JP2000173313A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp which can obtain high brightness with a simple structure and is not necessary to be water proof. SOLUTION: A light source 16 is provided in a light chamber space S defined by a lamp body part 20 provided with a light source inserting hole 12 and a front lens 30. A reflector 18a for reflecting light from the light source toward the front lens 30 is integrally formed with the lamp body 20. A shaping unit U of transparent synthetic resin integrally formed by blow molding includes the lamp body 20 and the front lens 30. The reflector 18a is structured by a reflecting film integrally formed on a back surface of the lamp body 20 of the shaping unit U, and widths d2, d1 of the lamp chamber space and the reflector 18a around the light source 16 in at least one cross section including an optical axis L are made larger than a width d3 of a light emitting part 32 of the front lens 30. Thus, the heat resistance of the lamp body 20 and the brightness of the light emitting part 32 are improved. Furthermore, a structure of the lamp is simplified and water-proofing between the lamp body 20 and the front lens 30 are not necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp in which light emitted from a light source is reflected by a reflector to form a light distribution. In particular, the width of the reflector is made larger than the width of a light emitting portion of a front lens. The present invention relates to a vehicular lamp configured to increase luminance in a light emitting unit.

[0002]

2. Description of the Related Art As a conventional vehicle lamp of this type, as shown in FIG. 7, a lamp 4 as a light source is provided in a lamp room space S defined by a lamp body 1 and a front lens 2, and a lamp body is provided. The light from the bulb 4 is reflected forward by a reflector 6 such as a reflective coating film or an aluminum vapor-deposited film formed integrally with the light emitting element 1. Reference numeral 3 denotes a valve insertion hole into which the valve 4 is inserted.

The brightness of the lamp (front lens 2) is increased by making the vertical width of the reflector 6 larger than the vertical width of the light emitting portion 2a of the front lens 2.

[0004]

However, in the above-described conventional lamp structure, since the area around the bulb 4 in the lamp body 1 is expanded in the vertical direction, the lamp body 1 is not used unless a split mold is used in injection molding. It cannot be easily molded.

Accordingly, as shown in the figure, the lamp body 1 has a first lamp body 1a provided with a bulb insertion hole 3 and a second front opening formed with a front lens 2 for assembling. The lamp body 1b is fixedly integrated. For this reason, the number of components of the lamp components increases, the structure becomes complicated, and furthermore, there is a problem that waterproofing and fixing between the components are required, and the cost is accordingly increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a vehicular lamp which has a simple structure, can obtain high luminance, and does not require much waterproofness.

[0007]

