A lens fixing device and related apparatus

Abstract

Embodiments of the present application disclose a lens fixing device and related equipment, which are used for improving the stability of the position of the lens, thereby improving the display or imaging definition. The lens fixing device provided by the embodiments of the present application comprises a cover ring and a connecting piece located on the lens. The connecting piece comprises a first thread and a first connecting module, and the first thread is used for connecting with a second thread on a body. The cover ring comprises a second connecting module and a first connecting surface. The second connecting module is used for cooperating with the first connecting module to limit the rotation of the lens relative to the cover ring, and the first connecting surface is used for limiting the rotation of the cover ring relative to the body.

Description

Technical Field

[0001] This application relates to the field of optics, and more particularly to a lens fixing device and related equipment. Background Technology

[0002] Lenses are used for display and image acquisition. If a lens is used on moving equipment, it needs to be fixed to the equipment body. Since the positional relationship between the lens and the body is determined according to the specific scenario (for example, the distance between the lens and the body needs to be fine-tuned according to assembly errors), the positional relationship between the lens and the body needs to be adjusted during the lens mounting process.

[0003] Currently, adjustable lens fixing methods include springs, serrated edges with locking balls, etc.

[0004] During device movement, vibrations may occur at the connection point between the lens and the camera body. With current connection methods, the positional relationship between the lens and the camera body may change under vibration, affecting the stability of the lens position and consequently impacting display clarity and image acquisition sharpness. Summary of the Invention

[0005] This application provides a lens fixing device and related equipment to improve the stability of the lens position, thereby improving display or imaging clarity.

[0006] In a first aspect, embodiments of this application provide a lens fixing device. The lens fixing device includes a cover ring and a connector located on the lens. The connector includes a first thread and a first connecting module. The first thread is used to connect with a second thread on the camera body, and the first connecting module is used to connect the cover ring. The cover ring includes a second connecting module and a first connecting surface. The second connecting module is used to cooperate with the first connecting module to restrict rotation of the lens relative to the cover ring. The first connecting surface is used to restrict rotation of the cover ring relative to the camera body.

[0007] The lens may include lens elements and a lens barrel. A connector may be located on the lens barrel and used to connect the lens to the camera body. Optionally, the first thread, first connecting module, etc., of the connector may be machined on the lens barrel by cutting or other processes, or may be fixed to the lens barrel by adhesive, mounting, or other methods; this application does not limit this.

[0008] The first connecting surface can be a plane perpendicular to the first thread rotation axis and faces the machine body during assembly.

[0009] Optionally, the first connecting surface can be used to restrict the cover ring from rotating along the axis of rotation of the second thread, thereby restricting the rotation of the cover ring relative to the machine body.

[0010] In this embodiment, the first connecting surface restricts the rotation of the cover ring relative to the camera body (e.g., rotation along the rotation axis of the second thread), while the cooperation of the first connecting module and the second connecting module restricts the rotation of the lens relative to the cover ring. Therefore, the first connecting surface, the first connecting module, and the second connecting module can restrict the rotation of the lens along the rotation axis of the second thread. Since the lens and the camera body are connected by threads (the first thread and the second thread), restricting the rotation of the lens along the rotation axis of the second thread restricts the axial displacement of the lens along the rotation axis of the second thread. Both rotation and displacement between the lens and the camera body are restricted, thus restricting the movement of the lens relative to the camera body (movement includes translation and rotation), fixing the position of the lens relative to the camera body. Because the aforementioned multiple notches can restrict the rotation of the cover ring through relatively stable connection methods such as threads and welding, these connection methods have high reliability under vibration conditions. Therefore, in motion scenarios, the stability of the lens position can be improved, thereby improving the clarity of the display or image.

[0011] In one alternative implementation, multiple notches are provided on the first connecting surface, and these notches are locked to the connecting holes on the machine body by fasteners. The fasteners can be bolts, screws, rivets, pins, etc., and this application does not limit their use.

[0012] In this embodiment, multiple notches are locked to the camera body using fasteners such as bolts and screws. When the camera body vibrates, these fasteners use shear force to limit the movement of the cover ring relative to the camera body. This limiting method is highly reliable under vibration, improving the stability of the cover ring relative to the camera body, which in turn improves the stability of the lens relative to the camera body, thereby improving the clarity of the display or image.

[0013] In one alternative implementation, the first connecting surface is locked to the fuselage by welding, gluing, or other methods.

[0014] In one alternative implementation, the cover ring has m notches, of which n notches are used to lock with n connecting holes on the body via fasteners. Where m ≥ n.

[0015] In this embodiment, the number of notches on the cover ring is greater than or equal to the number of connecting holes on the camera body. Therefore, during the process of fixing the cover ring to the camera body, the cover ring can be rotated to fine-tune its radial position relative to the camera body, aligning the notches with the connecting holes to achieve locking. Since the lens and camera body are connected by threads, fine-tuning the radial position can achieve fine-tuning of the lens's axial position relative to the camera body. By setting a larger value for m (e.g., 30, 50, etc.), the angle of radial fine-tuning can be reduced, which, in axial terms, reduces the error in the distance between the lens and the camera body.

[0016] For example, if m=36 and n=6, the notch on the cover ring can be aligned with the connecting hole on the camera body within a fine adjustment range of 5° (360°÷36÷2=5°), thereby limiting the axial position error of the lens relative to the camera body to within 5°, resulting in high accuracy of the axial position of the lens relative to the camera body.

[0017] It is worth noting that, in the embodiments of this application, unless otherwise specified, radial and axial generally refer to the radial and axial directions of the rotation axis of the second thread.

[0018] In one alternative implementation, the number of notches on the cover ring is m, and these m notches are used to lock with m of the n connecting holes on the body via fasteners. Where m ≤ n.

[0019] In this embodiment, the number of notches on the cover ring is less than or equal to the number of connecting holes on the camera body. Therefore, during the process of fixing the cover ring to the camera body, the cover ring can be rotated to fine-tune its radial position relative to the camera body, aligning the notches with the connecting holes to achieve locking. Since the lens and camera body are connected by threads, fine-tuning the radial position can achieve fine-tuning of the lens's axial position relative to the camera body. By setting a larger n (e.g., 30, 50, etc.), the angle of radial fine-tuning can be reduced, which, in axial terms, reduces the error in the distance between the lens and the camera body.

[0020] For example, if m=4 and n=30, the notch on the cover ring can be aligned with the connecting hole on the camera body within a fine adjustment range of 6° (360°÷30÷2=6°), thereby limiting the axial position error of the lens relative to the camera body to within 6°, resulting in high accuracy of the axial position of the lens relative to the camera body.

[0021] In this embodiment, if the included angle between two adjacent notches among the m notches on the cover ring is θ1 (i.e., the angle between the line connecting two adjacent notches to the center of the circle is θ1 when the m notches are distributed along the circle), and the angle between two adjacent connecting holes among the n connecting holes on the body is θ2 (i.e., the angle between the line connecting two adjacent notches to the center of the circle is θ2 when the n connecting holes are distributed along the circle), then θ1 and θ2 can both be integer multiples of a certain angle, so that the notches 3221 and the connecting holes can be aligned with each other and locked.

[0022] For example, if m notches on the cover ring are evenly distributed along a circle, and the included angle between adjacent notches is θ1 = 45°; and n connecting holes on the body are evenly distributed along a circle, and the included angle between adjacent connecting holes is θ2 = 30°, then θ1 and θ2 are both integer multiples of 15°. Every 15° rotation will align the notches with the connecting holes.

[0023] Alternatively, θ1 and θ2 can be multiples of each other. For example, if the number of notches m on the cover ring is greater than the number of connecting holes n on the machine body, θ2 can be an integer multiple of θ1; if m is less than n, θ1 can be an integer multiple of θ2.

