Antenna equipment

Abstract

An antenna device is provided in which the structure of the rotation drive unit that rotates the antenna unit is simplified, the weight is reduced, and the operation of the rotation drive unit is made smoother. [Solution] The antenna device includes an antenna unit, a support pole mounting unit coupled to a support pole, and a rotatable drive unit that is rotatably coupled to the support pole mounting unit in the horizontal direction and rotates the antenna unit horizontally when rotated horizontally. The support pole mounting unit has an internal gear, and the rotatable drive unit has an external gear that meshes with the internal gear and rotates along the inner surface of the internal gear while being driven, thereby rotating the rotatable drive unit horizontally.

Description

Technical Field

[0001] The present invention relates to an antenna apparatus, and more particularly to a multiple-input multiple-output antenna apparatus used in wireless communication technologies such as mobile communication terminals.

Background Art

[0002] Wireless communication technologies, such as Multiple Input Multiple Output (MIMO) technology, are technologies that epochally increase data transmission capacity using multiple antennas. In a transmitter, different data is transmitted via each transmission antenna, and in a receiver, it is a Spatial multiplexing method that separates the transmitted data by appropriate signal processing.

[0003] Therefore, by simultaneously increasing the number of transmit-receive antenna units, the channel capacity increases and more data can be transmitted. For example, when the number of antennas is increased to 10, about 10 times the channel capacity is secured using the same frequency band compared to the current single-antenna system.

[0004] In 4G LTE-advanced, up to 8 antennas are used. Products equipped with 64 or 128 antennas have been developed in the pre-5G stage. As wireless communication technologies develop, it is expected that base station devices with an even larger number of antennas will be used, which is called Massive MIMO technology. Since the Massive MIMO technology enables 3D-Beamforming compared to the operation method of existing 2-Dimension Cells, it is also called FD-MIMO (Full Dimension).

[0005] In Massive MIMO technology, as the number of antennas increases, the number of transmitters and filters also increases. Nevertheless, due to the cost of leasing installation sites and spatial constraints, when installing MIMO antennas, in which RF components (antennas / filters / power amplifiers / transceivers, etc.) and digital components are combined in a layered structure, in a limited space, the need for compact and miniaturized designs for the multiple layers constituting the MIMO antenna arises in order to maximize ease of installation and space utilization.

[0006] Furthermore, since the signal strength to mobile communication terminals can change depending on the direction of the antenna's direction of view, base station antennas need to be tilted (adjusted vertically or vertically) or rotated (adjusted horizontally or horizontally) to adjust the direction of the antenna's direction of view, thereby changing the direction of the signals transmitted and received by the antenna, in order to eliminate shadowed areas.

[0007] Among the techniques for adjusting the directional direction of the aforementioned antenna, as a technique for tilting and rotating the antenna, a "clamping device for an antenna" is disclosed in the Published Patent Publication of the Republic of Korea No. 10-2022-0015959 (2022.02.08) (hereinafter referred to as "Prior Art 1").

[0008] The aforementioned prior art 1 includes a tilting bracket connected to and supporting an antenna, a base bracket provided on a support column and positioned to protrude toward the antenna, an integrated housing to which the tilting bracket is rotatably connected vertically and to the base bracket in a horizontally rotatable manner, a tilting drive unit for rotating the tilting bracket vertically, and a rotation drive unit for rotating the integrated housing horizontally, wherein the tilting drive unit and the rotation drive unit are arranged within the integrated housing.

[0009] However, the conventional technology 1 had the problem of having a complex structure and increased weight because it required arranging multiple worm gears and multiple worm wheel gears constituting the tilting drive unit and the rotation drive unit within the integrated housing.

[0010] Furthermore, among the techniques for adjusting the directional direction of the antenna, as a technique for tilting the antenna, the United States Patent Publication US10511090B2 (December 17, 2019) (hereinafter referred to as "prior art 2") discloses a "wireless telecommunication antenna mount and control system".

[0011] The aforementioned prior art 2 is an antenna mount for use with a communication antenna having at least one AISG antenna control unit (ACU), the antenna mount comprising: a structural interface mounted on an installation structure; an antenna interface mounted on the antenna and rotatably connected to the structural interface via a pivot having a vertical axis, and rotatably movable with respect to the vertical axis within a range of azimuth positions; and a mount azimuth control unit (MACU) mechanically connected to the structural interface and the antenna interface, having a motor, an AISG-compatible motor controller, a male bidirectional AISG port, and a female bidirectional AISG port, and capable of controlling the motor to drive the rotatable movement of the antenna through the range of azimuth positions, wherein the ACU and the MACU are, Both the ACU and the MACU are connected in series to each other via the bidirectional AISG port to an AISG control interface for series remote control, the mount further comprises a mechanical down-tilt assembly mechanically connected to each other between the antenna interface and the antenna, the mechanical down-tilt assembly comprises a lower hinge connector connected between the lower part of the antenna interface and the lower part of the antenna, the lower hinge connector is rotatable about a horizontal axis, the mechanical down-tilt assembly further comprises an upper down-tilt bracket connected between the upper part of the antenna interface and the upper part of the antenna, the upper down-tilt bracket is configured to pivot the antenna relative to the lower hinge connector within a range of tilt angle positions.

[0012] However, the mechanical down-tilt assembly of the prior art 2 is configured in which multiple scissor arms are rotatably connected via multiple pivots, but the weight of the multiple scissor arms and the multiple pivots has the problem that the tilt operation does not become smooth. However, if the weight of the multiple scissor arms and the multiple pivots is forcibly reduced, there is a problem that sufficient rigidity to support the antenna cannot be secured. [Overview of the project] [Problems that the invention aims to solve]

[0013] The technical problem of the present invention is to provide an antenna device that simplifies the structure of a rotation drive unit for rotating an antenna unit, reduces its weight, and enables smooth operation of the rotation drive unit.

[0014] Another technical problem of the present invention is to provide an antenna device that reduces the weight of the tilt drive unit that tilts the antenna unit while ensuring sufficient rigidity, thereby enabling smooth operation of the tilt drive unit.

[0015] Another technical problem of the present invention is to provide an antenna device that allows the antenna unit to be tilted manually or automatically.

[0016] The technical problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0017] To achieve the above objectives, the antenna device according to the present invention comprises an antenna unit, a support column mounting unit, and a rotate drive unit. The support column mounting unit is coupled to a support column. The rotate drive unit is rotatably coupled to the support column mounting unit in the horizontal direction and rotates the antenna unit horizontally when rotated horizontally. An internal gear is formed in the support column mounting unit. An external gear is formed in the rotate drive unit. The external gear meshes with the internal gear and rotates along the inner circumferential surface of the internal gear while driving the rotate drive unit, thereby rotating the rotate drive unit horizontally.

[0018] The internal gear may be formed in an arc shape.

[0019] Rotating shafts, which are rotatably connected to the support column mounting unit, can be formed to protrude from the upper and lower surfaces of the aforementioned rotate drive unit.

[0020] The antenna device according to the present invention may further include a tilt drive unit. The tilt drive unit may have a plurality of tilt members and a plurality of joint bars. The plurality of tilt members can tilt the antenna unit when rotated. The plurality of joint bars can rotatably connect both ends of each of the plurality of tilt members. The rotatable drive unit can be coupled to at least one of the plurality of tilt members.

[0021] The plurality of joint bars may be formed in the shape of a hollow pipe.

[0022] Each of the plurality of tilt members can be connected to at least one bushing. Each of the plurality of joint bars can be rotatably connected to the at least one bushing.

[0023] The plurality of tilt members may be formed in the shape of a hollow pipe.

[0024] Both ends of the plurality of joint bars can be respectively coupled to the plurality of tilt members by a plurality of fixing fastening members.

[0025] Clip through-holes may be formed at both ends of the plurality of joint bars. The plurality of fixing fastening members may be formed of a plurality of clips. The plurality of clips can respectively penetrate through the clip through-holes formed at both ends of the plurality of joint bars. The plurality of clips can respectively couple the plurality of joint bars to the plurality of tilt members.

[0026] Snap ring coupling grooves may be formed on the outer peripheral surfaces at both ends of the plurality of joint bars. The plurality of fixing fastening members may be formed of a plurality of snap rings. The plurality of snap rings can be respectively coupled to the snap ring coupling grooves formed on the outer peripheral surfaces at both ends of the plurality of joint bars. The plurality of snap rings can respectively couple the plurality of joint bars to the plurality of tilt members.

[0027] The plurality of joint bars may be composed of a first joint bar, a second joint bar, a third joint bar, and a fourth joint bar. The second joint bar can be separated forward from the first joint bar. The second joint bar may be arranged parallel to the first joint bar. The third joint bar can be separated upward or downward from between the first joint bar and the second joint bar. The third joint bar may be arranged parallel to the first joint bar and the second joint bar. The fourth joint bar can be separated in a direction opposite to the third joint bar from between the first joint bar and the second joint bar. The fourth joint bar may be arranged parallel to the first joint bar, the second joint bar, and the third joint bar.

[0028] The plurality of tilt members may be composed of a first tilt member, a second tilt member, a third tilt member, and a fourth tilt member. Both ends of the first tilt member can be rotatably coupled to the first joint bar and the third joint bar, respectively. Both ends of the second tilt member can be rotatably coupled to the second joint bar and the third joint bar, respectively. Both ends of the third tilt member can be rotatably coupled to the first joint bar and the fourth joint bar, respectively. Both ends of the fourth tilt member can be rotatably coupled to the second joint bar and the fourth joint bar, respectively.

[0029] An antenna mounting unit can be coupled to the antenna unit. The rotation drive unit can be coupled to the rear surface of the third tilt member. The antenna mounting unit can be coupled to the front surface of the fourth tilt member.

[0030] The first tilt member may consist of a 1-1 tilt member and a 1-2 tilt member. Both ends of the 1-1 tilt member can be rotatably connected to one end of the first joint bar and one end of the third joint bar, respectively. Both ends of the 1-2 tilt member can be rotatably connected to the other end of the first joint bar and the other end of the third joint bar, respectively. The second tilt member may consist of a 2-1 tilt member and a 2-2 tilt member. Both ends of the 2-1 tilt member can be rotatably connected to one end of the second joint bar and one end of the third joint bar, respectively. Both ends of the 2-2 tilt member can be rotatably connected to the other end of the second joint bar and the other end of the third joint bar, respectively. The third tilt member may consist of a 3-1 tilt member and a 3-2 tilt member. Both ends of the 3-1 tilt member can be rotatably connected to one end of the first joint bar and one end of the fourth joint bar, respectively. Both ends of the 3-2 tilt member can be rotatably connected to the other end of the first joint bar and the other end of the fourth joint bar, respectively. The fourth tilt member may consist of a 4-1 tilt member and a 4-2 tilt member. Both ends of the 4-1 tilt member can be rotatably connected to one end of the second joint bar and one end of the fourth joint bar, respectively. Both ends of the 4-2 tilt member can be rotatably connected to the other end of the second joint bar and the other end of the fourth joint bar, respectively.

[0031] Connecting plates may be formed on both sides of the rotate drive unit, which are connected to the rear surface of the 3-1 tilt member and the rear surface of the 3-2 tilt member, respectively. Connecting bars may be formed on the antenna mounting unit, which are connected to the front surface of the 4-1 tilt member and the front surface of the 4-2 tilt member.

[0032] The rotate drive unit may have inclined surfaces on the rear surface of the 3-1 tilt member and the surface facing the rear surface of the 3-2 tilt member. The coupling plate can be formed to protrude from both ends of the inclined surface of the rotate drive unit at the same degree of inclination as the inclined surface. The coupling bar may have inclined surfaces on the front surface of the 4-1 tilt member and the surface facing the front surface of the 4-2 tilt member.

[0033] The connecting bar may be formed in the shape of a hollow pipe.

[0034] The tilt drive unit may further comprise a nut member and a screw bar. The nut member may be positioned on either the third joint bar or the fourth joint bar. The screw bar can be fastened perpendicularly to the nut member. The screw bar rotates the first tilt member, the second tilt member, the third tilt member, and the fourth tilt member when rotated, thereby tilting the antenna unit.

[0035] A first connecting frame, which is a hollow pipe shape, may be arranged on the nut member. First through-holes may be formed on both sides of the first connecting frame, through which either one of the aforementioned components passes. Second through-holes may be formed on the upper and lower sides of the first connecting frame, through which the screw bar passes. A third through-hole may be formed in any one of the aforementioned components, through which the screw bar passes.

[0036] The tilt drive unit may further comprise a mounting bracket and a manual tilt adjustment member. The mounting bracket may be positioned on the third joint bar and the fourth joint bar, or any other. The manual tilt adjustment member can be rotatably positioned on the mounting bracket. The manual tilt adjustment member can be coupled to one end of the screw bar.

[0037] A second connecting frame, which is a hollow pipe shape, may be positioned on the mounting bracket. Fourth through-holes may be formed on both sides of the second connecting frame, through which the other one passes. A fifth through-hole may be formed on the lower side of the second connecting frame, through which the screw bar passes. A sixth through-hole may be formed on the upper side of the second connecting frame, through which the manual tilt adjustment member passes. A seventh through-hole may be formed in the other one, through which the connecting portion of the screw bar and the manual tilt adjustment member passes.

[0038] The tilt drive unit may further include a tilt motor. The tilt motor can be mounted on the mounting bracket. The rotation axis of the tilt motor is connected to the manual tilt adjustment member, which can rotate the screw bar.

[0039] The at least one bush may be cut on one side to form a cut portion. At least a portion of the part of the at least one bush opposite the cut portion can be welded in an arc shape to each of the plurality of tilt members.

[0040] Specific details of other embodiments are included in the detailed description and drawings. [Effects of the Invention]

[0041] In the antenna device according to the present invention, an internal gear is formed in the support pole mounting unit and an external gear is formed in the rotate drive unit. The external gear meshes with the internal gear and rotates along the inner surface of the internal gear while the rotate drive unit is driven, causing the rotate drive unit to rotate horizontally. This simplifies the structure of the rotate drive unit that rotates the antenna unit, reduces its weight, and allows for smoother operation of the rotate drive unit.

[0042] Furthermore, in the antenna device according to the present invention, since the multiple joint bars constituting the tilt drive unit that tilts the antenna unit are formed in the shape of hollow pipes, the weight of the tilt drive unit is reduced while sufficient rigidity is ensured, and the tilt drive unit can be operated smoothly.

[0043] Furthermore, the antenna device according to the present invention allows an operator to manually tilt the antenna unit by rotating a manual tilt adjustment member, and also has the effect of automatically tilting the antenna unit by the operation of the tilt motor by connecting the rotation shaft of the tilt motor to the manual tilt adjustment member.

[0044] Furthermore, in the antenna device according to the present invention, at least one bushing is connected to each end of a plurality of tilt members, and each of the plurality of joint bars is rotatably connected to the at least one bushing, which allows the tilt drive unit to operate smoothly and also reduces operating noise.

[0045] Furthermore, in the antenna device according to the present invention, one side of the at least one bush is cut open to form a cut portion, and at least a portion of the opposite side of the cut portion of the at least one bush is welded in an arc shape to the plurality of tilt members. Therefore, when the plurality of tilt members rotate, the at least one bush expands with respect to the cut portion, which also has the effect of making the rotation of the plurality of tilt members smoother.

[0046] The effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the claims. [Brief explanation of the drawing]

[0047] [Figure 1] A side view showing an antenna device according to an embodiment of the present invention. [Figure 2] This figure shows an enlarged view of the tilt drive unit and the rotate drive unit shown in Figure 1. [Figure 3] Figure 2 is a front perspective view of the tilt drive unit shown. [Figure 4] Figure 2 is a rear bottom perspective view of the tilt drive unit. [Figure 5] Figure 2 is a front perspective view of the antenna mounting unit shown. [Figure 6] Figure 2 is a rear perspective view of the antenna mounting unit shown. [Figure 7] Figure 3 is an exploded perspective view showing the fourth joint bar and the third-first tilt member. [Figure 8] Figure 7 is a cross-sectional view of the bonded state. [Figure 9] Figures 3 and 4 are perspective views showing the nut member, screw bar, and tilt motor. [Figure 10] Figure 9 is a bottom perspective view. [Figure 11] Figures 9 and 10 are exploded perspective views showing the top of each figure. [Figure 12] Figure 11 is a bottom perspective view. [Figure 13] Figures 9 and 10 show the exploded perspective views of the lower parts. [Figure 14] Figure 13 is a bottom perspective view. [Figure 15] Figure 2 is a front perspective view of the rotate drive unit and the support column mounting unit shown. [Figure 16] Figure 15 is a bottom perspective view. [Figure 17] Figure 15 is an exploded perspective view. [Figure 18] This is a side cross-sectional view of Figure 15. [Figure 19] This figure shows another embodiment of the tilt drive unit shown in Figure 3. [Figure 20] Figure 19 shows the fourth snap ring disassembled from the fourth joint bar. [Figure 21] Figure 7 is a perspective view showing another embodiment of the bushing. [Figure 22]This is a side view of Figure 21. [Modes for carrying out the invention]

[0048] Hereinafter, an antenna device according to an embodiment of the present invention will be described with reference to the drawings.

