JP3104158B2 - Structure of vehicle cover tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cover tube for a vehicle.

[0002]

2. Description of the Related Art When moisture inside a lamp becomes water droplets and adheres to the inner surface of a lens due to a rapid change in temperature, the function of the lamp is significantly reduced. Further, when the temperature inside the lamp rises due to the heat generated when the bulb is turned on, the lamp is thermally deformed. For this reason,
For example, in vehicle lamps such as headlamps, clearance lamps, rear combination lamps, etc., vent holes are formed in the body main body for the purpose of preventing generation of water droplets, fluctuations in temperature and pressure, etc. They are communicating.

FIG. 6 shows a conventional vehicular lamp having such a vent hole. The vehicular lamp is schematically described as follows. 1 is a body main body, 2 is a front lens which forms a lamp chamber A together with the body main body 1, The front lens 2 has a seal leg 3 formed of a frame-like body integrally protruding from the rear peripheral edge portion, inserted into a seal groove 5 of a lens mounting portion 4 provided integrally with a front opening of the body main body 1, and a sealing agent. By being fixed at 6, the front opening of the body main body 1 is airtightly covered. Reference numeral 7 denotes a valve inserted into the body 1 through a valve mounting hole 8 formed at the rear top of the rear surface of the body 1, and 9 denotes a valve 7
Is a tube mounting portion which has a ventilation hole 10 communicating the inside and outside of the body main body 1 and is integrally provided rearward at an appropriate position on the back of the body main body 1. A cover tube 12 is attached to prevent rainwater or the like from entering. The cover tube 12 is made of rubber, resin, or the like. The end opposite to the tube mounting portion 11 is bent vertically downward in order to prevent rainwater or the like from entering the body 1 through the ventilation hole 10. ing.

[0004]

As described above, in the conventional vehicular lamp, the ventilation hole 10 is provided to prevent the temperature, pressure and the like in the body 1 from rising and to prevent water droplets from adhering to the inner surface of the lens. The cover tube 12 is provided in the main body 1 to prevent rainwater or the like from entering through the ventilation hole 10. The conventional cover tube 12 has a uniform thickness over its entire length and is soft. Since it is formed of rubber, resin, or the like, the tube mounting portion 11
When connecting to the tube, if the user grips the connection end with a finger, this portion is easily crushed and difficult to fit into the tube mounting portion 11, and there is a problem that the mounting operation is troublesome.

Therefore, as a cover tube which solves such a problem, for example, one disclosed in Japanese Utility Model Laid-Open No. 4-66714 is known. This cover tube 1
Reference numeral 4 denotes a grommet main body 15 connected to the tube mounting portion 11, a solid knob 16 which can be picked with a fingertip integrally protruding rearward as shown in FIG.
It is a cross-sectional shape of a mold. However, even though the knob 16 of the cover tube 14 is effective when detached from the tube attaching section 11, the knob 1 is not attached when the tube is attached.
When the tube body 15 is pressed against the tube mounting portion 11 by grasping the tube 6, the connecting portion 15a of the tube body 15 is pressed by the knob portion 16, so that the connecting portion 15a is easily buckled and connected well. There was a problem that can not be. In addition, there is also a problem that the cover tube itself becomes large due to the knob 16.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make it compact and easy to attach and detach a cover tube, and to be easy to remove. An object of the present invention is to provide a structure of a vehicle cover tube that can reliably prevent water from entering the interior of a lamp.

[0007]

According to the present invention, in order to achieve the above object, a tube mounting portion having a ventilation hole for communicating the inside and outside of the body main body is protruded at an appropriate position on the back of the body main body, and the tube mounting portion is provided in the tube mounting portion. In a vehicle to which a cover tube is connected, by forming the cover tube integrally with an elastomer or a plastomer, a thick-walled cylindrical connecting portion fitted and connected to the tube mounting portion;
An external air introduction portion formed thinner than the connection portion and having an upper end connected to a rear end of a lower surface of the connection portion;
Is formed with a flat surface .

