Waterproof housing of apparatus

A shell and film technology, applied in brushes, knives, cleaning teeth, etc., can solve problems such as limiting pressure balance functions

Inactive Publication Date: 2003-01-29
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, such films can only breathe in one direction, which limits their pressure equalization function

Method used

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  • Waterproof housing of apparatus
  • Waterproof housing of apparatus
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Examples

Experimental program
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Embodiment Construction

[0020] figure 1 A partial cross-section through the housing of a rechargeable electric device is schematically shown. The housing 1 is formed by a wall 1a, and is preferably made of synthetic resin.

[0021] A rechargeable electric device such as a razor, an electric toothbrush, etc. is often used in wet rooms such as bathrooms. For safety reasons, the housing of the device must at least be splash-proof, so seals are used in place within the housing.

[0022] Due to temperature differences, such as those caused by washing such a device under a hot tap, a pressure differential will develop between the interior 1b of the housing 1 and the external atmosphere 7 . These pressure differentials can damage the seals, with the result that the unit is no longer waterproof.

[0023] An opening 3a is provided in the wall 1a of the housing 1 for quickly equalizing such a pressure difference, which opening communicates with the interior 1b of the housing 1 . In order to prevent moistur...

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PUM

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Abstract

The invention relates to a waterproof housing (1) of an apparatus, for example an electrically rechargeable shaving device, which housing (1) is provided with at least one opening (3a,3b) in a wall (1a), which opening is sealed off by means of a foil (4) permitting the equalization of a pressure difference between the inside of the housing and the outer atmosphere. In order to provide means for the equalization of a pressure difference suitable for all kinds of apparatuses, which means are not susceptible of contamination and at the same time are capable of equalizing pressure differences, the foil (4) is elastically deformable and provided with at least one incision (8,9) of which the cutting edges can yield owing to a pressure difference across said foil.

Description

【Technical field】 [0001] The present invention relates to a waterproof housing for a device, such as a rechargeable electric shaver, which housing is provided with at least one opening in the wall, which opening is closed by a membrane, said The thin film makes it possible to achieve a pressure balance in the housing relative to the external atmospheric pressure. [0002] The invention further relates to a waterproof housing for a device such as a rechargeable electric shaver, wherein there is a separate battery compartment inside the housing for containing a rechargeable battery, the battery compartment being in the wall At least one opening is provided, which is closed by a membrane which makes it possible for gases generated during charging of the battery to flow from the battery compartment to the outside atmosphere. [0003] The invention further relates to a battery compartment for containing rechargeable batteries, such as used in a device such as a rechargeable electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46B15/00A61C17/22B26B19/38H01M50/342
CPCB26B19/3853Y10S30/01A61C17/225B26B19/38B26B19/3866
Inventor M·J·范德梅尔
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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