CN108227454B - Double-layer calendar mechanism of clock - Google Patents
Double-layer calendar mechanism of clock Download PDFInfo
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- CN108227454B CN108227454B CN201611199950.7A CN201611199950A CN108227454B CN 108227454 B CN108227454 B CN 108227454B CN 201611199950 A CN201611199950 A CN 201611199950A CN 108227454 B CN108227454 B CN 108227454B
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- calendar
- sun
- ring
- changing
- wheel
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
- G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
- G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
- G04B19/253—Driving or releasing mechanisms
- G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
- G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
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- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
The invention discloses a double-layer calendar mechanism of a clock, which comprises a day-changing wheel assembly, two vertically-superposed calendar rings and a positioning block for radially positioning the calendar rings, wherein the two calendar rings are arranged on the same side; the sun-changing wheel assembly drives the calendar rings which are overlapped up and down to rotate respectively; the sun rapid shifting wheel or sun switching intermediate wheel is meshed with the sun switching wheel assembly to finish time-consuming sun switching or rapid shifting of the sun. The beneficial effects are that: the fonts displayed by the calendar are increased by adopting a two-layer calendar ring structure; the calendar ring is of a flat layer structure, and the processing is simple; in addition, each calendar ring is respectively provided with two positioning blocks, and no matter the gear ring is in a tooth missing state, the positioning blocks play a role in radial positioning. The calendar is characterized in that the calendar running and quick-dialing parts share one set of day-changing mechanism, which is different from the existing calendar ring structure, not only improves the reliability of the mechanism and simplifies the process, but also saves the space in the plane layout and reduces the axial dimension. The mechanism has the advantages of simple structure, convenient processing, reduced number of parts and simplified processing procedures.
Description
Technical Field
The invention relates to a double-layer calendar display mechanism of a clock, in particular to a double-layer calendar ring large character display mechanism of the clock.
Background
The date display of a timepiece relies on a calendar ring provided with 31 sectors carrying a marking 1 to 31 containing different dates. However, a disadvantage of this type of watch is that the calendar display area is only an area of thirty-one-half the circumferential size of the calendar ring. In a wristwatch of small size, the size of such an area does not meet the requirements for clear display.
Aiming at the problem, the prior publication No. CN1621974B and publication No. CN1621975B disclose a technical scheme with two calendar rings, which effectively solves the defect that dates cannot be clearly displayed, the two patents respectively act on a time-moving and needle-pulling mechanism of the same watch movement, the patent publication No. CN1621974B describes the time-moving part of the watch movement, the patent publication No. CN1621975B describes the needle-pulling part of the watch movement, a calendar ring gear is made into two layers in the structure, and each layer is provided with a thin tooth which can be separated from a day-changing wheel and a quick-pulling wheel respectively so as to finish the actions of time-moving, day-changing and quick-pulling. The gaps among the structural parts are too small, so that unreliable conditions such as interference affecting the normal operation of the mechanism and the like can be generated, and meanwhile, the manufacturing difficulty is increased, so that the production requirement is not facilitated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the double-layer calendar mechanism of the clock with simple component processing and convenient installation.
The technical scheme adopted by the invention is as follows: a double-layer calendar mechanism of a timepiece includes a date changing wheel assembly, two calendar rings stacked one above the other, and a positioning block having a radial positioning for the calendar rings; the sun-changing wheel assembly drives the calendar rings which are overlapped up and down to rotate respectively; the sun rapid shifting wheel or sun switching intermediate wheel is meshed with the sun switching wheel assembly to finish time-consuming sun switching or rapid shifting of the sun.
The two calendar rings are of flat layer structure, a layer of gear ring is arranged in each calendar ring, each calendar ring is a circumferential gear ring formed by regularly spaced teeth, and a missing tooth is arranged in each gear ring.
The two calendar rings are respectively provided with two positioning blocks and corresponding positioning springs, and the two positioning blocks are respectively provided with 4 teeth to radially position the calendar rings.
