JP3428343B2 - Vehicle lighting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp in which a light source bulb such as a discharge lamp is removably attached to a reflector via a spring, and more particularly to centering the light source bulb and reflecting the light source bulb. The present invention relates to a vehicular lamp that can be attached to a vehicle with high accuracy.

[0002]

2. Description of the Related Art This type of vehicular lamp generally comprises a light source bulb, a reflector for reflecting light from the light source bulb to the front side, and a spring for detachably attaching the light source bulb to the reflector. The light source bulb is
It is composed of a light emitting portion, a collar portion provided on the rear side of the light emitting portion, and a tubular portion provided on the rear side of the collar portion. The reflector is a through hole for inserting the light emitting portion from the rear side to the front side, and an inner peripheral surface of the through hole, and a small diameter through hole on the front side and a large diameter through hole on the rear side through a step portion. And a spring attachment portion and a spring engagement portion. The spring comprises a mounting portion rotatably mounted on the spring mounting portion, an engaging portion removably engaged with the spring engaging portion, and a flange pressing portion for pressing the flange portion. It is configured.

The light emitting portion of the light source bulb is inserted from the rear side to the front side in the through hole of the reflector, and the collar portion and the tubular portion of the light source bulb are set in the large diameter through hole of the reflector.
Moreover, the front surface of the collar portion is applied to the receiving portion of the reflector. Then, by engaging the engaging portion of the spring with the spring engaging portion of the reflector while applying the flange pressing portion of the spring to the rear surface of the flange, the flange pressing portion elastically abuts the rear surface of the flange. The front surface of the collar portion is pressed against the receiving portion. As a result, the light source bulb is detachably attached to the reflector via the spring.

[0004]

In the above vehicular lamp, it is important to attach the light source bulb to the reflector with high accuracy. In particular, when the light source bulb is a high-intensity discharge lamp, it is necessary to mount it with higher accuracy.

It is an object of the present invention to provide a vehicular lamp in which the light source bulb is centered and the light source bulb can be attached to the reflector with high accuracy.

[0006]

In order to achieve the above object, the present invention provides a slight gap between the inner peripheral surface of the large-diameter through hole of the reflector and the outer peripheral surface of the collar portion of the light source bulb. is provided, in its inner peripheral surface of the large径透holes, and the centering portion of the light source bulb is provided on at least one of the outer peripheral surface of the flange portion, the Sprint grayed may song folding spring member
The mounting part that is in the shape of a U and is in the middle, and the mounting part
Collar part pressing part that presses the collar part with both sides spreading outward
And the end of the collar pressing part is narrowed inward and parallel.
And is detachably engaged with the spring engaging portion 2
One of a engaging portion, and pressing the tubular portion in the centering portion and main features and TURMERIC rows centering of the light source bulb.

As a result, the light source bulb is centered by pressing the light source bulb toward the centering portion side through the cylinder portion of the spring, so that the light source bulb is attached to the reflector with high accuracy. be able to.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicular lamp of the present invention will be described below with reference to the accompanying drawings. Note that, in the drawings, hatching is omitted for the sake of understanding the drawings. In the figure, 1 is a light source bulb. The light source bulb 1 uses a discharge lamp (for example, a high pressure metal vapor discharge lamp such as a metal halide lamp) as this example. As shown in FIG. 4, the discharge lamp 1 includes a glass bulb 11 having a light emitting portion 10, a disc-shaped flange portion 12 provided on the rear side of the glass bulb 11, and a rear side of the flange portion 12. And a cylindrical portion 13 having a cylindrical shape. The glass bulb 11, the collar portion 12 and the tubular portion 13 have a central axis O-
It is concentric with O as the center, and the light emitting portion 10 is on the central axis OO.

On the front surface of the collar portion 12, three hemispherical small convex portions 14 are integrally provided at equal intervals. Further, a rectangular concave portion 16 for preventing vertical mis-assembly is provided on the upper portion of the collar portion 12 (on the side opposite to the power supply wire 15). Further, a connector portion 17 is provided at the rear of the tubular portion 13.
Is provided. A power supply side connector (not shown) is detachably connected to the connector portion 17.

In the figure, reference numeral 2 is a reflector for reflecting the light from the light emitting portion 10 of the discharge lamp 1 to the front side.
As shown in FIGS. 2 and 3, the reflector 2 has a concave mirror on the front surface to the inner surface side (for example, the vertical cross section of FIG. 3 is an elliptical surface, and the horizontal cross section (not shown) is a parabolic surface or a deformed parabolic surface). It consists of 20. As a result, the reflector 2 has the first
It has a focal point F and a second focal point (a focal line on a horizontal section) not shown. In the figure, ZZ is the optical axis of the concave mirror 20.

The front part of the reflector 2 is opened, and the light emitting part 10 and the glass bulb 11 of the discharge lamp 1 are inserted into the rear part of the reflector 2 from the outer rear side to the front side of the concave mirror 20 ( Circular through holes 21 and 22 for inserting and removing are opened.

Further, on the inner peripheral surface of the through hole 21 of the reflector 2, between the small diameter through hole 21 on the front side and the large diameter through hole 22 on the rear side through the step portion, an annular receiving portion is formed. A (step) 23 is provided. On the upper part of the inner peripheral surface of the large-diameter through hole 22 described above, a quadrangular convex portion 24 for preventing vertical mis-assembly is provided.

Further, on the rear surface of the reflector 2 (periphery of the large-diameter through hole 22), a spring mounting portion 25 having a concave groove is formed.
Is provided, and two spring engaging portions 26 are provided in the lower portion. As shown in FIG. 12, the two spring engaging portions 26 are substantially U-shaped with the front side and the inner side opened when viewed from the bottom surface.

In the figure, 3 is a spring. This spring 3 is, as shown in FIG. 2, FIG. 3 and FIG.
A mounting member 30 formed by bending a spring member of a round bar and having a U-shape in the middle, and two flange portion pressing members formed by expanding both sides of the mounting member 30 to the outside and curving hemispherically toward the front side. The part 31, two engaging parts 32 in which the ends of the two flange pressing parts 31 are narrowed inward and parallel to each other, and the ends of the two engaging parts 32 are curled. It is composed of two image capturing units 33.

By mounting the mounting portion 30 of the spring 3 on the spring mounting portion 25 of the reflector 2, the ground terminal 34 is set on the spring mounting portion 25, and the ground terminal 34 is fixed to the reflector 2 by the screw 35. The attachment portion 30 of the spring 3 is attached to the reflector 2 so as to be rotatable about the axis of the intermediate portion of the attachment portion 30. Reference numeral 36 in the figure is a ground wire connected to the ground terminal 34.

When the discharge lamp 1 is detachably attached to the reflector 2 via the spring 3, first, as shown in FIG.
Also, as shown in FIG. 3, the spring 3 is placed at a position separated from the large-diameter through hole 22 of the reflector 2. next,
As shown in FIGS. 5 and 6, the recess 16 for preventing the vertical mis-assembly from the discharge lamp 1 and the projection 24 for preventing the vertical mis-assembly from the reflector 2, and the semi-circular recess 18 of the discharge lamp 1 and the half of the reflector 2 are formed. The light emitting portion 10 of the discharge lamp 1 and the glass bulb 11 are fitted with the circular convex portion 27, and the through hole 21 of the reflector 2 is provided.
22 is inserted from the rear side to the front side, and the light emitting section 1 of the discharge lamp 1 is inserted.
0 and the glass bulb 11 are positioned on the concave mirror 20 side of the reflector 2.

At this time, it is possible to prevent the discharge lamp 1 from being erroneously mounted on the reflector 2 upside down by fitting the recessed part 16 for preventing the wrong mounting of the discharge lamp 1 and the protruding part 24 for preventing the wrong mounting of the reflector 2 from above and below. It is possible to determine the mounting position of the discharge lamp 1 with respect to the reflector 2, and
It serves as a rotation stopper for the reflector 2 of the discharge lamp 1. Moreover, depending on the standard, the outer diameter of the flange portion 12 (the inner diameter of the large-diameter through hole 22 of the reflector 2) is the same even if the type of the discharge lamp 1 is different. To this end, the semicircular recess 18 of the discharge lamp 1 described above
By changing the positions of the reflector 2 and the semicircular convex portion 27 of the reflector 2 for each type of the discharge lamp 1, the semicircular concave portion 1 of the discharge lamp 1 is changed.
8 and the semicircular convex portion 27 of the reflector 2 can be fitted together to prevent the discharge lamp 1 of a different type from being erroneously assembled to the reflector 2.

