JP2004063305A - Vehicular lamp and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lamp in which the gap with the lens is eliminated and appearance of the shading plate fitting part is improved by fitting a shading plate on the lens side, and the fitting process is made simple and its manufacturing method. <P>SOLUTION: The shading plate 40, which covers the colored lens part 301 of red belt-shape and prevents transmission of light from the inner face of the lens 30 to the colored lens part 301, is fitted to the lens 30 by inserting a protrusion 310, which is provided to the lens 30 so as to protrude on the inner face 31 side on the outside of the opening part 22 of the housing 20, into the fitting hole 410 of the fitting part 41 provided at both ends of the shading plate 40. The protrusion 310 is used concurrently as a heater 60 for carrying out heat adhesion of the housing 20 and the lens 30, and using the heater, the protrusion 310 is depressed and crushed and the shading plate 40 is fitted to the lens 30. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicular lamp and a method of manufacturing the same, and in particular, includes a housing and a lens covering an opening of the housing, wherein the lens covers a part of the opening and the entirety of the opening or the colored lens. A vehicular lamp including a colorless lens portion that covers only the portion not covered by the portion, and a light shielding plate that covers the colored lens portion and that prevents light from being transmitted to the colored lens portion on the inner surface side of the lens. And a method for manufacturing the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been a rear combination lamp of a vehicle in which a plurality of types of lamps such as a fog lamp, a brake lamp, a backup lamp, and a turn signal lamp are integrated.
FIG. 7 shows an example of such a rear combination lamp. In this example, the rear combination lamp is divided into a part attached to the back door and a part attached to the body side, and the fog lamp F, the backup lamp E, and the clearance lamp C are incorporated in the part on the back door side. A brake lamp B and a turn signal lamp D are incorporated in the body side portion.
The rear door side and the body side of the rear combination lamp have housings in which recesses corresponding to various lamps are formed, lenses covering openings of the recesses, bulbs disposed in the recesses, and lenses, respectively. , And a dummy portion formed substantially on the same plane as each lens.
[0003]
The dummy portion A consisting of only dummy lenses is dark red, and the lenses of the brake lamp B and the clearance lamp C are red.
Also, the lens of the turn signal lamp D and the lens of the backup lamp E are mostly colorless, but the entire rear combination lamp including the dummy part A is reduced so as to reduce discomfort due to the difference in color from other parts. A dark red stripe portion V is provided at the center of the lenses of the turn signal lamp D and the backup lamp E in the vertical direction so as to give a reddish appearance.
Although the fog lamp F lens is mostly red, a dark red stripe portion V that is continuous with the backup lamp E and the stripe portion V of the turn signal lamp D is designed at the center of the fog lamp F lens in the vertical direction. Is provided.
[0004]
As shown in FIG. 8, the stripe portion V is formed by laminating a dark red colored lens portion 9301 on a colorless lens portion 9302 by two-color molding.
In addition, Japanese laws and regulations stipulate that the color of the backup lamp E is white when lit, and the color of the turn signal lamp D is orange when lit, so that the light emitted from the bulb L is colorless. A light-shielding plate 940 is provided on the back side of the stripe portion V so as not to transmit the dark red stripe portion V laminated on the lens portion 9302.
The turn signal lamp D is colored orange by coloring the bulb L orange or by providing an orange cover to cover the bulb L.
[0005]
A conventional mounting structure of the light shielding plate 940 will be described. Since the mounting structure of the light shielding plate 940 in the turn signal lamp D and the backup lamp E is the same, only the mounting structure of the light shielding plate 940 in the backup lamp E will be representatively described.
As shown in FIG. 9, engagement holes 923 are formed near the left and right edges of the opening 922 of the backup lamp E recess 921 formed in the housing 920. At both ends of the light-shielding plate 940, mounting legs 941 having claws 9410 are provided.
The light shielding plate 940 is attached to the housing 920 by inserting the attachment leg 941 into the engagement hole 923 and engaging the claw portion 9410 with the opening edge of the engagement hole 923.
Then, heat is welded around the housing 920 and at the end of the colorless lens portion 9302, and the heat-sealed portion 937 is sealed to form a rear combination lamp.
[0006]
[Problems to be solved by the invention]
However, since the engaging hole 923 of the housing 920 to which the light-shielding plate 940 is attached is formed in a wall forming the opening 922 in a direction perpendicular to the optical axis, a drilling mechanism substantially perpendicular to the molding direction of the housing 920 is provided. A problem has arisen that the mold must be provided in the mold, and the mold becomes complicated.
In addition, since there is a gap between the mounting portion of the light shielding plate 940 to the housing 920 and the colorless lens portion 9302, the mounting portion can be visually recognized from the outside of the colorless lens portion 9302 through the colorless lens portion 9302, and the rear combination lamp can be visually recognized. There was also a problem that the appearance was spoiled.
