Portable electric projection screen

Abstract

The utility model discloses a portable electric projection screen, which comprises a base, a curtain and a lifting mechanism, connecting seats are mounted at two ends of the base, loudspeakers are mounted on the connecting seats, handles are slidably connected onto the connecting seats, end covers are covered on the connecting seats, a plurality of loudspeaking holes and slots are arranged on the end covers, the loudspeaking holes are close to the loudspeakers, and the loudspeaking holes are close to the loudspeakers. The base is provided with a containing groove, a winding drum is rotationally connected into the containing groove, one end of the curtain is fixedly connected with the winding drum, the curtain penetrates out of the containing groove, the other end of the curtain is fixedly connected with a cross rod, and the lifting mechanism is movably connected into the containing groove and movably connected with the cross rod. The portable electric projection screen provided by the utility model is provided with the hidden handle and the loudspeaker, so that a user can carry the projection screen conveniently while the overall size is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of electric screens, and more particularly to a portable electric projection screen. Background Technology

[0002] Electric screens are widely used in conference presentations, multimedia teaching, and home audio-visual scenarios. Their mainstream design relies on wall-mounted installation: the box and motor assembly are anchored to the wall by pre-embedded brackets or expansion bolts, and an external audio system is used to play audio synchronously to achieve sound and picture linkage.

[0003] However, such fixed screens require simultaneous deployment of audio equipment during the installation phase. Both the screen and the audio system need to be fixed in place, which makes it impossible to flexibly adjust the equipment position according to the usage scenario and cannot meet the rapid deployment needs of temporary venues or multiple classrooms. Therefore, this application proposes a portable electric projection screen with a built-in audio system to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a portable electric projection screen with a hidden handle and speaker, which makes it easy for users to move the projection screen without affecting the overall size.

[0005] The technical solution adopted by the portable electric projection screen disclosed in this utility model is:

[0006] The device includes a base, a curtain, and a lifting mechanism. Connecting seats are installed at both ends of the base, and speakers are mounted on the connecting seats. A handle is slidably connected to the connecting seats. An end cap is provided on the connecting seats, and multiple speaker holes and slots are opened on the end caps. The speaker holes are close to the speakers. The handle retracts into the slots. A receiving groove is provided on the base, and a winding drum is rotatably connected to the receiving groove. One end of the curtain is fixedly connected to the winding drum, and the curtain extends out of the receiving groove. A crossbar is fixedly connected to the other end of the curtain. The lifting mechanism is movably connected to the receiving groove and the crossbar.

[0007] As a preferred embodiment, the connecting seat has two parallel through slots, and bolts pass through both ends of the handle, with one end of each bolt placed in one of the through slots.

[0008] As a preferred embodiment, the end cap is provided with two parallel sliding grooves, the two ends of the handle are respectively placed in the two sliding grooves for sliding contact, and the middle part of the handle is retracted into the groove.

[0009] As a preferred embodiment, the end cap has a groove, which is close to the slot.

[0010] As a preferred embodiment, the receiving slot is provided with two supports, and the two ends of the take-up drum are rotatably connected to the two supports respectively. A motor is fixedly connected to one of the supports, and the output shaft of the motor is connected to one end of the take-up drum.

[0011] As a preferred embodiment, the lifting mechanism includes two folding rods, the two ends of which are rotatably connected to the receiving groove and the crossbar, respectively. A spring is provided at the bend of the folding rod, and the two ends of the spring respectively contact the two sections of the folding rod.

[0012] The beneficial effects of the portable electric projection screen disclosed in this utility model are:

[0013] Users can pull the two handles to remove the projection screen from its slot for easy transport to other locations. In use, the screen is pulled out of its storage slot and unfolded via a lifting mechanism. Simultaneously, the projection device connects to speakers; during operation, the image is projected onto the screen, while audio is played through the speakers. The integrated speakers and concealed handles allow users to quickly and conveniently deploy the projection screen across multiple locations. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a portable electric projection screen according to the present invention.

[0015] Figure 2 This is a schematic diagram of the installation of one end cap of a portable electric projection screen according to this utility model.

[0016] Figure 3 This is a schematic diagram of the installation of one of the connectors for a portable electric projection screen according to this utility model.

[0017] Figure 4 This is a schematic diagram of the installation of another end cap of a portable electric projection screen according to this utility model.

[0018] Figure 5 This is a schematic diagram of the installation of another connector for a portable electric projection screen according to this utility model.

