Lighting fixture for saddle-riding type vehicle

Abstract

To provide a lighting fixture for saddle-riding type vehicle which secures down-sizing and further can secure a visibility angle because of simple constitution.SOLUTION: A pair of second control protrusion parts are located between a pair of first control protrusion parts, light internally reflected on the first control protrusion parts is emitted from an inner lens as first lateral side emission light, and the light internally reflected on the second control protrusion parts is emitted from the inner lens as second lateral side emission light, the first lateral side emission light and the second lateral side emission light are made as light emitted in such a direction that the angle is largest in right and left directions with front surface direction of such light as reference, the first lateral side emission light and the second lateral side emission light which are emitted from the first control protrusion part and the second control protrusion part are crossed, and the first lateral side emission light and the second lateral side emission light which are emitted from the first control protrusion part and the second control protrusion part are crossed.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to the technical field of a saddle-riding type vehicle lamp provided with an inner lens for controlling light emitted from a light source.

Background Art

[0002] Some vehicle lamps are configured such that light emitted from a light source is controlled by an inner lens and irradiated in a predetermined direction (see, for example, Patent Document 1 and Patent Document 2).

[0003] In the vehicle lamp described in Patent Document 1, light emitted from a light source is incident on the inner lens from each incident portion, and is refracted and internally reflected (total reflected) on each surface of the inner lens, so that light is emitted toward a predetermined region.

[0004] In the vehicle lamp described in Patent Document 2, a part of the light emitted from the light source is transmitted through the inner lens, incident on a diffusion member, diffused, and emitted, and another part of the light emitted from the light source is emitted in a predetermined direction by multiple internal reflections in the inner lens. Further, a part of the light emitted by multiple internal reflections in the inner lens is emitted in a direction at an angle of, for example, 70 degrees or more with respect to the front-rear direction as light for securing a lateral viewing angle which is the maximum angle at which the lit lamp can be visually recognized from the side.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, in the vehicle lamp as described above, as shown in Patent Document 2, it is necessary to secure a lateral viewing angle, and it is desirable to secure the viewing angle with a simple configuration.

[0007] In particular, in a lamp for a saddle-type vehicle such as a motorcycle used as a two-wheeled vehicle or a three-wheeled vehicle, the vehicle body size is often smaller than that of a four-wheeled vehicle or the like. It is more desirable to secure the viewing angle with a simple configuration while ensuring miniaturization.

[0008] Therefore, an object of the present invention is to secure a viewing angle with a simple configuration while ensuring miniaturization.

Means for Solving the Problems

[0009] The lamp for a saddle-type vehicle according to the present invention includes a light source that emits light and an inner lens that controls the light emitted from the light source. A pair of first control protrusions and a pair of second control protrusions that internally reflect the light emitted from the light source on the inner surface of the inner lens are provided in a separated state in the left-right direction. The pair of second control protrusions are positioned between the pair of first control protrusions. The light internally reflected by the first control protrusion is emitted from the inner lens as first lateral emission light, and the light internally reflected by the second control protrusion is emitted from the inner lens as second lateral emission light. The first lateral emission light and the second lateral emission light are the light emitted from the inner lens and emitted in the direction with the largest angle in the left-right direction with respect to the front direction. The first lateral emission light and the second lateral emission light emitted from the first control protrusion and the second control protrusion respectively positioned on one side in the left-right direction intersect, and the first lateral emission light and the second lateral emission light emitted from the first control protrusion and the second control protrusion respectively positioned on the other side in the left-right direction intersect.

[0010] As a result, the first side-emitted light and the second side-emitted light are emitted from the first control protrusion and the second control protrusion respectively located on one side and the other side in the left-right direction in a state where they intersect in the direction with the largest angle in the left-right direction with respect to the front direction.

Advantages of the Invention

[0011] According to the present invention, since the first side-emitted light and the second side-emitted light are emitted from the first control protrusion and the second control protrusion respectively located on one side and the other side in the left-right direction in a state where they intersect in the direction with the largest angle in the left-right direction with respect to the front direction, it is possible to make the first side-emitted light and the second side-emitted light pass through positions far from both left and right ends on the front surface of the inner lens, and at the same time, the configuration for ensuring the viewing angle is simplified, and the viewing angle can be ensured with a simple configuration while ensuring miniaturization.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments for implementing the lamp for a saddle-riding type vehicle of the present invention will be described with reference to the accompanying drawings. Hereinafter, a lamp for a saddle-riding type vehicle provided on a two-wheeled vehicle will be described. However, the lamp for a saddle-riding type vehicle of the present invention can also be applied to a lamp for a saddle-riding type vehicle attached to a vehicle such as a three-wheeled vehicle other than a two-wheeled vehicle.