For this reason, it is necessary to adjust a contact portion between the molding die and the mounting leg 941 of the light shielding plate 940, and it has been necessary to perform tuning for a long time.
[0007]
In view of the above, an object of the present invention is to provide a vehicular lamp in which the appearance of a light shielding plate mounting portion is improved and the mounting process is simplified, and a method of manufacturing the same.
[0008]
[Means for Solving the Problems]
The vehicle lamp according to claim 1 of the present invention includes a housing, a lens covering an opening of the housing, the lens includes a colored lens portion covering a part of the opening, and the entire opening. Or a colorless lens portion that covers only a portion that is not covered by the colored lens portion, and a light-shielding portion that covers the colored lens portion and blocks transmission of light rays to the colored lens portion on the inner surface side of the lens. In a vehicle lamp provided with a plate, the lens is provided with a projection protruding from an inner surface thereof, and the projection is inserted into a mounting hole provided in the light shielding plate, and the projection is heated and crushed. Wherein the light shielding plate is attached to the lens.
Therefore, since the light-shielding plate is attached to the lens, there is no need to provide a hole or the like for attaching the light-shielding plate to the housing, and the structure of the housing mold can be simplified.
[0009]
Also, in the vehicle lamp according to claim 2 of the present invention, the light shielding plate is formed with a mounting portion projecting laterally from a periphery of the opening, and the mounting hole of the light shielding plate is It is characterized in that it is provided on the mounting portion.
Therefore, since the mounting portion of the light-shielding plate is located outside the light irradiation range, the mounting portion is not irradiated from the inside of the lens, so that light does not leak from the mounting hole and the appearance of the lamp is not impaired. Can be.
[0010]
In addition, a method for manufacturing a vehicle lamp according to claim 3 according to the present invention includes a housing and a lens that covers an opening of the housing, wherein the lens includes a colored lens portion that covers a part of the opening. A colorless lens portion that covers only the entirety of the opening or only the portion that is not covered with the colored lens portion, and the inner surface side of the lens covers the colored lens portion and transmits light to the colored lens portion. In a method for manufacturing a vehicle lamp provided with a light-shielding plate for preventing transmission, a first step of arranging the light-shielding plate at a position where the lens is attached, and heating a welded portion between the lens and the housing by a heater. At the same time as softening or melting, a second step of thermally caulking the lens and the light-shielding plate with a part of the heater, and pressing the welded portion of the lens and the housing to each other. Characterized in that it comprises a third step of wearing the.
Therefore, since a heat caulking process of the light shielding plate to the lens can be incorporated into the welding process of the lens and the housing, the heater can be shared, thereby reducing the equipment cost and simplifying the assembly process of the vehicle lamp. be able to.
[0011]
Also, in the method for manufacturing a vehicle lamp according to claim 4 according to the present invention, in the first step, a protrusion protruding from an inner surface of the lens is inserted into a mounting hole provided in the light shielding plate, In the second step, the tip of the projection is softened or melted by a part of the heater and crushed to perform thermal caulking between the lens and the light shielding plate.
Therefore, the light-shielding plate can be easily attached to the lens, and the assembly cost can be reduced.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, one embodiment of a vehicle lamp and a method for manufacturing the same according to the present invention will be described below with reference to the drawings. The vehicle lamp and the method of manufacturing the same according to the present embodiment are applied to a rear combination lamp of a 1-box vehicle.
Here, FIG. 1 is a plan sectional view of a backup lamp portion of the vehicle lamp, and FIG. 2 is a vertical sectional view thereof.
[0013]
(Constitution)
The configuration of the vehicle lamp (rear combination lamp) will be described. The vehicle lamp 10 has the same appearance as the conventional rear combination lamp shown in FIG. 7, and the combination of colors of each lens is the same as the conventional one.
However, it is arranged on the back side of the stripe portion V so that light emitted from the bulb L does not pass through the stripe portion V in which the dark red colored lens portion 301 is laminated on the colorless lens portion 302 by two-color molding. Since the mounting structure of the light shielding plate 40 is different, the following description will be focused on this mounting structure using the backup lamp E as an example.
As shown in FIG. 1, the backup lamp E includes a housing 20 having a concave portion 21 with a bulb L attached to the bottom, and a lens 30 that covers an opening 22 of the housing 20. The lens 30 includes a colorless lens portion 302 and a colored lens portion 301. The colorless lens portion 302 covers the opening 22, and a part of the colorless lens portion 302 has a band-shaped concave portion 320 (stripe portion V) substantially at the center in the vertical direction of the opening portion 22 of the housing 20, as shown in FIG. ) Is formed, and a dark red colored lens portion 301 is formed by two-color molding so as to fill the concave portion 320.
