A rotating lifting mechanism and a display screen horizontal and vertical screen switching mechanism

Abstract

The present invention provides a rotating lifting mechanism and a display screen horizontal and vertical screen switching mechanism, which can realize automatic lifting while rotating; when used in the lifting of the display screen, the lifting of the display screen can be completed while the display screen is rotating to switch between the horizontal and vertical screens, so as to avoid collision between the display screen and the desktop during the rotation process; thereby simplifying the operation steps of switching between the horizontal and vertical screens. The rotating lifting mechanism includes: a working gear, a driving gear, a driven gear, a swing arm, a rack, a force transmission shaft and a sliding plate; the display screen horizontal and vertical screen switching mechanism includes: a display screen connecting plate and a rotating lifting mechanism; when the display screen is rotated to switch from the horizontal screen to the vertical screen, the rotating lifting mechanism automatically rises while following the rotation of the display screen; when the display screen is rotated to switch from the vertical screen to the horizontal screen, the rotating lifting mechanism automatically descends while following the rotation of the display screen.

Description

Technical Field

[0001] The invention relates to a lifting mechanism and a display screen horizontal and vertical screen switching mechanism, in particular to a rotating lifting mechanism and a display screen horizontal and vertical screen switching mechanism, belonging to the technical field of mechanical structures. Background Art

[0002] With the development of AI technology, human-computer interaction will become more intelligent and the scenarios will be more diverse. For this reason, the display screen needs to be able to switch between horizontal and vertical screens at will. However, in the existing technology, multiple actions are required to switch between horizontal and vertical screens. For example, most of the current solutions require the display screen to be raised first, and then the display screen can be rotated to switch completely, so as to avoid collision between the display screen and the desktop during rotation. Summary of the invention

[0003] In view of this, the present invention provides a rotary lifting mechanism that can directly realize automatic lifting by rotation.

[0004] The technical solution of the present invention is: a rotary lifting mechanism, comprising: a working gear, a driving gear, a driven gear, a swing arm, a rack, a force transmission shaft and a sliding plate;

[0005] The force transmission shaft is a rotation input component; the force transmission shaft passes through a sliding plate that is slidably matched with the mounting frame and is coaxially connected to the driving gear;

[0006] The driven gear is meshed with the driving gear; the working gear is coaxially fixedly connected with the driven gear;

[0007] The lower end of the swing arm is coaxially connected to the working gear and the driven gear through a friction assembly, and the upper end is coaxially arranged with the power transmission shaft; the friction assembly is used to provide resistance to the rotation of the working gear and the driven gear around their own axes;

[0008] The swing arm is used to drive the working gear and the driven gear to swing around the axis of the power transmission shaft;

[0009] The mounting frame is provided with a rack matched with the working gear, and the working gear can mesh with the rack after swinging around the axis of the force transmission shaft at a set angle.

[0010] As a preferred embodiment of the present invention, a left rack and a right rack are vertically arranged on the mounting frames on the left and right sides of the working gear respectively;

[0011] When the working gear is swung to the left at a set angle, it can mesh with the left rack; when the working gear is swung to the right at a set angle, it can mesh with the right rack.

[0012] As a preferred embodiment of the present invention, it also includes a limiting structure;

[0013] The limiting structure includes a limiting block arranged at the lower end of the swing frame;

[0014] A limiting sliding groove is provided at a position on the mounting frame corresponding to the limiting block;

[0015] When the working gear swings and meshes with the rack, the limiting block enters the corresponding limiting sliding groove and slides in cooperation with the limiting sliding groove.

[0016] As a preferred embodiment of the present invention, the mounting frame is connected with sliding guide bars on the left and right sides, the sliding plate is located between the sliding guide bars on both sides, and is slidably matched with the sliding grooves arranged on the left and right sliding guide bars respectively.

[0017] As a preferred embodiment of the present invention, it also includes an upward movement to position limit assembly;

[0018] The upward movement into position limiting assembly comprises: a limiting block and an upward movement into position limiting pin;

[0019] A limit block is provided on the end surface of the driving gear facing the sliding plate, and a limit pin is provided on the end surface of the corresponding end of the sliding plate in the rotation direction of the driving gear.

