JPWO2019146431A1 - Flight equipment - Google Patents

Abstract

Provided is a flying device in which an arm is rotatably attached to a base base in consideration of transportation, and the strength of a connecting portion between the arm and the base base is sufficiently ensured. In the present invention, the arm connecting portion 13 for attaching the arm 11 to the body base 14 has the engaging structure 30 and the screw structure 31. The engagement structure 30 includes an engagement portion 32 rotatably attached to the rotation shaft 38 and an engaged portion 33 with which the engagement portion 32 engages. The screw structure 31 has a screw hole 34 and a screw 35. Further, the revolving range of the screw 35 of the screw structure 31 is restricted by the rotation shaft 38 of the engagement structure 30.

Description

  The present invention relates to a flying device, and more particularly, to a flying device capable of storing a bent arm.

  2. Description of the Related Art Conventionally, a flying device capable of flying unmanned in the air has been known. Such a flight device can fly in the air with the thrust of a propeller that is driven to rotate about a vertical axis.

  Examples of the application field of the flying device include a transportation field, a surveying field, and an imaging field. When applying a flying device to such a field, surveying equipment and photographing equipment are provided in the flying device. By applying the flight device to such a field, the flight device can be flown to an area where no one can access, and transportation, imaging, and surveying in such an area can be performed. An invention relating to such a flight device is described in Patent Document 1, for example.

  With reference to Patent Literature 1, a plurality of arms are provided on a base, and a motor and a rotor are installed at an outer end of each arm. Further, by forming the retracting mechanism on the base, each arm can be housed and protruded from the base. The retracting mechanism has a link mechanism including a link piece rotatable with respect to the base and an urging member. The base end of each arm is linked to a link mechanism.

JP 2017-109626 A

  However, in the flying device described in Patent Document 1 described above, each arm is rotatably attached to the base, but it is necessary to ensure a sufficiently large mechanical strength at a connection portion between the arm and the base. There was a difficult task. If the mechanical strength of the connection between the arm and the base is not sufficient, the arm will fall off the base while the flight device is flying, and the attitude control of the flight device will be impossible, and the arm etc. will fall. Therefore, there is a risk that the danger increases.

  In addition, if the strength of the connection between the arm and the base is low, the arm will be displaced unnecessarily during flight, and the predetermined lift cannot be obtained with the rotating wing attached to the tip of the arm, stabilizing the flight attitude. There were also issues that were difficult to make.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to attach an arm to a base base so as to be rotatable in consideration of transportation and to connect a portion between the arm and the base base. It is an object of the present invention to provide a flying device in which the strength of the aircraft is sufficiently ensured.

  A flight device of the present invention includes an airframe base, an arm extending from the airframe base to the periphery, and an arm connection portion connecting the arm to the airframe base, wherein the arm connection portion has an engagement structure. And a screw structure, wherein the engagement structure includes an engagement portion rotatably attached to a rotation shaft that passes through one of the arm side and the body base side; An engaged portion formed on one of the arm side and the body base side and engaged with the engagement portion, wherein the screw structure is one of the arm side and the body base side. And a screw rotatably attached to one of the arm side and the body base side, and the screw shaft of the screw structure is provided by the rotation shaft of the engagement structure. Restriction of screw retraction range And it features.

  Further, in the flight device of the present invention, the screw has a screw groove portion in which a screw groove is formed, and a screw engaged portion reduced in diameter so as to engage with the rotating shaft. I do.

  Further, in the flight device of the present invention, the engaging portion and the screw are formed on the arm side, and the engaged portion and the screw hole are formed on the body base side.

  In the flight device according to the present invention, a grip portion is formed at a rear end of the screw.

  Further, in the flight device of the present invention, the arm connection portion is disposed to face the engagement structure and the screw structure, and a rotation connection portion that rotatably connects the arm and the body base, It is further characterized by comprising:

  Further, in the flight device of the present invention, the arm connecting portion has an arm side connecting portion and a base side connecting portion, and one of the arm side connecting portion and the base side connecting portion is connected to the arm side. The contact portion is formed so as to protrude toward the other of the connection portion and the base-side connection portion.

  A flight device of the present invention includes an airframe base, an arm extending from the airframe base to the periphery, and an arm connection portion connecting the arm to the airframe base, wherein the arm connection portion has an engagement structure. And a screw structure, wherein the engagement structure includes an engagement portion rotatably attached to a rotation shaft that passes through one of the arm side and the body base side; An engaged portion formed on one of the arm side and the body base side and engaged with the engagement portion, wherein the screw structure is one of the arm side and the body base side. And a screw rotatably attached to one of the arm side and the body base side, and the screw shaft of the screw structure is provided by the rotation shaft of the engagement structure. Restriction of screw retraction range And it features. Therefore, the range of movement of the screw of the screw structure is restricted by the rotation shaft of the engagement structure, so that even if the screw is not penetrated into the screw hole, the screw is prevented from dropping. be able to. In addition, since the rotation shaft of the engagement structure is a member that rotatably supports the engagement portion, a dedicated member for preventing a screw from dropping can be omitted, and the configuration of the entire apparatus can be simplified. Can be.

  Further, in the flight device of the present invention, the screw has a screw groove portion in which a screw groove is formed, and a screw engaged portion reduced in diameter so as to engage with the rotating shaft. I do. Therefore, by reliably engaging the engaged portion of the screw with the rotating shaft, the effect of preventing the screw from dropping can be remarkable.

  Further, in the flight device of the present invention, the engaging portion and the screw are formed on the arm side, and the engaged portion and the screw hole are formed on the body base side. Therefore, the engagement of the engagement structure and the screwing operation of the screw structure can be facilitated.

  In the flight device according to the present invention, a grip portion is formed at a rear end of the screw. Therefore, the user can easily screw the screw into the screw hole by rotating the screw with the grip portion.

  Further, in the flight device of the present invention, the arm connection portion is disposed to face the engagement structure and the screw structure, and a rotation connection portion that rotatably connects the arm and the body base, It is further characterized by comprising: Therefore, when the flying device is carried, the arm can be folded at the rotary connection portion, so that the flying device can be carried in a compact state.

  Further, in the flight device of the present invention, the arm connecting portion has an arm side connecting portion and a base side connecting portion, and one of the arm side connecting portion and the base side connecting portion is connected to the arm side. The contact portion is formed so as to protrude toward the other of the connection portion and the base-side connection portion. Therefore, by making the protruding abutting portions abut, a portion where the arm-side connecting portion and the base-side connecting portion abut can be stably defined, and the strength of the arm connecting portion can be set to a designed value. .

It is a figure which shows the flying device which concerns on embodiment of this invention, (A) is a perspective view which shows the state which extended each arm, (B) is a perspective view which shows the state which retracted each arm. 1 is a block diagram illustrating a connection configuration of a flight device according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the flying device which concerns on embodiment of this invention, (A) is a perspective view which shows the connection part of an airframe base and an arm, (B) is sectional drawing of the part. It is a figure which shows the flying device which concerns on embodiment of this invention, and is an exploded perspective view which shows an arm connection part. It is a figure which shows the flying device which concerns on embodiment of this invention, and is an exploded perspective view which expands and shows an arm connection part. It is a figure which shows the flying device which concerns on embodiment of this invention, (A) and (B) are perspective views which show the arm connection part of a storage state from a different viewpoint.

  Hereinafter, the flight device 10 according to the present embodiment will be described with reference to the drawings. In the following description, the same members are denoted by the same reference numerals in principle, and the repeated description will be omitted. In the following description, the clockwise direction and the counterclockwise direction will be described. However, these directions are directions when the flying device 10 is viewed from above.

