JPH07169303A - Spot light - Google Patents

Abstract

PURPOSE:To facilitate replacement of a lamp and prevent light leakage through heat radiating holes. CONSTITUTION:A light source unit 3 having a lamp 3a and a reflector 3b in an integral manner is disposed in a body 1. A light projecting lens 7 is attached to a cover 2. The cover 2 is openably pivoted by the body 1. The light source unit 3 is guided by guide rods 6 interposed between a pair of fixed plates 5a in a lengthwise movable fashion. Heat radiating holes 1e are formed in portions on the circumferential wall of the body 1 where light is shut off from the lamp 3a by the front fixed plate 5a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spotlight for floodlight used for stage lighting, banquet lighting and the like.

[0002]

2. Description of the Related Art Conventionally, as a spotlight of this type, as shown in FIG. 7, a spotlight is provided with a case formed in a substantially rectangular parallelepiped shape by a body 1'and a cover 2 ', and an arm 10 is attached to the case. There is. A lamp and a reflector are housed in the case, and the cover 2'is detachably attached to the upper part of the body 1'so that the lamp can be replaced. Further, the arm 10 is formed in a substantially U shape, and a body 1'is held between both leg pieces of the arm 10 so that the light projecting direction can be changed, and the arm 10 projects upward with respect to the case.

[0003]

In the spotlight having the above structure, since the arm 10 is located above the body 1 ', when the cover 2'is tried to be attached or detached to replace the lamp, the arm 10 will be removed. The problem of getting in the way arises. There is also a cover 2'provided at the rear of the body 1 ', but it is common to take out light from the front side of the case, and a reflector is arranged behind the lamp. In the case where the cover 2'is provided at the rear portion of the body 1 ', the replacement work of the lamp is troublesome.

Therefore, in this type of spotlight, it is required to facilitate the replacement work of the lamp. Furthermore, in this type of spotlight, prevent the optical axis from being displaced from the optical system when the lamp is replaced, and prevent light from leaking through the heat radiation holes for letting the radiant heat of the lamp out of the case. It is required that the case can be opened and closed smoothly when replacing the lamp.

The present invention is aimed at satisfying the above-mentioned requirements, and facilitates the replacement work of the lamp, prevents the optical axis from being displaced from the optical system during the replacement of the lamp, and further radiates heat. It is an object of the present invention to provide a spotlight that prevents light leakage from the hole and that allows the case to be opened and closed smoothly.

[0006]

In order to achieve the above object, the invention of claim 1 is such that a light emitting lens is provided on a part of the peripheral wall and the other end is opened and closed so that one end of the cover can be opened and closed. The case consists of a body that pivots the part, and a lamp that is attached to the body on the optical axis of the light projecting lens. A reflector is provided integrally with the lamp on the side opposite to the light projecting lens with the lamp in between. A light source unit, a movable base that detachably holds the light source unit, a guide rod that guides the movable base movably in the optical axis direction of the projection lens, and a drive source that moves the movable base along the guide rod. And a pair of fixing plates that are fixed to predetermined portions in the body so as to face each other and that fix the respective end portions of the guide rods, and at least one of the fixing plates is used to block the light from the lamp. A heat dissipation hole is provided through the peripheral wall. Characterized by comprising Te.

According to a second aspect of the present invention, in the first aspect of the present invention, a part of the fixing plate, which is farther from the pivotally connecting portion between the cover and the body, protrudes toward the cover side, and the fixing plate protrudes. It is characterized in that a pair of guide portions for guiding the cover are provided at both ends of the portion so as to be inclined toward the cover so as to reduce the mutual distance.

[0008]

According to the structure of claim 1, since the cover provided with the projection lens and the body provided with the lamp are pivotally attached to each other, the body opened and closed with respect to the cover serving as the lamp body is provided. The lamp will be installed and replacement of the lamp will be easier. That is, the arm for attaching the case is provided on the cover side that is the lamp body, and the body can be opened and closed with respect to the cover without being disturbed by the arm, and as a result, the lamp replacement work can be performed. It will be easier. Further, since the lamp and the reflector are integrated to form a light source unit, and the light source unit is guided by the guide rod in the optical axis direction of the projection lens, the deviation of the optical axis between the lamp and the reflector is caused. It is possible to prevent the deviation of the optical axis between the light projecting lens and the lamp, and it is possible to prevent the deviation of the optical axis between the lamp and other optical systems when the lamp is replaced. .
Furthermore, since the heat radiation hole is shielded by the fixing plate provided to fix the guide rod that guides the lamp,
In addition to preventing light from leaking out from the heat radiation hole to the outside of the case, the fixing plate also serves as a support for the guide rod and light blocking of the heat radiation hole. The cost will be reduced.

