Control device

Abstract

To improve heat dissipation in a control device to which an external terminal can be attached.SOLUTION: A control device according to the present invention is a control device to which an external terminal can be attached, and includes an electronic circuit board on which electronic components are mounted, an outer casing in whose internal space the electronic circuit board is arranged, a first heat dissipation sheet affixed to the surface of a heat-generating component among the electronic components, and a second heat dissipation sheet provided on the inner surface of the outer casing, and at least portions of the first heat dissipation sheet and the second heat dissipation sheet are in contact with each other, thereby enabling heat to transfer from the first heat dissipation sheet to the second heat dissipation sheet.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a technique for a control device used to control an unmanned vehicle. [Background technology]

[0002] When manually controlling an unmanned moving object such as a drone, it is desirable to be able to view images captured by a camera mounted on the drone. The captured image can also be viewed using a monitor device provided separately from the control device, but a configuration in which the image can be viewed on a display unit on the control device is preferable, as it eliminates the need to move one's gaze to the monitor device and the instability of operation during that time.

[0003] When a display unit is provided on the control device, the display unit may be incorporated into the control device itself, or an external terminal such as a tablet PC (Personal Computer) equipped with a display unit may be detachably attached to the control device.

[0004] If the control device is configured to allow an external terminal to be detachably attached, it is conceivable to use a connection cable for transmitting captured images received by the control device to the external terminal.

[0005] It is conceivable that the control device may be used outdoors. In that case, the control device may become hot due to the effects of direct sunlight, etc., and may not be able to maintain stable operation. The following Patent Document 1 discloses a configuration for dissipating heat from a control device to the outside using a heat dissipation fan or the like. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2012-152008 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, when considering outdoor use in bad weather, there is a risk of the control device breaking down if the air exhaust path of the heat dissipation fan is not sufficiently waterproofed. Furthermore, if a sealed structure or the like is adopted to improve waterproofing, the heat dissipation performance of the heat dissipation fan decreases, making it difficult to ensure stable operation.

[0008] The present proposal has been made against this background, and aims to improve the heat dissipation performance of a control device to which an external terminal can be attached. [Means for solving the problem]

[0009] The control device of the present invention is a control device to which an external terminal can be attached, and comprises an electronic circuit board on which electronic components are mounted, an outer casing in whose internal space the electronic circuit board is arranged, a first heat dissipation sheet affixed to the surface of a heat-generating component among the electronic components, and a second heat dissipation sheet provided on the inner surface of the outer casing, wherein at least portions of the first heat dissipation sheet and the second heat dissipation sheet are in contact with each other, thereby enabling heat to transfer from the first heat dissipation sheet to the second heat dissipation sheet. This allows heat generated by the electronic components on the electronic circuit board to be transferred to the outer casing via the first and second heat dissipation sheets. Effect of the Invention

[0010] According to the present invention, it is possible to improve heat dissipation in a control device to which an external terminal can be attached. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is an explanatory diagram of a communication system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of the control device according to the embodiment. [Diagram 3] FIG. 2 is an exploded perspective view showing an outer casing of the control device according to the embodiment. [Figure 4]FIG. 2 is a perspective view of the embodiment in a state where the control device and the tablet PC are separated. [Diagram 5] FIG. 2 is a plan view of the control device according to the embodiment. [Figure 6] FIG. 2 is a bottom view of the control device according to the embodiment. [Figure 7] 2 is an exploded perspective view showing a state in which an insulating sheet and a heat dissipation sheet are arranged inside an outer casing of the embodiment. FIG. [Figure 8] 5 is a diagram illustrating a window portion provided in an insulating sheet according to an embodiment, the window portion corresponding to a first heat dissipation sheet. FIG. [Figure 9] 13 is a diagram showing a state in which a second heat dissipation sheet of the embodiment is arranged to avoid a grip portion. FIG. [Figure 10] FIG. 13 is a diagram showing a state in which a gap is provided between the control device and the tablet PC according to the embodiment. [Figure 11] FIG. 11 is a diagram for explaining a second configuration example regarding the close contact between the first heat-dissipating sheet and the second heat-dissipating sheet in the embodiment. [Figure 12] FIG. 2 is a cross-sectional view of a PET sheet with adhesive according to an embodiment. [Figure 13] 11A and 11B are diagrams illustrating configuration examples of a height adjustment section and an insulating sheet when IC chips are mounted on both sides of an electronic circuit board according to an embodiment. [Figure 14] 11A and 11B are diagrams showing configuration examples of a height adjustment section and an adhesive PET sheet when IC chips are mounted on both sides of an electronic circuit board according to an embodiment. [Figure 15] 11A and 11B are diagrams showing a configuration for bending an adhesive-attached PET sheet when IC chips are mounted on both sides of an electronic circuit board according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described. In the following explanation, the control device 1 is referred to as being in the position when the user holds the control device 1 in front of his or her body, with the side with the controls and display screen being the top and the direction the user is facing being the front, and the directions up, down, front, back, left and right are indicated.

[0013] <1. System Overview> Figure 1 shows a drone 2 as an example of an unmanned mobile body, and a control device 1 used to control the drone 2. The communication system between the control device 1 and the drone 2 is a high-speed wireless transmission system capable of long-distance communication up to approximately 5 km.

[0014] A control signal is transmitted from the control device 1 to the drone 2 to control the flight of the drone 2 and the shooting operation of the camera 82 mounted on the drone 2. Image signals captured by the camera 82 and telemetry data from the drone 2 are transmitted from the drone 2 to the control device 1.

[0015] A tablet PC 3 is detachably attached to the control device 1. By connecting the control device 1 and the tablet PC 3 with a connection cable while the tablet PC 3 is attached to the control device 1, the control device 1 can transmit captured image data based on the image signal received from the drone 2 to the tablet PC 3 via a wired path. The tablet PC 3 can display the captured image data received from the control device 1. This allows the user, who is the pilot, to control the drone 2 while viewing the images captured by the camera 82 mounted on the drone 2.

[0016] The control device 1 can also be connected to, for example, an external monitor device 4, and can supply and display the image signal received from the drone 2. In addition, a memory card 5, for example, can be attached to the control device 1 as a storage medium, and captured image data based on the image signal received from the drone 2 can be stored in the memory card 5.

[0017] <2. Configuration of the control device> The structure of the control device 1 will be described with reference to FIGS. 2 and 5 show the control device 1 with the tablet PC 3 attached, FIG. 3 shows the control device 1 disassembled, and FIG. 4 shows the control device 1 with the tablet PC 3 removed.

[0018] The control device 1 includes a main body 10 formed in a box shape having an internal space Sp, with various components disposed inside and outside the main body 10 (see Figs. 2 and 3).

[0019] The main body 10 has an outer casing 42 that is made up of a lower case 40 that is open upward and an upper case 41 that closes the opening of the lower case 40 from above (see FIG. 3).

[0020] The outer casing 42 has a recess formed in the center thereof as an arrangement space 15 in which the tablet PC 3 is mounted.

[0021] The main body 10 includes a pair of rotation support parts 13 arranged laterally spaced apart from each other at approximately the center in the left-right direction of the front end part of the outer casing 42 .

[0022] The rotation support portion 13 holds both ends of a hold bar 12 for preventing the tablet PC 3 from falling out of the arrangement space 15 . The hold bar 12 is bent to fit the shape of the tablet PC 3, and each portion of the hold bar 12 comes into contact with the tablet PC 3, thereby functioning as a locking portion that prevents the tablet PC 3 from falling off.

[0023] The hold bar 12 is rotatable approximately upward relative to the outer casing 42 about a rotation axis in the direction in which the rotation support parts 13 are arranged (left-right direction).

[0024] The hold bar 12 is rotated upward from the state shown in Figure 4 to attach the tablet PC 3 to the arrangement space 15, and then the hold bar 12 is returned to its original state (rotated downward), so that the hold bar 12 holds the tablet PC 3 down as shown in Figure 2 to prevent it from falling off.

[0025] When the hold bar 12 is rotated downward, the middle portion 12a is fixed to a bar fixing portion 14 provided on the rear end side of the outer casing portion 42, thereby preventing the hold bar 12 from rotating, and the tablet PC 3 is maintained in a stable holding state.

[0026] The tablet PC 3 has a display screen 30 formed on the top surface of a substantially rectangular, plate-like body, and a terminal unit 31 for wired data transmission with the controller 1 is provided on the right side surface. The terminal unit 31 is provided with, for example, a USB (Universal Serial Bus) terminal.

