CN222360915U

CN222360915U - Rotating screen assembly

Info

Publication number: CN222360915U
Application number: CN202420621270.3U
Authority: CN
Inventors: 文星
Original assignee: Guangzhou Leichen Electromechanical Technology Co ltd
Current assignee: Guangzhou Leichen Electromechanical Technology Co ltd
Priority date: 2024-03-27
Filing date: 2024-03-27
Publication date: 2025-01-17
Anticipated expiration: 2034-03-27

Abstract

The application discloses a rotary screen assembly which comprises a display screen, a driving mechanism and a rotation detection mechanism, wherein the display screen can rotate along a rotation axis, two ends of the display screen are respectively provided with a driving end and a driven end in the direction of the rotation axis, the driving mechanism is connected with the driving end and is used for driving the display screen to rotate, and the rotation detection mechanism is connected with the driven end and is used for detecting the rotation angle of the display screen. According to the scheme, the driving mechanism and the rotation detection mechanism are respectively connected to the two ends of the display screen, so that the driving mode of the display screen is single-side driving, and compared with the traditional double-side driving mode, the problem of unbalanced rotation stress of the screen caused by asynchronous double-side driving is solved, and meanwhile, the cost is reduced. The rotation detection mechanism can measure the rotation angle of the display screen so as to ensure the accurate control of the rotation position of the display screen.

Description

Rotary screen assembly

Technical Field

The application relates to the technical field of display screen rotation detection, in particular to a rotary screen assembly.

Background

Nowadays, more and more automobiles are equipped with vehicle-mounted motion screens which are generally arranged at the roof positions, so that secondary driving and rear passengers can enjoy video and audio experiences during driving, because of the limitation of the space in the automobile, such a display generally requires folding it to a position parallel to the roof of the vehicle when not in use, while the actuator for turning the screen requires a set of power drive system, while also having the function of stopping the screen in any position within a certain angular range.

The existing power driving system of the vehicle-mounted moving screen in the current market adopts a double-motor scheme, namely, two sides of the display screen are respectively provided with a set of motors, driven shafts of the two sets of motors are connected and fixed with the display screen at the same time, and when the moving screen needs to be unfolded or folded, the two motors work synchronously and drive the moving screen to rotate together.

The driving system has several disadvantages, firstly, the requirement of double motors on electric control technology is high, the motors at two ends are difficult to realize completely synchronous motion, thus the rotation stress of a screen is unbalanced, and finally, the problems of noise, vibration and short service life are caused. The second is that the cost requirement of the double-motor scheme is that not only the two motors are high in cost, but also the same two sets of reduction gear mechanisms are needed, and the cost is increased. And the rotation angle of the display screen is difficult to control due to the lack of a detection mechanism for the rotation angle of the display screen.

Disclosure of utility model

The application provides a rotary screen assembly, which solves the problem that the synchronous operation is difficult to complete during the driving of double motors and the problem that the rotation angle of a rotary screen is difficult to control.

In order to solve the technical problems, the technical scheme provided by the application is as follows:

The rotating screen assembly comprises a display screen, a driving mechanism and a rotation detection mechanism, wherein the display screen can rotate along a rotation axis, a driving end and a driven end are respectively arranged at two ends of the display screen in the direction of the rotation axis, the driving mechanism is connected with the driving end and is used for driving the display screen to rotate, the rotation detection mechanism is connected with the driven end and is used for detecting the rotation angle of the display screen, the rotating screen assembly comprises a connecting frame part and a detection part, the connecting frame part comprises a first attaching part and a first bending part, the first attaching part is used for attaching and fixing the display screen, the first bending part bends towards the direction far away from the display screen relative to the first attaching part in the direction perpendicular to the rotation axis, and the detection part is connected with the first bending part so that the orthographic projection of the detection part on the display screen is at least partially overlapped with the display screen.

The beneficial effects of the application are as follows:

According to the rotating screen assembly, the driving mechanism and the rotation detection mechanism are respectively connected to the two ends of the display screen, so that the driving mode of the display screen is single-side driving, compared with the traditional double-side driving mode, the problem that the rotation stress of the display screen is unbalanced due to the fact that double-side driving is asynchronous is solved, the problems of noise, vibration and short service life due to the fact that the rotation stress of the display screen is unbalanced are solved, meanwhile, the driving structure of one side is reduced, and cost is reduced. Meanwhile, the rotation detection mechanism is arranged at the driven end of the display screen along the rotation axis of the display screen, so that the rotation angle of the display screen can be measured, and the accurate control of the rotation position of the display screen is ensured. In addition, the rotation detection mechanism comprises a connecting frame part and a detection part, the detection part is connected to the display screen through the connecting frame part, the orthographic projection of the detection part on the display screen is at least partially overlapped with the display screen, the axial size of the integral structure formed by the display screen and the rotation detection mechanism can be reduced, and the integral axial size of the rotation screen assembly is further reduced.

According to one embodiment of the application, the driving mechanism comprises a mounting frame part and a driving part, the mounting frame part comprises a second attaching part and a second bending part, the second attaching part is used for attaching and fixing the display screen, the second bending part bends towards the direction far away from the display screen relative to the second attaching part in the direction perpendicular to the rotation axis, and the driving part is connected with the second bending part, so that the orthographic projection of the driving part on the display screen is at least partially overlapped with the display screen.

In the scheme, the driving mechanism comprises the mounting frame part and the driving part, the driving part is connected to the display screen through the mounting frame part, the orthographic projection of the driving part on the display screen is at least partially overlapped with the display screen, the axial size of the integral structure formed by the display screen and the driving mechanism can be reduced, and the integral axial size of the rotating screen assembly is further reduced.

According to an embodiment of the application, the drive mechanism and the rotation detection mechanism are located on the same side of the display screen in a direction perpendicular to the rotation axis.

In this scheme, can both drive mechanism and rotation detection mechanism hide in the back of display screen.

