Movements and clocks

Abstract

To provide a movement and watch that can operate the winding mechanism even when subjected to shock. [Solution] The device comprises a barrel wheel for housing a mainspring, a rotor 31 that generates mechanical energy to wind the mainspring by rotating, a ball bearing shaft 500 that constitutes the rotation axis of the rotor 31 and has a first engaging portion 510 on its outer circumference, an inner ring 321 having an insertion hole 321c into which the ball bearing shaft 500 is inserted and a second engaging portion 520 that fastens with the first engaging portion 510 is provided on the inner circumference of the insertion hole 321c, an outer ring 322 that is rotatably supported relative to the inner ring 321 and fixed to the rotor 31, and a plurality of balls 323 that are arranged between the inner ring 321 and the outer ring 322 and assist the rotation of the outer ring 322 relative to the inner ring 321, wherein a first coating 610 whose main component is titanium is formed on the surface of at least one of the first engaging portion 510 and the second engaging portion 520.

Description

[Technical Field]

[0001] The present invention relates to a movement and a timepiece. [Background Art]

[0002] Patent Document 1 discloses a configuration of a timepiece including an automatic winding mechanism that winds a mainspring via a transmission member that transmits rotation when an oscillating weight rotates. The oscillating weight is rotatably supported on the movement using a bearing and a screw that fixes the bearing. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2024-126255 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, in the configuration described in Patent Document 1, when a large external force is applied to the oscillating weight, such as when the timepiece is dropped, and the screw that supports the oscillating weight loosens, the power of the oscillating weight cannot be transmitted properly, leading to the problem that the automatic winding mechanism stops functioning. [Means for Solving the Problem]

[0005] The movement comprises a barrel wheel for housing a mainspring, a rotor that generates mechanical energy to wind the mainspring by rotating, a shaft member that constitutes the rotation axis of the rotor and has a first engaging portion on its outer circumference, a first bearing member having an insertion hole into which the shaft member is inserted and a second engaging portion that engages with the first engaging portion provided on the inner circumference of the insertion hole, a second bearing member that is rotatably supported with respect to the first bearing member and fixed to the rotor, and a plurality of rolling elements arranged between the first bearing member and the second bearing member to assist the rotation of the second bearing member relative to the first bearing member, wherein a first coating whose main component is titanium is formed on the surface of at least one of the first engaging portion and the second engaging portion.

[0006] The watch comprises the movement described above and a case for housing the movement. [Brief explanation of the drawing]

[0007] [Figure 1] A plan view showing the configuration of the front side of the clock. [Figure 2] A plan view showing the configuration of the back of the clock. [Figure 3] A perspective view showing the configuration of the back of the watch. [Figure 4] A plan view showing the configuration of the reverse side of the movement. [Figure 5] A cross-sectional perspective view showing the structure of the reverse side of the movement. [Figure 6] A cross-sectional view of the movement along line AA shown in Figure 4. [Figure 7] A cross-sectional view of the movement along the BB line shown in Figure 4. [Figure 8] A cross-sectional view showing the configuration of the rotary weight support mechanism, which is part C shown in Figure 6. [Figure 9] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 1. [Figure 10] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 2. [Figure 11] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 3. [Figure 12]A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 4. [Figure 13] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 5. [Figure 14] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 6. [Figure 15] A cross-sectional view showing the configuration of the rotary weight support mechanism in modified example 7. [Modes for carrying out the invention]

[0008] The configuration of movement 10 and clock 1 will be explained below with reference to the diagrams. In the following diagrams, the three mutually orthogonal axes will be described as the X-axis, Y-axis, and Z-axis. The direction along the X-axis will be called the "X-direction," the direction along the Y-axis will be called the "Y-axis direction," and the direction along the Z-axis will be called the "Z-axis direction." The direction of the arrow is the + direction, and the direction opposite to the + direction is the - direction. A plan view from the Z-axis direction is also simply called a "plan view."

[0009] First, the configuration of the movement 10 and the clock 1 will be explained with reference to Figures 1 to 8. Note that although the clock 1 in this embodiment is described as an electronically controlled mechanical clock, it is not limited to this and may be a mechanical clock.

[0010] As shown in Figures 1 to 3, the watch 1 includes an outer case 2, which is a cylindrical case. The dial 3 is positioned on the inner circumference of the outer case 2.

