JP2021109369A - Injection-molded article - Google Patents

Abstract

To provide an injection-molded article in which the occurrence is inhibited of sink marks of an injection-molded article having a design part having a predetermined shape and a partition wall adjacent to the design part with a narrow space therebetween.SOLUTION: An injection-molded article (vehicular headlamp 1) comprises a design part (reflecting surface 22a) having a predetermined shape recessed in the back and constituting a required appearance or function, and an opening (42) communicating with the narrow space in a non-design part (partition wall 41a) provided adjacent to the design part with the narrow space therebetween by being continuously folded back from a peripheral edge of the design part. The opening serves as a joint between a cavity side mold and a core side mold in a mold. The joint is provided on a projection part of the mold corresponding to the narrow space, so that the thermal radiation of the mold is enhanced, overheat is prevented, and the generation of a sink mark is suppressed.SELECTED DRAWING: Figure 2

Description

The present invention relates to an injection-molded product, and more particularly to an injection-molded product in which a narrow space is formed between continuous partition walls.

Patent Document 1 discloses a vehicle lighting fixture lamp of a combination lamp including a tail lamp & stop lamp and a turn signal lamp. The first lamp chamber having the reflector of the tail lamp and the stop lamp and the second lamp chamber for accommodating the unit of the turn signal lamp are integrally molded as the lamp body of the vehicle lamp.

JP-A-2002-279808

However, since both lamp chambers are integrally molded so close to each other, the space formed by the reflector of the tail lamp & stop lamp and the partition wall of the turn signal lamp that is continuously folded back is very small. It has become a thing. In the molding die, there is a problem that a cooling circuit cannot be installed in this narrow portion and sink marks (streak patterns) are generated on the reflector due to insufficient cooling.

This case was made with this in mind, and the purpose is injection molding, which includes a design part having a predetermined shape and a non-design part such as a partition wall that is close to the design part with a narrow space in between, like the reflector described above. The purpose is to suppress the occurrence of sink marks on the product.

In order to solve the above problem, the injection-molded article of a certain aspect of the present invention is provided with a design portion having a predetermined shape recessed in the back surface and constituting a required appearance or function, and is continuously provided from the peripheral edge of the design portion. By being folded back, the non-design portion provided adjacent to the design portion across the narrow space is configured to have an opening communicating with the narrow space.

According to this aspect, in the molding die, this opening serves as a joint portion between the cavity side mold and the core side mold. Since the opening communicates with the narrow space, a joint surface is provided on the convex portion of the molding die corresponding to the narrow space. The convex portion of the molding die has an elongated shape, reflecting a narrow space between the design portion and the non-design portion. A cooling circuit for cooling the mold cannot be installed in the elongated portion, and in the conventional form without an opening, heat tends to be trapped in the mold, which causes insufficient cooling of the mold. By providing an opening in the molded product, a joint portion is provided in the convex portion of the molding mold, and the temperature of the convex portion of the elongated molding mold can be transmitted to the other mold through the joint portion. can. Further, since a cooling circuit can be provided in the vicinity of the other mold side that does not have the molding mold convex portion, the cooling function extends to the molding mold convex portion via the joint portion, and the molding mold convex portion The temperature can be lowered. By providing an opening in the molded product for the heat radiation mechanism of the molding die, overheating of the molding die (convex portion of the molding die) is prevented, and the occurrence of sink marks is suppressed.

Further, in one embodiment, the outer shape of the opening has a substantially rectangular shape having two opposing sides, and the opening has a stepped portion of the non-designed portion in a direction opposite to the thickness direction of the two opposing sides. It was configured to be formed offset to.

According to this aspect, the opening having such a shape is formed as a so-called cut-off in the molding die. Normally, the opening is undercut, but by forming the opening in this way, complicated processing and steps such as a split mold are not required, and molding can be easily performed.

Further, in one embodiment, the opening is configured to be formed in the vicinity of the boundary with the design portion, which is folded back from the design portion.

According to this aspect, since the tip of the convex portion of the molding die corresponding to the folded portion of the narrow space is the place where heat is most likely to be trapped in the molding die, the opening is located near the boundary so as to cool the portion. By forming, the cooling effect can be enhanced.

Further, in one embodiment, the opening is configured to be formed in a difficult-to-see portion shielded by the design portion or a non-visible portion blindfolded by a blindfold material when the design portion is viewed from the front.

According to this aspect, the opening can be provided in a place where it is difficult to see, and the influence on the appearance can be minimized.

