JP2783959B2 - Automotive headlamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aiming screw rotating operation section for tilting and adjusting an irradiation axis of a headlamp, and a lamp side for setting a mounting position of the headlamp with respect to a vehicle body, on a rear surface of the lamp body. The present invention relates to an automobile headlamp provided with a reference projection.

[0002]

2. Description of the Related Art Automobile headlamps are shown in FIGS.
As shown in FIG. 1, a reflector 3 having a bulb 4 inserted therein is accommodated in a lamp chamber formed by a lamp body 1 and a front lens 2, and the reflector 3 is rotatably supported by the lamp body 1. The head 3 is supported by three points of aiming screws 5 and 6 and a ball joint 7 extending forward, and by rotating the aiming screws 5 and 6, the reflector 3 is tilted around the horizontal axis Lx and the vertical axis Ly, and The irradiation axis of the lamp can be tilted up, down, left and right. Reference numeral 8 denotes an aiming screw rotating operation unit formed of an orthogonal conversion gear mechanism for rotating the aiming screw 5, and includes a rotating operation shaft 8a extending upward along the back surface of the lamp body 1, the aiming screw 5 and the rotating operation shaft. It comprises a pair of gears 8b and 8c interposed between the gears 8a.

Reference numeral 9 denotes a bracket provided on the left and right side walls of the lamp body 1, and the bracket 9 is provided with bolt insertion holes 9a, 9b, 9c for fixing the lamp to the vehicle body. The bracket 9 has a lamp-side reference protrusion a which is a reference member for positioning the lamp with respect to the vehicle body.
The protrusion mounting portion a is engaged with the reference engagement hole b (see FIG. 14) on the vehicle body side, thereby determining the reference mounting position of the lamp. That is, the reference projecting portion a is engaged with the reference engagement hole b, and thereafter, the bolt insertion holes 9a, 9b, 9c, which are other fastening portions, are bolted to the vehicle body.

[0004]

However, the reference projection a in the conventional headlamp is of course provided at a position corresponding to the reference engagement hole b on the vehicle body side. No consideration is given as to where to place them. For this reason, depending on the position where the reference protrusion a is provided, as shown in FIG. 14, the worker holding the headlamp does not see the reference protrusion a at all during the headlamp mounting operation, and the reference protrusion a is There is a problem that it is difficult to engage with the hole b.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an automobile headlamp which can be easily attached to a vehicle body.

[0006]

In order to achieve the above object, in an automotive headlamp according to the present invention, an aiming screw rotating a tilting adjustment of an irradiation axis of the headlamp is provided on a back surface of a lamp body of the headlamp. An automotive headlamp provided with an operation unit and a lamp-side reference protrusion that engages with a vehicle-body-side reference engagement hole to set a lamp attachment reference position, wherein the aiming screw rotation operation unit includes a head. The lamp-side reference projecting portion is provided directly below the aiming screw rotating operation portion at a position above the rear surface of the lamp body which is easy for an operator supporting both sides of the head lamp from the front side of the lamp to see.

[0007]

The reference projection on the lamp side cannot be seen directly by the operator supporting the headlamp, but it is known that the reference projection on the lamp side is located directly below the aiming screw rotating operation part which is often seen by the operator. Since the headlamp is positioned so that the aiming screw rotation operation part is aligned with the vehicle-side reference engagement hole in the left-right direction, and then the headlamp is shifted vertically, the lamp-side reference protrusion is At a position vertically aligned with the engaging hole, the reference projecting portion is inserted into the reference engaging portion, and the two are engaged.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 11 show one embodiment of the present invention.
1 is a front view of an automobile headlamp according to an embodiment of the present invention, FIG. 2 is a plan view of the headlamp, and FIG. 3 is a horizontal sectional view of the headlamp (along line III-III shown in FIG. 1). 4 is a rear view of the headlamp, FIG. 5 is a right side view of the headlamp, FIG. 6 is a longitudinal sectional view of the headlamp (a sectional view taken along line VI-VI shown in FIG. 1), 7 is a longitudinal sectional view of the headlamp (a sectional view along line VII-VII shown in FIG. 1), and FIG. 8 is a longitudinal sectional view of the same headlamp (a line shown in FIG. 1).
VIII-VIII), FIG. 9 is a longitudinal sectional view of the same headlamp (sectional view along line IX-IX shown in FIG. 1), FIG.
Is a longitudinal sectional view of the headlamp (a sectional view along line XX shown in FIG. 4), and FIG.

