Transmission device for phase shifter, phase shifter and electrically adjustable antenna

Abstract

The invention discloses a transmission device for a phase shifter, a phase shifter and an electrically adjustable antenna, comprising a transmission unit and a switching mechanism, wherein at least two transmission units are provided and correspond to dielectric plates one by one, the transmission unit comprises a fixing seat, a nut gear, a screw and a guide gear, the nut gear is rotatably arranged on the fixing seat, the screw is screwed with the nut gear, one end of the screw is connected with the corresponding dielectric plate, and the other end of the screw is connected with the guide gear; the switching mechanism comprises a switching gear, the switching gear can move and mesh with different guide gears; the switching gear and the guide gear do not rotate and when the nut gear rotates, the screw can telescope relative to the nut gear to drive the corresponding dielectric plate to telescope. After the switching gear meshes with the guide gear, the switching gear, the guide gear and the screw all stop rotating, the nut gear rotates to make the screw telescope relative to the nut gear to drive the corresponding dielectric plate to telescope, the structure is simpler and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of communication equipment, and in particular to a transmission device for a phase shifter, a phase shifter and an electrically adjustable antenna. Background Art

[0002] The phase shifter is one of the components of the electrically adjustable antenna. The phase of the wave is adjusted by moving the dielectric plate of the phase shifter in a telescopic manner. In the traditional phase shifter structure, the dielectric plate is equipped with a transmission device, which uses a gear set to achieve transmission, so as to pull the dielectric plate to move in a telescopic manner, and finally achieve the phase adjustment function of the phase shifter. However, this multi-gear set transmission device has a complex structure and is relatively expensive. Summary of the invention

[0003] Based on this, it is necessary to provide a transmission device for a phase shifter, a phase shifter and an electrically adjustable antenna; the transmission device for the phase shifter has a simple structure and relatively low cost; the phase shifter includes the aforementioned transmission device for the phase shifter; the electrically adjustable antenna includes the aforementioned phase shifter.

[0004] The technical solution is as follows:

[0005] One embodiment provides a transmission device for a phase shifter, comprising:

[0006] A transmission unit, wherein at least two transmission units are provided and correspond to the medium plates one by one, and the transmission unit comprises a fixed seat, a nut gear, a screw and a guide gear, wherein the nut gear is rotatably arranged on the fixed seat, the screw is screwed with the nut gear, one end of the screw is connected with the corresponding medium plate, and the other end of the screw is connected with the guide gear;

[0007] A switching mechanism includes a switching gear, which can move and mesh with different guide gears; when the switching gear and the guide gear do not rotate and the nut gear rotates, the screw can move telescopically relative to the nut gear to drive the corresponding medium plate to move telescopically.

[0008] The above-mentioned transmission device for the phase shifter, when a certain phase needs to be adjusted, the switching gear moves to the position of the transmission unit corresponding to the phase and meshes with the guide gear, then the switching gear stops rotating, the guide gear stops rotating, and the screw also stops rotating with the guide gear. Although the screw cannot rotate, since the screw is threadedly connected to the nut gear, the nut gear is arranged on the fixed seat and cannot move but can only rotate. Therefore, the nut gear rotates and enables the screw to telescope relative to the nut gear, so as to drive the corresponding medium plate to telescope and move, thereby realizing the adjustment of the phase. When the phase is adjusted in place, the switching gear is disengaged from the guide gear, and the phase adjustment is stopped. Compared with the traditional complex gear set structure, it is simpler and reduces the cost.

[0009] The technical solution is further described below:

[0010] In one embodiment, the switching mechanism further includes an arc-shaped rack, the switching gear is meshed with the arc-shaped rack, and the switching gear can move along the arc-shaped rack to mesh with different guide gears.

[0011] In one embodiment, the switching mechanism further comprises a gear ring, the switching gear is meshed with the gear ring, and the switching gear is movable along the gear ring to mesh with different guide gears.

[0012] In one embodiment, the ring gear is rotatable, and the ring gear rotates and drives the switching gear to rotate, so that the switching gear moves along the ring gear.

