CN114434220A - Glasses lens and processing technology thereof - Google Patents
Glasses lens and processing technology thereof Download PDFInfo
- Publication number
- CN114434220A CN114434220A CN202210173073.5A CN202210173073A CN114434220A CN 114434220 A CN114434220 A CN 114434220A CN 202210173073 A CN202210173073 A CN 202210173073A CN 114434220 A CN114434220 A CN 114434220A
- Authority
- CN
- China
- Prior art keywords
- frame
- polishing
- spectacle lens
- processing technology
- flexible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C13/00—Assembling; Repairing; Cleaning
- G02C13/001—Assembling; Repairing
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Health & Medical Sciences (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention belongs to the technical field of spectacle lens processing, and particularly relates to a spectacle lens and a processing technology thereof; the process comprises the following steps: the method comprises the following steps: cutting the flaky crystal into a spectacle lens blank to obtain a blank; step two: processing a frame mounting groove on one side of the blank, and molding and polishing the periphery of the frame mounting groove and the surface of the spectacle lens to obtain a shaped blank; step three: further polishing the surface of the shaping blank by a flexible polishing device to ensure that the surface of the spectacle lens meets the requirements of a wearer; the flexible polishing device comprises a multi-side clamper support and a side flexible clamping bracket, wherein a support frame is arranged on the multi-side clamper support, a bottom supporting plate with adjustable height is arranged on the support frame, and two driving wheels are symmetrically and rotatably connected on the multi-side clamper support; the thickness of the spectacle lens processed in the application is gradually reduced at the position close to the frame; this application can reduce the wearing and tearing that the in-process binding clasp led to the fact the glasses lens of polishing to the glasses lens.
Description
Technical Field
The invention belongs to the technical field of processing of spectacle lenses, and particularly relates to a spectacle lens and a processing technology thereof.
Background
The crystal resists the corrosion of common acid solution, chemical acid such as sulfuric acid, hydrochloric acid and the like can not resist the crystal, and people engaged in the workers wear crystal glasses and have good eye protection effect; compared with resin materials, the hardness of the crystal glasses lens is high, so that the crystal glasses lens needs to be protected by optimizing a clamping mode when being molded and processed, and abrasion of the clamping device to the crystal glasses lens in the polishing process of the crystal glasses lens is reduced.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide an eyeglass lens and a processing process thereof, which can reduce abrasion of a clamper to the eyeglass lens in a process of grinding the eyeglass lens.
The invention provides a spectacle lens processing technology, which comprises the following steps:
the method comprises the following steps: cutting the flaky crystal into a spectacle lens blank to obtain a blank;
step two: processing a frame mounting groove on one side of the blank, and molding and polishing the periphery of the frame mounting groove and the surface of the spectacle lens to obtain a shaped blank;
step three: through flexible burnishing device, further polish the surface of design embryo, make glasses lens surface accord with wearer's demand.
The flexible polishing device comprises a multi-side clamping device support, a support frame, a bottom supporting plate, a lateral part hinged frame, a lateral part flexible clamping bracket and a driving wheel, wherein the support frame is installed on the multi-side clamping device support, the bottom supporting plate with adjustable height is arranged on the support frame, the multi-side clamping device support is symmetrically and rotatably connected with the two driving wheels, the lateral part hinged frame is installed on the driving wheel, the lateral part flexible clamping bracket is installed at the upper end of the lateral part hinged frame, the lateral part flexible clamping bracket is connected with the lateral part of the glasses lens through an elastic gasket, and the bottom supporting plate can be matched with the lower end cambered surface of the glasses lens in a laminating manner.
The spectacle lenses are used in pairs, the two spectacle lenses are connected through a frame, and the frame is arranged in a frame mounting groove on the spectacle lenses.
Drawings
The following drawings are only intended to illustrate and explain the invention schematically, wherein:
FIG. 1 is a flow chart of a spectacle lens processing process of the present invention;
FIG. 2 is a schematic view of a spectacle lens according to the present invention;
FIG. 3 is a schematic structural view of the side flexible clamping bracket of the present invention;
FIG. 4 is a schematic structural view of the transmission frame of the present invention;
FIG. 5 is a schematic view of the multi-sided clamp mount of the present invention;
FIG. 6 is a schematic view of the polishing sander of the present invention;
FIG. 7 is a schematic structural view of an articulated arm of the invention;
FIG. 8 is a schematic structural view of a piercing pin according to the present invention;
FIG. 9 is a schematic view of the construction of the bottom pallet of the present invention;
FIG. 10 is a schematic structural diagram of the support frame of the present invention;
fig. 11 is a schematic structural diagram of the elastic limiting plate according to the invention.
