JP2002117701A - Spotlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spotlight for obtaining clear, straight luminous intensity distribution even if light is illuminated from an oblique direction to an illumination surface. SOLUTION: This spotlight is equipped with a reflecting plate 400 detachably fit to a reflecting plate fitting member 300; and a spring 500 arranged inside of the reflecting plate fitting member 300 and pressing the fit reflecting plate 400 in a front direction, the reflecting plate 400 has a recessed reflecting part in which a reflecting surface 411 is formed; and a cylinder part to be fit to the reflecting plate fitting member 300; plural projections formed on the outer circumferential surface, the reflecting plate fitting member 300 has a flange part 310 formed at a front edge, the projections are inserted from notches formed in the flange part 310, the projections are pressed against a supporting part with the spring 500, and thereby, the reflecting plate 400 is fit to the reflecting plate fitting member 300 and made rotatable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a spotlight.

[0002]

2. Description of the Related Art A conventional spotlight is disclosed in
As disclosed in Japanese Patent Application No. 149645, a lamp body provided with an opening on the front surface, a light bulb arranged on the front side of the lamp body, and light emitted from a light bulb arranged on the front side of the lamp body are reflected. A concave reflector, comprising a protective member arranged in front of the bulb and integrated with the reflector, the reflector is
A tubular portion is provided which is inserted from the opening side of the lamp main body and into which a light bulb disposed on the front side of the lamp main body can be inserted, and the tubular portion is provided with a detachable mounting portion for the lamp main body. I have.

[0003]

When the light from the electric bulb is distributed in an elliptical shape among the spotlights, the light axis L is applied perpendicularly to the irradiation surface W as shown in FIG. (See FIG. 4A), the irradiation surface W is irradiated with a clean straight elliptical light (FIG. 4B).
However, if the irradiation surface W is irradiated with the optical axis obliquely (see FIG. 4C), the irradiation surface W is not irradiated with a clear straight elliptical light (see FIG. 4). (D)
reference). This is a problem in the production of light. The spotlight described in the above-mentioned conventional Japanese Patent Application Laid-Open No. 2000-149645 also has the same problem. It is only necessary to use a reflector that irradiates the irradiation surface W with light obliquely so that a beautiful elliptical light is irradiated.
It is not realistic from the viewpoint of cost and product management to use various kinds of dedicated reflecting plates according to the irradiation angle and irradiation distance.

The present invention has been made in view of the above circumstances, and provides a spotlight capable of obtaining a clean and straight light distribution even when light is irradiated from an oblique direction to an irradiation surface. It is an object.

[0005]

According to the present invention, there is provided a spotlight comprising: a light body provided with an opening on a front surface; a light bulb connected to a socket provided inside the light body;
A reflector mounting member disposed inside the light body so as to surround the light bulb, and a reflector that reflects light emitted from the light bulb and that is detachably attached to the reflector mounting member. And a spring disposed inside the reflector mounting member and pressing the mounted reflector in the front direction. The reflector has a concave reflector having a reflective surface, A cylindrical portion that is provided on the base end side of the portion and that fits into the reflector attaching member;
The reflection plate mounting member has a flange portion formed on a front edge, and the projection is inserted from a cut portion formed in the flange portion, and the support is a portion where the cut portion is not formed. When the projection is pressed by the spring toward the portion, the reflection plate is mounted on the reflection plate mounting member, and the projection is formed smaller than the support portion so as to be rotatable.

[0006]

FIG. 1 is a schematic sectional view of a spotlight according to an embodiment of the present invention, and FIG. 2 is a drawing of a reflector used in the spotlight according to the embodiment of the present invention. FIG. 1A is a schematic horizontal partial cross-sectional view, and FIG.
FIG. 3C is a schematic bottom view, FIG. 3C is a schematic enlarged view of a projection, and FIG. 3 is a drawing of a reflector attaching member used in the spotlight according to the embodiment of the present invention. FIG. 1B is a schematic plan view, FIG. 1B is a sectional view taken along line AA of FIG.
FIG. 3C is a schematic bottom view.