[0013] In one embodiment, the ring gear has an inner tooth portion and an outer tooth portion, the switching gear is meshed with the ring gear through the inner tooth portion, and the switching mechanism further includes a first driving gear, which is meshed with the ring gear through the outer tooth portion to drive the ring gear to rotate.

[0014] In one embodiment, at least two switching gears are provided and are spaced apart along the circumference of the gear ring, and the number of the switching gears is less than the number of the guide gears.

[0015] In one of the embodiments, a guide portion is provided at the other end of the screw rod, and the cross-sectional shape of the guide portion is non-circular. The guide gear is provided with a guide groove that cooperates with the guide portion so that the screw rod can telescopically move relative to the guide gear.

[0016] In one embodiment, the transmission unit further comprises a first bearing, the first bearing is arranged on the fixing seat, and the nut gear is rotatably arranged on the fixing seat via the first bearing;

[0017] The transmission unit further comprises a second driving gear, which is meshed with all the nut gears to drive the nut gears to rotate.

[0018] In one of the embodiments, the transmission unit further includes a connecting seat, one end of the screw rod is rotatably connected to the connecting seat, and the medium plate is connected to the connecting seat.

[0019] In one embodiment, the transmission unit further includes a second bearing, the second bearing is disposed on the connecting seat, and one end of the screw rod is rotatably connected to the connecting seat through the second bearing;

[0020] The transmission unit further comprises a first retaining ring and a second retaining ring, wherein the first retaining ring is used to fix the second bearing on the connecting seat, and the second retaining ring is used to prevent the screw rod from being separated from the second bearing.

[0021] In one of the embodiments, the transmission unit further comprises a fixed guide block, wherein the guide block and the fixed seat are respectively located on two opposite sides of the connecting seat, the guide block is provided with a guide hole, and the medium plate is guided and matched with the guide hole.

[0022] In one of the embodiments, the transmission unit also includes a pin shaft, which is arranged on the connecting seat, and one end of the medium plate is rotatably connected to the connecting seat through the pin shaft, and the other end of the medium plate passes through the guide hole to enable the medium plate to cooperate with the guide block.

[0023] Another embodiment provides a phase shifter, comprising a transmission device for a phase shifter as described in any of the above technical solutions.

[0024] The above-mentioned phase shifter, including the above-mentioned transmission device for the phase shifter, reduces the complexity of the structure and reduces the cost.

[0025] Yet another embodiment provides an electrically adjustable antenna, comprising the phase shifter as described in the above technical solution.

[0026] The electrically adjustable antenna, including the aforementioned phase shifter, reduces the complexity of the structure and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] In addition, the drawings are not drawn in a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn in true scale.

[0030] Figure 1 Schematic diagram of the structure of a transmission device for a phase shifter in an embodiment of the present invention;

[0031] Figure 2 for Figure 1Assembly diagram of the screw rod, the connecting seat, the guide block and the medium plate in the embodiment;

[0032] Figure 3 It is a structural diagram of the implementation of the switching gear and the arc-shaped rack in the transmission device of the phase shifter;

[0033] Figure 4 A structural diagram of an implementation for switching gears and ring gears in a transmission device for a phase shifter;

[0034] Figure 5 Another structural diagram of a switching gear and a ring gear in a transmission device for a phase shifter;

[0035] Figure 6 for Figure 1 An assembly structure diagram of a plurality of nut gears meshing with the second drive gear in the embodiment.

[0036] Notes on the attached drawings:

[0037] 110, fixed seat; 111, first bearing; 120, nut gear; 130, screw; 131, threaded portion; 140, guide gear; 150, second drive gear; 160, connecting seat; 161, second bearing; 171, first retaining ring; 172, second retaining ring; 180, guide block; 181, guide hole; 190, pin shaft; 210, switching gear; 221, arc-shaped rack; 222, gear ring; 2221, inner tooth portion; 2222, outer tooth portion; 230, first drive gear; 300, dielectric plate. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] The multi-frequency electrically tunable antenna adjusts the corresponding phase through a phase shifter. Specifically, the dielectric plate 300 of the phase shifter adjusts the corresponding phase by extending and retracting.