According to the structure of claim 2, since the guide is provided on the fixed plate to guide the cover when the cover is closed, even if the body and the cover are long, the body and the cover are long. Since the and can be guided to the correct position, the body and the cover can be smoothly opened and closed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the spotlight shown in this embodiment comprises a body 1 provided with a lamp 3a for projecting light forward. The body 1 has a substantially rectangular bottom plate 1a that is orthogonal to the top and bottom, a pair of substantially rectangular side plates 1b protruding upward from the side edges of the bottom plate 1a, and a pair of side plates 1b. It is composed of a substantially rectangular front plate 1c protruding upward from the edge and a rear plate, and is formed in a substantially rectangular parallelepiped that opens upward. The front plate 1c is provided with a plurality of substantially elliptical heat dissipation holes 1e for discharging the radiant heat from the lamp 3a.

The cover 2 is formed into a substantially rectangular parallelepiped having an opening on the lower surface. The lower end of the rear plate of the cover 2 is pivotally attached to the upper end of the rear plate of the body 1, and the front part of the body 1 and the cover 2 can be opened and closed. Cover 2 corresponding to front plate 1c of body 1
A light projecting lens 7 is attached to a substantially central portion of the front plate 2a. At the lower end of each side plate 2b of the cover 2 corresponding to each side plate 1b of the body 1, a leg piece 2c inserted into the inside of the side plate 1b of the body 1 is projected.

As shown in FIG. 2, a base plate 5 having a substantially rectangular shape is arranged on the upper surface of the bottom plate 1a, and a pair of fixing plates 5a having a substantially rectangular shape is provided upward at the front and rear ends of the base plate 5 so as to project upward. Has been done. As shown by the alternate long and short dash line in FIG.
Although the height of the rear fixing plate 5a may be substantially equal to that of the rear fixing plate 5a, the height of the rear fixing plate 5a is larger than that of the rear fixing plate 5a in order to prevent light leakage from the heat dissipation hole 1e. I am doing it. Further, by cutting off both corners of the upper end portion of the fixing plate 5a, guide portions 5b are formed which are inclined so as to reduce the mutual distance toward the upper part. A pair of guide rods 6 which are substantially parallel to each other are arranged between the fixed plates 5a along the optical axis of the light projecting lens 7, and both ends of each guide rod 6 are fixed to the fixed plate 5a. There is. A movable table 4 is mounted on both guide bars 6 so as to be movable back and forth. The moving table 4 is moved back and forth by a driving source such as a motor, and the driving source is arranged on the upper surface of the base plate 5 at a portion indicated by a chain line in FIG. Moving table 4
A light source unit 3 in which a light projecting lamp 3a and a reflector 3b are integrated by a light source base 3c is detachably attached to the. The reflector 3b is located behind the lamp 3a,
a and the reflector 3b are arranged on the optical axis of the light projecting lens 7.

As described above, the lamp 3a to the heat dissipation hole 1
The light to e is shielded by the fixed plate 5a on the front side, and the heat dissipation hole 1e is formed in the shielded portion. In this way, since the light from the lamp 3a to the heat dissipation hole 1e is blocked by the front fixing plate 5a, the light of the lamp 3a does not leak from the heat dissipation hole 1e to the outside of the case. Moreover, the fixing plate 5a for fixing the guide rod 6 is used to block the light from the lamp 3a to the heat radiation hole 1e, and it is necessary to newly provide a member for blocking the light from the lamp 3a to the heat radiation hole 1e. Therefore, the cost of parts can be reduced as compared with the case of adding a member that blocks light. Further, since the lamp 3a and the reflector 3b are attached to and integrated with the light source base 3c, and the light source base 3c is detachably attached to the moving base 4, the lamp 3a and the reflector 3b are detachable. In order to do so, the light source base 3c may be attached to and detached from the moving base 4, and at this time, since the lamp 3a and the reflector 3b are attached and detached integrally, the optical axes of the lamp 3a and the reflector 3b may deviate from each other. There is no. When the cover 2 is closed with respect to the body 1, the front plate 2a of the cover 2 is attached to the upper edge of the front plate 1c of the body 1.
Even when the position of the lower edge of the cover 2 is displaced, the cover 2 is guided to the correct position by the guide portion 5a, so that the cover 2 can be accurately closed with respect to the body 1.

