JP2009129739A - Headlamp for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce or eliminate damages by a collision object when there occurs a collision against a vehicle headlamp from the front. <P>SOLUTION: The vehicle headlamp is provided with a lamp unit 40 which is housed in a lamp chamber 11 demarcated by a lamp housing 20 and a cover 30 which closes the front aperture of the lamp housing and has a light source; and an aiming mechanism 50 which supports the lamp unit capably slant-moving to the lamp housing. The aiming mechanism is constructed of an aiming fulcrum 51 to constitute slanting fulcrum of the lamp unit, an aiming screw 52 which is supported rotatably to the lamp housing and extends to the front, and a bearing 53 of synthetic resin which is supported to a bracket 42b installed on the lamp unit and moves in front and rear direction along the aiming screw according to rotation of the aiming screw. A cut-out portion which extends in axial direction of the aiming screw is formed in the bearing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle headlamp. More specifically, the present invention relates to a technical field for reducing or eliminating damage to a collision object when a vehicle headlamp collides from the front.

  One example of a vehicle headlamp is disclosed in Patent Document 1.

  The vehicle headlamp disclosed in Patent Document 1 is formed by arranging a lamp unit in a lamp chamber defined by a lamp body and a translucent cover that closes the front opening of the lamp body. These lamp units are supported by the lamp body through an aiming mechanism so as to be tiltable.

  The lamp unit has substantially the same structure. That is, the lamp unit has a structure in which a lens holder is fixed to a front end of a reflector that supports a light source, and a projection lens is supported on the front end of the lens holder. An extension panel that closes the aiming mechanism with respect to the front is disposed between the lamp unit and the translucent cover.

JP 2006-49189 A

  By the way, not only the vehicle headlamp shown in Patent Document 1 described above, but also a vehicle headlamp is installed at the foremost portion of a vehicle having a large mass. There is a great possibility that it will collide with the opponent first. And when the other party of a collision is a pedestrian, there exists a possibility of giving a pedestrian a big damage, such as injury.

  For example, by configuring the translucent cover and the extension panel so as to be easily deformed by a collision with a pedestrian, the impact due to the collision can be reduced and damage to the pedestrian or the like can be reduced.

  However, the lamp unit is located inside the translucent cover and the extension panel. The lamp unit is not limited to the one described above, and has a certain rigidity in structure and is not easily deformed. In particular, the projector-type lamp unit described above often uses aluminum die-casting for the reflector, aluminum die-casting or metal plate for the lens holder, and glass for the projection lens. There are many.

  For this reason, even if the folding corner, translucent cover, or extension panel is deformed, no further deformation is made after they come into contact with the lamp unit, resulting in a considerable impact on pedestrians. There is.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce or eliminate the damage of a collision object when a vehicular headlamp collides from the front.

  In order to solve the above-described problem, a vehicle headlamp is housed in a lamp chamber defined by a lamp housing and a cover that closes a front opening of the lamp housing, and a lamp unit including a light source; An aiming mechanism interposed between the lamp housing and the lamp unit and supporting the lamp unit so as to be tiltable with respect to the lamp housing, the aiming mechanism comprising an aiming fulcrum constituting a tilting fulcrum of the lamp unit And an aiming screw that is rotatably supported by the lamp housing and extends forward, and is supported by a bracket provided in the lamp unit, and the aiming screw is screwed together, and according to the rotation of the aiming screw A synthetic resin base moving in the front-rear direction along the aiming screw. Is composed of a ring, the bearing notch extending in the axial direction of said aiming screw is formed.

  Therefore, in the vehicle headlamp, when the cover is deformed rearward, the deformed cover pushes the lamp unit rearward, and the bearing moves away from the aiming screw, or the bearing moves along the aiming screw. Move backward.

