CN106909056A - Sun azimuth and sunrise and sunset display mechanism of watch - Google Patents
Sun azimuth and sunrise and sunset display mechanism of watch Download PDFInfo
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- CN106909056A CN106909056A CN201510992231.XA CN201510992231A CN106909056A CN 106909056 A CN106909056 A CN 106909056A CN 201510992231 A CN201510992231 A CN 201510992231A CN 106909056 A CN106909056 A CN 106909056A
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- wheel
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- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 10
- 238000003199 nucleic acid amplification method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
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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
- G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
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- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
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Abstract
The invention discloses a sun direction and sunrise and sunset display mechanism of a watch, which comprises a driving part, a command control part and a function display part, wherein the driving part is used for driving the display mechanism to display the sunrise and sunset; the driving part is a power input end and drives the command control part, and the sun direction and the sunrise and sunset are displayed through the function display part. The beneficial effects are that: due to the movement of the horizon indicator panel relative to the solar disc, the visual movement of the sun is effectively displayed, and simultaneously, the sunrise and sunset time is automatically adjusted according to the change of the date; the mechanism is simple and reliable, the processing difficulty is relatively low, and the universality is good; the whole mechanism is relatively independent, the occupied space is small, and independent adjustment and integral assembly and disassembly can be realized; the mechanism module can be loaded on a perpetual calendar machine core, is also suitable for a non-perpetual calendar machine core, greatly improves the adaptability of the module, becomes a functional module with very high universality, and particularly, the mechanism parts can be correspondingly replaced according to different latitudes where users are located so as to meet the use requirements of regions in different latitudes in the world, and have good part interchangeability.
Description
Technical field
The present invention relates to a kind of watchwork, the sun real-time azimuthal of more particularly to a kind of wrist-watch and sunrise sunset it is aobvious
Show mechanism.
Background technology
, to the Cognitive Origin of time in the observation to celestial body, day, the moon, the concept in year are respectively from earth rotation, the moon for the mankind
Ball revolves around the sun around the revolution of the earth and the earth.Therefore, chronometry can be described as being developed from astronomy.Due to celestial bodies motion
Rule is complicated, and in mechanical watch, astronomy display provides extra temporal information usually as sophisticated functions.
The sun has lofty status in the minds of people all the time as the central body of the solar system residing for the mankind.Too
Sun is closely bound up with the daily life of the mankind, either cultivates production, or all too busy to get away sun of work and rest activity, and the mankind from ancient times
The sun is risen in east and drop in west, and the cyclically-varying of solar azimuth is rather paid attention to, and a series of fingers have been made on this basis
Lead the calendar of people's daily life system.It is exactly a kind of solar calendar that the general Greggory in the current whole world is gone through, and the correspondence earth encloses within 1 year
Around the period of revolution of sun operation, the orientation and sun set/raise time of the sun back and forth change by the cycle of year.
The mode of stem-winder display sun operation and sun set/raise time has a lot, and most commonly seen is pointer-type.100
Many years ago, pocket-watch can show sun set/raise time by pointer, but to function ability same in recent years on watch
Realize.Although this display mode can indicate sun set/raise time, the operation of the sun cannot be shown.Patent CH690516A5
In propose the display mode of a kind of operation of the sun and sun set/raise time, the operation of the sun is shown by a ring-like window,
The border of window is moved according to the date, correspondence sun set/raise time.But the every three talentes rotation of the sun is turned around in the mechanism, ring
The border of shape window is not due to being level and not corresponding to horizon, therefore the design can not show the actual apparent motion of the sun.
In patent EP1962154B1, a root pointer indicates mean solar hour, turns around within every 24 hours；Another two root pointer indicates to specify
The sun set/raise time in place, changes with the date.When the method shows the sun better and the sun haunts, but the method
Pointer-type is still fallen within, if the pointer during sun will be indicated to change solar pattern into, the sun is but below dial plate and suitable after sunrise
Hour hands rotate, and do not conform to the actual conditions.And the mechanism is extremely complex, realize that difficulty is very big.Up to the present, also no stem-winder can
To show the apparent motion of the sun, and sunrise sunset is shown with horizon, while sun set/raise time changes according to the date.
The content of the invention
Technical problem solved by the invention is to overcome prior art defect, there is provided a kind of with the difference on date, the sun
The indication mechanism that also has periodically variable sun real-time azimuthal long for horizontal orientation and day.
The technical scheme that patent of the present invention is used：The solar azimuth and sunrise sunset indication mechanism of a kind of wrist-watch, including, drive
Dynamic part, order control section and function display portion；The drive part is power intake simultaneously drive command control section,
Solar azimuth and sunrise sunset are shown by function display portion.
The drive part includes that riveted is integrated and can be around the calendar wheel component and shifting block wheel of coaxial line rotation；Institute
The shifting block for stating shifting block wheel stirs idle wheel；The order control section includes, pressing be integrated and the cam wheel piece of synchronous axial system and
Cam, and lever；The lever is fixed on clamping plate, and the contact of lever one end is in close contact with the outer rim of cam all the time；Institute
Stating function indication mechanism part includes, first amplifies wheel, the second amplification wheel, hold-down mechanism, sliding block, horizon indicator board and the sun
Disk；The other end of the lever is that sector is engaged with the first amplification wheel；Described second amplifies wheel is with the first amplification wheel riveted
Integrally, the second amplification wheel is engaged with the tooth bar of sliding block, and the horizon indicator board is connected with sliding block, and the solar disk is arranged on folder
On plate.
The hold-down mechanism includes holddown spring, wire spring or pole spring, and spring pushes down lever all the time.
A U-lag is formed with the horizon indicator board, the wheel shaft of solar disk in U-lag, horizon indicator board
Moved up and down in U-lag with sliding block；The horizon indicator board does upper and lower straight reciprocating motion once according to the date every year.
Described first amplifies wheel, the second amplification wheel and holddown spring coaxial line is fixed as one, and can be along axis synchronization
Rotate.
The horizon indicator board finely tunes both relative positions with sliding block by eccentric nail.
The beneficial effect of patent of the present invention is：Because horizon indicator board is relative to the movement of solar disk, the sun is effectively shown
Apparent motion, meanwhile, sun set/raise time according to the date change and adjust automatically；The mechanism is simple and reliable, and difficulty of processing is relative
Relatively low, versatility is good；Integrated model is relatively independent, occupies little space, and can accomplish independent adjustment, bulk handling；Mechanism's mould
Block can not only load on perpetual calendar movement, and non-perpetual calendar movement is equally applicable, substantially increases the adaptability of this module, into
It is that a kind of versatility functional module very high, the particularly mechanism element different latitude can make phase according to residing for user
Should replace, to meet the use requirement in world different latitude area, interchangeablity is good.
In addition, being integrated by accurate calculating, sunrise time variation track and sunset time variation track are reasonably closed
And, would indicate that horizontal display board there are two pieces to be reduced to one piece so as to reach, can not only meet functional requirement, drop more significantly
The low complexity of structure, reduces production cost.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of patent Example of the present invention 1；
Fig. 2 is the axial arrangement schematic diagram of patent of the present invention；
Fig. 3 is the summer solstice state plane schematic diagram of patent of the present invention；
Fig. 4 is the planar structure schematic diagram of patent Example of the present invention 2；
Fig. 5 is the planar structure schematic diagram of patent Example of the present invention 3；
Fig. 6 is the planar structure schematic diagram of patent Example of the present invention 4；
Fig. 7 is the planar structure schematic diagram of patent Example of the present invention 5；
Fig. 8 is the planar structure schematic diagram of patent Example of the present invention 6.
In figure：
1：Calendar wheel component 2：Shifting block wheel 3：Idle wheel
4：Cam wheel piece 5：Cam 6：Lever
7：First amplifies wheel 8：Second amplifies wheel 9：Holddown spring
10：Sliding block 11：Horizon indicator board 12：Solar disk
13：The sun 14：Sunrise horizon 15：Sunset horizon.
Specific embodiment
Below, the structure and the course of work of patent of the present invention are described in further details with reference to accompanying drawing：
Solar azimuth indication mechanism of the present invention, including, drive part, order control section and function display portion；The driving
Part is power intake and drive command control section, and solar azimuth is shown by function display portion.
As depicted in figs. 1 and 2, drive part includes that riveted is integrated and can be around the calendar wheel component 1 of coaxial line rotation
With shifting block wheel 2, calendar wheel component 1 and shifting block wheel 2 monthly revolve and turn around；The shifting block of the shifting block wheel 2 stirs idle wheel 3；The life
Making control section includes, cam wheel piece 4, cam 5 and lever 6, and cam 5 is fixed as one with cam wheel piece 4, and cam 5 can be with convex
The pivot center of wheel wheel piece 4 is revolution center line and the synchronous axial system of cam wheel piece 4, and the contact of the lever 6 is tight with the outer rim of cam 5
Contiguity is touched, and with the rotation of cam 5, the cam external profile diameter of contact changes, and lever 6 can turn around pivot center
It is dynamic；The function indication mechanism part includes that first amplifies the amplification of wheel 7, second wheel 8, hold-down mechanism, sliding block 10, horizon refers to
Show plate 11 and solar disk 12；Hold-down mechanism includes holddown spring, wire spring or pole spring, and spring pushes down lever 6 all the time；The lever
6 other end is that sector is engaged with the first amplification wheel 7；Described second amplifies wheel 8 is integrated with the first amplification 7 riveteds of wheel, the
Two amplify wheel 8 engages with the tooth bar of sliding block 10, and the horizon indicator board 11 is connected with sliding block 10, and the solar disk 12 is arranged on
On clamping plate；A U-lag is formed with horizon indicator board 11, the wheel shaft of solar disk 12 in U-lag, horizon indicator board 11
Moved up and down in U-lag with sliding block 10；Horizon indicator board 11 finely tunes both relative positions with sliding block 10 by eccentric nail.
