JP7260446B2 - Transmission wheel, self-winding mechanism, watch movement and watch - Google Patents

Description

TECHNICAL FIELD The present invention relates to a switching transmission wheel, an automatic winding mechanism, a timepiece movement and a timepiece.

A mechanical watch equipped with an automatic winding mechanism is known as a mechanism for winding a mainspring. An automatic winding mechanism generally includes an oscillating weight that can rotate in two directions, and a switching transmission wheel for switching the bidirectional rotation of the oscillating weight to unidirectional rotation.

As this type of switching transmission wheel, various types have been known in the past.
The clutch wheel includes a rotating shaft portion rotatable around an axis, a ratchet wheel fixed to the rotating shaft portion, a gear combined to be relatively rotatable with respect to the rotating shaft portion, and a gear connected to the gear so as to swing. a switching pawl portion having an engaging pawl that engages with the ratchet wheel; and a spring portion that is integrally combined with the gear and presses the engaging pawl against the ratchet wheel side.

According to the clutch wheel configured in this way, when the gear rotates in one direction around the axis with respect to the rotating shaft, the switching pawl can swing so that the engagement of the engaging pawl is disengaged. It is As a result, only the gear can rotate in one direction without rotating the rotating shaft.
On the other hand, when the gear rotates in the other direction around the axis with respect to the rotating shaft portion, the engagement state between the engaging pawl and the ratchet wheel can be maintained, and the ratchet wheel and the rotating shaft rotate together with the gear. It is possible to rotate the part in the other direction.

In this way, by using the clutch wheel, even if the gear rotates in one direction and the other direction around the axis due to the rotation of the oscillating weight, it is possible to always rotate the rotating shaft in the same direction. It is As a result, the ratchet wheel can always be rotated in the same direction via the rotating shaft, and the mainspring can be wound up.

Japanese Utility Model Publication No. 46-9887

By the way, the above-described conventional clutch wheel has a so-called pushing pawl type configuration in which the engaging pawl pushes the ratchet wheel out.
Specifically, from a state in which the engaging pawl of the switching pawl and the engaging surface of the tooth portion of the ratchet wheel are engaged with each other, the gear rotates so that the engaging pawl pushes the engaging surface in the circumferential direction. By doing so, it is possible to rotate the switching pawl portion and the ratchet wheel together while maintaining the state of engagement between the engaging pawl and the engaging surface.

Regarding the above configuration, from the viewpoint that the ratchet wheel rotates first, when the ratchet wheel rotates in the direction of rotation from the engaging pawl toward the swing center of the switching pawl, the engaging pawl and the engaging surface The switching pawl and the ratchet wheel can be rotated together while maintaining the engaged state. That is, the switching pawl portion is formed to extend from the swing center toward the upstream side in the rotation direction of the ratchet wheel. The engaging pawl formed at the tip of the switching pawl engages with the engaging surface of the tooth portion of the ratchet wheel from the downstream side in the rotational direction of the ratchet wheel. Thereby, when the ratchet wheel rotates, the engaging pawl and the engaging surface can be engaged with each other so that a compressive force acts on the switching pawl portion, and the switching pawl portion and the ratchet wheel rotate together. can be made

As described above, the conventional clutch wheel is of the so-called pushing pawl type. The engagement (engagement) between the pawl and the engagement surface of the tooth portion of the ratchet wheel tends to be insufficient, and the engagement is easily disengaged. Therefore, it was difficult to form a long arm length.

By the way, when the switching pawl portion is freely rotated with respect to the ratchet wheel by releasing the engagement between the engaging pawl and the engaging surface, it is required to reduce the load on the ratchet wheel as much as possible. In order to meet such needs, for example, the arm length of the switching claw is formed long to secure a large distance from the swing center to the engaging claw (that is, the length of the arm that determines the rotational moment). can be considered. This is because it is possible to reduce the load on the ratchet wheel when the engaging pawl is pushed away against the spring portion.

However, as described above, since the conventional clutch wheel is of the so-called push pawl type, it is difficult to lengthen the arm length of the switching pawl portion itself. Therefore, it has been difficult to reduce the rotational load applied to the clutch wheel. As a result, the automatic winding mechanism using the clutch wheel has poor winding efficiency and there is room for improvement in the winding performance.

The present invention has been made in consideration of such circumstances, and its object is to provide a switching transmission wheel, an automatic winding mechanism, and a timepiece that can reduce the rotational load and improve the hoisting performance. It is to provide a movement and timepiece for

(1) A switching transmission wheel according to the present invention includes a rotating shaft portion having a switching transmission pinion that is rotatably disposed about a first axis and that transmits power to a train wheel to be transmitted; A switching wheel that is combined to be relatively rotatable and rotates around the first axis by power transmitted from a power source; a rotary plate that is integrally combined with the rotary shaft; and a switching pawl integrally combined with the rotating plate, wherein the switching wheel has an engaging surface directed to one side in the circumferential direction and the other side in the circumferential direction rotating around the first axis. a plurality of switching tooth portions having inclined surfaces facing the side, wherein the switching claw portion is a switching arm portion formed so as to extend from the second axis toward one side in the circumferential direction; an engaging portion formed at a distal end portion of the arm portion and releasably engaged with the engaging surface from one side in the circumferential direction; It is characterized in that the engaging portion is biased by a spring member so as to be pressed.

According to the switching transmission wheel according to the present invention, when the switching wheel rotates about the first axis toward one side in the circumferential direction due to the power transmitted from the power source, the plurality of switching teeth are formed accordingly. rotate in the same direction. At this time, since the engaging portion of the switching pawl is engaged with the engaging surface of the switching tooth portion from one side in the circumferential direction, the engaging state between the engaging surface and the engaging portion is maintained. can be done. Therefore, the switching pawl can be rotated toward one side in the circumferential direction as the switching wheel rotates.
Further, by rotating the switching claw, the rotation shaft can be rotated toward one side in the circumferential direction via the rotating plate. Therefore, the power transmitted to the switching wheel can be transmitted to the train of wheels to be transmitted via the switching transmission pinion of the rotating shaft portion.

Next, in contrast to the case described above, when the switching wheel is rotated about the first axis toward the other side in the circumferential direction by the power transmitted from the power source, the plurality of switching teeth rotate in the same direction. In this case, since the inclined surface of the switching tooth moves over the engaging portion of the switching pawl, the switching pawl rotates around the second axis while resisting the biasing force (pressing force) of the spring member. swing. As a result, the engagement of the engagement portion with the engagement surface is released, so that the switching wheel can be idly rotated about the first axis toward the other side in the circumferential direction.

Therefore, when power is transmitted to the switching wheel to rotate the switching wheel toward one side in the circumferential direction, the engaging surface of the switching tooth portion and the engaging portion are maintained in an engaged state. However, the rotating plate and the entire rotating shaft portion can be rotated in the same direction, and power can be transmitted to the train wheel to be transmitted.
Conversely, when power is transmitted to the switching wheel so as to rotate the switching wheel toward the other side in the circumferential direction, only the switching wheel can be idled, and the transmitted train wheel can be rotated. It is possible to prevent power transmission.
Therefore, even if the switching wheel rotates in two directions, power can be transmitted so that the train of wheels to be transmitted always rotates in one direction. Therefore, it is possible to use the switching transmission wheel for, for example, an automatic winding mechanism.

In particular, the switching claw portion has a switching arm portion formed so as to extend toward one side in the circumferential direction from the second axis, which is the swing center, and the engaging portion is provided at the tip portion of the switching arm portion. is formed. Therefore, when the switching wheel rotates to one side in the circumferential direction, the switching pawl can be rotated so as to pull the switching arm. Therefore, unlike the prior art, it can function as a so-called pulling claw type switching claw that exerts a tensile force on the switching arm.
In this case, even if the arm length of the switching arm portion is formed long, unlike the conventional pushing pawl type, it is easy to maintain the state of engagement between the engaging surface and the engaging portion, and it is difficult to disengage. can be secured. Therefore, the length of the switching arm portion can be made longer than before, so that the engaging portion can be pushed aside with a small force against the urging force of the spring member. Therefore, it is possible to reduce the rotation load when the switching wheel idles, and when it is used in an automatic winding mechanism or the like, it is possible to improve the winding performance.

(2) The engaging portion maintains the engaged state with the engaging surface when the switching wheel rotates about the first axis toward one side in the circumferential direction, and the switching wheel rotates toward the one side in the circumferential direction. Engagement with the engaging surface may be released by the inclined surface when rotating about the first axis toward the other side in the circumferential direction.

In this case, the effects described above can be achieved more reliably. In other words, even if the switching wheel rotates in two directions, power can be transmitted so that the train of wheels to be transmitted always rotates in one direction. It becomes possible.

(3) The rotating plate is provided with a restricting member that restricts swinging of the switching pawl about the second axis when the engaging portion is disengaged from the engaging surface. Also good.

In this case, when the switching wheel idles due to the disengagement of the engaging portion from the engaging surface, the switching pawl portion around the second axis is adjusted by using a restricting member such as a stop. Rocking can be limited. As a result, it is possible to prevent the switching claw portion from swinging excessively, thereby preventing, for example, the spring member from being largely deformed and plastically deformed. As a result, it is possible to operate stably over a long period of time, and to improve the operation reliability.
In particular, when a drop impact is applied or when a manual winding operation is performed, it is assumed that the switching claw portion may swing excessively. However, even in such a case, it is possible to effectively prevent the spring member from being significantly deformed.

(4) The spring member may be formed separately from the switching claw portion and combined with the rotating plate.

In this case, since the spring member is formed separately from the switching claw portion, the spring member can be designed independently and, for example, a different material, plating, or the like can be selected from the switching claw portion. is possible.

(5) The spring member may be formed integrally with the switching claw portion and combined with the rotating plate.

In this case, since the switching claw portion and the spring member are integrally formed, the number of parts can be reduced, and the weight and cost can be reduced, and the ease of assembly can be improved.

(6) The self-winding mechanism according to the present invention includes the switching transmission wheel, the rotating weight that is rotatable in two directions about the third axis and functions as the power source, the ratchet wheel for winding the mainspring, and the and the driven train wheel that connects the switching transmission pinion, and the switching wheel and the switching pawl are provided in pairs so as to be arranged on both sides in the first axial direction with the rotary plate interposed therebetween. , of the pair of switching wheels, the switching wheel positioned closer to the switching transmission pinion than the rotary plate is a first switching wheel that rotates with the rotation of the oscillating weight; The remaining switching wheel is a second switching wheel that rotates in the opposite direction to the first switching wheel as the oscillating weight rotates. The switching pawl positioned on the switching transmission pinion side serves as a first switching pawl that operates in conjunction with the first switching wheel, and the remaining switching pawl of the pair of switching pawl serves as the second switching pawl. It is characterized by being a second switching pawl that operates in conjunction with the vehicle.

According to the self-winding mechanism of the present invention, when the oscillating weight rotates in two directions about the third axis, the rotation causes the first switching wheel and the second switching wheel to move in opposite directions about the first rotation axis. rotate to Therefore, when the first switching wheel rotates toward one side in the circumferential direction due to the rotation of the oscillating weight, the second switching wheel rotates toward the other side in the circumferential direction.

When the first switching wheel rotates toward one side in the circumferential direction, the first switching pawl rotates together with the first switching wheel in the same direction as described above, thereby rotate in the same direction. Therefore, the power transmitted to the first switching wheel can be transmitted to the transmitted train wheel via the switching transmission pinion, and can be transmitted to the ratchet wheel via the transmitted train wheel to wind up the mainspring.

When the first switching wheel described above rotates, the second switching wheel rotates toward the other side in the circumferential direction. At this time, the second switching pawl portion rotates toward one side in the circumferential direction along with the rotation of the rotating plate described above. Therefore, the second switching wheel rotates toward the other side in the circumferential direction with respect to the second switching pawl portion that rotates toward the one side in the circumferential direction. As a result, the engaging surface of the switching tooth portion of the second switching wheel and the engaging portion of the second switching pawl do not engage with each other, as in the case described above. is idle. Therefore, the rotation of the second switching wheel does not cause the rotary shaft to rotate.

Next, as the oscillating weight rotates, the first switching wheel rotates toward the other side in the circumferential direction, and the second switching wheel rotates toward the one side in the circumferential direction, contrary to the case described above. In this case, since the movement is reversed from the above case, the power transmitted to the second switching wheel can be transmitted to the ratchet wheel via the switching transmission pinion, and the ratchet wheel rotates in the same direction as before. to wind the mainspring. Further, since the first switching wheel is idling, the rotation of the first switching wheel does not cause the rotating shaft portion to rotate.

Therefore, by utilizing the power of the oscillating weight that rotates in two directions, the rotary shaft portion having the switching transmission pinion can always be rotated in the same direction, and the ratchet wheel can be rotated to wind up the mainspring. In particular, it is possible to reduce the rotational load when the first switching wheel and the second switching wheel idle, which leads to an improvement in the hoisting performance.

(7) A timepiece movement according to the present invention includes the automatic winding mechanism.
(8) A timepiece according to the present invention includes the timepiece movement described above.

In this case, since the above-described automatic winding mechanism is provided, a highly reliable timepiece movement and timepiece with improved winding performance can be obtained.

According to the present invention, it is possible to reduce the rotation load, which leads to an improvement in the hoisting performance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a first embodiment according to the present invention, and is an external view of a timepiece; FIG. 1 is a perspective view of an automatic winding mechanism in a movement. FIG. 3 is a perspective view of a switching transmission wheel shown in FIG. 2; FIG. 4 is a perspective view showing a state in which an upper switching gear is removed from the state shown in FIG. 3; FIG. 7 is a longitudinal sectional view of the switching transmission wheel shown in FIG. 3, and is a longitudinal sectional view taken along line AA shown in FIG. 6; FIG. 6 is a plan view showing the relationship between an upper switching ratchet wheel, an upper switching pawl portion, and a spring member shown in FIG. 5; 6 is a plan view taken along line BB shown in FIG. 5, showing the relationship between the lower stage switching ratchet wheel, the lower end switching pawl portion and the spring member; FIG. FIG. 10 is a diagram showing a second embodiment according to the present invention, and is a plan view showing the relationship between an upper switching ratchet wheel, an upper switching pawl portion, and a spring member; FIG. 10 is a diagram showing a third embodiment according to the present invention, and is a plan view showing the relationship between an upper switching ratchet wheel, an upper switching pawl portion, and a spring member. FIG. 10 is a diagram showing a fourth embodiment according to the present invention, and is a plan view showing the relationship between the upper switching pawl wheel, the upper switching pawl portion, and the spring member.

(First embodiment)
A first embodiment according to the present invention will be described below with reference to the drawings. In this embodiment, a self-winding mechanical timepiece will be described as an example of the timepiece.

(Basic structure of watch)
In general, the mechanical body including the driving part of the watch is called "movement". A dial and hands are attached to this movement, and it is called a "complete" watch when it is placed in a watch case. Of the two sides of the main plate that constitutes the substrate of the watch, the side on which the glass of the watch case is located (that is, the side on which the dial is located) is referred to as the "back side" of the movement. Of the two sides of the main plate, the side on which the case back of the watch case is located (that is, the side opposite to the dial) is referred to as the "front side" of the movement.
In this embodiment, the direction from the dial to the back cover of the case is defined as the upper side, and the opposite side is defined as the lower side.

