JP6584445B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp configured to control light distribution from a light source by an optical member.

  2. Description of the Related Art Conventionally, as a vehicular lamp configured to control light distribution from a light source by an optical member such as a lens, a configuration in which an optical member can rotate with respect to a housing is known. .

  In “Patent Document 1”, as such a vehicular lamp, an optical member is rotated around a rotation axis extending in a first direction intersecting with the front-rear direction of the lamp by an optical axis adjusting screw supported by the housing. What is configured is described.

  The optical member described in “Patent Document 1” is formed with a pair of protruding pieces extending toward the rear of the lamp at the end portion in the first direction, and formed on side surfaces of the protruding pieces facing each other. The groove portion is configured to be screwed with the optical axis adjusting screw.

Special table 2015-522929

  In the vehicular lamp described in the above-mentioned “Patent Document 1”, when assembling the vehicle lamp, it is necessary to screw the pair of projection pieces with the optical axis adjusting screw in the groove portion. For this reason, the freedom degree at the time of lamp assembly | attachment is low, and assembly workability | operativity cannot be improved.

  The present invention has been made in view of such circumstances, and in a vehicular lamp configured to control light distribution from a light source by an optical member, the optical member rotates with respect to the housing. Even if it is a case where it becomes the structure obtained, it aims at providing the lamp | ramp for vehicles which can improve the assembly workability | operativity.

  The present invention is intended to achieve the above object by devising the configurations of the optical member and the optical axis adjusting screw.

That is, the vehicular lamp according to the present invention is
In a vehicular lamp configured to control light distribution by an optical member from a light source,
A housing for rotatably supporting the optical member about a rotation axis extending in a first direction intersecting the lamp front-rear direction, and light for rotating the optical member about the rotation axis relative to the housing With an axis adjustment screw,
The optical axis adjustment screw is supported by the housing in a state of being arranged so as to extend in the lamp front-rear direction and the second direction intersecting the first direction on the lamp rear side from the rotation axis,
On the optical member, a protruding piece extending toward the rear of the lamp is formed,
On the rear end surface of the protruding piece, a groove portion that is screwed with the optical axis adjusting screw is formed ,
When the optical member is rotated by a predetermined angle or more from the rotation reference position on the optical axis adjustment screw, an over-rotation restricting portion is formed which contacts the rear end portion of the protruding piece and restricts further rotation. Has been
A separation preventing portion for preventing the groove portion of the protruding piece from being disengaged from the screwed state with the optical axis adjustment screw due to bending deformation of the optical axis adjustment screw is provided on the housing. Formed in a positional relationship close to the outer peripheral surface of the part,
The dimension of the gap between the separation preventing part and the outer peripheral surface of the over-rotation restricting part is smaller than the dimension of the effective tooth in the threaded state of the groove part of the protruding piece and the screw part for adjusting the optical axis. It is characterized by being set .

  The type of the vehicular lamp according to the present invention is not particularly limited, and, for example, a fog lamp, a head lamp, or the like can be employed.

  The type of the “light source” is not particularly limited, and for example, a light emitting element such as a light emitting diode or a laser diode, a light source bulb, or the like can be employed.

  The “optical member” is not particularly limited as long as it is a member capable of controlling light distribution from the light source, and for example, a lens, a reflector, a shade, or the like can be adopted. . In this case, the “optical member” may be formed integrally with the main body portion having the light distribution control function and the protruding piece, or may be constituted separately.

  As long as the “first direction” is a direction that intersects the lamp front-rear direction, the specific direction is not particularly limited, and for example, a vehicle width direction, a vertical direction, or the like can be adopted.

  The above-mentioned “second direction” is not particularly limited as long as it is a direction crossing the lamp front-rear direction and the first direction.

  As long as the “projection piece” is formed so as to extend from the optical member toward the rear of the lamp, the specific arrangement and shape thereof are not particularly limited.

  In the vehicular lamp according to the present invention, the optical axis adjusting screw for rotating the optical member around the rotation axis extending in the first direction intersecting the lamp front-rear direction with respect to the housing is more than the rotation axis. Although it is the structure supported by the housing in the state arrange | positioned so that it may extend in the 2nd direction which cross | intersects a lamp front-back direction and a 1st direction in the back side, the protrusion piece extended toward a lamp back is formed in an optical member. Since the groove is formed on the rear end surface of the projection piece so as to be screwed with the optical axis adjusting screw, the following effects can be obtained.

  That is, since the optical member is configured to be screwed with the optical axis adjusting screw in the groove formed on the rear end surface rather than the side surface of the protruding piece, the optical member is configured as a conventional pair. Even if it is not set as the structure provided with the protrusion piece, the screwing state of the groove part of an protrusion piece and an optical axis adjustment screw can be maintained.

