JP2002280241A - Electromagnetic induction type connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic induction type connector which can perform efficient power supply (or signal transmission), even if a gap exists between the primary coil unit and the secondary coil unit. SOLUTION: The primary coil unit 13 is equipped with the first core bodies 16 and 16' in a pair, which have primary cores 20 and 20' as the first cores and primary coils 21 and 21' as the first coils, and it is constituted, such that the first core bodies 16 and 16' in a pair are counterposed and separated by a specified gap between each other. The secondary coil unit 15 is equipped with the second core bodies 18 and 18', in a pair which have the secondary cores 25 and 25' as the second cores and the secondary coils 26 and 26' as the second coils and is constituted, such that the second core bodies 18 and 18' in a pair are arranged separately on the surface and rear of the secondary coil unit, and they can be freely inserted into or removed from the specified gap.

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 in which two members are brought close to each other to supply power or transmit a signal from one of the two members to the other by mutual induction.

[0002]

2. Description of the Related Art In FIG. 3, as an electromagnetic induction type connector of this type, a connector used when power is supplied between a vehicle body 1 and a door 2 is well known. That is, a primary coil unit 3 constituting an electromagnetic induction type connector is provided at the boarding port of the vehicle body 1. The door 2 that opens and closes the boarding gate is provided with a secondary coil unit 4 that also forms an electromagnetic induction type connector.

[0003] The primary coil unit 3 includes a primary core 5 and a primary coil 6.
When an AC voltage is applied to the primary core 5, a magnetic flux is generated in the primary core 5. Further, the secondary coil unit 4 includes a secondary core 7 and a secondary coil 8, and a magnetic path in which a magnetic flux generated in the primary core 5 returns to the primary core 5 through the secondary core 7 is formed. When formed, an induced electromotive force is generated in the secondary coil 8.

[0004]

In the above prior art, if there is a gap between the primary coil unit 3 and the secondary coil unit 4, the power supply (or signal transmission) efficiency is shifted left and right. However, there is a problem that the efficiency is significantly reduced as compared with the efficiency reduction due to the above.

That is, if one of the primary coil unit 3 and the secondary coil unit 4 is shifted in the X direction and the Y direction with respect to the other (see FIG. 4 (a); Efficiency is 75% when there is no shift in both X and Y directions, 1 m in both X and Y directions
74% efficiency when a displacement of m occurs, 73% efficiency when a displacement of 2 mm occurs in both the X and Y directions, and 70% efficiency when a displacement of 3 mm occurs in both the X and Y directions. In the case where a shift of 4 mm occurs in both the X and Y directions, the efficiency is 62% (Z shown in FIG. 4B).
Direction gap GZ is set to GZ = 0 mm).

A gap GZ in the Z direction between the primary coil unit 3 and the secondary coil unit 4 (FIG. 4)
(B)), the efficiency at that time is 75% in the case of no gap (GZ = 0 mm), and the gap G
70% efficiency at Z = 1mm, 6 at GZ = 2mm
The efficiency was 6%, the efficiency was 59% when the gap GZ was 3 mm, and the efficiency was 47% when the gap GZ was 4 mm (there is no displacement in the X and Y directions).

The present invention has been made in view of the above-mentioned circumstances, and has an electromagnetic induction type capable of efficiently supplying power (or transmitting signals) even when a gap exists between a primary coil unit and a secondary coil unit. It is an object to provide a connector.

[0008]

According to the first aspect of the present invention, there is provided an electromagnetic induction connector according to the first aspect of the present invention, wherein two members are brought close to each other and power is supplied from one of the two members to the other by mutual induction. An electromagnetic induction type connector including the one-side primary coil unit and the other-side secondary coil unit for supplying or transmitting a signal, wherein any one of the primary coil unit and the secondary coil unit Either one comprises a pair of first core bodies having a first core and a first coil, and has a configuration in which each of the pair of first core bodies is arranged to face each other at a predetermined interval,
A configuration in which one of the second cores includes a pair of second cores having a second core and a second coil, and each of the pair of second cores is disposed on the front and back sides of the other one. And can be freely inserted and removed within the predetermined interval.

According to a second aspect of the present invention, there is provided an electromagnetic induction type connector according to the first aspect, wherein the pair of first core bodies are embedded in one of the first and second core bodies. It is characterized in that a pair of second core bodies are also embedded in one of the other.

According to the present invention as set forth in claim 1,
One of the primary coil unit and the secondary coil unit is inserted between a pair of first core bodies provided in one of the primary coil unit and the secondary coil unit, and power is supplied. Alternatively, a signal is transmitted. Further, when one of the pair of first core bodies is pulled out and separated from the other between the pair of first core bodies, power supply or signal transmission is stopped. When power supply or signal transmission is performed, one first core body and one second core body face each other, and the other first core body and the other second core body face each other. . Even if a gap is generated and the space between one first core body and one second core body is widened and the efficiency related to power supply (or signal transmission) therebetween is reduced, the other first core body and the other one are not. The space between the second core member and the second core member is narrowed, and the efficiency between them is increased, thereby covering the reduced efficiency. Further, even if a gap is generated and the space between the other first core body and the other second core body is widened and the efficiency therebetween is reduced, the space between the one first core body and the one second core body is reduced. It becomes narrow and the efficiency increases during that time, covering the efficiency decrease.

According to the second aspect of the present invention,
When any one of the primary coil unit and the secondary coil unit is inserted between the pair of first core bodies of any one of the primary coil unit and the secondary coil unit, The body does not interfere with the pair of second core bodies.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the electromagnetic induction type connector of the present invention. 2A and 2B are external perspective views of the electromagnetic induction type connector, FIG. 2A is an external perspective view when power is not supplied, and FIG. 2B is an external perspective view when power is supplied.

In FIG. 1, reference numeral 11 indicates an electromagnetic induction type connector. The electromagnetic induction type connector 11
A primary coil unit 13 provided at a boarding opening 12 of a vehicle body (corresponding to one of the two members described in the claims) of an automobile, and a door of the vehicle (a two-member (Corresponding to the other of the above) and a secondary coil unit 15 provided at the edge portion 14. The electromagnetic induction type connector 11 of the present embodiment is configured such that when the primary coil unit 13 and the secondary coil unit 15 come close to each other, power is supplied from the vehicle body to the door by mutual induction (signal transmission may be performed). Is performed. Further, the electromagnetic induction type connector 11 of the present embodiment is configured such that even if a gap in the arrow GZ direction exists between the primary coil unit 13 and the secondary coil unit 15, the loss due to the gap can be suppressed. Have been.

The primary coil unit 13 has a pair of first core members 16 and 16 ′ and a primary coil unit main body 17 fixed to the boarding port 12. In addition, the secondary coil unit 15 includes a pair of second core members 18 and 18 ′ that are close to the pair of first core members 16 and 16 ′ when the door is closed with respect to the vehicle body.
And the secondary coil unit body 1 fixed to the edge 14
9.

The first core body 16 includes a primary core 20 as a first core and a primary coil 21 as a first coil.
And is configured. The primary core 20 is formed by sintering ferrite powder, for example, and has an annular groove 22 having a concave cross section on one surface. The primary coil 21 is formed by winding an electric wire, and is accommodated in the annular groove 22. On the other hand, the first core body 16 'also includes a primary core 20' as a first core and a primary coil 21 'as a first coil (including an annular groove 22'). The primary cores 20 and 20 'are formed in an E-shape in cross section, but may be in a U-shape.

The primary coil unit main body 17 includes:
It is formed of a synthetic resin having an insulating property and capable of transmitting a magnetic force, and includes a base 23 and a pair of core housings 24, 24. Base 23
Is formed in a thick rectangular plate shape, and is embedded and fixed in the boarding port 12. Further, the core body accommodating portions 24, 24
Are formed so as to protrude parallel to each other from both ends of the base 23.

A predetermined interval is formed between the core body accommodating portions 24, 24, so that the secondary coil unit 15 can be inserted and removed (see FIG. 2). In addition, first core bodies 16 and 16 ′ are embedded on the inner surface side (opposing surface side) of the core body housing portions 24 and 24, respectively, so that the one surface faces the first core bodies 16 and 16 ′. Although it is possible to project 16 'from the inner surface, it is completely embedded in this embodiment in order to avoid interference with the second core members 18 and 18' of the secondary coil unit 15).

The second core member 18 is similar to the first core member 16 and has a secondary core 25 as a second core.
And a secondary coil 26 as a second coil. The secondary core 25 is formed by sintering ferrite powder, for example, and has an annular groove 27 having a concave cross section on one surface. Also, the secondary coil 2
6 is formed by winding an electric wire, and is accommodated in the annular groove 27. On the other hand, the second core body 1
8 'also includes a secondary core 25' as a second core and a secondary coil 26 'as a second coil (including an annular groove 27'). The secondary cores 25, 2
5 'is formed in an E-shape in cross section, but may be in a U-shape. It shall be formed according to the shape of the primary cores 20, 20 '.

The secondary coil unit main body 19 includes:
It is formed in a flat plate shape from a synthetic resin having an insulating property and capable of transmitting a magnetic force. Further, second core bodies 18 and 18 ′ are embedded in the distal end side and the front and back sides of the secondary coil unit main body 19, respectively, with their directions being reversed (the second core bodies 18 and 18 ′ are arranged in the above-described manner). Although it is possible to protrude from the back surface, it is completely embedded in the present embodiment in order to avoid interference with the first core bodies 16 and 16 ′ of the primary coil unit 13).

In the above configuration, when the door is opened with respect to the vehicle body, as shown in FIG. 2A, the primary coil unit 13 and the secondary coil unit 15 are opened.
When the door is closed with respect to the vehicle body, the secondary coil unit 15 is inserted between the core body accommodating portions 24, 24 of the primary coil unit 13 so that the door is closed. , A power supply from the vehicle body to the door is started (FIG. 2).
(B)).

That is, when the door is closed with respect to the vehicle body, as shown in FIG. 1, the first core body 16 of the primary coil unit 13 and the second core body 18 of the secondary coil unit 15 are opposed to each other. And the first core body 16 'of the primary coil unit 13 and the secondary coil unit 1
The fifth second core body 18 ′ is arranged to face the second core body 18 ′. Then, mutual induction occurs between the first core body 16 and the second core body 18 and between the first core body 16 'and the second core body 18', and power is supplied from the vehicle body to the door. Is started.

The first core member 16 and the second core member 1 have been described above.
8 and GZ1 and GZ in the direction of the arrow GZ between the first core body 16 'and the second core body 18'.
This is an example in which 2 is equal.

If the secondary coil unit 15 is shifted upward in FIG. 1, the gap GZ1 is small,
2 becomes larger (GZ1 <GZ2), the efficiency of power supply between the first core body 16 'and the second core body 18' decreases, but the first core body 16 ' Core body 1
8, the efficiency of the power supply between the first core body 16 '
The efficiency loss between the first and second core bodies 18 'is covered.

On the other hand, when the secondary coil unit 15 is shifted downward and the gap GZ2 is small and the gap GZ1 is large (GZ1> GZ2), the first core 16
The efficiency related to the power supply between the first core body 16 ′ and the second core body 18 ′ increases, and the efficiency related to the power supply between the first core body 16 ′ and the second core body 18 ′ increases. The reduction in efficiency between the first and second core members 18 is covered.

Accordingly, even if a gap exists between the primary coil unit 13 and the secondary coil unit 15, it is possible to provide the electromagnetic induction type connector 11 in which efficient power supply (or signal transmission) is performed. Play.

In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the gist of the present invention. That is, the primary coil unit 13 and the secondary coil unit 15
May be interchanged. In the above, examples of the two members described in the claims are a vehicle body and doors (a driver seat, a passenger seat, or a rear seat door, a sliding door, a rear hatch), but are not limited thereto. I do. For example, a module body (instrument panel module, roof module, etc.) mounted on the vehicle body and the automobile,
A tuner and a speaker in audio are two members. Other examples include a door steering (separate body: steering portion) and an automobile seat (separate body: seat portion). The present invention can be applied to any two members that require power supply (or signal transmission) by electromagnetic induction.

[0027]

As described above, according to the first aspect of the present invention, even if a gap exists between the primary coil unit and the secondary coil unit, the loss due to the gap is suppressed. Can be. Therefore, there is an effect that power can be efficiently supplied (or transmitted).

According to the present invention as set forth in claim 2,
In addition to the effects of the first aspect of the invention, there is an effect that interference between the pair of first core bodies and the pair of second core bodies can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an electromagnetic induction type connector according to the present invention.

FIGS. 2A and 2B are external perspective views of the electromagnetic induction type connector of FIG. 1, in which FIG. 2A is an external perspective view when power is not supplied, and FIG.

FIG. 3 is a sectional view showing a conventional electromagnetic induction type connector.

4 (a) is a front view for explaining a left and right shift of the primary coil unit and the secondary coil unit of the electromagnetic induction type connector of FIG. 3 and a change in efficiency at that time, and FIG. 4 (b) is a front view of the primary coil unit and the secondary coil unit. FIG. 4 is a cross-sectional view for explaining a gap of a secondary coil unit and a change in efficiency at that time.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Electromagnetic induction type connector 12 Boarding gate 13 Primary coil unit 14 Edge part 15 Secondary coil unit 16, 16 'First core body 17 Primary coil unit main body 18, 18' Second core body 19 Secondary coil unit main body 20 , 20 ′ Primary core (first core) 21, 21 ′ Primary coil (first coil) 23 Base 24 Core body receiving part 25, 25 ′ Secondary core (second core) 26, 26 ′ Secondary coil (second coil)

Claims (2)

[Claims] 1. A primary coil unit on one side and a secondary coil unit on the other side for supplying power or transmitting a signal from one of the two members to the other by a mutual induction action by bringing the two members close to each other. An electromagnetic induction type connector provided, wherein one of the primary coil unit and the secondary coil unit includes a pair of first core bodies having a first core and a first coil, and Each of the one core bodies is arranged to face each other at a predetermined interval, and any one of the one core bodies includes a pair of second core bodies having a second core and a second coil, and the pair of second core bodies has a second core and a second coil. An electromagnetic induction-type connector, wherein each of the two-core bodies is arranged on one of the front and back surfaces of the other, and can be inserted and removed within the predetermined interval. 2. The electromagnetic induction type connector according to claim 1, wherein said pair of first core bodies are embedded in one of said one and said pair of second core bodies are also embedded in said one of said other. An electromagnetic induction type connector characterized by being embedded.