JPH0656903U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] Even though it is a lamp using a light bulb, it is as if many LED light sources are arranged at the time of lighting. A light control means for controlling light passing through the inner lens into parallel light is provided, a fisheye lens step is formed on an outer surface of the inner lens, and a fisheye lens step is formed on an inner surface of the outer lens. The focus of each fish-eye lens step is formed so as to be substantially on the inner surface of the outer lens.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a new vehicular lamp. More specifically, a new vehicular lamp that uses a light bulb, but can be made to appear as if a large number of light emitting diodes (hereinafter, referred to as “LEDs”) are arranged at the time of lighting. It is the one we are trying to provide.

[0002]

[Prior art]

 Vehicle lamps, for example, stop lamps for vehicles include a lamp having a light source as a light source and a lamp having an LED as a light source.

The former is, for example, one in which light emitted from a light bulb is controlled into parallel light by a reflecting mirror or a lens and the parallel light is diffused by a fisheye lens to obtain a desired light distribution. In the latter, for example, a large number of LEDs are arranged along the inner surface of the lens, and a fish-eye lens formed corresponding to each LED diffuses the LED light to obtain a desired light distribution. It is a thing.

[0004]

[Problems to be solved by the device]

 However, the above two types of vehicle stop lamps have the following problems.

That is, in the vehicle stop lamp using the former light bulb, since only one light source is required, the cost can be made relatively low, but the entire surface of the lens shines as if it were flat. However, there was a problem that it did not have a high brightness feeling and looked bad.

Further, in the latter vehicle stop lamp using the latter LED as a light source, a portion of the lens surface of the outer lens facing each LED can be made to shine more, and a high-luminance feeling can be produced. However, there is a problem in that a large number of LEDs must be used and the cost becomes high.

[0007]

[Means for Solving the Problems]

 Therefore, in order to solve the above-mentioned problems, the vehicular lamp of the present invention is provided with a light control means for controlling the light passing through the inner lens to be parallel light, and forming the fisheye lens step on the outer surface of the inner lens to form the outer lens. A fisheye lens step is formed on the inner surface of the inner lens so that the focus of each fisheye lens step of the inner lens is located substantially on the inner surface of the outer lens.

[0008]

[Action]

 Therefore, according to the vehicular lamp of the present invention, the light flux emitted from the light bulb is transmitted as a parallel light flux in the inner lens by the light control means for controlling the light into parallel light, and is substantially eliminated by the fisheye lens step formed on the outer surface of the inner lens. Since the light is focused on each predetermined part on the inner surface of the outer lens, when the vehicle lamp is viewed from the front, the part where the light flux of the outer lens is focused looks more shining, and for vehicles using a light bulb. Although it is a lamp, it can be made to appear as if it were a lamp for a vehicle in which a large number of LED light sources are arranged, which makes it possible to produce a high brightness at a low cost.

[0009]

【Example】

 Hereinafter, the details of the vehicular lamp of the present invention will be described according to each embodiment shown in the accompanying drawings.

In each of the embodiments shown in the drawings, the vehicular lamp of the present invention is applied to a vehicular stop lamp.

1 and 2 show a first embodiment.

A stop lamp 1 for a vehicle is provided with a lamp body 2 having a front opening, an outer lens 3 for covering a front opening of the lamp body 2, and an inner side of the outer lens 3 arranged substantially in parallel therewith. And an inner lens 4 and a light bulb 5 arranged at a predetermined position in the lamp body 2.

The outer lens 3 has a large number of fisheye lens steps 6, 6, ... Formed on its inner surface, and each fisheye lens step 6, 6, ... Is formed in a substantially square shape when viewed from the front. One of the focal points is located substantially on the outer surface of the inner lens 4.

On the inner side surface of the inner lens 4, circular Fresnel lens steps 7, 7, ... Are formed centering on the light bulb 5 when viewed from the front, and among the light flux emitted from the light bulb 5, At this time, the light beam directly incident on the inner lens 4 is controlled to be parallel light which is substantially orthogonal to the inner lens 4.

A large number of fisheye lens steps 8, 8, ... Are formed on the outer surface of the inner lens 4, and each fisheye lens step 8, 8, ... Is formed in a substantially square shape when viewed from the front. The focal length f'is the same as the focal length f of the fish-eye lens steps 6, 6, ... Of the outer lens 3 and is formed to be substantially the same as the distance between the inner lens 4 and the outer lens 3. The light flux, which has been transmitted through the inner lens 4 and has been converted into substantially parallel light, is emitted from the inner lens 4 and is then condensed at predetermined positions on the substantially inner surface of the outer lens 3 which will be described later. .

The radius of curvature R, R'of the fisheye lens steps 6, 6, ... of the outer lens 3 and the fisheye lens steps 8, 8, ... of the inner lens 4 are the same for both the outer lens 3 and the inner lens 4. If it is made of acrylic resin, its refractive index n is 1.5, so that from 1 / f = (n-1) 1 / R, f = 2R and f '= 2R'.

The front shape and formation pitch of the fisheye lens steps 6, 6, ... Of the outer lens 3 and the front shape and formation pitch of the fisheye lens steps 8, 8, ... Of the inner lens 4 are made the same. The optical axis of each fish-eye lens step 6 of the outer lens 3 and the optical axis of each fish-eye lens step 8 of the inner lens 4 are aligned with each other.

Then, when the light bulb 5 is turned on, when the light flux is incident on the inner lens 4, the light flux is made into parallel light which is substantially orthogonal to the inner lens 4 by the Fresnel lens steps 7, 7 ,. When the light is emitted to the front of the inner lens 4, it is condensed by the fish-eye lens steps 8, 8 ,.

The optical axes of the fish-eye lens steps 8, 8, ... Of the inner lens 4 and the fish-eye lens steps 6, 6, ... Of the outer lens 3 coincide with each other, and the fish-eye lens steps 8 , 8, ... are located on the inner surface of the outer lens 3 at the top of each fish-eye lens step 6, 6 ,, so that the light flux emitted from the inner lens 4 is The light is focused on the top of each fish-eye lens step 6, 6, ... Of the inner surface of the lens 3.

Then, the light flux incident on the outer lens 3 passes through the outer lens 3 and is emitted from the front surface thereof to the front at a predetermined diffusion angle.

In this way, the light flux emitted toward the front of the vehicle stop lamp 1 is transmitted through the fish-eye lens steps 8, 8, ... Of the inner lens 4, and the light flux is transmitted to each fish-eye lens step 6 on the outer lens 3 surface. , 6, ... Are focused on the top of the vehicle, so when viewed from the front of the vehicle stop lamp 1, only the central portion of the fisheye lens steps 6, 6 ,. The LED looks like it is shining in the vehicle stop lamp 1 and a high brightness is produced.

FIGS. 3 and 4 show a second embodiment of the vehicular lamp according to the present invention, which is applied to a vehicular stop lamp as in the case of the first embodiment.

The vehicle stop lamp 1A shown in the second embodiment is different from the vehicle stop lamp 1 in the first embodiment in that the size and the inner side of the fisheye lens step of the outer lens are the same as those of the inner step. The size of the lens as seen from the front of the fisheye lens step differs from that of the first embodiment. Therefore, the description of the second embodiment will be made mainly with respect to the difference from the first embodiment, and other parts will be described. The same reference numerals are given to the same or similar parts in the first embodiment, and the description thereof will be omitted.

Reference numeral 9 denotes an outer lens, and fish-eye lens steps 10, 10, ... Are formed on the inner surface thereof as in the vehicle stop lamp 1 of the first embodiment.

Reference numeral 11 denotes an inner lens, and Fresnel lens steps 7, 7, ... Are provided on the inner surface of the inner lens as in the vehicle stop lamp 1 of the first embodiment, and a fisheye lens is provided on the outer surface thereof. Steps 12, 12, ... Are formed respectively.

The fish-eye lens steps 10, 10, ... Of the outer lens 9 and the fish-eye lens steps 12, 12, ... Of the inner lens 11 are each formed in a substantially square shape when viewed from the front, and the outer lens 9 is also formed. The length ratio of one side of each fish-eye lens step 10 to the one side of each fish-eye lens step 12 of the inner lens 11 is formed to be 1: 2, and the fish-eye lens steps 10, 10, ... And the fish-eye lens step 12 are formed. , 12, ... Have the same focal length, and their respective focal points are substantially on the other fisheye lens step 10, 10, ... Surface or on the fisheye lens step 12, 12 ,. It is supposed to be located.

Further, the optical axis of each fish-eye lens step 12 of the inner lens 11 and the optical axis of every other fish-eye lens step 10, 10, ... Of the outer lens 9 are arranged so as to coincide with each other.

Then, when the light bulb 5 is turned on, when the light flux enters the inner lens 11, the Fresnel lens steps 7, 7, ... When the light is emitted to the front of the lens 11, it is condensed by the fisheye lens steps 12, 12 ,.

The optical axes of the fish-eye lens steps 12, 12, ... Of the inner lens 11 and the alternate fish-eye lens steps 10, 10, ... Of the outer lens 9 coincide with each other, and each fish-eye lens step 12 , 12, ... are focused on the tops of the fish-eye lens steps 10, 10, ... which are located every other one of the inner surfaces of the outer lens 9, and thus are emitted from the inner lens 11. The light flux is condensed on the tops of the fisheye lens steps 10, 10, ... Which are located on every other inner surface of the outer lens 9.

Then, the light flux incident on the outer lens 9 passes through the outer lens 9 and is emitted from the front surface thereof to the front at a predetermined diffusion angle.

The light flux emitted toward the front of the vehicular stop lamp 1A in this manner passes through the fish-eye lens steps 12, 12, ... Of the inner lens 11 and is placed on every other fish-eye lens on the outer lens 9 surface. In order to collect light from the top of steps 10, 10, ..., When the vehicle stop lamp 1A is viewed from the front, only the spot condensed on the inner side surface of the outer lens 9 looks brighter, as if it were for a vehicle. The LED looks like it is shining inside the stop lamp 1A, creating a high brightness feeling.

Also, when the vehicle stop lamp 1A is viewed from the front when the light bulb 5 is not lit, it seems that the bright portions and the dark portions are alternately arranged.

That is, the fish-eye lens steps 12, 12, ... Of the inner lens 11 receive and reflect external light, and the reflected light is a light beam that travels in the direction normal to the fish-eye lens steps 12, 12 ,. Strongly (see FIG. 4), therefore, the fisheye lens step 10a of the outer lens 9 whose optical axis coincides with the optical axis of the fisheye lens step 12 of the inner lens 11 shines brightest, and the fisheye lens steps 12 and 12 of the inner lens 11 The fish-eye lens step 10b of the outer lens 9 whose optical axis coincides with the boundary with becomes the darkest, and when the vehicle stop lamp 1A is viewed from the front, the bright and dark parts are alternately arranged. Will appear to be present.

FIGS. 5 and 6 show a third embodiment of the vehicular lamp of the present invention, which is applied to a vehicle stop lamp in the same manner as the first embodiment.

The vehicle stop lamp 1B shown in the third embodiment differs from the vehicle stop lamp 1 in the first embodiment in that the size of the outer lens fisheye lens step and the inner lens fisheye lens step are different. Of the third embodiment. Therefore, the description of the third embodiment will be made mainly on the differences from the first embodiment, and the other parts will be described in the first embodiment. The same reference numerals are given to the same or similar portions, and the description thereof will be omitted.

Reference numeral 13 is an outer lens, and fisheye lens steps 14, 14, ... Are formed on the inner surface thereof, similarly to the vehicle stop lamp 1 of the first embodiment.

Reference numeral 15 denotes an inner lens, and Fresnel lens steps 7, 7, ... Are provided on the inner surface thereof as in the vehicle stop lamp 1 of the first embodiment, and a fisheye lens is provided on the outer surface thereof. Steps 16, 16, ... Are formed respectively.

