CN216214067U

CN216214067U - Radio and television microwave antenna adjusting device

Info

Publication number: CN216214067U
Application number: CN202123013907.6U
Authority: CN
Inventors: 张彦国; 邢钊; 温敬峰; 高金龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-05
Anticipated expiration: 2031-12-02

Abstract

The utility model provides a radio and television microwave antenna adjusting device, and relates to the technical field of microwave antenna adjusting equipment. The utility model provides a radio and television microwave antenna adjusting device includes the base, the top of base is provided with the mount pad, the supporting seat is installed through damper at the top of mount pad, the top of supporting seat is fixed with the bracing piece, the top of bracing piece is rotated and is provided with the antenna body, the mount pad is provided with coupling mechanism with the junction of supporting seat, the inside of base is formed with the cavity, the link gear has been acceptd to the inside of cavity, slewing mechanism is installed to link gear's drive end, coupling mechanism installs adjustment mechanism with link gear's coupling department. The radio and television microwave antenna adjusting device provided by the utility model can realize convenient and quick installation and disassembly of the antenna body, thereby reducing the installation and disassembly work of workers on the antenna body.

Description

Radio and television microwave antenna adjusting device

Technical Field

The utility model relates to the technical field of microwave antenna adjusting equipment, in particular to a broadcast television microwave antenna adjusting device.

Background

An antenna is a transducer that transforms a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium or vice versa, a component for transmitting or receiving electromagnetic waves in radio equipment, engineering systems for radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing and radio astronomy, and works by means of an antenna, wherever information is transmitted by means of electromagnetic waves.

However, the conventional antenna adjusting device is generally fixed by a bolt during installation, and because the antenna adjusting device is installed in an external environment, when the bolt is in the external environment for a long time, the bolt is easily corroded by weathering of external factors, so that the bolt is rusted, and then a worker cannot disassemble the antenna adjusting device later.

Therefore, there is a need to provide a new microwave antenna adjusting device for broadcast television to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a radio and television microwave antenna adjusting device which can realize convenient and quick installation and disassembly of an antenna body, and further lighten the installation and disassembly work of workers on the antenna body.

The embodiment of the utility model is realized by the following steps:

the utility model provides a radio and television microwave antenna adjusting device, includes the base, the top of base is provided with the mount pad, the supporting seat is installed through damper in the top of mount pad, the top of supporting seat is fixed with the bracing piece, the top of bracing piece is rotated and is provided with the antenna body, the mount pad is provided with coupling mechanism with the junction of supporting seat, the inside of base is formed with the cavity, the link gear has been acceptd to the inside of cavity, slewing mechanism is installed to link gear's drive end, coupling mechanism installs adjustment mechanism with link gear's coupling department.

In some embodiments of the present invention, the rotating mechanism includes a forward and reverse rotating motor installed on the outer wall of the rear side of the base, a shock absorbing seat is supported and arranged at the bottom of the forward and reverse rotating motor, and the front surface of the shock absorbing seat is fixed with the rear surface of the base.

In some embodiments of the utility model, the driving end of the forward and reverse rotation motor is rotatably connected with a rotating shaft, and one end of the rotating shaft, which is far away from the forward and reverse rotation motor, is rotatably extended into the cavity.

In some embodiments of the present invention, the linkage mechanism includes a first bevel gear fixedly sleeved on an outer wall of the end of the rotating shaft, the first bevel gear is located inside the cavity, and two sides of the first bevel gear are engaged with second bevel gears.

In some embodiments of the present invention, the adjusting mechanism includes a screw rod fixedly inserted through the inner surface of the second bevel gear, one end of the screw rod away from the second bevel gear is in bearing connection with the inner wall of one side of the cavity, and a ball nut sleeve is sleeved on the outer surface of the screw rod in a threaded manner.

In some embodiments of the utility model, the connecting mechanism comprises a support rod fixed on the top surface of the ball nut sleeve, one end of the support rod far away from the ball nut sleeve extends to the inside of the sliding groove, and a clamping plate is fixed on the top surface of the support rod.

In some embodiments of the present invention, the connecting mechanism further includes limiting sliding grooves symmetrically formed on the top surface of the mounting seat, the bottom surface of the supporting seat is provided with sliding grooves corresponding to the limiting sliding grooves, and the inner wall of one side of the sliding grooves is provided with clamping grooves.

