CN209943057U

CN209943057U - Air pump and electronic sphygmomanometer

Info

Publication number: CN209943057U
Application number: CN201920633404.2U
Authority: CN
Inventors: 王鹏; 陈龙
Original assignee: Dongguan Kangzhu Medical Technology Co Ltd
Current assignee: Dongguan Kangzhu Medical Technology Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-14
Anticipated expiration: 2029-04-30

Abstract

The utility model is suitable for the technical field of medical equipment, an air pump and an electronic sphygmomanometer are provided, the air pump comprises a shell, a motor arranged outside the shell, a transmission component arranged in the shell, a diaphragm pump and a check valve, a partition plate is arranged inside the shell, a through hole is arranged on the partition plate, the motor is arranged outside the shell, the transmission component is arranged inside the shell and connected with the motor, the diaphragm pump is arranged inside the shell and connected with the transmission component, and inflates to one side of a gas outlet through the through hole, the check valve is arranged in the through hole, the partition plate and the inner wall of the first end of the shell are arranged at intervals, so that a buffer air chamber is formed between the partition plate and the inner wall, the buffer air chamber is communicated with the gas outlet, in the process that the motor drives the transmission component and further drives the diaphragm pump to move, the air flow pushed, the fluctuation of the air pressure is reduced, and the gas is ensured to be stably discharged from the gas outlet.

Description

Air pump and electronic sphygmomanometer

Technical Field

The utility model relates to the technical field of medical equipment, in particular to air pump and electronic sphygmomanometer.

Background

The electronic sphygmomanometer is a medical device for measuring blood pressure by using modern electronic technology and an indirect blood pressure measuring principle. The electronic sphygmomanometer adopts an oscillometric method to measure blood pressure, and particularly, small pulses transmitted from an arm to a cuff are identified by an instrument, are differentiated, and form an envelope line capable of reflecting a pulse peak value through multiple processing, so that a blood pressure value is obtained.

When the blood pressure is measured by the pressure-increasing oscillometric method, the blood pressure is measured at a constant speed in the pressurizing process.

Fig. 1 shows that current air pump 001's structure, motor 002 set up in the casing 003 outside to be connected to the drive mechanism 004 in the casing 003, two diaphragm pumps 005 are connected to drive mechanism 004, are equipped with check valve 007 in one side that drive mechanism 004 was kept away from to diaphragm pump 005, and one side that the casing 003 is close to check valve 007 forms gas outlet 008, and the rotation of motor 002 drives two diaphragm pumps 005 and promotes forward in proper order, and consequently, two diaphragm pumps 005 push away gas towards gas outlet 008 one side in turn. Therefore, the fluctuation of the air flow is large, the pressure boosting process is unstable due to the fluctuation of the air flow, and the accuracy of the pulse signal is interfered.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air pump aims at solving the current air pump and at the obvious technical problem of air current fluctuation in the process of stepping up.

The utility model discloses a realize like this, an air pump, include:

the air conditioner comprises a shell, a first air inlet and a second air inlet, wherein a partition plate is arranged in the shell, the shell is provided with a first end and a second end which are respectively positioned at two sides of the partition plate, the first end of the shell is provided with an air outlet, and the partition plate is provided with a through hole;

a motor disposed outside the housing and proximate the second end;

the transmission assembly is arranged on one side, close to the second end, in the shell and connected to the motor;

the diaphragm pump is arranged on one side, close to the second end, in the shell, connected to the transmission assembly and used for inflating one side, close to the air outlet, of the partition plate through the through hole;

the check valve is arranged in the through hole;

the partition plate and the inner wall of the first end of the shell are arranged at intervals, a buffering air chamber is formed between the partition plate and the inner wall of the first end of the shell, and the buffering air chamber is communicated with the air outlet.

In one embodiment, a first flow blocking piece extending towards the partition plate is arranged on an inner wall of the first end, and the check valve and the air outlet are respectively located on two sides of the first flow blocking piece.