Further, in one embodiment, the opening is configured to be formed in a standing wall portion of a housing that is continuously formed from the design portion and is open to the front.

According to this aspect, the design portion is not disturbed and the influence on the housing can be minimized.

Further, in a certain aspect, the design portion and the non-design portion are configured to be close to each other toward the folded-back portion which is the boundary.

According to this aspect, the narrow space is configured to become narrower toward the folded portion, and the corresponding convex portion of the molding die also has a tapered shape, and forming an opening in this is for cooling the molding die. The effect will be very high.

Further, in a certain aspect, the design portion is a first lamp chamber having an open front surface from which the irradiation light of the first light source housed is emitted, and the non-design portion is from the peripheral edge of the first lamp chamber. It is a second lamp chamber having a continuously folded surface as a vertical wall and having an open front surface from which the irradiation light of the housed second light source is emitted, and the two lamp chambers are close to each other with the narrow space in between. It is molded as a unit. According to this aspect, in a combination lamp provided with a plurality of light sources such as a vehicle headlight, two light chambers can be integrally molded, so that the number of parts can be reduced and the molding cost and the assembly man-hours can be reduced.

Further, the design portion is an optical reflector that reflects light toward the front, and the non-design portion is a bracket member or a lamp chamber that is continuously folded back from the end portion of the optical reflector and is erected. It was configured to be a standing wall to be formed.

The reflector and bracket, or the light room can be integrally molded with less sink marks, reducing molding costs and assembly man-hours.

As is clear from the above description, according to the present invention, it is possible to suppress the occurrence of sink marks on an injection-molded article having a design portion having a predetermined shape and a partition wall in which the design portion is close to the design portion with a narrow space separated from the design portion.

It is a front view of the headlight for a vehicle provided with the bracket unit (injection molded article) which concerns on 1st Embodiment. It is a vertical sectional view of the lamp for the vehicle. It is a partial cross-sectional view explaining the opening part of the bracket unit which concerns on 1st Embodiment. It is a mold of the bracket unit according to the first embodiment. This is the thermal state of the mold of the bracket unit according to the first embodiment. (A) shows a mold of a molded product without an opening as a conventional example, and (B) shows a mold of the present embodiment having an opening. It is sectional drawing of the headlight for a vehicle provided with the bracket unit (injection molded article) which concerns on 2nd Embodiment. It is a partial cross-sectional view explaining the opening part of the bracket unit which concerns on 2nd Embodiment. It is a mold and molding method of the bracket unit which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating the formation position of the opening of a bracket unit.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The embodiments are not limited to the invention, but are exemplary, and all the features and combinations thereof described in the embodiments are not necessarily essential to the invention. In each figure, based on the front view of the vehicle equipped with the vehicle headlights, each direction (upper: lower: left: right: front: rear = Up: Do: Le: Ri: This will be described as Fr: Re). Further, the ratio of the thickness, width, and length of each member does not reflect the actual ratio, but is a schematic representation of the configuration.

(First Embodiment)
1 and 2 are front views of a vehicle headlight 1 provided with a bracket unit 10 which is an injection-molded product according to the first embodiment of the present invention, and FIG. 2 is a line II-II of FIG. It is a cross-sectional view along.

The vehicle headlight 1 includes a lamp body 2, a front cover 3, a low beam unit LU, a high beam unit HU, and a bracket unit 10. The lamp body 2 has an opening at the front. The front cover 3 is made of a translucent resin, glass, or the like, and is attached to the opening of the lamp body 2.

The low beam unit LU and the high beam unit HU are arranged in a room formed by the lamp body 2 and the front cover 3, and are held by the bracket unit 10.

The low beam unit LU includes a projector-type optical unit Lo1 composed of a light source 21, a reflector 22, and a projection lens 24, which are light emitting elements.

As the light source 21, a semiconductor light emitting element such as an LED (Light Emitting Diode), an LD (Laser Diode), or an EL (Electro Luminescence) element, a light bulb, an incandescent lamp (halogen lamp), a discharge lamp (discharge lamp), or the like can be used. can.

The reflector 22 is configured to guide the light emitted from the light source 21 in a desired direction, and its inner surface is a predetermined reflection surface 22a. The emitted light of the light source 21 is reflected forward by the reflecting surface 22a of the reflector 22 and emitted forward through the projection lens 24 to form a desired light distribution. The projection lens 24 is fixed to the bracket unit 10 by a support member (not shown).

