CN115437204A

CN115437204A - Reflecting device and projection equipment

Info

Publication number: CN115437204A
Application number: CN202211142243.XA
Authority: CN
Inventors: 唐文天
Original assignee: Shenzhen Efun Technology Co ltd
Current assignee: Shenzhen Efun Technology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-12-06

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

Reflecting device and projection equipment

Technical Field

The application belongs to the technical field of projection, and particularly relates to a reflecting device and projection equipment.

Background

The projector usually adopts a laser light source for projection, the laser light source can be divided into two types, one type is monochromatic laser, the other type is three-color laser, and the laser light source is a beam light source, so that the single beam laser light source is required to be diffused to be used for projection; when the laser light source is not sufficiently diffused, a dazzling patch is easily generated on a picture, and the quality of a projected picture is deteriorated.

Disclosure of Invention

An object of the embodiments of the present application is to provide a reflection apparatus and a projection device, so as to solve the technical problem in the prior art that the light source is not sufficiently diffused.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: there is provided a reflection apparatus including:

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.

Optionally, 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 limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively disposed on two opposite sides of the piezoelectric element along a Z axis, and the first limiting portion and the second limiting portion are distributed at intervals along the Y axis and are used for respectively limiting two opposite sides of the piezoelectric element extending out of the first elastic electrode and the second elastic electrode along the Y axis.

Optionally, the vibration assembly includes more than three elastic electrodes distributed at intervals along the Z axis, the piezoelectric element is connected between any two adjacent elastic electrodes in an abutting manner, and the two adjacent elastic electrodes are the first elastic electrode and the second elastic electrode respectively.

Optionally, the first elastic electrode includes a first elastic sheet and a first elastic portion, the first elastic portion is connected between the first elastic sheet and the fixing structure, the second elastic electrode includes a second elastic sheet and a second elastic portion, the second elastic portion is connected between the second elastic sheet and the fixing structure and is spaced from the first elastic portion, and the piezoelectric element abuts against the first elastic sheet and the second elastic sheet along the Z axis.

Optionally, the first elastic portion and the second elastic portion are respectively disposed outside two opposite ends of the piezoelectric element along the X axis, or the first elastic portion and the second elastic portion are respectively disposed outside two opposite sides of the piezoelectric element along the Z axis.

Optionally, the first elastic part and the second elastic part are respectively arranged outside two opposite ends of the piezoelectric element along the X axis, and both the first elastic part and the second elastic part 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.

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

Optionally, the first elastic electrode further includes a first fixing portion, and the first fixing portion is connected to one end of the first elastic portion, which is far away from the first elastic sheet, and is connected to the fixing structure;

and/or the second elastic electrode further comprises a second fixing part, and the second fixing part is connected to one end, far away from the second elastic sheet, of the second elastic part and is connected to the fixing structure.

Optionally, the first reflecting piece is arranged 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.

Optionally, a movable cavity is arranged in the fixed structure, and the movable cavity is provided with 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 faces the opening and can receive or reflect light through the opening.

The application also provides a projection equipment, include reflect meter and projector body, the projector body is located to reflect meter, projection equipment includes the projection plane, the projection plane is used for receiving the follow the light of reflect meter outgoing to carry out the projection.

Optionally, the number of the reflection devices is multiple, the multiple reflection devices are distributed at intervals, a second reflection piece is arranged between any two adjacent reflection devices, and the second reflection piece is configured to reflect the light emitted by the first reflection piece of one of the reflection devices to the first reflection piece of the other reflection device;

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, and any one of the three 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 two reflecting devices.

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

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

The application provides a reflex device's beneficial effect lies in:

according to the reflecting device provided by the application, the piezoelectric element continuously swings around the X axis by utilizing the inverse piezoelectric effect principle of the piezoelectric material through the alternating electric field generated by the first elastic electrode and the second elastic electrode, the piezoelectric element can drive the first reflecting piece to continuously swing around the X axis, so that the incident point of incident light on the first reflecting piece is continuously changed, the incident angle of the incident light can be further changed, the reflecting direction of the reflected light can be changed, and the light can be diffused; meanwhile, the piezoelectric element swings repeatedly due to electric fields generated by the first elastic electrode and the second elastic electrode, the first elastic electrode and the second elastic electrode accumulate force in the swinging process of the piezoelectric element, and the elastic force of the first elastic electrode and the elastic force of the second elastic electrode drive the piezoelectric element to swing quickly in the swinging direction changing process of the piezoelectric element, so that the swinging frequency of the piezoelectric element is accelerated, light irradiated on the first reflection piece is fully diffused, and a dazzling patch is prevented from appearing on a picture.

The application provides a projection equipment's beneficial effect lies in:

the application provides a projection equipment diffuses through the projection light of reflect meter to the projector body for projection light fully diffuses, prevents that the dazzling patch from appearing in the projection picture.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective view of a reflection apparatus according to an embodiment of the present application;

fig. 2 is a perspective view of a first internal structure of a reflection apparatus according to an embodiment of the present disclosure;

FIG. 3 is a diagram of an optical path of a reflection apparatus according to an embodiment of the present application;

FIG. 4 is a cross-sectional view of a reflective device according to an embodiment of the present application;

FIG. 5 is a perspective view of a second internal structure of a reflection apparatus according to an embodiment of the present disclosure;

fig. 6 is a perspective view of a projection apparatus according to an embodiment of the present application;

fig. 7 is a first optical path diagram of a projection apparatus according to a first embodiment of the present application;

fig. 8 is a second optical path diagram of a projection apparatus according to an embodiment of the present application;

fig. 9 is a perspective view of a projection apparatus provided in a fifth embodiment of the present application;

fig. 10 is a side view of a projection apparatus provided in embodiment five of the present application;

fig. 11 is a top view of a projection apparatus provided in embodiment five of the present application;

fig. 12 is a partial enlarged view at a in fig. 11.

Wherein, in the figures, the various reference numbers:

1. a fixed structure; 11. a first limiting part; 12. a second limiting part; 13. a movable cavity; 14. an opening; 15. a housing; 16. a cover body; 17. a transparent layer;

2. a vibrating assembly; 21. a first elastic electrode; 211. a first spring plate; 212. a first elastic part; 213. a first fixed part; 22. a second elastic electrode; 221. a second elastic sheet; 222. a second elastic part; 223. a second fixed part; 23. a piezoelectric element; 231. a first end portion; 232. a second end portion;

3. a first reflective member;

4. a projector body;

5. a projection plane;

6. a second reflective member.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can 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 be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In view of this, embodiments of the present invention provide a reflection device and a projection apparatus, which can sufficiently diffuse light by the combined action of the piezoelectric element 23 and the elastic electrode.

Example one

As shown in fig. 1 to 2, the present embodiment provides a reflection apparatus, which includes a fixed structure 1, a vibration assembly 2, and a first reflection member 3; the vibration component 2 comprises a first elastic electrode 21, a second elastic electrode 22 and a piezoelectric element 23, wherein the first elastic electrode 21 and the second elastic electrode 22 are arranged on the fixed structure 1 at intervals, and the piezoelectric element 23 abuts between the first elastic electrode 21 and the second elastic electrode 22 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 21 and the second elastic electrode 22; the first reflecting member 3 is configured to be movable with the piezoelectric element 23, the first elastic electrode 21, or the second elastic electrode 22 to adjust the reflecting direction and angle of the first reflecting member 3.

Here, the X axis referred to above and below refers to a bidirectional direction of the X axis defined by the spatial coordinate system, the Y axis referred to below refers to a bidirectional direction of the Y axis defined by the spatial coordinate system, and the Z axis referred to above and below refers to a bidirectional direction of the Z axis defined by the spatial coordinate system.

Specifically, the piezoelectric element 23 is made of a piezoelectric material, and when the reflection device is used, an external alternating current power supply supplies alternating current to the first elastic electrode 21 and the second elastic electrode 22, and alternating voltage can be generated on the first elastic electrode 21 and the second elastic electrode 22, so that an alternating electric field is formed between the first elastic electrode 21 and the second elastic electrode 22, and positive and negative charges in the piezoelectric material are separated from each other under the action of the electric field force by using the inverse piezoelectric effect principle of the piezoelectric material, so that the piezoelectric material generates spontaneous strain, and meanwhile, by using the characteristic that the voltages of the first elastic electrode 21 and the second elastic electrode 22 are constantly changed, the polarization direction between the first elastic electrode 21 and the second elastic electrode 22 can be changed, so that the piezoelectric element 23 can contract or expand along the Z axis. The piezoelectric element 23 can be oscillated about the X-axis by cooperation with the fixed structure 1 while contracting or expanding along the Z-axis.

As shown in fig. 2, in the present embodiment, the first reflective element 3 is disposed on a surface of the piezoelectric element 23, and the piezoelectric element 23 can drive the first reflective element 3 to swing around the X axis while the piezoelectric element 23 swings around the X axis, in addition, the piezoelectric element 23 abuts between the first elastic electrode 21 and the second elastic electrode 22, and the first elastic electrode 21 and the second elastic electrode 22 accumulate force while the piezoelectric element 23 swings, whereas in the swing process of the piezoelectric element 23, 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 swings rapidly. Of course, in other embodiments, the first reflective element 3 may also be disposed on the surface of the first elastic electrode 21 or the second elastic electrode 22, and since the piezoelectric element 23 abuts between 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 along with the piezoelectric element 23, so that the first reflective element 3 on the first elastic electrode 21 or the second elastic electrode 22 swings synchronously.

For example, when the first reflecting member 3 swings between the first position and the second position, when the first reflecting member 3 is located at the first position, the incident point of the incident light L on the surface of the first reflecting member 3 is a, and the incident angle is α, and the first reflecting member 3 reflects the incident light L to form a reflected light L1; when the first reflector 3 is at the second position, the first reflector 3 swings to the second position around the X axis under the driving of the piezoelectric element 23, the incident point of the incident light L on the surface of the first reflector 3 is b, the incident angle is β, and the reflected light L2 is formed by the reflection of the first reflector 3; it can be seen that the incident light L is oscillated by the first reflecting member 3, so that the incident point and the incident angle of the incident light on the first reflecting member 3 are changed continuously.

