JP5417191B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device such as a vehicle room lamp provided with an optical module that can rotate in all directions.

  For example, Patent Document 1 proposes a room lamp installed on the ceiling of a vehicle in which an irradiation direction can be changed by rotating a light source unit (optical module) including a light source and a lens. In such a room lamp, the irradiation direction can be freely changed by supporting the light source unit rotatably about two rotation axes orthogonal to each other.

JP 2009-037992 A JP 2009-083794 A

  However, the above-described conventional room lamp requires a mechanism for rotating the light source unit around two rotation axes orthogonal to each other, so that the number of parts increases and the thickness increases and the overall size increases. There was a problem.

  In addition, since the movable structure of the light source unit is limited by two axes, there is a problem that the number of the sealing waterproof mechanism increases and the structure becomes complicated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminating device that can reduce the number of parts and reduce the thickness, and can simplify the sealed waterproof structure. There is.

In order to achieve the above object, the invention according to claim 1
An optical module comprising a circuit board on which a light source is mounted, and a hemispherical lens having a concentric spherical surface and a joint disposed on both sides of the circuit board;
A housing provided with an opening to rotatably hold the optical module;
In the lighting device, the peripheral edge of the opening of the housing is in contact with the spherical surface of the lens, and the suspension is fixed to the housing and is in contact with the spherical surface of the joint.
An elastic member is provided on the opening of the housing that contacts the spherical surface of the lens and the spherical surface of the lens.

  According to a second aspect of the present invention, in the first aspect of the present invention, the elastic member is provided in a contact area between the peripheral edge of the opening of the housing and the spherical surface of the lens.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a ring-shaped power supply guide is attached around the circuit board, and an arc portion that is in sliding contact with the spherical surface of the lens is provided. A first power supply terminal that contacts the housing is fixed to the housing, the joint and the suspension are made of metal, and a second power supply terminal formed on the suspension is brought into contact with the spherical surface of the joint It is characterized by that.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the elastic member is a waterproof rubber.

  According to the first aspect of the present invention, it is possible to freely change the irradiation direction by rotating the optical module in all directions with respect to the housing, and it is necessary to rotate the optical module about two axes as in the prior art. Therefore, the structure is simplified, the number of parts is reduced, and a large thickness is not required, so that the apparatus can be thinned.

  In addition, since the lens and the joint constituting the optical module are hemispherical with concentric spherical surfaces, the direction of the holding moment of the optical module is always kept constant regardless of the attitude of the optical module. The housing and the optical module can be surely sealed and waterproofed with a simple configuration in which the peripheral edge of the opening of the housing to be held is always in contact with a circle and a waterproof rubber is provided on the peripheral edge of the opening of the housing.

  According to the second aspect of the present invention, since the waterproof rubber is also provided on the spherical surface of the lens, the sealing and waterproofing of the housing and the optical module can be further ensured.

  According to the third aspect of the present invention, the first power supply terminal, the power supply terminal, the joint, and the second power supply terminal are reliably brought into contact with each other regardless of the posture of the optical module. Therefore, no wiring using a wire harness or the like is required, and the power feeding structure can be simplified. Further, since the joint and the suspension are made of metal, the heat generated in the LED can be dissipated from the joint through the suspension to the surroundings, and the temperature rise of the LED can be suppressed to prevent the light emission efficiency from being lowered.

It is a sectional side view which shows the state at the time of direct irradiation of the illuminating device which concerns on this invention. It is a sectional side view which shows the state at the time of diagonal irradiation of the illuminating device which concerns on this invention. It is a top view of the illuminating device which concerns on this invention. It is a top view which removes and shows the suspension of the illuminating device which concerns on this invention. It is a sectional side view of the illuminating device which concerns on the example of a change of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a side sectional view showing a state of the illumination device according to the present invention during direct irradiation, FIG. 2 is a side sectional view showing a state of the illumination device during oblique irradiation, and FIG. 3 is a plan view of the illumination device. 4 is a plan view showing the lighting apparatus with the suspension removed.

  The lighting device 1 according to the first embodiment is a room lamp installed on the ceiling of a vehicle, and the optical module 3 can be rotated in all directions by a housing 2 that is integrally formed of resin in a substantially cylindrical shape. It is configured to hold.

