JPH0963728A - Single base fluorescent lamp socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a contact stability between a conductive terminal and a lamp pin, and downsize a single base fluorescent lamp socket by providing an elastic piece elastically making contact with a single side surface of the lamp pin on the conductive terminal. SOLUTION: An elastic conductive terminal 2 has an elastic piece 2c making contact with a single side surface of the lamp pin 5b of a single base fluorescent lamp 5. The bottom part of a base 5a of the single base fluorescent lamp 5 is turned to the recessed part 1a side of a socket body 1 of the single base fluorescent lamp 5, and an engaging projection 5c formed on the base 5a is fitted and inserted to the guide groove 1c of the recessed part 1a. The single base fluorescent lamp 5 is rotated by a prescribed angle around an axis substantially parallel to the inserting direction. Just before a finish of the rotation, the elastic piece 2c of a lamp terminal part 2b of the conductive terminal 2 elastically makes contact from the inner side surface which is a single side surface of a lamp pin 5b to provide an electric continuity. Thus, the lamp terminal 2b never makes point contact with the lamp pin 5b, and the possibility of causing a contact failure is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single base fluorescent lamp socket.

[0002]

2. Description of the Related Art FIGS.
1 shows a structure of a conventional single-ended fluorescent lamp socket and a conductive terminal thereof (first conventional example) disclosed in Japanese Patent No. 586, wherein the single-ended fluorescent lamp socket includes a socket body 1;
The conductive terminal 2, the cover 3, and the coil spring 4 are provided. Then, the one-end cap fluorescent lamp 5 having the cap 5a at one end, four lamp pins 5b provided on the bottom surface of the cap 5a, and two engaging projections 5c provided on the peripheral side wall of the cap 5a is mounted. Is formed.

The socket body 1 is made of an insulating material, and has a recess 1a on the front side for accommodating the base 5a of the single-base fluorescent lamp 5, and the lamp pin 5b is inserted into the bottom of the recess 1a. Four elongated hole-shaped lamp pin insertion holes 1b are provided, and the engaging projections 5c of the single-base fluorescent lamp 5 are guided on the side wall of the recess 1a in the insertion direction of the base 5a, and the insertion direction is the central axis. Is provided with a guide groove 1c that guides it to rotate by a predetermined angle. Further, the conductive terminal housing 1
d is provided.

The conductive terminal 2 is made of a conductive material and has a power supply terminal portion 2a at one end to which the electric wire 6 is crimped, and has a disk-like shape with a diameter larger than the lamp pin insertion hole 1b which abuts the lamp pin 5b at the other end. The lamp terminal portion 2b is fixed. The four conductive terminals 2 are housed from the back side in the conductive terminal housing 1d of the socket body 1 so that the lamp terminal portions 2b respectively face the lamp pin insertion holes 1b.

The cover 3 is arranged so as to cover the back side of the socket body 1, has a wire insertion hole 3a into which the wire 6 is introduced, and is attached to the socket body 1 by a driving tack 7 or the like. ing. Also, the lamp terminal portion 2b
A coil spring 4 is provided on the back side of the socket body 1 and is elastically compressed between the back side of the bottom surface of the recess 1a of the socket body 1 and the cover 3 to connect the lamp terminal portion 2b to the lamp pin insertion hole 1b side. Is pressed against.

In the single-ended fluorescent lamp socket constructed as described above, the single-ended fluorescent lamp 5 is provided on the side of the recess 1a of the socket body 1.
The bottom part of the mouthpiece 5a is directed to the guide groove 1c of the recess 1a.
The engaging projection 5 formed on the base 5a of the single-base fluorescent lamp 5.
c together and insert, the tip of the lamp pin 5b is brought into contact with the lamp terminal portion 2b of the conductive terminal 2 substantially perpendicularly to establish electrical conduction, and further, an axis substantially parallel to the inserting direction is used as a central axis at a predetermined angle. If only rotated, the engaging projection 5c engages with the front surface side of the guide groove 1c of the socket body 1 to mount the single-base fluorescent lamp 5.

FIG. 12 shows the structure of a conventional fluorescent lamp socket disclosed in Japanese Utility Model Laid-Open No. 63-28203 and its conductive terminal (second conventional example). This fluorescent lamp socket is for mounting a straight tube fluorescent lamp having a G13 base, and the lamp terminal portions 2b of the conductive terminals 2 are substantially parallel to each other in the recess 1a provided in the socket body 1 in the vicinity of both ends. Are arranged so as to face each other. In addition, a cutout 1e into which a lamp pin is inserted is provided in communication with the recess 1a between a pair of lamp terminal portions 2b from one end side.

Two such fluorescent lamp sockets are always used as a set, and the two fluorescent lamp sockets are mounted with a predetermined interval so that the recesses 1a thereof face each other. Then, two lamp pins protruding from each end of the fluorescent lamp are inserted into the recess 1a through the notches 1e,
By rotating the fluorescent lamp about the axis of the fluorescent lamp, the lamp terminal portions 2 are respectively provided outside the two lamp pins.
b is abutted to establish conduction.

[0009]

However, in the single-ended fluorescent lamp socket shown in the first conventional example having such a structure, since the tip of the lamp pin 5b is in contact with the conductive terminal 2, the lamp pin The contact stability is easily influenced by the state of the tip of the lamp 5b, and in particular, when the tip of the lead-in wire connected to the electrode inside the single-ended fluorescent lamp 5 projects from the tip of the lamp pin 5b, poor contact occurs. There was a problem of fear.

Further, the fluorescent lamp socket shown in the second conventional example is for a straight tube type fluorescent lamp, and for holding the fluorescent lamp, the interval between the fluorescent lamp sockets and the frictional force between the lamp terminal portion 2b and the lamp pin. Therefore, it is necessary to secure a holding force at the conductive terminal 2 that is greater than the force required for contact with the lamp pin, and the conductive terminal 2 becomes large, so that the fluorescent lamp socket cannot be downsized. It was

The present invention has been made in view of the above problems, and an object of the present invention is to improve contact stability between a conductive terminal and a lamp pin and to provide a small-sized single-base fluorescent lamp socket.

[0012]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides the invention as set forth in claim 1 in which the base 5a of the single base fluorescent lamp 5 is on the front side of the socket body 1. On the surface facing the bottom surface, the lamp pin 5b of the single base fluorescent lamp 5
Is formed with four substantially arc-shaped lamp pin insertion holes 1b, and the conductive terminals 2 that come into contact with the lamp pins 5b are disposed inside the lamp pin insertion holes 1b. Insert the single base fluorescent lamp 5 in which four lamp pins are erected in the
In the single-ended fluorescent lamp socket for rotating and locking the shaft about an axis substantially parallel to the insertion direction, the conductive terminal 2
However, it has an elastic piece 2c which has elasticity and is in elastic contact with one side surface of the lamp pin 5b.

Further, in the invention according to claim 2, in the single base fluorescent lamp socket according to the first aspect, the elastic piece 2c is one side surface of the lamp pin 5b and the one base fluorescent lamp 5 is provided. It is characterized in that it is provided so as to abut on the rotation center side.

According to a third aspect of the present invention, in the single base fluorescent lamp socket according to the first aspect, the elastic piece 2c is one side surface of the lamp pin 5b and the single base fluorescent lamp 5 is provided. It is characterized in that it is provided so as to come into contact with the rotation end side at the time of mounting.

Further, in the invention according to claim 4, in the single base fluorescent lamp socket according to claim 1, the elastic piece 2c is one side surface of the lamp pin 5b and the single base fluorescent lamp 5 is provided. It is characterized in that it is provided so as to come into contact with the outer side of the rotation of.

[0016]

1 to 3 show a first embodiment of a single base fluorescent lamp socket of the present invention,
This single base fluorescent lamp socket is formed by including a socket body 1, a conductive terminal 2, a cover 3 and a push button 8. The base 5a is provided at one end, and the base 5a
Four lamp pins 5b are erected on the bottom of a and
It is formed so that a single-base fluorescent lamp 5 having two engaging projections 5c projecting from the peripheral side wall of the base 5a can be mounted.

The socket body 1 is made of an insulating material, and is provided with a recess 1a for accommodating the base 5a of the single-base fluorescent lamp 5 on the front side, and the lamp pin 5b is inserted into the bottom of the recess 1a. There are four substantially arc-shaped lamp pin insertion holes 1b. Further, on the opposing side walls of the recess 1a, the engaging projections 5c of the single-base fluorescent lamp 5 are guided in the insertion direction of the base 5a, and are guided so as to rotate at a predetermined angle with the insertion direction as the central axis in the back. Guide groove 1
c is provided, and further, a conductive terminal accommodating portion 1d is provided on the back side of the bottom surface of the recess 1a. Also, the recess 1
A through hole 1f penetrating the conductive terminal accommodating portion 1d is provided at a substantially central portion of the bottom surface of a.

The conductive terminal 2 is made of a conductive material such as an elastic copper alloy and has a power supply terminal portion 2a to which an electric wire is connected at one end thereof, and contacts the lamp pin 5b at the other end thereof for electrical conduction. The lamp terminal portion 2b that can be taken is integrally formed. That is, the power supply terminal portion 2a is connected to the conductive plate 2d.
One end side of the rising piece 2e is raised to form a rising piece 2e, a wire insertion opening (not shown) is provided in the vicinity of the base of the rising piece 2e, and the tip of the rising piece 2e faces one surface side of the conductive plate 2d. It is folded back to form a locking piece 2f, and the elasticity of the locking piece 2f locks the electric wire with the conductive plate 2d. Also,
The lamp terminal portion 2b is provided on the side opposite to the power supply terminal portion 2a of the conductive plate 2d, and from one side end perpendicular to the end portion on the opposite side of the end portion on which the power supply terminal portion 2a is provided, the conductive plate 2d is provided. It is formed by an elastic piece 2c that is bent in a direction opposite to the rising direction of the rising piece 2e which is the other surface side direction. Further, the conductive plate 2 is further attached to the tip of the elastic piece 2c.
A guide portion 2g is formed which is bent in the opposite direction to d and serves as a guide when the lamp pin 5b is rotationally inserted.

The cover 3 is made of an insulating material and is provided so as to cover the rear surface side of the socket body 1.
An electric wire insertion hole 3a into which the electric wire 6 is introduced is provided, and a locking claw 3d that is locked to the inner wall of the conductive terminal accommodating portion 1d is provided at the end.
Is provided.

The push button 8 is made of an insulating material and has a substantially columnar shape. One end of the push button 8 is in contact with the cover 3 and the coil spring 4 is disposed on the cover 3 side so that the push button 8 is located on the recess 1a side which is the front side. It is biased, and the other end projects into the recess 1a from the through hole 1f at the bottom of the recess 1a.

In the conductive terminal 2 constructed as described above, the lamp terminal 2b side is the recess 1a side and the power supply terminal 2a side is the cover 3 side, and the lamp pin insertion hole 1b rear surface side of the conductive terminal storage portion 1d. It is stored in. At this time, the conductive terminal 2 is located on the rotation end end side when the single-ended fluorescent lamp 5 is mounted in the single-ended fluorescent lamp socket, and the elastic piece 2c of the lamp terminal portion 2b has a substantially arc shape in plan view. The lamp pin insertion hole 1b is disposed inside the lamp pin insertion hole 1b so as to be located inside a center line of the lamp pin insertion hole 1b extending in the arcuate direction.
It is arranged in the vicinity of the end portion on the rotation end side when mounting the single-base fluorescent lamp 5 of b, and the electric wire insertion opening faces the electric wire insertion hole 3 a of the cover 3.

In the single-ended fluorescent lamp socket thus constructed, the single-ended fluorescent lamp 5 is provided on the side of the recess 1a of the socket body 1.
The bottom part of the mouthpiece 5a is directed to the guide groove 1c of the recess 1a.
The engaging projection 5 formed on the base 5a of the single-base fluorescent lamp 5.
c is inserted together, and the single-ended fluorescent lamp 5 is rotated by a predetermined angle about an axis substantially parallel to the insertion direction, the elastic piece 2c of the lamp terminal portion 2b of the conductive terminal 2 is immediately before the end of the rotation. The lamp pin 5b elastically abuts from one side surface, which is one side surface, to establish electrical conduction. At this time, the caulking portion of the lead wire to the electrode which is a side wall of the lamp pin 5b and is slightly concave for caulking is located on the outer side surface of the lamp pin 5b, as indicated by P in FIG. . In addition, the engaging projection 5c of the single-ended fluorescent lamp 5 is engaged with the front surface side of the guide groove 1c of the socket body 1 to allow the single-ended fluorescent lamp 5 to operate.
Is attached.

With such a configuration, in the single-base fluorescent lamp socket according to the present embodiment, the lamp terminal 2b of the conductive terminal 2 abuts from the inner side surface, which is one side surface of the lamp pin 5b, for electrical conduction. Since the tip of the lamp pin 5b does not come into contact with the lamp pin 5b, even if the lead wire connected to the electrode inside the single base fluorescent lamp 5 projects from the tip of the lamp pin 5b, the lamp terminal 2b and the lamp pin 5b does not form a point contact due to the protruding portion of the lead-in wire, and there is no possibility of contact failure, and stable contact can be obtained. Further, the lamp terminal 2b of the conductive terminal 2 is
Since the lamp pin 5b is brought into contact with the side of the lead-in wire where there is no caulking portion, more stable contact can be obtained. Further, since the conductive terminal 2 does not require a force more than the holding force necessary to keep in contact with the lamp pin 5b, the conductive terminal 2 is small in size, can use a small amount of material, and can be formed in a relatively simple shape to facilitate molding. This enables the single-ended fluorescent lamp socket to be small and inexpensive.

FIGS. 4 to 6 show a second embodiment of a single base fluorescent lamp socket of the present invention.
Is different from that of the first embodiment in that the elastic piece 2c of the lamp terminal portion 2b constituting the conductive terminal 2 is sandwiched between the elastic plate 2d and the elastic plate 2d.
The conductive terminal 2 is formed only on the side end on the side opposite to that of the embodiment of the present invention, and the conductive terminal 2 is inside the lamp pin insertion hole 1b having a substantially arc shape in a plan view, and the center line extending in the arc direction of the lamp pin insertion hole 1b. Is also a point arranged so as to be located outside,
Otherwise, the configuration is the same as that of the first embodiment.

With this structure, the single-ended fluorescent lamp socket according to the present embodiment has substantially the same effect as the single-ended fluorescent lamp socket according to the first embodiment, and the elastic piece 2c. Contacts the outer side surface of the lamp pin 5b, there is no risk of contact with other conductive terminals 2 or the like even if the elastic piece 2c is largely elastically deformed, and the amount of elastic deformation can be made large, with a slight dimensional accuracy. The contact can be stabilized even in a bad case.

FIGS. 7 to 9 show a third embodiment of a single base fluorescent lamp socket of the present invention.
The difference from the embodiment is that the elastic piece 2c of the lamp terminal portion 2b forming the conductive terminal 2 is formed in substantially the same plane as the conductive plate 2d so that the tip of the conductive plate 2d is corrugated.
The conductive terminal 2 is arranged so as to be located inside the lamp pin insertion hole 1b having a substantially arcuate shape in a plan view and on the rotation end side when the single-base fluorescent lamp 5 is attached. 1
The configuration is the same as that of the embodiment.

