CN110389433B - A bidirectionally adjustable surgical microscope observation head - Google Patents
A bidirectionally adjustable surgical microscope observation head Download PDFInfo
- Publication number
- CN110389433B CN110389433B CN201910786292.9A CN201910786292A CN110389433B CN 110389433 B CN110389433 B CN 110389433B CN 201910786292 A CN201910786292 A CN 201910786292A CN 110389433 B CN110389433 B CN 110389433B
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- seat
- moving block
- hand wheel
- composite prism
- shaped groove
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- 239000002131 composite material Substances 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 210000001747 pupil Anatomy 0.000 description 10
- 210000003128 head Anatomy 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/18—Arrangements with more than one light path, e.g. for comparing two specimens
- G02B21/20—Binocular arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/24—Base structure
- G02B21/248—Base structure objective (or ocular) turrets
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
Abstract
The invention discloses a surgical microscope observation head capable of being adjusted in two directions, which comprises a seat and hinge lens seats symmetrically arranged at two sides of the upper end of the seat, wherein a steering lens seat is arranged between the hinge lens seats, the upper end of the steering lens seat is rotationally connected with a rotating seat through a supporting shaft, two composite lens seats are arranged on the rotating seat, the lower ends of the two composite lens seats are rotationally arranged on the steering lens seat, and a transmission component for driving the two composite lens seats to rotate is also arranged on the steering lens seat.
Description
Technical Field
The invention relates to the technical field of medical microscope equipment, in particular to a surgical microscope observation head capable of being adjusted in two directions.
Background
The medical microscope is widely applied to various fields of ophthalmology, otorhinolaryngology, stomatology, surgical department, neurosurgery, gynecology and the like. The distance between the eyepieces needs to be changed for different operators due to the variability of the interpupillary distances of each person by the person operating the medical microscope. The pupil distance of a person is approximately 48mm-78mm, so that the ocular lens must be adjusted steplessly in the range, and the pupil distance is convenient for operators to use. Most of operation of the operation microscope is used in operation of doctors, and the doctors have the requirements of sterilizing instruments and equipment and are stable and convenient to operate. Along with the development of medical technology, the requirements on the precision, comfort and the like of instruments are also improved.
The existing single-hand wheel pupil distance adjusting mechanism comprises a left composite prism seat and a right composite prism seat, wherein a screw sleeve with positive and negative threads is fixedly connected to the bottoms of the two composite prism seats, an operation cross rod transversely penetrates through the screw sleeves on the two sides, a left external thread and a right external thread are arranged on the operation cross rod, when an operation knob rotates, the two composite prism seats are opened and closed in a moving range by the aid of the threads, and further pupil distance adjustment is achieved.
In order to further facilitate operation and improve the precision and comfort of products, a single-hand wheel interpupillary distance adjusting mechanism with a compact structure is developed, the single-hand wheel is used as a main part, meanwhile, a single-hand can be used for pulling a left or right composite lens seat for operation, a hand wheel part is provided with a sterilizable silica gel sleeve, a doctor can use the silica gel sleeve in the operation process, the sterilization on the hand wheel can be directly operated, and the composite lens seat can be directly pulled for adjustment under the condition of no sterilization.
Disclosure of Invention
The present invention is directed to a surgical microscope viewing head capable of being adjusted in two directions, so as to solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The surgical microscope observation head capable of being adjusted in two directions comprises a seat and hinge lens seats symmetrically arranged at two sides of the upper end of the seat, a steering lens seat is arranged between the hinge lens seats, a fixed shaft at two ends of the steering lens seat is rotationally connected with the hinge lens seats, the steering lens seats can be rotationally connected around the fixed shaft, the upper end of the steering lens seat is rotationally connected with a rotating seat through a supporting shaft, two composite prism seats are arranged on the rotating seat, a lens cone is arranged at the upper end of each composite prism seat, an eyepiece which is convenient for workers to observe is arranged at the upper end of each lens cone, the lower ends of the two composite prism seats are rotationally arranged on the steering lens seats, and a transmission assembly for driving the two composite prism seats to rotate is further arranged on the steering lens seats;
The transmission assembly comprises a main fixing seat arranged on the rotating seat, a cover plate is detachably arranged at the upper end of the main fixing seat, two sliding grooves which are horizontally staggered are formed in the main fixing seat, a U-groove moving block is slidably matched in each sliding groove, a U-groove corresponding to the composite prism seat is formed in one side surface of each U-groove moving block, racks are connected to the other side surface of each U-groove moving block through a buckle assembly, a fixing frame is further erected on the surface of the main fixing seat where the U-groove moving block is located, a gear piece is arranged in a penetrating way in a mounting hole in the fixing frame, and the gear part of the gear piece is meshed with the two racks on the U-groove moving block;
And a linkage mechanism is arranged between each U-groove moving block and the corresponding composite prism seat, and the linkage mechanism is used for applying a rotating force to the composite prism seat in cooperation with the U-groove moving blocks so as to drive the composite prism seat to turn.
