JPH0610565Y2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The details of the vehicle lighting device of the present invention will be described in accordance with the following items.

A. Industrial application fields B. Outline of Invention C. Prior art [Fig. 9] D. Problems to be solved by the invention [Fig. 9] E. Means for Solving the Problems F. Example [FIGS. 1 to 8] a. Overview [Fig. 1] b. Lens body c. Cover body d. Printed circuit board e. Action [Fig. 8] G. Effect of the Invention (A. Industrial Application Field) The vehicle lighting device of the present invention relates to a new vehicle lighting device. Specifically, when forming a lens body having a concave portion opened upward or downward by two molding dies that are moved in the vertical direction, the convex portion marked on the front surface should not be an undercut portion. An object of the present invention is to provide a novel vehicular lamp in which a slanted surface portion is formed on the outer surface of the front surface portion on the side opposite to the opening of the lens body so that marking processing can be performed at low cost without using a slide core.

(B. Outline of the Invention) The vehicular lamp of the present invention has a concave portion that opens upward or downward, and a lens body that is inclined so that the front surface portion is displaced forward as it goes to the opening side, and the opening of the lens body. In a vehicular lamp including a cover body that covers the cover and a plurality of light sources arranged in a space defined by the lens body and the cover body, the vehicular lamp is formed by a pair of molding dies that are vertically moved. A marking slope is formed on the front surface of the lens body on the side opposite to the opening side, and the slope area for marking is directed toward the front side and the direction opposite to the opening side. It is designed to be smaller and the front end face of the convex part formed by marking formed on the slope part is displaced rearward as it goes downward, so that the marking process does not use a slide core. A pair of molding dies can be used at low cost.

(C. Prior Art) [FIG. 9] There is a vehicular lamp having a concave portion opened upward and a lens body whose front portion is inclined so as to be displaced forward as it goes to the opening side. A so-called high-mount stop, which is arranged in the vehicle body or inside the vehicle at a position higher than the position of the stop light provided at the rear of the vehicle body so that the intention to stop can be displayed to the following vehicle with good visibility. There is something called a lamp.

FIG. 9 shows an example of a lens body a in such a conventional vehicular lamp.

The lens body a has a concave portion b that opens upward, and a front surface portion c that is inclined so as to be displaced forward as it goes to the opening side.

An inclination of a tangent plane d (which extends in a direction perpendicular to the paper surface, but shows only a line of intersection with the paper surface in the drawing) of the front surface of the opening-side end of the front surface portion c with respect to a vertical axis e extending in the vertical direction. Lens body b is molded by a pair of molding dies f and f'which are moved in the vertical direction so that the lens has a predetermined value (.theta..degree.). , A convex portion g, g, ... Is formed at a position closer to the lower side of the front face portion c to perform so-called marking processing for displaying each type of the lamp and the like.

(D. Problem to be Solved by the Invention) [FIG. 9] However, when the inclination angle θ of the front surface portion c of the lens body a becomes small to some extent (usually about 30 ° or less), the convex portion g due to marking is formed. Does not come off from the molding die f'and becomes an undercut portion, so that the pair of molding dies f and f'cannot be molded.
As shown by the two-dot chain line in the figure, there is no choice but to mold using the slide core h, which raises the problem of increasing the manufacturing cost.

(E. Means for Solving the Problem) In order to solve the above-mentioned problem, the vehicular lamp of the present invention has a lens body formed by a pair of vertically movable molds on the side opposite to the opening side. Forming a slope portion for marking facing the front and the counter opening direction on the front surface portion, and the front projection area of the slope portion is equal to or smaller than the projection area in the counter opening direction, In addition, the front end surface of the convex portion formed by the marking formed on the slope portion is displaced rearward as it goes downward.

Therefore, according to the vehicular lamp of the present invention, since the convex portion marked on the slope does not become the undercut portion of the mold on the non-opening side, the lens body can be molded by the pair of molding dies, and the manufacturing cost can be reduced. It does not cause the rise of.

(F. Embodiment) [FIGS. 1 to 8] The details of the vehicular lamp of the present invention will be described below with reference to the illustrated embodiment. In this embodiment, the present invention is applied to a stop light 1 attached to a rear spoiler of an automobile.

(A. Outline) [FIG. 1] Reference numeral 2 in the figure denotes a rear spoiler of an automobile, which has a notch 3 which is open to the rear and the lower side and which is long in the left-right direction on the lower surface of the rear end, and complements the notch 3. Thus, the stop light 1 is attached.

(B. Lens Body) 4 is a lens body, which is formed of a transparent thermoplastic synthetic resin by molding. Since the lamp 1 is a stop lamp, the lens body 4 is colored and transparent in the functional color red.

The bottom plate 5 of the lens body 4 is curved so that its front end (the front-rear direction with respect to the lamp 1 is the front of the vehicle is the front and the front of the vehicle is the rear). The front portion 6 is integrally formed in a shape in which the curvature becomes deeper and rises upward from about a third position from the top.

That is, the angle formed by the tangent plane 6a on the front surface near the upper end of the front surface portion 6 with respect to the vertical axis 7 (this is φ °) is 3.
It is set to about 0 °.

The front shape of the lens body 4 is elongated in the left-right direction, and its end portion is bulged outward, and the slope 8 for marking is located at the lower right of the front surface 6 in the front diagonally downward direction. It is formed to face. That is, the slope 8 of the slope 8
The angle θ formed by a with respect to the vertical axis 7 is set to 45 ° or more. Therefore, as shown in FIG. 7, the area of the slope 8a when viewed from the front, that is, the projection of the slope 8a to the front is shown. The area S _F is smaller than the projected area S _L of the slope 8a projected downward. It should be noted that the upper limit of the inclination angle θ is an angle at which a character or the like marked on the slope 8a can be visually recognized from the front when the lens body 4 is molded, and therefore the front projection area _SF
It goes without saying that = 0 (θ = 90 °) is not included.

.. are convex portions marked on the inclined surface portion 8 at the time of molding the lens body 4, and the convex portions 9, 9, ... Do not become undercut portions of the anti-opening side mold described later. As described above, the front end face is displaced rearward as it goes downward.

Reference numeral 10 denotes a rear wall that is erected from the rear end of the bottom plate 5, and the recessed portion 1 facing rearward is provided at a portion near the center and a portion near both ends.
, Are formed, thereby forming projecting walls 12, 12, ... That project rearward in a plan view. The rear wall of the central projecting wall 12A among the projecting walls 12, 12, ... Is slanted so as to face obliquely rearward and downward, and a drawing hole 13 is formed in the projecting wall 12A.

Reference numerals 14 and 14 denote side walls, which are provided so as to project upward from the bottom plate 5 at both left and right ends of the lens body 4.

The upper ends of the front surface portion 6, the rear wall 10, and the side walls 14 and 14 are formed to be substantially in the same plane to form the opening edge 15, and the housing recessed portion facing upward by being surrounded by these. 16 is formed so that a printed circuit board and the like, which will be described later, can be accommodated therein. And the opening edge 15
A shallow notch 15a is formed on the inside of the.

Reference numerals 17, 17, ... Are mounting pieces, and the recesses 11, 11, ...
.. of the rear wall 10 that forms .. the stepped parts 11a, 11a, ... Has been done. The mounting pieces 17, 17, ...
Attachment holes 17a, 17a, ... Are formed in the center of each circle.

A plurality of protrusions 18, 18, ... Are formed on the inner surface of the bottom plate 5 side by side in the left-right direction and at appropriate intervals. .. are formed with engaging grooves 18a, 18a ,.

, 19 are the protrusions 1 on the inner surface of the bottom plate 5.
8, 18, ... Support bosses that are erected from a portion between the formation region and the rear wall 10, are aligned in the left-right direction, and
It is formed with appropriate intervals. Each support boss 19, 19, ... Has a pilot hole 1 opened at its upper end surface.
9a, 19a, ... Are formed.

(C. Cover body) 20 is a cover body having a substantially strip-like shape that is long in the left-right direction,
The lens body 4 is made of the same type of synthetic resin as the synthetic resin.

The cover body 20 has a shape fitted in a notch 15 a formed in the upper opening edge 15 of the lens body 4.

Then, the cover body 20 is fitted into the notch 15a formed in the opening edge 15 of the lens body 4, and in that state, the entire circumference thereof is fixed to the upper opening edge 15 of the lens body 4 by ultrasonic fusion. It

(D. Printed circuit board) 21 is a printed circuit board having a small vertical width and a strip shape long in the left-right direction.

The LEDs 22, 22, ... Are arranged on the front surface of the printed board 21 in a line in the left-right direction.

Reference numeral 23 is a pair of cords, one end of which is connected to the printed conductor on the printed board 21.

In this printed circuit board 21, the cover body 20 has the lens body 4
, The lower edge portion is engaged with the engaging grooves 18a, 18a, ... Formed on the inner surface of the bottom plate 5 of the lens body 4.

Reference numeral 24 is a rubber bushing attached to a lead-out hole 13 formed in the inclined projection wall 12A of the lens body 4, and the cord 23 is an insertion hole 24 formed in the bushing 24.
The rear lens body 4 is pulled out to the outside of the accommodation recess 16 through a.
Cord clamp piece 25 formed integrally with the protruding wall 12A of the
It is designed to be held by the groove 25a.

In this way, if the rear wall 10 of the lens body 4 is partly inclined and the extraction hole 13 is formed in the rear wall 10, even if the lens body 4 has a small thickness in the vertical direction, a rubber bushing of a size suitable for this is used. Since it is not necessary to do so, the sizes of parts can be unified.

