JPH07226272A - Socket for fluorescent lamp - Google Patents

Abstract

PURPOSE:To easily and surely connect a pin terminal electrically, which is inserted into a pin insertion hole of a socket, of a fluorescent lamp tube by guiding the terminal along the inside tilting wall face of a contactor which is formed into a funnel-like shape to insert into a through hole and bringing the terminal into plane-contact with the inner circumference of the through hole. CONSTITUTION:Pin receiving bodies 12 of a front part of a socket main body 11 have pin insertion holes 13, 13 and are pressed by conductive springs 15, 15 so as to be projected optionally by a prescribed distance. Through holes 17 to insert pin terminals 19 of a fluorescent lamp tube 7 air-tightly are formed in the bottom parts of contactors 14. The contactors 14 put in the rear sides of respective holes 13 are pressed to the pin receiving bodies 12 by the conductive springs 15 fixed in the front ends and at the same time the contactors 14 are brought into contact with connection terminals 16 in the rear end parts to connect them electrically. When pin terminals 9, 9 of a metal cap 8 of the tube 7 are inserted into the holes 13, 13 of the pin receiving bodies 12, each terminal 9 is guided along the inner tilting face of each contactor 14, inserted into a hole 17, and brought into plane-contact with the inner circumference of the hole 17. As a result, electric connection is conducted easily and surely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp socket, and more particularly to a fluorescent lamp socket suitable for a fluorescent lamp tube used in a lighting device for an illuminated signboard.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, in a socket of a fluorescent lamp, a pin receiver 2 having a pair of pin insertion holes 3, 3 penetrating a front portion of a cylindrical socket body 1 is predetermined. The contactor 4 which is fitted so as to be able to be pulled in and out for a distance and arranged so as to close the pin insertion hole 3 behind each pin insertion hole 3 is pressed against the pin receiving body 2 by the conductive spring 5 incorporated in the socket body 1. Is biased by the conductive spring 5
Is electrically connected to the connection terminal 6 of the lead wire (not shown). The pin receiver 2 may be of a movable type or a fixed type integrally formed with the socket body 1 as shown in the figure.

Further, the contactor 4 is made of a flat conductive metal disk, and a pair of pin terminals 9 and 9 projecting from the bases 8 at both ends of the fluorescent lamp 7 are inserted into the pin insertion holes 3 and 3. , 4 are brought into contact with the contacts 4 and 4 to be electrically connected. That is, the pin terminals 9, 9 of the fluorescent lamp tube 7 are electrically connected to the contacts 4, 4 only by point contact.

On the other hand, in a fluorescent lamp used for an illuminated signboard, a large number of fluorescent lamp tubes are often arranged and mounted in a signboard lighting device, and the signboard itself is installed outdoors at a high place. Therefore, it is not easy to replace the fluorescent lamp after installation.

[0005]

However, in the above-described conventional fluorescent lamp socket, since the pin terminals 9 of the fluorescent lamp tube 7 are only in point contact with the contacts 4, a large number of fluorescent lamps are required. There is a possibility that foreign matter may adhere to the tip of the pin terminal 9 during the tube mounting work, resulting in poor contact. Further, after the signboard is installed, there is a problem that the signboard is apt to vibrate due to wind and rain and contact failure of the pin terminals 9 is caused, and in that case, replacement work of the fluorescent lamp requires a great deal of labor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of conventional sockets and provide a fluorescent lamp socket capable of electrically and securely connecting pin terminals of a fluorescent lamp tube to contacts of the socket. It is in.

[0007]

To achieve the above object, according to the present invention, a pair of pin insertion holes are formed through a pin receiving body provided in the front portion of a cylindrical socket body, and the pin insertion holes are provided. A contact arranged on the rear side so as to close the pin insertion hole is urged to be pressed against the pin receiver by a conductive spring provided in the socket body,
In a fluorescent lamp socket in which the conductive spring is electrically connected to a connecting terminal of a lead wire, the contact is a transparent member for inserting the pin terminal of the fluorescent lamp into the conductive metal plate in a tightly fitted state. It is preferable that the contactor formed by forming a hole is formed by forming a conductive metal plate into a funnel shape and providing the through hole at the bottom thereof.

