CN113390002A

CN113390002A - Electronic screen system

Info

Publication number: CN113390002A
Application number: CN202110590929.4A
Authority: CN
Inventors: 陈威达
Original assignee: Xiamen Boxuan E Commerce Co ltd
Current assignee: Xiamen Boxuan E Commerce Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-09-14

Abstract

The invention discloses an electronic screen system, which comprises a shell base, wherein a transmission cavity is arranged in the shell base, a transmission device capable of realizing the lifting of the electronic screen is arranged in the transmission cavity, a storage cavity is arranged on the right of the transmission cavity, a storage device which can realize the storage of the disassembled electronic screen is arranged in the storage cavity, four universal wheel mounting blocks are fixedly arranged on the left end surface of the base of the shell, the electronic screen is characterized in that the universal wheel mounting block is rotatably connected with a universal wheel, the electronic screen is provided with a transmission device to realize automatic adjustment of the height of the electronic screen, the steering device is arranged to realize splicing and storage of the electronic screen blocks at a specified position, the storage device can clamp the electronic screen blocks and realize separation of the electronic screen blocks and the electric telescopic rod under the action of the steering device, the electronic screen direction control automation is realized, and the portable carrying of the electronic screen blocks is realized.

Description

Electronic screen system

Technical Field

The invention relates to the technical field of electronic screen touch control, in particular to an electronic screen system.

Background

The invention discloses an electronic screen touch control device, which is a spliced screen body for realizing a large-screen splicing display effect by adopting a professional-grade ultra-narrow-side LCD display unit splicing mode and a splicing control software system.

Disclosure of Invention

It is an object of the present invention to provide an electronic screen system that overcomes the above-mentioned deficiencies of the prior art.

The electronic screen system comprises a shell base, wherein a transmission cavity is arranged in the shell base, a transmission device capable of realizing the lifting of an electronic screen is arranged in the transmission cavity, a storage cavity is arranged on the right side of the transmission cavity, a storage device capable of realizing the storage of the disassembled electronic screen is arranged in the storage cavity, four universal wheel mounting blocks are fixedly arranged on the left end surface of the shell base, universal wheels are rotatably connected onto the universal wheel mounting blocks, a clamping rack is fixedly arranged on the bottom wall of the storage cavity, a shell cover is rotatably connected onto the top surface of the shell base, a first steering mounting block is fixedly arranged on the right wall of the shell cover, a support rod is rotatably connected onto the right end surface of the first steering mounting block and is connected with the clamping rack, a pull rod cavity is arranged in the shell cover, and a first pull rod mounting block and a second pull rod mounting block which are fixedly connected with the front wall and the rear wall are arranged in the pull rod cavity, first pull rod installation piece up end has set firmly the pull rod, the pull rod runs through second pull rod installation piece is run through the shell lid top surface, transmission chamber left side wall has set firmly the third fixed block, the third fixed block rotates and is connected with the second axis of rotation, the axle sleeve has set firmly in the second axis of rotation, the head rod has set firmly on the axle sleeve, the head rod right-hand member face has set firmly the second connecting rod, second connecting rod right-hand member face has set firmly the mounting panel, the electronic screen divides the piece is installed through the branch screen splicing apparatus that can control the telescopic link removal to the mounting panel.

Optionally, the transmission device includes a first motor fixedly arranged on the rear wall of the transmission cavity, a first rotating shaft is rotatably connected to the front end face of the first motor, the first rotating shaft is rotatably connected to and penetrates through a first fixing block fixedly connected to the left wall of the transmission cavity, a cam is fixedly arranged on the front end face of the first rotating shaft, a first mounting block fixedly connected to the left wall of the transmission cavity is fixedly arranged on the upper end face of the first fixing block, a second mounting block fixedly connected to the left wall of the transmission cavity is fixedly arranged on the upper end face of the first mounting block, a first sliding chute is arranged in the second mounting block, a first sliding rod is slidably connected to the first sliding chute, a first sliding block is fixedly arranged on the front end face of the first sliding rod, the first sliding block is slidably connected to a second sliding rod, the second sliding rod penetrates through the first sliding block, and a second fixing block is fixedly arranged on the rear side of the lower end of the second sliding rod, the rear end face of the second fixed block is fixedly provided with a single-groove sliding block, the single-groove sliding block is connected with the cam in a sliding mode, and the upper end face of the second sliding rod is fixedly provided with a pressing block connected with the first connecting rod in a pressing mode.

