Projection mechanism and projection device

Abstract

The utility model relates to a projection mechanism and a projection device. The projection mechanism comprises a light source module, a light beam imaging module and a light path turning module. The light source module is used for emitting projection beams; the light beam imaging module and the light source module are arranged at intervals; the light path turning module is located on a light path of the projection light beam, after the projection light beam is turned by the light path turning module, the light path of the projection light beam is turned so that the projection light beam can be conducted to the light beam imaging module, and the projection light beam penetrates through the light beam imaging module and is projected to a target projection plane to form a projection pattern. In the embodiment of the invention, the light path turning module can be matched with the light source module and guide the projection light beam to the light beam imaging module, so that the limiting effect of the light beam imaging module on the position setting of the light source module is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of projection equipment, and in particular to a projection mechanism and a projection device. Background Art

[0002] As people's requirements for projection effects continue to increase, existing projection equipment is integrated with spectral optical elements. The light beam emitted by the light source is spectrally processed by the spectral optical element, and the projection picture formed on the projection surface is arranged in an array or star-shaped arrangement, thereby improving the projection effect.

[0003] However, in the existing projection device, the light source needs to be arranged opposite to the beam splitting optical element so that the light beam can be transmitted to the beam splitting optical element, resulting in that the position of the light source is limited by the beam splitting optical element. Utility Model Content

[0004] The present application provides a projection mechanism and a projection device.

[0005] In the first aspect, the present application provides a projection mechanism, which includes a light source module, an optical path deflection module and an imaging optical element; the light source module is used to emit a projection light beam; the optical path deflection module includes a reflection unit and a beam splitting optical element, both of which are arranged on the optical path of the projection light beam, and the projection light beam forms a primary imaging light after the reflection and beam splitting effects of the optical path deflection module; the imaging optical element is located on the optical path of the primary imaging light, and the primary imaging light passes through the imaging optical element to form a secondary imaging light, and the secondary imaging light is projected onto the target projection surface to form a projection pattern.

[0006] In some optional embodiments, the projection mechanism further includes a driving module, which is transmission-connected to the imaging optical element and is used to drive the imaging optical element to move relative to the optical path folding module.

[0007] In some optional embodiments, the driving module includes a rotating driving member, which is transmission-connected to the imaging optical element, and the imaging optical element rotates around a preset axis under the drive of the rotating driving member.

[0008] Among them, in some optional embodiments, the light path folding module and the imaging optical element are arranged along the extension direction of the preset axis, the imaging optical element and the light source module are arranged in a direction perpendicular to the preset axis, and the light path from the light source module to the light path folding module is perpendicular to the preset axis.

[0009] Among them, in some optional embodiments, an incident surface is provided on the side of the imaging optical element facing the light path deflection module: the imaging optical element has a first orthographic projection pattern on a designated plane, the light source module has a second orthographic projection pattern on the designated plane, the first orthographic projection pattern and the second orthographic projection pattern at least partially overlap, and the designated plane is parallel to the incident surface.

[0010] In some optional embodiments, the reflection unit includes a first reflection element, and the beam splitting optical element is arranged between the light source module and the first reflection element. The projection light beam is transmitted to the first reflection element after the beam splitting action of the beam splitting optical element. The first reflection element reflects the projection light beam to form primary imaging light, and transmits the primary imaging light to the imaging optical element.

[0011] Among them, in some optional embodiments, the reflection unit includes a first reflection element, and the beam splitting optical element is arranged between the imaging optical element and the first reflection element. After the projection light beam is reflected by the first reflection element, the optical path of the projection light beam turns and is transmitted to the beam splitting optical element. The projection light beam passes through the beam splitting optical element to form a primary imaging light. The primary imaging light can be transmitted to the imaging optical element and pass through the imaging optical element to form a secondary imaging light.

[0012] Among them, in some optional embodiments, the reflection unit includes a first reflection member and a second reflection member, and the first reflection member, the beam splitting optical element and the second reflection member are arranged in sequence and at intervals on the path of the projection light beam; or, the optical path deflection module includes a first reflection member and a second reflection member, and the first reflection member, the second reflection member and the beam splitting optical element are arranged in sequence and at intervals on the optical path of the projection light beam.

[0013] Among them, in some optional embodiments, the imaging optical element includes at least one of a polygonal prism, a polygonal mirror and a diffractive optical element; or / and the beam splitting optical element includes at least one of a polygonal prism, a polygonal mirror and a diffractive optical element; or / and the light source module includes at least one of a laser emitter, an LED lamp and a tungsten filament lamp.

[0014] In some optional embodiments, the size of the imaging optical element is larger than the size of the beam splitting optical element.

[0015] In a second aspect, the present application provides a projection device, which includes a shell and the projection mechanism mentioned above, wherein the shell has a containing space; the projection mechanism is arranged in the containing space, and the projection light beam is guided out of the containing space after being subjected to spectral processing by an imaging optical element.

[0016] The present application provides a projection mechanism, which includes a light source module, an optical path folding module and an imaging optical element. The light source module can emit a projection light beam, the optical path folding module and the imaging optical element are sequentially arranged on the optical path of the projection light beam, and the optical path folding module also includes a reflection unit and a beam splitting optical element to fold and split the projection light beam. The optical path folding module can fold the optical path of the projection light beam and perform a first beam splitting action on the projection light beam to form a primary imaging light, and the optical path folding module can cooperate with the light source module to transmit the primary imaging light to the imaging optical element. Therefore, in this embodiment, the setting of the optical path folding module makes it unnecessary for the light source module to face the imaging optical element, that is, the projection light beam emitted by the light source module does not need to be directly transmitted to the imaging optical element along a straight line, the optical path folding module can cooperate with the light source module and guide the projection light beam to the imaging optical element, reduce the limiting effect of the imaging optical element on the position setting of the light source module, and the optical path folding module folds the optical path of the projection light beam, which can make full use of the space, make the layout compact, and make the volume of the projection mechanism relatively small. In actual application scenarios, the position of the light source module can be set according to the specific structure of other components (such as a housing, an imaging optical element, etc.) to improve the applicability of the projection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the projection device provided in an embodiment of the present application.

[0019] Figure 2 yes Figure 1 The structure diagram of the projection mechanism of the first embodiment is shown.

[0020] Figure 3 yes Figure 1 The structure diagram of the second embodiment of the projection mechanism is shown.

[0021] Figure 4 yes Figure 1 The structure diagram of the projection mechanism of the third embodiment is shown.

[0022] Figure 5 yes Figure 1 The structure diagram of the fourth embodiment of the projection mechanism shown in FIG.

[0023] Figure numbers: 1000, projection device, 200, shell, 210, accommodating space, 100, projection mechanism, 10, light source module, 11, second orthographic projection pattern, 20, light path deflection module, 21, reflection unit, 211, first reflection element, 212, second reflection element, 22, beam splitting optical element, 30, imaging optical element, 31, incident surface, 32, first orthographic projection pattern, 40, driving module, 41, rotating shaft. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0025] See also Figure 1 The embodiment of the present application provides a projection device 1000 and a projection mechanism 100. The projection device 1000 may include a housing 200 and the projection mechanism 100. The structure of the housing 200 defines a housing space 210 for housing the projection mechanism 100 and other components of the projection device 1000. In the present embodiment, the projection mechanism 100 is disposed in the housing space 210 to be protected by the housing 200. The projection mechanism 100 can emit a projection beam and split the projection beam to form multiple beams. The multiple beams can be transmitted to the outside of the housing 200 and projected onto a target projection surface (such as an indoor ceiling, a projection screen, etc.). The multiple light spots formed by the multiple beams on the target projection surface can be arranged in an array, a starry sky, or a falling snowflake arrangement to form a projection pattern, which greatly enriches the projection effect of the projection device 1000.

[0026] See also Figure 1 and Figure 2The projection mechanism 100 in this embodiment may include a light source module 10 and an imaging optical element 30, and the light source module 10 and the imaging optical element 30 are arranged at intervals. The light source module 10 is used to emit a projection light beam, and the projection light beam propagates in the accommodating space 210 and can be transmitted to the imaging optical element 30. The imaging optical element 30 can have a diffraction effect on the projection light beam, for example, the projection light beam passes through the diffraction plate to form a diffraction spot, and the imaging optical element 30 can also have a beam splitting effect on the projection light beam, for example, the projection light beam can be divided into multiple beams after passing through a diffraction prism or a multi-faceted mirror, and the imaging optical element 30 can also cooperate with the projection light beam to directly form a projection pattern, for example, the projection light beam can form a projection pattern on the target projection surface through a film with a pattern. In this embodiment, the imaging optical element 30 can have a diffraction effect or a beam splitting effect on the projection light beam, and the projection light beam can form multiple light beams after passing through the imaging optical element 30. After being transmitted out of the housing 200, the multiple light beams can be irradiated to the target projection surface and form a starry sky, array or snowflake falling display effect.

