JP2020076906A - Illumination device and control method therefor - Google Patents

Abstract

To provide an illumination device capable of decreasing intrusion of foreign matters, and capable of releasing heat of a light emitting part.SOLUTION: A first outer covering member being an outer covering of a movable part including a light emitting part is provided with a first hole on a surface facing a coupling part for rotatably connecting the movable part to a main body part. A second outer covering member being an outer covering of the coupling part is provided with a second hole and a third hole on a surface facing the movable part. When temperature of the light emitting part acquired by temperature acquisition means is equal to or more than a first threshold value, driving means rotates the movable part so that it is located at a first position where the second hole is not covered by the movable part and the third hole is overlapped with the first hole. When temperature of the light emitting part acquired by the temperature acquisition means is less than a second threshold value, the driving means rotates the movable part so that it is located at a second position where the second hole and the third hole are covered by the movable part.SELECTED DRAWING: Figure 6

Description

  The present invention relates to heat dissipation control of a lighting device.

  Generally, a strobe device, which is an illumination device used in an imaging device such as a digital camera, uses a xenon tube, an LED, or the like as a light source. These light sources generate heat due to excessive continuous light emission, and there is a concern that the performance of the light source itself may deteriorate or the surrounding optical components may be deformed, thereby changing the light emitting performance.

  In response to such concerns, the conventional strobe device limits the light emission according to the temperature, such as limiting the light emission amount and the light emission interval according to the temperature of the light emitting portion having the light source, or temporarily setting the light emission prohibition state. There is something to do. However, if the light emission restriction state continues for a long time, the user may not be able to shoot at a desired timing, which may lead to a loss of shooting opportunities.

  Therefore, in Patent Document 1, a heat radiation hole is provided in a built-in strobe housing portion of the camera and a part of a built-in strobe exterior portion, and when the built-in strobe moves to a light emitting position, the heat radiation hole is exposed to the outside air, and a light emitting portion including a light source. We propose a configuration that allows the heat dissipation of. With such a configuration, it is possible to suppress the temperature rise of the light emitting unit and make it difficult to limit the light emission.

JP, 2002-287221, A

  However, in the conventional technique disclosed in Patent Document 1, the heat dissipation hole is exposed to the outside air during normal shooting, which may cause foreign matter to enter the strobe device during shooting.

  Therefore, an object of the present invention is to provide a lighting device capable of reducing the intrusion of foreign matter and radiating heat from the light emitting section.

  In order to achieve the above-mentioned object, a lighting device according to the present invention includes a main body portion, a movable portion having a light emitting portion, a connecting portion that rotatably connects the movable portion with respect to the main body portion, and Temperature acquisition means for acquiring the temperature of the part, drive means for rotating the movable part with respect to the main body part, drive control means for controlling the drive means based on the temperature acquired by the temperature acquisition means, And a second outer member that is the outer casing of the connecting portion, wherein the first outer member that is the outer casing of the movable portion is provided with a first hole in a surface facing the connecting portion. Is provided with a second hole and a third hole on the surface facing the movable part, and the drive control means, when the temperature acquired by the temperature acquisition means is equal to or higher than a first threshold value. , The movable portion is rotated by the drive means so that the second hole portion is not covered with the movable portion and the third hole portion is at a first position overlapping with the first hole portion, When the temperature acquired by the temperature acquisition unit is less than a second threshold value, the drive unit moves the second hole and the third hole to a second position covered by the movable unit. It is characterized in that the movable part is rotated.

  According to the present invention, it is possible to provide a lighting device capable of reducing the intrusion of foreign matter and radiating heat from the light emitting unit.

It is an appearance perspective view of the imaging system concerning the embodiment of the present invention. It is a block diagram of camera 100 concerning an embodiment of the present invention. FIG. 3 is a block diagram of a flash device 200 according to an embodiment of the present invention. FIG. 6 is a diagram showing a movable angle range of a strobe head portion 240 with respect to a strobe body 230 of a strobe device 200 according to an embodiment of the present invention. It is a flowchart figure which shows operation | movement regarding the imaging process of the camera 100 which concerns on embodiment of this invention. It is a figure which shows the relationship between the structure of the flash device 200 and the rotation angle of the flash head part 240 which concern on heat dissipation which concerns on embodiment of this invention. It is a figure which shows the flowchart of heat dissipation control of the imaging system which concerns on embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the present invention according to the claims, and all combinations of the features described in the present embodiments are not necessarily essential for solving the problems of the present invention. Absent.

  FIG. 1 is an external view showing a strobe device as an example of a digital camera and an illuminating device mounted on the digital camera that constitutes an imaging system according to an embodiment of the present invention. FIG. FIG. 1B is a perspective view seen from the back side. In the present embodiment, a digital camera is illustrated as the image pickup device, but the image pickup device is not limited to this. In the following description, the front side of the camera 100 is the front, the back side is the back, and the left and right when viewed from the back side are the left and right of the camera 100.

  As shown in FIG. 1, the imaging system of the present embodiment includes a camera 100 and an external strobe device 200 detachably attached to the camera 100. An interchangeable lens 300 is detachably attached to the front side of the camera 100, and a release button 122, an external strobe connection section 120 (accessory shoe), and various operation dials (not shown) are attached to the upper surface of the camera 100. Is provided. A pop-up built-in flash 119 (see FIG. 2) is housed in the upper surface of the camera 100. A camera image display unit 107 such as an LCD and a finder eyepiece 121 are provided on the back surface of the camera 100.

  The flash device 200 has a flash main body 230 that is a main body that is detachably attached to the external flash connecting portion 120 of the camera 100 via the camera connecting portion 207. A strobe head section 240 having a light emitting section 202 is rotatably supported by the strobe body 230 via a bounce mechanism section 250. That is, the strobe head portion 240, which is a movable portion, is rotatably supported with respect to the strobe body 230, which is a main body portion, via the bounce mechanism portion 250, which is a connecting portion. A strobe display unit 209, various strobe operation members 208, and the like are provided on the back surface of the strobe main body 230.

  Next, the configuration of the camera 100 according to this embodiment will be described with reference to FIG. FIG. 2 is a block diagram illustrating the camera 100. In FIG. 2, a camera MPU 101 controls the entire camera such as a shooting sequence. Further, the camera MPU 101 sets the exposure condition based on the exposure condition (Tv value, Av value, ISO sensitivity value) arbitrarily set by the user, the shooting mode, and the brightness signal obtained from the photometry unit 112.

  The image sensor 103 is composed of a CCD sensor, a CMOS sensor, or the like, and photoelectrically converts a subject image formed by passing through the photographing optical system of the interchangeable lens 300 and outputs it as analog image data to the A / D converter 104. The timing signal generation circuit 102 generates a timing signal required to drive the image sensor 103. The A / D converter 104 converts the analog image data output from the image sensor 103 into digital image data. The memory controller 105 controls reading and writing of memory, refresh operation of the buffer memory 106, and the like. The camera image display unit 107 displays the image data stored in the buffer memory 106. The recording medium I / F 108 is an interface with the recording medium 109. The recording medium 109 is composed of a memory card, a hard disk, or the like.

  The motor control unit 110 controls a motor (not shown) according to a signal from the camera MPU 101 during an exposure operation to perform an up / down operation of a mirror (not shown) and a charge operation of a shutter. The shutter control unit 111 controls the exposure operation by cutting off the power supply to the shutter front curtain and the shutter rear curtain (not shown) in accordance with a signal from the camera MPU 101 to run the curtain.

  The photometric unit 112 outputs the output from the photometric sensor 113, which is obtained by dividing the screen into a plurality of areas, to the camera MPU 101 as a luminance signal of each area in the screen. The camera MPU 101 converts this luminance signal into a digital signal by an A / D converter (not shown) and calculates a shutter control value (Tv value), an aperture control value (Av value), a gain setting value (ISO sensitivity value), etc. To do. Further, the photometric unit 112 outputs a luminance signal when the built-in strobe 119 or the strobe device 200 preliminarily emits light toward the subject to the camera MPU 101, and also calculates a main light emission amount at the time of flash photographing.

  The lens control unit 114 communicates between the interchangeable lens 300 and the camera 100 via a lens mount contact (not shown), operates a lens drive motor and a lens diaphragm motor (not shown), and controls focus adjustment and diaphragm of the lens. To do. The focus detection unit 115 detects a defocus amount for an object for AF (autofocus) using a phase difference detection method or the like.

  The camera posture detection unit 116 detects the tilt of the camera 100 in the front-rear direction and the left-right direction. The release switch 1 (SW1) 117a is turned on by the first stroke of the release button 122, and instructs the camera MPU 101 to start AF and photometry. The release switch 2 (SW2) 117b is turned on by the second stroke of the release button 122, and instructs the camera MPU 101 to start the exposure operation (shooting).

  The flash control unit 118 performs a light emission process such as selection of a light emission mode (flash light emission or flat light emission), an instruction of a light emission pattern (pre-light emission or main light emission), and an auto bounce drive instruction. The camera MPU 101 communicates with the built-in strobe 119 via the strobe control unit 118, and communicates with the strobe device 200 via the strobe control unit 118 and the external strobe connection unit 120.

