CN218607432U - Ultraviolet irradiation device for vehicle - Google Patents

Abstract

The utility model provides a can restrain and produce the leakage current and can improve productivity's for vehicle ultraviolet irradiation device in the electricity of discharge lamp and lighting circuit is connected. The lighting device for a vehicle according to an embodiment includes: a discharge lamp capable of emitting ultraviolet rays; a terminal holder on which the discharge lamp is mounted; a lamp housing that accommodates the discharge lamp and the terminal holder therein and has an opening at one end portion thereof; a lighting circuit capable of outputting a drive voltage of a predetermined frequency; a conductive member having a plate shape and electrically connecting the terminal holder and the lighting circuit; and a housing having a box shape and accommodating the discharge lamp, the terminal holder, the lamp cover, the lighting circuit, and the conductive member therein.

Description

Ultraviolet irradiation device for vehicle

Technical Field

The utility model discloses an embodiment relates to an ultraviolet irradiation device for vehicle.

Background

There is an ultraviolet irradiation apparatus including a discharge lamp that emits ultraviolet light. Conventionally, such an ultraviolet irradiation apparatus is used for curing of ultraviolet curable inks, paints, adhesives, and the like, surface modification of materials, photo-alignment of liquid crystals, and the like. Further, since ultraviolet rays have a bactericidal action, ultraviolet irradiation apparatuses are also used in some cases for sterilizing bacteria and inactivating viruses adhering to the surface of a component.

In recent years, with the increase of health consciousness, it has been desired to purify the atmosphere in the vehicle interior, the surfaces of articles in the vehicle interior, and the like in a relatively narrow closed space such as the vehicle interior or the vehicle interior of a railway vehicle.

Here, the vehicle ultraviolet irradiation device may be provided with a discharge lamp and a lighting circuit for applying a drive voltage of a predetermined frequency to the discharge lamp. Usually, the discharge lamp and the lighting circuit are electrically connected by an electric wire. However, if the discharge lamp and the lighting circuit are electrically connected by wires, the wires become long, and a leakage current is likely to occur or electromagnetic waves are likely to be emitted. Further, the electric wires electrically connecting the discharge lamp and the lighting circuit are required to have resistance to high voltage and ultraviolet rays. This special wire has a long lead time and is expensive. Therefore, the productivity of the ultraviolet irradiation device for a vehicle may be deteriorated.

In contrast, it is desired to develop an ultraviolet irradiation device for a vehicle that can suppress the occurrence of a leakage current in the electrical connection between the discharge lamp and the lighting circuit and can improve productivity.

Patent document 1: japanese patent laid-open publication No. 2009-195825

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an ultraviolet irradiation device for a vehicle, which can suppress generation of a leakage current in electrical connection between a discharge lamp and a lighting circuit and can improve productivity.

The vehicle lighting device according to the embodiment includes: a discharge lamp capable of emitting ultraviolet rays; a terminal holder on which the discharge lamp is mounted; a lamp housing that accommodates the discharge lamp and the terminal holder therein and has an opening at one end portion thereof; a lighting circuit capable of outputting a drive voltage of a predetermined frequency; a conductive member having a plate shape and electrically connecting the terminal holder and the lighting circuit; and a housing having a box shape and accommodating the discharge lamp, the terminal holder, the lamp cover, the lighting circuit, and the conductive member therein.

According to an embodiment of the present invention, there is provided an ultraviolet irradiation device for a vehicle capable of suppressing generation of a leakage current in electrical connection between a discharge lamp and a lighting circuit and improving productivity.

Drawings

Fig. 1 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device according to the present embodiment.

Fig. 2 isbase:Sub>A schematic sectional view of the ultraviolet irradiation device forbase:Sub>A vehicle of fig. 1, taken along linebase:Sub>A-base:Sub>A.

Fig. 3 is a schematic sectional view of the ultraviolet irradiation device for a vehicle of fig. 1, taken along line B-B.

Fig. 4 is a schematic enlarged view of a portion C in fig. 2.

Fig. 5 is a schematic enlarged view of a portion D in fig. 2.

Fig. 6 is a schematic cross-sectional view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 7 is a schematic cross-sectional view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 8 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 9 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device of fig. 8 taken along line E-E.

Fig. 10 is a schematic sectional view of the vehicle ultraviolet irradiation device of fig. 8 taken along line F-F.

Fig. 11 is a schematic plan view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 12 is a schematic side view illustrating a vehicle ultraviolet irradiation device according to another embodiment.

Fig. 13 is a schematic partial sectional view illustrating a mount according to another embodiment.

Fig. 14 (a) and (b) are schematic partial sectional views illustrating a case where the housing is directly attached to the ground contact end of the vehicle.

In the figure: 1-ultraviolet irradiation device for vehicle, 1 a-ultraviolet irradiation device for vehicle, 1 b-ultraviolet irradiation device for vehicle, 1 c-ultraviolet irradiation device for vehicle, 1 d-ultraviolet irradiation device for vehicle, 2-frame, 2 a-connection part, 3-substrate, 3 a-ground terminal, 4-discharge lamp, 5-lamp shade, 5 a-opening, 6-lighting circuit, 7-window, 8-shield, 8 a-shield, 8 b-shield, 9-conductive part, 10-spacer, 11-cladding part, 12-connection part, 13-mounting part, 13 a-base, 13 b-mounting seat, 21-first part, 22-second part, 22 a-hole, 32-fastening part, 41-terminal frame, 62-transformer, 100-ground terminal of vehicle.

