A secondary mirror flipping structure and eyeglasses having the flipping structure

Abstract

This invention provides a secondary mirror flipping structure and eyeglasses with the flipping structure, including an attachment rod, a flipping sleeve, a frame rod, and an elastic support structure. The attachment rod is integrally fixed or detachably mounted on the frame; the flipping sleeve is detachably fixed to the attachment rod, and the flipping sleeve and the attachment rod enclose a flipping groove; the elastic support structure has an elastic protrusion; the frame rod is elastically pressed against the inner wall of the flipping groove through the elastic protrusion of the elastic support structure. This invention's flipping structure replaces the traditional complex hinge connection scheme, which not only reduces the precision requirements of parts processing but also reduces the difficulty of surface treatment processes such as electroplating, adapting to the needs of large-scale production, effectively improving production efficiency while significantly reducing manufacturing costs. At the same time, the elastic support structure can accommodate slight errors during assembly, eliminating the need for precise alignment of the pivot like traditional hinges, completely saving tedious and time-consuming precise alignment steps, and significantly shortening assembly time.

Description

Technical Field

[0001] This utility model relates to the technical field of eyeglasses, and in particular to a secondary mirror flipping structure and eyeglasses having the flipping structure. Background Technology

[0002] As a commonly used vision correction and light-blocking tool, eyeglasses are increasingly widely used. The basic structure of existing eyeglasses typically includes a frame and temples. The frame supports the lenses, while the temples are symmetrically positioned on both sides of the frame and are secured by hooks around the wearer's ears.

[0003] With the increasing popularity of eyeglasses, users' functional requirements are no longer limited to basic reliability and aesthetics; they increasingly prefer multi-functional integration or switching capabilities. To meet this demand, related technologies typically employ the addition of secondary lenses to expand the functionality of existing eyeglasses. For example, functional secondary lenses such as reading glasses or sunglasses can be added to basic eyeglasses, or optical lenses can be mounted on lensless frames, thereby enabling the addition or switching of functions to adapt to diverse usage needs.

[0004] Existing connection methods between secondary lenses and frames mainly include magnetic, snap-on, and flip-type connections. Among these, the flip-type connection structure has become the mainstream application solution due to its advantages of strong connection stability and simple operation.

[0005] Currently, flip-type connection structures typically achieve the rotational connection between the secondary lens and the frame through specially designed hinges, but this structure still has the following technical drawbacks: 1. The addition of the hinge structure increases the overall structural complexity of the glasses, which not only increases the difficulty of processing and manufacturing the frame and secondary lens, but also puts forward higher requirements for surface treatment processes such as electroplating, which is not conducive to optimizing production efficiency. 2. When installing a secondary mirror connected by a hinge, the hinge must be precisely aligned with the pivot to achieve the flipping function. The operation process is cumbersome and time-consuming, resulting in low installation efficiency.

[0006] In view of this, the inventor has specifically designed a secondary mirror flipping structure and eyeglasses having the flipping structure, which leads to this invention. Utility Model Content

[0007] To solve the above problems, the technical solution of this utility model is as follows: A secondary mirror flipping structure includes an attachment rod, a flipping bushing, a frame rod, and an elastic support structure, wherein: The attachment rod is integrally fixed or detachably mounted on the mirror frame to provide an installation reference. The flipping bushing is detachably fixed to the attachment rod, and the flipping bushing and the attachment rod enclose each other to form a flipping groove that passes through both sides. The elastic support structure has an elastic protrusion that can elastically stretch and deform. The skeleton rod is elastically pressed against the inner wall of the flip groove by the elastic protrusion of the elastic support structure, which is used to drive the secondary mirror to flip around the flip groove.

[0008] Preferably, the elastic support structure is an independent spring sheet, which is clamped between the outer surface of the attachment rod and the skeleton rod or between the skeleton rod and the inner side wall of the flip sleeve away from the attachment rod.

[0009] Preferably, the spring sheet has a first positioning structure at both ends along its length, and the attachment rod has a second positioning structure that cooperates with the first positioning structure for limiting.

[0010] Preferably, the top of the skeleton rod is recessed with a positioning groove adapted to the elastic protrusion to restrict its movement along the direction of the openings on both sides of the flip groove when the elastic protrusion is inserted.

[0011] Preferably, the height of the spring piece is adapted to the height of the flipping groove.

[0012] Preferably, the elastic support structure is integrally formed on the skeleton rod.

[0013] Preferably, the cross-sections of the attachment rod and the frame rod are both square.

[0014] Preferably, the flip bushing and the attachment rod are connected by one of the following methods: snap-fit ​​connection, riveting fixation, or welding.

[0015] Preferably, the elastic protrusion has a support surface that fits against the inner wall of the flip groove.

[0016] This utility model also provides the following solution: A pair of eyeglasses includes a frame, a secondary lens, and a secondary lens flipping structure, wherein the secondary lens is rotatably attached to the frame via the secondary lens flipping structure.

[0017] The beneficial effects of this utility model are as follows: This utility model replaces the traditional complex hinge connection scheme with a modular combination of attachment rod, flip bushing, skeleton rod and elastic support structure. It not only reduces the requirements for the precision of parts processing, but also reduces the difficulty of surface treatment processes such as electroplating. It is suitable for the needs of large-scale production, effectively improves production efficiency and significantly reduces manufacturing costs.

[0018] Meanwhile, the elastic protrusions of the elastic support structure have a certain amount of flexibility to accommodate slight errors during assembly, eliminating the need for precise alignment of the pivot like traditional hinges. During actual installation, simply riveting the flip-up bushing to the frame attachment rod and inserting the frame rod into the flip-up slot, allowing the spring clip to be inserted into place, completes the assembly. This completely eliminates the tedious and time-consuming precise alignment steps, significantly reducing assembly time.

[0019] In addition, the elastic pre-tightening force of the elastic protrusion and the inner wall of the flipping groove can prevent the skeleton rod from loosening or shaking when flipping; together with the limiting effect of the skeleton rod positioning groove on the elastic protrusion, it can effectively limit the displacement of the secondary mirror. The double protection makes the secondary mirror flipping smooth and stable, improving the safety of use and the reliability of the structure.

[0020] In summary, the installation process of this structure is simple and efficient, requiring only three steps: first, riveting the flip sleeve onto the attachment rod in the middle of the mirror frame; second, simultaneously fitting the frame rod into the flip groove formed by the attachment rod and the flip sleeve; and third, inserting the spring piece into place along one side of the flip groove. Meanwhile, the elastic protrusion of the elastic support structure has a margin for expansion and contraction, accommodating minor assembly errors and eliminating the need for precise alignment like traditional hinges. This design is not only more user-friendly for manufacturing and surface treatment processes such as electroplating, but also completely eliminates the tedious and time-consuming installation steps, significantly improving production and assembly efficiency. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0022] in: Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the secondary mirror in a 90° flipped state in Embodiment 1 of this utility model; Figure 3 This is an exploded structural diagram of Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of the flip-up bushing in Embodiment 1 of this utility model; Figure 5 This is a three-dimensional structural diagram of the independent spring piece in Embodiment 1 of this utility model; Figure 6 This is a partial cross-sectional view of the secondary mirror in the unflipped state in Embodiment 1 of this utility model; Figure 7 This is a partial cross-sectional view of the secondary mirror in the 90° flipped state in Embodiment 1 of this utility model; Figure 8 This is a partial cross-sectional view of the secondary mirror in the 180° flipped state in Embodiment 1 of this utility model; Figure 9 This is a schematic diagram of the flipping state change of the secondary mirror in Embodiment 1 of this utility model; Figure 10 This is a partial cross-sectional view of the structure of Embodiment 1 of this utility model, highlighting the changing state of the spring clip; Figure 11 This is a partial structural diagram of the secondary mirror and spring in Embodiment 2 of this utility model; Figure 12 This is a partial cross-sectional view of the spring sheet and positioning groove in Embodiment 2 of this utility model; Figure 13 This is a partial structural diagram highlighting the first positioning structure and the second positioning structure in Embodiment 3 of this utility model; Figure 14 This is a partial cross-sectional view of Embodiment 3 of the present invention, highlighting the first positioning structure and the second positioning structure; Figure 15 This is an exploded structural diagram of Embodiment 4 of this utility model; Figure 16 This is a schematic diagram of the overall structure assembly of Embodiment 4 of this utility model; Figure 17 This is a partial cross-sectional view of the integrated elastic support structure in Embodiment 4 of this utility model.

