JP4618664B2 - Electroformed part including elastic part and manufacturing method thereof - Google Patents

Description

  The present invention relates to an electroformed part including an elastic portion and a method for manufacturing the same. In particular, the present invention relates to a method for manufacturing a part in which a bearing or the like is fixed to an electroformed part, and an electroformed part such as a part for a mechanical watch or a part for an electronic watch made by the manufacturing method. Furthermore, the present invention relates to a mechanical timepiece including at least one electroformed part made by the manufacturing method and an analog electronic timepiece including at least one electroformed part made by the manufacturing method.

In the first type of prior art, in the prior art of a timepiece bearing structure, a bearing frame is fixed in a circular hole of a receiving member, and a bearing is fixed in the circular hole of the bearing frame. Furthermore, the axles of the parts constituting the train wheel can be guided and rotated by the center hole of the bearing. Generally, the bearing is made of ruby. In the conventional watch bearing structure, the bearing is directly fixed to the circular dish portion of the receiving member (see Patent Document 1).
Further, in the second type of prior art, in the prior art timepiece, the lower support surface of the second wheel formed of metal such as carbon steel can be rotated on the upper surface of the center pipe formed of metal such as carbon steel. (See Patent Document 2). Furthermore, in the timepiece of the prior art, the cylindrical portion of the minute hook formed of a metal such as carbon steel is fixed to the center hole of the minute gear. Furthermore, in the timepiece of the prior art, the center hole of the small wheel formed of metal such as carbon steel is rotatably incorporated in the cylindrical portion of the pin of the main plate formed of metal such as brass.

Furthermore, in the third type of prior art, an ankle base is made, this base is transferred to a resin mold, a mother mold is formed, and a conductive film is formed on the entire surface of the resin mold. The ankle of the watch is formed by casting (see Patent Document 3).
Further, in the conventional electroforming process, a mother die is made. When the mother die is a conductor, the surface is subjected to a mold release treatment and the electrodeposition process is started. When the mother die is a non-conductor, the mother die is used. After the mold surface is made into a conductor, a mold release process is performed and an electrodeposition process is started. After electrodeposition to the required thickness, the electroformed part is peeled off from the mother mold (see Non-Patent Document 1).

Japanese Utility Model Publication No. 53-43958 (first page, FIGS. 1 to 3) Japanese Patent Laid-Open No. 2003-194970 (pages 5 to 6, FIGS. 1 to 4) Japanese Patent Laid-Open No. 48-44138 (pages 2 to 4 and FIG. 4) Toshikazu Sato, “Special Processing”, pp. 235-261, 1st edition published in 1981, 8th edition published in 1997, Yokendo

  Conventionally, a precious stone bearing formed of ruby or the like is generally used for a bearing portion of a watch from the viewpoint of wear resistance. The ruby bearing is fixed by press fitting to a bearing guide formed on a train wheel bridge or a main plate. However, ruby is a brittle material and sometimes has a problem of cracking due to a load generated during press-fitting. In addition, when the mechanical strength of the bearing guide part for fixing the ruby bearing is low, or when the bearing guide part for fixing the ruby bearing is non-uniform in shape, if the ruby bearing is press-fitted into the bearing guide part, There is a possibility that the guide part may be damaged or the bearing guide part may be deformed to cause a displacement of the ruby bearing. In addition, when a bearing made of a brittle material such as ruby is press-fitted into a high-elasticity component made of a material having a high elastic modulus such as an iron-based material such as carbon steel, the press-fit portion of the press-fitted bearing High compressive stress is generated. Therefore, conventionally, it has been extremely difficult to press-fit a ruby bearing directly into carbon steel. Conventionally, in response to the above problems, a cushioning part such as a hole stone frame configured separately from the high-elasticity part is provided in the bearing guide portion of the high-elasticity part, and this cushioning part is press-fit into the high-elasticity part In addition, a ruby bearing is press-fitted into the cushioning component. However, in the case of micro parts such as watch parts, there is a problem that it is difficult to manufacture and assemble buffer parts.

