JP2019185987A - Power supply connector, power receiving connector, and power supply system - Google Patents

Abstract

To provide a power supply connector, power receiving connector, and power supply system which can stably supply and receive electric power even in a circumstance where an external force such as oscillation is applied.SOLUTION: A power supply system 100 includes a power supply connector 20 for supplying electric power, and a power receiving connector 10 for receiving electric power supply. The power supply connector 20 comprises: first power supply terminals 27a to 27h including a plurality of terminals arranged in a circular or ring-type region; and second power supply terminals 28a to 28h including a plurality of terminals arranged in a ring-type region outside the first power supply terminals. The power receiving connector 10 includes a first circular or ring-type power receiving terminal 11, and a second ring-type power receiving terminal 12 arranged outside the first power supply terminal 11. The first power supply terminal 11 and the first power receiving terminals 27a to 27h have a first polarity, and the second power supply terminal 12 and the second power receiving terminals 28a to 28h have a second polarity.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply connector, a power reception connector, and a power supply system, and more particularly to a power supply connector, a power reception connector, and a power supply system that can stably perform power supply and power reception even in an environment where external force such as vibration is applied.

  Stable power supply to electric products (hereinafter referred to as power receiving devices) including portable terminal devices (referred to as power supply necessary for power receiving device operation, battery charging, etc., hereinafter simply referred to as power supply) Various devices (hereinafter referred to as power feeding devices) for performing the above-described have been proposed. In particular, a power feeding device and a power receiving device are known that have a circular or ring-type power feeding connector and a power receiving connector to improve the performance of maintaining contact of terminals.

  For example, Patent Document 1 discloses a power feeding connector and a power receiving connector that are robust against a specific rotational force. FIG. 13 is a plan view (a) (b) and a cross-sectional view (c) showing the structure of terminals of a power transmission connector 46 and a power reception connector 49 which are examples of such a power supply connector and a power reception connector. The power transmission connector 46 has a substantially disk shape, and has semi-ring-shaped power transmission terminals 47a (plus pole) and 47b (minus pole). The power receiving connector 49 is also substantially disk-shaped, and has a plurality of power receiving terminals 51a to 51f that are arranged apart from each other on the ring. When the power transmission connector 46 and the power reception connector 49 are coupled to face each other so that the centers of the circles are aligned with each other, about half of the power reception terminals 51a to 51f are connected to the power transmission terminal 47a (plus pole) and the other power reception terminals. Contacts the power transmission terminal 47b (negative pole). A diode is connected to each of the power receiving terminals 51a to 51f, and the power is supplied only when the polarity of the power transmitting terminal 47a or 47b in contact with the polarity of the diode matches.

  When the power transmission connector 46 and the power reception connector 49 rotate around an axis (Z axis in FIG. 13; hereinafter referred to as an insertion axis) that connects the centers of the circles, the power transmission terminal 47a or 47b and the power reception terminals 51a to 51b that are contact partners. The correspondence with 51f changes. However, since electricity is supplied to the power receiving terminals 51a to 51f having a polarity that matches the polarity of the power transmission terminal 47a or 47b from time to time, the possibility that the energized state is impaired is suppressed.

Japanese Patent Laid-Open No. 08-017538

  The device described in Patent Document 1 is robust against a moment around an insertion axis that acts between the power transmission connector 46 and the power reception connector 49. On the other hand, when a moment (a force that peels off the power transmission connector 46 and the power reception connector 49) about an axis perpendicular to the insertion axis (X axis or Y axis in FIG. 13) is applied, at least one of the power transmission terminals 47a or 47b. The power receiving terminals 51a to 51f that are energized are all separated, and the energized state may be lost.

  A moment around an axis perpendicular to the insertion axis may be generated by an external force such as vibration or gravity. Depending on the shape of the device including the power transmission connector 46 or the power reception connector 49, the positions of the power transmission connector 46 and the power reception connector 49 on the device, adverse effects due to the magnitude of the moment about the axis perpendicular to the insertion axis cannot be ignored.

  The present invention has been made to solve such problems, and provides a power feeding connector, a power receiving connector, and a power feeding system capable of stably feeding and receiving power even in an environment where an external force such as vibration is applied. The purpose is to do.

