JP7167600B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting devices.

2. Description of the Related Art In recent years, light sources such as lighting devices using LEDs (Light Emitting Diodes) have become popular. A lighting device using an LED has the advantage of generating less heat than a device using a halogen lamp or the like. For this reason, some conventional lighting devices using LEDs are intended to suppress the temperature rise. For example, in the lighting device described in Patent Document 1, the interior of a housing that houses a radiator that dissipates heat generated from a light source and the interior of a power supply box that houses a power supply unit are spatially separated by a connection member. The connection facilitates air flow and suppresses temperature rise.

JP 2016-110934 A

Here, some conventional lighting devices have a variable irradiation angle. A zoom mechanism is provided to change the irradiation angle by changing the . In a lighting device having such a zoom mechanism, if the distance between the lens and the light source can be changed by moving the light source, the zoom mechanism moves the light source to change the irradiation angle. When the light source is moved, the radiator moves together with the light source. On the other hand, the housing that houses the light source and heat sink has ventilation holes that allow the heat radiated from the heat sink to escape from the inside of the housing when the light source emits light. When it is moved, there is a possibility that the position of the ventilation hole of the housing and the position of the heat radiator are largely misaligned.

In other words, in order to prevent the light from the light source from leaking in a direction other than the desired irradiation direction when the light source emits light, the housing does not have a ventilation hole at a position closer to the lens position than the light source position. , should be properly shaded. Therefore, when the zoom mechanism moves the light source in a direction in which the distance to the lens becomes smaller, the heat radiator that moves with the light source moves to a position where the ventilation hole is not formed, and the position of the heat radiator and the ventilation hole is reduced. is likely to deviate significantly. In this case, the heat radiated from the heat radiator is less likely to escape to the outside of the housing, so there is a risk that the temperature inside the housing will easily rise. However, the part on the irradiation direction side of the light source requires light shielding to prevent the light from the light source from irradiating outside from outside the lens. It has become difficult to provide ventilation holes at all locations in the range of motion. For this reason, it has been very difficult to improve the heat dissipation performance while suppressing the occurrence of leakage light, which is light leaking in directions other than the desired irradiation direction when the light source emits light.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device capable of improving heat radiation performance while suppressing leakage light.

A lighting device according to an embodiment includes a light source; a lens; and an extendable light shielding member. The lens is arranged to face the light source and can change the distance from the light source. The expandable light shielding member is arranged between the light source and the lens, covers the optical path between the light source and the lens, and expands and contracts as the distance between the light source and the lens changes.

ADVANTAGE OF THE INVENTION According to this invention, heat dissipation performance can be improved, suppressing a leak light.

1 is a perspective view of a lighting device according to an embodiment; FIG. 2 is a side view of the lighting device shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view of main parts of the lighting device shown in FIG.

A lighting device 1 according to an embodiment described below includes a light source 52 , a lens 60 , and an extendable light shielding member 130 . The lens 60 is arranged to face the light source 52 and can change the distance from the light source 52 . The expandable light shielding member 130 is arranged between the light source 52 and the lens 60, covers the optical path between the light source 52 and the lens 60, and expands and contracts as the distance between the light source 52 and the lens 60 changes. .

Further, the illumination device 1 according to the embodiment described below includes a housing 10 that covers the light source 52, the lens 60, and the expandable light shielding member 130. A vent hole 18 is formed at a position where the light blocking member 130 is arranged.

[Embodiment]
Next, the illumination device 1 according to the embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of a lighting device 1 according to an embodiment. FIG. 2 is a side view of lighting device 1 shown in FIG. FIG. 3 is a cross-sectional view of main parts of the illumination device 1 shown in FIG. In the following description, the direction parallel to the optical axis of the lens 60 is defined as the front-rear direction F, the side on which the lens 60 is arranged in the front-rear direction F is defined as the front side, and the opposite side is defined as the rear side. The side on which the control device 120 is arranged is the lower side in the vertical direction V, and the opposite side is the upper side in the vertical direction V. As shown in FIG. A direction orthogonal to both the front-back direction F and the up-down direction V is defined as a width direction W. As shown in FIG.

