CN104570685A - Escapement mechanism for watch movement - Google Patents
Escapement mechanism for watch movement Download PDFInfo
- Publication number
- CN104570685A CN104570685A CN201410543900.0A CN201410543900A CN104570685A CN 104570685 A CN104570685 A CN 104570685A CN 201410543900 A CN201410543900 A CN 201410543900A CN 104570685 A CN104570685 A CN 104570685A
- Authority
- CN
- China
- Prior art keywords
- escapement
- fork
- composition surface
- cam portion
- striker pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G04B15/00—Escapements
- G04B15/06—Free escapements
- G04B15/08—Lever escapements
-
- 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
- G04B15/00—Escapements
- G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Micromachines (AREA)
- Table Equipment (AREA)
Abstract
The invention relates to an escapement mechanism for a watch movement. The escapement mechanism (3) for the watch movement includes a pallet lever (7) with a fork (13), and a roller device (4) with an impulse-pin coupled to a balance (2). The fork includes a first horn (19) and a second horn (21). The impulse-pin includes a first cam portion (12) configured to engage an engagement surface (23) of the first horn, and a second cam portion (14) configured to engage an engagement surface (25) of the second horn. Part of engagement in contact with the cam surface portions comprises a non-planar geometric profile.
Description
Technical field
The present invention is about the escapement for watch module, particularly Swiss lever or English lever escapement.The present invention is more specifically about the optimization of the assembly formed by striker pin and escapement lever.
Background technology
The assembly formed by striker pin and escapement lever allows that the tooth of the wheel of escapement unlocks and the impact of balance wheel from lever.Between impact epoch, the striker pin and the escapement lever that are connected to counterbalance utilize each vibration that the energy from escapement lever is sent to counterbalance.
Conventional system is formed by circular or " first quarter moon " shape pin, and this circle or " first quarter moon " shape needle set have a part for the circle of removing, enter in fork in sufficiently stable mode to allow pin.Fork adopts the form of rectangular slits, and the surface contacted with striker pin is plane.
According to the oscillation frequency of counterbalance, the rotational steps of escapement lever and the position of its rotation, or other size, some unavoidably existence in conventional system between striker pin and fork are slided.Pitch identical with the surface in contact between striker pin, for unlocking and for impacting, that is to say, the paired surface that the one-tenth effects on surface contacted when unlocking and occurring in the first vibration contacts with when impacting and occurring in the second vibration is identical.But the geometric configuration that can be the best for unlocking function can not be best for impact function.In the conventional system, therefore the geometric configuration of striker pin and fork is not optimized.
The object optimizing the geometric configuration of the surface in contact between striker pin and fork is particularly to reduce to rub, to reduce the loss of part, or reduces energy loss to improve the efficiency of escapement.
To the object of the present invention is to provide in long use time accurately and reliably timepiece escapement.
Advantageously provide and there is very low-loss timepiece escapement.
Advantageously provide and there is very low power consumption and therefore efficient timepiece escapement.
Compact and sane escapement is advantageously provided.
Summary of the invention
Object of the present invention is realized by timepiece escapement according to claim 1.Subclaims describe favourable aspect of the present invention.
In the present invention, a kind of timepiece escapement for watch module comprises the escapement lever with fork and the device for disc with striker pin being connected in balance wheel, and fork comprises the first fork angle and the second fork angle.Striker pin comprises and is configured to the first cam portion that the composition surface at angle pitched by joint first, and is configured to the second cam portion that the composition surface at angle pitched by joint second.According to aspects of the present invention, enter into the composition surface (that is, active-surface) engaged with cam portion and comprise on-plane surface geometric profile, it is configured to reduce during unblock and percussive action slide.
This makes likely to optimize further the profile of the active-surface in striker pin and on fork, to eliminate or to minimize the friction between these elements.Attempt to obtain rolling movement, and do not enter into the slip between the pin of contact and the part of fork.
According to preferred embodiment, along a sense of rotation of counterbalance, the first fork angle is operating as and enters fork angle, and the second fork angle is as exiting fork angle, and in opposite direction, the first fork angle is operating as exits fork angle, and the second fork angle is as entering fork angle.But the circulation that returns that the present invention also extends to counterbalance only has the escapement once unlocking and impact at every turn, and in this case, of pitching in angle is only operating as and enters fork angle, and another is only as exiting fork angle.
According to an embodiment, composition surface can comprise Part I and Part II, and Part I and Part II are interconnected by surface portion, and this surface portion does not enter into and contacts with the cam portion of striker pin.In other words, surface in contact is (the comprising interruption) of being interrupted.Cam face and composition surface are configured so that the Part I of the composition surface entering fork angle performs the unlocking function of the pallet stone of escapement lever at least in part, and the Part II exiting the composition surface at fork angle performs the impact function of the described pallet stone of escapement lever at least in part.In modification, the Part II entering the composition surface at fork angle also performs the unlocking function of the described pallet stone of escapement lever at least in part.In modification, the Part I exiting the composition surface at fork angle also performs the impact function of the described pallet stone of escapement lever at least in part.There is this embodiment offers in the more possibilities unlocking and optimize during blasting operation the geometric profile of active-surface of discontinuous connection surface.
In modification, composition surface comprises two parts, various piece has the geometric profile limited by the continuous function in its single order or second derivative, be configured so that the Part I of each composition surface mainly performs the unlocking function of the pallet stone of escapement lever, and the Part II of each composition surface mainly performs the impact function of the pallet stone of escapement lever.
In one embodiment, each in the cam portion of striker pin comprises the geometric profile limited by the discontinuous function in single order or second derivative.In modification, a part for cam portion does not enter into and contacts with composition surface.In modification, cam portion comprises two parts, various piece has the geometric profile limited by the continuous function in its single order or second derivative, be configured so that the Part I of each composition surface mainly performs the unlocking function of the pallet stone of escapement lever, and the Part II of each composition surface mainly performs the impact function of the pallet stone of escapement lever.
The geometric profile of the cam portion of composition surface and striker pin can comprise at least one part of the profile corresponding to gear teeth.
Wherein the pallet stone of escapement lever unblock and in impacting embodiment that two sense of rotation along device for disc perform, namely, locate in each semiperiod of the vibration of counterbalance, the composition surface entering into the fork contacted with striker pin can be symmetrical relative to the mid-plane of pitching.Cam face on the side of striker pin can be symmetrical with the cam face on the opposite side of pin, to realize along the identical joint between the pin and fork of two sense of rotation of counterbalance.
In one embodiment, fork can produce advantageous by deposition process such as photoetching process, or is produced by other method for making for semi-conductor industry of silica-base material.This makes the surface profile likely obtaining complicated shape with high precision.
In advantageous embodiment, the geometric profile of composition surface comprises gear profile.Striker pin also can advantageously comprise complementary gear profile.
In the first modification, gear profile is the involute urve of circular contour.The value (being such as respectively 6 and 31) of virtual " tooth " of the equal number had automatically can limit when a part for their formative gear systems advantageous by the value of designated module (such as, 0.2) and striker pin and escapement lever by this profile.
In the second modification, gear profile is for meeting the profile of Swiss Watch industry standard (NIHS) (such as, standard NIHS20-25).
Striker pin can have conventional shape, such as, and semilune.But striker pin can have optimizes profile with other of the profile complementation of composition surface, with elimination during unblock and Contact-impact or minimize slip.
Accompanying drawing explanation
Other favourable object of the present invention and aspect will require the detailed description with following examples at reading right, and manifest during accompanying drawing, in the figure:
Fig. 1 is according to an embodiment of the invention for the perspective schematic view of the escapement of watch module;
Fig. 2 a is the view of the fork striker pin structure of escapement according to an embodiment of the invention.
Fig. 2 b is the view of the fork striker pin structure of the escapement of the modification of embodiment according to Fig. 2 a.
Fig. 3 is the chart that the abrasion merit (or energy) that the curvilinear abscissa with the fork surface contacted with striker pin changes is shown, shows the comparison of the geometric configuration of three types: the involute urve of (i) circular impact pin and conventional fork, (ii) Swiss Watch industry standard (NIHS) profile and (iii) circular contour.
Fig. 4 is the chart of the torque being provided to counterbalance by escapement lever, it is simulated by the FEM of static state and produces, and shows the comparison of three geometric types: the involute urve of (i) circular impact pin and conventional fork, (ii) Swiss Watch industry standard (NIHS) profile and (iii) circular contour.
Fig. 5 a is the view of the fork striker pin structure of the escapement being according to another embodiment of the invention in the first assault phase.
Fig. 5 b is the view of the view being similar to Fig. 5 a, shows the second assault phase.
List of parts
2 counterbalances
3 escapements
5 take turns
9 teeth
7 escapement levers
11 pivots
13 forks
19 first fork angles (entering fork angle)
23 composition surfaces
23a Part I
23b Part II
23c center section (interruption)
21 second fork angles (exiting fork angle)
25 composition surfaces
25a Part I
25b Part II
25c center section (interruption)
27 protection pins
15 levers
17 pallet stones
17a enters escapement
17b exits escapement
4 device for disc
6 disks
10 striker pin
12 first cam portions (entering cam)
14 second cam portions (exiting cam)
8 safety discs
Otch.
Embodiment
With reference to accompanying drawing, the escapement for watch module comprises wheel 5, the escapement lever 7 with tooth 9, and is connected in the device for disc 4 of balance wheel 2.
Escapement lever comprises fork 13, pallet stone 17a, 17b, and makes pallet stone and pitch the lever 15 interconnected.Lever rotates by means of pivot 11 and is connected in movement framework.Pallet stone engages the tooth 9 of wheel, and this takes turns the energy source being connected to and rotating torques being delivered to wheel.A pallet stone is formed and enters pallet stone 17a, and pallet stone 17b is exited in another formation.Escapement lever also comprises the protection pin 27 being fixed on fork by means of the pin in the fixed orifice 27 at the base portion place being such as driven into fork.Shown mechanism corresponds to the escapement of Swiss lever type.Because this principle is known, therefore customary components and operation thereof will not be described in more detail in this manual.
Device for disc 4 comprises the platform disk 6 with striker pin 10, and is provided with the roundel 8 of the otch 16 for protecting pin.Striker pin 10 has the first cam portion 12 on side and the second cam portion 14 on another side.Along the direction (the first vibration) of the rotation of the counterbalance shown in Fig. 2 a and 2b, the first cam portion 12 is operating as and enters cam, and the second cam portion is as exiting cam.Because counterbalance has vibratory movement, therefore along another sense of rotation (the second vibration), the function of the first cam portion and the second cam portion is contrary.
Fork 13 has the first fork angle 19 and the second fork angle 21.Along the direction (the first vibration) of the rotation of the counterbalance shown in Fig. 2 a and 2b, the first fork angle 19 is operating as and enters fork angle, and the second fork angle is as exiting fork angle.Along another sense of rotation (the second vibration), the function at the first fork angle and the second fork angle is contrary.
First cam portion 12 of striker pin is configured to the composition surface 23 that angle pitched by joint first, and the second cam portion 14 is configured to the composition surface 25 that angle pitched by joint second.Enter into the composition surface contacted with cam portion and comprise on-plane surface geometric profile.
At such as Fig. 5 a, in the modification shown in 5b, composition surface 23,25 comprise Part I 23a, 25a and Part II 23b, 25b, Part I and Part II are interconnected by intermediate surface part 23c, and intermediate surface part 23c does not enter into and contacts with the cam portion of striker pin.Therefore, there is the interruption (interruption) entered in the striker pin of contact and the surface of fork.The various piece of composition surface can comprise the geometric profile limited by the continuous function in its single order or second derivative.Composition surface can be configured so that the Part I of each composition surface mainly performs the unlocking function of the pallet stone of escapement lever, and the Part II of each composition surface mainly performs the impact function of the pallet stone of escapement lever.
