Eyeglasses with adjustable temple angle

Abstract

The glasses with adjustable temple angle include a temple and a head connected with the temple, the temple is provided with a first connecting piece, the head is provided with a second connecting piece, the first connecting piece and the second connecting piece are provided with splicing fixing holes, the head and the temple are connected by means of penetrating a fastener in the spliced fixing holes, the temple is further provided with a rotating space for inserting the first connecting piece and a rotating positioning piece matched with the first connecting piece, the temple and the first connecting piece are connected by a connecting bolt, and the temple and the rotating positioning piece can synchronously rotate longitudinally with the longitudinal section center line of the connecting position of the temple and the first connecting piece as the axis, and the rotating positioning piece is matched with the first connecting piece at different angle positions to position the temple. The glasses have the advantages that the connecting mode of the temple and the head is changed, and the service life and safety are remarkably improved.

Description

Technical Field

[0001] This utility model relates to a pair of eyeglasses, and more particularly to eyeglasses with adjustable temple tilt angles. Background Technology

[0002] In eyeglass manufacturing, the connection structure between the temples and the frame is a crucial component for ensuring wearing comfort and stability. Current technology typically employs a connecting piece at the center of the temple's end face facing the frame. This connecting piece is inserted into the frame and mechanically secured. The angle formed between the straight line from the center of the eye to the point on the back of the ear where the temple rests and the horizontal plane varies slightly among different users. Therefore, fine-tuning of the temple's longitudinal tilt angle—the vertical angle of the temple—is necessary to better fit the contour behind the ear. Eyeglasses are typically made of metal or plastic. Adjusting the longitudinal tilt angle of metal temples is usually performed manually by the user or a professional. This involves applying external force to bend the temple in the transition area between the connecting piece and the main body, utilizing the elasticity of the metal (such as titanium alloy or stainless steel) to form and maintain the desired angle. This adjustment method allows for personalization and improves wearing comfort; however, careful control of the force is required to avoid excessive deformation. Plastic materials commonly used to make temples, such as cellulose acetate, epoxy resin, and polypropylene, have less plasticity and toughness than metal materials. Therefore, temples made of plastic are not easy to bend to change the tilt angle and are prone to breakage during bending.

[0003] However, this existing technology has obvious drawbacks: First, relying on the elasticity of the material to repeatedly bend the connecting piece and the main body of the temple can easily lead to material fatigue, which may cause the material to become brittle or break under long-term use, reducing the service life and safety of the glasses; Second, it is difficult to precisely control the angle during the manual bending process, which can easily lead to inaccurate adjustment or excessive bending. This not only increases the complexity of operation, but may also damage the structural integrity of the temple or the main body, affecting the overall stability and aesthetics. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an adjustable temple tilt eyeglasses structure that avoids fatigue fracture caused by material bending and allows for adjustable longitudinal temple tilt angle.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An adjustable temple tilt eyeglass, comprising a temple and a headpiece connected thereto and mounted on the frame. A first connector is provided on the end face of the temple facing the headpiece, and a second connector is provided on the end face of the headpiece facing the temple. The first and second connectors have interlocking fixing holes. The headpiece and temple are connected by fasteners inserted into the interlocking fixing holes. The temple also has a rotational space for inserting the first connector and a rotational positioning component that cooperates with the first connector. The temple and the first connector are connected by connecting bolts, and the temple and the rotational positioning component can rotate synchronously longitudinally about the longitudinal cross-sectional centerline at the connection point between the temple and the first connector. The rotational positioning component cooperates with the first connector at several different angle positions to position the temple.

[0006] The beneficial effects of this utility model are as follows: This solution transitions the connection between the temple and the headband from "material bending (materials include metal and plastic)" to a mechanical connection that is "sponsorable and connected by fasteners with a rotating positioning structure." This avoids the risks of material fatigue, embrittlement, and breakage caused by repeatedly bending to change the temple angle, thus significantly improving service life and safety. Simultaneously, the engagement of the rotating positioning component and the first connecting component across several positions enables precise and resettable longitudinal tilt angle adjustment, eliminating the problems of difficult angle control and excessive bending associated with manual bending, facilitating standardized production and after-sales fine-tuning. Furthermore, by maintaining necessary gaps and rotational space between the temple end face and the headband end face, this structure avoids interference or scratches during adjustment, ensuring aesthetic integrity and smooth fit. In addition, the use of connecting bolts as the main connecting component facilitates disassembly and maintenance, and promotes parts replacement and recycling. As a preferred approach, a low-friction inner liner (such as a cylindrical bushing or sleeve) can be provided at the rotating interface of the temple to cooperate with the insertion end of the first connector, so that the temple has stable rotary bearing support and reduces wear when rotating longitudinally. As another preferred approach, the rotating positioning component can be designed as an annular retaining ring with multi-position bosses. The annular retaining ring is positioned in the inner cavity of the temple by a through-hole connecting bolt. The temple achieves position positioning by meshing with the retaining ring, and the position can be reversibly fine-tuned by elastic clamping or snap-fitting. Thus, structurally, it replaces simple point contact positioning and achieves the same positioning and anti-loosening functions.

[0007] Furthermore, the temple is symmetrically provided with mounting plates facing the temple, the rotation space is located between the two mounting plates, the first connector and the two mounting plates are provided with connecting holes that can be spliced ​​and for connecting bolts to pass through, and a countersunk hole whose center line coincides with the connecting hole is provided on one side of the mounting plate. The connector bolt includes a head that mates with the countersunk hole and a rod that mates with the connecting hole for connecting the first connector and the temple.

[0008] This technical solution establishes symmetrical mounting plates at the ends of the temples and confines the rotation space between the two plates, ensuring that the longitudinal rotation of the temples is completed within a defined space. This guarantees the coaxiality and assembly stability of the parts, reducing the risk of swaying or loosening caused by eccentric forces. The use of countersunk holes and matching bolt heads improves the flatness of the outer surface, preventing bolt heads from being exposed and causing discomfort or affecting the appearance. It also facilitates reliable positioning in automated assembly lines, improving assembly efficiency. As a preferred approach, the two mounting plates can be designed as detachable clamping plate structures. The clamping plates are aligned with the temple body via end face positioning pins, and the connecting bolts pass through the connecting holes and are concealed in the countersunk holes, thereby achieving rapid positioning and fastening during assembly, facilitating batch assembly and maintenance. As another preferred approach, thin elastic gaskets or isolation washers can be placed on the mating surfaces of the mounting plates to compensate for manufacturing tolerances and maintain the friction of the assembly through clamping force, improving anti-loosening performance during long-term use and reducing noise and micro-vibration.

[0009] Furthermore, the inner wall of the connecting hole is provided only on the part of the mounting plate on the other side, and the outer circumferential surface of the rod is provided with a thread of equal length to the part of the connecting hole; a clearance fit is formed between the rod and the inner wall of the connecting hole on the first connector.

[0010] This structure achieves functional separation between positioning and rotation by setting a limited-length thread on the inner side of one mounting plate to match the thread of the rod, while maintaining a clearance fit in the corresponding hole of the first connector: the threaded mounting plate is responsible for fixing and locking, while the clearance fit between the first connector and the rod avoids direct contact friction or interference during temple rotation, thereby reducing the risk of wear and jamming during rotation, protecting the integrity of the first connector and connecting bolts, and improving durability and user experience. As a preferred approach, the threaded mounting plate can be designed with a structure containing a metal nested nut, which is fixed by press-fitting or heat-fitting, thus ensuring the durability of the threaded area and facilitating replacement; as another preferred approach, a low-friction ring (such as a polymer ring or sliding washer) can be placed in the gap between the rod and the first connector to further reduce friction and avoid direct metal-to-metal contact while maintaining a clearance fit.

[0011] Furthermore, the temple is provided with a rotation positioning groove for placing the rotation positioning component. The end face of the first connector away from the side connected to the temple is provided with a plurality of position positioning grooves with a conical cross-section. The rotation positioning component is provided with a conical head and faces the position positioning groove and cooperates with it. A spring is also provided in the rotation positioning groove to make the rotation positioning component move towards the first connector.

[0012] This design achieves clear multi-position positioning and self-locking by setting a conical stop groove on the first connector and allowing a cone-shaped rotating positioning component to engage with it under spring force. This enhances the resistance to movement under external force, ensuring that the temples will not rotate unintentionally during daily wear or impacts. Simultaneously, the preload provided by the spring ensures reliable return to the original position after each adjustment and provides a certain degree of damping, making it easy for the user to perceive and adjust. As a preferred approach, the rotating positioning groove and spring seat can be designed as a coaxial insertion structure. The spring, through a pin or pressure rod, presses against the rear of the cone head to achieve stable preload, providing controllable mechanical feedback when the cone head enters or disengages from the position. Alternatively, the surface of the conical stop groove on the first connector can be treated with an involute or rounded corner to improve the contact surface shape of the cone head, reduce stress concentration, extend the service life of the positioning component and the stop groove, and control the stroke of the cone head through a limiting ring.

[0013] Furthermore, the rotating positioning component includes a conical portion and a parallel portion. The temple is provided with a limiting bolt that abuts against the parallel portion to prevent the rotating positioning component from wobbling within the rotating positioning groove. The temple is provided with a tail pin groove, one end of which is connected to the side of the rotating positioning groove away from the rotation space. A tail pin is provided in the tail pin groove that abuts against the spring. The longitudinal cross-sectional distance between the end faces of the tail pin and the spring is greater than the outer diameter of the spring.

[0014] This design effectively suppresses radial or axial wobble of the cone head by incorporating a conical and parallel section in the rotating positioning component, and by setting a limiting bolt inside the temple to support the parallel section. This ensures consistent positioning accuracy and repeatability. The tail pin and spring mechanism, along with the tail pin groove structure, provide a stable spring fulcrum and guide, achieving elastic preload. Furthermore, the longitudinal cross-sectional distance between the tail pin and spring contact surfaces is greater than the spring's outer diameter, increasing the load-bearing stability of the contact surface and preventing spring offset or localized flattening, thus ensuring reliable elastic response during long-term use. As a preferred option, the tail pin can be designed as a pin structure with a radial shoulder, installed via a push-in mechanism and featuring a locking ring on the outside for quick disassembly and assembly during maintenance while maintaining positioning accuracy. Alternatively, the limiting bolt can be connected to the temple body via a positioning washer and an anti-loosening lock to ensure the limiting bolt does not loosen under vibration, thereby maintaining the radial constraint force of the cone head.

[0015] Furthermore, the rotating positioning component is pressed onto the assembly plate on one side by connecting bolts. The rotating positioning component has several sets of positioning protrusions on the side away from the connecting part. The first connecting component has protrusion positioning grooves corresponding to the number of sets of positioning protrusions. Among the several sets of positioning protrusions, at least one set of positioning protrusions cooperates with the protrusion positioning groove.

[0016] This technical solution involves setting multiple positioning protrusions on the rotating positioning component and equipping the first connecting component with corresponding positioning grooves. This ensures that when the temple and the rotating positioning component rotate synchronously to a certain position, at least one set of protrusions can engage with the positioning grooves to create stable point contact constraints. This provides a mechanical locking effect against lateral and torsional forces, further improving the temple angle retention and anti-loosening performance. Simultaneously, the pressure-fit installation method utilizes pre-tightening force to reduce gaps between parts and improve overall structural rigidity. As a preferred approach, the positioning protrusions can be designed as raised areas distributed on the surface of the elastic part, with a slight chamfer within the positioning groove of the first connecting component. This provides guidance when the protrusions enter and creates a noticeable "click" when in place, facilitating user perception. Another preferred approach is to locally apply wear-resistant materials or coatings to the contact surfaces between the protrusions and the positioning grooves to reduce wear and extend the service life of the positioning component. Simultaneously, localized heat treatment can enhance the load-bearing capacity of the protrusions.

[0017] Furthermore, the rotating positioning component includes a connecting part and an elastic part. The connecting part is pressed onto an assembly plate on one side by connecting bolts. The elastic part has several sets of positioning protrusions protruding on the side away from the connecting part. An elastic angle is formed between the elastic part and the connecting part in the transverse cross section. The first connecting part abuts against the elastic part, making the elastic angle smaller.

[0018] This design divides the rotating positioning component into a rigid connecting part and an elastic part. When the elastic part contacts the first connecting part, the elastic angle decreases, thus generating a stable preload through elastic deformation. This structure ensures reliable engagement between the positioning protrusion and the positioning groove, while maintaining the clamping force of the connecting part through elastic restoring force, balancing positioning accuracy and anti-loosening function. The elastic structure also absorbs manufacturing tolerances and minor impacts, improving wearing comfort and structural durability. As a preferred approach, a single-piece stamped elastic sheet and connecting part can be integrated through bending, reducing the number of parts and improving assembly reliability. Alternatively, the elastic part can be made of a high-strength elastic metal or engineering plastic with a certain degree of resilience, and a limiting groove can be set at the connecting part to control the minimum value of the elastic angle, preventing excessive deformation.

[0019] Furthermore, the first connector includes a connecting piece for connecting with the second connector. The head is provided with a straightening groove, and a straightening pin is provided in the straightening groove, one end of which abuts against the connecting piece. When the temple rotates in the transverse section, it compresses the straightening pin. When the straightening pin resets, it drives the temple to rotate in the transverse section and makes the center line of the temple coincide with the center line of the head.

[0020] This technical solution, by incorporating a centering groove and a centering pin within the temple, endows the temple with an active self-aligning function in the lateral section. This allows the temple to automatically or conveniently return to its position aligned with the temple's center line after lateral deflection, thanks to the elastic restoring force of the centering pin. This avoids discomfort or optical center misalignment caused by small lateral angle deviations. The structure also separates the lateral adjustment range from the longitudinal adjustment range, reducing lateral stress concentration on the first connecting piece and protecting the connecting piece from plastic deformation. As a preferred option, the centering pin can be designed as a spring-preloaded pin assembly, with the pin engaging with the temple's fixing hole via a small-diameter guide sleeve for smooth return. Alternatively, the connecting piece's abutment surface can be designed as a partially arc-shaped guide surface to ensure a smooth transition and reduce friction and impact when the pin resets and drives the temple back to center.

[0021] Furthermore, the connecting piece includes a first abutting surface, a second abutting surface, and a third abutting surface. The first abutting surface is perpendicular to the second and third abutting surfaces, respectively. The second and third abutting surfaces are parallel to each other. A first arcuate surface is formed between the first and second abutting surfaces. A second arcuate surface is formed between the first and third abutting surfaces. The radius of the first arcuate surface is smaller than the radius of the second arcuate surface. The width of the first and second abutting surfaces is greater than the width of the third abutting surface.

[0022] This structure, by setting multiple abutment surfaces with different geometric shapes and widths, as well as arc-shaped surfaces with different radii on the connecting piece, ensures that the centering pin has a clear and predictable contact surface in different working states (normal use position, retracted position, and outward expansion position). This achieves stable mechanical limiting and transition between positions, preventing jamming or excessive free rotation. The wider second abutment surface provides a stable locking surface in the retracted position, while the difference in arc radius ensures self-centering in the outward expansion direction and smooth transition in inward rotation, which is beneficial for the wearer's smooth operation and position maintenance during daily opening, closing, and adjustment. As a preferred method, the three sides of the connecting piece can be integrally stamped or CNC bent to ensure the accuracy of the geometric relationship, while the surface of the arc-shaped surface is chamfered to reduce stress concentration. As another preferred method, replaceable pads (such as engineering plastic or polymer gaskets) can be set at the contact points between the second and third abutment surfaces and the centering pin to maintain the performance of the contact surfaces during long-term use and facilitate later replacement, thereby extending the overall life of the device.

[0023] Furthermore, the longitudinal rotation angle of the temple is ±2°, and the center line of this rotation angle coincides with the center line of the longitudinal section at the connection point between the temple and the first connector.

