JP2013142631A - Hand-setting mechanism and analogue clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand-setting mechanism for reliably regulating rotation of a minute gear while suppressing complexion of a structure to the minimum, and an analogue clock provided with the same.SOLUTION: A hand-setting mechanism 1 for an analog clock 2 has: a bottom board 10 in which a peripheral wall part 12 on a rear cover 18 side of second shaft insertion holes 11 protrudes more than a main surface part 10a on the rear cover 18 side in an area where a third shaft 33 exists; and an operation lever 4 which is provided with a third shaft engagement part 90 for guiding and holding a third shaft 43 of a third gear 43 and is rotated along the main surface part 10a of the bottom board 10 so as to remove a third gear 40 from a second gear 30 in accordance with drawing of a winding shaft 3 in the A2 direction when setting hands. The peripheral wall part 12 having the bottom board 10 protruded is provided with a notch part 13 for exposing the second shaft 33 to one side. The operation lever 4 has a second shaft engagement part 80 for pressing the second shaft 33 exposed from the notch part 13 of the peripheral wall part 12 of the bottom board 10 when removing the third gear 40 from the second gear 30 by the third shaft engagement part 90 in accordance with the drawing of the winding shaft 3 in the A2 direction when setting the hands.

Description

  The present invention relates to a hand alignment mechanism and an analog timepiece having the mechanism.

  In an analog timepiece, that is, a pointer-type timepiece equipped with a hand (time indicator hand), both hands are placed between the minute wheel and the second wheel in order to adjust the time (time correction) to adjust the hour / minute hand position to the hour / minute position to be displayed. By disconnecting the car that connects the car (No. 3 car) and the minute wheel (Patent Documents 1 and 2, etc.) and by regulating the car that has been disconnected (No. 3 car), It is known that the second hand is prevented from swinging due to an external impact in the meantime (Patent Documents 3 and 4, etc.).

  However, in these watches, when the hand is aligned and the third wheel and the minute wheel are meshed again, depending on the relative positional relationship between the second gear teeth and the third pinion teeth, the minute wheel is one tooth. There is a possibility that the minute hand may deviate from the position where the hands are aligned with each other.

  On the other hand, there has also been proposed a watch that avoids turning of the minute wheel when the third wheel and the minute wheel are engaged again after the completion of the hand alignment.

  In the proposed hand alignment mechanism 102 of the timepiece 101, as shown in FIG. 6, a hand-operated wheel train 107 supported by a base plate 111 and a train wheel bridge 112 and driven by a motor 106 fed by a battery 105, An actuating lever or regulating lever (regulating lever) 130 that rotates in the B1 and B2 directions around the central axis B in accordance with the insertion and withdrawal of the true 103 in the A1 and A2 directions is provided. The operating lever 130 abuts on the spring receiver 121 at the tip of the spring portion 131 and can be engaged with the tip portion 104 of the winding stem 103 by the engaged portion 132. The operating lever 130 also holds a bearing (not shown) on one end side of the true (third counter true) 141 of the third wheel & pinion 140 by the lever main body 133, and a thin elastic arm branched from the intermediate portion of the main body 133 A pressing engagement portion 135 facing the outer periphery of the second gear 151 of the center wheel & pinion 150 is provided at the tip of the portion 134.

  When taking the normal hand movement position where the winding stem 103 is pushed in the A1 direction, that is, the winding stem zero stage position PA1, as shown in FIG. 7 in addition to FIG. A normal hand movement allowable position QA1 that is engaged with the tip 104 of the true 103 and rotated in the B1 direction is adopted. In the normal needle movement allowable position QA1, the third pinion 142 that is rotatably supported by the bearing portion of the operating lever main body 133 at the tenon portion of the third true stem 141 is engaged with the second gear 151, and the third gear 143 is The second wheel 160 is engaged with the kana (fourth kana) 161 of the fourth wheel 160 and the rotation of the second wheel (fourth wheel) 160 is transmitted to the second wheel 150 via the third wheel 140. Note that, at the normal needle movement allowable position QA 1 of the operating lever 130, the pressing engagement portion 135 at the tip of the elastic arm portion 134 is located away from the outer peripheral edge of the second gear 151.

  On the other hand, in the timepiece 101, when the winding stem 103 takes the first-step position PA2 of the winding stem 103 pulled out in the A2 direction, the leading end 104 of the winding stem 103 escapes in the A2 direction as shown in FIG. Since the pressing force to the engaging portion 132 is eliminated, the needle alignment position QA2 is adopted in which the operating lever 130 is rotated in the B2 direction under the action of the spring force of the spring portion 131. In this needle alignment position QA2, the third pinion 142 that is rotatably supported by the operating lever main body 133 at the third counter true 141 is disengaged from the second gear 151, so the second wheel (minute wheel) 150 and the second wheel (fourth wheel) The transmission of rotation with the wheel 160) is cut off.

