Length-adjustable glasses leg

Abstract

The utility model provides a length-adjustable glasses leg, which comprises a long fixed leg and a movable leg, the movable leg is internally provided with an inserting groove connected with the fixed leg in a sliding manner, the fixed leg is provided with a hollow groove along the length direction, an elastic sheet with one fixed end is arranged in the groove, the middle part of the elastic sheet is arched to form a positioning part, and the side wall of the movable leg is correspondingly provided with a plurality of positioning grooves at intervals. A containing groove communicated with the inserting groove is further formed in the movable leg and allows the elastic piece to move, the fixed leg is provided with an operation groove communicated with the containing groove, and the position of the movable leg can be conveniently adjusted by pressing the elastic piece through a thumb nail or a tool. In addition, a spring for enhancing elasticity of the elastic piece and a mounting hole are arranged in the hollow groove, and a pressing groove is arranged in the middle of the elastic piece. The glasses leg length adjusting device does not need screws, is simple to operate, can quickly and accurately adjust the length of the glasses leg, and improves the wearing comfort.

Description

Technical Field

[0001] This utility model relates to the field of eyeglasses technology, specifically to an adjustable-length eyeglass temple. Background Technology

[0002] With the improvement of people's living standards, eyeglasses have become widely used as an important tool for correcting vision and protecting the eyes. In the field of eyeglass design and manufacturing, ensuring that eyeglasses can comfortably fit the facial features of different users has always been one of the key research directions. Among them, the fit between the temple length and the wearer's face is particularly important. The appropriate temple length not only improves wearing comfort but also reduces problems such as eyeglasses slipping off, ensuring the stability of eyeglasses during use.

[0003] In past eyewear manufacturing technologies, researchers have explored various methods to adjust the length of the temples, designing numerous adjustment structures. For example, patent application CN202021091690.3 discloses an adjustable pair of glasses (refer to Figure 1) where the temples change length through extension and retraction. However, this adjustment method has significant limitations: when the temples need to be adjusted to fit different users' facial contours, screws must be used to position and fix them after adjustment. In practice, the user must first find a suitable tool to loosen the screws, adjust the temples to the desired length, and then tighten the screws again. This series of steps is cumbersome and complex, especially in scenarios where frequent temple length adjustments are needed, such as multiple people sharing a pair of glasses or when a user's face changes rapidly due to certain factors. Frequent disassembly and installation of screws causes great inconvenience to users, consuming a lot of time and energy, and significantly impacting the ease of use of the glasses.

[0004] Furthermore, repeated disassembly and reassembly of screws can easily lead to thread wear and stripping, which not only further reduces the reliability of the adjustment mechanism but may also cause the temples to be loosely fixed, affecting the normal use of the glasses and even causing damage. Therefore, there is an urgent need for a new, easy-to-operate, stable, and reliable adjustable temple design to overcome the shortcomings of existing technologies and meet the market demand for comfortable and convenient eyewear products. Summary of the Invention

[0005] In view of the problems pointed out in the background art, this utility model proposes an adjustable length eyeglass temple to solve the above-mentioned technical problems.

[0006] The technical solution of this utility model is implemented as follows:

[0007] An adjustable-length eyeglass temple includes a fixed temple and a movable temple, wherein the movable temple has a slot that slides with the fixed temple.

[0008] The fixed leg has a hollow groove along its length, and a spring piece is provided in the hollow groove. One end of the spring piece is fixedly connected to the side wall of the hollow groove, and the middle part of the spring piece is arched to form a positioning part.

[0009] The side wall of the insertion slot is provided with a positioning groove that corresponds to the positioning part. There are multiple positioning grooves, which are spaced apart along the length of the movable leg.

[0010] The present invention is further configured such that the movable leg is provided with a receiving groove, the receiving groove is arranged along the length direction of the movable leg and communicates with the insertion groove, the width of the receiving groove is smaller than the width of the insertion groove, and the spring piece moves in the receiving groove.

[0011] The present invention is further configured such that the width of the spring piece is equal to or less than the width of the receiving groove.

[0012] The present invention is further provided that the movable leg is provided with an operating groove that communicates with the receiving groove, and the operating groove extends along the length direction of the movable leg.

[0013] The present invention is further configured such that a spring is provided in the hollow groove to apply elastic force to the other end of the spring piece.

[0014] The present invention is further provided that the side wall of the hollow groove is provided with a mounting hole for installing a spring.

[0015] The present invention is further configured such that the spring and the fixing leg are integrally formed.