[0014] In addition, hereinafter, as an example, a lamp for a saddle-riding type vehicle having the function of a clearance lamp will be described. However, the lamp for a saddle-riding type vehicle of the present invention is not limited to a configuration having the function of a clearance lamp, and can be widely applied to a lamp for a saddle-riding type vehicle having other functions.

[0015] Hereinafter, with the irradiation direction of light from the lamp for a saddle-riding type vehicle being forward, the front-rear, up-down, left-right directions will be described. However, the front-rear, up-down, left-right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

[0016] <Schematic Configuration of Lamp for Saddle-Riding Type Vehicle> First, the configuration of the lamp 1 for a saddle-riding type vehicle will be described (see FIGS. 1 to 4).

[0017] The lamp 1 for a saddle-riding type vehicle includes a lamp housing 2 having an opening at the front end and a cover 3 attached to the lamp housing 2 (see FIGS. 1 and 2). The lamp housing 2 and the cover 3 constitute a lamp outer casing 4. The internal space of the lamp outer casing 4 is formed as a lamp chamber 5.

[0018] A pair of substrate attachment portions 2a are provided on the lamp housing 2 so as to be separated from each other left and right. A pair of lens attachment portions 2b are provided on the lamp housing 2 so as to be separated from each other left and right, and the lens attachment portions 2b are located outside the substrate attachment portions 2a in the left-right direction.

[0019] The cover 3 has a covering portion 6 that covers the respective parts arranged in the lamp chamber 5 from the front, and an outer circumferential portion 7 that protrudes rearward from the outer peripheral portion of the covering portion 6, and the covering portion 6 and the outer circumferential portion 7 are integrally formed. The covering portion 6 is provided with a protruding portion 8 that is convex forward except for the outer peripheral portion, and the protruding portion 8 is composed of a front surface portion 9 and a circumferential surface portion 10 that protrudes substantially rearward from the outer peripheral portion of the front surface portion 9.

[0020] The front surface portion 9 is provided with front protruding portions 9a whose left and right both ends protrude forward more than other portions. The left and right both side portions of the circumferential surface portion 10 are each provided as a light transmissive portion 10a. A shielding step 10b for suppressing visibility from the outside is formed on the inner circumferential surface of the circumferential surface portion 10.

[0021] A substrate 11 facing the front-rear direction is arranged in the lamp chamber 5. The substrate 11 is attached to the substrate attachment portion 2a of the lamp housing 2 by screwing or the like. A light source 12 is mounted on the front surface of the substrate 11. As the light source 12, for example, a light emitting diode (LED) is used.

[0022] An inner lens 13 is arranged in the lamp chamber 5 in a state of covering the light source 12 from the front side. The inner lens 13 has a main body portion 14 formed in a horizontally long shape and a pair of attached protrusions 15 continuously provided on the left and right of the main body portion 14 (see FIGS. 2 to 4).

[0023] The main body portion 14 is composed of a control portion 16 formed with various lens steps and a frame portion 17 continuous with the outer circumferential surface of the rear end portion in the control portion 16.

[0024] The front surface portion of the control portion 16 is provided as a light emitting portion 18 from which light is emitted, and a plurality of diffusion steps 19, two first control protrusions 20, and two second control protrusions 21 are formed on the front surface of the light emitting portion 18.

[0025] The diffusion step 19 is, for example, a fisheye step, and is formed over the entire portion where the first control protrusion 20 and the second control protrusion 21 are not formed. The first control protrusion 20 is formed at both left and right ends of the light emitting portion 18, and has a shape that protrudes forward and extends vertically. The second control protrusion 21 is formed at positions spaced apart left and right closer to the center in the left-right direction of the light emitting portion 18, and is positioned between the two first control protrusions 20 in the left-right direction. The second control protrusion 21 has a shape that protrudes forward and extends vertically, similar to the first control protrusion 20.

[0026] Both the first control protrusion 20 and the second control protrusion 21 have the function of internally reflecting and emitting light, and the light emitted from the first control protrusion 20 and the light emitted from the second control protrusion 21 are made to travel in substantially opposite directions in the left-right direction.