In one embodiment, the first flow blocker includes a plurality of platelets mounted at intervals around the air outlet; alternatively, the first and second electrodes may be,

the first flow blocking piece is annular and is arranged around the air outlet.

In one embodiment, the air pump further includes a second flow blocking member mounted on the first flow blocking member and disposed corresponding to the air outlet.

In one embodiment, the second flow blocking element includes a bottom wall and a side wall connected to a periphery of the bottom wall, the bottom wall is disposed opposite to the air outlet and keeps a gap with the air outlet, the side wall is disposed close to the first flow blocking element and keeps a gap with the first flow blocking element, and at least one air hole is formed in the side wall.

In one embodiment, a dimension of an end of the second spoiler remote from the air outlet is larger than a dimension of an end of the second spoiler close to the air outlet, and an end of the second spoiler remote from the air outlet is compressed inside the first spoiler.

In one embodiment, an inner dimension of the first spoiler at an end thereof remote from the air outlet is larger than an inner dimension thereof near the air outlet to form a stepped structure on the first spoiler, and an end thereof remote from the air outlet on the second spoiler further abuts against the stepped structure.

In one embodiment, the second spoiler is an elastomeric material.

In one embodiment, the number of the through holes is two, the through holes are respectively and oppositely arranged at the position close to the edge of the partition plate, and the air outlet is arranged corresponding to the center of the partition plate; the inner diameter of the air outlet is 0.3-1.0 mm, and the height of the buffer air chamber is 2-50 mm.

Another object of the present invention is to provide an electronic sphygmomanometer, including:

the air pump according to each of the above embodiments; and

and the air bag is communicated with an air outlet of the air pump, and the air pump pumps gas into the air bag.

The embodiment of the utility model provides an air pump and sphygmomanometer's beneficial effect lies in:

the air pump comprises a shell, a motor arranged outside the shell, a transmission assembly arranged in the shell, a diaphragm pump and a check valve, wherein a partition plate is arranged inside the shell and is provided with a first end and a second end which are respectively positioned at two sides of the partition plate, the first end of the shell is provided with an air outlet, the partition plate is provided with a through hole, the motor is arranged outside the shell and is close to the second end, the transmission assembly is arranged inside the shell and is positioned at one side of the partition plate close to the second end, the transmission assembly is connected to the motor, the diaphragm pump is arranged inside the shell and is positioned at one side of the partition plate close to the second end, the diaphragm pump is connected to the transmission assembly and inflates air to one side of the partition plate close to the first end through the through hole, the check valve is arranged in the through hole, the partition plate and the inner wall of the first end of, the air current pushed in by the diaphragm pump is firstly buffered through the buffering air chamber and then discharged from the air outlet, so that the flowing of air can be buffered to a certain extent, the fluctuation of air pressure is reduced, the air is ensured to be stably discharged from the air outlet, the air current buffering device is applied to an electronic sphygmomanometer, the boosting process can be more stable, and the accuracy of a measured pulse signal is further ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments 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 that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a prior art air pump;

FIG. 2 is a schematic diagram of an air pump according to an embodiment of the present invention;

FIG. 3 is a schematic view of another structure of an air pump provided in an embodiment of the present invention;

FIG. 4 is a top view I corresponding to FIG. 3;

FIG. 5 is a second top view corresponding to FIG. 3;

FIG. 6 is a schematic view of another structure of an air pump provided in an embodiment of the present invention;

FIG. 7 is an enlarged view at A in FIG. 6;

fig. 8 is a schematic structural diagram of an electronic sphygmomanometer according to an embodiment of the present invention.

The designations in the figures mean:

001-air pump, 002-motor, 003-shell, 004-transmission mechanism, 005-diaphragm pump, 006-check valve, 007-air outlet;

100-an air pump; 1-motor, 11-current input end, 12-output shaft; 2-shell, 20-buffer air chamber, 21-front cover, 22-partition plate, 220-through hole, 23-back cover, 230-hole, 24-air outlet, 212-inner wall; 3-transmission component, 30-output end; 4-a diaphragm pump; 5-a check valve; 6-first spoiler, 61-lamina, 62-mating structure; 7-second flow resisting piece, 70-groove, 71-bottom wall, 72-side wall, 720-air hole, 73-step structure; 200-electronic sphygmomanometer, 9-air sac, 8-air pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only 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 or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

In order to explain the technical solution of the present invention, the following detailed description is made with reference to the specific drawings and examples.

