JPH0134243Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Technical Field This invention relates to a decorative frame attached to a shade for a lighting fixture.

b. Prior Art As shown in FIGS. 9 and 10, the conventional decorative frame 1 has a groove 2 in which a lighting fixture shade (hereinafter referred to as
It is simply called Sade. ) 10 is fitted into one side wall 3 of the groove 2.
A claw portion 4 protruding from a suitable location is hooked onto the flange portion 11 and is then locked onto the shade 10.

In order to prevent such a decorative frame 1 from falling off from the shade 10, the catching width h between the claw part 4 and the flange part 11 should be made sufficiently large.
In order to prevent the claw portion 4 from slipping off the flange portion 11 due to the weight of the decorative frame 1, it is effective to make the lower surface 4a of the claw portion 4 a horizontal surface as shown.

However, since the flange 4 is fitted under the claw 4 while deforming the shade 10, the larger the protrusion width a of the claw 4, the more difficult it becomes to fit the flange 11 under the claw 4. If it is too large, it will be impossible to fit it in. In order to avoid this, the groove width dimension b of the groove part 2 should be made larger in proportion to the protrusion width a of the claw part 4, but if you do this,
This increases the size of the decorative frame 1, which is not desirable.

In addition, when the claw portion 4 whose lower surface 4a is a horizontal surface is integrally injection molded with the groove portion 2 using synthetic resin, a mold for molding the groove portion 2 including the claw portion 4 is provided as shown in FIG. It is divided into a first mold 20 for molding one side of the groove 2 and a second mold 21 for molding the other side of the groove 2, and when releasing the mold, the second mold 21 is After pulling out the first mold 20 from the groove 2 as shown by the arrow I need to pull it out.
Therefore, if the protruding width a (see FIG. 10) of the claw portion 4 is made too large, the second mold 20 cannot be pulled out from the groove portion 2.

In this way, due to problems in workability and molding technology when attaching the decorative frame 1 to the shade 10, the claws 4 are
There are restrictions on increasing the protrusion width a of the claw part 4, and in reality, the protrusion width of the claw part 4 can be increased within a range that allows the flange part 11 to be fitted into the groove part 2 and does not make it difficult to release the mold after molding. By making a as large as possible, the decorative frame 1 is prevented from falling off. but,
After installation, a gap S is created between the shade 10 and the decorative frame 1, and it is impossible to avoid the decorative frame 1 from shaking, so the protrusion width a as described above is
However, there was a problem in that the catching width h was not sufficiently large to reliably prevent falling off. In addition, as mentioned above, the mold for forming the groove 2 has to have a complicated structure of a two-piece assembly method, and furthermore, it is necessary to perform a complicated mold release process of sliding the mold when releasing the mold. Therefore, there was a problem in that the mold manufacturing cost and the molding cost soared.

c. Purpose of the invention This invention is to improve the above-mentioned problems. By attaching the decorative frame to the shade in a different manner than before, the decorative frame can be attached to the shade even if the protruding width of the claw part is small. To provide a decorative frame that does not have to worry about falling off or shaking, can simplify the structure of a mold for molding, and can simplify a mold release process after molding.

d. Structure and effect of the invention In order to achieve the above object, the decorative frame of this invention engages the flange on one side wall of the groove into which the flange provided at the outer peripheral end of the shade for a lighting fixture fits. The width of the flange and the groove width of the groove are such that the flange fitted into the groove presses against one side wall of the groove. In addition, the lower surface of the claw part and a predetermined part of the other side wall of the groove part, including the part facing the claw part, are sloped surfaces, and the angle of inclination of the predetermined part with respect to the virtual vertical plane is the same as the virtual vertical plane. It is characterized in that the angle is set at an angle not smaller than the inclination angle of the lower surface with respect to the surface.

