CN103338608A

CN103338608A - Housing sealing structure

Info

Publication number: CN103338608A
Application number: CN2013102372432A
Authority: CN
Inventors: 周斌欣; 马明明; 成刚; 赵国良; 毛炫辉
Original assignee: YANGZHOU DADE ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: YANGZHOU DADE ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2013-10-02

Abstract

A housing sealing structure relates to the technical field of production technology for designing electronic equipment with higher dust-proof and waterproof performance. The housing sealing structure adopts the structure that an open end of a main housing is connected with an end cover through a pressure piece; a sealing strip is arranged between opposite surfaces of the end cover and the main housing; a ring-shaped concave groove is formed in the side surface, towards the main housing, of the end cover; the sealing strip is limited in the ring-shaped concave groove. According to the invention, the sealing for the interior of the housing is realized through the simple and reliable sealing structure while the dust-proof and water-proof performance is achieved. The sealing structure, especially for electronic products, can dispense with expensive casting process or high-IP-level incoming and outgoing lines connectors, which further reduces the manufacturing cost.

Description

A kind of seal structure for casing

Technical field

The present invention relates to the dustproof and waterproof performance is proposed the design of electronic devices technical field of producing of high requirement.

Background technology

When the sealing problem for the treatment of product, what generally run into is the waterproof problem of shell self, securing members such as the screw on shell 2.Put or the position of electric wire and connector turnover shell all can produce the slit, these slits are the main causes that cause product sealing failure.

Such seal request belongs to the technology category of static seal for most electronic products.

Existing seal means generally has encapsulating in this field, sealing gasket, and sealing ring, and surface cover glue etc.

Wherein process for filling colloid into is deep into casing inside except also needing with gel layer slit surfaces forms cover layer, and is more loaded down with trivial details in production operation.

Need exposed electronic device if having in the casing, also need consider in the encapsulating process, how to dodge this 3.Part; The material of the glue that different application is chosen and operation technique and to expend man-hour also inequality.

Sealing gasket is a kind of material commonly used, and this material is installed simple, low price, but the relative deformation amount is less; Have one 4.Wide compressive plane needs a bigger extruding force to arrive certain deformation, can not play a good sealing effectiveness in the fastening application of general screw; Compare close with sealing gasket 5.Be a better seal method, can realize good sealing effectiveness producing a bigger deformation on the narrower compressive plane and under the effect of less power.

If sealing is a bigger cross section, the general practice is to replace sealing ring with the sealing strip that is embedded in the groove; In view of the reason of groove, the shell that existing way all is to use extrusion process to produce cooperates with sealing strip; What but extrusion process was brought is expensive die cost.

Often require expensive water proof type connector to realize when in addition, electronic product has wire harness turnover shell.

Cause its use that in the market of some price competition fiercenesses such as electric bicycle controller market, can not be considered and the cost of this connector is too high; Yet also there is not good low cost method to realize dustproof and waterproof reliably in such market, though need in the practical application.

In sum, how satisfying on the basis of sealing property, take into account the encapsulation scheme that cost and other performances (as the heat dissipation problem that needs to consider) are designed a best in the power electronic product, is a quite valuable problem.

Summary of the invention

The present invention seeks to propose the seal structure for casing that a kind of convenience is produced, the suitable extrusion process of good seal performance produces.

Technical solution of the present invention is: comprising that having at least one end is that the openend of the main casing of openend connects end cap by pressure piece, between the described end cap face relative with main casing, sealing strip is set, it is characterized in that in the end cap side towards main casing annular concave channels being set, described sealing strip is spacing in annular concave channels.

It is that openend one end is blind end that the present invention selects an end, or two ends all are that the openend of the main casing of openend is basic sealing surface one side, be the opposite side of above-mentioned basic sealing surface with the side cover that independently contains the groove of laying sealing strip, and by being placed in the sealing of finishing described basic sealing surface when sealing strip in the described groove forms pressure mutually in the both sides of described basic sealing surface.