[0023] Label Explanation: 100. Attachment rod; 110. Positioning block; 120. Positioning hole; 200. Flip sleeve; 210. Riveting fixing hole; 220. Flip groove; 300. Frame rod; 310. Positioning groove; 320. Guide surface; 400. Elastic support structure; 410. Spring piece; 411. Horizontal section; 412. Protruding section; 413. Connecting section; 414. Support surface; 415. First positioning structure; 500. Frame; 510. Nose bridge; 600. Secondary lens. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Example 1

[0025] Please see Figures 1 to 10 This is a preferred embodiment of the secondary mirror flipping structure, comprising an attachment rod 100, a flipping bushing 200, a frame rod 300, and an elastic support structure 400, as detailed below: like Figure 2 , 3As shown, in this embodiment, the attachment rod 100 is a long rod with a square cross-section. In this embodiment, it is integrally fixed to the middle of the frame 500 as the core central support. The positions of the frame 500 on both sides of the attachment rod 100 serve as lens mounting positions, and the two side edges of the frame 500 serve as mounting positions for the temples. The middle part of the frame 500, located on both sides of the attachment rod 100, also serves as the fixing position for the nose bridge 510. The entire attachment rod 100 serves as a reference to provide mounting positions for other accessories.

[0026] In addition, the attachment rod 100 can be fixed as an additional component or fixed to the middle of the frame 500 by welding, snap-fitting, riveting, etc. It can also be used as a reference for connecting and installing the secondary mirror 600. There are no restrictions here.

[0027] like Figure 3 , 4 As shown, the flip sleeve 200 is U-shaped and is formed by bending a square sheet along two parallel fold lines. In this embodiment, the upper and lower opposite sidewalls of the attachment rod 100 are respectively protruding with positioning blocks 110. The upper and lower sidewalls of the U-shaped opening of the flip sleeve 200 are respectively provided with riveting fixing holes 210 that are opposite to the positioning blocks 110 and of appropriate size (one on the upper side is located in the middle, and two on the lower side are symmetrically distributed). In this embodiment, the riveting fixing holes 210 of the flip sleeve 200 are riveted to the positioning blocks 110 by riveting fixing, thereby forming a straight flip groove 220 extending along the extension direction of the attachment rod 100 on the front side of the attachment rod 100 (i.e. the front side of the entire frame 500). At the same time, after being enclosed by the attachment rod 100, the cross-sectional shape of the entire flip groove 220 is square, and the two sides of the flip groove 220 are connected to the mounting positions of the two lenses.

[0028] The flip sleeve 200 is detachably fixed to the attachment rod 100, and the flip sleeve 200 and the attachment rod 100 form a flip groove 220 that runs through both sides, based on this: like Figure 3 , 5 As shown, in this embodiment, the elastic support structure 400 is an elastic sheet 410 made of an independent metal sheet (such as a stainless steel sheet), and the middle part of the elastic sheet 410 has an elastic protrusion that can be elastically stretched and deformed.

[0029] Specifically, in this embodiment, the spring sheet 410 includes a horizontally extending sheet-like horizontal segment 411 and a protruding segment 412 that protrudes to one side along the middle of the horizontal segment 411. The protruding segment 412 forms the aforementioned elastic protrusion. The protruding segment 412 and the horizontal segment 411 are connected by an inclined connecting segment 413, and the outer surface of the protruding segment 412 forms a flat support surface 414. When the protruding segment 412 is compressed, the entire spring sheet 410 is compressed and deformed to store energy. After the external force disappears, the protruding segment 412 returns to its original position, thereby interfering with the effect of elastic expansion and contraction deformation.

[0030] like Figure 3 , 6 As shown in Figure -10, the frame rod 300 is a long rod with a square cross-section, which is integrally fixed to the middle of the secondary mirror 600, serving as the central support for the secondary mirror 600. The secondary mirror 600 has corresponding functional lenses, such as reading glasses or sunglasses, fixed on both sides of the frame rod 300. Based on this, the frame rod 300 is placed into the flip groove 220 (when riveting the flip bushing 200, the frame rod 300 is first placed into the corresponding area of ​​the flip groove 220, and then the flip bushing 200 is riveted to achieve the effect of placing the frame rod 300 into the flip groove 220). At this time, the entire secondary mirror 600 can flip around the rotation axis formed between the frame rod 300 and the flip groove 220.

