JPH10326661A - Lamp socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily prevent the shortage of insulating distance or grounding caused by the shifting of an insulating cover by holding a lamp pin between a movable side contact piece and a fixed side contact piece and pulling out a lead wire connected to a contact terminal in a side opposite the contact terminal of the fixed side contact piece. SOLUTION: A contact 2 is arranged in the vicinity of a lamp pin inserting part 5 in a socket main body 1, and a fixed side contact piece 7 and a movable side contact piece 8 are integrally provided for holding both side faces of a lamp pin inserted into the lamp pin inserting part 5. A plate-like contact terminal 9 is extended from the lamp pin inserting part 5 of the fixed side contact piece 7 at a right angle. The dimension of an internal space 11 in a direction for inserting the lamp pin, which is surrounded with the socket main body 1 and an insulating cover 4, is set nearly equal to that of the fixed side contact piece 7 in an inserting direction. That is, the fixed side contact piece 7 is set to be a dimension slightly shorter than the internal space 11. The insulating cover 4 has a lead inserting part 17 for inserting a lead wire 3, and it is attached to the socket main body 1 for cover the contact 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp socket applied to a lighting fixture for an emergency light and the like.

[0002]

2. Description of the Related Art FIG. 8 shows a first conventional example. In this lamp socket, a lamp pin (not shown) is connected to a movable terminal plate 1.
00 and the fixed terminal plate 101
The contact force is obtained by the coil spring 102 that presses 00. 104 is a socket body.

FIGS. 9 and 10 show a second conventional example.
The lamp socket of this halogen lamp is
Is the one-sided contact of the lamp pin 106, and the coil spring 10
It is energized by 2. 108 is a lead wire, and 109 is a lamp base. FIGS. 14 and 15 show a third conventional example. This lamp socket is made of a conductive and elastic metal plate 1.
10 is bent into a U-shape, and a pin insertion opening 111 is formed at the center thereof. By inserting the lamp pin 106 into the pin insertion opening 111, the lamp pin 106 is inserted.
Between both sides.

[0004]

In the first prior art, since the side surfaces of the lamp pin are sandwiched on both sides and urged by the coil spring 102, the power supply performance is excellent, but the number of parts is large.
Further, since the coil spring 102 is incorporated while being compressed, workability is poor and cost is increased. The second conventional example has a simpler structure and can be manufactured at a lower cost than the first conventional example. However, when the coil spring 102 is inclined and incorporated as shown in FIG. A pressing force is generated against the insulating cover 104a, and the upper and lower ends of the contact 105 are rubbed against the socket body 104 or the insulating cover 104a by this force, so that the contact force with the lamp pin 106 is reduced, and the contact tends to be unstable. Also, the coil spring 102
Is small, is compressed during installation, and is fitted into the space between the socket body 104 and the contact 105, so that it is difficult to handle and takes time, and the price rebounds. When the lead wire 108 is pulled outward as shown in FIG.
Is not smoothly moved due to being twisted by the socket body 104 or the like, and thus the contact with the lamp pin 106 is likely to be unstable.
Further, when the lead wire 108 repeatedly receives a tensile force or a bending force, the insulating coating 108a of the lead wire 108
As shown in FIG. 3, the conductor is shifted outward and comes close to the mounting plate 113, and the insulation distance may be insufficient or a ground fault may occur.

[0005] The third conventional example is a double-ended spring,
It cannot be made large and small, and requires a lot of materials, so it is expensive. Accordingly, an object of the present invention is to provide a lamp socket that can be sandwiched on both sides without the need for a coil spring, is small and inexpensive, and can easily prevent shortage of insulation distance of a lead wire and ground fault. is there.

[0006]

According to a first aspect of the present invention, there is provided a lamp socket, comprising: a socket body having a lamp pin insertion portion;
A fixed contact piece and a movable contact piece which are arranged in the vicinity of the lamp pin insertion portion in the socket body and sandwich both side surfaces of the lamp pin inserted through the lamp pin insertion portion are integrally formed, and the fixed contact piece is A contact having a plate-like contact terminal extending substantially at a right angle from the lamp pin insertion portion side, and being connected to a surface of the contact terminal facing the fixed contact piece and pulled out in the same direction as the lamp pin insertion direction. A lead wire; and the insulating cover, which has a lead wire insertion portion through which the lead wire is inserted, is attached to the socket body and covers the contact.