[0027] A handle 11 is provided at the front end of the outer casing 42, and a user can easily carry the control device 1 by gripping the handle 11. In addition, strap holders 20 are provided on the left and right front ends and the left and right rear ends of the outer casing 42. By attaching straps attached to these strap holders 20 to the user's body, the user can position the control device 1 stably in front of the body.

[0028] The main body 10 has controls at various locations on the outer casing 42 that can be operated by the user. As shown in each of Figures 2 to 5, six operation switches 17 are provided on the left and right sides of the upper surface of the outer casing 42. The operation switches 17 are, for example, three-position alternate switches. The user can assign any operation function to each operation switch 17. For example, a shutter operation or zoom operation for the camera 82 may be assigned, or an operation related to piloting the drone 2 may be assigned.

[0029] In addition, for example, three joysticks 18 are provided on the upper surface side of the outer casing 42. The joysticks 18 are capable of stick operation and also function as push switches that can be pressed in. The pair of left and right joysticks 18 are used as controls for controlling the drone 2, for example, and the joystick 18 on the front right side of the upper surface is used as a control for operating the gimbal of the camera 82, for example.

[0030] In addition, a power switch 19 is provided on the upper surface side of the outer casing 42. A user can switch the control device 1 between an operating state and a non-operating state by switching the power switch 19 between an ON state and an OFF state.

[0031] The outer casing 42 of the main body 10 is provided with a plurality of antennas. As shown in FIG. 6, dipole antennas 21, 22, and 23 are provided on the underside of the main body 10, and patch antennas 24 and 25 are also provided. The dipole antennas 21, 22, and 23 are rotatable about shafts 21a, 22a, and 23a, respectively. The patch antennas 24 and 25 are also rotatable about shafts 24a and 25a, respectively.

[0032] 5 and 6 show a state in which each antenna (21, . . . , 25) is stored on the underside of the main body 10. In FIG.

[0033] The dipole antennas 21, 22, 23 and the patch antennas 24, 25 can be manually rotated as desired, allowing the user to adjust the reception conditions of image signals and telemetry data by moving each antenna. When the system is in operation, the user deploys each antenna (21, ..., 25) by rotating them, to optimally communicate with the drone 2.

[0034] In the internal space Sp of the outer casing 42, various electronic circuit boards 43, a battery 44, wiring members (not shown), and the like are arranged (see FIGS. 3 and 7).

[0035] Specifically, the lower case 40 has a deep bottom portion 45 in which components are placed and a shallow bottom portion 46 that is shallower than the deep bottom portion 45 .

[0036] The shallow bottom portion 46 is a portion in which the patch antennas 24 and 25 are stored, and the bottom is shallow in order to ensure storage space for the patch antennas 24 and 25.

[0037] Various electronic circuit boards 43, such as an RF board on which multiple IC (Integrated Circuit) chips 47, 47, ... that are boards that handle high frequency signals and tend to generate heat, are mounted, are disposed in the deep bottom portion 45. The IC chip 47 is, for example, an example of a heat-generating component.

[0038] A first heat dissipation sheet 48 (see FIG. 7) is attached to the surface (upper surface) of the IC chip 47. The first heat dissipation sheet 48 is made of, for example, thermally conductive silicone.

[0039] An insulating sheet 49 is further disposed above the electronic circuit board 43 on which the IC chip 47 to which the first heat dissipation sheet 48 is attached is mounted. The insulating sheet 49 is formed of, for example, a PET (Poly Ethylene Terephthalate) film.

[0040] The insulating sheet 49 is disposed so as to cover at least the electronic components mounted on the electronic circuit board 43. However, the insulating sheet 49 is formed by cutting out a portion located above the first heat dissipation sheet 48 (see FIG. 8). The cut-out portion of the insulating sheet 49 is formed as a window portion 50.

[0041] A second heat dissipation sheet 51 is attached to the lower case 40 of the outer casing 42 so as to cover the insulating sheet 49 from above (see FIG. 7). The second heat dissipation sheet 51 is formed of, for example, a graphite sheet.

[0042] The second heat-dissipating sheet 51 is attached so as to cover the entirety of the first heat-dissipating sheet 48. That is, the second heat-dissipating sheet 51 is in close contact with the entirety of the first heat-dissipating sheet 48 exposed through the window portion 50.

[0043] The second heat dissipation sheet 51 may be attached to the inner surface of the upper case 41 of the outer casing 42. In this case, the second heat dissipation sheet 51 is arranged so as to be in close contact with all of the first heat dissipation sheets 48 exposed from the window portion 50 when the upper case 41 is assembled to the lower case 40.

[0044] As a result, heat generated from heat-generating components such as IC chip 47 mounted on electronic circuit board 43 is transferred to upper case 41 via first heat dissipation sheet 48 attached to the surface of the components and second heat dissipation sheet 51 in close contact with first heat dissipation sheet 48.

[0045] Incidentally, the outer casing 42 has left and right areas in which the operation switch 17, joystick 18, power switch 19, etc. are arranged, which serve as grip parts 52 (parts surrounded by dashed lines in FIG. 9). A second heat dissipation sheet 51 is attached to the inner surface of the upper case 41, avoiding the grip portion 52 (see FIG. 9).

[0046] By attaching second heat dissipation sheet 51 while avoiding grip portion 52, heat is less likely to be transmitted to the user's hands, making it possible to maintain a comfortable operating environment.

[0047] A gap 53 is provided between the outer housing 42 and the tablet PC 3 (see FIG. 10). The tablet PC 3 is provided with feet 32, for example, at the four corners on the rear side. The gap 53 is provided by arranging the tablet PC 3 so that the feet 32 ​​contact the bottom surface 54 of the arrangement space 15 of the outer housing 42. This makes it easier for heat transferred to portions of the upper case 41 other than the grip portion 52 , in other words, to the bottom surface 54 of the arrangement space 15 , to be released from the gap 53 .

[0048] <3. Modifications of heat dissipation sheet> A second configuration example in which the first heat-dissipating sheet 48 and the second heat-dissipating sheet 51 are closely attached to each other will be described.

[0049] Unlike the above-mentioned example, the first heat dissipation sheet 48 in this modification is not formed in a shape that matches the surface area of ​​each IC chip 47. Specifically, as shown in Fig. 11, an adhesive-attached PET sheet 48A arranged to cover each electronic component mounted on the electronic circuit board 43 like the above-mentioned insulating sheet 49 functions as the first heat dissipation sheet 48.

[0050] The structure of adhesive-backed PET sheet 48A is shown in Fig. 12. Adhesive-backed PET sheet 48A comprises a PET layer 55, an adhesive layer 56 provided as an underlying layer thereof, and a release sheet 57 provided as an underlying layer thereof.

[0051] The adhesive layer 56 is formed of, for example, an acrylic adhesive.

[0052] The portion of the release sheet 57 that is to come into contact with the IC chip 47 is cut out and removed. The removed portion of the release sheet 57 is formed as a window portion 58. As a result, the adhesive layer 56 is exposed in the portion of the adhesive-attached PET sheet 48A facing the IC chip 47.

[0053] The adhesive layer 56 comes into contact with the IC chip 47, thereby bonding the PET layer 55 of the adhesive-attached PET sheet 48A and the IC chip 47 together.

[0054] In order to suppress a decrease in the efficiency of heat conduction from the IC chip 47 to the PET layer 55, it is desirable to form the adhesive layer 56 thinly so as not to exceed approximately one-tenth the thickness of the PET layer 55. Alternatively, the adhesive layer 56 may be formed using a material with high thermal conductivity.

[0055] The second heat dissipation sheet 51 is attached so as to cover the entirety of the adhesive-attached PET sheet 48A, similarly to the first embodiment. That is, the second heat dissipation sheet 51 transfers heat from the IC chip 47 via the adhesive-attached PET sheet 48A.

[0056] <4. Other Modifications> In the above examples, the configuration has been described for dissipating heat generated from IC chip 47 arranged on the upper surface side of electronic circuit board 43. However, in a mode in which IC chips 47 are mounted on both surfaces of electronic circuit board 43, a configuration may be adopted in which heat from IC chip 47 arranged on the lower surface side is transferred to upper case 41 via first heat dissipation sheet 48 and second heat dissipation sheet 51.

[0057] The IC chip 47 arranged on the upper surface side (upper case 41 side) of electronic circuit board 43 is referred to as upper IC chip 47A, and the IC chip 47 arranged on the lower surface side (lower case 40 side) is referred to as lower IC chip 47B.

[0058] At this time, for example, as shown in FIG. 13, height adjustment portion 59 made of thermally conductive silicone or the like may be formed on the upper surface side of the region on electronic circuit board 43 where lower IC chip 47B is formed.

[0059] In one configuration example of the first heat dissipation sheet 48 and the second heat dissipation sheet 51, as shown in FIG. 13, not only the first heat dissipation sheet 48 arranged on the upper surface of the upper IC chip 47A but also the height adjustment portion 59 are exposed upward from a window portion 50 formed in the insulating sheet 49 and are in close contact with the second heat dissipation sheet 51 (not shown).

[0060] In addition, in the second configuration example of the first heat dissipation sheet 48 and the second heat dissipation sheet 51, as shown in Figure 14, not only the upper IC chip 47A but also the height adjustment portion 59 is adhered to the adhesive layer 56 via a window portion 58 formed in the release sheet 57 of the adhesive-backed PET sheet 48A.

[0061] 13 and 14, it is only necessary to provide a heat dissipation member on one side of electronic circuit board 43, making it possible to reduce the number of parts and the number of assembly steps.

[0062] As a configuration for transferring heat generated in lower IC chip 47B to upper case 41, still another configuration is also possible. For example, as shown in FIG. 15, adhesive-backed PET sheet 48A is bent and attached from above to electronic circuit board 43, whereby adhesive layer 56 of adhesive-backed PET sheet 48A adheres closely to the upper surface of the area of ​​electronic circuit board 43 where lower IC chip 47B is formed, and heat is transferred to PET layer 55.

[0063] Similarly, in the first configuration example of the first heat dissipation sheet 48 and the second heat dissipation sheet 51, a window portion 50 may be provided in the insulating sheet 49 so as to face the region where the lower IC chip 47B is formed on the electronic circuit board 43, and the insulating sheet 49 and the second heat dissipation sheet 51 may be flexibly attached. This allows the second heat dissipation sheet 51 to be in close contact with the region where the lower IC chip 47B is formed via the window portion 50 of the insulating sheet 49, allowing the heat generated by the lower IC chip 47B to be efficiently released. Furthermore, in this case, the first heat dissipation sheet 48 may be attached to the upper surface side of the region where the lower IC chip 47B is formed on the electronic circuit board 43.

[0064] <5. Summary> As described above, the control device 1 of the present invention is a control device 1 to which an external terminal (tablet PC 3) can be attached, and includes an electronic circuit board 43 on which electronic components (such as IC chip 47) are mounted, an outer casing 42 in which the electronic circuit board 43 is disposed in an internal space Sp, a first heat dissipation sheet 48 (PET sheet 48A with adhesive, or its PET layer 55) attached to the surface of a heat-generating component (such as IC chip 47) among the electronic components, and a second heat dissipation sheet 51 provided on the inner surface of the outer casing 42. The first heat dissipation sheet 48 and the second heat dissipation sheet 51 are at least partially in contact with each other, thereby allowing heat to transfer from the first heat dissipation sheet 48 to the second heat dissipation sheet 51. As a result, heat generated by the electronic components on the electronic circuit board 43 is transferred to the outer casing 42 via the first heat dissipation sheet 48 and the second heat dissipation sheet 51 . Therefore, by dissipating heat from the outer casing 42, which has a large surface area, heat dissipation measures can be preferably taken without providing a large component such as a heat sink. In particular, in this configuration, heat dissipation sheets are provided on both the electronic component, which is a heat generating component, and the outer casing 42, which is a component to which heat is transferred, and these heat dissipation sheets are brought into contact with each other, thereby enabling efficient heat dissipation. The first heat dissipation sheet 48 may be made of, for example, thermally conductive silicone, and the second heat dissipation sheet 51 may be made of, for example, a graphite sheet. This makes it possible to utilize the high thermal conductivity to dissipate heat with high efficiency. In particular, in situations where the control device 1 is used outdoors, the control device 1 needs to be waterproof, which may result in a decrease in heat dissipation performance. Even in such a case, heat can be efficiently released to the outer casing 42 through the first heat dissipation sheet 48 and the second heat dissipation sheet 51, thereby improving heat dissipation performance without compromising waterproof performance. Furthermore, by using the heat dissipation sheet, it is not necessary to provide a fan, so that the outer casing 42 can be made smaller and quieter. Furthermore, by using a heat dissipation sheet with no moving parts, the occurrence of breakdowns is suppressed, and the lifespan of the control device 1 can be extended.

[0065] The outer casing 42 of the control device 1 is provided with a grip portion 52 that is held by the operator, and the second heat dissipation sheet 51 may be disposed in a portion of the outer casing 42 excluding the grip portion 52. This makes it difficult for heat generated by the heat-generating components to be transferred to the grip portion 52. Therefore, the operator can operate the control device 1 without feeling discomfort due to heat.

[0066] The outer casing 42 of the control device 1 is provided with an arrangement recess (arrangement space 15) in which an external terminal (tablet PC 3) is arranged, and a gap 53 may be provided between a bottom surface 54 of the arrangement recess and the external terminal (tablet PC 3). This allows heat transferred to the bottom surface 54 of the recessed arrangement portion to easily escape into the air, improving heat dissipation performance. In particular, if the external terminal (tablet PC 3) is equipped with a fan on the back, the fan can increase the flow speed of the air flowing through gap 53, making it possible to achieve efficient heat dissipation at bottom surface 54.

[0067] The control device 1 is provided with an insulating sheet 49 arranged to cover areas of the electronic circuit board 43 other than the area where the first heat dissipation sheet 48 is affixed, and the insulating sheet 49 may be arranged between the second heat dissipation sheet 51 and the electronic circuit board 43. This prevents the formation of an inappropriate current path through the heat dissipation sheet, preventing malfunctions in the pilot device 1. In addition, since the material of the heat dissipation sheet can be selected without relying on insulating materials, it is possible to improve heat dissipation performance.

[0068] The control device 1 may be provided with a locking portion (hold bar 12) that presses the external terminal (tablet PC 3) against the bottom surface 54. This makes it possible to stabilize the positional relationship between the external terminal (tablet PC 3) and the outer housing 42. That is, the state in which the gap 53 is generated between the external terminal (tablet PC 3) and the bottom surface 54 of the outer housing 42 can be stably maintained, thereby preventing a decrease in heat dissipation performance. Moreover, by adopting the above-mentioned structure for the locking portion, it is possible to protect the external terminal (tablet PC 3).

[0069] In the above, a drone is used as an example of an unmanned mobile body, however, in the present invention, the unmanned mobile body is not limited to the form of an unmanned aerial vehicle such as a drone, and may take the form of an unmanned aerial vehicle other than an aerial vehicle, such as a vehicle, a ship, a submarine, etc. [Explanation of symbols]

[0070] 1. Controls 3 Tablet PC (external device) 12 Hold bar (retaining part) 15 Placement space (placement recess) 42 Outer casing 43 Electronic Circuit Board 47 IC chips (electronic components, heat generating components) 48 First heat dissipation sheet 49 Insulation sheet 51 Second heat dissipation sheet 52 Grip section 53 Gap 54 Bottom Sp internal space

Claims

1. A control device to which an external terminal can be attached, An electronic circuit board on which electronic components are mounted; an outer casing having an internal space in which the electronic circuit board is disposed; a first heat dissipation sheet attached to a surface of a heat generating component of the electronic component; a second heat dissipation sheet provided on the inner surface of the outer casing; The first heat dissipation sheet and the second heat dissipation sheet are at least partially in contact with each other, thereby enabling heat transfer from the first heat dissipation sheet to the second heat dissipation sheet. Control device.

2. The outer casing is provided with a grip portion to be held by an operator, The second heat dissipation sheet is disposed in a portion of the outer casing excluding the grip portion. The control device according to claim 1.

3. the outer casing is provided with a placement recess in which the external terminal is placed, A gap is provided between the bottom surface of the placement recess and the external terminal. The control device according to claim 1.

4. an insulating sheet disposed so as to cover an area of ​​the electronic circuit board other than an area to which the first heat dissipation sheet is attached; The insulating sheet is disposed between the second heat dissipation sheet and the electronic circuit board. The control device according to claim 1.

5. A locking portion is provided to press the external terminal against the bottom surface. A control device according to claim 3.

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