JPH057685Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application>> This invention is applicable to a vehicle lamp having a wraparound part along the rear corner of the vehicle, especially a horizontally long rear combination lamp in which the space between the inner lens and the outer lens is sealed. Regarding vehicle lighting such as.

<<Prior Art>> In order to improve visibility as a vehicle lamp, recent rear combination lamps have become larger in the lateral direction, and many have a shape that wraps around the rear corner of the vehicle.

In addition, in order to make the lamp thinner, instead of using a parabolic mirror that would have a large bulge at the rear, we used an inner lens with a Fresnel prism and an outer lens in front of it. Lens-structured lamps are becoming mainstream.

<<Problem to be solved by the invention>> When the vehicle lamp has a wraparound part along the rear corner of the vehicle and is structured to be attached to the housing with the space between the inner lens and the outer lens sealed. , the following problems occur.

Generally, water vapor contained in the air changes into fine water droplets in the form of mist under certain conditions. One such condition is when warm air comes into contact with a cold surface. Such a phenomenon occurs in a lamp having the structure described above. In other words, when the vehicle is parked in such a condition that the front part of the lamp receives sunlight and the wrap-around part of the lamp is in the shade, the temperature of the space between the lenses sealed by the inner lens and the outer lens is: The temperature will be around 50℃ at the front of the lamp, and around 10℃ at the wraparound area. When such a temperature difference occurs, the air warmed at the front flows to the cooler wrap-around section and comes into contact with the inner lens surface or back surface of the outer lens in that section, and the water vapor contained in that air is released onto that surface. The water cools and turns into fine water droplets, creating a whitish cloudy appearance on the lens surface.

In the space between the lenses at the front of the lamp, the air inside is constantly warmed by sunlight and convection occurs, but since the wraparound area is in the shade, there is no temperature rise that would cause convection. Therefore, warm air from the front part enters the wrap-around part, and cold air from the wrap-around part enters the front part, without causing the effect of uniformizing the temperature of the entire interlens space through continuous convection. , the clouding that occurs on the lens surface of the wrap-around portion is left as is.

An object of this invention is to provide an improved vehicle lamp equipped with a structure that prevents fogging.

<Means for Solving the Problems> The vehicle light according to this invention is a vehicle light that is attached to a housing with a wraparound part along the rear corner of the vehicle and a space between the inner lens and the outer lens is sealed. a reflex reflector mounting recess formed on the surface of the inner lens; and a reflex reflector comprising a plurality of element blocks ultrasonically welded into the reflex reflector mounting recess and at least one element block having a mounting leg cut out. a ventilation hole formed at the bottom of the reflex reflector mounting recess corresponding to the element block in which the mounting leg is not cut out; The reflector has a receiving seat for ultrasonic welding having the same shape and size as the ventilation hole formed at the bottom of the reflector mounting recess.

<<Operation>> The sealed space between the inner lens and the outer lens communicates with the lamp chamber through the ventilation hole provided in the reflex reflector mounting recess of the inner lens and the notch provided in the reflex reflector mounting leg. This makes it possible for air to circulate between the parts, thereby lowering the temperature in the closed space and reducing the temperature difference with the surrounding area, thereby preventing the occurrence of fogging. Furthermore, the receiving seat for ultrasonically welding the reflex reflector into the mounting recess is formed in the same size and shape as the ventilation hole in the mounting recess, so the reflex reflector can be viewed from an angle where its interior can be seen through. However, since the transparent interior is neat and unified in shape, the appearance is less likely to deteriorate.

《Example》 Fig. 1 is a front view of a vehicle lamp showing an embodiment of this invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 is an enlarged - line of Fig. 1. The sectional view, FIG. 4, is a partially exploded perspective view of the lamp shown in FIG. 1.

This lamp is a horizontally long rear combination lamp, with a red tail stop lamp 1 on the top half, an orange turn signal lamp 2 on the outside of the bottom half, and a white backlight lamp 3 on the inside. A molding 5 is attached to each boundary. This lamp is provided with a wrap-around portion 6 along the rear corner of the vehicle on the outer side. This embodiment will be explained below, focusing on a tail stop lamp 1 embodying this idea.

The tail stop lamp 1 includes an outer lens 11 having a leg 11a joined by hot melt 10 to a groove 9 formed at the front opening periphery of a tail stop lamp light chamber 8 formed in a common housing 7, and an inner side of the outer lens 11. placed in
An inner lens 12 held between the outer lens 11 and the shelf 7a of the housing 7, a transparent sheet 13 stuck to the surface of the inner lens 12, and a reflex reflector 14 bonded to the surface of the inner lens 12. , and two lamp bulbs 15 arranged within the lamp chamber 8.

The outer lens 11 is made of red transparent acrylic resin and is injection molded to a thickness of about 3 mm. The inner lens 12 is made of colorless and transparent acrylic resin, and has a flange portion 12a on the periphery excluding the upper side.
It has a fisheye prism 16 on the entire front surface and a Fresnel prism 17 on the entire back surface, and is formed by injection molding to a thickness of about 3 mm. The transparent sheet 13 has a rectangular hole 13a approximately in the center into which the reflex reflector 14 is inserted, and is press-molded into a flat shape from a colorless and transparent polycarbonate resin sheet with a thickness of about 0.5 mm, and has a gradation pattern on its surface. The pattern is printed in black ink. After the surface of the transparent sheet 13 is printed, it is matte printed, that is, matted, using an ink called LOV Mat Clear manufactured by Seiko Advance. This matting treatment may be performed by using other solutions or paints, or by liquid honing.

Such a transparent sheet 13 has an L-shaped hook 13b (see FIG. 4) formed at the end on the wrap-around side of the transparent sheet 13, which is inserted into a locking hole 12b formed in the corresponding portion of the inner lens 12. As the transparent sheet is inserted, both upper and lower edges of the front side of the transparent sheet are linearly ultrasonically welded to beads for ultrasonic welding formed along both upper and lower edges of the front side of the inner lens. Pressure, heat, vibration, etc. during this ultrasonic welding cause distortion in the thin transparent sheet 13, distorting the surface, but since the surface is treated with a matte finish, even if it receives external light, it will not be diffused. The distortion becomes indistinguishable.

Approximately in the center of the surface of the inner lens 12 is a mounting recess for mounting a rectangular reflex reflector 14, as shown in the view from the front side in FIG. 5 and the view from the back side in FIG. 18 are formed. The reflex reflector 14 is
Five element blocks 19 are arranged at equal intervals in two rows, upper and lower, and are connected by connecting parts 20, which are wedge-shaped transparent parts that are one step lower than the element blocks 19. A large number of right triangular pyramidal elements are formed on the back surface of each element block 19, and each connecting portion 2
A fisheye prism 16, which is the same as the surface of the inner lens 12, is formed on the surface of the lens 0.

The reflector 14 is provided with a mounting leg portion 21 on the periphery of its back surface, and this mounting leg portion 21 is cut off at a portion 22 corresponding to the six element blocks 19 in the center excluding the element blocks 19 at both ends. There is. Furthermore, L-shaped beats 23 for ultrasonic welding are formed on the inner periphery of the back surface of the element block 19 at both ends.

On the other hand, the mounting recess 18 of the inner lens 12 to which this reflex reflector 14 is mounted is
It is shaped to a size and depth that allows the mounting leg portion 21 of the reflex reflector 14 to fit therein. Furthermore, the six element blocks 1 at the center of the reflex reflector 14 are located at the bottom of the mounting recess 18.
Six ventilation holes 24 corresponding to the number 9 are formed, and reflex reflectors 14 are formed on the back side of both ends of the ventilation holes 24.
Receiving seats 2 corresponding to the element blocks 19 at both ends of the
5 is formed to protrude by about 1 mm. The ventilation hole 24 and the receiving seat 25 are formed into rectangular shapes of the same size that fit within the effective light emitting area of each element block 19. Although the fisheye prism 16 is not formed on the bottom surface of the mounting recess 18, the surrounding Fresnel prism 16 is formed on the back surface of the mounting recess 18 in a lattice-shaped connecting portion 26 excluding the ventilation hole 24 and the receiving seat 25.
A Fresnel prism 17 that is continuous with the prism 7 is formed.

After bonding the transparent sheet 13 described above to the inner lens 12, align and place the receiving seat 25 of the inner lens 12 on the receiving stand of an ultrasonic welding machine.
Further, insert the reflex reflector 14 into the mounting recess 18 and place it thereon, and use the horn tip of an ultrasonic welding machine to attach the L-shaped bead 2 of the reflex reflector 14.
3 is melted by applying pressure and vibration, and the reflex reflector 14 is bonded to the inner lens 12. At this time, the pressing force of the horn tip is received by the receiving seat 25 protruding from the bottom back surface of the mounting recess 18, so that the Fresnel prism 17 around it is not crushed.

As shown in FIG. 3, the inner lens 12 to which the reflex reflector 14 is welded is supported by the shelf 7a around the front opening of the housing 7, and the outer lens 11 has its legs 11a attached to the housing 7. Groove 9 around the front opening of 7
By sealing with hot melt 10, the outer lens 11 is sandwiched between the outer lens 11 and the housing shelf 7a via the peripheral flange 12a.

Generally, when a reflex reflector is viewed from one side of its right triangular pyramidal element, the inside becomes transparent. In this lamp, when the inside of the reflex reflector 14 is seen through the front outer lens 11, the peripheral edge of the ventilation hole 24 of the reflex reflector mounting recess 18 becomes visible as a black line. There is no such ventilation hole 24, and there is a Fresnel prism 1 at that position that is the same as the surrounding area.
7 is formed, there is no problem even if the inside can be seen through, but if there is a ventilation hole 24 and a Fresnel prism 17 is formed around it, in contrast, the periphery of the ventilation hole 24 becomes transparent. It looks unnecessarily dark and looks bad. However, in this lamp, the receiving seat 25, which has the same size and shape as the ventilation hole 24 and does not have a Fresnel prism formed therein, is formed at equal intervals with the ventilation hole 24, so the rear part of the reflex reflector 14 is the same. It is transparent and looks as if it was purposely designed that way, reducing the deterioration in appearance.

In addition, in such a lamp, the lamp bulb 1
5 lights up, the lattice-shaped connecting portion 26 on the back side of the reflex reflector mounting recess 18 of the inner lens 12
A Fresnel prism 17 is formed on the rear surface of the reflex reflector 14 , and a fisheye prism 16 is formed on a corresponding ridge-shaped connecting portion 20 on the back surface of the reflex reflector 14 .
Each element block 1 of the reflector 14 emits light in substantially the same way as the surface of the reflector 14.
9 floats and simply reflects reflector 14
Not only can it be made larger without sacrificing the light distribution of Tail Stop Lamp 1, but when combined with the upper and lower gradation pattern, it creates a truly stunning light form.

Furthermore, the space 27 between the outer lens 11 and the inner lens 12 is sealed by sealing the leg portion 11a at the periphery of the outer lens 11 into the groove 9 of the housing 7 with the hot melt 10.
Mounting legs 21 on the periphery of the reflex reflector 14
Since a part 22 of the inner lens 12 is cut out and a ventilation hole 24 is formed at the bottom of the reflex reflector mounting recess 18 of the inner lens 12, the inter-lens space 27 and the lamp chamber 8 are connected through the notch 22 and the ventilation hole 24. We will communicate. Furthermore, a boss 29 having a through hole 28 is protruded from the rear part of the housing 7 facing the ventilation hole 24.
Since the grommet 30 is inserted into the grommet 9, the inter-lens space 27 communicates with the outside air via the lamp chamber 8 and the grommet 30. As a result,
Even if the front part of this lamp is exposed to sunlight and the wrap-around part 6 is in the shade, the inter-lens space 2 on the front part side
Inside 7 is a light chamber 8 whose temperature is lower than the air inside.
The inside air is further introduced and cooled, and the temperature difference with the side of the wrap-around portion 6 is reduced, thereby preventing fogging in the wrap-around portion 6.

《Effects of the invention》 As mentioned above, the vehicle lamp according to this invention has the following effects:
A lamp that is attached to a housing with a wrap around part along the rear corner of a vehicle and a space between an inner lens and an outer lens is sealed, and a reflector mounting recess having a ventilation hole is provided on the surface of the inner lens. Since a part of the mounting leg of the reflex reflector that is joined in the mounting recess is cut out, the space between the outer lens and the inner lens communicates with the lamp chamber through the ventilation hole and the cutout, and the space between the lenses is When the air temperature rises, air circulation occurs between the space between the lenses and the lamp chamber, and the air in the space between the lenses is cooled. As a result, the temperature difference with the wrap-around area decreases, and the wrap-around area decreases. It is possible to prevent fogging from occurring in the area. Furthermore, the receiving seat for ultrasonically welding the reflex reflector into the mounting recess is formed in the same size and shape as the ventilation hole in the mounting recess, so the reflex reflector can be viewed from an angle where its interior can be seen through. However, since the transparent interior is neatly unified in shape, the deterioration in appearance can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a vehicle lamp showing an embodiment of the invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line -- in FIG. Fig. 4 is a partially exploded perspective view of the lamp shown in Fig. 1, Fig. 5 is a partially exploded, enlarged perspective view of the inner lens and reflex reflector in the lamp as seen from the surface side, and Fig. 6 is a partially exploded perspective view of the lamp shown in Fig. 1. FIG. 2 is a partially exploded, enlarged perspective view of the reflex reflector as seen from the back side. 6... Wrap around part, 7... Housing, 8...
Lamp room, 9...Groobe, 10...Hotmelt, 11
... Outer lens, 11a ... Leg section, 12 ... Inner lens, 12a ... Flange section, 12b ...
Hook claw, 13... Transparent sheet, 13b... Locking hole, 14... Reflector, 16...
Fisheye prism, 17...Fresnel prism, 19
...Element block, 21...Mounting leg, 22...
Notch part, 24...Vent hole, 25...Socket, 2
7... Space between lenses, 30... Grommet.

Claims (1)

[Scope of utility model registration request] It has a wrap-around part along the rear corner of the vehicle,
The vehicle lamp is mounted on a housing with a space between an inner lens and an outer lens sealed, and the reflex reflector mounting recess formed on the surface of the inner lens is ultrasonically welded into the reflex reflector mounting recess. a reflex reflector comprising a plurality of element blocks in which at least one element block has a notched mounting leg, and the mounting leg is formed at the bottom of the reflex reflector mounting recess corresponding to the notched element block. a ventilation hole, and a receiving seat for ultrasonic welding having the same shape and size as the ventilation hole formed at the bottom of the reflector mounting recess corresponding to another element block in which the mounting leg is not cut out. Vehicle lighting equipment with