  A vehicle headlamp according to the present invention is housed in a lamp chamber defined by a lamp housing and a cover that closes a front opening of the lamp housing, and includes a lamp unit, and the lamp housing and the lamp unit. And an aiming mechanism for supporting the lamp unit in a tiltable manner with respect to the lamp housing. The aiming mechanism constitutes a tilting fulcrum of the lamp unit. An aiming fulcrum, an aiming screw that is rotatably supported by the lamp housing and extends forward, is supported by a bracket provided on the lamp unit, and the aiming screw is screwed together to rotate the aiming screw. Synthetic resin bear that moves in the longitudinal direction along the aiming screw Is composed of a ring, the bearing is characterized in that the notch extends in the axial direction of said aiming screw is formed.

  Therefore, in the vehicle headlamp according to the present invention, when the cover is deformed rearward, the deformed cover pushes the lamp unit rearward, and the force to rotate the lamp unit or substantially orthogonal to the front-rear direction. Since a force to move in the direction is applied, a backward moving force or a moving force in a direction perpendicular to the front-rear direction is applied to the bearing supported by the lamp unit. And since the weak part is formed in the bearing by the notch and / or the holding force with respect to the aiming screw is reduced, the bearing slides in the axial direction of the aiming screw or the bearing falls off the aiming screw. Therefore, the lamp unit rotates or moves backward. Therefore, the impact due to the collision can be reduced in combination with the deformation of the cover.

  In the invention described in claim 2, since the width of the notch in the direction perpendicular to the axial direction of the aiming screw is equal to or less than the radius of the aiming screw, a special load due to collision or the like on the bearing is normal. In the state where it is not applied, there is no possibility that the bearing will fall off the aiming screw.

  In the invention described in claim 3, the center of the notch in the direction orthogonal to the axial direction of the aiming screw is offset in the left-right direction from the vertical plane passing through the central axis of the aiming screw. The bearing will not fall off the aiming screw even if a downward load is applied due to the weight of the unit.

  In the invention described in claim 4, since the notch is located above a horizontal plane passing through the central axis of the aiming screw, when the bearing is provided on the upper side of the lamp unit, it is applied to the bearing. The bearing tends to open from the notch in the circumferential direction of the aiming screw due to the rearward or rearward downward moving force, and the rearward movement of the bearing and / or the rearward downward drop tends to occur.

  In the invention described in claim 5, the lamp unit is supported by a reflector that supports a light source, a convex lens that projects the light of the light source reflected by the reflector forward, and a front portion of the reflector. In addition, since the projection lamp unit includes a lens holder that supports the convex lens so as to close the front of the reflector, the rigidity of the lamp unit itself is high, and damage to a collision object due to a collision increases. The effect of the present invention that the lamp unit is rearwardly displaced or rotated by the impact of the collision to alleviate the impact is great.

  The best mode for carrying out the vehicle headlamp of the present invention will be described below with reference to the drawings. In the illustrated best mode, the present invention is applied to an automotive headlamp.

  1 to 5 show a first best mode, and FIG. 1 is a schematic longitudinal sectional view of an automotive headlamp 10. First, the outline of the automotive headlamp 10 will be described with reference to FIG.

  A front opening of the lamp housing 20 having a container shape opening toward the front is closed by a transparent cover 30. The lamp housing 20 and the cover 30 define a lamp chamber 11 that is a space in which the lamp unit 40 is disposed.

  The cover 30 defines the front end of the lamp chamber 11 and prevents dust and rain water from entering the lamp chamber 11 and constitutes the appearance. The cover 30 efficiently transmits the light beam projected from the lamp unit 40 forward. It consists of the material and color to be made. Glass or synthetic resin can be used as the material of the cover 30, but synthetic resin is preferable in view of ease of deformation at the time of collision. Further, in terms of shape, for example, it is preferable to form the thin film as it goes upward and to be easily elastically deformed by an impact at the time of collision.

