JP2009230984A - Lens, lens mounting substrate, and illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens with which different light distribution characteristics can be obtained easily, to provide a lens mounting substrate to be mounted with the lens, and to provide an illumination device equipped with the lens and the lens mounting substrate. <P>SOLUTION: The lens 1 is equipped with a lens part 11 to demarcate the light distribution of light incident from the light source 3, and a leg body 12 that is extended from the lens part 11 and engaged with the lens mounting substrate 2 to support the lens part 11. The leg body 12 is equipped with a level difference part 13 made to cope with a shape of an engaging part 21 that the lens mounting substrate 2 has. An engaging position of the leg body 12 against the lens mounting substrate 2 is changed, the engaging position of the leg body 12 against the lens mounting substrate 2 is changed in an optical axis Lax direction, and the position of the lens part 11 (lens 1) against the light source 3 is made different in the optical axis Lax direction, so that a different light distribution characteristic Lc can be obtained easily by the same lens 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens including a leg, a lens mounting base on which such a lens is mounted, and a lighting device including the lens and the lens mounting base.

  An illumination device in which a lens and a light source are combined has been proposed (see, for example, Patent Document 1 and Patent Document 2). In such a conventional lighting device, a technique for realizing a desired light distribution characteristic has been proposed.

  For example, Patent Document 1 proposes realizing a desired light distribution characteristic by changing the radius of curvature of a lens with respect to a light source as required. Patent Document 2 proposes that a desired light distribution characteristic is realized by making the radius of curvature of the lens constant and interposing a spacer between the light source and the lens.

  In the technique disclosed in Patent Document 1, since it is necessary to prepare a plurality of lenses having different curvature radii by adjusting the curvature radius in order to obtain different light distribution characteristics, the number of parts is increased and the manufacturing cost is increased. As a result, there was a problem that an inexpensive lighting device with good productivity could not be realized.

Further, in the technique disclosed in Patent Document 2, it is not necessary to prepare a plurality of lenses having different radii of curvature because a spacer is interposed, but since a spacer is required, there is a problem that the number of parts increases. There is a problem that the remaining spacers need to be aligned.
No. 7-44029 JP 2007-258114 A

  The present invention has been made in view of such a situation, and is a lens including a leg, and the leg with respect to the lens mounting substrate is provided by providing the leg with a stepped portion that engages with the lens mounting substrate. It is an object of the present invention to provide a lens that can easily obtain different light distribution characteristics by changing the engagement position of the lens in the optical axis direction to vary the position of the lens with respect to the lens mounting substrate in the optical axis direction.

  The present invention also provides a lens mounting base on which a lens having a leg formed with a stepped portion is mounted, and is provided with a plurality of types of engaging portions corresponding to the stepped portion. It is another object of the present invention to provide a lens mounting base material capable of realizing different light distribution characteristics with the same lens by changing the engagement position of the leg of the lens engaged with the mounting base material in the optical axis direction. Objective.

  In addition, the present invention is an illumination device, and includes the lens according to the present invention and a lens mounting base material, whereby different positions of the lens with respect to the lens mounting base material are made different in the optical axis direction to easily provide different light distribution characteristics. Another object is to provide an inexpensive lighting device that can be realized with high accuracy.

  The lens according to the present invention is a lens that includes a lens portion that defines a light distribution of light incident from a light source, and a leg that extends from the lens portion and engages with a lens mounting substrate to support the lens portion. And the said leg is provided with the level | step-difference part matched with the shape of the engaging part which a lens mounting base material has, It is characterized by the above-mentioned.

  With this configuration, it is possible to change the engagement position of the leg with respect to the lens mounting substrate, and change the engagement position of the leg with respect to the lens mounting substrate in the optical axis direction so that the position of the lens portion with respect to the light source can be changed. Since it can be varied in the axial direction, different light distribution characteristics can be easily obtained with the same lens.

  The lens according to the present invention is characterized in that a plurality of the lens portions are provided.

  With this configuration, it is possible to obtain a lens capable of expanding a light distribution range and configuring a large illumination device.

  A lens mounting base material according to the present invention is a lens mounting base material on which a lens having a lens part that defines a light distribution of light incident from a light source and a leg that extends from the lens part and supports the lens part is mounted. And it is provided with the engaging part with which the said leg is engaged, This engaging part is provided with the multiple types of shape corresponding to the level | step-difference part which the said leg has.