[0027] See also Figure 1 and Figure 2 The projection mechanism 100 in this embodiment may further include an optical path folding module 20, which is spaced apart from the light source module 10 and the imaging optical element 30, respectively. The optical path folding module 20 is arranged corresponding to the light source module 10 so that the optical path folding module 20 can receive the projection light beam emitted by the light source module 10. The optical path folding module 20 in this embodiment includes a reflection unit 21 and a beam splitting optical element 22, and both the reflection unit 21 and the beam splitting optical element 22 are located on the optical path of the projection light beam. The reflection unit 21 and the beam splitting optical element 22 have a reflection effect and a beam splitting effect on the projection light beam, respectively. The projection light beam forms a primary imaging light after the reflection effect and the beam splitting effect of the optical path folding module 20. The imaging optical element 30 in this embodiment has an incident surface 31, and the incident surface is arranged toward the optical path folding module 20, so that the incident surface 31 and the imaging optical element 30 are located on the optical path of the primary imaging light, and the primary imaging light forms a secondary imaging light under the diffraction or beam splitting effect of the imaging optical element 30, and the secondary imaging light is projected onto the target projection surface and forms a projection pattern. It should be understood that the secondary imaging light is formed by the projection light beam after at least two beam splitting effects, so the projection pattern formed by the secondary imaging light beam has a more prominent starry sky, array or snowflake falling display effect.

[0028] In summary, the projection mechanism 100 in this embodiment is provided with an optical path folding module 20, which can fold the optical path of the projection light beam and perform a first beam splitting effect on the projection light beam to form a primary imaging light, and the optical path folding module 20 can cooperate with the light source module 10 to transmit the primary imaging light to the imaging optical element 30. Therefore, in this embodiment, the setting of the optical path folding module 20 makes it unnecessary for the light source module 10 to face the imaging optical element 30, that is, the projection light beam emitted by the light source module 10 does not need to be directly transmitted to the imaging optical element 30 along a straight line, and the optical path folding module 20 can cooperate with the light source module 10 and guide the projection light beam to the imaging optical element 30, thereby reducing the restrictive effect of the imaging optical element 30 on the position setting of the light source module 10, and the optical path folding module 20 folds the optical path of the projection light beam, which can make full use of the space, make the layout compact, and make the volume of the projection mechanism 100 relatively small. In actual application scenarios, the position of the light source module 10 can be set according to the specific structures of other components (such as the housing 200 , the imaging optical element 30 , etc.) to improve the applicability of the projection mechanism 100 .

[0029] See also Figure 1 and Figure 2 In this embodiment, the beam splitting optical element 22 is located between the imaging optical element 30 and the reflecting unit 21. The reflecting unit 21 is arranged at a relative interval with the light source module 10 and is located on the optical path of the projection beam. The reflecting unit 21 can receive the projection beam emitted by the light source module 10 and change the transmission direction of the projection beam so that the projection beam can be transmitted to the beam splitting optical element 22 and the imaging optical element 30 in sequence. Under the setting of this embodiment, the projection beam forms a primary imaging light after the beam splitting effect of the beam splitting optical element 22, and the primary imaging light includes multiple beams; then the primary imaging light is transmitted to the imaging optical element 30, and each beam of the primary imaging light can form multiple beams after the diffraction effect or beam splitting effect of the imaging optical element 30, and the multiple beams formed by the primary imaging light through the imaging optical element 30 form the secondary imaging light mentioned above.

[0030] In some other embodiments, the reflection unit 21 is located between the imaging optical element 30 and the beam splitting optical element 22. The beam splitting optical element 22 is arranged relative to the light source module 10 and is located on the optical path of the projection beam. The beam splitting optical element 22 can receive the projection beam emitted by the light source module 10 and split the projection beam into multiple beams. The multiple beams formed by the beam splitting optical element 22 can be transmitted to the reflection unit 21. The reflection unit 21 can change the transmission direction of the multiple beams. The multiple beams form primary imaging light under the reflection of the reflection unit 21. The primary imaging light can be transmitted toward the imaging optical element 30. Each beam of the primary imaging light can form multiple beams after the diffraction or beam splitting of the imaging optical element 30. The multiple beams formed by the primary imaging light through the imaging optical element 30 form the secondary imaging light mentioned above.