Detailed Description

Hereinafter, embodiments will be described by way of example with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

The vehicle ultraviolet irradiation device according to the present embodiment may be installed in an automobile, a railway vehicle, or the like. For example, the vehicle ultraviolet irradiation device may be installed in a car interior, a trunk, or the like, or may be installed in a car body of a railway vehicle, or the like. However, the installation location of the vehicle ultraviolet irradiation device is not limited to the example.

Fig. 1 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device 1 according to the present embodiment.

Fig. 2 isbase:Sub>A schematic cross-sectional view of the vehicle ultraviolet irradiation device 1 of fig. 1 taken along the linebase:Sub>A-base:Sub>A.

Fig. 3 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1 of fig. 1 taken along line B-B.

As shown in fig. 1 to 3, the vehicle ultraviolet irradiation device 1 includes, for example, a housing 2, a substrate 3, a discharge lamp 4, a globe 5, a lighting circuit 6, a window 7, a cover 8, and a conductive member 9.

The housing 2 has a box shape and a space for accommodating the substrate 3, the discharge lamp 4, the terminal holder 41, the globe 5, the lighting circuit 6, the conductive member 9, and the like therein. The planar shape of the housing 2 may be a quadrangle, for example. However, the planar shape of the housing 2 may be changed as appropriate depending on the installation space of the ultraviolet irradiation device 1 for a vehicle. For example, the planar shape of the housing 2 may be a shape formed by a curve such as a circle or an ellipse, a shape formed by a curve or a straight line, or the like. The thickness T of the housing 2 may be set smaller than the planar size of the housing 2. If the thickness dimension T of the housing 2 is set to be small, it is easy to install the ultraviolet irradiation device 1 for a vehicle together with an electronic device used for vehicle driving or the like.

The housing 2 may be divided into a plurality of parts. In the vehicle ultraviolet irradiation device 1 illustrated in fig. 1 to 3, the housing 2 is divided into two parts in the thickness direction of the housing 2. When the housing 2 is divided into two parts in the thickness direction of the housing 2, the substrate 3, the discharge lamp 4, the terminal holder 41, the globe 5, the lighting circuit 6, the conductive member 9, and the like can be easily mounted inside the housing 2.

For example, the frame body 2 has a first portion 21 and a second portion 22.

The first portion 21 may be a space for mounting the substrate 3, the discharge lamp 4, the globe 5, the lighting circuit 6, the conductive member 9, and the like, for example.

The second portion 22 may, for example, be a cover covering the open side of the first portion 21. The second portion 22 may be provided with a hole 22a for emitting ultraviolet rays. The hole 22a is provided at a position facing the discharge lamp 4.

The second portion 22 may be removably disposed on the first portion 21. For example, the second portion 22 may be detachably provided on the first portion 21 by an elastic force. For example, the second portion 22 may be detachably provided to the first portion 21 by a fastening member such as a screw. The first portion 21 and the second portion 22 illustrated in fig. 1 to 3 are detachably connected to each other based on an elastic force generated by fitting the opening portions to each other.

The second portion 22 may be fixed to the first portion 21 with an adhesive or the like. However, if the second portion 22 is detachably provided on the first portion 21, maintenance such as replacement of the discharge lamp 4 becomes easy.

As shown in fig. 2 and 3, the substrate 3, the discharge lamp 4, the terminal holder 41, the lighting circuit 6, the conductive member 9, and the like are provided inside the housing 2. Therefore, if the first portion 21 and the second portion 22 are made of metal such as aluminum alloy, there is a possibility that electric leakage, short circuit, or the like may occur. Therefore, the frame body 2 is preferably made of resin having insulation properties. Further, if the housing 2 is made of resin having insulating properties, the weight of the vehicle ultraviolet irradiation device 1 can be reduced and the manufacturing cost can be reduced. The material of the second portion 22 may be the same as or different from the material of the first portion 21.

The substrate 3 has a plate shape. The substrate 3 is provided on the first portion 21 via a spacer 31 or the like, for example. Instead of the spacer 31, a convex portion may be provided on the first portion 21, and the substrate 3 may be provided on the convex portion. The material of the substrate 3 is not particularly limited. The substrate 3 may be made of, for example, ceramics such as alumina or aluminum nitride, or organic materials such as phenol paper or glass epoxy. The substrate 3 may be a metal core substrate in which the surface of a metal plate is coated with an insulating material.

The discharge lamp 4 is located between the substrate 3 and the second portion 22. The discharge lamp 4 may be disposed at a position facing the hole 22a of the second portion 22. The discharge lamp 4 is detachably provided on a pair of terminal holders 41. A pair of terminal holders 41 may be provided on the bottom surface of the lamp housing 5, for example. Although fig. 2 and 3 illustrate the case where one discharge lamp 4 is provided, a plurality of discharge lamps 4 may be provided. At least one discharge lamp 4 may be provided.

The discharge lamp 4 is not particularly limited as long as it can irradiate ultraviolet rays. As the discharge lamp 4, for example, a mercury lamp, a metal halide lamp, a dielectric barrier discharge lamp, or the like can be used. The discharge lamp 4 has, for example, a shape extending in one direction. If the discharge lamp 4 having a shape extending in one direction is used, the thickness dimension T of the housing 2 can be easily reduced.

