JP2023077565A - Cover for vehicular marker lamp - Google Patents

Abstract

To secure high functionality and to achieve improvement in designability.SOLUTION: A cover of vehicular marker lamp which is mounted on a lamp housing having an opening in a state of covering the opening, in which light emitted from a light source is transmitted, and which is formed by injection molding using a metal mold includes: a first step formed as a cylindrical lens step in which a plurality of recessed parts extending in a predetermined direction is continuously arrayed; and a second step having a plurality of frame-like parts formed by four linear projection parts inclined with respect to a predetermined direction. The four linear projection parts are provided in a state of crossing with respect to the recessed parts, and the plurality of frame-like parts is provided continuously in a predetermined direction.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a technical field of a vehicle indicator light cover that is attached to a lamp housing and through which light emitted from a light source is transmitted.

Some types of vehicular indicator lamps have a light source and various other optical components placed inside a lamp housing that consists of a cover and a lamp housing, and a lens step is formed on the inner surface of the cover. See Document 1 and Patent Document 2).

In a vehicular marker lamp having a cover formed with such a lens step, the light emitted from the light source is controlled by the lens step. Improvements can be made. In addition, since the appearance of the cover when viewed from the outside changes depending on the shape of the lens step and the position of formation on the cover, designability can be improved by forming the lens step in the desired position and in the desired shape. It is also possible to plan

JP-A-2000-322904 JP-A-9-58336

By the way, in the cover as described above, since the light emitted from the light source is controlled by the lens step, it is desired that the lens step be formed in a shape and position having high functionality.

In addition, since the appearance of the cover when viewed from the outside changes depending on the shape and position of the lens step, it is desirable to improve the design while ensuring high functionality.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cover for a vehicular marker lamp to ensure high functionality and improve design.

A vehicle marker lamp cover according to the present invention is attached to a lamp housing having an opening so as to cover the opening, transmits light emitted from a light source, and is formed by injection molding using a mold. A first step formed as a cylindrical lens step in which a plurality of concave portions extending in a predetermined direction are continuously arranged, and four linear convex portions inclined with respect to the predetermined direction. and a second step having a plurality of frame-shaped portions formed by a second step, wherein the four linear protrusions are provided in a state of intersecting the recesses, and the plurality of frame-shaped portions are arranged in the predetermined direction It is provided in succession to

As a result, light is emitted from the light source by the first step formed as a cylindrical lens step in which concave portions are arranged and the second step having a plurality of frame-shaped portions formed by convex portions inclined with respect to the first step. light is controlled.

According to the present invention, a light source is formed by a first step formed as a cylindrical lens step, in which concave portions are arranged, and a second step having a plurality of frame-shaped portions formed by convex portions inclined with respect to the first step. Since the light emitted from is controlled, good light distribution control is mainly performed by the first step, and the combination of the first step and the second step increases visibility and ensures high functionality. It is possible to improve the designability.

FIG. 2 to FIG. 6 show an embodiment of a cover for a vehicle marker lamp according to the present invention, and this figure is a sectional view of the vehicle marker lamp. It is a front view of a cover. It is a rear view of a step formation part. 4 is a cross-sectional view taken along line IV-IV of FIG. 3; FIG. FIG. 4 is a cross-sectional view taken along line VV of FIG. 3; It is a figure which shows measurement data.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for implementing a cover for a vehicle marker lamp according to the present invention will be described below with reference to the accompanying drawings. Covers are used, for example, in vehicular marker lights, which are tail lamps, stop lamps, turn signal lamps, clearance lamps, etc., and combination lamps in which these various lamps are combined.

In the following description, the forward, backward, upward, downward, leftward, and rightward directions will be described with the direction of light emitted from the vehicular marker lamp being the front. However, the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

A vehicle marker lamp 1 is attached to, for example, both left and right ends of a vehicle body, and includes a lamp housing 2 having an opening at the front end and a cover 3 closing the opening of the lamp housing 2 (see FIG. 1). A lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and an internal space of the lamp housing 4 is formed as a lamp chamber 5 . A mounting hole 2a is formed through the lamp housing 2 in the front-rear direction.

The cover 3 is formed by injection molding using a mold. Therefore, each part of the cover 3 is integrally formed by solidifying the molten resin filled in the mold.

