Lens holder assembly and projection device

Abstract

The application relates to the field of projection technology, and provides a lens support assembly, which comprises a sliding table assembly and a lens locking device, the lens locking device is used for detachably mounting a lens, the lens locking device is arranged on the sliding table assembly, the lens locking device can slide in a first direction and a second direction relative to the sliding table assembly, and the first direction and the second direction are perpendicular to each other. The lens support assembly and the projection device provided by the application can realize detachable mounting of the lens, the lens can be replaced according to different working conditions, and after the lens is mounted on the lens locking device, the lens can slide in the first direction and the second direction relative to the sliding table assembly, so that the planar position of the lens can be adjusted. In addition, the application further provides a projection device.

Description

Technical Field

[0001] This application relates to the field of projection technology, specifically to a lens bracket assembly and a projection device. Background Technology

[0002] Engineering projectors require a projection lens at the image output port. After installation with the main unit, the lens's optical axis must be aligned with the axis of the DMD's light-emitting surface. However, due to structural errors and issues with the verticality and flatness of the assembled lens, these requirements are often not met. Furthermore, the lens in engineering projectors needs to be replaced under different operating conditions. Currently, projector lenses cannot be replaced and are prone to misalignment between the lens's optical axis and the DMD's light-emitting surface axis, affecting the projector's performance. Utility Model Content

[0003] This application provides a lens bracket assembly and a projection device to at least partially improve the above-mentioned technical problems.

[0004] The embodiments of this application are implemented through the following technical solutions.

[0005] In a first aspect, embodiments of this application provide a lens support assembly, including a slide assembly and a lens locking device. The lens locking device is used for detachably mounting a lens. The lens locking device is disposed on the slide assembly and is capable of sliding relative to the slide assembly in a first direction and a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0006] In some embodiments, the lens locking device includes a fixed flange, multiple sliders, and a cam plate. The fixed flange has a first through hole and multiple sliding grooves arranged radially along and communicating with the first through hole. The multiple sliders are slidably disposed within the multiple sliding grooves, selectively extending into or retracting from the first through hole during sliding. Each slider has a first driving part. The cam plate is attached to the fixed flange and can rotate relative to it. The cam plate has a second through hole and multiple second driving parts, each corresponding to a first driving part, to drive the sliders to slide when the cam plate rotates.

[0007] In some embodiments, the first driving part includes a pin disposed on the slider, the pin being disposed toward the cam plate, and the second driving part includes a track groove disposed on the cam plate, the pin being at least partially embedded in the track groove, the track groove having a first position and a second position, when the pin slides to the first position, the slider exits the first through hole, and when the pin slides to the second position, the slider extends into the first through hole.

[0008] In some implementations, the track groove is configured to be arc-shaped, and the center of the track groove does not coincide with the center of the second through hole.

[0009] In some implementations, when the pin switches from the first position to the second position, the pin is interference-fitted with the track groove.

[0010] In some embodiments, the tangent of the track groove at the second position is perpendicular to the line connecting the second position and the center of the second through hole.

[0011] In some embodiments, a locking structure is also provided between the cam plate and the fixed flange, which is used to restrict the relative rotation of the cam plate and the fixed flange when the pin is in the second position.

[0012] In some embodiments, the locking structure includes a locking hole and an elastic positioning element, one of which is disposed on a cam plate and the other is disposed on a fixed flange. When the pin is in the second position, the elastic positioning element is embedded in the locking hole.

[0013] In some implementations, the slider is configured as a wedge.

[0014] In some embodiments, the lens locking device further includes a pressure plate for pressing the cam plate against the fixed flange.

[0015] In some embodiments, the slide assembly includes a support and a guide rail bracket, a guide wheel bracket, a first driving device, a second driving device, a first guide wheel, and a second guide wheel. The guide rail bracket has a first guide rail arranged along a first direction and a second guide rail arranged along a second direction. The guide wheel bracket is disposed on the support and can slide relative to the support. A lens locking device is mounted on the guide wheel bracket. The first guide wheel is disposed on the guide wheel bracket and slides in cooperation with the first guide rail. The first driving device is used to drive the guide wheel bracket to slide along the first direction. The second guide wheel is disposed on the support and slides in cooperation with the second guide rail. The second driving device is used to drive the guide rail bracket to drive the guide wheel bracket to slide along the second direction.

[0016] In some embodiments, the first guide rail is disposed on the inner side of the guide rail bracket, and the first guide wheel is disposed on the outer side of the second guide rail bracket.

[0017] In some implementations, the first guide rail is a V-shaped guide rail, the first guide wheel is a V-shaped wheel that mates with the first guide rail, the second guide rail is a V-shaped guide rail, and the second guide wheel is a V-shaped wheel that mates with the second guide rail.

[0018] Secondly, embodiments of this application also provide a projection device, including the above-described lens bracket assembly and lens, the lens having a lens flange, and a lens locking device for detachably connecting to the lens flange.

[0019] The lens bracket assembly and projection device provided in this application embodiment can realize the detachable installation of the lens, and the lens can be replaced according to different working conditions. At the same time, after the lens is installed in the lens locking device, it can slide relative to the slide assembly in the first direction and the second direction to realize the planar position adjustment of the lens. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a partial exploded structural diagram of a projection device provided in an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the structure of a lens locking device in a projection device provided in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the lens installation state in a projection device provided in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the lens mounting structure in a projection device provided in an embodiment of this application.

[0025] Figure 5 This is a diagram showing the state of the pin shaft of a projection device in the installation state when the lens is in the present application embodiment.

[0026] Figure 6 This is a schematic diagram of a locking structure in a projection device provided in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of the structure of a slide assembly in a projection device provided in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the slide assembly in a projection device provided in an embodiment of this application from another perspective.

[0029] Figure 9 This is a schematic diagram of the structure of a guide rail bracket in a projection device provided in an embodiment of this application.

[0030] Figure 10 This is a schematic diagram of the structure of the first guide rail in a projection device provided in an embodiment of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Engineering projectors require a projection lens at the image output port. After installation with the main unit, the lens's optical axis must be aligned with the axis of the DMD's light-emitting surface. However, due to structural errors and issues with the verticality and flatness of the assembled lens, these requirements are often not met. Furthermore, the lens in engineering projectors needs to be replaced under different operating conditions. Currently, projector lenses cannot be replaced and are prone to misalignment between the lens's optical axis and the DMD's light-emitting surface axis, affecting the projector's performance.

[0033] Based on this, the inventors of this application propose a lens bracket assembly and a projection device to at least partially improve the above-mentioned technical problems. The present invention will be described in detail below with reference to specific embodiments.

[0034] Please refer to the following: Figure 1 and Figure 2 This embodiment provides a projection device 1, including a lens bracket assembly 10 and a lens 30, wherein the lens bracket assembly 10 is used for detachably mounting the lens 30. Figure 2 (As shown in the image). Lens 30 has a lens flange, on which a flange groove 31 is provided ( Figure 3 As shown in the figure, flange groove 31 is used for assembling and connecting lens bracket assembly 10 and lens 30.

[0035] The lens support assembly 10 includes a slide assembly 20 and a lens locking device 50, wherein the lens locking device 50 is mounted on the slide assembly 20 and is used for detachably mounting the lens 30.

[0036] Specifically, in this embodiment, refer to Figure 2The lens locking device 50 includes a fixed flange 60, multiple sliders 80, and a cam plate 70. The fixed flange 60 has a first through hole 61, which is approximately located in the middle of the fixed flange 60. The fixed flange 60 also has multiple sliding grooves 62, which are arranged radially along the first through hole 61 and communicate with the first through hole 61. The sliding grooves 62 are used to assemble the sliders 80. To improve the stability of the sliders 80 sliding, the multiple sliding grooves 62 can be evenly arranged circumferentially along the first through hole 61, thus ensuring the stability of the entire lens locking device 50 during relative movement. In this embodiment, only as an example, the number of sliding grooves 62 is three. It is understood that in some other embodiments, the number of sliding grooves 62 can be other values, and this embodiment does not limit this.