The lamp shade 5 is located between the substrate 3 and the second portion 22. The lamp housing 5 may be provided on the substrate 3, for example. The globe 5 has a box shape, and one end portion thereof has an opening 5a. The opening 5a of the lamp housing 5 faces the hole 22a of the second portion 22. The discharge lamp 4 and the pair of terminal holders 41 can be accommodated in the lamp housing 5. The globe 5 is made of, for example, resin having insulation properties. The material of the globe 5 may be the same as that of the housing 2, for example. Since the globe 5 is exposed to the ultraviolet rays emitted from the discharge lamp 4, it is preferable to use a material having higher resistance to the ultraviolet rays than the material of the housing 2.

The lamp cover 5 can suppress the ultraviolet rays emitted from the discharge lamp 4 from being incident on the inner wall of the housing 2, the substrate 3, and the lighting circuit 6. Therefore, deterioration of these portions due to ultraviolet irradiation can be suppressed.

Further, the globe 5 may have a function of a reflector. For example, the globe 5 may be made of a resin such as white, or a reflective film may be formed on the inner wall of the globe 5, or the inner wall of the globe 5 may be curved. If the globe 5 is provided with a reflector function, the utilization efficiency of the ultraviolet rays emitted from the discharge lamp 4 can be improved.

The lighting circuit 6 is provided on the side of the substrate 3 where the discharge lamp 4 is provided, for example. If the discharge lamp 4 and the lighting circuit 6 are provided on the same side of the substrate 3, the thickness dimension T of the housing 2 can be easily reduced. As will be described later, the lighting circuit 6 is electrically connected to the terminal holder 41 via the conductive member 9, for example. Therefore, by mounting the discharge lamp 4 on the terminal holder 41, the lighting circuit 6 and the discharge lamp 4 can be electrically connected.

The lighting circuit 6 applies a drive voltage of a predetermined frequency to the discharge lamp 4. When a driving voltage is applied to the discharge lamp 4, for example, discharge occurs between a pair of electrodes provided in the discharge lamp 4, and ultraviolet rays are emitted from the discharge lamp 4.

The lighting circuit 6 is composed of circuit components such as a transformer 62, a switching element 63, and a capacitor. For example, the transformer 62 boosts the voltage from the battery of the vehicle to a predetermined voltage for lighting the discharge lamp 4. For example, the switching element 63 converts a direct-current voltage from a battery of the vehicle into an alternating-current voltage (for example, a sine-wave voltage) of a predetermined frequency. Conversion to a sinusoidal voltage can reduce the amount of electromagnetic wave noise generated. The frequency of the sine wave voltage is preferably about 100kHz to 300kHz, for example.

The lighting circuit 6 may be any circuit capable of generating a drive voltage of a predetermined frequency. The lighting circuit 6 may be, for example, a resonant inverter.

The lighting circuit 6 is electrically connected to, for example, the wiring 61. For example, as shown in fig. 1 and 3, one end portion side of the wiring 61 is drawn out to the outside of the housing 2. The wiring 61 may use a so-called three-core cable. For example, the electric wire 61a of the wiring 61 electrically connects the positive side of the lighting circuit 6 and the positive side of the battery of the vehicle. For example, the wire 61b of the wiring 61 electrically connects the negative electrode side of the lighting circuit 6 and the negative electrode side of the battery of the vehicle. The electric wire 61b may be a common line (common line). The electric wire 61c of the wiring 61 electrically connects the shield 8 and the ground of the vehicle (for example, the vehicle body frame). Further, the cover 8 may be in direct contact with the ground of the vehicle. At this time, the electric wire 61c may be omitted.

The window 7 is provided in a portion of the frame body 2 (second portion 22) where the hole 22a is provided. For example, the window 7 is provided on the inner wall of the second portion 22 and covers the hole 22a. The window 7 has a plurality of openings through which ultraviolet rays irradiated from the discharge lamp 4 can pass. The window 7 can be provided to allow ultraviolet rays emitted from the discharge lamp 4 to be emitted to the outside of the housing 2, and to prevent human fingers, foreign objects, and the like from entering the inside of the housing 2.

As shown in fig. 1, the window 7 may be formed by arranging a plurality of linear members in a lattice shape.

The window 7 may be formed by arranging a plurality of linear members in a net shape. The window 7 may be formed by arranging a plurality of linear members in one direction. These windows 7 may be formed by, for example, etching. When the window 7 is formed by etching, a frame portion surrounding the plurality of linear members may be provided. The lattice-shaped or mesh-shaped window 7 may be formed by weaving a plurality of wires.

The window 7 may be formed of a plate material having a plurality of openings (holes). Such a window 7 can be formed by, for example, etching or pressing.

Here, when the discharge lamp 4 is turned on and a discharge is generated between the electrodes of the discharge lamp 4, an electromagnetic wave is emitted together with the ultraviolet rays. When the discharge lamp 4 is lit, electromagnetic waves may be emitted from the switching elements 63 provided in the lighting circuit 6, or from wirings electrically connected to the switching elements 63.