A power feeding system according to an embodiment of the present invention is a power feeding system including a power feeding connector for supplying power and a power receiving connector for receiving power supply, wherein the power feeding connector is circular or ring-shaped. A first power supply terminal including a plurality of terminals disposed in a region of the mold, and a second power supply terminal including a plurality of terminals disposed in a ring-shaped region outside the first power supply terminal; The power receiving connector includes a circular or ring-shaped first power receiving terminal, and a ring-shaped second power receiving terminal disposed outside the first power feeding terminal, One power supply terminal and the first power reception terminal have a first polarity, and the second power supply terminal and the second power reception terminal have a second polarity different from the first polarity. Features.
The power feeding system according to an embodiment of the present invention is characterized in that the power feeding connector and the power receiving connector are coupled by magnetic force.
In the power feeding system according to an embodiment of the present invention, the power feeding connector and the power receiving connector each combine the first power feeding terminal and the first power receiving terminal, and the second power feeding terminal and the first power receiving connector. It has a guide ring for coupling the two power receiving terminals.
A power supply connector according to an embodiment of the present invention is a power supply connector for supplying electric power, and includes a first power supply terminal including a plurality of terminals arranged in a circular or ring-shaped region, A second power supply terminal including a plurality of terminals disposed in a ring-shaped region outside the first power supply terminal, wherein the first power supply terminal has a first polarity, The second power supply terminal has a second polarity different from the first polarity.
A power receiving connector according to an embodiment of the present invention is a power receiving connector for receiving a supply of electric power, and is disposed outside a circular or ring-shaped first power receiving terminal and the first power feeding terminal. A ring-type second power receiving terminal, wherein the first power receiving terminal has a first polarity, and the second power receiving terminal has a second polarity different from the first polarity. It is characterized by.

  According to the present invention, it is possible to provide a power feeding connector, a power receiving connector, and a power feeding system that can stably feed and receive power even in an environment where external force such as vibration is applied.

1 is a perspective view showing an external appearance of a power receiving connector 10. FIG. 2 is a perspective view illustrating an appearance of a power supply connector 20. FIG. 3 is a plan view of the terminal surface side of the power receiving connector 10. FIG. FIG. 3 is a plan view of the power supply connector 20 on the terminal surface side. 3 is a cross-sectional view showing a state before connection between the power receiving connector 10 and the power feeding connector 20. FIG. FIG. 3 is a cross-sectional view showing a state after the power receiving connector 10 and the power feeding connector 20 are connected. 3 is a cross-sectional view of the power receiving connector 10. FIG. 2 is a cross-sectional view of a power supply connector 20. FIG. 4 is a plan view of the back side of the terminal surface of the power receiving connector 10. FIG. 3 is a plan view of the back side of the terminal surface of the power supply connector 20. FIG. 3 is a side view of the power receiving connector 10. FIG. 3 is a side view of the power supply connector 20. FIG. It is a figure which shows an example of the conventional power feeding connector and power receiving connector.

  A power feeding system 100 according to an embodiment of the present invention includes a power receiving device 1 and a power feeding device 2. The power receiving device 1 is a device that receives power supply from the power feeding device 2, and is, for example, a mobile terminal device. The power feeding device 2 is a device that supplies power to the power receiving device 1 and is, for example, a charger.

  The power receiving device 1 has a power receiving connector 10. The power feeding device 2 has a power feeding connector 20. The power receiving connector 10 and the power feeding connector 20 are energized when they are coupled, and power is supplied from the power feeding device 2 to the power receiving device 1.

  FIG. 1 is a perspective view showing an external appearance of the power receiving connector 10. FIG. 3 is a plan view of the power receiving connector 10 on the terminal mounting side (hereinafter referred to as a terminal surface). FIG. 9 is a plan view of the back side of the terminal surface of the power receiving connector 10. FIG. 11 is a side view of the power receiving connector 10.

  The outer shape of the power receiving connector 10 is substantially disk-shaped, and has a power receiving terminal 11, a power receiving terminal 12, an insulating portion 13, an insulating portion 14, a conducting wire 15, and a conducting wire 16 on the terminal surface side.

  The power receiving terminal 11 and the power receiving terminal 12 are conductors such as a metal plate. The shape of the power receiving terminal 11 is a circular or ring-shaped flat plate. The shape of the power receiving terminal 12 is a ring-shaped flat plate. The power receiving terminal 11 and the power receiving terminal 12 have different polarities. For example, the power receiving terminal 11 provided in the center is a positive pole, and the power receiving terminal 12 provided outside the power receiving terminal 11 is a negative pole. In other words, the circular power receiving connector 10 has a plurality of electrodes (power receiving terminal 11 and power receiving terminal 12) whose polarities change according to the distance from the center of the circle.

  The insulation part 13 and the insulation part 14 are insulators, such as resin. The insulating portion 13 is provided in a wall shape between the power receiving terminal 11 and the power receiving terminal 12. The insulating portion 14 is provided on the outside of the power receiving terminal 12 in a wall shape. The insulating portion 13 and the insulating portion 14 function as a guide ring when the power receiving connector 10 and the power feeding connector 20 are coupled.

  The conducting wire 15 and the conducting wire 16 are conductors whose surfaces are covered with an insulator. One end of the conducting wire 15 is electrically connected to the power receiving terminal 11 and the other end is electrically connected to the load. One end of the conducting wire 16 is electrically connected to the power receiving terminal 12, and the other end is electrically connected to the load.

  FIG. 2 is a perspective view showing the external appearance of the power supply connector 20. FIG. 4 is a plan view of the power supply connector 20 on the terminal mounting side (terminal surface). FIG. 10 is a plan view of the back side of the terminal surface of the power supply connector 20. FIG. 12 is a side view of the power supply connector 20.

  The outer shape of the power supply connector 20 is also substantially disk-shaped, and a magnet 21, magnets 22a to 22h, an insulating portion 23, an insulating portion 24, a conductive wire 25, a conductive wire 26, power supply terminals 27a to 27h, and power supply terminals 28a to 28h are provided on the terminal surface side. Have.

  The magnet 21 is disposed substantially at the center of the circular power supply connector 20. The magnet 21 is attracted to the power receiving terminal 11 when the power receiving connector 10 and the power feeding connector 20 are coupled. The magnets 22a to 22h are spaced apart from each other on a circular ring spaced a predetermined radius from the center of the circle. The magnets 22 a to 22 h are attracted to the power receiving terminal 12 when the power receiving connector 10 and the power feeding connector 20 are coupled. In the present embodiment, an example in which one magnet 21 and seven magnets 22a to 22h are arranged is shown, but the present invention is not limited to this, and an arbitrary number of magnets are arranged. You can do it. By increasing or decreasing the number of magnets, the adsorption strength can be easily adjusted.

  The insulation part 23 and the insulation part 24 are insulators, such as resin. The insulating portion 23 is provided in a wall shape between power supply terminals 27a to 27h, which will be described later, and power supply terminals 28a to 28h. The insulating portion 24 is provided in a wall shape outside the power supply terminals 28a to 28h. The insulating portion 23 and the insulating portion 24 function as a guide ring when the power receiving connector 10 and the power feeding connector 20 are coupled.

  The conducting wire 25 and the conducting wire 26 are conductors whose surfaces are covered with an insulator. One end of the conducting wire 25 is electrically connected to the power supply terminals 27a to 27h, and the other end is electrically connected to the power source. One end of the conductive wire 26 is electrically connected to the power supply terminals 28a to 28h, and the other end is electrically connected to the power source.

  The power feeding terminals 27a to 27h are switches for electrically connecting the power receiving connector 10 and the power feeding connector 20 when they are coupled. The power supply terminals 27a to 27h are arranged apart from each other on a circular ring having a predetermined radius r1 from the center of the circular shape. For example, the power supply terminals 27a to 27h include leaf springs made of a conductor such as a metal plate. The leaf spring is installed on a base of a conductor such as a circular or ring-shaped metal plate via an insulating base. The conductor base is electrically connected to the conductor 25. When the power receiving connector 10 and the power feeding connector 20 are coupled, the leaf springs included in the power feeding terminals 27a to 27h are deformed to short-circuit the base and the opposing power receiving terminal 11.

  The power supply terminals 28a to 28h have the same configuration as the power supply terminals 27a to 27h. The power feeding terminals 28a to 28h are switches for electrically connecting the power receiving connector 10 and the power feeding connector 20 when they are coupled. The power supply terminals 28a to 28h are spaced apart from each other on a ring with a predetermined radius r2 from the center of the circle (r1 <r2). For example, the power supply terminals 28a to 28h include leaf springs made of a conductor such as a metal plate. The leaf spring is installed on a base of a conductor such as a ring-shaped metal plate via an insulating base. The conductor base is electrically connected to the conductor 26. When the power receiving connector 10 and the power feeding connector 20 are coupled, the leaf springs included in the power feeding terminals 28a to 28h are deformed, and the base and the power receiving terminal 12 facing each other are short-circuited.

  The power supply terminals 27a to 27h and the power supply terminals 28a to 28h have different polarities. For example, the power supply terminals 27a to 27h provided near the center are positive poles, and the power supply terminals 28a to 28h provided outside the power supply terminals 27a to 27h are negative poles. In other words, the circular power supply connector 20 has a plurality of electrodes (power supply terminals 27a to 27h and power supply terminals 28a to 28h) whose polarities change according to the distance from the center of the circle.

  When the power feeding terminals 27 a to 27 h and the power receiving terminal 11 and the power feeding terminals 28 a to 28 h and the power receiving terminal 12 are short-circuited, the power source and the load are electrically connected, and power is fed from the power feeding device 2 to the power receiving device 1.

  5 and 6 are cross-sectional views showing a state when the power receiving connector 10 and the power feeding connector 20 are connected. The cross section of the power receiving connector 10 is taken along the cutting line a-a 'in FIG. The cross section of the power supply connector 20 is taken along the cutting line b-b 'in FIG.

  The insulating portion 13 of the power receiving connector 10 is slightly smaller in diameter than the insulating portion 23 of the power supply connector 20, and the insulating portion 13 is fitted inside the insulating portion 23. The insulating portion 14 of the power receiving connector 10 has a slightly larger diameter than the insulating portion 24 of the power supply connector 20, and the insulating portion 24 fits inside the insulating portion 14. As described above, the insulating portion 13 and the insulating portion 23, and the insulating portion 14 and the insulating portion 24 function as a guide ring that is fitted when the power receiving connector 10 and the power feeding connector 20 are connected. Thereby, it becomes possible to connect easily and reliably. Moreover, even if an external force in the direction perpendicular to the insertion axis is applied to the power receiving connector 10 or the power feeding connector 20 after connection, it is possible to suppress the disconnection or the short circuit between the plus and minus poles.

  When the terminal surfaces of the power receiving connector 10 and the power feeding connector 20 are brought close to each other according to the guide ring, the power receiving terminal 12 and the magnets 22a to 22h are attracted by magnetic force. Similarly, the power receiving terminal 11 and the magnet 21 are attracted by a magnetic force. Thereby, the power receiving connector 10 and the power feeding connector 20 are coupled.

  As shown in FIG. 5, the leaf springs of the power supply terminals 28a to 28h are supported by the base of the insulator without being in contact with other conductors before being coupled. As shown in FIG. 6, when the power receiving connector 10 and the power feeding connector 20 are coupled, the head portions of the leaf springs of the power feeding terminals 28 a to 28 h are in contact with the power receiving terminal 11. At this time, the leaf spring is pressed by the power receiving terminal 11 to be deformed, and a part of the leaf spring comes into contact with the base of the conductor (the bottom surface of the power supply connector 20 and the base of the insulator of the power supply terminals 28a to 28h). To do. Thereby, the positive electrode terminals of the power receiving connector 10 and the power feeding connector 20 are electrically connected to each other.

  Similarly, although not depicted in FIGS. 5 and 6, when the power receiving connector 10 and the power feeding connector 20 are coupled, the heads of the leaf springs of the power feeding terminals 27 a to 27 h come into contact with the power receiving terminal 12. At this time, the leaf spring is pressed by the power receiving terminal 12 to be deformed, and a part of the leaf spring comes into contact with the base of the conductor (the bottom surface of the power supply connector 20 and the base of the insulator of the power supply terminals 27a to 27h). To do. Thereby, the negative pole terminals of the power receiving connector 10 and the power feeding connector 20 are electrically connected to each other.

  When both the positive and negative poles are connected in this way, power supply from the power source connected to the power feeding device 2 to the load connected to the power receiving device 1 is started.

  FIG. 7 is a cross-sectional view of the power receiving connector 10 taken along the section line a-a ′ of FIG. 3. The heights of the insulating portion 14 and the insulating portion 13 are higher than the power receiving terminals 12 and 11 by d1. Thereby, even when a metal product etc. contact a terminal surface, it can suppress that the power receiving terminal 12 and the power receiving terminal 11 are short-circuited, and safety improves.

  FIG. 8 is a cross-sectional view of the power feeding connector 20 taken along the cutting line b-b ′ in FIG. 4. The height of the insulating part 24 and the insulating part 23 is higher by d2 than the magnet 21 and the magnets 22a to 22h. Thereby, even when a metal product etc. contact a terminal surface, unintentional adsorption | suction etc. can be suppressed. The heights of the insulating portion 24 and the insulating portion 23 are higher by d3 than the power supply terminals 27a to 27h and the power supply terminals 28a to 28h. As a result, even when a metal product or the like comes into contact with the terminal surface, it is possible to prevent the power supply terminals 27a to 27h and the power supply terminals 28a to 28h from being short-circuited, thereby improving safety.

  The power feeding system 100 according to the present embodiment is applicable to, for example, an in-vehicle charging system for a mobile terminal device. The power feeding device 2 is an in-vehicle holder / charger for a portable terminal device that is fixed in a vehicle and connected to a power source. The power receiving device 1 is a portable terminal device equipped with a charging case. In the power receiving device 1, the power receiving connector 10 is provided on the back surface of the charging case, and the conducting wire 15 and the conducting wire 16 are connected to the charging terminal of the portable terminal device. The power feeding device 2 is provided with a power feeding connector 20 at a position facing the back surface of the mobile terminal device. When the user brings the power receiving connector 10 provided on the back surface of the mobile terminal device close to the power supply connector 20, the mobile terminal device is attracted to the in-vehicle holder / charger by the magnetic force and fixed by the magnetic force and the guide ring. In the in-vehicle environment, external force due to acceleration / deceleration or vibration is applied to the power supply system 100. However, since the power supply system 100 is robust against these external forces, power is stably supplied to the mobile terminal device.

  According to the present embodiment, each of the power receiving connector 10 and the power feeding connector 20 has a plurality of terminals arranged in a circular shape or a ring shape having different polarities depending on the distance from the center. Thereby, even if it is a case where a rotation around the insertion axis is applied between the power receiving connector 10 and the power feeding connector 20, the positive poles of the power receiving connector 10 and the power feeding connector 20, and between the negative poles Since the contact is maintained, power can be supplied stably. Even if a moment about an axis perpendicular to the insertion axis is applied between the power receiving connector 10 and the power feeding connector 20 and the contact state is lost at some terminals, at least a part of the positive terminal As long as a part of the negative terminal is kept in contact, the power supply does not stop. Further, unlike the technique described in Patent Document 1, it is not necessary to change the polarity of the terminal according to the rotation, so that a diode and a polarity determination circuit are unnecessary, and the cost can be suppressed.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the terminal disposed near the center of the circle is the positive pole and the terminal disposed annularly on the outer side is the negative pole on both the power feeding and power receiving sides, but the polarity may be reversed. .

  In the above-described embodiment, the two-layer structure of the terminal arranged at the center of the circle and the terminal arranged annularly on the outer side is adopted on both the power feeding and power receiving sides, but the number of layers is increased. Also good. For example, a terminal arranged at the center of the circle (first layer), a terminal arranged annularly on the outer side (second layer), a terminal arranged annularly on the outer side (third layer), and an outer ring arranged on the outer side The terminals may be arranged in concentric circles of n layers such as terminals arranged in (4th layer). In this case, the polarity of the terminal can be changed according to the distance from the center of the circle. That is, if the first layer is a positive pole, the second layer can be configured to have different polarities such that the second layer is a negative pole, the third layer is a positive pole, and the fourth layer is a negative pole.