Detailed Description
Specific examples of the present invention will be explained below.
An eyeglass lens processing technology comprises the following steps:
the method comprises the following steps: cutting the flaky crystal into a spectacle lens blank to obtain a blank;
step two: processing a frame mounting groove on one side of the blank, and molding and polishing the periphery of the frame mounting groove and the surface of the spectacle lens to obtain a shaped blank;
step three: through flexible burnishing device, further polish the surface of design embryo, make glasses lens surface accord with wearer's demand.
See FIGS. 2-3 and FIGS. 9-11 for an illustration:
the flexible polishing device comprises a multi-side clamper holder 201, a support frame 206, a bottom supporting plate 208, a side part hinged frame 401, a side part flexible clamping bracket 402 and a transmission wheel 403, wherein the support frame 206 is fixedly connected to the multi-side clamper holder 201, the bottom supporting plate 208 with adjustable height is arranged on the support frame 206, the multi-side clamper holder 201 is symmetrically and rotatably connected with the two transmission wheels 403, the side part hinged frame 401 is fixedly connected to the transmission wheel 403, the side part flexible clamping bracket 402 is installed on the side part hinged frame 401, the side part flexible clamping bracket 402 is connected with the side part of the spectacle lens through an elastic gasket, and the bottom supporting plate 208 can be in fit with the lower end cambered surface of the spectacle lens.
Firstly, a shaping blank is placed on a bottom supporting plate 208, and the distance between the bottom supporting plate 208 and a multi-side clamper holder 201 is adjusted, so that a side part of the spectacle lens can be clamped by a side part flexible clamping bracket 402 conveniently;
the side flexible clamping bracket 402 is connected with the side of the glasses lens through an elastic gasket, so that the protection effect on the glasses lens can be improved, and the abrasion of the clamping device on the glasses lens in the polishing process of the glasses lens can be reduced;
the bottom supporting plate 208 can be in fit with the lower end cambered surface of the glasses lens, at the moment, the bottom supporting plate 208 is in hard contact with the glasses lens through the cambered surface, a preliminary limiting effect is achieved, then the installation mode is switched, the glasses lens is flexibly clamped from the side part, the top part and the lower part continuously, and the clamping protection effect on the glasses lens is further improved;
the driving wheel 403 is controlled by a motor to rotate on the multi-side clamping device support 201, so that the side flexible clamping bracket 402 can be opened and closed, the two sides of the spectacle lens are flexibly clamped, and at the moment, the side flexible clamping bracket 402 is connected with the side of the spectacle lens through an elastic gasket.
See fig. 4 and 11 for illustration:
the flexible polishing device further comprises an anti-overturn supporting plate 202, and the anti-overturn supporting plate 202 is fixedly connected to the lower end of the multi-side clamper holder 201.
The design of the overturn-preventing supporting plate 202 can improve the anti-vibration effect and the overturn-preventing effect of the multi-side clamper holder 201.
See FIG. 4 for illustration:
the flexible polishing device further comprises a transmission frame 301, the transmission frame 301 is connected to the multi-side clamper holder 201 in a sliding mode, and the transmission frame 301 is in transmission connection with two transmission wheels 403.
The transmission frame 301 is respectively connected with the two transmission wheels 403 in a friction transmission manner, and arc-shaped contact surfaces are respectively arranged on two sides of each transmission wheel 403;
the multi-side clamper holder 201 is provided with a hydraulic cylinder for driving the transmission frame 301 to slide on the multi-side clamper holder 201, and the hydraulic cylinder is started to enable the transmission frame 301 to drive the two transmission wheels 403 to rotate, so that the two side flexible clamping brackets 402 clamp two sides of the spectacle lens.
See FIG. 9 for illustration:
the flexible polishing device further comprises a bottom flexible clamping bracket 302, the bottom flexible clamping bracket 302 is fixedly connected to the transmission frame 301, and the bottom flexible clamping bracket 302 is connected with the lower sides of the glasses lenses through elastic gaskets.
The hydraulic cylinder is started, so that the transmission frame 301 drives the bottom flexible clamping bracket 302 to support the lower parts of the spectacle lenses, and drives the two side flexible clamping brackets 402 to clamp the two sides of the spectacle lenses.
