inner tube side hole 33 is located in the quantitative cavity 25, and then the outer tube side hole 34 begins to enter the quantitative cavity, that is, only one side hole is located in the quantitative cavity 25 at all times.

[0029] Figure 3 As can be seen in the inner bottom plate, the gas return pipe 26 is fixed, the lower end of the gas return pipe 26 is located in the quantitative cavity 25, the upper part is located near the flat bottom of the bottle body 1, the quantitative cavity 25 is provided with a gas supply pipe 54 and installs a gas supply check valve 56, the liquid in the bottle flows into the quantitative cavity 25, forcing the air in the quantitative cavity 25 to be pressed into the upper part of the bottle through the gas return pipe 26. When the liquid in the quantitative cavity 25 needs to be discharged, the outside air enters the quantitative cavity through the gas supply pipe 54, and under the action of the gas supply check valve 56, only allows air to enter the quantitative cavity 25 from the outside, and does not allow liquid to enter the gas supply pipe.

[0030] The linkage assembly 4 is used to drive the inner slide rod to slide axially outward or inward. Specifically, as Figure 1 and Figure 3 shown, the linkage assembly 4 includes a sleeve fixed to the outer wall of the composite bottle cap, one side of the sleeve is fixed with a guide pipe 42 through a connecting seat 41, the guide pipe 42 is sleeved with a linkage rod 43, the upper end of the linkage rod 43 is provided with a button 45 after being led out from the guide pipe 42, and the lower side of the button is connected with a return spring 46 between the guide pipe. The lower end of the linkage rod 43 is fixedly connected with the outer sleeve pipe 32 through a fixing sleeve 44. For example, as Figure 3 shown, a through hole is provided on one side of the outer bottom plate 22, the lower end of the linkage rod 43 is bent and introduced into the quantitative cavity 25 from the through hole, and is fixed with the inner slide rod through the fixing sleeve 44, or as Figure 5 shown, the linkage rod 43 is bent at the bottom and fixed with the outer sleeve pipe 32 through the fixing sleeve 44. Thus, after pressing the button, the linkage rod can be moved downward or reset, and after the linkage rod moves downward, the inner slide rod or the outer sleeve pipe 32 can be moved downward or returned upward.

[0031] The quantitative liquid taking device of the embodiment is applied by inverting the bottle body, holding the bottle body with four fingers of one hand below the blocking handle 47, pressing the button 45 with the thumb, moving the linkage rod 43 downward to drive the inner sliding rod to move downward, and then moving the outer tube side hole 34 downward to hide in the outer guide tube 24, moving the inner tube side hole 33 downward into the quantitative cavity 25, so that the liquid in the bottle body 1 flows into the quantitative cavity, then relaxing the button, moving the linkage rod upward under the action of the reset spring 46 to drive the inner sliding rod to move upward, moving the inner tube side hole 33 upward to hide in the inner guide tube 23, and pulling the outer tube side hole 34 out of the outer guide tube 24 and into the quantitative cavity 25, at this time the liquid in the quantitative cavity flows into the outer sleeve tube 34 from the outer tube side hole 34 and is discharged through the lower end of the outer sleeve tube 34.

[0032] Embodiment 2: On the basis of embodiment 1, further connecting rubber suction cups 6 connected to each other on both sides of the middle segment of the guide tube, the rubber suction cups 6 have two half-closed cavities on both sides, the inner side wall of the rubber suction cups 6 matches the outer surface of the bottle body 1, and the rubber suction cups are pressed inward and fixed to the side wall of the bottle body 1 during use.

[0033] Embodiment 3: On the basis of embodiment 1 or 2, further providing a gas supplementing mechanism 5, such as a gas cylinder or a gas bag, on the outer side wall of the rubber suction cup at the middle segment of the guide tube 42, the downward movement of the linkage rod 43 can drive the gas cylinder or the gas bag to compress, and then press air into the quantitative cavity 25 through the air supply pipe 54, the air supply pipe 54 is provided with an air supply one-way valve 56, and the gas cylinder or the gas bag is provided with an air inlet one-way valve 57. Compared with embodiment 1, the quantitative cavity 25 is connected with the outside through the air supply pipe 54 and the air supply one-way valve 56 in embodiment 1. In this embodiment, the air is actively pressed into the quantitative cavity 25 by compressing the gas cylinder or the gas bag, so as to promote the liquid in the quantitative cavity to be discharged as soon as possible. This method not only can improve the speed of discharging the liquid, but also can fully discharge the quantitative liquid, avoid incomplete discharge of the liquid, and solve the problem of deviation of the amount of liquid supplementing into the quantitative cavity next time.

[0034] Embodiment 4: On the basis of embodiment 3, a kind of as Figure 4The cylinder type air supplement mechanism is shown. Specifically, the air supplement mechanism includes a rectangular or circular cylinder body, a piston 51 is fitted in the cylinder body, and a linkage rod is fixed to the center of the piston. The piston divides the cylinder body into an upper chamber and a lower chamber, the lower chamber is fitted with a return spring 52, and a sealing sleeve 53 is fitted around the perforations of the upper and lower chambers. The lower chamber is connected with a three-way joint 55, one branch of the three-way joint 55 is connected to the dosing chamber through a gas supply pipe 54, and the other branch of the three-way joint 55 is provided with an air inlet one-way valve 57. The top of the upper chamber is provided with a breathing hole or valve. In the application of the present embodiment, the linkage rod is driven to move downward by pressing the button, and then pushes the piston 51 to move downward, so that the air in the inner chamber enters the dosing chamber through the gas supply pipe 54, forcing the liquid medicine in the dosing chamber to be pressed out quickly and completely. During the downward movement of the piston, the breathing hole at the top can supplement air to the upper chamber. After releasing the hand, the return spring 52 presses the piston 51 to move upward, and air is supplemented to the lower chamber through the air inlet one-way valve 57.

[0035] Example 5: On the basis of example 4, further connect the upper chamber of the cylinder body to the bottle body through a booster pipe 71, specifically connect the booster pipe 71 to the inner side of the inner bottom plate 21 through the composite bottle cap, and install a booster one-way valve 72 at the end of the booster pipe, as shown. Figure 5 The bottom of the bottle body 1 is designed to be provided with a mounting hole and fitted with a constant pressure exhaust valve 73. In the present embodiment, during the return stroke of the piston, the air in the upper chamber is compressed, so that the compressed air in the upper chamber can enter the bottle body, thereby increasing the pressure in the bottle body, so as to promote the liquid medicine in the bottle body to flow into the dosing chamber 25 quickly, and the air in the dosing chamber enters the bottle through the air return pipe 26, further increasing the air pressure in the screen. When the air pressure in the bottle increases to the rated exhaust value of the constant pressure exhaust valve 73, the excess air is exhausted through the constant pressure exhaust valve 73, so that the air pressure in the bottle body is ensured to be rated by means of air compression in the upper chamber and exhaust through the constant pressure exhaust valve, so that the liquid medicine can flow out quickly and fully each time, avoiding the problem of air bubbles in the dosing chamber. The present embodiment is especially suitable for the problem that a large amount of air bubbles are generated when the liquid medicine is discharged, a large amount of air is mixed into the liquid medicine due to the flow of the discharged liquid medicine, a large amount of air bubbles exist in the dosing chamber, the liquid medicine in the bottle body cannot be repeatedly filled into the dosing chamber, and the liquid taking is not quantitative. The present embodiment can break the air bubbles by increasing the rated air pressure in the bottle body as described above, so as to keep the liquid medicine in the dosing chamber in liquid state.

[0036] In this embodiment, the difference from the first embodiment is that when the linkage lever is pressed, the inner slide rod is moved upward, and when the hand is released, the inner slide rod is moved downward, so that the liquid medicine flows out of the quantitative cavity when the linkage lever is pressed, and the liquid medicine in the bottle flows into the quantitative cavity when the hand is released.

