JPH0451365Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to automobile headlights, and more specifically, the present invention is concerned with the function of a headlamp that emits white light and the function of a fog lamp that emits yellow light in one light chamber. This invention relates to an automobile headlamp that has both functions.

<Prior Art> This type of automobile headlamp is disclosed in Japanese Utility Model Application No. 61-202802, which was previously proposed by the applicant of the present invention. What we proposed earlier was a headlamp that emits white light and a fog lamp that emits yellow light by rotating a globe whose upper half is colorless and transparent and whose lower half is yellow by rotating it half a turn around the bulb. However, when the bulb was turned on, white light and yellow light inevitably mixed together, resulting in a problem in which the functions of the headlamp and fog lamp tended to become unclear from each other. However, in order to prevent white light and yellow light from mixing, using only the upper half of the reflector or the upper half of the bulb can contribute to light distribution. A problem occurs in which the amount of light is halved and the desired light distribution cannot be obtained.

Furthermore, if the yellow globe was located on the outer periphery of the bulb, the presence of the yellow globe would be visible through the front lens when the headlamp was off or when the headlamp was functioning (in white light), resulting in a problem that spoiled the appearance of the headlamp. .

<Problem to be solved by the invention> This invention was made in view of the conventional problems, and it prevents the white light and yellow light from mixing when the bulb is turned on, and improves the function of the headlamp and the fog lamp. It can clearly demonstrate its function, and it can also demonstrate the same light distribution performance as a normal headlamp or fog lamp, and when the headlamp is not lit or when the headlamp function (white light), it can be used to illuminate the yellow globe through the front lens. To provide a headlamp for an automobile that can improve the appearance of the headlamp without making the presence of the headlamp visible.

<Means for solving the problem> The vehicle headlamp of the present invention that achieves the above purpose is:
A cylindrical yellow globe is attached to a globe holder and placed concentrically on the outer circumference of the bulb, and the above globe holder is movably engaged with a guide rail that protrudes from the top surface of the control box along the optical axis direction. At the same time, the globe holder is connected to a movable piece that is screwed and connected to a drive screw installed in parallel with the guide rail in the control box, and the optical axis is moved through the movable piece by forward and reverse rotation of the drive screw. The bulb is movable back and forth along the direction, and is characterized by having a shade installed in front of the bulb that covers most of the yellow globe when the globe holder is closest to the front lens.

<Example> Hereinafter, an example of implementing the present invention will be described based on the drawings.

In the figure, reference numeral 1 denotes a lamp body formed into an approximately oblong rectangular shape from the front. A reflector 2 is installed inside the lamp body to enable free aiming adjustment, and an H4 type halogen bulb with an integrated socket is installed in the rear opening 2a of the reflector 2. 3, and furthermore, a yellow globe 4 is installed on the outer periphery of the bulb 3 so as to be concentric with the bulb 3 and movable back and forth along the optical axis direction, and the front position of the yellow globe 4 is covered with the yellow globe 4. A shade 7 is installed in a fixed position, and a front lens 5 is attached to the front opening of the lamp body 1 to form one lamp chamber 1a.
This constitutes a rectangular headlamp having a square headlight.

The reflecting mirror 2 has a front opening in a generally horizontally long rectangular shape corresponding to the lamp body 1, and its upper wall portion 2b and lower wall portion 2c are formed in a flat shape that does not directly contribute to light distribution. A mechanism, ie, a control unit A, for moving the yellow glove 4 back and forth along the optical axis direction is integrally assembled and installed on the wall portion 2c.

The yellow globe 4 is made of a yellow-colored transparent glass material or resin material, and is formed into a cylindrical shape with a diameter slightly larger than the outer diameter of the bulb 3, and almost the entire glass portion 3b of the bulb 3 except for the shaded portion 3a. It is formed to a length sufficient to cover the valve, is fixedly supported by the glove holder 6 of the control unit A, and is installed on the outer periphery of the valve 3 so as to be concentric with the valve 3. Then, this yellow globe 4 is passed through the globe holder 6 and passed along the longitudinal direction of the bulb 3, that is, along the optical axis direction.
It is made to be freely movable back and forth between a position where the entire glass portion 3b can be completely covered and a position where the glass portion 3b can be completely exposed.

Further, a shade 7 is installed at a position in front of the bulb 3 to cover the outer periphery of the yellow globe 4 when the yellow globe 4 moves forward and approaches the front lens 5 most. The shade 7 is formed in a cylindrical shape with a slightly larger diameter than the outer diameter of the yellow glove 4 and has a closed front, and also has a notch 7a into which the glove holder 6 can enter, and is arranged concentrically with the yellow glove 4. It is fixed to the front end position of the control unit A via the support leg 7b.

