JP2015007539A - Display mechanism, clock movement, and clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display mechanism capable of drawing a complicated moving track of an instruction unit with a simple structure and improving designability, a clock movement equipped with the display mechanism, and a clock equipped with the clock movement.SOLUTION: A display mechanism comprises: an instruction unit 42 used for indication of the passage of time; and a control mechanism 50 that differentiates the travel speed of the instruction unit 42 as time passes. The control mechanism 50 includes a cam part 51 and a cam follower unit 55. The cam follower unit 55 includes: a lever 60 that is formed with a follower part 61 connecting to the cam part 51 and that rotates about the cam part 51 in a circumferential direction while oscillating in association with the rotation of the cam follower unit 55; and a pointer 41 whose one end is formed with the instruction part 42 and whose other end is rotatably supported about a second axis C2 and that rotates about the cam part 51 in a circumferential direction. The other end of the lever 60 and the other end of the pointer 41 are connected through a power transmission part formed by a pointer gear 43 and a lever gear 62.

Description

  The present invention relates to a display mechanism, a timepiece movement including the display mechanism, and a timepiece.

  A mechanical timepiece such as a wristwatch has a function as a decoration in addition to a function of displaying time. For this reason, conventionally, for example, a mechanical timepiece having a special display mechanism is known in order to improve the design of information such as time and day of the week using hands such as an hour hand, a minute hand, a second hand, and a day hand. ing.

For example, Patent Literature 1 discloses an analog display device (display mechanism) having a preselected path having an indicator of a value to be displayed attached to a rotating shaft, and the free end of the indicator is around the rotating shaft. An analog display device is described having a control device for an indicator configured to follow a preselected path with rotation.
The control device for the indicator includes a longitudinal groove that slides against two pins provided on a guide arm attached to a rotating shaft, and is guided by a pin provided on an arm connected to the guide arm. Including lateral grooves.

The movement trajectory of the needle on the dial is defined by the rotational speed of the arm with respect to the guide arm and the shape of each groove.
Specifically, the guide arm rotates once per hour and is attached to the hour hand of the timepiece. The arm is moved by the hour hand and is rotated twice per hour. Further, the plurality of pins are driven into the guide arm and the arm, the needle is installed on the guide arm and the arm, and the first groove is positioned by the pin of the guide arm, and is inserted into the second groove. Arm pins are arranged. Thus, by guiding the needle using the first groove, the needle rotates once per hour. The tip of the needle moves along the elliptical path by being moved in the radial direction by a pin driven into the arm while rotating in the circumferential direction.

JP 2005-17295 A

  However, in the prior art, the first groove shape is linear, and the needle rotates while moving along the radial direction at a predetermined cycle by the pin of the arm. Therefore, since the movement locus of the needle indicating portion is limited to a symmetrical shape with respect to the center of rotation of the guide arm, there remains a problem in that a complicated movement locus excellent in design is drawn. In general, when the movement locus of the needle pointing portion is complicated, the display mechanism tends to be complicated.

  In view of the above, an object of the present invention is to provide a display mechanism that can draw a complicated movement trajectory of the pointing unit with a simple structure and can improve the design, a movement for a timepiece including the display mechanism, and a timepiece.

  In order to solve the above-described problem, the display mechanism of the present invention includes an instruction unit used to indicate the passage of time, and a control mechanism that varies the moving speed of the instruction unit according to the passage of time. It is characterized by that.

  According to the present invention, since the control mechanism that varies the moving speed of the instruction section is provided, a complicated movement trajectory of the instruction section can be drawn with a simple structure, and the design of the display mechanism can be improved.

  The control mechanism includes a cam portion having a first axis as a central axis, and a cam follower unit that rotates in a circumferential direction of the cam portion, and the cam follower unit has the cam portion at one end. A follower portion that is in contact with the cam follower unit, and a lever that rotates in the circumferential direction around the cam portion while swinging with the rotation of the cam follower unit; A pointer that is rotatably supported around a second axis that is positioned radially outside the cam portion, and that rotates in the circumferential direction around the cam portion as the cam follower unit rotates; The other end of the lever and the other end of the pointer are connected to each other via a power transmission unit.

  According to the present invention, since the control mechanism is formed by the cam portion having the first axis as the central axis and the cam follower unit rotating in the circumferential direction of the cam portion, the number of parts is small. A simple structure can be obtained. Further, the cam follower unit is formed with a follower portion in contact with the cam portion at one end portion, and includes a lever that rotates in the circumferential direction around the cam portion while swinging as the cam follower unit rotates. Therefore, the amount of rocking of the lever can be set arbitrarily by changing the shape of the outer peripheral surface of the cam portion. In addition, the swinging speed of the lever can be arbitrarily set by changing the relative movement speed of the follower part with respect to the cam part. In addition, the pointer is supported so as to be rotatable around the second axis, and the other end of the lever and the other end of the pointer are connected via a power transmission unit. Corresponding to the amount of movement and the swinging speed, the pointer can rotate in the circumferential direction around the cam portion while rotating around the second axis. In this way, since the movement locus of the pointer pointing portion can be determined as desired by the shape of the outer peripheral surface of the cam portion and the relative movement speed of the follower portion with respect to the cam portion, a complicated movement locus of the pointing portion can be obtained with a simple structure. It can draw and can improve the design nature of a display mechanism.

  The power transmission unit is formed by a pointer gear formed at the other end of the pointer and a lever gear formed at the other end of the lever.

  According to the present invention, since the power transmission unit is formed by the pointer gear and the lever gear, it is further indicated by changing the ratio between the number of teeth of the pointer gear and the number of teeth of the lever gear that mesh with each other. A complicated movement trajectory of the part can be drawn, and the design of the display mechanism can be improved. In particular, by making the ratio of the number of teeth of the lever gear larger than the ratio of the number of teeth of the pointer gear, the amount of swinging of the pointer can be increased and the amount of swinging of the indicating portion can be increased. By making the ratio of the number of teeth smaller than the ratio of the number of teeth of the pointer gear, it is possible to reduce the swinging amount of the pointing unit when the pointer is rotated, thereby reducing the swinging amount of the pointing unit. Thus, in addition to the shape of the outer peripheral surface of the cam part and the relative movement speed of the follower part relative to the cam part, the ratio of the number of teeth of the pointer gear and the number of teeth of the lever gear is changed, thereby Since the movement locus can be determined as desired, a complicated movement locus of the pointing unit can be drawn with a simple structure, and the design of the display mechanism can be improved.

  Further, the cam portion includes a main cam surface formed so that a radius increases from one side to the other side in the circumferential direction, and the main cam surface includes the follower portion of the lever. It is characterized in that it is formed by a plurality of sub cam surfaces that approach and separate from one axis.

