JPH0727005U - Headlamp optical axis adjustment device - Google Patents

Abstract

(57) [Summary] [Purpose] With a simple structure, initial adjustment of the irradiation direction and adjustment according to the load can be performed. A tip end of an adjusting shaft 25 slidably and rotatably supported by a lamp housing 1 is screwed into a nut 12 supported by a rotating end of a reflector 3 rotatably supported by the lamp housing. To do. A forward movement force is applied to the adjustment shaft by the coil spring 34. The inclined surface 18 and the lever portion 19 of the fixed base 15 fixed to the lamp housing
And the inclined surface 22 of the. The adjustment shaft is inserted through the fixed base and the lever portion, and the flange 27 of the adjustment shaft is elastically contacted with the rear surface of the base portion 20 of the lever portion. The lever portion is rotated to change the contact position between the inclined surface of the lever portion and the inclined surface of the fixed base to move the position of the rear surface of the base portion of the lever portion, thereby moving the adjustment shaft back and forth. The rear end of the adjustment shaft is slidably and non-rotatably connected to one bevel gear 37 of the orthogonal conversion mechanism 35 which is a combination of two bevel gears 37 and 38.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a novel headlamp optical axis adjusting device. More specifically, the present invention aims to provide a novel headlamp optical axis adjustment device capable of performing initial adjustment of the irradiation direction and adjustment according to the load with a simple structure.

[0002]

[Prior art]

 Headlamps for four-wheeled vehicles are used to adjust the irradiation direction when there is no load or when only one driver is in the vehicle, so-called initial aiming adjustment, as well as changes in the load, that is, the number of passengers increases or decreases. Depending on the type, the so-called leveling adjustment, which adjusts the irradiation direction, can be performed.

By the way, even in a two-wheeled vehicle, the need for leveling adjustment has been advocated, and a device therefor has been proposed.

In a two-wheeled vehicle, even if the load changes, it is either one-seater or two-seater. Therefore, a simple two-step operation is sufficient, and a simple lever change is required. An example in which the irradiation direction is switched between one-seater and two-seater is proposed in, for example, Japanese Utility Model Laid-Open No. 61-178209.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional headlamp optical axis adjustment device, the adjustment axis extends in an oblique direction, which increases the depth of the entire device, which is a space constraint compared to a four-wheeled vehicle. In the case of large motorcycles, there was the problem that it was difficult to secure a space for installation.

[0006]

[Means for Solving the Problems]

 The optical axis adjusting device for a headlamp according to the present invention is made in order to solve the above-mentioned problems, and a tilting member whose irradiation direction is changed by tilting the tilting member and the tilting member being rotatable. A fixed side member to support, an adjustment shaft rotatably and axially movably supported by the fixed side member, and screwed into a nut supported by the tilting member, and the adjustment shaft in the axial direction. An elastic means for urging the adjusting shaft to one side, a lever mechanism for moving the adjusting shaft in the axial direction by the urging force of the elastic means or against it, a fixed side member rotatably supported and the adjusting shaft. It consists of a rotating body that is non-rotatably coupled and that is rotated from the outside by a shaft member that extends in a direction that is perpendicular to the adjustment shaft. Combined with the above The adjustment shaft is made up of a lever part that is in elastic contact with the fixed base and the lever part has an inclined surface that is in sliding contact with each other. The sliding member is moved in the axial direction, whereby the elastic contact portion of the adjusting shaft is moved in the axial direction and the tilting member is tilted.

[0007]

[Action]

 Therefore, in the optical axis adjusting device for a headlamp according to the present invention, the shaft member for rotating the rotating body for aiming adjustment extends in the direction orthogonal to the adjusting axis, which reduces the depth of the entire device. Therefore, it is suitable as an optical axis adjusting device for a headlamp for a two-wheeled vehicle, which has a large space limitation.

[0008]

【Example】

 Hereinafter, the details of the optical axis adjusting device for a headlamp according to the present invention will be described with reference to the illustrated embodiments.