[0024] In one alternative implementation, a plurality of notches are provided on the first connecting surface, which are used to engage with protrusions on the body to restrict the rotation of the cover ring relative to the body.

[0025] In this embodiment, the rotation of the cover ring relative to the camera body is restricted by the cooperation of the notch and the protrusion. Since the structure of the notch and the protrusion is simple, the structural complexity and cost of the lens fixing device can be reduced.

[0026] In one alternative implementation, the first connecting surface includes a plurality of protrusions for engaging with connecting holes on the body to restrict rotation of the cover ring relative to the body.

[0027] In this embodiment, the rotation of the cover ring relative to the camera body is restricted by the cooperation between the protrusion and the connecting hole. Since the structure of the protrusion and the connecting hole is simple, the structural complexity and cost of the lens fixing device can be reduced.

[0028] In one alternative implementation, if the positional tolerance (i.e. axial tolerance) of the lens along the rotation axis of the second thread is δ, then the pitch l of the first thread, the distance D between any of the multiple notches on the cover ring and the rotation axis of the second thread, and the maximum distance d between adjacent notches among the multiple notches conform to the correspondence shown in Formula 1 below.

[0029]

[0030] Formula 1

[0031] In this embodiment, the right side of Formula 1 represents the actual position error of the lens along the rotation axis of the second thread. By adjusting d and D according to Formula 1, the actual position error can be controlled within the position tolerance error δ, resulting in a small error and high accuracy in the lens position along the axial direction (rotation axis direction of the second thread).

[0032] In Formula 1 For radial adjustment of grain size, this application refers to it as θ / 2 (see details). Figure 8 (Description). Optionally, the multiple notches on the cap ring can be arranged circumferentially, and the multiple notches can be evenly distributed along the circumference. Then, the relationship between the number of notches m on the cap ring and the radial adjustment particle size θ / 2 is: Therefore, the positional tolerance δ of the lens along the rotation axis of the second thread (the axial positional error of the lens), the pitch l of the first thread, and the number of notches m on the cover ring conform to the following formula 2.

[0033] .

[0034] Formula 2

[0035] In one alternative implementation, the first connecting module includes a first groove, and the second connecting module includes a first protrusion, the first groove being used to engage with the first protrusion to limit the rotation of the lens relative to the cover ring.

[0036] In this embodiment, the rotation of the lens relative to the cover ring is restricted by the cooperation of the groove and the protrusion, and the protrusion can slide relative to the groove along its extension direction. As long as the extension direction of the first groove has an axial component, the cover ring and the lens can slide relative to each other axially. During the assembly process of the lens and the camera body, even if the axial position of the lens relative to the camera body changes, the cover ring can be pushed towards the camera body axially to achieve a fit and lock between the cover ring and the camera body. In other words, through the cooperation of the protrusion and the groove, the cover ring can adapt to different positions of the lens relative to the camera body, absorbing the deviation in the axial position of the cover ring caused by different lens focusing positions.

[0037] In one alternative implementation, the first groove extends along the rotation axis of the first thread, and the first protrusion extends along the rotation axis of the second thread.

[0038] In one alternative implementation, the number of first grooves is the same as the number of first protrusions. If the circumference centered on the first thread rotation axis is called the first circumference, then the multiple first grooves can be evenly distributed along the first circumference; if the circumference centered on the second thread rotation axis is called the second circumference, then the multiple first protrusions can be evenly distributed along the second circumference.

[0039] Optionally, the first connecting module can be a keyway, and the second connecting module can be a slide key; this application does not limit this.

[0040] In one alternative implementation, the first connecting module includes a second protrusion extending along the rotation axis of the first thread, and the second connecting module includes a second groove extending along the rotation axis of the second thread. The second protrusion engages with the second groove to restrict rotation of the lens relative to the cover ring.

[0041] In this embodiment, the rotation of the lens relative to the cover ring is restricted by the cooperation of the groove and the protrusion, and the protrusion can slide relative to the groove along its extension direction. As long as the extension direction of the first groove has an axial component, the cover ring and the lens can slide relative to each other axially. During the assembly process of the lens and the camera body, even if the axial position of the lens relative to the camera body changes, the cover ring can be pushed towards the camera body axially to achieve a fit and lock between the cover ring and the camera body. In other words, through the cooperation of the protrusion and the groove, the cover ring can adapt to different positions of the lens relative to the camera body, absorbing the deviation in the axial position of the cover ring caused by different lens focusing positions.

[0042] In one alternative implementation, the second protrusion extends along the rotation axis of the first thread, and the second groove extends along the rotation axis of the second thread.

[0043] In one alternative implementation, the number of second protrusions is the same as the number of second grooves. If the circumference centered on the first thread rotation axis is called the first circumference, then multiple second protrusions can be evenly distributed along the first circumference; if the circumference centered on the second thread rotation axis is called the second circumference, then multiple second grooves can be evenly distributed along the second circumference.

[0044] Secondly, embodiments of this application provide a lens fixing device. The lens fixing device includes a connector. The connector is on the lens and includes a first thread and a connecting platform. The first thread is used to connect with a second thread on the camera body. A plurality of notches are provided on the first connecting surface of the connecting platform to restrict rotation of the lens relative to the camera body.

[0045] The lens may include lens elements and a lens barrel. A connector may be located on the lens barrel for connecting the lens to the camera body. Optionally, the first thread, multiple notches, etc., of the connector may be machined on the lens barrel by cutting or other processes, or may be fixed to the lens barrel by adhesive, mounting, or other methods; this application does not limit this.

[0046] Optionally, the first connecting surface can be used to restrict the connector from rotating along the rotation axis of the second thread, thereby restricting the connector (lens) from rotating relative to the camera body.

[0047] In this embodiment, multiple notches restrict the rotation of the lens along the rotation axis of the second thread. Since the lens (connector) is connected to the body via threads (first thread and second thread), restricting the lens's rotation along the rotation axis of the second thread limits its axial displacement. Both rotation and displacement between the lens and the body are restricted, thus limiting the lens's movement relative to the body (movement includes translation and rotation), fixing the lens's position relative to the body. Because these multiple notches can restrict lens rotation through relatively stable connection methods such as threads and welding, which offer high reliability under vibration, the reliability of the lens position can be improved in motion scenarios, thereby enhancing display or imaging clarity.

[0048] In one alternative implementation, multiple notches are locked to holes on the machine body by fasteners. These fasteners can be bolts, screws, rivets, pins, etc., and this application does not limit their use.

[0049] In one alternative implementation, the cover ring has m notches, of which n notches are used to lock with n connection holes on the body. Where m ≥ n.

[0050] In one alternative implementation, the number of notches on the cover ring is m, and these m notches are used to lock with m of the n connection holes on the body. Where m ≤ n.

[0051] In this embodiment of the application, if the angle between two adjacent notches among the m notches on the connector is θ1 (i.e., the angle between the line connecting two adjacent notches to the center of the circle is θ1 when the m notches are distributed along the circle), and the angle between two adjacent connecting holes among the n connecting holes on the body is θ2 (i.e., the angle between the line connecting two adjacent notches to the center of the circle is θ2 when the n connecting holes are distributed along the circle), then θ1 and θ2 can both be integer multiples of a certain angle, so that the notches 3221 and the connecting holes can be aligned with each other and locked.

[0052] For example, if m notches on the cover ring are evenly distributed along a circle, and the included angle between adjacent notches is θ1 = 45°; and n connecting holes on the body are evenly distributed along a circle, and the included angle between adjacent connecting holes is θ2 = 30°, then θ1 and θ2 are both integer multiples of 15°. Every 15° rotation will align the notches with the connecting holes.