Further, the collar portion 12 and the tube portion 13 of the discharge lamp 1 are set in the large diameter through hole 22 of the reflector 2, and the small convex portion 14 on the front surface of the collar portion 12 of the discharge lamp 1 is received by the reflector 2. The discharge lamp 1 is temporarily set on the reflector 2 by hitting the portion 23. Then, as shown in FIGS. 7 and 8, the spring 3 is positioned on the rear side of the discharge lamp 1 (reference numeral 32 in FIG. 12).
(See A). Further, as shown in FIG. 9, the two photographing portions 33 of the spring 3 are photographed with a finger or the like to resist the spring force of the spring 3, and the two engaging portions 32 are moved in the directions of arrows in FIG. Then, the two flange pressing portions 31 are applied to the rear surface of the flange 12 while narrowing inwardly of the two spring engaging portions 26 (see reference numeral 32B in FIG. 12). Then, as shown in FIGS. 10 and 11, the two engaging portions 32 are respectively engaged with the two spring engaging portions 26 (see reference numeral 32C in FIG. 12).

Then, the two flange portion pressing portions 31 are replaced by the flange portion 12.
The three small convex portions 14 on the front surface of the flange portion 12 are elastically contacted with the rear surface, respectively, and are pressed by the receiving portion 23. as a result,
The discharge lamp 1 is detachably attached to the reflector 2 via the spring 3 with the front and rear positions of the light emitting unit 10 of the discharge lamp 1 and the focal point F of the reflector 2 being determined. Here, it is important to attach the discharge lamp 1 to the reflector 2 with high accuracy. In particular, when using the high-intensity discharge lamp 1 as the light source bulb as in this embodiment, it is necessary to mount it with higher accuracy.

Therefore, in the vehicular lamp of the present invention in this embodiment, as shown in FIGS. 5 to 11, the inner peripheral surface of the large-diameter through hole 22 of the reflector 2 and the collar portion 12 of the discharge lamp 1. A slight gap is provided between the outer peripheral surface and the outer peripheral surface. Further, two hemispherical small convex portions 4 as centering portions are provided in the lower portion (portion opposite to the spring mounting portion 25 of the reflector 2) of the inner peripheral surface of the large diameter through hole 22. There is. As shown in FIG. 2, the two centering convex portions 4 are
They are provided at intervals of a central angle of 90 ° about the optical axis Z-Z (intervals of 45 ° to the left and right with respect to the vertical line). In addition, the optical axis Z from the apex of the two centering convex portions 4
The distance A to -Z is the radius A of the collar portion 12 of the discharge lamp 1 described above.
Is almost the same as.

On the other hand, the above-mentioned spring 3 is provided with a cylindrical pressing portion 5 having an inwardly curved shape. As shown in FIGS. 7, 9 and 10, the tubular portion pressing portion 5 is provided closer to the mounting portion 30 than the flange portion pressing portion 31 of the spring 3. Further, as shown in FIG. 10, the tubular pressing portion 5 overlaps the inside of the tubular portion 13 in a state where the engaging portion 32 is engaged with the spring engaging portion 26 (FIG. 10). (See the chain double-dashed line in 10.)
As a result, when the engagement portion 32 of the spring 3 is engaged with the spring engagement portion 26 of the reflector 2, the tubular portion pressing portion 5 is always in the discharge lamp 1 as shown by the arrow in FIG.
The cylindrical portion 13 of is pressed against the two centering convex portions 4 side,
The outer peripheral surface of the flange portion 12 of the discharge lamp 1 is brought into contact with the two centering convex portions 4.

