JP2013181907A - Retrograde display mechanism, movement, analog watch provided with retrograde display mechanism and power switching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retrograde display mechanism capable of saving a cam follower part in accordance with reverse rotation of an operation cam, and an analog watch provided with the retrograde display mechanism.SOLUTION: A retrograde display mechanism 1 of an analog watch 2 has: a reference gear 32 rotated synchronously with a wheel 17 of a normal hand movement wheel train; an operation cam 4 rotated synchronously with the reference gear and provided with a cam surface 41 having a step part at a position of returning from the largest diameter part to the smallest diameter part; display parts 50, 60 for performing display in accordance with displacement of a cam follower part 51; and a swinging wheel mechanism 70 provided with a swinging intermediate gear structure 71 engaged with the reference gear, a swinging gear 77 engaged with the gear structure and a swinging lever 75 for supporting both the gears 71, 77, which has saving mechanisms 59, 55, 52 for saving the cam follower outside a rotation locus of the operation cam through a swinging gear at a first swinging position Q1 and a second swinging position in accordance with forward and backward rotations of the reference gear and a swinging gear of the swinging wheel mechanism existing at the second swinging position in accordance the backward rotation of the reference gear.

Description

  The present invention relates to a retrograde display mechanism, a movement, an analog timepiece having a retrograde display mechanism, and a power switching method.

  The cam surface has a cam surface whose diameter increases in accordance with an increase in the forward rotation angle, and has an operating cam with a stepped portion in the radial direction where the cam surface returns from the maximum diameter portion to the minimum diameter portion. In the retrograde display structure that performs time-dependent display according to the displacement of the cam follower in the form of an operating lever that contacts the cam surface, in order to avoid the operating lever from being stretched against the stepped portion of the operating cam, Normally, the reverse rotation of the working cam is prohibited, but it is known to allow the reverse rotation of the working cam (Patent Document 1).

  Patent Document 1 discloses that a time difference correction winding stem is pulled out to a time difference correction operation position in order to allow a reverse rotation of a working cam used in a retrograde type 24 o'clock display portion at the time of time difference correction. It is disclosed that the operating lever is retracted out of the range of the locus of the operating cam by a setting lever or the like interlocking with the time difference correcting winding stem according to the operation.

  However, in this case, when the hour wheel (cylinder wheel) is rotated in the forward direction by the time difference correction, the 24-hour display cannot be visually recognized simply by pulling out the time difference correction winding stem to correct the time difference. In addition, if the time difference correction mode is set so that the retrograde display is properly performed while reducing the time, the operating lever is retracted, so it is difficult to confirm whether the retrograde mechanism operates properly. Further, in this case, the arrangement of the display unit of the display mechanism is easily constrained in the vicinity of (time difference correction) winding stem.

  In order to avoid reverse rotation of the operation cam of the retrograde display structure, in order to avoid reverse rotation of the vehicle coaxial with the operation cam, the forward rotation force is applied to the coaxial vehicle, but the reverse rotation force is not applied. Providing claw portions has been variously proposed (for example, Patent Document 2 and Patent Document 3).

  In the case of Patent Document 2, during reverse rotation, the claw portion passes through the position disengaged from the coaxial vehicle and avoids application of reverse rotational force to the coaxial vehicle. Further, in Patent Document 3, the feeding claw is formed of an elastic arm portion, and it is possible to avoid transmitting the backward rotation by bending and escaping the feeding claw during the backward rotation.

  However, in these cases, since the rotation is not transmitted to the coaxial wheel of the working cam from the time when the reverse direction rotation starts, the synchronization is cut off, so that the passage of time is not transmitted to the working cam. Therefore, it is difficult to avoid a shift in information when displayed at the rotational position of the operating cam. For example, when intermittent rotation is sufficient, such as a day-of-week feed, inconvenience does not occur in many cases. However, even in that case, for example, there is a possibility that a deviation occurs when it overlaps with a daily change timing.

Japanese Patent No. 3140700 JP 2010-197077 A JP 2006-226990 A

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a retrograde display capable of detecting the reverse rotation and retracting the cam follower when the operating cam is rotated in the reverse direction. An object is to provide a mechanism and an analog timepiece having the mechanism.

  In order to achieve the above object, the retrograde display mechanism of the present invention is a reference gear that is rotated synchronously with a vehicle of a normal wheel train, and an operation cam that is rotated synchronously with the reference gear when rotated in the forward direction. Displayed in accordance with the displacement of the cam follower that comes into contact with the cam surface and the cam surface with a stepped portion where the distance from the center gradually increases and the diameter returns from the maximum diameter portion to the minimum diameter portion. A swing intermediate gear structure meshed with the reference gear, a rocking gear meshed with the rocking intermediate gear structure, and a rocking lever that supports the rocking intermediate gear structure and the rocking gear. A oscillating wheel mechanism capable of oscillating around the oscillating intermediate gear structure, wherein when the reference gear is rotated in the forward direction, the first oscillating position is adopted and the oscillating wheel mechanism is rotated in the opposite direction. The second swing position and the swing wheel mechanism are the second swing position. When the position is taken, the meshing gear is engaged with the swing gear, and the cam follower is retracted from the rotation locus of the operating cam according to the reverse rotation of the reference gear, and the swing wheel mechanism is moved to the first swing position. And a retracting mechanism for releasing the meshing with the swing gear when the mechanism is adopted.

  According to the retrograde display mechanism of the present invention, “a swinging intermediate gear structure meshed with a reference gear (synchronized with the operating cam and synchronized with the operating cam), and a rocking gear meshed with the swinging intermediate gear structure. An oscillating wheel mechanism including an oscillating gear, an oscillating intermediate gear structure, and an oscillating lever for supporting the oscillating gear, wherein the reference gear is rotated in the forward direction. The first swing position and the second swing position when rotated in the reverse direction, and the swing gear when the swing wheel mechanism takes the second swing position. In response to the reverse rotation of the reference gear, the cam follower is withdrawn from the rotation trajectory of the operating cam, and when the swing wheel mechanism takes the first swing position, the swing gear and And a retracting mechanism for releasing the meshing of the operating cam, so that the operating cam rotates in the reverse direction. In this case, the reference gear rotated synchronously with the operating cam is also rotated in the reverse direction to swing the swing wheel mechanism to the second swing position, and the swing gear of the swing wheel mechanism retracts the cam follower by the retract mechanism. Therefore, it can be avoided that the cam follower hits the stepped portion of the operating cam. Further, in this retrograde display mechanism, the reference gear synchronized with the car in the normal wheel train is kept synchronized with the car in the hand train regardless of the direction of rotation of the cam, and the operating cam is kept in the synchronous rotation position. Therefore, when the cam follower that has been retracted after the reverse rotation of the working cam has come into contact with the cam surface of the working cam again, the correct time is displayed on the display unit equipped with the cam follower. obtain. In this retrograde display mechanism, when the operating cam rotates in the forward direction, the reference gear and the operating cam are kept in a normal operating state, so that an appropriate display is continuously displayed on the display unit provided with the cam follower. Can be done.

  In the retrograde display mechanism of the present invention, typically, the maximum diameter portion of the operating cam extends in a bowl shape, and the cam on the minimum diameter portion side extends farther than a virtual line connecting the maximum diameter portion and the rotation center. A concave portion whose one side is defined by the extending portion of the surface is formed.

  In this case, the cam follower can be withdrawn regardless of the start point of the reverse rotation of the operating cam, even if the retrograde display portion is not a discrete display but a continuous display by a jumper. In other words, the cam follower can be retracted through the recess even if the cam follower starts to reverse immediately after the cam follower falls from the maximum diameter portion to the minimum diameter portion of the cam surface of the operation cam. The evacuation of the node can be surely performed.

  In such a case, in the retrograde display mechanism of the present invention, typically, the operation cam is configured to rotate integrally with the reference gear, and the reference gear is a 24-hour gear.

  In that case, even if the reverse rotation of the operating cam starts immediately after shifting from 24 o'clock to 0 o'clock, and the portion displayed retrograde displays continuously every 24 hours, the cam follower Retraction can take place through the recess.

  In such a case, in the retrograde display mechanism of the present invention, the cam follower typically includes an arm portion that is elastically supported so as to be bent.

  In that case, even if the reverse rotation of the operating cam starts immediately after shifting from 24 o'clock to 0 o'clock, and the portion displayed retrograde displays continuously every 24 hours, the cam follower Even if the retreat passes through the concave portion and the side edge of the tip portion of the arm portion hits the maximum diameter portion protruding like a bowl, the retraction can be surely performed by elastically bending.

  In the retrograde display mechanism of the present invention, the operation cam may be configured to rotate integrally with the day transmission wheel meshed with the reference gear, and the day transmission wheel may be controlled by a day jumper.

  Even in that case, the same effect can be obtained. In that case, typically, the operation cam is configured to rotate integrally with the day transmission wheel meshed with the reference gear, and the day transmission wheel is dramatically controlled by the day jumper.

  In the retrograde display mechanism of the present invention, typically, the rocking wheel mechanism is configured to increase the speed and retract the cam follower.

  In this case, since the cam follower can be quickly retracted out of the locus of the operating cam, the possibility of hitting the stepped portion even when the operating cam is reversed can be minimized.

  In the retrograde display mechanism of the present invention, typically, the oscillating intermediate gear structure includes a first oscillating intermediate gear meshed with the reference gear, a shaft coaxial with the first oscillating intermediate gear, and a shaft thereof. And a second swing intermediate gear slip-engaged with the first swing intermediate gear, and the second swing intermediate gear meshes with the swing gear.

In order to achieve the above object, the movement of the present invention includes the above-described retrograde display mechanism and a ground plane including the retrograde display mechanism.
In order to achieve the above object, an analog timepiece of the present invention has the retrograde display mechanism as described above and a timepiece case including the retrograde display mechanism.
In the power switching method in the retrograde display mechanism of the present invention, a reference gear that is rotated synchronously with a normal wheel train and an operation cam that is rotated synchronously with the reference gear and is rotated from the center when rotated in the forward direction. A display with a cam surface with a stepped portion where the distance from the largest diameter portion returns to the smallest diameter portion in a shape that gradually increases, and a display that displays according to the displacement of the cam follower portion that contacts the cam surface A swing intermediate gear structure meshed with the reference gear, a swing gear meshed with the swing intermediate gear structure, and a swing lever that supports the swing intermediate gear structure and the swing gear. A swing wheel mechanism that can swing around a moving intermediate gear structure, wherein the reference gear takes a first swing position when rotated in the forward direction and is rotated when the reference gear is rotated in the reverse direction; The rocking wheel mechanism taking two rocking positions, and A step of engaging the swing gear with the swing gear when the moving vehicle mechanism takes the second swing position and retracting the cam follower out of the rotation locus of the operating cam according to the reverse rotation of the reference gear. And a step of releasing the meshing with the rocking gear when the rocking wheel mechanism takes the first rocking position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external explanatory view of an analog timepiece according to a preferred embodiment of the present invention equipped with a 24-hour retrograde display mechanism according to a preferred embodiment of the present invention as viewed from the dial side. FIG. 2 is an explanatory plan view showing a state in which the car of the 24-hour retrograde display mechanism in FIG. 1 is rotating in the forward direction like normal hand movement or forward hand rotation. III-III sectional view explanatory drawing of FIG. IV-IV sectional view explanatory drawing of FIG. FIG. 1 is a plan view showing a state in which the reverse hand turning is performed in the 24-hour retrograde display mechanism of FIG. 1 so that the arm portion forming the cam follower is retracted out of the rotation locus of the operating cam and the related vehicle is rotating in the reverse direction. Illustration. In the 24-hour retrograde display mechanism of FIG. 1, the reverse hand rotation is performed as shown in FIG. 5, and the arm portion forming the cam follower is retracted out of the rotation locus of the operating cam, so that the 24-hour display hand is in the retracted position. The external appearance explanatory drawing similar to FIG. FIG. 6 is an explanatory plan view similar to FIG. 2 and FIG. 5, showing a state in which the reverse hand rotation is started immediately after the transition from 24:00 to 0:00, for the 24-hour retrograde display mechanism of the analog timepiece of FIG. FIG. 8 is an explanatory plan view similar to FIG. 7, showing a state in which about 26 minutes have elapsed after the reverse hand rotation is started immediately after the transition from 24:00 to 0 o'clock for the 24-hour retrograde display mechanism of the analog timepiece of FIG. 1. FIG. 8 is an explanatory plan view similar to FIG. 7 showing a state in which about 40 minutes have elapsed after the reverse hand rotation is started immediately after the transition from 24 o'clock to 0 o'clock for the 24-hour retrograde display mechanism of the analog timepiece of FIG. 1. FIG. 8 is an explanatory plan view similar to FIG. 7 showing a state in which about 1 hour has elapsed after the reverse hand rotation is started immediately after the transition from 24 o'clock to 0 o'clock for the 24-hour retrograde display mechanism of the analog timepiece of FIG. 1. About the 24-hour retrograde display mechanism of the analog timepiece of FIG. 1, a plane explanatory view similar to FIG. 7 showing a state in which about 1 hour and 1 minute have passed after the reverse hand rotation is started immediately after the transition from 24:00 to 0:00. . With respect to the 24-hour retrograde display mechanism of the analog timepiece of FIG. 1, after the reverse hand rotation started immediately after shifting from 24:00 to 0:00, the arm part that forms the cam follower returns to the original position and returns to the original position. FIG. 8 is an explanatory plan view similar to FIG. 7 showing a state in which the display at 24:00 is performed. In another preferred embodiment of the analog timepiece of the present invention equipped with the day retrograde display mechanism of the present invention, the day retrograde display mechanism (which can be rotated in the reverse direction) Plane explanatory drawing which showed the state rotated in the forward direction like this.

  A preferred embodiment of the present invention will be described based on a preferred embodiment shown in the accompanying drawings.

  FIG. 1 to FIG. 12 show a preferred embodiment of the present invention including a movement 300 of a preferred embodiment of the present invention having a 24-hour retrograde display mechanism 1 as a retrograde display mechanism of a preferred embodiment of the present invention. An analog timepiece 2 is shown.

The timepiece 2 has an appearance 3 as shown in FIG. That is, the timepiece 2 includes a time display hand 11 including an hour hand 11a, a minute hand 11b, and a second hand 11c so as to be rotatable around the central axis C in a clockwise direction C1. The dial 12 of the timepiece 2 has a typesetting 12a that represents the position at the hour. The timepiece 2 also has a fan-shaped 24 o'clock retrograde display area 13 that extends between the 4 o'clock and 8 o'clock positions around the central axis D at the 6 o'clock position, and the area 13 includes D1 In the direction, a scale indicating the time from 0 o'clock to 24 o'clock and a 24-hour display 13a composed of characters are attached. In the 24-hour display area 13, the 24-hour display hand 64 can rotate in the direction D1 around the central axis D from the position of 0 o'clock to the position of 24 o'clock. Rotate in the direction and return to the 0 o'clock position. 14 is a watch case, 15 is a crown attached to the winding stem 15a.
An example of the movement 300 (driving body) is a portion obtained by removing a so-called exterior portion (case 14, hour hand 11a, etc.) from the timepiece 2, and includes a mainspring of a power source, a driving gear (hour wheel 17 etc.) for moving the hands, etc. It is configured to include a speed adjusting / escape mechanism for controlling the rotational speed of the gear, or the hand winding mechanism 2 and the like, and can be distributed alone.

  In the following description of this specification, forward rotation, forward direction (rotation), or forward hand rotation (direction) means 24 o'clock when the wheel of the wheel train is rotated in the same direction as when it is in the normal hand movement state. The direction in which each vehicle of the retrograde display mechanism 1 is rotated, or the rotation thereof, is the reverse direction (rotation) or the reverse hand rotation (direction) is when the vehicle in the wheel train is in a normal hand movement state. The direction in which each vehicle of the 24-hour retrograde display mechanism 1 is rotated in the direction opposite to the direction in which the vehicle is rotated or is rotated in such a manner.

  As shown in the plan explanatory view of FIG. 2 and the cross-sectional explanatory views of FIG. 3 and FIG. An intermediate wheel 23, a 24-hour second intermediate wheel 26 meshed with the 24-hour first intermediate wheel 23, and a 24-hour reference gear that meshes with the 24-hour second intermediate wheel 26 and rotates synchronously with the hour wheel 17. An operating lever 50 including a gear 32, a 24-hour retrograde operating cam 40 coaxially and integrally with the 24-hour gear 32, a cam arm portion 51 and a sector gear portion 52 that are cam followers with respect to the operating cam 40. A 24-hour display wheel portion 60 including a 24-hour display gear 62 meshed with the sector gear portion 52, and a rocking wheel mechanism 70 including a rocking intermediate wheel 71 and a rocking wheel 77 meshed with the 24-hour gear 32. Have. The 24-hour gear 32 and the operation cam 40 constitute a 24-hour wheel 30 as a unit. The 24-hour second intermediate wheel 26, the 24-hour wheel 30, the operating lever 50, and the swinging intermediate wheel 71 are rotatable around the central axes E, F, G, and H, respectively.