  An object of the present invention is to provide an electroformed component capable of press-fitting a bearing formed of a brittle material such as ruby, and a manufacturing method thereof. Another object of the present invention is to provide an electroformed component capable of press-fitting a bearing into a component having a shape in which the diameter of the bearing guide portion is small and the bearing guide portion may be destroyed if the bearing is press-fitted. It is in providing the manufacturing method.

  The present invention includes (a) a step of manufacturing an electroformed part including an elastic portion by electroforming, and a step of holding a bearing member by the elastic portion of the electroformed component in the method of manufacturing an electroformed component. It is characterized by. In addition, the present invention provides a method for producing an electroformed component, comprising: (a) preparing an electroforming mold in which a cavity for forming the electroformed component is formed in order to produce the electroformed component; Forming a metal thin film on the mold, forming a surface conductor for electroforming, and forming a mold cavity having a shape corresponding to the outer shape of the electroformed part to be manufactured; The process of providing a resist layer on the surface of the metal thin film, (e) forming the electroformed part in the mold cavity by electroforming the electroforming mold, and (o) electroforming the electroformed part And taking out from the mold cavity of the mold, wherein the electroformed part includes an elastic part, and (i) includes a step of holding the bearing member by the elastic part of the electroformed part. By using this method, it is possible to easily incorporate the bearing member into a material that could not be incorporated in the conventional bearing member.

  In the method of the present invention, the bearing member can be held at the tip of the elastic portion. Or in the method of this invention, a bearing member can be hold | maintained in the intermediate part of each of a some elastic part. By this method, the bearing member can be reliably held without being damaged. Furthermore, in the method of the present invention, the elastic part is preferably formed so that the aspect ratio (length / width) is 1 to 500. Furthermore, in the method of the present invention, the elastic part is preferably formed so that the thickness / width ratio is 1 to 300. Furthermore, according to the present invention, an electroformed part including an elastic part, which is manufactured by the above method, can be provided. By this method, it is possible to reliably form an elastic portion having a dimension and shape that cannot be manufactured by the prior art.

  Furthermore, the present invention includes a center pipe spring that is manufactured by electroforming and includes an elastic part, and a center pipe hole stone that is held by the elastic part of the center pipe spring. It is characterized by. Furthermore, the present invention is characterized in that the timepiece ankle includes an ankle body that is manufactured by electroforming and includes an elastic portion, and an ankle true that is held by the elastic portion of the ankle body. Furthermore, the present invention is a wheel train component for a watch, and includes a gear body that is manufactured by electroforming and includes an elastic portion, and a bearing member that is held by the elastic portion of the gear body. To do. Furthermore, the present invention relates to a gear train component for a watch, which is manufactured by electroforming and includes a gear body including an elastic portion, a bearing member held by the elastic portion of the gear body, and fixed to the gear body. It is characterized by including a “kana” including a pinion gear portion. By using this method, it is possible to efficiently manufacture precision machine parts such as watches. In this specification, “kana” means a small gear (pinion). Furthermore, according to the present invention, it is possible to provide a mechanical timepiece including at least one of the electroformed parts manufactured by any of the methods described above. Furthermore, according to the present invention, an analog electronic timepiece including at least one of the electroformed parts manufactured by any of the above methods can be provided.

  When the manufacturing method of the present invention is used, a material that cannot conventionally incorporate a bearing member (for example, a material having a high elastic modulus and a large load generated when the bearing member is press-fitted like an iron-based material) On the other hand, the bearing member can be easily incorporated. In addition, when the manufacturing method of the present invention is used, the diameter of the portion that guides the bearing member is small in the receiving member or the like that incorporates the bearing member, and has a shape that may be destroyed when the bearing member is press-fitted. The bearing member can be easily incorporated into the receiving member. Furthermore, when the manufacturing method of the present invention is used, it is difficult to manage the dimensions of tools and jigs, and it is difficult to process the spring part when it is formed by cutting or pressing in the prior art. A machine part including a spring portion in which stress is generated can be efficiently manufactured.