The present invention also is applicable to the housing that non-extrusion process produces, and comprises casting, melting welding, the housing that technologies such as injection moulding produce.

The present invention realizes enclosure interior sealing to external world with a kind of simple and reliable hermetically-sealed construction, realizes the performance of dustproof and waterproof.

Especially for electronic product, can avoid using expensive casting technique or the turnover line connector of high IP grade, further to reduce production costs.

Realize that based on sealing ring the essence of sealing is to realize the characteristic of bigger deformation on the narrower pressure-bearing surface, the present invention is easy for installation by means of one of sealing strip proposition, good seal performance, technology is simple, and need not use the method for the sealing problem of the shell that extrusion process forms.

In the end cap outer end away from main casing first outer end cap is set, described first outer end cap forms relatively-stationary the connection by first connector and end cap, on described end cap and first outer end cap, offer first accordingly respectively and advance wire hole, advance first sealing ring that the wire hole setting can place the turnover line corresponding to first between first outer end cap and end cap, described first sealing ring is forming between turnover line and first sealing ring and the sealing between turnover line and first outer end cap because of extruding under the effect of described first connector.

Above scheme is when containing electronic devices and components when uncovered shape main casing inside inlet wire or outlet requirement are arranged, and this turnover line is come in and gone out via the wire hole that advances of end cap.

When containing the end cap of the groove of laying sealing strip, can under pressure, fill up this slit and finish seal request by being enclosed within sealing ring on this line in slit that end cap forms.

This pressure can be formed by this end cap and outer end cap mutual extrusion.

In addition, the free end of described first connector passes the connecting hole that arranges on the connecting hole that arranges on first outer end cap and the end cap with being threaded on the main casing.

The technical program will unite two into one with the connector that is used for being connected outer end cap for the pressure piece that connects main casing and end cap, make things convenient for production, make things convenient for Fast Installation and maintenance.

The free end of first connector also can pass the connecting hole that arranges on first outer end cap and directly be threaded on the end cap.

The end cap of the technical program and housing separate connection do not influence being connected of outer end cap and end cap.

In the time need designing at the sealed end do turnover line of housing, described tubular main casing is provided with the sealed end of disjunctor, arranged outside second outer end cap at described sealed end, described second outer end cap forms relatively-stationary the connection by second connector with the sealed end of main casing, on described sealed end and second outer end cap, offer second accordingly respectively and advance wire hole, second advance between the wire hole corresponding to second to advance second sealing ring that the wire hole setting can place the turnover line between sealed end and second outer end cap, described second sealing ring is forming between turnover line and second sealing ring and is passing in and out sealing between line and second outer end cap because of extruding under the effect of described second connector.

By with upper type, also can finish the sealing of turnover line end.

Description of drawings

Structural representation when Fig. 1 does not pass in and out line for product of the present invention.

Fig. 2 is the enlarged diagram of end cap among Fig. 1.

Sealing strip deformation schematic diagram when Fig. 3 forms a fixed connection for the product of Fig. 1.

Structural representation when Fig. 4 has the design of turnover line for product of the present invention.

Fig. 5 is the enlarged diagram of end cap among Fig. 4.

Fig. 6 is the enlarged diagram of outer end cap among Fig. 4.

Structural representation when Fig. 7 passes in and out the line design for the sealed end of housing.

Embodiment

Example one: when product does not pass in and out requiring of line, as shown in Figure 1, 2, 3.

Among Fig. 1,2,3, the 1st, the two ends that form by the extruding that stretches all are the uncovered shape main casing of openend, the 2nd, can be nested in the sealing strip in the annular concave channels 4 on the end cap 3, the 3rd, end cap, the 4th, the annular concave channels on the end cap 3, the 5th, be used for through hole fixing between end cap 3 and the main casing 1 on the end cap.

Can earlier sealing strip 2 be put into groove 4 during installation, again end cap 3 is fixed on the main casing 1 through holding screw 8.