Referring to fig. 2, an embodiment of the present invention first provides an air pump 100, which includes a housing 2, a motor 1 disposed outside the housing 2, and a driving assembly 3, a diaphragm pump 4 and a check valve 5 disposed inside the housing 2, wherein a partition 22 is disposed inside the housing 2, the partition 22 divides an inner space of the housing 2 into two parts, the housing 2 has a first end and a second end respectively disposed at both sides of the partition 22, the first end of the housing 2 is provided with an air outlet 24, the partition 22 is provided with a through hole 220, the motor 1 is disposed outside the housing 2 and near the second end, the driving assembly 3 is disposed inside the housing 2 and located at a side of the partition 22 near the second end, the driving assembly 3 is connected to the motor 1, the diaphragm pump 4 is disposed inside the housing 2 and located at a side of the partition 22 near the second end, the diaphragm pump 4 is connected to the driving assembly 3, and inflates air, the check valve 5 is installed in the through hole 220 to make the air flow from the diaphragm pump 4 side to the air outlet 24 side through the through hole 220 in a single direction, wherein the partition plate 22 is disposed at an interval from the inner wall 212 of the first end of the housing 2 to form a buffer air chamber 20 therebetween, and the buffer air chamber 20 is communicated with the air outlet 24.

The embodiment of the utility model provides an air pump 100, the inside division board 22 of casing 2 sets up with the looks interval between the inner wall 212 of the first end that is provided with gas outlet 24 of casing 2, thereby form buffering air chamber 20 between division board 22 and this inner wall 212, drive the in-process that transmission assembly 3 moved and then drove diaphragm pump 4 action at motor 1, the gas that is pushed into by diaphragm pump 4 cushions through buffering air chamber 20 earlier, then discharge from gas outlet 24, can carry out certain buffering to the flow of gas, reduce the volatility of atmospheric pressure, guarantee that gas steadily discharges from gas outlet 24.

Wherein the case 2 includes a front cover 21 and a rear cover 23, the front cover 21 and the rear cover 23 are butt-mounted to define an inner space thereof, and the partition plate 22 divides the inner space of the case 2 into two parts. The partition plate 22 may be attached to the inner surfaces of the front cover 21 and the rear cover 23 such that the side end portion of the partition plate 22 is not visible from the outside of the case 2; of course, the partition plate 22 may also be provided between the front cover 21 and the rear cover 23, and the partition plate 22 is installed with both surfaces of both sides thereof opposite to the front cover 21 and the rear cover 23, respectively, such that the side end portion of the partition plate 22 is visible from the outside of the case 2 and only a portion of the partition plate 22 from which the edge thereof is removed serves to partition the inner space of the case 2. However, these methods do not substantially affect the division of the partition plate 22 into the internal space of the housing 2, and do not substantially affect the definition of the partition plate 22 inside the housing 2, and can be selected according to specific needs.

In this embodiment, the air outlet 24 and the first end are located on the front cover 21, and the second end is located on the rear cover 23.

In fig. 2, the electric machine 1 comprises two current input terminals 11 for receiving an external drive current. The output shaft 12 of the motor 1 extends into the casing 2 through the opening 230 at the second end to be connected with the transmission assembly 3 in a transmission manner, the transmission assembly 3 converts the rotation of the output shaft 12 of the motor 1 into an output form capable of driving the diaphragm pump 4 to do reciprocating motion, so that the diaphragm pump 4 does reciprocating motion under the driving of the motor 1 to continuously fill gas into the through hole 220.