Embodiments of the present invention will be described below in detail with reference to the drawings.
(1) 1st Embodiment Below, the 1st Embodiment of this invention is described.
(1.1) Method for Producing Electroformed Parts Hereinafter, a method for producing electroformed parts in the first embodiment of the present invention will be described. Referring to FIG. 1A, an electroforming mold 720 used for manufacturing an electroformed part is prepared (step 701). The material constituting the electroforming mold 720 is silicon, glass, plastic, or the like. The electroforming mold 720 can be processed by a method such as DRIE. Cavities 720a and 720d for forming electroformed parts are formed on the upper surface of the electroforming mold 720. The cavity 720a and the cavity 720d communicate with each other and are provided in the electroforming mold 720 so as to form one electroformed part. The cavity 720a is provided to form a spring portion. The cavity 720d is provided to form a portion that is not a spring portion, for example, a base portion such as a holding portion, a coupling portion, a base portion, or a gear portion. The cavity 720a includes a side wall 720b and a bottom surface 720c. The cavity 720d includes a side wall 720e and a bottom surface 720f. The size of the electroforming mold 720 is preferably in the range of 1 mm to 160 mm, for example. The thickness of the electroforming mold 720 is preferably in the range of 0.01 mm to 3 mm, for example.

  Referring to FIG. 1B, on the surface of the electroforming mold 720, on the surface of the side wall 720b of the cavity 720a, on the surface of the bottom surface 720c, on the surface of the side wall 720e of the cavity 720d, and on the surface of the bottom surface 720f. A metal thin film 724 is formed on the surface to make a surface conductor for electroforming (step 702). The metal thin film 724 formed in this step 702 can be made of, for example, Au (gold), Ag (silver), Cu (copper), Ni (nickel), or the like. The metal thin film 724 can be attached by a method such as sputtering, vapor deposition, or electroless plating. The thickness of the metal thin film 724 is preferably in the range of several nm (discontinuous film) to several μm. When the metal thin film 724 is formed, a mold cavity 720g having a shape corresponding to the outer shape of the spring part of the electroformed part to be manufactured and a mold cavity having a shape corresponding to the outer shape of the base part of the electroformed part to be manufactured 720h is formed.

  Referring to FIG. 1C, the metal in the region where the electroformed metal is not deposited on the upper surface of the electroforming mold 720 except for the surface of the side wall and bottom surface of the mold cavity 720g and the surface of the side wall and bottom surface of the mold cavity 720h. A resist layer 728 is provided on the surface of the thin film 724 (step 703). Referring to FIG. 1D, an electroforming process is performed on the electroforming mold 720 to form an electroforming component 730 in the mold cavity 720g and the mold cavity 720h (step 704).

  In the case of forming a machine part, the electroformed metal forming the electroformed part 730 is made of chromium, nickel, iron, etc. having high hardness in consideration of slidability when used for a structure such as a gear. It can comprise with the alloy containing. In addition, the electroformed metal forming the electroformed part 730 can be composed of gold, silver, copper, nickel, chromium, and an alloy containing these when used in a structure having high decorativeness. In addition, the characteristics are such that the inner surface of the structure is composed of chromium, nickel, iron, and alloys containing these with high hardness, and the surface of the structure is composed of tin, zinc, and alloys containing these with low hardness. The electroformed part 730 can be composed of two or more kinds of metals or alloys different from each other. In addition, the electroformed component 730 can be made of an alloy having different metal compositions between the surface and the inner surface of the structure. The electroformed component 730 includes a spring portion 730b and a base portion 730c. The thickness of the electroformed component 730 is preferably set to be thinner than the depth of the mold cavity 720g and to be thinner than the depth of the mold cavity 720h. The spring part 730b can be formed to have a width of 0.01 mm to 3 mm, a thickness of 0.01 mm to 3 mm, and a length of 0.01 mm to 1 mm, for example. The spring part 730b can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The spring part 730b can be formed so that the ratio of thickness / width is 1 to 300, for example. When the spring portion 730b having such dimensions is formed by cutting or pressing in the prior art, it is difficult to manage the dimensions of the tool and the jig, and it is difficult to process the spring portion 730b. Residual stress was generated. Therefore, it is difficult to manage the size of the spring portion 730b having such dimensions, and the conventional technique cannot be formed to have high dimensional accuracy. The base portion 730c can be formed to have a thickness of 0.01 mm to 3 mm, for example.

