An ophthalmic lens inner ring tilt angle measuring instrument

Abstract

The utility model provides a kind of eyeglass lens inner circle inclination measuring instrument, it relates to glasses measuring technical field, this kind of eyeglass lens inner circle inclination measuring instrument is mainly constituted by shell and swing pointer, compared with the unstable contact of lens caused by the plane reference surface of prior art, the measurement data is susceptible to sliding interference, the utility model is limited by contact point position by pair of lugs, recess position contains lens camber, and pair of lugs form stable camber measuring reference by synergistic effect, reliable lamination of reference surface and lens edge is ensured in the process of measurement, to obtain accurate inner circle inclination measurement result, the repeatability and accuracy of inclination measurement are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of eyeglass measurement technology, and in particular to an eyeglass lens inner ring tilt measuring instrument. Background Technology

[0002] Eyeglasses are lenses encased in frames and worn in front of the eyes to improve vision, protect the eyes, or for decorative purposes. Eyeglasses can correct various vision problems, including nearsightedness, farsightedness, astigmatism, presbyopia, and strabismus. They are available in four types: nearsighted glasses, farsighted glasses, presbyopia glasses, and astigmatism glasses. Specialized eyeglasses are also available for viewing 3D or virtual reality images.

[0003] In order to measure the tilt angle of spectacle lenses, a spectacle lens tilt angle measuring device was developed. It is an auxiliary device used to measure the tilt angle of spectacle lenses and has been widely used in the field of mechanical equipment.

[0004] Existing spectacle lens tilt angle measuring devices mostly use flat measuring surfaces, while spectacle lenses are mostly curved. Using a flat structure to measure a curved structure leads to inaccurate measurement of the inner tilt angle of the spectacle lens. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a spectacle lens inner ring tilt angle measuring instrument to solve the technical problem that the existing spectacle lens tilt angle measuring device uses a planar structure to measure the curved surface of the spectacle lens, resulting in inaccurate measurement of the inner ring tilt angle of the spectacle lens.

[0006] To achieve the above objectives, this utility model provides a spectacle lens inner ring tilt measuring instrument, including a housing and a swing pointer. The housing has a truncated circular structure, and the swing pointer is swingably mounted inside the housing. The edge of the housing is provided with a pair of protrusions, which are spaced at a preset distance on the same side of the housing, and the protrusions are recessed between each other.

[0007] Optionally, the housing includes a bottom shell and a cover, the bottom shell having a receiving cavity, the swing pointer being mounted in the receiving cavity, and the cover being disposed on the receiving cavity.

[0008] Optionally, the bottom of the base shell is provided with a mounting platform, and a pin is provided on the mounting platform, and the swing pointer is rotatably mounted on the pin.

[0009] Optionally, the swinging pointer includes a pointer portion and a swinging portion, wherein the swinging portion is located below the pointer portion and is integrally formed with the pointer portion.

[0010] Optionally, the pointer portion has a conical structure, and the swing portion has a crescent-shaped mechanism.

[0011] Optionally, the pointer portion is mounted on the pin.

[0012] Optionally, limiting posts are provided on both sides of the pointer portion, and a preset gap is provided between the pointer portion and the limiting posts.

[0013] Optionally, the bottom shell includes a cut-edge portion and a non-cut-edge portion, the protrusion is located in the non-cut-edge portion, and the accommodating cavity has a circular structure with a cut-edge structure.

[0014] Optionally, the bumps include six, and the bumps are equidistantly disposed on the edge of the non-cut edge portion.

[0015] Optionally, the cover is transparent.

[0016] Optionally, the lens inner ring tilt measuring instrument is shaped like an owl.

