WO2022017367A1 - 激光投影设备 - Google Patents

激光投影设备 Download PDF

Info

Publication number
WO2022017367A1
WO2022017367A1 PCT/CN2021/107302 CN2021107302W WO2022017367A1 WO 2022017367 A1 WO2022017367 A1 WO 2022017367A1 CN 2021107302 W CN2021107302 W CN 2021107302W WO 2022017367 A1 WO2022017367 A1 WO 2022017367A1
Authority
WO
WIPO (PCT)
Prior art keywords
lead screw
rod
connecting shaft
laser projection
drive motor
Prior art date
Application number
PCT/CN2021/107302
Other languages
English (en)
French (fr)
Inventor
陈友才
杨长明
赵云
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010697512.3A external-priority patent/CN113960873A/zh
Priority claimed from CN202010698784.5A external-priority patent/CN113960874A/zh
Priority claimed from CN202011157998.8A external-priority patent/CN113960875A/zh
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Publication of WO2022017367A1 publication Critical patent/WO2022017367A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Definitions

  • the present application relates to the field of projection technology, and in particular, to a laser projection device.
  • Laser projection equipment usually includes a light source system, an illumination system and a lens system.
  • the light source system is used to provide a laser beam
  • the illumination system is used to modulate the laser beam into an image beam
  • the lens system is used to project the image beam onto the projection screen.
  • the application provides a laser projection device, including: an optical engine configured to emit light beams; a projection screen including a lift mechanism and a screen; the lift mechanism includes a drive mechanism and a plurality of lift frames; wherein the drive mechanism can The plurality of lifting frames are driven to rise and fall, and the plurality of lifting frames can support the curtain to unfold.
  • FIG. 1 is a schematic diagram of an unfolded structure of a projection screen of a laser projection device provided by an embodiment of the present application;
  • FIG. 2 is a schematic diagram of a retracted structure of a projection screen of a laser projection device provided by an embodiment of the present application;
  • FIG. 3 is a schematic structural diagram of a crimping mechanism provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an exploded structure of a crimping mechanism provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a clockwork device provided in an embodiment of the present application in a relaxed state
  • FIG. 6 is a schematic structural diagram of a clockwork device provided in an embodiment of the present application in a tightened state
  • FIG. 7 is a schematic structural diagram of a lifting mechanism provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a lift frame provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another lifting frame provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another lifting frame provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a driving mechanism provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another driving mechanism provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another driving mechanism provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of yet another driving mechanism provided by an embodiment of the present application.
  • 15 is a back view of a specific structure of a laser projection device provided by an embodiment of the present application.
  • Figure 16 is a partial view of the scissor bracket in Figure 15;
  • Figure 17 is an enlarged view of part B in Figure 15;
  • Fig. 18 is the exploded schematic diagram of Fig. 17;
  • FIG. 19 is an enlarged view of part A in FIG. 15 .
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present application, unless otherwise specified, "plurality” means two or more.
  • connection and its derivatives may be used.
  • the term “connected” may be used in describing some embodiments to indicate that two or more components are in direct physical or electrical contact with each other.
  • the term “connected” may also mean that two or more components are not in direct contact with each other, but yet still co-operate or interact with each other.
  • the embodiments claimed herein are not necessarily limited by the content herein.
  • FIG. 1 illustrates a schematic structural diagram of an unfolded projection screen of a laser projection device provided by an embodiment of the present application
  • FIG. 2 illustrates a structural schematic diagram of a retracted projection screen of a laser projection device provided by an embodiment of the present application
  • the laser projection apparatus includes an optical engine 1 and a projection screen 2 , wherein the projection screen 2 includes a base 21 , a curling mechanism 22 , a lifting mechanism 23 and a screen 24 .
  • the curling mechanism 22 is rotatably limited on the base 21, the lifting mechanism 23 is fixed on the base 21, the first side of the curtain 24 is fixedly connected with the curling mechanism 22, and the second side of the curtain 24 is connected with the lifting mechanism 23 is fixedly connected, the second side is opposite to the first side, the lifting mechanism 23 can control the curtain 24 to unfold, and the curling mechanism 22 can rotate along its own circumferential direction to control the curtain 24 to retract.
  • the light outlet of the optical engine 1 faces the unfolded screen 24, so that the optical engine 1 can emit a light beam to the screen 24, and the screen 24 is used for receiving the light beam to display a picture.
  • the lifting structure 23 is fixed on other fixing mechanisms, and the fixing mechanisms are fixedly connected with the base 21 .
  • the laser projection device is a laser ultra-short-focus projection device
  • the optical engine 1 included in the laser projection device is an ultra-short-focus optical engine.
  • the ultra-short-focus optical engine is a DLP (Digital Light Procession, digital light processing) optical engine. Since the optical engine 1 is an ultra-short-focus optical engine, the distance from the ultra-short-focus optical engine to the plane where the screen 24 included in the projection screen 2 is located can be set to a short distance, so as to realize the miniaturization design of the laser projection equipment.
  • the optical engine 1 includes a laser light source, a light modulation component and a projection lens, the laser light source is connected to the light modulation component, and the projection lens is connected to the light modulation component; the laser light source, the light modulation component and the projection lens are all electrically connected to an external power supply.
  • the external power supply is used to supply power to the laser light source, the light modulation component and the projection lens, so that the laser light source emits the light beam to the light modulation component.
  • the light modulation component modulates the light beam emitted by the laser light source, it is output to the projection lens, and then exits through the projection lens. to the screen 24 included in the projection screen.
  • the optical engine 1 further includes a heat dissipation component, so that the laser light source, the light modulation component and the projection lens can be dissipated through the heat dissipation component, so as to avoid the heat accumulated inside the laser light source, the light modulation component and the projection lens from causing the device temperature to be too high and affecting the device optical performance.
  • the heat dissipation components include fans, liquid cooling devices, and the like.
  • the screen 24 included in the projection screen 2 is an optical screen, such as a rollable Fresnel optical screen, or a flexible black screen.
  • the curtain film 24 has high optical gain, which can restore the brightness and contrast of the light beam as much as possible, and through the stretching of the curling mechanism 22 and the lifting mechanism 23, a higher flatness can be achieved, so that the screen of the curtain film 24 can be improved.
  • the display effect is better.
  • the optical engine 1 and the projection screen 2 included in the laser projection device are arranged in a separate manner, which facilitates the transportation of the optical engine 1 and the projection screen 2 and separate maintenance during later use. For example, after the optical engine 1 fails, it is more convenient to send the optical engine 1 for repair alone.
  • the laser projection apparatus further includes a receiving portion 3 .
  • the accommodating part 3 has a first accommodating part 31 and a second accommodating part 32; the optical engine 1 is located in the inner cavity of the first accommodating part 31, the first accommodating part 31 has a light-transmitting area 311, and the light beam emitted by the optical engine 1
  • the screen 24 included in the projection screen 2 can pass through the light-transmitting area 311 .
  • the base 21 is located in the inner cavity of the second accommodating portion 32 , the second accommodating portion 32 has an opening 321 , and the curling mechanism 22 can control the curtain 24 to pass through the opening 321 and be retracted into the inner cavity of the second accommodating portion 32 ,
  • the lifting mechanism 23 can control the curtain 24 to pass through the opening 321 and unfold.
  • the integrated arrangement of the optical engine 1 and the projection screen 2 is realized, and the optical engine 1 and the projection screen 2 are limited.
  • the relative positions of the curtains 24 included in the projection screen 2 ensure that the curtains 24 can completely receive the light beams emitted by the optical engine 1 , so as to ensure the screen display effect of the curtains 24 .
  • the vertical distance from the center point of the light-transmitting area 311 to the plane where the unfolded screen 24 is located is equal to the product of the projection ratio of the optical engine 1 and the width of the display area on the screen 24, and the width of the display area refers to the Displays the size of the area in the horizontal direction. In this way, it can be ensured that the light beam emitted by the optical engine 1 can be accurately projected onto the display area of the screen film 24 , so as to ensure the clarity of the displayed image on the screen film 24 .
  • the throw ratio of the optical engine 1 is related to the selected optical engine 1 itself, that is, different optical engines 1 may have different throw ratios, and then the center point of the light-transmitting area 311 The vertical distances to the plane in which the unfolded film 24 lies are also different.
  • the vertical distance from the center point of the light-transmitting area 311 to the plane where the unfolded screen piece 24 is located is calculated by the projection ratio of the optical engine 1 and the width of the display area, and then the vertical distance is determined as The vertical distance between the center point of the light-transmitting area 311 and the center line of the opening 321 along the length direction can ensure that the light beam emitted by the optical engine 1 can be completely projected on the display area of the screen 24 .
  • the accommodating portion 3 has a T-shaped structure, that is, the first accommodating portion 31 and the second accommodating portion 32 are connected to form a T-shaped structure, and the volume of the first accommodating portion 31 is smaller than that of the first accommodating portion 31 .
  • the volume of the two accommodating parts 32 . In this way, the space occupied by the accommodating portion 3 can be reduced, especially when the screen 24 is stowed, the space occupied by the entire laser projection apparatus can be reduced.
  • first accommodating portion 31 and the second accommodating portion 32 are detachably connected.
  • first accommodating portion 31 and the second accommodating portion 31 are detachably connected.
  • the part 32 is a non-detachable connection, that is, the first accommodating part 31 and the second accommodating part 32 are integrally connected.
  • the curling mechanism 22 includes a reel 221 , a connecting shaft 222 and a clockwork device 223 ; the first end of the connecting shaft 222 is connected to the side plate 211 of the base 21 , and the connecting shaft The second end of 222 is connected to the reel 221, the first end of the clockwork device 223 is limited on the connecting shaft 222, the second end of the clockwork device 223 is limited on the side plate 211 or the reel 221, and the curtain 24
  • the first side of the screen is fixedly connected with the reel 221, and the reel 221 can rotate under the action of the clockwork device 223 to control the curtain 24 to be retracted.
  • the pulling force of the lifting mechanism 23 on the curtain 24 drives the reel 221 to rotate, so as to drive the spring device 223 to be wound up, and store elastic potential energy at the same time
  • the pulling force of the lifting mechanism 23 to the curtain 24 is balanced with the rotational force of the clockwork device 223 to promote the rotation of the reel 221, so as to ensure that the curtain 24 remains in the unfolded state.
  • the lifting mechanism 23 is lowered, the pulling force generated by the lifting mechanism 23 on the screen 24 is reduced.
  • the rotating force of the spring device 223 to promote the rotation of the reel 221 is greater than the pulling force, and the spring device 223 releases the elastic potential energy, thereby making the winding
  • the drum 221 rotates in the opposite direction, and at this time the curtain 24 is curled on the drum 221 to realize the retraction of the curtain 24 . That is, as shown in FIG. 5 , when the curtain 24 is in a retracted state, the clockwork device 223 is in a relaxed state, and as shown in FIG. 6 , when the curtain 24 is in an unfolded state, the clockwork device 223 is in a tightened state.
  • the torsional force generated by the clockwork device 223 drives the reel 221 to rotate, so as to realize the retraction of the curtain 24.
  • the curtain 24 is electrically controlled.
  • the retracted structure not only avoids the problem that the curling mechanism 22 is provided with a curling control system, but also reduces the complexity of the curling mechanism 22, and also saves electric energy and reduces the energy consumption of the laser projection equipment.
  • the clockwork device 223 is a clockwork spring or other structure, as long as the clockwork device 223 can store elastic potential energy to generate a torsion force after rotation, the embodiment of the present application has no effect on the clockwork device 223
  • the specific structure is not limited.
  • the first end of the clockwork device 223 is extended with an extension along a direction perpendicular to its own axial direction, and the connecting shaft 222 has a slot, so that the extension of the first end of the clockwork device 223 is extended.
  • the part extends into the slot on the connecting shaft 222 to realize the limit of the spring device 223 along its own circumferential direction.
  • the first end of the clockwork device 223 is directly fixed on the connecting shaft 222 by screws or other methods, as long as the first end of the clockwork device 223 can be limited, which is not limited in the embodiment of the present application.
  • the clockwork device 223 is connected between the connecting shaft 222 and the drum 221, and the connecting shaft 222 and the side plate 211 are relatively fixed along the circumferential direction of the connecting shaft 222; or the clockwork device 223 is connected between the connecting shaft 222 and the side plate 211. Between the side plates 211 , the connecting shaft 222 and the reel 221 are relatively fixed along the circumferential direction of the connecting shaft 222 .
  • the clockwork device 223 is connected between the connecting shaft 222 and the reel 221 .
  • the first end of the connecting shaft 222 is limited to the side plate 211 along its own circumferential direction.
  • the second end of the connecting shaft 222 is connected with the reel 221 , and the reel 221 can rotate relative to the connecting shaft 222 , and the second end of the clockwork device 223 is limited on the reel 221 .
  • the first end of the connecting shaft 222 is fixedly connected with the side plate 211, so as to realize the limit of the connecting shaft 222 relative to the side plate 211 along its own circumferential direction, so as to prevent the winding drum 221 from driving the clockwork device When 223 is tightened, the synchronous rotation of the connecting shaft 222 occurs.
  • the first end of the connecting shaft 222 has a protrusion with a polygonal cross section
  • the side plate 211 has a limit hole matching the protrusion
  • the protrusion is located in the limit hole.
  • the cross section of the protrusion is one of triangle, quadrangle and hexagon.
  • the cross section of the protrusion can also be other shapes, such as an ellipse, etc., as long as the limit hole and the protrusion can be matched to avoid synchronous rotation of the connecting shaft 222, which is not limited in the embodiments of the present application.
  • the outer diameter of the connecting shaft 222 is smaller than the outer diameter of the reel 221.
  • the end of the reel 221 or the whole of the reel 221 is hollow, so that the second end of the connecting shaft 222 can be or the outer diameter of the connecting shaft 222 is larger than the outer diameter of the connecting shaft 221, and the second end of the connecting shaft 222 is hollow, so that the end of the reel 221 can extend into the second end of the connecting shaft 222. two ends.
  • the clockwork device 223 When the second end of the connecting shaft 222 extends into the reel 221, the clockwork device 223 is sleeved on the connecting shaft 222. At this time, the inner end of the clockwork device 223 is limited to the connecting shaft 222, and the outer end of the clockwork device 223 is limited to the connecting shaft 222. The position is limited on the reel 221 .
  • the inner end of the clockwork device 223 is the first end of the clockwork device 223
  • the outer end of the clockwork device 223 is the second end of the clockwork device 223 .
  • the inner end of the mainspring device 223 is limited to the reel 221, and the mainspring device 223
  • the outer end is limited on the connecting shaft 222 .
  • the outer end of the clockwork device 223 is the first end of the clockwork device 223
  • the inner end of the clockwork device 223 is the second end of the clockwork device 223 .
  • the fixing method between the second end (outer end) of the clockwork device 223 and the reel 221 is the same as the first end (inner end) of the clockwork device 223 described above It is the same or similar to the fixing method between the connecting shafts 222 .
  • the fixing method between the second end (outer end) of the clockwork device 223 and the reel 221 is different from the fixing method between the first end (inner end) of the clockwork device 223 and the connecting shaft 222 described above .
  • the curling mechanism 22 further includes a first spring seat 224 .
  • the first spring seat 224 is sleeved on the clockwork device 223 and is fixedly connected with the reel 221 . The two ends are limited on the first spring seat 224 .
  • the first spring seat 224 is directly and fixedly connected to the reel 221 , or the first spring seat 224 is indirectly and fixedly connected to the reel 221 .
  • the fixing screw is directly connected to the circumferential surface of the first spring seat 224 through the wall of the drum 221 .
  • the first spring seat 224 has a baffle plate, and the baffle plate is sleeved on the connecting shaft 222, so that the spring device 223 can be limited by the baffle plate, so as to prevent the spring device 223 from being wound up or When slackened, the spring mechanism 223 may tilt in the axial direction.
  • the curling mechanism 22 further includes a spring cover 225 , the spring cover 225 is sleeved on the connecting shaft 222 and is fixedly connected with the first spring seat 224 , and the spring cover 225 It is used to limit the position of the spring device 223 in the axial direction of the connecting shaft 222 .
  • the first spring seat 224 includes a baffle plate
  • the spring cover 225 and the baffle plate of the first spring seat 224 can limit both sides of the clockwork device 223 at the same time, so that the clockwork device 223 can be better positioned at the same time.
  • the position is limited in the axial direction to avoid possible inclination of the mainspring device 223 in the axial direction.
  • the crimping mechanism 22 further includes a support body, the support body is sleeved on the connecting shaft 222, and the reel 221 is sleeved on the support body, so that when the reel 221 rotates relative to the connecting shaft 222, the support body can pass through the support body.
  • the body forms support for the reel 221 to avoid the possibility of the reel 221 shaking in the radial direction.
  • the support body is a bearing 226
  • the inner circle of the bearing 226 is fixedly connected with the second end of the connecting shaft 222
  • the outer circle of the bearing 226 is fixedly connected with the inner wall of the drum 221 . In this way, the bearing 226 can not only support the reel 221 , but also reduce the frictional force when the reel 221 rotates relative to the connecting shaft 222 .
  • the first spring seat 224 is fixedly connected to the outer circumference of the bearing 226 , thereby realizing the indirect fixed connection between the first spring seat 224 and the reel 221 .
  • the clockwork device 223 is connected between the connecting shaft 222 and the side plate 211 .
  • the first end of the connecting shaft 222 is connected to the side plate 211 , and the connecting shaft 222 can rotate relative to the side plate 211 , the second end of the clockwork device 223 is limited on the side plate 211 , and the second end of the connecting shaft 222 It is limited on the reel 221 along its own circumferential direction.
  • the first end of the connecting shaft 222 is connected with the side plate 211 through a bearing, so as to realize the rotation of the connecting shaft 222 relative to the side plate 211 .
  • the first end of the connecting shaft 222 is fixedly connected with the inner circle of the bearing, and the side plate 211 is fixedly connected with the outer circle of the bearing; or the first end of the connecting shaft 222 is fixedly connected with the outer circle of the bearing, and the side plate 211 is fixedly connected with the bearing.
  • the inner circle is fixedly connected.
  • the inner circle of the bearing is sleeved on the first end of the connecting shaft 222, and the inner circle of the bearing is fixedly connected with the outer wall of the connecting shaft 222, that is, the inner circle of the bearing is fixedly connected with the connecting shaft 222;
  • the outer circle is matched with the fixing hole, the bearing is located in the fixing hole, and the outer circle of the bearing is fixedly connected with the inner wall of the fixing hole, that is, the outer circle of the bearing is fixedly connected with the side plate 211 .
  • the first end of the connecting shaft 222 can also be connected to the side plate 211 in other ways to realize the rotation of the connecting shaft 222 relative to the side plate 211 , which is not limited in the present application.
  • the end surface of the first end of the connecting shaft 222 is circular
  • the fixing hole is a cylindrical hole, so that the connecting shaft 222 and the side plate 211 are in contact with the cylindrical surface to ensure that the connecting shaft 222 can rotate relative to the side plate 211 .
  • a lubricating member is provided between the side wall of the first end of the connecting shaft 222 and the hole wall of the fixing hole, so as to reduce the frictional force when the connecting shaft 222 rotates relative to the side plate 211 through the lubricating member .
  • the lubricating member is a ball
  • the hole wall of the fixing hole has a ring of lubricating grooves
  • the balls are arranged in the lubricating groove
  • the side wall of the first end of the connecting shaft 222 is in contact with the balls.
  • the side plate 211 has a certain thickness
  • the fixing hole has a certain depth
  • the clockwork device 223 is sleeved on the connecting shaft 222 and partially extends into the fixing hole, thereby connecting the second end of the clockwork device 223 It is limited on the inner wall of the fixing hole, that is, the second end of the clockwork device 223 is limited on the side plate 211 .
  • the limiting manner between the second end of the clockwork device 223 and the inner wall of the fixing hole is the same or similar to the connection manner between the first end of the clockwork device 223 and the connecting shaft 222 described above, which is not limited in the embodiments of the present application. .
  • the limiter can also be fixed on the side plate 211, and then the second end of the clockwork device 223 can be limited by the limiter.
  • the limiting member is a limiting block, and the limiting block has a slot with the same thickness as the thickness of the second end of the clockwork device 223, so that the second end of the clockwork device 223 is inserted into the slot to realize the adjustment of the clockwork The limit of the second end of the device 223 .
  • the manner in which the second end of the connecting shaft 222 is limited relative to the reel 221 is the same as or similar to the manner in which the first end of the connecting shaft 222 is limited on the side plate 211 described above. This embodiment is not repeated here.
  • the curling mechanism 22 further includes a second spring seat, the second spring seat is sleeved on the clockwork device 223 and is fixedly connected with the side plate 211 , and the second end of the clockwork device 223 is limited to the second on the spring seat.
  • the second spring seat is directly and fixedly connected to the side plate 211 , or the second spring seat is indirectly and fixedly connected to the side plate 211 .
  • it is directly and fixedly connected to the side surface of the second spring seat through fixing screws through the cylindrical wall of the side plate 211 .
  • the connecting shaft 222 is connected to the side plate 211 through the bearing
  • the second spring seat is fixedly connected to the outer circle of the bearing 226 , thereby realizing the indirect fixed connection between the second spring seat and the side plate 211 .
  • the second spring seat has a baffle
  • the baffle is sleeved on the connecting shaft 222
  • the clockwork device 223 is located between the baffle and the side plate 211 .
  • the baffle plate of the second spring seat and the side plate 211 can jointly limit the two sides of the clockwork device 223 to avoid possible inclination of the clockwork device 223 in the axial direction.
  • the lifting mechanism 23 includes a driving mechanism 231 , a plurality of lifting frames 232 and a beam 233 ; the driving mechanism 231 is fixed on the base 21 , and the plurality of lifting frames 232 are connected to the driving mechanism 231 .
  • the plurality of lifting frames 232 are also connected to the beam 233, the second side of the screen 24 is fixedly connected to the beam 233, the driving mechanism 231 can drive the plurality of lifting frames 232 to rise and fall synchronously, and the plurality of lifting frames 232 can support the beam. 233 to show opening film 24.
  • At least one scissor lift frame 232 is included in the plurality of lift frames 232 .
  • the plurality of lifting frames 232 are all scissor-shaped lifting frames 232 , and the plurality of lifting frames 232 are symmetrical with respect to the left and right central axes of the curtain film 24 .
  • the driving mechanism 231 drives the plurality of scissor-shaped lifting frames 232 to move up and down synchronously, and then the beams 233 are supported by the plurality of scissor-shaped lifting frames 232. Since the scissor-shaped lifting frame 232 has the advantage of higher stability, the cross beam 233 can be more stably supported by the plurality of scissor-shaped lifting frames 232 to unfold the curtain sheet 24 .
  • the scissor lift frame 232 includes a first link 2321 and a second link 2322; the first link 2321 and the second link 2322 are rotatably connected, in a possible
  • the first link 2321 is rotatably connected to the middle position of the second link 2322; the first end of the first link 2321 is connected to the driving mechanism 231, and the second end of the first link 2321 is connected to the beam 233
  • the first end of the second link 2322 is connected to the base 21 , and the first link 2321 can cooperate with the second link 2322 to support the beam 233 under the action of the driving mechanism 231 .
  • the first connecting rod 2321 and the second connecting rod 2322 are both straight rods.
  • the second ends of the first link 2321 and the second link 2322 are rotatably connected, and the first link 2321 and the second link 2322 are in an inverted y-shaped structure. At this time, when the first link 2321 supports the beam 233, the second link 2322 can support the first link 2321, thereby ensuring the stability of the beam 233 when the beam 233 is lifted.
  • the first link 2321 and the second link 2322 are located on the back of the screen 24 included in the projection screen 2, and at the same time, in order to ensure stable support for the beam 233, for example, the second link
  • the length of the first link 2322 is equal to half of the length of the first link 2321 , and the second end of the second link 2322 is rotatably connected to the midpoint of the first link 2321 .
  • the second end of the first link 2321 and the end of the beam 233 are rotatably connected, and the line between the second end of the first link 2321 and the first end of the second link 2322 is parallel to the vertical direction .
  • first link 2321 and the second link 2322 are in an x-shaped structure.
  • the second end of the second link 2322 is slidably connected to the beam, so that when the curtain sheet 24 is unfolded, with the rotation of the second link 2322, the The second end moves toward the second end of the first link 2321 until the curtain 24 is unfolded.
  • the second end of the first link 2321 and the second end of the second link 2322 support the beam 233 at the same time, so as to provide multiple support points for the beam 233 to ensure the stability of the support of the beam 233 .
  • the first link 2321 and the second link 2322 are located at the back of the screen 24 included in the projection screen 2, and at the same time, in order to ensure stable support for the beam 233, for example, the second link
  • the length of the rod 2322 is equal to the length of the first link 2321
  • the midpoint of the second link 2322 is rotatably connected to the midpoint of the first link 2321 .
  • the second end of the first link 2321 is rotatably connected to the end of the beam 233, the line between the second end of the first link 2321 and the first end of the second link 2322, and the first link
  • the straight lines where the first end of the second link 2321 and the second end of the second link 2322 are located are both parallel to the vertical direction.
  • first link 2321 and the second link 2322 can be directly connected to the beam 233 to support the beam 233 .
  • first link 2321 and the second link 2322 can also be indirectly connected to the beam 233 to support the beam 233 .
  • the scissor lift frame 232 includes a driving rod 2323 , a driven rod 2324 , an auxiliary rod 2325 and a supporting rod 2326 .
  • the first end of the driving rod 2323 is connected with the driving mechanism 231, the first end of the driven rod 2324 is rotatably connected with the base 21, the driving rod 2323 and the driven rod 2324 are rotatably connected, and have an x-shaped structure; the driving rod 2323 The second end of the auxiliary rod 2325 is rotatably connected with the first end of the auxiliary rod 2325, the second end of the driven rod 2324 is rotatably connected with the first end of the support rod 2326, and the driving rod 2323 can drive the driven rod under the action of the driving structure 231.
  • the support rod 2326 and the auxiliary rod 2325 are used to cooperate to support the beam 233 .
  • the active rod 2323 corresponds to the first link 2321
  • the driven rod 2324 corresponds to the second link 2322.
  • the active rod 2323 and the driven rod 2324 are connected to the beam 233 through the auxiliary rod 2325 and the support rod 2326 to support the beam.
  • 233 which is equivalent to the above-mentioned indirect connection with the beam 233 through the first link 2321 and the second link 2322 , so as to support the beam 233 .
  • the driving mechanism 231 drives the first end of the driving rod 2323 to move toward the first end of the driven rod 2324 .
  • the driving rod 2323 pushes the driven rod 2324 to rotate, while the second end of the driving rod 2323 drives the auxiliary rod 2325 to rotate, and when the driven rod 2324 rotates, it drives the supporting rod 2326 to rotate until The support rod 2326 and the auxiliary rod 2325 cooperate to support the cross beam 233 .
  • the driving mechanism 231 drives the first end of the driving rod 2323 to move away from the first end of the driven rod 2324 .
  • the active rod 2323 drives the driven rod 2324 to reversely rotate, while the active rod 2323 drives the auxiliary rod 2325 to reversely rotate, and when the driven rod 2324 reversely rotates, it drives the support rod 2326 to reversely rotate Rotate until beam 233 is retracted.
  • the second end of the auxiliary rod 2325 is rotatably connected to the support rod 2326 , and the auxiliary rod 2325 and the support rod 2326 are in an inverted Y-shaped structure, in a possible implementation manner , the second end of the auxiliary rod 2325 is connected with the non-end of the support rod 2326 .
  • the auxiliary rod 2325 can support the support rod 2326, so as to ensure the stability of the support rod 233 when the beam 233 is supported.
  • the active rod 2323, the driven rod 2324, the auxiliary rod 2325, and the supporting rod 2326 are located on the back of the screen 24 included in the projection screen 2, and at the same time, in order to ensure the stable support of the beam 233, for example, , the length of the driving rod 2323 is equal to the length of the driven rod 2324, and the midpoint position of the driving rod 2323 and the midpoint position of the driven rod 2324 are rotatably connected, the length of the auxiliary rod 2325 is equal to half of the length of the supporting rod 2326, and The second end of the auxiliary rod 2325 is rotatably connected with the midpoint of the support rod 2326 .
  • the second end of the support rod 2326 is rotatably connected to the end of the beam 233, and the second end of the active rod 2323, the first end of the driven rod 2324 and the second end of the support rod 2326 are located on the same straight line, and The line is parallel to the vertical direction.
  • the auxiliary rod 2325 and the support rod 2326 are in an x-shaped structure, and the second end of the auxiliary rod 2325 is connected with the beam 233 .
  • the second end of the auxiliary rod 2325 is connected with the cross beam 233 , when the curtain sheet 24 is unfolded, the second end of the auxiliary rod 2325 and the second end of the supporting rod 2326 support the cross beam 233 at the same time, so that the cross beam 233 can be provided with more a support point to ensure the stability of the support of the beam 233 .
  • the active rod 2323, the driven rod 2324, the auxiliary rod 2325, and the supporting rod 2326 are located on the back of the screen 24 included in the projection screen 2.
  • the length of the active rod 2323 is equal to the length of the driven rod 2324, and the midpoint position of the active rod 2323 and the midpoint position of the driven rod 2324 are rotatably connected
  • the length of the auxiliary rod 2325 is equal to the length of the support rod 2326
  • the auxiliary rod The midpoint position of the rod 2325 is rotatably connected to the midpoint position of the support rod 2326 .
  • the second end of the support rod 2326 is rotatably connected to the end of the beam 233, the second end of the active rod 2323, the first end of the driven rod 2324 and the second end of the support rod 2326 are located on the same straight line, and the active rod The first end of 2323, the second end of the driven rod 2324 and the second end of the auxiliary rod 2325 are located on the same straight line, and the straight lines are all parallel to the vertical direction.
  • the driven rod 2324 and the support rod 2326 are hollow, so that the power cable or the connection wire of the screen can be hidden in the driven rod 2324 and the support rod 2326 .
  • the plurality of lifting frames 232 include a first lifting frame and a second lifting frame
  • the driving mechanism 231 includes a driving motor, a rotating structure and a slider.
  • the rotating structure is a lead screw.
  • This application only describes the structure of the first lifting frame, but those skilled in the art can easily obtain the structure of the second lifting frame arranged symmetrically. Therefore, this application does not repeat the structure of the second lifting frame.
  • the driving mechanism 231 includes a first driving motor 23101 , a first lead screw 23102 , a first sliding block 23103 , and in a possible implementation manner, a second sliding block 23104 .
  • the first drive motor 23101 is fixed on the base 21 and is arranged at the left or right end of the first lead screw 23102.
  • the output shaft of the first drive motor 23101 is connected to the first lead screw 23102, and the first drive motor 23101 can drive the first lead screw 23102.
  • the screw 23102 rotates; the first screw 23102 includes two symmetrically arranged one-piece parts, wherein the first part of the first screw 23102 has a positive thread, the second part of the first screw 23102 has a reverse thread, and the first lifting frame
  • the second end of the active rod 2323 or the first link 2321 is provided with a first slider 23103, the second end of the active rod 2323 of the second lift frame or the second end of the first link 2321 is provided with a second slider 23104, the first The first link 2321 or the active rod 2323 of the lifting frame is connected with the first part of the first lead screw 23102 through the first slider 23103, and the first link 2321 or the active rod 2323 of the second lifting frame is connected with the second slider 23104.
  • the second part of the first lead screw 23102 is connected; the first lift frame engages with the first lead screw 23102 through a positive thread, the second lift frame engages with the first lead screw 23102 through a reverse thread, and the first lead screw 23102 can drive the rotation of the first lead screw 23102
  • the first lifting frame and the second lifting frame move up and down synchronously.
  • the first lift frame and the second lift frame are both the scissor lift frame 232 described above
  • the first drive motor 23101 drives the first lead screw 23102 to rotate
  • the two sliders engaged with the first lead screw 23102 simultaneously move
  • the corresponding lead screw slides under the limit, and based on the setting of the positive thread and the reverse thread, the two sliders engaged with the first lead screw 23102 approach each other or move away from each other.
  • the first lead screw 23102 drives the first lifting frame and the second lifting frame to descend synchronously to drive the beam 233 to descend;
  • the first lead screw 23102 drives the first lifting frame and the second lifting frame to rise synchronously, so as to support the beam 233 .
  • the plurality of lifting frames include a first lifting frame and a second lifting frame
  • the driving mechanism 231 includes a second driving motor 23105, a second lead screw 23106, a third lead screw 23107, The first slider 23103.
  • the second drive motor 23105 is fixed on the base 21, the second drive motor 23105 is located between the second lead screw 23106 and the third lead screw 23107, and is respectively connected with the second lead screw 23106 and the third lead screw 23107; the active rod 2323 Or the first connecting rod 2321 is connected with the second lead screw 23106 through the first slider 23103, and the second driving motor 23105 can drive the second lead screw 23106 and the third lead screw 23107 to rotate;
  • the three lead screws 23107 have reverse threads, the first lifting frame is engaged with the second lead screw 23106, and the second lifting frame is engaged with the third lead screw 23107.
  • the active rod 2323 in the second lifting frame Similarly, through the sliding block engaging with the third lead screw 23107, when the second lead screw 23106 and the third lead screw 23107 rotate, the first lifting frame and the second lifting frame can be moved up and down synchronously.
  • the second drive motor 23105 drives the second lead screw 23106 and the third lead screw 23107 to rotate
  • the second lead screw 23106 engages with the second lead screw 23106.
  • the slider and the slider engaged with the third lead screw 23107 slide synchronously under the limit of the corresponding lead screw, and based on the setting of the positive thread and the reverse thread, the slider engaged with the second lead screw 23106 and the The sliders engaged with the three lead screws 23107 are close to each other or away from each other.
  • the second lead screw 23106 and the third lead screw 23107 drive the first lifting frame and the second lifting frame to descend synchronously, to drive the beam 233 down; when the slider engaged with the second lead screw 23106 and the slider engaged with the third lead screw 23107 move away from each other, the second lead screw 23106 and the third lead screw 23107 drive the first lifting frame and the third lead screw 23107
  • the two lifting frames are raised synchronously to support the beam 233 .
  • the second driving motor 23105 is a bidirectional output shaft motor or a through-type screw motor, so that only one driving motor is needed to realize the lowering or raising of the beam 233, thereby simplifying the structure of the driving mechanism 231;
  • the second lead screw 23106 and the third lead screw 23107 can be driven by the two driving motors 23105 to rotate, the length of the lead screw can be reduced compared to the case where only the first lead screw 23102 is included.
  • the strength, straightness, processing accuracy and fixing requirements of the lead screw will also be greatly reduced, thereby reducing the cost of the lead screw.
  • the second driving motor 23105 is fixed to the middle of the base 21 in the longitudinal direction.
  • the second driving motor 23105 is fixed at the middle position of the base 21 in the length direction. In this way, the length of the base 21 can be reduced, thereby reducing the width of the projection screen 2 .
  • the plurality of lifting frames 232 include a first lifting frame and a second lifting frame
  • the driving mechanism 231 includes a third driving motor 23108 , a fourth driving motor 23109 , a fourth The lead screw 23110, the fifth lead screw 23111, the first sliding block 23103, and in a possible implementation manner, further include a second sliding block 23104.
  • the third drive motor 23108 and the fourth drive motor 23109 are fixed on the base 21, the output shaft of the third drive motor 23108 is connected with the fourth lead screw 23110, and the third drive motor 23108 can drive the fourth lead screw 23110 to rotate;
  • the output shaft of the drive motor 23109 is connected with the fifth lead screw 23111, and the fourth drive motor 23109 can drive the fifth lead screw 23111 to rotate;
  • the slider 23103 is engaged with the fourth screw 23110, the second end of the first link 2321 or the active rod 2323 of the second lifting frame is engaged with the fifth screw 23111 through the second slider 23104, the fourth screw 23110 and the second When the five screw 23111 rotates, it can drive the first lifting frame and the second lifting frame to move up and down synchronously.
  • both the first lifting frame and the second lifting frame are the scissor lifting frame 232 described above
  • the first sliding block 23103 of the first lifting frame is engaged with the fourth screw 23110
  • the second sliding block 23104 of the second lifting frame Engage with the fifth screw 23111.
  • the slider engaged with the fourth lead screw 23110 slides under the limit of the corresponding lead screw
  • the fourth drive motor 23109 drives the fifth lead screw 23111 to rotate
  • the slider engaged with the fifth lead screw 23111 slides under the limit of the corresponding lead screw.
  • the first lead screw 23102 drives the first lifting frame and the second lifting frame to descend synchronously to Drive the beam 233 to descend; when the first slider 23103 engaged with the fourth screw 23110 and the second slider 23104 engaged with the fifth screw 23111 move away from each other, the first screw 23102 drives the first lift frame and the second lift The racks are raised synchronously to support the beam 233 .
  • the third drive motor 23108 is connected to either end of the fourth lead screw 23110
  • the fourth drive motor 23109 is connected to either end of the fifth lead screw 23111 .
  • the third driving motor 23108 and the fourth driving motor 23109 are respectively fixed on both ends of the base.
  • the third driving motor 23108 and the fourth driving motor 23109 are fixed in the middle of the base.
  • the length of the lead screw can be relatively reduced by the fourth lead screw 23110 and the fifth lead screw 23111, and in the case of reducing the lead screw length, the length of the lead screw Strength, straightness, machining accuracy and fixing requirements will also be greatly reduced, thereby reducing the cost of the lead screw.
  • the lifting mechanism 23 further includes at least one first telescopic rod 234; the first ends of the at least one first telescopic rod 234 are fixedly connected to the base 21, and the at least one first telescopic rod 234 is fixedly connected to the base 21.
  • the second ends of the rods 234 are fixedly connected to the beams 233 .
  • the second end of the first telescopic rod 234 has a support plate, so as to increase the fixed area with the beam 233 through the support plate, and at the same time avoid stress concentration between the first telescopic rod 234 and the beam 233 , so as to improve the stability of the support of the beam 233 .
  • the width of the support plate is less than or equal to the width of the beam 233
  • the length of the support plate is less than or equal to half of the length of the beam 233 .
  • FIG. 17 to Figure 19 a schematic diagram of a rear installation and an enlarged view of a part of the structure of a drive motor provided by the present application.
  • the second drive motor 23105 is arranged on the fixing plate 25.
  • the fixing plate 25 is fixedly connected to the base and is arranged on the base.
  • the fixing plate 25 is a pedestal.
  • the second driving motor 23105 is arranged at the center of the fixed plate 25 in the length direction of the projection screen, and provides power for retracting and unfolding the projection screen.
  • the second driving motor 23105 is a through-type motor and can output torque in both directions.
  • the second end of the active rod 2323 is rotatably overlapped with the first end of the support rod 2326.
  • the support rod 2326 is close to the screen 23, and the active rod 2323 is located at The support rod 2326 is away from the side of the screen 23 .
  • the first end of the driven rod 2324 is connected with the base 21 , the second end of the driven rod 2324 is rotatably connected with the first end of the auxiliary rod 2325 ; the first end of the auxiliary rod 2325 is connected with the second end of the driven rod 2324 The ends are rotatably connected, the second end of the auxiliary rod 2325 is connected with the non-end of the support rod 2326, wherein the first end of the auxiliary rod 2325 has opposite first and second faces, and the second end of the driven rod 2324
  • the end clamp is between the first surface and the second surface of the auxiliary rod 2325; the first end of the support rod 2326 is rotatably overlapped with the second end of the active rod 2323, and the second end of the support rod 2326 is connected with the beam,
  • the support rod 2326 has a third surface and a fourth surface opposite to each other, and the second end of the auxiliary rod 2325 is rotatably clamped between the third surface and the fourth surface.
  • the middle position of the support rod 2326 also has a first slope 232061, so that when the screen is stowed, a part of the auxiliary rod 2325 is accommodated in the support rod 2326.
  • the stability of the lifting frame is improved by reasonably setting the clamping connection mode.
  • the second drive motor mounting bracket 23133 is disposed on the first side of the second drive motor 23105, and has a ⁇ -shaped structure, including a first part and a second part that are perpendicular to each other, wherein the first part protrudes toward the first side of the second drive motor 23105, A mounting hole is provided on it, and the second driving motor mounting bracket 23133 is fixedly connected with the fixing plate 25 through the mounting hole, so as to realize the fixing of the second driving motor 23105 .
  • the installation holes are arranged symmetrically, and the number is 2. In a possible implementation manner, the installation holes are arranged asymmetrically, and the number is 1, 3 or more, which is not limited in this application.
  • the second part of the second drive motor mounting bracket 23133 is rectangular, and is provided with a second through hole 231331.
  • the first coupling 231321 is connected to the second drive motor 23105 through the second through hole 231331.
  • the second through hole 231331 The size is to allow the first coupling 231321 to pass through, but in a possible implementation, the second part may be of other shapes, and the second through hole 231331 may be much larger than the diameter of the first coupling 231321. This does not limit.
  • the second drive motor 23105 is connected to the lead screw through a coupling.
  • the coupling includes a first coupling 231321 and a second coupling 231322.
  • the first coupling 231321 is arranged between the second drive motor 23105 and the first lead screw.
  • the second coupling 231322 is arranged between the second driving motor 23105 and the second screw fixing bracket 23141, and the second driving motor 23105 passes through the first coupling 231321 and the third screw on the first side.
  • the second drive motor 23105 is connected with the second lead screw 23106 through the second coupling 231322 on the second side, and transmits the torque of the second drive motor 23105 to the second lead screw 23106 or the third lead screw 23107 .
  • the application does not limit the type of the coupling, as long as it can achieve the function of transmitting the torque of the second driving motor 23105 to the lead screw.
  • the first coupling 231321 is also connected to the third lead screw 23107 through the first bearing 23131, and the present application does not limit the connection manner of the coupling and the lead screw.
  • the first lead screw fixing bracket 23151 is arranged on the side of the first coupling 231321 close to the third lead screw 23107, and has a T-shaped structure with a third part and a fourth part that are perpendicular to each other, wherein the third part and the fixing plate 25
  • the two ends are provided with a mounting hole
  • the first screw fixing bracket 23151 is fixedly connected to the fixing plate 25 through the mounting hole
  • the fourth part is provided with a first through hole 231511
  • the third screw 23107 passes through the A through hole 231511 is connected with the first coupling 231321.
  • the first through hole 231511 allows the third lead screw 23107 to pass through.
  • the diameter of the first through hole 231511 is larger than the circumferential diameter of the third lead screw 23107, so that the first lead screw can be fixed when the lead screw moves.
  • the bracket 23151 will not hinder the movement of the lead screw.
  • the mounting holes may be provided only on one side of the third part, and the number of mounting holes is not limited to the two described in this embodiment, which is not limited in this application.
  • the side of the fourth part away from the curtain is a circular arc edge, so that the end of the first screw fixing bracket 23151 away from the curtain better matches the appearance of the coupling.
  • the second coupling 231322 is arranged between the second driving motor 23105 and the second screw fixing bracket 23141, connects the second driving motor 23105 and the second screw 23106, and transmits the torque of the second driving motor 23105 to the second screw Bar 23106.
  • the second lead screw fixing bracket 23141 is located on the side of the second coupling 231322 close to the second lead screw 23106, and its structure and function are the same as the first lead screw fixing bracket 23151, and will not be described again.
  • the spring fixing bracket 231352 is arranged above the second drive motor 23105, at the center position of the left and right sides of the second drive motor 23105, but in a possible implementation, the spring can be arranged at other positions, which is not done in this application limit.
  • the lower part of the spring fixing bracket 231352 is in contact with the upper part of the second driving motor 23105, that is, the spring fixing bracket 231352 is mounted on the upper part of the second driving motor 23105, but in a possible implementation, the spring fixing bracket 231352 is There is a gap between the bracket 231352 and the second driving motor 23105, which is not limited in this application.
  • the spring fixing bracket 231352 is T-shaped and has a fifth part and a sixth part that are perpendicular to each other. An installation hole, through which the spring fixing bracket 231352 is fixedly connected to the fixing plate 25 .
  • the sixth part is provided with fourth through holes 2313521 in the length direction of the screen.
  • a spring support rod 231351 is installed in the fourth through hole 2313521.
  • the fourth through hole 2313521 is located in the middle of the spring support rod 231351, and the spring support rod 231351 passes through the fourth through hole, so that the fourth through hole is supported by the spring.
  • the side of the spring support rod 231351 close to the third lead screw 23107 is taken as an example for description.
  • the axial cross section of the spring support rod 231351 is circular, but in a possible implementation manner, the cross section of the spring support rod 231351 may be in other shapes such as pentagon, hexagon, etc. No restrictions.
  • the spring support rod 231351 supports the first spring 231353 and the second spring 231354, so that the first spring 231353 and the second spring 231354 can move on the spring support rod 231351. Both ends of the spring support rod 231351 are provided with third through holes 2313511, and the third through holes 2313511 penetrate the spring support rod 231351 in a direction perpendicular to the screen.
  • a pin shaft 2313512 is arranged in the third through hole 2313511, and the first spring guide cylinder 2313531 is movably connected to the spring support rod 231351 through the pin shaft 2313512.
  • the first spring guide cylinder 2313531 is a hollow cylindrical structure with oblong holes on opposite sides of the arc.
  • the oblong holes pass through the outer and inner walls of the hollow cylindrical structure to facilitate the pin shaft 2313512 to slide in the oblong hole.
  • the first spring 231353 is a compression spring, which is sleeved on the spring support rod 231351.
  • the inner diameter of the first spring guide cylinder 2313531 needs to be larger than the diameter of the spring support rod 231351, but smaller than the circumferential diameter of the first spring 231353, so that when the lifting frame is retracted, the The first spring guide cylinder 2313531 is driven to move toward the direction close to the second driving motor 23105, thereby compressing the first spring 231353, and generating a thrust from the second driving motor 23105 toward the third lead screw 23107 on the first lifting frame.
  • the functions of the spring support rod 231351, the second spring 231354 and the second spring guide cylinder 2313534 are the same as the functions of the first spring and the first spring guide cylinder 2313531. The application will not be repeated.
  • the fixing plate 25 is an L-shaped structure with a seventh part and an eighth part perpendicular to each other.
  • the seventh part is parallel to the screen, and the eighth part is located below the second driving motor 23105 .
  • the second driving motor mounting bracket 23133, the first screw fixing bracket 23151, the second screw fixing bracket 23141, and the spring fixing bracket 231352 are all fixedly connected to the seventh part through the mounting holes.
  • any one of the second drive motor mounting bracket 23133, the first screw fixing bracket 23151, the second screw fixing bracket 23141, and the spring fixing bracket 231352 can be fixed on the eighth part, This application does not limit this.
  • a third lead screw fixing bracket 237 is also provided on the side of the third lead screw 23107 away from the second driving motor 23105.
  • the structure and function of the third lead screw fixing bracket 237 are the same as those of the second lead screw fixing bracket 237
  • the structure and function of the screw fixing bracket 23141 or the first screw fixing bracket 23151 are the same, and will not be described again.
  • the end of the third lead screw 23107 away from the second drive motor 23105 is also provided with a third coupling 236.
  • the third coupling 236 is disposed between the encoder 235 and the third lead screw fixing bracket 237, and is connected with the third lead screw 23107 connection.
  • An encoder 235 is provided on the side of the third coupling 236 away from the second driving motor 23105.
  • the encoder 235 is connected with the third coupling 236 and is used to compare the motion data of the third lead screw 23107 with the height of the screen. match to obtain the height of the clip in real time through the encoder 235.
  • the first sensing device 238 is arranged on the side of the fixing frame 25 close to the third screw fixing bracket 237, and is arranged at the fixing plate on the side of the first sliding block 23103 away from the second driving motor 23105 when the projection screen is fully unfolded. Projection position on 25.
  • the first sensing device 238 may be a mechanical switch. After the mechanical switch is mechanically touched, the first lifting frame stops moving.
  • the first sensing device 238 is a mechanical switch.
  • the light-sensing device or other devices that can sense position which is not limited in this application.
  • the edge of the side of the first slider 23103 away from the second drive motor 23105 is provided with other structures, in this case, the edge of the side of the first slider 23103 away from the second drive motor 23105 is triggered
  • the first sensing device 238 stops the movement of the first lifting frame.
  • the side of the first slider 23103 close to the second drive motor 23105 is also provided with a sensing device at the projection position of the fixed plate 25 for sensing the lifting frame
  • the first slider 23103 is close to one side of the second driving motor 23105.
  • the first slider 23103 triggers the sensing device, the second drive motor 23105 stops moving, and the screen retracting process ends.
  • the first lift frame and the second lift frame are retracted at the bottom of the projection screen.
  • the first spring guide cylinder 2313531 and the second spring guide cylinder 2313534 are pushed by the pushing force to push the first spring
  • the guide cylinder 2313531 and the second spring guide cylinder 2313534 move toward the direction close to the second drive motor 23105, thereby compressing the first spring 231353 and the second spring 231354, the first spring 231353 and the second spring 231354 are compressed, and the first lifting frame is compressed.
  • a force away from the second drive motor 23105 is generated with the second lift frame.
  • the second drive motor 23105 When the projection screen is unfolded from the bottom, the second drive motor 23105 outputs torque, drives the second lead screw 23106 and the third lead screw 23107 to rotate, and then drives the active rod 2323 to move on the second lead screw 23106 or the third lead screw 23107, Thereby, the lifting frame is driven to unfold, and then the screen film is driven to rise.
  • the second driving motor 23105 starts to start, the first spring 231353 and the second spring 231354 are in a compressed state, and there is a force on the first lifting frame and the second lifting frame away from the second driving motor 23105.
  • the second driving motor 23105 cooperates with the first spring 231353 and the second spring 231354, so that the first lifting frame and the second lifting frame are lifted from the bottom;
  • the second lifting frame rises to a certain position.
  • the first spring guide cylinder 2313531 or the second spring guide cylinder 2313534 is no longer in contact with the first lifting frame and the second lifting frame, and the first spring 2313533 is in a fully deployed state, no longer A thrust is generated from the second drive motor 23105 to the third lead screw 23107, the second spring 231354 is in a fully expanded state, and no thrust from the second drive motor 23105 to the second lead screw 23106 is generated. Only under the action of the second driving motor 23105, the second lifting frame continues to move until the curtain is fully unfolded.
  • the integrated setting of the optical engine and the projection screen is realized, and the relative occurrence between the optical engine and the screen piece included in the projection screen is avoided. possibility of displacement.
  • the reel can be rotated based on the elastic potential energy stored by the spring device itself when the curtain is unfolded, thereby avoiding the possibility of setting a control system for the curling mechanism and reducing the structural complexity of the curling mechanism.
  • the waste of electric energy is avoided, and the use cost of the laser projection equipment is saved.
  • the stability of the support for the curtain when the curtain is unfolded is improved based on the stability of the scissors itself.
  • the two ends of the at least one first telescopic rod are fixedly connected with the base and the beam to avoid the possibility of the beam being inclined under the pulling force of the curtain, thereby ensuring the smoothness of the curtain after unfolding.
  • the screen display effect of the screen film is improved.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

一种激光投影设备包括：光学引擎（1），被配置为出射光束；投影屏幕（2），包括升降机构（23）和幕片（24）。升降机构（23）包括驱动机构（231）、多个升降架（232）；其中，驱动机构（231）能够驱动多个升降架（232）升降，多个升降架（232）能够支撑幕片（24）展开。

Description

激光投影设备
相关申请的交叉引用
本申请要求在2020年07月20日提交的，申请号为202010698784.5、202010697512.3、202010697465.2的中国专利，以及在2020年10月26日提交的申请号为202011157998.8中国专利申请的优先权，它们的全部内容通过引用结合在本申请中。
技术领域
本申请涉及投影技术领域，特别涉及一种激光投影设备。
背景技术
激光投影设备通常包括光源系统、照明系统和镜头系统。光源系统用于提供激光光束，照明系统用于将激光光束调制成影像光束，镜头系统用于将影像光束投射至投影屏幕上。
发明内容
本申请提供一种激光投影设备，包括：光学引擎，被配置为出射光束；投影屏幕，包括升降机构和幕片；所述升降机构包括驱动机构、多个升降架；其中，所述驱动机构能够驱动所述多个升降架升降，所述多个升降架能够支撑幕片展开。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对本申请一些实施例中所需要使用的附图作简单地介绍。然而，下面描述中的附图仅仅是本申请一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本申请实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
图1是本申请实施例提供的一种激光投影设备的投影屏幕展开结构示意图；
图2是本申请实施例提供的一种激光投影设备的投影屏幕收起结构示意图；
图3是本申请实施例提供的一种卷曲机构的结构示意图；
图4是本申请实施例提供的一种卷曲机构的爆炸结构示意图；
图5是本申请实施例提供的一种发条装置处于松弛状态的结构示意图；
图6是本申请实施例提供的一种发条装置处于旋紧状态的结构示意图；
图7是本申请实施例提供的一种升降机构的结构示意图；
图8是本申请实施例提供的一种升降架的结构示意图；
图9是本申请实施例提供的另一种升降架的结构示意图；
图10是本申请实施例提供的又一种升降架的结构示意图；
图11是本申请实施例提供的一种驱动机构的结构示意图；
图12是本申请实施例提供的另一种驱动机构的结构示意图；
图13是本申请实施例提供的又一种驱动机构的结构示意图；
图14是本申请实施例提供的再一种驱动机构的结构示意图；
图15是本申请实施例提供的一种激光投影设备的具体结构背视图；
图16是图15中剪形支架的局部图；
图17是图15中B部分的放大图；
图18是图17的爆炸示意图；
图19是图15中A部分的放大图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本申请的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第 一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“连接”及其衍伸的表达。例如，描述一些实施例时可能使用了术语“连接”以表明两个或两个以上部件彼此间有直接物理接触或电接触。然而，术语“连接”也可能指两个或两个以上部件彼此间并无直接接触，但仍彼此协作或相互作用。这里所申请的实施例并不必然限制于本文内容。
本文中“被配置为”的使用意味着开放和包容性的语言，其不排除被配置为执行额外任务或步骤的设备。
本文中，“左侧”、“右侧”、“上侧”、“下侧”、“上方”、“下方”仅指示相对位置，不能理解为绝对位置的左侧、右侧、上侧、下侧、上方、下方。
另外，“基于”的使用意味着开放和包容性，因为“基于”一个或多个所述条件或值的过程、步骤、计算或其他动作在实践中可以基于额外条件或超出所述的值。
图1示例了本申请实施例提供的一种激光投影设备的投影屏幕展开的结构示意图，图2示例了本申请实施例提供的一种激光投影设备的投影屏幕收起的结构示意图。如图1和图2所示，该激光投影设备包括光学引擎1和投影屏幕2，其中投影屏幕2包括基座21、卷曲机构22、升降机构23和幕片24。卷曲机构22可旋转的限位在基座21上，升降机构23固定在基座21上，幕片24的第一侧边与卷曲机构22固定连接，幕片24的第二侧边与升降机构23固定连接，第二侧边与第一侧边相对，升降机构23能够控制幕片24展开，卷曲机构22能够沿自身的圆周方向旋转以控制幕片24收起。光学引擎1的出光口朝向展开后的幕片24，以便于光学引擎1能够出射光束至幕片24，幕片24用于接收该光束以显示画面。在一种可能的实施方式中，升降结构23固定于其他固定机构上，所述固定机构与基座21相固定连接。
在一种可能的实施方式中，激光投影设备为激光超短焦投影设备，此时激光投影设备包括的光学引擎1为超短焦光学引擎，示例地，超短焦光学引擎为DLP(Digital Light Procession，数字光处理)光学引擎。由于光学引擎1为超短焦光学引擎，这样，超短焦光学引擎到投影屏幕2包括的幕片24所在平面的距离能够设置成较短距离，以实现激光投影设备的小型化设计。
其中，光学引擎1包括激光光源、光调制组件和投影镜头，激光光源与光调制组件连接，投影镜头与光调制组件连接；激光光源、光调制组件以及 投影镜头均与外接电源电连接。外接电源用于向激光光源、光调制组件和投影镜头供电，以使激光光源出射光束至光调制组件，在光调制组件对激光光源出射的光束进行调制后出射至投影镜头，进而通过投影镜头出射至投影屏包括的幕片24。
另外，光学引擎1还包括散热组件，以便于通过散热组件对激光光源、光调制组件和投影镜头进行散热，避免激光光源、光调制组件以及投影镜头内部聚集的热量造成器件温度过高而影响器件的光学性能。示例地，散热组件包括风扇、液冷装置等。
在一种可能的实施方式中，投影屏幕2包括的幕片24为光学幕片，比如为可卷曲的菲涅尔光学屏，或者为柔性的黑栅幕，这样的幕片24相比于传统的幕片24具有较高的光学增益，能够尽可能的还原光束的亮度和对比度，且通过卷曲机构22和升降机构23的拉伸，能够实现较高的平整度，以使得幕片24的画面显示效果更优。
在一些实施例中，激光投影设备包括的光学引擎1和投影屏幕2分体式设置，这样便于光学引擎1和投影屏幕2的搬运，以及后期使用过程中的单独维修。示例地，在光学引擎1出现故障后，能够更方便将光学引擎1单独送修。
当然，在激光投影设备的正常使用过程中，为了保证更好的投影效果，光学引擎1与投影屏幕2之间的位置相对固定，而此时为了避免光学引擎1与投影屏幕2之间相对移位的限定，在另一些实施例中，如图1或图2所示，激光投影设备还包括收纳部3。
收纳部3具有第一容置部31和第二容置部32；光学引擎1位于第一容置部31的内腔，第一容置部31具有透光区311，光学引擎1出射的光束能够透过透光区311至投影屏幕2包括的幕片24。基座21位于第二容置部32的内腔，第二容置部32具有开口321，卷曲机构22能够控制幕片24穿过开口321并收起至第二容置部32的内腔，升降机构23能够控制幕片24穿过开口321并展开。
这样，通过第一容置部31对光学引擎1的收纳，通过第二容置部32对投影屏幕2的收纳，实现了光学引擎1和投影屏幕2的一体化设置，限定了光学引擎1与投影屏幕2包括的幕片24之间的相对位置，从而保证幕片24能够完全接收光学引擎1出射的光束，以保证幕片24的画面显示效果。
其中，透光区311的中心点到展开后的幕片24所在的平面的垂直距离等于光学引擎1的投射比与幕片24上的显示区域的宽度之间的乘积，显示区域 的宽度是指显示区域沿水平方向的尺寸。这样，能够保证光学引擎1出射的光束能够精准地投射到幕片24的显示区域，以保证幕片24上显示画面的清晰性。
由于投射比是光学引擎1本身的性能参数，因此光学引擎1的投射比与选取的光学引擎1本身有关，也即是不同的光学引擎1，投射比可能不同，进而透光区311的中心点到展开后的幕片24所在的平面的垂直距离也不相同。这样，在实际设置过程中，通过光学引擎1的投射比与显示区域的宽度计算出透光区311的中心点到展开后的幕片24所在的平面的垂直距离，进而将该垂直距离确定为透光区311的中心点与开口321的沿长度方向的中心线之间的垂直距离，从而能够保证光学引擎1出射的光束能够完整的投影在幕片24的显示区域。
在一种可能的实施方式中，收纳部3呈T型结构，也即是第一容置部31和第二容置部32连接成T形结构，且第一容置部31的体积小于第二容置部32的体积。这样能够减小收纳部3所占空间，尤其是幕片24收起时，减小激光投影设备整体所占的空间。
在一种可能的实施方式中，第一容置部31与第二容置部32之间为可拆卸式连接，当然，在另一些实施例中，第一容置部31与第二容置部32为不可拆卸式连接，也即是第一容置部31与第二容置部32之间为一体式连接。
接下来对卷曲机构22进行介绍。
在一种实施例中，如图3或图4，卷曲机构22包括卷筒221、连接轴222和发条装置223；连接轴222的第一端与基座21的侧板211连接，连接轴222的第二端与卷筒221连接，发条装置223的第一端限位在连接轴222上，发条装置223的第二端限位在侧板211或卷筒221上，幕片24的第一侧边与卷筒221固定连接，卷筒221能够在发条装置223的作用下旋转，以控制幕片24收起。
本申请实施例中，在升降机构23升起以控制幕片24展开时，通过升降机构23对幕片24的拉力带动卷筒221旋转，以带动发条装置223被卷紧，同时储存弹性势能，在幕片24展开后，升降机构23对幕片24的拉力与发条装置223促使卷筒221旋转的旋转力平衡，以保证幕片24保持在展开状态。而在升降机构23降下时，升降机构23对幕片24产生的拉力减小，此时发条装置223促使卷筒221旋转的旋转力大于该拉力，发条装置223释放弹性势能，从而使得卷筒221反向旋转，此时幕片24卷曲在卷筒221上，以实现幕片24的收起。也即是，如图5所示，幕片24处于收起状态时，发条装置223 处于松弛状态，如图6所示，幕片24处于展开状态时，发条装置223处于旋紧状态。
本申请实施例中，在升降机构23降下时，通过发条装置223所产生的扭转力带动卷筒221旋转，从而实现幕片24的收起，这样相对于相关技术中通过电动控制幕片24收起的结构，不仅避免了卷曲机构22设置卷曲控制系统的问题，降低了卷曲机构22的复杂度，还节省了电能，降低了激光投影设备的能耗。
在一种可能的实施方式中，发条装置223为发条弹簧或者其他结构，只要发条装置223在旋转后能够储存弹性势能以产生扭转力即可，本申请实施例对发条装置223的具体结构不进行限定。
在一种可能的实施方式中，发条装置223第一端沿与自身的轴向垂直的方向均延伸有延伸部，连接轴222具有卡槽，这样将发条装置223的第一端的延伸部伸入连接轴222上的卡槽，以实现对发条装置223沿自身的圆周方向实现的限位。或者发条装置223的第一端直接通过螺钉固定在连接轴222上等其他方式，只要能够对发条装置223的第一端进行限位即可，本申请实施例对此不做限定。
本申请实施例中，发条装置223连接在连接轴222与卷筒221之间，连接轴222与侧板211沿连接轴222的圆周方向相对固定；或者发条装置223连接在连接轴222与侧板211之间，连接轴222与卷筒221沿连接轴222的圆周方向相对固定。
在一些实施例中，如图3所示，发条装置223连接在连接轴222与卷筒221之间，此时，连接轴222的第一端沿自身的圆周方向限位在侧板211上，连接轴222的第二端与卷筒221连接，且卷筒221相对连接轴222能够旋转，发条装置223的第二端限位在卷筒221上。
在一种可能的实施方式中，连接轴222的第一端与侧板211固定连接，以实现连接轴222沿自身的圆周方向相对侧板211的限位，从而避免卷筒221带动发条装置223收紧时，连接轴222发生的同步旋转。
当然，如图4所示，连接轴222的第一端具有横截面为多边形的凸起，侧板211具有与凸起匹配的限位孔，凸起位于限位孔内。这样，通过限位孔对凸起的限位，实现连接轴222沿自身的圆周方向相对侧板211的限位，从而避卷筒221带动发条装置223收紧时，连接轴222发生的同步旋转。
其中，凸起的横截面为三角形、四边形、六边形中的一种。当然凸起的横截面也可以为其他形状，比如椭圆形等，只要能够通过限位孔和凸起的配 合，避免连接轴222发生同步旋转即可，本申请实施例对此不做限定。
在一种可能的实施方式中，连接轴222的外径小于卷筒221的外径，此时卷筒221的端部或者卷筒221整体为空心设置，以便于连接轴222的第二端能够伸入卷筒221；或者连接轴222的外径大于卷筒221的外径，此时连接轴222的第二端为空心设置，以便于卷筒221的端部能够伸入连接轴222的第二端。
当连接轴222的第二端伸入卷筒221时，发条装置223套在连接轴222上，此时发条装置223的内端限位在连接轴222上，发条装置223的外端限位在卷筒221上。其中，发条装置223的内端即发条装置223的第一端，发条装置223的外端即发条装置223的第二端。当卷筒221的端部伸入连接轴222的第二端时，发条装置223套在卷筒221上，此时发条装置223的内端限位在卷筒221上，发条装置223的外端限位在连接轴222上。其中，发条装置223的外端即发条装置223的第一端，发条装置223的内端即发条装置223的第二端。
当发条装置223套在连接轴222上时，发条装置223的第二端(外端)与卷筒221之间的固定方式与上描述的发条装置223的第一端(内端)与连接轴222之间的固定方式相同或相似。或者，发条装置223的第二端(外端)与卷筒221之间的固定方式与上描述的发条装置223的第一端(内端)与连接轴222之间的固定方式不相同。此时，如图3或图4所示，卷曲机构22还包括第一弹簧座224，第一弹簧座224套在发条装置223上，且与卷筒221固定连接，发条装置223的第二端限位在第一弹簧座224上。