[0037] The above specific embodiments of the present application are merely used for illustrative explanation or interpretation of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid dispensing device in the form of a storage bottle with one-way press-to-dispense mechanism, comprising a bottle body (1), a composite bottle cap (2), an inner slide rod assembly (3), and a linkage assembly (4), wherein the bottle mouth thread (11) of the bottle body (1) is sealed and fixedly connected to the bottle cap thread (12) of the composite bottle cap (2), characterized in that, The composite bottle cap (2) includes a cylindrical tube, an inner bottom plate (21) and an outer bottom plate (22). The inner end of the inner bottom plate (21) is fixedly connected to an inner conduit (23), and the outer end of the outer bottom plate (22) is fixedly connected to an outer conduit (24). A metering cavity (25) is formed between the inner bottom plate (21) and the outer bottom plate (22). A return gas pipe (26) is fixed on the inner bottom plate. The lower end of the return gas pipe (26) is located in the metering cavity (25), and the upper part is located near the flat bottom of the bottle body (1). The metering cavity (25) is provided with a gas supply pipe (54) and a gas supply one-way valve (56) is installed. The inner slide rod assembly Component (3) includes an inner slide rod, with an inner sleeve (31) and an outer sleeve (32) fixedly connected at both ends. An inner tube side hole (33) and an outer tube side hole (34) are respectively provided on the sides of the inner sleeve (31) and the outer sleeve (32). The inner sleeve (31) and the outer sleeve (32) are respectively fitted into the inner conduit (23) and the outer conduit (24). The distance between the inner end of the inner sleeve (31) and the inner end of the outer sleeve (32) is a, and the distance between the two side holes is b, satisfying b > a, so that only one side hole is always located in the metering chamber (25). The linkage component (4) is used to drive the inner slide rod to... The linkage assembly (4) includes an outer sleeve fixed to the outer wall of the composite bottle cap. One side of the outer sleeve is fixed with a guide tube (42) via a connecting seat (41). A linkage rod (43) is fitted inside the guide tube (42). A button (45) is installed at the upper end of the linkage rod (43) after it extends out from the guide tube (42). A reset spring (46) is connected between the lower side of the button and the guide tube. The lower end of the linkage rod (43) is fixedly connected to the outer sleeve (32) via a fixing sleeve (44). An air replenishment mechanism (5) is provided in the middle section of the guide tube (42) and on the outer wall of the rubber suction cup. The downward movement of the linkage rod (43) can drive the air replenishment mechanism (5) to press air into the metering chamber (25) through the air supply pipe (54); the air replenishment mechanism includes a rectangular or circular cylinder, in which a piston (51) is fitted and matched. The piston divides the cylinder into an upper chamber and a lower chamber. The lower chamber is connected to a three-way connector (55). One end of the three-way connector (55) is connected to the metering chamber through the air supply pipe (54). The other end of the three-way connector (55) is equipped with an air inlet one-way valve (57). A breathing hole or valve is provided at the top of the upper chamber; the bottom of the bottle body (1) is designed to have an assembly hole and a fixed pressure exhaust valve (73) is fitted.

2. The liquid dispensing device of the storage bottle type with one-way press-to-dispense according to claim 1, characterized in that, A through hole is provided on one side of the outer base plate (22). The lower end of the linkage rod (43) is bent and introduced into the metering chamber (25) through the through hole. It is fixed to the inner slide rod by the fixing sleeve (44). Alternatively, the bottom of the linkage rod (43) is bent and fixed to the outer tube (32) by the fixing sleeve (44).

3. The liquid dispensing device of the storage bottle type with one-way press-to-dispense according to claim 1, characterized in that, A connected rubber suction cup (6) is connected to both sides of the middle section of the guide tube. Each side of the rubber suction cup (6) has two semi-closed chambers. The inner wall of the connected rubber suction cup (6) matches the outer surface of the bottle body (1).

4. The liquid dispensing device of the storage bottle type with one-way press-to-dispense according to claim 1, characterized in that, A hinge seat is provided on one side of the lower end of the composite bottle cap (2). The hinge seat is hinged to a rocker arm by a pin. The linkage rod is connected to the inner slide rod or outer sleeve (32) through the rocker arm.

5. The liquid dispensing device of the storage bottle type with one-way press according to claim 1, characterized in that, The inner end of the swing arm is provided with an inner flat hole, and a bearing seat is provided on one side of the fixed sleeve (44). The bearing seat and the flat hole are hinged together by an inner pin. The outer end of the swing arm is provided with an outer flat hole, and the lower end of the linkage rod is provided with a shaft hole. The shaft hole and the outer flat hole are hinged together by a pin.

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