JP3459998B2 - Lamp socket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp socket, and more particularly to an improvement of a small lamp socket used by being arranged in a Christmas tree or a refrigerator.

[0002]

2. Description of the Related Art Conventionally, a small lamp socket of this type has been used which is integrally molded as a housing with a synthetic resin or the like, and is screwed into a screw on the outer periphery of a lamp base portion which serves as a peripheral electrode in the opening. A female screw part which is a peripheral terminal is formed, and the opening of this housing is IEC60238 (1) as an Edison screw lamp holder standard.
998).

FIG. 4 shows the VED standard, and defines a dimension in which the test finger 302 does not come into contact with the base portion when the lamp 300 is obliquely inserted into the opening of the socket 301. In order to satisfy this requirement, the conventional socket has the following characteristics when the lamp is inserted, as shown in FIG.
H1 is the dimension for inserting the lamp base 304 deeply.
And the base portion 30 of the lamp 300.
The female screw portion 303 of the socket 301 to which 4 is screwed is made of a metal capable of conducting so as to serve as a peripheral terminal.

Therefore, since the total length H of the lamp socket 301 becomes long and it is difficult to miniaturize the socket, the cap of the lamp 300 is kept constant with the size h1 of the lamp part 304 of the lamp 300 being completely inserted. A method of shortening the dimension h2 from the lower surface of the female screw portion 303 to which the portion 304 is screwed is adopted.

[0005]

However, according to this method, the length of the female screw portion 303 of the lamp socket 301 to which the screw portion formed in the base portion 304 of the lamp 300 is screwed is shortened. It is difficult to hold 300 in a stable state and it is easy to insert it in a tilted state,
Female screw portion 303 as a peripheral terminal and its center terminal,
There has been a problem that the base 304 serving as a peripheral electrode of the lamp 300 and the central electrode thereof have poor contact.

Therefore, the object of the present invention is to keep the lamp socket in a safe and stable state even when the total length of the lamp socket is shortened, and it is possible to hold the lamp socket between each electrode and each terminal of the lamp socket. An object is to provide a lamp socket with good contact.

[0007]

