JP5459760B2 - Vehicle lamp - Google Patents

Description

  The present invention comprises a resin-made reflector having a bowl shape that reflects light from the light source toward the irradiation direction in a circular shape when viewed from the line of sight along the optical axis of the light source. It is related with the lamp | ramp for vehicles formed by these.

  Conventionally, the above-described vehicle lamp is disclosed in Patent Document 1 below. According to this publication, the vehicle lamp has a built-in light source, has a circular shape when viewed from the line of sight along the optical axis of the light source, and emits light from the light source toward the irradiation direction. A reflector made of resin having a bowl shape to be reflected, and a lens that covers the reflector from the front in the irradiation direction and transmits the light in the irradiation direction, and the reflector is formed by injection molding.

  Conventionally, the reflector has the following as a more specific one. That is, at the time of injection molding of the reflector, the solidified portion in the gate solidified in the gate extends from the radially outer region of the reflector to the outer peripheral portion of the reflector, and the extended portion is integrated with the outer peripheral portion. Is bound to. Then, in the front view, the solidified portion in the gate is rotatable so as to follow a line that linearly connects each intersection of the outer peripheral edge of the reflector and each outer edge in the width direction of the solidified portion in the gate. It cut | disconnects by using a cutter blade, and, thereby, the resin upstream side part at the time of the injection molding of the said in-gate solidification part is removed, and the said reflector is formed.

Japanese Patent Laid-Open No. 10-175232

  By the way, in the above-mentioned conventional technology, the reflector has a circular shape when viewed from the front, that is, the outer peripheral edge thereof has a substantially circular shape as a whole. The straight portion extending linearly by cutting the solidified portion in the gate. For this reason, there is a possibility that this straight line portion may give a visual discomfort to a viewer such as a user of the vehicle. Therefore, the lamp having the reflector having the above-described configuration tends to be hindered from being improved in appearance.

  Therefore, when cutting the in-gate solidified portion, it can be considered that the cut portion is formed in an arc shape so that the cut portion smoothly continues to the outer peripheral edge of the reflector. However, this complicates the reflector structure, that is, the lamp configuration. Moreover, since the above-described cutting operation of the in-gate solidified portion into the arc shape is complicated, there is a problem that the forming operation of the lamp becomes complicated.

  Further, it is conceivable that an extension is formed by extending a part of the reflector or lens, and the linear portion is covered from the front by the extension. In this way, it is considered that the straight portion is difficult to see for the viewer, so that the appearance of the lamp can be improved. However, in this case, the configuration of the lamp becomes complicated and the forming operation becomes complicated because the extension is separately set.

  The present invention has been made paying attention to the above situation, and an object of the present invention is to improve the appearance of the lamp with a simple configuration and an easy forming operation.

The invention of claim 1 incorporates a light source 10, has a circular shape when viewed from the line of sight along the optical axis 9 of the light source 10 (FIG. 1), and is directed from the light source 10 toward the irradiation direction A. A resin-made reflector 8 having a bowl shape that reflects the light 12 is provided, and the in-gate solidified portion 16 at the time of injection molding of the reflector 8 extends from the radially outer region of the reflector 8 to the outer peripheral portion 17 of the reflector 8. The extended portion 18 is integrally coupled to the outer peripheral portion 17, and each outer end in the width direction of the outer peripheral edge of the reflector 8 and the in-gate solidified portion 16 in the front view (FIG. 1). In the vehicle lamp in which the in-gate solidified portion 16 is cut along the line 22 that linearly connects the intersections 20 and 21 with the edges, and the resin upstream side portion 24 of the in-gate solidified portion 16 is removed. ,
A part 18b of the extended portion 18 of the gate internal solidifying portion 16 is integrally coupled to the outer surface 17b on the irradiation direction A side in the outer peripheral portion 17 of the reflector 8, and is viewed with a line of sight toward the radial direction of the reflector 8. (FIG. 4), the vehicle is characterized in that the outer edge of the part 18b of the extension part 18 of the gate internal solidification part 16 has a convex arc shape toward the irradiation direction A. Lamp.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 has a built-in light source, has a circular shape when viewed from the line of sight along the optical axis of the light source, and is made of resin in a bowl shape that reflects light from the light source toward the irradiation direction. The reflector in the gate at the time of injection molding of the reflector extends from the radially outer region of the reflector to the outer periphery of the reflector, and the extension is integrally coupled to the outer periphery. In the front view, the gate solidified portion is cut along a line that linearly connects the intersections of the outer peripheral edge of the reflector and the outer edge in the width direction of the gate solidified portion. In the vehicle lamp from which the resin upstream side portion of the in-gate solidified portion is removed,
A part of the extension part of the in-gate solidified part is integrally coupled to the outer surface on the irradiation direction side in the outer peripheral part of the reflector, and when viewed from the line of sight toward the radial direction of the reflector, The part of the outer edge of the extending portion has a convex arc shape toward the irradiation direction.