In some embodiments of the present invention, the damping mechanism includes built-in grooves symmetrically formed on the top surface of the mounting base, sliding rods are fixed inside the built-in grooves, and sliding block sleeves sliding in opposite directions are movably sleeved on the outer surfaces of the sliding rods.

In some embodiments of the present invention, the outer walls of both ends of the sliding rod are surrounded by damping springs, one end of each damping spring is fixed to the inner wall of one side of the built-in groove, and the other end of each damping spring is fixed to the surface of one side of the sliding block sleeve.

In some embodiments of the utility model, the damping mechanism further comprises second hinge seats which are pairwise symmetrically fixed on the bottom surface of the support seat, the interior of each second hinge seat is rotatably connected with a hinge rod through a second rotating rod, one end of each hinge rod, far away from the second rotating rod, is rotatably connected with a first hinge seat through a first rotating rod, and the bottom surface of each first hinge seat is fixed with the top surface of the corresponding slide block sleeve.

The embodiment of the utility model at least has the following advantages or beneficial effects:

1. the rotation of the rotating shaft can be driven through the arranged forward and reverse rotating motor, so that the first bevel gear arranged on the outer wall of the rotating shaft can also rotate along with the rotating shaft, at this time, the two second bevel gears engaged at the two sides of the first bevel gear can rotate along with the rotation of the first bevel gear in opposite directions, so that the two screw rods respectively arranged in the inner walls of the two second bevel gears can rotate along the same side direction along with the rotation of the second bevel gears, so that the two ball nut sleeves respectively sleeved on the outer walls of the two screw rods can move back and forth on the outer walls of the two screw rods in the horizontal direction, at this time, the two support rods respectively arranged on the top surfaces of the two ball nut sleeves can respectively move in the same side direction in the two sliding grooves along with the movement of the two ball nut sleeves, two clamping plates arranged at the tops of the two supporting rods can move in the clamping grooves at the same side; when the antenna body needs to be stably installed on the installation seat, the two clamping plates installed at the tops of the two supporting rods respectively move towards the direction close to the insides of the two clamping grooves until one ends of the two clamping plates are moved to abut against the inner walls of the two clamping grooves, and then the antenna body can be stably installed at the top of the installation seat; otherwise, when the antenna body needs to be disassembled, the two support rods are respectively moved towards the direction far away from the inside of the clamping groove until one ends of the two clamping plates are moved out of the inside of the clamping groove, and then the antenna body can be disassembled from the mounting seat by a worker; then, the antenna body can be conveniently and quickly mounted and dismounted, and further the mounting and dismounting work of the antenna body by workers is reduced.

2. Through the damper who sets up, when the antenna body receives the vibrations from the external world, vibrations can be passed through the articulated seat of second and transmit for the hinge bar, then rotation between articulated bar and the first articulated seat of rethread is connected, vibrations can transmit the slider cover again, make the slider cover that receives vibrations influence can slide on the outer wall of slide bar, cause at this moment can produce the extrusion to damping spring, make it produce elastic deformation, however because damping spring self has the elastic force, can kick-back its extrusion that receives, then can cushion the produced vibrations of external factor to the antenna body and fall, and then realized can playing buffer protection's effect to the antenna body, the stability of antenna body when the external environment moves has been improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a microwave antenna adjusting device for broadcast television according to an embodiment of the present invention;

FIG. 2 is a front cross-sectional view of the base and the mounting base of FIG. 1 according to the present invention;

FIG. 3 is a schematic cross-sectional view of the mounting seat and the supporting seat of FIG. 2;

FIG. 4 is an enlarged view of A in FIG. 2 according to the present invention.

Icon: 1. a base; 2. a mounting seat; 3. a supporting seat; 4. a support bar; 5. an antenna body; 6. a cavity; 7. a damping mechanism; 71. a built-in groove; 72. a slide bar; 73. a damping spring; 74. a slide block sleeve; 75. a first hinge mount; 76. a first rotating lever; 77. a hinged lever; 78. a second rotating rod; 79. a second hinge mount; 8. an adjustment mechanism; 81. a screw; 82. a ball nut sleeve; 9. a connecting mechanism; 91. a strut; 92. clamping a plate; 93. a chute; 94. a card slot; 10. a rotating shaft; 11. a linkage mechanism; 111. a first bevel gear; 112. a second bevel gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "vertical", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1 to 4, a microwave antenna adjusting device for broadcast television comprises a base 1, wherein a mounting base 2 is arranged at the top of the base 1, a supporting base 3 is arranged at the top of the mounting base 2, a supporting rod 4 is fixed at the top of the supporting base 3, and an antenna body 5 is rotatably arranged at the top of the supporting rod 4; the connection position of the mounting seat 2 and the supporting seat 3 is provided with a connecting mechanism 9, a cavity 6 is formed inside the base 1, a linkage mechanism 11 is accommodated inside the cavity 6, the driving end of the linkage mechanism 11 is provided with a rotating mechanism, and a coupling position of the connecting mechanism 9 and the linkage mechanism 11 is provided with an adjusting mechanism 8.

