JP2007179802A - Ac adaptor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an AC adaptor capable of achieving cost reduction and improvement of productivity, easy to store and handle, and preferable in terms of economy and resources. <P>SOLUTION: When a commercial AC power is received from a commercial AC power supply outlet, the AC adaptor main body 4 to convert received AC into a DC electric power adapted to an equipment and a DC cord 5 to supply a convert DC electric power to the equipment are connected detachably and exchangeably through a connector 6 for connection, moreover the connector 6 for connection has a structure with slip off prevention part, moreover the slip off prevention part has a screw connection structure, furthermore the connector 6 for connection is constituted of a jack connector 12 for connection installed on the converted DC electric power output side of the AC adaptor main body 4 and a plug connector 13 for connection installed on a power receiving side end of the DC cord 5, and an self-reset type fuse is built in the plug connector 13 for connection. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an AC adapter for connecting an electric device and an electronic device (in the text, simply referred to as a device) operating with DC power to a commercial AC power outlet.

  As shown in FIG. 7, this type of AC adapter known in the past includes an AC side plug connector 10 for arbitrarily connecting to a commercial AC power outlet and receiving commercial AC power, and the received AC to the device. 4 parts of AC adapter main body for converting to suitable DC power, 5 parts of DC cord for supplying the converted DC power to the device, and connecting the tip of the DC code 5 unit to the DC power receiving jack connector of the device The DC-side plug connector 15 has an integral structure that cannot be separated.

  However, when the DC cord portion is fixedly connected to the AC adapter main body portion, there are the following problems.

-The manufacturer must manufacture and provide a DC power receiving jack connector for each device to which the DC side plug connector is connected.
-When the DC plug connector is different for each device model, the manufacturer must manufacture an AC adapter that is compatible with the DC plug connector, and there is a limit to reducing the economic burden and resource burden.
・ Manufacturers needed to secure a wide space for inventory management as well as difficulty in inventory management due to the increased number of AC adapter types due to the different DC plug connectors on each model. .
-Manufacturers had to connect and integrate the AC adapter main unit and DC cord in a state that is compatible with the device model, leading to an increase in manufacturing costs and a decrease in productivity.
-For manufacturers and users, the AC adapter itself and the DC cord are integrated, so the DC cord has become an obstacle to carrying and storing.
・ If either the AC adapter main unit or the DC cord becomes defective or unusable, the manufacturer and user must dispose of the whole or both if it cannot be repaired. It was not preferable.
・ Users and users are not only inconvenient to transfer to other devices, but also troublesome to organize and store different devices.

  The present invention has been devised as a measure for solving the above-mentioned problems. An AC adapter that can reduce costs and improve productivity, can be easily stored and handled, and is economical and resource-friendly. The purpose is to provide.

  In order to achieve the above object, an AC adapter according to the present invention includes an AC adapter main body that converts received AC to DC power suitable for equipment when receiving commercial AC power from a commercial AC power outlet, and the conversion DC. The DC cord that supplies power to the device is connected detachably and replaceably via a connector for connection, and the connector for connection has a structure with a detachment prevention portion, and also prevents the detachment. The part has a screw connection structure.

  Further, the connection connector includes a connection jack connector provided on the converted DC power output side of the AC adapter body and a connection plug connector provided on the power receiving side end of the DC cord. The connector has a self-resetting fuse.

  In the present invention, as described above, since the DC cord portion is detachably connected to the AC adapter main body via the connection connector, the AC adapter main body and the DC cord are integrated with each other. The AC adapter main body can be mass-produced on a single production line with a unified standard. Therefore, cost reduction and productivity improvement can be achieved. In addition, since it can be stored separately in one type of AC adapter main body and various types of DC cords adapted to suit various devices, it is not only easy to manage, but in particular the AC adapter Since the stock quantity of the main body can be reduced, the storage space can be reduced. Furthermore, since the AC adapter main body can be moved freely without the cord and the DC cord can be moved without the AC adapter main body, the handling is facilitated, and the efficiency of management work and shipping work can be improved.

  In addition, since the AC adapter according to the present invention has a configuration in which the AC adapter main body and the DC cord are separated as described above, the shipping operation is performed by selecting a DC cord that is suitable for the device to be shipped. It can be shipped in a state where it is connected to the AC adapter main body or in a bundled state where it is not connected.

  Further, if the user has only one AC adapter main body, the user can connect and use different types of DC cords as needed. Therefore, the inconvenience that cannot be diverted can be eliminated. Furthermore, since it is possible to support various devices by connecting a compatible cord to the AC adapter body, leave the DC cord connected to the compatible device and connect it to the AC adapter body arbitrarily. However, since it can be used, it is convenient for the user. In this way, the DC cord can be left connected to a compatible device, so that the problem of cord entanglement can be solved all at once. In addition, when either the AC adapter main body or the DC cord is damaged and becomes unusable, it can be dealt with by repairing or replacing it, which is more economical and preferable for resource saving. .