  With this configuration, the engagement position of the lens leg engaged with the lens mounting base material can be changed in the optical axis direction, and different light distribution characteristics can be given to the same lens.

  An illuminating device according to the present invention is an illuminating device including a lens mounting substrate on which a light source and a lens arranged to face the light source are mounted, and the lens is the lens according to the present invention, The lens mounting substrate is a lens mounting substrate according to the present invention.

  With this configuration, the position of the lens portion relative to the light source can be changed in the optical axis direction by changing the engagement position of the lens leg with respect to the lens mounting base material, so that different light distribution characteristics can be easily and highly accurate. Therefore, an inexpensive lighting device can be realized.

  According to the lens of the present invention, the leg portion includes a lens portion that defines the light distribution of light incident from the light source, and a leg body that extends from the lens portion and engages with the lens mounting base material to support the lens portion. Since the body includes a step portion corresponding to the shape of the engaging portion of the lens mounting base material, the engaging position of the leg body with respect to the lens mounting base material is changed, and the leg body with respect to the lens mounting base material is changed. Since the position of the lens part (lens) with respect to the light source can be changed in the optical axis direction by changing the engagement position of the lens in the optical axis direction, different light distribution characteristics can be easily obtained with the same lens. There is an effect.

  Further, according to the lens mounting base material of the present invention, a lens is mounted that includes a lens part that demarcates the light distribution of light incident from the light source, and a leg that extends from the lens part and supports the lens part. Since the engaging portion has a plurality of types of shapes corresponding to the step portions of the leg, the engagement of the lens leg engaged with the lens mounting substrate is provided. The combined position can be changed in the direction of the optical axis, and there is an effect that different light distribution characteristics can be given to the same lens.

  Moreover, according to the illuminating device according to the present invention, the illuminating device includes a lens mounting substrate on which a light source and a lens arranged to face the light source are mounted, and the lens is a lens according to the present invention. Since the lens mounting base material is the lens mounting base material according to the present invention, the position of the lens portion (lens) relative to the light source is changed to the optical axis by changing the engagement position of the lens leg with respect to the lens mounting base material. Since it is possible to vary the direction, it is possible to provide an inexpensive lighting device that can easily and accurately realize different light distribution characteristics.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
Based on FIG. 1 and FIG. 2, a lens, a lens mounting substrate, and a lighting device according to the present embodiment will be described.

  1A and 1B are explanatory diagrams for explaining a lens according to Embodiment 1 of the present invention, in which FIG. 1A is a plan view of a side from which light is emitted, FIG. 1B is a bottom view, and FIG. It is the side view seen transparently from the arrow C direction of A).

  The lens 1 according to the present embodiment is related to a lens portion 11 that defines the light distribution of light incident from a light source 3 (see FIG. 2), and a lens mounting base material 2 (see FIG. 2) that extends from the lens portion 11. The lens 1 includes a leg 12 that supports the lens unit 11 together. In addition, the light source 3 can be comprised, for example with a light emitting diode (LED: Light Emitting Diode).

  Further, the leg body 12 includes a stepped portion 13 corresponding to the shape of the engaging portion 21 (see FIG. 2) of the lens mounting base material 2.

  Therefore, the engaging position of the leg 12 with respect to the lens mounting base 2 can be changed, and the engaging position of the leg 12 with respect to the lens mounting base 2 can be changed in the direction of the optical axis Lax (see FIG. 2). Since the position of the lens unit 11 (lens 1) with respect to the light source 3 can be varied in the optical axis Lax direction, different light distribution characteristics Lc (see FIG. 2) can be easily obtained with the same lens 1.

  That is, an additional member such as a spacer required in the prior art is not required, and the number of parts can be reduced to facilitate assembly, stabilization, and cost reduction.

  The lens 1 is formed of, for example, a synthetic resin, and the lens portion 11 and the leg body 12 are integrally formed. Therefore, the desired shape of the lens part 11 and the leg body 12 can be easily formed.

  Although the shape of the lens 1 is shown as a collimator lens in the drawing, any shape can be applied, and for example, a convex lens, a concave lens, or the like can be used.

