JP3212842U - Lighting device - Google Patents

Abstract

Provided is an illuminating device capable of changing the light distribution angle of illumination light, suppressing an increase in cost, and preventing damage to components. In a lighting device including a light source and a lens that projects light emitted from the light source, the lens holding means for holding the lens includes a cylindrical member and an inner side of the cylindrical member. The support member 4 and the pressing member 7 are disposed so as to sandwich the lens, and at least two convex portions having a plurality of steps are formed on the inner surface of the cylindrical member. As described above, a plurality of recesses that are engaged with the plurality of steps of the protrusions are formed on the outer periphery of the support fitting. [Selection] Figure 4

Description

  The present invention provides an illumination device that can change the light distribution angle of illumination light.

  Conventionally, lighting devices using LEDs (Light Emitting Diodes) or the like as light sources have been put to practical use. Furthermore, Patent Documents 1 and 2 disclose illumination devices that can change the light distribution angle of illumination light.

  In order to adjust the light distribution angle of illumination light, Patent Document 1 uses a cylindrical main body provided on the light source side and a cylindrical rotating body that holds a lens. A spiral slide hole is formed on the side surface of the main body, and a guide pin that is movable along the slide hole is provided on the cylindrical rotary body. By rotating the rotary body within the main body, The rotating body is formed to be movable in the central axis direction with respect to the main body. Further, the lens is provided with a protrusion, and the protrusion is engaged with a groove provided on the inner surface of the main body. The lens moves along the groove, and the light source, the lens, The distance has been changed.

  Moreover, in patent document 2, the light distribution control part provided with the lens and the cylindrical adjustment part which is provided in the light source side and accommodates this light distribution adjustment part are used. A plurality of grooves having different lengths are formed as guide portions on the inner surface of the cylindrical shape, and convex portions that engage with the grooves are provided around the light distribution control portion, and the convex portions are selectively provided. The distance between the light source and the lens is changed by engaging with the groove.

JP 2012-221769 A Japanese Patent No. 5756924

  In the illuminating device of Patent Document 1 or 2, a large number of movable parts and specially shaped parts are required for light distribution adjustment, and the manufacturing cost of the illuminating device increases. In addition, it is necessary to provide projections, projections, etc. on the lens and the light distribution control unit that holds the lens, which not only increases the cost of the optical components, but also causes the projections to be easily damaged during handling. There is a bug.

  The present invention has been made in view of the above-described conventional circumstances, and it is possible to change the light distribution angle of illumination light, but to increase the cost by not using complicated movable parts. An object of the present invention is to provide an illuminating device that can suppress and prevent breakage of components.

In order to achieve the above object, a lighting device according to the present invention has the following features.
(1) In an illuminating device including a light source and a lens that projects light emitted from the light source, a lens holding unit that holds the lens is disposed inside the cylindrical member, and the cylindrical member; The support member and the pressing member are disposed so as to sandwich the lens, and at least two convex portions having a plurality of steps are formed on the inner surface of the cylindrical member, A plurality of recesses that engage with the plurality of steps of the protrusions are formed on the outer periphery of the support fitting.

(2) In the illumination device according to (1), a groove for holding the pressing member is formed on the inner surface of the cylindrical member.

(3) In the illumination device according to (1) or (2), the light source is an LED light source arranged on a substrate, and the arrangement shape of the light source and the shape of the lens are point-symmetric with respect to the optical axis. It is set so that it may become.

  According to the present invention, in a lighting device including a light source and a lens that projects light emitted from the light source, the lens holding means for holding the lens is disposed inside the cylindrical member and the cylindrical member. And a support fitting and a pressing member arranged so as to sandwich the lens, and at least two convex portions having a plurality of steps are formed on the inner surface of the cylindrical member. In addition, since a plurality of recesses that engage with the plurality of steps of the projections are formed on the outer periphery of the support fitting, the light source and the lens can be simply changed by changing the mounting position of the support fitting with respect to the cylindrical member. Can be easily changed, and an increase in the cost of the lighting device can be suppressed. Moreover, since it is not always necessary to provide the lens with a special shape such as a protrusion as in the prior art, there is no risk of damage to the protrusion or the like.

It is a perspective view of the illuminating device (downlight) 1 which concerns on one Embodiment of this invention. It is a front view of the illuminating device 1 of FIG. It is a side view of the illuminating device 1 of FIG. It is a disassembled perspective view which concerns on the illuminating device 1 of FIG. It is a perspective view of the cylindrical member 3 shown with the disassembled perspective view of the illuminating device of FIG. It is a front view of the cylindrical member 3 of FIG. It is sectional drawing in the dashed-two dotted line AA of the cylindrical member 3 of FIG. It is a perspective view of the support metal fitting 4 shown with the disassembled perspective view of the illuminating device of FIG. It is a front view of the support metal fitting 4 of FIG. FIG. 4 is a cross-sectional view taken along the two-dot chain line AA of the illumination device 1 in FIG. 3, showing a state in which the lens 5 is farthest from the light source 20 (narrow angle light distribution). FIG. 4 is a cross-sectional view taken along the two-dot chain line AA of the illumination device 1 in FIG. 3, and shows a state where the lens 5 is separated from the light source 20 to some extent (medium angle light distribution). FIG. 4 is a cross-sectional view taken along the two-dot chain line AA of the illumination device 1 in FIG. 3 and shows a state in which the lens 5 is closest to the light source 20 (wide-angle light distribution). It is a perspective view of the illuminating device (spotlight) 1 'concerning one Embodiment of this invention. It is a disassembled perspective view which concerns on the illuminating device 1 'of FIG.

The lighting device of the present invention will be described in detail below with reference to FIGS. 1 to 12 and FIGS.
The illuminating device of the present invention holds a lens in an illuminating device including a light source (reference numeral 20 in FIG. 4) and a lens (reference numeral 5 in FIGS. 2 and 4) that projects light emitted from the light source. The lens holding means is a cylindrical member (reference numeral 3 in FIG. 4) and a support fitting (indicated by reference numeral 4 in FIG. 4) which is disposed inside the cylindrical member and is disposed so as to hold the lens. And a pressing member (reference numeral 7 in FIG. 4), and at least two convex portions (reference numeral 30 in FIG. 5) having a plurality of steps are formed on the inner surface of the cylindrical member. A plurality of recesses (reference numerals 41 to 43 in FIG. 8) that engage with the plurality of steps of the protrusion are formed on the outer periphery of the support metal fitting.

  The illuminating device 1 shown to FIG. 1 thru | or 12 has shown the Example of the downlight used by being embedded in a ceiling or a wall surface. Moreover, the illuminating device 1 'shown in FIGS. 13 and 14 is an embodiment of a spotlight that is used with the fixing means 22 attached to a ceiling, a wall surface or the like. Since the characteristic part of the illuminating device of this invention is common, below, it demonstrates focusing on the illuminating device 1 of a downlight.

  As shown in FIG. 4, the illumination device 1 according to the present invention includes an illumination main body 2 that holds a light source 20 and lens holding means that holds a lens 5. As the light source 20, an LED light source can be used. In particular, a chip-on-board (COB) type light source in which a plurality of LEDs are arranged on the surface of the substrate is preferably used. Moreover, as shown in FIG. 4, the shape and arrangement of the LED light source are shown in FIG. 4 in which a circular light source (a plurality of point light sources are arranged in a circle) is arranged in the center portion, or in Patent Document 1 or 2. As described above, various configurations such as a configuration in which the point light sources are arranged so as to be rotationally symmetric, and a configuration in which the point light sources are arranged in a rotationally asymmetric manner can be adopted.