[0041] Please refer to Figure 1 , one embodiment provides a transmission device for a phase shifter, comprising a transmission unit and a switching mechanism. Wherein:

[0042] There are at least two transmission units corresponding to the medium plates 300 one by one.

[0043] The medium plate 300 has at least two, and when a certain medium plate 300 is extended or retracted, the position of the medium plate 300 is changed, and the corresponding phase is changed, thereby achieving phase adjustment. In order to meet the extension and retraction movement of at least two medium plates 300, at least two transmission units are configured to correspond to the medium plates 300 one by one.

[0044] like Figure 1 As shown, the transmission unit includes a fixed base 110, a nut gear 120, a screw 130 and a guide gear 140. The nut gear 120 is rotatably arranged on the fixed base 110, the screw 130 is screwed to the nut gear 120, one end of the screw 130 is connected to the corresponding medium plate 300, and the other end of the screw 130 is connected to the guide gear 140.

[0045] like Figure 1 As shown, the switching mechanism includes a switching gear 210, which can move and mesh with different guide gears 140; when the switching gear 210 and the guide gear 140 do not rotate and the nut gear 120 rotates, the screw 130 can telescope relative to the nut gear 120 to drive the corresponding medium plate 300 to telescope.

[0046] The transmission device for the phase shifter, when a certain phase needs to be adjusted, the switching gear 210 moves to the position of the transmission unit corresponding to the phase and meshes with the guide gear 140, then the switching gear 210 stops rotating, the guide gear 140 stops rotating, and the screw 130 also stops rotating along with the guide gear 140. Although the screw 130 cannot rotate, since the screw 130 is threadedly connected with the nut gear 120, the nut gear 120 is arranged on the fixed seat 110 and cannot move but can only rotate. Therefore, the nut gear 120 rotates and enables the screw 130 to telescope relative to the nut gear 120, so as to drive the corresponding medium plate 300 to telescope and move, thereby realizing the adjustment of the phase. When the phase is adjusted in place, the switching gear 210 is disengaged from the guide gear 140, and the phase adjustment is stopped. Compared with the traditional complex gear set structure, it is simpler and reduces the cost.

[0047] like Figure 1 As shown, when phase adjustment is not required, the switching gear 210 is disengaged from the guide gear 140, and at this time, the nut gear 120 can be in a rotating state or in a non-rotating state.

[0048] When the nut gear 120 is in a rotating state, since the guide gear 140 is not restricted by the switching gear 210, the screw 130 and the guide gear 140 thereon both rotate with the nut gear 120, and the screw 130 does not have any telescopic movement along its length direction, so the medium plate 300 does not produce any telescopic movement (the screw 130 can rotate relative to the medium plate 300 when rotating).

[0049] When the nut gear 120 is in a non-rotating state, the screw rod 130 does not move, and thus the medium plate 300 does not generate telescopic movement.

[0050] like Figure 1 As shown, when the corresponding phase adjustment is required, the position of the switching gear 210 is changed so that the switching gear 210 moves to a position where it meshes with the guide gear 140 and meshes with it. The transmission unit where the guide gear 140 is located corresponds to the medium plate 300 whose phase needs to be adjusted. Therefore, the required phase adjustment can be achieved by making the medium plate 300 telescopically move to a certain extent. Specifically:

[0051] When corresponding phase adjustment is required, if the nut gear 120 is always in a rotating state, the guide gear 140 stops rotating after the switching gear 210 is meshed with the guide gear 140. Since the switching gear 210 is meshed with the guide gear 140, the guide gear 140 also stops rotating. Since the other end of the screw 130 is connected to the guide gear 140, the stop of the guide gear 140 also makes the screw 130 unable to rotate. At this time, since the screw 130 is threadedly connected to the nut gear 120 and the nut gear 120 is in a rotating state, the screw 130 is extended and retracted relative to the nut gear 120 along the length direction of the screw 130, thereby driving the medium plate 300 to extend and retract, thereby realizing phase adjustment.