[0031] In this embodiment, the projection mechanism 100 includes an imaging optical element 30. In some other embodiments, the projection mechanism 100 may include two or more imaging optical elements 30. The multiple imaging optical elements 30 are arranged at intervals from each other. The primary imaging light formed by the optical path folding module 20 can be transmitted to each imaging optical element 30 in turn to further improve the projection effect of the projection device 1000.

[0032] This embodiment does not limit the types of the imaging optical element 30 and the beam splitting optical element 22. For example, the imaging optical element 30 may include a diffractive optical element, a multifaceted prism, and a multifaceted mirror, and the beam splitting optical element 22 may include a diffractive optical element, a multifaceted prism, and a multifaceted mirror. This embodiment does not limit the type of the light source module 10 either. For example, it may be a laser emitter, an LED lamp, and a tungsten filament lamp. In actual application scenarios, when the imaging optical element 30 is a diffractive optical element, the light source module 10 uses a laser emitter.

[0033] Regarding the relative positional relationship among the light source module 10 , the reflection unit 21 , the beam splitting optical element 22 and the imaging optical element 30 in this embodiment, the present application provides four embodiments, which will be described in turn below.

[0034] See also Figure 2In the first embodiment, the reflection unit 21, the beam splitting optical element 22 and the imaging optical element 30 are arranged in sequence along the specified direction H, the light source module 10 and the reflection unit 21 are arranged in parallel and spaced in a direction perpendicular to the specified direction H, and the projection light beam emitted by the light source module 10 can be directly transmitted to the reflection unit 21. In the first embodiment, the optical path of the projection light beam from the light source module 10 to the reflection unit 21 is perpendicular to the specified direction H. In the first embodiment, the size of the imaging optical element 30 is substantially the same as the size of the beam splitting optical element 22. In other embodiments, the size of the imaging optical element 30 can be larger than the size of the beam splitting optical element 22, so that the imaging optical element 30 can receive as many beams of the primary imaging light as possible.

[0035] See also Figure 3 and Figure 4 For the convenience of description, the present embodiment is provided with a designated plane A, which is a projection plane parallel to the incident surface 31. The following second and third embodiments will describe the features of the orthographic projection pattern of the projection mechanism 100 on the designated plane A to illustrate the positional relationship between the modules of the projection mechanism 100.

[0036] See also Figure 3 In the second embodiment, the projection mechanism 100 further includes a driving module 40, which is connected to the imaging optical element 30 by transmission. The driving module 40 in the second embodiment is a rotating driving member (such as a servo motor, a stepping motor, etc.), and the imaging optical element 30 can rotate around a preset axis L under the drive of the driving module 40. In this embodiment, the preset axis L is substantially parallel to the straight line where the specified direction H in the foregoing text is located. In some embodiments, the driving module 40 can also be a linear driving member (such as a linear motor, a cylinder, etc.). The driving module 40 in other embodiments can refer to the setting of the driving module 40 in the second embodiment, which will not be described in detail below.

[0037] See also Figure 3 In the second embodiment, the optical path folding module 20, the light source module 10 and the driving module 40 are arranged on the side of the imaging optical element 30 provided with the incident surface 31, and the driving module 40 is transmission-connected with the side of the imaging optical element 30 provided with the incident surface 31. In this embodiment, the optical path folding module 20 and the imaging optical element 30 are arranged along the extension direction of the preset axis L, that is, the reflection unit 21, the beam splitting optical element 22 and the imaging optical element 30 are arranged in sequence approximately along the extension direction of the preset axis L. In the second embodiment, the driving module 40, the optical path folding module 20 and the light source module 10 are arranged in sequence approximately along a straight line, and the straight line defined by the driving module 40, the optical path folding module 20 and the light source module 10 is approximately perpendicular to the preset axis L.

[0038] The projection mechanism 100 is orthographically projected onto a designated plane A and forms an orthographic projection pattern. In the second embodiment, the preset axis L is approximately perpendicular to the designated plane A, that is, the orthographic projection light beam forming the orthographic projection pattern is approximately parallel to the preset axis L. Specifically, the imaging optical element 30 has a first orthographic projection pattern 32 on the designated plane A, and the light source module 10 has a second orthographic projection pattern 11 on the designated plane A, and the first orthographic projection pattern 32 and the second orthographic projection pattern 11 do not overlap. The orthographic projection pattern of the optical path folding module 20 and the orthographic projection pattern of the driving module 40 have a high degree of overlap with the first orthographic projection pattern 32. Therefore, in the second embodiment, in the extension direction of the preset axis L, the optical path folding module 20 and the driving module 40 are respectively approximately opposite to the imaging optical element 30. Taking the plane perpendicular to the preset axis L as the reference system, the outer contour of the projection mechanism 100 is reduced. In the extension direction of the preset axis L, the light source module 10 and the imaging optical element 30 are almost not directly opposite, and the light source module 10 and the combination of the light path deflection module 20, the driving module 40 and the imaging optical element 30 are arranged parallel and spaced approximately in a direction perpendicular to the preset axis L, so that the projection mechanism 100 is flattened. Under the arrangement of the second embodiment, each module of the projection mechanism 100 is relatively compact, which can reduce the size and occupied space of the projection mechanism.

[0039] See also Figure 3 In the second embodiment, the size of the imaging optical element 30 is larger than that of the beam splitting optical element 22. When the imaging optical element 30 rotates relative to the beam splitting optical element 22, the beam splitting optical element 22 can maintain a relative spacing with the imaging optical element 30, so that multiple light beams in the primary imaging light passing through the beam splitting optical element 22 can be transmitted to the imaging optical element 30 as much as possible. After the primary imaging light passes through the imaging optical element 30 in a rotating state, it can form a secondary imaging light and form a dynamic starry sky projection effect on the target projection surface, which greatly enhances the display effect of the projection picture.

[0040] See also Figure 4 In the third embodiment, the projection mechanism 100 further includes a driving module 40, the driving module 40 includes a rotating shaft 41 and a driving member 42 which are connected in a transmission manner, the rotating shaft 41 is connected in a transmission manner to the imaging optical element 30, and the imaging optical element 30 can rotate around a preset axis L, i.e., the axis of the rotating shaft 41, under the drive of the driving module 40. In the third embodiment, the imaging optical element 30 and the driving member 42 are arranged parallel and spaced approximately along the extending direction of the preset axis L, the optical path folding module 20 and the light source module 10 are arranged in a direction perpendicular to the preset axis L, and both the optical path folding module 20 and the light source module 10 are located between the imaging optical element 30 and the driving member 42.

[0041] The projection mechanism 100 is orthogonally projected onto the designated plane A and forms an orthogonal projection pattern. In the third embodiment, the preset axis L is substantially perpendicular to the designated plane A, that is, the orthogonal projection light beam forming the orthogonal projection pattern is substantially parallel to the preset axis L. Specifically, the imaging optical element 30 has a first orthogonal projection pattern 32 on the designated plane A, and the light source module 10 has a second orthogonal projection pattern 11 on the designated plane A, and the first orthogonal projection pattern 32 and the second orthogonal projection pattern 11 at least partially overlap. The orthogonal projection pattern of the light path folding module 20 and the orthogonal projection pattern of the driving module 40 have a high degree of overlap with the first orthogonal projection pattern 32. Therefore, in the third embodiment, in the extension direction of the preset axis L, the light path folding module 20 and the driving module 40 are respectively substantially opposite to the imaging optical element 30, and at least part of the structure of the light source module 10 is opposite to the imaging optical element 30. Therefore, under the setting of the third embodiment, each module of the projection mechanism 100 is relatively compact, and the external contour of the projection mechanism 100 is reduced, which can reduce the size of the projection mechanism and the occupied space.

[0042] See also Figure 4 In the third embodiment, the size of the imaging optical element 30 is larger than that of the beam splitting optical element 22. When the imaging optical element 30 rotates relative to the beam splitting optical element 22, the beam splitting optical element 22 can remain opposite to the imaging optical element 30, so that the multiple light beams in the primary imaging light passing through the beam splitting optical element 22 can be transmitted to the imaging optical element 30 as much as possible. After the primary imaging light passes through the imaging optical element 30 in the rotating state, it can form a secondary imaging light and form a dynamic starry sky projection effect on the target projection surface, which greatly enhances the display effect of the projection picture. In the third embodiment, part of the structure of the light source module 10 is opposite to the imaging optical element 30, so that the projection mechanism 100 can make full use of the space on the side of the imaging optical element 30 facing the beam splitting optical element 22, can reduce the volume of the projection mechanism 100, and can improve the utilization rate of the accommodating space 210 by the projection mechanism 100.

[0043] See also Figure 5In the fourth embodiment, the projection mechanism 100 further includes a driving module 40, which is transmission-connected to the imaging optical element 30. The imaging optical element 30 can rotate around a preset axis L, i.e., the axis of the rotating shaft 41, under the drive of the driving module 40. In the fourth embodiment, the reflection unit 21 includes a first reflection member 211 and a second reflection member 212, which are arranged at intervals. The projection light beam emitted by the light source module 10 can be sequentially transmitted to the first reflection member 211 and the second reflection member 212. After the projection light beam is reflected by the first reflection member 211 and the second reflection member 212, the optical path of the projection light beam turns and can be sequentially transmitted to the beam splitting optical element 22 and the imaging optical element 30. The reflection member in this embodiment can be a reflector or a prism coated with a reflection layer. In the fourth embodiment with two reflective elements, there are more options for the position setting of the light source module 10 relative to other modules of the projection mechanism 100, thereby improving the ability of the projection mechanism 100 to cope with complex installation spaces, and enabling the projection mechanism 100 to be compatible with other components of the projection device 1000 such as the housing 200.

[0044] In other embodiments (such as the first, second, and third embodiments described above), only one reflector may be provided. In still other embodiments, three or more reflectors may be provided, and the multiple reflectors may be arranged at intervals and combined with the light path deflection of the projection light beam, so that the projection light beam can be sequentially transmitted to each reflector, and can be transmitted to the beam splitting optical element 22 and the imaging optical element 30.

[0045] In the absence of conflict, the structural features of the modules such as the light source module 10, the light path deflection module 20, the imaging optical element 30 and the driving module 40 in each of the first, second, third and fourth embodiments as well as the position setting features between the modules can be combined with other embodiments.

[0046] In other embodiments, the optical path deflection module 20 may further include a refractive unit, which has a refractive effect on the projection light beam, and the projection light beam can change the optical path of the projection light beam after passing through the refractive unit. The position setting and quantity setting of the refractive unit can refer to the setting method of the reflective unit, which will not be repeated here. In this embodiment, the refractive unit can be an optical element such as a prism or a lens. In some embodiments, the optical path deflection module 20 may include a refractive unit and a reflective unit to be able to cope with more spatial structures.

[0047] See also Figure 5In the fourth embodiment, the second reflector 212, the beam splitting optical element 22 and the imaging optical element 30 are arranged roughly along the extension direction of the preset axis L. The combination of the second reflector 212, the beam splitting optical element 22 and the imaging optical element 30 can be defined as an optical path module. The first reflector 211 and the second reflector 212 are arranged in a direction perpendicular to the preset axis L, and the light source module 10 is arranged opposite to the first reflector 211. The projection beam emitted by the light source module 10 can be directly transmitted to the first reflector 211. After the projection beam is reflected by the first reflector 211, the optical path of the projection beam turns and is transmitted to the second reflector 212. After the projection beam is reflected by the second reflector 212, the optical path of the projection beam turns and is transmitted to the beam splitting optical element 22 and the imaging optical element 30. In the fourth embodiment, the optical path of the projection beam between the light source module 10 and the first reflector 211 is arranged perpendicular to the preset axis L. The embodiments of the present application (including embodiments one, two, three, four and other embodiments, etc.) do not limit the extension direction of the optical path of the projection light beam between the light source module 10 and the optical path deflection module 20, and can be specifically arranged according to the actual structure of the projection mechanism 100 and the projection device 1000, and can meet the requirements of transmitting the projection light beam to the imaging optical element 30.

[0048] The present embodiment provides a projection mechanism 100, in which a light path folding module 20 is disposed between the imaging optical element 30 and the light source module 10. The light path folding module 20 can fold the light path of the projection light beam to cooperate with the light source module 10 to transmit the projection light beam to the imaging optical element 30. In the present embodiment, the light source module 10 does not need to be disposed directly opposite the imaging optical element 30, that is, the projection light beam emitted by the light source module 10 does not need to be directly transmitted to the imaging optical element 30 along a straight line. The light path folding module 20 can cooperate with the light source module 10 and guide the projection light beam to the imaging optical element 30, thereby reducing the restrictive effect of the imaging optical element 30 on the position setting of the light source module 10. In actual application scenarios, the position of the light source module 10 can be set according to the specific structure of other components (such as the housing 200, the imaging optical element 30, etc.), thereby improving the applicability of the projection mechanism 100.

[0049] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0050] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0051] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection mechanism, characterized in that: include: A light source module, the light source module is used to emit a projection light beam; An optical path deflection module, the optical path deflection module comprising a reflection unit and a beam splitting optical element, the reflection unit and the beam splitting optical element are both arranged on the optical path of the projection light beam, and the projection light beam forms a primary imaging light after the reflection and beam splitting effects of the optical path deflection module; The imaging optical element is located on the optical path of the primary imaging light. The primary imaging light passes through the imaging optical element to form secondary imaging light. The secondary imaging light is projected onto the target projection surface to form a projection pattern.

2. The projection mechanism according to claim 1, characterized in that: The projection mechanism further comprises a driving module, which is transmission-connected to the imaging optical element and is used to drive the imaging optical element to move relative to the optical path folding module.

3. The projection mechanism according to claim 2, characterized in that: The driving module comprises a rotating driving member, the rotating driving member is drivingly connected to the imaging optical element, and the imaging optical element rotates around a preset axis under the driving of the rotating driving member.

4. The projection mechanism according to claim 3, characterized in that: The light path folding module and the imaging optical element are arranged along the extension direction of a preset axis, the imaging optical element and the light source module are arranged along a direction perpendicular to the preset axis, and the light path from the light source module to the light path folding module is perpendicular to the preset axis.

5. The projection mechanism according to claim 4, characterized in that: The imaging optical element is provided with an incident surface on a side facing the optical path folding module; The imaging optical element has a first orthographic projection pattern on a designated plane, the light source module has a second orthographic projection pattern on the designated plane, the first orthographic projection pattern and the second orthographic projection pattern at least partially overlap, and the designated plane is parallel to the incident plane.

6. The projection mechanism according to any one of claims 1 to 5, characterized in that: The reflection unit includes a first reflection member, and the beam splitting optical element is arranged between the light source module and the first reflection member. The projection light beam is transmitted to the first reflection member after the beam splitting effect of the beam splitting optical element. The first reflection member reflects the projection light beam to form the primary imaging light, and transmits the primary imaging light to the imaging optical element.

7. The projection mechanism according to any one of claims 1 to 5, characterized in that: The reflection unit includes a first reflection component, and the beam splitting optical element is arranged between the imaging optical element and the first reflection component. After the projection light beam is reflected by the first reflection component, the optical path of the projection light beam turns and is transmitted to the beam splitting optical element. The projection light beam passes through the beam splitting optical element to form the primary imaging light. The primary imaging light can be transmitted to the imaging optical element and pass through the imaging optical element to form the secondary imaging light.

8. The projection mechanism according to any one of claims 1 to 5, characterized in that: The reflecting unit comprises a first reflecting member and a second reflecting member, wherein the first reflecting member, the beam splitting optical element and the second reflecting member are sequentially arranged at intervals on the path of the projection light beam; or, The optical path deflection module comprises a first reflector and a second reflector. The first reflector, the second reflector and the beam splitting optical element are sequentially and spaced apart from each other on the optical path of the projection light beam.

9. The projection mechanism according to any one of claims 1 to 5, characterized in that: The imaging optical element comprises at least one of a multi-faceted prism, a multi-faceted mirror and a diffractive optical element; or / and The beam splitting optical element comprises at least one of a multi-faceted prism, a multi-faceted mirror and a diffractive optical element; or / and The light source module includes at least one of a laser emitter, an LED lamp and a tungsten filament lamp.

10. The projection mechanism according to claim 9, characterized in that: The size of the imaging optical element is greater than the size of the beam splitting optical element.

11. A projection device, characterized in that: include: A housing having a housing space; as well as The projection mechanism described in any one of claims 1 to 10 is arranged in the accommodating space, and the projection light beam is guided out of the accommodating space after being subjected to spectral processing by the imaging optical element.

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