JPH04112405U - 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 to the outer or inner circumference, making the entire lamp smaller, lighter, and cheaper. . [Configuration] Contact surface a between lens 4 and lamp housing 5
A ring groove is provided on the outer periphery of the ring groove, and a recess is provided adjacent to the ring groove to communicate with the ring groove. In addition, the band 6 is formed to fill this ring groove. Thereby, the band connects the lens and the lamp housing in an anchor-like manner.

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, e. The connection between the lamp housing and lens is strong. 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 lip that is located at the contact area between the lamp housing and the lens and goes around the outer circumference of the lamp housing. grooves are provided. A recess is provided adjacent to the ring groove, and a recess is provided adjacent to the ring groove. A communication path between the groove and the recess 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. It is integrated and bonded to fill the recess and form an anchor-like part, resulting in high bonding strength. It also has perfect sealing properties. 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. .

[0011] 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.

0012

【Example】

FIG. 2 shows the lens 4 and lamp housing 5 of the vehicle lamp according to the present invention. It is a drawn cross-sectional view. (A) is the state in which both of the above members are separated, and (B) is the state in which the above two members are separated. Shows the state in which they are in contact.

[0013] A in the figure is a contact surface between the lens 4 and the lamp housing 5. The lens 4 has a stepped portion 4a formed by cutting out the contact surface B, and 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 7. A band 6 is injection molded to fill the recess as shown in FIG. 1(A).

[0014] An explanatory diagram of the shape of part b shown in figure (A) above is shown in figure 1 (B), and its view in the direction of arrow c is shown in figure 1 (B). It is shown in FIG. 1(C). 7 is a ring groove provided across the contact surface a. Short groove-shaped recesses 11 are provided adjacent to both sides of the ring groove 7. A communication path 12 is provided between the ring groove 7 and the recess 11.

[0015] 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.

[0016] In this example, the lens 4 is made of acrylic resin. and lamp housing 5 was made of polycarbonate. Band 6 was composed of ABS. As a result, the band 6 is concave with respect to both the lens 4 and the lamp housing 5. Fill the parts to form an anchor-like bond that firmly and watertightly connects both parts. Ru.

[0017] Moreover, since the band 6 tends to shrink after injection molding, the above bond becomes even stronger. It becomes hard.

[0018] 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.

[0019] 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.

[0020] When implementing this invention, each component of the lens, lamp housing, and band shall be Even if there is no compatibility between the synthetic resins used, a strong bond can be obtained and a perfect seal can be achieved. can get.

[0021] FIG. 5 shows a different embodiment from the above. FIG. 5(A) shows FIG. 1(B) in the above embodiment. ), and FIG. 5(B) is a plan view corresponding to FIG. 1(C). be. 5' is a lamp housing, and 4' is a lens. 7' is a ring groove corresponding to the ring groove 7 in the previous embodiment.

[0022] A round hole-shaped recess 13 is formed on both sides adjacent to the ring groove 7'. There is. A communication path 14 is provided between the round hole-shaped recess 13 and the ring groove 7'.

[0023] Even when synthetic resin is injected and solidified into the groove as shown in Figure 1(B), Even when synthetic resin is injected and solidified into the groove as shown in A), the solidified synthetic resin The fat band fills the recesses 11 and 13 to form an anchor shape, and connects the lens and lamp housing. to firmly connect the

[0024]

[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, e. Excellent practical effect as the lens and lamp housing are firmly connected play.

[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

[Fig. 5] Explanatory diagram of an embodiment different from the above

[Explanation of symbols] 1 Lamp housing 1a Seal groove 2 Lens 2a legs 3 Hot melt 4,4' lens 4a Stepped part 5,5' lamp housing 5a Stepped part 6 band 7,7' Ring groove 8 Mold (Part 1) 9 Mold (Part 2) 11 Groove-shaped recess 12 Communication path 13 Round hole-shaped recess 14 Communication path

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 housing is positioned at the abutting part of the lamp housing and the lens, and the lamp is placed around the outer periphery of the lamp housing. A groove is provided to
A recess is provided adjacent to the ring groove, and a communication path between the ring groove and the recess is provided, and a synthetic resin material is injected into the groove to form a band. A vehicle lighting device characterized by: