CN210108782U

CN210108782U - Air pump

Info

Publication number: CN210108782U
Application number: CN201920613494.9U
Authority: CN
Inventors: 闫林刚; 肖蒙
Original assignee: Shenzhen Daken Technology Co Ltd
Current assignee: Shenzhen Daken Technology Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-02-21
Anticipated expiration: 2029-04-28

Abstract

The utility model is suitable for the technical field of medical equipment, and provides an air pump, which comprises a pipette for supporting a sampling head, a piston rod slidably arranged in the pipette, a guide tube sleeved on the pipette and abutted against the sampling head, and a slider sleeved on the piston rod and used for pushing the guide tube to remove the sampling head; the guide tube is arranged between the sampling head and the sliding block. Compared with the prior art, the utility model discloses a cover is established and is fixed with the slider on the piston rod, and when the sampling head was changed to needs, the piston rod was along pipette lapse, when the slider contacted with the stand pipe, and the liquid injection in the pipette was accomplished. In the process that the piston rod continues to slide downwards, the sliding block drives the guide pipe to slide downwards, and the guide pipe supports and pushes the sampling head until the sampling head is removed. Therefore, the air pump can automatically complete the operation of removing the sampling head, the sampling head replacement efficiency is high, and the labor cost is low.

Description

Air pump

Technical Field

The utility model belongs to the technical field of medical equipment, more specifically say, relate to an air pump.

Background

Along with the rapid development of science and technology, in the medical technical field, the automatic liquid-moving equipment replaces the traditional manual liquid-moving, has improved liquid-moving operation's efficiency greatly.

When a plurality of liquids need to be taken and put, the sampling head needs to be replaced, namely one target liquid corresponds to one sampling head, so that cross contamination among the target liquids caused by one sampling head is prevented. However, when the sampling head is replaced, the existing automatic pipetting equipment still needs to manually remove and replace the sampling head, that is, the automatic pipetting equipment cannot automatically remove the sampling head, so that the efficiency of replacing the sampling head is low, and the labor cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air pump to solve the automatic transfer liquid equipment that exists among the prior art and can't be automatic to be got off the sampling head and lead to the sampling head to change the problem of inefficiency.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is an air pump including:

a pipette for supporting a sampling head;

a piston rod slidably mounted in the pipette;

the guide pipe is sleeved on the pipette and used for abutting against the sampling head on the pipette;

and the sliding block is sleeved and fixed on the piston rod and is used for pushing the guide pipe to enable the guide pipe to take off the sampling head.

Furthermore, the piston rod is hollow, one end of the piston rod is an open end, and the other end of the piston rod is a closed end; the air pump also comprises a screw rod for driving the sliding block to move and a driving assembly for driving the screw rod to rotate, one end of the screw rod is connected with the driving assembly, the other end of the screw rod penetrates through the sliding block and extends into the piston rod, and the sliding block is installed on the screw rod.

Furthermore, the driving assembly comprises a first gear sleeved and fixed on the screw rod, a second gear meshed with the first gear and a driving device for driving the second gear to rotate; the driving device is connected with the second gear.

Furthermore, the air pump also comprises a shell for supporting the driving device and at least one stop block arranged on the sliding block, a sliding groove for guiding the sliding block to slide is formed in the shell, and the sliding block and the stop block are arranged in the sliding groove.

Further, the pipette comprises a pipette for supporting a sampling head and a hollow tube communicating with the pipette, the piston rod being slidably mounted in the hollow tube.

Further, the air pump also comprises a support frame for respectively supporting the pipette and the hollow pipe, a control main board, a reed pipe, a magnet block and two pole pieces, wherein the control main board is installed on the support frame, the magnet block is used for controlling the reed pipe to be connected or disconnected, the two pole pieces are connected with and support the reed pipe, the magnet block is installed on the guide pipe, and the two pole pieces are connected with the control main board.

Furthermore, the air pump also comprises a spring sleeved on the hollow pipe, one end of the spring is connected with the guide pipe, and the other end of the spring is connected with the sliding block.

Further, the air pump also comprises a pressure sensor which is used for measuring the pressure between the end part of the piston rod and the liquid level when the liquid is contained in the pipette, and the pressure sensor is electrically connected with the control main board.

