초록 ▼

A first LED unit, a first reflector, a second LED unit, a second reflector, and a light source mount which supports the first LED unit and the second LED unit are provided in a light chamber. The first reflector is formed integrally with a projection lens and forwardly reflects direct light outputte

A first LED unit, a first reflector, a second LED unit, a second reflector, and a light source mount which supports the first LED unit and the second LED unit are provided in a light chamber. The first reflector is formed integrally with a projection lens and forwardly reflects direct light outputted from a first LED to the central axis of the lens. The second reflector is formed integrally with the projection lens and forwardly reflects direct light outputted from a second LED. The light source mount has a fixing portion adapted to perform the positioning of the projection lens, the first reflector and the second reflector, which are formed integrally with a connecting member, in the direction of the central axis of the lens. The light source mount also has a positioning projection and positioning recesses, which are adapted to perform the positioning of the projection lens, the first reflector and the second reflector in a direction perpendicular to the central axis.

대표청구항 ▼

What is claimed is: 1. A vehicle headlamp comprising: a projection lens disposed on a central axis of a lens extending in a front-rear direction of a vehicle; an LED unit including: a semiconductor light emitting element disposed in rear of the projection lens, a heat radiating board having a top s

What is claimed is: 1. A vehicle headlamp comprising: a projection lens disposed on a central axis of a lens extending in a front-rear direction of a vehicle; an LED unit including: a semiconductor light emitting element disposed in rear of the projection lens, a heat radiating board having a top surface to which the semiconductor light emitting element is directly fixed, and a contact formed on the heat radiating board to receive electric power causing the semiconductor light emitting element to emit light; a reflector adapted to forwardly reflect direct light emitted from the semiconductor light emitting element to a central axis of the lens; and a light source mount having: a unit support surface that is in direct contact with a bottom surface of the heat radiating board and that supports the LED unit, a unit positioning portion adapted to directly abut against a side surface of the heat radiating board and to position the LED unit, a reference surface adapted to position the projection lens and the reflector in a direction of the central axis of the lens, and a positioning section adapted to position the projection lens and the reflector in a direction perpendicular to the central axis of the lens, wherein the projection lens and the reflector are formed in a single structure, wherein the reflector comprises a first positioning portion disposed at a rearmost part of the reflector, the positioning section of the light source mount comprises a second positioning portion, and the first positioning portion and the second positioning portion are engaged with each other, wherein one of the first and second positioning portions is introduced into the other of the first and second positioning portions, wherein said one of the first and second positioning portions comprises a projection, and the other of the first and second positioning portions comprises a recess which is caved in the direction of the central axis of the lens, and wherein a distal end of the projection abuts the recess. 2. The vehicle headlamp according to claim 1, further comprising: a shade provided between the projection lens and the semiconductor light emitting element, wherein the shade is operable to block off a part of light reflected from the reflector to form a cutoff line in a light distribution pattern based on light passed through the projection lens, and wherein the shade is formed in a single structure with the projection lens and the reflector. 3. The vehicle headlamp according to claim 2, further comprising: an attachment having an electric power feeding portion, wherein the electric power feeding portion is adapted to receive electric power, which causes the semiconductor light emitting element to emit light, from an external power plug and to supply the electric power to the contact, and wherein the attachment is operable to surround and hold the LED unit in a state in which the bottom surface and a part of the side surface of the heat radiating board is exposed, and in which a space above the light emitting element is open. 4. The vehicle headlamp according to claim 1, further comprising: an attachment having an electric power feeding portion, wherein the electric power feeding portion is adapted to receive electric power, which causes the semiconductor light emitting element to emit light, from an external power plug and to supply the electric power to the contact, and wherein the attachment is operable to laterally surround and hold the LED unit in a state in which the bottom surface and a part of the side surface of the heat radiating board is exposed, and in which a space above the light emitting element is open. 5. The vehicle headlamp according to claim 1, further comprising: a lamp body; and a cover which forms a chamber with the lamp body, wherein the projection lens, the LED unit, the reflector, and the light source mount are housed in the chamber. 6. The vehicle headlamp according to claim 1, wherein the projection lens and the reflector are made of resin. 7. The vehicle headlamp according to claim 1, wherein the recess is formed as a cross-sectionally V-shaped groove that extends in a horizontal direction. 8. The vehicle headlamp according to claim 1, further comprising a connecting member formed as a molded part to be integral with the reflector, wherein the projection lens is directly fixed to a front end portion of the connecting member. 