JP2595180Y2 - Vehicle lighting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp. More specifically, the present invention relates to a vehicle lamp equipped with a waterproof cover for preventing water from entering the lamp.

[0002]

2. Description of the Related Art FIG. 10 of Japanese Utility Model Laid-Open Publication No. 64-18503 shows an example of a conventional vehicle lamp of this type. Such a vehicular lamp has a housing (1) provided with an opening (11) for valve insertion at the rear, and a light chamber (1) attached to a front opening (10) of the housing (1) together with the housing (1). 14), a bulb (3) disposed in the lamp chamber (14), the periphery of the valve insertion opening (11) of the housing (1) and the bulb (4). A) a waterproof cover (5) arranged between the base and the base (41) to prevent water from entering the lamp. The waterproof cover (5) includes a boss (50), a bellows-like elastic portion (51) integrally provided from the outer peripheral surface of the boss (50), and an outer periphery of the elastic portion (51). The cylindrical tubular portion (52) provided, an engaging portion (53) integrally provided on the outer periphery of the tubular portion (52), and a skirt-shaped cover integrally provided from the engaging portion (53). (54), and a U-shaped contact portion (55) formed by being bent at the center of the inner peripheral surface of the cover portion (54). The boss portion (50) of the waterproof cover (5) thus formed is fitted onto the base (41) of the valve (4) and closely adhered thereto, and the waterproof cover (5) is formed.
Of the housing (1) to the rear opening (1) of the housing (1).
1), the engaging portion (53) of the waterproof cover 5 is engaged with the engaging projection (13) of the housing (1), and the contact portion (55) of the waterproof cover (5) is connected to the housing (5). 1) Contact and adhere to the rear part. Thus, the waterproof cover (5)
Rear part of housing (1) and valve (4) base (41)
To prevent water from entering the lamp.

[0003]

However, in the above-mentioned conventional vehicle lighting device, the waterproof cover (5) is mounted on the housing (1), and the contact portion (55) of the waterproof cover (5) is elastically operated. The housing (1) is brought into contact with the peripheral portion of the rear opening (11) through which the bulb is inserted, to seal the rear of the housing (1), and water is supplied from the rear opening (11) of the housing (1) to the lamp. It is configured to prevent intrusion into the inside. To this end, the contact portion (55) is transferred to the housing (1) depending on the dimensional accuracy of the housing (1) and the waterproof cover (5) and the manner of mounting the waterproof cover (5) on the housing (1). This has a problem in that the contact of the waterproof cover (5) with the contact portion (55) is incompletely sealed to the rear portion of the housing (1), and water enters the lamp room.

Accordingly, the present applicant has proposed a vehicular lamp (Japanese Utility Model Application No. 62-111403 (Japanese Utility Model Application Laid-Open No. Sho-64) which can completely prevent the water from entering the lamp chamber by completely sealing the rear portion of the housing. -18503)). The present invention relates to an improvement of the above-described vehicle lamp, and an object of the present invention is to provide a vehicle lamp having an improved waterproof effect.

[0005]

According to the present invention, a first seal bead and a second seal bead are annularly provided on one surface of a waterproof cover located between a contact portion of a housing and a contact portion of a mounting cap. A third seal bead is provided annularly on the other surface of the waterproof cover, and the waterproof cover is mounted on the housing with a mounting cap, so that the first seal bead, the second seal bead, and the third seal bead of the waterproof cover are provided. In a vehicle lamp configured to press a bead against a contact portion of the housing and a contact portion of the mounting cap, the first seal bead is a fulcrum,
In addition, the second seal bead is provided with an inclined surface that comes into contact with the contact portion.

