JPH0436482Y2 - - Google Patents

Description

[Detailed Description of the Invention] The vehicle lamp of the present invention will be explained according to the following items.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems F. Examples [Figs. 1 to 9] a. Lamp body [Fig. 1] [Fig. 1 to Fig. 4] b Pipe [Fig. 1 to Fig. 8] c Lens [Fig. 1 to Fig. 4] d Light bulb [Fig. 1 to Fig. 4] e Function of pipe G Effect of the invention (A Industrial Field of Application) The present invention relates to a novel vehicular lamp. Specifically, by ventilating the lamp space with the outside via a pipe, fogging that occurs on the lens and reflective surface due to temperature differences due to lighting is removed, and the lamp space is communicated with the outside. In a new vehicle light fixture that prevents dust, water, etc. from entering the light space from the outside through the
It is an object of the present invention to facilitate the formation of the pipe and to enable the pipe to be used in various vehicular lamps of different sizes.

(B Summary of the invention) The vehicular lamp of the present invention is a vehicular lamp in which a lamp space defined by a lamp body and a lens is communicated with the outside through at least two or more pipes. All of the pipes are bent at multiple points, and are formed by connecting the upper and lower portions each having a bent portion with a substantially straight middle portion, and the shape of the upper and lower portions of the pipes is the same throughout all pipes. However, the length of the middle part of the pipe is formed to be different for each pipe, and this prevents water and dust from reaching the lamp space even if water or dust enters from the tip of the pipe, and also prevents the above-mentioned This facilitates the formation of the pipe, and further eliminates the need to prepare a special pipe even if the size of the vehicle lamp differs.

(C. Prior Art) Regarding vehicle lamps, especially automobile headlights,
There is a large temperature difference between when the lamp is not lit and when it is lit. Therefore, when the lamp is turned on, the lenses and reflective surfaces become cloudy due to a small amount of moisture in the lamp space.

When the lens or reflective surface becomes cloudy, the transmittance of the luminous flux decreases, resulting in the inconvenience that a predetermined light distribution cannot be obtained and a sufficient field of view cannot be obtained.

By the way, the above-mentioned fogging is caused by the presence of moisture in the lamp space, so we tried to make the lamp a sealed type to prevent moisture from entering the lamp space, thereby preventing fogging on the lens and reflective surface. Automobile headlights have been proposed in the past.

(Problems to be solved by the invention D) However, no matter how high the degree of sealing is, it is extremely difficult to completely prevent moisture from entering the lamp space.

Therefore, instead of preventing moisture from entering the lamp space, the lamp space is communicated with the outside through a pipe so that outside air can pass through the lamp space.
A so-called vent-type automobile headlamp that attempts to eliminate fogging caused by passing outside air into the lamp space by utilizing the air convection within the lamp space that occurs when the lamp is lit. Lights are also suggested.

However, when the lamp space is communicated with the outside through a pipe, there is a problem in that water and dust enter the lamp space through the pipe.

Therefore, it may be possible to bend the pipe at multiple points to make it difficult for water and dust to pass through, but if the pipe has multiple bends, it becomes difficult to form the pipe. .

In addition, since the length of the above-mentioned pipe must be changed depending on the size of the vehicle light fixture in which it will be used, it is necessary to prepare the same number of types of pipes as the number of types of vehicle light fixtures in which the pipe will be used. There is a problem that needs to be maintained.

(E. Means for Solving Problems) In order to solve the above-mentioned problems, the vehicle lamp of the present invention uses at least two or more pipes to fill the lamp space defined by the lamp body and the lens. Each of the pipes is bent at a plurality of places, and is formed by connecting an upper and lower part each having a bent part to a substantially straight middle part, The shapes of the upper and lower portions of the pipes are the same for all pipes, but the lengths of the middle portions of the pipes are different for each pipe.

Therefore, in the vehicle lamp of the present invention, even if water or dust tries to enter from the tip of the pipe, it will be blocked by the bent part of the pipe and will not easily reach the lamp space. This can prevent the inner surface of the lens, reflective surface, etc. from getting dirty. Furthermore, since the pipe is formed by being divided into three parts, the number of bends in each part is reduced and the pipe is easy to form. Furthermore, by preparing several pipes with different lengths of the intermediate portion, pipes of various lengths can be easily obtained and can be used with various vehicle lamps of different sizes.

(Embodiment F) [Figs. 1 to 9] Details of the vehicle lamp of the present invention will be described below with reference to illustrated embodiments. Embodiment 1 shown in the drawings is an example in which the present invention is applied to an automobile headlamp.

(a Lamp body) [Figures 1 to 4] 2 is a lamp body made of synthetic resin, for example,
It is made of reinforced plastic reinforced with glass fiber.

The lamp body has an open front surface, and lamp chambers 4, 4 having reflective surfaces 3, 3 shaped like paraboloids of revolution are integrally formed on the inner surface of the lamp body, side by side in the lateral direction.

Light bulb mounting holes 5, 5 are formed in the approximate center of each light chamber 4, 4.The light bulb mounting holes 5, 5 are located slightly from the edges of these openings on the rear surfaces of the light chambers 4, 4. Circular surrounding walls 6, 6 are integrally formed so as to surround the difficult position. The rear end surfaces of these surrounding walls 6, 6 have several notches 7,
7.... is formed. In addition, the surrounding walls 6, 6
Several boss parts 8, 8, . . . are located close to the outside of the
are integrally formed, and these boss portions 8, 8,
. . . has screw holes 9, 9, . . . formed therein. And these boss parts 8, 8, ... and the surrounding wall 6,
6 are formed with ribs 10, 10, . . . .

Reference numerals 11 and 11 denote light bulb mounting plates, and insertion holes 12 and 12 are formed in the center thereof. On the front surfaces of the light bulb mounting plates 11, 11, circular walls 13, 13 are formed forward from the opening edges of the insertion holes 12, 12, and the inner diameters of the walls 13, 13 are equal to the surrounding wall 6. , 6 is formed to a size that allows it to fit snugly onto the outside. Moreover, notches 14, 14, . . . are formed in the walls 13, 13, and the walls 13, 13,
3, 13 onto the surrounding walls 6, 6, the ribs formed between the surrounding walls 6, 6 and the boss portions 8, 8, . . . engage with the notches 14, 14, . I'm starting to do that. And the light bulb mounting plates 11, 11
are formed with screw insertion holes 15, 15, .
The screw holes 9, 9, . . . formed in the holes 8, . Pressing pieces 16, 16 projecting toward the insertion holes 12, 12 from the opening edges of the insertion holes 12, 12 on the rear surfaces of the light bulb mounting plates 11, 11;
... are integrally formed, and one end in the circumferential direction of these pressing pieces 16, 16, ... has an introduction part 17, which is inclined so as to be gradually displaced backward as it goes to the tip. 17. It is said that...

As mentioned above, the light bulb mounting plate 11 has its walls 13,1
3 is fitted onto the surrounding walls 6, 6 of the lamp body 2, and the screws 18, 18, . . . are inserted through the screw insertion holes 15, 15, . It is fixed to the lamp body by being screwed into the screw holes 9, 9, . . . formed in . In this state, the light bulb mounting plates 11, 11
The pressing pieces 16, 16, . . . are positioned so as to cover the notches 7, 7, .
Notches 7, 7, introduction slits 19, 19, whose spacing becomes narrower toward the sides are formed between the tips of ... and the rear end surfaces 6a, 6a of the surrounding walls 6, 6. .

Reference numerals 20 and 21 denote connection pipes that are integrally provided on the rear surfaces of the upper parts of the light chambers 4 and 4, and the inner surfaces and rear sides of the light chambers 4 and 4 are communicated with each other through the connection pipes 20 and 21. There is.

(b Pipes) [Figs. 1 to 8] 22, 23, . . . are pipes, one ends of which are fixed to the connecting pipes 20, 21 in an externally fitted manner.

