JP2012123136A - Electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress image quality degradation derived from shake of an imaging device caused by vibration occurring from a main capacitor in performing flash photography with an electronic camera having a built-in flash device.SOLUTION: An electronic camera 100 is equipped with a flash device. The electronic camera 100 comprises: a body mount 110 provided in a front part of a camera main body for removably mounting a photographic lens thereon; a mount holding part 200 for holding the body mount 110; an imaging device 214; an exterior member 102 for covering at least a front face of the camera main body; and a main capacitor 150 for temporarily storing emission energy for the flash device. The main capacitor 150 is disposed in a space surrounded by the imaging device 214, the body mount 110 and the external member 102 on a non-grip side on the right hand side of an optical axis of the photographic lens when the electronic camera 100 held in a horizontal position is seen from a subject side, and is fixed on the mount holding part 200.

Description

  The present invention relates to an electronic camera, and more particularly to an electronic camera capable of flash photography using a built-in flash device.

  2. Description of the Related Art A single-lens reflex electronic camera (hereinafter simply referred to as a single-lens reflex electronic camera) with an interchangeable taking lens includes a focal plane shutter for mechanically controlling the operation of starting and ending exposure of an image sensor. A single-lens reflex electronic camera includes a mirror box between a photographing lens and an image sensor. During the shooting preparation operation (when the photographer is looking through the viewfinder to determine the composition), the reflex mirror in the mirror box blocks the optical path of the subject light emitted from the shooting lens and directed to the image sensor. In position. Subject light is reflected by a reflex mirror and guided to an optical viewfinder. During the exposure operation, the reflex mirror is temporarily moved to the retracted position, and subject light is guided to the image sensor.

  Patent Document 1 discloses a single-lens reflex electronic camera incorporating a flash device. A motor as a driving source for driving the reflex mirror and charging a shutter blade driving spring in the focal plane shutter is disposed on the side of the mirror box.

  In addition, the flash device incorporated in the single-lens reflex electronic camera disclosed in Patent Document 1 boosts the power supply voltage to a high voltage when storing a charge in the main capacitor and a main capacitor that temporarily stores light emission energy. An optical system for irradiating a desired irradiation range by reflecting and condensing light from a xenon tube that emits flash light and a xenon tube that controls the light emission timing and light emission amount of the flash device. A light emitting unit. In the single-lens reflex electronic camera disclosed in Patent Document 1, the main capacitor is housed in the grip portion.

  Different from the single-lens reflex electronic camera described above, there is a camera that has a function of replacing a taking lens and omits a mirror box and an optical viewfinder in order to further reduce the size and weight of the camera body. . This camera is called a mirrorless camera. In a mirrorless system camera, it is generally required to reduce the size of the camera body as much as possible. Patent Document 2 discloses a mirrorless camera incorporating a flash device. This camera includes a body mount to which a photographing lens can be attached and a CMOS image sensor. In a state where the camera is in the horizontal shooting posture (lateral posture), the main capacitor is disposed above the CMOS image sensor and closer to the CMOS image sensor than the body mount.

  Incidentally, it is known that a capacitor vibrates during its charge / discharge operation. In Patent Document 3, a circuit board on which a power supply circuit including an electrolytic capacitor is mounted is made of synthetic resin foam in order to eliminate or reduce mechanical noise caused by charging / discharging of the electrolytic capacitor mounted on a circuit board of an electronic device. Techniques for covering with a body layer are disclosed.

  Patent Document 4 discloses a method for suppressing ringing caused by a piezoelectric phenomenon in a ceramic capacitor that is periodically charged and discharged. In the technique disclosed in Patent Document 4, when the voltage between the terminals of the ceramic capacitor drops to a predetermined voltage value v2 during the discharge period, control for charging the ceramic capacitor so as to maintain the predetermined voltage value until the next charging period is performed. Done.

JP 2009-33718 A JP 2010-93789 A JP-A-11-102190 JP 2010-135623 A

  In the camera disclosed in Patent Document 1, since the grip portion is provided so that the camera can be stably held, the inside of the grip portion can be used as a storage space for the main capacitor. However, in the mirrorless type camera, the grip portion may be reduced or eliminated for the purpose of reducing the size and weight of the camera body.

  In such a case, it is necessary to newly provide an arrangement space for the main capacitor. In addition, the present inventors have found that when the distance between the image sensor and the main capacitor becomes shorter as the camera becomes smaller, the following problems may occur. That is image blurring caused by the vibration of the main capacitor during flash photography.

  During flash photography, the main capacitor itself vibrates as a relatively large amount of charge accumulated in the main capacitor is released all at once. Due to this vibration, members inside the camera resonate and the like, and the amplitude of the vibration is amplified and transmitted to the image sensor during the exposure operation. As a result, the image sensor shakes to cause a phenomenon similar to camera shake, and the sharpness of the generated image may decrease.

  When the field luminance is relatively low and most of the illumination light component that illuminates the subject at the time of shooting is caused by flash light, the flash light emitted from a general flash device has a long emission time of 1 at most. Since it is about milliseconds, there is little influence on the image by the vibration of the main capacitor. However, when photographing a subject illuminated with flash light and steady light, ie, so-called mixed light photography, the image of the subject illuminated with steady light may be blurred. In addition, the subject image illuminated by the steady light and the subject image illuminated by the flash light may be misaligned, which may make the image unsightly. In addition, even when shooting with flashlight as the main illumination light source, if a point-like light source such as a streetlight is reflected in the background, an image in which these images blur and have a tail may be formed. is there.

  The above-described problem is a new problem that has not been recognized by a camera that has a sufficient distance between the imaging element and the main capacitor, such as a camera in which the main capacitor can be disposed in the grip portion. None of the above-mentioned Patent Documents 1 to 4 describes the occurrence of such a problem.

  The present invention has been made in view of the above problems. In an electronic camera with a built-in flash device, the camera body can be miniaturized, and the image pickup device is shaken by vibration generated from the main capacitor during flash photography, resulting in a reduction in image quality. It aims at providing the technology which can suppress this.

(1) The first aspect of the present invention is:
An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount;
An image sensor that converts a subject image formed by the photographing lens into an image signal;
An exterior member covering at least the front surface of the camera body;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. And is fixed to the mount holding portion.
(2) The second aspect of the present invention is:
An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount;
An image sensor that converts a subject image formed by the photographing lens into an image signal, the image sensor including a switching element that can electrically control the start and end of an exposure operation;
An optical element disposed behind the body mount and in front of the imaging element;
An exterior member covering at least the front surface of the camera body;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. And is fixed to the back side of the portion of the mount holding portion to which the body mount is fixed.
(3) The third aspect of the present invention is:
An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount, the mount holding portion including a rearward extending portion extending from the portion holding the body mount to the back side;
An image sensor that converts a subject image formed by the photographing lens into an image signal, the image sensor including a switching element that can electrically control the start and end of an exposure operation;
An exterior member covering at least the front surface of the camera body;
The image sensor is disposed behind the image sensor and supports the image sensor movably along a plane perpendicular to the optical axis of the photographing lens, and the camera shake is generated on the image sensor in accordance with the detected camera shake. A camera shake correction unit that corrects the camera shake by moving the image sensor in a direction to reduce blur of the subject image;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. And is fixed to the back side of the portion of the mount holding portion to which the body mount is fixed,
The camera shake correction unit is fixed to the rearward extension portion.

  According to the present invention, in a flash device built-in type electronic camera, it is possible to reduce the size of the camera body, and it is possible to suppress the image pickup device from being shaken by the vibration generated from the main capacitor during flash photography, and the deterioration of image quality.

FIG. 5 is a five-side view illustrating a front surface, an upper surface, a left side surface, a right side surface, and a lower surface of the electronic camera. It is a figure which shows the back surface of an electronic camera. It is a cross-sectional view which shows the II-II cross section of the front view shown in FIG. 1 of an electronic camera. It is a longitudinal cross-sectional view which shows the III-III cross section of the front view shown in FIG. 1 of an electronic camera. It is a cross-sectional view which shows the IV-IV cross section of the front view shown in FIG. 1 of an electronic camera. It is a longitudinal cross-sectional view which shows the VV cross section of the front view shown in FIG. 1 of an electronic camera. It is a figure which shows a mode that the front cover was seen from the back side. It is a disassembled perspective view which shows the structure of the principal part of an electronic camera. It is a systematic diagram explaining the mechanical connection relationship between the main components of an electronic camera. It is a figure explaining another example at the time of fixing a main capacitor | condenser to a mount holding part, and is a figure which shows the cross section equivalent to the IV-IV cross section of the front view shown in FIG. FIG. 10 is an exploded perspective view showing the main capacitor fixing structure shown in FIG. 9. It is a figure explaining the example which fixes a main capacitor | condenser to the inner corner part in the non-grip side of a front cover, and is a figure which shows the cross-sectional view equivalent to the IV-IV cross section of the front view shown in FIG.

  1A and 1B are diagrams schematically illustrating the appearance of an electronic camera 100 according to an embodiment of the present invention. FIG. 1A includes front, top, bottom, right side, and left side views. A five-sided view is shown. FIG. 1B shows a rear view. That is, a hexahedral view is formed by FIGS. 1A and 1B.

  Hereinafter, for the purpose of facilitating understanding when describing the arrangement of components of the electronic camera 100, an image generated by the electronic camera 100 will be described as having a horizontally long aspect ratio. The photographing posture of the electronic camera 100 that obtains a horizontally long image is referred to as a horizontal position, and the photographing posture that obtains a vertically long image is referred to as a vertical position.

  In FIG. 1A, the front view of the electronic camera 100 in the horizontal position is shown in the center of the five views, and the top view, the bottom view, the left side view, A right side view is drawn. In the front view, the X axis is drawn in the horizontal direction along the plane of FIG. 1A, and the Y axis is drawn in the vertical direction. In the front view in FIG. 1A, these X-axis and Y-axis are based on the position through which the optical axis of the photographic lens attached to the electronic camera 100 (hereinafter, the optical axis of the photographic lens is simply referred to as the optical axis). Assume that the coordinate systems are orthogonal to each other. That is, the position (X, Y) = (0, 0) is the position through which the optical axis passes. In addition, when the same kind of component is illustrated in FIG. 1A, a lead line and a reference numeral are attached to any one of the same kind of components for the purpose of making the drawing easier to see.

  In this specification, when the electronic camera 100 in the horizontal position is viewed from the subject side, the side toward the left of the Y axis is referred to as a grip side, and the side toward the right is referred to as an anti-grip side. Further, as shown in the right side view, with the X axis as a reference, the upward side is referred to as the upper side, and the downward side is referred to as the lower side. Furthermore, as shown in the top view, the direction approaching the subject is referred to as the front, and the direction away from the subject is referred to as the rear. A direction parallel to the X axis is referred to as an X axis direction, and a direction parallel to the Y axis is referred to as a Y axis direction. In addition, when describing the orientation of the surfaces of the electronic camera 100 and its components, the surface facing the subject side is the front side and the opposite direction when the electronic camera 100 is oriented toward the subject in the horizontal position. The surface facing upward is referred to as the upper surface, the surface facing downward as the lower surface, the surface facing left as the left side, and the surface facing right as the right side.

  In the present embodiment, it is assumed that the electronic camera 100 is a photographic lens interchangeable mirrorless camera. The main body of the electronic camera 100 is covered with a front cover 102 and a rear cover 104. A release button 106 is provided on the upper surface of the electronic camera 100 on the grip side. Further, a flash light emitting unit 152 is provided on the front upper side on the anti-grip side, and an AF auxiliary light source 108 is provided on the upper front side on the grip side. The flash light emitting unit 152 emits a flash as necessary to illuminate the subject during still image shooting. The AF auxiliary light source 108 is configured to be able to irradiate auxiliary light toward the subject when the subject brightness is low and it is difficult to obtain sufficient focus adjustment accuracy.