  Next, a specific method of electroforming will be described with reference to FIG. Referring to FIG. 2 (a), it is necessary to select an electroforming liquid according to a metal material to be electroformed. For example, in a nickel electroforming process, a sulfamic acid bath, a watt bath, a sulfuric acid bath, or the like is used. When performing nickel electroforming using a sulfamic acid bath, a sulfamic acid bath electroforming liquid 142 containing nickel sulfamate hydrate as a main component is placed in a treatment tank 140 for electroforming. An anode electrode 144 made of a metal material to be electroformed is immersed in the sulfamic acid bath 142. For example, the anode electrode 144 can be configured by preparing a plurality of balls made of a metal material to be electroformed and placing the metal balls in a metal cage made of titanium or the like. The electroforming mold 148 to be electroformed is immersed in the sulfamic acid bath 142. Referring to FIG. 2B, when the electroforming mold 148 is connected to the cathode of the power source 160 and the anode electrode 144 is connected to the anode of the power source 160, the metal constituting the anode electrode 144 is ionized and moves in the sulfamic acid bath. Then, it is deposited as a metal on the mold cavity 148 f of the electroforming mold 148. A valve (not shown) can be connected to the processing tank 140 via a pipe (not shown). A filter for filtration is provided in the piping, and the sulfamic acid bath discharged from the treatment tank 140 can be filtered. The filtered sulfamic acid bath can be returned to the treatment tank 140 from an injection pipe (not shown).

  After forming the electroformed part 730 in the mold cavity 720g and the mold cavity 720h, the electroformed part 730 is taken out from the mold cavity 720g and the mold cavity 720h (step 705). Referring to FIG. 1 (f), a plan view of the electroformed part 730 is shown. The electroformed component 730 is manufactured to include a spring portion 730b and a base portion 730c. Therefore, according to the present invention, the electroformed component 730 having an elastic portion (that is, a spring portion configured to be elastically deformable) can be efficiently manufactured by a simple process.

(1.2) Structure of Analog Electronic Timepiece The first embodiment of the present invention described below relates to a timepiece having a train wheel, that is, an analog electronic timepiece. However, the present invention is not limited to an analog electronic timepiece, and can be widely applied to bearing members, support members, gear members, and the like of measuring instruments, printing presses, video equipment, recording equipment, recording equipment, and the like.

  3 to 6, in the first embodiment of the present invention, a movement (machine body) 100 of an analog electronic timepiece has a main plate 102 constituting a substrate of the movement. A winding stem 110 is rotatably incorporated in a winding stem guide hole of the main plate 102. A dial 104 (shown in phantom lines in FIG. 2) is attached to the movement 100. The movement 100 includes a switching spring 166 for determining the position of the winding stem 110 in the axial direction. On the “front side” of the movement 100, a battery 120, a circuit block 116, an hour motor 210, an hour display wheel train 220, a minute motor 240, a minute display wheel train 250, a second motor 270, a second display train wheel 280, and the like are arranged. . The main plate 102, the train wheel bridge 112, and the second ring bridge 114 constitute a support member. The hour display train wheel 220 is rotated by the rotation of the hour motor 210, and “hour” of the current time is displayed by the hour hand 230. The minute display wheel train 250 is rotated by the rotation of the minute motor 240, and “minute” of the current time is displayed by the minute hand 260. The second display train 280 is rotated by the rotation of the second motor 270, and “second” of the current time is displayed by the second hand 290.