  The working cam 40 has a spiral cam surface 41 whose distance from the center gradually increases when rotated in the forward direction F1. The operating cam 40 also retreats in the F1 direction with respect to the virtual line Fi connecting the maximum diameter portion 42 of the cam surface 41 and the center F, and allows reverse rotation of the operating cam 40 in the F2 direction (for example, see FIG. A small-diameter wall portion 44, a side wall portion 45, and a flange portion 46 that define the concave portion 43 to be formed. The small-diameter wall portion 44 forms an extended portion in which the minimum diameter portion 47 of the cam surface 41 extends in the direction of the concave portion 43.

  The actuating lever 50 has an actuating lever main body 53 including a sector gear portion 52, and the actuating lever main body 53 has a proximal end arm portion 54 that extends in a radial direction from one side of the sector gear portion 52. The actuating lever 50 also has an actuating lever pin 55 that can rotate in the G1 and G2 directions around the central axis G integrally with the actuating lever main body 53.

  The cam arm portion 51 of the operation lever 50 includes a proximal end side arm portion 54 integrated with the operation lever main body portion 53 and a distal end side engagement arm portion 58. The distal end side engagement arm portion 58 is attached to the distal end portion 54a of the proximal end side arm portion 54 so as to be rotatable in the K1 and K2 directions around the central axis K, and the distal end portion 58a is a contact portion of the cam follower. Work as. A leaf spring 57 is further attached to the operating lever main body 53. The leaf spring 57 extends substantially along the base end side arm portion 54 of the cam arm portion 51 from the base end portion 56 fixed to the actuating lever main body 53 and elastically in the J1 and J2 directions. Can bend. The leaf spring 57 pushes the proximal end portion 58b of the distal end engaging arm portion 58 with the distal end portion 57a in the J1 direction, and in a normal display state, the leaf spring 57 is applied to the locking pin 54b of the distal end portion 54a of the proximal end side arm portion 54 in the K1 direction. The distal end engaging arm portion 58 is positioned at the rotation reference position P1 in the K1 direction with respect to the proximal end side arm portion 54.

  The 24-hour display wheel portion 60 includes a central shaft 63 that can rotate around the central axis D in the directions D1 and D2. The tip of the central shaft 63 protrudes beyond the dial plate 12, and a 24-hour indicator hand 64 is attached to the protruding end 63a (FIG. 1). A 24-hour indicating wheel return spring 65 in the form of a spiral spring is attached to the central shaft 63 and exerts an elastic biasing force in the D2 direction on the central shaft 63.

  A rocking intermediate wheel 71 as a rocking intermediate gear structure of the rocking wheel mechanism 70 is fixed to a first rocking intermediate wheel 73 and a rotating shaft 72 that are slip-engaged via a rocking intermediate wheel rotating shaft 72. And a second swing intermediate wheel 74. The second swing intermediate wheel 74 of the swing intermediate wheel 71 is engaged with a swing wheel (swing gear) 77 and is connected by a swing lever 75. The swing lever 75 is elastically engaged with the rotation shaft 72 of the second swing intermediate wheel 74 on one end 75a side, and is fitted on the rotation shaft 77a of the swing wheel 77 on the other end 75b side. The rotation shaft 77a of the swing wheel 77 can swing in the HW1 and HW2 directions around the central axis H along the extending direction of the arcuate holes 7a and 8a of the second base plate 7 and the second train wheel bridge 8. The rocking wheel mechanism 70 and the rocking wheel 77 take the normal rotation reference position Q1 when swung in the HW1 direction, and the rocking wheel mechanism 70 and the rocking wheel 77 are reversed when swung in the HW2 direction. The swing position Q2 is taken. That is, in the following, Q1 and Q2 represent the swing position of the swing wheel mechanism 70 and the swing position of the swing wheel 77 at the tip of the swing wheel mechanism 70, respectively.

  The operation lever intermediate wheel 59 is engaged with the operation lever pinion 55 of the operation lever 50, and the swing lever 75 and the swing wheel 77 of the swing wheel mechanism 70 are rotated in the HW1 direction to the normal rotation swing position Q1. In some cases, the swing wheel 77 is separated from the operation lever intermediate wheel 59 and is not meshed with the intermediate wheel 59, and the swing lever 75 and the swing wheel 77 of the swing wheel mechanism 70 rotate in the HW2 direction. Then, when the reverse swing position Q2 is taken, the swing wheel 77 is engaged with the operation lever intermediate wheel 59.

  Next, the operation of the 24-hour retrograde display mechanism 1 of the analog timepiece 2 configured as described above will be described.

  When the hour wheel 17 having the hour hand 11a rotates forward in the C1 direction as in normal hand movement, as shown in FIG. 2, the 24-hour first intermediate wheel 23 integrated with the hour wheel 17 also rotates in the C1 direction. The 24-hour second intermediate wheel 26 meshed with the intermediate wheel 26 rotates in the E1 direction, and the 24-hour gear 32 meshed with the intermediate wheel 26 rotates in the F1 direction. The cam 40 also rotates forward in the F1 direction.

