Lens assembly, lens and image pickup device

Abstract

This application discloses a lens assembly, a lens, and an image pickup device. The lens assembly includes a frame and a lens group. The frame has an annular support formed around its inner wall, and multiple elastic elements are disposed on the annular support. Several protrusions are formed on the inner wall of the frame, each protrusion having a positioning rotation groove. The lens group includes a lens frame and a lens disposed thereon. Positioning bosses corresponding to the positioning rotation grooves are formed on the periphery of the lens frame. The lens group is assembled into the frame through the lens frame, the positioning bosses are engaged in the positioning rotation grooves, the lens frame presses against the elastic elements, and under the action of the elastic elements, a floating gap is formed between the lens frame and the annular support for axial floating. According to this application's technical solution, when the lens group is subjected to axial impact, the elastic elements can absorb energy through deformation, reducing the impact force directly transmitted to the lens and improving its impact resistance.

Description

Technical Field

[0001] This application relates to the field of photography technology, and in particular to a lens assembly, lens, and image pickup device. Background Technology

[0002] Photographic lenses are mostly used in outdoor scenes. In traditional lenses, the first lens element (front lens) is directly exposed and is rigidly mounted. However, during use, the lens is susceptible to impacts, which can cause the lens element to break or scratch, thus affecting image quality.

[0003] Traditional solutions improve the impact resistance of lenses by adding reinforcement or buffer structures (such as rubber rings or elastic arms) around the lens edge. However, these solutions do not solve the problem of the inherent brittleness of glass lenses and thus have poor impact resistance.

[0004] Therefore, how to improve the impact resistance of the front lens is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This application provides a lens assembly, a lens, and an image pickup device, aiming to solve the problem of poor impact resistance of the front lens element in existing lenses.

[0006] To achieve the above objectives, this application proposes a lens assembly. The lens assembly includes:

[0007] The skeleton has an annular support formed around its inner wall, and multiple elastic elements are provided on the annular support. The inner wall of the skeleton protrudes towards its center to form several protrusions, and each of the protrusions is provided with a positioning rotation groove.

[0008] The lens assembly includes a lens frame and a lens disposed on the lens frame, wherein a positioning boss corresponding to the positioning rotation groove is formed on the periphery of the lens frame.

[0009] The lens assembly is inserted into the frame via the lens group frame, the positioning boss is engaged in the positioning rotation groove, the lens group frame presses against the elastic member, and under the action of the elastic member, a floating gap is formed between the lens group frame and the annular frame support for axial floating.

[0010] In some embodiments, the number of elastic elements is three, and the lines connecting the three elastic elements and the central axis of the annular bracket form an angle of 120° with each other.

[0011] In some embodiments, the elastic element includes a telescopic spring, a rubber ring, and a spring sheet.

[0012] In some embodiments, the elastic element is a telescopic spring, and a mounting post is provided on the annular bracket, with the telescopic spring sleeved on the mounting post.

[0013] In some embodiments, the positioning rotary groove includes an inlet end for the positioning boss to rotate into, and at the inlet end, one side of the groove wall near the annular bracket extends relative to the other side of the groove wall.

[0014] In some embodiments, a core-aligning assembly is provided between the lens group frame and the skeleton, the core-aligning assembly being used to adjust the radial position of the lens group on the skeleton.

[0015] In some embodiments, the core-aligning assembly includes:

[0016] The positioning component includes a positioning post, a first positioning hole provided on the skeleton, and a second positioning hole provided on the lens group frame; the first positioning hole and the second positioning hole are aligned, and one end of the positioning post passes through the second positioning hole and is fixedly connected to the first positioning hole; the second positioning hole is an oblong hole.

[0017] The adjustment assembly includes an adjustment member, a insertion hole on the lens frame, and an adjustment hole extending through the frame along the optical axis. The adjustment member is disposed in the adjustment hole, with one end inserted into the insertion hole, so that when the adjustment member is adjusted in the adjustment hole, it can move the lens frame around the positioning post by pressing against the insertion hole.

[0018] In some embodiments, the adjusting member is an eccentric screw, which includes a screw head and a rod body connected to the screw head. The screw head is located in the adjusting hole, and the rod body is inserted into the insertion hole.

[0019] This application also provides a lens, which includes the lens assembly described above.

[0020] This application also provides an image pickup device, which includes an image sensor and a lens as described above, the image sensor being configured to receive an image formed by the lens.