With this configuration, according to this invention, the decorative frame is fixed to the flange of the shade without wobbling, so even if the protruding width of the claw that engages with the flange is small, There is no need to worry about the claw part falling off from the flange part. Furthermore, even if the mold for injection molding the groove and the pawl is made of one member, when releasing the mold after molding, the mold must be moved diagonally along the lower surface of the pawl and the above-mentioned inclined portion. Since it can be easily pulled out in the direction, the mold structure does not become complicated as in the past, and the mold release process is simplified, reducing mold manufacturing costs and molding costs.

e Example Fig. 1 is an exploded perspective view partially showing a decorative frame 1 and shade 10 as an example of this invention, and Fig. 2 is a partial sectional view showing the decorative frame 1 attached to the shade 10. be. The decorative frame 1 is provided with a groove 2, and a claw 4 is protruded from a predetermined location on one side wall 3 of the groove 2. The lower surface 4a of the claw portion 4 is an inclined surface. Further, a predetermined portion 5a including a portion of the other side wall 5 of the groove portion 2 facing the claw portion 4 is also an inclined surface.

Here, the inclination angle θ ₁ of the inclined portion _5a with respect to the virtual vertical plane f shown in FIG. It's set at a rather large angle. If the inclination angle θ ₁ is the same as the inclination angle θ ₂ , the inclined portion 5a and the lower surface 4a will be parallel, and if the inclination angle θ ₁ is larger than the inclination angle θ ₂ , the inclined portion 5a and the lower surface 4a will be parallel to each other. The lower surface 4a is expanded upward. Further, the groove width dimension b of the groove portion 2 shown in FIG.
The width dimension is set to be the same or almost the same as the width dimension of the groove 2, and when the flange 11 is fitted into the groove 2 as shown in the figure, the flange 11 is pressed against the side wall 3 of the groove 2. It is configured.

In the above configuration, as shown in Fig. 2, the decorative frame 1
The flange 11 of the shade 10 is fitted into the groove 2 of the
When the flange 11 is pressed against the side wall 3 of the groove 2, the decorative frame 1 is fixed to the flange 11 without wobbling, so that the outer end 11 of the flange 11 is pressed against the side wall 3 of the groove 2.
Even if only part a is caught on the claw part 4, the claw part 4 engaged with the flange part 11 will not come off from the flange part 11 due to the weight of the decorative frame 1 or the like. In particular, as in the decorative frame 1 of FIGS. 1 and 2, rib portions 5b are provided between adjacent inclined portions 5a.
If this is provided, the flange 11 fitted into the groove 2 will be held between the rib 5b and the side wall 3, and the flange 11 will be strongly pressed against the side wall 3. Therefore, the claw portion 4 becomes more difficult to come off from the collar portion 11. Therefore, the protrusion width a of the claw portion 4
Of course, if the projection width a is sufficiently large, there is no fear that the decorative frame 1 will fall off the flange 11 even if the protrusion width a is made small. If the protruding width a of the claw portion 4 is made small, it becomes easier to fit the collar portion 11 into the groove portion 2, thereby improving the workability of attaching the decorative frame 1.

When the decorative frame 1 having the above configuration is injection molded using synthetic resin, the mold for molding the groove portions 2 and the claw portions 4 can be constructed from one member. That is, one mold is provided with molding surfaces for the groove portion 2 and the claw portion 4, and after the decorative frame 1 is injection molded using this mold, this mold is placed on the inclined portion 5a and the lower surface 4a of the claw portion 4. All you have to do is pull it out in the direction along it to release it from the mold. In this case, the claw portion 4
If the protrusion width a of the claw portion 4 is small, it is easier to release from the mold than if the protrusion width a is large, so there is an advantage in terms of molding technology as well by reducing the protrusion width a of the claw portion 4.

