JPS63224208A - Power transfer device - Google Patents

Abstract

PURPOSE:To contrive improvement in power transfer characteristics by a method wherein a power supply part and a power receiving part are positioned in close vicinity or they are contacted with each other, and a closed magnetic circuit in which the first and the second cores penetrate the primary and the secondary windings is formed. CONSTITUTION:An inserting part 8 is constituted on one of the opposing terminals 2a and 6a of the first core 2 and the second core 6, and in order to constitute its receiving part 9 on the other opposing terminal, the inserting part 8 is inserted into the receiving part 9 when a closed magnetic circuit is formed by the first core 2 and the second core 6, as the opposing surfaces of the first core 2 and the second core 6 on the inserting part 8 and the receiving part 9 are widened three dimensionally, their opposing area can be enlarged. Accordingly, the opposing area can be made larger without specially constituting the opposing terminals 2a and 6a of the first core 2 and the second core 6 larger than the other parts of the first core 2 and the second core 6. Even when a gap is generated between the first core 2 and the second core 6, the magnetic reluctance generated by the gap can be made small sufficiently, and the magnetic reluctance as the entire closed magnetic circuit can also be made small. As a result, the characteristics of power transfer can be improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a power transmission device, in particular, a power supply side and a load IJ, which can be mechanically separated and removed very easily. It is possible to improve the appearance,
Moreover, the present invention relates to a power transmission device that can improve power transmission characteristics despite having a simple and economical core configuration.

[Conventional technology]

Conventionally, power was supplied to various electric and electronic devices such as portable rechargeable electronic devices such as electric beard trimmers and electric water heaters by plugging the device's AC plug into a power outlet or using an AC adapter. This was done by inserting a DC plug provided on the AC adapter into an input terminal provided on the device.

However, it is extremely troublesome to have to insert a plug each time the device is used.

In addition, for example, in the case of an electric water heater, when the user lifts the water heater and pours the hot water inside, the power cord is also lifted along with the plug, causing inconveniences such as the power cord getting in the way.

Furthermore, the device has the disadvantage that it is unsightly because the plug protrudes and a hole for inserting the plug is required.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned prior art, and it is possible to mechanically separate the power supply side and the load side very easily without providing a plug or the like on the load side, and it is possible to mechanically separate the power supply side and the load side, and it is possible to easily separate the power supply side and the load side. It is an object of the present invention to provide a power transmission device that does not require any trouble when supplying power to an electric/electronic device and also improves the appearance of the electric/electronic device. A further object of the present invention is to provide a power transfer device that has a simple and economical core configuration and can improve power transfer characteristics.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a power supply section including a core having a primary winding around which an AC voltage is input, and a secondary winding connected to a first load. A second core wound with a wire is provided, and a power receiving part is separated from the power supply part and integrally provided to the load of the blade 1, and the power supply part and the power receiving part are provided. The core of the spear 1 and the second core form a closed magnetic path passing through the primary winding and the secondary winding when the two are brought into close proximity or in contact with each other. Further, one of the opposing ends of the core and the second core of the spear 1 is configured with an insertion part, and the other is configured with a receiving part.

[For production]

According to the present invention, when the power supply section and the power reception section are brought close to each other or in contact with each other, the core and the second core of the spear 1 form a closed magnetic path passing through the primary winding and the secondary winding. These have the same function as a transformer.

Therefore, the power supplied to the primary winding is transmitted to the secondary winding and supplied to the load.

As described above, according to the present invention, power can be transmitted to the target load simply by bringing the power supply section and the power receiving section integrated with the first load close to each other or in contact with each other. When using the various electrical and electronic devices that serve as the load of the spear 1, there is no need to worry about plugging in the plugs one by one as in the past, which is extremely convenient.

Further, since there is no need to provide a plug or a plug insertion hole for the electric/electronic equipment that is the load of the fangs 1, the appearance is also improved.