  The leg body 12 has, for example, a cylindrical shape, and a stepped portion 13 is formed by increasing the diameter of the base portion (on the lens portion 11 side) and decreasing the diameter of the tip portion. The formation of the stepped portion 13 can be realized in various other forms.

  For example, in the case of a prismatic shape instead of a cylindrical shape, the stepped portion 13 can be formed by combining the sizes of the sides with large and small sizes. In addition, the stepped portion 13 can be formed not only by the combination of the same type of shape but also by, for example, a cylinder, a quadrangular prism, and a triangular prism in order from the root portion. Other polygons, ellipses, etc. can be applied.

  It is desirable from the viewpoint of stability that three or more leg bodies 12 are arranged with respect to the lens 1, but if at least one leg body 12 is provided, positioning in the optical axis Lax direction is possible. Further, when the number of leg bodies 12 is three or more, it is desirable that the leg bodies 12 be arranged at the vertex positions of the regular polygon. Positioning the leg body 12 with respect to the engaging portion 21 can be facilitated by arranging it in correspondence with the apex of the regular polygon.

  For example, when three leg bodies 12 are arranged, the lens body 1 is fixed to the light source 3 with the position of the lens 1 with respect to the light source 3 being fixed at the center by arranging the leg bodies 12 so as to form the vertices of an equilateral triangle. It is possible to change the position in the optical axis Lax direction with respect to the engaging portion 21 only by rotating around (see FIG. 5).

  FIG. 2 is a perspective side view transparently showing a configuration outline of the illumination device and the lens mounting base material according to Embodiment 1 of the present invention, and FIG. 2A shows a state in which the light source is accommodated in the light source accommodating portion. In this way, the lens is mounted on the lens mounting substrate, and (B) is the case where the lens is mounted on the lens mounting substrate so that the light source is separated from the light source housing.

  The illumination device 4 according to the present embodiment includes a light source 3, a lens 1 disposed so as to face the light source 3, and a lens mounting substrate 2 on which the lens 1 is mounted. Moreover, the lens mounting substrate 2 according to the present embodiment is in a state in which the light source 3 is mounted. The lens 1 is as shown in FIG.

  In addition, the lens mounting substrate 2 according to the present embodiment includes a lens unit 11 that demarcates the light distribution of light incident from the light source 3 and a leg 12 that extends from the lens unit 11 and supports the lens unit 11. 1 is installed. The lens mounting substrate 2 includes an engaging portion 21 with which the leg body 12 is engaged, and the engaging portion 21 has a plurality of types of shapes corresponding to the step portions 13 of the leg body 12.

  Therefore, the engagement position of the lens leg 12 engaged with the lens mounting base 2 can be changed in the optical axis Lax direction, and the same lens can have different light distribution characteristics Lc. it can.

  For example, in the case of FIG. 2A, the stepped portion 13 of the leg 12 is engaged with the first engaging portion 21f of the lens mounting base material 2, and the light source 3 is accommodated in the light source accommodating portion 11s. is there. In the case of FIG. 2B, the stepped portion 13 of the leg 12 is engaged with the second engaging portion 21s of the lens mounting base material 2, and the light source 3 is separated from the light source housing portion 11s. is there. That is, the engaging part 21 has a plurality of types of shapes, that is, a first engaging part 21f and a second engaging part 21s.

  The first engagement portion 21f has a shape that engages the step portion 13 in the middle of the thickness direction of the lens mounting substrate 2 (for example, a circular hole having a two-step diameter corresponding to the step portion 13). Further, the second engaging portion 21 s has a shape (for example, a circular through hole) in which the stepped portion 13 is engaged with the surface of the lens mounting substrate 2. In the case where it is not necessary to distinguish the first engaging portion 21f and the second engaging portion 21s from each other, hereinafter, the engaging portion 21 may be simply referred to.

  In the present embodiment, the leg body 12 has a cylindrical shape as shown in FIG. 1, and therefore, the engaging portion 21 is configured by an opening having a shape corresponding to the cylindrical shape (circular tubular shape) as described above. is there. The shape of the engaging portion 21 is not limited to this, and may be any shape as long as the stepped portion 13 can be engaged.

  Since the step portion 13 can be changed by the engaging portion 21, the distance between the light source 3 and the lens 1 can be changed. Therefore, the light incident on the lens 1 from the light source 3 becomes a light beam Ld distributed in a predetermined direction under the action of the lens unit 11.

