JP2008301553A - Noncontact charger, and noncontact charging system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noncontact charging system which enables noncontact charging of an apparatus to be charged of any kind of shape by guiding the apparatus easily to an exact mounting position. <P>SOLUTION: The mounting portion 11 of a cradle 1 is formed in a substantially planar shape having an area sufficient for mounting an apparatus to be charged such as a portable telephone 2 with margin. Consequently, apparatuses in various shapes can be mounted on the mounting portion 11. At a position on the mounting portion 11 corresponding to a primary transmission coil 3, a mirror face portion 15 including a tolerance mark 16 corresponding to the center of the primary transmission coil 3 is provided, and a central position mark 20 is provided at a position corresponding to the center of the secondary transmission coil 6 of the portable telephone 2. The portable telephone 2 is mounted on the mounting portion 11 while reflecting the central position mark 20 of the portable telephone 2 on the tolerance mark 16 of the mounting portion 11. Consequently, the portable telephone 2 can be mounted easily at an exact position on the mounting portion 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention performs non-contact charging on charged devices such as a mobile phone, a PHS phone (PHS: Personal Handyphone System), a PDA device (PDA: Personal Digital Assistant), a portable game machine, and a notebook personal computer device. The present invention relates to a non-contact charging device suitable for application to a charging device to be performed, and in particular, a mirror surface portion is provided at a location corresponding to the primary side transmission coil of the non-contact charging device, The present invention relates to a non-contact charging device that allows a device to be charged to be placed at an accurate position on the non-contact charging device by placing the device.

  In order to efficiently perform non-contact charging by placing the mobile terminal device serving as the secondary side on the cradle serving as the primary side of non-contact charging, the primary-side transmission coil provided in the cradle and the mobile terminal The center position of the secondary transmission coil provided in the device is within an allowable range, and the primary transmission coil of the cradle and the secondary transmission coil of the portable terminal device are opposed to each other. It is necessary to place the portable terminal device on the cradle. However, since the primary side transmission coil is housed in the cradle and the secondary side transmission coil is housed in the mobile terminal device, the mobile terminal device is within the allowable range with respect to the cradle. Is difficult to mount.

  Japanese Unexamined Patent Publication No. 2001-218391 (Patent Document 1) discloses a non-contact charging system in which non-contact charging of headphones is taken as an example. This contactless charging system is provided with a “mark” at the mounting position on the surface of the charger so that the headphones are mounted at a position where the power receiving coil of the headphones and the power transmitting coil of the charger are close to each other and face each other. ing. In addition, protrusions and dents are formed on the surface of the charger. Thus, even if the headphones are casually placed on the charger, the headphones are naturally placed within the allowable range.

JP 2001-218391 A (page 8, FIG. 7)

  However, in the case of the non-contact charging system disclosed in Patent Document 1, a protrusion or dent for alignment is provided on the surface of the charger in accordance with the shape of the device to be charged such as headphones placed on the charger. It is like that. For this reason, the shape of the charger becomes a “dedicated shape” of the device to be charged placed on the charger. If the shape of the device to be charged is changed, the shape of the charger needs to be changed accordingly. Therefore, there is a problem that the design and manufacture of a new charger is expensive.

  In addition, increase the area of the charger mounting base to a certain extent, and do not provide positioning protrusions or dents on the mounting base, but provide a reference mark on the mounting position of the device to be charged such as headphones. Thus, even when the shape of the device to be charged is changed, it can be continuously used as it is without changing the shape of the charger.

  However, in this case, it is necessary to place the device to be charged on a flat plate-shaped mounting table having an area larger than the area of the device to be charged, relying only on the “mark”, so that the above-mentioned tolerance for the charger is required. It becomes more difficult to place the device to be charged so as to be within the range.

  The present invention has been made in view of the above-described problems, and a non-contact charging apparatus capable of easily placing devices to be charged having various shapes at accurate positions on a mounting table, and The purpose is to provide a contactless charging system.

