JP3398880B2 - Wireless power transmission device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power transmission device for transmitting power and data between two contactless electric circuits using electromagnetic induction.

[0002]

2. Description of the Related Art In a conventional power transmission device, power transmission from a fixed portion to a movable portion and data transmission from a movable portion to a fixed portion are performed by wire such as slip rings and connectors, and the movable portion is repeatedly operated. As a result, there were many problems caused by mechanical life such as wear of slip rings and disconnection of connectors.

Therefore, in recent years, a wireless power transmission apparatus using a contactless electromagnetic induction technique has been proposed (Japanese Patent Laid-Open No. 5-596).
No. 60 publication). This wireless power transmission device is a device that uses a pair of non-contact coils that are magnetically coupled and uses magnetic force as a medium for power transmission and data transmission.

Such a wireless power transmission device is applied to power transmission and data transmission with an industrial turntable or a pallet moving on a carrier line.

[0005]

However, in the above-mentioned conventional wireless power transmission device, the fixed part coupler and the movable part coupler are poor in assembling property, and the waterproof property and the heat dissipation property cannot be ensured, so that the long-term insulation property is deteriorated. Water becomes impossible to hold,
There is a problem that it is difficult to use in an environment where oil is scattered.

The present invention solves the above-mentioned conventional problems, and its purpose is to improve the assemblability, and to secure waterproofness and heat dissipation by a resin mold. And long-term insulation can be maintained,
It is to provide a wireless power transmission device which can be used in an environment where water and oil are scattered.

[0007]

In order to achieve the above object, a wireless power transmission apparatus according to the invention of claim 1 has a power transmission coil assembly on the power transmission side to transmit power. And a data receiving means for receiving data transmitted with a signal transmission coil assembly on the receiving side, and a transmission coil unit comprising the power transmission coil assembly on the power transmitting side and the signal transmission coil assembly on the receiving side. And a power receiving means for receiving the power transmitted from the power transmitting means and supplying the received power to the detector, and a signal transmitting coil assembly for the transmitting side. And a data transmission means for transmitting the detection data input from the detector to the data reception means, and a transmission coil for the power transmission coil assembly on the power receiving side and the signal transmission coil assembly on the transmission side. And a movable portion coupler constitutes a unit, the fixing unit mosquitoes flops la and the movable portion coupler,
A housing having a coil case to the front end portion, and the transmission coil unit, accommodates the connected substrate assembly to the transmission coil unit, the transmission Koiruyuni
Has a ferrite core, and the ferrite core
In addition to incorporating the coil of the power transmission coil assembly,
On the outside of the ferrite core of the signal transmission coil assembly
A coil is arranged, and further, a clamp case is attached to a rear end portion of the housing to lead out a lead wire connected to the substrate assembly, and the inside of the housing is filled with a molding resin. To do.

Accordingly, the assembly of the fixing portion mosquitoes flops la and the movable portion coupler are improved also ensuring waterproofness and heat dissipation by resin molding, it becomes possible long-term insulation property retention in addition It can be used in environments where water and oil are scattered.

In order to achieve the above object, a wireless power transmission device according to a second aspect of the present invention is the wireless power transmission device according to the first aspect, wherein the transmission coil unit is connected to the power transmission coil assembly. The spool is fitted in the spool fitting groove portion of the ferrite core, and the rib provided on the spool is passed through the through hole provided in the ferrite core to attach the ferrite core to the power transmission coil assembly. The ferrite core assembled with the assembly is fitted into the core fitting recess of the signal transmission coil assembly, and the rib is press-fitted into a press-fitting hole provided in the signal transmission coil assembly.

Therefore, not only the same operation as that of the above-mentioned invention of the first aspect can be achieved, but also the power transmission coil assembly, the ferrite core and the signal transmission coil assembly are integrated without using an adhesive. It is easy to realize the above, and the positioning and assembling workability of these three persons can be improved.

[0011] To achieve the above object, the wireless power transmission apparatus according to the third aspect of the present invention, in the wireless power transmission device according to claim 1 or 2, wherein said power transmission coil assembly, the rear side of the spool A terminal holding leg having an insertion groove is formed in a protruding manner on the spool, and the power transmission coil assembly is attached to the spool
While winding the three-dimensional coil, said first terminal is press-fitted on the rear end side of the insertion groove of the terminal holding legs, constituted by tying the terminals of the power transmission coil to the first terminal, the signal the transmission coil assembly, the insertion groove formed on the outer peripheral portion of the spool, as well as wound coils of the signal transfer coil assembly to the spool, the second terminal is pressed into the rear end side of the insertion groove , and configured to the second terminal tying the terminals <br/> coil of the signal transfer coil assembly, the ferrite and a coil of the power transmission coil set coil and the signal transmitting coil assembly of three-dimensional The cores are concentrically located inside and outside, and the first and second terminals are juxtaposed and projected to the rear of the signal transmission coil assembly, and each of the first and second terminals is Solder to the connection pattern on the surface of the board in the board assembly I just connected.

Therefore, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but also the terminals of the power transmission coil assembly and the terminals of the signal transmission coil assembly are connected to the substrate of the substrate assembly. The connection can be made firmly and easily, and the assembling workability can be improved.