1 to 5 show a first embodiment of an optical axis adjusting device for a headlamp according to the present invention.

In FIG. 1, reference numeral 1 denotes a lamp housing made of synthetic resin, which has a container shape having an opening toward the front. The lamp housing 1 serves as a fixed member fixed to a vehicle body (not shown) of a two-wheeled vehicle. A mounting groove 2 is formed on the opening edge of the lamp housing 1 so as to open toward the front. Then, the rear end portion of a lens (not shown) is fitted and supported in the installation groove 2.

Reference numeral 3 denotes a reflector that is tiltably disposed in the lamp housing 1, and the reflector 3 serves as a tilting member.

The reflector 3 is made of a synthetic resin and has a concave surface 4 that is open toward the front, and the concave surface 4 is subjected to a reflective surface treatment to form a reflective surface.

Reference numeral 5 denotes a light bulb, which is attached to the rear center of the reflector 3.

Such a reflector 3 is tiltably supported by the lamp housing 1.

Reference numeral 6 denotes a fulcrum shaft provided at the lower end of the inner surface of the lamp housing 1 so as to project forward, and a sphere portion 7 is formed at the front end thereof.

Reference numeral 8 denotes a support portion projecting from the rear surface of the lower end portion of the reflector 3, and a support 9 made of synthetic resin is supported by the support portion 8. A spherical concave portion 10 having an opening on the rear surface is formed in the receiving body 9, and the spherical portion 7 of the fulcrum shaft 6 is fitted into the spherical concave portion 10 to form a rotation fulcrum portion.

Reference numeral 11 denotes a support portion protruding from the rear surface of the upper end portion of the reflector 3, and a nut 12 made of synthetic resin is supported by the support portion 11.

An insertion hole 14 is formed at a position corresponding to a portion of the upper end of the rear wall 13 of the lamp housing 1 where the nut 12 of the reflector 3 is supported. A fixed base 15 is integrally projected from a portion surrounding the hole 14. An insertion hole 15 a communicating with the insertion hole 14 is provided through the fixing table 15.

The fixed base 15 is formed by integrally forming a base portion 16 in the first half and a fitting portion 17 in the latter half. The fitting portion 17 is formed to have a smaller diameter than that of the base portion 16 and further toward the rear end. It is shaped like a truncated cone with a smaller diameter. A step portion 18 facing rearward is formed at the boundary between the base portion 16 and the fitting portion 17, and the step portion 18 is high at the upper end (a large amount of protrusion from the rear surface of the rear wall 13) and low at the lower end (the above-mentioned). It is formed on an inclined surface (with a small protrusion amount).

Reference numeral 19 denotes a lever portion that constitutes a lever mechanism together with the fixed base 15, and is made of synthetic resin, and has a substantially cylindrical base portion 20 and a lever 21 that projects laterally from the side surface of the base portion 20. Are integrally formed.

The front surface 22 of the base 20 is formed as an inclined surface, and the inclination of the inclined surface 22 is equal to the inclination of the inclined surface 18 of the fixing table 15. Further, the base 20 is formed with a conical recess 23 having a large diameter at the front end and a small diameter at the rear end, and a continuous insertion hole 24 is formed at the rear end at the rear end of the recess 23. Has been done.

Then, the base portion 20 of the lever portion 19 is fitted onto the fitting portion 17 of the fixed base 15 so that the inclined surface 22 of the lever portion 19 exactly overlaps the inclined surface 18 of the fixed base 15.

Reference numeral 25 is an adjustment shaft. The adjusting shaft 25 has a substantially round bar shape as a whole, a portion 26 that is approximately one third stronger from the front end is a screw shaft portion, and a flange 27 is integrally formed at the rear end portion. A flat plate-like engaging portion 28 is provided so as to project rearward. A portion 29 between the screw shaft portion 26 and the flange 27 is a cylindrical insertion portion, and a portion 29a approximately three-fifth from the rear end of the insertion portion 29 is a portion in front of it. It is formed to have a slightly smaller diameter.