In unshowned embodiment, each in the cam portion of striker pin comprises the geometric profile limited by the discontinuous function in its single order or second derivative.The center section of cam portion does not enter into and contacts with composition surface.Cam portion can comprise two parts, various piece has the geometric profile limited by the continuous function in its single order or second derivative, it is configured so that the Part I of each composition surface mainly performs the unlocking function of the pallet stone of escapement lever, and the Part II of each composition surface mainly performs the impact function of the pallet stone of escapement lever.
An aspect of of the present present invention is for utilizing the suitably bending of active-surface (that is, the surface in contact of striker pin and escapement lever) and the gear tooth profile optimized simultaneously.Various types of profiles can be suitable for according to the centering of escapement and the striker pin of oscillator frequency and fork.In non-exclusive mode, the gear train of two kinds of particular types advantageously can be used:
(Fig. 2 a) for the profile of the first kind: NIHS
Via example, Swiss Watch industry standard (NIHS) profile meeting standard NIHS20-25 restriction can be used for having 0.2 module gear train of following parameter:
Quantity=6 of pinion gear teeth (balancing disk),
Quantity=21 of the gear teeth (escapement lever)
Head diameter=4.704mm
Root diameter=3.5mm
Transverse tooth thickness degree=0.282mm
Lancet radius=0.4032mm
Root radius=0.1526mm
The profile of Second Type: the involute urve (Fig. 2 b) of circle
This profile automatically limits according to the number of teeth (being such as, 6 and 21 respectively) of module (such as, module 0.2) and pinion wheel and wheel.
Utilize suitable gear tooth profile make likely to limit considerably specifically when assault phase starts contact two surfaces between slip (see Fig. 3).In fact, conventional fork/striker pin system presents significant slip when impacting and starting, and this is interpreted as wearing and tearing merit (sliding distance is multiplied by the product of the tangential force at contact point place) higher than other two systems (involute urve of Switzerland NIHS standard and circle contour).The shortening impacting sliding distance when starting reduces loss risk, and therefore increases the torque on escape wheel.In Conventional mechanisms, these phenomenons limit the development of movement.The increase of energy that can transmit via escapement makes likely to keep movement to have higher-energy (with therefore regulating power), such as, and about 1mJ, and conventional movement has the energy of about 0.1mJ.
Mechanism according to the present invention (such as, is greater than 10mg cm for having rather low-frequency rate (such as, being less than or equal to 4Hz) and having high inertia
2) oscillator, and/or the oscillator being equipped with the system moved freely for shortening escapement lever is advantageous particularly.
Fig. 3 show for three types geometric configuration, the wearing and tearing merit that changes with the curvilinear abscissa on the fork surface contacted with striker pin: (i) circular impact pin and conventionally pitch, the involute urve of (ii) Swiss Watch industry standard (NIHS) profile and (iii) circular contour.In these examples, the wearing and tearing merit for NIHS and involute contour is decreased to about 1/3 compared to conventional profile when function starts.Thus the energy (with therefore regulating power) being sent to counterbalance can be higher, and do not introduce the risk of added losses.
Relevant to the efficiency torque putting on counterbalance by escapement lever uses gear tooth profile and is almost equal for fork/striker pin gear train, and first impacts, in larger angle, (see Fig. 4) occur.In other words, the gross energy (region below curve) being sent to counterbalance uses gear tooth profile and is larger or equal.Result in figs. 3 and 4, can be estimated, the application of the invention, and the energy of movement (with therefore regulating power) can increase, and does not introduce the excessive loss risk of associated components.
Fig. 4 show for three types geometric configuration, the torque that is supplied to counterbalance during the first impact function according to the position of counterbalance: the involute urve of (i) circular impact pin and conventional fork, (ii) Swiss Watch industry standard (NIHS) profile and (iii) circular contour.When identical torque can be used on escape wheel, the profile of optimization makes likely almost identical torque to be sent to counterbalance, but with larger angular spacing (from 1 ° to larger 3 °).Therefore the gross energy (integration of curve) being sent to counterbalance between the first impact epoch of the first vibration uses these profiles and is larger or equal.
The profile of the 3rd type: many contour shapes (Fig. 5)
According to modification, each the gear train character in solution is used for wherein their the most effective assault phases.The principle of the 3rd solution is not only to be incorporated into few two kinds of types of profiles to fork but also to striker pin.Therefore, the contact during the Part I impacted appears on the profile of the first kind with less slip, and the contact during Part II appears on another profile.In example shown in Figure 5, (Fig. 5 a) such as occurs with the involute urve of circle contour the Part I of impact, and Part II (Fig. 5 b) occurs with routine fork/striker pin geometric configuration (round pin and plane fork).
The present invention also can be used for having English or with the escapement of shaft lever or the escapement of other known type.
The loss risk that advantage of the present invention comprises striker pin reduces, particularly for the short system moved freely allowing escapement lever, and increase the torque and impact interval, angle (with the energy being therefore sent to movement) that can be used for escapement lever simultaneously and do not increase the possibility of loss risk.
Claims (15)
1. the escapement for watch module (3), comprise the escapement lever (7) with fork (13) and the device for disc (4) with striker pin being connected in counterbalance (2), described fork comprises the first fork angle (19) and the second fork angle (21), described striker pin comprises the first cam portion (12) being configured to the composition surface (23) engaging described first fork angle, and be configured to second cam portion (14) of the composition surface (25) engaging described second fork angle, it is characterized in that, enter into the described composition surface contacted with described cam portion and comprise on-plane surface geometric profile.
2. escapement according to claim 1, is characterized in that, each in described composition surface (23,25) has the geometric profile limited by the discontinuous function in its single order or second derivative.
3. the escapement according to aforementioned claim, is characterized in that, at least center section (23c, 25c) of described composition surface does not enter into and contacts with the cam portion of described striker pin.
4. escapement according to claim 2, is characterized in that, described composition surface comprises two parts (23a, 23b; 25a, 25b), various piece has the geometric profile limited by the continuous function in single order described in it or second derivative, be configured so that the described Part I (23a of each composition surface, 25a) the main unlocking function performing the pallet stone of described escapement lever, and the described Part II (23b, 25b) of each composition surface mainly performs the impact function of the pallet stone of escapement lever.
5. escapement according to claim 1, is characterized in that, each in the described cam portion (12,14) of described striker pin comprises the geometric profile limited by the discontinuous function in its single order or second derivative.
6. the escapement according to aforementioned claim, is characterized in that, not entering at least partially of described cam portion contacts with described composition surface (23,25).
7. escapement according to claim 5, it is characterized in that, described cam portion comprises two parts, various piece has the geometric profile limited by the continuous function in single order described in it or second derivative, be configured so that the described Part I (23a of each composition surface, 25a) the main unlocking function performing the pallet stone of described escapement lever, and the described Part II (23b, 25b) of each composition surface mainly performs the impact function of the pallet stone of described escapement lever.
8. escapement according to claim 1, is characterized in that, the geometric profile of the cam portion of described composition surface (23,25) and described striker pin (12,14) comprises at least one part corresponding to gear tooth profiles.
9. escapement according to claim 8, is characterized in that, described gear profile is the involute urve of circle contour.
10. escapement according to claim 8, is characterized in that, described gear profile is for meeting the profile of Swiss Watch industry standard (NHIS).
11. escapements according to claim 1, is characterized in that, described first cam portion and described second cam portion symmetry.
12. escapements according to claim 1, is characterized in that, described fork and described striker pin are made up of the derivant of silica-base material or silicon.
13. escapements according to claim 1, is characterized in that, described fork and described striker pin are made by photoetching process or by LIGA method.
14. escapements according to claim 1, is characterized in that, described fork and described striker pin are made up of nickel-base material.