The pipe 22 has an upper horizontal part 22a extending straight rearward from a part externally fitted onto the connecting pipe 20, an upper vertical part 22b extending downward from the rear end of the upper horizontal part 22a, and an upper vertical part 22b extending downward from the rear end of the upper horizontal part 22a. A lower horizontal part 22c extending laterally from the lower end and a lower vertical part 22d extending downward from the tip of the lower horizontal part 22c are integrally formed, and the lower part of the lower vertical part 22d is a lamp body. It is located further below the lower end of 2. And the lower vertical part 2
The lower end of 2d is beveled at an angle of about 45°, and the beveled surface 24 faces toward the rear and lower part.

The other pipe 23 also has an upper horizontal part 23a, an upper vertical part 23b, a lower horizontal part 23c, and a lower vertical part 23.
d are integrally formed, but the lower vertical portion 23
The lower end of d is located above the lower end of the lamp body 2. Further, the lower end of the lower vertical portion 23d is a beveled surface 25.

Thus, one of the pipes 22 and 23 serves as a discharge pipe, and the other serves as an intake pipe.

Each of the pipes 22 and 23 consists of three parts. That is, it consists of an upper part 26, a lower part 27, and an intermediate part 28.

The upper part 26 is bent into an L shape, and the horizontal part 2
6a is adapted to be externally fitted and fixed to the connecting pipe 20 or 21. Further, a connecting portion 26c is formed at the lower end of the vertical portion 26b.
c is larger in diameter than other parts.

The lower portion 27 includes an upper vertical portion 27a, a horizontal portion 27b, and a lower vertical portion 27c formed in a substantially crank shape. A connecting portion 27d is formed at the upper end of the upper vertical portion 27a, and the connecting portion 27d has a larger diameter than other portions. Further, a beveled surface 27e is formed at the lower end of the lower vertical portion 27c.

The middle part is formed straight, and different lengths 28a and 28b are prepared.

Thus, the upper end of the longer intermediate portion 28a is fitted and fixed to the connecting portion 26c of the upper portion 26, and the intermediate portion 28a
One pipe 22 is formed by internally fitting and fixing the lower end of a to the connecting part 27d of the lower part 27, and the tip of the horizontal part 26a of the upper part 26 is externally fitting and fixing to the connecting pipe 20.

In this pipe 22, the upper part 2
The horizontal part 26a of 6 becomes the upper horizontal part 22a, and the vertical part 26b of the upper part 26, the middle part 28a and the lower part 27
upper vertical portion 23b by upper vertical portion 27a of
The horizontal part 27b of the lower part 27 becomes the lower horizontal part 23c, and the beveled surface 27e of the lower part 27 becomes the beveled face 24.

Further, the upper end of the shorter intermediate portion 28b is connected to the upper portion 26.
The lower end of the intermediate part 28b is fitted and fixed to the connecting part 27d of the lower part 27 to form the other pipe 23, and the tip of the horizontal part 26a of the upper part 26 is fitted externally to the connecting pipe 21. Fitted and fixed.

In this pipe 23, the upper part 26
The horizontal part 26a of the upper part 26 is the upper horizontal part 23a, the upper vertical part 23b is constituted by the vertical part 26b of the upper part 26, the intermediate part 28a, and the upper vertical part 27a of the lower part 27, and the horizontal part 27b of the lower part 27 is the lower part 23a. The horizontal portion 23c is the horizontal portion 23c, and the beveled surface 27e of the lower portion 27 is the beveled surface 25.

(c Lens) [Figs. 1 to 4] Reference numeral 29 denotes a lens, which is airtightly attached to the front surface of the lamp body 2 so as to cover the front surfaces of the lamp chambers 4, 4.

(d Light bulb) [Figures 1 to 4] 30 and 30 are light bulbs.

The light bulb 30 consists of a glass bulb 32 in which a filament 31 is enclosed, and a cap 33 on which the glass bulb 32 is supported.

The support 34 is a metal holder wrapped around the rear end of the glass bulb 32, and the holder 34 is supported by support pins 35, 3 protruding from the front end of the cap 33.
5, is fixed to..., thereby, the glass bulb 3
2 and the base portion 33 are connected.

A connector portion 36 is integrally formed in the cap portion 33 , one end of a contact piece (not shown) is located within the connector portion 36 , and the other end protrudes from the front end of the cap portion 33 to connect to the outside led out from the glass bulb 32 . Connected to lead wire.

A flange 37 is located near the front end of the mouthpiece 33.
are protrudingly provided, and engaging pieces 38, 38, are provided at intervals in the circumferential direction from the outer peripheral edge of the flange 37.
38 is provided protrudingly. Note that this engagement piece 38, 3
The widths of the notches 8 and 38 substantially match the widths of the notches 7, 7, 7 provided in the surrounding wall 6 formed in the lamp body 2, and the engaging pieces 38, 38, 38 are connected to the notches 7, 7, 7.
7 so as to fit snugly.

Reference numeral 39 denotes an O-ring made of an elastic material and attached to the outer peripheral surface of the front end of the base portion 33.

Thus, the light bulb 30 is inserted into the light chamber 4 through the glass bulb 32 through the 11 insertion holes 12 of the light bulb mounting plate and the surrounding wall 6. Then, the engaging pieces 38, 38, 38 of the light bulb 30 are connected to the pressing pieces 16 of the light bulb mounting plate 11.
It comes into contact with the rear surface of the Then, the whole light bulb 30,
The engaging pieces 38, 38, 38 rotate so as to move toward the entrances of the introduction slits 19, 19, 19 of the light bulb mounting plate 11. Then, the engaging pieces 38,3
8, 38 enter the introduction slits 19, 19, 19 while bending the introduction parts 17, 17, 17 slightly backward, and eventually the notches 7, 38 provided in the surrounding wall 6.
7, 7, and in this state the engaging pieces 38, 38,
38 is the pressing piece 16, 16, 16 of the light bulb mounting plate 11
It is held by being pressed from behind by the

The light bulbs 30, 30 are attached to the lamp body 2 in this way, and the O-rings 39, 39 attached to the bulbs 30, 30 at this time are attached to the surrounding walls 6, 6.
It is compressed between the bulb and the inner peripheral surface of the bulb, making the bulb mounting part airtight.

Therefore, the lamp space 40 defined by the lamp body 2 and the lens 26 is connected to the two pipes 2.
It is communicated with the outside only through 2 and 23. Incidentally, the lamp space 40 is formed in a state where the two lamp chambers 4, 4 are communicated with each other.

(e) Effect of pipe In the above-mentioned automobile headlamp 1, when a car equipped with this headlamp runs, the lower end of one of the pipes 22 is located below the lower end of the lamp body 2, so that when the car is running, Wind pressure associated with this is applied to the lower end of the pipe 22. Since the lower end of this pipe 22 is obliquely cut, and the beveled surface 24 faces toward the lower rear, the air flow that winds around and passes through the lower end of this pipe 22 causes the beveled surface 24 to
Negative pressure is generated.

Therefore, the air in the lamp space 40 is forcibly discharged through the pipe 22 due to the negative pressure, and new air is replenished into the lamp space 40 through the other pipe 23.

In this way, in the above automobile headlamp 1, air flow is generated within the lamp space 40 as the automobile in which it is installed runs, and this is done while always taking in outside air. It turns out.

Therefore, in the above automotive lighting 1, even if fogging occurs on the inner surface of the lens 29 or the reflective surface 3 due to lighting, once the automobile starts running, the resulting fog in the lighting space 40 will be reduced. The fogging will be rapidly removed by the flow of air while bringing in outside air.