The fish-eye lens steps 14, 14, ... Of the outer lens 13 and the fish-eye lens steps 16, 16, ... Of the inner lens 15 are each formed in a substantially square shape when viewed from the front, and The length ratio of one side of each fish-eye lens step 14 to one side of each fish-eye lens step 16 of the inner lens 15 is formed to be 4: 5, and the fish-eye lens steps 14, 14, ... And the fish-eye lens steps 16, 16 ,. ···································· s each focal length is substantially the same, and each focal point is located substantially on the other fisheye lens step 14, 14, ... Has been

For example, as shown in FIG. 6, if the focus of one fisheye lens step 14a of the outer lens 13 is located on the optical axis of one fisheye lens step 16a of the inner lens 15, the lower side of the fisheye lens step 14a The focal point of the fisheye lens step 14b adjacent to is located slightly above the optical axis of the fisheye lens step 16b adjacent to the lower side of the fisheye lens step 16a.

The focus of the fisheye lens step 14c adjacent to the lower side of the fisheye lens step 14b (second from the first fisheye lens step 14a) is the fisheye lens step 16c adjacent to the lower side of the fisheye lens step 16b (the first fisheye lens step 14b). It is located near the boundary with the fish-eye lens step 16b at the second position from the step 16a).

The focus of the fish-eye lens step 14d adjacent to the lower side of the fish-eye lens step 14c (the third from the first fish-eye lens step 14a) is the focus of the fish-eye lens step 16d adjacent to the lower side of the fish-eye lens step 16c. It is located near the boundary between the fish-eye lens step 16a and the third step.

The focus of the fisheye lens step 14e (fourth from the first fisheye lens step 14a) adjacent to the lower side of the fisheye lens step 14d is located slightly below the optical axis of the fisheye lens step 16d.

The focus of the fifth fisheye lens step 14f downward from the one fisheye lens step 14a of the outer lens 13 coincides with the optical axis of the fourth fisheye lens step 16e downward of the fisheye lens step 16a of the inner lens 15. .

In this way, the focus of each fish-eye lens step 14, 14, ... Of the outer lens 13 coincides with the optical axis of the fish-eye lens step 16, 16 ,. There are three types: those that are slightly separated upward or downward, and those that are located near the boundary between the fisheye lens step and the fisheye lens step.

Then, when the light bulb 5 is turned on, when the light flux enters the inner lens 15, it is converted into parallel light beams which are substantially orthogonal to the inner lens 15 by the Fresnel lens steps 7, 7 ,. , When it is emitted to the front of the inner lens 15, it is condensed by the fish-eye lens steps 16, 16 ,.

Since the focus of each fish-eye lens step 16, 16, ... Is located at the above-mentioned predetermined position on the inner surface of the outer lens 13, the light flux emitted from the inner lens 15 is substantially the same as that of the outer lens 13. The light is focused on the predetermined position on the inner surface.

Then, the light flux incident on the outer lens 13 passes through the outer lens 13 and is emitted from the front surface thereof to the front at a predetermined diffusion angle.

In this way, the luminous flux emitted to the front of the vehicular stop lamp 1 B is condensed by the luminous flux transmitted through the fish-eye lens steps 16, 16, ... Of the inner lens 15 on the surface of the outer lens 13. Therefore, when this is viewed from the front of the vehicle stop lamp 1B, only the spot where light is condensed on the inner surface of the outer lens 13 looks brighter, and it is as if the LED shines inside the vehicle stop lamp 1B. It looks as if it is present and produces a feeling of high brightness.

When the stop lamp 1B for a vehicle is viewed from the front when the light bulb 5 is not lit, the fisheye lens steps 14, 14, ... Of the outer lens 13 have the brightest or normal brightness. , It looks like three kinds of brightness, the darkest one.

That is, as described above, the optical axis of the fisheye lens step 16 of the inner lens 15 and the fisheye lens step 14 of the outer lens 13 whose optical axis coincides with each other shines brightest, and the fisheye lens steps 16 and 16 of the inner lens 15 Since the fish-eye lens step 14 of the outer lens 13 whose optical axes coincide with each other becomes the darkest, the fish-eye lens step of the inner lens 15 of which the focal point is facing among the fish-eye lens steps 14, 14 ,. The fish-eye lens step 14a that coincides with the optical axes of 16, 16, ... Appears to be the brightest, and the focus of the fish-eye lens steps 14b and 14e, which are slightly deviated from the optical axis of the fish-eye lens step 16, appear to have normal brightness. In addition, the focus is near the boundary between the fisheye lens steps 16 and 16. The positioned fisheye lens steps 14c and 14d appear darkest.

