JP2003125545A - Electronic camera and charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent increase in the volume and the weight of an electronic camera which uses a noncontact charging system and to reduce the influences of magnetic fields produced by a charger on the electronic circuit in the electronic camera. SOLUTION: The electronic camera 100 is provided with a housing chamber 38 for housing a rechargeable battery 19, and secondary coils 22 for receiving electricity are placed in between the housing chamber 38 and the enclosure of the electronic camera 100. When the rechargeable battery 19 is recharged, the secondary coils 22 are placed in strong magnetic fields produced by the charger. However, the rechargeable battery 19 functions as a magnetic shield, and the influences of the magnetic fields on the electronic circuit formed on a main board 40 placed opposite to the secondary coils 22 with the rechargeable battery 19 in-between are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique used in an electronic camera, and more particularly to a technique for charging a secondary battery included in an electronic camera that uses a secondary battery as a power source.

[0002]

2. Description of the Related Art An invention relating to a technique of charging a secondary battery, which is a rechargeable battery as a power source, for charging this battery is disclosed in Japanese Patent Laid-Open No. 2001-69388. In this publication, a so-called non-contact type charging system is adopted in which electric power is supplied from an electric charger to an electronic camera by using an electromagnetic induction effect, and a battery provided in the electronic camera is charged by the supplied electric power. Electronic cameras are disclosed.

In such a non-contact type charging system, the battery can be charged without providing a metal terminal for charging on the housing surface of the electronic camera, so that the metal terminal exposed on the housing surface can be removed. There is an advantage that it is not necessary to take measures for maintaining the conductivity while protecting from the external environment, and the electronic camera can be downsized by the amount of the metal terminals omitted.

[0004]

When the non-contact type charging system is adopted in the electronic camera, the electronic camera is provided with a power receiving coil for generating an electromotive force by a fluctuating magnetic field generated in the charging device. When charging is performed, the portion of the electronic camera provided with the power receiving coil is placed in a magnetic field whose strength fluctuates drastically. At this time, the magnetic field also causes electromotive force due to the electromagnetic induction action in other electronic circuits provided inside the electronic camera. Since this electromotive force is observed as noise, it adversely affects the operation of this electronic circuit.

Regarding this problem, inside the electronic camera, a metal plate functioning as a magnetic shield is provided between the power receiving coil and the substrate on which the electronic circuit is formed to protect the electronic circuit from the magnetic field generated by the charging device. There is a countermeasure to do so. However, the provision of this metal plate causes an increase in the volume and weight of the electronic camera, and reduces the advantage of the volume and weight of the electronic camera by omitting the metal terminals from the surface of the housing.

In view of the above problems, in an electronic camera employing a non-contact type charging system, the influence of a magnetic field generated by the charging device on an electronic circuit inside the electronic camera is reduced while suppressing an increase in volume and weight. That is the problem to be solved by the present invention.

[0007]

An electronic camera according to one aspect of the present invention is an electronic camera that charges a secondary battery, which is a power source, using electromotive force generated by an electromagnetic induction effect of a magnetic field generated by a charging device. A camera, comprising: an exterior housing of the electronic camera that houses the secondary battery therein; and a power receiving coil that generates electromotive force by a magnetic field generated by the charging device, wherein the power receiving coil is the exterior. By being arranged inside the housing so as to be arranged at a position between the external housing and the secondary battery when the secondary battery is housed inside the external housing. The above-mentioned problems are solved.

At this time, the power receiving coil is arranged such that the power receiving coil is arranged at a position covered by the secondary battery when the secondary battery is housed inside the exterior casing. Alternatively, or when the secondary battery is housed inside the exterior housing, the secondary battery is provided between the substrate to which the electronic circuit component provided in the electronic camera is fixed and the power receiving coil. The secondary battery may be arranged at a position where it will be located.

According to this structure, since the power receiving coil is arranged inside the exterior housing of the electronic camera and at the position on the front surface side with respect to the secondary battery, the non-contact type charging described above is possible. . Also, when the secondary battery is charged, the power receiving coil is placed in the strong magnetic field generated by the charging device.
Since the secondary battery functions as a magnetic shield, the magnetic field is weakened in the space on the opposite side of the power receiving coil with the secondary battery in between. Therefore, by arranging the electronic circuit in this space, the magnetic field generated by the charging device is generated by the electronic field inside the electronic camera without providing a metal plate for magnetic shield and increasing the volume and weight of the electronic camera. The influence on the circuit can be reduced.