The adjusting shaft 25 as described above is inserted from the rear in this order through the insertion hole 24 of the lever portion 19 of the lever mechanism, the insertion hole 15a of the fixed base, and the insertion hole 14 of the lamp housing 1, and its screw shaft portion. 26 is screwed onto the nut 12 supported by the rotating end of the reflector 3.

An O-ring 30 is fitted in a notch 31 formed in the front opening edge of the insertion hole 14. Reference numeral 32 is an annular pressing ring, which is positioned so as to close the notch in which the O-ring 30 is fitted.

A washer 33 is externally fitted to the small diameter portion 29a of the insertion portion 29 of the adjusting shaft 25, and is engaged with the step portion 29b formed at the boundary between the small diameter portion 29a and the portion before it. And it does not move forward than that.

Reference numeral 34 denotes a coil spring, which is externally fitted to the insertion portion 29 of the adjustment shaft 25 in a compressed state between the washer 33 and the pressing ring 32. Therefore, a forward moving force is applied to the adjusting shaft 25 by the elastic force of the coil spring 34, and the adjustment is performed when the flange 27 of the adjusting shaft 25 comes into contact with the rear end surface of the base portion 20 of the lever portion 19. The position of the shaft 25 is defined.

Reference numeral 35 denotes an orthogonal conversion mechanism, in which two bevel gears 37 and 38 are arranged in a case 36 so that their axes can rotate and mesh with each other. An engaging hole 37a extending in the axial direction is formed in the one bevel gear 37, the engaging hole 37a has a flat plate shape, and the engaging hole 37a faces the outside of the case. There is. One end of an operating shaft 39 is fixed to the other bevel gear 38, and the operating shaft 39 extends outside the case.

Reference numeral 40 denotes a surrounding wall projecting at a position surrounding the lever mechanism forming portion on the rear surface of the rear wall 13 of the lamp housing 1, and mounting attachment projecting on the case 36 of the orthogonal transformation mechanism 35. The orthogonal transformation mechanism 35 is fixed to the lamp housing 1 by screwing the screws 42, 42, ... Inserted in the portion 41 into the rear end of the surrounding wall 40.

The tip of the lever portion 19 of the lever mechanism is projected to the outside of the surrounding wall 40 through a slit 40 a formed in the surrounding wall 40.

Then, when the orthogonal conversion mechanism 35 is fixed to the lamp housing 1, the engaging portion 28 formed at the rear end of the adjustment shaft 25 is fitted into the engagement hole 37 a of the one bevel gear 37 of the orthogonal conversion mechanism 35. It is slidably engaged.

Next, the operation of the above-described headlamp optical axis adjusting device will be described.

The initial aiming adjustment is performed by rotating the operation shaft 39 of the orthogonal transformation mechanism 35.

When the operation shaft 39 is rotated, the bevel gear 37 is rotated via the bevel gear 38, and the adjustment shaft 25 engaged with the engagement hole 37 a of the bevel gear 37 is rotated. Then, when the adjustment shaft 25 rotates, the screw shaft portion 26 is screwed into or unscrewed from the nut 12 according to the direction of rotation thereof, whereby the lamp housing of the rotating end portion of the reflector 3 is rotated. The distance between 1 and the rear wall 13 changes, so that the reflector 3 is tilted.

Next, the leveling adjustment will be described.

In the state shown in FIG. 5, that is, the portion of the base portion 20 of the lever portion 19 located at the most front end of the inclined surface 22 and the portion of the fixed base 15 located at the most rear end of the inclined surface 18 are in contact with each other. The state of irradiation is the irradiation direction when one driver is in the vehicle. If another passenger rides in the rear seat from this state, the rear part of the vehicle body will sink and the irradiation direction will be upward, causing the dazzling light of oncoming vehicles and pedestrians.

Therefore, the lever portion 19 of the lever mechanism is rotated to bring the inclined surface 22 of the lever portion 19 and the inclined surface 18 of the fixed base 15 into close contact with each other (see FIG. 2). As a result, the rear surface of the base portion 20 of the lever portion 19 moves forward from the position in the state shown in FIG. 5, and therefore the flange 27 abuts against the rear surface of the base portion 20 of the lever portion 19 so that it is further forwardly moved. The forward movement force urged by the coil spring 34 via the washer 33 causes the adjustment shaft 25, which has been prevented from moving, to cause the flange 27 to again come into contact with the rear surface of the base portion 20 of the lever portion 19 moved forward. To move forward. Therefore, the upper end of the reflector 3 connected to the front end of the adjusting shaft 25 is displaced forward, whereby the reflector 3 is rotated downward, and the irradiation direction is changed downward.

6 to 10 show a second embodiment of an optical axis adjusting device for a headlamp according to the present invention.

A projecting part 43 is formed at a position corresponding to a part of the upper end part of the rear wall 13 of the lamp housing 1 where the nut 12 of the reflector 3 is supported. A recess 44 is formed on the rear surface. An insertion hole 45 is formed in the center of the protrusion 43, and a notch 46 is formed along the entire circumference at the rear opening edge of the insertion hole 45.

Reference numeral 47 denotes an adjusting shaft, which has a substantially round bar shape as a whole, and a portion of about 1/3 from the front end is formed on the screw shaft portion 48, and a position of about 1/3 from the rear end to the front is provided. The bevel gear 49 is formed integrally with the. Gear teeth are formed on the front surface of the bevel gear 49.

A small flange 50 is integrally projectingly provided on the adjusting shaft 47 at a position slightly forward of the bevel gear 49, and a regular hexagonal head 51 is formed at the rear end. There is.

A portion of the adjustment shaft 47 on the front side of the flange 50 is slidably and rotatably inserted into the insertion hole 45 of the lamp housing 1, and a screw shaft portion 48 thereof is supported by the reflector 3. It is screwed to the nut 12.

Reference numeral 52 is an O-ring, which is externally fitted to a portion of the adjustment shaft 47 on the front side of the flange 50 in the notch 46 formed in the rear opening edge of the insertion hole 45.

Reference numeral 53 is a washer, which is externally fitted to a portion of the adjustment shaft 47 on the front side of the flange 50 and covers the notch 46 in which the O-ring 52 is fitted.

The coil spring 54, which is externally fitted to the front portion of the flange 50 of the adjusting shaft 47, is compressed between the flange 50 and the washer 53, whereby the adjusting shaft 47 is attached. Is urged to move backward.

Reference numeral 55 denotes an enclosing wall projectingly provided on the rear surface of the rear wall 13 of the lamp housing 1 so as to surround the recess 44, and the insertion hole 5 6 is provided at a position in contact with the rear surface of the rear wall 13 located above. Are formed. Further, a slightly larger slit 57 is formed on one side surface of the surrounding wall 55.

Reference numeral 58 is a substrate of the lever mechanism, and a fixed base 59 is provided in a protruding manner at the center of the front surface thereof. The fixed base 59 is formed by integrally forming a base portion 60 in the latter half and a fitting portion 61 in the first half. The fitting portion 61 is formed to have a smaller diameter than the base portion 60, and has a diameter that increases as it goes to the front end. It is shaped like a truncated cone. A step portion 62 facing forward is formed at a boundary between the base portion 60 and the fitting portion 61, and the step portion 62 is high at a lower end (a protrusion amount from the substrate 58 is large) and low at an upper end (the above protrusion). It is formed on an inclined surface (a small amount). An insertion hole 63 is formed in the substrate 58 so as to penetrate the central portion of the fixed base 59.

Reference numeral 64 denotes a lever portion that constitutes a lever mechanism together with the fixed base 59, is made of synthetic resin, and has a substantially cylindrical base portion 65 and a lever 66 protruding laterally from the side surface of the base portion 65. Are integrally formed.

The rear surface 67 of the base portion 65 is formed as an inclined surface, and the inclination of the inclined surface 67 is equal to the inclination of the inclined surface 62 of the fixing table 59. Further, a conical recess 68 having a small diameter at the front end and a large diameter at the rear end is formed in the base portion 65, and an insertion hole 69 continuous with the front end of the recess 68 is formed in the front end portion. There is.