As shown in FIG. 1, the complete watch 1 of the present embodiment contains a movement (watch movement according to the present invention) 10 and at least information relating to time in a watch case 2 consisting of a case back and glass 3 (not shown). and hands including an hour hand 5 indicating the hour, a minute hand 6 indicating the minute, and a second hand 7 indicating the second.

The movement 10 includes a main plate (not shown), a train wheel bridge and a balance bridge (not shown) arranged on the front side of the main plate, and the like. Between the main plate and the train wheel bridge and the balance bridge, there are the front train wheel, the escapement that controls the rotation of the front train wheel, the governor that regulates the escapement, the manual winding mechanism, and the An automatic winding mechanism 11 is mainly provided. In this embodiment, illustration of the front train wheel, escapement, governor, and manual winding mechanism is omitted.
A back wheel train (not shown) and the like are arranged on the back side of the main plate, and a dial plate 4 is arranged so as to be visible through the glass 3 .

A winding stem guide hole (not shown) is formed in the main plate, and a winding stem 12 shown in FIG. 1 is rotatably incorporated in the winding stem guide hole about an axis. A crown 13 is connected to the winding stem 12 . As a result, the winding stem 12 can be rotated via the crown 13 .

The axial position of the winding stem 12 is determined by a switching device (not shown) having a lever, a bar, a bar spring, and the like. On the guide shaft portion of the winding stem 12, a non-illustrated wheel is attached so as to be rotatable relative to the winding stem 12 and immovable in the axial direction. A handwheel (not shown) is attached to a portion of the winding stem 12 located on the distal end side of the handwheel so as to be non-rotatable and axially movable with respect to the winding stem 12 .

The wheel and the handwheel can mesh with each other, for example, when the winding stem 12 is set at the winding stem 12 position (zero stage position) closest to the movement 10 along the axial direction. Therefore, by rotating the winding stem 12 via the crown 13 in this state, it is possible to rotate the handwheel about the axis coaxial with the winding stem 12 via the handwheel.

By rotating the ratchet wheel, it is possible to rotate the ratchet wheel 20 shown in FIG. 2 via a manual winding mechanism. Furthermore, by rotating the ratchet wheel 20, it is possible to wind the mainspring (the power source of the movement) housed inside the barrel wheel 21.

The front wheel train mainly includes a barrel wheel 21, a second wheel, a third wheel and a fourth wheel. In this embodiment, illustration of the second wheel, third wheel, and fourth wheel is omitted. The center wheel, third wheel and fourth wheel are rotated in order with the rotation of the barrel wheel 21 which is rotated by the elastic restoring force of the wound mainspring.

The second hand 7 shown in FIG. 1 rotates based on the rotation of the fourth wheel and rotates at a rotational speed controlled by the escapement and the speed governor, that is, one rotation per minute. The minute hand 6 rotates based on the rotation of the center wheel & pinion or the rotation of a minute wheel (not shown) that rotates with the rotation of the center wheel & pinion, and rotates at a rotational speed regulated by the escapement and governor, that is, 1 Rotate once in time. The hour hand 5 rotates via a date wheel (not shown) based on the rotation of an hour wheel (not shown) that rotates with the rotation of the center wheel & pinion, and the rotation is regulated by an escapement and a speed governor. Speed, i.e., one rotation in 12 hours or 24 hours.

The escapement has an escape wheel that meshes with the fourth wheel and rotates by the power transmitted from the mainspring, and an anchor that causes the escape wheel to escape and rotate regularly. control columns. The governor mainly uses a balance spring (not shown) as a power source, and has a balance that reciprocates (rotates forward and backward) at a steady amplitude (swing angle) corresponding to the output torque of the barrel wheel 21 .

As shown in FIG. 2, the barrel wheel 21 includes a barrel stem 23 rotatably supported by the main plate and the train wheel bridge, and a barrel rotatable relative to the barrel stem 23. A case 22 is provided. The barrel case 22 is formed with a barrel gear 22a that meshes with the center wheel.

The mainspring is housed in the barrel case 22 while being spirally wound around the barrel stem 23 . The mainspring is wound by the rotation of the barrel stem 23, and rotates the barrel case 22 by the elastic restoring force when it is unwound, and transmits power (rotational torque) to the front train wheel via the center wheel & pinion.

The ratchet wheel 20 is arranged between the barrel case 22 and the train wheel bridge, and is fixed to the barrel stem 23 by, for example, press fitting. The ratchet wheel 20 has a ratchet gear 20a that meshes with a transmission gear (not shown) that constitutes a manual winding mechanism, and is capable of rotating about an axis O1 in a predetermined direction.
In this embodiment, as an example, the ratchet wheel 20 rotates clockwise as indicated by the arrow in FIG. to explain.

As a result, the clockwise rotation of the ratchet wheel 20 makes it possible to wind the mainspring through the barrel stem 23 . A second transmission gear 52a of a second transmission wheel 52 in an automatic winding mechanism 11, which will be described later, meshes with the square hole gear 20a. Therefore, the ratchet wheel 20 can be rotated clockwise via the second transmission wheel 52 , and the mainspring can be wound by the automatic winding mechanism 11 .

The ratchet wheel 20 is engaged with a click (not shown) that regulates the reverse rotation of the ratchet wheel 20 in order to prevent the wound mainspring from unwinding. The click allows the ratchet wheel 20 to rotate clockwise, but restricts its counterclockwise rotation (hereinafter simply referred to as counterclockwise).

(automatic winding mechanism)
The automatic winding mechanism 11 is a mechanism that automatically winds the mainspring by rotating the oscillating weight 30 that operates according to the movement of the arm of the user, for example. and a switching transmission wheel 60, a transmission train wheel (transmitted train wheel according to the present invention) 50 arranged between the ratchet wheel 20 and the switching transmission wheel 60, It has

The oscillating weight 30 is rotatable in two directions around an axis (third axis according to the present invention) O2 and functions as a power source for operating the automatic winding mechanism 11 .
Specifically, the oscillating weight 30 includes a ball bearing 31, an oscillating weight body 35, and an oscillating weight 36, and rotates clockwise and counterclockwise about the axis O2 according to the movement of the user's arm. Rotate in both clockwise directions.

The ball bearing 31 includes an inner ring 32 fixed to a receiving member (not shown), an outer ring 33 surrounding the inner ring 32, and a plurality of balls (not shown) interposed between the inner ring 32 and the outer ring 33 so as to be able to roll. ing. This allows the outer ring 33 to rotate relative to the inner ring 32 about the axis O2 via the balls. An outer peripheral surface of the outer ring 33 is formed with an oscillating weight pinion 33a over the entire circumference.

The oscillating weight body 35 is formed in a fan shape in a plan view, and is fitted around the outer ring 33 . The oscillating weight 36 is fixed to the outer peripheral edge of the oscillating weight body 35 . Therefore, the oscillating weight 36, the oscillating weight body 35, and the outer ring 33 are integrally rotatable about the axis O2.

The intermediate wheel train 40 includes a first intermediate wheel 41 that rotates about an axis O3, a second intermediate wheel 42 that rotates about an axis O4, and a third intermediate wheel 43 that rotates about an axis O5. The first intermediate wheel 41, the second intermediate wheel 42, and the third intermediate wheel 43 are rotatably supported by receiving members (not shown).

The first intermediate wheel 41 includes a first intermediate gear 41a that meshes with the oscillating weight pinion 33a, and a first intermediate pinion 41b. As a result, the first intermediate wheel 41 can rotate about the axis O<b>3 as the oscillating weight 30 rotates, and can also rotate in a direction opposite to the rotating direction of the oscillating weight 30 .

The second intermediate wheel 42 includes a second intermediate gear 42a meshing with the first intermediate pinion 41b and a second intermediate pinion 42b. As a result, the second intermediate wheel 42 can rotate about the axis O<b>4 as the first intermediate wheel 41 rotates, and can also rotate in the same direction as the rotating weight 30 .

The third intermediate wheel 43 has a third intermediate gear 43a that meshes with a second intermediate pinion 42b. As a result, the third intermediate wheel 43 can rotate about the axis O5 as the second intermediate wheel 42 rotates, and can also rotate in a direction opposite to the rotational direction of the oscillating weight 30 .

The transmission train wheel 50 includes a first transmission wheel 51 that rotates about an axis O6 and a second transmission wheel 52 that rotates about an axis O7. The first transmission wheel 51 and the second transmission wheel 52 are rotatably supported by receiving members (not shown).

The first transmission wheel 51 includes a first transmission gear 51a that meshes with a switching transmission pinion 73 of the switching transmission wheel 60, which will be described later, and a first transmission pinion 51b. As a result, the first transmission wheel 51 is rotatable about the axis O6 as the switching transmission pinion 73 rotates.
In particular, the switching transmission pinion 73 is configured to always rotate counterclockwise, as will be described later in detail. Therefore, the first transmission wheel 51 is always rotatable clockwise around the axis O6 as the switching transmission pinion 73 rotates.

The second transmission wheel 52 has a second transmission gear 52a that meshes with the first transmission pinion 51b and the square hole gear 20a. As a result, the second transmission wheel 52 can rotate counterclockwise around the axis O7 as the first transmission wheel 51 rotates. Therefore, the second transmission wheel 52 can always rotate the ratchet wheel 20 clockwise as described above.

(switching transmission wheel)
As shown in FIG. 2, the switching transmission wheel 60 rotates around the axis (first axis) O8 by the power of the oscillating weight 30 transmitted via the intermediary train wheel 40, It plays a role of transmitting the power of the oscillating weight 30 to the ratchet wheel 20 via the transmission wheel train 50 in a state where the rotation in one direction is switched to the rotation in one direction.

As shown in FIGS. 3 to 5, the switching transmission wheel 60 is combined with an axle (rotating shaft portion according to the present invention) 65 rotatable about the axis O8 so as to be relatively rotatable with respect to the axle 65, A pair of switching wheels 61 rotating about an axis O8 by power transmitted from the oscillating weight 30 via the intermediary train wheel 40, a rotating plate 62 integrally combined with the axle 65, and an oscillation axis (in the present invention, and a pair of switching claws 63 integrally combined with the rotary plate 62 so as to be swingable about the second axis O9.

In a plan view seen from the direction of the axis O8, which is the central axis of the switching transmission wheel 60, the direction intersecting with the axis O8 is called the radial direction, and the direction of rotation around the axis O8 is called the circumferential direction.

The axle 65 is rotatably supported by receiving members (not shown) at the upper tenon portion 70 and the lower tenon portion 71 . A switching transmission pinion 73 with which the first transmission gear 51 a of the first transmission wheel 51 meshes is formed in a portion of the axle 65 positioned below the upper tenon portion 70 . A first stepped portion 74 is formed in a portion of the axle 65 positioned below the switching transmission pinion 73, and a second stepped portion 75 is formed in a portion positioned below the first stepped portion 74. It is

A cylindrical upper seat 80 is fixed to the first step portion 74 of the axle 65 by press fitting or the like. The upper seat 80 includes a first upper seat tube 81 fixed to the first stepped portion 74 and a second upper seat tube extending downward from the lower end of the first upper seat tube 81 and having a smaller diameter than the first upper seat tube 81. and an annular upper seat collar portion 83 extending radially outward from the upper end portion of the first upper seat cylinder 81 .
The upper seat 80 configured in this manner is fixed to the first stepped portion 74 in a state in which the upper seat collar portion 83 is in contact with the switching transmission pinion 73 from below.

A cylindrical lower seat 85 is fixed to the second stepped portion 75 of the axle 65 by press fitting or the like. The lower seat 85 includes a lower seat cylinder 86 fixed to the second stepped portion 75 and an annular lower seat flange 87 extending radially outward from the lower end of the lower seat cylinder 86 . .
The lower seat 85 configured in this manner is fixed to the second stepped portion 75 while being positioned below the upper seat 80 .

The rotating plate 62 is fixed to the second upper seat cylinder 82 by press fitting or the like. Thereby, the rotating plate 62 is integrally combined with the axle 65 via the upper seat 80 .
In the illustrated example, the rotating plate 62 is formed in a disk shape with a larger diameter than the upper seat flange portion 83 and the lower seat flange portion 87 . However, it is not limited to this case.
Three connecting pins 90, 91, and 92 are fixed to the rotating plate 62 by press-fitting or the like. These connecting pins 90 , 91 , 92 are formed in a columnar shape and are formed so as to protrude from the upper surface side and the lower surface side of the rotary plate 62 .

A pair of switching wheels 61 are arranged on both upper and lower sides of the rotating plate 62 .
Of the pair of switching wheels 61 , the switching wheel 61 located closer to the switching transmission pinion 73 than the rotary plate 62 is an upper switching wheel (first switching wheel according to the present invention) 100 . Among the pair of switching wheels 61 , the switching wheel 61 located below the rotating plate 62 is a lower switching wheel (second switching wheel according to the present invention) 110 .

The pair of switching claws 63 are arranged on both upper and lower sides of the rotating plate 62 .
Of the pair of switching claws 63, the switching claw 63 positioned closer to the switching transmission pinion 73 than the rotary plate 62 is an upper switching claw (first switching claw according to the present invention) that operates in conjunction with the upper switching wheel 100. part) 120. Among the pair of switching claws 63, the switching claw 63 located below the rotating plate 62 is a lower switching claw (second switching claw according to the present invention) that operates in conjunction with the lower switching wheel 110. 130.

The relationship between the upper stage switching wheel 100 and the upper stage switching pawl portion 120 will be described in detail.
As shown in FIGS. 5 and 6, the upper switching wheel 100 includes an upper switching ratchet wheel 101 which is rotatably combined with the first upper seat cylinder 81 of the upper seat 80, and which is fixed to the upper switching ratchet wheel 101. and an upper stage switching gear 105.

The upper switching ratchet wheel 101 has a plurality of switching tooth portions 102 over the entire circumference, and an upper connecting cylinder 103 protruding upward from the inner peripheral edge portion. The switching tooth portion 102 has an engaging surface 102a oriented counterclockwise, which is one side in the circumferential direction, and an inclined surface 102b oriented clockwise, which is the other side in the circumferential direction. considered to be the tooth.

As shown in FIGS. 3 and 5, the upper switching gear 105 is fixed to the upper connecting cylinder 103 by press fitting or the like. Thus, the entire upper switching wheel 100 is combined with the upper seat 80 so as to be relatively rotatable with respect to the axle 65 . Further, the upper switching gear 105 has an upper switching tooth portion 105 a that meshes with the second intermediate pinion 42 b of the second intermediate wheel 42 .
Therefore, the upper switching wheel 100 as a whole is rotatable about the axis O8 as the second intermediate pinion 42b rotates, and rotates in a direction opposite to the rotation direction of the second intermediate wheel 42 (that is, It is possible to rotate in a direction opposite to the direction of rotation of the oscillating weight 30 .

As shown in FIGS. 5 and 6 , the upper switching claw portion 120 is placed on the upper surface side of the rotating plate 62 so as to be arranged in the gap between the rotating plate 62 and the upper switching gear 105 . Therefore, the upper switching pawl portion 120 is arranged radially outside the upper switching pawl wheel 101 .

The upper switching claw portion 120 is formed in a generally arcuate shape extending along the circumferential direction, and its central portion 121 is combined with a connecting pin 90 fixed to the rotating plate 62 so as to be relatively rotatable. As a result, the upper switching claw portion 120 can swing radially about the connecting pin 90 .
Note that the center axis of the connecting pin 90 is the swing axis O9. Therefore, the upper switching claw portion 120 is integrally combined with the rotary plate 62 via the connecting pin 90 so as to be able to swing about the swing axis O9.

The upper switching claw portion 120 includes a first switching arm portion (switching arm portion according to the present invention) 122 formed so as to extend counterclockwise from a central portion 121 combined with the connecting pin 90, and a central portion 121. and a second switching arm portion 123 formed so as to extend clockwise from the . An engaging portion 124 is formed at the tip of the first switching arm portion 122 so as to protrude radially inward and engage releasably with the switching tooth portion 102 of the upper switching ratchet wheel 101 . there is

The engaging portion 124 is in contact with the inclined surface 102b of the switching tooth portion 102 and releasably engaged with the engaging surface 102a of the switching tooth portion 102 from the counterclockwise direction. Thereby, the engaging portion 124 engages between the switching tooth portions 102 adjacent in the circumferential direction so as to enter from the outside in the radial direction.

The upper switching claw portion 120 configured as described above is biased about the swing axis O9 by the spring member 140 so that the engaging portion 124 is pressed against the engaging surface 102a of the switching tooth portion 102. there is

The spring member 140 is formed separately from the upper switching claw portion 120, and the remaining two connecting pins 91 and 92 are arranged in a gap between the rotary plate 62 and the upper switching gear 105. It is combined with the upper surface side of the rotating plate 62 by utilizing.

The spring member 140 is formed so as to extend in the circumferential direction and a base portion 141 disposed on the opposite side of the upper switching claw portion 120 in the radial direction across the axis O8, and a base end portion 142a is connected to the base portion 141. In addition, a spring main body 142 having a tip portion 142b that presses the second switching arm portion 123 of the upper switching claw portion 120 radially outward is provided.

The base portion 141 is formed in a generally arcuate shape so as to extend along the circumferential direction, and both ends in the circumferential direction are fitted to the connecting pins 91 and 92, respectively. Thereby, the entire spring member 140 is integrally fixed to the rotating plate 62 using the two connecting pins 91 and 92 .

The spring main body 142 is, for example, a plate spring extending along the circumferential direction, and the base end portion 142a is connected to the base portion 141 as described above. In addition, in this embodiment, the spring main body 142 is formed integrally with the base portion 141 . The spring body 142 is formed to extend counterclockwise along the circumferential direction so as to wrap around the outside of the base portion 141 from the base end portion 142 a , and the tip portion 142 b of the spring body 142 is the second switching claw of the upper switching claw portion 120 . It is in contact with the arm portion 123 from the inside in the radial direction.

As a result, the spring body 142 presses the second switching arm portion 123 radially outward using its own elastic restoring force. Therefore, the upper switching pawl portion 120 is always biased so that the engaging portion 124 is pressed toward the switching tooth portion 102 side.

Since the upper switching wheel 100 and the upper switching pawl portion 120 are configured as described above, the engaging portion 124 of the upper switching pawl portion 120 rotates about the axis O8 in the counterclockwise direction of the upper switching wheel 100. When the engagement with the engagement surface 102a is maintained and the upper switching wheel 100 rotates clockwise about the axis O8, the inclined surface 102b releases the engagement with the engagement surface 102a. be. This point will be described in detail later.

Further, the base portion 141 of the spring member 140 has a contacting portion (the present invention 143 is formed.

The contact portion 143 is capable of restricting swinging of the upper switching pawl portion 120 about the swing axis O9 when the engagement of the engaging portion 124 with the engaging surface 102a is released.
Specifically, the upper switching claw portion 120 is configured such that the first switching arm portion 122 moves radially outward when the engaging portion 124 is disengaged from the engaging surface 102a. It swings around the swing axis O9 against the pressing force (biasing force) of the spring member 140 . At this time, the first switching arm portion 122 can be brought into contact with the contact portion 143 when the upper switching claw portion 120 swings by a certain amount. Therefore, it is possible to prevent the upper switching claw portion 120 from swinging excessively by restricting the swinging of the upper switching claw portion 120 by using the contact portion 143 .

Next, the relationship between the lower stage switching wheel 110 and the lower stage switching pawl portion 130 will be described.
The lower switching wheel 110 and the lower switching pawl portion 130 are configured in the same manner as the upper switching wheel 100 and the upper switching pawl portion 120 described above, and have the same relative positional relationship.

However, in the present embodiment, the lower switching claw portion 130 is arranged at a position shifted by 120° in the circumferential direction from the position of the upper switching claw portion 120 about the axis O8. Therefore, the lower stage switching pawl portion 130 is combined using the coupling pin 91 instead of the coupling pin 90 to which the upper stage switching pawl portion 120 is coupled.
It should be noted that the present invention is not limited to this case, and the lower switching claw portion 130 is combined using the same connecting pin 90 so as to be arranged opposite to the lower switching claw portion 120 with the rotary plate 62 interposed therebetween. It doesn't matter if

As shown in FIGS. 4, 5 and 7, the lower switching ratchet wheel 110 includes a lower switching ratchet wheel 111 which is rotatably combined with the lower seat cylinder 86 of the lower seat 85, and a lower switching ratchet wheel 111. and a lower stage switching gear 115 fixed relative thereto.

The lower switching ratchet wheel 111 has a plurality of switching tooth portions 112 over the entire circumference, and has a lower connecting cylinder 113 projecting downward from the inner peripheral edge portion.
The switching tooth portion 112 has an engaging surface 112a directed counterclockwise, which is one side in the circumferential direction that revolves around the axis O8, and an inclined surface 112b directed clockwise, which is the other side in the circumferential direction. considered to be the tooth.

The lower switching gear 115 is fixed to the lower connecting cylinder 113 by press fitting or the like. As a result, the entire lower switching wheel 110 is combined with the lower seat 85 so as to be relatively rotatable with respect to the axle 65 . Further, the lower switching gear 115 has a lower switching tooth portion 115 a that meshes with the third intermediate gear 43 a of the third intermediate wheel 43 .
Therefore, the entire lower switching wheel 110 is rotatable about the axis O8 as the third intermediate wheel 43 rotates, and rotates in a direction opposite to the rotational direction of the third intermediate wheel 43 (that is, It is possible to rotate in the same direction as the rotational direction of the oscillating weight 30 .

The lower switching claw portion 130 is placed on the upper surface side of the lower switching gear 115 so as to be arranged in the gap between the rotary plate 62 and the lower switching gear 115 .
The lower stage switching pawl portion 130 is rotatably combined with a connecting pin 91 fixed to the rotary plate 62 and is radially swingable about the connecting pin 91 . Accordingly, the lower switching claw portion 130 is integrally combined with the rotary plate 62 via the connecting pin 91 so as to be able to swing about the swing axis O10 which is the central axis of the connecting pin 91 .

The lower switching claw portion 130 includes a first switching arm portion (switching arm portion according to the present invention) 132 formed so as to extend counterclockwise from a central portion 131 combined with the connecting pin 91, and a central portion 131. and a second switching arm portion 133 formed so as to extend clockwise from the .
An engaging portion 134 is formed at the tip of the first switching arm portion 132 so as to protrude radially inward and engage releasably with the switching tooth portion 112 of the lower switching ratchet wheel 111 . there is

The engaging portion 134 is in contact with the inclined surface 112b of the switching tooth portion 112 and releasably engaged with the engaging surface 112a of the switching tooth portion 112 from the counterclockwise direction. As a result, the engaging portion 134 engages between the switching tooth portions 112 adjacent in the circumferential direction so as to enter from the outside in the radial direction.

The lower switching pawl portion 130 configured as described above is biased about the swing axis O10 by the spring member 150 so that the engaging portion 134 is pressed against the engaging surface 112a of the switching tooth portion 112. there is
The spring member 150 is formed separately from the lower switching claw portion 130 and combined with the upper surface side of the lower switching gear 115 using two connecting pins 90 and 92 .

