JP2007242290A - Vehicle lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that there is a case in a conventional vehicle lamp that snow, ice or cloud adhered to a front lens (lens, light transmission cover) can not be melted or removed certainly. <P>SOLUTION: The wire heater 5 installed in the lamp lens 4 comprises a high temperature heat-generating part of a conductive paste 19 with high resistance value and a low temperature heat-generating part of the conductive paste 190 having a low resistance value. As a result, the lamp lens 4 can be warmed corresponding to temperature distribution of the lamp lens 4, thereby the snow, ice, or cloud adhered to the lamp lens 4 can be melted certainly or removed throughout the nearly whole part of the lamp lens 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular lamp in which a lamp lens has a snow melting (ice melting, anti-fogging) structure.

  Conventionally, this type of vehicle lamp is known (for example, Patent Document 1, Patent Document 2, and Patent Document 3). Hereinafter, a conventional vehicle lamp will be described. A conventional vehicular lamp includes a front lens, and a wiring board heater (a conductive foil pattern printed on a base film) joined and integrated with the front lens by insert molding or an adhesive. It is. The conventional vehicle lamp includes a lens and a heating wire printed (or inserted, sandwiched, or bonded) on the lens. Furthermore, the conventional vehicular lamp includes a light transmission cover and a heating body (attached to the light transmission sheet) provided on the light transmission cover.

  Hereinafter, the operation of the conventional vehicle lamp will be described. When power is supplied to a wiring board heater (heating wire, heating element), the wiring board heater (heating wire, heating element) generates heat, and the heat causes snow, ice, or cloudiness attached to the front lens (lens, light transmission cover). Is melted or removed. As a result, loss of light irradiated from the front lens (lens, light transmission cover) can be prevented. In particular, as a light source, a light source having a lower temperature of light irradiated from a front lens (lens, light transmission cover) than a halogen bulb or an incandescent bulb, for example, a semiconductor type light source such as an LED or a discharge lamp such as an HID It is effective in the used vehicle lamp.

  However, since conventional vehicle lamps are simply provided with a wiring board heater (heating wire, heating element) on the front lens (lens, light transmission cover), the wiring board heater (heating wire, heating element) is not provided. The front lens (lens, light transmission cover) is heated at a substantially uniform temperature. On the other hand, in the front lens (lens, light transmission cover), there is a temperature distribution, that is, a high temperature location and a low temperature location. As a result, in the conventional vehicle lamp, when the temperature difference of the temperature distribution of the front lens (lens, light transmission cover) is large, snow or ice attached to the low temperature part of the front lens (lens, light transmission cover) In some cases, the haze cannot be reliably melted or removed.

Japanese Patent Laid-Open No. 10-109587 JP 2002-150812 A JP 2002-166778 A

  The problem to be solved by the present invention is that the conventional vehicular lamp cannot reliably melt or remove the snow, ice or cloudiness adhering to the front lens (lens, light transmission cover). There is in that there is.

  This invention (the invention according to claim 1) is characterized in that the heater provided in the lamp lens has at least a high-temperature heat generating portion and a low-temperature heat generating portion, or has a heat generating portion and a non-heat generating portion. And

  Further, the present invention (invention according to claim 2) is an electric heating member that generates heat by electric resistance when the heater supplies current, and has a high temperature heating part and a low temperature heating part due to a difference in resistance value, Or it has the heat-emitting part and the non-heat-generating part by the presence or absence of resistance value, It is characterized by the above-mentioned.

  Furthermore, the present invention (invention according to claim 3) is a line heater that generates heat by electric resistance when a current is supplied, and has a high-temperature heat generating part and a low-temperature heat generating part due to the density of the line pattern. It is characterized by.

  Furthermore, the present invention (invention according to claim 4) is a line heater that generates heat by electric resistance when the heater supplies current, and the surface of the lamp lens provided with the line heater has anti-fogging function. A sealing coat is applied.

  In the vehicular lamp of the present invention (the invention according to claim 1), the heater has at least a high temperature heat generating portion and a low temperature heat generating portion, or has a heat generating portion and a non-heat generating portion. The lamp lens can be warmed in response to. For example, the low temperature portion of the lamp lens can be warmed by the high temperature heat generating portion or the heat generating portion, while the high temperature portion of the lamp lens can be warmed by the low temperature heat generating portion or kept at the normal temperature by the non-heat generating portion. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) can prevent snow, ice and cloudiness from adhering to the lamp lens even when the temperature difference of the temperature distribution of the lamp lens is large. It is possible to reliably prevent almost all of the above, or it is possible to reliably melt or remove the snow, ice, and cloudiness adhering to the lamp lens over almost all of the lamp lens.

  In addition, since the vehicular lamp according to the present invention (the invention according to claim 1) can warm the lamp lens in accordance with the temperature distribution of the lamp lens, a plurality of light irradiation sections are arranged in the lamp chamber. In a lamp lens with a large temperature distribution difference, such as a vehicular lamp or a vehicular lamp that uses a lamp lens with a large slant angle, so-called snow accretion prevents snow, ice, and cloudiness from adhering to the lamp lens. It is possible to improve the prevention effect, or the so-called snow melting effect of melting or removing snow, ice or clouding adhering to the lamp lens. Moreover, the vehicular lamp according to the present invention (the invention according to claim 1) is a lamp lens having a large temperature distribution difference as described above. By warming in, the snow and ice on the upper part of the lamp lens slide down, and the snow and ice on the lower part of the lamp lens can be slid down.

  In addition, the vehicular lamp according to the present invention (the invention according to claim 2) forms a high temperature heat generating portion and a low temperature heat generating portion due to a difference in the resistance value of the heater, or a heat generating portion depending on the presence or absence of the heater resistance value. Since the heater is formed with a non-heat generating part, the heater structure and heat generation control are simple despite the provision of a high temperature heat generating part and a low temperature heat generating part or a heat generating part and a non-heat generating part in the heater. This can contribute to manufacturing costs.

  In addition, the vehicular lamp according to the present invention (the invention according to claim 2) contributes to power saving since the non-heat generating portion is formed by making the resistance value of the heater approximately zero or approximately zero. Can do.

  Further, in the vehicular lamp of the present invention (the invention according to claim 3), a dense high-temperature heat generating portion of the line pattern is disposed in a portion of the lamp lens that has little influence on light distribution performance and optical influence, A low-temperature heat generating portion having a sparse line pattern can be arranged at a portion of the lamp lens where the influence on the light distribution performance and the optical influence are great. Thereby, the vehicular lamp of this invention (the invention according to claim 3) can minimize the influence on the light distribution performance and the optical influence.

  Furthermore, since the vehicular lamp according to the present invention (the invention according to claim 4) is provided with an anti-fogging and sealing coat on the surface of the lamp lens provided with the line heater, The effect of sealing (protecting) the wire heater is obtained. In addition, since the vehicular lamp according to the present invention (the invention according to claim 4) is provided with an anti-fogging and sealing coat, the coating process can be reduced to one time, and the manufacturing cost accordingly. Can be made cheaper.