The two calendar rings are a first calendar ring and a second calendar ring; the lower surface of the first calendar ring is provided with a single nail in a protruding way, the upper surface of the second calendar ring is provided with two single nails in a protruding way, the upper and lower nails collide or separate, and the upper and lower nails can stop the calendar rings in the moving process of the two calendar rings; two shifting heads in the sun gear replacement component are respectively meshed with or disengaged from inner teeth of the first calendar ring and the second calendar ring.
The sun-changing wheel assembly comprises a first sun-changing shifting head, a second sun-changing shifting head, a sun-changing gear shaft and a sun-changing wheel sheet in friction fit with the sun-changing gear shaft, which are integrated by pressing; the first day-changing shifting head and the second day-changing shifting head respectively shift the first calendar ring and the second calendar ring.
When the sun is moved and changed, the double-hour wheel in the hour wheel and the double-hour wheel which are integrated by pressing is meshed with the sun-changing intermediate wheel, and the sun-changing intermediate wheel is meshed with the sun-changing wheel sheet to drive the sun-changing wheel assembly B to rotate; when the sun is quickly shifted, the dial wheel is meshed with the sun quick dial wheel, and the sun quick dial wheel is meshed with the sun shifting gear shaft to drive the sun shifting wheel assembly B to rotate.
The first calendar ring comprises sixteen sections with fifteen consecutive marks in 31 positions of a cycle, respectively, a sixteenth section being an additional section that is open or has a transparent aperture; the second calendar ring contains seventeen sections with sixteen further marks in 31 positions of a cycle, respectively, the seventeenth section being an additional section.
The three points of the calendar ring are provided with a hollowed calendar window.
The beneficial effects of the invention are as follows: 1. the font of calendar display is increased due to the adoption of a two-layer calendar ring structure; the calendar ring is of a flat layer structure, so that the processing is simpler;
2. the novel positioning mode is adopted, namely, each calendar ring is respectively provided with two positioning blocks, the two positioning blocks are respectively provided with 4 teeth in two layers, and no matter how the gear ring is in a tooth missing operation to any position, the positioning blocks play a role in radial positioning.
3. The mechanism is completed by adopting a set of sun-changing mechanism shared by the calendar time-moving part and the quick-dialing part, and is different from the existing calendar ring structure, so that the reliability of the mechanism is improved, the process is simplified, meanwhile, the space is saved on the plane layout, and the axial dimension is reduced. The mechanism has the advantages of simple structure, convenient processing, reduced number of parts and simplified processing procedures.
Drawings
FIG. 1 is a plan view of the structure of the present invention;
FIG. 2 is an axial block diagram of the travel time section of the present invention;
FIG. 3 is an axial block diagram of the shifting needle portion of the present invention;
FIG. 4 is a perspective view of a first tier calendar ring of the present invention;
FIG. 5 is a perspective view of a second tier calendar ring of the present invention;
FIG. 6 is a plan view showing the structure of a calendar window at 31 days;
FIG. 7 is a plan view showing the structure of a calendar window at 1 day;
FIG. 8 is a plan view of the calendar window showing 16 days of construction;
FIG. 9 is a plan view showing the structure of a calendar window at 17 days;
FIG. 10 is a schematic view of the calendar window display at 6 and 7 days of the position of the second positioning block;
FIG. 11 is a schematic view of the calendar window display at the 8 and 9 day time positions of the second positioning block;
FIG. 12 is a schematic view of the location of the first positioning block at days 18 and 19 of the calendar window display;
fig. 13 is a schematic view of the location of the first positioning block at days 20 and 21 of the calendar window display.
In the figure:
1. setting wheel 2, jumper wheel part A, double hour wheel part
3. Hour wheel 4, double hour wheel 5, sun-changing intermediate wheel
B. Day changing wheel assembly 6, day changing wheel sheet 7a, first day changing dial
7b, a second sun gear-changing head 8, a sun gear-changing shaft C, a first calendar ring member
9. First calendar ring D, second calendar ring member 10, second calendar ring
11. Day speed dial 13, first position nail 14, second position nail
15. Third position nail 16 perspective window 17a first positioning block 1
17b. First positioning block 2 18a. Second positioning block 1 18b. Second positioning block 2
19a, first positioning spring 19b, second positioning spring 20, missing tooth a 21, missing tooth b.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1 to 5, the double-layer calendar mechanism for a timepiece of the present invention includes a setting wheel 1, a jumper section 2, a double hour wheel section a, a sun wheel 5, a sun wheel assembly B, a first calendar ring section C, a second calendar ring section D, a sun pinion 11, a first positioning block 1 17a, a first positioning block 2 17B, a second positioning block 1 18a, a second positioning block 2 18B, a first positioning spring 19a and a second positioning spring 19B provided in a movement.
The double-hour wheel component A comprises an hour wheel 3 and a double-hour wheel 4 which are integrated by pressing; the sun-changing wheel assembly B comprises a first sun-changing shifting head 7a, a second sun-changing shifting head 7B, a sun-changing gear shaft 8 and a sun-changing wheel sheet 6 in friction fit with the sun-changing gear shaft 8 which are integrated by pressing; the first calendar ring component C comprises a first calendar ring 9 and a first position nail 13 which are integrated by pressing, and the first position nail 13 protrudes out of the lower plane of the first calendar ring 9; the inner ring of the first calendar ring 9 is a circumferential gear ring formed by regularly spaced teeth and provided with a missing tooth a 20; the first calendar ring 9 comprises sixteen sections, the fifteen sections are sequentially provided with numerals 17-31, the sixteenth section is a perspective window 16, and the sixteenth section is an additional section with a transparent opening; the second calendar ring member D includes a second calendar ring 10, a second peg 14 and a third peg 15 which are integrally press-fitted, and the second peg 14 and the third peg 15 protrude from the upper surface of the second calendar ring 10; the inner ring of the second calendar ring 10 is a circumferential toothing consisting of regularly spaced teeth and having a missing tooth b 21, the second calendar ring 10 comprises seventeen sectors, numbered 1-16 in sequence, the seventeenth sector being a blank additional sector.
The first position nail 13 on the first calendar ring 9, the second position nail 14 and the third position nail 15 on the second calendar ring 10 interact to push the static calendar rings to rotate together in the conversion process of the two calendar rings; the two identical first positioning blocks 1 17a and the first positioning blocks 2 17b act on 4 teeth of the first calendar ring 9 at the same time to radially position the first calendar ring 9, and the two identical first positioning springs 19a act on the first positioning blocks 1 and 17a and the first positioning blocks 2 17b respectively to enable the first calendar ring 9 to be quickly reset; the two identical second positioning blocks 1 a and 2 b simultaneously act on 4 teeth on the second calendar ring 10 to radially position the second calendar ring 10; two identical second positioning springs 19b respectively act on the second positioning block 1 18a and the first positioning block 2 18b, so that the two positioning springs can be quickly reset; the first day changing shifting head 7a acts with the inner teeth of the first calendar ring 9, and when the first day changing shifting head is in a meshing position with the missing teeth a 20, the first calendar ring 9 is in a static state; the second date changing hub 7b is in contact with the inner teeth of the second date ring 10, and the second date ring 10 is in a stationary state when the second date ring is in a position engaged with the missing teeth b 21.
The working process of the double-layer calendar mechanism of the clock is as follows:
as shown in fig. 2:
the calendar running process is only exemplified by clockwise rotation indication of the calendar mechanism, and anticlockwise rotation indication of the date is only needed by reverse design of the corresponding mechanism and transmission, which can be easily obtained by the skilled person through the following examples. The power transmitted by the machine core drives the double-time wheel component A to rotate clockwise, thereby driving the sun-changing intermediate wheel 5 to rotate anticlockwise, the sun-changing intermediate wheel 5 is meshed with the sun-changing wheel piece 6, and further driving the sun-changing wheel component B to rotate clockwise, so that the first sun-changing shifting head 7a or the second sun-changing shifting head 7B on the sun-changing intermediate wheel is meshed with the inner teeth on the corresponding first calendar ring 9 or second calendar ring 10, and further driving the first calendar ring 9 or the second calendar ring 10 to jump forwards for an interval.