[0031] Furthermore, after the skeleton rod 300 is placed into the flipping groove 220, the sheet-like spring piece 410 is inserted from one side opening of the flipping groove 220, so that it passes through the flipping groove 220. In this embodiment, the spring piece 410 is sandwiched between the outer surface of the attachment rod 100 and the flipping shaft. The support surface 414 on the protruding section 412 of the spring piece 410 faces the skeleton rod 300. Thus, when the spring piece 410 is pushed into place, the support surface 414 elastically abuts against the inner wall of the skeleton rod 300. The entire spring piece 410 is in an elastic energy storage state, and the skeleton rod 300 is elastically pressed against the inner wall of the flipping groove 220 on the side away from the attachment rod 100.

[0032] like Figure 6-10 As shown, in the initial state, the secondary mirror 600 and the frame 500 are in an overlapping position. At this time, the spring 410 is in a compressed and energy-storing state, elastically pressing the frame rod 300 against the inner wall of the outer side of the flip groove 220. When the user does not need the function of the secondary mirror 600, the secondary mirror 600 can simply be flipped up. During the flipping process, the protruding section 412 of the spring 410 is further compressed, and its overall thickness is reduced from... Figure 10When 'a' in the equation shrinks to 'b', the spring 410 further stores energy. When the secondary mirror 600 flips to 90°, the other flat wall surface of the skeleton rod 300 (originally located on the lower side, but facing the front after flipping) faces the inner wall of the flip groove 220 on the outer side. Subsequently, the spring 410 loses its limit and pushes the skeleton rod 300 back against the inner wall of the flip groove 220 away from the attachment rod 100. After the flat wall surface of the skeleton rod 300 is in contact with the inner wall surface of the flip groove 220, a stable support is formed, so that the entire secondary mirror 600 is kept at an angle of 90°. Throughout the process, the elastic extension and contraction of the spring 410 serves as both the flipping damping during the flipping process of the secondary mirror 600 and the adaptive positioning.

[0033] Subsequently, the secondary mirror 600 continues to rotate upwards. During this rotation, the protruding section 412 of the spring 410 is further compressed, and its overall thickness is reduced from... Figure 10 As b continues to shrink, when the secondary mirror 600 flips to 180° of its initial position, the overall thickness of the spring 410 returns to c. At this point, thickness c = thickness a, and the secondary mirror 600 is held in a high position by the spring 410, thereby achieving the 90° and 180° flip positioning of the secondary mirror 600.

[0034] In addition, the clamping position of the spring piece 410 can be designed not only on the rear side of the skeleton rod 300, but also on the front, bottom and top sides of the skeleton rod 300. The support surface 414 of the protruding section 412 can also face away from the skeleton rod 300 (instead, the end face of the horizontal section 411 abuts against the skeleton rod 300), which can also achieve the above-mentioned elastic clamping, flipping damping and adaptive positioning effects. No restrictions are imposed here.

[0035] Specifically, in this embodiment, the height of the spring piece 410 is adapted to the height of the flip groove 220. Thus, after the spring piece 410 is inserted, both the upper and lower surfaces of the spring piece 410 are in contact with the inner wall of the flip groove 220, which prevents the spring piece 410 from shaking and prevents the spring piece 410 from being displaced during the flipping process of the secondary mirror 600, so that it remains stable during the flipping process of the secondary mirror 600.

[0036] Furthermore, in other forms of the spring piece 410, such as at the bottom or top of the skeleton rod 300, the extension height of the spring piece 410 is adapted to the width between the front and rear side walls of the flip groove 220, thereby achieving the aforementioned effect of maintaining stability.

[0037] In particular, in this embodiment, the sum of the thickness of the spring piece 410 under normal conditions and the thickness of the skeleton rod 300 should be greater than the width between the front and rear side walls of the flip groove 220, so that the spring piece 410 is always in a compressed elastic energy storage state after being inserted. Example 2

[0038] Please see Figures 11 to 12This is a secondary mirror flipping structure as an embodiment 2 of the present utility model. The difference from embodiment 1 is that the top of the skeleton rod 300 is provided with a positioning groove 310 adapted to the elastic protrusion so as to restrict its movement along the direction of the openings on both sides of the flipping groove 220 when the elastic protrusion is embedded.

