JP3041699U - Vehicle illuminator unit - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a light emitting unit for a vehicle, which does not need to be provided with a hole or the like in a mounting target portion on a vehicle and can be mounted easily and at low cost. A vehicle light emitting unit (1) includes a receiving / light emitting unit (2) and a transmitting unit (3). The reception / light emission unit 2 is attached to the outer surface of the wall W of the hollow attachment target portion set on the vehicle, and temporally fluctuates with the light emission portion 4 that emits light by external power supply. The receiving side coil 30 is configured to receive a magnetic field (fluctuation magnetic field) from the outside and generate an induced electromotive force. The electric power based on the induced electromotive force is supplied to the light emitting section 4 to drive the light emitting section 4. The transmission unit 3 is attached to the inner surface of the wall portion W of the attachment target portion, is disposed substantially coaxially with the reception side coil 30 at a position corresponding to the reception side coil 30, and the reception side coil is interposed via the wall portion W. A transmitting side coil 31 for transmitting the fluctuating magnetic field to the transmitting side coil 31 and a drive circuit section for supplying a time-varying current to the transmitting side coil 31 so that the fluctuating magnetic field is generated in the transmitting side coil 31. Including.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a light emitter unit for a vehicle, and more particularly to a light emitter unit used by being attached to a predetermined attachment target portion on a vehicle such as a bumper of an automobile for the purpose of decoration or the like.

[0002]

[Prior art]

 For example, a lot of markings such as a reflector or a fluorescent plate are attached to a vehicle body of an automobile to confirm the rear portion of the vehicle body or the width of the vehicle at night, for example. These markings receive light from the outside and reflect it, or emit fluorescent light to shine brightly. Light emitting diode (LED) elements are attached to the mudguard sheet of the tire and the outer surface of the door. An increasing number of vehicles are equipped with a type that emits light by itself from an external power supply, such as an EL (electroluminescent) light emitting element. In recent years, in particular, an increasing number of vehicle models are provided with marking bodies for checking the side clearance of the vehicle body on both sides of the rear bumper. Such markings are often simply made up of reflective plates, but some high-end models are equipped with self-luminous types such as the above-mentioned LED elements or EL light-emitting elements as standard equipment. is there.

By the way, such a marking body often plays a role as a decorative body in addition to its original function as a marking body. Therefore, a commercially available reflector plate or the like is obtained, and this is desired for a vehicle body. There are quite a few car enthusiasts who attach it to the part and enjoy it as an accessory. Under such circumstances, the type of mark that self-luminesces with electric power is clearly different from an inexpensive reflector, and is a favorite because it is installed only in luxury car models. Anyone who wants to attach it to his or her own car at one time has become a longing or a drool.

[0004]

[Problems to be solved by the device]

 By the way, the above-mentioned marking body can be easily attached to the vehicle body by simply attaching it with a double-sided adhesive layer or the like if it is a reflector plate, etc. Various problems occur as described in. First, when a vehicle-mounted battery is used as the power source of the light emitting unit, the light emitting unit is fixed to the vehicle outer surface, for example, a mounting target such as a bumper, but since the battery is inside the vehicle, Holes must be formed in the wall for the wiring from the battery. However, this method is very troublesome in the work of mounting the marking body and requires a technique for making holes, which is far from the situation that ordinary enthusiasts can easily carry out the mounting work. The construction cost will be considerably high. Further, once the marking body is attached, a hole is opened in the mounting target portion, so there is a fatal drawback that if the marking body is to be removed later, it cannot be repaired. Therefore, it is conceivable to install all the batteries and drive circuits in the case in addition to the light-emitting part into an integrated unit and attach it to the vehicle body.However, this method causes a large increase in the volume of the unit and makes it unattractive. Not at all.

An object of the present invention is to provide a light emitting unit for a vehicle which does not require a hole or the like to be formed in a mounting target portion on a vehicle and can be mounted easily and inexpensively.

[0006]

[Means for Solving the Problems and Functions / Effects]

 In order to solve the above problems, a vehicle light emitting unit of the present invention is characterized by including a receiving / light emitting unit and a transmitting unit having the following configurations. Receiving / light emitting unit: It is designed to be mounted on the outer surface of the wall of a hollow mounting target part set on the vehicle and includes the following requirements. -Light emitting part: Light is emitted by itself from an external power supply. -Power supply unit: It is configured to include a receiving coil that receives a time-varying magnetic field (fluctuation magnetic field) from the outside and generates an induced electromotive force, and supplies power based on the induced electromotive force to the light emitting unit. . Transmission unit: It is designed to be installed on the inner surface of the wall of the installation target part and includes the following requirements. -Transmitting coil: Almost coaxially arranged with the receiving coil at a position corresponding to the receiving coil, and transmits the fluctuating magnetic field to the receiving coil via the wall portion. Driving circuit section: A time-varying current (fluctuation current) is applied to the transmitting coil so that a varying magnetic field is generated in the transmitting coil.

According to this configuration, the receiving / light emitting unit having the light emitting unit is outside the hollow mounting target unit, and the transmitting unit having the driving circuit unit is inside the mounting target unit independently of each other without wiring or the like. It can be attached in the form. Then, the fluctuating magnetic field from the transmitting side coil, which is caused by the passage of the fluctuating current, passes through the wall of the attachment target part and is transmitted to the receiving side coil of the receiving / light emitting unit to generate an induced electromotive force. The light emitting unit receives electric power based on this induced electromotive force from the power feeding unit and emits light. That is, since electric power from the inside of the mounting target (that is, the vehicle body) is transmitted to the outside of the mounting target in the form of a fluctuating magnetic field without passing through the wiring, a hole or the like for passing wiring or the like through the mounting target It is possible to construct a mechanism for causing the light emitting portion to emit light without forming the. As a result, the light emitter unit can be attached very easily, and the attachment target portion is not damaged, such as the through hole, which is difficult to repair.

The vehicle may in particular be an automobile. The attachment target portion is not particularly limited, but may be, for example, the rear bumper of the automobile (for example, both side portions thereof). In this case, it is preferable to select, as the attachment target portion, a portion made of a non-conductive material that does not cause eddy current loss due to a fluctuating magnetic field, such as plastic. For example, in the case of a rear bumper of an automobile, a plastic bumper, which has been increasing in number in recent years, is particularly suitable as a mounting target portion.

In the light emitter unit, an alternating current can be used as the variable current. In this case, the drive circuit unit includes an AC generation circuit for generating the AC. In addition, the transmission side coil generates an alternating magnetic field having a waveform corresponding to the alternating current waveform by the above-mentioned alternating current conduction. Then, the receiving coil receives the alternating magnetic field to generate a driving AC having a waveform corresponding to the AC waveform as a fluctuating current. By using alternating current as the fluctuating current, it is possible to stably supply power to the light emitting unit.

The more specific constitution of the luminous body unit of the present invention is as described in detail in claim 3 and subsequent claims of the utility model registration, and its main point and the action brought by it in order to avoid duplication. -Only the effects will be described below.

In the configuration of claim 3, the alternating current generation circuit uses at least a part of the winding portion of the transmitting side coil as an inductance for transmitting side oscillation, and the capacitance for transmitting side oscillation is combined with this. It has a transmission side LC oscillation circuit as an AC generation source. Since the L C oscillator circuit can easily generate an alternating current having a relatively high frequency, power can be efficiently transmitted even if the receiving coil is small. As a result, the receiving / light emitting unit can be made smaller or thinner, its appearance can be improved, and the heat generated in each coil is also reduced. For example, when the mounting target part is made of resin or the like. However, there is no need to worry about it being hurt by heat. Further, in the above-mentioned transmitting-side LC oscillator circuit, at least a part of the winding portion of the transmitting-side coil is used as the oscillating inductance, so that the receiving / light-emitting unit is further compactly constructed. According to the structure of claim 4, since the transmission side LC oscillation circuit is a self-excited oscillation circuit having a bias coil, and the transmission side coil and the bias coil are integrally configured as the transmission side transformer, the transmission side LC oscillation circuit is formed. The circuit can be made more compact.

On the other hand, in the configuration of claim 5, in the power feeding portion of the receiving / light emitting unit, the receiving side oscillation inductance formed by at least a part of the winding portion of the receiving side coil, and the receiving side oscillation combined therewith And a receiving side LC oscillating circuit having substantially the same resonance frequency as the transmitting side LC oscillating circuit. According to this configuration, the frequency difference between the transmitter coil and the receiver coil is unlikely to occur, and the power loss due to the frequency mismatch can be extremely reduced. In such a configuration, such an effect is generated between the transmitting side LC oscillating circuit and the receiving side LC oscillating circuit via the magnetic fields generated by the transmitting side coil and the receiving side coil, respectively. It is presumed that the cause is that the secondary resonance phenomenon occurs in the direction in which they are to be matched.

It should be noted that the receiving side coil and the transmitting side coil are arranged such that one end faces thereof face each other with the wall portion of the mounting target portion sandwiched therebetween. The interval is preferably set to 5 mm or less (claim 6). If the distance exceeds 5 mm, the magnetic field from the transmitting coil will not be sufficiently transmitted to the receiving coil, and the receiving coil will not be able to generate enough power to drive the light emitting section to emit light. Further, if the power is forcibly secured, the value of the current flowing to the transmitter coil must be increased considerably, which may cause heat generation in the transmitter coil.

Next, the light emitting section can be configured to include an electroluminescent light emitting element (hereinafter referred to as an EL element) (claim 7). Since the EL element can obtain high emission brightness with low power consumption, it greatly contributes to downsizing of the receiving / light emitting unit and can be easily thinned. Further, there is an advantage that various emission colors can be selected according to the type of fluorescent agent used. In addition, its light emission is uniform and soft, and it has excellent fashionability. As the EL element, any of an AC thin film type, an AC thick film type, a DC thin film type, and a DC thick film type can be used. In the present invention, the driving circuit can be inexpensively constructed and the emission brightness A high-thickness AC thick film type can be particularly preferably used.

When an AC drive type EL element is used, the drive AC frequency is generally about 100 to 1000 Hz. However, if an alternating current of such a frequency is used as it is, in order to generate sufficient induced electromotive force in the receiving coil to drive the light emitting element to emit light, it is necessary to use the transmitting coil to secure the necessary magnetic field. You will have to pass a large current. As a result, the power transmission efficiency from the transmitting coil to the receiving coil is reduced, which not only makes the transmitting coil huge, but also causes an increase in power consumption and a problem of coil heat generation. Therefore, in the configuration of claim 8, a carrier AC generating circuit for generating carrier AC having a frequency higher than the driving frequency of the EL element is provided in the AC generating circuit of the transmitting unit, and the carrier AC is converted by the modulator circuit. The modulation is performed at a modulation frequency corresponding to the driving frequency of the light emitting element. By using a high-frequency carrier alternating current as the alternating current for generating the magnetic field, the power transfer characteristic from the transmitting coil to the receiving coil is improved, resulting in inevitable power consumption, and the coil size and thus the light emission. The size of the body unit can be significantly reduced.

In this case, due to the fluctuating magnetic field generated by the transmitting side coil based on the modulated carrier alternating current, an alternating current (corresponding modulated alternating current) having a waveform corresponding to the modulated carrier alternating current is generated in the receiving side coil. Although it occurs, the frequency component of the carrier AC is not required to drive the EL element. Therefore, the power supply section of the receiving / light emitting unit removes or reduces the component corresponding to the carrier AC from the corresponding modulated AC. , A driving AC component extraction circuit for extracting an AC component corresponding to the driving frequency of the EL element (driving AC component: corresponding to modulation frequency component). The EL element is driven to emit light based on the extracted driving AC component.

When the frequency of the driving AC is adjusted in the range of 100 Hz to 1 kHz, the frequency of the carrier AC is preferably adjusted in the range of 10 to 100 kHz (claim 9). If the frequency of the carrier AC is less than 10 kHz, it becomes impossible to secure sufficient power transfer characteristics from the transmitting coil to the receiving coil. On the other hand, if the frequency exceeds 100 kHz, the operation of a semiconductor element such as a transistor, a diode or a thyristor included in an electric circuit in the transmitting unit or the receiving / light emitting unit may be adversely affected.

