JP2013217900A - Weight for watch, movement for watch with weight for watch, and watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight for a watch in the simple balance ring shape to be provided to a balance wheel for watch speed control so that an inertia moment is set to desired adjustment width.SOLUTION: A weight 300 for a watch is provided to a balance wheel 200 for watch speed control, adjusts an inertia moment of the balance wheel, and has a trunk 301 which is rotatably provided centering on an axis to be provided to the balance wheel, in which the trunk has: a lower surface 307 which crosses the axis to be provided to the balance wheel; and an upper surface 306 which determines thickness in a direction of the axis to be provided to the balance wheel between it and the lower surface. A thickness on one side and a thickness on the other side in a radial direction of the axis 215 to be provided to the balance wheel are different from each other.

Description

  The present invention relates to a timepiece weight provided on a balance as a speed governor of a timepiece, a movement using the timepiece, and a timepiece.

  Generally, a balance for a watch movement capable of adjusting the moment of inertia has a wheel-shaped part including a rim (outer edge), an amida (arm), and an inertia block having an arbitrary arrangement. These inertia blocks are attached to the balance of the balance of the balance, and the balance of the balance and the moment of inertia can be corrected by adjusting the positions of the inertia blocks.

ここで、Ｉは、このてんぷの回転軸線の周りの慣性モーメントであり、また、Ｋは、このひげぜんまい付てんぷに於けるバネ定数である。時計の調速機の振動数は、通常、２．５Ｈｚから５Ｈｚ程度となる。したがって、時計に搭載されるムーブメントは、所与の振動数を基準として設計されており、ひげぜんまい付てんぷも、設計された振動数を実現しなければならない。 The balance with a spiral hairspring is attached to the balance. In consideration of the elastic coefficient of the hairspring, the vibration period of the balance with hairspring is given by the following equation (1).

Here, I is a moment of inertia around the rotation axis of the balance, and K is a spring constant in the balance spring. The frequency of the time governor of the timepiece is usually about 2.5 Hz to 5 Hz. Therefore, the movement mounted on the timepiece is designed based on a given frequency, and the balance spring-equipped balance must also realize the designed frequency.

  In the above formula 1, the parameter related to the balance is represented as I as the moment of inertia. In determining the moment of inertia of the balance with hairspring, the influence of amida on the moment of inertia is relatively small. On the other hand, as a factor that determines the moment of inertia of the balance with hairspring, the shape, size and density of the rim and the inertia block connected to the rim greatly influence. The inertia block is also used to adjust the balance of the balance of the balance of the balance wheel and to adjust the balance of the balance of the balance on the balance axis.

  Therefore, a balance with an adjusting screw that is screwed into the rim in the radial direction from the outside of the balance wheel is known (Patent Document 1). By changing the position of the balance wheel in the radial direction by turning the adjusting screw, the moment of inertia of the balance wheel can be changed, and the frequency of the balance spring with the balance spring as a time governor can be adjusted. Such a balance wheel is very difficult to process due to the fact that an adjustment screw is arranged on the side surface of the balance wheel and the shape of the balance wheel is complicated.

  There is also known a balance wheel having a configuration in which a recess opening on the upper surface of the rim is provided, and a pin sinks into the rim at the center of each recess (Patent Document 2). In these pins, a substantially C-shaped counterweight having a plurality of openings is press-fitted so as to be rotatable. By rotating these counterweights around the pin, the moment of inertia of the balance wheel can be changed, and the frequency of the balance spring with balance can be adjusted in the same manner. Since such a counterweight needs to be held with respect to the pin, the opening of the counterweight cannot be expanded beyond a predetermined range, and as a result, it is difficult to set a large adjustment range of the moment of inertia. is there.

Swiss Patent Publication CH196706 Swiss Patent Publication CH280067

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a timepiece weight capable of setting the moment of inertia of the balance with a desired adjustment width, a timepiece movement including a timepiece weight, and a timepiece. is there.

  In order to solve the above-mentioned problems, a timepiece weight according to the present invention is a timepiece weight provided on a balance for adjusting a timepiece and adjusting the moment of inertia of the balance, and centering on an axis provided on the balance. A body part rotatably provided; the body part having a lower surface intersecting the axis; and an upper surface defining an axial thickness of the body part between the lower surface and The thickness on one side is different from the thickness on the other side.

  With this configuration, the inertia moment adjustment range of the balance with hairspring can be adjusted to a desired value.

  In the timepiece weight according to the present invention, the upper surface has an inclined shape having a predetermined gradient angle with respect to the lower surface.

  With this configuration, in addition to the above-described effects, a desired moment of inertia adjustment range can be obtained by adjusting the gradient angle of the upper surface.

  In the timepiece weight according to the present invention, the upper surface has a shape in which the axial distance from the lower surface changes stepwise.

  With this configuration, in addition to the above-described effects, a desired inertia moment adjustment range can be obtained using the step of the body portion.

  In the timepiece weight according to the present invention, the upper surface includes a convex portion on one side of the shaft and a concave portion on the other side.

  With this configuration, in addition to the effects described above, a simple balance structure, a desired moment of inertia adjustment range, and a change in the shape of the convex and concave portions in the axial direction of the watch weight, the desired moment of inertia can be achieved. The adjustment range can be obtained.

In the timepiece weight according to the present invention, the upper surface has a first upper surface and a second upper surface that are different in distance from the lower surface, and the first upper surface and the second upper surface are made of different members.
By adopting such a configuration, in addition to the above-described effects, it is possible to obtain a desired moment of inertia adjustment range while facilitating the assembly of the watch weight, and further change the material of the constituent members constituting the watch weight. As a result, the adjustment range of the moment of inertia can be set larger.

  In the timepiece weight according to the present invention, the shaft has an attachment angle that forms a predetermined inclination with respect to the axial direction of the balance provided at the center of rotation of the balance with the balance.

  By setting it as this structure, in addition to the above-mentioned effect, the thickness of the balance wheel in the true direction can be reduced. Even if the timepiece weight is increased to increase the moment of inertia adjustment range, the balance of the balance wheel in the true direction can be suppressed. The adjustment range can be secured without causing interference between the components in the timepiece where the components are densely packed, that is, without impairing the function of adjusting the moment of inertia.

The timepiece movement according to the present invention adjusts the movement of the barrel wheel having a power source, the train wheel that transmits the rotational force of the barrel wheel, the escape mechanism that controls the rotation of the train wheel, and the escape mechanism. It has the above-mentioned balance with the above-mentioned balance and the above-mentioned timepiece weight is provided in the above-mentioned balance. By adopting such a configuration, it is possible to provide a timepiece movement having a balance with a balance with a desired moment of inertia.
Moreover, the timepiece according to the present invention has the above-described timepiece movement. With this configuration, it is possible to provide a timepiece having a balance with a desired adjustment range for the moment of inertia.

  The timepiece weight of the present invention makes it possible to adjust the adjustment range of the moment of inertia of the balance with a desired value.

It is the top view which looked at the movement of the mechanical timepiece in 1st Embodiment of this invention from the back cover side. It is a perspective view of the balance with the timepiece weight assembled in the first embodiment of the present invention. It is sectional drawing of the balance with which the weight for timepieces in 1st Embodiment of this invention was assembled | attached. It is a perspective view of the balance wheel before assembling the timepiece weight in the first embodiment of the present invention. It is a perspective view of the weight for timepieces in 1st Embodiment of this invention. (A) It is a top view of the weight for timepieces in 1st Embodiment of this invention. (B) It is a front view of the timepiece weight in 1st Embodiment of this invention. (C) It is a side view of the timepiece weight in 1st Embodiment of this invention. FIG. 3 is a cross-sectional view of a balance with a deformed manner of assembling the watch weight in the first embodiment of the present invention. It is a perspective view of the weight for timepieces in 2nd Embodiment of this invention. (A) It is a top view of the weight for timepieces in 2nd Embodiment of this invention. (B) It is a front view of the weight for timepieces in 2nd Embodiment of this invention. (C) It is a side view of the weight for timepieces in 2nd Embodiment of this invention. It is a perspective view of the weight for timepieces in 3rd Embodiment of this invention. (A) It is a top view of the weight for timepieces in 3rd Embodiment of this invention. (B) It is a front view of the weight for timepieces in 3rd Embodiment of this invention. (C) It is a side view of the timepiece weight in 3rd Embodiment of this invention. It is a disassembled perspective view of the weight for timepieces in 4th Embodiment of this invention. It is the perspective view which looked at the member B of the timepiece weight in 4th Embodiment of this invention from the lower surface side. (A) It is a top view of the weight for timepieces in 4th Embodiment of this invention. (B) It is a front view of the weight for timepieces in 4th Embodiment of this invention. (C) It is a side view of the weight for timepieces in 4th Embodiment of this invention. It is a perspective view of the weight for timepieces in 5th Embodiment of this invention.

(First embodiment)
(Mechanical watch)
First, a mechanical timepiece incorporating the timepiece weight of this embodiment will be described. FIG. 1 is a plan view of the movement of the mechanical timepiece according to the first embodiment as viewed from the back cover side. As shown in FIG. 1, the mechanical timepiece 100 includes a movement 101. The movement 101 has a base plate 102 that constitutes the substrate of the movement 101. A winding stem guide hole 103 is formed in the base plate 102, and a winding stem 104 is rotatably incorporated therein.

  On the back side of the movement 101 (the back side in the drawing in FIG. 1), a switching device (not shown) including a mandarin duck, a kanuki and a kanuki presser is arranged. The position of the winding stem 104 in the axial direction is determined by this switching device. On the other hand, on the front side of the movement 101 (the front side in FIG. 1), the fourth wheel 108, the third wheel 107, the second wheel 106, and the barrel complete 110 that constitute the front wheel train 105 are arranged. In addition, an ankle 3 for controlling the rotation of the front wheel train 105 is disposed.

  The barrel wheel 110 has a mainspring (not shown), and when the winding stem 104 is rotated, a not-illustrated wheel is rotated, and further, a kite wheel, a small iron wheel, a round hole wheel, and a square hole wheel (all are shown). The spring (not shown) is wound up via a not shown). The barrel wheel 110 is rotated by the rotational force when the spring (not shown) is rewound, and the second wheel & pinion 106 is further rotated. The second wheel & pinion 106 has a second pinion that meshes with a barrel wheel (not shown) of the barrel complete 110 and a second gear (both not shown). When the second wheel & pinion 106 rotates, the third wheel & pinion 107 is configured to rotate.

  The third wheel 107 has a third pinion (not shown) that meshes with the second gear of the second wheel 106 and a third gear (both not shown). When the third wheel & pinion 107 rotates, the fourth wheel & pinion 108 is configured to rotate. The fourth wheel 108 has a fourth pinion (not shown) that meshes with the third gear of the third wheel 107 and a fourth gear (both not shown). The escape wheel & pinion 2 is driven by the rotation of the fourth wheel & pinion 108. Then, by controlling the rotation driving and stopping of the escape wheel 2 by the ankle 3 and the balance with hairspring 200, the fourth wheel & pinion 108 is controlled to rotate once per minute, and the second wheel & pinion 106 rotates once per hour. To be controlled.

(Tempo)
Next, the balance with which the weight for timepieces of this embodiment is integrated is demonstrated. FIG. 2 is a perspective view of the balance with the watch weight according to this embodiment. FIG. 3 is a cross-sectional view of the balance with the watch weight according to this embodiment.

  The balance with hairspring 200 freely vibrates around the balance stem 204 which is a rotation shaft. In addition to the balance stem 204, the balance with a balance wheel 210 which is integrated with the balance stem 204 and freely vibrates. , A swing seat 206 holding a swing stone 207, a mustache ball 201 that is also attached to the balance stem 204 and vibrates as a unit, and a hairspring 202 attached via the mustache ball 201. 202 is fixed to a balance holder (not shown) via a beard holder 203. The upper shaft portion of the balance stem 204 (not shown) is rotatably supported, and the lower shaft portion of the balance core 204 is rotatably supported by the main plate 102, whereby the main plate 102 and the balance holder are The balance with hairspring 200 is rotatably supported, and the balance with hairspring 200 obtains energy from the ankle 3, and repeats continuous forced vibration at a frequency determined substantially in accordance with Equation 1 described above.

(Wheel)
Next, the balance wheel to which the watch weight of this embodiment is assembled will be described. FIG. 4 is a perspective view of the balance wheel before assembling the watch weight in the present embodiment. The balance wheel 210 includes a hub 216 having a stem insertion hole 214 to which the balance stem 204 is attached, and an annular rim 211 centering on the crown insertion hole 214, and the rim 211 extends from the crown insertion hole 214 in the radial direction. It is connected to the hub 216 via an amida (arm) 212.
Four amidas 212 are provided radially around the balance stem 210 and are arranged at equal intervals. The rim 211 is provided with eight watch weight attachment holes 213 for attaching the watch weight 300 at equal intervals. The watch weight mounting hole 213 includes four watch weight mounting holes 213 provided at the connecting portion between the amider 212 and the rim 211, and four more watch weights provided between the four watch weight mounting holes 213. It is comprised with the attachment hole 213. FIG.

(Clock weight)
Next, the watch weight of this embodiment will be described. FIG. 5 is a perspective view of the timepiece weight in the present embodiment, FIG. 6A is a plan view of the timepiece weight in the present embodiment, and FIG. 6B is the present embodiment. FIG. 6C is a front view of the timepiece weight in the embodiment, and FIG. 6C is a side view of the timepiece weight in the present embodiment.

  The timepiece weight 300 has a pin 303 that is tapered at the tip, and a body portion 301 that is larger in the radial direction than the pin 303. The trunk portion 301 is provided with a push seat 302 on an upper surface 306 opposite to the lower surface 307 on which the pin 303 is formed. When the pin 303 is inserted into the timepiece weight mounting hole 213 of the balance wheel 210, the push seat 302 serves as a seat surface that receives a pressing force of a jig (not shown). The body portion 301 has a first side surface 308 and a second side surface 309 with which an adjustment jig contacts when adjusting a watch weight 300 described later, and an upper surface 306 intersecting an axis 215 passing through the center of the pin 303, and an upper surface 306. A lower surface 307 that defines a thickness in the direction of the axis 215 between the lower surface 307 and the rim 211. The pin 303 protrudes from the lower surface 307 and is formed to extend in a direction perpendicular to the push seat 302. The pin 303 and the body portion 301 are manufactured by integral molding or by pressing the pin 303 into the body portion 301. Moreover, you may assemble the pin 303 and the trunk | drum 301 so that mutual rotation is possible.

  The upper surface 306 is formed with a gradient angle θ with respect to the lower surface 307 in a side view. The thickness between the upper surface 306 and the lower surface 307 on the right side of the shaft 215 in FIG. 6C is set larger than the thickness on the left side with the shaft 215 interposed therebetween. By setting the magnitude of the gradient angle θ, the difference between the thickness on the right side and the thickness on the left side can be increased. The right end is referred to as the thickest portion 304, and the left end is referred to as the thinnest portion 305. As described above, the inclined shape having the gradient angle θ is provided so that the watch weight 300 satisfies the weight balance for realizing the desired inertia moment adjustment range. The upper surface 306 is formed in one plane. Note that the upper surface 306 may be formed as a curved surface. Further, the first side surface 308 and the second side surface 309 are formed at positions different from the thickest portion 304 and the thinnest portion 305, and the line segment orthogonal to the first side surface 308 and the second side surface 309 is the thickest portion. It is formed so as to be substantially orthogonal to a plane including 304 and the thinnest portion 305. The cross section including the thinnest part 304, the thinnest part 305, and the shaft 215 is formed to have a trapezoidal shape with the thinnest part 305 and the thickest part 304 as the upper and lower bases, respectively, except for the push seat 302. .

Next, a method for adjusting the watch weight will be described. As shown in FIG. 3, the pin 303 is press-fitted and attached so as to be rotatable about the shaft 215 at a torque weight attachment hole 213 of the balance wheel 210 that is greater than the torque that does not rotate during forced vibration of the balance 200. The push seat 302 is attached by being pushed in the axial direction of the pin 303 with a jig (not shown).
Here, in order to adjust the moment of inertia I with respect to the hairspring 202 having a constant substantially spring constant k in the mathematical formula 1, as shown in FIG. 2 and FIG. By rotating the weight 300 about the shaft 215, the moment of inertia of the balance with hairspring 200 can be increased or decreased. That is, when the thinnest part 305 of the watch weight 300 is set so as to be radially away from the balance with respect to the balance of the balance with the balance, the moment of inertia of the balance 200 becomes small, and conversely, the thickest part 304 of the watch weight 300 is reduced to the balance. When it is set to be away from the center of rotation in the radial direction, the moment of inertia of the balance with hairspring 200 can be increased.
At this time, the moment of inertia I is adjusted by grasping the first side surface 308 and the second side surface 309 with a sandwiching jig (not shown) and rotating around the shaft 215. Since the pinching jig does not damage the thickest portion 304 and the thinnest portion 305 having a difference in weight, even if the rotation adjustment of the trunk portion 301 is repeated, the moment of inertia between the plurality of watch weights 300 is reduced. Variation in values can be suppressed.

  According to this embodiment, since the shape of the balance wheel 210 is simple, the shape processing of the balance wheel 210 is facilitated. Further, it is possible to provide the balance with hairspring 200 that can easily adjust the vibration cycle and can obtain a desired moment of inertia adjustment range by changing the gradient angle θ of the watch weight 300.

  In the present embodiment, the pin 303 is provided on the watch weight 300, but may be provided on the balance wheel 210.

  Further, the shaft 215 of the present embodiment is provided in parallel to the axis of the balance stem 204, but as shown in FIG. 7, the shaft 215 is at least 0 degree and less than 90 degrees with respect to the true axis direction. It is also possible to provide the mounting angle α within the range. With such a configuration, the stacking direction of the balance wheel 210 and the body portion 301 is inclined with respect to the axial direction of the balance stem 204, so that the height of the thickest portion 304 can be suppressed. Therefore, it can suppress contacting the component of the movement arrange | positioned at the upper and lower sides of the balance wheel 210. FIG. Therefore, the swing angle of the balance can be secured.

  Furthermore, although it has been described that eight watch weight mounting holes 213 of the present embodiment are provided in the rim 211 of the balance wheel 210, the number of watch weights 300 is not limited as long as a desired moment of inertia adjustment range is satisfied. . The balance wheel shape of the present embodiment is not limited to the shape of the balance wheel 210, but may be any balance wheel shape that allows the setting of the watch weight mounting portion and the adjustment of the watch weight 300.

  In this embodiment, only a movement and a mechanical timepiece equipped with a club tooth lever escapement using an ankle are described. However, the present invention is not limited to this, and can be used for a movement and a mechanical timepiece as long as the above-described balance can be provided.

(Second Embodiment)
Next, the timepiece weight in the second embodiment will be described with reference to FIGS. 8 and 9. A description of the same configuration, operation, and effect as those in the first embodiment will be omitted. FIG. 8 is a perspective view of the watch weight in this embodiment, FIG. 9A is a plan view of the watch weight in this embodiment, and FIG. 9B is this embodiment. FIG. 9C is a side view of the timepiece weight in the present embodiment.

The watch weight 410 is formed on one end side of the pin 303 and has a body portion 411 that is larger in the radial direction than the pin 303. The body portion 411 forms a stepped upper surface with an upper stage 414, a first middle stage 412 a, a second middle stage 412 b, and a lower stage 415 that are perpendicular to the axis 215 passing through the center of the pin 303. Moreover, it has the 1st side surface 418 and the 2nd side surface 419 which an adjustment jig | tool can contact at the time of adjustment of the timepiece weight 410 similarly to 1st Embodiment. The thickness in the axis 215 direction of the body 411 with the lower surface 417 as a reference gradually decreases in the order of upper stage 414 → first middle stage 412a → second middle stage 412b → lower stage 415.
The first middle stage 412a and the second middle stage 412b can also serve as a push seat that is pushed in by a jig when the pin 303 is attached to the balance wheel 210. In plan view, the respective ends of the upper stage 414, the first middle stage 412 a, the second middle stage 412 b, and the lower stage 415 face the first side surface 418 and the second side surface 419.
The stepwise and stepwise change in the thickness of the body 411 from the upper stage 414 to the lower stage 415 is provided so that the weight for watch 410 satisfies a weight balance for realizing a desired moment of inertia adjustment range.

  According to the present embodiment, as with the first embodiment, since the balance wheel has a simple shape, the shape processing of the balance wheel is facilitated. Further, by changing the thickness of the body part 411 stepwise from the upper stage 414 to the lower stage 415, the mass deviation of the body part can be increased with respect to the inclined shape of the body part 301 of the first embodiment. . Therefore, the inertia moment adjustment range can be set larger without changing the thickness of the thickest portion of the body 411 in the axis 215 direction.

  In the present embodiment, the stepwise change in the thickness of the body 411 from the upper stage 414 to the lower stage 415 is provided in four stages, but the present invention is not limited to this. For example, the first middle stage 412a and the second middle stage 412b can be configured by one plane to form a three-stage upper surface. Further, by adding a third middle stage, a five-stage upper surface can be formed. That is, it is only necessary to satisfy a desired desired moment of inertia adjustment range.

(Third embodiment)
Next, the timepiece weight in the third embodiment will be described with reference to FIGS. 10 and 11. A description of the configuration, operation, and effects that are the same as those in the first or second embodiment will be omitted. FIG. 10 is a perspective view of the timepiece weight in the present embodiment, FIG. 11A is a plan view of the timepiece weight in the present embodiment, and FIG. 11B is the present embodiment. FIG. 11C is a side view of the timepiece weight in the present embodiment.

The watch weight 520 is formed on one end side of the pin 303 and has a body portion 521 that is larger in the radial direction than the pin 303. The body 521 has a flat part 522 having a flat part upper surface 522a orthogonal to the axis 215 passing through the center of the pin 303, a substantially bean-shaped convex part 524 having a convex part upper surface 524a perpendicular to the axis 215, and A substantially bean-shaped recess 525 having a recess upper surface 525a is provided. As shown in FIGS. 10 and 11, the convex portion 524 is formed such that the thickness of the body 521 up to the convex upper surface 524 a with respect to the lower surface 527 is thicker than the thickness of the flat upper surface 522 a with respect to the lower surface 527. The recess 525 is recessed such that the thickness of the body 521 up to the recess upper surface 525a with respect to the lower surface 527 is thinner than the thickness of the lower surface 527 and the flat upper surface 522a with reference. The protrusion of the protrusion 524 and the recess of the recess 525 are provided so that the watch weight 520 satisfies a weight balance that realizes a desired inertia moment adjustment width.
Further, the convex portion 524 and the concave portion 525 are formed so as to fit in the outer shape of the trunk portion 521 in a plan view. When the body 521 is rotated and adjusted with respect to the balance wheel 210, only the body 521 can be sandwiched by the sandwiching jig, so that the deterioration of the projections 524 and the recesses 525 can be suppressed. The convex part 524 and the concave part 525 are formed along an arc whose center is the axis 215. By adjusting the length along the arc, the adjustment range of the moment of inertia can be further increased or decreased.

  According to this embodiment, since the balance wheel has a simple shape, the shape processing of the balance wheel is facilitated. Further, by changing the shape of the convex portion 524 and the concave portion 525, a balance with a desired adjustment of the moment of inertia and easy adjustment of the vibration period can be supplied.

  In addition, in this embodiment, although the convex part 524 and the recessed part 525 are shown by the substantially bean shape, it is not restricted to this, It uses the space around the planar direction of the convex part 524 and the recessed part 525, and shapes suitably. Can change. If the inertia moment adjustment range can be changed, the shape is not limited. In the present embodiment, the convex portion 534 and the concave portion 535 are arranged symmetrically in the axial rotation direction, but may be asymmetric if the arrangement satisfies a desired moment of inertia adjustment range.

(Fourth embodiment)
Next, the timepiece weight in the fourth embodiment will be described with reference to FIGS. 12, 13 and 14. A description of the same configuration, operation, and effect as those in the first to third embodiments is omitted. FIG. 12 is an exploded perspective view of the watch weight in this embodiment, and FIG. 13 is a perspective view of the watch weight member B in this embodiment as seen from the lower surface side. ) Is a plan view of the watch weight in this embodiment, FIG. 14B is a front view of the watch weight in this embodiment, and FIG. 14C is this embodiment. It is a side view of the weight for timepieces in.

  The watch weight 630 is formed on one end side of the pin 303 and has a member A630a having a member A body 631a larger in the radial direction than the pin 303 and a mounting pin 633 formed by a mounting hole 632 formed in a recess in the member A upper surface 636a. It is comprised by member B630b which has the substantially fan-shaped trunk | drum 631b connected on the member A upper surface 636a through. Here, the thickness of the member B lower surface 637b to the member B upper surface 636b is provided so as to satisfy the weight balance that allows the watch weight 630 to realize a desired inertia moment adjustment range.

  The thickness of the member A 630 a is the same except for the attachment hole 632. Further, the member A 630a is formed rotationally symmetric about the axis 215. The mounting hole 632 is formed to be recessed from the other upper surface, and the mounting pin 633 of the member B 630b is fitted therein. The thickness of the member B 630 b is uniformly formed to the same thickness except for the mounting pin 633. When the lower surface of the member B 630b is combined with the upper surface of the member A 630a, the distance between the upper surface 636b of the member B 630b and the lower surface 637a of the member A 630a is set larger than the distance between the upper surface 636a and the lower surface 637a of the member A 630a. Note that when the upper surface 636a of the member A 630a is referred to as a first upper surface and the upper surface 636b of the member B 630b is referred to as a second upper surface, the first upper surface and the second upper surface are different members A630a and B630b.

  According to this embodiment, since the balance wheel has a simple shape, the shape processing of the balance wheel is facilitated. Further, a desired moment of inertia adjustment range can be obtained with only a minimum change of changing the shape of the component B 630b. In addition, the member A 630a and the member B 630b can be made of materials having different specific gravities. If the member B630b is made of a material having a specific gravity greater than that of the member A630a, the adjustment range of the moment of inertia can be set larger.

  In the present embodiment, the member A 630a is arranged so that the member B 630b can be mounted on the upper surface of the member A 630a. However, the present invention is not limited to this. The member B can also be assembled from the radial side of the shaft 215. If the balance of the center of gravity after the timepiece weights are assembled is set so as to satisfy the desired moment of inertia adjustment range, various changes can be made.

  In this embodiment, the watch weight is composed of two members. However, the present invention is not limited to this, and a third member may be attached by further providing a mounting hole on the upper surface of the member B630b. Is possible. It is also possible to arrange the third member so as to be placed directly on the member A in parallel with the member B. The center-of-gravity balance after assembling the watch weight only needs to be set so as to satisfy a desired moment of inertia adjustment range.

(Fifth embodiment)
Next, a timepiece weight in the fifth embodiment will be described with reference to FIG. Descriptions of configurations, operations, and effects that are the same as in the above-described embodiment are omitted. FIG. 15 is a perspective view of a watch weight in the present embodiment. The first embodiment differs from the first embodiment in that the first side surface and the second side surface of the first embodiment are parallel to each other, whereas the first side surface and the second side surface of the present embodiment are inclined with respect to each other. It is a point that is configured as.

  In the present embodiment, a first side surface 708 that connects the thickest part 704 that is one side surface of the body part 701 and the thinnest part 705 that is the other side surface, and the thickest part on one side of the body part 701. A first side surface 708 and a second side surface 709 facing the opposite side across a virtual line R passing through the portion 704 and the thinnest portion 705 on the other side, and the first side surface 708 is one side of the virtual line R The distance from the second side surface 709 decreases as the distance from the (thickest part 704 side) to the other side (thinnest part 705 side) approaches. Further, the upper surface 706 and the lower surface 707 of the body 708 are formed to be inclined with respect to each other as in the first embodiment. The imaginary line R is a straight line that intersects the central axis 215 of the pin 303. With such a configuration, it is possible to obtain a larger balance with the balance of inertia of the balance with respect to the adjustment angle of the watch weight 700 than in the first embodiment.

  The present invention is not limited to the above-described first to fifth embodiments, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention. For example, in all of the above-described embodiments, a mechanical timepiece having a barrel wheel having a spring (not shown) as a power source has been described. However, the present invention is not limited to this, and the scope of the present invention is not deviated. It can be applied to all watches with different power sources.

  For example, the stepped shape of the second embodiment can be applied to the upper surface having a gradient angle θ with respect to the lower surface of the first embodiment. That is, each of the upper stage 414, the first middle stage 412a, the second middle stage 412b, and the lower stage 415, or two or more faces can be formed as a plane having a gradient angle θ with respect to the lower surface. Moreover, the convex part 524 and the recessed part 525 of 3rd Embodiment can also be formed in the upper surface which has gradient angle (theta). In addition, the first upper surface 636a of the member A 630a and the second upper surface 636b of the member B 630b of the fourth embodiment can be formed so as to have a gradient angle θ with respect to the lower surface.

Further, for example, the convex portion 524 and the concave portion 525 of the third embodiment can be formed on the stepped upper surface of the second embodiment. In this case, the convex portion 524 and the concave portion 525 can be formed in any one of the upper stage 414, the first middle stage 412a, the second middle stage 412b, and the lower stage 415, but the upper stage 414, the first middle stage 412a, or both The convex portion 524 may be formed, and the concave portion 525 may be formed in one or both of the second middle stage 412b and the lower stage 415. Further, each of the upper stage 414, the first middle stage 412a, the second middle stage 412b, and the lower stage 415, or two or more stages may be constituted by different members like the members A and B of the fourth embodiment. it can.
For example, the convex part 524 of 3rd Embodiment can also be comprised by another member like 4th Embodiment.
Further, for example, by forming the push seat 702 of FIG. 15 of the fifth embodiment so as to be perpendicular to the upper surface 706 of the body 701, the mounting pin 633 of the member B 630b of the fourth embodiment is fitted. You can also.

2 escape wheel 3 ankle 100 watch (mechanical watch)
DESCRIPTION OF SYMBOLS 101 Movement 105 Front train wheel 110 Incense cart 200 Balance 202 Hairspring 204 Spring stem 207 Rolling stone 210 Balance wheel 211 Rim 212 Amida 214 Spring insertion hole 215 Shaft 216 Hub 300, 410, 520, 630, 700 Clock weight 301, 411, 521, 631, 701 Body 302, 702 Push seat 303 Pin 304 Thickest part 305 Thinnest part 306 Upper surface 307, 417, 527 Lower surface 412a First middle stage 412b Second middle stage 414 Upper stage 415 Lower stage 522 Flat part 522a Flat part Upper surface 524 Convex part 524a Convex part upper surface 525 Concave part 525a Concave part upper surface 630a Member A
630b Member B
631a Member A body 631b Member B body 632 Mounting hole 633 Mounting pin 636a Member A upper surface 636b Member B upper surface 637a Member A lower surface 637b Member B lower surface θ Gradient angle α Mounting angle

Claims (9)

A timepiece weight provided on a balance for time regulation and adjusting the moment of inertia of the balance.
Having a body portion rotatably provided around an axis provided in the balance with hairspring;
The barrel portion has a lower surface that intersects the axis, and an upper surface that defines the axial thickness of the barrel portion between the lower surface,
A timepiece weight in which the thickness on one side in the radial direction with respect to the shaft is different from the thickness on the other side.   The timepiece weight according to claim 1, wherein the upper surface has a predetermined gradient angle with respect to the lower surface.   The timepiece weight according to claim 1, wherein the upper surface has a shape in which the distance in the axial direction from the lower surface changes stepwise.   4. The timepiece weight according to claim 1, wherein the upper surface includes a convex portion on one side in a radial direction with the axis as a boundary, and a concave portion on the other side. 5.   4. The timepiece weight according to claim 3, wherein the upper surface has a first upper surface and a second upper surface that are different in distance from the lower surface, and the first upper surface and the second upper surface are made of different members. A first side surface connecting the side surface on the one side and the side surface on the other side of the body portion;
Having a second side surface opposite to the first side surface across an imaginary line passing through the one side and the other side of the body portion;
The said 1st side surface is formed so that the distance with the said 2nd side surface may become short as it approaches the said other side from the said one side of the said virtual line. Clock weight.   The timepiece weight according to claim 1, wherein the shaft has an attachment angle that forms a predetermined inclination with respect to a true shaft direction provided on a rotation shaft of the balance with hairspring.   A barrel wheel having a power source, a train wheel that transmits a rotational force of the barrel wheel, and an escapement speed control mechanism that controls rotation of the train wheel, wherein the escapement speed control mechanism is claimed in claim 1. A watch movement having a balance with the watch weight described.   A timepiece having the timepiece movement according to claim 8.

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