According to one embodiment of the application, the first attaching part and the second attaching part are respectively provided with a fixing hole, and the fixing holes are penetrated through by the fasteners and connected to the display screen so as to realize the connection and fixation between the first attaching part and the display screen and the connection and fixation between the second attaching part and the display screen.

In this scheme, realize first laminating portion and display screen through fastener and fixed orifices complex form to and come between second laminating portion and the display screen to condense fixedly, connected mode is simple reliable.

According to one embodiment of the application, the driving mechanism comprises a driving end shell, a driving shaft, a motor and a gear reduction mechanism, wherein the driving end shell is used for being fixedly connected to a fixed member, the gear reduction mechanism is positioned in the driving end shell, the motor is positioned outside the driving end shell, an output shaft of the motor stretches into the driving end shell and is connected with a power input end of the gear reduction mechanism, one end of the driving shaft stretches into the driving end shell and is connected with a power output end of the gear reduction mechanism, the other end of the driving shaft is fixedly connected with a second bending part, and a central axis of the driving shaft coincides with a rotation axis.

In this scheme, the power of motor is transmitted to the drive shaft after the speed reduction of gear reduction mechanism, and the drive shaft rotates the time through the mounting bracket part fixed with the drive shaft drive display screen rotation.

According to one embodiment of the application, the rotation detection mechanism comprises a driven end shell, a driven shaft, a magnet and a magnetic sensitive element, wherein the driven end shell is fixedly connected to a fixed component, one end of the driven shaft extends into the driven end shell and is rotationally connected to the driven end shell, the other end of the driven shaft is fixedly connected with a first bending part, the central axis of the driven shaft coincides with the rotation axis, the magnet is positioned in the driven end shell, the magnet is connected with the driven shaft to rotate along with the rotation of the driven shaft, the magnet comprises at least one pair of poles magnetized in the radial direction, the magnetic sensitive element is fixed in the driven end shell, the magnetic sensitive element is positioned on the central axis of the magnet, and the magnetic sensitive element and the magnet are arranged at intervals.

In this scheme, set up the magneto-sensitive element on the central axis of magnet and both interval settings, when actuating mechanism drove the display screen rotation, the display screen can drive driven shaft synchronous revolution, can drive the magnet rotation when the driven shaft is rotatory to detect the rotation angle of magnet through the magneto-sensitive element when the magnet is rotatory, and then can obtain the rotation angle of driven shaft and display screen. The magnet is used for generating magnetic induction lines, the magnetic sensitive element is used for detecting the rotation position (namely the rotation angle) of the magnet according to the magnetic induction lines, and since the magnet comprises at least one pair of poles magnetized in the radial direction and the magnetic sensitive element is positioned on the central axis of the magnet, when the magnet rotates, the magnetic sensitive element can respond to the change of the direction of the magnetic induction lines of the magnet so as to realize the detection of the rotation position of the magnet, and the rotation of the magnet is driven by the rotation of the driven shaft, so that the rotation position of the magnet can be indirectly detected by detecting the rotation position of the display screen. According to the scheme, the rotation position of the magnet can be detected through the direction change of the magnetic induction line of the magnetic induction element induction magnet, and the detection result is more accurate.

According to the embodiment of the application, the rotation detection mechanism further comprises a first gear and a second gear, wherein the first gear is positioned in the driven end shell and fixedly sleeved on the driven shaft, the second gear is positioned in the driven end shell and is coaxially and fixedly connected with the magnet, and the second gear is meshed with the outer side of the first gear.

In the scheme, the magnet can be arranged on the radial outer side of the driven shaft through the power transmission of the first gear and the second gear, so that the axial size of the rotation detection mechanism is reduced, and the integral axial size of the rotary screen assembly can be reduced.

According to an embodiment of the application, the drive mechanism further comprises a first damping assembly for effecting damped rotation of the driven shaft relative to the driven end housing, and/or the rotation detection mechanism further comprises a second damping assembly for effecting damped rotation of the drive shaft relative to the drive end housing.

In this scheme, first damping subassembly and second damping subassembly can let the motion display screen have buffering and fixed action when the upset, and the display screen can hover on optional position.

According to one embodiment of the application, the first damping assembly comprises a first damping friction plate group and a first damping fixing seat, the first damping fixing seat is used for being fixedly connected with the driven end shell, the first damping friction plate group comprises at least one first fixed friction plate and at least one first rotating friction plate which are in friction connection, the first fixed friction plate and the first rotating friction plate are coaxially sleeved on the driven shaft, the first fixed friction plate is fixed on the first damping fixing seat, the first rotating friction plate is fixed on the driven shaft so that the first rotating friction plate rotates relatively to the first fixed friction plate when rotating along with the driven shaft, and/or the second damping assembly comprises a second damping friction plate group and a second damping fixing seat, the second damping fixing seat is used for being fixedly connected with the driving end shell, the second damping friction plate group comprises at least one second fixed friction plate and at least one second rotating friction plate which are in friction connection, the second fixed friction plate and the second rotating friction plate are coaxially sleeved on the driving shaft, the second fixed on the second damping fixing seat, and the second rotating friction plate is fixed on the driving shaft so that the second rotating along with the driving shaft rotates relatively to the second fixed friction plate.

According to one embodiment of the application, the rotation detection mechanism further comprises a first rotation limiting mechanism, the first rotation limiting mechanism comprises a first blocking protrusion and a first rotating piece, the first blocking protrusion is fixed on the first damping fixing seat, the first rotating piece is fixed on the first bending part so as to be blocked by the first blocking protrusion when the first rotating piece rotates to the limit position along with the driven shaft, and/or the driving mechanism further comprises a second rotation limiting mechanism, the second rotation limiting mechanism comprises a second blocking protrusion and a second rotating piece, the second blocking protrusion is fixed on the second damping fixing seat, and the second rotating piece is fixed on the second bending part so as to be blocked by the second blocking protrusion when the second rotating piece rotates to the limit position along with the driven shaft.

In this scheme, can be through the first protruding that keeps off under the state of first rotary piece along with driven shaft rotation to extreme position to and the second rotary piece can be kept off protruding by the second under the state of the rotatory extreme position along with the drive shaft to limit the rotatory extreme position of display screen.

Drawings

For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic front view of an embodiment of a rotary screen assembly provided by the present application;

FIG. 2 is a schematic perspective view of an embodiment of a rotary screen assembly provided by the present application;

FIG. 3 is a schematic perspective view of a rotation detection mechanism in the rotary screen assembly of FIGS. 1 and 2;

FIG. 4 is a schematic perspective view of a drive mechanism in the rotary screen assembly of FIGS. 1 and 2;

FIG. 5 is a schematic perspective view of the internal structure of the drive mechanism of FIG. 4;

FIG. 6 is a perspective view of the internal structure of the rotation detection mechanism of FIG. 3;

FIG. 7 is a schematic cross-sectional view of the sensing portion of the rotation sensing mechanism of FIG. 3 along the rotational axis R ₁;

FIG. 8 is an enlarged view within the dashed box of FIG. 7;

Fig. 9 is a schematic diagram of the structure of the magnet and the magneto-sensitive element of fig. 8.

Reference numerals illustrate:

display screen 100

Drive end 101

Driven end 102

Rotation detection mechanism 200

Detection section 201

Connector portion 202

First bonding portion 2021

First fixing hole 2021a

First bending part 2022

Magnet 2101

Magneto-sensitive element 2102

Gap 2103

Driven shaft 211

Driven end bearing 2110

First gear 212

Second gear 213

PCB 214

Encoder fixing base 215

First positioning sleeve 216

Second positioning sleeve 217

Third positioning sleeve 218

Positioning column 219

Fourth positioning sleeve 220

Driven end housing 221

Driven cover 222

Driven cover 223

First damping friction plate set 281

First damping fixing seat 282

First baffle projection 291

First rotating plate 292

Driving mechanism 300

A driving part 301

Mount portion 302

Second bonding portion 3021

Second fixing hole 3021a

Second bending part 3022

Drive shaft 3001

Drive end bearing 3002

Motor 310

Drive end housing 320

Driving base 321

Drive housing 322

Shock pad 323

Drive shaft 330

Worm 331

Worm gear 332

First stage pinion 333

First gear shaft 334

Second duplex tooth 341

Second gear shaft 342

Third duplex tooth 351

Third gear shaft 352

Fourth double teeth 361

Fourth gear shaft 362

Fifth stage bull gear 371

Second damping friction plate group 381

Second damping fixing seat 382

Second baffle protrusion 391

Second rotary piece 392

Fixing member 400

The rotation axis R ₁

Central axis R ₂₁

Central axis R ₂₂

Central axis R ₃₁

Central axis R ₃₂

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

According to the embodiment of the application, the driving end of the vehicle-mounted motion screen along the rotation axis is connected with the driving mechanism for driving the display screen to rotate, so that the embodiment of the application cancels the driving structure at one side of the double-side driving structure, namely only the single-side driving structure is arranged, the problem of unbalanced rotation stress of the screen caused by asynchronous double-side driving is solved, the problems of noise, vibration and short service life caused by unbalanced rotation of the display screen in hands are solved, and meanwhile, the driving structure at one side is reduced, so that the cost is also reduced. Meanwhile, the driven end of the vehicle-mounted motion screen along the rotation axis is provided with a rotation detection mechanism, so that the rotation angle of the vehicle-mounted motion screen can be measured, and the accurate control of the rotation position of the vehicle-mounted motion screen is ensured.

Referring to fig. 1 and 2, fig. 1 is a schematic front view of an embodiment of a rotary screen assembly according to the present application, and fig. 2 is a schematic perspective view of an embodiment of a rotary screen assembly according to the present application. In this embodiment, the rotary screen assembly includes a display screen 100, a driving mechanism 300, and a rotation detection mechanism 200. By way of example, the display screen 100 may be an in-vehicle motion screen or other screen that is rotatable and has a display function.

The display 100 is rotatable along a rotation axis R ₁, and in the direction of the rotation axis R ₁, two ends of the display 100 are a driving end 101 and a driven end 102, respectively. The driving mechanism 300 is connected to the driving end 101 for driving the display 100 to rotate. The rotation detecting mechanism 200 is connected to the driven end 102, and is used for detecting a rotation angle of the display screen 100.

Referring to fig. 3, fig. 3 is a schematic perspective view of a rotation detecting mechanism in the rotary screen assembly of fig. 1 and 2. The rotation detecting mechanism 200 includes a connecting frame portion 202 and a detecting portion 201, the connecting frame portion 202 includes a first attaching portion 2021 and a first bending portion 2022, and referring to fig. 1 and 2, the first attaching portion 2021 is used for attaching and fixing the display screen 100, the first bending portion 2022 is bent relative to the first attaching portion 2021 in a direction perpendicular to the rotation axis R ₁ and away from the display screen 100, and the detecting portion 201 is connected to the first bending portion 2022, so that an orthographic projection of the detecting portion 201 on the display screen 100 at least partially coincides with the display screen 100.

It can be seen that, in the rotating screen assembly provided by the application, the driving mechanism 300 and the rotation detecting mechanism 200 are respectively connected to two ends of the display screen 100, so that the driving mode of the display screen 100 is single-side driving, compared with the traditional double-side driving mode, the problem of unbalanced rotation stress of the display screen 100 caused by unsynchronized double-side driving is solved, the problems of noise, vibration and short service life caused by unbalanced rotation stress of the display screen 100 are solved, and meanwhile, the cost is reduced due to the reduction of the driving structure of one side. Meanwhile, the driven end 102 on the display screen 100 along the rotation axis R ₁ is provided with the rotation detection mechanism 200, so that the rotation angle of the display screen 100 can be measured, and the accurate control of the rotation position of the display screen 100 is ensured. In addition, the rotation detecting mechanism 200 includes the connection frame portion 202 and the detecting portion 201, the detecting portion 201 is connected to the display screen 100 through the connection frame portion 202, the orthographic projection of the detecting portion 201 on the display screen 100 is at least partially overlapped with the display screen 100, the axial dimension of the integral structure formed by the display screen 100 and the rotation detecting mechanism 200 can be reduced, and the integral axial dimension of the rotation screen assembly of the present application can be further reduced.

