JP2019140610A - Imaging apparatus - Google Patents

Abstract

To provide an imaging apparatus having an optimal cooling structure during non-photographing (energized state) time.SOLUTION: An intake port 4 or an exhaust port 3 for an air cooling fan 31 is disposed in the vicinity of a movable mechanism for moving a shoulder pad 2. The air-cooling fan 31 is rotated at high speed by detecting means for detecting a movement of the shoulder pad 2 detecting that the shoulder pad 2 moves from a first position to a second position. The air-cooling fan 31 is driven at a higher speed when the shoulder pad 2 is in the second position than when the shoulder pad is in the first position.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an imaging apparatus having a movable shoulder pad.

  Due to recent demands for downsizing of digital video cameras and other imaging devices, the layout space of the circuit board on which the image sensor is mounted and the main circuit board on which electronic components for processing control signals and image signals are mounted has been reduced. These substrates are arranged in a dense state. When the volume of the imaging device is not sufficiently large with respect to the heat generation amount, the cooling effect may be insufficient only by natural heat radiation. Therefore, a means for forming an air flow path around the heat source, mounting an air cooling fan, and cooling by forced air cooling has been proposed. There are many advantages compared to the cooling means based on heat conduction, such as a higher cooling effect.

  Further, in an imaging apparatus having a conventional shoulder pad, Patent Document 1 discloses cooling for the purpose of reducing the size of the main body and improving the design, and preventing dust and rainwater from entering the imaging apparatus. There has been proposed a fan exhaust port or intake port arranged around the shoulder pad mechanism.

  In addition, for example, a photographer such as a reporter cannot take down the imaging apparatus because he / she does not know when it is time to shoot. For this reason, the imaging apparatus is lifted and placed on the shoulder to take a break. However, since the imaging apparatus does not take this posture into consideration, both the arm and the shoulder become tired. Therefore, Patent Document 2 proposes an imaging apparatus having a structure in which a shoulder pad can be moved.

  In addition, an image pickup apparatus used by a photographer such as a reporter must be in a power-on state even when the photographer takes a break so that shooting can be started immediately even during standby. If the image pickup apparatus is always turned on, the image pickup apparatus becomes higher in temperature, and the cooling effect may be insufficient.

JP 2006-128749 A Japanese Patent Laid-Open No. 11-284892

  However, when the air-cooling fan of the imaging device that is taking a picture is driven at a higher speed, noise or the like may become a problem. In addition, when the opening of the exhaust port or the intake port is widened, there is a problem that the possibility that dust or rainwater enters the imaging apparatus increases.

  In view of the above problems, an object of the present invention is to provide an imaging apparatus having an optimal cooling structure during non-shooting (energized state).

  The present invention has been made in order to solve the above-described problems, and includes an imaging unit that captures an image of a subject with an imaging device, an air cooling fan for forced air cooling, and a control unit that controls the rotational speed of the air cooling fan; A duct for passing air using the air cooling fan, and a shoulder pad for protecting a photographer's shoulder configured to be movable between a first position used during photographing and a second position used during standby. Detecting means for detecting movement of the shoulder pad, and an air inlet or exhaust port for the air-cooling fan is disposed in the vicinity of the movable mechanism for moving the shoulder pad. The air-cooling fan is driven at a higher speed when in the second position than when in the first position.

  According to the present invention, it is possible to provide an imaging apparatus having an optimal cooling structure during non-photographing (energized state).

Block diagram of imaging device 1 External view of the imaging device 1 when the shoulder pad 2 is in the first position External view of the imaging device 1 when the shoulder pad 2 is in the first position External view of imaging device 1 when shoulder pad 2 is in the second position External view of imaging device 1 when shoulder pad 2 is in the second position The figure which shows the imaging | photography posture at the time of imaging | photography in the Example of this invention. The figure which shows the rest posture at the time of the non-photographing in the Example of the present invention Sectional drawing of an imaging device when the shoulder pad 2 is in the first position Left side sectional view of the imaging device when the shoulder pad 2 is in the second position Cross-sectional perspective view of the imaging device when the shoulder pad 2 is in the second position The flowchart which shows the flow of rotation speed control of the air cooling fan 31. Sectional drawing which looked at imaging device 1 from the upper surface side External view of shoulder pad 2 Sectional drawing which looked at imaging device 1 from the front side

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings by applying the present invention to an imaging apparatus. In the imaging apparatus according to the present embodiment, the surface viewed from the object side is the front surface, the surface facing the front surface is the back surface, the right surface when viewed from the front surface is the right surface, and the left surface when viewed from the front surface is the left surface. The upper surface as viewed from above is referred to as the upper surface, and the lower surface as viewed from the front is referred to as the lower surface. In addition, regarding description, it demonstrates centering on the part relevant to this invention, the part which is not directly related to invention is not shown in figure and description is abbreviate | omitted.