  The electronic camera 100 includes a mount 110 for detachably mounting a photographic lens. Hereinafter, the mount 110 is referred to as a body mount in order to distinguish it from the mount on the photographing lens side. The body mount 110 has an annular shape centering on the position where the optical axis passes, and is fixed to the mount holding part 200 with a plurality of screws 112. The body mount 110 is preferably formed of a material having relatively high strength and rigidity, such as a metal such as stainless steel or brass, or a thermoplastic resin reinforced with glass fiber or carbon fiber. By forming the body mount 110 from a material having a relatively high rigidity, it is possible to increase the rigidity of the mount holding part 200 itself fastened by the body mount 110 and the screw 112.

  On the back side (back side) of the surface to which the body mount 110 is attached of the mount holding part 200, a rear extension part 200a extending rearward is provided. In FIG. 1A, the rearward extending portion 200a is indicated by a broken line and is depicted as having a rectangular cross section. That is, the rearward extension 200a is drawn as a plurality of protrusions having a quadrangular prism shape. However, the shape of the rear extension 200a may be a columnar shape as necessary, or a combination of protrusions having different shapes. Alternatively, the rear extension part 200a may have a plate-like or box-like structure instead of a plurality of columnar ones standing upright. The mount holding unit 200 functions as a frame that maintains a positional relationship and a dimensional relationship between the body mount 110 and an optical element and an imaging element described later with high accuracy. The mount holding part 200 can be formed by injection molding using a thermoplastic resin reinforced with glass fiber or carbon fiber. Alternatively, it can be formed by casting using an aluminum alloy, a magnesium alloy, a zinc alloy, or the like.

  On the non-grip side, the front cover 102 and the mount holding part 200 are fixed by two screws 116. If the front cover 102 is formed by, for example, pressing a stainless steel plate or an aluminum alloy plate, or by casting using an aluminum alloy, a magnesium alloy, or the like, the front cover 102 and the mount holding portion 200 are screws 116. Therefore, the rigidity of the mount holding part 200 can be increased.

  When the front cover 102 and the mount holding part 200 are both formed by injection molding using a thermoplastic resin or die casting or thixo molding using a casting alloy, the front cover 102 and the mount holding part 200 are integrally formed. May be. In that case, the screw 116 becomes unnecessary.

  A plurality of signal contacts 118 are arranged on the inner side of the opening of the body mount 110 below the mount holding part 200. The taking lens and the electronic camera 100 are electrically connected via a signal contact 118. Electric power is supplied from the electronic camera 100 via the signal contact 118 to the control unit, aperture actuator, and focus adjustment actuator provided in the photographing lens. Then, communication is performed between the electronic camera 100 and the photographing lens, information is exchanged between the two, and an aperture control signal and a focus control signal are output from the electronic camera 100 to the photographing lens. The photographing lens adjusts the aperture of the aperture based on the aperture control signal received from the electronic camera 100, and similarly drives the focus adjustment lens based on the focus control signal received from the electronic camera 100.

  A main capacitor 150 for temporarily storing energy used when flashing from the flash light emitting unit 152 is disposed at a position behind the body mount 110 on the side opposite to the grip of the electronic camera 100 (back side). The main capacitor 150 has a cylindrical shape, and is disposed below the flash light emitting unit 152 such that its cylindrical axis extends in the vertical direction (a direction parallel to the Y axis).

  A release button 106 is provided on the upper surface of the electronic camera 100 on the grip side. In the embodiment of the present invention, the electronic camera 100 is described as being provided with one release button 106, but a plurality of release buttons may be provided. In that case, a release button corresponding to the shooting function may be provided, such as for starting still image shooting or for starting moving image shooting, and each of the buttons can be easily operated according to the shooting posture of the horizontal position and the vertical position. A release button may be provided at the position.

  A battery chamber 122 is provided on the grip side of the electronic camera 100, more specifically on the grip side of the mount holding part 200. A dry battery or a rechargeable battery is mounted in the battery chamber 122. A lid 132 configured to be openable and closable by a user is provided at the bottom of the electronic camera 100, and the battery can be loaded by opening the lid 132. Further, the memory card for recording the image data generated by photographing with the electronic camera 100 is also configured to be able to be inserted and removed by opening the lid 132.

  As shown in the left side view, an external connector 126 and a control printed board 124 are disposed behind the battery chamber 122 on the grip side of the electronic camera 100. The external connector 126 conforms to a standard such as USB or HDMI (registered trademark), and is connected with a cable when image data or audio data is exchanged with an external device. The control printed board 124 controls the operation of the image processing unit that performs processing for generating, displaying, and recording image data based on the image signal output from the image sensor and the electronic camera 100 as a whole. A controller is implemented.

  A tripod attachment 130 is provided at the bottom of the electronic camera 100. A screw hole for screwing a tripod screw is formed in the tripod attachment part 130. In electronic camera 100 according to the present embodiment, the center of this screw hole is provided in the vicinity of the position through which the optical axis passes.

  With reference to FIG. 1B, components provided on the back surface of the electronic camera 100 will be described. An operation member 128 is provided on the grip side of the back surface of the electronic camera 100. The operation member 128 can be of various types such as a dial, a seesaw switch, and a slide switch, in addition to the push button switch type.

  A display device 300 is provided on the back surface of the electronic camera 100. The display device 300 includes a TFT color liquid crystal display panel and a backlight device, and is configured to display moving images, still images, character information, icons, and the like. Alternatively, a self-luminous display panel such as a color organic EL display element may be provided. In addition, a touch panel may be provided on the surface of the display device 300, and the operation member 128 may be configured by the touch panel and a GUI (graphical user interface) displayed on the display device 300.

  An electronic viewfinder 302 is provided above the display device 300. It is desirable to provide the electronic viewfinder 302 so that the optical axis of the observation optical system constituting the electronic viewfinder 302 is substantially coincident with the optical axis of the photographing lens.

  FIG. 2 is a cross-sectional view showing a cross section taken along the line II-II of FIG. A camera shake correction unit 220 is disposed behind the body mount 110 and the mount holding unit 200 that holds the body mount. As described in detail later, the camera shake correction unit 220 is fixed to the rear extension 200a of the mount holding unit 200.

  The image sensor 214 and the optical holding member 210 are fixed to a holding member 216 that is held by the camera shake correction unit 220 so as to be movable along the X-axis direction and the Y-axis direction. The holding member 216 also has a function as a heat radiating plate that absorbs and emits heat generated from the image sensor 214. The imaging element 214 is electrically connected to the imaging substrate 218 on the back surface of the holding member 216 (the surface opposite to the surface on which the imaging element 214 is mounted). The imaging substrate 218 is also fixed to the back surface of the holding member 216. The imaging board 218 and the control printed board 124 are electrically connected by a flexible printed board (FPC) 208.

  The optical holding member 210 is fixed on the holding member 216 on the surface on which the image sensor 214 is mounted. The optical holding member 210 is a frame body that is formed so as to surround a light beam that travels from the photographing lens toward the light receiving surface of the imaging element 214, and an optical low-pass filter (OLPF) 212 is disposed inside the optical holding member 210. The On the surface of the OLPF 212, a layer having a characteristic of cutting light in the infrared wavelength band can be formed as necessary. Alternatively, an infrared cut filter may be disposed inside the optical holding member 210 separately from the OLPF 212. A diaphragm 206 formed of a transparent substrate such as a glass material is disposed on the surface of the optical holding member 210 located on the subject side. The OLPF 212 and the image sensor 214 are sealed by the diaphragm 206, the optical holding member 210, and the holding member 216, and dust is prevented from entering the inside. The vibration plate 206 is vibrated by a vibration mechanism (not shown) when the electronic camera 100 is turned on or at a timing before the power is turned off, and the dust attached to the surface of the vibration plate 206 is splashed and removed.

  As described above, the image sensor 214 and the optical elements such as the OLPF 212 and the diaphragm 206 that are arranged in front of the image sensor 214 are fixed on the holding member 216. Further, as described above, the imaging substrate 218 is fixed on the back side of the holding member 216. When the camera shake correction unit 220 drives the holding member 216 in a plane parallel to the XY plane, the components fixed on the holding member 216 move together.

  The camera shake correction unit 220 includes a camera shake sensor that detects shaking of the electronic camera 100. Based on the signal from the camera shake sensor and the focal length of the photographic lens mounted, the magnitude of image blur occurring on the light receiving surface of the image sensor 214 is calculated. Then, the holding member 216 is driven in the X-axis direction and the Y-axis direction so that the calculated image blur is reduced. At this time, the relative position between the imaging board 218 and the control printed board 124 changes sequentially. In order to cope with the change in the relative position, the connection FPC 208 is provided with a slack portion 208a.

  The camera shake correction unit 220 includes a side extending part 220b, and the holding member 216 is driven in the side extending part 220b along the Y-axis direction (direction orthogonal to the paper surface of FIG. 2). An actuator is built in. As this actuator, an ultrasonic actuator, a stepping motor, a moving coil actuator also called a VCM (voice coil motor), a moving magnet actuator, or the like can be used. The side extending portion 220b extends to a position that covers the back surface of the main capacitor 150 on the non-grip side.

  The main capacitor 150 is bonded and fixed to the mount holding part 200 with a double-sided adhesive tape 222. The double-sided adhesive tape 222 may be a thin one based on paper, non-woven fabric, plastic film or the like, but a thick one based on a foam or the like can be used. When the double-sided adhesive tape 222 is thick, the double-sided adhesive tape 222 can absorb the vibration generated by the main capacitor 150 due to the light emission of the flash device. Conversely, by bonding the thin double-sided pressure-sensitive adhesive tape 222 to the mount holding unit 200, it is possible to suppress the vibration generated by the main capacitor with the rigidity of the mount holding unit 200.

  As shown in FIG. 2, the main capacitor 150 is disposed on the back side of the portion of the mount holding part 200 where the body mount 110 is fixed (the back side behind the body mount mounting surface). In other words, the main capacitor 150 is fixed to a portion that is rigidly connected to the body mount 110 and has increased rigidity.

  As well shown in FIG. 2, the control printed board 124 and the battery chamber 122 are disposed on the grip side with respect to the optical axis. Further, the control printed board 124 is disposed behind the battery chamber 122. In FIG. 2, a state in which the battery B is mounted in the battery chamber 122 is shown. The memory card MC that is detachably attached to the electronic camera 100 is disposed between the battery chamber 122 and the control printed board 124. As described above, the battery B and the memory card MC can be attached and detached by opening the lid 132 provided at the bottom of the electronic camera 100. The arrangement position of the memory card MC may be behind the control printed board 124. Further, as a lid that opens and closes when the memory card MC is attached / detached, a lid other than the lid 132 may be provided.

  FIG. 3 is a longitudinal sectional view showing a cross section taken along the line III-III in FIG. 1, that is, a cross section along a vertical plane including the optical axis. The camera shake correction unit 220 includes a downward extending portion 220a, and an actuator for driving the holding member 216 along the X-axis direction (direction orthogonal to the paper surface of FIG. 3) is provided in the downward extending portion 220a. Built in. This actuator can be the same as the actuator for driving the holding member 216 along the Y-axis direction. The downward extending portion 220a extends further below the lower end portion of the image sensor 214.