  In the hand setting mechanism 102 of the timepiece 101, at the first setting position of the winding stem 103 or the needle setting position PA2 of the winding stem 103, that is, the needle setting position QA2 of the operating lever 130, the winding stem 103 is rotated in the E1 and E2 directions. The hour wheel 180 is rotated via a pinion wheel and a small iron wheel (not shown), and the hour wheel (cylinder wheel) 170 and the minute wheel (second wheel) 150 are rotated according to the rotation of the minute wheel 180. Thus, the hour hand 175 and the minute hand 155 are set at predetermined positions.

  Note that at the first winding center position or the needle alignment positions PA 2 and QA 2, the pressing engagement portion 135 at the tip of the elastic arm portion 134 is pressed against the outer peripheral edge of the second gear 151 and engaged with the second gear 151. . More specifically, the pressing engagement portion 135 of the operating lever 130 has at least one tooth of the second gear 151 composed of a large number of teeth 152 by a spring force FA accompanying the rotation angle of the operating lever 130 and the deformation of the elastic arm portion 134. Pressed against the tip of 152.

  That is, in the timepiece 101, when the hands are aligned, the pressing engagement portion 135 at the tip of the elastic arm portion 134 is pressed against the outer peripheral edge of the second gear 151. In fact, the pressing engagement portion 135 is actually the second gear. The contact with the second gear 151 is not stable only by abutting against a single tooth 152 among the multiple teeth 152 constituting the 151, and the two adjacent teeth 152, 152 constituting the second gear 151 are not stable. Since stable engagement is established only after contact with both the tips, there is a possibility that the timing of regulation of the center wheel & pinion 150 by the press engagement portion 135 may be delayed or shifted.

  Further, in the timepiece 101, the pressing engagement portion 135 at the tip of the elastic arm portion 134 is pressed against the outer peripheral edge of the second gear 151 at the time of hand alignment, and the second gear 151 needs to be rotated at the time of hand alignment. Therefore, the pressing force FA of the pressing engagement portion 135 by the elastic arm portion 134 needs to be set small so as not to hinder needle alignment, and the thin second gear 151 is not deformed for the diameter. In addition, the pressing force FA needs to be set sufficiently small so as not to damage the teeth 152 of the center wheel & pinion 151.

  Furthermore, in the hand alignment mechanism 102 of the timepiece 101, for example, as can be seen from FIG. 8B, the pressing engagement portion 135 of the operating lever 130 is a surface on which the main body portion 133 and the spring portion 134 of the operating lever 130 are located. Since it is pressed against the outer periphery of the tooth of the second gear 151 at the rising portion that rises from (the thickness direction portion of the watch 101 having the surface portion 111a facing the train wheel bridge 112 side of the main plate 111), the pressing force is It is necessary to control the spring force of the actuating lever 130 so that there is a possibility that it will be in an oblique direction with respect to the extending surface of the number gear 151 and that the second gear 151 and other components of the second wheel & pinion 150 are not deformed. is there. In addition, since it is necessary for the operating lever 130 to include a bent portion such as the rising portion 135, it is difficult to avoid the complicated shape of the component, and it is possible to reliably avoid interference with other components. It is necessary to manage the dimensions, which may increase the cost.

JP 2001-349966 A JP-A-4-40396 JP 2006-234440 A JP 2006-214927 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 needle alignment mechanism capable of reliably regulating the rotation of the minute wheel while minimizing the complexity of the structure and the mechanism. It is to provide an analog watch equipped with.

  In the needle alignment mechanism of the present invention, in order to achieve the above-mentioned object, the ground plate protruding from the main surface portion on the back cover side in the region where the peripheral wall portion on the back cover side is the third true in the second true insertion hole, and A third true engagement portion for guiding and holding the third true of the third wheel is provided, and along the main surface portion of the main plate to remove the third wheel from the second wheel in accordance with the pulling of the winding stem when the needle is aligned. A needle alignment mechanism having a pivoting operating lever, wherein the projecting peripheral wall portion of the base plate has a cutout portion that exposes the second true on one side, and the operating lever is When the third wheel is removed from the second wheel at the third true engagement portion in accordance with the pull-out, the second true engagement portion that holds the second true exposed from the notch of the peripheral wall portion of the base plate is provided.

  According to the needle alignment mechanism of the present invention, the above-mentioned peripheral wall portion from which the base plate protrudes has a cutout portion that exposes the second true on one side, and the operating lever is adapted to the third true in accordance with the withdrawal of the winding stem at the time of needle alignment. `` There is a second true engagement part that holds the second true exposed from the notch of the peripheral wall part of the base plate when the third wheel is removed from the second wheel at the engagement part '' Since the joint is pressed against the second cylindrical surface, the second stem can be securely pressed, and the rotation of the minute wheel is reliably controlled while minimizing the complexity of the structure. obtain. In other words, the second true engagement portion holds down the toothed portion like the second gear, not the uneven portion on the outer periphery, but the cylindrical peripheral surface. You can hold it down. Further, since the second true engaging portion is not a thin disc like the second gear, it can be pressed with a relatively strong force, so that the rotation of the minute wheel can be reliably controlled. Furthermore, the second true engagement portion is formed by pressing the second true portion exposed from the cutout portion where the second true engagement portion exposes the second true on one side. Since it can be configured in a substantially flat plate shape along the back cover side main surface of the main plate in the same manner as the watch stem engaging portion, the structure of the operating lever can be simplified.

