JPH0753210Y2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicular lamp that is installed inside a rear window of a vehicle such as an automobile to display a warning to a driver of a following vehicle. The present invention relates to a vehicular lamp configured to prevent thermal deformation of an elongated substrate caused by heating of a light emitting element.

[Conventional technology]

2. Description of the Related Art Conventionally, a vehicular lamp called a high mount stop lamp has been widely used as a vehicular signal lamp for displaying a warning to a driver of a following vehicle in order to ensure safety in road traffic. This type of vehicular lamp has a slender board having a large number of light emitting diodes, light emitting chips, and other light emitting elements mounted in parallel in a lamp chamber formed by a body and a lens, and the board is used as a body. Or a notch 52 is formed in the central portion of the substrate 51 and the notch 52 is projected inside the body 53 or the lens as shown in FIG. In order to prevent the movement of the substrate 51 in the surface direction due to the thermal expansion while being fitted and fixed to the joint portion 54, a large number of protrusions 55 are formed in the upper and lower edges of the body 53, and the protrusions 55 are formed on the protrusions 55. A means of sandwiching and fixing the peripheral edge of the substrate 51 is used.

[Problems to be solved by the device]

However, in the above-mentioned conventional structure, since the large number of protrusions 55 are formed inside the upper and lower edges of the body 53,
Not only does the structure of the molding die for the body 53 and the lens body become complicated, but also when the substrate 51 is assembled to the body 53, the projection 55 having the edge of the substrate 51 formed on the body 53 side is formed. There is a problem that the workability of assembling is extremely poor because it must be raised and fitted.

Moreover, the notch 52 formed in the center of the substrate 51
Although it is engaged and fixed to the engaging portion 54 on the 53 side, since both ends of the substrate 51 are in an open state, the structure is not completely fixed in the lamp chamber, and so-called chatter noise is generated during traveling. There were also problems such as doing.

The present invention has been made in view of the above problems, and an object thereof is to provide a vehicular lamp that can prevent thermal deformation of a substrate with a simple structure and can be quickly assembled. .

[Means for Solving the Problems]

In order to achieve the above object, a vehicular lamp according to the present invention includes a lamp chamber formed by a body and a lens body.
In a vehicular lamp that accommodates a long and narrow board in which a large number of light emitting elements are mounted in parallel and the overall shape is a long rectangular shape in a front view, both sides of the board are provided on the inner surfaces of the left and right walls of the body. A supporting groove composed of a pair of upright walls is formed so as to be sandwiched, and the rear end portion of the inner bottom of the body is continuous with the supporting groove so as to engage and fix the lower end edge of the substrate, and the left-right direction A groove extending to the inside of the body, and a plurality of protrusions for preventing the rearward movement of the substrate are formed on the inner surface of the rear wall of the body in the vertical direction so that the edges of the protrusion are aligned with the edges of the groove. The gist is to form a plurality of protrusions and curved edges for fixing the upper edge of the substrate on the inner top plate surface of the lens body.

Further, an extended edge for heat dissipation can be formed in front of the lens body.

[Action]

According to the above configuration, both sides of the elongated substrate are securely sandwiched and fixed by the support grooves formed on the inner surfaces of the left and right walls of the elongated rectangular body, and thermal deformation in the rear surface direction of the body is prevented. It is prevented by a plurality of protrusions formed on the rear wall at appropriate intervals, and thermal deformation in the front direction is caused by a plurality of protrusions formed in a substantially triangular shape protruding from the inner top plate surface of the lens body. It is possible to prevent a large deformation that occurs in the entire substrate while allowing a slight thermal deformation along.

Further, both sides of the elongated substrate are inserted into the support grooves formed on the inner surfaces of the left and right walls of the body, and the lower end edge of this substrate is formed in the left-right longitudinal direction while being in contact with the end edge of the projecting piece. The upper edge of the substrate is fixed by the projections formed inside the lens body and the curved edges formed on the inner surfaces of the left and right walls of the lens body only by engaging and fixing in the groove and then covering the lens body. Therefore, the assembling work can be completed in a short time.

Further, since the expansion edge for heat dissipation can be formed in front of the body, the heat dissipation effect for the lamp chamber can be enhanced.

〔Example〕

An embodiment of a vehicular lamp according to the present invention will be described below with reference to the drawings.

1 is an overall perspective view of a vehicular lamp, FIG. 2 is an exploded perspective view, FIGS. 3 (a) and 3 (b) are enlarged sectional views showing one side of the left and right inner walls of the body, and FIG. 4 is the body. FIG. 3 is an enlarged perspective view showing one side of the left and right inner walls of FIG.

The vehicular lamp according to the present invention has a long rectangular shape as a whole when viewed from the front, and is made of a synthetic resin material having at least the front side as a transparent portion.

In the above drawings, the vehicular lamp comprises a substrate 5 in which a large number of light emitting elements 4 are mounted in parallel at appropriate intervals in a lamp chamber 3 formed by a body 1 and a lens body 2. The lower edge 1a is curved and projected forward, and a rubber packing 6 is attached to the front edge thereof. The light emitting element 4
Are arrayed and mounted in at least one horizontal row on the surface of the substrate 5 formed in an elongated shape similarly to the body 1, and the respective light emitting portions cover the body 1 on the front side transmissive portion 2a of the lens body 2.
It is structured so as to be sandwiched between the inner surfaces of the body 1 and the lens body 2 while being supported so as to face each other.

The body 1 is provided with an appropriate number of mounting edges 7 on both ends of the vehicle body or a housing of a spoiler, and the mounting edges 7 are attached to mounting portions (not shown) of the vehicle body such as bolts and nuts. It has a structure in which it is integrally fixed by a fixing member or the like.

Further, the body 1 is opened upward, and a support groove 8 is formed between a pair of standing walls 8a and 8b so as to vertically sandwich both sides 5a and 5b of the substrate 5 on the inner surfaces of the left and right walls thereof. A groove 9 continuous with the support groove 8 and extending in the left-right longitudinal direction at the rear end portion of the inner bottom.
In the longitudinal direction of the rear inner wall, a plurality of projecting pieces 10 whose edges match the edges of the groove 9 are formed in the longitudinal direction at appropriate intervals. Thus, both sides 5a, 5b of the substrate 5 are locked in both support grooves 8 from above the body 1, and the lower edge 5c of the substrate 5 is engaged and fixed in the groove 9 formed in the left-right longitudinal direction. The rear surface can be brought into contact with the edge of the projecting piece 10.

On the inner top plate surface of the lens body 2, as shown in FIG.
As shown in (b), a plurality of protrusions 11 for fixing the upper edge 5d of the substrate 5 are formed. The protrusion 11 is formed by fitting the upper edge 5d of the substrate 5 into the gap x (see FIG. 3B) formed by the rearward edge 2b of the lens body 2 and the curved rearward edge 2c. , The upper edge 5d of the substrate 5 is locked. Therefore,
The substrate 5 is sandwiched between the inner surfaces of the body 1 and the lens body 2, and is fitted and supported between the support groove 8, the groove 9 and the gap x.

When the substrate 5 expands and deforms due to the heat generated by the light emitting element 4 when the vehicle lighting device according to the present invention is lit for a long time such as when inspecting a vehicle, both sides 5a and 5b of the substrate 5 are provided with the support groove 8 and the groove 9.
Even if the substrate 5 tries to be deformed rearward, the deformation is prevented by the vertical projections 10 formed at appropriate intervals in the longitudinal direction of the inner wall, and conversely, the substrate 5 is deformed toward the lens portion side. Regarding thermal deformation, a plurality of projections formed in a substantially triangular shape from the inner top plate surface of the lens body 2 are formed.
11 is a substrate 5 while allowing some deformation along its slope
It is possible to prevent large deformation of the whole.

When fitting the body 1 and the lens body 2, after fitting both sides 5a and 5b of the substrate 5 into the support groove 8 of the body 1, the lens body 2 is covered on the body 1 to cover the lens. The engaging claws 12 projectingly formed on the peripheral edge of the body 2 are flexibly fitted into the engaging holes 13 formed on the side of the body 1 and integrally assembled, so that the assembling work of the vehicle lamp can be performed in a short time. Can be completed.