  Therefore, when the lamp is assembled, it is only necessary to screw the single projecting piece with the optical axis adjusting screw in the groove portion, thereby increasing the degree of freedom in assembling the lamp. Workability can be improved.

  As described above, according to the present invention, in the vehicular lamp configured to control light distribution from the light source by the optical member, the optical member is configured to be rotatable with respect to the housing. However, the assembling workability can be improved.

  Further, as in the present invention, by unifying the protruding pieces, the optical member can be reduced in weight and space.

  In the above configuration, if the screw portion that is screwed with the groove portion of the protruding piece is configured by the hourglass worm as the optical axis adjusting screw, the screwed state between the groove portion of the protruding piece and the optical axis adjusting screw can be easily achieved. Can be maintained. And thereby, it can suppress effectively that the groove part of a projection piece detaches | leaves from a screwing state with an optical axis adjustment screw by vehicle vibration etc.

  In this case, the first direction is set in the horizontal direction and the second direction is set in the vertical direction, and the screw portion of the optical axis adjustment screw is substantially the upper half of the hourglass worm. The following operational effects can be obtained.

  In other words, a rotation moment is generated in the optical member so as to rotate the projection piece upward around the rotation axis, and therefore, in the threaded portion between the groove portion of the projection piece and the screw portion of the optical axis adjustment screw. A force that presses the optical axis adjusting screw upward acts from the protruding piece. Therefore, if the screw portion of the optical axis adjusting screw is configured by the substantially upper half portion of the hourglass worm, the pressing force from the protruding piece can be received efficiently, whereby the groove portion of the protruding piece and the optical axis can be received. The screwed state with the adjusting screw can be further ensured.

  In this case, the “substantially upper half of the hourglass worm” refers to the distance from the uppermost edge of the hourglass worm to the hourglass shape with the most constricted portion (ie, the portion having the smallest diameter) as a reference. This means that it is longer than the distance to the lower edge of the worm.

  In the above configuration, if the groove portion of the protruding piece is formed so as to extend along an arc centered on the axis extending in the second direction, the groove portion of the protruding piece and the optical axis adjusting screw are screwed together. The range can be expanded, and thereby the screwed state between the groove of the projection piece and the optical axis adjusting screw can be further ensured. Moreover, it can suppress more effectively that the groove part of a projection piece detaches | leaves from the screwing state with an optical axis adjustment screw by vehicle vibration etc.

  In the above configuration, when the optical member is rotated by a predetermined angle or more from the rotation reference position by the optical axis adjustment screw, an over-rotation restricting portion that contacts the rear end portion of the protruding piece and restricts the over-rotation is formed With this configuration, it is possible to prevent the groove portion of the protruding piece from being disengaged from the screwed state with the optical axis adjusting screw due to unnecessary optical axis adjustment.

  In the above configuration, the housing includes a separation preventing portion for preventing the groove portion of the projecting piece from being disengaged from the screwed state with the optical axis adjustment screw due to the bending deformation of the optical axis adjustment screw. If the configuration is formed in a positional relationship that is close or in contact, the screwed state between the groove portion of the projection piece and the optical axis adjustment screw can be further ensured. It is possible to more effectively suppress the groove portion from being detached from the screwed state with the optical axis adjusting screw.

Plan sectional drawing which shows the vehicle lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. Detailed view of the main part of FIG. Detailed view of the main part of FIG. Detailed view of the main part of FIG. The same figure as FIG. 3 which shows the 1st and 2nd modification of the said embodiment. The figure similar to FIG. 4 which shows the 3rd modification of the said embodiment. Detailed view of the main part of FIG. The same figure as FIG. 2 which shows the 4th modification of the said embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan sectional view showing a vehicular lamp 10 according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in these drawings, a vehicular lamp 10 according to the present embodiment is a fog lamp provided at a right front end portion of a vehicle, and includes a lamp body 12 as a housing and a through shape attached to a front end opening portion thereof. In the lamp chamber formed by the translucent cover 14, a light source 20 and an optical member 30 for controlling the light distribution of the light from the light source 20 are accommodated.

  As for the vehicular lamp 10, in FIG. 1, the direction indicated by X is "front" (also "front" as a vehicle), and the direction indicated by Y is "left direction" (as a vehicle) orthogonal to "front". Is also “leftward” but “rightward” in front view of the lamp.

  The light source 20 is a white light-emitting diode having a horizontally-long rectangular light emitting surface 20a extending in the vehicle width direction (that is, the left-right direction), and in a state where the light emitting surface 20a is directed in the front direction of the lamp (that is, the front of the vehicle). It is supported on the rear wall 12c of the lamp body 12 through a functioning substrate 22.

  The optical member 30 includes a lens 32 that controls deflection of light emitted from the light source 20 and a lens holder 34 that supports the lens 32. Both the lens 32 and the lens holder 34 are transparent resin members, and are integrated by welding, fitting, or the like.

  The lens 32 is disposed on the front side of the light source 20, and its optical axis Ax extends in the front-rear direction of the lamp near the lower side of the light emitting surface 20a. The lens 32 has a front surface formed in a convex shape and a rear surface formed in a flat shape, and is disposed in a state inclined toward the rear side of the lamp from the left end portion toward the right end portion. The lens 32 emits the light emitted from the light source 20 to the front of the lamp as light that is slightly downward and greatly expands in the vehicle width direction, thereby forming a fog lamp light distribution pattern.

  The lens holder 34 is configured as a ring-shaped member that supports the outer peripheral edge of the lens 32. The lens holder 34 has a main body portion 34A inclined from the left end portion toward the right end portion along the rear surface of the lens 32 toward the rear side of the lamp, and a pair of leg portions 34L and 34R are provided on both left and right side portions. Is formed.

  The optical member 30 is rotatable about a rotation axis Ax1 extending in the vehicle width direction (that is, a horizontal direction orthogonal to the optical axis Ax) with respect to the lamp body 12 in the pair of left and right legs 34L and 34R. It is supported by.

  A specific configuration for realizing this is as follows.

  That is, the pair of left and right leg portions 34L and 34R are formed so as to protrude in the left and right sides of the main body portion 34A of the lens holder 34 in a plan view and extend in a plate shape toward the rear of the lamp. . On the outer side surface of the rear end portion of each leg portion 34L, 34R (that is, the side surface located on the side opposite to the optical axis Ax), fulcrum projections 34La, 34Ra projecting outward on the rotation axis Ax1 are formed. Yes.

  Each of the pair of left and right leg portions 34L and 34R is formed to extend in a tongue shape from the main body portion 34A of the lens holder 34 toward the rear of the lamp in a side view. At this time, as the main body portion 34A of the lens holder 34 is inclined from the left end portion toward the right end portion toward the rear side of the lamp, the left leg portion 34L is longer than the right leg portion 34R. Is formed. Each of the pair of left and right fulcrum protrusions 34La and 34Ra is formed in a truncated cone shape and its base end is formed in a columnar shape, but its base end is formed from the right fulcrum protrusion 34Ra. Also, the left fulcrum protrusion 34La is longer.

  The optical member 30 is inserted into a recess 12a1 formed on the inner surface of the right wall 12a of the lamp body 12 at the fulcrum protrusion 34Ra of the right leg 34R of the lens holder 34, and the left leg thereof. The fulcrum protrusion 34La of 34L is inserted into a through hole 12b1 formed in the left side wall 12b of the lamp body 12, so that the fulcrum protrusion 34La is supported so as to be rotatable about the rotation axis Ax1 with respect to the lamp body 12. ing. A plug member 16 for closing the through hole 12b is mounted on the left side wall 12b of the lamp body 12 from the outer surface side.

  3 is a detailed view of the main part of FIG. 1, and FIG. 4 is a detailed view of the main part of FIG.

  As shown in these drawings, the lamp body 12 is configured as an overhanging portion 12d whose left rear end portion projects from the rear wall 12c to the rear side of the lamp. An optical axis adjusting screw 40 for rotating the optical member 30 about the rotation axis Ax1 is supported on the lower wall portion of the projecting portion 12d so as to be rotatable about the axis Ax2 extending in the vertical direction.

  The optical axis adjusting screw 40 is a resin member and is formed such that its diameter gradually decreases from the lower end portion toward the upper end portion, and a screw portion 40a is formed at the upper end portion. Yes. The screw portion 40a is a drum-shaped worm, and is formed such that the diameter at the same height as the rotation axis Ax1 and the optical axis Ax is the smallest, and the diameter gradually increases toward the upper and lower end edges. At this time, the screw portion 40a is formed so that its diameter increases along an arc A (see FIG. 4) centered on the rotation axis Ax1.

  The optical axis adjusting screw 40 is supported by the lamp body 12 at a shaft portion 40b located in the middle with the screw portion 40a exposed in the lamp chamber and the lower end portion exposed to the external space. ing.

  A driver insertion hole 40c is formed at the lower end of the optical axis adjustment screw 40, and the optical axis adjustment screw 40 is moved around the axis Ax2 by operating by inserting a driver (not shown) into the driver insertion hole 40c. It can be rotated. An O-ring 42 is attached to the shaft portion 40b of the optical axis adjusting screw 40 to ensure airtightness in the lamp chamber.