The end of the cord 23 pulled out of the lamp in this way on the side opposite to the printed circuit board 21 is connected to the power supply terminal of the lighting circuit by a connector (not shown).

26, 26, ... are pressing pieces, which are formed of a metal plate having eccentric elasticity, have a substantially crank shape when viewed from the side, and have high front end portions 26a, 26a ,. The rear end portions 26b, 26b, ... Are located low.

The mounting screws 28, 28, ... Inserted from above into the mounting holes 27, 27, ... Formed in the rear end portions 26b, 26b ,.・
Are self-locked by being screwed into the lower holes 19a, 19a, ....

The pressing pieces 26, 26, ... Have rear end portions 26b, 26.
, are supported by the support bosses 19, 19, .., and their front end portions 26a, 26a, .. It is designed to be slightly lower than the upper edge.

Therefore, the presser pieces 26, 26, ...
When the rear end portions 26b, 26b, ... Are fixed to the support bosses 19, 19, ... With the a, 26a ,. Part 2
6a, 26a, ... Are pressed upward by the upper edge of the printed circuit board 21 to cause a slight warp, and an elastic force to move the front end portions 26a, 26a ,. Are stored, and the elastic force pushes the printed circuit board 21 downward. And each presser piece 2
.. operate independently, so that all the pressing pieces 26, 26, ... Press the printed circuit board 21 completely.

(E. Action) [FIG. 8] The slope 29a of the pair of molding dies 29, 29 'that forms the outer surface of the lens body 4 corresponds to the slope 8a of the lens body 4 (however, 45 °). ≦ θ <90 °) and a concave portion having a shape corresponding to the convex portion 9 formed so as not to be the undercut portion of the molding die 29 ′ is formed on this inclined surface. Type 4 lens body
Marking can be realized at the same time as molding.

(G. Effect of the Invention) As is apparent from the above description, the vehicle lighting device of the present invention has the concave portion that opens upward or downward, and the front surface is inclined so as to be displaced forward as it goes to the opening side. In a vertical direction in a vehicular lamp including a formed lens body, a cover body that covers the opening of the lens body, and a plurality of light sources arranged in a space defined by the lens body and the cover body. The front surface portion of the lens body formed by the pair of moving molds on the side opposite to the opening side is formed with a marking sloped surface facing forward and in the direction opposite to the opening direction, and the projected area of the sloped surface in the front is opposite. It is characterized in that it is equal to or smaller than the projected area in the opening direction, and that the front end surface of the convex portion formed by the marking formed on the inclined surface portion is displaced backward as it goes downward.

Therefore, since the convex portion marked on the slope does not become the undercut portion of the mold on the non-opening side, the lens body can be molded by the pair of molding dies, and the manufacturing cost is not increased.

It should be noted that, in the above-described embodiment, as the inclined surface portion of the lens body 4, an example in which the angle θ of the inclined surface with respect to the vertical axis is constant over the entire surface of this inclined surface has been described, but the invention is not limited to this. The angle θ may be partially changed according to the size of characters and the like.

[Brief description of drawings]

1 to 8 show an example of the implementation of the vehicular lamp of the present invention. FIG. 1 is a perspective view showing an example of use of the vehicular lamp, and FIG. 2 is a partial cutaway of the vehicular lamp. FIG. 4 is a plan view showing a cutaway view, and FIG.
The figure is an enlarged sectional view taken along the line IV-IV in FIG. 2, and FIG.
FIG. 6 is an enlarged cross-sectional view taken along the line VV of FIG.
FIG. 7 is an enlarged end view taken along line VI, FIG. 7 is a perspective view of a main part, FIG. 8 is an enlarged vertical sectional view showing the main part of the lens body, and FIG. 9 is an example of the lens body in a conventional vehicular lamp. It is a longitudinal cross-sectional view of a main part. DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 4 ... Lens body, 6 ... Front surface portion, 8 ... Slope surface portion, 9 ... Convex portion, 16 ... Concave portion, 20 ... Cover body, 22 ... Light source, 29, 29 '... a pair of molding dies, S _F ... projected area of the sloped part forward, S _L ... projected area of the sloped part in the direction opposite to the opening direction

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B60Q 1/44 8715-3K

Claims (1)

[Scope of utility model registration request] 1. A lens body having a concave portion opening upward or downward, and a front surface portion inclined so as to be displaced forward as it goes to the opening side, a cover body covering the opening of the lens body, and a lens body. In a vehicular lamp including a plurality of light sources arranged in a space defined by a cover body and a cover body, a front surface portion of a lens body opposite to the opening side formed by a pair of molding dies vertically moved. A slope portion for marking facing the front and the counter-opening direction is formed, and the front projection area of the slope portion is equal to or smaller than the projection area in the counter opening direction, and, A vehicular lamp characterized in that the front end surface of the convex portion formed by marking formed on the slope portion is displaced rearward as it goes downward.