[0020] When the driving gear rotates until the limit block thereon contacts the limit pin, it indicates that the upward movement has reached the correct position.

[0021] As a preferred embodiment of the present invention, it also includes a downward moving prompt component;

[0022] The downward moving prompting assembly comprises: a prompting ball, a prompting ball pressing unit and a prompting ball track groove arranged on the end surface of the driving gear;

[0023] The end surface of the driving gear facing the sliding plate is provided with a prompt ball track groove; the prompt ball track groove includes a spherical crown groove located on the vertical symmetry line of the driving gear and located at the lower part of the end surface, and an arc groove connected to the spherical crown groove, the arc groove is concentric with the driving gear; the arc groove and the spherical crown groove are transitioned by a convexity;

[0024] The prompt ball pressing unit is used to press the prompt ball into the prompt ball track groove;

[0025] When the active gear rotates, the prompt ball track groove and the prompt ball roll together. When the active gear rotates until the spherical crown groove corresponds to the prompt ball position, the prompt ball passes over the protrusion from the arc groove and enters the spherical crown groove, prompting it to move up to the correct position.

[0026] As a preferred embodiment of the present invention, the prompt ball pressing unit comprises: a spring and a positioning pin arranged on the mounting cylinder;

[0027] The installation cylinder is coaxially sleeved on the outside of the force transmission shaft and fixedly connected to the sliding plate;

[0028] The installation tube is provided with a protrusion with an inner hole for installing a spring at a position corresponding to the prompt ball; the spring is located in the inner hole, one end of the spring contacts the prompt ball, and the other end is positioned by a positioning pin;

[0029] By adjusting the screwing depth of the positioning pin, the pressing force of the spring on the prompt ball can be adjusted.

[0030] In addition, based on the above-mentioned rotating and lifting mechanism, the present invention provides a horizontal and vertical screen switching mechanism for the display screen, which can directly rotate the display screen to achieve the switching between horizontal and vertical screens. During the switching process, the display screen automatically rises to avoid collision between the display screen and the desktop, thereby simplifying the horizontal and vertical screen switching action.

[0031] The display screen horizontal and vertical switching mechanism comprises: a display screen connecting plate and the above-mentioned rotating lifting mechanism, and the display screen is mounted on the display screen connecting plate;

[0032] The display screen connecting plate is connected to the force transmission shaft of the rotating lifting mechanism through a universal shaft, so as to transmit the rotation of the display screen to the force transmission shaft;

[0033] When the display screen is rotated to switch from the horizontal screen to the vertical screen, the rotating lifting mechanism automatically rises while following the rotation of the display screen; when the display screen is rotated to switch from the vertical screen to the horizontal screen, the rotating lifting mechanism automatically descends while following the rotation of the display screen.

[0034] As a preferred embodiment of the present invention, it also includes a display screen bearing member;

[0035] The display screen load-bearing member is installed between the top cross bar of the mounting frame and the sliding plate;

[0036] A reel of a display screen load-bearing member is arranged on the top cross bar of the mounting frame, and when the sliding plate moves up and down, the display screen load-bearing member is retracted and released through the reel.

[0037] As a preferred embodiment of the present invention, it also includes a cable organizer; the cable organizer is arranged on a cable organizer mounting plate, the cable organizer mounting plate is fixedly connected to the sliding plate, and moves up and down following the display sliding plate; the display screen signal line is wound around the cable organizer.

[0038] Beneficial effects:

[0039] (1) The rotary lifting mechanism of the present invention can realize automatic lifting while rotating. When used in the lifting of a display screen, the lifting of the display screen can be completed while the display screen is rotated to switch between the horizontal and vertical screens, thereby avoiding the display screen from colliding with the desktop during the rotation process. This simplifies the operation steps of switching between the horizontal and vertical screens.

[0040] (2) In the horizontal and vertical screen switching mechanism of the display screen of the present invention, racks are symmetrically arranged on the left and right; the display screen can be switched between the horizontal and vertical screens when it is rotated to the left or right; and the display screen can be switched between the horizontal and vertical screens by rotating the display screen with one hand, thereby improving the user experience.

[0041] (3) The present invention provides a limiting structure to prevent the working gear from being disengaged from the rack during operation, thereby improving the reliability of the switching mechanism.

