JPH02124338A - Headlight device of car - Google Patents

Abstract

PURPOSE:To enhance the accuracy in adjusting the beam projecting angle by making inclination up and down of a headlight round an inclination shaft movable in the horizontal direction, and preventing deviation in inclination of the headlight in the direction up and down from that in the direction right and left. CONSTITUTION:A headlight unit 2 provided with an electric bulb 5 in a lighting fixture space bordered by a lens 4 and a reflector part 3 includes a mounting ring 32 held with a retaining ring 7 interposed, a rectangular frame 34, and a supported part 35 having a left and a right wall 35b formed in a spherical surface with the frame center situated in its middle. With possibility of inclining, this mounting ring 32 is seated on a slide part 15 of a lamp housing 12 to be fixed to the car body, and adjusting shafts 43, 44 for aiming adjustment up and down and to the left and right are installed at one of the left and right sides and at one of the upper and lower sides between the two members 32, 12. Also a tension spring 46 is installed tightly between these two members 32, 12 in a place apart from the two adjusting shafts 43, 44.

Description

DETAILED DESCRIPTION OF THE INVENTION The automobile headlamp device of the present invention will be explained according to the following items.

A. Industrial field of application B0 Summary of the invention C1 Prior art [Figs. 7 to 9] a. General background An example of a conventional locking type automobile headlamp device [Figs. 7 to '49 [Figure] D1 Problem to be solved by the invention [Figures 7 to 9] E0 Means F for solving the problem F, Example [Figures 1 to 6] a. Headlight unit, retaining ring [Figures 1 to 6] b. Lamp housing, guide member [Figures 1 to 6] C. Leveling drive mechanism [Figures 1, 2, and 6] d. Mounting ring [First Figures to Figures 6] d-1, structure d-2, support and tilting to the lamp housing d-3, headlight unit holding e, operation e-1, aiming adjustment e-2, leveling adjustment e-3 , Movement Accuracy G8 Effects of the Invention (A. Industrial Application) The present invention relates to a novel automobile headlamp device.

Specifically, we will focus on automotive headlight devices that require adjustment of the illumination angle in the vertical and horizontal directions, and in particular, the sliding connection of a lamp housing with a mounting ring having a spherical peripheral surface portion fixed to the vehicle body. The mounting ring is slidably seated on the lamp housing to support the mounting ring so as to be tiltable relative to the lamp housing, and the headlamp is held on the mounting ring, thereby supporting the headlamp so as to be tiltable relative to the vehicle body. This invention relates to an automobile headlamp device that has been designed to achieve this by devising a support structure for the mounting ring to the lamp housing.
The vertical tilting of the headlight is performed using a non-virtual, mechanically existing axis as the tilting axis, so that the illumination angle can be adjusted accurately and quickly. The tilting axis does not interfere with the left and right tilting of the headlights, making it possible to adjust the illumination angle of the headlights quickly and accurately without causing deviations.Furthermore, leveling adjustment is possible. The object of the present invention is to provide a novel automobile headlamp device that does not require the insertion of a special tilting member between the mounting ring and the headlamp even when the headlamp is required.

(B. Summary of the Invention) The automobile headlamp device of the present invention has a mounting ring having a spherical peripheral surface portion that is slidably seated on a sliding contact portion of a lamp housing fixed to a vehicle body. A headlamp device for an automobile, wherein the headlamp is tiltably supported with respect to a lamp housing, and the headlamp is held on the mounting ring, whereby the headlamp is supported tiltably with respect to the vehicle body. An adjustment shaft for left and right aiming adjustment is installed between one side of the mounting ring and the lamp housing, and the other side of the mounting ring is attached to a guide section that projects approximately horizontally from the lamp housing forward. An adjustment shaft for vertical aiming adjustment is installed between the upper or lower part of the mounting ring and the piston rod of the lamp housing or leveling drive mechanism. Tilting in the vertical direction is performed around a tilting axis that is movable in the horizontal direction, so that the headlight can be tilted smoothly in the vertical and horizontal directions without any deviation. The headlight can be tilted and the illumination angle can be adjusted accurately and quickly, and even if leveling adjustment is required, there is no need to insert a special tilting member between the mounting ring and the headlight. It was designed so that it would suffice.

