JP6753062B2 - Lighting device - Google Patents

Description

The present invention relates to a lighting device.

As a lighting device mounted on a vehicle, a lighting device including a lens and a case body for holding the lens has been proposed (see, for example, Patent Document 1). In this lighting device, the case body is made of resin. Further, in this case, the lighting device is configured as a backlight unit mounted on the head-up display device, and the display light emitted from the lighting device irradiates the windshield through the liquid crystal display panel and the reflection mirror. The driver who drives the vehicle can visually recognize the display image obtained by this irradiation.

Japanese Unexamined Patent Publication No. 2011-191723

However, in the lighting device described in Patent Document 1, since the case body is made of resin, the case is caused by the heat generated by the light source housed inside the case body and the heat of sunlight irradiating the case body. It is relatively easy to deform. Then, as the case is deformed, the position of the lens held in the case may shift.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a lighting device in which misalignment of a lens is suppressed.

In order to achieve the above object, the lighting device according to the present invention
The circuit board on which the light source is placed and
The first lens member through which the light emitted from the light source is transmitted, and
A lens holder located on the outer periphery of the first lens member and
A first leaf spring member fixed to the lens holder and urging the first lens member toward the circuit board.
The plasticity of the first leaf spring member by abutting on the first leaf spring member, which is located in the direction opposite to the direction in which the first leaf spring member is urged and elastically deforms in the elastic region. It is equipped with a first stopper that suppresses deformation .
The lens holder is characterized by having a first side wall to which a pair of first holding pieces provided on the first leaf spring member are fixed .

According to the present invention, it is possible to provide an illumination device in which the misalignment of the lens is suppressed.

It is a perspective view of the lighting apparatus which concerns on embodiment of this invention. It is a top view of the lighting apparatus which concerns on embodiment. FIG. 5 is a cross-sectional arrow view taken along line AA of FIG. 2 of the lighting device according to the embodiment. It is a perspective view of the lens holder which fixed the 1st leaf spring member which concerns on embodiment. FIG. 5 is a cross-sectional arrow view taken along line BB of FIG. 2 of the lighting device according to the embodiment. It is a perspective view of the cover to which the 2nd leaf spring member which concerns on embodiment is fixed. It is an exploded perspective view which shows the method of attaching the cover to the lens holder about the lighting apparatus which concerns on embodiment. It is sectional drawing which shows a part of the lighting apparatus which concerns on embodiment. It is an enlarged view of the part surrounded by the alternate long and short dash line P1 of FIG. 3 of the illuminating device according to the embodiment, (A) is a view showing a normal state, and (B) shows a state in which the lens array is moved upward. It is a figure. It is an enlarged view of the part surrounded by the alternate long and short dash line P2 of FIG. 3 of the illuminating device according to the embodiment, (A) is a diagram showing a normal state, and (B) is a state in which the condenser lens is moved upward. It is a figure which shows. It is a perspective view which shows the state which removed the heat sink of the lighting apparatus which concerns on embodiment. FIG. 5 is a cross-sectional arrow view taken along line CC of FIG. 2 of the lighting device according to the embodiment. It is sectional drawing which shows a part of the lighting apparatus which concerns on a modification.

The lighting device according to the embodiment of the present invention will be described below with reference to the accompanying drawings. This lighting device is configured as, for example, a backlight unit mounted on a head-up display device, and the display light emitted from the lighting device is not shown in detail here, but is a liquid crystal display panel and a liquid crystal display panel. The windshield is irradiated through the reflection mirror, and the driver who drives the vehicle can visually recognize the display image (virtual image) obtained by this irradiation by superimposing it on the landscape. As shown in FIGS. 1 and 2, the lighting device includes a device main body 1 and a heat sink 2 to which the device main body 1 is fixed. The apparatus main body 1 includes a circuit board 11 on which an LED (light source: Light Emitting Diode) is mounted, a lens holder 12 arranged so as to cover the circuit board 11, a condenser lens (second lens member) 16, and a cover. 14 and. The heat sink 2 has a mounting surface 2a to which the lens holder 12 is mounted. The lens holder 12 is fixed to the mounting surface 2a of the heat sink 2 by four screws (fixing members) 21. Hereinafter, the condensing lens 16 side in the direction in which the circuit board 11, the lens holder 12, and the condensing lens 16 overlap will be described as the upper side, and the circuit board 11 side will be described as the lower side.

Further, as shown in FIG. 3, the apparatus main body 1 is further attached to the lens array (first lens member) 24, the diffuser plate 22, the first leaf spring member 25 fixed to the lens holder 12, and the cover 14. It includes a fixed second leaf spring member 23.

The circuit board 11 is in contact with the heat sink 2 via a heat radiating sheet (not shown). The circuit board 11 is composed of a glass epoxy board, a glass composite board, or the like, and a conductive pattern is formed on the mounting surface of the LED. A through hole 111 for positioning the circuit board 11 is provided in a part of the circuit board 11.

The lens array 24 is formed of a translucent resin material and is arranged so as to cover the upper side of the circuit board 11. The lens array 24 is located facing the LED mounted on the circuit board 11 and transmits the light radiated from the LED. The lens array 24 has a lens array main body 240 and support columns 241, 242, and 243. The lens array main body 240 has a flat and thin rectangular box shape with an open lower side, and a plurality of lens portions 240a are formed in a matrix shape on the upper side. The support columns 241 and 242, 243 are formed on the lower surface of the lens array main body 240 in a truncated cone whose diameter becomes smaller toward the lower side. The support columns 241 and 242, 243 support the lens array main body 240 in a state where the lens array main body 240 and the circuit board 11 are separated from each other. Projections 244 and 245 for positioning the lens array 24 are provided on the tip surfaces of the support columns 241 and 243. The protrusions 244 and 245 are each formed in a columnar shape having a tapered tip. The protrusion 244 is fitted into the positioning hole 201 provided in the heat sink 2 in a state of being inserted into the through hole 111 of the circuit board 11. Further, the protrusion 245 is also fitted into the positioning hole 203 provided in the heat sink 2.

The lens holder 12 as a case holds the condensing lens 16 above the condensing lens 16, and holds the lens array 24 inside the lens holder 12 via the first leaf spring member 25. As shown in FIG. 4, the lens holder 12 has a substantially rectangular box shape in a plan view with one surface open, and a rectangular opening (first opening) 120c is provided on the bottom wall 120a. A protrusion (positioning protrusion) 121 for positioning the lens holder 12 with respect to the heat sink 2 is provided near each of the two corners facing each other with the center in the plan view of the lens holder 12 in between. The protrusion 121 is formed in a tapered columnar shape.

The lens holder 12 includes a pair of short side walls 120b facing each other among the four side walls surrounding the bottom wall 120a. Each side wall 120b is provided with a stopper portion (first stopper portion) 122 that regulates plastic deformation of the first leaf spring member 25. The stopper portion 122 is formed integrally with the lens holder 12, is located in the direction opposite to the direction (upward direction) of urging the lens array 24 in the first leaf spring member 25, and abuts on the first leaf spring member 25. Therefore, the plastic deformation of the first leaf spring member 25 that elastically deforms in the elastic region is suppressed. The stopper portion 122 is located at each corner of the bottom wall 120a and is formed in a hollow rectangular columnar shape that is long in the direction orthogonal to the side wall 120b. On the upper surface of the bottom wall 120a, a holding portion 126 for holding the condenser lens 16 and a protrusion 123 for positioning the condenser lens 16 and the diffuser plate 22 are provided. The protrusion 123 has a shape in which a tapered columnar protrusion is provided on the upper surface of the columnar base portion, and is provided on the upper surface of the bottom wall 120a. The holding portion 126 has a rectangular plate-like shape, and is provided on both sides of the protrusions 123 on the upper surface of the bottom wall 120a. Further, four through holes 125 having a rectangular shape in a plan view are provided on the outer peripheral portion of the opening 120c in the bottom wall of the lens holder 12. The leg portion 142 of the cover 14, which will be described later, is inserted into each through hole 125.