[0017] The spectacle lens inner ring tilt angle measuring instrument provided by this utility model has the following technical effects: This spectacle lens inner ring tilt measuring instrument mainly consists of a housing and a swing pointer. Compared with existing instruments that use a planar reference surface, which leads to unstable lens contact and makes measurement data susceptible to sliding interference, this invention uses paired protrusions to define the contact point position and a recessed position to accommodate the lens curvature. The paired protrusions work together to form a stable curved surface measurement reference, ensuring reliable contact between the reference surface and the lens edge during the measurement process. This results in accurate inner ring tilt measurement results and significantly improves the repeatability and accuracy of tilt measurement. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a three-dimensional structural domain schematic diagram of a preferred embodiment of the spectacle lens inner ring tilt measuring instrument of this utility model; Figure 2 yes Figure 1 Front view of the spectacle lens inner ring tilt measuring instrument; Figure 3 yes Figure 1 Schematic diagram of the internal structure of a spectacle lens inner ring tilt measuring instrument; Figure 4 yes Figure 3 The front view of the internal structure.

[0020] in, Figures 1-4 : 1. Shell; 11. Bottom shell; 111. Protrusion; 112. Recess; 113. Receiving cavity; 114. Limiting post; 115. Mounting platform; 116. Pin; 117. Cut edge; 118. Non-cut edge; 12. Cover; 2. Swinging pointer; 21. Pointer part; 22. Swinging part. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In existing technologies, most spectacle lens tilt angle measuring devices use a planar structure as the measurement reference surface. Because the inner ring of the spectacle lens has a curved shape, the planar reference surface is prone to slippage or displacement when in contact with the curved surface, leading to unstable contact points during measurement. This structural difference prevents the measuring instrument from accurately conforming to the lens curvature, especially when measuring the inner ring tilt angle, where the contact area between the reference surface and the lens edge is too small, directly affecting the reliability of the measurement data.

[0023] Therefore, as Figure 1-4 As shown, this utility model provides a spectacle lens inner ring tilt angle measuring instrument. The spectacle lens inner ring tilt angle measuring instrument includes a housing 1 and a swing pointer 2. The housing 1 adopts a chamfered circular structure. The swing pointer 2 can be swing-mounted inside the housing 1. The edge of the housing 1 is provided with a pair of protrusions 111. The pair of protrusions 111 are arranged on the same side of the housing 1 at a preset distance. There is a recess 112 between the protrusions 111.

[0024] The housing 1 features a chamfered circular structure, where the edges of the housing 1 are cut to form flat surfaces, while the remaining portion retains a circular outline. This chamfered structure is used to accommodate the local curvature of the inner ring of the lens. The swing pointer 2 is mounted with a swing mechanism; the pointer is connected to the housing 1 via a rotating shaft, specifically using a pin 116 in conjunction with a bearing. It is used to sense changes in the lens tilt angle and indicate the measured value. The pre-set distance between the paired protrusions 111 is determined according to the lens size and is used to fix the contact position of the measurement reference. The recessed area 112, located between the paired protrusions 111, is an arc-shaped region formed by the inward indentation of the edge of the housing 1, used to accommodate the curvature of the lens edge to avoid interference.

[0025] Specifically, during measurement, the inner edge of the lens is embedded in the recess 112, and pairs of protrusions 111 abut against the two sides of the lens, ensuring the stability of the measurement reference by defining the contact point position. The swing pointer 2 swings around its axis as the lens tilt angle changes, and its offset reflects the tilt angle value. The recess 112 matches the curvature of the inner ring, avoiding a hard collision between the housing 1 and the lens during measurement.

[0026] Compared with existing methods that use a planar reference surface, which leads to unstable lens contact and makes measurement data susceptible to sliding interference, this invention defines the contact point position by using paired protrusions 111 and recesses 112 to accommodate the lens curvature. The paired protrusions 111 work together to form a stable curved surface measurement reference, significantly improving the repeatability and accuracy of tilt angle measurement.

[0027] Through the above technical solution, this utility model solves the problem of unstable contact between the planar measurement reference and the curved lens. By limiting the contact point, it ensures reliable contact between the reference surface and the edge of the lens during the measurement process, thereby obtaining accurate inner ring tilt angle measurement results.

