Arm for drone and drone

Abstract

To provide an arm for a drone that is configured so that wiring can be easily connected to a member arranged at a tip of the arm.SOLUTION: An arm for a drone, which is mounted on an enclosure of a drone and whose tip part is mounted with another member, comprises an outer envelope having an opening for taking out wiring connected to the another member from the inside of the arm, and an extension part in which a peripheral edge of the opening is extended toward the inside of the outer envelope. The wiring arranged inside the outer envelope is bent at the extension part and is taken out from the opening.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an arm for a drone and a drone. [Background technology]

[0002] There is known a drone having a housing in which a battery and the like are arranged, a plurality of rotors for flying the drone, and an arm for holding the rotors at a position outside and away from the housing. Patent Document 1 describes an example of using a laminated structure made of a plurality of fiber-reinforced resin sheets with woven fibers as the material for such a drone arm, and a cylindrical body obtained by molding this laminated structure into a cylindrical shape. Patent Document 1 describes that the arm obtained by molding the laminated structure is lightweight and has high rigidity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-118530 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the drone described above, the motor for rotating the rotor is placed at the tip of the arm. The battery placed in the housing and the motor placed at the tip of the arm are connected by wiring that passes through the inside of the cylindrical arm.

[0005] The wiring is taken out from an opening in the cylindrical arm to the outside of the arm and connected to the motor. However, with conventional arms, the angle at which the wiring is taken out from the opening is not stable, making it difficult to connect the wiring to the motor.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide an arm for a drone that makes it easy to connect wiring to a component located at the tip of the arm, and a drone having such an arm for a drone. [Means for solving the problem]

[0007] One aspect of the present invention for solving the above problems relates to a drone arm as described below in [1] to [9]. [1] An arm that is attached to a drone housing and has a separate member attached to its tip, an outer shell having an opening for leading out wiring to the separate member from inside the arm; an extension portion extending a periphery of the opening toward the inside of the outer shell, The wiring arranged inside the outer shell is bent at the extension portion and taken out through the opening. Drone arm. [2] The extension portion has a height corresponding to a height at which the wiring is arranged inside the outer shell. [1] An arm for a drone. [3] The extension portion has a notch portion that holds the bent wiring. [1] or [2]. A drone arm according to the invention. [4] The extension portion has a curved end portion at a tip end in an extension direction, the end portion having a shape corresponding to the bending of the wiring. The drone arm according to any one of [1] to [3]. [5] The extension portion is integrally molded with the outer shell. A drone arm according to any one of [1] to [4]. [6] The body or the tip has a reinforcing rib therein, The extension portion is disposed in contact with the reinforcing rib. A drone arm according to any one of [1] to [5]. [7] The main body has a rod-like shape with at least one of its longitudinal faces being open. A drone arm according to any one of [1] to [6]. [8] The outer shell and the extension portion are Made of fiber reinforced resin containing reinforcing fibers and thermoplastic resin. A drone arm according to any one of [1] to [7]. [9] The outer shell includes a unidirectional layer including carbon fibers oriented in one direction and a thermoplastic resin, A drone arm according to any one of [1] to [8].

[0008] Another aspect of the present invention for solving the above problem relates to a drone as described below in

[10] .

[10] An arm for a drone according to any one of [1] to [9]; A separate member attached to the tip of the drone arm; A housing to which the drone arm is attached; a wiring that connects the housing and the separate member, the wiring being disposed inside the outer shell and taken out from the opening to the outside; Drone. Effect of the Invention

[0009] The present invention provides an arm for a drone that makes it easy to connect wiring to a component located at the tip of the arm, and a drone having the arm for a drone. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing the appearance of a drone according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the external appearance of the arm when viewed obliquely from above. [Diagram 3] FIG. 3 is a perspective view showing the external appearance of the arm when viewed from diagonally below. [Figure 4] FIG. 4 is a perspective view showing an exemplary configuration of the extension portion, illustrating the appearance of the periphery of the opening as viewed obliquely from below. [Diagram 5]FIG. 5 is a bottom view showing the appearance of the periphery of the opening as viewed from below, illustrating how wiring is taken out from the opening. [Figure 6] FIG. 6 is a side view of the arm showing how the wires coming out of the openings are connected to the motor. [Figure 7] FIG. 7 is a perspective view showing another exemplary configuration of the extension portion, illustrating the appearance of the periphery of the opening as viewed obliquely from below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [First embodiment] 1 is a schematic diagram showing the appearance of a drone according to an embodiment of the present invention. The drone 100 has a housing 110, a rotor unit 120, and a plurality of arms 130 (four in this embodiment).

