JP2014236468A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that enables stable radio communication and is excellent in electric performance such as the shielding effect of an electromagnetic wave and the prevention of erroneous operation due to static electricity.SOLUTION: A digital single-lens reflex camera, which is an example of an electronic apparatus, comprises: a body part 100 including a top surface exterior cover 101; a radio device including an antenna part 42 placed under the top surface exterior cover 101 of the body part 100 in order to perform radio communication; and a first loop for a strap 54a protruding toward the outside from the body part 100. The first loop for a strap 54a is provided at a position away from a grip part 119 grabbed by a user in order to operate the body part 100, the antenna part 42 is arranged in the vicinity of the first loop for a strap 54a, and at least the periphery of the antenna part 42 of the top surface exterior cover 101 is made a dielectric region.

Description

  The present invention relates to an electronic apparatus having a built-in wireless communication device, and more particularly, to a fixing method of the wireless communication device and an arrangement configuration of an exterior member, a metal member, and the like around the wireless communication device.

  In recent years, it has been desired to mount wireless communication means such as a wireless LAN on a portable imaging device such as a digital camera. When the wireless communication means is mounted on the imaging device, the location of the antenna is a problem in order to ensure communication performance. In particular, when the antenna is built in the imaging device, there are various structural restrictions. is there.

  For example, if a metal exists in the communication direction of the antenna, the radio signal of the antenna is blocked and stable communication cannot be performed. Therefore, a member in the communication direction of the antenna needs to be made of a non-metallic material. However, in recent imaging apparatuses, there are an increasing number of cases in which a metal or a conductive resin is used in a casing for the purpose of improving impact resistance and shielding electromagnetic waves. In addition, even in an imaging device using a non-metal casing (for example, a dielectric resin casing) that cannot shield electromagnetic waves, the non-metal casing is subjected to metal plating or metal coating in order to suppress unnecessary radiation. Increasing cases. Therefore, it is necessary to arrange the antenna avoiding these metal materials. In addition, in order to arrange the antenna, a plane area having a certain area is required, and it is difficult to secure an antenna arrangement space in an imaging apparatus that is becoming smaller.

  In view of such circumstances, as a technique for mounting an antenna for performing wireless communication on an imaging apparatus, a configuration in which a member around the antenna is changed from metal to nonmetal has been proposed (see Patent Document 1). In addition, a method of transmitting and receiving radio waves for wireless communication using a window portion of display means such as a liquid crystal display provided in the imaging apparatus has been proposed (see Patent Document 2).

JP 2002-032150 A JP 2009-141770 A

  However, as in the technique described in Patent Document 1, a configuration in which a non-metallic material is used only for a portion where an antenna exists while a large portion of the casing is made of metal increases the number of parts. . In that case, there is a problem that the manufacturing cost increases with the increase in the number of parts, and the assemblability is deteriorated. Further, the use of two kinds of materials reduces the degree of freedom of design of the entire imaging apparatus. There is a fear. In addition, since the portion using the nonmetallic material becomes large, there is a fear that electromagnetic waves cannot be shielded.

  On the other hand, in the method of transmitting and receiving radio waves for wireless communication using the window portion of the display unit as in the technique described in Patent Document 2, the antenna arrangement is restricted, and as a result, the imaging apparatus There are restrictions on the design and layout of various components arranged inside the imaging apparatus.

  The present invention enables stable wireless communication while preventing a reduction in the degree of freedom of design and layout of an electronic device body when a wireless communication device is arranged in the electronic device, and further, electromagnetic wave shielding effect and malfunction due to static electricity. An object of the present invention is to provide an electronic device having excellent electrical performance such as prevention.

  An electronic apparatus according to the present invention includes a main body having an exterior member, wireless means having an antenna portion disposed on the lower side of the exterior member in the main body to perform wireless communication, and the main body to the outside. An electronic device comprising a protruding metal member, wherein the metal member is provided at a position away from a part where a user grips the main body portion in order to operate the main body portion, and the wireless antenna is It is disposed in the vicinity of a metal member, and at least a peripheral region of the antenna portion of the exterior member is a dielectric region.