The low beam unit LU is a triple optical unit including an optical unit Lo1 and optical units Lo1 and Lo3 having the same configuration as the optical unit Lo1, and the three optical units Lo1, Lo2 and Lo3 form a low beam light distribution in front of the vehicle. ..

The high beam unit HU is a drawing unit configured to form a predetermined shape and light distribution with the light emitted forward, and is a variable distribution that adapts not only to the high beam light distribution but also to the driving conditions of the vehicle and the surrounding conditions. Can form light.

The high beam unit HU includes a laser light source 31, a scanning mechanism 32, a collimating lens 33 that collects the light emitted from the laser light source 31 and causes it to enter the scanning mechanism 32, a control device 34 that controls the scanning mechanism 32 and the laser light source 31. A projection lens 35 is provided. These components are attached to the housing 36 by a support mechanism (not shown).

The scanning mechanism 32 has a reflecting mirror 32a in which the incident light is rotatably supported in the biaxial direction, and scans the reflected light while rotating the reflecting mirror 32a to form a desired drawing pattern. .. The desired drawing pattern is emitted to the front of the vehicle via the projection lens 35 to form a desired light distribution pattern.

In the present embodiment, the scanning mechanism 32 is adopted as the variable light distribution device in the high beam unit HU, but any pattern such as an LED array, a pixel optical device, and a light deflector light can be formed by any light. Devices may be used. Further, there is no problem even if a reflector type optical unit or a projector type optical unit that forms only a desired light distribution is adopted for the low beam unit LU and the high beam unit HU.

The extension reflector 5 is a blindfold material that blindfolds an unnecessary portion. The mechanical portion and fixed portion of the low beam unit LU and the high beam unit HU are concealed by the extension reflector 5.

(Bracket unit 10)
The bracket unit 10 will be described in detail. FIG. 3 is a perspective view of a part of the bracket unit 10, and the bracket unit 10 is cut out with a predetermined width centered on the line II-II of FIG. FIG. 3A is a rear upper perspective view, and FIG. 3B is a front lower perspective view.

As shown in FIGS. 2 and 3, the bracket unit 10 forms a lamp chamber RL for the low beam unit LU and a lamp chamber RH for the high beam unit HU, and the bracket portions 10a and 10b provided above and below form three bracket units 10a and 10b. It is attached to the lamp body 2 by the aiming screw E. The optical axis of each unit is adjusted in the horizontal direction and the vertical direction by rotating each aiming screw E.

In the present embodiment, a part of the bracket unit 10 constitutes the reflector 22 of the low beam unit LU. Further, the high beam unit HU is installed in the lamp chamber RH formed by using the partition wall 41a which is continuously folded back from the lower end portion of the reflector 22 as a vertical wall.

The light room RH is defined by a partition wall 41a, a partition wall 41b, etc., which are erected in front of the vertical portion 41c of the bracket unit 10. There is also a partition wall (not shown) in the left-right direction of the vertical portion 41c. Hereinafter, when a member that defines the light chamber RH, which is a bag portion that opens forward, is referred to without specifying a particular part, it is simply referred to as a partition wall 41.

The bracket unit 10 is integrally molded with a reflector 22 (light chamber RL), a partition wall 41 defining the light chamber RH, a bracket member for holding and fixing the low beam unit LU and the high beam unit HU. By providing one multifunctional part, the number of parts can be reduced, and the manufacturing cost and the assembly cost can be suppressed.

Here, since the partition wall 41a is configured to be continuously folded back from the lower end portion of the reflector 22, a narrow space SR1 is provided between the reflector 22 and the partition wall 41a on the back surface side of the bracket unit 10. Is formed in.

The partition wall 41a is provided with a stepped portion 43, and the stepped portion 43 is formed with an opening 42 communicating with the narrow space SR1.

The opening 42 is provided in the partition wall 41a in a rectangular shape, but the thickness direction of one side forming the rectangle is opposite to the thickness direction of the other side by using the stepped portion 43 instead of the through hole provided in the flat surface. It is configured to be in the direction. That is, the sides 42a, 42b, 42c, 42d forming a rectangle with the lower surface 41aa of the partition wall 41a form the outer shape of the opening 42, but the side with the ridgeline of the step portion 43 as one side with the lower surface 41aa as a reference. The thickness direction of 42a is downward, and the thickness directions of the remaining three sides 42b, 42c, and 42d are downward.

