JPH0327284Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a vehicle headlight with different functions,
Especially regarding auxiliary headlights.

<<Prior Art>> Examples of headlights provided in vehicles such as automobiles include headlamps, spot lamps, and fog lamps. Head lamps have different light distribution patterns for running beams and passing beams, fog lamps use diffused light, and spot lights use focused light, so the lenses used are also different depending on the purpose. It's different.

By the way, this type of headlamp, for example, those manufactured as fog lamps have only the function of fog lamps, and those manufactured as spot lamps have only the function of spot lamps, so they cannot be affected by changes in the environment, such as clear weather. Even when a fog lamp is needed only temporarily, such as when fog appears while driving with a spot lamp, fog lamps must be provided in addition to the spot lamp.

Therefore, in Utility Model Application Publication No. 57-91642, etc.,
A headlamp has been proposed in which a colored transparent cover is provided on the outside of the front lens so that it can be opened and closed, so that different functions are provided when the transparent cover is closed and when it is opened.

<<Problems to be solved by the invention>> However, in conventional headlamps equipped with an openable outer cover, when the outer cover is open, dirt is generated in three places: the front and back surfaces of the outer cover, and the front lens surface. may occur, which tends to reduce light distribution performance. Particularly when a lens pattern is formed on the back surface of the outer cover, dust, dirt, etc. can get into the recesses and be difficult to remove. Further, when opening and closing the outer cover is controlled by an electric motor, there is a risk that the motor may burn out when the opening/closing function freezes in winter.

Therefore, an object of this invention is to provide a vehicle headlamp with different functions and stable operation.

<Means for Solving the Problems> The vehicle headlight according to this invention includes an outer cover disposed at the front opening of the lamp body holding the lamp bulb, and an openable/closable disposed inside the outer cover. The inner cover includes an inner cover, and a drive device that drives the inner cover to be opened and closed by a motor via arm portions on both sides of the inner cover, and the arm portion of the inner cover is inserted into the drive angle shaft of the drive device. A square hole or a square groove is formed therein, and an elongated slot that reaches the square hole or groove is formed.

<<Function>> By controlling the opening and closing of the inner cover, it is possible to provide two types of functions depending on whether the inner cover is closed or opened. Furthermore, since the inner cover, which can be opened and closed, is placed inside the lamp chamber, there is no risk of dirt from outside. Furthermore, even if the motor overruns, the slot provided in the inner cover deforms the square hole or groove, so the inner cover will not be destroyed.

<<Example>> Hereinafter, an example of this invention will be described with reference to the drawings.

1 to 4 show an embodiment of a vehicle headlamp according to this invention, FIG. 1 is a front view thereof, FIG. 2 is a front view with the outer lens cover removed, 3 is a sectional view taken along the - line in FIG. 1, and FIG. 4 is a sectional view taken along the - line in FIG. 1.