  The cam arm portion 51 that is in contact with the cam surface 41 of the operating cam 40 at the front end 58a is rotated in the G1 direction in accordance with the forward rotation of the operating cam 40 in the F1 direction. 52 also rotates in the G1 direction, rotates the 24-hour display gear 62 meshed therewith in the D1 direction, and causes the 24-hour display hand 64 to move through the rotating shaft 63 of the 24-hour display wheel section 60. In FIG. 13, the display is rotated in the direction D1 to display 24 hours.

  Further, according to the rotation of the 24-hour gear 32 in the F1 direction, the oscillating intermediate wheel 71 engaged therewith rotates in the H1 direction, and the rotating shaft 77a of the oscillating wheel 77 connected via the oscillating lever 75 is moved in the HW1 direction. And the swing wheel 77 meshed with the swing intermediate wheel 71 is rotated in the M1 direction. Accordingly, the rocking wheel 77 takes the rotation position Q1 in the HW1 direction, and the rocking wheel 77 freely rotates without being engaged with the actuating lever intermediate wheel 59. Therefore, the rocking wheel mechanism 70 includes the actuating lever 50 and the 24-hour display wheel part. The operation of 60 is not affected.

  On the other hand, when the hour wheel 17 is reversed in the C2 direction for needle alignment or the like, as shown in FIG. 5, the 24-hour first intermediate wheel 23 integrated with the hour wheel 17 also rotates in the C2 direction. The 24-hour second intermediate wheel 26 engaged with the intermediate wheel 26 rotates in the E2 direction, and the 24-hour gear 32 engaged with the intermediate wheel 26 rotates in the F2 direction. Also reverse in the F2 direction.

  As the 24-hour gear 32 rotates in the F2 direction, the oscillating intermediate wheel 71 engaged therewith rotates in the H2 direction, and the rotating shaft 77a of the oscillating wheel 77 connected through the oscillating lever 75 rotates in the HW2 direction. The rocking wheel 77 that is moved or rocked and meshed with the rocking intermediate wheel 71 is rotated in the M2 direction. Accordingly, the swing wheel 77 takes the rotation position Q2 in the HW2 direction, the swing wheel 77 meshes with the operation lever intermediate wheel 59, and rotates the operation lever intermediate wheel 59 in the N2 direction. Accordingly, the operating lever pinion 55 engaged therewith is rotated in the G1 direction. As a result, the operating lever main body 53 including the sector gear 52 is also rotated in the G1 direction, and the cam arm 51 is retracted out of the locus of the operating cam 40. At this time, the proximal end side arm portion 54 of the cam arm portion 51 is positioned at the retracted position Rf where the operating lever degree determining pin 8c comes into contact. In this case, the retracting mechanism includes an operation lever intermediate wheel 59, an operation lever pinion 55, and an operation lever main body 53. When the cam arm 51 is positioned at the retracted position Rf (FIG. 5), the 24-hour display hand 64 is also positioned at the display retracted position Rp (FIGS. 5 and 6) according to the sector gear 52 and the display gear 62. Is done.

  Therefore, according to the rotation of the 24-hour gear 32 in the F2 direction, even if the operating cam 40 rotates in the F2 direction, the cam arm portion 51 hits the radially extending wall portion 45 forming the stepped portion of the operating cam 40 and the operating cam 40 There is no possibility of hindering the rotation of 40.

  Here, even when the 24-hour wheel 30 is reversed, the 24-hour gear 32 is kept in mesh with the 24-hour second intermediate wheel 26, so that the cam arm portion 51 is separated from the cam surface 41 of the operating cam 40. Even during this period, the rotation position (rotation phase) of the 24-hour wheel 30 is always kept at a predetermined position. Therefore, an appropriate time can be displayed when the cam arm portion 51 comes into contact with the cam surface 41 of the operating cam 40 again regardless of whether or not there is reverse rotation.

  Next, in the analog timepiece 2 equipped with the 24-hour retrograde display mechanism or the retrograde-type 24-hour display mechanism 1, in the most severe environment, that is, in the case where the reverse hand is turned immediately after the retrograde display shifts from 4:00 to 0:00. The operation will be described in detail with reference to FIGS. 7 to 12 in addition to FIGS.

  FIG. 7 shows a state S1 in which the reverse hand rotation is started immediately after the retrograde display shifts from 24 o'clock to 0 o'clock in the analog timepiece 2 provided with the retrograde type 24-hour display mechanism 1.

  That is, in the substantially 0 o'clock state S1, the distal end 58a of the distal end side engaging arm 58 of the cam arm 51 is substantially the smallest diameter portion of the cam surface 41 of the operating cam 40. At position 47. This position 47 is a position where the aforementioned imaginary line Fi (FIG. 2) substantially intersects with the cam surface 41, more strictly, as shown in FIG. 7, it has reached the maximum diameter portion 42 of the cam surface 41. When the distal end portion 58a of the distal end side engagement arm portion 58 of the cam arm portion 51 is disengaged from the maximum diameter portion 42, the sector gear portion 52 of the operating lever 50 returns to the G2 direction under the action of the 24-hour display wheel return spring 65, In response to this, the distal end portion 58a of the distal end side engagement arm portion 58 of the cam arm portion 51 rotates around the central axis G while drawing a circular arc Fic in the G2 direction. is there.

  When the reverse hand rotation is started, as shown in FIG. 7, the 24-hour first intermediate wheel 23 integrated with the hour wheel 17 rotates in the C2 direction, and accordingly, the 24-hour second intermediate wheel 26 is changed to E2 , And the 24-hour gear 32 rotates in the F2 direction, whereby the oscillating wheel mechanism 70 at the oscillating position Q1 starts to rotate in the HW2 direction. The operating cam 40 integrated with the 24-hour gear 32 also starts to rotate in the F2 direction.

