JPH0731453Y2 - Car headlamp - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vehicle headlamp equipped with a level for confirming whether the vertical illumination angle of the headlamp is in a normal position, The present invention relates to an automobile headlamp that can easily adjust the irradiation angle of the headlamp to the regular position when the headlamp is not in the regular position.

[Problems to be Solved by Prior Art and Invention]

A conventional headlamp of this type is disclosed in US Pat.
As shown in No. 495 and No. 4802067, a level body consisting of a bubble tube is attached to a lamp body / reflector unit that has a reflector integrally formed on the inner peripheral surface, and the horizontal position of the level level is adjusted to the headlamp. There is known a technique in which the irradiation angle of the headlamp can be adjusted by an aiming mechanism while making the irradiation axis coincide with the irradiation axis of (1) while observing the scale (scale where bubbles are located) of the level.

However, when aiming, there is no problem when aiming with the bulb unlit and adjusting to the scale of the level, but when aiming with the bulb lit, the bubble position should be set correctly. It is a problem not shown. That is, the above-mentioned conventional level has a structure in which a bubble tube is housed in a level casing made of synthetic resin, and is attached to a lamp body / reflector unit made of synthetic resin. Therefore, the amount of heat transferred to the bubble tube of the level with the lighting of the valve is different between the side closer to the valve that is the heat source and the side away from the valve, and as a result, convection occurs in the filling liquid in the bubble tube. Due to this convection, the bubbles move, and there is a problem that they are displaced from the horizontal position where the bubbles should originally be located.

The present invention has been made in view of the above-mentioned problems of the prior art,
It is an object of the present invention to provide a headlamp for an automobile equipped with a spirit level having a small measurement error by preventing each difference in the amount of heat transferred to each region of the bubble tube.

[Means for Solving the Problems]

In order to achieve the above object, in the vehicle headlamp according to claim (1), a tilting member that sets an irradiation direction of the lamp is tilted up and down and left and right with reference to a reference member of the headlamp. Thus, in a tilting member movable type headlamp capable of adjusting the irradiation angle of the headlamp, in a structure in which a linear bubble tube is housed in a synthetic resin casing at a predetermined position of the tilting member, the headlamp irradiation angle A level is provided to measure the tilt in the vertical direction, and the level holder is formed on the leveling surface of the tilting member to support the casing of the level and separate the level from the leveling surface. The heat transfer member, which is fixed to the tilting member and whose one end is fixed to the tilting member and whose other end is in contact with a predetermined region of the casing where heat from the valve, which is a heat source, is difficult to transfer It is obtained so as to interposed between pacing.

Also, in the automobile headlamp according to claim (2), in the means of claim (1), the bubble tube is suspended and supported on the back side of the bubble tube holder of the level, and is housed in the casing. An adiabatic air layer is formed between the casing and the casing.

Further, in claim (3), the reflector movable headlamp, wherein the reference member is the lamp body, and the tilting member is a reflector that can tilt in the lamp body,
The means of either claim (1) or (2) is applied.

Further, in claim (4), the unit movable type headlamp in which the reference member is the lamp housing and the tilting member is the lamp body / reflector unit integrally formed with the reflector on the inner peripheral surface, is provided. Either means of (2) is applied.

[Action]

When the valve is lit, the amount of heat that is inversely proportional to the length of the heat transfer path is transferred to each region of the level casing through the tilting member, but the heat transfer path is long and the amount of heat is transferred. Since the heat on the tilting member side is positively transferred to the difficult casing region via the heat transfer member interposed between the tilting member and the casing, the amount of heat transfer in each region of the casing is smoothed. Therefore, a substantially uniform amount of heat is transferred to each region of the bubble tube, and convection is suppressed from occurring in the filling liquid in the bubble tube.