[0013] To achieve the above object, the wireless power transmission apparatus according to the invention of claim 4, in the wireless power transmission device according to any one of claims 1 <br/> claim 3, wherein A heat shield member was arranged on the back side of the transmission coil unit, and a part of this heat shield member was brought into contact with the inner surface of the housing.

Therefore, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but also heat generated by heat generation of the coil of the power transmission coil assembly and the coil of the signal transmission coil assembly in the transmission coil unit. Can be transmitted (released) to the housing through the heat shield member to reduce the adverse effect of heat on the circuit section.

[0015] To achieve the above object, the wireless power transmission apparatus according to an invention of claim 5, in the wireless power transmission device according to any one of claims 1 to <br/> claim 4, wherein A pair of engagement groove portions is formed in the inner peripheral portion of the clamp case along the axial direction of the clamp case, and these engagement groove portions are positioned on one side of a straight line passing through the center (center position) O of the clamp case, On the inner peripheral portion of the case, a protrusion which is positioned on a line perpendicular to the straight line passing through the center O of the clamp case and serving as a monitoring portion of the light emitting body is formed.

Therefore, not only can the same effects as those of the above-mentioned invention of the first aspect be exerted, but also it is possible to prevent the board assembly from being inserted into and engaged with the clamp case in the opposite direction, and at the same time, the protrusion of the clamp case. The illuminator provided on the back side of the substrate assembly is automatically and accurately positioned, the alignment of the illuminator is not necessary, and the lighting state of the illuminator can be reliably viewed.

[0017] To achieve the above object, the wireless power transmission apparatus according to the invention of claim 6, in the wireless power transmission device according to any one of claims 1 to <br/> claim 5, wherein outside the substrate assembly, winding and insulating tape so as to cover the electronic components mounted on the substrate assembly, the first and the second time when filling in several mold resin in said housing The insulating tape was present at the boundary.

[0018] Therefore, when filling Separating the only or several times a molding resin into the housing can achieve the same operation and effects of the invention of claim 1 described above, the in first and second boundary Due to the presence of the insulating tape, the air bubbles generated by the filling of the mold resin are stopped in the middle part of the insulating tape, and in the case of long-term use, water enters between the housing and the mold resin, and this water causes the air bubbles to form. It is possible to prevent the electric power from being transmitted and reaching the connection pattern of the board assembly to cause insulation failure. By blocking with the insulating tape in this way, even if bubbles are generated, there is no continuity and it can be used for a long time.

Further, in order to achieve the above object, the wireless power transmission device according to the present invention as claimed in claim 7, in the wireless power transmission device according to any one of claims 1 <br/> claim 6, wherein A recess was formed in the middle of the inner peripheral surface of the housing, into which the mold resin filled in the housing entered in a cured state.

Therefore, not only can the same effects as those of the above-mentioned first aspect of the present invention be exhibited, but when the molding resin is filled in the housing and cured, the resin contracts and the difference in the coefficient of linear expansion from the housing. However, there is a problem that the resin molding portion falls off, but the mold resin enters the recess and the resin molding portion cannot come off.

Further, in order to achieve the above object, the wireless power transmission apparatus according to the invention of claim 8, in the wireless power transmission device according to any one of claims 1 to <br/> claim 7, power A volume adjuster for adjusting the frequency of the oscillation circuit for transmission and the frequency of the power transmission resonance circuit is arranged on the clamp case attachment side of the housing.

Therefore, not only can the same effects as those of the above-mentioned first aspect of the invention be achieved, but a resonance circuit including an oscillation circuit, a capacitor and a coil is formed. However, when a resin is molded, a parasitic capacitance is generated and the resin is removed. Even if the volume is adjusted before molding, readjustment is required after molding the resin. For this reason, it becomes possible to readjust the volume adjuster using a tool such as a driver after the first molding resin is filled and cured, and the resonance deviation between the capacitor and the coil is finely adjusted accurately. be able to.

Further, in order to achieve the above object, the wireless power transmission device according to the present invention as claimed in claim 9, in the wireless power transmission device according to any one of claims 1 to <br/> claim 8, wherein The core wire of the lead wire was inserted into the through hole of the board of the board assembly and soldered to the connection pattern on the back side of the board.

Therefore, not only can the same effects as those of the above-mentioned invention of the first aspect be exerted, but also in a bad environment where water or the like is present, water enters from the joint portion between the lead wire and the mold resin during long-term use, Although it reaches the soldering part of the core wire along the lead wire, if the core wire of the lead wire is inserted into the through hole of the board and soldered to the connection pattern on the back side of the board, the time for insulation failure is significantly extended. be able to.

In order to achieve the above object, the wireless power transmission device according to the invention of claim 10 does not include the wireless power transmission device of claim 1 .
In the wireless power transmission device according to claim 9, the coil of the signal transmission coil assembly is wound once.

Therefore, not only the same operation as that of the above-mentioned first aspect of the invention can be achieved, but also by winding the signal transmission coil once, the parasitic capacitance between the coil wires when the resin is molded can be reduced. Can be reduced.

