CN215769337U - Projection screen and laser projection equipment - Google Patents
Projection screen and laser projection equipment Download PDFInfo
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- CN215769337U CN215769337U CN202121316465.XU CN202121316465U CN215769337U CN 215769337 U CN215769337 U CN 215769337U CN 202121316465 U CN202121316465 U CN 202121316465U CN 215769337 U CN215769337 U CN 215769337U
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Abstract
The embodiment of the application discloses projection screen and laser projection equipment, and belongs to the technical field of projection. The projection screen includes: the curling mechanism is limited on the support body and comprises a driving assembly, a plurality of lifting frames and a lifting mechanism of a cross beam; the lifting frame comprises a lifting rod and a driving rod, the lifting rod, the driving rod, the supporting body, the cross beam and the driving assembly are all in rotatable connection, and at least one of the rotatable connections is in a connection structure with two sides clamped; two opposite side edges of the curtain sheet are respectively and fixedly connected with the curling mechanism and the cross beam. In the embodiment of the application, at least one rotatable connection among the lifting rod, the driving rod, the supporting body, the driving assembly and the cross beam is a connecting structure in a clamping shape at two sides, so that the condition that the connecting shaft at the rotatable connection part bears abrasion due to bearing of lateral shearing force when the curtain sheet is folded or unfolded is avoided, and the service life of the projection screen is prolonged.
Description
Technical Field
The embodiment of the application relates to the technical field of projection, in particular to a projection screen and laser projection equipment.
Background
With the continuous development of science and technology, laser projection equipment is more and more applied to the work and the life of people. At present, a laser projection apparatus mainly includes a laser projection host and a projection screen, wherein a light outlet of the laser projection host faces the projection screen to emit a light beam to the projection screen, and the projection screen is configured to receive the light beam to implement display of a picture.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a projection screen and laser projection equipment, can avoid among the projection screen connecting axle of rotatable coupling department to bear the side direction shearing force, improves projection screen's life's problem. The technical scheme is as follows:
in one aspect, a projection screen is provided, the projection screen comprising:
a support body;
the curling mechanism is limited on the support body;
the lifting mechanism comprises a driving assembly, a plurality of lifting frames and a cross beam;
the driving assembly is limited on the supporting body, the lifting frame comprises a lifting rod and a driving rod, two ends of the lifting rod are respectively and rotatably connected with the supporting body and the cross beam, two ends of the driving rod are respectively and rotatably connected with the driving assembly and the lifting rod, at least one rotatable connection in the plurality of rotatable connections is a connecting structure in a clamping shape at two sides, and the driving assembly is used for driving the end part of the driving rod to move;
the first side edge of the curtain sheet is fixedly connected with the curling mechanism, the second side edge, opposite to the first side edge, of the curtain sheet is fixedly connected with the cross beam, and the curling mechanism is matched with the lifting mechanism to pack or unfold the curtain sheet.
In another aspect, there is provided a laser projection apparatus including:
a receiving portion including a first receiving portion having a light transmitting region and a second receiving portion having an opening;
the laser projection host is positioned in the first accommodating part, and light beams emitted by the laser projection host can penetrate through the light-transmitting area;
in the projection screen according to the above aspect, the support body is fixed in the second accommodating portion, the curtain sheet can be retracted into the second accommodating portion or pass through the opening and be unfolded, and the curtain sheet receives the light beam when being unfolded to display a picture.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
in this application embodiment, drive assembly drives the tip removal of actuating lever to realize the rise or the decline of the actuating lever other end, and then drive the lifter by the actuating lever and rise or descend, with the rise or the decline of realization crossbeam, like this, can realize packing up or expanding of curtain piece under crimping mechanism and drive assembly's cooperation, and avoided the occupation of projection screen to the space when not using projection screen. In addition, at least one rotatable connection among the lifting rod, the driving rod, the supporting body, the driving assembly and the cross beam is a connecting structure in a clamping shape at two sides, so that the situation that a connecting shaft at the rotatable connection part bears lateral shearing force when the curtain sheet is folded or unfolded is avoided, the situation that a connecting bearing is abraded and the crane is inclined is avoided, and the service life of the projection screen is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a retracted state of a projection screen according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a projection screen in an unfolded state according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a rotatable connection structure provided in the related art;
FIG. 4 is a force analysis diagram of a rotatable connection structure provided in the related art;
FIG. 5 is a schematic view of a rotatable connection structure provided in an embodiment of the present application;
FIG. 6 is a force analysis diagram of a rotatable connection structure provided in an embodiment of the present application;
FIG. 7 is a schematic diagram of another retracted state of a projection screen according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a conveyor belt assembly provided in an embodiment of the present application;
FIG. 9 is a schematic structural diagram of another expanded state of a projection screen according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present application.
Reference numerals:
the related technology comprises the following steps:
1: a first connecting member; 2: a second connecting member;
the embodiment of the application:
1: a support body; 2: a crimping mechanism; 3: a lifting mechanism; 4: a screen sheet;
11: a base plate; 12: a side plate;
31: a drive assembly; 32: a lifting frame; 33: a cross beam;
311: a drive motor; 312: a conveyor belt assembly; 313: a lead screw; 314: a slider; 315: a guide bar;
3121: a gearbox; 3122: a first pulley; 3123: a second pulley; 3124: a third belt pulley; 3125: a first conveyor belt; 3126: a second conveyor belt; 3127: a limiting member;
321: a lifting rod; 322: a drive rod; 323: a first connecting member; 324: a second connecting member;
3211: a driven lever; 3212: a support bar;
3221: a first power rod; 3222: a second power rod; 3223: an auxiliary lever;
10: a storage section; 20: a laser projection host; 30: a projection screen;
101: a first receptacle portion; 102: a second receptacle portion; 103: a light-transmitting region; 104: and (4) opening.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Fig. 1 illustrates a schematic structural diagram of a retracted state of a projection screen according to an embodiment of the present application, and fig. 2 illustrates a schematic structural diagram of an extended state of a projection screen according to an embodiment of the present application. As shown in fig. 1 or 2, the projection screen includes: a support body 1; the curling mechanism 2 is limited on the support body 1; the lifting mechanism 3 comprises a driving assembly 31, a plurality of lifting frames 32 and a cross beam 33; the driving assembly 31 is limited on the supporting body 1, the lifting frame 32 comprises a lifting rod 321 and a driving rod 322, two ends of the lifting rod 321 are respectively rotatably connected with the supporting body 1 and the cross beam 33, two ends of the driving rod 322 are respectively rotatably connected with the driving assembly 31 and the lifting rod 321, at least one rotatable connection in the plurality of rotatable connections is a connection structure in a clamping shape at two sides, and the driving assembly 31 is used for driving the end part of the driving rod 322 to move; the curtain 4, the first side and the crimping mechanism 2 fixed connection of curtain 4, the second side and crossbeam 33 fixed connection relative with first side on the curtain 4, crimping mechanism 2 and 3 cooperation of elevating system are in order to pack up or expand curtain 4.
In the embodiment of the present application, the driving assembly 31 drives the end of the driving rod 322 to move, so as to realize the raising or lowering of the other end of the driving rod 322, and further the driving rod 322 drives the lifting rod 321 to raise or lower, so as to realize the raising or lowering of the beam 33, and thus, the curtain sheet 4 can be folded or unfolded under the cooperation of the curling mechanism 2 and the driving assembly 31, and the occupation of the projection screen 30 on the space is avoided when the projection screen 30 is not used.
In addition, in the related art, the first connecting member 1 and the second connecting member 2 at the rotatable connection are of a left-right overlapping connection structure as shown in fig. 3, and the force analysis of the connection shaft at the rotatable connection is shown in fig. 4, so that the connection shaft at the rotatable connection in the related art is easily subjected to lateral shear force. In the embodiment of the present application, the first connecting member 323 and the second connecting member 324 of at least one rotatable connection between the lifting rod 321, the driving rod 322, the supporting body 1, the driving assembly 31 and the cross beam 33 are in a two-side clamping connection structure as shown in fig. 5, and the stress analysis of the connecting shaft is shown in fig. 6, so that the situation that the connecting shaft at the rotatable connection bears a lateral shear force when the curtain sheet 4 is retracted or extended is avoided, the situation that the connecting bearing is worn and the crane 32 is inclined is avoided, and the service life of the projection screen 30 is prolonged.
For any one of the at least one rotatable connection, the end of the first connecting part 323 of the rotatable connection has two side walls arranged oppositely, the end of the second connecting part 324 of the rotatable connection is located between the two side walls, and the connecting shaft penetrates through the two side walls of the first connecting part 323 and the end of the second connecting part 324, so that the rotatable connection is a two-side clamped connecting structure.
It should be noted that, for the first connector 323, two sidewalls may extend from an end portion of the first connector 323, or the first connector 323 includes a first sub-connector and a second sub-connector, and the end portion of the first sub-connector and the end portion of the second sub-connector form two sidewalls of the first connector 323.
In addition, the plurality of rotatable connections are all connections in which two connecting pieces can rotate relatively in the plane. For any of the plurality of rotatable connections, the side wall of the end of the first connector 323 of the rotatable connection has a first support block on which the end of the second connector 324 of the rotatable connection is rotatably supported. In this way, the first support block supports the second connecting member 324, so that the balance of the lateral shearing force borne by the connecting shaft can be realized, and the condition that the lateral shearing force borne by the connecting shaft causes abrasion can be avoided.
Alternatively, the surface of the first support block facing the second connecting member 324 has a semi-cylindrical groove, the end of the second connecting member 324 has a semi-cylindrical structure, and the end of the second connecting member 324 is supported in the semi-cylindrical groove of the first support block. Thus, the second connecting member 324 is supported on the first supporting block and rotates relative to the first supporting block.
It should be noted that, when the rotatable connection is a two-side clamping connection structure, the first supporting block is located between two side walls of the first connecting member 323 to support the end of the second connecting member 324.
In the embodiment of the present application, as shown in fig. 1 or fig. 2, the support body 1 includes a bottom plate 11 and a pair of side plates 12, and the pair of side plates 12 are fixed on both sides of the bottom plate 11 perpendicular to the length direction. At this time, two ends of the curling mechanism 2 are respectively connected with the pair of side plates 12, the bottom plate 11 is provided with a first fixing seat and a second fixing seat, the driving assembly 31 is limited on the first fixing seat, and one end of the lifting rod 321 is rotatably connected with the second fixing seat.
Of course, the support body 1 may have other structures as long as the connection between the curling mechanism 2, the driving assembly 31 and the crane 32 can be realized, and the embodiment of the present application is not limited thereto.
In the embodiment of the present application, the curtain sheet 4 is an optical curtain sheet 4, for example, a rollable fresnel optical screen, or a flexible black screen, and such curtain sheet 4 has a higher optical gain compared to the conventional curtain sheet 4, can reduce the brightness and contrast of the light beam as much as possible, and can realize a higher flatness by stretching the rolling mechanism 2 and the lifting mechanism 3, so that the picture display effect of the curtain sheet 4 is better.
The specific structure of the crimping mechanism 2 can refer to the related art, and the embodiment of the present application is not limited to this. Illustratively, the winding mechanism 2 includes a winding drum, a connecting shaft, and a clockwork; the first end of connecting axle is connected with curb plate 12 of supporter 1, and the second end and the reel of connecting axle are connected, and clockwork spring assembly's first end is spacing on the connecting axle, and clockwork spring assembly's second end is spacing on curb plate 12 or reel, and the first side and the reel fixed connection of curtain 4, the reel can rotate under clockwork spring assembly's effect to control curtain 4 to roll up.
Next, the driving assembly 31 and the crane 32 included in the lifting mechanism 3 in the embodiment of the present application will be explained in detail.
In some embodiments, as shown in fig. 7, the driving assembly 31 includes a driving motor 311, a conveyor belt assembly 312, a lead screw 313 and a plurality of sliding blocks 314, the lead screw 313 is rotatably fixed on the supporting body 1, the plurality of sliding blocks 314 are screwed on the lead screw 313, and when the lead screw 313 rotates, two sliding blocks 314 of the plurality of sliding blocks 314 approach to or move away from each other; the output shaft of the driving motor 311, the conveyor belt assembly 312 and the lead screw 313 are sequentially connected in a transmission manner, the driving motor 311 is used for driving the lead screw 313 to rotate, the plurality of sliders 314 correspond to the plurality of lifting frames 32 one by one, and the end part of the driving rod 322 is rotatably connected with the corresponding slider 314.
In the actual implementation process, the lead screw 313 is rotatably limited on the support body 1, so that the drive motor 311 can drive the lead screw 313 to rotate in place through the conveyor belt component 312 after being started, and the drive rod 322 can limit the rotation of the slider 314, so that the slider 314 can only move on the lead screw 313, and further the end part of the drive rod 322 is driven to synchronously move, and the other end of the drive rod 322 is lifted or lowered; when the driving rod 322 is lifted or lowered, the lifting rod 321 can be driven to be lifted or lowered synchronously to lift or lower the cross beam 33, and further lift or lower the curtain sheet 4.
The output shaft of the driving motor 311 is parallel to the length direction of the lead screw 313, that is, the driving motor 311 is located at a position parallel to the length direction of the lead screw 313, so that the driving motor 311 is prevented from increasing the overall length of the lifting mechanism 3, and the projection screen 30 is facilitated to be miniaturized.
The screw 313 is an integral structure, and the thread directions of the two ends of the screw 313 are opposite, so that the conveyor belt assembly 312 can be connected to the end of the screw 313 or the middle position of the screw 313; or the lead screw 313 comprises a left lead screw and a right lead screw, and the conveyor belt assembly 312 is connected with one end of the left lead screw and one end of the right lead screw at the same time, namely the position where the conveyor belt assembly 312 is connected between the left lead screw and the right lead screw.
The number of the sliders 314 corresponds to the number of the lifting frames 32, that is, the slider 314 is connected to one end of the driving rod 322 of each lifting frame 32. Optionally, the number of the sliding blocks 314 is 2, and the two sliding blocks 314 are respectively connected to the lead screw at different positions of the thread direction, so as to ensure that the two sliding blocks 314 can approach or separate from each other when the lead screw 313 rotates.
In addition, since the slider 314 and the driving rod 322 are rotatably connected, a gap is inevitably formed between the slider 314 and the driving rod 322, and the slider 314 slightly shakes due to the gap when the lead screw 313 rotates. In order to ensure the stability of the sliding blocks 314, as shown in fig. 7, the driving assembly 31 further includes a guide rod 315, the guide rod 315 is fixed on the supporting body 1, and the plurality of sliding blocks 314 are slidably retained on the guide rod 315. Therefore, the sliding block 314 can be limited by the guide rod 315, so as to avoid the sliding block 314 from shaking.
In the embodiment of the present application, the conveyor belt assembly 312 is mainly used for decelerating to avoid the lead screw 313 rotating too fast.
The conveyor belt assembly 312 includes at least one pulley assembly, each pulley assembly includes a large pulley, a small pulley and a conveyor belt, the small pulley is used as a driving wheel, the large pulley is used as a driven wheel, and the large pulley of one of the two adjacent stages is concentrically and fixedly connected with the small pulley of the other stage.
Taking the example where the conveyor belt assembly 312 includes a two-stage pulley assembly, as shown in fig. 8, the conveyor belt assembly 312 includes a transmission 3121 body, a first pulley 3122, a second pulley 3123, a third pulley 3124, a first conveyor 3125, and a second conveyor 3126; the first belt pulley 3122 and the second belt pulley 3123 are rotatably fixed on the gear box 3121 body, the first belt pulley 3122 is fixedly connected with the output shaft of the driving motor 311, the third belt pulley 3124 is sleeved on the lead screw 313, and is fixedly connected with the lead screw 313; the second pulley 3123 has a large circular groove and a small circular groove, the first belt 3125 is fitted over the large circular grooves of the first pulley 3122 and the second pulley 3123, and the second belt 3126 is fitted over the small circular groove of the second pulley 3123 and the third pulley 3124.
The first belt pulley 3122 is used as a driving wheel of the first-stage belt pulley assembly, the large circular groove on the second belt pulley 3123 is used as a driven wheel of the first-stage belt pulley assembly, the small circular groove on the second belt pulley 3123 is used as a driving wheel of the second-stage belt pulley assembly, the third belt pulley 3124 is used as a driven wheel of the second-stage belt pulley assembly, the outer diameter of the first belt pulley 3122 is smaller than the outer diameter of the large circular groove on the second belt pulley 3123, and the outer diameter of the small circular groove on the second belt pulley 3123 is smaller than the outer diameter of the third belt pulley 3124. Thus, the rotation speed of the driving motor 311 can be reduced through the two-stage belt wheel assembly, and the problem that the rotation speed of the lead screw 313 is too high is avoided.
It should be noted that, when the screw 313 is driven to rotate by the conveyor belt assembly 312, in order to avoid a slip between the belt pulley and the conveyor belt included in the conveyor belt assembly 312, as shown in fig. 8, the conveyor belt assembly 312 further includes a limiting member 3127, the limiting member 3127 is movably limited on the transmission case 3121, and the limiting member 3127 can tighten the first conveyor belt 3125 or the second conveyor belt 3126. Thus, the first conveyor belt 3125 or the second conveyor belt 3126 can be tightened by the limiting member 3127, so as to avoid the slip between the conveyor belt and the belt wheel.
In some embodiments, as shown in fig. 2 or 9, the lifting rod 321 includes a driven rod 3211 and a support rod 3212; a first end of the driven rod 3211 has a first side wall and a second side wall, a first end of the supporting rod 3212 is located between the first side wall and the second side wall, and the first end, the first side wall and the second side wall of the supporting rod 3212 are rotatably connected; the second end of the driven rod 3211 is rotatably connected to the support body 1, the second end of the support rod 3212 is rotatably connected to the cross beam 33, and the driving rod 322 is rotatably connected to the driven rod 3211.
The first end of the driven rod 3211 and the first end of the support rod 3212 are connected by a connection structure clamped at two sides, so that when the driven rod 3211 and the support rod 3212 rotate relatively, the situation that the connecting shaft between the driven rod 3211 and the support rod 3212 is subjected to lateral shearing force is avoided, and the situation that the connecting shaft is abraded is avoided. When the driving rod 322 goes up and down, the driving rod 322 drives the driven rod 3211 to rotate, and further drives the supporting rod 3212 to rotate synchronously, and an included angle between the driven rod 3211 and the supporting rod 3212 becomes larger or smaller, so as to raise or lower the cross beam 33.
The driven rod 3211 further has a second support block at a first end thereof between the first and second sidewalls, and the support rod 3212 is rotatably supported at a first end thereof. Therefore, the supporting rod 3212 is supported by the second supporting block, so that the situation that the connecting shaft between the driven rod 3211 and the supporting rod 3212 receives lateral shearing force can be further avoided, and the service life of the lifting rod 321 is prolonged.
In some embodiments, as shown in fig. 9, the drive rod 322 includes a first powered rod 3221 and a second powered rod 3222; the first end of the first power rod 3221 and the first end of the second power rod 3222 are respectively located at two opposite sides of the driven rod 3211, the first end of the first power rod 3221, the first end of the second power rod 3222 and the driven rod 3211 are rotatably connected, and the second end of the first power rod 3221, the second end of the second power rod 3222 and the driving assembly 31 are rotatably connected.
The first power and driven rod 3211, the second power rod 3222 and the driven rod 3211 both form a herringbone structure, and the driven rod 3211 is clamped by the first power rod 3221 and the second power rod 3222, so that a situation that a connecting shaft between the first power rod 3221, the second power rod 3222 and the driven rod 3211 is subjected to a lateral shearing force is avoided, and a situation that the connecting shaft is abraded is avoided.
In other embodiments, as shown in FIG. 2, the drive rod 322 includes a first power rod 3221, a second power rod 3222, and an auxiliary rod 3223; the first end of the first power rod 3221 and the first end of the second power rod 3222 are respectively located at two opposite sides of the auxiliary rod 3223, the first end of the first power rod 3221, the first end of the second power rod 3222 and the first end of the auxiliary rod 3223 are rotatably connected, and the second end of the auxiliary rod 3223 is provided with a third side wall and a fourth side wall; the second end of the first power rod 3221, the second end of the second power rod 3222 and the driving assembly 31 are rotatably connected, the driven rod 3211 is located between the first power rod 3221 and the second power rod 3222, the driven rod 3211, the first power rod 3221 and the second power rod 3222 are rotatably connected, the supporting rod 3212 is located between the third side wall and the fourth side wall, and the supporting rod 3212, the third side wall and the fourth side wall are rotatably connected.
The first power rod 3221 and the driven rod 3211, and the second power rod 3222 and the driven rod 3211 both form an X-shaped structure, the auxiliary rod 3223 and the support rod 3212 form a λ -shaped structure, and the driven rod 3211 is clamped by the first power rod 3221 and the second power rod 3222, so that a situation that a connecting shaft between the first power rod 3221, the second power rod 3222, and the driven rod 3211 is subjected to a lateral shearing force is avoided, a situation that the connecting shaft is abraded is avoided, and the support rod 3212 is clamped by the third side wall and the fourth side wall of the auxiliary rod 3223, a situation that the connecting shaft between the third side wall, the fourth side wall, and the support rod 3212 is subjected to a lateral shearing force is avoided, and a situation that the connecting shaft is abraded is avoided.
In the embodiment of the application, at least one rotatable connection among the lifting rod, the driving rod, the supporting body, the driving assembly and the cross beam is a connecting structure in a clamping shape at two sides, so that the situation that the connecting shaft at the rotatable connection part bears lateral shearing force when the curtain sheet is folded or unfolded is avoided, the situation that the connecting bearing is abraded is avoided, the situation that the lifting frame is inclined is avoided, and the service life of the projection screen is prolonged. In addition, the rotation of the lead screw drives the conveyor belt component, so that the driving motor can be prevented from increasing the whole width of the lifting mechanism, and the miniaturization of the projection screen is facilitated.
Fig. 10 illustrates a schematic structural diagram of a laser projection apparatus according to an embodiment of the present application. As shown in fig. 10, the laser projection apparatus includes: a receiving portion 10, wherein the receiving portion 10 includes a first receiving portion 101 and a second receiving portion 102, the first receiving portion 101 has a light-transmitting area 103, and the second receiving portion 102 has an opening 104; the laser projection host 20 is located in the first accommodating portion 101, and a light beam emitted by the laser projection host 20 can penetrate through the light-transmitting area 103; in the projection screen 30 of the above embodiment, the supporting body 1 is fixed in the second accommodating portion 102, the curtain sheet 4 can be retracted into the second accommodating portion 102, or can be extended through the opening 104, and the curtain sheet 4 receives the light beam when being extended, so as to display the image.
The receiving portion 10 is a T-shaped structure, in which the length of the first receiving portion 101 is smaller than that of the second receiving portion 102, or the receiving portion 10 is a rectangular frame structure, in which the length of the first receiving portion 101 is equal to that of the second receiving portion 102
In the embodiment of the application, at least one rotatable connection between the lifting rod, the driving rod, the supporting body, the driving assembly and the beam of the projection screen is a connecting structure in a clamping shape at two sides, so that the situation that the connecting shaft at the rotatable connection part bears lateral shearing force when the curtain sheet is folded or unfolded is avoided, the situation that the connecting bearing is abraded is avoided, the situation that the lifting frame is inclined is avoided, the service life of the projection screen is prolonged, and the service life of the laser projection equipment is prolonged. In addition, since the rotation of the screw is driven by the conveyor belt assembly, it is possible to avoid the drive motor from increasing the entire width of the elevating mechanism, which contributes to the miniaturization of the projection screen and the miniaturization of the housing portion.
The above description is only illustrative of the embodiments of the present application and is not intended to limit the embodiments of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (10)
1. A projection screen, comprising:
a support body;
the curling mechanism is limited on the support body;
the lifting mechanism comprises a driving assembly, a plurality of lifting frames and a cross beam;
the driving assembly is limited on the supporting body, the lifting frame comprises a lifting rod and a driving rod, two ends of the lifting rod are respectively and rotatably connected with the supporting body and the cross beam, two ends of the driving rod are respectively and rotatably connected with the driving assembly and the lifting rod, at least one rotatable connection in the plurality of rotatable connections is a connecting structure in a clamping shape at two sides, and the driving assembly is used for driving the end part of the driving rod to move;
the first side edge of the curtain sheet is fixedly connected with the curling mechanism, the second side edge, opposite to the first side edge, of the curtain sheet is fixedly connected with the cross beam, and the curling mechanism is matched with the lifting mechanism to pack or unfold the curtain sheet.
2. A projection screen according to claim 1 wherein the side wall of the end of the first link of the rotatable connection has a first support block on which the end of the second link of the same rotatable connection is rotatably supported.
3. The projection screen of claim 1 or 2 wherein the lifting rods comprise driven rods and support rods;
the first end of the driven rod is provided with a first side wall and a second side wall, the first end of the supporting rod is positioned between the first side wall and the second side wall, and the first end of the supporting rod, the first side wall and the second side wall are rotatably connected;
the second end of the driven rod is rotatably connected with the supporting body, the second end of the supporting rod is rotatably connected with the cross beam, and the driving rod is rotatably connected with the driven rod.
4. The projection screen of claim 3 wherein the first end of the driven rod further has a second support block located between the first side wall and the second side wall, the first end of the support rod being rotatably supported on the second support block.
5. The projection screen of claim 3 wherein the drive bar comprises a first powered bar and a second powered bar;
the first end of the first power rod and the first end of the second power rod are respectively located on two sides of the driven rod, wherein the two sides are opposite to each other, the first end of the first power rod, the first end of the second power rod and the driven rod are rotatably connected, and the second end of the first power rod, the second end of the second power rod and the driving assembly are rotatably connected.
6. The projection screen of claim 3 wherein the drive bar comprises a first power bar, a second power bar, and an auxiliary bar;
the first end of the first power rod and the first end of the second power rod are respectively positioned at two opposite sides of the auxiliary rod, the first end of the first power rod, the first end of the second power rod and the first end of the auxiliary rod are rotatably connected, and the second end of the auxiliary rod is provided with a third side wall and a fourth side wall;
the second end of first power pole the second end of second power pole with drive assembly swivelling joint, the driven lever is located first power pole with between the second power pole, just the driven lever first power pole with but second power pole swivelling joint, the bracing piece is located the third lateral wall with between the fourth lateral wall, just the bracing piece the third lateral wall with but fourth lateral wall swivelling joint.
7. The projection screen of claim 1 wherein the drive assembly comprises a drive motor, a conveyor belt assembly, a lead screw, and a plurality of sliders;
the lead screw is rotatably limited on the support body, the sliding blocks are in threaded connection with the lead screw, and when the lead screw rotates, two sliding blocks in the sliding blocks are close to or far away from each other;
the output shaft of the driving motor, the conveyor belt assembly and the lead screw are sequentially in transmission connection, and the driving motor is used for driving the lead screw to rotate;
the plurality of sliding blocks are in one-to-one correspondence with the plurality of lifting frames, and the end part of the driving rod is rotatably connected with the corresponding sliding block.
8. The projection screen of claim 7, wherein the conveyor belt assembly comprises a gear box, a first pulley, a second pulley, a third pulley, a first conveyor belt, and a second conveyor belt;
the first belt wheel and the second belt wheel are rotatably fixed on the gearbox body, the first belt wheel is fixedly connected with an output shaft of the driving motor, and the third belt wheel is sleeved on the lead screw and is fixedly connected with the lead screw;
the second belt wheel is provided with a large circular groove and a small circular groove, the first belt wheel is sleeved with the large circular groove of the second belt wheel, and the second belt wheel is sleeved with the small circular groove of the second belt wheel and the third belt wheel.
9. The projection screen of claim 8, wherein the conveyor belt assembly further comprises a stop that is movably retained on the gearbox housing, the stop being capable of tensioning the first conveyor belt or the second conveyor belt.
10. A laser projection device, characterized in that the laser projection device comprises:
a receiving portion including a first receiving portion having a light transmitting region and a second receiving portion having an opening;
the laser projection host is positioned in the first accommodating part, and light beams emitted by the laser projection host can penetrate through the light-transmitting area;
the projection screen of any of claims 1-9, wherein the support is fixed in the second receptacle, the curtain sheet can be retracted into the second receptacle or extended through the opening, and the curtain sheet receives the light beam to display a picture when extended.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121316465.XU CN215769337U (en) | 2021-06-11 | 2021-06-11 | Projection screen and laser projection equipment |
| PCT/CN2022/098266 WO2022258064A1 (en) | 2021-06-11 | 2022-06-10 | Projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022258064A1 (en) * | 2021-06-11 | 2022-12-15 | 青岛海信激光显示股份有限公司 | Projection apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022258064A1 (en) * | 2021-06-11 | 2022-12-15 | 青岛海信激光显示股份有限公司 | Projection apparatus |
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