[0049] In the explanation, the term "direction" in terms related to directions such as front, back, up, down, left, and right refers to the same directions as front, back, up, and right shown in Figure 1 and front, back, up, down, left, and right shown in Figure 3.

[0050] Furthermore, in the explanation, "tilt" can mean "rotation with respect to a horizontally positioned center of rotation," and can refer to vertical angle adjustment, up-down angle adjustment, or vertical rotation. Similarly, "rotate" can mean "rotation with respect to a vertically positioned center of rotation," and can refer to horizontal angle adjustment, left-right angle adjustment, or horizontal rotation.

[0051] Figure 1 is a side view showing an antenna device according to an embodiment of the present invention.

[0052] Referring to Figure 1, the antenna device 1 according to an embodiment of the present invention may include a support pole (100), an antenna unit 200, a tilt drive unit 400, and a rotate drive unit 500.

[0053] The support column 100 can be positioned at a distance from the antenna unit 200, rearward. The support column 100 may be formed in the shape of a vertically elongated bar. The support column 100 may be formed in the shape of a bar with a circular cross-section. The support column 100 may be formed in the shape of a hollow pipe. The support column 100 can support the configuration of an antenna device according to embodiments of the present invention, excluding itself.

[0054] The antenna unit 200 can be positioned at a distance in front of the support column 100. The antenna unit 200 may be formed in a roughly rectangular cylindrical shape. Inside the antenna unit 200, a circuit board on which antenna elements are mounted may be provided.

[0055] The tilt drive unit 400 may be positioned in front of the rotate drive unit 500. The tilt drive unit 400 can rotate the antenna unit 200 vertically. That is, the tilt drive unit 400 can tilt the antenna unit 200.

[0056] The rotate drive unit 500 may be positioned behind the tilt drive unit 400. The rotate drive unit 500 can rotate the antenna unit 200 horizontally. In other words, the rotate drive unit 500 can rotate the antenna unit 200.

[0057] The tilt drive unit 400 and the rotate drive unit 500 can be connected between the support column 100 and the antenna unit 200. The tilt drive unit 400 and the rotate drive unit 500 can be coupled to each other.

[0058] The specific structures of the tilt drive unit 400 and the rotate drive unit 500 are described in detail below.

[0059] Figure 2 is an enlarged view of the tilt drive unit and rotate drive unit shown in Figure 1, Figure 3 is a front side perspective view of the tilt drive unit shown in Figure 2, and Figure 4 is a rear bottom perspective view of the tilt drive unit shown in Figure 2.

[0060] Referring to Figures 2 to 4, the tilt drive unit 400 may include a plurality of joint bars 411, 412, 413, and 414, a plurality of tilt members 421, 422, 423, and 424 whose ends are rotatably connected to the plurality of joint bars 411, 412, 413, and 414 respectively, a nut member 430, a screw bar 440, and a tilt motor 450.

[0061] Multiple joint bars 411, 412, 413, 414 can be rotatably connected to the ends of each of the multiple tilt members 421, 422, 423, 424. The multiple joint bars 411, 412, 413, 414 may include a first joint bar 411, a second joint bar 412 positioned parallel to the first joint bar 411 and spaced forward from the first joint bar 411, a third joint bar 413 positioned parallel to the first joint bar 411 and the second joint bar 412 and spaced downward from between the first joint bar 411 and the second joint bar 412, and a fourth joint bar 414 positioned parallel to the first joint bar 411, the second joint bar 412, and the third joint bar 413 and spaced upward in the opposite direction from the third joint bar 413.

[0062] Multiple tilt members 421, 422, 423, and 424 can tilt the antenna unit 200 when it rotates. The multiple tilt members 421, 422, 423, and 424 may include a first tilt member 421 whose ends are rotatably connected to a first joint bar 411 and a third joint bar 413, a second tilt member 422 whose ends are rotatably connected to a second joint bar 412 and a third joint bar 413, a third tilt member 423 whose ends are rotatably connected to a first joint bar 411 and a fourth joint bar 414, and a fourth tilt member 424 whose ends are rotatably connected to a second joint bar 412 and a fourth joint bar 414.

[0063] The first tilt member 421 may be positioned with its upper end closer to the rear and its lower end closer to the front. The second tilt member 422 may be positioned with its upper end closer to the front and its lower end closer to the rear. The third tilt member 423 may be positioned with its upper end closer to the front and its lower end closer to the rear. The fourth tilt member 424 may be positioned with its upper end closer to the rear and its lower end closer to the front.

[0064] The nut member 430 may be placed on the third joint bar 413. However, the nut member 430 may also be placed on the fourth joint bar 414. That is, the nut member 430 may be placed on either the third joint bar 413 or the fourth joint bar 414, and the mounting bracket 460, which will be described later, may be placed on the other of the third joint bar 413 or the fourth joint bar 414.

[0065] The screw bar 440 may be formed to be elongated vertically. The screw bar 440 is fastened perpendicularly to the nut member 430, and when rotated, it rotates the first tilt member 421, the second tilt member 422, the third tilt member 423, and the fourth tilt member 424, thereby tilting the antenna unit 200.

[0066] The tilt motor 450 may be the drive source for rotating the screw bar 440. In the figure, the tilt motor 450 is simply shown as a hexahedron.

[0067] The inner circumferential surface of the nut member 430 may have threads formed on it, and the outer circumferential surface of the screw bar 440 may have threads formed on it that fasten to the threads formed on the inner circumferential surface of the nut member 430 in a screw manner.

[0068] The threads formed on the inner surface of the nut member 430 and the threads formed on the outer surface of the screw bar 440 may be formed as 30-degree (DEG) trapezoidal threads.

[0069] When the threads formed on the inner surface of the nut member 430 and the threads formed on the outer surface of the screw bar 440 are formed as 30-degree (DEG) trapezoidal threads, the advantages are as follows: Firstly, as a moving element, there is no biased load in the thrust direction, resulting in excellent steering ability under high load conditions, and the load transmitted to the tilt motor 450 can be reduced, thus preventing overload of the tilt motor 450. Secondly, it has superior strength compared to the tooth profile of general involute gears of similar size. Thirdly, it has good meshing and good power transmission, making self-locking possible. Fourthly, both automatic operation by the tilt motor 450 and manual operation without the tilt motor 450 are possible. Fifthly, it is possible to move away from an aluminum structure.

[0070] On the other hand, an antenna mounting unit 600 can be attached to the rear surface of the antenna unit 200. The antenna mounting unit 600 will be described in detail below with reference to Figures 5 and 6.

[0071] Figure 5 is a front side perspective view of the antenna mounting unit shown in Figure 2, and Figure 6 is a rear side perspective view of the antenna mounting unit shown in Figure 2.

[0072] Referring to Figures 5 and 6, the antenna mounting unit 600 may include a horizontal bracket 610 that is elongated horizontally, and a pair of vertical brackets 620, 630 that are elongated vertically and coupled to the left and right ends of the horizontal bracket 610, respectively.

[0073] A pair of vertical brackets 620, 630 may include a left vertical bracket 620 and a right vertical bracket 630. A horizontal bracket 610 can connect the upper ends of the pair of vertical brackets 620, 630. That is, the left end of the horizontal bracket 610 can be welded and connected to the upper end of the left vertical bracket 620, and the right end of the horizontal bracket 610 can be welded and connected to the upper end of the right vertical bracket 630.

[0074] The antenna mounting unit 600 can be coupled to the rear surface of the antenna unit 200 via a plurality of bolts or screws. The antenna mounting unit 600 may have a plurality of fastening holes 621, 622, 631, 632 which are coupled to the rear surface of the antenna unit 200 via the plurality of bolts or screws. The plurality of bolts or screws can be coupled to the rear surface of the antenna unit 200 by passing through the plurality of fastening holes 621, 622, 631, 632, respectively.