Next, in the structure of claim 10, the transmitting side LC oscillating circuit is used as a carrier AC generating circuit, and the carrier AC is amplified by a pulse wave by a modulating circuit including a pulse oscillating circuit. I tried to modulate it. This makes it possible to simply and inexpensively configure the transport AC generation circuit and the modulation circuit.

The constitution of claim 11 is a further embodiment of the constitution of claim 10 as follows. That is, in the power feeding section of the receiving / light emitting unit, the corresponding modulated alternating current is rectified by the rectifying circuit and supplied to the EL element, while the trigger input is received on the short-circuit path that short-circuits both ends of the EL element. A switching element (for example, a thyristor) that closes the short-circuit path is provided, and the trigger input is applied to the trigger terminal of the switching element intermittently at the driving AC component included in the corresponding modulation AC, that is, the frequency of the pulse wave. And a circuit. Then, if the short-circuit path is opened due to the operation of the switching element, the EL element is energized in the first direction where its inherent capacitance is charged by the output from the rectifier circuit, while the short-circuit path is closed. If this is the case, the electric charge accumulated in the capacitance is discharged through the short-circuit path, so that the EL element is energized in the second direction opposite to the above. As a result, a circuit for alternately energizing the EL element in the opposite direction by using the pulse wave corresponding to the driving AC component can be configured relatively simply, and the light emission stability of the EL element can be increased.

Further, in the structure of claim 12, which is further embodied in the above, the receiving / light emitting unit is provided with a receiving side transformer, and one of the primary side coil and the secondary side coil is a receiving side coil. The other is used as a trigger drive coil that creates an input signal to the trigger drive circuit. Further, in the trigger drive circuit, the output from the trigger drive coil is used as a base input, a part of the output from the rectifier circuit is used as a collector input, and a transistor whose collector side is connected to the trigger terminal of the switching element, And a capacitor connected to the collector side of the transistor. At the time of trigger driving, the output of the receiving coil is not used, but the output of another trigger driving coil that forms a transformer with the receiving coil is used, so that alternating current supply to the EL element is made more stable. It is possible to further stabilize the light emission of the EL element. Further, as described in claim 12, the transistor uses the trigger driving AC as a base input and changes its collector input so as to have a waveform corresponding to the corresponding modulation AC. At this time, if the collector input waveform is directly applied to the trigger terminal of the switching element, the switching element operates at a high frequency of the carrier AC, and the EL element does not operate normally. However, in the above structure, the capacitor removes or reduces the component corresponding to the carrier AC from the collector input waveform, so that the EL element can be operated without any problem.

Next, the light emitting portion can be configured to include one or a plurality of LED elements (claim 13). The LED element has higher brightness than the EL element and the element itself is inexpensive, and since it can be driven by direct current, it has an advantage that the driving circuit is simple. Specifically, as in the structure of claim 14, the receiving / light emitting unit only needs to be provided with a rectifying circuit for rectifying the driving AC generated in the receiving side coil, and the manufacturing cost of the entire light emitting unit is reduced. Can be significantly reduced as compared with the case of using an EL element.

Next, in the configuration of claim 14, in the receiving / light emitting unit, the light emitting part and the power supplying part are housed in the receiving side case body, and the receiving side mounting body is mounted on the outer surface of the wall part of the mounting target part. It is designed to be detachable depending on the steps. As a result, the receiving / light emitting unit can be easily attached. In this case, if the receiving-side attaching means is composed of the double-sided adhesive layer as in the fifteenth aspect, the attaching work becomes easier. When the receiving / light emitting unit is not used, one side of the double-sided adhesive layer is attached to the receiving / light emitting unit, while the other side (the side to be attached to the attachment target part) is attached. Can be covered with a peeling sheet. 17. The receiving / light emitting unit according to the configuration of claim 16, wherein the light emitting portion is plate-shaped, and the light emitting portion and an electric circuit board constituting the power feeding portion are stacked and housed in the hollow flat receiving side case body. Can be formed into a compact and flat shape, and the appearance when mounted on a vehicle can be significantly improved.

Next, in the configuration of claim 17, at least the transmitting side coil of the transmitting unit is housed in the case body, and this can be detachably mounted on the inner surface of the wall portion of the mounting target portion by a predetermined mounting means. It was configured to be attached. This makes it easy to install the transmitter unit. The receiving / light emitting unit can be attached to a plurality of places on the vehicle (for example, both side portions of the rear bumper of the automobile), but in the structure of claim 18, the receiving coil is attached to each receiving / light emitting unit in the transmitting unit. While correspondingly provided separately, at least a part of the drive circuit section is shared between the above-mentioned transmitting side coils, and the output from the shared section is distributed to each transmitting side coil by the output distribution wiring section. I chose As a result, the configuration of the drive circuit unit can be simplified when a plurality of receiving / light emitting units are provided, and the entire unit can be constructed at low cost.

In this case, in the structure of claim 19, each transmitting coil is housed in the transmitting coil case body to form the coil unit, and the wall of the attachment target portion is located at a position corresponding to each receiving unit. While it is removably attached to the inner surface of the unit by the attachment means for the transmitting side coil, the drive circuit section is housed in another drive circuit section case body to form a drive circuit section unit, which is attached by the drive circuit section attachment means. It should be detachably attached to a specified part of the vehicle. As a result, the receiving coil and the drive circuit section can be easily attached. Further, when the transmitting coil mounting means and the drive circuit mounting means are each configured to include the double-sided adhesive layer as in the structure of claim 20, the mounting work becomes easier. Incidentally, these double-sided adhesive layers can also be adhered on one side to the units while the other side is covered with a release sheet in the unused state of the coil unit or the drive circuit unit.

The drive circuit section of the transmission unit receives power from a battery mounted on the vehicle. In this case, according to the configuration of claim 21, at the end of the wiring cable for supplying electric power to the drive circuit unit, to the vehicle side wiring unit for supplying electric power from the battery to a predetermined electric power supply destination in the vehicle, the intermediate portion thereof is provided. A connector portion is detachably coupled to the portion and a connector portion that distributes electric power passing through the vehicle-side wiring portion to the wiring cable in the coupled state is provided. As a result, the electric wiring connection of the transmission unit can be extremely facilitated.

[0026]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. FIG. 1 shows the external appearance of a vehicle light emitter unit (hereinafter, simply referred to as a light emitter unit) 1 according to an embodiment of the present invention. In this example, the vehicle is an automobile M, and the parts to which the light emitting unit 1 is attached are both side parts of a rear bumper B made of plastic and hollow (only one side part is visible in the figure). Exist).

As shown in FIG. 3, the light emitting unit 1 includes a receiving / light emitting unit 2 attached to the outer surface of the wall W of the bumper B and a transmitting unit 3 also attached to the inner surface of the wall W. Have. As shown in FIG. 2, the receiving / light emitting unit 2 has an EL element 4 as a light emitting unit and a receiving transformer 5 having a receiving coil 30 that receives an alternating magnetic field from the outside to generate an induced electromotive force. , A power supply section 6 for supplying electric power based on the induced electromotive force to the EL element 4. The power feeding unit 6 has an electric circuit board (hereinafter, simply referred to as a board) 7 on which a circuit for driving the EL element 4 to emit light is mounted, and the receiving side transformer 5 is also mounted on the board 7.

FIG. 4C shows an example of the internal structure of the EL element 4. This is configured as a thick film AC type EL device, and a transparent electrode 21, a phosphor light emitting layer 22, a high impedance layer (configured as a high dielectric insulating film such as BaTiO ₃ ) on the substrate 20. The transparent electrode 24 and the transparent protective layer (composed of a polymer material having a high dielectric constant such as polyvinylidene fluoride or cyanoethyl cellulose) 25 are laminated in this order. Then, by applying an alternating electric field to the phosphor light emitting layer 22 through the terminals 26 and 27 and the transparent electrodes 21 and 24, the phosphor light emitting layer 22 emits light of a luminescent color. The emission color depends on the material of the phosphor. For example, a yellow-light-colored ZnS: Mn (before the colon (:) shows the host material, after the colon shows the activator component, the same applies hereinafter) phosphor, green of ZnS: TbF ₃ phosphor or SrS: (Ce, Cl) phosphor, a red spectroscopic system CaS: Eu phosphor or ZnS: SmF ₃ phosphor, blue of ZnS: TmF ₃ a phosphor or the like can be used. Here, since the EL element 4 has a structure in which the high impedance layer 23 is sandwiched between the transparent electrodes 21 and 24, the EL element 4 has an inherent capacitance (electrostatic capacity).

Further, the transmission unit 3 has a transmission side transformer 8. The transmission-side transformer 8 is arranged substantially coaxially with the reception-side coil 30 of the reception-side transformer 5 at a position corresponding to the reception-side transformer 5 and applies an alternating magnetic field to the reception-side coil 30 through the wall W. The transmission side coil 31 for transmitting is built in. The transmitting side transformer 8 is housed in a transmitting side coil case body 9 to form a coil unit 3a, and as shown in FIG. 3, this is on the inner surface of the wall W at a position corresponding to each receiving / light emitting unit 2. It is fixed. On the other hand, the transmission unit 3 is provided with a drive circuit section that energizes the transmission side coil 31 with an alternating current having a predetermined waveform so that the alternating magnetic field is generated in the reception side coil 30. A portion (described later) shared by the two coil units 3a is accommodated in a drive circuit unit case body 10 separate from the transmission side coil case body 9 to form a drive circuit unit unit 3b. The drive circuit unit 3b is attached to a predetermined portion inside the automobile, for example, near the center in the width direction of the inner surface of the bumper B. On the other hand, as will be described later, the drive circuit unit also has a portion individually provided for each of the coil units 3a, and the drive circuit unit 3b outputs the output from each coil unit while being incorporated into the coil unit 3a. It is distributed to the unit 3a by the output distribution wiring portion 3c.

Here, in FIG. 2, the receiving side coil 30 and the transmitting side coil 31 are arranged such that one end faces of the receiving side coil 30 and the transmitting side coil 31 face each other with W in between, and the distance between the end faces is 5 mm or less. Is set to.

Next, as shown in FIG. 4, the receiving / light-emitting unit 2 has an EL element 4 and a power feeding section 6 housed inside, and a receiving case configured so that the light emitted by the EL element 4 can be visually recognized. It has a body 11. The EL element 4 is formed in a plate shape, and the receiving-side case body 11 is formed in a hollow flat shape, and one surface side in the thickness direction thereof is made of a transparent material such as transparent plastic or glass. It has a transparent portion 11b configured to transmit the light emitted by the EL element 4. As shown in FIG. 2, the receiving-side case body 11 has a receiving flange 11c protruding inwardly along one inner edge of the opening of the frame body 11a, and a large number of convex lens portions formed on the surface thereof. The transparent portion 11b has a structure in which it is fitted into the frame 11a from the inside. An annular seal member 11d made of rubber or the like is arranged between the receiving flange 11c and the outer edge of the transparent portion 11b.

Then, the electric circuit board 7 constituting the power feeding section 6 is stacked inside the frame body 11a in a state of being laminated on the plate surface side opposite to the EL element 4 facing the light transmitting section 11b. Is housed in. Then, the back surface side of the receiving-side case body 11 is closed by a back lid 11f formed with a pressing protrusion 11e, and the back lid 11f is fastened to the frame body 11a by a screw 11g. A seal member 11h is arranged between the frame 11a and the back cover 11f. Then, as shown in FIG. 2, the receiving / light emitting unit 2 is detachably fixed to the outer surface of the wall portion W of the bumper B by the double-sided adhesive layer 12 as the receiving side attaching means on the case back 11f side. As shown in FIG. 4, the double-sided adhesive layer 12 is covered with the release sheet 12a in the unused state.

Further, as shown in FIG. 5, in the coil unit 3 a, the transmission side transformer 8 is mounted on the board 13 together with the peripheral circuit, and is housed together with the board 13 in the transmission side case body 9. As shown in FIG. 2, the transmission-side case body 9 includes a bottomed case body 9a and a lid 9b that closes an opening side of the case body 9a with a screw 9d through a sealing member 9c, and an inner surface side of the lid 9b. A pressing protrusion 9e for preventing the rattling of the substrate 13 is formed on the. The coil unit 3a is detachably fixed to the inner surface of the wall W of the bumper B by the double-sided adhesive layer 14 serving as the attachment means for the transmission coil on the back cover 9b side. In addition, as shown in FIG. 5, the double-sided adhesive layer 14 is covered with the release sheet 14a in the unused state. In FIG. 3, the drive circuit case 10 is also detachably fixed to the inner surface of the wall W of the bumper B by the double-sided adhesive layer.

Next, FIG. 6 shows a configuration example of an electric circuit of the light emitting unit 1. First, to explain from the transmission unit 3 side, the drive circuit unit 3b is composed of an operational amplifier 32 and an operational amplifier 33, and a square wave pulse oscillation circuit 41 (oscillation frequency of, for example, 400 Hz) including resistors 34 to 39 and a capacitor 40 in the periphery. ), A transistor 42 whose base is connected to the output side of the operational amplifier 33, and a wiring cable 43 for distributing the electric power from the battery X mounted on the automobile M to the transmission unit 3. The square wave pulse oscillator circuit 41 and the transistor 42 form a modulator circuit 44. Since the direct current from the battery X is often superposed with the alternating current from the dynamo D mounted on the automobile M, a rectifying diode 45 and a rectifying diode 45 are provided on the wiring 43a connected to the wiring cable 43. A capacitor 46 for removing ripple is provided. Further, in this embodiment, open collector type operational amplifiers are used as the operational amplifiers 32 and 33, and pull-up resistors 34 to 35 are connected to each output side thereof, and are biased using the battery X as a power source.

On the other hand, on the coil unit 3a side, the transmission side coil 31 is wound around the primary side of the transmission side transformer 8 and a part of its winding portion is used as the transmission side oscillation inductance 47. A capacitor 48 as a transmission oscillation capacitor is connected in parallel with this to form a transmission LC oscillation circuit 50 driven by the battery X via the wiring 43a. The transmission side LC oscillation circuit 50 is configured as a self-excited oscillation circuit in which the secondary side coil of the transmission side transformer 8 is a bias coil 49 and this is excited by a battery via the resistors 35 and 19. The oscillation frequency is adjusted in the range of 10 to 100 kHz. In this embodiment, the driving frequency of the ultrasonic sensor for back sonar mounted on the automobile M is about 40 kHz, and its oscillation frequency is adjusted to about 32 kHz to avoid competition with this.

Next, the transistor 42 of the modulation circuit 44 has its collector side connected to the transmission side coil 31 and its emitter side grounded. Then, as the transmission-side LC oscillation circuit 50 is driven to oscillate, a sinusoidal carrier AC having an oscillation frequency of about 32 kHz is generated in the transmission-side coil 31, and this is a square-wave pulse that is base-input to the transistor 42. The square wave pulse wave from the oscillation circuit 41 causes the amplitude modulation at about 400 Hz.

Wiring branches from the wiring 3c from the drive circuit unit 3b, the wiring portion including the resistors 35 and 19 for exciting the bias coil 47, and the collector side terminal of the transistor 42, respectively. They are bundled as the above-mentioned output distribution wiring portion 3c and similarly connected on the side of the other coil unit 3a.

Further, a vehicle side wiring portion C for supplying electric power to a predetermined electric power supply destination in the automobile M extends from the battery X, but the wiring cable 43 is attached to the end portion thereof. It is detachably connected to the intermediate portion of the vehicle side wiring portion C by the connector portion 51, and the electric power from the battery X passing through the vehicle side wiring portion C is distributed to the wiring cable 43 through the connector portion 51. It is supposed to be done. FIG. 7 shows an example of the connector section 51. This is commercially available under the trade name of "Electrotap", and as shown in FIG. 2 (a), the connector portion 51 includes a first base portion 52, a second base portion 53, a stripper / wiring portion. 54 and 54 are configured as an integral resin molded body that is joined so as to be bendable in a hinge shape.

The vehicle-side wiring portion C configured as a covered cable and the terminal end portion of the wiring cable 43 are arranged in the receiving grooves 52a and 52b formed in the first base portion 52 in a state substantially parallel to each other, and correspond to each other. By bending and overlapping the second base portion 53 having the receiving grooves 53a and 53b and further engaging the engaging portions 53c and 52c with each other, the wiring portion C and the wiring cable 43 are formed between them. Retained. Next, the stripper / wiring portion 54 is bent and fitted into the through hole 52d formed in the first base portion 52. A metal plate 55 is arranged in the stripper / wiring part 54 in a direction intersecting with the held wiring part C 1 and the wiring cable 43, and stripper slits 55a and 55b are provided at positions corresponding to the wiring part C and the wiring cable 43. Has been formed. Then, as the stripper / wiring part 54 is fitted, the assembled state shown in FIG. 7 (b) is obtained, and as shown in FIG. 7 (c), the wiring part C and the wiring cable 43 are placed inside the stripper slits 55a and 55b, respectively. The coating portions C'and 43 'are stripped while relatively entering into the core, and the core wires C "and 43" are electrically connected and connected via the metal plate 55.

Next, returning to FIG. 6, the circuit configuration of the receiving / light emitting unit 2 side will be described. First, in the power feeding unit 6, the receiving side coil 30 is wound around the primary coil side of the receiving side transformer 5, and this coil is also used as the receiving side oscillation inductance, and in parallel with this, the receiving side oscillation capacitor is provided. 56 are connected in parallel to form a receiver LC oscillator circuit 57. In the receiving side LC oscillation circuit 57, the inductance of the receiving side coil 30 and the capacitance of the capacitor 56 are adjusted so that the receiving side LC oscillation circuit 57 has substantially the same resonance frequency as the transmitting side LC oscillation circuit 50. Then, the transmitting side coil 31 generates a fluctuating magnetic field H based on the carrier alternating current amplitude-modulated in the modulation circuit 44, and the receiving side coil 30 receives the fluctuating magnetic field H to generate the modulated carrier alternating current. Generate the corresponding modulation AC of the corresponding waveform.

Next, a voltage doubler rectifying circuit 62 including diodes 58 and 59 and capacitors 60 and 61 is connected to both ends of the receiving side coil 30 as a rectifying circuit, and a rectifying AC component extracting circuit 63 is used. Are connected to both terminals 26 and 27 of the EL element 4, respectively. The driving AC component extraction circuit 63 removes or reduces the component corresponding to the carrier AC from the corresponding modulated AC from the receiving side coil 30, and at the same time, the AC component corresponding to the driving frequency (about 400 Hz) of the EL element 4. It plays a role of extracting or forming (AC component for driving: AC having a frequency substantially corresponding to the modulation frequency).

In the driving AC component extraction circuit 63, a thyristor 65 as a switching element provided on a short circuit path 64 that short-circuits both terminals 26 and 27 of the EL element 4 and a trigger terminal of the thyristor 65 are provided. A trigger drive circuit 66 which is connected and intermittently applies a trigger input to the thyristor 65 at the frequency of the modulating pulse wave based on the driving AC component contained in the corresponding modulating AC from the receiving coil 30. There is. Here, a trigger driving coil 67 that produces an input signal to the trigger driving circuit 66 is wound around the secondary side of the receiving-side transformer 5.

The trigger drive circuit 66 uses the output from the trigger drive coil 67 as a base input, and part of the output from the voltage doubler rectifier circuit 62 is input to the collector via a resistor 68, while its collector is input. A transistor 69 whose side is connected to the gate terminal of the thyristor 65, and a capacitor 70 connected to the collector side of the transistor 69 are provided. Then, in the trigger driving coil 67, when a corresponding modulation AC is generated in the receiving side coil 30, a trigger driving AC having a waveform corresponding to the corresponding modulation AC is generated as an induced electromotive force thereof. Therefore, the transistor 69 changes the collector input into a waveform corresponding to the corresponding modulation AC by using the trigger driving AC as the base input. Further, the capacitor 70 has a function of removing or reducing the component corresponding to the carrier AC of the corresponding modulated AC among the collector input waveforms, whereby the component corresponding to the driving AC component is dominant. The corrected collector input waveform is input to the trigger terminal of the thyristor 65.

The operation of the light emitting unit 1 will be described below. First, the transmission side unit 3 and the reception side unit 2 are attached to the bumper B of the vehicle M as shown in FIGS. 2 and 3, and further, the transmission side unit 3 and the connector portion 51 are used to connect the vehicle side wiring portion of the battery X. Connect to C. As a result, in the transmitting side unit 3, a modulating alternating current in which the carrier alternating current having a frequency of about 32 kHz is amplitude-modulated at a modulating frequency of about 400 Hz is generated in the transmitting side coil 31, and the fluctuating magnetic field H generated thereby is generated. Corresponding modulation AC is generated in the receiving side coil 30 via the. The corresponding modulation alternating current is subjected to full-wave voltage doubler rectification by the voltage doubler rectifier circuit 62, saw-tooth converted by the driving AC component extraction circuit 63, and input to the EL element 4.

An outline of the operation of the driving AC component extraction circuit 63 at this time will be described. First, as shown in FIG. 8, a 32 kHz AC waveform pulse-modulated at 400 Hz is input to the base of the transistor 69. To be done. As a result, the transistor 69 is basically switched at high speed at a frequency of 32 kHz, but since the capacitor 70 is connected to the collector side, this removes the 32 kHz component (corresponding to the AC component for carrier), As shown in FIG. 8B, the transistor 69 is apparently base-driven by the above-mentioned pulse wave of 400 Hz, and the action of the capacitor 70 further generates a sawtooth collector waveform, which is generated by the gate of the thyristor 65. It will be input to the terminal. A resistor 71 is connected to the capacitor 70 in parallel with the capacitor 70 to accelerate the discharge and sharpen the falling edge of the sawtooth wave.

Due to the sawtooth wave input, the thyristor 65 turns on when the voltage input to the gate terminal exceeds a predetermined trigger voltage, and turns off when the voltage drops below the holding voltage, and short-circuits the EL element in the short-circuit path 64. It opens and closes at 400 Hz, which is the drive frequency of 4. Then, when the thyristor 65 opens the short circuit path 64, the EL element 4 is energized in the first direction in which its inherent capacitance is charged by the output from the voltage doubler rectifier circuit 62, and conversely the short circuit occurs. When the path 64 is closed, the electric charge accumulated in the capacitance is discharged through the short-circuit path 64, and the current is supplied in the second direction opposite to the above. As a result, the EL element 4 is driven to emit light by inputting a sawtooth AC waveform corresponding to its driving frequency (400 Hz in this embodiment) as shown in FIG. 8C. Although 72 is a capacitor for removing a DC component, it may be omitted if the DC component can be ignored.

The light emitting unit may use an LED instead of the EL element. Explaining an example thereof, a substrate 6 as shown in FIG. 9 is arranged inside the receiving side case body 11 of the receiving unit 2 shown in FIG. 4, for example. On the substrate 6, a plurality of LEDs 71 are arranged, for example, in a grid pattern on the side facing the translucent portion 11b (FIG. 4), and the receiving side coil 46 is provided on the rear surface side. In this configuration, since the LED 71 is driven by direct current, the receiving side coil 46 does not need to be incorporated in the transformer. FIG. 10 shows an example of the circuit configuration in this case (the same parts as those in FIG. 6 are denoted by the same reference numerals and the description thereof is omitted). First, the transmission unit 3 side does not need a modulation circuit, and the transmission side LC oscillation circuit 50 is mainly used. On the other hand, on the side of the receiving / light emitting unit 2, the alternating current of the corresponding frequency is generated in the receiving coil 30 by receiving the alternating magnetic field generated as the transmitting coil 47 oscillates in the alternating current. The alternating current output from the receiving coil 30 is converted into a direct current by a full-wave rectifying circuit 79 including a diode bridge 75 and a smoothing circuit 76 including a capacitor 77 and a resistor 78 (or a coil). It is supplied to the plurality of diodes 71 connected in series and emits light.

[Brief description of the drawings]

FIG. 1 is an external schematic view showing a usage example of a vehicle light emitter unit of the present invention, and a schematic cross-sectional view thereof.

FIG. 2 is a sectional view showing a main part of the vehicle light emitting unit of FIG.

FIG. 3 is a schematic sectional view showing an example of a form of attachment to the automobile bumper.

FIG. 4 is a perspective view showing an example of a receiving / light emitting unit, a partially cutaway perspective view showing an internal structure thereof, and a schematic sectional view showing an example of an EL element.

FIG. 5 is a perspective view showing an example of a coil unit and a partially cutaway perspective view showing an internal structure thereof.

FIG. 6 is a circuit diagram showing an example of an electrical configuration of a vehicle light emitter unit.

FIG. 7 is a perspective view showing an example of a connector portion.

8 is a schematic diagram showing an input waveform in each part of the driving AC component extraction circuit in the circuit diagram of FIG.

FIG. 9 is a perspective view showing an example in which a light emitting unit is configured by LEDs.

FIG. 10 is a circuit diagram showing an example of an electrical configuration in that case.

[Explanation of reference numerals] 1 vehicle light emitter unit M automobile (vehicle) B rear bumper (attachment target part) 2 reception / light emission unit 3 transmission unit 3a coil unit 3b drive circuit unit 3c output distribution wiring section 4 EL element ( (Light emitting part) 5 Receiving side transformer 6 Power feeding part 7 Electric circuit board 8 Transmitting side transformer 9 Transmitting side coil case body 10 Driving circuit part case body 11 Receiving side case body 11b Light transmitting part 12 Double-sided adhesive layer (receiving side attaching means) ) 14 Double-sided adhesive layer (attachment means for transmitting side coil) 30 Receiving side coil 31 Transmitting side coil 41 Square wave pulse oscillating circuit 42 Transistor 43 Wiring cable 44 Modulating circuit 47 Transmitting side oscillating inductance 48 Capacitor (transmitting side oscillating capacitance) 49 Bias coil 50 Transmitter side LC oscillator circuit 51 Connector part 5 7 Receiver-side LC oscillator circuit 62 Double voltage rectifier circuit (rectifier circuit) 63 Driving AC component extraction circuit 64 Short circuit path 65 Thyristor (switching element) 66 Trigger drive circuit 67 Trigger drive coil 79 Rectifier circuit

Claims (22)

[Utility model registration claims] 1. A light-emitting unit that emits light by itself from an external power supply, and a receiving-side coil that receives a time-varying magnetic field (hereinafter referred to as a fluctuating magnetic field) from the outside to generate an induced electromotive force, A receiving / light emitting unit attached to the outer surface of the wall portion of a hollow attachment target portion set on the vehicle, the power feeding portion supplying electric power based on the induced electromotive force to the light emitting portion; A transmission side coil that is disposed substantially coaxially with the reception side coil at a position corresponding to the reception side coil, and that transmits the varying magnetic field to the reception side coil through the wall portion; and the transmission side coil. So that the fluctuating magnetic field is generated in
A transmission unit configured to include a drive circuit unit that supplies a time-varying current (hereinafter, referred to as fluctuating current) to the transmission-side coil, and which is attached to an inner surface of the wall portion of the attachment target unit; An illuminant unit for a vehicle, comprising: 2. The drive circuit section of the transmission unit comprises:
An alternating current generation circuit that generates alternating current as the fluctuating current is included, and the transmitting side coil generates an alternating magnetic field having a waveform corresponding to the alternating current waveform by energizing the alternating current, and the receiving side coil is the alternating magnetic field. The light emitting unit for a vehicle according to claim 1, wherein a driving AC having a waveform corresponding to the AC waveform is generated as the fluctuating current by receiving the alternating current. 3. The alternating current generating circuit has a predetermined value including a transmitter oscillation inductance formed by at least a part of a winding portion of the transmitter coil and a transmitter oscillation capacitance combined with the inductance. 3. The vehicular light emitter unit according to claim 2, comprising a transmission side LC oscillation circuit that oscillates at a frequency. 4. The self-excited oscillation circuit in which the transmission-side LC oscillation circuit is configured such that the transmission-side oscillation capacitance is connected in parallel to the transmission-side oscillation inductance and the transmission-side oscillation inductance is excited by a bias coil. The vehicle-side light emitter according to claim 3, wherein the transmission-side coil and the bias coil constitute a transmission-side transformer in which one of them is a primary-side coil and the other is a secondary-side coil. unit. 5. The receiving-side oscillation inductance formed by at least a part of the winding portion of the receiving-side coil, and the receiving-side oscillation capacitance combined with the feeding section of the receiving / light emitting unit. The vehicle light emitter unit according to claim 3, further comprising a reception-side LC oscillation circuit having a resonance frequency substantially the same as that of the transmission-side LC oscillation circuit. 6. The receiving side coil and the transmitting side coil are arranged such that one end faces of the receiving side coil and the transmitting side coil face each other with a wall portion of the attachment target portion interposed therebetween, and a distance between the end faces is 5 mm. The vehicle light emitter unit according to any one of claims 1 to 5, which is set as follows. 7. The vehicle light emitting unit according to claim 1, wherein the light emitting unit includes an electroluminescent light emitting element. 8. The alternating current drive type is used as the electroluminescent light emitting element, and the alternating current generating circuit of the transmitting unit generates a carrier alternating current having a frequency higher than a drive frequency of the electroluminescent light emitting element. And a modulation circuit that modulates the generated alternating current AC at a modulation frequency corresponding to the drive frequency of the electroluminescent light-emitting element. Due to the fluctuating magnetic field generated by the transmitting side coil based on the working alternating current, an alternating current having a waveform corresponding to the modulated carrier alternating current (hereinafter referred to as corresponding modulation alternating current) is generated in the receiving side coil. In addition, the power feeding unit of the receiving / light emitting unit is configured to transfer the corresponding modulation AC from the receiving coil to the carrier. A driving AC component extraction circuit that removes or reduces a component corresponding to an AC and extracts or forms an AC component corresponding to the driving frequency (hereinafter, referred to as a driving AC component) is provided, and the electroluminescent light emitting element is The vehicle luminous body unit according to claim 7, wherein the luminous body unit is driven to emit light based on the extracted driving AC component. 9. The frequency of the transfer AC is 10 to 100.
9. The vehicle light emitting unit according to claim 8, wherein the lighting AC unit is adjusted in a range of kHz, and the frequency of the driving AC is adjusted in a range of 100 to 1000 Hz. 10. The transmission side LC oscillation circuit constitutes the carrier AC generation circuit, and the modulation circuit includes a pulse oscillation circuit for generating a pulse wave having the modulation frequency as an oscillation frequency. 9. The carrier wave AC is amplitude-modulated by a pulse wave generated by the pulse oscillating circuit, and the corresponding modulation AC contains a drive AC component based on the pulse wave. The vehicle luminous body unit described in. 11. The rectifying circuit for rectifying the corresponding modulated AC from the receiving coil, the electroluminescent light emitting element connected to the rectifying circuit, Between the luminescent light emitting element and the rectifier circuit, provided on a short circuit path that short-circuits both ends of the electroluminescent light emitting element, and having a trigger terminal to receive a trigger input of a predetermined level,
A switching element that closes the short-circuit path, a trigger terminal of the switching element, and based on a driving AC component included in the corresponding modulation AC, the trigger input of the pulse wave to the switching element And a trigger drive circuit that intermittently applies at a frequency, and when the switching element opens the short circuit path, the electroluminescent light emitting element has the light emitting element by the output from the rectifying circuit. When a specific capacitance is charged in the first direction and is energized, and the switching element closes the short circuit path, the electric charge accumulated in the capacitance is discharged through the short circuit path, The electroluminescent light emitting element is adapted to be energized in a second direction opposite to the first direction. Light emitter for vehicle unit according to claim 10, wherein. 12. The receiving / light emitting unit is provided with a receiving side transformer, and one of a primary side coil and a secondary side coil of the receiving side transformer is used as the receiving side coil, and the other side is connected to the trigger drive circuit. Of the trigger drive circuit, the output from the trigger drive coil is used as a base input, a part of the output from the rectifier circuit is used as a collector input, and the collector side is the collector side. A transistor connected to the trigger terminal of the switching element and a capacitor connected to the collector side of the transistor are provided, and in the trigger driving coil, as the corresponding modulation AC is generated in the receiving side coil, As the induced electromotive force, a trigger driving AC having a waveform corresponding to the corresponding modulation AC is generated, and the transistor is connected to the trigger driving AC. Current as a base input, the collector input is changed to have a waveform corresponding to the corresponding modulation AC, while the capacitor is a component of the collector input waveform corresponding to the carrier AC of the corresponding modulation AC. And a collector input waveform mainly composed of a component corresponding to the driving AC component is input to a trigger terminal of the switching element. 11. The vehicle light emitter unit according to item 11. 13. The light emitting unit is configured to include one or a plurality of LED elements, and the receiving / light emitting unit is provided with a rectifying circuit for rectifying the driving AC generated in the receiving coil, 7. The vehicle light emitter unit according to claim 1, wherein the LED element is driven to emit light by a rectified output from the rectifier circuit. 14. The receiving / light emitting unit accommodates the light emitting unit and the power feeding unit inside, and a receiving side case body configured to visually recognize the light emitted by the light emitting unit, and the receiving side case body. 14. The vehicle light emitter unit according to any one of claims 1 to 13, further comprising: a receiving-side attaching means for detachably attaching to a wall surface of the attachment target portion. 15. The vehicle light emitting unit according to claim 14, wherein the receiving side attachment means includes a double-sided adhesive layer for fixing the receiving side case body to the attachment target portion. 16. In the receiving / light emitting unit, the light emitting portion is formed in a plate shape, and the receiving side case body is formed in a hollow flat shape corresponding to the shape of the light emitting portion, and one of the receiving side case bodies in a thickness direction thereof. On the surface side, a light-transmitting portion that is made of a light-transmitting material and that transmits the light emitted by the light-emitting portion is formed, and the electric circuit board that constitutes the power feeding portion has the plate-shaped light-emitting portion, The vehicle luminous body unit according to claim 15, wherein the luminous body unit for a vehicle is housed in the receiving side case body in a state of being laminated on a plate surface side opposite to a surface facing the light transmitting portion. 17. In the transmitting unit, at least the transmitting side coil is housed in a case body, and the case body is provided with a predetermined attaching means at a position corresponding to the receiving side case body. The vehicle luminous body unit according to any one of claims 1 to 16, which is detachably attached to the inner surface. 18. The receiving / light emitting unit including the light emitting unit is attached to a plurality of locations on the vehicle, and in the transmitting unit, the transmitting side coil corresponds to each of the receiving / light emitting units. While the drive circuit unit is removably attached to the inner surface of the wall of the attachment target portion at a position where at least a part of the drive circuit unit is shared by the coil units, the output from the shared portion of the drive circuit unit Is distributed by the output distribution wiring portion to each of the transmission side coils.
7. The vehicle luminous body unit described in 7. 19. In the transmission unit, a plurality of coil units having a structure in which the transmission side coil is housed in a transmission side coil case body, and a wall portion of the attachment target portion at a position corresponding to each of the reception units. While the drive circuit section is detachably attached to the inner surface by the transmitting side coil attaching means, the shared portion of the drive circuit section is housed in a drive circuit section case body that is separate from the transmission side coil case body and is driven. The vehicle light emitter unit according to claim 18, wherein the vehicle circuit unit is a circuit unit, and the drive circuit unit is detachably attached to a predetermined portion in the vehicle by a drive circuit attachment unit. 20. The transmitting-side coil mounting means and the drive-circuit-portion mounting means include the transmitting-side coil case body or the drive-circuit-portion case body, the mounting target portion or a predetermined portion in the conductor. 20. The vehicle light emitter unit according to claim 19, which is configured to include a double-sided adhesive layer that is fixed to the. 21. The drive circuit section of the transmission unit receives power from a battery mounted on the vehicle, and the transmission unit has a wiring cable for supplying power to the drive circuit section. A vehicle-side wiring portion provided at the end of the wiring cable for supplying electric power from the battery to a predetermined electric power supply destination in the vehicle, and detachably coupled to an intermediate portion thereof, and the coupling. 21. The vehicle light emitter unit according to claim 1, further comprising: a connector portion that distributes electric power passing through the vehicle-side wiring portion to the wiring cable in a state. 22. The vehicle is an automobile, and the attachment target portion is a rear bumper of the automobile.
1. The vehicle light emitter unit according to any one of 1.