Lamp socket

Details Lamp socket Lamp socket

2000-03-16

2001-12-04

Abrams, Neil (Department: 2839)

Electrical connectors

Coupling part including flexing insulation

Sealing

C439S918000

Reexamination Certificate

active

06325668

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to lamp sockets for receiving lamps such as automobile headlights.
2. Description of the Related Art
Recently, lamps as bright as daylight, such as automobile headlights, have been developed. Japanese patent application Kokai No. 172156/90 discloses such an automobile headlight. As
FIG. 11
shows, the headlight includes a socket
90
with a plug section
91
having a plate
93
which extends rearwardly from a housing section
92
. Two plug pins
94
and
95
extend through the plate
93
into a sleeve
96
. In order to withstand against high voltages produced upon turning on the lamp, partition walls
98
and
99
of an insulation material are provided between the plug pins
94
and
95
within the sleeve
96
and a cavity
97
, which is closed with a removable cover.
Alternatively, a resin is charged or fused between the plug pins
94
and
95
to withstand against the high voltages.
However, when the partition walls
98
and
99
are used between the plug pins
94
and
95
, a small gap is created and satisfactory voltage resistance is not obtained. Consequently, when an instantaneous high voltage, such as 30 KV, is applied, a spark is produced between the plug pins
94
and
95
, causing damage to the equipment.
When a resin is charged or fused between the plug pins
94
and
95
, the number of assembling steps is increased, resulting in the increased manufacturing costs.
Where the partition wall
98
is provided between the plug pins
94
and
95
in the cavity
97
, which is closed with a removable cover, the socket
90
and the cover make noise owing to the vibration of a vehicle.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the invention to provide a lamp socket which withstands against instantaneous high voltages and does not require a large number of assembling steps, thus reducing the manufacturing costs.
According to one aspect of the invention there is provided a lamp socket which includes a socket body having a socket fitting section for receiving a lamp fitting section of a lamp; a first terminal mounting section provided at a center of the socket fitting section; a first terminal provided in the first terminal mounting section; a second terminal mounting section provided in a circumferential wall of the socket fitting section; a second terminal provided in the second terminal mounting section a cover attachable to the back of the socket body;
first and second terminal receiving cavities provided in the cover; a seal groove provided in the cover so as to surround the first terminal cavity; a seal insulation member fitted in the seal groove; and a seal press portion provided on the back of the socket body such that when the cover is attached to the socket body, the seal press portion is fitted into the groove to press down the seal insulation member in the groove.


REFERENCES:
patent: 5643006 (1997-07-01), Wang et al.
patent: 5814765 (1998-09-01), Bauer et al.
patent: 5823806 (1998-10-01), Nagase et al.
patent: 5842882 (1998-12-01), Sato et al.
patent: 5897391 (1999-04-01), Takashi et al.
patent: 5924884 (1999-07-01), Sato et al.
patent: 6056575 (2000-05-01), Sato et al.

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