JPH0650887Y2 - Vehicle lamp having an adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp having a structure in which an adapter is interposed between a lamp housing and a front lens. .

[Conventional technology]

A vehicular lamp generally has a structure in which a front lens is mounted to cover a front opening of a lamp housing, and a reflector and a light source bulb are installed therein.

However, there is a case where a cylindrical adapter is interposed between the periphery of the front opening of the lamp housing and the periphery of the front lens.

These adapters are installed for a. If the lamp housing has a deep box shape and it is difficult to perform die-cutting when injection molding this with a synthetic resin material, or b. This is the case where the side wall is overheated and only the side wall is made of a synthetic resin material having excellent heat resistance.

A groove that opens toward the front of the lamp is generally provided around the front opening of the lamp housing, while legs that project toward the rear of the lamp are provided around the lens.

If the adapter is not provided, the lens leg is inserted into the groove of the lamp housing for assembly.

When an adapter is provided, a groove is provided on the front side of the lamp and a leg is provided on the rear side of the lamp of the adapter. Then, the legs of the lens are inserted into the grooves of the adapter, and the legs of the adapter are inserted into the grooves of the lamp housing to be assembled.

If an adapter is provided for the purpose of improving heat resistance,
The adapter is generally made of a synthetic resin material having higher heat resistance than the lamp housing, and ribs for preventing thermal distortion are arranged in a row.

[Problems to be solved by the device]

When the adapter is interposed between the lamp housing and the front lens, the front lens and the adapter are firmly joined by an adhesive (for example, hot melt).

In many cases, the adapter and the lamp housing are removably mounted in consideration of maintenance. In this case, a waterproofing measure is taken by interposing a packing between the groove of the lamp housing and the leg of the adapter.

However, since the positioning of the fitting between the legs of the adapter and the groove of the lamp housing is unstable, the pressure bonding of the packing is unstable, and the waterproof reliability is low.

Since the present invention has been made in view of the above circumstances, there is no risk of thermal distortion even if the temperature rises due to the heat generated by the light source bulb, the positioning of the adapter with respect to the lamp housing is reliable, and the waterproof property is simple An object of the present invention is to provide a vehicular lamp having a configuration and provided with an adapter.

[Means for Solving the Problems]

To achieve the above object, the present invention provides a vehicular lamp in which a cylindrical adapter is provided between the front opening of the lamp housing and the front lens, and a ring shape of the front opening of the lamp housing is provided. The annular groove has a shape in which the outer peripheral edge extends in a direction closer to the front lens than the inner peripheral edge, and the above groove is formed on the lamp housing side of the adapter. A leg to be inserted into the groove, a packing is interposed between the rear end of the leg and the bottom of the groove, and the outer peripheral surface of the leg of the adapter has the groove. It is characterized in that ribs that also function as reinforcement are arranged in a row so as to come into contact with the edge on the outer peripheral side, and that the above-mentioned ribs have a tapered surface that widens toward the front of the lamp.

[Action]

According to the above configuration, the rib provided on the leg of the adapter is provided with a taper, and the taper is widened toward the front of the lamp. Therefore, this taper surface is located on the outer peripheral side of the lamp housing. It fits in a wedge shape on the edge of the groove and is positioned without play.

In this way, since the adapter is reliably positioned with respect to the lamp housing, the packing interposed between the groove of the lamp housing and the legs of the adapter is reliably compressed and sandwiched, and excellent water resistance is obtained. .

The rib has a taper surface to perform the positioning function as described above and also has an original reinforcing function, so that the thermal strain is controlled even when the temperature is raised by the heat generated by the lamp.

〔Example〕

FIG. 1 shows a vehicular lamp 1 having an adapter according to the present invention.
It is a longitudinal section showing an example.

FIG. 2 is an external view of the above embodiment.

FIG. 3 is an enlarged detailed view of a portion surrounded by a chain line in FIG. 1, and FIG. 4 is a sectional view taken along the line IV-IV shown in FIG.

First, the overall configuration will be described with reference to FIGS. 1 and 2.