The spring member 150 has a base 151 and a spring body 152 .
The base portion 151 is formed in a generally arcuate shape so as to extend along the circumferential direction, and both ends in the circumferential direction are fitted to the connecting pins 90 and 92, respectively. Thereby, the entire spring member 150 is integrally fixed to the rotating plate 62 using two connecting pins 90 and 92 .

The spring body 152 is, for example, a leaf spring extending in the circumferential direction, and is formed to extend counterclockwise along the circumferential direction so as to wrap around the outside of the base portion 151 from the base end portion 152a. 152b is in contact with the second switching arm portion 133 of the lower switching claw portion 130 from the inside in the radial direction.

As a result, the spring body 152 presses the second switching arm portion 133 radially outward using its own elastic restoring force. As a result, the lower switching pawl portion 130 is always urged around the swing axis O10 so that the engaging portion 134 is pressed against the switching tooth portion 112 side.

Since the lower stage switching wheel 110 and the lower stage switching pawl portion 130 are configured as described above, the engaging portion 134 of the lower stage switching pawl portion 130 rotates around the axis O8 as the lower stage switching wheel 110 turns counterclockwise. When the lower switching wheel 110 rotates clockwise about the axis O8, the inclined surface 112b releases the engagement with the engaging surface 112a. be done.

Further, the base portion 151 of the spring member 150 has a contacting portion (the present invention 153 is formed.

(Action of automatic winding mechanism)
Next, operation of the automatic winding mechanism 11 having the switching transmission wheel 60 configured as described above will be described.
As shown in FIG. 2, the oscillating weight 30 appropriately rotates in two directions about the axis O2 in accordance with, for example, the movement of the user's arm. As the oscillating weight 30 rotates, its power (rotational torque) is transmitted to the switching transmission wheel 60 via the first intermediate wheel 41, the second intermediate wheel 42, and the third intermediate wheel 43. and the lower-stage switching wheel 110 can be rotated in opposite directions to each other around the axis O8.

A specific description will be given.
When the oscillating weight 30 shown in FIG. 2 rotates clockwise, the first intermediate wheel 41 rotates counterclockwise, the second intermediate wheel 42 rotates clockwise, and the third intermediate wheel 43 rotates counterclockwise. direction can be rotated. Therefore, the upper switching wheel 100 meshing with the second intermediate pinion 42b can be rotated counterclockwise, and the lower switching wheel 110 meshing with the third intermediate gear 43a can be rotated clockwise.
Therefore, the upper stage switching wheel 100 and the lower stage switching wheel 110 can be rotated in directions opposite to each other. Even if the oscillating weight 30 rotates counterclockwise, the rotation direction of each wheel is reversed. You can rotate it in the opposite direction.

For example, when the rotating weight 30 rotates clockwise and the upper switching wheel 100 rotates counterclockwise, as shown in FIG. Rotate counterclockwise. At this time, since the engaging portion 124 of the upper switching pawl portion 120 is engaged with the engaging surface 102a of the switching tooth portion 102 from the counterclockwise side, the engaging surface 102a and the engaging portion 124 are engaged with each other. can maintain the mating state. Therefore, as indicated by an arrow F1 in FIG. 6, the rotational torque of the upper switching wheel 100 can be transmitted to the upper switching pawl portion 120, and the upper switching pawl portion 120 can be rotated counterclockwise so as to be pulled. can.

As the upper switching claw 120 rotates, the rotary plate 62 rotates, so that the axle 65 can be rotated counterclockwise as shown in FIG. Therefore, the power transmitted to the upper stage switching wheel 100 can be transmitted to the transmission wheel train 50 side via the switching transmission pinion 73, and can also be transmitted to the ratchet wheel 20 via the transmission wheel train 50 to wind the mainspring. can.
That is, by rotating the axle 65 and the switching transmission pinion 73 counterclockwise, the first transmission wheel 51 can be rotated clockwise and the second transmission wheel 52 can be rotated counterclockwise. Therefore, the ratchet wheel 20 can be rotated clockwise, and the mainspring can be wound.

By the way, as the rotary plate 62 rotates counterclockwise, the lower switching claw portion 130 also rotates counterclockwise accordingly, as shown in FIG. In addition, as the oscillating weight 30 rotates clockwise, the lower switching wheel 110 rotates clockwise as described above. In combination with these, the lower stage switching wheel 110 rotates clockwise with respect to the lower stage switching pawl portion 130 which rotates counterclockwise.
In this case, since the engaging surface 112a of the switching tooth portion 112 of the lower switching gear 115 and the engaging portion 134 of the lower switching pawl portion 130 do not engage with each other, the lower switching wheel 110 is idle. Become. Therefore, the rotation of the lower switching wheel 110 does not cause the axle 65 and the switching pinion 73 to rotate.

I will explain in detail.
When the lower switching wheel 110 rotates clockwise with respect to the lower switching claw 130 rotating counterclockwise, the inclined surface 112b of the switching tooth 112 moves toward the lower stage as indicated by arrow F2 in FIG. While pressing the engaging portion 134 of the switching claw portion 130 radially outward, the switching claw portion 130 moves so as to overcome the engaging portion 134 in the circumferential direction. As a result, the lower switching claw portion 130 swings about the swing axis O10 while resisting the biasing force (pressing force) of the spring member 150 . Thereby, the engagement of the engaging portion 134 with the engaging surface 112a is released.
As a result, the lower switching wheel 110 can be idly rotated counterclockwise.

As described above, when the upper switching wheel 100 rotates counterclockwise due to the rotation of the oscillating weight 30, the engaging surface 102a of the switching tooth portion 102 and the engaging portion 124 of the upper switching pawl portion 120 are engaged. While maintaining the combined state, the rotating plate 62 , the axle 65 and the switching transmission pinion 73 as a whole can be rotated counterclockwise, and power can be transmitted to the transmission train wheel 50 . At the same time, even if the lower-stage switching wheel 110 rotates clockwise, the lower-stage switching wheel 110 can be idly rotated clockwise. can.

Therefore, even if the upper switching wheel 100 and the lower switching wheel 110 rotate in opposite directions, power can be transmitted so that the transmission train wheel 50 always rotates in one direction. Therefore, as shown in FIG. 2, the ratchet wheel 20 can be rotated clockwise to wind up the mainspring.

Next, the case where the oscillating weight 30 shown in FIG. 2 rotates counterclockwise will be described.
In this case, contrary to the case described above, as the oscillating weight 30 rotates, the upper switching wheel 100 rotates clockwise and the lower switching wheel 110 rotates counterclockwise. Therefore, since the movement is opposite to that in the above case, while maintaining the state in which the engaging surface 112a of the switching tooth portion 112 of the lower stage switching wheel 110 and the engaging portion 134 of the lower stage switching pawl portion 130 are engaged with each other, , the rotating plate 62, the axle 65, and the switching transmission pinion 73 can be rotated counterclockwise, and power can be transmitted to the transmission train wheel 50.
At the same time, since the upper switching wheel 100 can be idly rotated clockwise, power can be prevented from being transmitted from the upper switching wheel 100 to the transmission wheel train 50 .
Therefore, in this case as well, power can be transmitted so that the transmission train wheel 50 always rotates in one direction, so that the ratchet wheel 20 can be rotated clockwise to wind the mainspring.

As described above, the power of the oscillating weight 30 rotating in two directions can be used to rotate the axle 65 having the switching transmission pinion 73 in the same counterclockwise direction at all times. The mainspring can be automatically wound by rotating it clockwise.

In particular, according to the switching transmission wheel 60 of the present embodiment, as shown in FIGS. 6 and 7, the upper switching claw portion 120 and the lower switching claw portion 130 move counterclockwise from the swing axes O9 and O10. It has first switching arm portions 122 and 132 formed to extend, and engagement portions 124 and 134 are formed at the tip portions thereof.