[0008]

According to the present invention, the cover tube is connected to the tube mounting portion to prevent water from entering the body through the vent hole. Since the cover tube is formed of an elastomer or plastomer, it has a high elastic modulus and easily deforms when an external force is applied. However, the cover tube returns to its original shape as soon as the external force is removed, and thus has high adhesion to the tube mounting portion. Further, since the outside air introduction portion is connected to the rear end of the lower surface of the connection portion, the cover tube has no knob portion protruding rearward of the connection portion. The connection portion of the cover tube forms a knob for attachment and detachment. This connecting portion is deformed when picked with a finger, but is slightly deformed due to its thick wall.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a front view showing an embodiment of a vehicle lamp equipped with a cover tube according to the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II of FIG. 1, FIG.
FIG. 4 is a sectional view taken along line IV-IV of FIG.
(B), (c) is the perspective view, front view, and sectional drawing of a cover tube. In the drawings, the same components as those in FIGS. 6 and 7 are denoted by the same reference numerals, and description thereof will be omitted. In these figures, the present embodiment is applied to a front turn signal lamp 20 attached to a front corner of a vehicle body. The body 1 of the front turn signal lamp 20 has a substantially rectangular front opening 21 that is long in the left-right direction, and the bulb 7 for the front turn signal lamp and the inner lens 22 are disposed inside. The inner surface of the body 1 forms a reflective surface by vapor deposition of aluminum or the like. The inner surface of the rear surface of the body 1 forms a paraboloid of revolution 23. The front lens 2 that hermetically closes the front opening 21 of the body main body 1 is formed into a convex curved shape so as to form the same plane as the corner of the vehicle body, and has a lens step 2a (FIG. 2) formed of a plurality of cylindrical lenses on the inner surface. 2) is formed.

At the center of the back surface of the body 1, a cylindrical socket plug mounting portion 25 is integrally provided to protrude rearward. The socket plug mounting portion 25 is a valve opened at the center of the rear end face. It has a mounting hole 8. A bulb socket 9 for holding the front turn signal lamp bulb 7 is fitted and fixed to the bulb mounting hole 8 from behind the lamp. The bulb 7 is arranged in the body 1 so that the filament 7a is coincident with the focal position of the paraboloid of revolution 23.

The inner lens 22 is formed of a translucent resin colored in amber and is formed in a cylindrical shape having an open back surface.
And a screw mounting portion 26 integrally protruding from a rear end portion of the outer peripheral surface is fixed to an inner surface of the socket plug mounting portion 25 by a screw 27. On the inner surface of the inner lens 22, a Fresnel lens 22a for converting the light from the bulb 7 into parallel rays is formed.

Further, a tube mounting portion 11 is provided on one side of the socket plug mounting portion 25 on the back of the body main body 1.
And a peripheral wall 28 surrounding the tube mounting portion 11
Are protruded integrally toward the rear of the lamp.
The tube mounting portion 11 has a ventilation hole 10 for communicating the inside and the outside of the body main body 1, and a cover tube 3 is provided at a distal end portion 11 a.
0 is connected. As shown in FIG. 4, the outer diameter of the distal end portion 11a is reduced to define the connection dimension of the cover tube 30.

The peripheral wall 28 is connected to the cover tube 30.
Notch opening 2 at the bottom end.
8a (FIG. 1) is provided to drain rainwater or the like that has entered the peripheral wall 28 to the outside.

In FIG. 5, the cover tube 30
Is formed into a U-shape (or U-shape) when viewed from the side of the lamp with an elastomer or plastomer that has a large elastic modulus and easily deforms when an external force is applied, but returns to its original shape immediately after the external force is removed. A thick cylindrical connecting portion 30A fitted and connected to the tube mounting portion 11;
An L-shaped outside air introduction portion 30B formed thinner than the connection portion 30A and having an upper end connected to the rear end of the lower surface of the connection portion 30A has a front surface 32a of the connection portion 30A and an outside air. An insertion hole 31 that opens to the lower end surface 32b of the introduction portion 30B is formed. Back surface 32c of connecting portion 30A
Is formed as a flat surface, and the back surface 32c and the back surface 32d of the outside air introduction part 30B form the same plane. Back 3
The reason why 2c is formed as a flat surface is that when the cover tube 30 is inserted into the tube mounting portion 11 by pressing the back surface 32c at the time of connection, it is easy to push. Connection part 30A
Is about 1/4 to 1/1 of the inner diameter,
The thickness of B is about 1/15 to 1/3 of the inner diameter, and in the case of the present embodiment, the connection portion 30A is １ ／ of the inner diameter, and the outside air introduction portion 30B
Is set to 1/7 of the inner diameter.