The base portion 65 of the lever portion 64 is externally fitted to the fitting portion 61 of the fixed base 59 so that the inclined surface 67 of the lever portion 64 exactly overlaps the inclined surface 62 of the fixed base 59.

Then, the substrate 58 is fixed to the rear end surface of the surrounding wall 55 with screws or the like, and the lever 66 of the lever portion 64 is projected laterally from the slit 57 formed in the side surface portion of the surrounding wall 55. .

The rear portion of the adjustment shaft 47 from the bevel gear 49 is slidably and rotatably inserted into the insertion hole 69 of the lever portion 64, the fixed base 59, and the insertion hole 63 of the substrate 58. The rear surface of the bevel gear 49 comes into contact with the front surface of the base portion 65 of the lever portion 64 to prevent the rearward movement due to the force biased by the coil spring 54, thereby defining the position thereof.

Next, the operation of the optical axis adjusting device for a headlamp according to the second embodiment described above will be described.

The initial aiming adjustment is performed by rotating the adjustment shaft 47.

The rotation of the adjustment shaft 47 is performed by, for example, the tip of a Phillips screwdriver.

Reference numeral 70 denotes a Phillips screwdriver, which inserts its tip portion 71 into an area surrounded by the surrounding wall 55 from an insertion hole 56 formed in the upper surface of the surrounding wall 55. Then, the tip portion 71 meshes with the bevel gear 49 provided integrally with the adjustment shaft 47. Therefore, by rotating the plus driver 70, the bevel gear 49 rotates, which causes the adjusting shaft 47 to rotate.

Then, when the adjusting shaft 47 rotates, the screw shaft portion 48 is screwed into or unscrewed from the nut 12 depending on the direction of rotation thereof, whereby the rotating end portion of the reflector 3 is rotated. The distance between the lamp housing 1 and the rear wall 13 changes, so that the reflector 3 is tilted.

Next, the leveling adjustment will be described.

The state shown in FIG. 6, that is, the state where the inclined surface 67 of the lever portion 64 and the inclined surface 62 of the fixed base 59 are in close contact with each other is the irradiation direction when one driver is in the vehicle. If another person rides in the rear seat from this state, the rear part of the vehicle body will sink and the direction of irradiation will be upward, causing the dazzling light of oncoming vehicles and pedestrians.

Therefore, the lever 66 protruding to the outside of the surrounding wall 55 is operated to rotate the lever portion 64, and the portion at the rearmost end of the inclined surface 67 of the base portion 65 of the lever portion 64 and the fixed base. It is assumed that 59 is in contact with the most front end portion of the inclined surface 62 (see FIG. 10). As a result, the front surface of the base portion 65 of the lever portion 64 moves forward from the position in the state shown in FIG. 6, so that the bevel gear 49 of the adjusting shaft 47 is pushed forward by the front surface of the base portion 65, and the adjusting shaft 47 moves in the coil. It is moved forward against the biasing force of the spring 54. Therefore, the upper end of the reflector 3 connected to the front end of the adjusting shaft 47 is displaced forward, whereby the reflector 3 is rotated downward and the irradiation direction is changed downward.

[0061]

[Effect of device]

 As is apparent from the above description, the optical axis adjusting device of the present invention has a tilting member whose irradiation direction is changed by tilting, and a fixed side which rotatably supports the tilting member. Member, an adjustment shaft rotatably and axially movably supported by the fixed member, and screwed into a nut supported by the tilting member, and the adjustment shaft is urged to one side in the axial direction. And a lever mechanism for moving the adjustment shaft in the axial direction by the urging force of the elastic means or against it, and the fixed shaft is rotatably supported and the adjustment shaft cannot rotate. The lever mechanism is connected to a fixed base fixed to a fixed side member and is rotatably connected to the fixed base. Together with the above adjustment axis The lever part is in elastic contact, and the fixed base and the lever part have slanted surfaces that are in slidable contact with each other.By rotating the lever part, the slanted surface slides on the slanted surface of the fixed base. The moving member is moved in the axial direction, whereby the elastic contact portion of the adjusting shaft is moved in the axial direction and the tilting member is tilted.