其中，第一弹簧座224直接与卷筒221固定连接，或者第一弹簧座224间接与卷筒221固定连接。示例地，通过固定螺钉穿过卷筒221的筒壁与第一弹簧座224的圆周面直接固定连接。
在一种可能的实施方式中，第一弹簧座224具有挡板，挡板套在连接轴222上，这样能够通过挡板对发条装置223进行限位，避免发条装置223在卷紧或松弛时，发条装置223在轴向上可能发生的倾斜。
在一种可能的实施方式中，如图3或图4所示，卷曲机构22还包括弹簧盖225，弹簧盖225套在连接轴222上，且与第一弹簧座224固定连接，弹簧盖225用于对发条装置223在连接轴222的轴向上进行限位。而在第一弹簧座224包括挡板时，能够通过弹簧盖225和第一弹簧座224的挡板对发条装置223的两侧同时进行限位，从而能够更好的对发条装置223在轴向上进行限位，避免发条装置223在轴向上可能发生的倾斜。
在一种可能的实施方式中，卷曲机构22还包括支撑体，支撑体套在连接轴222上，卷筒221套在支撑体上，从而在卷筒221相对连接轴222旋转时，能够通过支撑体对卷筒221形成支撑，避免卷筒221在径向上发生晃动的可能。示例地，如图3或图4所示，支撑体为轴承226，轴承226的内圆与连接轴222的第二端固定连接，轴承226的外圆与卷筒221的内壁固定连接。这样，通过轴承226不仅能够对卷筒221形成支撑，还能够减小卷筒221相对连接轴222旋转时的摩擦力。
另外，在通过轴承226套在连接轴222上支撑卷筒221时，第一弹簧座224与轴承226的外圆固定连接，从而实现第一弹簧座224与卷筒221的间接固定连接。
在一种实施例中，发条装置223连接在连接轴222与侧板211之间。此时，连接轴222的第一端与侧板211连接，且连接轴222相对侧板211能够旋转，发条装置223的第二端限位在侧板211上，连接轴222的第二端沿自身的圆周方向限位在卷筒221上。
在一种可能的实施方式中，连接轴222的第一端与侧板211通过轴承连接，以便于实现连接轴222相对侧板211的旋转。示例地，连接轴222的第一端与轴承的内圆固定连接，侧板211与轴承的外圆固定连接；或者连接轴222的第一端与轴承的外圆固定连接，侧板211与轴承的内圆固定连接。
其中，轴承的内圆套在连接轴222的第一端，轴承的内圆与连接轴222的外壁固定连接，也即是轴承的内圆与连接轴222固定连接；侧板211具有与轴承的外圆匹配的固定孔，轴承位于固定孔内，轴承的外圆与固定孔的内壁固定连接，也即是轴承的外圆与侧板211固定连接。
当然，本申请实施例中，连接轴222的第一端预侧板211还能够通过其他方式连接，实现连接轴222相对侧板211的旋转，本申请对此不做限定。示例地，连接轴222的第一端的端面为圆形，固定孔为圆柱孔，这样连接轴222与侧板211之间通过圆柱面的接触，从而保证连接轴222能够相对侧板211旋转。
在一种可能的实施方式中，连接轴222的第一端的侧壁与固定孔的孔壁之间设置有润滑件，以通过润滑件减小连接轴222相对侧板211旋转时的摩擦力。示例地，润滑件为滚珠，固定孔的孔壁具有一圈润滑槽，滚珠排列在润滑槽内，连接轴222的第一端的侧壁与滚珠接触。
在一种可能的实施方式中，侧板211具有一定厚度，固定孔具有一定深度，发条装置223套在连接轴222上，且部分伸入固定孔，进而将发条装置 223的第二端限位在固定孔的内壁上，也即是将发条装置223的第二端限位在侧板211上。
其中，发条装置223的第二端与固定孔的内壁的限位方式沿上述描述的发条装置223的第一端与连接轴222的连接方式相同或相似，本申请实施例对此不在限定。
当然，本申请实施例中，还能够通过在侧板211固定限位件，进而通过限位件对发条装置223的第二端进行限位。示例地，限位件为限位块，限位块具有厚度与发条装置223的第二端的厚度相同的卡槽，这样将发条装置223的第二端伸入卡槽，实现对发条装置223的第二端的限位。
在一种可能的实施方式中，连接轴222的第二端相对卷筒221限位的方式如上述描述的连接轴222的第一端限位在侧板211上的方式相同或相似，本申请实施例对此不在赘述。
在一种实施例中，卷曲机构22还包括第二弹簧座，第二弹簧座套在发条装置223上，且与侧板211固定连接，发条装置223的第二端限位在第二弹簧座上。
其中，第二弹簧座直接与侧板211固定连接，或者第二弹簧座间接与侧板211固定连接。示例地，通过固定螺钉穿过侧板211的筒壁与第二弹簧座的侧面直接固定连接。或者在连接轴222通过轴承与侧板211连接时，第二弹簧座与轴承226的外圆固定连接，从而实现第二弹簧座与侧板211的间接固定连接。
在一种可能的实施方式中，第二弹簧座具有挡板，挡板套在连接轴222上，发条装置223位于挡板和侧板211之间。这样，能够通过第二弹簧座的挡板和侧板211共同对发条装置223的两侧进行限位，以避免发条装置223在轴向上可能发生的倾斜。
接下来对升降机构23进行介绍。
在一种实施例中，如图7所示，升降机构23包括驱动机构231、多个升降架232和横梁233；驱动机构231固定在基座21上，多个升降架232均与驱动机构231连接，多个升降架232还均与横梁233连接，幕片24的第二侧边与横梁233固定连接，驱动机构231能够驱动多个升降架232同步升降，多个升降架232能够撑起横梁233以展开幕片24。
在一种可能的实施方式中，多个升降架232中包括至少一个剪形升降架232。示例地，多个升降架232均为剪形升降架232，且多个升降架232关于幕片24的左右的中心轴线对称。这样，在控制幕片24展开时，通过驱动机 构231驱动多个剪形升降架232同步升降，进而通过多个剪形升降架232撑起横梁233。由于剪形升降架232具有稳定性更高的优点，从而通过多个剪形升降架232能够更稳定的撑起横梁233以展开幕片24。
在一些实施例中，如图8所示，剪形升降架232包括第一连杆2321和第二连杆2322；第一连杆2321与第二连杆2322可旋转连接，在一种可能的实施方式中，第一连杆2321与第二连杆2322的中间位置可旋转的连接；第一连杆2321的第一端与驱动机构231连接，第一连杆2321的第二端与横梁233连接，第二连杆2322的第一端与基座21连接，第一连杆2321能够在驱动机构231的作用下配合第二连杆2322撑起横梁233。其中，第一连杆2321和第二连杆2322均为直杆。
在一种可能的实施方式中，第一连杆2321与第二连杆2322的第二端可旋转连接，且第一连杆2321与第二连杆2322呈倒立的y形结构。此时，在第一连杆2321撑起横梁233时，第二连杆2322能够对第一连杆2321形成支撑，从而保证横梁233撑起时的稳定性。
而为了提高激光投影设备的美观性，第一连杆2321和第二连杆2322位于投影屏幕2包括的幕片24的背面，同时为了保证对横梁233的稳定支撑，示例地，第二连杆2322的长度等于第一连杆2321的长度的一半，且第二连杆2322的第二端与第一连杆2321的中点位置可旋转连接。此时，第一连杆2321的第二端与横梁233的端部可旋转连接，且第一连杆2321的第二端与第二连杆2322的第一端所在的直线与竖直方向平行。
在一种可能的实施方式中，第一连杆2321和第二连杆2322呈x形结构。
在一种可能的实施方式中，第二连杆2322的第二端与横梁可滑动的连接，这样，在展开幕片24时，随着第二连杆2322的旋转，第二连杆2322的第二端向靠近第一连杆2321的第二端移动，直至幕片24展开。此时，第一连杆2321的第二端和第二连杆2322的第二端同时撑起横梁233，从而能够为横梁233提供多个支撑点，以保证横梁233支撑的稳定性。
另外，为了提高激光投影设备的美观性，第一连杆2321和第二连杆2322位于投影屏幕2包括的幕片24的背面，同时为了保证对横梁233的稳定支撑，示例地，第二连杆2322的长度等于第一连杆2321的长度，且第二连杆2322的中点位置与第一连杆2321的中点位置可旋转连接。此时，第一连杆2321的第二端与横梁233的端部可旋转连接，第一连杆2321的第二端与第二连杆2322的第一端所在的直线，以及第一连杆2321的第一端和第二连杆2322的第二端所在的直线均与竖直方向平行。
需要说明的是，对于上述实施例描述的剪形升降架232的结构，能够通过第一连杆2321和第二连杆2322与横梁233直接连接，以撑起横梁233。当然也能够通过第一连杆2321和第二连杆2322与横梁233间接连接，以撑起横梁233。
在一种实施例中，如图9或图10所示，剪形升降架232包括主动杆2323、从动杆2324、辅助杆2325和支撑杆2326。
主动杆2323的第一端与驱动机构231连接，从动杆2324的第一端与基座21可旋转连接，主动杆2323和从动杆2324可旋转连接，且呈x形结构；主动杆2323的第二端与辅助杆2325的第一端可旋转连接，从动杆2324的第二端与支撑杆2326的第一端可旋转连接，主动杆2323能够驱动结构231的作用下带动从动杆2324转动；支撑杆2326的第二端与横梁233可旋转连接，辅助杆2325与支撑杆2326可旋转连接，支撑杆2326和辅助杆2325用于配合撑起横梁233。
其中，主动杆2323相当于第一连杆2321，从动杆2324相当于第二连杆2322，主动杆2323和从动杆2324通过辅助杆2325和支撑杆2326与横梁233连接，以撑起横梁233，也即是相当于上述描述的通过第一连杆2321和第二连杆2322与横梁233间接连接，以撑起横梁233。
这样，在控制幕片24展开时，驱动机构231驱动主动杆2323的第一端向靠近从动杆2324的第一端移动。在主动杆2323的第一端移动时，主动杆2323推动从动杆2324转动，同时主动杆2323的第二端带动辅助杆2325转动，而在从动杆2324转动时带动支撑杆2326转动，直至支撑杆2326和辅助杆2325配合撑起横梁233。在控制幕片24收起时，驱动机构231驱动主动杆2323的第一端向远离从动杆2324的第一端移动。在主动杆2323的第一端移动时，主动杆2323带动从动杆2324反向旋转，同时主动杆2323带动辅助杆2325反向旋转，而从动杆2324反向转动时带动支撑杆2326反向旋转，直至横梁233收起。
在一种实施例中，如图9所示，辅助杆2325的第二端与支撑杆2326可旋转连接，且辅助杆2325和支撑杆2326呈倒立的y形结构，在一种可能的实施方式中，辅助杆2325的第二端与支撑杆2326的非端部连接。此时，在支撑杆2326撑起横梁233时，辅助杆2325能够对支撑杆2326形成支撑，从而保证横梁233撑起时的稳定性。
而为了提高激光投影设备的美观性，主动杆2323、从动杆2324、辅助杆2325、支撑杆2326位于投影屏幕2包括的幕片24的背面，同时为了保证对 横梁233的稳定支撑，示例地，主动杆2323的长度等于从动杆2324的长度，且主动杆2323的中点位置与从动杆2324的中点位置可旋转连接，辅助杆2325的长度等于支撑杆2326的长度的一半，且辅助杆2325的第二端与支撑杆2326的中点位置可旋转连接。此时，支撑杆2326的第二端与横梁233的端部可旋转连接，且主动杆2323的第二端、从动杆2324的第一端和支撑杆2326的第二端位于同一直线，且所在直线与竖直方向平行。
在一种实施例中，如图10所示，辅助杆2325和支撑杆2326呈x形结构，辅助杆2325的第二端与横梁233连接。
由于辅助杆2325的第二端与横梁233连接，这样，在展开幕片24时，辅助杆2325的第二端和支撑杆2326的第二端同时撑起横梁233，从而能够为横梁233提供多个支撑点，以保证横梁233支撑的稳定性。
另外，为了提高激光投影设备的美观性，主动杆2323、从动杆2324、辅助杆2325、支撑杆2326位于投影屏幕2包括的幕片24的背面，同时为了保证对横梁233的稳定支撑，示例地，主动杆2323的长度等于从动杆2324的长度，且主动杆2323的中点位置与从动杆2324的中点位置可旋转连接，辅助杆2325的长度等于支撑杆2326的长度，且辅助杆2325的中点位置与支撑杆2326的中点位置可旋转连接。此时，支撑杆2326的第二端与横梁233的端部可旋转连接，主动杆2323的第二端、从动杆2324的第一端和支撑杆2326的第二端位于同一直线，主动杆2323的第一端、从动杆2324的第二端和辅助杆2325的第二端位于同一直线，且所在直线均与竖直方向平行。
在一种可能的实施方式中，从动杆2324和支撑杆2326为空心设置，这样，屏幕的电源线或连接线能够隐藏在从动杆2324和支撑杆2326中。
在一些实施例中，多个升降架232包括第一升降架和第二升降架，驱动机构231包括驱动电机、旋转结构和滑块，在一些实施例中，旋转结构为丝杠。
本申请仅以第一升降架的结构进行描述，但是，本领域的技术人员可以容易的得到对称设置的第二升降架的结构，因此，本申请不对第二升降架的结构进行赘述。
如图11所示，驱动机构231包括第一驱动电机23101、第一丝杠23102、第一滑块23103，在一种可能的实施方式中，还包括第二滑块23104。第一驱动电机23101固定在基座21上，设置于第一丝杠23102的左端或者右端，第一驱动电机23101的输出轴与第一丝杠23102连接，第一驱动电机23101能 够带动第一丝杠23102旋转；第一丝杠23102包括对称设置的一体式的两部分，其中，第一丝杠23102的第一部分具有正螺纹，第一丝杠23102的第二部分具有反螺纹，第一升降架的主动杆2323或第一连杆2321的第二端设置有第一滑块23103，第二升降架的主动杆2323或者第一连杆2321的第二端设置有第二滑块23104，第一升降架的第一连杆2321或者主动杆2323通过第一滑块23103与第一丝杠23102的第一部分连接，第二升降架的第一连杆2321或者主动杆2323通过第二滑块23104与第一丝杠23102的第二部分连接；第一升降架通过正螺纹与第一丝杠23102啮合，第二升降架通过反螺纹与第一丝杠23102啮合，第一丝杠23102旋转时能够带动第一升降架和第二升降架同步升降。
当第一升降架和第二升降架均为上述描述的剪形升降架232时，第一驱动电机23101带动第一丝杠23102旋转时，与第一丝杠23102啮合的两个滑块同时在对应的丝杠的限位下滑动，且基于正螺纹和反螺纹的设置，与第一丝杠23102啮合的两个滑块相互靠近或者相互远离。
当与第一丝杠23102啮合的两个滑块相互靠近时，第一丝杠23102带动第一升降架和第二升降架同步下降，以带动横梁233下降；当与第一丝杠23102啮合的两个滑块相互远离时，第一丝杠23102带动第一升降架和第二升降架同步升起，以撑起横梁233。
这样，对于上述描述的驱动机构231，仅需要一个驱动电机，即可实现横梁233的下降或升起，从而简化了驱动机构231的结构。
在一种实施例中，如图12所示，多个升降架包括第一升降架和第二升降架，驱动机构231包括第二驱动电机23105、第二丝杠23106、第三丝杠23107、第一滑块23103。第二驱动电机23105固定在基座21上，第二驱动电机23105位于第二丝杠23106与第三丝杠23107之间，分别与第二丝杠23106和第三丝杠23107连接；主动杆2323或者第一连杆2321通过第一滑块23103与第二丝杠23106连接，第二驱动电机23105能够带动第二丝杠23106和第三丝杠23107旋转；第二丝杠23106具有正螺纹，第三丝杠23107具有反螺纹，第一升降架与第二丝杠23106啮合，第二升降架与第三丝杠23107啮合，在一种可能的实施方式中，第二升降架中的主动杆2323同样通过滑块与第三丝杠23107啮合，第二丝杠23106和第三丝杠23107旋转时能够带动第一升降架和第二升降架同步升降。
当第一升降架和第二升降架均为上述描述的剪形升降架232时，第二驱动电机23105带动第二丝杠23106和第三丝杠23107旋转时，与第二丝杠23106 啮合的滑块，以及与第三丝杠23107啮合的滑块同步在对应的丝杠的限位下滑动，且基于正螺纹和反螺纹的设置，与第二丝杠23106啮合的滑块，以及与第三丝杠23107啮合的滑块相互靠近或者相互远离。
当与第二丝杠23106啮合的滑块和与第三丝杠23107啮合的滑块相互靠近时，第二丝杠23106和第三丝杠23107带动第一升降架和第二升降架同步下降，以带动横梁233下降；当与第二丝杠23106啮合的滑块和与第三丝杠23107啮合的滑块相互远离时，第二丝杠23106和第三丝杠23107带动第一升降架和第二升降架同步升起，以撑起横梁233。
其中，第二驱动电机23105为双向输出轴电机或者为贯通式丝杠电机，这样仅需要一个驱动电机，即可实现横梁233的下降或升起，从而简化了驱动机构231的结构；另外在第二驱动电机23105即可带动第二丝杠23106和第三丝杠23107旋转的情况下，相对于上述只包括的第一丝杠23102的情况，能够降低丝杠的长度。而在降低丝杠长度的情况下，丝杆的强度、直线度、加工精度和固定的要求等也都会大大降低，从而降低丝杠的成本。第二驱动电机23105固定在基座21在长度方向的中部。示例地，第二驱动电机23105固定在基座21在长度方向的中间位置。这样能够减小基座21的长度，从而减小投影屏幕2的宽度。
在一种实施例中，如图13或图14所示，多个升降架232包括第一升降架和第二升降架，驱动机构231包括第三驱动电机23108、第四驱动电机23109、第四丝杠23110、第五丝杠23111、第一滑块23103，在一种可能的实施方式中，还包括第二滑块23104。
第三驱动电机23108和第四驱动电机23109固定在基座21上，第三驱动电机23108的输出轴与第四丝杠23110连接，第三驱动电机23108能够带动第四丝杠23110旋转；第四驱动电机23109的输出轴与第五丝杠23111连接，第四驱动电机23109能够带动第五丝杠23111旋转；第一升降架中的第一连杆2321或者主动杆2323的第二端通过第一滑块23103与第四丝杠23110啮合，第二升降架的第一连杆2321或主动杆2323的第二端通过第二滑块23104与第五丝杠23111啮合，第四丝杠23110和第五丝杠23111旋转时能够带动第一升降架和第二升降架同步升降。
当第一升降架和第二升降架均为上述描述的剪形升降架232时，第一升降架的第一滑块23103与第四丝杠23110啮合，第二升降架的第二滑块23104与第五丝杠23111啮合。这样，第三驱动电机23108带动第四丝杠23110旋转时，与第四丝杠23110啮合的滑块在对应的丝杠的限位下滑动，第四驱动 电机23109带动第五丝杠23111旋转时，与第五丝杠23111啮合的滑块在对应的丝杠的限位下滑动。
第三驱动电机23108带动第四丝杠23110正转，且第四驱动电机23109带动第五丝杠23111正转时，与第四丝杠23110啮合的第一滑块23103和与第五丝杠23111啮合的第二滑块23104相互靠近；第三驱动电机23108带动第四丝杠23110反转，且第四驱动电机23109带动第五丝杠23111反转时，与第四丝杠23110啮合的第一滑块23103和与第五丝杠23111啮合的第二滑块23104相互远离。当第四丝杠23110啮合的第一滑块23103和与第五丝杠23111啮合的第二滑块23104相互靠近时，第一丝杠23102带动第一升降架和第二升降架同步下降，以带动横梁233下降；当第四丝杠23110啮合的第一滑块23103和与第五丝杠23111啮合的第二滑块23104相互远离时，第一丝杠23102带动第一升降架和第二升降架同步升起，以撑起横梁233。
其中，在一种可能的实施方式中，第三驱动电机23108与第四丝杠23110的任一端连接，第四驱动电机23109与第五丝杠23111的任一端连接。如图13所示，第三驱动电机23108和第四驱动电机23109分别固定在基座的两端。或者如图14所示，第三驱动电机23108和第四驱动电机23109固定在基座的中部。当第三驱动电机23108和第四驱动电机23109固定在基座21的中部时，能够减小基座21的长度，从而减小投影屏幕2的宽度。另外，相较于上述只包括的第一丝杠23102的情况，通过第四丝杠23110和第五丝杠23111能够相对降低丝杠的长度，而在降低丝杠长度的情况下，丝杆的强度、直线度、加工精度和固定的要求等也都会大大降低，从而降低丝杠的成本。
在一种实施例中，如图7所示，升降机构23还包括至少一个第一伸缩杆234；至少一个第一伸缩杆234的第一端均与基座21固定连接，至少一个第一伸缩杆234的第二端均与横梁233固定连接。这样，由于第一伸缩杆234的两端与基座21和横梁233均为固定连接，且不会影响横梁233的升降，从234而限定了横梁233只能在升降方向上活动，避免了横梁233发生倾斜的可能。
在一种可能的实施方式中，第一伸缩杆234的第二端具有支撑板，以通过支撑板增大与横梁233的固定面积，同时避免第一伸缩杆234与横梁233之间发生应力集中的显现，从而提高对横梁233支撑的稳定性。支撑板的宽度小于或等于横梁233的宽度，支撑板的长度小于或等于横梁233的长度的一半。
参考图17至图19，为本申请提供的一种驱动电机的背面安装示意图及部 分结构放大图。
第二驱动电机23105设置于固定板25上，在一种可能的实施方式中，固定板25与基座相固定连接，设置于基座上，在另一些可能的实施方式中，固定板25为基座。第二驱动电机23105设置于固定板25在投影屏幕长度方向的中心，为投影屏幕的收起与展开提供动力，第二驱动电机23105为贯通式电机，可以双向输出力矩。
如图16所示，第一升降架中，主动杆2323的第二端与支撑杆2326的第一端可旋转的搭接，本实施方式中，支撑杆2326靠近幕片23，主动杆2323位于支撑杆2326远离幕片23的一侧。从动杆2324的第一端与基座21连接，从动杆2324的第二端与辅助杆2325的第一端可旋转的连接；辅助杆2325的第一端与从动杆2324的第二端可旋转的连接，辅助杆2325的第二端与支撑杆2326的非端部连接，其中，辅助杆2325的第一端具有相对的第一面与第二面，从动杆2324的第二端夹持与辅助杆2325的第一面与第二面之间；支撑杆2326的第一端与主动杆2323的第二端可旋转的搭接，支撑杆2326的第二端与横梁连接，其中，支撑杆2326具有相对的第三面与第四面，辅助杆2325的第二端可旋转的夹持于第三面与第四面之间。为了在屏幕收起时外观的美观，支撑杆2326中部位置还具有第一斜面232061，使得在收起时，辅助杆2325的一部分收容于支撑杆2326内。在升降架中，通过合理的设置夹持的连接方式，提高了升降架的稳定性。
第二驱动电机安装支架23133设置于第二驱动电机23105的第一侧，呈┑形结构，包括相互垂直的第一部分与第二部分，其中第一部分向第二驱动电机23105的第一侧突出，其上设置有安装孔，第二驱动电机安装支架23133通过安装孔与固定板25相固定连接，实现对第二驱动电机23105的固定。本实施例中，安装孔对称设置，数量为2，在一种可能的实施方式中，安装孔为非对称式设置，数量为1个，3个或多个，本申请对此不做限制。第二驱动电机安装支架23133的第二部分为矩形，其上设置有第二通孔231331，第一联轴器231321穿过第二通孔231331与第二驱动电机23105连接，第二通孔231331的大小为允许第一联轴器231321通过，但在一种可能的实施方式中，第二部分可以为其他形状，第二通孔231331可以远大于第一联轴器231321的直径，本申请对此不做限制。
第二驱动电机23105通过联轴器与丝杠连接，联轴器包括第一联轴器231321与第二联轴器231322，第一联轴器231321设置于第二驱动电机23105与第一丝杠固定支架23151之间，第二联轴器231322设置于第二驱动电机 23105与第二丝杠固定支架23141之间，第二驱动电机23105在第一侧通过第一联轴器231321与第三丝杠23107连接，第二驱动电机23105在第二侧通过第二联轴器231322与第二丝杠23106相连接，将第二驱动电机23105的扭矩传递到第二丝杠23106或第三丝杠23107。本申请对联轴器的种类不做限制，只要能实现将第二驱动电机23105的扭矩传递到丝杠的作用即可。在一种可能的实施方式中，第一联轴器231321还通过第一轴承23131与第三丝杠23107连接，本申请对联轴器与丝杠的连接方式不做限制。
第一丝杠固定支架23151设置于第一联轴器231321靠近第三丝杠23107的一侧，呈T形结构，具有相互垂直的第三部分与第四部分，其中第三部分与固定板25相固定连接，两端各设置有1个安装孔，第一丝杠固定支架23151通过安装孔与固定板25相固定连接，第四部分设置有第一通孔231511，第三丝杠23107通过第一通孔231511与第一联轴器231321连接。第一通孔231511允许第三丝杠23107通过，本申请实施例中，第一通孔231511直径要大于第三丝杠23107周向的直径，这样可以在丝杠运动时，第一丝杠固定支架23151不会对丝杠的运动产生阻碍。在一种可能的实施方式中，安装孔可以仅在第三部分的一侧设置，安装孔的数量不局限于本实施例所述的2个，本申请对此不做限制。第四部分远离幕片的一侧为圆弧形边缘，使得第一丝杠固定支架23151远离幕片的一端与联轴器的外观更好的匹配。
第二联轴器231322设置于第二驱动电机23105与第二丝杠固定支架23141之间，连接第二驱动电机23105与第二丝杠23106，将第二驱动电机23105的扭矩传递至第二丝杠23106。
第二丝杠固定支架23141位于第二联轴器231322靠近第二丝杠23106的一侧，其结构与作用与第一丝杠固定支架23151相同，不再次赘述。
弹簧固定支架231352设置于第二驱动电机23105的上方，位于第二驱动电机23105左右两侧的中心位置，但在一种可能的实施方式中，弹簧可以设置于其他位置，本申请对此不做限制。本申请实施例中，弹簧固定支架231352的下部与第二驱动电机23105的上部接触，即，弹簧固定支架231352安装于第二驱动电机23105的上部，但在一种可能的实施方式中，弹簧固定支架231352与第二驱动电机23105之间有一间隙，本申请对此不做限制。弹簧固定支架231352呈T形，具有相互垂直的第五部分与第六部分，第六部分位于第五部分长度方向的中心位置，其中，第五部分位于第六部分两侧的区域设置有2个安装孔，弹簧固定支架231352通过该安装孔与固定板25相固定连接。第六部分在屏幕长度方向设置有第四通孔2313521。
第四通孔2313521中安装有弹簧支撑杆231351，本实施例中，第四通孔2313521位于弹簧支撑杆231351中间位置，弹簧支撑杆231351穿过第四通孔，使得第四通孔在弹簧支撑杆231351的中间位置后，使用螺钉固定弹簧支撑杆231351与弹簧固定支架231352，在一种可能的实施方式中，也可以使用其他方式固定弹簧支撑杆231351与弹簧固定支架231352，本申请对此不做限制。接下来以弹簧支撑杆231351靠近第三丝杠23107的一侧为例进行说明。本实施例中，弹簧支撑杆231351的轴向截面为圆形，但在一种可能的实施方式中，弹簧支撑杆231351的截面可以为五边形、六边形等其它形状，本申请对此不做限制。弹簧支撑杆231351对第一弹簧231353与第二弹簧231354起到支撑作用，使得第一弹簧231353与第二弹簧231354可以在弹簧支撑杆231351上移动。弹簧支撑杆231351的两端设置有第三通孔2313511，第三通孔2313511沿与幕片垂直的方向贯穿弹簧支撑杆231351。第三通孔2313511内设置有销轴2313512，通过销轴2313512将第一弹簧导向筒2313531可移动的连接于弹簧支撑杆231351上。第一弹簧导向筒2313531为中空的圆柱型结构，在相对的弧形两侧设置有长圆孔，所述长圆孔贯通中空的圆柱形结构外壁与内壁，以方便销轴2313512在长圆孔内滑动。第一弹簧231353为压簧，套在弹簧支撑杆231351上。在安装时，先将第一弹簧231353由弹簧支撑杆231351靠近第三丝杠23107的一侧套在弹簧支撑杆231351上，然后将第一弹簧导向筒2313531套在第一弹簧231353的外侧，将销轴2313512通过第一弹簧导向筒2313531上的长圆孔插入到第三通孔2313511内，完成相关结构的安装。
需要注意的是，本实施例中，第一弹簧导向筒2313531的内侧直径需要大于弹簧支撑杆231351的直径，但是要小于第一弹簧231353的周向直径，这样才能使得在升降架收起时，驱动第一弹簧导向筒2313531向靠近第二驱动电机23105的方向移动，从而压缩第一弹簧231353，对第一升降架产生由第二驱动电机23105朝向第三丝杠23107的推力。
在弹簧固定支架231352靠近第二丝杠23106的一侧中，弹簧支撑杆231351、第二弹簧231354、第二弹簧导向筒2313534的作用与第一弹簧、第一弹簧导向筒2313531的作用相同，本申请不再进行赘述。
固定板25为L形结构，具有相互垂直的第七部分与第八部分。本实施例中，第七部分与幕片相平行，第八部分位于第二驱动电机23105的下方。本实施例中，第二驱动电机安装支架23133、第一丝杠固定支架23151、第二丝杠固定支架23141、弹簧固定支架231352均通过安装孔与第七部分向固定连接。但在一种可能的实施方式中，第二驱动电机安装支架23133、第一丝杠固 定支架23151、第二丝杠固定支架23141、弹簧固定支架231352中任一者可以固定于第八部分上，本申请对此不做限制。
如图19所示，本实施例中，第三丝杠23107远离第二驱动电机23105的一侧还设置有第三丝杠固定支架237，第三丝杠固定支架237的结构与作用与第二丝杠固定支架23141或第一丝杠固定支架23151的结构与作用相同，不再次进行赘述。
第三丝杠23107远离第二驱动电机23105的一端还设置有第三联轴器236，第三联轴器236设置于编码器235与第三丝杠固定支架237之间，与第三丝杠23107连接。第三联轴器236远离第二驱动电机23105的一侧设置有编码器235，编码器235与第三联轴器236连接，用于将第三丝杠23107的运动数据与幕片的高度进行匹配，以通过编码器235实时获取幕片的高度。
第一感应装置238设置于固定架25靠近第三丝杠固定支架237的一侧，其设置的位置为当投影屏幕完全展开时，第一滑块23103远离第二驱动电机23105的一侧固定板25上的投影位置。在投影屏幕由收起状态展开时，第一滑块23103运动至第一感应装置238位置时，第一滑块23103远离第二驱动电机23105的一侧触发第一感应装置238，第一感应装置238受到触发，发出触发信号，第一升降架停止运动。在一种可能的实施方式中，第一感应装置238可以为机械开关，该机械开关受到机械碰触后，第一升降架停止运动，在一种可能的实施方式中，第一感应装置238为光感装置或为其他可以感应位置的装置，本申请对此不做限制。在一种可能的实施方式中，第一滑块23103远离第二驱动电机23105的一侧边缘设置有其他结构，这种情况下，第一滑块23103远离第二驱动电机23105的一侧边缘触发第一感应装置238，第一升降架停止运动。
在一种可能的实施方式中，在投影屏幕处于完全收起状态时第一滑块23103靠近第二驱动电机23105的一侧在固定板25的投影位置也设置有感应装置，用于感应升降架在屏幕收起状态时，第一滑块23103靠近第二驱动电机23105的一侧的位置。当投影屏幕完全收起时，第一滑块23103触发感应装置，第二驱动电机23105停止运动，屏幕收起过程结束。
当投影屏幕处于完全收起状态时，第一升降架和第二升降架收起于投影屏幕的底部，此时，第一弹簧导向筒2313531与第二弹簧导向筒2313534受到推力，推动第一弹簧导向筒2313531与第二弹簧导向筒2313534向靠近第二驱动电机23105的方向运动，从而压缩第一弹簧231353与第二弹簧231354，第一弹簧231353与第二弹簧231354受压缩，对第一升降架与第二升降架产 生远离第二驱动电机23105的力。
当投影屏幕由底部展开时，第二驱动电机23105输出力矩，驱动第二丝杠23106与第三丝杠23107旋转，进而带动主动杆2323在第二丝杠23106或第三丝杠23107上运动，从而驱使升降架展开，进而驱使幕片上升。当第二驱动电机23105开始启动时，此时，第一弹簧231353与第二弹簧231354呈压缩状态，对第一升降架与第二升降架有一远离第二驱动电机23105的力，在第一弹簧231353与第二弹簧231354的推力作用下，第二驱动电机23105与第一弹簧231353与第二弹簧231354相配合，使得第一升降架与第二升降架由底部升起；当第一升降架与第二升降架上升至一定位置，此时，第一弹簧导向筒2313531或第二弹簧导向筒2313534与第一升降架与第二升降架不再接触，第一弹簧2313533处于完全展开状态，不再产生由第二驱动电机23105向第三丝杠23107方向的推力，第二弹簧231354处于完全展开状态，不再产生由第二驱动电机23105向第二丝杠23106方向的推力，第一升降架与第二升降架仅在第二驱动电机23105的作用下，继续运动，直至幕片完全展开。
本申请实施例中，通过收纳部包括的第一容置部和第二容置部，实现了光学引擎与投影屏幕的一体化设置，避免了光学引擎与投影屏幕包括的幕片之间发生相对位移的可能。而在控制幕片卷曲收起时，能够基于幕片展开时发条装置自身储存的弹性势能促使卷筒转动，从而避免了卷曲机构设置控制系统的可能，降低了卷曲机构的结构的复杂度，同时避免了电能的浪费，节省了激光投影设备的使用成本。在控制幕片展开时，由于多个升降中包括有至少一个剪形升降架，从而基于剪形升降架自身稳定性的特点，提高了幕片展开时对幕片支撑的稳定性。另外，在幕片展开后，通过至少一个第一伸缩杆的两端与基座和横梁的固定连接，避免了横梁在幕片的拉力作用下发生倾斜的可能，从而保证幕片展开后的平整度，提高了幕片的画面显示效果。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种激光投影设备，包括：
    光学引擎，被配置为出射光束；
    投影屏幕，包括升降机构和幕片；
    所述升降机构包括驱动机构、多个升降架；
    其中，所述驱动机构能够驱动所述多个升降架升降，所述多个升降架能够支撑幕片展开。
  2. 如权利要求1所述的激光投影设备，其中，所述升降机构还包括横梁，所述升降架的一端与所述横梁连接，所述升降架包括至少一个剪形支架。
  3. 如权利要求2所述的激光投影设备，其中，所述升降架包括第一连杆与第二连杆，所述第一连杆与所述第二连杆可旋转连接。
  4. 如权利要求2所述的激光投影设备，其中，所述升降架包括主动杆、从动杆、辅助杆和支撑杆；
    所述主动杆的第一端与所述驱动机构连接，所述主动杆的第二端与所述辅助杆的第一端连接；
    所述从动杆的第二端与所述支撑杆的第一端连接；
    所述辅助杆的第一端与所述主动杆的第二端连接，所述辅助杆的第二端与所述支撑杆连接；
    所述支撑杆的第一端与所述从动杆的第二端连接，所述支撑杆的第二端与所述横梁连接。
  5. 如权利要求2所述的激光投影设备，其中，所述升降架包括主动杆、从动杆、辅助杆和支撑杆；
    所述主动杆的第一端与所述驱动机构连接，所述主动杆的第二端与所述辅助杆的第一端连接；
    所述从动杆的第二端与所述支撑杆的第一端连接；
    所述辅助杆的第一端与所述主动杆的第二端连接，所述辅助杆的第二端与所述横梁连接；
    所述支撑杆的第一端与所述从动杆的第二端连接，所述支撑杆的第二端与所述横梁连接。
  6. 如权利要求1所述的激光投影设备，其中，所述驱动机构还包括至少一个旋转结构，所述多个升降架包括第一升降架和第二升降架；所述驱动机构能够驱动所述旋转结构运动，所述旋转结构能够驱动所述升降架升降。
  7. 如权利要求6所述的激光投影设备，其中，所述旋转结构为丝杠，所述驱动机构还包括第一驱动电机和第一丝杠；
    所述第一驱动电机设置于所述第一丝杠的左端或右端，所述第一驱动电机的输出轴与所述第一丝杠连接，所述第一驱动电机能够带动所述第一丝杠旋转，所述第一丝杠旋转时能够带动所述第一升降架和所述第二升降架同步升降。
  8. 如权利要求6所述的激光投影设备，其中，所述旋转结构为丝杠，所述驱动电机包括第二驱动电机、第二丝杠和第三丝杠；
    所述第二驱动电机位于所述第二丝杠与所述第三丝杠之间，分别与所述第二丝杠和所述第三丝杠连接，所述第二驱动电机能够带动所述第二丝杠和所述第三丝杠旋转。
  9. 如权利要求8所述的激光投影设备，其中，所述第二驱动电机为贯通式丝杠电机。
  10. 如权利要求6所述的激光投影设备，其中，所述旋转结构为丝杠，所述驱动机构包括第三驱动电机、第四驱动电机、第四丝杠和第五丝杠；
    所述第三驱动电机的输出轴与所述第四丝杠连接，所述第三驱动电机能够带动所述第四丝杠旋转；所述第四驱动电机的输出轴与所述第五丝杠连接，所述第四驱动电机能够带动所述第五丝杠旋转；
    所述第一升降架与所述第四丝杠连接，所述第二升降架与所述第五丝杠连接，所述第四丝杠和所述第五丝杠旋转时能够带动所述第一升降架和所述第二升降架升降。
  11. 如权利要求1所述的激光投影设备，其中，所述投影屏幕还包括基座和卷曲机构，所述卷曲机构包括卷筒、连接轴和发条装置；
    所述连接轴的第一端与所述基座连接，所述连接轴的第二端与所述卷筒连接，所述发条装置的第一端限位在连接轴上，所述发条装置的第二端限位在所述基座或所述卷筒上，所述幕片的第一侧边与所述卷曲机构固定连接，所述卷曲机构能够沿自身的圆周方向旋转以控制所述幕片收起；所述幕片的第二侧边与所述升降机构固定连接。
  12. 如权利要求11所述的激光投影设备，其中，所述连接轴的第一端沿自身的圆周方向限位在所述基座上，所述连接轴的第二端与所述卷筒连接，且所述卷筒相对所述连接轴能够旋转，所述发条装置的第二端限位在所述卷筒上；
    所述连接轴的第二端伸入所述卷筒，所述发条装置套在所述连接轴上， 所述发条装置的内端限位在所述连接轴上，所述发条装置的外端限位在所述卷筒上。
  13. 如权利要求12所述的激光投影设备，其中，所述卷曲机构还包括：
    第一弹簧座，所述第一弹簧座套在所述发条装置上，且与所述卷筒固定连接，所述发条装置的第二端限位在所述第一弹簧座上；
    弹簧盖，所述弹簧盖套在所述连接轴上，且与所述第一弹簧座固定连接，所述弹簧盖用于对所述发条装置在所述连接轴的轴向上进行限位。
  14. 如权利要求11所述的激光投影设备，其中，所述连接轴的第一端具有横截面为多边形的凸起，所述基座上设置有侧板，所述侧板具有与所述凸起匹配的限位孔，所述凸起位于所述限位孔内。
  15. 如权利要求12所述的激光投影设备，其中，所述卷曲机构还包括轴承，所述轴承的内圆与所述连接轴的第二端固定连接，所述轴承的外圆与所述卷筒的内壁固定连接。
  16. 如权利要求11所述的激光投影设备，其中，所述连接轴的第一端与所述基座连接，且所述连接轴相对所述基座能够旋转，所述发条装置的第二端限位在所述基座上，所述连接轴的第二端沿自身的圆周方向限位在所述卷筒上。
  17. 如权利要求16所述的激光投影设备，其中，所述卷曲机构还包括第二弹簧座，所述第二弹簧座套在所述发条装置上，且与所述基座固定连接，所述发条装置的第二端限位在所述第二弹簧座上。
  18. 如权利要求17所述的激光投影设备，其中，所述第二弹簧座具有挡板，所述挡板套在所述连接轴上，所述发条装置位于所述挡板和所述基座之间。
  19. 如权利要求1所述的激光投影设备，其中，所述激光投影设备还包括基座和收纳部，所述收纳部具有第一容置部和第二容置部；
    所述光学引擎位于所述第一容置部的内腔，所述第一容置部具有透光区，所述光学引擎出射的光束能够透过所述透光区；
    所述基座位于所述第二容置部的内腔，所述第二容置部具有开口，所述升降机构能够控制所述幕片穿过所述开口并展开，以接收所述光束。
PCT/CN2021/107302 2020-07-20 2021-07-20 激光投影设备 WO2022017367A1 (zh)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN202010697512.3A CN113960873A (zh) 2020-07-20 2020-07-20 激光投影设备
CN202010698784.5A CN113960874A (zh) 2020-07-20 2020-07-20 激光投影设备
CN202010698784.5 2020-07-20
CN202010697465 2020-07-20
CN202010697465.2 2020-07-20
CN202010697512.3 2020-07-20
CN202011157998.8A CN113960875A (zh) 2020-07-20 2020-10-26 激光投影设备
CN202011157998.8 2020-10-26

Publications (1)

Publication Number Publication Date
WO2022017367A1 true WO2022017367A1 (zh) 2022-01-27

Family

ID=79728997

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/107302 WO2022017367A1 (zh) 2020-07-20 2021-07-20 激光投影设备

Country Status (1)

Country Link
WO (1) WO2022017367A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117228448A (zh) * 2023-09-22 2023-12-15 广州市创视智能设备有限公司 一种电动投影幕的钢丝重叠卷线器

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006139116A (ja) * 2004-11-12 2006-06-01 Olympus Corp 可搬型防滴スクリーン装置
JP2010128424A (ja) * 2008-12-01 2010-06-10 Seiko Epson Corp スクリーン
CN201859299U (zh) * 2010-10-29 2011-06-08 深圳市白雪投影显示技术有限公司 地拉幕
CN201892815U (zh) * 2010-10-22 2011-07-06 崔定楠 座地升降投影幕
US20120162760A1 (en) * 2010-12-23 2012-06-28 Yin-Wen Chen Portable Projection Screen
CN204065650U (zh) * 2014-04-01 2014-12-31 天津市宝晶投影器材有限公司 一种便携式投影幕
CN206115131U (zh) * 2016-09-26 2017-04-19 Tcl集团股份有限公司 幕布伸缩装置
CN206473061U (zh) * 2016-11-18 2017-09-08 Tcl集团股份有限公司 投影电视柜
CN210005849U (zh) * 2019-05-23 2020-01-31 扬州工业职业技术学院 一种便携式投影装置
CN111273511A (zh) * 2020-02-25 2020-06-12 青岛海信激光显示股份有限公司 激光投影系统、投影屏幕的上升和下降控制方法
CN112925153A (zh) * 2019-12-05 2021-06-08 青岛海信激光显示股份有限公司 激光投影设备

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006139116A (ja) * 2004-11-12 2006-06-01 Olympus Corp 可搬型防滴スクリーン装置
JP2010128424A (ja) * 2008-12-01 2010-06-10 Seiko Epson Corp スクリーン
CN201892815U (zh) * 2010-10-22 2011-07-06 崔定楠 座地升降投影幕
CN201859299U (zh) * 2010-10-29 2011-06-08 深圳市白雪投影显示技术有限公司 地拉幕
US20120162760A1 (en) * 2010-12-23 2012-06-28 Yin-Wen Chen Portable Projection Screen
CN204065650U (zh) * 2014-04-01 2014-12-31 天津市宝晶投影器材有限公司 一种便携式投影幕
CN206115131U (zh) * 2016-09-26 2017-04-19 Tcl集团股份有限公司 幕布伸缩装置
CN206473061U (zh) * 2016-11-18 2017-09-08 Tcl集团股份有限公司 投影电视柜
CN210005849U (zh) * 2019-05-23 2020-01-31 扬州工业职业技术学院 一种便携式投影装置
CN112925153A (zh) * 2019-12-05 2021-06-08 青岛海信激光显示股份有限公司 激光投影设备
CN111273511A (zh) * 2020-02-25 2020-06-12 青岛海信激光显示股份有限公司 激光投影系统、投影屏幕的上升和下降控制方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117228448A (zh) * 2023-09-22 2023-12-15 广州市创视智能设备有限公司 一种电动投影幕的钢丝重叠卷线器

Similar Documents

Publication Publication Date Title
CN110647003A (zh) 幕布升降机构及投影设备
US20210169242A1 (en) Display device and support structure thereof
US20090122400A1 (en) Portable front projection screen assemblies with flexible screens
WO2021120421A1 (zh) 激光电视机柜及投影设备
WO2022017367A1 (zh) 激光投影设备
CN112925153B (zh) 激光投影设备
WO2022078114A1 (zh) 一种投影屏幕的升降装置、投影屏幕及激光电视
CN113734910B (zh) 基座及电子装置
CN212675352U (zh) 投影设备
WO2022258064A1 (zh) 投影装置
US12055845B2 (en) Projection screen and projection apparatus
CN216901313U (zh) 投影屏幕以及投影设备
CN113641073B (zh) 投影设备
CN112925160B (zh) 激光投影设备
CN215729260U (zh) 投影设备
CN113885290A (zh) 投影设备
CN213783496U (zh) 一种投影屏幕的升降装置、投影屏幕及激光电视
CN113960875A (zh) 激光投影设备
CN113160618A (zh) 一种多媒体教学设备
CN113960874A (zh) 激光投影设备
CN113946094A (zh) 投影设备及幕片升降的方法
CN218413203U (zh) 投影屏幕
CN115268196B (zh) 投影设备
CN113867095A (zh) 投影设备及幕片升降的方法
CN112925161B (zh) 激光投影设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21845921

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21845921

Country of ref document: EP

Kind code of ref document: A1