[0075] The multiple fastening holes 621, 622, 631, and 632 may include a left upper fastening hole 621 formed at the upper end of the left vertical bracket 620, a left lower fastening hole 622 formed at the lower end of the left vertical bracket 620, a right upper fastening hole 631 formed at the upper end of the right vertical bracket 630, and a right lower fastening hole 632 formed at the lower end of the right vertical bracket 630.

[0076] The antenna mounting unit 600 may further include a hook bracket 640. The upper end of the hook bracket 640 can be coupled to the central upper end of the horizontal bracket 610. The remaining portion of the hook bracket 640, excluding the upper end, can be positioned on the rear surface of the horizontal bracket 610 and protrude below the lower end of the horizontal bracket 610.

[0077] Multiple fastening holes 641, 642, 643 may be formed at the upper end of the hook bracket 640, which are connected to the rear surface of the antenna unit 200 via multiple bolts or multiple screws. The multiple bolts or multiple screws can pass through the multiple fastening holes 641, 642, 643, respectively, and be connected to the rear surface of the antenna unit 200. The multiple fastening holes 641, 642, 643 may include a left-side fastening hole 641 formed on the left side of the hook bracket 640, a right-side fastening hole 642 formed on the right side of the hook bracket 640, and a central fastening hole 643 formed in the center of the hook bracket 640.

[0078] A coupling bar 615 may be positioned on the rear surface of the antenna mounting unit 600, extending horizontally. The coupling bar 615 can be positioned below the horizontal bracket 610. A pair of vertical brackets 620 and 630 can be coupled to the left and right ends of the coupling bar 615, respectively. That is, the left end of the coupling bar 615 can be welded to the center of the left vertical bracket 620, and the right end of the coupling bar 615 can be welded to the center of the right vertical bracket 630. The coupling bar 615 can be positioned to protrude behind the pair of vertical brackets 620 and 630.

[0079] The coupling bar 615 can be coupled to the front of the fourth tilt member 424. By coupling the coupling bar 615 to the front of the fourth tilt member 424, the antenna mounting unit 600 can be coupled to the front of the fourth tilt member 424.

[0080] The coupling bar 615 may have an inclined surface 616 on the side facing the front of the fourth tilt member 424. The inclined surface 616 of the coupling bar 615 can be coupled to the front of the fourth tilt member 424.

[0081] The connecting bar 615 can be connected to the front surface of the fourth tilt member 424 via a plurality of bolts (B1, see Figure 2). The front surface of the fourth tilt member 424 may have a plurality of bolt fastening holes (424C, 424D, see Figure 3) which are each fastened to the plurality of bolts B1 for connecting the connecting bar 615 to the front surface of the fourth tilt member 424.

[0082] The coupling bar 615 may be formed in the shape of a hollow pipe. Since the coupling bar 615 is formed in the shape of a hollow pipe, its weight is reduced, allowing the tilt drive unit 400 and the rotate drive unit 500 to operate smoothly.

[0083] On the other hand, as shown in Figures 2 to 4, a support column mounting unit 700 can be attached to the support column 100. The rotate drive unit 500 can be connected to the support column mounting unit 700 so as to be rotatable in the horizontal direction.

[0084] After the first tilt member 421 and the third tilt member 423 are rotatably connected to the first joint bar 411, first clips C1 may be provided at both ends of the first joint bar 411. The first clips C1 can prevent the first joint bar 411 from detaching from the first tilt member 421 and the third tilt member 423.

[0085] After the second tilt member 422 and the fourth tilt member 424 are rotatably coupled to the second joint bar 412, second clips C2 may be provided at both ends of the second joint bar 412. The second clips C2 can prevent the second joint bar 412 from detaching from the second tilt member 422 and the fourth tilt member 424.

[0086] After the first tilt member 421 and the second tilt member 422 are rotatably connected to the third joint bar 413, third clips C3 may be provided at both ends of the third joint bar 413. The third clips C3 can prevent the third joint bar 413 from detaching from the first tilt member 421 and the second tilt member 422.

[0087] After the third tilt member 423 and the fourth tilt member 424 are rotatably connected to the fourth joint bar 414, a fourth clip C4 may be provided at each end of the fourth joint bar 414. The fourth clip C4 can prevent the fourth joint bar 414 from detaching from the third tilt member 423 and the fourth tilt member 424.

[0088] The first tilt member 421 may include a first-first tilt member 421A, whose ends are rotatably connected to one end of the first joint bar 411 and one end of the third joint bar 413, and a first-second tilt member 421B, whose ends are rotatably connected to the other end of the first joint bar 411 and the other end of the third joint bar 413.

[0089] The first-first tilt member 421A may be positioned with its upper end closer to the rear and its lower end closer to the front. The first-second tilt member 421B may be positioned with its upper end closer to the rear and its lower end closer to the front.

[0090] The second tilt member 422 may include a second-first tilt member 422A, whose ends are rotatably connected to one end of the second joint bar 412 and one end of the third joint bar 413, and a second-second tilt member 422B, whose ends are rotatably connected to the other end of the second joint bar 412 and the other end of the third joint bar 413.

[0091] The second-first tilt member 422A may be positioned with its upper end closer to the front and its lower end closer to the rear. The second-second tilt member 422B may be positioned with its upper end closer to the front and its lower end closer to the rear.

[0092] The third tilt member 423 may include a third-first tilt member 423A, whose ends are rotatably connected to one end of the first joint bar 411 and one end of the fourth joint bar 414, and a third-second tilt member 423B, whose ends are rotatably connected to the other end of the first joint bar 411 and the other end of the fourth joint bar 414.

[0093] The 3-1 tilt member 423A may be positioned with its upper end closer to the front and its lower end closer to the rear. The 3-2 tilt member 423B may be positioned with its upper end closer to the front and its lower end closer to the rear.

[0094] The fourth tilt member 424 may include a fourth-first tilt member 424A, whose ends are rotatably connected to one end of the second joint bar 412 and one end of the fourth joint bar 414, and a fourth-second tilt member 424B, whose ends are rotatably connected to the other end of the second joint bar 412 and the other end of the fourth joint bar 414.

[0095] The 4-1 tilt member 424A may be positioned with its upper end closer to the rear and its lower end closer to the front. The 4-2 tilt member 424B may be positioned with its upper end closer to the rear and its lower end closer to the front.

[0096] Multiple bolt fastening holes (424C, see Figure 3) may be formed on the front surface of the 4-1 tilt member 424A, each fastened with a plurality of bolts (B1, see Figure 2). The plurality of bolt fastening holes 424C may be formed as a pair of bolt fastening holes 424C spaced apart from each other along the length of the 4-1 tilt member 424A. Furthermore, multiple bolt fastening holes (424D, see Figure 3) may be formed on the front surface of the 4-2 tilt member 424B, each fastened with a plurality of bolts B1. The plurality of bolt fastening holes 424D may be formed as a pair of bolt fastening holes 424D spaced apart from each other along the length of the 4-2 tilt member 424B.

[0097] The rear surface of the first-first tilt member 421A and the rear surface of the first-second tilt member 421B can be connected by a plate-shaped connecting bar 461.

[0098] Figure 7 is an exploded perspective view showing the fourth joint bar and the third-first tilt member shown in Figure 3, and Figure 8 is a cross-sectional view of the connected state in Figure 7.

[0099] Referring to Figures 7 and 8, the fourth joint bar 414 may be formed in the shape of a hollow pipe. Specifically, the fourth joint bar 414 may be formed in the shape of a hollow circular pipe.

[0100] Of course, like the fourth joint bar 414, the first joint bar 411, the second joint bar 412, and the third joint bar 413 may also be formed in a hollow pipe shape. That is, multiple joint bars 411, 412, 413, and 414 may be formed in a hollow pipe shape, which can reduce the weight of the tilt drive unit 400 and allow the tilt drive unit 400 and the rotate drive unit 500 to operate more smoothly.

[0101] Furthermore, the third-first tilt member 423A may be formed in the shape of a hollow pipe. Specifically, the third-first tilt member 423A may be formed in the shape of a hollow square pipe.

[0102] Of course, like the third-first tilt member 423A, the first-first tilt member 421A, the first-second tilt member 421B, the second-first tilt member 422A, the second-second tilt member 422B, the third-second tilt member 423B, the fourth-first tilt member 424A, and the fourth-second tilt member 424B may also be formed in a hollow pipe shape. That is, the multiple tilt members 421, 422, 423, and 424 may be formed in a hollow pipe shape, which can reduce the weight of the tilt drive unit 400 and allow the tilt drive unit 400 and the rotate drive unit 500 to operate more smoothly.

