JP2533053Y2 - Charging terminal structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention electrically connects a contact terminal for charging a storage battery incorporated in an electronic device such as a cordless telephone to a charging terminal of a charger for charging the storage battery of the electronic device. More specifically, regarding the charging terminal structure, it can be well adapted to the miniaturization and weight reduction of electronic devices, and always has a good electrical connection without causing contact failure due to terminal contamination and rattling of the electronic devices. The present invention relates to a charging terminal structure capable of ensuring a connection state.

[0002]

2. Description of the Related Art A conventional charging terminal structure for electrically connecting a charging contact terminal of an electronic device such as a handset of a cordless telephone with a charging terminal of a charger for charging the electronic device is shown in FIG. Such a structure is generally adopted.

That is, in the figure, reference numeral 20 denotes an electronic device such as a cordless telephone, and a circular fitting recess 21 is formed in the center of the circular bottom surface of the electronic device 20. A charging first contact terminal 22 made of a small metal plate is disposed at the center of the wall, and a projection projecting from the upper wall in the recess 21 with a biasing force at a predetermined distance from the first contact terminal 22. A second contact terminal 23 is provided. The first and second contact terminals 2
One of the two has a positive polarity and the other has a negative polarity.

[0004] In the drawing, reference numeral 24 denotes a rectangular trapezoidal charger for charging the electronic device 20, and an electronic device fitting recess 25 having a diameter slightly larger than the bottom of the electronic device 20 is provided on the upper surface of the charger 24. The electronic device fitting recess 25 is formed at the center of the electronic device fitting recess 25.
A circular fitting projection 26 having a slightly smaller diameter is formed.

At the center of the upper surface of the fitting projection 26, there is provided a projection-like first charging terminal 27 projecting with an urging force, and a ring-like shape surrounding the first charging terminal 27. A second charging terminal 28 made of a metal plate is provided. Note that the radius of the second charging terminal 28 is the same as the distance between the first contact terminal 22 and the second contact terminal 23 of the electronic device 20, and the first charging terminal 2
7 is located at the center of the second charging terminal 28.

Here, the second contact terminal 23 and the first charging terminal 27 project from the insertion holes formed in the fitting concave portion 21 and the fitting convex portion 26 in a state of being urged by a spring or the like. It can be buried in the fitting concave portion 21 or the fitting convex portion 26 by being pressed from the front end side.

When the electronic device 20 is charged by the charger 24, the electronic device 20 is set up on the charger 24.
The bottom of the electronic device 20 is connected to the electronic device fitting recess 2 of the charger 24.
5 is fitted.

As a result, the fitting concave portion 21 formed on the bottom surface of the electronic device 20 and the fitting convex portion 26 of the charger 24 are fitted, and the first contact terminal 22 and the first charging terminal 27 and the second contact terminal The terminal 23 and the second charging terminal 28 are in contact with each other, and the second contact terminal 23 and the first charging terminal 27 are respectively pressed and buried by the weight of the electronic device 20. At this time, the second contact terminal 23 and the first charging terminal 27
, The first contact terminal 22 and the first charging terminal 27 and the second contact terminal 23 and the second charging terminal 28 abut against each other at a constant pressure and are electrically connected. And
Power is supplied from the charger 24 to the electronic device 20 through the first charging terminal 27, the first contact terminal 22, the second contact terminal 23, and the second charging terminal 28, and the storage battery built in the electronic device 20 is charged. Is done.

[0009]

However, in the above-mentioned charging terminal structure, the first charging terminal 27 and the second contact terminal 23 are pressed by the weight of the electronic device 20 and buried respectively, and the first resilient force is exerted by the return repulsive force thereof. One contact terminal 22 and first charging terminal 27 and second contact terminal 23 and second charging terminal 2
Since the electronic device 20 is configured to maintain an electrical connection state with the electronic device 20, there is a case where a good electrical connection cannot be maintained with such a structure at present when the size and weight of the electronic device 20 are progressing. .

In addition, since the direction of gravity is the same as the direction of contact between the terminals, the terminal is susceptible to lateral shaking due to an earthquake or the like, and is liable to rattle. May cause problems. For example, if the charging terminal structure described above is adopted in a cordless telephone set in which a telephone call can be put into a talking state just by lifting the telephone set from the state where the telephone set is placed on the charger, the telephone (electronic device) 20 may rattle when receiving a call. When this occurs, the contact terminals 22 and 23 of the telephone 20 and the charging terminals 27 and 28 of the charger 24 momentarily move away from each other and then return again, and there is a possibility that the call may be disconnected.

Further, each of the terminals 2 has
There is also a risk of poor contact due to the formation of an insulating layer due to the adhesion of dirt and the like to 2, 23, 27 and 28.

The present invention has been made in view of the above circumstances, and does not hinder the miniaturization and weight reduction of electronic devices, and also minimizes the occurrence of contact failures due to rattling and terminal contamination. Further, it is an object of the present invention to provide a charging terminal structure capable of reliably maintaining an electrical connection between terminals.

[0013]

In order to achieve the above object, a charging terminal structure according to the present invention electrically connects a charging contact terminal of an electronic device to a charging terminal of a charger for charging the electronic device. In the charging terminal structure, a fitting recess is formed on the bottom surface of the electronic device, and an inner circumferential side of the fitting recess is formed.
Respectively disposed a first contact terminal and the second contact terminal spaced from each other on the surface, whereas, as to protrude the engaging protrusions to be fitted into the fitting in the recess in the electrical equipment fitting portion of the charger A first charging terminal and a second charging terminal having a protruding shape are arranged on the outer peripheral side surface of the fitting convex portion while being separated from each other and urged outward, respectively. By fitting the fitting projection of the charger, the first contact terminal and the second contact terminal are brought into contact with the first charging terminal and the second charging terminal, respectively, and are electrically connected. It is configured as follows.

Preferably, in the charging terminal structure, the fitting concave portion and the fitting convex portion are each formed in a circular shape,
Thereby arranged spaced a predetermined distance each other in the vertical direction of the first contact terminal ring-shaped and the second contact terminal on the inner peripheral side along the circumferential direction of the circular fitting recess, the outer periphery of the circular convex portion
The first charging terminal and the second charging terminal having a protruding shape on the side surface are vertically spaced apart from each other by a predetermined distance, and are arranged so as to be biased outward.

[0015]

According to the charging terminal structure having the above-described structure, the fitting concave portion of the electronic device and the fitting convex portion of the charger are fitted to each other to be disposed on the inner peripheral surface of the fitting concave portion of the electronic device. The first and second contact terminals and the first and second protrusion-shaped first and second charging terminals disposed in a state of being urged outward on the outer peripheral surface of the fitting projection of the charger, respectively. The charging terminals are pressed against each other by the urging force of the charging terminals, and are electrically connected to each other.

In this case, the first and second charging terminals are pressed by the inner peripheral surface of the fitting concave portion of the electronic device in the direction of the center of the fitting convex portion, that is, in the horizontal direction, and the repulsive force causes electrical connection between the terminals. Connected well. Therefore, small and small electronic devices
Lightening does not affect the electrical connectivity between the terminals,
The electronic device can be reduced in size and weight while ensuring good electrical connectivity.

Further, since the direction of gravity is different from the direction of contact between the terminals, the terminal is resistant to lateral shake due to an earthquake or the like, and poor contact due to rattling is unlikely to occur. For this reason, the present invention can be suitably applied to a cordless telephone set in which a telephone call can be established simply by lifting the telephone set from the state where the telephone set is placed on the charger.

Moreover, when the fitting concave portion of the electronic device and the fitting convex portion of the charger are fitted to connect each terminal, the first and second charging terminals of the charger are connected to the fitting concave portion of the electronic device. And slides while pressing the inner peripheral surface of the fitting concave portion, reaches the first and second contact terminals, and is connected between the terminals.
For this reason, the insulating layer made of dirt and the like attached to each terminal is scraped off when the electronic device and the charger are fitted, and the occurrence of poor contact due to such an insulating layer is reliably prevented.

Further, each of the fitting concave portion and the fitting convex portion is formed in a circular shape, and the ring-shaped first contact terminal and the second contact terminal are vertically arranged on the inner peripheral surface of the circular fitting concave portion along the circumferential direction. The first charging terminal and the second charging terminal having a protruding shape on the outer peripheral surface of the circular fitting convex portion are urged outward with a predetermined distance therebetween in the vertical direction. Since the fitting concave portion and the fitting convex portion are formed in a circular shape by adopting the configuration in which the electronic device is oriented in any direction, the fitting concave portion of the electronic device and the charger Of the electronic device can be easily fitted to the charger. Moreover, in this case, since the first and second contact terminals are formed in a ring shape on the inner peripheral surface of the fitting concave portion, good electrical connection can be obtained regardless of the direction of the electronic device. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a charging terminal structure according to an embodiment of the present invention. A telephone (electronic device) 1 of a cordless telephone, and a rectangular trapezoidal charger 5 for charging the telephone 1 are shown in FIGS. Are electrically connected to each other.

A circular fitting recess 2 is formed at the center of the circular bottom surface of the telephone 1. On the upper and lower inner peripheral surfaces of the fitting concave portion 2, a first contact terminal 3 and a second contact terminal 4 each having a circular ring shape and made of a metal plate are vertically spaced apart from each other along the circumferential direction. The storage battery built in the telephone 1 is charged through the contact terminals 3 and 4. In addition,
One of the contact terminals 3 and 4 is an anode, and the other is a cathode.

On the other hand, on the upper surface of the charger 5, a telephone fitting recess 9 slightly larger in diameter than the bottom of the telephone 1 is formed. A circular fitting convex portion 6 having a diameter slightly smaller than the fitting concave portion 2 formed on the bottom surface of the telephone 1 is formed.

As shown in FIG. 2, the through-holes 1 are formed at upper and lower portions of the outer peripheral surface of the fitting projection 6 so as to face each other.
1, 11 are formed, and these through holes 11, 1 are formed.
The bent corners of the first charging terminal 7 and the second charging terminal 8 in which one end of the long metal plate is bent in a rectangular shape from 1 protrude. The base ends of the first and second charging terminals 7 and 8 are fixed to the printed circuit board 10 in the charger 5, and the bent corners protruding from the fitting protrusions 6 are formed of a metal elastic plate having a spring elasticity. It is biased outward by The distance from the bottom of the telephone fitting recess 9 between the protruding bent corner of the first charging terminal 7 and the protruding bent corner of the second charging terminal is determined by the fitting of the first contact terminal 3 and the second contact terminal 4. Each distance is the same as the distance from the lower end of the concave portion 2.

When the telephone 1 is charged by the charger 5, the bottom of the telephone 1 is fitted into the telephone fitting recess 9 of the charger 5 so that the telephone 1 stands on the charger 5. Thereby, the fitting concave portion 2 of the telephone 1 and the fitting convex portion 6 of the charger 5 are fitted.

At this time, the protruding bent corners of the first and second charging terminals 7 and 8 are pressed inward by the inner peripheral surface of the fitting recess 2 of the telephone 1, so that the first and second charging terminals 7 and 8 are partially inserted into the through holes 11 and 11. In this state, the inner peripheral surface of the fitting concave portion 2 slides while pressing the inner peripheral surface of the fitting concave portion 2 by the repulsive force to contact the first and second contact terminals 3 and 4 respectively. Stop in the state (see FIG. 2).

As a result, the first contact terminal 3 and the first charging terminal 7 and the second contact terminal 4 and the second charging terminal 8 abut against each other, and the first and second charging terminals 7 and 8 use the spring elasticity. The terminals are electrically connected at a constant pressure by the repulsive force. Then, power is supplied from the charger 5 to the telephone 1 via the first charging terminal 7, the first contact terminal 3, the second contact terminal 8, and the second charging terminal 4, and a storage battery built in the telephone 1 is provided. Is charged.

As described above, according to the charging terminal structure of the present embodiment, the first and second charging terminals 7 and 8 are formed in the radial direction of the fitting projection 6 by the inner peripheral surface of the fitting recess 2 of the telephone 1. That is, the terminals are pressed in the horizontal direction, and the terminals are electrically connected favorably by the repulsive force. Therefore, the reduction in size and weight of the telephone 1 does not affect the electrical connectivity between the terminals, and the size and weight of the telephone 1 can be reduced while ensuring good electrical connectivity.

Further, since the direction of gravity is different from the direction of contact between the terminals, the terminal is resistant to lateral shake due to an earthquake or the like, and poor contact due to rattling is unlikely to occur. For this reason, even if the cordless telephone is set in a call state just by lifting the telephone 1 from the state where the telephone 1 is placed on the charger 5, the telephone 1 may play back when the call is received. Absent.

Moreover, the fitting recess 2 of the telephone 1 and the charger 5
The first and second charging terminals 7 and 8 of the charger 5 abut against the inner peripheral surface of the fitting recess 2 of the telephone 1 when the terminals are connected by fitting the fitting protrusions 6 of the telephone 1 to each other. Since the inner peripheral surface of the fitting recess 2 is pressed and slid while arriving at the first and second contact terminals 3 and 4 to be connected thereto, an insulating layer made of dirt or the like attached to each terminal is formed. When the telephone 1 is operated, a self-cleaning action of removing an insulating layer made of dirt or the like works every time the telephone 1 is operated. This reliably prevents the occurrence of poor contact due to the insulating layer such as dirt.

Furthermore, in the charging terminal structure of the present embodiment, the fitting concave portion 2 and the fitting convex portion 6 are each formed in a circular shape, so that the telephone 1 can be oriented in any direction. The fitting concave portion 2 and the fitting convex portion 6 of the charger 5 can be fitted, and the setting of the telephone 1 on the charger 5 is very easy. In addition, since the first and second contact terminals 3 and 4 are formed in a ring shape along the circumferential direction on the inner peripheral surface of the circular fitting concave portion 2, no matter which direction the telephone 1 faces. A good electrical connection can be obtained.

The structure of the charging terminal according to the present invention is not limited to the above embodiment, and may be variously changed within the scope of the present invention. For example, the telephone fitting recess 9
Is not always essential and can be omitted as appropriate. In addition, the shapes of the fitting concave portion 2 and the fitting convex portion 9 and the shapes of the first and second contact terminals are not limited to a circle or a ring shape, but may be various shapes. Further, the configurations of the first and second charging terminals, the urging mechanism, and the like can be variously changed.

[0032]

As described above, according to the charging terminal structure of the present invention, the reduction in size and weight of the electronic device does not affect the electrical connectivity between the terminals, and provides good electrical connectivity. It is possible to reduce the size and weight of the electronic device while securing it.

Further, since the direction of gravity is different from the direction of contact between the terminals, the terminal is resistant to lateral shake due to an earthquake or the like, and poor contact due to rattling is unlikely to occur. For this reason, the present invention can be suitably applied to a cordless telephone set in which a telephone call can be established simply by lifting the telephone set from the state where the telephone set is placed on the charger.

Further, the insulating layer made of dirt or the like attached to each terminal is scraped off by the rubbing of the charging terminal and the contact terminal when the electronic device and the charger are fitted, and each time the electronic device is attached to or detached from the charger. Since the self-cleaning action of removing the insulating layer made of dirt or the like works, the occurrence of poor contact due to the insulating layer made of dirt or the like is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a charging terminal structure according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state of the charging terminal structure during charging.

FIG. 3 is a perspective view showing a conventional charging terminal structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone (electronic device) 2 Fitting recess 3 First contact terminal 4 Second contact terminal 5 Charger 6 Fitting convexity 7 First charging terminal 8 Second charging terminal 9 Telephone fitting recess 10 Printed circuit board 11 Penetration Hole

Claims (2)

(57) [Scope of request for utility model registration] In a charging terminal structure for electrically connecting a charging contact terminal of an electronic device and a charging terminal of a charger for charging the electronic device, a fitting concave portion is formed on a bottom surface of the electronic device, The first contact terminal and the second contact terminal are arranged on the inner peripheral side surface of the fitting concave portion so as to be separated from each other,
On the other hand, a fitting convex portion that fits into the fitting concave portion is protruded from an electric device fitting portion of the charger, and an outer periphery of the fitting convex portion is provided.
The first charging terminal and the second charging terminal having a protruding shape on the side surface are arranged in a state of being separated from each other and urged outward, respectively, and the fitting concave portion of the electronic device and the fitting convex portion of the charger are provided. By fitting, the first contact terminal and the second contact terminal and the first charging terminal and the second charging terminal respectively abut against each other, characterized in that it is configured to be electrically connected. Charging terminal structure. 2. A fitting concave portion and a fitting convex portion are each formed in a circular shape, and a ring-shaped first contact terminal and a second contact terminal are vertically arranged on the inner peripheral side surface of the circular fitting concave portion along the circumferential direction. The first charging terminal and the second charging terminal projecting from the outer peripheral side surface of the circular fitting convex portion are vertically spaced apart from each other by a predetermined distance in the direction and are urged outward. The charging terminal structure according to claim 1, wherein the charging terminal structure is disposed in a state where the charging terminal is disposed.