Since the vehicular lamp of the present invention in this embodiment has the above-mentioned structure, the spring 3 is engaged with the discharge lamp 1 temporarily set on the reflector 2 (see FIGS. 5 and 6). By engaging the portion 32 with the spring engaging portion 26 of the reflector 2 (see FIGS. 7 to 12), as described above, the flange pressing portion 31 of the spring 3 reflects the flange 12 of the discharge lamp 1 onto the reflector. The discharge lamp 1 is attached to the reflector 2 in a state where the front and rear positions of the light emitting portion 10 of the discharge lamp 1 and the focal point F of the reflector 2 are determined by pressing the receiving portion 23 of the second lamp 2.

On the other hand, the cylindrical portion pressing portion 5 of the spring 3 presses the cylindrical portion 13 of the discharge lamp 1 toward the two centering convex portions 4 and the outer peripheral surface of the collar portion 12 of the discharge lamp 1 is pressed. Since the two projections 4 are brought into contact with each other, the discharge lamp 1 is centered. That is, as shown in FIG. 1, the flange portion 12 of the discharge lamp 1 is pressed against two reference surfaces 6 having an opening angle of 90 ° in the direction of the arrow in the figure, and the outer peripheral surface of the flange portion 12 is divided into two reference surfaces. When they are brought into contact with the surface 6, the two contact points (the collar 12
The intersection of the two perpendicular lines 61 from the contact point between the outer peripheral surface of the and the reference surface 6) is the center of the collar 12 (the central axis Z- of the discharge lamp 1).
Z). Further, the distance A between the two reference surfaces 6 and the two perpendicular lines 61 is the radius A of the collar portion 12. Therefore, the collar portion of the discharge lamp 1 is provided on the two centering convex portions 4 which are spaced by a central angle of 90 ° and the distance A to the optical axis ZZ is substantially the same as the radius A of the collar portion 12. By bringing 12 into contact with each other as described above, the optical axis Z-Z coincides with the central axis O-O of the discharge lamp 1, that is, the discharge lamp 1 is centered.

Thus, the front and rear positions of the light emitting portion 10 of the discharge lamp 1 and the focal point F of the reflector 2 are determined, and the optical axis Z is set.
Since -Z and the central axis O-O of the discharge lamp 1 match, the light emitting unit 10 of the discharge lamp 1 can be accurately arranged at a predetermined position, for example, the focal point F of the reflector 2.

Further, in this embodiment, the discharge lamp is simply provided with the centering convex portion 4 on the inner peripheral surface of the large diameter through hole 22 of the reflector 2 and the cylindrical portion pressing portion 5 on the spring 3. No separate components are required since one centering mechanism is constructed.

Although the centering convex portion 4 is provided on the inner peripheral surface of the large-diameter through hole 22 of the reflector 2 in the above-described embodiment, it is provided on the outer surface of the collar portion 12 of the discharge lamp 1 or of the large diameter. Through hole 2
Centering portions may be provided on both the inner peripheral surface of 2 and the outer surface of the collar portion 12.

Further, in the above-mentioned embodiment, the concave mirror 20 of the reflector 2 has a single reflecting surface.
Complex reflecting surfaces such as so-called multi-reflectors (the reflecting surface is divided into multiple parts (multiple parts) by design with respect to the reference paraboloid of revolution, and the focal length is slightly changed for each part or the optical axis direction is slightly changed. It is also possible to use a reflector composed of a composite reflection surface formed by inclining to.

Further, although the project type headlamp has been described in the above embodiment, the vehicular lamp of the present invention can be used for other ordinary headlamps. The vehicle lamp of the present invention can also be used as a vehicle headlight, a front marking light for a railway vehicle (linear motor car), and the like.

Furthermore, in the above embodiment, the discharge lamp 1 is used as the light source, but other light sources (for example, an incandescent lamp such as a halogen lamp) may be used.

Furthermore, in the above-described embodiment, the portion for attaching the discharge lamp 1 to the reflector 2 (the through holes 21, 22, the receiving portion 23, etc.) is provided integrally with the reflector 2. Alternatively, the part may be a separate component such as a holder, and the holder or the like may be fixed to the reflector 2.

