CN103425036A - State switching mechanism of mechanical watch - Google Patents
State switching mechanism of mechanical watch Download PDFInfo
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- CN103425036A CN103425036A CN2012101671428A CN201210167142A CN103425036A CN 103425036 A CN103425036 A CN 103425036A CN 2012101671428 A CN2012101671428 A CN 2012101671428A CN 201210167142 A CN201210167142 A CN 201210167142A CN 103425036 A CN103425036 A CN 103425036A
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- push rod
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Abstract
The invention discloses a state switching mechanism of a mechanical watch. A work rod is installed in a movement and can rotate around a central hole to realize corresponding functions. An automatic shifting block rotates with a minute wheel and is contacted with or disengaged from a starting push rod. A starting rod stop pin is installed at the plane of a state switching rod and is contacted with or disengaged from the starting rod. The starting rod and the work rod are contacted; and the starting rod carries out stroke controlling on the work rod to complete different functions. The starting rod and the starting push rod that are pressed at the state switching rod can rotate freely around an axis of a starting rod pin. A hand-operated push rod can rotate by taking an axis of a position pin as a center of a circle in a limit space of a through hole and a bolt. And a state switch wheel and a state switching cam are pressed into one and can rotate around the center. The provided state switching mechanism has the following beneficial effects: switching of an automatic operation-manual operation state, a manual operation state, and a static state can be realized by the set of mechanism; and the provided mechanism can be applied to structures, needing switching of three or more than three states, of a strike watch and a music box watch and the like.
Description
Technical field
The present invention relates to a kind of status switching mechanism of stem-winder, particularly need to carry out the status switching mechanism of " automatically with manual ", " manually " and " static " three kinds of states conversions.
Technical background
Sometimes need to carry out " automatically with manual ", " manually " and " static " three kinds of states conversions in stem-winder, for example from ring, show music box table etc.Status switching mechanism in the past often can only be realized the conversion of two states, and its structure is also to take reciprocal to stir structure as main.Certainly all be easy to find such state transformational structure in ring table and music box wrist-watch.
With existing structure to realize three kinds of functions conversion that just need at least two nested structures to be used in conjunction with, so just increased the complexity of structure.Back and forth stir driving lever for employing in addition and realize that the structure of state conversion is unfavorable for the water resistance of wrist-watch outward appearance.
Summary of the invention
Problem to be solved by this invention is that a kind of status switching mechanism that can realize that three kinds of states are changed mutually is provided.
The technical solution adopted in the present invention is: a kind of status switching mechanism of stem-winder comprises: working beam, work pole spring, actuating lever, startup push rod, automatically shifting block, state selector bar, start push rod spring, actuating lever retaining screw, state selector bar nail, state conversion pole spring, hand push rod, hand push rod nail, hand push rod return spring, state conversioning wheel, state switching cam, draw gear, draw retaining screw, arbor; Described working beam is arranged in movement, and can be rotated around its center pit; Described working beam contacts with the work pole spring with actuating lever; Minute wheel in described automatic shifting block and movement is combined into one, and with minute wheel, rotates, and described automatic shifting block contacts or breaks away from the startup push rod; Described state selector bar is arranged in movement by screw, and the state selector bar can freely rotate around the axle center of screw; On described state selector bar, Plane Installation has the actuating lever retaining screw, and the actuating lever retaining screw contacts with actuating lever or breaks away from; State selector bar lower plane is equipped with state selector bar nail, and the first workplace that state selector bar nail is changed pole spring with state contacts, and state is changed pole spring and is fixedly mounted in movement and provides restoring force into the state selector bar; Following closely pressing by actuating lever on the state selector bar has actuating lever and starts push rod, and actuating lever and startup push rod can freely rotate around the axle center of actuating lever nail; Be equipped with and start the push rod spring by screw on described state selector bar; Being formed with through hole pressing on described hand push rod has hand push rod nail, and hand push rod is installed in place nailing on, and screw is screwed in movement through through hole, and it is the center of circle that hand push rod can be take the axle center of position nail, in the restricted quarter of through hole and screw, rotates; Described state conversioning wheel and state switching cam are pressed into one, can be around its center rotating, and the different operating face of described state switching cam contacts or breaks away from the state selector bar respectively; Described gear and the arbor of drawing is arranged in movement, described draw to block to be equipped with draw retaining screw, draw an end of gear to be arranged in the groove of arbor, draw retaining screw to come in contact with the state control lever or to break away from.