Furthermore, the hollow tube is an insulating tube made of an insulating material, the pipette is made of a metal material, one end of one of the pole pieces is connected with the hollow tube, one end of the other pole piece is connected with the pipette, an avoiding groove for accommodating the reed switch is formed in the guide tube, and the pole piece connected with the hollow tube extends into the avoiding groove.

Further, the air pump also comprises a piston ring for sealing the joint of the piston rod and the sliding block.

The utility model provides an air pump's beneficial effect lies in: compared with the prior art, the utility model discloses a cover is established and is fixed with the slider on the piston rod, and when the sampling head was changed to needs, the piston rod was along pipette lapse, when the slider contacted with the stand pipe, and the liquid injection in the pipette was accomplished. In the process that the piston rod continues to slide downwards, the sliding block drives the guide pipe to slide downwards, and the guide pipe supports and pushes the sampling head until the sampling head is removed. Therefore, the air pump can automatically complete the operation of removing the sampling head, the sampling head replacement efficiency is high, and the labor cost is low.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a front view of an air pump according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a first cross-sectional view of an air pump according to an embodiment of the present invention;

fig. 4 is a second sectional view of the air pump according to the embodiment of the present invention;

FIG. 5 is a schematic view of a partial structure of an air pump according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view at B of FIG. 5;

fig. 7 is a schematic structural view illustrating a connection between a driving assembly and a screw rod according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a guide tube according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a slider according to an embodiment of the present invention;

fig. 10 is an explosion diagram of the connection of the screw rod, the slider, the piston ring, the piston rod, the hollow tube and the spring according to the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a pipette; 2-a sampling head; 3-controlling the main board; 4-detecting the patch; 5-a grounding plate; 6-reed pipe; 7-a guide tube; 71-avoidance groove; 72-a groove; 73-a guide plate; 74-barrier strip; 8-a drive assembly; 81-a slide block; 811-a stop; 82-a screw rod; 83-a drive means; 84-a first gear; 85-a second gear; 9-a magnet block; 10-head fading pipe; 11-a housing; 110-a chute; 12-a hollow tube; 13-a piston rod; 14-a spring; 15-a support frame; 16-a pressure sensor; 17-a piston ring; 18-a stop collar.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 10, an air pump according to an embodiment of the present invention will be described. The air pump includes a pipette (not shown) for storing liquid, a piston rod 13 slidably mounted in the pipette, a guide tube 7 fitted over the pipette and abutting against the sampling head 2, and a slider 81 fitted over and fixed to the piston rod 13. The sampling head 2 can be installed at the end of a pipette, and drives the piston rod 13 to move up and down under the action of external force, so that the sampling head 2 is matched to take and place liquid.

The embodiment of the utility model provides an air pump, compared with the prior art, the utility model discloses a cover is established and is fixed with slider 81 on piston rod 13, and when needs are changed sampling head 2, piston rod 13 slides down along the pipette, and when slider 81 contacted with stand pipe 7, the liquid injection in the pipette was accomplished. In the process that the piston rod 13 continues to slide downwards, the sliding block 81 drives the guide pipe 7 to slide downwards, and the guide pipe 7 pushes the sampling head 2 until the sampling head 2 is removed. Therefore, the air pump can automatically complete the operation of removing the sampling head 2, the replacement efficiency of the sampling head 2 is high, and the labor cost is low.

Further, please refer to fig. 3, fig. 5 and fig. 7 together, as a specific embodiment of the air pump according to an embodiment of the present invention, one end of the piston rod 13 is an open end, and the other end of the piston rod 13 is a closed end; the air pump also comprises a screw rod 82 for driving the sliding block 81 to move and a driving assembly 8 for driving the screw rod 82 to rotate, one end of the screw rod 82 is connected with the driving assembly 8, the other end of the screw rod 82 penetrates through the sliding block 81 and extends into the piston rod 13 at the opening end, and the sliding block 81 is installed on the screw rod 82. With the structure, the driving assembly 8 can drive the screw rod 82 to rotate forwards and backwards, the forward and backward rotation of the screw rod 82 can drive the sliding block 81 to move up and down, and the piston rod 13 connected with the sliding block 81 can also move up and down together, so that the liquid taking and placing operation is realized. Therefore, the driving assembly 8 and the lead screw 82 drive the sliding block 81 to move, so that the automatic operation of taking and placing liquid and removing the sampling head 2 can be realized, and the liquid removing efficiency is further improved.