[0042] (4) In the present invention, an upward movement limit component and a downward movement prompt component are also provided, wherein the upward movement limit component can realize the upward movement limit when the horizontal screen is switched to the vertical screen; the downward movement prompt component can realize the prompt when the display screen moves down to the position.

[0043] (5) In the present invention, a display screen load-bearing member is further provided to support the weight of the display screen during the lifting process, thereby improving the reliability of the switching mechanism.

[0044] (6) In the present invention, a cable organizer is also provided so that the display screen signal lines can move synchronously during the lifting and lowering of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a front view of the horizontal and vertical screen switching mechanism of the display screen of the present invention;

[0046] Figure 2 It is a rear view of the horizontal and vertical screen switching mechanism of the display screen of the present invention;

[0047] Figure 3 It is a right side cross-sectional view of the horizontal and vertical screen switching mechanism of the display screen of the present invention;

[0048] Figure 4 It is a top cross-sectional view of the horizontal and vertical screen switching mechanism of the display screen of the present invention;

[0049] Figure 5 for Figure 3 A magnified view of the middle friction assembly and the lower shift prompt assembly;

[0050] Figure 6 It is a structural schematic diagram of the driving gear;

[0051] Figure 7 A schematic diagram of the arrangement of the limit pins that move upward to the position;

[0052] Figure 8 A schematic diagram of a cable manager.

[0053] Among them: 1-working gear; 2-driving gear, 201-limit block, 202-prompt ball track groove; 3-left rack; 4-driven gear; 5-front swing arm; 6-right rack; 7-sliding plate, 701-upward limit pin; 8-force transmission shaft; 9-universal shaft; 10-display screen connecting plate; 11-rear swing arm; 12-left slide; 13-right limit block; 14-left limit block; 15-right slide; 16-right limit slide; 17-left limit slide; 18-mounting frame; 19-load-bearing spring; 20-mounting cylinder, 21-friction assembly, 210-nut, 211-spring sheet, 212-friction plate, 22-downward move into position prompt assembly, 220-prompt ball, 221-spring, 222-locating pin, 23-cable organizer. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0055] Embodiment 1:

[0056] This embodiment provides a rotary lifting mechanism, which can achieve automatic lifting while rotating.

[0057] like Figure 1-Figure 4 As shown, the rotary lifting mechanism includes: a working gear 1, a driving gear 2, a driven gear 4, a front swing arm 5, a rear swing arm 11, a left rack 3, a right rack 6, a force transmission shaft 8, a sliding plate 7 and a limiting structure.

[0058] The force transmission shaft 8 is a rotation input component, which is used to transmit external rotation (such as rotation of the display screen) to the rotary lifting mechanism; the force transmission shaft 8 passes through the sliding plate 7 that slides with the mounting frame 18 and is coaxially connected to the driving gear 2.

[0059] The driven gear 4 is located below the driving gear 2 and meshes with the driving gear 2; the working gear 1 is located in front of the driven gear 4 and is a sector gear, which is coaxially fixed to the driven gear 4 as a whole (or the two are an integrated structure).

[0060] The front swing arm 5 and the rear swing arm 11 are respectively arranged at the front and rear sides of the gear set formed by the working gear 1, the driven gear 4 and the driving gear 2. The lower ends of the front swing arm 5 and the rear swing arm 11 are coaxially connected to the working gear 1 and the driven gear 4 through the friction assembly 21, and the upper ends are coaxially arranged with the power transmission shaft 8. The friction assembly 21 is used to provide resistance to the rotation of the working gear 1 and the driven gear 4 around their own axes (the resistance value can be adjusted to the friction assembly 21 as needed), so that the working gear 1 is easier to swing relative to the rotation around its own axis; due to the setting of the friction assembly 21, when the driving gear 2 rotates, it can first drive the working gear 1 to swing left and right around the axis of the power transmission shaft 8 through the front swing arm 5 and the rear swing arm 11.

[0061] Racks are vertically arranged on the mounting frame 18 on the left and right sides or one side of the working gear 1.

[0062] As an example, a rack is vertically arranged on the mounting frame 18 on one side of the working gear 1. When the working gear 1 swings around the force transmission shaft 8 to the direction of the rack at a set angle, it can mesh with the rack (that is, the working gear 1 can only swing in one direction at this time).