In order to achieve the above-mentioned object, the wireless power transmission device according to the invention of claim 11 does not include claim 1 .
In the wireless power transmission device according to any one of to claims 10, provided with viewing opening of the coil in front of the spool of the power transmission coil assembly.

[0028] Thus, not only can achieve the same operation and effects of the invention of claim 1 described above, even after assembling the power transmission coil assembly to said signal transfer coil assemblies and the ferrite core, from the peephole You can see the coil and see how many turns it has.

[0029]

1 is an explanatory view showing the arrangement of a power transmission / reception coil and a data transmission / reception coil of a wireless power transmission apparatus according to the present invention.

[0030] In FIG. 1, 1 is fixed portions Ca-flop la, 2 is a movable part Ca-flop la attached to the movable body such as a rotating body or moving body (not shown).

[0031] In the fixed part Ca-flop la 1, 3 power transmission coil, the data receiving coil 4, 5 transmission part, 6 a data reception unit, 7 denotes a ferrite core. The power transmission coil 3 and the power transmission unit 5 form a power transmission unit, and the data reception coil 4 and the data reception unit 6 form a data reception unit.

[0032] In the movable portion Ca flop la 2, 8 receiving coil, the data transmission coil 9, 10 receiving unit, 11 is a data transmission unit, 12 denotes a ferrite core. The power receiving coil 8 and the power receiving unit 10 form a power receiving unit, and the data transmitting coil 9 and the data transmitting unit 11 form a data transmitting unit.

The power transmission coil 3 is built in the ferrite core 7, and the data receiving coil 4 is arranged outside the ferrite core 7. The power receiving coil 8 is built in the ferrite core 12, and the data transmitting coil 9 is arranged outside the ferrite core 12.

According to the wireless power transmission device of the present invention having the power transmission / reception coil and the data transmission / reception coil, the power wirelessly transmitted from the power transmission coil 3 is received by the power reception coil 8, and the received power is received by the power reception unit. The detector is attached to the movable body and supplies it to a detector (not shown) that detects the position of the movable body, whether or not an object is placed on the movable body, and the data detected by this detector is transmitted to the data transmission unit. 1
The data is transmitted by the data transmission coil 9 via 1. This transmission data is received by the data receiving coil 4 and output to the outside via the data receiving unit 6.

Here, the power transmission frequency, that is, the frequency of the power transmitted from the power transmission coil 3 is several hundred kHz, and the carrier frequency of data transmission, that is, the carrier frequency of the data transmitted from the data transmission coil 9 is , Several MHz, which is one digit away from the carrier frequency of power transmission, is used.

The power transmission and the data transmission are properly performed when the power transmission / reception coil and the data transmission / reception coil are opposed to each other and the opposed interval is 5 to 10 [mm].

As described above, the power transmitting coil 3 and the power receiving coil 8 are built in the ferrite cores 7 and 12, and the data receiving coil 4 and the data transmitting coil 9 are connected to the ferrite core 7,
12 the data receiving coil 4
In the above, in the data transmission unit 11, the influence of the magnetic field caused by transmitting electric power from the power transmission coil 3 is reduced, and the weak magnetic field of the detection data transmitted from the data transmission coil 9 is easily received. It is possible to simplify the configuration of the filter circuit (not shown) that separates the detection data and the transmission power component sneak from the power transmission coil 3 from the signal received by the data reception coil 4. Also can be made compact fixing unit mosquitoes flops la 1 and the movable portion mosquito flop La 2.

Next, a specific configuration of the wireless power transmission device according to the present invention will be described.

Since the fixed part coupler 1 and the movable part coupler 2 have different internal structures with respect to the contents of electronic parts mounted on the substrate and most of the configurations are the same, the fixed part coupler 1 is mainly used. The configuration will be described.

As shown in FIG. 3, the fixed part coupler 1 includes a coil case 20, a cylindrical housing 21, and a transmission coil unit (power transmission coil assembly 23, ferrite core 7, signal transmission coil assembly 24) 22. The substrate assembly 25 and the clamp case 26 are generally configured.

The coil case 20 has a cap shape made of synthetic resin, the front end surface of which is closed, and a fitting portion 20a is provided at the rear portion thereof. The housing 21 has a hollow cylindrical housing body 21A, and the threaded portion 2 is provided on the outer peripheral surface of the housing body 21A.
7, the coil case fitting part 28 on the inside of the front part,
Clamp case fitting portions 29 are formed inside the rear portions, respectively, and a ring-shaped recess 30 extending in the circumferential direction is formed in the middle of the inner peripheral surface of the housing body 21A (see FIG. 8).