Accordingly, in the headlamp optical axis adjusting device of the present invention, the shaft member for rotating the rotating body for the aiming adjustment extends in the direction orthogonal to the adjusting axis, so that the entire apparatus is adjusted. It is suitable as an optical axis adjustment device for headlamps for two-wheeled vehicles, which can reduce the depth and has a large space constraint.

Although the above-described embodiments show the present invention applied to a so-called movable reflector mirror type headlamp, the present invention is not limited to such a type, and is applicable to, for example, a unit movable type headlamp. Needless to say, in this case, the tilting member is a lamp body having a reflector integrally or separately provided with a lens so as to cover the front surface thereof. It becomes a headlamp unit in which an electric ball is arranged in the space formed by.

In addition, the shapes and structures of the respective parts shown in each of the above-mentioned embodiments are merely examples of the embodiment in carrying out the present invention, and the technical and technical aspects of the present invention can be achieved by these. The range should not be construed as limiting.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an optical axis adjusting device for a headlamp according to the present invention together with FIGS. 2 to 5, which is a schematic cross-sectional view.

FIG. 2 is an enlarged sectional view showing a main part.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is an exploded perspective view of a lever mechanism.

5 is an enlarged cross-sectional view of an essential part showing a state in which the lever mechanism is operated to displace the adjustment shaft rearward from the state of FIG. 2.

FIG. 6 shows a second embodiment of the optical axis adjusting device for a headlamp according to the present invention, together with FIGS. 7 to 10, and is a sectional view showing an enlarged main part.

7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 is an exploded perspective view of a lever mechanism.

FIG. 9 is an enlarged cross-sectional view of a main part showing a state where initial aiming adjustment is performed.

FIG. 10 is an enlarged cross-sectional view of a main part showing a state where the lever mechanism is operated to displace the adjustment shaft forward from the state of FIG. 6;

[Explanation of symbols]

 1 Lamp Housing (Fixed Side Member) 3 Reflector (Tilt Member) 12 Nut 15 Fixing Stand 18 Fixed Table Slope 19 Lever 22 Slope of Lever 25 Adjustment Axis 27 Flange (Elastic Contact of Adjustment Axis) 34 Coil Spring (Elasticating means) 37 Bevel gear (rotating body) 39 Operation shaft (shaft member) 47 Adjusting shaft 49 Bevel gear (rotating body) (Elastic contact part of adjusting shaft) 54 Coil spring (Elasticating means) 59 Fixing base 62 Fixing base Inclined surface 64 Lever portion 67 Inclined surface of lever portion 70 Phillips screwdriver (shaft member)

Claims (1)

[Scope of utility model registration request] 1. A tilting member whose irradiation direction is changed by tilting, a fixed side member which rotatably supports the tilting member, and a rotatably and axially movable support to the fixed side member. The adjusting shaft screwed into the nut supported by the tilting member, the elastic means for urging the adjusting shaft to one side in the axial direction, and the adjusting shaft by the urging force of the elastic means or against this. A lever mechanism for rotatably supporting the fixed side member and a rotating body that is rotatably supported by the fixed side member and is rotated from the outside by a shaft member that is non-rotatably coupled to the adjustment shaft and extends in a direction orthogonal to the adjustment shaft. Consists of
The lever mechanism includes a fixed base fixed to the fixed side member and a lever unit rotatably coupled to the fixed base and having the adjustment shaft elastically contacted with each other. The fixed base and the lever unit slide with each other. The lever portion has an inclining surface in contact therewith, and the lever portion is moved in the axial direction by sliding the inclined surface of the fixing base by rotating the lever portion, whereby the elastic contact portion of the adjusting shaft is moved. An optical axis adjusting device for a headlamp, wherein the tilting member is tilted by moving in the axial direction.