According to the lamp socket of the first aspect,
Since the lamp pin is sandwiched between the movable contact piece and the fixed contact piece, it can be made compact and inexpensive without the need for a coil spring, and the lead wire connected to the contact terminal is opposite to the contact terminal of the fixed contact piece. Side, the distance between the connecting part of the lead wire and the lead wire insertion part of the insulating cover can be sufficient, so that even if a tensile force or a bending force is applied to the lead wire, the insulation coating is displaced. Insufficient insulation distance or ground fault can be easily prevented. Further, since the contact terminal extends from the fixed contact piece, the distance between the fixed contact piece and the lead wire connecting portion is short, and the contact resistance and the conductor resistance can be reduced.

According to a second aspect of the present invention, there is provided the lamp socket according to the first aspect, wherein the dimension of the internal space surrounded by the socket body and the insulating cover in the insertion direction of the lamp pin and the dimension of the fixed-side contact piece in the insertion direction. And the dimension of the movable contact piece in the insertion direction of the lamp pin is shorter than the dimension of the fixed contact piece in the insertion direction.

According to the lamp socket of the second aspect,
In addition to the effects of the first aspect, the positioning of the fixed-side contact piece in the socket body is facilitated, and the movable-side contact piece is shorter than the fixed-side contact piece, so that it can easily move without hitting the socket body or the insulating cover, Since the contact force with the lamp pin works unnecessarily, the contact is stable. According to a third aspect of the present invention, in the lamp socket according to the first or second aspect, the movable contact piece is connected to the contact terminal through a substantially U-shaped bent portion, and protrudes inside the bent portion. The positioning projection is provided on the socket body or the insulating cover.

According to the lamp socket of the third aspect,
In addition to the effects of the first and second aspects, the contact can be positioned in the socket main body, and the inclination and rattling of the contact can be regulated, so that the assembling work becomes easy and the processing cost is reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. That is, the lamp socket includes a socket body 1, a contact 2, a lead wire 3,
And an insulating cover 4. The socket main body 1 has a lamp pin insertion portion 5, and the socket main body 1 of the embodiment is in a cylindrical shape with a pair of lamp pin insertion portions 5 formed by holes at the center of the top portion. One of the lamp pin insertion portions 5 is a long hole elongated in the arrangement direction. A mounting portion 6 having rivet holes on both sides of the lamp pin insertion portion 5.
Is formed.

The contact 2 is disposed in the vicinity of the lamp pin insertion portion 5 in the socket body 1, and fixedly contacts the movable pin on both sides of the lamp pin 10 inserted into the lamp pin insertion portion 5. 8 as well as
It has a plate-like contact terminal 9 extending substantially at right angles from the lamp pin insertion portion 5 side of the fixed contact piece 7. In this case, the dimension in the insertion direction of the lamp pin 10 in the internal space 11 surrounded by the socket body 1 and the insulating cover 4 is substantially equal to the dimension in the insertion direction of the fixed contact piece 7. That is, the fixed-side contact piece 7 is slightly shorter than the internal space 11. The dimension of the movable contact piece 8 in the insertion direction of the lamp pin 10 is shorter than the dimension of the fixed contact piece 7 in the insertion direction. The movable contact piece 8 is connected to the contact terminal 9 through a substantially U-shaped bent portion 12 that imparts elasticity, and a positioning protrusion 13 projecting inside the bent portion 12 is provided on the socket body 1. Provided. That is, the protrusion 13 is slightly smaller than the inside dimension of the bent portion 12.

In the embodiment, as shown in FIG. 5, a contact terminal 9 is bent at the upper end of the fixed contact piece 8, and a fold is formed at the edge of the contact terminal 9 opposite to the fixed contact piece 8. One side of the bent portion 12 is bent, the movable contact piece 7 is connected to the other end of the bent portion 12, and the lamp pin introduction portion 14 is bent on the movable contact piece 7. In addition, a concave portion 15 is provided in a side portion of the bent portion 12 to allow the insulating coating 3a of the lead wire 3 to escape. Then, the contact terminal 9 is fitted into and abutted on the inner bottom of the socket body 1 to position the contactor 2 so that it is hardly inclined and stable. Also, a continuous portion 12 between the bent portion 12 of the movable contact piece 7 and the contact terminal 9.
a supporting surface 1 having a surface protruding from the inner wall surface of socket body 1
The contact 2 is positioned by bringing it into wide contact with the contact 1a, and the contact 2 is stabilized.

