Watch parts and watches

Abstract

To precisely position watch components made of silicon in their designated locations. [Solution] The escape gear portion 101 is made of silicon and comprises a plurality of retaining portions 120 arranged in the circumferential direction of an insertion hole 180 through which a shaft member 201 is inserted, and which press the shaft member 201 toward the center of the insertion hole 180. The plurality of retaining portions 120 include a retaining portion 121 having a first portion 151 and a retaining portion 122 having a first portion 152 having a different shape from the first portion 151.

Description

Technical Field

[0001] The present invention relates to parts for a timepiece and a timepiece.

Background Art

[0002] Patent Document 1 discloses a mechanical timepiece equipped with a gang wheel part made of silicon as a mechanical part with silicon as a base material. The gang wheel part of Patent Document 1 has seven holding parts as holding parts for holding a shaft member. Each of the seven holding parts has a first holding part and a second holding part. The first holding part extends in a direction from a rim part toward the shaft member, and the second holding part has a first part extending in a direction intersecting the first holding part and a second part extending in a direction from the first part toward the shaft member.

[0003] The first part is easily bent in the direction toward the shaft member, and when the first part is bent, the second part can be displaced in the direction toward the shaft member and in the direction outward from the shaft member. Due to the stress generated by this displacement, the shaft member can be arranged and held at the center of the rotating member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Single crystal silicon has a crystal orientation and is anisotropic depending on the orientation, so the Young's modulus varies depending on the orientation. Therefore, when the gang wheel part is made of single crystal silicon and each of the first parts of the seven holding parts is manufactured with the same dimensions and / or shape, the ease of bending of the first parts is different for each of the seven holding parts, and there is a possibility that it may be difficult to arrange and hold the shaft member at the center of the rotating member.

Means for Solving the Problems

[0006] A watch component according to one aspect of the present application is a watch component made of silicon, comprising a plurality of retaining parts arranged in the circumferential direction of an insertion hole through which a shaft is inserted, and pressing the shaft toward the center of the insertion hole, wherein the plurality of retaining parts comprises a first retaining part having a first elastic part and a second retaining part having a second elastic part having a different shape from the first elastic part.

[0007] A watch component according to one aspect of the present application is a watch component made of silicon and having a through hole through which a shaft is inserted, the watch component comprising a rim portion having a plurality of teeth, and a plurality of retaining portions provided between the rim portion and the through hole and pressing the shaft toward the center of the through hole, the plurality of retaining portions comprising a first retaining portion and a second retaining portion adjacent to the first retaining portion, the first retaining portion having a contact portion that abuts against the shaft and an elastic portion that presses the contact portion toward the center of the through hole, the second retaining portion having a contact portion that abuts against the shaft and an elastic portion that presses the contact portion toward the center of the through hole, and the elastic portion of the first retaining portion and the elastic portion of the second retaining portion having different shapes.

[0008] A clock according to one aspect of the present invention comprises the above-mentioned clock components. [Brief explanation of the drawing]

[0009] [Figure 1] Front view of the clock according to Embodiment 1. [Figure 2] A structural diagram showing the general structure of the movement. [Figure 3] Plan view of the escapement mechanism. [Figure 4] A perspective view of the escape wheel from the front. [Figure 5] Cross-sectional view of the escape wheel along line AA in Figure 3. [Figure 6A] A schematic diagram illustrating the crystal structure of single-crystal silicon. [Figure 6B] A schematic diagram illustrating crystal orientation. [Figure 7A]Explanatory drawing showing equivalent crystal orientations in single-crystal silicon. [Figure 7B] Explanatory drawing showing equivalent crystal orientations in a silicon wafer. [Figure 8A] Explanatory drawing showing the crystal orientation of a silicon wafer. [Figure 8B] Graph showing the relationship between the crystal orientation and Young's modulus of a silicon wafer. [Figure 9] Explanatory drawing showing a cancer gear part formed from a silicon wafer. [Figure 10A] Explanatory drawing showing the relationship between the first part of the cancer gear part and the crystal orientation of the silicon wafer. [Figure 10B] Graph showing Young's modulus of the first part of the cancer gear part. [Figure 11A] Explanatory drawing showing the first part of the cancer gear part. [Figure 11B] Explanatory drawing showing the first part of the cancer gear part. [Figure 12A] Plan view showing a cancer gear part according to the first form. [Figure 12B] Cross-sectional view of the cancer gear part along the B-B line of FIG. 12A. [Figure 12C] Cross-sectional view of the cancer gear part along the C-C line of FIG. 12A. [Figure 12D] Cross-sectional view of a cancer gear part according to a modification of the cancer gear part according to the first form. [Figure 13] Plan view showing a cancer gear part according to the second form. [Figure 14] Plan view showing a cancer gear part according to the third form. <了 [Figure 15] Plan view showing a forward and reverse mechanism including a cancer gear part according to Embodiment 2. [Figure 16] Perspective view of a cancer gear seen from the front side, including a cancer gear part according to Embodiment 2. [Figure 17] Plan view showing a cancer gear part according to Embodiment 2. [Figure 18] Plan view showing a cancer gear part according to Embodiment 3. [Figure 19] Plan view showing a cancer gear part according to Embodiment 4. [Figure 20] A plan view showing the escape gear section according to Embodiment 5. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. Note that the drawings may be shown on a different scale than the actual dimensions. In this embodiment, a mechanical watch is used as an example of a watch. Furthermore, as a preferred example of a watch component in this embodiment, the escape wheel, which is one of the gears constituting the movement of a mechanical watch, is used. However, the application examples of the watch component in this embodiment are not limited to the escape wheel. For example, it may be applied to the anchor.

[0011] 1. Embodiment 1 1.1. Clocks Figure 1 is a front view showing a clock 1 according to Embodiment 1. Watch 1 is a wristwatch worn on the user's wrist and comprises an outer case 2, a dial 3 located inside the outer case 2, an hour hand 4A, a minute hand 4B, a second hand 4C, a date wheel 6, and a crown 7 located on the side of the outer case 2.

[0012] 1.2. Movement Figure 2 is a structural diagram showing the schematic structure of movement 10, and is a view of movement 10 from the back cover side. The movement 10 is housed in the outer case 2 (see Figure 1) of the watch 1.