The lighting device 1 includes a housing 10, a band door 30 provided in the housing 10, a suspension member 40 provided in the housing 10, a light source unit 50 housed in the housing 10, and A fixed lens 60, a cooling device 70 that is housed in the housing 10 and configured to be able to cool the light source unit 50, and a light source unit 50 and the cooling device 70 that are fixed and arranged in directions approaching and separating from the lens 60. It has a moving device 100 and a control device 120 which are configured to be movable integrally.

The housing 10 has an opening at one end, and a lens 60 is fixed to this one end. Specifically, the housing 10 has a housing body 11 and a lid member 15 detachably attached to the housing body 11 . The housing body 11 constitutes a bottom wall portion 12, a part of the side wall portion 13, and a rear wall portion 14 of the housing 10, and the lid member 15 constitutes a part of the side wall portion 13 of the housing 10. and an upper wall portion 16 .

A lens fixing portion 20 formed so as to be capable of fixing a lens 60 is arranged in the housing body 11 (see FIG. 3). The lens fixing portion 20 is provided at the front end portion of the housing body 11 . Specifically, the lens fixing portion 20 is formed in a cylindrical shape having an inner diameter substantially the same as the outer diameter of the lens 60, and is arranged with its axial direction facing the front-rear direction F. As shown in FIG. A fixing portion 21 to which the lens 60 is fixed is formed at the rear end portion in the axial direction of the lens fixing portion 20 arranged in this manner.

The fixing portion 21 is, for example, a groove portion that arranges the edge portion of the lens 60 inside. The fixed portion 21 is formed in a shape into which the outer peripheral portion of the lens 60 is fitted. The lens 60 is fixed to the fixed portion 21 by fitting the edge portion of the lens 60 to the fixed portion 21 . By being fixed to the lens fixing portion 20 , the lens 60 is arranged at a position closer to the front side in the front-rear direction F inside the housing body 11 .

The lens fixing portion 20 is fixed in the housing body 11 with the front end in the front-rear direction F, that is, the end to which the lens 60 is not fixed, facing the front end opening of the housing body 11 . there is The lens fixing portion 20 is arranged, for example, coaxially with the front end opening of the housing body 11 .

Further, the space between the front edge of the housing body 11 and the lens fixing portion 20 is closed to prevent light from leaking. As this structure, for example, a wall portion is formed to block the space between the front edge of the housing body 11 and the lens fixing portion 20 .

A plurality of communication holes 22 are formed in the lens fixing portion 20 . The communication hole 22 penetrates the peripheral wall portion of the lens fixing portion 20 . The plurality of communication holes 22 are evenly arranged.

The band door 30 is provided at the edge of the front end opening of the housing 10 . The band door 30 is configured to be able to adjust the irradiation range of the irradiation light emitted from the lens 60 .

The suspension member 40 includes a frame member 41 rotatably connected to each of the side walls 13 of the housing 10, a lock device 42 configured to fix the frame member 41 to the housing body 11, and a frame. and a fixing member 43 fixed to the member 41 (see FIGS. 1 and 2).

The frame member 41 is U-shaped, for example. Both ends of the frame member 41 are coupled to the side wall portions 13 so as to be rotatable around a rotation axis parallel to the width direction W of the housing body 11 . The locking device 42 has, for example, a handle 44 . The lock device 42 is configured to be able to fix the frame member 41 to the housing body 11 by rotating the handle 44 . The posture of the frame member 41 is fixed by being fixed to the side wall portion 13 by the lock device 42 . That is, the frame member 41 is fixed to the housing 10 without rotating. The fixing member 43 is detachably attached to a baton suspended from the ceiling of a place of use such as a studio, for example.