In principle, the end surfaces of the opposing ends of the core of the spear 1 and the second core are configured to be simple planes, and when the power supply section and the power receiving section are brought close to each other or in contact with each other, the core and the second core of the spear 1 are Second
It is also conceivable that the end surfaces of the opposing ends of the cores be configured to be close to or in contact with each other. However, in this case, when trying to improve the power transmission characteristics, the shapes of the core of the fang 1 and the second core are inconvenient in manufacturing, and there is also a disadvantage that materials are wasted and uneconomical. There is.

That is, in order to improve the power transmission characteristics, it is necessary to reduce the magnetic resistance of the entire closed magnetic path formed by the core of the spear and the second core, but the magnetic resistance of the entire closed magnetic path formed by the core of the spear If the end surfaces (planes) of the ends are configured to be close to each other, a gap exists between them, and the above-mentioned contradiction 1.
Even when the end surfaces (flat surfaces) of the opposing ends of the core and the second core are configured to be in contact with each other, it is difficult to make the end surfaces of the opposing ends of the core and the second core completely flat. Therefore, even if these are brought into contact with each other, there will be a very small gap between them. Therefore, in order to reduce the magnetic resistance of the entire closed magnetic path, the magnetic resistance due to each gap must be made sufficiently small. First, for this purpose, it is necessary to increase the area of the end faces of the core of the spear 1 and the opposing ends of the second core. Therefore, in the above case, when trying to improve the power transfer characteristics, the opposite ends of the +1 core and the second core are configured to be larger than the other parts of the +1 core and the second core. , the area of the core of the spear 1 and the end face of the opposing end of the spear field must be increased, and J
' The shapes of the first core and the second core are inconvenient in manufacturing, and there is also a disadvantage that materials are wasted and uneconomical.

In this respect, in the present invention, one of the opposing ends of the core and the second core of the spear 1 is configured with an insertion portion, and the other is configured with a receiving portion thereof.

When the core of j.1 and the second core form a closed magnetic path, the insertion part is inserted into the receiving part, and the insertion part and the receiving part connect the core of spear 1 and the second core. Since the facing surfaces are expanded three-dimensionally, the facing area is expanded. Therefore, according to the present invention, the core of the fang 1 and the opposite ends of the second core are not configured to be particularly larger than the other parts of the core and the second core of the spear 1. The opposing area with the core of spear 1 can be increased, and even if a gap occurs between the core of spear 1 and the second core, the magnetic resistance due to the gap will be sufficiently small, and the magnetic resistance of the entire closed magnetic circuit will be reduced. Since this decreases, the power transfer characteristics improve. As described above, according to the present invention, although the characteristics of power transmission are improved, it is not necessary to specially configure the opposing ends of the core of the fang 1 and the second core, and the present invention simply uses the above-mentioned method. Since it is only necessary to construct the insertion part and the receiving part, the core of the spear 1 and the second core do not have shapes that are inconvenient for manufacturing, so the construction is simple, and there is less waste of material, which is economical. .

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

In Figures 1 and 2, (α) is the power supply section, (h
) is a power receiving unit, and (C) is a load of various electrical and electronic devices. Note that FIG. 1 is a configuration diagram showing a state where the power supply section (α), power reception section (b), and load (C) are separated, and FIG. 2 is a configuration diagram showing the power transmission state.

In the present invention, the power supply section (α) has the primary winding i! to which AC voltage is input! 21 cores (2) wrapped with (1)
The configuration is equipped with the following.

In the case of the embodiments shown in Fig. 1.1 and Fig. 2, the power supply section (α) is provided with an AC power supply circuit (3) that outputs an AC voltage, and the primary winding (1) is connected to its output terminal. ) are connected. Note that various alternating current voltages can be input to the primary winding (1), but only 30 KHz to 100-KHz
It is desirable to input a high frequency voltage of approximately This is because advantages such as being able to reduce the number of turns of the winding wire can be obtained. In addition.