  Below, 6 examples of the examples of the vehicular lamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIGS. 1-10 shows Example 1 of the vehicle lamp concerning this invention. Hereinafter, the configuration of the vehicular lamp according to the first embodiment will be described. The vehicular lamp according to the first embodiment is an automotive headlamp 1L, 1R that irradiates a predetermined light distribution pattern, for example, a light distribution pattern for passing. The headlamps 1L and 1R are respectively provided on the left and right sides of the front portion of the automobile C as shown in FIG. Hereinafter, the left headlamp 1L will be described. The right headlamp 1R is substantially opposite to the left and right headlamp 1L.

  As shown in FIGS. 2 and 4, the headlamp 1 </ b> L includes five lamp units 2, a lamp housing 3, a lamp lens 4, a line heater 5, and a power feeding unit 6. A lamp chamber 7 is defined by the lamp housing 3 and the lamp lens 4. In the lamp chamber 7, the five lamp units 2 are arranged in two upper and lower stages (in this example, two in the upper stage and three in the lower stage).

  The lamp unit 2 constitutes a light irradiation unit that irradiates light to the outside through the lamp lens 4. The lamp unit 2 irradiates (radiates and emits) a predetermined light distribution pattern, in this example, a light distribution pattern for passing. As shown in FIG. 3, the lamp unit 2 is a projector type and has a unit structure. The lamp unit 2 includes an upper reflector 8 and a lower reflector 9, a reflecting surface 10 and a shade 11, a semiconductor light source 12, a projection lens (convex lens, condenser lens) 13, and a heat sink member 14. ing.

  The lamp unit 2 is attached to the lamp housing 3 via a holder member 15. The lamp housing 3 is provided with a heat sink member 16. The heat sink member 16 on the lamp housing 3 side and the heat sink member 14 on the lamp unit 2 side are connected via the holder member 15 and the lamp housing 3. Thereby, the heat generated in the semiconductor light source 12 is released to the outside through the heat sink member 14, the holder member 15, the lamp housing 3, and the heat sink member 16.

  As the semiconductor-type light source 12, for example, a self-luminous semiconductor-type light source (LED in this embodiment 1) such as LED and EL (organic EL) is used. For this reason, although heat is generated in the semiconductor light source 12 itself, almost no heat is generated in the light from the semiconductor light source 12. As a result, snow, ice, or cloudiness tends to adhere to the lamp lens 4.

  The lamp lens 4 is a substantially transparent lens, and is a so-called outer cover (outer lens). In this example, the lamp lens 4 is molded from a synthetic resin such as PC (polycarbonate). The lamp lens 4 is slanted (inclined) from the rear to the front from the top to the bottom in the longitudinal section (vertical section). When the material of the lamp lens 4 is PC, the heat resistant temperature of the lamp lens 4 is about 130 ° C.

  The line heater 5 is a transfer type line heater, and is provided on the inner surface of the lamp lens 4 by transfer. As shown in FIG. 6, the line heater 5 provided on the inner surface of the lamp lens 4 is composed of a base film 17, an adhesive 18, a conductive paste 19, and a resist 20. Yes. The line heater 5 is preferably light transmissive.

  The base film 17 is made of a transparent synthetic resin film such as PET (polyethylene terephthalate). The adhesive 18 is provided on one surface of the base film 17.

  On the other surface of the base film 17, the conductive pastes 19 and 190 are formed in a line pattern. In this example, as shown in FIGS. 4 and 10, the line pattern of the conductive pastes 19 and 190 is a line pattern in which six horizontal lines that are substantially parallel to each other are continuously zigzag to the left and right. Two terminal portions are formed by continuous vertical lines from two horizontal lines. The conductive pastes 19 and 190 are conductive inks, and in this example, are made of a metal paste such as a silver paste, a gold paste, a copper paste, and an aluminum paste. The conductive pastes 19 and 190 generate heat due to the electrical resistance of the conductive paste when a current is supplied. The generated heat amount is high when the electrical resistance value is high, and is generated when the electrical resistance value is low. The amount of heat is low.

  As shown in FIG. 4, the conductive pastes 19 and 190 include a high-resistance conductive paste 19 and a low-resistance conductive paste 190. The high-resistance conductive paste 19 is provided from the upper part to the middle part of the lamp lens 4 as indicated by a normal solid line in FIG. On the other hand, the low-resistance conductive paste 190 is provided from the middle part to the lower part of the lamp lens 4 as shown by the thick solid line in FIG. The resistance value of the conductive paste 19 having a high resistance value and the conductive paste 190 having a low resistance value are determined depending on the size of the cross-sectional area and the material. As a result, the line heater 5 provided in the lamp lens 4 has a high temperature heat generating portion of the high resistance conductive paste 19 and a low temperature heat generating portion of the low resistance conductive paste 190. .

  The resist 20 is provided on the other surface of the base film 17 so as to cover the conductive pastes 19 and 190. The resist 20 electrically insulates the conductive pastes 19 and 190 and protects them from external impacts. That is, the resist 20 is a surface protective coat of the conductive pastes 19 and 190. In this example, the resist 20 is made of urethane or acrylic adhesive.

  The base film 17 (including the adhesive 18 in this example) is cut into a pattern following the line pattern of the conductive pastes 19 and 190. The width W of the cut base film 17 is about 0.5 mm in this example, and is substantially the same as the width of the resist 20. Then, after the base film 17 is cut, the separator 21 disposed on the resist 20 side is used to adhere the adhesive 18 to the inner surface of the lamp lens 4 to form the conductive paste 19 having a line pattern. , 190 are transferred to the inner surface of the lamp lens 4. Thereby, the line heater 5 is provided on the inner surface of the lamp lens 4 by transfer.

  The separator 21 is peeled off from the resist 20 side after the conductive paste 19 and 190 having a line pattern is transferred to the inner surface of the lamp lens 4. As shown in FIG. 10, the separator 21 can place the line heater 5 having a pattern shape following the line pattern of the conductive pastes 19 and 190, and the inner surface of the lamp lens 4. The sheet has a size and shape that can be transferred. The separator 21 uses a flexible material, in this example, a rubber-based material such as urethane so as to follow the curved surface of the inner surface of the lamp lens 4.

  Hereinafter, the manufacturing process of the lamp lens 4 of the headlamps 1L and 1R of the vehicular lamp according to the first embodiment will be described with reference to FIG. First, the sheet member 23 is manufactured by providing the adhesive (adhesive layer) 18 on one surface of the base film 17 and releasably bonding a release sheet 22 such as a release film or release paper to the adhesive 18. (See FIG. 9A). The sheet member 23 has such a size that the line heater 5 having a pattern shape following the line pattern of the conductive pastes 19 and 190 can be formed.

