JPH10256820A - Antenna system and jack used for the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna system where an antenna angle is changed even when a motor is out of order and to provide a jack used for the antenna system. SOLUTION: The jack is provided with a 1st drive section 4 that is provided for a 1st case 3 and drives a 1st make screw section 6b, a 1st engagement section 13a that engages with the 1st male screw section 6b to produce a thrust force, a 2nd drive section 9 that is provided for a 2nd case 8 and drives a 2nd make screw section 11b, a 2nd engagement section 13b that engages with the 2nd make screw section 11b to produce the thrust force, a cylinder 13 that has the 1st engagement section 13a and the 2nd engagement section 13b at its both ends to receive the thrust force, and a lock section 14 that prevents the cylinder section 13 from being turned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device, and more particularly, to an antenna device capable of changing a directional angle of a parabolic antenna and a jack device used for the device.

[0002]

2. Description of the Related Art FIG. 6 is an overall view showing, for example, a conventional antenna device. FIG. 7 is an explanatory diagram showing the jack device shown in FIG. 6, and FIG. 8 is an explanatory diagram showing another example of the jack device shown in FIG. In FIG. 6, reference numeral 30 denotes an antenna unit;
0a is a dish-shaped antenna provided in the antenna section 30, 3
0b is a connecting portion provided on the back surface of the antenna 30a;
c is a column supporting the connection unit 30. Reference numeral 31 denotes a base, which is a support portion for supporting the antenna portion 30, and rotatably supports the support portion 30c. Reference numeral 32 denotes a base provided on the base 30, and reference numeral 33 denotes a jack device, one end of which is connected to the connection part 30b and the other end of which is connected to the base 32. Reference numeral 34 denotes an antenna device, and reference numerals 30 to 3
3 is included.

In FIG. 7, reference numeral 35 denotes a case provided on the jack device 33, and reference numeral 35a denotes a connection provided on the case 35, which is connected to the base 32 (shown in FIG. 6). Reference numeral 36 denotes a forward / reverse rotatable motor provided on the case portion 35, and 37 denotes a gear portion provided on the motor 36, which is constituted by a plurality of gears (not shown) and increases the rotational force of the motor 36. And transmitted to the drive transmission unit 38 from the gear 37a. Reference numeral 38 denotes a drive transmission unit, which meshes with the gear 37a and rotates with the rotation of the gear 37a. 38a is a male screw part provided in the drive transmission part 38, 39 is a bearing part provided in the case part 35, and supports the drive transmission part 38 rotatably. Reference numeral 40 denotes a cylindrical body, which has a female screw portion 40a at one end engaging with the male screw portion 38a via the ball portion 41, and a connecting portion 40b at the other end connected to the connecting portion 30b (shown in FIG. 6). I have. 41 is a ball part, and a male screw part 38a
And the female screw portion 40a, and acts so that thrust is generated smoothly. Reference numeral 42 denotes a bellows portion which expands and contracts with the movement of the cylindrical portion. One end and the other end are fixed to the case portion 35 and the cylindrical portion 40, respectively.

In FIG. 8, the same reference numerals as those in FIG. 7 denote the same or corresponding parts, and a description thereof will be omitted. 43 is a jack device,
44 is a case part provided in the jack device 43, 44a
Denotes a connecting portion provided on the case portion 44, and the base portion 32
(Shown in FIG. 6). Reference numeral 45 denotes a drive transmission unit, which meshes with the gear 37a and rotates with the rotation of the gear 37a. Reference numeral 45a denotes a female screw portion provided on the drive transmitting portion 45, and 46 denotes a bearing portion provided on the case portion 44, which rotatably supports the drive transmitting portion 45. 47 is a rod, 4
Reference numeral 7a denotes a male screw portion provided on the rod-shaped body 47, which is screwed with the female screw portion 45a via a ball portion. Reference numeral 47b denotes a connecting portion provided on the rod-shaped body 47, which is connected to the connecting portion 30b (shown in FIG. 6). Reference numeral 48 denotes a ball portion which is screwed into the female screw portion 45a and the male screw portion 47a so that a thrust is generated smoothly. Reference numeral 49 denotes a bellows portion that expands and contracts with the movement of the rod-shaped portion 47. One end of the bellows portion is connected to the case portion 44, and the other end is connected to the connection portion 47b.