(C, Prior Art) [Figures 7 to 9] (a, General Background) Automobile headlights are generally attached to the vehicle body in a state where initial illumination angle adjustment, that is, so-called aiming adjustment, is possible. In some cases, the device is installed in a state where so-called leveling adjustment is possible to correct deviations in the irradiation angle due to changes in load during use.

Therefore, in such a headlamp device, there are members that define the irradiation angle, such as a headlamp unit, that is, a lamp body and a lens, and a light source disposed in a lamp space defined by these. A headlight unit or a reflector is supported such that it can be tilted vertically and horizontally with respect to the vehicle body or lamp body, and means for tilting the headlamp unit or reflector vertically and horizontally is provided. .

Incidentally, there have been various support structures for the headlamp unit to the vehicle body in a movable unit type automotive headlamp device in which the illumination angle is adjusted by tilting the headlamp unit. One of them is a so-called locking type, in which a mounting ring with a spherical peripheral surface is slidably seated on the sliding contact part of the lamp housing supported by the vehicle body, and the mounting ring is mounted in front of the lamp housing. There is a type of vehicle that has been used for a long time, and has been used for a long time.

(b. An example of a conventional locking type automobile headlamp device) [Figs. 7 to 9] Figs. 7 to 9 show an example of a conventional automobile headlamp device having such a structure. It shows a.

In the same figure, b is the lamp housing fixed to the vehicle body, and the large opening C is approximately oval shaped and long in the left and right direction.
The left and right sides d%d of the opening edge of the opening C (hereinafter referred to as "sliding edges") are formed to extend in a substantially arc shape. e is a mounting ring formed in a frame shape, and left and right sides f, f of the circumferential surface thereof are formed in a spherical shape centered approximately at the center of the mounting ring e,
The spherical part %f is slidably seated on the sliding edge d%d of the lamp housing b, and the lug pieces g provided on one side and the lower side are connected to the lamp housing b. Adjusting screws i, i' for aiming adjustment are installed between the supported nut h1h',
In addition, a tension spring j is stretched between the upper right corner and the lamp housing b, so that the tension spring j is supported so as to be tiltable about the approximate center of the lamp housing b. , when the left adjusting screw i is pushed in or untwisted (with respect to the nut h), the housing is tilted approximately to the left and right as the distance between the left side and the lamp housing b is changed, and ,
When the lower adjusting screw i' is screwed into or unscrewed from the nut h', the distance between the lower part and the lamp housing b is changed, so that it is tilted downward on the road.

K is a headlamp unit, the flange portion 1 of which is held between a sub-mounting ring m and a retaining ring n, and the sub-mounting ring m has its upper end portions on both left and right sides at tilting fulcrum portions 0. The piston rod q of the remote control terminal p of the leveling drive mechanism is connected to the lower side of the mounting ring e.

Therefore, when the mounting ring e is tilted, the headlight r consisting of the ml illumination unit, the sub-mounting ring m, and the retaining ring n is tilted integrally with the mounting ring e, so that the left Asia When the sting screw i is operated, the headlight r is tilted approximately left and right, and the irradiation angle is adjusted approximately horizontally, and when the lower adjusting screw i' is operated, the headlight r is tilted approximately left and right. r is tilted in the direction below the road, and the irradiation angle is adjusted in the direction below the road. Furthermore, when the piston rod q moves, the lower part of the sub-mounting ring m is displaced in the front-back direction with respect to the mounting ring e, so the headlight r is tilted in the vertical direction about the tilting fulcrum part 0.0. , This allows leveling adjustment of the irradiation angle.