In order to achieve the above object, the present invention has the following technical means. That is, this will be described with reference to the reference numerals in the accompanying drawings corresponding to the embodiments of the present invention. In the present invention, an opening for mounting a base portion 4 serving as a peripheral electrode of a lamp 3 having a screw portion 5 formed on the outer periphery thereof is mounted. 2a is formed, a peripheral terminal 15 in the opening 2a in contact with the base 4 around the lamp 3, lamp socket 1 with a central pin 14 in contact with the central electrode 7 of the base 4 end center In the lamp socket 1, the female screw portion 6 shorter than the entire length of the screw portion 5 of the lamp 3 is formed on the inner peripheral wall of the opening 2a, and the terminal member 8 is arranged on the inner bottom surface of the opening 2a to insulate them. The housing 2 is integrally molded with a synthetic resin, and the terminal member 8 is made of a conductive metal.
Lee on the outer circumference of the annular holding member 12 formed in a cup shape in the genus
Cable 9 is directly connected to the annular holder 12 and the opening
With the lamp 3 of the ferrule portion 4 circumferential edge in contact capable the peripheral terminal 15 to be attached to the mouth 2a is erected held, annular holding member above the center pin 14 relative to the peripheral terminal 15 in an insulated state 12 made is holding the center, the peripheral terminal 15
Of the lamp 3 on both ends that are bent up in a U shape
The contacts 16a, 16b that contact the lower part of the periphery of the base 4
The pair of side contact pieces 15a having the formed restoring elasticity,
15b is erected on the inner peripheral wall of the annular holding body 12 which faces.
It is a lamp socket characterized by being held .
According to the above, the base portion 4 of the lamp 3 is attached to the lamp socket 1
When mounted in the opening 2a, the threaded portion 5 on the outer periphery of the lamp base portion 4 which is a peripheral electrode is screwed to the female threaded portion 6 of the lamp socket 1 integrally molded with an insulating synthetic resin.
When the lamp 3 is screwed into the female screw portion 6 shorter than the entire length of the screw portion 5 of the lamp 3, the center electrode 7 at the end of the base portion 4 is
While contacting the central terminal 14 held in the center of the annular holder 12 on the inner bottom surface of the lamp socket opening 2a, the peripheral edge of the end of the base portion 4 which is a part of the peripheral electrode is the annular holder 12 described above.
Restoration of the peripheral terminals 15 standingly held on the inner peripheral wall facing each other
At the tip of the pair of elastic side contact pieces 15a, 15b
The contacts 16a and 16b thus formed are elastically contacted in a pressed state. Therefore, even if the base portion 4 of the lamp 3 is screwed into the opening 2a of the lamp socket 1, the lamp socket 1
Since the opening 2a of the lamp is integrally molded with an insulating synthetic resin, it has safety and the screw portion 5 of the lamp 3 is short even when the total length of the lamp socket 1 is shortened. /> is screwed to reduced the internal thread portion 6 was able to hold in stable condition, the lamp 3 mounted in the lamp socket 1,
While the center electrode 7 and the center terminal 14 are in contact with each other, it is possible to maintain a good contact state between the peripheral edge of the base 4 which is a part of the peripheral electrode and the peripheral terminal 15 standingly held by the annular holder 12. it can. Further, the periphery of the end of the base 4 is the contact 16
When contacting a and 16b, a pair of side contact pieces 15
The outward displacement of a and 15b causes the annular holder 12 to face each other.
Since it is regulated by the inner peripheral wall,
The repeated strength of the id contact pieces 15a and 15b is maintained,
It is possible to maintain a better contact state with the peripheral edge of the end of the base 4.
it can.

[0008] Further, the present invention is, in the above Symbol heart terminals 14, peripheral
It has conductivity through the insulating plate 18 at the upper center of the terminal 15.
Is fixed to the fixed shaft 13 and the annular holder 12
Terminal plate 20 connected to the other lead wire 10 directly to the lower surface of
Penetrated the annular holder 12 through the insulating plate 19.
The lamp socket is fixed to the fixed shaft 13 . According to the above , the insulating plate 18 is provided on the upper center of the peripheral terminal 15.
The central terminal 14 is fixed to the fixed shaft 13 having conductivity through
On the lower surface of the annular holding body 12,
It is fixed to the fixed shaft 13 which penetrates 12 through the insulating plate 19.
Connect the other lead wire 10 directly to the terminal plate 20
When the housing 2 is molded, the other lead wires 10 are
A lead wire 9 directly connected to the outer periphery of the annular holder 12;
Both are integrally molded with insulating synthetic resin . Therefore,
Others directly connected to the center terminal 14 via the terminal board 20
The lead wire 10 holds an annular shape when molding the housing 2.
Insulative with lead wire 9 directly connected to the outer circumference of body 12
Since it is integrally molded with the synthetic resin of
Easy to lead wires 9 and 10 with respect to the center pin 14 in an insulated state
Can be connected to the flight, each lead wire is taken out to the outside
Therefore, the connection work with the power line becomes easy.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings and FIGS. FIG. 1 is a sectional view of a lamp socket according to an embodiment of the present invention, and FIG.
Is a cross-sectional view of the annular holder, and FIG. 3 is a plan view of the annular holder.

The lamp socket of the present invention is designated as 1. The lamp socket 1 is integrally molded as a housing 2 with an insulating synthetic resin, and a female screw is formed on an inner peripheral wall of the lamp 3 to mount a base portion 4 serving as a peripheral electrode of a lamp 3 having a screw portion 5 formed on the outer periphery. An opening 2a having a portion 6 formed therein is provided, and in the opening 2a, a peripheral terminal 15 that contacts the periphery of the base 4 and a center terminal 14 that contacts the center electrode at the center of the end of the base 4 are provided. It is arranged.