Next, the operation will be described with reference to the drawings. The jack device 33 holds the antenna 30a at a predetermined angle by maintaining a predetermined interval between the connecting portion 30b and the base portion 32. When the operator changes the angle of the antenna 30a using an operation unit (not shown), the motor 36 rotates, and the rotational force of the motor 36 is increased by the gear unit 37 and output by the gear 37a. The corresponding drive transmission unit 38 rotates. Due to the rotation of the drive transmitting portion 38, a thrust is generated in the female screw portion 40a screwed with the male screw portion 38a via the ball portion 41, and the cylindrical body portion 40 receiving the thrust moves straight on the male screw portion 38a. This allows
The distance between the base 32 and the connection 30b changes. Therefore, the angle of the antenna 30a of the antenna unit 30 supported by the base 31 so as to be rotatable from the support 30c is changed. The operation of the jack device 43 (shown in FIG. 8) is also substantially the same as the operation of the above-described jack device 34, and will not be described.

[0006]

A conventional antenna device 3
4 is configured as described above, there is a problem that the antenna angle cannot be changed when the motor 36 fails. The screw positions of the male screw portion 38a and the female screw portion 40a have a one-to-one relationship with the angle of the antenna 30a. Therefore, when the angle of the antenna 30a is frequently changed within a certain range, the male screw portion 38a and the female screw portion 40a (the female screw portion 45a and the male screw portion 47a when the jack device 43 is used) of the portion corresponding to the range are used. It will be worn locally. When the wear is remarkable, there is a problem that the jack device 34 (jack device 43) cannot operate smoothly or the operation itself cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an antenna device capable of changing an antenna angle even if a motor of the jack device fails, and a jack device used for the device. It is another object of the present invention to provide a jack device for an antenna device, which can eliminate a problem caused by wear of a male screw portion and a female screw portion.

[0008]

An antenna device according to the present invention includes an antenna provided rotatably with respect to a support, a connecting portion provided on a back portion of the antenna, and an antenna provided on the support. And a jack device having one end connected to the connection portion and the other end connected to the base portion, wherein the jack device has a distance between the one end and the other end. Are provided with a plurality of driving means for expanding and contracting.

Further, a jack device for an antenna device according to the present invention has a first case rotatably supporting a first male screw portion, and is provided in the first case to rotate the first male screw portion. A first drive portion, a first engagement portion that engages with the first male screw portion to generate a thrust, a second case that rotatably supports the second male screw portion, and a second case. A second drive unit provided in the case for rotating the second male screw portion, a second engagement portion that engages with the second male screw portion to generate a thrust, and the first engagement portion A cylindrical portion provided with the second engaging portion at both ends and receiving the thrust; a projecting portion provided on the cylindrical portion protruding laterally from a side surface of the cylindrical portion; And a detent part provided on one of the case and the second case and protruding to the other side and abutting on the protrusion. A.

Also, in the jack device for an antenna device according to the present invention, the cylindrical body portion is provided with a protruding portion projecting laterally from the side surface, and the rotation preventing portion is provided on one of the first case and the second case. It is provided and protrudes to the other side to abut on the protrusion.