(D. Problem to be solved by the invention) [Figures 7 to 9
[Figure] In such an automobile headlamp device a, the center of vertical tilting of the headlamp r is a horizontal line H- passing through the point where the mounting ring e is rotatably supported by the left adjusting screw i. Ideally, the center of tilting in the left and right direction should be a vertical line v-■ passing through the point where the mounting ring e is rotatably supported by the lower adjusting screw i'. Since the upper right corner of the mounting ring e is attracted to the lamp housing b by the tension spring j, the tilting axis of the headlight r becomes an axis tilted towards the direction being tensioned by the tension spring j, and therefore the illumination angle can be adjusted. There is a problem in that it is difficult to perform this accurately and quickly, and furthermore, since the tilting axis moves during the tilting of the headlight r, there is a problem in that the tilting of the headlight r is not smooth.

Furthermore, in the conventional automobile headlamp device a, in order to enable leveling adjustment in addition to aiming adjustment, the headlamp unit is held on the mounting ring e via the sub-mounting ring m. Because we are doing
Various parts such as this sub-mounting ring m and parts constituting the tilting fulcrum 0.0 are required for leveling adjustment. Therefore, the number of parts of the automobile headlamp device a becomes extremely large, and assembly is labor-intensive. There is also the problem that it takes a long time and becomes expensive.

(E. Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the automobile headlamp device of the present invention has a mounting ring rotatably mounted on the lamp housing, and a lamp housing. An adjustment shaft for left and right aiming adjustment is installed between the lamp housing, a support shaft is provided protruding from the other side of the mounting ring, and a guide section with a guide groove extending approximately in the front-rear direction is directed forward from the lamp housing. The tip of the support shaft is supported in the guide groove so as to be slidable and rotatable in the direction around the axis, and the upper or lower part of the mounting ring and the lamp housing or leveling drive mechanism are connected to each other. An adjustment shaft for vertical aiming adjustment is installed between the piston rod of
A tension spring is provided between the lamp housing and a position of the mounting ring that is spaced apart from the two adjustment shafts.

Therefore, according to the automobile headlamp device of the present invention, the tilting axis, which is the center when the headlamp tilts in the vertical direction, is located at a point where one side of the mounting ring is supported by the adjustment shaft for adjusting left and right aiming. The tip of the support shaft is an axis that connects the point where the tip of the support shaft is supported by the guide part, that is, it is an axis that exists mechanically, not virtually. Also, when the headlight tilts in the left and right direction, the center of tilt of the headlight A certain tilting axis is a substantially perpendicular line connecting the position where the upper or lower part of the mounting ring is supported by the adjustment shaft for vertical aiming adjustment and the center of rotation of the mounting ring with respect to the lamp housing; in this case,
Regardless of the horizontal tilt of the headlight or mounting ring, the vertical position of both ends of the vertical tilt axis is fixed, so its horizontality is always maintained constant. Since the horizontality of the tilting axis in this direction remains unchanged, there is no room for tilting in the left-right direction. Therefore, the headlight tilts only in the vertical and horizontal directions and does not tilt in any direction other than these directions, so there is no deviation in the tilting.
As a result, the illumination angle of the headlight can be adjusted accurately and quickly, and the movement can be made very smoothly. Furthermore, if an adjustment shaft for vertical aiming adjustment is installed between the mounting ring and the piston rod of the leveling drive mechanism, the piston rod moves 8 times to tilt the headlight around the tilt axis in the vertical direction. Therefore, the sub-mounting ring conventionally used to enable leveling adjustment and the tilting fulcrum mechanism for tiltably supporting the sub-mounting ring on the mounting ring can be omitted. Therefore, the number of parts of this type of automobile headlamp device can be significantly reduced.

(F. Embodiment) [FIGS. 1 to 6] Details of the automobile headlamp device of the present invention will be described below according to the illustrated embodiment.