The lead wire 3 is connected to the surface of the contact terminal 9 facing the fixed contact piece 8, and is drawn out in the same direction as the lamp pin insertion direction. In the embodiment, the end of the lead wire 3 is bent and abuts on the connection portion 3b on the surface of the contact terminal 9, and is connected by welding such as spot welding. In this case, when the lead wire 3 is connected, the insulating coating 3a is fitted into the concave portion 15 as shown in FIGS. 6 and 7, and the distal end comes into contact with the continuous bent portion between the fixed contact piece 8 and the contact terminal 9. So that even if the lead wire 3 is too long or misaligned, the lamp pin 10 is not obstructed, and after welding, the lead wire 3 is bent about 90 degrees in the direction of the arrow to insert the lamp pin 10 in the insertion direction. Parallel to Therefore,
The welded part of the lead wire 3 is arranged at a position deep from the opening side of the socket body 1.

The insulating cover 4 has a lead wire insertion portion 17 through which the lead wire 3 is inserted, and is attached to the socket body 1 to cover the contact 9. In the embodiment, the opening of the socket body 1 is closed, and has a hole that matches the rivet hole of the mounting portion 6 and is connected by a mounting tool 18 using rivets. The socket body 1 has the insulating cover 4 mounted on the mounting plate 19 and the lamp socket mounted on the mounting plate 19. In addition, an insertion hole 20 through which the lead wire 3 is inserted is formed in the mounting plate 19, and a projection 2 that presses a continuous portion 12 a of the bent portion 12 with the contact terminal 9 toward the bottom of the socket body 1.
1 is provided.

The assembly of the lamp socket will be described. The socket body 1 is placed upside down from FIG. 1, the contact terminals 9 are fitted to the inner bottom of the socket body 1, the projecting portion 13 is passed through the inside of the bent portion 12, and the continuous portion 12 a is connected to the support surface 11 a. The contact 2 is positioned on the inner wall surface of the socket body 1 as shown in FIG. The opening of the socket body 1 is covered with an insulating cover 4 and connected with a connecting member 18. At this time, the protrusion 21 positions the opening side edge of the continuous portion 12 a, and positions the fixed contact piece 8 on the inner surface of the insulating cover 4.

In FIG. 3, reference numeral 30 denotes the internal space 11.
In FIG. 4B, reference numeral 25 denotes a halogen lamp mounted on the lamp socket. According to this embodiment, since the lamp pin 10 is sandwiched between the movable contact piece 7 and the fixed contact piece 8, it can be made small and inexpensive without the need for a coil spring as in the prior art, and the contact terminal 9 to the fixed contact piece 8.
Of the lead wire 3
Since the distance between the connecting portion 3b and the lead wire insertion portion 17 of the insulating cover 4 can be sufficiently secured, even if a tensile force and a bending force are applied to the lead wire 3, the insulation distance due to the displacement of the insulating coating 3a can be reduced. Shortage or ground fault can be easily prevented. Further, since the contact terminal 9 extends from the fixed contact piece 8, the distance between the fixed contact piece 8 and the lead wire connecting portion 3b is short, and the contact resistance and the conductor resistance can be reduced.

For example, in the case of an emergency lamp that uses a battery to light a lamp, since the voltage is low, the voltage drop due to the conductor causes a decrease in luminous flux, which is a problem, but this structure is a solution. In addition, the positioning of the fixed-side contact piece 8 in the socket body 1 is facilitated, and the movable-side contact piece 7 is shorter than the fixed-side contact piece 8, so that the socket body 1 and the insulating cover 4 are formed.
And the contact is stable because the contact force with the lamp pin 10 works without waste.

Furthermore, since the contact 2 can be positioned in the socket body 1 and the inclination and rattling of the contact 2 can be regulated, the assembling work becomes easy and the processing cost is reduced. Since the inclination and rattling of the contact terminal 9 can be regulated by the support surface 11a of the inner wall of the socket body 1 and the protrusion 13, the assembling work becomes easy and the processing cost is reduced.

