GB2044002A - Waterproof seal for a push- button - Google Patents
Waterproof seal for a push- button Download PDFInfo
- Publication number
- GB2044002A GB2044002A GB8002118A GB8002118A GB2044002A GB 2044002 A GB2044002 A GB 2044002A GB 8002118 A GB8002118 A GB 8002118A GB 8002118 A GB8002118 A GB 8002118A GB 2044002 A GB2044002 A GB 2044002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waterproof seal
- panel
- button
- push button
- substantially cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
- H01H2009/048—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings using a sealing boot, e.g. the casing having separate elastic body surrounding the operating member and hermetically closing the opening for it
Landscapes
- Push-Button Switches (AREA)
Abstract
A waterproof seal for a switch push button 10 in a panel 11 comprises a shroud of resilient material having a cylindrical portion 1 and closed at one end 2. The closed end 2 is collapsible inwardly and the open end is sealable to the panel 11. The seal is useful for protecting push buttons in control panels in watercraft and other vehicles exposed to wet conditions. <IMAGE>
Description
SPECIFICATION
Waterproof seal for a push-button
This invention relates to a waterproof seal for a
push button and to a sealed push button
assembly.
Control panels frequently have push buttons to
operate switches. A spring-loaded button is
pressed to give the "on" position. The button is
caused to return to the "off" position either by
pressing a second "release" button on the panel or
by a second press on the same button. The button
itself gives both a visual and a tactile indication of
whether it is in the "on" or "off" position. There is
inevitably a small gap between the button and the surrounding panel. The use of such push buttons
in control panels in watercraft and other vehicles
exposed to wet conditions has hitherto been
somewhat restricted, because water has been found to leak into electrical components behind the control panel through the gap around the
button.
There is therefore a requirement for push
buttons in a control panel to be sealed in a watertight fashion. In principle this can be done by providing a cover for the button and sealing the cover, for example by glue, to the panel around the button. The cover must be sufficiently flexible to allow the button to be pressed in and released relative to the panel, and rubber would be asuitable material for such a cover. However, this arrangement suffers from two disadvantages. The cover is not readily detachable from the panel, and this makes servicing of the button difficult. As the button is covered, there is no visual or tactile indication of whether the button is in the "on" or "off" position.
An object of this invention is to provide a waterproof seal for a push button which does not suffer from the disadvantages outlined above.
The invention provides a waterproof seal for a push button in a panel, comprising a shroud of resilient material having a substantially cylindrical portion and closed at one end, the closed end being collapsible inwardly and the open end being sealable to the panel.
The invention also provides a sealed push button assembly, comprising a push button mounted in a panel, an upstanding cylindrical member mounted on the panel and surrounding the push button, and a waterproof seal as defined above surrounding the upstanding cylindrical member and shrouding the push button, the waterproof seal-cooperating with the upstanding cylindrical member to effect sealing by compression of the open end of the waterproof seal against the panel.
In a preferred embodiment, the substantially cylindrical portion coaxiallyand sealingly adjoins a screw-threaded, substantially cylindrical metal member adapted to cooperate with a screwthreaded member surrounding the button. The metal member is preferably an insert accommodated within the cylindrical portion, such that, when the combination of seal and metal insert is screwed onto the member surrounding the button, part of the seal is compressed between the metal insert and the panel, thus providing effective sealing.
In another embodiment, the cylindrical portion extends around the button to the back of the panel, and sealing is effected by pressing a lip at the open end against the back of the panel.
The closed end is preferably resiliently biased towards the collapsed portion.
Reference is now made to the accompanying drawing, which shows an axial slice of a preferred embodiment of push button seal according to the invention, together with the push button and associated components shown partly in section.
The seal shown in the drawing comprises a shroud of resilient silicone rubber. Silicone rubber is a particularly suitable material because it has a good "memory". A substantially cylindrical portion 1 has a closed end wall 2, an internal circumferential flange 3 and an inwardly directed circumferential end flange 4.
The closed end wall 2 is collapsible inwardly and is resiliently biased towards the collapsed position (shown by solid lines) in which it is coneshaped. When pressure is applied to the inside surface of the wall 2 it is gradually transformed into a flat disc, and eventually it will "flip" over to the non-collapsed position (shown by broken lines) in which the original cone has become inverted. When the pressure is released, the wall collapses to its original position which is determined by circular grooves 5, 6, 7 on the outside surface and by the "memory" of the silicone rubber. The resilient bias towards the collapsed position is achieved by virtue of the stresses which are set up in the silicone rubber as it is transformed from the cone shape to the flat disc and beyond. These stresses are released when the rubber springs back to the cone shape.
