JPH0223374B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle lamp suitable for application to a high-mounted stop lamp, etc., and in particular, the present invention relates to a vehicle lamp that is suitable for use in a high-mounted stop lamp, etc., and in particular, a lamp body in which some of the components are changed for various types of vehicles. It can be easily installed with just one person, and allows for the common use of the main body of the lamp.

[Conventional technology]

In recent years, with the development of semiconductor technology, high-brightness light-emitting diodes have been developed and can now be obtained at low cost, so they can be installed in vehicle lights, such as brake lights, taillights, and even on the outside (or inside) of the rear of the car body. It is being considered as a light source for lighting equipment commonly known as high-mounted lamps. In addition to the reasons mentioned above, the main reasons for this are that unlike ordinary light bulbs, it does not have a filament, so it has a semi-permanent lifespan, there is no need for replacement because the filament does not break, and there are fewer restrictions on the light fixture itself and its mounting location. This is because it has excellent features such as being able to make the light fixture thinner and easier to install, generates significantly less heat than light bulbs, and can be made smaller.It points to the direction of future light fixtures. I can say that.

[Problem that the invention seeks to solve]

By the way, this type of vehicle lighting is generally manufactured according to the vehicle model and is fixed to a predetermined number of locations, so it may be difficult to install it if the vehicle model is different, resulting in the inconvenience of incompatibility. Ta. In particular, for lighting equipment such as high-mounted lamps that are not required to be installed on the vehicle body, but can be installed according to the user's request,
It is uneconomical to manufacture and store each car model separately.
Furthermore, when a user replaces their car with a different model, it is not possible to remove the lights installed on the old vehicle and install them on the new vehicle, which increases the economic burden. There is a need for a vehicle lamp that can be installed by simply replacing the lamp and that allows the lamp body to be used in common.

[Means for solving problems]

The vehicle lamp according to the present invention was made in response to the above-mentioned demands, and includes a box-shaped first lamp body with open front and rear surfaces, and a box-shaped first lamp body with a front opening of the first lamp body closed. a lens attached to the body, a substrate disposed within the first lamp body, a number of light emitting diodes mounted on the substrate, and a lens mounted on the body such as to close a rear opening of the first lamp body. The light fixture includes a first lamp body attached thereto, and a lamp mounting member detachably attached to the lower surface of the first lamp body and fixed to the vehicle body side.

[Effect]

In the present invention, since the lamp body is attached to the vehicle body via the lamp mounting member, it is only necessary to replace only the lamp mounting member with one suitable for the vehicle model depending on the vehicle type. Can be used commonly for different vehicles.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention applied to a high-mount stop lamp, and FIG. 2 is an exploded perspective view of the same lamp. In these figures, 1 is a rear window of a car, 2 is a high-mounted stop lamp disposed inside the rear window 1, and this lamp 2 has a first lamp body 3 in the shape of an oblong box that opens at the front and rear of the car body. A lens 4 is attached to the first lamp body 3 so as to close the front opening of the first lamp body 3, and a lens 4 is attached to the first lamp body 3 so as to close the rear opening of the first lamp body 3. The second lamp body 5 and the first lamp body 3 are removably attached to the center portion of the lower surface in the left and right direction by a pair of setscrews 6, and a pair of right and left bolts 7A,
7B fixed to the vehicle body (rear tray) 8, a printed circuit board 10 disposed inside the first lamp body 3, a large number of light emitting diodes 11 mounted on the surface of the printed circuit board 10, and It is generally composed of a resistor 12 for diode lighting, etc.
The first and second lamp bodies 3 and 5 constitute a lamp body 13, and the first and second lamp bodies 3 and 5, the lens 4, the printed circuit board 10, the light emitting diode 11, and the diode lighting resistor 12
This constitutes the lamp body 14.

The first lamp body 3 is made of light metal such as aluminum or plastic, and is inclined downward to the left in FIG. 1 so that its front opening end face is parallel to the rear window 1. Therefore, the bottom plate 3A of the first lamp body 3 extends longer forward than the top plate 3B, that is, in the direction of the rear window 1,
The upper surface of the bottom plate 3A in front of the lens 4 is textured to form a rough surface 19. The front opening end of the first lamp body 3 is fixed to the inner surface of the rear window via a gasket 20.

The lens 4 includes a front lens 24 formed in the shape of a shallow box with an open back surface made of translucent plastic or glass colored in a predetermined color, for example, red, and a rear opening of the front lens 24. An inner lens 25 is welded to the lens 24 so as to cover the lens 24, forming a double lens structure, and is fixed inside the first lamp body 3 by welding or the like. On the inner surface of the surface lens 24 is a diffusion lens 2 made up of many small convex lenses.
6 are densely formed. The size of the diffusing lens 26 depends on the moldability of the lens 26 itself, the lens 26
Taking into account light loss at the boundary between the two, surface luminescence due to light diffusion, etc., the width is set to be approximately 0.7 mm to 1.8 mm. If it is less than 0.7 mm, the moldability of the diffuser lens 26 will be extremely poor, and the boundaries between the lenses 26 will increase, resulting in a large loss of light. If it is 1.8mm or more,
The area of the boundary portion that does not have a diffusion function increases, and the surface emitting property of the surface lens 24 decreases.

The inner lens 25 is made of transparent plastic such as acrylic resin, and a large number of condensing lenses 27 are integrally formed on the surface thereof in correspondence with each of the light emitting diodes 11. The condensing lens 27 is formed as a substantially hemispherical spherical lens (fisheye lens), and has a radius of about 2.0 mm to 9.0 mm and a square bottom with sides of about 4.0 mm to 18.0 mm. The reason why one side is 4.0 mm or more is that when a molded light emitting diode 11 with a semiconductor chip protected by an envelope is used, the diode 11
This is to ensure a one-to-one correspondence by making the diameter approximately equal to or larger than the diameter (approximately 4 mm).
If it is 18.0 mm or more, there is a problem in the moldability of the condenser lens 27 itself.

Each of the light emitting diodes 11 is located at a focal point position of the corresponding condenser lens 27 or in front of the focal point position,
That is, it is arranged so as to be located on the inner lens 25 side. Therefore, each light emitting diode 1
When the forward direct light 30 emitted from the inner lens 25 passes through the inner lens 25, it is converted into parallel light rays parallel to the optical axis by the condensing lens 27 corresponding to the diode. In other words, the condenser lens 27 converts the light emitting diode 11 from a point light source to a surface light source. Then, the light 3 from the light emitting diode 11 is made into parallel light by the condensing lens 27.
0 is the diffusion lens 2 when transmitting through the front lens 24.
6, and illuminates the entire surface of the front lens 24 with substantially uniform brightness.

The second lamp body 5 is the first lamp body 3.
The first
It is fixed to the lamp body 3, and has a plurality of elastic engagement pieces 33 integrally protruding from the inner periphery. These elastic engagement pieces 33 engage with engagement portions 34 formed by bending the rear open end of the first lamp body 3 inward from the inside of the lamp body 3. Further, the lower edge of the front opening end of the second lamp body 5 has an engaging portion 35 by bending the entire length or a portion thereof outward, and this engaging portion 35 is formed on the rear surface of the lamp mounting member 9. It engages with the upper end of the wall 36 from the front. A plurality of ventilation holes 38 are formed in the second lamp body 5 in order to effectively dissipate the heat generated by the diode lighting resistor 12 and to minimize the adverse effects of the heat on the light emitting diode 11. .

The printed circuit board 10 is divided into a pair of left and right boards 10A and 10B, and these boards 10A and 10B are electrically connected to each other and are screwed near the opening on the back side of the first lamp body 3. Fixed.