[0063] As another example, racks are vertically arranged on the mounting frames 18 on the left and right sides of the working gear 1, and rotation and lifting can be achieved when the working gear 1 is rotated to the left or right. The two racks are the left rack 3 and the right rack 6; when the working gear 1 swings to the left around the force transmission shaft 8 at a set angle, it can mesh with the left rack 3; when the working gear 1 swings to the right around the force transmission shaft 8 at a set angle, it can mesh with the right rack 6.

[0064] As an example, the working gear 1 is designed to mesh with the right rack 6 after swinging 5° to the right around the force transmission shaft 8, and to mesh with the left rack 3 after swinging 5° to the left around the force transmission shaft 8.

[0065] The mounting frame 18 is connected to sliding guide bars on the left and right sides, and the sliding plate 7 is located between the sliding guide bars on both sides; the left sliding guide bar is provided with a left sliding groove 12, and the right sliding guide bar is provided with a right sliding groove 15; the left and right sides of the sliding plate 7 extend into the left sliding groove 12 and the right sliding groove 15 respectively, and slide in cooperation with the left sliding groove 12 and the right sliding groove 15.

[0066] When the force transmission shaft 8 rotates, it can transmit the rotation to the driving gear 2; due to the setting of the friction component 21, when the driving gear 2 rotates, it can first drive the driven gear 4, the working gear 1, the front swing arm 5 and the rear swing arm swing 11 to swing around the axis of the force transmission shaft 8.

[0067] The limiting structure is used to ensure that when the working gear 1 swings around the axis of the power transmission shaft 8 to mesh with the rack, the working gear 1 is prevented from returning and disengaging during operation.

[0068] The limiting structure includes: a limiting block and a limiting groove.

[0069] As an example, when a rack is vertically arranged on the mounting frame 18 on only one side of the working gear 1, a limit block is arranged on the corresponding side of the lower end of the rear swing frame 11. The limit block is integrated with the rear swing arm 11 and can swing along with the rear swing arm 11 around the axis of the force transmission shaft 8. A limit slot is arranged at a position corresponding to the limit block on the mounting frame. The limit slot is a full-stroke limit slot and is not shorter than the moving stroke of the sliding plate 7. When the working gear 1 swings around the axis of the force transmission shaft 8 and meshes with the rack, the limit block at the lower end of the rear swing frame 11 enters the limit slot and slides with the limit slot, thereby preventing the working gear 1 from being disengaged from the meshing of the rack during operation.

[0070] As an example, when racks are vertically arranged on the mounting frames 18 on the left and right sides of the working gear 1, limit blocks are arranged on the left and right sides of the lower end of the rear swing frame 11, which are the right limit block 13 and the left limit block 14 respectively; the right limit block 13 and the left limit block 14 are integrated with the rear swing arm 11, and can swing left and right around the axis of the force transmission shaft 8 following the rear swing arm 11.

[0071] A left limit slot 17 is provided at a position on the mounting frame corresponding to the left limit block 14 , and a right limit slot 16 is provided at a position corresponding to the right limit block 13 ; the left limit slot 17 and the right limit slot 16 are full-stroke limit slots, which are not shorter than the moving stroke of the sliding plate 7 .

[0072] When the working gear 1 swings to the left around the axis of the force transmission shaft 8 and engages with the left rack 3, the left limit block 14 at the lower end of the rear swing frame 11 enters the left limit slot 17 and slides with the left limit slot 17, thereby preventing the working gear 1 from returning, disengaging and engaging with the left rack 3 during operation; when the working gear 1 swings to the right around the axis of the force transmission shaft 8 and engages with the right rack 6, the right limit block 13 at the lower end of the rear swing frame 11 enters the right limit slot 16 and slides with the right limit slot 16, thereby preventing the working gear 1 from returning, disengaging and engaging with the right rack 6 during operation.

[0073] Embodiment 2:

[0074] Based on the above-mentioned implementation 1, this embodiment provides a horizontal and vertical screen switching mechanism for the display screen based on the rotating and lifting mechanism. The rotating and lifting mechanism is used in the horizontal and vertical screen switching of the display screen. The display screen can be directly rotated with one hand to realize the switching between the horizontal and vertical screens. During the switching process, the display screen automatically rises to avoid collision between the display screen and the desktop.