[0037] When the lens 30 is assembled into the lens support assembly 10, the lens flange can be partially embedded in the first through hole 61. At this time, the flange groove 31 of the lens 30 can be rotated to correspond to the position of the slide groove 62. It can be understood that the number of flange grooves 31 on the lens 30 can also be configured to match the number of slide grooves 62. In this way, when the lens 30 is assembled into the lens support assembly 10, the multiple flange grooves 31 of the lens 30 can be rotated to correspond one-to-one with the positions of the multiple slide grooves 62. Of course, in some other embodiments, the number of flange grooves 31 can also be greater than the number of slide grooves 62.

[0038] The slider 80 is slidably mounted in the groove 62 of the fixed flange 60. In this embodiment, the number of sliders 80 matches the number of grooves 62, with multiple sliders 80 correspondingly slidably disposed in multiple grooves 62. During the sliding process of the slider 80 relative to the groove 62, it can selectively extend into or retract from the first through hole 61. When the slider 80 extends into the first through hole 61, it can be embedded in the flange groove 31 of the lens 30, thereby locking the lens 30 in place. When the slider 80 retracts from the first through hole 61 and is completely retracted into the groove 62, the slider 80 is completely disengaged from the flange groove 31 of the lens 30, and the lens 30 is thus separated from the lens locking device 50.

[0039] To ensure the sliding stability of slider 80 within slide groove 62, the width of slide groove 62 can be slightly wider than the width of slider 80. This ensures that the sliding friction between slider 80 and slide groove 62 is small, while also ensuring that slider 80 has good guiding properties during sliding, making the operation of the entire lens locking device 50 smoother.

[0040] like Figure 3As shown, when the flange of the lens 30 is inserted into the first through hole 61, the slide groove 62 corresponds to the flange groove 31. At this time, when the slider 80 extends into the first through hole 61, the slider 80 can be inserted into the flange groove 31 on the lens 30. At this time, the axial degree of freedom of the lens 30 along the first through hole 61 and the rotational degree of freedom of the lens 30 are both restricted by the slider 80, thereby locking the lens 30. To ensure that the slider 80 not only restricts the freedom of the lens 30 but also completely locks the lens 30, in this embodiment, the slider 80 is configured as a wedge. Specifically, the portion of the slider 80 that can extend into the first through hole 61 and the flange groove 31 is configured as a wedge, meaning that the portion of the slider 80 that can extend into the first through hole 61 and the flange groove 31 has at least one inclined surface 82. With this configuration, when the slider 80 is embedded in the flange groove 31, as the depth of the slider 80 extending into the flange groove 31 gradually increases, the friction between the slider 80 and the flange groove 31 gradually increases, ultimately completely locking the lens 30, resulting in a better locking effect on the lens 30. It is understood that the slider 80 has multiple surfaces, one of which can be configured as a wedge, or multiple surfaces can be configured as wedges; this embodiment does not limit this.

[0041] To facilitate the insertion of the slider 80 into the flange groove 31 during the sliding process, the opening of the flange groove 31 can be configured to have a larger diameter than other parts of the flange groove 31. This way, even if the flange groove 31 and the slide groove 62 are not completely aligned, the slider 80 can still be inserted into the flange groove 31, improving the convenience of user operation.

[0042] The slider 80 is also provided with a first driving unit, which is used to receive external driving force to drive the slider 80 to slide within the slide groove 62. It is understood that the first driving unit can be configured in various forms, and this embodiment does not limit it.

[0043] The cam plate 70 is attached to the fixed flange 60 and can rotate relative to the fixed flange 60. The cam plate 70 is provided with a second through hole 71, which is coaxially arranged with the first through hole 61 of the fixed flange 60. The cam plate 70 is also provided with multiple second driving parts, which are connected to a first driving part in a corresponding manner, so as to drive the slider 80 to slide when the cam plate 70 rotates. In this way, the user only needs to rotate the cam plate 70 to control the sliding of the slider 80, thereby controlling the installation and removal of the lens 30.

[0044] As a more specific implementation method, please refer to the following in this embodiment: Figure 2 and Figure 4The first driving unit includes a pin 81 disposed on the slider 80, with the pin 81 facing the cam plate 70. The second driving unit includes a track groove 72 disposed on the cam plate 70, with the pin 81 at least partially embedded in the track groove 72. When the cam plate 70 rotates, the track groove 72 applies a force to the pin 81, causing the pin 81 to drive the slider 80 to slide. The track groove 72 has a first position and a second position. When the pin 81 slides to the first position, the slider 80 exits the first through hole 61. When the pin 81 slides to the second position, the slider 80 extends into the first through hole 61. It should be noted that in the second position, the slider 80 extends into the first through hole 61 and can be embedded in the flange groove 31. It is understood that the track groove 72 may also include other positions besides the first and second positions.

[0045] During the rotation of the cam plate 70, the groove wall of the track groove 72 applies a force to the pin 81, causing the pin 81 to drive the slider 80 to rotate. The track groove 72 can be, for example, a straight groove, in which case the extension direction of the track groove 72 can be inclined radially relative to the second through hole 71. In this embodiment, the track groove 72 is configured as an arc, and the center of the track groove 72 does not coincide with the center of the second through hole 71. In this way, when the cam plate 70 rotates, the rotation trajectory of the track groove 72 will cause the wall of the track groove 72 to contact the pin 81 for transmission. The advantage of this arrangement is that the drive of the pin 81 by the track groove 72 is smoother, and the sliding speed can be precisely controlled, avoiding damage to the lens 30 caused by the excessively fast sliding speed of the slider 80.

[0046] It is understood that in some other embodiments, the first driving part may be the track groove 72 and the second driving part may be the pin 81. This embodiment does not limit this.

[0047] After the slider 80 is fully embedded in the flange groove 31 of the lens 30, in order to prevent the slider 80 from exiting the flange groove 31 and improve the locking effect of the lens 30, the second position of the pin 81 located in the track groove 72 can be limited to prevent the pin 81 from sliding back to the first position. In a more specific embodiment, the end of the track groove 72 near the second position can be configured to have a narrower groove width. When the pin 81 switches from the first position to the second position, the pin 81 is interference-fitted with the track groove 72 to lock the pin 81. Without external force, the pin 81 cannot slide back to the first position on its own, thus locking the pin 81.

[0048] In another, more specific embodiment, see [link to relevant documentation] Figure 5The tangent S1 of the track groove 72 at the second position is perpendicular to the line S2 connecting the second position and the center of the second through hole 71. With this arrangement, when the pin 81 is in the second position, the frictional force exerted by the track groove 72 on the pin 81 is perpendicular to the line connecting the second position and the center of the second through hole 71. When the external force pushes the slider 80 in the opposite direction, the radial thrust is limited by the track groove 72 and no tangential force is generated. This reverses the rotation of the cam plate 70, causing the slider 80 to displace outward, thus preventing the flange of the lens 30 from loosening.

[0049] It is understood that in other embodiments, the first driving unit and the second driving unit may be configured in other forms, and this embodiment does not limit this.

[0050] To further improve the installation stability of the lens 30, in this embodiment, a locking structure can also be provided between the cam plate 70 and the fixed flange 60. The locking structure is used to restrict the relative rotation of the cam plate 70 and the fixed flange 60 when the pin 81 is in the second position.

[0051] In a more specific embodiment, the locking structure includes a locking hole 73 and an elastic positioning element 65. One of the locking hole 73 and the elastic positioning element 65 is disposed on the cam plate 70, and the other is disposed on the fixed flange 60. When the pin 81 is in the second position, the elastic positioning element 65 is embedded in the locking hole 73. Specifically, in this embodiment, the locking hole 73 is disposed on the cam plate 70, and the elastic positioning element 65 is disposed on the fixed flange 60. Specifically, the elastic positioning element 65 includes a screw and an elastic ball. The screw can be threaded to the fixed flange 60. The top of the screw is provided with a mounting hole, and the elastic ball is disposed in the mounting hole and is elastic. In its natural state, the elastic ball at least partially protrudes from the mounting hole. When subjected to external force, the elastic ball can be pressed into the mounting hole. In use, when the cam plate 70 rotates to the second position where the pin 81 is located in the track groove 72, the locking hole 73 corresponds to the elastic positioning element 65, and the elastic positioning element 65 is embedded in the positioning hole to position the cam plate 70, preventing relative rotation between the cam plate 70 and the fixed flange 60. When it is necessary to remove the lens 30, an external force is applied to the cam plate 70, causing the elastic positioning member 65 to be compressed back into the mounting hole. At this time, the locking structure fails, and the cam plate 70 can rotate relative to the fixed flange 60. During the rotation, the pin 81 switches from the second position back to the second position, and the slider 80 exits the flange groove 31. At this time, the lens 30 can be removed.