In the above-described electronic camera according to the present invention, the power receiving coil may be arranged along a portion of the exterior housing which is a front surface of the electronic camera. Further, at this time, the power receiving coil is
It may be configured to be arranged in a portion of the exterior housing that is located on the left side when viewed from the front of the electronic camera.

Alternatively, the power receiving coil may be arranged so as to be arranged along a portion of the exterior housing which is a left side surface of the electronic camera. In this specification, the surface of the electronic camera that faces the subject when the subject image is captured is referred to as the front of the electronic camera.

When an electronic camera is held with one hand for shooting, a release button for instructing a shooting operation is often provided to the left of the front of the electronic camera. The part on the left side is held when viewed from the front. According to these configurations described above, since a relatively heavy secondary battery can be stored inside the electronic camera on the left side when viewed from the front, it is possible to hold the electronic camera with one hand and take a picture. The stability of can be increased.

Further, in the above-described electronic camera according to the present invention, the power receiving coil may be arranged along a portion of the exterior housing which is a back surface of the electronic camera. Since it is often easy to secure a wide and flat surface on the back of the electronic camera,
By disposing the power receiving coil in such a portion, it becomes possible to use the power receiving coil having a large inner diameter capable of efficiently generating an electromotive force in the electronic camera.

Further, at this time, the power receiving coil may be arranged at a portion of the exterior housing which is located on the left side of the front side of the electronic camera, and by doing so, as described above. , It is possible to enhance the stability when holding the electronic camera with one hand and taking a picture.

In the electronic camera according to the present invention described above, a display means may be further provided inside the power receiving coil. Here, the inside of the power receiving coil means the inside of the surface surrounded by the wound conductive wire forming the power receiving coil, but the display means is not provided so as to be strictly included in the surface. However, display means may be provided before and after the surface. Further, the display means may be any means as long as it visually transmits information by emitting light or reflecting light.

According to this structure, the inside of the power receiving coil can be effectively used when it is hollow. A charging device according to another aspect of the present invention is a charging device that generates a magnetic field for generating an electromotive force for charging a secondary battery used as a power source of an electronic camera by an electromagnetic induction action. The electronic camera includes a power transmission coil that generates the magnetic field, and the electronic camera includes an outer casing of the electronic camera that houses the secondary battery therein, and a power receiving coil that generates electromotive force by the magnetic field. The power receiving coil is located inside the exterior housing, and is located between the exterior housing and the secondary battery when the secondary battery is housed inside the exterior housing. The above-mentioned problems are solved by arranging so as to be arranged at.

This charging device is used for charging the secondary battery in the electronic camera according to the present invention described above, and is an invention of a sub-combination to the invention of the combination of the charging device and the electronic camera. Is.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an electrical configuration of an electronic camera system embodying the present invention. The camera system shown in the figure includes an electronic camera 100 and a stand 200 dedicated to the electronic camera 100, which also serves as a charging device. In addition, the stand 200 is a cradle (Crad
le) is sometimes called.

First, the electrical configuration of the electronic camera 100 shown in FIG. 1 will be described. Inside the electronic camera 100, the CPU 1, the imaging processing unit 4, the DRAM 5, the image processing unit 6, the flash memory 7, the memory card 8, and the USB I.
/ F9, SIF driver 11, and LCD driver 13 are all connected to the bus 12, and CP is connected between them.
Data can be exchanged under the control of the bus 12 by U1.

A CPU (Central Processing Unit) 1 is a central processing unit for controlling the operation of the electronic camera 100 as a whole. The taking lens 2 forms a subject image on the light receiving surface of the image sensor 3. The image pickup element 3 photoelectrically converts the subject image formed on the light receiving surface and outputs an analog signal indicating an image representing the subject image.

The image pickup processing section 4 is a CDS (Correlated Dou
ble Sampling: Correlated double sampling circuit), AGC
(Automatic Gain Control: automatic gain control circuit), an analog / digital conversion circuit, etc.
Under the control of PU1, the reset noise included in the analog signal output from the image sensor 3 is removed, the signal level is adjusted, and the like, and the analog signal after these processes is performed is converted into digital data.

The digital data that is output from the image pickup processing section 4 and represents the image representing the subject image will be referred to as "captured image" hereinafter. DRAM
The (Dynamic Random Access Memory) 5 is an image pickup processing unit 4.
It is used as a buffer memory for temporarily storing the photographed image output from the camera, the photographed image after the image processing by the image processing unit 6 and the like, and also as a working storage area for various processes by the CPU 1. The memory used.

The image processing unit 6 performs image correction processing such as γ correction and white balance performed on the photographed image output from the image pickup processing unit 4 based on an instruction from the CPU 1, and image data representing the image. Performs various processes such as image compression / decompression for recording / playback. In addition, in the compression / decompression processing of image data, for example, JPEG (Joint Photograp
decompression processing and compression processing according to the hic Experts Group) method are performed.

The flash memory 7 stores in advance a control program for causing the CPU 1 to control the operation of the entire electronic camera 100. The CPU 1 controls the operation of the entire electronic camera by reading and executing the control program stored in the flash memory 7.

The memory card 8 is a memory for storing image data and can be attached to and detached from the electronic camera 100. USB (Universal Serial Bus) I / F 9a
It provides an interface function for exchanging various data between the CPU 1 and an external device such as a personal computer connected to the USB terminal 10a.

SIF (Serial Interface) driver 11
Provides an interface function for transmitting image data and the like from the electronic camera 100 to the stand 200, and converts image data, which is parallel data sent via the bus 12, into serial data.

The light emitting / receiving section 12a is an LED (Light Emitting).
Diode) and a phototransistor, and when the electronic camera 100 is mounted on the stand 200, various data are exchanged with the stand 200 using light as a transmission medium. CPU1, USB I
The / F9a and the SIF driver 11 can transmit serial data to the stand 200 via the light emitting / receiving unit 12a, and the CPU 1 and the USB I / F 9a.
Can also receive serial data sent from the stand 200.

An LCD (Liquid Crystal Display) driver 13 drives the LCD display 14 and causes the LCD display 14 to display an image represented by the image data sent via the bus 12. The LCD display 14 is a liquid crystal monitor that displays an image.

The self-LED 15 is turned on when the electronic camera 100 performs so-called self-timer photographing.
By turning off the light at various intervals, the person who is the subject is visually notified of the timing of shooting. The operation instruction unit 16 includes various keys and switches operated by the user.
It is configured with buttons and the like. CPU 1 is operation instruction unit 1
The contents of the operation performed on 6 are acquired, and the instruction from the user corresponding to the contents is received.

The remote control light receiving unit 17 receives an optical signal sent from a remote controller (not shown) and sends data corresponding to the optical signal to the CPU 1. The CPU 1 performs a predetermined process based on the content of the data sent from the remote control light receiving unit 17. For example, when the remote controller light receiving unit 17 receives an optical signal indicating an instruction to perform a shooting operation from a remote controller (not shown), the CPU 1 performs a control process for the shooting operation.

The power supply section 18 supplies electric power stabilized to a predetermined voltage to each section of the electronic camera 100. The rechargeable battery 19 is a battery that serves as a power source of the electronic camera 100, and a rechargeable secondary battery such as a nicad battery, a nickel hydride battery, or a lithium ion battery is used.

The DC input terminal 20 is a terminal to which the DC power output from the external power source is input when the electronic camera 100 is operated using the external power source instead of the rechargeable battery 19. The charging unit 21 charges the rechargeable battery 19 when an electromotive force of a predetermined voltage value or more is excited in the secondary coil 22. Further, the electromotive force generated in the secondary coil 22 is also led from the charging unit 21 to the power supply unit 18, and the electronic camera 10
When 0 is mounted on the stand 200, the electronic camera 100 can be operated by using the stand 200 as a power source instead of the rechargeable battery 19 while keeping the DC input terminal 20 open.

The secondary coil 22 is a coil in which electromotive force is generated by the magnetic field generated by the stand 200 when the electronic camera 100 is placed on the stand 200.
It functions as a power-receiving coil in a non-contact charging system that utilizes electromagnetic induction. The electronic camera 100 is configured as described above.

Next, the electrical configuration of the stand 200 in FIG. 1 will be described. The light emitting / receiving unit 12b is the electronic camera 1.
This is the same as the light receiving and emitting unit 12a of 00, and exchanges various data with the electronic camera 100 using light as a transmission medium. The USB I / F 9b can transmit serial data to the electronic camera 100 via the light emitting / receiving unit 12b, and the USB I / F 9b and the video I / F 23 can read serial data sent from the electronic camera 100. It is possible to receive.