The projection 12 may be provided on the insulating cover 4 side.

[0021]

According to the first aspect of the present invention, since the lamp pin is sandwiched between the movable contact piece and the fixed contact piece, the lamp socket can be made compact and inexpensive without the need for a coil spring. Since the lead wire connected to the terminal is pulled out to the opposite side of the fixed contact piece from the contact terminal, the distance between the connection part of the lead wire and the lead wire insertion part of the insulating cover can be sufficient, Even if a tensile force and a bending force are applied to the lead wire, shortage of insulation distance or ground fault due to displacement of the insulation coating can be easily prevented.
Further, since the contact terminal extends from the fixed contact piece, the distance between the fixed contact piece and the lead wire connecting portion is short, and the contact resistance and the conductor resistance can be reduced.

According to the lamp socket of the second aspect,
In addition to the effects of the first aspect, the positioning of the fixed-side contact piece in the socket body is facilitated, and the movable-side contact piece is shorter than the fixed-side contact piece, so that it can easily move without hitting the socket body or the insulating cover, Since the contact force with the lamp pin works unnecessarily, the contact is stable. According to the lamp socket of the third aspect, in addition to the effects of the first and second aspects, the contact can be positioned in the socket main body, and the inclination and rattling of the contact can be regulated, so that the assembling work is easy. In other words, the processing cost is reduced.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention in an attached state.

FIG. 2 is an external perspective view.

FIG. 3 is a bottom view of the socket body with the insulating cover removed, as viewed from the opening side.

FIG. 4 is a plan view (a), a front view (b), and a cutaway side view (c) of a lamp socket.

FIG. 5 is a perspective view of a contact.

FIG. 6 is a perspective view illustrating connection of lead wires.

FIG. 7 is a partial perspective view showing a state where a protruding portion is located inside a bent portion.

FIG. 8 is a partial sectional view of a first conventional example.

FIG. 9 is a half sectional side view of a second conventional example.

FIG. 10 is a perspective view illustrating the contact of the lamp pin.

FIG. 11 is an explanatory view of a state in which the coil spring is inserted obliquely.

FIG. 12 is an explanatory diagram of a state where a lead wire is drawn.

FIG. 13 is an explanatory diagram of a state where an insulating coating of a lead wire is shifted outward.

FIG. 14 is a perspective view of a contact according to a third conventional example.

FIG. 15 is a perspective view showing a state where the contact is mounted on a socket body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket main body 2 Contact 3 Lead wire 4 Insulation cover 5 Lamp pin insertion part 7 Fixed side contact piece 8 Movable side contact piece 9 Contact terminal 10 Lamp pin 11 Internal space 12 Bend part 13 Projection

Continued on the front page (72) Inventor Tomohiro Hatori 1-55 Yoshida Shimojima, Higashi-Osaka City, Osaka Asahi National Lighting Co., Ltd. (72) Inventor Tomoyuki Ono 1-55 Yoshida Shimojima, Higashi-Osaka City, Osaka Asahi Na Shonal Lighting Co., Ltd.

Claims (3)

[Claims] 1. A socket body having a lamp pin insertion portion, a fixed contact piece disposed in the vicinity of the lamp pin insertion portion in the socket body and holding both side surfaces of a lamp pin inserted through the lamp pin insertion portion, and a movable member. A contact having a plate-shaped contact terminal extending substantially at a right angle from the lamp pin insertion portion of the fixed contact and integrally having a side contact; and a surface of the contact terminal facing the fixed contact. And a lead wire drawn out in the same direction as the lamp pin insertion direction, and the insulating cover having a lead wire insertion portion for inserting the lead wire and being attached to the socket body and covering the contact. Lamp socket. 2. A method according to claim 1, wherein the dimension of the lamp pin in the insertion direction of the internal space surrounded by the socket body and the insulating cover is substantially equal to the dimension of the fixed contact piece in the insertion direction. The lamp socket according to claim 1, wherein a dimension of the fixed side contact piece in the insertion direction is shorter than a dimension of the fixed side contact piece in the insertion direction. 3. The movable contact piece is connected to the contact terminal through a substantially U-shaped bent portion, and a positioning protrusion protruding inside the bent portion is provided on the socket body or the insulating cover. The lamp socket according to claim 1 or 2, wherein