JPH0738888Y2 - Lens mounting structure for projector headlights - Google Patents

Description

[Detailed description of the device]

[Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector headlight, and more particularly to a mounting structure for a convex lens that is a projection lens thereof.

[Prior art]

FIG. 5 shows an example of a conventional mounting structure for a lens 11 of this type. The lens 11 is fixed by sandwiching a flange 12 provided on the periphery thereof with a lens frame 21 and a mounting ring 91. As a mounting procedure at this time, the lens 11 is first placed on the lens frame 21 on one surface of the flange 12, and then the mounting ring is mounted on the other surface of the flange 12. By attaching the ring portion 92 of 91 and screwing the leg portion 93 to, for example, the base portion 22 provided in the same body as the lens frame 21, the ring portion 92 is pressed against the flange 12 to be clamped and fixed. It is supposed to be done.

[Problems to be solved by the device]

However, since the lens 11 is formed by means such as embossing using glass, there are many variations in dimensional accuracy, and in particular, the flange 12 is the polished surface of the lens. Variations concentrate on the thickness t. This means that when the flange 12 is thicker than the standard, excessive stress is applied by the mounting of the mounting ring 91 and the flange 12 is damaged, and when the flange 12 is thinner than the standard, the clamping is insufficient and the lens 11 This results in backlash and defective products in any case, and for this reason, there arises a problem that the production yield of projector headlamps is significantly reduced, and a solution to this problem is a problem. It was

[Means for Solving the Problems]

As a concrete means for solving the above-mentioned conventional problems, the present invention places one surface of a flange provided on a peripheral edge of a lens on a lens frame, and the lens frame and the other surface of the flange. In a lens mounting structure for a projector headlamp, which is sandwiched and held by a mounting ring made up of a ring portion abutting against and a mounting leg provided in a direction in which the ring portion is pressed against the flange, By providing a lens mounting structure for a projector headlight, wherein the mounting leg is provided with a cushioning part that expands and contracts the ring part in the thickness direction of the flange, the conventional problems can be solved. is there.

【Example】

Next, the present invention will be described in detail based on an embodiment shown in the drawings. For the sake of easy understanding, the same parts as those of the conventional example will be described with the same reference numerals, and the overlapping parts will be partially omitted. Reference numeral 11 in FIG. 1 denotes a lens.
A flange 12 is provided on the peripheral edge of the flange 11, one side of the flange 12 is placed on the lens frame 21, and the other side of the flange 12 is sandwiched and fixed by the mounting ring 1. The mounting ring 1 is screwed to the ring portion 2 that comes into contact with the other surface of the flange 12 and the base portion 22 to generate stress in the direction in which the flange 12 is clamped to the ring portion 2. It is the same as the conventional example in that it is made up of a mounting leg 3 to be mounted, but according to the present invention, the mounting leg 3 is provided with a buffer portion 4. FIG. 2 shows the cushioning portion 4 in more detail. The cushioning portion 4 partially covers the mounting leg 3, for example, U.
By curving in a letter shape, appropriate elasticity and elasticity are given in the height direction of the mounting leg 3, that is, in the thickness t direction of the flange 12. FIGS. 3 and 4 show another embodiment of the present invention, in which the mounting leg 3 is screwed onto the base portion 22 when the buffer portion 4 is merely curved in a U shape. At the time of wearing, a screw for attachment comes into contact with and interferes with the buffer portion 4,
The mounting ring 1 and the base portion 22 are increased in size. Therefore, in this embodiment, the slit 4a is provided in the buffer portion 4 as a relief of the head of the above-mentioned mounting screw, and by doing so, it is possible to implement with a shape similar to the conventional example. Becomes Next, the operation and effect of the present invention configured as described above will be described. By providing the cushioning portion 4 on the mounting leg 3 of the mounting ring 1, variations in the thickness t direction of the flange 12 of the lens 11 are caused. The cushioning portion 4 absorbs the deformation, and the elasticity of the cushioning portion 4 applies an appropriate pressure contact force to the flange 12, so that the lens 1 can be reliably fixed regardless of the variation of the flange 12. Become. Needless to say, in actual implementation, the amount of variation of the flange 12 is preliminarily tested, and the cushioning portion is provided so as to provide elasticity and elasticity that can cope with the amount of variation. The shape of No. 4 is set, and is not limited to the U-shape described above as long as this condition is satisfied.

[Effect of device]

As described above, according to the present invention, the mounting leg of the mounting ring is provided with the buffer portion that expands and contracts the ring portion in the thickness direction of the flange. Absorbing variations that occur in the thickness direction by means of the buffer section, and improving yield with no damage to the flange or rattling of the mounting, and thus an extremely excellent effect in improving the productivity of this type of projector headlamp. Is played.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a lens mounting structure for a projector headlight according to the present invention, FIG. 2 is a perspective view of an essential part of the same embodiment, and FIG. 3 is another embodiment of the present invention. A sectional view showing an example, FIG. 4 is a plan view of an essential part of another embodiment, and FIG. 5 is a sectional view showing a conventional example. 1 …… Mounting ring 2 …… Ring part 3 …… Mounting leg 4 …… Cushioning part 4a …… Slit 11 …… Lens, 12 …… Flange 21 …… Lens frame, 22 …… Base part t …… Flange Thickness

Claims (2)

[Scope of utility model registration request] Claim: What is claimed is: 1. One surface of a flange provided on the periphery of a lens is placed on a lens frame, and a ring portion abutting the lens frame and the other surface of the flange and the ring portion are provided on the flange. In a lens mounting structure for a projector headlamp, which is sandwiched and held by a mounting ring composed of a mounting leg provided in a pressure contacting direction, the ring portion is attached to the mounting leg of the mounting ring in the thickness direction of the flange. A lens mounting structure for a projector headlight, characterized in that a buffer portion for expanding and contracting is provided. 2. The utility model registration claim (1) according to claim 1, characterized in that the buffer portion is provided with a slit portion for escaping a head portion of a screw for mounting the mounting leg. Lens mounting structure for projector headlights.