The vehicle is provided with electronic equipment for running the vehicle, in addition to the vehicle ultraviolet irradiation device 1. In this case, since the vehicle ultraviolet irradiation device 1 and the electronic apparatus are installed in a narrow space such as a vehicle interior, the distance between the vehicle ultraviolet irradiation device 1 and the electronic apparatus is likely to be small. Therefore, when electromagnetic waves generated in the discharge lamp 4, the lighting circuit 6, or the like provided inside the housing 2 are radiated to the outside of the housing 2, the electromagnetic waves may be incident on electronic equipment provided in the vicinity of the vehicle ultraviolet irradiation device 1. If electromagnetic waves are incident on the electronic device, they may become electromagnetic noise, which may cause malfunction of the electronic device.

Therefore, the vehicle ultraviolet irradiation device 1 according to the present embodiment is provided with the cover 8.

The shield 8 suppresses the electromagnetic waves generated inside the housing 2 from being radiated outside the housing 2. The shielding effect is related to reflection loss, absorption loss, and multiple reflection loss in the shield 8, but the shielding effect when shielding electromagnetic waves is mainly related to reflection loss.

That is, if the reflection loss of the shield 8 is made large, the electromagnetic waves generated inside the housing 2 can be effectively suppressed from being radiated to the outside of the housing 2. In this case, the reflection coefficient of the shield 8 may be increased to increase the reflection loss. In order to increase the reflectance of the cover 8, the impedance of the cover 8 may be decreased.

For example, the shield 8 may be provided to have conductivity. In this case, if the shield 8 is made of a material having high electrical conductivity such as metal, reflection loss in the shield 8 can be increased, and the electromagnetic wave can be effectively suppressed from being radiated to the outside of the housing 2.

The shield 8 may be, for example, a plate or a film containing a conductive material, a conductive paint containing a conductive filler, a plating layer or a vapor deposition layer having conductivity, or the like. The plate or film made of a conductive material may be bonded to the frame 2 with an adhesive, a double-sided tape, or the like. The plate material including the conductive material may be integrally molded with the frame body 2 by insert molding or the like, for example. The conductive coating material may be applied to the frame 2, for example. The plating layer having conductivity may be provided on the surface of the frame body 2 by, for example, electroless plating. The vapor deposition layer having conductivity can be provided on the surface of the frame body 2 by, for example, sputtering.

As the conductive material, for example, metals such as aluminum, copper, nickel, and carbon steel can be used. In this case, a metal having high electric conductivity such as aluminum or copper is preferably used.

The shield 8 may be provided on at least one of an outer wall of the housing 2 and an inner wall of the housing 2, for example. In this case, when the shield 8 is provided on the outer wall of the housing 2 and the inner wall of the housing 2, the shielding effect can be improved.

However, the discharge lamp 4, the terminal holder 41, the lighting circuit 6, the conductive member 9, and the like are provided inside the housing 2. Therefore, if the shield 8 having conductivity is provided on the inner wall of the housing 2, it is necessary to ensure insulation between the shield 8 and the discharge lamp 4 and the like. For example, an insulation distance between the shield 8 provided on the inner wall of the housing 23 and the discharge lamp 4 or the like can be secured, or an insulation member such as an insulation sheet can be inserted between the shield 8 provided on the inner wall of the housing 2 and the discharge lamp 4 or the like.

However, this increases the thickness dimension T of the housing 2, or increases the weight of the vehicle ultraviolet irradiation device 1. As described above, the vehicle ultraviolet irradiation device 1 is often installed in a narrow space such as a vehicle interior together with electronic equipment for vehicle operation and the like. Therefore, if the thickness dimension T of the housing 2 becomes large or the weight of the vehicle ultraviolet irradiation device 1 becomes heavy, the installation of the vehicle ultraviolet irradiation device 1 may become difficult.

Therefore, in order to reduce the thickness of the vehicle ultraviolet irradiation device 1, as shown in fig. 2 and 3, the shield 8 is preferably provided on the outer wall of the housing 2. When the shield 8 is provided on the outer wall of the housing 2, the distance between the inner wall of the housing 2 having insulation properties and the discharge lamp 4, the terminal holder 41, the lighting circuit 6, the conductive member 9, and the like can be shortened, and therefore, the thickness dimension T of the housing 2 can be easily reduced. The shield 8 provided on the outer wall of the housing 2 is electrically connected to the ground of the vehicle via, for example, an electric wire 61c of the wiring 61. Further, the shield 8 provided on the outer wall of the housing 2 may be directly in contact with the ground contact end of the vehicle.

When the housing 2 is divided, shields are provided at portions of the plurality of housings 2. For example, as shown in fig. 1 to 3, when the housing 2 has the first portion 21 and the second portion 22, a shield 8a (corresponding to an example of a first shield) is provided on an outer wall of the first portion 21, and a shield 8b (corresponding to an example of a second shield) is provided on an outer wall of the second portion 22.

If any of the shields provided on the respective portions of the plurality of housings 2 is not electrically connected to the ground of the vehicle, the shield effect of the shield is reduced. At this time, if the wires 61c of the wiring 61 are electrically connected to all of the plurality of shields, the wiring operation may become complicated, and it may become difficult to detach the housing 2.

Therefore, when the frame body 2 is divided, the shields provided on the divided portions of the frame body 2 are electrically connected to each other at the connecting portions between the divided portions of the frame body 2.

Fig. 4 is a schematic enlarged view of a portion C in fig. 2.

As shown in fig. 4, when the frame body 2 has the first portion 21 and the second portion 22, the hood 8a provided on the outer wall of the first portion 21 and the hood 8b provided on the outer wall of the second portion 22 contact each other at the connecting portion 2a between the first portion 21 and the second portion 22. For example, the cover 8a may be provided also at the end of the first portion 21 on the opening side, and the cover 8b may be provided also at the end of the second portion 22 on the opening side.