[0011] Of the two openings in the outer case 2, the opening on the front side is covered with a cover glass (not shown). The opening on the back side is covered with a back cover 8. The back cover 8 consists of a ring-shaped frame 8A and a transparent back cover glass 8B attached to the frame 8A. A band is attached to the outer case 2.

[0012] A timepiece 1 comprises: a movement 10 housed in an exterior case 2; an hour hand 4A, a minute hand 4B, and a second hand 4C that indicate time information; and a power reserve hand 5 that indicates the remaining winding amount of a mainspring. A calendar aperture 3A is provided on a dial 3. A date wheel 6 is visible through the calendar aperture 3A.

[0013] As shown in FIG. 2 and FIG. 3, an opening 314 is formed in the rotating weight 31. The formation of the opening 314 reduces the likelihood that the power reserve hand 5 cannot be visually recognized depending on the position of the rotating weight 31.

[0014] A sector-shaped scale portion 12A is provided on the back surface of a disc-shaped train wheel bridge 12. The remaining winding amount of a mainspring 210 (see FIG. 6) can be displayed by the power reserve hand 5 indicating the scale portion 12A.

[0015] A crown 7 is provided on a side surface of the exterior case 2. The crown 7 can be pulled out from a 0-step position, where it is pushed toward the center of the timepiece 1, to a 1-step position and a 2-step position to move.

[0016] When the crown 7 is rotated at the 0-step position, as will be described later, the mainspring 210, which is a mechanical energy source provided in the movement 10, can be wound. The power reserve hand 5 moves in conjunction with the winding of the mainspring 210.

[0017] When the crown 7 is pulled to the 1-step position and rotated, a switching mechanism 50 switches the gear to which the rotation of the crown 7 is transmitted, allowing the date wheel 6 to be moved to adjust the date.

[0018] When the crown 7 is pulled to the 2-step position, the second hand 4C stops; when the crown 7 is rotated at the 2-step position, the switching mechanism 50 switches the gear to which the rotation of the crown 7 is transmitted, allowing the hour hand 4A and the minute hand 4B to be moved to adjust the time.

[0019] Next, the configuration of the movement 10 will be described with reference to FIG. 4 to FIG. 6.

[0020] As shown in Figure 4, the movement 10 includes a gear train 20 for time display, a winding mechanism 30, a switching mechanism 50, a power reserve mechanism 60, a generator 70, and a circuit section 80.

[0021] The gear train 20 for time display includes a mainspring 21, a second wheel 22 (see Figure 6), a third wheel 23, a fourth wheel 24, a fifth wheel 25, and a sixth wheel 26.

[0022] As shown in Figures 5 and 6, the barrel wheel 21 has a mainspring 210 and a barrel arbor 220. Specifically, the mainspring 210 is housed in the barrel wheel 21. The central end of the mainspring 210 is attached to the barrel arbor 220.

[0023] The barrel arsenal 220 is fitted with a ratchet wheel 211 that rotates integrally with the barrel arsenal 220. Therefore, by rotating the ratchet wheel 211, the mainspring 210, which is the source of mechanical energy, can be wound up. As the mechanical energy accumulated by winding the mainspring 210 rotates the barrel arsenal wheel 21, the second wheel 22, third wheel 23, fourth wheel 24, fifth wheel 25, and sixth wheel 26 rotate in sequence.

[0024] As shown in Figure 6, the second wheel 22 has a barrel pinion 28 attached to it. The fourth wheel 24 has a second hand shaft 29 attached to it. A barrel wheel 27 is positioned on the outer circumference of the barrel pinion 28, and the rotation of the barrel pinion 28 is transmitted to it via a date wheel (not shown).

[0025] The hour hand 4A, minute hand 4B, and second hand 4C are attached to the barrel wheel 27, barrel pinion 28, and second hand shaft 29, respectively. The sixth wheel 26 is meshed with a rotor pinion (not shown). When the sixth wheel 26 rotates, the rotor of the generator 70 rotates.

[0026] The winding mechanism 30 includes both a manual winding mechanism and an automatic winding mechanism.

[0027] As shown in Figure 4, the manual winding mechanism comprises a winding stem 13 to which the crown 7 is attached, a barrel wheel (not shown), a ratchet wheel 14, a round-hole wheel 15, a square-hole first transmission wheel 16, a square-hole second transmission wheel 17, and a square-hole third transmission wheel 18.