In the illustrated embodiment, the automobile headlamp device of the present invention is applied to an automobile headlamp device 1 which is capable of not only aiming adjustment but also leveling adjustment.

(a, headlight unit, retaining ring) [1st
6] 2 is a headlamp unit.

The headlamp unit 2 is defined by a reflector part 3 having a recess with an open front surface, a lens 4 attached to the reflector part 3 so as to cover the front opening part, and the reflector part 3 and the lens 4. The inner surface (not shown) of the reflector part 3 is formed into a reflective surface, and the light bulb 5 has a base part 5a (see FIG. 4).
is supported at the rear top portion of the reflector portion 3.

Such a headlamp unit 2 has a substantially rectangular shape that is long in the left-right direction when viewed from the front, and a mounting flange 6 that projects outward is formed at the joint between the reflector portion 3 and the lens 4. has been done.

Reference numeral 7 designates a glue retaining ring for holding the above-described headlamp unit 2 in cooperation with a mounting ring to be described later, and is a frame-shaped retaining ring having approximately the same external size as the mounting flange 6 of the headlamp unit 2. The main portion 8, the locking edge 9 protruding inward from the front edge of the main portion 8, and the mounting ears 10 protruding from positions near both left and right ends of the upper and lower rear edges of the main portion 8.
．． 10, . . . are integrally formed from a metal plate, and the mounting ears 10.10, . . . have insertion holes 10a, 10a, .
... (see Figure 3) is formed.

(b, lamp housing, guide member) [Figs. 1 to 6] Reference numeral 11 designates a vehicle body, and 12 designates a lamp housing fixed to the vehicle body 11.

The lamp housing 12 has an outer shape that is approximately one size larger than the outer shape of the headlamp unit 2 when viewed from the front. Front part 1 protruding outward from the edge
4 are integrally formed, and the left and right parts 15.15 (hereinafter referred to as "
It is called ``suri-join''. ) is formed so as to extend in an arc shape centered approximately at the center of the lamp housing 12.

A rectangular nut attachment hole 16 is formed near the upper end of the left side 14a of the front side 14, and two attachment holes 17 and 17 are formed approximately in the center of the right side 14b.
A spring hook hole 18 is formed at each lower end.

Reference numeral 19 denotes a guide member for supporting a support shaft protruding from a mounting ring, which will be described later.

The guide member 19 is made of a material with good sliding properties, such as a nylon composite, and the guide part 20 has a prismatic shape long in the front-rear direction and the mounting pieces 21 and 21 protrude vertically from the rear end of the guide part 20. A guide groove 22 is integrally formed of resin and extends in a gentle arc shape along the longitudinal direction of the left side surface 20a of the guide part 20. The cross-sectional shape of the guide groove 22 perpendicular to the longitudinal direction is Its substantially right half 22a is shaped like a circular keyhole, and its front end reaches the front surface of the guide portion 20.

The guide member 19 has a mounting piece 21.
Through hole 21a121a formed in 21 (see Figure 3)
The screws 23a, 23a inserted through the lamp housing 1
The nut 23b is inserted through the mounting hole 17.17 formed in the front part 14 of the lamp housing 12 and
.

23b is fastened, so that it projects approximately horizontally from the right side portion 14b of the front surface portion 14 toward the front.

(C, Leveling Drive Mechanism) [FIGS. 1, 2, 6] 24 is a remote control terminal (shown only in FIG. 6) of the leveling drive mechanism, and is connected to the frame-shaped main body of the lamp housing 12. It is attached to a bracket 25 that projects rearward from the upper end of the section 13.

Reference numeral 26 denotes a piston rod of the remote control terminal 24, and the piston rod 26 is moved in the longitudinal direction in accordance with a detection signal from a sensor that detects sinking of the vehicle body or in accordance with a signal from a command switch provided at the driver's seat.

Note that the remote control terminal 24 has its piston rod 26 located at a slightly higher position than the upper surface of the frame-shaped main part 13 of the lamp housing 12, and when viewed from the front, the piston rod 26
The sliding contact edge 15. is provided directly above the center of the arc of 15.

