CN212300194U - Dial indicator centering measurement checking fixture for detecting center thickness of biconcave lens or plano-concave lens - Google Patents
Dial indicator centering measurement checking fixture for detecting center thickness of biconcave lens or plano-concave lens Download PDFInfo
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- CN212300194U CN212300194U CN202021024181.9U CN202021024181U CN212300194U CN 212300194 U CN212300194 U CN 212300194U CN 202021024181 U CN202021024181 U CN 202021024181U CN 212300194 U CN212300194 U CN 212300194U
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Abstract
The utility model relates to a detect percentage table centering measurement of biconcave lens or plano-concave lens center thickness and examine utensil installs on the percentage table, and this percentage table includes the support and installs the dial plate on this support, be equipped with the measurement gauge outfit that is used for measuring the lens center thickness that awaits measuring in the dial plate, the outer tip of this measurement gauge outfit vertically stretches out the dial plate bottom outside downwards. The utility model discloses an overcome and adopted two sharp measuring gauge outfit during current lens's that awaits measuring center thickness that detects, be difficult for finding the central point, center thickness measurement error value is too big, and produce the scar on the lens surface easily, influence the shortcoming of pleasing to the eye etc, it is installed under the measuring gauge outfit of percentage table dial plate, cup joint the outer bearing and the inner bearing that the cooperation was used including the activity, can help measuring the quick accurate lens central point that awaits measuring of gauge outfit and detect, can not only effectively reduce the lens (biconcave lens DCV, plano-concave lens PCV) center thickness measurement's of awaiting measuring error value, and can avoid producing the scar on the lens surface simultaneously.
Description
Technical Field
The utility model relates to a detect percentage table centering measurement of biconcave lens or plano-concave lens center thickness and examine utensil uses and detects at lens center thickness.
Background
In the field of lenses at present, lens structures are divided into five types, namely a double concave lens DCV, a double convex lens DCX, a plano-concave lens PCV, a plano-convex lens PCX and a meniscus lens MNL. The dial plate used by the dial indicator measuring tool corresponding to the thickness of the measuring center in the industry at the present stage has two types, namely a double-flat dial plate and a double-pointed dial plate. A double flat dial is used for measuring the biconvex lens and the plano-convex lens, and a double pointed dial is used for measuring the biconcave lens DCV, the plano-concave lens PCV, and the meniscus lens MNL (as shown in fig. 1, the two dials of the double pointed dial are coaxially opposite and spaced apart). When the central thickness of the double convex lens DCX and the central thickness of the plane convex lens PCX are detected, the highest point of the lens is found by using a double planometer disc with flat heads at the upper part and the lower part, the measurement can be directly carried out, the measurement process is stable, and the measurement error of the method is within 0.002 mm. However, the double-tip dial used in detecting the central thickness of the double-concave lens DCV, the plano-concave lens PCV and the meniscus lens MNL needs to find the lowest point of the lens, but because the lens has at least one surface with an R value, the central point is not easy to find in measurement, an error of 0.005-0.015mm is easy to generate, and the error is seriously beyond the standard of an error within 0.002mm in the industry, and finally, an effect deviation can be generated on the lens imaging of the terminal. Only some old staff with more than three years of experience have small errors in measurement, but also have certain instability. On the other hand, when the center point is found, the dial can move left and right on the lens, so that the surface of the lens is easy to be scratched, and the bad appearance is increased. Therefore, it is desirable to provide a dial indicator centering measurement gauge for detecting the center thickness of a bi-concave lens or a plano-concave lens, which has a simple structure, can effectively reduce the error value of measuring the center thickness of a lens to be measured (a bi-concave lens DCV, a plano-concave lens PCV), and can avoid scratches on the surface of the lens.
SUMMERY OF THE UTILITY MODEL
Adopt two sharp measurement gauge outfits during the central thickness in order to overcome current lens (biconcave lens DCV, planoconcave lens PCV) that awaits measuring, be difficult for finding the central point, central thickness measurement error value is too big, and produce the scar on the lens surface easily, influence pleasing to the eye shortcoming of waiting etc, the utility model provides a detect the dial indicator centering measurement of biconcave lens or planoconcave lens central thickness and examine utensil, it installs under the measurement gauge outfit of dial indicator dial plate, cup joint outer bearing and the inner bearing that the cooperation was used including the activity, can help measuring the quick accurate alignment of gauge outfit and await measuring lens central point and detect, can not only effectively reduce the lens (biconcave lens DCV, planoconcave lens PCV) central thickness measurement's of awaiting measuring error value, can avoid producing the scar on the lens surface simultaneously moreover.