[0013] The movement 10 has a base plate 11 that constitutes the circuit board. On the reverse side of the base plate 11, in other words, on the back side of the paper, is the dial 3, which is not shown. The gear train incorporated on the front side of the movement 10, in other words, on the front side of the paper, is called the front gear train, and the gear train incorporated on the back side of the movement 10 is called the back gear train.

[0014] A winding stem guide hole 11a is formed in the base plate 11, and the winding stem 12 is rotatably mounted in the winding stem guide hole 11a. The winding stem 12 is connected to the crown 7 (see Figure 1) and rotates together with the crown 7 when it is wound. The axial position of the winding stem 12 is determined by a switching device having a detent 13, a bolt 14, a bolt spring 15, and a back retainer 16. A wheel 17 is also rotatably mounted on the guide shaft portion of the winding stem 12.

[0015] In this configuration, when the winding stem 12 is rotated while it is in the first winding stem position (0th stage) closest to the inside of the movement 10 along the axis of rotation, the barrel wheel 17 rotates via the rotation of a barrel wheel (not shown). As the barrel wheel 17 rotates, the ratchet wheel 20 which meshes with the barrel wheel 17 rotates. As the ratchet wheel 20 rotates, the ratchet wheel 21 which meshes with the ratchet wheel 20 rotates. Furthermore, as the ratchet wheel 21 rotates, the mainspring (power source) (not shown) housed in the barrel wheel 22 is wound up.

[0016] The front gear train of movement 10 consists of the mainspring barrel 22 mentioned above, as well as the so-called number wheels, namely the second wheel 25, the third wheel 26, and the fourth wheel 27, which have the function of transmitting the rotational force of the mainspring barrel 22. The second wheel 25 is a gear that meshes with the mainspring barrel 22. The third wheel 26 is a gear that meshes with the second wheel 25. The fourth wheel 27 is a gear that meshes with the third wheel 26.

[0017] On the front side of the movement 10 are the escapement mechanism 30 and the speed control mechanism 31 for controlling the rotation of the front gear train. The escapement mechanism 30 is a mechanism that controls the rotation of the front gear train and includes an escape wheel 35 that meshes with the fourth wheel 27, and an anchor 36 that escapes the escape wheel 35 and rotates it regularly. The speed control mechanism 31 is a mechanism for controlling the speed of the escapement mechanism 30 and is equipped with a balance wheel 40.

[0018] 1.3.Escapement mechanism Next, the escape wheel 35 and the anchor 36, which constitute the escapement mechanism 30, will be explained based on Figures 3 to 5.

[0019] Figure 3 is a plan view of the escapement mechanism 30. Figure 4 is a perspective view of the escape wheel 35 from the front. Figure 5 is a cross-sectional view of the escape wheel 35 along line AA in Figure 3. As shown in Figures 3 to 5, the escapement mechanism 30 consists of an escape wheel 35 and an anchor 36.

[0020] 1.4. Elevator The escape wheel 35 comprises a shaft member 201 and an escape gear portion 101 fixed to the shaft member 201. In this embodiment, the shaft member 201 is an example of a shaft.

[0021] In the following explanation, the longitudinal direction along the axis c1 of the shaft member 201 is simply referred to as the axial direction. The axis c1 passes through the rotation center of the shaft member 201 along the axial direction. The surface 101a and the back surface 101b of the escape gear portion 101 are perpendicular to the axis c1. The direction that intersects the axis c1 in a plane parallel to the surface 101a or the back surface 101b of the escape gear portion 101 is referred to as the radial direction. The direction in which the escape gear portion 101 or the shaft member 201 revolves around the axis c1 is referred to as the circumferential direction.

[0022] The escape gear portion 101 is made of silicon and is a plate-shaped member with flat surfaces on its front surface 101a and back surface 101b. In this embodiment, the escape gear portion 101 formed from silicon is an example of a watch component.

[0023] The escape gear section 101 has a rim section 111 having a plurality of teeth 112, and a plurality of holding sections 120 that hold the shaft member 201.

[0024] The rim portion 111 is the annular portion of the outer edge of the escape gear portion 101. The teeth 112 protrude outward from the outer circumference of the rim 111 and are formed in a special hook shape. The tips of the multiple teeth 112 are in contact with the pallet stones 374 of the ankle 36.

[0025] The retaining portion 120 is positioned between the rim portion 111 and the shaft member 201. In Embodiment 1, the escape gear portion 101 has seven retaining portions 120. The retaining portions 120 are arranged at seven locations in the circumferential direction of the annular rim portion 111 at equal pitches of 360 / 7°. The number of retaining portions 120 may be in the range of three to seven or more, and is not particularly limited. Each of the seven retaining portions 120 has a first retaining portion 130 extending from the rim portion 111 in the direction of the shaft member 201, and a second retaining portion 140 branching off from the first retaining portion 130.

[0026] A shaft member 201 is inserted through a through hole 180 provided in the center of the escape gear section 101. The through hole 180 is a region enclosed by the first holding portion 130 and the second holding portion 140, and includes the center of the escape gear section 101. The through hole 180 is provided so that its center coincides with the center of the escape gear section 101. In other words, the through hole 180 is provided so that the axis c1 of the shaft member 201 inserted into the through hole 180 coincides with the center of the escape gear section 101. Therefore, the shaft member 201 is held in the through hole 180 so that its axis c1 coincides with the center of the escape gear section 101.

[0027] The first retaining portion 130 extends in the direction toward the shaft member 201 from the rim portion 111. The first retaining portion 130 has the function of preventing the rotation of the escape gear portion 101 relative to the shaft member 201 by fitting into the groove 225. The tip of the first retaining portion 130 is located closer to the center of the shaft member 201 than the tip of the first portion 150 of the second retaining portion 140.

[0028] The second holding portion 140 has a first portion 150 and a second portion 160. The second holding portion 140 holds the shaft member 201 at the center of the escape gear portion 101 and has the function of preventing the escape gear portion 101 from tilting or coming loose from the shaft member 201.

[0029] The first portion 150 is connected to the first retaining portion 130 and extends in a direction intersecting the extending direction of the first retaining portion 130. The second retaining portion 140 has a plurality of first portions 150. Multiple first parts 150 are arranged substantially parallel to each other. The multiple first parts 150 press the shaft member 201 toward the center of the insertion hole 180 via the second parts 160, thereby preventing the axis c1 of the shaft member 201 from deviating from the center of the escape gear section 101, or in other words, preventing misalignment between the center of the escape gear section 101 and the axis c1 of the shaft member 201. In this embodiment, the first portion 150 is an example of an elastic portion.

[0030] The second portion 160 is connected to a plurality of first portions 150 and extends toward the shaft member 201. The tip of the second portion 160 fits into a recess 226 of the shaft member 201, as shown in Figure 5. The tip of the second portion 160 abuts against the shaft member 201 and is pushed toward the center of the insertion hole 180 by the first portions 150, thereby pressing the shaft member 201 toward the center of the insertion hole 180. In this embodiment, the second portion 160 is an example of a contact portion.

[0031] As shown in Figure 3, when the escape gear portion 101 is viewed from the shaft member 201 side, the first holding portion 130 and the second portion 160 each extend radially outward. In a plane parallel to the surface 101a of the escape gear portion 101, the extending direction of the first holding portion 130 and the extending direction of the second portion 160 are both along the radial direction, but are not parallel to each other. The extension direction of the first portion 150 is in a plane parallel to the surface 101a of the escape gear portion 101, and intersects with the extension direction of the first holding portion 130 and the extension direction of the second portion 160.

[0032] The multiple first portions 150, which are beam-shaped and formed between the first holding portion 130 and the second portion 160, are each easily deflected in the direction of extension of the first holding portion 130 and the second portion 160. Furthermore, each of the multiple first portions 150 is not easily deflected in the axial direction.

[0033] Therefore, when inserting the shaft member 201 into the through hole 180 of the escape gear portion 101, the multiple first portions 150 flex and are displaced relative to the shaft member 201 in the direction of extension of the second portion 160, thereby easily fitting the second portion 160 into the recess 226.

[0034] Furthermore, the multiple first parts 150 are easily flexible in the direction of extension of the second part 160 and therefore function as elastic parts. Consequently, the multiple first parts 150 can hold the shaft member 201 so that its axis c1 does not deviate from the center of the escape gear part 101 by pressing the shaft member 201 toward the center of the insertion hole 180 via the second part 160.

[0035] Furthermore, the multiple first parts 150 are less likely to deform in the direction of extension of the axis c1, in other words, in the direction in which the shaft member 201 would detach from the escape gear section 101, thus preventing the escape gear section 101 from tilting or detaching relative to the shaft member 201.

[0036] The first holding portion 130, the second holding portion 140, and the rim portion 111 are integrally formed from the same material. In this embodiment, the escape gear portion 101 is formed from a silicon wafer 51 (see Figure 9) made of single-crystal silicon. The escape gear portion 101 can be formed from the silicon wafer 51 by forming a photoresist pattern on the surface of the silicon wafer 51 and performing anisotropic etching.

[0037] In this way, each part of the escape gear section 101, such as the first holding section 130, the second holding section 140, and the rim section 111, can be formed from the same silicon wafer 51, and a large number of escape gear sections 101 can be formed from a single silicon wafer 51. This improves the productivity of the escape gear section 101 and reduces production costs. Furthermore, since it is formed using photolithography and etching technology, it offers the advantage of greater freedom in shape and improved processing accuracy.

[0038] The shaft member 201 has tenon portions 221a, 221b, an escapement pinion portion 222, a tapered portion 223, and a protruding portion 224. The shaft member 201 is fixed to the escapement gear portion 101 with the tapered portion 223 protruding from the surface 101a of the escapement gear portion 101 toward the other end in the axial direction.

[0039] The tenons 221a and 221b are located at both ends of the shaft member 201 in the axial direction. Of the tenons 221a and 221b, the tenon 221a located at one end in the axial direction is rotatably supported by a gear train support (not shown), and the tenon 221b located at the other end in the axial direction is rotatably supported by the base plate 11. The portion of the shaft member 201 between the escapement pinion 222 and the projection 224 is called the shaft portion 229 (see Figure 5).

[0040] The escape wheel portion 222 is formed on the shaft member 201 near the tenon portion 221a in the axial direction. The escape wheel portion 222 has a plurality of teeth 222a and a groove 228. The plurality of teeth 222a are formed to protrude radially outward from the shaft portion 229. The grooves 225 and 228 are located at the same position in the circumferential direction of the shaft member 201. When the escape wheel portion 222 meshes with the gear portion of the fourth wheel 27 (see Figure 2), the rotational force of the fourth wheel 27 is transmitted to the shaft member 201, causing the escape wheel 35 to rotate.

[0041] 1.5. Ankle In this embodiment, the anchor 36 is formed from silicon. The anchor 36, like the escape wheel 35, can be formed from a silicon wafer 51 made of single-crystal silicon. In this embodiment, the anchor 36 formed from silicon is an example of a watch component.

[0042] Ankle 36 has three ankle beams 310 consisting of ankle arms 311, 312 and ankle shaft 313. The tips of the ankle arms 311 and 312 each have a palp stone portion 374 integrally formed. In addition, the tip of the ankle shaft 313 has a sword-shaped tip 375 integrally formed.

[0043] The ankle 36 has a through hole 380 that penetrates it. This through hole 380 is formed inside two wall surfaces 381 that intersect at a predetermined angle and two holding parts 320, which will be described later, and is shaped so that the shaft 401 can be inserted through it.

[0044] The anchor 36 is configured to be rotatable by a shaft 401. The shaft 401 is rotatably supported at both ends by the base plate 11 (see Figure 2) and an anchor support (not shown). In this embodiment, the shaft 401 is an example of a shaft.

[0045] When the anchor 36, configured in this way, rotates around the shaft 401, the pallet stone portion 374 comes into contact with the tip of the teeth portion 112 of the escape wheel 35. At the same time, the anchor beam 310, which is provided with the tip 375, comes into contact with a dovetail pin (not shown), thereby preventing the anchor 36 from rotating any further in the same direction. As a result, the rotation of the escape wheel 35 is also temporarily stopped.

[0046] Multiple retaining portions 320 are formed within the insertion hole 380, protruding into the insertion hole 380. Each of the retaining portions 320 includes retaining portion 320a and retaining portion 320b, and each is formed in a roughly L-shape with its tip bent.