Reference numeral 27 denotes a slider, which is composed of a connecting metal fitting 28 having an abbreviated shape when viewed from the side, and a sliding member 29 fixed to the lower surface of the connecting metal fitting 28 and made of a material with good sliding properties.
The lamp housing 12 is supported by a guide portion (not shown) provided approximately at the center of the upper surface of the frame-shaped main portion 13 so as to be movable in the front-rear direction.

A connecting shaft 30 projects rearward from the lower part of the vertical portion 28a of the connecting fitting 28, and the rear end of the connecting shaft 30 is connected to the front end of the piston rod 26.

A rectangular nut mounting hole 31 (see FIG. 6) is formed in the vertical portion 28a of the connecting fitting 28 at a position directly above the connecting shaft 30.

Thus, when the piston rod 26 moves, the slider 27 is moved in the front-rear direction.

(d. Mounting ring) [Figs. 1 to 6] Reference numeral 32 denotes a mounting ring that holds the headlamp unit 2 described above.

(d-1, Structure) Reference numeral 33 is the main part of the mounting ring 32, which includes a frame portion 34 having a substantially rectangular frame shape long in the left and right direction and having an outer shape slightly smaller than the outer shape of the mounting flange 6 of the headlamp unit 2. It consists of an annular supported part 35 that protrudes rearward from the rear edge of the frame part 34, and the supported part 35 has upper and lower walls 35a, 35a continuous with both upper and lower walls of the frame part 34. It is formed into a substantially flat plate shape, and the left and right wall portions 35b, 35b are formed into a spherical shape centered approximately at the center of the frame portion 34, as can be clearly seen in FIG.

Reference numeral 36 denotes a front portion projecting outward from the front edge of the frame portion 34, and mounting ears 37, 37, . . . A connecting ear piece 38.3 is provided protruding toward the front side edge 36c and a connecting ear piece 38.3 from the approximate center of the left side edge 36c and the center of the upper side edge 36a.
9 are provided to protrude outward, respectively, and one end of these connecting tabs 3B and 39 is connected to the connecting tabs 38 and 39.
Cut grooves 38a, 39a are formed that reach the tip edges of the grooves 38a, 39a, and the regions where the grooves 38a, 39a are formed are curved rearward into a spherical shape.

Reference numeral 40 denotes a spring hanging hole formed in the lower right corner of the front part 36, and 41, 41, . .

42 projects approximately horizontally toward the right from approximately the center of the right side portion 34a of the frame portion 34, that is, from a position corresponding to the cut groove 38a of the left connecting lug 38 provided on the front portion 36. It is a support shaft, and is formed integrally with a cylindrical shaft portion 42a, a welded portion 42b located at one end of the shaft portion 42a, and a sphere 42c located at the other end of the shaft portion 42a.
is welded to the right side portion 34a of the frame portion 34.

(d-2, Supporting and tilting the lamp housing) The outer surfaces of the left and right wall portions 35b135b of the supported portion 35 of the mounting ring 32 can freely slide on the sliding contact a15.15 of the lamp housing 12. The lamp housing 1
2, and one portion is connected to the slider 27. - That is, 43.44 is an adjusting screw for adjusting aiming, and its head 43a.

Engagement grooves 43b and 44b are formed at the end on the 44a side, and approximately half 43C144c on the side opposite to the head 43a and 44a is formed into a helical shaft. In addition, 45.45' is a nut made of synthetic resin (see Figures 4 and 6), and these nuts 4
5.45' is attached to the nut attachment hole 16 formed in the lamp housing 12, and the other nut 45' is attached to the nut attachment hole 31 formed in the connecting fitting 28 of the slider 27. has been done. And adjusting screw 43.444t its engagement groove 43b,
44b is rotatably engaged with the grooves 38a, 39a formed in the projections 38.39 of the mounting ring 32, and the screw shaft portions 43c, 44c are engaged with the nuts 45.4.
5' are screwed together separately. Furthermore, both ends of the tension spring 46 are individually engaged with the spring hook hole 40 of the mounting ring 32 and the spring hook hole 18 of the lamp housing 12,
Further, the spherical body 42c of the support shaft 42 is supported by the portion 22a having a circular cross section of the guide groove 22 of the guide member 19 so as to be slidable and rotatable in the direction around the axis.