[0012] The housing 110 has a box-shaped lower body 112 with an open top and a box-shaped upper body 114 with an open bottom. The lower body 112 and the upper body 114 are disposed with their respective open faces facing each other and are fastened to each other with a plurality of fastening screws 116. A battery (not shown) is disposed in the space inside the housing 110 (the space between the lower body 112 and the upper body 114) formed by the above fastening. The housing 110 is a monocoque structure that maintains its strength through its walls, which reduces unnecessary parts and reduces its weight.

[0013] In this embodiment, the housing 110 is a hollow box-shaped member having a substantially square shape in plan view with four curved sides bulging outward. Mounting parts 118 for mounting the arm 130 are disposed at the four ends of the substantially square shape. The mounting part 118 is a box-shaped part protruding in the extension direction of the arm 130, and an introduction port 1182 for guiding the wiring 410 from the battery to the arm is formed on the outside of the mounting part 118. The arm 130 is attached to the mounting part 118 via a hinge 420, and can be folded downward of the housing 110 by bending the hinge 420.

[0014] The rotor units 120 are disposed at the respective tips of the four arms 130. Each rotor unit 120 has a plurality of rotors 122 (two in this embodiment) and a motor 124 for rotating the rotors 122. The motor 124 is disposed at the tip of the arm 130. A wiring 410 extending from a battery disposed in the housing 110 is connected to the motor 124. The motor 124 rotates the rotor 122 by power supplied via the wiring 410.

[0015] The arm 130 is a rod-shaped member having a shape extending linearly outward from the housing 110. The arm 130 holds the rotor unit 120 at its tip. The arm 130 creates a predetermined distance between the rotor 122 and the housing 110, and between the rotors 122 arranged on each arm 130. As a result, the arm 130 prevents the rotating rotor 122 from colliding with the housing 110, and the rotating rotors 122 from colliding with each other. The arm 130 may be bent or flexed in the middle. In this embodiment, the arm 130 extends in a direction toward the outside from the center of gravity of the housing 110, but may extend in a direction having a predetermined angle with respect to the above-mentioned outward direction.

[0016] FIG. 2 is a perspective view showing the appearance of the arm 130 when viewed from an obliquely upward direction. FIG. 3 is a perspective view showing the appearance of the arm 130 when viewed from an obliquely downward direction. As shown in FIG. 2 and FIG. 3, the arm 130 has a main body 210 attached to the outside of the housing 110, and a flange 220 arranged on the outside of the main body 210. The main body 210 has a semi-cylindrical shape with an open lower surface. A flange 220 is arranged on the lower end of the side surface of the semi-cylindrical main body 210 along the extension direction of the main body 210 toward the side surface of the main body 210.

[0017] As shown in Figures 2 and 3, the main body portion 210 has a base portion 212 for attaching the arm 130 to the housing 110, an extension portion 214 extending outside the base portion, and a tip portion 216 connected to the tip of the extension portion 214, on which the rotor unit 120 is positioned.

[0018] The base portion 212 is a portion for attaching the arm 130 to the housing 110. In this embodiment, the base portion 212 is fastened to the hinge 420 by inserting a fastening screw 222b into a fastening hole 222a formed in the flange 222, and is attached to the housing 110 via the hinge. A base wall 211 is formed on the side of the base portion 212 that contacts the housing 110. An opening 211a is formed in the base wall 211 to introduce the wiring from the attachment portion 118 into the inside of the outer shell of the base portion 212.

[0019] Extension portion 214 is a connecting portion that linearly connects base portion 212 and tip portion 216, and has a shape that narrows toward tip portion 216. Extension portion 214 also has a shape that increases in height relative to housing 110, which serves as a reference, from base portion 212 toward tip portion 216. Extension portion 214 may have a shape that is bent or refracted midway.

[0020] The tip portion 216 has a holding portion 2161 having a circular shape in a plan view for holding the rotor unit 120, and a connection portion 2162 for connecting to the extension portion 214. The tip portion 216 has a shape in which the circular surface of the holding portion 2161 is horizontal to the housing 110 and the hinge 420. The holding portion 2161 is formed with a plurality of fastening holes 2161a (four in this embodiment) for fastening the rotor unit 120. Also, the connection portion 2162 is formed with an opening 216a for leading out the wiring 410 from the inside to the outside of the arm 130.

