JP3227386B2 - Ring fluorescent lamp socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular fluorescent lamp socket.

[0002]

2. Description of the Related Art FIG. 7 is a front view showing a ceiling-suspended illumination lamp 10 provided with a conventional ring-shaped fluorescent lamp socket. The illustrated state is a state in which the umbrella and the fluorescent lamp have been removed. The two large and small fluorescent lamps are held by a socket 11 and a support spring 14 which are arranged 180 ° apart from each other. The socket 11 has a holder 12 with a built-in connector 12a at the end, and by inserting an electrode of a fluorescent lamp into this portion, electrical connection is made.
The fluorescent lamp is held by using the holding spring 13 as an auxiliary. The two-point support structure of the fluorescent lamp using the socket and the support spring as described above is disclosed in, for example, Japanese Utility Model Laid-Open No. 58-127590 and Japanese Utility Model Publication No. 4-33602.

[0003]

In the conventional structure as described above, the fluorescent lamp is eccentric or inclined as described below because of the two-point support structure of the socket (holder) and the support spring. It was easy. FIG. 8 shows the holder 12.
FIG. 3 is a plan view showing a fluorescent lamp 20 supported by the support spring 14 and the fluorescent lamp 20. As shown in the figure, the fluorescent lamp 20, which should be supported at the position shown by the dashed line, may be eccentrically attached to the position shown by the solid line. FIG. 9 is a side view showing the fluorescent lamp 20 supported by the holder 12 and the support spring 14. As shown in the figure, a fluorescent lamp 20, which should be supported horizontally at a position indicated by a dashed line, may be attached at an angle as indicated by a solid line. If the fluorescent lamp is eccentric or inclined as described above, the appearance is not good, so that it is necessary to adjust the mounting state again and correct it to a correct position, and the efficiency of the fluorescent lamp mounting operation is poor. Also, if the connector 12a (FIG. 7) in the holder 12 and the electrode (not shown) of the fluorescent lamp 20 are in good contact with each other when used in an eccentric or inclined state, heat may be generated at the contact portion. is there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and enables a fluorescent lamp to be securely mounted at a correct position by a single mounting operation without causing eccentricity and inclination. It is an object of the present invention to provide a ring-shaped fluorescent lamp socket.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a ring-shaped fluorescent lamp socket according to the present invention includes a connector for electrically connecting to the ring-shaped fluorescent lamp in a holder for holding the ring-shaped fluorescent lamp. A built-in socket, wherein the holder has a cylindrical surface having a predetermined length along the surface of the annular fluorescent lamp ,
An elastic main holder having an opening portion which is expanded and fitted with a fluorescent lamp, and which is configured such that a minimum distance between an electrode of the connector and a cylindrical end surface is at least a distance between the electrodes with respect to an axial direction of the cylindrical surface. And an auxiliary holder formed so as to protrude by a predetermined length in the axial direction from a part of both end surfaces of the main holder. The main holder configured as described above has, at both ends, an edge portion in the axial direction such that the distance to the end face is equal to or greater than the distance between the electrodes of the ring-shaped fluorescent lamp. And the holding state is stabilized. On the other hand, when the fluorescent lamp is mounted, the auxiliary holder configured as described above comes into contact with the surface of the fluorescent lamp and maintains the mounting posture of the fluorescent lamp correctly.

In the above configuration, the main holder may be configured so that the length in the axial direction is constant over the entire circumferential direction. With this configuration, the main holder uniformly applies a holding force to the fluorescent lamp over the entire circumference of the holding.

[0007] In the above structure, when the ring-shaped fluorescent lamp socket is attached to the illumination lamp, the auxiliary holder has a small piece shape protruding from a position to be the uppermost end face of the main holder. It may be configured as follows. In this case, the auxiliary holder presses the fluorescent lamp from above to prevent the mounting posture from being inclined.