The light source unit 50 has a substrate 51 , a light source 52 mounted on the substrate 51 , and a mirror 53 . The substrate 51 is configured to allow the light source 52 to emit light under the control of the control device 120 (see FIG. 3). The light source 52 is a light emitting element such as an LED (Light Emitting Diode). For example, a plurality of light sources 52 are mounted on the substrate 51 .

The mirror 53 is cylindrical and fixed to the substrate 51 . The mirror 53 has the light source 52 arranged inside it. Further, the substrate 51 is provided with a support mechanism 54 that supports the mirror 53 on the substrate 51 .

The support mechanism 54 has an annular member 55 and a fixing member 56 that fixes the annular member 55 to the substrate 51 . The annular member 55 has its inner edge fixed to the front edge of the mirror 53 . Therefore, the annular member 55 is formed in the shape of a flange extending from the front edge of the mirror 53 in the circumferential direction. The fixing member 56 is, for example, a screw member.

The light source unit 50 configured in this manner is fixed to the moving device 100 in such a posture that the axis of the mirror 53 is arranged on the optical axis of the lens 60 .

The lens 60 is fixed to the fixing portion 21 of the lens fixing portion 20 . That is, the lens 60 is fixed to the housing 10 by being fixed to the lens fixing portion 20 . The lens 60 is arranged to face the light source 52 and is formed so that the light emitted by the light source 52 can be emitted to the outside through the front end opening of the housing 10 . Lens 60 is, for example, a Fresnel lens.

Further, the lens 60 is arranged at a position where the optical axis passes through the center of the housing 10 in the width direction, as an example. In other words, the housing 10 and the lens fixing portion 20 are formed so that the optical axis of the lens 60 passes through the center of the housing 10 in the width direction.

The cooling device 70 has a radiator 80 thermally connected to the light source unit 50 and a plurality of heat pipes 90 thermally connected to the radiator 80 .

The radiator 80 has a base plate 81 to which the substrate 51 of the light source unit 50 is fixed, and a plurality of heat dissipation fins 82 provided on the base plate 81 . The base plate 81 and the plurality of heat radiation fins 82 may be formed as separate members and fixed to each other. Alternatively, they may be integrally formed by extrusion molding or the like.

The base plate 81 is formed in a plate shape. The base plate 81 is fixed to the moving device 100 with one main surface facing forward and the other main surface facing rearward. Further, the base plate 81 is arranged at a position where the optical axis of the lens 60 passes through the center in the width direction. A substrate 51 is arranged on the front surface of the base plate 81, and the light source unit 50 is fixed thereon.

The radiation fins 82 are thermally connected to the light source 52 by fixing the light source unit 50 to the base plate 81 and fixing the radiation fins 82 to the base plate 81 .

The plurality of radiating fins 82 have their front ends fixed to the base plate 81 and the remaining portions extending behind the base plate 81 . The radiation fins 82 are formed in, for example, rectangular plate shapes. The plurality of radiating fins 82 are arranged apart from each other in the width direction W. As shown in FIG. Also, all the heat radiation fins 82 are arranged substantially parallel.

The heat pipe 90 is a tubular member with both ends closed, and contains a working fluid therein. The plurality of heat pipes 90 pass through the plurality of radiating fins 82 in the width direction W, and are annularly formed between the base plate 81 side and the rear side of the base plate 81 . The working fluid contained inside the heat pipe 90 is a volatile liquid. The working fluid evaporates due to the heat received from the base plate 81 and radiates heat at the positions of the heat radiation fins 82 behind the base plate 81 .

The moving device 100 supports the cooling device 70 and the light source unit 50 so as to be movable in the front-rear direction F, and can change the distance between the light source 52 and the lens 60 . Specifically, the moving device 100 has a frame body 95 to which the cooling device 70 is fixed, and a moving mechanism 110 configured to move the frame body 95 in the front-rear direction F. As shown in FIG. The radiator 80 is fixed to the frame 95 .

