CN211652026U - Limiting device for metrological verification and lensmeter support - Google Patents

Abstract

The utility model provides a limiting device and a lensmeter support for metrological verification, which comprises a base, wherein the middle part of the base is provided with a round hole, and the upper surface is provided with a circle of grooves; the base is connected with the lensmeter support, the lensmeter support comprises a circular table part arranged at the lower part and a cylindrical part arranged at the upper part, the cylindrical part is arranged below the base, and the cylindrical part penetrates through the circular hole of the base and extends out of the upper part of the base; the coaming is arranged on the base and is arranged in the groove; wherein, the optometry lens is placed at the top of lensometer support, the inner wall of bounding wall with the external diameter phase-match of optometry lens makes the optometry lens is injectd in the bounding wall, and its optometry lens geometric centre is located the geometric center department of lensometer support.

Description

Limiting device for metrological verification and lensmeter support

Technical Field

The utility model relates to a stop device and lensmeter support for metrological verification belongs to the optometry equipment field.

Background

The optometry lens box is a combination of various optometry lenses, is an ophthalmologic measuring instrument for checking the refraction state of human eyes, strabismus, amblyopia and other visual functions of the human eyes, and generally uses a first-level lensometer to carry out measurement and verification. The optical center displacement of the spherical and cylindrical optometric lenses is required to be verified in the current metrological verification regulation JJJG 579-. For the method for detecting the displacement of the optical center of the spherical lens, the specification also refers to that the lens is required to be rotated slightly to ensure that the prism degree in the vertical direction is zero; for the method for detecting the optical center displacement of the cylindrical lens, the prism degree indication value obtained in the direction of 0-180 degrees is referred to, namely the optical center displacement of the cylindrical lens optometry lens.

In actual verification work, the above operations are often performed by an inspector who moves and rotates the lens by hand through experience, and determines the position and direction of the lens to be placed when reading the measurement result by eye force. Therefore, the measurement result is greatly influenced by the subjectivity of experimenters, and the operation is not easy and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides a stop device for metrological verification, the position of optometry lens can be injectd to the bounding wall, makes optometry lens geometric centre be located the geometric centre department of lensometer support to the bounding wall can be dismantled.

In order to realize above utility model purpose, the utility model discloses an aspect provides a stop device for metrological verification, include:

the middle part of the base is provided with a round hole, and the upper surface of the base is provided with a circle of grooves; and

the coaming is arranged on the base and is detachably arranged in the groove;

wherein, the top of lensometer support is used for placing the optometry lens when examining, the inner wall of bounding wall with the external diameter phase-match of optometry lens makes the optometry lens is injectd in the bounding wall, and its optometry lens geometric center is located the geometric center department of lensometer support.

The utility model is further improved in that the coaming comprises an annular baffle plate which can cover the groove, a lower cylinder is arranged below the annular baffle plate, and an upper cylinder is arranged above the annular baffle plate; the lower cylinder is inserted in the groove, and the inner diameter of the lower cylinder is matched with that of the groove.

The utility model discloses a further improvement lies in, the quantity of bounding wall is a plurality of, and is different the optometry lens of bounding wall adaptation different grade type.

The utility model has the further improvement that the coaming is provided with a notch for installing a handle of the optometry lens; the coaming can rotate together with the optometry lens under the action of external force.

The utility model has the further improvement that the height of the baffle of the coaming and the upper cylinder is not less than the sum of the part of the lensometer support extending out of the base and the half of the central thickness of the convex lens with the maximum thickness in the optometry lens;

the height of the round hole of the base is such that the height of the lensmeter support above the base part is greater than half of the edge thickness of the thickest concave lens in the prescription lens.

In another aspect of the present invention, a lensmeter support is further provided, which comprises a support main body and the limiting device for metrological verification;

the holder body comprises a holder housing and an internal component disposed within the holder housing; the support shell comprises a circular table part arranged at the lower part and a cylindrical part arranged at the upper part, and the cylindrical part is connected with the limiting device for metrological verification;

wherein the cylindrical part passes through the round hole of the base and extends out of the upper part of the base.

The utility model discloses a further improvement lies in, the lower part of base is provided with the draw-in groove of the round platform shape of indent, the concave surface of draw-in groove with the upper surface of the round platform portion of lensmeter support cooperatees.

The utility model discloses a further improvement lies in, the base with link to each other through the adhesive between the support shell.

The utility model discloses a further improvement lies in, the base with the support shell is made as an organic whole.

The utility model is further improved in that the groove is formed by uniformly arranging a circular ring shape or a plurality of arcs; a gap is formed between the inner diameter of the lower cylinder of the enclosing plate and the inner diameter of the groove.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a stop device for metrological verification, it sets up and links to each other or makes to be a holistic base with the support main part, is provided with the bounding wall on the base, and the position of optometry lens can be injectd to the bounding wall, makes optometry lens geometric center be located the geometric center department of lensometer support. In order to adapt to the optometry lenses with different outer ring diameters, only the proper enclosing plate needs to be replaced, other complex operations are not needed, and the influence caused by complex operations on the focusing meter and verification work is reduced.

The utility model discloses a stop device for metrological verification, bounding wall and base can dismantle continuous, other examination items of optometry lens, like the focal power etc. can't restrict the position at lens geometric center, only need when examining and determine these items take off the bounding wall can.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a limiting device for metrological verification according to an embodiment of the present invention, showing the structure of a base;

fig. 2 is a schematic top view of a base according to an embodiment of the present invention, showing a structure provided with a slot;

fig. 3 is a schematic cross-sectional view of a base according to an embodiment of the present invention, showing a structure provided with a slot;

FIG. 4 is a perspective schematic view of a base according to an embodiment of the present invention, showing a structure provided with an adhesive;

FIG. 5 is a schematic cross-sectional view of a base according to an embodiment of the present invention, showing a structure provided with an adhesive;

fig. 6 is a perspective schematic view of a panel according to an embodiment of the present invention;

fig. 7 is a schematic top view of a shroud according to an embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of a shroud according to an embodiment of the present invention;

fig. 9 is a schematic view illustrating a connection structure between the surrounding plate and the base according to an embodiment of the present invention;

fig. 10 is a schematic view of a coupling mechanism of a base and a lensmeter support according to an embodiment of the invention, showing a configuration with a slot;

FIG. 11 is a schematic view of the coupling mechanism of the base and the lensmeter support of one embodiment of the present invention, showing a configuration in which an adhesive is provided;

fig. 12 is a schematic view of the coupling mechanism between the base and the lensmeter support according to an embodiment of the present invention, showing the base and the support housing being fabricated as a unitary structure.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

The meaning of the reference symbols in the drawings is as follows: 1. the optical lens comprises a base, 2, a lens meter support, 3, a coaming, 11, round holes, 12, a groove, 13, a clamping groove, 21, a cylindrical portion, 22, a circular table portion, 31, a baffle, 32, an upper cylinder, 33, a lower cylinder, 34 and a notch.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the following description is made in further detail with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

Fig. 1 schematically shows a stop device for metrological verification according to an embodiment of the present invention, which includes a base 1, the base 1 is a cylindrical structure, and may also be a square or other column or plate-shaped structure, and is used for fixing with a lensmeter support 2 and supporting a bounding wall 3. The center of base 1 is provided with round hole 11, and the upper surface is provided with recess 12, and recess 12 is circular duplex winding round hole 11 sets up a week. The lensmeter support 2 is connected with the base 1 and is sleeved with the base 1. A coaming 3 is arranged on the base 1, and the coaming 3 is detachably arranged in the groove 12.

A lensometer is an instrument for measuring the power of the vertex, the prism of ophthalmic lenses, including contact lenses, and is capable of determining the optical center, the axis, and printed marks of the lenses, checking whether the lenses are properly mounted in the frame. The lensmeter support 2 is a part of the lensmeter and is used for placing a lens to be measured and a support with a clear aperture. The limiting device for metrological verification described in this embodiment is part of or removably mounted on the lensmeter mount 2.

Prescription lenses are lenses that are mounted in a frame for use in determining refractive error of the eye. In practical applications, the combination of various types of prescription lenses is called a prescription lens box. The multifunctional lens mainly comprises positive and negative spherical lens optometry lenses, positive and negative cylindrical lens optometry lenses, prism optometry lenses, auxiliary optometry lenses and the like.

Wherein, the top of lensometer support 2 is used for placing the optometry lens, the inner wall of bounding wall 3 with the external diameter phase-match of optometry lens makes the optometry lens is injectd in bounding wall 3, and its optometry lens geometric center is located the geometric center department of lensometer support 2.

