JP6983002B2 - Antenna device with shake correction function - Google Patents

Description

The present invention relates to an antenna device with a sway correction function that can control the posture according to the sway when the sway occurs due to the influence of wind and rain.

The antenna device radiates an electric signal flowing through a conducting wire from an antenna into a space as a radio wave, or receives a radio wave in the space through an antenna and guides the electric signal to the conducting wire as an electric signal, and is used in various communication devices. As such an antenna device, for example, an antenna device installed in a relay station of a mobile phone communication network may be exposed to wind and rain and shake. If the attitude of the antenna changes due to this shaking, it will interfere with the transmission and reception of radio waves. Therefore, when the antenna shakes, it is required to control the posture of the antenna according to the shake.

As a technique for controlling the attitude of such an antenna, for example, there is one described in Patent Document 1. Patent Document 1 discloses a support device capable of controlling the attitude of a parabolic antenna mounted on an airship. In the antenna support device, for example, a rail-shaped track having the same curvature as the curved surface of the parabolic antenna is constructed in a grid shape, and two movers fixed to the parabolic antenna are slidable along the rail-shaped track. When the gyro sensor detects the shaking of the airship, the two movers slide along each of the rail-shaped tracks by a drive unit such as a step motor based on the detection signal to control the attitude of the parabolic antenna. It has become like.
Further, Patent Document 2 also describes a device for controlling the attitude of the antenna. In this device, both ends of a rod-shaped antenna are supported by a plurality of piezoelectric elements such as piezo elements, one of the piezoelectric elements is stretched and deformed to push up one end of the antenna, and the other piezoelectric element is contracted and deformed. The antenna can be tilted by pulling down the other end of the antenna.

Japanese Unexamined Patent Publication No. 2002-25517 JP-A-2007-166001

However, in a structure in which a rail-shaped track is constructed in a grid shape as described in Patent Document 1 and a mover is slid on each of them, the size tends to be large, and therefore, a small and inexpensive device is required. It is considered possible to reduce the size by using a piezoelectric element as described in Patent Document 2 as a drive source, but further miniaturization is required.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a small and inexpensive antenna device with a shake correction function capable of controlling the posture of an antenna according to a shake.

The antenna device with a shake correction function of the present invention includes a movable body having an antenna, a fixed body, and a swing support mechanism that swingably supports the movable body around a swing fulcrum on the central axis of the antenna. The swing drive mechanism includes a posture detection sensor that detects a change in posture due to the inclination of the central axis of the antenna, and a swing drive mechanism that swings the movable body based on the detection result of the posture detection sensor. Is provided on either one of the movable body or the fixed body and the magnet provided on the other of the movable body or the fixed body, and acts a driving force between the magnet and the magnet. The magnet and the coil, which are paired with each other in the facing state, face each other in at least one direction of the direction along the central axis of the antenna or the direction intersecting the central axis . The movable body has a holder fixed to the antenna, and a plurality of inclined surfaces are formed on the holder in a prismatic arrangement having a point on the central axis as an apex, and the inclined surfaces have a plurality of inclined surfaces. , The coil or one of the magnets is fixed .

Since the change in the attitude of the antenna can be detected by the attitude detection sensor and driven by the swing drive mechanism, even if the attitude of the antenna changes due to wind and rain, it can be controlled to maintain an appropriate attitude. .. In this case, since the swing drive mechanism is composed of a magnet and a coil, the size can be reduced at low cost.
It can also ensure support for the tilted arrangement of magnets and coils. In this case, if the pyramid has a quadrangular pyramid shape, two sets of coils and magnets can be arranged in two orthogonal directions.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the swing drive mechanism is in a state in which the facing direction of the magnet and the coil is inclined with respect to the center axis around the center axis. It should be arranged.

Since the magnet and the coil are arranged at an angle, the same driving force can be generated even if the radial dimension orthogonal to the central axis is smaller than when the magnet and the coil are arranged so as to be orthogonal to the central axis. can. When the center of gravity of the antenna is far from the swing fulcrum, it is preferable to provide a center of gravity position adjusting member (counterweight) on the side opposite to the center of gravity of the antenna via the swing fulcrum to balance the weight. By arranging the magnet and coil on the opposite side of the antenna via the swing fulcrum, the magnet or coil provided on the movable body can function as a counterweight, and a center of gravity position adjusting member is provided. However, the weight can be reduced and the weight increase can be suppressed. Further, since the weight of the movable body including the antenna can be reduced, the driving force of the swing driving mechanism required for swinging can be reduced.

In this case, the angle between the facing direction of the magnet and the coil and the central axis is preferably 45 °, and while the size is reduced in the radial direction, the weight balance of the movable body by the counterweight function of the magnet or the coil and the swing drive mechanism are used. The relationship with the driving force of can be optimized.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the antenna has a reflective surface having a concave curved surface from the center to the outside in the radial direction on the upper surface of the umbrella shape, and the swing fulcrum is the antenna. It is preferable that the antenna is arranged so as to overlap the inside of the antenna when viewed from a direction orthogonal to the central axis.

The center of gravity of the antenna and the swing fulcrum can be at the same position or close to each other. When the center of gravity of the antenna and the swing fulcrum are separated, it is necessary to provide a center of gravity position adjusting member so that the center of gravity of the movable body coincides with the swing fulcrum, but the center of gravity of the antenna and the swing fulcrum are the same. In the case of a position, the number of members for adjusting the position of the center of gravity with respect to the antenna can be reduced, and even if the positions are not the same, the number of members for adjusting the position of the center of gravity can be minimized if the positions are close to each other. Therefore, it is advantageous in reducing the size and weight of the device.

As a preferred embodiment of the shake correction function antenna device of the present invention, the swing support mechanism has two swings along a direction orthogonal to the central axis and orthogonal to each other when viewed from one end of the central axis. It is composed of a gimbal member that can swing around a moving shaft, and it is preferable that the intersection of both swinging shafts of the gimbal member is the swinging fulcrum.
In this case, the gimbal member is made of a spring material, and the swing fulcrum may move within the elastic range of the spring material.

If the antenna device described in Patent Document 1 is provided with a rail track and a sliding portion that accompanies swing, such as a mover, wear and the like occur, so that the antenna device cannot be used in a device that requires high durability. Further, when such a sliding mechanism is used, it is generally easy to increase the size. In the present embodiment, since the rocking support mechanism is composed of a gimbal member, there is no sliding portion when controlling the posture of the antenna, the durability is excellent, and it is also advantageous for miniaturization.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the magnet and the coil forming the set are at least one in two directions orthogonal to each other on the central axis when viewed from one end side of the central axis. It is good if they are provided in pairs.

Since one set of magnets and coils can swing the antenna in a specific direction and the other set of magnets and coils can swing in a direction orthogonal to that direction, these two sets By combining the drive of the magnet and the coil, the attitude of the antenna can be freely controlled.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the magnet and the coil forming the set are provided in an arrangement facing each other via the central axis in two sets in each of the two directions. It is good to be there.
Two sets of magnets and coils can generate a larger driving force in each direction, and the two sets are provided so as to face each other via the central axis, so that the weight balance of the movable body is good. Become.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the holder may be provided with a center of gravity position adjusting member that balances with the weight of the antenna via the swing fulcrum.
The position of the swing fulcrum can be adjusted to a position balanced with the weight of the antenna by the center of gravity position adjusting member so as to match the center of gravity of the movable body. As a result, the driving force of the swing drive mechanism required for swinging the movable body can be reduced. Further, even when the antenna is installed sideways, it is possible to ensure the support of the antenna and perform accurate shaking correction control.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, it is preferable that the magnet is provided on the fixed body and the coil is provided on the movable body.