  Here, when a viewer such as a vehicle user views the vehicle from the outside of the vehicle, the viewer usually looks from a direction inclined to the optical axis of the light source. Therefore, the part of the outer end edge of the extension portion of the gate solidified portion in the radial direction of the reflector looks like a convex arc shape toward the radially outward direction of the reflector for the viewer. What is necessary is just to attach the said lamp | ramp to the vehicle body side.

  In this way, the part of the outer end edge of the extension portion is more smoothly continuous with the outer peripheral edge of the reflector, which is substantially in the shape of an annulus. It tends to look like an annular shape. Therefore, the appearance of the lamp provided with the reflector is improved in appearance as compared with the conventional technique in which a part of the annular shape is seen as a straight portion.

  Further, the above-described improvement in the appearance of the lamp can be achieved by simply forming the part of the outer surface of the extending portion of the solidified portion in the gate into an arc shape as described above. Therefore, the above-described improvement in the appearance of the lamp can be achieved without providing a separate member such as an extension that covers the part of the extension portion of the in-gate solidified portion. And can be achieved by an easy forming operation.

FIG. 3 is a partially enlarged detail view of FIG. 2. It is a partial front view of a vehicle. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is the IV-IV arrow directional view of FIG. FIG. 4 is a partially enlarged view of FIG. 3. FIG. 6 is a visual view of a viewer in FIG. 5.

  In order to achieve the object of improving the appearance of a lamp with a simple configuration and easy forming operation, the form for carrying out the present invention is as follows. That's right.

  That is, the vehicle lamp has a built-in light source, has a circular shape when viewed from the line of sight along the optical axis of the light source, and is made of resin in a bowl shape that reflects light from the light source toward the irradiation direction. Equipped with a reflector. The in-gate solidified portion at the time of injection molding of the reflector extends from the radially outer region of the reflector to the outer peripheral portion of the reflector, and the extended portion is integrally coupled to the outer peripheral portion. In the front view, the solidified portion in the gate is cut along a line that linearly connects each intersection of the outer peripheral edge of the reflector and each outer edge in the width direction of the solidified portion in the gate, The resin upstream side portion of the in-gate solidified portion is removed.

A part of the extension part of the in-gate solidified part is integrally coupled to the outer surface on the irradiation direction side in the outer peripheral part of the reflector. When viewed from the line of sight in the radial direction of the reflector, the part of the outer edge of the extension part of the in-gate solidified part is formed to have a convex arc shape toward the irradiation direction.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  1-5, the code | symbol 1 is a vehicle illustrated with a motor vehicle, and the arrow Fr has shown the front of the advancing direction of this vehicle 1. In FIG.

  The vehicle 1 is disposed adjacent to the upper side of each end of the bumper 3 in the width direction of the vehicle body 2 and is mounted on the vehicle body 2 side. The headlamp 4 is provided.

  The lamp 4 is attached to the vehicle body 2 side and has a bowl-shaped lamp housing 7 that opens toward the front of the vehicle 1. The lamp housing 7 is disposed inside the lamp housing 7 and supported by the lamp housing 7. A bowl-shaped reflector 8 that opens toward the front, a light source 10 that is built in the reflector 8 and supported by the reflector 8, and that has a light axis 9 extending in the front-rear direction, and the reflector 8 from the front are entirely And a transparent lens 11 whose outer edge is fixed to the outer edge of the lamp housing 7. The lamp housing 7, the reflector 8, and the lens 11 are all made of resin.

  The reflector 8 has a circular shape when viewed from the front (FIGS. 1 and 2) as viewed from the line of sight along the optical axis 9 of the light source 10. The circular shape is not limited to a strict circular shape.

  Further, the reflector 8 reflects the light 12 from the light source 10 toward a desired irradiation direction A to be irradiated by the lamp 4. In this case, silver aluminum vapor deposition is performed on the surface (inner surface) on the irradiation direction A side of the reflector 8. Although not shown in detail, the reflector 8 and the light source 10 are supported so as to be tiltable with respect to the lamp housing 7 and to be fixed at the tilted position. That is, the irradiation direction A of the lamp 4 can be changed in a desired direction by the integral tilting of the reflector 8 and the light source 10.