[0028] The second ratchet gear 17 has a separate pinion and gear arranged coaxially and rotates as a single unit. The third ratchet gear 18 meshes with the pinion of the gear 35, which will be described later. Therefore, by rotating the crown 7, the ratchet gear 211 and the barrel arbor 220 rotate via the gear 35, and the mainspring 210 is wound.

[0029] As shown in Figure 6, the automatic winding mechanism comprises a rotor 31, a bearing 32, an eccentric gear 33 (see Figure 4), a pawl lever 34, and a transmission wheel 35. The automatic winding mechanism winds the mainspring 210 by the rotation of the rotor 31.

[0030] As shown in Figure 2, the rotor 31 comprises a weight portion 311 and a weight portion 312. The weight portion 311 is formed in a thin plate shape and includes a central shaft portion 313 fixed to the bearing 32 and an opening 314. The weight portion 312 is formed continuously around the outer circumference of the weight portion 311 and is thicker than the weight portion 311. The rotor 31 is formed integrally with the weight portion 311 and the weight portion 312.

[0031] The bearing 32 is a bearing that rotatably supports the rotor weight 31. As shown in Figure 6, the bearing 32 comprises an inner ring 321 as a first bearing member fixed to the gear train support 12, an outer ring 322 as a second bearing member that rotates integrally with the rotor weight 31, and balls 323 as rolling elements positioned between the inner ring 321 and the outer ring 322. A gear 322A is formed on the outer circumferential surface of the outer ring 322.

[0032] As shown in Figure 7, the eccentric gear 33 meshes with the gear 322A of the bearing 32 and rotates in both forward and reverse directions in conjunction with the rotation of the rotor 31. The eccentric gear 33 is attached to the gear support portion 43 of the eccentric shaft member 40. The eccentric gear 33 rotates together with the eccentric shaft member 40, with the rotating shaft portion 42 of the eccentric shaft member 40 as its axis of rotation. In other words, the rotating shaft portion 42 is the axis of rotation for both the eccentric gear 33 and the eccentric shaft member 40.

[0033] As shown in Figure 4, the claw lever 34 comprises a main body portion 341, a pull claw 342 extending from the main body portion 341 with its end engaging with the drive wheel 35, and a push claw 343 extending from the main body portion 341 with its end engaging with the drive wheel 35.

[0034] Next, the configuration of the rotor support mechanism 1000, including the rotor 31 and bearing 32, will be described with reference to Figure 8.

[0035] As shown in Figure 8, the rotor support mechanism 1000 includes a rotor 31, a ball bearing shaft 500 as a shaft member, a bearing 32, and a retaining ring 530 as a third bearing member.

[0036] The rotor 31 generates mechanical energy to wind the mainspring 210 by rotating. The ball bearing shaft 500 constitutes the rotation axis of the rotor 31 and is supported by the gear train bearing 12. A first engaging portion 510 is provided on the outer circumference of the ball bearing shaft 500. In this embodiment, the first engaging portion 510 is located on the outer surface of the shaft portion of the ball bearing shaft 500 that extends along the -Z direction from the support portion supported by the gear train bearing 12.

[0037] As described above, the bearing 32 is a bearing that rotatably supports the rotor 31, and has an inner ring 321, an outer ring 322, and a ball 323 disposed between the inner ring 321 and the outer ring 322.

[0038] The inner ring 321 is formed in a substantially cylindrical shape and has an outer circumference and an inner circumference. A second engaging portion 520 is provided on the inner circumference of the inner ring 321. The second engaging portion 520 of the inner ring 321 engages with and fastens the first engaging portion 510 of the ball bearing shaft 500. In other words, in this embodiment, the inner ring 321 has a through hole 321c through which the first engaging portion 510 of the ball bearing shaft 500 is inserted, and the second engaging portion 520 is arranged on the inner surface of the through hole 321c, which is the inner circumference. The inner ring 321 is fixed to the retaining ring 530.

[0039] The outer ring 322 is rotatably supported relative to the inner ring 321 and fixed to the rotor 31. That is, the outer ring 322 rotates together with the rotor 31. Multiple balls 323 are provided to assist the rotation of the outer ring 322 relative to the inner ring 321.