  In the automotive headlamp 10, the cover 30 has a lower edge 31 that protrudes substantially rearward from the lower edge, and gradually displaces backward in a curved shape from the front edge of the lower edge 31 upward. The degree of curvature is increased near the upper end. An embedded piece 32 protruding rearward is formed at the rear end of the upper end portion and the lower edge portion, and an abutting piece 33 protruding outward is formed adjacent to the front end of the embedded piece 32. . The embedded piece 32 and the abutting piece 33 are formed over the entire periphery of the rear end portion of the cover 30.

  A mounting groove 21 that opens forward is formed at the opening edge of the front end of the lamp housing 20, and the mounting piece 32 of the cover 30 is moved until the abutting piece 33 contacts the front end of the mounting groove 21. In this state, the cover 30 is attached to the lamp housing 20.

  The lamp unit 40 includes a reflector 42 that supports a light source 41, a convex lens 43 that projects light of the light source 41 reflected by the reflector 42 forward, and a front portion of the reflector 42 that supports the convex lens 43. And a lens holder 44 that supports the front of 42 so as to close it.

  As the light source 41, a discharge lamp is used, but an incandescent lamp such as a halogen lamp may be used. The reflector 42 includes a reflecting surface 42a having a light collecting property such as an elliptical surface or a parabolic elliptical surface, and reflects the light from the light source 41 so as to focus it on a predetermined point or region. Further, brackets 42b and 42c are provided at the front end of the reflector 42 so as to protrude upward or downward, respectively.

  The convex lens 43 is formed in a substantially hemispherical shape having a flat back surface and a convex front surface, and its rear focal point (not shown) is located at or near the condensing point or condensing region of the reflector 42. Yes. Therefore, the convex lens 43 projects the light of the light source 41 condensed at the condensing point or the condensing region by the reflecting surface 42a of the reflector 42 to the front.

  The lamp unit 40 described above is a so-called projection lamp unit. However, the lamp unit in the automotive headlamp of the present invention is not limited to the projection lamp unit. For example, an incandescent lamp is placed at a substantially focal position of a parabolic reflector. It may be a lamp unit of another form such as a parallel light projection lamp unit in which a light source is arranged.

  The lamp unit 40 is supported on the lamp housing 20 by an aiming mechanism 50 so as to be tiltable. The aiming mechanism 50 includes an aiming fulcrum 51 that constitutes a lower tilt fulcrum of the lamp unit 40, an aiming screw 52 that is rotatably supported by the lamp housing 20 and extends forward, and an upper side of the reflector 42. A synthetic resin bearing 53 is supported by the provided bracket 42b and the aiming screw 52 is screwed together and moves in the front-rear direction along the aiming screw 52 according to the rotation of the aiming screw 52. The

  The aiming fulcrum 51 is configured such that a receiving body 51b supported by a bracket 42c on the lower side of the lamp unit 40 is rotatably supported at a front end of a fulcrum shaft 51a protruding forward from the rear portion of the lamp housing 20. In other words, a spherical body (not shown) formed at the front end of the fulcrum shaft 51a is fitted in a spherical state (not shown) formed in the receiving body 51b in a rotatable state.

  The aiming screw 52 is rotatably supported on the rear wall 22 of the lamp housing 20, and the rear end portion 52 a of the aiming screw 52 is exposed on the rear surface of the rear wall 22. The rear end portion 52a of the aiming screw 52 is formed in a hexagonal nut shape, for example, and is formed so as to be rotatable from the rear side of the lamp housing 20. The aiming screw 52 only needs to be operable from the rear side of the lamp housing 20, and for this purpose, the rear end portion 52a does not have to be a hexagonal nut shape, and can be rotated by, for example, the tip of a plus driver. It may be formed in an appropriate shape or structure, such as having such a gear. Further, at least a front end portion of the aiming screw 52 is formed in a screw shaft portion 52b having a screw groove.

