JP7701072B2 - Electronic device and method for preventing incorrect connection of power adapter - Google Patents

Description

The present invention relates to an electronic device configured to supply power to the electronic device body from a power conversion adapter, and a method for preventing erroneous connection of the power conversion adapter.

An electronic device that is configured to receive power from a power conversion adapter is designed to perform as specified when power is being supplied from the power conversion adapter to the electronic device. For example, the electronic device and the power conversion adapter are configured to cooperate with each other to have a noise filter function in order to prevent noise generated by the electronic device from being conducted to the commercial power supply, and to prevent noise generated by other electronic devices connected to the commercial power supply from being conducted to the electronic device itself. In addition, in the unlikely event that an overcurrent flows due to a malfunction of the electronic device, the power conversion adapter is configured to have an overcurrent protection circuit that stops power supply when a current exceeding the normal current consumption of the electronic device flows, in order to prevent damage from spreading.

In addition, the noise components generated by the electronic device itself differ depending on the use of the electronic device, and the current consumption of the electronic device itself also differs depending on the use of the electronic device, so the performance of the electronic device itself is guaranteed when it is combined with the included power conversion adapter. For this reason, electronic devices are usually specified in their instruction manuals to connect the specified power conversion adapter that comes with the electronic device to the electronic device itself.

However, in Japan, the power plug of the power conversion adapter and the power jack of the electronic device are often specified by the general standard RC-5320A of JEITA (Japan Electronics and Information Technology Association), and so there have been cases where the power plug of a power conversion adapter other than the included power conversion adapter has been connected to the power jack of the electronic device itself and used. If a power conversion adapter other than the one included is connected to the electronic device and used, the electronic device itself or peripheral devices may malfunction and not perform as expected, and in the event of an abnormality, the protection function may not work properly, causing major damage.

There is a technique for preventing power adapters other than the one provided from being connected to the electronic device body and used. For example, Patent Document 1 discloses a method for preventing erroneous connection of an adapter, which monitors the input voltage and noise level from the adapter, determines whether the input voltage and noise level are within their respective reference values, and cuts off the power supply from the adapter if they are not within the reference values. Patent Document 2 discloses a method for preventing erroneous connection of an adapter, which receives, from a terminal, identification information corresponding to an adapter that supplies power to the device, determines whether the received identification information corresponds to a predetermined identification information, and cuts off the power supply from the adapter to the device if it is determined not to correspond to the predetermined identification information.

JP 2010-181331 A JP 2015-210570 A

The following analysis is provided by the present inventors.

The methods for preventing adapter misconnections in Patent Documents 1 and 2 require the addition of complex electronic circuits within the device to monitor input voltages and noise levels, receive identification information, and determine whether the adapter is misconnected.

The main objective of the present invention is to provide an electronic device that can help prevent erroneous connection of a power adapter to the electronic device body without adding complex electronic circuits, and a method for preventing erroneous connection of a power adapter.

The electronic device according to the first aspect is an electronic device configured to supply power to an electronic device main body from an external power source via a power conversion adapter, the power conversion adapter comprising a power plug, a power cord electrically connected to the power plug, and an action part attached to the power cord, the electronic device main body comprising a power jack configured to be mechanically and electrically connected detachably to the power plug of the power conversion adapter, an electronic circuit, and a switch configured to electrically connect and disconnect the power jack and the electronic circuit, the action part configured to act on the switch when the power plug is connected to the power jack, and the switch configured to electrically connect the power jack and the electronic circuit when acted upon by the action part.

The second aspect of the invention relates to a method for preventing erroneous connection of a power conversion adapter in an electronic device configured to supply power from an external power source to an electronic device main body via a power conversion adapter, the power conversion adapter comprising a power plug, a power cord electrically connected to the power plug, and an action part attached to the power cord, the electronic device main body comprising a power jack configured to be detachably mechanically and electrically connected to the power plug of the power conversion adapter, an electronic circuit, and a switch configured to electrically connect and disconnect the power jack and the electronic circuit, the method for preventing erroneous connection includes the steps of connecting the power plug to the power jack, and causing the action part to act on the switch to electrically connect the power jack and the electronic circuit.

The first and second aspects can contribute to preventing incorrect connection of a power conversion adapter to an electronic device body without adding complex electronic circuits.