As a further scheme of the invention, the end part of the gear piece is detachably provided with a hand wheel convenient to hold.
As a further proposal of the invention, the shaft part of the gear piece is rotationally connected with the fixing frame through a bearing.
As a further scheme of the invention, the linkage mechanism comprises a swinging shaft with one end fixedly connected with the composite prism seat, the other end of the swinging shaft is of a rod-shaped structure, and the surface of the U-shaped groove moving block is provided with a U-shaped groove which is convenient for embedding the rod-shaped structure.
As a further scheme of the invention, the buckle assembly comprises a cylindrical block arranged on the rack and a cylindrical groove arranged on the U-groove moving block, and the cylindrical groove is matched with the cylindrical block.
As a further scheme of the invention, a silica gel disinfection sleeve is sleeved on the hand wheel.
As a further scheme of the invention, one end of the cover plate is fixed above the middle of the left composite prism seat and the right composite prism seat by using screws, the other end of the cover plate is connected with the main fixing seat, the bottom of the main fixing seat is fixed with the connecting block by using screws, and the connecting block is fixed on the rotating seat by using screws.
As a further scheme of the invention, a scale mark is arranged in the middle of one side of the cover plate close to the hand wheel, and a circle of scale ring is arranged at the end of the hand wheel close to the cover plate.
Compared with the prior art, the invention has the beneficial effects that 1, the invention can be operated by only one hand by using the single-hand wheel control, and is convenient and quick.
2. The invention uses a small-modulus precise mutual transmission mode of a gear rack with a second belt, not only can the pupil distance be adjusted by a single hand wheel in the middle, but also the pupil distance can be adjusted by pulling the left or right compound prism seat, and the gear is driven by the rack, so that the operation is convenient, the functionality is ensured, and the invention is suitable for different operation requirements.
3. The invention uses small-module gear rack transmission, and the rotation is easy and the movement process is comfortable through grinding and matching.
4. The invention has compact structure, the single hand wheel is positioned in the shared space of the left and right observation groups, the integrity is strong, and the appearance is small.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic diagram of an exploded structure of a transmission member in the present invention.
Fig. 4 is a partial enlarged view of the relationship between changes in interpupillary distance in the present invention.
Fig. 5 is a schematic structural diagram of a transmission component and a composite prism seat in the present invention.
The device comprises a cover plate 1, a main fixing seat 2, a fixing frame 3, a hand wheel 4, a gear piece 5, a rack 6, a U-groove moving block 7, a connecting block 8, a swinging shaft 9, a sterilizing sleeve 10, an eyepiece 11, a lens barrel 12, a composite prism seat 13, a rotating seat 14, a steering mirror seat 15, a hinge mirror seat 16 and a seat 17.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-5, in an embodiment of the present invention, a surgical microscope observation head capable of being adjusted in two directions includes a seat 17 and hinge lens holders 16 symmetrically disposed at two sides of an upper end of the seat, a steering lens holder 15 is disposed between the hinge lens holders 16, a fixed shaft at two ends of the steering lens holder 15 is rotatably connected with the hinge lens holder 16, the steering lens holder 15 is rotatably connected with a rotation seat 14 around the fixed shaft, two composite prism holders 13 are disposed on the rotation seat 14 through a supporting shaft, a lens barrel 12 is disposed at an upper end of each composite prism holder 13, an eyepiece 11 for facilitating observation of a worker is disposed at an upper end of the lens barrel 12, lower ends of the two composite prism holders 13 are rotatably disposed on the steering lens holder 15, and a transmission assembly for driving the two composite prism holders 13 to rotate is further disposed on the steering lens holder 15;
as shown in fig. 3, the transmission assembly includes a main fixing seat 2 disposed on a rotating seat 14, a cover plate 1 is detachably disposed at an upper end of the main fixing seat 2, two sliding grooves disposed in a staggered manner are formed in the main fixing seat 2, a U-groove moving block 7 is slidably disposed in each sliding groove, a U-groove corresponding to the composite prism seat 13 is disposed on one side surface of each U-groove moving block 7, a rack 6 is connected to the other side surface of the U-groove moving block through a fastening assembly, a fixing frame 3 is further erected on the surface of the main fixing seat 2 where the U-groove moving block 7 is located, a gear member 5 is disposed in a mounting hole in the fixing frame 3 in a penetrating manner, a shaft portion of the gear member 5 is rotatably connected with the fixing frame 3 through a bearing, a gear portion of the gear member 5 is meshed with two racks 6 on the U-groove moving block 7, a hand wheel 4 convenient to hold is detachably disposed at an end of the gear member 5, and the two racks 6 are disposed on upper and lower sides of the gear member 5 in a staggered manner so that under the gear transmission, the two racks 6 can drive the U-groove moving block 7 to move relatively;
And a linkage mechanism is arranged between each U-groove moving block 7 and the corresponding composite prism seat 13, and the linkage mechanism is used for applying a rotating force to the composite prism seat 13 to drive the composite prism seat 13 to turn to drive the composite prism seat 13 to rotate in cooperation with the U-groove moving blocks 7, so that the adjustment of the distance between the two ocular lenses 11 is completed.
The linkage mechanism comprises a swinging shaft 9 with one end fixedly connected with the composite prism seat 13, the other end of the swinging shaft 9 is of a rod-shaped structure, a U groove convenient for embedding the rod-shaped structure is formed in the surface of the U groove moving block 7, and when the U groove moving block 7 slides, the U groove can generate an acting force on the rod-shaped structure, so that driving force is provided for rotation of the composite prism seat 13.
The buckle subassembly is including setting up the cylindricality piece on rack 6 and setting up the cylindricality groove on U groove movable block 7, cylindricality groove and cylindricality piece mutually support, when actual installation, insert the cylindricality piece in the cylindricality groove to accomplish the detachable connection of rack 6 and U groove movable block 7.
The hand wheel 4 is sleeved with a silica gel disinfection sleeve 10.
One end of the cover plate 1 is fixed on the upper part of the middle of the left and right composite prism seat 13 by screws, the other end of the cover plate is connected with the main fixing seat 2, the bottom of the main fixing seat 2 is fixed with the connecting block 8 by screws, and the connecting block 8 is fixed on the rotating seat 14 by screws.
The following is the calculation of the interpupillary distance, as shown in fig. four.
L is 1/2 of the interpupillary distance;
The horizontal distance from the rotation center O of the left prism seat to the hand wheel shaft is D;
the distance from the rotation center O of the left prism seat to the center O1 of the fixed shaft is b;
the distance from the rotation center O of the left prism seat to the center O2 of the ocular lens is a;
The distance from the eyepiece center O2 to the fixed shaft O1 is c;
a. b and c are constants, and included angles among a, b and c are also constants;
and the included angle between b and the axis of the horizontal hand wheel is alpha, wherein alpha is positive when the pupil distance is increased and alpha is negative when the pupil distance is reduced by taking the axis of the horizontal hand wheel as a reference.
The radius of the gear base circle is r;
When the hand wheel rotates by delta theta, the gear also rotates by delta theta, the meshing moving distance of the rack is delta theta x r, and the moving distance perpendicular to the hand wheel shaft is equal to the moving distance of the fixed shaft and is also delta theta x r;
Taking the axis of the horizontal hand wheel as a reference, and the rotation angle of the hand wheel is delta theta;
the following function is obtained by conversion:
L=a+sin (pi- β+arcsin (Δθ r/b)) +d angular units are radians;
The interpupillary distance is 2L due to bilateral symmetry.