  FIG. 1 shows a flight device 10 of the present embodiment. FIG. 1A shows the flying device 10 in an extended state in which each arm 11 is extended outward, and FIG. 1B shows the flying device 10 in a retracted state in which the arm 11 is folded. The flying device 10 has the extended configuration shown in FIG. 1A when flying, and has the storage configuration shown in FIG. 1B in order to reduce the occupied volume during transportation and storage.

  With reference to FIG. 1A, a flight device 10 includes an airframe base 14, an arm 11 extending from a peripheral portion of the airframe base 14 to the periphery, a propeller 12 disposed at an outer end of the arm 11, Mainly. The flying device 10 uses a driving force generated by an engine or a motor to rotate the propeller 12 at a predetermined rotation speed, thereby enabling the propeller 12 to fly and float in the air.

  The fuselage base 14 is disposed at the center of the flight device 10, and houses an engine, a battery, a generator, a control device, various sensors, a fuel tank, and the like (not shown). The outer skin of the body base 14 is covered with a synthetic resin plate or a steel plate formed into a predetermined shape. A skid 16 that is in contact with the ground at the time of landing is attached to a lower portion of the fuselage base 14.

  The arm 11 extends from the body base 14 toward the periphery. The arm 11 is formed of, for example, a synthetic resin or a metal material formed in a cylindrical shape. Here, the four arms 11 are attached to the outer peripheral portion of the body base 14 at an equal angular interval of about 90 degrees from each other. Each arm 11 and the airframe base 14 are connected via an arm connection portion 13 configured to be rotatable along a circumferential direction when the flying device 10 is viewed from above. The specific configuration of the arm connection section 13 will be described later.

  A propeller 12 is rotatably installed at the upper end of each arm 11. The propeller 12 is rotated by a motor 17 attached to a lower part of the tip of each arm 11.

  FIG. 1B shows the flight device 10 in a retracted state in which the arm 11 is folded. Here, when the flight device 10 is viewed from above, each arm 11 is bent counterclockwise at the arm connection portion 13.

  By doing so, each arm 11 does not protrude to the side, and the four arms 11 surround the body base 14. Further, the propeller 12 described above is removed from the tip of each arm 11. By doing so, the amount of protrusion of each arm 11 to the outside is reduced, so that the volume occupied by the flying device 10 is reduced, and transport and storage of the flying device 10 are facilitated. Here, when transporting or storing the flying device 10, each arm 11 is folded instead of being removed. By doing so, the storing operation and the extending operation of each arm 11 can be simplified, and it is possible to prevent each arm 11 from being lost during storage or transport.

  The connection configuration of the flying device 10 will be described with reference to FIG. The flight device 10 includes an operation control device 21, a sensor 18, a communication device 22, an engine 20, a power generation unit 23, a battery unit 25, an output control device 24, a motor 17, and the like. .

  Here, the so-called series-hybrid type flying device 10 in which the power generation unit 23 generates electric power by the driving force of the engine 20 and each motor is rotated by the electric power generated from the power generation unit 23, thereby rotating the propeller 12 described above. Is shown. However, a so-called parallel hybrid type mechanism in which some of the propellers 12 are directly rotated by the driving force of the engine may be employed. Furthermore, an electric mechanism that does not have an engine and rotates each motor 17 only with the power of the battery unit 25 as a secondary battery can be employed.

  The sensor 18 senses the situation of the flying device 10 itself and its surroundings. Specifically, the sensor 18 includes a gyro sensor that measures an angle at which the flying device 10 is inclined, a compass that measures the direction of the flying device 10, a GPS sensor (Global Positioning System) that measures the position of the flying device 10, and flight. One or more of a barometric pressure sensor for measuring the altitude of the device 10 and an acceleration sensor for measuring the moving speed and the like of the flying device 10 are employed. Information indicating each physical quantity measured by the sensor 18 is transmitted to the operation control device 21.

  The communication device 22 can transmit and receive information to and from a not-shown ground communication device owned by an operator who operates the flying device 10 on the ground. When the operator operates the ground communication device, the altitude, traveling direction, moving speed, and the like of the flying device 10 can be controlled. Further, the operator can obtain the survey data and the video data obtained by the flying device 10 by receiving the information emitted from the communication device 22 by a ground communication device (not shown).