  On the left side of the lens holder 34, a protruding piece 34B extending toward the rear of the lamp is formed.

  The protruding piece 34B is formed so as to extend in a plate shape along a vertical plane parallel to the optical axis Ax in the vicinity of the right side of the left leg portion 34L. At this time, the protruding piece 34B is formed so as to gradually taper toward the rear of the lamp around the same height position as the optical axis Ax in a side view.

  The rear end surface of the projecting piece 34B is located on the rear side of the lamp with respect to the rotation axis Ax1 (near the front of the axis Ax2), and a plurality of screws (for screwing with the optical axis adjusting screw 40) are connected to the rear end surface ( Specifically, two groove portions 34Ba are formed. The plurality of groove portions 34Ba are located between a plurality of (specifically three) protrusions formed on the rear end surface of the projecting piece 34B, and the plurality of protrusions on the rear end surface. The portions located on both the upper and lower sides are formed in a vertical plane at substantially the same position as the bottom of each groove 34Ba.

  When the optical member 30 is at the rotation reference position that is the reference position for the optical axis adjustment, the plurality of groove portions 34Ba are centered on the same height position as the optical axis Ax, and the screw portion 40a of the optical axis adjustment screw 40 It is designed to be screwed together.

  FIG. 5 is a detailed view of the main part of FIG.

  As shown in the figure, each groove portion 34Ba is formed in a substantially wedge-shaped vertical cross-sectional shape so as to extend linearly in the vehicle width direction, and the vertical width thereof is the pitch of the screw portion 40a of the optical axis adjusting screw 40. Is set to the same value.

  Over-rotation restricting portions 40d and 40e having diameters larger than the diameters of the upper and lower end edges of the screw portion 40a are formed on both upper and lower sides of the screw portion 40a in the optical axis adjusting screw 40. The upper over-rotation restricting portion 40d is formed in a disc shape, and the lower over-rotation restricting portion 40e is formed in a truncated cone shape.

  In each of the over-rotation restricting portions 40d and 40e, the optical member 30 exceeds the normal optical axis adjustment angle range from the rotation reference position (that is, an angle range indicated by a two-dot chain line in the figure (for example, a range of about ± 4 °)). When it rotates more than a predetermined angle (for example, about ± 11 °) (that is, when it rotates to the position indicated by the broken line in the figure), it comes into contact with the upper end edge or lower end edge of the rear end portion of the projection piece 34B. The above rotation is regulated.

  The groove 34Ba of the protruding piece 34B is detached from the screwed state with the threaded portion 40a of the optical axis adjusting screw 40 due to the bending deformation of the optical axis adjusting screw 40 on the inner surface upper part of the rear wall portion in the projecting portion 12d of the lamp body 12. The detachment preventing portion 12d1 for preventing the protrusion is formed so as to protrude in a positional relationship close to the outer peripheral surface of the upper overturning restricting portion 40d.

  Specifically, the separation preventing portion 12d1 has a gap C between the separation preventing portion 12b2 and the outer peripheral surface of the upper overturning restricting portion 40d so that the groove 34Ba of the protruding piece 34B and the optical axis adjusting screw 40 It is formed to have a value (for example, a value of about C = 0.2 to 0.6 × D) smaller than the dimension D of the effective tooth in the screwed state with the screw portion 40a.

  The function of the separation preventing unit 12d1 will be described as follows.

  That is, since the relatively heavy lens 32 is positioned in front of the rotation axis Ax1, the optical member 30 has a rotational moment (FIG. 5) for rotating the protruding piece 34B upward. (Rotational moment indicated by the middle arrow) occurs. For this reason, in the screw portion 40a of the optical axis adjusting screw 40 that is screwed with the groove portion 34Ba of the protruding piece 34B, the downward inclined surface comes into contact with the groove portion 34Ba of the protruding piece 34B, and the upward pressing force (arrow in the figure). (Pressing force indicated by).

  As a result, the upper end of the optical axis adjusting screw 40 tends to bend toward the rear side of the lamp as indicated by a two-dot chain line in the figure. Further deformation of the protrusion 34B is restricted by contact with the groove 34B, thereby preventing the groove 34Ba of the projection piece 34B from being detached from the screwed state with the screw portion 40a.

  Next, the effect of this embodiment is demonstrated.