[0047] The retaining parts 320a and 320b are configured to be elastically deformable in a direction perpendicular to the axial direction of the shaft 401, in other words, in the radial direction of the shaft 401. The shaft 401 is held between the retaining parts 320a and 320b and the two wall surfaces 381. The elastic deformation of the retaining parts 320a and 320b presses the shaft 401 toward the center of the insertion hole 380, thereby holding the shaft 401 at the pivot point of the ankle 36. In other words, the ankle 36 is held in a predetermined position relative to the shaft 401 by the elastic force of the retaining parts 320a and 320b. In this embodiment, the retaining part 320a is an example of a first retaining part, and the retaining part 320b is an example of a second retaining part.

[0048] The retaining portion 320a has a first portion 321a and a second portion 322a. The retaining portion 320b has a first portion 321b and a second portion 322b. The first parts 321a and 321b are portions that extend from the wall surface of the insertion hole 380 at their base ends. The second portion 322a is the portion that extends in the direction of the axis 401 from the other end of the first portion 321a, straddling the bent portion. The second portion 322b is the portion that extends in the direction of the axis 401 from the other end of the first portion 321b, straddling the bent portion. The ends of the second parts 322a and 322b are in contact with the shaft core 401.

[0049] The first portion 321a is easily flexible in the direction of extension of the second portion 322a, and presses the shaft core 401 toward the center of the insertion hole 380 via the second portion 322a. In other words, the first portion 321a functions as an elastic portion, similar to the first portion 150 of the escape gear portion 101. In this embodiment, the first portion 321a is an example of a first elastic portion.

[0050] Similarly, the first portion 321b is flexible in the direction of extension of the second portion 322b, and through the second portion 322b, presses the shaft core 401 toward the center of the insertion hole 380. In other words, the first portion 321b functions as an elastic portion, similar to the first portion 150 of the escape gear portion 101. In this embodiment, the first portion 321b is an example of a second elastic portion.

[0051] When an external force is applied to the anchor 36, the first parts 321a and 321b deform in the direction of extension of the second parts 322a and 322b, respectively, thereby holding the shaft 401 at the pivot center of the anchor 36. In this embodiment, the first parts 321a and 321b have different shapes. The reason and method for making the shapes of the first parts 321a and 321b different is the same as for the first part 150 of the escape gear section 101, which will be described later.

[0052] Furthermore, the first parts 321a and 321b are less likely to bend in the axial direction of the shaft core 401. Therefore, tilting or detachment of the anchor 36 relative to the shaft core 401 can be suppressed.

[0053] 1.6. Crystal orientation and Young's modulus of single-crystal silicon Next, the crystal orientation and Young's modulus E of single-crystal silicon 50 will be explained with reference to Figures 6A to 8B.

[0054] Figure 6A is a schematic diagram illustrating the crystal structure of single-crystal silicon 50, showing a simplified model of the crystal structure. The simplified model of the crystal structure shown in Figure 6A differs from the actual crystal structure, but in this embodiment, the explanation will be based on the simplified model of the crystal structure shown in Figure 6A for the sake of easier understanding. Figure 6B is a schematic diagram illustrating the crystal orientation. Figure 7A is a diagram illustrating equivalent crystal orientations in single-crystal silicon 50. Figure 7B is a diagram illustrating equivalent crystal orientations in silicon wafer 51. Figure 8A is a diagram illustrating the crystal orientation of silicon wafer 51. Figure 8B is a graph showing the relationship between the crystal orientation of silicon wafer 51 and Young's modulus E.

[0055] The silicon wafer 51 used to form the escape gear section 101 and the anchor 36 is made of single-crystal silicon 50. As shown in Figures 6A and 6B, single-crystal silicon 50 has multiple crystal orientations. Of the multiple crystal orientations, <100> direction, <010> Direction, and, <001> Directions are equivalent directions. <110> direction, <101> Direction, and, <011> Directions are equivalent directions.

[0056] Therefore, for example, as shown in Figure 7A, from single crystal silicon 50, <100> Long member 501 in the direction, <010> Long member 502 in the direction, <001> A long member 503 in the direction, and <001> When forming a long member 504 in a specific direction, members 501, 502, 503, and 504 each have the same characteristics.

[0057] As shown in Figure 7B, the silicon wafer 51 is a single-crystal silicon wafer with a (100) crystal plane orientation. In the silicon wafer 51, members 501 and 502 differ by 90° in their extending direction orientation, i.e., their longitudinal direction. However, the crystal orientation in which member 501 extends and the crystal orientation in which member 502 extends are equivalent orientations, so members 501 and 502 have the same properties. Note that the crystal plane orientation of the silicon wafer 51 is not limited to the (100) plane. For example, a wafer with a (110) plane may be used.

[0058] Figure 8A shows the crystal orientation of the silicon wafer 51. The crystal orientation of the silicon wafer 51 can be determined by the orientation flat 52 provided on the silicon wafer 51.

[0059] In Figure 8A, the component 501 has its longitudinal direction on the (110) plane of the silicon wafer 51, <010> It is positioned to have a specific orientation. The longitudinal direction of member 501 can be set to a desired orientation on the (110) plane of the silicon wafer 51. For example, the longitudinal direction of member 501 can be rotated from 0° to 360° within the (100) plane of the silicon wafer 51, with member 501 as shown in Figure 8A being 0°.

[0060] Figure 8B is a graph showing the Young's modulus E of member 501 at various in-plane rotation angles, when member 501, shown in Figure 8A, is rotated 360° from an in-plane rotation angle of 0° on the (100) plane of the silicon wafer 51, with the longitudinal direction of member 501 being the in-plane rotation angle of 0°.

[0061] As shown in Figure 8B, the Young's modulus E of member 501 changes periodically between 130 Gpa and 169 Gpa depending on the in-plane rotation angle.

[0062] The Young's modulus E is minimized when the in-plane rotation angle is 0°, that is, when the longitudinal direction of member 501 is <010> This is the case for directions. Also, <010> Even at in-plane rotation angles of 90°, 180°, and 270°, which are equivalent to the direction, Young's modulus E is the same magnitude as at an in-plane rotation angle of 0°.

[0063] The Young's modulus E is maximized when the in-plane rotation angle is 45°, that is, the longitudinal direction of member 501 is <110> This is the case for directions. Also, <110> Even at in-plane rotation angles of 135°, 225°, and 315°, which are equivalent to the direction, Young's modulus E is the same as at an in-plane rotation angle of 45°.

[0064] Between an in-plane rotation angle of 0° and an in-plane rotation angle of 45°, Young's modulus E increases as the in-plane rotation angle increases. Similarly, between an in-plane rotation angle of 90° and 135°, between an in-plane rotation angle of 180° and 225°, and between an in-plane rotation angle of 270° and 315°, Young's modulus E increases as the in-plane rotation angle increases.

[0065] Between an in-plane rotation angle of 45° and 90°, Young's modulus E decreases as the in-plane rotation angle increases. Similarly, between an in-plane rotation angle of 135° and 180°, between 225° and 270°, and between 315° and 360°, Young's modulus E decreases as the in-plane rotation angle increases.

[0066] 1.7. First part of the escape gear section and Young's modulus Next, the first part 150 of the escape gear section 101 and Young's modulus E will be explained with reference to Figures 9 to 11B. As described above, the first part 150 functions as an elastic part.

[0067] Figure 9 is an explanatory diagram showing the escape gear portion 101 formed from the silicon wafer 51. Figure 10A is an explanatory diagram showing the relationship between the first portion 150 of the escape gear portion 101 and the crystal orientation of the silicon wafer 51. Figure 10B is a graph showing the Young's modulus E of the first portion 150 of the escape gear portion 101. Figure 11A is an explanatory diagram showing the first portion 150 of the escape gear portion 101. Figure 11B is an explanatory diagram showing the first portion 150 of the escape gear portion 101.

[0068] As shown in Figure 9, in this embodiment, the escape gear portion 101 is formed from a silicon wafer 51. Furthermore, the silicon wafer 51 can be formed into a desired shape by using photolithography or etching technology.

[0069] As described above, in this embodiment, the escape gear section 101 has seven holding sections 121, 122, 123, 124, 125, 126, and 127 as a holding section 120. Each of the seven holding sections 121, 122, 123, 124, 125, 126, and 127 has first sections 151, 152, 153, 154, 155, 156, and 157 as a first section 150.

[0070] As shown in Figure 10A, in the escape gear section 101, if the direction in which the first portion 151 of the retaining portion 121 is provided is set to 0°, then the first portion 152 of the retaining portion 122 is provided at 51°, the first portion 153 of the retaining portion 123 is provided at 102°, the first portion 154 of the retaining portion 124 is provided at 154°, the first portion 155 of the retaining portion 125 is provided at 205°, the first portion 156 of the retaining portion 126 is provided at 257°, ​​and the first portion 157 of the retaining portion 127 is provided at 308°. Here, if the direction in which the first portion 151 is provided is set to 0°, then the direction in which the first portion 151 extends is: <010> Direction or <100> It is equivalent to a direction.

[0071] Figure 10B shows the Young's modulus E for each of the first parts 151, 152, 153, 154, 155, 156, and 157. E1 shows the Young's modulus of the first part 151, E2 shows the Young's modulus of the first part 152, E3 shows the Young's modulus of the first part 153, E4 shows the Young's modulus of the first part 154, E5 shows the Young's modulus of the first part 155, E6 shows the Young's modulus of the first part 156, and E7 shows the Young's modulus of the first part 157.

[0072] Thus, the first parts 151, 152, 153, 154, 155, 156, and 157 each have different Young's moduli E. Therefore, the magnitude of the force pressing the shaft member 201 toward the center of the insertion hole 180 differs in the first parts 151, 152, 153, 154, 155, 156, and 157.

[0073] In this embodiment, if we define the magnitude of the force exerted by the first part 150 to press the shaft member 201 toward the center of the insertion hole 180 as the spring strength k of the first part 150, then the spring strength k of the first part 150 shown in Figure 11A can be calculated using Equation 1.

number

[0074] As shown in Figure 11B, when the first part 150 is composed of three first parts 150a, 150b, and 150c, the spring strength k of the first part 150 can be calculated using Equation 2.

number

[0075] L1 is the length of the first section 150a in the extending direction. b1 is the thickness of the first section 150a. h1 is the width of the first section 150a. L2 is the length of the first section 150b in the direction of extension. b2 is the thickness of the first section 150b. h2 is the width of the first section 150b. L3 is the length of the first section 150c in the direction of extension. b3 is the thickness of the first section 150c. h3 is the width of the first section 150c.

[0076] As is clear from equation 2, when the first part 150 is composed of three first parts 150a, 150b, and 150c, the spring strength k of the first part 150 is the sum of the spring strength k1 of the first part 150a, the spring strength k2 of the first part 150b, and the spring strength k3 of the first part 150c.

[0077] In Embodiment 1, the seven first parts 151, 152, 153, 154, 155, 156, and 157 are formed such that the spring strength k of each of the seven first parts is the same value.

[0078] By aligning the spring strengths k of each of the first parts 151, 152, 153, 154, 155, 156, and 157, it is possible to suppress with greater precision the deviation of the axis c1 of the shaft member 201 from the center of the escape gear section 101, or in other words, the misalignment between the center of the escape gear section 101 and the axis c1 of the shaft member 201. Therefore, the escape gear section 101 made of silicon can be accurately positioned in a predetermined location and that position can be maintained.

[0079] 1.8. Shape of the first part of the escape gear section As described above, the Young's modulus E differs in the first parts 151, 152, 153, 154, 155, 156, and 157. Therefore, in order to equalize the spring strength k of the first parts 151, 152, 153, 154, 155, 156, and 157, Embodiment 1 adjusts the spring strength k by making the shapes of the first parts 151, 152, 153, 154, 155, 156, and 157 different. The following describes specific forms for making the shapes of the first parts 151, 152, 153, 154, 155, 156, and 157 different.

[0080] Here, changing the shape of the first parts 151, 152, 153, 154, 155, 156, and 157 means that one or more of the length L, thickness b, width h, and number of each of the first parts 151, 152, 153, 154, 155, 156, and 157 are different.

[0081] As described above, since the escape gear portion 101 is formed using photolithography and etching techniques, there is a high degree of freedom in the shape of the first portions 151, 152, 153, 154, 155, 156, and 157, and the shapes of the first portions 151, 152, 153, 154, 155, 156, and 157 can be formed with high processing accuracy.

[0082] 1.8.1. First form of the first part of the escape gear section Figure 12A is a plan view showing the escape gear section 1011 according to the first embodiment. Figure 12B is a cross-sectional view of the escape gear section 1011 along line B in Figure 12A. Figure 12C is a cross-sectional view of the escape gear section 1011 along line C in Figure 12A.