[0008]

1 to 4 are views showing a socket for a ring-shaped fluorescent lamp according to an embodiment of the present invention. FIGS. It is a perspective view, a front view, and a side view of the holder 2 provided. FIG. 4 is a side view showing the overall shape of the socket 1.
This socket 1 is used in place of the socket 11 of FIG. 7 described as a conventional technique. In FIG. 4, the holder 2 on the left side of the figure is for a large-diameter fluorescent lamp, and the holder 2 on the right side is for a small-diameter fluorescent lamp. FIG. 1 is a perspective view showing only the tip of the socket 1 provided with the holder 2 for a large-diameter fluorescent lamp, but the holder 2 for a small-diameter fluorescent lamp has the same structure. The housings of the socket 1, the holder 2 and the connector 3 are all insulators.

The connector 3 is held so as to penetrate through the center of the holder 2 and slightly project therefrom. The back surface of the connector 3 is housed inside the socket 1. Holder 2
Is composed of a main holder 2a and an auxiliary holder 2b. The auxiliary holder 2b is formed integrally with the main holder 2a. The main holder 2a has an opening A (portion defined by the width W0 in FIG. 3) for fitting a fluorescent lamp,
It has a substantially cylindrical shape having a cylindrical surface along the surface of the fluorescent lamp on its inner surface. The width W0 is configured to be slightly smaller than the diameter of the fluorescent lamp in order to have a function as a stopper after the fluorescent lamp is mounted. Due to the elasticity of the main holder 2a, the fluorescent lamp is mounted with its width W0 expanded and mounted. After mounting, the fluorescent lamp is stably held by the main holder 2a having an inner diameter slightly larger than the diameter of the fluorescent lamp.

In FIG. 2, when viewed in the axial direction of the main holder 2a having a cylindrical surface inside (in the left-right direction in FIG. 2, in FIG. 3, perpendicular to the paper), the distance between the electrodes 3a of the connector 3 (electrode) Distance between the electrodes 3a and the main holder 2
Ld ≧ Lc with the distance Ld to the end face of “a”. That is, at least the distance Ld has the same value as the distance Lc. FIG. 5 is a cross-sectional view of the fluorescent lamp 2 shown in FIG.
It is a figure showing the state where 0 was attached. In the figure, the surface of the fluorescent lamp 20 does not rotate since it contacts the edge 2a1 of the main holder 2a. Therefore, the eccentricity shown in FIG. 8 does not occur. Such an eccentricity-suppressing effect is obtained by the distance Ld described above.
The edge portion 2a1 is formed so as to have

Next, returning to FIGS. 1 to 3, the auxiliary holder 2b will be described.
Will be described. The auxiliary holder 2b is a main holder 2a.
Has a small piece shape protruding in the axial direction of the main holder portion 2a from a part of both left and right end surfaces. An example of the length La of the main holder portion 2a and the length Lb of the auxiliary holder 2b in the axial direction is La = 25 mm and Lb = 7 mm.
Further, as shown in FIG. 3, the auxiliary holder 2b is provided with a main holder 2a based on the center line direction of the holder 2 in FIG.
At an angle α from the cylindrical axis of α is, for example, 45 °. FIG. 6 shows the socket 1 in the state shown in FIG.
FIG. 8 is a view showing a state in which is attached to an illumination lamp (see FIG. 7) at an angle of 45 ° and a fluorescent lamp 20 is attached. As shown in the figure, the auxiliary holder 2b is located at the uppermost part of the upper surface of the fluorescent lamp 20, and is arranged at a position where it can come into contact with the fluorescent lamp 20 from above. Therefore, even if the fluorescent lamp 20 is mounted to be inclined, the fluorescent lamp 20 cannot be tilted because it comes into contact with the auxiliary holder 2b. Thus, the fluorescent light 2
0 is always mounted horizontally.

In the above embodiment, the length (La) of the main holder 2a in the axial direction is constant in the circumferential direction. However, for example, the length (La) becomes smaller (smaller) toward the lower part of FIG. You can also. In such a configuration, for example, when the socket 1 is mounted at an angle as shown in FIGS. 4 and 6, the portion that abuts on the inner diameter side of the fluorescent lamp has a small contact area, and Since the contact area has a large contact area, the holding structure can be configured to match the curvature of the fluorescent lamp.