In the stopper device for metrological verification according to the present embodiment, the position of the prescription lens can be defined by the mount 1 and the apron 3. When the displacement of the optical center of the optometric lens is verified, the geometric center of the optometric lens to be tested is positioned at the geometric center of the lens holder. In the operation process of verifying the displacement of the optical center of the optometry lens, when the to-be-verified optometry lens is rotated, the geometric center of the optometry lens is always kept at the geometric center of the lens support. I.e. the prescription lens is only rotated in a plane and is prevented from moving in a horizontal or vertical direction. The fixed mode through bounding wall 3 can reduce the sleeve atress that makes the vertical direction of lens support, and then causes the disturbance to its inside optical element, influences the lensmeter function. The coaming 3 is detachably arranged in the groove 12, and other verification items of the optometry lens, such as the vertex power and the like, can not limit the position of the geometric center of the lens, and only the coaming needs to be removed when the items are verified.

In a preferred embodiment, as shown in fig. 6 and 7, the enclosing plate 3 comprises an annular baffle 31, and the annular baffle 31 is of a circular ring structure, has a width larger than that of the groove 12, and can cover the groove 12. A lower cylinder 33 is arranged below the annular baffle plate 31, and an upper cylinder 32 is arranged above the annular baffle plate 31. The length of the lower cylinder 33 is smaller than the depth of the groove 12, and when the lower cylinder 33 is installed, the lower cylinder 33 is inserted into the groove 12, and the inner diameter of the lower cylinder 33 is matched with the inner diameter of the groove 12. After installation, the lower cylinder 33 is clamped inside the recess 12.

In a preferred embodiment, as shown in fig. 8 and 9, the number of the enclosing plates 3 is multiple, and in general, different enclosing plates 3 are adapted to different types of prescription lenses. The prescription lenses are different in size due to manufacturing errors, wear, or other causes, and are classified into a plurality of types according to the size thereof. One said enclosure 3 for each type of prescription lenses.

In one embodiment, as shown in fig. 7, the shroud 3 is provided with a notch 34 for mounting a handle of the prescription lens. When the handle is snapped into the notch 34 in the shroud 3, the geometric center of the prescription lens is exactly at the geometric center of the lens holder. The coaming 3 can rotate with the optometry lens is together, and when the operation, the coaming 3 can rotate along with the rotation of optometry lens, also can operate the coaming 3 and rotate and drive the rotation of optometry lens. As shown in fig. 10, the shroud 3 is designed as a C-shaped shroud 3, and only the upper cylinder 32 may be a C-shaped structure having a notch 34.

In a preferred embodiment, as shown in fig. 9, the height of the baffle 31 and the upper cylinder 32 of the enclosure 3 is not less than the sum of the portion of the lensometer holder 2 extending above the base 1 and half of the central thickness of the thickest of all the lenses of the prescription lenses, so as to ensure that all the lenses to be tested can be placed in the enclosure 3 during testing. In this embodiment, the height of the circular hole 11 of the base 1 is such that the height of the portion of the lensmeter holder 2 higher than the base 1 is greater than half of the thickness of the edge of the thickest concave lens in the prescription lens.

In this embodiment, the height that bounding wall 3 exceeds base 1 will satisfy and can be higher than the position of optometry lens edge to guarantee that the optometry lens can be in bounding wall 3. The upper surface and the lower surface of the convex lens are convex surfaces, and when the convex lens is placed at the upper end of the lensometer support, the height of the edge of the convex lens is equal to the thickness of the part of the lensometer support 2 higher than the base 1 plus the thickness of the lower convex surface of the convex lens (namely half of the central thickness of the convex lens). The height of the apron 3 is at least as high as the position of the edge of the convex lens. Therefore, the highest height of the surrounding plate 3 is required to satisfy the height of the edge of the thickest convex lens when the thickest convex lens is detected, namely, the height of the surrounding plate 3 is not less than the sum of the part of the lensometer support 2 extending above the base 1 and half of the central thickness of the thickest convex lens in all the convex lenses in the optometry glasses.