The technical scheme of the utility model as follows:
a dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens is used for being installed on a dial indicator, the dial indicator comprises a support and a dial plate installed on the support, a measurement gauge head for measuring the center thickness of the lens to be measured is arranged at the bottom of the dial plate, the lower end part of the measurement gauge head vertically extends downwards to the bottom end of the dial plate, and the lens to be measured is the biconcave lens or the plano-concave lens; the dial indicator centering measurement checking fixture is arranged on the support right below the measuring gauge head and keeps a gap with the measuring gauge head; the dial indicator centering measurement detection tool comprises an inner bearing seat used for bearing the lens to be detected and an outer bearing seat used for fixing the inner bearing seat on the support;
the inner bearing seat is in a two-layer stepped shaft shape and comprises a supporting part and a positioning part, wherein the supporting part is sequentially and coaxially overlapped up and down and is used for supporting the lens to be tested, and the positioning part is used for fixing the supporting part on the outer bearing seat;
the outer bearing seat comprises a sleeve joint cylinder, a positioning base and at least 2 positioning walls, the sleeve joint cylinder is of a hollow cylindrical structure with an opening at the upper end and a closed lower end, the top of the positioning base is connected below the bottom of the sleeve joint cylinder, and the outer bearing seat is movably arranged on the support through the positioning base; the positioning wall spacing ring is arranged on the edge of the top end of the sleeve joint barrel, and each positioning wall extends towards the upper part of the sleeve joint barrel along the direction parallel to the central shaft of the sleeve joint barrel;
the positioning part is coaxially and movably inserted in the inner cavity of the sleeve joint barrel, and the outer diameter of the positioning part is adapted to the inner diameter of the sleeve joint barrel; the top surface of the supporting part is higher than the top surface of the sleeve joint barrel and lower than the top surface of the positioning wall; one surface of each positioning wall facing the center of the sleeve is a cambered surface which is matched with the shape of the outer peripheral wall of the lens to be detected and is coaxial with the center of the sleeve, and the distance from the cambered surface to the central shaft of the sleeve is equal to the radius of the lens to be detected; the central shafts of the sleeve joint cylinder and the inner bearing seat which are arranged in place on the support are coaxial with the central shaft of the measuring gauge outfit.
The utility model provides a detect percentage table centering measurement of biconcave lens or plano-concave lens center thickness examines utensil, install under the percentage table measurement gauge outfit and leave spaced position between the gauge outfit with the percentage table measurement gauge outfit, outer bearing and the inner bearing cooperation through the activity cup joint, when detaining one side concave surface of the lens that awaits measuring at the supporting part top surface, spacing through the location wall enables the center pin of the lens that awaits measuring and the center pin of a sleeve joint section of thick bamboo to align fast and fix a position, can help the measurement gauge outfit to aim at the lens central point that awaits measuring fast accurately and detect, the cooperation is measured the contrast of accurate standard lens in advance, can realize the short-term test to the lens center thickness that awaits measuring, can not only effectively reduce the error value of measurement, simultaneously still can avoid producing the scar on the. In addition, the positioning wall can prevent the lens to be measured from slipping off the inner bearing seat.
The specific application method is as follows:
adjusting the zero rule:
firstly, a standard lens with the same shape and structure as the lens to be measured is selected as a gauge piece. Firstly, measuring the central thickness of the gauge piece by using a digital display dial indicator, namely, taking the central thickness as the gauge thickness of the lens. Then the gauge piece is placed into the dial indicator centering measurement gauge which needs to be calibrated and is installed, the central shaft of the gauge piece and the central shaft of the sleeve joint barrel are aligned and positioned quickly through the positioning wall, the measurement gauge head is lowered, when the outer end part of the gauge head to be measured abuts against the center of the top surface of the gauge piece at the moment, the pointer of the dial plate stops rotating, the scale of the dial plate pointer is adjusted to the scale position with the same thickness reading as the center of the gauge piece measured by the digital display dial indicator, and the gauge zero is completed.
(II) measuring the central thickness of the lens to be measured:
the measuring gauge head is lifted, the gauge piece is taken out, the lens to be measured is placed in the centering measurement gauge of the dial indicator (note that the upper and lower placing surfaces of the lens to be measured are the same as the surfaces of the lens to be measured when the gauge piece is placed in the gauge time so as to ensure that the positioning error of the measuring tool during measurement is within a range), the measuring gauge head is lowered, and when the lower end part of the measuring gauge head abuts against the center of the top surface of the lens to be measured at the moment, the reading of the center thickness of the lens to be measured can be realized.