[0051]

[Effect of device]

 As is clear from the above description, the vehicular lamp of the present invention includes a lamp body having a front opening, a light bulb arranged at a predetermined position of the lamp body, and an outer lens covering the front opening of the lamp body. And an inner lens arranged substantially parallel to the outer lens and inside the outer lens, and a light control means for controlling the light transmitted through the inner lens to be parallel light. It is characterized in that a fish-eye lens step is formed, and a fish-eye lens step is formed on the inner surface of the outer lens, and the focus of each fish-eye lens step of the inner lens is located substantially on the inner surface of the outer lens.

Therefore, according to the vehicular lamp of the present invention, the light beam emitted from the light bulb is transmitted as a parallel light beam in the inner lens by the light control means for controlling the light beam to be parallel light, and the fisheye lens formed on the outer surface of the inner lens. Since the light is focused on each predetermined part on the inner surface of the outer lens by the step, when the vehicle lamp is viewed from the front, the part where the light flux of the outer lens is focused looks more shining and the bulb is used. Although it is a vehicular lamp that used to be a vehicular lamp, it can be thought of as if it were a vehicular lamp that has a large number of LED light sources, which makes it possible to produce a high brightness at a low cost. .

In each of the above embodiments, the vehicular lamp of the present invention is applied to the vehicle stop lamp. However, the vehicular lamp of the present invention is not limited to this, and can be applied to, for example, a turn signal lamp for a vehicle. Can also be applied.

Further, in each of the above-mentioned embodiments, the light control means for controlling the light passing through the inner lens into the parallel light is shown by forming the Fresnel lens step on the inner surface of the inner lens on the bulb side. The vehicle lamp is not limited to this, and may be, for example, one that uses a paraboloidal reflector.

Further, the specific structures and shapes shown in the above-mentioned embodiments are merely examples for implementing the vehicle lighting device of the present invention, and the technical scope of the present invention is limited by these. Should not be construed in the open.

[Brief description of drawings]

1 shows a first embodiment in which the vehicular lamp of the present invention is applied to a vehicular stop lamp together with FIG. 2, which is a central longitudinal sectional view of the vehicular stop lamp.

FIG. 2 is an enlarged cross-sectional view of a main part.

FIG. 3 shows a second embodiment in which the vehicular lamp of the present invention is applied to a vehicular stop lamp together with FIG. 4, and this figure is an enlarged cross-sectional view of a main part when a light bulb is lit.

FIG. 4 is an enlarged cross-sectional view of a main part when the light bulb is not lit.

FIG. 5 shows a third embodiment in which the vehicular lamp of the present invention is applied to a vehicular stop lamp together with FIG. 6, and this figure is an enlarged cross-sectional view of a main part when a light bulb is lit.

FIG. 6 is an enlarged cross-sectional view of a main part when the light bulb is not lit.

[Explanation of symbols]

 1 Vehicle lamp 2 Lamp body 3 Outer lens 4 Inner lens 5 Light bulb 6 Fisheye lens step (outer lens) 7 Light control means (Fresnel lens step) 8 Fisheye lens step (inner lens) 9 Outer lens 10 Fisheye lens step (outer lens) 11 Inner Lens 12 Fisheye lens step (inner lens) 13 Outer lens 14 Fisheye lens step (outer lens) 15 Inner lens 16 Fisheye lens step (inner lens)

Claims (1)

[Scope of utility model registration request] 1. A lamp body having a front opening, a light bulb arranged at a predetermined position of the lamp body, an outer lens covering a front opening of the lamp body, and an outer lens which is substantially parallel to the outer lens. An inner lens disposed inside, and a light control means for controlling the light transmitted through the inner lens into parallel light. A fisheye lens step is provided on the outer surface of the inner lens, and a fisheye lens is provided on the inner surface of the outer lens. A vehicle lamp characterized in that each of the steps is formed and the focus of each fish-eye lens step of the inner lens is located substantially on the inner surface of the outer lens.