  The vehicular lamp 10 according to the present embodiment rotates the optical member 30 about a rotation axis Ax1 extending in the vehicle width direction (a first direction intersecting the lamp front-rear direction) with respect to the lamp body 12 (housing). The optical axis adjusting screw 40 is supported by the lamp body 12 in a state in which the optical axis adjusting screw 40 extends in the vertical direction (the lamp front-rear direction and the second direction intersecting the first direction) behind the rotation axis Ax1. However, the optical member 30 is formed with a projection piece 34B extending toward the rear of the lamp, and the rear end surface of the projection piece 34B is screwed with the screw portion 40a of the optical axis adjustment screw 40. Since the groove 34Ba is formed, the following effects can be obtained.

  That is, the optical member 30 is configured to be screwed with the screw portion 40a of the optical axis adjusting screw 40 in the groove portion 34Ba formed on the rear end surface instead of the side surface of the protruding piece 34B. As described above, the screwed state between the groove portion 34Ba of the protruding piece 34B and the screw portion 40a of the optical axis adjusting screw 40 can be maintained without using a configuration including a pair of protruding pieces as in the prior art.

  Therefore, when the lamp is assembled, it is only necessary to screw the single projecting piece 34B with the optical axis adjusting screw 40 in the groove 34Ba, thereby increasing the degree of freedom in assembling the lamp. Ten assembling workability can be improved.

  As described above, according to the present embodiment, in the vehicular lamp 10 configured to control light distribution from the light source 20 by the optical member 30, the optical member 30 can rotate with respect to the lamp body 12. Even in this case, the assembly workability can be improved.

  Further, as in the present embodiment, the optical member 30 can be reduced in weight and space by unifying the protruding pieces 34B.

  In addition, in this embodiment, since the screw portion 40a in which the optical axis adjusting screw 40 is screwed with the groove portion 34Ba of the protruding piece 34B is formed of a drum worm, the screw between the protruding piece 34B and the optical axis adjusting screw 40 is screwed. The combined state can be easily maintained. As a result, it is possible to effectively prevent the groove 34Ba of the projection piece 34B from being detached from the screwed state with the screw portion 40a of the optical axis adjusting screw 40 due to vehicle vibration or the like.

  Further, in this embodiment, when the optical member 30 is rotated by the optical axis adjusting screw 40 by a predetermined angle or more from the rotation reference position, it is in contact with the rear end portion of the projecting piece 34B to restrict excessive rotation. Since the rotation restricting portions 40d and 40e are formed, it is possible to prevent the groove portion 34Ba of the protruding piece 34B from being disengaged from the screwed state with the screw portion 40a of the optical axis adjusting screw 40 due to unnecessary optical axis adjustment. Can be prevented.

  Further, in the present embodiment, the groove 34Ba of the projection piece 34B is detached from the threaded state with the threaded portion 40a of the optical axis adjusting screw 40 by the bending deformation of the optical axis adjusting screw 40 on the projecting portion 12d of the lamp body 12. Since the separation preventing portion 12d1 for preventing the protrusion is formed in a positional relationship close to the optical axis adjustment screw 40, the groove portion 34Ba of the protrusion piece 34B and the screw portion 40a of the optical axis adjustment screw 40 are screwed together. Thus, the state can be further ensured, and thereby, it is further effective that the groove 34Ba of the projection piece 34B is detached from the screwed state with the screw portion 40a of the optical axis adjusting screw 40 due to vehicle vibration or the like. Can be suppressed.

  In the above-described embodiment, it has been described that the two groove portions 34Ba are formed on the rear end surface of the protruding piece 34B. However, a configuration in which one or three or more groove portions 34Ba are formed is also possible. .

  In the above-described embodiment, it has been described that the separation preventing portion 12d1 formed on the projecting portion 12d of the lamp body 12 is disposed in a positional relationship close to the outer peripheral surface of the over-rotation restricting portion 40d of the protruding piece 34B. However, it is also possible to adopt a configuration in which the protrusion pieces 34B are arranged in a positional relationship in contact with the outer peripheral surface of the overrotation restricting portion 40d.

  In the above embodiment, the light source 20 is described as being supported by the rear wall 12c of the lamp body 12 via the substrate 22. However, the light source 20 is supported by the socket via the substrate 22. The socket may be detachably attached to the rear wall 12c of the lamp body 12.

  In the above embodiment, the housing that supports the optical member 30 is described as the lamp body 12, but other lamp component members (for example, a frame member supported by the lamp body 12, etc.) may be employed. It is.

  In the above-described embodiment, the vehicular lamp 10 has been described as a fog lamp. However, the vehicular lamp 10 may be configured as a lamp other than this (for example, a headlamp).

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  Fig.6 (a) is a figure similar to FIG. 3 which shows the principal part of the vehicle lamp which concerns on this modification.

  As shown in FIG. 6A, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the protrusion piece 134B of the optical member is partially different from that of the above embodiment. .