  Here, the portion of the second true that should be exposed from the notch is a toothed portion that functions as a second gear portion that meshes with the third pinion portion and a second pinion portion that meshes with the minute gear portion. As long as there is no portion, the surface may be provided with a relatively smooth surface, or may be roughened so as to be easily frictionally engaged, or the rough surface shape may be realized by relatively large unevenness. The same applies to the second true engagement portion of the operating lever.

  In the needle alignment mechanism of the present invention, typically, the operating lever is flat so that the third true engagement portion and the second true engagement portion are located on substantially the same plane.

  In that case, the structure is simplified and it is easy to reliably regulate the rotation of the minute wheel.

  In the needle alignment mechanism of the present invention, typically, the operating lever is engaged with the winding stem when receiving the force from the winding stem when the winding stem is in the normal hand movement position where the winding stem is pushed in; And a reaction force generating spring portion that is locked to the spring receiver so as to constantly apply to the operating lever a torque that is opposite to the torque caused by the force received by the input side leaf spring portion.

  In that case, since it is not necessary to provide a spring in the restricting portion of the center wheel & pinion, the structure is simplified and it is easy to reliably restrict the rotation of the minute wheel.

  In the needle alignment mechanism of the present invention, the second true engagement portion is typically supported by an arm portion that is sufficiently rigid to restrict the second true rotation for needle alignment.

  In that case, since it is not necessary to provide a weak spring at the restriction portion of the center wheel & pinion, the structure is simplified and the rotation of the minute wheel is easily restricted.

  In the needle alignment mechanism of the present invention, typically, the rigid arm portion is an arm portion bent in an L shape.

  In that case, since it is not necessary to provide a spring in the restricting portion of the center wheel & pinion, the structure is simplified and it is easy to reliably restrict the rotation of the minute wheel.

  In the needle alignment mechanism of the present invention, typically, when the engagement between the second true engagement portion and the second true engagement is not generated, the third pinion and the second gear are at least partially engaged. Are combined.

  In this case, it is possible to avoid the minute hand from swinging when the third pinion and the second gear are engaged after the needle alignment.

  In the needle aligning mechanism of the present invention, typically, when the winding stem is pulled out from the needle aligning position to the normal hand moving position, the third true kana is released before the second true pressing by the second true engaging portion is released. Is configured to regulate the free rotation of the second gear.

  In this case, it is possible to avoid the minute hand from swinging when the third pinion and the second gear are engaged after the needle alignment.

  In the needle alignment mechanism of the present invention, typically, the third true engagement portion is a bearing that rotatably supports the third true end.

  In that case, the actuating lever can securely support the third true end in a freely rotatable manner.

  In the needle alignment mechanism of the present invention, typically, the operation lever is configured to function as a reset terminal electrically connected to one terminal of the battery.

  In that case, an operating lever extending over a wide range along the main plate can mechanically and electrically contribute to the operation of the timepiece.

  The analog timepiece of the present invention has the above-described hand alignment mechanism in order to achieve the above object.

FIG. 3 is an explanatory plan view showing a part of an analog timepiece equipped with a hand setting mechanism according to a preferred embodiment of the present invention when the winding stem is in a normal hand movement position (winding stem zero stage position) where the winding stem is pushed in. FIG. 2 is an enlarged view of a part of the analog timepiece of FIG. 1, in which (a) is an explanatory plan view similar to FIG. 1, and (b) is an end surface explanatory view of a cross section of (a). 1 is an explanatory plan view similar to FIG. 1 showing a part of an analog timepiece equipped with a hand setting mechanism according to a preferred embodiment of the present invention when the winding stem is in the hand setting position (winding stem first position). . 3 is an enlarged view of a part of the analog timepiece of FIG. 3, (a) is an explanatory plan view similar to (a) of FIG. 2, and (b) is a cross-sectional portion similar to (b) of FIG. 2. End surface explanatory drawing. The relative relationship between the operation / release timing of the second true rotation restriction and the operation / release timing of the engagement between the second gear portion and the third pinion portion is shown. The true rotation is strongly regulated (the second true rotation regulation is strongly activated), and the engagement between the second gear part and the third pinion part is released (the second gear part and the third pinion part) FIG. 4B is a diagram illustrating the state of disengagement. FIG. 4B is a diagram illustrating a relationship between the second gear portion and the third pinion portion when the second true rotation is weakly regulated (second true rotation regulation is weakly activated). An explanatory view showing a state close to engagement (disengagement between the second gear portion and the third pinion portion), but the second true rotation is extremely weakly restricted. (The 2nd true rotation restriction operates very weakly), and the 2nd gear part and the 3rd pinion part are lightly engaged (the operation with weak engagement between the 2nd gear part and the 3rd pinion part) (D) is the second true rotation restriction is released (second true rotation restriction is released), and the second gear portion and the third pinion portion are strongly engaged ( Explanatory drawing which showed the operation | movement with a strong engagement with a 2nd gear part and a 3rd pinion part. A part of the conventional analog timepiece provided with the conventional hand alignment mechanism is shown, (a) is a plane explanatory view, (b) is a cross-sectional explanatory view. 6 is an enlarged view of a part of a conventional analog timepiece equipped with the conventional hand alignment mechanism of FIG. 6 when the winding stem is in a normal hand movement position (winding stem zero stage position) in which the winding stem is pushed in (a ) Is an explanatory plan view, and FIG. This is an enlarged view of a part of a conventional analog watch equipped with a conventional needle alignment mechanism when the winding stem is at the hand alignment position where the winding stem is pulled out (winding stem first stage position). FIG. 4B is a cross-sectional explanatory view.