  As shown in FIGS. 2 and 3, the bearing 53 is made of synthetic resin and includes a support portion 53a supported by the bracket 42b and a receiving portion 53b protruding upward from the support portion 53a. . The receiving portion 53b is formed in a substantially cylindrical shape, and the receiving portion 53b is formed with a screw hole 53c penetrating the whole in the front-rear direction. Further, the receiving portion 53b is formed with a notch 53e that opens to the outer peripheral surface 53d and the screw hole 53c from the front end to the rear end. Further, as can be seen from FIG. 3, the notch 53e is formed when the center Cen in the width direction of the notch 53e is the central axis Ax of the screw hole 53c, and accordingly when the aiming screw 52 is screwed into the screw hole 53c. Is positioned substantially on a vertical plane Vs passing through the central axis of the aiming screw 52 and above a horizontal plane Hs passing through the central axis of the aiming screw 52.

  The support portion 53 a of the bearing 53 is supported by an upper bracket 42 b provided on the reflector 42 of the lamp unit 40. In addition, the support means to the bracket 42b of the said support part 53a may be appropriate things, such as engagement and screwing.

  Then, the screw shaft portion 52 b of the aiming screw 52 is screwed into the screw hole 53 c of the bearing 53, whereby the portion of the bracket 42 b of the lamp unit 40 is supported by the lamp housing 20 via the aiming screw 52. When the aiming screw 52 is rotated, the screw shaft portion 52b is screwed into the bearing 53 or unscrewed depending on the direction of rotation. As a result, the bearing 53 is moved back and forth along the aiming screw 52. When the bearing 53 moves rearward, the lamp unit 40 turns upward with the aiming fulcrum 51 as a turning fulcrum, and when the bearing 53 moves forward, the lamp unit 40 turns the aiming fulcrum 51 around the turning fulcrum. And turn downward.

  An extension 60 is disposed inside the cover 30, that is, between the cover 30 and the lamp unit 40, and the aiming mechanism 50 is shielded from the front by the extension 60. The extension 60 may be supported by the lamp housing 20 or may be supported by the cover 30. However, if the extension 60 is supported by the cover 30, the extension 60 and the cover 30 are moved together when the cover 30 is moved rearward. Easy to move. The extension 60 is preferably formed with a fragile portion for facilitating deformation.

  Next, an operation when an object 70 such as a pedestrian collides with the automobile headlamp 10 from the front will be described.

  As shown in FIG. 4, when an object 70 such as a pedestrian collides with the vehicle headlamp 10 so as to push the cover 30 substantially rearward (see arrow Fr in FIG. 4), the impact force causes the cover to move. A part 34 of 30 is deformed and moves backward. Then, the extension 60 is moved rearward together with the cover 30 by being pushed by the part 34 of the cover 30 which is deformed and moved rearward. When the extension 60 moves rearward, the extension 60 collides with the front end of the lamp unit 40, for example, the convex lens 43, thereby applying a force that rotates the lamp unit 40 in the upward direction. The screwing of the screw shaft portion 52b of the aiming screw 52 and the screw hole 53c of the bearing 53 works to stop the bearing 53 at the current position, but the receiving portion 53b of the bearing 53 has a circumferential direction of the aiming screw 52 by the notch portion 53e. Therefore, when a strong force is applied to the bearing 53 from the front, the interval (hereinafter simply referred to as “width”) W1 in the direction perpendicular to the axial direction of the aiming screw 52 of the notch 53e is increased. Then, the receiving portion 53b opens (see the arrow Opn in FIG. 3), the screw shaft portion 52b and the screw hole 53c are disengaged, and the bearing 53 moves rearward along the aiming screw 52 (see the arrow R in FIG. 4). Moving.

  As described above, when the bearing 53 moves rearward, the portion of the lamp unit 40 supported by the bearing 53 moves rearward. Therefore, the impact acting on the object 70 due to the collision is reduced, and damage to the object 70 is reduced.

