JP3116987B2 - Automotive headlamp tilt measuring instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device for confirming whether the irradiation direction of a headlamp for a vehicle in the left-right direction, that is, the irradiation angle in the left-right direction of the lamp is at a proper position. If not, the present invention relates to an inclination measuring device for a headlamp for an automobile, which can easily be adjusted so that the irradiation angle in the left-right direction of the headlamp becomes a normal position.

[0002]

2. Description of the Related Art A headlamp for an automobile will be described by taking a reflector movable type headlamp in which a reflector is supported in a tiltable manner in a lamp body as an example. As shown in FIG. The back side of 202 is supported by three aiming screws 203 and 204 extending forward and backward and one swing fulcrum 205. FIG. 20 is a front view of the reflector.
Reference numerals 03 and 204 extend in a direction perpendicular to the plane of the paper.
Aiming screws 203 and 204 are lamp body 2
01 is supported rotatably on the rear wall of the reflector 2 and the reflector 2 by aiming screws 203 and 204.
A support point 02 (a reflector-side nut member serving as an aiming screw support member) is disposed, for example, orthogonal to the swing support point 205 when viewed from the front of the lamp. When the aiming screws 203 and 204 are rotated, the reflector-side nut member screwed to the aiming screws 203 and 204 is moved to the aiming screw 20.
3 and 204, whereby the reflector 202 is tilted around the horizontal axis Lx and the vertical axis Ly, respectively, so that the irradiation angle of the lamp is adjusted. Reference numeral 206 denotes a bulb which is a light source mounted on the reflector 202.

Japanese Patent Application Laid-Open No. Hei 5-290604 can be cited as a first conventional tilt measuring instrument. This is, as shown in FIGS. 14 and 15,
A guide member 212 fixed to the rear wall of the lamp body 201 and extending in parallel with the aiming screw 203;
A U-shaped nut member 214 having one side opened and screwed into the aiming screw 203;
4, a zero-point adjustment plate 218 that engages with the guide member 212 and can slide along the guide member 212, a cursor 218a formed on the plate 218, and a zero-point adjustment plate 218 formed on the guide member 212. And a scale 212a.

Since the cursor 218a slides along the scale 212a in conjunction with the rotation of the aiming screw 203, the position of the reflector 202 is tilted and adjusted (hereinafter referred to as aiming adjustment) so that the irradiation angle of the headlamp becomes appropriate. ), The cursor 218a
Is adjusted to the zero point position of the scale 212a (hereinafter, referred to as zero point adjustment). If the reflector tilts and the irradiation angle of the headlamp is deviated thereafter, the cursor is shifted by an amount corresponding to the deviation of the irradiation angle of the headlamp. 218a is the scale 212a
Deviates from zero. Therefore, anyone can easily adjust the aiming by turning the aiming screw 203 so as to eliminate this amount of displacement (set the cursor 218a to the zero point position of the scale 212a).

Japanese Patent Laid-Open No. Hei 4-198830 is an example of a second conventional tilt measuring instrument. This is fixed to the lamp body 201 as shown in FIGS.
And a transparent case 220 surrounding the transparent case 220
And a cylindrical base 222 that is rotatable relative to the aiming screw 203 and a male screw part 222a formed on the outer peripheral surface of the base 222 and is prevented from rotating with respect to the transparent case 220. Member 224
A connecting member 226 disposed between the base 222 and the aiming screw 203 for connecting and integrating the base 222 and the aiming screw 203;
And a scale 225 formed on the slide member 224. The slide line 22 is connected to the rotation of the aiming screw 203.
4 slides back and forth in the transparent case 220, the deviation of the irradiation angle of the headlamp is
It appears as a shift between 5a. Reference numeral 208 in FIG. 17 denotes a reflector-side screw support member screwed into the aiming screw 204.

The rear projecting portion 204 of the aiming screw 203 is formed in a rectangular cross section, and as shown in FIG.
7 engages with the engaging recess 223 of the base 222, and the tip end 227 of the swinging piece is
4, the base 222 is connected and integrated with the aiming screw 203, and as shown in FIG. 18, by pulling out the connecting member 226 to the rear, the rocking piece tip 227 is engaged with the base 222. The state where the aiming screw 203 can be rotated without being linked to the base 222 by releasing from the engagement recess 223 and releasing the holding state of the aiming screw rear projecting part 204 (the connection between the base 222 and the aiming screw 203 is released). Can be taken as an alternative.

For this reason, according to the second prior art, after the zero point adjustment, if the connecting member 226 is pulled out and the aiming adjustment is performed while the connection between the base 222 and the aiming screw 203 is released, the reference line 221 and the scale zero point 22 can be obtained.
Since there is no deviation from 5a, there is a feature that it is not necessary to adjust the zero point after the aiming adjustment.

[0008]

However, in the first prior art, although the structure is simple, in order to perform the zero adjustment, the fixing screw 218b of the zero adjustment plate 218 is loosened and the plate 218 is fixed to the nut member. 214
, And after the plate 218 is in the proper position, the fixing screw 218b must be tightened again.
There is a problem that the zero adjustment work is very troublesome.

In the second prior art described above, if the aiming adjustment is performed in a state where the connecting member 226 is pulled out and the connection between the base 222 and the aiming screw 203 is disconnected, the scale zero point does not deviate, so that the zero adjustment after the aiming adjustment is performed. It is unnecessary and very convenient. However, there are problems in that the number of parts is large, the structure is very complicated, the cost is high, and the assembling to the headlamp is correspondingly complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. A first object of the present invention is to provide a vehicle for which the number of parts is small, the structure is very simple, and the zero adjustment after the aiming adjustment is simple. An object of the present invention is to provide a headlamp inclination measuring device. Another object of the present invention is to provide a headlamp inclination measuring instrument for a vehicle, which has a small number of parts and a simple structure, and does not require zero adjustment after aiming adjustment.

[0011]

According to a first aspect of the present invention, a tilting member having a light reflecting surface for setting an irradiation direction of a lamp is provided as a reference member. A swinging fulcrum provided between the first and second members, and a left-right aiming screw and a vertical aiming screw that penetrate the reference member back and forth.
Supported at a point, by rotating the aiming screw, the tilting member-side screw support portion screwed to the aiming screw advances or retreats along the aiming screw, or is rotatably supported by a bearing provided on the reference member. By rotating the nut member, the aiming screw screwed into the nut member and prevented from rotating with respect to the reference member advances and retreats in the axial direction back and forth integrally with the tilting member side screw support portion, and the tilting member A tilting member movable type automobile headlamp in which the irradiation angle of the headlamp is adjusted with respect to the member in the up-down direction and the left-right direction, and a guide extending substantially parallel to the left-right aiming screw on the reference member. A member is provided, assembled between the left-right direction aiming screw and the guide member, and tilted. A tilt measuring device for measuring the inclination of the member in the left-right direction, wherein the tilt measuring device is engaged with a side edge of the guide member facing the aiming screw, is prevented from rotating, and is guided by the aiming screw. A sliding portion slidable in the member extending direction, and in the vicinity of the sliding portion, by gripping the aiming screw, the sliding operation of the sliding portion is linked to the rotation of the aiming screw or the forward and backward movement, and By pulling out to the side, it consists of a screw gripper that can release the linkage with the aiming screw of the slide part, and a relative scale provided between the slide part and the guide member, and slides between the slide part and the guide member. When the linkage with the aiming screw of the section is released, the relative scale of the slide section is In the state in which the slide portion is temporarily linked to the aiming screw while the slide portion is linked to the aiming screw, the concave and convex elastic locking allows the slide along the guide member of the slide portion in conjunction with the rotation of the aiming screw. Means, particularly, the uneven elastic locking means,
It is provided between the U-shaped horizontal bar-shaped portion of the U-shaped cross-section engaging portion on the slide portion side engaging with the side edge portion of the guide member and the sliding contact surface thereof.

[0012]

The tilting member side screw supporting portion is screwed to the aiming screw rotatably supported by the reference member, and the tilting member side screw is rotated by rotating the aiming screw. A first type in which a bearing portion advances and retreats along an aiming screw, and a tilting member tilts with respect to a reference member (tilts around a tilt center axis), and a nut member rotatably supported by a bearing provided on the reference member. Is rotated, the aiming screw screwed into the nut member and stopped from rotating with respect to the reference member advances and retreats, and the tilting member tilts with respect to the reference member (tilts around the tilt center axis). There are two types. In any type, in a state where the screw gripper of the inclination measuring device directly or indirectly grips the screw (a state in which the sliding operation of the slide unit is linked to the rotation of the aiming screw),
Since the amount of tilting of the tilting member with respect to the reference member due to rotation of the aiming screw is proportional to the amount of movement of the sliding portion with respect to the guide member, the amount of tilting of the tilting member with respect to the reference member, that is, the amount of deviation of the irradiation angle of the headlamp in the left-right direction is ,
It appears as a change in the scale between the slide portion and the guide member. For this reason, it is possible to know from the change in the scale whether the irradiation angle of the headlamp in the left-right direction is appropriate or not, and when it is not appropriate, the deviation amount of the irradiation angle. If there is a deviation, the aiming mechanism moves the aiming screw in the first type to rotate the aiming screw to advance and retreat the reference member-side screw support so that the deviation in the scale is eliminated, and in the second type, By rotating the nut member, the aiming screw is moved forward and backward, and the tilting member is tilted (hereinafter, referred to as aiming adjustment) to adjust the irradiation angle of the headlamp in the left-right direction. In addition, the screw gripping part of the inclination measuring instrument is pulled out to the side of the aiming screw, and the slide part is not affected by the rotation (or advance / retreat) of the aiming screw at all. After the aiming adjustment is performed in this state, the slide portion is slid along the guide member to a predetermined position (zero position of the relative scale between the slide portion and the guide member). Is in a state of holding the aiming screw (the slide portion and the aiming screw are in a linked state), and the tilt measuring device is in a measurable state. Since the engaging position of the concave-convex elastic locking means between the slide portion and the guide member coincides with the graduation zero point position, the sliding portion which is engaged with the aiming screw is moved along the aiming screw, and the concave-convex locking means is moved. Is engaged, the scale between the slide portion and the guide member naturally becomes the zero point position. Further, in a state in which the linkage with the aiming screw of the slide portion is released, the relative scale between the slide portion and the guide member may be adjusted to the zero point position by the concave and convex elastic locking means provided between the slide portion and the guide member. Since there is no link between the slide portion and the aiming screw, the rotating power (or forward / backward force) of the aiming screw is hardly transmitted to the slide portion, and the elastic urging force of the uneven elastic locking means locks the slide portion to a predetermined position. Hold in position. Therefore, even if the aiming adjustment is performed in this state (the state in which the linkage with the aiming screw of the slide portion is released and the zero point is adjusted), the zero point position of the scale does not shift at all. In a state where the slide portion is linked to the aiming screw, the locking force of the concave and convex elastic locking means for urging and holding the slide portion at a predetermined position (a position corresponding to the scale zero point) is determined by the rotation of the aiming screw (or nut member). Since the force is not large enough to hinder the forward / backward slide movement of the slide unit associated with the rotation due to aiming adjustment or the natural rotation caused by vibration, etc., the measurement operation of the inclination measuring device (the amount proportional to the amount of tilt of the tilting member) However, the operation of only the slide portion moving forward and backward is not hindered. In the case where an uneven elastic locking means for urging and holding the slide portion at a predetermined position (a position corresponding to the scale zero point) is provided between the side surface of the guide member facing the aiming screw and the slide portion, the uneven elasticity is provided. The elastic biasing force of the locking means acts on the aiming screw via the slide portion, and there is a possibility that the aiming screw and the guide member are deformed to be separated from each other,
As a result, the rotation preventing structure of the slide portion may not function sufficiently. However, in the present invention, the U-shaped horizontal bar portion of the U-shaped cross-section engaging portion on the slide portion side engaging with the side edge portion of the guide member and the sliding contact surface thereof (the surface on which the U-shaped horizontal bar portion of the guide member slides) Since the concave / convex elastic locking means is provided between (1) and (2), the elastic biasing force of the concave / convex elastic locking means acts between the slide portion and the guide member, but does not act between the guide member and the aiming screw. Therefore, there is no possibility that the aiming screw and the guide member are separated from each other due to the elastic urging force of the concave-convex elastic locking means provided between the slide portion and the guide member, so that the detent structure of the slide portion does not function properly.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 9 show an embodiment in which the present invention is applied to a reflector movable type headlamp in which a reference member is a lamp body and a tilting member is a reflector. FIG. 1 shows a tilt measuring device assembled. 2 is a horizontal sectional view of the headlamp (a sectional view taken along line II-II shown in FIG. 1), and FIG. 3 is a vertical sectional view of the headlamp (a line shown in FIG. 1). 4 to 6 are perspective views of an inclination measuring instrument for measuring the inclination of the irradiation angle in the left-right direction of the headlamp, and FIGS. 7 and 8.
Fig. 7 is a front view of the tilt measuring device (viewed from the position of line VII-VII shown in Fig. 2). Fig. 7 shows a state in which the screw gripper grips the male screw of the aiming screw, and the slide and the aiming screw are linked. FIG. 8 is a diagram showing a state in which the gripping of the aiming screw external thread portion by the screw gripping portion has been released, and the linkage between the sliding portion and the aiming screw has been released, and FIG. 9 shows the tilt measuring instrument assembled to the headlamp. It is a perspective view explaining a situation.

In these figures, reference numeral 2 denotes a container-like lamp body as a reference member, and a parabolic reflector 4 as a tilting member in which a bulb 3 as a light source is inserted is provided in the lamp body 2. The front lens 6 is mounted on the front opening of the lamp body 2 and is integrated as a headlamp. The reflector 4 is shown in FIGS.
As shown in FIG. 2, the lamp body 2 is supported by three points, a ball joint 10, a horizontal aiming screw 20, and a vertical aiming screw 30. The ball portion 12 of the ball joint 10 is fixedly supported on the lamp body 2 side, and the ball receiving portion 14 engaging with the ball portion 12 is inserted and fixed to a bracket 7 protruding from the rear side of the reflector 4. Has a structure capable of swinging about this ball joint 10. Also aiming screw 20,
An external thread 30 is made of metal or synthetic resin, extends through the lamp body 2 forward and backward, and is supported by the push-on fix 8 at the penetrating portion and rotatably supported by the lamp body 2. the front end of the screw 20 and 30 formed parts 20a ₁ screw support nut 21, 31 is screwed a screw bearing of the reflector 4 side. Aiming screw 2
Jig engaging portions 23 and 33 such as a driver are formed at the ends of the 0 and 30 extending rearward of the lamp body, and the nuts 21 and 31 are turned by turning the aiming screws 20 and 30. , 30 along,
Thereby, the inclination of the reflector 4 is changed.

That is, the left-right aiming screw 20
Of the reflector 4 (the screwing portion between the aiming screw 20 and the screw support nut 21) is located on the horizontal axis Lx passing through the ball joint 10 orthogonally to the irradiation axis L (see FIG. 2) of the headlamp. Point of support of the reflector 4 by the vertical aiming screw 30 (the screwing portion between the aiming screw 30 and the screw support nut 31)
Is a vertical axis L passing through the ball joint 10 at right angles to the horizontal support axis Lx.
y. Therefore, aiming screw 2
0, the screw support nut 21 advances and retreats along the screw 20 and the reflector 4
tilting around y, tilting the reflector 4 as a tilting member in the left-right direction with respect to the lamp body 2 as a reference member,
That is, the irradiation angle of the headlamp in the left-right direction can be adjusted.