The number of the positioning walls is 2.
The preferred number of locating walls not only saves cost and process, but also has the highest efficiency of taking and placing operations.
The positioning part and the supporting part are formed by coaxial cylinders, the diameter of the positioning part is equal to the outer diameter of the lens to be measured, and the outer diameter of the supporting part is smaller than that of the positioning part.
This preference simplifies the manufacturing process of the outer bearing.
The top surface of the supporting part is 1.5-2.5mm higher than the top surface of the sleeve joint barrel.
The distance between the top surface of the supporting part and the top surface of the sleeve joint barrel is preferably suitable for most of lenses with concave surfaces on the market at present, and a certain gap can be kept between the lens to be measured and the top surface of the sleeve joint barrel.
The top surface of the supporting part is higher than the top surface of the sleeve joint barrel and preferably 2 mm.
The preferred height difference is most suitable for most of the lenses to be measured on the market.
The diameter of the supporting part is 75-85% of the outer diameter of the lens to be measured.
The preferred diameter of the support portion is such that it fits most of the lenses currently on the market with a concave surface.
The outer bearing seat is made of metal materials, and the inner bearing seat is made of white plastic steel materials.
The outer bearing seat made of metal is not easy to deform and wear in the using process, the inner bearing seat made of white plastic steel is not easy to scratch a lens in the measuring process, and the inner bearing seat can be replaced and replaced newly after being worn without influencing the measuring accuracy.
Among them, the metal material is preferably copper or stainless steel.
The dial indicator centering measurement gauge for detecting the center thickness of the biconcave lens or the plano-concave lens further comprises a handle screw, one axial end of the handle screw can penetrate through the fixing hole and extend into the mounting hole, and the handle screw is matched and locked with the thread in the fixing hole through an external thread arranged at one axial end of the handle screw so as to fix the relative position of the outer bearing seat and the support.
Preferably, the fixing mode of the outer bearing seat is simple and easy to implement and is firmly connected.
Compared with the prior art, the utility model discloses the application has following advantage:
1) the dial indicator centering measurement gauge for detecting the center thickness of the biconcave lens or the plano-concave lens is arranged right below a dial indicator measurement gauge head and is matched with an inner bearing through an outer bearing and an inner bearing which are movably sleeved, when the concave surface of the lens to be detected is buckled on the top surface of a supporting part, and the central shaft of the lens to be detected and the central shaft of a sleeving barrel are quickly aligned and positioned through the limiting of a positioning wall, so that the detection gauge head can be helped to quickly and accurately align to the central point of the lens to be detected for detection, and the comparison of a standard lens which is accurately measured in advance is matched, so that the quick detection of the center thickness of the lens to be detected can be realized, the error value of measurement can be effectively reduced, and meanwhile;
2) the preferred number of positioning walls not only saves cost and working procedures, but also has the highest efficiency of taking and placing operations;
3) the diameter of the positioning part is equal to the outer diameter of the lens to be measured, so that the processing technology of the outer bearing seat can be simplified.
Drawings
FIG. 1 is a schematic diagram of a double-pointed dial structure of a prior dial indicator;
FIG. 2 is a schematic view of the dial indicator for measuring the center thickness of the bi-concave lens or the plano-concave lens according to the present invention;
fig. 3 is an assembly structure diagram of the dial indicator centering measurement checking fixture for detecting the center thickness of the biconcave lens or the plano-concave lens according to the present invention;
fig. 4 is a schematic structural view of an outer bearing seat of the dial indicator centering measurement inspection device for detecting the center thickness of the biconcave lens or the plano-concave lens according to the present invention;
fig. 5 is a schematic structural view of an inner bearing seat of the dial indicator centering measurement inspection device for detecting the center thickness of the biconcave lens or the plano-concave lens according to the present invention;
fig. 6 is a schematic diagram of the dial indicator centering measurement tool for detecting the center thickness of the biconcave lens or the plano-concave lens according to the present invention;
FIG. 7 is a cross-sectional view of FIG. 6;
fig. 8 is a top view of fig. 6.
Description of reference numerals:
the device comprises a measuring gauge outfit 1, an outer bearing seat 2, an inner bearing seat 3, a dial 4, a lens 5 to be measured, a handle screw 6, a support 7, a sleeve barrel 2-1, a positioning base 2-2, a positioning wall 2-3, a supporting part 3-1, a positioning part 3-2, a mounting hole 4-1 and a fixing hole 4-2.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings 1-8.
As shown in fig. 1-8, the utility model discloses a detect percentage table centering measurement of biconcave lens or plano-concave lens center thickness examines utensil for install on the percentage table, this percentage table includes support 7 and installs dial plate 4 on this support 7, dial plate 4 bottom is equipped with the measurement gauge outfit 1 that is used for measuring the lens 5 center thickness that awaits measuring, and the lower tip of this measurement gauge outfit 1 stretches out dial plate 4 bottom vertically downwards, lens 5 that awaits measuring is biconcave lens or plano-concave lens; the dial indicator centering measurement checking fixture is arranged on a support 7 right below the measuring gauge head 1 and keeps a gap with the measuring gauge head 1; the dial indicator centering measurement detection tool comprises an inner bearing seat 3 for bearing a lens 5 to be detected and an outer bearing seat 2 for fixing the inner bearing seat 3 on a support 7;
the inner bearing seat 3 is in a two-layer stepped shaft shape, and the inner bearing seat 3 comprises a supporting part 3-1 which is sequentially coaxially overlapped up and down and is used for supporting a lens to be tested and a positioning part 3-2 which is used for fixing the supporting part 3-1 on the outer bearing seat 2;
the outer bearing seat 2 comprises a sleeve joint barrel 2-1, a positioning base 2-2 and at least 2 positioning walls 2-3, the sleeve joint barrel 2-1 is of a hollow cylindrical structure with an opening at the upper end and a closed lower end, the top of the positioning base 2-2 is connected below the bottom of the sleeve joint barrel 2-1, and the outer bearing seat 2 is movably arranged on a support 7 through the positioning base 2-2; the positioning walls 2-3 are arranged at the edge of the top end of the sleeve barrel 2-1 in a spaced ring mode, and each positioning wall 2-3 extends towards the upper side of the sleeve barrel 2-1 along the direction parallel to the central shaft of the sleeve barrel 2-1;
the positioning part 3-2 is coaxially and movably inserted in the inner cavity of the sleeve joint barrel 2-1, and the outer diameter of the positioning part 3-2 is adapted to the inner diameter of the sleeve joint barrel 2-1; the top surface of the supporting part 3-1 is higher than the top surface of the sleeve joint barrel 2-1 and lower than the top surface of the positioning wall 2-3; one surface of each positioning wall 2-3 facing the center of the sleeve barrel 2-1 is a cambered surface which is matched with the shape of the outer peripheral wall of the lens 5 to be measured and is coaxial with the center of the sleeve barrel 2-1, and the distance from the cambered surface to the central shaft of the sleeve barrel 2-1 is equal to the radius of the lens 5 to be measured; the central shafts of the sleeve joint barrel 2-1 and the inner bearing seat 3 which are arranged in place on the support 7 are coaxial with the central shaft of the measuring gauge outfit 1.
The number of the positioning walls 2-3 is 2.
The positioning part 3-2 and the supporting part 3-1 are formed by coaxial cylinders, the diameter of the positioning part 3-2 is equal to the outer diameter of the lens 5 to be measured, and the outer diameter of the supporting part 3-1 is smaller than that of the positioning part 3-2.
The top surface of the supporting part 3-1 is 1.5-2.5mm higher than the top surface of the sleeve joint barrel 2-1.
The diameter of the supporting part 3-1 is 75-85% of the outer diameter of the lens 5 to be measured.
The outer bearing seat 2 is made of metal materials, and the inner bearing seat 3 is made of white plastic steel materials.
The bracket 7 is provided with a mounting hole 4-1 which is positioned under the measuring gauge outfit 1, is coaxial with the measuring gauge outfit 1 and penetrates through the bracket along the vertical direction, the positioning base 2-2 penetrates through the mounting hole 4-1 from top to bottom, the side wall of the bracket 7 is also provided with a fixing hole 4-2 which is positioned at the side of the mounting hole 4-1 and is vertically communicated with the mounting hole 4-1, the inner wall of the fixing hole 4-2 is provided with internal threads, the dial indicator centering measurement gauge for detecting the center thickness of the biconcave lens or the plano-concave lens further comprises a handle screw 6, one axial end of which can penetrate through the fixing hole 4-2 and extend into the mounting hole 4-1, the handle screw 6 is locked with the internal thread of the fixing hole 4-2 through the external thread arranged at one end in the axial direction so as to fix the relative position of the outer bearing 2 and the bracket 7.
Detect percentage table centering measurement of biconcave lens or plano-concave lens center thickness examine utensil and not only confine above-mentioned embodiment to, the all is the foundation the utility model discloses any improvement or replacement of principle all should be within the protection scope.