The moving mechanism 110 is formed so as to be able to move the frame 95 in the front-rear direction F within a predetermined range. Thereby, the moving mechanism 110 can move the cooling device 70 and the light source unit 50 having the light source 52 integrally with respect to the housing 10 . The predetermined range is determined, for example, based on the irradiation range required at a predetermined distance from the lens 60 . The irradiation range is determined by the focal position of the lens 60 . The focal position is determined by the position of light source 52 relative to lens 60 . That is, the predetermined range has its front and rear ends determined according to the focal position of the lens 60 .

The moving mechanism 110 has, for example, a ball screw structure as shown in FIG. Specifically, the moving mechanism 110 has a nut member 111 fixed to the frame 95 and a male screw member 112 rotatably supported by the housing 10 .

The nut member 111 is fixed to the lower end of the side wall of the frame 95 in the width direction W. As shown in FIG. The male screw member 112 is rotatably supported by the support portion 113 on the bottom wall portion 12 of the housing 10 in a posture in which the axial direction thereof is parallel to the front-rear direction F. As shown in FIG. The male screw member 112 is screwed onto the nut member 111 . The frame 95 is moved in the front-rear direction F by rotating the male screw member 112 .

The male threaded member 112 is partly formed with a male thread so that the frame body 95 can move within a predetermined range. No male thread is formed at the rear end of the male thread member 112 .

A rear end portion of the male screw member 112 is arranged behind the rear wall portion 14 of the housing 10 . A handle 115 is provided at the rear end. The handle 115 is formed in a shape that can be easily gripped by the operator. Further, the moving mechanism 110 has a stopper that prevents the frame 95 from moving beyond a predetermined range. That is, the stopper prevents the frame body 95 from moving forward or backward beyond a predetermined range.

The moving mechanism 110 configured in this manner fixes the light source unit 50 , the cooling device 70 , and the frame 95 to the above-described positions with respect to the housing 10 . In the present embodiment, the moving mechanism 110 of the moving device 100 fixes the frame 95 to the housing 10 in the width direction W because the moving mechanism 110 has a ball screw structure. As another example, the moving device 100 may have a fixing mechanism for fixing the frame body 95 in the width direction W in addition to the moving mechanism 110 .

The control device 120 is attached to the bottom wall portion 12 of the housing 10 and is configured to be able to control the light source unit 50 . Further, the control device 120 may be configured to notify the surroundings when the temperature of the light source 52 exceeds the heat-resistant temperature. In this case, the board 51 of the light source unit 50 is provided with a sensor for detecting the temperature of the light source 52 . Based on the detection result of this sensor of the control device 120, it is determined whether the temperature of the light source 52 is equal to or higher than the heat-resistant temperature.

For example, the display unit 121 is used as the notification means to the surroundings. The display unit 121 is formed on the side surface of the control device 120 . When the temperature of the light source 52 is equal to or higher than the heat-resistant temperature, the controller 120 turns on the display unit 121 as an example of alarm display.

A stretchable light shielding member 130 is arranged between the light source unit 50 and the lens 60 . The extendable light shielding member 130 is formed so as to be extendable in the front-rear direction F, is arranged between the light source 52 and the lens 60 , and covers the optical path between the light source 52 and the lens 60 . That is, the extendable light shielding member 130 is formed around the optical axis between the light source 52 and the lens 60 . The shape of the extendable light shielding member 130 when viewed in the front-rear direction F may be a circular shape centered around the optical axis between the light source 52 and the lens 60, or a polygonal shape such as a rectangle.

The extendable light shielding member 130 is made of a deformable material such as resin, and is formed in a bellows shape. One end of the extendable light-shielding member 130 in the extension/contraction direction of the bellows is attached to the light source unit 50 side, and the other end in the extension/contraction direction of the bellows is attached to the lens fixing section 20 side.

The end of the stretchable light shielding member 130 on the side attached to the light source unit 50 is attached to the fixing member 57 provided on the front side in the front-rear direction F of the frame 95 . That is, the end of the stretchable light shielding member 130 on the side attached to the light source unit 50 is fixed to the light source unit 50 via the frame 95 . The end portion of the extendable light shielding member 130 on the side attached to the lens fixing portion 20 is attached to the fixing portion 21 of the lens fixing portion 20 from the rear side in the front-rear direction F. That is, the end portion of the extendable light shielding member 130 on the side attached to the lens fixing portion 20 is fixed to the lens 60 via the lens fixing portion 20 .

The telescopic light-shielding member 130 that can be extended and retracted in the front-rear direction F has one end fixed to the light source unit 50 and the other end fixed to the lens 60 in the direction of expansion and contraction. When changed, it is possible to expand and contract in the front-rear direction F as the distance between the light source 52 and the lens 60 changes.

The housing 10 covers the light source 52, the lens 60, and the extendable light shielding member 130 by arranging the lens fixing portion 20 and the light source unit 50 inside. Pores 18 are formed. In this embodiment, the ventilation holes 18 are formed in the upper wall portion 16 (see FIG. 1) and the rear wall portion 14 of the housing 10 (the ventilation holes 18 of the rear wall portion 14 are not shown).

Of these, the ventilation hole 18 formed in the upper wall portion 16 of the housing 10 is formed in a wide range from a position near the front end to a position near the rear end in the front-rear direction F of the top wall portion 16 . For this reason, the ventilation holes 18 formed in the housing 10 are arranged in the front-rear direction F at the positions where the cooling device 70 arranged inside the housing 10 is arranged, the positions where the light source units 50 are arranged, and the positions where the light sources 52 are arranged. It is formed at a position in the irradiation direction where the stretchable light shielding member 130 is arranged.

The illumination device 1 according to the present embodiment is configured as described above, and the operation thereof will be described below. When light is emitted from the illumination device 1 , power supplied from an external power supply is controlled by the control device 120 and supplied to the light source 52 . The light source 52 emits light by the power supplied. When the light source 52 emits light, the light emitted from the light source 52 travels forward in the front-rear direction F. As shown in FIG.

Since the lens 60 is arranged in front of the light source 52 , the light from the light source 52 passes through the lens 60 . At that time, the light passing through the lens 60 is refracted based on the shape of the lens 60 while passing through. Thereby, the light transmitted through the lens 60 is irradiated forward in the front-rear direction F with an arbitrary light distribution set in advance.

The illumination device 1 irradiates the light by the light source 52 emitting light as described above, and when the light source 52 emits light, heat is generated. The heat generated by the light source 52 is transmitted to the radiator 80 thermally connected to the light source unit 50 and radiated by the cooling device 70 including the radiator 80 . The air inside the housing 10 whose temperature has risen due to the heat radiation from the cooling device 70 is discharged to the outside of the housing 10 through the ventilation holes 18 formed in the housing 10 near the radiator 80 . Thereby, the temperature rise of the light source unit 50 can be suppressed.

Also, the light source unit 50 that emits light from the light source 52 can be moved in the front-rear direction F by the moving device 100 . The movement of the light source unit 50 by the moving device 100 is performed by the operator rotating the handle 115 arranged on the rear wall portion 14 of the housing 10 . When the handle 115 is rotated, the male threaded member 112 of the moving mechanism 110 of the moving device 100 rotates with the rotation of the handle 115 , and the nut member 111 moves in the front-rear direction F according to the rotation of the male threaded member 112 . Since the nut member 111 is fixed to the frame 95 , when the nut member 111 moves in the front-rear direction F, the frame 95 also moves in the front-rear direction F. As a result, the cooling device 70 and the light source unit 50 are integrally moved in the front-rear direction F together with the frame 95 , that is, the light source unit 50 is moved in the front-rear direction F.