[0024] This limitation, by controlling the longitudinal rotation angle within ±2° and using the center line of the longitudinal section at the connection point as the rotation center, ensures sufficient angle changes for facial fit and comfort adjustments while avoiding stress concentration or interference problems caused by excessive angles. This balances functionality with structural strength requirements, facilitating material selection and fatigue life design. Furthermore, using the connection point as the rotation center allows for a more rational torque distribution, facilitating stable gear control and alignment with the headstock. As a preferred approach, a limited-stroke stop structure can be used at the contact interface between the rotating positioning component and the first connecting component to physically limit the rotation angle within ±2° and prevent over-adjustment. Alternatively, during assembly, the position of the rotation center can be fine-tuned by adjusting the assembly plate gap or using shims to ensure the rotation center coincides with the center line of the longitudinal section at the connection point, thus achieving the specified angle control and repeatability accuracy in the structure. Attached Figure Description

[0025] Figure 1 This is a partial longitudinal cross-sectional view of Embodiment 1 of the present invention; Figure 2 This is a partial cross-sectional view of Embodiment 1 of the present invention; Figure 3 This is a partial transverse cross-sectional view of the connection between the second connector and the connecting piece in an embodiment of this utility model; Figure 4 This is a longitudinal cross-sectional view of the Zhuangtou in an embodiment of the present utility model; Figure 5 This is a partial cross-sectional view of the temple of the mirror in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first connecting member and the rotating positioning member in Embodiment 1 of this utility model; Figure 7 This is a partial transverse cross-sectional view of the rotation space in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the structure of the first connecting member in Embodiment 2 of this utility model; Figure 9 This is a schematic diagram of the rotating positioning component in Embodiment 2 of this utility model. Detailed Implementation

[0026] Example 1 An embodiment of the present invention provides eyeglasses with adjustable temple tilt angles, such as... Figure 1-6As shown: The temple 1 and the headband 2 set on the frame cooperate to form a connection assembly between the temple and the headband. The end face of the temple 1 facing the headband 2 is provided with a first connector 11 for insertion, and the end face of the headband 2 facing the temple 1 is provided with a second connector 21 for splicing. The first connector 11 and the second connector 21 are provided with splicing fixing holes 3. The headband 2 and the temple 1 are initially spliced ​​and fixed by fasteners 4 passing through the splicing fixing holes 3. To ensure that the temple 1 is longitudinally adjustable and does not interfere with the end face of the headpiece 2, a gap is maintained between the corresponding end faces of the temple 1 and the headpiece 2; the temple 1 has a rotation space 12 for accommodating the first connecting member 11 near the end face; a rotation positioning member 15 that cooperates with the first connecting member 11 is provided in or near the rotation space 12; the temple 1 and the first connecting member 11 are connected by connecting bolts 14 to form a hinged or detachable rotational connection; the temple 1 and the rotation positioning member 15 can rotate synchronously longitudinally around the longitudinal cross-sectional centerline of the connection between the temple 1 and the first connecting member 11 as a pivot, and the rotation positioning member 15 cooperates with the first connecting member 11 at several different angle positions to achieve the positioning of the temple 1.

[0027] Structurally, mounting plates 13 are symmetrically arranged on both sides of the temple 1 towards the head 2. The rotation space 12 is located between the two mounting plates 13. The first connecting member 11 and the two mounting plates 13 are provided with connecting holes 5 for connecting bolts 14 to pass through. One of the mounting plates 13 has a countersunk hole 51 concentric with the connecting hole 5 to accommodate the head 141 of the connecting bolt 14, thus ensuring a flat appearance and facilitating assembly. To balance wear and fit during fixing and rotation, the connecting hole 5 has an internal thread in a section near one of the mounting plates 13 to mate with the shank 142 of the connecting bolt 14. The shank 142 of the connecting bolt 14 only has a threaded section matching the threaded section at the corresponding position, so that the shank 142 and the remaining inner wall of the corresponding connecting hole 5 on the first connecting member 11 maintain a clearance fit, so that the shank 142 and the first connecting member 11 do not interfere when the temple 1 rotates longitudinally.

[0028] Regarding the placement structure of the rotating positioning member 15, the temple 1 is provided with a rotating positioning groove 16 to accommodate the rotating positioning member 15 and provide radial and axial guidance to it; the first connecting member 11 has several cone-shaped positioning grooves 111 on the end face away from the side connected to the head 2, the rotating positioning member 15 is provided with a cone head 151 and the cone head 151 is positioned towards the positioning groove 111 and engages with it, and a spring 161 is also arranged in the rotating positioning groove 16 to make the cone head 151 move towards the first connecting member 11. The cone head 151 is further composed of a cone portion 1511 and a parallel portion 1512. A limiting bolt 17 is provided on the temple 1 to abut against the parallel portion 1512 to prevent the cone head 151 from shaking in the rotation positioning groove 16. A tail needle groove 18 is also provided in the temple 1, which is connected to the side of the rotation positioning groove 16 away from the rotation space 12. A tail needle 181 is inserted into the tail needle groove 18 and abuts against the spring 161. The longitudinal cross-sectional distance between the end faces of the tail needle 181 and the spring 161 is greater than the outer diameter of the spring 161 to ensure the stable support of the tail needle 181 on the spring 161.

[0029] Regarding the lateral alignment mechanism, the first connecting member 11 includes a connecting piece 112 for connecting with the second connecting member 21. A alignment groove 22 is provided within the temple 2, and a alignment pin 23, one end of which abuts against the connecting piece 112, is provided within the alignment groove 22. When the temple 1 deflects laterally, the relative displacement of the external structure of the temple 1 or the first connecting member 11 will compress the alignment pin 23. Upon resetting, the alignment pin 23, through contact with the connecting piece 112, causes the temple 1 to rotate in the lateral section, aligning the centerline of the temple 1 with the centerline of the temple 2. To achieve different contact positions between the connecting piece 112 and the centering pin 23, the connecting piece 112 is provided with a first abutting surface 1121, a second abutting surface 1122 and a third abutting surface 1123, and a first arc-shaped surface 1124 is formed between the first abutting surface 1121 and the second abutting surface 1122, and a second arc-shaped surface 1125 is formed between the first abutting surface 1121 and the third abutting surface 1123. The radius of the first arc-shaped surface 1124 is smaller than the radius of the second arc-shaped surface 1125, and the width of the second abutting surface 1122 and the first abutting surface 1121 is greater than the width of the third abutting surface 1123, so as to form different limiting and centering effects when in normal use, retracted and outward expansion.

[0030] The working principle of Embodiment 1 is as follows: When it is necessary to adjust the longitudinal tilt angle of the temple 1, the operator applies torque while the first connecting piece 11 remains relatively stationary, causing the temple 1 and the rotating positioning piece 15 to rotate synchronously around the longitudinal cross-sectional centerline at the connecting bolt 14. During the rotation, the cone head 151, due to the small gap between it and the rotating positioning groove 16, will rotate with the temple 1 and move from one position of the cone-shaped positioning groove 111 on the first connecting piece 11 to another position. Then, under the thrust of the spring 161, the position is locked, thereby achieving discrete angle positioning and preventing unintentional rotation caused by slight external force. To prevent interference between the temple 1 and the end face of the temple head 2 when rotating, the clearance and rotation space 12 reserved during assembly ensure the freedom of the rotation path. When the temple 1 is laterally deflected towards the outside of the headpiece 2, the contact surface that cooperates with the centering pin 23 during its rotation moves in the direction of the first abutting surface 1121-the second arc-shaped surface 1125-the third abutting surface 1123. At this time, the centering pin 23 is compressed. When the centering pin 23 just abuts against the second arc-shaped surface 1125 after the external force disappears, the centering pin 23 will have a reset tendency and bring the temple 1 back to the standard center line position because the arc-shaped surface is in contact with the plane, thus ensuring the alignment of the temple 1 and the headpiece 2 in the transverse section. When the temple 1 is laterally deflected toward the inner side of the headpiece 2, the contact surface that cooperates with the alignment pin 23 during its rotation moves in the direction of the first abutment surface 1121 - the first arc surface 1124 - the second abutment surface 1122. At this time, the alignment pin 23 is compressed. When the alignment pin 23 just abuts against the first arc surface 1124 after the external force disappears, the alignment pin 23 will have a reset tendency and bring the temple 1 back to the standard center line position, ensuring the alignment of the temple 1 and the headpiece 2 in the lateral section. When the alignment pin 23 just abuts against the second abutment surface 1122 after the external force disappears, the two planes are in contact, which can limit the reset of the alignment pin 23, thereby maintaining the folded state of the temple 1. To maintain the wear resistance and feel of the components, the contact surfaces of the first connector 11 and the rotating positioning component 15 can be provided with low-friction bushings or surface hardening treatment. The shank 142 of the connecting bolt 14 and the first connector 11 are kept in clearance fit to avoid contact during rotation.