In these figures, reference numeral 10 denotes a container-like lamp body which opens obliquely from the front, and a transparent front lens 11 is attached to the front opening of the lamp body 10 to form a lamp chamber. In the lamp room, a reflective lamp 20 for forming a traveling beam and a reflective lamp 30 for forming a passing beam are provided side by side. The lamp 20 for forming a traveling beam includes a reflector 22 having a paraboloid of revolution.
And a bulb 24 inserted into the bulb insertion hole 23 of the reflector 22. The light of the bulb 24 is reflected by the reflector 22, guided forward as substantially parallel light, and formed on the front lens 11. predetermined light distribution pattern for high beam is diffused by cylindrical steps S ₁ is a light distribution control step has been formed.

On the other hand, a lamp 30 for forming a low beam is used.
Is a reflector 32 having a specially shaped reflecting surface formed such that the direction of reflected light is different for each predetermined area.
A valve 34 inserted in the valve insertion hole 33 of the reflector 32 and a valve insertion hole 3 of the reflector 32
Rib 31 protruding forward from a position below 3 (see FIG. 6)
, Surrounding the valve 34, the reflector 3
The shade 35 is configured to cut light traveling toward an area other than the second predetermined effective reflection surface 32 a, and an inner lens 36 for controlling light distribution disposed in front of the reflector 32. And among the light of the bulb 34, the shade 3
The light directed to the area other than the effective reflection surface 32a of the reflector 32 (the part such as the top wall and the bottom wall) is blocked by the light 5, and the light reflected by the effective reflection surface 32a of the reflector 32 becomes substantially parallel light and is guided forward. he, is diffused in the lateral direction by a cylindrical step S ₂ is a light distribution control step formed in the inner lens 36, in the lateral direction by the cylindrical step S ₃ is a light distribution control step is further formed on the front lens 11 The light is diffused to form a predetermined light distribution pattern for the low beam.

When the lamps 20 and 30 are simultaneously turned on, the light distribution patterns formed by the two lamps 20 and 30 are combined to form a traveling beam, and when the lamp 30 is turned on alone, a passing beam is formed.
When the traveling beam is formed by turning on the lamp 20 alone, the lamp 30 is used only for forming the passing beam.

The reflectors 22 and 32 are integrally formed, and are rotatably supported on the rear wall of the lamp body 10 and extend forward with two aiming screws 1.
The lamp body 10 is tiltably supported by the ball joints 2 and 13 and one ball joint 14. The details of the aiming screws 12 and 13 and the ball joint 14 are shown in FIGS. 8 and 9, and reference numeral 40 in FIG. 8 denotes a turning operation unit of the aiming screw 12. A turning operation shaft 42 which is vertically arranged on the rear side of the lamp body 10 and whose upper end extends to a substantially upper position of the headlamp; a spur gear 43 which is mounted on the turning operation shaft 42; , The crown gear 4 which is axially mounted on the aiming screw 12 and meshes with the spur gear 43.
4 is integrally accommodated, and an engaging portion 4 for engaging with a driver or a wrench (spanner)
2a is provided. Reference numeral 46 denotes a nut screwed into the aiming screw 12, and the nut 46 is fitted to a bracket 47 on the reflector 32 side.
By rotating the aiming screw 12, the nut 46 advances and retreats along the screw 12, and the reflectors 22 and 32 integrally tilt around the vertical axis Ly,
Thereby, the optical axes of the lamps 20 and 30 can be tilted and adjusted in the left-right direction.

Reference numeral 50 in FIG. 9 denotes a rotating operation unit of the aiming screw 13 and the lamp body 1.
0, and an aiming screw 13 which rotates by a motor drive and moves back and forth with respect to the casing 51. The aiming screw 13 is driven by a signal sent from a control unit (not shown). It has a rotating structure. A ball 53 is formed at the tip of the aiming screw 13,
The ball portion 53 is supported by a ball receiving nut 55 fitted to the bracket 54 on the reflector 32 side, and the ball portion 53 and the ball receiving nut 55 form a ball joint. Therefore, when the aiming screw 13 is rotated, the nut 55 allows the ball portion 52 to rotate, so that the nut 55 and the screw 13 move forward and backward integrally in the front-rear direction, and the reflectors 22 and 32 integrally move around the horizontal axis Lx. Tilting, whereby the optical axes of the lamps 20 and 30 can be tilted up and down. The control unit (not shown) receives the signal from the inclination sensor that detects the inclination of the vehicle body with respect to the road surface, and rotates the aiming screw 13 by a predetermined amount so that the vertical inclination of the optical axis of the headlamp is always zero. Is output. That is, the rotation operation unit 50 constitutes an optical axis leveling mechanism of a headlamp together with a control unit and an inclination sensor (not shown). A rotating operation shaft 52 linked to the aiming screw 13 is provided in the casing 51, and an upper end portion of the operation shaft 52 has an engagement portion 52a with a driver.
Are formed. Therefore, by manually rotating the rotating operation shaft 52 using a driver, the turning operation of the aiming screw 13, that is, the reflector 2 is manually operated.
2, 32 can also be tilted and adjusted in the vertical direction.