[0052] When corresponding phase adjustment is required, if the nut gear 120 is in a non-rotating state, after the switching gear 210 is meshed with the guide gear 140, the guide gear 140 stops rotating, and the switching gear 210 and the screw 130 do not rotate. Then, the nut gear 120 is rotated. Since the screw 130 is threadedly connected to the nut gear 120, the screw 130 is extended and retracted relative to the nut gear 120 along the length direction of the screw 130, thereby driving the medium plate 300 to extend and retract, thereby realizing phase adjustment.

[0053] Optionally, when the screw rod 130 telescopes relative to the nut gear 120, there are two situations between the screw rod 130 and the guide gear 140:

[0054] One situation is that the screw rod 130 drives the guide gear 140 to move synchronously and retractably, and the guide gear 140 moves relative to the switching gear 210. In this situation, it is necessary to ensure that within the extension range of the screw rod 130, the guide gear 140 and the switching gear 210 are not disengaged and are always in a meshing non-rotating state, and that the screw rod 130 can drive the guide gear 140 to rotate synchronously when rotating.

[0055] Another situation is that the screw rod 130 telescopes relative to the guide gear 140, and the guide gear 140 does not move relative to the switching gear 210. In this case, it is necessary to ensure that within the telescopic range of the screw rod 130, the other end of the screw rod 130 never separates from the guide gear 140, and that the screw rod 130 can drive the guide gear 140 to rotate synchronously when rotating.

[0056] It is understandable that:

[0057] The extension and retraction direction of the screw rod 130 relative to the nut gear 120 can be realized by the forward and reverse rotation of the nut gear 120 to achieve the extension and retraction adjustment of the medium plate 300, which will not be described in detail.

[0058] In one embodiment, please refer to Figure 3 The switching mechanism further includes an arc-shaped rack 221 , and the switching gear 210 is meshed with the arc-shaped rack 221 . The switching gear 210 can move along the arc-shaped rack 221 to mesh with different guide gears 140 .

[0059] This implementation method can be divided into two cases:

[0060] In the first method, the arc-shaped rack 221 is fixed, and the switching gear 210 rotates. During the rotation, the switching gear 210 moves along the arc-shaped rack 221 to reach the guide gear 140 of the transmission unit corresponding to the medium plate 300 that needs phase adjustment and meshes with the guide gear 140 .

[0061] Secondly, the arc-shaped rack 221 can swing / rotate to drive the switching gear 210 to rotate, so that the switching gear 210 moves to the corresponding guide gear 140 and meshes with the guide gear 140 .

[0062] It should be noted that:

[0063] During the meshing process of the switching gear 210 and the arc-shaped rack 221 , a corresponding limit frame or limit plate can be configured to ensure that the switching gear 210 and the arc-shaped rack 221 are always in meshing state and will not disengage through guide grooves or slide rails.

[0064] In another embodiment, please refer to Figure 4 and Figure 5The switching mechanism further includes a gear ring 222 , and the switching gear 210 is meshed with the gear ring 222 . The switching gear 210 can move along the gear ring 222 to mesh with different guide gears 140 .

[0065] like Figure 4 and Figure 5 As shown, the switching gear 210 and the ring gear 222 cooperate to form a planetary gear set. The switching gear 210 moves along the ring gear 222 to engage with different guide gears 140 to achieve the telescopic movement of the corresponding screw 130 and the telescopic movement of the corresponding medium plate 300.

[0066] It can be understood that the switching gear 210 and the ring gear 222 can be at least one movement to achieve the function of the switching gear 210 moving along the ring gear 222.

[0067] It should be noted that:

[0068] During the meshing process of the switching gear 210 and the gear ring 222, a corresponding limit frame or limit plate can be configured to ensure that the switching gear 210 and the gear ring 222 are always in a meshing state through a guide groove or a slide rail, and will not disengage.

[0069] In one embodiment, please refer to Figure 4 and Figure 5 The gear ring 222 is capable of rotating, and the gear ring 222 rotates and drives the switching gear 210 to rotate, so that the switching gear 210 moves along the gear ring 222 .