The USB I / F 9b is the electronic camera 1
This is similar to the USB I / F 9a of 00, and when the electronic camera 100 is mounted on the stand 200, even if an external device such as a personal computer is connected to the USB terminal 10b instead of the USB terminal 10a, Various data can be exchanged between the external device and the CPU 1 of the electronic camera 100.

The video I / F 23 is used by the electronic camera 1
When 00 is placed on the stand 200, the image data sent from the electronic camera 100 via the light emitting / receiving unit 12b is converted into a video signal. The video signal output from the video I / F 23 is guided to the video output terminal 24. When a home television device is connected to the video output terminal 24, the image represented by the image data is the television device. Is displayed in.

The AC / DC converter 25 is connected to the A
The AC voltage supplied via the C power cord 26 is stepped down to a predetermined voltage and rectified into a DC voltage, stabilized to a predetermined voltage, and electric power is supplied to each part of the stand 200. A
One end of a DC power cord 27 having a length of several meters is connected to the C / DC conversion unit 25, and if the other end is connected to a DC input terminal of the electronic camera 100, the electronic camera 100 will stand 200. The stand 200 can be used as an external power source of the electronic camera 100 even when it is not mounted on the stand.

The oscillator 28 generates a high frequency wave having a predetermined frequency. The primary coil 29 is a coil that generates a magnetic field in which the number of magnetic fluxes changes with time when the high frequency generated in the oscillation unit 28 is input, and is a non-contact charging method that uses electromagnetic induction. Function as a power transmission coil. In the secondary coil 22 of the electronic camera 100, an electromotive force is generated by being placed in the magnetic field generated by the primary coil 29.

The stand 200 is constructed as described above. Next, FIG. 2 will be described. 1 is an external view of the electronic camera 100 shown in FIG. 1, where (a) is a view of the electronic camera 100 from above, (b) is a view of the electronic camera 100 from the front, and (c) is an electronic view. It is the figure which looked at camera 100 from the bottom.

In FIG. 2, the same components as those shown in FIG. 1 are designated by the same reference numerals. As shown in FIG. 2, the electronic camera 100 has a release button 31 for instructing a photographing operation, which is one of the operation instructing units 16.
Is provided on the upper left side of the electronic camera 100 when viewed from the front.

The transparent portion 32 provided on the front surface of the electronic camera 100 emits light emitted from the self-LED 15 arranged inside the housing of the electronic camera 100.
It is for making it visible from the outside of 0. The material of the transparent portion 32 is, for example, acrylic resin.

The front of the electronic camera 100 is shown in FIG.
Is provided with a strobe 33, which is illumination (not shown) for nighttime photography, and a lens frame 34 for holding the taking lens 2 is provided on the front right side of the electronic camera 100. On the bottom surface of the electronic camera 100, the electronic camera 100
The rechargeable battery 19 that can be attached to and detached from the electronic camera 100
Battery lid 3 for sealing the opening for storage inside
5 is provided to the left of the front of the electronic camera 100. The battery lid 35 can be opened and closed with a hinge 36 as a fulcrum.

In addition, a tripod screw hole 37 for fixing the electronic camera 100 to a tripod is provided on the bottom surface of the electronic camera 100.
Is provided. Next, FIG. 3 will be described. This figure is a diagram showing a first example of the main internal structure of the electronic camera 100 shown in FIG. In FIG. 3, (a) is a perspective view of the internal structure of the electronic camera 100 when viewed from above, and (b) is a transparent view of the internal structure of the electronic camera 100 when viewed from the front. It is a figure.

In FIG. 3, constituent elements having the same functions as those shown in FIG. 1 or 2 are designated by the same reference numerals. As described above, the rechargeable battery 19 is attachable to and detachable from the electronic camera 100, and is stored in the storage chamber 38. The storage chamber 38 is provided inside the electronic camera 100 on the left side when viewed from the front side, and has an opening portion on the bottom surface of the electronic camera 100. The rechargeable battery 19 is stored in the storage chamber 31 through this opening. Although not shown in FIG. 3, the electronic camera 100 is provided with the battery lid 35 that can be opened and closed as described above. By closing the battery lid 35, the opening of the storage chamber 31 is sealed. To be done.