The calendar is displayed with a hollowed calendar window at three points which are not marked in the figure. As shown in fig. 6, the current first calendar ring 9 is a display ring, the calendar window display number is 31, and the missing teeth 21 of the second calendar ring 10 are in the engaged position with the second date changing dial 7b. At this time, the first day changing dial 7a is engaged with the inner teeth of the first calendar ring 9, and drives the first calendar ring 9 to rotate clockwise for one interval. In operation, the first pins 13 of the first calendar ring 9 interact with the second pins 14 of the second calendar ring 10 to push the second calendar ring 10 to rotate clockwise for one interval, the transparent window of the first calendar ring 9 is shifted to the position of the calendar window, and the calendar window display number is 1. (see FIG. 7)
As shown in fig. 7, when the second calendar ring 10 is a display ring, the missing teeth 20 of the first calendar ring 9 are at the engagement position with the first date changing dial 7a, and at this time, the first calendar ring 9 is in a stationary state. When the sun gear assembly B rotates clockwise, the second sun gear shifting head 7B is meshed with the inner teeth of the second calendar ring 10, the second calendar ring 10 is driven to rotate clockwise, and the calendar windows sequentially display numerals 1-16.
In the process that the calendar windows sequentially display 1-16, when the display number is 1-5, the second positioning block 1 18a and the second positioning block 2 18b simultaneously act on 4 teeth of the second calendar ring 10 to radially position the second calendar ring 10; when the display numerals are 6 and 7, the second positioning block 2 18b acts on two teeth of the second calendar ring 10 to radially position the second calendar ring 10, and the second positioning block 1 18a is not active, as shown in fig. 10; when the numbers 8,9 are shown, the second positioning block 1 18a acts on two teeth of the second calendar ring 10, positioning the second calendar ring 10 radially, the second positioning block 2 18b being inactive, as shown in fig. 11; when the number 10-16 is shown, the second positioning block 1 18a and the second positioning block 2 18b act simultaneously on the 4 teeth of the second calendar ring 10, radially positioning the second calendar ring 10.
As shown in fig. 8, the calendar window displays the number 16, at this time, the sun wheel assembly B rotates clockwise, the second sun changing dial 7B drives the second calendar ring 10 to rotate clockwise for one interval, at this time, the third nail 15 of the second calendar ring 10 acts with the first nail 13 of the first calendar ring 9 to drive the first calendar ring 9 to rotate clockwise for one interval, the calendar window displays the number 17, then as shown in fig. 9, the missing tooth 21 of the second calendar ring 10 is in the engaged position with the second sun changing dial 7B, and at this time, the second calendar ring 10 is in the stationary state. The first calendar ring 9 is a display ring, and the calendar window sequentially displays numerals 17 to 31.
In the process of displaying 17-31 in the calendar window, when the display number is 17, the first positioning block 1 17a and the first positioning block 2 17b simultaneously act on 4 teeth of the first calendar ring 9 to radially position the first calendar ring 9; when the display numerals are 18 and 19, the first positioning block 2 17b acts on two teeth of the first calendar ring 9 to radially position the first calendar ring 9, and the first positioning block 1 17a is not active, as shown in fig. 12; when the display numerals are 20 and 21, the first positioning block 1 17a acts on two teeth of the first calendar ring 9 to radially position the first calendar ring 9, and the first positioning block 2 17b does not act, as shown in fig. 13; when the display numerals are 22-31, the first positioning block 17a and the first positioning block 2 17b simultaneously act on 4 teeth of the first calendar ring 9 to radially position the first calendar ring 9.
When the calendar window displays the number 31, the state shown in fig. 6 is returned, and one cycle is completed.