A tubular adapter 3 is interposed between the lamp housing 1 and the front lens 2.

A light source bulb 5 and a reflector 6 are provided in the lamp housing 1.
And are installed.

Reference numeral 7 denotes a rubber cover attached to cover the rear opening of the lamp housing 1, and is attached to the lamp housing 1 by a cap 8.

As shown in FIG. 3, a ring-shaped groove 1a is provided around the front opening of the lamp housing 1, and is located on the outer peripheral side (upper side in the figure) than the inner peripheral side (lower side in the figure) edge thereof. The edge extends toward the front lens 2. 1b is a reinforcing rib of the lamp housing.

A positioning reinforcing rib 3a is integrally formed on the outer peripheral side surface of the adapter 3.

The positioning reinforcing rib 3a has a ridge shape, and the top surface of the ridge is
3a _-1 has a tapered surface that expands toward the front of the lamp (left in FIG. 3). The tapered top surface 3a _-1 is pressed against the outer peripheral side (upper side in the figure) of the groove 1a in a wedge shape.

As shown in FIG. 4, a large number (20 in this example) of positioning reinforcing ribs 3a arranged in a row around the adapter 3 are in contact with the edges of the groove 1a of the lamp housing 1, whereby the lamp housing 1 is provided. The position of the adapter 3 with respect to 1 is regulated with high accuracy and stability.

A hot melt groove 3b is formed around the front of the lamp of the adapter 3 (on the left side in FIG. 3), and a leg 2a protruding rearward from the periphery of the front lens 2 is inserted into the groove 3a. It is glued.

The leg 3c of the adapter 3 is inserted into the groove 1a described above, and
The packing 4 is compressed between 3c.

In this example, the lamp housing 1 and the adapter 3 are
As shown in FIG. 2, they are fixed to each other by a clamp 10. In implementing the present invention, the lamp housing and the adapter are not necessarily clamps, but are fixed to each other so as to be detachable.

Since the adapter 3 is reliably positioned with respect to the lamp housing 1, the packing 4 interposed between the two is surely compressed and brought into close contact, and there is no risk of water leakage.

In addition, the positioning reinforcing rib 3a provided on the adapter 3
Also acts as a reinforcing rib and suppresses the occurrence of thermal strain.

[Effect of device]

As described above, when the present invention is applied to a vehicular lamp in which an adapter is interposed between the lamp housing and the front lens, the positioning of the adapter with respect to the lamp housing is reliable, so that the lamp housing is excellent in waterproofness. There is no risk of water invading from the joint. Moreover,
Since the adapter is provided with ribs, heat distortion is unlikely to occur and heat resistance is excellent.

[Brief description of drawings]

FIG. 1 shows a vehicular lamp 1 having an adapter according to the present invention.
It is a longitudinal section showing an example. FIG. 2 is an external view of the above embodiment. FIG. 3 is an enlarged detailed view of a portion surrounded by a chain line in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 1 ... Lamp housing, 1a ... Groove, 1b ... Reinforcing rib,
2 ... Front lens, 2a ... Leg, 3 ... Adapter, 3a ...
Positioning reinforcement ribs, 3a _-1 ... Tapered top surface, 3b ......
Hot melt groove, 3c …… Adapter leg, 4 …… Packing.

Claims (1)

[Scope of utility model registration request] 1. A vehicular lamp in which a tubular adapter is interposed between the periphery of the front opening of the lamp housing and the periphery of the front lens, wherein a ring-shaped groove is provided around the front opening of the lamp housing. The ring-shaped groove has a shape in which an edge on the outer peripheral side extends in a direction closer to the front lens than an edge on the inner peripheral side, and a leg to be inserted into the groove is formed on the lamp housing side of the adapter. A packing is provided between the rear end of the leg and the bottom of the groove, and the outer peripheral surface of the leg of the adapter contacts an edge on the outer peripheral side of the groove. A vehicular lamp having an adapter, wherein ribs which also come into contact with each other and also serve as reinforcement are provided in a row, and the rib has a tapered surface which widens toward the front of the lamp.