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

  FIG. 1 and FIG. 2 (a) and FIG. 2 (b) show a part of an analog timepiece 2 provided with a hand setting mechanism 1 according to a preferred embodiment of the present invention in a normal hand movement state S1. In the normal hand movement state S1, a position where the winding stem 3 is pushed in the A1 direction, that is, a winding stem zero stage position P1 is taken. Note that the case where the hand setting mechanism 1 of the analog timepiece 2 is in the hand setting state S2 and the winding stem 3 is pulled out in the A2 direction, that is, the winding stem first stage position P2, is shown in FIGS. It is shown in (a) and (b).

  In addition to FIG. 1, the analog timepiece 2 is shown in FIG. 2A in which a part thereof is enlarged, and in FIG. 2B showing the end face of the cross section thereof, as shown in FIG. A supported wheel train 6 is provided. A wheel train 6 driven by a clock motor 7 fed by a battery 5 includes an hour wheel (cylinder wheel) 20, a minute wheel (second wheel) 30, a second wheel (fourth wheel) 23, A minute wheel 27 that connects the hour wheel 20 and the minute wheel 30, a third wheel 40 that connects the minute wheel 30 and the second wheel 23, and a gear that connects the rotor gear portion 7 a of the clock motor 7 and the second wheel 23. And a fifth wheel & pinion 19 provided with a portion 19a and a kana portion 19b.

  The generally thick plate-like base plate 10 includes a through-hole portion 11 as a second true insertion hole in the center, and the substantially cylindrical shape of the central hole portion 11 in the planar surface 10a on the back cover 18 side as the main surface portion of the base plate 10. The shape surrounding wall part 12 protrudes to the back cover 18 side. The cylindrical convex portion or cylindrical peripheral wall portion 12 has a height of about L1, and has a sector-shaped notch 13 in a part of the circumferential direction. When viewed in the radial direction of the cylindrical peripheral wall 12, the notch 13 is composed of a space V having a sectoral cross section in which the entire region from the inner peripheral surface 12 a to the outer peripheral surface 12 b is cut out and having a height L 1. .

  The hour wheel 20 rotatable around the central axis C includes a cylindrical gear portion 21 located on the dial 8 side of the main plate 10 and a large-diameter cylindrical portion 22 having an hour hand 20a attached to the tip.

  A minute wheel 30 that is rotatable around the central axis C includes a second gear portion 31 that is located on the back cover 18 side of the main plate 10, a second pinion portion 32 that is further located on the back cover 18 side, and a second gear. It includes a medium diameter cylindrical portion 33 as a second true that is integral with the portion 31 and the second pinion portion 32 and rotatably passes through the central hole portion 11 of the main plate 10 and protrudes toward the dial 8 side. A minute hand 30 a is attached to the protruding end of the medium diameter cylindrical portion 33. A longitudinal direction portion 34 that penetrates the cylindrical peripheral wall portion 12 of the main plate 10 in the medium diameter cylindrical portion 33 is exposed in a circumferential region 35 that faces the cutout portion 13 of the cylindrical peripheral wall portion 12. The portion or the longitudinal direction portion 34 that becomes the exposed region 35 is a tooth portion that functions as a second gear portion 31 that meshes with the third pinion portion 42 and a second pinion portion 32 that meshes with the minute wheel portion 28. As long as there is no portion, the surface may be roughened so as to be easily frictionally engaged, or the rough surface shape may be realized by relatively large irregularities. The exposed portion 35 may be a relatively smooth surface without being roughened. In any case, the cross section of the portion 34 is actually circular.

  The second wheel 23 rotatable around the central axis C includes a fourth gear portion 24 located at a part adjacent to the train wheel bridge 17, a fourth pinion portion 25 located on the base plate 10 side, and a train wheel at one end. A fourth stem 26 that is rotatably supported by the receiver 17 and that is integral with the fourth gear portion 24 and the pinion portion 25 and penetrates the cylindrical second stem 33 rotatably and protrudes toward the dial 8 side. . A second hand 23 a is attached to the projecting end of the fourth stem 26.

  The minute wheel 27 is meshed with the second pinion portion 32 at the minute gear portion 28 and meshed with the cylindrical gear portion 21 at the minute pinion portion (not shown).

  On the other hand, the third wheel & pinion 40 is meshed with the fourth pinion portion 25 by the third gear portion 41 and meshed with the second gear portion 31 by the third pinion portion 42 so as to be able to be engaged and disengaged. The third counter gear 43 integral with the third gear portion 41 and the third pinion portion 42 is supported by a movable bearing portion 90 at the end portion 44 on the dial plate 8 side. An end portion of the third stem 43 on the back cover 18 side is rotatably supported by a bearing portion 18 a of the train wheel bridge 18.