Further, referring to fig. 7, as a specific implementation manner of the air pump according to the embodiment of the present invention, the driving assembly 8 includes a first gear 84 sleeved and fixed on the screw 82, a second gear 85 engaged with the first gear 84, and a driving device 83 for driving the second gear 85 to rotate; the drive means 83 is connected to the second gear wheel 85. With the structure, when the driving device 83 works to drive the second gear 85 to rotate, the first gear 84 meshed with the second gear 85 drives the screw rod 82 to rotate together, and then the piston rod 13 is driven by the sliding block 81 to move up and down in the pipette. The transmission is carried out through the gear, and the transmission device has the advantages of high transmission precision, high efficiency, compact structure, long service life and the like. Alternatively, the driving device 83 may be a motor, which is not limited herein.

Optionally, the transmission ratio of the first gear 84 to the second gear 85 is greater than 1, that is, the smaller second gear 85 drives the larger first gear 84 to rotate, so that the power output efficiency of the driving device 83 can be improved, and time and labor are saved.

Or, the transmission ratio of the first gear 84 to the second gear 85 may also be smaller than 1, that is, the larger second gear 85 drives the smaller first gear 84, so that the rotation speed of the first gear 84 can be increased, and the moving speed of the piston rod 13 can be increased.

In other embodiments, the transmission ratio of the first gear 84 to the second gear 85 may also be equal to 1, and is not limited herein.

Further, referring to fig. 3 and fig. 9, as a specific implementation of the air pump according to an embodiment of the present invention, the air pump further includes a housing 11 supporting the driving device 83 and at least one stopper 811 mounted on the slider 81, the housing 11 is provided with a sliding slot 110 for guiding the slider 81 to slide, and the slider 81 and the stopper 811 are both disposed in the sliding slot 110. Optionally, two ends of the sliding block 81 are respectively provided with a stop 811; the stop 811 is integrally formed with the slider 81 for easy manufacture and is not limited herein. The cross section of the slide groove 110 coincides with the cross section of the integral configuration formed by the slider 81 and the stopper 811. This structure, through the spout 110 location direction, can improve the precision that slider 81 reciprocated to and prevent that slider 81 from rotating, and then arouse the rotational friction of piston rod 13.

Alternatively, the guide tube 7 is assembled by two guide pieces 73, thereby facilitating the attachment and detachment of the guide tube 7. On the side of each guide plate 73 facing the slide 81, a bar 74 extends, which bar 74 can cooperate with a corresponding stop 811 on the slide 81. When the sliding block 81 slides downwards, the stop block 811 pushes the stop strip 74, so that the guide tube 7 is removed from the sampling head 2.

Optionally, the air pump further includes a limiting ring 18 sleeved on the screw rod 82 and fixed on the housing 11. When the screw rod 82 drives the sliding block 81 to move upwards, the limiting ring 18 can resist the sliding block 81, so that the sliding block 81 is limited to continue to move upwards, and the reliability of liquid taking is improved. The stop collar 18 may be integrally formed with the housing 11 for ease of manufacturing and is not limited herein.

Further, please refer to fig. 4 together, as a specific implementation manner of the air pump provided by the embodiment of the present invention, the pipette includes a pipette 1 for supporting the sampling head 2 and a hollow tube 12 communicated with the pipette 1, a piston rod 13 is slidably installed in the hollow tube 12, and the sampling head 2 is installed at the end of the pipette 1. By dividing the pipette into the pipette 1 and the hollow tube 12, when taking and placing liquid, the liquid is only stored in the pipette 1, and a certain distance exists between the closed end of the piston rod 13 and the liquid level, so that the contact between the liquid and the piston rod 13 can be effectively avoided, and the cross contamination caused by taking and placing another liquid by an air pump can be prevented.

Further, please refer to fig. 4 to fig. 6 together, as a specific implementation manner of the air pump provided in the embodiment of the present invention, the air pump further includes a support frame 15 supporting the pipette 1 and the hollow tube 12, a control main board 3 installed on the support frame 15, a reed pipe 6, a magnet block 9 for controlling the on/off of the reed pipe 6, and two pole pieces (not shown) connected to and supporting the reed pipe 6, wherein the magnet block 9 is installed on the guide tube 7, and the two pole pieces are connected to the control main board 3. Optionally, the two pole pieces include a probe piece 4 with one end electrically connected to the control motherboard 3 and the other end connected to the pipette 1, and a ground piece 5 with one end electrically connected to the control motherboard 3 and the other end connected to the hollow tube 12. The pipette 1 is made of a metallic conductive material and the pipette 1 is electrically connected to the probe chip 4. The hollow tube 12 is made of insulating material, and the grounding piece 5 is connected with the hollow tube 12 to realize grounding.