It should be noted that if the inside of the lamp space 40 is communicated with the outside, there is a risk that dust will enter the lamp space 40 and adhere to the reflective surface 3 and the inner surface of the lens 39. In case 1, since the pipes 22 and 23 are each formed with three bends, the speed of the dust is reduced at these bends, making it even more difficult for the dust to reach the upper ends of the pipes 22 and 23. . Also, each pipe 2
2 and 23 have two horizontal parts 22a and 22, respectively.
c, 23a, 23c are formed, and the pipe 2
Even if dust enters into 2 or 23, the dust will
These horizontal parts 22a, 22c, 23a, 23c
, and hardly enters into the lamp space 37.

Furthermore, water intrusion is hardly a problem. Furthermore,
Since the lower ends of the pipes 22 and 23 are beveled 24 and 25, it is difficult for water droplets to adhere thereto.

Incidentally, if the pipes 22 and 23 are made removably attachable to the lamp body 2 and replaced periodically, the inside of the lamp space 40 can be kept even more clean.

The inner diameters of the pipes 22 and 23 are most preferably in the range of 5 mm to 10 mm. The reason for this is that if the inner diameter is less than 5 mm, there is a risk of clogging due to the surface tension of water droplets adhering to the lower ends of the pipes 22, 23, and if the inner diameter is more than 10 mm, there is a risk that water and dust may easily enter. This is because there is a

Furthermore, it is desirable that the pipes 22 and 23 be connected to the lamp body 2 at the upper end of the lamp body 2. By doing this, the pipe 22,
The length of 23 can be increased, and the effect of preventing the intrusion of dust and the like is enhanced. And pipe 2
When the connecting portions 2 and 23 are located at the upper part of the lamp body 2, when viewed through the lens 29, the connecting holes (openings on the lamp space 37 side of the connecting pipes 20 and 21) are located at the lower side. It also has the advantage of being less noticeable than in other cases.

(G. Effect of the invention) As is clear from the above description, the vehicle lamp of the present invention communicates the lamp space defined by the lamp day and the lens with the outside through at least two or more pipes. The above-mentioned pipe is bent at a plurality of places, and is formed by connecting an upper and lower part each having a bent part to a substantially straight middle part,
The shape of the upper and lower parts of the pipes is the same for all pipes, but the length of the middle part of the pipes is different for each pipe.

Therefore, in the vehicle lamp of the present invention, even if water or dust tries to enter from the tip of the pipe, it is blocked by the bent part of the pipe and cannot easily reach the lamp space. This can prevent the inner surface of the lens, reflective surface, etc. from getting dirty. Furthermore, since the pipe is formed by being divided into three parts, the number of bends in each part is reduced, and the pipe is easy to form. Furthermore, by preparing several pipes with different lengths of the intermediate portion, pipes of various lengths can be easily obtained, and can be used with various vehicular lamps of different sizes.

In the above embodiment, two pipes are provided, and a negative pressure is generated at the lower end of one of the pipes, thereby forcibly generating air flow within the lamp space. However, the application of the present invention is not limited to such things.
The present invention can be widely applied to vehicle lamps in which the lamp space is communicated with the outside through a pipe.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the vehicle lamp according to the present invention, and FIG. 1 is a partially exploded perspective view, and FIG.
The figure is a horizontal sectional view, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is an enlarged sectional view of the main part, Figures 5 to 8 show one pipe, and Figure 5 is FIG. 6 is an exploded perspective view, FIG. 6 is a rear view, FIG. 7 is a side view, FIG. 8 is a sectional view taken along the line - in FIG. 6, and FIG. 9 is a perspective view of the other pipe. Explanation of symbols, 1... Vehicle lamp, 2... Lamp body, 22, 23... Pipe, 26... Upper part,
27... lower part, 28... middle part, 29... lens, 40... lamp space.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle lamp in which a lamp space defined by a lamp body and a lens is communicated with the outside through at least two or more pipes, and each of the pipes is a plurality of pipes. It is formed by connecting the upper and lower parts, each having a bent part, with a substantially straight middle part, and the shapes of the upper part and the lower part of the pipe are the same for all pipes, but the middle part of the pipe is A vehicle lamp characterized in that each pipe has a different length.