Further, as shown in FIG. 2, the housing 2 has an opening 2a for shortening the entire length of the housing 2.
The length of the female screw portion 6 formed on the inner peripheral wall of the lamp is shorter than the entire length of the screw portion 5 of the lamp 3.

The terminal member 8 is provided on the bottom surface of the opening 2a.
The terminal member 8 is composed of a pair of a metal-made annular holding body 12 which is mainly conductive and a peripheral terminal 15 which is erected upright on an inner peripheral wall of the annular holding body 12 facing each other. Band-shaped side contact pieces 15a, 15 having restoring elasticity
b and the center of the inside of the annular holding body 12, the side contact piece 15
Center terminal 1 held in an electrically insulated state from a and 15b
It is composed of four.

More specifically, the side contact pieces 15a, 15b, which are electrical conductors, have a hole formed in the center of the strip for inserting the fixed shaft 13, and are bent up on both sides in a U-shape.
The tips are formed as contacts 16a, 16b that contact the peripheral edge of the base of the lamp 3.

The annular holder 12 is formed in the shape of a metal cup having conductivity, and is arranged on the lower surface of the annular holder 12 via a disk-shaped insulating plate 19 made of, for example, Bakelite. Terminal plate 20 and annular holder 12
The side contact pieces 15a, 15b interposed inside the inner side of the center terminal 14 bent in the shape of an inverted "T" arranged via an insulating plate 18 made of bakelite in the shape of a disk, Both ends of the fixed shaft 13 penetrating these are fixed by crimping.

One end of a lead wire 9 is fixed to the terminal plate 20 fixed to one end of the fixed shaft 13 by solder F1, and another lead wire 10 is attached to a predetermined side surface of the annular holder 12.
Has one end fixed by solder F2.

Next, the operation of the lamp socket constructed as above will be described.

First, the lamp 3 is attached to the opening 2a of the housing 2.
At the time of mounting, the screw portion 5 serving as a peripheral electrode on the outer periphery of the lamp base portion 4 is screwed to the female screw portion 6 of the housing 2 integrally molded as a housing with an insulating synthetic resin.

In the screwed lamp 3, the center electrode 7 at the end of the base portion 4 comes into contact with the center terminal 14 held in the center of the annular holder 12 on the inner bottom surface of the opening 2a of the housing 2, and the peripheral electrodes The peripheral edge part of the mouthpiece part 4, which is a part, elastically presses the contactors 16a, 16b of the side contact pieces 15a, 15b having the restoring elasticity held upright inside the annular holder 12 in a pressed state. To do.

In this way, when the base portion 4 of the lamp 3 is screwed into the opening 2a of the housing 2, the opening 2a of the housing 2 is integrally made of an insulating synthetic resin so as to have a size satisfying the electrical standard. Since it is molded, the risk of electric shock is eliminated and safety is obtained.

Further, in the state where the total length of the lamp socket is shortened, the screw portion 5 of the lamp 3 can be held in a stable state even when screwed into the shortened female screw portion 6, and the lamp mounted in the housing 2 can be held. 3 is a center electrode 7 at the end of the base 4
And the center terminal 14 in the housing 2 come into contact with each other, and the end peripheral edge of the base portion 4 which is a part of the peripheral electrode presses the contactors 16a and 16b at the tips of the side contact pieces 15a and 15b to elastically move outward. Since they come into contact with each other in a deformed state, the contact between the terminals becomes good.

Furthermore, the total length of the lamp socket is shortened and downsized, so that the amount of synthetic resin used can be reduced.

Since the terminals inside the housing 2 are directly connected to the lead wires 9 and 10 in an insulated state by caulking or soldering, the lead wires 9 and 10 are connected to each other.
Side contact piece 15 of the annular holder 12 of the lamp socket
The contactability with a, 15b and the center terminal 14 is improved.

