JP2563092Y2 - Light source bulb mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a light source bulb on a vehicle lamp.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional light source bulb mounting structure. A valve holder 2 is fixed to the reflector 1. The bulb holder 2 has a stepped portion 2a having a surface perpendicular to the center line Z. A flange 3c formed in a socket portion 3b of the light source bulb 3 is brought into contact with the stepped portion. When the flange 3c is pressed toward the stepped portion 2a by the holding spring 2b of the holder, the holding spring 2b is hooked on the hook 2c. 3a is a bulb of the light source bulb, and 4 is a cord (harness) connected to the socket part 3b of the light source bulb. 2e is a positioning engaging projection, and 3d is a notch.

[0003]

In the prior art shown in FIG. 4, the light source bulb 3 is moved in the direction of arrow Z in the bulb holder 2.
When the light source bulb 3 is inserted and mounted, the light source bulb 3 is difficult to work because the cord 4 is attached, and the cord 4 is dragged, so that the cord receives a force pulled back in the direction of the arrow Z by the cord. For this reason, some temporary fixing means is required to keep the flange 3c of the light source bulb 3 abutting on the stepped portion 2a of the bulb holder, and a high degree of skill is required to latch the presser spring 2b. It requires a great deal of labor. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a structure in which a light source bulb can be quickly and easily attached to a bulb holder without special skill.

[0004]

In order to achieve the above object, a light source bulb mounting structure according to the present invention is arranged such that a flange of a light source bulb is brought into contact with a stepped portion of a bulb holder, and a holding spring of the bulb holder is used. In the mounting structure of the light source bulb, which presses the flange toward the stepped portion,
A notch is provided on the periphery of the flange, and a C-shaped or Ω-shaped leaf spring that engages with the notch is attached to the bulb holder, and the light source bulb is mounted on the bulb holder. Are adapted to press and bend the leaf spring.

[0005]

According to the above means, the bent leaf spring exerts a reaction force on the bottom of the notch by the elastic restoring force. For this reason, the notched flange is pressed by the leaf spring and positioned without play, and the flange between the leaf spring and the bottom of the notch acts as a temporary fixing to the bulb holder due to the friction between the leaf spring and the bottom of the notch. Receive strength. Therefore, the retaining spring can be easily latched.

[0006]

FIG. 3 is a longitudinal sectional view of a vehicular lamp provided with an embodiment of the present invention. This example is for a projector-type headlight.
The present invention is applied to a structure in which a discharge lamp is mounted as a light source bulb, wherein 6 is a condenser lens of a projector type headlamp, and 7 is a shade. Light source bulb 3 '
The lamp bulb 3a of the discharge lamp is fixed to the socket portion 3b, and a flange 3c is formed in the socket portion 3b. Reference numeral 3d denotes a notch provided on the periphery of the flange 3c, and a positioning spring 5d formed of a C-shaped or Ω-shaped leaf spring mounted on the valve holder 5 is engaged with the notch 3d. FIG. 2A is an enlarged view of a main part depicting the vicinity of the light source bulb 3 'and the bulb holder 5'. FIG.
(B) is a rear view of the same part. FIG. 1 is an exploded perspective view of the portion shown in FIG. However, in FIG. 1, the presser spring 5b is removed. 5e
Is a fulcrum for attaching the holding spring so as to be tiltable. A positioning spring 5d is mounted on the valve holder 5. FIG. 2 shows the positioning spring 5d of this embodiment.
(A) has a Ω shape as drawn by a solid line,
The valve holder 5 is mounted so as to sandwich it.
5d 'drawn by an imaginary line indicates a free state in which no external force is applied, and 5d drawn by a solid line indicates a state in which the notch 3d is engaged and bent. Although not shown, the same operation and effect can be obtained even if the positioning spring 5d is formed in a C-shape. In the state shown in FIG. 1, the positioning spring 5d is in a free state, and when the light source bulb 3 'is inserted in the arrow Z direction, it engages with the notch 3d of the flange 3c to rotate about the Z axis. It is locked and its angular position is determined. The positioning spring 5d has a notch 3d.
Is pressed and deflected by the bottom of the spring, giving a reaction force by an elastic restoring force, and preventing the escape in the direction of the arrow Z by a frictional force to perform a temporary fixing function. Thus, as shown in FIG. Can be latched quickly and easily. Reference numeral 5f shown in FIG. 1 denotes a light source bulb positioning projection provided on the bulb holder 5 '. The projection 5f and the positioning spring 5d serve as three projections around the flange 3c of the light source bulb 3'. And positioning is performed while preventing movement in a plane perpendicular to the Z axis.

[0007]

As described above, according to the light source bulb mounting structure of the present invention, the light source bulb can be quickly, easily, and correctly mounted on the bulb holder without any special skill. be able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of one embodiment of the present invention.

FIG. 2 is a two-sided view showing a main part of the embodiment.

FIG. 3 is an overall vertical sectional view of the embodiment.

FIG. 4 is an exploded view showing a conventional example relating to a light source bulb mounting structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reflector, 2 ... Valve holder, 2a ... Stepped part, 2
b ... Holding spring, 2c ... Hook, 3,3 '... Light source bulb, 3a ... Tube, 3b ... Socket, 3c ... Flange, 3d ... Notch, 4 ... Cord, 5 ... Bulb holder, 5a
... Stepped part, 5d. Positioning spring, 5e.

Claims (1)

(57) [Scope of request for utility model registration] 1. A light source bulb mounting structure in which a flange of a light source bulb is brought into contact with a stepped portion of a bulb holder, and the flange is pressed toward the stepped portion by a holding spring of the bulb holder. And a C-shaped or Ω engaging with the notch
A plate-shaped leaf spring is attached to the bulb holder, and in a state where the light source bulb is mounted on the bulb holder, the bottom of the notch presses and flexes the leaf spring. Light source bulb mounting structure.