  An electronic viewfinder 302 is arranged above the camera shake correction unit 220. The electronic viewfinder 302 includes a small transmissive liquid crystal display unit, a backlight illumination device that illuminates the transmissive liquid crystal display unit from the back side, and an image formed on the liquid crystal display unit by a photographer. And a magnifying optical system for observation. By bringing the eye close to the eyepiece of the electronic viewfinder 302, the photographer can observe a live view image or a reproduced image.

  The tripod attachment part 130 is disposed in front of the downward extension part 220 a of the camera shake correction part 220. The signal contact 118 is disposed above the tripod attachment part 130.

  FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1, that is, a state in which two rearward extending portions 200a are provided on each of the upper side and the lower side. It is a cross-sectional view showing a cross section along a horizontal plane passing through the portion 200a. FIG. 4 shows a state in which the rear extension 200a provided on the lower side of the image sensor 214 is fixed to the lower extension 220a of the camera shake correction unit 220 by the screw 224. As is clear from FIG. 4, the body mount 110, the mount holding portion 200, and the camera shake correction portion 220 are integrated by screw fastening. Further, the front cover 102 is fastened by screws 116 on the front side of the portion where the main capacitor 150 is attached on the opposite side of the mount holding part 200. When the front cover 102 is made of metal, the front cover 102 and the mount holding part 200 are screwed together, whereby the rigidity of the mount holding part 200 can be increased.

  FIG. 5 is a view showing a VV cross section in FIG. 1, that is, a vertical cross section in a portion where the front cover 102 and the mount holding portion 200 are fastened with screws 116 on the non-grip side. The flash device includes a window member 154, a reflective umbrella 156, a xenon tube 158, a reflective umbrella holding member 160, a flash control unit 162, and a main capacitor 150. The flash light emitter 152 is disposed on the upper side of the main capacitor 150.

  The reflective umbrella holding member 160 holds the reflective umbrella 156 and the xenon tube 158. The reflector 156 reflects and collects light emitted from the xenon tube 158 toward the subject. The window member 154 uniformizes the light collected by the reflector 156 and determines the direction of the light so that a desired irradiation angle is obtained. The flash control unit 162 oscillates, boosts, and rectifies a DC voltage supplied from a power source, and accumulates charges in the main capacitor 150. The flash controller 162 also starts discharging in the xenon tube 158 when receiving a light emission control signal emitted from the controller of the electronic camera 100. First, pre-flash is emitted from the flash light emitting unit 152 toward the subject, the reflected light from the subject is measured, and an appropriate light emission time is calculated based on this. Subsequently, the main light emission is performed from the flash light emitting unit 152 toward the subject, and when the predetermined light emission amount is reached, the energization to the xenon tube 158 is stopped to stop the light emission.

  As is clear from the longitudinal sectional view of FIG. 5, the main capacitor 150 is disposed in the electronic camera 100 held in the horizontal position so that the cylindrical axis of the main capacitor is substantially parallel to the vertical direction. The main capacitor 150 is also disposed behind the body mount 110 and in front of the camera shake correction unit 220.

  In the present embodiment, the flash light emitting unit 152 is fixed, but the flash light emitting unit 152 is housed in the electronic camera 100 when the flash device is not used, and protrudes from the electronic camera 100 when used. You may have the structure of a type | formula.

  FIG. 6 is a view showing a state in which the single front cover 102 is viewed from the back side. The front cover 102 is provided with openings 102b and 102c. A window member 154 is attached to the opening 102b. The opening 102c is a part to which the body mount 110 is attached. The front cover 102 is also provided with two seats 102a protruding to the back side. In the center of the seat 102a, an opening for fitting with the screw 116 is provided. When the front cover 102 and the mount holding part 200 are fastened by the screws 116, the front cover 102 and the mount holding part 200 abut on the seat 102a.

  In FIG. 6, the position of the main capacitor 150 is drawn with a two-dot chain line. The main capacitor 150 is disposed behind a portion where the front cover 102 and the mount holding part 200 are fastened by the screws 116.

  FIG. 7 shows an essential part of the electronic camera 100, and is an exploded perspective view illustrating a state in which the body mount 110, the camera shake correction unit 220, the main capacitor 150, and the like are attached to the mount holding unit 200, as viewed from the back side. Show. In FIG. 7, four screws 112, 226 and 224 are used, but only one screw is shown. Similarly, the rear extension part 200a of the mount holding part 200 is shown as four prisms, but only one lead line and reference numeral are given.

  The following is a brief description because it overlaps with the already described contents. The body mount 110 is fixed to the front surface of the mount holding part 200 with four screws 112. The main capacitor 150 is bonded to a mounting surface 200 c provided on the back side of the mount holding part 200 via a double-sided adhesive tape 222. The camera shake correction unit 220 is fixed to the four rear extension portions 200 a provided on the back side of the mount holding unit 200 with four screws 224.

  The imaging element 214 is mounted on the front side of the holding member 216, and the imaging substrate 218 is fixed on the back side. The imaging element 214 and the imaging substrate 218 are electrically connected. A connection FPC 208 is electrically connected to the imaging substrate 218.

  A diaphragm 206 is fixed to the front side of the optical holding member 210. The OLPF 212 is incorporated into the rectangular opening of the optical holding member 210 and fixed. The optical holding member 210 is fixed to the holding member 216 with four screws 226. The holding member 216 includes a downward extending portion 220a that is a portion extending to the lower side of the camera shake correction portion 220, and a side extending portion that is also a portion extending to the side opposite to the grip side of the camera shake correcting portion 220. 220b is mechanically connected to an actuator for correcting camera shake.

  Two rear extending portions 200 a, which are portions extending rearward on the back side of the mount holding portion 200, are provided on the upper side and two on the lower side of the image sensor 214. The rear extension 200 a provided on the upper side of the image sensor 214 is fastened to the camera shake correction unit 220 by a screw 224 inserted in a through hole provided on the upper side of the image sensor 214 in the camera shake correction unit 220. On the other hand, the rear extension 200a provided on the lower side of the image sensor 214 is fastened to the camera shake correction unit 220 by a screw 224 inserted into a through hole provided in the lower extension 220a of the camera shake correction unit 220. Further, the tripod attachment part 130 is located between the rear extension part 200 a provided on the lower side of the image sensor 214.

  As can be understood from the above description, a focal plane shutter is not provided on the subject side of the image sensor 214. Instead, the image sensor 214 includes a switching element that can electrically control the start and end of the exposure operation, and is configured to be able to control the exposure operation by a so-called electronic shutter system. At this time, the image sensor 214 may be subjected to line-sequential exposure using a rolling shutter system, but it is desirable that exposure be performed using a global shutter system. The image sensor 214 that can perform an exposure operation by the global shutter method may be a CCD, but is preferably a CMOS sensor that hardly causes a phenomenon such as smear or blooming. Alternatively, a lens shutter may be provided on the photographing lens side.

  FIG. 8 is a system diagram schematically illustrating the mechanical connection relationship between the components described above. Hereinafter, each of the connections R1 to R11 illustrated in FIG. 8 will be described.

  The body mount 110 and the mount holding part 200 are screwed using the connection R1, that is, the four screws 112. Therefore, the combination of the body mount 110 and the mount holding part 200 realizes the extremely rigid structure 10.

  The mount holding part 200 and the connection member, that is, the double-sided adhesive tape 222 are joined by connection R2, that is, adhesive. Further, the double-sided adhesive tape 222 and the main capacitor 150 are joined by connection R3, that is, adhesion. As the connection member, instead of the double-sided pressure-sensitive adhesive tape 222, a one-component or two-component adhesive or a hot-melt adhesive can be used. In this case, the connections R2 and R3 are connections by adhesion.

  The mount holding unit 200 and the camera shake correction unit 220 are connected to each other with a connection R4, that is, four screws 224. Therefore, a box structure is formed by the four rear extension parts 200a and the camera shake correction part 220 provided in the mount holding part 200, and it becomes possible to increase the total rigidity in combination with the height of mounting synthesis by screw fastening. .

  The holding member 216 and the camera shake correction unit 220 are connected to R5, that is, screw fastening using a screw (not shown). More specifically, a holding member 216 is screwed to a camera shake correction actuator provided in the camera shake correction unit 220.

  The holding member 216 and the optical holding member 210 are connected to each other with a connection R6, that is, four screws 226.

  The optical holding member 210 and the imaging element 214 are connected by connection R7, that is, by fitting. Positioning in the X-axis direction and the Y-axis direction is performed by the connection R7.

  The holding member 216 and the imaging element 214 are connected using a connection R8, that is, a heat conductive adhesive. The heat generated from the image sensor 214 is transmitted to the holding member 216 via the heat conductive adhesive, whereby the cooling of the image sensor 214 can be promoted.

  The optical holding member 210 and the OLPF 212 are connected by connection R9, that is, by adhesion. As the adhesive used at this time, it is desirable to use an adhesive that can be elastically deformed even after curing and can absorb a difference in thermal expansion between the optical holding member 210 and the OLPF 212. Moreover, it can replace with the connection by adhesion | attachment as connection R9, and can also be set as the connection using an elastic press member.

  The optical holding member 210 and the diaphragm 206 can be connected by connection R10, that is, by elastic pressing using an elastic member. That is, the diaphragm 206 is biased toward the optical holding member 210 by the elastic member, and the optical holding member 210 and the diaphragm 206 are connected so as to vibrate efficiently when the diaphragm 206 is vibrated.

  The mount holding part 200 and the front cover 102 are connected by a connection means including connection R11, that is, screw fastening using two screws 116. For example, another screw hole may be provided on the upper surface, left side surface, bottom surface, and the like of the front cover 102 and connected to the rear cover 104 and the like by screw fastening.

  In the above, the electronic camera 100 without the photographic lens has been described, but the photographic lens is attached to the body mount 110 when in use. That is, the mount provided on the photographic lens side (hereinafter, the mount provided on the photographic lens side is referred to as a lens mount and is distinguished from the body mount 110) and the body mount 110 are coupled. The coupling of the lens mount and the body mount 110 further increases the rigidity of the mount holding unit 200. Further, when the completed component shown in FIG. 7 is combined and viewed as a single photographing unit, a photographing lens is attached to the photographing unit and coupled, so that the mass of the whole photographing unit is equivalent. Increase. As a result, it is possible to effectively reduce the impact generated in the main capacitor 150 and transmitted to the image sensor 214 during flash emission.

− Modification 1 −
Although the example in which the main capacitor 150 is fixed to the back surface side (back surface side) of the mounting surface of the body mount 110 in the mount holding unit 200 with the double-sided adhesive tape 222 has been described above, it can be fixed as described below. is there.

  FIG. 9 is a diagram showing a horizontal cross section similar to the IV-IV cross section in FIG. 1 of the electronic camera 100, and is a diagram illustrating a first modification regarding a method of fixing the main capacitor 150. 4 is that the mount holding part 200 in FIG. 4 is replaced with the mount holding part 201 in FIG. 9, and that a pressing plate 232 and a screw 230 are added. The other points are the same as those shown in FIG. Among the constituent elements in FIG. 9, the same constituent elements as those shown in FIG.

  FIG. 10 is an exploded perspective view for explaining a state in which the body mount 110 and the main capacitor 150 are attached to the mount holding part 201, and shows a state seen from the back side as in FIG. In FIG. 10, an example is shown in which the four rear extension portions 201a of the mount holding portion 201 are provided with a prismatic shape, but only one lead line and reference numeral are given.

  Of the four rear extension parts 201a provided on the back side of the mount holding part 201, the attachment for attaching the pressing plate 232 to the base part of the two rear extension parts 201a provided on the opposite side of the grip with respect to the optical axis. A surface 201d is provided. The mounting surface 201d is provided with a screw hole 201e for screwing the screw 230 therein.

  In the mount holding part 201, an attachment surface 201c is provided at a position on the back side (back side) and the anti-grip side of the surface to which the body mount 110 is attached. The attachment surface 201c forms a part of a cylindrical surface centering on a cylindrical axis extending in a direction parallel to the Y-axis direction. Two screw holes 201b are provided on the front side of the position facing the mounting surface 201c. The screw hole 210 b is for screwing a screw 116 (see FIGS. 1A and 5) for fixing the front cover 102 to the mount holding portion 201.

  The main capacitor 105 is urged and fixed toward the mounting surface 201 c by two holding plates 232 fixed to the mounting surface 201 d of the mount holding part 201 by screws 230. At this time, an elastic cushion material 234 may be interposed between the main capacitor 150 and the mounting surface 201c as necessary.

  Also by the fixing method of the main capacitor 150 described with reference to FIG. 9 and FIG. 10, the body mount 110 and the mount holding portion 201 are fastened with screws to increase the rigidity. In addition, the camera shake correction unit 220 is screwed to the rear extension 201a to obtain a strong box structure. Therefore, it is possible to reduce the vibration that occurs in the main capacitor 150 during the flash emission and is transmitted to the image sensor 214, and to effectively suppress the occurrence of image blur.

− Modification 2 −
Although the example in which the main capacitor 150 is fixed to the back surface side of the surface to which the body mount 110 is attached has been described above, an example in which the main capacitor 150 is fixed to the front cover 102 will be described below.

  FIG. 11 is a diagram illustrating a horizontal section similar to the IV-IV section in FIG. 1 of the electronic camera 100, and is a diagram illustrating a second modification regarding the fixing method of the main capacitor 150. 4 differs from that shown in FIG. 4 in that the mount holding unit 200 in FIG. 4 is replaced by the mount holding unit 203 in FIG. 11 and the main capacitor 150 is not in the mount holding unit 203 but in the front cover 102. It is a point attached to. The other points are the same as those shown in FIG. Among the constituent elements in FIG. 9, the same constituent elements as those shown in FIG.

  As shown in FIG. 11, the main capacitor 150 is attached to the corner of the front cover 102 on the side opposite to the grip. At this time, the main capacitor 150 having a cylindrical shape is disposed so that the cylindrical axis thereof is substantially parallel to the Y-axis direction. In connecting the main capacitor 150 and the front cover 102, a double-sided adhesive tape 236 can be used. The double-sided pressure-sensitive adhesive tape 236 can be the same as the double-sided pressure-sensitive adhesive tape 222, and can be a thin one based on paper, non-woven fabric, plastic film or the like, or can be based on a foam or the like. A thick material may be used.

  As a means for fixing the main capacitor 150 to the front cover 102, in addition to the double-sided pressure-sensitive adhesive tape 222 described above, the main capacitor 150 is fixed using an adhesive, screwed to the front cover 102, caulked, or spot welded. There are various methods such as holding using a holding plate.

  The front cover 102 and the mount holding part 203 are fastened by screws 116. The front cover 102 and the mount holding part 200 are fastened using the screws 116 on the side opposite to the grip where the main capacitor 150 is disposed, whereby the rigidity of the mount holding part 200 can be increased. At this time, by forming the front cover 102 with a material having a relatively high rigidity such as a metal, it is possible to realize a further increase in rigidity of the mount holding portion 200.

  As described above, in the second modification, the main capacitor 150 is not attached to the mount holding unit 203. Instead, the main capacitor 150 is attached to the front cover 102. In other words, the front cover 102 is interposed between the main capacitor 150 and the mount holding portion 203. However, for the reasons described below, it is possible to obtain high mounting rigidity as described above.

  Since the battery chamber 122 and the control printed board 124 are disposed on the grip side, the mount holding portion 203 can be disposed close to the non-grip side. That is, the front corner (the portion where the main capacitor 150 is attached) on the non-grip side of the front cover 102 can be brought closer to the mount holding portion 203. The front corner of the front cover 102 is configured with a surface having a large curvature (a tight bending). This means that the rigidity is structurally high. That is, the main capacitor 150 and the mount holding portion 203 are connected with a high rigidity portion of the front cover 102 as an intermediate. In addition, the mounting rigidity of the main capacitor 150 can be increased in combination with the front cover 102 being connected to the mount holding portion 203 by the screw 116 on the non-grip side. Therefore, it is possible to reduce the vibration that occurs in the main capacitor 150 during the flash emission and is transmitted to the image sensor 214, and to effectively suppress the occurrence of image blur.

  In the above description, the electronic camera 100 has been described as including the camera shake correction unit 220 (in-body camera shake correction unit) that reduces the camera shake by moving the image sensor 214 along a plane orthogonal to the optical axis of the imaging lens. The present invention can also be applied to a device that does not include the correction unit 220. Alternatively, the present invention can also be applied to an electronic camera that corrects camera shake by moving an optical element in a photographing lens. Furthermore, the present invention can also be applied to a movie camera that incorporates a flash device and can take still images.

DESCRIPTION OF SYMBOLS 100 ... Electronic camera 102 ... Front cover 104 ... Rear cover 108 ... AF auxiliary light source 110 ... Body mount 112, 116, 224, 226, 230 ... Screw 118 ... Signal contact 122 ... Battery compartment 124 ... Control printed board 130 ... Tripod attachment part 150 ... main capacitor 152 ... flash light emitting part 156 ... reflector 158 ... xenon tubes 200, 201, 203 ... mount holding parts 200a, 201a, 203a ... rear extension part 206 ... diaphragm 208 ... connection FPC
210 ... Optical holding member 212 ... OLPF
214 ... Imaging element 216 ... Holding member 218 ... Imaging substrate 220 ... Camera shake correction part 220a ... Downward extension part 220b ... Side extension part 222, 236 ... Double-sided adhesive tape 232 ... Holding plate 234 ... Cushion material 300 ... Display device 302 … Electronic viewfinder

Claims (16)

An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount;
An image sensor that converts a subject image formed by the photographing lens into an image signal;
An exterior member covering at least the front surface of the camera body;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. An electronic camera that is disposed in a space surrounded by and fixed to the mount holding portion. The image sensor is disposed behind the image sensor and supports the image sensor movably along a plane perpendicular to the optical axis of the photographing lens, and the camera shake is generated on the image sensor in accordance with the detected camera shake. A camera shake correction unit that corrects the camera shake by moving the image sensor in a direction to reduce blur of the subject image;
The camera shake correction unit includes an anti-grip side extending portion that extends to a position covering the back of the main capacitor on the anti-grip side when the electronic camera held in a lateral position is viewed from the subject side, In addition to the imaging element, the body mount, and the exterior member, the main capacitor is disposed in a space surrounded by the anti-grip side extending portion,
The mount holding portion includes a rear extension portion extending from the portion holding the body mount to the back side,
The electronic camera according to claim 1, wherein the camera shake correction unit is fixed to the rearward extension portion. The camera shake correction unit further includes a lower extension portion that extends downward from a lower end of the image sensor when the electronic camera held in a lateral position is viewed from a subject side, and the camera shake correction is performed. The electronic camera according to claim 2, wherein the portion is fixed to the rearward extension portion of the mount holding portion at the lower extension portion. In the lower extension part, a drive unit for moving the image sensor is arranged,
4. The electronic camera according to claim 3, further comprising an electronic viewfinder unit disposed above the camera shake correction unit when the electronic camera held in a lateral position is viewed from a subject side. The main capacitor has a cylindrical shape and is disposed in the electronic camera held in a lateral position so that an extending direction of the cylindrical shaft is substantially parallel to a vertical direction. The electronic camera according to any one of claims 1 to 4. A battery chamber containing a battery for supplying electric power for the electronic camera to operate;
A control board on which a control circuit for controlling the operation of the electronic camera is mounted;
The battery chamber is disposed on the grip side located on the left side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side, and the control board is disposed on the battery chamber. The electronic camera according to claim 1, wherein the electronic camera is disposed rearward. It further includes a light emitting unit that emits a flash toward the subject,
5. The electronic camera according to claim 1, wherein the light emitting unit is disposed above the main capacitor in the electronic camera held in a lateral position. 5. The electronic camera according to claim 1, wherein the image pickup device is a CMOS image pickup device having a global shutter function for simultaneously starting and ending charge accumulation in a plurality of pixels. 6. . An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount;
An image sensor that converts a subject image formed by the photographing lens into an image signal, the image sensor including a switching element that can electrically control the start and end of an exposure operation;
An optical element disposed behind the body mount and in front of the imaging element;
An exterior member covering at least the front surface of the camera body;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. An electronic camera, wherein the electronic camera is fixed to a back surface side of a portion of the mount holding portion to which the body mount is fixed. The image sensor is disposed behind the image sensor and supports the image sensor movably along a plane perpendicular to the optical axis of the photographing lens, and the camera shake is generated on the image sensor in accordance with the detected camera shake. A camera shake correction unit that corrects the camera shake by moving the image sensor in a direction to reduce blur of the subject image;
The mount holding portion includes a rear extension portion extending from the portion holding the body mount to the back side,
The electronic camera according to claim 9, wherein the camera shake correction unit is fixed to the rearward extension portion. The camera shake correction unit further includes a lower extension portion that extends downward from a lower end of the image sensor when the electronic camera held in a lateral position is viewed from a subject side, and the camera shake correction is performed. The electronic camera according to claim 10, wherein the portion is fixed to the rearward extension portion of the mount holding portion at the lower extension portion. The camera shake correction unit includes an anti-grip side extending portion that extends to a position covering the back of the main capacitor on the anti-grip side when the electronic camera held in a lateral position is viewed from the subject side, 10. The electronic camera according to claim 9, wherein, in addition to the image sensor, the body mount, and the exterior member, the main capacitor is disposed in a space surrounded by the anti-grip side extending portion. An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount, the mount holding portion including a rearward extending portion extending from the portion holding the body mount to the back side;
An image sensor that converts a subject image formed by the photographing lens into an image signal, the image sensor including a switching element that can electrically control the start and end of an exposure operation;
An exterior member covering at least the front surface of the camera body;
The image sensor is disposed behind the image sensor and supports the image sensor movably along a plane perpendicular to the optical axis of the photographing lens, and the camera shake is generated on the image sensor in accordance with the detected camera shake. A camera shake correction unit that corrects the camera shake by moving the image sensor in a direction to reduce blur of the subject image;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. And is fixed to the back side of the portion of the mount holding portion to which the body mount is fixed,
The electronic camera is characterized in that the camera shake correction unit is fixed to the rearward extension portion. A battery chamber containing a battery for supplying electric power for the electronic camera to operate;
A control board on which a control circuit for controlling the operation of the electronic camera is mounted;
The battery chamber is disposed on the grip side located on the left side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side, and the control board is disposed on the battery chamber. The electronic camera according to claim 13, wherein the electronic camera is disposed rearward. The main capacitor has a cylindrical shape and is disposed in the electronic camera held in a lateral position so that an extending direction of the cylindrical shaft is substantially parallel to a vertical direction. The electronic camera according to claim 13. An electronic camera with an interchangeable taking lens equipped with a flash device,
A body mount that is provided on the front surface of the camera body and has a ring shape for detachably mounting the taking lens;
A mount holding portion for holding the body mount;
An image sensor that converts a subject image formed by the photographing lens into an image signal;
An exterior member covering at least the front surface of the camera body;
A main capacitor for temporarily storing energy for light emission of the flash device;
The main capacitor has the imaging element, the body mount, and the exterior member on the opposite grip side located on the right side of the optical axis of the photographing lens when the electronic camera held in a lateral position is viewed from the subject side. An electronic camera that is disposed in a space surrounded by and fixed to a corner of the exterior member.

Images