CN115437204A - Reflecting device and projection equipment - Google Patents

Abstract

The application provides a reflecting device, which comprises a fixed structure, a vibrating assembly and a first reflecting piece; the vibration component comprises a first elastic electrode, a second elastic electrode and a piezoelectric element, the first elastic electrode and the second elastic electrode are arranged on the fixed structure at intervals, the piezoelectric element is abutted between the first elastic electrode and the second elastic electrode along the Z axis and can swing around the X axis under the action of an electric field generated by the cooperation of the first elastic electrode and the second elastic electrode, and the first elastic electrode and the second elastic electrode are electrically connected with an external alternating current power supply; the first reflecting piece is configured to be capable of moving along with the piezoelectric element, the first elastic electrode or the second elastic electrode so as to adjust the reflecting direction and the angle of the first reflecting piece; the application provides a reflection device includes reflection device and projector body, the projector body is located to reflection device, projection equipment includes the projection plane, the projection plane is used for receiving the follow the light of reflection device outgoing to carry out the projection.

Description

Reflectors and projection equipment

technical field

The present application belongs to the technical field of projection, and more specifically relates to a reflection device and projection equipment.

Background technique

Projectors usually use laser light sources for projection. Laser light sources can be divided into two types, one is monochromatic laser, the other is three-color laser. The laser light source is a line beam light source, so it is necessary to diffuse a single laser light source to It is used for projection; when the laser light source is not sufficiently diffused, dazzling spots are likely to appear on the screen, resulting in poor projection image quality.

Contents of the invention

The purpose of the embodiments of the present application is to provide a reflection device and a projection device to solve the technical problem of insufficient light source diffusion in the prior art.

In order to achieve the above purpose, the technical solution adopted by this application is to provide a reflection device, including:

fixed structure;

A vibrating assembly, the vibrating assembly includes a first elastic electrode, a second elastic electrode and a piezoelectric element, the first elastic electrode and the second elastic electrode are spaced apart from the fixed structure, and the piezoelectric element is arranged along the Z The shaft abuts between the first elastic electrode and the second elastic electrode, and can swing around the X-axis under the action of the electric field generated by the cooperation of the first elastic electrode and the second elastic electrode;

The first reflector, the first reflector is configured to move with the piezoelectric element, the first elastic electrode and/or the second elastic electrode, so as to adjust the reflection direction of the first reflector and angle.

Optionally, the piezoelectric element is configured to protrude from opposite sides of the first elastic electrode and the second elastic electrode along the Y axis, and the fixing structure has a first limiting portion and a second Limiting parts, the first limiting part and the second limiting part are respectively provided on opposite sides of the piezoelectric element along the Z axis, the first limiting part and the second limiting part Distributed at intervals along the Y-axis, and used to respectively limit the opposite sides of the piezoelectric element protruding from the first elastic electrode and the second elastic electrode along the Y-axis.

Optionally, the vibration component includes more than three elastic electrodes distributed along the Z-axis at intervals, the piezoelectric element is in contact between any two adjacent elastic electrodes, and any two adjacent elastic electrodes The elastic electrodes are respectively the first elastic electrode and the second elastic electrode.

Optionally, the first elastic electrode includes a first elastic piece and a first elastic portion, the first elastic portion is connected between the first elastic piece and the fixing structure, and the second elastic electrode includes a second An elastic piece and a second elastic part, the second elastic part is connected between the second elastic piece and the fixing structure, and is spaced apart from the first elastic part, and the piezoelectric element abuts against the Between the first elastic piece and the second elastic piece.

Optionally, the first elastic portion and the second elastic portion are respectively provided outside opposite ends of the piezoelectric element along the X-axis, or the first elastic portion and the second elastic portion are respectively It is arranged on opposite sides of the piezoelectric element along the Z axis.

Optionally, the first elastic portion and the second elastic portion are respectively disposed outside opposite ends of the piezoelectric element along the X-axis, and both the first elastic portion and the second elastic portion are bent shape; the bending direction of the first elastic portion is perpendicular to the Z axis, and/or, the bending direction of the second elastic portion is perpendicular to the Z axis.

Optionally, the first elastic part is connected to any one of the opposite ends of the first elastic piece along the Y axis, and the second elastic part is connected to any one of the opposite ends of the second elastic piece along the Y axis. one end.

Optionally, the first elastic electrode further includes a first fixing part, the first fixing part is connected to an end of the first elastic part away from the first elastic piece, and is connected to the fixing structure;

And/or, the second elastic electrode further includes a second fixing portion, the second fixing portion is connected to an end of the second elastic portion away from the second elastic piece, and is connected to the fixing structure.

Optionally, the first reflector is disposed on one side of the piezoelectric element along the Z-axis; or, the first reflector is disposed on opposite sides of the piezoelectric element along the Z-axis.

Optionally, a movable cavity is provided in the fixed structure, and the movable cavity has an opening; the piezoelectric element, the first reflector, at least part of the first elastic electrode and the second elastic electrode At least part of all are located in the active cavity, the first reflector is facing the opening, and can receive or reflect light through the opening.

The present application also provides a projection device, including the reflection device and a projector body, the reflection device is arranged on the projector body, the projection device includes a projection plane, and the projection plane is used to receive light and cast projections.

Optionally, the number of the reflectors is set to be multiple, and the plurality of reflectors are distributed at intervals, and a second reflector is provided between any two adjacent reflectors, and the second reflector configured to reflect light emitted by the first reflector of one of the reflectors to the first reflector of the other reflector;

Alternatively, any adjacent three reflective devices are arranged at intervals, and any one of them is located between the light-emitting sides of the other two said reflective devices, and any one of them is configured to connect the other two said reflective devices The optical signal emitted by the first reflector of one of the reflectors is reflected to the first reflector of the other reflector.

Optionally, the swing axes of the piezoelectric elements of two adjacent reflecting devices are parallel, or the swing axes of the piezoelectric elements of two adjacent reflecting devices form a preset angle.

Optionally, the light received by the projection plane forms an angle smaller than 90° with the projection plane.

The beneficial effects of the reflection device provided by the application are:

The reflection device provided by this application uses the alternating electric field generated by the first elastic electrode and the second elastic electrode, and utilizes the principle of the inverse piezoelectric effect of the piezoelectric material to make the piezoelectric element continuously swing around the X axis, and the piezoelectric element can drive the first A reflector constantly swings around the X-axis, so that the incident point of the incident light on the first reflector is constantly changing, thereby changing the incident angle of the incident light, thereby changing the reflection direction of the reflected light, and realizing the diffusion of the light; and At the same time, the electric field generated by the first elastic electrode and the second elastic electrode causes the piezoelectric element to swing repeatedly. During the swing process of the piezoelectric element, both the first elastic electrode and the second elastic electrode store force, and the piezoelectric element changes the swing direction. During the process, the elastic force of the first elastic electrode and the second elastic electrode will drive the piezoelectric element to swing quickly, so that the swing frequency of the piezoelectric element will be accelerated, so that the light irradiated on the first reflector will be fully diffused, preventing the screen from being dazzling. plaque.