[0070] like Figure 4 and Figure 5 As shown, the ring gear 222 and the switching gear 210 form a planetary gear set. When the ring gear 222 rotates, it drives the switching gear 210 to rotate. The switching gear 210 rotates passively, so that the switching gear 210 moves along the ring gear 222 to mesh with different guide gears 140.

[0071] In one embodiment, please refer to Figure 4 and Figure 5 The ring gear 222 has an inner tooth portion 2221 and an outer tooth portion 2222, and the switching gear 210 is meshed with the ring gear 222 through the inner tooth portion 2221. The switching mechanism also includes a first driving gear 230, which is meshed with the ring gear 222 through the outer tooth portion 2222 to drive the ring gear 222 to rotate.

[0072] like Figure 4 and Figure 5As shown, the outer tooth portion 2222 of the ring gear 222 meshes with the first drive gear 230, and the inner tooth portion 2221 of the ring gear 222 meshes with the switching gear 210. When the first drive gear 230 rotates, it drives the ring gear 222 to rotate, and the rotation of the ring gear 222 drives the switching gear 210 to rotate, thereby causing the switching gear 210 to move and mesh with different guide gears 140.

[0073] Optionally, the first driving gear 230 may be driven by a first driving member (such as a driving motor).

[0074] In one embodiment, please refer to Figure 5 At least two switching gears 210 are provided and are spaced apart along the circumference of the gear ring 222 , and the number of the switching gears 210 is less than the number of the guide gears 140 .

[0075] like Figure 5 As shown, there are two switching gears 210 and four guide gears 140. When the ring gear 222 rotates, the two switching gears 210 can be driven to move simultaneously, so that the two switching gears 210 are engaged with the corresponding guide gears 140 according to the set requirements, thereby achieving the purpose of telescopic movement and adjustment of the two medium plates 300 at the same time.

[0076] Optionally, after the two switching gears 210 are respectively meshed with the corresponding guide gears 140, the corresponding two medium plates 300 can be adjusted. In this case, if the rotation speeds of the nut gears 120 matched with the screws 130 of the two medium plates 300 are the same or the screws 130 are driven by the same nut gear 120, the expansion and contraction ranges of the two medium plates 300 are the same; if the rotation speeds of the nut gears 120 matched with the screws 130 of the two medium plates 300 are different, the expansion and contraction ranges of the two medium plates 300 may be different. Those skilled in the art can make corresponding settings according to the adjustment range requirements of the medium plates 300, which will not be repeated here.

[0077] In one embodiment, a guide portion is provided at the other end of the screw rod 130 , and the cross-sectional shape of the guide portion is non-circular. The guide gear 140 is provided with a guide groove cooperating with the guide portion so that the screw rod 130 can telescopically move relative to the guide gear 140 .

[0078] The cross-section of the guide portion of the screw 130 can be roughly square or elliptical, etc., so that transmission can be achieved between the screw 130 and the guide gear 140; at the same time, when the screw 130 is extended and retracted along its length direction, the screw 130 can be telescopically moved relative to the guide gear 140.

[0079] In one embodiment, please refer to Figure 1The transmission unit further includes a first bearing 111, which is disposed on the fixing seat 110, and the nut gear 120 is rotatably disposed on the fixing seat 110 via the first bearing 111. The first bearing 111 realizes the rotatable connection between the nut gear 120 and the fixing seat 110.

[0080] In one embodiment, please refer to Figure 1 The transmission unit further includes a second driving gear 150 , which is meshed with all of the nut gears 120 to drive the nut gears 120 to rotate.

[0081] The second driving gear 150 drives all the nut gears 120 to rotate. When the phase adjustment is not required, the second driving gear 150 drives all the nut gears 120 to rotate. Since all the guide gears 140 are not engaged with the switching gear 210, the screw 130 rotates idly and does not move telescopically. When the switching gear 210 is engaged with a certain guide gear 140, the switching gear 210 stops rotating, causing the guide gear 140 to also stop rotating. At this time, the screw 130 cannot rotate but can only move telescopically relative to the nut gear 120, thereby achieving the effect of driving the corresponding medium plate 300 to move telescopically and completing the phase adjustment.

