JPS5941535Y2 - coupling device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device used for lighting equipment and the like.

Conventional illumination direction variable lighting equipment is shown in Figures 1 to 5.
As shown in the figure, a box-shaped appliance body 2 with an open bottom is placed on the ceiling surface 1.
is embedded and fixed, and one side of the open-bottom box-shaped reflector plate 3 with the lamp socket 10 fixed to both ends thereof is rotatably connected to an example of the appliance main body 2 with a pin 7, etc., and the screw 4 is attached to the reflector plate 3. The reflector plate 3 is held and fixed at an arbitrary angle (solid line or one-dot chain line) by screwing it into the end plate of the device main body 2 through the angle change hole 3a of the end plate, and the fluorescent lamp 5 is attached to the lamp socket 10. There is.

Next, the connection device portion that rotatably connects the reflector plate 3 to the instrument main body 1 will be described in detail.

In this connection device, a supporting metal fitting 6 bent into a 6-shape is fixed to a reflecting plate 3 by spot welding or the like, and a pin 7 whose base end is bent into an L-shape is inserted into the supporting metal fitting 6 so as to be able to move forward and backward. The tip of the pin 7 is made to protrude from the end plate of the plate 3, the pin 7 is passed through the compression coil spring 8, and the E-ring 9 is fitted into the circumferential groove 7a on the E-ring attachment side of the pin 7. By interposing a compression coil spring 8 between them, the tip of the pin 7 is urged to protrude, and the tip of the pin 7 is inserted into the shaft hole 2a of the end plate of the instrument body 2, and the reflection plate 3 is rotated into the instrument body 2. Connected for free movement.

In this case, by retracting the pin 7 against the compression coil spring 8, the tip of the pin 7 is removed from the shaft hole 2a, and the reflection plate 3 can be attached and detached.

However, in such conventional lighting equipment, when the screw 4 is removed and the reflector plate 3 is placed in the state shown by the two-dot chain line, and the reflector plate 3 is cleaned with a cloth or the like in this state, the pin 7 and the shaft hole 2a are When the frictional force between the pin 7 and the support fitting 6 is smaller than the frictional force between the pin 7 and the support metal fitting 6, the pin 7 moves with the movement of the reflector 3, the tip of the pin 7 comes off the shaft hole 2a, and the reflector 3 may fall. was there.

If you want to eliminate this problem, compression coil spring 8
The spring pressure of the reflector 3 may be increased, the frictional force between the pin 7 and the shaft hole 2a may be increased, or the frictional force between the pin 7 and the support fitting 6 may be reduced. It cannot be said that this can be reliably prevented.

Therefore, an object of this invention is to provide a coupling device that can reliably prevent the inner box from falling.

An embodiment of this invention is shown in FIGS. 6 and 7.

That is, this lighting device is provided with a retaining circumferential groove portion 7b having a width greater than the thickness of the end plate of the device main body 2 at the tip of the pin 7, and other aspects are the same as the conventional example.

As a result of providing the retaining circumferential groove 7b in this way, the pin 7
When the pin 7 retreats and its tip attempts to come off from the shaft hole 2a, the edge of the shaft hole 2a fits into the retaining circumferential groove 7b to prevent the pin 7 from moving further. This prevents the reflective plate 3 from falling.

As described above, the connecting device of this invention is a connecting device that rotatably connects the inner box to the outer box, and includes a cylindrical support fitting fixed to the inner box, and a cylindrical support fitting fixed to the inner box, and a connecting device that moves in and out of the support fitting. A pin that is freely inserted and has a retaining portion at its base end and whose tip protrudes from the end plate of the inner box, a spring that urges the pin to protrude, and a pin that is bored through the end plate of the outer box and that The pin has a shaft hole through which the tip of the pin is inserted, and a circumferential groove provided at the tip of the pin and having a width wider than the thickness of the end plate of the outer box, which has the effect of reliably preventing the inner box from falling. be.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional lighting device, Fig. 2 is a sectional view thereof, Fig. 3 is a sectional view of part I thereof, Fig. 4 is an exploded perspective view of the main part thereof, and Fig. 5 is its assembly. cross section of the state,
FIG. 6 is a perspective view of a main part of a lighting fixture to which an embodiment of this invention is applied, and FIG. 7 is a sectional view of the main part. 2... Instrument body (outer box), 3... Reflector, 6... Support metal fittings, 7... Pin, 7
b: Circumferential groove for retaining, 8: Compression coil spring, E-ring:

Claims (1)

[Scope of utility model registration request] A connecting device rotatably connects an inner box to an outer box, and includes a cylindrical support fitting fixed to the inner box, and a retaining part at the proximal end that is inserted into the support fitting so as to be able to move forward and backward. a pin having a tip whose tip protrudes from the end plate of the inner box; a spring that urges the pin to protrude; a shaft hole drilled in the end plate of the outer box through which the tip of the pin is inserted; and the pin. and a circumferential groove portion provided at the tip of the outer box and having a width wider than the thickness of the end plate of the outer box.