  Next, the conductive pastes 19 and 190 are printed on the other surface (upper surface) of the base film 17 of the sheet member 23 by a method such as screen printing or hot stamp printing to form a line pattern ( (See FIG. 9B).

  Subsequently, the resist (insulating layer / protective film) 20 is printed on the other surface (upper surface) of the base film 17 of the sheet member 23 by a method such as screen printing or hot stamp printing. It is provided so as to cover the pastes 19 and 190 (see FIG. 9C).

  Then, the base film 17 and the adhesive 18 of the sheet member 23 are cut into a pattern following the line pattern of the conductive pastes 19 and 190, for example, by punching (see FIG. 9D). That is, a cutter (not shown) is pushed into the base film 17 and the adhesive 18 from the resist 20 side and stopped at the boundary between the adhesive 18 and the release sheet 22, and the base film 17 and the adhesive 18. To cut. Note that, in FIG. 9C, a cut line of the base film 17 and the adhesive 18 is indicated by a solid line CL. The cutter is separated from the sheet member 23 and, in the cut base film 17 and the adhesive 18, an extra portion other than a portion of the pattern following the line pattern of the conductive pastes 19 and 190 is peeled off. Remove from sheet 22.

  As a result, as shown in FIG. 9D, the base film 17 cut in a pattern following the release sheet 22 of the sheet member 23 not cut and the line pattern of the conductive pastes 19 and 190. Then, the adhesive 18, the conductive pastes 19 and 190 in a line pattern, and the resist 20 provided in a pattern following the line pattern of the conductive pastes 19 and 190 are left. In this example, the cut width W of the base film 17 and the adhesive 18 is substantially the same as the width of the resist 20, and the width that the resist 20 can cover the conductive pastes 19 and 190. That is, the resist 20 has a width that can seal the conductive pastes 19 and 190 to electrically insulate them and protect them from impact from the outside.

  Then, after the base film 17 and the adhesive 18 of the sheet member 23 are cut with a pattern following the line pattern of the conductive pastes 19 and 190, the separator 21 is disposed on the resist 20 side (FIG. 9). (See (E)). Thus, as shown in FIG. 10, the release sheet 22 of the sheet member 23 that has not been cut, the base film 17 that has been cut in a pattern that follows the line pattern of the conductive pastes 19 and 190, and the adhesion The agent 18, the conductive paste 19, 190 in a line pattern, and the resist 20 provided in a pattern following the line pattern of the conductive paste 19, 190 are placed on the separator 21 on the resist 20 side. It is placed face down. As a result, a line heater unit is manufactured. The line heater unit includes the line heater 5 including the base film 17, the adhesive 18, the conductive pastes 19 and 190, and the resist 20, and the release sheet of the separator 21 and the sheet member 23. 22.

  Next, the release sheet 22 of the wire heater unit manufactured as described above is peeled off (see FIG. 9F). Then, using the separator 21 disposed on the resist 20 side, the adhesive 18 is adhered to the inner surface of the lamp lens 4, and the conductive paste 19, 190 having a line pattern is applied to the inner surface of the lamp lens 4. Transfer is performed (see FIG. 9G). Then, the separator 21 is peeled off from the resist 20. As a result, as shown in FIGS. 4 to 6, the lamp lens 4 in which the line heater 5 is provided on the inner surface by transfer is manufactured.

  As described above, the wire heater 5 provided on the inner surface of the lamp lens 4 by transfer is provided with the power feeding section 6 as shown in FIGS. The power feeding unit 6 supplies current to the wire heater 5.

  That is, the two terminal portions of the line heater 5 are provided with power feeding pattern portions 24 and 24, respectively. The two power feeding pattern portions 24 and 24 are provided integrally with the conductive paste 19 and 190. That is, the two power supply pattern portions 24 and 24 are formed simultaneously when the conductive pastes 19 and 190 are formed on the other surface of the base film 17 of the sheet member 23 by printing or the like. is there. Therefore, the two power supply pattern portions 24 and 24 are conductive inks similar to the conductive pastes 19 and 190, and in this example, silver paste, gold paste, copper paste, aluminum paste, etc. Made of metal paste.

  The resist 20 is not provided in the two power supply pattern portions 24 and 24. This is to prevent the insulating resist 20 from hindering the electrical connection between the two power supply pattern portions 24 and 24 and the surface mount type (SMT) connector 25. . The two power supply pattern portions 24, 24 are provided with the surface mount type connector 25 and are electrically connected thereto. A lens-side connector 27 is electrically connected to the surface mount type connector 25 via a harness 26. The lens-side connector 27 is fixed to the side wall 28 of the lamp lens 4.

  On the other hand, the lamp housing 3 is provided with a connector 29 on the housing side. A harness 30 is electrically connected to the connector 29 on the housing side. The harness 30 is electrically connected to a power supply (not shown) side. As a result, when the lens-side connector 27 and the housing-side connector 29 are electrically connected, a current can be supplied to the line heater 5. The two power supply pattern portions 24, 24, the surface mount type connector 25, the harness 26, the lens side connector 27, the housing side connector 29, and the harness 30 include the power supply. Part 6 is configured. The harness 26 of the lens-side connector 27 may be directly electrically connected to the two power supply pattern portions 24 and 24 without using the surface mount type connector 25. Further, the power supply unit 6 is provided at a place where the influence on the design of the lamp lens 4 is small.

  The line heater 5 is connected to a manual switch (not shown) or an automatic switch (not shown) via the power supply unit 6. The manual switch manually turns on / off the current supply to the line heater 5. The automatic switch automatically turns on / off the current supply to the line heater 5.

  The automatic switch includes a control unit such as an ECU and a detection unit such as a temperature sensor or an optical sensor. The detection unit detects the ambient environment of the vehicle C, for example, the temperature outside the vehicle C, the light emitted from the lamp lens 4, and outputs the detection signal to the control unit. The control unit determines whether or not snow, ice, or cloudiness is attached to the lamp lens 4 based on a detection signal from the detection unit, or snow, ice, or cloudy is attached to the lamp lens 4. Judge whether the temperature is about. When the controller determines that the lamp lens 4 has snow, ice, cloudy, or the like, or the temperature of the lamp lens 4 has snow, ice, cloudy, or the like, A current is supplied to the wire heater 5 through the power feeding unit 6. On the other hand, when the control unit determines that the lamp lens 4 is not covered with snow, ice, or cloudy or the temperature is not such that snow, ice, or cloudy is attached to the lamp lens 4, the power supply is performed. The current supply to the wire heater 5 is cut off via the section 6.

  A temperature control unit 31 is provided at one terminal portion of the wire heater 5. The temperature control unit 31 controls the heat generation temperature of the conductive pastes 19 and 190. As the temperature control unit 31, for example, a PTC thermistor is used. This PTC thermistor has a characteristic that its resistance value increases as the temperature rises, and current does not flow when it reaches a predetermined resistance value. For example, when the material of the lamp lens 4 is PC, the heat resistant temperature of the lamp lens 4 is about 130 ° C. Therefore, when the heat generation temperature of the conductive pastes 19 and 190 reaches about 60 ° C. A PTC thermistor having a resistance characteristic that prevents current from flowing is used as the temperature controller 31.

  At least one of the base film 17 and the resist 20 is colored. That is, a colored layer is provided on one side or the other side of the base film 17. Alternatively, the base film 17 itself or the resist 20 itself is colored.

  The vehicular lamp according to the first embodiment is configured as described above, and the operation thereof will be described below.

  The semiconductor light sources 12 of the five lamp units 2 are turned on. Then, the light from the semiconductor-type light sources 12 of the five lamp units 2 is reflected by the reflecting surface 10 of the upper reflector 8, and a part of the reflected light is cut off by the shade 11 of the lower reflector 9, and the remaining reflections Light passes through the projection lens 13 and the lamp lens 4 and is irradiated with a predetermined light distribution pattern having a cutoff line outside, that is, a light distribution pattern for passing. The cut-off line of the light distribution pattern for passing is formed by the edge of the shade 11. In addition, by providing the shade 11 with the reflection surface, it is possible to use the reflection light reflected from the reflection surface 10 and reflected by the reflection surface of the shade 11.

  Here, since the line heater 5 provided for the transfer to the lamp lens 4 has a linear pattern, when light passes through the lamp lens 4, the light loss and the influence of light distribution are minimized. Can be suppressed. Moreover, since the lamp unit 2 using the semiconductor-type light source 12 as a light source is used, the width of light emitted from the lamp unit 2 is small. For this reason, the light loss, the influence of light distribution, etc. can be further prevented by passing light having a small width between the linear patterns of the line heater 5.

  And since almost no heat is generated in the light from the semiconductor-type light source 12, snow, ice, or cloudiness tends to adhere to the lamp lens 4. In this case, a current is supplied to the line heater 5 provided to the lamp lens 4 by transfer by a manual switch or an automatic switch.

  When a current is supplied to the line heater 5, the line heater 5 generates heat due to the electric resistance of the line heater 5. The heat generated by the wire heater 5 warms the lamp lens 4 and prevents the snow, ice and cloudiness from adhering to the lamp lens 4, or the snow, ice and cloudiness adhering to the lamp lens 4 are melted. Is removed or removed. As a result, loss of light emitted from the lamp lens 4 can be prevented.

  At this time, since the heat generation temperature of the high-resistance conductive paste 19 is higher than the heat generation temperature of the low-resistance conductive paste 190, the upper portion of the lamp lens 4 on which the high-resistance conductive paste 19 is disposed. The temperature from the intermediate portion to the intermediate portion is higher than the temperature from the intermediate portion to the lower portion of the lamp lens 4 on which the low-resistance conductive paste 190 is disposed. For this reason, the snow and ice adhering from the upper part to the middle part of the lamp lens 4 are concentrated and melted to slide on the surface of the lamp lens 4. Due to the melting phenomenon of snow and ice melted (so-called avalanche phenomenon), the snow and ice adhering from the middle part to the lower part of the lamp lens 4 are caused by the load of the melted snow and ice. It slides on the surface of the lamp lens 4 or is dropped from the surface of the lamp lens 4. As a result, snow and ice are removed from the surface of the lamp lens 4 and loss of light irradiated from the lamp lens 4 can be prevented.

  When the heat generation temperature of the line heater 5 reaches a predetermined temperature during the heat generation action of the line heater 5, the current control to the line heater 5 is controlled by the temperature control action of the temperature control unit 31, and the heat generation temperature of the line heater 5 is controlled. Is maintained near a predetermined temperature. As a result, the resin lamp lens 4 having a relatively low heat-resistant temperature can be protected from overheating.

  It is possible to prevent the snow, ice and cloudiness from adhering to the lamp lens 4, and when the snow, ice and cloudiness adhering to the lamp lens 4 are melted or removed, a manual switch and / or an automatic switch can be used. The current supply to the line heater 5 provided in the lens 4 is cut off.

  While the semiconductor type light sources 12 of the five lamp units 2 are respectively lit, the heat generated in the semiconductor type light sources 12 is externally transmitted through the heat sink member 14, the holder member 15, the lamp housing 3, and the heat sink member 16 of the lamp unit 2. To be released.

  The vehicular lamp according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp according to the first embodiment, the wire heater 5 includes the high-temperature heating portion of the conductive paste 19 having a high resistance value and the low-temperature heating portion of the conductive paste 190 having a low resistance value. The lamp lens 4 can be warmed corresponding to the temperature distribution of 4. For example, the low temperature portion of the lamp lens 4 can be warmed by the high temperature heating portion of the conductive paste 19 having a high resistance value, while the high temperature portion of the lamp lens 4 can be warmed by the low temperature heating portion of the conductive paste 190 having a low resistance value. . As a result, in the vehicular lamp according to the first embodiment, even when the temperature difference of the temperature distribution of the lamp lens 4 is large, snow, ice, or cloudiness adheres to the lamp lens 4 almost as much as the lamp lens 4. It can be reliably prevented over the entire surface, or snow, ice and cloudiness adhering to the lamp lens 4 can be reliably melted and removed over almost the entire lamp lens 4.

  In particular, the vehicular lamp according to the first embodiment includes a lamp lens 4 in which five lamp units 2 are arranged in a lamp chamber 7 and the slant angle is large as shown in FIGS. The vehicle lamp to be used is a vehicle lamp having a large temperature difference in the temperature distribution of the lamp lens 4. However, since the vehicular lamp according to the first embodiment can warm the lamp lens 4 in accordance with the temperature distribution of the lamp lens 4, even if the lamp lens 4 has a large temperature difference, A so-called snow-preventing effect for preventing the lens 4 from adhering to snow, ice, or cloudiness, or a so-called snow-melting effect for melting or removing snow, ice, or clouding that adheres to the lamp lens 4. Can be improved. Moreover, the vehicular lamp according to the first embodiment has a high resistance conductive property from the upper part to the middle part in the lamp lens 4 in the lamp lens 4 having a large temperature difference in the temperature distribution as described above. Since the hot paste is heated by the high temperature heat generating portion of the adhesive paste 19, the snow and ice from the upper part to the middle part of the lamp lens 4 slide down, and the snow and ice from the middle part to the lower part of the lamp lens 4 can be slid down.

  In addition, the vehicular lamp according to the first embodiment forms the high temperature heat generating portion and the low temperature heat generating portion by the difference in the resistance value of the conductive pastes 19 and 190 of the line heater 5. Despite the provision of the high temperature heat generating part and the low temperature heat generating part, the structure and heat generation control of the wire heater 5 are simple, which can contribute to the manufacturing cost.