  The needle alignment mechanism 1 includes a regulation lever or a regulation lever 4 as an operation lever that is actuated by the winding stem 3. The regulating lever 4 is made of a metal plate that is electrically connected to one terminal of the battery 5 and also functions as a reset lever.

  The restriction lever 4 includes a substantially rigid restriction lever main body 50 supported at one end 51 so as to be rotatable around the central axis B in the B1 and B2 directions, and a second end 52 of the restriction lever main body 50 to the second end 52. An actuating lever spring portion or restricting lever spring portion 60 as a reaction force generating spring portion giving a directional elastic biasing force, an input side spring portion 70 giving a B1 direction elastic biasing force to the restricting lever main body portion 50, and a restricting force A second wheel rotation restricting portion 80 that is integral with the lever main body portion 50 and extends from one portion 53 in the middle of the restricting lever main body portion 50 so as to give a rotation restricting force to the second wheel 30. And a third true tenon receiving portion 90 that forms a bearing portion as a third true engagement portion that rotatably supports the end portion or tenon portion 44 of the third true truth 42 at another intermediate portion 54. The second wheel rotation restricting portion 80 and the third true tenon receiving portion 90 are located on the substantially opposite side in the diameter direction with respect to the central axis C. If there is a possibility that the tenon portion 44 of the third true stem 43 protrudes from the tenon receiving portion 90 to the dial plate 8 side at the portion 54 of the main body portion 50 of the regulating lever 4, (b) in FIG. As shown in FIG. 4B, a recess 10 b that escapes from the surface 10 a of the ground plate 10 is formed in a region of the ground plate 10 that may face the tenon receiving portion 90.

  The spring portion 60 of the restriction lever 4 extends in a U shape from the base end portion 61 connected to the end portion 52 of the restriction lever main body portion 50 to the tip engagement portion 62 that engages with the spring receiver 14 of the base plate 10. And a B2 direction elastic biasing force from the spring receiver 14 is exerted on the end 52 of the regulating lever main body 50.

  The input-side spring portion 70 of the regulating lever 4 is a rigid covered member that engages at the distal end 73 from the proximal end 71 connected to the end 51 of the regulating lever main body 4 to the side edge 3b of the distal end 3a of the winding stem 3. A linear spring main body 76 extending substantially linearly to the base end portion 75 of the engaging portion 74 is provided, and when the winding stem 3 is in the winding stem zero stage position P1 pushed in the A2 direction, the winding stem 3 Engage with the side edge 3b of the tip 3a at the tip 73 of the engaged portion 74 and receive a B1 direction biasing force (FIG. 1 and FIG. 2 (a)), and the winding stem 3 is pulled out in the A1 direction. When the winding stem first stage position P2 is taken, the winding stem 3 is separated from the engaged portion 74, so that the B1-direction turning power received by the engaged portion 74 from the winding stem 3 is released ((3 in FIG. 3 and FIG. 4). a)).

  Of the restriction lever 4, the part other than the engaged part 74 of the input side spring part 70, that is, the restriction lever main body part 50, the linear spring main body part 76, and the restriction lever spring part 60 are as a whole. It is the form of the flat plate extended along the 18th side plane 10a. However, if desired, it may be partially non-flat.

  The second wheel rotation restricting portion 80 as the second true engaging portion of the restricting lever 4 includes a base side arm portion 81 that extends substantially linearly from the portion 53 of the restricting lever main body portion 50 and a distal end portion of the base side arm portion 81. A distal end side arm portion 83 extending in a direction substantially perpendicular to the (exposed) portion 35 of the second true 33 exposed from the cylindrical peripheral wall portion of the base plate 10 or the cutout portion 13 of the cylindrical convex portion 12; Have In this example, the distal arm 83 is wider than the base arm 81 and is more rigid. In this example, the angle formed by the base side arm portion 81 and the distal end side arm portion 83 is 90 degrees or less. Although the spring force of the base side arm portion 81 is much larger than the spring force of the conventional restriction portion (arm portion 134 in FIGS. 6 to 8) that presses the outer peripheral tooth portion of the second gear, the restriction lever spring portion Less than 60 spring force.

  When the normal hand movement position (winding stem zero stage position) P1 in which the winding stem 3 is pushed in the A1 direction is taken, the regulation is performed under the action of the spring force of the input side spring portion 70 having a stronger spring force than the regulating lever spring portion 60. Since the lever 4 is set to the normal hand movement position Q1 rotated in the B1 direction, the center wheel & pinion rotation restricting portion 80 is also rotated in the B1 direction, and the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 has a cylindrical shape. A separation position Q11 is taken away from the exposed portion 35 of the cylindrical portion 34 of the second true 33 within the cutout portion 13 of the convex portion 12 (FIGS. 1 and 2 (a) and (b)).