When the antenna body 5 is required to be installed, firstly, the forward and reverse rotation motor is started to enable the rotating shaft 10 to continue to rotate clockwise, then the first bevel gear 111 installed on the outer wall of the rotating shaft 10 can also rotate along the same side direction, at this time, the two second bevel gears 112 engaged with the two sides of the first bevel gear 111 can rotate along with the rotation of the first bevel gear 111 in opposite directions, so that the two screw rods 81 respectively installed in the inner walls of the two second bevel gears 112 can rotate along the same side direction along with the rotation of the second bevel gear 112, so that the two ball nut sleeves 82 respectively sleeved on the outer walls of the two screw rods 81 can move back and forth along the horizontal direction on the outer walls of the two screw rods 81, at this time, the two support rods 91 respectively installed on the top surfaces of the two ball nut sleeves 82 can respectively move along with the movement of the two ball nut sleeves 82 in the same side direction inside the two sliding grooves 93, so that two cardboard 92 installed at two spinal branch 91 tops all can also carry out the homonymy in the inside of draw-in groove 94 and remove, all remove the one end of two cardboard 92 to the inner wall department that supports at two draw-in grooves 94, at this moment alright with the firm top of installing at mount pad 2 of antenna body 5.

When the antenna body 5 needs to be disassembled, the rotating shaft 10 is rotated counterclockwise, however, the two supporting rods 91 are respectively moved towards the direction far away from the inside of the clamping groove 94 until one ends of the two clamping plates 92 are moved out of the inside of the clamping groove 94, and at this time, the worker can disassemble the antenna body 5 from the mounting base 2; then, the antenna body 5 can be conveniently and quickly mounted and dismounted, and further the mounting and dismounting work of the antenna body 5 by workers is reduced.

Referring to fig. 2, the rotating mechanism includes a forward and reverse rotating motor installed on the outer wall of the rear side of the base 1, a shock absorbing seat is arranged at the bottom support of the forward and reverse rotating motor, and the front surface of the shock absorbing seat is fixed to the rear surface of the base 1.

When the antenna is used, the forward and reverse rotating motor is used, so that the rotating shaft 10 can be driven to rotate, the rotating direction of the rotating shaft 10 can be adjusted, and the antenna body 5 is prepared for being detached and installed later; through the shock mount that sets up again, can adjust the produced vibrations of positive reverse motor operation and play the effect of buffering, support, improved the stability of positive reverse motor when the operation then.

Referring to fig. 2, a driving end of the forward and reverse rotation motor is rotatably connected with a rotating shaft 10, and one end of the rotating shaft 10 far away from the forward and reverse rotation motor is rotatably extended into the cavity 6.

When the rotating shaft is used, the rotating shaft 10 can rotate clockwise and anticlockwise through the starting of the forward and reverse rotating motor, so that preparation can be made for the rotation of the driving linkage mechanism 11.

Referring to fig. 2 and 4, the linkage mechanism 11 includes a first bevel gear 111 fixedly secured to an outer wall of the distal end of the rotating shaft 10, the first bevel gear 111 being located inside the cavity 6, and a second bevel gear 112 being engaged with both sides of the first bevel gear 111.

In use, the first bevel gear 111 mounted on the outer wall of the rotating shaft 10 rotates in the same direction with the rotation of the rotating shaft 10 through the rotation of the rotating shaft 10, so that the two second bevel gears 112 engaged with the left and right sides of the first bevel gear 111 rotate therewith, so as to prepare for the rotation of the adjusting mechanism 8.

Referring to fig. 2, the adjusting mechanism 8 includes a screw 81 fixedly disposed on the inner surface of the second bevel gear 112, one end of the screw 81 far from the second bevel gear 112 is in bearing connection with the inner wall of one side of the cavity 6, and a ball nut sleeve 82 is threadedly sleeved on the outer surface of the screw 81.

When in use, the screw 81 installed in the inner wall of the second bevel gear 112 can synchronously rotate along with the rotation of the second bevel gear 112 through the rotation of the second bevel gear 112, so that the ball nut sleeve 82 sleeved on the outer wall of the screw 81 can horizontally move back and forth on the outer wall of the screw 81 along with the rotation of the screw 81, and preparation can be made for fixing or unlocking the connection state of the installation seat 2 and the supporting seat 3 later.

Referring to fig. 2, the connecting mechanism 9 includes a support rod 91 fixed to the top surface of the ball nut sleeve 82, one end of the support rod 91 away from the ball nut sleeve 82 extends into the inside of the slide groove 93, and a catch plate 92 is fixed to the top surface of the support rod 91.

When the antenna body 5 is used, the clamping plates 92 arranged at the tops of the supporting rods 91 can be driven to synchronously move in the sliding grooves 93 in the same side direction by moving the ball nut sleeves 82, when the antenna body 5 needs to be installed, the clamping plates 92 move towards the direction close to the clamping grooves 94 until one ends of the two clamping plates 92 are moved to abut against the inner walls of the two clamping grooves 94, and then the antenna body 5 can be stably installed at the top of the installation seat 2; conversely, when the antenna body 5 is disassembled, the clamping plate 92 is moved towards the direction away from the inside of the clamping groove 94 until one end of the clamping plate 92 is moved out of the inside of the clamping groove 94, and then the worker can disassemble the antenna body 5 from the mounting base 2.

Referring to fig. 2, the connecting mechanism 9 further includes a limiting sliding groove symmetrically formed on the top surface of the mounting base 2, a sliding groove 93 corresponding to the limiting sliding groove is formed on the bottom surface of the supporting base 3, and a clamping groove 94 is formed on an inner wall of one side of the sliding groove 93.

When in use, the sliding groove 93 and the clamping groove 94 are opened, so that the clamping plate 92 can slide in the sliding groove 93, and preparation is made for fixing or disassembling the antenna body 5 later.

Referring to fig. 2, a damping mechanism 7 is disposed at a joint of the mounting base 2 and the supporting base 3, the damping mechanism 7 includes built-in grooves 71 symmetrically formed in a top surface of the mounting base 2, a sliding rod 72 is fixed inside the built-in grooves 71, sliding block sleeves 74 sliding in opposite directions are movably sleeved on outer surfaces of the sliding rod 72, damping springs 73 are respectively wound around outer walls of two ends of the sliding rod 72, one end of each damping spring 73 is fixed to an inner wall of one side of the built-in groove 71, and the other end of each damping spring 73 is fixed to a surface of one side of the sliding block sleeve 74.

When using, when vibrations give slider cover 74 again, slider cover 74 can slide on the outer wall of slide bar 72, cause this moment to produce the extrusion to damping spring 73, make it produce elastic deformation, however because the elastic force that damping spring 73 self has, can kick-back its extrusion that receives, then can buffer the produced vibrations of external factor to antenna body 5 and fall, and then realized can playing the effect of buffer protection to antenna body 5, the stability of antenna body 5 when operation under external environment has been improved.

Referring to fig. 2, the damping mechanism 7 further includes two second hinge seats 79 symmetrically fixed to the bottom surface of the supporting seat 3, the second hinge seats 79 are rotatably connected to a hinge rod 77 through a second rotating rod 78, one end of the hinge rod 77 far away from the second rotating rod 78 is rotatably connected to a first hinge seat 75 through a first rotating rod 76, and the bottom surface of the first hinge seat 75 is fixed to the top surface of the slider sleeve 74.

When the antenna body 5 is subjected to vibration from the outside, the vibration is transmitted to the hinge rod 77 through the second hinge seat 79 and then transmitted to the slider sleeve 74 through the rotating connection between the hinge rod 77 and the first hinge seat 75, so that the vibration can be transmitted to the slider sleeve 74 again, and preparation can be made for elastic buffering of the vibration through the damping spring 73 later.