The transmission coil unit 22 comprises a power transmission coil assembly 23, a ferrite core 7 and a signal transmission coil assembly 24. That is, the power transmission coil assembly 23 has a spool 31 shown in FIGS. 11 to 13, and this spool 31 has a spool body 32 in which flange portions 31B and 31C are formed at both ends of a tubular portion 31A. The front side flange portion 31B of the spool body 32 is provided with a peep hole 33 on the left and right.
Is formed on the rear surface side of the flange portion 31C, and terminal holding legs 34 that form ribs are formed on the left and right sides of the flange portion 31C. An insertion groove portion 35 is formed, and the front end portion of the insertion groove portion 35 communicates with the inside of the spool body 32 via a notch portion 36 formed in the flange portion 31C. The power transmission coil 3 is wound around the tubular portion 31A of the spool body 32, and the terminal 38 is press-fitted into the insertion groove portion 35 of the terminal holding leg 34 from the rear end side thereof. The terminal of the power transmission coil 3 is tied to the terminal 38 of the.

The signal transmission coil assembly 24 is shown in FIG.
16 has a spool 39, and this spool 39 is provided with a spool main body 41 in which a partition wall 39B is provided inside a tubular portion 39A and a core fitting recess 42 is provided in front of this partition wall 39B. A coil winding groove 43 is formed on the outer peripheral surface of the tubular portion 39A, and a terminal holding leg insertion hole 44, which is a square press-fitting hole, is vertically positioned in the partition wall 39B. A frame 45 reaching the rear end of the spool body 41 is formed in each of the terminal holding leg insertion holes 44. An insertion groove portion 46 having a dovetail-shaped cross section is formed on the outer peripheral portion of the spool body 41 so as to be located outside the terminal holding leg insertion hole 44, and the front end portion of these insertion groove portions 46 is the coil winding. It reaches the diversion groove 43, and the rear end of the insertion groove 46 reaches the rear end surface of the spool body 41. Also, the partition 3
A round hole 47 is formed on the left and right sides of 9B.

The data receiving coil 4 is further wound in the coil winding groove portion 43, and a terminal 49 is press-fitted into the insertion groove portion 46 from the rear end side thereof. The terminal of the data receiving coil 4 is tied to 49.

The ferrite core 7 is shown in FIGS.
As shown in FIG. 8, the core main body 50 has a solid cylindrical body, and the core main body 50 is provided on the front surface of the core main body 50.
A ring-shaped spool fitting groove portion 51 centered on the center of is formed, and square through holes 52 are formed above and below the bottom surface portion of the spool fitting groove portion 51.

The spool 31 of the power transmission coil assembly 23 is connected to the spool fitting groove 5 of the ferrite core 7.
1 and fits the terminal holding leg 34 into the through hole 52.
The ferrite core 7 is assembled to the power transmission coil assembly 23 by penetrating the power transmission coil assembly 23, and the ferrite core 7 to which the power transmission coil assembly 23 is assembled is fitted into the core fitting recess 42 of the signal transmission coil assembly 24. The transmission coil unit 22 is constructed by inserting (press-fitting) the terminal holding legs 34 into the terminal holding leg insertion holes 44.

In this case, the power transmission coil 3 of the power transmission coil assembly 23 and the data reception coil 4 of the signal transmission coil assembly 24 are concentrically located inside and outside with the ferrite core 7 in between, and the signal transmission is performed. At the rear of the coil assembly 24, the terminals 38 and 49 are juxtaposed side by side and projected. Further, the number of turns of the power transmission coil 3 can be seen from the peep hole 33.

The board assembly 25 includes a first board 53 and a second board 54, and a pair of connection patterns 55 and 56 are formed on the left and right of the front end of the front surface of the first board 53. The second substrate 54 is connected to the first substrate 53 via the connector 57. Further, the left and right corners of the rear portion of the first substrate 53 are formed into the hypotenuse portions 58,
A volume adjuster 59 is mounted on the rear end of the surface of the first substrate 53. The first and second substrates 5
All the necessary electronic components (not shown) are mounted on 3, 54.

The clamp case 26 is made of transparent synthetic resin, and has a large-diameter fitting portion 60, a small-diameter lead wire insertion portion 61, the fitting portion 60 and the lead wire as shown in FIGS. An engagement groove portion 63 is formed between the insertion portion 61 and a conical crossover portion 62. The engagement groove portion 63 extends axially of the clamp case 26 and is located on the left and right sides of the fitting portion 60. The engaging groove portions 63 are located below a horizontal line (straight line) a passing through the center (center position) O of the clamp case 26. Further, the transition portion 62 is formed with a protrusion 64 which is located on a vertical line B passing through the center O of the clamp case 26 and protrudes inward. This protrusion 64 is on the back side of the first substrate 53. This is for viewing the lighting state of the light emitting diode 65 which is a light emitting body provided in the rear part.

Then, the terminal 3 protruding rearward of the signal transmission coil assembly 24 of the transmission coil unit 22.
8 and 49 are connected to the connection patterns 55 and 56 on the surface of the first substrate 53 by soldering, and the substrate assembly 25 is connected to the transmission coil unit 22. A heat shield member 66 is arranged on the back side of the transmission coil unit 22 as shown in FIG. 6, and the heat shield member 66 has a configuration in which a closing plate portion 68 is arranged at an end portion of a cylindrical body 67. The closing plate portion 68 is located behind the power transmission coil 3 of the power transmission coil assembly 23 and the data reception coil 4 of the signal transmission coil assembly 24. An insulating tape 69 is wound on the outside of the front portion of the board assembly 25 so as to cover the electronic components.

