JP7098778B2 - Unmanned aircraft equipped with electronic devices - Google Patents

Description

The present disclosure relates to an unmanned aircraft equipped with electronic devices such as an aerial camera.

Conventionally, an unmanned air vehicle equipped with a plurality of rotor units having a propeller has been known. This type of unmanned aerial vehicle is called a multicopter or drone, and is expected to be used in various fields such as measurement, surveying, broadcasting, surveillance, agriculture, medical care, environmental research, and logistics, and has been particularly developed in recent years. It is flourishing and sales are expanding.

This type of unmanned air vehicle is disclosed in, for example, Patent Document 1. In the unmanned air vehicle disclosed in Patent Document 1, by installing a control circuit board having a drive control circuit and a sensor on the outside, the cooling property of the control circuit board is improved and the weight is reduced. In addition, unmanned aircraft are often equipped with aerial photography cameras in order to obtain peripheral information according to autonomous flight and applications.

An unmanned air vehicle equipped with an aerial photography camera is mainly used outdoors, and when the control circuit board that controls the operation of the aerial photography camera is exposed to the outside as disclosed in Patent Document 1, it rains. There is a risk of failure due to exposure to snow. Therefore, it is necessary to house the control circuit board in the housing and take heat measures to avoid problems such as performance deterioration and malfunction due to heat generation of the control circuit board due to the operation of the aerial camera. be.

As a measure against heat of such a control circuit board, a method using a heat transfer sheet is known. Regarding the heat measures by the heat transfer sheet, for example, Patent Document 2 discloses an electronic camera to which the heat measures are taken. In the electronic camera disclosed in Patent Document 2, the housing is made of a metal member, and one end side of the heat transfer sheet is directly brought into close contact with the upper surface of the integrated circuit (drive circuit element group) of the control circuit board to form the heat transfer sheet. By bringing the other end portion of the integrated circuit into close contact with the housing, the heat generated in the integrated circuit is transferred to the housing via the heat transfer sheet.

Japanese Unexamined Patent Publication No. 2006-051864 Japanese Patent Application Laid-Open No. 2003-143451

However, if the heat measures as disclosed in Patent Document 2 are simply adopted for the aerial photography camera mounted on the unmanned aircraft, the housing of the aerial photography camera will be made of metal. The weight increases, which raises the problem of hindering the need for weight reduction required for unmanned aircraft.
On the other hand, as disclosed in Patent Document 1, if the control circuit board is simply exposed to the outside, it is exposed to rain and snow, and there is a risk of failure.

The technology of the present disclosure has been made in view of these points, and the purpose thereof is to reduce the weight of electronic devices such as aerial photography cameras mounted on unmanned aircraft, while reducing the weight of the electronic devices. The purpose is to improve the heat dissipation of the integrated circuit provided in the control circuit board built in, and to prevent the control circuit board from being affected by rain and snow.

In order to achieve the above object, in the technique of the present disclosure, a resin housing is adopted, the control circuit board is housed in the housing, and the upper part of the housing cooled by the wind power of the propeller is used. The heat of the control circuit board is transferred.

Specifically, the technique of the present disclosure is intended for an unmanned vehicle equipped with an electronic device such as an aerial photography camera.

The unmanned vehicle according to the technique of the present disclosure is an unmanned vehicle equipped with an electronic device such as an aerial camera, and is provided around the unmanned vehicle with a plurality of propellers that generate lift and thrust by wind power. The control circuit board includes a resin housing that is installed at a position lower than the position of the propeller and constitutes the outer shell of the electronic device, and a control circuit board housed in the housing. An integrated circuit that generates heat as the electronic device operates is provided, and the integrated circuit is connected to an upper wall portion of the housing near the propeller by a heat transfer portion.

According to this configuration, a resin housing that constitutes the outer shell of an electronic device is installed at a position lower than a plurality of propellers provided around the unmanned air vehicle, and the housing is closer to the propeller. Since the wall part and the integrated circuit on the control circuit board are connected by a heat transfer part, even if the integrated circuit generates heat due to the operation of the electronic device, the heat of the integrated circuit is close to the propeller of the housing. By transferring heat to the wall portion, heat can be effectively dissipated from the upper wall portion of the housing to the outside. As a result, it is possible to improve the heat dissipation of the integrated circuit by utilizing the propeller of the unmanned flying object while reducing the weight of the aerial camera by making the housing made of resin.