[0006]

According to the present invention, the waterproof cover is mounted on the housing with the mounting cap and the first seal bead, the second seal bead, and the third seal bead of the waterproof cover are tightened by the tightening force of the mounting cap. By pressing against the contact portion of the housing and the contact portion of the mounting cap, respectively, the seal between the waterproof cover and the housing and between the waterproof cover and the mounting cap is reliably ensured. At this time, in the present invention, the first seal bead serves as a fulcrum, and the inclined surface of the second seal bead is bent to come into contact with the contact portion, so that the waterproof effect is further improved.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp according to an embodiment of the present invention; In the drawing, reference numeral 6 denotes a housing. The housing 6 has openings 60 and 61 at the front and rear portions, respectively, and a recess 62 at the front opening 60 for sealing the lens 2 and the sealing leg 20. Three engaging claws 63 are provided on the outer peripheral surface of the rear portion of the housing 6.
Projected integrally at equal angular intervals. A contact portion 65 is provided on the periphery of the rear opening 61 of the housing 6 for inserting the valve 4.

In the figure, reference numeral 2 denotes a lens, which has a dish shape, and has a seal leg 20 around the entire opening.
Are provided integrally. The sealing leg 20 of the lens 2 is sealed in the concave portion 62 of the housing 6 with the sealing agent 21, and the lens 2 is attached to the front opening 60 of the housing 6 to define the lamp room 14.

Reference numeral 3 denotes a pivot bearing or the like (not shown) in a lamp chamber 14 defined by the housing 6 and the lens 2.
The reflector 3 is provided with openings 30 and 31 at the front and rear portions, respectively. The rear opening 31 is provided with an engaging portion 32 with which a flange 42 of the valve 4 described later is engaged, and one end of a mounting spring 33 is attached to the rear opening 31.

Reference numeral 4 denotes a bulb. The bulb 4 is a glass tube 40 in which a filament (not shown) is sealed, a cylindrical base 41 integrally provided at the rear of the glass tube 40, and the base. A flange portion 4 integrally protruding from an intermediate portion of 41
2 and a terminal 43 protruding rearward from the rear end of the base 41. The glass bulb 40 of the bulb 4 thus formed is inserted into the reflector 3 from the rear opening 31 of the reflector 3,
The flange 42 of the valve 4 is engaged with the engagement portion 32 of the reflector 3, and the flange 4 of the valve 4 is
2 is pressed against the rear opening of the reflector 3, and the valve 4 is detachably mounted on the reflector 3.

Reference numeral 7 denotes a waterproof cover made of rubber. The waterproof cover 7 has a boss 70 having an annular uneven surface on its inner peripheral surface.
A U-shaped elastic portion 71 integrally extending rearward and outward from the outer periphery of the boss portion 70, and a plate-shaped contact portion integrally extending outward from the outer periphery of the elastic portion 71 The connecting portion 73 includes a connecting portion 73 integrally and substantially perpendicularly extending forward from the outer periphery of the contact portion 72, and an O-ring portion 74 provided at a front end of the connecting portion 73. A first seal bead 75 and a second seal bead 76 are integrally protruded from one surface of the contact portion 72 (the surface facing the contact portion 65 of the housing 6) in a double annular shape, and the other surface (described later). The surface facing the contact portion 86 of the mounting cap 8), and the first seal bead 75 and the second
A third seal bead 77 is integrally formed at a position corresponding to an intermediate position with the seal bead 76 in a single annular shape. A concave portion 7 between the first seal bead 75 and the second seal bead 76;
8 is provided in a ring shape. The first seal bead 75 has a substantially semicircular cross section, and the height of the first seal bead 75 on the side opposite to the recess 78 (the outer peripheral side of the waterproof cover 7) is reduced. Increase the rigidity of the bead 75. The second seal bead 76 has a substantially right-angled triangular cross section.
The base of the base on the side of the eight side is curved, and the second
The oblique side of the seal bead 76 on the side opposite to the recess 78 (the inner peripheral side of the waterproof cover 7) is bent outward to form an inclined surface 7.
9 to increase the flexibility of the second seal bead 76. The third seal bead 77 has a substantially isosceles right triangle shape in cross section, and is located at a substantially intermediate position between the first seal bead 75 and the second seal bead 76.