A lamp unit 6 is arranged in the lamp chamber 5 . The lamp unit 6 has a reflector 7 , a holder 8 , an extension 9 and a light source 10 .

The reflector 7 is formed in a shallow concave shape that opens forward, and the inner surface (front surface) is formed as a reflecting surface 7a. An insertion hole 7b is formed through the reflector 7 in the front-rear direction.

The holder 8 is formed in a tubular shape penetrating in the front and rear direction, and the rear end portion thereof is attached to the outer peripheral portion of the reflector 7 . The inner surface of the holder 8 may be formed as a reflective surface.

The extension 9 has a base surface portion 11 facing substantially in the front-rear direction and a cylindrical attached portion 12 projecting rearward from the base surface portion 11 . Light transmission holes 11a, 11a are formed in the base surface portion 11 so as to be vertically separated from each other. The light transmission hole 11a is formed in, for example, a horizontally long rectangular shape. The number of light transmission holes 11a is arbitrary.

The extension 9 is attached to the front end of the holder 8 at the rear end of the attached portion 12 . The extension 9 is made of a material having a lower transmittance than the transmittance of light passing through the light transmitting holes 11a, so that light can be transmitted through portions of the base surface 11 other than the light transmitting holes 11a and 11a. may have been

As the light source 10, for example, a light bulb type is used. However, a light emitting diode (LED) may be used as the light source 10 . The light source 10 has a socket portion 10a and a light bulb portion 10b, and is attached to the lamp housing 2 by inserting the socket portion 10a into the attachment hole 2a. When the light source 10 is attached to the lamp housing 2, the light source 10 is inserted through the insertion hole 7b of the reflector 7, and the light bulb portion 10b is positioned forward of the insertion hole 7b.

The inner surface (rear surface) of the cover 3 is formed with step forming portions 13, 13 separated vertically (see FIGS. 1 and 2). Although FIG. 2 is a front view of the cover 3, the lines of the step forming portions 13, 13 formed on the inner surface of the cover 3 are indicated by solid lines for easy understanding.

The step forming portions 13, 13 are located directly in front of the light transmitting holes 11a, 11a of the extension 9, respectively, when the cover 3 is attached to the holder 2 (see FIG. 1). The number and position of the step forming portions 13 are arbitrary, and the number of the step forming portions 13 may be one, or three or more may be formed separated vertically.

The step forming section 13 is composed of a first step 14 and a second step 15 (see FIGS. 2 and 3). The first step 14 and the second step 15 are formed in the same area of the cover 3. As shown in FIG.

The first step 14 is formed as a cylindrical lens step, and is formed by continuously lining up a plurality of concave portions 16 extending in a predetermined direction, for example, the horizontal direction (see FIGS. 3 and 4). The recess 16 is open rearward, and the surface forming the recess 16 is curved.

The first step 14 is a lens step that has a role of ensuring performance requirements for light distribution of the light emitted from the vehicular marker lamp 1 toward the outside, and has a function of diffusing the light.

In the first step 14, the left-right direction, which is a predetermined direction, is the length direction, and the direction (vertical direction) orthogonal to both the predetermined direction and the depth direction (front-rear direction) of the recess 16 is the width direction. The width W1 of the recess 16 is set to 1 mm or more and 15 mm or less, and the depth H1 of the recess 16 is set to 0.1 mm or more and 0.4 mm or less.

The second step 15 is composed of a plurality of rhombus- or square-shaped frame-shaped portions 17 continuously arranged in the above-described predetermined direction, for example, in the horizontal direction (see FIG. 3). The frame-shaped portion 17 is formed by four linear protrusions 18 projecting rearward, and the protrusions 18 are inclined with respect to the extending direction of the recesses 16 . The convex portion 18 is formed so as to cross the concave portion 16 .

In the step forming portion 13, for example, four concave portions 16 are continuously formed in the vertical direction to form the first step 14, and the continuous portion 17a of the adjacent frame-shaped portions 17, 17 is divided into two in the vertical direction. It coincides with a continuous portion 16 a between the first recess 16 and the third recess 16 . The frame-shaped portion 17 is formed so that the upper end portion 17b and the lower end portion 17c are aligned with the upper and lower end portions of the first step 14, respectively.

