JPH0247535Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shade, particularly a shade for a projector or the like.

Known shades of this type have no ventilation or water holes in the base of the shade itself. Therefore, the heat generated by the light bulb is accumulated in the space inside the shade due to the poor heat dissipation efficiency of the shade. As a result, the temperature in the space inside the shade rises above the heat-resistant temperature of the sealing member, causing the sealing member to deteriorate and be damaged by the heat, resulting in damage to the sealing member and, ultimately, rainwater from the shade installed outdoors to the socket. There was a danger that it would flow into Furthermore, although it is in a different technical field from floodlights and the like, incandescent light stands for general household use that have ventilation holes in their shades are known (Japanese Utility Model Publication No. 104187/1987). However, it is impossible to cool the cap by passing water through it, and there is no packing provided on the outside of the cap, which is a completely different technology.

The present invention has been made in view of these points.

The purpose of this invention is to create a structure for the shade that increases the breathability and water permeability of the shade, suppresses the temperature rise in the space inside the shade, prevents damage to the sealing member, and guarantees waterproofing of electrical contact parts. .

The problem of the present invention is solved by the configuration of the characteristic part of claim 1 of the utility model registration claim.

The present invention will be explained based on illustrated embodiments.

FIG. 1 shows a side view of a shade according to the invention.

A light bulb 1 is inserted into a partially shown socket 2. The socket 2 is attached to the lamp body 3 via a board (not shown). The lamp body 3 is connected to the shade 10 integrally or via the connecting member 4 and packing 5.
is combined with In the illustrated case, the lamp body 3 and the shade are connected via the packing 5 by tightening the washer 6, the screw 7, and the female thread of the burring portion 10c of the shade 10. In the illustrated embodiment, the connecting member 4 has a longitudinal section L
The shape is caulked to the lamp body 3, and the corner part is attached to the lamp body 3.
It is welded to 4a.

The outer edge 5a of the packing 5 is folded back radially inward, so that the outer periphery of the connecting part 4 is completely closed off by the packing 5. This configuration completely blocks rainwater from leaking into the lamp body 3 and the shade 10 from outside. Inner edge of packing 5
b is crimped to the outer periphery 1a of the light bulb 1 in a range close to the socket 2 over a certain length outward from the socket 2, thereby making the space between the shade 10 and the light bulb 1 completely airtight and watertight. It's blocked.

The shade 10 is provided with ventilation holes and water passage holes 11 of various shapes as shown in FIGS. 2a to 2e.

In the embodiment according to FIG. 2a, the ventilation and water holes are circular holes 11a. An appropriate number of circular holes 11a are provided. The inner edge of the circular hole 11a in the radial direction of the shade 10 is located in a range close to the base portion 10a of the shade 10 or the inner circumferential surface of the lamp body 3 and near the outer circumferential edge 5a of the packing 5. The radially outer inner edge of the shade 10 of the circular hole 11a is located at the base portion 10a of the shade 10 or the inclined portion 10b of the shade 10. The radially inward inner edge of the shade 10 of the circular hole 11a is located at the base portion 10a of the shade 10 so that the ventilation hole and the water passage hole are separated by the outer surface of the bulb 1 and the inner surface of the shade 10 as much as possible. This is because providing the shield at the back of the shade interior space improves the ventilation and water permeability of the shade interior space, and is effective in avoiding heat accumulation and water accumulation.

In the embodiment according to FIG. 2b, the ventilation holes and water passage holes 11 are a suitable number of elongated holes 11b extending in the circumferential direction. The radially inner inner edge of the elongated hole 11b of the shade 10 is located at the base portion 10a of the shade 10.
The radially outer inner edge of the shade 10 of the elongated hole 11b is the base portion 10 or the base portion 10a of the shade 10.
It extends further beyond the sloping portion 10b of the shade 10.

In the embodiment according to FIG. 2c, the ventilation and water holes 11 are elongated holes 11 extending in the radial direction of the shade 10.
It is c. The radially inward inner edge of the long hole 11c is the base portion 10a of the shade 10 and is located in the range of the outer peripheral edge 5a of the packing 5, and the radially outward inner edge is located in the base portion 10a of the shade 10 or in the range of the outer peripheral edge 5a of the packing 5. It extends beyond and extends to the sloped portion 10b of the shade 10.