As long as guarantee that main casing 1 cross section can cover fully or most of position that covers sealing strip 2, at connection pressure lower seal bar 2 distortion and the filling grooves 4 of holding screw 8.

As shown in Figure 3, shape when being stressed for

sealing strip

2,6 is basic sealing surface.

Example two: when product had requiring of turnover line, selecting open side was wire harness turnover side, shown in Fig. 4,5,6.

Among Fig. 4,5,6,1 is that two ends all are the uncovered shape main casing of openend, the 2nd, can be nested in the sealing strip in the annular concave channels of covering on 34,3 is end cap, 4 is the annular concave channels on the

end cap

3,5 for being opened in the connecting hole on end cap 3 and the outer end 6 respectively, 6 is outer end cap, and 7 for being opened in the wire hole that advances on outer end cap 6 and the end cap 4 respectively accordingly, and 8 is holding screw, 9 are the turnover line, and 10 for being enclosed within the sealing ring between end cap 3 and outer end cap 6 on the turnover line 9.

The free end of holding screw 8 passes the connecting hole 5 that arranges on outer end cap 6 and the end cap 3, is threaded in then on the main casing 1.

If the material of end cap 3 allows, as working of plastics, the extruding of 6 pairs of end caps 3 of outer end cap also can realize easily in other suitable positions by self-tapping screw, not be limited by shown in Figure 4.

As long as between turnover line and sealing ring 10, pass in and out between line and the outer end cap 6 and can both form sealing.

Example three: when product has requiring of turnover line, select the non-open side of uncovered shape main casing, namely sealed end passes in and out side as wire harness.

As shown in Figure 7, uncovered shape main casing 1 is provided with the sealed end of disjunctor, can connect outer end cap 6 by connecting screw in the outside of sealing end, makes outer end cap 6 form relative solid connection by connecting screw with the sealed end of main casing 1.

On sealed end and outer end cap 6, offer into wire hole 11 accordingly respectively, corresponding to advancing the sealing ring 10 that wire hole 11 setting can place turnover line 9, sealing ring 10 is forming between turnover line 9 and the sealing ring 10 because being squeezed in turnover line 9 peripheries under the effect of connecting screw, is passing in and out between line 9 and the outer end cap 6 and all form sealing between sealed end and outer end cap 6.

Claims

1. seal structure for casing, comprise and have the uncovered shape main casing that at least one end is openend, openend at described main casing connects end cap by pressure piece, between the described end cap face relative with main casing, sealing strip is set, it is characterized in that in the end cap side towards main casing annular concave channels being set, described sealing strip is spacing in annular concave channels.

2. according to the described seal structure for casing of claim 1, it is characterized in that in the end cap outer end away from main casing first outer end cap being set, described first outer end cap forms relatively-stationary the connection by first connector and end cap, on described end cap and first outer end cap, offer first accordingly respectively and advance wire hole, advance first sealing ring that the wire hole setting can place the turnover line corresponding to first between first outer end cap and end cap, described first sealing ring is forming between turnover line and first sealing ring and the sealing between turnover line and first outer end cap because of extruding under the effect of described first connector.

3. according to the described seal structure for casing of claim 2, the free end that it is characterized in that described first connector passes the connecting hole that arranges on the connecting hole that arranges on first outer end cap and the end cap with being threaded on the main casing.

4. according to the described seal structure for casing of claim 2, the free end that it is characterized in that described first connector passes the connecting hole that arranges on first outer end cap and is threaded on the end cap.

5. according to the described seal structure for casing of claim 1, it is characterized in that described uncovered shape main casing is provided with the sealed end of disjunctor, arranged outside second outer end cap at described sealed end, described second outer end cap forms relative solid connection by second connector and the sealed end of main casing, on described sealed end and second outer end cap, offer second accordingly respectively and advance wire hole, second advance between the wire hole corresponding to second to advance second sealing ring that the wire hole setting can place the turnover line between sealed end and second outer end cap, described second sealing ring is forming between turnover line and second sealing ring and is passing in and out sealing between line and second outer end cap because of extruding under the effect of described second connector.