1 is a schematic diagram illustrating a configuration of an electronic device according to a first embodiment in a state where the electronic device main body and a power conversion adaptor are connected to each other; 1 is a schematic diagram illustrating a configuration of an electronic device according to a first embodiment in a state where an electronic device main body and a power conversion adaptor are separated from each other. 1 is a schematic diagram showing a configuration in which a power jack of an electronic device main body of the electronic device according to embodiment 1 and a power plug of a power conversion adapter are connected to each other. 11 is a schematic diagram showing a configuration of an electronic device according to a second embodiment in a state where the electronic device main body and a power conversion adaptor are connected to each other. FIG. 13 is a schematic diagram showing a configuration of an electronic device according to a third embodiment in a state where the electronic device main body and a power conversion adaptor are connected to each other. FIG. 13 is a schematic diagram showing a configuration of an electronic device according to a fourth embodiment in a state where the electronic device main body and a power conversion adaptor are connected to each other. FIG.

The following describes the embodiments with reference to the drawings. Note that when drawing reference symbols are used in this application, they are intended solely to aid understanding and are not intended to limit the invention to the illustrated form. In addition, the following embodiments are merely examples and do not limit the invention.

[Embodiment 1]
An electronic device according to the first embodiment will be described with reference to the drawings. Fig. 1 is a schematic diagram showing the configuration of the electronic device according to the first embodiment in a state where the electronic device main body and the power conversion adapter are connected. Fig. 2 is a schematic diagram showing the configuration of the electronic device according to the first embodiment in a state where the electronic device main body and the power conversion adapter are separated. Fig. 3 is a schematic diagram showing the configuration of the electronic device according to the first embodiment in a state where the power jack of the electronic device main body and the power plug of the power conversion adapter are connected.

The electronic device 1 is an electrical product configured to supply power to the electronic device main body 10 from an external power source (not shown; commercial power source, cigarette lighter power source, etc.) via a power conversion adapter 20 (see FIG. 1). The electronic device 1 may be, for example, a small electronic device such as a notebook personal computer, a game machine, a network device, a telephone, or a facsimile machine. The electronic device 1 comprises the electronic device main body 10 and the power conversion adapter 20.

The electronic device body 10 is the body of the electronic device 1 that has a power jack 11 as a power input section (see FIG. 1). The electronic device body 10 has the power jack 11, a switch 12, an electronic circuit 13, a housing 14, and a cord fixing section 15.

The power jack 11 is a connector that is mechanically and electrically connected to the power plug 21 of the power conversion adapter 20 in a detachable manner (see FIG. 1). The power jack 11 is housed (mounted) in the housing 14 so that the socket of the power jack 11 fits into the hole 14a of the housing 14. The power plug 21 of the power conversion adapter 20, which is inserted into the hole 14a of the housing 14, is inserted into the socket of the power jack 11. The power jack 11 is supplied with DC power (e.g., DC 12V) from the power conversion adapter 20. The power jack 11 is electrically connected to the electronic circuit 13 via the switch 12 within the electronic device main body 10.

The switch 12 is a device that electrically connects and disconnects (opens and closes) the power jack 11 and the electronic circuit 13 (see FIG. 1). The switch 12 electrically connects the power jack 11 and the electronic circuit 13 when it is acted upon by the acting portion 26. The switch 12 has a switch stem 12a that can be acted upon by the acting portion 26 of the power conversion adapter 20. The switch 12 is configured to be on when the switch stem 12a is pressed by the acting portion 26 and to be off when it is not pressed. A part (tip) of the switch stem 12a can be made to protrude to the outside through the hole portion 14a when the switch stem 12a is not pressed by the acting portion 26 (see FIG. 2 and FIG. 3).

The electronic circuit 13 is an electric circuit that includes electronic active elements corresponding to the functions of the electronic device main body 10 as its components (see FIG. 1). The electronic circuit 13 includes a DCDC converter 13a and a main circuit 13b.

The DCDC converter 13a is a component that converts the voltage from the switch 12 (e.g., DC 12V) into multiple types of voltage (or one type) and outputs it to the main circuit 13b (see FIG. 1). The DCDC converter 13a converts the power input from the power jack 11 into multiple types of voltage (or one type) to be used by the main circuit 13b. In the example of FIG. 1, the DCDC converter 13a converts to 1.0V, 3.3V, and 5.0V, but other voltages are also possible.

The main circuit 13b is an electronic circuit that forms the main part of the function of the electronic device main body 10 (see FIG. 1). The main circuit 13b is configured to receive multiple types of voltages from the DCDC converter 13a.