[0014]
In the present embodiment, a band-shaped concave portion 320 is formed in a part of the colorless lens portion 302 covering the entire opening portion 22, and a dark red colored lens portion 301 is formed in the concave portion 320 by two-color molding. Although shown, a structure in which a part of the opening 22 is covered with the colored lens portion 301 and only the portion not covered with the colored lens portion 301 is covered with the colorless lens portion 302 may be adopted.
Since the colored lens portion 301 is within the irradiation range of the bulb L, the inner surface of the lens 30 between the central colored lens portion 301 and the bulb L is positioned so that the light beam of the bulb L does not hit the colored lens portion 301. The light-shielding plate 40 is attached to.
[0015]
As shown in FIG. 4, the light-shielding plate 40 has a strip-shaped central band portion 42 having substantially the same width and length as the colored lens portion 301, and both ends of the band portion 42 are stepped in a Z-shape. And a mounting hole 410 is provided in the mounting portion 41.
The band portion 42 is provided with upper and lower flanges 43 to form a U-shaped cross section, thereby improving the rigidity of the light shielding plate 40 and the light shielding range. The light shielding plate 40 may be made of synthetic resin or metal.
[0016]
On the other hand, as shown in FIG. A projection 310 protruding toward 20 is formed.
Then, the mounting hole 410 of the light shielding plate 40 is inserted into the projection 310, and the projection is softened or melted by the heater 60 described later, and is crushed to fix the light shielding plate 40 to the colorless lens portion 302.
The lens 30 to which the light-shielding plate 40 is fixed has its outer peripheral portion 33 adhered to the housing 20 by heat welding, which will be described later, and the housing 20, the lens 30, the bulb L and the like constitute the vehicle lamp 10. .
[0017]
(Action)
Next, a method of manufacturing the vehicle lamp 10 using the housing 20, the lens 30, and the light shielding plate 40 configured as described above will be described.
First, jigs 70 and 80 for heating the molded housing 20 and the lens 30 by the heater 60 are prepared, and as shown in FIG. The light-shielding plate 40 is placed at the mounting position of the lens 30 by inserting the mounting hole 410 of the light-shielding plate 40 into the protrusion 310 described above. (First step)
On the other hand, the housing 20 is set on the upper jig 80 with its opening 22 facing downward, and the heater 60 is inserted between the lower jig 70 and the upper jig 80 to heat the heater 60.
[0018]
The heater 60 has a portion 61 facing the flange portion 25 of the housing 20 and the outer peripheral portion 33 of the lens 30, and a portion 62 facing a projection 310 projecting from the mounting hole 410 of the light shielding plate 40. Therefore, when the heater 60 is heated, the flange portion 25, the outer peripheral portion 33, and the projection 310 are softened or melted.
At the same time as the flange portion 25, the outer peripheral portion 33 and the projection 310 are softened or melted, as shown in FIG. 6, the heater 60 is lowered so that the portion 62 facing the projection 310 comes into contact with the projection 310 and is pressed downward as it is. .
The protrusion 310 is already softened or melted due to heating by the heater 60, so that the protrusion 310 is easily crushed and spreads over the mounting portion 41 of the light shielding plate 40 in a T-shaped cross section as shown in detail in FIG. The plate 40 is caulked to the lens 30. (2nd process)
[0019]
Thereafter, the heater 60 is temporarily removed from between the lower jig 70 and the upper jig 80, and the upper jig 80 approaches the lower jig 70. Then, since the flange portion 25 around the housing 20 and the outer peripheral portion 33 of the lens 30 have already been softened or melted, they come into contact with each other, and the flange portion 25 provided on the flange portion 24 of the housing 20 becomes a heat welding portion 27. Thus, the outer peripheral portion 33 of the lens 30 becomes a heat-welded portion 37 and is heat-welded by the pressing force of the upper jig 80 as shown in detail in FIG. (3rd step)
Thereafter, after the lower jig 70 and the upper jig 80 are cooled, when they are opened, the housing 20 detached from the upper jig 80 remains on the lower jig 70 integrally with the lens 30. , The vehicle lamp 10 is completed.
[0020]
In this manner, the light-shielding plates 40 that cover the red belt-shaped colored lens portion 301 and block the transmission of light from the inner surface of the lens 30 to the colored lens portion 301 are attached to the mounting portions 41 provided at both ends of the light-shielded plate 40. A projection 310 is inserted into the hole 410 at a position outside the opening 22 of the housing 20 so as to project toward the inner surface 31 of the lens 30, and the projection 310 is thermally welded to the housing 20 and the lens 30. Heater 60 is also used, and the heater 60 is attached to the lens 30 by being softened and crushed, so that the gap between the light-shielding plate mounting portion and the lens is eliminated, and the appearance of the vehicle lamp 10 is improved, In addition, the facility cost can be reduced by simplifying the molding die of the housing 20 and simplifying the mounting process of the light shielding plate 40.
