JP2000036212A - Head lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts for fixation of a light source bulb and a shade to a reflector and man hours for assembly. SOLUTION: A bulb fixing piece 22c for fixing a light source bulb 20 to an opening 18b for inserting a bulb of a reflector 18 is integrally formed with a shade 22 on a back end of an installation stay 22b of a shade 22. A ring lock portion 18d for locking a mouth ring 20a of the light source bulb 20 is formed on the opening 18b for inserting a bulb in order to simplify a structure of the bulb fixing piece 22c. Fixation of the shade 22 to the reflector 18 is ensured by pressing a U shaped folded portion 22e in an annular wall 18e of the opening 18b for inserting a bulb from behind. A detachment preventive claw formed in the U shaped folded portion 22e prevents the shade 22 from detaching. According to the above structure, no new parts is required for fixing the light source bulb 20 and the shade 22, and parts cost and man hours for assembly can be greatly reduced in comparison with the conventional structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headlight provided with a shade.

[0002]

2. Description of the Related Art In a vehicle headlamp, generally, FIG.
As shown in FIG. 5, the light source bulb 102 is
The light source bulb 10 is inserted into the light source bulb 10.
2 is fixed to the reflector 104 by using a valve fixture such as a wire spring 108 as shown in FIG.

[0003] As shown in FIG. 1, a shade for covering the periphery of the light source bulb 102 is provided in the vehicle headlight in order to prevent direct light from the light source bulb 102 from being emitted in unnecessary directions. The shade 10 is provided.
6 is fixed to the reflector 104 by screwing or the like.

[0004]

In the above-described conventional vehicle headlamp, the light source bulb 1 is provided with respect to the reflector 104.
02 and the shade 106 need to be fixed, so that the following problem arises.

[0005] That is, since a bulb fixture for fixing the light source bulb 102 and a shade fixture for fixing the shade 106 are required, there is a problem that the number of parts of the lamp increases. For example, in a vehicle headlamp shown in FIG.
08, screws 110 and washers 112, and screws 114 as shade fixtures. Further, there is a problem that many assembling steps are required to fix the light source bulb 102 and the shade 106.

The present invention has been made in view of such circumstances, and in a vehicle headlamp provided with a shade, the number of parts involved in fixing the light source bulb and the shade to the reflector can be reduced. It is another object of the present invention to provide a vehicular headlamp capable of reducing the number of assembling steps.

[0007]

According to the present invention, the above object is achieved by integrally forming a valve fixing portion on a shade.

That is, according to the present invention, a reflector, a light source bulb inserted into the reflector, and a shade fixed to the reflector so as to cover the periphery of the light source bulb are provided. And a bulb fixing portion for fixing the light source bulb to the reflector is formed integrally with the shade.

The above-mentioned "shade" may be constituted by a single member or may be constituted by joining a plurality of members.

[0010] The "bulb fixing portion" is not particularly limited in its specific configuration (for example, shape, forming position, forming number, etc.) as long as it can fix the light source bulb to the reflector.

[0011]

As described above, in the vehicle headlamp according to the present invention, since the bulb fixing portion is formed integrally with the shade, it is possible to eliminate the need for a valve fixing tool as in the prior art. The light source bulb can be fixed to the reflector.

Therefore, according to the present invention, in a vehicle headlamp provided with a shade, the number of parts involved in fixing the light source bulb and the shade can be reduced, and the number of assembling steps can be reduced. .

In the above configuration, the bulb fixing portion may be configured to be elastically deformed by the pressing force received from the base ring of the light source bulb to engage with the base ring. For example, the light source bulb can be securely fixed to the reflector by a simple configuration and a simple assembling operation.

In the above structure, the light source bulb may be fixed to the reflector only by the bulb fixing portion of the shade.
As described in the above, if a ring locking portion for locking the base ring of the light source bulb is formed in the valve insertion opening of the reflector, the configuration of the bulb fixing portion can be further simplified.

