JPH01213902A - Headlight for car - Google Patents

Abstract

PURPOSE:To enhance the reliability and suppress the space for installation of a transmission mechanism by fixing the bases of horns to a driven shaft, which is fixed to a movable reflex mirror and positioned on its rotary shaft, and also to the rotary shaft of the driving part, and by putting the revolving ends of the two horns in junction with each other. CONSTITUTION:A horn 37 is provided to which the base of the driven shaft 22 fixed to a stationary reflex mirror 6 is fixed, while another horn 38 is furnished whose base is fixed to the rotary shaft of the driving part 23. One of their revolving ends is provided with a long hole 44, while the other equipped with a pin 40 which is detained with this long hole 44 slidably. Thus these two horns 37, 38 fixed to the driven shaft 22 of the stationary reflex mirror 6 and the rotary shaft of the driving part are coupled together directly. This reduces the number of components of transmission mechanism and also joints, and accordingly mechanical plays are decreased to lead to enhancement of the reliability. Such a piece of parts as a link bar which requires a great space is not used to contribute to suppression of the installation space.

Description

[Detailed description of the invention] The vehicle headlamp of the present invention will be explained according to the following items.

A. Industrial field of application B9 Summary of the invention C8 Background art [Figure 9] D1 Problem to be solved by the invention [Figure 9] E0 Means for solving the problem F. Examples [Figure 1 Core a, housing, lens [Figures 1 to 4] b, fixed reflector [Figures 1 to 5] C0 movable reflector [Figures 1 to 5] d, drive section [Fig. 1, Fig. 3 to Fig. 8] d-1, Drive section [Fig. 1, Fig. 3 to Fig. 8] d-2, Transmission mechanism [Fig. 4 to Fig. 8] d-3 , Installation of the drive unit [Figures 1, 3 to 6, and 8] 81 Action e-1, Initial adjustment of the orientation of the movable reflector e-2, Rotation of the movable reflector during traveling G0 Effects of the Invention (A. Field of Industrial Application) The present invention relates to a novel vehicle headlamp. Specifically, it is equipped with a fixed reflector and a movable reflector that is rotatably provided with respect to the fixed reflector, and the movable reflector is rotated at the appropriate time to emit light in a desired direction that is not normally irradiated. By improving the connection structure between the drive unit for rotating the movable reflector and the movable reflector in vehicle headlights that can be directed toward the vehicle, mechanical play is reduced and reliability is improved. An object of the present invention is to provide a novel vehicle headlamp that is capable of improving the performance of the vehicle and reducing the space required for a mechanism for rotating a movable reflector.

(B. Summary of the Invention) In the vehicle headlamp of the present invention, the base of the horn is fixed to a driven shaft that is fixed to a movable reflector and located on the rotation axis of the movable reflector, and to the rotation axis of the drive unit. , by linking the rotating ends of the two horns, thereby reducing the number of parts that make up the mechanism on the transmission system from the drive unit to the movable reflector, reducing mechanical play and increasing reliability. In addition to improving the performance, the size of the transmission mechanism is reduced by reducing the number of parts constituting the transmission mechanism, and the space for arranging the transmission mechanism is accordingly reduced.

(C. Background Art) [Figure 9] A vehicle headlamp has been proposed that includes a fixed reflector and a movable reflector that is rotatably provided with respect to the fixed reflector.

This has been proposed, for example, with the intention of having a vehicle headlight that doubles as a fog lamp to illuminate the front of the vehicle and a cornering lamp to illuminate the front side of the vehicle. For example, there is something like the one shown in FIG.

In the figure, a is a vehicle headlamp, b is a generally horizontally elongated box-shaped housing with an open front, and C is a lens attached to the housing b so as to cover the front opening.

A fixed reflecting mirror d is arranged in a lamp space e defined by a housing b and a lens C, and is provided with a reflecting surface f in the shape of a paraboloid of revolution with an optical axis facing forward.

A movable reflector g is rotatably supported by the fixed reflector d, and is also provided with a paraboloid of revolution reflecting surface. Further, i is a driven shaft fixed to the movable reflector g and located on the rotation axis of the movable reflector g, and its upper end portion passes through the upper surface of the fixed reflector d and projects upward.

j is a drive section including a motor, a speed reduction mechanism, a control mechanism, etc., and k is a rotating shaft that is an output shaft of the drive section j.

J2. m is a horn, l has its base end fixed to the driven shaft i, and m has its base end fixed to the rotation axis k.

Reference numeral n designates a link bar, both ends of which are rotatably connected to the rotary ends of the two horns 1 and m, respectively.

Therefore, when the rotation axis k of the drive unit j rotates, the horn m
rotates, which rotates the driven shaft i via the link bar n1 horn 1, and thus the movable reflecting mirror g rotates.

(D. Problem to be Solved by the Invention) [Figure 9] By the way, in the vehicle headlight a described above, the two horns 42 and m are connected by a link bar n. However, since there are many mechanically connected parts, there is a tendency for large mechanical play to occur, resulting in low reliability.

Another problem is that the space occupied by the transmission mechanism from the drive unit j to the movable reflector g is large due to the provision of the link bar n, resulting in an increase in the size of the vehicle headlamp a.

(E. Means for Solving Problems) In order to solve the above-mentioned problems, the vehicle headlight of the present invention has a horn having a fixed base end of a driven shaft fixed to a fixed reflector. A horn whose base end is fixed to the rotary shaft of the drive unit and a long hole at one end of the horn, and a pin that slidably engages with the long hole at the other end. It is.

Therefore, in the vehicle headlamp of the present invention, the driven shaft of the fixed reflector and the two horns fixed to the rotating shaft of the drive unit are directly connected, so that the components of the transmission mechanism and the connecting part are connected directly. This reduces mechanical play and improves reliability. Furthermore, since there are no components that take up a large space such as a link bar, there is an advantage that the installation space can be small.

(F, Example) [Figures 1 to 8] Example 1 below shows details of the vehicle headlamp of the present invention.
Explain according to the following.

(a, Housing, Lens) [FIGS. 1 to 4] 2 is a housing, which has a generally horizontally long rectangular box shape when viewed from the front, and is open at the front. and,
An installation groove 3 that opens forward is formed in the front opening edge of the housing 2 .

Reference numeral 4 denotes a lens, which has a size that covers the front opening of the housing 2, and is integrally formed with a peripheral wall portion 4a that protrudes rearward from its peripheral edge, and the rear end of the peripheral wall portion 4a. The portion 4a' is fitted into the installation groove 3 of the housing 2 and is bonded.

Thereby, a light chamber space 5 defined by the housing 2 and the lens 4 is formed.

(b, Fixed Reflector) [FIGS. 1 to 5 A roller is a fixed reflector placed in the light chamber space 5, and is fixed to the housing 2 by a fixing means (not shown).

The fixed reflecting mirror 6 is positioned above and below the forward-facing reflecting surface 7 in the shape of a paraboloid of revolution, and extends substantially horizontally. It has flat parts 8a and 8b. Furthermore, a mounting hole 9 is formed approximately in the center of the reflective surface 7.

Reference numeral 10 denotes a light bulb mounting ring, which is fixed in the mounting hole 9 provided in the fixed reflecting mirror 6. In addition, the light bulb mounting ring 10
A locking edge 11 bent inward is formed at the front end.

Reference numeral 12 denotes a light bulb with a flange, which is inserted into the light bulb mounting ring 10 from the rear, and when the peripheral edge of the flange 13 abuts against the engagement 11i11 of the light bulb mounting ring 10, it is inserted into the light bulb mounting ring 10 by an installation aid (not shown). The filament 14 is detachably attached, and in this state, the filament 14 is located at the focal point of the reflective surface 7.

15a and 15b are upper and lower flat parts 8a and 8 of the fixed reflecting mirror 6.
This is a bearing hole formed approximately in the center shaft in the left-right direction of b.

(c. Movable reflecting mirror) [FIGS. 1 to 5] Reference numeral 16 is a movable reflecting mirror, and its width when viewed from the front is about one-third that of the fixed reflecting mirror 6. The movable reflecting mirror 16 has a reflecting surface 17 in the shape of a paraboloid of revolution facing substantially in front, and supported pieces 18a and 18b projecting forward from both upper and lower edges.

Further, a horizontally elongated insertion hole 19 is formed in the center of the -reflection surface 17 . The vertical width of the insertion hole 19 is formed to be slightly larger than the outer diameter of the light bulb mounting ring 10.

