JP3965727B2 - Mounting structure of fluorescent lamp socket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluorescent lamp socket mounting structure that is provided in a fluorescent lamp illuminator using a straight tube fluorescent lamp as a light source and removably supports the lamp.
[0002]
[Prior art]
Some fluorescent lamp sockets that support straight tube fluorescent lamps are used in combination with a socket base that has a socket mounting cylindrical portion that accommodates this socket. Those that have been plated to improve are used. In this form of use, generally, the cylindrical socket mounting cylinder portion having an open front surface of the socket base is arranged in a posture in which the axis is horizontal, and the fluorescent lamp socket is accommodated in the mounting cylinder portion.
[0003]
The fluorescent lamp socket used in this manner has an operating body protruding from the front end of the socket body having a substantially cylindrical shape, and the protruding portion protrudes to the outside through the front opening of the mounting cylinder portion. Yes. A lamp pin through hole is formed in the front surface of the operating body, and the lamp pin of a straight tube type fluorescent lamp is inserted into the operating body, and the operating body is pushed in so that the lamp can be removed between a pair of fluorescent lamp sockets. can do.
[0004]
In combination with a similar socket base, as described in Japanese Utility Model Publication No. 55-39574, the operating body passes through the front end of the socket mounting cylinder portion that accommodates the substantially cylindrical socket body of the fluorescent lamp socket. There is also known an attached ring-shaped presser frame that is exposed. In the configuration including such a presser frame, the fluorescent lamp socket accommodated in the mounting tube portion can be prevented from being detached.
[0005]
[Problems to be solved by the invention]
The working body of this type of fluorescent lamp socket contains a contact that makes electrical contact with the lamp pin inserted into the lamp pin through hole. Since the conventional contact has a structure that receives the tip of the lamp pin in a plane perpendicular to the lamp pin, even if the straight tube type fluorescent lamp is removed during lamp replacement or the like, the contact does not receive the pulling force by the lamp pin. However, in the contact as described above, since the reliability of the electrical contact is low, the applicant has a contact having a pair of contact pieces that elastically sandwich the inserted lamp pin from both radial sides. Fluorescent lamp sockets built in are now being developed.
[0006]
Such a contact elastically holds the lamp pin inserted between the pair of contact pieces so as to open them, so that the reliability of the electrical contact between the lamp pin and the contact can be improved. When the straight tube fluorescent lamp is removed from the contact, the contact receives the pulling force by the lamp pin due to the clamping force.
[0007]
Therefore, in the conventional socket mounting structure in which the fluorescent lamp socket is simply accommodated in the socket mounting cylindrical portion of the socket base, when using the fluorescent lamp socket in which the contact having the pair of contact pieces as described above is used, The pull-out force may cause the fluorescent lamp socket to be dragged out of the socket base. Even if such a situation occurs, the fluorescent lamp socket connected to the interior of the lighting fixture via the lead wire will not fall off, but the fluorescent lamp socket will deviate from the predetermined storage position, so both ends of the straight tube fluorescent lamp It becomes impossible to maintain a proper lamp socket interval between the pair of fluorescent lamp sockets that support the lamp. As a result, it may be difficult to easily install a new straight tube fluorescent lamp when replacing the lamp.
[0008]
Further, such a problem can be solved by using a presser frame as described in the above publication. However, since a presser frame is required for this purpose, the number of parts and assembly man-hours required in the socket mounting structure increase, resulting in a problem of increased costs.
[0009]
Accordingly, a first problem to be solved by the present invention is to obtain a fluorescent lamp socket mounting structure capable of holding a fluorescent lamp socket accommodated in a socket base in a predetermined accommodating position without requiring any special parts.