Reference numeral 8 denotes a mounting cap made of resin. The mounting cap 8 has a thin hollow cylindrical shape, and has three tapered engagement grooves 80 formed at the front inner peripheral surface thereof at equal angular intervals. At the periphery of the mounting cap 8. The tapered engagement groove 80 is provided with a tapered surface 81 on the inner surface on the front side so that the thickness of the front portion is increased in the clockwise direction in FIG. 7, and a parallel surface 82 is also formed on the inner surface on the front side. , From the clockwise end (thick end) of the aforementioned tapered surface 81. A notch 83 is provided at the counterclockwise end (thin end) of the tapered engagement groove 80. Also, the taper engagement groove 80
(About 60 ° clockwise from the notch 83)
Is provided with a vertical wall 84 for a stopper. A contact portion 86 is provided on the periphery of the rear opening of the mounting cap 8.
Six ribs 87 are integrally provided at the rear portion at equal angular intervals.

The vehicular lamp according to the present invention in this embodiment has the above-described configuration, and how to assemble the same will be described below. First, the boss 70 of the waterproof cover 7 is fitted to the base 41 of the bulb 4. Next, the contact portion 72 of the waterproof cover 7 is set to the contact portion 65 of the housing 6, and the first seal bead 75 and the second seal bead 76 of the waterproof cover 7 are set to face the contact portion 65 of the housing 6. The O-ring 74 of the waterproof cover 7 is set on the housing 6. Then, the notch 83 of the mounting cap 8 is positioned on the engaging claw 63 of the housing 6, and the mounting cap 8 is pushed toward the housing 6, and then the mounting cap 8 is turned clockwise in FIG. Then, the engaging claw 63 of the housing 6 is moved to the tapered surface 8 of the tapered engaging groove 80 of the mounting cap 8.
1, the waterproof cover 7 is pressed toward the housing 6 in the optical axis direction via the mounting cap 8 and the engaging claw 63 hits the vertical wall 84 for the stopper. The engaging claw 63 and the tapered engaging groove 80 of the mounting cap 8 engage with each other, and as a result, the waterproof cover 7 is mounted on the housing 6 via the mounting cap 8.

At this time, according to the present invention, the tapered engaging groove 80 of the mounting cap 8 is rotationally engaged with the engaging claw 63 of the housing 6 and the first force of the waterproof cover 7 is Seal bead 75, second seal bead 76, and third bead
Since the seal bead 77 is pressed against the contact portion 65 of the housing 6 and the contact portion 86 of the mounting cap 8, respectively.
The dimensional accuracy of the housing 6, the waterproof cover 7, the mounting cap 8, etc., and the housing 6 of the mounting cap 8 and the waterproof cover 7
There is no influence on the elastic contact of the first seal bead 75, the second seal bead 76, and the third seal bead 77 with the contact portions 65 and 86 depending on the manner of mounting on the first seal bead 75 and the second seal bead 76. As a result, it is possible to reliably seal between the waterproof cover 7 and the housing 6 and between the waterproof cover 7 and the mounting cap 8, and to completely seal the rear portion of the housing 6 to prevent water from entering the lamp room. Can be reliably prevented.

In the present invention, since the third seal bead 77 on the other surface of the waterproof cover 7 is located between the first seal bead 75 and the second seal bead 76 on the one surface, the third seal bead is provided. The elastic contact and its reaction force at 77 and the elastic contact and its reaction force at the first seal bead 75 and the second seal bead 76 act in opposite directions and alternately, respectively. The seal bead 76 and the third seal bead 77 are
Elastic contact at three points while cooperating with the contact portion 65 of the mounting cap 8 and the contact portion 86 of the mounting cap 8, so that the sealing performance of the rear portion of the housing 6 is further ensured.