The working principle of the radio and television microwave antenna adjusting device is as follows:

when the antenna body 5 needs to be installed, firstly, the forward and reverse rotation motor is started, so that the rotating shaft 10 can continue to rotate clockwise, then the first bevel gear 111 installed on the outer wall of the rotating shaft 10 can also rotate in the same side direction, at this time, the two second bevel gears 112 engaged with the two sides of the first bevel gear 111 can rotate in opposite directions along with the rotation of the first bevel gear 111, so that the two screw rods 81 respectively installed in the inner walls of the two second bevel gears 112 can rotate in the same side direction along with the rotation of the second bevel gear 112, so that the two ball nut sleeves 82 respectively sleeved on the outer walls of the two screw rods 81 can move back and forth in the horizontal direction on the outer walls of the two screw rods 81, at this time, the two support rods 91 respectively installed on the top surfaces of the two ball nut sleeves 82 can respectively move in the same side direction in the two sliding grooves 93 along with the movement of the two ball nut sleeves 82, so that two cardboard 92 installed at two spinal branch 91 tops all can also carry out the homonymy in the inside of draw-in groove 94 and remove, all remove the one end of two cardboard 92 to the inner wall department that supports at two draw-in grooves 94, at this moment alright with the firm top of installing at mount pad 2 of antenna body 5.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a radio and television microwave antenna adjusting device, its characterized in that, includes base (1), the top of base (1) is provided with mount pad (2), supporting seat (3) are installed through damper (7) at the top of mount pad (2), the top of supporting seat (3) is fixed with bracing piece (4), the top of bracing piece (4) is rotated and is provided with antenna body (5), mount pad (2) are provided with coupling mechanism (9) with the junction of supporting seat (3), the inside of base (1) is formed with cavity (6), link gear (11) have been acceptd to the inside of cavity (6), slewing mechanism is installed to the drive end of link gear (11), adjustment mechanism (8) are installed with the coupling department of link gear (11) in coupling mechanism (9).

2. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the rotating mechanism comprises a forward and reverse rotating motor which is installed on the outer wall of the rear side of the base (1), the bottom of the forward and reverse rotating motor is supported and provided with a shock absorption seat, and the front surface of the shock absorption seat is fixed with the rear surface of the base (1).

3. A microwave antenna adjusting device for broadcast television as claimed in claim 2, wherein the driving end of the forward and reverse rotation motor is rotatably connected with a rotating shaft (10), and one end of the rotating shaft (10) far away from the forward and reverse rotation motor is rotatably extended into the cavity (6).

4. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the linkage mechanism (11) comprises a first bevel gear (111) fixedly sleeved on the outer wall of the tail end of the rotating shaft (10), the first bevel gear (111) is arranged inside the cavity (6), and two sides of the first bevel gear (111) are engaged with second bevel gears (112).

5. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the adjusting mechanism (8) comprises a screw rod (81) fixedly arranged on the inner surface of the second bevel gear (112), one end of the screw rod (81) far away from the second bevel gear (112) is in bearing connection with the inner wall of one side of the cavity (6), and a ball nut sleeve (82) is sleeved on the outer surface of the screw rod (81) in a threaded manner.

6. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the connecting mechanism (9) comprises a supporting rod (91) fixed on the top surface of the ball nut sleeve (82), one end of the supporting rod (91) far away from the ball nut sleeve (82) extends to the inside of the sliding groove (93), and a clamping plate (92) is fixed on the top surface of the supporting rod (91).

7. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the connecting mechanism (9) further comprises limiting sliding grooves symmetrically formed in the top surface of the mounting seat (2), sliding grooves (93) corresponding to the limiting sliding grooves are formed in the bottom surface of the supporting seat (3), and clamping grooves (94) are formed in the inner wall of one side of each sliding groove (93).

8. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the damping mechanism (7) comprises built-in grooves (71) symmetrically formed on the top surface of the mounting base (2), slide rods (72) are fixed inside the built-in grooves (71), and slide block sleeves (74) which slide oppositely are movably sleeved on the outer surfaces of the slide rods (72).

9. The microwave antenna adjusting device for the broadcast television as claimed in claim 8, wherein the outer walls of the two ends of the sliding rod (72) are surrounded by damping springs (73), one end of each damping spring (73) is fixed with the inner wall of one side of the built-in groove (71), and the other end of each damping spring is fixed with the surface of one side of the sliding block sleeve (74).

10. The microwave antenna adjusting device for the broadcast television as claimed in claim 1, wherein the damping mechanism (7) further comprises second hinge seats (79) fixed on the bottom surface of the supporting seat (3) in pairwise symmetry, the inside of the second hinge seats (79) is rotatably connected with a hinge rod (77) through a second rotating rod (78), one end of the hinge rod (77) far away from the second rotating rod (78) is rotatably connected with a first hinge seat (75) through a first rotating rod (76), and the bottom surface of the first hinge seat (75) is fixed with the top surface of the sliding block sleeve (74).