  The reflector 8 is injection-molded by a known injection molding machine using a thermoplastic or thermosetting resin 14. At the time of this injection molding, the heat-melted resin 14 is extruded by a screw type injection machine, and the resin 14 is injected toward the cavity through a gate formed in a mold. Thereafter, the resin 14 is cooled and solidified by elapse of a predetermined time, or the resin 14 is heated and solidified. And the molded product by this solidification is taken out from the said metal mold | die.

  In this case, the molded product includes the reflector 8 that is solidified in the cavity, and an in-gate solidified portion 16 that is solidified in the gate and formed integrally with the reflector 8. . The in-gate solidified portion 16 extends from the radially outer region of the reflector 8 to the outer peripheral portion 17 of the reflector 8, and the extended portion 18 is integrally coupled to the outer peripheral portion 17.

  Specifically, a part 18a of the extending part 18 is integrally coupled to the outer peripheral surface 17a of the outer peripheral part 17 of the reflector 8, and the other part 18b of the extending part 18 is The outer peripheral portion 17 of the reflector 8 is integrally coupled to the outer surface (front surface) 17b on the irradiation direction A side. In addition, the other part 18b of the said extension part 18 is shown with the satin pattern for convenience of explanation.

  In the front view (FIG. 1), in the vicinity of a line 22 that linearly connects the intersections 20, 21 of the outer peripheral edge of the reflector 8 and the outer edge in the width direction of the in-gate solidified portion 16 Thus, the in-gate solidified portion 16 is cut by the rotary cutter blade 23 along the line 22. As a result, the resin upstream side portion 24 at the time of injection molding of the in-gate solidified portion 16 is removed. The cutting may be by shearing.

When viewed from the line of sight of the reflector 8 in the radial direction (FIG. 4), the outer edge of the other part 18 b of the extension 18 of the in-gate solidified part 16 is convex toward the irradiation direction A. It is formed to have an arc shape.

  During the above-described injection molding of the reflector 8, the resin 14 which is thermally melted is injected into the cavity through the gate from the injection machine. Here, as described above, the reflector 8 has a bowl shape, and a fitting hole into which the light source 10 is fitted is formed at the bottom. For this reason, the projection part of the metal mold | die for forming this insertion hole is protrudingly provided by the said cavity inner surface.

  Therefore, as described above, the resin 14 injected into the cavity through the gate is normally divided into two flows by the protrusions of the mold, as indicated by a one-dot chain line in FIG. These two flows collide with each other at the position opposite to the gate in the radial direction of the reflector 8 and are integrated with each other, so that the resin 14 is filled in the cavity.

  By the way, in the above case, when two flows collide and are integrated at a position opposite to the gate, the surface on the irradiation direction A side of the reflector 8 in the collision portion is between the two flows. A thin streak-like boundary line called a weld 27 may be formed. In addition, a slight but granular projection 28 may be formed on the surface of the reflector 8 in the irradiation direction A side of the reflector 8 due to the bubbles sandwiched between the two flows. And when the said weld 27 and the processus | protrusion 28 arise, the external appearance of the said reflector 8 is inhibited. Moreover, when silver aluminum vapor deposition is performed on the surface of the reflector 8 on the irradiation direction A side, the weld 27 and the protrusion 28 become more conspicuous, and the appearance may be further hindered.

  Here, when a viewer 31 such as a user of the vehicle 1 views the vehicle 1 from the outside of the vehicle, particularly when the vehicle 1 is low like a passenger car, the viewer 31 usually has a lamp for the vehicle 1. 4 will be seen diagonally downward. Therefore, the lamp 4 is attached to the vehicle body 2 so that the weld 27 and the projection 28 are positioned above the reflector 8 so that the weld 27 and the projection 28 are not easily seen by the viewer 31. In this case, the extended portion 18 of the in-gate solidified portion 16 is located below the reflector 8.

As shown by a solid line in FIG. 5, it is assumed that the viewer 31 looks at the reflector 8 of the lamp 4 attached to the vehicle body 2 as described above obliquely downward. More specifically, it is assumed that the viewer 31 sees the other part 18b of the extended portion 18 of the in-gate solidified portion 16 in the reflector 8 obliquely downward. In this case, the outer edge portion of the other part 18b has a convex arc shape as described above.