It is worthy of note that, there are six shifting blocks on the shifting block wheel 2 of the embodiment 1 of solar azimuth indication mechanism of the present invention, dial
The shifting block of great wheel 2 can stir idle wheel 3, and the mutual moving situation between shifting block wheel 2 and idle wheel 3 is：2 groups, shifting block wheel between one month
Dynamic idle wheel 3 six times, because calendar wheel component 1 must be rotated one week for one month, therefore either in perpetual calendar also right and wrong 10000 years
Structure is gone through, this moving situation must be set up；The idle wheel 3 is engaged with cam wheel piece 4, and cam wheel piece complete cycle is 72 teeth, because dialling
Great wheel 2 stirs idle wheel 3 six times every month, so idle wheel 3 rotates six teeth every month, because cam wheel piece 4 is mutually nibbled with idle wheel 3
Close, so cam wheel piece 4 rotates six teeth every month, rotate 6 × 12 teeth within 1 year, 72 teeth are just rotated one week.In addition,
First amplify wheel 7, second amplify wheel 8, the three's coaxial line of holddown spring 9 is fixed as one, and can with common axis line synchronous axial system,
Holddown spring 9 makes the contact of lever 6 be in close contact the outer rim of cam 5 all the time, while holddown spring 9 effectively eliminates the first amplification
Backlash between wheel 7 and lever 6；After the second amplification wheel 8 is increased linear velocity by gearratio, the tooth with sliding block 10
Bar is engaged, and such sliding block 10 can just be driven by tooth, the change in location of the contact of lever 6 when being rotated with cam 5 and do upper and lower
Linear motion；The horizon indicator board 11 is connected with sliding block 10, it is possible to both relative positions are finely tuned by eccentric nail；Institute
Stating has the sun 13 to rotate one week daily in a counterclockwise direction on solar disk 12, imitate the sun and rise in east and drop in west, when principle is with common 24
Mechanism is identical, repeats no more here.The right side top edge of the horizon indicator board 11 is sunrise horizon 14, left side top edge
It is sunset horizon 15.It is daily sunrise when the edge of the sun 13 has just exposed sunrise horizon 14；When the edge of the sun 13 is complete
It is sunset when falling into sunset horizon 15.Time between from sun to sun is that day is long.
The operation principle of solar azimuth indication mechanism of the present invention is：
State shown in Fig. 1 is the winter solstice, and, farthest away from the revolution center line of cam 5, horizon refers to for the contact point of lever 6 and cam 5
Show that plate 11 is top, thus user can see the sun on solar disk time it is most short, this day length it is most short；Flow over time
Die, calendar wheel component 1 is rotated clockwise together with shifting block wheel 2, shifting block is stirred idle wheel 3 and rotated counterclockwise, cam wheel piece 4 and idle wheel
3 engagements, cam 5 is fixed with the coaxial line of cam wheel piece 4, so cam 5 is rotated clockwise together with cam wheel piece 4, lever 6 with it is convex
The contact point of wheel 5 is increasingly closer to the axis of rotation of cam 5, so lever 6 is rotated clockwise, first amplifies wheel 7 and lever 6
Sector engagement, second amplifies wheel 8 coaxially rotates counterclockwise together with first amplifies wheel 7, and second amplifies wheel 8 with sliding block 10
Tooth bar is engaged, so sliding block 10 moves along a straight line downwards.When cam 5 turns to the position shown in Fig. 3, i.e. the summer solstice, lever 6 with
Closest to the revolution center line of cam 5, most on the lower, therefore user can see too horizon indicator board 11 contact point of cam 5
The time of the sun on positive disk is most long, and this day length is most long；Calendar wheel component 1 is rotated clockwise together with continuing with shifting block wheel 2, is passed through
Transmission, more and more far away from the axis of rotation of cam 5, sliding block 10 starts linear motion upwards for the contact point of lever 6 and cam 5, when
When mechanism turns again to state shown in Fig. 1, i.e. winter solstice, now by 1 year.It is lasting afterwards above-mentioned, do cycle movement.
As shown in figure 4, embodiment 2, if power intake is changed into a month band moving cam wheel piece 4 rotates a tooth,
Or input is changed to rotate within one week a circle, or input is changed to rotate within one day circle etc., according to different input modes
Only need to make simply changing by input and the associated number of teeth of cam wheel piece 4 achieve that, belong to guarantor of the invention
Shield scope.
As shown in figure 5, compressing structure is changed into wire spring or pole spring in embodiment 3, pushes down lever 6 and press as shown in Figure 5
Tight spring 9（2）, can equally play a part of to make the contact of lever 6 to be in close contact the outer rim of cam 5 all the time.
As shown in fig. 6, individually being engaged compressing structure is independent such as Fig. 6 institutes with the tooth bar on sliding block 10 in embodiment 4
Show holddown spring 9（3）, can equally play a part of to make the contact of lever 6 be in close contact the outer rim of cam 5 all the time, while having
Effect eliminates sliding block 10 and second and amplifies the backlash that wheel 8 and first amplifies between wheel 7 and lever 6.
As shown in fig. 7, compressing structure is changed into wire spring or pole spring in embodiment 5, pushes down sliding block 10 and press as shown in Figure 7
Tight spring 9（4）, can equally play a part of to make the contact of lever 6 to be in close contact the outer rim of cam 5 all the time, while effectively disappearing
Amplify the backlash taken turns between 7 and lever 6 except sliding block 10 and second amplifies wheel 8 and first.
As shown in figure 8, idle wheel 3 is eliminated in embodiment 6, it is worthy of note that, either cancel idle wheel or increase
More stages idle wheel be attained by with this patent identical effect, belong to protection scope of the present invention.
Solar azimuth indication mechanism of the present invention is simple and reliable, and difficulty of processing is relatively low, and versatility is good.Mechanism entirety phase
To independence, occupy little space, independent adjustment, bulk handling can be accomplished.Mechanism element can according to residing for user not suspension
Degree makes corresponding replacement, and to meet the use requirement in world different latitude area, interchangeablity is good.
In addition, being integrated by accurate calculating, sunrise time variation track and sunset time variation track are reasonably closed
And, would indicate that horizontal display board there are two pieces to be reduced to one piece so as to reach, can not only meet functional requirement, drop more significantly
The low complexity of structure, reduces production cost.
When mechanism is positioned using hairspring rather than pole spring, consumption torque is small, improves mechanism reliability.
This mechanism module can not only load on perpetual calendar movement, and non-perpetual calendar movement is equally applicable, substantially increases this
The adaptability of module, as a kind of versatility functional module very high.
It is worthy of note that, protection scope of the present invention is not limited to above-mentioned instantiation mode, of the invention
Basic fundamental is conceived, it is also possible to by changing connected mode, change the number of teeth of gear, increases the quantity of idle wheel, and change uses other
Indicant indicates energy state to realize the purpose of the present invention, as long as those of ordinary skill in the art need not move through creative labor
It is dynamic, you can the implementation method associated, belong to protection scope of the present invention.
Claims (6)
1. a kind of solar azimuth of wrist-watch and sunrise sunset indication mechanism, it is characterised in that including drive part, order control
Part and function display portion；The drive part is power intake and drive command control section, by function display part
Divide display solar azimuth and sunrise sunset.
2. the solar azimuth of wrist-watch according to claim 1 and sunrise sunset indication mechanism, it is characterised in that the driving
Part includes that riveted is integrated and can be around the calendar wheel component of coaxial line rotation（1）With shifting block wheel（2）；The shifting block wheel（2）
Shifting block stir idle wheel（3）；The order control section includes, pressing be integrated and synchronous axial system cam wheel piece（4）With it is convex
Wheel（5）, and lever（6）；The lever（6）It is fixed on clamping plate, lever（6）The contact of one end all the time with cam（5）It is outer
Edge is in close contact；The function indication mechanism part includes that first amplifies wheel（7）, second amplify wheel（8）, hold-down mechanism, sliding block
（10）, horizon indicator board（11）And solar disk（12）；The lever（6）The other end for sector with first amplify take turns（7）
Engagement；Described second amplifies wheel（8）Amplify wheel with first（7）Riveted is integrated, and second amplifies wheel（8）With sliding block（10）Tooth bar
Engagement, the horizon indicator board（11）With sliding block（10）Connection, the solar disk（12）On clamping plate.