Then, at the front end of the housing 21,
The coil case 20 is mounted by fitting the fitting portion 20a into the coil case fitting portion 28 of the housing 2
The transmission coil unit 22 and the substrate assembly 25 are inserted in the unit 1, and the cylindrical body 67 of the heat shield member 66 is in contact with the inner surface of the housing 21. In this state, the housing 21 is filled with the mold resin 70 for the first time, and the transmission coil unit 22, a part of the substrate assembly 25, and the heat shield member 66 are hardened with the cured mold resin 70. In this case, the filling of the mold resin 70 for the first time is up to the intermediate level a of the insulating tape 69.
This is because the air bubbles 71 generated by the first filling of the molding resin 70 are stopped in the middle portion of the insulating tape 69.
This is so that the volume adjuster 59 mounted on the substrate 53 can be readjusted (see FIG. 8).

In this way, after the first molding resin 70 is filled to the level a and cured, the volume adjuster 5
9 is readjusted, the lead wire 72 is inserted into the lead wire insertion portion 61 of the clamp case 26 via the grommet 73A, and the core wire 73 of the lead wire 72 is set to the first position as shown in (1) of FIG. The core wire 73 is soldered to the connection pattern 75 on the back side of the first substrate 53 by inserting the through hole 74 of the substrate 53.

Then, the left and right edges of the first substrate 53 are inserted into and engaged with the engaging groove portions 63 of the clamp case 26, and the fitting portion 60 of the clamp case 26 is fitted into the clamp case of the housing 21. The second molding resin 70 is filled in from the lead wire insertion portion 61 of the clamp case 26 and fitted in the joining portion 29, and is cured.

According to the above-described embodiment, the assemblability of the fixed part coupler 1 and the movable part coupler 2 is improved, and the resin mold ensures the waterproof property and the heat dissipation property, and the long-term insulation is also ensured. It is possible to maintain the property and it can be used in an environment where water and oil are scattered. In addition, it becomes easy to integrate the power transmission coil assembly 23, the ferrite core 7 and the signal transmission coil assembly 24 without using an adhesive, and these three can be positioned and assembled easily. Can be improved.

Mold resin 70 is placed in the housing 21.
When the resin is filled in two times, the insulating tape 69 is present at the boundary between the first time and the second time, and the intermediate level a is set to insulate the bubbles 71 generated by the filling of the mold resin 70. When the tape 69 is stopped at an intermediate portion and water is used for a long period of time, water enters between the housing 21 and the molding resin 70, and the water is transmitted through the bubbles 71 to the first substrate 53.
This is to prevent the insulation pattern from reaching the connection pattern and causing insulation failure. By thus blocking with the insulating tape 69, even if bubbles 71 are generated, there is no continuity and it can be used for a long time.

Further, the volume adjuster 59 is for adjusting the frequency of the oscillation circuit 76 for power transmission and the frequency of the resonance circuit for power transmission as shown in FIG. That is, as shown in FIG. 9, the oscillation circuit 76 and the capacitor 77
However, if the resin is molded as described above, the parasitic capacitance 78 is generated, and even if the volume is adjusted before the resin is molded, the readjustment is required after the resin is molded. Therefore, as shown in FIG. 8, after the first molding resin 70 is filled up to the level a and cured, the volume adjuster 59 is readjusted using a tool such as a screwdriver.
It is possible to precisely finely adjust the resonance shift between the power transmission coil 7 and the power transmission coil 3.

A ring-shaped recess 30 extending in the circumferential direction is formed in the middle of the inner peripheral surface of the housing body 21A. When the first molding resin 70 is filled and cured, the molding resin 70 is formed. Enters into the concave portion 30 and the resin molding portion does not come off. That is, when the first molding resin 70 is filled and cured, there is a problem that the resin molding portion falls out due to the shrinkage of the resin and the difference in the coefficient of linear expansion from the housing. The molded part will not come off.

The core wire 73 of the lead wire 72 is inserted into the through hole 74 of the first substrate 53 as shown in FIG. 10A, and then the connection pattern 75 is formed on the back side of the first substrate 53. Is soldered to. Note that FIG.
No. 0 (2) shows the core wire 7 of the conventional lead wire 72.
In the connection structure of No. 3, the core wire 73 is connected to the first substrate 53.
Is directly soldered to the connection pattern 75 on the front side.

In a bad environment where water or the like is applied, water enters from the joint between the lead wire 72 and the molding resin 70 for a long period of use and travels along the lead wire 72 to reach the soldered portion of the core wire 73. The core wire 73 to the first substrate 53
Insulation defects occur early when soldered directly to the front side connection pattern 75, whereas the core wire 73 of the lead wire 72 is inserted into the through hole 74 of the first board 53 and When soldering to the connection pattern 75 on the back side, it is possible to significantly extend the time during which insulation failure occurs.

In the clamp case 26,
By disposing the engaging groove portion 63 for engaging the first substrate 53 with the clamp case 26 below the horizontal line a passing through the center (center position) O of the clamp case 26, the substrate assembly 25 is reversed. The insertion and engagement are prevented, and the light emitting diode 65 provided on the rear side of the back side of the first substrate 53 is provided on the protrusion 64 of the clamp case 26.
Will automatically position itself. Therefore, it is not necessary to align the light emitting diode 65, and the lighting state of the light emitting diode 65 can be surely seen.