Thus, in the cover 3, the continuous portion 17a of the frame-shaped portions 17, 17 and the continuous portion 16a of the concave portions 16, 16 are aligned.

Therefore, since the continuous portion 17a of the adjacent frame-shaped portions 17, 17 and the continuous portion 16a of the adjacent recessed portions 16, 16 are located at the same position, the frame-shaped portion 17 is symmetrical with respect to the plurality of recessed portions 16 that are continuously arranged. Since the cover 3 can be formed at a suitable position, the appearance when the cover 3 is viewed from the outside is improved, and the design of the cover 3 can be improved.

Further, as described above, since the projections 18 are inclined with respect to the direction in which the recesses 16 extend, the fluidity of the molten resin increases during the injection molding of the cover 3, thereby ensuring good moldability of the cover 3. is made possible.

In the second step 15, the direction in which the projection 18 extends is the length direction, and the direction perpendicular to both the direction in which the projection 18 extends and the height direction is the width direction. The convex portion 18 is formed to have an isosceles trapezoidal cross-sectional shape (see FIG. 5). The convex portion 18 has a width W2 of 1 mm or more and 15 mm or less, a height H2 of 0.2 mm or less, and a base angle A of 30 degrees or less in cross section.

The second step 15 also has a function of making it difficult to see the light source 10 arranged in the lamp chamber 5 from the outside, making it possible to improve visibility when the cover 3 is seen from the outside. ing. Therefore, visibility can be improved regardless of the type of light source used for the vehicle marker lamp 1, and the manufacturing cost of the vehicle marker lamp 1 can be reduced by using the low-cost bulb-type light source 10. can be achieved.

As described above, the cover 3 is formed by injection molding using a mold, and the position of the gate G, which is the inlet of the molten resin, is the continuous portion 17a of the adjacent frame-shaped portions 17, 17 ( See Figure 2).

By positioning the gate G at the continuous portion 17a, the gate G is positioned at the continuous portion 17a of the frame-shaped portions 17, 17 which coincides with the continuous portion 16a of the concave portions 16, 16, so that the gate marks are conspicuous. Therefore, the design of the cover 3 can be improved.

It should be noted that the position of the gate G is desirably formed in the central portion of the cover 3 . By forming the position of the gate G in the central portion of the cover 3, it is easy to ensure high fluidity of the molten resin up to the region forming the outer peripheral portion of the cover 3 in the cavity of the mold, resulting in the occurrence of weld lines. High formability of the cover 3 can be ensured without any

In the vehicle marker lamp 1 configured as described above, when light is emitted from the light source 10, the emitted light is reflected by the reflecting surface 7a of the reflector 7 or travels toward the cover 3 as direct light. The light directed toward the cover 3 is transmitted through the light transmission holes 11a, 11a of the extension 9, and transmitted through the step forming portions 13, 13 of the cover 3, and is irradiated to the outside. At this time, the light is directed to the outside while being controlled by the step forming portions 13, 13, especially the first steps 14, 14. As shown in FIG.

The light transmitted through the step forming portions 13, 13 of the cover 3 is mainly controlled by the first steps 14, 14, and is controlled by the second steps 15, 15 in addition to the first steps 14, 14. is also controlled and irradiated to the outside.

Measurement data obtained by simulation for each dimension of the first step 14 and the second step 15 will be described below (see FIG. 6).

In the measurement by simulation, the first step 14 was confirmed with respect to two items, that is, the fluidity of the molten resin when the width W1 and the depth H1 of the concave portion 16 were changed, and the formation state of an appropriate light distribution pattern. As for step 15 of 2, confirmation was made on two items, moldability of the cover 3 and designability of the cover 3 when the width W2 and height H2 of the projection 18 and the base angle A were changed.

In FIG. 6, "○" indicates that each item is "extremely good", "△" indicates that each item is "good", and "×" indicates that each item is "bad". is shown.

With respect to the width W1 of the concave portion 16, two items, that is, the fluidity of the molten resin and the state of formation of an appropriate light distribution pattern, were checked for less than 1 mm, 1 mm, 8 mm, 10 mm, and 15 mm.

