CN210015811U

CN210015811U - Metal dome ventilation structure

Info

Publication number: CN210015811U
Application number: CN201920721547.9U
Authority: CN
Inventors: 刘峰
Original assignee: Shenzhen Jinhuankang Industry Co Ltd
Current assignee: Shenzhen Jinhuankang Industry Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-02-04
Anticipated expiration: 2029-05-21

Abstract

The utility model discloses a belong to metal dome technical field, specifically be a metal dome ventilation structure, including PCB board and the metal dome piece of connection at PCB board upper surface, the outer wall top edge contact of metal dome piece has the rubber circle, the upper surface of rubber circle has evenly seted up the air vent, the outward flange of rubber circle lower surface bonds and has first support ring, and the bottom of first support ring bonds with the upper surface of PCB board, the inward flange of rubber circle upper surface bonds and has the second support ring, the lower part of second support ring outer wall evenly bonds and has the separation blade that corresponds with the air vent position, the inner chamber of second support ring transversely pegs graft and has ventilative structure, and the upper surface contact of the lower surface of ventilative structure and metal dome piece, ventilative structure includes first ventilative board, first bleeder vent has evenly been seted up to the body of first ventilative board, and this device has better water-proof measure to the metal dome piece, simultaneously, the air permeability is considered.

Description

Metal dome ventilation structure

Technical Field

The utility model relates to a metal dome technical field specifically is a metal dome ventilation structure.

Background

The snap dome is used as a part between the connecting key and the induction electrode on the PCB board, is widely applied to various electric appliances in life, has the characteristics of long service life and low cost, and is improved all the time.

For example, the Chinese utility model with application number of CN201620759716.4 is a venting structure of a metal dome. The metal dome ventilation structure comprises a metal dome, wherein the metal dome comprises key contacts, and the metal dome further comprises ventilation through holes which are arranged between the key contacts. The utility model is provided with a ventilation through hole on the snap dome.

However, the existing improvement mode has the problems that no good waterproof measure is provided for the snap dome and the air permeability is not good enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a metal dome piece ventilation structure to solve the problem that does not have better water-proof measure to the metal dome piece that proposes among the above-mentioned background art, and the gas permeability is not good enough.

In order to achieve the above object, the utility model provides a following technical scheme: a metal dome ventilation structure comprises a PCB and a metal dome connected to the upper surface of the PCB, wherein a rubber ring is contacted with the upper edge of the outer wall of the metal dome, vent holes are uniformly formed in the upper surface of the rubber ring, a first support ring is bonded to the outer edge of the lower surface of the rubber ring, the bottom of the first support ring is bonded to the upper surface of the PCB, a second support ring is bonded to the inner edge of the upper surface of the rubber ring, a blocking piece corresponding to the vent holes is uniformly bonded to the lower portion of the outer wall of the second support ring, a ventilation structure is transversely inserted into the inner cavity of the second support ring, the lower surface of the ventilation structure is contacted with the upper surface of the metal dome, the ventilation structure comprises a first ventilation plate, first vent holes are uniformly formed in the body of the first ventilation plate, a ventilation cotton sheet is bonded to the lower surface of the first ventilation plate, a second ventilation plate is bonded to the lower portion of the ventilation cotton sheet, and a second air hole corresponding to the first air hole is formed in the body of the second air permeable plate.

Preferably, the distance value between the lower surface of the baffle plate and the upper surface of the rubber ring is 1 mm.

Preferably, the PCB board is provided with heat dissipation holes, and the heat dissipation holes surround the snap dome.

Preferably, the first air hole is a first air hole forming an included angle of 60 degrees with the horizontal plane, and the second air hole and the first air hole are symmetrical about the breathable cotton piece.

Preferably, the upper surface of the second support ring is 1mm higher than the upper surface of the air-permeable structure.

Preferably, the upper surface of one end of the baffle plate, which is far away from the second support ring, is of an arc structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the ventilation structure, the baffle plate and the rubber ring are matched to prevent water from splashing, and a certain waterproof effect can be provided for the metal dome sheet;

2) the texture of the surfaces of the first vent hole and the first vent hole provides good touch feeling for fingers;

3) the ventilation structure and the vent holes provide good ventilation for the metal dome sheet.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

FIG. 3 is a sectional view of the ventilation structure of the present invention;

fig. 4 is a top view of the present invention.

In the figure: the air-permeable structure comprises a PCB (printed circuit board) 1, metal dome sheets 2, a rubber ring 3, vent holes 4, a first support ring 5, a second support ring 6, a blocking sheet 7, an air-permeable structure 8, a first air-permeable plate 81, a first air-permeable hole 82, an air-permeable cotton sheet 83, a second air-permeable plate 84, a second air-permeable hole 85 and heat dissipation holes 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 and simplicity of description, and do not indicate or imply that the device or element being 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.

Example (b):

referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a metal dome ventilation structure, includes PCB board 1 and the metal dome 2 of connection at PCB board 1 upper surface, the induction electrode electric connection that corresponds on metal dome 2 and the PCB board 1, switch-on induction circuit when metal dome 2 is pressed, circuit disconnection after metal dome 2 bounces.

The upper edge of the outer wall of the metal dome 2 is contacted with a rubber ring 3, the rubber ring 3 can move up and down along the outer wall of the metal dome 2, vent holes 4 are uniformly formed in the upper surface of the rubber ring 3, a first supporting ring 5 is bonded to the outer edge of the lower surface of the rubber ring 3, the first supporting ring 5 is made of polycarbonate, the rubber ring is light in weight and has certain hardness, the bottom of the first supporting ring 5 is bonded with the upper surface of the PCB 1, the first supporting ring 5 supports the outer edge of the rubber ring 3, a second supporting ring 6 is bonded to the inner edge of the upper surface of the rubber ring 3, the second supporting ring 6 is made of polycarbonate, a blocking piece 7 corresponding to the vent hole 4 is uniformly bonded to the lower portion of the outer wall of the second supporting ring 6, a ventilation structure 8 is transversely inserted into an inner cavity of the second supporting ring 6, the lower surface of the ventilation structure 8 is contacted with the upper surface of the metal dome 2, the ventilation structure 8 comprises a first ventilation, first air holes 82 are uniformly formed in the body of the first air permeable plate 81, an air permeable cotton sheet 83 is bonded to the lower surface of the first air permeable plate 81, a second air permeable plate 84 is bonded to the lower portion of the air permeable cotton sheet 83, and second air holes 85 corresponding to the first air holes 82 are formed in the body of the second air permeable plate 84.

Wherein, the distance value between the lower surface of the baffle 7 and the upper surface of the rubber ring 3 is 1mm, and the baffle 7 can not block the vent hole 4 from air while shielding water from splashing.

The PCB board 1 is provided with heat dissipation holes 9, and the heat dissipation holes 9 surround the metal dome 2 to assist in providing heat dissipation for the metal dome 2.

The first air holes 82 are formed at an included angle of 60 degrees with the horizontal plane, the second air holes 85 and the first air holes 82 are symmetrical about the breathable cotton piece 83, and the breathable cotton piece 83 is matched to provide heat dissipation for the metal dome 2 and prevent water splashing.

The upper surface of the second support ring 6 is 1mm higher than the upper surface of the permeable structure 8 so that the second support ring 6 is first pressed down before the snap dome 2 is pressed by a finger.

The upper surface of one end of the blocking piece 7, which is far away from the second support ring 6, is of an arc structure, so that fingers cannot be pressed against the blocking piece 7 when touching the blocking piece carelessly.