By the way, as a spotlight, as shown in FIG.
As shown in FIG. 3, it is considered that the fixed plate 20 is formed in a substantially disc shape so as to be orthogonal to the upper and lower sides, and the light emitting direction of the lamp body 25 that emits the light attached to the fixed plate 20 is controlled. To be
A pair of rod-shaped fixing devices 21 are provided so as to project upward at two positions sandwiching the center of the fixing plate 20. Fixture 2
At the upper end of 1, the tip is folded back to form a substantially L-shaped fixing portion 2
1a is formed. The fixing portion 21a is hung on a hanging baton (not shown) fixed to the ceiling surface and fixed to the ceiling surface. On the upper surface of the fixed portion 21, a drive device 22 including a motor, electric parts such as a potentiometer for adjusting the angular velocity of the motor, and a gear for reducing the rotational speed of the motor
Is provided. A horizontal rotation shaft that is interlocked with the motor is inserted through the center of the fixed plate 20. On the lower surface of the fixed plate 20, a rotary plate 23 having a diameter substantially the same as that of the fixed plate 20 is provided.
The horizontal rotary shaft is fixed to the center of the rotary plate 23. The rotary plate 23 is rotatably held by the fixed plate 20 with respect to a plane perpendicular to the top and bottom. A substantially rectangular arm fixing portion 24a is fixed to the lower surface of the rotary plate 23. A pair of substantially rectangular lamp body holders 24b, which hang down from both ends of the arm fixing portion 24a, are provided so as to project substantially parallel to each other. The arm 24 is composed of the arm fixing portion 24a and the lamp body holding portion 24b. A vertical rotation shaft that rotates along upper and lower surfaces in association with a motor is provided at the lower end of each lamp holding unit 24b, and each vertical rotation shaft is formed in a substantially cylindrical shape.
Are respectively fixed to the respective side surfaces facing each other. The lamp body 25 is rotatably held by the arm 24 along the upper and lower surfaces. A lamp for projecting light is housed inside the lamp body 25, and the light of the lamp is emitted from a circular opening surface formed at the end of the lamp body 25.

By rotating the horizontal rotation axis and the vertical rotation axis by the drive device 22, the direction orthogonal to the lower opening surface of the lamp body 25 can be freely changed, and the light of the lamp can be changed to a desired direction. Can be radiated. The rotation range of the horizontal rotation axis and the vertical rotation axis is controlled by the drive device 22 so that the lamp body 25, the arm 24, and the like do not hit the obstacle.

FIG. 4A is a view of the fixed plate 20 as seen from below, and a pair of levers 26 are provided on the lower surface of the fixed plate 20. One end of the lever 26 projects from the peripheral portion of the fixed plate 20 (see FIG. 4B), and the other end is rotatably attached to the center of the lower surface of the fixed plate 20. A limit switch 26a is fixed to the lower surface of each lever 26 on the concentric circle of the fixed plate 20. Each limit switch 26
A pushing piece 26b is formed toward the center of the fixed plate 20 so as to project from the surfaces of the sides a that are separated from each other. The limit switch 26a is set so that the horizontal rotation shaft stops when the push piece 26b is pushed. Both levers 26
The stopper 28 is provided at a portion of the fixed plate 20 between
(See FIG. 6) is projected downward. On the other hand, a control protrusion 23a (see FIG.
(See) is projected.

