JP2003059737A - Electromagnetic-induction connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance power transfer efficiency of an electromagneticinduction connector. SOLUTION: A primary core 11 is provided with an annular yoke 12 and a pair of magnetic poles 13 protruding from the inner circumference of the yoke 12 toward the center and mutually facing to each other, and a primary coil 15 is wound around the magnetic poles 13. The primary core 11 and the primary coil 15 are molded with a synthetic resin or the like, forming a circular engaging space 14 between the magnetic poles 13. A secondary core 31, on which a secondary coil 32 is wound, is arranged on an engaging rod 35. By inserting the engaging rod 35 to the engaging space 14, both connectors 10, 30 are connected. Since the primary connector 10 is provided with the annular yoke 12, the magnetic flux efficiently passes through the yoke 12. Therefore, power transfer efficiency in both coils 15, 32 wound around the both cores 11, 31 is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction type connector.

[0002]

2. Description of the Related Art USP 540820 as an electromagnetic induction type connector
Those used for charging the electric vehicle shown in 9 are mentioned. In this connector, as shown in FIG. 12, a flat plate-shaped primary connector 1 is fitted in a flat plate-shaped receiving space 3 of a secondary connector 2. The secondary connector 2 is provided with a pair of secondary cores 4, and the pair of secondary cores 4 has a rectangular plate shape having a cylindrical magnetic pole portion 5 at the center, and one side of the secondary core 4 has a magnetic pole portion 5. It has a protrusion 6 protruding in the same direction as. When the pair of secondary cores 4 are opposed to each other, the protrusions 6 of the respective secondary cores 4 come into contact with each other to form magnetic flux passage portions between the secondary cores 4 and the primary magnetic pole portions 5 are provided between The receiving space 3 of the core 7 is formed.

On the other hand, the primary connector 1 comprises a circular plate-shaped primary core 7 and a primary coil 8 wound around the primary core 7. When the two connectors 1 and 2 are fitted together, the secondary coil 9 wound around the magnetic pole portion 5 of each secondary core 4 is magnetically coupled to the primary coil 8 to transfer power. ing.

[0004]

In the above-mentioned conventional connector, since the secondary connector 2 has the pair of secondary cores 4, the pair of secondary cores 4 is provided in addition to the contact surface with the primary core 7. A contact surface is generated between them. Therefore, there is a problem that the magnetic resistance increases and the power transmission efficiency deteriorates.

The present invention was completed in view of the above circumstances, and an object thereof is to provide an electromagnetic induction type connector having a good power transmission efficiency.

[0006]

[Means for Solving the Problems] As a means for achieving the above object, the invention of claim 1 is such that a primary connector having a primary coil wound around a primary core and a secondary coil mounted on a secondary core. A secondary connector formed by winding, and an electromagnetic induction type connector that magnetically couples both coils by fitting these two connectors, in one of the primary and secondary cores. The core includes an annular yoke portion and magnetic pole portions that protrude from the inner peripheral side of the yoke portion toward the center side and face each other, and at least one of the magnetic pole portions has the primary and secondary sides. One coil of both cores is wound to form a circular fitting space between the magnetic pole portions, and the other core of the primary and secondary cores is the core of the one core. Fitting that can be inserted into the fitting space between the magnetic poles Provided on the rod, the other coil of the other side said primary and secondary both cores in the core of the characterized by the place where it is wound.

A second aspect of the present invention is characterized in that, in the first aspect, the fitting rod is formed in a tapered shape.

The invention of claim 3 is the invention of claim 1 or claim 2.
The magnetic pole portion is characterized in that the magnetic pole portion is provided so as to be movable with respect to the yoke portion in a direction of advancing toward the fitting space side.

According to a fourth aspect of the present invention, in the third aspect, the connector provided with the fitting space is moved by abutting the fitting rod inserted into the fitting space. A pushing member is provided, and a cam mechanism is provided between the magnetic pole portion and the pushing member to displace the magnetic pole portion in a direction intersecting the moving direction of the pushing member based on the movement of the pushing member. There is a feature in that.

[0010]

<Operation and Effect of the Invention><Invention of Claim 1> One of the primary and secondary cores has an annular yoke portion and a pair of core portions protruding from the inner peripheral side toward the center side. Since it is composed of the magnetic pole portion, the magnetic flux generated by the coil wound around the magnetic pole portion efficiently passes through the annular yoke portion. As a result, the efficiency of power transmission between the coil wound around the other core of the primary and secondary cores and the coil wound around the magnetic pole portion is improved.

Further, the other core of the primary core and the secondary core and the coil wound around the core are provided on the fitting rod, and the core formed between the magnetic pole portions of the one core is fitted in a circular shape. Since they are fitted in the mating space, fitting of both connectors becomes easy.

<Invention of Claim 2> Since the tip of the fitting rod is tapered, it is easy to fit the fitting rod into the fitting space.

<Invention of Claim 3> The magnetic pole portion provided on the yoke portion of one of the primary and secondary cores is
Since it is provided so as to be movable with respect to the yoke part in the direction of advancing toward the fitting space provided between the magnetic pole parts, the magnetic pole is provided on the other core provided on the fitting rod that has entered the fitting space. The parts can be brought into close contact with each other. This improves the power transmission efficiency between the coil wound around the magnetic pole portion and the coil wound around the core provided on the fitting rod.

<Invention of Claim 4> The magnetic pole portion provided on one of the primary and secondary cores intersects the moving direction of the pushing member by the cam mechanism based on the movement of the pushing member. Since the magnetic pole portion is displaced in the direction, the magnetic pole portion can be configured to enter the fitting space when the fitting rod is inserted and to escape from the fitting space when the fitting rod exits. This allows
Since the magnetic pole can be brought into contact with the core of the fitting rod by fitting both connectors and no special operation is required to bring the magnetic pole and the core provided on the fitting rod into contact, The combination is easy.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. <First Embodiment> An electromagnetic induction type connector according to the present embodiment is shown in FIG. The present embodiment includes a primary connector 10 and a secondary connector 30 that are formed so as to be able to be fitted to each other.

As shown in FIG. 2, the primary connector 10 is formed of a synthetic resin material or the like into a cylindrical container shape so as to have a cylindrical peripheral wall portion 10A and a bottom wall portion 10B.
A substantially annular primary core 11 is provided coaxially with the peripheral wall portion 10A at an axially intermediate portion of the peripheral wall portion 10A. As shown in FIG. 3, the primary core 11 includes an annular yoke portion 12 and a pair of magnetic pole portions 13 having a shape protruding from the inner peripheral side of the yoke portion 12 toward the center side while facing each other. . The front end surfaces 13A of the pair of magnetic pole portions 13 form a cylindrical surface coaxial with the peripheral wall portion 10A, and a substantially cylindrical fitting space 14 for receiving the secondary connector 30 is formed between the pair of magnetic pole portions 13. .

A pair of primary coils 15 are wound around the pair of magnetic pole portions 13, and the primary coil 15 includes the magnetic pole portions 1.
It is provided along the inner circumference of the yoke portion 12 around the circumference 3. A lead wire 20 is drawn out from the primary coil 15 and is connected to a power supply device (not shown) to receive power supply. Primary core 11 and primary coil 1
5 is molded with, for example, a synthetic resin material to form a primary connector 10, and a substantially cylindrical accommodation hole 16 is formed inside the primary connector 10. The accommodation hole 16 has a cylindrical shape and a tapered shape that is thinner than the fitting space 14 in the inner part of the fitting space 14, and is larger than the fitting space 14 on the opening side of the fitting space 14, and is closer to the magnetic pole part 13. It has a long elliptical cross section. Further, a fitting detection pin 19 is provided on the bottom wall portion 10B, and when the secondary connector 30 is fitted, the fitting detection pin 19 pushes a limit switch 22 provided on the back surface to make the secondary detection. Connector 3
It is designed to detect the fitting of 0.

On the other hand, as shown in FIGS. 4 and 5, the secondary connector 30 is provided with a fitting rod 35 having a cylindrical shape and a tapered tip, and the fitting rod 35 is provided in the accommodation hole 1 of the primary connector 10.
It is designed to fit in 6. A cylindrical secondary core 31 is provided at an axially intermediate portion of the fitting rod 35 in a direction orthogonal to the axial direction.
It projects from 5. Both end surfaces of the secondary core 31 form a cylindrical surface coaxial with the fitting rod 35, and the secondary core 31 is positioned in the fitting space 14 of the primary core 11 when the connectors 10 and 30 are fitted to each other. , So as to face the magnetic pole portion 13. A secondary coil 32 is wound around the secondary core 31 and molded into a cylindrical shape with a synthetic resin material or the like to form a fitting rod 35. A lead wire 33 is drawn out from the secondary coil 32 similarly to the primary coil 15, and is connected to a load such as a battery unit (not shown).

An engaging recess 34 is formed on the outer peripheral surface of the fitting rod 35.
Is provided, and engages with a lock pin 21 which is an engaging protrusion provided on the inner peripheral surface of the primary connector 10 to lock both connectors 10, 30.

The present embodiment has the above structure, and its operation and effect will be described below. When the connectors 10 and 30 are fitted together, the fitting rod 35 is fitted into the housing hole 16 of the primary connector 10. Since the secondary core 31 projects from the cylindrical fitting rod 35 and the cross section of the front side of the accommodation hole 16 is an ellipse elongated in the direction of the magnetic pole portion 13, the primary connector 1
The angle of the fitting rod 35 with respect to 0 is regulated, and as shown in FIG. 6, the secondary core 31 faces the magnetic pole portion 13. As a result, the primary coil 15 and the secondary coil 32 are magnetically coupled, and it is possible to transfer power.

When the connectors 10 and 30 are fitted to each other, the lock pin 21 provided on the primary connector 10 is engaged with the engaging recess 34 of the secondary connector 30 as shown in FIG. The connectors 10 and 30 are locked. at the same time,
As shown in FIG. 1, the front end surface of the fitting rod 35 pushes the fitting detection pin 19, and the fitting detection pin 19 pushes the limit switch 22 provided on the rear surface of the connectors 10.
A mating of 30 is detected.

In this embodiment, since the primary core 11 is formed in an annular shape, the magnetic flux passes through the continuous primary core 11. Therefore, the magnetic resistance is low and both connectors 10,
The power transfer efficiency between the 30 is good.

The accommodation hole 16 including the fitting space 14 is formed in a substantially cylindrical shape, and the fitting rod 35 has a cylindrical shape. Therefore, since the fitting can be started without strictly determining the angles of the both connectors, the fitting of the both connectors 10 and 30 becomes easy.

Moreover, in this embodiment, since the tip end portion of the fitting rod 35 is tapered, the fitting of the connectors 10 and 30 is further facilitated.

<Second Embodiment> In this embodiment, a primary connector 40 is different from the first embodiment, and a secondary connector 30 is used.
Is the same as in the first embodiment. Therefore, the same parts are designated by the same reference numerals, and the duplicate description will be omitted.
The difference will be described with reference to.

As shown in FIGS. 8 and 9, the primary connector 40 in this embodiment has a cylindrical peripheral wall portion 40A and a bottom wall portion 4.
0B is formed in a cylindrical container shape from a synthetic resin material or the like, and a substantially annular primary core 41 is provided coaxially with the peripheral wall portion 40A at an axially intermediate portion of the peripheral wall portion 40A. The primary core 41 includes an annular yoke portion 42 and a pair of magnetic pole portions 43, and the yoke portion 42 is provided with a pair of openings 42A facing each other. The magnetic pole portion 43 has a substantially prismatic shape, and a columnar portion 44 is provided so as to project. A columnar portion 44 is tightly and slidably fitted in an opening 42A formed in the yoke portion 42, and the pair of magnetic pole portions 43 oppose each other from the inner peripheral side of the yoke portion 42 toward the center side. It is provided so as to project. The front end surfaces 43A of the pair of magnetic pole portions 43 form a cylindrical surface coaxial with the peripheral wall portion 40A, and a substantially cylindrical fitting space 54 for receiving the secondary connector 30 is formed between the pair of magnetic pole portions 43.

The primary coil 15 is wound around both the cylindrical portion 44 and the magnetic pole portion 43, and the primary coil 15 is provided along the inner circumference of the yoke portion 42. The primary core 41 and the primary coil 15 are molded with, for example, a synthetic resin material to form the primary connector 40,
Inside the primary connector 40, a housing hole 56 having a substantially cylindrical shape is formed.
Are formed. The shape of the accommodation hole 56 is substantially the same as the accommodation hole 16 of the first embodiment.

A spring housing chamber 45 is formed outside the magnetic pole portion 43 of the primary connector 40, and the opening 4 of the spring housing chamber 45 is formed.
6 is provided with a lid 47. A coil spring 48 is arranged between the outer peripheral side of the columnar portion 44 and the lid 47 in the spring accommodating chamber 45, and the coil spring 48 biases the magnetic pole portion 43 together with the columnar portion 44 toward the center of the primary connector 40. ing.

Guide recesses 49 forming a cam mechanism are provided on both sides in the circumferential direction of the magnetic pole portion 43 in parallel with the axial direction of the peripheral wall portion 40A, and the accommodating hole 5 is provided on the outer peripheral side of the guide recess 49.
A guide slope 50 is provided which approaches the opening end direction of 6 toward the center of the peripheral wall portion 40A. Primary connector 40
Is equipped with a pair of hook pins 51, which are pushing members,
A recess 57 for holding the hook pin 51 is provided inside the accommodation hole 56 from the guide groove 49 toward the inner part of the primary connector 40. The hook pin 51 is movably held in the recess 57 in parallel with the peripheral wall 40A, and the hook pin 51 and the recess 57 are held.
A coil spring 52 provided between and is always biased toward the opening end of the primary connector 40.

The cam portion 53, which is the tip of the hook pin 51, contacts the guide slope 50, and the cam portion 53 supports the magnetic pole portion 43 while contacting the guide slope 50 provided on the magnetic pole portion 43. . The hook pin 51 extends in the inner direction of the primary connector 40 from the guide slope 50, and then is accommodated in the accommodation hole 16 at the inner part of the accommodation hole 1.
6 is bent toward the center of the housing 6 and projects into the accommodation hole 16 to form a pressing portion 55. The hook pin 51 is moved in the depth direction of the primary connector 40 by the pressing portion 55 abutting and pressing by the tip portion of the fitting rod 35 fitted in the housing hole 56. Further, the lock pin 21 and the limit switch 22 are provided as in the first embodiment.

The present embodiment has the above structure, and its operation and effect will be described below. As shown in FIGS. 10 and 11, when the connectors 30 and 40 are fitted together, the pressing portion 55 of the hook pin 51 comes into contact with the tip end portion of the fitting rod 35, and the hook spring 51 compresses the coil spring 52 to allow the hook pin 51 to move. It moves to the back of 40. At that time, the cam portion 53, which is integral with the hook pin 51, moves in the rearward direction of the primary connector 40 together with the fitting rod 35. The guide slope 50 is supported by the cam portion 53, and the inner side of the primary connector 40 is closer to the peripheral wall portion 40.
Since it is away from the center of A, as the position of the cam portion 53 moves in the depth direction, the position of the guide slope 50 moves toward the center of the primary connector 40 while contacting the cam portion 53. As a result, the magnetic pole portion 43 has the hook pin 51 with the primary connector 40.
Since it moves toward the center of the primary connector 40 as it moves inward, the magnetic pole portion 43 comes into contact with the secondary core 31 when the connectors 10 and 40 are fitted together.

On the other hand, when the fitting of both connectors 10, 30 is released, the hook pin 51 pressed by the fitting rod 35 is released, and the hook pin 51 is moved toward the opening end of the primary connector 40 by the coil spring 52. Return. As a result, the hook pin 51
The cam portion 53 provided at the position presses the guide slope 50, and the operation reverse to that at the time of fitting is performed. As a result, the magnetic pole portion 43 moves in the direction away from the secondary core 31 to facilitate the removal of the secondary connector 30, and the primary connector 40 returns to the state of waiting for the secondary connector 30 to be fitted.

From the above operation, since the cores 31 and 41 are brought into close contact with each other only by fitting the connectors 10 and 40, the power transmission efficiency between the coils 15 and 32 is improved and the fitting operation is easy. Is. Also, both connectors 10, 4
Similarly, the operation is easy when the 0 fitting is released.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the first and second embodiments, the yoke portion 12,
An example in which the width of 42 is formed to be approximately the same as the width of the magnetic pole portions 13 and 43 is shown, but the width is not limited to this, and the width that covers the coils 15 and 32 of both connectors 10, 40 and 30 It can also be formed.

(2) In the first and second embodiments, the example in which the secondary core 31 is a cylindrical single is shown. However, the secondary core 3
1 is, for example, a shape that is long in the direction of the fitting rod, or
It is also possible to use a plurality of secondary cores, a primary core having a shape corresponding to the secondary cores, and both coils wound around the primary cores.

(3) In the second embodiment, the magnetic pole portion 4
Although the example in which 3 is brought into contact with the secondary core 31 by the cam mechanism has been shown, the magnetic pole portion 4 is driven by the biasing of the coil spring 48 without using the cam mechanism as well as the fitting of the secondary core 31.
The case where 3 is brought into contact with the secondary core 31 is also included in the technical scope of the present invention. Alternatively, after the fit is detected by the limit switch 22, the magnetic pole portions 13 and 43 may be driven by a motor or the like to bring the magnetic pole portions 13 and 43 into contact with the secondary core 31.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a fitted state of a primary connector and a secondary connector according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the primary connector according to the first embodiment before being fitted.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a side sectional view of the secondary connector according to the first embodiment in a state before mating.

FIG. 5 is a partially cutaway top view of the secondary connector according to the first embodiment before fitting.

6 is a sectional view taken along line VI-VI in FIG.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a side sectional view of the primary connector according to the second embodiment before being fitted.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a side sectional view of the primary and secondary connectors according to the second embodiment in a fitted state.

11 is a sectional view taken along line XI-XI of FIG.

FIG. 12 is a side sectional view and an exploded perspective view showing a conventional electromagnetic induction connector.

[Explanation of symbols]

10 ... Primary connector 11 ... Primary core 12 ... Yoke part 13 ... Magnetic pole 14 ... Fitting space 15 ... Primary coil 30 ... Secondary connector 31 ... Secondary core 32 ... Secondary coil 35 ... Mating rod

Claims (4)

[Claims] 1. A primary connector having a primary coil wound around a primary core, and a secondary connector having a secondary coil wound around a secondary core, and these connectors are fitted together. In the electromagnetic induction connector for magnetically coupling the both coils, one of the primary and secondary cores has an annular yoke portion and an inner peripheral side of the yoke portion toward a center side. A pair of magnetic poles that project and face each other, and one of the primary and secondary cores is wound around at least one of the magnetic poles, and a circular shape is provided between the magnetic poles. A fitting space is formed, the other core of both the primary and secondary cores is provided on a fitting rod that can be inserted into the fitting space between the magnetic pole portions of the one core, and the other core In the core, the other of both the primary and secondary cores Electromagnetic induction type connector, wherein a coil is wound. 2. The electromagnetic induction connector according to claim 1, wherein the fitting rod is formed in a tapered shape. 3. The electromagnetic induction type connector according to claim 1, wherein the magnetic pole portion is provided so as to be movable with respect to the yoke portion in a direction of advancing toward the fitting space side. . 4. A connector provided with the fitting space is provided with a pushing member that is moved by abutting the fitting rod inserted into the fitting space. 4. The electromagnetic induction according to claim 3, further comprising a cam mechanism provided between the member and the member for displacing the magnetic pole portion in a direction intersecting with a moving direction of the pushing member based on movement of the pushing member. Type connector.