Further, a jack device for an antenna device according to the present invention has a first case rotatably supporting a first female screw portion, and is provided in the first case to rotate the first female screw portion. A first driving portion, a first engagement portion that engages with the first female screw portion to generate a thrust, a second case that rotatably supports the second female screw portion, A second drive unit provided on the case for rotating the second female screw portion, a second engagement portion for generating a thrust by engaging with the second female screw portion, and the first engagement portion And a rod-shaped portion provided at both ends thereof for receiving the thrust;
A protrusion provided on the rod-shaped portion, which protrudes laterally from a side surface of the rod-shaped portion between the engagement portion and the second engagement portion;
A detent part is provided on one of the first case and the second case, and protrudes to the other side and comes into contact with the protrusion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. An embodiment of the antenna device of the present invention and a jack device used for the device will be described.
FIG. 1 is an overall view showing the antenna device according to the first embodiment. 1, the same reference numerals as those in FIGS. 6 to 8 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 1 denotes a jack device, one end of which is rotatably connected to the connection portion 30b, and the other end of which is rotatably connected to the base portion 32. Reference numeral 2 denotes an antenna device, which includes a jack device 1 and reference numerals 30 to 32.
Includes the configuration with.

FIG. 2 is a detailed explanatory view of the jack device 1 shown in FIG. 2, the same reference numerals as those in FIG. 1 or FIG. 7 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 3 denotes a first case portion provided on the jack device 1, and 3a denotes a connection portion provided on the first case portion 3, which is connected to a base portion 32 (shown in FIG. 1). Reference numeral 4 denotes a first motor provided on the first case portion 3 and capable of rotating forward and backward. Reference numeral 5 denotes a first gear portion provided on the first motor 4, and a plurality of gears (not shown).
The torque is increased from the first motor 4 and transmitted from the gear 5a. Reference numeral 6 denotes a first drive transmission unit provided with a gear portion 6a and a first male screw portion 6b. The gear portion 6a is engaged with the gear 5a and rotates with the rotation of the gear 5a. Reference numeral 7 denotes a first bearing portion provided on the first case portion 3, which rotatably supports the first drive transmission portion 6.
Reference numeral 8 denotes a second case portion provided on the jack device 1,
Reference numeral 8a denotes a connection portion provided on the second case portion 8, which is connected to the connection portion 30b (shown in FIG. 1). Reference numeral 9 denotes a second motor provided on the second case portion 8 and capable of rotating forward and reverse.
0 is a second gear portion provided on the second motor 9,
It is constituted by a plurality of gears (not shown), and increases the rotational force of the second motor 9 and transmits it from the gear 10a. 11
Is a second drive transmission portion provided with a gear portion 11a and a second male screw portion 11b. The gear portion 11a is engaged with the gear 10a and rotates with the rotation of the gear 10a. Reference numeral 12 denotes a second bearing portion provided on the second case portion 8, which rotatably supports the second drive transmission portion 11.

Reference numeral 13 denotes a cylindrical body, and reference numeral 13a denotes a first female screw provided at one end of the cylindrical body 13, which is screwed with the first male screw 6b. 13b is a second female screw portion provided at the other end of the cylindrical body portion 13;
Screw with b. 13c is a protrusion provided in the lateral direction from one side surface of the cylindrical body portion 13, 13c1 is a hole provided through the protrusion 13c along the expansion and contraction direction of the jack device 1, and 13d is a cylinder. 13d1 is a protrusion provided to protrude in the lateral direction from the side surface on the other end side of the body portion 13, and the jack device 1
The hole is provided to penetrate the protrusion 13d along the direction of expansion and contraction of. Reference numeral 14 denotes a rotation-stop portion fixedly provided on the first case portion 3.
Projecting into the mold, the tip of which is inserted into the hole 13c1 to
Of the male screw portion 6b. Reference numeral 15 denotes a rotation preventing portion fixedly provided on the second case portion 8,
Project from the side wall of the case portion 8 into an L-shape, and the distal end portion thereof is inserted into the hole portion 13d1 to project to about the distal end of the second male screw portion 11b. Reference numerals 16 and 17 denote bellows, and bellows 16
One end and the other end are fixed to the first case part 3 and the cylindrical body part 13, respectively, and the bellows part 17 is fixed to the second case part 8 and the cylindrical body part 13 respectively at one end and the other end.