The first workplace of described working beam contacts with the work pole spring with actuating lever respectively with the second workplace; Described automatic shifting block contacts with the first workplace that starts push rod; The second workplace that starts push rod contacts with the first workplace of actuating lever, and the startup push rod can promote actuating lever and rotate counterclockwise, and the 3rd workplace of actuating lever contacts with the first workplace of working beam, the actuating lever bar that pushes the work forward; The first workplace of hand push rod contacts or breaks away from actuating lever the second workplace, and hand push rod can promote actuating lever and rotate counterclockwise.
The workplace of described state switching cam comprises the first workplace, the second workplace and the 3rd workplace, the first workplace is automatically with manual, the second workplace is manual, the 3rd workplace is static, and the first workplace of described state selector bar contacts with the first workplace, the second workplace or the 3rd workplace respectively.
The workplace of described work pole spring contacts with the second workplace of working beam, for working beam provides restoring force; The working end that starts the push rod spring contacts with starting push rod, for starting push rod, provides restoring force; Described actuating lever retaining screw contacts with actuating lever, the motion of restriction actuating lever; Described hand push rod return spring is screwed in movement, and one end and hand push rod nail joint are touched, and the hand push rod return spring is followed closely and provided restoring force for hand push rod by hand push rod.
The invention has the beneficial effects as follows: can realize the conversion of " automatically with manual ", " manually " and " static " three kinds of states by a set of mechanism, in addition, the realization of state conversion also realizes by button, more is conducive to the design of movement waterproof construction simultaneously; This structure can be used in the middle of ring table, this class of music box table need to be carried out the structure of state conversion more than three kinds or three kinds certainly.
The accompanying drawing explanation
Fig. 1 is the part planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Fig. 2 is the planimetric map of automatic operation under " automatically and manually " state of status switching mechanism of a kind of stem-winder of the present invention;
Fig. 3 is the planimetric map of manual work under " automatically and manually " state of status switching mechanism of a kind of stem-winder of the present invention;
Fig. 4 is automatic operation safety structure planimetric map under " automatically and manually " state of status switching mechanism of a kind of stem-winder of the present invention;
Fig. 5 is manual work planimetric map under " manually " state of status switching mechanism of a kind of stem-winder of the present invention;
Fig. 6 does not trigger the planimetric map of work structuring under " static " state of status switching mechanism of a kind of stem-winder of the present invention;
Fig. 7 is that the status switching mechanism of a kind of stem-winder of the present invention does not trigger the planimetric map of work structuring under movement pulling needle state;
Fig. 8 be the status switching mechanism of a kind of stem-winder of the present invention after the movement pulling needle finishes sleeve mechanism in the position plane figure of normal return not;
Fig. 9 is status switching mechanism safety structure duty planimetric map under the state of the abnormal return of a whole set of structure of a kind of stem-winder of the present invention;
Figure 10 is the part stereographic map of state selector bar parts of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 11 is the state switching cam planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 12 is the working beam planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 13 is the automatic poking head plane figure of the status switching mechanism of a kind of stem-winder of the present invention
Figure 14 is the actuating lever planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 15 is the startup push rod planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 16 is the state selector bar planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 17 is the hand push rod planimetric map of the status switching mechanism of a kind of stem-winder of the present invention;
Figure 18 is the planimetric map that the state of the status switching mechanism of a kind of stem-winder of the present invention is changed pole spring.
In figure:
1. working beam 2 work pole spring 3 actuating levers 4 start push rod
The automatic shifting block 7 state selector bars 8 of 5 actuating lever nail 6 start the push rod spring
9 screw 10 actuating lever retaining screw 11 state selector bars are followed closely 12 screws
15 nail 16 screws of 13 state conversion pole spring 14 hand push rods
17 hand push rods are followed closely 18 hand push rod return spring 19 state conversioning wheel 20 state switching cams
21 draw gear 22 to draw retaining screw 23 arbors.
Embodiment:
Being further described the status switching mechanism of a kind of stem-winder of the present invention below in conjunction with accompanying drawing:
As shown in Fig. 1, Figure 10 ~ Figure 18, the status switching mechanism of stem-winder of the present invention comprises: working beam 1, work pole spring 2, actuating lever 3, start push rod 4, automatically shifting block 6, state selector bar 7, start push rod spring 8, actuating lever retaining screw 10, state selector bar nail 11, state conversion pole spring 13, hand push rod 14, hand push rod nail 17, hand push rod return spring 18, state conversioning wheel 19, state switching cam 20, draw gear 21, draw retaining screw 22, arbor 23; Described working beam 1 is arranged in movement, and working beam 1 can rotate by Rao Qi center 1c; The first workplace 1a of described working beam 1 contacts with work pole spring 2 with actuating lever 3 respectively with the second workplace 1b, and work pole spring 2 provides restoring force for working beam 1; Described automatic shifting block 6 is combined into one with the minute wheel in movement, with minute wheel, rotates, and described automatic shifting block 6 can contact with the first workplace 4a that starts push rod 4; Described state selector bar 7 is arranged in movement by screw 12, and state selector bar 7 can freely rotate around the axle center of screw 12; On described state selector bar 7, Plane Installation has actuating lever retaining screw 10, and actuating lever retaining screw 10 contacts with actuating lever 3, and restriction starts 3 motion; State selector bar 7 lower planes are equipped with state selector bar nail 11, and state selector bar nail 11 contacts with the workplace 13a of state conversion pole spring 13, and state conversion pole spring 13 is fixedly mounted in movement, for state selector bar 7 provides restoring force; Following closely 5 pressings by actuating lever on state selector bar 7 has actuating lever 3 and starts push rod 4, actuating lever 3 and start push rod 4 and can follow closely 5 axle center around actuating lever and freely rotate, the the second workplace 4b that starts pushing bar 4 contacts with the first workplace 3a of actuating lever 3, startup push rod 4 can promote actuating lever 3 and rotate counterclockwise, the 3rd workplace 3c of actuating lever 3 contacts with the first workplace 1a of working beam 1, and push the work forward bar 1 of actuating lever 3 rotates; Be equipped with and start push rod spring 8 by screw on described state selector bar 7, the working end that starts push rod spring 8 contacts with starting push rod 4, can, after startup push rod 4 is mobile clockwise, for starting push rod 4, provide restoring force; Be formed with through hole 14b and hand push rod nail 17 on described hand push rod 14, hand push rod nail 17 be fixed in an end in contact of the hand push rod return spring 18 in movement by screw, hand push rod return spring 18 is followed closely 17 by hand push rod and is provided restoring force for hand push rod 14; Hand push rod 14 is installed on nail 15 in place, and screw 16 is screwed in movement through through hole 14b, and hand push rod 14 can be take position, and to follow closely 15 axle center be the center of circle, in the restricted quarter of through hole 14b and screw 16, rotates; The first workplace 14a of described hand push rod 14 can contact with the second workplace 3b of actuating lever 3, can promote actuating lever 3 when promoting clockwise hand push rod 14 and rotate counterclockwise.Described state conversioning wheel 19 and state switching cam 20 are pressed into one, can be around its center rotating, the workplace of described state switching cam 20 comprises the first workplace 20a, the second workplace 20b and the 3rd workplace 20c, the first workplace 20a is automatically with manual, the second workplace 20b is manual, the 3rd workplace 20c is static, and the first workplace 7a of described state selector bar 7 contacts with the first workplace 20a, the second workplace 20b or the 3rd workplace 20c respectively; Described gear 21 and the arbor 23 of drawing is arranged in movement, draw gear 21 can rotate with the 21aWei center of circle, axle center, described drawing on gear 21 is equipped with and draws retaining screw 22, draw an end that keeps off 21 to be arranged in the groove of arbor 23, when pulling out arbor 23, draw gear 21 to rotate around axle center 21a, draw retaining screw 22 to come in contact with state control lever 7.
The course of work below in conjunction with above-mentioned principle and accompanying drawing to the status switching mechanism of stem-winder of the present invention is further described.
As shown in Fig. 2, Figure 10 ~ Figure 16, it is upper that the first working end 7a of state selector bar 7 is positioned at the first workplace 20a of state switching cam 20, and corresponding duty is " automatically and manually ".Automatically shifting block 6 is along with the minute wheel in movement rotates together, when the first workplace 6a that forwards automatic shifting block 6 to and the first workplace 4a that starts push rod 4 come in contact, automatically shifting block 6 can rotate counterclockwise by promotion startup push rod 4, startup push rod 4 promotes actuating lever 3 again and rotates counterclockwise, actuating lever 3 bar 1 that pushes the work forward forwards from original dotted line position the working position that solid line means to, so just can realize the automatic operation of system.
As shown in Fig. 3,14,17, automatically shifting block 6 is in the left side that starts push rod 4, do not come in contact, now promote the working end 14c of hand push rod 14, hand push rod 14 can rotate around hand push rod axle center nail 15, and the working end 14a of hand push rod 14 can promote the working end 3b of actuating lever 3, and actuating lever 3 is rotated counterclockwise, actuating lever 3 bar 1 that pushes the work forward forwards from original dotted line position the working position that solid line means to, has so just realized the manual work of system.The restriction of hand push rod 14 limited location hole 14b and screw 16 can only realize certain interval rotation, and now the hole 14b of hand push rod 14 does not contact with screw 16, does not therefore reach maximum promotion stroke.
As shown in Fig. 4,13,14,17, automatically shifting block 6 is on the right side that starts push rod 4, at this moment promote the working end 14c of hand push rod 14, hand push rod 14 can rotate around hand push rod axle center nail 15, the working end 14a of hand push rod 14 can promote the working end 3b of actuating lever 3, actuating lever 3 is rotated counterclockwise, and actuating lever 3 bar 1 that pushes the work forward forwards from original dotted line position the working position that solid line means to, has so just realized the manual work of system.Under this state, start push rod 4 not mobile, so just automatic shifting block 6 is not impacted, thereby guarantee that movement can normally move.
As shown in Fig. 5, Figure 11 ~ Figure 17, the working end 7a of state selector bar 7 is positioned on the second workplace 20b of state switching cam 20, and corresponding duty is " manually ".Now, state selector bar 7 has been lifted an angle, so just allows and starts the radius of clean-up that push rod 4 has broken away from automatic shifting block 6, and shifting block 6 just can't be had an effect with starting push rod 4 automatically, and movement just can not have been worked in " automatically " like this.Now promote the working end 14c of manual push rod 14, the working end 14c of hand push rod 14 promotes the working end 3b of actuating lever 3, due to 7 liftings of state selector bar an angle, actuating lever 3 is owing to being that rotate in axle center around actuating lever nail 5, contact point with working end 1a working beam 1 the working end 3b of actuating lever 3 like this is just close to actuating lever nail 5, namely the radius of clean-up of actuating lever 3 has been dwindled, so needing manual push rod 14 to give larger promotion stroke could allow actuating lever 3 bar 1 that pushes the work forward arrive working position, the hole 14b of the manual push rod 14 shown in Fig. 5 has now sticked with screw 16, arrived maximum impulse stroke, working beam 1 has also arrived working position.
As shown in Fig. 6, Figure 11 ~ Figure 18, the working end 7a of state selector bar 7 is positioned on the 3rd workplace 20c of state switching cam 20, and corresponding duty is " static ".Now, state selector bar 7 is by further lifting angle, and the contact point with working end 1a working beam 1 the working end 3b of actuating lever 3 is again close to actuating lever nail 5.Automatically shifting block 6 is to come in contact with startup push rod 4.Promote the working end 14c of hand push rod 14, at the hole of hand push rod 14 14b and screw 16, come in contact, allow hand push rod 14 reach under the state of range, still can not promote actuating lever 3 and reach and allow working beam 1 arrive the represented working position of dotted line, the structure of movement can not trigger.Movement just is operated under " static " state like this.
As shown in Fig. 7, Figure 16, when arbor 23 pulls to the right, movement enter pulling needle to the time state, draw gear 21 just to take 21a as center of circle rotation, draw retaining screw 22 to contact with the working end 7b of state selector bar 7,7 liftings of state selector bar are played to larger angle, and than before, the angle of " static " state lifting is larger.Now, whole mechanism, in off working state, can not produce interference effect to the adjustment of movement time.
As shown in Fig. 8, Figure 18, in the time of arbor 23 pushed home, draw retaining screw 22 to be separated from state selector bar 7, the working end 13a of state conversion pole spring 13 acts on state selector bar nail 11, promotion state selector bar 7 resets, and now starts push rod 4 and just in time with automatic shifting block 6, collision has occurred.
As shown in Figure 9, the surface of contact that starts push rod 4 and automatic shifting block 6 is the arc surface of inclination, start push rod 4 under the acting force resetted at state conversion pole spring 13 promotion state selector bars 7 and can overcome with automatic shifting block 6 the acting force generation relative sliding that starts push rod spring 8, thereby Guarantee Status selector bar 7 can reset normally, to guarantee whole mechanism reliability service.
Be worth proposing, the conversion of state conversioning wheel cam 20, can complete by the profile of tooth that promotes state conversioning wheel 19.In addition, what the status switching mechanism of a kind of stem-winder of the present invention meaned is three kinds of duties, and the technician can be increased duty quantity according to this principle.
Claims (4)
1. the status switching mechanism of a stem-winder, it is characterized in that, comprising: working beam (1), work pole spring (2), actuating lever (3), start push rod (4), automatically shifting block (6), state selector bar (7), start push rod spring (8), actuating lever retaining screw (10), state selector bar nail (11), state conversion pole spring (13), hand push rod (14), hand push rod nail (17), hand push rod return spring (18), state conversioning wheel (19), state switching cam (20), draw gear (21), draw retaining screw (22), arbor (23); Described working beam (1) is arranged in movement, can rotate around its center pit; Described working beam (1) contacts with work pole spring (2) with actuating lever (3); Described automatic shifting block (6) is combined into one with the minute wheel in movement, with minute wheel, rotates, and described automatic shifting block (6) contacts or breaks away from startup push rod (4); Described state selector bar (7) is arranged in movement by screw (12), and state selector bar (7) can freely rotate around the axle center of screw (12); The upper Plane Installation of described state selector bar (7) has actuating lever retaining screw (10), and actuating lever retaining screw (10) contacts or breaks away from actuating lever (3); State selector bar (7) lower plane is equipped with state selector bar nail (11), state selector bar nail (11) contacts with the first workplace (13a) that state is changed pole spring (13), and state is changed pole spring (13) and is fixedly mounted in movement and provides restoring force into state selector bar (7); State selector bar (7) is above followed closely (5) pressing by actuating lever to be had actuating lever (3) and starts push rod (4), and actuating lever (3) and startup push rod (4) can be followed closely around actuating lever the axle center of (5) and freely rotate; Described state selector bar (7) is upper to be equipped with and to start push rod spring (8) by screw; Be formed with through hole (14b) pressing on described hand push rod (14) hand push rod nail (17) is arranged, hand push rod (14) is installed on nail in place (15), screw (16) is screwed in movement through through hole (14b), it is the center of circle that hand push rod (14) can be take the axle center that position follows closely (15), rotation in the restricted quarter of through hole (14b) and screw (16); Described state conversioning wheel (19) and state switching cam (20) are pressed into one, can be around its center rotating, and the different operating face of described state switching cam (20) contacts or breaks away from state selector bar (7) respectively; Described gear (21) and the arbor (23) of drawing is arranged in movement, and described drawing on gear (21) is equipped with and draws retaining screw (22), draws an end of gear (21) to be arranged in the groove of arbor (23), draws retaining screw (22) to come in contact with state control lever (7).