The concave lens is concave on both sides, and when the concave lens was placed in the upper end of lensometer support, because the edge of concave surface bends downwards down, the edge of concave lens was less than the top of lensometer support. Therefore, if the height of the lower concave surface of the concave lens (half of the height of the edge of the concave lens) is greater than the height of the portion of the lensmeter holder 2 higher than the base 1, the center of the concave lens does not contact the lensmeter holder 2, which affects the measurement result. In this embodiment, the height of the circular hole 11 of the base 1 needs to be relatively low, so as to satisfy the requirement that the higher part of the lensmeter support 2 is relatively long. Base 1 the height of round hole 11 is less than the height of the cylindric portion of lensometer support 2 and subtracts half of the marginal thickness of the thickest concave lens in the optometry lens to guarantee that all optometry lenses can be put and examine on the lensometer support and not raised and then influence the indicating value by the base.

According to another aspect of the present invention, there is also provided a lensmeter mount 2, as shown in fig. 10, 11 and 12, comprising the stop device for metrological verification and the mount body according to the above embodiment. The holder body includes an inner member and a holder housing. The support housing comprises a circular table part 22 arranged at the lower part and a cylindrical part 21 arranged at the upper part, wherein the cylindrical part 21 is arranged below the base 1, and the cylindrical part 21 passes through the round hole 11 of the base 1 and extends out to the upper part of the base 1. The coaming 3 is arranged above the base 1, and the coaming 3 is arranged in the groove 12.

In one embodiment, as shown in fig. 2 and 3, the lower portion of the base 1 is provided with a concave truncated cone-shaped locking groove 13, and the locking groove 13 is arranged below the circular hole 11 and is communicated with the circular hole 11. The concave surface of the clamping groove 13 is matched with the upper surface of the circular table part 22 of the lensmeter support 2. In this embodiment, as shown in fig. 10, a circular hole 11 is formed in the center of the base 1, the circular hole 11 is used for sleeving the base 1 on a lens support of a lensometer, and the diameter of the circular hole 11 should be the same as the bottom diameter of the cylindrical portion 21 of the support, so as to ensure that the base 1 can be coaxial with the lens support after being sleeved on the lens support.

In the limiting device for metrological verification according to the embodiment, the lower surface of the base 1 is an inward concave truncated cone-shaped clamping groove 13 which has the same shape and size with the truncated cone part 22 at the lower part of the lensmeter support 2 and has an opposite direction, and the clamping groove is used for fixing the base 1 on the lensmeter after the base 1 is sleeved on the standard lensmeter support 2, so that the base 1 does not move in the horizontal direction in the verification process. The circle centers of the upper section circle and the lower section circle of the circular truncated cone are on the same axis with the center of the clamping groove and the circle center of the round hole 11. The circular radius of the upper section of the circular truncated cone is the same as the radius of the upper surface of the circular truncated cone of the first-level lensometer support 2, the included angle between the bus and the axis of the circular truncated cone is the same as the included angle between the bus and the axis of the circular truncated cone and the included angle between the bus and the axis of the circular truncated cone 22 of the lensometer support 2, and therefore the lower surface of the base 1 can be attached to the upper surface of the circular truncated cone 22 together, and the base 1 is fixed and cannot move in the horizontal. The round hole 11 on the upper surface of the base 1 penetrates through the truncated cone-shaped upper section on the lower surface of the base 1.

In one embodiment, the base 1 is attached to the holder housing by an adhesive, as shown at 11. The specific assembly method is as follows: the base 1 is disposed above the circular table portion 22 and supported by the upper surface of the circular table portion 22, and the top surface of the circular table is connected to the bottom surface of the base 1 by an adhesive.

In another embodiment, as shown in fig. 12, the base 1 is made integral with the holder housing at the time of manufacture.

In the device according to the embodiment, the round hole 11 of the base 1 can be fixedly connected with the lensmeter support 2 by an adhesion mode or an integrated mode, and the base 1 is prevented from moving in the horizontal direction.

In one embodiment, the groove 12 is formed by a circular ring shape or a plurality of arc-shaped grooves which are uniformly arranged. In one embodiment, there is a clearance between the inner diameter of the lower cylinder 33 of the shroud 3 and the inner diameter of the recess 12. The gap can guarantee the bounding wall 3 with can stabilize between the base 1, can not rock at will to can guarantee that the bounding wall 3 can rotate on base 1.

In a specific embodiment, the inner diameters of the manufactured enclosing plates are 38.2mm, 38.1mm, 38.0mm, 37.9mm and 37.8mm respectively. When in use, the corresponding coaming 3 is selected according to the detected optometry lens and is arranged in the groove 12. When installed, the shroud 3 captures the groove 12, and the width of the sides of the baffle 31 is such that it covers the groove 12 and does not interfere with the function of the device.

The coaming 3 which is suitable for the diameter of the outer ring of the tested lens is selected to be inserted into the groove 12 of the base 1, and at the moment, the coaming 3 can generate relative motion with the groove 12 of the base 1 under the action of external force, namely, slide in the groove 12. The tested lens is placed on the lensometer support 2 in the coaming 3, the handle of the tested lens falls into the gap 34 of the coaming 3, and the geometric center of the lens is just right at the geometric center of the lensometer support 2.

Rotate the lens according to the regulation requirement, in the breach of bounding wall 3 of the joint of the handle of optometry lens, make it rotate with bounding wall 3 together. Because the groove 12 limits the apron 3 to only rotate within the groove, the lens is also limited within the apron 3 and cannot move horizontally, but only rotate. This ensures that the geometric centre of the lens is located at the geometric centre of the abutment during rotation. And when the position of the optometry lens, at which the vertical direction prism power of the standard lensometer is zero, is found, reading the horizontal direction prism power, namely the optical center displacement of the optometry lens.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.

Claims (10)

1. A stop device for metrological verification, comprising:

the device comprises a base (1), wherein a round hole (11) is formed in the middle of the base (1), and a circle of groove (12) is formed in the upper surface of the base; and

the coaming (3) is arranged on the base (1), and the coaming (3) is detachably arranged in the groove (12);

wherein, the top of lensometer support (2) is used for placing the optometry lens when examining, the inner wall of bounding wall (3) with the external diameter phase-match of optometry lens makes the optometry lens is injectd in bounding wall (3), and its optometry lens geometric centre is located the geometric center department of lensometer support (2).

2. The spacing device for metrological verification as claimed in claim 1, characterized in that said skirt (3) comprises an annular baffle (31) able to cover said groove (12), a lower cylinder (33) being arranged below said annular baffle (31), an upper cylinder (32) being arranged above said annular baffle (31); the lower cylinder (33) is inserted into the groove (12), and the inner diameter of the lower cylinder (33) is matched with that of the groove (12).

3. Stop device for metrological verification as claimed in claim 2, characterized in that said collar (3) is in a plurality, different said collars (3) being adapted to different types of prescription lenses.

4. A stop device for metrological verification as claimed in claim 3 wherein the shroud (3) is provided with a notch (34) for mounting a handle of the prescription lens; the coaming (3) can rotate together with the optometry lens under the action of external force.

5. The spacing device for metrological verification as claimed in claim 4, characterized in that the height of the baffle (31) and upper cylinder (32) of the apron (3) is not less than the sum of the portion of the lensometer holder (2) projecting above the base (1) and half of the central thickness of the thickest convex lens of the prescription lenses;

the height of the round hole (11) of the base (1) is enough to enable the height of the part, higher than the base (1), of the lensmeter support (2) to be greater than half of the edge thickness of the thickest concave lens in the optometry lens.

6. A lensmeter mount comprising a mount body and a stop for metrological verification as claimed in any one of claims 1 to 5;

the holder body comprises a holder housing and an internal component disposed within the holder housing; the support shell comprises a circular table part (22) arranged at the lower part and a cylindrical part (21) arranged at the upper part, and the cylindrical part (21) is connected with the limiting device for metrological verification;

wherein the cylindrical part (21) passes through the round hole (11) of the base (1) and extends out of the upper part of the base (1).

7. The lensmeter support according to claim 6, wherein the lower part of the base (1) is provided with an inward-concave truncated cone-shaped clamping groove (13), and the concave surface of the clamping groove (13) is matched with the upper surface of the truncated cone part (22) of the lensmeter support (2).

8. The lensmeter holder of claim 6, wherein the base (1) is attached to the holder housing by an adhesive.

9. The lensmeter holder of claim 6, wherein the base (1) is manufactured as one piece with the holder housing.

10. The lensmeter support according to any of claims 7-9, wherein the recess (12) is circular or has a plurality of arcs arranged uniformly; and a gap is reserved between the inner diameter of the lower cylinder of the enclosing plate (3) and the inner diameter of the groove (12).

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