  In addition, it is not always necessary to place a terminal at the center of the circle on both the power feeding and power receiving sides. For example, a power supply and power receiving terminal having one polarity in a ring-shaped region separated from the center of the circle by a distance ra from the center of the circle. Power feeding and receiving terminals with other polarities may be arranged in ring-shaped regions separated by a distance rb (ra ≠ rb). In particular, as the terminal is arranged at a position farther from the center of the circle, robustness against external force such as vibration can be improved.

  In addition, the power supply terminal group does not necessarily have to be arranged on the circular ring at a predetermined interval, but in a region corresponding to a ring-type power receiving terminal having a certain width (having an inner diameter and an outer diameter), that is, As long as the power receiving terminal is disposed at a position where it can come into contact with the power receiving terminal, the arrangement may be arbitrary.

  Moreover, in the above-described embodiment, the example in which the magnets and the power supply terminals are alternately arranged on the ring in the power supply connector 20 has been shown, but the present invention is not limited to this, and the magnet may be an arbitrary magnet. It may be placed in a position. For example, one magnet may be arranged for every m power supply terminals. Alternatively, the power supply terminal and the magnet may be arranged side by side in the radial direction from the center of the circle. Or it is good also as arranging a magnet only in a specific layer.

  In the above-described embodiment, the configuration in which the power supply connector 20 has a magnet is shown. However, the present invention is not limited to this. For example, the power receiving device 1 side has a magnet, and the power supply connector 20 side has a gap. You may comprise so that the metal plate etc. which can be adsorb | sucked to a magnet are provided.

  Further, the numbers of power supply terminals, magnets, and guide rings exemplified in the above-described embodiment are merely examples, and may be changed to arbitrary numbers. In particular, robustness against external forces such as vibration can be increased by increasing the number of magnets and power supply terminals.

  Further, the switch structures of the power supply terminals 27a to 27h and the power supply terminals 28a to 28h disclosed in the above-described embodiment are merely examples, and an electrical connection is established when the power receiving connector 10 and the power supply connector 20 are combined. As long as it is a thing, any form may be adopted.

DESCRIPTION OF SYMBOLS 100 Power feeding system 1 Power receiving apparatus 10 Power receiving connector 11 Power receiving terminal 12 Power receiving terminal 13 Insulating part 14 Insulating part 15 Conductor 16 Conductor 2 Power feeding apparatus 20 Power feeding connector 21 Magnet 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h Magnet 23 Insulating part 24 Insulating part 25 Conductor 26 Conductor 27a, 27b, 27c, 27d, 27e, 27f, 27g, 27h Feed terminal 28a, 28b, 28c, 28d, 28e, 28f, 28g, 28h Feed terminal

Claims (5)

A power feeding system including a power feeding connector for supplying power and a power receiving connector for receiving power supply,
The power supply connector is
A first power supply terminal including a plurality of terminals arranged in a circular or ring-shaped region;
A second power supply terminal including a plurality of terminals arranged in a ring-shaped region outside the first power supply terminal,
The power receiving connector is
A circular or ring-shaped first power receiving terminal;
A ring-shaped second power receiving terminal disposed outside the first power feeding terminal,
The first power supply terminal and the first power reception terminal have a first polarity, and the second power supply terminal and the second power reception terminal have a second polarity different from the first polarity. A power supply system characterized by that. The power feeding system according to claim 1, wherein the power feeding connector and the power receiving connector are coupled by magnetic force. The power feeding connector and the power receiving connector are each a guide ring for coupling the first power feeding terminal and the first power receiving terminal and for coupling the second power feeding terminal and the second power receiving terminal. The power feeding system according to claim 1, further comprising: A power supply connector for supplying power,
A first power supply terminal including a plurality of terminals arranged in a circular or ring-shaped region;
A second power supply terminal including a plurality of terminals arranged in a ring-shaped region outside the first power supply terminal,
The power supply connector, wherein the first power supply terminal has a first polarity, and the second power supply terminal has a second polarity different from the first polarity. A power receiving connector for receiving power supply,
A circular or ring-shaped first power receiving terminal;
A ring-shaped second power receiving terminal disposed outside the first power feeding terminal,
The power receiving connector, wherein the first power receiving terminal has a first polarity, and the second power receiving terminal has a second polarity different from the first polarity.

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