  When the distance between the lens 1 and the light source 3 (lens mounting substrate 2) is a short distance Ds (for example, FIG. 3A), the light distribution angle is a large light distribution angle θw, and the lens 1 and the light source 3 (lens When the distance to the mounting substrate 2) is a long distance Df (for example, FIG. 3B), the light distribution angle is a small light distribution angle θn.

  Accordingly, it is possible to change the position of the lens portion 11 (lens 1) relative to the light source 3 in the optical axis Lax direction by changing the engagement position of the leg 12 of the lens 1 with respect to the lens mounting base material 2. It is possible to provide an inexpensive lighting device 4 that can easily and accurately realize the light distribution characteristic Lc.

  Further, the light source 3 is in a state of being mounted on the lens mounting substrate 2. Therefore, since the positional relationship between the lens 1 and the light source 3 can be maintained with high accuracy, the light distribution characteristic Lc with high accuracy and high reliability can be realized. The light source 3 can also be arranged separately from the lens mounting substrate 2.

  Further, the first engaging portion 21 f and the second engaging portion 21 s can be appropriately laid out on the plane of the lens mounting substrate 2. A specific layout example will be further described with reference to FIG.

<Embodiment 2>
Based on FIG. 3, the lens, the lens mounting substrate, and the illumination device according to the present embodiment will be described.

  FIG. 3 is a partial perspective side view partially showing a configuration outline of a lens, a lens mounting base material, and a lighting device according to Embodiment 2 of the present invention, and (A) is a distance between a light source and a lens unit. (B) is a case where the lens is mounted on the lens mounting base so that the distance between the light source and the lens portion is long.

  Since the basic configuration of the lens 1, the lens mounting substrate 2, and the illumination device 4 according to the present embodiment is the same as that of the first embodiment, different points will be mainly described.

  The leg body 12 included in the lens 1 according to the present embodiment has two (plural) step portions 13 including a first step portion 13f and a second step portion 13s. Hereinafter, when there is no need to distinguish between the first step portion 13f and the second step portion 13s, the step portion 13 may be simply used. The first step portion 13f is disposed at a position having a large diameter near the root portion of the step portion 13, and the first step portion 13s is disposed at a position having a small diameter near the tip portion of the step portion 13.

  Further, the engaging portion 21 included in the lens mounting substrate 2 is formed so as to correspond to the stepped portion 13. That is, the first engagement portion 21f corresponding to the first step portion 13f and the second engagement portion 21s corresponding to the second step portion 13s are provided. For example, when the engaging portion 21 has a cylindrical shape, the engaging portion 21 can be configured as a circular tube.

  When the first step portion 13f and the first engagement portion 21f are engaged, the distance between the lens 1 and the light source 3 is a short distance Ds (FIG. 3A), and the second step portion 13s. When the second engaging portion 21s is engaged, the distance between the lens 1 and the light source 3 is a longer distance Df than the short distance Ds (FIG. 3B).

  Therefore, when light incident on the lens 1 from the same light source 3 is distributed by the lens unit 11, the illumination device 4 set to the interval Ds can realize the light distribution characteristic Lc with a large light distribution angle θw. This is possible (FIG. 3A). Moreover, in the illuminating device 4 set to the space | interval Df, it becomes possible to implement | achieve the light distribution characteristic Lc of small light distribution angle (theta) n (FIG. 3 (B)).

  In the above description, the number of the step portions 13 is two, but the number can be increased. By increasing the number, the light distribution characteristics can be adjusted more finely.

<Embodiment 3>
The lens according to the present embodiment will be described based on FIG.

  FIG. 4 is a perspective view showing an outline of the configuration of a lens according to Embodiment 3 of the present invention when viewed obliquely from above.

  Since the basic configuration of the lens 1 according to the present embodiment is the same as that of the lens 1 shown in the first and second embodiments, different items will be mainly described.

  In the lens 1 according to the present embodiment, a plurality of lens portions 11 are provided. Therefore, it is possible to obtain a lens capable of expanding the light distribution range and configuring the large illuminating device 4.

  That is, the position of the lens 1 relative to the lens mounting substrate 2 can be adjusted regardless of the arrangement state of the lens portion 11, and the light distribution characteristic Lc corresponding to the step portion 13 can be realized.

  The relationship between the lens mounting substrate 2, the light source 3, and the illumination device 4 with respect to the lens 1 can be the same as in the case of the first and second embodiments, and a description thereof will be omitted.

<Embodiment 4>
Based on FIG. 5, the lens, the lens mounting substrate, and the illumination device according to the present embodiment will be described.

  FIGS. 5A and 5B are explanatory diagrams for explaining the outline of the configuration of the lens mounting base material according to the fourth embodiment of the present invention. FIG. 5A is a plan view, and FIG. 5B is the direction of arrows BB in FIG. (C) is a cross-sectional view in the direction of arrows BB of (A) when the lens is mounted on the lens mounting substrate away from the light source, and (D) is a lens in which the light source is accommodated in the lens. It is sectional drawing in the arrow BB direction of (A) when it mounts | wears with a mounting base material.

  Since the basic configurations of the lens 1, the lens mounting substrate 2, and the illumination device 4 according to the present embodiment are the same as those in the first to third embodiments, different items will be mainly described. The internal structure of the lens 1 is omitted as appropriate.

  In the lens mounting substrate 2 according to the present embodiment, a light source 3 composed of, for example, LEDs is mounted in advance. Further, around the light source 3, two types of engaging portions 21 (first engaging portion 21f and second engaging portion 21s) are arranged and formed corresponding to the arrangement position DP.

  As shown in FIG. 1, the legs 12 of the lens 1 are arranged so as to constitute the vertices of an equilateral triangle. The arrangement position DP is made to correspond to a circle, and the first engagement portion 21f and the second engagement portion 21s are superimposed on the arrangement position DP in correspondence with the apex of the equilateral triangle. Therefore, the positional relationship of the lens 1 with respect to the light source 3 is determined when the lens 1 is engaged with the first engaging portion 21f and when the lens 1 is engaged with the second engaging portion 21s. It is possible to be the same.

  In the case of FIG. 5C, the stepped portion 13 is engaged with the second engaging portion 21s. In the case of FIG. 5D, not the step portion 13 but the base portion of the leg 12 is engaged with the first engagement portion 21f.

  Therefore, in the case of FIG. 5C, it is possible to achieve a narrow light distribution characteristic Lc (see FIGS. 2 and 3) as a small light distribution angle θn, and in the case of FIG. It is possible to obtain a wide light distribution characteristic Lc (see FIGS. 2 and 3) as the light angle θw.

  The step portion 13 is desirably formed in the middle of the leg body 12, but the protruding state of the leg body 12 with respect to the lens portion 11 can be used as the step portion as in the case of the present embodiment. is there. Accordingly, the stepped portion 13 may be disposed at least one place in the middle of the leg 12.

  The shift angle of the second engagement portion 21s with respect to the first engagement portion 21f is set to 60 degrees in consideration of symmetry, but can be set as appropriate, for example, 90 degrees.

<Embodiment 5>
Based on FIGS. 6 and 7, the lens, the lens mounting substrate, and the illumination device according to the present embodiment will be described.

  FIG. 6 is a plan view for explaining a layout example of the engaging portion in the lens mounting base material according to the fifth embodiment of the present invention.

  FIG. 7 is an explanatory diagram showing an example of light distribution characteristics when a lens is mounted on the lens mounting substrate of FIG. 6, and FIG. 7A is a comparison of the lens at the center with respect to the lens mounting substrate to other lenses. (B) shows the light distribution characteristics obtained in the case of (A), and (C) shows a comparison between the lens at the center of the lens mounting substrate and other lenses. The light distribution characteristics obtained when mounted close to each other are shown. In FIG. 7, the legs 12 are omitted for easy viewing of the drawing.

  Since the basic configurations of the lens 1, the lens mounting base 2, and the illumination device 4 according to the present embodiment are the same as those in the first to fourth embodiments, different items will be mainly described.

  The lens mounting base material 2 according to the present embodiment has an engaging portion 21 formed so that, for example, three lenses 1 can be mounted in a straight line (FIG. 6). Since each engaging part 21 is as having demonstrated in Embodiment 4, description is abbreviate | omitted.