The non-contact charging apparatus according to the present invention is a means for solving the above-described problems,
A non-contact charging means including a primary transmission coil for performing non-contact charging on a device to be charged in a housing;
A mounting portion having a substantially flat plate shape with an area where the charged device can be mounted with a margin;
A mirror surface portion provided at a position on the mounting portion corresponding to the primary transmission coil and reflecting a predetermined mark provided at a position corresponding to the secondary transmission coil of the device to be charged. .

  According to the present invention, by providing a substantially flat plate-shaped mounting portion having an area where the charged device can be mounted with a margin, it is possible to mount the charged device of various shapes on the mounting portion. To do. In addition, during charging, a predetermined mark provided at a position corresponding to the secondary transmission coil of the device to be charged is reflected on the mirror surface portion provided on the placement portion while being covered on the placement portion. By placing the charging device, the primary side transmission coil of the non-contact charging device and the secondary side transmission coil of the device to be charged are easily positioned within a range where predetermined charging efficiency can be obtained.

Moreover, the non-contact charging system according to the present invention is a means for solving the above-described problems,
A device to be charged having a secondary transmission coil for performing non-contact charging in the housing, and having a predetermined mark at a position corresponding to the secondary transmission coil on the surface of the housing;
A non-contact charging means having a primary side transmission coil for performing non-contact charging on the device to be charged, and a substantially flat plate shape having an area where the device to be charged can be placed with a margin; A non-contact charging device comprising: a mounting portion; and a mirror surface portion provided at a position on the mounting portion corresponding to the primary transmission coil.
During charging, the non-contact charging device while reflecting the predetermined mark provided on the surface of the casing of the device to be charged with respect to the mirror surface portion provided on the mounting portion of the non-contact charging device By placing the device to be charged on the mounting part, the primary transmission coil of the non-contact charging device and the secondary transmission coil of the device to be charged obtain a predetermined charging efficiency. Is positioned within the possible range to perform non-contact charging.

  According to the present invention, by providing a substantially flat plate-shaped mounting portion having an area where the charged device can be mounted with a margin, it is possible to mount the charged device of various shapes on the mounting portion. To do. In addition, during charging, a predetermined mark provided at a position corresponding to the secondary transmission coil of the device to be charged is reflected on the mirror surface portion provided on the placement portion while being covered on the placement portion. By placing the charging device, the primary side transmission coil of the non-contact charging device and the secondary side transmission coil of the device to be charged are easily positioned within a range where predetermined charging efficiency can be obtained.

  Since the present invention has a substantially flat plate-shaped mounting portion with an area where the device to be charged can be mounted with a margin, the device to be charged having various shapes can be placed on the mounting portion. Contact charging can be enabled.

  In addition, while reflecting a predetermined mark provided at a position corresponding to the secondary transmission coil of the device to be charged with respect to the mirror surface portion provided on the mounting portion, the device to be charged is placed on the mounting portion. Since it can be mounted, the primary side transmission coil of the non-contact charging device and the secondary side transmission coil of the device to be charged are simply positioned within a range where predetermined charging efficiency can be obtained. Can be used for non-contact charging.

The present invention can be applied to a non-contact charging system that performs non-contact charging on a secondary battery (battery) provided in a device to be charged such as a mobile phone or a digital camera device.

[Configuration of Cradle and Mobile Phone]
The non-contact charging system according to the embodiment of the present invention includes a cradle 1 that performs non-contact charging on a device to be charged as shown in the cross-sectional view of FIG. The mobile phone 2 is one of the devices to be charged.

  The cradle 1 includes a primary transmission coil 3 that is a non-contact power transmission coil on the power transmission side, and a primary transmission coil 3 that performs non-contact charging based on a DC output from an AC adapter (AC: Alternate Current). Is formed by housing a control board 4 or the like for AC driving in a housing 5.

