TWI420181B - Tool for supporting lenses - Google Patents

Description

Lens bearing fixture

The invention relates to a lens carrying fixture.

When the circular lens is injection molded, the circular lens is first measured before assembly. In general, a laser range finder is used to measure several points on a circular lens. In order to make the measurement result error small, a plurality of points are generally selected on one surface of the circular lens, and the points are located on the same circumference as the center of the circular lens. In the prior art, the surveyor typically employs a lens-carrying jig holding lens having a lens-bearing aperture of row a and column b. When measuring one of the circular lenses, the surveyor will arbitrarily align the point on the circular lens to measure first, then rotate the lens to carry the jig to change the next measurement point. Because of the rotation, the surveyor cannot guarantee the rotation axis. The heart does not change, and the measurement point is not on the circumference of the circle center of the circular lens, so that the difference in lens thickness obtained at each measurement point is large, so that the lens measurement result error is large.

In view of this, it is necessary to provide a lens carrying jig that can reduce measurement errors.

A lens bearing fixture comprising: a conveying table for holding at least one circular lens to be tested, a limiting rail and a fixing portion; the conveying table is slidingly coupled with the limiting rail; the fixing portion is for supporting The limit rail is rotatably connected to the limit rail.

Compared with the prior art, the lens bearing fixture is fixed by the limiting rail The rotation of the shaft ensures that the measuring points on the same circular lens are on the same circumference as the center of the circular lens, thereby reducing the measurement error.

100,100a, 100b, 100c, 100d‧‧‧ lens bearing fixture

10,10a‧‧‧Transfer station

22‧‧‧ bottom

12,242a‧‧‧Bumps

22b‧‧‧ pillar

242,12a‧‧‧ Groove

24b‧‧‧ bottom

20, 20a, 20b, 20c, 20d ‧ ‧ limit rails

30, 30b, 30c‧‧‧ fixed department

24,24a‧‧‧ Sidewall

80‧‧‧ round lenses to be tested

22c, 22d‧‧‧ Limit rail bottom surface

24d‧‧‧round pillar

40, 40b, 40c‧‧‧ rolling bearings

42,42b, 46c‧‧‧ inner circle

50c, 32d‧‧‧ round counterbore

24c‧‧‧through hole

42c‧‧‧ outer ring

90‧‧‧Circle

82‧‧‧Next lens

60c‧‧‧screw

44c‧‧‧ screw hole

A‧‧‧Transfer direction

B, C‧‧‧ measuring points

1 is a perspective view of a lens carrying jig according to a first embodiment of the present invention.

Figure 2 is a cross-sectional view of the lens carrying jig of Figure 1 taken along line II-II.

FIG. 3 is a schematic view showing the working state of the lens bearing jig of FIG. 1. FIG.

4 is a schematic view showing another working state of the lens bearing jig of FIG. 1.

Figure 5 is a cross-sectional view showing a lens carrying jig according to a second embodiment of the present invention.

Figure 6 is a cross-sectional view of a lens carrying device according to a third embodiment of the present invention.

Figure 7 is a cross-sectional view showing a lens carrying jig according to a fourth embodiment of the present invention.

Figure 8 is a cross-sectional view showing a lens carrying jig according to a fifth embodiment of the present invention.

The following preferred embodiments will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 2 , a lens carrying jig 100 according to a first embodiment of the present invention includes a transfer table 10 , a limit rail 20 and a fixing portion 30 .

The transfer station 10 is used to carry and transport at least one circular lens to be tested. The limit rail 20 includes a bottom portion 22 and two opposite side walls 24 that are perpendicularly connected to the bottom portion 22. The opposite sides of the two side walls 24 respectively define a recess 242 extending in a direction parallel to the conveying direction A of the conveying table 10, and the bottom portion 22 and the two side walls 24 together form a receiving space. . The opposite side of the transfer table 10 There is a bump 12 that cooperates with the groove 242. The transfer table 10 is slidably coupled to the limit rail 20 by the projection 12 engaging the recess 242. The fixing portion 30 is a stud for supporting the limit rail 20 . A roller bearing 40 is fixed to the bottom portion 22 of the limiting rail 20, and one end of the fixing portion 30 and the inner ring 42 of the rolling bearing 40 are slidably coupled to the limiting rail 20 by a sliding fit. It can be understood that the cross section of the bump 12 in the conveying direction A perpendicular to the conveying table 10 is triangular or semi-circular, and the cross section of the groove 242 in the conveying direction A perpendicular to the conveying table 10 is also triangular or Semicircular.