[0023]

The present invention has the following effects.

As described above in detail, according to the invention of claim 1 of the present application, when the base portion of the lamp is screwed into the opening of the lamp socket, the opening of the lamp socket is integrally molded with an insulating synthetic resin. because they are, of course have a safety even in a state having a reduced lamp socket entire length, it is possible to hold the screw portion of the lamp is screwed into the female screw portion that is shortened in stable condition, the lamp In the lamp mounted in the socket, the center electrode and the center terminal are in contact with each other, and the contact state between the end peripheral edge of the base part, which is a part of the peripheral electrode, and the peripheral terminal standingly held by the annular holder is improved. Can be kept. Also, when the peripheral edge of the end of the mouthpiece contacts the contact
The outward displacement of the pair of side contact pieces
Since it is regulated by the inner peripheral wall that faces the
Repeating strength of the side contact piece is maintained and the mouthpiece part
The state of contact with the peripheral edge of the end portion can be kept even better.

[0025] According to the invention of claim 2 wherein, the center
The lead wire directly connected to the terminal through the terminal board
For example, by soldering on the outer circumference of the annular holder when molding
Insulating synthetic resin together with another lead wire directly connected
As it is molded integrally, it can be
You can easily connect the lead wires in an insulated state, and
Since the lead wire is taken out of the housing,
Wiring work becomes easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a lamp socket according to an embodiment of the present invention.

FIG. 2 is a sectional view of an annular holder.

FIG. 3 is a plan view of an annular holder.

FIG. 4 is an explanatory diagram of a test example based on electrical standards.

FIG. 5 is an explanatory view of a conventional lamp socket.

[Explanation of symbols]

1 lamp socket 2 housing 2a opening 3 lamps 4 Base part (peripheral electrode) 5 screw part 6 Female thread 7 Center electrode 8 terminal members 9, 10 lead wire 12 annular holder 13 fixed axis 14 Center terminal 15 peripheral terminals 15a, 15b Side contact piece 16a, 16b Contact 18, 19 Insulation plate 20 terminal board F1, F2 solder H total length

Claims (2)

(57) [Claims] 1. An opening 2a for mounting a base portion 4 which forms a peripheral electrode of a lamp 3 having a screw portion 5 formed on the outer periphery is formed, and a periphery which contacts the periphery of the base portion 4 of the lamp 3 is formed in the opening 2a. the terminal 15, the lamp socket 1 with a central pin 14 in contact with the central electrode 7 of the base 4 end center
In the lamp socket 1, a female screw portion 6 shorter than the entire length of the screw portion 5 of the lamp 3 is formed on the inner peripheral wall of the opening 2a, and a terminal member 8 is arranged on the inner bottom surface of the opening 2a to insulate them. integrally molded as a housing 2 of a synthetic resin, the terminal member 8 is cup-shaped with metals having conductivity
The lead wire 9 is directly attached to the outer periphery of the annular holder 12 formed on
It is connected to the annular holder 12, contactable to the periphery ferrule portion 4 circumferential edge of the lamp 3 to be attached to the opening 2a
With side terminals 15 are erected held, the central terminal 14 is made is retained at the center of the annular holder 12 in an insulated state with respect to the peripheral terminal 15, the peripheral terminal 15 is bent in a U-shape Both tips started up
Contacting the lower part of the periphery of the base part 4 of the lamp 3
16a, 16b forming a pair of die with resilience
The contact pieces 15a, 15b face the annular holder 12
The lamp socket is characterized by being held upright on the inner wall . 2. The center terminal 14 is one of the peripheral terminals 15 .
Fixed shaft 13 having conductivity in the upper middle part through an insulating plate 18
Is fixed to the lower surface of the annular holding body 12, and
The terminal plate 20 directly connected to the lead wire 10 of the
To the fixed shaft 13 penetrating the annular holding body 12 via 9
The lamp socket according to claim 1, which is fixed .