  The mobile phone 2 receives the AC power received from the primary transmission coil 3 of the cradle 1 via the secondary transmission coil 6 and the secondary transmission coil 6 which are non-contact power transmission coils on the power reception side. It is formed by storing a charge control board 8 or the like that performs charging by converting it into a battery 7 that is a secondary battery and storing it in a housing 9.

  FIG. 2 is a view of the mobile phone 2 placed on the cradle 1 as viewed from directly above. As can be seen from FIG. 2, the area of the placement portion 11 of the cradle 1 has a substantially flat plate shape with an area where the mobile phone 2 can be placed with a margin. For this reason, if it is a to-be-charged apparatus which can be mounted on this mounting part 11, not only a mobile telephone but the other to-be-charged apparatus, such as a digital camera apparatus and a portable game machine, can also be contactlessly charged It has become.

  Here, FIG. 3 shows a graph in which the relationship between the relative positional deviation between the primary transmission coil 3 and the secondary transmission coil 6 and the charging characteristics (output power) is measured. As shown in FIG. 4A, the graph shown in FIG. 3 shows the amount of deviation of the relative position between the primary transmission coil 3 (large diameter coil) and the secondary transmission coil 6 (small diameter coil). Is a graph obtained by measuring the charging characteristics while gradually increasing the amount of deviation by 1 mm from the state of “0 mm”. 4B shows a state in which the amount of displacement between the primary transmission coil 3 and the secondary transmission coil 6 is “3 mm”, and FIG. 4C shows the primary transmission. A state in which the relative positional deviation between the coil 3 and the secondary transmission coil 6 is “6 mm” is shown.

  From the graph of FIG. 3, the charging characteristics hardly deteriorate until the relative positional deviation between the primary transmission coil 3 and the secondary transmission coil 6 is “0 mm to 5 mm”. It can be seen that when the amount of misalignment is “6 mm or more”, the charging characteristics are rapidly deteriorated. Therefore, in this example, the cradle 1 is set so that the relative positional deviation between the primary transmission coil 3 and the secondary transmission coil 6 is within the range of “0 mm to 5 mm” (within the allowable range). It is necessary to place a device to be charged such as the mobile phone 2 on the top.

  However, as described above, the area of the placement portion 11 of the cradle 1 has a substantially flat plate shape with an area where the mobile phone 2 can be placed with a margin. Therefore, the relative positional deviation between the primary transmission coil 3 of the cradle 1 and the secondary transmission coil 6 of the device to be charged such as the mobile phone 2 is within the allowable range of “0 mm to 5 mm”. As described above, it is difficult to place the device to be charged on the placement unit 11.

  For this reason, the cradle 1 of the contactless charging system according to the present embodiment is provided with a mirror surface portion 15 at a position corresponding to the primary transmission coil 3 of the mounting portion 11 as shown in FIG. This mirror surface portion 15 has an overall size larger than that of the primary side transmission coil 3 and has a substantially circular tolerance mark 16 at a position corresponding to the center of the primary side transmission coil 3. ing. The diameter of the permissible range mark 16 is 1 cm (= radius 5 mm), and the relative positional deviation between the primary transmission coil 3 and the secondary transmission coil 6 described with reference to the graph of FIG. The allowable range is shown.

  In this example, since the limit of the amount of deviation between the primary transmission coil 3 and the secondary transmission coil 6 is 5 mm, the tolerance mark 16 has a diameter of 1 cm. Although set to (= radius 5 mm), this is merely an example. For this reason, the diameter of the tolerance mark 16 may be arbitrarily set based on the limit of the amount of deviation allowed in the relationship between the diameter of the primary transmission coil 3 and the diameter of the secondary transmission coil 6. Of course.

  The mirror surface portion 15 including the allowable range mark 16 is formed by performing silver resin plating on a portion corresponding to the mirror surface portion 15 on the placement portion 11. In addition to this resin plating, a mirror (or a member with good reflectivity that can be a mirror) may be provided in a portion corresponding to the mirror surface portion 15. However, it is preferable to form the mirror surface portion 15 using a non-metallic member or a non-magnetic member so as not to cause a reduction in efficiency of non-contact charging.