Thus, the mounting ring 32 is supported by the guide member 19 protruding from the lamp housing 12 via the support shaft 42 at the substantially central portion of the right side thereof, and is movably supported by the guide member 19 protruding from the lamp housing 12 via the support shaft 42, and at the same time The substantially central portion is connected to the lamp housing 12 via an adjusting screw 43 so that the distance therebetween can be adjusted, and the central portion of the upper portion is connected to the remote control terminal 24 via an adjusting screw 44 and a slider 27. The piston rod 26 is connected to the piston rod 26 so that the distance between the piston rod 26 and the piston rod 26 can be adjusted, and furthermore, a portion apart from the two positions where these connections are made is always directed toward the lamp housing 12 side by a tension spring 46. Because it is pulled, the supported part 35
The spherical peripheral surface portions 35b, 35b are slidably abutted against the sliding edge 15.15 of the lamp housing 12, and are supported so as to be tiltable in the horizontal and vertical directions with respect to the lamp housing 12.

That is, when the left adjusting screw 43 is pulled in or returned to the nut 45, the distance between the left side of the mounting ring 32 and the lamp housing 12 is changed.
The upper connecting lug 39 is connected to the adjusting screw 4.
4 and the center of the spherical circumferential surfaces 35b, 35b of the mounting ring 32 and extending downward on the road (see FIG. 1) is the tilting axis. When the upper adjusting screw 44 is screwed in or screwed back into the nut 45', the distance between the upper part of the mounting ring 32 and the slider 27 is changed.
The mounting ring 32 has a shaft 47 that connects the position where the left connecting lug 38 is rotatably engaged with the adjusting screw 43 and the position where the sphere 42c of the support shaft 42 is supported by the guide groove 22 of the guide member 19. When the piston rod 26 of the remote control terminal 24 further moves, the slider 2
7 and the adjusting screw 44 are moved in the front-rear direction, the connecting lug 39 is displaced in the front-rear direction, whereby the mounting ring 32 is tilted in the up-down direction about the tilting shaft 47.

Note that when the mounting ring 32 is tilted in the left-right direction, the sphere 42c of the support shaft 42 slides approximately in the front-rear direction with respect to the guide groove 22, and when the mounting ring 32 is tilted in the vertical direction, the support shaft 42c is rotated around the axis.

(d-3, Holding of Headlamp Unit) The headlamp unit 2 is held by such a mounting ring 32.

That is, the front part 36 of the mounting ring 32 is brought into contact with the mounting flange 6 of the headlamp unit 2 from behind, and the locking edge 9 of the retaining ring 7 is brought into contact with the mounting flange 6 from the front. The screws 48, 48, which are inserted through the insertion holes 10a, 10a, . . . formed in the mounting ears 10, 10, .
... is the mounting ear piece 37.3 of the mounting ring 32
7,... are formed in the screw holes 37a, 37a,...(
(see FIG. 3), whereby the headlamp unit 2 is held in a pinched manner by the mounting ring 32 and the retaining ring 7.

(e. Operation) Therefore, the aiming adjustment and leveling adjustment of the headlamp unit 2 by the automobile headlamp device 1 configured as described above are performed as follows.

(e-1, Aiming Adjustment) Aiming adjustment of the irradiation angle of the headlamp unit 2 is performed by operating the adjusting screw 43 or 44 as described above.