[0028] As a preferred embodiment, such as Figure 1 and Figure 2 As shown, the housing 1 includes a bottom shell 11 and a cover 12. The bottom shell 11 has a receiving cavity 113. The swing pointer 2 is installed in the receiving cavity 113. The cover 12 is disposed on the receiving cavity 113. The cover 12 has the same shape and size as the receiving cavity 113.

[0029] The bottom shell 11 is a supporting component that carries the main structure of the measuring instrument. Its function is to provide rigid support for the accommodating cavity 113 and maintain the overall structural stability. The cover 12 is a closed component that covers the accommodating cavity 113. Its function is to protect the swing pointer 2 from external interference. Since the cover 12 is made of transparent material, it also allows the operator to observe the movement of the pointer. The accommodating cavity 113 is a hollow structure inside the bottom shell 11 used to accommodate the swing pointer 2. Its function is to provide a limited space for the swing pointer 2 to move and prevent deviation or collision.

[0030] Specifically, the base shell 11 is formed into a circular base with a chamfered edge through injection molding, and an internal cavity 113 is provided for mounting the swing pointer 2. The cover 12 is connected to the base shell 11 by snaps or screws, covering the opening of the cavity 113 to form a closed space. The swing pointer 2 is constrained within the cavity 113, and its swing trajectory is limited by the side wall of the cavity, avoiding measurement deviation caused by external contact. During operation, the transparency of the cover 12 allows direct observation of pointer position changes, and the separate design of the base shell 11 and cover 12 facilitates disassembly for maintenance or calibration of pointer accuracy.

[0031] As a preferred embodiment, such as Figure 3 and Figure 4As shown, the bottom of the base shell 11 is provided with a mounting platform 115, and a pin 116 is provided on the mounting platform 115. The swing pointer 2 is rotatably mounted on the pin 116.

[0032] In this embodiment, the mounting platform 115 is a support structure located at the bottom of the base shell 11 to support the pin 116. It can be made of metal or high-strength plastic and formed into a fixed platform through injection molding or machining. Its function is to provide stable support for the pin 116 and prevent the swing pointer 2 from deviating during rotation. The pin 116 is a cylindrical shaft vertically fixed to the mounting platform 115. It can be made of stainless steel or aluminum alloy and fixed to the mounting platform 115 by threaded connection or welding. Its function is to serve as the rotation center of the swing pointer 2, ensuring the stability of the pointer's swing trajectory. The center hole of the swing pointer 2 and the pin 116 are engaged by a bearing, allowing the swing pointer 2 to swing freely while reducing measurement errors caused by friction.

[0033] Specifically, the mounting platform 115 and the bottom of the base shell 11 are fixedly connected by integral molding or separate assembly. The pin 116 is vertically fixed to the surface of the mounting platform 115, and the center hole of the swing pointer 2 is fitted onto the pin 116. When the measuring instrument contacts the inner ring of the lens, the swing pointer 2 rotates around the pin 116 under the action of gravity until the tip of the swing pointer 2 points to the corresponding scale. At this time, the deflection angle of the pointer can be directly read through the scale on the housing 1. Since the pin 116 and the mounting platform 115 form a rigid support structure, the rotation axis of the pointer remains fixed during the swing, avoiding the distortion of measurement data due to the shaking of the support structure.

[0034] Furthermore, such as Figure 3 and Figure 4 As shown, the swing pointer 2 includes a pointer part 21 and a swing part 22. The swing part 22 is located below the pointer part 21 and is integrally formed with the pointer part 21.

[0035] The pointer section 21 is a slender component used to indicate angles, and its tapered tip improves the pointing accuracy of the angle scale. The swing section 22 is a counterweight component that provides gravitational balance. Specifically, it can be implemented by connecting a crescent-shaped metal block to the pointer section 21. The crescent-shaped structure increases the swing inertia to improve measurement stability.