The first leaf spring member 25 is fixed to the lens holder 12 and urges the lens array 24 toward the object (circuit board 11) to which the lens array 24 is fixed. The first leaf spring member 25 includes a fixing piece 251 fixed to the side wall 120b of the lens holder 12, a first extending piece 252 extending from two positions of the fixing piece 251 and a tip portion of the first extending piece 252. It has a second extension piece 253, which extends from. The first leaf spring member 25 is formed by punching and bending a single metal plate. As shown in FIG. 9, the fixing piece 251 is formed in a substantially U-shaped cross section, and has holding pieces 251a and 251b that hold the side wall 120b from both sides in the thickness direction thereof. The first extending piece 252 extends from the holding piece 251a arranged along the inner surface of the side wall 120b toward the inside of the lens holder 12 along the lower surface of the stopper portion 122. The first extension piece 252 is inclined so as to move away from the lower surface of the stopper portion 122 toward the tip end side thereof. The second extension piece 253 is inclined so as to approach the lower surface of the stopper portion 122 toward the tip end side thereof. The tip of the first extension piece 252 is in contact with a part of the lens array 24. Further, the stopper portion 122 of the lens holder 12 is arranged in the lens holder 12 so as to face the tip end portion of the second extending piece 253 from the bottom wall 120a side.

The lens holder 12 is located on the outer circumference of the lens array 24 and surrounds the lens array 24 from the outer circumference. The lens holder 12 is supported by the lens array 24 with the tip of the first extension piece 252 of the first leaf spring member 25 hooked on the lens array main body 240 of the lens array 24. Further, the stopper portion 122 is arranged in the lens holder 12 so as to face the tip end portion of the second extension piece 253 from above.

Returning to FIG. 3, the diffuser 22 is arranged between the condenser lens 16 and the lens array 24. The diffusion plate 22 is formed of a translucent resin material and has a plate shape having at least one surface subjected to fine unevenness processing. The diffuser plate 22 is arranged above the lens holder 12 so as to cover the opening 120c of the lens holder 12 shown in FIG. Further, as shown in FIG. 3, a through hole 221 for positioning the diffusion plate 22 is provided on the peripheral portion of the diffusion plate 22. The protrusion 123 of the lens holder 12 is inserted through the through hole 221.

The condenser lens 16 is located above the diffuser plate 22 and is arranged in the cover 14 so as to cover the opening 120c (see FIG. 4) of the lens holder 12 when viewed from the traveling direction of the light emitted from the LED. The lens. The condenser lens 16 is arranged so as to face the lens array 24 via the diffuser plate 22, and collects (transmits) the light transmitted through the lens array 24. As shown in FIG. 5, the condenser lens 16 has a lens portion 161, a flange portion 162 provided on the outer peripheral portion of the lens portion 161 and a flange portion 162 protruding downward from the lower surface of the flange portion 162, and the tip portion thereof is formed on the diffusion plate 22. It has a column portion 163 of a truncated cone that comes into contact with the lens. The strut portion 163 supports the lens portion 161 and the flange portion 162 in a state where the lens portion 161 and the diffuser plate 22 are separated from each other. Further, as shown in FIG. 3, the flange portion 162 is provided with a through hole 164 for positioning the condenser lens 16. The protrusion 123 of the lens holder 12 is inserted through the through hole 164.

The cover 14 is located on the outer periphery of the condenser lens 16 and surrounds the condenser lens 16 from the outer circumference of the condenser lens 16. The cover 14 is attached to the lens holder 12 from a direction opposite to the traveling direction of the light emitted from the LED. As shown in FIG. 6, the cover 14 includes a thin box-shaped cover main body 140 having an open side, and four leg portions 142 extending from each of the four corners of the cover main body 140. The cover body 140 includes a pair of long side walls 140b facing each other among the four side walls surrounding the bottom wall 140a. The cover body 140 is provided with a rectangular opening 140c in a plan view on the bottom wall 140a, and is arranged so as to cover the flange portion 162 of the condenser lens 16 from above the condenser lens 16. The lens portion 161 of the condenser lens 16 is exposed to the outside through the opening 140c of the cover 14. A hook portion 143 that engages with the outer peripheral portion of the through hole 125 when the leg portion 142 is inserted into the through hole 125 of the lens holder 12 is provided at the tip end portion of each leg portion 142.