That is, the headlamp unit 2 is held so as to be tilted integrally with the mounting ring 32, and in this case, when the left adjusting screw 43 is inserted or unscrewed into the nut 45, Since the mounting ring 32 is tilted in the left-right direction with the vertical line V-V as the tilting axis, the headlamp unit 2 is also legally tilted as shown by the two-dot chain line in FIG. 4, for example. , whereby the irradiation angle of the headlamp unit 2 is adjusted in the left and right directions. Also, adjust the upper adjusting screw 4.
4 is screwed into the nut 45' and then unscrewed, the mounting ring 32 aligns with the tilting shaft 47.
Since the headlamp unit 2 is tilted vertically with the center as the center, the headlamp unit 2 is also legally tilted, for example, as shown by the two-dot line in FIG. The irradiation angle is adjusted in the vertical direction.

(e-2, Leveling Adjustment) Leveling adjustment of the irradiation angle of the headlamp unit 2 is performed by moving the piston rod 26 of the remote control terminal 24.

That is, when the piston rod 26 moves, the slider 2 connected to the piston rod 26 via the connecting shaft 30 moves.
7 and the adjusting screw 44 screwed into the nut 45' supported by the slider 27 are integrally moved in the front-rear direction.
2 is displaced approximately in the front-rear direction, and as a result, the mounting ring 32 and the headlight unit 2 are integrally tilted in the vertical direction about the tilting shaft 47, thereby changing the illumination angle of the headlight unit 2. is adjusted vertically.

(e-3, Accuracy of Movement) In this way, the tilting axis of the headlight Enit 2 in the vertical direction is a non-virtual mechanical axis, that is, the protrusion 38 on the left side of the mounting ring 32 is connected to the adjusting screw. 4
A horizontal shaft 47 connects the position where the support shaft 42 is rotatably supported by the guide member 19 and the position where the support shaft 42 is supported by the guide member 19
The horizontality of the tilting shaft 47 is mechanically maintained constant regardless of whether the mounting ring 32 and the headlamp unit 2 are tilted in the left-right direction. Further, since the horizontality of the tilting shaft 47 in the vertical direction is maintained constant in this way, there is no room for the tilting axis V-V in the left-right direction to be tilted in the left-right direction.

Therefore, since the headlamp unit 2 is tilted only in the vertical and horizontal directions and does not tilt in any direction other than these directions, there is no deviation in the tilting.
Therefore, the irradiation angle can be adjusted accurately and quickly.

(G. Effects of the Invention) As is clear from the above description, the automobile headlamp device of the present invention has a lamp fixed to the vehicle body using the spherical peripheral surface of the mounting ring that holds the headlamp. The mounting ring is slidably seated on the sliding contact part of the housing to support the mounting ring so as to be tiltable relative to the lamp housing, and an adjustment shaft for left and right aiming adjustment is installed between one side of the mounting ring and the lamp housing. A support shaft is provided protruding from the other side of the mounting ring, and a guide portion in which a guide groove extending approximately in the front-back direction is formed is provided approximately horizontally protruding forward from the lamp housing, and the support shaft is provided in the guide groove. The tip of the shaft is supported slidably and freely rotatable around the axis, and an adjustment shaft for vertical aiming adjustment is provided between the upper or lower part of the mounting ring and the lamp housing or the piston rod of the leveling drive mechanism. A tension spring is provided between the lamp housing and a position of the mounting ring that is spaced apart from the two adjusting shafts.