  The optical module 3 includes a disk-like circuit board 5 on which an LED 4 as a light source is mounted, and a hemispherical lens 6 and a joint 7 having a concentric (center point O is at the same position) spherical surface. 5 is arranged on both sides (lower side and upper side) of this. Here, a wiring pattern (not shown) is formed on the circuit board 5, and a metal power supply guide 8 is fixed around the circuit board 5. The lens 6 is made of a transparent resin and is attached to the lower surface of the circuit board 5, and the joint 7 is made of a metal having high conductivity and thermal conductivity and is attached to the center of the upper surface of the circuit board 5. ing.

  A circular opening 2a is formed at the bottom of the housing 2, and a waterproof rubber 9 as an elastic member is attached to the periphery of the opening 2a. The spherical surface of the lens 6 constituting the optical module 3 accommodated in the housing 2 is in contact with the peripheral edge of the opening 2a of the housing 2 via the waterproof rubber 9. The portion protrudes downward from the opening 2 a of the housing 2. Thus, the optical module 3 is held by the housing 2 so as to be rotatable in all directions by the spherical surface of the lens 6 contacting the peripheral edge of the opening 2 a of the housing 2 via the waterproof rubber 9.

  Further, as shown in FIG. 3, block-like engaging portions 2A are integrally formed at equal angular pitches (120 ° pitches) in the circumferential direction at three locations in the circumferential direction of the inner peripheral portion of the housing 2. A total of three cylindrical bosses 2B are integrally formed at an equal angular pitch in the circumferential direction in the middle of the locking portion 2A. Each locking portion 2A is formed with a linear locking groove 2b, and each boss 2B is formed with a screw hole 2c.

  A first metal power supply terminal 10 made of metal is fixed to each locking portion 2 </ b> A formed in the housing 2. Here, each first power supply terminal 10 is bent into a V shape, and one end thereof forms an arc portion 10a that is in sliding contact with the spherical surface of the lens 6 of the optical module 3, and the other end is formed. The locking piece 10b is formed by being bent. And each 1st electric power supply terminal 10 is fixed to the housing 2 by inserting the locking piece 10b in the locking groove 2b formed in each locking part 2A of the housing 2, and locking, The arc portion 10 a of one power supply terminal 10 is in sliding contact with the mirror surface of the lens 6 of the optical module 3, and the arc portion 10 a is in contact with the power supply guide 8.

  A disc-shaped suspension 11 is attached to the upper surface opening of the housing 2. The suspension 11 is made of a metal having high electrical conductivity and thermal conductivity. As shown in FIG. 4, three second power supply terminals 11a are cut at the center of the suspension 11 so as to have an equiangular pitch ( 120 °), and the tip of each second power supply terminal 11a toward the center is in contact with the spherical surface of the joint 7 and presses the entire optical module 3 downward. Accordingly, the optical module 3 is prevented from floating from the housing 2 by the second power supply terminal 11a, and the optical module 3 is accommodated in the housing 2 so as to be rotatable in all directions. Here, as shown in FIG. 4, three circular holes 11b are formed around the suspension 11 at an equiangular pitch in the circumferential direction, and the suspension 11 has screws (not shown) inserted through the circular holes 11b. It is attached to the upper part of the housing 2 by screwing into a screw hole 2c (see FIG. 4) formed in each boss 2B of the housing 2.

  Thus, in the lighting device 1 configured as described above, the first power supply terminal 10 to the power supply guide 8, the circuit board 5, the LED 4, the circuit board 5, the joint 7, and the second power supply terminal 11a. The LED 4 is driven by the current flowing in order to emit light, but when the optical module 3 is held vertically as shown in FIG. 1, the light L from the LED 4 diffuses by passing through the lens 6. Illuminate a circular spot-shaped irradiation area A1 directly below.

  When the optical module 3 is rotated from the state shown in FIG. 1 and tilted with respect to the vertical as shown in FIG. 2, the irradiation direction is changed, and the light L from the LED 4 is diffused by passing through the lens 6. Illuminate the irradiation area A2 that is shifted from just below. The irradiation direction can be arbitrarily changed by freely rotating the optical module 3 in this way, but the hemispherical lens 6 of the optical module 3 and the center point O of the spherical surface of the joint 7 are at the same position. Therefore, the optical module 3 rotates around the center point O, the position of the center point O is unchanged, and the direction of the holding moment of the optical module 3 is always constant regardless of the attitude of the optical module 3. Kept. For this reason, the lens 6 and the peripheral edge of the opening 2a of the housing 2 that holds the lens 6 are always in a circular contact via the waterproof rubber 9, and the waterproof rubber 9 is simply provided on the peripheral edge of the opening 2a of the housing 2. With this configuration, the housing 2 and the optical module 3 are securely sealed and waterproof.

  Further, no matter how the optical module 3 rotates, the arc portion 10a of the first power supply terminal 10 is in sliding contact with the spherical surface of the lens 6, and the arc portion 10a is always in contact with the power supply guide 8. Since the tip of the second power supply terminal 11a is in contact with the spherical surface of the joint 7, power supply to the LED 4 is always stable, wiring using a wire harness or the like becomes unnecessary, and the power supply structure can be simplified. it can.

  As described above, according to the lighting device 1 according to the present embodiment, the optical module 3 can be rotated in all directions with respect to the housing 2 to freely change the irradiation direction. Since it is not necessary to rotate around two axes as in the prior art, the structure of the lighting device 1 is simplified, the number of parts is reduced, and a large thickness is not required, so that the thickness can be reduced.

  Further, since the joint 7 and the suspension 11 are made of a metal having high conductivity and heat conductivity, the heat generated in the LED 4 can be dissipated from the joint 7 to the surroundings through the suspension 11, and light emission is suppressed while suppressing the temperature rise of the LED 4. The effect that the fall of efficiency can be prevented is also acquired.

  In the above embodiment, the waterproof rubber 9 is attached only to the peripheral edge of the opening 2a of the housing 2. However, as shown in FIG. If the waterproof rubber 12 is provided also in the range of contact with the peripheral edge of the opening 2a, the housing 2 and the optical module 3 are more reliably sealed and waterproofed by the waterproof rubbers 9 and 12.

  The present invention is applicable to lighting devices used in interiors and exteriors of automobiles, aircraft, trains, ships, buildings, houses, offices, various facilities, etc., and the lighting devices include seats, ceilings, doors, It can also be installed in places where thickness is restricted, such as in walls or other products.

DESCRIPTION OF SYMBOLS 1 Illumination device 2 Housing 2A Housing locking part 2B Housing boss 2a Housing opening 2b Housing locking groove 2c Housing screw hole 3 Optical module 4 LED (light source)
5 Circuit board 6 Lens 7 Joint 8 Power supply guide 9 Rubber for waterproofing (elastic member)
DESCRIPTION OF SYMBOLS 10 1st power supply terminal 10a Arc part of 1st power supply terminal 10b Locking piece of 1st power supply terminal 11 Suspension 11a 2nd power supply terminal 11b Circular hole of suspension 12 Waterproof rubber A1, A2 Irradiation Area L Light O Lens and joint spherical center point

Claims (4)

An optical module comprising a circuit board on which a light source is mounted, and a hemispherical lens having a concentric spherical surface and a joint disposed on both sides of the circuit board;
A housing provided with an opening to rotatably hold the optical module;
In the lighting device, the peripheral edge of the opening of the housing is in contact with the spherical surface of the lens, and the suspension is fixed to the housing and is in contact with the spherical surface of the joint.
An illuminating device, wherein an elastic member is provided on the opening of the housing that contacts the spherical surface of the lens and the spherical surface of the lens.   The lighting device according to claim 1, wherein the elastic member is provided in a contact range between a peripheral edge of the opening of the housing and the spherical surface of the lens.   A ring-shaped power supply guide is attached around the circuit board, and a first power supply terminal that has an arcuate portion that slides on the spherical surface of the lens and contacts the power supply guide is fixed to the housing. 3. The lighting device according to claim 1, wherein the joint and the suspension are made of metal, and a second power supply terminal formed on the suspension is brought into contact with the spherical surface of the joint. The lighting device according to claim 1, wherein the elastic member is a waterproof rubber.

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