[0082] Optionally, the second driving gear 150 may be driven by a second driving member (such as a driving motor).

[0083] like Figure 1 and Figure 2 As shown, a threaded portion 131 is provided in the middle of the screw rod 130 , and the threaded portion 131 is threadedly connected to the threaded hole of the nut gear 120 to achieve threaded cooperation between the screw rod 130 and the nut gear 120 .

[0084] In one embodiment, please refer to Figure 6 There are four nut gears 120 and one second driving gear 150 . All the nut gears 120 are meshed with the second driving gear 150 , and the four nut gears 120 are arranged at equal intervals along the circumference of the second driving gear 150 .

[0085] In one embodiment, please refer to Figure 1 and Figure 2 The transmission unit further includes a connection seat 160 , one end of the screw rod 130 is rotatably connected to the connection seat 160 , and the medium plate 300 is connected to the connection seat 160 .

[0086] When the screw rod 130 rotates without telescopic movement, the screw rod 130 will not drive the connecting seat 160 to rotate, and thus will not affect the medium plate 300 .

[0087] In one embodiment, please refer to Figure 1 and Figure 2 The transmission unit further includes a second bearing 161 , which is disposed on the connecting seat 160 , and one end of the screw rod 130 is rotatably connected to the connecting seat 160 via the second bearing 161 .

[0088] like Figure 1 From the perspective shown, the upper end of the screw rod 130 is rotatably connected to the connecting seat 160 through the second bearing 161, the lower end of the screw rod 130 is guided and transmitted with the guide gear 140 through the guide portion, and the middle portion of the screw rod 130 is threadedly engaged with the nut gear 120 through the threaded portion 131.

[0089] In one embodiment, please refer to Figure 1 and Figure 2 The transmission unit further includes a first retaining ring 171 and a second retaining ring 172 , wherein the first retaining ring 171 is used to fix the second bearing 161 on the connecting seat 160 , and the second retaining ring 172 is used to prevent the screw rod 130 from being separated from the second bearing 161 .

[0090] In one embodiment, please refer to Figure 1 and Figure 2 The transmission unit further includes a fixed guide block 180 , wherein the guide block 180 and the fixed seat 110 are respectively located on opposite sides of the connecting seat 160 , and the guide block 180 is provided with a guide hole 181 , and the medium plate 300 cooperates with the guide hole 181 in a guiding manner.

[0091] like Figure 2 In the perspective shown, the guide block 180 has a guide hole 181 arranged longitudinally, and the medium plate 300 is guided and matched with the guide hole 181 so that the medium plate 300 can be telescopically moved longitudinally.

[0092] In one embodiment, please refer to Figure 2 The transmission unit also includes a pin shaft 190, which is arranged on the connecting seat 160. One end of the medium plate 300 is rotatably connected to the connecting seat 160 through the pin shaft 190, and the other end of the medium plate 300 passes through the guide hole 181 to enable the medium plate 300 to guide and cooperate with the guide block 180.

[0093] During the telescopic movement of the medium plate 300 , in order to prevent the medium plate 300 from getting stuck with the hole wall of the guide hole 181 , a pin 190 is provided so that the medium plate 300 can swing within the guide hole 181 with a preset amplitude to avoid getting stuck.

[0094] For example, the dielectric plate 300 may be made to have a swing angle within a range of -2° to -2°.

[0095] Another embodiment provides a phase shifter, comprising the transmission device for a phase shifter as described in any one of the above embodiments.

[0096] The phase shifter includes the aforementioned transmission device for the phase shifter, which reduces the complexity of the structure and reduces the cost.

[0097] Yet another embodiment provides an electrically adjustable antenna, comprising the phase shifter as described in the above embodiment.

[0098] The electrically adjustable antenna includes the aforementioned phase shifter, which reduces the complexity of the structure and reduces the cost.

[0099] Optionally, the electrically adjustable antenna includes a control board, and the first driving member and the second driving member are both electrically connected to the control board. The control board can send control signals to the first driving member and the second driving member so that the first driving member drives the first driving gear 230 to rotate or not rotate, and the second driving member drives the second driving gear 150 to rotate or not rotate, which will not be repeated.

[0100] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0104] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0105] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A transmission device for a phase shifter, characterized in that: include: A transmission unit, wherein at least two transmission units are provided and correspond to the medium plates one by one, and the transmission unit comprises a fixed seat, a nut gear, a screw and a guide gear, wherein the nut gear is rotatably arranged on the fixed seat, the screw is screwed with the nut gear, one end of the screw is connected with the corresponding medium plate, and the other end of the screw is connected with the guide gear; A switching mechanism, the switching mechanism comprising a switching gear, the switching gear being movable and meshing with different guide gears; When the switching gear and the guide gear do not rotate and the nut gear rotates, the screw rod can move telescopically relative to the nut gear to drive the corresponding medium plate to move telescopically.

2. The transmission device for a phase shifter according to claim 1, characterized in that: The switching mechanism further includes an arc-shaped rack, the switching gear is meshed with the arc-shaped rack, and the switching gear can move along the arc-shaped rack to mesh with different guide gears.

3. The transmission device for a phase shifter according to claim 1, characterized in that: The switching mechanism further includes a gear ring, the switching gear is meshed with the gear ring, and the switching gear is movable along the gear ring to mesh with different guide gears.

4. The transmission device for a phase shifter according to claim 3, characterized in that: The gear ring is rotatable, and the gear ring rotates and drives the switching gear to rotate, so that the switching gear moves along the gear ring.

5. The transmission device for a phase shifter according to claim 4, characterized in that: The gear ring has an inner tooth portion and an outer tooth portion, the switching gear is meshed with the gear ring through the inner tooth portion, and the switching mechanism further includes a first driving gear, which is meshed with the gear ring through the outer tooth portion to drive the gear ring to rotate.

6. The transmission device for a phase shifter according to claim 4, characterized in that: There are at least two switching gears which are spaced apart along the circumference of the gear ring, and the number of the switching gears is less than the number of the guide gears.

7. The transmission device for a phase shifter according to any one of claims 1 to 6, characterized in that: The other end of the screw rod is provided with a guide portion, the cross-sectional shape of the guide portion is non-circular, and the guide gear is provided with a guide groove matched with the guide portion, so that the screw rod can move telescopically relative to the guide gear.

8. The transmission device for a phase shifter according to any one of claims 1 to 6, characterized in that: The transmission unit further comprises a first bearing, the first bearing being arranged on the fixing seat, and the nut gear being rotatably arranged on the fixing seat via the first bearing; The transmission unit further comprises a second driving gear, which is meshed with all the nut gears to drive the nut gears to rotate.

9. The transmission device for a phase shifter according to any one of claims 1 to 6, characterized in that: The transmission unit further comprises a connection seat, one end of the screw rod is rotatably connected to the connection seat, and the medium plate is connected to the connection seat.

10. The transmission device for a phase shifter according to claim 9, characterized in that: The transmission unit further comprises a second bearing, the second bearing being arranged on the connecting seat, and one end of the screw rod being rotatably connected to the connecting seat via the second bearing; The transmission unit further comprises a first retaining ring and a second retaining ring, wherein the first retaining ring is used to fix the second bearing on the connecting seat, and the second retaining ring is used to prevent the screw rod from being separated from the second bearing.

11. The transmission device for a phase shifter according to claim 9, characterized in that: The transmission unit further comprises a fixed guide block, wherein the guide block and the fixed seat are respectively located at two opposite sides of the connecting seat, the guide block is provided with a guide hole, and the medium plate is guided and matched with the guide hole.

12. The transmission device for a phase shifter according to claim 11, characterized in that: The transmission unit also includes a pin shaft, which is arranged on the connecting seat. One end of the medium plate is rotatably connected to the connecting seat through the pin shaft, and the other end of the medium plate passes through the guide hole to enable the medium plate to cooperate with the guide block.

13. A phase shifter, characterized in that: The invention comprises a transmission device for a phase shifter as claimed in any one of claims 1 to 12.

14. An electrically adjustable antenna, characterized in that: Comprising the phase shifter as claimed in claim 13.

Images