In this way, the storage chamber 38 is set in the electronic camera 10
Since the rechargeable battery 19 having a relatively large weight is provided so as to be housed inside the left side of the electronic camera 0, the rechargeable battery 19 is disposed to the left side of the electronic camera in the same manner as the release button 31. Therefore, it is possible to enhance the stability when the electronic camera is held with one hand to take a picture.

Further, the substrate 39 to which the thin secondary coil 22 is fixed is arranged so as to be sandwiched between the storage chamber 38 and the front housing of the electronic camera 100. That is, the secondary coil 22 is provided along the inner surface of the housing on the front side of the electronic camera 100. When the secondary coil 22 is placed in the magnetic field generated by the primary coil 29 installed on the stand 200, an electromotive force is generated in the secondary coil 22.

The electronic camera 100 is mounted on the stand 200.
When the space between the primary coil 29 and the secondary coil 22 when mounted on the table is narrow, power can be efficiently supplied from the stand 200 to the electronic camera 100. Therefore, from the viewpoint of power supply efficiency, the electronic camera It is desirable that the thickness of the housing in front of 100 is thin. In addition, it is preferable to use a material having a low magnetic permeability as the material of the housing on the front of the electronic camera 100 because the magnetic shielding effect is less.

The shape of the secondary coil 22 (winding method)
3 is shown to be wound in an elliptical shape in FIG. 3, but if it is possible to generate sufficient electromotive force for charging the rechargeable battery 19 based on the magnetic field generated by the stand 200. Other shapes such as a circular shape and a square shape may be used.

At the position on the substrate 39 corresponding to the transparent portion 35 provided on the front surface of the electronic camera 100, the self LE is provided.
D15 is fixed, and the light emitted from the self-LED 15 can be visually recognized from the outside of the housing of the electronic camera 100 through the transparent portion 35 provided on the front surface of the electronic camera 100.

Since the self-LED 15 is provided in this portion, the hollow portion at the center of the secondary coil 22 is effectively used, and restrictions on the arrangement of other components on the front side of the electronic camera 100 are alleviated. Main electronic components except the secondary coil 22 fixed to the substrate 39 and the self-LED 15 are arranged and wired on the main substrate 40, and an electronic circuit is formed therein. The main substrate 40 is arranged along the back side inside the electronic camera 100. Therefore, the main substrate 40 and the substrate 39 are in a positional relationship of sandwiching the storage chamber 38 of the rechargeable battery 19. Such a positional relationship is adopted in which the secondary coil 22 is covered by the rechargeable battery 19 stored in the storage chamber 38 when viewed from the main board 40, and the secondary coil 22 is shielded when viewed from the main board 40 by the rechargeable battery 19. By doing so, when the charging operation of the rechargeable battery 19 is performed, it is placed in a strong magnetic field generated by the stand 200, with respect to the part of the main substrate 40 located on the left side when viewed from the front of the electronic camera 100,
Since the metal part such as the housing of the rechargeable battery 19 itself housed in the housing chamber 38 exerts the effect of magnetic shielding, the magnetic field thereof has an adverse effect on the electronic circuits formed on the main board 40, such as noise. It will be reduced. Further, since the positions of the main substrate 40 and the substrate 39 are separated by the thickness of the rechargeable battery 19,
Since the distance between the primary coil 29 of the stand 200, which is located near the secondary coil 22 at the time of charging, and the main board 40 is also increased, the magnetic field generated by the primary coil 29 is weakened at the position of the main board 40. This also reduces the adverse effects of noise and the like exerted by the magnetic field on the electronic circuits formed on the main substrate 40.

The secondary coil 22 and the self-LED 15 fixed to the substrate 39 are mounted on the flexible substrate 41.
The charging unit 21 and the CP disposed on the main board 40 via the
It is electrically connected to an electronic circuit such as U1. Other,
In FIG. 3, the LCD display 14 is an electronic camera 100.
It is shown to be provided on the back of the. The electronic camera 100 employs a so-called collapsible type,
As shown in FIG. 3A, the lens frame 34 is housed inside the housing of the electronic camera 100 when shooting is not performed.

Next, FIG. 4 will be described. The same figure is shown in FIG.
7 shows an example of the structure of a stand 200 used for the electronic camera 100 shown in FIG. In FIG. 4, (a)
FIG. 3A is a front view of the electronic camera 100 mounted on a stand 200, and FIG. 4B is a left side view of the same state.