In the decorative frame 1 in FIGS. 1 and 2, the inclined portion 5
a is made longer and rib portions 5b are provided between adjacent inclined portions 5a, but as in the decorative frame 1 of FIGS. 4 and 5, the portion of the other side wall 5 facing the claw portion 4 Only the inclined portion 5a may be used.
Even with such a decorative frame 1, the flange 11 fitted into the groove 2 is held between the portion 5c other than the inclined portion 5a and the side wall 3, so that the above-mentioned FIGS. 1 and 2 The same effect as the decorative frame 1 shown in the figure is exhibited. However, from the perspective of the molding technology, it is easier to adjust the clamping force on the flange 11 in the decorative frame 1 shown in FIGS. 1 and 2. Further, as in the decorative frame 1 shown in FIG. 6, the entire length of the other side wall 5 including the portion facing the claw portion 4 may be an inclined portion 5a. Also in such a decorative frame 1, the flange 11 fitted into the groove 2 is held between the other side wall 5 and the one side wall 3, so that even if the protruding width of the claw 4 is small, the claw 4 will not fit into the flange. There is no need to worry about being left out of Division 11. When using the decorative frame 1 shown in the figure, the inner end 1 of the flange 11
A protrusion 12 is provided at a predetermined location of 1b, and this protrusion 12
If the structure is such that it is pressed against the other side wall 5,
Since the outer end 11a of the flange 11 is strongly pressed against the side wall 3, there is an advantage that the claw 4 becomes more difficult to come off from the flange 11. Further, since the protrusion 12 pressed against the other side wall 5 is in contact with the inclined portion 5a, it also has the effect of strongly pressing the flange portion 11 against the claw portion 4, which is also useful for making rattling less likely to occur. Of course, in this case, the decorative frame 1 may have the structure shown in FIG.

FIG. 7 is an overall side view showing the shade 10 to which the decorative frame 1 of this invention is attached, and FIG. 8 is an overall plan view showing the shade 10. In these figures, 13 is a lamp insertion hole. Although FIGS. 7 and 8 show the decorative frame 1 having a rectangular shape, it goes without saying that the decorative frame 1 may have a rectangular, diamond-shaped, circular, or other shape. It is.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view partially showing a decorative frame and shade that are an embodiment of this invention, Fig. 2 is a partial sectional view showing the decorative frame attached to the shade, and Fig. 3 is a partial sectional view of the decorative frame. 4 is a partial perspective view showing a modified example of the decorative frame, FIG. 5 is a plan view of the decorative frame shown in FIG. 4, and FIG. 6 is a state in which a decorative frame according to another modified example is attached to the shade. 7 is an overall side view showing a shade with a decorative frame according to this invention attached, FIG. 8 is an overall plan view showing the shade, and FIG. 9 is a partial view of a conventional decorative frame and shade. FIG. 10 is a partial cross-sectional view showing a state in which a conventional decorative frame is attached to a shade, and FIG. 11 is a schematic cross-sectional view for explaining the case of releasing from a conventional injection-molded decorative frame. It is a diagram. DESCRIPTION OF SYMBOLS 1... Decorative frame, 2... Groove, 3... One side wall of the groove, 4... Claw, 4a... Lower surface of the claw, 5a...
Inclined point, 10...shade, 11...flange, b...
...Groove width dimension of the groove portion, f...Virtual vertical plane, θ ₁ ...Inclination angle of the inclined part, θ ₂ ...Inclination angle of the lower surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A shade for a lighting device, which comprises a groove provided at the outer peripheral end of the shade for a lighting device, into which the flange fits, and a claw portion that engages with the flange provided on one side wall of the groove. In this decorative frame, the width of the flange and the width of the groove are determined so that the flange fitted into the groove presses against one side wall of the groove, and the width of the claw is The lower surface and a predetermined portion of the other side wall of the groove including a portion facing the claw portion are sloped surfaces, and an angle of inclination of the predetermined portion with respect to a virtual vertical plane is an angle not smaller than an angle of inclination of the lower surface with respect to the virtual vertical plane. A decorative frame for shades for lighting equipment.