CN211719461U

CN211719461U - Airtight seal structure of sealing switch who contains mold insert

Info

Publication number: CN211719461U
Application number: CN202020009713.5U
Authority: CN
Inventors: 张艳; 高晶晶; 贺独醒; 王宸
Original assignee: Shanghai Aviation Electric Co Ltd
Current assignee: Shanghai Aviation Electric Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-10-20
Anticipated expiration: 2030-01-03

Abstract

The utility model discloses an airtight structure who contains sealed switch of mold insert includes, goes up casing, lower casing and mold insert, the coefficient of expansion of casing is greater than down the coefficient of expansion of mold insert, the bottom surface of casing is formed with the holding blind hole down, the mold insert arrange in the inside of holding blind hole, be formed with on the outer peripheral face of mold insert last sealed annular and arrange in go up the lower sealed annular of sealed annular below, go up sealed annular reaches the opening orientation of sealed annular down the internal perisporium of holding blind hole, be formed with on the internal perisporium of holding blind hole and extend to go up the inside last sealed convex part of sealed annular and extend to the inside lower sealed convex part of sealed annular down. The beneficial effects of the utility model reside in that: the sealing performance between the lower shell and the insert is ensured.

Description

Airtight seal structure of sealing switch who contains mold insert

Technical Field

The utility model relates to a sealing switch, especially, an airtight structure of sealing switch who contains mold insert.

Background

Generally, a sealing switch containing an insert has poor sealing performance, and in an area with high humidity, an action system inside the switch is easily affected by water vapor to lose normal functions, so that the use requirement of an aviation product with high sealing performance requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is solved and is contained the not strong problem of the sealed switch leakproofness of mold insert among the prior art, and provides a neotype airtight structure who contains the sealed switch of mold insert.

In order to realize the purpose, the technical scheme of the utility model is as follows: the utility model provides an airtight structure who contains sealed switch of mold insert includes, goes up casing, lower casing and mold insert, the coefficient of expansion of casing is greater than down the coefficient of expansion of mold insert, the bottom surface of casing is formed with the holding blind hole down, the mold insert arrange in the inside of holding blind hole, its characterized in that, be formed with on the outer peripheral face of mold insert last sealed annular and arrange in go up the lower sealed annular of sealed annular below, go up sealed annular and the opening orientation of sealed annular down the internal perisporium of holding blind hole, be formed with on the internal perisporium of holding blind hole and extend to go up the inside last sealed convex part of sealed annular and extend to the inside lower sealed convex part of sealed annular down.

The air-tight sealing structure of the sealing switch with the insert is characterized in that a notch surrounding the outer side of the insert is formed in the bottom surface of the lower shell, the notch and the insert jointly define a sealing groove with a downward opening, and epoxy glue is filled in the sealing groove.

As a preferable scheme of the airtight structure of the insert-containing sealing switch, a sealing gasket is arranged between the upper shell and the lower shell.

The preferable scheme of the air sealing structure of the sealing switch with the insert further comprises a cover plate, a handle, a metal gasket, a sealing bucket and a sealing ring, wherein the metal gasket, the sealing bucket and the sealing ring which surround the periphery of the handle are arranged between the upper shell and the cover plate.

Compared with the prior art, the beneficial effects of the utility model reside in at least: under the condition of high temperature or low temperature, the insert can be tightly attached to the lower shell, so that a good sealing environment is provided for the switch.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a handle according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an insert according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 3, there is shown a hermetic sealing structure of a sealing switch including an insert. The air sealing structure comprises a handle 1, a cover plate 2, a sealing ring 3, a sealing bucket 4, a metal gasket 5, an upper shell 6, a sealing gasket 7, a lower shell 8 and an insert 9. The upper end of the upper shell 6 is connected with the cover plate 2. The handle 1 extends through the upper housing 6 and the cover plate 2 and over the cover plate 2. A metal gasket 5, a sealing bucket 4 and a sealing ring 3 are arranged between the upper shell 6 and the cover plate 2. The sealing ring 3 is in interference fit with the upper shell 6 and the handle 1, so that the sealing performance between the upper shell 6 and the handle 1 is enhanced, and large particles, water and the like are prevented from entering the switch from the top end to influence the normal operation of a contact system and a conversion system inside the switch. A sealing gasket 7 is arranged between the upper shell 6 and the lower shell 8. The sealing gasket 7 is made of silicon rubber, and can elastically deform under the action of external pressure to fill up microscopic pits on the matching surface of the upper shell 6 and the lower shell 8 so as to realize the sealing between the upper shell 6 and the lower shell 8.

The lower shell 8 is made of phenolic plastics, and is injection-molded with the insert 9 through a mold. The insert 9 structure contains 2 spaced apart semi-circular grooves 9a and 9 b. Under the environment of a large temperature change range, the insert 9 can be tightly attached to the lower shell 8, so that a good sealing environment is provided for the switch. When the ambient temperature is high, the expansion coefficient of the material of the lower shell 8 is larger than that of the insert 9, so that the expansion amount of the material of the lower shell 8 is larger than that of the insert 9, and the

parts

9c and 9d of the lower shell 8 are tightly pressed on the upper side of the groove 9a and the lower side of the groove 9b of the insert 9 respectively, so that the switch can keep good sealing performance under high temperature conditions. When the ambient temperature is low, the shrinkage coefficient of the material of the lower shell 8 is larger than that of the insert 9, so that the shrinkage amount of the material of the lower shell 8 is larger than that of the insert 9, and

parts

9c and 9d of the lower shell 8 are tightly attached to the lower side of the groove 9a and the upper side of the groove 9b of the insert 9 respectively, so that the switch can keep good sealing performance under the low-temperature condition. The bottom of the lower shell 8 is provided with a groove e at the matching part with the insert 9, and after the switch is assembled, epoxy glue can be injected into the groove e, so that the sealing property between the lower shell 8 and the insert 9 is further improved.

The above description is only intended to illustrate embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an airtight structure who contains sealed switch of mold insert includes, goes up casing, lower casing and mold insert, the coefficient of expansion of casing is greater than down the coefficient of expansion of mold insert, the bottom surface of casing is formed with the holding blind hole down, the mold insert arrange in the inside of holding blind hole, its characterized in that, be formed with on the outer peripheral face of mold insert last sealed annular and arrange in go up the lower sealed annular of sealed annular below, go up sealed annular and the opening orientation of sealed annular down the internal perisporium of holding blind hole, be formed with on the internal perisporium of holding blind hole and extend to go up the inside last sealed convex part of sealed annular and extend to the inside lower sealed convex part of sealed annular down.

2. The hermetic sealing structure of the insert-containing sealing switch according to claim 1, wherein a bottom surface of the lower housing is formed with a notch surrounding an outer side of the insert, the notch and the insert together define a sealing groove with a downward opening, and an interior of the sealing groove is filled with epoxy glue.

3. The hermetic sealing structure of the insert-containing sealing switch according to claim 1 or 2, wherein a sealing gasket is disposed between the upper housing and the lower housing.

4. The hermetic sealing structure of the insert-containing sealing switch according to claim 1 or 2, further comprising a cover plate, a handle, a metal gasket, a sealing bucket and a sealing ring, wherein the metal gasket, the sealing bucket and the sealing ring are disposed between the upper housing and the cover plate and surround the periphery of the handle.