  According to the present invention, since the main cam surface is formed by a plurality of sub cam surfaces that move the follower portion of the lever toward and away from the first shaft, the lever shape can be changed by changing the shape of the sub cam surface. When the follower portion rotates around the cam portion in contact with the main cam surface of the cam portion, the swing amount of the lever can be adjusted. Therefore, for example, the movement locus of the instruction unit can be curved or linear, for example, and a desired movement locus can be drawn.

  The cam portion includes a groove portion formed so that a distance along the radial direction from the first shaft increases from one side to the other side in the circumferential direction, and the follower portion of the lever Is formed by a convex portion movable along the groove portion.

  According to the present invention, the cam portion can be formed easily and at low cost. Further, since the follower portion of the lever is formed by a convex portion that can move along the groove portion, the follower portion can move along the groove portion only by arranging the convex portion of the lever in the groove portion. Therefore, for example, since the urging member for urging the follower portion toward the cam portion is not required so that the follower portion is in contact with the cam portion, the display mechanism has a simpler structure and lower cost. Can be

  The cam portion and the cam follower unit rotate in the same direction from one side of the circumferential direction to the other side around the first axis, and the cam follower unit is faster than the cam portion. It is characterized by rotating.

  According to the present invention, the cam portion and the cam follower unit rotate in the same direction from one circumferential direction to the other side around the first axis, and the cam follower unit rotates at a higher speed than the cam portion. Therefore, the cam follower unit can be rotated relative to the cam portion. Further, the cam follower unit makes a plurality of turns around the cam part during one rotation of the cam part, so that the movement locus of the pointing part has a spiral shape having a number of turns corresponding to the number of turns of the cam follower unit. It can be. In this way, the number of revolutions of the spiral movement locus can be changed according to the rotational speed ratio between the cam portion and the cam follower unit, so that a complicated movement locus of the pointing portion can be drawn with a simple structure. The design of the display mechanism can be improved.

  The cam portion is attached to an hour wheel, and the rotational speed of the cam follower unit is twice the rotational speed of the cam portion.

  According to the present invention, since the cam portion is attached to the hour wheel that rotates once every 12 hours, it is possible to draw the movement trajectory of the instruction portion with 12 hours as one cycle. Therefore, it is suitable when the indicating unit is an hour hand. Further, since the rotational speed of the cam follower unit is twice the rotational speed of the cam portion, the number of turns of the spiral movement trajectory can be made twice.

In addition, a timepiece movement according to the present invention includes the above-described display mechanism.
The timepiece of the present invention is characterized by including the above-described timepiece movement.
According to the present invention, by providing the above-described display mechanism, it is possible to obtain a timepiece movement and a timepiece excellent in design, which can draw a complicated movement locus of the pointing unit with a simple structure.

  According to the present invention, since the control mechanism that varies the moving speed of the instruction section is provided, a complicated movement trajectory of the instruction section can be drawn with a simple structure, and the design of the display mechanism can be improved.

1 is an external view of a timepiece according to an embodiment. It is explanatory drawing when a movement is seen from the back side. It is sectional drawing of the movement shown in FIG. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 0:00. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 1 o'clock. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 2 o'clock. It is explanatory drawing of a display mechanism, and is explanatory drawing when displaying 3 o'clock. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 4 o'clock. It is explanatory drawing of a display mechanism, and is explanatory drawing when displaying 5:00. It is explanatory drawing of a display mechanism, and is explanatory drawing when displaying 6 o'clock. It is explanatory drawing of a display mechanism, and is explanatory drawing when displaying 7 o'clock. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 8:00. It is explanatory drawing of a display mechanism, and is explanatory drawing when displaying 9 o'clock. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 10:00. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 11:00. It is explanatory drawing of a display mechanism, Comprising: It is explanatory drawing when displaying 12:00. It is explanatory drawing of the display mechanism which concerns on the 1st modification of embodiment. It is explanatory drawing of the display mechanism which concerns on the 2nd modification of embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
In the following, first, a mechanical wristwatch (corresponding to “Clock” in claims) and a movement (corresponding to “Clock movement” in claims) incorporated in this wristwatch according to the embodiment will be described. Details of the mechanism will be described.

(clock)
In general, a machine body including a driving part of a timepiece is referred to as a “movement”. A state in which a dial and hands are attached to the movement, and put into a watch case to form a finished product, is referred to as “complete” of the watch. Of the two sides of the base plate constituting the watch substrate, the side of the watch case with the glass, that is, the side with the dial is referred to as the “back side” of the movement. Of the two sides of the main plate, the side of the watch case with the case back, that is, the side opposite to the dial is referred to as the “front side” of the movement.

FIG. 1 is an external view of a timepiece 1 according to the embodiment.
As shown in FIG. 1, the timepiece 1 according to the present embodiment includes a movement 10, a dial 11 indicating time information, and a minute in a timepiece case 3 made up of a case back cover and glass 2 (not shown). A minute hand 5 for indicating, a second hand 6 for indicating the second, and a pointer 41 having a function of an hour hand and including an instruction unit 42 for indicating the hour. The timepiece 1 of the present embodiment is a mechanical timepiece 1 provided with a special display mechanism 40 for improving the design, especially for displaying time information.

A winding stem 8 is rotatably incorporated in a winding stem guide hole (not shown) of the main plate 20. The winding stem 8 is, for example, a timepiece component used when correcting the date or correcting the time display (hour and minute display). A crown 9 located on the side of the watch case 3 is attached to one end of the winding stem 8.
The winding stem 8 is rotatably supported by the winding stem guide hole, and can be pulled out in, for example, two stages in the extending direction of the winding stem 8. At this time, the position of the winding stem 8 in the extending direction is determined by a switching device (not shown) such as a setting lever, a spring or a spring provided on the back side of the main plate 20.
In the following description, the rotation center of the minute hand 5 and the second hand 6 is defined as the first axis C1, the direction orthogonal to the axial direction of the first axis C1 is referred to as the radial direction, and the direction around the first axis C1 is defined as the circumferential direction. It is called direction. The upstream side in the clockwise direction is referred to as one side in the circumferential direction, and the downstream side is referred to as the other side in the circumferential direction. Further, when viewed from the axial direction, the axis passing through the first axis C1 and extending along the winding stem 8 is the X axis, the right side in FIG. 1 is the + X side, and the left side is the −X side. Further, the axis passing through the first axis C1 and orthogonal to the X direction is taken as the Y axis, the upper side in FIG. 1 is taken as + Y side, and the lower side is taken as -Y side. Hereinafter, description will be made using an XY orthogonal coordinate system as necessary.

The dial plate 11 is formed, for example, in a hexagonal shape as a whole, and at each corner portion of the main surface of the dial plate 11 is provided a scale 12 that represents information of minutes and seconds.
On the inner side in the radial direction from the scale 12 on the main surface of the dial 11, a display area 15 in which an index 13 composed of numbers from “0” to “12” indicating information on time is displayed (“display section of claims”) Is equivalent to.) In the display area 15, information corresponding to the index 13 is displayed from 0 am to 12:00 in the morning or afternoon.

  In the display area 15, indexes 13 from “0” to “12” are sequentially arranged in the clockwise direction along the circumferential direction. In the present embodiment, when viewed from the axial direction, “0” is displayed in the (+ X, + Y) region and at a position shifted by a predetermined angle in the clockwise direction with respect to the X axis. The indexes 13 after “0” are arranged in a spiral shape so that the distance from the first axis C1 gradually increases in the clockwise direction, and the index 13 of “12” is the most. It is arranged on the + Y axis outside the radial direction. Each number of the index 13 is arranged, for example, in a region where the dial 11 is recessed in a circular shape for the purpose of improving the design, and the numbers adjacent in the circumferential direction are connected by a straight line. It is displayed as it is.

The display area 15 is provided with a display mechanism 40 that includes an instruction unit 42 used to indicate the passage of time and a control mechanism 50 that varies the moving speed of the instruction unit 42 according to the passage of time. . The instruction unit 42 is configured to move the display area 15 by the control mechanism 50 and point to each index 13 from “0” to “12” indicating information about time. The display mechanism 40 including the instruction unit 42 and the control mechanism 50 will be described in detail later.
In the display area 15 of the dial plate 11, a date window 11 a that opens a number indicating the date is opened. Thereby, the timepiece 1 can check the date in addition to the time.

FIG. 2 is an explanatory diagram when the movement 10 shown in FIG. 1 is viewed from the back side (the dial plate 11 side). In FIG. 2, the dial 11 is shown in a transparent manner for easy understanding. In addition, numerals and lines displayed on the dial plate 11, a date window 11 a formed on the dial plate 11, and a date dial holder 29 are illustrated by two-dot chain lines. Also, illustration of the minute hand 5 and the second hand 6 (both see FIG. 1) is omitted.
FIG. 3 is a cross-sectional view of the movement 10 shown in FIG. In FIG. 3, with the inner surface of the dial plate 11 on the base plate 20 side as a boundary, the base plate 20 side of the dial plate 11 is a cross-sectional view along the line A-A1 in FIG. 11 is a cross-sectional view along the line A-A2 in FIG.

  As shown in FIG. 2, the movement 10 has a base plate 20 that constitutes a substrate of the movement 10. On the front side surface of the main plate 20, an unillustrated escapement and speed control mechanism including a balance, escape wheel, ankle, etc., and an unillustrated table including a fourth wheel, third wheel, second wheel and barrel wheel And at least a train wheel.

  As shown in FIG. 3, on the dial 11 side of the main plate 20, a reverse wheel train including a minute wheel 17, a minute wheel 18 and an hour wheel 21, a date wheel 30, a first date turning intermediate wheel 24, A second date turning intermediate wheel 25, a date turning wheel 26, a date feeding claw 27, and a date jumper 28 (see FIG. 2) are disposed at least. Further, on the back side of the main plate 20, the date on which the date wheel 30, the first date turning intermediate wheel 24, the second date turning intermediate wheel 25, the date turning wheel 26, the date feeding claw 27 and the date jumper 28 (see FIG. 2) are pressed. A vehicle presser 29 is attached. Further, on the back side of the date dial holder 29, the dial plate 11 is disposed so as to be visible through the glass 2 (see FIG. 1).

  The fourth wheel, the minute wheel 17 and the hour wheel 21 are arranged coaxially with respect to the first axis C1. Of these, the minute wheel 17 is configured to rotate once per hour through rotation of the second wheel and third wheel by rotation of the barrel wheel. The minute hand 5 is attached to the minute wheel 17. The fourth wheel is configured to rotate once per minute through the rotation of the second and third wheels. A second hand 6 is attached to a fourth stem 16 extending from the fourth wheel along the first axis C1.

  The hour wheel 21 is configured to rotate once every 12 hours through the rotation of the minute wheel 17 and the minute wheel 18. The hour wheel 21 has a small-diameter cylindrical portion 21a on the distal end side and a large-diameter cylindrical portion 21b on the proximal end side. A cam portion 51 constituting a control mechanism 50 (described later) is fitted and fixed to the small diameter cylindrical portion 21a. In addition, a unit gear 56 constituting a control mechanism 50 described later is externally inserted into the large-diameter cylindrical portion 21b.

  As shown in FIG. 2, the date wheel 30 is rotatably attached to the main plate 20 and is a ring-shaped member as a whole. The date wheel 30 has a plurality of internal teeth 30a formed along the inner periphery of the opening. On the main surface on the back side of the movement 10 in the date dial 30 (that is, the dial plate 11 side), date letters representing dates from the 1st to the 31st are displayed. In FIG. 2, only some of the date characters displayed on the date indicator 30 are illustrated.

As shown in FIG. 3, the driving force of the hour wheel 21 is generated by rotating the date driving wheel via the rotation of the first date turning intermediate wheel 24 and the second date turning intermediate wheel 25 that are rotatably attached to the main plate 20. 26.
The date indicator driving wheel 26 is a clock part that rotates the date indicator 30 once a day (when it reaches midnight) and rotates the date by one day. Based on the rotation of the vehicle 24 and the second date turning intermediate wheel 25, the vehicle 24 is rotated once in the counterclockwise direction in 24 hours. A date feeding claw 27 that can be engaged with the inner teeth 30 a of the date dial 30 is formed on the back side (the dial 11 side) of the date indicator driving wheel 26. When the date indicator driving wheel 26 is rotated counterclockwise, the date feeding claw 27 is engaged with the internal teeth 30 a of the date indicator 30. Thereby, the rotational force of the date indicator driving wheel 26 is transmitted to the inner teeth 30 a of the date indicator 30 via the date feeding claw 27. Then, the date indicator driving wheel 26 rotates the date indicator 30 counterclockwise by one day on the date per rotation.

  The first date turning intermediate wheel 24 is formed with a unit driving tooth portion 24a on the back side (dial plate 11 side) of the date dial holder 29. The unit driving tooth portion 24 a meshes with a unit gear 56 constituting a cam follower unit 55 described later, and increases the rotational speed of the unit gear 56 while transmitting the driving force of the hour wheel 21 to the unit gear 56. ing.

  As shown in FIG. 2, the date jumper 28 is a timepiece part that regulates the position of the date indicator 30 in the rotational direction, and has a base end portion fixed to the back side of the main plate 20 and a tip end portion that is a free end. A deformable date jumper spring portion 28a and an engagement portion 28b provided at the tip of the date jumper spring portion are provided. The engagement portion 28b of the date jumper 28 is urged toward the inner teeth 30a side of the date indicator 30 by the date jumper spring portion 28a and is formed to be engageable with the inner teeth 30a of the date indicator 30. The date jumper 28 regulates the rotation of the date dial 30 when the engaging portion 28 b engages with the internal teeth 30 a of the date dial 30.

(Display mechanism)
Next, the display mechanism 40 will be described in detail.
The display mechanism 40 includes an instruction unit 42 that is used to indicate time information and indicate the passage of time, and a control mechanism 50 that varies the moving speed of the instruction unit 42 according to the passage of time. The control mechanism 50 includes a cam portion 51 having the first axis C1 as a central axis, and a cam follower unit 55 that rotates in the circumferential direction of the cam portion 51.

  As shown in FIG. 3, the cam portion 51 is externally fitted and fixed to the small-diameter cylindrical portion 21a of the hour wheel 21 so that the first axis C1 becomes the central axis. The cam portion 51 is abutted against a step portion provided at the boundary between the small-diameter cylindrical portion 21 a and the large-diameter cylindrical portion 21 b of the hour wheel 21 and positioned in the axial direction, and the small-diameter cylindrical portion 21 a from the back side of the movement 10. The stopper seat 22 fitted on the outer side prevents the axial removal. The cam portion 51 rotates together with the hour wheel 21 in the clockwise direction around the first axis C <b> 1 at the rotation speed of one rotation in the same 12 hours as the hour wheel 21.

  As shown in FIG. 2, the outer peripheral surface of the cam portion 51 has a main cam surface 52 formed so that its radius increases in a spiral shape in the clockwise direction (from one side to the other side in the circumferential direction) The main cam surface 52 is formed by a step surface 54 connecting the position where the radius from the first axis C1 is minimum and the position where the radius is maximum.

  The main cam surface 52 is formed by a plurality of sub cam surfaces 53. Twelve sub cam surfaces 53 are provided side by side in the circumferential direction corresponding to the index 13 from 1 o'clock to 12 o'clock (0 o'clock). The plurality of sub cam surfaces 53 are each formed in a concave curved surface shape having a predetermined curvature as viewed from the axial direction. In the present embodiment, the curvatures of the plurality of sub cam surfaces 53 are formed so as to gradually change in the circumferential direction.

(Cam follower unit)
The cam follower unit 55 mainly includes a unit gear 56, an arm portion 58, a lever 60, and a pointer 41.
As shown in FIG. 3, the unit gear 56 is externally inserted into the large-diameter cylindrical portion 21 b of the hour wheel 21 via a pipe member 57. The unit gear 56 is rotatable relative to the hour wheel 21.
The end of the unit gear 56 on the ground plate 20 side is a unit tooth portion 56a. The unit tooth portion 56a meshes with the unit driving tooth portion 24a of the intermediate wheel 24 for the first date. As a result, the driving force of the hour wheel 21 is transmitted to the unit gear 56 via the unit driving tooth portion 24a, and the rotational speed is increased. In the present embodiment, the unit gear 56 is configured to rotate twice in 12 hours at a rotational speed twice that of the hour wheel 21.
The opposite side of the unit gear 56 from the unit tooth portion 56a is a cylindrical portion 56b.

  The arm portion 58 has an arm portion main body 58 a extending in the radial direction, and an inner end portion in the radial direction is externally fixed to the cylindrical portion 56 b of the unit gear 56. The arm portion 58 rotates together with the unit gear 56 in the clockwise direction around the first axis C <b> 1 at the rotation speed of 2 rotations in the same 12 hours as the unit gear 56.

A lever 60 is pivotally supported via a lever shaft member 59 attached to the arm portion 58 outside the intermediate portion in the radial direction of the arm portion 58.
As shown in FIG. 2, the lever 60 is formed so as to extend while being curved from the shaft support portion by the lever shaft member 59 toward the cam portion 51. A flange-like follower portion 61 that is in sliding contact with the main cam surface 52 and the sub cam surface 53 is formed at one end portion in the radial direction of the lever 60.

A lever gear 62 is formed at the other outer end portion of the lever 60 in the radial direction. The lever gear 62 is formed in a fan shape with the lever shaft member 59 as the center, and a plurality of teeth are formed on the outer peripheral surface.
In the lever 60, the follower portion 61 is always urged toward the cam portion 51 with a predetermined urging force via a pointer gear 43 by a return spring 46 provided on the pointer 41. The return spring 46 is, for example, a torsion coil spring.

A pointer 41 is pivotally supported around the second axis C <b> 2 via a pointer shaft member 44 attached to the arm portion 58 at an outer end portion in the radial direction of the arm portion 58.
The pointer 41 is formed so as to extend from the cylindrical portion 43 a of the pointer gear 43.
An instruction portion 42 is formed at one end of the pointer 41 opposite to the shaft support portion. The indicator 42 is formed in a ring shape and has an inner diameter that is larger than the outer shape of each numeral of the index 13. Thereby, each number of the index 13 can be displayed inside the indicator 42 formed in a ring shape.
A pointer gear 43 that meshes with the lever gear 62 is formed at the other end portion of the pointer 41 opposite to the instruction portion 42 and corresponding to the shaft support portion of the pointer 41. That is, the lever 60 and the pointer 41 are connected by the power transmission unit 35 formed by the lever gear 62 and the pointer gear 43.

The cam portion 51 and the cam follower unit 55 formed as described above have the first shaft as the hour wheel 21 rotates through the rotation of the barrel wheel (not shown), the minute wheel 17 and the minute wheel 18. It rotates around C1.
Specifically, the cam portion 51 rotates clockwise at a rotation speed of 1 rotation in 12 hours, and the cam follower unit 55 rotates clockwise at a rotation speed of 2 rotations in 12 hours. Then, the lever 60 of the cam follower unit 55 is slidably contacted with the main cam surface 52 and the sub cam surface 53 in a state where the follower portion 61 is biased by the cam portion 51, and together with the arm portion 58, Move clockwise around.

  At this time, since the plurality of sub cam surfaces 53 are formed in a concave curved surface shape, the follower portion 61 of the lever 60 approaches and separates from the first axis C <b> 1 along the plurality of sub cam surfaces 53. While moving around the cam portion 51. The lever 60 rotates around the cam portion 51 while swinging due to the movement of the follower portion 61 of the lever 60 as the cam follower unit 55 rotates.

  The power generated by the swing of the lever 60 is transmitted to the pointer 41 via the power transmission unit 35 formed by the lever gear 62 and the pointer gear 43. As a result, the pointer 41 rotates around the second axis C2 and rotates around the cam portion 51 in the clockwise direction. An index 13 consisting of is displayed.

Here, the swing amount of the lever 60 and the change amount of the swing speed in the present embodiment depend on the curved surface shape of the sub cam surface 53. Specifically, the greater the amount of displacement of the sub cam surface 53 in the radial direction, the greater the amount of swing of the lever 60 and the amount of change in speed.
Further, the swing amount of the pointer 41 depends on the ratio of the number of teeth of the pointer gear 43 and the number of teeth of the lever gear 62 in addition to the swing amount of the lever 60 (that is, the shape of the sub cam surface 53). Specifically, by increasing the ratio of the number of teeth of the lever gear 62 to the ratio of the number of teeth of the pointer gear 43, the amount of swing when the pointer 41 is rotated is increased, and the amount of swing of the indicating unit 42 is increased. By making the ratio of the number of teeth of the lever gear 62 smaller than the ratio of the number of teeth of the pointer gear 43, the amount of oscillation when the pointer 41 is rotated is reduced, and the amount of oscillation of the indicating portion 42 is reduced. can do.
In the present embodiment, when moving between the numbers of the index 13, the curved surface shape of the auxiliary cam surface 53, the number of teeth of the pointer gear 43, and the lever gear 62 are set so that the instruction unit 42 draws a linear movement locus. The ratio with the number of teeth is adjusted.

(Function)
4 to 16 are explanatory diagrams of the display mechanism 40 and are explanatory diagrams when a predetermined time is displayed. 4 to 16, illustration of the minute hand 5, second hand 6, return spring 46, etc. (see FIG. 1 for all) is omitted as appropriate.
Then, the effect | action of the display mechanism 40 of this embodiment is demonstrated. Hereinafter, the operation of the instruction unit 42 constituting the display mechanism 40 from the time of 0:00 until the operation ends after displaying the time of 12:00 will be described in order with reference to FIGS. explain.

  As shown in FIG. 4, in the initial state in which the instruction unit 42 displays the index 13 of “0” (that is, at time 0), the step surface 54 of the cam unit 51 is the initial position of the (−X, −Y) region. Placed in. Further, the arm portion 58 of the cam follower unit 55 is disposed at an initial position in the (−X, + Y) region. In addition, the follower portion 61 of the lever 60 in the cam follower unit 55 contacts the first sub cam surface 53 a that is adjacent to the step surface 54 and located on the innermost side in the radial direction among the plurality of sub cam surfaces 53. It touches.

  Next, with the passage of time, the cam portion 51 and the cam follower unit 55 rotate around the first axis C1. At this time, the cam portion 51 rotates in the clockwise direction at a rotation speed of 1 rotation in 12 hours, and the cam follower unit 55 is configured to rotate in the clockwise direction at a rotation speed of 2 rotations in 12 hours. ing. Therefore, the follower portion 61 of the cam follower unit 55 relatively rotates in the circumferential direction around the cam portion 51 and moves while slidingly contacting the first sub cam surface 53a.

At this time, the first sub cam surface 53a is formed in a concave curved surface shape. Therefore, the follower portion 61 moves around the cam portion 51 along the first sub cam surface 53a while approaching and separating from the first axis C1. Accordingly, the lever 60 rotates around the cam portion 51 while swinging due to the movement of the follower portion 61 of the lever 60 as the cam follower unit 55 rotates.
The power generated by the swing of the lever 60 is transmitted to the pointer 41 via the power transmission unit 35 formed by the lever gear 62 and the pointer gear 43. Thereby, the pointer 41 rotates around the cam portion 51 in the clockwise direction while rotating around the second axis C2. Here, in the present embodiment, the curved surface shape of the auxiliary cam surface 53, the number of teeth of the pointer gear 43, and the number of teeth of the lever gear 62 so that the instructing unit 42 draws a linear movement locus between the index 13 of each number. The ratio is adjusted. Therefore, the instruction unit 42 linearly moves between the indexes 13 of “0” and “1”.

  After that, as shown in FIG. 5, when the elapsed time from the start of the operation becomes 1 hour, the cam portion 51 rotates 30 ° clockwise from the initial position, and the step surface 54 becomes (−X, + Y ) Move to the area. Further, the arm portion 58 of the cam follower unit 55 rotates 60 ° clockwise from the initial position and moves to the (+ X, + Y) region. Further, the follower portion 61 of the lever 60 in the cam follower unit 55 abuts on a boundary portion between the first sub cam surface 53a and the second sub cam surface 53b. Then, the instruction unit 42 of the pointer 41 displays the index 13 of “1”.

The cam portion 51 and the cam follower unit 55 continue to operate in the same manner as described above with the passage of time. At this time, the follower 61 of the lever 60 moves while being in sliding contact with the main cam surface 52. Accordingly, the follower portion 61 of the lever 60 is disposed on the outer side in the radial direction with respect to the initial position where the follower portion 61 is in contact with the first sub cam surface 53a as time passes. As a result, the lever 60 is in a state of being rotated and moved clockwise from the initial position around the lever shaft member 59 with the passage of time.
In addition, the pointing portion 42 of the pointer 41 is moved outward in the radial direction from the initial position as the lever 60 rotates from the initial position. As a result, the pointing portion 42 of the pointer 41 moves outward in the radial direction while rotating in the clockwise direction while varying the moving speed, and thus spirals so that the distance from the first axis C1 gradually increases. The arranged indexes 13 after “1” can be displayed. 6, the instruction unit 42 has the index 13 of “2”, the instruction unit 42 has the index 13 of “3” in FIG. 7, the index unit 42 has the index 13 of “4” in FIG. The instruction unit 42 displays the index 13 of “5”.

  Then, as shown in FIG. 10, when the elapsed time from the start of the operation is 6 hours, the cam portion 51 rotates 180 ° clockwise from the initial position, and the step surface 54 becomes (+ X, + Y). Move to the area. Further, the arm portion 58 of the cam follower unit 55 rotates 360 ° in the clockwise direction from the initial position, and moves to the same position as the initial position in the (−X, + Y) region. Further, the follower portion 61 of the lever 60 in the cam follower unit 55 abuts on a boundary portion between the sixth sub cam surface 53c and the seventh sub cam surface 53d.

  The cam portion 51 and the cam follower unit 55 continue to rotate as time passes. Thereby, the instruction unit 42 displays the index 13 after “6”. 11, the instruction unit 42 has the index 13 of “7”, the instruction unit 42 has the index 13 of “8” in FIG. 12, the index unit 42 has the index 13 of “9” in FIG. 13, and FIG. The instruction unit 42 displays the index 13 of “10”, and in FIG. 15, the instruction unit 42 displays the index 13 of “11”.

  Next, as shown in FIG. 16, when the elapsed time from the start of operation becomes 12 hours, the follower portion 61 of the lever 60 is a boundary portion between the main cam surface 52 and the step surface 54, and the first shaft It arrange | positions in the position most separated on the outer side of radial direction from C1. At this time, the lever 60 is rotationally moved at a maximum angle in the clockwise direction from the initial position around the lever shaft member 59. Then, the instruction unit 42 of the pointer 41 can be moved to the outermost side in the radial direction in accordance with the rotational movement of the lever 60 to display the index 13 of “12”.

Next, when 12 hours have elapsed from the start of the operation, the follower portion 61 of the lever 60 moves inward in the radial direction along the step surface 54, and as shown in FIG. 1 on the secondary cam surface 53a. The lever 60 rotates counterclockwise around the lever shaft member 59 as the follower 61 moves. Then, the instruction unit 42 of the pointer 41 is moved to the innermost side in the radial direction with the rotation of the lever 60, so that the index 13 of “0” can be displayed again.
Thereafter, by repeating the above-described operation, the instruction unit 42 can repeatedly display the index 13 from “0” to “12” while drawing a complicated movement locus.

  According to this embodiment, since the control mechanism 50 that varies the moving speed of the instruction unit 42 is provided, a complicated movement locus of the instruction unit can be drawn with a simple structure, and the design of the display mechanism 40 is improved. it can.

  Further, since the control mechanism 50 is formed by the cam portion 51 having the first axis C1 as the central axis and the cam follower unit 55 that rotates in the circumferential direction of the cam portion 51, the number of parts is increased. And a simple structure with less. Further, the cam follower unit 55 is formed with a follower portion 61 that is in contact with the cam portion 51 at one end, and is provided with a lever 60 that rotates in the circumferential direction around the cam portion 51 while swinging with rotation. Therefore, the swing amount of the lever 60 can be arbitrarily set by changing the shape of the outer peripheral surface of the cam portion 51. Further, the swing speed of the lever 60 can be arbitrarily set by changing the relative movement speed of the follower section 61 with respect to the cam section 51. The pointer 41 is supported so as to be rotatable about the second axis C <b> 2, and a power transmission unit in which the other end of the lever 60 and the other end of the pointer 41 are formed by the lever gear 62 and the pointer gear 43. 35, so that the pointer 41 rotates around the second axis C2 in the circumferential direction while rotating around the second axis C2 in accordance with the set swing amount and swing speed of the lever 60. Can rotate. As described above, the movement trajectory of the pointing portion 42 of the pointer 41 can be determined as desired based on the shape of the outer peripheral surface of the cam portion 51 and the relative movement speed of the follower portion 61 with respect to the cam portion 51, so that the pointing portion 42 has a simple structure. Thus, it is possible to draw a complicated movement trajectory and improve the design of the display mechanism 40.

  Further, since the power transmission unit 35 is formed by the pointer gear 43 and the lever gear 62, it is further instructed by changing the ratio of the number of teeth of the pointer gear 43 and the number of teeth of the lever gear 62 that mesh with each other. The complicated movement locus of the part 42 can be drawn, and the design of the display mechanism 40 can be improved. In particular, by making the ratio of the number of teeth of the lever gear 62 greater than the ratio of the number of teeth of the pointer gear 43, the amount of oscillation of the pointer 41 can be increased and the amount of oscillation of the indicating portion 42 can be increased. In addition, by making the ratio of the number of teeth of the lever gear 62 smaller than the ratio of the number of teeth of the pointer gear 43, the amount of swinging of the pointer 41 can be reduced and the amount of swinging of the indicating portion 42 can be reduced. it can. As described above, by changing the ratio of the number of teeth of the pointer gear 43 and the number of teeth of the lever gear 62 in addition to the shape of the outer peripheral surface of the cam portion 51 and the relative movement speed of the follower portion 61 with respect to the cam portion 51. Since the movement locus of the instruction unit 42 of the pointer 41 can be determined as desired, a complicated movement locus of the instruction unit 42 can be drawn with a simple structure, and the design of the display mechanism 40 can be improved.

  Further, since the main cam surface 52 is formed by a plurality of sub cam surfaces 53 that move the follower portion 61 of the lever 60 close to and away from the first axis C1, the shape of the sub cam surface 53 can be changed. When the follower portion 61 of the lever 60 is rotated around the cam portion 51 with the follower portion 61 in contact with the main cam surface 52 of the cam portion 51, the swing amount of the lever 60 can be adjusted. Therefore, for example, the movement trajectory of the instruction unit 42 can be, for example, curved or linear, so that a desired movement trajectory can be drawn.

  Further, the cam portion 51 and the cam follower unit 55 rotate in the same direction from one circumferential side to the other side around the first axis C1, and the cam follower unit 55 rotates at a higher speed than the cam portion 51. Therefore, the cam follower unit 55 can be rotated relative to the cam portion 51. Further, the cam follower unit 55 makes a plurality of rounds around the cam portion 51 while the cam portion 51 makes one rotation, so that the movement locus of the instruction portion 42 can be changed to a circumference corresponding to the number of turns of the cam follower unit 55. It can be a spiral with a number of times. In this way, the number of turns of the spiral movement locus can be changed in accordance with the rotation speed ratio between the cam portion 51 and the cam follower unit 55, so that a complicated movement locus of the indicating portion 42 is drawn with a simple structure. The design of the display mechanism 40 can be improved.

  Moreover, since the cam part 51 is attached to the hour wheel 21 that rotates once every 12 hours, the movement locus of the instruction part 42 with 12 hours as one cycle can be drawn. Therefore, it is suitable when the indicating unit 42 is used as an hour hand. Further, since the rotation speed of the cam follower unit 55 is twice the rotation speed of the cam portion 51, the number of times of the spiral movement trajectory can be set to two.

  In addition, by providing the display mechanism 40 described above, it is possible to obtain the movement 10 and the timepiece 1 that are capable of drawing a complicated movement locus of the instruction unit 42 with a simple structure and excellent in design.

(First Modification of Embodiment)
Subsequently, a display mechanism 40 according to a first modification of the embodiment will be described.
FIG. 17 is an explanatory diagram of a display mechanism 40 according to a first modification of the embodiment.
In the display mechanism 40 of the embodiment, the cam portion 51 includes a main cam surface 52, a plurality of sub cam surfaces 53, and a step surface 54, and the follower portion 61 includes the main cam surface 52 and the plurality of sub cams. It moved while sliding on the surface 53 (see FIG. 1).
On the other hand, as shown in FIG. 17, in the display mechanism 40 according to the first modification of the embodiment, the cam portion 151 includes a main cam groove portion 152, a plurality of sub cam groove portions 153, and a step groove portion 154. The follower portion 161 is different from the embodiment in that the follower portion 161 moves along the main cam groove portion 152, the plurality of sub cam groove portions 153, and the step groove portion 154. In addition, below, description is abbreviate | omitted about the component similar to embodiment, and only a different part is demonstrated.

  For example, the main cam groove 152 has a radial distance from the first axis C1 in the clockwise direction (from one side of the circumferential direction to the other side) on the main surface of the disk-shaped disk member. It is formed in a spiral shape. The main cam groove portion 152 is formed by connecting a plurality (12) of sub cam groove portions 153 that are curved inward in the radial direction in the circumferential direction. The step groove portion 154 is formed by connecting a position where the radius from the first axis C1 in the main cam groove portion 152 is minimum and a position where the radius is maximum.

