Transmission mechanism for micro air pump and micro air pump

Abstract

The utility model aims to solve the main technical problem that an air bag falls off. The transmission mechanism for the micro air pump comprises a micro air pump body, and a motor, an eccentric wheel, a steel shaft, a swing frame and an air bag which are arranged in the micro air pump body, the eccentric wheel is connected to a rotating shaft of the motor, the two ends of the steel shaft are connected with the eccentric wheel and the swing frame respectively, and the swing frame and the air bag are assembled. No air channel is arranged between the swing frame and the air bag. The swing frame comprises a placement hole, and a pull buckle device is arranged at the tail end of the air bag; the pull buckle device is connected with the placement hole in a buckling manner; the utility model further provides a miniature air pump which comprises the transmission mechanism, and an air inlet and an air outlet are formed in an upper cover of the miniature air pump. An air cavity connected with the air inlet and the air outlet is formed in the upper cover.

Description

Technical Field

[0001] The utility model relates to a micro air pump, in particular to a transmission mechanism for the micro air pump and the micro air pump. Background Art

[0002] A micro air pump is a gas delivery device with a small size and a gaseous working medium. It is mainly used for gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintenance, air extraction, air pumping, pressurization, etc., especially in the application field of electric water flossers. Electric water flossers usually use micro air pumps to produce efficient turbine suction effects to improve the flushing effect. The micro air pump can generate a large airflow through high-speed rotation, so that the water flosser can absorb more oral residues and impurities and flush them out of the gum gap, thereby keeping the mouth clean and healthy.

[0003] The transmission mechanism of the current micro air pump includes a motor, an eccentric wheel, a steel shaft, a swing frame and an air bag. The principle is that after the motor is powered on, it rotates through the output shaft, driving the eccentric wheel to rotate, and the steel shaft installed on the eccentric wheel rotates accordingly. In this way, the steel shaft can allow the swing frame to drive the air bag to change its volume, thereby realizing the functions of pumping and inflating.

[0004] In the current transmission mechanism, the airbag and the swing frame are assembled together and are tightly matched in size. When the air outlet and the air inlet of the micro air pump are arranged at the same end, when water vapor enters the airbag or the air inlet is accidentally blocked, the airbag is easily blocked and the swing frame will separate from the airbag downward, causing the airbag to fall off and affecting the performance of the air pump. Utility Model Content

[0005] The main technical problem to be solved by the utility model is the problem of airbag falling off, so a transmission mechanism for a micro air pump and a micro air pump are provided.

[0006] In order to solve the above technical problems, the utility model provides a transmission mechanism for a micro air pump, including a micro air pump body and a motor, an eccentric wheel, a steel shaft, a swing frame and an air bag arranged in the micro air pump body;

[0007] The eccentric wheel is connected to the rotating shaft of the motor, and the two ends of the steel shaft are respectively connected to the eccentric wheel and the swing frame, and the swing frame is assembled with the airbag; there is no air path between the swing frame and the airbag;

[0008] The swing frame comprises a placement hole, and a buckle device is arranged at the end of the airbag; the buckle device forms a snap connection with the placement hole.

[0009] In a preferred embodiment, the swing frame is provided with a groove connected to the placement hole, and the inner diameter of the groove is larger than the placement hole;

[0010] The buckle device is provided with a protrusion, and the buckle device is inserted into the placement hole. The protrusion is placed in the groove, and the end surface of the protrusion is against the inner edge of the placement hole to form a buckle connection.

[0011] In a preferred embodiment, the protrusion is in an inverted cone shape along the insertion direction.

[0012] In a preferred embodiment, the maximum diameter of the protrusion is larger than the placement hole, and the protrusion is provided with an introduction slope along the insertion direction.

[0013] In a preferred embodiment, the end of the buckle device is a plane.

[0014] In a preferred embodiment, the end of the buckle device is provided with an introduction angle for introducing into the placement hole.

[0015] In a preferred embodiment, the introduction angle and the end of the fastener device are weakly connected; the weak connection is that the introduction angle can be separated from the end of the fastener device when an external force is applied.

[0016] In a preferred embodiment, the fastener device is made of rubber or chloroprene rubber.

[0017] The utility model also provides a micro air pump, comprising the transmission mechanism for the micro air pump, wherein an air inlet and an air outlet are arranged on the upper cover of the micro air pump; an air cavity connecting the air inlet and the air outlet is formed in the upper cover.

[0018] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0019] By improving the connection structure between the micro air pump swing frame and the airbag, retaining the propulsion part of the micro air pump eccentric wheel, only adding a mounting hole to the original structure of the swing frame, and adding a buckle device at the end of the airbag, the connection between the swing frame and the airbag is made more stable. While the airbag retains the original high-pressure and high-flow performance, the separation between the airbag and the swing frame is avoided, making the drive more stable, reducing the air pump noise, and extending the service life of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the connection between the air bag and the swing frame in the micro air pump in the prior art;

[0021] Figure 2 It is an exploded view of the connection between the air bag and the swing frame in the micro air pump in the prior art;

[0022] Figure 3 This is an exploded view of a micro air pump in a preferred embodiment of the utility model;

[0023] Figure 4This is a schematic diagram of the structure of the swing frame in the preferred embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the airbag in the preferred embodiment of the utility model;

[0025] Figure 6 This is a cross-sectional view of the connection of the micro air pump in the preferred embodiment of the utility model.

[0026] Explanation of the reference numerals: 1. Micro air pump body; 2. Steel shaft; 3. Swing frame; 31. Mounting hole; 32. Groove; 4. Air bag; 41. Buckle device; 42. Protrusion; 43. Introduction slope; 44. Introduction angle; 5. Upper cover; 6. Air inlet; 7. Air outlet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0030] like Figure 1-2In the existing micro air pump, the airbag 101 is connected to the output shaft of the motor through an eccentric structure. When the motor is working, the end of the airbag 101 is pulled up and down by the eccentric structure, thereby stretching or compressing the airbag 101 to make it inhale or exhaust air. The eccentric structure includes a swing frame 102, which is used to connect with the airbag 101. The swing frame 102 is provided with a protrusion 103. The end of the airbag 101 is provided with a sleeve 104, and then the sleeve 104 is used to cover the protrusion 103 to form a connection. Since the airbag 101 is rubber and has a certain deformation, the sleeve 104 can be expanded to cover the protrusion 103 and fixed by elasticity and friction.

[0031] However, with this tight connection, when water vapor enters the airbag 101 or the air inlet is accidentally blocked, the airbag 101 is suffocated and the swing frame 102 cannot drive the airbag 101 downward, which can easily cause the airbag 101 to fall off relative to the swing frame, thereby affecting the performance of the air pump.

[0032] refer to Figure 3-Figure 6 This embodiment provides a transmission mechanism for a micro air pump, which is mainly used to solve the problem that the airbag 4 is suffocated and the airbag 4 is easily detached from the swing frame 3 as mentioned above.

[0033] The transmission mechanism provided in this embodiment is mainly used for a micro air pump, and is mainly for a micro air pump in which the air inlet 6 and the air outlet 7 are simultaneously arranged on the upper cover 5. An air cavity connecting the air inlet 6 and the air outlet 7 is formed in the upper cover 5, and a U-shaped air path is formed. When air is being taken in and out, it is very easy for water vapor to enter the airbag 4 or for the air inlet 6 to be accidentally blocked.

[0034] Therefore, this embodiment is a transmission mechanism set for a micro air pump of this structure, including a micro air pump body 1 and a motor, an eccentric wheel, a steel shaft 2, a swing frame 3 and an air bag 4 arranged in the micro air pump body 1; the eccentric wheel is connected to the rotating shaft of the motor, and the two ends of the steel shaft 2 are respectively connected to the eccentric wheel and the swing frame 3, and the swing frame 3 is assembled with the air bag 4; there is no air path between the connection between the swing frame 3 and the air bag 4.

[0035] When the motor drives the eccentric wheel to rotate, the eccentric wheel drives the steel shaft 2 to act on the swing frame 3 to move up and down, so that the entire airbag 4 moves up and down along with the connected swing frame 3, thereby reducing and increasing the volume of the airbag 4 cavity, and the airbag 4 is evacuated and exhausted. When the volume of the airbag 4 cavity increases, the air inlet 6 opens to allow gas to enter and exit the airbag 4 cavity. When the volume of the airbag 4 cavity is compressed, the gas in the airbag 4 cavity goes out from the air outlet 7.

[0036] The swing frame 3 includes a placement hole 31, and a buckle device 41 is provided at the end of the airbag 4; the buckle device 41 forms a snap connection with the placement hole 31. In this embodiment, the swing frame 3 and the eccentric propulsion part of the eccentric wheel are retained, the buckle device 41 is added to the end of the airbag 4, and the structure of the placement hole 31 is added to the original structure of the swing frame 3. The buckle connection between the placement hole 31 and the buckle device 41 is used to achieve a fixed connection between the airbag 4 and the swing frame 3, so that the air pump retains the original high-pressure and high-flow performance, while preventing the airbag 4 from falling off from the deflection block, reducing the noise of the air pump, and extending the service life of the air pump.