Optionally, divide screen splicing apparatus including set firmly in four of mounting panel right-hand member face turn to the piece, turn to a right-hand member face and install telescopic link installation piece, electric telescopic handle has set firmly on the telescopic link installation piece, electric telescopic handle right-hand member face has set firmly first screw thread piece, first screw thread piece threaded connection second screw thread piece, electric telescopic handle passes through first screw thread piece with the bent pipe of second screw thread piece threaded connection installation, the bent pipe right-hand member face of installation has set firmly third installation piece, third installation piece right-hand member face with electronic screen divides piece fixed connection, it can let to turn to the device that turns to of assigned position automatically to be equipped with in the piece to turn to electric telescopic handle.

Optionally, storage device including set firmly in store the second motor of preceding back wall of chamber and symmetry, the second motor rotates and is connected with the third axis of rotation, the screw thread has set firmly in the third axis of rotation, third axis of rotation threaded connection has the second slider, second slider downside has set firmly the fixture block, set firmly the third connecting rod of upper and lower symmetry on the second slider opposite face, two the third connecting rod end has set firmly the extrusion piece, the extrusion piece can with the extrusion of electronic screen piecemeal is connected, store chamber right wall and set firmly the guide block of front and back symmetry, the guide block has set firmly the sliding tray, the fixture block with sliding tray sliding connection.

Optionally, the steering device includes a steering cavity disposed in the steering block, a third motor is fixedly disposed on a rear wall of the steering cavity, a fourth rotating shaft is rotatably connected to a front end surface of the third motor, the fourth rotating shaft is rotatably connected to a front wall of the steering cavity, a rotating block is fixedly disposed on the fourth rotating shaft, a fourth mounting block is fixedly disposed on a right end surface of the rotating block, an upper steering block and a lower steering block are fixedly disposed on a right end surface of the fourth mounting block, a second chute is fixedly disposed in the upper steering block and the lower steering block, the second chute is slidably connected to a third slider, a fourth motor is fixedly disposed on an upper wall of the upper steering block and the lower steering block, a fifth rotating shaft is rotatably connected to a lower end surface of the fourth motor, a front steering block and a rear steering block are fixedly disposed on a lower end surface of the fifth rotating shaft, a fifth motor is fixedly disposed on a left wall of the front and rear steering block, and a seventh rotating shaft penetrating through a right wall of the upper steering block and the lower steering block and a right wall of the front and rear steering block is rotatably connected to a right end surface of the fifth motor, and the right end surface of the seventh rotating shaft is fixedly connected with the telescopic rod mounting block.

The invention has the beneficial effects that: the electronic screen split device is provided with the transmission device to realize automatic adjustment of the height of the electronic screen, the steering device can realize splicing and storage of the electronic screen split blocks at the appointed positions, the storage device can clamp the electronic screen split blocks tightly and realize separation of the electronic screen split blocks and the electric telescopic rod under the action of the steering device, and the electronic screen split device realizes automation of electronic screen azimuth control and portable carrying of the electronic screen split blocks.

Drawings

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

FIG. 1 is an overall schematic view of an electronic screen system of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1;

FIG. 3 is a schematic view of the structure at A-A in FIG. 1;

FIG. 4 is a schematic view of the structure at B-B in FIG. 1;

FIG. 5 is a schematic view of the structure at C-C in FIG. 2;

FIG. 6 is a schematic view of the structure of FIG. 2 at D-D;

FIG. 7 is a schematic view of the structure at E-E in FIG. 2;

FIG. 8 is a cross-sectional view of the steering block of FIG. 1;