[0021] This application proposes a lens assembly. The lens assembly includes a frame and a lens group: the frame has an annular support formed around its inner wall, and multiple elastic elements are disposed on the annular support; the inner wall of the frame also has several protrusions extending towards its center, each protrusion having a positioning rotation groove; the lens group includes a lens frame and lenses disposed on the lens frame, with positioning bosses corresponding to the positioning rotation grooves formed on the periphery of the lens frame; the lens group is assembled into the frame via the lens frame, the positioning bosses are engaged in the positioning rotation grooves, the lens frame presses against the elastic elements, and under the action of the elastic elements, a floating gap is formed between the lens frame and the annular support for axial floating. Based on the above structural design, when the lens group is subjected to axial impact, the elastic elements can absorb energy through deformation, reducing the impact force directly transmitted to the lenses, thus significantly improving impact resistance. This application also proposes a lens and an image pickup device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the exploded structure of a lens assembly according to an embodiment of this application. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the assembly structure of a lens assembly according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the exploded structure of a lens assembly according to an embodiment of this application. Figure 2 ;

[0026] Wherein: 100-Lens assembly; 10-Frame; 11-Ring bracket; 12-Elastic element; 121-Mounting post; 13-Protrusion; 131-Positioning rotation groove; 20-Lens group; 21-Lens group frame; 211-Positioning boss; 22-Lens; 30-Positioning component; 31-Positioning post; 32-First positioning hole; 33-Second positioning hole; 40-Adjustment component; 41-Adjustment element; 42-Adjustment hole; 43-Interlocking hole. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that, unless otherwise stated or limited, all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] It should also be noted that, unless otherwise stated or limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be an intervening element present. When an element is referred to as "connected to" another element, it may be directly connected to the other element or there may be an intervening element present.

[0030] Furthermore, unless otherwise stated or limited, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0031] See Figure 1 As shown, this application proposes a lens assembly 100. The lens assembly 100 includes a frame 10 and a lens group 20; the frame 10 has an annular support 11 formed around its inner wall, and a plurality of elastic members 12 are provided on the annular support 11, and a plurality of protrusions 13 are formed on the inner wall of the frame 10 protruding towards its center, each protrusion 13 having a positioning rotation groove 131; the lens group 20 includes a lens frame 21 and a lens 22 disposed on the lens frame 21, and a positioning boss 211 corresponding to the positioning rotation groove 131 is formed on the periphery of the lens frame 21.

[0032] In this application's technical solution, the frame 10 is a cylindrical structure with both ends extending through it, providing support and protection for the lens components housed within it. The lens components include an annular support 11, which provides a supporting plane to fix the elastic element 12. Several protrusions 13 are located on the side of the annular support 11 where the elastic element 12 is located (the object side of the lens system). These protrusions 13 are formed by protruding from the inner wall of the frame 10 towards the center, and a positioning rotation groove 131 is formed along the circumference of the frame 10 on the side of the protrusions 13 facing the central axis. This facilitates the assembly of the lens group frame 21 and the rotational engagement between the positioning protrusions 211 and the positioning rotation groove 131 on its periphery. The assembly process of a lens group 20 is as follows:

[0033] The lens assembly 20 is pressed into the frame 10 from the object side. During this process, the lens group frame 21 in the lens assembly 20 will press against the elastic member 12 until the positioning bosses 211 on the periphery of the lens group frame 21 are aligned with the positioning rotary groove 131 on the side. Then, the lens group frame 21 is rotated so that each positioning boss 211 rotates and is locked into the positioning rotary groove 131 one by one. After the force of insertion of the lens assembly 20 is removed, the lens group frame 21 will return a short distance under the elastic force of the elastic member 12 until the positioning bosses 211 are pressed against the side wall of the positioning rotary groove 131 away from the annular support 11.

[0034] Understandably, the design thickness of the positioning boss 211 should be less than the distance between the two side walls of the positioning rotary groove 131, so that the positioning boss 211 can overcome the elastic force of the elastic element 12 and float axially between the two side walls; and after the front lens group 20 is assembled, a floating gap is formed between the lens group frame 21 and the annular support 11 to avoid the axial floating of the lens group frame 21 (specifically, the displacement towards the image side of the lens system).

[0035] Thus, when the lens assembly 100 provided by this application is subjected to axial impact, the elastic element 12 can absorb energy through deformation, reducing the impact force directly transmitted to the front lens 22, thereby significantly improving the impact resistance performance.

[0036] In some embodiments, the number of elastic elements 12 is three, and the line connecting the three elastic elements 12 and the central axis of the annular support 11 forms a 120° angle with each other.