  Further, as shown in FIG. 5, the object 70 may collide so as to push the cover 30 rearward and downward (see arrow Fd in FIG. 5). Due to such a collision, a part 35 of the cover 30 is deformed to deform the extension 60, and the extension 60 hits the front end portion of the lamp unit 40 substantially downward. As a result, a force to move the lamp unit 40 substantially downward is applied, and accordingly, a force to move the bearing 53 substantially downward is also applied. Then, as described above, the receiving portion 53b opens (see the arrow Opn in FIG. 3) so that the width W1 of the cutout portion 53e is larger than that in the case of FIG. 4, and the receiving portion 53b is dropped downward from the aiming screw 52. To do. As a result, there is no support for the upper part of the lamp unit 40, and the lamp unit 40 moves substantially downward (see arrow D in FIG. 5). Therefore, the impact acting on the object 70 due to the collision is reduced, and damage to the object 70 is reduced.

  Note that, depending on the situation of the collision, the movement shown in FIG. 4 and the movement shown in FIG.

  FIG. 6 shows the second best mode. Since the second best mode is different from the first best mode only in the shape of the bearing, the description of parts other than the bearing will be omitted. In addition, since the other best forms below the third best form below also differ from the first best form only in the shape of the bearing, description of parts other than the bearing will be omitted.

  The bearing 153 is made of synthetic resin, and includes a support portion 153a supported by the bracket 42b and a receiving portion 153b protruding upward from the support portion 153a. The receiving portion 153b is formed in a substantially cylindrical shape, and the receiving portion 153b is formed with a screw hole 153c penetrating the whole in the front-rear direction. Further, the receiving portion 153b is formed with a notch 153e that opens to the outer peripheral surface 153d and the screw hole 153c from the front end to the rear end. Further, as can be seen from FIG. 6, the notch 153e is formed when the center Cen in the width direction of the notch 153e is the central axis Ax of the screw hole 153c, and accordingly when the aiming screw 52 is screwed into the screw hole 153c. Is positioned substantially on a vertical plane Vs passing through the central axis of the aiming screw 52 and above a horizontal plane Hs passing through the central axis of the aiming screw 52.

  However, the bearing 153 according to the second best mode is the first best in that the width W2 of the notch 153e is narrower than the width W1 of the notch 53e of the bearing 53 according to the first best mode. It differs from the bearing 53 by a form. The width (hereinafter simply referred to as “width”) W <b> 2 of the notch 153 e in the direction orthogonal to the axial direction of the aiming screw 52 is equal to or less than the radius of the aiming screw 52. For this reason, there is no possibility that the bearing 153 will fall off the aiming screw 52 at the normal time, that is, in a state where no special load is applied to the bearing 153 due to a collision or the like.

  Even in the second best mode, the receiving portion 153b of the bearing 153 is easily opened in the circumferential direction of the aiming screw 52 by the notch portion 153e. Therefore, when a strong force is applied to the bearing 153 from the front, The receiving portion 153b is opened so that the width W2 of the portion 153e is increased, the screw shaft portion 152b and the screw hole 153c are disengaged, and the bearing 153 moves rearward along the aiming screw 52.

  Further, when a force for moving substantially downward is applied to the bearing 153, as described above, the receiving portion 153b is opened so that the width W2 of the notch 153e becomes larger than the case where a backward force is applied. The receiving portion 153b is dropped from the aiming screw 52 downward.

  FIG. 7 shows a third best mode.

  The bearing 253 is made of synthetic resin, and includes a support portion 253a supported by the bracket 42b and a receiving portion 253b protruding upward from the support portion 253a. The receiving portion 253b is formed in a substantially cylindrical shape, and the receiving portion 253b is formed with a screw hole 253c penetrating the whole in the front-rear direction. Further, the receiving portion 253b is formed with a notch 253e that opens to the outer peripheral surface 253d and the screw hole 253c so as to reach the rear end from the front end. Further, as can be seen in FIG. 7, the notch 253e is formed when the center Cen in the width direction of the notch 253e is the central axis Ax of the screw hole 253c, and accordingly when the aiming screw 52 is screwed into the screw hole 253c. Is offset from the vertical plane Vs passing through the central axis of the aiming screw 52 in the left-right direction (to the right in FIG. 7), and is positioned above the horizontal plane Hs passing through the central axis of the aiming screw 52. Yes.