  The IC 118 and the crystal unit 122 are attached to the circuit block 116. The circuit block 116 is fixed to the main plate 102 and the train wheel bridge 112 by the switch spring 162 through the insulating plate 160. The switching spring 166 is integrally formed with the switch spring 162. The battery 120 constitutes a power source of the analog electronic timepiece. As a power source of the analog electronic timepiece, a rechargeable secondary battery or a chargeable capacitor can be used. The crystal unit 122 constitutes the source oscillation of an analog electronic timepiece, and oscillates at 32,768 hertz, for example.

  Referring to FIGS. 3 and 4, the second motor 270 includes a second coil block 272, a second stator 274, and a second rotor 276. When the second coil block 272 receives a second motor drive signal, the second stator 274 is magnetized to rotate the second rotor 276. The second rotor 276 is configured to rotate 180 degrees every second, for example. Second rotor 276 includes an upper shaft portion 276a, a lower shaft portion 276b, a pinion portion 276c, and a rotor magnet 276d. The upper shaft portion 276a, the lower shaft portion 276b, and the kana portion 276c are formed of a metal such as carbon steel. Based on the rotation of the second rotor 276, the second wheel 284 is configured to rotate via the rotation of the second transmission wheel 282. Second transmission wheel 282 includes an upper shaft portion 282a, a lower shaft portion 282b, a pinion portion 282c, and a gear portion 282d. The pinion portion 276c is configured to mesh with the gear portion 282d. The upper shaft portion 282a, the lower shaft portion 282b, and the kana portion 282c are formed of a metal such as carbon steel. The gear portion 282d is formed of a metal such as brass.

  The second wheel 284 is configured to rotate once per minute. The second wheel 284 includes an upper shaft portion 284a, an abacus ball portion 284b, and a gear portion 284d. The pinion portion 282c is configured to mesh with the gear portion 284d. The upper shaft portion 284a and the abacus ball portion 284b are formed of a metal such as carbon steel. The gear portion 284d is formed of a metal such as brass. A second hand 290 is attached to the second wheel 284. The second wheel 284 may be disposed at the center of the analog electronic timepiece, or may be disposed at a position different from the center of the analog electronic timepiece. The second hand 290 constitutes a second display member. As the second display member, a second hand may be used, a disk may be used, or a display member having another shape including a flower or a geometric shape may be used. The second display train wheel 220 includes a second transmission wheel 282 and a second wheel 284. The second rotor 276 and the second transmission wheel 282 are rotatably supported by the main plate 102 and the train wheel bridge 112. The second wheel 284 is rotatably supported with respect to the center pipe 126 and the train wheel bridge 112 provided in the second receiver 114. That is, the upper shaft portion 276a of the second rotor 276, the upper shaft portion 282a of the second transmission wheel 282, and the upper shaft portion 284a of the second wheel 284 are rotatably supported by the train wheel bridge 112. The center pipe 126 is made of a metal such as carbon steel. Further, the lower shaft portion 276 b of the second rotor 276 and the lower shaft portion 282 b of the second transmission wheel 282 are rotatably supported by the main plate 102.

  4 and 5, the center pipe 126 is formed of a metal such as carbon steel. A dish portion 126 c is formed on the upper surface of the center pipe 126. A center pipe spring 127 is incorporated in the dish portion 126c. A central pipe hole stone 128 is incorporated inside the central pipe spring 127. The central pipe hole stone 128 is formed of a brittle material such as ruby or ceramic. The center pipe spring 127 is manufactured by electroforming by the manufacturing method described in FIG. The center pipe spring 127 can be formed of nickel, copper, or the like, for example. Referring to FIG. 7, the center pipe spring 127 has three outer peripheral portions 127 a, 127 b, 127 c that are formed in a convex shape toward the outside and are arranged to have an opening angle of approximately 1/6 of the arc. It includes three holding portions 127f, 127g, and 127h that are formed in a convex shape toward the center and are arranged so as to have an opening angle of approximately 1/6 of the arc. The holding part 127f is located between the outer peripheral part 127a and the outer peripheral part 127b. The holding part 127g is located between the outer peripheral part 127b and the outer peripheral part 127c. The three holding portions 127f, 127g, and 127h constitute an elastic portion that can be elastically deformed in the radial direction. The three outer peripheral portions 127a, 127b, and 127c may constitute elastic portions that can be elastically deformed in the radial direction, or the three outer peripheral portions 127a, 127b, and 127c may not be elastically deformed in the radial direction. It can also be configured. The holding portion 127h is located between the outer peripheral portion 127c and the outer peripheral portion 127a. The insides of the three holding portions 127f, 127g, and 127h constitute a guide portion 127k for receiving the central pipe hole stone 128. The center pipe hole stone 128 is held at an intermediate portion of each of the three holding portions 127f, 127g, and 127h.

