JP6032676B2 - Balance, watch movement and watch - Google Patents

Description

  The present invention relates to a balance, a movement for a timepiece including the balance, and a timepiece.

  The mechanical timepiece includes an escapement and speed control mechanism for controlling the rotation of the barrel wheel, the second wheel, the third wheel, and the fourth wheel constituting the front train wheel. A typical escapement and speed control mechanism is formed by an escape wheel, an ankle, and a balance. The balance with the balance spring, the balance spring that is the center of rotation of the balance wheel, the spiral spring that is formed in a spiral shape along the Archimedes curve, and the balance spring that rotates the balance wheel back and forth at a predetermined vibration cycle by expansion and contraction. And a whisker ball that securely fixes the lens. Since the fluctuation of the balance of the balance with the balance relates to the accuracy of the timepiece, it is important that the balance is set within a predetermined value.

FIG. 23 is a graph showing the effect of escapement error on the rate when the vertical axis is the rate (seconds / day) and the horizontal axis is the balance angle (°) of the balance.
The escapement error is known as a factor of the error of the balance of the balance with hairspring. Due to the escapement error, the rate varies according to the swing angle of the balance. Specifically, as shown in FIG. 23, the rate decreases as the swing angle of the balance with hairspring decreases due to a decrease in the torque of the mainspring which is the power source of the front train wheel. In particular, it is known that when the swing angle of the balance with hairspring is 200 ° or less, the rate is significantly reduced.

  By the way, Patent Document 1 describes a whisk that supports an outer end portion of a hairspring so as to be slidable outward in the radial direction. Further, Non-Patent Document 1 discloses that a balance of a balance spring is slid by moving the outer end of a balance spring in a state where the central axis of the Archimedes curve and the central axis of the balance are eccentric to the outside in the radial direction. It is described that the rate characteristic with respect to the corner can be changed.

FIG. 24 is a graph showing the rate characteristics due to the eccentricity of the hairspring and the sliding movement of the outer end when the vertical axis is the rate (seconds / day) and the horizontal axis is the balance angle (°) of the balance. In FIG. 24, the solid line indicates the rate characteristic when the center of the hairspring is decentered in the direction of the outer end and the outer end of the hairspring is fixed at a predetermined position, and the alternate long and short dash line indicates the hairspring. The center of the shaft is decentered in the direction of the outer end portion and the outer end portion of the balance spring is slid from the predetermined position to the outside in the radial direction by a predetermined distance and fixed, and the two-dot chain line indicates The rate characteristic is shown when the center of the hairspring is eccentrically arranged in the direction of the outer end and the outer end of the hairspring is slid from the predetermined position to the inside in the radial direction by a predetermined distance and fixed.
As shown in FIG. 24, the center of the hairspring is eccentrically arranged in the direction of the outer end portion, and the outer end portion of the hairspring is slid and fixed outward in the radial direction so that the swing angle is about 220 °. It can be adjusted to increase the rate in the following range.

  FIG. 25 is a graph showing adjustment of the rate when the vertical axis is the rate (seconds / day) and the horizontal axis is the swing angle (°) of the balance. In FIG. 25, the solid line indicates the adjusted rate characteristic, and the alternate long and short dash line indicates that the center of the hairspring is decentered in the direction of the outer end and the outer end of the hairspring is moved from the predetermined position in the radial direction. The rate characteristic in the case where it is slid and fixed outward by a predetermined distance is shown, and the two-dot chain line shows the rate characteristic before adjustment (corresponding to the rate characteristic in FIG. 23).

  As shown in FIG. 25, the center of the hairspring is eccentrically arranged in the direction of the outer end portion, and the outer end portion of the hairspring is slid from the predetermined position to the outside in the radial direction by a predetermined distance to be fixed, Since the rate can be increased in a range where the swing angle is about 220 ° or less, a decrease in the rate due to a decrease in the swing angle of the balance with hairspring can be suppressed. In particular, the rate decreases significantly due to the influence of the escapement error. In the range where the swing angle of the balance is 200 ° or less, the decrease in the rate due to the effect of the escapement error is effectively suppressed, and a wide range of swing angles (see FIG. 25, a stable rate characteristic with little variation over 150 ° to 300 ° can be obtained.

  Thus, according to the prior art, the balance spring is arranged eccentrically in the outer end direction with respect to the central axis of the balance, and the outer end portion of the balance spring is slid and fixed radially outward. Or by displacing the hairspring in the direction opposite to the outer end, and sliding the outer end of the hairspring inward in the radial direction to fix it. It is considered that a stable rate characteristic can be obtained over a wide range of the swing angle of the balance with suppressing the decrease.

US Pat. No. 7,648,265

Kojiro Oshima, “On the Isochronism of Temp Watch”, 1957, Journal of the Japan Watch Association (1), p. 3-p. 17

  However, in the prior art, it is necessary to decenter the central axis of the Archimedes curve of the balance spring and the central axis of the balance spring, and the outer end portion of the balance spring corresponds to the direction and amount of eccentricity. It is necessary to adjust the rate by shifting. However, since the center axis of the hairspring is an imaginary axis, a special measuring instrument is required to measure the eccentric direction and amount of the balance spring, and a method for measuring the eccentric direction and amount of the balance spring. And the calculation method is complicated. Therefore, as in the prior art, adjusting the rate by displacing the outer end portion in accordance with the direction and amount of eccentricity of the hairspring is very complicated and there is room for improvement.

  Therefore, the present invention includes a balance that can easily adjust the rate to reduce the escapement error and can obtain stable rate characteristics, a timepiece movement including the balance, and a timepiece movement. The challenge is to provide a watch.

  In order to solve the above-mentioned problems, the balance of the present invention is arranged so as to be rotatable with respect to the support member, and is formed so that the balance wheel is fitted and fixed along the Archimedes curve. Is connected to the spring and has an outer end connected to the support member, and when the inner peripheral surface of the spring is extended in the axial direction of the spring, Among these, at least a part is formed so as to intersect with the central axis of the balance.

  According to the present invention, when the inner peripheral surface of the hairspring is extended in the true axial direction, at least a part of the inner peripheral surface intersects with the central axis of the spring. At least a portion of the mainspring can be disposed inclined with respect to the central axis of the spring. Here, it was confirmed that when at least a part of the hairspring is inclined with respect to the central axis of the balance, the rate can be increased within the range of the balance of the balance with which the rate significantly decreases due to the effect of the escapement error. . Accordingly, by disposing at least a part of the hairspring with respect to the true central axis, it is possible to suppress a decrease in the rate due to the influence of the escapement error. Further, since the center axis of the hairspring is a virtual axis, it has been difficult to measure the direction and amount of eccentricity of the hairspring in the prior art. In contrast, since the inclination angle of the hairspring can be easily measured, the inclination angle of the hairspring can be easily adjusted. Therefore, according to the balance with the present invention, the rate can be easily adjusted to reduce the escapement error, and a stable rate characteristic can be obtained.

  Further, the inner end portion of the hairspring is connected to the spring via a whisker ball that is externally fitted and fixed to the spring, and the inner end portion, the spring, and the hairspring of the hairspring. When the inner circumferential surface of the hairspring is extended in the axial direction on at least one of the balls, the hairspring is so arranged that at least a part of the inner circumferential surface intersects the central axis of the balance spring. An inner end inclined arrangement structure for arranging the inner end is provided.

  According to the present invention, at least one of the inner end portion of the hairspring, the balance spring, and the ball is at least one part of the inner peripheral surface of the hairspring so that it intersects the central axis of the hairspring. Since the inner end portion inclined arrangement structure for arranging the inner end portion is provided, at least a part of the balance spring can be reliably inclined with respect to the central axis of the balance. Thereby, the fall of the rate by the influence of an escapement error can be suppressed. In addition, since the inner end inclined arrangement structure is provided in at least one of the inner end portion of the hairspring, the balance stem, and the hair ball, the shape of the member provided with the inner end inclined arrangement structure is changed. Thus, the inclination angle of the hairspring can be easily set to an arbitrary inclination angle.

  In addition, the inner end inclined arrangement structure is configured so that, when the inner end fixing surface fixed to the whistle ball is extended in the axial direction among the inner peripheral surfaces of the hairspring, the central axis of the balance spring The inner end portion of the hairspring is arranged so as to intersect.

  ADVANTAGE OF THE INVENTION According to this invention, the inner end fixed surface fixed to a beard ball among the inner peripheral surfaces of a hairspring can be inclinedly arranged with respect to the central axis of the balance. Here, by placing the inner end fixing surface of the hairspring inclining with respect to the central axis of the balance, the rate can be increased in the range of the balance of the balance with which the rate is significantly reduced due to the effect of the escapement error. confirmed. Therefore, the lowering of the rate due to the influence of the escapement error can be suppressed by arranging the inner end fixing surface of the hairspring to be inclined with respect to the central axis of the spring.

  Further, the outer end portion of the hairspring is connected to the support member via a whisker and a whisker holder that supports the whisker, and the outer end portion of the hairspring, the beard, and the whisker When the inner peripheral surface of the hairspring is extended in the axial direction in at least one of the receivers, the hairspring is so configured that at least a part of the inner peripheral surface intersects the central axis of the balance spring. The outer end inclined arrangement structure for arranging the outer end is provided.

  According to the present invention, the hairspring is such that at least one of the inner peripheral surface of the hairspring intersects the central axis of the balance spring at least one of the outer end portion of the hairspring, the hairspring and the hair support. Since the outer end portion inclined arrangement structure for arranging the outer end portions is provided, at least a part of the hairspring can be reliably inclined with respect to the central axis of the balance. Thereby, the fall of the rate by the influence of an escapement error can be suppressed. In addition, since the outer end inclined arrangement structure is provided on at least one of the outer end portion of the hairspring, the beard and the beard holder, the shape of the member provided with the outer end inclined arrangement structure is changed. By doing so, the inclination angle of the hairspring can be easily set to be an arbitrary inclination angle.

  The outer end inclined arrangement structure is formed by the whiskers, and the whiskers are provided so as to be rotatable about a radial axis of the hairspring relative to the whiskers. The outer end of the hairspring is provided so as to be rotatable about a tangent to the Archimedes curve, and the outer end of the hairspring is arranged around the radial axis of the hairspring and the hairspring. The spring is supported by the whiskers in a state in which the mainspring is rotated around at least one of the tangents of the outer end portion of the mainspring.

According to the present invention, the outer end portion inclined arrangement structure is formed by a whisker and is provided so as to be rotatable about the radial axis of the balance spring, and also has a tangent to the Archimedes curve at the outer end portion of the balance spring (hereinafter referred to as the following). , Simply referred to as “tangent”) so that the whisker can be rotated about the radial axis of the hairspring and the tangent of the outer end of the hairspring in any direction. The outer end of the hairspring can be inclined. In particular, when the inner end portion of the hairspring is inclined, the inclination angle and direction of the outer end portion of the hairspring can be arbitrarily adjusted in accordance with the inclination angle of the inner end portion. In addition, the outer end portion of the hairspring is supported by the whiskers in a state where the hairspring is rotated around at least one of the radial axis of the hairspring and the tangent line of the outer end portion of the hairspring. Of the inner peripheral surface of the hairspring, the inner peripheral surface of the outer end fixed to the whiskers can be inclined with respect to the central axis of the balance.
Here, it was confirmed that when the outer end portion of the hairspring is inclined with respect to the central axis of the balance spring, the rate can be increased in the range of the balance of the balance with which the rate is significantly reduced due to the effect of the escapement error. It was. In particular, it has been confirmed that when the inner end portion of the hairspring is inclined with respect to the central axis of the spring and the outer end portion of the hairspring is inclined with respect to the central axis of the spring, the rate can be further increased. It was. Therefore, by arranging the inner end of the hairspring to be inclined with respect to the central axis of the spring and by arranging the outer end of the hairspring to be inclined with respect to the central axis of the spring, A decrease in yield can be effectively suppressed.

The timepiece movement of the present invention is characterized in that the balance with the balance is incorporated.
The timepiece of the present invention is characterized by including the above-described timepiece movement.
According to the present invention, it is possible to obtain a highly accurate timepiece movement and timepiece with little escapement error.

  According to the present invention, when the inner peripheral surface of the hairspring is extended in the true axial direction, at least a part of the inner peripheral surface intersects with the central axis of the spring. At least a portion of the mainspring can be disposed inclined with respect to the central axis of the spring. Here, it was confirmed that when at least a part of the hairspring is inclined with respect to the central axis of the balance, the rate can be increased within the range of the balance of the balance with which the rate significantly decreases due to the effect of the escapement error. . Accordingly, by disposing at least a part of the hairspring with respect to the true central axis, it is possible to suppress a decrease in the rate due to the influence of the escapement error. Further, since the center axis of the hairspring is a virtual axis, it has been difficult to measure the direction and amount of eccentricity of the hairspring in the prior art. In contrast, since the inclination angle of the hairspring can be easily measured, the inclination angle of the hairspring can be easily adjusted. Therefore, according to the balance with the present invention, the rate can be easily adjusted to reduce the escapement error, and a stable rate characteristic can be obtained.

1 is an external view of a timepiece according to an embodiment. It is the top view seen from the front side of the movement. It is a top view of the balance with a balance concerning a first embodiment. It is sectional drawing along the AA line of FIG. FIG. 5 is an enlarged view of a whiskerball in FIG. 4. It is explanatory drawing of a beard holding and a beard holding. It is a graph which shows the change of the rate with respect to the swing angle of a balance with hairspring. It is a graph which shows the change of the rate with respect to the swing angle of a balance with hairspring. It is explanatory drawing of the balance with a 1st modification of 1st embodiment. It is explanatory drawing of the balance with the 2nd modification of 1st embodiment. It is explanatory drawing of the balance with the 3rd modification of 1st embodiment. It is an enlarged view of the inner end part of a hairspring. It is explanatory drawing of the balance with the 4th modification of 1st embodiment. It is explanatory drawing of the balance with the 5th modification of 1st embodiment. It is explanatory drawing of the balance with the 6th modification of 1st embodiment. It is an enlarged view of the beard ball which concerns on the 6th modification of 1st embodiment. It is explanatory drawing of the balance with hair which concerns on 2nd embodiment. It is explanatory drawing of the balance with hair which concerns on 3rd embodiment. It is explanatory drawing of the balance with hair which concerns on 4th embodiment. It is explanatory drawing of the balance with hair which concerns on 5th embodiment. It is sectional drawing along the BB line of FIG. It is explanatory drawing of the balance with hair which concerns on 6th embodiment. It is a graph which shows the influence of the escapement error with respect to a rate. It is a graph which shows the rate characteristic by the eccentricity of a hairspring, and the sliding movement of an outer end part. It is a graph which shows adjustment of a rate.

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 the wristwatch according to the embodiment will be described. Details 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, a complete timepiece 1 according to the present embodiment includes a movement 100 and a dial 11 having a scale indicating time information in a timepiece case 3 made of a case back cover and glass 2 (not shown). And a pointer including an hour hand 12 indicating the hour, a minute hand 13 indicating the minute, and a second hand 14 indicating the second. The dial 11 has a date window 11a for clearly indicating a number representing a date. Thereby, the timepiece 1 can check the date in addition to the time.

FIG. 2 is a plan view of the movement 100 as viewed from the front side. In FIG. 2, in order to make the drawing easy to see, some of the timepiece components constituting the movement 100 are not shown, and each timepiece component is shown in a simplified manner.
As shown in FIG. 2, the movement 100 of the mechanical timepiece has a base plate 144 that constitutes a substrate. A winding stem 110 is rotatably incorporated in the winding stem guide hole 102 of the main plate 144. The position of the winding stem 110 in the axial direction of the winding stem 110 is determined by a switching device including a setting lever 103, a yoke 105, a yoke spring 107, and a back presser 109.
Then, when the winding stem 110 is rotated, the hour wheel 112 is rotated through the rotation of the clutch wheel (not shown). The round hole wheel 114 and the square hole wheel 116 are sequentially rotated by the rotation of the hour wheel 112, and the mainspring (not shown) accommodated in the barrel complete 120 is wound up.

In the barrel 120, tenons (not shown) projecting from both ends of the barrel barrel, which is a shaft, are pivotally supported by the ground plate 144 and the barrel holder 134, respectively. It is supported in a rotatable manner. In the second wheel 124, the third wheel 126, the fourth wheel 128, and the escape wheel 130, tenons (not shown) protruding from both ends of the respective shaft portions are respectively connected to the base plate 144 and the train wheel bridge 136. By being pivotally supported, the base plate 144 and the train wheel bridge 136 are rotatably supported.
When the barrel wheel 120 is rotated by the restoring force of the mainspring, the second wheel 124, the third wheel 126, the fourth wheel 128, and the escape wheel 130 are sequentially rotated by the rotation of the barrel wheel 120. The barrel wheel 120, the second wheel 124, the third wheel 126, and the fourth wheel 128 constitute a front wheel train.

  When the center wheel & pinion 124 is rotated, a cylindrical pinion (not shown) is simultaneously rotated based on the rotation, and a minute hand 13 (see FIG. 1) attached to the cylindrical pinion indicates “minute”. . Further, the hour wheel (not shown) is rotated through the rotation of the minute wheel (not shown) based on the rotation of the hour pinion, and the hour hand 12 (see FIG. 1) attached to the hour wheel is “hour”. Is displayed.

The escapement and speed control device 140 for controlling the rotation of the front train wheel is constituted by an escape wheel 130, ankle 142, and balance with hairspring 10.
Teeth 132 are formed on the outer periphery of the escape wheel & pinion 130. The ankle 142 is rotatably supported between the main plate 144 and the ankle receiver 138, and includes a pair of stones 142a and 142b. The escape wheel 130 is temporarily stopped with one pallet 142a of the ankle 142 engaged with the teeth 132 of the escape wheel 130.
The balance with hairspring 10 is rotatably supported between the balance with hairspring 104 (corresponding to the “supporting member” in the claims) and the main plate 144, and reciprocally rotates at a constant period, whereby the tooth of the escape wheel & pinion 130. 132, one pallet 142a and the other pallet 142b of the ankle 142 are alternately engaged and released. Thereby, the escape wheel & pinion 130 is escaped at a constant speed. The details of the balance 10 will be described later.

  Under such a configuration, after winding the mainspring (not shown) accommodated in the barrel complete 120 using the winding stem 110, the barrel complete 120 is rotated by the rotational force when the mainspring is rewound. As the barrel wheel 120 rotates, the second wheel 124 engaged therewith rotates. When the center wheel & pinion 124 rotates, the center wheel & pinion 126 that meshes with the center wheel rotates. When the third wheel & pinion 126 rotates, the fourth wheel & pinion 128 meshing therewith rotates. When the fourth wheel & pinion 128 rotates, the escapement / regulator 140 is driven. When the escapement and speed control device 140 is driven, the fourth wheel & pinion 128 is controlled to rotate once per minute and the second wheel & pinion 124 is controlled to rotate once per hour.

(First embodiment)
Next, details of the balance with hairspring 10 according to the first embodiment will be described.
FIG. 3 is a plan view of the balance with hairspring 10 according to the first embodiment, and shows a state viewed from the front side of the movement 100 (see FIG. 2). In FIG. 3, a beard 60 and a beard holder 70 which will be described later are illustrated by two-dot chain lines.
4 is a cross-sectional view taken along line AA in FIG. In FIG. 4, the upper side of the paper surface across the base plate 144 is the front side of the movement 100 (see FIG. 2), and the lower side of the paper surface across the base plate 144 is the back side of the movement 100. Further, the balance holder 104, the main plate 144, and the beard holder 70 are illustrated by two-dot chain lines.
As shown in FIG. 3, the balance with hairspring 10 includes a main balance wheel 20, a balance stem 30, a hairspring 40, a beard ball 50, a beard 60, and a beard retainer 70. Each component constituting the balance 10 will be described below. In the following, the center of rotation when the balance 10 is reciprocally rotated is referred to as the central axis O, the direction along the central axis O is referred to as the axial direction, and the direction orthogonal to the central axis O is referred to as the radial direction. The direction of turning around is called the circumferential direction. 4 and subsequent figures, the center of the hairspring 40 (the center of the Archimedes curve) is shown as the central axis C.

The balance wheel 20 includes, for example, an annular portion 21 formed in a substantially annular shape with a metal material such as brass, and four extending from the inner peripheral surface of the annular portion 21 toward the central axis O along the radial direction. And the arm portion 23.
The annular portion 21 of the balance wheel 20 is arranged coaxially with the central axis O.
The four arm portions 23 are formed at substantially equal intervals so as to have a 90 ° pitch in the circumferential direction. As shown in FIG. 4, a coupling hole 25 a coaxial with the central axis O is formed in the connecting portion 25 of the four arm portions 23. The fitting hole 25 a of the connecting portion 25 is, for example, press fitted into the balance wheel fixing portion 31 of the balance stem 30. As a result, the balance wheel 20 is fitted and fixed to the balance stem 30 so as to be rotatable together with the balance stem 30.

The balance stem 30 is a rod-shaped shaft member made of a metal material such as brass, for example, and the central axis of the balance stem 30 coincides with the central axis O that is the rotation center of the balance 10.
The balance stem 30 includes a balance wheel fixing portion 31 and a hair ball fixing portion 32 formed on the balance holder 104 side (the upper side in FIG. 4) with respect to the balance wheel fixing portion 31. The balance wheel fixing part 31 and the whisker ball fixing part 32 are each formed in a cylindrical shape coaxial with the central axis O.
Further, the balance stem 30 includes tenons 33 which are formed to be tapered at both ends in the axial direction. As for the balance stem 30, one tenon 33a is pivotally supported on the balance 104 via a bearing (not shown), and the other tenon 33b is pivotally supported on the main plate 144 via a bearing (not shown). It can be rotated around.

  The balance stem 30 includes a cylindrical swing seat 35 on the base plate 144 side (lower side in FIG. 4) with respect to the balance wheel 20 in the axial direction. The swing seat 35 is formed with a flange portion 36 projecting in the radial direction. On the outer side of the flange portion 36 in the radial direction, a rock stone (not shown) is provided at a predetermined position. The pallet stone reciprocates the ankle 142 by colliding with the inner peripheral surface of the ankle 142 at a constant period in synchronism with the period of the reciprocating rotation of the balance 10, so that one pallet 142 a and the other claw of the ankle 142 are reciprocated. Stones 142b (both see FIG. 2) are flipped up alternately. As a result, as shown in FIG. 2, one pallet 142 a and the other pallet 142 b of the ankle 142 are engaged with and released from the teeth 132 of the escape wheel 130.

As shown in FIG. 4, the balance with hairspring 10 is provided with a hairspring 40 on the balance receiver 104 side (upper side in FIG. 4) with respect to the balance wheel 20. As shown in FIG. 3, the hairspring 40 is a thin plate spring made of a metal material such as iron or nickel, for example, and has a spiral hairspring main body 41 having a plurality of turns and a hairspring main body 41. And an arcuate portion 42 on the outer peripheral side. The hairspring 40 is formed such that the spiral shape of the hairspring main body 41 is along a so-called Archimedes curve. Thereby, when the hairspring 40 is viewed from the axial direction, the hairspring main body portions 41 adjacent to each other in the radial direction are arranged at substantially equal intervals. A part of the inner peripheral surface of the inner end 43 (that is, the inner end 43 of the hairspring 40) of the hairspring main body 41 is an inner end fixing surface 43a that is fixed to the hairball 50 by welding, for example. Yes. By welding the inner end fixing surface 43 a of the hairspring 40 to the hairball 50, the inner end 43 of the hairspring 40 is connected to the balance 30 via the hairball 50.
The arc portion 42 is formed on the outer peripheral side of the hairspring main body 41 so as to have a larger radius of curvature than the hairspring main body 41. An outer end portion 45 of the arc portion 42 (that is, an outer end portion 45 of the hairspring 40) is fixed to a beard 60 described later.

FIG. 5 is an enlarged view of the ball 50 in FIG.
As shown in FIG. 5, the whisker ball 50 is an annular member formed of a metal material such as nickel or a nickel alloy, for example, and a support part to which the cylindrical part 51 and the inner end part 43 of the hairspring 40 are fixed. 53.
The inner diameter of the through hole 51 a of the cylindrical portion 51 is smaller than the outer diameter of the whistle ball fixing portion 32 of the balance stem 30 so that the outer fit press-fitting into the balance stem 30 is possible.
The support portion 53 is formed so as to protrude outward in the radial direction at the end portion of the tubular portion 51 on the balance holder 104 side (see FIG. 4, the upper side in FIG. 5). The outer surface of the support portion 53 is a fixed surface 55 to which the inner end fixing surface 43a of the hairspring 40 is fixed by welding or the like.

  The central axis of the through hole 51a of the whisker ball 50 includes the central axis and intersects the fixed surface 55 (that is, the cross section along the line AA in FIG. 3) with respect to the fixed surface 55 of the support portion 53. It is inclined by an angle θ1. Therefore, when the central axis O is aligned with the central axis of the through hole 51a of the whisker ball 50, the through hole 51a of the whistle ball 50 is inserted into the balance 30 and the whistle ball 50 is externally fixed to the balance 30. In the state where the central axis C of the Archimedes curve of the hairspring 40 is inclined with respect to the central axis O by the angle θ1, and the inner end fixing surface 43a of the hairspring 40 is inclined with respect to the central axis O by the angle θ1. The mainspring 40 is fixed to the balance 30.

  Thereby, when the hair ball 50 extends the inner peripheral surface 40a of the hairspring 40 in the axial direction (in FIG. 5, the inner end fixing surface 43a of the inner peripheral surface 40a of the hairspring 40 is extended in the axial direction. The inner end 43 of the hairspring 40 can be inclined so as to intersect the central axis O at an angle θ1. In this way, by forming the through hole 51a that is inclined by the angle θ1 with respect to the fixed surface 55 of the support portion 53, the inner end portion inclined arrangement structure 80 that can arrange the inner end portion 43 of the hairspring 40 in an inclined manner is used as a whisker. 50. In addition, an effect | action and effect when the inner end part 43 of the hairspring 40 is inclined are mentioned later.

FIG. 6 is an explanatory diagram of the beard 60 and the beard holder 70. In FIG. 6, only the hairspring 40, the hairspring 60, and the hairbearing receiver 70 among the components of the balance 10 are illustrated for easy understanding. A tangent to the Archimedes curve at the outer end 45 of the hairspring 40 is shown as T (hereinafter referred to as “tangent T”), and a radial axis perpendicular to the tangent T is shown as R.
As shown in FIG. 6, the outer end portion 45 of the hairspring 40 is connected to the balance with hairspring 104 (see FIG. 4) via a hairbrush 60 and a hairbrush holder 70 that supports the hairbrush 60.

The whisker 60 includes a holding part 61, a beard main body 63, and a fixing bolt 65.
The holding portion 61 is formed in a cylindrical shape, and the outer end portion 45 of the hairspring 40 is fixed to the inside by, for example, an adhesive.
The whisker main body 63 is formed in a rectangular parallelepiped shape. The beard main body 63 is formed with a through-hole 63a into which the holding portion 61 can be inserted. The central axis of the through-hole 63 a is provided along the tangent line T of the outer end 45 of the hairspring 40. The outer end 45 of the hairspring 40 together with the holding portion 61 is disposed in the through-hole 63 a of the beard main body 63. At this time, the holding portion 61 is attached to the whistling main body portion 63 so as to be rotatable around the tangent line T in the through hole 63a.
In addition, a fixing bolt 65 is screwed onto the whisker main body 63 from the outside in the radial direction. The front end of the fixing bolt 65 is disposed so as to contact the outer peripheral surface of the holding portion 61 by tightening the fixing bolt 65. Thereby, since the holding | maintenance part 61 can be fixed in the state rotated only the predetermined angle around the tangent line T, the outer end part 45 of the hairspring 40 can be inclined around the tangent line T.

The whisker holder 70 includes a mounting part 71, a whisker support part 73, a connection part 75, and a fixing bolt 77.
The attachment portion 71 is formed in a C shape and is arranged coaxially with the central axis O. The attachment portion 71 is fixed to the balance holder 104 (see FIG. 4) by, for example, an adhesive or the like, an external fitting press fit, or the like.
The hair support part 73 is formed to project toward the hairspring 40 side along the axial direction at a position corresponding to the outer end 45 of the hairspring 40. The whisker support portion 73 is connected to the attachment portion 71 via the connection portion 75.

An outer surface in the radial direction of the whisker support portion 73 is an attachment surface 73a to which the whisker 60 is attached. The beard main body 63 of the beard 60 is attached to the attachment surface 73a of the beard support 73 via a shaft member (not shown). Thereby, the whisker 60 can be rotated around the radial axis R with respect to the whisker receiver 70.
A fixing bolt 77 is screwed on a side surface of the whisker support portion 73 facing the circumferential direction. The front end of the fixing bolt 77 is disposed so as to abut on the outer peripheral surface of a shaft member (not shown) that pivotally supports the whisker 60 by tightening the fixing bolt 77. Accordingly, the whisker 60 can be fixed in a state of being rotated by a predetermined angle around the radial axis R, so that the outer end 45 of the hairspring 40 is inclined around the radial axis R. Can do.

  As described above, the whiskers 60 are provided so as to be rotatable about the radial axis R of the hairspring 40 with respect to the hairbearing receiver 70 and are centered on the tangent T of the outer end 45 of the hairspring 40. It is provided rotatably. As a result, the hairspring 60 can tilt the outer end 45 of the hairspring 40 so as to intersect the central axis O when the inner peripheral surface 40a of the hairspring 40 is extended in the axial direction. As described above, in the present embodiment, the bevel 60 and the beard holder 70 are provided with the outer end portion inclined arrangement structure 90 in which the outer end portion 45 of the hairspring 40 can be inclined. In addition, an effect | action and effect when the outer end part 45 of the hairspring 40 is inclined are mentioned later.

(Function)
Next, the operation of the balance with hairspring 10 described above when the inner end 43 and the outer end 45 of the hairspring 40 are inclined will be described. In addition, refer to FIGS. 1 to 6 for the reference numerals of the components in the following description.
First, the inner end portion 43 of the hairspring 40 is disposed so as to be inclined by the angle θ1 (see FIG. 5), and the rate (sec / second) with respect to the swing angle (°) of the balance 10 when the value of the angle θ1 is variously changed. The change in Japan was examined by simulation. At this time, as shown in FIG. 4, the central axis C of the Archimedes curve of the hairspring 40 is arranged so as to be inclined with respect to the central axis O by an angle θ1. As a result, in the cross section including the central axis O and the central axis C of the Archimedes curve, the plurality of inner peripheral surfaces 40a of the balance spring 40 are all parallel to the central axis C of the Archimedes curve and to the central axis O. Are arranged so as to be inclined by an angle θ1.

In FIG. 7, the vertical axis represents the rate (seconds / day), the horizontal axis represents the swing angle (°) of the balance 10, and the angle θ1 with respect to the central axis O of the inner end portion 43 of the hairspring 40 is represented by x1, x2, x3. It is a graph which shows the change of the rate with respect to the swing angle of the balance with hairspring 10 when it changes to each value of x4 and the inner end part 43 of hairspring 40 is inclined and arranged. Here, each value of x1, x2, x3, x4, which is the angle θ1 of the inner end portion 43 of the hairspring 40, is set so as to increase in this order.
As shown in FIG. 7, it was confirmed that the rate increased as the angle θ <b> 1 of the inner end 43 of the hairspring 40 increased in the range where the swing angle of the balance 10 was about 250 ° or less. It was also confirmed that the rate of increase in the rate with the decrease in the swing angle of the balance with hairspring 10 increases as the angle θ1 of the inner end 43 of the hairspring 40 increases.

  Subsequently, the inner end portion 43 of the hairspring 40 is disposed so as to be inclined by the angle θ1, and the outer end portion 45 of the hairspring 40 is set to the angle θ1 in the same direction as the inclination direction of the inner end portion 43 of the hairspring 40. In addition, the change of the rate (second / day) with respect to the swing angle (°) of the balance 10 when the angle θ2 was further tilted and the value of the angle θ2 was variously changed was examined by simulation. At this time, the central axis C of the Archimedes curve of the hairspring 40 is arranged so as to be inclined with respect to the central axis O by an angle θ1. Further, in the cross section including the central axis O and the central axis C of the Archimedes curve, the inclination angle of the plurality of inner peripheral surfaces 40a of the balance spring 40 with respect to the central axis O is asymptotic to the angle θ2 from the inner side to the outer side in the radial direction. It is arranged so as to be inclined. That is, the inner end portion 43 and the outer end portion 45 of the hairspring 40 are both inclined with respect to the central axis O.

In FIG. 8, the vertical axis is the rate (seconds / day), the horizontal axis is the swing angle (°) of the balance 10, and the angle θ1 with respect to the central axis O of the inner end portion 43 of the hairspring 40 is fixed as, for example, x3. 6 is a graph showing changes in the rate with respect to the swing angle of the balance with hairspring 10 when the angle θ2 with respect to the central axis O of the outer end 45 of the hairspring 40 is changed to each value of y1, y2, y3, and y4. Here, each value of y1, y2, y3, y4 which is the angle θ2 of the outer end 45 of the hairspring 40 is set to increase in this order.
As shown in FIG. 8, it was confirmed that the rate increased as the angle θ2 of the outer end 45 of the balance spring 40 increased in the range where the swing angle of the balance 10 was about 220 ° or less. It was also confirmed that the rate of increase in the rate with the decrease in the swing angle of the balance with hairspring 10 increased as the angle θ2 of the outer end 45 of the hairspring 40 increased.

Here, as shown in FIG. 23, the escapement error is caused by a decrease in the torque of the mainspring which is the power source of the front train wheel, and the rate decreases as the swing angle of the balance with hairspring 10 decreases. In particular, it is known that when the swing angle of the balance with hairspring 10 is 200 ° or less, the rate is significantly reduced.
On the other hand, as shown in FIG. 7, the swing angle is set by inclining the angle θ1 of the inner end 43 of the hairspring 40 and increasing the angle θ1 of the inner end 43 of the hairspring 40. Within a range of about 250 ° or less, the rate can be increased, and the rate of increase in the rate due to the decrease in the swing angle of the balance with hairspring 10 can be increased. Further, as shown in FIG. 8, the inner end 43 of the hairspring 40 is inclined and the outer end 45 of the hairspring 40 is further inclined by the angle θ2 in addition to the angle θ1. By increasing the angle θ2 of the outer end 45 of the mainspring 40, the rate can be increased in the range where the swing angle is about 220 ° or less, and the rate of increase in the rate associated with the decrease in the swing angle of the balance 10 is increased. Can be increased. Therefore, the rate is significantly reduced due to the effect of the escapement error. In the range where the swing angle of the balance is 200 ° or less (see FIG. 23), the rate reduction due to the effect of the escapement error is effectively suppressed. it can.

  According to the present embodiment, when the inner peripheral surface 40a of the hairspring 40 is extended in the axial direction of the spring 30, the hairspring 40 is formed so as to intersect the central axis O of the spring 30. It can be inclined with respect to the central axis O of the balance 30. Here, when the balance spring 30 is inclined with respect to the central axis O of the balance 30, the range of the swing angle of the balance 10 in which the rate is significantly reduced due to the effect of the escapement error (the balance angle of the balance in FIG. 23 is It was confirmed that the rate could be increased in a range of 200 ° or less (see the graph of FIG. 7 and the graph of FIG. 8). Therefore, by disposing the hairspring 40 with an inclination with respect to the central axis O of the balance 30, it is possible to suppress a decrease in the rate due to the influence of the escapement error. Further, since the center axis C of the hairspring 40 is a virtual axis, it has been difficult to measure the direction and amount of eccentricity of the hairspring 40 in the prior art. On the other hand, since the inclination angle of the hairspring 40 can be easily measured, the inclination angle of the hairspring 40 can be easily adjusted. Therefore, according to the balance with hairspring 10 of this embodiment, the rate can be easily adjusted to reduce the escapement error, and a stable rate characteristic can be obtained.

  Further, since the hair ball 50 is provided with the inner end inclined arrangement structure 80 in which the inner end portion 43 of the hairspring 40 is arranged so that the inner peripheral surface 40a of the hairspring 40 intersects the central axis O of the balance spring 30. The hairspring 40 can be surely inclined with respect to the central axis O of the balance stem 30. Thereby, the fall of the rate by the influence of an escapement error can be suppressed. In addition, since the inner end portion inclined arrangement structure 80 is provided on the whisker ball 50, it is easy to set the tilt angle of the hairspring 40 to an arbitrary tilt angle by changing the shape of the whistle ball 50 or the like. it can.

  Further, among the inner peripheral surface 40 a of the hairspring 40, the inner end fixing surface 43 a fixed to the hair ball 50 can be inclined with respect to the central axis O of the balance stem 30. Therefore, it is possible to suppress a decrease in the rate due to the influence of the escapement error.

  Further, the outer end portion inclined arrangement structure in which the outer end portion 45 of the hairspring 40 is disposed on the hairspring 60 and the hairbearing receiver 70 so that the inner peripheral surface 40a of the hairspring 40 intersects the central axis O of the balance spring 30. Since 90 is provided, the balance spring 40 can be reliably inclined with respect to the central axis O of the balance 30. Thereby, the fall of the rate by the influence of an escapement error can be suppressed. Further, since the bevel 60 and the beard holder 70 are provided with the outer end portion inclined arrangement structure 90, the inclination angle of the hairspring 40 can be arbitrarily set by changing the shape of the beard 60 and the beard holder 70, etc. It can be easily set to be an inclination angle of.

Further, the outer end inclined arrangement structure 90 is formed by the beard 60 and the beard retainer 70 and is provided so as to be rotatable about the radial axis R of the hairspring 40, and the outer end portion of the hairspring 40. 45 is provided so as to be rotatable around the tangent line T of the shaft 45. Therefore, by rotating the shaft 60 around the radial axis R of the hairspring 40 and around the tangent line T of the outer end 45 of the hairspring 40, an arbitrary The outer end 45 of the hairspring 40 can be inclined in the direction of. In particular, when the inner end portion 43 of the hairspring 40 is inclined, the inclination angle and the inclination direction of the outer end portion 45 of the hairspring 40 can be arbitrarily adjusted in accordance with the inclination angle of the inner end portion 43. Further, the outer end 45 of the hairspring 40 is rotated in a state where the hairspring 60 is rotated around at least one of the radial axis R of the hairspring 40 and the tangent T of the outer end 45 of the hairspring 40. Since it is supported by the whiskers 60, the inner peripheral surface of the outer end 45 fixed to the whiskers 60 can be inclined with respect to the central axis of the balance 30 among the inner peripheral surfaces 40 a of the hairspring 40.
Therefore, by arranging the inner end portion 43 of the hairspring 40 to be inclined with respect to the central axis O of the spring 30 and arranging the outer end portion 45 of the hairspring 40 to be inclined with respect to the central axis O of the spring 30. Thus, it is possible to effectively suppress the decrease in the rate due to the influence of the escapement error.

  In addition, according to the present invention, by incorporating the balance 10 described above, it is possible to obtain a highly accurate movement 100 with little escapement error and a timepiece 1 including the movement 100.