Since the coil is generally lighter than the magnet, the weight of the movable body can be reduced as compared with the case where the magnet is provided on the movable body. Therefore, the driving force required for swinging the movable body can be reduced, and further miniaturization can be achieved.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, different magnetic poles are formed at both ends of the magnet in the swing direction, and the coil has effective sides facing each magnetic pole of the magnet. It is preferable that the magnet is formed orthogonal to the swing direction.

Since a driving force can be generated between each effective side of the coil and each magnetic pole of the magnet, the driving force required for swinging can be increased. Further, since different magnetic poles are arranged on one magnet and the effective sides of one coil face each other, the size of the device can be reduced as compared with the case where a plurality of magnets having different magnetic poles are provided.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the distance between the different magnetic poles of the magnet and the swing fulcrum is set to be substantially the same, and the coil has the different magnetic poles and the effective side. It may be provided so as to be bent so that the facing distances of the magnets are substantially the same.

When the magnet and the coil are formed in a flat plate shape without bending, when the movable body swings from the state where they face each other in parallel, one end approaches and the other end moves in a direction away from each other. do. Therefore, the driving force changes depending on the swing position. On the other hand, in the present embodiment, the distance between both magnetic poles of the magnet and the swing fulcrum is almost the same, and the effective side of the bent coil is provided so as to face each magnetic pole, so that the movable body is formed. The magnet and coil do not partially come too close or too far apart when rocked. Therefore, the change in the driving force due to the swing position can be reduced. Further, when compared with the same size, the size of the swing drive mechanism in the direction orthogonal to the central axis can be made smaller than that of the coil having a flat plate shape, which is advantageous for miniaturization of the device. It is also advantageous for reducing the power consumption of the device.

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the magnet has a plurality of small magnets arranged so as to have different magnetic poles at both ends in the swing direction, and the coil comprises a plurality of small magnets. It is preferable to have a plurality of small coils facing each of the small magnets of each magnetic pole.
Also in this case, since the driving force can be generated between the coil made of each small coil and the magnet made of small magnets having different magnetic poles, the driving force required for swinging can be increased. ..

As a preferred embodiment of the antenna device with a shake correction function of the present invention, the antenna and the fixed body are closed between the antenna and the swing support mechanism and the swing drive mechanism so as to be stretchable and deformable. A cover should be provided.
In this case, the cover may be a bellows-shaped cylinder.

Since the space between the antenna and the fixed body is blocked by the cover, waterproofness can be ensured even when used in an environment exposed to wind and rain, and durability to an external environment can be improved. Further, since the cover can be expanded and contracted and deformed according to the swing, it does not hinder the swing of the antenna. By making the cover a bellows-shaped cylinder, the waterproof structure can be simplified.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a small and inexpensive antenna device with a shake correction function capable of controlling the posture of an antenna according to the shake.

It is an exploded perspective view of the antenna device with a shake correction function of 1st Embodiment of this invention. It is a vertical cross-sectional view on a central axis which shows the assembled state of the antenna device of 1st Embodiment, and corresponds to the cross section along the line AA of FIG. It is a perspective view of the antenna device of 1st Embodiment in the state which the antenna and the cover are removed. It is a top view of the antenna device of 1st Embodiment. It is a schematic diagram seen from the side which shows the function of the reflective surface of an antenna. It is a perspective view of the gimbal member which is a rocking support mechanism. It is an exploded perspective view of the antenna device with a shake correction function of 2nd Embodiment of this invention. It is a vertical sectional view on a central axis similar to FIG. 2 which shows the assembled state of the antenna device of 2nd Embodiment. It is an exploded perspective view of the antenna device with a shake correction function of 3rd Embodiment of this invention. It is a vertical sectional view on a central axis similar to FIG. 2 which shows the assembled state of the antenna device of 3rd Embodiment. It is an exploded perspective view of the antenna device with a shake correction function of 4th Embodiment of this invention. It is a vertical sectional view on a central axis similar to FIG. 2 which shows the assembled state of the antenna device of 4th Embodiment. It is an exploded perspective view of the antenna device with a shake correction function of 5th Embodiment of this invention. It is a vertical sectional view on a central axis similar to FIG. 2 which shows the assembled state of the antenna device of 5th Embodiment. It is the same vertical sectional view as FIG. 8 which shows the modification which changed a part of the antenna device of 2nd Embodiment. It is a vertical cross-sectional view similar to FIG. 8 which shows another modification which further modified a part of the antenna device of 2nd Embodiment.

Hereinafter, embodiments of the antenna device with a shake correction function according to the present invention will be described with reference to the drawings.
In the following description, the three directions orthogonal to each other are the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, with + X on one side of the X-axis direction, -X on the other side, and the Y-axis. A + Y is attached to one side in the direction, −Y is attached to the other side, + Z is attached to one side in the Z-axis direction, and −Z is attached to the other side. Further, in FIG. 1 and the like, the umbrella-shaped antenna is oriented upward, and the upper side is one + Z side of the Z axis. The state shown in the vertical sectional view of FIG. 2 and the like is defined as the stationary state of the antenna, and among the shaking in each direction, the rotation around the X axis corresponds to so-called pitching (vertical shaking), and the rotation around the Y axis is It corresponds to so-called yawing (rolling). In the following, unless otherwise specified, this stationary state will be described.

<Overall structure of the first embodiment>
1 to 6 show a first embodiment.
The antenna device 100 with a shake correction function of the first embodiment swingably supports a movable body 20 having an antenna 10, a fixed body 30 fixed to various structures, and the movable body 20 to the fixed body 30. It is provided with a swing support mechanism 40 for swinging, a posture detection sensor 50 for detecting a change in the posture of the antenna 10, and a swing drive mechanism 60 for swinging the movable body 20 based on the detection result of the posture detection sensor 50. The various structures in which the antenna device 100 is installed include not only fixed structures such as steel towers and buildings, but also movable structures such as vehicles and ships. In the case of a fixed structure, the posture of the antenna 10 is controlled so as to correct the shaking when the antenna 10 shakes due to the influence of wind and rain, and in the case of a movable structure, the shaking due to the movement is controlled. The posture of the antenna 10 can be controlled so that the antenna 10 can always be arranged in a constant direction.
Hereinafter, these details will be described.

(Structure of antenna 10)
The antenna 10 is made of a metal plate such as aluminum, and is formed in an umbrella shape as a whole in the examples shown in FIGS. 1 and 2. As shown in FIG. 4, the antenna 10 is formed in a circular shape when viewed from one end on the + Z side in the axial direction, and the central portion of the circle protrudes toward the + Z side in the Z axis direction to form an apex. 11 is formed. The upper surface of the antenna 10 (the surface on the + Z side in the Z-axis direction) is formed in a concave curved surface shape from the apex portion 11 to the peripheral portion, and a concave curve connecting the apex portion 11 and one point of the peripheral portion is formed on the Z axis. It is the shape of a rotating body obtained by rotating it as a center. The upper surface of the antenna 10 having a concave curved surface is a reflecting surface 12 that reflects radio waves. In this antenna 10, the line connecting the apex portion 11 and the circular center of the peripheral edge is defined as the central axis C of the antenna 10. In the stationary state shown in FIG. 2 and the like, the central axis C of the antenna 10 coincides with the Z axis.

Then, as shown in FIG. 5, radio waves arriving from the periphery are reflected on the upper surface of the antenna 10 and concentrated at one point (focus F) on the central axis C of the antenna 10, and the focus F is focused on. It is a structure in which a radiator (also referred to as a radiator or a feeding unit) (not shown) is arranged.
Further, as will be described later, the movable body 20 and the fixed body 30 are arranged around the central axis C of the antenna 10 or an extension thereof. Therefore, this central axis C (including its extension line) is not only the central axis of the antenna 10 but also the central axis of the antenna device 100 in the stationary state shown in FIG. 2 and the like. In the following description, the central axis C may be described as the central axis C of the antenna device 100 in a stationary state. The central axis C in this stationary state coincides with the Z axis, and when the antenna 10 shakes, the central axis C tilts with respect to the Z axis.

(Structure of movable body 20)
The movable body 20 has an antenna 10 and a movable side holder 21 fixed to the back surface (the surface opposite to the reflective surface 12) side of the antenna 10.
In this embodiment, the movable side holder 21 is for holding the coil 61 of the swing drive mechanism 60, and is made of a non-magnetic synthetic resin. As the overall outer shape of the movable side holder 21, one point on the central axis C (Z axis) is the apex, and the pyramidal head that gradually expands toward the + Z side in the Z axis direction is orthogonal to the Z axis direction. It is formed in the excised shape. Therefore, the inclined surface 22 constituting the pyramid is arranged so as to gradually approach the central axis C as it goes downward (−Z side in the Z-axis direction). One coil 61 of the swing drive mechanism 60 is held on each of these inclined surfaces 22.

As will be described later, since the swing drive mechanism 60 has four sets consisting of a combination of the coil 61 and the magnet 62, the movable side holder 21 has a quadrangular pyramid shape so as to hold the four coils 61. These four inclined surfaces 22 are provided on one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction. Has been done. Further, since each coil 61 is an air-core coil, each inclined surface 22 is integrally provided with a convex portion 23 fitted in the central space of the coil 61. The convex portion 23 projects to a height larger than the thickness dimension of the coil 61.

Further, the inside of the movable side holder 21 is formed in a cavity, and a recess 24 is formed on the side facing the back surface of the antenna 10 (+ Z side in the Z-axis direction), leaving the peripheral edge portion 21a. The recess 24 functions as a relief portion for reducing the weight of the movable side holder 21 and preventing interference when the gimbal member 40, which will be described later, is deformed. Further, at the center of the movable side holder 21, a through hole 25 for inserting the shaft 32, which will be described later, is formed so as to communicate with the recess 24 and along the Z-axis direction.
The upper end of the peripheral edge portion 21a of the movable side holder 21 is fixed to the back surface of the antenna 10, and in this fixed state, the movable side holder 21 is movable on the central axis C (Z axis) hanging through the apex portion 11 of the antenna 10. The side holder 21 is aligned with the axis. Therefore, the four inclined surfaces 22 of the movable side holder 21 are arranged at the same height position on the Z axis around the central axis C (Z axis) at intervals of 90 °.
The movable side holder 21 is equipped with a posture detection sensor 50 such as a gyroscope for detecting a change in the posture of the antenna 10, and is attached to an upper control unit or the like via a flexible cable (not shown). It is electrically connected.

(Structure of fixed body 30)
The fixed body 30 has a bellows shape that surrounds the fixed side holder 31 to which the magnet 62 of the swing drive mechanism 60 is fixed, the shaft 32 supported by the fixed side holder 31, and the fixed side holder 31 and the antenna 10. It has a cover 300 made of a cylinder.
The fixed-side holder 31 includes a disk-shaped base 33 centered on the central axis C, a mountain-shaped block body 34 integrally formed on the upper surface of the base 33 (upper surface on the + Z side in the Z-axis direction), and the block body 34. It is composed of a mounting plate 35 for fixing the magnet 62 of the swing drive mechanism 60 to the block body 34.
The block body 34 faces the −Z side in the Z-axis direction with a point on the central axis C (Z-axis) as an apex on the disk portion 34a integrally formed on the −Z side in the Z-axis direction. The head of the pyramid, which gradually expands in accordance with the direction of the Z axis, is cut off at a plane orthogonal to the Z-axis direction. Then, the inclined surface 34b constituting the pyramid is arranged so as to gradually approach the central axis C toward the upper side (+ Z side in the Z axis direction). Further, one mounting plate 35 is provided on each inclined surface 34b.

The mounting plate 35 is fixed perpendicularly to each inclined surface 34b, and is gradually inclined away from the central axis C (Z axis) toward the + Z side in the Z axis direction. A rectangular parallelepiped magnet 62 is held at each corner formed by the inclined surface 34b of the block body 34 and the mounting plate 35. The block body 34 is made of synthetic resin, but the mounting plate 35 is made of a magnetic material such as an iron plate and also serves as a yoke for the magnet 62.
As will be described later, since the swing drive mechanism 60 has four sets consisting of a combination of the coil 61 and the magnet 62, the block body 34 is formed in a quadrangular pyramid shape so as to hold the four magnets 62. The four inclined surfaces 34b and the four mounting plates 35 fixed to each inclined surface 34b are one side + X in the X-axis direction, the other side −X in the X-axis direction, and one side + Y in the Y-axis direction. And is provided on the other side −Y in the Y-axis direction. The four mounting plates 35 in the fixed-side holder 31 and the four inclined surfaces 22 in the movable-side holder 21 are set to the same inclination angle, and one side in the X-axis direction + X and the other in the X-axis direction. Side-X, one side in the Y-axis direction + Y, and the other side in the Y-axis direction-Y are arranged parallel to each other.

Further, the base 33 and the disk portion 34a of the block body 34 are constructed in a structure in which they are laminated, and a circular space 33a is provided in the central portion of the base 33. On the other hand, in the block body 34, a hole portion 34c that penetrates the block body 34 and communicates with the vacant space 33a of the base 33 is formed on the central axis C along the Z-axis direction. The hole portion 34c has a cross section in a direction orthogonal to the Z-axis direction formed into a quadrangle having a size that matches the quadrangle formed by each side of the upper end of the inclined surface 34b.
In the shaft 32, a disk-shaped fixing portion 37 is integrally formed at the lower end (-Z side of the Z axis) of the shaft portion 36 arranged on the central axis C, and the upper end of the shaft portion 36 (+ Z in the Z axis direction). A disk-shaped mounting portion 38 is integrally formed on the side). The mounting portion 38 is formed to have a smaller diameter than the fixing portion 37. Then, the fixing portion 37 is fixed in a state of being fitted into the empty space 33a formed in the base 33, and the shaft portion 36 is upward (+ Z side in the Z-axis direction) from the rectangular hole portion 34c of the block body 34. It stands out.
In the embodiment, the base 33 is formed to have an outer diameter substantially the same as the outer diameter of the antenna 10.

(Structure of rocking support mechanism 40)
In this embodiment, the swing support mechanism 40 is composed of a gimbal member formed of a spring material. That is, as shown in FIG. 6, the gimbal member 40 has an outer ring portion 41, an intermediate ring portion 42, and an inner ring portion 43 arranged in triple concentric circles, and the outer ring portion 41 and the intermediate ring portion 42 are formed. The intermediate ring portion 42 and the inner ring portion 43 are connected to each other by the two connecting portions 44 along the X-axis direction, and the intermediate ring portion 42 and the inner ring portion 43 are connected to each other by the two connecting portions 45 along the Y-axis direction. In this case, in the no-load state, the triple ring portions 41 to 43 are arranged on the same plane, and the two connecting portions 44 along the X-axis direction are provided at positions facing each other by 180 ° in the circumferential direction, and are provided in the Y-axis direction. The two connecting portions 45 along the above are also provided at positions facing each other by 180 ° in the circumferential direction. That is, the two connecting portions 44 along the X-axis direction and the two connecting portions 45 along the Y-axis direction are each formed in a straight line, and are arranged orthogonally to each other in the X-axis direction and the Y-axis direction.

The inner ring portion 43 and the intermediate ring portion 42 can swing relative to each other around the X axis while twisting the connecting portion 44 along the X-axis direction, and the intermediate ring portion 42 and the outer ring portion 41 can swing in the Y-axis direction. It is possible to swing relative to the Y-axis while twisting the connecting portion 45 along the line. Therefore, by combining these swings in both the X-axis direction and the Y-axis direction, the inner ring portion 43 and the outer ring portion 41 swing around an arbitrary axis on a plane including the X-axis and the Y-axis. You can do it. That is, the connecting portion 44 along the X-axis direction and the connecting portion 45 along the Y-axis direction constitute the swing shafts S1 and S2, respectively.
The intersection on the extension of the swing axes S1 and S2 is the swing fulcrum P, and in this embodiment, as shown in FIG. 2, the antenna 10 is viewed from the direction orthogonal to the central axis C of the gimbal member 40. It is provided so as to overlap the inside of the antenna 10, and the center of gravity G of the antenna 10 and the swing fulcrum P coincide with each other on the Z axis (central axis S of the antenna 10).

The rocking support mechanism (gimbal member) 40 configured in this way is fixed in a state where the mounting portion 38 at the upper end (+ Z side of the Z axis) of the shaft 32 is fitted in the inner space of the inner ring portion 43, and the outer ring. The portion 41 is fixed to the back surface of the antenna 10. An inward flange 13 is integrally formed on the back surface of the antenna 10, and an outer ring portion 41 of the gimbal member 40 is provided between the inward flange 13 and the peripheral edge portion 21a of the movable side holder 21 of the movable body 20. In the sandwiched state, the inward flange 13, the peripheral edge portion 21a of the movable side holder 21, and the outer ring portion 41 of the gimbal member 40 are integrally fixed. The connecting portions 44, 45 of the gimbal member 40, the intermediate ring portion 42, and the inner ring portion 43 are arranged inside the connecting portion 44, 45 without contacting the inward flange 13 or the like, and are suspended above the recess 24 of the movable side holder 21. It is supported by the state.

(Structure of rocking drive mechanism 60)
The swing drive mechanism 60 is a magnetic drive mechanism that uses a coil 61 and a magnet 62. Four sets of the coil 61 and the magnet 62 are provided at intervals of 90 ° in the circumferential direction of the movable side holder 21. Among them, each coil 61 is inclined at one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction of the movable side holder 21 described above. Each is held on the surface 22. Each coil 61 is an air-core coil having no magnetic core, and each coil 61 is formed to have the same shape and the same dimensions. In this case, each coil 61 is wound in an annular shape around an axis in the direction orthogonal to the inclined surface 22 when viewed in a direction orthogonal to the inclined surface 22 of the movable side holder 21. , It is formed so that the front view becomes a trapezoidal rectangular frame. Then, the long side (upper side) 61a of the trapezoid is arranged at the upper end of the inclined surface 22 of the movable side holder 21, the short side (lower side) 61b is arranged at the lower end of the inclined surface 22, and these long sides 61a are arranged. The shape is such that the short side 61b and the short side 61b are connected by two hypotenuses. The long side 61a and the short side 61b are arranged in parallel with the direction orthogonal to the Z axis. Further, the coil 61 is positioned by fitting the convex portion 23 provided on each inclined surface 22 of the movable side holder 21 into the inner space of each coil 61. The tip surface of each convex portion 23 is in a state of protruding from the surface of the coil 61.
A flexible cable (not shown) is connected to each coil 61, and is electrically connected to an upper control unit or the like.

On the other hand, the magnet 62 is formed in a rectangular parallelepiped block shape, and is fixed one by one to the corner portion formed by each inclined surface 34b of the fixed side holder 31 and the mounting plate 35. Each magnet 62 is arranged so that one surface of a rectangular parallelepiped faces parallel to the surface of the coil 61 in the movable side holder 21. The surface of the magnet 62 facing the coil 61 of the movable side holder 21 is magnetized on different magnetic poles 62a and 62b at the upper end and the lower end. Specifically, as described above, the long side 61a and the short side 61b of the coil 61 are arranged at the upper end and the lower end of the inclined surface 22 of the movable side holder 21, and the magnetic poles 62a and 62b of the magnet 62 are respectively arranged. Are arranged so as to face each of the long side 61a and the short side 61b of these coils 61. Therefore, the long side 61a and the short side 61b of the coil 61 facing the magnetic poles 62a and 62b of the magnet 62 are regarded as effective sides for generating an electromagnetic force as described later. The magnetizing polarization line 62c between the magnetic poles 62a and 62b is formed in parallel with both effective sides 61a and 61b of the coil 61, and when not excited, the magnetizing polarization line 62c is between both effective sides 61a and 61b of the coil 61. It is arranged in the middle position in parallel with the direction orthogonal to the Z axis.

As shown in FIG. 2, in the swing drive mechanism 60 including the coil 61 and the magnet 62, the coil 61 and the magnet 62 are opposite to the antenna 10 via the swing fulcrum P in the Z-axis direction. It is provided in.
Further, as will be described later, the movable body 20 swings with respect to the swing fulcrum P, but the coils 61 have effective sides 61a and 61b arranged on both ends in the swing direction orthogonal to the swing direction, and magnets. In 62, different magnetic poles 62a and 62b are arranged on both ends in the swing direction.

(Structure of cover 300)
In this embodiment, the cover 300 is formed of a bellows-shaped cylinder, and is provided in a state in which the peripheral edge portion of the base 33 of the fixed side holder 31 and the peripheral edge portion of the antenna 10 are connected to each other. Therefore, the bellows-shaped cylinder (cover) 300 is provided along the central axis C. The bellows-shaped cylinder 300 can be expanded and contracted as a whole along the central axis C, and the upper edge fixed to the antenna 10 is inclined with respect to the lower edge fixed to the base 33. It is also possible to expand and contract as it does.

(Action)
In the antenna device 100 configured in this way, when the antenna 10 shakes, the posture detection sensor 50 detects the change in the posture of the antenna 10 due to the shake, and the swing drive mechanism 60 is based on the detection result. By energizing the coil 61 of the above, the movable body 20 can be swung to correct the shaking. Specifically, a driving force (electromagnetic force) is generated according to Fleming's left-hand rule by passing a current through each coil 61 in a magnetic field extending from one magnetic pole to the other magnetic pole of the magnet 62, and both effective sides 61a. , 61b, the movable side holder 21 is attached to the fixed side holder 31 which is the fixed body 30 by the electromagnetic force generated between the magnet 62 and the swing shaft S1 or S2 of the gimbal member (swing support mechanism) 40. Alternatively, it is swung around both axes to control the posture of the antenna 10 integrated with the movable side holder 21. In FIG. 2, the antenna 10 swings around the swing fulcrum P, for example, as shown by a two-dot chain line. It is a drive mechanism using a coil 61 and a magnet 62 without using an expensive actuator, and can be manufactured at low cost.

In this case, since the convex portion 23 of the movable side holder 21 is provided so as to project from the inner space of the coil 61, when the swing angle of the antenna 10 becomes large, the convex portion 23 of the movable side holder 21 comes into contact with the magnet 62. .. When the convex portion 23 comes into contact with the magnet 62, the swing range is restricted. In the embodiment, for example, the convex portion 23 can freely swing within a range of ± 6 °, and the convex portion 23 comes into contact with the magnet 62 when the swing range greatly exceeds the swing range.

Further, the center of the inner ring portion 43 of the gimbal member 40, in other words, the center of the disc-shaped mounting portion 38 on the upper side of the shaft 32 becomes the swing fulcrum P, and the swing fulcrum P and the center of gravity G of the antenna 10 are the same. Since it is arranged at the position, the driving force required for rocking can be small, and the overall size and weight can be reduced. Since the movable side holder 21 and the coil 61 are fixed to the antenna 10, strictly speaking, the center of gravity of the movable body 20 is slightly different from the center of gravity G of the antenna 10, but in this antenna device 100, the center of gravity G is slightly different. The antenna 10 made of a metal such as aluminum is the heaviest component, and therefore, the center of gravity of the movable body 20 and the center of gravity G of the antenna 10 coincide with each other, or even if they do not match, they are provided very close to each other.
Since the gimbal member 40 is made of a spring material, it may bend due to the weight of the movable body 20. Therefore, the swing fulcrum P may shift to the + Z side or −Z side in the Z-axis direction from the center position of the gimbal member 40 shown in FIG. In the example shown in FIG. 2, the outer ring portion 41 of the gimbal member 40 may shift to the −Z side in the Z-axis direction with respect to the swing fulcrum P.

Further, the coil 61 and the magnet 62 constituting the swing drive mechanism 60 are in a state in which the facing direction of the coil 61 and the magnet 62 is inclined with respect to the central axis C around the central axis C of the antenna 10. Since they are arranged in the horizontal direction, the same driving force can be generated even if the radial dimension orthogonal to the central axis C is smaller than in the case of arranging them in the horizontal direction orthogonal to the central axis C.
Further, these coils 61 and the magnet 62 are each set on one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction. It is provided so as to face each other in the X-axis direction and the Y-axis direction via the central axis C. Therefore, a large driving force can be generated by the combination of these two sets of the coil 61 and the magnet 62, and the weight balance of the movable body 20 is provided by being provided so as to face each other via the central axis C. It also improves, and stable shaking correction can be performed.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention, and the following embodiments can be used.
Hereinafter, the second and subsequent embodiments will be described, but even if the shapes are different from those of the first embodiment, the same reference numerals may be given to elements having the same or similar functions to simplify the description. .. In addition, there are parts shown by simplifying a part of the figure (for example, the shape of the antenna) and parts omitted (for example, a convex part that fits in the inner space of the air core coil), and the first embodiment is referred to as necessary. ..

<Second Embodiment>
7 and 8 show the second embodiment.
In the first embodiment, the swing fulcrum P of the gimbal member 40, which is the swing support mechanism, and the center of gravity G of the antenna 10 are provided so as to coincide with each other on the central axis C (Z axis). In the device 101, the swing fulcrum P of the gimbal member 40 is provided so as to be separated from the center of gravity G of the antenna 10 in the Z-axis direction. Further, contrary to the first embodiment, the coil 61 of the swing drive mechanism 60 is provided on the fixed body 30, and the magnet 62 is provided on the movable body 20.
Specifically, four inclined surfaces 22 are formed at the lower part of the movable side holder 21 fixed to the antenna 10 as the movable body 20 so as to form a quadrangular pyramid with the vertices arranged downward, and the movable side. A quadrangular cylindrical strut portion 27 is integrally provided on the upper portion of the holder 21. Further, a hole 27a in a penetrating state is provided in the center of the movable side holder 21 on the central axis C, and the weight 28 as a center of gravity position adjusting member is fitted in the lower end of the hole and fixed. Has been done. Therefore, in this second embodiment, the movable body 20 includes an antenna 10, a movable side holder 21, and a weight 28.

Then, a plate-shaped magnet 62 is fixed to each inclined surface 22 of the movable side holder 21, and a gimbal member 40 as a swing support mechanism is fixed to the support column 27 at an intermediate position in the height direction of the movable side holder 21. There is. Since the movable side holder 21 is made of synthetic resin, a plate-shaped yoke 63 is provided on the back surface of the magnet 62, and the magnet 62 is fixed to the movable side holder 21 integrally with the yoke 63. In the magnet 62, different magnetic poles 62a and 62b are arranged at the upper end portion and the lower end portion via the magnetizing polarization line 62c parallel to the direction orthogonal to the Z axis.

On the other hand, in the fixed side holder 31 of the fixed body 30, four blocks 71 are integrally provided on the disk-shaped base 33 at intervals of 90 ° around the Z axis, and the four blocks 71 are integrally provided on the upper surface of each block 71. , Four inclined surfaces 72 are formed so as to form a quadrangular pyramid centered on one point on the Z axis. In other words, these inclined surfaces 72 are arranged so as to gradually separate from the Z axis toward + Z of the Z axis, and one coil 61 is fixed to each inclined surface 72. These coils have their effective sides 61a and 61b arranged at the upper end and the lower end of the inclined surface 72. Further, an octagonal frame-shaped portion 73 is integrally fixed to the fixed side holder 31 so as to connect the upper ends of the blocks 71.

The gimbal member (swing support mechanism) 40 is formed in a triple ring shape of an outer ring portion 41, an intermediate ring portion 42, and an inner ring portion 43, and the ring portions 41 to 43 are connected in the X-axis direction by the connecting portions 44 and 45. Alternatively, although they are connected in the Y-axis direction, since the support column 27 of the movable side holder 21 is formed in a square cylinder shape, the inner ring portion 43 is a rectangular frame fixed to the outer peripheral portion of the support column 27. Since the outer ring portion 41 is fixed to the frame-shaped portion 73 of the fixed-side holder 31, it is formed in the same octagonal frame shape as the frame-shaped portion 73.
In the antenna device 101 of the second embodiment, since the gimbal member 40 is provided at a distance from the center of gravity G of the antenna 10 in the Z-axis direction, the lower end portion of the movable side holder 21 (-Z side in the Z-axis direction). ) Is provided with a weight 28 for balancing the weight with the antenna 10.

Also in the antenna device 101 of the second embodiment, as in the first embodiment, when the antenna 10 shakes, the coil 61 is energized to generate an electromagnetic force according to Fleming's left-hand rule. The movable side holder 21 is attached to the fixed side holder 31 which is the fixed body 30 by the electromagnetic force generated between the both effective sides 61a and 61b and the magnet 62, either of the swing shafts S1 and S2 of the gimbal member 40. It swings around both axes to control the posture of the antenna 10 integrated with the movable side holder 21.

In this second embodiment, the magnet 62 is provided on the movable side holder 21, but since the magnet 62 is generally heavier than the coil 61, the magnet 62 can exert the function of the counterweight by that amount. , The center of gravity position adjusting member (weight) 28 can be made smaller. The center of gravity of the movable body 20 including the antenna 10 is provided at a position coincided with the swing fulcrum P.
As in the case of the first embodiment, since the coil 61 and the magnet 62 are arranged around the central axis C in a state in which the facing direction of the coil 61 and the magnet 62 is inclined with respect to the central axis C. Compared to the case where these facing directions are arranged in a horizontal state orthogonal to the central axis C, the same driving force can be generated even if the radial dimension orthogonal to the central axis C is small, which is advantageous for miniaturization. ..

<Third Embodiment>
9 and 10 show a third embodiment.
In the antenna device 102 of the third embodiment, two small magnets 62A and 62B are fixed to the lower end of the movable side holder 21 in the movable body 20, and two inclined surfaces 22a and 22b having different inclination angles are Z. A total of eight surfaces are formed around the axis at intervals of 90 °, and a square tubular support portion 27 is integrally provided at the upper end portion of the movable side holder 21. As a whole, the inclined surfaces 22a and 22b are inclined in a direction gradually approaching the Z axis toward the −Z side of the Z axis, but are arranged on the upper side (+ Z side) in the Z axis direction. The surface 22a and the lower inclined surface 22b arranged on the lower side (−Z side) in the Z-axis direction are continuous. The inclination angle with respect to the Z axis is set to be larger on the lower inclined surface 22b than on the upper inclined surface 22a.
The small magnets 62A and 62B are divided into an upper magnet 62A fixed to the upper inclined surface 22a and a lower magnet 62B fixed to the lower inclined surface 22b. It is preferable that the small magnets 62A and 62B are set to have substantially the same distance from the swing fulcrum P.

On the other hand, on the fixed side holder 31 of the fixed body 30, four blocks 71 are integrally provided on the disk-shaped base 33 at intervals of 90 ° around the Z axis. On the upper surface of each block 71, an upper inclined surface 72a arranged on the upper side (+ Z side) in the Z axis direction and a lower inclined surface 72b arranged on the lower side (−Z side) in the Z axis direction are Z-axis. A coil 61 having a shape continuous in the direction and bent so as to be aligned with both inclined surfaces 72a and 72b continuous in the Z-axis direction is provided across both inclined surfaces 72a and 72b.

By arranging the upper effective side 61a of each coil 61 on the upper inclined surface 72a of the fixed side holder 31, the coil 61 faces the small magnet 62A of the upper inclined surface 22a of the movable side holder 21. By arranging the lower effective side 61b on the lower inclined surface 72b of the fixed side holder 31, the lower effective side 61b faces the small magnet 62B of the lower inclined surface 22b of the movable side holder 21. The surfaces of the two small magnets 62A and 62B of the upper inclined surface 22a and the lower inclined surface 22b are magnetized to different magnetic poles. Therefore, the two small magnets 62A and 62B magnetized on these different magnetic poles face each effective side 61a and 61b of the coil 61 in the bent state, respectively. It is preferable that the upper effective side 61a and the lower effective side 61b of the coil 61 in the bent state are set to have substantially the same distance from the swing fulcrum P. Further, the facing distance between the small magnets 62A and 62B and the effective sides 61a and 61b of the coil 61 is set to the same dimensions on the upper side and the lower side.

That is, in the third embodiment, the swing drive mechanism 60 has a magnet that is a combination of two small magnets 62A and 62B having different magnetic poles, and the effective sides 61a and 62b facing the small magnets 62A and 62B, respectively. It is composed of a coil 61 in a bent state.
The combination of these small magnets 62A and 62B and the coil 61 is such that one side of the movable side holder 21 in the X-axis direction + X, the other side in the X-axis direction −X, one side in the Y-axis direction + Y, and the Y-axis direction. It is arranged on the inclined surface of −Y on the other side of the above.

In the antenna device 102 of the third embodiment, the coil 61 is formed in a bent shape along the swing direction, and the small magnets 62A and 62B also change the direction of inclination so as to follow the bent state of the coil 61. Small magnets 62A and 62B with different magnetic poles face each other on the upper and lower effective sides 61a and 61b of the bent coil 61. Since these facing portions are arranged at substantially the same distance from the swing fulcrum P, the facing distance between the small magnets 62A and 62B and the coil 61 is unlikely to change depending on the swing position, and a constant driving force is generated. be able to. Further, the dimension in the direction orthogonal to the Z-axis direction (X-axis direction and Y-axis direction) can be reduced by the amount of bending, which is advantageous for miniaturization of the antenna device 102.
A weight 29 as a center of gravity position adjusting member is provided at the upper end of the support column 27 of the movable side holder 21. In the case of the third embodiment, eight magnets 62A and 62B are fixed to the movable side holder 21 at mutual intervals, and the weight of the movable side holder 21 as a whole is heavier. Therefore, the antenna is larger than the gimbal member 40. A weight 29 is provided on the 10 side to adjust the center of gravity.

<Fourth Embodiment>
11 and 12 show the fourth embodiment.
In the antenna device 103 of the fourth embodiment, as the movable body 20, the movable side holder 21 has a shape similar to that of the first embodiment, and the movable side holder 21 constituting the quadrangular pyramid has a shape on each inclined surface 22. The coils 61 of the swing drive mechanism 60 are fixed one by one. The movable side holder 21 is fixed to the back surface of the antenna 10. Further, the movable side holder 21 secures a large inclined surface 22 as compared with the antenna device 101 of the second embodiment, and is formed in a dome shape so as to project toward the −Z side in the Z-axis direction as a whole. The weight is reduced by forming the concave portion 24 having a hollow inside. A relatively large coil 61 is fixed to the large-area inclined surface 22.