Regarding the fluidity of the molten resin with respect to the width W1 of the concave portion 16, it was confirmed that when the width W1 was less than 1 mm, the fluidity of the molten resin was low and the cover 3 could not be processed, resulting in a "defective" condition. and 15 mm, it was confirmed that the fluidity of the molten resin was high and "extremely good". Regarding the state of formation of an appropriate light distribution pattern with respect to the width W1 of the concave portion 16, in the case of 15 mm, the light distribution pattern may be slightly insufficiently formed with respect to the originally required light distribution pattern, but it is "good". In the case of less than 1 mm, 1 mm, 8 mm and 10 mm, it was confirmed that an appropriate light distribution pattern was formed and was "very good".

With respect to the depth H1 of the concave portion 16, there are two items: the fluidity of the molten resin and the state of formation of an appropriate light distribution pattern for cases of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm or more. was confirmed.

Regarding the fluidity of the molten resin with respect to the depth H1 of the concave portion 16, it was confirmed that when the depth H1 was 0.5 mm or more, a weld line was generated and it was "defective", but when it was 0.3 mm and 0.4 mm, Although there is a risk of occurrence of weld lines, the fluidity of the molten resin is sufficient and it is confirmed that it is "good". It was confirmed that Regarding the formation state of an appropriate light distribution pattern with respect to the depth H1 of the concave portion 16, an appropriate light distribution pattern is formed in any of the cases of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm or more. It was confirmed that it was "extremely good".

As described above, according to the results of the measurement data obtained by the simulation for each dimension in the first step 14, the determination of "defective" is excluded, and the width W1 of the recess 16 is set to 1 mm or more and 15 mm or less, and the depth of the recess 16 is set to 0.5 mm. It is desirable to be 1 mm or more and 0.4 mm or less.

By setting the width W1 of the recess 16 to 1 mm or more and 15 mm or less and the depth of the recess 16 to be 0.1 mm or more and 0.4 mm or less, sufficient fluidity of the molten resin during molding of the cover 3 is ensured. In addition, since sufficient functionality as a cylindrical lens step is ensured with respect to light distribution performance, the occurrence of weld lines can be suppressed and high moldability of the cover 3 can be ensured, and the desired arrangement of the vehicle marker light 1 can be achieved. A light pattern can be reliably formed.

With respect to the width W2 of the projection 18, confirmation was made on two items, moldability of the cover 3 and designability of the cover 3, for cases of less than 1 mm, 1 mm, 3 mm, 10 mm, and 15 mm.

Regarding the moldability of the cover 3 with respect to the width W2 of the projection 18, it was confirmed that when the width W2 was less than 1 mm, the moldability of the cover 3 was low and the cover 3 could not be processed, resulting in a "defective" condition. In the case of 3 mm, 10 mm, and 15 mm, high moldability of the cover 3 was ensured, and it was confirmed that the moldability of the cover 3 was "very good." It was confirmed that it was good. Regarding the design of the width W2 of the convex portion 18, it was confirmed that sufficient design of the cover 3 was ensured in the case of 10 mm and 15 mm, and that it was "good", and in the case of less than 1 mm, 1 mm and 3 mm, the cover 3 It was confirmed that high designability was secured and that it was “extremely good”.

With respect to the height H2 of the convex portion 18, confirmation was made on two items regarding the formability of the cover 3 and the design property of the cover 3 in the cases of 0 mm, less than 0.1 mm, 0.1 mm, 0.2 mm, and 0.3 mm. rice field.

Regarding the moldability of the cover 3 with respect to the height H2 of the protrusions 18, it was confirmed that a weld line was generated in the case of 0.3 mm and was "defective", but a weld line was generated in the case of 0.2 mm. Although there is a possibility that the moldability of the cover 3 is good, it is confirmed that it is "good". It was confirmed that it was good. With respect to the design of the height H2 of the projection 18, it was confirmed that the design of the cover 3 is low and "defective" when the height is 0 mm, and the sufficient design of the cover 3 is secured when the height is 1 mm. In the case of 0.1 mm, 0.2 mm and 0.3 mm, it was confirmed that the high design property of the cover 3 was secured and it was confirmed to be "extremely good".

Regarding the base angle A of the convex portion 18, confirmation was made on two items, the formability of the cover 3 and the design property of the cover 3, for cases of less than 10 degrees, 10 degrees, 15 degrees, 30 degrees, and 35 degrees or more.