  Furthermore, since the AC connector according to the present invention has a structure with a disconnection prevention portion such as a screw connection structure or the like, there is a possibility that the DC cord will come loose during use and cause a disconnection accident. It is safe and can be used with confidence. Further, since the disconnection preventing portion has a screw connection structure, it is extremely convenient for continuously supplying DC power to the device.

  Furthermore, since the above connector has a built-in self-resetting fuse, an abnormality has occurred on either the power supply side or the device side, and a current higher than normal has flowed between the power supply and the device. In this case or when it continues to flow, the self-resetting fuse prevents this, so that it is possible to reliably avoid a situation in which the side where no abnormality has occurred is damaged. Further, since the self-resetting fuse does not need to be replaced every time unlike a general-purpose fuse, there is no trouble in use, and it is not difficult to use the AC adapter main body and the DC cord.

  1 to 4 show a first embodiment of an AC adapter according to the present invention. 1 is an external perspective view showing the whole, FIG. 2 is a partially cutaway plan view showing a separated state, FIG. 3 is a schematic view showing a connection state, and FIG. 4 is showing a connected state. It is sectional drawing of the principal part.

  The AC adapter 1 of the first embodiment includes an AC adapter main body 4 that converts received AC to DC power suitable for a DC device 3 when receiving commercial AC power from a commercial AC power outlet 2, and the converted DC power. Is connected to the DC cord 5 through the connector 6 so as to be detachable and replaceable.

  The AC adapter body 4 has an AC / DC converter 8 built into a small case 7, and lead wires 9 a and 9 b are connected to the primary side of the AC / DC converter 8 from the commercial AC power outlet 2 on one end wall of the case 7. An AC plug connector 10 that receives AC power is fixed to the other end wall of the case 7, and converted DC power converted to DC power suitable for the DC device 3 by the AC / DC converter 8 is lead to the other end wall of the case 7. A connection jack connector 12 that flows to the DC cord 5 via the wires 11a and 11b is fixed. The AC / DC converter 8 has a fuse (not shown).

  The DC cord 5 is connected at its base end to a connection plug connector 13 configured to be able to be fitted to and disconnected from the connection jack connector 12. 14 is connected to a DC plug connector 15 that can be fitted and detached.

  That is, the attachment / detachment of the AC adapter main body 4 and the DC cord 5 is achieved by the connection jack connector 12 and the connection plug connector 13 functioning as the connection connector 6.

  Next, the structure of the connection jack connector 12 and the connection plug connector 13 that perform the above attachment / detachment function will be described.

  The connecting jack connector 12 is mainly composed of a resin cylindrical body 17 in which a plug hole 16 into which a distal end portion of a plug main body 23 of the connecting plug connector 13 to be described in detail is inserted is formed. A center pin 18 functioning as a center conductor is erected in 17. Further, an elastic metal terminal piece 19 that is elastically brought into contact with the outer conductor 21 of the connecting plug connector 13 described in detail below is fixed inside the cylindrical body 17.

  The connecting jack connector 12 is used in a state where the cylindrical body 17 is fixed to the case 7, one of the lead wires 11 a and 11 b is connected to the center pin 18, and the other is connected to the terminal piece 19.

  The connecting plug connector 13 is formed by plugging a metal cylindrical outer conductor 21 outside a resin cylindrical insulating wall 20 and inserting a metal cylindrical inner conductor 22 into the insulating wall 20 to thereby form a plug main body portion. 23, and a short rod-like tip member 24 formed integrally with the insulating wall 20 is provided at the proximal end of the plug body 23.

  The connection plug connector 13 is used in a state where one of the conductive wires 25 a and 25 b embedded in the DC cord 5 is connected to the outer conductor 21 and the other is connected to the inner conductor 22.

  FIG. 5 is a cross-sectional view of a main part showing the second embodiment in a connected state.

  The AC adapter 26 of the second embodiment is different from that of the first embodiment in that a self-resetting fuse 27 described below is provided and the connection plug connector 13 is screwed to the case 7. Therefore, the same parts are denoted by the same reference numerals, and detailed description of these parts is omitted.

  That is, the self-recoverable fuse 27 generates an abnormality when an abnormality occurs on either the power supply side or the device side and a current exceeding the normal value flows or continues to flow between the power supply and the device. It is embedded in the tip member 24 in a state of fulfilling the function of protecting the other side.