Therefore, according to the automobile headlamp device of the present invention, the tilting axis, which is the center when the headlamp tilts in the vertical direction, is located at a point where one side of the mounting ring is supported by the adjustment shaft for adjusting left and right aiming. This is the axis that connects the point where the tip of the support shaft is supported by the guide part, that is, it is an axis that exists mechanically rather than virtually, and is also the center of tilt when the headlight tilts in the left and right direction. A certain tilting axis is a substantially perpendicular line connecting the position where the upper or lower part of the mounting ring is supported by the adjustment shaft for vertical aiming adjustment and the center of rotation of the mounting ring with respect to the lamp housing; in this case,
Regardless of whether the headlight or mounting ring tilts in the horizontal direction, the vertical position of both ends of the vertical tilting axis is fixed, so its horizontality is always maintained constant. Since the horizontality of the tilting axis in this direction remains unchanged, there is no room for tilting in the left-right direction. Therefore, the headlight tilts only in the vertical and horizontal directions and does not tilt in any direction other than these directions, so there is no deviation in the tilting.
Thereby, the illumination angle of the headlight can be adjusted accurately and quickly, and its movement is always smooth.

Furthermore, if an adjustment shaft for vertical aiming adjustment is installed between the mounting ring and the piston rod of the leveling drive mechanism, the movement of the piston rod will cause the headlight to move up and down around the tilting axis in the vertical direction. Therefore, the sub-mounting ring conventionally used to enable leveling adjustment and the tilting fulcrum mechanism for tiltably supporting the sub-mounting ring on the mounting ring can be omitted. As a result, the number of parts for this type of automobile headlamp device can be significantly reduced.

In the above embodiments, the automobile headlamp device of the present invention is applied to an automobile headlight device that performs leveling adjustment in addition to aiming adjustment, but the automobile headlamp device of the present invention can also be applied to automobile headlight devices that perform only aiming adjustment. In this case, an adjustment shaft for vertical aiming adjustment is installed between the upper or lower part of the mounting ring and the lamp housing. Good.

Further, in the above embodiment, a sphere was provided at the tip of the support shaft, and this sphere was supported so as to be slidable in the guide groove of the guide portion and rotatable in the direction around the axis. The support structure for the shaft guide groove is not limited to this type of structure.

[Brief explanation of drawings]

1 to 6 show an example of implementation of the automobile headlamp device of the present invention, in which FIG. 1 is a front view, FIG. 2 is a perspective view, FIG. 3 is an exploded perspective view, and FIG. The diagram is IV-I in Figure 1.
5 is a sectional view taken along line V-V in FIG. 1, FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 1,
Figures 7 to 9 show an example of a conventional automobile headlamp device. Figure 7 is a front view, and Figure 8 is a front view of Figure 7.
9 is a sectional view taken along line IX-IX in FIG. 7. Explanation of symbols 1... Automobile headlamp device, 2... Headlamp, 11... Vehicle body, 12... Lamp housing, 15... Sliding contact part, 19... Guide part, 22...
-Guide groove, 24...Leveling drive mechanism, 26...Piston rod, 32...Mounting ring, 34a...Other side (of the mounting ring), 35b...Spherical shape (of the mounting ring) 38... (Mounting ring) - side part, 39... (Mounting ring) upper side part, 42... Support shaft, 42c... (Support shaft) tip part, 43 ...Adjustment axis for left and right aiming adjustment, 44...
Adjustment shaft for vertical aiming adjustment, 46...Tension spring 2 Diagram? Figure 9

Claims (1)

[Claims] The spherical peripheral surface of the mounting ring holding the headlamp is slidably seated on the sliding contact portion of the lamp housing fixed to the vehicle body, so that the mounting ring is tiltably supported relative to the lamp housing. A guide in which an adjustment shaft for adjusting left and right aiming is installed between one side of the mounting ring and the lamp housing, a support shaft is provided protruding from the other side of the mounting ring, and a guide groove extending approximately in the front-rear direction is formed. A portion protrudes forward from the lamp housing substantially horizontally, and supports the tip portion of the support shaft in the guide groove so as to be slidable and rotatable in the direction around the axis, and the upper or lower portion of the mounting ring. An adjustment shaft for vertical aiming adjustment is installed between the lamp housing and the piston rod of the leveling drive mechanism, and a tension spring is tensioned between the lamp housing and a position of the mounting ring that is spaced from the two adjustment shafts. An automobile headlamp device characterized by the following: