CN210155508U

CN210155508U - Projection screen

Info

Publication number: CN210155508U
Application number: CN201921133727.1U
Authority: CN
Inventors: 张照强
Original assignee: HANGZHOU MAIJIE EDUCATIONAL TECHNOLOGY Co Ltd
Current assignee: HANGZHOU MAIJIE EDUCATIONAL TECHNOLOGY Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-03-17
Anticipated expiration: 2029-07-18

Abstract

The utility model relates to a projection arrangement especially relates to a projection screen. An object of the utility model is to provide a projection screen, include: the base is detachably connected with the upper cover; the reel is connected to the base; one end of the projection screen is connected with the upper cover, and the other end of the projection screen is connected with the scroll; and when the supporting piece is used, one end of the supporting piece is connected with the base, and the other end of the supporting piece is connected with the upper cover. One end of the projection screen is arranged on the scroll in the base, and the other end of the projection screen is connected with the upper cover, so that the projection screen can be opened by pulling up the upper cover when in use, and can be retracted and wound on the scroll when not in use, thereby reducing the volume of the projection screen, being convenient to carry and use; the support supports the upper cover so as to support the projection screen and prevent the projection screen from being accidentally retracted during use.

Description

Projection screen

Technical Field

The present disclosure relates to projection screens, and particularly to a projection screen.

Background

At present, the traditional projection screen is usually a curtain which is usually fixedly installed in a classroom, a meeting room and the like, but with the development of society and the popularity of shared economy, more and more people prefer to rent projection equipment for use, and the traditional projection screen is usually fixedly installed, is inconvenient to carry and is inconvenient to use.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a projection screen which is small in size, convenient to carry and convenient to use.

The purpose of the invention is realized by adopting the following technical scheme:

a projection screen, comprising: the base is detachably connected with the upper cover; the reel is connected to the base; one end of the projection screen is connected with the upper cover, and the other end of the projection screen is connected with the scroll; and when the supporting piece is used, one end of the supporting piece is connected with the base, and the other end of the supporting piece is connected with the upper cover.

Preferably, a fixed shaft is arranged at one end of the base, the fixed shaft is connected with an elastic part, the scroll is sleeved on the elastic part and matched with the elastic part, and the scroll can rotate and move axially relative to the elastic part; a clamping seat is arranged at one end of the base, clamping teeth matched with the clamping seat are arranged at one end of the scroll, when the clamping teeth are clamped on the clamping seat, the scroll is in a fixed state, and when the clamping teeth are separated from the clamping seat, the scroll is in a movable state; when the reel and the base are unlocked and locked by the buckle and move along the axial direction, the elastic piece generates axial elastic force, and when the reel rotates, the elastic piece generates circumferential elastic force.

Preferably, a clamping groove is formed in the fixed shaft, and the elastic part is provided with a limiting part accommodated in the clamping groove.

Preferably, the support member comprises a first part and a second part, one end of the first part is rotatably connected with one end of the second part, a locking member is arranged at the joint of the first part and the second part, the other end of the first part is rotatably connected with the base, and the other end of the second part is rotatably connected with the upper cover.

Preferably, the second part is provided with a stop block at one end connected with the first part, and the stop block abuts against the first part when the support member is in the vertical state.

Preferably, the second part is further provided with a protrusion at an end connected to the first part, and the end of the first part connected to the second part is provided with a groove matching the protrusion, the protrusion being received in the groove when the support is in an upright position.

Preferably, the supporting member at least comprises a first part and a second part, one end of the first part is sleeved with one end of the second part, a locking member is arranged at the joint of the first part and the second part, when the supporting member is used, the other end of the first part is connected with the base, and the other end of the second part is connected with the upper cover.

Preferably, one end of the reel is provided with a switch extending through one end of the base.

Preferably, the upper cover is provided with a clamping piece, one end of the projection screen is connected with the clamping piece, the clamping piece comprises a first pressing plate and a second pressing plate, a gap is formed between the first pressing plate and the second pressing plate, a resisting part is arranged at the end part of the projection screen, and the projection screen extends through the gap and is pressed on the first pressing plate and the second pressing plate by the resisting part.

Preferably, an accommodating cavity is formed between the first pressing plate and the upper cover, a limiting part is arranged on the base, and when the upper cover is abutted against the base for connection, the limiting part is accommodated in the accommodating cavity.

Compared with the prior art, the invention has the beneficial effects that:

according to the projection screen provided by the invention, one end of the projection screen is arranged on the scroll in the base, and the other end of the projection screen is connected with the upper cover, so that the projection screen can be opened by pulling up the upper cover when in use, and can be retracted and wound on the scroll when not in use, thereby reducing the volume of the projection screen, being convenient to carry and use; the support supports the upper cover so as to support the projection screen and prevent the projection screen from being accidentally retracted during use.

Drawings

FIG. 1 is a schematic view of a projection screen according to an embodiment of the present invention, wherein the projection screen is not fully opened;

FIG. 2 is a schematic view of a projection screen according to an embodiment of the present invention, wherein the projection screen is not fully opened;

FIG. 3 is a cross-sectional view of one embodiment of a projection screen of the present invention;

FIG. 4 is a schematic view of a projection screen according to an embodiment of the present invention;

FIG. 5 is a schematic view of a projection screen according to an embodiment of the present invention, wherein the projection screen is not fully opened;

FIG. 6 is an exploded view of one embodiment of a projection screen of the present invention.

In the figure: 10. an upper cover; 11. a clamping member; 111. a first platen; 112. a second platen; 12. a bump; 20. a base; 21. a fixed shaft; 211. a card slot; 22. an elastic member; 221. a limiting member; 23. a clamping seat; 24. a limiting part; 25. accommodating grooves; 30. a reel; 31. clamping teeth; 32. a switch; 40. a projection screen; 41. a resisting part; 50. a support member; 51. a first portion; 511. a groove; 52. a second portion; 521. a limiting block; 522. a convex portion; 53. and a locking member.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying drawings, in which the description of the invention is given by way of illustration and not of limitation. The various embodiments may be combined with each other to form other embodiments not shown in the following description.

Referring to fig. 1 to 6, one embodiment of the present invention provides a projection screen including a cover 10, a base 20, a scroll 30, a projection screen 40, and a support 50. The base 20 is detachably connected to the upper cover 10, and specifically, the base 20 may be snapped or inserted into the upper cover 10. The scroll 30 is connected to the base 20 and can rotate relative to the base 20, one end of the projection screen 40 is connected to the upper cover 10, and the other end is connected to the scroll 30 and wound on the scroll 30, i.e. the end of the projection screen 40 is fixed to the scroll by inserting into the scroll, and then wound on the scroll 30. One end of the projection screen 40 is connected to the upper cover 10, and the projection screen 40 moves upward along with the upper cover 10 as the upper cover 10 moves upward. Optionally, a slot may be formed in the winding shaft 30, an end portion of the projection screen 40 is provided with an end portion abutting portion, one end of the projection screen 40 enters the winding shaft 30 from the slot along the axial direction of the winding shaft 30, and the end portion abutting portion of the projection screen 40 enters the winding shaft 30 and abuts against the inner wall of the winding shaft 30, so as to prevent the end portion of the projection screen 40 from falling off the winding shaft 30.

The support member 50 is connected to the base 20 at one end and to the upper cover 10 at the other end when in use. That is, the supporter 50 has a use state in which it is used and a storage state in which it is not used, and when the supporter 50 is in the use state, one end of the supporter 50 is connected to the base 20 and the other end is connected to the upper cover 10. It should be understood that the supporting member 50 can be a single connecting rod, which can be selectively received in the base or placed at other suitable positions, and when it is desired to move the upper cover upwards to a desired position by using the projection screen, the supporting member can be connected to the upper cover and the base, respectively, in a plug-in manner, for example, the base and the upper cover are respectively provided with receiving grooves for receiving both ends of the supporting member. The supporting member 50 may also be a telescopic rod, which is extended gradually along with the rising of the upper cover to support the upper cover, and the supporting member may be directly connected to the base and the upper cover, and the upper cover is driven to extend and retract when rising, or may not be connected to the base and the upper cover, and is connected to the base and the upper cover when needed, and the supporting member of this embodiment may be selectively stored or not stored in the base. The supporting piece can also be two sections of supporting rods which are connected in a rotating mode, the supporting piece can be directly connected with the base and the upper cover, the upper cover is driven to stretch when lifted, or the supporting piece can not be connected with the base and the upper cover, and can be connected with the base and the upper cover when in use, and the supporting piece of the embodiment can be selectively stored or not stored in the base; when the supporting member is connected with the upper cover and the base, the two sections of supporting rods are respectively rotatably connected with the upper cover 10 and the base 20, and as the upper cover 10 drives the projection screen 40 to move upwards, the included angle between the two sections of supporting rods is gradually increased, and the supporting member is in a supporting state; when the support 50 is in the stowed state, it is received in the base.

According to the projection screen provided by one embodiment of the invention, one end of the projection is arranged on the scroll in the base, the other end of the projection is connected with the upper cover, the projection screen can be opened by pulling up the upper cover, and the upper cover is supported under the supporting action of the supporting piece, so that the projection screen is supported, and the projection screen can be prevented from being accidentally retracted in the using process; when the projection screen is not used, the projection screen is retracted and wound on the scroll, so that the user requirements are met, the projection screen is small in size, convenient to carry and use, and can be placed on a desk or a platform as required to be directly projected and played by digital equipment such as a mobile phone. When the projection screen needs to be folded, the scroll is rotated to wind the projection screen on the scroll, so that the scroll is folded, and the upper cover is connected to the base.

In another specific embodiment, one end of the base 20 is provided with a fixed shaft 21, the fixed shaft 21 is fixed at one end of the base 20, the fixed shaft 21 is connected with an elastic member 22, preferably, the elastic member 22 is fixedly connected to the fixed shaft 21 and distributed along the circumference of the fixed shaft, i.e. the elastic member 22 is sleeved on the fixed shaft 21 and the fixed shaft 21 is fixed. The reel 30 is sleeved on the elastic part 22 and matched with the elastic part 22, the reel 30 can axially move and rotate relative to the elastic part 22, and the elastic part 22 is elastically deformed to generate axial and circumferential pre-tightening force when the reel 30 generates friction force when axially moving and rotating relative to the elastic part 22. One end of the base 20 is provided with a clamping seat 23, and one end of the scroll 30 is provided with a latch 31 matched with the clamping seat 23; when the latch 31 is latched on the latch seat 23, the reel 30 is in a fixed state, and when the latch is disengaged from the latch seat, the reel is in a movable state; when the reel 30 moves in the axial direction to release the snap lock with the base 20, the elastic member 22 generates an axial elastic force, and the reel 30 can rotate; when the spool 30 rotates, the elastic member 22 generates a circumferential elastic force.

In another specific embodiment, one end of the reel 30 is provided with a switch 32 extending through one end of the base 20, the switch 32 can be arranged at either end of the reel 30, pulling the switch 32 to release the latch 31 of the reel 30 from the latch seat 23 of the base 20, the reel 30 moves axially, and the reel 30 can rotate after the latch is released; the switch 32 is pushed again, the reel 30 returns along the axial direction, so that the latch 31 of the reel 30 is clamped with the clamping seat 23 of the base 20, and the reel 30 is fixed. Preferably, the switch 32 is arranged at one end of the base 20 where the clamping seat 23 is arranged, an opening is arranged on the base 20, the switch 32 extends from the end of the scroll 30 through the opening of the base 20, the switch 32 is pushed inwards to release the clamping between the latch 31 of the scroll 30 and the clamping seat 23 of the base 20, the scroll 30 generates axial movement, the elastic member generates axial pre-tightening force, at this time, the upper cover 10 can be pulled to drive the projection screen 40 to move upwards, and simultaneously, the scroll 30 is driven to rotate circumferentially, and the elastic member generates circumferential pre-tightening force; under the action of the axial pretension force of the elastic element, the reel 30 generates the latch 31 which returns to the reel 30 in the axial direction to be clamped with the clamping seat 23, and the reel 30 returns to the fixed state.

Specifically, when the latch 31 is latched to the latch seat 23, the spool 30 is in a fixed state; the switch 32 is pushed, the latch 31 of the reel 30 is released from the latch locking connection with the latch seat 23 of the base 20, and the reel 30 moves along the axial direction and rubs with the elastic piece 22 to generate an axial elastic force. The scroll 30 unlocked from the position-locking seat 23 is in a free state and can rotate to open the projection screen 40, namely, the upper cover 10 is pulled to drive the projection screen 40 to move upwards, the projection screen 40 drives the scroll 30 to rotate, the scroll 30 and the elastic part 22 rub to generate circumferential elastic force, when the projection screen 40 stops rotating, the scroll 30 returns to be in buckling locking connection with the base 20 under the action of axial elastic force, the scroll 30 is prevented from continuing rotating, and at the moment, the supporting part 50 supports the upper cover 10; when the projection screen 40 needs to be retracted, the switch 32 is pushed, the reel 30 and the base 20 are unlocked and locked and connected, and move along the axial direction, the projection screen 40 is retracted to the reel 30 under the action of the circumferential elastic force, and the reel 30 is clamped with the base 20 under the action of the axial elastic force.

In another embodiment, the fixing shaft 21 is provided with a locking groove 211, and the elastic member 22 is provided with a limiting member 221 received in the locking groove 211 to prevent relative movement between the elastic member 22 and the fixing shaft 21. It should be understood that the locking slot 211 on the fixing shaft 21 may be disposed at one end of the fixing shaft 21, the end of the elastic member 22 is provided with a limiting member 221, and the limiting member 221 is locked in the locking slot 211; alternatively, the locking grooves 211 on the fixing shaft 21 are distributed along the axial direction of the fixing shaft 21, and the limiting member 221 of the elastic member 22 is fittingly received in the locking grooves 211.

In another specific embodiment, the supporting member 50 comprises a first portion 51 and a second portion 52, one end of the first portion 51 is rotatably connected with one end of the second portion 52, a locking member 53 is arranged at the connection position of the first portion 51 and the second portion 52, the other end of the first portion 51 is rotatably connected with the base 20, and the other end of the second portion 52 is rotatably connected with the upper cover 10. When the upper cover 10 is pulled to move upwards, the upper cover 10 drives the second part 52 of the support 50 to move upwards, the second part 52 drives the first part 51 to move upwards, and when the projection screen 40 is opened to a required height, the first part 51 and the second part 52 can be fixed through the locking piece 53, so that the first part 51 and the second part 52 are prevented from moving. Therefore, the user can determine the lifting height of the projection screen according to the requirement of the projection picture.

In another specific embodiment, the second portion 52 is provided with a stop block 521 and a protrusion 522 at one end connected to the first portion 51, the end of the first portion 51 connected to the second portion 52 is provided with a groove 511 matched with the protrusion 522, when the support 50 is in the vertical state, the protrusion 522 is received in the groove 511, the stop block 521 abuts against the first portion 51, the second portion 52 is prevented from further rotating, and the support 50 can be stably maintained in the vertical support state. It should be noted that the convex portion and the concave portion are matched structures, and are not limited to specific positions of the foregoing embodiment, for example, in other specific embodiments, the first portion is provided with the convex portion, and the second portion is correspondingly provided with the matched concave portion; the limiting block is not limited to be arranged on the first portion, and can also be arranged on the second portion to limit the supporting piece.

In another embodiment, one end of the roller 30 is provided with a switch 32 extending through one end of the base 20, and the switch 32 can be provided at either end of the roller 30 to unlock a retaining member secured to the support when the screen is to be retracted, and the switch 32 can be rotated to rotate the roller to wind the screen onto the roller to retract the screen and attach the cover to the base.

Or, the switch 32 is arranged at one end of the base 20 where the clamping seat 23 is arranged, an opening is arranged on the base 20, the switch 32 extends from the end of the scroll 30 to pass through the opening of the base 20, the switch 32 is pushed inwards to enable the latch 31 of the scroll 30 to be disengaged from the clamping seat 23 of the base 20, the scroll 30 moves axially, the elastic element generates axial pre-tightening force, at the moment, the upper cover 10 can be pulled to drive the projection screen 40 to move upwards, the scroll 30 is driven to rotate, the projection screen is opened, at the moment, the elastic element generates circumferential pre-tightening force, the first part and the second part of the supporting element are locked by the locking element for supporting, the scroll is engaged with the base under the action of the axial pre-tightening force of the elastic element, and the scroll is prevented; when the projection screen needs to be folded, the locking of the locking piece on the supporting piece is cancelled, the switch 32 is pulled outwards, the scroll 30 generates axial movement, the elastic piece generates axial pretightening force, the scroll reversely rotates to wind the projection screen on the scroll under the action of the circumferential pretightening force of the elastic piece, the scroll reversely moves under the action of the axial pretightening force of the elastic piece, the latch 31 of the scroll 30 is clamped with the clamping seat 23, and the scroll 30 is restored to a fixed state.

In another specific embodiment, the supporting member at least comprises a first part and a second part, one end of the first part is sleeved with one end of the second part, a locking member is arranged at the joint of the first part and the second part, when the supporting member is used, the other end of the first part is connected with the base, and the other end of the second part is connected with the upper cover. The second section is retracted within the first section when the support is in the stowed condition when not in use, and extends outwardly from within the first section for support when the support is in use; the first part and the second part are respectively connected with the base and the upper cover when in use, and can be in a connection state with the base and the upper cover or in a disconnection state when in a contraction state without use. It will be appreciated that the support member may comprise a plurality of support rods which are received within one another, the support members being arranged in a supporting configuration with the support rods extending outwardly and being arranged in a retracted configuration when not in use.

In another embodiment, the upper cover 10 is provided with a clamping member 11, and one end of the projection screen 40 is connected to the clamping member 11, that is, the end of the projection screen 40 is connected to the clamping member 11, so that the projection screen 40 can move together with the upper cover 10. The clamping member 11 includes a first pressing plate 111 and a second pressing plate 112, a gap is formed between the first pressing plate 111 and the second pressing plate 112, a resisting portion 41 is disposed at an end of the projection screen 40, and the projection screen 40 extends through the gap and the resisting portion 41 is pressed against the first pressing plate 111 and the second pressing plate 112. The end of the projection screen 40 abuts on the first pressing plate 111 and the second pressing plate 112 through the abutting portion 41, thereby realizing that the projection screen 40 can move together with the upper cover 10. Alternatively, the second portion 52 of the support bar 50 is attached to the upper cover 10 by being connected to the second pressing plate 112.

In another specific embodiment, a containing cavity is formed between the first pressing plate 111 and the upper cover 10, the base 20 is provided with a limiting portion 24, when the upper cover 10 is connected with the base 20 in an abutting manner, the limiting portion 24 is contained in the containing cavity, and the upper cover 10 is connected with the base 20 to play a role in guiding, so that the upper cover 10 can be easily installed on the base 20. The upper cover 10 is symmetrically provided with the convex blocks 12, and the base 20 is provided with accommodating grooves 25 for accommodating the convex blocks 12. When the projection screen 40 is in the retracted state, the upper cover 10 is connected to the base 20, the protrusion 12 of the upper cover 10 is received in the receiving groove 25, and the limiting portion 24 of the base 20 is received in the receiving cavity.

It should be understood that, when installed, one end of the projection screen 40 is inserted into the winding shaft 30 from one end of the base 20 and wound on the winding shaft 30, the other end of the projection screen 40 is sandwiched between the first pressing plate 111 and the second pressing plate 112, and the first pressing plate 111 and the second pressing plate 112 are fixed to the upper cover 10, and the support rods 50 are connected to the second pressing plate 112 of the upper cover 10 and the base 20, respectively, for supporting the upper cover 10.

According to the above embodiment, the switch 32 is pushed, the latch 31 of the reel 30 is unlocked from the latch seat 23 of the base 20, the reel 30 moves axially, an axial pre-tightening force is generated between the reel 30 and the elastic element 22, the upper cover 10 is pulled up, the projection screen 40 moves upwards along with the upper cover 10, the projection screen 40 drives the reel 30 to rotate, a circumferential pre-tightening force is generated between the reel 30 and the elastic element 22, and meanwhile, the support element 50 moves upwards along with the upper cover 10; when the projection screen 40 is opened to a required height, the locking piece locks the first part and the second part of the supporting piece, the scroll 30 returns to be clamped and locked with the base 20 under the action of axial pretension force, and the scroll 30 is prevented from continuing to rotate; when the projection screen 40 needs to be retracted, the locking member releases the locking of the first part and the second part of the supporting member, the switch 32 is pushed, the latch 31 of the reel 30 is unlocked from the clamping seat 23 of the base 20, the reel 30 moves axially, axial pre-tightening force is generated between the reel 30 and the elastic member 22, the reel 30 rotates reversely under the action of the circumferential pre-tightening force, the upper cover 10 is connected with the base 20, and then the reel 30 returns to the clamping state with the base 20 under the action of the axial pre-tightening force.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A projection screen, comprising:

an upper cover is arranged on the upper cover,

the base is detachably connected with the upper cover;

the reel is connected to the base;

one end of the projection screen is connected with the upper cover, and the other end of the projection screen is connected with the scroll;

and when the supporting piece is used, one end of the supporting piece is connected with the base, and the other end of the supporting piece is connected with the upper cover.

2. A projection screen according to claim 1, wherein the base has a fixed shaft at one end thereof, the fixed shaft is connected to an elastic member, the roller is sleeved on and engaged with the elastic member, and the roller can rotate and move axially relative to the elastic member; a clamping seat is arranged at one end of the base, clamping teeth matched with the clamping seat are arranged at one end of the scroll, when the clamping teeth are clamped on the clamping seat, the scroll is in a fixed state, and when the clamping teeth are separated from the clamping seat, the scroll is in a movable state; when the reel moves along the axial direction, the elastic part generates axial elastic force, and when the reel rotates, the elastic part generates circumferential elastic force.

3. A projection screen according to claim 2, wherein the stationary shaft is provided with a slot and the resilient member is provided with a stop member received in the slot.

4. A projection screen according to claim 1, wherein the support member includes a first portion and a second portion, one end of the first portion pivotally connected to one end of the second portion, and a locking member is provided at a connection between the first portion and the second portion, the other end of the first portion pivotally connected to the base, and the other end of the second portion pivotally connected to the cover.

5. A projection screen according to claim 4, wherein the second portion is provided with a stop at an end connected to the first portion, the stop abutting the first portion when the support is in the upright position.

6. A projection screen according to claim 5, wherein the second portion is further provided with a projection at the end connected to the first portion, and the end of the first portion connected to the second portion is provided with a recess matching the projection, the projection being received in the recess when the support is in the upright position.

7. A projection screen according to claim 1, wherein the support member comprises at least a first portion and a second portion, one end of the first portion and one end of the second portion are nested, and a locking member is provided at a junction of the first portion and the second portion, wherein when the support member is in use, the other end of the first portion is connected to the base, and the other end of the second portion is connected to the cover.

8. A projection screen according to any one of claims 1 to 7, wherein one end of the roller is provided with a switch extending through one end of the base.

9. The projection screen of any one of claims 1-7, wherein the top cover is provided with a clamping member, one end of the projection screen is connected to the clamping member, the clamping member comprises a first pressing plate and a second pressing plate, a gap is formed between the first pressing plate and the second pressing plate, the end of the projection screen is provided with a stopper, the projection screen extends through the gap, and the stopper is pressed against the first pressing plate and the second pressing plate.

10. The projection screen of claim 9, wherein the first pressure plate and the top cover define a receiving chamber therebetween, and the base defines a position-limiting portion that is received within the receiving chamber when the top cover and the base are in abutting engagement.