In FIG. 4, the same components as those shown in FIG. 1, FIG. 2 or FIG. 3 are designated by the same reference numerals. As shown in FIG. 4A, the electronic camera 100
Is the direction in which its front face and the front face of the stand 200 contact,
That is, even when the electronic camera 100 is placed on the stand 200, the LCD display 14 provided on the back surface of the electronic camera 100 can be viewed, and the electronic camera 100 is oriented vertically, that is, as shown in FIG. The electronic camera 10 is rotated 90 degrees with respect to the state of FIG.
0 is placed so that the left side surface thereof faces downward when viewed from the front.

As shown in FIG. 4B, the electronic camera 10
When 0 is placed on the stand 200, the LCD display 14 provided on the back surface of the electronic camera 100 is in a state of looking diagonally upward. This is to improve the visibility of the image displayed on the LCD display 14 when the electronic camera 100 is allowed to perform the image reproducing operation while being placed on the stand 200.

Further, as shown in FIG. 4B, the primary coil 29 is arranged inside the housing of the stand 200. From the viewpoint of the efficiency of power supply as described above, the electronic camera 1 is used.
2 which is provided on the front side when 00 is placed
It is desirable to be arranged in a position parallel to and opposite to the secondary coil 22, and further, it is desirable that the distance between the primary coil 29 and the secondary coil 22 when the electronic camera 100 is mounted be as short as possible. .

4, the USB terminal 10b and the video output terminal 24 are provided on the left side surface of the stand 200, and the AC power cord 26 is provided on the stand 20.
It is shown that it is drawn into the inside of the stand 200 from the right side surface of 0. Electronic camera 100 and stand 2
Since 00 has the above-described configuration and structure,
The rechargeable battery 19 can be charged by mounting the electronic camera 100 on the stand 200 without providing a metal terminal for charging the electronic camera 100 on the surface of the housing.

Hereinafter, the electronic camera 100 and the stand 20 will be described.
Another configuration example of 0 will be described. In the following description, the same reference numerals will be given to the same components having the same functions as those shown in the drawings described above, and in the following description, some components will not be described in detail. The description is omitted.

First, FIG. 5 will be described. The figure shows a second example of the main internal structure of the electronic camera 100 embodying the present invention. In FIG. 5, (a) is a perspective view of the internal structure of the electronic camera 100 when viewed from above, and (b) is a perspective view of the internal structure of the electronic camera 100 when viewed from the front, (C) is an electronic camera 100
It is the figure which looked through the internal structure when seeing from the left side.

The major difference between the second example of the structure of the electronic camera 100 shown in FIG. 5 and the first example of the structure of the electronic camera 100 shown in FIG. 3 is the substrate 39 to which the secondary coil 22 is fixed. However, it is arranged so as to be sandwiched between the storage chamber 38 and the left side housing of the electronic camera 100, not between the storage chamber 38 and the front housing of the electronic camera 100. .

By adopting such a structure, the electronic camera 100 is placed in the strong magnetic field generated by the stand 200 during the charging operation of the rechargeable battery 19.
When viewed from the front of the battery, the metal portion such as the casing of the rechargeable battery 19 itself housed in the housing chamber 38 has a magnetic shielding effect, as in the first example. Since it is effective, the stand 20 is used during the charging operation of the rechargeable battery 19.
The average strength of the magnetic field generated by 0 on the main substrate 40 on which the electronic circuit is formed is smaller than that in the first example. As a result, the magnetic field is
The adverse effects of noise and the like on the electronic circuit configured above are significantly reduced.

In the second example shown in FIG. 5 and the first example shown in FIG. 3, the orientation of the storage chamber 38 for storing the rechargeable battery 19 is 9 when viewed from the top of the electronic camera 100.
Although it rotates 0 degrees, it is possible to obtain a certain magnetic shield effect in either direction.

Next, FIG. 6 will be described. The same figure is shown in FIG.
7 shows an example of the structure of a stand 200 used for the electronic camera 100 shown in FIG. In FIG. 6, (a)
FIG. 3A is a front view of the electronic camera 100 mounted on a stand 200, and FIG. 4B is a left side view of the same state.