  The operation control device 21 includes an arithmetic device including a CPU (Central Processing Unit) and a storage device including a RAM (Random Access Memory) and a ROM (Read Only Memory), and controls the entire operation of the flying device 10. .

  The driving operation of the engine 20 is controlled by the operation control device 21, and the power generated by the power generation unit 23 drivingly connected to the engine 20 is supplied to the output control device 24.

  The output control device 24 has a power conversion circuit and the like, converts the power supplied from the power generation unit 23 into power suitable for causing the flying device 10 to fly, and then supplies the power to the motor 17. When changing the attitude of the flying device 10 in the air, the output control device 24 changes the power supplied to the motor 17 and the like based on the instruction of the operation control device 21. Here, a part of the electric power supplied from the power generation unit 23 to the output control device 24 is used for charging the battery unit 25 which is a rechargeable battery, and the electric power supplied from the battery unit 25 rotates the motor 17 and the like. You may let it.

  With reference to FIG. 3, a configuration of the arm connection unit 13 that connects the body base 14 and the arm 11 will be described. FIG. 3A is a perspective view showing the arm connecting portion 13, and FIG. 3B is a cross-sectional view taken along line BB of FIG. 3A. FIG. 3 shows a case where the arm 11 is in an extended state.

  Referring to FIG. 3A, the left end of arm 11 is connected to body base 14 via arm connection 13. The arm connection portion 13 includes an arm-side connection portion 41 attached to the left end of the arm 11 and a base-side connection portion 42 that partially protrudes the body base 14 outward. The arm-side connection portion 41 is a connection member attached to the left end of the arm 11, and is made of, for example, a cast metal.

  The end of the arm-side connection portion 41 on the far side on the paper surface is connected to the base-side connection portion 42 via the rotation connection portion 40. The end of the arm-side connection portion 41 on the near side in the drawing is connected to the base-side connection portion 42 via the engagement structure 30 and the screw structure 31. The arm-side connection portion 41 is connected to the base-side connection portion 42 via the engagement structure 30 and the screw structure 31, thereby firmly connecting the arm 11 to the body base 14 at the arm connection portion 13. Can be.

  Referring to FIG. 3 (B), the above-described rotation connection portion 40 is arranged on one side (upper side on the paper) of arm connection portion 13. Therefore, the arm 11 and the arm-side connection portion 41 can rotate the arm 11 clockwise around the rotation connection portion 40 to bring the arm 11 into the extended state, and rotate the arm 11 counterclockwise to rotate the arm 11. 11 can be in a stowed state.

  The engagement structure 30 and the screw structure 31 are arranged on the other side (the lower side on the paper) of the arm connection portion 13. The screw structure 31 includes a screw hole 34 and a screw 35. Here, the screw hole 34 is formed in the base-side connection portion 42, and the screw 35 is provided in the arm-side connection portion 41. The engagement structure 30 includes an engaged portion 33 and an engagement portion 32. Here, the engaged portion 33 is formed by partially depressing the base-side connection portion 42, and the engagement portion 32 is assembled to the arm-side connection portion 41. The configurations of the engagement structure 30 and the screw structure 31 will be described later in detail.

  Here, a screw groove portion 36 which is a tip portion of the screw 35 is screwed into a screw hole 34 formed in the base-side connection portion 42. Further, a grip portion 39 is attached to the rear end of the screw 35, and the user can screw the screw 35 into the screw hole 34 by rotating the grip portion 39. Further, the screw engagement portion 37 is formed by reducing the diameter of the intermediate portion of the screw 35, and the step portions formed at both ends of the screw engagement portion 37 engage with the rotating shaft 38. This restricts the movement of the screw 35 in the axial direction. This configuration will be described later.

  With reference to FIG. 4, the configuration and the like of the above-described arm connection portion 13 will be described in detail. FIG. 4 is an exploded perspective view showing a configuration in which the airframe base 14 and the arm 11 are connected via the arm connecting portion 13.

  The rotation connection part 40 is a member made of metal such as stainless steel, and is fixed to the rear side of the base-side connection part 42 of the body base 14 via fastening means such as screws. An engaged portion 33 and a screw hole 34 are formed on the front side of the base-side connection portion 42.

  The opening 26 is formed by partially opening the base-side connection portion 42. In the opening 26, a wiring or the like that is provided at the outer end of the arm 11 and supplies power to the motor 17 (not shown) is routed.

  The rotation shaft 29 is inserted through a hole that vertically penetrates the arm-side connection part 41 and a hole that penetrates the rotation connection part 40 in the vertical direction. With this configuration, the arm 11 and the arm-side connection portion 41 are in a state where the arm 11 and the arm-side connection portion 41 can rotate with respect to the base-side connection portion 42 of the body base 14.

  The rotation shaft 38 is inserted into the left end of the arm-side connection portion 41. The rotating shaft 38 also passes through the engaging portion 32 and the screw insertion portion 44. Therefore, the engagement portion 32 and the screw insertion portion 44 are rotatably provided around the rotation shaft 38 as a fulcrum. The configuration in which the rotation shaft 38 penetrates these members will be described later. The screw 35 is inserted into the screw insertion portion 44. An opening 53 is also formed in the arm-side connection portion 41, and wiring is routed through the opening 53.

  The left end of the arm 11 is fastened to the arm-side connection portion 41 via fastening means such as a screw. A propeller mounting portion 43 is mounted on the right end of the arm 11. The propeller 12 described above is mounted on the upper part of the propeller mounting part 43, and the motor 17 described above is mounted on the lower part of the propeller mounting part 43.

  With reference to FIG. 5, a configuration in which the screw 35 and the engaging portion 32 are attached will be described. First, the rotation shaft 38 vertically passes through the rotation shaft insertion hole 47 of the arm-side connection portion 41. Further, the rotation shaft 38 also penetrates the rotation shaft insertion hole 48 of the engagement portion 32. With this configuration, the engagement portion 32 rotates about the rotation shaft insertion hole 48 as a rotation center. Further, the rotation shaft 38 also penetrates the rotation shaft insertion hole 46 of the screw insertion portion 44. Here, in the prismatic screw insertion portion 44, the rotation shaft insertion hole 46 vertically passes through the screw insertion hole 45. With such a configuration, the rotation shaft 38 can be positioned on the side of the screw engagement portion 37 of the screw 35 inserted into the screw insertion hole 45. At the right end of the arm-side connection portion 41, a rotation shaft insertion hole 52, which is a hole for inserting the rotation shaft 29, is formed. Further, a screw insertion hole 51 which is a hole penetrating in the front-rear direction near the left end of the arm-side connection portion 41 is formed. The tip of the screw 35 penetrates the screw insertion hole 51.

  With reference to FIG. 6, the arm connection part 13 will be further described. FIGS. 6A and 6B are perspective views showing the arm connecting portion 13 in the retracted state.

  Referring to FIGS. 6A and 6B, in arm storage portion 13 in the retracted state, base-side connection portion 42 and arm-side connection portion 41 are separated in the rotation direction.

  Here, a contact portion between the base-side connection portion 42 and the arm-side connection portion 41 will be described. The contact surface 50 of the base-side connection portion 42 that contacts the arm-side connection portion 41 is a flat surface. On the other hand, on the surface of the arm-side connection portion 41 facing the base-side connection portion 42, a contact portion 49 is formed in which the arm-side connection portion 41 is partially protruded toward the base-side connection portion 42. . The contact part 49 is formed on the opposite side of the rotary connection part 40, and two are formed at the upper end and the lower end of the arm-side connection part 41. The protruding height of the contact portion 49 of the engine 20 is substantially equal.

  By forming the contact portion 49, the bonding strength between the arm-side connection portion 41 and the base-side connection portion 42 can be stably increased. Specifically, when the arm connection portion 13 is extended by rotating the arm connection portion 41 clockwise about the rotation connection portion 40, the contact portion 49 of the arm connection portion 41 becomes the base. It contacts the contact surface 50 of the side connection part 42. In such a case, since the length L10 between the rotary connection portion 40 and the contact portion 49 is ensured and long, the strength of the arm connection portion 13 can be ensured as designed as large.

  In order to shift the arm connection unit 13 from the extended state to the retracted state, first, the user rotates the screw 35 shown in FIG. The screw between the screw hole 36 and the screw hole 34 is released. By doing so, the screw 35 can be pulled out from the screw hole 34. Further, the engagement between the engagement portion 32 and the engaged portion 33 is released by rotating the engagement portion 32 counterclockwise about the rotation shaft 38 as a fulcrum. Next, by rotating the arm 11 attached to the arm-side connection portion 41, the arm 11 is rotated counterclockwise around the rotation connection portion 40 as a rotation center. By doing so, the arm connection section 13 is in the retracted state.

  Conversely, in order to shift the arm connection unit 13 from the retracted state to the extended state, first, the user rotates the arm 11 clockwise, thereby rotating the arm-side connection unit 41 clockwise. Then, referring to FIG. 6B, the contact portion 49 of the arm-side connection portion 41 comes into contact with the contact surface 50 of the base-side connection portion 42. Thereafter, referring to FIG. 3 (B), the user engages engaging portion 32 with engaged portion 33. Further, after inserting the screw 35 into the screw hole 34, the user turns the grip portion 39 to screw the distal end of the screw 35 into the screw hole 34. By performing such an operation, the arm-side connection portion 41 and the base-side connection portion 42 are firmly connected via the rotation connection portion 40, the engagement structure 30, and the arm-side connection portion 41.

  In the retracted state shown in FIG. 6B, the screw 35 is not screwed into the screw hole 34 of the base-side connection portion 42. Therefore, if no countermeasure is taken, the screw 35 is detached from the arm-side connection portion 41. There is a risk that it will. In the present embodiment, as shown in FIG. 3B, the rotating shaft 38 is brought into contact with the threaded engagement portion 37 in which the middle part of the screw 35 is reduced in diameter. Therefore, even if the screw 35 is to be detached to the outside, the detachment of the screw 35 is prevented by the rotation shaft 38 abutting on the step formed at both ends of the screw engaged portion 37. Therefore, it is possible to prevent the screws 35 from being lost while the flight device 10 is being stored or transported.

  As mentioned above, although the embodiment of the present invention was shown, the present invention is not limited to the above-mentioned embodiment.

  For example, referring to FIG. 3B, in the above-described embodiment, the engaged portion 33 and the screw hole 34 are provided in the base-side connection portion 42, and the engagement portion 32 and the screw 35 are provided in the arm-side connection portion 41. Although provided, this can be reversed. That is, the engaging portion 32 and the screw 35 may be provided in the base-side connecting portion 42, and the screw hole 34 and the engaged portion 33 may be formed in the arm-side connecting portion 41.

  Further, referring to FIG. 6 (B), contact portion 49 may be formed on base side connection portion 42, and a flat surface contacting contact portion 49 may be formed on arm side connection portion 41.

DESCRIPTION OF SYMBOLS 10 Flying device 11 Arm 12 Propeller 13 Arm connection part 14 Airframe base 16 Skid 17 Motor 18 Sensor 20 Engine 21 Operation control device 22 Communication device 23 Power generation unit 24 Output control device 25 Battery unit 26 Opening 29 Rotating shaft 30 Engaging structure 31 Screw structure 32 Engagement part 33 Engagement part 34 Screw hole 35 Screw 36 Screw groove part 37 Screw engagement part 38 Rotating shaft 39 Gripping part 40 Rotation connection part 41 Arm side connection part 42 Base side connection part 43 Propeller mounting Portion 44 Screw insertion portion 45 Screw insertion hole 46 Rotation shaft insertion hole 47 Rotation shaft insertion hole 48 Rotation shaft insertion hole 49 Contact portion 50 Contact surface 51 Screw insertion hole 52 Rotation shaft insertion hole 53 Opening

A flight device of the present invention includes an airframe base, an arm extending from the airframe base to the periphery, and an arm connection portion connecting the arm to the airframe base, wherein the arm connection portion has an engagement structure. , A screw structure, and a screw insertion portion , wherein the engagement structure includes an engagement portion rotatably attached to the arm by a rotation shaft passing therethrough, and the body base. And an engaged part with which the engaging part is engaged. The screw structure is provided with a screw hole formed in the body base, and is rotatably attached to the arm to partially shrink. A screw in which a threaded engagement portion is formed by having a diameter , wherein the screw insertion portion penetrates a screw insertion hole through which the screw is inserted, and the screw insertion hole through which the rotating shaft is inserted. A rotation shaft insertion hole, The threaded engagement of the screw, the rotation shaft by contact, characterized in that the reciprocating range of the screw is restricted.

A flight device of the present invention includes an airframe base, an arm extending from the airframe base to the periphery, and an arm connection portion connecting the arm to the airframe base, wherein the arm connection portion has an engagement structure. , A screw structure, and a screw insertion portion , wherein the engagement structure includes an engagement portion rotatably attached to the arm by a rotation shaft passing therethrough, and the body base. And an engaged part with which the engaging part is engaged. The screw structure is provided with a screw hole formed in the body base, and is rotatably attached to the arm to partially shrink. A screw in which a threaded engagement portion is formed by having a diameter , wherein the screw insertion portion penetrates a screw insertion hole through which the screw is inserted, and the screw insertion hole through which the rotating shaft is inserted. A rotation shaft insertion hole, The threaded engagement of the screw, the rotation shaft by contact, characterized in that the reciprocating range of the screw is restricted. Accordingly, the range of movement of the screw of the screw structure is restricted by the rotation shaft of the engagement structure, thereby preventing the screw from falling off even when the screw is not penetrated into the screw hole. be able to. In addition, since the rotation shaft of the engagement structure is a member that rotatably supports the engagement portion, a dedicated member for preventing a screw from dropping can be omitted, and the configuration of the entire apparatus can be simplified. Can be.

Claims (6)

Airframe base,
An arm extending from the fuselage base toward the periphery,
An arm connection unit for connecting the arm to the airframe base,
The arm connection portion has an engagement structure and a screw structure,
The engagement structure includes an engagement portion rotatably attached to a rotation shaft that penetrates one of the arm side and the body base side, and one of the arm side and the body base side. An engaged part formed on the other side and engaged with the engaging part,
The screw structure includes a screw hole formed on one of the arm side and the body base side, and a screw rotatably mounted on the other of the arm side and the body base side. ,
The flight device according to claim 1, wherein an advancing and retreating range of the screw of the screw structure is regulated by the rotation shaft of the engagement structure.   The flight device according to claim 1, wherein the screw has a screw groove portion having a screw groove formed therein, and a screw engaged portion reduced in diameter so as to be engaged with the rotation shaft. . The engagement portion and the screw are formed on the arm side,
The flight device according to claim 1, wherein the engaged portion and the screw hole are formed on the body base side.   The flying device according to claim 1, wherein a grip portion is formed at a rear end of the screw.   The said arm connection part is further provided with the rotation connection part arrange | positioned facing the said engagement structure and the said screw structure, and connecting the said arm and the said airframe base so that rotation is possible, The said arm connection part is characterized by the above-mentioned. The flight device according to any one of claims 1 to 4. The arm connection portion has an arm-side connection portion and a base-side connection portion,
A contact portion is formed by projecting one of the arm-side connection portion and the base-side connection portion toward the other of the arm-side connection portion and the base-side connection portion. The flight device according to any one of claims 1 to 5.

Images