JP7283076B2 - vehicle lamp - Google Patents

Description

The present invention relates to a vehicle lamp including a lamp housing and a lamp lens.

As such a vehicle lamp, for example, there is one disclosed in Patent Document 1. The vehicle lamp of Patent Document 1 includes a lamp housing and a lamp lens, the lamp housing and the lamp lens are welded to each other to form a lamp chamber, and a molten resin flow control portion is provided on the welding protrusion of the lamp housing. It is something that has been set up. The vehicle lamp of Patent Document 1 prevents air traps (cavities) from occurring in the lamp housing by means of the molten resin flow control section.

JP 2017-4719 A

However, in the vehicular lamp of Patent Document 1, the molten resin flow control portion is formed of a groove portion recessed toward the welding convex portion side. For this reason, in the vehicle lamp of Patent Document 1, when the concave direction of the groove portion of the molten resin flow control portion intersects with the release direction of the lamp housing due to the shape of the lamp housing, the groove portion is concave toward the welding convex portion side. It may not be possible to provide a molten resin flow control section consisting of.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle lamp that can be provided with a flow velocity suppressing portion that prevents air traps from occurring regardless of the shape of the lamp housing.

A vehicle lamp according to the present invention includes a lamp housing and a lamp lens. The lamp housing and the lamp lens are each provided with a welding portion having a welding surface, and the lamp housing and the lamp lens are joined together. are welded to each other at the welding surfaces to form a lamp chamber, and the welded portion of the lamp housing is provided with a flow velocity suppressor formed by removing a part of the corner portion of the outer surface opposite to the inner surface of the lamp housing. is provided.

In the vehicle lamp of the present invention, it is preferable that the flow rate suppressing portion is provided at least in a portion of the welding portion where the vertical direction of the welding surface intersects the release direction of the lamp housing.

In the vehicular lamp of the present invention, it is preferable that the flow rate suppressing portions are provided alternately with the contact surfaces with which the receiving jig contacts during welding, on the surface opposite to the welding surface.

In the vehicle lamp of the present invention, it is preferable that the plate thickness of the welded portion provided with the flow velocity suppressing portion is smaller than the plate thickness of the welded portion not provided with the flow velocity suppressing portion.

The vehicle lamp of the present invention can be provided with a flow velocity suppressing portion that prevents air traps from occurring regardless of the shape of the lamp housing.

FIG. 1 is a front view (viewing the front side from the rear side of a vehicle) showing an embodiment of a vehicle lamp according to the present invention. FIG. 2 is a front view of the lamp housing with the lamp lens removed. FIG. 3 is a cross-sectional view (a cross-sectional view taken along the line III-III in FIG. 1) showing the vehicle lamp. FIG. 4 is a cross-sectional view (cross-sectional view taken along line IV-IV in FIG. 2) showing the lamp housing with the lamp lens removed. FIG. 5 is a partially enlarged perspective view (view from arrow V in FIG. 3) showing the welded portion of the lamp housing and the lamp lens. FIG. 6 is a partially enlarged sectional view showing the welded portion of the lamp housing. FIG. 6A is a partially enlarged cross-sectional view showing a flow velocity suppressing portion having a chamfered shape (C-chamfered shape). FIG. 6B is a partially enlarged cross-sectional view showing a curved (rounded) flow velocity suppressing portion. FIG. 6(C) is a partially enlarged cross-sectional view showing a welded portion in which a flow velocity suppressing portion is not provided. FIG. 7 is a partially enlarged cross-sectional view showing a welded portion of a lamp housing of a general vehicle lamp. FIG. 7A is a partially enlarged cross-sectional view showing a welded portion in which grooves are provided in the vertical direction of the welded surface and in the releasing direction of the lamp housing. FIG. 7B is a partially enlarged cross-sectional view showing a welded portion in which the groove is provided in a direction intersecting the release direction of the lamp housing. FIG. 7C is a partially enlarged cross-sectional view showing a welded portion in which grooves are provided in a direction intersecting the vertical direction of the welded surface.

Hereinafter, one example of an embodiment (example) of a vehicle lamp according to the present invention will be described in detail with reference to the drawings. In this specification, front, rear, top, bottom, left, and right are front, rear, top, bottom, left, and right when the vehicle is equipped with the vehicle lamp according to the present invention. Since the drawings are schematic diagrams showing the vehicle lamp according to the present invention, detailed portions of the vehicle lamp according to the present invention are omitted in the drawings. In addition, hatching is omitted in FIG.