3 and 4, the operation of the lens carrying jig 100 will be described below. When the circular lens 80 to be tested is measured, the external thread 32 of the fixing portion 30 is screwed with a screw hole formed in a bearing platform (not shown) to fix the lens bearing fixture 100 on the bearing. on the platform. During the measurement, the transfer table 10 is slid so that the laser range finder ("+" represents the measurement sight of the laser range finder in FIGS. 3 and 4) is detected and aligned with a surface 92 of the circular lens 80 to be tested. One measurement point B, after obtaining the data of point B, is rotated by a certain angle with the rotation axis of the rolling bearing 40, that is, the next measurement point C can be found, so that the measurement point C is at the center of the circle with the circular lens 80. 90 on. By analogy, the remaining measurement points on the circumference 90 can be found, thereby reducing the measurement error. The tester can push the transfer table 10 along the transport direction A of the transfer table 10 to slide the transfer table 10 within the limit guide 20, thereby facilitating the measurement of the next lens 82.

Referring to FIG. 5, a lens bearing fixture 100a according to a second embodiment of the present invention is different from the lens bearing fixture 100 provided in the first embodiment in that opposite sides of the two side walls 24a of the limiting rail 20a are provided. A bump 242a is respectively provided. The direction in which the bump 242a extends is parallel to the transport direction A of the transport stage 10a (see FIG. 1). The bottom portion 22a and the two side walls 24a together form a receiving space. Transfer The corresponding sides of the table 10a have a recess 12a that cooperates with the bump 242a. The transfer table 10a is slidably coupled to the limit rail 20a by the protrusion 242a and the groove 12a, and is accommodated in the accommodating space.

Referring to FIG. 6, a lens bearing jig 100b according to a third embodiment of the present invention is different from the lens bearing jig 100 of the first embodiment in that the bottom surface 24b of the limiting rail 20b has a post 22b. A rolling bearing 40b is mounted on one end of the fixing portion 30b near the bottom surface 24b of the limiting rail 20b. The strut 22b is coupled to the inner ring 42b of the rolling bearing 40b by a sliding fit. The lens bearing jig 100b provided by the embodiment can fix the axis rotation, and ensure that the measurement points on the same circular lens are on the same circumference of the circular lens, thereby reducing the measurement error.

Referring to FIG. 7 , a lens bearing fixture 100c according to a fourth embodiment of the present invention is different from the lens bearing fixture 100 provided by the first embodiment in that the bottom surface 22c of the limiting rail 20c is embedded with the same. A circular counterbore 50c of the rolling bearing 40c. The depth of the circular counterbore 50c is smaller than the height of the outer ring 42c of the rolling bearing 40c. The rolling bearing 40c is symmetrically provided with two screw holes 44c. Two through holes 24c are symmetrically opened on the side wall of the circular counterbore 50c in a direction perpendicular to the conveying direction A of the conveying table 10c (refer to FIG. 1); the lens bearing jig 100c further includes a screw 60c corresponding to the screw hole 44c. . The screw 60c is screwed into the screw hole 44c through the through hole 24c, and the rolling bearing 40c is fixedly coupled to the limit rail 20c. One end of the fixing portion 30c is coupled to the inner ring 46c of the rolling bearing 40c by a sliding fit. The lens carrying jig 100c provided by the embodiment ensures that the measuring points on the same circular lens are on the same circumference as the center of the circular lens, which reduces the measurement error, and the screw 60c can unscrew the screw. The hole 44c further releases the screw 60c to fix the rolling bearing 40c to the limit rail 20c, so that the user can replace the limit rail 20c of different models.