[0021]
Note that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present invention.
For example, in the above-described embodiment, the configuration in which the light-shielding plate is attached to the backup lamp has been described. However, the present invention is not limited to this.
[0022]
【The invention's effect】
According to the present invention, the lens is provided with a projection protruding from the inner surface side of the lens at a position lateral to the opening of the housing, the projection is inserted into a mounting hole provided in the light shielding plate, and the projection is crushed to crush the light. Since the plate is a vehicle lamp mounted on the inner surface of the lens, light does not leak from the mounting hole of the light-shielding plate, so that it is possible to provide a good-looking vehicle lamp in which the mounting portion is inconspicuous. Is placed at the mounting position of the lens, and then the welded portion between the lens and the housing is heated by a heater to soften or melt, and at the same time, the lens and the light shielding plate are thermally caulked by a part of the heater. The vehicle lamp is manufactured by pressing the welded part of the housing and welding the two parts together, so the structure of the mold for the housing can be simplified by attaching the light-shielding plate to the inner surface of the lens. Reduction can, and has made it possible to inexpensively equipment by also serves as a heater for heating the weld portion of the lens and the housing crushing soften the projection.
[Brief description of the drawings]
FIG. 1 is a plan sectional view of a backup lamp portion of a vehicle lamp according to one embodiment of the present invention.
FIG. 2 is a vertical sectional view of a backup lamp portion of the vehicle lamp according to one embodiment of the present invention.
FIG. 3 is an enlarged view of a mounting portion of a housing, a lens, and a light shielding plate of a vehicle lamp according to an embodiment of the present invention.
FIG. 4 is a partial perspective view of a light shielding plate used for a vehicle lamp according to one embodiment of the present invention.
FIG. 5 is a plan sectional view of a jig and a heater used in the method for manufacturing a vehicle lamp according to one embodiment of the present invention.
FIG. 6 is a plan sectional view of attaching a light-shielding plate to a lens by a heater used in a method for manufacturing a vehicle lamp according to one embodiment of the present invention.
FIG. 7 is a perspective view showing an example of a rear combination lamp of the vehicle.
FIG. 8 is a vertical sectional view of a backup lamp portion of a conventional vehicle lamp.
FIG. 9 is a plan sectional view of a backup lamp portion of a conventional vehicle lamp.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vehicle lamp 20 Housing 22 Opening 30 Lens 301 Colored lens 302 Colorless lens 310 Projection 40 Shielding plate 410 Mounting hole 60 Heater 70 Lower jig 80 Upper jig

Claims (4)

A housing, and a lens covering the opening of the housing, the lens being a colored lens portion covering a part of the opening, and a colorless covering the whole of the opening or only a portion not covered by the colored lens portion. A lens for a vehicle, comprising: a lens unit; and a light shielding plate that covers the colored lens unit and that prevents light from transmitting to the colored lens unit on the inner surface side of the lens.
Providing the lens with a protrusion protruding from the inner surface thereof, inserting the protrusion into a mounting hole provided in the light-shielding plate, heating the protrusion and crushing the protrusion to attach the light-shielding plate to the lens. Characteristic vehicle lamp. The vehicle lamp according to claim 1,
A vehicle lamp, wherein the light shielding plate has a mounting portion projecting laterally from a periphery of the opening, and a mounting hole of the light shielding plate is provided in the mounting portion. A housing, and a lens covering the opening of the housing, the lens being a colored lens portion covering a part of the opening, and a colorless covering the whole of the opening or only a portion not covered by the colored lens portion. A method for manufacturing a vehicle lamp, comprising: a lens portion; and a light shielding plate that covers the colored lens portion and that prevents light from transmitting to the colored lens portion on the inner surface side of the lens.
A first step of arranging the light-shielding plate at a position where the lens is attached;
A second step of heating the welded portion of the lens and the housing with a heater to soften or melt the same, and at the same time, thermally caulking the lens and the light shielding plate by a part of the heater;
A third step of pressing the welded portion of the lens and the housing to weld the two to each other and welding the two. The method for manufacturing a vehicle lamp according to claim 3,
In the first step, a protrusion protruding from an inner surface of the lens is inserted into a mounting hole provided in the light shielding plate,
In the second step, the tip of the projection is heated and softened or melted by a part of the heater to be crushed while being crushed, thereby thermally caulking the lens and the light shielding plate. Method.

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