(Block Diagram)
Embodiments of the present invention will be described below.
FIG. 1 is a block diagram illustrating a configuration of an imaging apparatus 1 according to the first embodiment of the present invention. As shown in FIG. 1, the imaging apparatus 1 includes a lens unit 30, a light amount adjustment unit 41, a sensor unit 38, a main body control unit 40, an air cooling fan 31, a shoulder pad 2, a detection switch 33, a power supply unit 42, and an operation unit 39. The display unit 43 and the like.

  The subject light incident on the lens unit 30 passes through the light amount adjustment unit 41, forms an image on the image sensor of the sensor unit 38, and is photoelectrically converted. The operation unit 39 includes, for example, a recording start switch that is operated by the photographer. When the operation unit 39 is operated, the information is transmitted to the main body control unit 40, and the main body control unit 40 performs photographing control such as recording start based on the operation information.

  The main body control unit 40 performs information processing represented by image / audio information input / output, image processing such as compression / conversion, recording / playback processing such as recording / playback, and the like. When image information is output from the sensor unit 38 to the main body control unit 40, the main body control unit 40 performs information processing such as image processing on the image information. The main body control unit 40 controls the lens unit 30 according to the transmitted image information, for example, by operating the aperture unit and adjusting the brightness of the captured image. When recording a captured image, the main body control unit 40 transmits image information to the recording medium 45 to record the captured image.

  The light amount adjusting unit 41 includes a switchable ND filter and the like. The display unit 43 displays image information based on an instruction from the main body control unit 40. The shoulder pad 2 has a detection switch contact portion 2a for the detection switch 33, a vibrator 2f, and the like. The detection switch 33 detects whether the shoulder pad 2 is in the first position or the second position based on the contact state of the shoulder pad 2 with the detection switch contact portion 2a. Details of the detection switch contact portion 2a, the first position, and the second position will be described later.

  Information on whether the shoulder pad 2 is in the first position or the second position is transmitted to the main body control unit 40, and based on this information, the main body control unit 40 determines the rotational speed of the air cooling fan 31. Drive control is performed. The main body control unit 40 operates the aperture unit of the lens unit 30 based on the above information. The main body control unit 40 switches the light amount adjustment unit 41 based on the above information. Further, the main body control unit 40 switches whether or not the operation unit 39 can be operated based on the above information. Further, the main body control unit 40 switches display contents of the display unit 43 and turns on / off the power based on the above information.

  The power supply unit 42 includes a DC terminal, a battery terminal, and the like. At the DC terminal, it is possible to obtain power from an external power source via an external power cable. Further, at the battery terminal, electric power can be obtained from the battery of the power supply unit. The electric power obtained by the power supply unit 42 is transmitted to the main body control unit 40. After the voltage conversion is performed by the main body control unit 40 to a voltage suitable for each driving element, the power is transmitted to each driving element as a power source for each driving element. The

(Description of appearance of imaging device when shoulder pad is in first and second positions)
2-1 (a) is an external perspective view of the imaging device 1 when the shoulder pad 2 is in the first position, FIG. 2-1 (b) is a front view, and FIG. (C) is a left side view. FIG. 3A is an external perspective view of the imaging device 1 when the shoulder pad 2 is in the second position, as viewed from the left side, and FIG. It is the external appearance perspective view which looked, and FIG. 3-2 (c) is the figure seen from the front lower side. As shown in FIGS. 2-1 (a), (b), FIG. 2-2 (c) and FIGS. 3-1 (a), (b), and FIG. 3-2 (c), the imaging device 1 It has a movable shoulder pad 2, an exhaust port 3, an intake port 4, and the like.

  Here, as shown in FIGS. 2-1 (a), (b), 2-2 (c) and FIGS. 3-1 (a), (b), and FIG. 3-2 (c), shoulder pads The pad 2 is disposed on the lower surface side of the imaging device 1 and rotates back and forth as shown in the figure. In the present embodiment, the shoulder pad 2 is rotationally moved, but the movable system such as translation is not limited to this. In addition, since the movable mechanism of the shoulder pad 2 is a well-known technique, description is abbreviate | omitted.

  Further, the air inlet 4 is disposed on the left side surface portion. Further, as shown in FIG. 3B, the exhaust port 3 is located in the vicinity of the movable mechanism of the shoulder pad 2 and has a structure for exhausting air from the location. In this embodiment, the exhaust port 3 is disposed near the movable mechanism of the shoulder pad 2 and the intake port 4 is disposed on the left side surface. However, the intake port is disposed near the movable mechanism of the shoulder pad 2 and the exhaust port is exhausted on the left side surface. A mouth may be placed.

(Explanation of shooting posture during shooting)
FIG. 4 is a diagram showing a shooting posture at the time of shooting. As shown in FIG. 4, the photographer is positioned below the imaging device 1, and the imaging device 1 is stabilized by placing the shoulder pad 2 in the first position on the right shoulder 21, and the right hand 22. Then, photographing is performed in a state where the grip portion 37 formed on the left side surface portion of the front lens portion 30 of the imaging device 1 is supported by the right hand 22.

  In this state, since the grip portion 37 supports the weight of the front side of the imaging device 1, the right arm 23 becomes tired. Therefore, when shooting is performed for a long time, the burden on the photographer becomes very large. In this embodiment, a right-handed photographer is assumed, but the present invention is not limited to this.

(Explanation of resting posture when not shooting)
FIG. 5 is a diagram showing a resting posture when not photographing. As described above, since the burden on the photographer during photographing is very large, the lens unit 30 is pushed upward in front of the imaging device 1 when not photographing, and the center of gravity of the imaging device 1 is brought close to the shoulder pad 2 so that the imaging device 1 In many cases, the image pickup apparatus 1 is supported by the photographer's right shoulder 21 to reduce the burden on the photographer's right arm 23.

  As shown in FIG. 5, the imaging apparatus 1 has a structure in which the shoulder pad 2 is rotated and moved to the second position as the lens unit 30 is directed upward. Thereby, even if the imaging device 1 is tilted, the shoulder pad 2 is firmly in contact with the right shoulder portion 21 of the photographer, and the photographer can take a rest in a stable state.

(Explanation of the sectional view of the imaging device of the present invention when the shoulder pad is in the first and second positions)
FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a cross-sectional view taken along the line B-B in FIG.

  As shown in FIGS. 6 and 7, an air cooling fan 31 is disposed in the vicinity of the exhaust port 3. A motor unit (not shown) that is electrically connected to a main body control unit 40 (not shown) is held inside the air cooling fan 31. A pressure difference is generated by rotating the blades to send air. . The air cooling fan 31 is provided with a Hall element (not shown) and a magnet (not shown) on the blade, and has means for detecting the rotation speed of the blade and performing feedback control.

  With the above configuration, the air cooling fan 31 has a function of sucking air from the suction side and discharging it from the discharge side, and can control the rotation speed. The air cooling fan 31 is connected to the duct 32. The duct 32 has an intake portion and an exhaust portion. The intake portion is connected to the intake port 4, and the exhaust portion is connected to the exhaust port 3. The air from the outside of the imaging device 1 is sent into the duct 32. The exhaust port 3 exhausts air. An arrow 44 indicates the air flow when the air cooling fan 31 is driven.

  As described above, the air sucked from the intake port 4 arranged on the left side surface portion of the imaging device 1 is carried in the back direction by the duct 32 bent in an L shape. Details of the L shape will be described later together with details of cooling the heat source. Further, the duct 32 is bent in an L shape toward the lower surface in the vicinity of the shoulder pad 2 and is connected to the suction side of the air cooling fan 31 at the end. Thereafter, the air discharged from the discharge side of the air cooling fan 31 is exhausted from the gap between the main body of the imaging device 1 and the shoulder pad 2 as shown in FIG. By adopting such a structure, it is possible to suppress the possibility of entry of dust and rainwater into the imaging device 1.

  As shown in FIG. 7, when the shoulder pad 2 is in the second position, the gap between the exhaust port 3 and the shoulder pad 2 is widened. As a result, the exhaust opening for forced air cooling is widened, and the cooling structure can efficiently perform intake / exhaust with respect to the inside of the imaging apparatus 1. Details of the cooling of the heat source will be described later.