[0103] Furthermore, bushings 425 can be attached to both ends of the 3-1 tilt member 423A. Of course, just like the 3-1 tilt member 423A, bushings 425 can also be attached to both ends of the 1-1 tilt member 421A, the 1-2 tilt member 421B, the 2-1 tilt member 422A, the 2-2 tilt member 422B, the 3-2 tilt member 423B, the 4-1 tilt member 424A, and the 4-2 tilt member 424B. In other words, bushings 425 can be attached to both ends of the multiple tilt members 421, 422, 423, and 424, and the multiple joint bars 411, 412, 413, and 414 can each be rotatably connected to the bushings 425. The bushings 425 can be attached to the multiple tilt members 421, 422, 423, and 424 by welding around their perimeters. The bush 425 facilitates the rotational operation of the multiple tilt members 421, 422, 423, and 424 during their rotation, and also reduces rotational noise.

[0104] Although the drawings illustrate that one bush 425 is connected to each end of the multiple tilt members 421, 422, 423, and 424, multiple bushes 425 may be connected to each end of the multiple tilt members 421, 422, 423, and 424. That is, at least one bush 425 can be connected to each end of the multiple tilt members 421, 422, 423, and 424, and each of the multiple joint bars 411, 412, 413, and 414 can be rotatably connected to at least one bush 425.

[0105] When one bushing 425 is connected to each end of multiple tilt members 421, 422, 423, and 424, the tolerance of the space in which the bushings 425 are provided is relatively small, and the fluidity of the bushings 425 is relatively reduced, so the rotational movement of the multiple tilt members 421, 422, 423, and 424 may not be relatively smooth. When multiple bushings 425 are connected to each end of multiple tilt members 421, 422, 423, and 424, the tolerance of the space in which the multiple bushings 425 are provided is relatively large, and the fluidity of the multiple bushings 425 is relatively improved, so the rotational movement of the multiple tilt members 421, 422, 423, and 424 may become relatively smooth.

[0106] The bushings 425 may be provided in multiples at both ends of the multiple tilt members 421, 422, 423, and 424, in the direction of the length of each of the multiple joint bars 411, 412, 413, and 414, or multiple bushings 425 may be provided in a manner in which one bushing 425 is inserted into the interior of one of the bushings 425.

[0107] Furthermore, clip through-holes 415 may be formed at the end of the fourth joint bar 414. Clip through-holes 415 may be formed at both ends of the fourth joint bar 414. The fourth clip C4 can pass through the clip through-holes 415 to connect the fourth joint bar 414 to the third-first tilt member 423A.

[0108] Of course, just like the fourth joint bar 414, clip through-holes 415 may also be formed at both ends of the first joint bar 411, the second joint bar 412, and the third joint bar 413. That is, clip through-holes 415 may be formed at both ends of multiple joint bars 411, 412, 413, and 414, and multiple clips (C1, C2, C3, C4, see Figure 2) can pass through the clip through-holes 415 formed at both ends of the multiple joint bars 411, 412, 413, and 414, respectively, and connect the multiple joint bars 411, 412, 413, and 414 to multiple tilt members 421, 422, 423, and 424, respectively. Here, multiple clips C1, C2, C3, and C4 can be used together with multiple snap rings (SR1, SR2, SR3, SR4, see Figures 19 and 20) as multiple fixing fastening members. In other words, the plurality of fixing fastening members can have the function of connecting both ends of the plurality of joint bars 411, 412, 413, and 414 to the plurality of tilt members 421, 422, 423, and 424, respectively.

[0109] Figure 9 is a perspective view showing the nut member, screw bar, and tilt motor shown in Figures 3 and 4; Figure 10 is a bottom perspective view of Figure 9; Figure 11 is an exploded perspective view showing the top of Figures 9 and 10; Figure 12 is a bottom perspective view of Figure 11; Figure 13 is an exploded perspective view showing the bottom of Figures 9 and 10; and Figure 14 is a bottom perspective view of Figure 13.

[0110] Referring to Figures 9 to 14, a first connecting frame 435, which is a hollow pipe shape, may be placed on the nut member 430. The first connecting frame 435 can be connected to the lower side of the nut member 430. The first connecting frame 435 may be formed as a hollow square pipe shape, but it may be formed as a pipe shape of various shapes, including circular, as long as it has a hollow structure.

[0111] First through-holes 435A may be formed on both sides of the first connecting frame 435, through which the third joint bar 413 passes. Second through-holes 435B may be formed on the upper and lower sides of the first connecting frame 435, through which the screw bar 440 passes. A third through-hole 413A may be formed in the third joint bar 413, through which the screw bar 440 passes. The third through-hole 413A may be formed in the middle portion of the left and right lengths of the third joint bar 413.

[0112] The tilt drive unit 400 may further comprise a mounting bracket 460 and a manual tilt adjustment member 445. The mounting bracket 460 may be positioned on the fourth joint bar 414. The mounting bracket 460 may be formed in a plate shape with horizontal surfaces on its upper and lower surfaces. The manual tilt adjustment member 445 can be rotatably positioned on the mounting bracket 460.

[0113] The manual tilt adjustment member 445 can be coupled to the upper end of the screw bar 440. The operator can manually tilt the antenna unit 200 by rotating the screw bar 440 using a tool such as a wrench to rotate the manual tilt adjustment member 445. In this case, the tilt motor 450 is not required. If the tilt motor 450 is provided, the rotation axis of the tilt motor 450 can be coupled to the manual tilt adjustment member 445.

[0114] A second connecting frame 465, which is a hollow pipe shape, may be positioned on the mounting bracket 460. The second connecting frame 465 can be coupled to the underside of the mounting bracket 460. The second connecting frame 465 may be formed as a hollow square pipe shape, but it may be formed as a pipe shape of various shapes, including circular shapes, as long as it has a hollow structure.

[0115] Fourth through-holes 465A may be formed on both sides of the second connecting frame 465, through which the fourth joint bar 414 passes. A fifth through-hole 465B may be formed on the lower side of the second connecting frame 465, through which the screw bar 440 passes. A sixth through-hole 465C may be formed on the upper side of the second connecting frame 465, through which the manual tilt adjustment member 445 passes. The upper end of the screw bar 440 and the lower end of the manual tilt adjustment member 445 can be coupled to each other via a coupler in the internal space of the second connecting frame 465. A seventh through-hole 414A may be formed in the fourth joint bar 414, through which the coupling portions of the screw bar 440 and the manual tilt adjustment member 445 pass. The seventh through-hole 414A may be formed in the middle of the left and right lengths of the fourth joint bar 414.

[0116] The tilt motor 450 can be mounted on the mounting bracket 460. The tilt motor 450 can be mounted on the upper surface of the mounting bracket 460. When the tilt motor 450 is mounted on the mounting bracket 460, the rotation axis of the tilt motor 450 is connected to the manual tilt adjustment member 445, which can rotate the screw bar 440.

[0117] Figure 15 is a front side perspective view of the rotate drive unit and support mounting unit shown in Figure 2, Figure 16 is a bottom perspective view of Figure 15, Figure 17 is an exploded perspective view of Figure 15, and Figure 18 is a side cross-sectional view of Figure 15.

[0118] Referring to Figure 2 and Figures 15-18, the rotate drive unit 500 can be rotatably coupled to the support pole mounting unit 700 in the horizontal direction. The rotate drive unit 500 is rotatably coupled to the support pole mounting unit 700 in the horizontal direction, allowing the antenna unit 200 to rotate horizontally when rotating horizontally.

[0119] In other words, the rotate drive unit 500 is coupled to the tilt drive unit 400, and when it rotates horizontally relative to the support column mounting unit 700, it rotates horizontally together with the tilt drive unit 400, thereby allowing the tilt drive unit 400 to rotate horizontally. Since the antenna unit 200 is coupled to the tilt drive unit 400, when the tilt drive unit 400 rotates horizontally by the rotate drive unit 500, the antenna unit 200 can rotate horizontally together with the tilt drive unit 400.

[0120] Rotating shafts 510 can be formed to protrude from the upper and lower surfaces of the rotate drive unit 500, and are rotatably coupled to the support column mounting unit 700. The rotating shafts 510 may be formed as a single shaft that penetrates the upper and lower surfaces of the rotate drive unit 500. By rotatably coupling the upper and lower ends of the rotating shafts 510 to the support column mounting unit 700, the rotate drive unit 500 can be rotatably coupled to the support column mounting unit 700 in the horizontal direction.