The internal wall of the cylindrical portion 1 between the flanges 3 and 4 accommodates a cylindrical metal insert 8. The insert terminates within the open end of the seal and is internally screw-threaded on its cylindrical surface 9. The push button 10 to be sealed projects through a panel 11.
Immediately surrounding the button there is mounted on the panel a circular upstanding flange 12 which is screw-threaded on the outside so as to cooperate with the internal screw threads of the insert 8. As the combined insert and seal are screwed onto the upstanding flange, the end flange 4 of the seal is compressed between the insert and the panel and makes a waterproof seal.
A ring 1 3 of semi-circular section is provided on the bottom surface of the flange 4 to improve this seal.
When the closed end wall 2 of the seal is pressed, the button is pushed to its "on" position.
The closed end wall remains in its collapsed position and gives a visual and tactile indication that the button is "on". Wlhen the end wall is pressed again, or when a second "release" button is pressed, the button returns to the "off" position and the end wall is then held in the non-collapsed state by the button. Again, this gives a visual and tactile indication that the button is "off". Simply unscrewing the combined seal and insert will afford access to the button for servicing.
Claims (7)
1. A waterproof seal for a push button in a panel, comprising a shroud of resilient material having a substantially cylindrical portion and closed at one end, the closed end being collapsible inwardly and the open end being sealable to the panel.
2. A waterproof seal according to claim 1, in which the closed end is resiliently biased towards the collapsed position.
3. A waterproof seal according to claim 1 or 2, in which the substantially cylindrical portion coaxially and sealingly adjoins an internally screwthreaded, substantially cylindrical insert adapted to cooperate with an externally screw-threaded member surrounding the button.
4. A sealed push button assembly, comprising a push button mounted in a panel, an upstanding cylindrical member mounted on the panel and surrounding the push button, and a waterproof seal as claimed in claim 1 surrounding the upstanding cylindrical member and shrouding the push button, the waterproof seal cooperating with the upstanding cylindrical member to effect sealing by compression of the open end of the waterproof seal against the panel.
5. An assembly according to claim 4, in which the substantially cylindrical portion of the waterproof seal coaxially and sealingly adjoins an internally screw-threaded, substantially cylindrical insert which cooperates with a screw-threaded outer surface of the upstanding cylindrical member to effect compression of the open end of the waterproof seal against the panel.
6. A waterproof seal according to claim 1, substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
7. A sealed push button assembly, substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8002118A GB2044002A (en) | 1979-01-25 | 1980-01-22 | Waterproof seal for a push- button |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7902745 | 1979-01-25 | ||
GB8002118A GB2044002A (en) | 1979-01-25 | 1980-01-22 | Waterproof seal for a push- button |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2044002A true GB2044002A (en) | 1980-10-08 |
Family
ID=26270342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8002118A Withdrawn GB2044002A (en) | 1979-01-25 | 1980-01-22 | Waterproof seal for a push- button |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2044002A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836013A1 (en) * | 1988-10-22 | 1990-04-26 | Schlegel Georg Gmbh & Co | Sealable push-button device, especially for electrical switches |
GB2229861A (en) * | 1989-03-22 | 1990-10-03 | Daiichi Denso Buhin | Retractive push button switches |
JP2013062075A (en) * | 2011-09-12 | 2013-04-04 | Omron Corp | Cover and switch using the same |
-
1980
- 1980-01-22 GB GB8002118A patent/GB2044002A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836013A1 (en) * | 1988-10-22 | 1990-04-26 | Schlegel Georg Gmbh & Co | Sealable push-button device, especially for electrical switches |
GB2229861A (en) * | 1989-03-22 | 1990-10-03 | Daiichi Denso Buhin | Retractive push button switches |
GB2229861B (en) * | 1989-03-22 | 1993-07-28 | Daiichi Denso Buhin | Self-resetting push switch |
JP2013062075A (en) * | 2011-09-12 | 2013-04-04 | Omron Corp | Cover and switch using the same |
CN103151201A (en) * | 2011-09-12 | 2013-06-12 | 欧姆龙株式会社 | Cover and switch using the same |
CN103151201B (en) * | 2011-09-12 | 2016-05-04 | 欧姆龙株式会社 | The switch of cover cap and this cover cap of use |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |