JP2016159704A - Head lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head lamp for a vehicle capable of emitting illumination light with targeted illuminance and irradiation range without damaging a streamline shape of a vehicle while making a device configuration compact, and further presenting necessary information to the front of the vehicle.SOLUTION: A head lamp 1 for a vehicle includes a main light source unit 10, an auxiliary light source unit 20, and a support body 30. The main light source unit 10 has a plurality of first semiconductor light-emitting elements L1 arranged in a uniaxial direction to be simultaneously lighted. The auxiliary light source unit 20 has a plurality of second semiconductor light-emitting elements L2 arranged in a first axial direction to be able to be lighted simultaneously or sequentially in the first axial direction. The support body 30 includes a first housing part 31 for housing the main light source unit 10, and a second housing part 32 for housing the auxiliary light source unit 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle headlamp used, for example, in a railcar lamp.

  Conventionally, as a lamp provided in a railway vehicle, a projector type lamp having a discharge bulb such as a metal halide bulb as a light source has been adopted. This railcar lamp is configured to reflect light from a discharge light emitting part of a discharge bulb with a reflector, collect the light with a condensing lens, and irradiate the vehicle forward or backward (see, for example, Patent Document 1).

  On the other hand, in recent years, as a new light source that replaces a discharge bulb, it has been proposed to use a light emitting diode (LED), which is a light emitting element with low power consumption and a long lifetime, for a railcar lamp. For example, Patent Document 2 discloses a railway including a first light emitting diode that emits red light, a second light emitting diode that emits white light, and a housing that forms a lamp chamber in which the first and second light emitting diodes are disposed. A vehicular lamp is disclosed.

JP 2001-23417 A JP 2014-19394 A

  By the way, in recent years, for the purpose of reducing air resistance, improving design, etc., the leading vehicles of the Shinkansen and limited express trains are widely adopted that have a streamline shape. For this reason, the design freedom of the lamp | ramp which comprises the headlamp as a headlamp is being restrict | limited.

  For example, since the lamp described in Patent Document 1 requires a large dimension in the depth direction, the entire lamp cannot be configured compactly. On the other hand, in the lamp described in Patent Document 2, when it is installed in a streamlined leading vehicle, an irradiation range intended for white light with a light quantity required as a headlamp without impairing the streamline shape of the vehicle. It is not easy to properly emit illumination light.

  Further, for example, in a railway station, for example, it is common to notify a passenger who is waiting at the home with a local announcement, an electric bulletin board or the like about the approach of a passing train. However, it is not always possible to notify all passengers of the entrance of a passing train by just reporting on the premises.For passengers who are not aware of the notification, the vehicle It may be misunderstood as stopping.

  In view of the circumstances as described above, an object of the present invention is to make it possible to emit illumination light at a desired illuminance and irradiation range without compromising the streamline shape of the vehicle while making the device configuration compact, and further to the front of the vehicle. It is an object of the present invention to provide a vehicle headlamp capable of presenting necessary information.

In order to achieve the above object, a vehicle headlamp according to an aspect of the present invention includes a main light source unit, an auxiliary light source unit, and a support.
The main light source unit includes a plurality of first semiconductor light emitting elements that are arranged in a uniaxial direction and are turned on simultaneously.
The auxiliary light source unit includes a plurality of second semiconductor light emitting elements that are arranged in the first axial direction and can be turned on simultaneously or sequentially in the first axial direction.
The support includes a first housing portion that houses the main light source unit and a second housing portion that houses the auxiliary light source unit.

In the vehicle headlamp described above, the main light source unit has a plurality of first semiconductor light emitting elements arranged in a tandem in a uniaxial direction. The light can be emitted properly.
In addition, since the vehicle headlamp includes the auxiliary light source unit, significant information can be presented to the front of the vehicle depending on the lighting state of the second semiconductor light emitting element. For example, by sequentially lighting the plurality of second semiconductor light emitting elements in the first axial direction, it is possible to present some information such as approaching and passing of the vehicle to the front.
Furthermore, since the vehicle headlamp includes a support body that accommodates the main light source unit and the auxiliary light source unit, the entire headlamp can be configured compactly.

The plurality of first semiconductor light emitting elements may be arranged in a second axial direction that obliquely intersects the first axial direction.
The second axial direction is typically a vertical direction or a horizontal direction orthogonal to the front of the vehicle. As a result, it is possible to appropriately emit illumination light having a necessary illuminance within a predetermined range without impairing the streamline shape of the vehicle.

The main light source unit may include a plurality of main light source units arranged in the first axial direction and / or a third axial direction orthogonal to the first axial direction.
This makes it possible to easily realize the illuminance, irradiation range, optical axis, and the like required for the headlamp.

The plurality of second semiconductor light emitting elements are typically configured to be capable of emitting white light or red light, but are not limited thereto, and emit light of other colors such as yellow and blue. It may be configured to be able to.
For example, when the vehicle headlamp is used as a lamp attached to the front portion of a railway vehicle, the plurality of second semiconductor light emitting elements are configured to emit white light. Further, when the vehicle headlamp is used as a lamp attached to the rear part of the railway vehicle, the plurality of second semiconductor light emitting elements are configured to emit red light.
The vehicle headlamp is not limited to a railway vehicle, and can also be applied to a headlamp of a general vehicle such as a passenger car, a merchant, or a motorcycle.

  As described above, according to the present invention, it is possible to emit illumination light in a target illuminance and irradiation range without compromising the streamline shape of the vehicle while making the device configuration compact, and further necessary to the front of the vehicle. It becomes possible to present information.

1 is a perspective view showing an entire vehicle headlamp according to an embodiment of the present invention. It is a schematic perspective view which shows the railway vehicle provided with the said headlamp. It is a top view of the said headlamp. It is a front view of the said headlamp. It is a right view of the said headlamp. FIG. 5 is a schematic enlarged sectional view taken along line AA in FIG. 4. It is a schematic perspective view of the principal part which shows the structure of the main light source unit in the said headlamp. It is a front view which shows an example of the lighting form of the auxiliary light source unit in the said headlamp.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a headlamp for a railway vehicle will be described as an example.

FIG. 1 is a perspective view showing the entirety of a vehicle headlamp (hereinafter simply referred to as a headlamp) according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a state when the headlamp of this embodiment is attached to a railway vehicle.
In the figure, the X axis, the Y axis, and the Z axis indicate three axial directions orthogonal to each other, the X axis and the Y axis are horizontal (particularly, the Y axis direction is the traveling direction of the vehicle), and the Z axis is It corresponds to each direction (the same applies to the following figures).

  The headlamp 1 of the present embodiment is used as a lamp for a railway vehicle, and is configured as a front marker lamp or a rear marker lamp that is attached to each of the left and right sides of a leading vehicle or a trailing vehicle. As shown in FIG. 2, the vehicle T has a streamline shape, and the headlamps 1 are respectively attached to both side surfaces of the front portion. The left and right headlamps 1 have the same configuration, and their shapes are symmetrical on the left and right. Here, the left headlamp will be described.

  3 is a plan view of the headlamp 1, FIG. 4 is a front view thereof, FIG. 5 is a right side view thereof, and FIG. 6 is a schematic enlarged sectional view taken along line AA in FIG.

  The headlamp 1 according to this embodiment includes a main light source unit 10, an auxiliary light source unit 20, a support 30, a cover 40, and a housing 50. The headlamp 1 has a tapered shape toward the front, and its front (front) side is streamlined.

  The main light source unit 10 includes a plurality of (in this example, five) main light source units 10A1, 10A2, 10B1, 10B2, and 10B3 (hereinafter, the main light source units 10A1, 10A2, and 10B1 unless otherwise described). , 10B2 and 10B3 are collectively referred to as a main light source unit 10).

  The plurality of main light source units 10 each have an optical axis oriented in the same direction, and typically, each optical axis is set parallel or substantially parallel to the Y-axis direction. In the present embodiment, a total of five main light source units 10 are used, two on the upper side and three on the lower side. The number of main light source units 10 is not limited to this, and a single main light source unit 10 may be provided.

  The two main light source units 10A1 and 10A2 arranged on the upper stage side are used in, for example, a low beam light source, and are arranged in the a-axis direction obliquely intersecting the X-axis direction. As shown in FIGS. 1 and 3, the a-axis direction corresponds to an axial direction obtained by rotating the X axis counterclockwise by an angle θ as viewed from above. As shown in FIGS. 1 and 3, the main light source unit 10A1 located on the inner side is arranged so as to protrude by a predetermined length forward from the main light source unit 10A2 located on the outer side.