  According to the present invention, in an electronic device such as an imaging device provided with a wireless communication device, the electrical performance such as the shielding effect of electromagnetic waves and the prevention of malfunction due to static electricity is provided, and the degree of freedom in the design and layout of the electronic device body is reduced. And stable wireless communication is possible.

It is the external appearance perspective view (front perspective view and back perspective view) of the main-body part of the digital single-lens reflex camera which concerns on embodiment of this invention. It is another external perspective view of the main-body part of the digital single-lens reflex camera of FIG. It is a disassembled perspective view of the digital single-lens reflex camera of FIG. It is a schematic block diagram of the digital single-lens reflex camera of FIG. It is a perspective view which shows the main base shown in FIG. 3 independently. It is a top view of the main base shown in FIG. FIG. 2 is a rear view (a plan view seen from the inside) of an upper surface exterior cover that constitutes a main body of the digital single-lens reflex camera of FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, as an example of the electronic apparatus according to the present invention, a digital single-lens reflex camera, which is a kind of imaging apparatus, is taken up.

  FIG. 1 is an external perspective view (a front perspective view and a rear perspective view) of a main body 100 of a digital single-lens reflex camera according to an embodiment of the present invention, and shows a state in which a strobe unit is in a storage position. FIG. 2 is another external perspective view of the main body 100 of the digital single-lens reflex camera of FIG. 1, showing a state where the strobe unit has moved to the light emitting position. FIG. 3 is an exploded perspective view of the digital single-lens reflex camera of FIG.

  As shown in FIG. 3, the main body portion 100 of the digital single-lens reflex camera is configured by attaching an exterior member to a main base 70 that is a main body. The exterior member includes an upper surface exterior cover 101, a front exterior cover 102, a back exterior cover 114, and a side exterior cover 115. However, the configuration is not limited to such a configuration. For example, the front exterior cover 102 and the side exterior cover 115 may be integrated.

  A flash unit 103, a release button 104, an electronic dial 105, an ISO sensitivity setting button 106, a main power switch 107, a shooting mode dial 108, and an accessory shoe 109 are arranged on the upper surface side of the main body 100. A strobe unit drive switch 111 and a lens mount 118 are disposed on the front side of the main body 100, and a color liquid crystal monitor 110 and a viewfinder eyepiece window 112 are disposed on the rear side of the main body 100. A card slot 113 is disposed on one side surface of the main body 100, and an interface connector 116 and a cover 117 for covering the interface connector 116 are provided on the other side surface. In the main base 70, the radio board 41 is disposed on the upper surface on the side where the interface connector 116 is disposed.

  The strobe unit 103 automatically moves from the storage position to the light emission position when the reflected light from the subject (subject light) is weak under the control of the camera microcomputer 10 (see FIG. 4), and the amount of light that automatically obtains the appropriate exposure. Emits light. The strobe unit 103 can be forcibly moved from the storage position to the light emission position by operating the strobe unit drive switch 111. Normally, the strobe unit 103 is held in the storage position shown in FIG. 1 when the power is off.

  The release button 104 is configured as a two-stage switch having a first switch that determines an exposure value for a subject when pressed halfway and performs a shooting preparation operation such as focusing, and a second switch that performs exposure processing on the subject. Has been. Note that a grip part 119 is provided below the release button 104, which is a part that the photographer (user) holds to operate the digital single-lens reflex camera.

  The electronic dial 105 is an operation means for performing settings such as exposure correction. The ISO sensitivity setting button 106 is an operation unit for setting ISO sensitivity conditions. The main power switch 107 switches on / off (ON / OFF) the function of the main body 100. When the main power switch 107 is operated to the on (ON) position, the camera microcomputer 10 starts up the digital single-lens reflex camera from the function stop state to the photographing enabled state according to a predetermined sequence.

  The shooting mode dial 108 is an operation means for switching a shooting mode (auto mode, landscape mode, portrait mode, night view mode, flower mode, etc.). For example, a strobe device having a guide number larger than that of the strobe unit 103 can be attached to the accessory shoe 109. A photographing lens barrel (not shown) is attached to the lens mount 118. The color liquid crystal monitor 110 displays pre-shooting information, setting contents, a shot image, and the like. The photographer can confirm the subject through the viewfinder eyepiece window 112 and determine the composition. An external memory such as a compact flash (registered trademark) (CF) card or an SD card for storing image data can be attached to and detached from the card slot 113. The interface connector 116 is used for connection for communication with an external device. The wireless substrate 41 and its peripheral structure will be described later.

  FIG. 4 is a schematic block diagram of a digital single lens reflex camera. The digital single lens reflex camera includes a camera microcomputer 10, a strobe control circuit 11, an operation detection circuit 12, a photographing condition control circuit 13, a motor control circuit 14, an image sensor driving circuit 15, a data processing circuit 16, a storage processing circuit 17, and a reproduction processing circuit. 18 and a radio control circuit 19.

  When the operation detection circuit 12 detects operations on various operation members, the camera microcomputer 10 performs settings corresponding to the detected operations. For example, when the shooting mode dial 108 is operated to select a shooting mode, the camera microcomputer 10 sets a program diagram that determines a combination of shutter speed and aperture corresponding to the selected shooting mode. The camera microcomputer 10 sets exposure correction and the like when the electronic dial 105 is operated, and sets ISO sensitivity conditions when the ISO sensitivity setting button 106 is operated.

  A series of shooting operations when the auto mode is selected with the shooting mode dial 108 will be described below. When the operation detection circuit 12 detects that the release button 104 has been half-pressed, the camera microcomputer 10 drives the shooting condition control circuit 13 to determine an appropriate shutter speed and aperture value. The subject light is measured by a photometric sensor (not shown) arranged in the vicinity of 112. If the camera microcomputer 10 determines from the obtained photometric result that the subject light is lower than the predetermined luminance, the camera microcomputer 10 controls the motor control circuit 14 to drive the motor that moves the strobe unit 103 from the storage position to the light emission position. . As a result, the strobe unit 103 shifts from the state shown in FIG. 1 to the state shown in FIG.

  Subsequently, when the operation detection circuit 12 detects that the release button 104 is fully pressed, the camera microcomputer 10 drives the strobe control circuit 11 so that the subject light reaches the image sensor (not shown). The light is emitted at a predetermined timing. The camera microcomputer 10 performs strobe light emission, opens a shutter (not shown), and irradiates the image sensor with subject light for a predetermined time to perform exposure. The camera microcomputer 10 closes the shutter after the exposure time has elapsed. The image sensor converts the subject light into an analog electrical signal by photoelectric conversion and outputs the analog electrical signal to the data processing circuit 16. The data processing circuit 16 performs predetermined amplification processing or the like on the analog electrical signal, converts the analog electrical signal into a digital signal, and further performs various correction processing to generate image data. The camera microcomputer 10 stores the image data obtained by the data processing circuit 16 in an external memory mounted in the card slot 113 by driving the storage processing circuit 17. Thus, a series of photographing operations is completed.

  When the photographer operates an image reproduction button (not shown), the camera microcomputer 10 drives the reproduction processing circuit 18 to display the photographed image stored in the external memory on the back side of the main body 100. It is displayed on the monitor 110. In addition, the photographer uses the wireless function of the wireless device described below to the external device (for example, a personal computer or a cloud computer) image data of the image confirmed on the color LCD monitor 110 or the image data stored in the external memory. Can be sent. In that case, the photographer selects a wireless function from a menu screen displayed on the color liquid crystal monitor 110. Then, the camera microcomputer 10 drives the wireless control circuit 19, establishes a communication state in accordance with a predetermined wireless standard, and transmits image data.

  Note that the data to be transmitted is not limited to image data, and there is no limitation as long as it is data that can be transmitted (for example, shooting condition data, shooting position GPS data, audio data, etc. accompanying the image data). Moreover, reception of image data etc. can be performed similarly to transmission. That is, when the photographer selects a command for receiving image data from the menu screen displayed on the color LCD monitor 110, the camera microcomputer 10 drives the wireless control circuit 19 to establish a communication state in accordance with a predetermined wireless standard. To do. As a result, the image data can be received, and the received image data is stored in the external memory.

  FIG. 5 is a perspective view showing the main base 70 shown in FIG. 3 alone. In the XYZ orthogonal coordinate system shown in FIG. 5, the X axis is parallel to the width direction of the main base 70, the Y axis is parallel to the height direction, and the Z axis is parallel to the optical axis.

  The main base 70 is a main body (skeleton) of the main body 100. The subject image is provided to the photographer through the finder eyepiece window 112 by the pentaprism 51 provided on the main base 70 and the mirror 52 fixed so as to be rotatable with respect to the mirror box 73. The main base 70 has a battery chamber 71 for storing batteries.

  A wireless device that performs wireless communication with an external device is generally configured by an antenna unit 42, a communication circuit unit 43 including a wireless control circuit 19, and a wireless substrate 41 on which these components are mounted. The part 119 is arranged on the opposite side across the optical axis in the X direction. When the wireless device is arranged in the vicinity of the grip unit 119, when the photographer holds the grip unit 119, the photographer's hand is present in the vicinity of the wireless device. This will adversely affect the transmission and reception of radio waves. In order to prevent this, the wireless device is arranged at a position away from the grip portion 119.

  The antenna unit 42 may be a circuit pattern printed on the wireless substrate 41 or a chip antenna made of an electrical component. In the present embodiment, the antenna unit 42 and the communication circuit unit 43 are arranged on the same radio board 41, but the radio apparatus is not limited to such a configuration. For example, the antenna unit 42 only needs to satisfy an arrangement condition to be described later, and the communication circuit unit 43 may be mounted on another substrate or arranged at a different location.

  The wireless board 41 is fixed to the main base 70 by fixing screws 45a and 45b. The wireless board 41 is connected to the main board 55 for electrically controlling the operation of the main body 100 by the flexible printed board 50. Operation control of the communication circuit unit 43 on the wireless board 41 is performed through the camera microcomputer 10 and the wireless control circuit 19 on the main board 55.

  The main base 70 includes a first ear ring 54a and a second metal which are first metal members protruding from the main body 100 in order for a photographer of a digital single lens reflex camera to attach a camera accessory such as a strap (not shown). A second ear ring 54b, which is a member, is provided. The first ear ring 54a and the second ear ring 54b are made of a metal material such as stainless steel. The first ear ring 54a is fastened and fixed to the main base 70 via a metal plate (not shown) by screws 72a and 72b, and this metal plate is electrically connected to the ground of the main body 100. . The first ear ring 54a is provided with a screw 63 that fits into a screw seat 80 (see FIG. 7) provided on the upper surface outer cover 101.

  FIG. 6 is a top view of the main base 70 and shows the positional relationship between the antenna portion 42 of the wireless board 41 and the first ear ring 54a. If metal parts are present around the antenna unit 42, a desired frequency cannot be obtained with respect to the resonance frequency of the antenna, and the radiated or received radio wave is disturbed, so that wireless communication with the outside is normally performed. It becomes impossible to do. Therefore, in the present embodiment, the antenna unit 42 and the first ear ring 54a do not overlap each other in the X direction and the Z direction (the direction of at least two axes of the orthogonal coordinate system) of the main base 70 (main body unit 100). Is arranged. Thus, the first ear ring 54a made of a metal material does not adversely affect the radio wave radiated from or received from the antenna unit 42 during wireless communication, and thus the communication performance can be prevented from being deteriorated.

  As described above, the radio board 41 is grounded at a position away from the antenna unit 42 by fastening and fixing the radio board 41 to a metal plate (not shown) with the screws 45a. Further, the metal plate (not shown) and the first ear ring 54a are electrically connected by screws 72a and 72b, whereby the ground of the wireless board 41 and the first ear ring 54a are electrically connected. As a result, the ground performance of the radio board 41 can be ensured, and at the same time, the screw 45a disposed in the vicinity of the antenna unit 42 does not affect the resonance frequency of the antenna unit 42, so that the transmission and reception of radio waves are disturbed. Can be avoided.

  FIG. 7 is a rear view of the upper surface exterior cover 101 (a plan view viewed from the main base 70 side). The top exterior cover 101 and the front exterior cover 102 are divided in the vicinity of the first ear ring 54a. At this time, the antenna portion 42 of the wireless board 41 is covered by the top exterior cover 101 on the subject side and the top surface side. It is in a state.

  Here, the front exterior cover 102 is molded from a conductive resin, while the upper exterior cover 101 is molded from a dielectric resin. In FIG. 7, a region A indicated by hatching on the inner side surface of the top exterior cover 101 is a conductive region where a conductive film (conductive coating film) is provided by conductive coating, while cross-hatching is performed. The region B shown is a dielectric region where no conductive coating is applied. The conductive coating is performed by coating a conductive resin to form a conductive film, or by forming a metal film by a vapor deposition method or the like, but the forming method is not particularly limited.

  When the antenna portion 42 of the wireless substrate 41 and the vicinity thereof are covered with a conductive material (conductive component), radio waves transmitted / received during wireless communication are shielded and communication is disabled. That is, the area A where the conductive film is formed on the top surface exterior cover 101 is an area that does not cover the antenna portion 42 of the wireless substrate 41. Further, a conductive film is formed up to the screw seat 80 so as to avoid the periphery of the antenna portion 42, and the screw seat 80 is included in this region A. Therefore, the first ear ring 54 a is electrically connected to the upper surface outer cover 101 by fitting the screw seat 80 with the screw 63 provided on the first ear ring 54 a.

  Further, the first ear ring 54a is fastened and fixed to the main base 70 by screws 72a and 72b via a metal plate (not shown). Therefore, the upper surface outer cover 101 is electrically connected to the ground of the main body 100 (main base 70) via the first ear ring 54a and a metal plate (not shown). In this way, the configuration in which the upper surface exterior cover 101 is securely connected to the ground of the main body 100 can satisfy the electrical performance such as the shielding effect of electromagnetic waves and the prevention of malfunction due to static electricity. At this time, since it is not necessary to change the shape of the upper surface outer cover 101 from the conventional one, the size of the digital single-lens reflex camera is not increased. Therefore, the design freedom of the digital single-lens reflex camera is not lowered.

  As described above, according to the present embodiment, no metal material is disposed around the antenna unit 42 of the wireless device. Therefore, it is possible to prevent deterioration in communication performance and enable stable wireless communication. The upper surface exterior cover 101 that covers the wireless device is securely connected to the ground of the main body 100 while preventing the conductive material from being disposed around the antenna section 42. As a result, it is possible to satisfy electrical performance such as an electromagnetic wave shielding effect and prevention of malfunction due to static electricity. Further, it is not necessary to increase the size of the upper surface outer cover 101, and therefore, the degree of freedom in designing a digital single-lens reflex camera is not lowered.

<Other embodiments>
Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. The present invention is not limited to a digital single-lens reflex camera, and is applied to various mobile terminals such as a compact digital camera, a digital video camera, a mobile phone, a smartphone, a portable game machine, a tablet computer, and a notebook computer. can do.

41 Wireless board 42 Antenna part 43 Communication circuit part 54a First ear ring 55 Main board 63 Screw 70 Main base (main body)
72a, 72b Screws 80 Screw seats 100 Main body part 101 Upper surface exterior cover 119 Grip part

Claims (7)

An electronic device comprising: a main body portion having an exterior member; wireless means having an antenna portion disposed below the exterior member in the main body portion for performing wireless communication; and a metal member protruding outward from the main body portion. Equipment,
The metal member is provided at a position away from a part where a user grips the main body part for operating the main body part, and the antenna part is disposed in the vicinity of the metal member,
An electronic apparatus, wherein at least a periphery of the antenna portion of the exterior member is a dielectric region. The exterior member has conductivity except for the dielectric region,
The electronic apparatus according to claim 1, wherein the metal member is electrically connected to the conductive region. The electrically conductive region of the exterior member and the metal member are electrically connected by a screw and a screw seat that fit together,
The electronic device according to claim 2, wherein the metal member is covered with the exterior member in the main body portion and fastened via a metal plate to a main body connected to a ground.   The electronic apparatus according to claim 3, wherein the wireless unit includes a substrate on which the antenna is mounted, and the substrate is connected to a ground by being fastened to the metal plate.   The said exterior member consists of dielectric resin, and the electroconductive film is formed in the area | region except the said dielectric area | region in the inner surface of the said exterior member. Electronic equipment.   The said exterior member WHEREIN: The said dielectric region is formed with dielectric resin, and the area | region except the said dielectric region is formed with the conductive resin or the metal, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Electronic equipment.   The electron according to any one of claims 1 to 6, wherein the antenna portion and the metal member do not overlap in at least two axes of an orthogonal coordinate system set with respect to the main body portion. machine.

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