In the working process of the calendar setting needle transmission, the setting wheel 1 is driven to rotate clockwise by the power transmitted by external force and meshed with the day rapid setting wheel 11, so that the day changing gear shaft 8 meshed with the day rapid setting wheel 11 is driven to rotate clockwise, and the day changing wheel component B is driven to rotate clockwise, at the moment, the day changing wheel piece is static under the control of the meshing of the inner teeth of the machine core, and the day changing process is the same as the working process of the same calendar running time.
The calendar time transmission process is as follows: the movement motive power, the sun-changing intermediate wheel 5, the sun-changing wheel assembly B and the calendar ring. The calendar needle-pulling transmission process is as follows: external power, dial wheel 1, day quick dial wheel 11, day changing wheel component B and calendar ring. The calendar time transmission and the calendar pointer transmission are controlled by the day fast dial wheel 11 finally to switch the actions of the calendar ring.
The invention differs from the prior art in that: the calendar time transmission and the dial needle transmission control the working sequence of two calendar rings through the sun-changing wheel assembly B finally, and each calendar ring is provided with two positioning blocks for radial positioning. The advantage of this structure is: the parts of the multi-layer gear ring in the common mechanism are avoided, namely, the thickness of the machine core is reduced, the unreliability of the mechanism possibly caused by too small gap in the working process is also reduced, and the mechanism is good in manufacturability and convenient to assemble.
It should be noted that the scope of the present invention is not limited to the above specific embodiments, and the present invention can also have substantially the same structural transmission and adjust the layout of the structure according to the basic technical concept of the present invention. Firstly, other expression modes are adopted in the sun gear replacement assembly, and the aim of the invention can be still achieved; secondly, the calendar positioning block can adopt various expression modes; again, the form of interaction of the invention in the calendar ring may take on a variety of forms, as long as one of ordinary skill in the art does not have to carry out the inventive task, and any conceivable embodiment falls within the scope of protection of the invention.
Claims (7)
1. The double-layer calendar mechanism of the clock is characterized by comprising a day-changing wheel assembly, two calendar rings which are overlapped up and down and a positioning block which is used for positioning the calendar rings in a radial direction; the sun-changing wheel assembly drives the calendar rings which are overlapped up and down to rotate respectively; the sun rapid shifting wheel or the sun switching intermediate wheel is meshed with the sun switching wheel assembly to finish time-consuming sun switching or rapid shifting of the sun;
the two calendar rings are respectively provided with a layer of gear ring, each calendar ring comprises a circumferential gear ring formed by regularly spaced teeth, and each gear ring is internally provided with a tooth lack;
the two calendar rings are a first calendar ring and a second calendar ring, the lower surface of the first calendar ring and the upper surface of the second calendar ring are provided with position nails in a protruding mode, and in the moving process of the two calendar rings, the upper position nails and the lower position nails collide or are separated to stop the calendar rings;
the sun-changing wheel assembly comprises a first sun-changing shifting head (7 a) and a second sun-changing shifting head (7 b) which are integrated in a pressing mode, and the two sun-changing shifting heads are meshed with or disengaged from inner teeth of the first calendar ring and the second calendar ring respectively.
2. The timepiece double-layer calendar mechanism according to claim 1, wherein the two calendar rings are respectively acted on by two positioning blocks and corresponding positioning springs, and the two positioning blocks are respectively acted on 4 teeth, so as to be capable of radially positioning the calendar rings.
3. The double-layer calendar mechanism of timepiece according to claim 1, wherein a single peg is provided on a lower surface of the first calendar ring in a protruding manner, two pegs are provided on an upper surface of the second calendar ring in a protruding manner, and the upper and lower pegs collide or separate, and the upper and lower pegs can stop the calendar ring during movement of the two calendar rings.
4. The timepiece double-layer calendar mechanism according to claim 1, wherein the day changing wheel assembly further comprises a day changing gear shaft (8) and a day changing wheel plate (6) friction-fitted with the day changing gear shaft (8).