On the other hand, as the fixed body 30, the central portion of the fixed side holder 31 in the shape of a cylindrical block is formed in a concave shape on the + Z side of the Z axis, and the apex is formed on the concave surface on the −Z side in the Z axis direction. Four inclined surfaces 72 are formed in an arrangement having a quadrangular pyramid shape. One magnet 62 of the swing drive mechanism 60 is fixed to each of these inclined surfaces 72. In this case, the inclined surface 72 of the fixed side holder 31 is also formed in a relatively large area like the inclined surface 22 of the movable side holder 21, and a large magnet 62 is used. Further, a cylindrical wall 75 is integrally provided at the upper end of the fixed side holder 31 so as to project the peripheral edge portion upward. The tubular wall 75 is formed to have the same diameter as the diameter of the peripheral edge of the antenna 10.

The gimbal member (swing support mechanism) 40 has an outer ring portion 41, an intermediate ring portion 42, and an inner ring portion 43 arranged in triple concentric circles, and the outer ring portion 41 and the intermediate ring portion 42 are X. The intermediate ring portion 42 and the inner ring portion 43 are connected to each other by the two connecting portions 44 along the Y-axis direction, and the intermediate ring portion 42 and the inner ring portion 43 are connected to each other by the two connecting portions 45 along the Y-axis direction. The outer ring portion 41 of the gimbal member 40 is fixed to the upper end portion of the cylindrical wall 75 of the fixed side holder 31, and the inner ring portion 43 is fixed to the outer peripheral surface of the movable side holder 21.
In the fourth embodiment, the cover 300 made of a bellows-shaped cylinder is provided between the tubular wall 75 of the fixed-side holder 31 and the antenna 10.

The antenna device 103 of the fourth embodiment is lighter than the antenna device 101 of the second embodiment, and the coil 61 provided in the movable side holder 21 is made larger by that amount. The weight is balanced by the antenna 10 and the coil 61. Therefore, the center of gravity position adjusting member (weight) 28 used in the second embodiment is abolished. Then, a larger driving force can be exerted by the large coil 61 and the magnet 62.

<Fifth Embodiment>
13 and 14 show the fifth embodiment.
In the antenna device 104 of the fifth embodiment, the coil 61 is fixed to the back surface of the umbrella-shaped antenna 10 at an inclination approximately equal to that of the umbrella-shaped antenna 10, and the coil 61 is fixed to the back surface of the antenna 10 from a direction orthogonal to the central axis C of the antenna 10. When viewed, a part of the swing drive mechanism 60 is arranged in the inner space of the umbrella-shaped antenna 10. Further, the movable body 20 includes a movable side holder 21 for holding the coil 61 and a shaft 80.
Specifically, a movable side holder 21 for holding the coil 61 is integrally fixed to the back surface of the antenna 10. The movable side holder 21 is formed in a concave shape from the −Z side in the Z-axis direction, similar to the shape of the back surface of the umbrella-shaped antenna 10, and is centered on the concave surface on the + Z side in the Z-axis direction. Four inclined surfaces 22 are formed in a quadrangular pyramid-like arrangement with one point on the axis C (Z axis) as the apex. Then, one coil 61 of the swing drive mechanism 60 is fixed to each of the inclined surfaces 22. As a result, the coil 61 is held on the back surface of the antenna 10 via the movable side holder 21, and each coil 61 is located on one side in the X-axis direction + X, on the other side in the X-axis direction −X, and in the Y-axis direction. It is arranged on one side + Y and the other side −Y in the Y-axis direction. A through hole 25 is provided on the central axis C at the center of the movable side holder 21.
A shaft 80 is provided on the central axis C through the through hole 25. In the shaft 80, the upper end portion 81a of the shaft portion 81 is formed in a hemispherical shape. Further, the spherical seat 82 is fixed to the back side of the apex portion 11 of the antenna 10, and the upper end portion 81a of the shaft portion 81 is in contact with the spherical seat 82.

On the other hand, the fixed body 30 includes a circular base 33 and a block body 90 fixed on the base 33 on the fixed side holder 31, and the upper surface of the block body 90 (+ Z side in the Z-axis direction). On the surface), four inclined surfaces 72 are formed in a quadrangular pyramid-like arrangement having one point on the central axis C (Z axis) as an apex. These inclined surfaces 72 are arranged to be inclined so as to gradually approach the central axis C toward the upper side (+ Z side in the Z axis direction). Further, these inclined surfaces 72 are arranged in parallel with the inclined surface 22 of the movable side holder 21. Then, one magnet 62 is fixed to each inclined surface 72.
Further, a recess 33c is formed on the upper surface of the base 33 leaving the peripheral edge portion 33b, and a recess 92 is formed on the lower surface of the block body 90 leaving the peripheral edge portion 91. , Fixed and integrated so as to be stacked at the peripheral portions 33b, 91. Further, in the central portion of the fixed side holder 31, a hole portion 34c is provided on the central shaft C in a penetrating state.

The gimbal member (swing support mechanism) 40 is formed in a triple ring shape of an outer ring portion 41, an intermediate ring portion 42, and an inner ring portion 43, and the ring portions 41 to 43 are connected in the X-axis direction by the connecting portions 44 and 45. Or they are connected in the Y-axis direction. Then, the outer ring portion 41 is fixed in a state of being sandwiched between the peripheral portions 33b and 91 of the base 33 and the block body 90, and the inner side of the gimbal member 40 excluding the outer ring portion 41 in these recesses 33c and 92. The parts are placed in a stretched state.
Then, inside the inner ring portion 43 of the gimbal member 40, a disk portion 83 integrated with the lower end portion of the shaft portion 81 of the shaft 80 is fixed. Therefore, the disc portion 83 of the shaft 80 is fixed to the gimbal member 40, and the shaft portion 81 passes through the hole portion 34c and the through hole 25 of the fixed side holder 31 and the movable side holder 21 and is a spherical surface on the back side of the antenna 10. It has reached the seat 82.

In the antenna device 104 of the fifth embodiment configured in this way, the swing fulcrum P is the intersection of the swing axes S1 and S2 of the gimbal member 40, and is arranged at the lower part of the entire antenna device 10. Since the movable side holder 21 and the coil 61 are fixed close to the back surface of the antenna 10, the center of gravity of the movable body 20 is provided near the center of gravity G of the antenna 10.
In each of the antenna devices 102 to 104 of the second to fifth embodiments described above, the convex portion 23 provided on the movable side holder 21 of the first embodiment is omitted, but the positioning of the coil 61 and the magnet 62, In order to prevent collision with 62A and 62B, the movable side holder 21 may be provided with the convex portion 23 as in the first embodiment (see FIGS. 1 and 2).

(Other variants)
In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, although a bellows-shaped cylinder is provided as the cover 300, it is not necessarily a bellows-shaped one as long as it can follow the swing of the antenna 10, but it may be a sheet-shaped one that can be expanded and contracted. It may have a structure that covers between the antenna 10 and the fixed body 30.
Further, the entire antenna device may be covered with a box-shaped cover made of synthetic resin or the like. For example, taking the antenna device 102 of the second embodiment as an example, the cover 300 made of a bellows-shaped cylinder is abolished, and the entire area up to the upper part of the antenna 10 is placed on the base 33 as shown in the antenna device 105 shown in FIG. A box-shaped cover 301 may be provided to cover the above. The cover 301 is made of a material that allows radio waves to pass through.