2. the status switching mechanism of stem-winder according to claim 1, is characterized in that, first workplace (1a) of described working beam (1) contacts with work pole spring (2) with actuating lever (3) respectively with the second workplace (1b); Described automatic shifting block (6) contacts with the first workplace (4a) that starts push rod (4); The second workplace (4b) that starts push rod (4) contacts with first workplace (3a) of actuating lever (3), startup push rod (4) can promote actuating lever (3) and rotate counterclockwise, the 3rd workplace (3c) of actuating lever (3) contacts with first workplace (1a) of working beam (1), actuating lever (3) bar (1) that pushes the work forward; First workplace (14a) of hand push rod (14) contacts or leaves with second workplace (3b) of actuating lever (3); Hand push rod (14) can promote actuating lever (3) and rotate counterclockwise.
3. the status switching mechanism of stem-winder according to claim 1, it is characterized in that, the workplace of described state switching cam (20) comprises the first workplace (20a), the second workplace (20b) and the 3rd workplace (20c), the first workplace (20a) is automatically with manual, the second workplace (20b) is manual, the 3rd workplace (20c) is static, and first workplace (7a) of described state selector bar (7) contacts with the first workplace (20a), the second workplace (20b) or the 3rd workplace (20c) respectively.
4. the status switching mechanism of stem-winder according to claim 1, is characterized in that, the workplace of described work pole spring (2) contacts with second workplace (1b) of working beam (1), for working beam (1) provides restoring force; The working end that starts push rod spring (8) contacts with starting push rod (4), for starting push rod (4), provides restoring force; Described actuating lever retaining screw (10) contacts with actuating lever (3), the motion of restriction actuating lever (3); Described hand push rod return spring (18) is screwed in movement, and the one end contacts with hand push rod nail (17), and hand push rod return spring (18) is followed closely (17) by hand push rod and provided restoring force for hand push rod (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167142.8A CN103425036B (en) | 2012-05-25 | 2012-05-25 | A kind of status switching mechanism of stem-winder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167142.8A CN103425036B (en) | 2012-05-25 | 2012-05-25 | A kind of status switching mechanism of stem-winder |
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| Publication Number | Publication Date |
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| CN103425036A true CN103425036A (en) | 2013-12-04 |
| CN103425036B CN103425036B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210167142.8A Active CN103425036B (en) | 2012-05-25 | 2012-05-25 | A kind of status switching mechanism of stem-winder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110881A (en) * | 1993-06-17 | 1995-10-25 | 东方时计株式会社 | Timepiece and its display switching mechanism |
| CN2364484Y (en) * | 1998-12-21 | 2000-02-16 | 刘阳彬 | Clockwork mechanism for mechanical pendulum clock without time signal in night |
| JP2002243867A (en) * | 2000-12-14 | 2002-08-28 | Seiko Epson Corp | Watch |
| EP1536298A1 (en) * | 2003-11-25 | 2005-06-01 | Montres Breguet S.A. | Calendar mechanism having entrainment and correction means for two indicators |
| CN1904770A (en) * | 2005-07-26 | 2007-01-31 | 蒙特雷布勒盖股份有限公司 | Control stem device for a watch |
| CN202677069U (en) * | 2012-05-25 | 2013-01-16 | 天津海鸥表业集团有限公司 | Mechanical watch state conversion mechanism |
-
2012
- 2012-05-25 CN CN201210167142.8A patent/CN103425036B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110881A (en) * | 1993-06-17 | 1995-10-25 | 东方时计株式会社 | Timepiece and its display switching mechanism |
| CN2364484Y (en) * | 1998-12-21 | 2000-02-16 | 刘阳彬 | Clockwork mechanism for mechanical pendulum clock without time signal in night |
| JP2002243867A (en) * | 2000-12-14 | 2002-08-28 | Seiko Epson Corp | Watch |
| EP1536298A1 (en) * | 2003-11-25 | 2005-06-01 | Montres Breguet S.A. | Calendar mechanism having entrainment and correction means for two indicators |
| CN1904770A (en) * | 2005-07-26 | 2007-01-31 | 蒙特雷布勒盖股份有限公司 | Control stem device for a watch |
| CN202677069U (en) * | 2012-05-25 | 2013-01-16 | 天津海鸥表业集团有限公司 | Mechanical watch state conversion mechanism |
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| Publication number | Publication date |
|---|---|
| CN103425036B (en) | 2016-08-10 |
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