The beneficial effects of the projection device provided by the application are:

The projection device provided by the present application diffuses the projection light of the projector body through the reflection device, so that the projection light is fully diffused and prevents dazzling spots from appearing on the projection screen.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

FIG. 1 is a perspective view of a reflection device provided in Embodiment 1 of the present application;

FIG. 2 is a perspective view of the first internal structure of the reflection device provided in Embodiment 1 of the present application;

FIG. 3 is an optical path diagram of the reflection device provided in Embodiment 1 of the present application;

FIG. 4 is a cross-sectional view of the reflection device provided in Embodiment 1 of the present application;

FIG. 5 is a perspective view of the second internal structure of the reflection device provided in Embodiment 1 of the present application;

FIG. 6 is a perspective view of a projection device provided in Embodiment 1 of the present application;

FIG. 7 is a first optical path diagram of the projection device provided in Embodiment 1 of the present application;

FIG. 8 is a second optical path diagram of the projection device provided in Embodiment 1 of the present application;

FIG. 9 is a perspective view of a projection device provided in Embodiment 5 of the present application;

FIG. 10 is a side view of the projection device provided in Embodiment 5 of the present application;

FIG. 11 is a top view of the projection device provided in Embodiment 5 of the present application;

Fig. 12 is a partial enlarged view of A in Fig. 11 .

Wherein, each reference sign in the figure:

1. Fixed structure; 11. First limiting part; 12. Second limiting part; 13. Activity chamber; 14. Opening; 15. Shell; 16. Cover; 17. Transparent layer;

2. Vibration component; 21. First elastic electrode; 211. First elastic piece; 212. First elastic part; 213. First fixing part; 22. Second elastic electrode; 221. Second elastic piece; 222. Second elastic 223, the second fixed part; 23, the piezoelectric element; 231, the first end; 232, the second end;

3. The first reflector;

4. Projector body;

5. Projection plane;

6. The second reflector.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying No device or element must have a particular orientation, be constructed, and operate in a particular orientation, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

Based on this, the embodiment of the present invention provides a reflection device and a projection device. The reflection device can fully diffuse light through the cooperation of the piezoelectric element 23 and the elastic electrode.

Embodiment one

As shown in Figures 1 to 2, the embodiment of the present application provides a reflection device, including a fixed structure 1, a vibration component 2, and a first reflection member 3; the vibration component 2 includes a first elastic electrode 21, a second elastic electrode 22 and the piezoelectric element 23, the first elastic electrode 21 and the second elastic electrode 22 are spaced apart from the fixed structure 1, the piezoelectric element 23 abuts between the first elastic electrode 21 and the second elastic electrode 22 along the Z axis, and can Under the action of the electric field generated by the cooperation of the first elastic electrode 21 and the second elastic electrode 22, it swings around the X-axis; the first reflector 3 is configured to be able to to adjust the reflection direction and angle of the first reflector 3.

What needs to be explained here is that the X-axis mentioned above and below refers to the bidirectional direction of the X-axis defined by the spatial coordinate system, and the Y-axis involved below refers to the bidirectional direction of the Y-axis defined by the spatial coordinate system. The Z axis referred to above and below refers to the bidirectional direction of the Z axis defined by the spatial coordinate system.

Specifically, the piezoelectric element 23 is made of a piezoelectric material. When using the reflector, an external AC power supply delivers alternating current to the first elastic electrode 21 and the second elastic electrode 22, and the first elastic electrode 21 and the second elastic electrode can be connected to each other. An alternating voltage is generated on the elastic electrode 22, so that an alternating electric field is formed between the first elastic electrode 21 and the second elastic electrode 22. Using the principle of the inverse piezoelectric effect of the piezoelectric material, the positive and negative charges in the piezoelectric material are Under the action of the electric field force, the piezoelectric material is separated from each other, so that the piezoelectric material generates spontaneous strain, and at the same time, the voltage between the first elastic electrode 21 and the second elastic electrode 22 is constantly changing, and the voltage between the first elastic electrode 21 and the second elastic electrode 22 can be changed. The polarization direction, so that the piezoelectric element 23 can shrink or expand along the Z axis. When the piezoelectric element 23 contracts or expands along the Z axis, the piezoelectric element 23 can swing around the X axis through cooperation with the fixed structure 1 .

Wherein, as shown in FIG. 2, in this embodiment, the first reflector 3 is arranged on the surface of the piezoelectric element 23, and the piezoelectric element 23 can drive the first reflector 3 while the piezoelectric element 23 is swinging around the X axis. Simultaneously swing around the X-axis. In addition, the piezoelectric element 23 abuts between the first elastic electrode 21 and the second elastic electrode 22. When the piezoelectric element 23 is swinging, the first elastic electrode 21 and the second elastic electrode The electrodes 22 store force at the same time. On the contrary, during the swinging process of the piezoelectric element 23 , the elastic forces of the first elastic electrode 21 and the second elastic electrode 22 act on the piezoelectric element 23 , so that the piezoelectric element 23 swings rapidly. Of course, in other embodiments, the first reflector 3 can also be arranged on the surface of the first elastic electrode 21 or the second elastic electrode 22, since the piezoelectric element 23 is in contact with the first elastic electrode 21 and the second elastic electrode 22, when the piezoelectric element 23 swings around the X-axis, the first elastic electrode 21 and the second elastic electrode 22 also swing with the piezoelectric element 23, so that the first elastic electrode 21 or the second elastic electrode 22 on the A reflector 3 swings synchronously.

The light is irradiated onto the first reflector 3 on the surface of the piezoelectric element 23, and the first reflector 3 is constantly swinging under the drive of the piezoelectric element 23, so the incident point and angle of incidence of the light on the surface of the first reflector 3 are constantly changing, Referring to FIG. 3 , for example, when the first reflector 3 swings between the first position and the second position, when the first reflector 3 is in the first position, the incident light L on the surface of the first reflector 3 at the incident point is a, the incident angle is α, the reflected light L1 is formed by the reflection of the first reflector 3; when the first reflector 3 is in the second position, the first reflector 3 is driven by the piezoelectric element 23 to swing around the X-axis To the second position, the incident point of the incident ray L on the surface of the first reflector 3 is b, the incident angle is β, and the reflection of the first reflector 3 forms the reflected ray L2; it can be seen that the incident ray L passes through the first reflection The swing of the member 3 makes the incident point and angle of incident light on the first reflective member 3 constantly change.

The reflection device provided in the embodiment of the present application uses the alternating electric field generated by the first elastic electrode 21 and the second elastic electrode 22, and utilizes the principle of the inverse piezoelectric effect of the piezoelectric material, so that the piezoelectric element 23 continuously swings around the X-axis, The electric element 23 can drive the first reflector 3 to continuously swing around the X axis, so that the incident point of the incident light on the first reflector 3 is constantly changed, thereby changing the incident angle of the incident light, thereby changing the reflection direction of the reflected light , realize the diffusion of light; at the same time, the electric field generated by the first elastic electrode 21 and the second elastic electrode 22 causes the piezoelectric element 23 to swing repeatedly, and during the swing process of the piezoelectric element 23, the first elastic electrode 21 and the second elastic electrode The elastic electrodes 22 all store force. When the piezoelectric element 23 changes the swing direction, the elastic force of the first elastic electrode 21 and the second elastic electrode 22 will drive the piezoelectric element 23 to swing rapidly, so that the swing frequency of the piezoelectric element 23 Speed up, so that the light irradiated on the first reflector 3 is fully diffused, preventing dazzling spots on the screen.

Optionally, the piezoelectric material is set to be quartz crystal, lithium gallate, lithium germanate, titanium germanate, iron transistor lithium niobate, lithium tantalate or piezoelectric ceramics.

Optionally, the first reflector 3 is configured as an optical lens, reflective coating or reflective coating, and the like.

Specifically, when the first reflector 3 is set as a reflective coating, the first reflector 3 is a reflective film, and the reflective film includes a metal reflective film, an all-dielectric reflective film, and a metal-dielectric reflective film; wherein the metal reflective film is made of aluminum (Al), Made of silver (Ag), gold (Au), etc.; the all-dielectric reflective film includes amorphous silicon, etc.; when the first reflector 3 is a reflective coating, the reflective coating includes solar shielding paint, solar reflective paint, and space heat insulation paint , energy-saving thermal insulation coatings, infrared camouflage cooling coatings, etc.

In one embodiment of the present application, please refer to FIG. 1 , FIG. 2 and FIG. 4 , the piezoelectric element 23 is configured to protrude from opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, The fixed structure 1 has a first limiting portion 11 and a second limiting portion 12, the first limiting portion 11 and the second limiting portion 12 are respectively arranged on opposite sides of the piezoelectric element 23 along the Z axis, the first limiting portion The portion 11 and the second limiting portion 12 are spaced apart along the Y-axis, and are used to respectively limit the piezoelectric element 23 protruding from opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y-axis.

Specifically, the piezoelectric element 23 is configured to protrude from opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, wherein the piezoelectric element 23 protrudes from the first elastic electrode 21 and the second elastic electrode 22 along the Y axis. The opposite ends of the second elastic electrode 22 are the first end 231 and the second end 232 respectively, and the first elastic electrode 21 and the second elastic electrode 22 are arranged between the first end 231 and the second end 232 On opposite sides of the piezoelectric element 23 between them along the Z axis, the piezoelectric element 23 cooperates between the first elastic electrode 21 and the second elastic electrode 22, so that the first end 231 abuts against the first stopper 11. The second end portion 232 abuts against the second limiting portion 12; for example, referring to FIG. 4 , when the piezoelectric element 23 expands, the thickness of the piezoelectric element 23 increases, and the first end portion 231 of the piezoelectric element 23 Under the action of the first limiting portion 11 , the first end portion 231 generally swings in a direction away from the first limiting portion 11 , and the second end portion 232 of the piezoelectric element 23 is under the action of the second limiting portion 12 , The second end portion 232 generally swings away from the second limiting portion 12, so that the piezoelectric element 23 can swing clockwise around the X-axis, and at the same time, the first elastic electrode 21 and the second elastic electrode 22 undergo elastic deformation. Carry out power storage; when the piezoelectric element 23 shrinks, the thickness of the piezoelectric element 23 decreases, and the elastic force of the first elastic electrode 21 and the second elastic electrode 22 acts on the piezoelectric element 23, so that the piezoelectric element 23 circles X The shaft swings counterclockwise, so that the first end portion 231 of the piezoelectric element 23 abuts against the first limiting portion 11 , and the second end portion 232 abuts against the second limiting portion 12 .

In this way, through the first stopper 11 and the second stopper 12, when the piezoelectric element 23 expands, the piezoelectric element 23 can swing clockwise around the X-axis, and when the piezoelectric element 23 contracts, the first Under the action of the elastic electrode 21 and the second elastic electrode 22, the piezoelectric element 23 can swing counterclockwise around the X-axis, so that the piezoelectric element 23 can repeatedly swing around the X-axis; in addition, the piezoelectric element 23 When expanding, the first elastic electrode 21 and the second elastic electrode 22 can store force, and when the piezoelectric element 23 contracts, the elastic force acts on the piezoelectric element 23, so that the piezoelectric element 23 can swing counterclockwise around the X axis At the same time, the swing of the piezoelectric element 23 can be accelerated, so that the swing frequency of the piezoelectric element 23 can be accelerated.

In one embodiment of the present application, referring to FIG. 1 , FIG. 2 and FIG. 4 , the first elastic electrode 21 includes a first elastic piece 211 and a first elastic portion 212 , and the first elastic portion 212 is connected to the first elastic piece 211 and the fixing structure. 1, the second elastic electrode 22 includes a second elastic piece 221 and a second elastic part 222, the second elastic part 222 is connected between the second elastic piece 221 and the fixed structure 1, and is spaced apart from the first elastic part 212, pressing The electrical element 23 abuts between the first elastic piece 211 and the second elastic piece 221 along the Z axis.

Specifically, the first elastic piece 211, the first elastic part 212, the second elastic piece 221 and the second elastic part 222 are all arranged in the fixed structure 1, and the piezoelectric element 23 abuts against the first elastic piece 211 and the second elastic piece along the Z axis. Between the two elastic pieces 221, when the piezoelectric element 23 expands, the piezoelectric element 23 swings around the X axis. During the swing process, the piezoelectric element 23 can drive the first elastic piece 211 and the second elastic piece 221 to swing simultaneously. The first elastic piece 211 Connected to the first elastic part 212, the second elastic piece 221 is connected to the second elastic part 222. When the first elastic piece 211 and the second elastic piece 221 swing, they can drive the first elastic part 212 and the second elastic part 222 to swing. The elastic piece 211 and the second elastic piece 221 undergo elastic deformation and store elastic force. At the same time, the first elastic part 212 and the second elastic part 222 undergo elastic deformation, and the first elastic part 212 and the second elastic part 222 also store elastic force. ; When the piezoelectric element 23 contracts, the first elastic portion 212 and the second elastic portion 222 are elastically deformed, the first elastic portion 212 acts on the first elastic piece 211 with the stored elastic force, and the elastic force stored in the second elastic portion 222 Acting on the second elastic piece 221, and so on, the first elastic piece 211 acts on the piezoelectric element 23 with the elastic force of the first elastic part 212 and its own elastic force, and the second elastic piece 221 applies the elastic force of the second elastic part 222 and its own elastic force. The elastic force of the piezoelectric element 23 acts on the piezoelectric element 23, so that the piezoelectric element 23 swings around the X axis, so that the piezoelectric element 23 abuts between the first limiting portion 11 and the second limiting portion 12.

So set, when the piezoelectric element 23 expands, the first elastic piece 211, the first elastic portion 212, the second elastic piece 221 and the second elastic portion 222 can store elastic force, and when the piezoelectric element 23 contracts, the first elastic piece 211, the first elastic part 212, the second elastic piece 221, and the elastic force stored in the second elastic part 222 act on the piezoelectric element 23, so that the piezoelectric element 23 swings around the X-axis quickly, which can speed up the swing efficiency of the piezoelectric element 23 In addition, through the first elastic piece 211, the first elastic part 212, the second elastic piece 221 and the second elastic part 222, the piezoelectric element 23 can always be limited to the first limiting part 11 and the second limiting part 12 between.

In an embodiment of the present application, please refer to FIG. 2 and FIG. 4 , the first elastic portion 212 and the second elastic portion 222 are respectively disposed outside opposite ends of the piezoelectric element 23 along the X-axis.

What needs to be explained here is that in this embodiment, the first elastic part 212 and the second elastic part 222 are set as elastic pieces as an example; of course, in other embodiments, according to actual application requirements, The first elastic part 212 and the second elastic part 222 can also be configured as springs or the like.

Specifically, the first elastic part 212 and the second elastic part 222 are respectively arranged outside the opposite ends of the piezoelectric element 23 along the X-axis, that is, the first elastic piece 211 and the second elastic piece 221 can move along the X-axis of the piezoelectric element 23. The piezoelectric element 23 is fully covered; when the piezoelectric element 23 expands, the first elastic piece 211, the first elastic part 212, the second elastic piece 221 and the second elastic part 222 all store elastic force; when the piezoelectric element 23 shrinks, the first elastic piece 211 The elastic force of an elastic portion 212 and the elastic force of the first elastic piece 211 act on the piezoelectric element 23 along the Z-axis of the piezoelectric element 23, and the elastic force of the second elastic portion 222 and the elastic force of the second elastic piece 221 act on the piezoelectric element 23 along the Z axis. The Z axis of 23 acts on the piezoelectric element 23 .

Such setting prevents that when the first elastic portion 212 and the second elastic portion 222 are arranged as elastic pieces, the partial structure of the first elastic portion 212 and the second elastic portion 222 overlaps with the piezoelectric element 23, resulting in the first elastic portion 212 and the second elastic The length of the part 222 is shortened, so that the elastic force stored in the first elastic part 212 and the second elastic part 222 is reduced, which is not conducive to the rapid swing of the piezoelectric element 23 .

In one embodiment of the present application, please refer to FIG. 2 and FIG. 4 together, the first elastic portion 212 and the second elastic portion 222 are respectively disposed outside the opposite ends of the piezoelectric element 23 along the X-axis, and the first elastic portion 212 and the second elastic portion 222 are curved; the bending direction of the first elastic portion 212 is perpendicular to the Z-axis, and the bending direction of the second elastic portion 222 is perpendicular to the Z-axis.

Specifically, the bending direction of the first elastic part 212 is perpendicular to the Z axis, and the bending direction of the second elastic part 222 is perpendicular to the Z axis. When the piezoelectric element 23 expands, the first elastic part 212 and the second elastic part 222 both wrap The X-axis swings clockwise and elastic deformation occurs simultaneously; when the piezoelectric element 23 contracts, both the second elastic part 222 and the second elastic part 222 swing counterclockwise around the X-axis.

In this way, compared with the bending direction of the first elastic portion 212 and the second elastic portion 222 being perpendicular to other directions, the bending direction of the first elastic portion 212 and the second elastic portion 222 is perpendicular to the Z axis, so that the first elastic portion 212 and the bending direction of the second elastic part 222 are perpendicular to the thickness direction of the fixed structure 1, so that it helps to prolong the length of the first elastic part 212 and the second elastic part 222, thereby helping to increase the length of the first elastic part 212 and the The elastic force stored in the second elastic part 222 helps the first elastic part 212 and the second elastic part 222 to swing in the fixed structure 1 .

In one embodiment of the present application, please refer to FIG. 5 together, the first elastic part 212 is connected to any one of the opposite ends of the first elastic piece 211 along the Y-axis, and the second elastic part 222 is connected to the second elastic piece. 221 any one of the opposite ends along the Y axis.

What needs to be explained here is that, in this embodiment, the first elastic part 212 is connected to the end far away from the second limiting part 12 among the opposite ends of the first elastic piece 211 along the Y-axis, the second elastic part 222 The end connected to the opposite ends of the second elastic piece 221 along the Y-axis is taken as an example for illustration; of course, in other embodiments, according to actual application requirements, the first elastic part 212 can also be connected to The second elastic part 222 can also be connected to the opposite ends of the second elastic piece 221 along the Y axis, which is close to the first limiting part. 11 at one end.

Specifically, in this embodiment, the first elastic part 212 is connected to one end of the opposite ends of the first elastic piece 211 along the Y-axis that is far away from the second limiting part 12 , and the second elastic part 222 is connected to the second elastic piece 221 along the Y-axis. One end of the opposite ends of the Y-axis away from the first stopper 11, so that when the piezoelectric element 23 swings around the X-axis, the end of the first elastic part 212 close to the first elastic piece 211 and the second elastic part 222 close to the first elastic piece 222 One end of the two elastic pieces 221 is located at the free end of the piezoelectric element 23, so the piezoelectric element 23 can drive the first elastic part 212 and the second elastic part 222 to swing relatively substantially, thereby making the first elastic part 212 and the second elastic part 212 The elastic portion 222 stores relatively large elastic force, and acts on the piezoelectric element 23 again when the piezoelectric element 23 contracts.

In this way, by connecting the first elastic part 212 to the end of the opposite ends of the first elastic piece 211 along the Y axis, which is far away from the second limiting part 12, and by connecting the second elastic part 222 to the second elastic piece 221 along the Y axis One end of the opposite ends of the shaft away from the first limiting part 11, so that the swing angle that the first elastic part 212 and the second elastic part 222 can produce in the fixed structure 1 reaches the maximum, so that the first elastic part 212 and the second elastic part 222 The second elastic part 222 can store the maximum elastic force in the fixed structure 1 , and can react against the piezoelectric element 23 , and can further increase the swing efficiency of the piezoelectric element 23 .

In an embodiment of the present application, referring to FIG. 1 and FIG. 2 , the first reflector 3 is disposed on one side of the piezoelectric element 23 along the Z-axis.

Among them, in this embodiment, it is described as an example that the first reflector 3 is provided on the side of the piezoelectric element 23 facing the second elastic piece 221; of course, in other embodiments, according to actual application requirements, the second A reflector 3 can also be disposed on a side of the piezoelectric element 23 facing the first elastic piece 211 .

Specifically, the piezoelectric element 23 is configured to protrude from the opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, and the first reflector 3 is arranged on the piezoelectric element 23 extending along the Y axis. Due to the surface of the opposite sides of the first elastic electrode 21 and the second elastic electrode 22, in this embodiment, the number of the first reflector 3 can be set to one or two; when the number of the first reflector 3 When provided as one, the first reflector 3 is arranged on either side of the piezoelectric element 23 protruding from the opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis; when the first reflector 3 When the number is set to two, the two first reflectors 3 are respectively disposed on the opposite sides of the piezoelectric element 23 protruding from the first elastic electrode 21 and the second elastic electrode 22 along the Y axis.

In this way, the first reflector 3 is arranged on the surface of the piezoelectric element 23, and the piezoelectric element 23 can drive the first reflector 3 to swing while the piezoelectric element 23 is swinging, so that the incident point of the incident light is on the surface of the first reflector 3. can change the incident angle of the incident light, thereby changing the reflection direction of the reflected light and realizing the diffusion of the light; in addition, when the incident light is set to multiple beams, it can Direction, the corresponding first reflector 3 is provided on the surface of the piezoelectric element 23, which helps to improve the convenience of use.

In one embodiment of the present application, please refer to FIG. 1 , FIG. 2 and FIG. 4 , a movable chamber 13 is provided in the fixed structure 1 , and the movable chamber 13 has an opening 14 ; the piezoelectric element 23 , the first reflector 3 , the first At least part of the elastic electrode 21 and at least part of the second elastic electrode 22 are located in the active cavity 13 , the first reflector 3 is facing the opening 14 and can receive or reflect light through the opening 14 .

Specifically, the first elastic electrode 21 and the second elastic electrode 22 are both pierced through the fixed structure 1, so that at least part of the first elastic electrode 21 is located in the movable cavity 13, and the remaining part passes through the fixed structure 1 and is located in the movable cavity 13 In addition, at least part of the second elastic electrode 22 is located in the movable cavity 13, and the remaining part passes through the fixed structure 1 and is located outside the movable cavity 13. More specifically, the piezoelectric element 23 is all located in the movable cavity 13, and can 13 to swing around the X-axis, the first elastic piece 211 and the second elastic piece 221 are located on opposite sides of the piezoelectric element 23 along the Z-axis, and can follow the piezoelectric element 23 to swing around the X-axis.

So set, the piezoelectric element 23, the first reflector 3, at least part of the first elastic electrode 21 and at least part of the second elastic electrode 22 are all located in the movable cavity 13, when the piezoelectric element 23 swings, the first The reflector 3, at least part of the first elastic electrode 21 and at least part of the second elastic electrode 22 can swing in the movable cavity 13, preventing the fixed structure 1 from pairing the piezoelectric element 23, the first reflector 3, and the first elastic electrode. At least part of 21 and at least part of the second elastic electrode 22 cause interference, resulting in failure to swing; in addition, the incident light can be irradiated to the first reflector 3 through the opening 14, and the reflected light is emitted through the opening 14.

Optionally, referring to FIG. 1 and FIG. 2 , the first elastic electrode 21 further includes a first fixing portion 213 , the first fixing portion 213 is connected to the end of the first elastic portion 212 away from the first elastic piece 211 , and is connected to the fixing structure 1 The second elastic electrode 22 also includes a second fixing portion 223 , the second fixing portion 223 is connected to the end of the second elastic portion 222 away from the second elastic piece 221 , and is connected to the fixing structure 1 .

Specifically, both the first fixed part 213 and the second fixed part 223 are connected to the fixed structure 1 and pass through the fixed structure 1. The first fixed part 213 and the second fixed part 223 are arranged at intervals, and the first fixed part 213 is arranged on a movable The end outside the chamber 13 and the end of the second fixed part 223 arranged outside the movable chamber 13 are electrically connected to the external AC power supply, and the end of the first fixed part 213 arranged in the movable chamber 13 and the first elastic part 212 are far away from the first elastic piece One end of 211 is fixedly connected, and the second fixed portion 223 is arranged at one end in the movable cavity 13 and the second elastic portion 222 is fixedly connected with the end away from the second elastic piece 221, that is, the first elastic portion 212, the first elastic piece 211, the piezoelectric element 23. The second elastic piece 221 and the second elastic part 222 are located in the movable chamber 13, the first fixed part 213, the first elastic part 212, the first elastic piece 211, the piezoelectric element 23, the second elastic piece 221, the second elastic part 222 and the second fixing part 223 can form a loop.

In this way, through the first fixing part 213 and the second fixing part 223, the first elastic part 212, the first elastic piece 211, the piezoelectric element 23, the second elastic piece 221 and the second elastic part 222 can communicate with the external AC power supply; In addition, the first elastic part 212 and the second elastic part 222 can also be fixed.

Optionally, the fixed structure 1 includes a housing 15 and a cover 16 , the cover 16 is detachably arranged on the housing 15 and encloses with the housing 15 to form the movable chamber 13 .

Specifically, the first fixing part 213 and the second fixing part 223 pass through the housing 15, that is, the first elastic part 212, the first elastic piece 211, the piezoelectric element 23, the second elastic piece 221 and the second elastic part 222 are all located In the movable chamber 13 , the first elastic part 212 , the first elastic piece 211 , the piezoelectric element 23 , the second elastic piece 221 and the second elastic part 222 can swing around the X-axis in the movable chamber 13 .

Optionally, referring to FIG. 4 , a transparent layer 17 is provided on the surface of the cover body 16 .

Wherein, the transparent layer 17 is set as transparent glass, transparent plastic, transparent PVC board and the like.

In this way, the light can be irradiated to the first reflector 3 through the transparent layer 17, and the reflected light that passes through the first reflector 3 through the transparent layer 17 can prevent the shell 15 and the cover 16 from enclosing and forming The active cavity 13 communicates with the external space, which helps to further prolong the service life of the piezoelectric element 23 .

In one embodiment of the present application, please refer to FIG. 1 and FIG. 2 together. The vibrating assembly 2 includes more than three elastic electrodes spaced along the Z-axis. The electric element 23, and any two adjacent elastic electrodes are the first elastic electrode 21 and the second elastic electrode 22 respectively.

Specifically, the vibrating component 2 includes more than three elastic electrodes spaced along the Z-axis, that is, two or more piezoelectric elements 23 are arranged, and when there are two or more piezoelectric elements 23, for example, when When there are two piezoelectric elements 23, a first elastic electrode 21 is provided between the two piezoelectric elements 23, and a second elastic electrode is provided on the side of the two piezoelectric elements 23 facing away from the first elastic electrode 21. 22. By adjusting the number of piezoelectric elements 23 and elastic electrodes, different numbers of piezoelectric elements 23 have different thicknesses. When it is necessary to adjust the angle of piezoelectric elements 23 in the fixed structure 1, multiple piezoelectric elements 23 are stacked on the first Between the first limiting portion 11 and the second limiting portion 12, by adjusting the number of piezoelectric elements 23, the thicknesses of the plurality of piezoelectric elements 23 are changed, for example, when two piezoelectric elements 23 are provided, the two A piezoelectric element 23 is limited between the first limiting part 11 and the second limiting part 12, and at this moment, the two piezoelectric elements 23 are in a horizontal state; when the piezoelectric element 23 is set to three, the three piezoelectric elements The thickness of the element 23 is greater than the thickness of the three piezoelectric elements 23 , and the three piezoelectric elements 23 are limited between the first limiting portion 11 and the second limiting portion 12 .

In this way, by arranging different numbers of piezoelectric elements 23 and elastic electrodes, the total thickness of a plurality of piezoelectric elements 23 stacked can be adjusted, and the angle of the piezoelectric elements 23 in the fixed structure 1 can be further adjusted. The diffusion range of the light is further increased, and the convenience of use is improved.

The present application also provides a projection device, as shown in Figure 6, including a reflection device and a projector body 4, the reflection device is arranged on the projector body 4, the projection device includes a projection plane 5, and the projection plane 5 is used to receive the light emitted from the reflection device. The optical signal and project it.

Specifically, in this embodiment, the optical signal is set as a projection light, and the projection light emitted from the projector body 4 is irradiated to the reflection device. The light can be projected onto the projection plane 5, and projected on the projection plane 5 to form a projection picture; in addition, by controlling the on and off actions of the projection light, different projection pictures can be formed, for example, when the projection light is on and off When the action is set to "on, off, on, off, on...", it can form continuous and uninterrupted projection points; when the on and off action of the projection light is set to "on, on, off, on, on, off... ", the projection line can be formed; when the on-off action of the projection light is set to always on, the projection surface can be formed; when the on-off action of the projection light is set to "on, off, on, on, off, on, on, Bright...", the projection screen can be converted from the projection point to the projection line, and from the projection line to the projection surface.

Compared with the prior art, the projection equipment provided by the embodiment of the present application diffuses the projection light of the projector body 4 through the reflection device, so that the projection light is fully diffused and prevents dazzling spots from appearing on the projection screen; in addition, it also Different types of projection screens can be formed.

In another embodiment of the present application, please refer to Fig. 1 and Fig. 6 together, the number of reflectors is set to be multiple, and the reflectors are distributed at intervals, and a second reflector is arranged between any adjacent two reflectors. Two reflectors 6, the second reflector 6 is configured to reflect the light emitted by the first reflector 3 of one of the reflectors to the first reflector 3 of the other reflector;

Or, any adjacent three reflective devices are arranged at intervals, and any one of them is located between the light-emitting sides of the other two reflective devices, and any one of the reflective devices is configured to reflect one of the other two reflective devices. The optical signal emitted by the first reflector 3 of the device is reflected to the first reflector 3 of another reflector.

Specifically, when there is a second reflector 6 between any two adjacent reflection devices, any one of any two adjacent reflection devices can diffuse the optical signal for the first time, and will pass through the first The diffused optical signal is emitted to the second reflector 6, and the second reflector 6 can reflect the optical signal diffused for the first time to another reflective device. In this process, the transmission distance of the optical signal is increased, so that the optical signal The diffusion angle of the optical signal increases, and when the optical signal reflected by the second reflector 6 is transmitted to another reflection device, the optical signal can be diffused for the second time, so that the diffusion angle of the optical signal is further increased; when any adjacent Another reflector is provided between the two reflectors, that is, any one of them is located between the light-emitting sides of the other two reflectors, so that for any three adjacent reflectors, the direction of the light-emitting sides of any two of them Be consistent, that is, the direction of the light-emitting side of the last one is different from that of any two of them, and the first reflector 3 of one of the reflection devices whose light-emitting side directions of any two of them are consistent can diffuse the optical signal for the first time, and The optical signal after the first diffusion is output to the reflection device whose direction on the light-emitting side is different from any two of them, and the reflection device can perform a second diffusion on the optical signal, and output the optical signal after the second diffusion to any two The first reflector 3 of the other reflector whose light-emitting side direction is kept consistent, and diffuses the optical signal for the third time.

With such arrangement, the light can be diffused multiple times through the plurality of reflecting devices and the second reflecting member 6 , and in the actual application process, the diffusion angle of the light can be adjusted according to actual needs, which helps to improve the convenience of use.

In another embodiment of the present application, referring to FIG. 6 and FIG. 7 , the swing axes of the piezoelectric elements 23 of two adjacent reflection devices are parallel.

What needs to be explained here is that in this embodiment, the number of reflecting devices is set to two as an example; of course, in other embodiments, according to actual use requirements, the reflecting devices can also be set to other quantity.

Specifically, in this embodiment, the number of reflecting devices is set to two, and the projected light of the projector body 4 is first irradiated to one of the reflecting devices, and the projected light is reflected by one of the reflecting devices, so that the projected light can be first secondary diffusion, the projected light diffused for the first time is irradiated to the second reflector 6, and the second reflector 6 reflects the projected light diffused for the first time to another reflection device, and the projected light diffused for the first time passes through the second reflector 6 Two reflectors 6 can increase the projection light angle, and another reflector can diffuse the projected laser light for the second time; for example, referring to Fig. When swinging between the two positions, when the first reflector 3 is at the first position, the projected light S is reflected by the first reflector 3 to form the projected light S1; when the first reflector 3 is at the second position, the projected light S1 S is reflected by the first reflector 3 to form a projection ray S2, wherein the angle between the projection ray S1 and the projection ray S2 is α1; when another first reflector 3 swings between the first position and the second position , when the other reflector is in the first position, the projection ray S1 is reflected by the first reflector 3 to form the projection ray S11, when the other first reflector 3 is in the second position, the projection ray S2 passes through the first reflector The reflection of 3 forms projection ray S21, wherein the angle between projection ray S11 and projection ray S21 is β1, as can be seen from the figure, α1 is smaller than β1, and projection ray S, projection ray S1, projection ray S2, projection ray S11, projection The light rays S21 are all located in the same plane.

In this way, the projection light is diffused multiple times through multiple reflection devices, which can increase the diffusion angle of the projection laser, that is, increase the diffusion area, and the diffusion angle of the projection laser is proportional to the number of times the projection laser diffuses; In addition, the swing axes of the piezoelectric elements 23 of two adjacent reflectors are parallel, and the diffusion directions of the projected light are in the same plane, so that the projected light can be diffused in one direction, which helps to improve the convenience of use.

In another embodiment of the present application, please refer to FIG. 8 , the light received by the projection plane 5 and the projection plane 5 form an included angle smaller than 90°.

What needs to be explained here is that in this embodiment, the angle γ between the projection plane 5 and the received light is set as 9° and 18° as an example; of course, in other embodiments, According to actual application requirements, the angle of γ can also be set to 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 10°, 11°, 12°, 13°, 14° , 15°, 16°, 17°, 18°, 19°, ..., 87°, 88° or 89°, which are not limited here.

Specifically, in this embodiment, the number of reflection devices is set as one as an example for illustration. In other embodiments, according to actual application requirements, the number of reflection devices can also be set to other numbers; the first reflector of the reflection device The member 3 can swing between the first position and the second position. For example, when the first reflector 3 is in the first position, the projected light M is reflected by the first reflector 3 to form the projected light M1; When the component 3 is in the second position, the projection ray M is reflected by the first reflector 3 to form the projection ray M2, the angle between the projection ray M1 and the projection plane 5 is 9°, and the angle between the projection ray M2 and the projection plane 5 is 18°.

In this way, compared with the angle between the projection plane 5 and the light emitted by the reflection device in the prior art that is greater than 90°, when the angle between the projection plane 5 and the light emitted by the reflection device is less than 90° , which can increase the area where the projected laser light is irradiated onto the projection plane 5 after being diffused.

Embodiment two

This embodiment is basically the same as the first embodiment, the only difference being that, as shown in FIG. 2 , the piezoelectric element 23 , the first elastic electrode 21 and the second elastic electrode 22 are all provided with a first reflector 3 on the surface.

Specifically, the surfaces of the piezoelectric element 23, the first elastic electrode 21 and the second elastic electrode 22 are all provided with a first reflector 3, and the piezoelectric element 23 can drive the first elastic electrode 21 and The second elastic electrode 22 oscillates around the X axis at the same time, so that the reflecting device can reflect multiple beams of light at the same time.

In this way, a plurality of first reflectors 3 can move along with the piezoelectric element 23, the first elastic electrode 21 and the second elastic electrode 22 to adjust the reflection direction and angle of the first reflector 3, which can be adjusted according to actual application requirements. Multiple beams of light are reflected at the same time. In this way, multiple beams of light can be diffused at the same time, which improves the utilization rate of the reflection device and helps to improve the convenience of use.

Embodiment three

This embodiment is basically the same as the first embodiment, the only difference being that, as shown in FIG. 2 , the first elastic portion 212 and the second elastic portion 222 are respectively disposed on opposite sides of the piezoelectric element 23 along the Z-axis.

Wherein, in this embodiment, the first elastic part 212 and the second elastic part 222 are springs, and the first elastic part 212 and the second elastic part 222 are generally extended along the Z-axis, and are used to provide an elastic force substantially parallel to the Z-axis In other embodiments, according to actual application requirements, the first elastic part 212 and the second elastic part 222 can also be set as tension springs, elastic sheets, etc.

Specifically, the first elastic portion 212 and the second elastic portion 222 are respectively provided on opposite sides of the piezoelectric element 23 along the Z-axis, wherein the first elastic portion 212 abuts between the first elastic piece 211 and the fixed structure 1 , The second elastic part 222 abuts between the second elastic piece 221 and the fixed structure 1; when the piezoelectric element 23 expands, the piezoelectric element 23 swings clockwise around the X axis, and the two sides of the piezoelectric element 23 and the fixed structure 1 The distance between the first elastic part 212 and the second elastic part 222 is shortened, and at this time, both the first elastic part 212 and the second elastic part 222 are in a compressed state, and store elastic force at the same time; when the piezoelectric element 23 contracts, the piezoelectric element 23 swings counterclockwise around the X axis, and the piezoelectric element 23 The distance between both sides of the element 23 and the fixed structure 1 increases, and at this time the first elastic part 212 and the second elastic part 222 are in an extended state, and the stored elastic force can act on the piezoelectric element 23 .

In this way, when the piezoelectric element 23 expands, the first elastic part 212 and the second elastic part 222 can store elastic force, and when the piezoelectric element 23 contracts, the stored elastic force acts on the piezoelectric element 23, so that The piezoelectric element 23 quickly swings around the X axis, which can speed up the swing efficiency of the piezoelectric element 23; in addition, the piezoelectric element 23 can always be limited to the first limit by the first elastic part 212 and the second elastic part 222. Between the position part 11 and the second limit part 12.

Embodiment four

This embodiment is basically the same as the first embodiment, the only difference being that, as shown in FIG. 2 , first reflectors 3 are provided on opposite sides of the piezoelectric element 23 along the Z-axis.

Specifically, the piezoelectric element 23 is provided with first reflectors 3 on opposite sides of the Z-axis, and the piezoelectric element 23 is configured to protrude from the opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y-axis. Therefore, in this embodiment, the number of first reflectors 3 can be set to two or four; when the number of first reflectors 3 is set to two, the two first reflectors 3 are separately arranged on On opposite sides of the piezoelectric element 23 along the Z-axis, one of the first reflectors 3 is arranged on one side of the piezoelectric element 23 along the Z-axis, and one of the first reflectors 3 is arranged on this side and protrudes along the Y-axis On either side of the opposite sides of the first elastic electrode 21 and the second elastic electrode 22, another first reflector 3 is arranged on the other side of the piezoelectric element 23 along the Z axis, and another first reflector 3 3 is located on the other side of the piezoelectric element 23 along the Z-axis, and another first reflector 3 is located on this side and protrudes from the opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y-axis any side of the Z-axis; when the number of the first reflector 3 is set to four, the four first reflectors 3 are respectively arranged on the opposite sides of the piezoelectric element 23 along the Z-axis, and along the opposite sides of the Z-axis along the Y The shaft protrudes from the first elastic electrode 21 and the opposite sides of the second elastic electrode 22 are provided with first reflectors 3 .

In this way, when multiple incident light beams are set, corresponding first reflectors 3 can be provided on the surface of the piezoelectric element 23 according to the quantity and incident direction of the incident light rays, which helps to improve the convenience of use.

Embodiment five

This embodiment is basically the same as the first embodiment, the only difference being that, as shown in FIGS. 9 to 12 , the swing axes of the piezoelectric elements 23 of two adjacent reflection devices form a preset angle.

What needs to be explained here is that in this embodiment, the number of reflecting devices is set to two as an example; of course, in other embodiments, according to actual use requirements, the reflecting devices can also be set to other quantity.

Wherein, in this embodiment, it is explained by taking the swing axes of the piezoelectric elements 23 of two adjacent reflection devices to form a preset angle of 90° as an example; of course, in other embodiments, according to the actual According to application requirements, the preset included angle can also be set to other angles, for example, the preset included angle can be set to all angles between 1°-89°.

Specifically, in this embodiment, the preset included angle is 90°, that is, the length direction of one of the two adjacent reflection devices is perpendicular to the length direction of the other, for example, the projected light N hits one of the reflection devices On the first reflector 3, the first reflector 3 can swing between the first position and the second position. When the first reflector 3 is in the first position, the projection light N is reflected by the first reflector 3 to form Projection light N1; when the light reflector is in the second position, the projection light N is reflected by the first reflector 3 to form projection light N2; it can be seen that the projection light N1 and the projection light N2 are in the same plane; another reflection device The swing axis of one of the reflectors is vertical, so that the diffusion direction of the projection light N can be changed, the projection light N1 and the projection light N2 are irradiating to another reflector while swinging, and the other first reflector 3 can Swing between the first position and the second position. When the other first reflector 3 is in the first position, the projected light N1 is reflected to form the projected light N11, and the projected light N2 is reflected to form the projected light N21. When the reflector 3 is in the second position, the projected light N1 is reflected to form the projected light N12, and the projected light N2 is reflected to form the projected light N22. It can be seen that the first diffusion direction is different from the second diffusion direction.

So set, the swing axes of the piezoelectric elements 23 of the two adjacent reflectors, the projected light can be diffused in one direction through one of the reflectors, and can be diffused in the other direction through the other reflector, so as to realize the projection light Diffusion in different directions helps to improve ease of use.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the protection of the application. within range.

Claims (13)

1. A reflective device, comprising:

a fixed structure;

the vibration assembly comprises a first elastic electrode, a second elastic electrode and a piezoelectric element, the first elastic electrode and the second elastic electrode are arranged on the fixed structure at intervals, the piezoelectric element is abutted between the first elastic electrode and the second elastic electrode along a Z axis and can swing around an X axis under the action of an electric field generated by the cooperation of the first elastic electrode and the second elastic electrode;

a first reflector configured to be movable with the piezoelectric element, the first elastic electrode, and/or the second elastic electrode to adjust a reflection direction and an angle of the first reflector.

2. The reflection apparatus as claimed in claim 1, wherein the piezoelectric element is configured to extend out of two opposite sides of the first elastic electrode and the second elastic electrode along a Y-axis, the fixing structure has a first position-limiting portion and a second position-limiting portion, the first position-limiting portion and the second position-limiting portion are respectively disposed on two opposite sides of the piezoelectric element along a Z-axis, and the first position-limiting portion and the second position-limiting portion are spaced along the Y-axis and are respectively used for limiting two opposite sides of the piezoelectric element extending out of the first elastic electrode and the second elastic electrode along the Y-axis.

3. The reflection apparatus according to claim 1, wherein the vibration element includes three or more elastic electrodes spaced apart from each other along the Z-axis, the piezoelectric element is abutted between any two adjacent elastic electrodes, and the first elastic electrode and the second elastic electrode are respectively provided between any two adjacent elastic electrodes.

4. The reflection apparatus according to claim 1, wherein the first elastic electrode includes a first elastic piece and a first elastic portion, the first elastic portion is connected between the first elastic piece and the fixing structure, the second elastic electrode includes a second elastic piece and a second elastic portion, the second elastic portion is connected between the second elastic piece and the fixing structure and spaced apart from the first elastic portion, and the piezoelectric element abuts against between the first elastic piece and the second elastic piece along the Z axis.

5. The reflection apparatus according to claim 4, wherein the first elastic portion and the second elastic portion are respectively provided outside of opposite ends of the piezoelectric element along an X-axis, or wherein the first elastic portion and the second elastic portion are respectively provided outside of opposite sides of the piezoelectric element along a Z-axis.

6. The reflection apparatus according to claim 4, wherein the first elastic portion and the second elastic portion are respectively provided outside opposite ends of the piezoelectric element along the X-axis, and both the first elastic portion and the second elastic portion are curved; the bending direction of the first elastic part is perpendicular to the Z axis, and/or the bending direction of the second elastic part is perpendicular to the Z axis.

7. The reflection apparatus as claimed in claim 4, wherein said first elastic portion is connected to any one of two opposite ends of said first resilient plate along the Y-axis, and said second elastic portion is connected to any one of two opposite ends of said second resilient plate along the Y-axis.

8. The reflection apparatus according to any one of claims 1 to 7, wherein the first reflection member is provided on one side of the piezoelectric element along the Z-axis; or the first reflecting pieces are arranged on two opposite sides of the piezoelectric element along the Z axis.

9. The reflective device according to any of claims 1 to 7, wherein a movable cavity is provided in the fixed structure, the movable cavity having an opening; the piezoelectric element, the first reflector, at least part of the first elastic electrode and at least part of the second elastic electrode are all located in the movable cavity, and the first reflector is opposite to the opening and can receive or reflect light through the opening.

10. A projection apparatus, comprising the reflection device according to any one of claims 1 to 9 and a projector body, wherein the reflection device is disposed on the projector body, and the projection apparatus comprises a projection plane for receiving the light signal emitted from the reflection device and projecting the light signal.

11. The projection apparatus according to claim 10, wherein the number of the reflection devices is plural, a plurality of the reflection devices are distributed at intervals, a second reflection member is disposed between any two adjacent reflection devices, and the second reflection member is configured to reflect the light emitted from the first reflection member of one of the reflection devices to the first reflection member of the other of the reflection devices;

or, any adjacent three reflecting devices are arranged at intervals, and any one of the three reflecting devices is located between the light emergent sides of the other two reflecting devices, wherein any one of the reflecting devices is configured to reflect the optical signal emitted by the first reflecting piece of one of the other two reflecting devices to the first reflecting piece of the other one of the reflecting devices.

12. The projection apparatus according to claim 11, wherein the oscillation axes of the piezoelectric elements of two adjacent reflection devices are parallel, or the oscillation axes of the piezoelectric elements of two adjacent reflection devices form a predetermined angle.

13. The projection device of claim 10, wherein light received by the projection plane forms an angle with the projection plane of less than 90 °.

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