As the material of the cover tube 30, in the case of an elastomer, a vulcanized rubber, a thermoreversible elastomer such as a thermoreactive urethane rubber, an elastic fiber such as a polycarbonate elastic fiber, an elastic foam such as a sponge rubber, or the like is used. used. On the other hand, in the case of a plastomer, a synthetic resin such as polystyrene is used.

The front turn signal lamp 20 having such a configuration is disposed adjacent to the headlamp 40, and the body 1 is mounted on the vehicle body by a plurality of mounting screws (not shown) and stud pins 41 (FIG. 3). 42. The stud pin 41 protrudes from the back surface of the body 1, and has a leading end connected to a fastener 43 attached to the vehicle body 42.

The cover tube 3 having such a configuration
In the case of No. 0, the connecting portion 30A made of a polymer material having a high elastic modulus made of an elastomer or a plastomer and having a thick wall portion and an outside air introducing portion 30B having a thinner wall thickness are integrally formed. 30A was attached and used as the knob for removal.
Even when the connecting portion 30A is pressed against the first connector 1, the connection can be easily made without buckling deformation. Further, the connecting portion 30A is easily deformed when an external force is applied as a material, but immediately returns to its original shape when the external force is removed.
Not only does it have a high adhesion to the tube mounting portion 11 and does not easily fall off, but it is also excellent in waterproofness. In addition, the cover tube 30 has no knob portion protruding rearward of the connection portion 30A because the outside air introduction portion 30B is connected to the rear end of the lower surface of the connection portion 30A, so that the conventional cover tube shown in FIG. The size can be reduced in comparison. Further, the back surface 3 of the connection portion 30A
Since 2c is formed on a flat surface, the cover tube 30 can be easily inserted by pressing the back surface 32c and inserting the cover tube 30 into the tube mounting portion 11. Furthermore,
Since the connecting portion 30A is thick and slightly deformed, it can be attached by a machine.

In the above embodiment, the case where the outside air introduction portion 30B of the cover tube 30 is formed in an L-shape is shown.
The present invention is not limited to this, and may be formed in a straight pipe shape extending vertically downward. Although the above-described embodiment has been described with reference to the case where the present invention is applied to the front turn signal lamp 20, the present invention can also be applied to other lamps such as a tail light and a display having no light source such as a garnish.

[0019]

As described above, the structure of the cover tube for a vehicle according to the present invention is such that the cover tube for preventing intrusion of rainwater or the like from the ventilation hole provided in the body body is made of an elastomer or a plastomer, and the thickness of the cover tube is increased. Since the formed tubular connecting portion, and the outside air introduction portion whose upper end is connected to the rear end of the lower surface of the connecting portion, which is thinner than the connecting portion, the connecting portion is attached, and the knob portion at the time of removal is used. Even if the connecting portion is pressed against the tube mounting portion, it can be easily connected without buckling deformation. In addition, since the cover tube has high elasticity, it has a high adhesion between the connecting portion and the tube mounting portion, is hard to fall off, and is excellent in waterproofness.
Further, since the connecting portion of the cover tube is thick and slightly deformed, it can be mounted by a machine. Furthermore, since the outside air introduction portion is connected to the rear end of the lower surface of the connection portion, there is no knob portion protruding rearward of the connection portion, and the cover tube can be downsized.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a vehicular lamp provided with a cover tube according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

FIGS. 5A, 5B, and 5C are a perspective view, a front view, and a cross-sectional view of a cover tube.

FIG. 6 is a sectional view showing a conventional example of a vehicular lamp.

FIG. 7 is a cross-sectional view showing another conventional example of a cover tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body main body, 2 ... Front lens, 3 ... Seal leg, 4 ...
Lens mounting portion, 5: seal groove, 10: vent hole, 11: tube mounting portion, 12, 30: cover tube, 30A ...
Connection part, 30B ... outside air introduction part.

Claims (1)

(57) [Claims] 1. A projecting tube mounting part having a vent hole for communicating the inside and outside of the main body to the back appropriate positions of the main body, in a vehicle which is connected to cover tube to the tube attaching portion, the cover tube elastomer or By being integrally formed by a plastomer, a thick cylindrical connecting portion fitted and connected to the tube mounting portion, and formed thinner than the connecting portion and the upper end is connected to the rear end of the lower surface of the connecting portion. constituted by the outside air introduction portion, the contact
A structure of a cover tube for a vehicle, wherein the back surface of the connecting portion is formed as a flat surface .