Optionally, the reed switch 6 is a normally open type reed switch 6, which is not limited herein. When the pipette 1 is not provided with the sampling head 2, the magnet block 9 on the guide tube 7 is close to the reed switch 6, at the moment, the reed switch 6 is conducted under the action of the magnetic field of the magnet block 9, the detection piece 4 and the grounding piece 5 are in short circuit and keep a disconnected state, and the control mainboard 3 cannot receive a capacitance signal between the detection piece 4 and the grounding piece 5; when the sampling head 2 is installed on the pipette 1, the guide pipe 7 is upwards supported and pushed for a certain distance by the sampling head 2, the magnet block 9 is far away from the reed pipe 6, the reed pipe 6 is disconnected due to the fact that the reed pipe is free from the action of external magnetic field force, the detection piece 4 and the grounding piece 5 are communicated and kept in a conducting state, and the control mainboard 3 receives capacitance signals between the detection piece 4 and the grounding piece 5. Therefore, the air pump can determine whether the main board 3 receives the capacitance signal between the detection sheet 4 and the grounding sheet 5, and can realize self-identification of the sampling head 2, and the sensitivity is high. Moreover, when carrying out the imbibition operation through piston rod 13, when liquid pours into pipette 1 into, detect piece 4 through detecting different liquid level height in pipette 1, can form different capacitance signal between with grounding plate 5, control mainboard 3 accessible different capacitance signal effectively judges the liquid level height in pipette 1, realizes the accurate liquid operation of getting and put.

Further, referring to fig. 4 and fig. 6, as a specific implementation of the air pump according to an embodiment of the present invention, the air pump further includes a spring 14 sleeved on the hollow tube 12, one end of the spring 14 is connected to the guide tube 7, and the other end is connected to the slider 81. With the structure, when the slide block 81 drives the guide tube 7 to move downwards to remove the sampling head 2, the spring 14 can play a certain role in buffering and resetting, and the use safety of the air pump is improved.

Optionally, the air pump further includes a head-removing tube 10 for removing the sampling head 2, the head-removing tube 10 is sleeved on the pipette 1, and the head-removing tube 10 is located between the guide tube 7 and the sampling head 2. In the structure, when the screw rod 82 drives the sliding block 81 to move downwards for liquid injection, when the sliding block 81 is in contact with the guide pipe 7, the liquid injection is finished; in the process that the sliding block 81 continues to move downwards, the pushing guide pipe 7 and the head removing pipe 10 move downwards, and the head removing pipe 10 can remove the sampling head 2, so that the automatic removing operation of the sampling head 2 can be realized, the manual operation of removing the sampling head 2 is omitted, and time and labor are saved. The effective removal of the sampling head 2 within the travel of the guide tube 7 can be ensured by the arrangement of the head removal tube 10.

Further, referring to fig. 6, as a specific implementation of the air pump provided in the embodiment of the present invention, the air pump further includes a pressure sensor 16 for measuring the pressure between the end of the piston rod 13 and the liquid level when the liquid is contained in the pipette 1, and the pressure sensor 16 is electrically connected to the control main board 3. This structure, when carrying out the imbibition operation, form the negative pressure intensity between piston rod 13 bottom and the liquid level, if sampling head 2 takes place to block up, then this negative pressure intensity can rise rapidly, and pressure sensor 16 senses the negative pressure intensity of this rising, and affirmation sampling head 2 damages to remind the staff in time to change. On the contrary, in the same way, when the liquid discharging operation is carried out, positive pressure is formed between the bottom of the piston rod 13 and the liquid level, if the sampling head 2 is blocked, the positive pressure can be rapidly raised, the pressure sensor 16 senses the raised positive pressure, the sampling head 2 is determined to be damaged, and the working personnel is reminded to replace the sampling head in time. Therefore, the pressure sensor 16 is used for detecting the pressure between the piston rod 13 and the liquid level, whether the sampling head 2 is damaged or blocked can be detected, the testing sensitivity is high, and convenience and rapidness are realized.