In the above configuration, the specific configuration of the shade to be fixed to the reflector is not particularly limited, and the shade may be fixed to an arbitrary portion of the reflector by various fixing methods such as screwing and caulking. However, as described in claim 4, the shade is fixed by pressing the shade into the reflector, and when the shade is pressed into the reflector, the shade bites into the reflector and the shade is separated from the reflector. By forming the separation preventing claw for preventing the shading, the shade can be securely fixed to the reflector by an extremely simple configuration and a simple assembling operation. In this case, the direction in which the shade is pressed into the reflector is not particularly limited.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described.

FIG. 1 is a side sectional view showing a vehicle headlamp according to this embodiment.

As shown in the figure, a vehicle headlamp 10 according to the present embodiment has a reflector unit 16 provided in a lamp room formed by a lens 12 and a lamp body 14 such that the reflector unit 16 can tilt up, down, left and right. ing.

The reflector unit 16 includes the reflector 1
8, a light source bulb 20, and a shade 22.

The reflector 18 has a reflecting surface 18a in which a plurality of reflecting elements are formed on a paraboloid of revolution having the optical axis Ax as a central axis, and the light from the light source bulb 20 is reflected by the reflecting surface 18a. Is reflected forward.
A valve insertion opening 18b is formed at the rear top of the reflector 18.

The light source bulb 20 is an H4 type halogen bulb, and is inserted into the bulb insertion opening 18b from the rear side.

The shade 22 includes a light-shielding cap 22a that covers the periphery of the tip of the light source bulb 20 and cuts off direct light that is harmful to light distribution, and a mounting stay 22b that fixes the light-shielding cap 22a to the reflector 18. Further, a light source bulb 2 is provided at the rear end of the mounting stay 22b.
A valve fixing piece 22 c (valve fixing portion) for fixing the reflector 0 to the reflector 18 in a state in which 0 is inserted into the valve insertion opening 18 b is formed integrally with the shade 22.

Next, the light source bulb 20 and the shade 22
The structure for fixing the reflector 18 to the reflector 18 will be described in detail.

FIG. 2 is a detailed view of a part II in FIG.
FIG. 4 is a detailed view of a part III in FIG. 2, FIG. 4 is a view in the direction of arrow IV in FIG. 2, and FIG. FIG. 6 is a perspective view showing the shade 22 as a single item.

As shown in FIGS. 2 and 4, the reflector 1
8, three positioning pieces 20 formed on the base ring 20a of the light source bulb 20 are provided in the bulb insertion opening 18b.
b, 20c, and 20c, a valve contact surface 18c is formed. The valve contact surface 18c has at its upper end a positioning piece 20 located at the upper end of the base ring 20a.
A ring locking portion 18d for locking b is formed.

This ring locking portion 18d is
The opening is provided in the up-down direction with substantially the same front-rear width and left-right width as that of Ob. The inner part of the ring engaging part 18d is opened to the front side of the reflector 18, so that the ring engaging part 18d can be formed without requiring a slide type.

In FIG. 2, when the positioning piece 20b at the upper end of the light source bulb 20 is locked to the ring locking portion 18d, the light source bulb 20 is inclined slightly downward as shown by a two-dot chain line. 20 is pushed forward, the positioning piece 20b is inserted into the ring engaging portion 18d as shown by the solid line, and the lower end edge of the base ring 20a is attached to the valve fixing piece 22c of the shade 22.
Is engaged with a step 22d formed at the tip of the.

That is, as shown in FIG. 3, the bulb fixing piece 22c is formed in a curved surface curved upward, and when the light source bulb 20 is pushed forward, the base ring 20a causes the bulb fixing piece 22c to move. It is pressed downward and moves forward while being elastically deformed as shown by the two-dot chain line in the figure. When it comes into contact with the valve contact surface 18c, it just climbs over the valve fixing piece 22c, and the step at the tip end thereof It is designed to engage with the portion 22d. Thus, the light source bulb 20 is fixed in a state of being inserted into the bulb insertion opening 18b.

When the bulb is replaced, the light source bulb 20 is pulled backward while pressing the bulb fixing piece 22c downward with a finger, whereby the engagement with the bulb fixing piece 22c can be easily released. .

As shown in FIG. 6, the mounting stay 22b of the shade 22 has a rear end portion which is wide in an arc shape to the left and right and is bent and formed in a U-shape. The U-shaped bent portion 22e is pressed into the lower end of the annular wall 18e of the valve insertion opening 18b from the rear to fix the shade 22 to the reflector 18. The valve fixing piece 22c is provided in the U-shaped bent portion 2.
It is formed by cutting and raising the left and right central portions of 2e. Valve fixing piece 22c in this U-shaped bent portion 22e
A pair of separation preventing claws 22f cut and raised in a wedge shape toward the annular wall 18e is formed on both left and right sides of the pair. Each of these separation preventing claws 22f is formed to face rearward.
As a result, as shown in FIG.
e is press-fitted into the annular wall 18e.
The f cuts into the inner peripheral surface of the annular wall 18e to prevent the shade 22 from separating from the reflector 18.

The light-shielding cap 22a of the shade 22
Is larger than the inner diameter of the valve insertion opening 18b,
When fixing the shade 22 to the reflector 18, the mounting stay 22b is inserted from the front into the valve insertion opening 18b, and the U-shaped bent portion 22e is temporarily located behind the valve insertion opening 18b. After that, shade 22
Is moved forward so that the U-shaped bent portion 22e is
e.

As shown in FIG. 4, the valve insertion opening 1
The lower end of the valve contact surface 18c of 8b is cut out to allow the shade 22 to pass therethrough. The notch width is set to substantially the same size as the left and right widths of the inner peripheral wall of the U-shaped bent portion 22e, whereby positioning in the circumferential direction when fixing the shade 22 to the reflector 18 is performed. ing.

As shown in FIG. 6, the right and left side edges of the inner peripheral wall of the U-shaped bent portion 22e are tapered forward, so that the U-shaped bent portion 22e is formed on the annular wall 18e. It serves as a guide function for press-fitting.

As described in detail above, the vehicular headlamp 10 according to the present embodiment has the shade 22 with the bulb fixing piece 22c.
Are integrally formed, so that the light source bulb 20 can be connected to the reflector 18 without the need for a bulb fixture as in the prior art.
Can be fixed.

Further, since the bulb fixing piece 22c is configured to be elastically deformed by the pressing force received from the ferrule ring 20a of the light source bulb 20 and to engage with the ferrule ring 20a, it has a simple configuration and is simple. The light source bulb 20 can be securely fixed to the reflector 18 by a proper assembling operation.

Further, a ring engaging portion 18d for engaging the base ring 20a of the light source bulb 20 is formed in the bulb insertion opening 18b of the reflector 18, so that the valve fixing piece 22c and the base ring 20a are connected to each other. The engagement only needs to be performed at one place, and the valve fixing structure to be formed on the shade 22 can be further simplified.

Further, regarding the fixing of the shade 22 to the reflector 18, the U-shaped bent portion 22e formed at the rear end of the mounting stay 22b is attached to the lower end of the annular wall 18e of the valve insertion opening 18b. The U-shaped bent portion 22e is formed with a pair of left and right separation preventing claws 22f, and the inner peripheral surface of the annular wall 18e when the press-fitting is performed. As a result, the shade 22 is prevented from coming off from the reflector 18 so that the shade 22 can be securely fixed to the reflector 18 by an extremely simple configuration and a simple assembling operation.

As described above, according to the present embodiment, there is no need for a new component relating to the fixing of the light source bulb 20 and the shade 22, thereby significantly reducing the component cost and the number of assembling steps as compared with the related art. Can be.

Next, a second embodiment of the present invention will be described.

FIG. 7 is a side sectional view showing a main part of the vehicular headlamp according to this embodiment. FIG. 8 is a view taken in the direction of the arrow VIII in FIG. 7, and FIG. FIG. 19 is a sectional view taken along line -IX. FIG. 10 is a perspective view showing the shade 22 used in the present embodiment as a single item.

The vehicle headlamp according to the present embodiment is similar to the first embodiment in the basic structure of the lamp,
The light source bulb 20 is an H1 type halogen bulb,
The reflector 1 of the light source bulb 20 and the shade 22
8 is different from that of the first embodiment.

In this embodiment, the fixing of the light source bulb 20 to the reflector 18 is performed as follows.

That is, as shown in FIG. 7, the light source bulb 20 is inserted into the bulb insertion opening 18b of the reflector 18 from behind, and the base ring 20a is brought into contact with the bulb contact surface 18c of the bulb insertion opening 18b. In contact with
The valve fixing piece 22c integrally formed at the rear end of the mounting stay 22b of the shade 22 is bent upward while elastically deforming it, and the locking piece 22g formed at the front end of the valve fixing piece 22c is inserted into the valve insertion opening. The light source bulb 20 is fixed to the reflector 18 by elastically pressing the base ring 20a with the bulb fixing piece 22c by engaging with the shade engaging portion 18f formed in the vicinity of above the 18b.

On the other hand, the fixing of the shade 22 to the reflector 18 is performed as follows.

That is, as shown by a two-dot chain line in FIG.
The valve fixing piece 22c of the shade 22 is inserted from the front into a shade insertion hole 18g formed near and below the valve insertion opening 18b of the reflector 18, and as shown in FIG. A pair of left and right lances 22h formed integrally are press-fitted from the front into a pair of left and right lance engagement grooves 18h formed near the lower part of the shade insertion hole 18g, thereby shading the reflector 22 into the reflector 1.
8 fixed. Each lance 22h
In order to effectively prevent the shade 22 from detaching from the reflector 18, the upper and lower end edges thereof are formed in a sawtooth shape.

As shown in FIG. 10, a long hole 22i for preventing interference with the light source bulb 20 is formed in the bulb fixing piece 22c of the shade 22. The peripheral portion of the elongated hole 22i is formed in a corrugated shape in order to ensure contact with the valve contact surface 18c.

Also in the present embodiment, since the bulb fixing piece 22c is formed integrally with the shade 22, the light source bulb 20 does not need a bulb fixing tool as in the prior art.
Can be fixed to the reflector 18.

Further, since the shade 22 is fixed to the reflector 18 by the lance, the shade 22 can be securely fixed to the reflector 18 by an extremely simple configuration and a simple assembling operation.

As described above, in the present embodiment as well, no new components for fixing the light source bulb 20 and the shade 22 are required at all, thereby greatly reducing component costs and assembly man-hours as compared with the related art. it can.

Next, a third embodiment of the present invention will be described.

FIG. 11 is a side sectional view showing a main part of the vehicle headlamp according to the present embodiment, FIG. 12 is a view taken in the direction of the arrow XII in FIG. 11, and FIG. FIG. 3 is a sectional view taken along line -XIII. FIG. 14 is a perspective view showing the shade 22 used in the present embodiment as a single item.

The headlamp for a vehicle according to the present embodiment has substantially the same basic structure of the lamp and the structure for fixing the light source bulb 20 to the reflector 18 as the second embodiment.
The fixing structure of the second to the reflector 18 is different from that of the second embodiment.

That is, the reflector 1 of the light source bulb 20
As shown in FIG. 11, when the base ring 20a is in contact with the valve contact surface 18c, the valve fixing piece 22c formed integrally with the rear end of the mounting stay 22b is elastically fixed to the valve mounting piece 22 as shown in FIG. This is performed by bending upward while deforming and locking the locking pieces 22g to the shade locking portions 18f.

On the other hand, the shade 22 is fixed to the reflector 18 as follows.

That is, as shown by a two-dot chain line in FIG.
8 is inserted from the front to a predetermined position into a shade insertion hole 18g formed near the lower part of the valve insertion opening 18b,
As shown in FIG. 13, a mounting stay 22b for the shade 22 is provided.
The shade fixing piece 22j which is integrally formed so as to be bent downward at a right angle from the rear end portion thereof is inserted into the shade insertion hole 18.
g is press-fitted from above into a shade locking groove 18i formed near the bottom of the reflector g.
8 fixed.