[0061]

As described above, according to the wireless power transmission device according to the invention of claim 1, there is provided a power transmission coil assembly on the power transmission side for transmitting power and a signal on the reception side. A fixed part coupler having a transmission coil assembly and receiving data transmitted, and a transmission coil unit including the power transmission coil assembly on the power transmission side and the signal transmission coil assembly on the reception side. And a power receiving means for receiving the power transmitted from the power transmitting means and supplying the received power to the detector, and a signal transmitting coil assembly for the transmitting side. A transmission coil unit that includes a power transmission coil assembly on the power receiving side and a signal transmission coil assembly on the transmission side, and a data transmission unit that transmits the detection data input from the detector to the data reception unit. And a movable part coupler, the fixed part coupler and the movable part coupler are housed in a housing having a coil case at a tip end thereof, the transmission coil unit and a substrate assembly connected to the transmission coil unit. At the same time, the transmission coil unit has a ferrite core, the coil of the power transmission coil assembly is built in the ferrite core, and the coil of the signal transmission coil assembly is arranged outside the ferrite core. By mounting a clamp case on the rear end of the housing to lead out the lead wire connected to the board assembly and filling the inside of the housing with a molding resin, the fixed part coupler and the movable part The coupler is easy to assemble, and the resin mold ensures waterproofness and heat dissipation. Become possible insulating retention, water, allows the use in environments where oil is scattered.

According to a second aspect of the present invention, there is provided the wireless power transmission device according to the first aspect, wherein the transmission coil unit is a spool of the power transmission coil assembly and a ferrite core spool is a spool. While fitting in the fitting groove portion, the rib provided on the spool is passed through the through hole provided in the ferrite core, the ferrite core is assembled to the power transmission coil assembly, and the power transmission coil assembly is assembled. The ferrite core is fitted in a core fitting recess of the signal transmission coil assembly, and the rib is press-fitted into a press-fitting hole provided in the signal transmission coil assembly. Not only can the same effects as the effects of the invention be achieved, but the power transmission coil assembly, the ferrite core, and the signal transmission coil assembly can be combined. It makes it easy to integrate without using Chakuzai, it is possible to improve the positioning accuracy and assembly workability of these three.

According to a third aspect of the present invention, there is provided the wireless power transmission device according to the first or second aspect, wherein the power transmission coil assembly has an insertion groove portion on the rear surface side of the spool. The terminal holding leg is formed to project, the coil of the power transmission coil assembly is wound around the spool, and the first terminal is press-fitted to the rear end side of the insertion groove portion of the terminal holding leg, The terminal of the power transmission coil is wound around the terminal, the signal transmission coil assembly is formed, an insertion groove is formed in the outer peripheral portion of the spool, and the coil of the signal transmission coil assembly is wound around the spool. At the same time, press fit the second terminal to the rear end side of the insertion groove,
A coil terminal of the signal transmission coil assembly is entwined with the second terminal, and the coil of the power transmission coil assembly and the coil of the signal transmission coil assembly are concentric with the ferrite core interposed therebetween. Are located inside and outside, and the first and second terminals are juxtaposed and projected rearward of the signal transmission coil assembly, and each of the first and second terminals is connected to a surface of a board in the board assembly. By connecting to the pattern by soldering, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also the terminal of the power transmission coil assembly and the terminal of the signal transmission coil assembly are The board assembly can be firmly connected to the board, and the assembly workability can be improved easily.

Further, according to the wireless power transmission device of the invention of claim 4, in the wireless power transmission device of any one of claims 1 to 3, a heat shield member is provided on the back side of the transmission coil unit. By disposing the heat shield member and bringing a part of the heat shield member into contact with the inner surface of the housing, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also the power transmission in the transmission coil unit. The heat generated by the heat generated by the coils of the coil assembly and the coil of the signal transmission coil assembly can be transferred (released) to the housing through the heat shield member to reduce the adverse effect of the heat on the circuit unit.

According to a fifth aspect of the present invention, there is provided the wireless power transmission device according to any of the first to fourth aspects, wherein the clamp is provided on the inner peripheral portion of the clamp case. A pair of engagement groove portions is formed along the axial direction of the case, and these engagement groove portions are located on one side of a straight line passing through the center (center position) O of the clamp case, and the clamp case is provided on the inner peripheral portion of the clamp case. By forming the projection that serves as the monitoring portion of the light emitting body by being positioned on the line perpendicular to the straight line through the center O, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also It is possible to prevent the board assembly from being inserted into and engaged with the clamp case in the opposite direction, and to automatically and accurately position the light emitter provided on the back side of the board assembly on the protrusion of the clamp case. , Combined the light emitter is not required, it can be seen reliably lighting state of the light emitter.

According to a sixth aspect of the present invention, there is provided a wireless power transmission device according to any one of the first to fifth aspects, wherein the board is provided outside the board assembly. An insulating tape was wound so as to cover the electronic parts mounted on the assembly, and the insulating tape was present at the boundary between the first and second times when the mold resin was filled into the housing in several times. As a result, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but when the mold resin is filled into the housing several times, the insulating tape is provided at the boundary between the first and second times. Due to the presence of air bubbles, the air bubbles generated by the filling of the mold resin are stopped in the middle part of the insulating tape, and in the case of long-term use,
It is possible to prevent water from entering between the housing and the mold resin, the water being transmitted through the bubbles to reach the connection pattern of the substrate assembly to cause insulation failure. By blocking with the insulating tape in this way, even if bubbles are generated, there is no continuity and it can be used for a long time.

According to the wireless power transmission device of the invention of claim 7, in the wireless power transmission device of any one of claims 1 to 6, the wireless power transmission device is provided in the middle of the inner peripheral surface of the housing. By forming the recess into which the mold resin filled in the housing enters in the cured state,
Not only can the same effects as those of the invention of claim 1 described above be exhibited, but when the molding resin is filled in the housing and hardened, the resin molding portion is formed due to the shrinkage of the resin and the difference in the linear expansion coefficient with the housing. Although there is a problem of falling off, the mold resin enters the concave portion, and the resin molded portion cannot come off.

The wireless power transmission device according to the invention of claim 8 is the wireless power transmission device according to any one of claims 1 to 7, wherein the frequency of the oscillation circuit for power transmission and the power transmission resonance circuit. By arranging the volume adjuster for adjusting the frequency on the mounting side of the housing on the clamp case, not only the same effect as the effect of the above-described invention can be obtained, but also the oscillation circuit, the capacitor, and the coil. However, when the resin is molded, a parasitic capacitance is generated, and even if the volume is adjusted before the resin is molded, the readjustment is required after the resin is molded. For this reason, it becomes possible to readjust the volume adjuster using a tool such as a driver after the first molding resin is filled and cured, and the resonance deviation between the capacitor and the coil is finely adjusted accurately. be able to.

According to a ninth aspect of the present invention, there is provided the wireless power transmission device according to any one of the first to eighth aspects, wherein the core wire of the lead wire is the substrate assembly. Insert into the through hole of the board of
By soldering to the connection pattern on the back side of the substrate, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also in a bad environment where water or the like is applied, the lead wire and the molding resin are used for a long period of time. Water enters from the joint with and reaches the soldering part of the core wire along the lead wire, but when the core wire of the lead wire is inserted into the through hole of the board and soldered to the connection pattern on the back side of the board, It is possible to significantly extend the time during which insulation becomes defective.

According to a tenth aspect of the present invention, there is provided the wireless power transmission apparatus according to any one of the first to ninth aspects, wherein the signal transmission coil is wound further. In addition to achieving the same effects as the effects of the invention of claim 1 described above, by further winding the coil of the signal transmission coil assembly,
It is possible to reduce the parasitic capacitance between the coil wires when the resin is molded.

The wireless power transmission apparatus according to the invention of claim 11 is the wireless power transmission apparatus according to any one of claims 1 to 10, wherein a coil is provided on the front surface of the spool of the power transmission coil assembly. By providing the peephole, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also after the power transmission coil assembly is assembled to the ferrite core and the signal transmission coil assembly. The coil can be seen through the peephole, and the number of turns of this coil can be confirmed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an arrangement of a power transmission / reception coil and a data transmission / reception coil of a wireless power transmission device according to the present invention.

FIG. 2A is a side view of a wireless power transmission device according to the present invention. (2) is an arrow view from the direction A of (1).

FIG. 3 is a perspective view of the wireless power transmission device according to the present invention in an exploded state.

FIG. 4 is a plan view showing a partial cross section of a fixed part coupler of the wireless power transmission apparatus.

5 is a view from the direction B in FIG.

FIG. 6 is a side view showing a partial cross section of a fixed part coupler of the wireless power transmission apparatus.

FIG. 7 is an enlarged view of a C portion of FIG.

FIG. 8 is an explanatory diagram for explaining filling of a mold resin in the fixed part coupler of the wireless power transmission device.

FIG. 9 is a circuit diagram showing an oscillation circuit for power transmission, a power transmission resonance circuit, and a volume adjuster in the wireless power transmission device.

FIG. 10A is an explanatory diagram of a connection structure of a lead wire to a substrate in the wireless power transmission device of the present invention. (2) is an explanatory view of a connection structure of a lead wire to a substrate in a conventional wireless power transmission device.

FIG. 11 is a front view of the spool of the power transfer coil assembly.

FIG. 12 is a plan view of the spool.

FIG. 13 is a rear view of the spool.

FIG. 14 is a front view of the spool of the signal transmission coil assembly.

FIG. 15 is a rear view of the spool.

FIG. 16 is a partial cross-sectional plan view of the spool.

FIG. 17 is a front view of a ferrite core.

FIG. 18 is a partial cross-sectional plan view of the ferrite core.

FIG. 19 is a front view of the clamp case.

FIG. 20 is a rear view of the clamp case.

FIG. 21 is a vertical sectional view of the clamp case.

22 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

First fixing portion month flop La 2 movable section coupler 20 coil case 21 housing 22 transmission coil unit 25 substrate assembly 26 clamp case 70 mold resin 72 lead

Continuation of the front page (56) Reference JP-A-6-177803 (JP, A) JP-A-2-305233 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B 5 / 00-5/02

Claims (11)

(57) [Claims] 1. A power transmission means having a power transmission coil assembly on the power transmission side for transmitting electric power, and a data reception means having a signal transmission coil assembly on the reception side for receiving data transmitted. Moreover, the power transmission coil assembly on the power transmission side and the signal transmission coil assembly on the reception side have a fixed portion coupler that constitutes a transmission coil unit, and the power transmission coil assembly on the power reception side, and power is transmitted from the power transmission means. Power receiving means for receiving electric power and supplying the received power to the detector; and data transmitting means for transmitting the detection data input from the detector to the data receiving means, having a signal transmission coil assembly on the transmission side. the provided and a movable portion coupler constitutes the transmission coil unit with the power transmission coil assembly of the power receiving side and signal transfer coil assembly on the transmission side, the fixing portion mosquitoes flops la and the movable portion coupler, A housing having a coil case to the front end portion, and the transmission coil unit, accommodates the connected substrate assembly to the transmission coil unit, the transmission Koiruyuni
Has a ferrite core, and the ferrite core
In addition to incorporating the coil of the power transmission coil assembly,
On the outside of the ferrite core of the signal transmission coil assembly
A coil is arranged, and further, a clamp case is attached to a rear end portion of the housing to lead out a lead wire connected to the substrate assembly, and the inside of the housing is filled with a molding resin. Wireless power transmission device. The method according to claim 2, wherein the transmission coil unit, with fitting the spool of the power transmission coil assembly to the spool fitting groove of the ferrite core, the ribs provided on the spool in a through hole provided on the ferrite core Let it penetrate
Assembling the ferrite core to the power transmission coil assembly, the ferrite core is assembled to the power transmission coil assembly, along with fits to the core fitting recess of the signal transfer coil assembly, the signal transmitting said ribs The wireless power transmission device according to claim 1, wherein the wireless power transmission device is configured to be press-fitted into a press-fitting hole provided in the coil assembly. 3. The power transmission coil assembly, wherein a terminal holding leg having an insertion groove is projectingly formed on the rear surface side of the spool, and the coil of the power transmission coil assembly is wound on the spool. While turning, the first terminal is press-fitted to the rear end side of the insertion groove portion of the terminal holding leg, and the terminal of the power transmission coil is entwined with the first terminal to form the signal. the transmission coil assembly, the insertion groove formed on the outer peripheral portion of the spool, as well as wound coils of the signal transfer coil assembly to the spool, the second terminal is pressed into the rear end side of the insertion groove ,
A coil terminal of the signal transmission coil assembly is entwined with the second terminal, and the coil of the power transmission coil assembly and the coil of the signal transmission coil assembly are concentric with the ferrite core interposed therebetween. Are located inside and outside, and the first and second terminals are juxtaposed and projected rearward of the signal transmission coil assembly, and each of the first and second terminals is connected to a surface of a board in the board assembly. The wireless power transmission device according to claim 1 or 2, wherein the pattern is soldered and connected. 4. Place the heat shield member on the back side of the transmission coil unit, the radio according to a portion of the heat shield member to any one of claims 1 to 3 is brought into contact with the inner surface of the housing Power transmission equipment. The inner peripheral portion of claim 5 wherein said clamping casing, the straight line the engaging groove along the axial direction of the clamp case a pair formed, passing through the center (center position) O of these engagement grooves the clamping casing on the other hand, is positioned, the the inner peripheral portion of the clamp casing, said claims 1 to forming the projections to be monitored portion of the light emitters through the center O of the clamping casing is positioned in a line perpendicular to the straight line Any of item 4
The wireless power transmission apparatus according to. 6. A case where an insulating tape is wound on the outside of the board assembly so as to cover electronic components mounted on the board assembly, and the molding resin in the housing is filled several times. first and the wireless power transmission device according to any one of the second of claims 1 to 5 wherein the insulating tape was present in the boundary portion. 7. A middle of the inner peripheral surface of the housing, any one of claims 1 to 6 filled mold resin within the housing is a recess from entering the cured state
The wireless power transmission apparatus according to. 8. any of claims 1 to 7 volume regulator disposed in said clamp casing mounting side of the housing for adjusting the frequency of the frequency and the power transmission resonant circuit of the oscillator circuit of the power transfer the wireless power transmission apparatus according to. The core of claim 9 wherein said lead wire, said substrate set is inserted into the three-dimensional of the through hole in the substrate, the claims 1 to 8 soldered to the connection pattern in the back side of the substrate
The wireless power transmission device according to any one of 1 . 10. A wireless power transmission device according to any one of the signal transmission coil set of claim 1 to claim 9 steric coil was further wound and. 11. The method of claim 1 to claim 1 provided with viewing opening of the coil in front of the spool of the power transmission coil assembly
0. The wireless power transmission device according to any one of 0.