  On the other hand, the three main light source units 10B1, 10B2, and 10B3 arranged on the lower side are used, for example, as a high beam light source, and are arranged in the a-axis direction similarly to the main light source units 10A1 and 10A2. As shown in FIGS. 1 and 3, the main light source unit 10B2 located on the center side is disposed so as to protrude by a predetermined length forward from the main light source unit 10B3 located on the outside. On the other hand, the main light source unit 10B1 located on the inner side is arranged so as to protrude by a predetermined length forward from the main light source unit 10B2 located on the center side.

  The main light source unit for the low beam and the high beam is not limited to the above example, and can be set as appropriate. For example, the two main light source units 10A1 and 10A2 arranged in the upper stage may be set for the high beam, and the three main light source units 10B1 to 10B3 arranged in the lower stage may be set for the low beam.

  The main light source units 10A1 and 10A2 and 10B1 to 10B3 are arranged in the a-axis direction, so that the headlamp 1 is mounted on the vehicle T without excessively projecting the headlamp 1 from the side of the streamlined vehicle T. Since it can be attached, it is possible to prevent the streamline shape of the vehicle T from being damaged. Therefore, the a-axis direction can be appropriately set according to the shape of the side portion, the angle with respect to the traveling direction, and the like on the vehicle T to which the headlamp 1 is attached.

  Further, as shown in FIGS. 5 and 6, in the main light source unit 10 arranged in multiple stages above and below, the main light source units 10B1, 10B2, and 10B3 located in the lower stage are more than the main light source units 10A1 and 10A2 located in the upper stage. Is also arranged so as to protrude forward by a predetermined length. Thereby, since the configuration of the entire headlamp 1 becomes streamlined, the headlamp 1 can be attached to the vehicle T without impairing the streamline shape of the vehicle T.

  Further, in the present embodiment, the main light source unit 10 is composed of a plurality of main light source units 10A1, 10A2, 10B1 to 10B3 arranged in two axial directions (a-axis direction and Z-axis direction) orthogonal to each other. Therefore, it is possible to easily realize the illuminance, irradiation range, optical axis and the like required for the headlamp.

  FIG. 7 is a schematic perspective view of a main part showing the configuration of the main light source unit 10.

  Each main light source unit 10 has the same configuration, and as shown in FIG. 7, a substantially flat synthetic resin cylinder 11 crushed in the Z-axis direction and a front end portion of the cylinder 11. And a plurality of lens parts 120 arranged at equal intervals in the X-axis direction. Inside the cylindrical body 11, a plurality of first semiconductor light emitting elements L1 and a first circuit board S1 that supports them are respectively incorporated (see FIG. 6).

  The plurality of first semiconductor light emitting elements L1 are each configured by an LED capable of emitting white light. The LED may be a semiconductor chip or a package component (for example, a shell type) in which a lens is provided at the exit port. The number of the plurality of first semiconductor light emitting elements L1 is not particularly limited, and four semiconductor light emitting elements are used in the present embodiment.

  The plurality of first semiconductor light emitting elements L1 have an X-axis direction (second axis direction) that obliquely intersects the a-axis direction (first axis direction) so as to face the plurality of lens units 120 of the transmission unit 12. Are arranged at equal intervals. The plurality of first semiconductor light emitting elements L <b> 1 are configured to be turned on simultaneously, and the emitted light is projected forward through the lens unit 120.

  As shown in FIG. 6, the first circuit board S <b> 1 is installed on the front side of the cylindrical body 11 with the mounting surface facing forward (Y-axis direction). The first circuit board S1 is electrically connected to a power supply unit (not shown), and supplies power to the plurality of first semiconductor light emitting elements L1 mounted on the mounting surface.

  On the other hand, the auxiliary light source unit 20 is disposed below the main light source unit 10. The front shape of the auxiliary light source unit 20 has a streamline shape formed along the lower edge of the headlamp 1, as shown in FIGS. As shown in FIG. 6, the auxiliary light source unit 20 includes a cylindrical body 21 made of synthetic resin, and a light transmitting portion 22 that covers a front end portion of the cylindrical body 21. Inside the cylindrical body 21, a plurality of second semiconductor light emitting elements L2 and a second circuit board S2 that supports these are respectively incorporated (see FIG. 6).

  The mounting surface of the second circuit board S2 is disposed upward by a predetermined angle with respect to the Y-axis direction. The inner surface of the cylindrical body 21 functions as a reflecting surface, and guides the emitted light from the second semiconductor light emitting element L2 to the light transmitting portion 22 while reflecting it. The translucent part 22 faces the inner surface of the cover 40 and is arranged obliquely so as to correspond to the streamline shape of the cover 40. The translucent part 22 may have a light diffusion function.