  In the bearing 253, the center Cen in the width direction of the notch 253e is offset in the left-right direction from the vertical plane Vs passing through the central axis of the aiming screw 52, so that the bearing 253 moves downward due to the weight of the lamp unit 40. Even when a load is applied, the force for opening the bearing 253 from the notch 253e due to the load is small, and the bearing 253 does not easily fall off the aiming screw 52 in a normal time when a strong impact due to a collision or the like is not applied.

  Even in the third best mode, the receiving portion 253b of the bearing 253 is easily opened in the circumferential direction of the aiming screw 52 by the notch portion 253e. Therefore, when a strong force is applied to the bearing 253 from the front, The receiving portion 253b opens so that the interval W3 in the direction orthogonal to the axial direction of the aiming screw 52 of the portion 253e (hereinafter simply referred to as “width”) is increased, and the screw shaft portion 52b and the screw hole 253c are screwed together. The bearing 253 moves rearward along the aiming screw 52.

  Further, when a force for moving substantially downward is applied to the bearing 253, as described above, the receiving portion 253b is opened so that the width W3 of the notch 253e is larger than that when a backward force is applied. The receiving portion 253b falls off the aiming screw 52 downward.

  FIG. 8 shows a fourth best mode.

  The bearing 353 is made of synthetic resin and includes a support portion 353a supported by the bracket 42b and a receiving portion 353b protruding upward from the support portion 353a. The receiving portion 353b is formed in a substantially cylindrical shape, and the receiving portion 353b is formed with a screw hole 353c penetrating the whole in the front-rear direction. Further, the receiving portion 353b is formed with a notch 353e that opens to the outer peripheral surface 353d and the screw hole 353c so as to reach the rear end from the front end. Further, as can be seen from FIG. 8, the notch 353e is formed when the center Cen in the width direction of the notch 353e is the central axis Ax of the screw hole 353c, and accordingly when the aiming screw 52 is screwed into the screw hole 353c. Is offset from the vertical plane Vs passing through the central axis of the aiming screw 52 in the left-right direction (to the right in FIG. 8), and is positioned above the horizontal plane Hs passing through the central axis of the aiming screw 52. Yes.

  In the bearing 353, the center Cen in the width direction of the notch 353 e is offset in the left-right direction from the vertical plane Vs passing through the central axis of the aiming screw 52, so that the bearing 353 moves downward due to the weight of the lamp unit 40. Even when a load is applied, the force to open the bearing 353 from the notch 353e due to the load is small, and the bearing 353 does not easily fall off the aiming screw 52 in a normal time when a strong impact due to a collision or the like is not applied. Further, the interval W4 in the direction orthogonal to the axial direction of the aiming screw 52 (hereinafter simply referred to as “width”) W4 of the notch 353e of the bearing 353 according to the fourth best mode is the same as that of the bearing 253 according to the third best mode. It is narrower than the width W3 of the notch 253e. The width W4 of the notch 353e is equal to or less than the radius of the aiming screw 52. For this reason, the bearing 353 is unlikely to fall off the aiming screw 52 at normal times, that is, in a state where a special load due to a collision or the like is not applied to the bearing.

  Even in the fourth best mode, the receiving portion 353b of the bearing 353 is easily opened in the circumferential direction of the aiming screw 52 by the notch portion 353e. Therefore, when a strong force is applied to the bearing 353 from the front, The receiving portion 353b is opened so that the width W4 of the portion 353e is increased, the screw shaft portion 52b and the screw hole 353c are disengaged, and the bearing 353 moves rearward along the aiming screw 52.

  Further, when a force for moving the bearing 353 substantially downward is applied, as described above, the receiving portion 353b is opened so that the width W4 of the notch portion 353e is larger than when a backward force is applied, The receiving portion 353b falls off the aiming screw 52 downward.

  9 and 10 show a fifth best mode.

  The bearing 453 is formed of a synthetic resin and includes a support portion 453a supported by the bracket 42b and a receiving portion 453b protruding upward from the support portion 453a. The receiving portion 453b is formed in a substantially cylindrical shape, and the receiving portion 453b is formed with a screw hole 453c penetrating the whole in the front-rear direction. Further, the receiving portion 453b is formed with four notches 453e formed from the front end to the front end of the receiving portion 453b and opening to the outer peripheral surface 453d and the screw holes 453c at substantially equal intervals in the circumferential direction. Is formed. The receiving part 453b is separated into four parts by a notch part 453e except for the rear end part 453f. The screw groove of the screw hole 453c is formed in a portion excluding the rear end portion 453f, and the inner diameter of the rear end portion 453f is substantially the same as or larger than the inner diameter of the valley portion of the screw hole 453c. Is formed.

  The center Cen in the width direction of the two notches 453e formed in the upper part of the notches 453e is the central axis Ax of the screw hole 453c. Therefore, when the aiming screw 52 is screwed into the screw hole 453c. Are offset in the left-right direction from the vertical plane Vs passing through the central axis of the aiming screw 52. Further, an interval (hereinafter simply referred to as “width”) W5 in the direction orthogonal to the axial direction of the aiming screw 52 of the notch 453e is equal to or less than the radius of the aiming screw 52.

  Even in the fifth best mode, the receiving portion 453b of the bearing 453 is easily opened in the circumferential direction of the aiming screw 52 by the four cutout portions 453e, so that a strong force is applied to the bearing 453 from the front. Then, the receiving portion 453b is opened so that the width W5 of the notch portion 453e is increased, the screw shaft portion 52b and the screw hole 453c are disengaged, and the bearing 453 moves rearward along the aiming screw 52.

  Further, when a force for moving substantially downward is applied to the bearing 453, as described above, the receiving portion 453b is opened so that the width W5 of the notch portion 453e is larger than that when a backward force is applied, In addition, the rear end portion 453f of the receiving portion 453b is broken by a strong impact, and the receiving portion 453b falls off the aiming screw 52 downward.

  In the case of forming a plurality of notches 453e in the receiving portion 453b of the bearing 453 as in the fifth best mode, a portion where the notch 453e is not formed is required like the rear end portion 453f. Further, the number of the notches 453e is not limited to four, and may be more than four or less than four.

  As shown in FIG. 1, the lamp unit includes a reflector 42 that supports the light source 41, a convex lens 43 that projects the light of the light source 41 reflected by the reflector 42 forward, and a front portion of the reflector 42. When the projection lamp unit 40 is provided with a lens holder 44 that is supported by the lens holder 44 and supports the convex lens 43 so as to close the front of the reflector 42, the effect of applying the present invention becomes more significant. In other words, the projection lamp unit 40 described above has a strong structure such that an aluminum die casting is used for the reflector 42 due to its structure. Therefore, the lamp unit 40 itself is not easily destroyed, and the impact given to the collision object is increased. Such a change of the projection lamp unit 40 in a direction in which the projection lamp unit 40 easily avoids an impact at the time of collision is suitable for alleviating damage to the collision object.

  In the description of the best mode, an example in which the tilting fulcrum is provided on the lower side of the lamp unit and the bearing is provided on the upper side of the lamp unit is shown. However, the tilting fulcrum is provided on the upper side of the lamp unit and the bearing is provided on the lamp unit. It is good also as a structure provided in the lower side.

  Furthermore, the shapes and structures of the respective parts shown in the above-described best mode are merely examples of implementations in carrying out the present invention, and these limit the technical scope of the present invention. It should not be interpreted.