  Further, in the vehicular lamp according to the first embodiment, the adhesive 18 provided on one surface of the base film 17 is adhered to the lamp lens 4 so that the line pattern formed on the other surface of the base film 17 is electrically conductive. The conductive pastes 19 and 190 are transferred to the lamp lens 4. For this reason, the vehicular lamp according to the first embodiment does not require a special mold as compared with a vehicular lamp in which a conductive pattern is integrated with a lamp lens by insert molding. It can be made cheap.

  Furthermore, in the vehicular lamp according to the first embodiment, the base film 17 is cut into a pattern following the line pattern of the conductive pastes 19 and 190, and the separator 21 disposed on the resist 20 side is used. The conductive pastes 19 and 190 are transferred to the lamp lens 4. That is, in the vehicular lamp according to the first embodiment, the linear base film 17 is bonded to the lamp lens 4, so that the linear base film 17 is bonded like the vehicular lamp that bonds the sheet-shaped base film to the lamp lens. There is no fear that the film 17 will be distorted or wrinkled. Therefore, in the vehicular lamp according to the first embodiment, there is no case where distortion or wrinkle is generated in the conductive pastes 19 and 190 of the line pattern formed on the linear base film 17, and the conductive of the line pattern is not generated. The conductive pastes 19 and 190 can be transferred to the lamp lens 4 reliably and accurately.

  Furthermore, since the vehicular lamp according to the first embodiment transfers the conductive pastes 19 and 190 having a line pattern to the lamp lens 4, the line pattern can be used as a design line. The design effect can be improved.

  Furthermore, since the vehicular lamp according to the first embodiment transfers the conductive pastes 19 and 190 in a line pattern to the lamp lens 4, it is larger than the production of the ITO film heater, such as a vacuum deposition machine. A long vapor deposition process with no equipment or tact is unnecessary, and the manufacturing cost can be reduced accordingly.

  Furthermore, the vehicular lamp according to the first embodiment is versatile in terms of the shape and dimensions of the conductive pastes 19 and 190 to be transferred to the lamp lens 4, that is, the line patterns of the transfer-type conductive pastes 19 and 190. By adopting it, it can be used for the lamp lens 4 of a wide variety of vehicle lamps.

  Furthermore, since the vehicular lamp according to the first embodiment transfers the conductive pastes 19 and 190 of the line pattern to the lamp lens 4, it can be made differently in manufacturing management of the lamp lens 4 with and without the heater. It is easy, and the production line and inventory management can be simplified.

  Furthermore, in the vehicular lamp according to the first embodiment, it is easy to manufacture the line heater 5 including the base film 17, the adhesive 18, the conductive pastes 19 and 190 having a line pattern, and the resist 20. Further, it is easy to manufacture the lamp lens 4 formed by transferring the line heater 5. As a result, it is possible to quickly and easily meet the needs (design and design) of the various line patterns of the conductive line paste 19 to be transferred to the lamp lens 4 of various vehicle lamps.

  Furthermore, since the vehicular lamp according to the first embodiment has at least one of the base film 17 and the resist 20 colored, the design effect of the lamp lens 4 can be further improved. In addition, the degree of freedom in designing the lamp lens 4 is increased. Moreover, the vehicular lamp according to the first embodiment can protect the conductive pastes 19 and 190 from the influence of ultraviolet rays, heat, and the like by coloring at least one of the base film 17 and the resist 20. it can.

  Furthermore, since the vehicular lamp according to the first embodiment is provided with the temperature control unit 31 that controls the heat generation temperature of the conductive pastes 19 and 190, the temperature for heating the lamp lens 4 can be appropriately controlled. Even if a resin lens having a low heat-resistant temperature is used as the lamp lens 4, there is no influence or problem.

  Furthermore, the vehicular lamp according to the first embodiment uses the separator 21 to transfer the conductive pastes 19 and 190 to the inner surface of the lamp lens 4, and the separator 21 is a curved surface of the lamp lens 4. Therefore, the conductive paste 19 can be sufficiently transferred to the lamp lens 4 so as to follow the curved surface of the lamp lens 4. As a result, the vehicular lamp according to the first embodiment can easily cope with the curved surface, shape, and large size of the lamp lens 4, and the degree of freedom in designing the line pattern of the conductive pastes 19 and 190 is increased. .

  11 and 12 show a second embodiment of the vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 10 denote the same components. Hereinafter, the vehicular lamp according to the second embodiment will be described.

  In the vehicular lamp according to the second embodiment, as shown in FIG. 11, two sets of line heaters 5 each having a line pattern in which four horizontal lines are zigzag continuous left and right are transferred to the lamp lens 4 in the vertical direction. It is what has been. The upper line heater 5 is a high-temperature heat generating portion made of a low-resistance conductive paste 19 ', while the lower line heater 5 is a low-temperature heat generating portion made of a high-resistance conductive paste 190'. . The wire heater 5 of the high-temperature heat generation part and the line heater 5 of the low-temperature heat generation part are connected in parallel to the power supply unit 6.

  As shown in FIG. 12, the line heater 5 of the high-temperature heat generating part made of the low-resistance conductive paste 19 'and the line heater 5 of the low-temperature heat generating part made of the high-resistance conductive paste 190' Module parts that can be combined. That is, the line heater 5 of the high-temperature heat generating part and the line heater 5 of the low-temperature heat generating part are composed of a line pattern in which the upper and lower four horizontal lines are zigzag left and right, and one or a plurality of sets of the line patterns are formed. The line heater 5 of the high-temperature heat generating part and one or a plurality of sets of the line heater 5 of the low-temperature heat generating part are provided on the lamp lens 4 by transfer using a separator 21. In FIG. 11, a pair of the low-temperature heat generating part and the line heater 5 as well as the pair of high-temperature heat generating parts are provided on the lamp lens 4 by transfer using a separator 21. It is illustrated.

  In the vehicular lamp according to the second embodiment, a line heater 5 of a high-temperature heat generating portion made of a low-resistance conductive paste 19 ′ is provided on the upper portion of the lamp lens 4, and a high resistance value is provided on the lower portion of the lamp lens 4. Since the line heater 5 of the low-temperature heat generating portion made of the conductive paste 190 ′ is provided, substantially the same effect as the vehicle lamp of the first embodiment can be achieved. That is, the vehicular lamp according to the second embodiment includes a line heater 5 of a high-temperature heat generating portion made of a low-resistance conductive paste 19 'and a line heater of a low-temperature heat generating portion made of a high-resistance conductive paste 190'. Therefore, the lamp lens 4 can be warmed in accordance with the temperature distribution of the lamp lens 4. As a result, in the vehicular lamp according to the second embodiment, even when the temperature difference of the temperature distribution of the lamp lens 4 is large, snow, ice, or cloudiness adheres to the lamp lens 4 almost as much as the lamp lens 4. It can be reliably prevented over the entire surface, or snow, ice and cloudiness adhering to the lamp lens 4 can be reliably melted and removed over almost the entire lamp lens 4.