The shade locking groove 18i is
Offset part 18 that offsets part of the rearward
By j, it is formed in a slide type unnecessary shape. The shade fixing piece 22j is formed with a substantially rectangular detachment preventing claw 22k that is cut and raised upward toward the rear side, and when pressed into the shade locking groove 18i, the detachment preventing claw 22k is formed. Are engaged with the lower surface of the offset portion 18j to prevent the shade 22 from being detached from the reflector 18.

Also in this embodiment, since the bulb fixing piece 22c is formed integrally with the shade 22, the light source bulb 20 does not require a bulb fixing tool as in the prior art.
Can be fixed to the reflector 18.

Further, since the shade 22 is fixed to the reflector 18 by press-fitting, the shade 22 can be securely fixed to the reflector 18 by an extremely simple structure and a simple assembling operation.

As described above, in the present embodiment as well, no new components for fixing the light source bulb 20 and the shade 22 are required at all, thereby greatly reducing component costs and assembly man-hours as compared with the related art. it can.

In each of the above embodiments, the so-called reflector movable type vehicle headlight in which the reflector unit is provided in the lamp room so as to be tiltable has been described. However, the reflector unit and the lens form the lamp room to be integrated. Also in a so-called unit movable type vehicle headlamp that tilts in a vertical direction, by adopting the same configuration as in each of the above-described embodiments, it is possible to obtain the same operation and effects as those of the above-described embodiments.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a vehicle headlamp according to a first embodiment of the present invention.

FIG. 2 is a detailed view of part II of FIG.

FIG. 3 is a detailed view of a part III in FIG. 2;

FIG. 4 is a view taken in the direction of arrow IV in FIG. 2;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a perspective view showing the shade of the first embodiment as a single item.

FIG. 7 is a view similar to FIG. 2, showing a main part of a vehicle headlamp according to a second embodiment of the present invention;

FIG. 8 is a view taken in the direction of arrow VIII in FIG. 7;

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a perspective view showing the shade of the second embodiment as a single item.

FIG. 11 is a view similar to FIG. 2, showing a main part of a vehicle headlamp according to a third embodiment of the present invention;

FIG. 12 is a view taken in the direction of the arrow XII in FIG. 11;

13 is a sectional view taken along line XIII-XIII of FIG.

FIG. 14 is a perspective view showing the shade of the third embodiment as a single item.

FIG. 15 is a view similar to FIG. 2, showing a conventional example.

[Explanation of symbols]

 Reference Signs List 10 vehicle headlight 12 lens 14 lamp body 16 reflector unit 18 reflector 18a reflecting surface 18b valve insertion opening 18c valve abutment surface 18d ring locking portion 18e annular wall 18f shade locking portion 18g shade insertion hole 18h lance engagement Mating groove 18i Shade engaging groove 18j Offset part 20 Light source bulb 20a Base ring 20b, 20c, 20c Positioning piece 22 Shade 22a Light shielding cap 22b Mounting stay 22c Valve fixing piece (valve fixing part) 22d Step 22e U-shaped bent part 22f Separation preventing claw 22g Locking piece 22h Lance 22i Long hole 22j Shade fixing piece 22k, 22m Separation preventing claw Ax Optical axis

Claims (4)

[Claims] 1. A vehicle headlamp comprising: a reflector; a light source bulb inserted into the reflector; and a shade fixed to the reflector so as to cover the periphery of the light source bulb. A vehicular headlamp, wherein a bulb fixing portion for fixing the light source bulb to the reflector is formed integrally with the shade. 2. The light source bulb according to claim 1, wherein said bulb fixing portion is elastically deformed by a pressing force received from said base ring of said light source bulb to engage with said base ring. Headlights for vehicles. 3. The front for a vehicle according to claim 1, wherein a ring locking portion for locking a base ring of the light source bulb is formed in an opening for valve insertion of the reflector. Illumination. 4. The fixing of the shade to the reflector is performed by press-fitting the shade into the reflector, and when the press-fitting is performed on the shade, the shade bites into the reflector and the shade is removed from the reflector. The vehicle headlight according to any one of claims 1 to 3, wherein a separation prevention claw for preventing separation is formed.