[0007] A spotlight according to an embodiment of the present invention includes a light body 100 having an opening at the front, a bulb 200 connected to a socket 110 provided inside the light body 100, Reflector mounting member 3 arranged in a state surrounding the bulb inside
00, a reflector 400 for reflecting the light emitted from the bulb 200, and a reflector 400 removably attached to the reflector mounting member 300;
0, and a spring 500 for pressing the mounted reflector 400 in the front direction. The reflector 400 includes a concave reflector 410 having a reflective surface 411 formed thereon, and a reflector 410 having a concave surface. And a cylindrical portion 420 that is provided on the base end side of the cylindrical portion 410 and fits into the reflective plate mounting member 300.
21 is formed, and the reflector attaching member 300 has a flange portion 310 formed on the front edge thereof.
21 is inserted and the projection 421 is pressed by the spring 500 toward the support portion 312 where the notch 311 is not formed.
0 is attached to the reflector attaching member 300 and the protrusion 421
Is formed smaller than the support portion 312 so that it can rotate.

The light body 100 is formed in a cylindrical shape with a bottom as an opening having an open front surface, and a socket 110 to which a light bulb 200 is connected is provided at the bottom inside. The rear surface of the light main body 100 is formed in a substantially hemispherical shape from the viewpoint of a design surface. Further, a slit hole (not shown) for heat radiation is opened at a rear portion of the light main body 100.

The light body 100 is attached to the tip of an arm 610 rotatably extending from a substantially rectangular parallelepiped base 600 attached to a ceiling surface, a wall surface, or the like. The light main body 100 can be tilted with respect to the arm 610. The base 600 has a built-in transformer (not shown) for reducing the voltage of the commercial power supply to 12 V corresponding to the bulb 200. The transformer and the socket 1 are provided inside the arm 610.
Wiring for connecting to the device 10 is built in.

The light bulb 20 connected to the socket 110
0 is set to a size such that when mounted on the socket 110, the tip slightly projects from the opening of the light body 100. As described above, this light bulb 200
This is a halogen lamp to which a voltage of 2 V is applied. As described above, in the case of a halogen lamp having a low pressure of about 2.5 atm or less, the International Electrotechnical Commission (INTERNATIONAL ELECTR
OTECHNICAL COMMISSION) stipulates that there is no need to provide a protective shield (protective member). For this reason,
The reflection plate 400 described later has an open front surface without providing a protective shield.

On the other hand, the reflecting plate 400 is made of glass, and as shown in FIG. 2, is provided with a concave reflecting portion 410 on which a reflecting surface 411 is formed, and provided on the base end side of the reflecting portion 410. Cylindrical part 42 fitted in reflector attaching member 300
0. A plurality of parallel irregularities for distributing the light from the light bulb 200 in an elliptical shape are formed on the inner surface of the reflector 410.

The inner diameter of the cylindrical portion 420 is
Since the outer diameter is set to be larger than 0, the light bulb 200 can be inserted inside. Four protrusions 421 are formed on the outer peripheral surface of the cylindrical portion 420 at a plurality of intervals of 90 °.

As shown in FIG. 2C, the projection 421 has both side surfaces 421A and 421B perpendicular to each other,
The side facing the front side of 00 is a tapered side 421C and a flat side 421D. The four projections 421 are provided with the tapered sides 421D in the same direction.

The reflection plate mounting member 300 is made of aluminum die-cast and is formed in a substantially cylindrical shape as shown in FIG.
An inwardly facing flange portion 310 is formed on a front edge facing the opening side. Since the inner diameter of the flange portion 310 is set slightly larger than the outer diameter of a cylindrical portion 420 of the reflecting plate 400 described later, the cylindrical portion 420 can enter.

The flange 310 has a 90 ° angle.
Four notches 311 are formed at intervals. The notch 311 is a portion into which a projection 421 of the reflecting plate 400 described later enters. Further, the support portion 312 is a portion between the cut portions 311, that is, a portion where the cut portions 311 are not provided.

On the rear side of the support portion 312, a wall portion 312A for preventing the projection 421 of the reflection plate 400 from entering.
And the regulating wall 3 which is high enough to allow the protrusion 421 to enter.
12B. Therefore, the wall 312A is formed larger than the regulating wall 312B. The wall portion 312A has a large side surface 421A of the inserted protrusion 421.
On the side (on the left side when viewing the reflector mounting member 300 from the front), the regulating wall 312B is provided on the small side surface 421B side of the inserted projection 421 (on the right side when viewing the reflector mounting member 300 from the front). ing.