Note that the jack device 1 according to the first embodiment includes the outputs of the first and second motors 4 and 9 and the first and second motors.
Gear ratios of the gear portions 5, 10 and the pitches of the first and second male screw portions 6b, 11b and the first and second female screw portions 7a, 7
The same is set for the pitch b and the like. Therefore, the thrust of the cylindrical body 13 by the first motor 4 and the second motor 9 becomes the same.

Next, the operation will be described with reference to the drawings. First, the antenna angle changing operation will be described. The jack device 1 maintains the angle of the antenna 30a at a predetermined angle by holding the connection portion 30b and the base portion 32 at a predetermined interval. When the angle of the antenna 30a is changed by an operation unit (not shown), the first motor 4 rotates. The rotational force of the first motor 4 is increased by the first gear unit 5 and transmitted from the gear 5a to the first drive transmission unit 6, and the first male screw unit provided on the first drive transmission unit 6 6b rotates. Thrust is generated in the cylindrical body 13 via the first female screw 13a screwed with the first male screw 6b. Detent part 1 in hole 13c1
4 is inserted, the cylindrical body 13 becomes the first male screw 6
It does not rotate with the rotation of b. Therefore, the first
Of the thrust generated in the first female screw portion 13a screwed with the male screw portion 6b, only the component that causes the cylindrical body portion 13 to go straight is effective. Accordingly, the cylindrical portion 13 moves straight on the first male screw portion 6b by the straight component of the thrust. On the other hand, the second female screw portion 13b provided at the other end of the cylindrical body portion 13 is screwed with the second male screw portion 11b, and the second drive transmission portion provided with the second male screw portion 11b. 11 and the second case section 8 supporting the second drive transmission section 11 move with the movement of the cylindrical body section 13 so that the jack device 1 expands and contracts. Thereby, the interval between the base portion 32 and the connection portion 30b changes. Therefore, the angle of the antenna 30a rotatably supported on the base 31 via the support 30c is changed.

In the above description of the operation, the first motor 4
Has been described to change the angle of the antenna 30a, but the second motor 9 is rotated to change the angle of the antenna 30a.
May be changed. In addition, even when the second motor 9 is rotated, since the rotation preventing portion 15 is inserted into the hole 13d1 of the projection 13d, the cylindrical portion 13 has the second male screw 1
It is restricted from rotating with the rotation of 1b. Therefore, similarly to the case where the first motor 4 is rotated, the second female screw portion 13b screwed with the second male screw portion is provided.
The effective component of the propulsion generated in the above is the propulsion that moves straight through the cylindrical body 13. However, the first female screw portion 13a on one side of the cylindrical body portion 13 is screwed with the first male screw portion 6b, and the first drive transmission portion 6 provided with the first male screw portion 6b.
Are supported by the first case portion 3 connected to the base portion 31. Therefore, the first drive portion 6 and the cylindrical portion 13 do not move because the first case portion 3 cannot move. Therefore, the cylindrical body 13 reacts the propulsive force to move the second case section 8 to expand and contract the jack device 1. In this point, the case where the second motor 9 is rotated is different from the case where the first motor 4 is rotated. In addition,
Switching between the first and second motors 4 and 9 to be driven may be performed, for example, by selecting a desired motor from an operation unit (not shown). Further, when an abnormality occurs in one motor, the other motor may be automatically selected.

The angle of the antenna 30a can be changed at double speed by simultaneously driving the first motor 4 and the second motor 9 to expand and contract the jack device 2 in the same direction.

In the jack device 1, the cylindrical portion 13
Protrusions 13c, 13d and detent portions 14, 15 to prevent rotation of
Was used, but the present invention is not limited to this.
May be provided with a key or a key groove in the cylindrical portion, and the first and second case portions 3 and 8 may be provided with a key groove or a key that engages with the key. When either one of the detent portions 14 and 15 is protruded to the other case portion side, only one of the detent portions 14 and 15 may be used.

Next, the screw position between the first male screw portion 6b and the first female screw portion 13a, the second male screw portion 11b and the second
The method of adjusting the screwing position with the female screw portion 13b will be described. First, the first motor 4 is rotated to advance (or retreat) the cylindrical body 13 at a predetermined distance. Next, the second motor 9
Is rotated to the same distance as the predetermined distance.
Is retracted (or advanced). Thereby, the antenna 30
a, the screwing position between the first male screw portion 6b and the first female screw portion 13a, the second male screw portion 11b and the second
Can be changed with the female screw portion 13b. That is, in the antenna device 2 and the jack device 1 according to the first embodiment, the engagement position between the first male screw portion 6b and the first female screw portion 13a and the second
The engagement position between the male screw portion 11b and the second female screw portion 13b can be arbitrarily changed, and the first and second male screw portions 6b and 11b and the first and second female screw portions 13a can be changed with respect to the antenna angle. , 13b are not in a one-to-one relationship. Therefore, by adjusting the engagement positions, the first,
2nd male screw part 6b, 11b, 1st, 2nd female screw part 1
Local wear of 3a and 13b can be prevented.

In order to drive the jack device 1 according to the first embodiment more smoothly, the first male screw portion 6b
And the first female screw portion 13a, and further, the male screw portion 11b and the second
May be engaged with each other with a ball interposed in the screwing with the female screw portion 13b. FIG. 3 is an explanatory diagram showing a first other form of the jack device shown in FIG. In FIG.
2 denote the same or corresponding parts, and a description thereof will be omitted. Reference numerals 18 and 19 are ball portions, and the ball portion 18 is a first ball portion.
The ball portion 19 is provided between the male screw portion 6c and the first female screw portion 13e so as to engage with each other.
c and the second female screw portion 13f, which are engaged with each other to act so that thrust is smoothly generated. Reference numeral 20 denotes a jack device, which includes configurations denoted by reference numerals 18 and 19 and configurations denoted by reference numerals 3 to 15. This jack device 2
0 indicates that the first male screw portion 6c and the first female screw portion 13e are engaged via the ball portion 18, and the second male screw portion 11c and the second female screw portion 13f are engaged via the ball portion 19. In this respect, the only difference from the above-described jack device 1 (shown in FIG. 2) is that the other configurations and operations are the same as those of the jack device 1, so that the description of the other configurations and operations is omitted. The jack device 20 is connected to the first
Since the male screw 6c and the first female screw 13e are engaged with each other and the second male screw 11c and the second female screw 13f are engaged via the ball portion 19, the smoother and more accurate are achieved. The jack device 18 can be expanded and contracted. Therefore, the angle of the antenna 30a can be changed more accurately.

It should be noted that, similarly to the conventional jack device 43, a rod-shaped member may be used instead of the cylindrical portion 13. FIG. 4 is an explanatory view showing a second other embodiment of the jack device shown in FIG. 4, the same reference numerals as those in FIG. 2 denote the same or corresponding parts, and a description thereof will be omitted. 21 is a jack device,
Like the jack device 1 (shown in FIG. 2), the first case portion 3 is rotatably connected to the base portion 32 (shown in FIG. 2),
The second case portion 8 is rotatably connected to the connection portion 30b (shown in FIG. 2). Also, reference numeral 22 denotes the gear portion 22a and the first
Is a first drive transmission portion provided with the female screw portion 22b, and the gear portion 22a rotates with the rotation of the gear portion 5a by engaging with the gear 5a. Reference numeral 7a denotes a first bearing portion provided on the first case portion 3, which rotatably supports the first drive transmission portion 22. Reference numeral 23 denotes a second drive transmission unit provided with a gear portion 23a and a second female screw portion 23b.
3a is engaged with the gear 10a and rotates with the rotation of the gear 10a. Reference numeral 12a denotes a second bearing portion provided on the second case portion 8, which rotatably supports the second drive transmission portion 23.