  The follower portion 161 of the lever 60 is formed by a convex portion 161 a that can move along the main cam groove portion 152 and the sub cam groove portion 153. The convex portion 161a is formed to protrude from the radially inner end of the lever 60 toward the cam portion 151 along the axial direction, for example. By disposing the convex portion 161a in the main cam groove portion 152, the cam portion 151 rotates clockwise at a rotation speed of 1 rotation in 12 hours, and the cam follower unit 55 rotates at a rotation speed of 2 rotations in 12 hours. When rotated in the clockwise direction, the follower portion 161 can move along the main cam groove portion 152 and the plurality of sub cam groove portions 153. Thereby, the instruction unit 42 of the pointer 41 can display the index 13 by operating in the same manner as in the embodiment.

  According to the first modification of the embodiment, the cam portion 151 can be formed easily and at low cost. The follower portion 161 of the lever 60 is formed by a convex portion 161a that can move along the main cam groove portion 152, the sub cam groove portion 153, and the step groove portion 154, so that the main cam groove portion 152, the sub cam groove portion 153, and The follower portion 161 can be moved along the main cam groove portion 152, the sub cam groove portion 153, and the step groove portion 154 only by arranging the convex portion 161 a of the lever 60 in any one of the step groove portions 154. Therefore, for example, a biasing member for biasing the follower 161 toward the cam 151 so that the follower 161 contacts the cam 151 (for example, the return spring 46 in the embodiment, see FIG. 1). Therefore, the display mechanism 40 can have a simpler structure and cost can be reduced.

(Second Modification of Embodiment)
Subsequently, a display mechanism 40 according to a second modification of the embodiment will be described.
FIG. 18 is an explanatory diagram of a display mechanism 40 according to a second modification of the embodiment.
In the display mechanism 40 according to the embodiment, the outer peripheral surface of the cam portion 51 is a main cam surface formed such that a plurality of concave curved sub cam surfaces 53 are arranged side by side in the circumferential direction so that the radius increases in a spiral shape. 52 and a stepped surface 54 connecting the position where the radius from the first axis C1 is the minimum and the position where the radius is the maximum (see FIG. 1).
On the other hand, as shown in FIG. 18, the display mechanism 40 according to the second modified example of the embodiment has a main portion in which the outer peripheral surface of the cam portion 251 includes two sub-cam surfaces 253a and 253b having convex curved surfaces. This is different from the embodiment in that the cam surface 252 is formed. In addition, below, description is abbreviate | omitted about the component similar to embodiment, and only a different part is demonstrated.

  The main cam surface 252 of the cam portion 251 is formed in a heart shape when viewed from the axial direction by two sub-cam surfaces 253a and 253b having convex curved surfaces. Of the boundary portions of the two sub cam surfaces 253a and 253b, one boundary portion is the innermost 254a having the smallest separation distance from the first axis C1, and the other boundary portion is from the first axis C1. The outermost part 254b has the largest separation distance. In FIG. 18, the innermost 254a is disposed in the (+ X, + Y) region, and the outermost 254b is disposed in the (−X, −Y) region. Further, the follower 61 of the lever 60 is located on the outermost part 254b of the main cam surface 252 and is disposed at a position farthest radially outward from the first axis C1. At this time, the instruction unit 42 of the pointer 41 is moved to the outermost side in the radial direction along with the rotational movement of the lever 60 to display the index 13 of “12”.

  In the display area 15, indexes 13 from “1” to “12” are sequentially arranged in the clockwise direction along the circumferential direction. In this embodiment, when viewed from the axial direction, an index 13 of “1” is displayed in a (+ X, + Y) region at a position shifted by a predetermined angle in the clockwise direction with respect to the X axis. In addition, the indexes 13 from “1” to “6” are arranged side by side so that the distance from the first axis C1 becomes gradually smaller in the clockwise direction. Further, the indexes 13 from “7” to “12” are arranged side by side so that the distance from the first axis C1 gradually increases in the clockwise direction. Note that the indexes 13 of “3” and “9” are displayed at the same position.

(Operation of the display mechanism according to the second modification of the embodiment)
Next, the operation of the display mechanism 40 according to the second modification example of the present embodiment will be described. Hereinafter, the operation of the instruction unit 42 configuring the display mechanism 40 from the time 12:00 until the time 12:00 is displayed again and the operation is finished will be described in order.

  In the initial state where the instruction unit 42 displays the index 13 of “12” (that is, the time 12:00 or 0 o'clock), the outermost part 254b of the cam unit 251 is disposed at the initial position of the (−X, −Y) region. . Further, the arm portion 58 of the cam follower unit 55 is disposed at an initial position in the (−X, + Y) region. Further, the follower portion 61 of the lever 60 in the cam follower unit 55 is a (−X, −Y) region and is in contact with the outermost part 254 b of the main cam surface 252.

  As time elapses, the cam portion 251 and the cam follower unit 55 rotate around the first axis C1. At this time, the cam portion 251 rotates in the clockwise direction at a rotation speed of 1 rotation in 12 hours, and the cam follower unit 55 is configured to rotate in the clockwise direction at a rotation speed of 2 rotations in 12 hours. ing. Therefore, the follower portion 61 of the cam follower unit 55 rotates relatively in the circumferential direction of the cam portion 251 and moves toward the innermost portion 254a while being in sliding contact with the first sub cam surface 253a.

Here, the first sub cam surface 253a is formed such that the distance from the first axis C1 gradually decreases from the outermost part 254b toward the innermost part 254a. Therefore, the follower portion 61 moves around the cam portion 251 along the first sub cam surface 253a while gradually approaching the first axis C1. Accordingly, the lever 60 rotates around the cam portion 251 while swinging due to the movement of the follower portion 61 of the lever 60 as the cam follower unit 55 rotates. At this time, the instruction unit 42 gradually moves inward in the radial direction while rotating clockwise.
The power generated by the swing of the lever 60 is transmitted to the pointer 41 via the power transmission unit 35 formed by the lever gear 62 and the pointer gear 43. Accordingly, the pointer 41 rotates around the cam portion 251 in the clockwise direction while rotating around the second axis C2. Here, in the present embodiment, the curved surface shape of the sub cam surfaces 253a and 253b, the number of teeth of the pointer gear 43, and the lever gear so that the instruction unit 42 draws a smooth arc-shaped movement locus between the index 13 of each number. The ratio with the number of teeth of 62 is adjusted. Therefore, the instruction unit 42 of the pointer 41 moves in an arc shape between the indexes 13 of “12” and “1”.

The instruction unit 42 displays the index 13 after “1” while moving inward in the radial direction while rotating clockwise as time passes.
Then, when the elapsed time from the start of the operation is 6 hours, the cam portion 251 rotates 180 ° clockwise from the initial position, and the innermost 254a is the (−X, −Y) region, It moves to a position corresponding to the initial position of the outermost part 254b. Further, the arm portion 58 of the cam follower unit 55 rotates 360 ° in the clockwise direction from the initial position, and moves to the same position as the initial position in the (−X, + Y) region. Further, the follower portion 61 of the lever 60 in the cam follower unit 55 abuts on the innermost 254a. At this time, the follower portion 61 of the lever 60 is disposed at a position closest to the inside in the radial direction from the first axis C1. Accordingly, the instruction unit 42 is moved most inward in the radial direction with the rotation of the lever 60 and displays the index 13 of “6”.

  After 6 hours have elapsed from the start of operation, the follower portion 61 of the cam follower unit 55 rotates relative to the circumferential direction of the cam portion 251 with the passage of time, and moves to the second sub cam surface 253b. It moves toward the outermost part 254b while making sliding contact. At this time, the instruction unit 42 displays the index 13 after “6” while moving in the radial direction while rotating clockwise as time passes.

When the elapsed time from the start of the operation becomes 12 hours, the cam portion 251 rotates once, the cam follower unit 55 rotates twice, and the follower portion 61 of the lever 60 again moves to the main cam surface 252. Is located on the outermost 254b. At this time, the instruction unit 42 of the pointer 41 is moved to the outermost side in the radial direction in accordance with the rotational movement of the lever 60 and displays the index 13 of “12” again.
Thereafter, by repeating the above operation, the instructing unit 42 can display the index 13 from “1” to “12” while drawing a more complicated movement locus different from the embodiment.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the display mechanism 40 according to the embodiment and each modification of the embodiment, the cam portions 51, 151, and 251 rotate clockwise at a rotation speed of one rotation every 12 hours, and the cam follower unit 55 is rotated two times every 12 hours. Although it is configured to rotate in the clockwise direction at the rotational speed of rotation, the rotational speeds of the cam portion 51 and the cam follower unit 55 are not limited to this. For example, the cam portions 51, 151, and 251 rotate clockwise at a rotation speed of 1 rotation in 12 hours, and the cam follower unit 55 rotates clockwise at a rotation speed of 3 rotations in 12 hours. It may be configured. In this case, the movement trajectory of the instruction unit 42 can be drawn so as to go around the first axis C1 three times. Thus, by changing the rotational speeds of the cam portions 51, 151, 251 and the cam follower unit 55 in various ways, the movement trajectory of the instruction portion 42 can be formed in a desired shape.

  In the display mechanism 40 of the embodiment, the sub cam surface 53 is formed in a concave curved surface shape having a predetermined curvature when viewed from the axial direction, but the shape of the sub cam surface 53 is not limited to the embodiment. For example, the sub cam surface 53 may be formed in a convex curved surface shape having a predetermined curvature as viewed from the axial direction, may be formed to be bent, or may be formed in a flat shape. Good. Further, the plurality of sub cam surfaces 53 may be formed to have different shapes. In this way, by changing the shape of the sub cam surface 53 in various ways, the movement locus of the instruction unit 42 can be changed to a desired shape.

  In the display mechanism 40 according to the embodiment and each modification of the embodiment, the power transmission unit 35 that transmits the power of the lever 60 to the pointer 41 is formed by the lever gear 62 and the pointer gear 43. The form is not limited to the embodiment and each modification of the embodiment. For example, the power transmission unit 35 may be formed by connecting the lever 60 and the pointer 41 with a belt and a pulley.

  In the display mechanism 40 according to the embodiment and each modification of the embodiment, the instruction unit 42 is formed in a ring shape, and each number of the index 13 is displayed inside the instruction unit 42. Are not limited to the embodiments and the modifications of the embodiments, and can be changed to various shapes. Therefore, for example, the shape of the instruction unit 42 may be a needle shape.

  In the display mechanism 40 according to the embodiment and each modification of the embodiment, the cam portions 51, 151, 251 and the cam follower unit 55 are rotated with the first axis C1 as a common rotation center axis. , 151 and 251 and the rotation center axis of the cam follower unit 55 do not have to be coaxial.

The display form of the index 13 on the dial 11 is not limited to the embodiment and each modification of the embodiment, and various changes can be made.
In the display mechanism 40 according to the embodiment and each modification of the embodiment, the pointer 41 has the function of an hour hand, and the instruction unit 42 indicates the hour. On the other hand, the pointer 41 may have the function of the second hand and the instruction unit 42 may indicate the second, or the pointer 41 may have the function of the minute hand and the instruction unit 42 may indicate the minute. Alternatively, the pointer 41 may have a day hand function, and the instruction unit 42 may indicate the day of the week. That is, the display mechanism 40 is not limited to a mode for displaying time information.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Timepiece 10 ... Movement (timepiece movement) 15 ... Display area (display part) 21 ... Hour wheel 35 ... Power transmission part 40 ... Display mechanism 41 ... Pointer 42 ... Indicating part 43 ... Pointer gear 50 ... Control mechanism 51,151,251 ... Cam part 52,252 ... Main cam surface 53,253a, 253b ... Sub cam surface 55・ Cam follower unit 60 ... lever 61,161 ... follower 62 ... lever gear 152 ... main cam groove (groove) 153 ... sub cam groove (groove) 161a ... convex Part C1 ... 1st axis C2 ... 2nd axis

Claims (9)

An indicator used to indicate the passage of time;
A control mechanism that varies the moving speed of the instruction unit according to the passage of time;
A display mechanism comprising: The control mechanism is
A cam portion having a first axis as a central axis;
A cam follower unit that rotates in a circumferential direction of the cam portion;
With
The cam follower unit is
A follower portion that is in contact with the cam portion is formed at one end portion, and a lever that rotates in the circumferential direction around the cam portion while swinging with the rotation of the cam follower unit;
The indicator portion is formed at one end portion, and the other end portion is supported so as to be rotatable around a second axis positioned on the outer side in the radial direction of the cam portion. A pointer that rotates in the circumferential direction around
With
The display mechanism according to claim 1, wherein the other end of the lever and the other end of the pointer are connected via a power transmission unit. The power transmission unit is
A pointer gear formed on the other end of the pointer;
A lever gear formed on the other end of the lever;
The display mechanism according to claim 2, wherein the display mechanism is formed by: The cam portion includes a main cam surface formed so that a radius increases from one side to the other side in the circumferential direction,
The display mechanism according to claim 2, wherein the main cam surface is formed by a plurality of sub cam surfaces that move the follower portion of the lever toward and away from the first shaft. The cam portion includes a groove portion formed so that a distance along the radial direction from the first shaft increases from one side to the other side in the circumferential direction,
The display mechanism according to claim 2, wherein the follower portion of the lever is formed by a convex portion movable along the groove portion. The cam portion and the cam follower unit rotate in the same direction from one side of the circumferential direction to the other side around the first axis,
The display mechanism according to claim 4, wherein the cam follower unit rotates at a higher speed than the cam portion. The cam portion is attached to the hour wheel,
The display mechanism according to claim 6, wherein a rotation speed of the cam follower unit is twice a rotation speed of the cam portion.   A timepiece movement comprising the display mechanism according to claim 1.   A timepiece comprising the timepiece movement according to claim 8.

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