The working principle is as follows: electrically connecting the metal dome 2 with an induction electrode on the PCB 1, adhering a first support ring 5 on the upper surface of the PCB 1 by taking the metal dome 2 as a circle center, adhering a second support ring 6 on the outer edge of the top of the rubber ring 3, adhering the outer edge of the bottom of the rubber ring 3 on the first support ring 5, transversely adhering a ventilation structure 8 in an inner cavity of the second support ring 6, contacting the lower surface of the ventilation structure 8 with the metal dome 2, firstly contacting the second support ring 6 when the metal dome 2 is pressed by fingers, pressing the inner edge of the rubber ring 3 inwards during the pressing process of the second support ring 6, discharging air between the first support ring 5 and the metal dome 2 through an air vent 4, simultaneously expanding the upper part of the second support ring 6 outwards, moving the lower part of the second support ring 2 downwards by adhering to the metal dome 2, moving one end, far away from the second support ring 6, of a separation blade 7 adhered to the outer wall upwards relative to the joint of the second support ring 6, avoid sheltering from air vent 4 and giving vent to anger, the back is bounced again to

metal dome

2, 3 inward flanges of rubber circle can resume former shape, this process has gaseous entering again between first support ring 5 and the metal dome 2, just accomplished the heat dissipation of metal dome 2 gas exchange mode when pressing metal dome 2 like this, ventilative structure 8 and louvre 9 also can assist and dispel the heat, when water splashes the top, the drop of water that splashes directly over metal dome 2 can produce certain loss through first bleeder vent 82 on first breather plate 81 downflow, then absorbed by ventilative cotton piece 83, second bleeder vent 85 ensures that the remaining small water droplet after ventilative cotton piece 83 absorbs can not flow on metal dome 2, separation blade 7 can lead the water to drip outside first support bad 5.

Having shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a metal dome piece ventilation structure, includes PCB board (1) and connects metal dome piece (2) at PCB board (1) upper surface, its characterized in that: the upper edge of the outer wall of the metal dome sheet (2) is contacted with a rubber ring (3), vent holes (4) are uniformly formed in the upper surface of the rubber ring (3), a first supporting ring (5) is bonded to the outer edge of the lower surface of the rubber ring (3), the bottom of the first supporting ring (5) is bonded to the upper surface of the PCB (1), a second supporting ring (6) is bonded to the inner edge of the upper surface of the rubber ring (3), a blocking piece (7) corresponding to the vent holes (4) is uniformly bonded to the lower portion of the outer wall of the second supporting ring (6), a ventilation structure (8) is transversely inserted into an inner cavity of the second supporting ring (6), the lower surface of the ventilation structure (8) is contacted with the upper surface of the metal dome sheet (2), the ventilation structure (8) comprises a first ventilation plate (81), a first ventilation hole (82) is uniformly formed in the body of the first ventilation plate (81), the lower surface of the first breathable plate (81) is adhered with a breathable cotton sheet (83), the lower part of the breathable cotton sheet (83) is adhered with a second breathable plate (84), and a body of the second breathable plate (84) is provided with a second breathable hole (85) corresponding to the first breathable hole (82).

2. The metal dome sheet venting structure of claim 1, wherein: the distance value between the lower surface of the baffle plate (7) and the upper surface of the rubber ring (3) is 1 mm.

3. The metal dome sheet venting structure of claim 1, wherein: the PCB (1) is provided with heat dissipation holes (9), and the heat dissipation holes (9) surround the snap dome (2).

4. The metal dome sheet venting structure of claim 1, wherein: the first air hole (82) is a first air hole forming an included angle of 60 degrees with the horizontal plane, and the second air hole (85) and the first air hole (82) are symmetrical about the air-permeable cotton piece (83).

5. The metal dome sheet venting structure of claim 1, wherein: the upper surface of the second support ring (6) is 1mm higher than the upper surface of the air-permeable structure (8).

6. The metal dome sheet venting structure of claim 1, wherein: the upper surface of one end of the baffle plate (7) far away from the second support ring (6) is of an arc structure.