[0040] In this embodiment, a first coating 610, whose main component is titanium, is formed on the surface of the second engaging portion 520 of the inner ring 321. The first coating 610 is, for example, TiCN (titanium carbon nitride). The thickness of the first coating 610 is, for example, 2.0 μm to 4.0 μm.

[0041] As a method for forming the first coating 610, for example, a vacuum deposition method can be used. Specifically, for example, Ti-based fine particles are attached during deposition. However, the method is not limited to vacuum deposition, and other methods such as spin coating, dipping, brush coating, spray coating, electrostatic coating, electrodeposition coating, etc., wet plating methods such as electrolytic plating, immersion plating, electroless plating, etc., chemical deposition methods (CVD) such as thermal CVD, plasma CVD, laser CVD, dry plating methods (vapor phase deposition methods) such as sputtering, ion plating, etc., and thermal spraying may also be used.

[0042] In this way, by forming the first coating 610 on the surface of the second engaging portion 520, the coefficient of friction of the surface of the female thread, which is the second engaging portion 520, can be increased. Therefore, when the female thread, which is the second engaging portion 520 of the inner ring 321, is engaged with the male thread, which is the first engaging portion 510 of the ball bearing shaft 500, and the screw is tightened, that is, when fastened, the gripping force between the second engaging portion 520 and the first engaging portion 510 can be improved. In other words, it is possible to prevent the inner ring 321 having the second engaging portion 520 from loosening relative to the ball bearing shaft 500 having the first engaging portion 510.

[0043] As described above, the movement 10 of this embodiment comprises a barrel wheel 21 that houses a mainspring 210, a rotor 31 that generates mechanical energy to wind the mainspring 210 by rotating, a ball bearing shaft 500 that constitutes the rotation axis of the rotor 31 and has a first engaging portion 510 on its outer circumference, an inner ring 321 that has an insertion hole 321c into which the ball bearing shaft 500 is inserted and has a second engaging portion 520 that fastens with the first engaging portion 510 and is provided on the inner circumference of the insertion hole 321c, an outer ring 322 that is rotatably supported relative to the inner ring 321 and fixed to the rotor 31, and a plurality of balls 323 that are arranged between the inner ring 321 and the outer ring 322 and assist the rotation of the outer ring 322 relative to the inner ring 321, and a first coating 610 whose main component is titanium is formed on the surface of at least one of the first engaging portion 510 and the second engaging portion 520.

[0044] With this configuration, since a first coating 610, whose main component is titanium, is formed on the surfaces of the first engaging portion 510 and the second engaging portion 520, it is possible to increase the coefficient of friction on the surface, and the gripping force can be improved when the first engaging portion 510 and the second engaging portion 520 are fastened together. Therefore, even if a large external force is applied to the rotor 31, such as when the watch 1 falls, it is possible to prevent the inner ring 321 from loosening, and the automatic winding mechanism can function. In addition, since the first engaging portion 510 and the second engaging portion 520 are fastened and fixed together, maintainability, such as disassembly work during repairs, can be ensured compared to cases where adhesive or the like is used for fixing. Furthermore, since the tightening force is increased by using the first coating 610, loosening can be suppressed without increasing the size of the parts including the first engaging portion 510 or the parts including the second engaging portion 520.

[0045] Furthermore, in the movement 10 of this embodiment, it is preferable that the first coating 610 is formed only on the surface of the second engagement portion 520 of the inner ring 321. With this configuration, since the first coating 610 is formed on the surface of the second engagement portion 520, it is possible to increase the surface friction coefficient, and the gripping force can be improved when the first engagement portion 510 and the second engagement portion 520 are fastened together. In this embodiment, the statement that the first coating 610 is formed only on the surface of the second engagement portion 520 means that the first coating 610 is formed only on the second engagement portion 520 out of the entire surface of the ball bearing shaft 500 and the entire surface of the inner ring 321, and also includes a configuration in which the first coating is formed on a part of the surface of watch components other than the ball bearing shaft 500 and the inner ring 321, for example, the outer ring 322.

[0046] Furthermore, the watch 1 of this embodiment comprises the movement 10 described above and an outer case 2 that houses the movement 10. With this configuration, it is possible to provide a watch 1 that is capable of the automatic winding mechanism functioning properly.

[0047] The following describes some variations of the embodiments described above.

[0048] As described above, the first coating 610 is not limited to being formed on the second engaging portion 520, but may also be formed on the portions shown in Figures 9 to 15.

[0049] As shown in Figure 9, in the modified example 1 of the rotary weight support mechanism 1000A, the first coating 610 is formed on the entire surface of the inner ring 321. Since the first coating 610 is formed on the entire surface of the inner ring 321 in this way, the fastening force of the inner ring 321 to the ball bearing shaft 500 can be increased. In other words, it is possible to increase the coefficient of friction of the surface of the inner ring 321, and the gripping force can be improved when the first engaging portion 510 and the second engaging portion 520 are fastened together.

[0050] As described above, in the rotary weight support mechanism 1000A of the modified example 1, it is preferable that the first coating 610 is formed on the entire surface of the inner ring 321, including the surface of the second engaging portion 520. With this configuration, since the first coating 610 is formed on the entire surface of the inner ring 321, it is not necessary to cover the second engaging portion 520 with a mask, compared to the case where the first coating 610 is formed only on the second engaging portion 520, and the manufacturing method can be simplified. In addition, since the first coating 610 is not formed on the side of the first engaging portion 510, costs can be reduced.

[0051] Furthermore, as shown in Figure 10, in the modified example 2 of the rotor support mechanism 1000B, the first coating 610 is formed on the surface of the inner ring 321, excluding the contact surface 321a that contacts the ball 323. If the first coating 610 is formed on the contact surface 321a, the contact surface 321a becomes a sliding part, and wear of the first coating 610 can reduce the rotational efficiency of the bearing 32. However, since the first coating 610 is not formed on the contact surface 321a, the reduction in the rotational efficiency of the bearing 32 can be suppressed.

[0052] As described above, in the rotary weight support mechanism 1000B of the modified example 2, the inner ring 321 has a contact surface 321a that contacts a plurality of balls 323, and it is preferable that the first coating 610 is formed on the surface of the inner ring 321, including at least the surface of the second engagement portion 520, excluding the contact surface 321a. With this configuration, the first coating 610 is formed on the surface excluding the contact surface 321a, in other words, the first coating 610 is not formed on the contact surface 321a that contacts the balls 323, so it is possible to suppress the abrasion of the first coating 610 and suppress the effect on the rotation of the rotary weight 31.

[0053] Furthermore, as shown in Figure 11, in the modified example 3 of the rotor support mechanism 1000C, the first coating 610 is formed on the surface of the inner ring 321, excluding the mating surface 321b that engages with the retaining ring 530. In other words, the first coating 610 is not formed on the portion of the inner ring 321 surface that is in a press-fit relationship. In this way, since the first coating 610 is not formed on the surface of the inner ring 321, excluding the mating surface 321b, it is possible to suppress the influence on press-fitting when press-fitting the inner ring 321 into the retaining ring 530, and the retaining ring 530 and the inner ring 321 can be assembled.

[0054] As described above, in the rotary weight support mechanism 1000C of the modified example 3, it is preferable that the mechanism further comprises a retaining ring 530 having an opening hole 530a that fits with the inner ring 321, and the inner ring 321 is fitted into the opening hole 530a and fixed to the inner ring 321, the inner ring 321 having a fitting surface 321b that fits with the retaining ring 530, and the first coating 610 is formed on the surface of the inner ring 321, excluding the fitting surface 321b, and including at least the surface of the second engaging portion 520. With this configuration, since the first coating 610 is formed on the surface excluding the fitting surface 321b, for example, when pressing the retaining ring 530 onto the fitting surface 321b of the inner ring 321 and fixing it, it is possible to prevent the retaining ring 530 from becoming unable to be pressed in.

[0055] Furthermore, as shown in Figure 12, in the modified example 4, the rotor support mechanism 1000D has the first coating 610 formed only on the first engagement portion 510 of the ball bearing shaft 500. Because the ball bearing shaft 500 is a relatively small part, it is difficult to uniformly form the first coating 610 over the entire surface. However, by concentrating the formation of the first coating 610 only on the first engagement portion 510, variations in the thickness of the first coating 610 can be suppressed. In addition, since the first engagement portion 510 is a part that is not visible from the outside, different finishing treatments can be applied to the visible parts. In this modified example, the statement that the first coating 610 is formed only on the surface of the first engagement portion 510 means that the first coating 610 is formed only on the first engagement portion 510 out of the entire surface of the ball bearing shaft 500 and the entire surface of the inner ring 321, and also includes configurations in which the first coating is formed on the surfaces of watch components other than the ball bearing shaft 500 and the inner ring 321, for example, on a part of the surface of the dial 3.

[0056] As described above, in the rotary weight support mechanism 1000D of the modified example 4, it is preferable that the first coating 610 is formed only on the surface of the first engagement portion 510 of the ball bearing shaft 500. With this configuration, since the first coating 610 is formed only on the surface of the first engagement portion 510, it is possible to improve the fastening force when the first engagement portion 510 and the second engagement portion 520 are fastened together, and the loosening of the inner ring 321 can be suppressed.

[0057] Furthermore, as shown in Figure 13, in the modified example 5, the rotary weight support mechanism 1000E has the first coating 610 formed on the entire surface of the ball bearing shaft 500. Since the first coating 610 is formed on the entire surface of the ball bearing shaft 500 in this way, the fastening force of the inner ring 321 to the ball bearing shaft 500 can be increased. In other words, it is possible to increase the coefficient of friction of the surface of the ball bearing shaft 500, and the gripping force can be improved when the first engaging portion 510 and the second engaging portion 520 are fastened together.

[0058] As described above, in the rotary weight support mechanism 1000E of the modified example 5, it is preferable that the first coating 610 is formed on the entire surface of the ball bearing shaft 500, including the surface of the first engaging portion 510. With this configuration, since the first coating 610 is formed on the entire surface of the ball bearing shaft 500, it is possible to improve the tightening force when the first engaging portion 510 and the second engaging portion 520 are tightened, and the loosening of the inner ring 321 can be suppressed. In addition, since the first coating 610 is formed on the entire surface of the ball bearing shaft 500, it is not necessary to take measures such as masking a part of it, and the first coating 610 is easy to form.

[0059] Furthermore, as shown in Figure 14, in the modified example 6, the rotary weight support mechanism 1000F has the first coating 610 formed on both the entire surface of the ball bearing shaft 500 and the entire surface of the inner ring 321. In this way, since the first coating 610 is formed on the entire surface of both the ball bearing shaft 500 and the inner ring 321, a stronger fastening force can be obtained when the inner ring 321 is fastened to the ball bearing shaft 500. In addition, since the first coating 610 is formed on both parts, even if there is variation in the thickness of the first coating 610 on either part, it is possible to prevent the inner ring 321 from loosening.

[0060] As described above, in the rotary weight support mechanism 1000F of the modified example 6, it is preferable that the first coating 610 is formed on the surface of the first engaging portion 510 and the surface of the second engaging portion 520. With this configuration, since the first coating 610 is formed on both the entire surface of the ball bearing shaft 500 including the first engaging portion 510 and the entire surface of the inner ring 321 including the second engaging portion 520, it is possible to improve the tightening force when the first engaging portion 510 and the second engaging portion 520 are tightened, and the loosening of the inner ring 321 can be suppressed.

[0061] Furthermore, as shown in Figure 15, in the modified example 7, the rotor support mechanism 1000G has the first coating 610 formed only on the first engaging portion 510 of the ball bearing shaft 500 and the second engaging portion 520 of the inner ring 321. In this way, the first coating 610 is formed only on the first engaging portion 510 and the second engaging portion 520, and is formed only on the minimum necessary portion to be fastened, so that the first engaging portion 510 and the second engaging portion 520 can be firmly fastened together. Note that in this modified example, when it is said that the first coating 610 is formed only on the surface of the first engaging portion 510 and the surface of the second engaging portion 520, it means that the first coating 610 is formed only on the first engaging portion 510 and the second engaging portion 520 out of the entire surface of the ball bearing shaft 500 and the entire surface of the inner ring 321, and also includes a configuration in which the first coating is formed on a part of the surface of watch components other than the ball bearing shaft 500 and the inner ring 321, for example, a part of the surface of the outer case 2.

[0062] As described above, in the rotary weight support mechanism 1000G of modified example 7, it is preferable that the first coating 610 is formed only on the surface of the first engaging portion 510 and the surface of the second engaging portion 520. With this configuration, since the first coating 610 is formed only on the surface of the first engaging portion 510 and the surface of the second engaging portion 520, it is possible to improve the tightening force when the first engaging portion 510 and the second engaging portion 520 are tightened, and the loosening of the inner ring 321 can be suppressed.