  In particular, as shown in FIG. 11, the vehicular lamp according to the second embodiment is a vehicle in which five lamp units 2 are arranged in the lamp chamber 7 and a lamp lens 4 having a large slant angle is used. This is a vehicular lamp that has a large temperature difference in the temperature distribution of the lamp lens 4. However, since the vehicular lamp according to the second embodiment can warm the lamp lens 4 in accordance with the temperature distribution of the lamp lens 4, even if the lamp lens 4 has a large temperature difference, A so-called snow-preventing effect for preventing the lens 4 from adhering to snow, ice, or cloudiness, or a so-called snow-melting effect for melting or removing snow, ice, or clouding that adheres to the lamp lens 4. Can be improved. In addition, the vehicular lamp according to the second embodiment has a low resistance conductive property from the upper part to the middle part in the lamp lens 4 in the lamp lens 4 having a large temperature difference of the temperature distribution as described above. Since the hot paste is heated at the high temperature heat generating portion 19 ', the snow and ice from the upper part to the middle part of the lamp lens 4 slide down, and the snow and ice from the middle part to the lower part of the lamp lens 4 can be slid down.

  Further, the vehicular lamp according to the second embodiment has a line heater 5 of a high temperature heat generating portion made of a low resistance conductive paste 19 'and a line heater 5 of a low temperature heat generating portion made of a high resistance conductive paste 190'. Is a module component that can be combined in a plurality of ways, for example, by forming a set of high-temperature heat generating portion of the line heater 5 and a set of low-temperature heat generating portion of the line heater 5 into a small-sized and general-purpose module. Corresponding to the shape and dimensions of the lamp lens 4, the conductive paste 19 ′ of the line heater 5 in the high temperature heat generating portion and the conductive paste 190 ′ of the line heater 5 in the low temperature heat generating portion can be transferred to the lamp lens 4. .

  13 and 14 show a third embodiment of a vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 12 denote the same components. Hereinafter, the vehicular lamp according to the third embodiment will be described.

  In the vehicular lamp according to the third embodiment, as shown in FIGS. 13 and 14, the line pattern of the conductive paste 19 is a line pattern in which upper and lower horizontal lines that are substantially parallel to each other are zigzag continuously from side to side. The upper and lower six horizontal lines are sparse line pattern portions 19A and the upper and lower six horizontal lines are dense line pattern portions 19B. That is, a sparse line pattern portion 19A is disposed from approximately the center to the lower portion of the lamp lens 4, and conversely, a dense line pattern portion 19B is disposed substantially at the upper portion of the lamp lens 4. The sparse line pattern portion 19 </ b> A disposed from approximately the center to the lower portion of the lamp lens 4 constitutes a low-temperature heat generating portion of the line heater 5, and conversely, a dense line disposed approximately at the upper portion of the lamp lens 4. The pattern part 19 </ b> B constitutes a high temperature heat generating part of the wire heater 5.

  In the vehicular lamp according to the third embodiment, three lamp units 2 are arranged in the upper stage, and two lamp units 2 are arranged in the lower stage. Of the dense line pattern portion 19B substantially above the lamp lens 4, the lower 2-3 horizontal line patterns are positioned slightly above the upper three lamp units 2.

  In the vehicular lamp according to the third embodiment, the dense line pattern portion 19B of the high-temperature heat generating portion of the line heater 5 is disposed substantially above the lamp lens 4, while the low-temperature heat generating portion of the line heater 5 is sparse. Since the line pattern portion 19A is arranged from the substantially central portion to the lower portion of the lamp lens 4, it is possible to achieve substantially the same function and effect as the vehicular lamp of the first and second embodiments. That is, in the vehicular lamp according to the third embodiment, the line heater 5 includes the high-temperature heat generating portion including the dense line pattern portion 19B and the low-temperature heat generating portion including the sparse line pattern portion 19A. The lamp lens 4 can be warmed corresponding to the temperature distribution of 4. As a result, in the vehicular lamp according to the third embodiment, even when the temperature difference of the temperature distribution of the lamp lens 4 is large, snow, ice, or cloudiness adheres to the lamp lens 4 almost as much as the lamp lens 4. It can be reliably prevented over the entire surface, or snow, ice and cloudiness adhering to the lamp lens 4 can be reliably melted and removed over almost the entire lamp lens 4.

  In particular, in the vehicular lamp according to the third embodiment, as shown in FIGS. 13 and 14, a lamp lens 4 having five lamp units 2 arranged in the lamp chamber 7 and having a large slant angle is provided. The vehicle lamp to be used is a vehicle lamp having a large temperature difference in the temperature distribution of the lamp lens 4. However, since the vehicular lamp according to the third embodiment can warm the lamp lens 4 in accordance with the temperature distribution of the lamp lens 4, even if the lamp lens 4 has a large temperature difference in the temperature distribution, this lamp A so-called snow-preventing effect for preventing the lens 4 from adhering to snow, ice, or cloudiness, or a so-called snow-melting effect for melting or removing snow, ice, or clouding that adheres to the lamp lens 4. Can be improved. Moreover, the vehicular lamp according to the third embodiment has a dense line pattern portion from the upper portion to the middle portion in this example in the lamp lens 4 in the lamp lens 4 having a large temperature difference in the temperature distribution as described above. Since it is warmed by the high-temperature heat generating portion 19B, snow and ice from the upper part to the middle part of the lamp lens 4 slide down, and snow and ice from the middle part to the lower part of the lamp lens 4 can be slid down.

  In the vehicular lamp according to the third embodiment, the dense line pattern portion 19B of the conductive paste 19 is disposed almost at the upper portion of the lamp lens 4 that does not affect the light distribution performance. Since the 19 sparse line pattern portions 19A are arranged from the substantially central portion to the lower portion of the main light emitting portion of the lamp lens 4, the influence on the light distribution performance can be minimized.

  Further, since the vehicular lamp according to the third embodiment uses the transfer type line heater 5 for transferring the conductive paste 19 having a line pattern to the lamp lens 4, the upper and lower 12 lamps are substantially parallel to each other. The horizontal line is a line pattern that is zigzag continuous left and right, and comprises a sparse line pattern portion 19A of upper and lower six horizontal lines and a dense line pattern portion 19B of upper and lower horizontal lines The conductive paste 19 can be easily formed.

  15 and 16 show a fourth embodiment of a vehicle lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 14 denote the same components. Hereinafter, the vehicular lamp according to the fourth embodiment will be described.

  The vehicle lamp according to the fourth embodiment is a modification of the vehicle lamp according to the third embodiment. In the vehicular lamp according to the fourth embodiment, as shown in FIG. 15 and FIG. 16, the line pattern of the conductive paste 19 is a line pattern in which twelve horizontal lines that are substantially parallel to each other are zigzagged to the left and right. The upper and lower four horizontal lines are sparse line pattern portions 19A, and the upper and lower horizontal lines are dense line pattern portions 19B. That is, the upper and lower four horizontal lines of dense line pattern portions 19B and the upper and lower two horizontal lines of sparse line pattern portions 19A are configured in two upper and lower stages.