Further, please refer to fig. 6 and 8 together, as a specific implementation manner of the air pump provided by the embodiment of the present invention, the hollow tube 12 is an insulating tube made of an insulating material, the pipette 1 is made of a metal material, one end of the detecting piece 4 can be installed on the pipette 1, one end of the grounding piece 5 is installed on the hollow tube 12 to realize grounding, the guiding tube 7 is provided with an avoiding groove 71 for avoiding the reed tube 6, and the grounding piece 5 extends into the avoiding groove 71. Alternatively, the escape groove 71 is provided along the axial direction of the guide pipe 7. This structure dodges reed pipe 6 through setting up and dodge groove 71, can effectively realize the reciprocating of stand pipe 7 on pipette 1, and the magnet piece 9 of being convenient for is close to or keeps away from reed pipe 6, also plays certain spacing guide effect simultaneously. Moreover, the grounding strip 5 extends into the avoiding groove 71, when the sampling head 2 is removed, the grounding strip 5 can effectively prevent the avoiding groove 71, and the travel of the guide tube 7 can be effectively limited through the cooperation with the spring 14.

Optionally, the guide tube 7 is further provided with a groove 72 for supporting the magnet block 9, and the magnet block 9 is mounted in the groove 72. This structure through setting up recess 72, can realize the quick location installation of magnet piece 9, the dismouting of the magnet piece 9 of also being convenient for, easy dismounting.

Further, referring to fig. 10, as a specific implementation of the air pump provided by the embodiment of the present invention, the air pump further includes a piston ring 17 for sealing a connection between the piston rod 13 and the slider 81. This structure can effectively improve the sealing performance who is connected between piston rod 13 and the slider 81 through piston ring 17, effectively avoids outside impurity to get into hollow tube 12, and then gets into pipette 1 in, causes the pollution to the target liquid.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An air pump, comprising:

a pipette for supporting a sampling head;

a piston rod slidably mounted in the pipette;

2. An air pump according to claim 1, wherein: the piston rod is hollow, one end of the piston rod is an open end, and the other end of the piston rod is a closed end; the air pump also comprises a screw rod for driving the sliding block to move and a driving assembly for driving the screw rod to rotate, one end of the screw rod is connected with the driving assembly, the other end of the screw rod penetrates through the sliding block and extends into the piston rod, and the sliding block is installed on the screw rod.

3. An air pump according to claim 2, wherein: the driving assembly comprises a first gear, a second gear and a driving device, wherein the first gear is sleeved and fixed on the screw rod, the second gear is meshed with the first gear, and the driving device is used for driving the second gear to rotate; the driving device is connected with the second gear.

4. An air pump according to claim 3, wherein: the air pump also comprises a shell for supporting the driving device and at least one stop block arranged on the sliding block, wherein the shell is provided with a sliding groove for guiding the sliding block to slide, and the sliding block and the stop block are arranged in the sliding groove.

5. An air pump according to claim 1, wherein: the pipette comprises a pipette used for supporting a sampling head and a hollow tube communicated with the pipette, and the piston rod is installed in the hollow tube in a sliding mode.

6. An air pump according to claim 5, wherein: the air pump also comprises a support frame for respectively supporting the pipette and the hollow pipe, a control main board, a reed pipe, a magnet block and two pole pieces, wherein the control main board is arranged on the support frame, the magnet block is used for controlling the reed pipe to be connected or disconnected, the two pole pieces are connected and support the reed pipe, the magnet block is arranged on the guide pipe, and the two pole pieces are connected with the control main board.

7. An air pump according to claim 5, wherein: the air pump also comprises a spring sleeved on the hollow pipe, one end of the spring is connected with the guide pipe, and the other end of the spring is connected with the sliding block.

8. An air pump according to claim 6, wherein: the air pump also comprises a pressure sensor which is used for measuring the pressure between the end part of the piston rod and the liquid level when the liquid is contained in the pipette, and the pressure sensor is electrically connected with the control main board.

9. An air pump according to claim 6, wherein: the hollow tube is an insulating tube made of insulating materials, the pipette is made of metal materials, one end of one pole piece is connected with the hollow tube, one end of the other pole piece is connected with the pipette, an avoiding groove for accommodating the reed switch is formed in the guide tube, and the pole piece connected with the hollow tube extends into the avoiding groove.

10. An air pump according to any of claims 1 to 9 wherein: the air pump also comprises a piston ring for sealing the joint of the piston rod and the sliding block.