That is, when the projection 421 that has entered the inside from the cutout 311 is rotated in the direction of the regulating wall 312B while being pushed toward the spring 500, which will be described later, it is supported over the regulating wall 312B. Part 3
12 are inserted into the rear side. However, the projection 421 cannot rotate to the wall side.

Further, the wall portion 312A and the regulating wall 312
B is set larger than the protrusion 421. For this reason, the protrusion 421 that has passed over the regulating wall 312B can move between the wall portion 312A and the regulating wall 312B. Therefore, the reflecting plate 400 can be rotated by an angle corresponding to the angle between the wall 312A and the regulating wall 312B.

At the rear end of the outer peripheral surface of the reflecting plate mounting member 300, inward locking portions 313 are projected at 90 ° intervals. The locking portion 313 is used for the reflection plate mounting member 3.
When viewed from the front, the locking portion 313 which is located on the back side of the cut portion 311 is provided with a reflector 500 in a state where a spring 500 described later is sandwiched between the spring portion 500 and a flange portion 310. It is to be locked inside the mounting member 300.

Further, a pair of tongue pieces 314 are provided at 180 ° intervals on the rear end side of the reflector attaching member 300. The tongue piece 314 is a part for attaching the reflector attaching member 300 to the light main body 100, and has a screw hole 314A. In addition, four slits for heat radiation are provided on the side surface of the reflector attaching member 300. This slit has a large slit 320A
And a small slit 320B. The large slit 320A is located on the back side of the support portion 312,
0B is provided on the back side of the cutout 311 respectively.

The spring 500 is a so-called coil spring.
It can be attached in a slightly contracted state between 0 and the locking portion 313. When the spring 500 is attached to the reflector attaching member 300, the spring 500 faces the cutout 311.

Next, a procedure for attaching the reflection plate 400 to the spotlight composed of various components as described above will be described. First, the four protrusions 421 are inserted into the interior of the reflector attaching member 300 from the four cutouts 311. Then, each projection 421 comes into contact with the spring 500 built in the reflector attaching member 300. Further, the reflection plate 300
Is pushed inward, the spring 500 contracts. When the reflector 400 is rotated rightward in this state,
The protrusion 421 passes over the regulating wall 312B in the order of the small side surface 412 → the tapered side 421C → the flat side 421D. When the regulating wall 312B reaches the large side surface 421A, the user releases his / her hand to release the force pressing the spring 500. Then, the reflection plate 400 is pressed against the rear surface side of the support portion 312 of the flange portion 310 by the elastic force of the spring 500. Thus, the reflection plate 400 is attached to the reflection plate attachment member 300, that is, to the light main body 100.

Here, the projections 421 are connected to the wall 312A.
The protrusion 421 can move between the wall 312A and the regulating wall 312B because the distance between the regulating wall 312B and the regulating wall 312B is smaller. Therefore, the reflecting plate 400 can rotate by an angle corresponding to the angle between the wall 312A and the regulating wall 312B.

The rotation of the reflection plate 400 makes it possible to obtain a clean and straight elliptical light distribution even when light is incident on the irradiation surface from an oblique direction.

The heat generated from the light bulb 200 is radiated from the open front side of the reflection part 410 of the reflection plate mounting member 300, and is transmitted from the above-mentioned 320 A and 320 B through the gap between the cylindrical part 420 and the light bulb 200. Released. The heat emitted from the slits 320A and 320B is transmitted to the gap between the light body 100 and the reflection plate 400 and the light body 10
0 is released to the outside through the slit hole provided at the rear part of the zero.

To change the light distribution of the elliptical light, the reflector 400 is rotated. By this rotation, the reflection plate 40
Since the angles of the plurality of parallel concave and convex portions formed on the inner surface of the zero reflection portion 410 change, the light distribution can be changed.