When the light source unit 50 moves in the front-rear direction F, the distance between the light source 52 and the lens 60 changes, and the incident angle of the light emitted from the light source 52 to the lens 60 changes. As a result, the angle of the light when the light from the light source 52 passes through the lens 60 and is emitted forward changes, and the irradiation angle at the time of irradiation changes. That is, when the light from the light source 52 passes through the lens 60 and is emitted forward, the spread of the light changes, and the irradiation range changes.

Here, when the light source unit 50 is moved in the front-rear direction F by the moving device 100 in order to change the irradiation range, the radiator 80 also moves together with the light source unit 50 . At that time, if the ventilation holes 18 for heat radiation from the radiator 80 formed in the housing 10 are formed in the vicinity of the entire movement range of the radiator 80, the position of the light source unit 50 Depending on the situation, the light from the light source 52 may leak from the ventilation hole 18 . That is, since the light from the light source 52 is irradiated toward a wide range with a large irradiation angle, a portion of the light is directed toward directions other than the lens 60 . Therefore, depending on the position of the light source unit 50 , there is a possibility that part of the light directed in directions other than the lens 60 may leak through the ventilation hole 18 .

In contrast, in this embodiment, the optical path between the light source 52 and the lens 60 is covered with the extendable light shielding member 130 . Therefore, regardless of the position of the light source 52 , the light that tends to spread outside the optical path toward the direction other than the lens 60 can be blocked by the stretchable light blocking member 130 . In addition, since the extendable light shielding member 130 expands and contracts according to the change in the distance between the light source 52 and the lens 60, even when the light source 52 is moved by moving the light source unit 50 in the front-rear direction F, the position of the light source 52 can be changed. Regardless, the light directed from the light source 52 in directions other than the lens 60 can be continuously blocked. Therefore, even when the distance between the light source 52 and the lens 60 is changed, it is possible to effectively suppress the temperature rise without generating leakage light. As a result, it is possible to improve the heat radiation performance while suppressing leakage light.

Further, the ventilation holes 18 formed in the housing 10 are formed in the upper wall portion 16 and the rear wall portion 14 of the housing 10, and the ventilation holes 18 formed in the upper wall portion 16 extend in the front-rear direction F. is formed over a wide range from a position near the front end to a position near the rear end. That is, a part of the ventilation hole 18 formed in the housing 10 is formed at a position where the stretchable light shielding member 130 is arranged in the irradiation direction of the light source 52 . As a result, the vent hole 18 can be formed in the vicinity of the entire movement range of the heat sink 80 more reliably, and the heat radiated from the heat sink 80 can be prevented regardless of the positions of the light source 52 and the heat sink 80. can be emitted outside the housing 10 . In addition, by forming the vent hole 18 at the position where the stretchable light shielding member 130 is arranged in the irradiation direction of the light source 52 , the vent hole 18 is formed in a wider range of the housing 10 . The heat inside the housing 10 at the time of light emission can be released from more ventilation holes 18 . Therefore, the temperature rise of the light source 52 inside the housing 10 can be more reliably suppressed, and the heat dissipation performance can be improved while suppressing leakage light more reliably.

Further, the lens 60 is fixed to the housing 10 via the lens fixing portion 20, and when changing the irradiation angle, the moving device 100 moves the light source 52 with respect to the housing 10, thereby Since the distance between 52 and lens 60 is changed, irradiation efficiency can be ensured when changing the irradiation angle. In other words, if the mechanism for changing the distance between the light source 52 and the lens 60 to change the irradiation angle is to fix the light source 52 to the housing 10 and move the lens 60 with respect to the housing 10, the lens When the distance between 60 and light source 52 is reduced, lens 60 is greatly separated from the opening of housing 10 through which the illumination light passes. In this case, the light from the light source 52 that has passed through the lens 60 is likely to be blocked by the housing 10 at a portion distant from the optical axis, so there is a risk that the irradiation efficiency will be likely to decrease.