Claims (7)
1. A dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens is used for being installed on a dial indicator, the dial indicator comprises a support (7) and a dial plate (4) installed on the support (7), a measuring gauge head (1) for measuring the center thickness of a lens (5) to be measured is arranged at the bottom of the dial plate (4), the lower end part of the measuring gauge head (1) vertically extends downwards to the bottom end of the dial plate (4), and the lens (5) to be measured is the biconcave lens or the plano-concave lens; the method is characterized in that: the dial indicator centering measurement checking fixture is arranged on a support (7) right below the measuring gauge head (1) and keeps a gap with the measuring gauge head (1); the dial indicator centering measurement detection tool comprises an inner bearing seat (3) used for bearing a lens (5) to be detected and an outer bearing seat (2) used for fixing the inner bearing seat (3) on a support (7);
the inner bearing seat (3) is in a two-layer stepped shaft shape, and the inner bearing seat (3) comprises a supporting part (3-1) which is sequentially coaxially overlapped up and down and is used for supporting a lens to be tested and a positioning part (3-2) which is used for fixing the supporting part (3-1) on the outer bearing seat (2);
the outer bearing seat (2) comprises a sleeve joint cylinder (2-1), a positioning base (2-2) and at least 2 positioning walls (2-3), the sleeve joint cylinder (2-1) is of a hollow cylindrical structure with an upper end open and a lower end closed, the top of the positioning base (2-2) is connected below the bottom of the sleeve joint cylinder (2-1), and the outer bearing seat (2) is movably mounted on the support (7) through the positioning base (2-2); the positioning walls (2-3) are arranged at the edge of the top end of the sleeve joint barrel (2-1) in a spaced and annular mode, and each positioning wall (2-3) extends towards the upper side of the sleeve joint barrel (2-1) along the direction parallel to the central shaft of the sleeve joint barrel (2-1);
the positioning part (3-2) is coaxially and movably inserted in the inner cavity of the sleeve joint barrel (2-1), and the outer diameter of the positioning part (3-2) is adapted to the inner diameter of the sleeve joint barrel (2-1); the top surface of the supporting part (3-1) is higher than the top surface of the sleeve joint barrel (2-1) and lower than the top surface of the positioning wall (2-3); one surface of each positioning wall (2-3) facing the center of the sleeve (2-1) is a cambered surface which is matched with the shape of the outer peripheral wall of the lens to be measured (5) and is coaxial with the center of the sleeve (2-1), and the distance from the cambered surface to the central shaft of the sleeve (2-1) is equal to the radius of the lens to be measured (5); the central shafts of the sleeve joint barrel (2-1) and the inner bearing seat (3) which are arranged in place on the support (7) are coaxial with the central shaft of the measuring gauge outfit (1).
2. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the number of the positioning walls (2-3) is 2.
3. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the positioning part (3-2) and the supporting part (3-1) are formed by coaxial cylinders, the diameter of the positioning part (3-2) is equal to the outer diameter of the lens (5) to be measured, and the outer diameter of the supporting part (3-1) is smaller than that of the positioning part (3-2).
4. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the top surface of the supporting part (3-1) is 1.5-2.5mm higher than the top surface of the sleeve joint cylinder (2-1).
5. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the diameter of the supporting part (3-1) is 75-85% of the outer diameter of the lens (5) to be measured.
6. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the outer bearing seat (2) is made of a metal material, and the inner bearing seat (3) is made of a white plastic steel material.
7. The dial indicator centering measurement checking fixture for detecting the center thickness of a biconcave lens or a plano-concave lens as claimed in claim 1, wherein: the dial indicator centering measurement gauge for detecting the center thickness of the biconcave lens or the plano-concave lens further comprises a handle screw (6) with one axial end capable of penetrating through the fixing hole (4-2) and extending into the mounting hole (4-1), wherein the handle screw (6) is matched and locked with the internal thread of the fixing hole (4-2) through the external thread arranged at one axial end to fix the outer bearing seat (2) and the support (7) Relative position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024181.9U CN212300194U (en) | 2020-06-05 | 2020-06-05 | Dial indicator centering measurement checking fixture for detecting center thickness of biconcave lens or plano-concave lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024181.9U CN212300194U (en) | 2020-06-05 | 2020-06-05 | Dial indicator centering measurement checking fixture for detecting center thickness of biconcave lens or plano-concave lens |
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| CN212300194U true CN212300194U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021024181.9U Active CN212300194U (en) | 2020-06-05 | 2020-06-05 | Dial indicator centering measurement checking fixture for detecting center thickness of biconcave lens or plano-concave lens |
Country Status (1)
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| CN (1) | CN212300194U (en) |
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2020
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