(Explanation of configuration of embodiment)
1 to 6 show an embodiment of a vehicle lamp according to the invention. The configuration of the vehicle lamp according to this embodiment will be described below. In the drawing, reference numeral 1 denotes a vehicle lamp according to this embodiment.

(Description of vehicle lamp 1)
The vehicle lamp 1 is a rear combination lamp in this example. The vehicle lamp 1 is installed on both left and right sides of the rear portion of a vehicle (not shown).

The vehicle lamp 1 of this example is installed on the left side of the rear portion of the vehicle. Further, the vehicle lamp 1 of this example is mounted on the vehicle body on the fixed side with respect to the trunk door (rear hatch, rear door) on the movable side. Further, the planar shape of the vehicle lamp 1 of this example (the shape viewed from the upper side of the vehicle to the lower side (road surface side)), as shown in the cross-sectional view of FIG. It is received and has a shape that wraps around from the rear to the side (left side) of the vehicle and has a thin shape.

The vehicle lamp 1 includes a lamp housing 2, a lamp lens 3, and a light source 4, as shown in FIGS. The lamp housing 2 and the lamp lens 3 are welded together by heat and pressure to form a lamp chamber 10 .

A light source 4 is arranged in the lamp chamber 10 . In addition to the light source 4, the lamp chamber 10 may include, for example, an inner lens, an inner panel, a light guide member and a reflector member (not shown).

(Explanation of lamp housing 2)
The lamp housing 2 is made of, for example, a light-impermeable member (such as an opaque thermoplastic resin member). That is, the lamp housing 2 is molded by injecting molten resin from a gate of a molding die (not shown) into a cavity of the molding die. 4 and 6, symbol "A" indicates the release direction of the lamp housing 2, that is, the direction in which the mold is opened. This release direction A can be determined from the position of the gate of the lamp housing 2 after molding and the position of the parting line.

The lamp housing 2 has a body portion 20 , a vertical wall portion 21 and a welding portion 22 . The body portion 20 and the vertical wall portion 21 have a plate-like cross section. The body portion 20 has a shape that wraps around from the center side of the vehicle (the right side in this example) to the lateral side of the vehicle (the left side in this example) when viewed from above. A circular mounting hole 40 is provided in a portion of the body portion 20 on the center side of the vehicle. The standing wall portion 21 is provided integrally with the main body portion 20 at a portion of the main body portion 20 on the center side of the vehicle.

The welded portion 22 is integrally provided along the entire periphery of the opening of the main body portion 20 and the standing wall portion 21 . The welded portion 22 has a convex cross-sectional shape. The plate thickness of the welded portion 22 (see the diameters D1 and D2 of the inscribed circles in FIGS. 6A, 6B, and 6C) is the same as the plate thickness of the main body portion 20 and the plate thickness of the standing wall portion 21 (see FIGS. 6A, 6B, and 6C). 6 (A), (B), (C) see the diameter D3 of the inscribed circle).

The welding portion 22 has a welding surface 23 . The welding surface 23 is provided on the opening side surface of the welding portion 22 .

The welded portion 22 is provided with the flow velocity suppressing portion 5 . The flow velocity suppressing portion 5 is a part of the corner of the outer side surface 25 opposite to the inner side surface 24 on the side of the lamp chamber 10 (the portion surrounded by the two-dot chain line and the solid line in FIGS. 6A and 6B). ) are removed and formed. The flow velocity suppressing section 5 suppresses the flow velocity of the melted resin.

The flow velocity suppressing portion 5 in this example is a flow velocity suppressing portion 50 having a chamfered shape (C chamfered shape) as shown in FIG. shape).

The flow velocity suppressing portion 5 is formed at least in a portion of the welding portion 22 where the vertical direction of the welding surface 23 (see the solid arrow F in FIGS. 4 and 6) intersects the release direction A of the lamp housing 2. , is provided. The flow velocity suppressing portion 5 in this example is provided in a portion of the welding portion 22 on the lateral side of the vehicle. The vertical direction F of the weld surface 23 is the direction in which pressure is applied when the lamp housing 2 and the lamp lens 3 are welded together, and is hereinafter also referred to as "pressure direction F".

