CN219912471U - Projection device and projection equipment - Google Patents

Abstract

The utility model discloses a projection device and projection equipment, and belongs to the technical field of projection. The projection device includes: the device comprises a first belt wheel, a second belt wheel, a transmission belt, a rotating unit and a driving unit, wherein the rotating unit is rotationally connected with a fixed support and fixedly connected with a projection host, the first belt wheel and the second belt wheel are movably connected with the transmission belt, the first belt wheel is connected with the rotating unit, the driving unit is connected with the second belt wheel so as to drive the projection host to rotate around the axis of the rotating unit, the transmission ratio of the first belt wheel, the second belt wheel and the transmission belt is accurate, the noise is low, the device is simple in structure, and the light emitting direction and the projection angle of the projection host can be accurately regulated by a driving assembly comprising the first belt wheel, the second belt wheel and the transmission belt, so that the projection host can project at different positions so as to improve the flexibility of the projection device.

Description

Projection device and projection equipment

Technical Field

The present utility model relates to the field of projection technologies, and in particular, to a projection apparatus and a projection device.

Background

At present, with the continuous development of technology, projection equipment is increasingly applied to work and life of people, and has the advantages of large imaging picture, high spectrum brightness, wide display color gamut and the like.

A projection device can emit a light beam to a screen, and the screen receives the light beam to display a picture. The projection device can be mounted on a ceiling or on a table top.

However, the projection position and the projection angle of the projection device are relatively fixed, which is inconvenient for the user to adjust the projection device, resulting in lower flexibility of the projection device.

Disclosure of Invention

The embodiment of the utility model provides a projection device and projection equipment. The technical scheme is as follows:

according to a first aspect of the present utility model, there is provided a projection apparatus comprising:

the device comprises a driving assembly, a mounting bracket and a projection host;

the driving assembly and the projection host are positioned on the mounting bracket;

the driving assembly comprises a first belt pulley, a second belt pulley, a transmission belt, a rotating unit and a driving unit, wherein the first belt pulley and the second belt pulley are movably connected with the transmission belt, the first belt pulley and the rotating unit are connected, the driving unit is connected with the second belt pulley, the rotating unit is rotationally connected with the mounting bracket and is fixedly connected with the projection host so as to drive the projection host to rotate around the axis of the rotating unit, and the axis of the rotating unit is intersected with or different from the direction of the main optical axis of a light beam emitted by the projection host.

Optionally, the driving assembly further comprises a locking unit, the locking unit comprises a first stop block and a second stop block, the first stop block is fixedly connected with the mounting bracket, the second stop block is movably connected with the mounting bracket, and a part of the driving belt is positioned between the first stop block and the second stop block;

the second stop block can move between a first position and a second position along a first direction, the first position is located at one side, close to the first stop block, of the second position, the second stop block located at the first position abuts the driving belt on the first stop block, and the first direction is the shortest connecting line direction of the first stop block and the second stop block.

Optionally, the locking unit further comprises a first bracket, and the first bracket is fixedly connected with the mounting bracket;

the second stop block comprises an electromagnet, the electromagnet is located in the first support and movably connected with the first support, the material of the first stop block comprises iron, and the electromagnet is used for extending out of the first support under the action of magnetic force and is adsorbed with the first stop block to fix the transmission belt.

Optionally, the locking unit further comprises an elastic element, wherein the elastic element is located in the first bracket;

one end of the elastic element is connected with the electromagnet, the other end of the elastic element is connected with the first bracket, and the elastic element is in a stretching state when the electromagnet stretches out of the first bracket.

Optionally, the driving assembly further comprises a tensioning unit comprising a first rotation shaft, an adjusting plate and a contact part;

the first rotating shaft is fixedly connected with the mounting bracket, the adjusting plate is rotationally connected with the first rotating shaft, the adjusting plate is further connected with the contact part, a preset distance is reserved between the first rotating shaft and the contact part, the contact part is driven to rotate between a third position and a fourth position around the axis of the first rotating shaft, the contact part at the third position is separated from the transmission belt, and the contact part at the fourth position is abutted to the transmission belt.