  On the other hand, the mobile phone 2 of the contactless charging system according to the present embodiment is provided with a center position mark 20 as shown in FIG. The center position mark 20 is provided at a position corresponding to the center of the secondary transmission coil 6, and the surface portion side on which the mobile phone 2 is placed opposite to the placement portion 11 of the cradle 1 during non-contact charging. Is provided.

That is, FIG. 2 shows the front surface portion of the mobile phone 2, and FIG. 5 shows the back surface portion of the mobile phone 2. In this example, the secondary transmission of the mobile phone 2 is performed. The coil 6 is provided in the vicinity of the back surface of the mobile phone 2. Therefore, the center position mark 20 is provided at a position corresponding to the center of the secondary transmission coil 6 on the back surface of the mobile phone 2.

[Non-contact charging operation]
Next, when performing the non-contact charging of the mobile phone 2 in the non-contact charging system of such an embodiment, the user can connect the back surface of the mobile phone 2 and the placement unit 11 of the cradle 1 as shown in FIG. The center position mark 20 provided on the back surface portion of the mobile phone 2 is projected on the tolerance mark 16 of the mirror surface portion 15 on the placement portion 11 while the mobile phone 2 is placed on the placement portion 11. Is gradually placed.

  As described above, since the tolerance range mark 16 has a mirror shape, the user looks at the center position mark 20 of the cellular phone 2 reflected on the tolerance range mark 16 while holding the cellular phone 2 on the placement unit 11. It will be placed on.

As described above, the permissible range mark 16 provided on the mounting portion 11 of the cradle 1 indicates the permissible range of the relative positional deviation between the primary side transmission coil 3 and the secondary side transmission coil 6. It has the diameter shown. For this reason, by placing the mobile phone 2 on the mounting portion 11 in a state where the center position mark 20 of the mobile phone 2 is reflected in the tolerance mark 16, the primary transmission coil 3 of the cradle 1 and the mobile phone 2 can be placed on the placing portion 11 with the relative deviation from the secondary transmission coil 6 within the above-mentioned allowable range, and with a good charging efficiency. Contact charging can be performed.

[Effect of the embodiment]
As is clear from the above description, the contactless charging system of this embodiment is configured such that the center of the primary transmission coil 3 is located on the mounting portion 11 of the cradle 1 at a position corresponding to the primary transmission coil 3. A mirror surface portion 15 including an allowable range mark 16 corresponding to is provided, and a center position mark 20 is provided at a position corresponding to the center of the secondary transmission coil 6 of the mobile phone 2. Then, the mobile phone 2 is placed on the placement unit 11 while the center position mark 20 of the mobile phone 2 is projected on the tolerance mark 16 of the placement unit 11.

  The allowable range mark 16 provided on the mounting portion 11 of the cradle 1 has a diameter indicating the allowable range of the relative positional deviation amount between the primary transmission coil 3 and the secondary transmission coil 6. Therefore, when the mobile phone 2 is placed on the placement portion 11 in a state where the center position mark 20 of the mobile phone 2 is reflected in the permissible range mark 16, the primary transmission coil 3 of the cradle 1 and the mobile phone 2 can be carried. The mobile phone 2 can be placed on the placement unit 11 so that the relative displacement of the phone 2 from the secondary transmission coil 6 is within the allowable range. Thereby, it is possible to perform non-contact charging with good charging efficiency.

  In addition, the placement unit 11 of the cradle 1 has a substantially flat plate shape with an area where a charged device such as the mobile phone 2 can be placed with a margin. For this reason, various types of charged devices can be placed on the placement portion 11 to enable non-contact charging. That is, different types of devices such as a mobile phone and a digital camera device can be contactlessly charged with this single cradle 11. Also, with the release of a new mobile phone model, Even when the shape of the mobile phone is changed, the single cradle 11 can be contactlessly charged. The user does not need to replace the cradle every time the mobile phone is replaced, and the manufacturer does not need to design and manufacture a dedicated cradle every time a new model mobile phone is released. Therefore, it is possible to bring economic benefits to both the user side and the manufacturer side.