The foregoing that the front projection of the detecting portion 201 on the display screen 100 at least partially coincides with the display screen 100 means that the front projection of the detecting portion 201 on the display screen 100 partially or completely coincides with the display screen 100, and further, the front projection of the rotation detecting mechanism 200 on the display screen 100 partially or completely coincides with the display screen 100. In order to further reduce the axial dimension of the overall structure formed by the display screen 100 and the rotation detecting mechanism 200, the portion of the rotation detecting mechanism 200 located on the outer side of the display screen 100 along the direction of the rotation axis R ₁ may be reduced as much as possible, preferably, the front projection of the rotation detecting mechanism 200 on the display screen 100 is fully overlapped with the display screen 100, so that the rotation detecting mechanism 200 is prevented from protruding out of the display screen 100 along the direction of the rotation axis R ₁, that is, the axial dimension of the overall structure formed by the display screen 100 and the rotation detecting mechanism 200 is the axial dimension of the display screen 100 itself.

Referring to fig. 4, fig. 4 is a schematic perspective view of a driving mechanism in the rotary screen assembly of fig. 1 and 2. In this embodiment, the driving mechanism 300 includes a mounting frame portion 302 and a driving portion 301, the mounting frame portion 302 includes a second attaching portion 3021 and a second bending portion 3022, the second attaching portion 3021 is used for attaching and fixing the display screen 100, the second bending portion 3022 is bent relative to the second attaching portion 3021 in a direction perpendicular to the rotation axis R ₁ and away from the display screen 100, and the driving portion 301 is connected to the second bending portion 3022, so that a front projection of the driving portion 301 on the display screen 100 at least partially coincides with the display screen 100. In this embodiment, the axial dimension of the integral structure formed by the display screen 100 and the driving mechanism 300 can be reduced, and the overall axial dimension of the rotary screen assembly of the present application can be further reduced.

The foregoing that the front projection of the driving portion 301 on the display screen 100 at least partially coincides with the display screen 100 means that the front projection of the driving portion 301 on the display screen 100 partially or completely coincides with the display screen 100, and further that the front projection of the driving mechanism 300 on the display screen 100 partially or completely coincides with the display screen 100. In order to further reduce the axial dimension of the overall structure formed by the display screen 100 and the rotation driving mechanism 300, the portion of the driving mechanism 300 located on the outer side of the display screen 100 along the direction of the rotation axis R ₁ may be reduced as much as possible, preferably, the front projection of the driving mechanism 300 on the display screen 100 is completely overlapped with the display screen 100, so that the driving mechanism 300 is prevented from protruding out of the display screen 100 along the direction of the rotation axis R ₁, that is, the axial dimension of the overall structure formed by the display screen 100 and the driving mechanism 300 is the axial dimension of the display screen 100 itself.

It should be noted that, the display 100 generally includes a front surface and a back surface, the front surface is a display surface, the first bonding portion 2021 and the second bonding portion 3021 may be fixed on the back surface of the display 100, so as to avoid affecting the display effect of the front surface of the display 100, and certainly, the case that the first bonding portion 2021 and the second bonding portion 3021 are fixed on the front surface of the display 100 is not excluded.

Referring to fig. 1 and 2 again, in the present embodiment, the driving mechanism 300 and the rotation detecting mechanism 200 are located on the same side of the display 100 in the direction perpendicular to the rotation axis R ₁, so that both the driving mechanism 300 and the rotation detecting mechanism 200 can be hidden behind the display 100.

Referring to fig. 3 and 4 again, in the present embodiment, fixing holes are formed on the first attaching portion 2021 and the second attaching portion 3021, and fasteners are inserted through the fixing holes and connected to the display screen 100 to achieve connection fixing between the first attaching portion 2021 and the display screen 100, and connection fixing between the second attaching portion 3021 and the display screen 100. The fastener may be a screw or bolt, etc. The fixing hole in the first bonding portion 2021 is a first fixing hole 2021a, and the fixing hole in the second bonding portion 3021 is a second fixing hole 3021a. In this embodiment, the first attaching portion 2021 and the display screen 100, and the second attaching portion 3021 and the display screen 100 are connected and fixed by the form of matching the fastening member with the fixing hole, and the connection manner is simple and reliable. In other embodiments, the first bonding portion 2021 and the second bonding portion 3021 may be fixed to the display screen 100 by other methods such as bonding or welding.

Referring to fig. 5, fig. 5 is a schematic perspective view illustrating an internal structure of the driving mechanism of fig. 4. Referring also to fig. 4, in the present embodiment, the driving portion 301 of the driving mechanism 300 includes a driving end housing 320, a driving shaft 3001, a motor 310, and a gear reduction mechanism, and the driving end housing 320 is fixedly connected to a fixing member 400, and the fixing member 400 may be an automobile chassis, for example. The gear reduction mechanism is located in the driving end shell 320, the motor 310 is located outside the driving end shell 320, an output shaft of the motor 310 stretches into the driving end shell 320 and is connected with a power input end of the gear reduction mechanism, one end of the driving shaft 3001 stretches into the driving end shell 320 and is connected with a power output end of the gear reduction mechanism, the other end of the driving shaft 3001 is fixedly connected with the second bending part 3022, and a central axis R ₃₁ of the driving shaft 3001 coincides with the rotation axis R ₁. In this embodiment, the output shaft of the motor 310 is decelerated by the gear reduction mechanism to rotate the driving shaft 3001, so that the driving shaft 3001 rotates to drive the display screen 100 through the mounting frame portion 302 fixed to the driving shaft 3001.

The drive end housing 320 may be connected to the fixing member 400 by a fastener such as a bolt, and in order to reduce the shock effect between the drive end housing 320 and the fixing member 400 when the motor 310 is operated, a shock pad 323 is provided between the drive end housing 320 and the fixing member 400. In order to facilitate the installation of the components in the driving end housing 320, the driving end housing 320 includes a detachable driving base 321 and a driving cover 322, and the driving base 321 and the driving cover 322 may be installed by using screws.

The gear reduction mechanism comprises a first-stage reduction mechanism, a second-stage reduction mechanism, a third-stage reduction mechanism, a fourth-stage reduction mechanism and a fifth-stage reduction mechanism.

The first-stage reduction mechanism comprises a worm 331 and first duplex teeth, the first duplex teeth comprise a worm wheel 332 and a first-stage pinion 333, the first duplex teeth are rotationally connected in the driving end shell 320 (particularly, the driving base 321) through a first gear shaft 334, an output shaft of the motor 310 penetrates into the driving end shell 320 and then is coaxially and fixedly connected with the worm 331, and the first reduction is realized through the engagement of the worm 331 and the worm wheel 332.

The second-stage reduction mechanism comprises a second duplex gear 341, the second duplex gear 341 comprises a second-stage large gear and a second-stage small gear, the second duplex gear 341 is rotatably connected in the driving end shell 320 (specifically, the driving base 321) through a second gear shaft 342, and the first-stage small gear 333 of the first-stage reduction mechanism is meshed with the second-stage large gear of the second-stage reduction mechanism to realize second reduction.

The third-stage reduction mechanism comprises a third duplex gear 351, the third duplex gear 351 comprises a third-stage big gear and a third-stage small gear, the third duplex gear 351 is rotationally connected in the driving end shell 320 (particularly, the driving base 321) through a third gear shaft 352, and the second-stage small gear of the second-stage reduction mechanism is meshed with the third-stage big gear of the third-stage reduction mechanism, so that third reduction is realized.

The fourth-stage reduction mechanism includes a fourth double-toothed gear 361, the fourth double-toothed gear 361 includes a fourth-stage large gear and a fourth-stage small gear, and the fourth double-toothed gear 361 is rotatably connected in the drive end housing 320 (specifically, the drive base 321) through a fourth gear shaft 362, and the engagement between the third-stage small gear of the third-stage reduction mechanism and the fourth-stage large gear of the fourth-stage reduction mechanism realizes fourth reduction.

The fifth-stage reduction mechanism comprises a fifth-stage large gear 371, the fifth-stage large gear 371 is coaxially and fixedly sleeved on the driving shaft 3001, and through engagement between a fourth-stage small gear of the fourth-stage reduction mechanism and the fifth-stage large gear 371 of the fifth-stage reduction mechanism, fifth-stage reduction is realized, and finally torque and rotation speed are output by the driving shaft 3001.

In this embodiment, the rotation speed output by the motor 310 is output to the driving shaft 3001 after five-stage deceleration to achieve the required rotation speed of the driving shaft 3001, and in other embodiments, other deceleration mechanisms may be used, but the deceleration mechanism is at least one-stage deceleration mechanism.

And the end of the driving shaft 3001, which is far away from the display screen 100 in the direction of the rotation axis R ₁, is sleeved with a driving end bearing 3002, the driving shaft 3001 is supported on the driving end housing 320 through the driving end bearing 3002, and the driving end bearing 3002 may be an oil-containing bushing.

As can be seen from fig. 1 and 2, since the space (particularly the dimension along the rotation axis R ₁) for mounting the display screen 100, the driving mechanism 300, and the rotation detecting mechanism 200 by the fixing member 400 is limited, the present embodiment disposes the motor 310 outside the driving shaft 3001 in the direction perpendicular to the rotation axis R ₁ such that the central axis R ₃₂ of the output shaft of the motor 310 is perpendicular to the rotation axis R ₁, and the gear reduction mechanism is located between the driving shaft 3001 and the motor 310 in the direction perpendicular to the rotation axis R ₁ to reduce the dimension of the driving mechanism 300 in the direction along the rotation axis R ₁.

Referring to fig. 6, fig. 6 is a schematic perspective view showing the internal structure of the rotation detecting mechanism of fig. 3, and in combination with fig. 3 and 6, the detecting portion 201 of the rotation detecting mechanism 200 in this embodiment includes a driven end housing 221, a driven shaft 211, a magnet and a magneto-sensitive element.

The driven end housing 221 is for fixed connection to the fixing member 400, and the driven end housing 221 may be fixed connected to the fixing member 400 by a fastener such as a bolt. In order to facilitate the installation of various parts in the driven end housing 221, the driven end housing 221 comprises a driven cover body 223 and a driven cover body 222 which are detachably connected, one end face of the driven cover body 222 is opened, and the driven cover body 223 is covered at the opening to realize the disassembly and assembly of the driven end housing 221. In order to reduce the shock effect between the driven end housing 221 and the fixing member 400, a shock pad may also be provided between the driving end housing 320 and the fixing member 400.

Referring to fig. 7 and 8, fig. 7 is a schematic cross-sectional view of a detecting portion of the rotation detecting mechanism of fig. 3 along a rotation axis R ₁, fig. 8 is an enlarged view within a dashed frame of fig. 7, one end of the driven shaft 211 penetrates the driven end housing 221 and is rotatably connected to the driven end housing 221, the other end is fixedly connected to the first bending portion 2022, and a central axis R ₂₁ of the driven shaft 211 coincides with the rotation axis R ₁. The driven shaft 211 is sleeved with a driven end bearing 2110 at the part extending into the driven end shell 221, the driven shaft 211 is supported in the driven end shell 221 through the driven end bearing 2110, and the driven end bearing 2110 can adopt an oil-containing bushing.

A magnet 2101 is located within the driven end housing 221, the magnet 2101 being coupled to the driven shaft 211 for rotation with rotation of the driven shaft 211, the magnet 2101 comprising at least one pair of poles that are radially magnetized. The magnetic sensor 2102 is fixed in the driven end housing 221, the magnetic sensor 2102 is located on the central axis R ₂₂ of the magnet 2101, and the magnetic sensor 2102 is arranged at intervals with the magnet 2101.

In this embodiment, when the driving mechanism 300 drives the display screen 100 to rotate, the display screen 100 drives the driven shaft 211 to rotate synchronously, and when the driven shaft 211 rotates, the magnet 2101 is driven to rotate, so that the rotation angle of the magnet 2101 is detected by the magneto-sensitive element 2102 when the magnet 2101 rotates, and the rotation angles of the driven shaft 211 and the display screen 100 can be obtained. The specific principle of the detection is that the magnet 2101 is used for generating magnetic induction lines, the magnetic sensor 2102 is used for detecting the rotation position (namely the rotation angle) of the magnet 2101 according to the magnetic induction lines, and since the magnet 2101 comprises at least one pair of poles magnetized in the radial direction and the magnetic sensor 2102 is located on the central axis R ₂₂ of the magnet 2101, when the magnet 2101 rotates, the magnetic sensor 2102 can respond to the change of the magnetic induction lines of the magnet 2101 to detect the rotation position of the magnet 2101, and the rotation of the magnet 2101 is driven by the rotation of the driven shaft 211, so that the rotation position of the magnet 2101 can be indirectly detected. In this embodiment, the rotation position of the magnet 2101 can be detected by sensing the change of the direction of the magnetic induction line of the magnet 2101 by the magnetic sensor 2102, and the detection result is more accurate.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a magnet 2101 and a magneto-sensitive element 2102, wherein the magnet 2101 is in a flat cylindrical shape, the magnet 2101 is a pair of polar radial magnetizing magnets, and the magneto-sensitive element 2102 is preferably a magnetic Induction Chip (IC), and an MT6835 type chip is an exemplary optional chip, and the chip is an angular encoder chip based on anisotropic magneto-resistance (AMR) technology. The magnetic sensor 2102 is responsive to a change in direction of a magnetic field parallel to its surface, so that the magnetic sensor 2102 can detect the angular position of the magnet 2101 when the magnet 2101 rotates.

The diameter (Dmag) of the magnet 2101 is 4-16mm, preferably 10mm, the thickness (Tmag) of the magnet 2101 is 1-4mm, preferably 2.5mm, the driving magnetic field (Bpk) of the magnet 2101 is 30-1000mT, wherein the driving magnetic field is parallel to the horizontal direction of the surface of the magnetic sensor 2102 and measured on the surface of the magnetic sensor 2102, the Rotation Speed (RS) of the magnet 2101 is 120000RPM (revolutions per minute) at maximum, the temperature coefficient (TCmag) of the magnet 2101, the neodymium-iron-boron magnet is preferably-0.12%/° C, and the samarium-cobalt magnet is preferably-0.035%/° C.

The gap (AG) 2103 between the magnet 2101 and the magnetic sensor 2102 is 1-3mm, preferably 1mm, and maximum is 3mm, the gap 2103 should be as small as possible to obtain the best detection performance, the magnetic field is weakened when the gap 2103 is large to deteriorate the detection performance, the central axis of the magnet 2101 and the induction center of the magnetic sensor 2102 should be aligned, and the eccentricity (DISP) of the two should not exceed 0.3mm, and the eccentricity is avoided as much as possible when the magnetic sensor is installed. The deterioration in detection performance caused by the larger eccentricity and larger gap 2103 is more pronounced for smaller diameter magnets.

With continued reference to fig. 6 to 8, in the present embodiment, the detecting portion 201 of the rotation detecting mechanism 200 further includes a first gear 212 and a second gear 213, the first gear 212 is located in the driven end housing 221 and is fixedly sleeved on the driven shaft 211, the second gear 213 is located in the driven end housing 221 and is fixedly connected with the magnet 2101 coaxially, and the second gear 213 is meshed with the outer side of the first gear 212. The driven end housing 221 can enclose the magnet 2101, the magnetic sensor 2102, the first gear 212, and the second gear 213 from being exposed. In this embodiment, when the driven shaft 211 rotates with the display screen 100, the first gear 212 fixed on the driven shaft 211 is driven to rotate synchronously, and the engagement of the first gear 212 and the second gear 213 drives the second gear 213 to rotate, so as to drive the magnet 2101 coaxially fixed with the second gear 213 to rotate, in this embodiment, the second gear 213, the magnet 2101 and the magneto-sensitive element 2102 are disposed on the radial outer side of the driven shaft 211, and the central axis R ₂₂ of the magnet 2101 is parallel to the rotation axis R ₁, so that the size of the rotation detection mechanism 200 itself on the rotation axis R ₁ can be reduced, and thus the overall axial size of the rotation screen assembly of the present application can be reduced.

In this embodiment, the second gear 213 directly engages the first gear 212, and in other embodiments, a plurality of intermediate gears may be engaged between the second gear 213 and the first gear 212.

In the present embodiment, the transmission ratio of the first gear 212 to the second gear 213 is 1, specifically, the diameters of the first gear 212 and the second gear 213 are the same. The first gear 212 and the second gear 213 are in equal ratio transmission, the rotation speed of the second gear 213 is the rotation speed of the first gear 212, that is, the rotation angle of the magnet 2101 on the second gear 213 is measured, that is, the rotation angle of the driven shaft 211 and the display screen 100 is measured, and the detection process is simpler and more effective. In other embodiments, the first gear 212 and the second gear 213 may also adopt unequal ratio transmission, that is, the diameters of the gears of the first gear 212 and the second gear 213 may also be different, and when the first gear 212 rotates to drive the second gear 213 to increase or decrease, that is, when the display 100 rotates by an angle, the corresponding rotation angle of the magnet 2101 is greater than or less than the rotation angle of the display 100, and the actual rotation angle of the display 100 needs to be converted according to the ratio of the diameters of the gears of the first gear 212 and the second gear 213.