(Mold of the first embodiment: Cut-off mold)
A method of molding the bracket unit 10 having the above shape will be described. FIG. 4 is a mold 50 of the bracket unit 10. It is a cutting view at the position corresponding to line II-II of FIG.

As shown in FIG. 4, the mold 50 is composed of a cavity-side mold 60 and a core-side mold 70. The cavity-side mold 60 and the core-side mold 70 are arranged so as to face each other and are molded. In the molded state, a molding space MS1 corresponding to the shape of the bracket unit 10 is defined inside the mold 50. A resin member heated to a predetermined melting temperature is injected into the molding space MS1, and the bracket unit 10 is molded.

A convex portion 71 corresponding to the narrow space SR1 is provided on the facing surface (molding surface) of the core side mold 70. In the present embodiment, the surface 71a forming a part of the convex portion 71 and the surface 60a forming a part of the molding surface of the cavity side mold 60 are partially joined. The joint portion 51 between the two forms an opening 42 in the bracket unit 10 in a so-called cut-out shape.

The mold 50 is provided with a cooling circuit 80 for cooling and solidifying the injected resin member. The cooling circuit 80 is configured to allow a cooling fluid such as water to flow through the cooling holes provided in the cavity-side mold 60 and the core-side mold 70, and fills the molding space MS1 by cooling the mold 50. The resin member is indirectly cooled and solidified. The cooling circuit 80 is appropriately provided so as to make the temperature distribution of the molding surfaces of the cavity-side mold 60 and the core-side mold 70 uniform.

(Action effect)
The operation and effect of the present embodiment in which the bracket unit 10 is provided with the opening 42 will be described with reference to FIG. FIG. 5 (A) shows, as a conventional example, the temperature distribution of the mold 950 of a molded product having no opening in the partition wall that is continuously folded back from the reflector, and FIG. 5 (B) shows the temperature distribution of the present embodiment. The temperature distribution of the mold 50 of the bracket unit 10 is shown.

As shown in FIG. 5A, the mold 950 is composed of a cavity-side mold 960 and a core-side mold 970. The core side mold 970 is provided with a convex portion 971 corresponding to a narrow space formed between the reflector portion and the partition wall continuous thereto. Since the convex portion 971 does not have a sufficient thickness and width to provide a cooling hole and does not have a sufficient space for arranging the cooling circuit 80 in the vicinity, the cooling circuit 80 cannot be provided. When the melted resin member is injected, the convex portion 971 becomes extremely hot, surrounded by the high temperature resin member. Since the cooling circuit 80 cannot be provided on the convex portion 971, the temperature of the mold 950 cannot be lowered, and sink marks (streak patterns) are generated on the molded product due to overheating. Since a narrow space is formed near the back surface of the reflector, if a sink mark is generated on the reflector, a problem occurs in the light distribution. In order to solve this, in the present embodiment, the bracket unit 10 is provided with an opening 42.

As shown in FIG. 5B, since the reflector 22 of the bracket unit 10 and the partition wall 41a are provided continuously and very close to each other, the core side corresponding to the narrow space SR1 formed between them. The convex portion 71 of the mold 70 also has a very fine shape. Therefore, as in the conventional product, the convex portion 71 does not have a sufficient thickness and width to provide a cooling hole, and the cooling circuit 80 cannot be provided.

However, unlike the conventional mold 950, the mold 50 is provided with a joint 51 in order to form an opening 42 in the molded product. Since the convex portion 71 of the cavity side mold 60 and the core side mold 70 are in direct contact with each other at the joint portion 51, the heat of the convex portion 71 is transferred to the core side mold 70 (see the white arrow in the figure). .. Since the mold 50 is made of a metal member, the thermal conductivity is high, and the convex portion 71 of the core side mold 70 is joined by the cooling circuit 80 of the cavity side mold 60 arranged near the joint portion 51. It is cooled via 51.

As a result, the temperature of the convex portion 71 is lowered, and the temperature of the entire mold 50 is lowered and kept uniform, so that overheating does not occur and the occurrence of sink marks on the reflector 22 can be suppressed. The reflective surface 22a of the reflector 22 is subjected to metal deposition after injection molding.

The convex portion 71 has a tapered shape reflecting the shape of the reflector 22, and heat is trapped toward the tip thereof (see FIG. 5A). Therefore, the opening 42 is provided near the boundary folded back from the reflector 22. The cooling effect is high, which is preferable.

