JPH08167460A - Socket for fluorescent lamp - Google Patents

Abstract

PURPOSE: To prevent a fluorescent lamp from a removal accident when it is connected or disconnected. CONSTITUTION: A pair of conductive contact pieces are provided opposing each other in a socket main body 1 in which a lamp pin inserting groove 19 to insert the lamp pin 18 of a fluorescent lamp 17 is formed. At a part of the lamp pin inserting groove 19, a removal preventive projection 20 to prevent the removal of the fluorescent lamp 17 by interfering to the lamp pin 18 is provided freely to open and close.

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 for holding a fluorescent lamp having a pair of lamp pins at both ends, and more particularly to a pinch-type rotary fluorescent socket. is there.

[0002]

2. Description of the Related Art Conventionally, in this kind of lamp socket, in order to securely hold the fluorescent lamp, the fluorescent lamp is moved in a direction orthogonal to the longitudinal direction to insert the lamp pin into the socket, and then the fluorescent lamp is It is attached by rotating around the longitudinal axis. For example, as shown in FIG. 14, a rotor 72 is rotatably attached to the socket body 71, and
An opening 75 for inserting a pair of lamp pins 74 of the fluorescent lamp 73 and a lamp pin insertion groove 76 are formed in the rotor 1 and the rotor 72. The opening 75 is expanded outward to facilitate the insertion of the lamp pin 74.

[0003]

In the case of such a shape, when the fluorescent lamp 73 is attached or detached, the rotor 72 as shown in FIG. 14 is used.
Lamp pin insertion groove 76 and the opening 7 of the socket body 71
5 and 5 are in communication with each other. In this state, when the fluorescent lamp 73 is released, the fluorescent lamp 73 falls due to its own weight.

[0004]

According to the first aspect of the present invention,
In a fluorescent lamp socket in which a pair of electrically conductive contact pieces are arranged to face each other inside a socket body in which a lamp pin insertion groove into which a lamp pin of a fluorescent lamp is inserted is formed,
A drop-out preventing protrusion that interferes with the lamp pin and prevents the fluorescent lamp from falling off is provided in a part of the lamp pin insertion groove so as to be openable and closable.

According to a second aspect of the present invention, the drop-out preventing projection is provided at the opening of the lamp pin insertion groove.

According to the third aspect of the present invention, the drop-out preventing protrusion is formed by forming a cut groove in a part of the socket body so as to have elasticity integrally with the socket body.

[0007]

According to the first aspect of the present invention, when the lamp pin is inserted into the lamp pin insertion groove when the fluorescent lamp is attached or detached, the lamp pin of the fluorescent lamp is stopped by the drop-out preventing projection even when the hand is removed from the fluorescent lamp. It does not fall off from the socket body, and the fluorescent lamp cannot be removed unless the lamp pin is intentionally moved so as to go over the drop-out prevention projection, so it is possible to enhance the safety of work when attaching and detaching the fluorescent lamp. Is.

According to the second aspect of the present invention, since the drop-out preventing projection can be formed on the socket body, it is extremely easy to integrally form the drop-out preventing projection when the socket body is molded.