The difference between the structure of the stand 200 shown in FIG. 6 and the structure of the stand 200 shown in FIG.
, But the other structures are the same. Also in the stand 200 shown in FIG. 6, the position of the primary coil 29 is the same as the position of the primary coil 29 in the housing of the stand 200 on which the electronic camera 100 is mounted from the viewpoint of the efficiency of power supply as described above. When the electronic camera 100 is mounted, the primary coil 29 and the secondary coil 22 are preferably arranged in parallel and opposite to the secondary coil 22 provided on the bottom surface side. It is desirable that the distance between and is as short as possible. Also in the example shown in FIG. 6, the primary coil 29 is arranged at a position that exactly meets these requirements.

Even when the electronic camera 100 and the stand 200 have the configurations and structures shown in FIGS. 5 and 6, respectively, the rechargeable battery 19 can be charged without providing the electronic camera 100 with a metal terminal for charging on the surface of the housing. Can be done. Next, FIG. 7 will be described. The figure shows a third example of the main internal structure of the electronic camera 100 embodying the present invention. In the figure, (a) shows the electronic camera 100.
A perspective view of the internal structure when viewed from the back,
FIG. 3B is a diagram showing the internal structure of the electronic camera 100 seen through from above. Note that, in FIG. 7A, the top and bottom of the electronic camera 100 are drawn upside down, and the upper surface faces downward.

The major difference between the third example of the structure of the electronic camera 100 shown in FIG. 7 and the first example of the structure of the electronic camera 100 shown in FIG. 3 is the substrate 39 to which the secondary coil 22 is fixed. However, it is arranged so as to be sandwiched between the storage chamber 38 and the rear housing of the electronic camera 100, not between the storage chamber 38 and the front housing of the electronic camera 100. In the third example, the storage chamber 38
Since the position inside the electronic camera 100 is closer to the back side than in the first example, the main substrate 40 used in the first example can be arranged inside the electronic camera 100 as it is. Have difficulty. Therefore, in the third example shown in FIG. 7, a main board 40 for fixing and wiring electronic components to form an electronic circuit is divided into a board A 42 and a board B 43, and these are placed via a flexible board or the like (not shown). By electrically connecting them, an electronic circuit similar to that of the first example is configured.

By adopting the positional relationship shown in FIG. 7 as described above, as in the first example, the electronic camera is placed in a strong magnetic field generated by the stand 200 during the charging operation of the rechargeable battery 19. Since the metal part such as the casing of the rechargeable battery 19 itself housed in the housing chamber 38 exerts a magnetic shielding effect on the part of the substrate B43 located on the left side when viewed from the front of 100, the magnetic field is Board B43
The adverse effects of noise and the like on the electronic circuit configured above are reduced.

Further, in the third example, since the secondary coil 22 is arranged on the back side of the electronic camera 100, the power receiving coil having a large inner diameter can be used in the electronic camera. This is because it is easy to secure a wide and flat surface on the back surface of the electronic camera 100. Since the secondary coil 22 is arranged in such a part, a higher voltage is applied at the same number of turns. The secondary coil 22 having a large inner diameter that can generate an electromotive force can be used in the electronic camera 100.

The stand 200 capable of charging the rechargeable battery 19 housed in the electronic camera 100 having the internal structure of the third example shown in FIG.
The electronic camera 10 having the structure shown in FIG.
0 may be mounted vertically with its back surface in contact with the front surface of the stand 200. In this mounted state, it is difficult to see the image displayed on the LCD display 14 of the electronic camera 100, but the rechargeable battery 19 can be charged.

In addition, the present invention is not limited to the above-described embodiment, and various improvements and changes can be made. For example, a material having a high magnetic permeability such as ferrite may be arranged at the center of the primary coil 29 or the secondary coil 22,
From the stand 200 to the electronic camera 1 by the electromagnetic induction action.
You may make it aim at reduction of the loss of the electric power supplied to 00.

[0070]

As described in detail above, in the electronic camera according to the present invention, the structure is such that when the secondary battery is housed inside the outer casing, the power receiving coil is the secondary battery and the outer casing. By arranging the secondary battery so that it is placed at a position between the secondary battery and the power receiving coil, the magnetic field is weakened in the space on the opposite side of the power receiving coil across the secondary battery. It is possible to reduce the effect of the magnetic field generated by the charging device on the electronic circuit inside the electronic camera without providing a shield metal plate or the like to increase the volume and weight of the electronic camera. .

[Brief description of drawings]

FIG. 1 is a diagram showing an electrical configuration of an electronic camera system embodying the present invention.

FIG. 2 is an external view of the electronic camera shown in FIG.

3 is a diagram showing a first example of a main internal structure of the electronic camera shown in FIG.

4 is a diagram showing an example of a structure of a stand used for the electronic camera shown in FIG.

5 is a diagram showing a second example of the main internal structure of the electronic camera shown in FIG.

6 is a diagram showing an example of a structure of a stand used for the electronic camera shown in FIG.

7 is a diagram showing a third example of the main internal structure of the electronic camera shown in FIG.

[Explanation of symbols]

1 CPU 2 Shooting lens 3 image sensor 4 Imaging processing unit 5 DRAM 6 Image processing unit 7 Flash memory 8 memory cards 9a, 9b USB I / F 10a, 10b USB terminal 11 SIF driver 12a, 12b light receiving and emitting section 13 LCD driver 14 LCD display 15 Self LED 16 Operation instruction section 17 Remote control receiver 18 power supply 19 rechargeable battery 20 DC input terminal 21 Charging section 22 Secondary coil 23 Video I / F 24 video output terminals 25 AC / DC converter 26 AC power cord 27 DC power cord 28 Oscillator 29 primary coil 31 Release button 32 Transparent part 33 Strobe 34 mirror frame 35 Battery lid 36 hinges 37 Tripod screw hole 38 storage room 39 substrate 40 Main board 41 Flexible substrate 42 Substrate A 43 Board B 100 electronic camera 200 stand

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02J 7/00 301 H02J 7/00 301D H04N 5/225 H04N 5/225 F // H04N 101: 00 101: 00 F term (reference) 2H100 CC07 DD13 2H102 AA62 CA02 5C022 AA13 AB20 AB40 AC03 AC32 AC42 AC73 5G003 AA01 BA01 FA01 GB08 5H030 AA01 AS00 BB09

Claims (10)

[Claims] 1. An electronic camera for charging a secondary battery, which is a power source, by using electromotive force generated by an electromagnetic induction effect of a magnetic field generated by a charging device, wherein the electronic camera accommodates the secondary battery inside. An external housing of the camera, and a power receiving coil that generates electromotive force by a magnetic field generated by the charging device, the power receiving coil being inside the external housing, and the secondary battery being the external housing. An electronic camera, which is arranged at a position between the exterior housing and the secondary battery when housed inside the body. 2. The power receiving coil is arranged at a position where the power receiving coil is covered by the secondary battery when the secondary battery is housed inside the exterior housing. Item 1. The electronic camera according to Item 1. 3. The power receiving coil includes a substrate to which an electronic circuit component provided in the electronic camera is fixed and the power receiving coil when the secondary battery is housed inside the exterior housing. The electronic camera according to claim 1, wherein the secondary battery is arranged at a position between which the secondary battery is located. 4. The power receiving coil is arranged along a portion of the exterior housing, which is a front surface of the electronic camera, according to any one of claims 1 to 3. Electronic camera. 5. The electronic camera according to claim 4, wherein the power receiving coil is arranged in a portion of the exterior housing that is located on the left side of the electronic camera when viewed from the front of the electronic camera. 6. The power receiving coil is arranged along a portion of the exterior housing, which is a left side surface of the electronic camera, according to any one of claims 1 to 3. Electronic camera. 7. The power receiving coil is arranged along a portion of the exterior housing, which is a back surface of the electronic camera, according to any one of claims 1 to 3. Electronic camera. 8. The electronic camera according to claim 7, wherein the power receiving coil is arranged in a portion of the exterior housing that is located to the left of the front of the electronic camera when viewed from the front. 9. The electronic camera according to claim 1, further comprising display means inside the power receiving coil. 10. A charging device for generating a magnetic field for generating an electromotive force for charging a secondary battery, which is used as a power source of an electronic camera, by an electromagnetic induction action, comprising a power transmission coil for generating the magnetic field. The electronic camera includes an outer casing of the electronic camera that houses the secondary battery therein, and a power receiving coil that generates an electromotive force by the magnetic field, and the power receiving coil is the outer casing. Charging characterized by being arranged inside the body at a position between the external housing and the secondary battery when the secondary battery is housed inside the external housing. apparatus.