In the figure (4) is a coil bobbin.

Moreover, the power receiving part (b) is configured to include a second core (6) around which a secondary winding (5) connected to the load (C) is wound, and the power receiving part (b) is connected to the power supply part (α). is separated and the above load (C
). Note that (7) in the figure is a coil bobbin.

In the present invention, when the power supply section (cL) and the power reception section (b) are brought close to each other or in contact with each other, the core (2) and the second core (6) of the fang 1 are connected to the primary winding. It is configured to form a closed magnetic path passing through the wire (1) and the secondary winding (5), and the opposite ends (2a) and (6a) of the core (2) and the second core (6) of the spear 1 are connected to each other. One of them constitutes the insertion part (8), and the other constitutes the receiving part (9).In the case of the embodiments shown in Figures 1 and 2, the second core (6) is the core (6) of the spear 1.
The end (6a) opposite to the power receiving unit (S) is arranged so as to protrude from the outer surface of the casing of the power receiving unit (S), and the opposite end (6a)
6α) The entire portion is an insertion portion (8). And the spear
The core (2) is arranged such that the end (2α) opposite to the second core (6) is just exposed on the outer surface of the casing of the power supply unit (α), and the opposite end (2α) ) is provided with a hole that serves as a receiving portion (9) for the insertion portion (8). Therefore, in the case of the embodiments in Figs. 1 and 2, the load (C)
By placing the power receiving part (b) integrally provided on the power supply part (α), as shown in the second figure, the insertion part (
8) is inserted into the receptacle (9), and the tx core (2)
The second core (6) forms a closed magnetic path passing through the primary winding (1) and the secondary winding (5).

In addition, in the case of the embodiments in Figures 1 and 2.

As shown in the second figure, the insertion part (8) is inserted into the receiving part (9).
When inserted into the holder, they do not come into contact with each other and a gap is created between them, but they may also come into contact with each other and just fit. However, if the structure is configured so that a gap is created in advance as in the embodiments shown in Figs. 3□1 and 12, the receiving portion (9)
There is an advantage that even if dust or the like enters the inside, it has almost no effect on the power transmission characteristics.

In addition, contrary to the illustrations in M□ 1 and 2, the above insertion part (8
) may be provided at the opposite end (2α) of the first core (2), and the receiving portion (9) may be provided at the opposite end (6α) of the second core (6). For example, 1-1
In the figure and Fig. 2, the core (2) of spear l and the second core (
6) can be replaced completely. Further, the shapes of the insertion portion (8) and the receiving portion (9) are not particularly limited.

In addition, in the case of the embodiments shown in Figure 1 and Figure 2, the core of the spear (2)
) and the second core (6) are approximately U-shaped, but when the power supply part (α) and the power reception part (A) are brought close to each other or in contact with each other, the core ( 2) and the second core (6) may form a closed magnetic path passing through the primary winding (1) and the secondary winding (5), and may have other shapes, such as an E-shape. (·.moreover.

It is desirable that the core (2) and the second core (6) of the above-mentioned components be constructed using ferrite cores in order to reduce eddy current loss.

According to the present invention having the above configuration, by bringing the power supply section (a) and the power reception section (b) close to each other or in contact with each other, the core (2) and the second core (6) of the spear 1 can be connected to the primary winding. Since a closed magnetic path passing through the wire (1) and the secondary winding (5) is formed, these act in the same way as a transformer.

Therefore, the power supplied to the primary winding (1) is transmitted to the secondary winding (5) and supplied to the load (C). Note that the load (C) is provided with a rectifier circuit if necessary.

As described above, according to the present invention, power can be transmitted to the load (C) simply by bringing the power supply unit (al) and the power reception unit (b) integrally provided to the load (C) close to each other or in contact with each other. Therefore, it is extremely convenient to use various electrical and electronic devices as loads (C) without the hassle of plugging them in as required in the past.