Reference numeral 24 denotes a rod portion, and reference numeral 24a denotes a first male screw portion provided at one end of the rod portion 24, which is screwed with the first female screw portion 22b. Reference numeral 24b denotes a second male screw portion provided at the other end of the rod portion 24, and the second female screw portion 2
3b. Reference numeral 24c denotes a protrusion provided in a lateral direction from a side surface of a substantially central portion of the rod portion 24, and reference numeral 24c1 denotes a hole provided in the protrusion 24c.
A through hole is formed in the protruding portion 24c along the direction of expansion and contraction. Reference numeral 24d denotes a protrusion provided in a lateral direction from a side surface of a substantially central portion of the rod portion 24, and 24d1 denotes a hole provided in the protrusion 24d. A through hole is formed. Reference numeral 25 denotes a rotation preventing portion fixedly provided on the first case portion 3, which protrudes from the side wall of the first case portion 3 in an L-shape, and has a tip portion inserted into the hole portion 24c1. Reference numeral 26 denotes a rotation preventing portion fixedly provided on the second case portion 8, protrudes from the side wall of the second case portion 8 into an L-shape, and has a tip portion formed by the hole 2.
4d1. Reference numerals 27 and 28 denote bellows. The bellows 27 is fixed at one end and the other end to the first case portion 3 and the rod-shaped portion 24, respectively. The bellows portion 28 has one end and the other end respectively to the second case portion. 8 and the rod portion 24. Note that the jack device 21 has the above-mentioned reference numerals 7a, 12a, and 22.
It includes the configurations denoted by reference numerals 28 to 28 and the configurations denoted by reference numerals 3 to 5 and 8 to 10.

In this jack device 21, the outputs of the first and second motors 4, 9 and the gear ratios of the first and second gear portions 5, 10 and the first and second female screw portions 22b,
The pitch of 23b and the pitch of the first and second external threads 24a and 24b provided on the rod portion 24 are set to be the same. Therefore, the driving force of the rod portion 24 by the first motor 4 and the second motor 9 is the same.

Next, the operation will be described with reference to the drawings. The jack device 21 holds the connecting portion 30b (shown in FIG. 1) and the base portion 32 (shown in FIG. 1) at a predetermined interval to hold the antenna 30a.
The angle (shown in FIG. 1) is kept at a predetermined angle. When the angle of the antenna 30a is changed by an operation unit (not shown), the first motor 4 rotates. This first motor 4
Is increased by the first gear portion 5 and is transmitted from the gear 5a to the first drive transmission portion 22 via the gear portion 22a to rotate the first female screw portion 22b. Thrust is generated in the rod portion 24 via the first male screw portion 24a screwed with the first female screw portion 22b. Non-rotating part 25 in hole 24c1
Is inserted, the rod-shaped portion 24 becomes the first female screw portion 22.
It does not rotate with the rotation of b. Therefore, of the thrust generated in the first male screw portion 24a screwed with the first female screw portion 22b, only the component that causes the rod portion 24 to go straight is effective. Therefore, the rod portion 24 moves straight on the first female screw portion 22b by the straight component of the thrust. On the other hand, the second male screw portion 24b provided at the other end of the rod portion 24 is the second male screw portion 24b.
The second case portion 8 that supports the second drive transmitting portion 23 provided with the second female screw portion 23b via the bearing portion 12a is formed of the rod-shaped portion 2b.
The jack device 21 expands and contracts by moving with the movement of 4. Thereby, the interval between the base portion 32 and the connection portion 30b changes. Therefore, the angle of the antenna 30a rotatably supported on the base 31 via the support 30c is changed. When the second motor 9 is driven, the second case portion 8 moves and the jack device 21 expands and contracts similarly to the jack device 1 described above. Also, the first and second female screw portions 22b and 23b and the first and second male screw portions 24a and 24b
The method for adjusting the screwing position is the same as that described in the description of the operation of the jack device 1 described above, and a description thereof will be omitted.