[0010]
[Means for Solving the Problems]
In order to solve the first problem, the invention according to claim 1 is characterized in that a socket mounting cylinder portion having an open front surface and an outer peripheral surface of the socket mounting cylinder portion are integrally provided so as to protrude from the socket mounting cylinder portion. A socket base made of a stand column having a lead wire passage communicating with the inner space, an inner peripheral surface of the socket attachment tube portion and a claw receiving portion formed inside the socket attachment tube portion by the lead wire passage, and insertion A fluorescent lamp socket of a plug-in type that has a built-in contact having a contact piece for elastically clamping a lamp pin from both sides in a radial direction and is inserted into the socket mounting cylinder from its front opening end comprising a locking pawl which projects integrally from the peripheral surface of the synthetic resin socket body lamp socket has, hooked to the locking pawl to said claw receiving portions It is obtained by fixing the fluorescent lamp socket accommodated in the socket mounting cylinder portion Te.
[0011]
In the first aspect of the present invention, when the fluorescent lamp socket is accommodated in the socket mounting cylinder portion of the socket base, the locking claw of the socket is hooked on the claw receiving portion of the socket base, and the socket is connected to the mounting cylinder. The movement of the direction pulled out from the part is obstructed. For this reason, the socket contact has a pair of contact pieces that elastically clamp the lamp pin from both sides in the radial direction, and therefore, with the removal of the straight tube fluorescent lamp inserted and connected to the socket. In spite of receiving the force with which the socket is pulled out from the mounting cylinder through the contact, the socket is prevented from being pulled out and the socket is held in a predetermined accommodation position. Thereby, an appropriate lamp socket interval can be maintained. The claw receiving portion is integrated with the socket base, and the locking claw that is hooked on the claw receiving portion is integrated with the socket body, so that the position shift of the socket from the predetermined accommodation position due to the removal of the lamp is prevented. In order to prevent this, special parts such as a presser frame are not required. Further, since the inner corners inevitably formed by the lead wire passages of the socket pillars and the socket mounting cylinders are used for the claw receiving parts, a special configuration is required to provide the claw receiving parts. Therefore, the structure of the molding die for the socket base is not complicated, and the die cost and the overall cost can be reduced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0013]
FIG. 1 is a perspective view showing the configuration of the entire fluorescent lamp lighting apparatus. In FIG. 1, reference numeral 1 denotes a reflector that is attached to a chassis (not shown) fixed to a mounting surface such as a ceiling. An electrical component such as a lighting device is attached to the chassis. Exposed-type lamp support devices 3 on which both ends of the straight tube fluorescent lamp 2 are detachably supported are provided at both ends in the longitudinal direction of the reflector 1. In the case of the single lamp type shown in FIG. 1, a set of these support devices 3 is provided. However, when the present invention is applied to a multi-lamp type fluorescent lamp lighting fixture, a large number of sets of exposed lamp support devices 3 are provided. Provided.
[0014]
Each lamp support device 3 includes a socket base 4 and a plug-in type fluorescent lamp socket 5. The socket base 4 itself is chrome-plated to improve the appearance of the entire lighting fixture.
[0015]
The socket base 4 is made of a synthetic resin such as polypropylene, nylon, or polybutylene terephthalate, or an integrally molded product of light metal. The socket base 4 includes a stand part 11 and a socket mounting cylinder part 12. As shown in FIGS. 2 to 5, the stand portion 11 is formed by integrally projecting a stand column 14 on a stand base 13, and a socket mounting cylinder portion 12 is integrally formed at the tip of the stand column 14.
The stand unit 11 has a plurality of positioning protrusions 15 provided on the back surface of the stand base 13 inserted into positioning holes (not shown) provided on the reflector 1 and penetrates the reflector 1 downward. A screw 17 (see FIG. 4) is screwed into a plurality of screw receiving holes 16 provided integrally on the back surface of the base 13 so as to be mounted on the lower surface of the reflector 1. The stand column 14 is hollow, and the hollow portion is used as a lead wire passage 14a. One end 14 a 1 of the passage 14 a is opened on the back surface of the stand base 13, and the other end communicates with the socket mounting cylinder 12. The one end opening 14a1 is communicated with a through hole (not shown) correspondingly opened on the lower surface of the reflector 1 in a mounted state on the reflector 1.