  When reverse rotation is started and the rotational position of the moving wheel train reaches a rotational position returned by, for example, about 26 minutes, as shown in FIG. 8, the swing wheel 77 of the swing wheel mechanism 70 swings in the HW2 direction. Reaches the state S2 in the position Q2 where it engages with the actuating lever intermediate wheel 59. As a result, the operating lever intermediate wheel 59 starts to rotate in the N2 direction by the swinging intermediate wheel 71 rotating in the H2 direction and the swinging wheel 77 rotating in the M2 direction in response to the rotation of the gear 32 in the F2 direction. 55 and the operating lever main body 53 integrated therewith begin to rotate in the G1 direction. At this point, the operating cam 40 is rotated approximately in the F2 direction by about 6.5 degrees as compared with the state of FIG. 7, so that the distal end portion 58a of the distal end side engaging arm portion 58 of the cam arm portion 51 is The cam surface 41 enters the recess 43 more than the 0 o'clock position 47 by 6.5 degrees.

  When the reverse hand rotation is started and the rotational position of the moving wheel train is reached, for example, about 40 minutes, the rotational position is returned to the H2 direction according to the F2 direction rotation of the gear 32 for 24 hours as shown in FIG. In accordance with an operating lever intermediate wheel 59 rotated in the N2 direction via a rotating swing intermediate wheel 71 rotating in the M2 direction and an operating lever intermediate wheel 59 rotated in the N2 direction, an operating lever main body 53 and a cam arm integrated therewith. The proximal end side arm portion 54 of the portion 51 also rotates in the G1 direction, and accordingly, the distal end side arm portion 58 of the cam arm portion 51 that has been rotated in the G1 direction and moved in the concave portion 43 is actuated cam 40. The state S3 comes into contact with the side edge 42a of the collar portion 42 of the. After this state S3, as the reverse needle is rotated, the distal arm 58 is rotated against the spring force of the leaf spring 57 by the reaction force from the side edge 42a of the flange 42 of the operating cam 40. A bent state or position P2 is taken by turning in the K2 direction from P1.

  When the reverse hand rotation is started and the rotational position of the handwheel train is reached, for example, when the rotational position is returned for about one hour, as shown in FIG. 10, in the H2 direction according to the F2 direction rotation of the gear 32 for 24 hours. In accordance with an operating lever intermediate wheel 59 rotated in the N2 direction via a rotating swing intermediate wheel 71 rotating in the M2 direction and an operating lever intermediate wheel 59 rotated in the N2 direction, an operating lever main body 53 and a cam arm integrated therewith. The proximal end side arm portion 54 of the portion 51 also rotates in the G1 direction, and accordingly, the reaction force from the side edge 42a of the flange portion 42 of the operating cam 40 resists the spring force of the leaf spring portion 57 in the K2 direction. The distal end side arm portion 58 that has been rotated to the state reaches the state S4 that comes out of the side edge 42a of the collar portion 42 of the operating cam 40. When the extraction is completed, the distal arm 58 is rotated in the K1 direction under the action of the leaf spring 57 and returns to the original position with respect to the proximal arm 54.

When reverse rotation is started and the rotational position of the moving wheel train reaches the rotational position returned by about 1 hour and 1 minute, for example, as shown in FIG. In accordance with an operating lever intermediate wheel 59 rotated in the N2 direction via a rotating intermediate wheel 71 rotating in the direction and an operating wheel 77 rotating in the M2 direction, the operating lever pinion 55 and the operating lever main body 53 integrated therewith The base end side arm portion 54 of the cam arm portion 51 is further rotated in the G1 direction, and the base end side arm portion 54 adopts a retracted position or standby position Rf where the base end side arm section 54 abuts against the actuating lever degree determining pin or the locking pin 8c. To reach. At the retracted position Rf, the distal end side arm portion 58 of the cam arm portion 51 is in a state of being retracted away from the rotation locus of the operating cam 40 completely. The degree to which the reverse hand rotation is performed in this retracted state is accurately reflected in the rotational position of the 24-hour wheel 30. That is, the 24-hour wheel 30 and its operating cam 40 always hold the accurate time information corresponding to the rotation position of the hour wheel 17 as the rotation position even during reverse rotation in the F2 direction.
Since the first swing intermediate wheel 73 and the second swing intermediate wheel 74 of the swing intermediate wheel 71 are slip-engaged via the shaft 72, after the swing wheel mechanism 70 reaches the position Q2. The rotation or swinging force in the HW2 direction can be released by sliding at the slip engagement portion.

  When the reverse hand turning is completed and the forward hand turning is started again, as shown in FIG. 12, the 24-hour first intermediate wheel 23 integrated with the hour wheel 17 rotates again in the C1 direction. Accordingly, the 24-hour second intermediate wheel 26 rotates in the E1 direction, and the 24-hour gear 32 rotates in the F1 direction, so that the rocking wheel mechanism 70 in the rocking position Q2 is rotated in the HW1 direction. The pivoting wheel 77 returns from the position Q2 where the swing wheel 77 meshes with the operating lever intermediate wheel 59 to the non-meshing position Q1. Therefore, the main body 53 including the sector gear 52 of the operating lever 50 is rotated in the G2 direction under the action of the 24-hour display wheel return spring 57. The rotation in the G2 direction is completed when the distal end portion 58a of the distal end side arm portion 58 of the cam arm portion 51 returns to a state where it abuts on the cam surface 41 of the operating cam 40. Thereafter, the 24-hour display starts again according to the rotation of the working cam 40 of the 24-hour wheel 30 in the F1 direction. In addition, since the 24-hour wheel 30 rotates synchronously with the hour wheel 17 regardless of the degree of the reverse hand rotation, an appropriate display can be performed on the 24-hour display unit 60.