When the drive device 22 drives the horizontal rotary shaft, the rotary plate 23 is rotated, and the control projection 23a is rotated as shown by the one-dot chain line in FIG. At this time, when the control protrusion 23a pushes the push piece 26b, the limit switch 26a is turned off, the rotation of the horizontal rotation shaft is stopped, and the rotation of the rotary plate 23 is stopped. At this time, the pushing piece 26b abuts the stopper 28 to prevent the pushing piece 26b from being excessively pushed by the control projection 23a, and the stopper 28 protects the limit switch 26a. If the lever 26 can be installed at a desired position to set the rotation range of the horizontal axis of rotation of the limit switch 26a, and the lever 26 is set at a position where the lamp body 25, the arm 24, etc. do not hit an obstacle. With the setting of the drive device 22 in the rotation range of the horizontal rotation axis and the vertical rotation axis, it is possible to prevent the lamp body 25, the arm 24, etc. from coming into contact with the obstacle. If both levers 26 are moved toward each other, each lever 2
The reference numeral 6 prevents the limit switch 26a from coming into contact with the other limit switch 26a and the lever 26 and preventing the limit switch 26a from being damaged, because the reference numeral 6 cannot come closer to the stopper 28 than a predetermined distance. . Further, since the rotary plate 23 is provided above the lamp body 25, the radiant heat from the lamp body 25 is not directly radiated to the limit switch 26a, and the radiant heat damages or deteriorates the limit switch 26a. Never.

[0018]

According to the invention of claim 1, the cover provided with the light projecting lens and the body provided with the lamp are pivotally attached to each other. Since the lamp will be attached, the lamp can be easily replaced. Further, since the lamp and the reflector are integrated to form a light source unit, and the light source unit is guided by the guide rod in the optical axis direction of the projection lens, the deviation of the optical axis between the lamp and the reflector is caused. It is possible to prevent the deviation of the optical axis between the light projecting lens and the lamp, and it is possible to prevent the deviation of the optical axis between the lamp and other optical systems when the lamp is replaced. There is an advantage. Further, since the heat radiation hole is shielded by the fixing plate provided for fixing the guide rod for guiding the lamp, there is an advantage that light leakage from the heat radiation hole to the outside of the case can be prevented and the fixing plate is used as a guide. By being used for both supporting the rod and shielding the heat radiation holes,
This has an advantage that the cost is reduced as compared with the case where a separate member is provided for shading.

According to the second aspect of the present invention, the fixing plate is provided with the guide portion to guide the cover when the cover is closed. Therefore, even when the body and the cover are long, the body and the cover are not separated from each other. Since they can guide each other to correct positions, there is an advantage that the body and the cover can be smoothly opened and closed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment.

FIG. 2 is a perspective view showing a main part of the embodiment.

FIG. 3 is a perspective view of another spotlight.

FIG. 4A is a bottom view of a fixing plate of another spotlight. (A) is sectional drawing seen from the side surface of the principal part of another spotlight.

FIG. 5 is a top view showing a rotary plate of another spotlight with a fixed plate removed.

FIG. 6 is a top view showing a fixing plate of another spotlight.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Body 1e Heat Dissipation Hole 2 Cover 3 Light Source Unit 3a Lamp 3b Reflector 4 Moving Base 5a Fixing Plate 6 Guide Rod 7 Projection Lens

Claims (2)

[Claims] 1. A case comprising a cover provided with a light projecting lens on a part of a peripheral wall thereof, and a body having the other end pivotally attached so that one end of the cover can be opened and closed, and the body of the light projecting lens. A light source unit that has a lamp mounted on the optical axis and has a reflector integrated with the lamp on the side opposite to the lens for projecting light across the lamp, a movable base that detachably holds the light source unit, and a light projecting unit. Bar that guides the movable table so that it can move in the optical axis direction of the lens, a drive source that moves the movable table along the guide bar, and each end of the guide bar that is fixed to a predetermined portion inside the body so as to face each other. A spotlight, comprising: a pair of fixing plates for fixing the respective parts, wherein a heat dissipation hole is formed through the peripheral wall of the body at a portion where the light from the lamp is blocked by at least one of the fixing plates. 2. A part of a fixing plate of the two fixing plates, which is farther from a pivotally connecting part between the cover and the body, projects toward the cover side, and both ends of the projecting part of the fixing plate are opposed to each other toward the cover. 2. A pair of guide portions are provided to guide the cover while being inclined so as to reduce the distance.
Spotlight as described.