On the other hand, when the aiming screw 30 is rotated, the screw support nut 31 is rotated.
The reflector 4 tilts around a horizontal axis Lx orthogonal to the vertical axis Ly, and tilts the reflector 4 as a tilting member in the vertical direction with respect to the lamp body 2 as a reference member, that is, the vertical direction of the head lamp. Can be adjusted. As described above, the tilting of the reflector 4, that is, the irradiation angle of the headlamp can be adjusted by the two aiming screws 20 and 30.

2, 4 to 9, reference numeral 20a ₂
Parallel, with external thread portions formed of the right screw Paragraph or 2 Article formed in the rear projecting portion of the lamp body 2 in the lateral direction aiming screw 20, the rear wall of the lamp body 2, and the male screw portion 20a ₂ , A guide member 60 having a T-shaped cross section is fixed. A linear scale 63 is formed along the guide member extending direction on the upper surface of the T-shaped cross bar 60a of the guide member 60, and the T-shaped vertical bar 60b is formed.
Is shaped in an arc toward the aiming screw 20 to increase the rigidity of the guide member 60. Reference numeral 50 denotes the male screw portion 20 of the aiming screw.
This is a first tilt measuring device that is attached between a ₂ and the guide member 60 and measures the left-right inclination of the reflector 4, that is, the left-right inclination of the irradiation angle of the headlamp.

The inclination measuring device 50 is provided with a guide member 60.
It engages with the side edge 60c on the aiming screw side and turns around.
Stopped and aiming screw external thread 2
0a _TwoAnd slide back and forth with respect to the guide member 60.
Some of the cutouts have a notched U-shaped
Ride part 51 and male screw part 20a_TwoFemale thread to match
56a, at the position of the notch 51a of the slide member 51.
A substantially rectangular slide integrated through the thin hinge 55
Screw holding part 56, slide part 51 and guide member 6
The relative scale (the cursor 74 and the linear scale) provided between 0
(63). And screw holding
The female screw portion 56a of the portion 56 is the male screw portion 20a_TwoScrew into
In the state, the amount of tilt of the reflector 4 in the left-right direction (vertical axis
The amount of tilt around Ly) is
The cursor 74 is graduated beforehand because it appears as the amount of movement.
63 (hereinafter referred to as zero point adjustment).
From the scale display indicated by the cursor 74
You can know the degree of tilt of the reflector 4 in the horizontal direction
You.

Slide 51 and screw grip 5
Reference numeral 6 denotes an integrally molded body of a synthetic resin such as nylon or ABS.
The structure is such that relative swing (see the arrow in FIG. 8) is possible with the thin hinge 55 connecting the two 51, 56 as the swing center.
Opposed side walls 53a of the sliding portion 51, 53b, the inter-53c, are aiming screw male thread portion 20a slightly larger inner diameter of the circular hole 52 than the outer diameter of ₂ formation, is formed slightly narrower than the inner diameter of the circular hole 52 and that the opening side of the slide portion 51 from the (downward) has the aiming screw male thread portion 20a ₂ to be introduced into the circular hole 52. That is, the inclination measuring device 50 is connected to the aiming screw 20.
In order to take up space for assembling to
A notch 60d is formed on the protruding end side of the side edge portion 60c of the zero, and from the position of the notch 60d, the inclination measuring device 50 can be assembled to the aiming screw 20 from above as shown by an arrow A in FIG. it can. More specifically, the screw introduction inclined surfaces 53a ₁ , 53b ₁ , 53c formed at the lower end portions of the side walls 53a, 53b, 53c.
₁ (see FIG. 8) is the aiming screw male thread 20a
₂ so that the slide portion 51 is
If pressed to a ₂ side (Fig. 8 the direction of arrow A), the side walls 53a,
53b and 53c are elastically deformed and pushed and expanded to form a circular hole 52.
Male screw part 20a ₂ is engaged (loosely fitted) into. 8 and 9 show a state in which the slide portion 51 is engaged with the aiming screw male thread portion 20a _2. The side wall 53a of the slide portion 51 on the guide member 60 side is engaged with the side edge portion 60c of the guide member 60 in the up-down direction and the slide portion 5 is formed.
A pair of upper and lower horizontal guides 54 and 58, which are U-shaped cross-section engaging portions for stopping the rotation of the shaft 1, are provided. Therefore, in a state where the horizontal guides 54 and 58 are engaged with the side edge portions 60c,
The sliding part 51 is an aiming screw male screw part 20a.
₂ can be slid along the guide member 60 in a state where it is loose.

On the other hand, the screw holding portion 56 is formed into a shape that just fits into the notch portion 51a of the slide portion 51, and the side wall 53a of the screw holding portion 56 is formed.
A female screw portion 56a is formed at a position facing the circular hole 52. At the lower end of the screw grip portion 56, an elastic hook 57 that can be engaged with an engaging concave portion 53d formed at the lower end of the side wall 53a of the slide portion 51 is formed, and the elastic hook 57 is engaged with the engaging concave portion 53d. When combined
The screw holding portion 56 is locked while holding the aiming screw male screw portion 20a _2, and the female screw portion 56a of the screw holding portion 56 is screwed into the male screw portion 20a _2.
Is held in a screwed state. That is, the state (internal thread portion 56 of the elastic hook 57 screw gripper 56 engages with the engaging recess 53d grips the screw male thread portion 20a ₂
a and the screw male screw portion 20a ₂ is screwed)
In addition, the horizontal guides 54 and 58 are connected to the side edge portions 6 of the guide member 60.
In a state in which the slide portion 51 is locked by engaging with the rotation of the aiming screw 20, the slide portion 51 moves back and forth along the guide member 60 by an amount proportional to the amount of rotation of the aiming screw 20. Slide to.

The lower horizontal guide 58 is a leaf spring-like elastic engagement piece formed narrower and thinner than the width and thickness of the upper horizontal guide 54.
In a state where the aiming screw male thread portion 20a ₂ to 2 is loosely fitted, the side edge portion 60a of the upper horizontal guide 54 and a lower horizontal guide the guide member 60 (the elastic engagement members) 58
Is held up and down. Further, a side edge portion 60 c of the guide member 60 is provided at the tip of the lower horizontal guide (elastic engagement piece) 58.
A bulging portion 58a is provided which can be engaged with the notch 62 provided at the position. The cursor 74 is set exactly at the position of the scale zero point 63a at the position where the tip bulging portion 58a is engaged with the notch 62. Have been. Therefore, by engaging the tip bulging portion 58a with the notch 62, the slide portion 51 can be temporarily fixed to this predetermined position, that is, the scale zero point position. Reference numeral 59 denotes the screw gripper 5
6 is a knob for operating the screw gripping portion formed to project forward of the lower end of 6.

The thin hinge 55 has an initial stress which urges the screw gripping portion 56 to rotate in the counterclockwise direction in FIG. That is, when the slide portion 51 and the screw holding portion 56 are integrally formed,
As shown by the solid line, the thin hinge 55 is formed in a state of extending straight, and when the elastic hook 57 shown in FIG. 7 is engaged with the engaging concave portion 53d, the thin hinge 55 is restored to the bent thin hinge 55. When the elastic hook 57 is disengaged from the engaging concave portion 53d, the screw grip portion 56 naturally swings around the thin hinge 55 due to the restoring force of the thin hinge 55, as shown in FIG. It will be in a state of jumping up as shown. Therefore, by grasping the knob 59 with a finger or disengaging the engaging hook 53d of the elastic hook 57 with an aiming screw turning operation jig such as a screwdriver, the screw gripping portion 56 and the aiming screw male screw portion are removed. it can be easily released screwed state of 20a ₂ (simply release the linkage between the slide portion 51 and the aiming screw 20).

Aiming adjustment and inclination measuring device 50
The zero adjustment of the scale in is performed as follows. FIG.
7. As shown in FIG.
Screw part 20a_TwoAnd the horizontal guides 54, 58
The sliding portion 5 is engaged with the side edge portion 60 c of the guide member 60.
1 is stopped by the guide member 60, and the slide portion 51
First, from the state where the aiming screw 20 and the
As shown in FIG. 5, the screw grip portion 56 was flipped up.
In the state, the slide portion 51 and the male screw portion 20
a _TwoBreak the link with. Next, the slide portion 51 (and
Slide the screw gripper 56) along the guide member 60
And the tip of the lower horizontal guide (elastic engagement piece) 58
When the bulging portion 58a is engaged with the notch 62, the
The mark 74 is located at the scale zero point 63a. That is, the zero point of the scale
Can be adjusted.

Next, the aiming adjustment is performed by rotating the aiming screw 20. In addition, slide part 5
1 and the aiming screw 20 are not linked to each other, so that even if the aiming screw 20 is rotated, the slide portion 51 is hardly affected by the rotation, and the lower horizontal guide (elastic engagement piece) which is an uneven elastic locking means. ) The engagement between the tip bulging portion 58a of 58 and the notch 62 causes the sliding portion 51
Is held at the scale zero point position (the position where the cursor 74 indicates the zero point 63a), so that the aiming adjustment can be performed without disturbing the scale zero point adjustment state.

After the aiming adjustment is completed, the screw grip 56 is swung around the thin hinge 55,
If you ask engaging the elastic hooks 57 on engagement recess 53d, in a state where the screw gripper 56 grips the internal thread portion 20a ₂ (the state in which the female screw portion 56a and the male screw portion 20a ₂ is screwed), aiming screw The rotation of 20 and the sliding operation of the slide portion 51 are linked (a state in which the deviation of the irradiation angle of the headlamp can be detected). If the aiming screw 20 is rotated in a state where the slide portion 51 and the aiming screw 20 are linked,
Since the slide portion 51 can slide against the engagement holding force by the concave and convex elastic locking means (engagement between the notch 62 and the distal end bulging portion 38a of the elastic engagement piece 58 as the upper horizontal guide),
The tilt measuring device properly displays the deviation of the irradiation angle in the left-right direction of the headlamp. In other words, when the reflector 4 tilts due to vibration or the like, the aiming screw 20 rotates with respect to the screw support nut 21 with the tilt of the reflector, and the screw 4 rotates with the rotation of the aiming screw 20. gripper 56 is moved forward and backward along the screw male thread portion 20a _2, i.e. the slide portion 51 only tilt amount corresponding reflector 4 along the guide member 60 to accurately slide, this is a scale shift (scale indicated by the cursor 74) Appears.

[0026] For example, now at the front side of the male screw portion 20a ₁ is 1 Article of the left screw of the aiming screw 20, the male screw portion 20a ₂ of the rear end side is 1 of Article or Article 2 right screws of, as seen from the driver When the optical axis L is tilted to the left, the aiming screw 20 is rotated clockwise as viewed from the driver and the nut 21 is in a forward state, and the cursor of the tilt measuring device 50 at this time is in a state. Reference numeral 74 denotes a scale shifted from the scale zero 63 a on the guide member 60 to the “L” display side, and this scale corresponds to the amount of inclination of the optical axis L to the left.

To attach the first inclination measuring device 50 to the aiming screw 20, as shown in FIG.
At the position of the notch 60d on the protruding end side of the guide member 60,
Mounting the slide unit 51 from the upper side of the aiming screw male thread portion 20a ₂ (to loosely fitted). That is, with the screw gripping portion 56 flipped up and the opening side of the slide portion 51 facing downward, the screw introduction inclined surfaces 53a ₁ ,
Introduced aiming screw male thread portion 20a ₂ into the circular hole 52 along the 53b _1, 53c _1, it causes engagement (loosely fitted) the circular hole 52 to the male screw portion 20a _2. Next, the horizontal guide 54,
9, the side edge 60c of the guide member 60 is aligned, and the slide portion 51 is pushed along the guide member 60 as shown by the outline arrow in FIG.
The side edge portion 60c is engaged between the eight. Further slide part 5
1 is slid along the guide member 60 so that the tip bulging portion 58 a of the elastic engagement piece 58, which is the lower horizontal guide, is engaged with the notch 62 of the guide member 60.
Is naturally held at the zero-adjusted position.

In FIG. 1 and FIG. 2, reference numeral 80 denotes a bubble tube tilt measuring device for measuring the vertical tilt of the reflector 4, that is, the vertical tilt of the irradiation angle of the headlamp. The measuring device 80 is attached to the upper wall of the reflector 4 and has a container-like casing 81 that opens upward, a lid 82 that is swingably supported by the casing 81 with respect to the horizontal axis Lx, And a straight bubble tube 84 suspended and supported by the casing 82 and accommodated in the casing 81. Reference numeral 86 denotes an adjustment screw for adjusting the zero point of the bubble tube 84.

FIG. 10 is a perspective view of a tilt measuring instrument according to a second embodiment of the present invention. In the inclination measuring device 50 according to the first embodiment, approximately one sixth of the U-shaped block is divided, and the screw grip portion 56 is configured by the divided portion. In the inclination measuring device 50A, the U-shaped block is vertically divided into two at the position of the circular hole, and the slide portion 51A having the smooth circular hole 52 formed therein and the screw grip portion 56A having the female screw portion 56a formed therein. It is configured.

The other parts are the same as in the first embodiment.
The description is omitted by attaching the same reference numerals. FIG.
FIGS. 1 and 12 show a third embodiment of the present invention.
FIG. 11 is a plan view of an automotive headlamp showing a cross section of the aiming mechanism (a view corresponding to FIG. 2 of the first embodiment), and FIG. 12 is an enlarged vertical sectional view of the aiming mechanism.

In the above two embodiments, the present invention is applied to a reflector movable type headlamp in which a reflector 4 as a tilting member is supported to be tiltable with respect to a lamp body 2 as a reference member. The structure of the aiming mechanism that supports the reflector 4 in a tiltable manner is such that the aiming screw 20 rotatably supported on the lamp body 2 is rotated to thereby be fitted to the reflector 4 and screwed into the screw 20. The structure was such that the support nut 21 advanced and retracted, whereby the reflector 4 was tilted.

On the other hand, in the present embodiment, a lamp body / reflector unit (hereinafter simply referred to as a unit) 4A, which is a tilting member having a reflector integrally formed on the inner peripheral surface of the lamp body, is provided with respect to a lamp housing 2A as a reference member. The present invention is applied to a tiltable supported head unit of a movable unit type, and an aiming mechanism for tiltably supporting a unit 4A has a bevel gear 94 attached to a bearing 92 provided in a lamp housing 2A. A nut member 93 is rotatably supported, and the female screw portion 93a of the nut member 93 with the bevel gear has an aiming screw 20a.
(Aiming screw male screw portion 20a ₁ composed of one left-handed screw) is screwed, and the front end ball portion 20b of the aiming screw 20 is prevented from rotating by the ball receiving member 5 fitted to the back side bracket of the unit 4A. , Nut member 93
Is rotated to move the aiming screw 20 back and forth, thereby tilting the unit 4A in the left-right direction. Reference numeral 20c denotes the ball receiving member 5
And a rectangular cross section on the side of the ball portion 20b, which is sandwiched between a pair of left and right engaging walls and is prevented from rotating around an axis.

Aiming screw 20 (screw external thread 20a) projecting rearward from lamp housing 2A.
₁ ), an inclination measuring device 50 having the same structure as that of the first embodiment is assembled. And the screw gripper 5
In state 6 to grip the screw male thread portion 20a ₁ (state the slide portion 51 is linked to the aiming screw 20), the sliding portion 51 by rotating the nut member 93 (and the screw gripper 56) and aiming screw 20 The cursor 74 integrally moves (slides along the guide member 60), and the cursor 74 moves along the scale 63 accordingly. That is, the amount of movement of the aiming screw 20 (the amount of tilt of the unit 4A in the left-right direction).
The cursor 74 slides along the scale 63 by an amount proportional to.

On the other hand, in a state releasing the grip of the screw male thread portion 20a ₁ by the screw gripper 56 (state associated is released the slide portion 51 and the aiming screw 20) is the lower horizontal guide of the sliding portion 51 The locking urging force generated by the engagement between the distal end bulging portion 58a of the elastic engaging piece and the notch 62 of the guide member 60 urges and holds the slide portion 51 at the scale zero point position.
(And the screw holding portion 56) are held at a predetermined position without being affected by the movement of the aiming screw 20 due to the rotation of the nut member 93 at all.

Reference numeral 96 in FIG. 12 is a solid hole for inserting a driver provided in the bearing 92. The tooth tip of the driver 97 inserted in the solid hole 96 meshes with the bevel gear 94 of the nut member 93. By rotating the driver 97, the nut member 93 is rotated, and accordingly, the aiming screw 20 moves forward and backward. The other parts are the same as those of the first embodiment, and the description thereof will be omitted by retaining the same reference numerals. The details of the aiming mechanism having the structure shown in FIG. 11 and FIG.
This is described in detail in 34557.

In the embodiment described above, the guide member 60 is used.
The notch 62 formed in the side edge portion 60c of the
The protrusions 58a of the elastic engagement pieces 58, which are lower horizontal guides provided on the upper and lower guides, constitute the uneven elastic locking means. However, the lower horizontal guides 58 are formed wider and thicker, and the upper horizontal guides are formed. The upper horizontal guide 54 has elasticity by forming the width 54 to be narrower and thinner, and the bulging portion formed in the upper horizontal guide 54 and the notch 62 formed in the guide member 60 constitute a concave-convex elastic locking means. May be.

Notches and recesses are formed in the upper and lower horizontal guides 54, 58, and the side edge 60 of the guide member 60 is formed.
A swelling portion which can be engaged with a notch or a concave portion on the side of the horizontal guides 54, 58 may be formed on the sliding contact surface with the horizontal guides 54, 58 in c. That is, the horizontal guides 54, 58
Any structure may be used as long as a convex portion is formed on one side of the sliding contact surface with the side edge portion 60c, and a concave portion for engaging the convex portion is formed on the other side.

In the various embodiments described above, the guide member 60 is described as a separate structure from the lamp body 2 and the lamp housing 2A. However, the guide member 60 has a structure integrally formed with the lamp body 2 and the lamp housing 2A. Is also good.
Further, in the various embodiments described above, the screw holding portion 56 (56) for holding the aiming screw male screw portion 20a is used.
Although the female screw portion 56a is formed on the screw gripping surface of A), when the gripping force of the screw male screw portion 20a by the screw gripping surface is large, the female screw portion 5a is not necessarily required.
It is not necessary to form 6a.

[0039]

As is clear from the above description, the inclination measuring device for a headlamp for an automobile according to the present invention can be provided with a small number of parts, a very simple structure, and a correspondingly low cost. Also, after assembling the slide part to the aiming screw, assembling the screw gripping part to the aiming screw, the screw gripping part directly grips the aiming screw, or indirectly assembling the screw gripping part to the slide part By holding the aiming screw, the tilt measuring device can be easily assembled to the headlamp. In addition, by pulling out the screw gripping part to the side of the aiming screw, the linkage between the slide part and the aiming screw can be easily released, and aiming adjustment is performed in a state in which the linkage between the slide part and the aiming screw is released. By moving the portion to the scale zero point position and holding the aiming screw by the screw holding portion, the slide portion and the aiming screw can be linked to each other, so that the zero point adjustment is greatly simplified. Also, in the state where the linkage between the slide portion and the aiming screw is released, if the concave and convex elastic locking means provided between the slide portion and the guide member is engaged, the scale automatically becomes the zero point position. It is easy to adjust the position of the slide portion. Further, the slide portion is biased and held at the scale zero point position by the concave-convex elastic locking means. Therefore, even if the aiming adjustment is performed, the scale zero point does not go out of order. No subsequent zero adjustment is required. Further, the elastic biasing force of the uneven elastic locking means between the slide portion and the guide member acts only in the direction of clamping the side edge of the slide portion, but does not act in the direction of separating the guide member and the aiming screw. That is,
When the concave-convex elastic urging force acts in a direction to separate the slide portion and the guide member from each other, the elastic urging force causes the aiming screw and the guide member to be pushed and spread in a direction to separate from each other, and the slide is performed. Although there is a possibility that the detent of the part may be insufficient, in the present invention,
Although the elastic urging force of the concave-convex elastic locking means acts on the guide member and the slide portion, it does not act on the aiming screw at all, so that there is no play between the guide member and the slide portion which hinders the rotation preventing function of the slide portion. Long term use of the tilt measuring device is guaranteed.