The jack device 21 also uses a ball to screw the first female screw portion 22b and the first engaging portion 24a together with the second female screw portion 23b, similarly to the jack device 20 shown in FIG. The screw engagement with the second engagement portion 24b may be smooth. FIG. 5 is an explanatory view showing a third other embodiment of the jack device shown in FIG. 5, the same reference numerals as those in FIGS. 2 to 4 denote the same or corresponding parts, and a description thereof will be omitted. 18
a and 19a are ball portions, and the ball portion 18a is provided between the first female screw portion 22c and the first male screw portion 24e so as to engage with each other, and the ball portion 19a is connected to the second female screw portion 2c.
3c and the second male screw portion 24f are provided and engaged with each other to act so that thrust is smoothly generated. 29
Is a jack device, which includes configurations denoted by reference numerals 18aa and 19a and configurations denoted by reference numerals 3 to 5, 8 to 10, and 22 to 28. The jack device 29 engages the first female screw portion 22c and the first male screw portion 24e via the ball portion 18a, and connects the second female screw portion 23c and the second male screw portion 24f via the ball portion 19a. The engagement allows the jack device 29 to expand and contract more smoothly and more accurately. Therefore, the angle of the antenna 30a can be changed more accurately.

The jack device 1 according to the first embodiment,
According to the antenna device 2 using 20, 21, and 29, even if one of the first and second motors 4 and 9 fails, the angle of the antenna 30a can be changed using the other, so that a highly reliable antenna device can be used. 2 can be obtained. According to the antenna device 2 using the jack devices 20 and 29, since the ball portions 18, 19 or 18a, 19a are used, respectively.
The expansion and contraction of the jack devices 20 and 29 can be made smooth, and the antenna angle change of the antenna device 2 can be made smooth.

According to the antenna device 2 using the jack devices 1, 20, 21, and 29, the screwing position of each screw portion (the first male screw portion 6a) is formed with respect to one angle of the antenna 30a.
And the first female screw portion 13a, the screw position of the second male screw portion 11b and the second female screw portion 13b) can be formed, so that the wear of the screw portion can be dispersed.
Problems caused by local wear can be prevented.

According to the antenna device 2 using the jack devices 1, 20, 21, and 29, the first and second motors 4, 9 are simultaneously driven to expand and contract in the same direction, so that the antenna 30a The angle can be changed more quickly, and the tracking performance of the antenna device 2 with respect to the antenna angle can be improved.

[0030]

According to the antenna device of the present invention,
Since the jack device is provided with a plurality of driving means for expanding and contracting the distance between one end and the other end, even if one of the driving means fails, the other driving means can expand and contract to change the antenna angle.

Further, the jack device according to the present invention has a first
A first case rotatably supporting the male screw portion, a first driving portion provided in the first case for rotating the first male screw portion, and a thrust force engaged with the first male screw portion. And a second case rotatably supporting the second male screw portion, a second drive portion provided in the second case and rotating the second male screw portion. A second engaging portion that generates a thrust by engaging with the second male screw portion, a cylindrical portion that receives the thrust by providing the first engaging portion and the second engaging portion at both ends,
Since there is provided a rotation preventing portion provided on one of the first case and the second case to prevent rotation of the cylindrical body portion, one of the first driving portion and the second driving portion fails. Also, the expansion and contraction operation can be performed by the other drive unit.

Also, in the jack device according to the present invention, the cylindrical body portion is provided with a laterally protruding projection on the side surface, and the rotation preventing portion is provided on one of the first case and the second case and the other is provided on the other. Since it projects to the side and abuts on the projection, rotation of the cylindrical body can be prevented with a simple configuration.