According to the third aspect of the invention, the elasticity required for the drop-out preventing projection can be easily obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. First, the socket body 1 is formed of a thermoplastic resin. This socket main body 1 has a front surface 2 that serves as a lamp mounting surface, a rear surface 4 that serves as a mounting surface for the fixture main body 3, and a side surface portion 5 that surrounds the periphery, and an opening 6 is provided on one side.
Is formed into a hollow shape. The side surface portion 5 on the opposite side of the opening portion 6 is an arc portion 7. A large-diameter circular hole 8 is formed substantially in the center of the front portion 2, and a small-diameter square hole 9 is also formed at a position close to the opening 6. Further, a bridge portion 11 that has a fitting groove 10 and connects the front portion 2 and the rear portion 4 near the opening 6 is formed. The square hole 9 is located within the width of the fitting groove 10 of the bridge portion 11, and a square fitting protrusion 12 is formed between the bridge portions 11 on the rear surface 4 side. ing. Further, on the inner surface of the back surface portion 4, a pair of elastic legs 1 located at the center of the circular hole 8 and facing each other.
3 is integrally formed to project. These elastic legs 13
End portions of the front surface portion 2 coincide with the outer surface of the front surface portion 2, and engaging tongue pieces 14 are formed at the end portions by bending at right angles.
A semi-circular engagement recess 15 is formed in the center of each of the engagement tongues 14. Then, a locking rib 1 for positioning a contact piece, which will be described later, is provided at the center of the inner surface of the side surface portion 5.
6 is formed to project. Further, a lamp pin insertion groove 19 into which the lamp pin 18 of the fluorescent lamp 17 is inserted is formed in the central portion of the arc portion 7 extending from the front surface portion 2, the rear surface portion 4, and the side surface portion 5. A pair of drop-out preventing projections 20 are formed in the lamp pin insertion groove 19 so as to project in a V shape so that the distances between the respective tips are smaller than the outer diameter of the lamp pin 18. These drop-out preventing projections 20 are formed by two cut grooves 21 parallel to the side surface portion 5.
Is formed integrally with the side surface portion 5. The drop-out preventing projection 20 is formed so as to project inward from a thin hinge portion 22 formed on the outer peripheral surface side of the side surface portion 5 and elastically deform.

On the other hand, the instrument body 3 is provided with a rectangular locking hole 23 and elongated hole-shaped positioning holes 24 located on both sides of the locking hole 23. Then, on the outer surface of the back surface portion 4 of the socket body 1, two positioning legs 25 that fit into the positioning holes 24 are integrally formed. The locking holes 23 are provided between the positioning legs 25.
A pair of elastic holding projections 28 having locking claws 27 that are inserted into the locking holes 23 and engage with the edges 26 of the locking holes 23 are formed. An inclined surface 29 that interferes with the edge portion 26 of the locking hole 23 is formed at the tip of each of the holding projections 28. Further, a locking projection piece 30 is integrally formed from the base of the locking claw 27 of the holding projection 28 so as to project obliquely toward the outer surface of the back surface 4. These locking projections 3
A space corresponding to the plate thickness of the instrument body 3 is formed between the front end portion 31 of 0 and the outer surface of the back surface portion 4. The reference numeral 30a indicates a leaf spring used when the socket body 1 is attached.

Further, the back surface portion 4 of the socket body 1
A guide rib 32 having an arc portion that matches the arc of the circular hole 8 is formed on the inner surface of the. A circular flange 33 is fitted to the guide rib 32 and the inner peripheral surface of the circular hole 8, and a rotor 34 is rotatably attached. The rotor 34 has a drum portion 35 between the circular flanges 33, and a groove 36 is formed by the drum portion 35 and the circular flange 33. An insertion portion 37 for inserting the lamp pin 18 is formed between the drum portion 35 and the circular flange 33 on the front side, and the circular flange 33 portion has an outer diameter of the lamp pin 18 formed by the insertion portion 37. The lamp pin holding portion 38 is formed in accordance with the above. Further, a circular guide hole 39 with which the engaging tongue piece 14 abuts is formed in the center of the circular flange 33 on the front side, and the circular guide hole 39 has a positioning protrusion that engages with and disengages from the engaging concave portion 15. Four
0 is formed so as to project.

Further, a lid 41 for closing the opening 6 of the socket body 1 is provided. This lid 41
On both sides, a pair of lead wire insertion holes 43, into which two lead wires 42 can be inserted by combining a circular portion and a long hole portion, are formed. A projecting portion 44 that fits into the fitting groove 10 of the bridge portion 11 is formed, and a retaining protrusion 45 that fits into the square hole 9 and is retained is formed on the front side of the projecting portion 44. There is. A fitting groove 46 that fits into the fitting protrusion 12 is formed on the back side of the lid 41.