[0053] Alternatively, θ1 and θ2 can be multiples of each other. For example, if the number of notches m on the cover ring is greater than the number of connecting holes n on the machine body, θ2 can be an integer multiple of θ1; if m is less than n, θ1 can be an integer multiple of θ2.

[0054] In one alternative implementation, a plurality of notches are provided on the first connecting surface, which are used to engage with protrusions on the fuselage to restrict the rotation of the connecting member relative to the fuselage.

[0055] In one alternative implementation, the first connecting surface includes a plurality of protrusions for engaging with connecting holes on the fuselage to restrict rotation of the connector relative to the fuselage.

[0056] In one alternative implementation, if the positional tolerance (i.e. axial tolerance) of the lens along the rotation axis of the second thread is δ, then the pitch l of the first thread, the distance D between any of the multiple notches on the cover ring and the rotation axis of the second thread, and the maximum distance d between adjacent notches among the multiple notches conform to the correspondence shown in Formula 1 below.

[0057]

[0058] Formula 1

[0059] In Formula 1 For radial adjustment of grain size, this application refers to it as θ / 2 (see details). Figure 8 (Description). Optionally, the multiple notches on the cover ring can be arranged circumferentially, and the multiple notches can be evenly distributed along the circumference. Then, the relationship between the number of notches m on the cover ring and the radial adjustment particle size θ / 2 is: Yes, the positional tolerance δ of the lens along the rotation axis of the second thread (axial position error of the lens), the pitch l of the first thread, and the number of notches m on the cover ring conform to the correspondence shown in Formula 2 below.

[0060] .

[0061] Formula 2

[0062] The beneficial effects of the second aspect are explained in the first aspect and will not be repeated here.

[0063] Thirdly, embodiments of this application also provide an optical instrument. The optical instrument includes a lens and a body, with the lens fixed to the body by the lens fixing device described in the first or second aspect.

[0064] In one alternative implementation, the fuselage includes the second thread to enable connection with the first thread on the connector.

[0065] Optionally, the body may also include connection holes. The connection holes are used to lock with multiple notches on the first or second side via fasteners.

[0066] In one alternative implementation, the camera body also includes a first circular hole coaxial with the second thread. The lens also includes a first cylinder coaxial with the first thread, the first cylinder being used to mate with the first circular hole on the camera body.

[0067] In this embodiment of the application, the high coaxiality between the lens optical axis (i.e., the rotation axis of the first thread) and the optical axis of the body (i.e., the rotation axis of the second thread) can be ensured by the cooperation between the first cylinder and the first circular hole, thus ensuring higher clarity in display or image acquisition.

[0068] It is worth noting that, in the embodiments of this application, the coaxiality between devices is an ideal state. If there is a certain deviation between the optical axes due to processing, assembly, etc., it also falls within the protection scope of the embodiments of this application.

[0069] In one alternative implementation, the camera body also includes a second cylinder coaxial with the second thread. The lens also includes a second circular hole coaxial with the first thread, the second circular hole being used to mate with the second cylinder on the camera body.

[0070] In this embodiment, the high coaxiality between the lens optical axis and the camera body optical axis can be ensured by the cooperation between the second circular hole and the second cylinder, thus ensuring higher clarity in display or image acquisition.

[0071] In one alternative implementation, the lens may include a lens barrel and lens elements, the lens elements including at least one lens, and the camera body may include an image source module or an acquisition module. A lens fixing device is used to fix the distance between at least one lens and the image source module; alternatively, the lens fixing device is used to fix the distance between at least one lens and the acquisition module.

[0072] In this embodiment, the lens fixing device can fix the distance between at least one lens and the image source module (e.g., the distance is the focal length of the lens or the equivalent focal length of the lens group), thereby achieving a clear display effect. The lens fixing device can also fix the distance between at least one lens and the acquisition module (e.g., the distance is the focal length of the lens or the equivalent focal length of the lens group), thereby achieving clear imaging on the acquisition module.

[0073] It is worth noting that at least one lens can be a single lens or a lens group; if it is a single lens, the distance between the lens and the image source module / acquisition module is the distance between the object-side principal plane of the lens and the image source module / acquisition module; if it is a lens group, the distance between the lens group and the image source module / acquisition module is the distance between the object-side principal plane of the lens group and the image source module / acquisition module.

[0074] In one alternative implementation, the optical instrument is a data acquisition device, and the body of the data acquisition device includes a data acquisition module. The lens fixing device can be used to fix the distance between the lens and the data acquisition module.

[0075] In one alternative implementation, the optical instrument is a display device, and the body of the display device includes an image source module. The lens fixing device can be used to fix the distance between the lens and the image source module.

[0076] Optionally, the display device may be a vehicle headlight, a head-up display (HUD), etc., and this application does not limit it.

[0077] Fourthly, embodiments of this application provide a means of transportation, the means of transportation including the display device described in the third aspect, the display device being installed on the means of transportation.

[0078] In one alternative implementation, the lens includes a lens barrel and lens elements, and the vehicle also includes a reflective element. The lens elements are used to project light from the image source module onto the reflective element, which in turn reflects the light.

[0079] The beneficial effects of the third and fourth aspects are the same as those of the first and second aspects, and will not be repeated here. Attached Figure Description

[0080] Figure 1 To display a schematic diagram of the system structure;

[0081] Figure 2 This is a schematic diagram of the image acquisition system.

[0082] Figure 3 This is a schematic diagram of the lens fixing device provided in the embodiments of this application;

[0083] Figure 4 This is a schematic diagram of the assembly process provided in an embodiment of this application;

[0084] Figure 5 This is a schematic diagram showing the distribution of multiple notches on the cover ring and connecting holes on the body in an embodiment of this application.

[0085] Figure 6 This is another schematic diagram showing the distribution of multiple notches on the cover ring and connecting holes on the body according to an embodiment of this application;

[0086] Figure 7 This is a schematic diagram of the cover ring provided in an embodiment of this application;

[0087] Figure 8 A schematic diagram illustrating the positional relationship between multiple notches and connecting holes provided in an embodiment of this application;

[0088] Figure 9 This is a schematic diagram of the lens structure provided in an embodiment of this application;

[0089] Figure 10a Another structural schematic diagram of the connector provided in the embodiments of this application;

[0090] Figure 10b Another structural schematic diagram of the connector provided in the embodiments of this application;

[0091] Figure 11 A schematic diagram of a lens fixing device including an internal thread provided for an embodiment of this application;

[0092] Figure 12 This is a schematic diagram of another lens fixing device provided in an embodiment of this application. Detailed Implementation

[0093] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0094] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of units is not necessarily limited to those units, but may include other units not explicitly listed or inherent to those processes, methods, products, or apparatuses. Additionally, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0095] A lens can refract and converge a light beam, thus projecting the beam onto a specific location for display or image capture. If a lens is used for display, the structure of the display system is as follows: Figure 1 As shown. In the display system, the image source module emits a light beam, and the lens can focus the light beam from the image source module onto a certain plane, thereby displaying an image on that plane. Optionally, this display system can be applied to projection displays, vehicle lights, head-up displays, searchlights, projectors, and other fields, and this application does not limit it to these applications.

[0096] If the lens is used for image acquisition, the structure of the image acquisition system is as follows: Figure 2 As shown, the lens can focus light from the object being captured onto a plane. The acquisition module captures an image of the object from this plane. Optionally, the image display scene can be applied in fields such as photography and aerospace; this application does not limit this application. Optionally, the object being captured can be a living organism such as a person, animal, or plant; it can also be an environment such as mountains, rivers, buildings, or indoor spaces; or it can be equipment such as robots or production and processing equipment; this application does not limit this application.

[0097] In the aforementioned display and image acquisition systems, the positional relationship between the lens and the image source module / acquisition module is determined based on the system's optical design. Both the lens and the image source module / acquisition module are mounted on the device's body; therefore, by controlling the positional relationship between the lens and the body, the positional relationship between the lens and the image source module / acquisition module can be controlled.