Regarding the moldability of the cover 3 with respect to the base angle A of the convex portion 18, it was confirmed that weld lines were generated when the base angle A was 35 degrees or more, indicating that the moldability was "defective." Although there is a risk, good formability of the cover 3 is secured and it is confirmed that it is "good", and in the case of less than 10 degrees, 10 degrees and 15 degrees, high moldability of the cover 3 is secured and "extremely good" It was confirmed that Regarding the design of the base angle A of the convex portion 18, it was confirmed that when the base angle A was less than 10 degrees, sufficient design of the cover 3 was ensured and the design was "good." In the above cases, it was confirmed that the high designability of the cover 3 was ensured and that the cover was "extremely good."

As described above, according to the result of the measurement data by the simulation for each dimension in the second step 15, the judgment of "defective" is excluded, the width W2 of the projection 18 is set to 1 mm or more and 15 mm or less, and the height of the projection 18 is set to It is desirable that the thickness is 0.2 mm or less and the base angle of the cross-sectional shape of the projection is 30 degrees or less.

The width W2 of the protrusion 18 is set to 1 mm or more and 15 mm or less, the height of the protrusion 18 is set to 0.2 mm or less, and the base angle of the cross-sectional shape of the protrusion is set to 30 degrees or less. Since sufficient fluidity of the molten resin is ensured at this time, it is possible to suppress the occurrence of weld lines, ensure high moldability, and improve the design.

As described above, the cover 3 has a first step 14 formed as a cylindrical lens step in which a plurality of concave portions 16 extending in a predetermined direction are continuously arranged, and four straight linear steps inclined with respect to a predetermined direction. a second step 15 having a plurality of frame-shaped portions 17 formed by convex portions 18; provided continuously in the direction.

Therefore, a first step 14 with concave portions 16 formed as cylindrical lens steps lined up, and a second step 15 having a plurality of frame-like portions 17 formed by convex portions 18 inclined with respect to the first steps 14 . controls the light emitted from the light source. As a result, good light distribution control is performed mainly by the first step 14, and the combination of the first step 14 and the second step 15 enhances visibility, ensuring high functionality and designability. can be improved.

2... Lamp housing, 3... Cover, 10... Light source, 14... First step, 15... Second step, 16... Concave portion, 16a... Continuous portion, 17... Frame-shaped portion, 17a... Continuous portion, 18... Convex Department

Claims (5)

A cover for a vehicular marker lamp, which is attached to a lamp housing having an opening so as to cover the opening, transmits light emitted from a light source, and is formed by injection molding using a mold,
a first step formed as a cylindrical lens step in which a plurality of concave portions extending in a predetermined direction are continuously arranged;
A second step having a plurality of frame-shaped portions formed by four linear convex portions inclined with respect to the predetermined direction,
The four linear protrusions are provided in a state of intersecting with the recess,
A cover for a vehicular marker light, wherein a plurality of the frame-shaped portions are continuously provided in the predetermined direction. 2. The vehicular marker lamp cover according to claim 1, wherein a continuous portion of said frame-shaped portion continuous in said predetermined direction and a continuous portion of said continuously arranged recesses are aligned with each other. 3. The vehicle marker lamp cover according to claim 2, wherein a molten resin gate is positioned at a continuous portion of the frame-shaped portion. In the first step, the predetermined direction is the length direction and the direction perpendicular to both the predetermined direction and the depth direction of the recess is the width direction,
The width of the recess is set to 1 mm or more and 15 mm or less,
4. The vehicle marker lamp cover according to claim 1, wherein the recess has a depth of 0.1 mm or more and 0.4 mm or less. In the second step, the direction in which the protrusion extends is the length direction and the direction perpendicular to both the direction in which the protrusion extends and the height direction is the width direction,
The convex portion is formed in an isosceles trapezoidal shape in a cross-sectional shape,
The width of the convex portion is set to 1 mm or more and 15 mm or less,
5. The vehicle according to claim 1, 2, 3, or 4, wherein the height of the projection is 0.2 mm or less, and the base angle of the cross-sectional shape of the projection is 30 degrees or less. beacon cover.

Images