[0031]

As is apparent from the above, in the vehicular lamp of the present invention, a slight gap is provided between the inner peripheral surface of the large-diameter through hole of the reflector and the outer peripheral surface of the collar portion of the light source bulb. The centering portion of the light source bulb is provided on at least one of the inner peripheral surface of the large diameter through hole and the outer peripheral surface of the collar portion, and the center portion of the light source bulb is centered by pressing the tube portion toward the centering portion side by the spring. Since the tubular portion pressing portion for performing is provided, when the tubular portion pressing portion of the spring pushes the light source bulb toward the centering portion side through the tubular portion, the light source bulb is centered. Can be attached to the reflector with high precision.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a basic concept showing an embodiment of a vehicular lamp of the present invention.

FIG. 2 is a rear view of a portion of a reflector to which a discharge lamp is attached.

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

FIG. 4 is a side view of a discharge lamp as a light source bulb.

FIG. 5 is a partial rear view showing a state in which the discharge lamp is temporarily set on the reflector.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partial rear view of the state in which the spring is located on the rear side of the discharge lamp.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a partial rear view of the state before the engagement portion of the spring is engaged with the spring engagement portion of the reflector.

FIG. 10 is a partial rear view showing a state in which the spring engaging portion is also engaged with the spring engaging portion of the reflector.

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a partial bottom view showing a state in which the engagement portion of the spring is engaged with the spring engagement portion of the reflector.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Discharge lamp (light source bulb), 10 ... Light emitting part, 11 ... Glass bulb, 12 ... Collar part, 13 ... Cylindrical part, 14 ... Small convex part, 1
5 ... Power supply wire, 16 ... Vertical recessed assembly preventing recess, 17 ... Connector part, OO ... Central axis, 2 ... Reflector, 20 ... Concave mirror, 21 ... Small diameter through hole, 22 ... Large diameter through hole,
23 ... Receiving part, 24 ... Upward / downward misalignment preventing convex part, 25
Spring mounting portion, 26 ... Spring engaging portion, F ... Focus (first focus), ZZ ... Optical axis, 3 ... Spring, 30 ...
Mounting part, 31 ... Collar pressing part, 32 ... Engaging part, 33 ... Shooting part, 34 ... Ground terminal, 35 ... Screw, 36
... ground wire, 4 ... centering convex part (centering part), 5 ... cylindrical pressing part.

Claims (2)

(57) [Claims] 1. A light source bulb, A reflector that reflects the light from the light source bulb to the front side.
With Removably attach the light source bulb to the reflector
A spring, Equipped with The light source bulb is provided on the light emitting unit and on the rear side of the light emitting unit.
From the flange part and the tubular part provided on the rear side of the flange part.
Is configured, The reflector inserts the light emitting portion from the rear side to the front side.
And the inner peripheral surface of the through hole for
Between the front small diameter through-hole and the rear large diameter through-hole.
The receiving part, the spring mounting part and the spring engaging part.
Consists of, Previous When the engaging portion is engaged with the spring engaging portion,
The collar pressing portion elastically abuts the rear surface of the collar, and
By pressing the front surface of the collar portion against the receiving portion,
A light source bulb is attached to the reflector via the spring.
In a vehicle lamp that is detachably attached, There is a small gap between the inner peripheral surface of the large diameter through hole and the outer peripheral surface of the collar portion.
There is a drying gap and the inner circumference of the large diameter through hole.
Surface, at least one of the outer peripheral surface of the collar portion
Is provided with the centering portion of the light source bulb, The splineGu is,Bending the spring member,
The middle U-shaped mounting part and both sides of the mounting part are outside
Flange pressing portion that spreads over the flange and presses the flange, and the flange
The end of the pressing part is narrowed inward and parallel,
Two engaging portions detachably engaged with the spring engaging portion
With andBy pressing the tubular portion toward the centering portion side,
Center the light source bulbUh, A vehicle lamp characterized by the above. 2. The centering portion comprises two hemispherical small convex portions, and the two centering convex portions are provided on the inner peripheral surface of the large diameter through hole on the side opposite to the spring mounting portion. They are provided at a position with a center angle of 90 °, and the tubular portion pressing portion is provided on the side of the mounting portion, and always pushes the tubular portion toward the two centering convex portions. The vehicular lamp according to claim 1, wherein the light source bulb is centered by the outer peripheral surface of the collar portion contacting the two centering convex portions.