(Each variation of the first embodiment)
Then, the balance 10 which concerns on each modification of 1st embodiment is demonstrated. In the following modifications of the first embodiment, each form of the inner end inclined structure 80 will be described.
The balance with hairspring 10 of the first embodiment is provided with the inner end portion inclined arrangement structure 80 on the whistle ball 50 and by forming a through hole 51a inclined by an angle θ1 with respect to the fixed surface 55 of the support part 53 of the whistle ball 50. The inner end portion 43 of the hairspring 40 is inclined with respect to the central axis O (see FIG. 5).
On the other hand, the inner end inclined arrangement structure 80 is not limited to the first embodiment. That is, the inner end portion inclined arrangement structure 80 may be provided on at least one of the inner end portion 43, the balance stem 30 and the hair ball 50 of the hairspring 40, and the balance 10 according to each modification described below. The inner end portion 43 of the hairspring 40 may be inclined with respect to the central axis O by the inner end portion inclined arrangement structure 80. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.

(First modification of the first embodiment)
FIG. 9 is an explanatory view of the balance 10 according to the first modification of the first embodiment, and is an enlarged view of the inner end inclined arrangement structure 80.
As shown in FIG. 9, the whisker ball 50 is formed with a through hole 51 a that can be externally fitted to the whistle ball fixing part 32 of the balance stem 30. Further, the outer surface of the support portion 53 of the hair ball 50 is a fixed surface 55 to which the inner end fixing surface 43a of the hairspring 40 is fixed by welding or the like. The fixed surface 55 of the whistle ball 50 includes a central axis of the through hole 51a of the whistle ball 50 and crosses the fixed surface 55 (that is, a cross section corresponding to a cross section along line AA in FIG. 3). It is inclined by an angle θ1 with respect to the central axis of the 50 through holes 51a. For this reason, with the central axis O aligned with the central axis of the through-hole 51a of the beard ball 50, the through-hole 51a of the beard ball 50 is inserted into the balance 30 and the beard ball 50 is externally fixed to the balance 30. When the central axis C of the Archimedes curve of the hairspring 40 is inclined by the angle θ1 with respect to the central axis O, and the inner end fixing surface 43a of the hairspring 40 is inclined by the angle θ1 with respect to the central axis O, The hairspring 40 is fixed to the balance 30. Thus, the inner end portion inclined arrangement structure 80 is provided on the balance stem 30 by forming the fixed surface 55 that is inclined by the angle θ1 with respect to the central axis O.

(Second modification of the first embodiment)
FIG. 10 is an explanatory view of the balance 10 according to the second modification of the first embodiment, and is an enlarged view of the inner end inclined arrangement structure 80.
As shown in FIG. 10, the balance stem 30 includes a balance wheel fixing portion 31, and a hair ball fixing portion 32 formed on the balance receiver 104 side (see FIG. 4, the upper side in FIG. 10) with respect to the balance wheel fixing portion 31. It is equipped with. The balance wheel fixing portion 31 is formed coaxially with the central axis O.
The whistle ball fixing portion 32 is formed such that its central axis is inclined with respect to the central axis O by an angle θ1. For this reason, when the whisker ball 50 is externally fixed to the balance 30 in a state where the central axis of the through hole 51a of the whistle ball 50 is aligned with the central axis of the whistle ball fixing part 32 in the balance 30, the whisker ball 50 is fixed. Is fixed to the central axis O in an inclined state by an angle θ1. Accordingly, in the state where the central axis C of the Archimedes curve of the hairspring 40 is inclined by the angle θ1 with respect to the central axis O, and the inner end fixing surface 43a of the hairspring 40 is inclined by the angle θ1 with respect to the central axis O, The hairspring 40 is fixed to the balance 30. In this way, the inner end portion inclined arrangement structure 80 is provided on the balance stem 30 by forming the whisker ball fixing portion 32 that is inclined with respect to the central axis O by the angle θ1.

(Third modification of the first embodiment)
FIG. 11 is an explanatory view of the balance 10 according to the third modification of the first embodiment, and is an enlarged view of the inner end inclined arrangement structure 80. FIG. 12 is an enlarged view of the inner end portion 43 of the hairspring 40.
As shown in FIGS. 11 and 12, the inner end fixing surface 43 a of the hairspring 40 is provided at the inner end 43 of the hairspring 40 so as to be inclined with respect to the inner peripheral surface 40 a of the hairspring 40. . Specifically, the inner end fixing surface 43a gradually moves from the balance 104 side (see FIG. 4, upper side in FIGS. 11 and 12) toward the main plate 144 side (see FIG. 4, lower side in FIGS. 11 and 12). The inclined surface is inclined inward in the radial direction. The inclination angle of the inner end fixing surface 43a with respect to the inner peripheral surface 40a is set to θ1. As a result, the inner end 43 of the hairspring 40 is fixed in an inclined state by an angle θ1 with respect to the central axis of the whistle ball 50 when the inner end fixing surface 43a is welded to the fixing surface 55 of the whistle ball 50. . Therefore, when the hair ball 50 is fitted and fixed to the balance 30, the central axis C of the Archimedes curve of the hairspring 40 is inclined by the angle θ1 with respect to the center axis O, and the inner peripheral surface 40 a of the hairspring 40 is centered. The hairspring 40 is fixed to the balance 30 in a state where it is inclined with respect to the axis O by an angle θ1. In this manner, the inner end portion inclined arrangement structure 80 is provided at the inner end portion 43 of the balance spring 40 by forming the inclined inner end fixing surface 43a.

(Fourth modification of the first embodiment)
FIG. 13 is an explanatory diagram of the balance with hairspring 10 according to the fourth modification of the first embodiment, and is an enlarged view of the inner end inclined structure 80. In FIG. 13, only the hair ball 50 and the hairspring 40 are shown.
As shown in FIG. 13, the inner end portion 43 of the hairspring 40 is twisted around the Archimedes curve by an angle θ1 at a portion adjacent to the inner end fixing surface 43a. Thus, the hairspring 40 is arranged in a state where the central axis C of the Archimedes curve is inclined with respect to the central axis O by the angle θ1. Further, in the cross section including the central axis O and the central axis C of the Archimedes curve, the inner peripheral surface 40a other than the inner end fixing surface 43a of the balance spring 40 is all parallel to the central axis C of the Archimedes curve. It is arranged to be inclined with respect to the central axis O by an angle θ1. Thus, the inner end portion inclined arrangement structure 80 is provided on the inner end portion 43 of the hairspring 40 by twisting the inner end portion 43 of the hairspring 40.

(Fifth modification of the first embodiment)
FIG. 14 is an explanatory view of the balance 10 according to the fifth modification of the first embodiment, and is an enlarged view of the inner end inclined arrangement structure 80. In FIG. 14, only the whistle ball 50 and the hairspring 40 are illustrated.
As shown in FIG. 14, a thin portion 54 is formed in the support portion 53 of the whistle ball 50 in the intermediate portion in the radial direction. The fixed surface 55 of the whisker ball 50 can be inclined in an arbitrary direction by plastically deforming the thin portion 54. Thereby, the inner end fixing surface 43a of the hairspring 40 is fixed in a state where it is inclined in an arbitrary direction with respect to the central axis O. Thus, the inner end inclined arrangement structure 80 is provided on the support portion 53 of the beard ball 50 by forming the thin portion 54 on the support portion 53 of the beard ball 50.