In this way, the shield 8a and the shield 8b can be electrically connected. Therefore, both the shield 8a and the shield 8b can be electrically connected to the ground terminal of the vehicle, and thus the reduction of the shielding effect can be suppressed.

The substrate 3, the terminal holder 41, the lighting circuit 6, the conductive member 9, and the like are provided on the first portion 21. Therefore, it is preferable that the electric wire 61c of the wiring 61 is electrically connected to the cover 8a provided in the first portion 21. In this way, the second portion 22 can be easily attached and detached.

Here, as described above, the window 7 is provided with a plurality of openings through which ultraviolet rays irradiated from the discharge lamp 4 pass. Therefore, there is a possibility that electromagnetic waves are radiated to the outside of the housing 2 through the plurality of openings provided in the window 7. At this time, if the shield 8 is provided on the outer surface of the window 7, the ultraviolet rays cannot be radiated to the outside of the housing 2.

Therefore, the window 7 is provided to have conductivity. For example, the window 7 is made of a conductive material. The conductive material is the same as that used for the cover 8, for example. In this case, if the conductive material is a metal, the resistance to ultraviolet rays irradiated from the discharge lamp 4 can be improved.

When the window 7 has conductivity, reflection loss in the window 7 can be increased similarly to the above-described shield 8, and thus radiation of electromagnetic waves to the outside of the frame 2 via the window 7 can be suppressed.

Here, if the aperture ratio of the plurality of openings provided in the window 7 is reduced, the effect of shielding electromagnetic waves increases, but ultraviolet rays are less likely to transmit through the window 7. When the aperture ratio of the plurality of apertures provided in the window 7 is increased, the ultraviolet rays are easily transmitted through the window 7, but the effect of shielding electromagnetic waves is reduced.

In this case, the aperture ratio of the plurality of apertures provided in the window 7 may be appropriately selected within a range of 10% to 90%. For example, the aperture ratio of the plurality of apertures may be changed according to the distance or the like between the ultraviolet irradiation device 1 for a vehicle and an electronic apparatus for vehicle running or the like. For example, if the distance between the vehicle ultraviolet irradiation device 1 and the electronic apparatus is long, the aperture ratio of the plurality of apertures can be increased to increase the irradiation amount of the ultraviolet rays. For example, if the distance between the vehicle ultraviolet irradiation device 1 and the electronic equipment is short or the noise resistance of the electronic equipment is low, the aperture ratio of the plurality of apertures may be reduced.

In addition, the aperture ratio of the plurality of apertures provided in the window 7 = (total area of the plurality of apertures/area of the window 7) × 100.

Further, similarly to the above-described shield 8, if the window 7 is not electrically connected to the ground of the vehicle, the shielding effect of the window 7 is reduced. At this time, if the electric wire 61c of the wiring 61 is electrically connected to the shield 8 and the window 7, the wiring operation may become complicated or the removal of the housing 2 may become difficult. Therefore, the window 7 is electrically connected to the shield 8 (shield 8 b) provided in the frame 2 (second portion 22).

Fig. 5 is a schematic enlarged view of a portion D in fig. 2.

As shown in fig. 5, a shield 8 (shield 8 b) may be provided on the inner wall of the housing 2 (second portion 22) around the hole 22a for emitting ultraviolet rays.

In this way, the cover 8 (covers 8b and 8 a) can be electrically connected to the window 7. Therefore, the window 7 can be electrically connected to the ground of the vehicle via the shield 8 ( shields 8b and 8 a). As a result, the shielding effect of the window 7 can be suppressed from being lowered.

Further, the window 7 and the hood 8 (hood 8 b) may be connected by a fastening member such as a screw, a conductive tape, or the like. In this way, the connection between the window 7 and the hood 8 (hood 8 b) becomes stronger, and thus the connection between the window 7 and the hood 8 (hood 8 b) can be suppressed from dropping due to vibration during traveling or the like.

As shown in fig. 2 and 3, a pair of conductive members 9 may be provided. A pair of conductive members 9 is provided on the opposite side of the substrate 3 from the side on which the terminal holder 41 is provided. The pair of conductive members 9 electrically connect the terminal holder 41 and the lighting circuit 6, respectively. The pair of conductive members 9 are electrically connected to the terminal holder 41 and the lighting circuit 6, respectively, via a fastening member such as a conductive screw. Each of the pair of conductive members 9 has a plate shape and has conductivity. The pair of lead members 9 are preferably each made of a metal having high electric conductivity such as copper or a copper alloy.

Here, if the terminal holder 41 and the lighting circuit 6 are electrically connected by using a pair of wires, the length of the wires is easily increased. As described above, the lighting circuit 6 applies a high-frequency and high-voltage driving voltage to the discharge lamp 4. Therefore, if the terminal holder 41 and the lighting circuit 6 are electrically connected using a pair of wirings, leakage current is likely to occur between the wirings and the like. If a leakage current occurs, the light emission efficiency of the discharge lamp 4 is reduced. Further, if the length of the wiring is increased, it is easy to radiate electromagnetic waves from the wiring when the discharge lamp 4 is turned on. Further, the electric wires electrically connecting the discharge lamp 4 and the lighting circuit 6 are required to have resistance to high voltage and ultraviolet rays. This special wire has a long lead time and is expensive. Therefore, if the terminal holder 41 and the lighting circuit 6 are electrically connected by using a pair of wires, the productivity of the ultraviolet irradiation device for a vehicle is reduced.