Optionally, the tensioning unit further comprises a locking screw, the adjusting plate is provided with an adjusting through hole, the adjusting through hole is arc-shaped, and the circle center of the arc-shaped is coincident with the position where the first rotating shaft is located;

the mounting bracket is provided with a mounting through hole matched with the adjusting through hole, and the locking screw is positioned in the adjusting through hole and the mounting through hole.

Optionally, the contact portion includes a second rotation shaft, the second rotation shaft is rotatably connected with the adjusting plate, and an axis of the second rotation shaft is perpendicular to a moving direction of the driving belt.

Optionally, the rotating unit includes a third rotating shaft, one end of the third rotating shaft is fixedly connected with the projection host, the other end of the rotating shaft is fixedly connected with the first belt pulley, and the axis of the third rotating shaft is the axis of the rotating unit;

the mounting bracket is provided with a first through hole, and part of the rotating shaft is positioned in the first through hole so that the rotating shaft is rotationally connected with the mounting bracket.

Optionally, the rotating unit further comprises a mounting part, the mounting part comprises a first mounting plate and a second mounting plate, the first mounting plate is fixedly connected with the second mounting plate, and the first mounting plate is fixedly connected with one end of the rotating shaft;

the projection host is provided with a bottom plate and a top plate which are opposite to each other, and a side plate connecting the bottom plate and the top plate;

the first mounting plate is fixedly connected with the side plate, and the second mounting plate is fixedly connected with the bottom plate.

According to another aspect of the present utility model, there is provided a projection apparatus, including a projection device and a curtain, where the projection device is the projection device described above.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

a projection device including a driving assembly, a fixed bracket, and a projection host is provided. The drive assembly includes first band pulley, the second band pulley, the drive belt, rotate unit and drive unit, rotate the unit and rotate with the fixed bolster and be connected, and with projection host computer fixed connection, first band pulley and second band pulley all with drive belt swing joint, first band pulley and rotation unit are connected, drive unit and second band pulley are connected, in order to drive the projection host computer and revolute the axis rotation of rotation unit, and the transmission ratio of first band pulley, second band pulley and drive belt is accurate, the noise is low, simple structure, the light-emitting direction and the projection angle of projection host computer are accurately adjusted to the drive assembly including first band pulley, second band pulley and drive belt, make the projection host computer can project to different positions, in order to improve projection arrangement's flexibility. The problem of lower flexibility of the projection device in the related art can be solved, and the effect of improving the flexibility of the projection device is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic exploded view of the drive assembly and mounting bracket of the projection device of FIG. 1;

FIG. 3 is a schematic diagram illustrating a position of a projection host according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating a position of another projection host according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a drive assembly and mounting bracket according to an embodiment of the present utility model;

FIG. 6 is a schematic view of another drive assembly and mounting bracket provided in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic view of another drive assembly and mounting bracket provided in accordance with an embodiment of the present utility model;

fig. 8 is a schematic structural view of a locking unit according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of another locking unit according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a tensioning unit according to an embodiment of the present utility model;

FIG. 11 is a schematic view of another tensioning unit according to an embodiment of the present utility model;

FIG. 12 is a schematic view of another projection apparatus according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a connection structure of a mounting portion of the projection apparatus shown in FIG. 12;

FIG. 14 is a schematic view showing a connection structure of another mounting portion in the projection apparatus shown in FIG. 12;

FIG. 15 is a schematic view of a projection host in the projection apparatus shown in FIG. 12;

FIG. 16 is a schematic view of another projection apparatus according to an embodiment of the present utility model;

FIG. 17 is a schematic diagram of another projection apparatus according to an embodiment of the present utility model;

fig. 18 is a schematic structural diagram of another projection apparatus according to an embodiment of the present utility model.

Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a projection apparatus 10 according to an embodiment of the present utility model, and fig. 2 is an exploded structural diagram of a driving assembly 11 and a mounting bracket 12 in the projection apparatus 10 shown in fig. 1, referring to fig. 1 and 2, the projection apparatus 10 may include: a drive assembly 11, a mounting bracket 12, and a projection host 13.

The drive assembly 11 and the projection host 13 are located on a mountable support 12. The driving assembly 11 may include a first pulley 111, a second pulley 112, a driving belt 113, a rotating unit 114 and a driving unit 115, where the first pulley 111 and the second pulley 112 may be movably connected with the driving belt 113, the first pulley 111 may be connected with the rotating unit 114, the driving unit 115 may be connected with the second pulley 112, the rotating unit 114 may be rotatably connected with the mounting bracket 12 and may be fixedly connected with the projection host 13, so as to drive the projection host 13 to rotate around an axis s1 of the rotating unit 114, and the axis s1 of the rotating unit 114 intersects or is different from a direction of a main optical axis of a light beam emitted by the projection host 13.

The driving unit 115 may drive the second pulley 112 to rotate, the second pulley 112 may drive the first pulley 111 via the driving belt 113, and the first pulley 111 may drive the rotating unit 114 to rotate. In this way, in the embodiment of the present utility model, the driving assembly 11 drives the projection host 13 to rotate around the axis s1 of the rotation unit 114, so as to adjust the direction of the main optical axis of the outgoing beam of the projection host 13, and further flexibly adjust the position and angle of the projection picture projected by the projection host 13.

In summary, the embodiment of the utility model provides a projection device including a driving assembly, a fixing bracket and a projection host. The drive assembly includes first band pulley, the second band pulley, the drive belt, rotate unit and drive unit, rotate the unit and rotate with the fixed bolster and be connected, and with projection host computer fixed connection, first band pulley and second band pulley all with drive belt swing joint, first band pulley and rotation unit are connected, drive unit and second band pulley are connected, in order to drive the projection host computer and revolute the axis rotation of rotation unit, and the transmission ratio of first band pulley, second band pulley and drive belt is accurate, the noise is low, simple structure, the light-emitting direction and the projection angle of projection host computer are accurately adjusted to the drive assembly including first band pulley, second band pulley and drive belt, make the projection host computer can project to different positions, in order to improve projection arrangement's flexibility. The problem of lower flexibility of the projection device in the related art can be solved, and the effect of improving the flexibility of the projection device is achieved.

As shown in fig. 1, alternatively, the axis s1 of the rotation unit 114 and the direction of the main optical axis of the outgoing beam of the projection host 13 may intersect or be different, that is, the axis s1 of the rotation unit 114 and the direction of the main optical axis of the outgoing beam of the projection host 13 may not be parallel, so, by connecting the projection host 13 with the driving assembly 11, the driving assembly 11 can drive the projection host 13 to rotate clockwise by a preset angle or rotate counterclockwise by a preset angle along the axis s1 of the rotation unit 114. Thus, the user may rotate the projection host 13 based on the current viewing requirement, and illustratively, the driving component 11 may drive the projection host 13 to rotate clockwise along the axis s1 of the rotating unit 114 by a preset angle, or rotate anticlockwise along the axis s1 of the rotating unit 114 by a preset angle, where the preset angle may include an angle of 45 °, 60 ° or 90 ° to change the projection position of the projection host 13, so that the current projection position of the projection device meets the requirement of the user.

Fig. 3 is a schematic diagram of a position of a projection host 13 according to an embodiment of the present utility model, and fig. 4 is a schematic diagram of a position of another projection host 13 according to an embodiment of the present utility model, please refer to fig. 3 and fig. 4, in an exemplary embodiment, an axis s1 of a rotating unit 114 may be parallel to a ground, and when a posture of a user is a sitting posture, the projection host 13 may be located at a position shown in fig. 3, and at this time, a projection device may project a projection image onto a wall surface or a curtain located on the wall surface. When the user is lying, the user can rotate the projection host 13 from the position in fig. 3 to the position in fig. 4 through the driving assembly 11, and at this time, the projection device can project the projection picture onto the ceiling or a curtain on the ceiling, so as to improve the comfort level of viewing the image picture projected by the projection device.