  Further, the connecting plug connector 13 is provided with female and male screws 28a and 28b on the case 7 and the tip member 24 so as not to be loosened.

  FIG. 6 is a cross-sectional view of a main part showing the third embodiment in a connected state.

  The AC adapter 29 of the third embodiment includes the connection jack connector 12 described above provided on the DC cord 5 side, the connection plug connector 13 provided on the case 7, and a female / male screw 28a, 28b is different from the AC adapter 26 of the second embodiment in that the connection jack connector 12 and the connection plug connector 13 are provided. The detailed explanation is omitted.

  That is, the connecting jack connector 12 is provided with a circular concave portion 30 on the distal end surface of the distal end member 24, and the cylindrical conductive member 31 is fitted and fixed on the inner peripheral wall surface of the circular concave portion 30. A center pin 32 functioning as a conductor is erected at the center of the bottom of the conductive member 31, and the conductive wires 25 a and 25 b are connected to the conductive member 31 and the center pin 32.

  The plug connector 13 for connection has a plug body portion 23 configured in the same manner as described above, and the plug body portion 23 is fixed to the case 7 via a resin cylindrical mounting body 33, and the outer conductor in the plug body portion 23 is 21 and the inner conductor 22 are connected to the lead wires 11a and 11b.

  The female / male screws 28 a and 28 b are provided on the inner surface of the opening of the conductive member 31 and the outer periphery of the base end of the outer conductor 21 of the plug main body 23.

  According to the present invention, the structure for preventing detachment by screwing the female / male screws 28a, 28b is provided with, for example, a protrusion on the connection plug connector 13 side, and the protrusion on the connection jack connector 12 side when the connection plug connector 13 is advanced or retracted. The locking mechanism may be provided with a recessed groove portion for guiding the protrusion and an engagement groove portion with which the protrusion is engaged by rotating after insertion.

  As described above, in each of the above embodiments, the DC cord 5 is detachably connected to the adapter body 4 by the connection connector 6, and the connection connector 6 is connected to the connection jack connector 12. Unlike the conventional example of the DC cord integrated type, the adapter main body 4 can be efficiently manufactured on one manufacturing line. Therefore, cost reduction and productivity improvement can be achieved. Also, by removing the DC cord 5, carrying and storage are convenient. Furthermore, the DC cord 5 is a type that can be attached and detached, but when it is connected to the adapter body 4, it does not come off due to unexpected external force. It has a protection function. Further, since the screw connection portion and the lock mechanism can be made compact so as not to protrude outward, there is no possibility that the connection connector 6 becomes large. Further, the shipment form can be either a state where the DC cord 5 is attached or a state where it is removed.

  The present invention can be implemented by an AC adapter of a type in which an AC side plug connector is connected to the data adapter body 4 via an AC cord. In this case, it is desirable that the AC cord be detachable and replaceable.

It is an external appearance perspective view which shows the whole 1st Embodiment. It is a partially cutaway top view similarly shown in a separated state. It is a schematic diagram which similarly shows the mode of a connection. It is sectional drawing of the principal part similarly shown in the state of a connection. It is sectional drawing of the principal part which shows 2nd Embodiment in the state of a connection. It is sectional drawing of the principal part which shows 3rd Embodiment in the state of a connection. It is a partially cutaway top view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AC adapter of 1st Embodiment 2 Commercial AC power outlet 3 DC equipment 4 AC adapter main body 5 DC cord 6 Connector for connection 7 Case 8 AC / DC converter 9a, 9b Lead wire 10 AC side plug connector 11a, 11b Lead wire 12 Jack connector for connection 13 Plug connector for connection 14 Equipment side jack connector 15 DC side plug connector 16 Plug hole 17 Cylindrical body 18 Central pin 19 Terminal piece 20 Insulating wall 21 Outer conductor 22 Inner conductor 23 Plug body portion 24 Tip members 25a, 25b Conductor 26 AC adapter 27 of the second embodiment Self-resetting fuses 28a, 28b Female / male screw 29 AC adapter 30 of the third embodiment Circular recess 31 Conductive member 32 Center pin 33 Attachment

Claims (3)

An AC adapter main body that converts the received AC to DC power suitable for the device when receiving AC power from a commercial AC power outlet, and a DC cord that supplies the converted DC power to the device are connected via a connector for connection. An AC adapter characterized by being detachably connected. 2. The AC adapter according to claim 1, wherein the connector for connection has a structure with a detachment preventing portion such as a screw connection structure. The connection connector includes a connection jack connector provided on the converted DC power output side of the AC adapter body and a connection plug connector provided on the power receiving side end of the DC cord. 3. The AC adapter according to claim 1, wherein a self-resetting fuse is incorporated.

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