Reference numeral 20 denotes a support shaft, and a flange 20b projecting laterally from the upper end of a cylindrical shaft portion 20a and a connecting protrusion 20c projecting from the lower end surface of the shaft portion 20a are integrally formed. 20a is the upper plane part 8 of the fixed reflector 6
It is rotatably inserted from above into a bearing hole 15a formed in a. The connecting protrusion 20c is attached to a mounting hole 21 formed approximately at the center of the upper supported piece 18a of the movable reflective file.
a is caulked, whereby the upper end portion of the movable reflecting mirror 16 is rotatably supported by the upper flat portion 8a of the fixed reflecting mirror 6.

22 is a lower support shaft, which serves as a driven shaft. The support shaft 22 includes a flange 22b projecting laterally from the lower end of the cylindrical shaft portion 22a, a prismatic connecting protrusion 22c projecting from the upper end surface of the shaft portion 22a, and a prismatic connecting protrusion 22c projecting from the lower end surface of the shaft portion 22a. A prismatic connecting protrusion 22d is integrally formed.

The shaft portion 22a of the lower support shaft 22 is rotatably inserted from below into a bearing hole 15b formed in the lower plane portion 8b of the fixed reflecting mirror 6, and the connecting protrusion 22c It is caulked into a rectangular attachment hole 21b formed in the lower supported piece 18b.

In this way, the movable reflector it16 is rotatably supported by the fixed reflector 6. The light bulb 12 is inserted into the horizontally elongated insertion hole 19 of the movable reflector 16, and the front end of the light bulb attachment ring 10 is inserted into the insertion hole 19.

Note that a line passing through the centers of the two support shafts 20 and 22 passes through the focus of the reflective surface 17 of the movable reflector 16, and the focus is located on the filament 14 of the light bulb 12.

(d, Drive unit) [Figures 1, 3 to 8 (d-1
, driving section) [Figs. 1, 3 to 8] 23 is a driving section.

Reference numeral 24 denotes a case of the drive unit 23, and a motor and other necessary elements are housed within the case 24.

25 is a motor, 26 is a pinion gear fixed to the rotating shaft of the motor 25, 27 is an output gear for outputting the driving force of the motor 25 to the movable reflector 16, and 28, 29 and 30 are for decelerating the driving force of the motor 25. 31 is a rotation angle detector for detecting the rotation amount or position of the movable reflector 16 by detecting the rotation angle of the output gear 27. Detector 3
The upper end of the first rotor shaft 32 is fixed to the output gear 27.

A rotating shaft 33 projects from the center of the output gear 27, and the rotating shaft 33 projects out of the case 24 through an insertion hole 34 formed on the lower surface of the case 24. A prismatic connecting protrusion 35 is protruded from the lower end surface of the rotating shaft 33, and a screw hole 3 is provided on the lower end surface of the connecting protrusion 35.
6 is formed.

(d-2, Transmission mechanism) [Figures 4 to 8 37 and 3
8 is a horn.

A rectangular attachment hole 39 is formed at the base end of one horn 37, and the connecting protrusion 22d of the support shaft 22 is inserted into the attaching hole 39, and the connecting protrusion 22d protrudes downward from the attachment hole 39. Horn 37
The base end portion of the support shaft 22 is coupled to the support shaft 22 .

Further, an engagement pin 40 is provided at the rotating end of the horn 37 to protrude downward, and an annular engagement groove 40a is formed at the upper end of the engagement pin 40.

A boss portion 41 is integrally formed at the base end portion of the other horn 38 so as to extend vertically through the base end portion. The boss portion 41
A rectangular connecting hole 42 is formed in the upper end surface, and an insertion hole 43 that communicates between the connecting hole 42 and the lower end surface of the boss portion 41 is formed. Also, this horn 38
A long hole 44 extending in the longitudinal direction of the horn 38 is provided at the rotating end of the horn 38.
is formed.

A connecting protrusion 35 provided on the rotating shaft 33 of the drive unit 23 is fitted into the connecting hole 42 of the horn 38, and a screw 45 inserted through the insertion hole 43 from below connects to the connecting protrusion 35.
It is screwed into the screw hole 36 of No.5. This allows the horn 38
A base end portion of the drive unit 23 is coupled to a rotating shaft 33 of the drive unit 23 .

Reference numeral 46 denotes a collar made of a material with good sliding properties, such as nylon, and its inner diameter is equal to the outer diameter of the engagement pin 40 of one horn 37, and the outer diameter is equal to the width of the elongated hole 44 of the other horn 38. , and the collar 46 is made equal to one horn 3.
7, and the collar 46 is slidably engaged with the elongated hole 44 of the other horn 38. Then, a washer 47 is fitted onto a portion of the engagement pin 40 that protrudes downward from the elongated hole 44, and an E-ring 48 is engaged with the engagement groove 40a of the engagement pin 40. The pin 40 is prevented from falling out of the elongated hole 44.

(d-3, Installation of the drive unit) [Figures 1, 3 to 6, and 8] Reference numeral 49 is a bracket for arranging the drive unit 23 in the light chamber space 5, and a metal plate is attached to the bracket. It is formed by punching and bending, and is fixed to the fixed reflecting mirror 6.

Reference numeral 50 denotes a back plate of the bracket, and an arm piece 51 having a substantially crank shape when viewed from above projects forward from the upper edge of the back plate 50.

Reference numeral 52 denotes a support plate protruding forward from the lower edge of the back plate 50, and an abbreviated arm piece 53 protrudes forward from the front end of the left side edge of the support plate 52. . Further, a circular insertion hole 54 is formed in a portion near the front end of the support plate 52, and an arcuate hole 55 located on a circular arc centered on the center of the insertion hole 54 is formed in a portion near the rear end. .

A support arm 56 having a crank shape when viewed from above is provided protruding leftward at a position near the lower end of the left side edge of the back plate 50. An insertion hole 57 is formed at the tip of the support arm 56. Note that 58 is the distance from the base of the support arm 56 to the back plate 5.
Reinforcement rib formed in a protruding shape in the part extending from 0, 59
．． 59, . . . are reinforcing ribs formed in a stamped shape at each bent portion of the support arm 56.

Thus, the bracket 49 is oriented such that the back plate 50 is in contact with the back surface 2a of the housing 2, and the arm pieces 51
is on the upper surface 8a of the fixed reflector 6, and the arm piece 53 is on the upper surface 8a of the fixed reflector 6.
By being fixed to the lower surface 8b of the lamp by spot welding or the like, the lamps are fixedly disposed within the lamp chamber space 5.

60 is the rotating shaft 33 on the lower surface of the case 24 of the drive unit 23.
It is a boss part that protrudes behind the part where 61 is located.
is a support piece protruding from the left side surface of the case 24, and a nut 62 made of synthetic resin is supported on the support piece 61.

Therefore, in a state where the rotation shaft 33 of the drive unit 23 is inserted from above into the insertion hole 54 formed in the support plate 52 of the bracket 49 (of course, such a situation occurs when the horn 38 rotates @
1133. ) A tapping screw 63 inserted from below into the arcuate hole 55 of the support plate 52 is screwed onto the boss portion 60 provided on the case 24 of the drive unit 23, and the tapping screw 63 slides into the arcuate hole 55. Be able to move freely. As a result, the drive unit 23
3, the tapping screw 63 is rotatably supported by the bracket 49 within a range that allows it to move between both ends of the arcuate hole 55.

64 is an adjusting screw, and a spiral portion 65
and a head 66 integrally formed at the rear end of the helical shaft 65.

A thread 67 is formed on the threaded shaft portion 65, and this thread 6
7 is screwed into the nut 62, and the part of the adjusting screw 64 itself near the head is connected to the support arm 56.
It is supported in an insertion hole 57 formed in the hole 57 so as to be rotatable but not to move in the axial direction.

When the adjusting screw 64 is rotated, the distance between the insertion hole 57 and the nut 62 changes, so that the drive section 23 rotates about the rotating shaft 23.

(e, Effect) (e-1, Initial adjustment of the direction of the movable reflector) In the vehicle headlamp 1 described above, the drive unit 23 can be rotated by rotating the adjusting screw 64. can.

Then, when the drive unit 23 rotates, the horn 38 moves to the drive unit 2.
3, the horn 37 is rotated,
This causes the movable reflecting mirror 16 to rotate. Therefore, the orientation of the movable reflecting mirror 16 can be adjusted by rotating the adjusting screw 64, and thereby the orientation of the movable reflecting mirror 16 is initially adjusted.

The adjusting screw 64 may be rotated by inserting a suitable jig such as a screwdriver into the lamp chamber space 5 through a hole 68 formed on the back surface of the housing 2.

(e-2, Rotation of movable reflector while driving) When a steering operation is performed while driving at night, etc., the motor 25 is rotated in a direction corresponding to the steering direction.