  The upper and lower four horizontal dense line pattern portions 19B correspond to the upper part of the upper three lamp units 2 and the upper part of the lower two lamp units 2 in the lamp lens 4. It is arranged in the place to do. On the other hand, the sparse line pattern portion 19A of two horizontal lines on the upper and lower sides of the lamp lens 4 corresponds from the center portion to the lower portion of the upper three lamp units 2 and the lower two lamp units 2. It arrange | positions to the location corresponding from the center part to the lower part, respectively.

  In the vehicular lamp according to the fourth embodiment, the dense line pattern portion 19B of the high-temperature heat generating portion of the line heater 5 corresponds to the upper part of the upper and lower five lamp units 2 of the lamp lens 4, that is, the upper portion. On the other hand, the sparse line pattern portion 19A of the low-temperature heat generating portion of the line heater 5 corresponds to the portion corresponding to the center of the five lamp units 2 in the upper and lower two stages of the lamp lens 4 from the lower portion. It is arranged on the lower side. For this reason, the vehicular lamp according to the fourth embodiment can achieve substantially the same function and effect as the vehicular lamp of the first, second, and third embodiments. That is, in the vehicular lamp according to the fourth embodiment, the line heater 5 includes the high-temperature heat generating portion including the dense line pattern portion 19B and the low-temperature heat generating portion including the sparse line pattern portion 19A. The lamp lens 4 can be warmed corresponding to the temperature distribution of 4. As a result, in the vehicular lamp according to the fourth embodiment, even when the temperature difference of the temperature distribution of the lamp lens 4 is large, snow, ice, or cloudiness adheres to the lamp lens 4 almost like the lamp lens 4. It can be reliably prevented over the entire surface, or snow, ice and cloudiness adhering to the lamp lens 4 can be reliably melted and removed over almost the entire lamp lens 4.

  In the vehicle lamp according to the fourth embodiment, a projector-type lamp unit that irradiates a light distribution pattern for passing as the lamp unit 2 is used. In the projector-type lamp unit 2 that irradiates the light distribution pattern for passing, the upper portion of the effective light emitting surface (effective irradiation surface) has a small optical influence, while the lower portion has a large optical influence. As a result, in the vehicular lamp according to the fourth embodiment, the dense line pattern portion 19B of the conductive paste 19 is arranged on the upper side of the lamp unit 2 having a small optical influence among the lamp lenses 4, Since the sparse line pattern portion 19A of the conductive paste 19 is disposed on the lower side of the lamp unit 2 having a large optical influence in the lamp lens 4, the optical influence can be minimized.

  Further, since the vehicular lamp according to the fourth embodiment uses the transfer type line heater 5 that transfers the conductive paste 19 having a line pattern to the lamp lens 4, the upper and lower 12 lamps are substantially parallel to each other. The horizontal line is a line pattern that is zigzag continuous left and right, and is composed of a sparse line pattern portion 19A of upper and lower four horizontal lines and a dense line pattern portion 19B of upper and lower horizontal lines The conductive paste 19 can be easily formed.

  FIG. 17 shows a fifth embodiment of a vehicle lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 16 denote the same components. Hereinafter, the vehicular lamp according to the fifth embodiment will be described.

  In the vehicular lamp according to the fifth embodiment, the line heater 5 provided on the lamp lens 4 by transfer has a heat generating portion and a non-heat generating portion. The heat generating portion is a portion formed of a conductive paste 19 in the line heater 5 as shown by a solid line in FIG. On the other hand, the non-heat generating portion is a portion formed of a metal wire (or metal foil) 32 in the wire heater 5 as indicated by a broken line in FIG. The heating part of the conductive paste 19 in the wire heater 5 is a low temperature spot in the lamp lens 4 or a spot where the light distribution effect or the optical influence due to snow, ice or cloudiness attached to the lamp lens 4 is large. Etc. are arranged. On the other hand, the non-heat-generating part of the metal wire 32 in the wire heater 5 is affected by light distribution and optical influences due to high temperature spots in the lamp lens 4 or snow, ice, or cloudiness attached to the lamp lens 4. It is arranged in small places.

  The metal wire 32 is made of, for example, a material having a resistance value of approximately 0 or approximately 0. The metal wire 32 forms a line pattern together with the conductive paste 19. Further, the metal wire 32 may be provided by being transferred to the lamp lens 4 together with the conductive paste 19, or after the conductive paste 19 is transferred to the lamp lens 4 by a dispenser. It may be wired to the lamp lens 4.

  Since the vehicular lamp according to the fifth embodiment is configured as described above, the low temperature portion of the lamp lens 4 and the like are warmed by the heat generating portion made of the conductive paste 19 of the wire heater 5 while the high temperature portion of the lamp lens 4 is heated. Or the like can be kept at room temperature by the non-heat generating portion made of the metal wire 32 of the wire heater 5. As a result, the vehicular lamp according to the fifth embodiment can achieve substantially the same function and effect as the vehicular lamp according to the first to fourth embodiments. That is, in the vehicular lamp according to the fifth embodiment, even if the temperature difference of the temperature distribution of the lamp lens 4 is large, snow, ice, and cloudiness adhering to the lamp lens 4 are spread over almost the entire lamp lens 4. Therefore, it is possible to reliably melt and remove the light, and to prevent loss of light emitted from the lamp lens 4.

  In addition, the vehicular lamp according to the fifth embodiment forms a heat generating portion and a non-heat generating portion depending on whether or not the conductive paste 19 of the wire heater 5 and the resistance value of the metal wire 32 are present. Despite the provision of the heat generating portion and the non-heat generating portion, the structure of the wire heater 5 and the heat generation control are simple, which can contribute to the manufacturing cost.

  Furthermore, the vehicular lamp according to the fifth embodiment forms a non-heat generating portion by causing the resistance value of the metal wire 32 of the wire heater 5 to be approximately 0 or approximately 0, thereby contributing to power saving. be able to.

  18 and 19 show Example 6 of a vehicle lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 17 denote the same components. Hereinafter, the vehicular lamp according to the sixth embodiment will be described.

  The vehicular lamp according to the sixth embodiment uses a line heater 33 that generates heat by electric resistance when a current is supplied as a heater. The line heater 33 forms a high temperature heat generating portion and a low temperature heat generating portion due to the difference in resistance value of the line heater 33, or forms a heat generating portion and a non-heat generating portion depending on the presence or absence of the resistance value of the line heater 33. Alternatively, the high-temperature heat generating part and the low-temperature heat generating part are formed by the density of the line pattern of the line heater 33.

  The line heater 33 is provided by being directly printed on the surface of the lamp lens 4 by a method such as screen printing or hot stamp printing, or by being directly adhered by an adhesive, or by attaching a film. Is provided. An anti-fogging and sealing coat 34 is applied to the surface of the lamp lens 4 on which the line heater 33 is provided. The anti-fogging and sealing coat 34 is made of, for example, an acrylic material, and electrically insulates the line heater 33 and protects it from external impacts. It prevents fogging.