  The outer peripheral portions 127a, 127b, and 127c can be formed to have a width of 0.01 mm, a thickness of 0.5 mm, and a length of 0.7 mm, for example. The outer peripheral portions 127a, 127b, and 127c can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The outer peripheral portions 127a, 127b, and 127c can be formed so that the thickness / width ratio is 2 to 300, for example. The holding portions 127f, 127g, and 127h can be formed to have a width of 0.01 mm, a thickness of 0.5 mm, and a length of 0.7 mm, for example. The holding portions 127f, 127g, and 127hc can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The holding portions 127f, 127g, and 127h can be formed so that the thickness / width ratio is 2 to 300, for example. When the outer peripheral portions 127a, 127b, 127c, holding portions 127f, 127g, 127h having such dimensions are formed by cutting or pressing in the prior art, it is difficult to manage the dimensions of the tools and jigs, and the processing is difficult. There was residual stress in the material during processing. Therefore, the outer peripheral portions 127a, 127b, 127c and the holding portions 127f, 127g, 127h having such dimensions are difficult to manage the dimensions, and cannot be formed with high dimensional accuracy in the prior art.

  Referring to FIGS. 4 and 5, first, the center pipe spring 127 is assembled in the dish portion 126 c formed on the upper surface of the center pipe 126. Next, a central pipe hole stone 128 (indicated by a two-dot chain line in FIG. 7) constituting the bearing member is disposed in a guide portion 127k configured inside the three holding portions 127f, 127g, and 127h. Since the center pipe spring 127 is formed so as to be deformable in the radial direction as a whole, the center pipe hole stone 128 can be reliably held without damaging the center pipe hole stone 128.

  Referring to FIG. 8, as a modification, the center pipe spring 129 is formed in a ring shape, and has three outer peripheral ring portions 129 a, 129 b, and 129 c arranged so as to have an opening angle of approximately 1/6 of an arc. , And three connecting portions 129f, 129g, and 129h that are convex toward the outside and are arranged to have an opening angle of approximately 1/6 of the arc. The connecting portion 127f is located between the outer peripheral ring portion 127a and the outer peripheral ring portion 127b. The connecting portion 127g is located between the outer ring portion 127b and the outer ring portion 127c. The connecting portion 127h is located between the outer ring portion 127c and the outer ring portion 127a. The inner sides of the three outer ring portions 129a, 129b, and 129c constitute a guide portion 129k for receiving the central pipe hole stone 128b.

  The outer peripheral ring portions 129a, 129b, and 129c can be formed to have a width of 0.01 mm and a thickness of 0.5 mm, for example. The outer peripheral ring portions 129a, 129b, and 129c can be formed so that the thickness / width ratio is 2 to 300, for example. The connecting portions 129f, 129g, and 129h can be formed to have a width of 0.01 mm, a thickness of 0.5 mm, and a length of 0.7 mm, for example. The connecting portions 129f, 129g, and 129h can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The connecting portions 129f, 129g, and 129h can be formed to have a thickness / width ratio of 2 to 300, for example. The outer ring portions 129a, 129b, 129c, the connecting portions 129f, 129g, and 129h having such dimensions are difficult to be processed because it is difficult to manage the dimensions of the tools and jigs by cutting or pressing in the prior art. Thus, residual stress was generated inside the material during processing. Therefore, the outer ring portions 129a, 129b, 129c and the connecting portions 129f, 129g, 129h having such dimensions are difficult to manage the dimensions, and cannot be formed with high dimensional accuracy in the prior art. .