Pupil distance 2l=2 (a×sin (pi- β+arcsin (Δθ×r/b)) +d;
The variation interval of the interpupillary distance 2L is {48,78} mm, N sub-intervals are equally divided, N numerical values of the interpupillary distance 2L can be obtained, and N numerical values of D and delta theta are correspondingly obtained. These values are tabulated and plotted on a hand wheel to identify interpupillary distance.
Example 2
The cover plate 1 is provided with a scale mark in the middle of one side close to the hand wheel 4, the end of the hand wheel 4 close to the cover plate 1 is provided with a circle of scale ring, and when the hand wheel 4 is rotated, the scale mark on the cover plate 1 corresponds to the reading on the scale ring of the hand wheel 4 to obtain the pupil distance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a but operation microscope observation head of two-way adjustment, includes seat (17) and symmetry set up hinge mirror seat (16) of upper end both sides, be equipped with between hinge mirror seat (16) and turn to mirror seat (15), the fixed axle and the hinge mirror seat (16) at turn to mirror seat (15) both ends rotate to be connected, turn to mirror seat (15) and can rotate around the fixed axle to be connected, turn to mirror seat (15) upper end and rotate through the back shaft to be connected with one and rotate seat (14), be equipped with two compound prism seat (13) on rotating seat (14), every compound prism seat (13) upper end all is equipped with lens cone (12), lens cone (12) upper end is equipped with eyepiece (11) that are convenient for the staff to observe, two compound prism seat (13) lower extreme rotation sets up on turning to mirror seat (15), still be equipped with on turning to be used for driving two compound prism seat (13) pivoted drive assembly;
The novel transmission mechanism is characterized in that the transmission assembly comprises a main fixing seat (2) arranged on a rotating seat (14), a cover plate (1) is detachably arranged at the upper end of the main fixing seat (2), two sliding grooves which are horizontally staggered are formed in the main fixing seat (2), a U-shaped groove moving block (7) is slidably matched in each sliding groove, a U-shaped groove corresponding to a composite prism seat (13) is formed in one side surface of each U-shaped groove moving block (7), racks (6) are connected to the other side surface of each U-shaped groove moving block through a buckle assembly, a fixing frame (3) is further erected on the surface of the main fixing seat (2) where the U-shaped groove moving block (7) is located, a gear piece (5) is arranged in a penetrating mode in a mounting hole in the fixing frame (3), and a gear part of the gear piece (5) is meshed with the two racks (6) on the U-shaped groove moving block (7);
A linkage mechanism is arranged between each U-groove moving block (7) and the corresponding composite prism seat (13), and the linkage mechanism is used for applying a rotating force to the composite prism seat (13) by matching with the U-groove moving blocks (7) so as to drive the composite prism seat (13) to turn;
the linkage mechanism comprises a swinging shaft (9) with one end fixedly connected with the composite prism seat (13), the other end of the swinging shaft (9) is of a rod-shaped structure, and the surface of the U-shaped groove moving block (7) is provided with a U-shaped groove which is convenient for embedding the rod-shaped structure;
the buckle assembly comprises a cylindrical block arranged on the rack (6) and a cylindrical groove arranged on the U-groove moving block (7), and the cylindrical groove is matched with the cylindrical block.
2. Surgical microscope viewing head according to claim 1, characterized in that the gear part (5) is provided with a hand wheel (4) at the end which is detachable for easy handling.
3. A bidirectionally adjustable surgical microscope viewing head according to claim 1, characterized in that the shaft portion of the gear element (5) is rotatably connected to the holder (3) via a bearing.
4. The bidirectionally adjustable surgical microscope viewing head according to claim 2, wherein the hand wheel (4) is provided with a silicone sterilization sleeve (10).
