Water-proof rubber casing

A technology of rubber sleeves and components, which is applied in the direction of multi-purpose hand tools, electrical components, bases/housings, etc., can solve the problems of poor insertion workability, increased insertion resistance, and reduced waterproofness, so as to improve insertion workability , improve water resistance, uniform compression effect

Inactive Publication Date: 2002-05-15
TE CONNECTIVITY GERMANY GMBH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the waterproof rubber sleeve 111 in the above-mentioned scheme pays attention to waterproofness and is molded by a single material of soft synthetic resin such as rubber. When it is used, cracks are likely to occur on the inner peripheral surface of the through hole 121 due to the contacts, and water intrudes from the cracks, thereby reducing the waterproofness.
[0012] Among them, it is considered that the waterproof rubber sleeve 111 is integrally formed with a material with a large expansion rate and low hardness, and cracks are likely to occur. However, like this, the waterproofness between the connector housing 140 and the waterproof rubber sleeve 111 is reduced.
In addition, since the hardness of the material is low, when inserting a contact for connecting electric wires, the insertion resistance becomes large, and the insertion workability is not good.

Method used

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Examples

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Embodiment Construction

[0028] An embodiment of the present invention will be described below with reference to the accompanying drawings.

[0029] The waterproof rubber bushing 1 in the present invention, as shown in Fig. 1(A) to Fig. 1(F), is a substantially rectangular body, composed of a first member 20 and a second member 30 with different hardness, and is formed as The first part 20 is surrounded by the second part 30 . The first part 20 includes: three through holes 21 for passing the wires (not shown) connecting the contacts (not shown), and for aligning the waterproof rubber sleeve 1 with the connector housing 40 The three protrusions 23. The three through holes 21 are arranged in an inverted triangle shape, and are formed through the front and rear surfaces of the waterproof rubber sleeve 1 (the left and right surfaces in FIG. 1(F)). On the inner peripheral surface of each through hole 21, a first sealing portion 22 forming three annular ribs 22a for closely contacting the electric wire is...

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Abstract

To provide a waterproof grommet capable of preventing a split of an inner circumferential face of a through-hole formed on the waterproof grommet without deteriorating waterproofness. A first member 20 formed in the inner circumferential face of at least one through-hole 21 allowing penetration of an electric wire connected to a contact and having a first sealing part 22 capable of adhering closely to the electric wire is formed by an elastic material with hardness lower than a second member 30 formed on an outer circumferential face and having a second sealing part 32 capable of adhering closely to a connector housing 40.

Description

technical field [0001] The present invention relates to a waterproof rubber sleeve of a connector, in particular to an effective technique for preventing cracks that are easily generated on the inner peripheral surface of the through hole when the contact piece connected with the electric wire passes through the through hole of the waterproof rubber sleeve . Background technique [0002] Generally, in order to prevent the intrusion of water into the connector, a waterproof rubber sleeve provided with annular ribs around it is used so as to be in close contact with the outer peripheral surface of the wire connecting the contact and the inner peripheral surface of the connector housing. [0003] A through hole corresponding to the inner cavity of the contact (contact insertion hole) is formed in the waterproof rubber sleeve. Using the waterproof rubber sleeve, when inserting multiple wires connected to the contact into the inner cavity of the contact, consider its workability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R13/52H02G3/22
CPCH01R13/5208H01R13/52
Inventor 安田登蔡德明
Owner TE CONNECTIVITY GERMANY GMBH
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