  That is, the projecting piece 134B of the present modification is also formed so as to extend in a plate shape along a vertical plane parallel to the optical axis Ax in the vicinity of the right side of the left leg portion 134L, and an optical axis adjusting screw is provided on the rear end surface. A plurality of groove portions 134Ba to be screwed with the 40 screw portions 40a are formed. On the other hand, in the protruding piece 134B of this modification, each groove 134Ba is formed not to extend linearly in the vehicle width direction but to extend along an arc centered on the axis Ax2 of the optical axis adjusting screw 40. .

  By adopting the configuration of this modification, the screwing range between the groove part 134Ba of the protruding piece 134B and the screw part 40a of the optical axis adjusting screw 40 can be expanded, and thereby the groove part 134Ba of the protruding piece 134B and the optical axis The screwed state of the adjusting screw 40 with the screw portion 40a can be further ensured. Further, it is possible to effectively prevent the groove portion 134Ba of the 134B from being detached from the screwed state with the screw portion 40a of the optical axis adjusting screw 40 due to vehicle vibration or the like.

  Next, a second modification of the above embodiment will be described.

  FIG.6 (b) is a figure similar to FIG. 3 which shows the principal part of the vehicle lamp which concerns on this modification.

  As shown in FIG. 6B, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the protrusion piece 234B of the optical member is partially different from that of the above embodiment. .

  That is, the projection piece 234B of this modification is also formed to extend in a plate shape along a vertical plane parallel to the optical axis Ax in the vicinity of the right side of the left leg portion 234L, and an optical axis adjusting screw is provided on the rear end surface thereof. A plurality of groove portions 234Ba to be screwed with the 40 screw portions 40a are formed. On the other hand, in the projection piece 234B of the present modification, each groove portion 234Ba does not extend linearly in the vehicle width direction, but along an arc having a larger radius of curvature than the arc centered on the axis Ax2 of the optical axis adjusting screw 40. The protrusions 234B are formed to extend and the plate thickness dimension is set to a larger value than in the above embodiment.

  Even when the configuration of this modified example is adopted, the screwing range between the groove portion 234Ba of the protrusion piece 234B and the screw portion 40a of the optical axis adjusting screw 40 can be expanded, and thereby the groove portion 234Ba of the protrusion piece 234B and the light The screwed state of the shaft adjusting screw 40 with the screw portion 40a can be further ensured. Further, it is possible to effectively suppress the groove portion 234Ba of the 234B from being detached from the screwed state with the screw portion 40a of the optical axis adjusting screw 40 due to vehicle vibration or the like.

  Next, a third modification of the above embodiment will be described.

  FIG. 7 is a view similar to FIG. 4 showing the main part of the vehicular lamp according to this modification.

  As shown in the figure, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the optical axis adjustment screw 340 is partially different from that of the above embodiment. The structures of the optical member 330 and the lamp body 312 are also partially different from those in the above embodiment.

  That is, the optical axis adjustment screw 340 of this modification is also formed so that its diameter gradually decreases from the lower end portion toward the upper end portion, and a screw portion 340a is formed at the upper end portion.

  On the other hand, the screw 340a of the optical axis adjusting screw 340 of the present modification is configured by the substantially upper half of the hourglass worm. That is, the threaded portion 340a is such that the distance to the upper edge of the hourglass worm is greater than the distance to the lower edge of the hourglass worm with reference to the most constricted portion of the hourglass worm (that is, the portion having the smallest diameter). It is getting longer.

  The optical axis adjusting screw 340 is disposed in a state where the screw portion 340a has the smallest diameter at the position of the optical axis Ax and gradually increases toward the upper edge. That is, the screw portion 340a is formed so that its diameter increases along the arc B centered on the rotation axis Ax1.

  The optical axis adjusting screw 340 also has a shaft portion located in the middle thereof with the screw portion 340a exposed in the lamp chamber and the lower end portion exposed to the external space, as in the above embodiment. Although it is supported by the lamp body 312 at 340b, the shaft portion 340b is formed with a larger diameter than in the above embodiment.

  The configuration of the lens 332, the main body portion 334A of the lens holder 334, the leg portion 334L, and the like of the optical member 330 of the present modification is the same as that of the above embodiment, but the configuration of the protruding piece 334B is the above embodiment. Is different.

  Specifically, the protrusion piece 334B of the present modification is formed to extend in a plate shape along a vertical plane parallel to the optical axis Ax in the vicinity of the right side of the left leg 334L, and the rear end face has a light beam. A plurality of (specifically, two) groove portions 334Ba screwed with the screw portion 40a of the shaft adjusting screw 40 are formed so as to extend in the vehicle width direction. On the other hand, in the protrusion piece 334B of the present modification example, when the optical member 330 is at the rotation reference position, the plurality of groove portions 334Ba has a substantially central position in the vertical direction in the formation region of the screw portion 340a of the optical axis adjustment screw 340 (that is, the light The screw portion 340a is screwed in at a position above the axis Ax.