  Therefore, as shown by a solid line in FIG. 6, the outer end edge 33 of the other part 18 b of the extending portion 18 of the gate internal solidification portion 16 in the radial direction of the reflector 8 is convex for the viewer 31. It will look like an arc shape. Therefore, the outer edge 33 of the other part 18b is more smoothly continuous with the outer peripheral edge of the reflector 8 which is substantially in the shape of an annulus. It tends to be visible.

  Here, in the conventional technique, the solidified portion in the gate is cut along a straight line. Therefore, when the viewer 31 looks at the cut portion as shown by a one-dot chain line in FIG. 5, the outer peripheral edge of the reflector. As shown by the alternate long and short dash line in FIG. However, according to the above-described configuration, as described above, the outer peripheral edge of the reflector 8 and the outer edge 33 of the other part 18b of the extending portion 18 tend to look like an annular shape as a whole. The appearance of the lamp 4 provided with the reflector 8 is improved in appearance.

  Further, the above-described improvement in the appearance of the lamp 4 can be achieved by simply forming the outer surface of the other part 18b of the extension part 18 of the in-gate solidified part 16 into an arc shape as described above. Therefore, the above-described improvement in the appearance of the lamp 4 can be achieved without providing a separate member such as an extension that covers the other portion 18b of the extension portion 18 of the in-gate solidifying portion 16 from the front. Improvement of the appearance of the lamp 4 can be achieved with a simple configuration and an easy forming operation.

  Further, as described above, a part 18 a of the extending portion 18 of the in-gate solidified portion 16 is integrally coupled to the outer peripheral surface 17 a of the outer peripheral portion 17 of the reflector 8, and in addition to this, the extending portion 18. The other part 18 b is integrally coupled to the outer surface 17 b on the irradiation direction A side in the outer peripheral portion 17 of the reflector 8. That is, according to this configuration, a gate having a larger cross-sectional area can be set for the cavity in the mold during injection molding.

  Therefore, when the resin 14 is injected into the cavity through the gate in the mold, the pressure loss during the flow of the resin 14 is suppressed to a small level, that is, it is avoided to apply a large external force to the mold. However, since the injection amount and injection speed per unit time of the resin 14 into the cavity can be made appropriate, the required strength of the mold can be kept low, and the occurrence of the weld 27 and the protrusion 28 can be suppressed, Also in this respect, the appearance of the lamp 4 can be further improved.

  Although the above is based on the illustrated example, the vehicle 1 is not limited to an automobile. Further, the lamp 4 may be a rear combination lamp or a fog lamp in an automobile in addition to the head lamp described above. In addition, it is not essential that the extending portion 18 of the in-gate solidified portion 16 be positioned below the reflector 8, and it may be positioned above or on the side of the reflector 8.

  In addition, the reflector 8 has a circular shape in the front view (FIG. 1), but the lamp housing 7 and the lens 11 may have a rectangular shape such as a square. Further, in the front view (FIG. 1), the cutting position of the in-gate solidified portion 16 may be slightly deviated from the line 22 toward the center of the reflector 8 as long as it is in the vicinity of the line 22. .

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 4 Lamp 7 Lamp housing 8 Reflector 9 Optical axis 10 Light source 11 Lens 12 Light 14 Resin 16 Gate solidification part 17 Outer part 17a Outer part 17b Outer part 18 Extension part 18b Part 20 Intersection 21 Intersection 22 Line 24 Resin Upstream side 31 Viewer 33 Outer edge A Irradiation direction

Claims (1)

This reflector has a built-in light source, has a circular shape when viewed from the line of sight along the optical axis of the light source, and has a resin-made reflector with a bowl shape that reflects light from the light source toward the irradiation direction. The solidified portion in the gate at the time of injection molding extends from the radially outer region of the reflector to the outer peripheral portion of the reflector, and this extended portion is integrally coupled to the outer peripheral portion, and in the front view, the The solidified portion in the gate is cut along a line that linearly connects each intersection of the outer peripheral edge of the reflector and each outer edge in the width direction of the solidified portion in the gate. In the vehicle lamp from which the resin upstream side is removed,
A part of the extension part of the in-gate solidified part is integrally coupled to the outer surface on the irradiation direction side in the outer peripheral part of the reflector, and when viewed from the line of sight toward the radial direction of the reflector, A vehicular lamp characterized in that the part of the outer edge portion of the extending portion has a convex arc shape toward the irradiation direction.

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