On the other hand, when the lens 60 is fixed near the opening of the housing 10 through which the irradiation light passes, the light from the light source 52 transmitted through the lens 60 is less likely to be blocked by the housing 10. The light emitted by 52 can be efficiently irradiated. As a result, it is possible to ensure the irradiation efficiency when changing the irradiation angle, and it is possible to improve the heat radiation performance while ensuring the irradiation efficiency.

[Modification]
In the illumination device 1 according to the above-described embodiment, when changing the distance between the light source 52 and the lens 60, the light source 52 is moved to change the distance between the two. Thus, the distance between light source 52 and lens 60 may be varied. In addition, in the illumination device 1 according to the above-described embodiment, the light source unit 50 is moved by the operator rotating the handle 115 of the moving device 100. and may be moved based on a control signal from the control device 120 . When changing the distance between the light source 52 and the lens 60, any of them may be moved as long as the distance between the light source 52 and the lens 60 can be appropriately changed. Any method is acceptable.

Further, in the lighting device 1 according to the above-described embodiment, among the ventilation holes 18 of the housing 10, the ventilation holes 18 formed at the positions where the extensible light shielding members 130 are arranged in the irradiation direction of the light source 52 are located in the housing 10. , but the ventilation hole 18 may be formed at a position other than this. For example, the ventilation hole 18 formed at the position where the stretchable light shielding member 130 is arranged in the irradiation direction of the light source 52 may be formed in the side wall portion 13 of the housing 10 . By forming the ventilation hole 18 in the portion of the housing 10 positioned around the extensible light shielding member 130, the ventilation hole 18 can be positioned near the radiator 80 at any position in the movement range of the radiator 80. Heat can be radiated from the ventilation holes 18, and the heat can be effectively radiated. As a result, regardless of the positions of the light source 52 and the radiator 80, it is possible to effectively suppress the temperature rise during the light emission of the light source 52, thereby improving the heat dissipation performance.

Further, in the illumination device 1 according to the above-described embodiment, the housing 10 is arranged around the stretchable light shielding member 130 , but the housing 10 does not have to be arranged around the stretchable light shielding member 130 . Since the stretchable light shielding member 130 is arranged between the light source 52 and the lens 60, the light emitted from the light source 52 and traveling in a direction other than the lens 60 can be blocked by the stretchable light shielding member 130. - 特許庁That is, leakage of light from between the light source 52 and the lens 60 can be suppressed by the stretchable light shielding member 130 . Therefore, considering other factors such as strength, if there is no problem even if the housing 10 is not placed around the stretchable light shielding member 130, the housing 10 is placed around the stretchable light shielding member 130. It doesn't have to be. When the housing 10 is not arranged around the extensible light shielding member 130, the heat dissipation from the radiator 80 can be further improved, and the temperature rise can be suppressed more reliably, so the heat dissipation performance can be improved more reliably. can be made

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

1 lighting device 10 housing 18 ventilation hole 20 lens fixing part 30 band door 40 hanging member 50 light source unit 51 substrate 52 light source 60 lens 70 cooling device 80 radiator 100 moving device 110 moving mechanism 115 handle 120 control device 130 telescopic light shielding member

Claims (3)

a light source;
a lens disposed opposite to the light source and capable of changing the distance from the light source;
an expandable light shielding member disposed between the light source and the lens, covering an optical path between the light source and the lens, and expanding and contracting as the distance between the light source and the lens changes;
and
The stretchable light shielding member is
One end side is attached to the light source side and the other end side is attached to the lens side
lighting device. A housing that covers the light source, the lens, and the stretchable light shielding member;
and
2. The lighting device according to claim 1, wherein the housing is formed with a ventilation hole at a position where the stretchable light shielding member is arranged in the irradiation direction of the light source. the lens is fixed to the housing,
The lighting device according to claim 2, wherein the distance between the light source and the lens changes as the light source moves with respect to the housing.

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