[0098] Lenses, camera bodies, image source modules, and acquisition modules may contain manufacturing and assembly errors. To reduce the impact of these errors on the equipment's optical system, the lens position is adjusted to ensure the optical system conforms to the predetermined optical design before the lens is fixed to the camera body. For example, in a display system, adjusting the lens position so that the optical system composed of the lens and image source module conforms to the predetermined optical design, and then fixing the lens position, achieves a clear display effect. Similarly, in an image acquisition system, adjusting the lens position so that the optical system composed of the lens and acquisition module conforms to the predetermined optical design, and then fixing the lens position, allows for the acquisition of a clear image.

[0099] Therefore, during lens fixing, the positional relationship between the lens and the camera body needs to be adjusted. Currently, adjustable lens fixing methods include springs and sawtooth + locking ball mechanisms. If the device is used in a moving environment (e.g., a moving vehicle), vibration may occur at the connection point between the lens and the camera body. Under vibration, these adjustable connection methods may cause changes in the positional relationship between the lens and the camera body, affecting the stability of the lens position and consequently impacting display clarity and image capture sharpness. The clarity of the display and image capture gradually deteriorates with the accumulation of vibration over time, and may even cause the lens to detach.

[0100] To address the aforementioned deficiencies, this application provides a lens fixing device and related equipment. The lens fixing device provided in this application restricts the radial rotation of the lens by locking it to the camera body through multiple notches, and restricts the axial displacement of the lens by connecting it to the camera body through threads. This improves the stability of the lens position in motion scenarios, thereby enhancing display clarity and image acquisition clarity.

[0101] like Figure 3 As shown, the lens fixing device 3000 provided in this embodiment includes a connector 3100 and a cover ring 3200. The connector 3100 is located on the lens and includes a first thread 3110 and a first connecting module 3120. The first thread 3110 is used to connect with a second thread on the camera body, and the first connecting module 3120 is used to connect the cover ring 3200. The cover ring 3200 includes a second connecting module 3210 and a first connecting surface 3220. The second connecting module 3210 cooperates with the first connecting module 3120 to restrict the connector 3100 from rotating relative to the cover ring 3200. The first connecting surface 3220 has multiple notches 3221, which restrict the cover ring 3200 from rotating relative to the camera body. Specifically, the multiple notches 3221 can be used to restrict the cover ring 3200 from rotating along the rotation axis of the second thread.

[0102] The lens may include lens elements and a lens barrel. The connector 3100 may be located on the lens barrel and is used to connect the lens to the camera body. Optionally, the first thread 3110, the first connecting module 3120, etc. of the connector 3100 may be obtained by machining on the lens barrel through processes such as cutting, or may be fixed on the lens barrel by means of adhesive bonding, mounting, etc. This application does not limit this.

[0103] The lens fixing device 3000 provided in this application embodiment is used to fix the position of the lens relative to the camera body. Therefore, the positional relationship between the lens (or connector 3100) and the camera body is described with reference to the rotation axis of the second thread on the camera body. Specifically, the rotation axis direction of the second thread (i.e. Figure 3 The direction of the longest straight line in the middle is called the axial direction, and the direction perpendicular to the axial direction is called the radial direction.

[0104] In the lens fixing device 3000 provided in this application embodiment, the first connecting surface 3220 of the cover ring 3200 is a plane perpendicular to the first thread rotation axis, and during the assembly process with the camera body, the first connecting surface 3220 faces the camera body. Multiple notches 3221 on the cover ring 3200 (e.g.) Figure 3The cover ring 3200 has four notches (4 in the middle) for locking with multiple connecting holes on the machine body, thereby restricting the radial rotation of the cover ring 3200 relative to the machine body (i.e., restricting the rotation of the cover ring 3200 along the axis of rotation of the second thread). Optionally, the cover ring 3200 may not include the notches 3221, and the radial rotation of the cover ring 3200 relative to the machine body may be restricted by the first connecting surface (e.g., by welding, gluing, etc.), which is not limited in this application.

[0105] The second connecting module 3210 on the cover ring 3200 is used to cooperate with the first connecting module 3120 on the connector 3100 to restrict the connector 3100 from rotating relative to the cover ring 3200. By combining the above-mentioned multiple notches 3221 restricting the radial rotation of the cover ring 3200, the radial rotation of the connector 3100 can be restricted (i.e., the connector 3100 is restricted from rotating along the axis of rotation of the second thread).

[0106] Because the connector 3100 is connected to the camera body by a thread (the engagement of the first thread 3110 and the second thread), and the multiple notches 3221, the second connecting module 3210 and the first connecting module 3120 restrict the connector 3100 from rotating along the rotation axis of the second thread (i.e., restricting the radial rotation of the lens), the connector 3100 cannot translate along the rotation axis of the second thread, thus restricting the axial displacement of the connector 3100, thereby restricting the axial displacement of the lens.

[0107] In summary, the lens fixing device 3000 provided in this application embodiment restricts both radial rotation and displacement between the lens and the camera body, thus limiting the movement of the lens relative to the camera body (movement includes translation and rotation), and fixing the position of the lens relative to the camera body. Because the aforementioned multiple notches can restrict the rotation of the cover ring through relatively stable connection methods such as threads and welding, these connection methods have high reliability under vibration conditions. Therefore, in motion scenarios, the stability of the lens position can be improved, thereby improving the clarity of display or imaging.

[0108] In this embodiment, the lens may include a lens element and a lens barrel. A connector 3100 may be located on the lens barrel for connecting the lens to the camera body. The lens element may include at least one lens (a lens or lens group), and the axis of symmetry of the lens's optical system is called the optical axis of the lens; that is, the axis of symmetry of at least one lens in the lens is called the optical axis of the lens. The axis of symmetry of the first thread 3110 coincides with the optical axis of the lens.

[0109] The camera body may include an image source module or a capture module, and the axis of symmetry of the optical system of the image source module or capture module is called the optical axis of the camera body. In order to achieve a clear display effect or capture a clear image, the optical axis of the lens should be coaxial with the optical axis of the camera body.

[0110] In this embodiment, the lens fixing device 3000 is used to fix the lens to the camera body, thereby fixing the position between the lens and the image source module / acquisition module on the camera body. An important parameter is the distance between the lens and the image source module / acquisition module. The lens includes at least one lens; if it includes a single lens, the distance is the distance between the object-side principal plane of that lens and the image source module / acquisition module; if it includes a lens group, the distance is the distance between the object-side principal plane of that lens group and the image source module / acquisition module.

[0111] A lens can be obtained by mounting at least one of the aforementioned lenses onto a lens barrel. Due to potential tolerances in the assembly between the lens and the lens barrel, there are tolerances in the focal lengths of different lenses. By controlling the axial positional tolerance between the lens and the camera body within this focal length tolerance range, a clear display / image acquisition effect can be achieved. In other words, in this embodiment, as long as the axial distance error between the lens and the image source module / acquisition module is controlled to be no greater than this focal length tolerance (also referred to as the axial positional tolerance δ in this application), a clear display effect and clear image acquisition can be achieved.

[0112] In this embodiment, the lens is fixed relative to the camera body using a lens fixing device 3000. To achieve a clear display effect and capture clear images, this embodiment also provides an assembly process between the lens and the camera body, such as... Figure 4 As shown, the process includes:

[0113] Step 1: Connect the first thread 3110 with the second thread and focus.

[0114] The first thread 3110 is engaged with the second thread, and then the lens is rotated (i.e., the rotating connector 3100) so that the distance between the lens and the image source module / acquisition module conforms to the design of the optical system. For example, rotating the lens changes the distance between the lens in the lens and the image source module / acquisition module, so that the image source module / acquisition module is on the focal plane of the lens.

[0115] For example, if the camera body includes a capture module, the lens position can be adjusted based on the sharpness of the captured image until the sharpness of the captured image is at its highest. For example, if the camera body includes an image source module, the lens position can be adjusted based on the sharpness of the displayed image until the sharpness of the displayed image is at its highest.

[0116] Step 2: Connect the cover ring 3200 to the connector 3100.

[0117] Specifically, the first connection module 3120 is paired with the second connection module 3210. For example... Figure 3 In the middle, the second connecting module 3210 (protrusion) is inserted into the first connecting module 3120 (recess).

[0118] Step 3: Make the first connecting surface 3220 contact the surface of the fuselage.

[0119] Push the cover ring 3200 toward the fuselage until the first connecting surface 3220 contacts the fuselage surface.

[0120] Step 4: Rotate the cover ring 3200 to lock the multiple notches 3221 with the connecting holes.

[0121] Since the positions of the multiple notches 3221 on the cover ring 3200 and the connecting holes on the machine body may not completely correspond, the cover ring 3200 can be rotated until the multiple notches 3221 are aligned with the connecting holes on the machine body to lock the multiple notches 3221 and the connecting holes.

[0122] In this embodiment, the radial position of the cover ring 3200 relative to the camera body is finely adjusted by rotating the cover ring 3200, aligning the notch 3221 with the connecting hole to achieve locking. During the process of fine-tuning the radial position of the cover ring 3200, the radial position of the lens relative to the camera body is also finely adjusted accordingly. Since the lens (connector 3100) and the camera body are connected by threads, the fine adjustment of the radial position can achieve the fine adjustment of the axial position of the lens (connector 3100) relative to the camera body. The radial fine-tuning angle can be reduced by increasing the number of notches 3221 or connecting holes, which, in axial terms, reduces the error in the distance between the lens and the camera body.

[0123] In this embodiment, the number of notches 3221 is not limited. By reasonably setting the relationship between the number of notches 3221 on the cover ring 3200 and the number of connecting holes on the machine body, the cover ring 3200 can be rotated along the rotation axis of the second thread (i.e., rotated along the rotation axis of the machine body) before locking the multiple notches 3221 with the connecting holes, thereby aligning the notches 3221 with the connecting holes and achieving locking. Assume that the number of notches 3221 on the cover ring 3200 is m, and the number of connecting holes on the machine body is n.

[0124] In one alternative implementation, m ≥ n, and n of the m notches are used to lock with the n connecting holes. Taking m=8 and n=4 as an example, as follows... Figure 5 As shown, eight notches 3221 (3221-1 to 3221-8) are evenly distributed on the circumference of the first connecting surface 3220 with a diameter of D, and four connecting holes are evenly distributed on the circumference of the fuselage surface with a diameter of D. Four of the eight notches 3221 are used to lock with the four connecting holes on the fuselage. Since the eight notches on the cover ring 3200 are evenly distributed, the cover ring 3200 can be rotated in increments of (360°÷8)÷2=22.5° to align the notch closest to the connecting hole with that hole, thus achieving locking.

[0125] Specifically, in this embodiment, the radial adjustment granularity of the cover ring 3200 and the pitch of the first thread 3110 on the connector 3100 determine the axial adjustment granularity of the lens, i.e., the axial error. The axial error can be reduced by increasing the number of notches 3221 or the number of connecting holes.

[0126] The structure of the 3200 cover ring is as follows Figure 7 As shown, multiple notches 3221 on the cover ring 3200 are evenly distributed along a circumference of radius D (i.e., the distance between any notch 3221 and the first thread rotation axis is D, which becomes the distance between the notch 3221 and the second thread rotation axis after assembly, also D). The distance between adjacent notches 3221 is d. The figure uses m=8, i.e., 8 notches 3221 on the cover ring 3200, as an example for illustration.

[0127] If, after step 3 of the assembly process, there is a connecting hole between notch 6 and notch 7, then it includes... Figure 8 The three cases shown:

[0128] Scenario 1: If the connecting hole is exactly on the center line of the two notches, then the notch 6 can be adjusted by rotating the cover ring 3200 degrees (e.g., Figure 5 Gap 3221-6) or gap 7 (e.g.) Figure 5 The notch 3221-7 in the middle is aligned with the connecting hole, thereby locking the notch 3221 with the connecting hole. In this case, the radial error is... .

[0129] Scenario 2: If the connecting hole is exactly on a notch, then there is no need to rotate the cap ring 3200 to align the notch 7 with the connecting hole, thereby locking the notch 3221 with the connecting hole. In this case, the radial error is 0°.

[0130] Case 3: The connecting hole is located between the center line of the two notches and one notch. Since notch 7 is closer to the connecting hole than notch 6, notch 7 can be aligned with the connecting hole by rotating the cover ring 3200, thus locking notch 3221 with the connecting hole. In this case, the radial error is less than... .

[0131] Cases 1 to 3 illustrate the fit between the notch in the cover ring 3200 and the connecting hole on the body. Based on cases 1 to 3, in this embodiment, 0 ≤ radial error ≤ .

[0132] like Figure 9As shown, the pitch of the first thread 3110 on the connector 3100 is l. Therefore, the first thread 3110 can convert radial error into axial position error. Since in a thread, one radial rotation results in an axial movement distance equal to the pitch l, and 0 ≤ radial error ≤ 0, the error can be converted into an axial position error. Therefore, the axial position error is: 0 ≤ axial error ≤ .

[0133] Optionally, in this embodiment, the multiple notches may not be evenly distributed. In this case, the axial error is greatest if the connecting hole is on the centerline of the adjacent notch with the largest distance between them. That is, if the distance between the adjacent notches with the largest distance between them is d, the axial position error is: 0 ≤ axial error ≤ .

[0134] In other words, in this embodiment of the application, the maximum error in the axial direction is Based on the above explanation of the allowable error δ for axial position, it can be seen that as long as the maximum axial error is minimized... A clear display effect and clear image acquisition can be achieved if the axial position tolerance δ of the lens is less than or equal to the tolerance δ of the lens 3100 along the rotation axis of the second thread. Therefore, in this embodiment, the position tolerance δ of the lens 3100 along the rotation axis of the second thread (axial position error of the lens 3100), the pitch l of the first thread 3110, the distance D between any notch in the plurality of notches 3221 and the rotation axis of the second thread, and the maximum distance d between adjacent notches in the plurality of notches 3221 can conform to the correspondence shown in Formula 1 below.

[0135] .

[0136] Formula 1

[0137] In the embodiments of this application, by adjusting D and d (e.g., reducing d / 2D), the axial error can be reduced, thereby achieving high-precision axial position adjustment. On the one hand, this can improve display clarity and image acquisition clarity; on the other hand, it can be adapted to more scenarios. For example, if the allowable axial position error δ of the optical system decreases, D and d can be adjusted to accommodate a smaller allowable axial position error δ.

[0138] In the embodiments of this application, the number m of notches 3221 opened in the cover ring 3200 is not limited, and can be 10, 30, 50, etc., and this application does not limit it.

[0139] In this embodiment, θ / 2 is used as the radial adjustment particle size. By controlling the number of m, the axial adjustment particle size corresponding to θ / 2 can be controlled within a range not greater than δ. Optionally, the multiple notches 3221 on the cover ring 3200 can be evenly distributed along a circumference of radius D (i.e., the distance between any notch and the first thread rotation axis is D, which becomes the distance between the notch and the second thread rotation axis after assembly, and this distance is also D). Then, the relationship between the number m of notches 3221 on the cover ring 3200 and the radial adjustment particle size θ / 2 is: Therefore, the positional tolerance δ of the lens 3100 along the rotation axis of the second thread (axial position error of the lens 3100), the pitch l of the first thread 3110, and the number m of notches 3221 on the cover ring 3200 conform to the correspondence shown in Formula 2 below.

[0140] .

[0141] Formula 2

[0142] Optionally, the axial position tolerance δ ≤ 100 μm. For example, δ can be 100 μm, 50 μm, 20 μm, 20 μm, 5 μm, etc., and this application does not limit it.

[0143] In this embodiment of the application, if the included angle between two adjacent notches of m notches 3221 on the cover ring 3200 is θ1 (i.e., the included angle between the line connecting two adjacent notches to the center of the circle (i.e., the axis of symmetry of the first thread) of the m notches 3221 distributed along the circle is θ1), and the included angle between two adjacent connecting holes of n connecting holes on the machine body is θ2 (i.e., the included angle between the line connecting two adjacent notches to the center of the circle of the n connecting holes distributed along the circle is θ2), then θ1 and θ2 can both be integer multiples of a certain angle, so that the notches 3221 and the connecting holes can be aligned with each other and locked.

[0144] For example, if m notches on the cover ring are evenly distributed along a circle, and the included angle between adjacent notches is θ1 = 45°; and n connecting holes on the body are evenly distributed along a circle, and the included angle between adjacent connecting holes is θ2 = 30°, then θ1 and θ2 are both integer multiples of 15°. Every 15° rotation will align the notches with the connecting holes.

[0145] For example, if the number m of notches 3221 on the cover ring 3200 is greater than the number n of connecting holes on the body, then θ2 is an integer multiple of θ1; if m is less than n, then θ1 is an integer multiple of θ2. Alternatively, θ1 and θ2 can be multiples of each other. For example, if the number m of notches on the cover ring is greater than the number n of connecting holes on the body, θ2 can be an integer multiple of θ1; if m is less than n, θ1 can be an integer multiple of θ2.

[0146] Optionally, m ≤ n can be used, in which case the m notches 3221 on the cover ring are used to lock with the m connecting holes out of the n connecting holes on the body. Similarly, if m = 4 and n = 8 (e.g. Figure 6 As shown), the cap ring 3200 can be adjusted radially with a particle size of (360°÷8)÷2=22.5° to achieve alignment between the notch 3221 and the connecting hole.

[0147] In this case, the radial error is determined by the distance between the n connecting holes on the fuselage. For example... Figure 6 As shown, multiple connecting holes on the machine body are evenly distributed on a circle of radius D (i.e., the distance between any connecting hole and the rotating shaft of the second thread is D), and the distance between adjacent connecting holes is d'. The diagram uses n=8, i.e., 8 connecting holes on the machine body, as an example for illustration. See [link to diagram]. Figure 7 As can be seen from the description, in the embodiments of this application, 0 ≤ radial error ≤ .

[0148] Therefore, in this embodiment, the positional tolerance δ of the lens 3100 along the rotation axis direction of the second thread (axial position error of the lens 3100), the distance D between the first thread 3110, any one of the multiple connecting holes on the body and the rotation axis of the second thread, and the maximum distance d' between adjacent connecting holes among the multiple connecting holes can conform to the correspondence shown in Formula 3 below.

[0149] .

[0150] Formula 3

[0151] In this embodiment, θ / 2 is used as the radial adjustment particle size. By controlling the number of n, the axial adjustment particle size corresponding to θ / 2 can be controlled within a range not greater than δ. Optionally, the multiple connecting holes on the machine body can be evenly distributed along a circumference of radius D (i.e., the distance between any connecting hole and the second thread rotation axis is D). Then, the relationship between the number of connecting holes n on the machine body and the radial adjustment particle size θ / 2 is: Therefore, the positional tolerance δ of the lens 3100 along the rotation axis of the second thread (axial position error of the lens 3100), the pitch l of the first thread 3110, and the number of connecting holes n on the body conform to the correspondence shown in Formula 4 below.

[0152]

[0153] Formula 4

[0154] In this embodiment, multiple notches 3221 are used to restrict the rotation of the cover ring 3200 along the rotation axis of the second thread. Optionally, the multiple notches 3221 can be locked to the connecting hole on the machine body by a fastener. The fastener can be a bolt, screw, rivet, pin, etc., and this application does not limit it.

[0155] In this embodiment, multiple notches are locked to the camera body using fasteners such as bolts and screws. When the camera body vibrates, these fasteners use shear force to limit the movement of the cover ring relative to the camera body. This limiting method is highly reliable under vibration, improving the stability of the cover ring relative to the camera body, which in turn improves the stability of the lens relative to the camera body, thereby improving the clarity of the display or image.

[0156] Optionally, the shape of the multiple notches 3221 can be determined according to different fastener structures. For example, if the fastener is a bolt, screw, etc., each of the multiple notches 3221 can be a circular hole, and threads can be made on the circular hole to mate with the fastener. Optionally, if the fastener is a self-tapping screw, threads may not be made on the circular hole. Optionally, if the fastener is a self-tapping screw, connecting holes may not be made on the machine body, and the self-tapping screw can be directly driven into the machine body.

[0157] Optionally, if the fastener is a pin, rivet, or similar component, the shape of the multiple notches 3221 can be determined based on the cross-section of the fastener. For example, if the fastener is a square pin, each of the multiple notches 3221 can be a square hole.

[0158] Optionally, in addition to using threads, pins, rivets, etc., the multiple notches 3221 on the cover ring 3200 and the connecting holes on the machine body can also be locked by welding, gluing, etc. This application does not limit this.

[0159] Optionally, the cover ring 3200 may not include multiple notches 3221. The cover ring 3200 can restrict radial rotation relative to the fuselage through the first connecting surface 3220 (e.g., by welding, gluing, etc.). This application does not limit this. This connection method does not require performing step 4 above, so the radial error is 0°, and the corresponding axial error is also smaller, resulting in higher positional accuracy.

[0160] In this embodiment, the multiple notches (m notches) on the cover ring 3200 are locked to the connection holes (n connection holes) on the body by fasteners. Alternatively, the locking method between the cover ring 3200 and the body can be changed. For example, multiple notches 3221 can be formed on the first connecting surface, and multiple protrusions (corresponding to the connection holes in the aforementioned embodiment) can be provided at corresponding positions on the body; these multiple notches 3221 are used to engage with the protrusions on the body to restrict the cover ring from rotating relative to the body. As another example, the first connecting surface may include multiple protrusions (corresponding to the notches 3221 in the aforementioned embodiment), which are used to engage with the connection holes on the body to restrict the cover ring from rotating relative to the body.

[0161] In this embodiment, the rotation of the cover ring relative to the camera body is restricted by the cooperation between the protrusion and the connecting hole. Since the structure of the protrusion and the connecting hole is simple, the structural complexity and cost of the lens fixing device 3000 can be reduced.

[0162] In this embodiment, the first connecting module 3120 and the second connecting module 3210 can also have various forms. This embodiment restricts the rotation of the connector 3100 relative to the cover ring 3200 by the cooperation between the first connecting module 3120 and the second connecting module 3210, thereby restricting the radial rotation of the connector 3100 relative to the fuselage. Therefore, the rotation direction restricted by the cooperation between the first connecting module 3120 and the second connecting module 3210 should be coaxial with the aforementioned radial rotation direction. That is, coaxial with the rotation axis of the second thread. The second thread cooperates with the first thread 3110, so the rotation direction restricted by the two connectors should be coaxial with the rotation axis of the first thread 3110 and the second thread.

[0163] One possible implementation is as follows: Figures 3 to 9 As shown, the first connecting module 3120 is a groove extending along the rotation axis direction of the first thread 3110, and the second connecting module 3210 is a protrusion extending along the rotation axis direction of the second thread. By cooperating with the first connecting module 3120 and the second connecting module 3210, the radial rotation between the connector 3100 and the cover ring 3200 can be restricted.