In the above-described embodiment, the protrusion 42
1, the notch 311 and the support 312 are each 90 °
Are provided at four intervals, but three may be provided at 120 ° intervals. In addition, if at equal intervals,
Of course, five or more may be provided. In this case, the smaller the number, the more widely the light distribution can be changed.

The reflection plate 400 does not necessarily obtain an elliptical light distribution, but may obtain a perfect circular light distribution or other shapes of light distribution.

[0029]

According to the present invention, there is provided a spotlight having a light body provided with an opening on a front surface, a light bulb connected to a socket provided inside the light body, and a light bulb surrounding the light bulb inside the light body. A reflector mounting member arranged in an inset state, for reflecting light emitted from the light bulb, a reflector detachably mounted on the reflector mounting member, and inside the reflector mounting member. Placed,
A spring for pressing the mounted reflector in the front direction, wherein the reflector is provided on a concave reflection portion having a reflection surface, and provided on a base end side of the reflection portion; A cylindrical portion fitted into the member, a plurality of protrusions are formed on the outer peripheral surface of the cylindrical portion, the reflector mounting member has a flange portion formed on the front edge,
The projection is inserted from a cut portion formed in the flange portion, and the projection is pressed by a spring toward a support portion which is a portion where the cut portion is not formed, so that the reflection plate is attached to the reflection plate. The projection is mounted on a member, and is rotatable by being formed smaller than the support portion.

For this reason, in this spotlight, in the case of a reflector for distributing light from a light bulb in an elliptical shape, even if the optical axis is obliquely illuminated on the irradiation surface, the reflector may be used. By rotating, it becomes possible to irradiate the irradiation surface with clean elliptical light.

Further, since the light bulb is a low-pressure halogen lamp and has no protective member provided on the front surface of the reflector, heat generated from the light bulb is also radiated from the open front surface of the reflector. Can be. For this reason, the life of the light bulb can be made longer than that of a light bulb in which the front surface of the reflector is closed by the protective member.

Further, on the side surface of the reflector attaching member,
Since the heat-dissipating slits are provided, the heat generated from the bulb is released not only from the front surface of the reflector but also from the slits, so that the life of the bulb can be prolonged.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a spotlight according to an embodiment of the present invention.

2A and 2B are drawings of a reflector used for a spotlight according to an embodiment of the present invention, wherein FIG. 2A is a schematic horizontal partial cross-sectional view, FIG. 2B is a schematic bottom view, FIG. 3C is a schematic enlarged view of the protrusion.

3A and 3B are drawings of a reflector attaching member used for the spotlight according to the embodiment of the present invention, wherein FIG. 3A is a schematic plan view, and FIG. A sectional view taken along line AA, and FIG. 3C is a schematic bottom view.

FIG. 4 is a schematic explanatory view showing a problem of a conventional spotlight.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Light main body 200 Light bulb 300 Reflector attaching member 310 Flange part 311 Cut part 312 Support part 400 Reflector 410 Reflecting part 411 Reflecting surface 420 Cylindrical part 421 Projection 500 Spring

Claims (3)

[Claims] 1. A light body provided with an opening on a front surface, a light bulb connected to a socket provided inside the light body, and a reflector disposed inside the light body so as to surround the light bulb. An attachment member, which reflects light emitted from the light bulb, a reflector detachably attached to the reflector attachment member, and a reflector arranged and mounted inside the reflector attachment member. And a spring for pressing the reflecting plate in the front direction, wherein the reflecting plate is provided on a concave reflecting portion having a reflecting surface and a base end side of the reflecting portion, and is fitted to the reflecting plate mounting member. A plurality of protrusions are formed on the outer peripheral surface of the cylindrical portion, and the reflector attaching member has a flange formed on a front edge. The protrusion is formed from the cut portion The projection is pressed by the spring toward the support portion which is inserted and the cut portion is not formed, whereby the reflector is attached to the reflector mounting member, and the protrusion is formed smaller than the support portion. The spotlight is characterized in that it can be rotated by being turned on. 2. The spotlight according to claim 1, wherein the light bulb is a low-pressure halogen lamp and has no protective member provided on a front surface of a reflector. 3. A heat-dissipating slit is provided on a side surface of the reflector attaching member.
Or the spotlight of 2.