In order to achieve the above object, in the vehicle lamp according to the first aspect,
A container-shaped lamp body provided with a light source insertion hole, a front lens provided on a front portion of the lamp body to define a lamp room space in cooperation with the lamp body, and a light source insertion hole. A vehicular lamp including a light source inserted and disposed in a lamp chamber space, and a reflector provided integrally with the lamp body and reflecting light of the light source toward a front lens. The front lens is constituted by a transparent synthetic resin molding unit molded and integrated by blow molding, and the reflector is constituted by a reflection film integrally formed on the back surface of the lamp body portion of the molding unit, and includes at least an optical axis. The width of the lamp room space around the light source and the width of the reflector in one cross section were made to be larger than the width of the front lens part. Since the lamp room space around the light source and the width of the reflector are expanded outward, the lamp body is less likely to be thermally deformed, and the brightness of the light emitting portion of the front lens portion is also increased. The lamp body and the front lens are formed by a part of the molding unit (lamp body and front lens) which is formed and integrated by blow molding. There is no need to waterproof and secure between the body and the front lens. According to claim 2, in the vehicle lighting device according to claim 1, the light of the light source is formed integrally with the outer surface of the lamp body at a position facing the enlarged lamp room space in the lamp body. A sub-reflector composed of a reflective film that reflects light toward is provided. Since light traveling from the light source to the sub-reflector is reflected by the sub-reflector and added to the light traveling directly from the light source to the reflector, the brightness in the light-emitting portion of the front lens portion is increased accordingly. In particular, when the sub-reflector is formed in a spherical shape with the light source at the center, the angle of incidence of the light reflected by the sub-reflector on the reflector is the same as the angle of incidence of the light directly traveling from the light source to the reflector. Light distribution can be easily controlled. According to Claim 3, in the vehicle lamp according to any one of Claims 1 and 2, the parting line of the blow molding die remains in a region other than the light emitting portion forming region of the front lens portion in the molding unit. I did it.
The region other than the light emitting portion forming region of the front lens portion in the molding unit is a region that does not significantly affect the light distribution of the lamp, and even if the parting line of the blow molding die remains on the outer surface of the molding unit, There is not much problem in light distribution. According to a fourth aspect of the present invention, in the vehicle lamp according to any one of the first to third aspects, an air hole for performing a breathing action is provided near a boundary between the lamp body and the front lens, and the air hole is blown. It was constituted by an air blow supply hole at the time of molding. Through the air holes, the circulation of air between the outside and the inside of the lamp room, that is, the respiration function is performed, and the occurrence of dew condensation in the lamp room is suppressed. Further, since the air blow supply holes at the time of blow molding are used as air holes, it is not necessary to provide separate air holes in the molding unit (lamp body). In addition, since the boundary between the lamp body and the front lens portion is far away from the light source, even if an air hole is provided here, it is hardly noticeable, and even if an air hole is provided in the reflector forming area. Even if it does, there is no effect that hinders the light distribution or lowers the luminance. According to a fifth aspect of the present invention, in the vehicle lighting device according to any one of the first to fourth aspects, the light source insertion hole is formed in a predetermined position of a lamp body portion of a blow-molded molding unit by post-processing. It was constituted by.
Although it is difficult to form a light source insertion hole in the lamp body portion of the molding unit at the same time as blow molding, it is easy to make a hole in the molding unit after blow molding. In claim 6, in the vehicle lighting device according to any one of claims 1 to 5, at a peripheral portion of the light source insertion hole,
A ring-shaped light source insertion hole constituting member integrated with the molding unit by insert blow molding is provided. Since the periphery of the light source insertion hole is formed by a ring-shaped light source insertion hole constituent member separate from the molding unit formed by blow molding, the light source insertion hole peripheral edge is fixedly held by the light source. Therefore, it can be formed in a thickness and a shape having sufficient strength as designed values.

[0008]

Next, embodiments of the present invention will be described based on examples.

1 to 5 show a first embodiment of the present invention. FIG. 1 is a front view of an automotive fog lamp according to the first embodiment of the present invention, and FIG. 2 is a horizontal view of the fog lamp. FIG. 3 is a cross-sectional view (a cross-sectional view along line II-II shown in FIG. 1), FIG. 3 is a vertical cross-sectional view of the same fog lamp (a cross-sectional view along line III-III shown in FIG. 1), and FIGS. FIG. 5 is a view showing a step of forming the lamp body / lens unit by blow molding, and FIG. 5 is a horizontal sectional view of the lamp body / lens unit formed by blow molding.

In these figures, reference numeral 10 denotes an automotive fog lamp, which is a container-shaped synthetic resin lamp body 11 provided with a bulb insertion hole 12, and a lamp body 11.
A front lens 14 coupled to a front opening of the lamp body 11 and defining a lamp room space S in cooperation with the lamp body 11, and a light source inserted into the bulb insertion hole 12 and arranged in the lamp room space S And a reflector 18a provided integrally with the lamp body 11 and reflecting light emitted from the bulb 16 toward the front lens 14.

The lamp body 11 and the front lens 14 are
Lamp body and lens unit U, which is a molding unit made of transparent acrylic resin that is molded and integrated by blow molding
It consists of. That is, the lamp body 11 and the front lens 14 are respectively constituted by the lamp body part 20 on the back side and the front lens part 30 on the front side of the unit U.

A circular hole 2 is provided at the rear top of the lamp body 20.
2 is formed, and a ring-shaped valve insertion hole constituting member 40 made of a synthetic resin having good adhesion to an acrylic resin is integrally formed at a peripheral portion on the back side of the circular hole 22. That is, the lamp body and the lamp body are formed by insert blow molding (see FIGS. 4 (a) and 4 (b)) in which blow molding is performed in a state where the valve insertion hole constituting member 40 is inserted in the mold in advance.
The lens insertion hole constituting member 40 is integrated with the lens unit U.

A groove 44 having an L-shaped cross section is provided around the bulb insertion hole constituting member 40, and the resin layer of the blow-molded lamp body 20 is filled in the groove 44, and the bulb insertion hole is formed. The hole forming member 40 is retained in the lamp body 20 of the lamp body / lens unit U.

The valve insertion hole constituting member 40 includes a circular hole 22.
A circular hole 42 having the same diameter as that of the circular hole 42 is formed, and the circular hole 22 and the circular hole 42 constitute the valve insertion hole 12.
Further, as shown by reference numeral 21 in FIG. 5, the rear top of the lamp body / lens unit U (the lamp body part 20) formed by insert blow molding is closed, so that the circular hole 4 is formed.
A circular hole 22 is formed by performing a drilling process along 2.

The valve insertion hole constituting member 40 includes a valve 1
6 is formed with an annular contact surface 45 for contact with the focus ring 17, and a screw hole 47 for disposing a socket fixture fixing screw 46 on the rear end surface of the valve insertion hole constituting member 40.
Are provided at a plurality of locations. And the valve insertion hole 1
The valve 16 inserted into the valve insertion hole 2 is
It is pressed and held by a socket fixture 48 screwed to zero.

Further, the outer surface (lamp body portion 20 and front lens portion 30) of the lamp body / lens unit U excluding the front surface (see reference numeral 32) of the front lens portion 30.
(Aperipheral surface), an aluminum deposition film 18 is integrally formed, the entire area around the lamp room space S is covered with the aluminum deposition film 18, and the aluminum deposition film 1 is formed on the front surface of the front lens unit 30.
A light emitting portion 32 where no 8 is formed is provided.

As shown in FIG. 2, the lamp body portion 20 is formed in a parabolic shape extending toward the front lens portion 30 in the left-right direction, and the lamp room space S is expanded left and right toward the front. Shape. In contrast, in the vertical direction, as shown in FIG. 3, the constriction 24 is formed between the front lens unit 30, is around the valve 16 of the lamp body 20, shown in FIG. 3 letter S ₁ designates As described above, the vertical width d ₂ of the lamp room space around the bulb 16 is enlarged vertically, and the vertical width d ₄ of the lamp room space (the lamp room space in front of the bulb 16) in the constricted portion 24 of the lamp body portion 20 and It is formed wider (d ₂ > d ₃ > d ₄ ) than the vertical width d _{3 of} (the light emitting part 32 of) the front lens part 30. That is, the lamp room space S has a shape that is enlarged in the vertical direction around the bulb 16. The spherical region defining a lamp chamber space S ₁ that is enlarged vertically in the lamp body 20, centered with parabolic shaped region 20a of the rear side, the center C of the front side of the spherical (the valve 16 ) It is constituted by the shape region 20b.

[0018] Then, at a position facing the lamp chamber space S ₁ that is enlarged vertically in the lamp body unit 20, provided on the paraboloid-shaped region 20a of the rear side of the lamp body unit 20, emitted from the bulb 16 a main reflector 18a parabolic shape for reflecting the light emitting portion 32 of the front lens 30 the light was provided in the spherical-shaped region 20b defining a front surface side of the lamp chamber space S ₁ which is enlarged in the vertical And a spherical sub-reflector 18b for reflecting light emitted from the bulb 16 toward the bulb center C. The vertical width d ₁ of the main reflector 18a
Is substantially equal to the vertical width d ₂ of the lamp space around the bulb 16.

