Lens assembly and vehicle-mounted projection

Abstract

The utility model belongs to the technical field of projection, and discloses a lens assembly, which realizes at least bidirectional projection by matching at least two lenses and a position-switchable reflection guide element, so as to enlarge the use requirements of users. The utility model also discloses a vehicle-mounted projector with the lens assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of projection, and in particular relates to a lens assembly and a vehicle-mounted projector. Background Art

[0002] With the development of projection technology, users have more demands for projection scenes inside the car. The existing projection scenes inside the car are all front projection mode, that is, the projector is projected onto the screen in the front row. In other words, the projector cannot be projected toward the rear, so the user's demand for projection outside the car cannot be met. Utility Model Content

[0003] In order to solve the above technical problems, the present invention discloses a lens assembly that can realize multi-directional projection and expand the use needs of users. The present invention also discloses a vehicle-mounted projector having the above lens assembly.

[0004] The specific technical solutions of the utility model are as follows:

[0005] A lens assembly includes a projection lens, a reflective guiding element and a driving mechanism. The reflective guiding element is driven by the driving mechanism to switch between at least two positions. The reflective guiding element is in different positions to guide incident light to output light paths in different directions. The projection lens is respectively arranged on each output light path.

[0006] In the prior art, projection equipment with multi-directional projection capabilities is usually a single optical machine and a single lens that rotates with the entire machine. At this time, the problems that need to be faced are that there are many transmission mechanisms, high precision requirements for components, complex assembly, heavy weight of components that need to be carried during rotation, poor rotational stability, and the overall solution is difficult to implement and costly. Therefore, the present application arranges at least two projection lenses to achieve optical path adjustment by changing the position of the reflective guide element to meet the actual usage needs of customers. This structure does not require a complex transmission mechanism, has a small load-bearing capacity, and can ensure rotational stability.

[0007] Preferably, the reflective guiding element is driven to rotate by a driving mechanism to guide the incident light to outgoing light paths in different directions, or the reflective guiding element is driven to move linearly by a driving mechanism to guide the incident light to outgoing light paths in different directions.

[0008] There are multiple ways to adjust the position of the reflective guiding element, which can be adapted to different overall structures of projection lenses.

[0009] Preferably, the driving mechanism includes a motor and a worm gear assembly, and the motor is connected to the reflective guide element through the worm gear assembly to drive the reflective guide element to rotate.

[0010] The structure is simple and easy to implement, and can well meet the requirements of optical path conversion.

[0011] Preferably, at least one of the projection lenses is connected to a shift mechanism, the shift mechanism comprising a base and a mounting portion for connecting the projection lens, the mounting portion sliding in a direction perpendicular to the optical axis of the projection lens to be adjustably connected to the base.

[0012] In this application, in order to expand the application scenarios of the projection lens, a shift mechanism is also set up; the position of the projection lens can be adjusted through the shift mechanism, so that when the path of the projection light beam is relatively determined, the position of the projection image can be adjusted to adapt to the deviation of the projection position and ensure the quality of the projection image.

[0013] Preferably, an elastic member that is capable of stretching and deforming along the sliding adjustment direction is provided between the mounting portion and the seat body, and an adjusting member that is movable along the sliding adjustment direction and abuts against the mounting portion is provided on the seat body.

[0014] The elastic member can maintain the projection stability of the projection lens, prevent the projection lens from shaking and affecting the projection quality, and when adjusting the position of the projection lens, the elastic member has an auxiliary reset capability, which can ensure the sliding movement capability of the projection lens during the adjustment process.

[0015] Preferably, the adjusting member is a screw threaded onto the base.

[0016] The structure is simple, easy to implement and convenient to operate.

[0017] Preferably, it further comprises a detection component, wherein the detection component comprises a detection device and a sensing element;

[0018] The sensing element is connected to the reflective guiding element, and the detecting device detects the movement of the sensing element to detect the position change of the reflective guiding element; or, the detecting device is connected to the reflective guiding element, and the detecting device follows the movement of the reflective guiding element and cooperates with the sensing element at different positions to feedback its position change.

[0019] When adjusting the position of the reflective guiding element, the reflective guiding element may not be displaced to the preset position, thereby making it impossible to emit the projection light beam along the preset direction. In other words, the projection picture cannot fall on the screen as it should. Therefore, it is necessary to fine-tune the position of the reflective guiding element. Therefore, the present application provides a detection component, which can detect the displacement data of the reflective guiding element, and reflect the position information of the reflective guiding element through the displacement data fed back by the detection component, so that the driving mechanism can perform driving adjustments, so that the reflective guiding element can well guide the projection light beam to the preset direction, thereby meeting actual projection requirements.

[0020] Preferably, the sensing element is a magnetic component connected to the reflective guiding element, and the detecting device is a Hall sensor.

[0021] The structure is simple and can well meet the position feedback requirements of the reflective guiding element.

[0022] Preferably, the projection lens includes a first lens and a second lens, and the reflective guide element is arranged between the first lens and the second lens;

[0023] The straight line on which the incident light exits through the first lens coincides with the straight line on which the incident light exits through the second lens.

[0024] This structure can well realize the two-way adjustment of the lens assembly, thereby well meeting the actual use requirements.

[0025] In-vehicle projection, including:

[0026] a lens assembly as described above;

[0027] Wherein, one of the outgoing light paths is in a first direction toward the front of the vehicle, and the other outgoing light path is in a second direction toward the rear of the vehicle;

[0028] Screens are respectively arranged in the first direction and the second direction, so that the projection light beam can illuminate the screens to form a projection picture.

[0029] The lens assembly in this application can be applied to vehicles to achieve two-way projection at the front and rear of the vehicle, thereby expanding the scope of application of vehicle-mounted projection.

[0030] Preferably, the screen in the second direction is coated with a rear projection film so that the projection image is displayed on the back of the screen.

[0031] Since the screen in the second direction is coated with a rear projection film, after the projection light beam is emitted to the front of the screen, the projection picture is displayed on the back of the screen, so that the user can watch the movie outside the car.

[0032] Preferably, the driving mechanism is linked to a tailgate signal of the vehicle, and when the driving mechanism drives the reflector to rotate to guide the projection light beam to the second direction, the tailgate automatically opens.

[0033] Since the driving mechanism is linked to the vehicle's tailgate signal, the user's operating steps are saved, and quick configuration can be achieved, thereby improving adjustment efficiency, and also improving the vehicle's intelligent automation level, which can effectively improve the user experience.

[0034] Preferably, it further includes a rotating mechanism, the fixed end of which is connected to the body of the vehicle, and the free end of which is connected to the projection device to drive the projection device to rotate along the horizontal plane and / or pitch along the vertical plane.

[0035] In the present application, the projection lens can realize side window projection when rotating along the horizontal plane, and realize roof projection when pitching along the vertical plane, thereby further improving the applicable environment of the projection equipment.

[0036] Compared with the existing technology, the present invention solves the disadvantage of the single optical machine and single lens rotating together in the existing technology by adding a projection lens and utilizing the displacement of the reflective guiding element, and has the advantages of simple and compact structure, easy operation and low cost; the present invention has a variety of scene application modes, which can well meet customer needs and improve customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of an embodiment of the present utility model;

[0038] Figure 2 A schematic diagram of another direction of the embodiment of the utility model;

[0039] Figure 3 This is a schematic diagram of the arrangement of the detection components in an embodiment of the present utility model;

[0040] Figure 4 A schematic diagram of a reflective guiding element guiding a projection light beam to a first direction in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of a reflective guiding element guiding a projection light beam to a second direction in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of a driving mechanism in an embodiment of the present utility model;

[0043] Figure 7 This is a schematic diagram of a driving mechanism in an embodiment of the present utility model;

[0044] Figure 8 This is a schematic diagram of a driving mechanism in an embodiment of the present utility model;

[0045] Figure 9 This is a schematic diagram of a driving mechanism in an embodiment of the present utility model;

[0046] Figure 10 This is a schematic diagram of a driving mechanism in an embodiment of the present utility model;

[0047] Figure 11 This is a schematic diagram of the shift mechanism in an embodiment of the present utility model;

[0048] Figure 12 This is a schematic diagram of the shift mechanism in an embodiment of the present utility model;

[0049] Figure 13 This is a schematic diagram of the shift mechanism in an embodiment of the present utility model;

[0050] Figure 14 Schematic diagram of the rotating mechanism in the embodiment of the present utility model.