Also, the jack device according to the present invention has a first
A first case rotatably supporting the female screw portion, a first driving portion provided in the first case for rotating the first female screw portion, and a thrust force engaged with the first female screw portion. A second engaging portion that rotatably supports the second female screw portion, and a second driving portion that is provided in the second case and rotates the second female screw portion. A second engaging portion that generates a thrust by engaging with the second female screw portion, a rod-shaped portion provided with the first engaging portion and the second engaging portion at both ends to receive a thrust,
A protrusion protruding laterally from a side surface of the rod portion between the first engagement portion and the second engagement portion and provided on the rod portion, and one of the first case and the second case. Since the rotation preventing portion is provided and comes into contact with the protruding portion, even if one of the first driving portion and the second driving portion fails, the other driving portion can expand and contract.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram showing an antenna device according to a first embodiment of the present invention.

FIG. 2 is a detailed explanatory view of the jack device shown in FIG.

FIG. 3 is an explanatory view showing a first other form of the jack device shown in FIG. 1;

FIG. 4 is an explanatory view showing a second other form of the jack device shown in FIG. 1;

FIG. 5 is an explanatory view showing a third other embodiment of the jack device shown in FIG. 1;

FIG. 6 is an explanatory diagram showing a conventional antenna device.

FIG. 7 is an explanatory view showing the conventional jack device shown in FIG.

FIG. 8 is an explanatory view showing another embodiment of the conventional jack device shown in FIG.

[Explanation of symbols]

1 jack device, 2 antenna device, 3 first case portion, 4 first motor, 5 first gear portion,
6 1st drive transmission part, 6a 1st external thread part,
7 1st bearing part, 8 2nd case part, 9 2nd motor, 10 2nd gear part, 11 2nd drive transmission part, 11a 2nd male screw part, 12 2nd bearing part, 13 Cylindrical body portion, 13a first female screw portion,
13b Second female thread portion, 18, 18a, 19, 19
a ball portion, 20 jack device, 21 jack device, 22 first drive transmission portion, 22a first female screw portion, 23 second drive transmission portion, 23a second
Female screw part, 24 rod-shaped part, 24a first male screw part, 24b second male screw part, 29 jack device.

Claims (4)

[Claims] An antenna provided rotatably with respect to a support, a connecting portion provided on a back portion of the antenna, a base provided on the support, and one end connected to the connecting portion. An antenna device comprising a jack device connected to the base portion and the other end portion connected to the base portion, wherein the jack device is provided with a plurality of driving means for expanding and contracting a gap between the one end portion and the other end portion. Characteristic antenna device. A first male screw portion rotatably supporting the first male screw portion;
A first drive unit provided on the first case for rotating the first male screw portion, and a first engagement portion for generating a thrust by engaging with the first male screw portion. A second case rotatably supporting the second male screw portion, and a second case provided in the second case for rotating the second male screw portion.
A drive portion, a second engagement portion that engages with the second male screw portion to generate a thrust, and the first engagement portion and the second engagement portion are provided at both ends. An antenna device comprising: a cylindrical tubular body receiving thrust; and a detent portion provided on one of the first case and the second case to prevent rotation of the tubular body. Jack equipment. 3. The cylindrical body is provided with a protrusion protruding laterally from a side surface, and the rotation preventing portion is provided on one of a first case and the second case and protrudes on the other side. The jack device for an antenna device according to claim 2, wherein the jack device abuts on the jack device. 4. A first support for rotatably supporting a first female screw portion.
A first drive unit provided in the first case for rotating the first female screw portion; and a first engagement portion for generating a thrust by engaging with the first female screw portion. A second case rotatably supporting the second female screw portion, and a second case provided in the second case for rotating the second female screw portion.
A driving portion, a second engaging portion that generates a thrust by engaging with the second female screw portion, and the first engaging portion and the second engaging portion are provided at both ends to provide the thrust. Receiving a rod-shaped part,
A protrusion provided on the rod-like portion and projecting laterally from a side surface of the rod-like portion between the first engagement portion and the second engagement portion; the first case and the second A jack device for an antenna device, comprising: a rotation preventing portion provided on one side of the case and protruding to the other side and abutting on the protrusion.