[0013]

The present invention configured as described above has the following effects. As a holder for holding the ring-shaped fluorescent lamp, it has a cylindrical surface of a predetermined length along the surface of the ring-shaped fluorescent lamp, and the minimum distance between the electrode of the connector and the cylindrical end surface is at least the distance between the electrodes in the axial direction of the cylindrical surface. Are provided, and auxiliary holders formed by projecting a predetermined length in the axial direction from a part of both end surfaces of the main holder are provided. With respect to the direction, edge portions are provided at both ends such that the minimum distance from the electrode position to the end face is equal to or longer than the distance between the electrodes of the annular fluorescent lamp. As a result, the holding width of the fluorescent lamp is widened, and the holding state can be made stable and reliable. In addition, when the fluorescent lamp is mounted, the auxiliary holder abuts on the surface of the auxiliary lamp to maintain the mounting posture of the fluorescent lamp correctly. By the operation of the main holder and the auxiliary holder, an appropriate mounting posture can be reliably obtained by a single mounting of the fluorescent lamp.

When the main holder is configured so that the length in the axial direction is constant over the entire circumferential direction,
Since the holding force can be uniformly applied to the fluorescent lamp over the entire circumference of the holding, the holding state is more stable and reliable.

Further, when the ring-shaped fluorescent lamp socket is attached to the illumination lamp, when the auxiliary holder portion is configured to have a small piece shape protruding from a position to be the uppermost portion of the end face of the main holder portion, Since the auxiliary holder presses the fluorescent lamp from above to prevent the mounting posture from being inclined, the fluorescent lamp can be securely mounted horizontally.

[Brief description of the drawings]

FIG. 1 is a perspective view of the vicinity of a holder of a ring-shaped fluorescent lamp socket according to an embodiment of the present invention.

FIG. 2 is a front view of the annular fluorescent lamp socket shown in FIG. 1;

FIG. 3 is a side view of the annular fluorescent lamp socket shown in FIG. 1;

FIG. 4 is a side view showing an overall configuration including two ring-shaped fluorescent lamp sockets shown in FIG. 1;

5 is a sectional view taken along line VV of FIG. 2 showing the connector 3 built in the holder 2 and a view showing the fluorescent lamp 20. FIG.

FIG. 6 is a side sectional view showing the holder 2 of the present embodiment with the fluorescent lamp 20 mounted.

FIG. 7 is a side view showing an illumination lamp provided with a conventional ring-shaped fluorescent lamp socket.

FIG. 8 is a plan view showing a state where the fluorescent lamp 20 is eccentric.

FIG. 9 is a side view showing a state where the fluorescent lamp 20 is inclined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket 2 Holder 2a Main holder part 2b Auxiliary holder part 3 Connector 3a Electrode

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F21V 19/00

Claims (3)

(57) [Claims] 1. A socket having a built-in connector for making an electrical connection with the ring-shaped fluorescent lamp in a holder for holding the ring-shaped fluorescent lamp, the holder having a predetermined length along the surface of the ring-shaped fluorescent lamp. Cylindrical surface and push
An opening for expanding and inserting a fluorescent lamp , wherein a minimum distance between an electrode of the connector and a cylindrical end face is at least a distance between the electrodes in the axial direction of the cylindrical surface.
An annular fluorescent lamp socket comprising: a main holder having elasticity ; and auxiliary holders formed by projecting a predetermined length in the axial direction from a part of both end surfaces of the main holder. . 2. The ring-shaped fluorescent lamp socket according to claim 1, wherein the length of the main holder in the axial direction is constant over the entire circumferential direction. 3. The auxiliary holder portion has a small piece shape protruding from a position to be the uppermost end of the end surface of the main holder portion when the ring-shaped fluorescent lamp socket is attached to an illumination lamp. The annular fluorescent lamp socket according to claim 1.