[0051] In the figure: 1-reflection guide element; 2-motor 1; 3-worm gear assembly; 4-base; 5-rotating shaft; 6-lens 1; 7-lens 2; 8-coupling; 9-telescopic cylinder; 10-rack; 11-gear; 12-base; 13-mounting part; 14-elastic member; 15-screw; 16-guide hole; 17-guide rod; 18-linear displacement module; 19-screw and screw block component; 20-gear rack component; 21-detection device; 22-sensing element; 23-motor 2; 24-motor 3. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0053] like Figures 1 to 5 As shown, a lens assembly includes a projection lens, a reflective guiding element 1 and a driving mechanism. The reflective guiding element 1 is driven by the driving mechanism to switch between at least two positions. The reflective guiding element 1 is in different positions to guide the incident light to outgoing light paths in different directions. The projection lens is respectively arranged on each outgoing light path.

[0054] The reflective and guiding element 1 in this embodiment can be selected from a plane reflective mirror, a reflective prism, a curved reflective mirror, a beam splitter, a polygonal reflective mirror, etc., depending on the actual situation. Therefore, because the reflective and guiding element 1 can be switched between at least two positions under the action of a driving mechanism, when the projection light beam emitted by an external optical machine impinges on the reflective and guiding element 1, different output light paths are formed at different positions, thereby achieving multi-directional output direction adjustment to meet actual usage requirements.

[0055] Based on this, in some technical solutions of this embodiment, the reflective guide element 1 is driven to rotate by a driving mechanism to guide the incident light to outgoing light paths in different directions. Furthermore, the driving mechanism includes a motor 2 and a worm gear assembly 3, and the motor 2 is connected to the reflective guide element 1 through the worm gear assembly 3 to drive the reflective guide element 1 to rotate. Specifically, the reflective guide element 1 is arranged on a base 4, and the reflective guide element 1 is connected to the base 4 through a rotating shaft 5; the worm wheel in the worm gear assembly 3 is connected to the rotating shaft 5 provided on the reflective guide element 1. In addition to meeting the rotation requirements of the reflective guide element 1, this structure can also improve the stability of the position of the reflective guide element 1, that is, the self-locking ability of the worm gear assembly 3 is used to improve the projection stability of the projection image. Figures 1 to 5 As shown, for the convenience of explanation, this embodiment realizes bidirectional projection direction adjustment in the first direction and the second direction, that is, the projection lens includes lens one 6 and lens two 7, the straight line where the first direction is located coincides with the straight line where the second direction is located, and the projection light beam is emitted from the optical machine from top to bottom, so that the projection light beam is emitted to the reflecting and guiding element 1 in a direction perpendicular to the horizontal plane, and then the projection light beam is emitted from lens one 6 or lens two 7 along the first direction or the second direction parallel to the horizontal plane. Therefore, in this embodiment, the rotation angle of the reflecting and guiding element 1 switches between 45° and 135°. When the reflecting and guiding element 1 is at 45° to the horizontal plane, the projection light beam is emitted from the first direction to lens one 6. When the reflecting and guiding element 1 is at 135° to the horizontal plane, the projection light beam is emitted from the second direction to lens two 7. In other words, in a technical solution for realizing bidirectional adjustment, the projection lens includes lens one 6 and lens two 7, and the reflecting and guiding element 1 is arranged between lens one 6 and lens two 7; the straight line where the outgoing light path of the incident light through lens one 6 is located coincides with the straight line where the outgoing light path of the incident light through lens two 7 is located. Of course, there are other technical solutions to achieve the rotation of the reflective guide element 1, such as Figure 6 As shown, the free end of the motor 1 2 and the rotating shaft 5 are connected by a coupling 8. At this time, the driving force given by the motor 1 2 directly acts on the rotating shaft 5, thereby realizing the flipping of the reflective guide element 1. Based on this, the driving mechanism can also replace the motor 1 with a telescopic cylinder 9, as shown in FIG. Figure 7 As shown, the rack 10 is connected to the free end of the telescopic cylinder 9, the gear 11 is connected to the rotating shaft 5, and the rack 10 and the gear 11 are engaged, so that the gear 11 is driven to rotate by the rack 10, thereby realizing the rotation of the reflective guide element 1. Figure 8As shown, the free end of the telescopic cylinder 9 is hinged to the reflective guiding element 1. At this time, the movement of the telescopic cylinder 9 can directly drive the reflective guiding element 1 to rotate. Therefore, through the above structure, the reflective guiding element 1 can be well switched in different positions, thereby meeting the specific usage needs of the user. Obviously, it is known that in the above technical solution, the reflective guiding element 1 is usually configured as a plane reflector, a reflective prism, a beam splitter, a curved reflector, etc. It should be noted that in different embodiments, the incident angle between the projection light beam and the reflective guiding element can be different, and is not limited to the above-mentioned vertical angle.

[0056] In some other technical solutions of this embodiment, the reflective guiding element 1 is driven by a driving mechanism to move linearly to guide the incident light to an outgoing light path in different directions. Obviously, this technical solution can change the reflection angle of the projection light beam on the reflective guiding element 1 during the linear movement, for example Figure 9 、 Figure 10 As shown, when the reflective guiding element 1 is configured as a multi-faceted reflector, the projection beam can fall on different reflective surfaces, thereby achieving multi-directional projection switching. Since the reflective surface of a curved reflector has different curvatures at different points, it can also be a curved reflector. The displacement of the reflective guiding element 1 can be achieved by configuring the drive mechanism as a screw mechanism, a slider mechanism, a telescopic rod mechanism, etc., which will not be repeated here.

[0057] In this embodiment, at least one of the projection lenses is connected with a shift mechanism, and the shift mechanism includes a base 12 and a mounting portion 13 for connecting the projection lens, and the mounting portion 13 slides in a direction perpendicular to the optical axis of the projection lens to be adjustably connected to the base 12. For the sake of convenience, the above-mentioned lens 2 7 is connected with a shift mechanism. When the shift mechanism is actuated, the mounting portion 13 is actuated to drive the lens 2 7 to move synchronously, thereby adjusting the position of the optical axis and changing the position of the projection image. Furthermore, an elastic member 14 that is telescopically deformed along the sliding adjustment direction is provided between the mounting portion 13 and the base 12, and an adjustment component that moves along the sliding adjustment direction and abuts against the mounting portion 13 is provided on the base 12. As Figure 2 、 Figure 4 、 Figure 5In this embodiment, the adjustment member is a screw 15 threaded onto the base 12. The screw 15 pushes the mounting portion 13 upward relative to the base 12. When the second lens 7 is desired to move downward, the screw 15 reverses, allowing the downward movement to occur through the gravity of the second lens 7 and the mounting portion 13. At this point, the elastic member 14 releases its stored deformation energy, thereby improving the shift efficiency. The mounting portion 13 and the base 12 are connected by a linear guide member. This linear guide member includes a guide hole 16 and a guide rod 17. The guide rod 17 is provided on the base 12, and the guide hole 16 is provided on the mounting portion 13 to accommodate the guide rod 17. Alternatively, the linear guide member may be a slide rail provided on the base 12 and a slider provided on the mounting portion 13. When the slide rail and slider cooperate, linear guidance can also be achieved. Thus, this embodiment effectively achieves the shift of the second lens 7 using the screw 15. Of course, the screw 15 in this embodiment can also be connected to a drive device to achieve automated tightening. In this embodiment, the elastic member 14 can be sleeved on the guide rod 17 , with two ends respectively abutting against the base 12 and the mounting portion 13 .

[0058] In other embodiments, Figures 11 to 13 As shown, the adjustment component can also be configured as a linear displacement module 18 (slide rail and slider component), a screw and block component 19, a gear rack component 20, etc., to achieve linear displacement of the lens 2 7 relative to the base 12.

[0059] Therefore, this embodiment can adjust the projection position deviation through the shift mechanism to meet the projection requirements.

[0060] like Figure 3As shown, in this embodiment, to improve the projection beam's accuracy, a detection assembly is also included. The detection assembly comprises a detection device 21 and a sensing element 22. The sensing element 22 is connected to the reflective guiding element 1. The detection device 21 detects the movement of the sensing element 22 to detect changes in the position of the reflective guiding element 1. Whether the reflective guiding element 1 is adjusted by rotation or linear motion, the detection assembly can detect position. Taking rotational adjustment as an example, the sensing element 22 is a magnetic member connected to the reflective guiding element 1, and the detection device 21 is a Hall effect sensor. The Hall effect sensor is used to detect changes in the magnetic field during the rotation of the magnetic member to determine the rotation angle of the reflective guiding element 1. The Hall effect sensor is mounted on a Hall effect circuit board mounted on the base 4. It can be seen that the Hall effect sensor and the magnetic member are arranged in a corresponding manner. Therefore, the Hall effect sensor calculates the rotation angle of the reflective guiding element 1 based on the magnetic field changes caused by the rotation of the magnetic member and makes corrections based on a preset angle, enabling the drive mechanism to fine-tune the angle until the required angle is met, thereby ensuring the accuracy of the projection path. When using linear motion to adjust the position of the reflective guiding element 1, data feedback is also achieved through the cooperation of the distance sensor and the target. It can be seen that when the positions of the detection device 21 and the sensing element 22 are interchanged, that is, the detection device 21 is connected to the reflective guiding element 1 and moves with the reflective guiding element 1, and the detection device 21 cooperates with the sensing element 22 at different positions to feedback its position changes, angle correction can still be achieved effectively.

[0061] On the basis of the above embodiment, the projection device is applied to a vehicle to form a vehicle-mounted projection, such as Figure 14 Specifically, this embodiment further discloses an in-vehicle projector, comprising the above-described projection device; wherein one outgoing light path is directed in a first direction toward the front of the vehicle, and the other outgoing light path is directed in a second direction toward the rear of the vehicle; screens are provided in the first direction and the second direction, respectively, for the projection beam to illuminate the screens to form a projection image. In this embodiment, the screens can be fixed, pull-down, or self-supporting screens installed outside the vehicle.

[0062] Furthermore, to facilitate viewing for users, the screen in the second direction is coated with a rear projection film so that the projected image is displayed on the back of the screen. This can prevent users from carrying more accessories when going out, thereby improving the user experience. In other embodiments, the driving mechanism is linked to the vehicle's tailgate signal. When the driving mechanism drives the reflective guiding element 1 to guide the projection light beam to the second direction, the tailgate automatically opens. When the user controls the driving mechanism to drive the reflective guiding element 1, if the emission direction of the projection light beam needs to be configured to the second direction, the tailgate can be automatically opened at the same time, so that the projection image is directly projected onto the self-supporting screen outside the vehicle.

[0063] In order to meet more user needs, in this embodiment, Figure 14 As shown, it also includes a rotating mechanism, the fixed end of the rotating mechanism is connected to the body of the vehicle, and the free end of the rotating mechanism is connected to the projection device to drive the projection device to rotate along the horizontal plane and / or pitch along the vertical plane. The projection device can realize side window projection when rotating along the horizontal plane, and realize roof projection when pitching along the vertical plane, thereby further improving the applicable environment of the projection device. Generally speaking, the rotating mechanism includes a horizontal rotation mechanism and a pitch rotation mechanism. The projection setting can be connected to the horizontal rotation mechanism, and the horizontal rotation mechanism is connected to the pitch rotation mechanism. Therefore, when the horizontal rotation mechanism is driven, side window projection can be realized, and when the pitch rotation mechanism is driven, roof projection can be realized. Both the horizontal rotation mechanism and the pitch rotation mechanism can be realized by a simple motor rotation structure. As Figure 14 Specifically, when panning and tilting can be achieved simultaneously, the panning mechanism includes a second motor 23, and the tilting mechanism includes a third motor 24. The fixed end of the third motor 24 is connected to the vehicle body, and the free end of the third motor 24 is connected to the fixed end of the second motor 23. The free end of the second motor 23 is connected to the projection device. Of course, a gear set, a connecting rod mechanism, etc. can also be provided to achieve panning and / or tilting.

[0064] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A lens assembly, characterized in that: It includes a projection lens, a reflective guiding element and a driving mechanism. The reflective guiding element is driven by the driving mechanism to switch between at least two positions. The reflective guiding element is in different positions to guide the incident light to output light paths in different directions. The projection lens is respectively arranged on each output light path.

2. A lens assembly according to claim 1, characterized in that: The reflective guiding element is driven by the driving mechanism to rotate so as to guide the incident light to the outgoing light paths in different directions, or the reflective guiding element is driven by the driving mechanism to move linearly so as to guide the incident light to the outgoing light paths in different directions.

3. A lens assembly according to claim 2, characterized in that: The driving mechanism includes a motor and a worm gear assembly. The motor is connected to the reflective guide element through the worm gear assembly to drive the reflective guide element to rotate.

4. The lens assembly according to claim 1, wherein: At least one of the projection lenses is connected to a shift mechanism, which includes a base and a mounting portion for connecting the projection lens. The mounting portion slides in a direction perpendicular to the optical axis of the projection lens to be adjustably connected to the base.

5. A lens assembly according to claim 4, characterized in that: An elastic member that is capable of stretching and deforming along a sliding adjustment direction is provided between the mounting portion and the seat body, and an adjusting component that is movable along the sliding adjustment direction and abuts against the mounting portion is provided on the seat body.

6. A lens assembly according to claim 5, characterized in that: The adjusting component is a screw threaded on the seat body.

7. The lens assembly according to claim 1, wherein: Also included is a detection assembly, which includes a detection device and a sensing element; The sensing element is connected to the reflective guiding element, and the detecting device detects the movement of the sensing element to detect the position change of the reflective guiding element; or, the detecting device is connected to the reflective guiding element, and the detecting device follows the movement of the reflective guiding element and cooperates with the sensing element at different positions to feedback its position change.

8. A lens assembly according to claim 7, characterized in that: The sensing element is a magnetic component connected to the reflective guiding element, and the detecting device is a Hall sensor.

9. The lens assembly according to any one of claims 1 to 8, wherein: The projection lens includes a first lens and a second lens, and the reflection guide element is arranged between the first lens and the second lens; The straight line on which the incident light exits through the first lens coincides with the straight line on which the incident light exits through the second lens.

10. Car projection, characterized in that, include: The lens assembly according to any one of claims 1 to 9; Wherein, one of the outgoing light paths is in a first direction toward the front of the vehicle, and the other outgoing light path is in a second direction toward the rear of the vehicle; Screens are respectively arranged in the first direction and the second direction, so that the projection light beam can illuminate the screens to form a projection picture.

11. The vehicle-mounted projector according to claim 10, wherein: The screen in the second direction is coated with a rear projection film so that the projection image is displayed on the back of the screen.

12. The vehicle-mounted projector according to claim 10, wherein: The driving mechanism is linked to a tailgate signal of the vehicle. When the driving mechanism drives the reflective mirror to rotate and guide the projection light beam to the second direction, the tailgate automatically opens.

13. The vehicle-mounted projector according to claim 10, wherein: It also includes a rotating mechanism, the fixed end of which is connected to the vehicle body, and the free end of which is connected to the projection device to drive the projection device to rotate along the horizontal plane and / or pitch along the vertical plane.

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