JP2500077Y2 - Nail lock structure for vehicle lighting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a multi-color molded lens is nailed and fixed to a lamp housing. However, in the present invention, multicolor molding is meant to include two-color molding.

[0002]

2. Description of the Related Art FIG. 2 is a horizontal sectional view of a rear combination lamp shown as an example of an object to which this kind of structure is applied. A socket 2 is installed in a lamp housing 1, and a light source bulb 3 is installed. An outer lens 4 is mounted to cover the front opening of the lamp housing 1, and an inner lens 5 is arranged inside the outer lens 4.
In the figure, 6 is a vehicle body, and 7 is a mounting screw.

A groove 9 for sealing is provided along the edge of the front opening of the lamp housing 1, and a leg 8 protruding rearward from the periphery of the outer lens 4 is inserted into the groove 9 and bonded. An enlarged detail of the vicinity of the leg 8 and the groove 9 is shown in FIG. The leg 8 of the lens is inserted into the groove 9 for sealing,
Hot melt 1 which is a heat-softening adhesive in the seal groove 9
0 is filled.

However, when the outer lens 4 and the lamp housing 1 are made of synthetic resin, injection molding distortion occurs. Therefore, the combination as shown in FIG.
There is a possibility that the outer lens 4 may come off if it is just adhered. Then, nails 11 are driven from the outside of the seal groove 9 toward the leg 8 of the lens to be mechanically fixed.

If the portion of the lens leg 8 into which the nail 11 is driven is thin, the coupling force will be insufficient, so a boss having a thick wall is provided. FIG. 4 is a schematic partial cross-sectional view for explaining the above boss. In the lens of this example, a red lens 4a and an orange lens 4b are multicolored and integrally formed. Boss 4a _{1 on the} red lens 4a
And the boss 4b ₁ is provided on the orange lens 4b. The nails mentioned above are driven into these bosses. For this driving operation, ultrasonic driving technology is known.

[0006]

As in the prior art example (FIG. 4), in order to provide the boss on the lens, it is necessary to perform injection molding using a mold having a complicated shape, which results in a high manufacturing cost. .

An object of the present invention is to provide a nail lock structure which is capable of reliably locking a lens having no boss by nail driving, and which is low in manufacturing cost.

Thus, the present invention is applied to a multicolor molded lens in which the red lens 8a and the orange lens 8b shown in FIG. 4 are integrally molded.

[0009]

As a structure for achieving the above object, a nail lock structure according to the present invention comprises a lamp housing, a seal groove provided in a front opening of the lamp housing, and the lamp. A multi-color molded lens made of synthetic resin, which is disposed so as to cover the front opening of the housing, a lens leg which is provided in the lens and is inserted into a seal groove, and a lens leg which is filled in the seal groove and is bonded to the lens leg. In a vehicular lamp having a hot melt and a nail that penetrates the wall of the seal groove is driven into the lens,
It is characterized in that the nails are driven into the welded portions of the synthetic resins having different color tones that constitute the multicolor molded lens.

[0010]

In the present injection molding technology, the welded portion of the different-color lens in the multi-color molded lens is necessarily thick, and the different-color synthetic resin materials are fused and integrated. Therefore, if nails are driven into the welded portion, a reliable nail lock effect can be obtained without forming a separate boss.

[0011]

1 is a schematic partial sectional view corresponding to FIG. 4 in a conventional example showing an embodiment of the present invention. The difference from FIG. 4 is that the bosses 4a ₁ and 4a ₂ are not provided. The elimination of the boss naturally reduces the manufacturing cost of the lens.

Reference numeral 4c denotes a welded portion of the red lens 4a and the orange lens 4b, in which a red transparent synthetic resin material and an orange transparent synthetic resin material are fused and integrally solidified.
The nail 11 shown in FIG. 3 is driven into the thick portion t of the leg 8. As a constituent portion corresponding to this thick portion, FIG.
In the conventional example, the bosses 4a ₁ and 4b ₁ are provided, but in the present example (FIG. 1), the welded portion 4c is used as a thick portion for nail driving, and the nail (not shown in FIG. 1) is used here. Type in. This ensures that the lens is nail locked to the lamp housing.

[0013]

The lamp housing, the seal groove provided in the front opening of the lamp housing, the multi-color molded lens made of synthetic resin disposed so as to cover the front opening of the lamp housing, and the lens Has a lens leg inserted into the seal groove and a hot melt filling the seal groove to bond the lens leg, and a nail penetrating the wall of the seal groove is driven into the lens. By applying the present invention to a vehicular lamp and driving the nail into the welded portions of the synthetic resins having different tones forming the multicolor molded lens, the lens need not be provided with a boss. A reliable nail lock can be applied.

[Brief description of drawings]

FIG. 1 is a schematic partial sectional view showing an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a rear combination lamp shown as an example of an object to which the present invention is applied.

FIG. 3 is a cross-sectional view which is shown for general description of a nail lock structure and is common to both the conventional example and the example.

FIG. 4 is a schematic partial cross-sectional view showing a conventional nail lock structure.

[Explanation of symbols]

1 Lamp housing 2 Socket 3 Light source bulb 4 Outer lens 4a Red lens 4a ₁ Boss 4b Orange lens 4b ₁ Boss 4c Welding part 5 Inner lens 6 Car body 7 Mounting screw 8 Leg 9 Seal groove t Thick part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 59-130311 (JP, U) Rikai Flat 2-101408 (JP, U) Rikai 63-101406 (JP, U) Rikai Sho 61- 124901 (JP, U) Actually opened 54-170561 (JP, U) Actually opened 56-90303 (JP, U) Actually opened 58-164102 (JP, U) Actually opened 4-115705 (JP, U) Actual Public Hei 5-30245 (JP, Y2) Actual Public Sho 53-53426 (JP, Y2) Actual Public Sho 63-3043 (JP, Y2) Actual Public Sho 57-29448 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A lamp housing, a seal groove provided in a front opening of the lamp housing, a synthetic resin multicolor molded lens disposed so as to cover the front opening of the lamp housing, and the lens. Has a lens leg inserted into the seal groove and a hot melt filling the seal groove to bond the lens leg, and a nail penetrating the wall of the seal groove is driven into the lens. In a vehicular lamp, the nail lock structure for a vehicular lamp is characterized in that the nail is driven into a welded portion between synthetic resins having different color tones forming the multicolor molded lens. .