  Next, the configuration of the flash device 200 according to this embodiment will be described with reference to FIG. FIG. 3 is a block diagram illustrating the flash device 200. The flash main body 230 has a flash MPU 201, a flash operating member 208, a flash display unit 209, a bounce drive control unit 206, and a camera connection unit 207.

  The strobe MPU 201 is a control unit that controls the entire strobe device 200, and, for example, selects and controls a light emission mode such as flash light emission or flat light emission, controls the amount of light emission, restricts light emission, prohibits light emission, and the light emission intensity and light emission of flat light emission. Light emission control such as time control is performed. The strobe MPU 201 also performs drive control such as control of the light emission irradiation angle and determination of the angle of the strobe head unit 240 during auto bounce drive control.

  Further, the strobe MPU 201 sets a light emission mode such as flash light emission or flat light emission, and a light emission condition such as a zoom position set in the zoom drive unit 203 of the strobe head unit 240. The strobe MPU 201 also calculates the optimum shooting distance based on the exposure condition and the light emission condition acquired from the camera 100. Further, the strobe MPU 201 calculates the light emission distance based on the reflection surface distance measured by the distance measuring photometry unit 204 of the strobe head unit 240 and the subject distance.

  The bounce drive control unit 206 controls the motor according to a signal from the strobe MPU 201 to rotate the strobe head unit 240 in the horizontal direction and the vertical direction with respect to the strobe main body 230. Hereinafter, controlling the motor in accordance with the signal from the strobe MPU 201 and rotating the strobe head unit 240 in this manner is referred to as auto bounce drive.

  The camera connection unit 207 communicates with the camera 100 via the external strobe connection unit 120 of the camera 100.

  The bounce mechanism unit 250 includes a head angle detection unit 205, a main capacitor (not shown) that charges energy for causing the light emitting unit 202 to emit light, and moves the strobe head unit 240 horizontally with respect to the strobe body 230. Hold vertically rotatable. As a result, it is possible to perform shooting while changing the irradiation direction of the strobe light from the light emitting unit 202. In the strobe device 200 of the present embodiment, the strobe head portion 240 is rotatable with respect to the strobe body 230 in the horizontal direction and the vertical direction, respectively, but it is rotatable in either the vertical direction or the horizontal direction. It may have any configuration.

  The head angle detection unit 205 includes a rotation angle sensor including a substrate having a phase pattern and a contact brush, and detects a relative rotation angle of the strobe head unit 240 with respect to the strobe main body 230 and outputs it to the strobe MPU 201. As shown in FIG. 4, the head angle detection unit 205 detects a rotation angle around the Z axis as a horizontal head unit angle η with respect to a normal position (head unit angle 0 °) where the flash head unit 240 faces the subject. To do. Further, the head angle detection unit 205 detects a rotation angle around the X axis as a vertical head portion angle θ with respect to the normal position (head portion angle 0 °) where the strobe head portion 240 faces the subject. The head angle detection unit 205 may use an optical detection sensor such as a photo interrupter or a photo reflector.

  Here, in the present embodiment, as shown in FIG. 4, the movable angle range of the strobe head portion 240 with respect to the strobe body 230 is set. FIG. 4 is a diagram showing a movable angle range of the strobe head portion 240 with respect to the strobe body 230.

  The horizontal head angle η is η = −90 ° when the strobe head 240 faces left when viewed from the user (the back side of the camera 100), and η = + 90 ° when the strobe head 240 faces right. The direction toward the back side is η = ± 180 ° (−180 ° when rotating leftward, + 180 ° when rotating rightward). The vertical head portion angle θ is θ = + 90 ° in the direction in which the strobe head portion 240 is vertically upward when viewed from the user.

  Further, in the present embodiment, the movable angle range of the strobe head portion 240 with respect to the strobe body 230 is set to a horizontal head portion angle η: −180 ° to + 180 ° and a vertical head portion angle θ: 0 to + 150 °. The maximum movable angle θK (see FIG. 6) in auto bounce drive for light emission photography is + 120 °.

  The strobe head unit 240 has a photometry unit for distance measurement 204, a light emitting unit 202, a temperature acquisition unit 210, and a zoom drive unit 203. The light emitting unit 202 has a xenon tube (not shown), which is a light source, a reflector, a Fresnel lens, and a strobe light emission circuit. The strobe light emission circuit causes the xenon tube to emit strobe light in accordance with a light emission signal from the strobe MPU 201. Since the xenon tube generates heat due to excessive continuous light emission, it is desirable that the strobe device 200 be configured to be able to dissipate heat from the light emitting section 202. The heat dissipation structure of this embodiment will be described later. In this embodiment, the light source is a xenon tube, but an LED may be used.