[0039] Specifically, in this embodiment, inclined guide surfaces 320 adapted to the inclined shape of the connecting section 413 are also formed on both sides of the positioning groove 310, and an arc transition is formed between the guide surface 320 and the bottom surface of the positioning groove 310 and the outer wall of the skeleton rod 300.

[0040] Thus, through the positioning slot 310, when the secondary mirror 600 is flipped up to 90° (in conjunction with...) Figure 12 The protruding section 412 of the spring piece 410 is precisely embedded in the positioning groove 310. The positioning groove 310 can strengthen the limiting of the spring piece 410, prevent it from sliding laterally, and further enhance the stability of the spring piece 410. Example 3

[0041] Please see Figures 13 to 14 This is a secondary mirror flipping structure in Embodiment 3 of the present utility model. The difference from Embodiment 1 or Embodiment 2 is that the spring piece 410 has a first positioning structure 415 at both ends along its length direction, and the attachment rod 100 is provided with a second positioning structure that limits and cooperates with the first positioning structure 415.

[0042] In this embodiment, the first positioning structure 415 is a protruding structure, which can be formed by tapping the surface of the spring piece 410 to make it protrude to one side, or by welding or other means to fix it to the spring piece 410. In this embodiment, the protruding structure protrudes integrally along the surface of the spring piece 410 in the first way. The second positioning structure is a positioning hole 120 that fits into the first positioning structure 415. The positioning hole 120 is opened through the front and rear walls of the attachment rod 100 and is located near the openings on both sides of the flip groove 220. Thus, when the spring piece 410 is pushed into the flip groove 220, when the spring piece 410 is pushed into place, the protruding structure will correspondingly spring into the positioning hole 120, limiting the position of the spring piece 410 and keeping it stably in the flip groove 220, providing stable elastic support for the skeleton rod 300. Example 4

[0043] Please see Figures 15 to 17 This is a secondary mirror flipping structure as an embodiment 4 of the present utility model. The difference from embodiment 1 is that the elastic support structure 400 is integrally formed on the skeleton rod 300.

[0044] In this embodiment, the elastic support structure 400 applies pressure (such as stamping) to the skeleton rod 300, causing its middle part to protrude to one side (in this embodiment, it protrudes in a direction away from the frame 500), forming a protruding shape identical to the independent spring piece 410 in Embodiment 1. The elastic support structure 400 in this embodiment has a protruding section 412. The protrusion distance of the protruding section 412 makes the overall thickness of the skeleton rod 300 at this position greater than the distance between the front and rear side walls of the flip groove 220, so that the protruding section 412 is in a compressed elastic energy storage state after being inserted into the flip groove 220.

[0045] By utilizing the integrated elastic support structure 400, the same elastic support, damped rotation, and adaptive positioning effects as the independent spring sheet 410 can be achieved, while further reducing the number of parts and achieving a more streamlined effect.

[0046] In addition, the middle part of the elastic support structure 400 may also protrude toward one of the upper or lower sides of the attachment rod 100 or the flip groove 220, which can also achieve the elastic energy storage, damping and positioning effects mentioned above, and there are no restrictions here. Example 5

[0047] A type of eyeglasses, combining Figure 1 , 2 It includes a frame 500, a secondary mirror 600, and a secondary mirror 600 flipping structure. The secondary mirror 600 is rotatably attached to the frame 500 through one of the secondary mirror 600 flipping structures in embodiments 1-4.

[0048] The beneficial effects of this utility model are as follows: This utility model replaces the traditional complex hinge connection scheme with a modular combination of attachment rod 100, flip bushing 200, skeleton rod 300 and elastic support structure 400. This not only reduces the requirements for the precision of parts processing, but also reduces the difficulty of surface treatment processes such as electroplating. It is suitable for the needs of large-scale production, effectively improves production efficiency and significantly reduces manufacturing costs.