In the socket body 1 thus formed, two contact pieces 47 of the same shape and paired with each other are attached. These contact pieces 47 are formed of a plate material made of a conductive material, and the overall width dimension is set so as to fit in the groove 36 of the rotor 34.
The contact pieces 47 include a terminal portion 49 having an elastic piece 48 to which the lead wire 42 is connected, and the terminal portion 49.
A fixed length elastic piece 50 extending from the fixed side elastic piece 50 and fixedly held in the socket body 1, and folded back from the end of the fixed side elastic piece 50 and inserted into the socket body 1. The fluorescent lamp 17 includes a connecting piece portion 51 that is elastically engaged with and disengaged from the lamp pin 18, and an abutting portion 52 that is formed at an extended tip of the connecting piece portion 51 and abuts on the terminal portion 49. The terminal portion 49 includes two lead wire insertion holes 53 and one lead wire escape hole 54 which are arranged in parallel with each other, and the distal end edge portion 55 of the elastic piece 48 is connected to the edge portion 56 of the lead wire escape hole 54. The edges 55, 56 of each other facing each other.
Is provided so as to sandwich the lead wire 42, and the contact side of the tip end edge portion 55 of the elastic piece 48 and the edge portion 56 of the lead wire escape hole 54 with the lead wire 42 is punched at the burr side. I am trying. The column portion 54a around the lead wire escape hole 54 has an angle of about 45 ° so as to incline outward from the outer edge toward the center. This is to ensure that the tip of the lead wire 42 is inserted into the lead wire escape hole 54 even if the lead wire 42 is pushed in at an angle when it is inserted. The lead wire 42 is securely held by the tip edge portion 55 of the lead wire 48 and the edge portion 56 of the lead wire escape hole 54. Further, a concave lamp pin engaging portion 57 into which the lamp pin 18 falls is formed in an intermediate portion of the connecting piece portion 51. Further, a positioning curved portion 58 that is bent in a U shape and that engages with the rib 16 formed on the inner surface of the side surface portion 5 is formed in an intermediate portion of the fixed side elastic piece 50. Since the two lead wires 42 are connected to each other by the one contact piece 47, the same terminal portion 49 is provided at the intermediate position so that the deformation of the elastic pieces 48 does not affect each other. The slit 59 is formed. Therefore, substantially two elastic pieces 48 are present, but the lead wire 42 is provided at one elastic piece 48 portion.
Even if is inserted, there is no effect on the other elastic piece 48 portion, and the lead wire 42 is connected independently and surely.

In order to complete one assembled socket with such a structure, the socket body 1, the rotor 34, the lid 41 and the two contact pieces 47 are prepared and then assembled. First, the rotor 34 of the socket body 1
Is inserted, and the circular flange 33 is rotatably fitted into the guide rib 32 and the circular hole 8. Then, the contact pieces 47 are respectively inserted from the openings 6 of the socket body 1.
At this time, the position is determined by bringing the positioning curved portion 58 of the contact piece 47 into contact with the rib 16, but the connection piece portion 51 of the contact piece 47 fits into the groove 36 of the rotor 34,
The rotor 34 is retained. After the rotor 34 and the contact piece 47 are attached in this way, the lid 41
The opening 6 is closed with. That is, the lid 41 is attached to the opening 6
The protrusion 44 is fitted in the fitting groove 10, the fitting projection 12 is fitted in the fitting groove 46, the lid 41 is aligned, and the retaining projection 45 is attached. The lid 41 is fixed to the socket body 1 by fitting it into the square hole 9. When the lid body 41 is fixed in this manner, the lid body 41 presses the terminal portions 49 of the contact pieces 47 to contact the contact pieces 47.
Do not slip out. Therefore, all the parts are not disassembled unless the lid 41 is removed. If it is necessary to disassemble for some reason, the lid 4
Although the operation is performed by removing 1, the operation is relatively easy.

The socket body 1 assembled in this way
Is attached to the instrument body 3, but it is necessary to apply a pressing force for axially pressing the fluorescent lamp 17 by the socket body 1 in order to securely hold the fluorescent lamp 17. To do so, fix one socket body 1 to the instrument body 3,
The other socket body 1 is elastically attached. First, the fixed-side socket body 1 is attached as shown in FIG. That is, the pair of positioning legs 25 are inserted into the positioning holes 24 of the instrument body 3 and pushed in as they are. As a result, the inclined surface 29 of the holding projection 28 is fixed to the edge 26
Since the holding projection 28 is hit against the center,
Get over the edge 26 of 3. Then, the locking projection 30 also flexes toward the center side at the edge 26 of the locking hole 23 and rides over the edge 26, so that the tip 31 of the locking projection 30 comes into contact with the other surface of the instrument body 3 by its own elastic force. And restore it with
The socket body 1 is fixed to the instrument body 3.