For this reason, the light La traveling from the bulb 16 toward the main reflector 18a is transmitted to the main reflector 1a.
The light is reflected by 8a and travels toward the light emitting section 32 of the front lens section 30. Further, the light traveling from the bulb 16 to the sub-reflector 18b is reflected by the sub-reflector 18b and is added to the light La traveling directly from the bulb 16 to the main reflector 18a, as shown by a reference numeral Lb in FIG.
As a result, the amount of light emitted forward from the light emitting section 32 of the front lens section 30 is increased, and the visibility in the front irradiation area is improved, and the brightness in the light emitting section 32 is increased. The visibility of the fog lamp is also improved.

Reference numeral 25 denotes an air hole provided on the side surface of the lamp body portion 20 for performing a respiratory action between the inside and outside of the lamp room, and an air blow supply hole (FIG. 4) for blow molding the lamp body / lens unit U. (The insertion hole of the air pipe 84 shown in (b)). Code 28
Indicates an air pipe insertion hole forming portion which is an air blow supply hole constituting the air hole 25.

Further, since the air holes 25 are provided near the boundary between the lamp body portion 20 and the front lens portion 30, the air holes 25 are inconspicuous from the front of the lamp and do not affect the light distribution. That is, since the air hole 50 is not conspicuous through the front lens unit 30 and the air hole 50 is far away from the bulb 16, the presence of the air hole 50 impedes the light distribution and the brightness of the light emitting unit 32 of the front lens unit 30. There is no effect that lowers the

Reference numeral 26 in FIG. 3 denotes a parting line of the blow molding die remaining on the outer surface of the lamp body 20. As will be described later, when the lamp body / lens unit U is blow molded, a mold parting line 26 always remains in the lamp body / lens unit U which is a molded body.
Extends almost along the region between the front lens portion 30 and the lamp body portion 20 which is a region that hardly affects light distribution, and the presence of the parting line 26 does not prevent the formation of an appropriate light distribution. .

Further, the fog lamp 10 shown in this embodiment
Is fixed to the vehicle body by fixing means (not shown) and is accommodated in the bumper 50. An opening 52 is provided on the front surface of the bumper 50 so that the fog lamp 10
The light-emitting portion 32 of the front lens portion 30 is connected to the opening 5 by engaging the constricted portion 24 of the lamp body portion 20 with this opening.
2 is arranged in a form exposed.

Next, a mold apparatus for blow molding the lamp body / lens unit U will be described.

Reference numerals 70a and 70b in FIG.
Are left and right dies that are opposed to each other, and are provided so as to be able to approach and separate from each other by a drive mechanism (not shown), and constitute a die apparatus for blow molding the lamp body / lens unit U.

A molding surface 7 for molding the outer surface of the lamp body / lens unit U is provided on the facing surfaces of the dies 70a and 70b.
2a and 72b are formed. The molding surface 72a is a molding surface mainly for molding the outer surface of the lamp body portion 20 (region above the parting line 26 of the unit U in FIG. 3), and the molding surface 72b is mainly for molding the lens portion 30.
The outer surface of (the area below the parting line 26 of the unit U in FIG. 3) is formed. " In addition, a concave portion 74 for inserting and holding the valve insertion hole constituting member 40 is formed in the molding surface 72a.

Immediately above the opposing molds 70a and 70b,
A parison supply port 80 is provided. From the parison supply port 80, a parison 82 having a flat cylindrical cross section is provided.
Is supplied across the molding surfaces 72a, 72b. An air pipe 84 projects upward from below the mold at a lower position facing the parison supply port 80. Then, the parison 82 hanging from the parison supply port 80 is inserted into the mold 70 as shown in FIGS.
A pinch is performed by a and b, air is blown into the parison 82 from an air pipe 84, and the parison 82 is pressed and adhered to the mold forming surfaces 72a and 72b to be formed.