[0036] During measurement, when the housing 1 contacts the curved surface of the lens, the swing part 22, under the influence of gravity, drives the pointer part 21 to rotate around the pin 116. Since the swing part 22 and the pointer part 21 are integrally molded, their movement trajectories are completely synchronized, avoiding the lag or offset that might occur with separate connections. The inertial torque generated by the crescent-shaped swing part 22 allows the pointer to quickly stabilize at its equilibrium position, and the conical pointer tip can precisely align with the scale line on the edge of the housing 1, thereby accurately reading the inner ring tilt angle value of the lens.

[0037] Furthermore, the pointer part 21 is mounted on the pin 116.

[0038] Specifically, the bottom of the mounting platform 115 has a pre-machined raised platform with a threaded hole, and the bottom end of the pin 116 is machined with an external thread and screwed into the threaded hole of the mounting platform 115 to form a fixed support shaft perpendicular to the housing 1. The end of the pointer part 21 has a through hole and is sleeved on the outer wall of the pin 116. The inner diameter of the through hole is slightly larger than the diameter of the pin 116 to form a clearance fit, allowing the pointer part 21 to swing freely around the pin 116. When the measuring instrument contacts the curved surface of the lens, the pointer part 21 naturally droops under the action of gravity, and the swing angle is directly read through the scale on the edge of the housing 1.

[0039] To ensure that the pointer swing angle is within a certain range and to prevent measurement angle distortion, such as Figure 3 and Figure 4 As shown, the pointer part 21 is provided with limit posts 114 on both sides, and there is a preset gap between the pointer part 21 and the limit posts 114.

[0040] The limiting post 114 is a columnar structure fixed inside the housing 1 on both sides. It can be made of metal or rigid plastic and is used to limit the swing amplitude of the pointer 21. During measurement, the limiting post 114 prevents the pointer 21 from excessively deflecting by physically blocking it. The preset gap is the clearance distance between the limiting post 114 and the side of the pointer 21. This clearance can be achieved by adjusting the installation position of the limiting post 114. This gap allows the pointer 21 to swing freely within the normal measurement range while avoiding direct contact with the limiting post 114 to prevent frictional resistance.

[0041] Specifically, when the oscillating pointer 2 deflects due to the curvature of the inner ring of the lens, the limiting post 114 forms a non-contact constraint through a preset gap. During measurement, the oscillation amplitude of the pointer 21 is limited to the range allowed by the preset gap, thereby avoiding measurement errors caused by excessive oscillation and preventing wear of parts caused by mechanical collisions. When the tilt angle of the inner ring of the lens changes, the pointer 21 maintains a stable oscillation state within the gap range of the limiting post 114, ensuring the repeatability of the measurement data.

[0042] In a preferred embodiment, the bottom shell 11 includes a cut-edge portion 117 and a non-cut-edge portion 118, with a protrusion 111 located in the non-cut-edge portion 118, and the accommodating cavity 113 having a circular structure with a cut-edge structure.

[0043] The chamfered portion 117 is the part of the base shell 11 where a straight edge is cut. Specifically, this can be achieved by machining one side of the circular shell 1 into a flat surface, used to form a stable contact with the edge of the temple when measuring the levelness of the temple. The unchamfered portion 118 is the uncut, rounded edge of the base shell 11, which can be achieved by preserving the original circular outline. It serves to support the protrusion 111 and maintain the overall structural strength of the shell 1. The protrusion 111 is a localized protrusion structure located on the edge of the unchamfered portion 118, preferably integrally formed with the base shell 11, used to form multi-point contact with the inner ring of the lens to limit the offset of the measuring instrument.

[0044] Specifically, the chamfered edge 117 of the base shell 11 is aligned with the top of the temple through a straight edge, and the arc structure of the non-chamfered edge 118 conforms to the curvature of the inner ring of the lens. The protrusions 111 are evenly distributed on the edge of the non-chamfered edge 118 to form multiple contact fulcrums. When the measuring instrument is attached to the lens, the protrusions 111 contact the inner ring of the lens to form a positioning reference, and the swing pointer 2 swings freely to the equilibrium position under the action of gravity. At this time, the scale value pointed to by the tip of the pointer is the inner ring tilt angle.

[0045] In a preferred embodiment, the spectacle lens inclination measuring instrument includes six protrusions 111, which are equidistantly disposed on the edge of the non-cut edge portion 118, such as... Figure 1-4 As shown.

[0046] The six protrusions 111 are equidistantly positioned at the edge along the edge of the non-cut edge 118 at the same interval. Specifically, this can be achieved by uniformly positioning the installation position after calculating the circumferential angle, ensuring the symmetrical distribution of the protrusions 111 and avoiding errors caused by uneven distribution of contact points during measurement.

[0047] Specifically, the edge of the non-cut edge portion 118 is divided into equally divided regions, with a protrusion 111 set in each region, forming a ring-shaped group of contact points. When the measuring instrument is placed on the inner ring of the lens, two of the protrusions 111 simultaneously contact the edge of the inner ring of the lens, and the deflection angle of the swing pointer 2 reflects the tilt angle of the inner ring. Because the protrusions 111 are arranged in pairs, the inner ring of the lens is subjected to uniform force, and the swing amplitude of the swing pointer 2 is determined only by the tilt angle, avoiding measurement deviations caused by contact point offsets.

[0048] In some specific embodiments, the bump 111 may be wrapped with an elastic material to increase friction and further prevent the instrument from sliding during the measurement process.

[0049] The spectacle lens inner ring tilt measuring instrument of this utility model is shaped like an owl, with a novel structure that improves measurement accuracy while also enhancing its appearance.

[0050] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A spectacle lens inner ring inclination measuring instrument, characterized in that, The device includes a housing and a swing pointer. The housing has a round structure with a chamfered edge. The swing pointer is swingably mounted inside the housing. The edge of the housing is provided with a pair of protrusions. The pair of protrusions are located on the same side of the housing at a preset distance apart, and there is a recess between the protrusions.

2. The spectacle lens inner ring inclination measuring instrument according to claim 1, characterized in that, The housing includes a bottom shell and a cover. The bottom shell has a receiving cavity, the swing pointer is installed in the receiving cavity, and the cover is disposed on the receiving cavity.

3. The spectacle lens inner ring inclination measuring instrument according to claim 2, characterized in that, The bottom of the base shell is provided with a mounting platform, and a pin is provided on the mounting platform. The swing pointer is rotatably mounted on the pin.

4. The spectacle lens inner ring inclination measuring instrument according to claim 3, characterized in that, The swinging pointer includes a pointer part and a swinging part, wherein the swinging part is located below the pointer part and is integrally formed with the pointer part.

5. The spectacle lens inner ring inclination measuring instrument according to claim 4, characterized in that, The pointer part has a conical structure, and the swinging part has a crescent-shaped mechanism.

6. The spectacle lens inner ring inclination measuring instrument according to claim 4, characterized in that, The pointer is mounted on the pin.

7. The spectacle lens inner ring inclination measuring instrument according to claim 4, characterized in that, The pointer part is provided with limiting posts on both sides, and there is a preset gap between the pointer part and the limiting posts.

8. The spectacle lens inner ring inclination measuring instrument according to any one of claims 2-7, characterized in that, The bottom shell includes a cut-edge portion and a non-cut-edge portion, the protrusion is located in the non-cut-edge portion, and the accommodating cavity has a circular structure with a cut-edge structure.

9. The spectacle lens inner ring inclination measuring instrument according to claim 8, characterized in that, The bumps include six, and the bumps are equidistantly disposed on the edge of the non-cut edge portion.

10. The spectacle lens inner ring inclination measuring instrument according to claim 2, characterized in that, The cover is transparent.

11. The spectacle lens inner ring inclination measuring instrument according to claim 1, characterized in that, The lens inner ring tilt measuring instrument is shaped like an owl.

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