Therefore, taking the upper switching claw 120 as an example, as shown in FIG. 6, when the upper switching wheel 100 rotates counterclockwise, the first switching claw pulls the first switching arm 122 . Part 63 can be rotated. Therefore, unlike the prior art, it can function as a so-called pulling claw type switching claw that exerts a tensile force on the first switching arm 122 .

In this case, even if the arm length H of the first switching arm portion 122 is formed long, the engagement state between the engaging surface 102a and the engaging portion 124 can be easily maintained, unlike the conventional push claw type. It is possible to ensure a state in which it is difficult for the joint to come off. Therefore, the arm length H of the first switching arm portion 122 can be made longer than the conventional one, and the engagement surface 102a pushes away the first switching claw portion 63 against the biasing force of the spring member 140. It is possible to reduce the load on the upper stage switching wheel 100.
Therefore, the rotational load when the upper switching wheel 100 and the lower switching wheel 110 idle can be reduced, which leads to an improvement in the hoisting performance.

As described above, according to the automatic winding mechanism 11 provided with the switching transmission wheel 60 of the present embodiment, and the movement 10 and the timepiece 1 provided with the automatic winding mechanism 11, the rotational load can be reduced, Performance can be improved.

Further, as shown in FIGS. 6 and 7, the switching transmission wheel 60 of the present embodiment has contacting portions 143 and 153 for restricting swinging of the upper switching claw portion 120 and the lower switching claw portion 130. .
Therefore, when the upper-stage switching wheel 100 and the lower-stage switching wheel 110 idle, it is possible to limit the swinging of the upper-stage switching claw 120 and the lower-stage switching claw 130 by using the contact portions 143 and 153, thereby preventing excessive movement. can be prevented from swinging. As a result, for example, the spring bodies 142 and 152 of the spring members 140 and 150 can be prevented from being largely deformed and plastically deformed. Therefore, the switching transmission wheel 60 can be stably operated over a long period of time, and the operational reliability can be improved.

In particular, it is assumed that the upper switching pawl portion 120 and the lower switching pawl portion 130 will swing excessively in the event of a drop impact or a manual winding operation using the crown 13 .
In particular, when the ratchet wheel 20 is rotated clockwise by manual winding, the axle 65 of the switching transmission wheel 60 is forced to rotate counterclockwise via the transmission train wheel 50 . In this case, since the oscillating weight 30 is stopped, the upper switching claw 120 and the lower switching claw 130 move counterclockwise with respect to the stopped upper switching wheel 100 and lower switching wheel 110. , and the upper switching pawl portion 120 and the lower switching pawl portion 130 tend to swing greatly while being repelled by the switching tooth portions 102 and 112 . Therefore, the spring bodies 142 and 152 tend to be easily plastically deformed.
Even in such a case, by using the contact portions 143 and 153, it is possible to effectively prevent the spring bodies 142 and 152 from being greatly deformed.

Furthermore, since the spring members 140 and 150 are formed separately from the upper switching claw portion 120 and the lower switching claw portion 130, the spring members 140 and 150 can be designed independently. A different material, plating, or the like can be selected for the portion 120 and the lower switching claw portion 130 .

(Second embodiment)
Next, a second embodiment according to the present invention will be described with reference to the drawings. In addition, in the second embodiment, the same reference numerals are given to the same parts as the constituent elements in the first embodiment, and the description thereof will be omitted.

In the first embodiment, the spring bodies 142 and 152 urge the second switching arm portions 123 and 133 of the upper switching claw portion 120 and the lower switching claw portion 130 radially outward, so that the engaging portion 124 , 134 toward the switching tooth portions 102 and 112, but in the second embodiment, the spring body causes the first switching arm portions 122 and 132 of the upper switching claw portion 120 and the lower switching claw portion 130 to diametrically move. It is configured to bias toward the inside of the direction.

In this embodiment, the upper switching claw portion 120 will be described as an example.
As shown in FIG. 8, a switching transmission wheel 160 of this embodiment includes a spring member 161 having a spring body 162 circumferentially extending clockwise from a base end portion 162a connected to a base portion 141. As shown in FIG.

The spring body 162 extends clockwise from the base end portion 162a toward the tip end portion 162b so as to wrap around the base portion 141 and the first switching arm portion 122 of the upper switching claw portion 120 from the outside. The tip portion 162b of the spring body 162 urges the first switching arm portion 122 from the outside in the radial direction toward the inside. As a result, the engaging portion 124 formed at the tip of the first switching arm portion 122 is pressed toward the switching tooth portion 102 .

Further, the contact portion 143 is formed so as to protrude counterclockwise from the base portion 141 so as to be positioned radially inside the tip portion of the second switching arm portion 123 of the upper switching claw portion 120 . ing.

Even with the switching transmission wheel 160 of the present embodiment configured as described above, it is possible to achieve the same effects as those of the first embodiment.

(Third Embodiment)
Next, a third embodiment according to the present invention will be described with reference to the drawings. In addition, in the third embodiment, the same reference numerals are given to the same parts as the components in the second embodiment, and the description thereof will be omitted.
In the second embodiment, one upper switching claw portion 120 and one lower switching claw portion 130 are provided, but in this embodiment, a plurality of upper switching claw portions 120 and a plurality of lower switching claw portions 130 are provided. .

In this embodiment, the upper switching claw portion 120 will be described as an example.
As shown in FIG. 9 , the switching transmission wheel 170 of this embodiment includes two upper switching claws 120 . The number of upper switching claw portions 120 is not limited to two, and may be, for example, three or more.

The upper switching claw portions 120 are arranged symmetrically so as to face each other in the radial direction across the axis O8. Accordingly, the two upper switching claws 120 are combined with the rotary plate 62 via the connecting pins 90, respectively.

Further, a plate spring-like spring member 171 is integrally formed with the upper switching claw portion 120 . The spring member 171 is formed in a generally arcuate shape extending along the circumferential direction, and has a base end portion 171 a connected to the second switching arm portion 123 . The spring member 171 is formed so as to extend clockwise from the second switching arm portion 123 while wrapping around the outside of the second switching arm portion 123, and the other upper switching claw portion adjacent in the circumferential direction. It is arranged radially outside the first switching arm portion 122 at 120 .

The tip portion 171b of the spring member 171 urges the first switching arm portion 122 of the other upper switching claw portion 120 adjacent in the circumferential direction from the radially outer side toward the inner side. As a result, the engaging portions 124 formed at the tip of the first switching arm portion 122 are pressed toward the switching tooth portion 102 .

Furthermore, the tip end of the second switching arm portion 123 of the upper switching claw portion 120 is positioned radially outward with respect to the first switching arm portion 122 of the other upper switching claw portion 120 adjacent in the circumferential direction. It functions as a portion (limiting member according to the present invention) 173 .

Even with the switching transmission wheel 170 of this embodiment configured as described above, it is possible to achieve the same effects as those of the first embodiment.
In addition, in this embodiment, the number of teeth of the switching tooth portion 102 is an odd number. Therefore, when the engaging portion 124 of one upper switching pawl portion 120 is engaged with the engaging surface 102a of the switching tooth portion 102, the engaging portion 124 of the other upper switching pawl portion 120 is switched. The engagement with the engagement surface 102a of the tooth portion 102 is released.

As a result, until the engaging portion 124 of one upper switching claw portion 120 disengages from the engaging surface 102a of the switching tooth portion 102 and engages with the engaging surface 102a of the adjacent switching tooth portion 102, The engaging portion 124 of the other upper switching claw portion 120 can engage with the engaging surface 102 a of the switching tooth portion 102 .
As a result, it is possible to reduce the so-called dead angle. That is, the rotation angle of the oscillating weight 30 required for the axle 65 to resume counterclockwise rotation after the oscillating weight 30 starts to rotate is reduced, and the ratchet wheel 20 can be rotated more efficiently. , it becomes possible to wind the mainspring.