Next, the procedure for blow molding the lamp body / lens unit U using this mold apparatus will be described.

First, the valve insertion hole constituting member 40 is inserted into the concave portion 74 in the mold 70a, and FIG.
As shown in (a), the dies 70a and 70b are separated from each other to form a parison supply space between the dies 70a and 70b. Next, the parison 82 is extruded by a predetermined length from the supply port 80, and the dies 70a and 70b are approached to pinch the parison 82.

Next, the parison 82 from the air pipe 84
Air is supplied to the inside to inflate the parison 82, and FIG.
As shown in (b), the parison 82 is moved to the mold molding surface 72.
a and 72b. Then, the parison (resin material) at the portion directly facing the groove 44 of the valve insertion hole constituting member 40 is filled in the groove 44 as shown in FIG. At the base of the groove 44 of the valve insertion hole constituting member 40, a plurality of air vent holes 41 are provided at equal intervals in the circumferential direction, and a parison (resin material) is smoothly inserted into the groove 44 during blow molding.
Is filled. Then, the molds 70a and 70b are cooled in this state, and the parison in the molds 70a and 70b is solidified. Thereafter, when the molds 70a and 70b are separated and the molded body W is taken out, a molded body W in which the valve insertion hole constituting member 40 is integrated as shown in FIG. 5 is obtained.

Then, by using a tool such as a cutter, a circular hole 22 is formed in the rear wall of the molded body W so as to match the circular hole 42 of the bulb insertion hole constituting member 40, so that the lamp body portion 2 is formed.
0 is provided with a valve insertion hole 12. Lastly, by removing burrs formed in the pinch seal portion or cutting the air pipe insertion hole forming portion 28 protruding to the side of the lamp body portion 20 to a predetermined length, the lamp body / lens unit U is formed. It is completed.

In the above-described embodiment, the valve insertion hole constituting member 40 is made of synthetic resin, but may be made of metal.

Further, in the above-described embodiment, the valve insertion hole forming member 40 is formed by insert blow molding, so that the valve insertion hole forming member 40 is formed around the periphery of the valve insertion hole 12.
As shown in FIG. 6, a concave portion 71 corresponding to a valve insertion hole constituting member is provided in a mold 70a, and a lamp body formed by blow molding is provided as shown in FIG. -In the peripheral part of the closed bulb insertion hole on the back wall of the lamp body part 20 of the lens unit U,
The bulb insertion hole 12 is formed by forming a cylindrical bulb fixing portion 41 integrally formed with the lamp body portion 20 and forming a circular hole 22 in the closed bulb insertion hole region 21 by post-processing. You may make it.

In the embodiment shown in FIG. 6, the effective reflection surface of the main reflector made of an aluminum vapor-deposited film can be formed near the base 41a of the bulb fixing portion 41, so that the amount of light increases accordingly.

Further, in the above-described embodiment, the description has been given of the fog lamp for the automobile. However, the present invention is not limited to the fog lamp, and can be applied to various headlights and various marker lights.

[0036]

As is clear from the above description, according to the vehicular lamp according to the first aspect, the luminance of the light emitting portion of the lamp is increased, the visibility is improved, and the heat resistance is also improved. Further, since the lamp body and the front lens are formed by a single molding unit, the number of components constituting the lamp is reduced, the lamp structure is simple, and no waterproofing is required, so that the lamp can be provided at a lower cost. According to the second aspect, the luminance of the light emitting portion of the lamp further increases, and accordingly, when the lamp according to the second aspect is applied to the headlight, the visibility in front of the driver is improved. However, when the lamp according to claim 2 is applied to a sign lamp, the visibility of the lamp from a third party is improved. According to the third aspect, since the presence or absence of the parting line of the mold during blow molding hardly affects the light distribution of the lamp, appropriate light distribution can be ensured accordingly. According to the fourth aspect, since the air holes are not conspicuous, the appearance is improved, and the brightness of the lamp does not decrease due to the presence of the air holes. According to claim 5,
Since the light source insertion light can be easily formed, the degree of freedom of the light source insertion hole formation position is high, and it can be applied to various lamps. Claim 6
According to the method, the peripheral portion of the light source insertion hole can be formed in an arbitrary shape having a sufficient thickness as designed, so that the light source can be securely inserted and fixed without rattling in the light source insertion hole.