Further, it is necessary to wait for the resin member to be cooled and completely solidified before opening the mold. However, since the time required for cooling the melted resin member occupies a large proportion in the molding cycle, the conventional product is a mold. Since the heat of the convex portion 71 of the 950 is sufficiently lowered, the molding time is long and the productivity is low. By providing the opening 42 in the bracket unit 10, that is, by providing the joint 51 in the mold 50 for molding the bracket unit 10, the cooling rate of the mold 50 is increased, the molding time is shortened, and the productivity is shortened. Has improved.

(Second Embodiment)
Next, the second embodiment will be described. FIG. 6 is a cross-sectional view of a vehicle headlight 101 provided with a bracket unit 110, which is an injection-molded product according to the second embodiment. FIG. 7 is a partial perspective view of the bracket unit 110. In FIG. 7, similarly to FIG. 3, the bracket unit 110 is cut out with a predetermined width centered on the line II-II of FIG. 7 (A) is a rear upper perspective view, and FIG. 7 (B) is a front lower perspective view. The same reference numerals are given to the configurations showing the same configurations as those of the first embodiment, and the description thereof will be omitted.

The vehicle headlight 101 has the same configuration as the vehicle headlight 1 except that the form of the bracket unit 110 is different.

The bracket unit 110 includes a partition wall 141a that is continuously folded back from the lower end of the reflector 22 that opens toward the front. The partition wall 141a is configured as a vertical wall that defines the light room RH.

Since the reflector 22 and the partition wall 141a are provided very close to each other, a narrow space SR2 is formed between them.

Here, as in the first embodiment, the partition wall 141a is formed with an opening 142 communicating with the narrow space SR2, but unlike the first embodiment, the partition wall 141a is provided with a stepped portion. Therefore, the opening 142 is configured as a through hole provided in the flat partition wall 141a.

(Mold of the second embodiment: slide mold)
A method of molding the bracket unit 110 having the above shape will be described. FIG. 8 shows the mold 150 of the bracket unit 110.

As shown in FIG. 8, the mold 150 is composed of a cavity-side mold 160 having a slide member 161 and a core-side mold 170. The slide member 161 is provided as a nest of the cavity-side mold 160, and is configured to be slidable in the direction of the arrow DR1 (vertical direction) with respect to the cavity-side mold 160 which is the main body. The slide member 161 is provided in the bracket unit 110 for forming the opening 142.

Further, a convex portion 171 corresponding to the narrow space SR2 is provided on the molding surface of the core side mold 170.

When the cavity-side mold 160 and the core-side mold 170 are molded, the slide member 161 moves upward and is held in a state where the tip portion is in contact with the convex portion 171 of the core-side mold 170. NS. A molding space MS2 corresponding to the shape of the bracket unit 110 is defined inside the mold 150, and a resin member heated to a predetermined melting temperature is injected into the molding space MS2, and the bracket unit 110 is molded. NS.

As described above, the convex portion 171 corresponding to the narrow space SR2 is surrounded by the molding space MS2 into which the resin member heated to the melting temperature is poured, and has a structure in which heat is easily trapped, but has a tapered elongated shape. Therefore, the cooling circuit 80 cannot be provided.

In the present embodiment, the slide member 161 is brought into contact with the convex portion 171 using a slide mold, so that the heat of the convex portion 171 is transferred from the contact portion 172 (direction of the white arrow in the drawing). , The temperature of the convex portion 171 is lowered. The slide member 161 and the cavity-side mold 160 are made of a metal member, and the convex portion 171 uses the cooling circuit 80 of the cavity-side mold 160 arranged near the slide member 161 and the contact portion 172 to provide the slide member 161. Cooled through.

After the mold 150 has been sufficiently cooled, the slide member 161 moves downward to separate from the convex portion 171 and lowers to a position where it does not come into contact with the resin member. The bracket unit 110) is taken out.

When the opening 142 can be provided large, such as when the resin molded product is large, the slide member 161 may be provided with the cooling circuit 80. Further, the bracket unit 110 may be provided with a plurality of openings 142, and the mold 150 may be provided with a plurality of slide members 161 to enhance the cooling effect.

In the present embodiment, a reflector having a concave shape on the back surface and a partition wall of a lamp chamber that is continuously folded back to the back surface is used as a resin molded product, but an extension reflector having the same structure is used. The present invention can also be applied to integrally molded products such as the bracket member and the bracket member thereof, and the parabolic reflector and the bracket member thereof.

