JP7249587B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting fixtures.

Patent Document 1 describes a cylindrical main body, a light source attached to the main body, a cylindrical rotating body for adjusting the lens focal length, a lens held by the rotating body, and a guide for guiding the rotation of the rotating body. A lighting fixture with a pin is disclosed.

Here, the opening of the main body is formed with a hole extending obliquely with respect to the depth direction of the opening, and a guide pin is fitted in the hole. When the rotating body is rotated in the circumferential direction, the guide pin moves relatively along the hole, and the rotating body moves in the depth direction of the main body. This adjusts the distance between the light source and the lens.

JP 2012-221769 A

However, in the invention of Patent Document 1, the guide pins and holes are exposed to the outside of the main body, and the rotating body that moves in the depth direction protrudes from the main body. end up

The present invention has been made in view of the above points, and an object of the present invention is to enable adjustment of light distribution while ensuring good design.

The present invention is directed to a lighting fixture that includes a light source, a lens arranged on the emission side of the light source, and a lens holder that holds the lens, and has taken the following solutions.

That is, the first aspect of the invention includes a light source-side main body portion provided with the light source, and a cylindrical lens-side main body portion accommodating the lens holder, and the lens-side main body portion is rotatable in the circumferential direction. The lens holder is provided with a cam slit extending obliquely to the axial direction, and the light source side main body has a cam pin that engages with the cam slit. A lever portion is provided, and the lens holder is axially movable by changing the relative position of the cam pin in the cam slit as the lens-side body portion rotates in the circumferential direction.

In the first invention, the lens side main body is supported so as to be circumferentially rotatable with respect to the light source side main body. A lens holder is accommodated in the lens-side body portion. When the lens-side main body is rotated in the circumferential direction, the cam pin relatively moves within the cam slit of the lens holder, and the lens holder moves in the axial direction.

By storing the lens holder in the lens-side main body portion in this way, the cam slits and cam pins of the lens holder are not visible to the human eye. Further, since the lens holder is moved in the axial direction inside the lens side main body, the lens holder does not protrude from the lens side main body. Thereby, light distribution can be adjusted, ensuring designability.

In a second aspect based on the first aspect, at least one guide member extending in the axial direction is provided inside the lens-side main body portion, and an outer peripheral portion of the lens holder is provided with a guide member for the guide member. A guide groove is provided which is slidably fitted.

In the second invention, the lens holder is axially slidable along the guide member. This allows the lens holder to move smoothly along the guide member when the lens-side main body is rotated in the circumferential direction.

In a third invention based on the second invention, the guide member comprises a guide plate extending substantially parallel along the axial direction at a position away from the inner peripheral surface of the lens-side main body portion, and a side edge of the guide plate. a side edge plate extending from a portion toward an inner peripheral surface of the lens side body portion, wherein the inner peripheral surface of the lens side body portion is formed to taper toward the light source; The plate is formed so as to taper toward the light source corresponding to the inner peripheral surface of the lens-side body portion.

In the third invention, the inner peripheral surface of the lens-side body portion is tapered toward the light source. As a result, for example, when the lens-side main body is formed by aluminum die casting, the mold that has entered the inner peripheral surface of the lens-side main body can be easily removed along the axial direction.

Further, the side edge plate of the guide member is tapered toward the light source corresponding to the inner peripheral surface of the lens-side body portion. Therefore, when the side edge plate of the guide member is brought into contact with the inner peripheral surface of the lens-side main body, the guide plate of the guide member moves substantially parallel to the inner peripheral surface of the lens-side main body at a position away from the inner peripheral surface of the lens-side main body. will extend to

Thereby, the lens holder can be smoothly moved in the axial direction along the guide member. Further, if a side edge plate is provided on the side edge portion of the guide plate so that the side edge plate is brought into contact with the inner peripheral surface of the lens-side body portion, the rigidity of the guide member can be increased.

In a fourth aspect, in any one of the first to third aspects, a restricting portion provided in the light source side body portion for restricting movement of the lens side body portion in an axial direction; An urging portion that urges the side body portion toward the restricting portion is provided.