[0021] In this embodiment, a flange 220 is disposed on each of the root portion 212, the extension portion 214 and the tip portion 216.

[0022] In this embodiment, the flange 222 disposed at the base portion 212 has a larger protruding width toward the outside of the main body portion 210 than the flanges 224 and 226 disposed at the extension portion 214 and the tip portion 216, respectively. The flange 222 disposed at the base portion 212 has fastening holes 222a (shown in FIG. 2) into which fastening screws 222b (shown in FIG. 2) are inserted for attaching the arm 130 to the housing 110 via the hinge 420. The fastening holes 222a are nut members disposed at two locations, one at the front and one at the back, of each of the flanges 222 on both sides.

[0023] 2 and 3 has a main body 210 having a top surface and a side surface, and a flange 220 extending laterally from the lower end thereof, and has a hat-shaped cross section with an open bottom surface. The flange 220 extending laterally from the main body 210 increases the second moment of area of ​​the arm 130, thereby increasing its rigidity. However, the shape of the arm 130 is not limited to this shape, and for example, a flange may be disposed on a cylindrical main body.

[0024] As shown in FIG. 3, the arm 130 has ribs 320 (ribs 322, 324, and 326) extending toward the open surface (lower surface) on the inside of the outer shell 310 constituting the upper surface and side surface of the main body 210 (the root portion 212, the extension portion 214, and the tip portion 216). In this embodiment, the ribs 320 are reinforcing ribs provided to increase the rigidity of the main body 210 (particularly rigidity against stress in the torsional direction). The shape of the ribs 320 is not particularly limited. In this embodiment, the ribs 320 have a shape in which two plate-shaped ribs 320a and 320b are arranged to cross each other. Each plate-shaped rib is arranged obliquely with respect to the extension direction of the arm 130 so as to linearly connect the outer shell 310 constituting one side surface and the outer shell 310 constituting the other side surface, and crosses at the center axis of the arm 130.

[0025] In the extension portion 214, the angles that the plate-like ribs 320a and 320b make with respect to the extension direction of the arm 130 change along the extension direction of the extension portion 214. Specifically, on the side of the root portion 212 where the width of the extension portion 214 is wider, the angles that the plate-like ribs make with respect to the extension direction of the arm 130 (the acute angles among the angles that they make) are made larger. On the other hand, on the side of the tip portion 216 where the width of the extension portion 214 is narrower, the angles that the plate-like ribs make with respect to the extension direction of the arm 130 (the acute angles among the angles that they make) are made smaller. In this way, the arm 130 has the ribs 320 densely arranged on the side of the root portion 212 where higher rigidity is required, and on the other hand, the ribs 320 densely arranged on the side of the tip portion 216, thereby reducing the weight of the main body portion 210.

[0026] The height of each plate-like rib (the length from the junction between the outer shell 310 constituting the top surface and the plate-like rib to the lower end of the plate-like rib) is not particularly limited, but it is preferable that it is smaller than the height of the outer shell 310 constituting the side surface (the length in a straight line along the plate-like rib from the junction between the outer shell 310 constituting the top surface and the plate-like rib to the lower end of the outer shell 310 constituting the side surface).

[0027] At the connection part 2162 of the tip part 216, an opening 216a for taking out the wiring to the outside is formed in the outer shell 310. The wiring 410 introduced from the opening 211a of the base wall 211 to the inside of the base part 212 passes through the extension part 214, bends at the site of the opening 216a of the connection part 2162, and is taken out to the outside of the outer shell 310.

[0028] In this embodiment, at the portion where the wiring 410 is bent, the periphery of the opening 216a is extended inward of the outer shell 310 to form the extended portion 330. The extended portion 330 is a cylindrical member constituted by a standing wall formed perpendicular to the outer shell 310 that constitutes the top surface.

[0029] Fig. 4 is a perspective view showing an exemplary configuration of the extension portion 330, illustrating the appearance of the periphery of the opening 216a when viewed from an obliquely lower side. Fig. 5 is a bottom view showing the appearance of the periphery of the opening 216a when viewed from the lower side, illustrating how the wiring 410 is taken out from the opening 216a. Fig. 6 is a side view of the arm 130, illustrating how the wiring 410 taken out from the opening 216a is connected to the motor 124.

[0030] As shown in Fig. 5, wiring 410 that has extended along the bottom surface of rib 320 inside outer shell 310 is bent along the vertical wall of extension portion 330 on the housing 110 side. Then, the bent wiring 410 extends upward along the vertical wall and is taken out from opening 216a to the outside of outer shell 310. As shown in Fig. 6, a wiring port for motor 124 is disposed above opening 216a, and the taken out wiring 410 is connected to motor 124 without being bent.

[0031] The height of extension portion 330 (the length from the intersection of outer shell 310 constituting the top surface and extension portion 330 to the lower end of extension portion 330) is not particularly limited, but is preferably set to a height corresponding to the height at which wiring 410 is disposed inside outer shell 310. In the example shown in Fig. 4 and Fig. 5, the height of extension portion 330 is the same as the height at which wiring 410 is disposed. This makes it possible to make the angle at which the wiring is bent along extension portion 330 a gentle angle of about 90°, thereby suppressing damage to the wiring due to bending.

[0032] For example, by making the height of the opening 211a for receiving the wiring 410 provided in the base wall 211 the same as the height of the extension portion 330 (more specifically, the height at which the wiring is bent in the extension portion 330), the height at which the wiring 410 is arranged and the height of the extension portion 330 can be made the same. In addition, in this embodiment, the rib 320 has a portion 322a at the intersection of the plate-like rib 320a and the plate-like rib 320b, where the rib height is reduced, and the wiring 410 is fitted into this low-height portion 328a to hold the wiring 410. The height at which the holding portion that holds such wiring 410 holds the wiring (the length from the intersection of the outer shell 310 constituting the top surface and the plate-like rib to the portion where the low-height portion 328a holds the wiring) and the height of the extension portion 330 (more specifically, the height at which the wiring is bent in the extension portion 330) can be made the same as the height at which the wiring 410 is arranged and the height of the extension portion 330. The height of extension portion 330 does not need to be the same as the height of opening 211a or the height of low portion 328a. For example, when the height of opening 211a and the height of low portion 328a are different, the height of extension portion 330 may be set so that the position where the wiring is bent in extension portion 330 is on the straight line connecting them.

[0033] The cylindrical extension portion 330 has a constant opening width in the length direction (extension direction of the extension portion 214) and coincides with the width of the wiring 410 in the length direction. The extension portion 330 also has a constant opening width in the side direction (direction connecting the side surfaces of the outer shells) and coincides with the width of the wiring 410 in the side direction. As a result, the wiring 410 is held by the extension portion 330 so as to be in contact with the vertical wall of the extension portion 330 in the length direction and side direction. Therefore, when an impact is applied to the drone 100, the wiring 410 is unlikely to be displaced or pulled, and the wiring 410 is unlikely to be cut due to these.

[0034] Fig. 7 is a perspective view showing another exemplary configuration of the extension portion 330, illustrating the appearance of the periphery of the opening 216a as viewed from diagonally below. The extension portion 330 shown in Fig. 7 has a cutout portion 332 on the housing 110 side where the height of a part of the standing wall is reduced. In the example shown in Fig. 7, the wiring 410 is bent along the standing wall of the cutout portion 332.

[0035] The width of the cutout 332 in the side direction (the direction connecting the side faces of the outer shells) coincides with the width of the wiring 410 in the side direction. Therefore, the wiring 410 is fitted and held in the cutout 332 such that the top surface of the wiring 410 contacts the vertical wall of the cutout 332 and the side surfaces of the wiring 410 contact the tall vertical walls at both ends of the cutout 332.

[0036] 7, the cutout portion 332 holds the wiring 410. Therefore, when an impact is applied to the drone 100, the wiring 410 is unlikely to be displaced or pulled, and the wiring 410 is unlikely to be cut due to these.

[0037] Furthermore, when the extension portion 330 is arranged in contact with the rib 320 as in the case of the extension portion 330 shown in FIG. 7, the reinforcing effect of the rib 320 can be improved by the extension portion 330, and the strength of the extension portion 330 can also be improved by the rib 320.

[0038] In addition, in the extension portion 330 shown in Figs. 4 to 7, the lower end (the tip of the extension portion 330 in the extension direction) of the standing wall that contacts the bent wiring 410 (the standing wall of the extension portion 330 on the housing 110 side in Figs. 4 to 6, and the notch portion 332 in Fig. 7) is a curved end. This curved end is rounded with a curvature that corresponds to the curvature at which the wiring 410 is bent. By making the end into such a curved shape, it is possible to suppress wear due to friction of the wiring 410 that contacts the extension portion 330.

[0039] In the arm 130 of this embodiment having such a configuration, the wiring 410 can be taken out perpendicularly to the outer shell 310 via the extending portion 330 and the opening 216a. Therefore, the taken out wiring can be easily connected to the motor 124.

[0040] In addition, the arm has the wiring 410 held and fixed by the extension portion 330 (and the cutout portion 332). Therefore, when an impact is applied to the drone 100, the wiring 410 is unlikely to be displaced or pulled, and the wiring 410 is unlikely to be cut due to these.

[0041] Moreover, the arm 130 has a body part 210 in a semi-cylindrical shape with an open bottom surface. Furthermore, a part of the rib 320 is formed with a portion of different height to serve as a wire holder. With such a rod-like arm 130 with at least one of the longitudinal surfaces open, after the arm 130 is molded, it is easy to arrange the wire 410 from the open surface side (the lower side in this embodiment) and to insert it into the extension part 330 and take it out to the outside of the outer shell 310. This also makes it easy to connect the wire between the battery in the housing 110 and the motor 124 arranged at the tip part 216.

[0042] In the arm 130, the main body 210 (the root portion 212, the extension portion 214, and the tip portion 216), the flange 220 (the flange 222, the flange 224, and the flange 226), the rib 320 (the rib 322, the rib 324, and the rib 326), and the extension portion 330 are all integrally molded from a fiber-reinforced resin containing a thermoplastic resin and reinforcing fibers. By using a fiber-reinforced resin as the material, the arm 130 can be made lighter while increasing its rigidity. By using a thermoplastic resin, the arm 130 can be manufactured by a method such as press molding or injection molding, and the manufacturing efficiency is greatly improved. The thermoplastic resin may be derived from a fossil fuel, may be derived from a biomass material, or may be a mixture of these.

[0043] Examples of the thermoplastic resin include polyolefin resins such as polyethylene, polypropylene, polybutene, and poly4-methyl-1-pentene, polyamide resins, polyester resins, polystyrene resins, thermoplastic polyimide resins, polyamideimide resins, polycarbonate resins, polyphenylene ether resins, polyphenylene sulfide resins, polyacetal resins, acrylic resins, polyetherimide resins, polysulfone resins, polyether ketone resins, polyether ether ketone resins, polyarylate resins, polyether nitrile resins, vinyl chloride resins, ABS resins, and fluororesins.

[0044] Among these, polyamide resin and polyolefin resin are preferred because they are less likely to be damaged when struck by flying objects such as pebbles, and can increase the reliability of the arm 130. Furthermore, from the viewpoint of suppressing the deterioration of mechanical properties when the arm 130 absorbs water, polyolefin resin is more preferred, and polypropylene resin is even more preferred.

[0045] The thermoplastic resin may be a resin composition containing additives. Examples of the additives include known fillers (inorganic fillers, organic fillers), pigments, dyes, weather resistance stabilizers, heat resistance stabilizers, antistatic agents, antislip agents, antioxidants, antifungal agents, antibacterial agents, flame retardants, and softeners.

[0046] Examples of the reinforcing fibers include carbon fibers, glass fibers, aramid fibers, alumina fibers, silicon carbide fibers, boron fibers, and metal fibers, etc. Among these, from the viewpoint of low density, weight reduction of the arm 130, and further increase in the specific rigidity, carbon fibers and aramid fibers are preferable, and carbon fibers are more preferable.

[0047] From the viewpoint of increasing the rigidity of the arm 130, the fiber reinforced resin preferably has a unidirectional layer formed from a unidirectional sheet (UD sheet) in which reinforcing fibers (preferably carbon fibers) oriented in one direction are impregnated with a thermoplastic resin. The arm 130 may be a laminate having a plurality of unidirectional layers in which the reinforcing fibers are oriented in different directions. The arm 130 may also be a laminate having a random layer in which a plurality of sites in which the reinforcing fibers are oriented in one direction are arranged and the orientation of the reinforcing fibers differs for each of the plurality of sites, which is obtained from a random sheet obtained by randomly laying out UD sheets cut into chips and molding them. The arm 130 is preferably a laminate having two types of unidirectional layers, that is, an oriented layer in which the entire reinforcing fibers in the layer are oriented in one direction, and a random layer.

[0048] The arm 130 can be manufactured by placing a UD sheet or a random sheet pre-formed into the shape of the arm 130 in a mold and hot pressing it. According to the findings of the present inventors, by placing a random sheet on the opposite side of the rib 320 and the extension portion 330 and hot pressing it, it is also possible to manufacture an integrally molded body in which the rib 320 and the extension portion 330 also contain reinforcing fibers by making the reinforcing fibers of the random sheet penetrate into the rib.

[0049] [Other embodiments] It should be noted that the above-described embodiments are merely illustrative embodiments of the present invention, and it goes without saying that the present invention can take on various modified embodiments within the scope of the technical ideas disclosed in this specification.

[0050] For example, in the above embodiment, the arm is made of fiber-reinforced resin containing thermoplastic resin and reinforcing fibers, but the arm may be made of fiber-reinforced resin containing thermosetting resin and reinforcing fibers, or may be made of metal such as aluminum or steel.

[0051] Examples of the thermosetting resin that can be used at this time include epoxy resin, phenol resin, melamine resin, urea resin, diallyl phthalate resin, silicone resin, urethane resin, furan resin, ketone resin, xylene resin, thermosetting polyimide resin, unsaturated polyester resin, and diallyl terephthalate resin.

[0052] In the above embodiment, the arm has an open bottom, but a cover for protecting the wiring may be placed on the open surface of the main body. The cover may be flat or semi-cylindrical, bulging downward. The cover may be attached by forming an opening in the flange and inserting a fastening screw into the opening, or by using an adhesive.

[0053] In the above embodiment, the main body is semi-cylindrical with a curved surface, but it may be a rod-like shape of any shape, such as a triangular prism, a square prism, a hexagonal prism, a circular cylinder, or an elliptical cylinder. In any of these shapes, at least one of the faces along the longitudinal direction may be open. On the other hand, the main body does not have to have an open face along the longitudinal direction.

[0054] In the above embodiment, the arm holds a rotor unit at its tip, but the arm may hold a component other than the rotor unit at its tip. For example, the arm may hold a robot arm, a camera, a light-emitting component (such as an LED), etc.

[0055] Further, in the above embodiment, the arm is described as extending upward from the extending portion, but the arm may extend the wiring laterally or downward from the extending portion. [Industrial Applicability]

[0056] The drone arm according to the present invention is less susceptible to wiring displacement or disconnection due to impact, etc. Furthermore, the drone arm according to the present invention is easy to wire. Therefore, the drone arm according to the present invention facilitates mass production of drones. [Explanation of symbols]

[0057] 100 Drones 110 Cabinet 112 Lower Body 114 Upper Body 116 Fastening screw 118 Mounting part 1182 Introduction 120 Rotor Unit 122 rotor 124 Motor 130 Arm 210 Main body 211 Root wall 211a aperture 212 Root part 214 Extension section 216 Tip 216a aperture 2161 Holding part 2161a Fastening hole 2162 Connection 220, 222, 224, 226 flanges 222a Fastening hole 222b Fastening screw 310 Shell 320, 322, 324, 326 Ribs 320a, 320b Plate-shaped rib 328a Low height area 330 Extension 332 Notch 410 Wiring 420 Hinge

Claims

1. An arm that is attached to a housing of a drone and has a separate member attached to a tip thereof, an outer shell having an opening for leading out wiring to the separate member from inside the arm; an extension portion extending a periphery of the opening toward the inside of the outer shell, The wiring arranged inside the outer shell is bent at the extension portion and taken out through the opening. Drone arm.

2. The extension portion has a height corresponding to a height at which the wiring is arranged inside the outer shell. The drone arm according to claim 1 .

3. The extension portion has a notch portion that holds the bent wiring. The drone arm according to claim 1 .

4. The extension portion has a curved end portion at a tip end in an extension direction, the end portion having a shape corresponding to the bending of the wiring. The drone arm according to claim 1 .

5. The extension portion is integrally formed with the outer shell. The drone arm according to claim 1 .

6. The outer shell has a reinforcing rib on the inside thereof, The extension portion is disposed in contact with the reinforcing rib. The drone arm according to claim 1 .

7. The outer shell has a rod-like shape with at least one surface along the longitudinal direction being open. The drone arm according to claim 1 .

8. The outer shell and the extension portion are Made of fiber reinforced resin containing reinforcing fibers and thermoplastic resin. The drone arm according to claim 1 .

9. The outer shell includes a unidirectional layer including carbon fibers oriented in one direction and a thermoplastic resin. The drone arm according to claim 1 .

10. A drone arm according to any one of claims 1 to 9, A separate member attached to the tip of the drone arm; A housing to which the drone arm is attached; a wiring that connects the housing and the separate member, the wiring being disposed inside the outer shell and taken out from the opening to the outside; Drone.

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