  In the case of the 24-hour retrograde display mechanism 1 configured as described above, the related wheel train may be disposed in the vicinity of the operating cam 40. An area for performing time display can be selected from a wide range.

  Instead of displaying the progress of the retrograde display mechanism as it repeats every unit time interval (24 hours in this example) like the retrograde display mechanism or retrograde display mechanism 1 A weekly retrograde display mechanism or a retrograde day display mechanism 1A may be used that displays the progress of jumping like a day (for example, a day of the week) in a retrograde manner as a weekly repetition.

  FIG. 13 shows the week retrograde display mechanism 1A of the analog timepiece 2A. Elements corresponding to those of the 24-hour retrograde display mechanism 1 of the analog timepiece 2 shown in FIGS. 1 to 12 among the elements shown in FIG.

  In the week retrograde display mechanism 1A, the first intermediate wheel 23A integrated with the hour wheel is directly meshed with the 24-hour gear 32A as the reference gear to ensure synchronous rotation. The 24-hour wheel 30A includes a day-turning claw 33 that is concentric with and integral with the 24-hour gear 32A. In the weekly retrograde display mechanism 1A, the 24-hour gear 32A meshes with the swing intermediate wheel 71A of the swing wheel mechanism 70A via the second intermediate wheel 78 instead of directly meshing with the wheel of the swing wheel mechanism.

  Since the week retrograde display mechanism 1A displays the day of the week, instead of the operation cam being integrated with the 24-hour gear, the day retrograde operation cam 40A is integrated with the day transmission wheel 70 meshed with the 24-hour gear 32A. Has been. The jumping claw 81 of the day jumper 80 is engaged with the teeth 71 and 71 of the day transmission wheel 70, and a jumping operation is performed according to the rotation of the day transmission wheel 70 in the L1 direction. A cam arm portion 51A that forms part of the operating lever 50A is engaged with the day retrograde operating cam 40A as a cam follower.

  In the weekly retrograde display mechanism 1A of the analog timepiece 2A configured as described above, the 24-hour gear 32A is used when the first intermediate wheel 23A is rotated in the C1 direction in accordance with the rotation of the hour wheel in the normal hand movement direction. The day-rotating claw 33 rotates in the F2A direction, and accordingly, the day transmitting wheel 70 and the day retrograde operating cam 40A, which are dramatically controlled by the day jumper 80, rotate intermittently in the L1 direction, and the operating cam 40A is operated by the cam arm 51A. The actuating lever 50A in contact with the cam surface 41A rotates in the G1A direction, and the day indicator wheel 62A rotates in the D1 direction to perform day retrograde display.

  On the other hand, in the week retrograde display mechanism 1A of the analog timepiece 2A, when the reverse hand rotation is performed, the 24-hour gear 32A and the day of the week according to the C2 direction rotation of the first intermediate wheel 23A accompanying the reverse rotation of the hour wheel. The rotation pawl 33 rotates in the F1A direction, and accordingly, the second intermediate wheel 78 rotates in the E1A direction, the swing intermediate wheel 71A rotates in the H2A direction, and the swing wheel 77A rotates in the M2A direction. The swing wheel mechanism 70A swings (rotates) in the HW2 direction, the swing wheel 77A meshes with the operation lever intermediate wheel 59A and rotates it in the N2A direction, and the intermediate wheel 59A moves the operation lever pinion 55A in the G1A direction. The cam arm 51A is rapidly moved out of the rotation locus of the day retrograde actuating cam 40A by rotating at an increased speed. Therefore, even if the day retrograde operation cam 40A is reversed in the L2 direction via the day transmission wheel 70 by the day rotation finger 33, there is no possibility that the transition surface portion hits the cam arm portion 51A and the rotation thereof is hindered.

  Since the day transmission wheel 70 is dramatically controlled at the intermittent rotation position by the day jumper 80, the minimum diameter portion 47A from the position of the maximum diameter portion 42A corresponding to the weekend day of the cam surface 41A of the day retrograde operation cam 40A. Even when the cam arm portion 51A falls to the position, the actuating cam 40A takes an intermittent rotation position corresponding to the day of the week, so that the distal end portion 58aA of the cam arm portion 51A is a transition wall portion between the maximum diameter portion 42A and the minimum diameter portion 47A. A position away from 43A can be taken. Therefore, unlike the 24-hour retrograde mechanism, a space 45A allowing the swinging of the cam arm portion 51A can be automatically secured before the transition wall portion 43A in the case of reverse rotation. The recess may not be provided.