[0075] The display screen horizontal and vertical switching mechanism comprises: a display screen connecting plate 10 and a rotating lifting mechanism; the rotating lifting mechanism is connected to the display screen through the display screen connecting plate 10; the rotating lifting mechanism can convert the rotation of the display screen into a linear motion in the vertical direction, so that the display screen rises or falls while rotating, that is, when the display screen is rotated to switch from the horizontal screen to the vertical screen, the display screen is automatically raised while rotating; when the display screen is rotated to switch from the vertical screen to the horizontal screen, the display screen is automatically lowered while rotating.

[0076] The display screen horizontal and vertical switching mechanism is set on the back of the display screen. For the convenience of description, the "left" and "right" in the following are "left" and "right" when the display screen horizontal and vertical switching mechanism is facing forward, that is, "left" and "right" when facing the display screen horizontal and vertical switching mechanism. Figure 2 As shown, the display screen horizontal and vertical switching mechanism is connected to the display screen via a display screen connecting plate 10 on the back.

[0077] As an example, one end of the display screen connecting plate 10 is connected to the display screen, and the other end is supported on the universal shaft 9; the universal shaft 9 ensures that the display screen can be flexibly pitched and rotated left and right; the universal shaft 9 is a cross axis, having a horizontally set pitch axis and an azimuth axis perpendicular to the display screen; the azimuth axis is used to realize the left and right rotation of the display screen. One end of the force transmission shaft 8 is connected to the azimuth axis of the universal shaft 9.

[0078] Since the transmission shaft 8 is connected to the display screen connection plate 10 through the universal shaft 9, the display screen is installed on the display screen connection plate 10. Therefore, the rotation of the display screen can be transmitted to the driving gear 2 through the display screen connection plate 10, the universal shaft 9, and the transmission shaft 8 in sequence; due to the setting of the friction component 21, when the driving gear 2 rotates, it can first drive the driven gear 4, the working gear 1, the front swing arm 5, and the rear swing arm swing 11 to swing around the axis of the transmission shaft 8.

[0079] The following takes the case where racks are vertically arranged on the mounting frames 18 on the left and right sides of the working gear 1 as an example to introduce the working principle of the horizontal and vertical screen switching mechanism of the display screen.

[0080] At this time, the horizontal and vertical screen switching mechanism of the display screen can not only be operated with one hand, but also can be operated on both the left and right sides of the display screen; when the display screen needs to be switched from horizontal to vertical; the display screen can be rotated and raised by turning the right side of the display screen downward with the right hand or by turning the left side of the display screen downward with the left hand.

[0081] If the display screen is rotated downward on the right side, the working gear 1 first swings to the left around the axis of the force transmission shaft 8 and meshes with the left rack 3. At the same time, the left limit block 14 at the lower end of the rear swing arm 11 enters the left limit slide groove 17 (at this time, the working gear 1 can no longer swing); continue to rotate the display screen, and continue to transmit the rotation action to the working gear 1. The working gear 1 overcomes the resistance of the friction component 21 and rotates around its own axis. Since the working gear 1 is meshed with the left rack 3 at this time, the working gear 1 rotates around its own axis while driving the sliding plate 7 to rise in the left slide groove 12 and the right slide groove 15, so that the display screen switches from horizontal to vertical while rising (after rising to the right position, the right side of the display screen is at the bottom).

[0082] When it is necessary to switch from the vertical screen to the horizontal screen in this state, it is only necessary to rotate the display screen in the opposite direction (rotate the lower part of the display screen upward on the right side). At this time, the working gear 1 rotates around its own axis while driving the sliding plate 7 to move downward in the left slide groove 12 and the right slide groove 15, so that the display screen switches from the vertical screen to the horizontal screen and moves downward at the same time; after moving down to the right position (that is, after completing the switching from the vertical screen to the horizontal screen), the left limit block 14 at the lower end of the rear swing arm 11 withdraws from the left limit slide groove 17, and the working gear 1 swings back to the middle position around the axis of the force transmission shaft 8.