In the third embodiment, the two upper switching claws 120 are arranged symmetrically so as to face each other in the radial direction across the axis O8, and the number of teeth of the switching teeth 102 is an odd number. When the engaging portion 124 of one of the upper switching claws 120 is engaged with the engaging surface 102 a of the switching tooth portion 102 , the engaging portion 124 of the other upper switching claw portion 120 is engaged with the engaging surface 102 a of the switching tooth portion 102 . The case where it is configured so as not to engage with the engaging surface 102a has been described as an example.
However, it is not limited to this case. For example, the two upper switching claws 120 are arranged such that they are offset in the circumferential direction by half the angle of one tooth of the switching tooth 102 from positions that are symmetrical about the axis O8, and then The number of teeth of 102 may be even. Even in this case, the so-called non-operating angle can be reduced as in the case described above, and effects similar to those described above can be achieved.

(Fourth embodiment)
Next, a fourth embodiment according to the present invention will be described with reference to the drawings. In addition, in the fourth embodiment, the same reference numerals are given to the same parts as the constituent elements in the first embodiment, and the description thereof will be omitted.

In the first embodiment, the spring members 140 and 150 are provided separately from the upper switching claw portion 120 and the lower switching claw portion 130, respectively. A spring member is formed integrally with the claw portion 130 .

In this embodiment, the upper switching claw portion 120 will be described as an example.
As shown in FIG. 10, the switching transmission wheel 180 of the present embodiment includes an upper switching pawl portion 120 integrally formed with a leaf spring-like spring member 181 . The upper switching claw portion 120 has a configuration in which a spring member 181 is integrally formed instead of the second switching arm portion 123 in the first embodiment, and swings with respect to a connecting pin 190 fixed to the rotating plate 62. possibly combined.

The connecting pin 190 is formed in an elliptical shape in plan view having a pair of flat cut surfaces 191 facing each other and a pair of circular arc surfaces 192 facing each other. On the other hand, a connecting hole 195 for inserting the connecting pin 190 is formed in the central portion 121 of the upper switching claw portion 120 . The connecting hole 195 is formed in an elliptical shape in plan view having a pair of linear portions 196 facing each other and a pair of circular arc portions 197 facing each other corresponding to the shape of the connecting pin 190 .

As a result, the connecting portion P1 between the straight portion 196 and the circular arc portion 197 of the upper switching claw portion 120 is connected to the cut surface 191 and the circular arc surface 192 about the swing axis O9, which is the central axis of the connecting pin 190. It is swingable within the angle range where it contacts the portion P2.

The spring member 181 has a base end portion 181a connected to the central portion 121 of the upper switching claw portion 120 and extends clockwise from the base end portion 181a toward the tip portion 181b. A tip portion 181 b of the spring member 181 is fitted to a connecting pin 200 fixed to the rotating plate 62 .
Thereby, the spring member 181 urges the upper switching claw portion 120 so as to press the engaging portion 124 of the upper switching claw portion 120 against the switching tooth portion 102 by its own elastic restoring force.

Even with the switching transmission wheel 180 of this embodiment configured as described above, it is possible to achieve the same effects as those of the first embodiment.
In addition, in the case of this embodiment, since the upper switching pawl portion 120 and the spring member 181 are integrally formed, the number of parts can be reduced, and the weight and cost of the switching transmission wheel 180 can be reduced. It is possible to improve the efficiency and ease of assembly.

Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. Embodiments and modifications thereof include, for example, those that can be easily imagined by those skilled in the art, those that are substantially the same, and those within an equivalent range.

For example, in each of the above embodiments, the switching transmission wheel is used in an automatic winding mechanism. .
In particular, in each of the above-described embodiments, in order to adopt the automatic winding mechanism, a pair of switching wheels and switching claws are provided to provide an upper switching wheel, a lower switching wheel, an upper switching claw, and a lower switching claw. Although the switching transmission wheel is used, when it is used in a timepiece mechanism other than an automatic winding mechanism, it may be configured to have only one switching wheel and one switching pawl.

O2... Axis (third axis)
O8... Axis (first axis)
O9, O10... Swing axis (second axis)
1... Clock 10... Movement (movement for clock)
DESCRIPTION OF SYMBOLS 11... Self-winding mechanism 20... Square ratchet 30... Oscillating weight (power source)
60, 160, 170, 180... Switching transmission wheel 61... Switching wheel 65... Axle (rotating shaft portion)
62... Rotary plate 63... Switching pawl portion 73... Switching transmission pinion 100... Upper switching wheel (first switching wheel)
DESCRIPTION OF SYMBOLS 102, 112... Switching tooth part 102a, 112a... Engaging surface 102b, 112b... Inclined surface 110... Lower stage switching wheel (2nd switching wheel)
120... Upper switching claw portion (first switching claw portion)
122, 132... First switching arm portion (switching arm portion)
124, 134... Engagement portion 130... Lower stage switching claw portion (second switching claw portion)
140, 150, 161, 171, 181... Spring member 143, 153, 173... Degree contact part (limiting member)

Claims (8)

a rotary shaft portion rotatably disposed about a first axis and having a switching transmission pinion for transmitting power to the train wheel to be transmitted;
a switching wheel combined to be relatively rotatable with respect to the rotating shaft portion and rotated about the first axis by power transmitted from a power source;
a rotating plate integrally combined with the rotating shaft;
a switching pawl integrally combined with the rotating plate so as to be swingable around a second axis;
The switching wheel includes a plurality of switching tooth portions having an engaging surface facing one side in the circumferential direction and an inclined surface facing the other side in the circumferential direction rotating around the first axis,
The switching claw portion
a switching arm portion formed to extend from the second axis toward one side in the circumferential direction;
an engaging portion formed at a distal end portion of the switching arm portion and releasably engaged with the engaging surface from one side in the circumferential direction;
A switching transmission wheel, wherein the switching pawl is biased by a spring member so that the engaging portion is pressed against the engaging surface. In the switching transmission wheel according to claim 1,
The engaging portion is
When the switching wheel rotates about the first axis toward one side in the circumferential direction, the state of engagement with the engaging surface is maintained, and the switching wheel rotates toward the other side in the circumferential direction. A switching transmission wheel that is disengaged from the engaging surface by the inclined surface when rotated about the first axis. In the switching transmission wheel according to claim 1 or 2,
The rotating plate has
A switching transmission wheel is provided with a restricting member that restricts swinging of the switching pawl about the second axis when the engaging portion is disengaged from the engaging surface. In the switching transmission wheel according to any one of claims 1 to 3,
The switching transmission wheel, wherein the spring member is formed separately from the switching pawl portion and combined with the rotating plate. In the switching transmission wheel according to any one of claims 1 to 3,
The switching transmission wheel, wherein the spring member is formed integrally with the switching pawl and combined with the rotating plate. a switching transmission wheel according to any one of claims 1 to 5;
an oscillating weight that is rotatable in two directions about a third axis and functions as the power source;
a ratchet wheel for winding a mainspring and the transmitted train wheel for connecting the switching transmission pinion,
A pair of the switching wheel and the switching pawl are provided so as to be arranged on both sides of the rotating plate in the first axial direction,
Of the pair of switching wheels, the switching wheel located on the switching transmission pinion side of the rotating plate is a first switching wheel that rotates with the rotation of the oscillating weight,
The remaining switching wheel of the pair of switching wheels is a second switching wheel that rotates in a direction opposite to the first switching wheel as the oscillating weight rotates,
Of the pair of switching claws, the switching claw located on the switching transmission pinion side of the rotary plate is a first switching claw that operates in conjunction with the first switching wheel,
An automatic winding mechanism, wherein the remaining switching claw portion of the pair of switching claw portions is a second switching claw portion that operates in conjunction with the second switching wheel. A timepiece movement comprising the self-winding mechanism according to claim 6 . A timepiece comprising the timepiece movement according to claim 7 .

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