As shown by the broken line arrow in FIG. 7, the cover 14 as a case is attached to the lens holder 12 so that the four legs 142 are inserted into the four through holes 125 provided in the lens holder 12. At this time, as shown in FIG. 8, the hook portion 143 of each leg portion 142 engages with the outer peripheral portion of the through hole 125 of the bottom wall 120a of the lens holder 12, and the cover 14 is fixed to the lens holder 12. ..

As described above, the cover 14 has the leg portion 142 provided with the hook portion 143, and each leg portion 142 is fixed to the lens holder 12 only by being inserted into the through hole 125 of the lens holder 12. Therefore, since an adhesive or other fixing member for fixing the cover 14 to the lens holder 12 is not required, the number of parts of the apparatus main body 1 can be reduced.

Further, as shown in FIG. 5, a protective rib 141 for projecting upward and protecting the condenser lens 16 is provided on the peripheral edge of the opening 140c in the cover main body 140. The height of the protective rib 141 is set to be higher than the upper end of the condenser lens 16 by the height W1.

By providing the protective rib 141 on the cover body 140 in this way, for example, when another member comes into contact with the device body 1 from diagonally above the device body 1, the other member and the condenser lens 16 are brought into contact with each other. Contact is less likely to occur and damage to the condenser lens 16 is suppressed.

The second leaf spring member 23 urges the condenser lens 16 toward the object (lens holder 12) to which the condenser lens 16 is fixed. As shown in FIG. 6, the second leaf spring member 23 includes a fixing piece 231 fixed to the side wall 140b of the cover main body 140, a third extending piece 232 extending in a direction away from the fixing piece 231 and a second. It has a fourth extension piece 233 extending from the tip of the three extension pieces 232. The second leaf spring member 23 is formed by punching and bending one metal plate in the same manner as the first leaf spring member 25. The fixed piece 231 is formed in a substantially U-shaped cross section, and extends from the holding pieces 231a and 231b that hold the side wall 140b from both sides in the thickness direction and the holding piece 231a arranged along the inner surface of the side wall 140b. It has a main piece 231c arranged along the inner surface of the protruding bottom wall 140a. The third extension piece 232 extends in a direction away from the main piece 231c so as to move away from the inner surface of the bottom wall 140a toward the tip end side thereof. The fourth extension piece 233 is inclined so as to approach the inner surface of the bottom wall 140a toward the tip end side thereof. Further, the tip end portion of the third extension piece 232 is in contact with the flange portion 162 of the condenser lens 16. The bottom wall 140a of the cover 14 is integrally formed with the cover 14 and is located in the direction opposite to the direction (upward) of urging the condenser lens 16 in the second leaf spring member 23, and the second leaf spring member 23. It functions as a stopper portion (second stopper portion) that suppresses plastic deformation of the second leaf spring member 23 that elastically deforms in the elastic region when it comes into contact with the 23.

Then, the cover 14 urges the flange portion 162 of the condenser lens 16 toward the lens holder 12 via the tip portion of the third extension piece 232 of the second leaf spring member 23.

Next, the operation when an external force is applied to the device main body 1 according to the present embodiment will be described. When no external force is applied to the lens holder 12, the tip of the second extension piece 253 of the first leaf spring member 25 is separated from the stopper 122, as shown in FIG. 9A. Then, as shown by the arrow AR1 in FIG. 9B, when the tip of the second extension piece 253 of the first leaf spring member 25 is displaced upward by moving the lens array 24 upward, the first plate The spring member 25 is elastically deformed so that the angle θ1 formed by the holding piece 251a of the fixing piece 251 and the first extending piece 252 is widened. Then, the tip portion of the second extension piece 253 comes into contact with the stopper portion 122 in the elastic region, so that the plastic deformation of the first leaf spring member 25 is regulated.