As shown in FIG. 5, the flow velocity suppressing portions 5 are provided alternately with contact surfaces 26 on the surface opposite to the welding surface 23, with which a receiving jig (not shown) contacts during welding. . The dimension B of the flow velocity suppressing portion 5 in this example is 30 mm, and the dimension C of the contact surface 26 is 10 mm.

The plate thickness of the welded portion 22 provided with the flow velocity suppressing portion 5 (see the diameter D1 of the inscribed circle in FIGS. 6A and 6B) is the same as that of the welded portion 22 without the flow velocity suppressing portion 5. (see the diameter D2 of the inscribed circle in FIG. 6(C)).

(Explanation of the inscribed circle of plate thickness)
An inscribed circle having a diameter D1 shown in FIG. 6A, which is the plate thickness of the welded portion 22 provided with the flow velocity suppressing portions 5 and 50, is a circle inscribed with the inner surface 24, the outer surface 25, and the chamfered surface, respectively. be. An inscribed circle having a diameter D1 shown in FIG. 6B, which is the plate thickness of the welded portion 22 provided with the flow velocity suppressing portions 5 and 51, is a circle that inscribes the inner surface 24, the outer surface 25, and the curved surface, respectively. be. The inscribed circle having a diameter D2 shown in FIG. It is an inscribed circle. The inscribed circles having a diameter D3 shown in FIGS. 6A, 6B, and 6C, which are the plate thickness of the main body 20, are circles inscribed on the inner and outer surfaces of the main body 20, respectively.

(Description of lamp lens 3)
The lamp lens 3 is made of, for example, a light-transmitting member (such as a transparent thermoplastic resin member). That is, like the lamp housing 2, the lamp lens 3 is injection molded using a mold (not shown).

The lamp lens 3 has a body portion 30 and a welding portion 31 . The body portion 30 has a plate shape. The body portion 30 has a shape that wraps around from the center side (the right side in this example) of the vehicle to the lateral side (the left side in this example) of the vehicle when viewed from above. An optical element group (prism group) that emits light from the light source 4 to the outside in a light distribution pattern (not shown) having a predetermined lamp function is provided at least on the inner surface of the main body 30 on the lamp chamber 10 side. is provided.

The welding portion 31 is provided integrally with the entire peripheral edge of the opening of the main body portion 30 . The welded portion 31 has a plate-like cross section and a convex cross-sectional shape. The welding portion 31 has a welding surface 32 . The welding surface 32 is provided on the opening side surface of the welding portion 31 .

(Description of Welding Between Lamp Housing 2 and Lamp Lens 3)
First, the contact surface 26 of the lamp housing 2 is brought into contact with the contact surface of the receiving jig. Next, the welding surface 32 of the lamp lens 3 is placed on the welding surface 23 of the lamp housing 2 . Then, the welding surface 23 of the lamp housing 2 and the welding surface 32 of the lamp lens 3 are welded together by heating and pressurizing with an infrared laser welding machine, an ultrasonic welding machine, or a hot plate welding machine.

That is, heat is applied to the welding surface 23 of the lamp housing 2 and the welding surface 32 of the lamp lens 3, and at the same time pressure is applied to the welding surface 23 of the lamp housing 2 and the welding surface 32 of the lamp lens 3. Add from the direction of the solid arrow F in 6. Thereby, the welding surface 23 of the lamp housing 2 and the welding surface 32 of the lamp lens 3 are welded to each other. The welded portions of the welded surfaces 23 and 32 are indicated by thick lines (black portions) in FIGS. The lamp housing 2 and the lamp lens 3 thus welded together by heating and pressurization form a lamp chamber 10 .

(Description of light source 4)
The light source 4 is a bulb type light source in this example. The light source 4 is detachably attached to a mounting hole 40 of the lamp housing 2 via a socket (not shown).

In this example, one light source 4 is arranged inside the lamp chamber 10 , but a plurality of light sources 4 each having a different function may be arranged inside the lamp chamber 10 . Further, the light source 4 may be a self-luminous semiconductor type light emitting element (semiconductor light emitting element) type light source such as LED, OEL or OLED (organic EL), in addition to the bulb type light source.

(Description of the action of the embodiment)
The vehicle lamp 1 according to this embodiment is configured as described above, and the operation thereof will be described below.

The light source 4 is turned on to emit light. Then, the light (not shown) emitted from the light source 4 is transmitted through the body portion 30 of the lamp lens 3 and irradiated to the outside in a light distribution pattern of a predetermined lamp function.

Since the welding surface 23 of the lamp housing 2 and the welding surface 32 of the lamp lens 3 are welded to each other, the interior of the lamp chamber 10 is kept airtight or watertight.

(Description of effects of the embodiment)
The vehicular lamp 1 according to this embodiment has the configuration and operation described above, and the effects thereof will be described below.

In the vehicle lamp 1 according to this embodiment, the flow velocity suppressing portion 5 is formed by removing a part of the corner portion of the outer side surface 25 of the welding portion 22 . As a result, regardless of the shape of the lamp housing 2, the vehicle lamp 1 according to this embodiment can be provided with the flow velocity suppressing portions 5, 50, and 51 that prevent air traps from occurring. As a result, the vehicle lamp 1 according to this embodiment can reliably prevent problems caused by the occurrence of air traps in the lamp housing 2 .

Here, a general vehicle lamp (see the above-mentioned vehicle lamp of Patent Document 1) has lamp housings 200A, 200B, and 200C having shapes as shown in FIGS. Therefore, it may not be possible to provide the recessed groove portion (molten resin flow control portion) 500 on the welding portion 220 side.

For example, as shown in FIG. 7A, in the case of a lamp housing 200A in which the releasing direction A of the lamp housing 200A and the vertical direction F of the welding surface 230 (that is, the pressing direction F) are parallel, the contact A groove 500 can be provided in the surface 260 in the release direction A. As shown in FIG. In this case, since the recessed direction of the groove portion 500 coincides with the pressure direction F, the pressure can be withstood.

However, as shown in FIG. 7B, in the case of the lamp housing 200B in which the releasing direction A of the lamp housing 200B intersects with the vertical direction F of the welding surface 230 (that is, the pressing direction F), the lamp Since the release direction A of the housing 200B and the recess direction of the groove 500 intersect, the contact surface 260 cannot be provided with the groove 500 in the release direction A.

Therefore, as shown in FIG. 7C, in the case of the lamp housing 200C in which the release direction A of the lamp housing 200C intersects with the vertical direction F of the welding surface 230 (that is, the pressing direction F), A groove 500 can be provided in the release direction A on the outer surface 250 . However, in this case, the concave direction of the groove portion 500 intersects with the pressurizing direction F, so it cannot withstand the pressurization.

In FIGS. 7A, 7B, and 7C, reference numeral "200" denotes a main body portion, and reference numeral "240" denotes an inner surface in accordance with the reference numerals of the vehicle lamp 1 according to this embodiment. be.

In contrast, as described above, the vehicle lamp 1 according to this embodiment can be provided with the flow velocity suppressing portions 5, 50, and 51 that prevent the occurrence of air traps regardless of the shape of the lamp housing 2. , can withstand pressure.

Here, the vehicle lamp has a novel design along with the vehicle body design. For example, a vehicle lamp such as a rear combination lamp has a wraparound portion extending from the rear surface to the side surface of the vehicle body, and has a novel design. In such a vehicle lamp such as a rear combination lamp, the lamp housing has a complicated shape.

However, as described above, the vehicle lamp 1 according to this embodiment is provided with the flow velocity suppressing portions 5, 50, and 51 that prevent the occurrence of air traps regardless of the shape of the lamp housing 2, which is complicated by the novel design. and can withstand pressure.

In the vehicle lamp 1 according to this embodiment, a part of the corners of the outer surface 25 of the welded portion 22 is removed to form the flow velocity suppressing portion 5. Therefore, the weight of the lamp housing 2 can be reduced. can.

In the vehicular lamp 1 according to this embodiment, the flow velocity suppressing portion 5 is a portion of the welded portion 22 on the lateral side of the vehicle, at least in the vertical direction F of the welded surface 23 (that is, the pressure direction F). ) intersects the release direction A of the lamp housing 2. As shown in FIG. That is, the vehicle lamp 1 according to this embodiment has an air trap in a portion where the groove 500 cannot be provided in a general vehicle lamp, or where the groove 500 cannot withstand pressure even if the groove 500 is provided. It is possible to provide the flow velocity suppressing portions 5, 50, 51 that prevent the occurrence of , and to withstand pressurization.

In the vehicle lamp 1 according to this embodiment, the flow velocity suppressing portion 5 is provided alternately with the contact surface 26 with which the receiving jig contacts during welding on the surface opposite to the welding surface 23 . . As a result, in the vehicle lamp 1 according to this embodiment, when the lamp housing 2 and the lamp lens 3 are welded together, the abutment surface 26 can receive pressure, so that the corner portion of the outer surface 25 of the welded portion 22 can be pressed. , the lamp housing 2 and the lamp lens 3 can be welded together even when the flow velocity suppressing portion 5 is formed by removing a part of the .