[0083] The escape gear section 1011 according to the first embodiment has seven first sections 151, 152, 153, 154, 155, 156, and 157 as the first section 150, and in order to make the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157 the same, the width h (see Figure 11A) of each is made different.

[0084] Part 151 consists of three parts 151a, 151b, and 151c, and the widths h11, h21, and h31 of the three parts 151a, 151b, and 151c are all the same. Part 152 consists of three parts 152a, 152b, and 152c, where the widths h12, h22, and h32 of the three parts 152a, 152b, and 152c are all the same width, and the widths h12, h22, and h32 are narrower than the widths h11, h21, and h31.

[0085] In Embodiment 1, the first part 151 is an example of a first elastic part, and the first part 152 is an example of a second elastic part.

[0086] Part 153 consists of three parts 153a, 153b, and 153c, each of which has the same width. Part 154 consists of three parts 154a, 154b, and 154c, each of which has the same width. Part 155 consists of three parts 155a, 155b, and 155c, each of which has the same width. Part 156 consists of three parts 156a, 1563b, and 156c, each of which has the same width. Part 157 consists of three parts 157a, 157b, and 157c, each of which has the same width.

[0087] In the escape gear section 1011 according to the first embodiment, the first parts 151a, 152a, 153a, 154a, 155a, 156a, and 157a each have the same length L1 and the same thickness b1. The first parts 151b, 152b, 153b, 154b, 155b, 156b, and 157b each have the same length L2 and the same thickness b2. The first parts 151c, 152c, 153c, 154c, 155c, 156c, and 157c each have the same length L3 and the same thickness b3.

[0088] In the escape gear section 1011 according to the first embodiment, the widths h11, h21, and h31 of the three first sections 151a, 151b, and 151c constituting the first section 151 are the same, but some or all of the widths h11, h21, and h31 may be different. Similarly, in the first sections 152, 153, 154, 155, 156, and 157, some or all of the three sections may be different widths.

[0089] In the escape gear section 1011 according to the first embodiment, in order to equalize the spring strength k of each of the first parts 151, 152, 153, 154, 155, 156, and 157, only the width h of each part was made different. However, the length L and / or thickness b may also be made different along with the width h.

[0090] In the escape gear section 1011 according to the first embodiment, the holding section 121 is an example of a first holding section, and the first part 151 of the holding section 121 is an example of a first elastic section. In the escape gear section 1011 according to the first embodiment, the holding section 122 is an example of a second holding section, and the first portion 152 of the holding section 122 is an example of a second elastic section.

[0091] 1.8.1.1. Modified form of the first form of the escape gear section Figure 12D is a cross-sectional view of a modified escape gear 1011a of the escape gear 1011 according to the first embodiment. Figure 12D shows a cross-section at the position corresponding to line BB in Figure 12A.

[0092] In the modified escape gear section 1011a, the thickness b of each of the first parts 151, 152, 153, 154, 155, 156, and 157 is varied in order to equalize their respective spring strengths k. For example, half-etching techniques can be used to adjust the thickness b. Furthermore, by changing the width h along with the thickness b, the range of adjustment can be broadened while suppressing an increase in the number of processing steps.

[0093] In the escape gear section 1011 according to the first embodiment, the thicknesses b11, b21, and b31 of the three first sections 151a, 151b, and 151c constituting the first section 151 are all the same, but some or all of the thicknesses b11, b21, and b31 may be different. Similarly, in the first sections 152, 153, 154, 155, 156, and 157, some or all of the three sections may be different thicknesses.

[0094] 1.8.2. Second form of escape gear section Figure 13 is a plan view showing the escape gear section 1012 according to the second embodiment. The escape gear section 1012 according to the second embodiment has seven first sections 151, 152, 153, 154, 155, 156, and 157 as the first section 150, and in order to make the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157 the same, the lengths L (see Figure 11A) of each are made different.

[0095] In the escape gear section 1012 according to the second embodiment, the difference in length L between the first section 151 and the first section 152 means that the sum of the lengths L1 (see Figure 11B) of the first section 151a, L2 of the first section 151b, and L3 of the first section 151c that constitute the first section 151 is different from the sum of the lengths L1 of the first section 152a, L2 of the first section 152b, and L3 of the first section 152c that constitute the first section 152.

[0096] In the escape gear section 1012 according to the second embodiment, in order to equalize the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157, only the length L of each section was made different. However, the thickness b and / or width h may also be made different along with the length L.

[0097] 1.8.3. Third form of escape gear section Figure 14 is a plan view showing the escape gear section 1013 according to the third embodiment. The escape gear section 1013 according to the third embodiment has seven first sections 151, 152, 153, 154, 155, 156, and 157 as the first section 150, and the number of each section is different in order to equalize the spring strength k of each first section 151, 152, 153, 154, 155, 156, and 157.

[0098] The first part 151 comprises five first parts 151a, 151b, 151c, 151d, and 151e. The first part 152 comprises two first parts 152a and 152b. The first part 153 comprises four first parts 153a, 153b, 153c, and 153d. The first part 154 comprises three first parts 154a, 154b, and 154c. The first part 155 comprises three first parts 155a, 155b, and 155c. The first part 156 comprises four first parts 156a, 156b, 156c, and 156d. The first part 157 comprises two first parts 157a and 157b.

[0099] In the escape gear section 1013 according to the third embodiment, the number of each of the first parts 151, 152, 153, 154, 155, 156, and 157 is not limited to 2 to 5. There may be 1 or 6 or more.

[0100] In the escape gear section 1013 according to the third embodiment, in order to equalize the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157, only the number of each section is made different, but the length L, width h, and / or thickness b may also be made different along with the number of sections.

[0101] As described above, the watch component of this embodiment provides the following advantages. The escape gear portion 101 as a watch component of this embodiment is a watch component made of silicon and comprises a plurality of retaining portions 120 arranged in the circumferential direction of an insertion hole 180 through which a shaft member 201 as a shaft is inserted, and which press the shaft member 201 toward the center of the insertion hole 180. The plurality of retaining portions 120 include a retaining portion 121 as a first retaining portion having a first portion 151 as a first elastic portion, and a retaining portion 122 as a second retaining portion having a first portion 152 as a second elastic portion having a different shape from the first portion 151.

[0102] Thus, because the first part 151 and the first part 152 have different shapes, the spring strength k of the first part 151 and the first part 152 can be made equal. Therefore, the magnitude of the force with which the first part 151 and the first part 152 press the shaft member 201 toward the center of the insertion hole 180 can be made equal. Thus, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear section 101, in other words, the misalignment between the center of the escape gear section 101 and the axis c1 of the shaft member 201 can be suppressed with higher precision.

[0103] In the escape gear portion 1011 of the watch component of this embodiment, the first portion 151 as the first elastic portion and the first portion 152 as the second elastic portion have different widths h as the length along the radial direction of the insertion hole 180.

[0104] Thus, the first part 151 and the first part 152 have different widths h. Therefore, the spring strength k of the first part 151 and the first part 152 can be easily made equal. Thus, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear portion 101 can be suppressed with higher precision.

[0105] In the escape gear portion 1011a of the clock component of this embodiment, the first portion 151 as the first elastic portion and the first portion 152 as the second elastic portion have different thicknesses b, which are defined as the length along the axial direction of the shaft member 201 as the shaft.

[0106] Thus, the first part 151 and the first part 152 have different thicknesses b. Therefore, the spring strength k of the first part 151 and the first part 152 can be easily made equal. Thus, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear portion 101 can be suppressed with higher precision.

[0107] In the escape gear portion 1012 of the clock component of this embodiment, the first portion 151, which is the first elastic portion, and the first portion 152, which is the second elastic portion, have different lengths L in the extending direction.

[0108] Thus, the first part 151 and the first part 152 have different lengths L. Therefore, the spring strength k of the first part 151 and the first part 152 can be easily made equal. Thus, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear section 101 can be suppressed with higher precision.

[0109] In the escape gear section 1013 of the watch component of this embodiment, the first retaining section 121 comprises five first parts 151a, 151b, 151c, 151d, and 151e as n elastic parts, and the second retaining section 122 comprises two first parts 152a and 152b as m elastic parts different from n.

[0110] Thus, the first part 151 and the first part 152 have different numbers of springs. Therefore, the spring strength k of the first part 151 and the first part 152 can be easily made equal. As a result, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear section 101 can be suppressed with higher precision.

[0111] The watch component of this embodiment is a watch gear portion 101 made of silicon, having an insertion hole 180 through which a shaft member 201 as an axis is inserted, the watch gear portion 101 comprises a rim portion 111 having a plurality of teeth 112, and a plurality of retaining portions 120 provided between the rim portion 111 and the insertion hole 180, which press the shaft member 201 toward the center of the insertion hole 180, the plurality of retaining portions 120 comprising a retaining portion 121 as a first retaining portion, a second retaining portion adjacent to the retaining portion 121 and The first part 151 of the first part 121 and the first part 152 of the first part 122 have different shapes. The first part 151 of the first part 121 and the first part 152 of the first part 122 have different shapes.

[0112] Thus, because the first part 151 and the first part 152 have different shapes, the spring strength k of the first part 151 and the first part 152 can be made equal. Therefore, the magnitude of the force that the first part 151 and the first part 152 exert on the shaft member 201 toward the center of the insertion hole 180 can be made equal. Thus, the deviation of the axis c1 of the shaft member 201 from the center of the escape gear portion 101 can be suppressed with higher precision.

[0113] The clock 1 of this embodiment includes the escape gear section 101 as a clock component as described above. Thus, the clock 1 of this embodiment can suppress with higher precision the deviation of the axis c1 of the shaft member 201 from the center of the escape gear section 101, and therefore can provide a clock of superior quality.

[0114] 2. Embodiment 2 Figure 15 is a plan view showing an escapement mechanism 30 equipped with an escape gear section 1014 according to Embodiment 2. Figure 16 is a perspective view of an escape wheel 35 equipped with an escape gear section 1014 according to Embodiment 2, viewed from the front. Figure 17 is a plan view showing an escape gear section 1014 according to Embodiment 2.

[0115] In Embodiment 2, the configuration for holding the shaft member 201 differs from that of the escape gear section 101 in Embodiment 1. Components identical or similar to those in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted.

[0116] As shown in Figure 15 or Figure 16, the escape gear portion 1014 has a plurality of holding portions 60 for holding the shaft member 201. The escape gear portion 1014 is formed from silicon, similar to Embodiment 1.

[0117] The retaining portion 60 is positioned on the shaft member 201 side relative to the rim portion 111. In Embodiment 2, the plurality of holding parts 60 are composed of a plurality of first parts 640 and second parts 631, 632, 633.

[0118] The second portions 631, 632, and 633 are formed to curve and protrude into the insertion hole 680 through which the shaft member 201 is inserted, and the shaft member 201 is held at the top portions 631a, 632a, and 633a of the second portions 631, 632, and 633a, respectively.

[0119] Multiple first portions 640 are provided between the rim portion 111 and the second portions 631, 632, and 633, and by pressing the shaft member 201 toward the center of the insertion hole 680 via the second portions 631, 632, and 633, the axis c1 of the shaft member 201 is prevented from deviating from the center of the escape gear portion 1014, in other words, the axis c1 of the shaft member 201 is prevented from shifting. In Embodiment 2, the first portion 640 is an example of an elastic portion.

[0120] As shown in Figure 17, the first part 640 includes the first parts 641, 642, 643, 644, 645, and 646. The holding portion 61 has first portions 641, 646 and a second portion 631, the holding portion 62 has first portions 642, 643 and a second portion 632, and the holding portion 63 has first portions 644, 645 and a second portion 633.

[0121] In Embodiment 2, the shape of the first parts 641, 642, 643, 644, 645, and 646 is changed in order to match the spring strength k of the first parts 641, 642, 643, 644, 645, and 646 of the holding part 61, the spring strength k of the first parts 642, 643, 644, 645, and 646 of the holding part 62, and the spring strength k of the first parts 644, 642, 643, 644, 645, and 646. The shape of the first parts 641, 642, 643, 644, 645, and 646 can be made different by changing one or more of their respective lengths, thicknesses, widths, and number.

[0122] 3. Embodiment 3 Figure 18 is a plan view showing the escape gear section 1015 according to Embodiment 3. In Embodiment 3, components identical or similar to those in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted.

[0123] The escape gear section 1015 differs from the escape gear section 101 of Embodiment 1 in the arrangement of the holding portion 120. Specifically, in the escape gear section 1015, the arrangement of the first holding portion 130 and the second holding portion 140 is mirror-symmetric to that of the escape gear section 101 of Embodiment 1.

[0124] In the escape gear section 1015 according to Embodiment 3, similar to Embodiment 1, in order to equalize the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157, the length L, width h, thickness b, and one or more of the number of sections can be varied according to the respective Young's moduli E1, E2, E3, E4, E5, E6, and E7.

[0125] 4. Embodiment 4 Figure 19 is a plan view showing the escape gear section 1016 according to Embodiment 4. In Embodiment 4, components identical or similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted.

[0126] The escape gear section 1016 differs from the escape gear section 101 of Embodiment 1 in the arrangement of the retaining portion 120. Specifically, in the escape gear section 1016, the arrangement of the retaining portion 121 and the teeth portion 112 is misaligned. In other words, the seven retaining portions 121, 122, 123, 124, 125, 126, 127 and the fifteen teeth portion 112 are out of phase.

[0127] In the escape gear section 1016 according to Embodiment 4, similar to Embodiment 1, in order to equalize the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157, the length L, width h, thickness b, and one or more of the number of sections can be varied according to the respective Young's moduli E1, E2, E3, E4, E5, E6, and E7.

[0128] 5. Embodiment 5 Figure 20 is a plan view showing the escape gear section 1017 according to Embodiment 5. In Embodiment 5, components identical or similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted.

[0129] The shape of the second holding portion 140 of the escape gear portion 1017 differs from that of the escape gear portion 101 of Embodiment 1, in that the second holding portion 140 consists of a first portion 150 and a second portion 160. Specifically, in the escape gear portion 1017, the multiple first portions 150 and second portions 160 are formed into a single smooth piece.

[0130] In the escape gear section 1017 according to Embodiment 5, similar to Embodiment 1, in order to equalize the spring strength k of each of the first sections 151, 152, 153, 154, 155, 156, and 157, the length L, width h, thickness b, and one or more of the number of sections can be varied according to the respective Young's moduli E1, E2, E3, E4, E5, E6, and E7.

[0131] Although preferred embodiments have been described above, the present invention is not limited to the embodiments described above. Furthermore, the configuration of each part of the present invention can be replaced with any configuration that performs a similar function to that of the embodiments described above, and any configuration can be added. [Explanation of Symbols]

[0132] 1…Watch, 2…Outer case, 3…Dial, 4A…Hour hand, 4B…Minute hand, 4C…Second hand, 6…Date wheel, 7…Crown, 10…Movement, 11…Main plate, 11a…Winding stem guide hole, 12…Winding stem, 13…Setting hook, 14…Bounce, 15…Bounce spring, 16…Back retainer, 17…Latch wheel, 20…Round wheel, 21…Round wheel, 22…Mainspring barrel, 25…Second wheel, 26…Third wheel, 27…Fourth wheel, 30…Escapement mechanism, 31…Regulating mechanism, 35…Escape wheel, 36…Anchor, 50…Single crystal silicon, 51…Silicon wafer, 52…Orientation flat, 60, 61, 62, 63…Holding part, 101, 101 1, 1011a, 1012, 1013, 1014, 1015, 1016, 1017…escape gear section, 101a…surface, 101b…back, 111…rim section, 112…tooth section, 120, 121, 122, 123, 124, 125, 126, 127…holding section, 130…first holding section, 140…second holding section, 150, 150a, 150b, 150c, 151, 151a, 151b, 151c, 151d, 151e, 152, 152a, 152b, 152c, 153, 153a, 153b, 153c, 153d, 154, 154a, 154b, 154c, 155, 155a ,155b,155c,156,156a,156b,156c,156d,157,157a,157b,157c...First part, 160...Second part, 180...Through hole, 201...Shaft member, 221a,221b...Tenon part, 222...Escape pin part, 222a...Teeth, 223...Tapered part, 224...Protruding part, 225...Groove, 226...Recess, 228...Groove, 229...Shaft part, 310...Ankle beam, 311,312...Ankle arm, 313...Ankle rod, 320,320a,320b...Holding part, 321a,321b...First part, 322a,322b...Second part, 374...Pawl stone Part, 375...point, 380...through hole, 381...wall, 401...axis, 501, 502, 503, 504...member, 631, 632, 633...second part, 631a, 632a, 632a...top, 640, 641, 642, 643, 644, 645, 646...first part, 680...through hole, b, b1, b2, b3, b11, b21, b31...thickness, c1...axis, E, E1, E2, E3, E4, E5, E6, E7...Young's modulus, h1, h2, h3, h11, h21, h31, h12, h22, h32...width, k, k1, k2, k3...spring strength, L, L1, L2, L3...length.

Claims

1. A watch component made of silicon, It comprises a plurality of holding parts arranged in the circumferential direction of the insertion hole through which the shaft is inserted, and which press the shaft toward the center of the insertion hole, The plurality of holding parts include a first holding part having a first elastic part and a second holding part having a second elastic part having a different shape from the first elastic part. Watch parts.

2. The first elastic portion and the second elastic portion have different lengths along the radial direction of the insertion hole. The watch component according to claim 1.

3. The first elastic part and the second elastic part have different lengths along the axial direction of the shaft. The watch component according to claim 1.

4. The first elastic portion and the second elastic portion have different lengths in the extending direction. The watch component according to claim 1.

5. The first holding part comprises n elastic parts, The second holding portion comprises m elastic parts different from the n mentioned above. The watch component according to claim 1.

6. A watch component made of silicon, having a through hole through which a shaft is inserted, The watch component comprises a rim portion having a plurality of teeth, and a plurality of retaining portions provided between the rim portion and the insertion hole, which press the shaft toward the center of the insertion hole. The plurality of holding parts include a first holding part and a second holding part adjacent to the first holding part. The first retaining portion has a contact portion that abuts against the shaft and an elastic portion that presses the contact portion toward the center of the insertion hole, The second holding portion has a contact portion that abuts against the shaft and an elastic portion that presses the contact portion toward the center of the insertion hole, The elastic portion of the first retaining part and the elastic portion of the second retaining part have different shapes. Watch parts.

7. A clock comprising the clock components described in claims 1 to 6.

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