  The temperature acquisition unit 210 is a thermometer in this embodiment, and measures the temperature T of the light emitting unit 202. The strobe MPU 201 controls heat dissipation of the strobe device 200 based on the temperature T of the light emitting unit 202. The heat dissipation control will be described later. In this embodiment, the temperature acquisition unit 210 acquires the temperature T from the output of the thermometer. You may get it. The light emitting unit 202 includes a plurality of optical components as described above, and heat generated by light emission has different influences on the optical components. Therefore, for example, a Fresnel lens or the like has a large influence on the optical components. It is preferable to arrange the temperature acquisition unit 210.

  The zoom drive unit 203 is composed of a drive motor, a lead screw, and the like (not shown). The zoom drive unit 203 drives the xenon tube or reflector of the light emitting unit 202 based on the control signal from the strobe MPU 201 to change the illumination range of the strobe light. This makes it possible to illuminate the subject with strobe light that matches the focal length of the interchangeable lens 300 when the camera 100 takes an image. Note that the change of the illumination range by the zoom drive unit 203 is to widen or narrow the width of the strobe light emitted from the strobe device 200, and the irradiation optical axis at the center of the illumination range is substantially constant. is there. On the other hand, when the strobe head 240 is rotated with respect to the strobe body 230, the direction of the strobe light irradiation optical axis (irradiation direction) changes. As described above, changing the irradiation range and changing the irradiation direction are different.

  The distance measuring photometer unit 204 receives the reflected light of the strobe light emitted from the light emitting unit 202 from the distance measuring object by the distance measuring photometer sensor and outputs it as a luminance signal to the strobe MPU 201. The strobe MPU 201 performs A / D conversion on the brightness signal by an A / D converter (not shown), and calculates a distance according to the brightness signal. In the strobe device 200 according to the present embodiment, the distance measuring photometer unit 204 measures the distance to the reflector (for example, the ceiling) and the distance to the subject, and the strobe MPU 201 is suitable for the subject based on the distance information. Determines the direction of strobe light emission. Then, the strobe MPU 201 drives the strobe head unit 240 by the bounce drive control unit 206 so that the rotation angle corresponds to a desired irradiation direction, and causes the strobe device 200 to perform main light emission. The above is the auto bounce drive for light emission shooting, but a known method may be used as a method for determining the irradiation direction of the strobe light emission suitable for the subject, and a detailed description thereof will be omitted.

  Next, with reference to FIG. 5, an operation relating to the photographing process of the camera 100 will be described. FIG. 5 is a flowchart showing the operation relating to the photographing process of the camera 100. In the process of FIG. 5, the program stored in the ROM (not shown) of the camera 100 is not shown when the power of the camera 100 is turned on. It is expanded in RAM and executed by the camera MPU 101.

  In step S501, when the release switch 1 (SW1) 117a is turned on, the camera MPU 101 proceeds to step S502. In step S502, the camera MPU 101 performs autofocus control for moving the focus lens of the interchangeable lens 300 to the in-focus position by the lens control unit 114 after distance measurement by the focus detection unit 115, and proceeds to step S503.

  In step S503, the camera MPU 101 performs a photometric operation using the photometric unit 112 and acquires the photometric result. For example, when the photometric sensor 113 of the photometric unit 112 performs photometry in each of the six divided areas, the camera MPU 101 uses EVb (i) (i = 0 to 0) as the acquired brightness value of each area as the photometric result. 5), it is stored in the buffer memory 106, and the process proceeds to step S504.

  In step S504, the camera MPU 101 performs exposure calculation by a known algorithm based on the photometric result acquired in step S503 and the set shooting mode, and sets various exposure conditions to determine the exposure value (EV). , And proceeds to step S505. The various exposure conditions here are a shutter control value (Tv value), an aperture control value (Av value), and a gain setting value (ISO sensitivity).

  In step S505, the camera MPU 101 transmits an auto bounce drive instruction for flash photography to the strobe device 200 via the strobe control unit 118, and proceeds to step S506. In step S506, the camera MPU 101 transmits the various exposure conditions (Tv value, Av value, ISO sensitivity value) calculated in step S504 to the flash device 200 via the flash control unit 118, and proceeds to step S507. The auto-bounce drive for flash photography includes measurement of the distance to the reflector and the distance to the subject, determination of the irradiation direction of the stroboscopic light emission, and driving of the strobe head unit 240 with a rotation angle corresponding to the irradiation direction.

  In step S507, the camera MPU 101 checks the auto bounce end notification from the flash device 200. Specifically, if the camera MPU 101 has acquired the bounce drive end notification from the strobe device 200, it proceeds to step S508 as the end of auto bounce, and if not acquired, continues checking the auto bounce end notification.

  In step S508, the camera MPU 101 proceeds to step S510 when the release switch 2 (SW2) 117b is turned on, and proceeds to step S509 when it is off. In step S509, the camera MPU 101 determines whether the release switch 1 (SW1) 117a continues to be in the on state. If it is on, the process returns to step S508, and if it is off, the process returns to step S501.

  In step S510, the camera MPU 101 instructs the strobe device 200 to perform preliminary light emission with a predetermined light amount via the strobe control unit 118, and causes the light emitting unit 202 of the strobe device 200 to preliminarily emit strobe light. Then, the camera MPU 101 calculates the strobe main light emission amount at the time of light emission shooting based on the luminance signal acquired by the preliminary light emission, and proceeds to step S511.

  In step S511, the camera MPU 101 performs the mirror up operation by the motor control unit 110, and proceeds to step S512. In step S512, the camera MPU 101 starts accumulating charges in the image sensor 103, and proceeds to step S513. In step S513, the camera MPU 101 causes the shutter control unit 111 to move the shutter to start exposure of the image sensor 103, and proceeds to step S514.

  In step S514, the camera MPU 101 causes the strobe device 200 to perform main light emission via the strobe control unit 118 with the strobe main light emission amount calculated in step S510. Then, the camera MPU 101 performs an exposure operation under various exposure conditions (Av value, Tv value, ISO sensitivity value) in synchronization with the main flash of the flash device 200, and proceeds to step S515.

  In step S515, the camera MPU 101 closes the shutter by the shutter control unit 111, and proceeds to step S516. In step S516, the camera MPU 101 ends the charge accumulation in the image sensor 103, and proceeds to step S517. In step S517, the camera MPU 101 performs the mirror down operation by the motor control unit 110, and proceeds to step S518.

  In step S518, the camera MPU 101 reads the image signal from the image sensor 103, and temporarily records the image data that has been A / D converted by the A / D converter 104 in the buffer memory 106. When the camera MPU 101 reads out all the image signals from the image sensor 103, the camera MPU 101 performs predetermined development processing on the image signals to create image data, and proceeds to step S519.

  In step S519, the camera MPU 101 records the image data created in step S518 as an image file on the recording medium 109 via the recording medium I / F 108, and ends the series of photographing processes.

  Next, the heat dissipation configuration and control of the strobe device 200 will be described. First, the configuration of the strobe device 200 relating to heat dissipation will be described with reference to FIG. FIG. 6 is a diagram showing the relationship between the configuration of the strobe device 200 relating to heat dissipation and the rotation angle of the strobe head portion 240. FIG. 6A is a view of the strobe device 200 when the vertical head angle θ is 0 °, and FIG. 6B is a cross-sectional view of FIG. 6A. The parts related to heat dissipation have been simplified for easy understanding. FIG. 6C is a cross-sectional view when the vertical head portion angle θ becomes the maximum movable angle θK (120 °) in auto bounce driving for light emission shooting. FIG. 6D is a cross-sectional view when the vertical head portion angle θ becomes the head portion angle θL (150 °) in the heat radiation posture. The heat dissipation posture will be described later.

  The exterior member 241 (first exterior member) of the flash head portion 240 is molded of resin or the like. The first heat dissipation holes 242 are holes (first holes) provided on the surface of the exterior member 241 that faces the bounce mechanism portion 250. The first radiating hole end 242a is an end on the smaller angle side with respect to the position where the vertical head angle θ is 0 °, and the first radiating hole end 242b is the end on the larger angle side. is there. Hereinafter, the large / small angle will be described with reference to the position where the vertical head angle θ is 0 °. The first shield end 243 is an end of the surface of the exterior member 241 facing the bounce mechanism 250 with a small angle, and the second shield end 244 is the end of the face facing the bounce mechanism 250 with a large angle. Is. The first space 245 is a space covered by the exterior member 241, and is a space in which the temperature rises due to the heat generation of the light emitting unit 202 arranged in the first space 245.

  The exterior member 251 (second exterior member) of the bounce mechanism unit 250 is molded of resin or the like. The second heat dissipation hole 252 and the third heat dissipation hole 253 are holes provided on the surface of the exterior member 251 facing the strobe head portion 240, and the second heat dissipation hole 252 (second hole portion) is The three heat radiation holes 253 (third hole portions) are arranged on the smaller angle side. The second radiating hole end 252a is the end on the smaller angle side, and the second radiating hole end 252b is the end on the larger angle side. The third radiating hole end 253a is the end on the smaller angle side, and the third radiating hole end 253b is the end on the larger angle side. The second space 254 is a space covered by the exterior member 251.

  Next, the positional relationship between each heat dissipation hole and each shield end will be described with reference to FIG. C to J in FIG. 6B show the angles in the vertical direction between two points with the rotation center of the strobe head unit 240 as the apex at the position where the vertical direction head unit angle θ is 0 °. C is an angle from the first shield end 243 to the third heat dissipation hole end 253a, and is 165 ° in the present embodiment. D is the angle from the irradiation optical axis of the strobe light to the second shield end 244 when the vertical head portion angle θ is 0 °, and is 110 ° in this embodiment. E is the angle from the irradiation optical axis of the strobe light to the third heat dissipation hole end 253b when the vertical head angle θ is 0 °, and is 105 ° in this embodiment. F is an angle from the first shield end 243 to the second heat dissipation hole end 252a, and is 140 ° in this embodiment. G is the angle from the first shield end 243 to the second heat dissipation hole end 252b, and is 145 ° in this embodiment. H is an angle from the first heat dissipation hole end 242a to the third heat dissipation hole end 253a, and is 150 ° in the present embodiment. I is an angle indicating the opening width of the third heat dissipation hole 253, which is 5 ° in the present embodiment. J is an angle indicating the opening width of the first heat dissipation hole 242, and is 10 ° in this embodiment.

  θK is the irradiation of strobe light when the vertical head angle θ is 0 ° from the optical axis of the strobe light when the vertical head angle θ is the maximum movable angle in the auto bounce drive for emission photography. It is an angle to the optical axis, and is 120 ° in this embodiment. That is, the strobe head unit 240 can be rotated by 120 ° in the vertical direction in the auto bounce drive for light emission photography. θL is the angle from the irradiation optical axis of the strobe light when the vertical head angle θ is 0 ° to the irradiation optical axis of the strobe light when the vertical head angle θ is in the heat radiation posture. The form is 150 °. That is, the strobe head unit 240 is rotatable in the vertical direction by 150 ° because it takes a heat radiation posture. The vertical head angle θ is described as the angle up to the optical axis of the strobe light when the head is in the heat radiation posture. The irradiation optical axis of light is a virtual optical axis.

  Next, the relationship between the angles described above will be described.

  In this embodiment, C (165 °) is larger than θK (120 °) and D (110 °) is larger than E (105 °), so that the second shielding portion 244 and the third heat dissipation hole are formed. 253 is provided and the angle of θK is set. By doing so, the third heat dissipation hole 253 is always covered with the exterior member 241 and is not exposed to the outside, so that it is possible to prevent foreign matter from entering the second space 254 from the outside.

  Further, the first shielding portion 243 and the second heat dissipation hole end 252a are provided so that F (140 °) becomes an angle larger than θK (120 °), and the angle of θK is set. By doing so, as shown in FIG. 6C, the second heat dissipation hole 252 is covered by the exterior member 241 and is not exposed to the outside even at the maximum movable angle θK in the automatic bounce drive, so that the second space 254 is not exposed. It is possible to prevent foreign matter from entering from the outside.

  On the other hand, the first shielding portion 243 and the second heat dissipation hole end 252b are provided so that θL (150 °) is larger than G (145 °), and the angle of θL is set. By doing so, as shown in FIG. 6D, the exterior member 241 retracts from the second heat dissipation hole 252 during the heat dissipation posture, so that the second space 254 is exposed to the outside. Further, the first heat dissipation hole 242 and the third heat dissipation hole 242 are arranged such that H (150 °) and θL (150 °) are equal to each other and J (10 °) is equal to or greater than I (5 °). 253 is provided. By doing so, as shown in FIG. 6D, the first space 245 and the second space 254 are connected by overlapping the third heat dissipation hole 253 and the first heat dissipation hole 242 in the heat dissipation posture. That is, a flow path for ventilating the air inside the first space 245 and the outside air is formed through the first heat dissipation hole 242, the opening formed by the third heat dissipation hole 253, and the opening formed by the second heat dissipation hole 252. It is possible to dissipate heat from the light emitting unit 202 and the first space 245. It should be noted that the heat radiation posture means that the temperature T of the light emitting unit 202 acquired by the temperature acquiring unit 210 is equal to or higher than a preset threshold value X when the strobe MPU 201 determines that the temperature of the light emitting unit 202 and the first light emitting unit 202. This is the posture taken to radiate the heat of the space 245. The control for shifting to the heat radiation posture will be described later.

  As described above, during normal shooting such as auto-bounce shooting, the inside of the strobe device 200 is shielded and the inside of the strobe device 200 is exposed to the outside only in the heat radiation posture. A structure capable of radiating heat from the portion 202 can be provided. In the present embodiment, the angles C to J, θK, and θL are set to the above-described values, but the values may be different from those of the present embodiment as long as the above-described angle relationship is satisfied. Note that a protective filter or the like that can ventilate the second heat dissipation hole 252 may be provided so that foreign matter can be prevented from entering from the outside even when the second space 254 is exposed to the outside during the heat dissipation posture. However, since the heat radiation is prioritized over the reduction of foreign matter intrusion, the effect of reducing foreign matter intrusion by the protective filter is lower than the effect of reducing foreign matter intrusion by the exterior member 241.

  Next, the operation of heat radiation control will be described with reference to FIG. FIG. 7 is a diagram showing a flowchart of heat dissipation control by the camera MPU 101 and the flash MPU 201. The processing of FIG. 7 is executed by the strobe MPU 201 when the power of the strobe device 200 is turned on, a program stored in a ROM or the like (not shown) of the strobe device 200 is expanded in a RAM (not shown). Further, a part of the processing is executed by the camera MPU 101 by expanding a program stored in a ROM (not shown) or the like of the camera 100 into a RAM (not shown).

  In step S701, the strobe MPU 201 determines whether the temperature T acquired by the temperature acquisition unit 210 is equal to or higher than a preset threshold X or lower than the preset threshold X. If the temperature T is lower than the threshold value X, the process proceeds to S702, and if it is equal to or higher than the threshold value X, the process proceeds to S704.

  In step S702, the camera MPU 101 determines whether the release switch 1 (SW1) 117a has been turned on. If SW1 is not turned on, the process proceeds to step S701. When the SW1 is turned on, steps S501 to S519 of the above-described photographing process are executed, and the process proceeds to step S703.

  In step S703, the flash MPU 201 determines whether or not the power-off input is made by the flash operating member 208. If it is turned off, the power of the strobe device 200 is turned off, and the flow is ended. If the off input has not been made, the process proceeds to step S701.

  In step S704, the strobe MPU 201 issues an instruction to the bounce drive controller 206 so that the vertical head angle θ becomes θL (150 °) as shown in FIG. To be changed to step S705.

  In step S705, the flash MPU 201 prohibits the flash device 200 from emitting light, and the process proceeds to step S706. In the light emission prohibiting process of step S705, the strobe MPU 201 may be controlled not to emit light even if it receives a light emission instruction from the camera 100 or the user. In addition, the camera 100 or the user may be notified of information indicating that the strobe MPU 201 is in a light emission prohibited state.

  In step S706, the strobe MPU 201 determines whether or not the power-off input is made by the strobe operation member 208. If it is turned off, the process proceeds to step S709, and if the off input is not made, the process proceeds to step S707.

  In step S707, the strobe MPU 201 determines whether the temperature T acquired by the temperature acquisition unit 210 is equal to or higher than a preset threshold X or lower than the preset threshold X. If the temperature T is lower than the threshold value X, the process proceeds to step S708, and if it is equal to or higher than the threshold value X, the process proceeds to step S705.

  In step S708, the flash MPU 201 issues an instruction to the bounce drive control unit 206 so that the vertical head angle θ becomes 0 °, and causes the flash device 200 to change to the shooting posture, and proceeds to step S702. In the present embodiment, the posture is changed so that the vertical head angle θ becomes 0 °, but if the posture is within the maximum movable angle θK (120 °) in the automatic bounce drive, the vertical head angle θ. May be an angle other than 0 °.

  In step S709, the strobe MPU 201 issues an instruction to the bounce drive control unit 206 so that the vertical head angle θ becomes 0 °, shifts the strobe device 200 to the shooting posture, and then powers the strobe device 200. Is turned off and the flow ends. In the present embodiment, the posture is changed so that the vertical head angle θ becomes 0 °, but if the posture is within the maximum movable angle θK (120 °) in the automatic bounce drive, the vertical head angle θ. May be an angle other than 0 °.

  It should be noted that the user feels annoyed when returning to the above-described flow after changing the vertical head angle by the user's manual operation during the heat radiation posture and changing to the heat radiation posture again in the determination of step S701. There is a fear. Therefore, when the vertical head portion angle is manually changed by the user, the above-described flow is not executed until the power-off input is made by the strobe operation member 208 next time. However, in that case, there is a concern that the temperature of the light emitting unit 202 will rise. Therefore, when the strobe MPU 201 detects the temperature rise of the light emitting unit 202, the light emission limitation that limits the light emission amount and the light emission interval is performed. Since the light emission restriction of the strobe device 200 is a known technique, its description is omitted.

  Further, in the flowchart shown in FIG. 7, the temperature threshold value (first threshold value) for changing the photographing posture to the heat radiation posture and the temperature threshold value (second temperature threshold) for changing the heat radiation posture to the photographing posture are the same. , Another value may be set. By setting the second threshold value to a value smaller than the first threshold value, the temperature becomes less than the threshold value, and after changing from the heat radiation posture to the shooting posture, the temperature rises above the threshold value with a slight temperature rise and immediately changes to the heat radiation posture. That is, so-called hunting can be suppressed.

  As described above, in the present embodiment, the heat dissipation holes and the shielding parts are provided in the strobe head part 240 and the bounce mechanism part 250 in a predetermined positional relationship, and the strobe device 200 is set in the heat dissipation posture based on the temperature of the light emitting part 202. change. By doing so, during normal shooting such as auto-bounce shooting, the inside of the flash device 200 can be exposed to the outside only during the heat radiation posture without exposing the inside of the flash device 200 to the outside. As a result, it is possible to provide a configuration capable of preventing foreign matter from entering from the outside and radiating heat from the light emitting unit 202. Further, since no member or mechanism dedicated to heat radiation is required, heat can be radiated without complicating the device.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.

200 Strobe device 201 Strobe MPU
202 light emitting part 206 bounce drive control part 210 temperature acquisition part 230 strobe body 240 strobe head part 241 exterior member 242 first heat dissipation hole 243 first shielding part 244 second shielding part 250 bounce mechanism part 251 exterior member 252 second heat dissipation hole 253 Third heat dissipation hole

Claims (11)

Body part,
A movable part having a light emitting part,
A connecting portion that rotatably connects the movable portion with respect to the main body portion;
Temperature acquisition means for acquiring the temperature of the light emitting unit,
Drive means for rotating the movable part with respect to the main body part;
Drive control means for controlling the drive means based on the temperature acquired by the temperature acquisition means,
The first exterior member, which is an exterior of the movable portion, is provided with a first hole portion on a surface facing the connecting portion,
The second exterior member, which is the exterior of the connecting portion, is provided with a second hole portion and a third hole portion on a surface facing the movable portion,
In the drive control means, when the temperature acquired by the temperature acquisition means is equal to or higher than a first threshold value, the second hole is not covered by the movable part and the third hole is the first hole. When the movable portion is rotated by the driving means so as to be in the first position overlapping with the temperature acquired by the temperature acquisition means is less than the second threshold value, the second hole portion and the third hole portion are provided. An illuminating device characterized in that the drive means rotates the movable part so that the hole is at a second position where the movable part is covered with the movable part. A light emission control means for controlling the light emitting unit,
The lighting device according to claim 1, wherein the light emission control means performs a light emission prohibition process on the light emitting portion when the position of the movable portion is the first position.   When the temperature acquired by the temperature acquisition unit is less than the second threshold value and the position of the movable unit is changed to the second position without using the driving unit, the control unit controls the movable unit. The illuminating device according to claim 1 or 2, wherein the movable portion is not rotated by the driving means so as to be at the first position.   The light emission control unit emits light when the temperature acquired by the temperature acquisition unit is less than the second threshold value and the position of the movable unit is changed to the second position without using the drive unit. The lighting device according to claim 3, wherein light emission of a part is restricted.   When the position of the movable portion is the second position, the inside of the first exterior member is opened through the opening formed by the first hole portion and the third hole portion and the opening formed by the second hole portion. 5. The lighting device according to claim 1, wherein a flow path for ventilating the air and the outside air is formed.   6. The illumination according to claim 1, wherein a rotation angle at which the movable portion is at the first position is larger than a rotation angle at which the movable portion is at the second position. apparatus.   7. The lighting device according to claim 1, wherein the main body portion has a connection portion that is connected to an image pickup device.   The lighting device according to claim 1, wherein the connecting unit includes a main capacitor that charges energy for causing the light emitting unit to emit light.   The lighting device according to claim 1, wherein the light source of the light emitting unit is a xenon tube.   The lighting device according to claim 1, wherein the light source of the light emitting unit is an LED. Body part,
A movable part having a light emitting part,
A connecting portion that rotatably connects the movable portion with respect to the main body portion;
Temperature acquisition means for acquiring the temperature of the light emitting unit,
Drive means for rotating the movable part with respect to the main body part;
Drive control means for controlling the drive means based on the temperature acquired by the temperature acquisition means,
The first exterior member, which is an exterior of the movable portion, is provided with a first hole portion on a surface facing the connecting portion,
A method for controlling an illumination device, wherein a second hole member and a third hole portion are provided on a surface facing the movable portion, in a second outer member which is an outer member of the connecting portion,
If the temperature acquired by the temperature acquisition unit is equal to or higher than a first threshold value, the second position is not covered by the movable part, and the third position overlaps with the first position. When the temperature obtained by the temperature obtaining means is less than the second threshold value, the second hole portion and the third hole portion are moved by the movable portion so that the movable portion is rotated by the driving portion. A method for controlling an illuminating device, characterized in that the movable part is rotated by the drive means so as to be in a second position covered by the.

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