In addition, there is no need to provide a plug insertion hole for the electrical/electronic equipment that is the load (C).

It also improves the appearance.

Further, according to the present invention, the insertion portion (8) is formed at one of the opposing ends (2α) and (6a) of the core (2) and the second core (6) of the spear 1, and the insertion portion (8) is formed at the other end. Acceptance section (9
), so when the core (2) of spear 1 and the second core (6) form a closed magnetic path, the insertion part (8)
will be inserted into the receiving part (9), and the insertion part (
8) The core (2) and the second
Since the surface facing the core (6) expands three-dimensionally, the facing area increases. Therefore, according to the present invention, the opposite ends (2α) and (6α) of the first core (2) and the second core (6) are connected to each other. It is possible to make the facing area of the core (2) of the spear 1 and the second core (6) more narrow than the other parts of the spear, without configuring the core (2) of the spear 1 and the second core (6) more closely. Even if there is a gap between the two cores (Core 2), the magnetic resistance due to the gap becomes sufficiently small, and the magnetic resistance of the closed magnetic path as a whole becomes small, resulting in improved power transmission characteristics. Even though the power transfer characteristics are improved in this way, the first core (2) and the second core (
There is no need to specially configure the opposing ends (2α) and (6α) of the insertion portion (8) and the receiving portion (9).
), the shape of the core (2) of the fang 1 and the second core (6) does not become inconvenient in manufacturing, and the construction is simple, and there is less waste of material, making it economical. It is.

Figures 3 and 4 respectively show other embodiments of the present invention, and the same components as in the embodiments shown in Figures 1 and 12 are given the same reference numerals.

The difference between the embodiment shown in Fig. 3 and the embodiments shown in Figs. 1 and 2 is that the protruding length of the opposing end (6α) of the second core (6) is slightly longer. be. Therefore, according to this embodiment, when the power receiving section 1b) provided integrally with the load (C) is placed on the power supply section (α),
There is a slight gap between the casing of the power supply section (α) and the casing of the power reception section (h), so even if there are minute irregularities on the surface of the casing, the insertion section (8) and It is designed to ensure reliable contact with the receiving part (9). However, the insertion site (
As mentioned above, it is not necessary that the receiving part (9) and the receiving part (9) are in contact with each other.

In addition, the difference between the embodiment shown in Fig. 4 and the embodiment shown in Figs. The shape of the receiving portion (9) has been changed accordingly. In addition, as mentioned above, the insertion part (8) and the receiving part (9)
) can be changed in various ways.

〔Effect of the invention〕

According to the present invention, it is possible to mechanically separate the power supply side and the load side very easily without providing a plug or the like on the load side, which saves time and effort when supplying power to various electrical and electronic devices as loads. This makes it easier to use the electric/electronic equipment.

In addition to improving the appearance of the electric/electronic equipment, the core structure is simple and economical, and the power transmission characteristics can be improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Figure 1 is a configuration diagram showing a separated state, Figure 2 Liu is a configuration diagram showing its power transmission state, and Figure 3 is a configuration diagram showing another embodiment. Figures 4 and 4 are configuration diagrams showing still other embodiments. (1)...Primary winding, (2)...Core of spear 1, (5
)...Secondary winding, (6)...Second core, (5α)
(6α)... Opposite end, (8)... Insertion part, (9)...
...Acceptance section, (α)...Power supply section, (b)...
Power receiving section, (C)...Load/

Claims (1)

[Claims] A power supply unit includes a first core wound with a primary winding to which an AC voltage is input, and a second core wound with a secondary winding connected to a load. It consists of a power receiving part that is separated from the supply part and is integrally provided with the load, and when the power supply part and the power receiving part are brought close to each other or in contact with each other, the first core and the second core are connected to each other. In the power transmission device forming a closed magnetic path passing through the primary winding and the secondary winding, one of the opposing ends of the first core and the second core is configured with an insertion portion, and the other is configured with an insertion portion. A power transmission device comprising: