CN117406542A - Projection screen - Google Patents

Abstract

The application provides a projection screen, which comprises a screen, a screen winding mechanism and an audio output piece; the curtain can be connected in with the curtain winding mechanism, the audio output piece with the curtain winding mechanism is connected, the audio output piece along Y axle direction set up in curtain winding mechanism's front side or rear side, the length of audio output piece is L1, curtain winding mechanism's length is L2, and it satisfies the condition: L1/L2 is more than 0.3 and less than or equal to 1. The projection screen that this application provided can provide sufficient accommodation space for audio output spare to can provide better sound and picture synchronization effect, solve among the prior art because of audio output spare accommodation space limited the problem that audio output effect was limited when leading to sound and picture synchronization.

Description

Projection screen

Technical Field

The application belongs to the technical field of projection, and particularly relates to a projection screen.

Background

The projector is widely applied to industries such as advertising, teaching, propaganda and literature, and the like, and the projection screen is matched with the projector to carry out various video presentations, so that information can be better displayed. At present, two general types of common projection screens are mainly two, one is a manual type projection screen, and the projection screen is wound by the elasticity of a reset spring; another general category is the motorized projection screens, which rely on motorized deployment and retraction of the screen, wherein the motorized projection screens include both floor-lift and roller-blind projection screens, with the floor-lift projection screen motor driving the screen to gradually lift from the ground into the air, and the roller-blind projection screen motor driving the screen to gradually deploy from the air into the ground.

The pursuing of perfect fusion of pictures and sounds is a continuous pursuing of the projection industry, and the existing projection curtain generally needs to be additionally provided with sound equipment in the use process, but the position of the sound equipment is still a certain distance from the projection curtain, so that sound and picture synchronization cannot be well realized.

Aiming at the problems, chinese patent CN206638940U (2017, 11, 14) discloses a multifunctional curtain, and the multifunctional curtain is characterized in that two sound devices are fixedly connected to two ends of a base of a ground-lifting curtain. Although the scheme can solve the problem of asynchronous projection images and sound in the prior art to a certain extent, the scheme still has the following problems: 1. because of the limitation of the base structure, only smaller sound devices can be equipped at two ends of the base, and the sound experience of the smaller sound devices is poor; 2. the sound device is fixed at the bottom, and the sound device still has a certain distance with the central position of the projection curtain picture, and can not realize sound and picture synchronization well.

Disclosure of Invention

The purpose of this application is to solve or partly solve the problem that above-mentioned prior art exists, provides a projection curtain, can realize better sound synchronization, and provides better stereo set experience for the user.

In order to solve the technical problems, in one aspect, the application provides a projection screen, which comprises a screen, a screen winding mechanism and an audio output piece; the curtain can be connected in with the curtain winding mechanism, the audio output piece with the curtain winding mechanism is connected, the audio output piece along Y axle direction set up in curtain winding mechanism's front side or rear side, the length of audio output piece is L1, curtain winding mechanism's length is L2, and it satisfies the condition: L1/L2 is more than 0.3 and less than or equal to 1.

The projection screen that this application provided is integrated to curtain winding mechanism width direction (Y axle direction in the picture) front side or rear side with audio output spare to can hold and place great volumetric audio output spare, with the technical problem that the setting of audio output spare is restricted in base both ends space in order to solve prior art, great audio output spare often means great loudspeaker, great audio space, thereby can output better audio effect, improve user experience. In addition, through setting up audio output piece length for L1 and curtain winding mechanism length L2, satisfy the condition: L1/L2 is more than 0.3 and less than or equal to 1, so that the problem that the audio output quality is poor due to the fact that the volume of an audio output piece is too small is avoided, and the problem that the easy storage difficulty of the audio output piece is increased due to overlong audio output piece is avoided.

Further, the audio output piece comprises a first audio output piece and a second audio output piece, and the projection screen further comprises a first rotating mechanism and a second rotating mechanism; the first audio output piece is rotationally connected with one end of the curtain winding mechanism through the first rotating mechanism, and the second audio output piece is rotationally connected with the other end of the curtain winding mechanism through the second rotating mechanism. In this embodiment, the audio output part is split into two parts, and the audio output is performed in the partition, so that the audio output effect can be better improved. In addition, through setting up first audio output spare, second audio output spare and curtain winding mechanism and rotating to be connected, can adjust first audio output spare, second audio output spare relative position according to the demand, improve user experience.

Specifically, the first rotating mechanism comprises a first rotating shaft assembly, one end of the first rotating shaft assembly is connected with the curtain winding mechanism, and the other end of the first rotating shaft assembly is connected with the first audio output piece and used for rotating the first audio output piece in an XOZ plane; the second rotating mechanism comprises a second rotating shaft assembly, one end of the second rotating shaft assembly is connected with the curtain winding mechanism, the other end of the second rotating shaft assembly is connected with the second audio output piece and used for rotating the second audio output piece in the XOZ plane, the XOZ plane is a plane formed by an X axis and a Z axis, and the X axis and the Z axis are mutually perpendicular.

Specifically, the first rotating shaft assembly and/or the second rotating shaft assembly comprises a rotating shaft, a base and a torsion spring, the first audio output piece and/or the second audio output piece comprises a cover body and an audio output piece body, and the cover body is fixedly connected with the audio output piece body; the rotating shaft is fixedly connected with the base, the torsion spring is sleeved on the periphery of the rotating shaft, one end of the torsion spring is fixedly connected with the rotating shaft and/or the base, and the other end of the torsion spring is fixedly connected with the cover body.

Specifically, the first rotating shaft assembly and/or the second rotating shaft assembly further comprises a rotating motor, a first transmission gear and a second transmission gear, the first transmission gear is fixedly connected with the rotating motor, the second transmission gear is fixedly connected with the rotating shaft, and the first transmission gear is meshed with the second transmission gear.

Further, a through hole is formed in the peripheral surface of the rotating shaft, and an audio transmission line of the first audio output piece or the second audio output piece penetrates out of the through hole.

Further, the first rotating mechanism and/or the second rotating mechanism further comprise a translation component, the translation component is used for translating the first audio output piece and/or the second audio output piece along the Y-axis direction away from the viewer, and the X-axis, the Y-axis and the Z-axis are mutually perpendicular.

Further, the panning component is further configured to pan the first audio output element and/or the second audio output element along the Z-axis direction.

Specifically, the translation assembly comprises a base, a translation motor, a first crank and a second crank; the translation motor is fixedly arranged on the base, the power output end of the translation motor is fixedly connected with one end of the first crank, the other end of the first crank is rotationally connected with the first audio output piece or the second audio output piece, one end of the second crank is rotationally connected with the base, and the other end of the second crank is rotationally connected with the first audio output piece or the second audio output piece.

In one embodiment, the audio output piece is disposed at a rear side of the curtain winding mechanism along the Y-axis direction, the curtain includes a projection area and a non-projection area, and the non-projection area and the area corresponding to the audio output piece are provided with sound transmission holes.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a projection screen according to one embodiment of the present application;

FIG. 2 is a schematic front view of a projection screen according to another embodiment of the present disclosure in a first state;

FIG. 3 is a schematic perspective view of the projection screen in a first state in the embodiment of FIG. 2;

FIG. 4 is a schematic front view of the screen in the second state of the audio output member of the embodiment of FIG. 2;

FIG. 5 is a schematic perspective view of the screen in the second state of the audio output member of the embodiment of FIG. 2;

FIG. 6 is a schematic exploded view of the first rotor assembly of the embodiment of FIG. 2;

FIG. 7 is a schematic illustration of the motor configuration in the first spindle assembly;

FIG. 8 is a schematic diagram of an exploded view of a first audio output;

FIG. 9 is a schematic diagram of a repeater and audio transmission line structure in one embodiment;

FIG. 10 is a cross-sectional view of a rotor assembly in an embodiment taken along a height direction;

FIG. 11 is a schematic front view of a projection screen according to another embodiment of the present disclosure in a first state;

FIG. 12 is a schematic perspective view of the screen in the first state of the audio output member of the embodiment of FIG. 11;

FIG. 13 is a schematic side view of the screen of the embodiment of FIG. 11 with the audio output member in a first position;

FIG. 14 is a schematic view of the front structure of the screen of the embodiment of FIG. 11 with the audio output member in a second position;

FIG. 15 is a schematic perspective view of the screen in the second state of the audio output member of the embodiment of FIG. 11;

FIG. 16 is a schematic side view of the screen of the embodiment of FIG. 11 with the audio output member in a second position;

FIG. 17 is a schematic view of the front structure of the screen of the embodiment of FIG. 11 with the audio output member in a third position;

FIG. 18 is a schematic perspective view of the screen in the third state of the audio output member of the embodiment of FIG. 11;

FIG. 19 is a schematic side view of the screen in a third configuration of the audio output device of the embodiment of FIG. 11;

FIG. 20 is a schematic diagram of a translation assembly in one embodiment;

FIG. 21 is an exploded view of the translation assembly of the embodiment of FIG. 20;

FIG. 22 is a schematic view of a projection screen according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be further noted that terms such as left, right, upper, and lower in the embodiments of the present application are merely relative terms or references to normal use states of the product, and should not be construed as limiting.

Referring to fig. 1, an exploded view of a stereoscopic projection screen according to an embodiment of the present application is shown, the projection screen includes a curtain 11, a curtain winding mechanism 10, and an audio output member 2; the curtain 11 can be rolled up on the curtain rolling mechanism 10, and the audio output piece 2 is fixedly connected with the curtain rolling mechanism (in order to make the separation of the lengths of the curtain rolling mechanism 10 and the audio output piece 2 convenient in the figure). The audio output element 2 is disposed on the front side of the curtain winding mechanism along the Y-axis direction, i.e. on the side close to the user, and of course, the audio output element 2 may also be disposed on the rear side of the curtain winding mechanism along the Y-axis direction. In this application, through with audio output spare fixed connection in curtain winding mechanism 10's front side or rear side, can provide more spaces for audio output spare, can hold bigger audio output spare to solve prior art and set up the stereo set and lead to the stereo set volume too little at ground rising curtain base both ends, output audio frequency effect subalternation problem.

In addition, audio output piece length L1 and curtain winding mechanism length L2, the ratio satisfies the condition: the length of the audio output piece is longest to be equal to the length 12 of the curtain winding mechanism, so that the storage difficulty of the whole projection screen can not be additionally increased. It should be noted that, because the audio output piece is still connected with the curtain winding mechanism through a certain mechanical structure, the length L2 of the curtain winding mechanism in the application generally further comprises the length of the mechanical structure.

In addition, it should be noted that, in the drawings provided in the embodiments of the present application, the ground lifting curtain is taken as an example for illustration, and the curtain winding mechanism 10 is a base of the ground lifting curtain; but the solution disclosed in the present application is equally applicable to a roller blind type curtain, and the curtain winding mechanism 10 is a roller of the roller blind type curtain.

Referring to fig. 1, the X-axis direction is the length direction of the curtain winding mechanism 10, the Y-axis direction is the width direction of the curtain winding mechanism 10, and the Z-axis direction is the height direction of the curtain winding mechanism 10. The included angles between the X axis direction, the Y axis direction and the Z axis direction are 90 degrees, and can be above and below 90 degrees, such as 85 degrees to 95 degrees.

Referring to fig. 2-5, there are shown schematic views of a projection screen according to another embodiment of the present application. The audio output piece 2 includes a first audio output piece 21 and a second audio output piece 22, the projection screen further includes a first rotating mechanism 20 and a second rotating mechanism 30, the first audio output piece 21 is rotationally connected with one end of the curtain winding mechanism 10 through the first rotating mechanism 20, and the second audio output piece 22 is rotationally connected with the other end of the curtain winding mechanism 10 through the second rotating mechanism 30. In the first state, the first audio output piece 21 and the second audio output piece 22 are arranged at the front side or the rear side of the curtain winding mechanism 10 along the Y axis in the length direction; in the second state, the first rotating mechanism 20 drives the first audio output element 21 to rotate in the X0Z plane, so that the first audio output element 21 is erected on the other side of the curtain 11 along the Z axis direction, and the second rotating mechanism 30 drives the second audio output element 22 to rotate in the X0Z plane, so that the second audio output element 22 is erected on the other side of the curtain 11 along the Z axis direction. The arrows in fig. 4 indicate the movement trajectories of the first audio output member 21 and the second audio output member 22, respectively.

In the first state, the first audio output element 21 and the second audio output element 22 occupy less space in an aligned manner, and do not block the projection screen of the curtain 11. In the second state, the first audio output piece 21 and the second audio output piece 22 are respectively erected at two ends of the curtain winding mechanism 10, the generated sound field is wider, and the audio output of the left and right channels can also obtain corresponding space in space, so that a user obtains better sound effect experience.

It should be noted that, in each of the drawings, the sum of the lengths of the first audio output element 21 and the second audio output element 22 is equal to the length of the curtain winding mechanism 10, but it does not indicate that the sum of the lengths of the first audio output element 21 and the second audio output element 22 can only be equal to the length of the curtain winding mechanism 10, and the sum of the lengths of the first audio output element 21 and the second audio output element 22 can also be smaller than the length of the curtain winding mechanism 10, so that the space is not hindered in storage but is not fully utilized to improve the audio quality of the output sound box.

Referring to fig. 5, a schematic perspective view of a projection screen in a second state is shown, and it can be seen from the figure that when the first audio output element 21 and the second audio output element 22 stand on the front side of the screen winding mechanism 10 along the Y-axis direction, they can block a user from viewing a screen on the screen 11 at a partial view angle. A solution that can be adopted is to move the first audio output member 21 and the second audio output member 22 toward the rear side of the screen by a backward movement mechanism when they are erected to reduce or eliminate the obstruction of the user's viewing angle. Alternatively, after the first audio output member 21 and the second audio output member 22 are erected, the first audio output member 21 is panned to the left and the second audio output member 22 is panned to the right by the panning mechanism, so as to reduce or eliminate the shielding of the viewing angle of the user. Or, preferably, the first audio output piece 21 and the second audio output piece 22 are disposed at the rear side of the curtain winding mechanism 10 along the Y axis direction, and the second state is that the first audio output piece 21 and the second audio output piece 22 are located at the rear side of the curtain 11 when standing up, so that the viewing angle of the user is not blocked. It should be noted that, in one embodiment, the curtain 11 includes a projection area 111 and a non-projection area 112, when the first audio output element 21 and the second audio output element 22 are disposed at the rear side of the curtain winding mechanism 10 along the Y-axis direction, in order to avoid the audio output of the first audio output element 21 and the second audio output element 22 from being blocked by the curtain 11, sound transmission holes may be disposed on the non-projection area 112, and also sound transmission holes may be disposed in both the projection area 111 and the non-projection area 112, where the area of the sound transmission holes disposed in the projection area 111 is smaller than that of the non-projection area 112, so as to avoid affecting the projection effect under the condition of realizing sound transmission.

Referring to fig. 6-10, a schematic structural diagram of the first shaft assembly 20 is shown. The first shaft assembly 20 includes a first shaft fixing nut 201, a base 202, a shaft 203, a limiting portion 2031, a torsion spring 204, a second shaft fixing nut 206, and a first shaft cover 207, where the base 202 is used to support the shaft 203, the first shaft fixing nut 201, the limiting portion 2031, and the second shaft fixing nut 206 are used to limit movement of the shaft 203 along the Y-axis direction, and the first shaft cover 207 is used to cover one end of the shaft 203 after the shaft passes through a limiting hole 211 of the first audio output member 20. Further, as shown in fig. 8, the first audio output element 20 includes an audio output element body 21a and a cover 210, and the cover 210 is used to cover the first rotating element 20 on the outer side of the X-axis direction after the first rotating element 20 is connected to one end of the audio output element body 21 a. It should be noted that the second shaft assembly 30 has the same structure, and is not described herein.

In the present embodiment, the states of the first audio output member 21 and the second audio output member 22 can be manually adjusted, and the first audio output member 21 and the second audio output member 22 can be turned over and set at the desired positions because the torsion springs 204 are provided.

Further, the first rotating shaft assembly 20 further comprises a rotating motor 200, a first transmission gear 2001 and a second transmission gear 205, the first transmission gear 2001 is fixedly connected with the rotating motor 200, the second transmission gear 205 is fixedly connected with the rotating shaft 203, the first transmission gear 2001 is meshed with the second transmission gear 205, so that the motor 200 drives the first transmission gear 2001 to rotate, and the second transmission gear 205 meshed with the first transmission gear 2001 is driven to rotate, and the second transmission gear 205 twists the rotating shaft 203 to rotate, so that the first audio transmission piece 21 fixedly connected with the rotating shaft is driven to rotate. In this embodiment, the first audio transmission part 21 and the second audio transmission part 22 can be driven by the motor to realize electric operation, so that user experience is improved.

Further, as shown in fig. 9, a through hole 2032 is provided on the circumferential surface of the rotation shaft 203, and the audio transmission line of the first audio output member 21 passes through the through hole 2032, avoiding interference with the audio transmission line due to rotation of the first audio output member 21.

Referring to fig. 11-19, schematic diagrams of a projection screen according to another embodiment of the present application are shown. In contrast to the embodiment shown in fig. 2-5, the first rotation mechanism of the present embodiment further includes a translation assembly 40, and symmetrically, the second rotation assembly may also include a translation assembly that is identical to the translation assembly 40 of the first rotation mechanism. Only the specific structure of the first rotating-structure translating assembly 40 will be described in the following embodiments, and the description of the structure of the second rotating-structure translating assembly will not be repeated.

As can be seen, the translation assembly 40 is connected to the curtain reel mechanism 10 at one end and to the first spindle assembly 20 at one end. The panning component 40 is used to pan the first audio output 21 in the Y-axis direction away from the viewer, i.e., in the Y-axis positive direction as shown. It should be noted that, after the first rotating shaft assembly 20 changes the first audio output element 21 from the first state to the second state, the panning assembly 40 is configured to pan the first audio output element 21 along the Y-axis in a direction away from the viewer, and the position where the panning stops is determined so as not to obstruct the viewer from seeing the projection screen from a possible angle.

In other embodiments, the translation assembly 40 is further configured to translate the first audio output piece 21 along the Z-axis direction, that is, raise the position of the first audio output piece 21 in the Z-axis direction, so that the central axes of the first audio output piece 21 and the projection area 111 of the curtain 11 are substantially the same, and thus, audio-visual unification can be better achieved.

In a specific implementation manner, please refer to fig. 20-21, the translation assembly 40 includes a base 46, a translation motor 44, a first crank 411, and a second crank 412, the translation motor 44 is fixedly disposed on the base 46, a power output end of the translation motor 44 is fixedly connected to one end of the first crank 411, the other end of the first crank is rotatably connected to the first audio output member 21, one end of the second crank 412 is rotatably connected to the base 46, and the other end of the second crank is rotatably connected to the first audio output member 21; specifically, a rotating shaft 2021 is disposed on a connecting side of the base 202 of the first rotating shaft assembly 20 and the translation assembly 40, the first crank 411 and the second crank 412 are fixedly connected with the rotating shaft 2021, at this time, the rotating shaft 2021, the first crank 411, the second crank 412 and the base 46 form a parallel four-bar structure, and at this time, the first audio output member 21 can move along the direction away from the viewer along the Y-axis direction and be lifted along the Z-axis direction under the driving of the translation motor 44.

Further, the translation assembly 40 further includes a base cover 45, where the base cover 45 is matched with and fixedly connected to the base 26, and a through hole is provided on the base cover to allow the first crank 411 and the second crank 412 to pass through.

Fig. 11-13 are schematic diagrams of the first audio output element 21 in the first state, and fig. 14-16 are schematic diagrams of the first audio output element 21 in the second state, where the first audio output element 21 standing on the front side of the curtain 11 may block the viewing area of the left user. 17-19, a schematic view of the first audio output member 21 in a third state is shown, where the first audio output member 21 is simultaneously moved away from the viewer in the Y-axis direction and lifted in the Z-axis direction by the pan assembly 40.

The projection screen that this application provided can provide sufficient accommodation space for audio output spare to can provide better sound and picture synchronization effect, solve among the prior art because of audio output spare accommodation space limited the problem that audio output effect was limited when leading to sound and picture synchronization. In addition, the audio output piece that this application provided still can have multiple service condition, satisfies user's different user demand.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, or alternatives falling within the spirit and principles of the present application.

Claims (11)

1. The projection screen is characterized by comprising a screen, a screen winding mechanism and an audio output piece; the curtain can be connected in with the curtain winding mechanism, the audio output piece with the curtain winding mechanism is connected, the audio output piece along Y axle direction set up in curtain winding mechanism's front side or rear side, the length of audio output piece is L1, curtain winding mechanism's length is L2, and it satisfies the condition: L1/L2 is more than 0.3 and less than or equal to 1.

2. The projection screen of claim 1, wherein the audio output member comprises a first audio output member, a second audio output member, the projection screen further comprising a first rotating mechanism, a second rotating mechanism; the first audio output piece is rotationally connected with one end of the curtain winding mechanism through the first rotating mechanism, and the second audio output piece is rotationally connected with the other end of the curtain winding mechanism through the second rotating mechanism.

3. The projection screen of claim 2, wherein the first rotating mechanism includes a first rotating shaft assembly having one end coupled to the screen winding mechanism and another end coupled to the first audio output member for rotating the first audio output member in the XOZ plane; and/or the second rotating mechanism comprises a second rotating shaft assembly, one end of the second rotating shaft assembly is connected with the curtain winding mechanism, the other end of the second rotating shaft assembly is connected with the second audio output piece and is used for rotating the second audio output piece in the XOZ plane, the XOZ plane is a plane formed by an X axis and a Z axis, and the X axis and the Z axis are mutually perpendicular.

4. The projection screen of claim 3, wherein the first and/or second spindle assemblies comprise spindles, bases, torsion springs, the first and/or second audio output members comprise a cover, an audio output member body, the cover fixedly connected to the audio output member body; the rotating shaft is fixedly connected with the base, the torsion spring is sleeved on the periphery of the rotating shaft, one end of the torsion spring is fixedly connected with the rotating shaft and/or the base, and the other end of the torsion spring is fixedly connected with the cover body.

5. The projection screen of claim 4, wherein the first and/or second spindle assemblies further comprise a rotating electrical machine, a first drive gear fixedly coupled to the rotating electrical machine, and a second drive gear fixedly coupled to the spindle, the first drive gear meshed with the second drive gear.

6. The projection screen of claim 4, wherein the shaft has a through hole formed in a circumferential surface thereof, and the audio transmission line of the first audio output member or the second audio output member passes through the through hole.

7. The projection screen of claim 3, wherein the first and/or second rotating mechanisms further comprise a translation assembly for translating the first and/or second audio output member away from the viewer along a Y-axis direction, the Y-axis being perpendicular to the X-axis and the Z-axis.

8. The projection screen of claim 7, wherein the panning assembly is further configured to pan the first audio output member and/or the second audio output member along the Z-axis direction.

9. The projection screen of claim 8, wherein the translation assembly comprises a base, a translation motor, a first crank, a second crank; the translation motor is fixedly arranged on the base, the power output end of the translation motor is fixedly connected with one end of the first crank, the other end of the first crank is rotationally connected with the first audio output piece or the second audio output piece, one end of the second crank is rotationally connected with the base, and the other end of the second crank is rotationally connected with the first audio output piece or the second audio output piece.

10. The projection screen of claim 9, wherein the translation assembly further comprises a base cover mated with the base and having a through hole disposed therein for the passage of the first and second cranks.

11. The projection screen of claim 1, wherein the audio output member is disposed at a rear side of the screen winding mechanism along a Y-axis direction, the screen includes a projection area and a non-projection area, and the non-projection area and the audio output member are provided with sound-transmitting holes in a corresponding area.