JP2000260642A - Electromagnetic induction type connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electromagnetic type connector which can supply power with a stable power supply efficiency. SOLUTION: A secondary core 25 has a cylinder 25A and a back wall 25B, the back wall 25B is formed with a shaft insert hole 25C, and a primary core 28 has a circular closure plate 23A a shaft member 28B projected therefrom. The both cores 25 and 28 are set so that, in a connector coupled state, the closure plate 23A is positioned at a side deeper than a front end face 25D of the cylinder 25A, and a tip end of the shaft member 28B is projected as passed through the back wall 25B. As a result, even when the both cores 25 and 28 vary in their length dimensions or in the insertion depths of the cores, there will occur no variations in the junction area of the both cores 25 and 28 magnetically coupled and in the gap dimension between junction faces, whereby power supply can be carried out with a stable efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electromagnetic induction type connector.

[0002]

2. Description of the Related Art As an example of an electromagnetic induction type connector, a connector disclosed in Japanese Utility Model Laid-Open No. 6-44301 used for charging an electric vehicle is known. As shown in FIG. 6, the connector includes a secondary connector 2 disposed in a receiving portion 3 provided in a vehicle, and a primary connector 1 that can be inserted into the receiving portion 3. As shown in FIG. 7, the secondary core 3 provided in the secondary connector 2 has a bottomed cylindrical shape, while the primary core 4 provided in the primary connector 1 has a cylindrical portion 4B from a disk portion 4A. It has a protruding structure. When the connector is connected, the disk portion 4A of the primary core 4 is formed.
The lower surface S1 of the secondary core 3 abuts against the open end surface S2 of the secondary core 3, and the distal end surface T1 of the columnar portion 4B of the primary core abuts against the inner surface T2 of the secondary core 3. A closed magnetic circuit is formed. When the primary coil 1A provided in the primary connector 1 is excited in this state,
The secondary coil 2 of the secondary connector 2 is generated by the generated magnetic flux.
An induced electromotive force is generated at A. Also, as shown in FIG. 6, a J-slot 5 is formed on the primary side, and a projection 6 to be engaged with the J-slot 5 is provided on the secondary side in order to hold the two cores 3 and 4 in a connected state. Have been.

[0003]

The above-described conventional electromagnetic induction type connector has a structure in which the cores 3 and 4 are abutted and joined to each other. Due to the clearance between the slot 5 and the projection 6, the abutting surfaces of both cores 3 and 4 (S1 and S2 in FIG. 7,
In addition, there is a problem in that the gap size between T1 and T2) varies, which results in unstable power supply efficiency.

The present invention has been made in view of the above circumstances, and has as its object to provide an electromagnetic induction type connector capable of supplying power with stable power supply efficiency.

[0005]

In order to achieve the above object, the invention according to claim 1 is characterized in that a primary connector having a primary coil unit and a secondary connector having a secondary coil unit are connected. In an electromagnetic induction type connector in which a closed magnetic circuit is formed by both the primary and secondary cores provided in each coil unit and electric power can be supplied from the primary side to the secondary side, one of the two cores is used. Is provided with a back wall in a tubular body extending in the coupling direction of the connector, and has a structure in which a shaft insertion hole is formed through the back wall, and the other core is fitted inside a front end opening of the tubular body. A structure in which a shaft body whose tip is inserted into a shaft insertion hole is protruded from a closing plate closing the front end opening, and both cores are in a state where the connector is connected, the closing plate is located on the back side of the front end surface of the cylindrical body. Located in
In addition, it is characterized in that the tip of the shaft body is set to protrude through the inner wall.

The invention according to claim 2 is characterized in that, in the electromagnetic induction type connector according to claim 1, the cylindrical body, the shaft insertion hole, the closing plate, and the shaft are formed in concentric circular cross sections. .

[0007]

When the connector is connected, as shown in FIG. 3, the outer peripheral surface of the closing plate of the other core and the inner peripheral surface of the cylindrical body of one core are connected. The outer peripheral surface of the shaft body of the other core and the inner peripheral surface of the shaft insertion hole of the one core are magnetically coupled facing each other in the proximity state. Here, in the present invention,
Both cores in the connected state are configured so that the closing plate is located on the back side of the front end surface of the cylindrical body and the tip of the shaft body protrudes through the back wall, so that the length dimensions of the cores and the cores Even if the insertion depth of the cores varies, there is no variation in the joint area of the two cores magnetically coupled and the gap size between the joint surfaces, so that power can be supplied with stable efficiency.

<Invention of claim 2> Since the cylindrical body of one core, the shaft insertion hole, and the closing plate and the shaft of the other core are formed in concentric circular sections, the connector is connected. And can be rotated with respect to one connector and the other connector.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a rear end portion of a so-called one-box type automobile. The present invention is used to connect a power line between a pivotable vehicle door 10 provided at the rear end portion and a vehicle body 11. Is used.

On the left side of the rear end face of the vehicle body 11, a pair of rotating shafts 13, 13 project upward and downward to approach each other. The vehicle door 10 is rotatably connected to the vehicle body 11 by being engaged with the upper and lower ends.

The vehicle door 10 is provided with a rectangular glass window 15 on the upper side, and a pair of blinkers 40, 40 on the left and right on the lower side (see FIGS. 1 and 5; Is shown only). The glass window 15 is provided with a wiper 16 having a rotating shaft disposed below the glass window 15. The wiper 16 receives power from a motor 17 built in the vehicle door 10 and swings right and left. Further, the vehicle door 10 is provided with a drive circuit unit 18 (see FIG. 5) in which a drive circuit of the motor 17 and a drive circuit of the blinker 40 are integrated.

As shown in FIG. 1, an electromagnetic induction type connector 22 according to the present invention is disposed in an intermediate portion of the vehicle door 10 between the two pivots. As shown in FIG. 2, the electromagnetic induction type connector 22 includes a primary connector 23 fixed to the vehicle body 11 and a vehicle door 1.
And the secondary side connector 24 fixed to 0.

The secondary connector 24 is buried in an upper part of a recess 20 formed in an intermediate portion of the vehicle door 10 sandwiched between the rotating shafts 13 and 13, and the primary connector 23 is coupled from below. It is supposed to be. Secondary connector 2
The secondary core 25 provided in 4 is formed by sintering ferrite powder, for example, and has a back wall 25B at the upper end of a vertically extending cylindrical body 25A, and a shaft insertion hole 25C is formed through the back wall 25B. Make The cylindrical body 25 </ b> A and the shaft insertion hole 25 </ b> C have concentric circular cross-sections, and their axes coincide with the center of rotation of the vehicle door 10. The secondary coil 26 wound in an air-core cylindrical shape is housed at a position deeper than the front end face 25D disposed on the lower side of the cylindrical body 25A. The electric wire constituting the secondary coil 26 is drawn into the vehicle door 10 and is connected to a power line extending from the drive circuit unit 18 (see FIG. 5).

On the other hand, the primary connector 23 is connected to the vehicle body 1.
1, a projection 21 protruding from the rear end toward the recess 20.
It is fixed to the upper surface of. The primary core 28 provided in the primary connector 23 is also formed by sintering ferrite powder, for example, and the closing plate 2 fixed to the upper surface of the projection 21.
8A and a cylindrical shaft body 2 protruding from the closing plate 28A.
8B, and a primary coil 29 is wound around the shaft 28B. The closing plate 28A and the shaft body 28B have concentric circular cross-sections, and their axes are
The rotation axis of the vehicle door 10 coincides with the rotation axis. Further, the electric wire constituting the primary coil 29 is connected to an inverter 35 (see FIG. 5) provided in the vehicle body 11. When the vehicle door 10 is assembled to the vehicle main body 11, the primary and secondary connectors 23 and 24 are connected to each other, and as shown in FIG. 3, the primary core closing plate 28A is located on the lower side of the secondary core. Is inserted into the inside of the front end opening 25E arranged in the shaft body 2 to close the front end opening 25E.
8B is inserted into the shaft insertion hole 25C. More specifically, when the electromagnetic induction type connector 22 is in the coupled state, the closing plate 28A of the primary core 28 is located on the back side of the front end face of the cylindrical body 25A of the secondary core 25, and the primary core 2
The tip of the shaft body 28B of No. 8 is set to protrude through the back wall 25B of the secondary core 25.

FIG. 5 shows the electrical configuration of the vehicle. A control circuit 33 provided in the vehicle body 11 receives a command to activate the wiper 16 and a command to turn on the left and right turn signals 40, and receives a power supply device. Inverter 35 connected to 34
Is activated to excite the primary coil 29. Further, a signal line between the vehicle body 11 and the vehicle door 10 is an optical communication between the light projecting element 32 provided at the rear end of the vehicle body 11 and the light receiving element 30 correspondingly provided on the vehicle door 10. It is to be done by.

Next, the operation of this embodiment having the above configuration will be described. The electromagnetic induction type connector 22 of the present embodiment includes:
When the vehicle door 10 is assembled to the vehicle main body 11, the vehicle door 10 is connected to the secondary connector 24 with the primary connector 23 inserted therein. Then, as shown in FIG. 3, the outer peripheral surface S3 of the closing plate 28A of the primary core 28 and the inner peripheral surface S4 of the cylindrical body 25A of the secondary core 25 face each other in a close state and are magnetically coupled together. Shaft 2 of primary core 28
8B and the inner peripheral surface T4 of the shaft insertion hole 25C of the secondary core 25 face each other in a close state and are magnetically coupled.
As a result, a closed magnetic circuit penetrating both the coils 26 and 29 is formed by the primary and secondary cores 25 and 28, and the power lines of the vehicle body 11 and the vehicle door 10 are connected via the electromagnetic induction type connector 22. Connected.

For example, when the driver operates a switch lever (not shown) of the blinker 40, the following operation is performed. That is, the command is given to a control circuit 33 provided in the vehicle body 11, and the control circuit 33 activates the inverter 35 connected to the power supply device 34 to excite the primary coil 29 and to transmit an optical signal from the light emitting element 32. Send. Then, the magnetic flux penetrates the secondary coil 26 through the magnetic circuit formed by the two cores 25 and 28, and an induced electromotive force is generated in the secondary coil 26. This is converted into a direct current by a rectifier circuit (not shown) provided in the drive circuit unit 18. On the other hand, the optical signal emitted from the light emitting element 32 is received by the light receiving element 30 of the vehicle door 10, and the received signal is taken into the drive circuit unit 18. Then, based on the received signal, a DC current is supplied to the lamp of the blinker 40, and the lamp blinks. Here, in the electromagnetic induction type connector 22 of the present embodiment, the cylindrical body 25A, the shaft insertion hole, the closing plate 28A, and the shaft 28B are formed in a concentric circular cross section, and these shafts are connected to the vehicle door 10. Therefore, the secondary connector 24 can be rotated with respect to the primary connector 23 in a state where the connectors are connected. Therefore, for example, both the blinkers 40, 40 can be turned on and off in order to call attention while the vehicle door 10 is opened. In addition, the driver operates the wiper 16.
Is turned on, the above blinker 4
It operates similarly to the case of 0.

Incidentally, the cores 25 and 28 may have variations in length dimension and mutual insertion depth (FIG. 4 shows a state where the core is inserted deeper than the state shown in FIG. 3). ing). However, the joining surface of the two cores 25 and 28 in the electromagnetic induction connector 22 of the present embodiment (FIG. 3)
4 and S3 and S4, and T3 and T in FIG.
4) faces in a direction perpendicular to the connector coupling direction, so that even if the length or insertion depth of the core varies, the gap between the joining surfaces does not vary. Moreover,
In the two cores 25 and 28 in the connected state, the closing plate 28A is located on the back side of the front end face 25D of the cylindrical body 25A, and the shaft 2
Since the distal end of the core 8B is set to protrude through the inner wall 25B, even if the length and insertion depth of the core vary, the joint area where the cores 25 and 28 are magnetically coupled does not vary.

As described above, according to the electromagnetic induction type connector 22 of the present embodiment, there is no variation in the joint area where the cores 25 and 28 are magnetically coupled and the gap size between the joint surfaces. Power can be supplied with stable power supply efficiency. In addition, since the electromagnetic induction type connector 22 is connected in a non-contact manner, there is no need to worry about the turning resistance of the vehicle door 10 and the wear of the connecting portion.

<Other Embodiments> The present invention is not limited to the above embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
In addition to the following, various changes can be made without departing from the scope of the invention.

(1) The electromagnetic induction type connector 22 according to the above-described embodiment is arranged at the turning portion of the vehicle door 10.
It may not be necessarily a rotating part, and may be used for line connection between parts fixed to each other.

(2) In the above embodiment, the secondary connector 24 is rotatable inside the primary connector 23 in a state where the connectors are connected. However, the secondary connector 24 may not be rotatable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rear end of an automobile according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the electromagnetic induction type connector in a detached state.

FIG. 3 is a side sectional view of the connected state.

FIG. 4 is a side sectional view showing a state in which the insertion depth varies.

FIG. 5 is a block diagram showing an electric configuration of the automobile.

FIG. 6 is a perspective view showing a conventional electromagnetic induction type connector.

FIG. 7 is a side sectional view showing the connection state;

[Explanation of symbols]

 22 ... Electromagnetic induction type connector 23 ... Primary connector 24 ... Secondary connector 25 ... Secondary core 25A ... Cylinder 25B ... Back wall 25C ... Shaft insertion hole 25D ... Front end face 25E ... Front end opening 28 ... Primary core 28A ... Blocking plate 28B: Shaft

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Chen No. 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5G003 BA01 DA02 DA15 FA01 FA06 GA10 GB06 GB08 5H115 PG04 PO09 PO16

Claims (2)

[Claims] When a primary connector having a primary coil unit and a secondary connector having a secondary coil unit are connected, a magnetic circuit closed by both primary and secondary cores provided in each coil unit. In an electromagnetic induction type connector that can supply power from the primary side to the secondary side, one of the two cores has a back wall in a cylindrical body extending in a coupling direction of the connector, and The shaft has a structure in which a shaft insertion hole is formed through the back wall, and the other core is inserted into the inside of the front end opening of the cylindrical body, and the tip is inserted into the shaft insertion hole from a closing plate closing the front end opening. The core has a structure in which the closing plate is located on the back side of the front end face of the tubular body, and the distal end of the shaft is located on the back side when the connector is connected. It is set to protrude through the wall An electromagnetic induction type connector, characterized in that: 2. The electromagnetic induction type connector according to claim 1, wherein the cylindrical body, the shaft insertion hole, the closing plate, and the shaft are formed in concentric circular cross sections.