In the ultraviolet irradiation device 1 for a vehicle according to the present embodiment, the terminal holder 41 and the lighting circuit 6 are electrically connected using the pair of conductive members 9 having a plate shape. Therefore, the length of the conductive member 9 can be easily shortened, and thus the occurrence of a leakage current in the electrical connection between the discharge lamp 4 and the lighting circuit 6 can be suppressed. If the generation of the leakage current can be suppressed, the light emission efficiency of the discharge lamp 4 can be improved.

At this time, as shown in fig. 3, a distance L between a connection position of the transformer 62 and the conductive member 9 and a connection position of the terminal holder 41 and the conductive member 9 is preferably 10mm or less. When the distance L is 10mm or less, the generation of the leakage current can be further suppressed. As a result, the light emission efficiency of the discharge lamp 4 can be further improved.

Further, since the plate-like lead member 9 can be easily manufactured by sheet metal working or the like, productivity can be improved.

Fig. 6 is a schematic cross-sectional view illustrating a vehicle ultraviolet irradiation device 1a according to another embodiment.

As shown in fig. 6, the vehicle ultraviolet irradiation device 1a includes, for example, a housing 2, a substrate 3, a discharge lamp 4, a globe 5, a lighting circuit 6, a window 7, a cover 8, a conductive member 9, a spacer 10, and a cover 11. The vehicle ultraviolet irradiation device 1a may be configured by additionally providing the spacer 10 and the coating portion 11 to the vehicle ultraviolet irradiation device 1, for example.

The spacer 10 is provided in plurality. A plurality of spacers 10 are disposed between the substrate 3 and the lamp cover 5. The spacer 10 forms a gap between the substrate 3 and the lamp cover 5. Fastening members such as screws are inserted into the spacer 10. The fastening member fixes the spacer 10 and the globe 5 to the substrate 3.

If the spacer 10 is provided, a gap can be provided between the substrate 3 and the globe 5. Therefore, the heat generated in the discharge lamp 4 can be suppressed from being transmitted to the substrate 3 via the globe 5. As a result, the outer wall of the housing 2 can be prevented from becoming high temperature and the lighting circuit 6 can be prevented from deteriorating.

The covering portion 11 has insulation and covers the transformer 62. The covering portion 11 can be formed by, for example, supplying an insulating resin so as to cover the transformer 62 and curing the resin. For example, the covering part 11 may be formed by a molding package (potting) or the like.

As described above, the distance L between the connection position of the transformer 62 and the conductive member 9 and the connection position of the terminal holder 41 and the conductive member 9 is preferably set short. However, in order to insulate the transformer 62 from the terminal holder 41, it is necessary to secure a creepage distance or a space distance between the transformer 62 and the terminal holder 41. In this case, if the covering portion 11 having insulation and covering the transformer 62 is provided, the distance between the transformer 62 and the terminal holder 41 can be shortened. Therefore, the distance L can be easily set to 10mm or less, and the generation of the leakage current can be suppressed more effectively. As a result, the light emission efficiency of the discharge lamp 4 can be more effectively improved.

Fig. 7 is a schematic cross-sectional view illustrating a vehicle ultraviolet irradiation device 1b according to another embodiment.

As shown in fig. 7, the vehicle ultraviolet irradiation device 1b includes, for example, a housing 2, a substrate 3, a discharge lamp 4, a globe 5, a lighting circuit 6, a window 7, a cover 8, a conductive member 9, a cover 11, and a connecting portion 12. The vehicle ultraviolet irradiation device 1b may be configured by additionally providing the covering portion 11 and the connecting portion 12 to the vehicle ultraviolet irradiation device 1, for example.

The connecting portion 12 has conductivity, electrically connects the conductive member 9 and the terminal holder 41, and forms a gap between the substrate 3 and the globe 5. The connecting portion 12 is provided in plurality. The connection portion 12 has, for example, a plate-like base electrically connected to the terminal holder 41. The connecting portion 12 has a plate-like leg portion having one end connected to the periphery of the base and the other end electrically connected to the conductive member 9. The leg portion illustrated in fig. 7 is provided with a pair. The base and the leg portion may be formed integrally by sheet metal working or the like. The base of the connecting portion 12 is connectable to the globe 5 and the terminal holder 41 by a fastening member such as a conductive screw. The leg portion of the connecting portion 12 may be laser-welded to the conductive member 9, for example.

If the connection portion 12 is provided, a gap can be provided between the substrate 3 and the globe 5. Therefore, the heat generated in the discharge lamp 4 can be suppressed from being transmitted to the substrate 3 via the globe 5. As a result, the outer wall of the housing 2 can be prevented from becoming high in temperature and the lighting circuit 6 can be prevented from deteriorating.

Further, the conductive member 9 and the terminal holder 41 can be electrically connected with a simple structure. Therefore, the manufacturing cost of the vehicle ultraviolet irradiation device 1b can be reduced.

As described above, the use of the vehicle ultraviolet irradiation devices 1, 1a, and 1b can suppress the occurrence of a leakage current in the electrical connection between the discharge lamp 4 and the lighting circuit 6. Further, since the plate-shaped lead member 9 can be easily manufactured by sheet metal working or the like, productivity can be improved.