According to the reflecting device provided by the embodiment of the application, the piezoelectric element 23 continuously swings around the X axis by using the inverse piezoelectric effect principle of the piezoelectric material through the alternating electric field generated by the first elastic electrode 21 and the second elastic electrode 22, and the piezoelectric element 23 can drive the first reflecting piece 3 to continuously swing around the X axis, so that the incident point of the incident light on the first reflecting piece 3 is continuously changed, the incident angle of the incident light can be changed, the reflecting direction of the reflected light can be changed, and the light diffusion is realized; meanwhile, the piezoelectric element 23 swings repeatedly due to the electric fields generated by the first elastic electrode 21 and the second elastic electrode 22, the first elastic electrode 21 and the second elastic electrode 22 both accumulate force during the swinging process of the piezoelectric element 23, and the elastic force of the first elastic electrode 21 and the second elastic electrode 22 drives the piezoelectric element 23 to swing quickly during the process that the piezoelectric element 23 changes the swinging direction, so that the swinging frequency of the piezoelectric element 23 is accelerated, light irradiated on the first reflecting member 3 is fully diffused, and a dazzling patch is prevented from appearing on a picture.

Alternatively, the piezoelectric material is provided as a quartz crystal, lithium gallate, lithium germanate, titanium germanate, lithium iron transistor niobate, lithium tantalate, or a piezoelectric ceramic.

Optionally, the first reflector 3 is provided as an optical lens, a reflective coating or layer, or the like.

Specifically, when the first reflector 3 is a reflective coating, the first reflector 3 is a reflective film, and the reflective film includes a metal reflective film, a full dielectric reflective film, and a metal dielectric reflective film; wherein the metal reflective film is made of aluminum (Al), silver (Ag), gold (Au), etc.; the full dielectric reflecting film comprises amorphous silicon and the like; when the first reflecting member 3 is a reflecting coating, the reflecting coating comprises a solar shielding coating, a solar reflecting coating, a space heat-insulating coating, an energy-saving heat-insulating coating, an infrared camouflage cooling coating and the like.

In an embodiment of the present application, referring to fig. 1, fig. 2, and fig. 4, the piezoelectric element 23 is configured to extend out of two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, the fixing structure 1 has a first position-limiting portion 11 and a second position-limiting portion 12, the first position-limiting portion 11 and the second position-limiting portion 12 are respectively disposed on two opposite sides of the piezoelectric element 23 along the Z axis, and the first position-limiting portion 11 and the second position-limiting portion 12 are distributed at intervals along the Y axis and are used for respectively limiting two opposite sides of the piezoelectric element 23 extending out of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis.

Specifically, the piezoelectric element 23 is configured to extend out of two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, wherein two opposite ends of the piezoelectric element 23 extending out of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis are a first end 231 and a second end 232 respectively, the first elastic electrode 21 and the second elastic electrode 22 are disposed on two opposite sides of the piezoelectric element 23 between the first end 231 and the second end 232 along the Z axis, and the piezoelectric element 23 enables the first end 231 to abut against the first position-limiting part 11 and the second end 232 to abut against the second position-limiting part 12 through cooperation between the first elastic electrode 21 and the second elastic electrode 22; for example, referring to fig. 4, when the piezoelectric element 23 expands, the thickness of the piezoelectric element 23 increases, the first end 231 of the piezoelectric element 23 swings in a direction substantially away from the first stopper portion 11 under the action of the first stopper portion 11, the second end 232 of the piezoelectric element 23 swings in a direction substantially away from the second stopper portion 12 under the action of the second stopper portion 12, and thus 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 are elastically deformed to store force; when the piezoelectric element 23 contracts, 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 to swing the piezoelectric element 23 counterclockwise around the X axis, so that the first end 231 of the piezoelectric element 23 abuts against the first position-limiting portion 11, and the second end 232 abuts against the second position-limiting portion 12.

With the arrangement, when the piezoelectric element 23 expands, the piezoelectric element 23 can swing clockwise around the X axis through the first limiting part 11 and the second limiting part 12, and when the piezoelectric element 23 contracts, the piezoelectric element 23 can swing anticlockwise around the X axis under the action of the first elastic electrode 21 and the second elastic electrode 22, so that the piezoelectric element 23 can swing repeatedly around the X axis; besides, when the piezoelectric element 23 expands, the first elastic electrode 21 and the second elastic electrode 22 can store force, and when the piezoelectric element 23 contracts, elastic force acts on the piezoelectric element 23, so that the piezoelectric element 23 can swing anticlockwise around the X axis, and meanwhile, the swing of the piezoelectric element 23 can be accelerated, and the swing frequency of the piezoelectric element 23 can be accelerated.

In an embodiment of the present application, referring to fig. 1, 2 and 4, the first elastic electrode 21 includes a first elastic sheet 211 and a first elastic portion 212, the first elastic portion 212 is connected between the first elastic sheet 211 and the fixing structure 1, the second elastic electrode 22 includes a second elastic sheet 221 and a second elastic portion 222, the second elastic portion 222 is connected between the second elastic sheet 221 and the fixing structure 1 and is spaced apart from the first elastic portion 212, and the piezoelectric element 23 abuts between the first elastic sheet 211 and the second elastic sheet 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 disposed in the fixing structure 1, the piezoelectric element 23 abuts between the first elastic piece 211 and the second elastic piece 221 along the Z axis, when the piezoelectric element 23 expands, the piezoelectric element 23 swings around the X axis, the piezoelectric element 23 can drive the first elastic piece 211 and the second elastic piece 221 to swing simultaneously in the swinging process, the first elastic piece 211 is 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, the first elastic part 212 and the second elastic part 222 can be driven to swing, the first elastic piece 211 and the second elastic piece 221 elastically deform and store elastic force, meanwhile, the first elastic part 212 and the second elastic part 222 elastically deform, 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 applies the stored elastic force to the first elastic piece 211, the second elastic portion 222 applies the stored elastic force to the second elastic piece 221, and so on, the first elastic piece 211 applies the elastic force of the first elastic portion 212 and the elastic force of the first elastic portion itself to the piezoelectric element 23, and the second elastic piece 221 applies the elastic force of the second elastic portion 222 and the elastic force of the second elastic portion itself to the piezoelectric element 23, so that the piezoelectric element 23 swings around the X axis to enable the piezoelectric element 23 to abut against between the first limiting portion 11 and the second limiting portion 12.

With this arrangement, 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 can store elastic force, and when the piezoelectric element 23 contracts, the elastic force stored in the first elastic piece 211, the first elastic part 212, the second elastic piece 221, and the second elastic part 222 acts on the piezoelectric element 23, so that the piezoelectric element 23 rapidly swings around the X axis, and the swing efficiency of the piezoelectric element 23 can be increased; in addition, the piezoelectric element 23 can be always limited between the first limiting portion 11 and the second limiting portion 12 by the first elastic sheet 211, the first elastic portion 212, the second elastic sheet 221 and the second elastic portion 222.

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

It should be noted that, in the embodiment, the first elastic portion 212 and the second elastic portion 222 are provided as elastic pieces for example; of course, in other embodiments, the first elastic portion 212 and the second elastic portion 222 may be provided as springs or the like according to the actual application requirement.

Specifically, the first elastic portion 212 and the second elastic portion 222 are respectively disposed outside two opposite ends of the piezoelectric element 23 along the X axis, that is, the first elastic sheet 211 and the second elastic sheet 221 can completely cover the piezoelectric element 23 along the X axis of the piezoelectric element 23; when the piezoelectric element 23 expands, the first elastic sheet 211, the first elastic part 212, the second elastic sheet 221 and the second elastic part 222 store elastic force; when the piezoelectric element 23 contracts, the elastic force of the first 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 of the piezoelectric element 23.

With such an arrangement, when the first elastic portion 212 and the second elastic portion 222 are set as elastic pieces, the first elastic portion 212 and the second elastic portion 222 are partially overlapped with the piezoelectric element 23, which results in shortening the lengths of the first elastic portion 212 and the second elastic portion 222, and thus the elastic force stored in the first elastic portion 212 and the second elastic portion 222 is reduced, which is not beneficial to rapid swinging of the piezoelectric element 23.

In an embodiment of the present application, referring to fig. 2 and fig. 4, the first elastic portion 212 and the second elastic portion 222 are respectively disposed outside two opposite ends of the piezoelectric element 23 along the X axis, and both the first elastic portion 212 and the second elastic portion 222 are curved; 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.

Specifically, the bending direction of the first elastic part 212 is perpendicular to the Z axis, the bending direction of the second elastic part 222 is perpendicular to the Z axis, and when the piezoelectric element 23 expands, the first elastic part 212 and the second elastic part 222 both swing clockwise around the X axis while being elastically deformed; when the piezoelectric element 23 contracts, the second elastic portion 222 and the second elastic portion 222 each swing counterclockwise about the X axis.

With this arrangement, the bending direction of the first elastic part 212 and the second elastic part 222 is perpendicular to the Z-axis compared to the bending direction of the first elastic part 212 and the second elastic part 222 being perpendicular to other directions, so that the bending direction of the first elastic part 212 and the second elastic part 222 is perpendicular to the thickness direction of the fixing structure 1, which helps to lengthen the lengths of the first elastic part 212 and the second elastic part 222, thereby helping to increase the elastic force accumulated in the first elastic part 212 and the second elastic part 222, and helping to swing the first elastic part 212 and the second elastic part 222 within the fixing structure 1.

In an embodiment of the present application, referring to fig. 5, the first elastic portion 212 is connected to any one of two opposite ends of the first elastic piece 211 along the Y axis, and the second elastic portion 222 is connected to any one of two opposite ends of the second elastic piece 221 along the Y axis.

It should be noted that, in the present embodiment, the first elastic portion 212 is connected to one of the two opposite ends of the first elastic sheet 211 along the Y axis, which is far from the second position-limiting portion 12, and the second elastic portion 222 is connected to one of the two opposite ends of the second elastic sheet 221 along the Y axis, which is far from the first position-limiting portion 11; of course, in other embodiments, according to practical application requirements, the first elastic portion 212 may also be connected to one end of the two opposite ends of the first elastic piece 211 along the Y axis close to the second position-limiting portion 12, and the second elastic portion 222 may also be connected to one end of the two opposite ends of the second elastic piece 221 along the Y axis close to the first position-limiting portion 11.

Specifically, in this embodiment, the first elastic portion 212 is connected to one end of the two opposite ends of the first elastic sheet 211 along the Y axis, which is far away from the second position-limiting portion 12, and the second elastic portion 222 is connected to one end of the two opposite ends of the second elastic sheet 221 along the Y axis, which is far away from the first position-limiting portion 11, so that when the piezoelectric element 23 swings around the X axis, both the end of the first elastic portion 212 close to the first elastic sheet 211 and the end of the second elastic portion 222 close to the second elastic sheet 221 are located at the free end of the piezoelectric element 23, and therefore the piezoelectric element 23 can drive the first elastic portion 212 and the second elastic portion 222 to swing to a larger extent, so that the first elastic portion 212 and the second elastic portion 222 store a larger elastic force, and when the piezoelectric element 23 contracts, the elastic force acts on the piezoelectric element 23 again.

With such an arrangement, the first elastic portion 212 is connected to one end of the first elastic sheet 211, which is far away from the second limiting portion 12, at two opposite ends along the Y axis, and the second elastic portion 222 is connected to one end of the second elastic sheet 221, which is far away from the first limiting portion 11, at two opposite ends along the Y axis, so that the swing angle generated by the first elastic portion 212 and the second elastic portion 222 in the fixed structure 1 is maximized, and thus the first elastic portion 212 and the second elastic portion 222 can store the maximum elastic force in the fixed structure 1, and can react with the piezoelectric element 23, thereby further increasing the swing efficiency of the piezoelectric element 23.

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

In this embodiment, the first reflective member 3 is disposed on the side of the piezoelectric element 23 facing the second elastic sheet 221; of course, in other embodiments, the first reflective element 3 may also be disposed on a side of the piezoelectric element 23 facing the first elastic sheet 211 according to practical application requirements.

Specifically, wherein the piezoelectric element 23 is configured to extend out of the two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, the first reflecting member 3 is provided at the surface of the piezoelectric element 23 extending out of the two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, and in the present embodiment, the number of the first reflecting members 3 may be set to one or two; when the number of the first reflecting members 3 is set to one, the first reflecting members 3 are provided on either one of the opposite sides of the piezoelectric element 23 extending out of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis; when the number of the first reflection members 3 is two, two first reflection members 3 are respectively provided on the opposite sides of the piezoelectric element 23 extending from the first elastic electrode 21 and the second elastic electrode 22 along the Y axis.

With the arrangement, the first reflecting piece 3 is arranged on the surface of the piezoelectric element 23, and the piezoelectric element 23 can drive the first reflecting piece 3 to swing while swinging, so that the incident point of incident light rays is continuously changed on the first reflecting piece 3, and then the incident angle of the incident light rays can be changed, so that the reflecting direction of the reflected light rays can be changed, and the light rays can be diffused; in addition, when the incident light is provided in a plurality of beams, the corresponding first reflecting members 3 can be provided on the surface of the piezoelectric element 23 according to the number and incident direction of the incident light, which contributes to improvement of convenience in use.

In an embodiment of the present application, referring to fig. 1, fig. 2 and fig. 4, a movable cavity 13 is disposed in the fixed structure 1, and the movable cavity 13 has an opening 14; 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 active cavity 13, the first reflector 3 is opposite to 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 disposed through the fixed structure 1, such that at least a portion of the first elastic electrode 21 is located in the movable cavity 13, and the remaining portion of the first elastic electrode passes through the fixed structure 1 and is located outside the movable cavity 13, at least a portion of the second elastic electrode 22 is located in the movable cavity 13, and the remaining portion of the second elastic electrode passes through the fixed structure 1 and is located outside the movable cavity 13, more specifically, the piezoelectric element 23 is entirely located in the movable cavity 13 and can swing around the X axis in the movable cavity 13, and the first elastic piece 211 and the second elastic piece 221 are respectively disposed on two opposite sides of the piezoelectric element 23 along the Z axis and can swing around the X axis along with the piezoelectric element 23.

With this arrangement, 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, so that when the piezoelectric element 23 swings, the first 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, and the fixed structure 1 is prevented from interfering with 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, which results in a situation where 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 cannot swing; besides, the incident light can be irradiated to the first reflecting member 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, and the first fixing portion 213 is connected to an end of the first elastic portion 212 far away from the first elastic sheet 211 and is connected to the fixing structure 1; the second elastic electrode 22 further includes a second fixing portion 223, and the second fixing portion 223 is connected to one end of the second elastic portion 222 away from the second elastic sheet 221 and is connected to the fixing structure 1.

Specifically, the first fixing portion 213 and the second fixing portion 223 are both connected to the fixed structure 1 and pass through the fixed structure 1, the first fixing portion 213 and the second fixing portion 223 are disposed at an interval, one end of the first fixing portion 213 disposed outside the movable cavity 13 and one end of the second fixing portion 223 disposed outside the movable cavity 13 are both electrically connected to an external ac power source, one end of the first fixing portion 213 disposed in the movable cavity 13 and one end of the first elastic portion 212 away from the first elastic sheet 211 are fixedly connected, one end of the second fixing portion 223 disposed in the movable cavity 13 and one end of the second elastic portion 222 away from the second elastic sheet 221 are fixedly connected, that is, the first elastic portion 212, the first elastic sheet 211, the piezoelectric element 23, the second elastic sheet 221 and the second elastic portion 222 are all located in the movable cavity 13, and the first fixing portion 213, the first elastic portion 212, the first elastic sheet 211, the piezoelectric element 23, the second elastic sheet 221, the second elastic portion 222 and the second fixing portion 223 can form a loop.

In this configuration, the first elastic portion 212, the first elastic piece 211, the piezoelectric element 23, the second elastic piece 221, and the second elastic portion 222 can communicate with an external ac power source through the first fixing portion 213 and the second fixing portion 223; in addition, the first elastic portion 212 and the second elastic portion 222 can be fixed.

Optionally, the fixing structure 1 comprises a housing 15 and a cover 16, and the cover 16 is detachably disposed on the housing 15 and encloses with the housing 15 to form the movable chamber 13.

Specifically, the first fixing portion 213 and the second fixing portion 223 penetrate through the housing 15, 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 portion 222 are all located in the movable cavity 13, and the first elastic portion 212, the first elastic piece 211, the piezoelectric element 23, the second elastic piece 221, and the second elastic portion 222 can swing around the X axis in the movable cavity 13.

Optionally, referring to fig. 4, the cover 16 is provided with a transparent layer 17 on its surface.

Wherein the transparent layer 17 is provided as transparent glass, transparent plastic, transparent PVC plate, or the like.

With such an arrangement, light can irradiate the first reflector 3 through the transparent layer 17, and the light is reflected by the first reflector 3 and emitted through the transparent layer 17, so that the movable cavity 13 formed by enclosing the housing 15 and the cover 16 can be prevented from being communicated with an external space through the transparent layer 17, which is beneficial to further prolonging the service life of the piezoelectric element 23.

In an embodiment of the present application, referring to fig. 1 and fig. 2, the vibration element 2 includes more than three elastic electrodes spaced apart along the Z axis, a piezoelectric element 23 is connected between any two adjacent elastic electrodes, and the two adjacent elastic electrodes are a first elastic electrode 21 and a second elastic electrode 22, respectively.

Specifically, the vibration component 2 includes more than three elastic electrodes distributed at intervals along the Z axis, that is, the piezoelectric elements 23 are arranged in two or more, when the piezoelectric elements 23 are arranged in two or more, for example, when the piezoelectric elements 23 are arranged in two, the first elastic electrode 21 is arranged between the two piezoelectric elements 23, and the sides of the two piezoelectric elements 23 facing away from the first elastic electrode 21 are both provided with the second elastic electrodes 22; by adjusting the number of the piezoelectric elements 23 and the number of the elastic electrodes, the thicknesses of the piezoelectric elements 23 with different numbers are different, when the angle of the piezoelectric element 23 in the fixing structure 1 needs to be adjusted, the piezoelectric elements 23 are stacked between the first limiting portion 11 and the second limiting portion 12, and by adjusting the number of the piezoelectric elements 23, the thicknesses of the piezoelectric elements 23 are changed, for example, when two piezoelectric elements 23 are arranged, two piezoelectric elements 23 are limited between the first limiting portion 11 and the second limiting portion 12, and at this time, the two piezoelectric elements 23 are in a horizontal state; when the piezoelectric elements 23 are three, the thicknesses of the three piezoelectric elements 23 are greater than the thicknesses of the three piezoelectric elements 23, and the three piezoelectric elements 23 are located between the first locating portion 11 and the second locating portion 12.

So set up, through setting up different quantity's piezoelectric element 23 and elastic electrode, can adjust the gross thickness that a plurality of piezoelectric element 23 were established in the pile, can further adjust the angle of piezoelectric element 23 in fixed knot constructs 1, can further increase the diffusion scope of light, improved the convenience of using.

The present application further provides a projection apparatus, as shown in fig. 6, including a reflection device and a projector body 4, where the reflection device is disposed on the projector body 4, and the projection apparatus includes a projection plane 5, and the projection plane 5 is used to receive an optical signal emitted from the reflection device and perform projection.

Specifically, in this embodiment, the optical signal is set as a projection light, the projection light emitted from the projector body 4 irradiates the reflection device, the projection light is reflected by the reflection device, the projector light irradiates the projection plane 5 by diffusion, the diffused light can be projected onto the projection plane 5, and a projection picture is projected on the projection plane 5; in addition, different projection pictures can be formed by controlling the on-off action of the projection light, for example, when the on-off action of the projection light is set to be 'on, off, on' \ 8230 '\ 8230'; when the on-off action of the projection light is set to be 'on, off, on, off' \ 8230 '\ 8230'; when the on-off action of the projection light is set to be normally on, a projection surface can be formed; when the on-off action of the projection light is set to be' on, off, on \8230and \8230, a projection picture converted from projection points to projection lines and from the projection lines to a projection surface can be formed.

Compared with the prior art, the projection equipment provided by the embodiment of the application has the advantages that the projection light of the projector body 4 is diffused through the reflection device, so that the projection light is fully diffused, and a projection picture is prevented from generating dazzling patches; in addition, different kinds 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 the reflection devices is set to be multiple, the multiple reflection devices are distributed at intervals, a second reflection element 6 is disposed between any two adjacent reflection devices, and the second reflection element 6 is configured to reflect the light emitted from the first reflection element 3 of one of the reflection devices to the first reflection element 3 of the other reflection device;

or, any adjacent three reflecting devices are arranged at intervals, and any one of the three reflecting devices is located between the light emitting sides of the other two reflecting devices, wherein any one of the three reflecting devices is configured to reflect the optical signal emitted by the first reflecting element 3 of one of the other two reflecting devices to the first reflecting element 3 of the other reflecting device.

Specifically, when the second reflection member 6 is disposed between any two adjacent reflection devices, any one of the two adjacent reflection devices can diffuse the optical signal for the first time and emit the optical signal after the first diffusion to the second reflection member 6, and the second reflection member 6 can reflect the optical signal after the first diffusion to another reflection device, in the process, the transmission distance of the optical signal is increased, so that the diffusion angle of the optical signal is increased, and when the optical signal reflected by the second reflection member 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 another reflection device is arranged between any two adjacent reflection devices, namely any one of the two reflection devices is positioned between the light-emitting sides of the other two reflection devices, in this way, the first reflection piece 3 of one of the reflection devices, the light-emitting sides of any two of the two adjacent reflection devices are kept consistent, namely the light-emitting side direction of the last one is different from any two of the two, the light-emitting sides of any two of the reflection devices, the light signals of which are kept consistent, can be subjected to first diffusion, and can be emitted to the reflection device, the light signals of which are different from any two of the two light-emitting sides, and the reflection device can be used for carrying out second diffusion on the light signals, and can be emitted to the first reflection piece 3 of the other reflection device, the light-emitting sides of which are kept consistent, and is subjected to third diffusion.

So set up, through a plurality of reflect meter and second reflection part 6, can carry out diffusion many times to light, at the practical application in-process, can adjust the diffusion angle of light according to actual demand, help improving the convenience of using.

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

It should be noted that, in the present embodiment, the number of the reflection devices is set to two for explanation; of course, in other embodiments, the reflecting devices can be arranged in other numbers according to the actual use requirement.

Specifically, in this embodiment, the number of the reflection devices is two, the projection light of the projector body 4 first irradiates to one of the reflection devices, the projection light is reflected by one of the reflection devices, and can be diffused for the first time, the projection light diffused for the first time irradiates to the second reflection member 6, the second reflection member 6 reflects the projection light diffused for the first time to the other reflection device, the projection light diffused for the first time can increase the angle of the projection light by passing through the second reflection member 6, and the other reflection device can diffuse the projection laser light for the second time; for example, referring to fig. 6, the projection light is S, when one of the first reflectors 3 swings between the first position and the second position, and when the first reflector 3 is at the first position, the projection light S is reflected by the first reflector 3 to form a projection light S1; when the first reflector 3 is at the second position, the projection light S is reflected by the first reflector 3 to form a projection light S2, wherein an included angle between the projection light S1 and the projection light S2 is alpha 1; when the other first reflector 3 swings between the first position and the second position, when the other reflector is at the first position, the projection light S1 is reflected by the first reflector 3 to form a projection light S11, and when the other first reflector 3 is at the second position, the projection light S2 is reflected by the first reflector 3 to form a projection light S21, wherein an included angle between the projection light S11 and the projection light S21 is β 1, as can be seen from the figure, α 1 is smaller than β 1, and the projection light S, the projection light S1, the projection light S2, the projection light S11, and the projection light S21 are all located in the same plane.

With the arrangement, the projection light is diffused for multiple times through the plurality of reflecting devices, so that the diffusion angle of the projection laser is increased, namely the diffusion area is increased, and the diffusion angle of the projection laser is in direct proportion to the diffusion times of the projection laser; in addition, the swing axes of the piezoelectric elements 23 of two adjacent reflection devices are parallel, and the diffusion directions of the projection light rays are all located in the same plane, so that the projection light rays can be diffused in one direction, and convenience in use is improved.

In another embodiment of the present application, referring to fig. 8, the light received by the projection plane 5 forms an angle smaller than 90 ° with the projection plane 5.

It should be noted that, in the present embodiment, the example is described in which the included angle γ between the projection plane 5 and the received light is set to 9 ° and 18 °; certainly, in other embodiments, the angle of γ may also be set to 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 10 °, 11 °, 12 °, 13 °, 14 °, 15 °, 16 °, 17 °, 18 °, 19 °, 8230, 87 °, 88 °, or 89 °, which is not limited herein.

Specifically, in this embodiment, it is described by taking the example that the number of the reflection devices is set to one, and in other embodiments, according to the actual application requirement, the number of the reflection devices may also be set to other numbers; the first reflecting member 3 of the reflecting device can swing between a first position and a second position, for example, when the first reflecting member 3 is at the first position, the projection light M forms projection light M1 through the reflection of the first reflecting member 3; when the first reflecting member 3 is at the second position, the projection light M is reflected by the first reflecting member 3 to form a projection light M2, the included angle between the projection light M1 and the projection plane 5 is 9 °, and the included angle between the projection light M2 and the projection plane 5 is 18 °.

With the arrangement, compared with the prior art that the included angle between the light rays emitted by the projection plane 5 and the reflection device is larger than 90 degrees, when the included angle between the light rays emitted by the projection plane 5 and the reflection device is smaller than 90 degrees, the area of the projection laser irradiated onto the projection plane 5 after diffusion can be increased.

Example two

This embodiment is substantially the same as the first embodiment, and the differences are only that: as shown in fig. 2, the surfaces of the piezoelectric element 23, the first elastic electrode 21, and the second elastic electrode 22 are each provided with the first reflecting member 3.

Specifically, the surfaces of the piezoelectric element 23, the first elastic electrode 21 and the second elastic electrode 22 are all provided with the first reflection element 3, and the piezoelectric element 23 can drive the first elastic electrode 21 and the second elastic electrode 22 to swing around the X axis simultaneously when swinging around the X axis, so that the reflection device can reflect a plurality of beams of light simultaneously.

So set up, a plurality of first reflection parts 3 can be along with piezoelectric element 23, first elastic electrode 21 and the activity of second elastic electrode 22 to the reflection direction and the angle of adjustment first reflection part 3 can reflect simultaneously to multibeam light according to the practical application demand, and like this, can spread multibeam light simultaneously, have improved reflect meter's utilization ratio, help improving the convenience of using.

EXAMPLE III

This embodiment is substantially the same as the first embodiment, and the differences are only: as shown in fig. 2, the first elastic portion 212 and the second elastic portion 222 are respectively provided outside the opposite sides of the piezoelectric element 23 along the Z axis.

In this embodiment, the first elastic portion 212 and the second elastic portion 222 are springs, and the first elastic portion 212 and the second elastic portion 222 extend substantially along the Z axis and are configured to provide an elastic force substantially parallel to the Z axis; in other embodiments, the first elastic portion 212 and the second elastic portion 222 may also be configured as a tension spring, a spring plate, or the like according to practical application requirements.

Specifically, the first elastic portion 212 and the second elastic portion 222 are respectively disposed outside two opposite sides of the piezoelectric element 23 along the Z axis, wherein the first elastic portion 212 abuts between the first elastic sheet 211 and the fixing structure 1, and the second elastic portion 222 abuts between the second elastic sheet 221 and the fixing structure 1; when the piezoelectric element 23 expands, the piezoelectric element 23 swings clockwise around the X axis, and the distance between the two sides of the piezoelectric element 23 and the fixed structure 1 is shortened, and at this time, the first elastic part 212 and the second elastic part 222 are both in a compressed state, and simultaneously, elastic force is stored; when the piezoelectric element 23 contracts, the piezoelectric element 23 swings counterclockwise about the X axis, and the distance between both sides of the piezoelectric element 23 and the fixed structure 1 increases, and at this time, the first elastic portion 212 and the second elastic portion 222 are in an extended state, and the accumulated elastic force can be applied to the piezoelectric element 23.

With this arrangement, when the piezoelectric element 23 expands, the first elastic part 212 and the second elastic part 222 can store the elastic force, and when the piezoelectric element 23 contracts, the stored elastic force is applied to the piezoelectric element 23, so that the piezoelectric element 23 rapidly swings around the X axis, and the swing efficiency of the piezoelectric element 23 can be increased; in addition, the first elastic portion 212 and the second elastic portion 222 enable the piezoelectric element 23 to be always positioned between the first positioning portion 11 and the second positioning portion 12.

Example four

This embodiment is substantially the same as the first embodiment, and the differences are only: as shown in fig. 2, the piezoelectric element 23 is provided with the first reflecting member 3 on both opposite sides along the Z-axis.

Specifically, the piezoelectric element 23 is provided with the first reflecting member 3 on both opposite sides along the Z axis, and the piezoelectric element 23 is configured to protrude out of the opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, and therefore, in the present embodiment, the number of the first reflecting members 3 may be set to two or four; when the number of the first reflectors 3 is two, two first reflectors 3 are respectively arranged on two 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, one of the first reflectors 3 is arranged on the side and extends out of any one of two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis, the other first reflector 3 is arranged on the other side of the piezoelectric element 23 along the Z axis, and the other first reflector 3 is arranged on the side and extends out of any one of two opposite sides of the first elastic electrode 21 and the second elastic electrode 22 along the Y axis; when the number of the first reflective members 3 is four, the four first reflective members 3 are respectively disposed on two opposite sides of the piezoelectric element 23 along the Z-axis, and the first reflective members 3 are disposed on two opposite sides of the two opposite sides along the Z-axis extending out of the first elastic electrode 21 and the second elastic electrode 22 along the Y-axis.

With this arrangement, when the incident light is set to a plurality of beams, the corresponding first reflecting members 3 can be provided on the surface of the piezoelectric element 23 according to the number and incident direction of the incident light, which contributes to improvement of convenience in use.

EXAMPLE five

This embodiment is substantially the same as the first embodiment, and the differences are only: as shown in fig. 9 to 12, the oscillation axes of the piezoelectric elements 23 of the adjacent two reflection devices form a predetermined angle.

In the present embodiment, it is described by taking an example that the swing axes of the piezoelectric elements 23 of two adjacent reflection devices form a preset included angle set to 90 °; of course, in other embodiments, the preset included angle may be set to other angles according to the actual application requirement, for example, the angle of the preset included angle may be set to all angles between 1 ° and 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 one, for example, the projection light N irradiates on the first reflection member 3 of one of the reflection devices, the first reflection member 3 can swing between a first position and a second position, and when the first reflection member 3 is in the first position, the projection light N forms a projection light N1 through reflection by the first reflection member 3; when the light reflecting piece is at the second position, the projection light N forms projection light N2 through the reflection of the first reflecting piece 3; therefore, the projection light ray N1 and the projection light ray N2 are in the same plane; the swing axis of one of the swing axes of the other reflection device 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 irradiated to the other reflection device in a swing manner, the other first reflection member 3 can swing between a first position and a second position, when the other first reflection member 3 is located at the first position, the projection light N1 is reflected to form a projection light N11, the projection light N2 is reflected to form a projection light N21, when the other first reflection member 3 is located at the second position, the projection light N1 is reflected to form a projection light N12, and the projection light N2 is reflected to form a projection light N22, so that the first diffusion direction is different from the second diffusion direction.

So set up, the swing axis of two adjacent reflect meter's piezoelectric element 23, projection light can one of them direction through one of them reflect meter and spread to another direction through another reflect meter to realize projection light and the ascending diffusion in equidirectional, help improving the convenience of using.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A reflective device, comprising:

a fixed structure;

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 °.