1 24 o'clock retrograde display mechanism (retrograde type 24 o'clock display mechanism)
1A Day retrograde display mechanism (retrograde day display mechanism)
2,2A Analog watch 3 Appearance 7 Second base plate 7a, 8a Arc-shaped hole 8 Second train wheel bridge 8c, 8cA Actuating lever degree determining pin (locking pin)
11 Time display hand 11a Hour hand 11b Minute hand 11c Second hand 12 Dial 12a Typesetting 13 24 hour retrograde display area 13a 24 hour display 14 Clock case 15 Crown 15a Winding stem 17 Hour wheel (hour wheel)
23 24 hour first intermediate wheel 23A 1st intermediate wheel 26 24 hour second intermediate wheel 30, 30A 24 hour wheel 32, 32A 24 hour gear 33 Day-of-week pawl 40 24 hour retrograde operation cam 40A Day retrograde operation cam 41, 41A cam Surface 42, 42A Maximum diameter portion 42a Side edge 43 Recess 44 Small diameter wall portion 45 Side wall portion 46 Gutter portion 47, 47A Minimum diameter portion 50, 50A Actuating lever 51, 51A Cam arm portion 52 Fan-shaped gear portion 53 Acting lever main body portion 54 Base End side arm portion 54a End portion 54b Locking pin 55, 55A Actuating lever pin 56 Base end portion 57 Leaf spring 57a Tip portion 58 End side engaging arm portion 58a Tip end portion 58b Base end portion 59, 59A Actuating lever intermediate wheel 60 24 Hour display wheel 60A Day display wheel 62 24 hour display gear 62A Day display wheel 63 Central axis (rotary shaft)
63a Protruding end 64 24-hour indication hand (24-hour hand)
64A Day indicator hand 65 24 hour indicator wheel return spring 65A Day indicator wheel return spring 70, 70A Oscillating wheel mechanism 71, 71A Oscillating intermediate wheel (oscillating intermediate gear structure)
72 Swing intermediate wheel rotation shaft 73 First rocking intermediate wheel 74 Second rocking intermediate wheel 75, 75A Swing lever 75a One end 75b Other end 77, 77A Swing wheel 77a Rotating shaft 78 Intermediate wheel 80 Day jumper 81 Day jump system Claw 300 Movement C, D, E, F, G, H, K Center axis C1, C2, D1, D2, E1, E1A, E2, E2A, F1, F1A, F2, F2A, G1, G1A, G2, H1, H1A, H2, H2A, K1, K2, L1, L2, M1, M1A, M2, M2A, N2, N2A Rotation (rotation) direction Fi Virtual line Fic Arc HW1, HW2 Oscillation direction J1, J2 Bending direction P1 Rotation Reference position P2 Rotation position Q1 Forward rotation reference position Q2 Reverse rotation rocking position Rf Retraction position Rp of cam arm portion Retraction positions S1, S2, S3, S4, S5 of 24-hour display hands

Claims (11)

A reference gear that is rotated synchronously with a car in a normal wheel train,
An operating cam that is rotated synchronously with the reference gear, and has a cam surface with a stepped portion in a shape in which the distance from the center gradually increases when it is rotated in the forward direction and returns from the largest diameter portion to the smallest diameter portion. And
A display unit that performs display according to the displacement of the cam follower that contacts the cam surface;
The swing intermediate gear structure comprising: a swing intermediate gear structure meshed with the reference gear; a swing gear meshed with the swing intermediate gear structure; and a swing lever that supports the swing intermediate gear structure and the swing gear. A rocking wheel mechanism capable of rocking around a structure, wherein when the reference gear is rotated in the forward direction, the first rocking position is adopted, and when the reference gear is rotated in the reverse direction, a second rocking mechanism is provided. With a moving position,
When the oscillating wheel mechanism takes the second oscillating position, the oscillating gear is engaged with the oscillating gear, and the cam follower is moved out of the rotation locus of the operating cam according to the reverse rotation of the reference gear. A retraction mechanism that is retracted and is disengaged from the rocking gear when the rocking wheel mechanism takes the first rocking position;
A retrograde display mechanism.   The maximum diameter portion of the operating cam extends in a bowl shape, and one side is defined by the extended portion of the cam surface on the minimum diameter portion side extending beyond the imaginary line connecting the maximum diameter portion and the rotation center. The retrograde mechanism according to claim 1, wherein a recess is formed.   The retrograde display mechanism according to claim 2, wherein the operating cam is configured to rotate integrally with the reference gear, and the reference gear is a 24-hour gear.   The retrograde display mechanism according to claim 2 or 3, wherein the cam follower comprises an arm portion elastically supported so as to be bent.   2. The retrograde display mechanism according to claim 1, wherein the operating cam is configured to rotate integrally with a day transmission wheel meshed with the reference gear, and the day transmission wheel is rapidly controlled by a day jumper.   6. The retrograde display mechanism according to claim 5, wherein the oscillating intermediate gear structure of the oscillating wheel mechanism is engaged with the reference gear via another intermediate gear, and the reference gear is a 24-hour gear.   The retrograde display mechanism according to any one of claims 1 to 6, wherein the oscillating wheel mechanism is configured to increase speed and retract the cam follower.   The swing intermediate gear structure includes a first swing intermediate gear meshed with the reference gear, a slip engagement with the first swing intermediate gear coaxially with the first swing intermediate gear and via the shaft. The retrograde mechanism according to any one of claims 1 to 7, wherein the second oscillating intermediate gear meshes with the oscillating gear.   A movement comprising the retrograde display mechanism according to any one of claims 1 to 8.   An analog timepiece comprising the retrograde display mechanism according to any one of claims 1 to 8. A reference gear that is rotated synchronously with the wheel of a normal wheel train, and an operating cam that is rotated synchronously with the reference gear, and the distance from the center gradually increases from the maximum diameter portion when rotated in the forward direction. A cam surface having a stepped portion at a position returning to the minimum diameter portion, a display portion for displaying according to the displacement of a cam follower contacting the cam surface, and a swinging intermediate gear meshed with the reference gear A swinging gear that meshes with the swinging intermediate gear structure, a swinging lever that supports the swinging intermediate gear structure and the swinging gear, and that can swing around the swinging intermediate gear structure. An oscillating vehicle mechanism that takes a first oscillating position when the reference gear is rotated in the forward direction and takes a second oscillating position when rotated in the reverse direction; A power switching method in a retrograde display mechanism comprising:
When the oscillating wheel mechanism takes the second oscillating position, the oscillating gear is engaged with the oscillating gear, and the cam follower is moved out of the rotation locus of the operating cam according to the reverse rotation of the reference gear. A power switching method comprising a step of retracting and a step of releasing the meshing with the rocking gear when the rocking wheel mechanism takes the first rocking position.

Images