[0016] The present invention is further provided that the middle part of the spring sheet is provided with a pressing groove.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0018] The adjustable temple length provided by this utility model is adjusted by a sliding connection between the movable temple and the fixed temple. The movable temple is positioned and fixed by the cooperation of a spring and a positioning groove. No further operation is required when adjusting the temple length; when the movable temple is pulled, the spring automatically deforms, entering the slot and leaving the positioning groove, allowing the movable temple to move and adjust the length. This achieves the goal of simple and convenient temple length adjustment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the existing technology.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model.

[0022] Figure 3 This is an exploded view of the present invention.

[0023] Figure 4 This is a cross-sectional view of the present invention.

[0024] Figure 5 This is an exploded view of the present invention. Figure 2 .

[0025] The following are the labels in the attached diagram: 1. Fixed leg; 2. Movable leg; 3. Insertion groove; 4. Hollow groove; 5. Spring piece; 6. Positioning part; 7. Positioning groove; 8. Receiving groove; 9. Operating groove; 10. Spring; 11. Mounting hole; 12. Pressing groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] For reference as follows Figures 1-5 The present invention will be described as follows:

[0028] Example: This utility model focuses on the innovative design of eyeglass temples, aiming to solve the problem of inconvenient adjustment of the length of traditional eyeglass temples.

[0029] An adjustable-length temple for eyeglasses includes a long, fixed temple 1 and a movable temple 2. The fixed temple 1 serves as the basic support, possessing a stable external structure that forms the foundation for subsequent adjustment functions. The movable temple 2 is the key component for achieving length changes. It features a slot 3 that slides smoothly along the fixed temple 1. The design of the slot 3 allows the movable temple 2 to slide tightly and smoothly along the fixed temple 1. The coordinated operation of these two components forms the basic framework for the dynamic adjustment of the temple length.

[0030] Key components: the hollow groove 4 and spring piece 5 structure of the fixing leg 1.

[0031] The fixed leg 1 has a hollow groove 4 along its length direction. The hollow groove 4 provides a specific spatial orientation for the placement of the spring piece 5, so that the spring piece 5 can operate in an orderly manner along the length direction of the fixed leg 1 during subsequent deformation and reset.

[0032] The hollowed-out groove 4 contains an elongated spring piece 5, which is the core elastic element for convenient adjustment of the temples.

[0033] One end of the spring piece 5 is fixedly connected to one side wall of the hollowed-out groove 4 along its length. The middle part of the spring piece 5 is arched to form a positioning part 6. In its natural state, the positioning part 6 protrudes from the surface of the hollowed-out groove 4 at a certain height, which is just enough to form a tight and stable fit with the positioning groove 7 on the movable temple 2. After the temple is assembled, the spring piece 5, due to its own elasticity, always maintains an outward elastic tendency (i.e., towards the movable temple 2), ready to mate with the positioning groove 7 at any time to lock the position of the movable temple 2.

[0034] The side wall of the insertion slot 3 is provided with positioning grooves 7 that correspond to and connect with the positioning part 6. There are multiple positioning grooves 7, which are spaced apart along the length of the movable leg 2. The depth, width, and smoothness of the inner wall of the positioning grooves 7 are subject to strict standards. The depth must ensure that the positioning part 6 of the spring piece 5 can provide sufficient friction and stability after being inserted to prevent the movable leg 2 from accidentally sliding during daily use; the width must precisely match the outer dimensions of the positioning part 6. If it is too wide, it cannot be effectively fixed, and if it is too narrow, it is easy to cause jamming.

[0035] Multiple positioning grooves 7 are spaced apart along the length of the movable temple 2. Different intervals correspond to different temple length adjustment levels. Users can easily stretch or retract the movable temple 2 to a suitable position according to their actual needs, so that the positioning part 6 of the spring 5 accurately falls into the corresponding positioning groove 7, thereby quickly achieving precise adjustment of the temple length.

[0036] Regulation principle and advantages:

[0037] In actual use, when it is necessary to adjust the length of the glasses temple to fit the facial contours of different users, the user only needs to hold the movable temple 2 with their hand and apply a certain pulling or pushing force along the length direction of the fixed temple 1. At this time, the movable temple 2 begins to slide relative to the fixed temple 1. Since the positioning part 6 of the spring 5 was originally stuck in the positioning groove 7, as the movable temple 2 moves, the spring 5 will be subjected to the squeezing force from the side wall of the positioning groove 7. Due to the excellent elasticity of the spring 5 itself, it will automatically deform and bend towards the inside of the hollow groove 4, so that the positioning part 6 can smoothly leave the current positioning groove 7 and release the locked state of the movable temple 2. The user can then freely move the movable temple 2 to the desired length position. Once the appropriate position is reached, due to the outward elastic force of the spring 5, the positioning part 6 will immediately find the next corresponding positioning groove 7 and automatically embed itself in it, so as to achieve precise positioning and fixation of the movable temple 2 again. The entire process requires no additional tools, such as screwdrivers, and eliminates the need for tedious screw removal and installation, greatly simplifying the temple length adjustment process and truly achieving the goal of making temple length adjustment simple and convenient, bringing users a brand-new and convenient glasses wearing experience.