Here, the distance between the upper surface of the lens array main body 240 of the lens array 24 and the lower surface of the stopper portion 122 when the tip end portion of the second extension piece 253 comes into contact with the stopper portion 122 is L1, and the second extension piece The length of 253 is L2, and the angle formed by the first extension piece 252 and the second extension piece 253 is θ2. Further, the angle corresponding to the elastic limit with respect to the angle θ1 formed by the holding piece 251a and the first extending piece 252 is defined as θ1th. In this case, the relational expression of the following expression (1) is established.
θ1 = θ2-θ3 = θ2-arccos (L1 / L2) <θ1th ... Equation (1)
That is, the angle θ2 formed by the length L2 of the second extension piece 253, the first extension piece 252, and the second extension piece 253 is based on the relational expression of the equation (1) according to the distance L1. Set. For example, assume that the distance L1 is set to 10 mm and the angle θ1th is 80 °. In this case, if the angle θ2 is 120 °, the length L2 of the second extension piece 253 may be set longer than 13 mm.

Further, in a state where no external force is applied to the cover 14, the tip of the fourth extension piece 233 of the second leaf spring member 23 is separated from the bottom wall 140a of the cover 14, as shown in FIG. 10 (A). It is in a state. Then, as shown by the arrow AR2 in FIG. 10B, when the condenser lens 16 moves upward, the angle θ11 formed by the main piece 231c and the third extension piece 232 of the second leaf spring member 23 expands. Elastically deforms like this. Then, when the tip end portion of the fourth extension piece 233 comes into contact with the bottom wall 140a, the deformation of the second leaf spring member 23 is restricted.

Here, the distance between the upper surface of the flange portion 162 of the condenser lens 16 and the lower surface of the bottom wall 140a when the tip end portion of the fourth extension piece 233 abuts on the bottom wall 140a is L11, and the fourth extension The length of the piece 233 is L12, and the angle formed by the third extension piece 232 and the fourth extension piece 233 is θ12. Further, the elastic limit with respect to the angle θ11 formed by the main piece 231c and the third extension piece 232 is set to θ11th. In this case, the relational expression of the following equation (2) is established.
θ11 = θ12−θ13 + 90 °
= Θ12-arccos (L11 / L12) + 90 ° <θ11th ... Equation (2)
That is, the length L12 of the fourth extension piece 233 and the angle θ12 formed by the third extension piece 232 and the fourth extension piece 233 are based on the relational expression of the equation (2) according to the distance L11. Set. For example, assume that the distance L11 is set to 10 mm and the angle θ11th is 170 °. In this case, when the angle θ12 is set to 120 °, the length L12 of the fourth extension piece 233 may be set longer than 13 mm.

As described above, in the apparatus main body 1 according to the present embodiment, the first leaf spring member 25 urges the lens array 24 toward the circuit board 11, and the stopper portion 122 is the first leaf spring member. By abutting on the 25, the plastic deformation of the first leaf spring member 25 is suppressed. As a result, since the lens array 24 is relatively firmly fixed to the circuit board 11, misalignment of the lens array 24 can be prevented, and the positioning accuracy of the lens array 24 can be improved. Further, by providing the stopper portion 122, it is possible to suppress the occurrence of a deviation in the positional relationship between the lens array 24 and the condensing lens 16 due to the plastic deformation of the first leaf spring member 25. Further, by suppressing the occurrence of the positional relationship between the lens array 24 and the condenser lens 16 in this way, there is an advantage that uneven brightness of the display image can be prevented.

By the way, as a lighting device mounted on a vehicle, a lens and a lens holder having a groove formed in which a peripheral edge of the lens is fitted are provided, and a spring body is interposed between the inner surface of the groove and the peripheral edge of the lens. It is conceivable that the lighting device reduces the transmission of the impact applied to the backlight to the lens. In this type of luminaire, it is necessary to increase the rigidity to the extent that plastic deformation due to impact is prevented. However, if the rigidity of the spring body is increased, the size of the spring body itself becomes large accordingly. Then, it may be difficult to reduce the size of the entire backlight including the spring body.

On the other hand, in the apparatus main body 1 according to the present embodiment, when the lens array 24 moves upward, the tip end portion of the second extension piece 253 comes into contact with the stopper portion 122, so that the first leaf spring member 25 Plastic deformation of the lens is suppressed. Further, when the condenser lens 16 moves upward, the tip portion of the fourth extension piece 233 comes into contact with the bottom wall 140a, so that the plastic deformation of the second leaf spring member 23 is suppressed. As a result, even if the leaf spring members 23 and 25 have relatively low rigidity, the leaf spring members 23 and 25 can be prevented from being plastically deformed. Since the leaf spring members 23 and 25 can be miniaturized by the amount that the leaf spring members 23 and 25 having relatively low rigidity can be used, the entire device main body 1 can be miniaturized.

Further, in the present embodiment, the first leaf spring member 25 is provided with the second extension piece 253, and the stopper portion 122 is arranged from above so as to face the tip end portion of the second extension piece 253. A structure that suppresses plastic deformation of the leaf spring member 25 is realized. Further, by providing the fourth extension piece 233 on the second leaf spring member 23, a structure for suppressing the plastic deformation of the second leaf spring member 23 is realized. As described above, since the leaf spring members 23 and 25 are regulated from excessive deformation with a relatively simple structure, there is an advantage that the structure of the device main body 1 can be simplified and the assembly work of the device main body 1 can be facilitated. is there.

Further, in the device main body 1 according to the present embodiment, as shown in FIG. 11, the lens holder 12 has a protrusion 121. On the other hand, as shown in FIG. 12, the heat sink 2 has a hole (positioning hole) 204 that defines the position of the lens holder 12 on the mounting surface 2a. Then, the lens holder 12 can be positioned by placing the lens holder 12 on the mounting surface 2a of the heat sink 2 so that the tip end portion of the protrusion 121 is fitted into the hole 204. The length L31 of the portion fitted into the hole 204 of the protrusion 121 does not separate from the hole 204 when the lens holder 12 is tilted by a predetermined angle within a range of a preset angle with respect to the mounting surface 2a. It is set to the length. For example, the distance between the screw 21 and the protrusion 121, which is the farther from the protrusion 121 of the two screws 21, is L41, and the preset angle range is 0 to θ41th [rad]. In this case, the length L31 is set so that the relational expression of the following equation (3) holds.
L41 × tan θ41th <L31 ... Equation (3)
For example, assume that the distance L41 is set to 100 mm and the angle θ11th that defines the upper limit of the preset angle range is 5 °. In this case, the length L31 of the portion fitted into the hole 204 of the protrusion 121 may be set longer than 8.7 mm.

In this case, the operator assembling the lighting device overtightens the screw 21 of the two screws 21 that is farther from the protrusion 121, and the lens holder 12 has a predetermined angle of less than θ41th with respect to the mounting surface 2a. The protrusion 121 does not come out of the hole 204 even if it is tilted. Therefore, the displacement of the lens holder 12 due to the protrusion 121 coming out of the hole 204 is prevented.

In this way, since the operator who assembles the lighting device can suppress the displacement of the lens holder 12 when the lens holder 12 is fixed to the heat sink 2, the assembly work of the lighting device can be facilitated.

[Modification example]
Although the embodiments of the present invention have been described above, the present invention is not limited to the configuration of the above-described embodiments. For example, as shown in FIG. 13, a protrusion 140d is provided at a position facing the tip of the fourth extension piece 233 of the second leaf spring member 23 on the bottom wall 140a of the cover 14. May be good. In this case, when the tip of the fourth extension piece 233 comes into contact with the lower surface of the protrusion 140d, the deformation of the second leaf spring member 23 is restricted.

According to this configuration, the deformable range of the second leaf spring member 23 can be set by appropriately setting the protrusion amount of the protrusion 140d. Therefore, the deformable range of the second leaf spring member 23 can be set to the optimum range according to the size, shape, and material of the second leaf spring member 23.

1: Device body 2: Heat sink, 2a: Mounting surface, 11: Circuit board, 12: Lens holder, 14: Cover, 16: Condensing lens, 21: Screw, 22: Diffusing plate, 23: Second leaf spring member , 25: 1st leaf spring member, 24: lens array, 111,125,164,2211: through hole, 140: cover body, 240: lens array body, 120a, 140a: bottom wall, 120b, 140b: side wall, 120c , 140c: Opening, 121,123,140d, 244,245: Protruding part, 122: Stopper part, 126: Holding part, 141: Protective rib, 142: Leg part, 143: Hook part, 161,240a: Lens part , 162: Flange part, 163,241,242,243: Support part, 201,203,204: Hole, 202: Screw hole, 231,251: Fixed piece, 231a, 231b, 251a, 251b: Holding piece, 231c: Main piece, 232: 3rd extension piece, 233: 4th extension piece, 252: 1st extension piece, 253: 2nd extension piece

Claims (5)

The circuit board on which the light source is placed and
The first lens member through which the light emitted from the light source is transmitted, and
A lens holder located on the outer periphery of the first lens member and
A first leaf spring member fixed to the lens holder and urging the first lens member toward the circuit board.
The plasticity of the first leaf spring member by abutting on the first leaf spring member, which is located in the direction opposite to the direction in which the first leaf spring member is urged and elastically deforms in the elastic region. It is equipped with a first stopper that suppresses deformation .
The lens holder is characterized by having a first side wall to which a pair of first holding pieces provided on the first leaf spring member are fixed .
Lighting equipment. The first lens member through which the light emitted from the light source is transmitted,
A lens holder located on the outer periphery of the first lens member and
The second lens member that collects the light transmitted through the first lens member and
A cover located on the outer periphery of the second lens member and
A second leaf spring member fixed to the cover and urging the second lens member toward the lens holder.
The plasticity of the second leaf spring member by abutting on the second leaf spring member, which is located in the direction opposite to the direction in which the second leaf spring member is urged and elastically deforms in the elastic region. It is equipped with a second stopper that suppresses deformation .
The cover is characterized by having a second side wall to which a pair of second holding pieces provided on the second leaf spring member are fixed .
Lighting equipment. The lens holder has a box shape with one side open, and a first opening is provided on the bottom wall.
The second lens member that collects the light transmitted through the first lens member is arranged so as to cover the first opening.
Wherein the first plate spring member,
A first extending piece extending from the first holding piece toward the inside of the lens holder,
It has a second extension piece extending from the tip end portion of the first extension piece toward the bottom wall.
The tip of the first extension piece of the first leaf spring member comes into contact with a part of the first lens member.
The first stopper portion is arranged in the lens holder so as to face the tip end portion of the second extension piece from the bottom wall side.
The lighting device according to claim 1. The cover has a box shape with one side open, and a second opening is provided in the bottom wall.
The second lens member has a lens portion and a flange portion provided on the outer peripheral portion of the lens portion.
Said second plate spring member,
A third extension piece extending from the second holding piece and
It has a fourth extension piece extending from the tip end portion of the third extension piece in a direction approaching the bottom wall of the cover.
The tip end portion of the third extension piece of the second leaf spring member is in contact with the flange portion.
The lighting device according to claim 2 . Further provided with a heat sink having a mounting surface on which the lens holder is fixed by a plurality of fixing members.
A positioning hole that defines the position of the lens holder is formed on the mounting surface of the heat sink.
The lens holder has a positioning protrusion capable of positioning the lens holder by arranging the lens holder on the mounting surface so that the tip portion is fitted into the positioning hole.
The length of the portion of the positioning protrusion that is fitted into the positioning hole is set to a length that does not separate from the positioning hole when the lens holder is tilted by a predetermined angle with respect to the mounting surface. Characterized by being
The lighting device according to any one of claims 1 to 4.