[Brief description of the drawings]

FIG. 1 is a front view of an automotive fog lamp according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the fog lamp (a line II shown in FIG. 1).
Sectional view along -II)

FIG. 3 is a longitudinal sectional view of the fog lamp (a line III shown in FIG. 1).
Sectional view along -III)

FIG. 4 is a diagram showing a process of molding a lamp body and a lens unit by blow molding.

FIG. 5 shows a lamp body molded by blow molding.
Horizontal sectional view of the lens unit

FIG. 6 is a sectional view of the vicinity of a bulb insertion hole of a lamp body / lens unit which is a main part of an automotive fog lamp according to another embodiment of the present invention

FIG. 7 is a longitudinal sectional view of a conventional lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Fog lamp for automobiles 12 Bulb insertion hole which is a light source insertion hole 16 Bulb which is a light source 18 Aluminum vapor deposition film 18a Main reflector 18b Subreflector 20 Lamp body part which is a lamp body 22 Round hole which constitutes a valve insertion hole 24 Lamp Constriction between body part and front lens part 25 Air hole performing breathing action 26 Parting line of mold 28 Air pipe insertion hole forming part as air blow supply hole 30 Front lens part as front lens 32 Light emitting part 40 Valve insertion Hole component member 42 Circular hole forming valve insertion hole 50 Bumper 70a, 70b Mold for blow molding 84 Air pipe C Valve center d ₁ Vertical width of main reflector d ₂ Vertical width of lamp room space around bulb d ₃ Front on the lamp chamber space in the vertical width d ₄ constricted portion of the light emitting portion of the lens portion Width L optical axis S lamp chamber space U is a molded unit lamp body and lens unit

Claims (6)

[Claims] 1. A container-like lamp body provided with a light source insertion hole, a front lens provided on a front portion of the lamp body, and defining a lamp chamber space in cooperation with the lamp body. A vehicular lamp including a light source inserted into a light source insertion hole and arranged in a lamp room space, and a reflector provided integrally with the lamp body and reflecting light of the light source toward a front lens. The lamp body and the front lens are constituted by a transparent synthetic resin molding unit formed by blow molding and integrated, and the reflector is constituted by a reflection film integrally formed on the rear surface of the lamp body portion of the molding unit. And the width of the lamp chamber space around the light source and the width of the reflector in at least one section including the optical axis is enlarged to be greater than the width of the front lens portion. Dual-purpose lamp. 2. A reflection film which is formed integrally with the outer surface of the lamp body portion and reflects light from the light source toward the light source at a position facing the enlarged lamp room space in the lamp body portion. The vehicular lamp according to claim 1, further comprising a sub-reflector. 3. The vehicle according to claim 1, wherein a parting line of the blow molding die remains in a region other than the light emitting portion forming region of the front lens portion in the molding unit. Lighting fixtures. 4. An air hole for performing a breathing action is provided near a boundary between the lamp body portion and the front lens portion, and the air hole is formed by an air blow supply hole at the time of blow molding. The vehicular lamp according to any one of claims 1 to 3. 5. The light source insertion hole according to claim 1, wherein the light source insertion hole is formed by a hole formed at a predetermined position of a lamp body portion of a blow-molded molding unit by post-processing. 4. The vehicle lighting device according to claim 1. 6. A ring-shaped light source insertion hole constituting member integrated with the molding unit by insert blow molding at a peripheral portion of the light source insertion hole. 5. The vehicle lighting device according to any one of the above items 5.