In the unmanned vehicle as described above, the housing includes a housing housing portion for accommodating the control circuit board and a lid covering the opening of the housing housing portion, and the housing housing portion and the lid body. It is desirable that a seal member having rubber elasticity is provided between the two, and the heat-generating integrated circuit is connected to the lid of the housing by the heat transfer portion.

According to the unmanned vehicle according to the technique of the present disclosure, even if the integrated circuit generates heat due to the operation of the electronic device, the heat of the integrated circuit is transferred to the upper wall portion near the propeller of the housing, so that the housing can be heated. It is possible to effectively dissipate heat to the outside from the upper wall part. As a result, it is possible to improve the heat dissipation of the integrated circuit by utilizing the propeller of the unmanned flying object while reducing the weight of the aerial camera by making the housing made of resin. As a result, it is possible to improve the reliability of the control circuit board and prevent the occurrence of defects such as performance deterioration and malfunction of the aerial photography camera without deteriorating the flight performance of the unmanned vehicle.

It is a perspective view which shows the unmanned flying body which concerns on embodiment. It is a perspective view which shows the aerial photography camera which concerns on embodiment. It is an exploded perspective view which shows the aerial photography camera which concerns on embodiment. It is sectional drawing of the aerial photography camera in line IV-IV of FIG. It is sectional drawing of the aerial photography camera in the VV line of FIG. It is an exploded perspective view of the lid body of the aerial photography camera and the heat transfer sheet which concerns on embodiment. It is a combination perspective view of the lid body of the aerial photography camera and the heat transfer sheet which concerns on embodiment. It is a side view which shows the state at the time of flight of the unmanned flying body which concerns on embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the drawings.

In this embodiment, an unmanned flying object equipped with an aerial photography camera, which is a kind of electronic device, will be described as an example.

FIG. 1 shows a perspective view of the unmanned flying object 1 according to this embodiment. Further, FIG. 2 shows a perspective view of the aerial photography camera 7 mounted on the unmanned flying object 1.

The unmanned airframe 1 is a relatively small aircraft called a multicopter or a drone capable of vertical takeoff and landing. It is equipped with an aerial photography camera 7 detachably attached to the aircraft 3.

Although not shown, the airframe 3 has a built-in drive system that comprehensively controls the drive of the flight unit 5 and the aerial photography camera 7, and a battery that is a power source for the flight unit 5 and the aerial photography camera 7. The machine body 3 is provided with a plurality of rotor arms 9 (six in the example shown in FIG. 1) and a camera stay 11.

The rotor arms 9 are formed in a pipe shape, are arranged at equal intervals in the circumferential direction of the machine body 3, and extend radially toward the outer peripheral side of the machine body 3. The camera stay 11 is arranged on one side (front) of the machine body 3, and is formed by combining a plurality of pipe-shaped supports 13.

The flight unit 5 includes a number of rotor units 15 corresponding to the rotor arms 9 (six in the example shown in FIG. 1). The rotor unit 15 is attached to each rotor arm 9, and includes a propeller 17 and a motor (not shown) for rotating the propeller 17.

The plurality of rotor units 15 generate lift that raises the machine body 3 by making the rotation speeds of the motors substantially the same, so that the machine body 3 can be maintained in a horizontal posture. Further, the plurality of rotor units 15 generate a thrust that tilts the machine body 3 to move it in the horizontal direction by changing the rotation speed of at least one of the rotor units 15, and tilts the machine body 3 forward toward the traveling direction. It is possible to move in the horizontal direction in a tilted posture.

As shown in FIG. 2, the aerial photography camera 7 includes a camera body 19 and a camera mounting unit 21 for mounting the camera body 19 on the camera stay 11. The camera mounting unit 21 has a pedestal 23 and a mount support 25 that supports the camera body 19 on the pedestal 23. The pedestal 23 has a configuration in which a plurality of rubber dampers 29 (four in the example shown in FIG. 1) are interposed between a pair of plate-shaped bodies 27, and the vibration damping action of the dampers 29 is applied to the pedestal 23 from the machine body 3. The vibration transmitted to the camera body 19 is reduced.

The camera body 19 is rotatably attached to the mount support 25. The mount support 25 is provided with a screw-fixing type adjusting portion 31. The adjusting unit 31 has a screw 33 for fixing the camera body 19, and the camera body 19 is rotated with the screw 33 loosened, and the screw 33 is tightened at the position after the rotation to change the angle of the camera body 19. The shooting direction of the aerial camera 7 can be adjusted. The camera body 19 is in a posture in which the lens 85 faces substantially horizontally or slightly diagonally downward by adjusting the angle by the adjusting unit 31.

Next, the configuration of the aerial photography camera 7 (camera body 19) will be described in detail with reference to FIGS. 3 to 5.

FIG. 3 is an exploded perspective view of the camera body 19 forming the aerial photography camera 7. FIG. 4 is a cross-sectional view of the aerial camera 7 taken along the line IV-IV of FIG. Further, FIG. 5 is a cross-sectional view of the aerial photography camera 7 in the VV line of FIG. In the following description, regarding the aerial photography camera 7, the shooting direction in which the lens 85 faces is referred to as "front", the direction opposite to the shooting direction in which the lens 85 faces is referred to as "rear", and the left direction when facing forward is referred to as "rear". The "left" and the right direction are referred to as "right".

As shown in FIGS. 2 to 5, the aerial camera 7 includes a housing 35 constituting the outer shell of the camera, a plurality of electronic components 37, 39, 41 housed in the housing 35, and a plurality of electrical wirings. It is equipped with 43. The plurality of electronic components 37, 39, 41 are a speaker 37, an image pickup unit 39, a control circuit board 41, and the like. The electrical wiring 43 is wiring that electrically connects the drive system built in the machine body 3 and the circuit provided on the control circuit board 41.

The housing 35 has a housing housing portion 45 to which the electronic components 37, 39, and 41 are assembled internally, and a lid 49 that closes the opening 47 formed on the upper side of the housing housing portion 45. .. The housing housing portion 45 and the lid 49 are resin parts molded by injection molding or the like, and are made of engineering plastic such as polycarbonate (PC), and a plurality of them (four in the example shown in FIG. 3). The housing 35 is formed by being connected to each other by the screws 51 of the above.

The housing 35 is designed to be dust-proof and drip-proof.

Specifically, a seal member 53 having rubber elasticity is sandwiched between the peripheral edge of the opening 47 of the housing accommodating portion 45 and the outer peripheral edge of the lid 49, and water or the like is contained in the housing 35. It is designed to prevent liquids and dust from entering. Further, a configuration in which the periphery of the image pickup unit 39, which will be described later, is sealed inside the lens hole 91 by a seal member 93, a configuration in which the sound transmission hole 61 is closed by a drip-proof seal 63, and a plurality of electrical wirings 43 are externally used by using a drip-proof connector 65. The configuration that draws out the light also contributes to the realization of dustproof and splashproof specifications.

A shallow cylindrical concave speaker mounting portion 55, a rectangular connector fitting hole 57, and a small-diameter circular ventilation hole 59 are formed on the bottom wall portion of the housing housing portion 45. The speaker mounting portion 55 is located near the center of the bottom wall portion of the housing housing portion 45. The speaker 37 is fitted into the speaker mounting portion 55 and mounted on the housing accommodating portion 45. A sound passage hole 61 penetrating downward is formed on the bottom wall of the speaker mounting portion 55. The sound passage hole 61 is closed by a drip-proof seal 63 outside the housing accommodating portion 45.

The connector fitting hole 57 is located on the rear side of the speaker mounting portion 55. In the connector fitting hole 57, a drip-proof connector 65 that penetrates and holds all of the plurality of electrical wirings 43 is fitted from below the housing accommodating portion 45. The drip-proof connector 65 has a flange 67 protruding from the outer periphery, and is attached to the housing accommodating portion 45 by adhering the flange 67 to the peripheral edge portion of the connector fitting hole 57 with an annular double-sided tape 69. The drip-proof connector 65 is made of a material having rubber elasticity such as silicon resin, and closes the connector fitting hole 57 to seal between the hole 57 and the electric wiring 43.

The ventilation hole 59 is located on the right side of the connector fitting hole 57. The ventilation hole 59 is closed by an internal pressure adjusting seal 71 outside the housing accommodating portion 45. The internal pressure adjusting seal 71 is composed of a waterproof ventilation filter that allows air to pass through but does not allow water to pass through, and adjusts the air pressure inside the housing 35.

On the bottom wall portion of the housing accommodating portion 45, a bottom cover 73 that covers the sound passage hole 61, the connector fitting hole 57, and the ventilation hole 59 on the back side is provided with a drip-proof seal 63, a drip-proof connector 65, and an internal pressure. The adjustment seal 71 is attached by a plurality of screws 75 in a state of being sandwiched between the adjustment seal 71 and the bottom wall portion.

The bottom cover 73 has a sound emitting hole 77 corresponding to the sound passage hole 61 through the drip-proof seal 63, a wiring outlet hole 79 for drawing out a plurality of electrical wirings 43 held in the drip-proof connector 65, and an internal pressure adjustment seal 71. An internal pressure adjusting hole 81 corresponding to the ventilation hole 59 is formed through the hole. Further, on the back side of the portion of the bottom cover 73 corresponding to the wiring outlet hole 79, a wiring guide portion 83 for guiding a plurality of electrical wirings 43 through the wiring outlet hole 79 to the rear is provided.

The plurality of electrical wirings 43 are composed of two power supply wirings 43a provided for power supply and five signal wirings 43b provided for transmission of control signals. One end of the power supply wiring 43a is connected to the circuit provided on the control circuit board 41 by soldering or the like at the front portion of the control circuit board 41. On the other hand, one end of the signal wiring 43b is connected to the circuit provided on the control circuit board 41 by soldering or the like at the rear portion of the control circuit board 41.

The power supply wiring 43a is routed rearward along the bottom wall portion of the housing housing portion 45, and is held through the drip-proof connector 65 together with the signal wiring 43b. The power supply wiring 43a and the signal wiring 43b are guided backward by the wiring guide portion 83 provided on the bottom cover 73, and are collectively pulled out from the opening provided at the rear end of the wiring guide portion 83. ing.

The image pickup unit 39 includes a lens 85, an image pickup element 87 including an image sensor that converts an image formed by the lens 85 into an electric signal, and an optical element holder 89 that holds the lens 85 and the image pickup element 87. The image pickup unit 39 is assembled close to the front wall portion of the housing accommodating portion 45. The lens 85 projects to the outside of the housing 35 from the lens hole 91 formed in the front wall portion thereof.

A seal member 93 having rubber elasticity is sandwiched between the optical element holder 89 portion of the image pickup unit 39 that holds the lens 85 and the inner peripheral surface of the lens hole 91 to seal the two. A lens protection sheet 95 for protecting the image pickup unit 39 is provided on the rear side of the image pickup unit 39.

The image pickup element 87 is arranged behind the lens 85, and is assembled to the optical element holder 89 together with the lens 85. The image pickup device 87 is electrically connected to the control circuit board 41 via a flat cable 97. The flat cable 97 is adapted to input an electric signal output from the image pickup element 87 to a circuit provided on the control circuit board 41.

The control circuit board 41 is assembled in the housing accommodating portion 45 by using the board holder 99. Specifically, the control circuit board 41 is attached to the board holder 99 by a plurality of screws 101 (four in the example shown in FIG. 3), and the board holder 99 is attached to the bottom wall portion of the housing accommodating portion 45. It is fixed by screws 105 to a plurality of bosses 103 (only two of the three are shown in FIG. 3) provided around the speaker mounting portion 55.

On the lower surface of the control circuit board 41, there is a card socket 107 (see FIG. 5) in which a memory card 106 such as an SD card is mounted for recording an aerial photograph taken, and a USB (Universal Serial Bus) standard (not shown). A compliant external connection connector is mounted. On the right wall portion of the housing accommodating portion 45, a side terminal portion 111 having openings 108 and 109 so that the card insertion slot of the card socket 107 and the connection port of the external connection connector face to the outside is provided.

The side terminal portion 111 is recessed toward the inside of the housing 35, and is covered with the terminal cover 113 when the external connection connector is not used and the card socket 107 is not operated. The terminal cover 113 is made of a material having rubber elasticity, and is attached to the housing 35 by fastening one end side to the right wall portion of the housing housing portion 45 with a screw 115, and covers the side terminal portion 111. Seal openings 107 and 108.

Further, on the upper surface of the control circuit board 41, an ASIC (Application Specific Integration circuit) 117, which is a main integrated circuit constituting the circuit, and other electronic circuit components 119 are provided. The ASIC 117 is an electronic circuit that controls the operation of the aerial photography camera 7, and has a property of generating heat as the aerial photography camera 7 operates. Since the heat generated by the ASIC 117 causes problems such as deterioration of the performance of the aerial photography camera 7 and malfunction, in this embodiment, a heat transfer sheet 121 is used for the aerial photography camera 7 to take heat measures.

Specifically, the ASIC 117 is connected to the back surface (inner side surface) of the lid 49, which is the outer wall portion of the housing 35 that is exposed to the flight wind, by a heat transfer sheet 121. The lid 49 faces the upper surface of the control circuit board 41 on which the ASIC 117 is provided, and forms a heat dissipation space 123 with the control circuit board 41. One end side of the heat transfer sheet 121 is attached to the ASIC 117, and the other end side of the heat transfer sheet 121 is folded back from the portion attached to the ASIC 117 in the heat dissipation space 123 and attached to the back surface of the lid 49. It is attached.

FIG. 6 shows an exploded perspective view of the heat transfer sheet 121 and the lid 49. Further, FIG. 7 shows a combined perspective view of the heat transfer sheet 121 and the lid 49.

The heat transfer sheet 121 is a conductive graphite sheet having one surface as an adhesive surface for sticking. As shown in FIGS. 6 and 7, in the heat transfer sheet 121, the portion on the one end side attached to the ASIC 117 is formed in a band shape, and the portion on the other end side attached to the back surface of the lid 49 is formed. As a whole (except for the slit 129 described later), it is formed in a relatively wide rectangular shape, and is attached to the back surface of the lid 49 over a region wider than the size of the ASIC 117 when viewed from above. It is attached.

As shown in FIG. 5, an insulating protective sheet 125 is provided between the peripheral portion of the control circuit board 41 and the heat transfer sheet 121. The energization protection sheet 125 covers the electronic circuit components 119 around the ASIC 117, and prevents energization of the electronic circuit components 119 via the heat transfer sheet 121. As a result, in the aerial photography camera 7, the reliability of the control circuit board 41 is not impaired due to the provision of the heat transfer sheet 121.

The energization protection sheet 125 is formed with an opening 127 for heat transfer that exposes the ASIC 117. The heat transfer sheet 121 is attached to the ASIC 117 from above the energization protection sheet 125 via the heat transfer opening 127. If the heat transfer sheet 121 may be peeled off from the ASIC 117, the heat transfer sheet 121 may be attached to and fixed to the energization protection sheet 125 or the control circuit board 41 by another fixing sheet (not shown).

The portion of the heat transfer sheet 121 to be attached to the back surface of the lid 49 is divided into a plurality of (three in the illustrated example) attachment pieces 131 by a slit 129 opened on the side opposite to the folded portion of the sheet 121. Has been done. On the other hand, on the back surface of the housing 35, a plurality of reinforcing ribs 133 extending from front to back, left and right are provided. The plurality of reinforcing ribs 133 are composed of a plurality of vertical ribs 133a extending in the front-rear direction and a plurality of horizontal ribs 133b extending in the left-right direction.

The plurality of vertical ribs 133a are arranged close to the left and right edges of the lid 49, and define a sticking area 135 to which the heat transfer sheet 121 is stuck in the central portion of the back surface of the lid 49. The pasting area 135 is formed so as to cross the slits 129 of the heat transfer sheet 121 and the corresponding number (two in the illustrated example) of the lateral ribs 133b. These horizontal ribs 133b divide the sticking area 135 into a number of divided sticking areas 137 corresponding to the sticking pieces 131 of the heat transfer sheet 121.

The horizontal rib 133b that divides the pasting area 135 is generally arranged at a position corresponding to both the left and right sides of the ASIC 117, and the heat radiating space 123 is a lateral position of the central space 123a and the ASIC 117 as the first space corresponding to the ASIC 117. It is partitioned into a side space 123b as a second space corresponding to the above. Since the lateral rib 133b serves as a heat-dissipating shielding wall, the heat generated by the ASIC 117 is more likely to be trapped in the central space 123a, and the heat generated by the ASIC 117 is less likely to be transmitted in the side space 123b than in the central space 123a.

The individual attachment pieces 131 of the heat transfer sheet 121 are attached to different divided attachment areas 137 on the back surface of the lid 49 through the horizontal rib 133b corresponding to the slit 129. That is, the heat transfer sheet 121 is attached to the divided attachment area 137 corresponding to the central space 123a of the lid 49, and is also attached to each divided attachment area 137 corresponding to both side spaces 133b.

As described above, the heat transfer sheet 121 is attached over a relatively wide range including the divided attachment area 137 corresponding to the side space 133b, which is relatively difficult to raise the temperature on the back surface of the lid 49. As a result, the heat transfer sheet 121 is cooled by the outside air via the lid 49 in a relatively large area, and in particular, the portion attached to each divided attachment area 137 corresponding to both side spaces 133b. It is possible to obtain a relatively high air cooling effect.

FIG. 8 shows a side view showing the state of the unmanned flying object 1 during flight. In FIG. 8, the white arrow indicates the flight direction of the unmanned flying object 1, and the line arrow in the enlarged portion of the image pickup camera 7 indicates the flow of the flight wind.

The unmanned vehicle 1 having the above configuration can shoot an aerial image by operating the aerial camera 7 while flying. As shown in FIG. 8, the unmanned flying object 1 is mainly directed toward the shooting direction of the aerial photography camera 7, except when the unmanned flying object 1 is turned or turned at the time of shooting the aerial image. It is operated to fly forward or controlled to fly autonomously.

At this time, since the unmanned flying object 1 is in a forward leaning posture toward the traveling direction, the aerial photography camera 7 is also in a forward leaning posture in which the lens 85 is obliquely downward. As a result, during the shooting of the aerial video, the outer surface of the lid 49 of the aerial camera 7 is exposed to the flight wind coming from the front in the flight direction. Will be done. As a result, the heat transferred from the ASIC 117 on the control circuit board 41 to the lid 49 through the heat transfer sheet 121 is effectively dissipated to the outside by the flight wind.

-Effect of embodiment-
According to the aerial photography camera 7 according to this embodiment, the resin housing 35 is adopted, and the ASIC 117 and the housing 35 on the control circuit board 41 housed in the housing 35 are particularly exposed to the flight wind. Since the heat transfer sheet 121 is connected to the lid 49, even if the ASIC 117 generates heat due to the operation of the aerial photography camera 7, the heat of the ASIC 117 is transferred to the lid 49 via the heat transfer sheet 121. It can be transmitted and effectively dissipated from the lid 49 to the outside. As a result, the housing 35 is made of resin to reduce the weight of the aerial photography camera 7, and the heat dissipation of the ASIC 117 can be improved.

Further, according to the unmanned flight object 1 according to this embodiment, the aerial photography camera 7 has an excellent characteristic that the heat dissipation of the ASIC 117 can be improved while reducing the weight as described above, so that the unmanned flight can be carried out. It is possible to improve the reliability of the control circuit board 41 and prevent the occurrence of problems such as performance deterioration and malfunction of the aerial photography camera 7 without deteriorating the flight performance of the body 1.

As described above, a preferred embodiment has been described as an example of the technique of the present disclosure. However, the technique of the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. In addition, the components described in the attached drawings and the detailed description may include components that are not essential for solving the problem. Therefore, it should not be immediately determined that those non-essential components are essential by the fact that those non-essential components are described in the accompanying drawings or detailed description.

For example, the embodiment may have the following configuration.

In the above embodiment, the heat transfer sheet 121 is made of a graphite sheet, but the present invention is not limited to this. The graphite sheet is only an example of the heat transfer sheet 121, and the heat transfer sheet 121 may be a sheet made of a metal foil such as an aluminum foil or a copper foil as long as it has a good heat transfer rate. A sheet made of a heat transfer material can be adopted.

In the above embodiment, the sticking area 135 provided on the back surface of the lid 49 is divided into three split sticking areas 137 by the horizontal rib 133b, and the heat transfer sheet 121 corresponds to the split sticking area 137. The form having the above is illustrated, but the present invention is not limited to this. The pasting area 135 may be divided into four or more divided pasting areas 137 by the horizontal rib 133b, or may be divided into two or less divided pasting areas 137. In these cases, the heat transfer sheet 121 may have a number of sticking pieces 131 corresponding to the split sticking area 137 divided by the slit 129.

Further, the pasting area 135 may be divided into a plurality of divided pasting areas 137 by the vertical ribs 133a, or may be divided into a plurality of divided pasting areas 137 by both the vertical ribs 133a and the horizontal ribs 133b. .. In these cases, the heat transfer sheet 121 is attached to each divided attachment area 137 straddling the vertical rib 133a that divides the attachment area 135.

In the above embodiment, the heat transfer sheet 121 is attached to each of the divided attachment areas 137 corresponding to the central space 123a and both side spaces 133b on the back surface of the lid 49, but the present invention is not limited to this. The heat transfer sheet 121 may be attached only to the divided pasting area 137 corresponding to the central space 123a on the back surface of the lid 49, or may be attached only to the divided pasting area 137 corresponding to the side space 123b. It doesn't matter.

That is, the sticking area 135 is divided into a plurality of divided regions by the reinforcing ribs 133 (vertical ribs 133a and horizontal ribs 133b), and the heat transfer sheet 121 is attached to at least one of the plurality of divided regions. Just do it. Further, the pasting area 135 may not be divided into a plurality of divided areas (divided pasting area 137). In short, the heat transfer sheet 121 may be connected by being directly attached to the ASIC 117 on the control circuit board 41 and the back surface of the lid 49.

In the above embodiment, the electronic device mounted on the unmanned aircraft 1 according to the technique of the present disclosure is
The explanation has been given by taking the aerial camera 7 as an example, but the description is not limited to this. The electronic device mounted on the unmanned vehicle 1 may be a surveying device such as a laser scanner, or any device as long as it has a built-in control circuit board provided with an integrated circuit that generates heat when operated. It may be another electronic device according to the above.

As described above, the techniques of the present disclosure are useful for aerial photography cameras and electronic devices mounted on unmanned vehicles and for unmanned vehicles equipped with them.

1 ... unmanned airframe, 3 ... airframe, 5 ... flight unit, 7 ... aerial camera (electronic device),
9 ... rotor arm, 11 ... camera stay, 13 ... support, 15 ... rotor unit,
17 ... Propeller, 19 ... Camera body, 21 ... Camera mounting unit,
25 ... mount support, 27 ... plate-like body, 29 ... damper, 31 ... adjustment part,
33 ... screw, 35 ... housing, 37 ... speaker, 39 ... imaging unit,
41 ... Control circuit board, 43 ... Electrical wiring, 43a ... Power supply wiring, 43b ... Signal wiring,
45 ... Housing housing, 47 ... Opening, 49 ... Lid, 51 ... Screws, 53 ... Seal member,
55 ... Speaker mounting part, 57 ... Connector fitting hole, 59 ... Vent hole, 61 ... Sound passage hole,
63 ... Drip-proof seal, 65 ... Drip-proof connector, 67 ... Flange, 69 ... Double-sided tape,
71 ... Internal pressure adjustment seal, 73 ... Bottom cover, 75 ... Screw, 77 ... Sound release hole,
79 ... Wiring outlet hole, 81 ... Internal pressure adjustment hole, 83 ... Wiring guide part, 85 ... Lens,
87 ... Image sensor, 89 ... Holder, 91 ... Lens hole, 93 ... Seal member,
95 ... lens protection sheet, 97 ... flat cable, 99 ... board holder,
101 ... screw, 103 ... boss, 105 ... screw, 106 ... memory card,
107 ... card socket, 108, 109 ... opening, 111 ... side terminal,
113 ... Terminal cover, 115 ... Screw, 117 ... ASIC (Integrated circuit),
119 ... Electronic circuit parts, 121 ... Heat transfer sheet, 123 ... Heat dissipation space,
123a ... Central space (first space), 123b ... Side space (second space),
125 ... energization protection sheet, 127 ... heat transfer opening, 129 ... slit,
131 ... Attached piece 133 ... Reinforcing rib 133a ... Vertical rib 133b ... Horizontal rib,
135 ... Pasting area, 137 ... Divided pasting area

Claims (2)

It is an unmanned aircraft equipped with electronic devices such as aerial photography cameras.
A plurality of propellers installed around the unmanned aircraft to generate lift and thrust by wind power,
A resin housing that is installed at a position lower than the position of the propeller and constitutes the outer shell of the electronic device, and
A control circuit board housed in the housing is provided.
The control circuit board is provided with an integrated circuit that generates heat as the electronic device operates.
The integrated circuit is an unmanned vehicle equipped with an electronic device, which is connected to an upper wall portion of the housing close to the propeller by a heat transfer portion. The housing includes a housing housing portion that houses the control circuit board and a lid that covers an opening of the housing housing portion.
A sealing member having rubber elasticity is provided between the housing accommodating portion and the lid body.
The unmanned flying object according to claim 1, wherein the heat-generating integrated circuit is connected to the lid of the housing by the heat transfer unit.

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