  In the description of the above-described embodiment, the mirror surface portion 15 provided on the placement portion 11 of the cradle 1 has a size larger than that of the primary transmission coil 3, but this is illustrated in FIG. ), The mirror surface portion 15 may be provided with substantially the same size (diameter) as the primary transmission coil 3. In this case, since the diameter of the mirror surface portion 15 and the diameter of the primary transmission coil 3 are substantially the same, the position and size of the primary transmission coil 3 can be indirectly shown to the user. The cellular phone 2 can be easily placed within the allowable range, and the same effect as described above can be obtained.

The mirror surface portion 15 has a mirror-like tolerance mark 16 at a position corresponding to the center of the primary transmission coil 3, but as shown in FIG. The mirror-like tolerance range mark 16 may be provided only at the position corresponding to the center (in this case, the mirror surface portion 15 = the mirror-like tolerance range mark 16). Even in this case, since the mobile phone 2 can be placed on the placement portion 11 of the cradle 11 while the center position mark 20 of the mobile phone 2 is projected on the tolerance mark 16, the same effect as described above can be obtained. Can do.

[Modification with a liquid crystal display as a mirror surface]
In the description of the embodiment described above, the mirror surface portion 15 provided with resin plating or the like is provided. However, the mirror surface portion 15 shown in FIG. 5 or FIG. 6A or the mirror surface portion 15 shown in FIG. A liquid crystal display unit may be provided as the specular tolerance mark 16. In this case, the control unit provided on the control board 4 shown in FIG. 1 controls the display of the liquid crystal display unit so as to form a mirror surface at the time of non-contact charging. Thereby, the mirror surface part 15 or the mirror-like tolerance | permissible_range mark 16 can be formed on the mounting part 11 only at the time of non-contact charge, and the same effect as the above can be acquired.

[Modification with mirror surface storage / exposure mechanism]
As shown in FIG. 7A, an opening / closing door 30 may be provided on the mirror surface portion 15 to which the above-described resin plating or the like is applied, the tolerance mark 16 or the front surface of the liquid crystal display portion. This open / close door 30 can be opened and closed by a user's manual slide operation. When not charging, the user manually closes the open / close door 30. As a result, as shown in FIG. 7A, the mirror surface portion 15 and the like are covered with the opening / closing door 30, and the mirror surface portion 15 and the like are housed in the cradle 1.

  On the other hand, at the time of charging, the user manually opens and closes the opening / closing door 30 in the direction of the arrow shown in FIG. As a result, the mirror surface 15 or the like that has been covered with the opening / closing door 30 until then is exposed as shown in FIG. 7B, enabling non-contact charging, and obtaining the same effect as described above. it can. In addition, by forming the opening / closing door 30 with a member that blocks electromagnetic waves, even if electromagnetic waves are accidentally emitted from the primary transmission coil 3 during non-charging, the electromagnetic waves are blocked by the opening / closing door 30. The safety of the cradle 1 can be improved.

  Although the opening / closing door 30 is manually opened / closed, the opening / closing door 30 may be configured to transmit the rotational force of the motor to the opening / closing door 30 and automatically slide the opening / closing door 30 along the slide groove. In this case, the control unit provided on the control board 4 shown in FIG. 1 rotates the motor to open / close the door 30 when charging, and rotates the motor to rotate when not charging. The open / close door 30 is controlled to be closed. As a result, the same effects as described above can be obtained, and the opening / closing of the opening / closing door 30 can be automated.

In this example, the opening / closing door 30 is slid to store / expose the mirror surface portion 15 and the like, but the mirror surface portion 15 itself is slid / moved manually or automatically to be stored / exposed. May be. Even in this case, the same effect as described above can be obtained.