According to claim (2), the amount of heat transfer in each region of the casing is smoothed by the heat transfer member, and the heat transfer to the bubble tube is hindered by the adiabatic air layer surrounding the bubble tube. The amount of heat transferred is reduced and further smoothed.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 9 show an automobile headlamp of a movable reflector type in which a reference member is a lamp body and a tilting member is a reflector. FIG. 1 shows a movable reflector in which an irradiation angle adjusting device is assembled. Type headlamp front view, FIG. 2 is a plan view of the same headlamp, and FIG. 3 is a horizontal sectional view of the same headlamp shown by further cutting a part thereof (a section taken along line III-III shown in FIG. 1). FIG. 4 is a vertical cross-sectional view of the headlamp (a cross-sectional view taken along the line IV-IV shown in FIG. 1), and FIG. 5 is a measuring instrument for measuring the inclination of the horizontal illumination angle of the headlamp. FIG. 6 is a vertical cross-sectional view of the assembly part (cross-sectional view taken along the line V-V shown in FIG. 1), and FIG. 6 is an assembly part of a level, which is a measuring device for measuring the inclination of the vertical irradiation angle of the headlamp. Fig. 7 is a vertical sectional view of Fig. 1 (a sectional view taken along the line VI-VI shown in Fig. 1). Perspective view, enlarged longitudinal sectional view of FIG. 8 is Level, Fig. 9 is an enlarged cross-sectional view of a spirit level (enlarged sectional view taken along line IX-IX shown in FIG. 8).

In these drawings, reference numeral 2 is a container-shaped lamp body, a reflector 4 is assembled therein, and a front lens 6 is assembled in a rectangular front opening of the lamp body 2 to be integrated as a headlamp. There is.

As shown in FIGS. 1, 3, and 4, the reflector 4 includes a ball joint 10 and three adjusting screws 20, 30.
Supported by dots. The ball portion 12 side of the ball joint 10 is supported by the reflector 4 side, and the reflector 4 can swing about the ball joint 10. The adjusting screws 20 and 30 are both rotatably supported by the lamp body 2, and the nuts 22 and 32 on the reflector 4 side are also supported.
And the nuts 22 and 32 are moved back and forth along the adjusting screws 20 and 30 by rotating the adjusting screws 20 and 30, respectively, whereby the inclination of the reflector 4 is changed. Reference numeral 14 is a socket that supports the ball portion 12, and is fixedly supported by a bracket 16 fixed to the back side of the reflector 4. Also adjusting screw
The nuts 22, 32 to which 20 and 30 are screwed are supported by brackets 26 and 36 protruding from the back surface of the reflector 4. Reference numerals 24 and 34 are snap rings, reference numerals 27 and 37 are O-rings, and reference numerals 28 and 38 are flange portions projecting from the adjusting screws 20 and 30.

The support point of the reflector 4 by the adjusting screw 20 (the screwing portion of the adjusting screw 20 and the nut 22) is located on the horizontal axis Lx which is orthogonal to the irradiation axis 1 of the valve 41 described later and passes through the ball joint 10. , The supporting point of the reflector 4 by the adjusting screw 30 (the screwing part of the adjusting screw 30 and the nut 32)
Is orthogonal to the irradiation 1 of the lamp and is located on the vertical axis Ly passing through the ball joint 10. Therefore, the turning of the adjusting screw 20 causes the reflector 4 to tilt about the vertical axis Ly, so that the tilt of the reflector 4 in the left-right direction, that is, the irradiation angle of the headlamp in the left-right direction can be adjusted. On the other hand, the turning of the adjusting screw 30 causes the reflector 4 to tilt about the horizontal axis Lx orthogonal to the vertical axis Ly, and the tilt of the reflector 4 in the vertical direction, that is, the irradiation angle of the headlamp in the vertical direction can be adjusted. . Two adjusting screws like this
The tilt adjustment of the reflector 4, that is, the irradiation angle of the headlamp can be adjusted by 20, 30.

Further, in FIG. 3, reference numeral 40 is a valve socket in which a valve 41 is connected and integrated. An opening 2a for attaching and detaching a bulb socket is formed on the back side of the lamp body 2, and the bulb socket 40 is formed on the rear top of the reflector 4 through the back side opening 2a of the lamp body. It is inserted in the socket hole 4A. Socket hole 4A
A rear protruding portion 4C is formed around a cylindrical rear protruding portion 4B that forms a rubber cover 46 is attached between the rear protruding portion 4C and the peripheral portion of the opening 2a of the lamp body. . The locking cap 47 for pressing and fixing the valve socket 40 in the socket hole 4A is the inner peripheral edge of the rubber cover 46.
The seal of the opening 2a of the lamp body is secured by pressing the 46a closely to the rear protrusion 4C. Reference numeral 42 is a base portion to which the valve 41 is attached, and reference numeral 44 is a cylindrical connector portion provided with a connection terminal inside.