  Since the vehicular lamp according to the sixth embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp according to the first to fifth embodiments. In particular, since the vehicular lamp according to the sixth embodiment applies the antifogging and sealing coat 34 to the surface of the lamp lens 4 provided with the line heater 33, the antifogging effect of the lamp lens 4, The effect of sealing (protecting) the wire heater 33 is obtained. Further, since the vehicular lamp according to the sixth embodiment is provided with the anti-fogging and sealing coat 34, the coating process can be reduced to one time, and the manufacturing cost is reduced accordingly. be able to.

  Hereinafter, examples other than Examples 1 to 6 will be described. In the first to sixth embodiments, the line heaters 5 and 33 are provided on the inner surface of the lamp lens 4. However, in the present invention, the line heaters 5 and 33 may be provided on the outer surface or both the inner and outer surfaces of the lamp lens 4.

  In the first to fifth embodiments, the line heater 5 is provided on the surface of the lamp lens 4 by transfer. However, in the present invention, the heater may be provided on the lamp lens 4 by direct printing, direct bonding, film insertion, insertion, or the like.

  Further, in the first to sixth embodiments, two heat generating portions, ie, a high temperature heat generating portion and a low temperature heat generating portion are formed in the line heaters 5 and 33, or one heat generating portion and a non-heat generating portion are formed. It is. However, in the present invention, the heater may be formed with three or more heat generating portions, or may be formed with two or more heat generating portions and a non-heat generating portion.

  Furthermore, Examples 1 to 6 described above are examples used for the lamp lens 4 of the headlamps 1L and 1R of the automobile C. However, in the present invention, it is used for vehicle lamps other than the headlamps 1L and 1R of the automobile C, for example, lamp lights such as signal lamps such as stop lamps, illumination lamps such as curve lamps, front combination lamps, and rear combination lamps. May be.

  Furthermore, in the first to sixth embodiments, the projector type lamp unit 2 using the semiconductor light source 12 as a light source will be described as a light irradiating unit for irradiating light through the lamp lens 4 to the outside. However, in the present invention, as the light irradiator, a light irradiator other than the lamp unit 2 described above, for example, a light source is a discharge lamp such as a semiconductor light source or HID, a halogen bulb, or an incandescent bulb, The lamp unit may be a type or direct-light type, or in a projector-type, reflection-type or direct-light type vehicle lamp, a semiconductor-type light source, a discharge lamp such as an HID, a light source of a halogen bulb or an incandescent bulb, and A combination of the light source and the reflecting surface may be used.

BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the vehicle lamp concerning this invention, and is explanatory drawing of the state currently used for the headlamp of a motor vehicle. Similarly, it is a vertical sectional view (longitudinal sectional view) of the headlamp. Similarly, it is a vertical sectional view (longitudinal sectional view) of a lamp unit used in a headlamp. It is a perspective view which similarly shows the lamp lens currently used for the headlamp. Similarly, it is an enlarged view of the V section in FIG. Similarly, it is the VI-VI sectional view taken on the line in FIG. Similarly, it is an enlarged view of the VII part in FIG. Similarly, it is the VIII-VIII sectional view taken on the line in FIG. Similarly, it is explanatory drawing which shows the manufacturing process of the lamp lens currently used for the headlamp. Similarly, it is explanatory drawing which shows the line heater unit used for a headlamp. It is a perspective view of the lamp lens of the headlamp of the motor vehicle which shows Example 2 of the vehicle lamp concerning this invention. Similarly, it is explanatory drawing which shows the line heater unit used for a headlamp. It is a perspective view of the lamp lens of the headlamp of the motor vehicle which shows Example 3 of the vehicle lamp concerning this invention. Similarly, it is a vertical sectional view (longitudinal sectional view) of the headlamp. It is a perspective view of the lamp lens of the headlamp of the motor vehicle which shows Example 4 of the vehicle lamp concerning this invention. Similarly, it is a vertical sectional view (longitudinal sectional view) of the headlamp. It is a perspective view of the lamp lens of the headlamp of the motor vehicle which shows Example 5 of the vehicle lamp concerning this invention. It is a vertical sectional view (longitudinal sectional view) of a headlamp of an automobile showing Example 6 of a vehicle lamp according to the present invention. Similarly, it is a partially expanded sectional view of a lamp lens, a line heater, and an anti-fogging and sealing coat.

Explanation of symbols

C Automobile CL Cut location 1L, 1R Headlamp (vehicle lamp)
DESCRIPTION OF SYMBOLS 2 Lamp unit 3 Lamp housing 4 Lamp lens 5 Wire heater 6 Feeding part 7 Lamp chamber 8 Upper reflector 9 Lower reflector 10 Reflecting surface 11 Shade 12 Semiconductor type light source (LED)
DESCRIPTION OF SYMBOLS 13 Projection lens 14 Heat sink member 15 Holder member 16 Heat sink member 17 Base film 18 Adhesive 19, 190, 19 ', 190' Conductive paste 19A Sparse line pattern part 19B Dense line pattern part 20 Resist 21 Separator 22 Release sheet 23 Sheet member 24 Power supply pattern portion 25 Surface mount type connector 26 Harness 27 Lens side connector 28 Lamp lens side wall 29 Housing side connector 30 Harness 31 Temperature control portion 32 Metal wire 33 Wire heater 34 Anti-fogging and sealing coat

Claims (4)

In a vehicular lamp where the lamp lens has a snow melting structure,
A lamp housing defining the lamp chamber and the lamp lens;
A light irradiating unit disposed in the lamp chamber and irradiating light to the outside through the lamp lens;
A heater provided in the lamp lens;
A power supply for supplying current to the heater;
With
The heater has at least a high temperature heating part and a low temperature heating part, or has a heating part and a non-heating part,
A vehicular lamp characterized by the above.   The heater is an electric heating member that generates heat by electric resistance when current is supplied, and has the high temperature heat generating portion and the low temperature heat generating portion due to a difference in resistance value, or the presence of resistance value and the heat generating portion. The vehicular lamp according to claim 1, further comprising the non-heat generating portion.   2. The heater according to claim 1, wherein the heater is a line heater that generates heat by electric resistance when an electric current is supplied, and has the high-temperature heat generating part and the low-temperature heat generating part due to density of a line pattern of the line heater. The vehicle lamp as described in 2.   The heater is a line heater that generates heat by electric resistance when current is supplied, and has the high-temperature heat generation part and the low-temperature heat generation part due to a difference in the resistance value of the line heater, or the resistance of the line heater The heating unit and the non-heating unit are provided depending on the presence or absence of the value, or the high-temperature heating unit and the low-temperature heating unit are provided depending on the density of the line pattern of the line heater, and the line heater is provided. The vehicular lamp according to claim 1, wherein the surface of the lamp lens is provided with an anti-fogging and sealing coat.

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