  Lastly, in the description of the above-described embodiment, an example in which the mobile phone 2 is contactlessly charged with the cradle 1 has been described. However, as described above, the cradle 1 can be a PHS phone (PHS: PHS) in addition to the mobile phone 2. Non-contact charging is also possible for other charged devices such as Personal Handyphone System), PDA devices (PDA: Personal Digital Assistant), portable game machines, and notebook personal computer devices. In any case, the same effect as described above can be obtained.

  The above description of the embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention. I add that there is something.

1 is a cross-sectional view of a cradle and a mobile phone of a contactless charging system according to an embodiment to which the present invention is applied. It is the figure which looked at the state by which the mobile telephone was mounted on the cradle of the non-contact charge system used as embodiment from right above. It is a figure which shows the relationship between the relative deviation | shift amount of the primary side transmission coil provided in the cradle side, and the secondary transmission coil provided in the to-be-charged device side, and transmission efficiency. It is a figure which shows the relative shift | offset | difference of the primary side transmission coil provided in the cradle side, and the secondary transmission coil provided in the to-be-charged apparatus side. It is a figure which shows a mode that a mobile telephone is mounted on the cradle of the non-contact charge system used as embodiment. It is a figure which shows the modification of the mirror surface part provided on the cradle of the non-contact charge system used as embodiment. It is a figure which shows the modification which provided the opening-and-closing door in the position corresponded to the mirror surface part of the cradle of the non-contact charge system used as embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Cradle, 2 Cellular phone, 3 Cradle primary side transmission coil, 4 Cradle control board, 5 Cradle casing, 6 Cell phone secondary side transmission coil, 7 Non-contact chargeable secondary battery (battery ), 8 mobile phone charging control board, 9 mobile phone housing, 11 cradle placement part, 15 mirror surface provided on the cradle, 16 relative to the primary side transmission coil and secondary side transmission coil An allowable range mark indicating the allowable range of the shift amount, 20 A center position mark indicating the center of the secondary transmission coil provided on the mobile phone side, 30 An opening / closing door for storing / exposing the mirror surface portion

Claims (5)

A non-contact charging means including a primary transmission coil for performing non-contact charging on a device to be charged in a housing;
A mounting portion having a substantially flat plate shape with an area where the charged device can be mounted with a margin;
A mirror surface portion provided at a position on the mounting portion corresponding to the primary transmission coil and reflecting a predetermined mark provided at a position corresponding to the secondary transmission coil of the device to be charged. Non-contact charging device. The contactless charging device according to claim 1,
The said mirror surface part is provided in the range which can obtain predetermined | prescribed charging efficiency on the said mounting part. The non-contact charging device characterized by the above-mentioned. The contactless charging device according to claim 1 or 2,
A non-contact charging apparatus comprising: a storing / exposing means for storing the mirror surface portion in the housing when not charging, and exposing the mirror surface portion to the mounting portion when charging. It is a non-contact charging device according to any one of claims 1 to 3,
The mirror surface part is a liquid crystal display part,
A non-contact charging device comprising display control means for controlling display of the liquid crystal display unit so as to form a mirror surface during charging. A device to be charged having a secondary transmission coil for performing non-contact charging in the housing, and having a predetermined mark at a position corresponding to the secondary transmission coil on the surface of the housing;
A non-contact charging means having a primary side transmission coil for performing non-contact charging on the device to be charged, and a substantially flat plate shape having an area where the device to be charged can be placed with a margin; A non-contact charging device comprising: a mounting portion; and a mirror surface portion provided at a position on the mounting portion corresponding to the primary transmission coil.
During charging, the non-contact charging device while reflecting the predetermined mark provided on the surface of the casing of the device to be charged with respect to the mirror surface portion provided on the mounting portion of the non-contact charging device By placing the device to be charged on the mounting part, the primary transmission coil of the non-contact charging device and the secondary transmission coil of the device to be charged obtain a predetermined charging efficiency. Is a contactless charging system that performs contactless charging within a possible range.

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