(Sixth modification of the first embodiment)
FIG. 15 is an explanatory diagram of the balance with hairspring 10 according to the sixth modification of the first embodiment, and is a perspective sectional view of the inner end portion inclined arrangement structure 80. FIG. 16 is an enlarged view of a whisker ball 50 according to a sixth modification of the first embodiment.
As shown in FIG. 15, the outer peripheral surface of the hair ball fixing portion 32 of the balance stem 30 is formed in a convex spherical shape. Further, the inner peripheral surface of the through hole 51 a of the whistle ball 50 is formed in a concave spherical shape corresponding to the outer shape of the whistle ball fixing part 32.
As shown in FIG. 16, slits 56 are formed in the cylindrical portion 51 and the support portion 53 of the whistle ball 50 along the radial direction when viewed from the axial direction. By providing the slit 56, the whisker ball 50 is formed in a C shape, and the cylindrical part 51 is elastically deformed so that the diameter can be increased.
As shown in FIG. 15, when the beard ball 50 is inserted into the beard ball fixing portion 32, the beard ball 50 is held by the beard ball fixing portion 32 by tightening the beard ball fixing portion 32 by the elastic force of the tube portion 51. The At this time, since the inner peripheral surface of the through-hole 51a of the whistle ball 50 and the whisker ball fixing part 32 are each formed in a spherical shape and are in surface contact with each other, the whisker ball 50 has an arbitrary direction around the center of the spherical surface. Can be tilted. Thereby, the inner end fixing surface 43a of the hairspring 40 is fixed in a state where it is inclined in an arbitrary direction with respect to the central axis O. In this way, the outer peripheral surface of the beard ball fixing portion 32 of the balance stem 30 is formed in a convex spherical shape, and the inner peripheral surface of the through-hole 51a of the whistle ball 50 is formed in a concave spherical shape, so that An inner end inclined arrangement structure 80 is provided on the balance 30.

(Each embodiment)
Next, the balance with hairspring 10 according to each embodiment will be described. In the following embodiments, each form of the outer end inclined structure 90 will be described.
The balance with hairspring 10 according to the first embodiment is provided with an outer end inclined arrangement structure 90 on the beard 60 and the beard retainer 70, and the beard 60 makes the radial axis R of the hairspring 40 with respect to the beard retainer 70. It was provided so as to be rotatable at the center and to be rotatable around the tangent T of the outer end 45 of the hairspring 40.
On the other hand, the outer end portion inclined arrangement structure 90 is not limited to the first embodiment. That is, the outer end inclined arrangement structure 90 may be provided on at least one of the outer end 45 of the hairspring 40, the beard 60 and the beard holder 70, and the balance 10 according to each modification described below. The outer end portion 45 of the hairspring 40 may be inclined with respect to the central axis O by the outer end portion inclined arrangement structure 90. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.

(Second embodiment)
FIG. 17 is an explanatory diagram of the balance with hairspring 210 according to the second embodiment, and is an explanatory diagram of the outer end portion inclined arrangement structure 90. In FIG. 17, the beard main body 263 of the beard 260 is illustrated by a two-dot chain line for easy understanding.
As shown in FIG. 17, a fixing bolt 265 is screwed to the beard main body 263 from the outside in the radial direction. The screw portion of the fixing bolt 265 is a worm screw portion 265a screwed in a spiral shape.
A worm gear portion 261 a that can mesh with the worm screw portion 265 a is provided on the outer peripheral surface of the holding portion 261 of the whisker 260 at a position corresponding to the worm screw portion 265 a of the fixing bolt 265.

  By rotating the fixing bolt 265 in a state where the worm screw portion 265a of the fixing bolt 265 and the worm gear portion 261a of the holding portion 261 are engaged with each other, the holding portion 261 has a through-hole with respect to the whisker body 263. It rotates around the tangent line T in 263a. Thereby, since the holding | maintenance part 261 can be fixed in the state rotated only the predetermined angle around the tangent T, the outer end part 45 of the hairspring 40 can be inclined around the tangent T. As described above, the worm screw portion 265 a is formed on the fixing bolt 265, and the worm gear portion 261 a is formed on the outer peripheral surface of the holding portion 261, thereby providing the outer end portion inclined arrangement structure 90 on the whistle 260. In particular, the outer end portion inclined arrangement structure 90 of the present embodiment finely adjusts the rotation angle of the holding portion 261 (that is, the inclination angle of the outer end portion 45 of the hairspring 40) according to the rotation angle of the worm screw portion 265a. It is effective in that it can.

(Third embodiment)
FIG. 18 is an explanatory view of the balance with hairspring 310 according to the third embodiment, and is an explanatory view of the outer end portion inclined arrangement structure 90.
As shown in FIG. 18, the holding portion 361 of the whiskers 360 is formed in a spherical shape. An insertion hole 366 is formed in the holding portion 361 so that the outer end 45 of the hairspring 40 can be inserted and fixed. From the holding part 361, a rod-like operation part 367 is erected along the axial direction toward the balance with hairspring 104 (see FIG. 4, upper side in FIG. 18).
A concave spherical surface portion is formed on the attachment surface 373 a of the whisker support portion 373 corresponding to the spherical surface of the holding portion 361.
Further, a rectangular parallelepiped support piece 374 is provided on the outer side in the radial direction of the whisker support portion 373 so as to face the mounting surface 373a of the beard support portion 373. A surface of the support piece 374 that faces the mounting surface 373a of the whisker support portion 373 is a mounting surface 374a. A concave spherical surface portion is formed on the mounting surface 374 a of the support piece 374 corresponding to the spherical surface of the holding portion 361, similarly to the mounting surface 373 a of the whisker support portion 373. The support piece 374 can be attached to the whisker support portion 373 from the outside in the radial direction by a plurality of fixing bolts 365.

  The holding portion 361 of the whiskers 360 is rotatably held between the whiskers support portion 373 and the support pieces 374. At this time, since the holding part 361 is sandwiched between the concave spherical surface part of the whisker support part 373 and the concave spherical part of the support piece 374, the holding part 361 can be rotated around the center of the spherical surface in any direction. ing. Then, by moving the operation unit 367 and rotating the holding unit 361 of the hairspring 360 so that the outer end 45 of the hairspring 40 is inclined at an arbitrary angle, a plurality of fixing bolts 365 are fastened. As a result, the outer end 45 of the hairspring 40 is fixed in an inclined state with respect to the central axis O. In this way, the holding portion 361 of the whiskers 360 is formed in a spherical shape, and the concave spherical portions are formed on the mounting surface 373a of the whisker support portion 373 and the mounting surface 374a of the support piece 374, whereby the whiskers 360 and An outer end inclined arrangement structure 90 is provided on the whisker holder 70.

(Fourth embodiment)
FIG. 19 is an explanatory diagram of the balance with hairspring 410 according to the fourth embodiment, and is an explanatory diagram of the outer end portion inclined arrangement structure 90.
As shown in FIG. 19, the holding part 461 of the whiskers 460 is formed in a spherical shape. An insertion hole 466 is formed in the holding portion 461 so that the outer end 45 of the hairspring 40 can be inserted and fixed.
The mounting surface 473a of the whisker support portion 473 is disposed so as to face the base plate 144 side (see FIG. 4; the lower side in FIG. 19), and a concave spherical surface portion is formed corresponding to the spherical surface of the holding portion 461. ing.
Further, a rectangular parallelepiped support piece 474 is provided on the ground plate 144 side (see FIG. 4, lower side in FIG. 19) of the whisker support portion 473 so as to face the mounting surface 473 a of the beard support portion 473. Yes. A surface of the support piece 474 that faces the mounting surface 473a of the whisker support portion 473 is a mounting surface 474a. A concave spherical surface portion is formed on the mounting surface 474a of the support piece 474 corresponding to the spherical surface of the holding portion 461, similarly to the mounting surface 473a of the whisker support portion 473. The support piece 474 can be attached to the whisker support portion 473 from the base plate 144 side (see FIG. 4, the lower side in FIG. 19) by a plurality of fixing bolts 465.

  The holding portion 461 of the whiskers 460 is rotatably held between the whiskers support portion 473 and the support pieces 474. At this time, the holding portion 461 is sandwiched between the concave spherical surface portion of the whisker support portion 473 and the concave spherical surface portion of the support piece 474, so that the holding portion 461 can rotate in any direction around the center of the spherical surface. ing. Then, after rotating the holding portion 461 of the beard 460 so that the outer end 45 of the hairspring 40 is inclined at an arbitrary angle, a plurality of fixing bolts 465 are fastened, whereby the hairspring 40 is removed. The end 45 is fixed in an inclined state with respect to the central axis O in an arbitrary direction. In this way, the holding portion 461 of the whisker 460 is formed in a spherical shape, and the concave sphere portion is formed in the mounting surface 473a of the whisker support portion 473 and the mounting surface 474a of the support piece 474, whereby the whiskers 460 and An outer end inclined arrangement structure 90 is provided on the whisker holder 70.