An upper bracket 60 and left and right side brackets 70 and 80 are formed to extend from the lamp body 10.
2 are provided. A fastener insertion hole 72 (see FIG. 3) is provided in the left bracket 70, and a fastener 74 is inserted therein. Also the right side bracket 80
Are provided with bolt insertion holes 82 and 83. The respective brackets 60, 70, 80 are fastened to the vehicle body using bolts 73 (see FIGS. 5 and 6) and fasteners 74. The rectangular holes 84, 8 in the right bracket 80
5 is a hole for fastening a radiator grill (not shown) arranged on the front surface of the radiator.
(Shown by oblique lines in FIG. 4) is a contact surface of the radiator grill.

At a position directly below the rotary operation unit 40 provided on the lamp body 10, a hollow body-shaped first reference projection 90 formed integrally with the lamp body 10 is provided. A second reference projection 91 is provided at 80, and these projections 90, 91 are engaged with first and second reference engagement holes 92, 93 (see FIG. 11) on the vehicle body side. The reference mounting position of the headlamp with respect to the vehicle body is determined. The upper end 42a of the rotary operation shaft 42 of the rotary operation unit 40 located directly above the reference projecting portion 90 is provided at substantially the same height as the upper edge of the headlamp. Operation axis 4
2 is a guide when positioning the headlamp on the vehicle body.

That is, as shown in FIG. 11, when mounting the headlamp, when holding the headlamp by manually supporting both ends of the lamp from the front side of the headlamp, the headlamp is held. Reference protrusion 9 from operator
Although 0 and 91 are not visible at all, the upper end 4
2a looks good. Therefore, the position of the rotation operation shaft 42 is aligned in the left-right direction with the first reference engagement hole 92 on the vehicle body side, and then the headlamp is moved vertically (see the arrow in FIG. 11).
The reference projection 90 is inserted into the reference engagement hole 92 at a position where the reference projection 90 coincides with the reference engagement hole 92 in the vertical direction, and the reference position on the left side of the headlamp is determined. Next, when the right side of the headlamp is swung up and down around the engaging portion between the reference projection 90 and the reference engagement hole 92, the second reference projection 91 matches the second reference engagement hole 93. When the protrusion 91 reaches the position shown in FIG.
To determine the reference position on the right side of the headlamp.

Next, an operation of attaching the headlamp to the vehicle body will be described. First, as shown in FIG. 11, the first reference projecting portion 90 is inserted into the first reference engaging hole by holding the headlamp so as to support the left and right end portions from the front side of the lamp and directly facing the lamp housing portion of the vehicle body. 92. Since the engagement of the reference projection 90 with the engagement hole 92 is performed using the aiming screw rotation operation shaft 42 as a mark as described above, the operation is simply completed in a short time. Next, the right portion of the lamp is swung up and down around the engagement portion, and the second reference projection 91
Is engaged with the second reference engagement hole 93 on the vehicle body side, whereby the head lamp is positioned with respect to the vehicle body. At this time, the bolt insertion portion 62 of the upper bracket 60 of the lamp and the bolt insertion holes 82 and 8 of the side bracket 80 are provided.
3. Fastener 74 fitted to side bracket 80
Are located at positions corresponding to the weld nut and the fastener insertion hole on the vehicle body side, respectively, and the brackets 60, 70, and 80 are fixed to the vehicle body using bolts 73 and fasteners 74, so that the headlamp can be attached to the vehicle body. Complete.

Reference numerals 100 and 101 in FIGS. 3 and 4 denote air holes provided at both left and right end portions on the rear side of the lamp body 10, through which air flows in and out of the lamp through the holes 100 and 101. Due to the formation of natural convection in the lamp room, dew condensation on the front lens 11 is prevented. As shown in FIGS. 4 and 10, upper and lower regions 10a and 10b of the rear wall of the lamp body 10 in which the air holes 100 and 101 are provided are formed in a shape bulging rearward, and the volume of the lamp room is increased. Is enlarged, and the amount of water with respect to the water in the lamp room is increased, so that the structure is hardly condensed. Note that reference numeral 104,
Reference numeral 105 denotes an air tube attached to the air hole forming cylindrical portions 102 and 103. The structure of this air tube is disclosed in detail in Japanese Utility Model Application Laid-Open No. 63-191502, which has already been filed. Omitted.

Since the reference projection 90 is formed in the vicinity of the air hole 100, the reference projection 90 can be used as a guide for the air tube attachment position. That is, the cylindrical portion 103 to which the air tube 105 is attached is the lamp body 10.
Is formed in the concave portion (see FIG. 4) 10c, and the amount of protrusion is extremely small. Therefore, it is not easy to find the position of the cylindrical portion 103 in the air tube attaching operation. Since it is large, it can be visually recognized at a glance, and using the position of this reference projection 90 as a guide, the cylindrical portion 1
Since 03 can be easily found, the work of attaching the air tube can be smoothly performed.

Since the rotating operation unit 40 has a built-in gear mechanism, it is desirable that the unit 40 should not be exposed to water. , The water that jumps up while the vehicle is running does not reach the rotation operation unit 40 because the reference protrusion 90 serves as a barrier, so that the rotation operation unit 40 is hardly exposed to water.

In the above embodiment, the reflector movable type headlamp in which a separate reflector is provided in the lamp body has been described as an example, but the headlamp in which the reflector is integrally formed on the inner peripheral surface of the lamp body is described. It is needless to say that the present invention can be similarly applied to a movable unit type headlamp which is supported by a lamp housing via an aiming mechanism, and provided with a lamp-side reference projection and an aiming screw rotating operation unit on the lamp housing.

[0022]

As is apparent from the above description, according to the vehicle headlamp according to the present invention, the reference projection on the lamp side is not directly visible to the worker supporting the headlamp, Using the aiming screw rotating operation part that is directly above the reference projection part and is clearly visible to the operator, the lamp-side reference projection part can be engaged with the vehicle body-side reference engagement hole. This facilitates the engagement of the part with the reference engagement part on the vehicle body side, and simplifies the work of mounting the headlamp.

[Brief description of the drawings]

FIG. 1 is a front view of an automobile headlamp according to an embodiment of the present invention.

FIG. 2 is a plan view of the headlamp.

FIG. 3 is a horizontal sectional view of the headlamp (the line II shown in FIG. 1).
Sectional view along I-III)

FIG. 4 is a rear view of the headlamp.

FIG. 5 is a right side view of the headlamp.

FIG. 6 is a vertical sectional view of the headlamp (the line VI- shown in FIG. 1);
Sectional view along VI)

FIG. 7 is a vertical sectional view of the headlamp (the line VII shown in FIG. 1).
Sectional view along -VII)

FIG. 8 is a longitudinal sectional view of the headlamp (the line shown in FIGS. 1 and 4);
Sectional view along VIII-VIII)

FIG. 9 is a longitudinal sectional view of the headlamp (the line IX shown in FIG. 1).
Sectional view along -IX)

FIG. 10 is a vertical sectional view of the headlamp (a line X shown in FIG. 4).
Sectional view along -X)

FIG. 11 is a diagram showing a state of an operation of attaching the headlamp to a vehicle body.

FIG. 12 is a front view of a conventional automobile headlamp.

FIG. 13 is a longitudinal sectional view of the same headlamp (a sectional view taken along line XIII-XIII shown in FIG. 12).

FIG. 14 is a diagram showing a state in which a conventional headlamp is attached to a vehicle body.

DESCRIPTION OF SYMBOLS 10 Lamp body 11 Front lens 12 Aiming screw 32 Reflector 40 Rotating operation unit which is an aiming screw rotation operation part 42 Aiming screw rotation operation shaft 90 First reference projection on headlamp side 91 Headlamp Side second reference projection 92 first reference engagement hole on the vehicle body side 93 second reference engagement hole on the vehicle body L irradiation axis of the headlamp

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/20

Claims (1)

(57) [Claims] Claims: 1. On the back of a lamp body of a headlamp,
An automotive headlamp provided with an aiming screw rotating operation part for tilting and adjusting the irradiation axis of the headlamp and a lamp-side reference projection for engaging with the vehicle-body-side reference engagement hole to set the lamp mounting reference position. The aiming screw turning operation unit is provided at an upper position on the back of the lamp body, which is easily seen by a worker supporting both sides of the head lamp from the front side of the headlamp, and the aiming screw turning operation unit is provided immediately below the aiming screw turning operation unit. An automotive headlamp, wherein a lamp-side reference projection is provided.