[0038] The movable leg 2 has a receiving groove 8, which is set along the length of the movable leg 2 and communicates with the insertion groove 3. The width of the receiving groove 8 is smaller than the width of the insertion groove 3. The narrower receiving groove 8 can, on the one hand, provide a certain lateral constraint on the spring piece 5, preventing the spring piece 5 from shifting excessively during the force process, and ensuring that its deformation direction is basically consistent with the length direction of the movable leg 2, thereby ensuring the accuracy of positioning; on the other hand, the relatively narrow space can provide a dedicated and relatively compact placement area for the spring piece 5 without increasing the overall volume of the movable leg 2; moreover, it can also prevent the fixed leg 1 from entering the receiving groove 8.

[0039] The spring piece 5 moves within the receiving groove 8.

[0040] The width of the spring piece 5 is equal to or less than the width of the receiving groove 8. When the spring piece 5 is installed in the receiving groove 8, this fit ensures that the spring piece 5 can move smoothly in the receiving groove 8 without causing jamming or excessive friction due to excessive width. At the same time, it also avoids the spring piece 5 from wobbling in the receiving groove 8 due to being too narrow, which would affect its positioning stability.

[0041] The inclusion of the receiving groove 8 provides a key advantage to the entire temple adjustment mechanism. This dedicated space allows the spring 5, in its natural state, to possess sufficient curvature and length. From a mechanical perspective, sufficient curvature means that the spring 5 can store more elastic potential energy when subjected to external force. When the external force is released, such as when the movable leg 2 moves to the appropriate position, the spring 5 quickly rebounds using its stored elastic potential energy, precisely embedding the positioning part 6 into the positioning groove 7, achieving rapid and stable positioning.

[0042] Sufficient length ensures that the spring 5 is evenly stressed during deformation, preventing excessive local stress due to insufficient length and premature fatigue failure. This allows the spring 5 to provide sufficient elastic positioning force during temple adjustment. Whether it's slight movement during daily wear or occasional large movements, this strong elastic positioning force ensures the relative position between the movable temple 2 and the fixed temple 1 remains stable, guaranteeing the temple length is always appropriate and providing a reliable and comfortable wearing experience.

[0043] The movable leg 2 is provided with an operating groove 9 that communicates with the receiving groove 8, and the operating groove 9 extends along the length of the movable leg 2. The receiving groove 8 creates a convenient channel from the outside of the fixed leg 1 to the location of the spring piece 5. This connecting structure allows external forces to be accurately and effectively transmitted to the spring piece 5, breaking down the barriers between structures and creating conditions for active adjustment of the length of the eyeglass temple.

[0044] The operating groove 9 plays a crucial role when users need to manually adjust the length of their glasses temples to better fit their facial contours. Considering the convenience and naturalness of hand operation, using the thumb is the most convenient method. The user simply inserts their thumbnail gently into the operating groove 9; due to the precise positioning of the operating groove 9, the receiving groove 8, and the spring 5, the thumbnail can accurately contact the spring 5. At this point, by applying appropriate pressure, the spring 5 can be forced to deform.

[0045] In this process, the thumbnail acts as a natural "operating tool," possessing a certain degree of hardness and fine-tuning ability, enabling precise application of force within the confined space of the operating groove 9. Moreover, based on the muscle movement patterns and force feedback mechanisms of the human hand, the user can easily perceive the degree of deformation of the spring 5 by touch, thereby flexibly adjusting the applied force and achieving precise control over the deformation of the spring 5, laying the foundation for subsequent smooth adjustment of the position of the movable leg 2.

[0046] In addition to using the user's own thumbnail for operation, the operating groove 9 also considers diverse usage scenarios. In some cases, users may find it inconvenient to operate directly using their thumbnail due to reasons such as nails being trimmed too short, insufficient hand strength, or personal preference. In such cases, the space reserved in the operating groove 9 allows the use of other accessible tools to press the spring 5.

[0047] These tools can be small flat screwdrivers, plastic pry bars, etc., as long as their size can fit the width and depth requirements of the operating slot 9. When using the tools, the user inserts them into the operating slot 9, which can precisely act on the spring 5. Following a similar principle to manual operation, the spring 5 is forced to deform, thereby adjusting the position of the movable temple 2. This diversified adjustment method design fully considers the different needs of different users, greatly improving the flexibility and convenience of adjusting the temples of the glasses, making the overall glasses wearing experience more user-friendly.

[0048] The hollowed-out groove 4 contains a spring 10 that applies elastic force to the other end of the spring piece 5. When the spring piece 5 deforms during the adjustment of the temple length, for example, when the movable temple 2 moves and causes the spring piece 5 to bend under force, the spring 10, due to its own elastic properties, will simultaneously generate a counterforce. This force is superimposed in the same direction as the elastic restoring force of the spring piece 5 material itself, greatly enhancing the ability of the spring piece 5 to recover its elastic deformation.

[0049] Thanks to the assistance of the spring 10, the elastic positioning force between the spring 5 and the movable leg 2 is significantly increased, which makes the movable leg 2 more securely locked in different adjustment positions, and it is not easy for it to loosen or shift even after long-term use.

[0050] The side wall of the hollow groove 4 is provided with mounting holes 11 for installing spring 10. The depth of the mounting holes 11 should ensure that spring 10 has sufficient installation length, so that it can be firmly fixed in the hole and can smoothly expand and contract according to Hooke's Law when the spring piece 5 deforms, providing just the right elastic force support for the spring piece 5.

[0051] The spring 5 and the fixing temple 1 are integrated into one piece. This one-piece molding ensures the connection strength between the spring 5 and the fixing temple 1, preventing loosening or breakage at the connection point and improving the overall durability of the structure. Both are made of metal materials, such as stainless steel and titanium alloy. These metal materials possess excellent mechanical properties. On one hand, they have good strength, capable of withstanding the pulling and squeezing forces encountered during daily use of the glasses, ensuring structural integrity. On the other hand, the suitable elastic modulus of the metal materials gives the spring 5 excellent elasticity, making it less prone to fatigue failure during frequent deformation and recovery, providing a solid guarantee for the long-term, stable adjustment of the eyeglass temples.

[0052] The spring clip 5 has a pressing groove 12 in the middle. This pressing groove 12 plays a crucial role when a tool is needed to press the spring clip 5 to adjust the length of the eyeglass temples. The design of the pressing groove 12 is ingenious, taking into account the precision of the contact between the tool and the spring clip 5 and the stability of the applied force. Its shape and size are adapted to the shape of the tip of commonly used tools, such as small flat screwdrivers and plastic pry bars.

[0053] In actual operation, when the tip of the tool is inserted into the pressing groove 12, a stable point of force is formed. The tool can fit tightly against the groove wall, preventing slippage during pressing and ensuring that the force is applied vertically and precisely to the spring 5, causing the spring 5 to deform as expected. This precise operation method not only improves adjustment efficiency but also reduces the possibility of damage to the spring 5 or other structural components due to misoperation, providing great convenience for users or maintenance personnel when adjusting the temples of eyeglasses.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable length of glasses leg, comprising a fixed leg and a movable leg, the movable leg is provided with a plug-in slot slidably connected with the fixed leg, characterized in that: the fixed leg is provided with a hollow slot along the length direction of the fixed leg, the hollow slot is provided with a spring, one end of the spring is fixedly connected with the side wall of the hollow slot, and the middle part of the spring is arched to form a positioning part; the side wall of the plug-in slot is provided with a positioning groove corresponding to the positioning part, and the positioning groove is provided with a plurality of positioning grooves and is arranged in the length direction of the movable leg. the movable leg is provided with an accommodating slot, the accommodating slot is arranged along the length direction of the movable leg and is communicated with the plug-in slot, the width of the accommodating slot is smaller than the width of the plug-in slot, and the spring moves in the accommodating slot.

2. An adjustable length temple according to claim 1, wherein: the width of the spring is equal to or smaller than the width of the accommodating slot.

3. An adjustable length earstem as defined in claim 2, wherein: the movable leg is provided with an operation slot communicated with the accommodating slot, and the operation slot is arranged along the length direction of the movable leg.

4. An adjustable length earstem as defined in claim 2, wherein: the hollow slot is provided with a spring applying force to the other end of the spring.

5. An adjustable length earstem as defined in claim 2, wherein: the side wall of the hollow slot is provided with a mounting hole mounting the spring.

6. An adjustable length earstem as defined in claim 5, wherein: the spring and the fixed leg are integrally arranged.

7. An adjustable length earstem as defined in claim 1, wherein: the middle part of the spring is provided with a pressing groove.

8. An adjustable length earstem as defined in claim 1, wherein: ​

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