  The plurality of second semiconductor light emitting elements L2 are each configured by an LED capable of emitting white light or red light. The LED may be a semiconductor chip as in the case of the first semiconductor light emitting element L1, or may be a package component (for example, a bullet type) provided with a lens at the exit port. The plurality of second semiconductor light emitting elements L2 are arranged at intervals in the a-axis direction from one side end portion of the cylindrical body 21 toward the other side end portion. The plurality of second semiconductor light emitting elements L2 can be turned on simultaneously or sequentially in the a-axis direction.

For example, when the headlamp 1 functions as a headlamp (front indicator lamp), the auxiliary light source unit 20 can sequentially turn on the plurality of second semiconductor light emitting elements L2 in the a-axis direction with white light. Configured to be possible.
On the other hand, when the headlamp 1 functions as a tail lamp (rear indicator lamp), the auxiliary light source unit 20 is configured to simultaneously turn on the plurality of second semiconductor light emitting elements L2 with red light.

  FIGS. 8A to 8E are front views illustrating an example of a lighting mode of the auxiliary light source unit 20 when the headlamp 1 functions as a headlamp.

  For example, the auxiliary light source unit 20 turns on the auxiliary light LS sequentially from the left end to the right end in the order shown in FIG. 8B, C, D, and E from the no-light state shown in FIG. 8A. FIG. 8E shows a state where all of the plurality of semiconductor light emitting elements L2 of the auxiliary light source unit 20 are turned on. After a predetermined time has elapsed, the state returns to the no-light state shown in FIG. 8A again, and the sequential lighting state shown in FIGS. Is repeated. The auxiliary light source unit 20 may cause the plurality of second semiconductor light emitting elements L2 to emit light so that the auxiliary light LS continuously transitions in the states shown in FIGS. 8A to E, and each state is maintained for a predetermined time. The plurality of second semiconductor light emitting elements L2 may emit light so as to make a transition in stages. As described above, the auxiliary light source unit 20 is configured as an indicator lamp that presents predetermined information to the front of the vehicle rather than as a light source for illumination.

  For example, in a railway station or the like, it is common to notify the passengers who are waiting at the home by a local announcement, an electric bulletin board or the like about the approach of a passing vehicle. However, it is not always possible to notify all passengers of the entry of a passing vehicle by notification only on the premises. For users who are not aware of the notification, the vehicle is It may be misunderstood as stopping.

  According to the present embodiment, information indicating that the vehicle is a passing vehicle is displayed on the auxiliary light source unit 20 provided in the headlamp 1 of the vehicle, thereby alerting the user waiting at the home. Can do. Thereby, it becomes possible to notify the user who has seen the entering vehicle that the vehicle is a passing vehicle.

  As information which shows that it is a passing vehicle, what changed the lighting state of the auxiliary lamp LS continuously or intermittently as shown to FIG. In addition to the form in which the length of the lighting area of the auxiliary lamp LS changes with time as in the above example, the irradiation area and color of the auxiliary lamp LS are changed, or all the semiconductor light emitting elements L2 in the auxiliary light source unit 20 are changed. Or may blink.

  The support 30 is made of, for example, a synthetic resin material and is accommodated in the housing 50. The support 30 includes a first housing part 31 that houses the light source unit 10 and a second housing part 32 that houses the auxiliary light source unit 20.

  The first accommodating portion 31 includes a plurality of first accommodating portions 31A1, 31A2, 31B1, 31B2, and 31B3 formed so as to correspond to the respective main light source units 10 (hereinafter, unless otherwise described) 1st accommodating part 31A1, 31A2, 31B1, 31B2, and 31B3 are named the 1st accommodating part 31).

  The 1st accommodating part 31 is comprised so that each main light source unit 10 can be positioned and fixed. Each main light source unit 10 is fixed at a position as shown in FIG. 6 by being inserted from the rear side of the support 30 toward the front side, for example. In this case, as schematically shown in FIG. 6, an engagement portion 33 that engages with the rear end portion of the main light source unit 10 may be provided at the rear end portion of the support member 30.

Each first accommodating portion 31 is further provided with a reflecting surface 34 that diffusely reflects the illumination light emitted from each main light source unit 10. As shown in FIGS. 1 and 3, the reflection surface 34 is formed of a textured surface that is partially formed on the bottom surface adjacent to the front end of each main light source unit 10.
The reflective surface 34 may be formed of a white coating film, a metal film, a vapor deposition film, or the like. The reflection surface 34 is formed in a triangular shape having a hypotenuse parallel to the front edge portion of the main light source unit 10, but the shape is not limited to this, and may be formed over the entire bottom surface portion.