Further, in order to realize the installation and fixation of the magneto-sensitive element 2102 in the driven end housing 221, the rotation detection mechanism 200 of the present embodiment further includes an encoder fixing base 215, a first positioning sleeve 216, and a PCB board 214, wherein the first positioning sleeve 216 is fixed to an inner wall of the driven end housing 221, specifically, the first positioning sleeve 216 is fixed to an inner wall of the cover 223. The encoder fixing base 215 is fixed on the first positioning sleeve 216 and defines a cavity together with the first positioning sleeve 216, the PCB 214 is positioned in the cavity and fixed on the encoder fixing base 215, the encoder fixing base 215 is provided with a through hole, the magneto-sensitive element 2102 is fixed on the PCB 214, and is exposed to the through hole and is opposite to the magnet 2101 to sense a magnetic induction line generated by the magnet 2101. Since the magnetic sensor 2102 is usually pre-mounted on the PCB 214, positioning of the PCB 214 within the first positioning sleeve 216 achieves positioning of the magnetic sensor 2102 within the driven end housing 221.

To facilitate positioning of the magnet 2101 on the second gear 213, the end face of the second gear 213 facing the magneto-sensitive element 2102 in this embodiment is provided with a second positioning sleeve 217, and the magnet 2101 is positioned within the second positioning sleeve 217.

In order to facilitate the installation of the second gear 213 in the driven end housing 221, the encoder fixing base 215 is provided with a third positioning sleeve 218 at the through hole, the magneto-sensitive element 2102 is located on the central axis of the third positioning sleeve 218, and the second positioning sleeve 217 is coaxially sleeved with the third positioning sleeve 218. The driven end housing 221 is further provided with a fourth positioning sleeve 220, specifically, the fourth positioning sleeve 220 is fixed on the inner wall of the cover 222, the end surface of the second gear 213, which faces away from the first positioning sleeve 216, is coaxially and fixedly connected with a positioning column 219, and the positioning column 219 is positioned on the fourth positioning sleeve 220 and can rotate relative to the fourth positioning sleeve 220. Therefore, one side of the second gear 213 along the axial direction thereof is in rotary fit with the second positioning sleeve 217 and the third positioning sleeve 218, and the other side is in rotary fit with the fourth positioning sleeve 220 through the positioning column 219, so that the two ends of the second gear 213 are supported, and the rotation of the second gear 213 relative to the driven end housing 221 is realized. Meanwhile, after the PCB 214 is mounted on the first positioning sleeve 216, the magnetic sensor 2102 is located on the central axis of the third positioning sleeve 218, after the magnet 2101 is mounted in the second positioning sleeve 217, the magnet 2101 is located on the central axis of the second positioning sleeve 217, and the second positioning sleeve 217 is coaxially sleeved with the third positioning sleeve 218, so that when the second positioning sleeve 217 is coaxially sleeved with the third positioning sleeve 218, the magnetic sensor 2102 is automatically aligned with the central axis of the magnet 2101.

Referring again to fig. 3 and 4, in the present embodiment, the rotation detection mechanism 200 further includes a first damping assembly for effecting damped rotation of the driven shaft 211 relative to the driven end housing 221, and/or the drive mechanism 300 further includes a second damping assembly for effecting damped rotation of the drive shaft 3001 relative to the drive end housing 320. In this embodiment, the first damping component and the second damping component can make the motion display screen 100 have buffering and fixing effects when turning over, and the display screen 100 can hover at any position.

Specifically, the first damping assembly includes a first damping friction plate set 281 and a first damping fixing base 282, the first damping fixing base 282 is used for being fixedly connected with the driven end housing 221, the first damping friction plate set 281 includes at least one first fixed friction plate and at least one first rotating friction plate in friction connection, the first fixed friction plate and the first rotating friction plate are coaxially sleeved on the driven shaft 211, the first fixed friction plate is fixed on the first damping fixing base 282, and the first rotating friction plate is fixed on the driven shaft 211, so that when the first rotating friction plate rotates along with the driven shaft 211, relative friction rotation occurs between the first rotating friction plate and the first fixed friction plate.

The second damping assembly includes a second damping friction plate group 381 and a second damping fixing seat 382, the second damping fixing seat 382 is fixedly connected with the driving end housing 320, the second damping friction plate group 381 includes at least one second fixed friction plate and at least one second rotating friction plate which are in friction connection, the second fixed friction plate and the second rotating friction plate are coaxially sleeved on the driving shaft 3001, the second fixed friction plate is fixed on the second damping fixing seat 382, and the second rotating friction plate is fixed on the driving shaft 3001, so that the second rotating friction plate rotates relative to the second fixed friction plate when rotating along with the driving shaft 3001.

In this embodiment, the first damping assembly and the second damping assembly are in the form of friction plate sets, and in other embodiments, include, but are not limited to, liquid dampers, gas dampers, and the like.

Referring to fig. 3 and 4 again, in the present embodiment, the rotation detecting mechanism 200 further includes a first rotation limiting mechanism, where the first rotation limiting mechanism includes a first blocking protrusion 291 and a first rotation piece 292, the first blocking protrusion 291 is fixed on the first damping fixing base 282, and the first rotation piece 292 is fixed on the first bending portion 2022, so that the first rotation piece 292 can be blocked by the first blocking protrusion 291 in a state of rotating to an extreme position along with the driven shaft 211.

The driving mechanism 300 further includes a second rotation limiting mechanism, where the second rotation limiting mechanism includes a second blocking protrusion 391 and a second rotating plate 392, the second blocking protrusion 391 is fixed to the second damping fixing base 382, and the second rotating plate 392 is fixed to the second bending portion 3022, so that the second rotating plate 392 can be blocked by the second blocking protrusion 391 when the second rotating plate 392 rotates to a limit position along with the driving shaft 3001.

In the present embodiment, the first rotation piece 292 can be blocked by the first blocking protrusion 291 in a state of being rotated to the limit position along with the driving shaft 211, and the second rotation piece 392 can be blocked by the second blocking protrusion 391 in a state of being rotated to the limit position along with the driving shaft 3001, thereby limiting the limit position of the rotation of the display screen 100.

The terms "first", "second", "third" in the present application are used for descriptive purposes only and are not to be construed as indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. All directional indications (such as up, down, left, right, front, rear) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular pose (as shown in the drawings), and if the particular pose changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims

1. A rotary screen assembly, comprising:

The display screen can rotate along the rotation axis, and two ends of the display screen are respectively a driving end and a driven end in the direction of the rotation axis;

the driving mechanism is connected with the driving end and is used for driving the display screen to rotate;

The rotary detection mechanism is connected with the driven end and is used for detecting the rotation angle of the display screen, the rotary detection mechanism comprises a connecting frame part and a detection part, the connecting frame part comprises a first attaching part and a first bending part, the first attaching part is used for attaching and fixing the display screen, the first bending part bends towards the direction far away from the display screen in the direction perpendicular to the rotation axis relative to the first attaching part, and the detection part is connected with the first bending part, so that orthographic projection of the detection part on the display screen is at least partially overlapped with the display screen.

2. The rotating screen assembly of claim 1, wherein the drive mechanism includes a mounting frame portion and a drive portion, the mounting frame portion includes a second engaging portion and a second bending portion, the second engaging portion is configured to engage and fix the display screen, the second bending portion bends relative to the second engaging portion in a direction perpendicular to the rotation axis and away from the display screen, and the drive portion connects the second bending portion such that an orthographic projection of the drive portion on the display screen at least partially coincides with the display screen.

3. A rotary screen assembly according to claim 1 or 2, wherein the drive mechanism and the rotation detection mechanism are on the same side of the display screen in a direction perpendicular to the axis of rotation.

4. The rotating screen assembly according to claim 2, wherein the first attaching portion and the second attaching portion are provided with fixing holes, and the fixing holes are penetrated through by fasteners and connected to the display screen, so that connection fixation between the first attaching portion and the display screen and connection fixation between the second attaching portion and the display screen are achieved.

5. A rotary screen assembly according to claim 2, wherein the drive portion of the drive mechanism comprises a drive end housing, a drive shaft, a motor and a gear reduction mechanism;

the driving end shell is used for being fixedly connected to the fixing member;

The gear reduction mechanism is positioned in the driving end shell;

The motor is positioned outside the driving end shell, and an output shaft of the motor extends into the driving end shell and is connected with a power input end of the gear reduction mechanism;

One end of the driving shaft extends into the driving end shell and is connected with the power output end of the gear reduction mechanism, the other end of the driving shaft is fixedly connected with the second bending part, and the central axis of the driving shaft coincides with the rotation axis.

6. The rotating screen assembly according to claim 5, wherein the detection portion of the rotation detection mechanism includes a driven end housing, a driven shaft, a magnet, and a magneto-sensitive element;

The driven end housing is used for being fixedly connected to the fixed member;

One end of the driven shaft extends into the driven end shell and is rotationally connected with the driven end shell, the other end of the driven shaft is fixedly connected with the first bending part, and the central axis of the driven shaft coincides with the rotation axis;

the magnet is positioned in the driven end housing, the magnet is connected with the driven shaft to rotate along with the rotation of the driven shaft, and the magnet comprises at least one pair of poles magnetized in the radial direction;

the magnetic sensor is fixed in the driven end shell, is positioned on the central axis of the magnet, and is arranged at intervals with the magnet.

7. The rotating screen assembly of claim 6, wherein the rotation detection mechanism further comprises a first gear and a second gear;

The first gear is positioned in the driven end shell and fixedly sleeved on the driven shaft;

the second gear is positioned in the driven end shell and is coaxially and fixedly connected with the magnet, and the second gear is meshed with the outer side of the first gear.

8. The rotating screen assembly of claim 6, wherein the rotation detection mechanism further comprises a first damping assembly for effecting damped rotation of the driven shaft relative to the driven end housing;

And/or the drive mechanism further comprises a second damping assembly for effecting damped rotation of the drive shaft relative to the drive end housing.

9. The rotary screen assembly of claim 8, wherein the first damping assembly comprises a first damping friction plate group and a first damping fixing seat, the first damping fixing seat is fixedly connected with the driven end shell, the first damping friction plate group comprises at least one first fixed friction plate and at least one first rotary friction plate which are in friction connection, the first fixed friction plate and the first rotary friction plate are coaxially sleeved on the driven shaft, the first fixed friction plate is fixed on the first damping fixing seat, and the first rotary friction plate is fixed on the driven shaft, so that the first rotary friction plate rotates relative to the first fixed friction plate when rotating along with the driven shaft;

And/or, the second damping assembly comprises a second damping friction plate group and a second damping fixing seat, the second damping fixing seat is used for being fixedly connected with the driving end shell, the second damping friction plate group comprises at least one second fixed friction plate and at least one second rotating friction plate which are in friction connection, the second fixed friction plate and the second rotating friction plate are coaxially sleeved on the driving shaft, the second fixed friction plate is fixed on the second damping fixing seat, and the second rotating friction plate is fixed on the driving shaft, so that the second rotating friction plate rotates relative to the second fixed friction plate when rotating along with the driving shaft.

10. The rotating screen assembly of claim 8, wherein the rotation detection mechanism further comprises a first rotation limiting mechanism comprising a first blocking tab and a first rotating tab, the first blocking tab being secured to a first damping mount, the first rotating tab being secured to the first bend to be blocked by the first blocking tab in a state in which the first rotating tab rotates with the driven shaft to an extreme position;

And/or, the driving mechanism further comprises a second rotation limiting mechanism, the second rotation limiting mechanism comprises a second blocking protrusion and a second rotating piece, the second blocking protrusion is fixed on a second damping fixing seat, and the second rotating piece is fixed on the second bending part so that the second rotating piece can be blocked by the second blocking protrusion under the state that the second rotating piece rotates to an extreme position along with the driving shaft.