[0027] A pair of incident protrusions 22 protruding rearward are provided on the control unit 16, spaced apart left and right. The pair of incident protrusions 22 are formed in a substantially triangular prism shape, with the inner portion in the left-right direction being located at the rearmost side and the outer portion in the left-right direction being located at the foremost side. The innermost surfaces of the pair of incident protrusions 22 in the left-right direction are formed as first incident surfaces 23 facing each other in the left-right direction. A total reflection surface 24 inclined so as to be displaced forward as it goes from the inner side to the outer side in the left-right direction is formed on the pair of incident protrusions 22, and the inner edge of the total reflection surface 24 in the left-right direction is continuous with the rear edge of the first incident surface 23. A total reflection step is formed on the total reflection surface 24.

[0028] A second incident surface 25 facing rearward is formed on the control unit 16 between the pair of incident protrusions 22. A lens step is formed on the second incident surface 25. A light source 12 mounted on the substrate 11 is positioned directly behind the central portion of the second incident surface 25.

[0029] A notch 17a that opens rearward and extends left and right is formed at the lower end of the frame-shaped portion 17. The front surface of the frame-shaped portion 17 is formed as a gentle inclined surface 17b that is displaced rearward as it goes from the inner circumference to the outer circumference.

[0030] By forming the inclined surface 17b as described above on the inner lens 13, when the light emitted from the light source 12 and incident on the inner lens 13 leaks out from the inclined surface 17b, a so-called point light state in which the leaked light is refracted by the inclined surface 17b and locally strong light is emitted is suppressed. Therefore, it is possible to improve the design property when the saddle-riding type vehicle lamp 1 is visually recognized from the outside.

[0031] The attached protrusion 15 protrudes obliquely rearward and laterally (outward) from both left and right ends of the frame portion 17.

[0032] The rear end portion of the inner lens 13 is attached to the lens attachment portion 2b of the lamp housing 2 by screwing or the like. In a state where the inner lens 13 is attached to the lamp housing 2, the rear surface of the frame portion 17 is brought into a state of being close to or in contact with the front surface of the substrate 11, and a space vertically penetrating the front side of the substrate 11 is formed by the notch 12a (see FIG. 1). Therefore, the heat generated when the light source 12 is driven is released downward by the space formed by the notch 12a, and the temperature rise of the light source 12 and the substrate 11 is suppressed, and a good light emission state of the light source 12 can be ensured.

[0033] In addition, in the saddle-riding type vehicle lamp 1, notches may be formed in the upper part or side part of the inner lens 13, and the heat generated when the light source 12 is driven may be released from the space formed by these notches.

[0034] In the saddle-riding type vehicle lamp 1 configured as described above, the cover 3 is coupled to the lamp housing 2, and required members such as the substrate 11 and the inner lens 13 are arranged in the lamp chamber 5.

[0035] At least a part of the protruding portion 8 of the cover 3 is positioned forward from the arrangement hole 100a formed in the vehicle body 100. For example, the front surface portion 9 and the front end portion of the peripheral surface portion 10 are protruded forward from the vehicle body 100 (see FIGS. 1 and 2).

[0036] In the lamp 1 for a saddle-riding type vehicle, when light is emitted from the light source 12, the emitted light is incident on the control part 16 of the inner lens 13 from the first incident surface 23 and the second incident surface 25 (see Fig. 5).

[0037] The light A incident on the inner lens 13 from the first incident surface 23 is internally reflected (total reflected) by the total reflection surface 24 except for a part and heads toward the light emission part 18. At this time, the light that reaches the diffusion step 19 toward the light emission part 18 is diffused by the diffusion step 19 and is transmitted through the front part 9 of the cover 3 as the main light distribution A1 and irradiated outward. Also, the light that reaches the first control protrusion 20 toward the light emission part 18 is internally reflected at an angle close to a right angle by the first control protrusion 20 and heads toward the central side in the left-right direction of the inner lens 13 as the first side-emitted light A2 and is transmitted through the light transmission part 10a of the cover 3 and irradiated outward as light for securing a side viewing angle. The first side-emitted light A2 is light emitted in a direction having the largest angle in the left-right direction with respect to the front direction among the light emitted from the inner lens 13, for example, a direction of about 80 degrees.