See fig. 4 and 11 for illustration:
the flexible polishing device further comprises an articulated frame 203, a movable gear shaft 204, a hollow rack plate 501 and an upper flexible clamping bracket 502, the articulated frame 203 is fixedly connected to the multi-side clamp support 201, the movable gear shaft 204 is rotatably connected to the articulated frame 203, the hollow rack plate 501 is slidably connected to the articulated frame 203, the movable gear shaft 204 is in transmission connection with the hollow rack plate 501 and a transmission frame 301, the upper flexible clamping bracket 502 is installed on the hollow rack plate 501, and the upper flexible clamping bracket 502 is connected with the upper side of the glasses lens through an elastic gasket.
The movable gear shaft 204 can be controlled by a motor to rotate on the hinge frame 203, and then the positions of the movable gear shaft and the hinge frame are locked by a fastener, so that the upper flexible clamping bracket 502 and the side flexible clamping bracket 402 can keep the function of clamping the upper side and the lower side of the spectacle lens, and the stability of the device in grinding the spectacle lens is improved;
the hydraulic cylinder is started, so that the transmission frame 301 can drive the hollow rack plate 501 to move downwards in the ascending process, the upper flexible clamping bracket 502 and the side flexible clamping bracket 402 move towards the direction close to each other at the same time, and the two side hinged frames 401 are buckled together to clamp the side parts of the glasses lenses;
in order to improve the positioning effect, after the equipment flexibly clamps the multiple sides of the spectacle lenses, the position of the multiple-side clamper holder 201 is locked among the transmission frame 301, the side hinged frame 401 and the hollow rack plate 501 through fasteners;
the movable gear shaft 204 is provided in an H-shape, and the limit effect between the movable gear shaft 204 and the hollow rack plate 501 and the transmission frame 301 can be maintained.
See fig. 4 and 11 for illustration:
the flexible polishing device further comprises an elastic limiting plate 503, the elastic limiting plate 503 is fixedly connected to the upper flexible clamping bracket 502, and the elastic limiting plate 503 can be fitted with the lower end of the side part of the spectacle lens.
The elastic limiting plate 503 can tightly support the glasses lens, and when the frame mounting groove is polished from the other side of the glasses lens, the clamping stabilizing effect of the equipment on the glasses lens can be improved;
and the flexible tight bracket 502 that presss from both sides in upper portion is located the glasses lens upside, and flexible tight bracket 302 of bottom and elasticity limiting plate 503 are located the glasses lens downside, and these three support starting points are located same perpendicular and horizontal virtual plane, increase its flexible tight effect of pressing from both sides, and spill more position, be convenient for carry out abundant polishing to the glasses lens and polish, because synchronous motion between two lateral part articulated framves 401, can play and carry out spacing effect to position each other, further improve the flexible tight effect of pressing from both sides to the glasses lens.
See FIGS. 6-8 for an illustration:
the flexible polishing device further comprises polishing grinders 601, one polishing grinder 601 is installed on the multi-side clamp support 201 through the control frame, the number of the polishing grinders 601 is two, and the two polishing grinders 601 are respectively used for polishing and grinding the upper side and the lower side of the glasses.
The polishing sander 601 can polish and grind the surface of the spectacle lens, so that the spectacle lens surface meets the degree requirement and the shape requirement of a wearer.
See FIGS. 6-7 for an illustration:
the flexible polishing apparatus further includes a slurry retaining tank 602, and the polishing sander 601 is provided with a plurality of slurry retaining tanks 602.
Polishing cream is retained groove 602 and is equipped with rectangular shape groove and circular recess, and the meticulous degree of polishing cream in the circular recess is greater than the polishing cream of rectangular shape inslot, realizes multistage polishing effect, and the circular recess can partially draw in the polishing cream of high accuracy in, later high accuracy polishing cream spreads gradually to the rectangular shape inslot to make the device strengthen gradually the surface finish degree of glasses lens.
As shown in fig. 2:
the spectacle lenses 102 are used in pairs, and the two spectacle lenses 102 are connected by the frame 101, and the frame 101 is mounted in a frame mounting groove on the spectacle lenses 102.
The glasses lenses 102 are connected in the frame mounting groove through the frame 101, the frameless glasses can be conveniently processed, the frame 101 can adopt a nose clip structure, the arrangement of ear hooks on the glasses lenses 102 is reduced, and the complete effect and the light transmission effect of the glasses lenses 102 are improved.
See FIGS. 7-8 for an illustration:
the control frame comprises a fixed gear shaft 205, an articulated arm 701, a core penetrating rod 702, a vertical tensioning seat 703 and a positioning rotating frame 704, the fixed gear shaft 205 is fixedly connected to the multi-side clamping device support 201, the positioning rotating frame 704 is rotatably connected to the fixed gear shaft 205, the vertical tensioning seat 703 is slidably connected to the positioning rotating frame 704, a tension spring is installed between the vertical tensioning seat 703 and the positioning rotating frame 704, the core penetrating rod 702 is rotatably connected to the vertical tensioning seat 703, a torsion spring is installed between the core penetrating rod 702 and the vertical tensioning seat 703, the core penetrating rod 702 is fixedly connected to the articulated arm 701, and the articulated arm 701 is rotatably connected with the polishing sander 601.
A speed reducing motor is arranged on the positioning rotating frame 704, and a driving gear is arranged on the positioning rotating frame 704, so that the driving gear is in meshing transmission connection with the fixed gear shaft 205;
the position between the polishing sander 601 and the eyeglass lens is changed by starting the speed reducing motor;
the vertical tensioning seat 703 can be clamped in the positioning rotating frame 704, so that an automatic limiting function is realized;
the tension spring is arranged, so that the polishing sander 601 can compress the glasses lenses 102 when polishing the glasses lenses 102;
the torsion spring is arranged, so that the polishing surface of the polishing polisher 601 can be automatically covered on the surface direction of the spectacle lens;
the articulated arm 701 is provided with a rotation motor for driving the polishing sander 601 to rotate about its own axis.
See FIGS. 9-11 for an illustration:
the flexible polishing device further comprises a supporting plate lifting frame 207, an elastic pull rope 209 and a pull rope plate 504, wherein the bottom supporting plate 208 is connected with the supporting frame 206 through the supporting plate lifting frame 207, the supporting plate lifting frame 207 is connected to the supporting frame 206 in a sliding mode, the supporting plate lifting frame 207 is fixedly connected with the bottom supporting plate 208, a spring is arranged between the supporting frame 206 and the supporting plate lifting frame 207, the elastic pull rope 209 is arranged between the bottom supporting plate 208 and the pull rope plate 504, and the pull rope plate 504 is fixedly connected to the upper flexible clamping bracket 502.
Starting the hydraulic cylinder, lifting the transmission frame 301, descending the upper flexible clamping bracket 502, driving the elastic pull rope 209 to be tightened and stretched, contracting the spring at the moment, and continuously controlling the upper flexible clamping bracket 502 to descend when the acting force of the elastic pull rope 209 is equal to the acting force of the spring, so that the bottom supporting plate 208 is automatically separated from the lower end of the spectacle lens, and the effect of replacing hard connection with flexible clamping is realized;
when the upper flexible clamping bracket 502 is reset, the bottom pallet 208 automatically resets, re-hardbacks, and automatically limits.
Claims (10)
1. A spectacle lens processing technology is characterized in that: the method comprises the following steps:
the method comprises the following steps: cutting the flaky crystal into a spectacle lens blank to obtain a blank;
step two: processing a frame mounting groove on one side of the blank, and molding and polishing the periphery of the frame mounting groove and the surface of the spectacle lens to obtain a shaped blank;
step three: through flexible burnishing device, further polish the surface of design embryo, make glasses lens surface accord with wearer's demand.
2. An eyeglass lens processing technology according to claim 1, characterized in that: the flexible polishing device comprises a multi-side clamping device support (201) and transmission wheels (403), a support frame (206) is installed on the multi-side clamping device support (201), a bottom supporting plate (208) with adjustable height is arranged on the support frame (206), the multi-side clamping device support (201) is symmetrically and rotatably connected with the two transmission wheels (403), a side part hinged frame (401) is installed on the transmission wheels (403), a side part flexible clamping bracket (402) is installed at the upper end of the side part hinged frame (401), the side part flexible clamping bracket (402) is connected with the side part of a spectacle lens through an elastic gasket, and the bottom supporting plate (208) can be fitted and matched with the lower end arc surface of the spectacle lens.
3. An eyeglass lens processing technology according to claim 2, characterized in that: the lower end of the multi-side clamper support (201) is fixedly connected with an overturn-preventing supporting plate (202).