[0016]
The socket mounting cylinder portion 12 has a cylindrical shape with the front end opened and the rear end closed, and is provided in a horizontal posture with its axis perpendicular to the axis of the stand column 14. As shown in FIGS. 2 to 5, a pair of first ribs 18 and a pair of second ribs 19 extending in the axial direction of the cylindrical portion 12 are provided on the inner surface of the socket mounting cylindrical portion 12, for example, every 90 °. It is integrally formed. Each of the ribs 18 and 19 has positioning steps 18a and 19a at a substantially central portion in the longitudinal direction, and the width of the front side is narrower than that of the rear side with the steps 18a and 19a as a boundary. ing.
[0017]
As shown in FIG. 4, the socket base 4 is integrally provided with a claw receiving portion 20. In the first embodiment, it is formed by an inner corner formed by the lead wire passage 14 a and the socket mounting cylinder 12. According to the configuration using the corners inevitably formed as described above, a special configuration is not required to provide the claw receiving portion 20, and the structure of the molding die of the socket base 4 is complicated. It is excellent in that the mold cost and the overall cost can be reduced .
[0018]
As shown in FIG. 6 and the like, the fluorescent lamp socket 5 includes a socket body 21, a socket rear cover 22, a pair of terminal fittings 23, an operating body 24, a pair of contacts 25, and a pair of conductive coil springs. 26.
[0019]
The socket body 21 made of synthetic resin has a substantially cylindrical shape having a rectangular through hole 31 (see FIGS. 1 and 2) at one end and the other end opened. Similarly, the socket rear cover 22 made of synthetic resin is fixed to the socket body 21 with a screw (not shown) while closing the other end opening. On the outer peripheral surface of the socket casing formed by the socket body 21 and the socket rear cover 22, a pair of grooves 33 fitted to the first rib 18 are provided extending in the axial direction of the casing. Yes. Both terminal fittings 23 are attached to the inner surface of the socket rear cover 22 while being insulated from each other. Lead wires 34 are connected to the terminal fittings 23 in the socket casing, and the lead wires 34 are drawn out of the socket casing.
[0020]
The operating body 24 made of synthetic resin is slidably accommodated in the socket body 21 through the through hole 31. A pair of lamp pin through holes 24 a are provided in the front end wall of the operating body 24 located outside the socket body 21, and the other end located in the socket body 21 is opened. The pair of contacts 25 are accommodated in the operating body 24. These contacts 25 are formed by bending conductive leaf springs, and have a pair of contact pieces 25a and a contact base portion 25b that connects them together. Both contacts 25 maintain a purse-like shape in which the tip ends of the pair of contact pieces 25a are in contact with each other by their own elastic force in a free state. Are attached to a mounting shaft 35 provided integrally with a mounting hole (not shown) formed in the contact base portion 25b.
[0021]
In FIG. 6, reference numeral 36 denotes a mounting shaft support integrally provided on the operating body 24 so as to straddle the lamp pin through hole 24a from the inside, and a mounting shaft 35 projects therefrom. These mounting shaft supports 36 are sandwiched between a pair of contact pieces 25a, so that the pair of contact pieces 25a are kept slightly open and are opposed to the lamp pin through holes 24a. With this structure, the pair of contact pieces 25a of both contacts 25 are mutually connected by the lamp pins 2a (see FIG. 3) of the straight tube type fluorescent lamp 2 inserted into the operating body 24 through the lamp pin through holes 24a facing them. Thus, the pair of contact pieces 25a elastically sandwich the lamp pin 2a from both sides in the radial direction so that electrical contact between the contact 25 and the lamp pin 2a can be performed with high reliability. It is like that.
[0022]
The coil spring 26 is accommodated across the socket body 21 and the actuating body 24 so that both ends thereof are in contact with the terminal fitting 23 and the contact base portion 25b, and the actuating body 24 is always attached in a direction protruding from the through hole 31. It is fast.
[0023]
As shown in FIGS. 2 to 4, a locking claw 37 is integrally provided on the outer peripheral surface of the socket body 21 so as to protrude in the drawing direction of the lead wire 34 . The claw 37 is hooked on the claw receiving portion 20 to fix the fluorescent lamp socket 5 to the socket mounting cylinder portion 12. The locking claw 37 may be a simple convex portion, but in the first embodiment, an arm-shaped claw base portion 38 extending along the axial direction of the socket body 21 and a tip portion of the claw base portion 38 are provided. It is formed by a toe portion 39 that is formed and hooked on the nail receiving portion 20. The claw base 38 can be elastically deformed in a direction in which the claw base 38 is in contact with or separated from the outer peripheral surface of the socket body 21. Thus, according to the structure which makes the latching nail | claw 37 elastically deformable, while securing the latching allowance of the nail | claw receiving part 20 much, it can ensure a catch, and to the socket stand 4 demonstrated below, The fluorescent lamp socket 5 can be attached with a light force, and the lamp support device 3 can be easily assembled.
[0024]
To assemble the lamp support device 3, first, the two lead wires 34 drawn from the rear part of the fluorescent lamp socket 5 are introduced from the front end opening of the socket mounting cylinder portion 12 of the socket base 4, and the stand column 14. The lead wire passage 14a is pulled out from the one end opening 14a1. Next, the fluorescent lamp socket 5 is accommodated through the front end opening in the socket mounting cylinder portion 12 with the lead wire 34 being pulled out, with the socket rear cover 22 side as the head.
[0025]
In this housing, the groove 33 of the fluorescent lamp socket 5 is fitted into the first rib 18 in the socket mounting cylinder portion 12, so that the operating body 24 of the fluorescent lamp socket 5 is in a horizontal position as shown in FIG. Keep inserted. With this insertion, as shown in FIG. 4 (A), the locking claw 37 integrated with the socket body 21 first hits the front end of the socket mounting cylinder portion 12 so as to be close to the outer surface of the socket body 21. While deforming, the inner surface of the socket mounting cylinder 12 is slid along with the insertion. Then, when the fluorescent lamp socket 5 is inserted to the predetermined accommodation position, the toe portion 39 is detached from the inner surface of the socket mounting cylinder portion 12 by the elastic force of the locking claw 37 at that time, and enters the lead wire passage 14a. It is hooked on the claw receiving portion 20 of the socket base 4. This state is shown in FIG. Note that, in the accommodated state at such an appropriate position, the socket rear cover 22 of the socket 5 approaches the steps 18a and 19a of the ribs 18 and 19, and further hinders the movement of the fluorescent lamp socket 5 to the back side. It is done. In addition, the rib portion having a narrower width on the front side than the steps 18a and 19 of the ribs 18 and 19 prevents the fluorescent lamp socket 5 from moving in the radial direction within the socket mounting cylindrical portion 12 and Since the fluorescent lamp socket 5 is pressed against the first rib 18 by elasticity, the accommodation posture of the fluorescent lamp socket 5 can be stabilized, and accordingly, the catching claw 37 is caught on the claw receiving portion 20. You can prevent it from accidentally coming off.
[0026]
The straight tube fluorescent lamp 2 is detachably supported between the pair of left and right lamp support devices 3 assembled in the above procedure. For mounting the lamp 2, first, the lamp pin 2a on one end side of the lamp 2 is inserted into the lamp pin through hole 24a of the working body 24 provided in the fluorescent lamp socket 5 of the one lamp support device 3 , and the working body 24 is pushed in. Thereafter, the lamp pin 2 a on the other end side of the lamp 2 is inserted into the lamp pin through hole 24 a of the operating body 24 provided in the fluorescent lamp socket 5 of the other lamp support device 3 . Then, the lamp 2 is sandwiched between the actuating bodies 24 urged by the coil springs 26 of both fluorescent lamp sockets 5 and supported across the pair of left and right lamp support devices 3.
[0027]
Then, in order to remove the fluorescent lamp 2 that is mounted and supported as described above in lamp replacement or the like, the procedure can be performed in the reverse order of the mounting. In this case, since the lamp pin 2a is elastically sandwiched between a pair of contact pieces 25a included in the contact 25 in the operating body 24, the pulling force applied to the operating body 24 via the contact 25 as the lamp pin 2a is pulled out. The entire fluorescent lamp socket 5 is about to be pulled out.