The housing 14 is a structure that houses (mounts) the power jack 11, electronic circuit 13, and switch 12 (see FIG. 1). The housing 14 has a hole 14a that leads to the socket of the power jack 11 from the outside. The housing 14 has a hole 14b that leads to the switch 12 from the outside. The housing 14 has a cord fixing part 15 that fixes the power cord 22 to prevent the power plug 21 of the power conversion adapter 20 from coming off the power jack 11.

The cord fixing part 15 is a part that detachably fixes the power cord 22 of the power conversion adapter 20 (see FIG. 1). The cord fixing part 15 is disposed outside the housing 14 near the hole in the housing 14. A pair of cord fixing parts 15 are disposed so as to straddle the hole 14b in the housing 14. The cord fixing part 15 may, for example, clamp and fix the power cord 22 of the power conversion adapter 20.

The power conversion adapter 20 is an accessory for the electronic device 1 that has a power plug 21 as a power output unit (see FIG. 1). For example, an AC-DC adapter or a DC-DC adapter can be used as the power conversion adapter 20 depending on the type of external power source. The power conversion adapter 20 has a power plug 21, a power cord 22, a power conversion unit 23, a power cable 24, an outlet plug 25, and an action unit 26.

The power plug 21 is a connection part (connector) that is mechanically and electrically connected detachably to the power jack 11 of the electronic device main body 10 (see FIG. 1). The power plug 21 is electrically connected to the power conversion part 23 via the power cord 22.

The power cord 22 is a cord that electrically connects the power plug 21 and the power conversion unit 23 (see Figure 1).

The power conversion unit 23 is a functional unit that converts an external power source (e.g., AC 100V) into a power source (e.g., DC 12V) used by the electronic device main body 10 (see FIG. 1). The power conversion unit 23 is electrically connected to the power plug 21 via the power cord 22. In the example of FIG. 1, the power conversion unit 23 is electrically connected to the outlet plug 25 via a power cable 24. The power conversion unit 23 may be configured integrally with the outlet plug without a power cable. In addition, the power conversion unit 23 may be electrically connected to another connection unit (e.g., a cigarette lighter socket) instead of the outlet plug 25 depending on the type of external power source.

The power cable 24 is a cable that electrically connects the power conversion unit 23 and the outlet plug 25 (see Figure 1).

The outlet plug 25 is a connector that electrically and mechanically connects to an external power outlet (not shown) (see FIG. 1). When the outlet plug 25 is connected to a commercial power outlet, the AC 100V flowing through the outlet is supplied to the power conversion unit 23 via the power cable 24.

The action part 26 is a structural part configured to act on the switch 12 when the power plug 21 is connected to the power jack 11 (see FIG. 1). The action part 26 is directly attached to the power cord 22. The action part 26 is attached to the power cord 22 near the power plug 21. The action part 26 is configured to act on the switch 12 when the power cord 22 is fixed to the cord fixing part 15. For example, a three-dimensional structure such as a spherical protrusion or a rectangular parallelepiped can be used as the action part 26. The action part 26 is configured to push in the switch stem 12a when the power cord 22 is fixed to the cord fixing part 15 so that the action part 26 is disposed between a pair of cord fixing parts 15.

Next, the operation of the electronic device according to the first embodiment will be described with reference to the drawings (FIGS. 1 to 3).

First, with the electronic device main body 10 and the power conversion adapter 20 separated as shown in Figure 2, connect the power plug 21 of the power conversion adapter 20 to the power jack 11 of the electronic device main body 10 as shown in Figure 3. At this time, the switch 12 in which the action part 26 of the power conversion adapter 20 is not in action is off, so even if the power plug 21 and the power jack 11 are connected, no power is supplied from the power conversion adapter 20 to the electronic circuit 13, and the main circuit 13b of the electronic circuit 13 does not operate.

Next, as shown in FIG. 1, the power cord 22 of the power conversion adapter 20 is fixed to the cord fixing portion 15 of the electronic device main body 10. In this state, the action portion 26 of the power conversion adapter 20 acts (depresses) the switch stem 12a of the switch 12 of the electronic device main body 10, turning the switch 12 on, supplying power (e.g., DC 12V) input to the power jack 11 to the electronic circuit 13, and the DCDC converter 13a of the electronic circuit 13 generates 1.0V, 3.3V, and 5.0V to be used by the main circuit 13b, allowing the main circuit 13b to operate.

According to the first embodiment, when the power plug 21 of the power conversion adapter 20 is connected to the power jack 11 of the electronic device main body 10 and the action part 26 of the power conversion adapter 20 acts on the switch 12 of the electronic device main body 10, the power conversion adapter 20 supplies power to the electronic circuit 13 of the electronic device main body 10, which contributes to preventing erroneous connection of the power conversion adapter to the electronic device main body 10 without adding a complex electronic circuit.

Furthermore, according to the first embodiment, even if the power plug of another power conversion adapter that does not have the action portion 26 is connected to the power jack 11 of the electronic device main body 10, power is not supplied to the electronic circuit 13 of the electronic device main body 10, so that malfunctions or failures do not occur in the electronic device 1 itself or other surrounding electronic devices due to incorrect connection, and harm or damage can be avoided.

Furthermore, according to the first embodiment, by preventing erroneous connection of the power conversion adapter to the electronic device main body 10, connection of the power conversion adapter 20 attached to the electronic device main body 10 to the electronic device main body 10 is prompted, and a state in which the electronic device 1 can exhibit the specified performance can be ensured.

Furthermore, according to the first embodiment, even if another power conversion adapter that does not have the action portion 26 is connected to the electronic device main body 10, power is not supplied from the other power conversion adapter to the electronic circuit 13 of the electronic device main body 10, so that interference due to noise, etc. can be avoided, user convenience is improved, and it can also contribute to reducing inquiries from users to the manufacturer of the electronic device 1.

[Embodiment 2]
An electronic device according to the second embodiment will be described with reference to the drawings. Fig. 4 is a schematic diagram showing the configuration of the electronic device according to the second embodiment in a state where the electronic device main body and the power conversion adaptor are connected.

The second embodiment is a modified example of the first embodiment. In the first embodiment (see FIG. 1), the power cord 22 of the power conversion adapter 20 is fixed to the cord fixing portion 15 of the electronic device main body 10, and the action portion 26 provided on the power cord 22 acts (presses) the switch stem 12a of the switch 12 to supply power. However, in the second embodiment, the cord fixing portion is eliminated, and the action portion 27 is arranged using an elastic material such as rubber or plastic that is flexible and has a large frictional force against the housing 14 and is difficult to come off, and the action portion 27 has a three-dimensional shape such as a cylinder or a rectangular parallelepiped. The action portion 27 is detachably attached to the hole portion 14c. The switch stem 12a is pushed in by the action portion when the action portion 27 is attached to the hole portion 14c. By connecting the power plug 21 of the power conversion adapter 20 to the power jack 11 of the electronic device main body 10 and inserting and fixing the action part 27 into the hole part 14c of the housing 14, the action part 27 acts (depresses) the switch stem 12a of the switch 12, turning on the switch 12 and supplying power from the power jack 11 to the electronic circuit 13. The other configurations of the second embodiment are the same as those of the first embodiment.

According to the second embodiment, as in the first embodiment, it is possible to contribute to preventing erroneous connection of the power conversion adapter to the electronic device main body 10 without adding complex electronic circuits, and it is possible to make the electronic device main body 10 have a simpler configuration in appearance than the first embodiment.

[Embodiment 3]
An electronic device according to embodiment 3 will be described with reference to the drawings. Fig. 5 is a schematic diagram showing the configuration of the electronic device according to embodiment 3 in a state where the electronic device main body and the power conversion adaptor are connected.

Embodiment 3 is a modification of embodiment 2, in which the action part 28 is attached to the power cord 22 via a strap 29 (e.g., a string, a tune, etc.) instead of directly attaching it to the power cord 22. The action part 28 is configured to be inserted into the hole 14d of the housing 14, and can be, for example, a plug-shaped structure. The action part 28 can also be provided with a stopper 28a configured to prevent it from falling out of the hole 14d. By connecting the power plug 21 of the power conversion adapter 20 to the power jack 11 of the electronic device main body 10 and inserting the action part 28 into the hole 14d of the housing 14, the action part 28 acts on (depresses) the switch stem 12a of the switch 12 of the electronic device main body 10, and power from the power jack 11 can be supplied to the electronic circuit 13.

According to the third embodiment, as in the second embodiment, it is possible to contribute to preventing erroneous connection of the power conversion adapter to the electronic device main body 10 without adding complex electronic circuits, and it is not necessary to precisely attach the action part 28 to the power cord 22.

[Embodiment 4]
An electronic device according to embodiment 4 will be described with reference to the drawings. Fig. 6 is a schematic diagram showing the configuration of the electronic device according to embodiment 4 in a state where the electronic device main body and the power conversion adaptor are connected.

The electronic device 1 is a device configured to supply power from an external power source to the electronic device main body 10 via the power conversion adapter 20. The electronic device 1 includes the power conversion adapter 20 and the electronic device main body 10.

The power conversion adapter 20 includes a power plug 21, a power cord 22 electrically connected to the power plug 21, and an action part 26 attached to the power cord 22.

The electronic device main body 10 includes a power jack 11 configured to be detachably mechanically and electrically connected to the power plug 21 of the power conversion adapter 20, an electronic circuit 13, and a switch 12 configured to electrically connect and disconnect the power jack 11 and the electronic circuit 13.

The action portion 26 is configured to act on the switch 12 when the power plug 21 is connected to the power jack 11. The switch 12 is configured to electrically connect the power jack 11 and the electronic circuit 13 when acted upon by the action portion 26.

According to the fourth embodiment, when the power plug 21 of the power conversion adapter 20 is connected to the power jack 11 of the electronic device main body 10 and the action part 26 of the power conversion adapter 20 acts on the switch 12 of the electronic device main body 10, the power conversion adapter 20 supplies power to the electronic circuit 13 of the electronic device main body 10, which contributes to preventing erroneous connection of the power conversion adapter to the electronic device main body 10 without adding a complex electronic circuit.

A part or all of the above embodiments may be described as follows, but is not limited to the following:

[Appendix 1]
An electronic device configured to supply power to a main body of the electronic device from an external power source via a power conversion adapter,
The power adapter is
A power plug and
a power cord electrically connected to the power plug;
An action part attached to the power cord;
Equipped with
The electronic device body includes:
a power jack configured to be detachably connected mechanically and electrically to the power plug of the power conversion adapter;
An electronic circuit;
a switch configured to electrically connect and disconnect the power jack and the electronic circuit;
Equipped with
the action portion is configured to act on the switch when the power plug is connected to the power jack,
The switch is configured to electrically connect between the power jack and the electronic circuit when the switch is acted upon by the action portion.
electronic equipment.
[Appendix 2]
The action part is directly attached to the power cord.
2. The electronic device of claim 1.
[Appendix 3]
The power conversion adapter includes a strap configured to attach the working portion to the power cord.
2. The electronic device of claim 1.
[Appendix 4]
the electronic device body includes a housing that houses the power jack, the electronic circuit, and the switch;
the housing has a hole through which the switch is connected from the outside,
The switch includes a switch stem that can be acted upon by the action part of the power conversion adaptor, and is configured to be turned on when the switch stem is pressed by the action part and turned off when the switch stem is not pressed.
4. The electronic device according to claim 2 or 3.
[Appendix 5]
A part of the switch stem protrudes to the outside through the hole when the switch stem is not pressed.
5. The electronic device according to claim 4.
[Appendix 6]
the electronic device body includes a cord fixing portion disposed outside the housing near the hole and configured to detachably fix the power cord of the power conversion adaptor;
The action portion is configured to push the switch stem when the power cord is fixed to the cord fixing portion.
6. The electronic device according to claim 4 or 5.
[Appendix 7]
The cord fixing portion is provided as a pair so as to straddle the hole portion,
The action portion is configured to push in the switch stem when the power cord is fixed to the cord fixing portion such that the action portion is disposed between the pair of cord fixing portions.
7. The electronic device according to claim 6.
[Appendix 8]
The action portion is configured to be detachably attached to the hole portion,
The switch stem is configured to be pushed in by the action portion when the action portion is attached to the hole portion.
5. The electronic device according to claim 4.
[Appendix 9]
The action portion includes a stopper configured to prevent the action portion from falling out of the hole portion.
9. The electronic device according to claim 8.
[Appendix 10]
The electronic circuit includes:
A main circuit configured to receive a plurality of types of voltages;
a converter that converts a voltage from the switch into the plurality of types of voltages and outputs the voltages to the main circuit;
Equipped with
10. An electronic device according to any one of claims 1 to 9.
[Appendix 11]
1. A method for preventing erroneous connection of a power conversion adaptor in an electronic device configured to supply power to a main body of the electronic device from an external power source via the power conversion adaptor, comprising:
The power adapter is
A power plug and
a power cord electrically connected to the power plug;
An action part attached to the power cord;
Equipped with
The electronic device body includes:
a power jack configured to be detachably connected mechanically and electrically to the power plug of the power conversion adapter;
An electronic circuit;
a switch configured to electrically connect and disconnect the power jack and the electronic circuit;
Equipped with
The method for preventing erroneous connection includes the steps of:
connecting the power plug to the power jack;
causing the action portion to act on the switch to electrically connect between the power jack and the electronic circuit;
A method for preventing incorrect connection.

The disclosures of the above patent documents are incorporated herein by reference and may be used as the basis or part of the present invention as necessary. Within the framework of the entire disclosure of the present invention (including the claims and drawings), and further based on the basic technical ideas, modifications and adjustments of the embodiments and examples are possible. Furthermore, within the framework of the entire disclosure of the present invention, various combinations or selections (or non-selection as necessary) of various disclosed elements (including each element of each claim, each element of each embodiment or example, each element of each drawing, etc.) are possible. In other words, the present invention naturally includes various modifications and corrections that a person skilled in the art would be able to make in accordance with the entire disclosure, including the claims and drawings, and the technical ideas. Furthermore, with regard to the numerical values and numerical ranges described in this application, any intermediate value, lower numerical value, and small range are considered to be described even if not specified. Furthermore, the disclosures of the above cited documents may be used in part or in whole in combination with the descriptions in this document as part of the disclosure of the present invention as necessary, in accordance with the spirit of the present invention, and are considered to be included (belong) to the disclosures of this application.

REFERENCE SIGNS LIST 1 Electronic device 10 Electronic device body 11 Power jack 12 Switch 12a Switch stem 13 Electronic circuit 13a DCDC converter 13b Main circuit 14 Housing 14a, 14b, 14c, 14d Hole 15 Cord fixing part 20 Power conversion adapter 21 Power plug 22 Power cord 23 Power conversion part 24 Power cable 25 Outlet plug 26, 27, 28 Action part 28a Stopper 29 Strap

Claims (9)

An electronic device configured to supply power to a main body of the electronic device from an external power source via a power conversion adapter,
The power adapter is
A power plug and
a power cord electrically connected to the power plug;
An action part attached to the power cord;
a strap configured to attach the working portion to the power cord;
Equipped with
The electronic device body includes:
a power jack configured to be detachably connected mechanically and electrically to the power plug of the power conversion adapter;
An electronic circuit;
a switch configured to electrically connect and disconnect the power jack and the electronic circuit;
Equipped with
the action portion is configured to act on the switch when the power plug is connected to the power jack,
The switch is configured to electrically connect between the power jack and the electronic circuit when the switch is acted upon by the action portion.
electronic equipment. The action part is directly attached to the power cord.
2. The electronic device according to claim 1. the electronic device body includes a housing that houses the power jack, the electronic circuit, and the switch;
the housing has a hole through which the switch is connected from the outside,
The switch includes a switch stem that can be acted upon by the action part of the power conversion adaptor, and is configured to be turned on when the switch stem is pressed by the action part and turned off when the switch stem is not pressed.
3. The electronic device according to claim 2 . the electronic device body includes a cord fixing portion disposed outside the housing near the hole and configured to detachably fix the power cord of the power conversion adaptor;
The action portion is configured to push the switch stem when the power cord is fixed to the cord fixing portion.
4. The electronic device according to claim 3 . The cord fixing portion is provided as a pair so as to straddle the hole portion,
The action portion is configured to push in the switch stem when the power cord is fixed to the cord fixing portion such that the action portion is disposed between the pair of cord fixing portions.
5. The electronic device according to claim 4 . The action portion is configured to be detachably attached to the hole portion,
The switch stem is configured to be pushed in by the action portion when the action portion is attached to the hole portion.
4. The electronic device according to claim 3 . The action portion includes a stopper configured to prevent the action portion from falling out of the hole portion.
7. The electronic device according to claim 6 . The electronic circuit includes:
A main circuit configured to receive a plurality of types of voltages;
a converter that converts a voltage from the switch into the plurality of types of voltages and outputs the voltages to the main circuit;
Equipped with
3. The electronic device according to claim 1 or 2 . 1. A method for preventing erroneous connection of a power conversion adaptor in an electronic device configured to supply power to a main body of the electronic device from an external power source via the power conversion adaptor, comprising:
The power adapter is
A power plug and
a power cord electrically connected to the power plug;
An action part attached to the power cord;
a strap configured to attach the working portion to the power cord;
Equipped with
The electronic device body includes:
a power jack configured to be detachably connected mechanically and electrically to the power plug of the power conversion adapter;
An electronic circuit;
a switch configured to electrically connect and disconnect the power jack and the electronic circuit;
Equipped with
The method for preventing erroneous connection includes the steps of:
connecting the power plug to the power jack;
causing the action portion to act on the switch to electrically connect between the power jack and the electronic circuit;
A method for preventing incorrect connection.

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