Referring to FIG. 8 , a lens bearing fixture 100 d according to a fifth embodiment of the present invention is different from the lens bearing fixture 100 provided by the first embodiment in that the bottom surface 22 d of the limiting rail 20 d has a circular pillar. 24d, the fixing portion 30d has a circular counterbore 32d that is rotatably engaged with the circular post 24d. The inner diameter of the circular counterbore 32d is slightly larger than the outer diameter of the circular post 24d, so that the circular post 24d is movably received in the circular counterbore 32d. Further, in order to reduce the friction between the circular counterbore 32d and the circular strut 24d, a lubricating material (not shown) may be applied between the circular counterbore 32d and the circular strut 24d to ensure The circular pillar 24d is smoothly rotated in the circular counterbore 32d. Therefore, the lens bearing jig 100d provided by the embodiment can fix the axis rotation, and ensure that the measurement points on the same circular lens are on the same circumference of the circular lens, thereby reducing measurement error.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Lens bearing fixture

10‧‧‧Transfer station

20‧‧‧Limited rails

30‧‧‧ Fixed Department

32‧‧‧External thread

80‧‧‧ round lenses to be tested

A‧‧‧Transfer direction

Claims (7)

A lens bearing fixture comprising: a conveying table for holding at least one circular lens to be tested, a limiting rail and a fixing portion; the conveying table is slidingly coupled with the limiting rail; the fixing portion is for supporting The limiting rail has a rolling bearing fixedly connected to the bottom of the limiting rail, and one end of the fixing portion is slidably coupled with the inner ring of the rolling bearing to rotatably connect the fixing portion with the limiting rail. The lens bearing fixture of claim 1, wherein the limiting rail comprises two opposite side walls perpendicularly connected to the bottom; at least one side wall defines a groove, and the extending direction of the groove Parallel to the conveying direction of the conveying table, the bottom portion and the two side walls together form a receiving space; the opposite side of the conveying table has a convex block matching the groove; the conveying table is formed by the protruding block The recess is coupled to the recess and coupled to the limiting rail to be received in the receiving space. The lens bearing jig according to claim 2, wherein the convex portion has a square shape, a triangular shape or a semicircular shape along a conveying direction perpendicular to the conveying direction of the conveying table, the groove being perpendicular to the conveying table The cross-sectional shape of the conveying direction is also a square, triangular or semi-circular shape that matches the projection. The lens bearing fixture of claim 1, wherein the limiting rail comprises a bottom portion and two opposite side walls perpendicularly connected to the bottom portion; at least one side wall has a convex portion on the inner side thereof, the convex portion The extending direction of the block is parallel to the conveying direction of the conveying table, and the bottom forms a receiving space with the two side walls; the conveying table has a corresponding groove corresponding to the protruding block; The protrusion is coupled to the recess and slidably coupled to the limiting rail to be received in the receiving space. The lens bearing fixture of claim 4, wherein the bump is perpendicular to the pass The cross-sectional shape of the conveying direction of the feeding table is square, triangular or semi-circular, and the cross-sectional shape of the groove along the conveying direction perpendicular to the conveying table is also a square, triangular or semi-circular shape matching the convex piece. The lens bearing jig according to claim 3, wherein the fixing portion is a stud. The lens bearing fixture of claim 1, wherein the bottom of the limiting rail is provided with a circular counterbore embedded with the rolling bearing, the depth of the counterbore being smaller than the width of the outer end surface of the rolling bearing; the rolling bearing Two screw holes are symmetrically disposed, and two through holes are symmetrically opened on a sidewall of the counterbore perpendicular to the conveying direction of the conveying table; the lens bearing fixture further includes a screw corresponding to the screw hole; the screw passes through the through hole The hole is screwed into the screw hole, and the rolling bearing is fixedly connected with the limiting rail; one end of the fixing portion is connected with the inner ring of the rolling bearing by a sliding fit.