In each embodiment, the antenna 10 is arranged at the upper part and installed so that the central axis C faces in the vertical direction, but it may be installed so that the central axis C faces in the horizontal direction. Even in that case, if the swing fulcrum P and the center of gravity of the movable body 20 are aligned with each other by a center of gravity position adjusting member such as a weight in balance with the weight of the antenna 10, the bending of the gimbal member 40 or the like can be suppressed. , The rocking operation can be performed with high accuracy.

Further, the facing direction between the coil 61 and the magnet 62 forming the set is provided in the direction intersecting the central axis C, but in the present invention, the facing direction between the coil 61 and the magnet 62 is provided in the direction along the central axis C. Including cases.
Further, in each of the first, second, fourth, and fifth embodiments, different magnetic poles 62a and 62b are arranged at both ends of the magnet 62 so as to be arranged in the swing direction via the magnetizing polarization line 62c on the surface of the magnet 62. At the same time, the effective sides 61a and 61b facing the magnetic poles 62a and 62b are arranged on the coil 61, and in the third embodiment, the magnets made of a combination of the small magnets 62A and 62B having different magnetic poles are smaller than the magnets. The effective sides 61a and 61b of one coil 61 are arranged so as to face each of the magnets 62A and 62B, but two small magnets 62A and 62B having different magnetic poles are used as in the antenna device 106 shown in FIG. Two small coils arranged at both ends so as to line up in the swing direction and opposed to the small magnets 62A and 62B with respect to the magnets composed of the small magnets 62A and 62B having different magnetic poles. It may be combined with a coil composed of 61A and 61B. In this case, as the swing drive mechanism 60, a set of magnets and coils is configured by two small magnets 62A and 62B and two small coils 61A and 61B, and when the movable body 20 is swung, A magnetic field is generated in each of the small coils 61A and 61B in a direction based on the right-handed screw rule so that the magnetic field acts in a different direction (attractive force or repulsive force) with the small magnets 62A and 62B having different magnetic poles. do it.

10 ... Antenna, 100 to 106 ... Antenna device, 11 ... Top, 12 ... Reflective surface, 13 ... Flange, 20 ... Movable body, 21 ... Movable side holder, 22,34b ... Inclined surface, 22a ... Upper inclined surface, 22b ... lower inclined surface, 23 ... convex portion, 24, 33c ... concave portion, 25 ... through hole, 27 ... strut portion, 27a, 34c ... hole portion, 28, 29 ... weight (center of gravity position adjusting member), 30 ... fixed body , 31 ... Fixed side holder, 32 ... Shaft, 33 ... Base, 33a ... Empty space, 33b ... Peripheral part, 34 ... Block body, 34a ... Disk part, 35 ... Mounting plate, 36 ... Shaft part, 37 ... Fixed part , 38 ... Mounting part, 40 ... Gimbal member (swing support mechanism), 41 ... Outer ring part, 42 ... Intermediate ring part, 43 ... Inner ring part, 44, 45 ... Connecting part, 50 ... Attitude detection sensor, 60 ... Swing drive mechanism, 61 ... coil, 61A, 61B ... small coil, 61a, 61b ... effective side, 62 ... magnet, 62A, 62B ... small magnet, 62a, 62b ... magnetic pole, 62c ... magnetizing polarization line, 63 ... yoke , 71 ... block, 72a ... upper inclined surface, 72b ... lower inclined surface, 73 ... frame-shaped portion, 75 ... tubular wall, 80 ... shaft, 81 ... shaft portion, 81a ... upper end portion, 82 ... spherical seat, 83. ... Disk part, 90 ... Block body, 91 ... Peripheral part, 92 ... Recessed part, 300 ... Cover (bellows-shaped cylinder), 301 ... Cover, C ... Central axis, F ... Focus, G ... Center of gravity, P ... Swing Supporting points, S1, S2 ... Swinging shaft.

Claims (12)

A movable body having an antenna, a fixed body, a swing support mechanism that swingably supports the movable body around a swing fulcrum on the central axis of the antenna, and a posture due to the inclination of the central axis of the antenna. It is provided with a posture detection sensor that detects a change in the posture and a swing drive mechanism that swings the movable body based on the detection result of the posture detection sensor, and the swing drive mechanism is either the movable body or the fixed body. It has a magnet provided on one side and a coil provided on either the movable body or the fixed body and facing the magnet and exerting a driving force between the magnet and facing the magnet. The magnet and the coil that form a pair in the state face each other in at least one direction along the central axis of the antenna or in a direction intersecting the central axis .
The movable body has a holder fixed to the antenna, and a plurality of inclined surfaces are formed on the holder in a pyramidal arrangement having one point on the central axis as an apex, and the inclined surface has a plurality of inclined surfaces. , An antenna device with a vibration compensating function, characterized in that one of the coil and the magnet is fixed. The swing according to claim 1, wherein the swing drive mechanism is arranged around the central axis in a state in which the facing direction of the magnet and the coil is inclined with respect to the central axis. Antenna device with correction function. The antenna has a reflective surface having a concave curved surface from the center to the outside in the radial direction on the upper surface of the umbrella shape, and the antenna is viewed from a direction in which the swing fulcrum is orthogonal to the central axis. The antenna device with a shake correction function according to claim 1 or 2, wherein the antenna device is arranged so as to overlap the inside of the antenna device. The swing support mechanism is composed of a gimbal member that can swing around two swing axes that are orthogonal to the central axis and that are orthogonal to each other when viewed from one end of the central axis. The antenna device with a shake correction function according to any one of claims 1 to 3, wherein the intersection of both swing axes of the gimbal member is the swing fulcrum. According to claim 1, the magnet and the coil forming the set are provided at least one set in two directions orthogonal to each other on the central axis when viewed from one end side of the central axis. The antenna device with a shake correction function according to any one of 4. The shaking correction function according to claim 5, wherein the magnet and the coil forming the set are provided in an arrangement facing each other with the central axis interposed therebetween, two sets in each of the two directions. Antenna device. The antenna device with a shake correction function according to any one of claims 1 to 6, wherein the holder is provided with a weight adjusting member that balances the weight of the antenna via the swing center. The antenna device with a shake correction function according to any one of claims 1 to 7 , wherein the magnet is provided on the fixed body and the coil is provided on the movable body. Different magnetic poles are formed at both ends of the magnet in the swing direction, and the coil is characterized in that the effective side facing each magnetic pole of the magnet is formed orthogonal to the swing direction. The antenna device with a shake correction function according to any one of claims 1 to 8. The distance between the different magnetic poles of the magnet and the swing fulcrum is set to be substantially the same, and the coil is bent so as to have the opposite distance between the different magnetic poles and the effective side substantially the same. 9. The antenna device with a shake correction function according to claim 9. The magnet has a plurality of small magnets arranged so as to have different magnetic poles at both ends in the swing direction, and the coil has a plurality of small coils each facing the small magnets of each magnetic pole. The antenna device with a shake correction function according to any one of claims 1 to 8, wherein the antenna device has a vibration correction function. The first aspect of the present invention is characterized in that a stretchable and deformable cover is provided between the antenna and the fixed body so as to close the space between the antenna and the fixed body to surround the swing support mechanism and the swing drive mechanism. 11. The antenna device with a shake correction function according to any one of the above items.

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