Here, as described above, in the case of the ultraviolet irradiation device for a vehicle, the ultraviolet irradiation device for a vehicle is often installed in a narrow space such as a vehicle interior together with an electronic apparatus. Therefore, in the case of the ultraviolet irradiation device for a vehicle, it is preferable that the ultraviolet irradiation device for a vehicle be further thinned and that the emission of electromagnetic waves be suppressed.

Fig. 8 is a schematic perspective view illustrating a vehicle ultraviolet irradiation device 1c according to another embodiment.

Fig. 9 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1c of fig. 8 taken along line E-E.

Fig. 10 is a schematic cross-sectional view of the vehicle ultraviolet irradiation device 1c of fig. 8 taken along line F-F.

As shown in fig. 8 to 10, the vehicle ultraviolet irradiation device 1c includes, for example, a housing 2, a substrate 3, a discharge lamp 4, a globe 5, a lighting circuit 6, a window 7, a cover 8, and a conductive member 9.

The substrate 3 may be provided with at least one ground terminal 3a to which a ground terminal of the lighting circuit 6 and the like are electrically connected. The substrate 3 may be mounted on, for example, a projection 21a provided on the first portion 21. At this time, the ground terminal 3a of the substrate 3 may be electrically connected to the ground terminal 100 of the vehicle using the fastening member 32 having conductivity. The ground end 100 of the vehicle is, for example, a frame of the vehicle. The fastening member 32 having conductivity is, for example, a screw made of metal or the like.

In this way, the ground terminal of the lighting circuit 6 and the like and the ground terminal 100 of the vehicle can be electrically connected via the fastening member 32 having conductivity. Therefore, the noise generated in the lighting circuit 6 and the like can be released to the ground terminal 100 of the vehicle. Further, since the ground line electrically connected to the lighting circuit 6 and the like can be omitted, the vehicle ultraviolet irradiation device 1 can be easily installed in a narrow space. Further, the work of connecting the ground wire to the ground terminal 100 of the vehicle can be omitted.

In this case, a plurality of ground terminals 3a are preferably provided. The plurality of ground terminals 3a are electrically connected to the ground terminal 100 of the vehicle via conductive fastening members 32. In this way, the reliability of the ground connection can be improved.

When the ground terminal of the lighting circuit 6 or the like and the ground terminal 100 of the vehicle are electrically connected to each other by the fastening member 32 having conductivity, a so-called two-core cable can be used as the wiring 61d as shown in fig. 8. That is, it is sufficient to provide the wire 61a for electrically connecting the positive side of the lighting circuit 6 and the positive side of the battery of the vehicle and the wire 61b for electrically connecting the negative side of the lighting circuit 6 and the negative side of the battery of the vehicle.

As described above, according to the present embodiment, it is possible to reduce the thickness of the vehicle ultraviolet irradiation device and to suppress the emission of electromagnetic waves from the vehicle ultraviolet irradiation device.

Fig. 11 is a schematic plan view illustrating a vehicle ultraviolet irradiation device 1d according to another embodiment.

Fig. 12 is a schematic side view for illustrating the vehicle ultraviolet irradiation device 1 d.

The vehicle ultraviolet irradiation device 1d illustrated in fig. 11 and 12 is configured by additionally providing a mounting member 13 to the vehicle ultraviolet irradiation device 1c. That is, the vehicle ultraviolet irradiation device 1d is provided with, for example, a housing 2, a substrate 3, a discharge lamp 4, a globe 5, a lighting circuit 6, a window 7, a shield 8, a conductive member 9, and a mounting member 13.

For convenience of explanation, the discharge lamp 4, the globe 5, the lighting circuit 6, the conductive member 9, and the like are appropriately omitted in fig. 11 and 12.

As shown in fig. 11 and 12, the attachment member 13 is provided on the side of the frame body 2 opposite to the side where the window 7 is provided. The mounting member 13 is provided between the ground contact end 100 of the vehicle and the outer wall of the housing 2 (first portion 21) provided with the hood 8 (hood 8 a). The mounting member 13 has conductivity.

The mounting member 13 includes a base 13a and a plurality of mounting seats 13b. The base 13a and the plurality of mounting seats 13b may be formed integrally by sheet metal working or the like, for example. The mounting member 13 is made of a conductive member such as metal, for example.

The base 13a has a plate shape. The portion of the substrate 3 where the ground terminal 3a is provided, the frame 2 (first portion 21), and the cover 8 (cover 8 a) are connected to the base 13a by a conductive fastening member 32.

A plurality of mounting seats 13b are provided at the periphery of the base 13 a. The plurality of mounting seats 13b are exposed to the outside of the housing 2 (first portion 21) in plan view. The number of the plurality of mounting seats 13b is not particularly limited. The number of the plurality of mounting seats 13b may be two or more. The mounting seat 13b is provided with a mounting hole 13b1. The plurality of mounting seats 13b are connected to the ground terminal 100 of the vehicle by fastening members such as screws inserted into the mounting holes 13b1.

The mounting seat 13b may have a plate shape or an L shape. The mount 13b illustrated in fig. 11 and 12 has an L-shape. If the mount 13b is plate-shaped, an increase in the thickness dimension of the vehicle ultraviolet irradiation device 1d can be suppressed. If the mounting seat 13b is L-shaped, interference with the convex portion on the surface of the ground contact end 100 of the vehicle can be avoided.