  Among the three lenses 1 arranged side by side, the lens 1 arranged at both ends has a short interval Ds with respect to the lens mounting substrate 2, and the lens 1 arranged in the center has a long interval with respect to the lens mounting substrate 2. Df (FIG. 7A). Therefore, the lenses 1 arranged at both ends achieve a wide light distribution characteristic Lc with a large light distribution angle θw, and the lens 1 disposed at the center has a narrow light distribution characteristic Lc with a small light distribution angle θn. Is realized (FIG. 7B).

  In contrast to the case of FIG. 7A, the lens 1 disposed at both ends is set to have a long distance Df with respect to the lens mounting base material 2, and the lens 1 disposed at the center is connected to the lens mounting base material 2. When the interval Ds is a short interval Ds, a light distribution characteristic Lc having a pattern opposite to that in FIG. 7B is obtained (FIG. 7C).

  That is, by adjusting the position of the leg 12 (step 13) with respect to the engaging portion 21, it is possible to very easily change the distance between each lens 1 with respect to the lens mounting substrate 2, and a single characteristic lens. 1 can be used to realize the illumination device 4 having different light distribution characteristics Lc.

It is explanatory drawing explaining the lens which concerns on Embodiment 1 of this invention, (A) is the top view which looked at the side from which light is radiated | emitted, (B) is a bottom view, (C) is the arrow of (A). It is the side view seen through from the C reference direction. It is a see-through | perspective side view which shows transparently the structure outline | summary of the illuminating device which concerns on Embodiment 1 of this invention, and a lens mounting base material, (A) is a lens so that it may be in the state by which the light source was accommodated in the light source accommodating part. This is a case where the lens is mounted on the lens mounting substrate, and (B) is a case where the lens is mounted on the lens mounting substrate so that the light source is separated from the light source housing. It is a partial see-through | perspective side view which shows partially the structure outline | summary of the lens which concerns on Embodiment 2 of this invention, a lens mounting base material, and an illuminating device, (A) is so that the space | interval of a light source and a lens part may become short. (B) is a case where the lens is mounted on the lens mounting base so that the distance between the light source and the lens portion is long. It is a perspective view which shows the structural outline of the lens which concerns on Embodiment 3 of this invention seeing from diagonally upward. It is explanatory drawing explaining the structure outline | summary of the lens mounting base material which concerns on Embodiment 4 of this invention, (A) is a top view, (B) is sectional drawing in the arrow BB direction of (A), (C) is sectional drawing in the arrow BB direction of (A) when attaching a lens to a lens mounting base material away from a light source, (D) accommodates a light source in a lens and makes a lens mounting base material. It is sectional drawing in the arrow BB direction of (A) when mounted | worn. It is a top view explaining the example of a layout of the engaging part in the lens mounting base material which concerns on Embodiment 5 of this invention. It is explanatory drawing which shows the example of the light distribution characteristic at the time of mounting | wearing with the lens mounting base material of FIG. 6, (A) has separated the center lens with respect to the lens mounting base material compared with another lens. (B) shows the light distribution characteristics obtained in the case of (A), and (C) shows that the center lens is mounted closer to the lens mounting substrate than other lenses. The light distribution characteristic obtained in this case is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens 2 Lens mounting base material 3 Light source 4 Illuminating device 11 Lens part 11s Light source accommodating part 12 Leg 13 Step part 13f First step part 13s Second step part 21 Engagement part 21f First engagement part 21s Second engagement Part Df Interval Ds Interval DP Arrangement Position Lax Optical Axis Lc Light Distribution Characteristics Ld Ray θn Light Distribution Angle θw Light Distribution Angle

Claims (4)

A lens comprising: a lens part that defines a light distribution of light incident from a light source; and a leg that extends from the lens part and is engaged with a lens mounting base material to support the lens part,
The said leg is provided with the level | step-difference part made to respond | correspond to the shape of the engaging part which a lens mounting base material has. The lens according to claim 1,
A lens having a plurality of the lens portions. A lens mounting substrate on which a lens including a lens portion that defines a light distribution of light incident from a light source and a leg that extends from the lens portion and supports the lens portion is mounted.
An engagement portion with which the leg is engaged;
The lens mounting base material, wherein the engaging portion has a plurality of types of shapes corresponding to the step portions of the leg. An illumination device including a lens mounting base material on which a light source and a lens arranged to face the light source are mounted,
The lens is the lens according to claim 1 or claim 2,
The lighting device according to claim 3, wherein the lens mounting base material is the lens mounting base material according to claim 3.

Images