CN214901305U

CN214901305U - Waterproof MEMS sensor

Info

Publication number: CN214901305U
Application number: CN202121653000.3U
Authority: CN
Inventors: 顾汉玉; 蔡毅; 王宇永
Original assignee: Shenzhen Qunxin Microelectronics Co ltd
Current assignee: Shenzhen Qunxin Microelectronics Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-11-26
Anticipated expiration: 2031-07-20

Abstract

The utility model provides a waterproof MEMS sensor, which comprises a substrate, stitches, a sensor body, a top cover, sound holes, a waterproof dustproof net and a pressing mechanism, wherein four stitches are symmetrically fixed on two sides of the lower surface of the substrate in pairs, the sensor body is fixed in the middle of the upper surface of the substrate, the sensor body is electrically connected with the substrate, the top cover is fixed on the top of the substrate, and the sensor body is positioned in the top cover, the sound hole is arranged in the middle of the top cover, the waterproof and dustproof net is arranged in the middle of the upper surface of the top cover, the pressing mechanism is fixed on the top of the top cover, the utility model is used for fixed waterproof dust screen, the utility model discloses a set up the outside of sound hole on the top cap with the activity of waterproof dust screen and make things convenient for people to change waterproof dust screen, can improve the life of sensor body effectively, the hold-down mechanism of setting can make things convenient for people to change waterproof dust screen.

Description

Waterproof MEMS sensor

Technical Field

The utility model relates to a MEMS sensor technical field especially relates to a waterproof type MEMS sensor.

Background

A Micro-Electro-mechanical system (MEMS) microphone is an electric transducer manufactured by using a Micro-machining technology, and has the characteristics of small volume, good frequency response, low noise and the like, and along with the development of miniaturization and lightness of electronic equipment, an MEMS microphone sensor is more and more widely applied to the equipment;

and traditional MEMS microphone sensor can set up a top cap on its base plate, set up MEMS sensor in it inside, and seted up a sound hole on the top cap, get into sound through the sound hole, and can be at the fixed waterproof dust screen of one side of sound hole in order to reach waterproof dirt-proof effect, it causes the MEMS harm to place water and dust and enter into in the top cap, but the waterproof dust screen on traditional MEMS microphone sensor is fixed on the top cap, its surface can accumulate a large amount of dust after using one end time, thereby cause the jam of waterproof dust screen, thereby make sound can not be fine pass through waterproof dust screen, thereby make the not fine sound of receiving of MEMS microphone sensor, and then the life who has led to the fact the sensor reduces, but its sensor body still is good, very big waste has been caused.

Therefore, it is necessary to provide a new water-proof type MEMS sensor to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a waterproof type MEMS sensor.

The utility model provides a pair of waterproof type MEMS sensor, including base plate, stitch, sensor body, top cap, sound hole, waterproof dust screen and hold-down mechanism, four the stitch is the both sides that two liang of symmetries were fixed at the base plate lower surface, sensor body fixes the middle part at the base plate upper surface, and sensor body and base plate electric connection, the top cap is fixed at the top of base plate, and sensor body is located the inside of top cap, the sound hole is seted up at the middle part at top cap top, waterproof dust screen sets up the middle part at the top cap upper surface, hold-down mechanism fixes the top at the top cap for fixed waterproof dust screen.

Preferably, the pressing mechanism comprises a rotating rod, a pressing ring, a through hole, a screw and a threaded hole, the rotating rod is fixed on one side of the top cover, the pressing ring is rotatably connected to the outer wall of the rotating rod through a circular hole, the through hole is formed in one side, far away from the rotating rod, of the pressing ring, the screw is inserted into the through hole, the threaded hole is formed in the top of the top cover and located under the screw, and the screw is in threaded connection with the threaded hole.

Preferably, a bump is fixed at one end of the pin far away from the substrate.

Preferably, the bottom of the base plate is fixed with support blocks at equal intervals.

Preferably, the supporting block is made of a rubber material.

Preferably, the top of the top cover is positioned at the outer side of the waterproof dustproof net and is fixedly provided with a positioning ring, and the waterproof dustproof net is sleeved with the positioning ring.

Preferably, the top of the top cover is positioned at the bottom of the waterproof and dustproof net at equal intervals and provided with anti-skid grains.

Preferably, the inner wall of the positioning ring is provided with a chamfer.

Compared with the prior art, the utility model provides a waterproof type MEMS sensor has following beneficial effect:

1. the utility model has the advantages that the waterproof and dustproof net is movably arranged outside the sound hole on the top cover, so that people can conveniently replace the waterproof and dustproof net, and the service life of the sensor body can be effectively prolonged;

2. the utility model discloses a hold-down mechanism who sets up can compress tightly waterproof dust screen at the top of top cap to make waterproof dust screen can reach waterproof dirt-proof effect effectively, and can make things convenient for people to align and change.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the positioning ring of the present invention;

fig. 4 is a schematic diagram of the through hole position structure of the present invention.

Reference numbers in the figures: 1. a substrate; 2. a stitch; 3. a sensor body; 4. a top cover; 5. a sound hole; 6. a waterproof and dustproof net; 7. a hold-down mechanism; 71. a rotating rod; 72. a compression ring; 73. a through hole; 74. a screw; 75. a threaded hole; 8. a bump; 9. a support block; 10. a positioning ring; 11. and (4) anti-skid lines.

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 merely illustrative of the invention and are not intended to limit the invention.