With this structure, the single-base fluorescent lamp socket according to the present embodiment has substantially the same effect as the single-base fluorescent lamp socket according to the first embodiment, and the single-base fluorescent lamp. Only when the lamp 5 is completely attached, the electric connection is established and the single-base fluorescent lamp 5 is turned on.

[0028]

With the above-mentioned structure, according to the present invention, the conductive terminal abuts from one side surface of the lamp pin so as to be electrically connected to the tip of the lamp pin. Does not abut, so even if the lead wire connected to the electrode inside the single-ended fluorescent lamp projects from the tip of the lamp pin, the lamp terminal and the lamp pin do not have point contact with the tip of the lead wire. Since there is no risk of contact failure, stable contact can be obtained. In addition, the conductive terminals do not require a force greater than the holding force required to keep in contact with the lamp pins, so they are small in size and require less material to be used. The single-ended fluorescent lamp socket can be made small and inexpensive.

Further, in addition to the effect of the invention described in claim 1, in the invention described in claim 2, the conductive terminal is brought into contact with the inner side surface from the center of rotation, which is one side surface of the lamp pin, so as to be electrically connected. Since the electrical continuity is established, the single-ended fluorescent lamp socket can be made smaller and less expensive.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, only when the single-ended fluorescent lamp is completely installed, conduction is established and the single-ended fluorescent lamp lights up. Therefore, it is possible to reduce the risk that the device will be used in a halfway mounted state.

According to the invention of claim 4, in addition to the effect of the invention of claim 1, since the elastic piece comes into contact with the outer side surface which is one side surface of the lamp pin, the elastic piece is largely elastically deformed. However, there is no risk of contact with other conductive terminals, the amount of elastic deformation can be increased, and contact can be stabilized even if the dimensional accuracy is somewhat poor.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a single base fluorescent lamp socket of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a perspective view showing a conductive terminal of the above.

FIG. 4 is a plan view showing a second embodiment of a single base fluorescent lamp socket of the present invention.

FIG. 5 is an exploded perspective view of the above.

FIG. 6 is a perspective view showing a conductive terminal of the above.

FIG. 7 is a plan view showing a third embodiment of a single base fluorescent lamp socket of the present invention.

FIG. 8 is an exploded perspective view of the above.

FIG. 9 is a perspective view showing a conductive terminal of the above.

FIG. 10 is an exploded perspective view showing a conventional single base fluorescent lamp socket (first conventional example).

FIG. 11 is a sectional view of the same.

FIG. 12 is a front view showing a conventional fluorescent lamp socket (second conventional example).

[Explanation of symbols]

 1 Socket body 1b Lamp pin insertion hole 2 Conductive terminal 2c Elastic piece 5 Single base fluorescent lamp 5a Base 5b Lamp pin

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomoyuki Ono 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (4)

[Claims] 1. A substantially arc-shaped four lamp pin insertion hole into which a lamp pin of a single base fluorescent lamp is inserted, is formed on a surface of the socket body facing the bottom surface of the base of the single base fluorescent lamp. Inside the lamp pin insertion hole, a conductive terminal that comes into contact with the lamp pin is arranged, and a single base fluorescent lamp having four lamp pins standing on the bottom surface of the base is inserted from the front side of the socket body. In a single-base fluorescent lamp socket that rotates and locks about an axis substantially parallel to the insertion direction as a central axis, the conductive terminal has an elastic piece that has elasticity and elastically contacts one side surface of the lamp pin. One-ended fluorescent lamp socket. 2. The single-ended fluorescent lamp socket according to claim 1, wherein the elastic piece is provided so as to contact one side surface of the lamp pin and a rotation center side of the single-ended fluorescent lamp. . 3. The one-piece base according to claim 1, wherein the elastic piece is provided so as to come into contact with a rotation end side of the one-sided fluorescent lamp on one side surface of the lamp pin. Fluorescent light socket. 4. The single-ended fluorescent lamp socket according to claim 1, wherein the elastic piece is provided on one side surface of the lamp pin so as to come into contact with an outside of rotation of the single-ended fluorescent lamp. .