In FIGS. 1 to 4, the headlamp 10 has a reflector 4 made of synthetic resin, which is formed by integrally forming a reflector body 4A and a bag-shaped portion 4B. The reflector main body 4A has a rectangular opening 2 at one end.
The whole body is formed in the shape of a paraboloid of revolution which bulges out backwards, and the light source bulb 1 is disposed inside this paraboloid. In addition, side walls a and b located on the left and right sides of the reflector body 4A and facing each other are the bottom wall e.
The side walls c and d, which are located above and below and face each other, are flat. Reflecting mirror surfaces 3 for reflecting the irradiated light from the light source bulb 1 forward are provided on the inner surfaces of the side walls a, b, c, d and the bottom wall c by vacuum deposition or the like.
The bag-shaped portion 4B, which is integrally formed with the reflector main body 4A, has outer sides 31 and 32 extending in an L-shape from the outer surfaces of the side walls c and d located above and below the reflector main body 4A, respectively, and Outer walls 33 formed to extend rearward from the opening side walls of side walls a and b located on the left and right sides, respectively, in a substantially U-shape,
It becomes 34. This outer wall 31, 32, 33, 34
Adjacent ends are connected in sequence and go around the outside of the opening 2 of the reflector main body 4A, and have an opening 30 on the same plane as the opening 2 of the reflector main body 4A, so that the entire body is located at the rear like the reflector main body 4A. It is set in a bulging shape. On the back side of the reflector 4, spaces 35 are formed between the left and right side walls a, b of the reflector body 4A and the outer walls 33, 34 of the bag-shaped portion 4B, respectively. In addition, on the front side of the reflector 4, the outer walls 31, 32, 33, and 34 forming the bag-shaped portion 4B form the vertical and horizontal contours of the headlight 10, and the outer walls 31, An outer cover 13 is attached to the opening end surfaces of the openings 32, 33, and 34 through an annular rubber gasket 12 in abutment. This outer cover 13 is attached to cover the entire front surface of the reflector 4, is white and transparent, and has a spot condensing prism formed at least in a portion corresponding to the reflector main body 4A. The outer cover 13 and the reflector 4 are fixed to each other via a bracket 47 that is stretched between the outer cover 13 and the reflector 4. This bracket 47 has a U-shaped claw portion 47A at one end and a bent locking portion 47B at the other end. The bracket 47 has a U-shaped claw portion 47 at one end engaged with the locking groove 18 of the outer cover 13, and a bent locking portion 47B at the other end in contact with the slope 19 of the bag-shaped portion 4B. Outer cover 13 and reflector 4 in condition
In this state, the reflector 4
Screw 20 screwed into the side walls 33, 34 of
It is fixed to the reflector 4 via. That is, the bracket 47 fixed to the reflector 4
One end of the U-shaped claw portion 47A is latched and fixed in the locking groove 18 of the outer cover 13.

In this way, the reflector 4 and the outer cover 1
An inner cover 14 located between the outer cover 13 and the reflector main body 4A is disposed inside the reflector 3 formed into a sealed container shape. This inner cover 14 is composed of a first lens half 14A and a second lens half 14B. Each lens half 1
4A and 14B have a lens part 15 having a yellow prism for fogging, and arm parts 16 bent at right angles in the same direction from both sides of the lens part 15, respectively. Each arm portion 16 of one of the first lens half body 14A and the second lens half body 14B has a pair of round shafts 17 fixed to the side wall 34 of the bag-shaped portion 4B located on the right side of the reflector body 4A. are each rotatably supported.
The other arm portion 16 of the first lens half 14A is attached to a corner shaft 8 fixed to the side wall 33 of the bag-shaped portion 4B located on the left side of the reflector body 4A, and a corner formed in the boss portion 14C thereof. The groove 14D is fixed, and the other arm portion 1 of the second lens half 14B
6, a square groove 14F formed in the boss portion 14E is fixed to the output square shaft 24 of the drive device 21 attached to the outer surface of the side wall 33 of the bag-shaped portion 4B. Each arm portion 16 has an elongated slot 14 that communicates with the respective square grooves 14D and 14F.
G, 14H are formed. Further, the rotating end sides of the arm portions 16 of the first lens half 14A and the second lens half 14B are formed with a curved surface, and teeth 16A that mesh with each other are provided on the outer periphery of this curved surface. Therefore, due to the meshing of the teeth 16A,
When one lens half rotates, the other lens half also rotates in opposite directions in conjunction with the rotation.

Also, the second lens half 1 is connected via the output shaft 24.
In the drive device 21 to which 4B is fixed, in addition to a motor (not shown) that can be rotated forward and backward as a drive source,
A reduction gear mechanism (not shown) that transmits the driving force of the motor to the output shaft 24 is integrally incorporated therein. This unitized drive device 21 has a bag-shaped portion 4B.
By effectively utilizing the inside of the back space 35 of the reflector 4, which is inevitably formed by the side wall 33 and the reflector main body 4A, a rubber gasket 40 is attached to the outer surface of the side wall 33 between the back space 35. After that, it is fixed to the side wall 33 using screws (not shown).

The headlight 10 configured in this manner has the function of a spot lamp and a fog lamp by controlling the rotational direction of the motor in the drive device 21 by the driver's operation. The operation of this device will be explained next.

The state shown by the solid line in FIG.
An inner cover 14 is disposed between the light source bulb 1 and the light source bulb 1, and when the driver drives the motor in the drive device 21 in the forward rotation direction in order to function as a fog lamp, the output angular shaft 24 starts to rotate clockwise. Second lens half 1 that rotates together with the output shaft 24
4B rotates in the direction of arrow A. At the same time, the first lens half 14A is also rotated in the direction of the arrow B by the meshing of the teeth 16A, and the first lens half 14A and the second lens half 14B open outward from each other in a double-fold pattern. The first lens half 14A is a space 4 of the bag-shaped portion 4B formed by the side wall d and the outer wall 32.
1, and the second lens half 14B has a side wall c
and the outer wall 31, respectively, and retreat between the spaces 42 of the bag-shaped portion 4B, as shown in FIG.
When the side edges 16I, 16J of each arm part 16 touch the bottoms f, g of the reflector 4, it stops, and the motor in the drive device 21 is turned off by a limit switch (not shown) provided in the drive device 21. It hangs and stops. At this time, if the motor overruns and the output angular shaft 24 attempts to rotate further, the square groove 14F widens due to the slot 14H, allowing the output angular shaft 24 that is about to rotate to escape. The tooth 16A at the tip of the tooth 16A is prevented from being destroyed. The same applies to the other lens half 14A. When the inner cover 14 is retracted from the front surface of the light source bulb 1 in this manner, the light from the light source bulb 1 does not pass through the inner cover 14, so it is focused by the outer cover 13 and functions as a spot lamp.

In order to switch the headlight 10 from functioning as a spot lamp to functioning as a fog lamp again, the driver controls the energization to the motor and reverses it again. That is, when the driver reversely controls the motor, the second lens half 14B also rotates in the opposite direction to the arrow A, and the first lens half 14A also rotates in the opposite direction to the arrow B to remove the bag. Spaces 41, 42 of shaped portion 4B
The first lens half 14A and the second lens half 14 are moved to the position shown in FIG.
B and are closed together. When this state is reached, the motor is de-energized and stopped by a limit switch (not shown) provided in the drive device 21. As a result, the headlamp 10 becomes a headlamp that functions as a fog lamp.

In other words, in the case of this headlamp 10, the driving device 21 is disposed on the back side of the reflector 4 in a back space 35 formed by the side wall 33 forming the bag-shaped portion 4B and the reflector main body 4A. Under the driver's control, this drive device 21 drives the first lens half 1.
By opening and closing the lens 4A and the second lens half 14B, one headlamp 10 has a spot lamp function and a fog lamp function, and these functions can be switched and used.

<<Effects of the invention>> As explained above, according to the vehicle headlight of this invention, by controlling the opening and closing of the inner cover, there are two times when the inner cover is closed and when it is opened.
It can have a seed function. Moreover, the inner cover, which can be opened and closed, is placed inside the lamp chamber, so there is no risk of dirt from outside. Furthermore, even if the motor overruns, the slot provided in the inner cover deforms the square hole or groove in which the drive angle shaft fits, so the inner cover will not be destroyed.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of a vehicle headlamp according to this invention, in which Figure 1 is a front view, Figure 2 is a front view with the outer cover removed, and Figure 3 is a front view of the headlamp. The figure is a sectional view taken along the - line in Figure 1.
The figure is a sectional view taken along the line -- in FIG. 1, and FIG. 5 is a sectional view showing a state in which the inner cover is retracted. 1...Light source bulb, 2...Opening of reflector body, 3...Reflecting mirror surface, 4...Reflector, 4A...
...Reflector body, 4B... Bag-shaped part, 8... Square shaft, 10... Headlight, 13... Outer cover, 1
4... Inner cover, 14A... First lens half, 14B... Second lens half, 14D, 14
F... Square groove, 14G, 14H... Slit, 21
... Drive device, 24 ... Output angle shaft, 30 ... Opening of bag-shaped portion, 35 ... Back space.

Claims (1)

[Scope of utility model registration request] An outer cover disposed at the front opening of the lamp body holding the lamp bulb, an inner cover disposed so as to be openable and closable inside the outer cover, and the inner cover connected to the inner cover via arms on both sides of the inner cover. a drive device that is driven to open and close by a motor; the arm portion of the inner cover is formed with a square hole or a square groove that is inserted into the drive angle shaft of the drive device; A vehicle headlamp characterized by having a long and narrow slot formed therein.