[0038] On the other hand, the light B incident on the inner lens 13 from the second incident surface 25 is refracted or travels straight at the second incident surface 25 and heads toward the light emission part 18. At this time, the light that reaches the diffusion step 19 toward the light emission part 18 is diffused by the diffusion step 19 and is transmitted through the front part 9 of the cover 3 as the main light distribution B1 and irradiated outward. Also, the light that reaches the second control protrusion 21 toward the light emission part 18 is internally reflected at an angle close to a right angle by the second control protrusion 21 and heads toward the side opposite to the central side in the left-right direction of the inner lens 13 as the second side-emitted light B2 and is transmitted through the light transmission part 10a of the cover 3 and irradiated outward as light for securing a side viewing angle. The second side-emitted light B2 is light emitted in a direction having the largest angle in the left-right direction with respect to the front direction among the light emitted from the inner lens 13, for example, a direction of about 80 degrees.

[0039] As described above, the first side-emitted light A2 and the second side-emitted light B2 are internally reflected at an angle close to a right angle by the first control protrusion 20 and the second control protrusion 21. The first side-emitted light A2 travels toward the central side in the left-right direction of the inner lens 13, and the second side-emitted light B2 travels toward the side opposite to the central side in the left-right direction of the inner lens 13. Therefore, the first side-emitted light A2 and the second side-emitted light B2 are lights that intersect in front of the inner lens 13.

[0040] Also, two second control protrusions 21 are positioned between the two first control protrusions 20 in the left-right direction. Therefore, the first side-emitted light A2 internally reflected by the right first control protrusion 20 is emitted from the left light transmission portion 10a, and the first side-emitted light A2 internally reflected by the left first control protrusion 20 is emitted from the right light transmission portion 10a. The second side-emitted light B2 internally reflected by the right second control protrusion 21 is emitted from the right light transmission portion 10a, and the second side-emitted light B2 internally reflected by the left second control protrusion 21 is emitted from the left light transmission portion 10a.

[0041] As described above, in the lamp 1 for a straddle-type vehicle, the second control protrusion 21 is positioned between the first control protrusions 20, and the first side-emitted light A2 and the second side-emitted light B2 emitted from the first control protrusion 20 and the second control protrusion 21 positioned on one side in the left-right direction intersect, and the first side-emitted light A2 and the second side-emitted light B2 emitted from the first control protrusion 20 and the second control protrusion 21 positioned on the other side in the left-right direction intersect.

[0042] Accordingly, the first side-emitted light A2 and the second side-emitted light B2 are emitted from the first control protrusion 20 and the second control protrusion 21, which are located on one side and the other side in the left-right direction, respectively, in a state where they intersect in the left-right direction at the largest angle with respect to the front direction. As a result, it is possible to make the first side-emitted light A2 and the second side-emitted light B2 pass through positions far from both left and right ends on the front surface of the inner lens 13, and the configuration for ensuring the viewing angle is simplified, and the viewing angle can be ensured with a simple configuration while ensuring miniaturization.

[0043] Further, at least a part of the side portions on both left and right sides of the cover 3 protrudes forward from the vehicle body 100, and the portion protruding forward from the vehicle body on the side portion is provided as a light transmission portion 10a through which the first side-emitted light A2 and the second side-emitted light B2 are transmitted.

[0044] Accordingly, since the first side-emitted light A2 and the second side-emitted light B2 are transmitted through a part of the cover 3 protruding forward from the vehicle body 100 and irradiated, the viewing angle can be ensured with a simple configuration.

[0045] Furthermore, the front end portion of the inner lens 13 is provided as a light emission portion 18 from which light is emitted, and the first control protrusion 20 is located at both left and right end portions of the light emission portion 18.

[0046] Accordingly, since the first side-emitted light A2 and the second side-emitted light B2 are emitted from both left and right end portions of the light emission portion 18, it is possible to reduce the amount of protrusion forward from the vehicle body of the light transmission portion 10a, and the miniaturization of the lamp 1 for a saddle-riding type vehicle can be achieved.

[0047] Furthermore, the front surface portion 9 of the cover 3 is provided as a front protrusion 9a in which both left and right end portions protrude forward more than other portions.

[0048] Accordingly, since the front protrusions 9a at both left and right end portions protrude forward more than other portions on the front surface portion 9 of the cover 3, the front protrusions 9a have a function as reinforcing ribs, and the strength of the cover 3 can be improved.

[0049] In addition, a shielding step 10b for suppressing the visibility from the outside is formed on the front protrusion 9a which is a portion protruding forward from the vehicle body 100 of the cover 3.