  FIG. 8 is a detailed view of a main part of FIG.

  As shown in the figure, each groove portion 334Ba has a substantially wedge-shaped vertical cross section and is formed to extend linearly in the vehicle width direction, and the vertical width thereof is the pitch of the screw portion 340a of the optical axis adjusting screw 340. Is set to the same value.

  Over-rotation restricting portions 340d and 340e having a diameter larger than the diameter of the upper end edge of the screw portion 340a are formed on both upper and lower sides of the screw portion 340a in the optical axis adjusting screw 340. The upper over-rotation restricting portion 340d is formed in a disc shape, and the lower over-rotation restricting portion 340e is formed in a truncated cone shape.

  In each of the excessive rotation restricting portions 340d and 340e, the optical member 330 exceeds the normal optical axis adjustment angle range from the rotation reference position (that is, the angle range indicated by the two-dot chain line in the drawing (for example, a range of about ± 4 °)). When it is rotated more than a predetermined angle (for example, about ± 11 °) (that is, when it is rotated to the position indicated by the broken line in the figure), it comes into contact with the upper end edge or lower end edge of the rear end portion of the projection piece 334B. The above rotation is regulated.

  In the upper part of the inner surface of the rear wall portion of the overhang portion 312d of the lamp body 312, the groove portion 334Ba of the projection piece 334B is detached from the screwed state with the screw portion 340a of the optical axis adjustment screw 340 due to the bending deformation of the optical axis adjustment screw 340. A detachment preventing portion 312d1 for preventing this is formed so as to protrude in a positional relationship close to the outer peripheral surface of the upper over-rotation restricting portion 340d.

  Specifically, the separation preventing portion 312d1 has a gap C between the separation preventing portion 312b2 and the outer peripheral surface of the upper overrotation restricting portion 340d so that the groove portion 334Ba of the protruding piece 334B and the optical axis adjusting screw 340 It is formed to have a value (for example, a value of about C = 0.2 to 0.6 × D) smaller than the dimension D of the effective tooth in the screwed state with the screw portion 340a.

  The function of the separation preventing unit 312d1 will be described as follows.

  That is, the optical member 330 has a rotation moment (rotation moment indicated by an arrow in the figure) that rotates the projection piece 334B in the upward direction, so that the projection piece 334B is screwed with the groove portion 334Ba. In the threaded portion 340a of the optical axis adjusting screw 340 in the state, the downward inclined surface comes into contact with the groove portion 334Ba of the projection piece 334B and receives upward pressing force (pressing force indicated by an arrow in the drawing).

  Thus, the upper end of the optical axis adjusting screw 340 tends to bend toward the rear side of the lamp as indicated by a two-dot chain line in the figure. Further deformation due to the contact is restricted, thereby preventing the groove portion 334Ba of the projection piece 334B from being detached from the screwed state with the screw portion 340a.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  In addition, in the present modification, the screw portion 340 of the optical axis adjustment screw 340 is constituted by the substantially upper half of the hourglass worm, so that an upward pressing force received at the threaded portion with the groove portion 334Ba of the projection piece 334B is received. It can be efficiently received on the downward slope of the screw portion 340, and thereby the screwed state between the projection piece 334B and the optical axis adjusting screw 340 can be further ensured.

  Next, the 4th modification of the said embodiment is demonstrated.

  FIG. 9 is a view similar to FIG. 2 showing a vehicular lamp 410 according to this modification.

  As shown in the figure, the basic configuration of this modification is the same as that of the above embodiment, but the arrangement of the optical axis adjusting screw 40 is different from that of the above embodiment. The structures of the member 430 and the lamp body 412 are also partially different from those in the above embodiment.

  That is, the optical axis adjustment screw 40 of this modification is arranged in a state where the optical axis adjustment screw 40 of the above embodiment is rotated upward by a predetermined angle (for example, about 10 to 30 °) around the rotation axis Ax1. ing.

  The optical member 430 of the present modification is also the same in the configuration of the lens 432 and the main body portion 434A and the leg portion 434L of the lens holder 434 as in the above embodiment, but the configuration of the protruding piece 434B is in the above embodiment. Is different.