In the vehicle lamp 1 according to this embodiment, the plate thickness of the welded portion 22 provided with the flow velocity suppressing portion 5 (see the diameter D1 of the inscribed circle in FIGS. 6A and 6B) is is smaller than the plate thickness of the welded portion 22 (see the diameter D2 of the inscribed circle in FIG. 6C). As a result, in the vehicle lamp 1 according to this embodiment, the flow velocity of the molten resin can be suppressed by the flow velocity suppressing portion 5, and as a result, the occurrence of air traps can be prevented.

(Description of examples other than the embodiment)
In this embodiment, a rear combination lamp will be described. However, the present invention may be used for vehicle lamps other than rear combination lamps, such as front combination lamps, individual lamps, interior lamps, and the like.

Further, in this embodiment, the flow velocity suppressing portion 5 is a portion of the welding portion 22 on the lateral side of the vehicle, and at least the vertical direction F of the welding surface 23 (that is, the pressurizing direction F) is a ramp. It is provided at a portion of the housing 2 that intersects with the release direction A. As shown in FIG. However, in the present invention, any other portion of the welded portion 22 or the entire portion of the welded portion 22 may be provided.

Furthermore, in this embodiment, on the surface opposite to the welding surface 23, the abutment surface 26 with which the receiving jig abuts during welding and the flow velocity suppressing portion 5 are provided alternately. However, in the present invention, only the flow velocity suppressing portion 5 may be provided without alternately providing the contact surfaces 26 .

In addition, this invention is not limited by the said embodiment. In particular, the shape and location of the flow velocity suppressors 5, 50, and 51 are not limited.

Reference Signs List 1 vehicle lamp 10 lamp chamber 2 lamp housing 20 body portion 21 vertical wall portion 22 welding portion 23 welding surface 24 inner surface 25 outer surface 26 contact surface 200A, 200B, 200C lamp housing (lamp housing of general vehicle lamp)
200 Body Part 220 Welding Part 230 Welding Surface 240 Inner Side 250 Outer Side 260 Contact Surface 3 Lamp Lens 30 Main Body 31 Welding Part 32 Welding Surface 4 Light Source 40 Mounting Hole 5 Flow Velocity Controlling Part 50 Flow Velocity of Chamfered Shape (C Chamfered Shape) Suppression portion 51 Flow velocity suppression portion with curved shape (R shape) 500 Groove portion (recessed portion)
A release direction (direction to open the mold)
B: Dimension of the flow velocity suppressing portion 5 C: Dimension of the contact surface 26 D1: Diameter of the inscribed circle (thickness of the welded portion 22 provided with the flow velocity suppressing portion 5)
D2 Diameter of inscribed circle (thickness of welded portion 22 without flow velocity suppressing portion 5)
D3 Diameter of inscribed circle (thickness of body portion 20)
F Pressing direction (vertical direction of welding surface 23)

Claims (4)

comprising a lamp housing and a lamp lens,
The lamp housing and the lamp lens are each provided with a welding portion having a welding surface,
the lamp housing and the lamp lens are welded together at the welding surfaces to form a lamp chamber;
The welded portion of the lamp housing is provided with a flow velocity suppressing portion obtained by removing a part of a corner portion of the outer surface opposite to the inner surface on the lamp chamber side.
A vehicle lamp characterized by: The lamp housing has a main body and the welding part protruding in a direction intersecting the main body,
The flow velocity suppressing portion is at least a portion of the welding portion of the lamp housing in which the vertical direction of the welding surface intersects the release direction of the lamp housing , and the portion intersects with the main body portion. Provided on a part of the corner on the outer surface ,
The vehicle lamp according to claim 1, characterized in that: The flow velocity suppressing portion is provided alternately with the contact surface on which the receiving jig contacts during welding, on the surface opposite to the welding surface.
3. The vehicle lamp according to claim 1, wherein: The plate thickness of the welded portion of the lamp housing provided with the flow velocity suppressing portion is smaller than the plate thickness of the welded portion of the lamp housing not provided with the flow velocity suppressing portion,
The vehicle lamp according to any one of claims 1 to 3, characterized in that:

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