Next, with respect to the movable socket main body 1, the socket main body 1 is attached to the instrument main body 3 in the same manner as described above with the leaf spring 30a interposed. At this time, as shown in FIG. 9, the socket body 1 is pushed in only until the locking claw 27 of the holding projection 28 has passed over the edge portion 26 of the locking hole 23. In this state, since the socket body 1 receives the force of the leaf spring 30a, the locking claw 27 is locked to the instrument body 3 and the socket body 1 is elastically held.

As a result of the mounting of the socket body 1 on the fixed side and the movable side in this way, the socket body 1 has a completely common shape and can be used for both the fixed side and the movable side. There is no need to increase the types of.

After mounting the socket body 1 in this manner, the fluorescent lamp 17 is mounted. Generally, the distance between the facing surfaces of the socket body 1 facing each other is shorter than the entire length of the fluorescent lamp 17. Has been done. Therefore, when mounting the fluorescent lamp 17, the lamp pin 18 is inserted into the movable socket body 1 and then the socket body 1 is axially pressed to move axially against the force of the leaf spring 30a. Then, the other lamp pin 18 is inserted into the fixed socket body 1. At this time, the lamp pin 18 is inserted from the lamp pin insertion groove 19, but at the time of insertion, the lamp pin 18 comes into contact with the drop-out preventing projections 20 and bends the drop-out preventing projections 20. Two lamp pins 18
When reaches the lamp pin holding portion 38 of the rotor 34, the fluorescent lamp 17 is rotated 90 ° about the axis. As a result, the rotor 34 rotates together with the lamp pin 18, and in the process, the lamp pin 18 contacts the connecting piece 5 of the contact piece 47.
1 and slides while deforming the connecting piece portion 51 and fits into the lamp pin engaging portion 57. In addition, the fluorescent lamp 17
When removing, the reverse operation is performed. During this kind of removal or installation,
When the lamp pin 18 is in the state along the lamp pin insertion groove 19, even if the user releases his or her hand from the fluorescent lamp 17, the lamp pin 18 comes into contact with the drop-out preventing projection 20 and the fluorescent lamp 1
The fluorescent lamp 17 will not fall off under a load of about 7 of its own weight. Conversely, since the fluorescent lamp 17 is temporarily held, the danger of its fall is avoided and the safety is enhanced.

The fluorescent lamp 17 is attached in this manner, and in the process, the connecting piece portion 51 of the contact piece 47 is pushed by the lamp pin 18 and is greatly deformed. The deformation is performed by the bending of the connecting piece portion 51, the bending of the curved portion serving as the connecting portion with the fixed-side elastic piece 50, and the like.
Since the abutting portion 52 that abuts the terminal portion 49 is present at the tip of the contact portion 47, the abutting portion 52 is deformed in the both-supported state, so that the contact piece 47 is not permanently deformed and the necessary pressing force against the lamp pin 18 is maintained. To do. Therefore, sufficient contact pressure necessary for electrical conduction can be obtained for a long period of time.

Next, after the socket body 1 is attached, the lead wire 42 is connected. The connection of the lead wire 42 is performed by pushing the exposed charging portion with the coating removed from the lead wire insertion hole 43. That is, when the lead wire 42 is pushed in, the tip end of the lead wire 42 enters between the surface of the fixed side elastic piece 50 of the contact piece 47 and the elastic piece 48 while bending the elastic piece 48, and the lead wire escape hole 54.
Get in. Therefore, the lead wire 42 is sandwiched between the tip edge portion 55 of the elastic piece 48 and the edge portion 56 of the lead wire escape hole 54. Since the lead wire 42 side of the tip edge portion 55 of the elastic piece 48 and the edge portion 56 of the lead wire escape hole 54 is the burr side at the time of punching, it is strongly bitten into the lead wire 42. Even if the lead wire 42 is pulled, it does not come out. That is, as a result of being mechanically firmly fixed, the electrical connection is stable.

Next, a modification of the above embodiment of the present invention will be described with reference to FIG. That is, in this modified example, the rotor 34 used in the above-described embodiment is omitted. The rotor 34 in the above-mentioned embodiment covers the contact piece 47 (charging part) so as not to be exposed to the outside in any case, and is a safety measure against electric shock. is there. However,
In some cases, it may not be necessary to take such safety measures, and in such a case, the rotor 34 is omitted for assembly in order to reduce costs. Even in this case, the connecting piece portion 51 of the contact piece 47 is formed with the lamp pin engaging portion 57, and the lamp pin 18 is held by the lamp pin engaging portion 57, so that the fluorescent lamp 17 can be stably attached. , And electrical connection.

[0023]

According to the first aspect of the present invention, a pair of electrically conductive contact pieces are disposed in opposition to each other inside a socket body having a lamp pin insertion groove into which a lamp pin of a fluorescent lamp is inserted. In the lamp socket, since a drop-out preventing projection that interferes with the lamp pin and prevents the fluorescent lamp from falling off is provided in a part of the lamp pin insertion groove so that it can be opened and closed.
If you insert the lamp pin into the lamp pin insertion groove when attaching or detaching the fluorescent lamp, even if you release your hand from the fluorescent lamp, the lamp pin of the fluorescent lamp will be stopped by the drop-out prevention protrusion and will fall off from the socket body with a force about its own weight. In addition, even if vibration is applied, the fluorescent lamp cannot be removed unless the lamp pin is consciously moved so as to go over the drop-out prevention protrusion, thus increasing the work safety when attaching and detaching the fluorescent lamp. It is possible.

According to the second aspect of the present invention, since the drop-out preventing projection is provided at the opening of the lamp pin insertion groove, the drop-out preventing projection can be formed in the socket body. Therefore, the drop-out preventing projection can be formed when the socket body is molded. This has the effect that it is extremely easy to integrally form the parts.

According to the third aspect of the present invention, the drop-out preventing projection is formed by forming a cut groove in a part of the socket main body so as to have elasticity with the socket main body. This has the effect that the elasticity required for can be easily obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a bottom view of the socket body.

FIG. 3 is an exploded perspective view showing the instrument body together.

FIG. 4 is a perspective view seen from the front side together with a fluorescent lamp.

FIG. 5 is a perspective view seen from the back side.

FIG. 6 is a vertical sectional front view in an assembled state.

FIG. 7 is a front view showing a state in which a fluorescent lamp is attached.

FIG. 8 is a horizontal cross-sectional plan view showing a state where the device is fixedly attached to the instrument body.

FIG. 9 is a horizontal cross-sectional plan view showing a state of being elastically attached to the instrument body.

FIG. 10 is a perspective view of a contact piece.

11 is a cross-sectional view taken along the line AA of FIG.

FIG. 12 is a partially enlarged front view showing a state in which lead wires are connected.

FIG. 13 is a front view showing a modified example of the present embodiment.

FIG. 14 is a front view showing a conventional example.

[Explanation of symbols]

 1 Socket body 17 Fluorescent lamp 18 Lamp pin 19 Lamp pin insertion groove 20 Fall-out prevention protrusion

Claims (3)

[Claims] 1. A fluorescent lamp socket in which a pair of conductive contact pieces are arranged to face each other inside a socket body in which a lamp pin insertion groove for inserting a lamp pin of a fluorescent lamp is formed. A socket for a fluorescent lamp, wherein a drop-out preventing projection that interferes with the lamp pin to prevent the fluorescent lamp from falling is provided in a part of the groove so as to be openable and closable. 2. The fluorescent lamp socket according to claim 1, wherein the drop-out preventing projection is provided at an opening of the lamp pin insertion groove. 3. The fluorescent lamp according to claim 1, wherein the drop-out preventing protrusion is formed by forming a cut groove in a part of the socket main body so as to have elasticity with the socket main body. For socket.