[0052] The lens locking device 50 may also include a pressure plate 90, which is used to press the cam plate 70 against the fixed flange 60 to restrict the degree of freedom of the cam plate 70 along the axial direction of the first through hole 61.

[0053] Please refer to the following: Figure 7 and Figure 8The slide assembly 20 includes a support 21, a guide rail bracket 22, a first drive device 26, a second drive device 27, a first guide wheel 24, and a second guide wheel 25. The guide rail bracket 22 is disposed on the support 21, and both the first drive device 26 and the second drive device 27 are disposed on the support 21. The support 21 has a generally plate-like structure, and a through hole is provided on the support 21 for the lens 30 to pass through.

[0054] See Figure 9 The guide rail bracket 22 has a first guide rail 225 arranged along a first direction X and a second guide rail 226 arranged along a second direction Y, wherein the first direction X and the second direction Y are approximately perpendicular to each other. In this embodiment, the first direction X is the X direction and the second direction Y is the Y direction. In this embodiment, the guide rail bracket 22 has a generally frame-shaped structure, and includes a first bracket 221 and a second bracket 222 arranged along the first direction X, and a third bracket 223 and a fourth bracket 224 arranged along the second direction Y. The third bracket 223 and the fourth bracket 224 are connected between the first bracket 221 and the second bracket 222. The first guide rail 225 is disposed on the inner sidewall of the guide rail bracket 22. Specifically, the first guide rail 225 is disposed on the inner sidewall of the first bracket 221 and the second bracket 222, and the first guide rail 225 disposed on the first bracket 221 and the first guide rail 226 disposed on the second bracket 222 are arranged symmetrically to each other. The second guide rail 226 is disposed on the outer side wall of the guide rail bracket 22. Specifically, the second guide rail 226 is disposed on the inner side wall of the third bracket 223 and the fourth bracket 224, and the second guide rail 226 disposed on the third bracket 223 and the second guide rail 226 disposed on the fourth bracket 224 are arranged symmetrically to each other.

[0055] In this embodiment, please refer again. Figure 7 and Figure 8 The slide assembly 20 also includes a guide wheel bracket 23, which is mounted on the support 21 and can slide relative to the support 21. A first guide wheel 24 is mounted on the guide wheel bracket 23 and is located inside the guide rail bracket 22. The lens locking device 50 is mounted on the guide wheel bracket 23. Specifically, in this embodiment, the guide wheel bracket 23 is also provided with three mounting pins 28, which are used to connect with the fixing flange 60 of the lens locking device 50. Specifically, the fixing flange 60 has pin holes 63, which correspond one-to-one with the mounting pins 28. During assembly, the mounting pins 28 pass through the pin holes 63 and are fixed with nuts. To maintain a certain distance between the fixing flange 60 and the guide wheel bracket 23, a spring 29 is sleeved on the mounting pin 28, with both ends of the spring 29 abutting against the guide wheel bracket 23 and the fixing flange 60, respectively.

[0056] The first guide wheel 24 slides in engagement with the first guide rail 225, and the first driving device 26 drives the guide rail bracket 22 to slide along the first direction X. The rotation axis of the first guide wheel 24 is approximately perpendicular to the support 21. In this embodiment, there are four first guide wheels 24, two of which are used to engage with the first guide rail 225 disposed on the first bracket 221, and two of which are used to engage with the first guide rail 225 disposed on the second bracket 222. This arrangement ensures the stability of the relative sliding between the first guide rail 225 and the first guide wheels 24. It is understood that in some other embodiments, the number of first guide wheels 24 may be other values, such as two, six, etc., and this embodiment does not limit this.

[0057] The second guide wheel 25 is disposed on the support 21, and slides in cooperation with the second guide rail 226. It is located on the outer side of the guide rail bracket 22. The second driving device 27 synchronously drives the guide rail bracket 22 and the guide wheel bracket to slide along the second direction Y. The rotation axis of the second guide wheel 25 is approximately perpendicular to the support 21. In this embodiment, there are four second guide wheels 25. Two of them cooperate with the second guide rail 226 disposed on the third bracket 223, and two first guide wheels 24 cooperate with the second guide rail 226 disposed on the fourth bracket 224. This arrangement ensures the stability of the relative sliding between the second guide rail 226 and the second guide wheel 25. It is understood that in other embodiments, the number of second guide wheels 25 can be other values, such as two or six, etc. This embodiment does not limit this.

[0058] The first driving device 26 is used to drive the guide wheel bracket 23 to slide along the first direction X, and the second driving device 27 is used to drive the guide rail bracket 22 to drive the guide wheel bracket 23 to slide along the second direction Y. It is understood that the first driving device 26 and the second driving device 27 can be, for example, a motor, a telescopic cylinder, a linear motor, etc., and this embodiment does not limit them.

[0059] The lens locking device 50 is mounted on the guide rail bracket 22. By setting the first guide wheel 24 and the second guide wheel 25, the entire guide rail bracket 22 can slide along the first direction X or the second direction Y, thereby achieving position adjustment on the plane. The specific adjustment principle is as follows: When it is necessary to control the lens 30 to move along the first direction X, the first drive device 26 is activated, driving the guide wheel bracket 23 to move along the first direction X. At this time, the first guide wheel 24 slides relative to the first guide rail 225. Since the lens locking device 50 is connected to the guide wheel bracket 23, the lens 30 moves along the first direction X together with the guide wheel bracket 23. When it is necessary to control the lens 30 to move along the second direction Y, the second drive device 27 is activated, driving the guide rail bracket 22 to move synchronously along the second direction Y. At this time, the second guide wheel 25 slides in cooperation with the second guide rail 226 on the guide rail bracket 22. When the guide rail bracket 22 moves along the second direction Y, since the first guide wheel 24 is located inside the guide rail bracket 22 and is matched with the first guide rail 225, the guide rail bracket 22 will drive the first guide wheel 24 to drive the guide wheel bracket 23 to move along the second direction Y together. Since the lens locking device 50 is connected to the guide wheel bracket 23, the lens 30 moves along the second direction Y together with the guide wheel bracket 23.

[0060] To reduce the sliding friction between the first guide wheel 24 and the first guide rail 225, and between the second guide wheel 25 and the second guide rail 226, and to improve guiding stability, this embodiment refers to... Figure 10 The first guide rail 225 is a V-shaped guide rail, and the first guide wheel 24 is a V-shaped wheel that mates with the first guide rail 225. The second guide rail 226 is a V-shaped guide rail, and the second guide wheel 25 is a V-shaped wheel that mates with the second guide rail 226. The V-shaped wheel refers to the V-shaped groove formed on the wheel surface of the first guide wheel 24 and the second guide wheel 25. The first guide rail 225 and the second guide rail 226 are provided with boss structures that match the V-shaped grooves. The two interlock, resulting in higher stability of the sliding fit. During sliding, the guide wheel and the guide rail have rolling high-pair contact, resulting in low friction. This allows the guide wheel to withstand eccentric loads while rolling freely and flexibly, improving the driving efficiency of the first drive device 26 and the second drive device 27. Taking the selection of motors for the first drive device 26 and the second drive device 27 as an example, a low-torque motor can be selected to reduce costs and space occupation.

[0061] The lens bracket assembly 10 and projection device provided in this application embodiment can realize the detachable installation of the lens 30, and the lens 30 can be replaced according to different working conditions. At the same time, after the lens 30 is installed in the lens locking device 50, it can slide relative to the slide assembly 20 in the first direction X and the second direction Y to realize the planar position adjustment of the lens 30.

[0062] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A lens support assembly, characterized in that, include: Slide assembly; as well as A lens locking device is provided for detachably mounting a lens. The lens locking device is disposed on the slide assembly and is slidable relative to the slide assembly in a first direction and a second direction, wherein the first direction and the second direction are perpendicular to each other.

2. The lens support assembly according to claim 1, characterized in that, The lens locking device includes: A fixed flange is provided with a first through hole and a plurality of sliding grooves, which are arranged radially along the first through hole and connected to the first through hole. Multiple sliders are slidably disposed in the multiple grooves in a one-to-one correspondence. During the sliding process, the sliders selectively extend into or retract from the first through hole. Each slider is provided with a first driving part. A cam plate is attached to the fixed flange and is rotatable relative to the fixed flange. The cam plate is provided with a second through hole and a plurality of second driving parts. The plurality of second driving parts are connected to a first driving part in a corresponding manner to drive the slider to slide when the cam plate rotates.

3. The lens support assembly according to claim 2, characterized in that, The first driving part includes a pin disposed on the slider, the pin being disposed toward the cam plate. The second driving part includes a track groove disposed on the cam plate, the pin being at least partially embedded in the track groove. The track groove has a first position and a second position. When the pin slides to the first position, the slider exits the first through hole. When the pin slides to the second position, the slider extends into the first through hole.

4. The lens support assembly according to claim 3, characterized in that, The track groove is configured as an arc, and the center of the track groove does not coincide with the center of the second through hole.

5. The lens support assembly according to claim 4, characterized in that, When the pin switches from the first position to the second position, the pin is in an interference fit with the track groove.

6. The lens support assembly according to claim 4, characterized in that, The tangent of the track groove at the second position is perpendicular to the line connecting the second position and the center of the second through hole.

7. The lens support assembly according to claim 3, characterized in that, A locking structure is also provided between the cam plate and the fixed flange. The locking structure is used to restrict the relative rotation of the cam plate and the fixed flange when the pin is in the second position.

8. The lens support assembly according to claim 7, characterized in that, The locking structure includes a locking hole and an elastic positioning element. One of the locking hole and the elastic positioning element is disposed on the cam plate, and the other is disposed on the fixed flange. When the pin is in the second position, the elastic positioning element is embedded in the locking hole.

9. The lens support assembly according to any one of claims 2-8, characterized in that, The slider is configured as a wedge.

10. The lens support assembly according to any one of claims 2-8, characterized in that, The lens locking device also includes a pressure plate, which is used to press the cam plate against the fixed flange.

11. The lens support assembly according to claim 1, characterized in that, The slide assembly includes a support and a guide rail bracket, a guide wheel bracket, a first driving device, a second driving device, a first guide wheel, and a second guide wheel. The guide rail bracket has a first guide rail arranged along a first direction and a second guide rail arranged along a second direction. The guide wheel bracket is disposed on the support and can slide relative to the support. The lens locking device is mounted on the guide wheel bracket. The first guide wheel is disposed on the guide wheel bracket and slides in cooperation with the first guide rail. The first driving device is used to drive the guide wheel bracket to slide along the first direction. The second guide wheel is disposed on the support and slides in cooperation with the second guide rail. The second driving device is used to drive the guide rail bracket to drive the guide wheel bracket to slide along the second direction.

12. The lens support assembly according to claim 11, characterized in that, The first guide rail is disposed on the inner side of the guide rail bracket, and the second guide rail is disposed on the outer side of the guide rail bracket.

13. The lens support assembly according to claim 11 or 12, characterized in that, The first guide rail is a V-shaped guide rail, the first guide wheel is a V-shaped wheel that mates with the first guide rail, the second guide rail is a V-shaped guide rail, and the second guide wheel is a V-shaped wheel that mates with the second guide rail.

14. A projection device, characterized in that, Includes a lens support assembly and a lens as described in any one of claims 1-13, the lens having a lens flange, and the lens locking device for detachably connecting to the lens flange.

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