Fig. 13 is a schematic partial sectional view illustrating a mount base 13ba according to another embodiment.

As shown in fig. 13, the mount base 13ba has an L-shape. The mounting base 13b illustrated in fig. 11 and 12 is bent in a direction away from the housing 2. In contrast, as shown in fig. 13, the mount base 13ba is bent in a direction approaching the housing 2. If such a mounting seat 13ba is provided, the housing 2 can be provided inside a hole or a recess provided in the ground contact end 100 of the vehicle (for example, a vehicle frame). Therefore, the protruding dimension of the housing 2 from the surface of the ground contact end 100 of the vehicle can be reduced, and the vehicle ultraviolet irradiation device 1d can be easily installed in a narrow space.

Since the mounting member 13 is made of a conductive material, the ground terminal of the lighting circuit 6 and the like electrically connected to the ground terminal 3a of the substrate 3 and the shields 8 ( shields 8a and 8 b) can be electrically connected to the ground terminal 100 of the vehicle via the mounting member 13.

Further, since the plurality of mounting seats 13b are exposed to the outside of the housing 2, the mounting member 13 can be mounted on the ground contact end 100 of the vehicle without detaching the housing 2. Therefore, the installation work and the maintenance work of the vehicle ultraviolet irradiation device 1d become easy.

Fig. 14 (a) and (b) are schematic partial sectional views illustrating a case where the housing 2 is directly attached to the ground contact end 100 of the vehicle.

As shown in fig. 14 (a), different screws may be used for the screws for attaching the housing 2 to the ground terminal 100 of the vehicle and the screws for attaching the substrate 3 to the housing 2.

As shown in fig. 14 (b), the same screws may be used for the screws for attaching the housing 2 to the ground terminal 100 of the vehicle and the screws for attaching the substrate 3 to the housing 2.

Although the embodiments of the present invention have been described above by way of example, these embodiments are merely illustrative and are not intended to limit the scope of the present invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. These embodiments and modifications thereof are within the scope and spirit of the present invention, and are also included in the invention described in the claims and equivalents thereof. The above embodiments may be combined with each other.

Claims (10)

1. An ultraviolet irradiation device for a vehicle, comprising:

a discharge lamp capable of emitting ultraviolet rays;

a terminal holder on which the discharge lamp is mounted;

a lamp housing that accommodates the discharge lamp and the terminal holder therein and has an opening at one end portion thereof;

a lighting circuit capable of outputting a drive voltage of a predetermined frequency;

a conductive member having a plate shape and electrically connecting the terminal holder and the lighting circuit; and

and a housing having a box shape and accommodating the discharge lamp, the terminal holder, the cover, the lighting circuit, and the conductive member therein.

2. The ultraviolet irradiation apparatus for vehicle as set forth in claim 1,

the lighting circuit includes a transformer for boosting an input voltage to a predetermined voltage for lighting the discharge lamp,

the distance between the connection position of the transformer and the conductive member and the connection position of the terminal holder and the conductive member is 10mm or less.

3. The ultraviolet irradiation apparatus for vehicle as set forth in claim 2,

the transformer further comprises a coating part which has insulation and coats the transformer.

4. The ultraviolet irradiation device for a vehicle according to any one of claims 1 to 3, further comprising:

a substrate having a plate shape; and

a spacer forming a gap between the substrate and the lamp cover,

the conductive member is provided on one side of the substrate,

the lamp cover, the lighting circuit, and the spacer are provided on a side of the substrate opposite to a side on which the conductive member is provided.

5. The ultraviolet irradiation device for a vehicle according to any one of claims 1 to 3, further comprising:

a substrate having a plate shape; and

a connection part having conductivity and electrically connecting the conductive member and the terminal holder, and forming a gap between the substrate and the lamp cover,

the connecting part has:

a base having a plate shape and electrically connected to the terminal holder; and

and a leg portion having a plate shape, one end portion of which is connected to a peripheral edge of the base, and the other end portion of which is electrically connected to the conductive member.

6. The ultraviolet irradiation device for a vehicle according to any one of claims 1 to 3, further comprising:

a substrate having at least one ground terminal electrically connected to a ground terminal of the lighting circuit; and

a shield which is provided on an outer wall of the housing and has conductivity,

the frame body also accommodates the substrate,

the ground terminal of the substrate is electrically connected to a ground terminal of a vehicle via a fastening member having conductivity.

7. The ultraviolet irradiation apparatus for vehicle as set forth in claim 6,

the ground terminal is provided in plural numbers,

the plurality of ground terminals are electrically connected to a ground terminal of the vehicle via conductive fastening members, respectively.

8. The ultraviolet irradiation apparatus for vehicle as set forth in any one of claims 1 to 3,

the frame body has a first portion and a second portion detachably provided on the first portion,

a first shield having conductivity is provided on an outer wall of the first portion,

a second shield having conductivity is provided on an outer wall of the second portion,

the first shield is electrically connected with the second shield at a connection portion between the first portion and the second portion.

9. The ultraviolet irradiation apparatus for vehicle as set forth in claim 8,

the vehicle further includes an attachment member that is provided between a ground contact end of a vehicle and an outer wall of the first portion where the first shield is provided, and that has conductivity.

10. The ultraviolet irradiation apparatus for vehicle as set forth in claim 9,

the mounting member has a plurality of mounting seats exposed to an outer side of the first portion in a plan view.

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