5. The double-layer calendar mechanism of the clock according to claim 4, wherein the hour wheel (3) and the double-hour wheel (4) in the double-hour wheel (4) which are integrated by pressing are meshed with the sun-changing wheel (5), and the sun-changing wheel (5) is meshed with the sun-changing wheel piece (6) to drive the sun-changing wheel assembly to rotate; when the sun is quickly shifted, the dial wheel (1) is meshed with the sun quick dial wheel (11), and the sun quick dial wheel (11) is meshed with the sun shifting gear shaft (8) to drive the sun shifting wheel assembly to rotate.
6. A timepiece bilayer calendar mechanism according to claim 3, wherein the first calendar ring comprises sixteen sectors, fifteen sectors each carrying fifteen consecutive marks in 31 positions of a cycle, the sixteenth sector being an additional sector open or having a transparent aperture; the second calendar ring contains seventeen sections with sixteen further marks in 31 positions of a cycle, respectively, the seventeenth section being an additional section.
7. The timepiece double-layer calendar mechanism according to claim 1, wherein the three points of the calendar ring have a hollowed calendar window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199950.7A CN108227454B (en) | 2016-12-22 | 2016-12-22 | Double-layer calendar mechanism of clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199950.7A CN108227454B (en) | 2016-12-22 | 2016-12-22 | Double-layer calendar mechanism of clock |
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| Publication Number | Publication Date |
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| CN108227454A CN108227454A (en) | 2018-06-29 |
| CN108227454B true CN108227454B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611199950.7A Active CN108227454B (en) | 2016-12-22 | 2016-12-22 | Double-layer calendar mechanism of clock |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3427798A (en) * | 1966-11-10 | 1969-02-18 | Hamilton Watch Co | Watch calendar setting mechanism |
| DE19845539A1 (en) * | 1998-10-02 | 2000-04-06 | Fortis Ag Grenchen | Wristwatch with large date display has indexing member which increments disc by two or more indexing teeth |
| CN101169620A (en) * | 2006-10-24 | 2008-04-30 | Eta瑞士钟表制造股份有限公司 | Annual calendar mechanism for timepiece |
| CN201060382Y (en) * | 2007-05-23 | 2008-05-14 | 杭州手表有限公司 | Dual-layer large calendar mechanism of timekeeper |
| CN1621974B (en) * | 2003-11-26 | 2013-03-27 | Eta瑞士钟表制造股份有限公司 | Timepiece with a date mechanism comprising two superposed date rings |
| CN206400276U (en) * | 2016-12-22 | 2017-08-11 | 天津海鸥表业集团有限公司 | Double-layer calendar mechanism for a timepiece |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1316858B1 (en) * | 2001-11-30 | 2008-01-23 | Rolex Sa | Date mechanism for timepiece |
-
2016
- 2016-12-22 CN CN201611199950.7A patent/CN108227454B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3427798A (en) * | 1966-11-10 | 1969-02-18 | Hamilton Watch Co | Watch calendar setting mechanism |
| DE19845539A1 (en) * | 1998-10-02 | 2000-04-06 | Fortis Ag Grenchen | Wristwatch with large date display has indexing member which increments disc by two or more indexing teeth |
| CN1621974B (en) * | 2003-11-26 | 2013-03-27 | Eta瑞士钟表制造股份有限公司 | Timepiece with a date mechanism comprising two superposed date rings |
| CN101169620A (en) * | 2006-10-24 | 2008-04-30 | Eta瑞士钟表制造股份有限公司 | Annual calendar mechanism for timepiece |
| CN201060382Y (en) * | 2007-05-23 | 2008-05-14 | 杭州手表有限公司 | Dual-layer large calendar mechanism of timekeeper |
| CN206400276U (en) * | 2016-12-22 | 2017-08-11 | 天津海鸥表业集团有限公司 | Double-layer calendar mechanism for a timepiece |
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| Publication number | Publication date |
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| CN108227454A (en) | 2018-06-29 |
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