FIG. 9 is a schematic view of the structure of FIG. 8 at F-F;

fig. 10 is a partial cross-sectional view of the installation bend of fig. 3.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 10, an electronic screen system according to an embodiment of the present invention includes a housing base 12, a transmission cavity 46 is disposed in the housing base 12, a transmission device 101 capable of lifting an electronic screen is disposed in the transmission cavity 46, a storage cavity 26 is disposed at the right side of the transmission cavity 46, a storage device 102 capable of storing a detached electronic screen is disposed in the storage cavity 26, four universal wheel mounting blocks 10 are fixedly disposed on the left end surface of the housing base 12, universal wheels 11 are rotatably connected to the universal wheel mounting blocks 10, a rack 23 is fixedly disposed on the bottom wall of the storage cavity 26, a housing cover 2 is rotatably connected to the top surface of the housing base 12, a first steering mounting block 6 is fixedly disposed on the right wall of the housing cover 2, a support rod 9 is rotatably connected to the right end surface of the first steering mounting block 6, and the support rod 9 is in tooth-locking connection with the rack 23, be equipped with pull rod chamber 34 in the outer cover 2, be equipped with first pull rod installation piece 53 and the second pull rod installation piece 52 of wall behind the fixed connection before the pull rod chamber 34, first pull rod installation piece 53 up end has set firmly pull rod 1, pull rod 1 runs through second pull rod installation piece 52 and run through 2 top surfaces of outer cover, transmission chamber 46 left side wall has set firmly third fixed block 19, third fixed block 19 rotates and is connected with second axis of rotation 18, axle sleeve 17 has set firmly on the second axis of rotation 18, head rod 3 has set firmly on the axle sleeve 17, head rod 3 right-hand member face has set firmly second connecting rod 4, second connecting rod 4 right-hand member face has set firmly mounting panel 5, electronic screen divides piece 16 is installed through the branch screen splicing apparatus 104 that can control the telescopic link removal to mounting panel 5.

Preferably, the transmission device 101 includes a first motor 40 fixedly disposed on the rear wall of the transmission cavity 46, a front end surface of the first motor 40 is rotatably connected with a first rotating shaft 21, the first rotating shaft 21 is rotatably connected with and penetrates through a first fixing block 39 fixedly connected with the left wall of the transmission cavity 46, a front end surface of the first rotating shaft 21 is fixedly provided with a cam 22, an upper end surface of the first fixing block 39 is fixedly provided with a first mounting block 41 fixedly connected with the left wall of the transmission cavity 46, an upper end surface of the first mounting block 41 is fixedly provided with a second mounting block 44 fixedly connected with the left wall of the transmission cavity 46, a first sliding groove 43 is disposed in the second mounting block 44, a first sliding rod 42 is slidably connected with the first sliding groove 43, a first sliding block 36 is fixedly disposed on the front end surface of the first sliding rod 42, the first sliding block 36 is slidably connected with a second sliding rod 20, and the second sliding rod 20 penetrates through the first sliding block 36, a second fixing block 37 is fixedly arranged on the rear side of the lower end of the second slide bar 20, a single-groove slide block 38 is fixedly arranged on the rear end face of the second fixing block 37, the single-groove slide block 38 is slidably connected with the cam 22, a pressing block 45 which is connected with the first connecting rod 3 in a pressing mode is fixedly arranged on the upper end face of the second slide bar 20, the first motor 40 works to drive the first rotating shaft 21 to rotate, the first rotating shaft 21 rotates to drive the cam 22 to rotate, the cam 22 rotates to drive the single-groove slide block 38 to slide, the single-groove slide block 38 slides to drive the second fixing block 37 to move upwards backwards, the second fixing block 37 moves upwards backwards to drive the second slide bar 20 to slide upwards backwards, the second slide bar 20 slides upwards to drive the pressing block 45 to press upwards backwards, and the first slide block 36 moves backwards to drive the first slide bar 42 to slide backwards.