The lamp mounting member 9 is formed into an oblong box shape with an open upper surface, and its bottom plate 39 is positioned and fixed at the center of the lower surface of the first lamp body 3 by a pair of right and left setscrews 6, and the front wall 40 and both sides Surface 41,
The upper end surface of 42 is in contact with the lower surface of the first lamp body 3, and the upper end surface of the rear wall 36 is in contact with the lower surface of the second lamp body 5. The pair of bolts 7A and 7B that pass through the bottom plate 39 are integrally provided on the lamp mounting member 9 by insert molding, caulking, etc., and these bolts 7A and 7B are attached to the vehicle body 8. The lamp mounting member 9 is fixed to the vehicle body 8 by being inserted into a mounting hole (not shown) and screwed onto a nut 45 . Note that the front wall 40, both side walls 41, 4
Positioning protrusions 46 are integrally provided on the upper end surfaces of the first and second lamp bodies 3 and 5, and these protrusions 46 are formed in grooves (see FIG. (not shown).

Here, since the shape of the lamp mounting part of the vehicle body 8 generally differs depending on the vehicle model, the lamp mounting member 9 is
Various types of lamps are manufactured to match the shape of the lamp mounting portion of the vehicle body 8 of each vehicle type, and the lamp fittings suitable for the vehicle type are configured to be attached to the lamp body 14.

This is to allow the lamp body 14 to be used in common for different car models, thereby eliminating the need to manufacture the lamp body 14 for each car type and reducing the number of types of lamp bodies 14. becomes possible. Therefore, mold production is easy, the production line can be integrated into one, and the storage and management of the lamps is also facilitated. Further, since the lamp attachment member 9 is a single component and has a relatively simple structure and shape, it can be manufactured at low cost and does not have a large effect on the overall cost of the lamp.

3 and 4 are a sectional view of a main part and a perspective view of an inner lens and a diode defining member, showing another embodiment of the present invention. In this embodiment, a large number of diffusion lenses 50 made up of small concave lenses are formed closely on the inner surface of the front lens 24, the inner lens 25 and the diode defining member 51 are formed integrally, and the light emitting diode 11 is molded. point,
The substrate 53 is disposed on the back surface of the diode defining member 51 via an insulating film 52, and the light emitting diode 11 is constructed of a non-molded type in which the semiconductor chip is not protected by an envelope. Unlike the above embodiment, the other configurations are generally the same.

The diode defining member 51 is formed into a plate shape of opaque plastic and has a large number of diode housing holes 56 for housing each light emitting diode 11, respectively. Each diode storage hole 56 is open to the front and back surfaces of the diode defining member 51, and the peripheral wall forms a reflective surface 57 having a substantially parabolic surface. Further, the front side opening of the diode storage hole 56 has approximately the same size as the condensing lens 27 of the inner lens 25 and corresponds to the condensing lens 27 .

The substrate 53 is formed into a plate shape of aluminum or the like, and the light emitting diode 11 is disposed on the surface of the substrate 53.
are arranged with an insulating layer 52 in between. The light emitting diodes 11 are connected in series in each column (or row) by a conductive foil 61 and a lead wire 62, and are connected in parallel to a power source. Such connections are exactly the same as in the above embodiments. A large number of fins 63 are integrally provided on the back surface of the substrate 53 to enhance the heat dissipation effect. Note that 64 is interposed between the light emitting diode 11 and the conductive foil 60.
This terminal seat 6 is a roughly dish-shaped terminal seat made of Al, etc.
The inclined peripheral wall side surface 4 forms a reflective surface. 65 is a conductive foil.

Here, the reflective surface 57 of each diode storage hole 56
Since the terminal seat 64 reflects the oblique light emitted from the light emitting diode 11 forward, the surface lens 24 can be illuminated more brightly with less light loss.

5 and 6 show a modification of the embodiment shown in FIGS. 3 and 4, in which each diode housing hole 56 is filled with a translucent resin 70 mixed with a light diffusing agent. This is a molded light emitting diode 11. The diode housing hole 56 is formed into a pyramid shape to match the bottom shape of the condenser lens 27, and its peripheral wall forms a reflective surface 57. Further, a large number of diffusion lenses 26 made of small convex lenses are formed on the inner surface of the front lens 24. The rest of the structure is the same as the embodiment shown in FIGS. 3 and 5.