  Specifically, the protrusion piece 434B of the present modification is formed so as to extend in a plate shape along a vertical plane parallel to the optical axis Ax in the vicinity of the right side of the left leg portion 434L. A plurality of (specifically, two) groove portions 434Ba screwed with the screw portion 40a of the shaft adjusting screw 40 are formed to extend in the vehicle width direction. On the other hand, in the projection piece 434B of the present modification example, when the optical member 430 is at the rotation reference position, the plurality of groove portions 434Ba are substantially at the center in the vertical direction of the formation region of the screw portion 40a of the optical axis adjustment screw 40 (that is, the light It is configured to be screwed with the screw portion 40a at a position above the axis Ax.

  The lamp body 412 of this modification is different in the shape of the protruding portion 412d from that of the above embodiment. At this time, the groove portion 434Ba of the projection piece 434B is engaged with the screw portion 40a of the optical axis adjustment screw 40 due to the bending deformation of the optical axis adjustment screw 40 on the inner surface of the rear wall portion of the overhang portion 412d of the lamp body 412. A detachment preventing portion 412d1 for preventing the detachment from the upper portion is formed so as to protrude in a positional relationship close to the outer peripheral surface of the upper overrotation restricting portion 40d.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  In addition, in the present modification, the optical axis adjustment screw 40 is disposed in a forward tilted state, so that the upward pressing force that the optical axis adjustment screw 40 receives at the threaded portion with the groove portion 434Ba of the projection piece 434B is reduced. It can be efficiently received on the downward slope of the screw portion 40, and thereby the screwed state between the groove portion 434Ba of the projection piece 434B and the screw portion 40a of the optical axis adjusting screw 40 can be further ensured.

  In addition, the numerical value shown as a specification in the said embodiment and its modification is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above-described embodiment and its modifications, and a configuration with various other changes can be adopted.

10,410 Vehicle lamp 12,312,412 Lamp body (housing)
12a Right side wall 12a1 Recessed part 12b Left side wall 12b1 Through hole 12c Rear wall 12d, 312d, 412d Overhang part 12d1, 312d1, 412d1 Detachment prevention part 14 Translucent cover 16 Plug member 20 Light source 20a Light emitting surface 22 Substrate 30, 330, 430 Optical Member 32, 332, 432 Lens 34, 334, 434 Lens holder 34A, 334A, 434A Main body portion 34B, 134B, 234B, 334B, 434B Projection piece 34Ba, 134Ba, 234Ba, 334Ba, 434Ba Groove 34L, 34R, 134L, 234L, 334L, 434L Leg part 34La, 34Ra Support point projection part 40, 340 Optical axis adjustment screw 40a, 340a Screw part 40b, 340b Shaft part 40c Driver insertion hole 40d, 40e, 340d, 340e Rotation restricting portion 42 O-ring A, B Arc Ax Optical axis Ax1 Rotating axis Ax2 Axis C Clearance dimension D Effective tooth dimension

Claims (4)

In a vehicular lamp configured to control light distribution by an optical member from a light source,
A housing for rotatably supporting the optical member about a rotation axis extending in a first direction intersecting the lamp front-rear direction, and light for rotating the optical member about the rotation axis relative to the housing With an axis adjustment screw,
The optical axis adjustment screw is supported by the housing in a state of being arranged so as to extend in the lamp front-rear direction and the second direction intersecting the first direction on the lamp rear side from the rotation axis,
On the optical member, a protruding piece extending toward the rear of the lamp is formed,
A groove portion is formed on the rear end face of the protruding piece to be screwed with the optical axis adjusting screw .
When the optical member is rotated by a predetermined angle or more from the rotation reference position on the optical axis adjustment screw, an over-rotation restricting portion is formed which contacts the rear end portion of the protruding piece and restricts further rotation. Has been
A separation preventing portion for preventing the groove portion of the protruding piece from being disengaged from the screwed state with the optical axis adjustment screw due to bending deformation of the optical axis adjustment screw is provided on the housing. Formed in a positional relationship close to the outer peripheral surface of the part,
The dimension of the gap between the separation preventing part and the outer peripheral surface of the over-rotation restricting part is smaller than the dimension of the effective tooth in the threaded state of the groove part of the protruding piece and the screw part for adjusting the optical axis. A vehicular lamp characterized by being set .   The vehicular lamp according to claim 1, wherein the optical axis adjusting screw has a drum-shaped worm at a threaded portion that engages with a groove portion of the protruding piece. The first direction is set in the horizontal direction and the second direction is set in the vertical direction;
3. The vehicular lamp according to claim 2, wherein the screw portion of the optical axis adjusting screw is constituted by a substantially upper half portion of the hourglass worm.   The vehicular lamp according to any one of claims 1 to 3, wherein the groove portion of the protruding piece is formed so as to extend along an arc centered on an axis extending in the second direction.

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