A design portion having a predetermined shape such as a reflector and constituting a required appearance or function must prevent the occurrence of sink marks and does not provide an opening. By providing an opening in a non-design part that is continuously folded back from the peripheral edge of the design part, for example, a bracket member or a standing wall, which is a non-design part that does not constitute the design part, a sink mark is generated in the design part. Can be suppressed.

(Modification example)
The opening for heat radiation of the molding die provided in the non-designed portion of the integrally molded product having the above configuration is preferably a non-visible portion that is difficult for the user to see or a non-visible portion that is blindfolded by a blindfold material. As an example, FIG. 9 shows the relationship between the mounting location of the vehicle lamps LP and LP'and the line of sight of the user, and this will be described.

The vehicle lamp LP is mounted on the back surface of the vehicle V, and a reflector unit 90 in which the parabolic reflector 91 and its bracket member 92 are integrally molded is provided in the lighting chamber thereof. Similar to the above embodiment, the bracket member 92 of the reflector unit 90 is formed by being folded back from the peripheral edge of the parabolic reflector 91, and the bracket member 92 is formed with an opening 93.

The vehicle lamp LP is mounted on the upper part of the back surface of the vehicle V (for example, a high mount stop lamp), and the bracket member 92 is configured on the upper part of the parabolic reflector 91. Even if the user confirms this by facing the vehicle lamp LP while the vehicle lamp LP is mounted on the vehicle V, the opening 93 provided in the bracket member 92 is hidden by the parabolic reflector 91. It is not visible.

Further, when the vehicle lamp LP'having the same configuration as the vehicle lamp LP is mounted at a relatively low position of the vehicle V (for example, a back lamp), contrary to the previous case, the lower part of the parabolic reflector 91' By providing the bracket member 92'and forming the opening 93' in the bracket member 92', the opening 93'can be shielded by the parabolic reflector 91'.

In this way, by providing the opening in a place where it is difficult for the user to see the molded product from the front in the normal use state, the influence of forming the opening on the appearance can be minimized. ..

The preferred embodiments and modifications of the present invention have been described above, but the above-described embodiments are examples of the present invention, and these can be combined based on the knowledge of those skilled in the art. Included in the scope of the invention.

10, 110: Bracket unit 22: Reflector 22a: Reflective surface 41a, 141a: Partition 42, 142: Opening 42a, 42b, 42c, 42d: Side 43: Step portion RH, RL: Light chamber SR1, SR2: Narrow space

Claims (8)

It is provided with a design portion that has a predetermined shape recessed on the back surface and constitutes a required appearance or function, and is continuously folded back from the peripheral edge of the design portion so as to be adjacent to the design portion across a narrow space. The design portion is provided with an opening that communicates with the narrow space.
An injection-molded product characterized by this. The outer shape of the opening is a substantially rectangular shape having two opposite sides.
The opening is formed in a stepped portion of the non-designed portion so that the thickness directions of the two opposing sides are offset in opposite directions.
The injection-molded article according to claim 1. The opening is formed in the vicinity of the boundary with the design portion, which is folded back from the design portion.
The injection-molded article according to claim 1 or 2, wherein the injection-molded article is characterized by the above. The opening is formed in a difficult-to-see portion that is shielded by the design portion or a non-visible portion that is blindfolded by a blindfold material when the design portion is viewed from the front.
The injection-molded article according to any one of claims 1 to 3. The opening is formed in a standing wall portion of a housing that is continuously formed from the design portion and is open to the front.
The injection-molded article according to any one of claims 1 to 4. The design portion and the non-design portion are configured to be close to each other toward the folded-back portion, which is a boundary.
The injection-molded article according to any one of claims 1 to 5. The design portion is a first lighting chamber having an open front surface from which the irradiation light of the housed first light source is emitted.
The non-design portion is a second lamp chamber having a surface that is continuously folded back from the peripheral edge of the first lamp chamber as a vertical wall and having an open front surface from which the irradiation light of the housed second light source is emitted. The injection-molded article according to any one of claims 1 to 6, wherein the two light chambers are molded in close proximity to each other with the narrow space in between. The design portion is an optical reflector that reflects light toward the front.
The non-designed portion is a bracket member or a standing wall forming a light chamber which is continuously folded back from the end portion of the optical reflector to be erected.
The injection-molded article according to any one of claims 1 to 6, wherein the injection-molded article is characterized by the above.

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