When the motor 25 rotates, the rotation is decelerated and transmitted to the output gear 27 via the pinion gear 26 and reduction gears 28, 29, and 30, so that the rotation @ 33 provided integrally with the output gear 27 is reduced. The horn 38 is rotated through the horn 38, and the side edge of the elongated hole 44 of the horn 38 presses the engagement pin 40 of the horn 37, so the horn 37 is also rotated, and this rotation is transmitted to the driven shaft 22, and the horn 38 is rotated. As a result, the movable reflecting mirror 16 is rotated, and the reflected light is irradiated toward the front side of the vehicle body.

Further, when the output gear 27 rotates, the rotor shaft 32 of the rotation angle detector 31 rotates synchronously, and the terminal voltage is applied to the rotor shaft 32.
The rotation angle of the output gear 27 changes to a value corresponding to the rotation angle of the output gear 27, and the rotation angle of the output gear 27 is thereby detected. It is designed to stop when the value is the same as the value selected.

Note that when the movable reflector 16 is rotated in this manner and there is no need for a cornering lamp, the motor 25 is reversed and the terminal voltage of the rotation angle detector 31 is set so that the movable reflector 16 is at the neutral position. The motor 25 stops rotating when the corresponding value is reached, and the movable reflecting mirror 16 is thereby returned to the neutral position.

(G. Effect of the invention) As is clear from the above description, the vehicle headlight of the present invention includes a fixed reflector, a movable reflector rotatably provided with respect to the fixed reflector, and a rotatable reflector. and a driven shaft that is fixed to the movable reflector and located on the rotation axis of the movable reflector, and the base of the horn is fixed to the rotation axis, and one of the two horns is rotated. A pin provided upright at the other rotating end is slidably engaged with a long hole formed at the moving end and extending in the longitudinal direction of the horn.

Therefore, in the vehicle headlamp of the present invention, the driven shaft of the fixed reflector and the two horns fixed to the rotating shaft of the drive unit are directly connected, so that the components of the transmission mechanism and the connecting part are connected directly. This reduces mechanical play and improves reliability. Furthermore, since there are no components that take up a large space such as a link bar, there is an advantage that the installation space can be small.

The above-described embodiments are merely illustrative of the embodiments of the vehicle headlamp of the present invention, and the technical scope of the present invention is not limited thereby.

[Brief explanation of the drawing]

1 to 8 show an example of implementation of the vehicle headlamp of the present invention, FIG. 1 is a partially cutaway plan view, and FIG. 2 is a partially cutaway front view. Figure 3 is a sectional view taken along line III-III in Figure 2, and Figure 4 is a cross-sectional view taken along line III-III in Figure 2.
An enlarged sectional view along the V-IV line, Figure 5 is a bottom view of the main parts,
Fig. 6 is a sectional view of the drive unit, Fig. 7 is an exploded perspective view of the two horns, Fig. 8 is an exploded perspective view of the main parts, and Fig. 9 is a part showing an example of a conventional vehicle headlamp. FIG. Explanation of symbols 1... Vehicle headlight, 6... Fixed reflector, 16... Movable reflector, 22... Driven shaft, 23...
・Drive part, 33... Rotating shaft, 37. 38... Horn, 40... Pin, 44... Long hole Applicant Koito Seisakusho Co., Ltd. 1's inspection 2B) -Wtl1 Part Ichiku t7] Input plan view Fig. 4 1 Vehicle headlight rv, j - Okikirizawa front view 1 Vehicle headlamp 1rr side view < m-m m) Fig. 3 6 Fixed Reflectivity 1S Movable repulsion 22 MIJ axis 23 3738 Small hole 44 Long hole Fig. 5 23 5 [Cross-sectional view of 111 part drive tgJ part Fig. 6 37.38 Hole) 71 No. 2 holes Decomposition charge preview diagram Figure 7

Claims (1)

[Claims] A movable reflector provided with a fixed reflector, a movable reflector rotatably provided with respect to the fixed reflector, and a drive unit having a rotation axis, the drive unit being fixed to the movable reflector and located on the rotation axis of the movable reflector. Fix the base of the horn to the driven shaft and the rotating shaft, respectively, and
A vehicle headlamp characterized in that a long hole formed at one rotating end of two horns and extending in the longitudinal direction of the horn is slidably engaged with a pin provided upright at the other rotating end.