(Description of detection means for detecting that the shoulder pad is in the second position)
FIG. 8 is a perspective view of the CC cross section of FIG. 3-2 (c), and shows a cross section of the imaging device 1 when the shoulder pad 2 is in the second position. As shown in FIG. 8, as the shoulder pad 2 moves from the first position to the second position, the detection switch contact portion 2 a of the shoulder pad 2 contacts the detection switch 33. Thus, it is structured to detect that the shoulder pad 2 is in the second position.

(Explanation of the flow chart showing the flow of rotation speed control of the air cooling fan by the position of the shoulder pad)
FIG. 9 is a flowchart showing the flow of the rotational speed control of the air cooling fan 31 depending on the position of the shoulder pad 2. Hereinafter, each step will be described.
S101: It is determined whether or not the shoulder pad 2 is at the second position by the detection switch 33 described above.
S102: When it is determined in S101 that the shoulder pad 2 is in the second position, the air cooling fan 31 is rotated at high speed by the control means for controlling the rotation speed of the air cooling fan 31.
S103: When it is determined in S101 that the shoulder pad 2 is not in the second position, the air cooling fan 31 is normally rotated by the control means for controlling the rotation speed of the air cooling fan 31.
S104: Determine whether or not to continue. If it is continued, the process returns to S101. If you do not continue, it will end.

  From the above, for example, when the shoulder pad 2 is moved from the first position to the second position, the air cooling fan 31 is switched from the normal rotation to the high speed rotation. When the shoulder pad 2 is in the first position, the air-cooling fan 31 is normally rotated, so that noise or the like does not become a problem during photographing, and the imaging device 1 can be cooled during a break.

  6 and 7, when the shoulder pad 2 of the imaging apparatus 1 is moved from the first position to the second position, the exhaust opening for forced air cooling is widened. It has become. Therefore, when the shoulder pad 2 is in the second position, the air cooling fan 31 is driven at a high rotation speed, and when the air flow becomes high, the exhaust opening is widened, and the imaging device 1 is efficiently cooled. Can be done. With these configurations, the imaging apparatus 1 is efficiently cooled during the resting posture.

(Detailed explanation of heat source cooling)
FIG. 10 is a DD cross section of FIG. 2-1 (b), and occupies a cross section of the imaging device 1 viewed from above. An arrow 44 indicates the air flow when the air cooling fan 31 is driven. As shown in FIG. 10, the air inlet 4 is arranged on the front left side surface portion of the imaging device 1. Then, intake is performed in the direction substantially perpendicular to the optical axis at the intake port 4. Next, the duct 32 is bent in an L shape from the air inlet 4 toward the rear of the imaging device 1. As shown in FIGS. 6 and 7, the duct 32 has a shape that is bent in an L shape further downward toward the exhaust port 3.

  Here, as shown in FIG. 10, a first heat source 34, a second heat source 35, and a third heat source 36 are arranged on each of the three surfaces of the duct 32. The first heat source 34 in the embodiment of the present invention is a sensor unit 38. In the sensor unit 38, the power consumption of the image sensor increases and the amount of heat generated also increases as the captured image of the imaging device 1 becomes higher in image quality. Since the performance of an image sensor generally decreases as the temperature rises, it is necessary to dissipate heat generated by the image sensor. The sensor portion 38 transfers heat to the front portion of the duct 32 using a heat radiating rubber (not shown).

  The second heat source 35 in the embodiment of the present invention is a main substrate. Since the main board is electrically connected to all electronic devices, it is a board having a large area in the imaging apparatus 1 on which many ICs are mounted. The main board is mounted with a front-end IC for processing signals from the sensor unit 38, a video processing IC for performing processing such as color adjustment on the video, etc., and is a block diagram shown in FIG. It has the function of the main body control unit 40 explained in the above. Since front-end ICs, video processing ICs, etc. are particularly large power consuming ICs that generate extremely heat, they are mounted on the duct 32 side, and heat from the IC is transferred to the duct 32 using heat radiation rubber (not shown). Yes. Illustration of the main substrate shape and IC layout is omitted.

  The third heat source 36 in the embodiment of the present invention is a sub-board. On the sub-board, a back-end IC that converts the video format optimum for each external input / output and a format conversion IC, such as those with relatively large power consumption, are mounted on the main body duct 32 side. The heat of the IC is transferred to the duct 32 by using a heat radiating rubber (not shown). Illustration of the shape of the sub-board and IC layout is omitted. Thereby, the 1st heat source 34, the 2nd heat source 35, and the 3rd heat source 36 can be cooled by cooling the duct 32. FIG.

Fins are formed inside the duct 32 to exchange heat with air. As described above, the intake portion of the duct 32 is connected to the intake port 4, and the exhaust portion is connected to the exhaust port 3. For this reason, the air heated by heat exchange can be discharged from the imaging apparatus 1 by driving the air cooling fan 31.
With such a configuration, the heat generated by the first heat source 34, the second heat source 35, and the third heat source 36 can be efficiently exhausted. In this embodiment, the number of heat sources is limited to three. However, the present invention is not limited to this, and the arrangement of the heat sources is not limited.

(Explanation of shoulder pad)
FIG. 11 is an external view of the shoulder pad 2. The shoulder pad 2 includes a cushion portion 2b made of a heat insulating member, a movable shaft 2c, an opening 2d in the movable shaft 2c, and a standing wall portion 2e in the movable shaft 2c. For this reason, even if the movable shaft 2c is made of a metal member, since the cushion portion 2b is made of a heat insulating member, heat is not transmitted to the photographer.

(Explanation of the sectional view of the imaging device of the present invention when the shoulder pad is in the first position)
FIG. 12 is a cross-sectional view taken along the line E-E in FIG. An arrow 44 indicates the air flow when the air cooling fan 31 is driven. As shown in FIG. 12, the movable shaft 2c has a structure in which the opening 2d is disposed on the lower surface of the exhaust port 3, and the left and right side surfaces are closed by the standing wall 2e. Therefore, when the shoulder pad 2 is in the first position, the warm air exhausted from the exhaust port 3 is exhausted in the front direction and the back direction after passing through the opening 2d as shown in FIG. The Rukoto.

  When the shoulder pad 2 is in the second position, the warm air exhausted from the exhaust port 3 passes through the opening 2d and is exhausted to the back as shown in FIG. Become. As described with reference to FIGS. 4 and 5, the photographer is located in the side surface direction of the imaging apparatus 1, and warm air is not blown to the photographer by the standing wall 2 e. As a result, the photographer does not feel uncomfortable because the hot air continues to hit, and can continue shooting comfortably.

  As described above, according to the present invention, by driving the air cooling fan 31 at a high speed, there is a low possibility that noise or the like becomes a problem in the shooting state, and dust or rainwater can enter the imaging apparatus 1. Provided is an imaging device having an optimal cooling structure in a non-shooting state (energized state) in which the warm air generated by the cooling of the imaging device 1 is low and the photographer is less likely to be blown and can be taken comfortably. can do.

DESCRIPTION OF SYMBOLS 1 Imaging device 2 Shoulder pad 3 Exhaust port 4 Intake port 21 Right shoulder 22 Right hand 23 Right arm 30 Lens part 31 Air-cooling fan 32 Duct 33 Detection switch 34 First heat source 35 Second heat source 36 Third heat source 37 Grip part 38 Sensor part 39 Operation part 40 Main body control part 41 Light quantity adjustment part 42 Power supply part 43 Display part 44 Arrow 45 Recording medium

Claims (4)

Imaging means for photographing a subject with an imaging element;
An air cooling fan for forced air cooling,
Control means for controlling the rotational speed of the air cooling fan;
A duct for passing air using the air cooling fan;
A shoulder pad for protecting a photographer's shoulder configured to be movable between a first position used during shooting and a second position used during standby;
Detecting means for detecting movement of the shoulder pad,
An air intake or exhaust port for the air cooling fan is disposed in the vicinity of the movable mechanism for moving the shoulder pad,
An imaging apparatus, wherein the air cooling fan is driven at a higher speed when the shoulder pad is in the second position than when the shoulder pad is in the first position. The imaging apparatus according to claim 1, wherein when the shoulder pad is in the second position, the opening of the intake port or the exhaust port is wider than when the shoulder pad is in the first position. The exhaust air is exhausted in substantially the same direction as the movement direction of the shoulder pad when the air cooling fan is driven, and is not exhausted in a direction substantially perpendicular to the movement direction of the shoulder pad. 2. The imaging device according to any one of 2. The imaging apparatus according to claim 1, wherein the shoulder pad is formed of a movable shaft and a cushion portion that contacts the shoulder of the photographer.