JPS6240761Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for attaching a lens holder to a lens to provide a rotation axis for processing the lens in order to mold the peripheral edge of the lens. That is, for example, in eyeglass lenses,
A lens larger than a predetermined shape is polished to form a lens, and then its peripheral edge is ground into a predetermined shape to match the eyeglass frame. Since this grinding process is performed by sequentially grinding the peripheral edge of the lens while rotating it, it is necessary to provide the lens with a rotation axis for processing. On the other hand, eyeglass lenses are required to have a strict positional relationship with the pupil position of the eyeglass wearer, and the processing rotation axis must be set accurately and with high precision. Therefore, conventionally, a lens holder having a suction cup is accurately attracted to a specific position of the lens after polishing, and the lens is held and rotated by this lens holder, while the relative position of the grinding member and the lens is The relationship is controlled by following a so-called template shaped to fit the eyeglass frame.

By the way, the conventional rotation axis setting device 1 for lens molding processing that has a lens holder attachment device has the following features:
As shown in FIG. 1, there is generally a light source section 2 that accommodates a light source system of an optical system for detecting an optical specific position of a lens, a projection section 4 that accommodates a projection system of the optical system, a scale plate 6, and a lens 8. Table part 1 on which the and
0. It is composed of an operating section 14 for operating the lens holder 12. The projection unit 4 has an observation screen 16 that forms a projected image of the scale of the scale plate 6 and the mark of the lens 8. The table section 10 has two holding bars 18 for holding the lens 8 placed on the skating plate 6. The operating section 14 includes a vertical column part 22 having an operation knob 20 at its upper end, and a lens holder 1 fixed to the lower end of the vertical column part 22 and a lens holder 1 at the tip.
2 is removably attached to the swing arm part 24. The swing arm section 24 is normally located at the position shown by the dashed line in FIG.
When attaching (adsorbing) the lens 8 to the lens 8, by operating the operation knob 20, the swing arm 24
The lens holder 12 is rotated to the position shown by the solid line in FIG.
onto the lens 8. After that, the operation knob 20
Although the swinging arm portion 24 rises, the lens holder 12 adsorbed to the lens 8 remains on the lens 8 as it is.

The conventional device for attaching the lens holder of the rotational axis setting device has a problem in that its operation is complicated and requires two steps: rotating the operating knob and then pressing it down.

The present invention was devised in view of the above-mentioned conventional problems, and its structural features include a fixed member, a movable member supported by the fixed member so as to be able to move in a straight line, and one end of which is connected to a first shaft fulcrum. an arm member that is pivotally supported by the movable member with limited rotation and to which a lens holder can be attached to the other end; an operating lever that is pivotally supported at a second fulcrum of the fixed member; and a second arm member of the arm member. a sliding member fixed between the one-axis fulcrum and the lens holder attachment point and sliding in a groove provided in the operating lever; a first spring engagement point of the fixing member and a second spring engagement point of the arm member; a tension spring connected to a spring engagement point, a first state in which the operating lever and the arm member are substantially perpendicular to the linear movement direction of the moving member;
By rotating the operating lever with respect to the first state, the arm member is rotated about the first axis fulcrum until just before the linear movement direction, and the sliding member abuts the end of the groove. In the stopped second state, by further rotating the operating lever with respect to the second state, the sliding member in contact with the end of the groove moves the moving member, and at the same time, the arm member moves in the linear direction. a third state in which the operating lever is rotated to the direction and locked; and a third state in which the operating lever is further rotated relative to the third state so that the sliding member slides within the groove, and the movable member and the arm member are integrated together. When dividing into a fourth state in which the lens holder moves linearly toward the lens holder side, in the first state to the second state, the second spring engagement point is the second state with respect to the reference line passing through the first spring engagement point and the first axis fulcrum.
The second spring engagement point is on the opposite side to the pivot point, and the second spring engagement point passes on the reference line while changing from the second state to the third state, and the second spring engagement point passes on the reference line from the third state to the fourth state. The second spring engagement point is provided on the same side as the second shaft fulcrum.

By configuring the present invention as described above,
The lens holder can be attached to the lens with a single operation of the operating lever, providing excellent functionality.
In addition, the lens holder is attached to the lens by descending vertically, and the arm member rises vertically immediately after attachment, so it is possible to accurately attach the lens holder to the desired position regardless of the curvature of the lens surface. Moreover, the arm member does not flick off the lens after the lens holder is attached. Furthermore, since the arm member is automatically retracted out of the optical path of the observation optical system except when the lens holder is attached, it has excellent functionality in this respect as well.

Examples of the present invention will be described below. As shown in FIG. 2, the rotation axis setting device 100 for lens molding includes a base section 102 that accommodates a light source section of an optical system for detecting an optical specific position of a lens, and a projection optical system of the optical system. It consists of a projection unit 104 to be accommodated, and a mounting device 108 for a lens holder 106, which is an embodiment of the present invention. The base section 102 has a lens mounting table 110 and a light source switch 112.
The projection unit 104 has an objective lens 114 and a projection screen 118 with a scale 116 arranged directly above the lens mounting table 110. The projection section 104
is used to adjust the movement of the lens 120 using the scale 116 on the projection screen 118 so that the origin and the mark image of the lens 120 are in a predetermined positional relationship. The mark on the lens 120 is an index provided at the lens optical axis position. By performing this position adjustment, when the lens after peripheral grinding is fitted into a frame and worn by a glasses wearer, the pupil position and the lens optical axis will coincide.
The attachment device 108 of the lens holder 106 includes an operating lever 214 and an arm member 20 attached to the fixing member 200.
9 is rotatably attached, and the arm member 209
The lens holder 106 is attached to the mount part 208 at the tip of the lens holder 106.
is installed. And the operation lever 214
By rotating the arm member 12 downward,
4 moves above the lens 120, and then descends vertically onto the lens 120 to hold the lens holder 1.
06 onto the lens 120. Operation lever 2
When the force on the lens 14 is weakened, the operating lever 214 rotates in the opposite direction to the front, and the arm member 209 with the lens holder 106 mounted on the lens 120 moves in the opposite direction to the above-mentioned mounting operation, so that it rotates as shown in FIG. Return to the state shown.

The attachment device 108 of the lens holder 106 is a third
As shown in the figure and FIG.
0, a movable member 204 sliding within the cylindrical portion 202 of the fixed member 200, a first axis fulcrum 2 of the movable member 204;
07 via the first shaft support member 206, and the mount portion 2 of the lens holder 106 is attached to the tip of the first shaft support member 206.
Arm member 209 and fixed member 200 having 08
The second shaft supporting member 210 is attached to the second shaft supporting point 211 which is integrated with the
An operating lever 214 is pivotally supported through the arm member 209 and has an operating knob 212 at its tip. The operating lever 214 is fixed between the first pivot point 207 of the arm member 209 and the mount portion 208 and slides in a groove 218 provided in the operating lever 214. The sliding member 220, the first spring engagement point 223 of the first spring engagement member 222 on the fixed member 200, and the second spring engagement point 223 of the second spring engagement member 224 on the arm member 209.
engages at spring engagement point 225 and cylindrical portion 202
It consists of a tension spring 226 passing inside.

The moving member 204 includes a first sliding member 228 that slides within the cylindrical portion 202 and a pair of anti-rotation bearings 230 that are arranged parallel to the first sliding member 228.
and a second sliding member 232 that moves linearly therein.

The mount portion 208 includes a fitting member 242 fixed to the arm member 209 with a screw 240, a lens holding ring 248 elastically attached to the fitting member 242 with a screw 244 and a spring 246,
The lens holding pin 252 is elastically implanted in the lens holding ring 248 via a spring 250, and the distal end recess 254 of the fitting member 242 has a
As shown in FIG. 5, the suction cup 256 and the fitting member 25
A lens holding member 106 consisting of 8 is removably fitted.

The first shaft fulcrum 207, the second shaft fulcrum 211, the first spring engagement point 223, the second spring engagement point 225, the groove 218 provided in the operating lever 214, the sliding member 22
The mutual positional relationship of 0 etc. is as follows. In FIG. 6, the first spring engagement point 223 and the first shaft fulcrum 20
Consider a reference line 270 that passes through 7 and 7.

(1) At all times, that is, in the first state where no force is applied to the operating lever 214, the operating lever 214
A and the arm member 209A are substantially perpendicular to the reference line 270, and the sliding member 220A is in the groove 21
It is near one end of 8A.

(2) Rotate the operating lever 214A relative to the first state, and the operating lever 214B and the mount section 208
Let it be the second state of B. The sliding member 220B is the groove 2
18B, while the second spring engagement point 225B is still on the opposite side of the second shaft fulcrum 211 with respect to the reference line 270, so that the tension spring 22
6 gives the arm member 209B a rotational moment in the counterclockwise direction in the drawing.

(3) The operating lever 214B is further rotated from the second state to bring the operating lever 214C and the mount portion 208C into a third state. From the second state to the third state
In this state, the end of the groove 218B(C) pulls the sliding member 220B(C) to move the movable member 204, that is, the first axis fulcrum 207B(C) downward in the drawing, and the mount portion 208C
The center of the image will now be on the reference line 270. At the same time, the second spring engagement point 225B passes over the reference line 270 and becomes the second spring engagement point 225C. The second spring engagement point 225C is at the reference line 270
Since it is on the same side as the second axis fulcrum 211,
The tension spring 226 applies a clockwise rotational moment to the arm member 209C.

(4) The operating lever 214C is further rotated from the third state to bring the operating lever 214D and the mount portion 208B into a fourth state. 3rd state to 4th state
In the state, the arm member 209C(D) is in the first position.
The locking member 260 of the shaft support member 206 prevents clockwise rotation, while the clockwise rotational moment exerted on the arm member 209C(D) by the tension spring 226 continues to act on the moving member 204. , the arm member 209C(D) and the mount portion 208C(D) are integrally aligned in the reference line direction 27.
0 and move the lens holder 106 attached to the mount part 208C(D) to the lens 120.
push against.

(5) When the force applied to the operating lever 214D is weakened in the fourth state, the operation is performed in the exact opposite order to the above. In particular, when changing from the fourth state to the third state, the tension spring 226
Since a clockwise rotational moment is applied to the lens, the arm member 209D(C) rises along the reference line 270 in the vertical direction of the lens.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional rotation axis setting device for lens molding processing, Fig. 2 is a perspective view of a rotation axis setting device for lens molding processing employing an embodiment of the present invention, and Fig. 3 is a perspective view of a rotation axis setting device for lens molding processing according to the present invention. 4 is a plan view including a partial cross section taken along the line - of FIG. 3, FIG. 5 is a perspective view of the lens holder, and FIG. 6 is an explanation of the embodiment of the present invention. It is a diagram. 100... Rotation axis setting device for lens processing, 1
06...Lens holder, 108...Mounting device, 120
... Lens, 200... Fixed member, 204... Moving member, 208... Mount part, 209... Arm member,
211...Cylindrical part, 226...Tension spring, 248...
Lens holding ring, 252...Lens holding pin, 2
70...Reference line.

Claims (1)

[Claims for Utility Model Registration] A fixed member, a movable member supported by the fixed member so as to be movable in a straight line, one end of which is pivotally supported by the movable member at a first pivot point with limited rotation, and the other end of which is pivotally supported by the movable member with limited rotation. an arm member to which a lens holder can be attached, an operating lever pivotally supported at a second axis fulcrum of the fixing member, and an operating lever fixed between the first axis fulcrum of the arm member and the lens holder attachment point, and the aforementioned The operating lever includes a sliding member that slides in a groove provided in the operating lever, and a tension spring connected to a first spring engaging point of the fixed member and a second spring engaging point of the arm member, and a first state in which the arm member is substantially perpendicular to the linear movement direction of the moving member;
By rotating the operating lever with respect to the first state, the arm member is rotated about the first axis fulcrum until just before the linear movement direction, and the sliding member abuts the end of the groove. In the stopped second state, by further rotating the operating lever with respect to the second state, the sliding member in contact with the end of the groove moves the moving member, and at the same time, the arm member moves in the linear direction. a third state in which the operating lever is rotated to the direction and locked; and a third state in which the operating lever is further rotated relative to the third state so that the sliding member slides within the groove, and the movable member and the arm member are integrated together. When dividing into a fourth state in which the lens holder moves linearly toward the lens holder side, the second spring engagement point is the first state from the first state to the second state.
The reference line passing through the spring engagement point and the first shaft fulcrum is on the opposite side to the second shaft fulcrum, and during the change from the second state to the third state, the second spring engagement point passes on the reference line, and A lens holder mounting device characterized in that the second spring engagement point is provided so that the second spring engagement point is on the same side as the second axis support point with respect to the reference line from the third state to the fourth state.