  Depending on the form of the light source, the shape of the lens used and the rotation of the lens relative to the light source are limited. As shown in FIG. 4, when a circular light source is used as the light source 20, the light source itself is point-symmetric with respect to the optical axis, and the lens is also point-symmetric with respect to the optical axis. For this reason, even if a lens rotates with respect to a light source, the light distribution angle of illumination light does not change. However, when a point light source arranged in a rotational symmetry is used, the lens includes a lens portion corresponding to each point light source, and the lens is rotated at a predetermined angle or cannot be rotated. In the case of using a point light source arranged in a rotationally asymmetric manner, the lens includes a lens portion corresponding to each point light source, and the lens cannot be rotated.

  When the lens is rotated every predetermined angle or when rotation is impossible, as shown in Patent Document 1 or 2, a protrusion and a groove are formed in each of the lens and the cylindrical member that holds the lens. The lenses can be positioned by engaging each other. In addition, since such a projection part may be damaged, it is limited when using the point light source arrange | positioned as rotation light symmetry or rotation asymmetric as a light source.

  A power supply circuit (not shown) for driving the LED light source is disposed inside the illumination body 2. In addition, heat radiating fins 21 are provided around the illumination main body 2 so as to effectively release the heat accumulated in the illumination main body 2.

  In the case of the spotlight shown in FIGS. 13 and 14, a fixing means 22 for fixing the lighting device to a ceiling, a wall surface or the like is attached to the lighting body 2 '. The illumination body 2 'and the fixing means 22 are connected by an arm that can rotate the illumination body 2' in, for example, two axial directions.

  The lens holding means for holding the lens will be described. The lens holding means includes a cylindrical member 3 that houses the lens 5, and a support fitting 4 and a pressing member 7 for arranging and fixing the lens 5 inside the cylindrical member. If necessary, a ring-shaped member 6 as shown in FIG. 4 can be provided between the lens 5 and the pressing member 7. The member 6 can be used as a member for simultaneously holding the filter and the lens. Although not shown in FIG. 4, an elastic member such as an O-ring can be disposed between the support fitting 4 and the lens 5. Further, the lens holding means is joined and fixed to the illumination main body 2 by known engaging means such as screws or fixing means.

  The lens used in the illumination device may be a single lens, but in order to reduce the thickness of the lens, it is more preferable to use a Fresnel lens as shown in FIG. Further, when the point light sources are discretely arranged, as shown in Patent Document 1 or 2, a plurality of lens portions corresponding to each point light source are provided, and a lens body in which these are integrally arranged is configured. It is also possible.

  As shown in FIGS. 5 to 7, the cylindrical member 3 has at least two protrusions 30 having a plurality of steps (31 to 33) formed on the inner surface of the cylindrical member. The cylindrical member can be formed with a convex portion by die casting or injection molding using a metal such as aluminum or a resin. Also, grooves (310, 320, 330) for inserting and holding a part of the pressing member 7 described later can be formed in the same manner.

  As shown in FIGS. 8 and 9, the support fitting 4 is provided with a plurality of recesses (41 to 43) that engage with the steps of the protrusion 30. The support metal fitting can be easily produced by punching a metal plate.

  As shown in FIG. 4, the pressing member 7 can process an elastic metal wire to form an elastic member. The pressing member 7 is provided with a portion that is held by a groove (310, etc.) of the cylindrical member and a portion that protrudes inward and directly or indirectly contacts the lens 5. Further, the pressing member 7 is not limited to the shape shown in FIG. 4, and it is also possible to use a string spring-like member in which a metal wire is spirally wound. In the case where a pressing force can be generated in a wide range in the pressing direction as in the case of a helical spring member, only one groove may be formed in the cylindrical member 3. The pressing member 7 can also be configured using a heat-resistant or elastic material such as rubber or silicon resin. In this case, the shape of the pressing member may be any shape as long as it includes a portion fixedly arranged on a part of the cylindrical member and a portion that presses the lens 5 in the direction of the support bracket 4. Is possible.

A method for using the lens holding member will be described. 10 to 12 are cross-sectional views taken along the two-dot chain line AA of the lighting device 1 of FIG.
In order to set the illumination light to a narrow light distribution angle, as shown in FIG. 10, the concave portion 41 (see FIG. 8) of the support bracket 4 is aligned with the convex portion 30 of the cylindrical member 3, and the support bracket is arranged. 4 is held by a step 31 (see FIG. 5) of the convex portion 30. Next, the lens 5 and, if necessary, the ring-shaped elastic member 6 are arranged on the support fitting 4, and the pressing member 7 is fitted into the groove 310 of the cylindrical member 3. Thereby, the lens 5 is disposed and fixed at a position farthest from the light source 20.

  In order to set the illumination light at an intermediate light distribution angle, as shown in FIG. 11, the concave portion 42 (see FIG. 8) of the support metal 4 is aligned with the convex 30 of the cylindrical member 3, and the support metal 4 Is held by the step 32 (see FIG. 5) of the convex portion 30. Next, the lens 5 and, if necessary, the ring-shaped elastic member 6 are arranged on the support fitting 4, and the pressing member 7 is fitted into the groove 320 of the cylindrical member 3. Thereby, the lens 5 is arranged and fixed at an intermediate position from the light source 20.

  Furthermore, in order to set the illumination light to a wide light distribution angle, as shown in FIG. 12, the concave portion 43 (see FIG. 8) of the support fitting 4 is aligned with the convex portion 30 of the cylindrical member 3 and supported. The metal fitting 4 is held by the step 33 (see FIG. 5) of the convex portion 30. Next, the lens 5 and, if necessary, the ring-shaped elastic member 6 are arranged on the support fitting 4, and the pressing member 7 is fitted into the groove 330 of the cylindrical member 3. Thereby, the lens 5 is disposed and fixed at a position closest to the light source 20.

  In the embodiment, the number of steps provided on the convex portion 30 of the cylindrical member 3 is three, but the number of steps is not limited to this. Moreover, the type of the shape of the recessed part of the support metal fitting 4 changes corresponding to the number of steps.

When attaching the support fitting 4 to the cylindrical member 3, in order to clearly indicate which light distribution angle corresponds to which step or which recess, a convex portion is provided on either the cylindrical member 3 or the support fitting 4. It is preferable to attach a mark corresponding to the step or the recess.
For example, a letter “W” corresponds to a concave corresponding to a wide angle (Wide), a letter “M” corresponds to a middle corresponding to a middle (Narrow), and a narrow angle (Narrow). Each light distribution can be easily discriminated by attaching a letter “N” to the recess.

  According to the present invention, it is possible to change the light distribution angle of the illumination light, but to suppress an increase in cost by using no complicated movable parts, and to prevent damage to the parts. An apparatus can be provided.

DESCRIPTION OF SYMBOLS 1, 1 ': Illuminating device 2, 2': Lighting main body 3: Cylindrical member 4: Support metal fitting 5: Lens 6: Ring-shaped member (a lens filter holding member)
7: Pressing member

Claims (3)

In an illumination device comprising a light source and a lens that projects light emitted from the light source,
The lens holding means for holding the lens has a cylindrical member, a support fitting and a pressing member which are arranged inside the cylindrical member and are arranged so as to hold the lens,
At least two or more convex portions having a plurality of steps are formed on the inner surface of the cylindrical member,
A plurality of recesses that are engaged with the plurality of steps of the protrusions are formed on the outer periphery of the support fitting.   2. The lighting device according to claim 1, wherein a groove for holding the pressing member is formed on an inner surface of the cylindrical member.   3. The illumination device according to claim 1, wherein the light source is an LED light source arranged on a substrate, and the arrangement shape of the light source and the shape of the lens are set to be point-symmetric with respect to the optical axis. A lighting device characterized by comprising:

Images