[0037] In this embodiment, three elastic elements 12 are evenly distributed to enhance support stability. When the lens frame 21 is compressed, the elastic elements 12 deform synchronously, dispersing the pressure and further improving impact resistance. The use of three elastic elements 12 is merely an example; in practical applications, the number can be adjusted according to specific needs, such as four, five, six, or more, to adapt to the structural requirements and operating environments of different lens systems, ensuring effective impact resistance under various conditions. The elastic elements 12 include telescopic springs, rubber rings, and spring sheets, offering a variety of options and allowing for flexible configuration based on specific requirements.

[0038] Furthermore, when the elastic element 12 is a telescopic spring, a mounting post 121 is provided on the annular bracket 11. The telescopic spring is sleeved on the mounting post 121, so the mounting post 121 can serve as a guide shaft for the telescopic spring, preventing radial displacement or twisting when the spring is compressed. Moreover, the free end of the mounting post 121 does not exceed the position of the positioning rotary groove 131 near the side wall of the annular bracket 11, thus avoiding the axial floating of the positioning boss 211 due to the excessive length of the mounting post 121, ensuring coordinated operation between the components.

[0039] In some embodiments, the positioning rotary groove 131 includes an inlet end for the positioning boss 211 to rotate into, and at the inlet end, one side of the groove wall near the annular support 11 extends outward relative to the other side of the groove wall. Thus, during the downward assembly of the lens assembly 20, the positioning boss 211 is limited by the groove wall near the annular support 11. At this time, the positioning boss 211 is directly opposite the inlet end of the positioning rotary groove 131, and after rotation, the positioning boss 211 can smoothly rotate into the positioning rotary groove 131. This quickly positions the lens assembly 20 during its assembly stroke, improving assembly efficiency.

[0040] In addition, to improve the optical imaging effect of the system, a centering assembly is also provided in the lens assembly 100. For example... Figure 2 As shown, the outer diameter of the lens assembly 20 is smaller than the inner diameter of the frame 10, so that when the lens assembly 20 and the frame 10 are coaxially arranged, there is an adjustment gap D between the lens group frame 21 and the frame 10. The core-aligning assembly is used to adjust the radial position of the lens assembly 20 on the frame 10 within the adjustment range of the adjustment gap D.

[0041] In a further detailed description, the core-aligning assembly comprises two parts: a positioning component 30 and an adjustment component 40, which together enable the core-aligning operation.

[0042] See Figure 3As shown, the positioning assembly 30 includes a positioning post 31, a first positioning hole 32 disposed on the frame 10, and a second positioning hole 33 disposed on the lens assembly 21. When the lens assembly 20 is assembled, the first positioning hole 32 and the second positioning hole 33 are aligned, allowing one end of the positioning post 31 to pass through the second positioning hole 33 and be fixedly connected to the first positioning hole 32. The second positioning hole 33 is a through-hole; the positioning post 31 is inserted sequentially from the object side into the second positioning hole 33 and the first positioning hole 32 and fixed within the first positioning hole 32. Notably, the lens assembly 21 is movably assembled with the positioning post 31 through the second positioning hole 33, allowing the lens assembly 21 to rotate around the positioning post 31. Specifically, the second positioning hole 33 is designed as an oblong hole, with the diameter of the positioning post 31 matching the width of the oblong hole. This shape design further allows for fine-tuning of the lens assembly 21 relative to the positioning post 31 within a certain range (within the length of the oblong hole). In some other embodiments, the second positioning hole 33 may also be a rectangular hole.

[0043] The adjustment assembly 40 includes an adjustment member 41, a insertion hole 43 on the lens group frame 21, and an adjustment hole 42 extending through the frame 10 along the optical axis. The adjustment member 41 is disposed within the adjustment hole 42, with one end inserted into the insertion hole 43. Understandably, after one end of the adjustment member 41 is inserted into the insertion hole 43, there is a floating gap between its end and the bottom of the insertion hole 43 to allow for axial displacement of the lens group frame 21. That is, one end of the adjustment member 41 is not fully inserted into the insertion hole 43. This fit is designed to ensure close contact with the inner wall of the insertion hole 43, so that when the adjustment member 41 is adjusted within the adjustment hole 42, the lens group frame 21 is finely positioned around the positioning post 31 by pressing against the insertion hole 43. Similarly, when the lens group 20 is assembled, the adjustment hole 42 and the insertion hole 43 are aligned to facilitate insertion of the adjustment member 41 from the image side of the lens system and to ensure that adjustment operations can be performed within the adjustment hole 42. Finally, after the position of the lens group frame 21 is adjusted, the adjusting component 41 is fixed in the adjusting hole 42 by using a fixing material such as glue, so as to ensure that the radial position of the lens group 20 in the frame 10 is stable and fixed.