In the embodiment according to FIG. 2d, the ventilation and water holes 11 are rectangular holes 11d starting from the base part 10a of the shade 10 and extending to the inclined part 10b of the shade 10. The rectangular hole can be provided so as to extend in the circumferential direction, or it can be formed in a square outside the rectangle or a polygon other than a quadrangle, and the hole can be provided only in the base portion 10a of the shade 10 or beyond the base portion 10a. shade 1
0 can also extend to the inclined portion 10b.

In the embodiment according to FIG. 2e, the ventilation and water holes 11 are trapezoidal holes 1 extending in the radial direction of the shade 10.
1e. The trapezoidal hole 11e can also be oriented in the circumferential direction. In addition to the various embodiments described above, the ventilation holes and water passage holes 11 can be formed as various holes having the same or different shapes. A suitable number of holes are provided.

FIG. 3 shows an embodiment of a shade 10' having a longitudinal cross-sectional shape of an inclined section or a circular shape. The other shapes and arrangements of the ventilation holes and the water passage holes 11' are the same as those in the embodiment shown in FIGS. 2a to 2e, so their explanation will be omitted. It is essential that the ventilation holes and water holes start from the area of the packing ring of the shade.

In the shade according to the present invention, ventilation holes and water passage holes 11
is opened in the shade starting from the inner part of the shade space defined by the outer surface of the bulb and the inner surface of the shade, so water permeability and water permeability are maintained regardless of the various elevation and depression angles of the light projection axis of the projector. Excellent and
There is no thermal damage to the sealing member, and the risk of water intrusion into the socket is eliminated. Since suitable heat dissipation and drainage properties of the shade are thus ensured, the life of the sealing member and thus of the shade and the electrical contact member is extended.

In addition to the illustrated embodiment, the individual ventilation holes and water passage holes may be large, so that the shade may be formed in the shape of a coarse or dense basket.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional side view of an embodiment of the shade according to the present invention, FIGS. 2a to 2e are front views of the shade showing various embodiments of ventilation holes and water holes, and FIG. 3 is a side view of the shade according to the present invention. FIG. 6 shows a vertical cross-sectional side view of another embodiment of the shade according to the present invention. Reference numerals in the figure: 10...shade, 10a...base portion, 10b...slanted portion, 11...ventilation hole and water passage hole.

Claims (1)

[Scope of claims for utility model registration] (1) In shades for floodlights, etc., shade 1
0 is connected to the lamp body 3 via the outer edge 5a of a packing 5 which is folded back inward in the radial direction so as to surround the outer peripheral edge of the connection member 4 of the lamp body, and a light bulb is housed inside the shade 10. The outside range of the socket 2 and the shade 1 on the outer periphery 1a of the bulb are
0 or the lamp body 3, and the outer edge 5a of the packing 5 and the packing 5b are integrally formed,
And an appropriate number of ventilation holes and water holes 11 are shade 1
0 base portion 10a or base portion and inclined portion 10b
A shade that is characterized by being provided across. (2) The shade according to claim 1, wherein the ventilation hole and the water passage hole 11 of the shade 10 are circular holes 11a. (3) The shade according to claim 1, wherein the ventilation hole and the water passage hole 11 of the shade 10 are elongated holes 11b extending in the circumferential direction. (4) The shade according to claim 1, wherein the ventilation hole and the water passage hole 11 of the shade 10 are long holes 11c extending in the radial direction. (5) The shade according to claim 1, wherein the ventilation holes and water holes 11 of the shade 10 are square holes 11e extending in the radial direction or square holes extending in the circumferential direction. (6) The shade according to claim 1, wherein the ventilation holes and water passage holes 11 of the shade 10 are trapezoidal holes 11e extending in the radial direction or trapezoidal holes extending in the circumferential direction. (7) Utility model registration claim No. 1, in which the ventilation holes and water passage holes 11 of the shade 10 are identical or irregularly shaped holes facing in the radial direction, circumferential direction, or any direction.
The shade mentioned in the section.