Preferably, the split-screen splicing device 104 comprises four turning blocks 14 fixedly arranged on the right end face of the mounting plate 5, a telescopic rod mounting block 13 is mounted on the right end face of the turning block 14, an electric telescopic rod 15 is fixedly arranged on the telescopic rod mounting block 13, a first thread block 49 is fixedly arranged on the right end face of the electric telescopic rod 15, the first thread block 49 is in threaded connection with a second thread block 51, the electric telescopic rod 15 is in threaded connection with a curved tube 50 through the first thread block 49 and the second thread block 51, a third mounting block 48 is fixedly arranged on the right end face of the curved tube 50, the right end face of the third mounting block 48 is fixedly connected with the electronic screen splitting block 16, a turning device 103 capable of enabling the electric telescopic rod 15 to automatically turn to a specified position is arranged in the turning block 14, the mounting plate 5 is moved to the specified position to drive the turning block 14 to move to the specified position, and the turning block 14 is moved to drive the telescopic rod mounting block 13 to turn, the telescopic link installation block 13 turns to and drives electric telescopic handle 15 to turn to the assigned position, and electric telescopic handle 15 turns to the assigned position and drives the installation bent pipe 50 through first screw block 49 and second screw block 51 threaded connection and moves to the assigned position, and installation bent pipe 50 moves and drives third installation block 48 and move, and third installation block 48 moves and drives electronic screen sub-block 16 to splice into a complete electronic screen at the assigned position.

Preferably, the storage device 102 includes a second motor 27 fixed on the front and rear walls of the storage cavity 26 and having symmetrical positions, the second motor 27 is rotatably connected with a third rotating shaft 28, a thread 29 is fixed on the third rotating shaft 28, the third rotating shaft 28 is threadedly connected with a second sliding block 30, a clamping block 32 is fixed on the lower side of the second sliding block 30, a third connecting rod 33 having symmetrical positions is fixed on the opposite surface of the second sliding block 30, two squeezing blocks 24 are fixed at the ends of the third connecting rods 33, the squeezing blocks 24 can be connected with the electronic screen sub-blocks 16 in a squeezing manner, a guide block 31 having symmetrical positions is fixed on the right wall of the storage cavity 26, a sliding groove 54 is fixed in the guide block 31, the clamping block 32 is slidably connected with the sliding groove 54, the second motor 27 is started to drive the third rotating shaft 28 to rotate, because the clamping block 32 is limited by the sliding groove 54, the second sliding block 30 is driven to move along with the rotation of the third rotating shaft 28, the second sliding block 30 slides to drive the third connecting rod 33 to move, and the third connecting rod 33 moves to drive the extrusion block 24 to extrude and fix the electronic screen sub-block 16 towards the middle.

Preferably, the steering device 103 includes a steering cavity 54 disposed in the steering block 14, a third motor 66 is fixedly disposed on a rear wall of the steering cavity 54, a fourth rotating shaft 61 is rotatably connected to a front end surface of the third motor 66, the fourth rotating shaft 61 is rotatably connected to a front wall of the steering cavity 54, a rotating block 60 is fixedly disposed on the fourth rotating shaft 61, a fourth mounting block 62 is fixedly disposed on a right end surface of the rotating block 60, an upper and lower steering block 55 is fixedly disposed on a right end surface of the fourth mounting block 62, a second sliding slot 69 is fixedly disposed in the upper and lower steering block 55, a third sliding block 68 is slidably connected to the second sliding slot 69, a fourth motor 56 is fixedly disposed on an upper wall of the upper and lower steering block 55, a fifth rotating shaft 57 is rotatably connected to a lower end surface of the fourth motor 56, a front and rear steering block 58 is fixedly disposed on a lower end surface of the fifth rotating shaft 57, a fifth motor 64 is fixedly disposed on a left wall of the front and rear steering block 58, a seventh rotating shaft 67 penetrating the right wall of the up-down turning block 55 and the right wall of the front-rear turning block 58 is rotatably connected to the right end surface of the fifth motor 64, the right end face of the seventh rotating shaft 67 is fixedly connected with the telescopic rod mounting block 13, the third motor 66 is started to drive the fourth rotating shaft 61 to rotate, the fourth rotating shaft 61 rotates to drive the first rotating block 60 to rotate, the rotating block 60 rotates to drive the fourth mounting block 62 to rotate, the fourth mounting block 62 rotates to drive the up-and-down steering block 55 to rotate up and down, the fourth motor 56 is started to drive the fifth rotating shaft 57 to rotate, the fifth rotating shaft 57 rotates to drive the front-and-back steering block 58 to rotate back and forth, the second sliding block 68 slides in the second sliding groove 69, the fifth motor 64 is started to drive the seventh rotating shaft 67 to rotate, and the third motor 66, the fourth motor 56 and the fifth motor 64 drive the telescopic rod mounting block 13 to realize three-dimensional rotation.

In the initial state, the casing cover 2 and the casing base 12 are in a closed state, the pressing block 24 clamps the electronic screen sub-block 16, the first thread block 49 is separated from the second thread block 51, the mounting plate 5 is accommodated in the transmission cavity 46, and the support rod 9 and the latch bar 23 are not clamped.

When the electronic screen assembling device needs to work, the shell cover 2 is manually rotated to be opened, the support rod 9 is driven to rotate to be connected with the clamping teeth of the clamping teeth bar 23, the steering block 14 drives the electric telescopic rod 15 to reach a specified position, the fifth motor 64 rotates, the first thread block 49 is in threaded connection with the second thread block 51, the second motor 27 is started to drive the second slide block 30 to slide, the second slide block 39 slides to enable the extrusion block 24 and the electronic screen sub-block 16 to be loosened, the first motor 40 is started to enable the cam 22 to rotate, the cam 22 rotates to drive the single-groove slide block 38 to slide, the single-groove slide block 38 slides to drive the second slide bar 20 to slide backwards and upwards, the second slide bar 20 slides backwards and upwards to drive the abutting block 45 to abut backwards and upwards, the abutting block 45 abuts backwards and upwards to drive the first connecting rod 3 to lift, the first connecting rod 3 lifts to enable the mounting plate 5 to reach the specified position, and the third motor 66 and the fourth motor 56 are started to, the telescopic rod mounting block 13 turns to a specified position to enable the electronic screen sub-blocks 16 to be spliced at the specified position.

When the electronic screen is reset, the first motor 40 rotates reversely to drive the pressing block 24 to restore, the lifted first connecting rod 3 falls back to drive the mounting plate 5 to restore, the third motor 66 and the fourth motor 56 are started to move the electronic screen sub-block 16 to the restoring position, the second motor 27 is started to drive the extrusion block 24 to be clamped with the electronic screen sub-block 16, the fifth motor 64 rotates to enable the first thread block 49 to be loosened from the second thread block 51, the electric telescopic rod 15 retracts to the restoring position, the supporting rod 9 is loosened from the latch bar 23, and the outer shell cover 2 rotates to be wedged with the outer shell base 12.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An electronic screen system, includes the shell base, its characterized in that: the electronic screen storage device is characterized in that a transmission cavity is arranged in the shell base, a transmission device capable of realizing the lifting of the electronic screen is arranged in the transmission cavity, a storage cavity is arranged on the right side of the transmission cavity, a storage device capable of realizing the storage of the electronic screen after the electronic screen is disassembled is arranged in the storage cavity, four universal wheel mounting blocks are fixedly arranged on the left end face of the shell base, universal wheels are rotatably connected onto the universal wheel mounting blocks, a clamping rack is fixedly arranged on the bottom wall of the storage cavity, a shell cover is rotatably connected onto the top face of the shell base, a first steering mounting block is fixedly arranged on the right wall of the shell cover, a support rod is rotatably connected onto the right end face of the first steering mounting block and is connected with the clamping rack in a clamping manner, a pull rod cavity is arranged in the shell cover, a first pull rod mounting block and a second pull rod mounting block which are fixedly connected with the front wall and the rear wall are arranged in the pull rod cavity, and a pull rod is fixedly connected onto the upper end face of the first pull rod mounting block, the pull rod runs through second pull rod installation piece is run through outer shell cover top surface, transmission chamber left side wall has set firmly the third fixed block, the third fixed block rotates and is connected with the second axis of rotation, the axle sleeve has set firmly in the second axis of rotation, the head rod has set firmly on the axle sleeve, the head rod right-hand member face has set firmly the second connecting rod, second connecting rod right-hand member face has set firmly the mounting panel, the electronic screen divides the piece is installed through the branch screen splicing apparatus that can control the telescopic link removal to the mounting panel.

2. An electronic screen system according to claim 1, wherein: the transmission device comprises a first motor fixedly arranged on the rear wall of the transmission cavity, a first rotating shaft is rotatably connected to the front end face of the first motor, the first rotating shaft is rotatably connected to and penetrates through a first fixing block fixedly connected with the left wall of the transmission cavity, a cam is fixedly arranged on the front end face of the first rotating shaft, a first mounting block fixedly connected with the left wall of the transmission cavity is fixedly arranged on the upper end face of the first fixing block, a second mounting block fixedly connected with the left wall of the transmission cavity is fixedly arranged on the upper end face of the first mounting block, a first sliding chute is arranged in the second mounting block, a first sliding rod is slidably connected in the first sliding chute, a first sliding block is fixedly arranged on the front end face of the first sliding rod, a second sliding rod is slidably connected to the first sliding block, the second sliding rod penetrates through the first sliding block, and a second fixing block is fixedly arranged on the rear side of the lower end of the second sliding rod, the rear end face of the second fixed block is fixedly provided with a single-groove sliding block, the single-groove sliding block is connected with the cam in a sliding mode, and the upper end face of the second sliding rod is fixedly provided with a pressing block connected with the first connecting rod in a pressing mode.

3. An electronic screen system according to claim 1, wherein: divide screen splicing apparatus including set firmly in four of mounting panel right-hand member face turn to the piece, turn to piece right-hand member face and install telescopic link installation piece, electric telescopic handle has set firmly electric telescopic handle on the telescopic link installation piece, electric telescopic handle right-hand member face has set firmly first screw thread piece, first screw thread piece threaded connection second screw thread piece, electric telescopic handle passes through first screw thread piece with the bent pipe of second screw thread piece threaded connection installation, the bent pipe right-hand member face of installation has set firmly third installation piece, third installation piece right-hand member face with electron screen divides piece fixed connection, turn to the piece in be equipped with and let electric telescopic handle turns to the device that turns to of assigned position automatically.

4. An electronic screen system according to claim 1, wherein: storage device including set firmly in store on the chamber preceding back wall and symmetry's second motor, the second motor rotates and is connected with the third axis of rotation, the screw thread has set firmly in the third axis of rotation, third axis of rotation threaded connection has the second slider, second slider downside has set firmly the fixture block, the third connecting rod of upper and lower position symmetry has set firmly on the second slider opposite face, two third connecting rod end has set firmly the extrusion piece, the extrusion piece can with the extrusion of electronic screen piecemeal is connected, store the chamber right wall and set firmly the guide block of front and back position symmetry, the guide block has set firmly the sliding tray, the fixture block with sliding tray sliding connection.

5. An electronic screen system according to claim 3, wherein: the steering device comprises a steering cavity arranged in the steering block, a third motor is fixedly arranged on the rear wall of the steering cavity, the front end face of the third motor is rotatably connected with a fourth rotating shaft, the fourth rotating shaft is rotatably connected with the front wall of the steering cavity, a rotating block is fixedly arranged on the fourth rotating shaft, a fourth installation block is fixedly arranged on the right end face of the rotating block, an upper steering block and a lower steering block are fixedly arranged on the right end face of the fourth installation block, a second chute is fixedly arranged in the upper steering block and the lower steering block, the second chute is slidably connected with a third sliding block, a fourth motor is fixedly arranged on the upper wall of the upper steering block and the lower steering block, the lower end face of the fourth motor is rotatably connected with a fifth rotating shaft, a front steering block and a rear steering block are fixedly arranged on the lower end face of the fifth rotating shaft, a fifth motor is fixedly arranged on the left wall of the front steering block and the rear steering block, and a seventh rotating shaft penetrating through the right wall of the upper steering block and the lower steering block and the right wall of the front steering block and the rear steering block is rotatably connected with the right end face of the fifth motor, and the right end surface of the seventh rotating shaft is fixedly connected with the telescopic rod mounting block.