[Brief description of the drawings]

FIG. 1 is a front view of an automobile headlamp with a tilt measuring device according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the headlamp (the line II shown in FIG. 1).
Sectional view along -II)

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

FIG. 4 is a perspective view of an inclination measuring device for measuring the inclination of the irradiation angle in the left-right direction of the headlamp.

FIG. 5 is a perspective view of a tilt measuring device for measuring the tilt of the irradiation angle in the left-right direction of the headlamp.

FIG. 6 is a perspective view of an inclination measuring device for measuring the inclination of the irradiation angle in the left-right direction of the headlamp.

FIG. 7 is a front view of the inclination measuring instrument in a state where the slide section and the aiming screw are linked.

FIG. 8 is a front view of the tilt measuring instrument in a state where the linkage between the slide portion and the aiming screw is released.

FIG. 9 is a perspective view illustrating a state in which the tilt measuring instrument is assembled to a headlamp.

FIG. 10 is a perspective view of a tilt measuring instrument according to a second embodiment of the present invention.

FIG. 11 is a plan view of an automotive headlamp to which a tilt measuring device according to a third embodiment of the present invention is assembled.

FIG. 12 is an enlarged vertical sectional view of an aiming mechanism of the headlamp.

FIG. 13 is a front view of a conventional headlamp.

FIG. 14 is a perspective view of a tilt measuring instrument according to the first prior art.

FIG. 15 is a cross-sectional view of the tilt measuring instrument.

FIG. 16 is a longitudinal sectional view of a tilt measuring device according to a second prior art.

FIG. 17 is an exploded perspective view of the tilt measuring instrument.

FIG. 18 is a longitudinal sectional view of the inclination measuring instrument, showing a state in which a base and an aiming screw are disconnected.

FIG. 19 is a longitudinal sectional view of the inclination measuring instrument, showing a state where a base and an aiming screw are connected.

[Explanation of symbols]

2 Lamp Body as Reference Member 2A Lamp Housing as Reference Member 3 Bulb as Light Source 4 Reflector as Tilting Member 4A Unit as Tilting Member 6 Front Lens 10 Ball Joint as Oscillator of Reflector 20 Left / Right Aiming Screw 20a ₁ , 20a ₂ Male screw portion of left-right direction aiming screw 21 Screw support nut as tilting member side screw support portion 30 Vertical direction aiming screw 50, 50A Incline measuring device 51, 51A for measuring inclination of irradiation angle of headlamp in left-right direction Slide portion 52 Circular hole formed in the slide portion 54 Upper horizontal guide 55 that forms a U-shaped cross-section engaging portion 55 Thin hinge 56, 56A Screw grip portion 56a Female screw portion 58 Lower portion that forms a U-shaped cross-section engaging portion Horizontal guide, elastic concave A leaf spring-like elastic engaging piece 58a forming a locking means 58a bulging portion 60 a guide member 62 a notch 63 forming an elastic concave and convex locking means 63 scale 63a scale zero point 74 cursor 93 nut member screwed into an aiming screw L headlamp Irradiation axis of Lx Horizontal axis Ly Vertical axis

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F21S 8/10 F21V 14/04

Claims (1)

(57) [Claims] A tilting member having a light reflecting surface for setting an irradiation direction of a lamp, one swing fulcrum provided between the tilting member and a reference member, a left-right aiming screw penetrating the reference member back and forth, and The tilting member-side screw support portion screwed to the aiming screw advances and retreats along the aiming screw by rotating the aiming screw, or a bearing provided on the reference member. By rotating the nut member rotatably supported on the nut member, the aiming screw screwed to this nut member and prevented from rotating with respect to the reference member moves forward and backward in the axial direction integrally with the tilting member side screw support portion. The tilting member tilts up and down and left and right with respect to the reference member to adjust the irradiation angle of the headlamp. In the tilting member movable type automobile headlamp to be adjusted, a guide member extending substantially parallel to the left-right direction aiming screw is provided on the reference member, and is assembled between the left-right direction aiming screw and the guide member, A tilt measuring device for measuring the tilt of the tilting member in the left-right direction, wherein the tilt measuring device is engaged with a side edge of the guide member facing the aiming screw, is prevented from rotating, and loosely engages with the aiming screw. A sliding portion slidable in the guide member extending direction, and gripping the aiming screw in the vicinity of the sliding portion, so that the sliding operation of the sliding portion is linked to the rotation of the aiming screw or the forward and backward movement of the aiming screw, and the aiming screw By pulling out to the side of, the linkage with the aiming screw of the slide part can be released A screw grip portion, and a relative scale provided between the slide portion and the guide member.The slide between the slide portion and the guide member is in a state where the linkage with the aiming screw of the slide portion is released. The part is temporarily stopped at a predetermined position in the sliding direction where the relative scale is a zero point, and in a state where the slide part is linked to the aiming screw, the slide along the guide member of the slide part is linked to the rotation of the aiming screw. The concave-convex elastic locking means is provided, and the concave-convex elastic locking means includes a U-shaped horizontal bar-shaped portion of a U-shaped cross-section engaging portion on a slide portion side engaging with a side edge portion of the guide member and sliding thereof. An inclination measuring device for an automobile headlamp, provided between contact surfaces.