[0121] An internal gear 750 may be formed in the support column mounting unit 700, and an external gear 550 that meshes with the internal gear 750 may be formed in the rotate drive unit 500. The external gear 550 rotates while moving along the inner circumferential surface of the internal gear 750 when the rotate drive unit 500 is driven, thereby allowing the rotate drive unit 500 to rotate horizontally.

[0122] The internal gear 750 may be formed in an arc shape. Multiple gear teeth may be formed on the inner circumferential surface of the internal gear 750. The external gear 550 may be formed in a circular shape. Multiple gear teeth may be formed on the outer circumferential surface of the external gear 550 that mesh with the multiple gear teeth formed on the inner circumferential surface of the internal gear 750.

[0123] The support column mounting unit 700 may include an upper support column mounting unit 700A and a lower support column mounting unit 700B. The upper support column mounting unit 700A and the lower support column mounting unit 700B can be positioned vertically, spaced apart from each other. The upper end of the rotating shaft 510 can be rotatably coupled to a first coupling projection 756 formed on the front surface of the upper support column mounting unit 700A. The lower end of the rotating shaft 510 can be rotatably coupled to a second coupling projection 757 formed on the front surface of the lower support column mounting unit 700B.

[0124] The internal gear 750 may be positioned on the front surface of the upper support mounting unit 700A. The first coupling projection 756 formed on the front surface of the upper support mounting unit 700A can be positioned to protrude inward from the internal gear 750. The external gear 550 may be positioned on the upper surface of the rotate drive unit 500.

[0125] The upper support mounting unit 700A may include a front horizontal bracket 710, a rear horizontal bracket 720, a pair of long bolts 730, and a number of nuts 740. The front horizontal bracket 710 and the rear horizontal bracket 720 may be positioned horizontally. The front horizontal bracket 710 and the rear horizontal bracket 720 may be positioned elongated in the left-right direction. The front horizontal bracket 710 and the rear horizontal bracket 720 may be positioned at the same height as each other.

[0126] The internal gear 750 and the first coupling projection 756 may be formed on the front surface of the front horizontal bracket 710.

[0127] The front horizontal bracket 710 and the rear horizontal bracket 720 may be formed in the shape of a hollow square pipe. The front horizontal bracket 710 and the rear horizontal bracket 720 can be connected by a pair of long bolts 730. The pair of long bolts 730 may be spaced apart from each other on the left and right sides and elongated in the front-to-back direction. Each of the pair of long bolts 730 is fastened with a plurality of nuts 740 so that the recess formed on the rear surface of the front horizontal bracket 710 can be tightly fixed to the front surface of the support column 100, and the recess formed on the front surface of the rear horizontal bracket 720 can be tightly fixed to the rear surface of the support column 100.

[0128] The lower support mounting unit 700B may include a front horizontal bracket 760, a rear horizontal bracket 770, a pair of long bolts 780, and a number of nuts 790. The front horizontal bracket 760 and the rear horizontal bracket 770 may be positioned horizontally. The front horizontal bracket 760 and the rear horizontal bracket 770 may be positioned elongated in the left-right direction. The front horizontal bracket 760 and the rear horizontal bracket 770 may be positioned at the same height as each other.

[0129] The second connecting projection 757 may be formed on the front surface of the front horizontal bracket 760.

[0130] The front horizontal bracket 760 and the rear horizontal bracket 770 may be formed in the shape of a hollow square pipe. The front horizontal bracket 760 and the rear horizontal bracket 770 can be connected by a pair of long bolts 780. The pair of long bolts 780 may be spaced apart from each other on the left and right sides and elongated in the front-to-back direction. Each of the pair of long bolts 780 is fastened with a plurality of nuts 790 so that the recess formed on the rear surface of the front horizontal bracket 760 can be tightly fixed to the front surface of the support column 100, and the recess formed on the front surface of the rear horizontal bracket 770 can be tightly fixed to the rear surface of the support column 100.

[0131] The rotate drive unit 500 can be coupled to at least one of the multiple tilt members 421, 422, 423, and 424. Specifically, the rotate drive unit 500 can be coupled to the rear surface of the third tilt member 423.

[0132] Since the rotate drive unit 500 is coupled to the third tilt member 423, the load acting from the rotate drive unit 500 can be distributed to the first joint bar 411 and the fourth joint bar 414. Furthermore, since the antenna mounting unit 600 is coupled to the fourth tilt member 424, the load acting from the antenna mounting unit 600 can be distributed to the second joint bar 412 and the fourth joint bar 414, which can lead to smoother operation of the tilt drive unit 400 and the rotate drive unit 500.

[0133] Connecting plates 525 may be formed on both sides of the rotate drive unit 500, which are connected to the rear surface of the third-first tilt member 423A and the rear surface of the third-second tilt member 423B, respectively.

[0134] As explained earlier, the coupling bar 615 of the antenna mounting unit 600 can be coupled to the front surfaces of the 4-1 tilt member 424A and the 4-2 tilt member 424B via a number of bolts (B1, see Figure 2). The coupling bar 615 of the antenna mounting unit 600 may have an inclined surface (616, see Figures 2, 5, and 6) on the surface facing the front surfaces of the 4-1 tilt member 424A and the 4-2 tilt member 424B.

[0135] The rotate drive unit 500 may have inclined surfaces 520 formed on the surfaces facing the rear surface of the third-first tilt member 423A and the rear surface of the third-second tilt member 423B. The coupling plate 525 can be formed to protrude from both the left and right ends of the inclined surface 520 of the rotate drive unit 500 at the same degree of inclination as the inclined surface 520.

[0136] Of the connecting plates 525 formed at both the left and right ends of the inclined surface 520, the left connecting plate 525 may have a plurality of bolt fastening holes 525C formed on the rear surface of the 3-1 tilt member 423A via a plurality of bolts (B2, see Figure 2), and the right connecting plate 525 may have a plurality of bolt fastening holes 525D formed on the rear surface of the 3-2 tilt member 423B via a plurality of bolts B2. The plurality of bolt fastening holes 525C may be formed as a pair of bolt fastening holes 525C spaced apart from each other along the length of the left connecting plate 525. Here, the direction of the length of the left connecting plate 525 may be the same as the direction of the length of the 3-1 tilt member 423A. The plurality of bolt fastening holes 525D may be formed as a pair of bolt fastening holes 525D spaced apart from each other along the length of the right connecting plate 525. Here, the direction of the length of the right connecting plate 525 may be the same as the direction of the length of the 3-2 tilt member 423B.

[0137] Multiple bolt fastening holes (423C, see Figure 4) may be formed on the rear surface of the third-first tilt member 423A, each fastened with a plurality of bolts (B2, see Figure 2). The plurality of bolt fastening holes 423C may be formed as a pair of bolt fastening holes 423C spaced apart from each other along the length of the third-first tilt member 423A. Furthermore, multiple bolt fastening holes (423D, see Figure 4) may be formed on the rear surface of the third-second tilt member 423B, each fastened with a plurality of bolts B2. The plurality of bolt fastening holes 423D may be formed as a pair of bolt fastening holes 423D spaced apart from each other along the length of the third-second tilt member 423B.

[0138] On the other hand, the inclined surface (616, see Figure 2) formed on the coupling bar 615 of the antenna mounting unit 600 was joined to the front surface of the 4-1 tilt member 424A and the front surface of the 4-2 tilt member 424B via a plurality of bolts (B1, see Figure 2), but it may also be joined by welding.

[0139] Furthermore, the coupling plate 525 of the rotate drive unit 500 was coupled to the rear surface of the third-first tilt member 423A and the rear surface of the third-second tilt member 423B via a plurality of bolts (B2, see Figure 2), but it may also be coupled by welding.

[0140] On the other hand, while the multiple joint bars 411, 412, 413, and 414 of the tilt drive unit 400 in the above-described embodiment were connected to the multiple tilt members 421, 422, 423, and 424 via multiple clips C1, C2, C3, and C4, they may be connected to the multiple tilt members 421, 422, 423, and 424 via multiple snap rings instead of multiple clips C1, C2, C3, and C4. This will be explained below with reference to Figures 19 and 20.

[0141] Figure 19 shows another embodiment of the tilt drive unit shown in Figure 3, and Figure 20 shows the fourth snap ring disassembled from the fourth joint bar shown in Figure 19.

[0142] Referring to Figures 19 and 20, after the first-first tilt member 421A, the first-second tilt member 421B, the third-first tilt member 423A, and the third-second tilt member 423B are rotatably connected to the first joint bar 411, first snap rings SR1 may be provided at both ends of the first joint bar 411. The first snap rings SR1 can prevent the first joint bar 411 from detaching from the first-first tilt member 421A, the first-second tilt member 421B, the third-first tilt member 423A, and the third-second tilt member 423B.

[0143] After the second joint bar 412 is rotatably connected to the second-first tilt member 422A, the second-second tilt member 422B, the fourth-first tilt member 424A, and the fourth-second tilt member 424B, second snap rings SR2 may be provided at both ends of the second joint bar 412. The second snap rings SR2 can prevent the second joint bar 412 from detaching from the second-first tilt member 422A, the second-second tilt member 422B, the fourth-first tilt member 424A, and the fourth-second tilt member 424B.

[0144] After the first-first tilt member 421A, the first-second tilt member 421B, the second-first tilt member 422A, and the second-second tilt member 422B are rotatably connected to the third joint bar 413, a third snap ring SR3 may be provided at each end of the third joint bar 413. The third snap ring SR3 can prevent the third joint bar 413 from detaching from the first-first tilt member 421A, the first-second tilt member 421B, the second-first tilt member 422A, and the second-second tilt member 422B.

[0145] After the third-first tilt member 423A, the third-second tilt member 423B, the fourth-first tilt member 424A, and the fourth-second tilt member 424B are rotatably connected to the fourth joint bar 414, a fourth snap ring SR4 may be provided at each end of the fourth joint bar 414. The fourth snap ring SR4 can prevent the fourth joint bar 414 from detaching from the third-first tilt member 423A, the third-second tilt member 423B, the fourth-first tilt member 424A, and the fourth-second tilt member 424B.

[0146] Specifically, as shown in Figure 20, a snap ring coupling groove 417 may be formed on the outer circumferential surface of the end of the fourth joint bar 414. The snap ring coupling groove 417 may be formed on the outer circumferential surfaces of both ends of the fourth joint bar 414. The fourth snap ring SR4 is coupled to the snap ring coupling groove 417, allowing the fourth joint bar 414 to be coupled to the third-first tilt member 423A.

[0147] Of course, just like the fourth joint bar 414, snap ring coupling grooves 417 may also be formed on the outer circumferential surfaces of both ends of the first joint bar 411, the second joint bar 412, and the third joint bar 413. That is, snap ring coupling grooves 417 may be formed on the outer circumferential surfaces of both ends of multiple joint bars 411, 412, 413, and 414, and multiple snap rings SR1, SR2, SR3, and SR4 can be coupled to the snap ring coupling grooves 417 formed on the outer circumferential surfaces of both ends of multiple joint bars 411, 412, 413, and 414, respectively, so that multiple joint bars 411, 412, 413, and 414 can be coupled to multiple tilt members 421, 422, 423, and 424, respectively.

[0148] Multiple snap rings SR1, SR2, SR3, and SR4 may be formed in various shapes such as C-type and E-type.

[0149] Figure 21 is a perspective view showing another embodiment of the bush shown in Figure 7, and Figure 22 is a side view of Figure 21.

[0150] Referring to Figures 21 and 22, in the tilt drive unit 400 of the antenna device 1 according to the embodiment of the present invention described above, bushes 425 are provided at both ends of the multiple tilt members 421, 422, 423, and 424, as shown in Figure 7. However, in other embodiments, one side of the bush 425 may be cut open to form a cut portion 425A. At least a portion of the part of the bush 425 opposite to the cut portion 425A can be welded (W) in an arc shape to the multiple tilt members 421, 422, 423, and 424, respectively. Figure 22 discloses a bush 425 that is welded (W) in a semicircular shape as an example of an arc shape.

[0151] Therefore, the bushes 425 provided at both ends of the multiple tilt members 421, 422, 423, and 424, in portions not welded (W) to the multiple tilt members 421, 422, 423, and 424, become elastically fluid due to the cut portion 425A. As a result, the multiple tilt members 421, 422, 423, and 424 rotate smoothly relative to the multiple joint bars 411, 412, 413, and 414 during rotation, which can lead to smooth tilt operation of the tilt drive unit 400.

[0152] On the other hand, in the above embodiment, the multiple tilt members 421, 422, 423, and 424 were each formed in pairs, spaced apart from each other on the left and right sides, with a hollow square pipe shape inside. In other words, in the above embodiment, the first tilt member 421 consists of a 1-1 tilt member 421A and a 1-2 tilt member 421B, both having a hollow square pipe shape, arranged spaced apart from each other on the left and right sides. The second tilt member 422 consists of a 2-1 tilt member 422A and a 2-2 tilt member 422B, both having a hollow square pipe shape, arranged spaced apart from each other on the left and right sides. The third tilt member 423 consists of a 3-1 tilt member 423A and a 3-2 tilt member 423B, both having a hollow square pipe shape, arranged spaced apart from each other on the left and right sides. The fourth tilt member 424 consists of a 4-1 tilt member 424A and a 4-2 tilt member 424B, both having a hollow square pipe shape, arranged spaced apart from each other on the left and right sides.

[0153] However, each of the multiple tilt members 421, 422, 423, and 424 may be formed in the shape of a single rectangular plate. That is, the first tilt member 421 may be formed in the shape of a single rectangular plate, the second tilt member 422 may be formed in the shape of a single rectangular plate, the third tilt member 423 may be formed in the shape of a single rectangular plate, and the fourth tilt member 424 may be formed in the shape of a single rectangular plate.

[0154] Furthermore, in the above embodiment, each of the multiple joint bars 411, 412, 413, and 414 was formed in the shape of a hollow circular pipe. That is, in the above embodiment, the first joint bar 411 was formed in the shape of a hollow circular pipe, the second joint bar 412 was formed in the shape of a hollow circular pipe, the third joint bar 413 was formed in the shape of a hollow circular pipe, and the fourth joint bar 414 was formed in the shape of a hollow circular pipe.

[0155] However, each of the multiple joint bars 411, 412, 413, and 414 may be formed in the shape of a shaft that is not hollow inside. That is, the first joint bar 411 may be formed in the shape of a shaft that is not hollow inside, the second joint bar 412 may be formed in the shape of a shaft that is not hollow inside, the third joint bar 413 may be formed in the shape of a shaft that is not hollow inside, and the fourth joint bar 414 may be formed in the shape of a shaft that is not hollow inside.

[0156] As described above, in the antenna device 1 according to the embodiment of the present invention, an internal gear 750 is formed on the support pole mounting unit 700, and an external gear 550 is formed on the rotate drive unit 500. The external gear 550 meshes with the internal gear 750, and when the rotate drive unit 500 is driven, it rotates and moves along the inner surface of the internal gear 750, causing the rotate drive unit 500 to rotate horizontally. This simplifies the structure of the rotate drive unit 500 that rotates the antenna unit 200, reduces its weight, and allows the rotate drive unit 500 to operate smoothly.

[0157] Furthermore, in the antenna device 1 according to the embodiment of the present invention, the multiple joint bars 411, 412, 413, and 414 constituting the tilt drive unit 400 that tilts the antenna unit 200 are formed in the shape of hollow pipes. As a result, the weight of the tilt drive unit 400 is reduced while sufficient rigidity is ensured, and the tilt drive unit 400 can be operated smoothly.

[0158] Furthermore, in the antenna device 1 according to the embodiment of the present invention, an operator can manually tilt the antenna unit 200 by rotating the manual tilt adjustment member 445, and the rotation axis of the tilt motor 450 can be coupled to the manual tilt adjustment member 445, allowing the antenna unit 200 to be automatically tilted by the operation of the tilt motor 450.

[0159] Furthermore, in the antenna device 1 according to the embodiment of the present invention, at least one bush 425 is connected to both ends of each of the multiple tilt members 421, 422, 423, and 424, and each of the multiple joint bars 411, 412, 413, and 414 is rotatably connected to at least one bush 425, so that the tilt drive unit 400 can operate smoothly and operating noise can be reduced.

[0160] Furthermore, in the antenna device according to the embodiment of the present invention, at least one bush 425 is cut open on one side to form a cut portion 425A, and at least a portion of the part of the bush 425 opposite to the cut portion 425A is welded in an arc shape to the plurality of tilt members 421, 422, 423, and 424, respectively. Therefore, when the plurality of tilt members 421, 422, 423, and 424 rotate, at least one bush 425 flows elastically with respect to the cut portion 425A, so that the rotational operation of the plurality of tilt members 421, 422, 423, and 424 can be smooth.

[0161] A person with ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without altering its technical idea or essential features. Therefore, the embodiments described above should be understood to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, which are set forth below, and all modifications or altered forms derived from the meaning and scope of the claims and the concept of equivalents thereto should be interpreted as being included within the scope of the present invention. [Industrial applicability]

[0162] The present invention provides an antenna device that simplifies the structure of a rotation drive unit for rotating an antenna unit, reduces its weight, and enables smooth operation of the rotation drive unit. [Explanation of Symbols]

[0163] 100: Support pole, 200: Antenna unit 400: Tilt drive unit, 411: First joint bar 412: Second joint bar, 413: Third joint bar 413A: Third through hole, 414: Fourth joint bar 414A: 7th through hole, 415: Clip through hole 417: Snap ring coupling groove, 421: First tilt member 421A: 1st-1st tilt member, 421B: 1st-2nd tilt member 422: Second tilt member, 422A: Second-first tilt member 422B: 2nd-2nd tilt member, 423: 3rd tilt member 423A: 3-1 tilt member, 423B: 3-2 tilt member 424: Fourth tilt member, 424A: Fourth-first tilt member 424B: 4th-2nd tilt member, 425: bushing 425A: Cutting section, 430: Nut component 435: First connecting frame, 435A: First through hole 435B: Second through hole, 440: Screw bar 445: Manual tilt adjustment component, 450: Tilt motor 460: Mounting bracket, 465: Second connecting frame 465A: 4th through-hole, 465B: 5th through-hole 465C: 6th through-hole, 500: Rotate drive unit 510: Rotation axis, 520: Inclined surface 525: Connection plate, 550: External gear 600: Antenna mounting unit, 615: Coupling bar 616: Inclined surface, 700: Support column mounting unit 750: Internal gear, C1, C2, C3, C4: Clips SR1, SR2, SR3, SR4: Snap rings

Claims

1. Antenna unit and A support column mounting unit that is attached to the support column, The system includes a rotation drive unit which is rotatably coupled to the support column mounting unit in the horizontal direction and rotates the antenna unit horizontally when rotated horizontally, The aforementioned support column mounting unit has an internal gear formed therein. An antenna device comprising a rotating drive unit, wherein an external gear is formed which meshes with the internal gear and rotates along the inner surface of the internal gear while the rotating drive unit is driven, thereby rotating the rotating drive unit in the horizontal direction.

2. The antenna device according to claim 1, wherein the internal gear is formed in an arc shape.

3. The antenna device according to claim 1, wherein a rotating shaft is formed protruding from the upper and lower surfaces of the rotate drive unit, and is rotatably coupled to the support column mounting unit.

4. The tilt drive unit further includes a plurality of tilt members that tilt the antenna unit when rotated, and a plurality of joint bars that rotatably connect both ends of each of the plurality of tilt members, The antenna device according to claim 1, wherein the rotation drive unit is coupled to at least one of the plurality of tilt members.

5. The antenna device according to claim 4, wherein the plurality of joint bars are formed in the shape of hollow pipes.

6. At least one bushing is attached to each of the multiple tilt members. The antenna device according to claim 4, wherein each of the plurality of joint bars is rotatably coupled to at least one bushing.

7. The antenna device according to claim 4, wherein the plurality of tilt members are formed in the shape of hollow pipes.

8. The antenna device according to claim 4, further comprising a plurality of fixing fastening members that connect both ends of the plurality of joint bars to the plurality of tilt members, respectively.

9. Clip through-holes are formed at both ends of the aforementioned plurality of joint bars. The antenna device according to claim 8, wherein the plurality of fixing fastening members are formed of a plurality of clips that pass through the clip through holes formed at both ends of the plurality of joint bars, and connect the plurality of joint bars to the plurality of tilt members, respectively.

10. Snap ring coupling grooves are formed on the outer circumferential surfaces of both ends of the plurality of joint bars. The antenna device according to claim 8, wherein the plurality of fixing fastening members are each coupled to the snap ring coupling grooves formed on the outer circumferential surfaces of both ends of the plurality of joint bars, and the plurality of snap rings are formed to connect the plurality of joint bars to the plurality of tilt members, respectively.

11. The aforementioned multiple joint bars are, First joint bar and A second joint bar is positioned parallel to the first joint bar and spaced forward from the first joint bar, A third joint bar is positioned parallel to the first and second joint bars, spaced above or below the first and second joint bars, The antenna device according to claim 4, further comprising: a fourth joint bar positioned parallel to the first joint bar, the second joint bar and the third joint bar, spaced apart from the first joint bar and the second joint bar in the direction opposite to the third joint bar.

12. The aforementioned plurality of tilt members are A first tilt member, the first joint bar and the third joint bar, with both ends rotatably connected to them, A second tilt member, the second joint bar and the third joint bar, with both ends rotatably connected to them, A third tilt member, the first joint bar and the fourth joint bar, with both ends rotatably connected to them, The antenna device according to claim 11, further comprising a fourth tilt member whose ends are rotatably connected to the second joint bar and the fourth joint bar, respectively.

13. The antenna further includes an antenna mounting unit coupled to the antenna unit, The rotation drive unit is coupled to the rear surface of the third tilt member, The antenna device according to claim 12, wherein the antenna mounting unit is coupled to the front surface of the fourth tilt member.

14. The first tilt member is, A first-first tilt member, the first joint bar and the third joint bar, each having both ends rotatably connected to one end of the first joint bar and the third joint bar, It includes first and second tilt members, the other end of which is rotatably connected to the other end of the first joint bar and the other end of the third joint bar, The second tilt member is, A second-first tilt member, the first being rotatably connected at both ends to one end of the second joint bar and the second being connected to one end of the third joint bar, It includes a second-second tilt member, the other end of which is rotatably connected to the other end of the second joint bar and the other end of the third joint bar, The third tilt member is, A third-first tilt member, the first joint bar and the fourth joint bar, each having both ends rotatably connected to the first and fourth joint bars, It includes a third-second tilt member, the other end of which is rotatably connected to the other end of the first joint bar and the other end of the fourth joint bar, The fourth tilt member is, A fourth-first tilt member, the first and fourth joint members, each rotatably connected to one end of the second joint bar and the second joint bar, The antenna device according to claim 12, further comprising a fourth-second tilt member whose ends are rotatably connected to the other end of the second joint bar and the other end of the fourth joint bar, respectively.

15. On both sides of the rotate drive unit, coupling plates are formed which are coupled to the rear surface of the 3-1 tilt member and the rear surface of the 3-2 tilt member, respectively. The antenna device according to claim 14, wherein the antenna mounting unit has a coupling bar that is coupled to the front surface of the 4-1 tilt member and the front surface of the 4-2 tilt member.

16. The rotation drive unit has an inclined surface on the rear surface of the 3-1 tilt member and the surface facing the rear surface of the 3-2 tilt member, and the coupling plate is formed to protrude from both ends of the inclined surface of the rotation drive unit at the same degree of inclination as the inclined surface. The antenna device according to claim 15, wherein the coupling bar has an inclined surface on the front surface of the 4-1 tilt member and the surface facing the front surface of the 4-2 tilt member.

17. The antenna device according to claim 15, wherein the coupling bar is formed in the shape of a hollow pipe.

18. The aforementioned tilt drive unit is A nut member is placed on either the third joint bar or the fourth joint bar, The antenna device according to claim 11, further comprising a screw bar that is fastened perpendicularly to the nut member and rotates the first tilt member, the second tilt member, the third tilt member, and the fourth tilt member when rotated, thereby tilting the antenna unit.

19. The nut member has a first through-hole formed on each side through which one of the aforementioned members passes, and a first connecting frame, which is a hollow pipe shape, has a second through-hole formed on the upper and lower sides through which the screw bar passes. The antenna device according to claim 18, wherein a third through-hole is formed in any one of the above, through which the screw bar passes.

20. The aforementioned tilt drive unit is A mounting bracket is provided on the third joint bar and the other of the fourth joint bar, The antenna device according to claim 18, further comprising a manual tilt adjustment member rotatably disposed on the mounting bracket and coupled to one end of the screw bar.

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