5. The surgical microscope observation head capable of being adjusted in two directions according to claim 1, wherein one end of the cover plate (1) is fixed above the middle of the left and right composite prism seats (13) by a screw, the other end of the cover plate is connected with the main fixing seat (2), the bottom of the main fixing seat (2) is fixed with the connecting block (8) by a screw, and the connecting block (8) is fixed on the rotating seat (14) by a screw.
6. The surgical microscope observation head capable of being adjusted in two directions according to claim 2, wherein a scale mark is arranged in the middle of one side of the cover plate (1) close to the hand wheel (4), and a circle of scale ring is arranged at the end of the hand wheel (4) close to the cover plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786292.9A CN110389433B (en) | 2019-08-23 | 2019-08-23 | A bidirectionally adjustable surgical microscope observation head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910786292.9A CN110389433B (en) | 2019-08-23 | 2019-08-23 | A bidirectionally adjustable surgical microscope observation head |
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| Publication Number | Publication Date |
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| CN110389433A CN110389433A (en) | 2019-10-29 |
| CN110389433B true CN110389433B (en) | 2025-01-24 |
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Citations (2)
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| CN210323557U (en) * | 2019-08-23 | 2020-04-14 | 桂林视百科光电科技有限公司 | Operation microscope observation head capable of being adjusted in two directions |
| CN218848428U (en) * | 2022-11-11 | 2023-04-11 | 茂莱（南京）仪器有限公司 | Electric pupil distance adjusting mechanism with reserved manual adjustment function |
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| FR461885A (en) * | 1913-08-26 | 1914-01-13 | Lacour Berthiot Des Ets | Device for adjusting the spacing of the eyepieces in binocular spotting scopes |
| GB135752A (en) * | 1919-08-12 | 1919-12-04 | John Henry Barton | Improvements in Prism Field and Theatre Binoculars. |
| DE364747C (en) * | 1922-03-15 | 1922-12-01 | Berth & Neumann Werkstaetten F | Binoculars |
| GB843888A (en) * | 1958-06-26 | 1960-08-10 | Arthur Abbey | Improvements in or relating to stereoscopic microscopes |
| US6544193B2 (en) * | 1996-09-04 | 2003-04-08 | Marcio Marc Abreu | Noninvasive measurement of chemical substances |
| US7131727B2 (en) * | 2003-06-30 | 2006-11-07 | Johnson & Johnson Vision Care, Inc. | Simultaneous vision emulation for fitting of corrective multifocal contact lenses |
| CN200979614Y (en) * | 2006-10-16 | 2007-11-21 | 佛山市南海祥旺光学电子制品有限公司 | A focusing telescope with double control by hand wheel |
| CN201569785U (en) * | 2009-11-10 | 2010-09-01 | 陈锷云 | Binoculars |
| CN107588170B (en) * | 2017-09-08 | 2021-05-18 | 联想(北京)有限公司 | Electronic equipment and distance adjusting mechanism thereof |
| CN207281370U (en) * | 2017-10-18 | 2018-04-27 | 长沙得悦科技发展有限公司 | Interpupillary distance adjusting part and microscope |
| CN109782426A (en) * | 2017-11-10 | 2019-05-21 | 创新服务股份有限公司 | 3D medical treatment microscope |
| CN108802987A (en) * | 2018-06-01 | 2018-11-13 | 长沙得悦科技发展有限公司 | A kind of accurate interpupillary adjustment mechanism of surgical operation microscope |
| CN109975968A (en) * | 2019-04-18 | 2019-07-05 | 深圳市爱科学教育科技有限公司 | A kind of stereomicroscope with full filed angle stereovision function |
| CN110007454A (en) * | 2019-05-08 | 2019-07-12 | 桂林视百科光电科技有限公司 | A kind of full balance varifocus objective for surgical operation microscope |
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2019
- 2019-08-23 CN CN201910786292.9A patent/CN110389433B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210323557U (en) * | 2019-08-23 | 2020-04-14 | 桂林视百科光电科技有限公司 | Operation microscope observation head capable of being adjusted in two directions |
| CN218848428U (en) * | 2022-11-11 | 2023-04-11 | 茂莱（南京）仪器有限公司 | Electric pupil distance adjusting mechanism with reserved manual adjustment function |
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| CN110389433A (en) | 2019-10-29 |
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