[0031] Example 2 Embodiment 2 of the present invention Figure 3-5As shown in 7-9, the basic components shared with Embodiment 1 include temple 1, head 2, first connector 11, second connector 21, fixing hole 3, fastener 4, connecting hole 5, countersunk hole 51, rotation space 12, connecting bolt 14, assembly plate 13, alignment groove 22, alignment pin 23, and connecting piece 112, etc., and their structural designations are consistent with those of the aforementioned embodiments. The difference lies in the fact that, in this second embodiment, the rotating positioning member 15 is designed to include a connecting part 152 and an elastic part 153 protruding from the side away from the connecting part 152. Several sets of positioning protrusions 1531 are arranged on the outer surface of the elastic part 153. The first connecting member 11 is provided with a protrusion positioning groove 112 that matches the positioning protrusions 1531 at the corresponding position. The connecting part 152 is pressed onto the mounting plate 13 on one side by the connecting bolt 14. The elastic part 153 and the connecting part 152 form a preset elastic angle in the transverse section. When the first connecting member 11 is assembled, it abuts against the elastic part 153, which reduces the elastic angle and thereby generates a continuous preload.

[0032] The working principle of this embodiment is as follows: During assembly, the connecting part 152 of the rotating positioning member 15 and the first connecting member 11 are aligned with the positioning position of the assembly plate 13 and pressed and fixed by the connecting bolt 14, so that the elastic part 153 protrudes outward at a predetermined included angle to form a positioning protrusion 1531. After the first connecting member 11 is assembled in place, its protrusion positioning groove 112 is aligned with the positioning protrusion 1531 and partially fitted under the action of the clamping force. The elastic deformation of the elastic part 153 causes the positioning protrusion 1531 to generate lateral and radial contact force on the protrusion positioning groove 112, thereby achieving the positioning and anti-loosening effect of "point contact + elastic pre-compression". When the longitudinal tilt angle of the temple 1 needs to be adjusted, an appropriate torque is applied to make the temple 1 rotate synchronously with the rotating positioning member 15 until a group of positioning protrusions 1531 moves out of their original position and enters or aligns with the corresponding protrusion positioning grooves 112 on the first connecting member 11. The rebound force of the elastic part 153 presses the positioning protrusions 1531 into the protrusion positioning grooves 112 and generates perceptible positioning feedback, ensuring that the temple 1 is stably maintained at that position. This structure can achieve reliable position locking without relying on sharp conical engagement by using the elasticity of the elastic part 153 and the point contact characteristics of the positioning protrusions 1531. Furthermore, the position can be fine-tuned and the mechanical characteristics optimized by changing the number and distribution of the protrusion groups. For ease of assembly and maintenance, the connecting part 152 and the elastic part 153 can be integrally stamped metal spring parts, or the elastic part 153 can be made of high-resilience engineering material embedded in the connecting part 152; at the contact surface between the elastic part 153 and the first connecting member 11, wear-resistant surface treatment or micro-shiels can be added to extend service life and reduce friction noise. In the second embodiment, the lateral return function can also be achieved with the centering pin 23, and reliable fixation and clearance fit with the temple 1 can be achieved through the countersunk hole 51 and the threaded part.

[0033] It should be noted that the connection structure between the connecting piece 112 and the second connecting member 21 in the above embodiments 1 and 2 is similar to the connection method between the first connecting member 11 and the temple 1. Similarly, the fastener 4 only cooperates with a part of the second connecting member 21 for fixation. The outer peripheral surface of the position where it cooperates with the connecting piece 112 is the optical axis and a clearance fit is formed between it and the connecting piece 112 to facilitate the rotation of the connecting piece 112.

[0034] The above embodiments are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A pair of eyeglasses with adjustable temple tilt angle, comprising temples and a headband connected thereto and disposed on a frame, wherein a first connector is disposed on the end face of the temple facing the headband, and a second connector is disposed on the end face of the headband facing the temple; the first and second connectors are provided with interlocking fixing holes; the headband and temples are connected by fasteners passing through the interlocking fixing holes, characterized in that: The temple is also provided with a rotation space for inserting the first connector and a rotation positioning component that cooperates with the first connector. The temple and the first connector are connected by connecting bolts, and the temple and the rotation positioning component can rotate synchronously longitudinally about the longitudinal cross-sectional centerline at the connection between the temple and the first connector. The rotation positioning component cooperates with the first connector at several different angle positions to position the temple.