[0037] Among them, the swing frame 3 is provided with a groove 32 connected to the placement hole 31, and the inner diameter of the groove 32 is larger than the placement hole 31; the buckle device 41 is provided with a protrusion 42, the buckle device 41 is inserted into the placement hole 31, the protrusion 42 is placed in the groove 32, and the end face of the protrusion 42 is against the inner edge of the placement hole 31 to form a snap connection.

[0038] The buckle device 41 is made of rubber or chloroprene rubber, has a certain degree of deformation, and can be squeezed through the placement hole 31 by force, so that its protrusion 42 passes through the placement hole 31 and is placed in the groove 32, and the end face of the protrusion 42 is snap-fitted with the inner edge of the placement hole 31.

[0039] The maximum diameter of the protrusion 42 is larger than the placement hole 31 , and the protrusion 42 is provided with an introduction slope 43 along the insertion direction, and the protrusion 42 is in an inverted cone shape along the insertion direction, so as to facilitate passing through the placement hole 31 .

[0040] An introduction angle 44 is provided at the end of the buckle device 41 for introducing into the placement hole 31 . The introduction angle 44 facilitates the buckle device 41 to be inserted into the placement hole 31 , and the introduction angle 44 shell is convenient for holding by hand and passing the buckle device 41 through the placement hole 31 from the groove 32 .

[0041] The lead-in angle 44 and the end of the buckle device 41 are weakly connected; the weak connection means that the lead-in angle 44 can be separated from the end of the buckle device 41 when an external force is applied, and the end of the buckle device 41 after separation is a plane. After the buckle device 41 passes through the placement hole 31 to form a snap connection, the lead-in angle 44 with the weak connection is removed by external force, so that the end of the buckle device 41 is a plane, which can make room for the swing frame 3 to swing up and down, and avoid the lead-in angle 44 occupying the swing space and causing the swing frame 3 to be unable to move.

[0042] The weak connection structure between the lead-in angle 44 and the end of the buckle device 41 can be opened by setting a seam.

[0043] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A transmission mechanism for a micro air pump, characterized in that: It includes a micro air pump body and a motor, an eccentric wheel, a steel shaft, a swing frame and an air bag arranged in the micro air pump body; The eccentric wheel is connected to the rotating shaft of the motor, and the two ends of the steel shaft are respectively connected to the eccentric wheel and the swing frame, and the swing frame is assembled with the airbag; there is no air path between the swing frame and the airbag; The swing frame comprises a placement hole, and a buckle device is arranged at the end of the airbag; the buckle device forms a snap connection with the placement hole.

2. A transmission mechanism for a micro air pump according to claim 1, characterized in that: The swing frame is provided with a groove connected to the placement hole, and the inner diameter of the groove is larger than the placement hole; The buckle device is provided with a protrusion, and the buckle device is inserted into the placement hole. The protrusion is placed in the groove, and the end surface of the protrusion is against the inner edge of the placement hole to form a buckle connection.

3. A transmission mechanism for a micro air pump according to claim 2, characterized in that: The protrusion is in an inverted cone shape along the clamping direction.

4. A transmission mechanism for a micro air pump according to claim 3, characterized in that: The maximum diameter of the protrusion is larger than the placement hole, and the protrusion is provided with an introduction slope along the insertion direction.

5. The transmission mechanism for a micro air pump according to claim 1, characterized in that: The end of the buckle device is a plane.

6. The transmission mechanism for a micro air pump according to claim 1, characterized in that: The end of the buckle device is provided with an introduction angle for introducing into the placement hole.

7. A transmission mechanism for a micro air pump according to claim 6, characterized in that: The introduction angle and the end of the buckle device are weakly connected; the weak connection means that the introduction angle can be separated from the end of the buckle device when an external force is applied.

8. A transmission mechanism for a micro air pump according to any one of claims 1 to 7, characterized in that: The buckle device is made of rubber or chloroprene rubber.

9. A micro air pump, characterized in that: A transmission mechanism for a micro air pump comprising any one of claims 1-8, wherein an air inlet and an air outlet are arranged on the upper cover of the micro air pump; an air cavity connecting the air inlet and the air outlet is formed in the upper cover.

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