The following detailed description is provided for the specific embodiments of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides a waterproof MEMS sensor, including a substrate 1, pins 2, a sensor body 3, a top cover 4, a sound hole 5, a waterproof dustproof net 6 and a pressing mechanism 7, four the pins 2 are two pairs of symmetric pins fixed on two sides of the lower surface of the substrate 1, the sensor body 3 is fixed at the middle of the upper surface of the substrate 1, and the sensor body 3 is electrically connected with the substrate 1, the top cover 4 is fixed at the top of the substrate 1, and the sensor body 3 is located inside the top cover 4, the sound hole 5 is arranged at the middle of the top cover 4, the waterproof dustproof net 6 is arranged at the middle of the upper surface of the top cover 4, and the pressing mechanism 7 is fixed at the top of the top cover 4 for fixing the waterproof dustproof net 6.

Referring to fig. 2 and 4, the pressing mechanism 7 includes a rotating rod 71, a pressing ring 72, a through hole 73, a screw 74 and a threaded hole 75, the rotating rod 71 is fixed on one side of the top cover 4, the pressing ring 72 is rotatably connected to the outer wall of the rotating rod 71 through a circular hole, the through hole 73 is formed on one side of the pressing ring 72 away from the rotating rod 71, the screw 74 is inserted into the through hole 73, the threaded hole 75 is formed on the top of the top cover 4 and is located right below the screw 74, and the screw 74 is in threaded connection with the threaded hole 75.

It should be noted that the waterproof and dustproof net 6 can be compressed at the top of the top cover 4 through the arranged compressing mechanism 7, so that the waterproof and dustproof net 6 can effectively achieve the waterproof and dustproof effect, and meanwhile, people can conveniently align and replace the waterproof and dustproof net.

Referring to fig. 1, a bump 8 is fixed at an end of the pin 2 away from the substrate 1, so that the connection strength between the pin 2 and the solder can be improved during soldering.

Referring to fig. 1, the bottom of the substrate 1 is equidistantly fixed with supporting blocks 9, and the supporting blocks 9 are made of rubber, so that the weight of the entire substrate 1 can be prevented from being borne by the pins 2, and the pins 2 can be protected to a certain extent.

Referring to fig. 2 and 3, a positioning ring 10 is fixed on the top of the top cover 4 and located outside the waterproof and dustproof net 6, the waterproof and dustproof net 6 is sleeved with the positioning ring 10, and a chamfer is formed on the inner wall of the positioning ring 10 to facilitate positioning of the waterproof and dustproof net 6, so that people can install the waterproof and dustproof net 6 conveniently.

Referring to fig. 2, the top of the top cover 4 is equidistantly provided with anti-slip lines 11 at the bottom of the waterproof and dustproof net 6, so that the firmness of installing the waterproof and dustproof net 6 can be improved.

The utility model provides a waterproof type MEMS sensor's theory of operation as follows:

during the use, through placing into holding ring 10 waterproof dustproof net 6 in, thereby cover the phonate hole 5 through waterproof dustproof net 6, and place and pass through the rotation clamp ring 72 after getting into, make clamp ring 72 press waterproof dustproof net 6 on top cap 4, and then insert screw 74 in through-hole 73, rotate screw 74 simultaneously, make screw 74 rotate into screw hole 75 in, finally screw up screw 74, thereby screw up clamp ring 72, compress tightly waterproof dustproof net 6 simultaneously, thereby carry out waterproof dustproof work through waterproof dustproof net 6, the utility model discloses a set waterproof dustproof net 6 and top cap 4 into the form of split, thereby make waterproof dustproof net 6 can change, thereby very big improvement sensor body 3's life, and the hold-down mechanism 7 of setting can make things convenient for people to change waterproof dustproof net 6.

The utility model discloses circuit and control that relate to are prior art, do not carry out too much repetition here.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A water-resistant MEMS sensor, comprising:

a substrate (1);

the four pins (2) are symmetrically fixed on two sides of the lower surface of the substrate (1) in pairs;

the sensor body (3) is fixed in the middle of the upper surface of the substrate (1), and the sensor body (3) is electrically connected with the substrate (1);

the top cover (4), the top cover (4) is fixed on the top of the substrate (1), and the sensor body (3) is positioned inside the top cover (4);

the sound hole (5), the sound hole (5) is arranged in the middle of the top cover (4);

the waterproof and dustproof net (6), the waterproof and dustproof net (6) is arranged in the middle of the upper surface of the top cover (4);

and the pressing mechanism (7) is fixed at the top of the top cover (4) and used for fixing the waterproof and dustproof net (6).

2. The waterproof type MEMS sensor according to claim 1, characterized in that said pressing mechanism (7) comprises:

the rotating rod (71), the rotating rod (71) is fixed on one side of the top cover (4);

the compression ring (72) is rotatably connected to the outer wall of the rotating rod (71) through a circular hole;

the through hole (73), the through hole (73) is arranged on one side of the pressing ring (72) far away from the rotating rod (71);

the screw (74) is inserted into the through hole (73);

the screw hole (75), screw hole (75) are seted up and are located screw (74) at the top of top cap (4) under, and screw (74) and screw hole (75) threaded connection.

3. The waterproof MEMS sensor according to claim 1, wherein the pins (2) are fixed with bumps (8) at the end away from the substrate (1).

4. The waterproof MEMS sensor according to claim 1, characterized in that support blocks (9) are fixed to the bottom of the substrate (1) at equal distances.

5. The waterproof MEMS sensor according to claim 4, wherein the support block (9) is made of rubber.

6. The waterproof MEMS sensor according to claim 1, wherein a positioning ring (10) is fixed on the top of the top cover (4) outside the waterproof and dustproof net (6), and the waterproof and dustproof net (6) is sleeved with the positioning ring (10).

7. The waterproof MEMS sensor according to claim 6, wherein the top of the top cover (4) is provided with anti-slip lines (11) at equal intervals at the bottom of the waterproof and dustproof net (6).

8. The waterproof MEMS sensor according to claim 6, wherein the inner wall of the positioning ring (10) is chamfered.