In the fourth invention, the biasing portion biases the lens side main body portion toward the restricting portion of the light source side main body portion. As a result, the lens side main body can be prevented from rattling with respect to the light source side main body, and the lens side main body can be rotated smoothly in the circumferential direction.

ADVANTAGE OF THE INVENTION According to this invention, light distribution can be adjusted, ensuring designability.

It is a side view which shows the structure of the lighting fixture which concerns on this embodiment. FIG. 4 is a front cross-sectional view showing the configuration of a lens-side main body; 4 is a cross-sectional plan view showing the configuration of the lens-side body portion; FIG. It is a perspective view which shows the structure of a lens holder. FIG. 4 is a view equivalent to FIG. 3 when the lens is retracted in the axial direction; FIG. 4 is a view equivalent to FIG. 3 when the lens is advanced in the axial direction; FIG. 4 is a side cross-sectional view for explaining the shape of the inner peripheral surface of the lens-side main body; FIG. 4 is a rear view showing the configuration of the lens-side main body; FIG. 4 is a perspective view showing the configuration of an urging member; FIG. 4 is a side cross-sectional view showing a state before the lens-side main body is attached to the light source-side main body; FIG. 4 is a side cross-sectional view showing a state in which the lens side main body is attached to the light source side main body;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the following description of preferred embodiments is essentially merely an example, and is not intended to limit the present invention, its applications, or its uses.

As shown in FIG. 1, the lighting fixture 10 is a spotlight installed on the ceiling surface 1, for example. The lighting fixture 10 includes an installation portion 11 , a lamp main body 15 that emits illumination light, and a connecting arm 12 that connects the installation portion 11 and the lamp main body 15 .

The installation section 11 is composed of a power supply box in which a power supply circuit is housed. The installation portion 11 is attached to an attachment rail 2 provided on the ceiling surface 1 . The mounting rail 2 is provided with a contact portion (not shown). The installation portion 11 is electrically connected to the contact portion when attached to the mounting rail 2 . The installation portion 11 supplies power to the lamp main body 15 .

The connecting arm 12 rotatably supports the lamp main body 15 . Specifically, the connection arm 12 and the lamp main body 15 are fastened by a knob bolt 13 . By loosening the knob bolt 13, the lamp main body 15 can be rotated about the shaft portion of the knob bolt 13, and the attitude of the lamp main body 15 can be changed. Further, by tightening the knob bolt 13, the lamp main body 15 can be maintained in an arbitrary posture. Thereby, the illumination light can be emitted in a predetermined direction.

The lamp body 15 has a lens side body portion 20 and a light source side body portion 30 . The lens side main body portion 20 and the light source side main body portion 30 are formed in a cylindrical shape and arranged so as to line up in a line in the axial direction.

Inside the lens-side body portion 20, a light source 31, a lens 21 arranged on the emission side of the light source 31, and a lens holder 22 for holding the lens 21 are arranged. The lens side body portion 20 is supported by the light source side body portion 30 so as to be rotatable in the circumferential direction.

Although details will be described later, when the lens-side main body 20 is rotated in the circumferential direction, the lens 21 and the lens holder 22 move forward or backward along the guide member 28 (see FIG. 3). Thereby, the focal length of illumination light can be changed.

A base portion 32 is provided at the front end portion of the light source side body portion 30 . A light source 31 is attached to the base portion 32 . The outer peripheral portion of the light source side body portion 30 has a heat radiation fin portion 33 . Heat generated by the light source 31 is dissipated from the heat dissipating fin portion 33 . The light source side body portion 30 is formed by aluminum die casting, for example.

The light source 31 is composed of a light emitting module having an LED (Light Emitting Diode). The light source 31 is configured to emit white light, for example. The light source 31 is, for example, a COB (Chip On Board) type LED module. The light source 31 receives power from the power supply circuit of the installation section 11 and emits illumination light.

As shown in FIGS. 2 and 3, a guide member 28 extending in the axial direction is provided inside the lens-side body portion 20 . Three guide members 28 are provided at intervals in the circumferential direction.

