Seal structure for electric circuit unit

A technology of circuit unit and sealing structure, which is applied in the direction of circuits, cable entry sealing devices, electrical components, etc., can solve the problems that it is difficult to ensure the sealing performance, and the sealing parts 108 cannot be adhered to each other, so as to simplify the assembly work and realize the operation time Effect

Inactive Publication Date: 2008-01-30
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, as shown in FIG. 10 , when pressure is applied to the sealing member 108 by the fixing member 110 , pressure deformation is transferred to the inner peripheral surface of the small-diameter portion 106 a of the opening 106 and the outer peripheral surface of the cable 104 . Therefore, the pressure cannot be effectively applied to the inner peripheral surface of the small-diameter portion 106a of the opening 106 and the outer peripheral surface of the cable 104, and the sealing member 108 cannot be in close contact with them, making it difficult to ensure sufficient sealing performance.

Method used

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  • Seal structure for electric circuit unit
  • Seal structure for electric circuit unit
  • Seal structure for electric circuit unit

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Embodiment Construction

[0025] Hereinafter, embodiments of the sealing structure of the circuit unit according to the present invention will be described with reference to the drawings.

[0026] First, the overall structure of the circuit unit 100 using the sealing structure of the present invention will be described with reference to FIG. 8 . The circuit unit 10 includes: a circuit 12 ; a housing 14 for protecting the circuit 12 ; and a cable 16 connected to the circuit 12 for inputting and outputting signals or power supply. The housing 14 is provided with an opening 18 for passing the cable 16 from the outside to the inside of the housing 14 , and the opening 18 is provided with a sealing structure 20 for sealing the inside of the housing 14 from the outside of the housing 14 . In addition, connection members 22 such as connectors for conveniently connecting the cable 16 to the circuit 12 or external devices (not shown) are attached to both ends of the cable 16 .

[0027] 1 and 2 show main parts ...

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Abstract

A seal structure for an electric circuit unit is formed of an elastic material and includes an annular seal member mounted between an inner peripheral surface of an opening formed in a casing to pass a cable therethrough and an outer peripheral surface of the cable, a fixed member fixed on the casing at the opening, and a size-changing member formed with a through hole for allowing the cable to pass therethrough and adapted to change the size of the opening of the casing so as to fit the size of the outer periphery of the cable. The size-changing member is fixed in the opening, so that the fixed member is deformed by being held between the size-changing member and the fixed member, thereby bringing the seal member into close contact with the inner peripheral surface of the opening of the casing and the outer peripheral surface of the cable.

Description

technical field [0001] The present invention relates to a sealing structure of a circuit unit composed of a circuit, a case for protecting the circuit, and a cable connected to the circuit. Background technique [0002] The circuit unit includes: a circuit; a case for protecting the circuit; and a cable connected to the circuit for outputting an input signal or supplying power. Generally, for fixing and waterproofing the cables, a sealing structure 100 as shown in FIG. 9 is used for the portion leading the cables from the outside to the inside of the housing. Specifically, the casing 102 is provided with a stepped opening 106 composed of a small-diameter portion 106a and a large-diameter portion 106b through which the cable 104 passes, and an annular sealing member 108 composed of an elastic member such as a rubber sleeve is placed in the The large-diameter portion 106 of the opening 106 is fitted around the cable, and the fixing member 100 applies pressure to the sealing m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G15/013
CPCH01R13/5205H02K5/22H02G15/013H01R13/5216H05K5/069
Inventor 谷口满幸今井圭介长友一郎
Owner FANUC LTD
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