In one embodiment, the driving assembly 3 comprises two output ends 30, each output end 30 is connected with one diaphragm pump 4, and the two diaphragm pumps 4 act in turn to push the gas to flow to one side of the gas outlet 24 in turn. Correspondingly, the number of the through holes 220 on the partition plate 22 and the check valves 5 thereof are also two, and can be respectively disposed near two opposite edges of the partition plate 22, and the air outlet 24 is preferably correspondingly disposed at the center position of the inner wall 212, so that the two through holes 220 are equivalently located at two sides of the air outlet 24. The air flow from the through hole 220 does not directly flow to the air outlet 24, so that the fluctuation of the air flow can be buffered to a certain extent, which is beneficial to the stability of the air flow.

The height of the buffer air chamber 20, that is, the distance between the inner wall 212 provided with the air outlet 24 and the partition plate 22 is set according to the volume of the entire air pump 100. Specifically, the height of the buffer air chamber 20 may be 2 mm to 50 mm, so that the air flow can be buffered significantly and an excessive space is not occupied. Taking the air pump 100 as an example for an electronic blood pressure monitor, the height of the housing 2 (the length from the first side to the second side) is not more than about 30 mm, and the height of the buffer air chamber 20 can be set to 5 mm to 15 mm. In one embodiment, the height of the buffer air chamber 20 is 8 mm to 12 mm. Further, the height of the buffer air chamber 20 may be 10 mm.

The inner diameter of the air outlet 24 also affects the fluctuation of the air flow. The smaller the inner diameter of the air outlet 24, the more significant the buffering of the air flow, and the less significant the fluctuation of the air pressure. Of course, the inner diameter of the air outlet 24 is not as small as possible, and if the inner diameter of the air outlet 24 is too small, the air pump 100 may not meet the actual requirement. In one embodiment, the inner diameter of the air outlet 24 may be 0.3 mm to 1.0 mm. Further, the inner diameter of the air outlet 24 may be 0.4 mm to 0.6 mm.

Referring to fig. 3, in an embodiment, the inner wall 212 where the air outlet 24 is located is further provided with a first spoiler 6 extending toward the partition 22, and the through hole 220 and the air outlet 24 are respectively located at two sides of the first spoiler 6. After entering from the through hole 220, the airflow needs to continuously bypass the first flow blocking element 6 to reach the air outlet 24, so that the first flow blocking element 6 reduces the flow rate of the air and further buffers the fluctuation of the air pressure.

Referring to fig. 4, the first spoiler 6 includes a plurality of sheets 61 that surround the outlet 24 at intervals. The sheet-like member 61 may be planar or curved. In this case, one end of the sheet body 61 close to the partition plate 22 may be spaced apart from the partition plate 22, and as shown in fig. 3, the air flow may reach the air outlet 24 through the gap between the sheet body 61 and the partition plate 22 and the gap between two adjacent sheet bodies 61; alternatively, the sheet-like bodies 61 may extend to the partition plate 22, and only a gap between two adjacent sheet-like bodies 61 may be left on the path from the through hole 220 to the air outlet 24.

Alternatively, the first flow resisting element 6 is annular as a whole and is arranged around the air outlet 24, see fig. 5. In this case, the end surface of the first spoiler 6 facing the partition plate 22 may be disposed to be flat and spaced apart from the partition plate 22, or the end surface of the first spoiler 6 facing the partition plate 22 may be directly formed in a wavy shape, and may or may not contact the partition plate 22, so that the air flow from the through hole 220 reaches the air outlet 24 only through the gap between the first spoiler 6 and the partition plate 22, and the air flow can be effectively buffered, and the fluctuation of the air pressure can be reduced, so that the air can be smoothly discharged through the air outlet 24. Of course, the first flow blocking element 6 may also have more arrangement modes, and any scheme that can make the flow path between the through hole 220 and the air outlet 24 complicated may be applied on the basis of ensuring the flow path between the through hole 220 and the air outlet 24, and will not be described again.