[0008]

With the above structure, the pin terminal of the fluorescent lamp tube inserted into the pin insertion hole of the socket is inserted into the through hole of the contactor, and is in surface contact with the inner peripheral edge portion of the through hole to be electrically connected. To be done. Further, when the contactor is formed in a funnel shape, the pin terminal is guided along the inner inclined wall surface of the contactor, and is easily and surely inserted into the through hole.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a fluorescent lamp socket 10 according to the present invention.
The socket body 11 and the pin receiving body 12 have the same structure as the conventional socket shown in FIG. 3, and the pin receiving body has a pair of pin insertion holes 13 and 13 penetrating therethrough. It is assembled in a movable state so that it can be taken in and out for a predetermined distance with respect to 11, and is urged freely by the conductive springs 15, 15 fitted in the socket body 11.

The contactor 14 is formed by pressing a conductive metal plate such as a phosphor bronze plate into a funnel shape, and a through hole 17 through which the pin terminal 9 of the fluorescent lamp 7 is inserted in a tight fit state at the bottom thereof.
Is provided. The contactor 14 is fitted to the front end portion of the conductive spring 15 and disposed behind the pin insertion holes 13 so as to close the pin insertion holes 13. Being pressed against. On the other hand, the rear end of the conductive spring 15 contacts the connection terminal 16 mounted on the socket body 11 to be electrically connected. Then, a lead wire (not shown) is connected to the connection terminal 16.

The socket 10 having the above structure
Is inserted into the pin insertion holes 13 of the pin receiver 12 by inserting the pin terminals 9 and 9 projecting from both ends of the fluorescent lamp tube 7, the respective pin terminals 9 inside the funnel-shaped contactor 14. By being guided by the inclined surface and easily and surely inserted into the through hole 17, the through hole 1
7 is in surface contact with the inner peripheral edge portion of 7 to be electrically connected.

FIG. 2 shows an example in which the present invention is applied to a fixed-type fluorescent lamp socket 20, and the point that the pin receiver 12 is formed integrally with the socket body 11 is shown in FIG. It is different from the movable socket 10. Also, the contact 24
Is formed of a flat conductive metal plate, and a through hole 17 is provided in the center thereof. Also in this case, the pin terminal 9 of the fluorescent lamp tube 7 is inserted into the through hole 17 and comes into surface contact with the inner peripheral edge portion thereof to be electrically connected.

[0014]

As described above, according to the present invention,
It has a simple structure in which a contact made of a conductive metal plate is simply provided with a through hole through which the pin terminal of the fluorescent lamp is inserted in a tightly fitted state. , There is no risk of contact failure during the installation work of the fluorescent lamp, and a good connection state is maintained even after installation.

According to the second aspect of the present invention, the contactor is formed in a funnel shape, and the inner inclined surface of the contactor can guide the pin terminal to be easily and surely inserted into the through hole. This is advantageous.

The socket of the present invention can be used not only for fluorescent lamp tubes for electric signs, but also for ordinary fluorescent lamp tubes for illumination.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an example in which the present invention is applied to a movable fluorescent lamp socket.

FIG. 2 is a vertical sectional front view showing an example in which the present invention is applied to a fixed-type fluorescent lamp socket.

FIG. 3 is a vertical sectional front view showing a conventional movable fluorescent lamp socket.

[Explanation of symbols]

 10 Movable Fluorescent Lamp Socket 11 Socket Main Body 12 Pin Receptor 13 Pin Insertion Hole 14, 24 Contact 15 Conductive Spring 16 Connection Terminal 17 Through Hole 20 Fixed Fluorescent Lamp Socket

Claims (4)

[Claims] 1. A contact formed by penetrating a pair of pin insertion holes through a pin receiver provided in a front portion of a cylindrical socket body, the contacts being arranged behind the pin insertion holes so as to close the pin insertion holes. The child is biased to be pressed against the pin receiver by a conductive spring embedded in the socket body,
In a fluorescent lamp socket in which the conductive spring is electrically connected to a connection terminal of a lead wire, the contactor is a transparent metal plate in which a pin terminal of a fluorescent lamp is inserted into a conductive metal plate in a tightly fitted state. A socket for a fluorescent lamp, characterized by being formed with a hole. 2. The socket for a fluorescent lamp according to claim 1, wherein the contactor is formed by forming a conductive metal plate into a funnel shape and providing the through hole at the bottom thereof. 3. The fluorescent lamp socket according to claim 1, wherein the pin receiver is formed separately from the socket main body, and is attached to the socket main body so that the pin receiver can be inserted into and removed from the socket main body by a predetermined distance. . 4. The fluorescent lamp socket according to claim 1, wherein the pin receiver is formed integrally with the socket body.