In such a configuration, the light emitting diode 11
Since the light emitted from the light is diffused in all directions by the light diffusing agent mixed in the translucent resin 70, it has the advantage of enabling illumination with more uniform brightness and improving the illumination effect.

FIG. 7 is a sectional view showing another embodiment of the light emitting diode. The light emitting diode 11 includes a semiconductor chip 80, a transparent resin 81, and a pair of lead wires 82, 8.
3. A molded light emitting diode is formed by using gold wire 84 and the like. The transparent resin 81 is formed into a cylindrical shape using epoxy resin or the like, so that the end surface facing the inner lens 25 forms a flat diffusion surface 85 that diffuses the forward light emitted from the semiconductor chip 80. The semiconductor chip 80 and a pair of lead wires 83, 8 are inside.
3 and gold wire 84 are molded. The semiconductor chip 80 is mounted and fixed on a generally dish-shaped chip mounting portion 87 that is integrally provided at the inner end of one lead wire 82, and is connected to the other lead wire 83 via the gold wire 84. has been done. The chip mounting surface of the chip mounting portion 87 forms a parabolic reflecting surface. A pair of lead wires 82 and 83 are connected to the transparent resin 8
1 to the outside and connected to an electric circuit of a board (not shown).

Of the light emitted from the semiconductor chip 80, light A that faces forward and exits from the diffusion surface 85 of the transparent resin 81 is refracted and diffused by the diffusion surface 85.
Therefore, this light A almost uniformly irradiates the area covering the condensing lens 27 corresponding to the diode on the back surface of the inner lens 25, and when passing through the condensing lens 27, the light A is almost parallel to the optical axis. Turn into a beam of light and head forward. Of the light from the semiconductor chip 80, the light _A2 that is emitted diagonally forward from the peripheral surface of the transparent resin 81 is reflected forward by the reflective surface 57 of the diode housing hole 56 shown in FIGS. 3 and 5. reflected. Therefore, the light does not enter any other condenser lens adjacent to the condenser lens 27 corresponding to the diode.

〔Effect of the invention〕

As described above, the vehicle lamp according to the present invention has
The main body of the light is made into a common part, and it is configured to be attached to the car body via the light mounting member, so when installing it on a different car model, only the light mounting member can be replaced with one that matches that car model. Therefore, the number of types of lighting fixtures can be reduced, manufacturing and parts management are easy, and it can be provided at low cost, and is particularly applicable to lighting fixtures that can be installed according to the user's wishes, such as high-mount stop lamps. It is suitable.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention applied to a high-mount stop lamp, FIG. 2 is an exploded perspective view of the same lamp, and FIGS. 3 and 4 are other embodiments of the present invention. A sectional view of main parts and a perspective view of the inner lens and the diode forming member, 5th
The figure is a sectional view of a main part showing still another embodiment of the present invention, FIG. 6 is a perspective view of a main part of a diode defining member,
FIG. 7 is a sectional view showing another embodiment of the light emitting diode. 1... Rear window, 2... High mount stop lamp, 3... First lamp body, 4... Lens, 5... Second lamp body, 8... Car body, 9...
Light fixture mounting member, 10... Printed circuit board, 11...
Light emitting diode, 13...Lamp body, 14...
Lamp body, 24... Surface lens, 25... Inner lens, 51... Diode defining member, 53...
...Substrate, 80...Semiconductor chip.

Claims (1)

[Claims] 1. A box-shaped first lamp body with open front and rear surfaces, a lens attached to the first lamp body so as to close the front opening of the first lamp body, and
a substrate disposed within the lamp body; a large number of light emitting diodes mounted on the substrate; a second lamp body attached to the first lamp body so as to close the rear opening of the first lamp body; 1. A vehicle lamp comprising: a lamp mounting member which is removably attached to the lower surface of a lamp body and fixed to the vehicle body side.