  On the other hand, when the winding stem 3 takes the needle alignment position (winding stem first stage position) P2 drawn in the A2 direction, the regulating lever 4 is rotated in the B2 direction under the action of the spring force of the regulating lever spring portion 60. Since the needle alignment position Q2 is set, the center wheel & pinion rotation restricting portion 80 is also rotated in the B2 direction, and the end face 85 of the distal end portion 84 of the distal end side arm portion 83 is second in the cutout portion 13 of the cylindrical convex portion 12. The second true regulation position Q21 pressed against the exposed portion 35 of the tubular portion 34 of the watch stem 33 is taken (FIGS. 3 and 4 (a) and (b)). Strictly speaking, the end face 85 of the distal end portion 84 of the distal end side arm portion 83 of the second wheel rotation restricting portion 80 functions as a second true engagement portion.

  As for the third true tenon receiving portion 90 of the operating lever 4, the winding stem 3 takes the normal hand movement position (winding true zero stage position) P1, and the regulation lever 4 is rotated in the B1 direction. When Q1 is adopted, the third pinion portion 42 of the third wheel & pinion 40 in which the end portion 44 of the third third wheel 43 is supported by the bearing portion, that is, the third third tenon receiving portion 90 in the portion 54 of the main body portion 50 of the regulating lever 4. Adopts the normal hand meshing position Q12 meshed with the second gear 31 (FIGS. 1 and 2 (a) and (b)). Here, the portion where the third pinion portion 42 meshes with the second gear 31 is generally in the diametrical direction with respect to the distal end surface 85 of the distal end side arm portion 83 of the second wheel rotation restricting portion 80 that functions as a second true engagement portion. It is the site | part of the other side.

  On the other hand, when taking the needle alignment position (winding stem first stage position) P2 from which the winding stem 3 is pulled out and taking the needle alignment position Q2 where the regulating lever 4 is rotated in the B2 direction, the third pinion part of the third wheel & pinion 40 is used. 42 takes the meshing release needle alignment position Q22 where the meshing with the second gear 31 is released away from the second gear 31 (FIGS. 3 and 4 (a) and (b)).

  Regarding the hand setting operation of the analog timepiece 2 of the preferred embodiment of the present invention having the hand setting mechanism 1 of the preferred embodiment of the present invention constructed as described above, refer to FIG. 5 in addition to FIGS. This will be described in more detail.

  When the normal hand movement position (winding stem zero stage position) P1 in which the winding stem 3 is pushed in the A1 direction is taken, the regulation is performed under the action of the spring force of the input side spring portion 70 having a stronger spring force than the regulating lever spring portion 60. Since the lever 4 is set to the normal hand movement position Q1 rotated in the B1 direction, the third number 43 in which the end 44 of the third true stem 43 is supported by the bearing 90 in the portion 54 of the main body 50 of the regulating lever 4 is set. The kana portion 42 is in the normal hand meshing position Q12 where the second pinion 31 is engaged deeply, and the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 of the second wheel rotation restricting portion 80 is the notch portion of the cylindrical convex portion 12. 13, a separation position Q11 is taken away from the exposed portion 35 of the cylindrical portion 34 of the second most true 33 (FIGS. 1, 2A and 2B, and FIG. 5D).

  On the other hand, when the winding stem 3 takes the needle alignment position (winding stem first stage position) P2 drawn in the A2 direction, the regulating lever 4 is rotated in the B2 direction under the action of the spring force of the regulating lever spring portion 60. Since the needle alignment position Q2 is set, the third pinion portion 42 in which the end portion 44 of the third true stem 43 is supported by the bearing portion 90 in the portion 54 of the main body portion 50 of the regulating lever 4 is moved from the second gear 31 to B2. The engagement release needle alignment position Q22 where the engagement with the second gear 31 is released away in the direction is taken. At this time, the center wheel rotation restricting portion 80 is also rotated in the B2 direction, and the end face 85 of the tip end portion 84 of the tip end side arm portion 83 is the cylindrical portion of the second true 33 within the cutout portion 13 of the cylindrical convex portion 12. The second true restriction position Q21 is pressed against the exposed portion 35 of 34 with a relatively strong force F (FIGS. 3, 4A and 5B, and FIG. 5A).

  In the hand setting mechanism 1 of the timepiece 2, E 1 around the central axis E of the winding stem 3 at the first position of the winding stem for the winding stem 3 or the needle matching position Q 2 for the regulating lever 4. The minute wheel 27 is rotated via a pinion wheel and small iron wheel (not shown) according to the rotation in the E2 direction, and the hour wheel (cylinder wheel) 20 and the minute wheel (two) according to the rotation of the minute wheel 27 according to the rotation. ) 30 is rotated, and the hour hand 20a and the minute hand 30a are set at predetermined positions.