2. The eyeglasses with adjustable temple tilt angle according to claim 1, characterized in that: The temple is symmetrically provided with mounting plates facing the head, and the rotation space is located between the two mounting plates. The first connector and the two mounting plates are provided with connecting holes that can be spliced ​​and for connecting bolts to pass through. A countersunk hole with its center line coinciding with the connecting hole is provided on one side of the mounting plate. The connecting bolt includes a head that mates with the countersunk hole and a rod that mates with the connecting hole for connecting the first connector and the temple.

3. The eyeglasses with adjustable temple tilt angle according to claim 2, characterized in that: The connecting hole has a threaded line on its inner wall only on the part of the mounting plate on the other side, and the outer circumferential surface of the rod has a threaded line of a length corresponding to the connecting hole only; a clearance fit is formed between the rod and the inner wall of the connecting hole located on the first connector.

4. The eyeglasses with adjustable temple tilt angle according to claim 3, characterized in that: The temple is provided with a rotation positioning groove for placing the rotation positioning component. The end face of the first connector away from the side connected to the temple is provided with a number of position positioning grooves with a conical cross section. The rotation positioning component is provided with a conical head and faces the position positioning groove and cooperates with it. The rotation positioning groove is also provided with a spring for causing the rotation positioning component to move towards the first connector.

5. The eyeglasses with adjustable temple tilt angle according to claim 4, characterized in that: The rotating positioning component includes a conical portion and a parallel portion. A limiting bolt is provided on the temple to abut against the parallel portion to prevent the rotating positioning component from shaking in the rotating positioning groove. A tail pin groove is provided in the temple, one end of which is connected to the side of the rotating positioning groove away from the rotation space. A tail pin is provided in the tail pin groove to abut against the spring. The longitudinal cross-sectional distance between the end faces of the tail pin and the spring is greater than the outer diameter of the spring.

6. The eyeglasses with adjustable temple tilt angle according to claim 3, characterized in that: The rotating positioning component is pressed onto the assembly plate on one side by connecting bolts. The rotating positioning component has several sets of positioning protrusions on the side away from the connecting part. The first connecting component has protrusion positioning grooves corresponding to the number of sets of positioning protrusions. Among the several sets of positioning protrusions, at least one set of positioning protrusions cooperates with the protrusion positioning groove.

7. The eyeglasses with adjustable temple tilt angle according to claim 6, characterized in that: The rotating positioning component includes a connecting part and an elastic part. The connecting part is pressed onto an assembly plate on one side by connecting bolts. The elastic part has several sets of positioning protrusions protruding on the side away from the connecting part. An elastic angle is formed between the elastic part and the connecting part in the transverse cross section. The first connecting part abuts against the elastic part, making the elastic angle smaller.

8. The eyeglasses with adjustable temple tilt angle according to claim 1, characterized in that: The first connector includes a connecting piece for connecting with the second connector. The head is provided with a straightening groove, and a straightening pin is provided in the straightening groove, one end of which abuts against the connecting piece. When the temple rotates in the transverse section, it compresses the straightening pin. When the straightening pin resets, it drives the temple to rotate in the transverse section and makes the center line of the temple coincide with the center line of the head.

9. The eyeglasses with adjustable temple tilt according to claim 8, characterized in that: The connecting piece includes a first abutting surface, a second abutting surface, and a third abutting surface. The first abutting surface is perpendicular to the second and third abutting surfaces, and the second and third abutting surfaces are parallel to each other. A first arc-shaped surface is formed between the first and second abutting surfaces. A second arc-shaped surface is formed between the first and third abutting surfaces. The radius of the first arc-shaped surface is smaller than the radius of the second arc-shaped surface, and the width of the first and second abutting surfaces is greater than the width of the third abutting surface.

10. The eyeglasses with adjustable temple tilt according to any one of claims 1-9, characterized in that: The longitudinal rotation angle of the temple is ±2°, and the center line of this rotation angle coincides with the center line of the longitudinal section at the connection point between the temple and the first connector.

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