JPH0120738Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a lighting fixture with a good appearance.

[Background technology]

A plurality of fitting holes are formed on the outer peripheral surface of the device body, the lamp support arm is fitted into the fitting hole, and the lamp support arm is pushed by a spring from inside the device body,
There is a lighting fixture in which the lamp is supported by pressing the inner peripheral surface of the annular fluorescent lamp with the tip support portion of the lamp support arm.

However, when supporting an annular fluorescent lamp with a large lamp diameter, such as a 32W annular fluorescent lamp,
The play between the lamp support arm and the fitting hole causes the lamp support arm to hang down, resulting in an unsightly appearance. Another drawback was that the lamp support arm was easily removed when replacing the lamp.

[Purpose of invention]

The purpose of this invention is to provide a lighting fixture that prevents the lamp support arm from hanging down and does not come off easily.

[Disclosure of invention]

The lighting device of this invention has a plurality of lamp support arms each having a horizontal slit groove for imparting elasticity on the end surface of the base end, and a tapered surface with a larger height on the end surface side on the upper surface of the base end. , a device main body having a fitting hole formed on the outer peripheral surface through which the base end portion is inserted and the tapered surface is locked to the upper edge of the inner end; and a device body provided in the device body to press the end surface of the lamp support arm. A spring is provided that presses the tapered surface against the upper edge of the inner end of the fitting hole and presses the tip support portion of the lamp support arm against the inner periphery of the annular fluorescent lamp. Since the tapered surface engages with the inner end of the fitting hole, it becomes difficult to come off.
Further, since the tapered surface pushes down the base end side, the hanging of the lamp support arm can be reduced.

Embodiment An embodiment of this invention will be described based on FIGS. 1 to 4. In the figure, a device main body 1 has lighting components (not shown) such as a ballast placed inside it, has a base 2 at its upper end that can be attached to an incandescent lamp socket, and has a plurality of fitting holes 3 formed on its outer circumferential surface. ing. The lamp support arm 4 has an arc-shaped tip support portion 5 formed at its tip, and a pair of elasticity imparting slit grooves 8 and 9 crisscrossingly formed on the end surface 7 of the base end portion 6. Triangular protrusions 10 are formed on the left and right side surfaces of the base end 6 in the width direction, and on the upper surface of the base end 6 in the width direction of the horizontal slit groove 8, the height on the end face 7 side is large and the upper and lower sides of the arm 4 are A tapered surface 11 that protrudes beyond its width is formed. Further, a spring receiving projection 7a is formed on the end face. This lamp support arm 4 is fitted into the fitting hole 3, and at this time, the slit grooves 8 and 9 form the tapered surface 11 and the protrusion 1.
0 is elastically deformed and can be fitted. and protrusion 10
As shown in FIG. 4, the inner end 3a of the fitting hole 3 is engaged with the inner end 3a on both sides thereof, and the tapered surface 11 is engaged with the upper edge 14 of the inner end. A spring 13 formed of a coil spring is compressed and interposed between the spring receiving projection 7a of the end face 7 and a spring support portion 12 provided in the instrument main body 1 so as to bias the lamp support arm 4 to protrude. At this time, the lamp support arm 4 is prevented from coming out by the protrusion 10 and the tapered surface 11 against the spring 13, and the tapered surface 11 presses against the upper edge 14, pushing the end surface 7 side of the base end 6 downward, and the arm A gap is not created where the end surface 7 side of the lower surface 15 of the arm 4 floats up due to the weight of the arm 4, etc., and the arm 4 is prevented from hanging down due to the play between the arm 4 and the fitting hole 3, and a correct horizontal posture is maintained. Further, the tip support portion 5 of the arm 4 is pressed against the inner peripheral surface of the annular fluorescent lamp 16 to support the lamp 16. 17 is a lead wire, 18 is a cap base mounting screw, 19 is a lamp socket, and 20 is a lead wire extraction hole, which is formed by a notch at the joint between the cap base and the main body 1 of the device.

When installing the annular fluorescent lamp 16, the lamp support arm 4 is moved back into the device body 1 against the spring 13, and the support part 5 is brought into contact with the inner periphery of the lamp 16. At this time, the spring 13 fixes the lamp 16 in a tensioned state.

With this structure, this lighting fixture has the following effects. That is, (1) Since the tapered surface 11 is engaged with the inner end of the fitting hole 3, the horizontal fulcrum of the lamp support arm 4 is the upper edge 14 of the inner end 3a of the fitting hole 3, which the tapered surface 11 touches. The lower surface of the arm 4 comes into contact with the lower side of the outer end 3b, and the hanging of the arm 4 can be reduced compared to a case without the tapered surface 11.

(2) Since the tapered surface 11 is engaged with the inner end 3a of the fitting hole 3, it is difficult to come off, and lamp replacement etc. are not complicated.

(3) The triangular protrusion 10 further makes it difficult for the lamp support arm 4 to come off, and also prevents the arm 4 from wobbling from side to side, and prevents the lamp 16 from moving in the circumferential direction when the base 2 of the main body 1 is attached to the socket. It doesn't rotate.

Note that the lighting fixture of this invention can also be applied to a fixture body 1 without a base portion 2. Further, the triangular protrusion 10 may also be omitted.

[Effect of idea]

According to this invention, the tapered surface makes it difficult for the lamp support arm to come off, and the hanging of the arm can be reduced, resulting in a good appearance.

[Brief explanation of the drawing]

Figure 1 is a half-sectional view of an embodiment of this invention, Figure 2 is a half-sectional view of an embodiment of this invention.
The figure is an external perspective view, FIG. 3 is a perspective view of the lamp support arm, and FIG. 4 is a cross-sectional view of the arm in a fitted state. DESCRIPTION OF SYMBOLS 1... Instrument main body, 3... Fitting hole, 3a... Inner end, 4... Lamp support arm, 5... Tip support part, 6... Proximal end, 7... End surface, 8... Horizontal slit Groove, 11...Tapered surface, 13...Spring, 14
...Top edge, 16...ring-shaped fluorescent lamp.

Claims (1)

[Scope of utility model registration request] The base end is fitted into a plurality of lamp support arms each having elasticity imparting slit grooves formed horizontally on the end surface of the base end and a tapered surface having a larger height on the end surface side on the upper surface of the base end. A device body is provided with a fitting hole formed in the outer peripheral surface for locking the tapered surface to the upper edge of the inner end, and the device body is provided with a fitting hole to lock the tapered surface to the upper edge of the inner end. A lighting fixture comprising: a spring that presses against the upper edge of the inner end of the fitting hole and presses the tip support portion of the lamp support arm against the inner periphery of the annular fluorescent lamp.