Particularly, in this embodiment, the rigidity of the first seal bead 75 is large, and the first seal bead 75 serves as a fulcrum. The second seal bead 76 is applied with approximately three times the normal force. As a result, the second seal bead 76 is
As shown in (5), since the inclined surface 79 is bent from the inner peripheral side to the outer peripheral side of the waterproof cover 7 and pressed against the contact portion 65 of the housing 6, the waterproof effect is further improved.

As shown in this embodiment, the third seal bead 77 is provided on the other surface of the waterproof cover 7 at a position corresponding to an intermediate position between the first seal bead 75 and the second seal bead 76, so that the waterproof bead is provided. The effect is great.

In the above-described embodiment, since the O-ring 74 of the waterproof cover 7 is press-fitted into the groove 9 formed by the housing 6 and the mounting cap 8, the rear part of the housing 6 is more completely sealed. can do.

Further, in the above-described embodiment, an example has been described in which the reflector 3 is disposed in the lamp room 14 defined by the housing 6 and the lens 2 and the bulb 4 is mounted on the reflector 3. The present invention can also be applied to a device provided with a reflecting surface and a valve attached to its housing.

Further, in the above-described embodiment, the means for mounting the waterproof cover 7 on the housing 6 with the mounting cap 8 includes an engaging claw 63 provided on the housing 6 and a tapered engaging groove 80 provided on the mounting cap 8. And the engaging claw 6
The waterproof cover 7 is mounted on the housing 6 by pivotally engaging the tapered engagement groove 80 with the housing 3. If the waterproof cover 7 is mounted on the housing 6 by moving the waterproof cover 7 in the optical axis direction, the above-described configuration is adopted. The mounting means other than the engaging claw 63 and the tapered engaging groove 80 may be used.

[0021]

As is clear from the above, the vehicular lamp of the present invention has a further improved waterproofing effect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a vehicular lamp according to the present invention.

FIG. 2 is an enlarged sectional view of a portion II in FIG.

FIG. 3 is a partially enlarged sectional view of a main part before a fastening force of a mounting cap is still applied.

FIG. 4 is a partially enlarged cross-sectional view of a main part in a state where a fastening force of a mounting cap is applied.

FIG. 5 is a vertical sectional view of a waterproof cover.

FIG. 6 is a front view of the mounting cap.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a rear view of the mounting cap.

[Explanation of symbols]

14 ... light room, 2 ... lens, 3 ... reflector, 4 ... bulb, 41 ... base, 6 ... housing, 61 ... rear opening,
63 ... engaging claw, 64 ... contact surface, 7 ... waterproof cover, 72 ...
Contact part, 74 O-ring part, 75 first seal bead,
76: second seal bead, 77: third seal bead, 7
9: inclined surface, 8: mounting cap, 80: taper engagement groove,
86 ... abutment part.

Claims (1)

(57) [Scope of request for utility model registration] 1. A housing provided with an opening for inserting a bulb, a lens attached to the housing to define a lamp chamber together with the housing, a bulb disposed in the lamp chamber, and a bulb inserted into the housing. A waterproof cover disposed between the periphery of the opening and the base of the bulb to prevent water from entering the lamp; and a mounting cap for mounting the waterproof cover to the housing. A contact portion is provided on the peripheral edge of the waterproof cap and the mounting cap is opposed to each other, and a first seal bead is provided on one surface of the waterproof cover sandwiched between the contact portion of the housing and the contact portion of the mounting cap. A second seal bead is provided in an annular shape, and a third seal bead is provided on the other surface of the waterproof cover.
By providing a seal bead in an annular shape and mounting the waterproof cover on the housing with the mounting cap, the first seal bead, the second seal bead, and the third seal bead of the waterproof cover are brought into contact with the contact portion of the housing and the seal bead. In a vehicle lighting device pressed against a contact portion of a mounting cap, the first seal bead is a fulcrum portion, and the second seal bead has an inclined surface that comes into contact with the contact surface. Lights.