[0050] Therefore, when the lamp is not lit, it becomes difficult to visually recognize the members arranged inside the lamp chamber 5 from the front protrusion 9a, and the shielding step 10b can be visually recognized. Thus, the design property of the lamp 1 for a saddle-riding type vehicle can be improved.

[0051] In the lamp 1 for a saddle-riding type vehicle, in addition to the pair of first control protrusions 20 and the pair of second control protrusions 21 on the inner lens 13, it is also possible to adopt a configuration in which at least one of a first auxiliary control protrusion or a second auxiliary control protrusion is formed.

[0052] In addition to the first control protrusion 20 and the second control protrusion 21, for example, when the first auxiliary control protrusion 26 is formed on the inner lens 13, it is desirable that the two first auxiliary control protrusions 26 are respectively formed in the vicinity of the first control protrusion 20 (see FIG. 6). The first auxiliary control protrusion 26 is positioned between the first control protrusion 20 and the second control protrusion 21 inside the first control protrusion 20 in the left-right direction.

[0053] In such a configuration, the side-emitted light C reflected from the inner surface by the first auxiliary control protrusion 26 on the right side is emitted from the light transmission portion 10a on the left side, and the side-emitted light C reflected from the inner surface by the first auxiliary control protrusion 26 on the left side is emitted from the light transmission portion 10a on the right side. Therefore, in this case, the first side-emitted light A2 emitted from the first control protrusion 20 and the side-emitted light C are irradiated in substantially the same direction, and the luminance of the light for ensuring the visual angle on the side can be improved.

[0054] In the case of the lamp 1 for a saddle-ride type vehicle, the number of the first auxiliary control protrusions and the second auxiliary control protrusions formed is arbitrary, and the number of the first auxiliary control protrusions and the second auxiliary control protrusions may be determined according to the required luminance of the light for ensuring the lateral viewing angle and the like. However, when at least one of the first auxiliary control protrusion or the second auxiliary control protrusion is formed on the inner lens 13, since the formation area of the diffusion step 19 may be reduced, it is desirable to determine the number of the first auxiliary control protrusions and the second auxiliary control protrusions on the condition that the required luminance is satisfied by the main light distributions A1 and B1.

Explanation of Signs

[0055] 1 Lamp for saddle-ride type vehicle 2 Lamp housing 3 Cover 5 Lamp chamber 9 Front part 9a Front protrusion 10a Light transmission part 10b Shielding step 12 Light source 13 Inner lens 18 Light emitting part 20 First control protrusion 21 Second control protrusion 100 Vehicle body

Claims

1. A light source that emits light; An inner lens that controls the light emitted from the light source, A pair of first control protrusions and a pair of second control protrusions that internally reflect the light emitted from the light source are provided on the inner lens and spaced apart from each other in the left-right direction, A pair of the second control protrusions are positioned between a pair of the first control protrusions, The light reflected internally by the first control protrusion is emitted from the inner lens as a first side emitted light, The light reflected internally by the second control protrusion is emitted from the inner lens as a second side emitted light, The first side-emission light and the second side-emission light are lights emitted from the inner lens in a direction having the largest angle in the left-right direction with respect to the front direction, the first side-emitted light and the second side-emitted light emitted from the first control protrusion and the second control protrusion, which are positioned on one side in the left-right direction, respectively, intersect with each other; The first side-emission light and the second side-emission light emitted from the first control protrusion and the second control protrusion positioned on the other side in the left-right direction cross each other. Lighting fixtures for saddle-type vehicles.

2. A lamp housing and a cover are provided, which are combined to form a lamp chamber therein, At least the light source and the inner lens are disposed in the lamp chamber, At least a portion of the left and right side surface portions of the cover protrude forward from the vehicle body, A portion of the side surface protruding forward from the vehicle body is provided as a light transmitting portion through which the first side emitted light and the second side emitted light are transmitted.

2. The lamp for a saddle-type vehicle according to claim 1.

3. The front end of the inner lens is provided as a light emitting portion from which light is emitted, The first control protrusions are located at both left and right ends of the light emitting portion.

3. A lamp for a saddle-type vehicle according to claim 2.

4. The front surface of the cover is provided with front protrusions at both left and right ends that protrude forward from other portions.

4. A lamp for a saddle-ride type vehicle according to claim 2 or 3.

5. A shielding step is formed on the portion of the cover that protrudes forward from the vehicle body to suppress visibility from the outside.

4. A lamp for a saddle-ride type vehicle according to claim 2 or 3.

Images