[0063] Furthermore, as described above, the first coating 610 is not limited to being formed on the ball bearing shaft 500 or the inner ring 321, but may also be formed on the fastening components among the components constituting the movement 10.

[0064] Furthermore, in the portion where the first coating 610 is formed, the embodiments and modifications described above may be combined to the extent that it is physically possible to do so. [Explanation of Symbols]

[0065] 1...Watch, 2...Outer case, 3...Dial, 3A...Calendar window, 4A...Hour hand, 4B...Minute hand, 4C...Second hand, 5...Power reserve hand, 6...Date wheel, 8...Case back, 8A...Frame, 8B...Case back glass, 10...Movement, 12...Train bridge, 12A...Scale section, 13...Winding stem, 14...Drive wheel, 15...Round hole wheel, 16...First drive wheel, 17...Second drive wheel, 1 8... Third drive wheel with square hole, 20... Time display gear train, 21... Mainspring barrel, 22... Second wheel, 23... Third wheel, 24... Fourth wheel, 25... Fifth wheel, 26... Sixth wheel, 27... Barrel wheel, 29... Second hand shaft, 30... Winding mechanism, 31... Rotor, 32... Bearing, 33... Eccentric gear, 34... Pawl lever, 35... Drive wheel, 40... Eccentric shaft member, 42... Rotating shaft section, 43... Gear support section, 50... Switching mechanism, 6 0...Power reserve mechanism, 70...Generator, 80...Circuit section, 210...Mainspring, 211...Hole wheel, 220...Mainspring barrel, 311...Weight section, 312...Weight section, 313...Central shaft section, 314...Opening, 321...Inner ring as first bearing member, 321a...Contact surface, 321b...Matching surface, 321c...Through hole, 322...Outer ring as second bearing member, 322A...Gear, 323...Rolling Ball as the body, 341...Main body, 342...Pull claw, 500...Ball bearing shaft as shaft member, 510...First engagement part, 520...Second engagement part, 530...Retaining ring as third bearing member, 530a...Opening hole, 610...First coating, 1000, 1000A, 1000B, 1000C, 1000D, 1000E, 1000F, 1000G...Rotating weight support mechanism.

Claims

1. The barrel wheel that houses the mainspring, A rotating weight that generates mechanical energy to wind the mainspring by rotating, A shaft member comprising the rotating shaft of the aforementioned rotor, with a first engaging portion provided on its outer circumference, A first bearing member having an insertion hole into which the shaft member is inserted, and a second engaging portion that fastens with the first engaging portion is provided on the inner circumference of the insertion hole, A second bearing member is rotatably supported with respect to the first bearing member and fixed to the rotor weight, A plurality of rolling elements are arranged between the first bearing member and the second bearing member to assist the rotation of the second bearing member relative to the first bearing member, Equipped with, A movement in which a first coating, whose main component is titanium, is formed on at least one of the surfaces of the first engaging portion and the second engaging portion.

2. The movement according to claim 1, A movement in which the first coating is formed only on the surface of the second engagement portion of the first bearing member.

3. The movement according to claim 1, The first coating is formed on the entire surface of the first bearing member, including the surface of the second engaging portion, in a movement.

4. The movement according to claim 1, The first bearing member has a contact surface that contacts the plurality of rolling elements, The first coating is formed on the surface of the first bearing member, which includes at least the surface of the second engagement portion, excluding the contact surface, in a movement.

5. The movement according to claim 1, The present invention further comprises a third bearing member having an opening hole that fits into the first bearing member, the first bearing member being fitted into the opening hole and fixed to the first bearing member, The first bearing member has a fitting surface that engages with the third bearing member, A movement wherein the first coating is formed on the surface of the first bearing member, including at least the surface of the second engaging portion, excluding the mating surface.

6. The movement according to claim 1, A movement in which the first coating is formed only on the surface of the first engagement portion of the shaft member.

7. The movement according to claim 1, The first coating is formed on the entire surface of the shaft member, including the surface of the first engagement portion, in a movement.

8. The movement according to claim 1, The first coating is formed on the surface of the first engagement portion and the surface of the second engagement portion of the movement.

9. The movement according to claim 1, A movement in which the first coating is formed only on the surface of the first engaging portion and the surface of the second engaging portion.

10. A movement according to any one of claims 1 to 9, A case for housing the aforementioned movement, A watch equipped with [a specific feature].

Images