Referring to fig. 6 and 7, in one embodiment, the air pump 100 further includes a second flow blocking member 7 disposed on the first flow blocking member 6 and corresponding to the air outlet 24, for further reducing the flow rate of the air and buffering the fluctuation of the air pressure after the air flow bypasses the first flow blocking member 6 and before reaching the air outlet 24.

In the present exemplary embodiment, the second spoiler 7 is arranged inside the first spoiler 6, i.e. between the opposing side faces of the plurality of flaps 61 or inside the annular first spoiler 6. The second flow resistance 7 may be arranged opposite the air outlet 24, so that the air flow does not flow directly to the air outlet 24.

Specifically, referring to fig. 7, the second choke element 7 includes a bottom wall 71 and a side wall 72 connected to a periphery of the bottom wall 71 in a bent manner, a groove 70 having an opening is formed between the bottom wall 71 and the side wall 72, and at least one air hole 720 is formed in the side wall 72. The bottom wall 71 of the second spoiler 7 is arranged facing the air outlet 24 with a certain clearance from the air outlet 24, and the side wall 72 is arranged close to the first spoiler 6 with a certain clearance from the first spoiler 6, whereby the opening of the recess 70 is formed in a direction towards the partition plate 22. After bypassing the first flow blocking element 6, the airflow (indicated by the dashed arrow in fig. 7 as the flow direction of the gas) enters from the opening of the groove 70, is blocked by the bottom wall 71, changes direction, flows out from the air hole 720 of the side wall 72, is blocked by the first flow blocking element 6, continues to move along the side wall 72 toward the air outlet 24, then converges between the bottom wall 71 and the air outlet 24, and finally is discharged from the air outlet 24. The second flow-blocking piece 7 is arranged so that the air flow is blocked there a plurality of times and the flow direction is changed a corresponding plurality of times, and finally can smoothly flow out of the air outlet 24.

The number and size of the air holes 720 are set according to specific needs. The smaller the number of air holes 720 and the smaller the size, the more significant the blocking effect on the air flow. For example, the number of air holes 720 may be two, three, or more. Furthermore, the plurality of air holes 720 are distributed uniformly over the second flow-blocking part 7, so that the gas can flow out of the second flow-blocking part 7 in a uniform manner and can be collected at the air outlet 24 in a uniform manner.

Of course, the second flow element 7 should be mounted in such a way that a certain clearance is still maintained between it and the air outlet 24, rather than directly blocking at the position of the air outlet 24, and also in such a way that a certain clearance is maintained between its air holes 720 and the first flow element 6.

As shown in fig. 7, in one embodiment, the size of the end of the second flow blocking member 7 far from the air outlet 24 is larger than the size of the end of the second flow blocking member 7 near the air outlet 24, that is, the outer diameter of the side wall 72 of the second flow blocking member 7 at the end far from the air outlet 24 is larger than the diameter of the bottom wall 71, so that the end of the second flow blocking member 7 with the larger outer diameter can be simply pressed and installed inside the end of the first flow blocking member 6 far from the air outlet 24 by means of interference fit, and the gaps between the bottom wall 71 and the air outlet 24 and between the air holes 720 and the first flow blocking member 6 are easily ensured to facilitate the passage of air.

Further, referring to fig. 7, since the outer diameter of the end of the second flow blocking member 7 away from the air outlet 24 is larger, which is equivalent to forming a step structure 73, for this reason, the inner diameter of the first flow blocking member 6 at the side close to the partition plate 22 is larger than the inner diameter at the side close to the air outlet 24, so that a matching structure 62 similar to the step structure 73 is formed on the inner surface of the first flow blocking member 6, and the matching structure 62 is stepped. Therefore, the step structure 73 of the end of the second spoiler 7 remote from the air outlet 24 can abut against this mating structure 62. This has the advantage that since the bottom wall 71 blocks the gas flow during the gas flow, which in turn generates a force that pushes the bottom wall 71 towards the gas outlet 24, the end of the second flow-obstructing element 7 remote from the gas outlet 24 is fitted on the fitting structure 62 of the first flow-obstructing element 6 in this embodiment, which prevents the bottom wall 71 and thus the gas outlet 24 from being blocked.