The drawings show a first best mode in which the vehicular headlamp of the present invention is applied to a vehicular headlamp, and this figure is a schematic vertical sectional view in a normal state. A bearing is shown with FIG. 3, and this figure is an enlarged perspective view. It is an enlarged front view. It is a schematic longitudinal cross-sectional view which shows the state of the headlamp for motor vehicles when the impact toward substantially back is applied. . It is a schematic longitudinal cross-sectional view which shows the state of the headlamp for motor vehicles when the impact toward a substantially downward direction is applied. . It is an enlarged front view of the bearing concerning the 2nd best form. It is an enlarged front view of the bearing concerning the 3rd best form. It is an enlarged front view of the bearing concerning the 4th best form. FIG. 10 shows the fifth best mode together with FIG. 10, and is an enlarged perspective view of the bearing. It is an enlarged front view of a bearing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Automotive headlamp (vehicle headlamp), 11 ... Lamp chamber, 20 ... Lamp housing, 30 ... Cover, 40 ... Lamp unit, 41 ... Light source, 42 ... Reflector, 42b ... Bracket, 43 ... Convex lens, 44 ... Lens holder, 50 ... Aiming mechanism, 51 ... Aiming fulcrum, 52 ... Aiming screw, 53 ... Bearing, 53e ... Notch, Cen ... Center in the width direction of the notch, Ax ... Center axis, Vs ... Vertical plane, Hs ... horizontal plane, W1 ... width of the notch, 153 ... bearing, 153e ... notch, Cen ... center in the width direction of the notch, Ax ... central axis, Vs ... vertical plane, Hs ... horizontal plane, W2 ... width of the notch, 253 ... Bearing, 253e ... Notch, Cen ... Center in the width direction of the notch, Ax ... Center axis, Vs ... Vertical plane, Hs ... Horizontal plane, W3 ... Width of notch, 53 ... Bearing, 353e ... Notch, Cen ... Center in the width direction of the notch, Ax ... Center axis, Vs ... Vertical plane, Hs ... Horizontal plane, W3 ... Width of notch, 453 ... Bearing, 453e ... Notch, Cen ... center in the width direction of the notch, Ax ... central axis, Vs ... vertical plane, W4 ... width of the notch

Claims (5)

A lamp unit housed in a lamp chamber defined by a lamp housing and a cover that closes the front opening of the lamp housing and having a light source; and the lamp unit interposed between the lamp housing and the lamp unit. A vehicle headlamp including an aiming mechanism that supports the unit so as to be tiltable with respect to the lamp housing;
The aiming mechanism is supported by an aiming fulcrum that constitutes a tilting fulcrum of the lamp unit, an aiming screw that is rotatably supported by the lamp housing and extends forward, and a bracket provided in the lamp unit. The aiming screw is screwed, and is composed of a synthetic resin bearing that moves in the front-rear direction along the aiming screw according to the rotation of the aiming screw,
The vehicle headlamp, wherein the bearing is formed with a notch extending in the axial direction of the aiming screw. The vehicle headlamp according to claim 1, wherein a width of the notch in a direction orthogonal to an axial direction of the aiming screw is equal to or less than a radius of the aiming screw. 3. The vehicle according to claim 1, wherein a center of the cutout portion in a direction perpendicular to the axial direction of the aiming screw is offset in a left-right direction from a vertical plane passing through the central axis of the aiming screw. Headlight. The vehicle headlamp according to any one of claims 1 to 3, wherein the notch is positioned above a horizontal plane passing through a central axis of the aiming screw. The lamp unit includes a reflector that supports a light source, a convex lens that projects the light of the light source reflected by the reflector forward, and a front portion of the reflector and the front of the reflector that is blocked. The vehicular headlamp according to any one of claims 1 to 4, wherein the vehicular headlamp is a projection lamp unit including a lens holder that supports a convex lens.

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