The control unit A for moving the yellow glove 4 back and forth includes a glove holder 6 for holding the yellow glove 4 and a mechanism for moving the glove holder 6 back and forth along the optical axis direction, that is, a control box 8. a guide rail 9 protruding from the upper surface along the optical axis direction to hold the glove holder 6 so as to be movable back and forth; and a control box 8.
A drive screw 10 installed in parallel with the guide rail 9, a moving piece 11 that is threadably connected to the drive screw 10 to move the glove holder 6 back and forth, and the drive screw 10. Drive motor 1 for forward and reverse rotation
2, and a switch circuit 13 for controlling the drive motor 12.
It is integrally assembled with screws 15 to the back side edge of a long mounting hole 14 formed in the lower wall 2c. Therefore, the control unit A, except for the glove holder 6, is hidden in the recess 2'c on the back side of the lower wall 2c of the reflecting mirror 2.

The glove holder 6 includes a pedestal part 6a located above the elongated mounting hole 14 of the reflector 2 for mounting and fixing the yellow glove 4, and a pedestal part 6a that extends horizontally from the bottom of the pedestal part 6a to both left and right sides. Reflector 2
The support flange 6 is held between the mouth edge 14a of the elongated mounting hole 14 and the upper surface of the control box 8.
b and 6'b are integrally formed, and also includes a mounting member 6c for fixing the yellow glove 4 to the pedestal portion 6a. A control box 8 is located at the center of the bottom of the pedestal 6a.
An engaging recessed groove 6d that fits and engages with the guide rail 9 protruding from the upper surface is formed in a penetrating shape along the longitudinal direction, and the one support flange 6b is provided with a drive screw in the control box 8. A connecting hole 6e for inserting and connecting the movable piece 11 screwed to the connecting piece 10 is formed. Therefore, this glove holder 6 is not only engaged and held by the guide rail 9 so as to be movable back and forth, but also connected to the elongated hole rim 14a for mounting the reflector 2 via the two support flanges 6b, 6'b. Since it is held in a pinched manner with the top surface of the box 8, there is no risk of it being accidentally shifted or falling off due to external vibrations or the like.

The guide rail 9 is for guiding and supporting the glove holder 6 so that it does not fall onto the upper surface of the control box 8 and is movable back and forth along the optical axis direction. The control box 8 is formed to project along the same or separate body from the control box 8, and its cross-sectional shape is formed into a substantially omega (Ω) shape or a substantially reverse convex shape so as to match the engagement groove 6d of the glove holder 6. It will be done.

The drive screw 10 is arranged inside the control box 8 in parallel with the guide rail 9 and is freely rotatable in forward and reverse directions.A gear 16 is fixed to one end side 10a of the drive screw 10, and the reduction gear 1 is attached to the gear 16.
A pinion gear 18 of a drive motor 12 is meshed and connected via a screw 7, and a moving piece 11 for moving the glove holder 6 back and forth along the optical axis direction is screwed and connected to the drive screw 10 so as to be freely screwable. .

The moving piece 11 has a nut portion 11a which is screwed and connected to the drive screw 10 in a freely threaded manner, and a connecting portion 11b which is inserted and connected into a connecting hole 6e formed in one support flange 6b of the glove holder 6. They are integrally formed and constructed. The connecting portion 11b is connected to a guide elongated hole 19 formed in the control box 8, that is, a drive screw 10.
The guide hole 19 is inserted into and connected to the connection hole 6e of the glove holder 6 by protruding from a guide elongated hole 19 formed directly above the guide hole. At this time,
The size of the connecting hole 6e of the glove holder 6 is made larger than the connecting part 11b of the moving piece 11, so that even if the relative position of the guide rail 9 and the drive screw 10 varies somewhat, the error can be absorbed. To enable smooth movement of a glove holder 6.

Further, the switch circuit 13 for controlling the drive motor 12 to rotate the drive screw 10 in the forward and reverse directions includes a rotating electrode 13a, a fixed electrode 13b, a relay 13c, and a diode 13d, as shown in FIGS. 5 and 6. configured. That is, the rotating electrode 1
3a is the other end side of the drive screw 10 (drive motor 1
10b (on the opposite side to the one end side 10a where 2 are connected)
The wheel gear 21 is attached to the worm gear 21 fixed to the
A fixed electrode 13b (consisting of one common fixed electrode 13'b, a fixed electrode 13''b for forward rotation, and a fixed electrode 13''b for reverse rotation) is integrally attached to the back side of the spur gear 22 meshingly connected through A relay 13c and a diode 13d are assembled onto a single printed circuit board 13e and fixedly installed inside the control box 8. Therefore, in the state shown in FIG. When the operating switch 13f is turned on, the relay 13c is operated and its relay contacts 13'c and 13'c are switched, and the current is transferred from the common fixed electrode 13'b to the rotating electrode 1.
3a → Fixed electrode for forward rotation 13″b → Drive motor 12
As a result, the drive motor 12 and the drive screw 10 rotate in the forward rotation direction, and at the same time, the rotation of the drive screw 10 causes the rotation electrode 13a to be rotated through the spur gear 22.
When the rotating electrode 13a separates from the fixed electrode 13''b for normal rotation (the state indicated by the two-dot chain line in the figure), the current stops and the drive motor 12 and drive screw 10 stop.Then, the operation When switch 13f is turned off, contact 13' of relay 13c
c, 13'c are switched, and the current flows to the common fixed electrode 1.
3'b to rotating electrode 13a → fixed electrode for reversal 13
b → drive motor 12, and the drive motor 12 and drive screw 10 rotate in the reverse direction, and at the same time, the rotating electrode 13a also rotates in the direction of arrow m, and when the rotating electrode 13a separates from the fixed electrode 13b for reverse rotation, the drive motor 12 rotates. The drive screw 10 then stops. At this time, the length (θ) of the forward rotation fixed electrodes 13''b and 13b depends on the longitudinal movement distance L of the globe holder 6, the pitch of the drive screw 10, and the reduction ratio between the worm gear 20, wheel gear 21, and spur gear 22. It is determined accordingly.