4. An eyeglass lens processing technology according to claim 2, characterized in that: the multi-side clamping device support (201) is connected with a transmission frame (301) in a sliding mode, and the transmission frame (301) is in transmission connection with two transmission wheels (403).
5. An eyeglass lens processing technology according to claim 4, characterized in that: the transmission frame (301) is fixedly connected with a bottom flexible clamping bracket (302), and the bottom flexible clamping bracket (302) is connected with the lower sides of the glasses lenses through elastic gaskets.
6. An eyeglass lens processing technology according to claim 5, characterized in that: fixedly connected with articulated frame (203) on multilateral binding clasp support (201), swing joint has movable gear shaft (204) on articulated frame (203), and sliding connection has hollow rack plate (501) on articulated frame (203), and movable gear shaft (204) are connected with hollow rack plate (501) and driving frame (301) transmission, install upper portion flexible clamp bracket (502) on hollow rack plate (501), and upper portion flexible clamp bracket (502) passes through the elastic gasket with the upside of glasses lens and is connected.
7. An eyeglass lens processing technology according to claim 6, characterized in that: an elastic limiting plate (503) is fixedly connected to the upper flexible clamping bracket (502), and the elastic limiting plate (503) is matched with the lower end of the side part of the spectacle lens in an attaching mode.
8. The eyeglass lens processing process of claim 2, wherein: the multi-side clamping device support (201) is provided with two polishing grinders (601) through a control frame, and the two polishing grinders (601) are respectively used for polishing and grinding the upper side and the lower side of the spectacle lens.
9. An eyeglass lens processing technology according to claim 8, characterized in that: the polishing sander (601) is provided with a plurality of polishing paste retaining grooves (602).
10. The spectacle lens processed by the spectacle lens processing technology according to claim 1, characterized in that: the pair of the glasses lenses (102) is used, the two glasses lenses (102) are connected through the frame (101), and the frame (101) is installed in the frame installation groove on the glasses lenses (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173073.5A CN114434220A (en) | 2022-02-24 | 2022-02-24 | Glasses lens and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173073.5A CN114434220A (en) | 2022-02-24 | 2022-02-24 | Glasses lens and processing technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114434220A true CN114434220A (en) | 2022-05-06 |
Family
ID=81374022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210173073.5A Withdrawn CN114434220A (en) | 2022-02-24 | 2022-02-24 | Glasses lens and processing technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114434220A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3841493A1 (en) * | 1988-12-09 | 1990-06-13 | Wernicke & Co Gmbh | Device for the edge-working of spectacle lenses |
| CN1454137A (en) * | 2000-05-26 | 2003-11-05 | 庄臣及庄臣视力保护公司 | Process for the automated manufacture of spectacle lenses |
| JP2007181889A (en) * | 2006-01-05 | 2007-07-19 | Nidek Co Ltd | Glass lens working system |
| CN101437652A (en) * | 2006-05-10 | 2009-05-20 | 埃西勒国际通用光学公司 | Method and device for trimming a lens by cutting said lens |
| CN103959143A (en) * | 2011-11-30 | 2014-07-30 | 埃西勒国际通用光学公司 | Method of preparing an ophthalmic lens |
| CN111958393A (en) * | 2020-08-17 | 2020-11-20 | 何福生 | Quick molding equipment that polishes of hyperopia glasses substrate |
-
2022
- 2022-02-24 CN CN202210173073.5A patent/CN114434220A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3841493A1 (en) * | 1988-12-09 | 1990-06-13 | Wernicke & Co Gmbh | Device for the edge-working of spectacle lenses |
| CN1454137A (en) * | 2000-05-26 | 2003-11-05 | 庄臣及庄臣视力保护公司 | Process for the automated manufacture of spectacle lenses |
| JP2007181889A (en) * | 2006-01-05 | 2007-07-19 | Nidek Co Ltd | Glass lens working system |
| CN101437652A (en) * | 2006-05-10 | 2009-05-20 | 埃西勒国际通用光学公司 | Method and device for trimming a lens by cutting said lens |
| CN103959143A (en) * | 2011-11-30 | 2014-07-30 | 埃西勒国际通用光学公司 | Method of preparing an ophthalmic lens |
| CN111958393A (en) * | 2020-08-17 | 2020-11-20 | 何福生 | Quick molding equipment that polishes of hyperopia glasses substrate |
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Application publication date: 20220506 |