[0019] Figure 6 This is a cross-sectional view of the base of a portable electric projection screen according to this utility model.

[0020] Figure 7 This is a schematic diagram of the storage of a portable electric projection screen according to this utility model. Detailed Implementation

[0021] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0022] Please refer to Figures 1-5 and Figure 7 .

[0023] The present invention discloses a portable electric projection screen, including a base 1, a screen 2, and a lifting mechanism 3.

[0024] Both ends of the base 1 are fixedly installed with connecting seats 11, and a speaker 12 is fixedly installed on the connecting seats 11. The speaker 12 passes through the connecting seats 11, and the sound output area of ​​the speaker 12 faces the outside of the base 1.

[0025] Furthermore, the connecting seat 11 has two parallel through slots 111, which are located on both sides of the speaker 12. A handle 13 is slidably connected to the connecting seat 11. In this embodiment, the handle 13 is preferably C-shaped. Bolts are provided at both ends of the handle 13. One end of the bolt passes through the handle 13 and the other end of the bolt is placed in the through slot 111. The through slot 111 restricts the sliding distance of the handle 13 on the connecting seat 11, preventing the handle 13 from being completely pulled out of the base 1.

[0026] The connector 11 is covered with an end cap 14, and the end cap 14 has multiple sound holes 144. The sound holes 144 are close to the sound output area of ​​the speaker 12, so that the sound emitted by the speaker 12 can pass through the sound holes 144 to the outside of the base 1, avoiding the generation of cavity resonance.

[0027] Furthermore, the handle 13 is located between the connecting seat 11 and the end cap 14. The end cap 14 has two parallel sliding grooves 141, which are parallel to the through groove 111. The two ends of the handle 13 are respectively placed in the two sliding grooves 141 and slide in contact. The end cap 14 constrains the handle 13 to the connecting seat 11, so that the handle 13 can only slide back and forth along the through groove 111 and the sliding groove 141.

[0028] Furthermore, the end cap 14 has a groove 142, which is close to the top of the base 1. When the handle 13 slides in on the connecting seat 11, the middle part of the handle 13 is inserted into the groove 142, making the handle 13 flush with the top of the base 1 and the surface of the end cap 14. The end cap 14 has a groove 143, which in this embodiment preferably has an arc-shaped cross-section. The groove 143 is close to the groove 142, so that when the user needs to use the handle 13, the groove 143 can facilitate the user to pull the handle 13 out of the groove 142.

[0029] The handle 13, through the aforementioned C-shaped design and installation method, allows the handle 13 to slide into the connector 11 while avoiding interference with the operation of the speaker 12, thus enabling the base 1 to integrate the speaker 12 and conceal the handle 13.

[0030] One of the end caps 14 is provided with a power interface 145, a power switch 146 and a lifting switch 147 in sequence. The base 1 is provided with a circuit board. The power interface 145, the power switch 146 and the lifting switch 147 are all electrically connected to the circuit board. The circuit board is provided with a Bluetooth module. The speaker 12 is electrically connected to the circuit board. The projector is connected to the speaker 12 through the Bluetooth module to transmit audio to the speaker 12 for playback.

[0031] An end cap 15 covers the end cap 14, and the speaker hole 144, power interface 145, power switch 146 and lifting switch 147 all pass through the end cap 15.

[0032] Four feet 16 are fixedly connected to the bottom of the base 1. The four feet 16 are close to the four directions of the base 1. When the projection screen is placed on the ground, the feet 16 are in direct contact with the ground. The feet 16 can increase the friction between the base 1 and the ground.

[0033] Please refer to Figure 1 , Figure 6 and Figure 7 .

[0034] The base 1 is provided with a receiving groove, and two supports 17 are provided in the receiving groove. The supports 17 are located between two connecting seats 11. A winding drum 171 is rotatably connected in the receiving groove, and the two ends of the winding drum 171 are rotatably connected to the two supports 17 respectively.

[0035] Furthermore, a motor is fixedly connected to one of the brackets 17. The motor is electrically connected to the circuit board, and the output shaft of the motor is fixedly connected to one end of the winding drum 171. In this embodiment, the motor is preferably a brake motor, so that the output shaft of the motor has a self-locking function when it stops rotating, that is, after the power is cut off, the output shaft can be fixed at the stop angle to resist external force rotation.

[0036] One end of the curtain 2 is fixedly connected to the take-up drum 171, and a portion of the curtain 2 is rolled up on the outside of the take-up drum 171. The other end of the curtain 2 extends out of the receiving groove, and a crossbar 21 is fixedly connected to the other end of the curtain 2.

[0037] The lifting mechanism 3 is movably connected to the receiving slot and the crossbar 21. The lifting mechanism 3 includes two symmetrical folding rods 31. In this embodiment, the folding rod 31 is preferably a two-section folding structure, so that there is only one bend on the folding rod 31. The two ends of the folding rod 31 are rotatably connected to the receiving slot and the crossbar 21 respectively. The bends of the two folding rods 31 are close to each other, but the two folding rods 31 do not interfere with each other when the folding rod 31 is folded.

[0038] Furthermore, a spring is provided at the bend of the folding rod 31, with the two ends of the spring contacting the two sections of the folding rod 31 respectively, and the spring pushes the two sections of the folding rod 31 to unfold it.

[0039] Please refer to Figure 1-7 .

[0040] Users can pull the handle 13 out of the slot 142 by moving it through the groove 143, so that users can lift the projection screen and move it to other places by using the two handles 13. After it is placed on the ground, the handle 13 is pushed into the slot 142 to achieve hidden storage and reduce the size.

[0041] The external power cord is electrically connected to the power interface 145. Turning on the power switch 146 activates the power supply circuit of the circuit board. Flipping the lifting switch 147 triggers the circuit board to output a forward rotation drive signal to the motor, causing the motor's output shaft to drive the winding wheel to rotate forward and release the screen 2. The folding rod 31 unfolds under the push of the spring, pushing the crossbar 21 to rise and unfold the screen 2. The motor stops after rotating the output shaft to a predetermined angle, thus maintaining the unfolded area of ​​the screen 2. The projector is connected to the speaker 12 via a Bluetooth module. When working, the image of the projector is projected onto the screen 2 for display, and the audio is played through the speaker 12. Through the collaborative design of the integrated speaker 12 and the hidden handle 13, the need for external speakers is eliminated while simplifying the handling operation.

[0042] When storage is required, the lifting switch 147 is activated to trigger the circuit board to output a reverse drive signal to the motor. The output shaft drives the winding wheel to reverse and retract the curtain 2. The curtain 2 pulls the horizontal bar 21 down and pushes the folding rod 31 to fold, compressing the spring in sync. After the output shaft stops, the self-locking mechanism is activated to prevent the spring from rebounding and unfolding. Finally, the horizontal bar 21 is completely retracted into the storage slot to complete the storage.

[0043] This invention provides a portable electric projection screen. Users can pull it out of its slot by pulling two handles to move it to other locations. In use, the screen is pulled out of its storage slot and unfolded via a lifting mechanism. Simultaneously, the projection device is connected to a speaker; during operation, the image is projected onto the screen, and the audio is played through the speaker. The integrated speaker and concealed handles allow users to quickly and conveniently deploy the projection screen across multiple locations.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A portable electric projection screen, characterized in that, include The base has connecting seats installed at both ends, a speaker is installed on the connecting seat, a handle is slidably connected to the connecting seat, an end cover is provided on the connecting seat, the end cover has multiple sound holes and slots, the sound holes are close to the speaker, the handle is retracted into the slot, and the base has a receiving groove in which a winding drum is rotatably connected. A curtain, one end of which is fixedly connected to a take-up drum, the curtain passing through a receiving groove, and the other end of which is fixedly connected to a crossbar; A lifting mechanism is movably connected to the receiving slot and movably connected to the crossbar.

2. A portable electric projection screen as described in claim 1, characterized in that, The connector has two parallel through slots, and bolts pass through both ends of the handle, with one end of each bolt placed in one of the through slots.

3. A portable electric projection screen as described in claim 2, characterized in that, The end cap has two parallel sliding grooves, and the two ends of the handle are respectively placed in the two sliding grooves for sliding contact, and the middle part of the handle is retracted into the groove.

4. A portable electric projection screen as described in claim 3, characterized in that, The end cap has a groove, which is close to the slot.

5. A portable electric projection screen as described in claim 4, characterized in that, The receiving slot is provided with two supports. The two ends of the take-up drum are rotatably connected to the two supports respectively. A motor is fixedly connected to one of the supports, and the output shaft of the motor is connected to one end of the take-up drum.

6. A portable electric projection screen as described in claim 5, characterized in that, The lifting mechanism includes two folding rods, the two ends of which are rotatably connected to the receiving groove and the crossbar, respectively. A spring is provided at the bend of the folding rod, and the two ends of the spring respectively contact the two sections of the folding rod.

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