9. A vehicle lamp comprising: a projection lens disposed on a central axis of a lens extending in a front-rear direction of a vehicle; a first LED unit including: a first semiconductor light emitting element disposed in rear of the projection lens, a first heat radiating board having a top surface to which the first semiconductor light emitting element is directly fixed, and a first contact formed on the first heat radiating board to receive electric power causing the first semiconductor light emitting element to emit light; a first reflector adapted to forwardly reflect direct light emitted from the first semiconductor light emitting element to a central axis of the lens; a second LED unit including: a second semiconductor light emitting element disposed substantially back to back with the first semiconductor light emitting element, a second heat radiating board having a top surface to which the second semiconductor light emitting element is directly fixed, and a second contact formed on the second heat radiating board to receive electric power causing the second semiconductor light emitting element to emit light; a second reflector adapted to forwardly reflect direct light emitted from the second semiconductor light emitting element; and a light source mount having: first and second unit support surfaces that are in direct contact with bottom surfaces of the first and second heat radiating boards, respectively, and that respectively support the first and second LED units, first and second unit positioning portions which directly abut against side surfaces of the first and second heat radiating boards, respectively, and which position the first and second LED units, a reference surface adapted to position the projection lens and the first and second reflectors in a direction of the central axis of the lens, and a positioning section adapted to position the projection lens and the first and second reflectors in a direction perpendicular to the central axis of the lens, wherein the projection lens, the first reflector, and the second reflector are formed in a single structure, wherein the first reflector comprises a first positioning portion disposed at a rearmost part of the first reflector, the positioning section of the light source mount comprises a second positioning portion, and the first positioning portion and the second positioning portion are engaged with each other, wherein one of the first and second positioning portions is introduced into the other of the first and second positioning portions, wherein said one of the first and second positioning portions comprises a projection shape, and the other of the first and second positioning portions comprises a recess which is caved in the direction of the central axis of the lens, wherein a distal end of the projection of said one of the first and second positioning portions abuts the recess of the other of the first and second positioning portions, wherein the second reflector comprises a third positioning portion disposed at a rearmost part of the second reflector, the positioning section of the light source mount comprises a fourth positioning portion, and the third positioning portion and the fourth positioning portion are engaged with each other, wherein one of the third and fourth positioning portions is introduced into the other of the third and fourth positioning portions, wherein said one of the third and fourth positioning portions comprises a projection, and the other of the third and fourth positioning portions comprises a recess which is caved in the direction of the central axis of the lens, and wherein a distal end of the projection of said one of the third and fourth positioning portions abuts the recess of the other of the third and fourth positioning portions. 10. The vehicle headlamp according to claim 9, further comprising: a shade provided between the projection lens and the first semiconductor light emitting element, wherein the shade is operable to block off a part of light reflected from the first reflector to form a cutoff line in a light distribution pattern based on light passed through the projection lens, and wherein the shade is formed in a single structure with the projection lens, the first reflector, and the second reflector. 11. The vehicle headlamp according to claim 9, further comprising: a first attachment having an first electric power feeding portion adapted to receive electric power, which causes the first semiconductor light emitting element to emit light, from an external power plug and to supply the electric power to the first contact; and a second attachment having a second electric power feeding portion adapted to receive electric power, which causes the second semiconductor light emitting element to emit light, from the external power plug and to supply the electric power to the second contact, wherein the first attachment is operable to laterally surround and hold the first LED unit in a state in which the bottom surface and a part of the side surface of the first heat radiating board is exposed, and in which a space above the first light emitting element is open, and wherein the second attachment is operable to laterally surround and hold the second LED unit in a state in which the bottom surface and a part of the side surface of the second heat radiating board is exposed, and in which a space above the second light emitting element is open. 12. The vehicle headlamp according to claim 9, further comprising: a first attachment having an first electric power feeding portion adapted to receive electric power, which causes the first semiconductor light emitting element to emit light, from an external power plug and to supply the electric power to the first contact; and a second attachment having a second electric power feeding portion adapted to receive electric power, which causes the second semiconductor light emitting element to emit light, from the external power plug and to supply the electric power to the second contact, wherein the first attachment is operable to laterally surround and hold the first LED unit in a state in which the bottom surface and a part of the side surface of the first heat radiating board is exposed, and in which a space above the first light emitting element is open, and wherein the second attachment is operable to laterally surround and hold the second LED unit in a state in which the bottom surface and a part of the side surface of the second heat radiating board is exposed, and in which a space above the second light emitting element is open. 13. The vehicle headlamp according to claim 9, further comprising: a lamp body; and a cover which forms a chamber with the lamp body, wherein the projection lens, the first LED unit, the first reflector, the second LED unit, the second reflector, and the light source mount are housed in the chamber. 14. The vehicle headlamp according to claim 9, wherein the projection lens, the first reflector, and the second reflector are made of resin. 15. The vehicle headlamp according to claim 9, wherein the recesses are formed as cross-sectionally V-shaped grooves that extend in a horizontal direction respectively. 16. The vehicle headlamp according to claim 9, further comprising a connecting member formed as a molded part to be integral with the first reflector, wherein the projection lens is directly fixed to a front end portion of the connecting member.