[0164] The number of grooves in the first connecting module 3120 matches the number of protrusions in the second connecting module 3210 (e.g., the same number, or the number of grooves being an integer multiple of the number of protrusions, etc.). Figure 3 and Figure 4 The number of protrusions and grooves is 3 each, so as to achieve the cooperation between the first connecting module 3120 and the second connecting module 3210.

[0165] If the circumference centered on the rotation axis of the first thread 3110 is called the first circumference, then the multiple grooves of the first connecting module 3120 can be evenly distributed along the first circumference; if the circumference centered on the rotation axis of the second thread is called the second circumference, then the multiple protrusions of the second connecting module 3210 can be evenly distributed along the second circumference.

[0166] Optionally, the first connecting module 3120 may be a protrusion extending along the rotation axis of the first thread 3110, and the second connecting module 3210 may be a groove extending along the rotation axis of the second thread. This application does not limit this. Similarly, the number of protrusions in the first connecting module 3120 may match the number of grooves in the second connecting module 3210. The protrusions and grooves may also be evenly distributed along the circumference. This application does not limit this.

[0167] In this embodiment, the rotation of the connector 3100 relative to the cover ring 3200 is restricted by the cooperation of the groove and the protrusion, and the protrusion can slide relative to the groove along the extension direction, that is, the cover ring 3200 and the connector 3100 can slide relative to each other axially. During the assembly process of the connector 3100 and the body, even if the axial position of the connector 3100 relative to the body changes, the cover ring 3200 can be pushed towards the body axially to achieve a fit and lock between the cover ring 3200 and the body. In other words, through the cooperation of the protrusion and the groove, the cover ring 3200 can adapt to different positions of the connector 3100 relative to the body, absorbing the deviation in the axial position of the cover ring 3200 caused by different focusing positions of the connector 3100.

[0168] Optionally, the first connecting module 3120 and the second connecting module 3210 may also have other structures to limit radial rotation between the connector 3100 and the cover ring 3200. For example Figure 10a As shown, the cover ring 3200 may further include a second connecting surface 3230, and the second connecting module 3210 may be a protrusion on the second connecting surface 3230, which extends along the rotation axis direction of the first thread 3110. This protrusion may be as follows: Figure 3 The cover ring 3200 shown is connected to the inner wall, but it may not necessarily contact the inner wall; this application does not limit this. The second connecting surface 3230 is a surface on the cover ring 3200 parallel to the first connecting surface 3220, and the second connecting surface 3230 faces the connector 3100. Correspondingly, as... Figure 10a As shown, the first connecting module 3120 may be a recess extending along the rotation axis direction of the first thread 3110.

[0169] Or such as Figure 10b As shown, the second connecting module can be a hole on the second connecting surface 3230, and the first connecting module can be a protrusion extending along the rotation axis direction of the first thread 3110.

[0170] Optionally, the first connecting module 3120 and the second connecting module 3210 may also restrict the radial rotation between the connector 3100 and the cover ring 3200 by means of chain, adhesive, magnetic attraction, shaft hole (to restrict rotation), etc. This application does not limit this.

[0171] It is worth noting that the extension direction of the protrusion and the groove is not limited in the embodiments of this application, as long as the extension direction has a component in the axial direction, so that the cover ring 3200 and the lens (connector 3100) can slide relative to each other in the axial direction.

[0172] It is worth noting that the embodiments of this application do not limit the cross-sectional shape of the protrusion and the groove; the cross-section of the protrusion and the groove can be as follows: Figure 10a The image shown is a square, but it can also be like... Figure 10b The shape shown is circular, but it can also be other shapes; this application does not limit this.

[0173] Alternatively, the connector 3100 and the cover ring 3200 can be fixed in a direction perpendicular to the rotation axis of the first thread 3110 by screws, bolts, etc., thereby restricting the rotation of the connector 3100 relative to the cover ring 3200.

[0174] In this embodiment, the first thread 3110 can also have various forms. The first thread 3110 on the connector 3100 only needs to mate with the second thread on the machine body; this embodiment does not limit the forms of the first thread 3110 and the second thread. Optionally, it can be as follows... Figures 3 to 10b As shown, the first thread 3110 is an external thread, and the second thread is an internal thread; it can also be as follows: Figure 11 As shown, the first thread 3110 is an external thread and the second thread is an internal thread, but this application does not limit this.

[0175] Optionally, in this embodiment, a first circular hole may be formed on the camera body, and a first cylinder may be formed on the lens. The first cylinder is coaxial with the first thread 3110, meaning the first cylinder is coaxial with the optical axis of the lens. The first cylinder is also coaxial with the second thread, meaning the first cylinder is coaxial with the optical axis of the camera body. The first cylinder is used to mate with the first circular hole.

[0176] In this embodiment, the fitting gap between the first cylinder and the first circular hole can be used as the key tolerance (the coaxiality between the lens optical axis and the camera body optical axis). By improving the accuracy of the fitting gap, the coaxiality between the lens optical axis and the camera body optical axis can be improved, thereby improving the clarity of the display or image acquisition.

[0177] It is worth noting that, in the embodiments of this application, the coaxiality between the devices (e.g., the coaxiality between the first cylinder and the first circular hole mentioned above) is an ideal state. If there is a certain deviation between the axes of the devices due to processing, assembly, etc., it also falls within the protection scope of the embodiments of this application.

[0178] In this embodiment, the high coaxiality between the optical axis of the lens and the optical axis of the camera body is ensured by the cooperation between the first cylinder on the lens and the first circular hole on the camera body, thus ensuring higher clarity in display or image acquisition.

[0179] In this embodiment, the first cylinder is used to ensure high coaxiality between the optical axis of the lens and the optical axis of the camera body. Coaxiality can be ensured as long as it can mate with the bore axis of the camera body; therefore, besides the shape of a cylinder, coaxiality can also be ensured through the shape of a circular hole. For example... Figure 11 As shown, the second circular hole on the lens can also be used to mate with the second cylinder on the camera body. The second circular hole is coaxial with the rotation axis of the first thread 3110, that is, coaxial with the optical axis of the lens; the second cylinder is coaxial with the second thread, that is, coaxial with the optical axis of the camera body. By mates the second circular hole on the lens with the second cylinder on the camera body, a high degree of coaxiality between the lens and the camera body can be achieved.

[0180] It is worth noting that the various forms of the first connecting surface 3220, notch 3221, first connecting module 3120 and second connecting module 3210, first thread 3110 and first cylinder 3130 can be combined in the same lens fixing device 3000, and this application does not limit this.

[0181] This application embodiment also provides a lens fixing device that integrates the locking function of the aforementioned cover ring 3200 to the camera body onto the connector 3100. This structure fixes the axial position by restricting radial rotation, ensuring a constant distance between the lens and the camera body. Figure 12 As shown, the lens fixing device 3000 includes a connector 1200. The connector 1200 is on the lens and includes a first thread 1210 and a connecting platform 1220. The first thread 1210 is used to connect with a second thread on the camera body. The first connecting surface of the connecting platform 1220 is used to restrict the rotation of the lens along the rotation axis of the second thread. Optionally, a plurality of notches 1221 may be provided on the first connecting surface to restrict the rotation of the lens along the rotation axis of the second thread.

[0182] For a detailed description of the first thread 1210, please refer to [link / reference needed]. Figures 3 to 11 The first thread 3110 of the illustrated embodiment; see the detailed description of the first connecting surface. Figures 3 to 11 The embodiment shown; see the detailed description of the first connecting surface and the plurality of notches 1221. Figures 3 to 11 The first connecting surface 3220 and notch 3221 of the embodiment shown; see the detailed description of the first cylinder. Figures 3 to 11 The first cylinder or first circular hole in the illustrated embodiment will not be described again here.

[0183] The lens may include lens elements and a lens barrel. A connector may be located on the lens barrel for connecting the lens to the camera body. Optionally, the first thread, multiple notches, etc., of the connector may be machined on the lens barrel by cutting or other processes, or may be fixed to the lens barrel by adhesive, mounting, or other methods; this application does not limit this.

[0184] Optionally, during the assembly process of the lens (connector 1200) and the body, washers, springs, etc. can be spaced between the multiple notches 1221 and the body to lock the multiple notches 1221 and the connection holes on the body, thereby restricting the rotation of the lens (connector 1200) along the rotation axis of the second thread on the body.

[0185] In this embodiment, multiple notches 1221 restrict the rotation of the lens (connector 1200) along the rotation axis of the second thread. Since the connector 1200 is connected to the camera body via threads (first thread 1210 and second thread), restricting the rotation of the connector 1200 along the rotation axis of the second thread limits its axial displacement. Both rotation and displacement between the lens (connector 1200) and the camera body are restricted, thus limiting the movement of the lens relative to the camera body (movement includes translation and rotation), fixing the lens's position relative to the camera body. Because the multiple notches 1221 can restrict the rotation of the connector 1200 through relatively stable connection methods such as threads or welding, these connection methods have high reliability under vibration conditions. Therefore, in motion scenarios, the reliability of the lens position can be improved, thereby improving the clarity of the display or image.

[0186] Optionally, the connector 1200 may not include multiple notches 1221. The connector 1200 can limit the radial rotation of the lens (connector 1200) relative to the camera body by means of the first connecting surface on the first connecting platform 1220 (e.g., by welding, gluing, etc.). This application does not limit this.

[0187] The lens fixing device provided in this application embodiment can be applied to devices such as acquisition devices, display devices, and communication devices including optical fiber.

[0188] This application embodiment also provides an optical instrument, which includes a lens and a body, the lens passing through... Figures 3 to 12 The lens fixing device 3000 or connector 1200 described in any of the embodiments is fixed to the camera body.

[0189] Optionally, the housing may also include the second thread described in the first or second aspect to enable connection with the first thread on the connector.

[0190] Optionally, the body may also include connection holes. The connection holes are used to lock with multiple notches on the first or second side via fasteners.

[0191] Optionally, the camera body may also include a first circular hole coaxial with the second thread. The lens also includes a first cylinder coaxial with the first thread, the first cylinder being used to mate with the first circular hole on the camera body.

[0192] It is worth noting that, in the embodiments of this application, the coaxiality between devices is an ideal state. If there is a certain deviation between the optical axes due to processing, assembly, etc., it also falls within the protection scope of the embodiments of this application.

[0193] Optionally, the camera body may also include a second cylinder coaxial with the second thread. The lens also includes a second circular hole coaxial with the first thread, the second circular hole being used to mate with the second cylinder on the camera body.

[0194] Optionally, the optical instrument can be a data acquisition device, the body of which includes a data acquisition module. The lens fixing device 3000 or the connector 1200 is used to fix the distance between the lens and the data acquisition module.

[0195] For example, the acquisition device may be a telescope, a (remote sensing) sight, etc., and this application does not limit it.

[0196] Optionally, the acquisition device can be a fixed-focus acquisition device. If it is a fixed-focus acquisition device, then the lens in the lens fixing device is a fixed-focus lens.

[0197] Optionally, the acquisition module in the acquisition device may include a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), etc., and this application does not limit it.

[0198] Optionally, the optical instrument can be a display device, the body of which includes an image source module. The lens fixing device 3000 or the connector 1200 is used to fix the distance between the lens and the image source module.

[0199] Optionally, the display device can be a fixed-focus display device. If it is a fixed-focus display device, then the lens in the lens fixing device is a fixed-focus lens.

[0200] Optionally, embodiments of this application also provide a vehicle, the vehicle equipment including the aforementioned display device, which is installed on the vehicle. Optionally, the display device may be vehicle lights, a head-up display (HUD), etc., and this application does not limit it to this.

[0201] In one alternative implementation, the lens includes a lens barrel and lens elements, and the vehicle also includes a reflective element. The lens elements are used to project light from the image source module onto the reflective element, which in turn reflects the light.

[0202] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0203] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0204] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0205] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0206] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A lens fixing device, characterized in that, include: A connector located on the lens, the connector including a first thread and a first connection module, the first thread being used to connect with a second thread on the camera body; The cover ring includes a second connecting module and a first connecting surface; the second connecting module is used to cooperate with the first connecting module to restrict the rotation of the lens relative to the cover ring, and the first connecting surface is used to restrict the rotation of the cover ring relative to the camera body.

2. The apparatus according to claim 1, characterized in that, The first connecting surface has multiple notches, which are locked to the connecting holes on the body by fasteners to restrict the rotation of the cover ring relative to the body.

3. The apparatus according to claim 2, characterized in that, The number of the plurality of notches is m, and n of the m notches are used to lock with n connecting holes on the body through the fastener, where m≥n.

4. The apparatus according to claim 2, characterized in that, The number of the plurality of notches is m, and the m notches are used to lock the fastener with m of the n connecting holes on the body, where m≤n.

5. The apparatus according to claim 1, characterized in that, The first connecting surface has multiple notches, which are used to engage with protrusions on the body to restrict the rotation of the cover ring relative to the body.

6. The apparatus according to claim 1, characterized in that, The first connecting surface includes a plurality of protrusions for engaging with connecting holes on the body to restrict the cover ring from rotating relative to the body.

7. The apparatus according to any one of claims 2 to 5, characterized in that, If the positional tolerance of the lens along the rotation axis of the second thread is δ, then the pitch l of the first thread, the distance D between any of the plurality of notches and the rotation axis of the second thread, and the maximum distance d between adjacent notches among the plurality of notches conform to the following correspondence: 。 8. The apparatus according to any one of claims 1 to 7, characterized in that, The first connection module includes a first groove; The second connection module includes a first protrusion; The first groove is used to engage with the first protrusion to restrict the rotation of the lens relative to the cover ring.

9. The apparatus according to any one of claims 1 to 7, characterized in that, The first connection module includes a second protrusion; The second connection module includes a second groove; The second protrusion is used to engage with the second groove to restrict the rotation of the lens relative to the cover ring.

10. An optical instrument, characterized in that, It includes a lens and a camera body, wherein the lens is fixed to the camera body by a lens fixing device according to any one of claims 1 to 9.

11. The optical instrument according to claim 10, characterized in that, The fuselage includes the second thread.

12. The optical instrument according to claim 10 or 11, characterized in that, The body also includes a first circular hole coaxial with the second thread; The lens includes a first cylinder coaxial with the first thread, the first cylinder being used to mate with the first circular hole.

13. The optical instrument according to claim 10 or 11, characterized in that, The machine body also includes a second cylinder coaxial with the second thread; The lens includes a second circular hole coaxial with the first thread, the second circular hole being used to mate with the second cylinder.

14. The optical instrument according to any one of claims 10 to 13, characterized in that, The optical instrument is a data acquisition device, and the body includes a data acquisition module; The lens fixing device is used to fix the distance between the lens and the acquisition module.

15. The optical instrument according to any one of claims 10 to 13, characterized in that, The optical instrument is a display device, and the body includes an image source module; The lens fixing device is used to fix the distance between the lens and the image source module.

16. A means of transportation, characterized in that, The display device of claim 15 is included, wherein the display device is installed on the vehicle.

17. The means of transport according to claim 16, characterized in that, The lens includes a lens barrel and a lens element, and the vehicle also includes a reflective element; The lens is used to project light from the image source module onto the reflective element; The reflective element is used to reflect the light.

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