CN104181764A - Movable projector and projection screen device - Google Patents

Abstract

The invention discloses a movable projector and a projection screen device, which comprises a movable projector and a movable projection screen. Both the projector and the projection screen are installed on the fixing device, and are energized through the retractable cable; the fixing device includes a slider, a guide wire, a bracket, a motor box, a track, and a pulley; the device of the present invention moves quickly and stably. It is especially suitable for projectors and projection screens used in teaching, and can solve the problem that teachers cannot write on the blackboard because the blackboard is blocked by the projection screen.

Description

Portable projector and projection screen device

the

technical field

The invention belongs to a moving device, in particular to a movable projector and a projection screen device.

Background technique

The projector and projection screen in the existing teaching equipment are fixed in position and cannot move laterally. When the projection screen is put down for use, it occupies 40% to 60% of the area of the blackboard. Because the projection screen cannot write chalk characters, and the space on the blackboard is limited, this brings great inconvenience to teachers' teaching activities. If the method of raising and lowering the screen is adopted to solve the problem, a lot of time will be wasted when raising and lowering the screen, and it will also cause additional losses for the teacher's teaching activities. Therefore, when the projector is used, the teacher cannot write on the blackboard; when the teacher writes on the blackboard, the projection device cannot be used. This pair of contradictions has greatly reduced the quality of teaching.

Contents of the invention

In order to overcome the shortage that teachers cannot use the projection device and writing on the blackboard at the same time, the present invention provides a movable projector and a projection screen device.

The purpose of the present invention is achieved through the following technical solutions, a movable projector and a projection screen device, including a movable projector and a movable projection screen; the movable projector includes a first fixing device, a projector body and The first retractable cable; the first fixing device includes a first slide block, a first guide steel wire, a first support, a first motor box, a first track, and a first pulley; the first support is fixed on the ceiling, and the first support One end is equipped with a first pulley, and the other end is equipped with a first motor box; the first linear motor is installed in the first motor box; the first track is fixedly installed on the first bracket; one end of the first guide wire surrounds the first motor box The first motor output end, the other end surrounds the first pulley, the first slider is installed on the first track, and is fixedly connected with the first guide wire, the first motor drives the first guide wire to move in the horizontal direction, the first The guide steel wire drives the horizontal movement of the first slider on the first track; the projector body is fixed at the lower end of the first slider, and the first retractable cable is located in the first bracket and connected with the projector body to energize the projector body .

The movable projection screen includes a second fixing device, a projection screen and a second retractable cable; the second fixing device includes a second slider, a second guide wire, a second bracket, a second motor box, a second track, a second Two pulleys; the second bracket is fixed on the ceiling, one end of the second bracket is equipped with a second pulley, and the other end is equipped with a second motor box; the second linear motor is housed in the second motor box; the second track is fixedly installed on the second On the bracket; one end of the second guide steel wire surrounds the second motor output end in the second motor box, and the other end surrounds the second pulley, the second slider is installed on the second track, and is fixedly connected with the second guide steel wire, the second The motor drives the second guide steel wire to move in the horizontal direction, and the second guide steel wire drives the second slider to move horizontally on the second track; the projection screen is fixed at the lower end of the second slider, and the second retractable cable is located on the second bracket inside and connected to the projection screen.

Further, two first rollers are installed on both sides of the first slider, the distance between the two first rollers is consistent with the width of the first track, and the first slider moves horizontally on the first track through the first rollers ,

Further, the first rail is installed on the first bracket by inserting and penetrating in a transverse manner.

The beneficial effects of the invention are: the linear motor is used as the power, the movement is fast and stable, the waiting time is shorter than the projection screen storage time; the loss is small, the service life is longer than other motors, and it can be used for many times.

The structure is simple, and the space requirements only need to be installed on the ceiling of the classroom.

It can be directly modified on the original projector and projection screen equipment, and the construction is simple and the cost is low.

Description of drawings

Fig. 1 is the structural representation of the first fixing device;

Figure 2 is a left view of the movable projector (projector part);

Fig. 3 is the structural representation of the second fixing device;

Fig. 4 is a left view of the movable projection screen (projection screen part);

Fig. 5 is a schematic structural view of the first roller;

Fig. 6 is a schematic structural view of the second roller;

In the figure, the first slider 2, the first retractable cable 3, the first guide wire 4, the first support 5, the first motor box 6, the first track 7, the first pulley 8, the projection screen 10, the second flexible Telescopic cable 23, second slider 22, first roller 11, second roller 21, second guide wire 24, second bracket 25, second motor box 26, second track 27, second pulley 28.

Specific implementation instructions

Further description will be made below in conjunction with the embodiments and accompanying drawings.

A movable projector and a projection screen device include a movable projector and a movable projection screen.

As shown in Figures 1 and 2, the movable projector includes a first fixing device, a projector body and a first retractable cable 3; the first fixing device includes a first slider 2, a first guide wire 4, a first Bracket 5, first motor box 6, first track 7, first pulley 8.

The first bracket 5 is fixed on the ceiling, the first pulley 8 is installed on one end of the first bracket 5, and the first motor box 6 is installed on the other end; the first linear motor is housed in the first motor box 6; the first track 7 is fixedly installed On the first support 5; one end of the first guide steel wire 4 surrounds the first motor output end in the first motor box 6, and the other end surrounds the first pulley 8, and the first slide block 2 is installed on the first track 7, and is connected with The first guide wire 4 is fixedly connected, the first motor drives the first guide wire 4 to move in the horizontal direction, and the first guide wire 4 drives the first slider 2 to move horizontally on the first track 7;

The projector body is fixed on the lower end of the first slider 2, and the first retractable cable 3 is located in the first support 5, and is connected with the projector body to power the projector body.

As shown in Figures 3 and 4, the movable projection screen includes a second fixing device, a projection screen 10 and a second retractable cable 23; the second fixing device includes a second slider 22, a second guide wire 24, a second Support 25, second motor box 26, second track 27, second pulley 28.

The second support 25 is fixed on the ceiling, and one end of the second support 25 is equipped with a second pulley 28, and the other end is equipped with a second motor box 26; the second linear motor is housed in the second motor box 26; the second track 27 is fixedly installed On the second support 25; the second guide steel wire 24 one end surrounds the second motor output end in the second motor box 26, and the other end surrounds the second pulley 28, and the second slide block 22 is installed on the second track 27, and with The second guide wire 24 is fixedly connected, the second motor drives the second guide wire 24 to move in the horizontal direction, and the second guide wire 24 drives the second slider 22 to move horizontally on the second rail 27;

The projection screen is fixed on the lower end of the second slider 22, and the second retractable cable 23 is located in the second bracket 25, and is connected with the projector body to power the projection screen.

The first support 5 is used to store the redundant first retractable cable 3, and the second support 25 is used to store the redundant second retractable cable 23. When the retractable cable is shrinking, the excess length is placed in the support; When it is long, the insufficient length is made up by the cable in the bracket.

Two first rollers 11 are installed on both sides of the first slider 2, and the distance between the two first rollers 11 is consistent with the width of the first track 7. The first slider 2 passes through the first rollers 11 on the first track. 7 for horizontal movement; two second rollers 21 are installed on both sides of the second slider 22, the distance between the two second rollers 21 is consistent with the width of the second track 27, and the second slider 22 passes through the second roller 11. Perform horizontal movement on the second track 27, and the setting of the rollers can not only reduce the force required for the motor to pull the slider well, but also reduce the noise generated when the slider moves.

As shown in Figures 5 and 6, the first rail 7 is installed on the first bracket 5 by inserting and inserting in a transverse manner, and the second rail 27 is installed on the first bracket 25 by inserting and inserting in a transverse manner. It is conducive to installation and disassembly, ensures the tight fixation between the track and the bracket, ensures the stability of the entire device, and will not shake, vibrate, etc. when the device is in use.

Claims (3)

1. removable projector and a projection screen device, comprise removable projector and removable projection screen; It is characterized in that, described removable projector comprises the first stationary installation, projector body and the first scalable cable (3); The first stationary installation comprises the first slide block (2), the first guiding steel wire (4), the first support (5), the first motor box (6), the first track (7), the first pulley (8); The first support (5) is fixed on ceiling, and one end of the first support (5) is provided with the first pulley (8), and the other end is provided with the first motor box (6); The first motor box is equipped with First Line motor in (6); The first track (7) is fixedly mounted on the first support (5); The first guiding steel wire (4) one end is around the output terminal of the first motor in the first motor box (6), the other end is around the first pulley (8), the first slide block (2) is arranged on the first track (7), and be fixedly connected with the first guiding steel wire (4), the first motor drives the first guiding steel wire (4) motion in the horizontal direction, and the first guiding steel wire (4) drives the tangential movement of the first slide block (2) on the first track (7); Projector body is fixed on the first slide block (2) lower end, and the first scalable cable (3) is positioned at the first support (5), and is connected with projector body, is the energising of projector body;

Described removable projection screen comprises the second stationary installation, projection screen (10) and the second scalable cable (23); The second stationary installation comprises the second slide block (22), the second guiding steel wire (24), the second support (25), the second motor box (26), the second track (27), the second pulley (28); The second support (25) is fixed on ceiling, and one end of the second support (25) is provided with the second pulley (28), and the other end is provided with the second motor box (26); The second motor box is equipped with the second linear electric machine in (26); The second track (27) is fixedly mounted on the second support (25); The second guiding steel wire (24) one end is around the second motor output end in the second motor box (26), the other end is around the second pulley (28), the second slide block (22) is arranged on the second track (27), and be fixedly connected with the second guiding steel wire (24), the second motor drives the second guiding steel wire (24) motion in the horizontal direction, and the second guiding steel wire (24) drives the tangential movement of the second slide block (22) on the second track (27); Projection screen (10) is fixed on the second slide block (22) lower end, and the second scalable cable (23) is positioned at the second support (25), and is connected with projection screen (10).

2. a kind of removable projector according to claim 1 and projection screen device, it is characterized in that, described the first slide block (2) both sides are provided with two the first rollers (11), distance between two the first rollers (11) is consistent with the first track (7) width, and the first slide block (2) moves horizontally at the first track (7) by the first roller (11).

3. a kind of removable projector according to claim 1 and projection screen device, is characterized in that, described the first track (7) is arranged on the first support (5) by the interspersed mode of horizontal embedding.