[0083] Similarly, when the display screen is rotated downward on the left side, the working gear 1 first swings to the right around the axis of the force transmission shaft 8 and meshes with the right rack 6. At the same time, the right limit block 13 at the lower end of the rear swing arm 11 enters the right limit slot 16 (at this time, the working gear 1 can no longer swing); the display screen continues to be rotated, and the rotation action continues to be transmitted to the working gear 1. The working gear 1 overcomes the resistance of the friction component 21 and rotates around its own axis. Since the working gear 1 is meshed with the right rack 6 at this time, the working gear 1 rotates around its own axis while driving the sliding plate 7 to rise in the left slot 12 and the right slot 15, thereby realizing the switching of the display screen from horizontal to vertical while rising (after rising into place, the left side of the display screen is at the bottom).

[0084] Similarly, when the vertical screen needs to be switched to the horizontal screen in this state, it is only necessary to rotate the display screen in the opposite direction (rotate the bottom of the display screen upward on the left). At this time, the working gear 1 rotates around its own axis while driving the sliding plate 7 to move downward in the left slide groove 12 and the right slide groove 15, so that the display screen switches from the vertical screen to the horizontal screen while moving downward.

[0085] Embodiment 3:

[0086] On the basis of the above-mentioned embodiment 1 or embodiment 2, the rotating and lifting mechanism is further provided with an upward movement limit assembly, which is used for limiting the position when the display screen rotates and rises at the same time and switches from a horizontal screen to a vertical screen.

[0087] like Figure 6 and Figure 7 As shown, the upward movement limit assembly includes a limit block 201 and an upward movement limit pin 701; the limit block 201 is provided on the end surface of the driving gear 2 facing the sliding plate 7, and the end surface of the corresponding end of the sliding plate 7 is provided with an upward movement limit pin 701. When the display screen rotates from a horizontal screen to a vertical screen, the limit block 201 conflicts with the upward movement limit pin 701, and at this time, the further rotation of the driving gear 2 is limited by the upward movement limit pin 701.

[0088] As an example, the limit block 201 is set at the upper end of the vertical symmetry line of the driving gear 2 toward the end face of the sliding plate 7 (above the axis of the driving gear 2), and on the end face of the sliding plate 7, there are respectively provided with upward movement limit pins 701 on the left and right sides of its center line, which are used for limiting the position when rotating left and right and rising to the position (when the display screen can only be rotated and raised in one direction, it is only necessary to set the upward movement limit pin 701 on one side).

[0089] Embodiment 4:

[0090] On the basis of the above-mentioned embodiment 1 or embodiment 2 or embodiment 3, the rotary lifting mechanism is further provided with a downward moving prompt component to prompt the display screen to move down to the correct position (at this time, the switching from the vertical screen to the horizontal screen is completed).

[0091] like Figure 5 and Figure 6 As shown, the downward prompting assembly includes: a prompting ball 220 , a prompting ball pressing unit, and a prompting ball track groove 202 arranged on the end surface of the driving gear 2 .

[0092] A prompt ball track groove 202 is provided on the end surface of the driving gear 2 facing the sliding plate 7, and the prompt ball track groove 202 includes a spherical crown groove located on the vertical symmetry line of the driving gear 2 and located at the lower part of the end surface, and arc grooves symmetrically arranged on the left and right sides of the spherical crown groove (when the display screen can only be rotated and raised in one direction, only one side needs to be provided with an arc groove), and the arc groove is coaxial with the driving gear 2; the arc grooves on both sides are connected to the middle spherical crown groove but not connected, that is, the two are transitioned by a protrusion.

[0093] The prompt ball pressing unit is used to press the prompt ball 220 into the prompt ball track groove 202 .

[0094] When the active gear 2 rotates, the prompt ball track groove 202 and the prompt ball 220 roll together (the prompt ball 220 does not move). When the display screen moves down to the position to complete the switch from the vertical screen to the horizontal screen, the active gear 2 rotates until the spherical crown groove corresponds to the position of the prompt ball 220, that is, the prompt ball 220 passes over the protrusion from the arc groove and enters the spherical crown groove. The sound of the prompt ball 220 falling into the spherical crown groove and the resulting jamming prompts it to drop into place.

[0095] As an example, the prompt ball clamping unit includes: a spring 221 and a positioning pin 222 arranged on the mounting cylinder 20; the mounting cylinder 20 is coaxially mounted on the outside of the force transmission shaft 8 and fixedly connected to the sliding plate 7; the mounting cylinder 20 is provided with a protrusion with an inner hole for installing the spring 221 at a position corresponding to the prompt ball 220 (the protrusion passes through the sliding plate 7); the spring 221 is located in the inner hole, one end of which is in contact with the prompt ball 220, and the other end is positioned by the positioning pin 222, and the pressing force of the spring 221 on the prompt ball 220 can be adjusted by adjusting the screwing depth of the positioning pin 222.

[0096] Embodiment 5:

[0097] On the basis of the above-mentioned Embodiment 2 to Embodiment 4, further, as Figure 8 As shown, the horizontal and vertical screen switching mechanism of the display screen also includes a cable organizer 23; the cable organizer 23 is arranged on the cable organizer mounting plate, and the cable organizer mounting plate is fixedly connected to the sliding plate 7 and moves up and down following the display sliding plate 7; the display screen signal line is wound on the cable organizer 23, thereby following the display screen to rise and fall when the display screen rises and falls.

[0098] Embodiment 6:

[0099] On the basis of the above-mentioned embodiments 1 to 5, further, the horizontal and vertical screen switching mechanism of the display screen also includes a display screen load-bearing member, which is installed between the top cross bar of the mounting frame 18 and the sliding plate 7 (when there is a cable organizer 23, the lower end of the display screen load-bearing member can also be installed on the cable organizer 23); the weight of the display screen is supported by the display screen load-bearing member, and a reel of the display screen load-bearing member is provided on the top cross bar of the mounting frame 18. When the sliding plate 7 moves up and down, the display screen load-bearing member is retracted and released by the reel.

[0100] As an example, the load-bearing member of the display screen is a load-bearing spring that can be automatically retracted and extended.

[0101] As an example, two display screen load-bearing members are arranged in parallel.

[0102] Embodiment 7:

[0103] Based on the above-mentioned embodiments 1 to 6, a specific structure of the friction component 21 is given.

[0104] like Figure 5 As shown, the friction assembly 21 includes a spring plate 211 and a friction plate 222 compressed between the front swing arm 5 and the working gear 1 through a nut 210 , and a spring plate 211 and a friction plate 222 compressed between the working gear 1 and the rear swing arm 11 .

[0105] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A rotary lifting mechanism, characterized in that: include: A working gear (1), a driving gear (2), a driven gear (4), a swing arm, a rack, a force transmission shaft (8) and a sliding plate (7); The force transmission shaft (8) is a rotation input component; the force transmission shaft (8) passes through a sliding plate (7) that is slidably matched with a mounting frame (18) and is coaxially connected to the driving gear (2); The driven gear (4) is meshed with the driving gear (2); the working gear (1) is coaxially fixedly connected with the driven gear (4); The lower end of the swing arm is coaxially connected to the working gear (1) and the driven gear (4) through a friction assembly (21), and the upper end is coaxially arranged with the power transmission shaft (8); the friction assembly (21) is used to provide resistance to the rotation of the working gear (1) and the driven gear (4) around their own axes; The swing arm is used to drive the working gear (1) and the driven gear (4) to swing around the axis of the power transmission shaft (8); The mounting frame (18) is provided with a rack matched with the working gear (1), and the working gear (1) can mesh with the rack after swinging around the axis of the force transmission shaft (8) to a set angle.

2. The rotary lifting mechanism according to claim 1, characterized in that: A left rack (3) and a right rack (6) are respectively vertically arranged on the mounting frames (18) on the left and right sides of the working gear (1); When the working gear (1) swings to the left at a set angle, it can mesh with the left rack (3); when the working gear (1) swings to the right at a set angle, it can mesh with the right rack (6).

3. The rotary lifting mechanism according to claim 1 or 2, characterized in that: Also includes a limiting structure; The limiting structure includes a limiting block arranged at the lower end of the swing frame; A limiting sliding groove is provided on the mounting frame (18) at a position corresponding to the limiting block; When the working gear (1) swings and meshes with the rack, the limiting block (14) enters the corresponding limiting sliding groove and slides in cooperation with the limiting sliding groove.

4. The rotary lifting mechanism according to claim 1 or 2, characterized in that: The left and right sides of the mounting frame (18) are connected with sliding guide strips, and the sliding plate (7) is located between the sliding guide strips on both sides and is respectively slidably matched with the sliding grooves arranged on the left and right sliding guide strips.

5. The rotary lifting mechanism according to claim 1 or 2, characterized in that: It also includes an upward movement into position limit assembly; The upward movement to position limiting assembly comprises: a limiting block (210) and an upward movement to position limiting pin (701); A limit block (201) is provided on the end surface of the driving gear (2) facing the sliding plate (7), and a limit pin (701) that moves upward to a position is provided on the end surface of the corresponding end of the sliding plate (7) in the rotation direction of the driving gear (2); When the driving gear (2) rotates until the limiting block (201) thereon contacts the limiting pin (701), it indicates that the upward movement has reached the correct position.

6. The rotary lifting mechanism according to claim 1 or 2, characterized in that: Also included is a move-down prompt component; The downward movement prompting assembly comprises: a prompting ball (220), a prompting ball pressing unit, and a prompting ball track groove (202) arranged on the end surface of the driving gear (2); The end surface of the driving gear (2) facing the sliding plate (7) is provided with a prompt ball track groove (202); the prompt ball track groove (202) comprises a spherical crown groove located on the vertical symmetry line of the driving gear (2) and located at the lower part of the end surface, and an arc groove connected to the spherical crown groove, the arc groove is concentric with the driving gear (2); the arc groove and the spherical crown groove are transitioned by a protrusion; The prompt ball pressing unit is used to press the prompt ball (220) into the prompt ball track groove (2); When the driving gear (2) rotates, the prompt ball track groove (2) and the prompt ball (220) roll together, and when the driving gear (2) rotates until the spherical crown groove corresponds to the position of the prompt ball (220), the prompt ball (220) passes over the protrusion from the arc groove and enters the spherical crown groove, prompting the upward movement to the correct position.

7. The rotary lifting mechanism according to claim 6, characterized in that: The prompt ball pressing unit comprises: a spring (221) and a positioning pin (222) arranged on the mounting cylinder (20); The mounting cylinder (20) is coaxially sleeved on the outside of the force transmission shaft (8) and is fixedly connected to the sliding plate (7); The installation tube (20) is provided with a protrusion with an inner hole for installing a spring (221) at a position corresponding to the prompt ball (220); the spring (221) is located in the inner hole, one end of the spring abuts against the prompt ball (220), and the other end is positioned by a positioning pin (222); By adjusting the screwing depth of the positioning pin (222), the pressing force of the spring (221) on the prompt ball (220) can be adjusted.

8. A display screen horizontal and vertical switching mechanism, characterized in that: include: A display screen connecting plate (10) and a rotating lifting mechanism, wherein the rotating lifting mechanism is the rotating lifting mechanism according to any one of claims 1 to 7; The display screen is mounted on the display screen connecting plate (10); The display screen connecting plate (10) is connected to the force transmission shaft (8) of the rotating lifting mechanism via a universal shaft, so as to transmit the rotation of the display screen to the force transmission shaft (8); When the display screen is rotated to switch from the horizontal screen to the vertical screen, the rotating lifting mechanism automatically rises while following the rotation of the display screen; when the display screen is rotated to switch from the vertical screen to the horizontal screen, the rotating lifting mechanism automatically descends while following the rotation of the display screen.

9. The display screen horizontal and vertical switching mechanism according to claim 8, characterized in that: Also includes display screen load bearing parts; The display screen load-bearing member is installed between the top crossbar of the mounting frame (18) and the sliding plate (7); A reel of a display screen load-bearing member is arranged on the top crossbar of the mounting frame (18), and when the sliding plate (7) moves up and down, the display screen load-bearing member is retracted and released through the reel.

10. The display screen horizontal and vertical switching mechanism according to claim 8 or 9, characterized in that: It also includes a cable organizer (23); the cable organizer (23) is arranged on a cable organizer mounting plate, the cable organizer mounting plate is fixedly connected to the sliding plate (7), and moves up and down following the display sliding plate (7); the display screen signal line is wound around the cable organizer (23).

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