As shown in FIG. 3A, the inner surface of the front-side transmissive portion 2a of the lens body 2 is provided with a control lens 14 for controlling the luminous flux emitted from the front surface of the light-emitting element 4 for each light-emitting element 4. It has been formed. This control lens 14 is for each light emitting element 4
The optical axis of the condensing lens 15 is arranged on the outgoing optical axis of the above, and a large number of diffusion steps 16 are formed on the surface side. This diffusing step 16 is one in which lens blocks are defined and arranged in parallel so that the front side light flux control range by each condenser lens 15 formed on the back side of the control lens 14 is defined as one section. The light flux emitted from each light-emitting element 4 is formed by regularly or randomly arranging the light-emitting elements 4 at regular intervals within each condenser lens 15.
Also, the light is controlled and emitted by the diffusion step 16 formed for each lens block to obtain a predetermined luminous intensity distribution as a vehicular lamp.

The lower edge 2d of the lens body 2 is formed to have a size that partially overlaps with the lower edge 1a of the body 1 so that the amount of heat of the light emitting element 4 generated in the lamp chamber 3 from the portion 2a is conducted and radiated. The structure is such that irregularities are appropriately formed on the surface thereof to increase the heat dissipation area, and at the same time, the reflection effect of external light on the surface side is suppressed.

Regarding the combination method of the diffusion step 16 parts and the condensing lens 15 parts, the number of formed lens blocks, etc., the design is appropriately changed in accordance with the brightness and the light distribution pattern as a lamp required for a vehicle lamp, etc. Of course, it can be configured by the diffusing structure or the lens element.

Further, since the expansion edge 17 which is curved in the left and right longitudinal direction in front of the lens body 2 has a high heat dissipation effect, the thermal expansion deformation of the substrate 5 can be suppressed.

[Effect of device]

Since the vehicular lamp according to the present invention is configured as described above, the substrate is securely clamped and fixed in the body body, and the thermal deformation caused by thermal expansion of the substrate is left and right in the front and rear directions. Large deformation in the direction can be prevented.

Further, in the assembling work of the vehicle lamp, by inserting the substrate into the support grooves formed on the inner surfaces of both the left and right walls of the body and covering the lens body, the protrusion formed inside the lens body The upper edge of the substrate can be fixed, and the work can be completed in a short time.

Furthermore, since the expansion edge for heat dissipation is formed in front of the lens body, it is possible to enhance the heat dissipation effect to the lamp chamber and suppress the thermal deformation of the substrate. large.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a vehicular lamp according to the present invention, FIG. 2 is an exploded perspective view of the same, and FIGS. 3 (a) and 3 (b) show one side of the left and right inner walls of the body. (a) is an enlarged sectional view, (b) is an exploded enlarged sectional view, FIG. 4 is an enlarged perspective view of the same, and FIG. 5 is an exploded perspective view of a conventional vehicle lamp with a part thereof omitted. DESCRIPTION OF SYMBOLS 1 ... Body body, 2 ... Lens body 3 ... Lamp room, 4 ... Light emitting element 5 ... Substrate, 8 ... Support groove 9 ... Groove, 10 ... Projection piece 11 ... Protrusion

Claims (1)

[Scope of utility model registration request] 1. A vehicle for accommodating a long and narrow substrate having a large number of light emitting elements mounted in parallel in a lamp chamber formed by a body and a lens, and having an overall rectangular shape in a front view. In the lamp, a support groove formed of a pair of upright walls is formed on each of the inner surfaces of the left and right walls of the body so as to sandwich both sides of the board, and the board is provided at the rear end of the inner bottom of the body. A groove extending in the left-right direction is formed so as to be continuous with the support groove so as to engage and fix the lower end edge of the base body, and a plurality of rear wall inner walls that prevent the rearward movement of the substrate are formed. A protruding piece is formed so as to project in the vertical direction so that the edge thereof coincides with the edge of the groove, and a plurality of protrusions for fixing the upper edge of the substrate are formed on the inner top plate surface of the lens body. A vehicle lamp characterized by the above.