Further, in FIGS. 1 to 4, reference numeral 3 is a lamp body 2.
A seal groove 3a is formed in the peripheral edge of the front opening of the front side, and the sealing agent 3a is loaded in the seal groove 3 to engage the legs of the front lens 6. Reference numeral 7 is a clip for mechanically fastening the front lens 6 and the lamp body 2.

In FIGS. 1 to 3 and 5, reference numeral 50 denotes a horizontal axis.
This is a first tilt measuring device which is provided at a horizontal position including Lx and measures the tilt of the reflector 4 in the left-right direction, that is, the tilt of the headlamp in the irradiation direction. Lamp body 2
As shown in FIG. 2, a cylindrical protruding portion 2b integrally formed with the lamp body protrudes toward the reflector 4 inside the recessed portion 4a formed in the left corner area of the upper wall of the reflector 4. It extends above. And the inclination measuring device 50 is assembled to the lamp body protruding portion 2b,
It is arranged parallel to the irradiation axis 1 of the lamp. Inclinometer
The reference numeral 50 includes a cylindrical support member 52, a rod member 54 inserted into the support member 52, and a compression coil spring 56 in the support member 52 for biasing the rod member 54 forward.

A female screw member 51 is fixed to the tip of the lamp body protruding portion 2b, and a transparent support member 52 made of synthetic resin is attached to the female screw member 51.
Are screwed together. A bulging portion 53 is formed at the rear end of the support member 52, and an O-ring 55 that seals the sliding surface with the lamp body protruding portion 2b is attached to the outer periphery of the bulging portion 53. A cap 58 having a driver engaging portion 59 is welded to and integrated with the bulging portion 53, and the support member 52 is rotated with respect to the female screw member 51 by a driver (not shown). The protruding position of the support member 52 with respect to the lamp body 2 can be moved and adjusted in the axial direction.

The rod member 54 inserted into the support member 52 is a stepped rod, and the small-diameter portion 61 of the rod projects forward by the compression coil spring 56 and is in a biased contact state with the rear surface of the standing wall 4c of the reflector 4. There is. And a transparent support member
A reference line 52a that revolves around the outer periphery of the tip of 52 (see FIG. 5)
On the other hand, on the other hand, the rod small diameter part 61 has a linear scale in the axial direction.
Reference numeral 62 indicates that when the reflector 4 tilts about the vertical axis Ly, the rod member 54 also slides back and forth in the axial direction accordingly, and the scale at the reference line 52a position fluctuates. Further, as shown in FIG. 5, the rod small-diameter portion contact surface 4c ₁ of the standing wall 4c is a curved surface having a radius R centered on the horizontal axis Lx, and depending on the tilting of the horizontal axis Lx of the reflector 4, The scale of the tilt measuring device 50 of No. 1 is designed not to change. The zero point 62a of the scale 62 is set to coincide with the position of the reference line 52a when the inclination of the reflector 4 in the left-right direction is appropriate, and the scale of the position of the reference line 52a is the amount of inclination of the reflector 4 in the left-right direction ( The amount of inclination of the irradiation angle of the headlamp in the left-right direction is represented.

And the reference line 52a which is the scale reading point of the inclination measuring device 50
A peep window 90 is formed in the lamp body region corresponding to the position, and the scale can be read through the peep window 90. That is, the peep window 90 has a structure in which the transparent convex lens cap 94 is inserted into the opening 92 formed in the lamp body 2, and the scale of the tilt measuring device 50 can be enlarged and read. There is.

In FIGS. 1 to 3 and FIGS. 6 to 9, reference numeral 70
Is a level that is a second tilt measuring device for measuring the vertical tilt of the reflector 4, that is, the vertical tilt of the irradiation angle of the headlamp, and is formed in the right corner area of the upper wall of the reflector 4. It is arranged on the recess 4d.

The level 70 has a structure in which a straight bubble tube 80 is housed and integrated in a level casing 71, and is attached and fixed to the upper wall of the reflector by four attaching screws 73a. The level casing 71 is a synthetic resin molded body, and is formed of a rectangular container-shaped casing body 72 that opens upward, and four bracket portions 73 that are formed to extend laterally of the casing body 72. The casing body 72 has a size capable of accommodating the bubble tube 80, and the bracket portion 73 is formed with an insertion hole 73b into which the mounting screw 73a is inserted.
On the other hand, a horizontal extending portion 5 protruding rearward is formed on an upper wall of the reflector 4, and four boss portions 5a, which are seat surfaces for carrying a level, are formed on the horizontal extending portion 5 so as to project. .
A hole 5b for inserting a screw is formed in the upper end surface of each boss 5a, and the bracket 73 of the spirit level is fixed by screwing a mounting screw 73a into the hole 5b.

In this way, the bracket portion 73 is carried by the boss portion 5a, and the level casing 71 is arranged in a state of floating above the horizontal extension portion 5 with a gap S therebetween (see FIG. 3). Therefore, heat on the reflector side due to lighting of the valve 41 is not easily transmitted to the level casing 71, and the bubble tube 80 is suppressed from being heated by the heat.

At the upper opening of the casing main body 72, a lid 74, which is a bubble tube holder made of a synthetic resin having high elasticity such as U polymer or polyacetal having a bubble tube 80 attached to the back side, is provided with a concave-convex lance engagement and an adjusting screw 78. It is fixed by mounting. That is, a rectangular opening 72b is formed on the side wall 72a at the rear end of the casing main body 72, and a hook 7 that projects vertically downward at the rear end of the lid 74 and engages with the opening 72b on the casing side.
5a is formed. At the rear end of the lid, hook
A pair of hooks is provided on both sides of 75a with a slit 75b.
75c is formed to extend. When the hook 75a is engaged with the opening 72b in a state where the hook 75c is carried by the side wall upper end surfaces 72a ₂ on both sides of the central protrusion 72a _{1 at the} rear end of the casing, as shown in FIG. The hook portion 75c and the hook 5a are elastically deformed in a cantilever manner in mutually opposite directions, and the rear end portion of the lid body is prevented from coming off in the vertical direction and is elastically supported in the vertical direction. There is. In this way, between the rear end of the lid and the side wall 72a at the rear end of the casing, an unevenness formed by an opening 72b for preventing the rear end of the lid from coming off and elastically supporting it, a hook 75a, and a hook 75c. A lance elastic engagement portion is formed.

On the other hand, a screw insertion hole 74a is opened in the front end portion of the lid 74,
In addition, a screw hole 76a is provided at the front of the bottom surface of the casing body 72.
An open boss portion 76 is formed so as to project. A compression coil spring 77 is arranged around the boss portion 76, and the lid front end portion and the boss portion 76 are screwed together by the adjusting screw 78, whereby the lid front end portion is vertically moved with respect to the casing body 72. It is elastically supported. By adjusting the screwing amount of the adjusting screw 78, the inclination of the lid 74, that is, the inclination of the bubble tube 80 (the position of the bubble) described later can be adjusted.

In addition, on the back side of the lid 74, a straight type bubble tube in which bubbles 84 are enclosed.
80 is attached by a sandwiching piece 81, and the surface of the bubble tube 80 on which the scale 82 is formed is exposed through a rectangular window 79 formed in the central portion of the lid. Reference numeral 82a indicates the scale zero point position. Bubble tube 8
The holding piece 81, which is a spring member for holding 0, has a lid 74
It is integrally molded with the outer peripheral curved surface of the bubble tube 80, as shown in FIG. In this way, the bubble tube 80 is supported in a state of being suspended in the casing body 72 by the holding piece 81 of the lid 74, and a heat insulating air layer S ₁ is formed between the casing body 72 and the bubble tube 80. Therefore, the heat on the casing side is less likely to be transmitted to the bubble tube 80. In addition, hold the bubble tube 80 with
To attach the bubble tube 80 to the lid 74, the bubble tube 80 can be attached to the lid 74 with one touch by inserting the bubble tube 80 from the tip end side of the holding piece 81.

Further, reference numeral 88 is an aluminum heat transfer plate interposed between the upper wall of the reflector and the bottom surface of the casing and arranged along the casing main body 72. The heat of the reflector side is positively applied to the rear end of the casing main body 72. It is intended to be transmitted. The heat transfer plate 88 is attached to the upper wall of the reflector 4 by insert molding and extends on the horizontal extending portion 5 along the casing body 72. The front end portion 88a of the heat transfer plate 88 penetrates the upper wall of the reflector and is exposed inside the reflector, and the rear end portion 88b is bent upward and is in contact with the bottom surface of the casing main body 72 on the rear end side.

Next, the operation of the heat transfer plate 88 will be described. As shown in FIG. 8, the front end side of the casing main body 72 is located on the upper wall of the reflector and has a large amount of heat (the valve is used as a heat source) in comparison with the rear end of the casing main body protruding to the rear of the reflector. , Radiant heat from the reflector and the boss
The heat transmitted via the 5a and the bracket portion 73) is transmitted. For this reason, heat tends to be trapped in the front end portion side of the casing main body, but since the heat of the reflector side is positively transferred to the rear end portion of the casing by the heat transfer plate 88, the amount of heat transferred to the casing main body 72 is the length of the casing. It becomes almost uniform in the direction. Further, as described above, the heat insulating air layer S ₁ is formed around the bubble tube 80 housed in the casing body 72, and this heat insulating air layer S ₁ is a bubble tube for heat on the casing body 72 side. The transfer to 80 is suppressed, and the amount of heat transferred to bubble tube 80 is smoothed. Therefore, the amount of heat transferred from the casing main body 72 to the bubble tube 80 is reduced and becomes substantially uniform in the longitudinal direction of the bubble tube. For this reason, the inside of the bubble tube is heated uniformly, and convection does not occur in the charging liquid, and there is no problem that the bubbles move due to heat and accurate measurement cannot be performed unlike the conventional case.

Next, the case of assembling this level 70 to the reflector 4 will be described with reference to FIG.

First, hold the bubble tube 80 with the holding piece 81,
Is assembled to the lid 74. Next, the rear end portion of the lid 74 is engaged with the side wall 72a at the rear end of the casing 71 by a concave-convex lance, and the front end portion of the lid is screwed to the boss portion 76 by the adjusting screw 78 to be integrated as the level 70. Then the casing 71
The bracket portion 73 is aligned with the boss portion 5a on the reflector side, and the bracket portion 73 is screwed to the boss portion 5a with the mounting screw 73a. After the level 70 has been attached to the upper wall of the reflector, the bubbles 84 of the level 70 are linearly scaled when the reflector 4 is tilted in the vertical direction, that is, when the irradiation angle of the headlamp is in the vertical vertical position. Adjust it with the adjusting screw 78 so that it will be at the zero point position 82a of the graduation zero point 82a. As shown in FIG. 6, an opening 93 is also formed in a region of the lamp body 2 corresponding to the level 70, and a convex lens cap 94 is attached to the opening 93 to form a peephole 90 for reading the scale. The peep window 90 to the level 70
The tilt amount indicated by can be read. The adjusting screw 78 is rotated by removing the convex lens cap 94 and inserting a screw rotating tool through the opening 93.

Next, a procedure for adjusting the inclination measuring devices 50, 70 performed when the headlamp is assembled to the vehicle body and a procedure for adjusting the irradiation angle of the headlamp performed thereafter will be described.

As a single headlamp, when the zero point position 62a of the scale of the rod member 54 of the first inclination measuring device 50 coincides with the reference line 52a position, the light distribution characteristic of the headlamp in the left-right direction becomes an appropriate position, and the second The vertical light distribution characteristic of the headlamp is set to an appropriate position when the bubble 84 of the level 70, which is the inclination measuring device, reaches the zero point position 82a of the linear scale 82.

When the headlamp incorporating the first and second inclination measuring devices 50 and 70 is mounted on the vehicle body, the scale display of each inclination measuring device does not come to the proper position due to various errors. Therefore, it is necessary to adjust the scales of the first and second inclinometers to appropriate states.

Next, an example of this scale adjustment method will be described.

In the first inclination measuring device 50, the automobile is positioned at a horizontal position, the light distribution screen is set at a predetermined position in front of the automobile, and the headlamp is turned on. Then, the adjusting screw 20 is rotated to adjust the light distribution of the headlamp so as to come to a predetermined position in the left-right direction on the light distribution screen (so that the irradiation axis 1 of the headlamp coincides with the axle). However, at this time, the reference line position 52a and the scale zero point position 62a do not match due to variations in the lamp mounting surface on the vehicle body side. Then, the support member 52 is pivotally operated by a driver and moved back and forth in the axial direction so that the scale zero point position 62a of the first inclination measuring device coincides with the reference line position 52a. In this way, when the irradiation angle of the headlamp in the left-right direction is at a proper position, the scale of the reference line position 52a of the first inclination measuring device 50 is adjusted so as to display the zero point (zero point adjustment).

On the other hand, in the level 70 which is the second inclination measuring device, the adjusting screw 30 is rotated to adjust the hot zone of the headlamp to a predetermined position in the vertical direction on the light distribution screen. However, the bubble position may not coincide with the zero point position 82a of the scale 82 due to variations in the lamp mounting surface on the vehicle body side. In such a case, the adjusting screw 78 is rotated to adjust the zero point so that the bubble comes to the zero point position 82a of the scale. In this way, when the vertical irradiation angle of the headlamp is at a proper position, the bubble 83 of the level instrument 70 which is the second inclination measuring device is adjusted (zero point adjustment) so as to display the zero point 82a of the scale.

After that, the user adjusts the irradiation angle of the headlamp. Then, looking inside the headlamp from above the upper side wall of the front lens 6, the reference line position 52a of the first inclination measuring device 50 does not indicate the zero point position 62a of the scale, or
The bubble 84 of the level 70, which is the tilt measuring instrument of the
If there is a deviation from 82a, the amount of inclination of the lamp body in the left-right direction or the up-down direction, that is, the deviation of the irradiation angle of the headlamp in the left-right direction or the up-down direction can be read from these deviation amounts. And in this case,
The adjusting screw 20 or 30 is rotated, respectively, so that the scale zero point position 62a comes to the reference line position 52a in the first inclination measuring device 50, and the level indicator 70 which is the second inclination measuring device,
The bubbles are adjusted so as to come to the scale zero point position 82a. In this way, the irradiation angle of the headlamp in the left-right direction or the vertical direction can be adjusted to be appropriate.

In the above embodiment, the heat transfer plate 88 is integrated with the upper wall of the reflector 4 by insert molding, but as shown in FIG.
The structure may be such that A is fixed to the reflector upper wall by the mounting screw 89.

FIG. 11 shows an embodiment in which the present invention is applied to a unit movable type headlamp in which the reference member is the lamp housing and the tilting member is the lamp body / reflector unit (hereinafter referred to as the lamp body unit). .

A first inclination measuring device 250 for measuring the horizontal inclination of the lamp body unit 202 (the inclination of the headlamp horizontal illumination angle) in a horizontal plane including the horizontal axis Lx on the upper wall 202a of the lamp body unit 202. And a level that is a second inclination measuring device for measuring the vertical inclination of the lamp body unit 202 (the inclination of the vertical irradiation angle of the headlamp).
270 are provided respectively.

In the first inclination measuring device 250, a transparent support member 52 is assembled to a mounting surface on the lamp housing 200 side via a holding member 252, and a graduated rod member 54 projects from an upper wall 202a of the lamp body unit 202. It is urged and abutted against the standing wall 204 provided. The abutment surface 204a of the small diameter portion 61 of the standing wall 204 is the horizontal axis L.
The first inclination measuring device 250, which is an arc curved surface centered at x
Is not affected by the vertical tilt of the lamp body unit 202.

The level gauge 270, which is the second inclination measuring instrument, has the same structure as the level gauge 70 shown in the first embodiment, and has a horizontal extension portion 20 projectingly formed on the upper wall 202a of the lamp body unit.
Mounted and fixed to 5. Reference numeral 240 is a valve socket, and reference numeral 247 is a locking cap for fixing the valve socket 240 in the socket hole.

Other configurations are the same as those of the movable reflector type described above, and the description thereof will be omitted by giving the same reference numerals.

[Effect of device]

As is apparent from the above description, in the vehicle headlamp according to the present invention, the reference member (reflector movable) for the tilting member (reflector movable type reflector, unit movable type lamp body / reflector unit, the same applies hereinafter). The vertical tilt with respect to the lamp body for the type and the lamp housing for the unit movable type (hereinafter the same) applies to the spirit level, and the tilt amount of the tilting member from this spirit level in the vertical direction, that is, the irradiation angle of the headlamp The amount of tilt in the direction can be read.

Then, in order to adjust the vertical irradiation angle of the headlamp, it is sufficient to tilt the tilting member in the vertical direction so as to adjust the aiming so that the bubble of the spirit level is at a predetermined position.
Anyone can easily adjust the vertical illumination angle of the headlamp.

When the valve is turned on, the amount of heat that is inversely proportional to the length of the heat transfer path is transferred to the casing of the level via the tilting member, but for example, the heat transfer path is long and the amount of heat is difficult to transfer. Since the heat on the tilting member side is positively transferred to the casing region via the heat transfer member interposed between the tilting member and the casing, the heat transfer amount in each region of the casing is smoothed. For this reason, a substantially uniform amount of heat is transferred to each region of the bubble tube, and convection does not occur in the filling liquid in the bubble tube, and the bubble does not affect the heat generation of the valve and the tilt amount of the tilting member is affected. The headlamp's vertical irradiation angle can be measured and adjusted accurately.

In claim (2), the heat transfer member smoothes the heat transfer amount in each region of the casing, and the heat transfer to the bubble tube is hindered by the adiabatic air layer surrounding the bubble tube, so that it is transferred to each region of the bubble tube. The amount of heat transfer is further smoothed. Therefore, it is possible to obtain a headlamp with a level that causes almost no measurement error due to heat generation of the bulb, and it is possible to more accurately adjust the irradiation angle in the vertical direction of the headlamp.

[Brief description of drawings]

FIG. 1 is an embodiment applied to a movable reflector headlamp of the present invention. FIG. 1 is a front view of the same headlamp, FIG. 2 is a plan view of the same headlamp, and FIG. 3 is a line III-II shown in FIG.
A sectional view taken along I, FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 1, and FIG. 5 is a longitudinal sectional view of the first inclination measuring instrument assembly portion,
1 is a sectional view taken along line V-V shown in FIG. 1, and FIG. 6 is a longitudinal sectional view of a level gauge assembly portion which is a second inclination measuring device, and a sectional view taken along line VI-VI shown in FIG. , FIG. 7 is an exploded perspective view of a level gauge which is a second tilt measuring device, FIG. 8 is an enlarged vertical sectional view of the level gauge, and FIG. 9 is an enlarged transverse sectional view of the level gauge (see FIG. 8). FIG. 10 is a vertical sectional view of a leveling device assembly portion, which is a main part of another embodiment of the present invention, and FIG. 11 shows the present invention as a unit movable headlamp. It is a top view of the same headlamp which fractured | ruptured and shows one part in the applied example. 2 ... Lamp body that is a reference member, 4 ... Reflector that is a tilting member, 5a ... Boss that is a carrying part of the level, 6 ... Front lens, 10 ... Swinging fulcrum of the reflector that is a tilting member , 20 ... Adjusting screw for tilting the reflector, which is a tilting member, in the left-right direction, 30 ... Adjusting screw for tilting the reflector, which is a tilting member, in the vertical direction, 50, 250 ... Headlamp Inclination measuring device 70,270 for measuring the inclination of the irradiation angle of the left and right direction of the headlamp, 70,270 ..
… Level casing casing, 80… Bubble tube, 84… Bubbles, 88, 88A… Heat transfer plate that is a heat transfer member, 200…
Lamp housing that is a reference member, 202 ... Lamp body / reflector unit that is a tilting member, Lx ... Horizontal axis, Ly ... Vertical axis, S ... Formed between level casing and level mounting surface Gap, S ₁ ... Insulating air layer surrounding the bubble tube.

Claims (4)

[Scope of utility model registration request] 1. A tilting member movable type head capable of adjusting an irradiation angle of a headlamp by tilting a tilting member for setting an irradiation direction of a lamp vertically and horizontally with reference to a reference member of a headlamp. In the lamp, at a predetermined position of the tilting member, a linear bubble tube is housed in a synthetic resin casing, and a level for measuring the vertical tilt of the irradiation angle of the headlamp is provided. The casing of the spirit level is carried by a spirit level carrying portion projectingly formed on the leveling surface of the tilting member and is arranged in a state of being separated from the leveling surface, and there is one end between the tilting member and the leveling casing. For a motor vehicle, a part is fixed to the tilting member, and a heat transfer member is provided, the other end of which is in contact with a predetermined region of the casing where heat from the valve, which is a heat source, is hard to be transferred. Ddoranpu. 2. The bubble tube is suspended and supported on the back side of the bubble tube holder and accommodated in a casing, and a heat insulating air layer is formed between the bubble tube and the casing. ) An automobile headlamp as described above. 3. The headlamp for an automobile according to claim 1, wherein the reference member is a lamp body, and the tilting member is a reflector that can tilt within the lamp body. 4. The reference member is a lamp housing, and the tilting member is a lamp body / reflector unit integrally formed with a reflector on an inner peripheral surface thereof. Headlamps for cars.