[0028]
However, as described above, since the locking claw 37 integral with the socket body 21 of the fluorescent lamp socket 5 is hooked on the claw receiving portion 20 integral with the socket base 4, the pulling force is caused by the stopper action there. In spite of this, the fluorescent lamp socket 5 is prevented from moving forward in the direction in which the fluorescent lamp socket 5 is pulled out from the socket mounting cylinder portion 12 of the socket base 4, and the fluorescent lamp socket 5 is held in a predetermined accommodation position with respect to the socket base 4. it can.
[0029]
Therefore, it is possible to prevent the fluorescent lamp socket 5 from being pulled out with the removal of the fluorescent lamp 2, and the socket interval between the pair of lamp support devices 3 can be maintained at an appropriate interval. Can be installed.
[0030]
In addition, the locking claw 37 and the claw receiving portion 20 are provided to prevent the fluorescent lamp socket 5 from being pulled out from the socket base 4 as described above, but the locking claw 37 is formed integrally with the socket body 21, And since it is integral with the socket base 4 of the nail | claw receiving part 20, a special component is not required for the said drawer | draw-out prevention. Therefore, the number of parts and assembly man-hours can be reduced, and the cost can be reduced accordingly.
[0031]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0032]
According to the first aspect of the present invention, the locking claw integral with the fluorescent lamp socket is hooked on the claw receiving portion of the socket base, and the movement in the direction in which the socket is pulled out from the socket mounting cylinder portion of the socket base. By preventing the socket from being pulled out with the removal of the straight tube fluorescent lamp, the socket can be held at a predetermined accommodation position, and a special part such as a presser frame is required for realizing this. Can be easily implemented. Furthermore, since the inner corners inevitably formed by the lead wire passages of the socket pillars and the socket mounting cylinders are used for the claw receiving parts, a special configuration is required to provide the claw receiving parts. Therefore, the structure of the molding die for the socket base is not complicated, and the die cost and the overall cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the overall configuration of a fluorescent lamp luminaire.
FIG. 2 is a front view showing a fluorescent lamp socket mounting structure according to the first embodiment of the present invention employed in the lighting apparatus shown in FIG. 1;
FIG. 3 is an exploded perspective view showing a fluorescent lamp socket mounting structure according to the first embodiment of the present invention employed in the lighting apparatus shown in FIG. 1;
FIG. 4A is a cross-sectional view showing a state immediately before assembling the socket base and the fluorescent lamp socket that constitute the fluorescent lamp socket mounting structure according to the first embodiment;
(B) is sectional drawing which shows the state by which the socket stand and fluorescent lamp socket which comprise the attachment structure of the fluorescent lamp socket which concern on 1st Embodiment were assembled.
5 is a cross-sectional view taken along line ZZ in FIG.
6 is a cross-sectional view of the fluorescent lamp socket shown along line YY in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Straight tube | pipe type fluorescent lamp, 2a ... Lamp pin, 3 ... Lamp support device, 4 ... Socket stand, 5 ... Fluorescent lamp socket, 12 ... Socket mounting cylinder part, 14 ... Stand pillar, 14a ... Lead wire channel | path, 20 ... Nail | claw Receiving part, 21 ... socket body, 24 ... acting body, 24a ... lamp pin through hole, 25 ... contact, 25a ... contact piece, 37 ... locking claw, 38 ... nail base, 39 ... toe part.

Claims (1)

A socket mounting cylindrical portion having a front surface opened , and a socket base formed of a stand column having a lead wire passage projecting integrally with an outer peripheral surface of the socket mounting cylindrical portion and communicating with an inner space of the socket mounting cylindrical portion ;
A claw receiving portion formed inside the socket mounting cylinder by the inner peripheral surface of the socket mounting cylinder and the lead wire passage ;
A plug-in type fluorescent lamp socket that contains a contact having a contact piece that elastically clamps a lamp pin to be inserted from both sides in a radial direction and is inserted into the socket mounting cylinder portion from its front opening end,
A locking claw integrally protruding from the peripheral surface of the synthetic resin socket body of this fluorescent lamp socket,
The fluorescent lamp socket mounting structure is characterized in that the fluorescent lamp socket accommodated in the socket mounting cylindrical portion is fixed by hooking the locking claw on the claw receiving portion.

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