(Fifth embodiment)
FIG. 20 is an explanatory diagram of the balance with hairspring 510 according to the fifth embodiment, and is an explanatory diagram of the outer end portion inclined arrangement structure 90. 21 is a cross-sectional view taken along line BB in FIG.
As shown in FIG. 20, the beard support portion 573 of the beard holder 70 is formed in a plate shape that projects outward in the radial direction. An adjustment bolt 68 is screwed to the whisker support portion 573 along the axial direction.
The whiskers 560 are formed in a columnar shape and are arranged along the axial direction with respect to the whiskers support portion 573. The whiskers 560 are held by the whiskers support portion 573 when the tips of the fixing bolts 565 fastened to the whiskers support portion 573 come into contact with each other from the outside in the radial direction. A groove-shaped holding portion 561 is recessed in the axial direction along the tangent line T of the outer end portion 45 of the hairspring 40 on the end surface of the base plate 144 side (see FIG. 4, lower side in FIG. 20) of the whiskers 560. Is formed. The outer end 45 of the hairspring 40 is fixed to the holding portion 561.

As shown in FIG. 21, the outer end portion 45 of the hairspring 40 is an adjustment portion 45a that is partially twisted and faces in the axial direction. The tip of the adjustment bolt 68 is in contact with the adjustment portion 45a. Further, in the outer end portion 45 of the hairspring 40, a region between the fixing portion 45b fixed to the holding portion 561 and the adjustment portion 45a is an elastic deformation portion 45c that can be elastically deformed in the axial direction.
By tightening the adjusting bolt 68, the elastic deforming portion 45c is elastically deformed, and the adjusting portion 45a moves to the main plate 144 side (see FIG. 4, lower side in FIG. 21). Further, by loosening the adjustment bolt 68, the adjustment portion 45a moves to the balance receiver 104 side (see FIG. 4, upper side in FIG. 21) by the elastic restoring force of the elastic deformation portion 45c. Thus, the outer end 45 of the hairspring 40 is fixed in an inclined state with respect to the central axis O by turning the adjusting bolt 68 to adjust the position of the adjusting portion 45a in the axial direction. The As described above, the adjustment bolt 68 is provided on the beard support portion 573 of the beard holder 70 and the adjustment portion 45 a and the elastic deformation portion 45 c are formed on the outer end portion 45 of the balance spring 40, thereby An outer end inclined arrangement structure 90 is provided on the hairspring 40.

(Sixth embodiment)
FIG. 22 is an explanatory diagram of the balance with hairspring 610 according to the sixth embodiment, and is an explanatory diagram of the outer end portion inclined arrangement structure 90.
As shown in FIG. 22, the beard support portion 673 of the beard holder 70 is formed in a plate shape that projects in the radial direction.
The whiskers 660 are formed in a columnar shape, and are arranged along the axial direction with respect to the whiskers support portion 673. The whiskers 660 are held by the whiskers support portion 673 by abutting the tips of the fixing bolts 665 fastened to the whiskers support portion 673 from the outside in the radial direction. A groove-shaped holding portion 661 is recessed in the axial direction along the tangent line T of the outer end portion 45 of the hairspring 40 on the end surface of the base plate 144 side (see FIG. 4, lower side in FIG. 22) of the whiskers 660. Is formed. The outer end 45 of the hairspring 40 is fixed to the holding portion 661.

  Here, a weakened portion 62 having a smaller diameter than the other portions is formed in an intermediate portion in the axial direction of the whiskers 660. A portion of the beard 660 closer to the base plate 144 than the weakened portion 62 (see FIG. 4, lower side in FIG. 22) can be inclined in an arbitrary direction by plastically deforming the weakened portion 62. As a result, the outer end 45 of the hairspring 40 is fixed in an inclined state with respect to the central axis O. In this way, by forming the fragile portion 62 in the beard 660, the outer end inclined arrangement structure 90 is provided in the beard 660.

  In any of the above-described embodiments, when the inner end portion 43 of the hairspring 40 is inclined, the inclination angle and the inclination of the outer end portion 45 of the hairspring 40 correspond to the inclination angle of the inner end portion 43. The direction can be adjusted arbitrarily. Therefore, the same effect as the first embodiment can be obtained. That is, it is possible to effectively suppress a decrease in the rate due to the influence of the escapement error.

  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.

  The inner end inclined arrangement structure 80 and the outer end inclined arrangement structure 90 are not limited to the above-described first embodiment, each modification of the first embodiment, and the aspect of each embodiment. Moreover, it is good also as a balance with the inner end part inclination arrangement structure 80 which concerns on each modification of 1st embodiment, and the outer end part inclination arrangement structure 90 which concerns on each embodiment arbitrarily combining.

  In the first embodiment, both the inner end portion 43 of the hairspring 40 and the outer end portion 45 of the hairspring 40 are arranged to be inclined with respect to the central axis O. However, the inner peripheral surface 40a of the hairspring 40 is not deformed. When extending in the axial direction of 30, at least the inner end portion 43 of the hairspring 40 is inclined so that at least a part of the inner circumferential surface 40 a of the hairspring 40 intersects the central axis O of the spring 30. Just do it.

  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 ... Clock 10,210,310,410,510,610 ... balance 20 ... balance wheel 30 ... balance 40 ... balance spring 40a ... inner peripheral surface 43 ... inside End 45 ... Outer end 50 ... Beard ball 60, 260, 360, 460, 560, 660 ... Beard 70 ... Beard holder 80 ... Inner edge inclined arrangement structure 90 ··· Outer end inclined arrangement structure 100 ··· Movement (watch movement) 104 ··· Balance (support member) O ··· Center axis R · · · Radial axis T · · · Outer end Tangent

Claims (7)

A balance stem that is rotatably arranged with respect to the support member, and the balance wheel is fitted and fixed;
A balance spring formed so as to follow the Archimedes curve, an inner end portion connected to the spring, and an outer end portion connected to the support member;
With
The balance with the balance spring formed so that at least a part of the inner peripheral surface intersects the central axis of the balance spring when the inner peripheral surface of the hairspring is extended in the axial direction of the balance spring. . The inner end portion of the hairspring is connected to the spring through a whisker ball that is externally fixed to the spring.
When at least one of the inner peripheral surface of the hairspring is extended in the axial direction on at least one of the inner end portion of the hairspring, the balance spring and the hairball, at least a part of the inner circumferential surface is The balance with hairspring according to claim 1, further comprising an inner end inclined arrangement structure that arranges the inner end of the balance spring so as to intersect the central axis of the balance.   The inner end portion inclined arrangement structure intersects the central axis of the balance spring when an inner end fixing surface fixed to the whisker ball is extended in the axial direction among the inner peripheral surface of the hairspring. The balance according to claim 2, wherein the inner end portion of the hairspring is arranged as described above. The outer end portion of the hairspring is connected to the support member via a whisker and a whisker support that supports the whisker,
When the inner peripheral surface of the hairspring is extended in the axial direction on at least one of the outer end portion of the hairspring, the beard, and the beard gripper, at least a part of the inner peripheral surface The outer end inclined arrangement structure for arranging the outer end portion of the balance spring so as to intersect the central axis of the balance spring is provided. No balance. The outer end inclined arrangement structure is formed by the beard,
The whiskers are provided so as to be rotatable about the radial axis of the hairspring relative to the whiskers, and are rotatable about a tangent to the Archimedes curve at the outer end portion of the hairspring. Provided in
The outer end portion of the hairspring is rotated in the state where the hairspring is rotated around at least one of the radial axis of the hairspring and the tangent line of the outer end portion of the hairspring. The balance with hairspring according to claim 4, wherein the balance is supported by a beard.   A timepiece movement in which the balance according to claim 1 is incorporated.   A timepiece comprising the timepiece movement according to claim 6.

Images