JP2011108485A - Gasket for bulb socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve sealing performance of a gasket. <P>SOLUTION: The gasket 10 for a bulb socket 20 fixes a hood part 24 installed around a bulb holder 41 holding a bulb B to a lamp house 30 by inserting into an installation hole 31 provided penetrating the lamp house 30 to rotation stop it. A surface seal portion 12 capable of contacting the flange part 22 provided at the outer circumference of the hood part 24 and an axial seal portion 11 extended in the axial direction of the hood part 24 from the surface seal portion 12 along the outer circumference of the hood part 24 are formed integrally, and the surface seal portion 12 is pinched in the axial direction of the hood part 24 between the flange part 22 and the rear side opening edge 33 of the installation hole 31 arranged opposed to this, and the axial seal portion 11 is pinched in a diameter direction of the hood part 24 between the outer circumference of the hood part 24 and the inner circumferential face 34 of the installation hole 31 arranged opposed to this. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a gasket for a valve socket.

  Conventionally, as a gasket for a valve socket, for example, the one described in Patent Document 1 below is known. The valve socket includes a valve holder that holds the valve, and a hood portion is formed around the valve holder. A flange portion is provided around the outer peripheral surface of the hood portion, and a gasket is attached so as to contact the flange portion and the outer peripheral surface of the hood portion.

  On the other hand, a mounting portion (for example, a lamp house) to which the bulb socket is mounted is provided with a mounting hole through which the hood portion is inserted. By inserting the hood part into the mounting hole and stopping the rotation, the valve socket is fixed to the mounted part, and the gasket is narrowed in the axial direction of the hood part between the opening edge of the mounting hole and the flange part. The space between them is designed to be waterproof.

Japanese Utility Model Publication No. 62-165686

  However, for example, when the rotation is stopped in a state where an excessive force is applied to the gasket, the sealing performance may be deteriorated due to deformation of the gasket.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve the sealing performance of a gasket.

  The present invention relates to a gasket for a valve socket which is fixed to a mounted portion by inserting a hood portion provided around a valve holder for holding a valve into a mounting hole penetrating the mounted portion and stopping the rotation. A surface seal portion that can contact a flange portion that is provided around the outer peripheral surface of the hood portion, and a shaft that extends from the surface seal portion along the outer peripheral surface of the hood portion in the axial direction of the hood portion. The seal portion is integrally formed, and the face seal portion is narrowed in the axial direction of the hood portion between the flange portion and the opening edge portion of the mounting hole disposed opposite to the flange portion. Is characterized in that the pressure is narrowed in the radial direction of the hood portion between the outer peripheral surface of the hood portion and the inner peripheral surface of the mounting hole disposed opposite thereto.

  According to such a configuration, since the shaft seal portion can be waterproofed in addition to the face seal portion, even if one of the both seal portions has a problem, the other can be waterproofed. Therefore, the sealing performance of the gasket can be improved.

The following configuration is preferable as an embodiment of the present invention.
It is good also as a structure provided with the contact | adherence surface closely_contact | adhered to the outer peripheral surface of a hood part.
According to such a configuration, when the hood portion is inserted into the mounting hole and is prevented from rotating, the close contact surface is in close contact with the outer peripheral surface of the hood portion.

The taper surface which approaches the outer peripheral surface of a hood part may be formed in the axial direction front-end | tip part of the hood part in a shaft seal part so that it may leave | separate from the surface seal part provided in the back end part.
According to such a configuration, the taper surface is in sliding contact with the opening edge of the mounting hole, so that the shaft seal portion can be guided when being inserted into the mounting hole.

  According to the present invention, the sealing performance of the gasket can be improved.

Sectional view of the valve socket and gasket as viewed from the side Front view of valve socket Rear view of valve socket

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the valve socket 20 of the present embodiment includes a substantially cylindrical socket body 21, a connector (not shown) that can be attached to and detached from the rear side of the socket body 21, a socket body 21, A gasket 10 that waterproofs the lamp house (an example of the “attached portion” of the present invention) 30 is provided. In the following description, the front (front side) is the left side (left side) in FIG.

  A partition wall 23 is formed inside the socket body 21, a front portion of the partition wall 23 is a hood portion 24, and a rear portion of the partition wall 23 is a connector fitting portion 25. As shown in FIG. 2, the hood portion 24 has a substantially cylindrical shape. As shown in FIG. 3, the connector fitting portion 25 has a substantially rectangular cylindrical shape that is long in the vertical direction. The above-described connector can be fitted into the connector fitting portion 25.

  As shown in FIG. 1, a flange portion 22 is provided around the outer peripheral surface of the hood portion 24. A plurality of attachment projections 26 are provided in front of the flange portion 22 on the outer peripheral surface of the socket body 21. As shown in FIG. 2, the plurality of attachment protrusions 26 are intermittently arranged at equiangular intervals along the circumferential direction.

  A pair of tab terminals 40 having a + side and a − side that are electrically connected to the valve B are mounted inside the connector fitting portion 25. The partition wall 23 is formed with a pair of insertion holes 23 </ b> A penetrating in the front-rear direction so as to fit the outer peripheral shape of the tab terminals 40 and allow the tab terminals 40 to be inserted. As a result, the tab terminals 40 are mounted in a state where they are positioned vertically and horizontally inside the connector fitting portion 25.

  On the other hand, a valve holder 41 formed integrally with both tab terminals 40 is mounted inside the hood portion 24. The valve holder 41 functions as a holder for attaching the valve B while sandwiching an electrode (not shown) of the valve B. The electrode of the valve B is composed of a + side and a − side, and contact portions that sandwich each electrode are electrically connected to the corresponding tab terminals 40. The valve B is a known wedge base valve.

  A pair of locking pieces 42 are provided on both upper and lower sides of the valve holder 41. Both locking pieces 42 can be locked in the front-rear direction with a pair of upper and lower locking protrusions 24 </ b> A provided on the inner surface of the hood portion 24. In a state where both locking pieces 42 are locked to both locking protrusions 24 </ b> A, the rear surface of the valve holder 41 is in contact with the front surface of the partition wall 23. Accordingly, the valve holder 41 is mounted in a state where the valve holder 41 is positioned in the front-rear direction inside the hood portion 24.

  On the other hand, the lamp house 30 is provided with a mounting hole 31 through which the hood portion 24 is inserted. The attachment hole 31 is provided with a plurality of notches (not shown) corresponding to the plurality of attachment protrusions 26. After inserting the hood portion 24 into the mounting hole 31 so that the plurality of mounting projections 26 fit the corresponding notches, the hood portion 24 is rotated, so that the plurality of mounting projections 26 become the front opening edge 32 of the mounting hole 31. And lock in the front-rear direction. Thereby, the bulb socket 20 is attached and fixed to the lamp house 30.

  The gasket 10 is formed by molding an elastic material such as rubber into a substantially cylindrical shape. The gasket 10 includes a cylindrical shaft seal portion 11 extending in the front-rear direction along the outer peripheral surface of the hood portion 24, and a ring-shaped surface seal portion 12 projecting radially outward from the rear end portion of the shaft seal portion 11. It is composed of Further, on the inner surface side of the gasket 10, a flat contact surface 13 that is in close contact with the outer peripheral surface of the hood portion 24 in a surface contact state is formed. As a result, it is possible to eliminate problems such as the gasket 10 turning up when the valve socket 20 is stopped.

  The shaft seal portion 11 is narrowed in the radial direction of the hood portion 24 between the outer peripheral surface of the hood portion 24 and the inner peripheral surface 34 of the mounting hole 31 facing the hood portion 24. On the other hand, the face seal portion 12 is compressed in the axial direction of the hood portion 24 between the front surface of the flange portion 22 and the rear opening edge portion 33 of the mounting hole 31 facing the flange portion 22. As a result, the space between the bulb socket 20 and the lamp house 30 is waterproofed by both the shaft seal portion 11 and the face seal portion 12.

  A tapered surface 14 is provided around the front end portion of the shaft seal portion 11. The tapered surface 14 has an inclined surface that approaches the outer peripheral surface of the hood portion 24 as it goes forward. Therefore, when the shaft seal portion 11 is inserted into the mounting hole 31 from behind, the shaft seal portion 11 is guided to the proper fitting position by the sliding contact of the tapered surface 14 with the opening edge of the mounting hole 31. Can do.

  The present embodiment is configured as described above, and its operation will be described subsequently. First, in order to attach the valve B to the valve socket 20, the wedge base of the valve B is inserted into the valve holder 41 in the hood portion 24, and each electrode of the valve B is sandwiched by each contact portion in the valve holder 41. Thereby, the valve B is held by the valve holder 41.

  Next, the hood portion 24 is inserted into the mounting hole 31 of the lamp house 30 from the rear. Then, the taper surface 14 of the shaft seal portion 11 of the gasket 10 comes into sliding contact with the opening edge of the mounting hole 31 and is guided to a proper fitting position. At the same time, the flange portion 22 is pressed against the rear opening edge 33 of the mounting hole 31 while bending the face seal portion 12 of the gasket 10 while passing the plurality of mounting protrusions 26 through the corresponding notches. . When the hood portion 24 is turned, the plurality of attachment projections 26 are engaged with the front opening edge 32 of the attachment hole 31 and the valve socket 20 is attached in the state shown in FIG. At this time, since the contact surface 13 of the gasket 10 is in close contact with the outer peripheral surface of the hood portion 24, the gasket 10 does not turn over.

  In this state, since the space between the lamp house 30 and the bulb socket 20 is waterproofed by both the shaft seal portion 11 and the face seal portion 12, the sealing performance of the gasket 10 can be improved. Thereby, it can be set as the lamp | ramp which does not permeate into the lamp house 30 from the bulb | ball socket 20, and a lens becomes cloudy. In the above embodiment, since the shaft seal portion 11 is formed integrally with the surface seal portion 12, the number of parts can be reduced, and the gasket 10 can be easily attached to the outer peripheral surface of the hood portion 24. it can.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the flat contact surface 13 is provided in the above embodiment, according to the present invention, a plurality of lip portions may be provided, and the lip portions may be brought into close contact with the outer peripheral surface of the hood portion 24 while being crushed. Good.

  (2) Although the tapered surface 14 is provided in the above embodiment, according to the present invention, the tapered surface 14 does not necessarily have to be formed at the front end portion of the shaft seal portion 11, and instead the rear side of the mounting hole 31. A taper surface for guiding may be formed on the opening edge 33.

DESCRIPTION OF SYMBOLS 10 ... Gasket 11 ... Shaft seal part 12 ... Face seal part 13 ... Contact surface 14 ... Tapered surface 20 ... Valve socket 22 ... Flange part 24 ... Hood part 30 ... Lamp house (attachment part)
31 ... Mounting hole 33 ... Rear opening edge 34 ... Inner peripheral surface 41 ... Valve holder B ... Valve

Claims (3)

A valve socket gasket that is fixed to the mounted portion by inserting a hood portion provided around a valve holder that holds the valve into a mounting hole that penetrates the mounted portion to prevent rotation. ,
A surface seal portion that can contact a flange portion that is provided around the outer peripheral surface of the hood portion, and a shaft seal portion that extends from the surface seal portion along the outer peripheral surface of the hood portion in the axial direction of the hood portion. And are integrally formed,
The face seal portion is narrowly pressed in the axial direction of the hood portion between the flange portion and the opening edge portion of the mounting hole disposed to face the flange portion,
The valve socket, wherein the shaft seal portion is narrowly pressed in a radial direction of the hood portion between an outer peripheral surface of the hood portion and an inner peripheral surface of the mounting hole disposed to face the shaft seal portion. Gasket.   The gasket for a valve socket according to claim 1, further comprising a contact surface that is in close contact with the outer peripheral surface of the hood portion.   A taper surface that approaches the outer peripheral surface of the hood portion as the distance from the face seal portion provided at the rear end portion is formed at an axial front end portion of the hood portion in the shaft seal portion. The gasket for valve sockets according to claim 1 or 2.

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