[0049] Meanwhile, the elastic protrusion of the elastic support structure 400 has a certain amount of flexibility to accommodate slight errors during assembly, eliminating the need for precise alignment of the pivot like traditional hinges. During actual installation, simply riveting the flip sleeve 200 to the attachment rod 100 of the frame 500 and fitting the frame rod 300 into the flip groove 220, allowing the spring piece 410 to be inserted into place, completes the assembly. This completely eliminates the tedious and time-consuming precise alignment steps, significantly reducing assembly time.

[0050] In addition, the elastic pre-tightening force of the elastic protrusion and the inner wall of the flip groove 220 can prevent the skeleton rod 300 from loosening or shaking when flipping; together with the limiting effect of the positioning groove 310 of the skeleton rod 300 on the elastic protrusion, the offset of the secondary mirror 600 can be effectively restricted. The double protection makes the secondary mirror 600 flip smoothly and steadily, improving the safety of use and the reliability of the structure.

[0051] In summary, the installation process of this structure is simple and efficient, requiring only three steps: First, the flip sleeve 200 is riveted onto the attachment rod 100 in the middle of the frame 500; second, the frame rod 300 is simultaneously fitted into the flip groove 220 formed by the attachment rod 100 and the flip sleeve 200; third, the spring piece 410 is inserted into place along one side of the flip groove 220. Meanwhile, the elastic protrusion of the elastic support structure 400 has a flexibility to accommodate slight assembly errors, eliminating the need for precise alignment like traditional hinges. This design is not only more user-friendly for manufacturing and surface treatment processes such as electroplating, but also completely eliminates the tedious and time-consuming installation steps, significantly improving production and assembly efficiency.

[0052] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A secondary mirror flipping structure, characterized in that, It includes an attachment rod (100), a flip sleeve (200), a frame rod (300), and a flexible support structure (400), wherein: The attachment rod (100) is integrally fixed or detachably mounted on the mirror frame (500) to provide an installation reference. The flip sleeve (200) is detachably fixed to the attachment rod (100), and the flip sleeve (200) and the attachment rod (100) enclose each other to form a flip groove (220) that passes through both sides; The elastic support structure (400) has an elastic protrusion that can elastically stretch and deform. The skeleton rod (300) is elastically pressed against the inner wall of the flip groove (220) by the elastic protrusion of the elastic support structure (400), which is used to drive the secondary mirror (600) to flip around the flip groove (220).

2. The secondary mirror flipping structure according to claim 1, characterized in that, The elastic support structure (400) is an independent spring piece (410), which is sandwiched between the outer surface of the attachment rod (100) and the skeleton rod (300) or between the skeleton rod (300) and the inner side wall of the flip sleeve (200) away from the attachment rod (100).

3. The secondary mirror flipping structure according to claim 2, characterized in that, The spring (410) has a first positioning structure (415) at both ends along its length direction, and the attachment rod (100) is provided with a second positioning structure that limits and cooperates with the first positioning structure (415).

4. The secondary mirror flipping structure according to claim 2, characterized in that, The top of the skeleton rod (300) is recessed with a positioning groove (310) adapted to the elastic protrusion to restrict its movement along the openings on both sides of the flip groove (220) when the elastic protrusion is inserted.

5. The secondary mirror flipping structure according to claim 2, characterized in that, The height of the spring piece (410) is adapted to the height of the flip groove (220).

6. The secondary mirror flipping structure according to claim 1, characterized in that, The elastic support structure (400) is integrally formed on the skeleton rod (300).

7. The secondary mirror flipping structure according to claim 1, characterized in that, The cross-sections of the attachment rod (100) and the skeleton rod (300) are both square.

8. The secondary mirror flipping structure according to claim 1, characterized in that, The flip-up bushing (200) and the attachment rod (100) are connected by one of the following methods: snap-fit ​​connection, riveting fixation, or welding.

9. The secondary mirror flipping structure according to claim 1, characterized in that, The elastic protrusion has a support surface (414) that fits against the inner wall of the flip groove (220).

10. A pair of eyeglasses, characterized in that, It includes a frame (500), a secondary mirror (600), and a secondary mirror (600) flipping structure as described in claim 1, wherein the secondary mirror (600) is rotatably attached to the frame (500) via the secondary mirror (600) flipping structure.

Images