Further, a gear 23 is fixed to the other end side 10b of the drive screw 10, and the gear 23 is rotatably installed in the control box 8.
4 is interlocked and connected. The auxiliary gear 24 has two bearings 25 and 26 connected in a fastener-like manner.
26, and one bearing 25 is provided with a groove 27 for engaging the bit of a screwdriver (tool). Therefore, even if the drive motor 12 or the switch circuit 13 is out of order, by engaging the driver in the groove 27 of one of the bearings 25 and rotating the auxiliary gear 24, the power can be restored via the gear 23. By rotating the driving screw 10 in the forward and reverse directions, the position of the glove holder 6, that is, the yellow glove 4 can be freely moved back and forth.

Therefore, as shown in FIG.
If the bulb 3 is turned on while the bulb 3 is advanced through the globe holder 6 to a position where the glass portion 3b of the bulb 3 can be completely exposed, the bulb 3
The light P enters the reflecting mirror 2 as it is, and is irradiated forward as white light by the reflecting mirror 2, so that it functions as a headlamp. Furthermore, if the bulb 3 is turned on with the yellow globe 4 retracted to a position where it can almost completely cover the entire glass portion 3b of the bulb 3, as shown by the two-dot chain line in FIG. The light P passes through the yellow globe 4, is colored yellow, and enters the reflecting mirror 2, and is irradiated forward as yellow light by the reflecting mirror 2, so that it functions as a fog lamp.

<Effects of the invention> Since the automobile headlight of the invention is constructed in this way,
When it is not lit, it looks like a normal headlamp (one headlamp), and when it is lit, it functions as a headlamp (white light) by moving the yellow globe back and forth along the optical axis direction as needed.
However, it is now possible to perform the function of a fog lamp (yellow light), and there is no risk of mixing white light and yellow light when the bulb is turned on, and the functions of a head lamp and a fog lamp can be clearly demonstrated. I can do it.

Moreover, a shade covering the yellow globe is installed in the front position of the valve, so
When looking at the headlight from the front, the existence of the yellow globe and bulb will no longer be visible through the front lens, improving the appearance of the headlight and also eliminating problems with the light distribution of the bulb or yellow globe. As a result, it is possible to prevent problems such as yellow light being emitted during the headlamp function (white light) and white light being emitted during the foglamp function.

Furthermore, the mechanism (control unit) for moving the yellow globe back and forth can be easily miniaturized by unitizing it, eliminating constraints on installation space and design, and eliminating the need for reflectors that do not directly contribute to light distribution. Since it can be installed on the lower wall, it can exhibit the same light distribution performance as a normal headlamp or fog lamp.

In addition, the glove holder of the yellow glove is held movably by a guide rail, and is moved back and forth by the driving screw via a moving piece. It is possible to absorb manufacturing errors in component parts and smoothly move the glove holder back and forth.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

A longitudinal side view showing an example of the implementation of the present invention in FIG.
Figure 2 is a sectional view taken along line 2-2 in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
Figure 4 is an enlarged cross-sectional view taken along the line 3-3 in the figure, Figure 4 is a partially cutaway exploded perspective view illustrating the driving part (control unit A) of the reflector and yellow glove as seen from the rear, and Figure 5 is an exploded perspective view of the yellow glove. Exploded perspective view of the drive part (control unit A), No. 6
The figure is a circuit diagram of a switch circuit. In the figure, 1 is the lamp body, 2 is the reflector, 3 is the bulb, 4
is a yellow glove, 5 is a front lens, 6 is a glove holder, 7 is a shade, 8 is a control box, 9 is a guide rail, 10 is a drive screw, 11 is a moving piece, 12 is a drive motor, and 13 is a switch circuit. .

Claims (1)

[Scope of utility model registration request] A cylindrical yellow globe is attached to a globe holder and placed concentrically on the outer circumference of the bulb, and the above globe holder is movably engaged with a guide rail that protrudes from the top surface of the control box along the optical axis direction. At the same time, the globe holder is connected to a movable piece that is screwed and connected to a drive screw installed in parallel with the guide rail in the control box, and the optical axis is moved through the movable piece by forward and reverse rotation of the drive screw. A headlamp for an automobile, characterized in that the headlamp is movable back and forth along the direction, and a shade is installed in front of the bulb to cover most of the yellow globe when the globe holder is closest to the front lens.