Preferably, the height of the engagement structure 62 of the first blocking element 6 is smaller than the height of the step structure 73 of the second blocking element 7, i.e. the difference between the inner diameters of the first blocking element 6 is smaller than the difference between the outer diameters of the outer surfaces of the second blocking element 7, so that the first blocking element 6 and the second blocking element 7 can be abutted and pressed at the side close to the partition plate 22, and the gap between the air hole 720 and the first blocking element 6 can be ensured.

In a preferred embodiment, the second flow-blocking part 7 is made of an elastic material, which has the advantage of facilitating the assembly between the second flow-blocking part 7 and the first flow-blocking part 6, i.e. the second flow-blocking part 7 can be easily inserted into the first flow-blocking part 6 after being deformed and can be pressed against the first flow-blocking part 6 by its own elasticity, without any other fixing means, and the second flow-blocking part 7 is not easily separated from the first flow-blocking part 6 during the use of the air pump 100, which is simpler and more reliable in fitting manner. In a specific application, the second flow resisting element 7 may be a rubber material, and further may be a silicone material.

Referring to fig. 8, the embodiment of the present invention further provides an electronic sphygmomanometer 200, including the air pump 100, the air bag 9 and the air tube 8 connected between the air pump 100 and the air bag 9, wherein the air pump 100 pumps air into the air bag 9 through the air outlet 24 and the air tube 8, and the air bag 9 is attached to an arm, a wrist, etc. of a human body for detecting blood pressure of the human body. According to the above, the air pump 100 can discharge the air flow from the air outlet 24 more smoothly during the inflation process, and thus, it is possible to ensure a smooth rise in the pressure inside the air bag 9, to ensure the accuracy of the measured pulse signal, and to ensure the accuracy of the measurement result.

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 motor disposed outside the housing and proximate the second end;

the check valve is arranged in the through hole;

2. The air pump of claim 1, wherein a first flow blocking member is provided on an inner wall of the first end to extend toward the partition plate, and the check valve and the air outlet are respectively located at both sides of the first flow blocking member.

3. The air pump of claim 2, wherein the first flow blocking member includes a plurality of platelets mounted at intervals around the air outlet; alternatively, the first and second electrodes may be,

the first flow blocking piece is annular and is arranged around the air outlet.

4. The air pump of claim 3, further comprising a second flow blocking member mounted on the first flow blocking member and disposed in correspondence with the air outlet.

5. The air pump of claim 4, wherein the second flow blocking member includes a bottom wall and a side wall connected to a periphery of the bottom wall, the bottom wall is disposed opposite to the air outlet and maintains a gap with the air outlet, the side wall is disposed adjacent to the first flow blocking member and maintains a gap with the first flow blocking member, and the side wall is provided with at least one air hole.

6. The air pump according to claim 5, wherein a dimension of an end of the second flow blocking member remote from the air outlet is larger than a dimension of an end thereof close to the air outlet, and an end of the second flow blocking member remote from the air outlet is pressed inside the first flow blocking member.

7. The air pump according to claim 6, wherein an inside dimension of the first flow blocking member at an end thereof remote from the air outlet is larger than an inside dimension thereof near the air outlet to form a stepped structure on the first flow blocking member, and an end thereof remote from the air outlet on the second flow blocking member also abuts against the stepped structure.

8. The air pump according to any of claims 4 to 7, characterized in that the second flow-blocking element is an elastic material.

9. The air pump according to any one of claims 1 to 7, wherein the number of the through holes is two, and the two through holes are respectively oppositely provided at positions close to the edges of the partition plate, and the air outlet is provided corresponding to the center of the partition plate; the inner diameter of the air outlet is 0.3-1.0 mm, and the height of the buffer air chamber is 2-50 mm.

10. An electronic blood pressure meter, comprising:

the air pump of any one of claims 1 to 9; and