  The 2nd accommodating part 32 is formed along the lower edge part of the support body 30, and accommodates the auxiliary light source unit 20 inside. The 2nd accommodating part 32 has an opening which exposes the translucent part 22 of the auxiliary light source unit 20 to the outside, and the cylindrical body 21 is fixed to the inner periphery of the opening.

  The cover 40 is made of an injection-molded body made of a transparent plastic material, and is fixed to the housing 50 so as to cover the front surface of the support body 30. The cover 40 has a streamline shape as a whole, and is configured to form a surface substantially continuous with the side surface of the vehicle T. The cover 40 is typically fixed to the support 30 or the housing 50 through a seal ring (not shown).

  The housing 50 is made of metal or synthetic resin, and has a space for accommodating the support 30. The casing 50 is provided with a cable or a terminal portion for supplying power from the outside of the headlamp 1 to each main light source unit 10 and auxiliary light source unit 20. The housing 50 further accommodates a mechanism unit for adjusting the optical axes of the main light source units 20 and the auxiliary light source units 20.

  In the headlamp 1 of the present embodiment configured as described above, the main light source unit 10 includes a plurality of first semiconductor light emitting elements L1 arranged in multiples in a uniaxial direction (X-axis direction). Illumination light having a necessary illuminance can be appropriately emitted in a necessary range toward the front of T.

  Moreover, since the headlamp 1 of the present embodiment includes the auxiliary light source unit 20, significant information can be presented in front of the vehicle T by the lighting form of the second semiconductor light emitting element L2. For example, by sequentially lighting the plurality of second semiconductor light emitting elements L2 in the a-axis direction, information such as approaching and passing of the vehicle can be presented to the front.

  Furthermore, since the headlamp 1 of the present embodiment includes the support 30 that accommodates the main light source unit 10 and the auxiliary light source unit 20, the entire headlamp can be configured in a compact manner.

  As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course, a various change can be added.

  For example, in the above embodiment, the example in which the plurality of first semiconductor light emitting elements L1 in the main light source unit 10 are arranged in the X-axis direction has been described. However, the present invention is not limited thereto, and the first semiconductor light emitting elements L1 For example, they may be arranged in the Z-axis direction. The plurality of main light source units 10 are not limited to the example arranged in the a-axis direction and the Z-axis direction, but may be arranged in at least one axis direction.

  Furthermore, in the above embodiment, the description has been given by taking the railway vehicle headlamp as an example of the vehicle headlamp. However, the present invention is not limited to this, and can be applied to a headlamp of a general vehicle such as a passenger car, a commercial vehicle, or a motorcycle. It is. In this case, the auxiliary light source unit can function as, for example, a direction indicator.

DESCRIPTION OF SYMBOLS 1 ... Headlamp 10, 10A1, 10A2, 10B1, 10B2, 10B3 ... Main light source unit 20 ... Auxiliary light source unit 30 ... Support body 31, 31A1, 31A2, 31B1, 31B2, 31B3 ... 1st accommodating part 32 ... 2nd Housing 40 ... Cover 50 ... Housing L1 ... First Semiconductor Light Emitting Element L2 ... Second Semiconductor Light Emitting Element

Claims (5)

A main light source unit having a plurality of first semiconductor light emitting elements arranged in a uniaxial direction and simultaneously lit,
An auxiliary light source unit having a plurality of second semiconductor light emitting elements arranged in the first axial direction and capable of being turned on simultaneously or sequentially in the first axial direction;
A vehicle headlamp comprising: a support body having a first housing portion that houses the main light source unit and a second housing portion that houses the auxiliary light source unit. The vehicle headlamp according to claim 1,
The plurality of first semiconductor light emitting elements are respectively arranged in a second axial direction that obliquely intersects the first axial direction. The vehicle headlamp according to claim 1 or 2,
The main light source unit includes a plurality of main light source units arranged in the first axial direction and / or a third axial direction orthogonal to the first axial direction. The vehicle headlamp according to any one of claims 1 to 3,
The plurality of second semiconductor light emitting elements are configured to be capable of emitting white light or red light. The vehicle headlamp according to claim 4,
The vehicle is a railway vehicle;
The headlamp is a lamp attached to a front part and / or a rear part of the railway vehicle.

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