  More specifically, in this state S2, since the main body portion 50 of the restriction lever 4 is maximally biased in the B2 direction under the action of the restriction lever spring 60, the second wheel rotation restriction portion 80 is elastic. If there is no deformation (actually elastic deformation of the proximal end side arm portion 81), the distal end side arm portion 83 is in relation to the second true line 33 as indicated by an imaginary line 83i in FIG. When the deeply penetrating position is taken, the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 is exposed to the second true 33 in a state where the proximal end arm portion 81 is slightly elastically deformed by the reaction F of the pressing force F. It is strongly pressed against the cylindrical peripheral surface 36 of the portion 35. Here, since the peripheral surface 36 of the exposed portion 35 of the second truer 33 is a part of the second truer 33 integral with the second gear 31, the end face 85 of the distal end portion 84 of the distal end side arm portion 83 is once. When pressed against the cylindrical peripheral surface 36 of the exposed portion 35 of the second gear 33, unlike when pressed against the outer peripheral tooth portion of the second gear in the form of a spur gear as shown in FIG. The rotation of the second stem 33 can be reliably controlled. In addition, the end face 85 of the distal end portion 84 of the distal end side arm portion 83 is pressed against the outer peripheral portion of the cylindrical or rod-like second truer 33 unlike the outer peripheral edge of the thin and large-diameter gear portion such as the second gear portion. Therefore, since the center wheel & pinion 30 can be regulated with a relatively large pressing force F, rotation regulation can be performed reliably. Furthermore, in the hand alignment mechanism 1 of the timepiece 2, the entire main body 50 of the restriction lever 4 is in the form of a plate-like body that is positioned on the same plane including the arm portions 81 and 83 of the second wheel rotation restriction portion 80. Therefore, unlike the case where the second true regulating portion has a shape that rises in the thickness direction of the watch as shown in FIG. 8, not only an extra space for avoiding interference of a bent portion or the like is required, but also the regulation. Since the force F of the lever 4 can be reliably applied to the second stem 33 along the plane, the rotation restriction can be reliably performed.

  The process from the normal hand movement state S1 in FIG. 5A to the needle alignment state S2 in FIG. 5D is as follows.

  That is, the normal hand movement state S1 (FIG. 1, (a) and (b) of FIG. 1, FIG. 2, and FIG. As the winding stem 3 is pulled out in the A2 direction from d)), the engagement between the side edge 3b of the distal end portion 3a of the winding stem 3 and the input side spring portion 70 of the regulating lever 4 becomes shallow, and the main body of the regulating lever 4 Since the portion 50 is gradually rotated in the B2 direction, the second wheel rotation restricting portion 80 connected to the portion 53 of the main body portion 50 is also gradually rotated in the B2 direction so that the second wheel rotation restricting portion 80 The end surface 85 of the distal end portion 84 of the distal end side arm portion 83 gradually approaches the exposed portion 35 of the third truth 33, and finally the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 becomes the exposed portion 35 of the third truth 33. (FIG. 5C). On the other hand, as the main body portion 50 of the regulating lever 4 rotates in the B2 direction, the third pinion portion 42 of the third true stem 43 supported by the bearing portion 90 of the portion 54 of the main body portion 50 is also gradually rotated in the B2 direction. Thus, although the engagement between the third pinion portion 42 and the second gear portion 31 gradually becomes shallower, as shown in FIG. 5C, the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 has three ends. In the state S3 in contact with the exposed portion 35 of the watch stem 33, the engagement or meshing between the teeth 46 of the third pinion portion 42 and the teeth 37 of the second gear portion 31 remains slightly. Accordingly, the rotation of the center wheel & pinion 30 is actually restricted by the third pinion portion 42.

  When the winding stem 3 is further pulled out in the A2 direction from the state S3 shown in FIG. 5C, the engagement between the side edge 3b of the tip 3a of the winding stem 3 and the input side spring portion 70 of the regulating lever 4 is achieved. Since the joint becomes shallower and the main body portion 50 of the regulating lever 4 is further rotated in the B2 direction, the third pinion portion 42 of the third stem 43 supported by the bearing portion 90 of the portion 54 of the main body portion 50 is also provided. By gradually turning in the B2 direction, the meshing of the teeth 46 of the third pinion portion 42 and the teeth 37 of the second gear portion 31 gradually becomes shallow, and finally, as shown in FIG. Thus, the state (the state where the apexes of the teeth 46 and 37 abut) that the engagement between the teeth 46 and 37 is practically lost is reached S4. Between the state S3 shown in (c) of FIG. 5 and the state S4 shown in (b) of FIG. 5, the main body 50 of the restricting lever 4 is slightly rotated in the B2 direction, and the second wheel rotation restricting portion. If 80 is a rigid body, this rotation causes the distal arm 83 of the second wheel rotation restricting portion 80 to reach the position indicated by the imaginary line 83i in FIG. As a result, the end surface 85 of the distal end portion 84 of the distal end side arm portion 83 is kept in contact with the peripheral surface 36 of the exposed portion 35 of the third stem 33. The distal end 84 of the distal arm 83 is pressed against the peripheral surface 36 of the exposed portion 35 of the third stem 33 by the pressing force accompanying the elastic deformation of the proximal arm 81 generated here. Even if the restriction due to the meshing of the gear portions 42 and 31 is eliminated, the rotation of the second stem 33 can be restricted as it is.

  Thereafter, from the state S4 in FIG. 5B to the state S2 in FIG. 5A, there is no restriction by the meshing of the gear portions 42 and 31, and the end face 85 of the distal end portion 84 of the distal end side arm portion 83. However, the pressing force that is pressed against the peripheral surface 36 of the exposed portion 35 of the third counter true 33 increases.

  As described above, in the hand setting mechanism 1 of the analog timepiece 2, after the hand is set in the hand setting state S2 in FIG. 5A, the engagement proceeds as shown in FIG. The second wheel 30 is rotated by the second wheel rotation restricting portion 80 of the operating lever 4 until the unexpected free rotation of the car 30 is restricted by the third wheel itself (immediately before entering the normal hand movement state S1). Since it is regulated, the possibility that an unexpected swing of the minute hand may occur before normal hand movement is started after the needle alignment can be minimized.

A1, A2 direction B, C Center axis B1, B2 Rotating direction F Pushing direction force (and reaction)
P1 Normal hand movement position (winding true zero stage position)
P2 Needle alignment position (winding stem first position)
L1 Height Q1 Normal hand movement position Q11 Separation position Q12 Normal movement meshing position Q2 Needle alignment position Q21 Second true regulation position Q22 Engagement release needle alignment position Q23 Maximum turning bias position S1 of operating lever body S1 Normal needle movement state S2 Needle alignment state S3, S4 states V space 1 hand alignment mechanism 2 analog watch 3 winding stem 3a tip 3b side edge 4 regulating lever (actuating lever)
5 Battery 6 Train wheel train 7 Clock motor 7a Rotor gear 8 Dial 10 Base plate 10a Surface (main surface)
10b Recess 11 (Center) Hole (No. 2 true insertion hole)
12 (Cylindrical) peripheral wall (convex)
12a Inner peripheral surface part 12b Outer peripheral surface part 13 Notch part 14 Spring receiver 17 Train wheel receiver 18 Back cover 19 Fifth wheel 19a Fifth gear part 19b Fifth pinion part 20 Hour wheel (cylinder wheel)
20a hour hand 21 cylindrical gear part 22 large diameter cylindrical part 23 second wheel (fourth wheel)
23a Second hand 24 No. 4 gear part 25 No. 4 pinion part 26 No. 4 true 27 Day reverse wheel 28 Day reverse gear part 30 Minute wheel (second wheel)
30a Minute hand 31 Second gear part 32 Second pinion part 33 Medium-diameter cylindrical part (second true)
34 Longitudinal portion 35 (Exposed) Circumferential region (Exposed part)
36 Cylindrical peripheral surface 40 Third wheel 41 Third gear part 42 Third pinion part 43 Third counter pin 44 End part 50 Restriction lever body part (actuation lever body part)
51, 52 End 53, 54 Part 60 Restriction lever spring (reaction force generating spring)
70 Input-side spring portion 80 Second wheel rotation restricting portion 81 Base-side arm portion 82 Tip portion 83 Tip-side arm portion 83i Virtual displacement position (state) of the tip-side arm portion
84 Tip portion 85 End surface 90 Bearing portion (third true engagement portion)

Claims (10)

The ground plate in which the peripheral wall portion on the back cover side of the second true insertion hole of the second wheel protrudes from the main surface portion on the back cover side in the region where the third true of the third wheel is located, and guides and holds the third true An operating lever that is rotated along the main surface portion of the base plate to remove the third wheel from the second wheel in accordance with the pulling of the winding stem during needle alignment. A needle alignment mechanism comprising:
The peripheral wall portion from which the base plate protrudes has a notch portion that exposes the second true on one side,
When the operating lever removes the third wheel from the second wheel at the third true engagement portion in accordance with the pulling of the winding stem at the time of needle alignment, from the notch portion of the peripheral wall portion of the base plate A needle alignment mechanism having a second true engagement portion for pressing the exposed second true.   2. The needle alignment mechanism according to claim 1, wherein the actuating lever has a flat plate shape so that the third true engagement portion and the second true engagement portion are located on substantially the same plane.   The actuating lever includes an input side leaf spring portion that engages with the winding stem and receives a force from the winding stem when the winding stem is in a normal hand movement position, and a force received by the input side leaf spring portion. The needle alignment mechanism according to claim 1, further comprising: a reaction force generation spring portion that is locked to the spring receiver so as to constantly apply a torque in a direction opposite to the torque caused to the operating lever.   The needle alignment mechanism according to claim 3, wherein the second true engagement portion is supported by an arm portion that is sufficiently rigid to restrict rotation of the second trueness for needle alignment.   The needle alignment mechanism according to claim 4, wherein the rigid arm portion is an arm portion bent in an L shape.   The third pinion and the second gear are at least partially engaged with each other in a state in which the second true engagement portion and the second true engagement are not generated. The needle alignment mechanism according to any one of the items.   When the winding stem is pulled out from the needle alignment position to the normal hand movement position, the third pinion is free to rotate the second gear before the second true pressing by the second true engagement portion is released. The needle alignment mechanism according to claim 6, wherein the needle alignment mechanism is configured to be regulated.   The needle alignment mechanism according to any one of claims 1 to 7, wherein the third true engagement portion includes a bearing that rotatably supports the third true end.   The needle alignment mechanism according to any one of claims 1 to 8, wherein the operating lever is configured to function as a reset terminal electrically connected to one terminal of the battery.   An analog timepiece having the hand setting mechanism according to any one of claims 1 to 9.

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