[0044] Furthermore, the adjusting component 41 is an eccentric screw, which includes a screw head and a rod connected to the screw head. The central axes of the screw head and the rod are not on the same straight line. The screw head is located in the adjusting hole 42, and the rod is inserted into the insertion hole 43. Furthermore, by fine-tuning the screw head (rotating the screw head), the rod can be moved within a large radial range. Based on the tight fit between the rod and the insertion hole 43, it presses against and drives the lens frame 21 to make fine adjustments to its position around the positioning post 31.

[0045] The adjustment hole 42 can also be a waist-shaped hole, further increasing the position adjustment range of the lens frame 21. And the adjustment assembly 40 can be provided in multiple sets, such as... Figure 2 The two sets shown work together to achieve more precise position adjustment.

[0046] In summary, the lens assembly 100 provided by this application can, on the one hand, achieve precise alignment through the alignment assembly after the lens group 20 is assembled into the frame 10, ensuring the optical performance of the lens; on the other hand, after the alignment is completed and the radial position of the lens group 20 is fixed, the lens assembly 100 can provide good axial impact resistance for the lens group 20 based on the structural design of the elastic element 12, the positioning rotation groove 131 and the positioning boss 211.

[0047] This application also provides a lens, which includes the lens assembly 100 as described above. The lens adopts all the technical solutions of all embodiments of the lens assembly 100 described above, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0048] This application also provides an image pickup device, which includes an image sensor and the lens described above, wherein the image sensor and the lens are detachably connected. In this embodiment, the image pickup device adopts all the technical solutions of all the above-described lens embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0049] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A lens assembly, characterized in that, include: The skeleton has an annular support formed around its inner wall, and multiple elastic elements are provided on the annular support. The inner wall of the skeleton protrudes towards its center to form several protrusions, and each of the protrusions is provided with a positioning rotation groove. The lens assembly includes a lens frame and a lens disposed on the lens frame, wherein a positioning boss corresponding to the positioning rotation groove is formed on the periphery of the lens frame. The lens assembly is inserted into the frame via the lens group frame, the positioning boss is engaged in the positioning rotation groove, the lens group frame presses against the elastic member, and under the action of the elastic member, a floating gap is formed between the lens group frame and the annular frame support for axial floating.

2. The lens assembly according to claim 1, characterized in that, The number of elastic elements is three, and the lines connecting the three elastic elements and the central axis of the annular frame support form an angle of 120° with each other.

3. The lens assembly according to claim 2, characterized in that, The elastic element includes a telescopic spring, a rubber ring, and a spring sheet.

4. The lens assembly according to claim 3, characterized in that, The elastic element is a telescopic spring, and a mounting post is provided on the annular bracket, with the telescopic spring sleeved on the mounting post.

5. The lens assembly according to any one of claims 1 to 4, characterized in that, The positioning rotary groove includes an inlet end for the positioning boss to rotate into, and at the inlet end, one side of the groove wall near the annular bracket extends out relative to the other side of the groove wall.

6. The lens assembly according to any one of claims 1 to 4, characterized in that, A core-aligning assembly is provided between the lens group frame and the skeleton, and the core-aligning assembly is used to adjust the radial position of the lens group on the skeleton.

7. The lens assembly according to claim 6, characterized in that, The core-aligning assembly includes: The positioning component includes a positioning post, a first positioning hole provided on the skeleton, and a second positioning hole provided on the lens group frame; the first positioning hole and the second positioning hole are aligned, and one end of the positioning post passes through the second positioning hole and is fixedly connected to the first positioning hole; the second positioning hole is an oblong hole. The adjustment assembly includes an adjustment member, a insertion hole on the lens frame, and an adjustment hole extending through the frame along the optical axis. The adjustment member is disposed in the adjustment hole, with one end inserted into the insertion hole, so that when the adjustment member is adjusted in the adjustment hole, it can move the lens frame around the positioning post by pressing against the insertion hole.

8. The lens assembly according to claim 7, characterized in that, The adjusting component is an eccentric screw, which includes a screw head and a rod body connected to the screw head. The screw head is located in the adjusting hole, and the rod body is inserted into the insertion hole.

9. A lens, characterized in that, The lens includes the lens assembly as described in any one of claims 1-8.

10. An image acquisition device, characterized in that, It includes an image sensor and a lens as described in claim 9, wherein the image sensor is configured to receive an image formed by the lens.

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