The guide member 28 includes a guide plate 28a extending substantially parallel along the axial direction at a position away from the inner peripheral surface of the lens side body portion 20, and a guide plate 28a extending from the side edge portion of the guide plate 28a to the inner peripheral surface of the lens side body portion 20. It has a side edge plate 28b extending so as to abut on.

As also shown in FIG. 4, the lens holder 22 has a cylindrical holder main body 23 and a cam portion 25 extending along the outer peripheral edge of the holder main body 23 and protruding rearward. The lens 21 is held in the holder main body 23 . A guide groove portion 24 is provided on the outer peripheral portion of the holder main body 23 .

Three guide grooves 24 are provided at intervals in the circumferential direction. The guide groove portion 24 is slidably fitted to the guide member 28 . This allows the lens holder 22 to move axially along the guide member 28 .

A cam slit 26 extending obliquely with respect to the axial direction is formed in the cam portion 25 . The cam slit 26 is inclined so that the right end is located forward of the left end in FIG. A cam pin 35 is engaged with the cam portion 25 . The cam pin 35 is held by the lever portion 36 . The lever portion 36 is attached to the light source side body portion 30 .

As shown in FIG. 3, a rear end portion of the lens-side body portion 20 is provided with a flange portion 20a. The flange portion 20 a protrudes radially inward from the outer peripheral wall of the lens-side body portion 20 . The flange portion 20a is sandwiched between the light source side main body portion 30 and a regulation ring 37 (regulation portion).

The outer peripheral edge of the regulating ring 37 is in contact with the inner peripheral edge of the flange portion 20a. The regulation ring 37 is fastened to the light source side main body 30 with fastening bolts 38 . As a result, the axial movement of the lens-side body portion 20 is restricted by the restricting ring 37 .

Further, the lens-side main body portion 20 is rotatably supported in the circumferential direction by sandwiching the flange portion 20 a between the light-source-side main body portion 30 and the regulation ring 37 . Here, when the lens-side body portion 20 is rotated in the circumferential direction, the relative position of the cam pin 35 within the cam slit 26 of the lens holder 22 changes.

Specifically, as shown in FIG. 5, when the lens-side body portion 20 is rotated leftward, the cam pin 35 relatively moves rightward. Here, the cam slit 26 is slanted forward rightward in FIG. Therefore, when the cam pin 35 relatively moves rightward in the cam slit 26, the cam portion 25 is pulled rearward, and the lens holder 22 moves rearward. Thereby, the illumination light becomes a wide-angle light distribution.

On the other hand, as shown in FIG. 6, when the lens-side body portion 20 is rotated rightward, the cam pin 35 relatively moves leftward. Here, the cam slit 26 is inclined obliquely forward right in FIG. Therefore, when the cam pin 35 relatively moves leftward in the cam slit 26, the cam portion 25 is pushed forward, and the lens holder 22 moves forward. Thereby, illumination light becomes a narrow-angle light distribution.

In the luminaire 10 of this embodiment, the lens holder 22 is housed inside the lens-side body portion 20, so the cam slit 26 and the cam pin 35 of the lens holder 22 are not visible to the human eye. Further, since the lens holder 22 is moved in the axial direction inside the lens side body portion 20, the lens holder 22 does not protrude from the lens side body portion 20. - 特許庁Thereby, light distribution can be adjusted, ensuring designability.

As shown in FIG. 7 , the inner peripheral surface of the lens-side body portion 20 is formed so as to taper toward the light source 31 . Specifically, d1>d2, where d1 is the inner diameter of the front end side of the lens-side body portion 20, and d2 is the inner diameter of the rear end side thereof. A side edge plate 28b of the guide member 28 is formed so as to taper toward the light source 31 corresponding to the inner peripheral surface of the lens-side body portion 20. As shown in FIG.

As a result, for example, when the lens-side body portion 20 is formed by aluminum die casting, the mold that has entered the inner peripheral surface of the lens-side body portion 20 can be easily removed along the axial direction.

As shown in FIG. 8 , the flange portion 20 a of the lens-side body portion 20 is biased toward the regulation ring 37 by the biasing member 40 . Three biasing members 40 are provided at intervals in the circumferential direction.

As also shown in FIG. 9 , the biasing member 40 includes a pair of mounting pieces 41 bent toward the light source side main body 30 and a pair of spring pieces 42 bent toward the lens side main body 20 . have.

As shown in FIGS. 10 and 11 , the biasing member 40 is sandwiched between the lens side body portion 20 and the light source side body portion 30 to bias the lens side body portion 20 toward the regulation ring 37 . It is something to do.

Specifically, as shown in FIG. 10 , the attachment piece 41 of the biasing member 40 is attached to the light source side body portion 30 . The spring piece 42 of the biasing member 40 faces the flange portion 20a of the lens-side body portion 20 .

The restriction ring 37 is arranged so as to face the light source side body portion 30 with the flange portion 20a interposed therebetween. The restriction ring 37 is formed with an insertion hole 37a. A threaded hole 30a is formed in the light source side body portion 30 so as to correspond to the insertion hole 37a.

Then, the outer peripheral edge of the regulating ring 37 is brought into contact with the inner peripheral edge of the flange portion 20a, and the shaft portion of the fastening bolt 38 is inserted through the insertion hole 37a and screwed into the screw hole 30a. Thereby, the regulation ring 37 is fixed to the light source side main body portion 30 .

At this time, as shown in FIG. 11, the spring piece 42 of the biasing member 40 is pressed by the flange portion 20a and elastically deformed. The flange portion 20 a is urged toward the regulation ring 37 by the urging force of the urging member 40 .

As a result, the lens side body portion 20 can be prevented from rattling with respect to the light source side body portion 30, and the lens side body portion 20 can be rotated smoothly in the circumferential direction.

INDUSTRIAL APPLICABILITY As described above, the present invention is extremely useful and has high industrial applicability because it is possible to obtain the highly practical effect of being able to adjust the light distribution while ensuring designability.

REFERENCE SIGNS LIST 10 luminaire 20 lens-side main body 21 lens 22 lens holder 24 guide groove 26 cam slit 28 guide member 28a guide plate 28b side edge plate 30 light source-side main body 31 light source 35 cam pin 36 lever portion 37 regulation ring (regulation portion)
40 biasing member (biasing portion)

Claims (3)

A lighting fixture comprising a light source, a lens arranged on the emission side of the light source, and a lens holder holding the lens,
a light source side main body provided with the light source;
a cylindrical lens-side main body in which the lens holder is accommodated,
the lens-side body portion is supported by the light source-side body portion so as to be rotatable in the circumferential direction;
The lens holder is provided with a cam slit extending obliquely with respect to the axial direction,
The light source side body portion is provided with a lever portion having a cam pin that engages with the cam slit,
The lens holder is axially movable by changing the relative position of the cam pin in the cam slit as the lens-side main body rotates in the circumferential direction ,
At least one guide member extending in the axial direction is provided inside the lens-side main body,
A lighting fixture, wherein a guide groove portion slidably fitted to the guide member is provided on an outer peripheral portion of the lens holder . In claim 1 ,
The guide member includes a guide plate extending substantially in parallel along the axial direction at a position away from the inner peripheral surface of the lens-side main body, and a guide plate extending from the side edge of the guide plate to the inner peripheral surface of the lens-side main body. a side edge plate extending toward the
an inner peripheral surface of the lens-side body portion is formed so as to taper toward the light source;
The lighting fixture, wherein the side edge plate is formed so as to taper toward the light source corresponding to the inner peripheral surface of the lens-side body portion. A lighting fixture comprising a light source, a lens arranged on the emission side of the light source, and a lens holder holding the lens,
a light source side main body provided with the light source;
a cylindrical lens-side body portion in which the lens holder is accommodated;
a restricting portion provided on the light source side body portion for restricting movement of the lens side body portion in an axial direction;
a biasing portion that biases the lens-side body portion toward the restricting portion ;
the lens-side body portion is supported by the light source-side body portion so as to be rotatable in the circumferential direction;
The lens holder is provided with a cam slit extending obliquely with respect to the axial direction,
The light source side body portion is provided with a lever portion having a cam pin that engages with the cam slit,
The lens holder is axially movable by changing the relative position of the cam pin in the cam slit as the lens-side main body rotates in the circumferential direction.

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