JPH04112404U - Vehicle lights - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the joint between the lamp housing and lens in a vehicle lamp so that it does not bulge out to the outer or inner circumference, making the entire lamp smaller, lighter, and cheaper. . [Configuration] Contact surface B between lens 4 and lamp housing 5
A ring groove is provided on the outer periphery of the ring groove, and the band 6 is formed to fill the ring groove. The band 6 is injection molded from a synthetic resin material that is compatible with the synthetic resin lens 4 and also compatible with the lamp housing 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a synthetic resin lamp that covers the front opening of a synthetic resin lamp housing. This invention relates to a vehicle lamp having a structure in which the lens is fixed.

0002

[Conventional technology]

Figure 4 depicts the lamp housing 1 and lens 2 in this type of vehicle lamp. FIG.

0003 Both the lamp housing 1 and the lens 2 are injection molded from synthetic resin material. . The synthetic resin that forms the lamp housing must be heat resistant, and the Since the synthetic resin used in the construction must be transparent, these materials are made of different types. They are constructed separately using synthetic resin materials and then joined together.

0004 In the lamp housing of this example, legs 2a are provided around the lens 2. A seal groove 1a is provided around the lamp housing 1.

[0005] Injecting hot melt 3, which is a heat-softening adhesive, into the seal groove 1a, The legs 2a are inserted and bonded.

[0006]

[Problem that the idea aims to solve]

In the conventional structure shown in FIG. 4, a seal is placed around the opening of the lamp housing 1. Because the groove 1a is provided, the vicinity of the seal groove bulges toward the outer circumference, which worsens the appearance. At the same time, the shape and weight of the lanterns increased. In addition, the area around the seal groove 1a bulges toward the inside of the lamp chamber A, so it is difficult to block light. There are also some problems. Moreover, the sealing performance of Hot Melt 3 is unlikely to be perfect.

[0007] In order to improve the above problems, welding is used instead of hot melt bonding. Although the applied technology is also known, the above-mentioned problem has not yet been solved.

[0008] This idea was created in view of the above circumstances. a. Can be configured to be small and lightweight, b. Since it does not bulge outward, there is no risk of damaging the appearance. c. Since it does not bulge inward, there is no risk of blocking the optical path. d. Excellent sealing performance, The purpose is to provide lighting equipment for vehicles.

[0009]

[Means to solve the problem]

In order to achieve the above object, the vehicle lamp according to the present invention has the following features: A synthetic resin lens is fixed over the front opening of the synthetic resin lamp housing. In vehicle lights that are A groove that is located at the contact area between the lamp housing and the lens and runs around the outer circumference of the lamp housing. is provided, In the groove above, the synthetic resin forming the lamp housing and the lens A synthetic resin material is injected that is compatible with both of the synthetic resins forming the It is characterized by forming a band.

0010

[Effect]

According to the above configuration, the band can be attached to both the lens and the lamp housing. Because they are compatible, they are integrated and bonded, and the bonding strength is large and the sealing performance is perfect. be. Moreover, there is no need to provide a seal groove, so the lamp housing and lens are in contact with each other. The area does not bulge outward or inward. It does not bulge outward, so the appearance is not damaged, and it does not bulge inward, so it does not block the optical path. . In addition, there is no need to provide a seal groove or lens leg, making the entire lamp smaller and lighter. structure, and manufacturing costs are also reduced.

[0011]

【Example】

FIG. 1 shows a lens 4 and a lamp housing 5 of a vehicle lamp according to the present invention. It is a drawn cross-sectional view. B in the figure is a contact surface between the lens 4 and the lamp housing 5. The lens 4 has a spigot-type stepped portion 4a formed by cutting out the contact surface B. On the other hand, a similar stepped portion 5a is also formed on the lamp housing 5. Both stepped portions 4a and 5a face each other to form a ring groove-shaped recess. A band 6 is injection molded to fill the recess.

0012 FIG. 2(A) is an exploded sectional view of the lens 4 and lamp housing 5. A spigot-shaped stepped part 4a is formed around the lens 4, and the lamp housing 5 A spigot-shaped stepped portion 5a is also formed around the periphery. When the lens 4 and lamp housing 5 are brought into contact as shown in FIG. 2(B), the front A ring groove 7 is formed by facing the stepped portions 4a and 5a.

[0013] With the lens 4 and lamp housing 5 in contact as shown in Figure 2(B), These members are sandwiched between a mold (A) 8 and a mold (B) 9. Said groove 7 forms a cavity. Inject synthetic resin material into this cavity The band 6 shown in FIG. 1 is formed by molding.

[0014] In this example, the lens 4 is made of acrylic resin. and lamp housing 5 was made of polycarbonate. Band 6 is compatible with both acrylic resin and polycarbonate. It is constructed with ABS that This allows the band 6 to be aligned with both the lens 4 and the lamp housing 5. Physically welded together to firmly and watertightly connect both parts.

[0015] Moreover, since the band 6 tends to shrink after injection molding, the above bond becomes even stronger. It becomes hard.

[0016] As can be easily understood by comparing FIG. 1 (this embodiment) and FIG. 4 (conventional example), In the example, the seal groove 1a is not provided, so there is no expansion toward the outside of the lamp or into the inside of the lamp. I haven't released it. Therefore, there is no risk of spoiling the appearance or blocking the optical path.

[0017] In addition, since it has a simple structure without providing the seal groove 1a or the legs 2a, it is small, lightweight, It can be constructed at low cost.

[0018]

[Effect of the idea]

As explained above, when the vehicle lamp according to the present invention is applied, a. Can be configured to be small and lightweight, b. Since it does not bulge outward, there is no risk of damaging the appearance. c. Since it does not bulge inward, there is no risk of blocking the optical path. d. Excellent sealing performance. This has excellent practical effects.

[Brief explanation of drawings]

[Fig. 1] A sectional view depicting the main parts of the vehicle lamp according to the present invention

[Figure 2] Explanatory diagram of the configuration order as well

[Fig. 3] Cross-sectional view for explaining the configuration of the band in the above embodiment.

[Fig. 4] Cross-sectional view of main parts of a conventional vehicle lamp

[Explanation of symbols]

1 Lamp housing 1a Seal groove 2 Lens 2a legs 3 Hot melt 4 Lens 4a Stepped part 5 Lamp housing 5a Stepped part 6 band 7 Ring groove 8 Mold (Part 1) 9 Mold (Part 2)

Claims (1)

[Scope of utility model registration request] Claim 1: In a vehicular lamp in which a synthetic resin lens is fixed to cover the front opening of a synthetic resin lamp housing, the lamp is positioned at the abutting part of the lamp housing and the lens and goes around the outer periphery of the lamp housing. A groove is provided to
A synthetic resin material that is compatible with both the synthetic resin forming the lamp housing and the synthetic resin forming the lens is injected into the above groove to form the band. Vehicle lighting featuring: