JP7005316B2 - System camera - Google Patents

Description

The present invention relates to a camera and a system camera including a cooling module and an expansion module that are detachably attached to the camera.

A digital video camera or the like has a series of functions such as an image pickup function, a power supply function, an electronic circuit that acquires image pickup data and performs predetermined processing, a recording function, a display function, and a user interface. On the other hand, in recent years, system cameras that use an expansion module equipped with functions such as power supply function, recording function, and display function are attached to a camera that has only an imaging function and an electronic circuit that acquires imaging data and performs predetermined processing. exist.

In general, the expansion module specializes in one function, and in many cases, a plurality of types of expansion modules having the functions required for the system are selected and attached to the camera. In addition, there are system cameras in which an expansion module is additionally attached to the camera to improve the performance of some functions. Such a system camera is convenient for the user because the performance of each function can be adjusted according to the usage pattern and the expansion module can be replaced when some of the functions have improved performance.

By the way, it is expected that the power consumption of such a system camera will change according to the usage pattern and the power consumption will increase due to the improvement of the performance of each function. Therefore, a cooling means corresponding to the usage pattern of the camera is required. To solve such a problem, there is a case where a camera and an expansion module are stacked and arranged in the optical axis direction, and at least one of the expansion modules is provided with a cooling unit.

Special Table 2012-514391A Gazette

However, in Patent Document 1, when each expansion module is configured to cool the expansion module itself by a cooling unit, the cooling unit is provided even when the cooling means is unnecessary, for example, in a low temperature environment. It will be a redundant system.

Therefore, an object of the present invention is to provide a system camera that can be used comfortably by a user while maintaining the rigidity of the entire system while avoiding an increase in the size of the camera.

In order to achieve the above object, the system camera of the present invention has at least one surface provided with a first vent, and heat can be exchanged between the inside and the outside through the first vent. A camera having a first flow path including the first vent, a fan unit detachably attached to the camera, a base portion for holding the fan unit, and a first unit . A system camera comprising a cooling module having a shielding portion and an expansion module that is detachably attached to the camera to expand the functions of the camera, wherein the expansion module is provided with a second vent. The cooling module has a surface, is capable of heat exchange between the inside and the outside through the second vent, and has a second flow path including the second vent. In the state of being mounted on the camera , the fan unit is arranged so as to be superimposed on a part of the first vent, and the first shielding portion is not the fan unit of the first vent. By shielding at least a part of the overlapping region, the first flow path becomes a forced air cooling flow path , and when the cooling module and the expansion module are mounted on the camera, the first shielding portion is the said. It is characterized in that it is arranged between the camera and the expansion module, and the fan unit is arranged so as to straddle the first flow path and the second flow path .

According to the present invention, it is possible to provide a system camera that can be comfortably used by a user by maintaining the rigidity of the entire system while avoiding the increase in size of the entire system due to the mounting of the cooling module.

It is a conceptual diagram of the system camera which concerns on 1st Embodiment of this invention. It is a conceptual diagram explaining the periphery of the heat dissipation part 6 of a cooling module, a heat dissipation part of a camera, and an expansion module. It is a figure explaining the role of a shielding part. It is a perspective view which shows the camera alone which constitutes the system camera. It is a perspective view which disassembled a part of a camera. It is a perspective view which shows the expansion module. It is a perspective view which disassembled a part of an expansion module. It is an exploded perspective view of a cooling module. It is a perspective view which shows the cooling module. It is sectional drawing which shows the cooling module which held the fan unit in a 2nd position, and was partially cut away. It is a perspective view which shows the state which attached the cooling module to a camera. It is a perspective view which a part of a camera unit was broken. It is a perspective view which shows the state which attached the expansion module to a camera. It is an exploded perspective view which shows the procedure of attaching an expansion module and a cooling module to a camera. It is a perspective view which shows the state which attached the expansion module and the cooling module to a camera. It is a perspective view which shows the cooling module of the system camera which concerns on 2nd Embodiment of this invention. It is an exploded perspective view of a cooling module. It is the figure which looked at the cooling module from the top. It is a perspective view which shows the case where the cooling module is attached to the camera. It is a perspective view which shows the state which attached the expansion module and the cooling module to a camera. It is a conceptual diagram which shows the periphery of the cooling module and the heat dissipation part of the system camera which concerns on 3rd Embodiment of this invention. It is a perspective view of a camera. It is a perspective view which shows the cooling module. It is a perspective view of an expansion module. It is a perspective view which shows the state which attached the cooling module to a camera. It is a perspective view which shows the procedure of attaching an expansion module and a cooling module to a camera. It is a perspective view which shows the state which attached the expansion module and the cooling module to a camera.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
FIG. 1A is a conceptual diagram of a system camera according to the first embodiment of the present invention. FIG. 1A shows a system camera in which an expansion module 4 and a cooling module 5 are mounted on a digital video camera 1 (hereinafter referred to as a camera 1). The user can add functions according to the usage pattern of the system camera by mounting and electrically connecting a plurality of types of expansion modules. In addition, the power consumption of the system camera changes depending on the usage pattern and operation mode.

Therefore, the cooling module 5 can be attached to suppress the temperatures of the camera 1 and the expansion module 4 to the specified temperature or lower. The expansion module 4 has, for example, a recording function for recording image pickup data transmitted from the camera 1, a power supply function for the camera 1, an operation means for the user to operate the camera 1, and a connection with other electronic devices. There is an interface etc. Further, there is a display function for displaying the image pickup data transmitted from the camera 1, but in the present embodiment, it will be described as a recording module.

In the usage mode of FIG. 1A, the video data is not recorded in the recording unit 13 in the camera 1, but is output to the expansion module 4 for recording. For example, it is suitable for recording a large amount of data that requires high-load processing such as a high bit rate video for a long time.

FIG. 1B is a conceptual diagram showing a state of a single camera 1 without the expansion module 4 and the cooling module 5 attached. The use of the camera 1 alone is suitable for recording a small amount of data in the recording unit 13 provided inside the camera 1.

FIG. 1C is a conceptual diagram showing a case where the expansion module 4 is not attached to the camera 1 and the cooling module 5 is attached. FIG. 1C is suitable for recording video data in a recording unit 13 provided inside the camera 1 for a short time and simultaneously executing high-load processing. For example, when recording high bit rate video data for a short time. FIG. 1 (c) can be applied to a system camera having no expansion module and consisting of a camera 1 and a cooling module 5.

FIG. 1D is a conceptual diagram showing a case where the expansion module 4 is attached to the camera 1 without attaching the cooling module 5. In FIG. 1D, video data is output from the camera 1 to the expansion module 4 and recorded, but it is suitable when cooling is not required due to shooting in a low temperature environment or the like.

Returning to FIG. 1A, the configuration and basic operation of the system camera will be described. A lens barrel 2 including a lens 21 is provided on the front side of the camera 1. The lens barrel 2 may be attached to and detached from the camera 1 by a mounting method such as a bayonet, or may be provided integrally with the camera 1.

Further, the camera 1 has an image sensor 22, a flexible substrate 11, a substrate 12, a recording unit 13, a power supply unit 14, and a heat dissipation unit 16. The image pickup element 22 converts the optical information transmitted through the lens 21 to form an image into an electric signal, and transfers the optical information to the substrate 12 via the flexible substrate 11.

The substrate 12 executes processing such as sending an electric signal sent from the image pickup element 22 to the recording unit 13 and recording the signal. The power supply unit 14 supplies power for carrying out the above process. The recording unit 13 is composed of a recording medium such as a memory card that can be attached to and detached from the camera 1. The recording medium has a small capacity and is not suitable for recording a large amount of data for a long time.

Therefore, when recording a large amount of data, the expansion module 4 is detachably attached to the back side of the camera 1, and the data is output from the camera 1 to the expansion module 4 and recorded in the expansion module 4. The expansion module 4 receives an electric signal processed by the substrate 12 and transmits it to the substrate 42 in the expansion module 4 via an external interface (not shown in FIG. 1).

The board 42 sends the received electric signal to the recording unit 43 in the expansion module 4 to execute the recording process. The heat dissipation unit 16 of the camera 1 dissipates heat generated from the substrate 12. The heat dissipation unit 46 of the expansion module 4 dissipates heat generated from the substrate 42.

The thick broken line portion in the figure of the heat radiating unit 16 and the heat radiating unit 46 indicates the location of the ventilation holes provided on the exterior covers of the camera 1 and the expansion module 4, respectively. This vent exchanges heat between the inside and outside of the device. The relationship between the cooling module 5, the heat radiating unit 16 and the heat radiating unit 46 will be described later with reference to FIG.

FIG. 2 is a conceptual diagram illustrating the periphery of the cooling module 5, the heat radiating unit 16 of the camera, and the heat radiating unit 46 of the expansion module 4. FIG. 2A is a diagram showing a state in which the expansion module 4 and the cooling module 5 are attached to the camera 1, and FIG. 2B is a diagram showing a state of the camera 1 alone in which the expansion module 4 and the cooling module 5 are not attached. .. FIG. 2C is a diagram showing a state in which the expansion module 4 is not attached to the camera 1 and the cooling module 5 is attached.

As shown in FIG. 2A, the heat radiating portion 16 of the camera 1 is provided on the vent hole 161 provided on the upper surface of the camera 1, the vent 162 provided on the back surface of the camera 1, and the bottom surface of the camera 1. It is provided with a vent 163 and a duct 164. The duct 164 may be arranged with a fin shape or a pin shape for increasing heat transfer efficiency.

Elements 121 to 123 that execute predetermined processing are mounted on the substrate 12. The elements 121 to 123 serve as a main heat source during camera operation, and the heat of the elements 121 to 123 is transferred to the duct 164 and discharged to the vents 161 to 163 and the space 166 formed by the duct 164.

On the other hand, the heat dissipation portion 46 of the expansion module 4 includes a vent 461 provided on the upper surface of the expansion module 4, a front portion 462 which is a heat dissipation surface of the expansion module 4, a vent 463 provided on the bottom surface of the expansion module 4, and a duct. It has 464. The duct 464 may be provided with a fin shape or a pin shape for increasing heat transfer efficiency.

Elements 421 to 423 that execute recording processing on the recording unit 43 are mounted on the substrate 42. The elements 421 to 423 serve as a main heat source during the operation of the expansion module 4. The heat of the elements 421 to 423 is transferred to the duct 464 and released to the space 466 formed by the vent 461, the front surface portion 462, the vent 464, and the duct 464.

The expansion module 4 is fixed to the camera 1 so that the front surface portion 462 faces the vent 162 on the back surface of the camera 1.

The cooling module 5 has a base portion 51, a shielding portion 52, and a fan unit 53. The shielding portion 52 is arranged adjacent to the vent 162 of the camera 1 and shields the vent 162. The details of the shielding portion 52 will be described later with reference to FIG.

The fan unit 53 is installed so as to be able to transition between the first position and the second position with respect to the base portion 51. Here, as shown in FIG. 2A, the first position is a position where the position of the shielding portion 52 substantially coincides with the center of the fan unit 53. Further, as shown in FIG. 2C, the second position is a position where the end portion of the fan unit 53 substantially coincides with the shielding portion 52 and the fan unit 53 does not become convex with respect to the shielding portion 52. ..

The fan unit 53 includes an axial fan 531 and generates the airflow of arrow A in FIG. 2A and the airflow of arrow C in FIG. 2C. The base portion 51 has an opening 5111 on the surface side to which the fan unit 53 is attached, and has an opening 5112 on the surface side to be attached to the camera 1. The opening 5112 is arranged directly above the vent 161.

Returning to FIG. 2A, at the first position, the fan unit 53 is arranged so as to straddle the space 166 and the space 466, and a forced air cooling flow path is formed in both the heat radiation unit 16 and the heat radiation unit 46. The elements 121 to 123 and the elements 421 to 423 are cooled.

At this time, the fan unit 53 covers a part (region X1) of the opening 5111 described later in FIG. The shielding portion 532 divides the overlapping region (region X1) and the non-superimposing region (region X2), and prevents the inflow of outside air into the forced air cooling flow path formed by the shielding portion 532 and the heat radiating portion 16 (arrow). Y).

As shown in FIG. 2B, in the case of the camera 1 alone, the elements 121 to 123 are cooled by natural air cooling. In the case of natural air cooling, it is desirable that the outside air can be supplied to the vicinity of the heat source of the camera 1. In the present embodiment, the outside air B can be supplied to the vicinity of the heat source from the vent 162.

As shown in FIG. 2C, when the expansion module 4 is not mounted on the camera 1 and the cooling module 5 is mounted, the fan unit 53 is arranged at a second position so as not to protrude from the shielding portion 52. In this state, the shielding portion 52 shields the ventilation port 162, and a forced air cooling flow path C having the ventilation port 163 as an intake port and the ventilation port 161 as an exhaust port is formed. At this time, the fan unit 53 covers the entire opening 5111.

Therefore, it is possible to suck up the entire axial flow fan 531, and the axial flow fan 531 is rotated at a lower speed than in FIG. 2A to reduce noise, or the cooling efficiency for the camera 1 is increased to be higher. It is possible to operate the load.

Next, the role of the shielding unit 52 will be described with reference to FIGS. 2 (c) and 3. If there is no shielding portion 52, even if the fan unit 53 generates an air flow in the direction of arrow A in FIG. 3, air is taken in from the vicinity of the ventilation port 161 of the ventilation port 162 (air flow D), and the elements 121 to 123 cannot be cooled.

As shown in FIG. 2C, the shielding portion 52 closes the ventilation port 162 to form a forced air cooling flow path C having the ventilation port 163 as an intake port and the ventilation port 161 as an exhaust port. As a result, the outside air passes near the heat radiating portion of the elements 121 to 123, and the elements 121 to 123 can be efficiently cooled.

FIG. 4 is a perspective view showing a single camera 1 constituting the system camera. A vent 161 is provided on the upper surface of the camera 1, a vent 162 is provided on the back surface, and a vent 163 is provided on the bottom surface. Further, on the back surface of the camera 1, an external interface 151 is provided at a position outside the vent 162. An external interface 152 for communicating with the cooling module 5 is provided on the upper surface of the camera 1.

The fixing portions 171 and 173 are fixing portions of the expansion module 4, and are described as screw fastening portions for screwing screws in the optical axis direction in the present embodiment. The fixing portion 172 is a fixing portion of the cooling module 5, and is described as a screw fastening portion for screwing a screw from the upper surface in the present embodiment.

FIG. 5 is an exploded perspective view of a part of the camera 1. Elements 121 to 123, which are the main heat sources during the recording operation, are mounted on the substrate 12, and the elements 121 to 123 come into contact with the duct 164. In the duct 164, heat radiation fins 1641 for increasing heat transfer efficiency are arranged from the vent 163 toward the vent 161.

FIG. 6 is a perspective view showing the expansion module 4. A vent 461 is provided on the upper surface of the expansion module 4, and a vent 463 is provided on the bottom surface of the expansion module 4. Further, the fixing portions 471 and 473 are fixing portions for fixing the expansion module 4 to the camera 1. In the present embodiment, the screw bearing surface for screwing the screw in the optical axis direction will be described, but the present invention is not particularly limited as long as it is a means corresponding to the fixing method on the camera 1 side.

The front surface portion 462 is provided with an external interface 45 that communicates with the external interface 151 of the camera 1. The communication method of the external interface 45 is known as the communication method of the external interface 151, and details thereof will be omitted.

FIG. 7 is an exploded perspective view of a part of the expansion module 4. Elements 421 to 423, which are the main heat sources during shooting and recording, are mounted on the substrate 42, and the elements 421 to 423 come into contact with the duct 464. The duct 464 is provided with heat radiation fins 4641 for increasing heat transfer efficiency from the vent 463 toward the vent 461.

FIG. 8 is an exploded perspective view of the cooling module 5. A shielding portion 52 extends from the base portion 51, and an opening portion 521 is provided in the shielding portion 52. The upper surface of the base portion 51 has an opening 5111, and the lower surface has an opening 5112. The fan unit 53 is provided with a shielding portion 532. The role of the shielding portion 532 will be described later with reference to FIG.

The fan unit 53 is held in the first position by the convex portion 533 abutting on the regulating portion 5122 and the click spring 534 protruding from the fan unit 53 and charging in the convex direction abuting on the regulating portion 5123. Further, the fan unit 53 is held in the second position by the convex portion 533 abutting on the regulating portion 5121 and the click spring 534 abutting on the regulating portion 5122.

The external interface 552 is an interface for communicating with the camera 1. Power and control signals are sent from the external interface 552 via the flexible substrate 54, whereby the axial flow fan 531 fixed to the fan unit 53 rotates, and an air flow in the direction of arrow A is generated. The external interface 552 includes a plurality of terminals for transmitting and receiving electric power and control signals, and specifically, a reference voltage, GND, PWM1, FG1, PWM2, and FG2 are arranged from the ends.

PWM (Pulse Width Modulation) is an input signal that conveys the DUTY ratio for externally performing PWM control of the axial fan 531. The FG (Frequency Generator) is an output signal that conveys the rotation speed of the axial fan 531. In this embodiment, two axial flow fans 531 are arranged in parallel in close proximity to each other. It is desirable that the rotation speeds of the plurality of fans arranged in close proximity to each other are the same. This is because roaring noise is generated when the number of rotations is different.

Therefore, in the present embodiment, an appropriate PWM signal for achieving a desired rotation speed is calculated by referring to the FG signal on the substrate 12 of the camera 1, and different PWM signals are input to each of the two axial flow fans 531. Rotation speed feedback control is performed. The rotation speed of the two axial fan 531s is determined by the usage mode, operation mode, usage environment conditions, and the like of the system camera. Corresponding terminals (reference voltage, GND, PWM1, FG1, PWM2, FG2) are also arranged on the external interface 152 of the camera 1.

FIG. 9 is a perspective view showing the cooling module 5. The base portion 51 holds the fan unit 53 so as to be slidable to the first position and the second position. In FIG. 9, the fan unit 53 is held in the first position, and half of the fan unit 53 protrudes from the shielding portion 52. Further, the fan unit 53 covers a half region of the opening 5111, and the shielding portion 532 shields the overlapping region and the non-superimposing region of the opening 5111.

FIG. 10 is a partially cutaway cross-sectional perspective view showing the cooling module 5 holding the fan unit 53 in the second position. In the second position, the fan unit 53 is arranged at a position where it does not protrude from the shielding portion 52. Further, the fan unit 53 covers the entire area of the opening 5111, and as will be described later in FIG. 11, the airflow entering from the opening 5112 can be sucked up by the entire axial fan 531.

11 (a) is a perspective view showing a state in which the cooling module 5 is attached to the camera 1, and corresponds to FIG. 1 (c). FIG. 11B is a perspective view in which a part of the state in which the cooling module 5 is attached to the camera 1 is broken.

The cooling module 5 fixes the fixing portion 572 by screwing it to the fixing portion 172 of the camera 1. In such a fixed state, the opening 5112 is arranged directly above the vent 161 on the upper surface of the camera 1. The fan unit 53 covers the entire opening 5111, and the entire axial fan 531 is used to generate the airflow C.

FIG. 12 is a perspective view in which a part of the camera 1 is broken, and corresponds to FIG. 1 (b). In the configuration of FIG. 12, the elements 121 to 123 are cooled by natural air cooling (121 and 122 are not shown). In the case of natural air cooling, it is desirable that the outside air can be supplied near the heat source. The outside air is directly supplied from the vent 162 to the vicinity of the heat source (arrow B), and the elements 121 to 123 can be efficiently cooled.

The duct 164 becomes hot due to the heat transferred from the elements 121 to 123, but the portion provided with the vents 161 to 163 does not directly contact the duct 164, and the user does not touch the high temperature portion.

FIG. 13A is a perspective view showing a state in which the expansion module 4 is attached to the camera 1, and corresponds to FIG. 1D. FIG. 13B is a partially cutaway perspective view of the camera 1 in which the expansion module 4 is attached.

In the expansion module 4, the fixing portion 471 is screwed to the fixing portion 171 and the fixing portion 473 is screwed to the fixing portion 173. Further, the external interface 45 is directly connected to the external interface 151 (not shown).

In the configuration of FIG. 13, elements 121 to 123 (elements 121 and 122 are not shown) and elements 421 to 423 (elements 421 and 422 are not shown) are cooled by natural air cooling). In the camera 1, a natural air cooling flow path is formed by a vent 161, a duct 164, a vent 163, and a front surface portion 462. Further, in the expansion module 4, a natural air cooling flow path is formed by the ventilation port 461, the duct 464, the ventilation port 463, and the front surface portion 462.

FIG. 14 is an exploded perspective view showing a procedure for mounting the expansion module 4 and the cooling module 5 on the camera 1. First, the fixing portion 572 of the cooling module 5 is screwed to the fixing portion 172 of the camera 1 to fix the cooling module 5.

Next, the fixing portion 471 of the expansion module 4 is screwed to the fixing portion 171 of the camera 1, and the fixing portion 473 (not shown) is screwed to the fixing portion 173 to fix the expansion module 4. At this time, the fixing portion 471 is inserted through the opening portion 521, and the expansion module 4 is directly fixed to the camera 1.

FIG. 15A is a perspective view showing a state in which the expansion module 4 and the cooling module 5 are attached to the camera 1, and corresponds to FIG. 1A. FIG. 15B is a partially cutaway perspective view of the camera 1 in which the expansion module 4 and the cooling module 5 are mounted.

The expansion module 4 is directly fixed to the camera 1 by screwing according to the procedure described with reference to FIG. Further, although not shown, the external interface 45 is directly connected to the external interface 151.

A shielding portion 52 covers the ventilation port 162 with respect to the heat source of the camera 1, and a flow path is formed by the ventilation port 161, the ventilation port 163, the duct 164, and the shielding portion 52. On the other hand, for the heat source of the expansion module 4, a flow path is formed by the vent 461, the front surface portion 462, the vent 463, and the duct 464.

The fan unit 53 is arranged at a position straddling both the flow path of the camera 1 and the flow path of the expansion module 4. Then, the rotation of the axial fan 531 forms a forced air cooling flow path (E, F) in both the camera 1 and the expansion module 4. Further, the fan unit 53 covers a half region of the opening 5111, and the shielding portion 532 prevents the inflow of outside air from the non-superimposing region of the opening 5111 into the forced air cooling flow path.

As described above, in the present embodiment, the expansion module 4 and the cooling module 5 are separately fixed to the camera 1. Therefore, even if the cooling module 5 is inserted between the camera 1 and the expansion module 4, the holding force of the expansion module 4 and the rigidity of the entire system camera are not affected. Further, since the part of the cooling module 5 inserted between the camera 1 and the expansion module 4 is only the shielding portion 52, it is possible to suppress the increase in size of the system camera in the optical axis direction due to the insertion of the cooling module 5. .. Further, as described with reference to FIG. 12, the user does not touch the high temperature portion even if the camera 1 is operated alone.

(Second embodiment)
FIG. 16 is a perspective view showing the cooling module 6 of the system camera according to the second embodiment of the present invention. In the present embodiment, the camera 1 and the expansion module 4 are common to the first embodiment, but the method in which the cooling module 6 changes the position of the fan unit as compared with the cooling module 5 is different.

In FIG. 16, the fan unit 63 is held in the first position. Here, the first position and the second position in the present embodiment are the same as the first position and the second position in the first embodiment. Further, the external interface 652 is an interface for communicating with the camera 1.

The upper surface of the base portion 61 has an opening 6111, the lower surface has an opening 6112, and the fan unit 63 is provided with a shielding portion 632. At the first position, the fan unit 63 covers half the region of the opening 6111, and the shielding portion 632 divides the overlapping region and the non-superimposing region of the opening 6111.

FIG. 17 is an exploded perspective view of the cooling module 6. The fan unit 63 is detachably attached to the base portion 61. In FIG. 17, the fan unit 63 is held in the first position. The external interface 6531 is an interface for the base unit 61 to communicate with the fan unit 63.

PWM1b, FG1b, GNDb, reference voltage b, GNDb, FG2b, and PWM2b are arranged in order from the end of the terminal of the external interface 6531. PWM (Pulse Width Modulation) is an input signal for transmitting a duty ratio for individually performing PWM control of the axial flow fan 631A and the axial flow fan 631B of the fan unit 63 from the outside. The FG (Frequency Generator) is an output signal that conveys the rotation speeds of the axial fan 631A and the axial fan 631B.

On the other hand, in the fan unit 63, the axial flow fan 631A and the axial flow fan 631B are arranged in parallel and close to each other. PWM1f, FG1f, GNDf, reference voltage f, GNDf, FG2f, and PWM2f are arranged in order from the end of the terminal of the external interface 6532. The PWMf, FG1f, and GNDf are connected to the axial flow fan 631A. The GNDf, FG2f, and PWM2f are connected to the axial flow fan 631B. The reference voltage f is connected to both the axial flow fan 631A and the axial flow fan 631B.

At the first position, PWM1f and PWM1b, FG1f and FG1b, GNDf and GNDb, reference voltage f and reference voltage b, GNDf and GNDb, FG2f and FG2b, and PWM2f and PWM2b are connected.

FIG. 18A is a view of the cooling module 6 viewed from above at the first position, and FIG. 18B is a view of the cooling module 6 viewed from above at the second position. The cooling module 6 can be held in the second position by removing the fan unit 63 held in the first position and rotating the fan unit 63 around the external interface 6532 by 180 °.

At the second position, PWM1f and PWM2b, FG1f and FG2b, GNDf and GNDb, reference voltage f and reference voltage b, GNDf and GNDb, FG2f and FG1b, and PWM2f and PWM1b are connected.

Regardless of the other party, the camera 1 refers to the FG1b and outputs the duty ratio to the PWM1b, and refers to the FG2b to output the duty ratio to the PWM2b. Therefore, even if the connection partner changes, the rotation speed feedback control can be realized without any problem.

FIG. 19A is a perspective view showing a state in which the cooling module 6 is attached to the camera 1, and a perspective view in which a part of the state in which the cooling module 6 is attached to the camera 1 is broken. As shown in FIG. 19, the fan unit 63 is arranged at the second position and is fastened together with the base portion 61 with respect to the camera 1.

Further, the shielding portion 62 covers the ventilation port 162, and forms a forced air cooling flow path having the ventilation port 161 as an exhaust port and the ventilation port 163 as an intake port. Since the fan unit 63 covers the entire area of the opening 6111, the airflow exhausted from the vent 161 can be sucked up by the entire axial fan 631 (airflow C).

FIG. 20 (a) is a perspective view showing a state in which the expansion module 4 and the cooling module 6 are mounted on the camera 1, and FIG. 20 (b) shows a part of the state in which the expansion module 4 and the cooling module 6 are mounted on the camera 1. It is a perspective view. As shown in FIG. 20, the fan unit 63 is arranged at the first position and is fastened together with the base portion 61 with respect to the camera 1.

In the camera 1, the shielding portion 62 covers the ventilation port 162, and the flow path is formed by the ventilation port 161, the ventilation port 163, the duct 164, and the shielding portion 62. On the other hand, in the expansion module 4, a flow path is formed by the vent 461, the front surface portion 462, the vent 463, and the duct 464.

The fan unit 63 is arranged at a position straddling both the flow path of the camera 1 and the flow path of the expansion module 4, and the rotation of the axial flow fan 631 forms a forced air cooling flow path in both the camera 1 and the expansion module 4. (E, F). Further, the fan unit 63 covers a half region of the opening 6111, and the shielding portion 632 prevents the inflow of outside air from the non-superimposing region of the opening 6111 into the forced air cooling flow path. Other configurations and effects are the same as those in the first embodiment.

(Third embodiment)
FIG. 21 is a conceptual diagram showing the periphery of the cooling module 9 and the heat dissipation unit 76 of the system camera according to the third embodiment of the present invention. FIG. 21A is a conceptual diagram showing the periphery of the cooling module 9, the heat radiating unit 76, and the heat radiating unit 86 in a state where the camera 7, the expansion module 8, and the cooling module 9 are mounted. FIG. 21B is a conceptual diagram showing a state in which the expansion module 8 is not attached to the camera 7 and the cooling module 9 is attached.

The cooling module 9 includes a base portion 91, a shielding portion 92, and an axial flow fan 931. The shielding portion 92 has an opening portion 921 and a lid member 922 that supports the opening portion 921 so as to be openable and closable. The lid member 922 is arranged at the open position on the opposite side of the opening 911 with respect to the shielding portion 92, as shown in FIG. 21 (a).

In the usage mode of FIG. 21B, the lid member 922 is arranged at a position that shields the opening 921. The shielding portion 92 and the lid member 922 shield the ventilation port 762 of the camera 7, and the axial flow fan 931 is arranged directly above the ventilation port 761, so that the ventilation port 763 is used as an intake port and the ventilation port 761 is used as an exhaust port. A forced air cooling flow path is formed.

Returning to FIG. 21A, the heat dissipation portion 86 of the expansion module 8 is a vent 861 provided on the upper surface of the expansion module 8, a front portion 862 of the expansion module 8, and a vent 863 provided on the bottom surface of the expansion module 8. And has a duct 864. The duct 864 may be provided with fin pins in order to increase the heat transfer efficiency. The front surface portion 862 has a vent 8621 at a position facing the opening 921. The lid member 922 of the cooling module 9 is arranged in the open position.

At this time, the lid member 922 closes the ventilation port 861 of the expansion module 8. On the other hand, the space 866 is connected to the space 766 through the opening 921 and the ventilation port 8621, and a forced air cooling flow path is formed in both the heat radiation unit 76 and the heat radiation unit 86 to make the elements 721 to 723 and the elements 821 to 823 efficient. Cool down.

FIG. 21C is a conceptual diagram showing a state in which the expansion module 8 is attached to the camera 7 without attaching the cooling module 9. In this configuration, a natural air cooling flow path is formed in each of the space 766 and the space 866 to cool the elements 721 to 723 and the elements 821 to 823.

22 (a) and 22 (b) are perspective views of the camera 7, and FIG. 22 (c) is a perspective view in which a part of the camera 7 is broken. A vent 761 is provided on the upper surface of the camera 7, a vent 762 is provided on the back surface, and a vent 763 is provided on the bottom surface.

Further, an external interface 751 is provided on the back surface of the camera 7, and an external interface 752 for communicating with the cooling module 9 is provided on the upper surface. The fixing portion 771 and the fixing portion 773 are fixing portions with the expansion module 8, and are described as, for example, screw fastening portions for screwing screws in the optical axis direction.

FIG. 23 is a perspective view showing the cooling module 9. The lid member 922 is rotatable between a closed position that closes the opening 921 and the opening 923 provided in the shielding portion 92 with the shaft 9221 as a rotation axis, and an open position that does not close the opening 923. The two axial flow fans 931 are fixed directly above the opening 911 of the base portion 91.

FIG. 24A is a perspective view of the expansion module 8, and FIG. 24B is a perspective view of the expansion module 8 in which a part thereof is cut off. The expansion module 8 is provided with a vent 861 on the upper surface and a vent 863 on the bottom surface, and is provided with a vent 8621 at a position facing the opening 921 of the cooling module 9 of the front portion 862. The expansion module 8 includes a space 866 including a vent 861, a vent 8621, a vent 863, a front surface portion 862, and a duct 864. The fixed portion 871 and the fixed portion 873 are fixed portions to the camera 7.

FIG. 25 (a) is a perspective view showing a state in which the cooling module 9 is attached to the camera 7, and FIG. 25 (b) is a perspective view in which a part of the state in which the cooling module 9 is attached to the camera 7 is broken. The cooling module 9 is used by closing the lid member 922. The axial flow fan 931 and the opening 911 are arranged directly above the ventilation port 761, and the lid member 922 and the shielding portion 92 cover the ventilation port 762 so that the ventilation port 761 is used as an exhaust port and the ventilation port 763 is used as an intake port. Form a forced air cooling flow path.

FIG. 26 is an exploded perspective view showing a procedure for mounting the expansion module 8 and the cooling module 9 on the camera 7. The lid member 922 of the cooling module 9 is arranged in the open position, and the opening 921 and the opening 923 are exposed.

After fixing the fixing portion 972 of the cooling module 9 to the fixing portion 772 of the camera 7 by screwing it, the fixing portion 871 is inserted through the opening 923, and the fixing portion 873 is fixed at the same time as screwing to the fixing portion 771 of the camera 7. Screw it to the portion 773. When the lid member 922 is closed, the fixing portion 871 interferes with the lid member 922, so that the expansion module 8 cannot be attached.

27 (a) is a perspective view showing a state in which the expansion module 8 and the cooling module 9 are attached to the camera 7, and FIG. 27 (b) shows a part of the state in which the expansion module 8 and the cooling module 9 are attached to the camera 7. It is a perspective view. The lid member 922 of the cooling module 9 is arranged in the open position. At this time, the lid member 922 is arranged directly above the vent 861 of the expansion module 8 and closes the vent 861.

On the other hand, the space 866 is connected to the space 766 through the opening 921 and the vent 8621. The axial flow fan 931 is arranged so as to straddle the space 766 and the space 866, and forms a forced air cooling flow path in both the heat radiation unit 76 and the heat radiation unit 86, and the elements 721 to 723 (elements 721 and 722 are not shown). And the elements 821 to 823 (elements 821 and 822 are not shown) are cooled.

In order to forcibly air-cool both the camera 7 and the expansion module 8 by the cooling module 9, it is necessary that the lid member 922 is in the open position, the vent 863 is closed, and the opening 921 is opened. Further, as shown in FIG. 26, since the expansion module 8 cannot be attached unless the lid member 922 is opened, it is possible to prevent the user from misassembling. Other configurations and effects are the same as those in the first embodiment.

The configuration of the present invention is not limited to those exemplified in each of the above embodiments, and the material, shape, dimensions, form, number, arrangement location, etc. are appropriately changed as long as the gist of the present invention is not deviated. It is possible, and some of the above-described embodiments may be combined as appropriate. For example, in the above embodiment, the system camera is described as a system camera including a camera body, a cooling module, and an expansion module, but a system camera including a camera body and a cooling module as shown in FIGS. 1 (c) and 2 (c). It may be.

Further, in each of the above embodiments, the fan unit has two axial-flow fans arranged in parallel in close proximity to each other, but a sirocco fan may be used, and the number of fans may be one or three or more.

Further, in each of the above embodiments, the fan unit is arranged on the upper surface of the camera, but may be arranged so as to be superimposed on the ventilation holes provided on the other surface of the camera. Further, the fan unit may be arranged so as to be superimposed on the ventilation port at a position where it does not interfere with the expansion module on the back surface of the camera, and a forced air cooling flow path having the ventilation port on the upper surface or another surface of the camera as the intake port may be formed.

1 Camera 4 Expansion module 5 Cooling module 16 Heat dissipation unit 53 Fan unit 161 to 163 Ventilation port 1641 Heat dissipation fin

Claims (7)

A first that has at least one surface provided with a first vent, is capable of heat exchange between the inside and the outside through the first vent, and includes the first vent. With a camera that has a flow path of
A cooling module that is detachably attached to the camera and has a fan unit, a base portion that holds the fan unit, and a first shielding portion.
A system camera that is detachably attached to the camera and includes an expansion module that expands the functions of the camera.
The expansion module has a surface provided with a second vent, heat can be exchanged between the inside and the outside through the second vent, and the second vent is included. It has 2 flow paths and
When the cooling module is mounted on the camera , the fan unit is arranged so as to be superimposed on a part of the first vent, and the first shielding portion is the fan of the first vent. By shielding at least a part of the non-superimposing region with the unit, the first flow path becomes a forced air cooling flow path.
In a state where the cooling module and the expansion module are mounted on the camera, the first shielding portion is arranged between the camera and the expansion module, and the fan unit is the first flow path. A system camera characterized in that it is arranged so as to straddle the second flow path . The cooling module has a first position where the fan unit straddles both the first flow path and the second flow path, and the fan unit is in the first flow path and the second flow path. The system camera according to claim 1 , wherein a transition is possible to a second position that is not in the flow path. The system camera according to claim 2 , wherein the cooling module is capable of transitioning between the first position and the second position by sliding the fan unit. The fan unit has two fans provided in parallel.
Each of the fan unit and the base portion has an interface for connecting the fan unit and the base portion so as to be able to communicate with each other.
The fan unit is detachably attached to the base portion, and by rotating the fan unit by 180 ° in the removed state and attaching the fan unit to the base portion, the first position and the second position are obtained. Transition to position is possible,
The interface connects the fan unit and the base portion so that the rotation speeds of the two fans of the fan unit can be individually controlled at the first position and the second position, respectively . 2. The system camera according to claim 2 . The base portion has an opening on the surface for holding the fan unit.
The fan unit covers a part of the opening in the first position, covers the entire area of the opening in the second position, and does not superimpose the opening in the first position by the fan unit. The system camera according to claim 3 or 4, wherein the system camera has a second shielding portion for preventing the inflow of outside air from the region into the fan unit. The first shielding portion has an opening at a position facing a part of the first vent.
The cooling module has a lid member capable of transitioning between a closed position that shields the opening of the first shielding portion and an open position that does not shield the opening.
The second flow path of the expansion module has a third vent at a position facing the opening, and heat can be exchanged between the inside and the outside through the third vent. ,
One of claims 1 to 5 , wherein the lid member interferes with the fixing portion of the expansion module to the camera in the closed position and shields the second vent in the open position. The system camera described in the section. The expansion module has a recording function for recording image pickup data transmitted from the camera, a power supply function for the camera, an operating means for the user to operate the camera, an interface for connecting to other electronic devices, and the like. The system camera according to any one of claims 1 to 6 , further comprising at least one of a display function for displaying image pickup data transmitted from the camera.

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