3. the solar azimuth of wrist-watch according to claim 2 and sunrise sunset indication mechanism, it is characterised in that the compression
Mechanism includes holddown spring, wire spring or pole spring, and spring pushes down lever all the time（6）.
4. the solar azimuth of wrist-watch according to claim 2 and sunrise sunset indication mechanism, it is characterised in that the Horizon
Line indicator board（11）On be formed with a U-lag, solar disk（12）Wheel shaft in U-lag, horizon indicator board（11）With cunning
Block（10）Moved up and down in U-lag；The horizon indicator board（11）Upper and lower straight reciprocating motion one is done according to the date every year
It is secondary.
5. the solar azimuth of wrist-watch according to claim 3 and sunrise sunset indication mechanism, it is characterised in that described first
Amplify wheel（7）, second amplify wheel（8）And holddown spring（9）Coaxial line is fixed as one, and can be along axis synchronous axial system.
6. the solar azimuth of wrist-watch according to claim 2 and sunrise sunset indication mechanism, it is characterised in that the Horizon
Line indicator board（11）With sliding block（10）Both relative positions are finely tuned by eccentric nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510992231.XA CN106909056B (en) | 2015-12-23 | 2015-12-23 | Sun azimuth and sunrise and sunset display mechanism of watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510992231.XA CN106909056B (en) | 2015-12-23 | 2015-12-23 | Sun azimuth and sunrise and sunset display mechanism of watch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106909056A true CN106909056A (en) | 2017-06-30 |
| CN106909056B CN106909056B (en) | 2018-10-02 |
Family
ID=59206324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510992231.XA Active CN106909056B (en) | 2015-12-23 | 2015-12-23 | Sun azimuth and sunrise and sunset display mechanism of watch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106909056B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090230A (en) * | 2018-10-23 | 2020-05-01 | Eta瑞士钟表制造股份有限公司 | Timepiece capable of indicating the position of the sun relative to the horizon anywhere in the world |
| CN111812958A (en) * | 2019-04-10 | 2020-10-23 | Eta瑞士钟表制造股份有限公司 | Device for displaying a series of periodic events forming an annual cycle and timepiece comprising such a display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367885A (en) * | 1999-06-16 | 2002-09-04 | 时空***有限公司 | Timepiece from which sunrise and sunset time can be determined |
| CN101281387A (en) * | 2007-09-07 | 2008-10-08 | 马庆华 | Clock |
| CN104181802A (en) * | 2014-08-21 | 2014-12-03 | 刘葆锴 | Global solar clock |
| CN104765265A (en) * | 2015-04-21 | 2015-07-08 | 河北师范大学 | Day and night separated display clock dial plate and watch hand assembly |
| EP2911013A1 (en) * | 2014-02-20 | 2015-08-26 | The Swatch Group Research and Development Ltd. | Timepiece capable of indicating the sunrise or sunset at any point on the globe |
| CN205375002U (en) * | 2015-12-23 | 2016-07-06 | 天津海鸥表业集团有限公司 | Sun direction and sunrise and sunset display mechanism of watch |
-
2015
- 2015-12-23 CN CN201510992231.XA patent/CN106909056B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367885A (en) * | 1999-06-16 | 2002-09-04 | 时空***有限公司 | Timepiece from which sunrise and sunset time can be determined |
| CN101281387A (en) * | 2007-09-07 | 2008-10-08 | 马庆华 | Clock |
| EP2911013A1 (en) * | 2014-02-20 | 2015-08-26 | The Swatch Group Research and Development Ltd. | Timepiece capable of indicating the sunrise or sunset at any point on the globe |
| CN104181802A (en) * | 2014-08-21 | 2014-12-03 | 刘葆锴 | Global solar clock |
| CN104765265A (en) * | 2015-04-21 | 2015-07-08 | 河北师范大学 | Day and night separated display clock dial plate and watch hand assembly |
| CN205375002U (en) * | 2015-12-23 | 2016-07-06 | 天津海鸥表业集团有限公司 | Sun direction and sunrise and sunset display mechanism of watch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090230A (en) * | 2018-10-23 | 2020-05-01 | Eta瑞士钟表制造股份有限公司 | Timepiece capable of indicating the position of the sun relative to the horizon anywhere in the world |
| US11550266B2 (en) | 2018-10-23 | 2023-01-10 | Eta Sa Manufacture Horlogere Suisse | Timepiece capable of indicating the position of the sun with respect to the horizon anywhere in the world |
| CN111812958A (en) * | 2019-04-10 | 2020-10-23 | Eta瑞士钟表制造股份有限公司 | Device for displaying a series of periodic events forming an annual cycle and timepiece comprising such a display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106909056B (en) | 2018-10-02 |
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