Fig. 5 is a schematic structural diagram of a driving assembly 11 and a mounting bracket 12 according to an embodiment of the present utility model, fig. 6 is a schematic structural diagram of another driving assembly 11 and a mounting bracket 12 according to an embodiment of the present utility model, and fig. 7 is a schematic structural diagram of another driving assembly 11 and a mounting bracket 12 according to an embodiment of the present utility model, please refer to fig. 5, 6 and 7. Alternatively, the transmission belt 113 may be a timing belt, which is an endless belt having an inner peripheral surface with equidistant tooth shapes so as to be engaged with a toothed pulley. The inner side of the driving belt 113 may have tooth grooves, which are concave portions of teeth and teeth of the driving belt 113.

The first pulley 111 and the second pulley 112 may each be gears, and the space between adjacent teeth on the first pulley 111 and the second pulley 112 may be referred to as a tooth space or tooth space. The size of the teeth of the driving belt 113 may be matched to the size of the tooth grooves of the first pulley 111 and the second pulley 112, and the size of the tooth grooves of the driving belt 113 may be matched to the size of the teeth of the first pulley 111 and the second pulley 112. The second pulley 112 may be a driving pulley, the first pulley 111 may be a driven pulley, and the radius of the first pulley 111 may be larger than the radius of the second pulley 112. The driving unit 115 may include a driving motor.

When the driving assembly 11 drives the projection host 13 to rotate, the power output by the driving motor can be transmitted through the meshing of the teeth of the driving belt 113 with the tooth grooves of the first pulley 111 and the second pulley 112. The driving motor may have an output shaft, the output shaft of the driving motor may be fixedly connected with the center of the second pulley 112, and the driving motor may be used for driving the second pulley 112 to rotate around its own central axis; the driving belt 113 is engaged with the first pulley 111 and the second pulley 112, respectively, and the second pulley 112 drives the first pulley 111 to rotate around its central axis through the driving belt 113, and the axis of the first pulley 111 may be the axis s1 of the rotating unit 114. Illustratively, the rotation of the second pulley 112 about its central axis includes: rotation around the first direction and rotation around the second direction. Wherein the first direction may be one of a clockwise rotation direction and a counterclockwise rotation direction, and the second direction may be the other of the clockwise rotation direction and the counterclockwise rotation direction. The rotation direction of the first pulley 111 may be the same as that of the second pulley 112.

The transmission mode of the driving component 11 in the embodiment of the utility model not only has the characteristics of accurate transmission ratio and no slip of the gear transmission mechanism, but also has the characteristics of low noise, low cost and simple structure which are special for belt transmission, and has stable transmission, wide transmission ratio range and an exemplary transmission ratio of up to 1:10.

In an exemplary real-time manner, a manual manner may also be employed for the driving manner of the second pulley 112. For example, an adjusting knob is disposed on a side of the second pulley 112 away from the projection host 13, and the second pulley 112 may be rotated manually to rotate the first pulley 111 via the driving belt 113.

Fig. 8 is a schematic structural diagram of a locking unit 116 according to an embodiment of the present utility model, and fig. 9 is a schematic structural diagram of another locking unit 116 according to an embodiment of the present utility model, please refer to fig. 8 and 9. Optionally, the driving assembly 11 may further include a locking unit 116, where the locking unit 116 may include a first stop 1161 and a second stop 1162, the first stop 1161 may be fixedly connected to the mounting bracket 12, the second stop 1162 may be movably connected to the mounting bracket 12, and a portion of the driving belt 113 may be located between the first stop 1161 and the second stop 1162.

The second block 1162 is movable between a first position and a second position along a first direction, the first position is located at one side of the second position close to the first block 1161, and the second block 1162 located at the first position abuts the driving belt 113 on the first block 1161, wherein the first direction is a shortest line direction of the first block 1161 and the second block 1162.

As such, during rotation of the drive belt 113, the second stop 1162 may be located at a second position, and a distance between the second stop 1162 and the first stop 1161 located at the second position may be greater than a thickness of the drive belt 113 to enable movement of the drive belt 113 between the first stop 1161 and the second stop 1162; when the driving assembly 11 drives the projection host 13 to a target position (i.e., the position of the projection host 13 currently required by a user), the second stop 1162 may be located at the first position, and the distance between the second stop 1162 located at the first position and the first stop 1161 may be smaller than or equal to the thickness of the driving belt 113, so that the driving belt 113 is abutted to the first stop 1161, and the driving belt 113 may be prevented from rotating, so as to lock the driving assembly 11, and further, the rotating unit 114 and the projection host 13 may be locked at the current position, so that stability of the projection device may be improved.

Optionally, the locking unit 116 may further include a first bracket 1163, where the first bracket 1163 may be fixedly connected to the mounting bracket 12. The second block 1162 may include an electromagnet, where the electromagnet may be located in the first bracket 1163 and movably connected to the first bracket 1163, and the material of the first block 1161 includes iron, where the electromagnet is used to extend from the first bracket 1163 under the effect of magnetic force, and is adsorbed by the first block 1161 to fix the belt 113. The projection device may further include a control assembly, the control assembly may be mounted on the mounting bracket 12, the electromagnet may be electrically connected to the control assembly, the electromagnet may be mounted in the first bracket 1163 and movably connected to the first bracket 1163, and the first bracket 1163 may be mounted on the mounting bracket 12.

Since the locking unit 116 in the embodiment of the present utility model fixes the driving belt 113 by using the magnetic force generated by the electromagnet, that is, the electromagnet can abut each position of the driving belt 113 against the first stop 1161, the flexibility of the locking position of the driving belt 113 can be improved.

In addition, the locking unit 116 in the embodiment of the present utility model is not provided with a pin-type fixing device, and the electromagnet and the first stop 1161 are adsorbed to fix the driving belt 113, so that phenomena such as locking or shaking of the driving belt 113 can be avoided to a great extent, and the manufacturing difficulty, transportation and maintenance difficulty of the driving assembly 11 can be reduced.

In an alternative embodiment, the locking unit 116 may further include a resilient member, which may be located in the first bracket 1163, one end of which may be connected to the electromagnet, and the other end of which may be connected to the first bracket 1163, and which may be in a stretched state when the electromagnet protrudes from the first bracket 1163. Therefore, when the electromagnet is not adsorbed to the first stop block 1161, the elastic element can separate the electromagnet from the first stop block 1161, so that the phenomenon of friction between the electromagnet and the driving belt 113 when the driving belt 113 moves is avoided. The resilient element may be a spring.

Fig. 10 is a schematic structural view of a tensioning unit 117 according to an embodiment of the present utility model, and fig. 11 is a schematic structural view of another tensioning unit 117 according to an embodiment of the present utility model, referring to fig. 11 and 12, in an alternative embodiment, the driving assembly 11 may further include a tensioning unit 117, and the tensioning unit 117 may include a first rotation shaft 1171, an adjusting plate 1172, and a contact portion 1173. The first rotating shaft 1171 may be fixedly connected with the mounting bracket 12, the adjusting plate 1172 may be rotatably connected with the first rotating shaft 1171, the adjusting plate 1172 may be further connected with the contact portion 1173, a preset distance may be provided between the first rotating shaft 1171 and the contact portion 1173, so as to drive the contact portion 1173 to rotate between a third position and a fourth position around an axis of the first rotating shaft 1171, the contact portion 1173 located at the third position may be separated from the driving belt 113, and the contact portion 1173 located at the fourth position may be abutted against the driving belt 113.

Illustratively, the first rotating shaft 1171 may be fixedly connected to the mounting bracket 12, the adjusting plate 1172 has an adjusting through hole 11721, and the first rotating shaft 1171 may be located in the adjusting through hole 11721, so that the adjusting plate 1172 is rotationally connected to the first rotating shaft 1171, and thus the adjusting plate 1172 may rotate about the axis of the first rotating shaft 1171. The tension unit 117 may be installed at a side of the mounting bracket 12 remote from the projection main unit 13. By rotating the adjusting plate 1172 in the tension unit 117, the contact portion 1173 mounted on the adjusting plate 1172126 can be brought into contact with the belt 113, and the tightness of the belt 113 can be adjusted with the change of the rotation angle of the adjusting plate 1172, so that the belt 113 achieves a stable transmission effect.

In an exemplary embodiment, the tensioning unit 117 may further include a locking screw 1174, the adjusting plate 1172 may have an adjusting through hole 11721 thereon, the adjusting through hole 11721 may have an arc shape, and a center of the arc shape may coincide with a position where the first rotation shaft 1171 is located. The mounting bracket 12 has mounting through holes that mate with the adjustment through holes 11721, and locking screws 1174 are located in the adjustment through holes 11721 and the mounting through holes.

When the adjustment plate 1172 is rotatable about the axis of the first rotation shaft 1171, the position of the locking screw 1174 in the adjustment through hole 11721 is changed, and when the adjustment plate 1172 is rotated to a proper position so that the tightness of the transmission belt 113 is proper, the locking screw 1174 can be fixedly connected with the mounting bracket 12 to fix the adjustment plate 1172 at the current position.

In an alternative embodiment, the contact portion 1173 may include a second rotation shaft, which may be rotatably connected to the adjustment plate 1172, and an axis of which may be perpendicular to the moving direction of the driving belt 113. During rotation of the adjustment plate 1172 about the axis of the first rotational shaft 1171, the shape of the belt 113 can be adjusted by the contact portion 1173, thereby adjusting the tightness of the connection of the belt 113 with the first pulley 111 and the second pulley 112. The second rotation shaft is rotatably connected to the adjustment plate 1172, and when the second rotation shaft is in contact with the moving belt 113, the belt 113 can drive the second rotation shaft to rotate around the axis of the second rotation shaft, so that friction force generated when the second rotation shaft is in contact with the belt 113 can be reduced, and larger friction force between the tensioning unit 117 and the belt 113 can be avoided.

Alternatively, as shown in fig. 2, the rotating unit 114 may include a third rotating shaft 1141, one end of the third rotating shaft 1141 is fixedly connected to the projection host 13, the other end of the third rotating shaft 1141 may be fixedly connected to the first pulley 111, and an axis of the third rotating shaft 1141 is an axis s1 of the rotating unit 114. The mounting bracket 12 has a first through hole c1 therein, and a portion of the third rotary shaft 1141 may be positioned in the first through hole c1 such that the third rotary shaft 1141 is rotatably coupled to the mounting bracket 12. The third rotating shaft 1141 may be connected to the center of the first pulley 111, so that the driving motor may drive the first pulley 111 to rotate through the second pulley 112 and the driving belt 113, and the first pulley 111 may drive the third rotating shaft 1141 to rotate, and then the third rotating shaft 1141 drives the projection host 13 to rotate around the axis s1 of the rotating unit 114.

Fig. 12 is a schematic structural view of another projection apparatus 10 according to an embodiment of the present utility model, fig. 13 is a schematic structural view of a connection structure of a mounting portion of the projection apparatus shown in fig. 12, fig. 14 is a schematic structural view of a connection structure of another mounting portion of the projection apparatus shown in fig. 12, fig. 15 is a schematic structural view of a projection host 13 of the projection apparatus 10 shown in fig. 12, please refer to fig. 12, fig. 13, fig. 14 and fig. 15. Optionally, the rotating unit 114 may further include a mounting portion 1142, the mounting portion 1142 may include a first mounting plate k1 and a second mounting plate k2, the first mounting plate k1 and the second mounting plate k2 may be fixedly connected, and the first mounting plate k1 may be fixedly connected with one end of the third rotating shaft 1141. The projection host 13 may have opposite bottom and top plates, and side plates connecting the bottom and top plates, the first mounting plate k1 may be fixedly connected to the side plates, and the second mounting plate k2 may be fixedly connected to the bottom plate. Thus, the connection between the projection host 13 and the third rotation shaft 1141 is stable. The projection host 13 may be bolted to the first mounting plate k1 and the second mounting plate k 2.

Fig. 16 is a schematic structural view of another projection apparatus 10 according to an embodiment of the present utility model, and fig. 17 is a schematic structural view of another projection apparatus 10 according to an embodiment of the present utility model, as shown in fig. 5 and 6, optionally, the driving assembly 11 may further include a first position sensor 118 and a second position sensor 119, where the first position sensor 118 and the second position sensor 119 may be located on the mounting bracket 12, and the first position sensor 118 and the second position sensor 119 may be electrically connected to the control assembly.

The rotating unit 114 is capable of driving the projection host 13 to move around the axis s1 of the rotating unit 114 between a fifth position and a sixth position, when the projection host 13 is located at the fifth position, the rotating unit 114 may be in contact with the first position sensor 118, the first position sensor 118 sends a first position signal to the control component, and when the projection host 13 is located at the sixth position, the rotating unit 114 may be in contact with the second position sensor 119, and the second position sensor 119 sends a second position signal to the control component.

The rotating unit 114 may further include a rotating plate 1143, a first light blocking plate 1144, and a second light blocking plate 1145, where the rotating plate 1143 may be located between the projection host 1311 and the fixed bracket 139, and the rotating plate 1143 is fixedly connected to the rotating unit 114, and the first light blocking plate 1144 and the second light blocking plate 1145 are located on a surface of the rotating plate 1143 away from the projection host 1311.

The first position sensor 118 and the second position sensor 119 may be photoelectric sensors, and when the projection host 1311 is located at a first position, the first light barrier 1144 is located in the first position sensor 118 to trigger the first position sensor 118 to send a signal to the control component, and when the projection host 1311 is located at a second position, the second light barrier 1145 is located in the second position sensor 119 to trigger the second position sensor 119 to send a signal to the control component.

Fig. 18 is a schematic structural diagram of another projection apparatus 10 according to an embodiment of the present utility model, referring to fig. 18, a mounting bracket 12 may include a mounting base 121 and two fixing brackets 122, where the two fixing brackets 122 are both connected to the mounting base 121 by bolts, and the two fixing brackets 122 are also both connected to a projection host 13 to improve stability of the projection apparatus 10.

In summary, the embodiment of the utility model provides a projection device including a driving assembly, a fixing bracket and a projection host. The drive assembly includes first band pulley, the second band pulley, the drive belt, rotate unit and drive unit, rotate the unit and rotate with the fixed bolster and be connected, and with projection host computer fixed connection, first band pulley and second band pulley all with drive belt swing joint, first band pulley and rotation unit are connected, drive unit and second band pulley are connected, in order to drive the projection host computer and revolute the axis rotation of rotation unit, and the transmission ratio of first band pulley, second band pulley and drive belt is accurate, the noise is low, simple structure, the light-emitting direction and the projection angle of projection host computer are accurately adjusted to the drive assembly including first band pulley, second band pulley and drive belt, make the projection host computer can project to different positions, in order to improve projection arrangement's flexibility. The problem of lower flexibility of the projection device in the related art can be solved, and the effect of improving the flexibility of the projection device is achieved.

The embodiment of the utility model also provides a projection device which can comprise a projection device and a curtain, wherein the projection device is the projection device in any embodiment.

In the present utility model, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.

Claims (10)

1. A projection device, the projection device comprising: the device comprises a driving assembly, a mounting bracket and a projection host;

the driving assembly and the projection host are positioned on the mounting bracket;

the driving assembly comprises a first belt pulley, a second belt pulley, a transmission belt, a rotating unit and a driving unit, wherein the first belt pulley and the second belt pulley are movably connected with the transmission belt, the first belt pulley and the rotating unit are connected, the driving unit is connected with the second belt pulley, the rotating unit is rotationally connected with the mounting bracket and is fixedly connected with the projection host so as to drive the projection host to rotate around the axis of the rotating unit, and the axis of the rotating unit is intersected with or different from the direction of the main optical axis of a light beam emitted by the projection host.

2. The projection device of claim 1, wherein the drive assembly further comprises a locking unit comprising a first stop and a second stop, the first stop being fixedly connected to the mounting bracket, the second stop being movably connected to the mounting bracket, a portion of the belt being located between the first stop and the second stop;

the second stop block can move between a first position and a second position along a first direction, the first position is located at one side, close to the first stop block, of the second position, the second stop block located at the first position abuts the driving belt on the first stop block, and the first direction is the shortest connecting line direction of the first stop block and the second stop block.

3. The projection device of claim 2, wherein the locking unit further comprises a first bracket fixedly coupled to the mounting bracket;

the second stop block comprises an electromagnet, the electromagnet is located in the first support and movably connected with the first support, the material of the first stop block comprises iron, and the electromagnet is used for extending out of the first support under the action of magnetic force and is adsorbed with the first stop block to fix the transmission belt.

4. A projection device as claimed in claim 3, wherein the locking unit further comprises a resilient element, the resilient element being located in the first bracket;

one end of the elastic element is connected with the electromagnet, the other end of the elastic element is connected with the first bracket, and the elastic element is in a stretching state when the electromagnet stretches out of the first bracket.

5. The projection device of claim 1, wherein the drive assembly further comprises a tensioning unit comprising a first rotational shaft, an adjustment plate, and a contact portion;

the first rotating shaft is fixedly connected with the mounting bracket, the adjusting plate is rotationally connected with the first rotating shaft, the adjusting plate is further connected with the contact part, a preset distance is reserved between the first rotating shaft and the contact part, the contact part is driven to rotate between a third position and a fourth position around the axis of the first rotating shaft, the contact part at the third position is separated from the transmission belt, and the contact part at the fourth position is abutted to the transmission belt.

6. The projection device of claim 5, wherein the tensioning unit further comprises a locking screw, the adjusting plate is provided with an adjusting through hole, the adjusting through hole is arc-shaped, and the circle center of the arc-shaped is coincident with the position where the first rotating shaft is located;

the mounting bracket is provided with a mounting through hole matched with the adjusting through hole, and the locking screw is positioned in the adjusting through hole and the mounting through hole.

7. The projection apparatus according to claim 5, wherein the contact portion includes a second rotation shaft rotatably connected to the adjustment plate, and an axis of the second rotation shaft is perpendicular to a moving direction of the belt.

8. The projection device of claim 1, wherein the rotating unit includes a third rotating shaft, one end of the third rotating shaft is fixedly connected with the projection host, the other end of the rotating shaft is fixedly connected with the first belt pulley, and an axis of the third rotating shaft is an axis of the rotating unit;

the mounting bracket is provided with a first through hole, and part of the rotating shaft is positioned in the first through hole so that the rotating shaft is rotationally connected with the mounting bracket.

9. The projection device of claim 8, wherein the rotating unit further comprises a mounting portion, the mounting portion comprising a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate being fixedly connected, the first mounting plate being fixedly connected with one end of the rotating shaft;

the projection host is provided with a bottom plate and a top plate which are opposite to each other, and a side plate connecting the bottom plate and the top plate;

the first mounting plate is fixedly connected with the side plate, and the second mounting plate is fixedly connected with the bottom plate.

10. A projection device comprising a projection apparatus and a curtain, the projection apparatus being a projection apparatus according to any one of claims 1 to 9.