15. 1 kinds of watch modules comprising escapement, described escapement comprises the escapement lever (7) with fork (13) and the device for disc (4) with striker pin being connected in counterbalance (2), described fork comprises the first fork angle (19) and the second fork angle (21), described striker pin comprises the first cam portion (12) being configured to the composition surface (23) engaging described first fork angle, and be configured to second cam portion (14) of the composition surface (25) engaging described second fork angle, it is characterized in that, enter into the described composition surface contacted with described cam portion and comprise on-plane surface geometric profile.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13188951.1 | 2013-10-16 | ||
| EP13188951.1A EP2863272B1 (en) | 2013-10-16 | 2013-10-16 | Escapement mechanism for watch movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104570685A true CN104570685A (en) | 2015-04-29 |
| CN104570685B CN104570685B (en) | 2017-07-11 |
Family
ID=49354588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410543900.0A Active CN104570685B (en) | 2013-10-16 | 2014-10-15 | For the escapement of watch module |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2863272B1 (en) |
| JP (1) | JP6040209B2 (en) |
| CN (1) | CN104570685B (en) |
| HK (1) | HK1209853A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018002778A1 (en) * | 2016-06-29 | 2018-01-04 | Patek Philippe Sa Geneve | Mechanical clock movement |
| JP7485506B2 (en) | 2018-10-12 | 2024-05-16 | ロレックス・ソシエテ・アノニム | Regulators for small clock movements |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1523856A1 (en) * | 1966-06-11 | 1969-11-13 | Unterwagner Dipl Ing Emil | Anchor fork with a wide incision for anchor escapements |
| CH543757A (en) * | 1970-10-13 | 1973-03-30 | Ebauches Bettlach Sa | Anchor escapement for watch movement |
| CN1427316A (en) * | 2001-12-15 | 2003-07-02 | 里什蒙国际公司 | Constant force device |
| EP1538490A1 (en) * | 2003-12-04 | 2005-06-08 | Montres Breguet S.A. | Detent escapement for wrist-watches |
| CN1934506A (en) * | 2004-03-23 | 2007-03-21 | 阿苏拉布股份有限公司 | Device and method for fixing a pallet on an escapement anchor in a watch movement |
| US20120307601A1 (en) * | 2010-04-01 | 2012-12-06 | Patek Philippe Sa Geneve | Impact-proof timepiece escapement |
-
2013
- 2013-10-16 EP EP13188951.1A patent/EP2863272B1/en active Active
-
2014
- 2014-10-08 JP JP2014206914A patent/JP6040209B2/en active Active
- 2014-10-15 CN CN201410543900.0A patent/CN104570685B/en active Active
-
2015
- 2015-10-26 HK HK15110474.7A patent/HK1209853A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1523856A1 (en) * | 1966-06-11 | 1969-11-13 | Unterwagner Dipl Ing Emil | Anchor fork with a wide incision for anchor escapements |
| CH543757A (en) * | 1970-10-13 | 1973-03-30 | Ebauches Bettlach Sa | Anchor escapement for watch movement |
| CN1427316A (en) * | 2001-12-15 | 2003-07-02 | 里什蒙国际公司 | Constant force device |
| EP1538490A1 (en) * | 2003-12-04 | 2005-06-08 | Montres Breguet S.A. | Detent escapement for wrist-watches |
| CN1934506A (en) * | 2004-03-23 | 2007-03-21 | 阿苏拉布股份有限公司 | Device and method for fixing a pallet on an escapement anchor in a watch movement |
| US20120307601A1 (en) * | 2010-04-01 | 2012-12-06 | Patek Philippe Sa Geneve | Impact-proof timepiece escapement |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015078981A (en) | 2015-04-23 |
| HK1209853A1 (en) | 2016-04-08 |
| CN104570685B (en) | 2017-07-11 |
| EP2863272A1 (en) | 2015-04-22 |
| JP6040209B2 (en) | 2016-12-07 |
| EP2863272B1 (en) | 2020-11-25 |
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