  Referring to FIGS. 4 and 5, in the modified example, first, the center pipe spring 129 is incorporated in the plate portion 126 c formed on the upper surface of the center pipe 126. Next, the center pipe hole stone 128 (indicated by a two-dot chain line in FIG. 8) is disposed in a guide portion 129k configured inside the three outer peripheral ring portions 129a, 129b, and 129c. Since the center pipe spring 129 is formed so as to be deformable in the radial direction as a whole, the center pipe hole stone 128 can be reliably held without damaging the center pipe hole stone 128. In addition, with this configuration, the second wheel 284 has a small friction coefficient and comes into contact with the center pipe hole stone 128 formed of ruby or the like having a smooth surface, thereby reducing the frictional resistance when the front train wheel rotates. Can do. Therefore, with this configuration, the output torque of the second motor for rotating the second wheel 284 can be reduced, and the battery life of the timepiece can be extended.

  Referring to FIGS. 3 to 6, the bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 276 a of the second rotor 276 and the train wheel train receiver that rotatably supports the upper shaft portion 282 a of the second transmission wheel 282. Lubricating oil is injected into the bearing portion 112 and the bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 284 a of the second wheel 284. Lubricating oil is injected into the bearing portion of the base plate 102 that rotatably supports the lower shaft portion 276b of the second rotor 276 and the bearing portion of the base plate 102 that rotatably supports the lower shaft portion 282b of the second transmission wheel 282. . This lubricating oil is preferably a precision machine oil, particularly preferably a so-called watch oil. An example of such a watch oil is “Mavis A ™” available from Mavis.

  It is preferable to provide a conical, cylindrical, or frusto-conical oil reservoir in each bearing portion of the train wheel bridge 112 and each bearing portion of the main plate 102 in order to improve the lubricating oil retention performance. . Providing the oil reservoir can effectively prevent the oil from diffusing due to the surface tension of the lubricating oil. The date dial 170 is supported rotatably with respect to the main plate 102. A date dial holder 172 supports the date dial 170 with respect to the main plate 102. It is preferable to lubricate the contact portion between the tooth tip portion of the date dial 170 and the main plate 102. This lubricating oil is preferably a precision machine oil, particularly preferably a so-called watch oil.

  3 to 6, the battery minus terminal 170 is attached to the main plate 102. The battery minus terminal 170 conducts the cathode of the battery 120 and the minus input portion Vss of the IC 118 through the minus pattern of the circuit block 116. A battery retainer 172 is attached to the switch spring 162. The battery retainer 172 and the switch spring 162 conduct the anode of the battery 120 and the plus input portion Vdd of the IC 118 through the plus pattern of the circuit block 116. 3 and 5, the minute motor 240 includes a minute coil block 242, a minute stator 244, and a minute rotor 246. When the minute coil block 242 receives the minute motor drive signal, the minute stator 244 is magnetized to rotate the minute rotor 246. The minute rotor 246 is configured to rotate 180 degrees every 20 seconds, for example. The minute rotor 246 includes an upper shaft portion 246a, a lower shaft portion 246b, a pinion portion 246c, and a rotor magnet 246d. The upper shaft portion 246a, the lower shaft portion 246b, and the kana portion 246c are formed of a metal such as carbon steel.

  The minute transmission wheel 252 is rotated based on the rotation of the minute rotor 246, and the minute wheel 256 is rotated via the second transmission wheel 254 based on the rotation of the first minute transmission wheel 252. The most minute transmission wheel 252 includes an upper shaft portion 252a, a lower shaft portion 252b, a pinion portion 252c, and a gear portion 252d. The pinion portion 246c is configured to mesh with the gear portion 252d. The upper shaft portion 252a, the lower shaft portion 252b, and the kana portion 252c are formed of a metal such as carbon steel. The gear portion 252d is formed of a metal such as brass. The second transmission wheel 254 includes an upper shaft portion 254a, a lower shaft portion 254b, a pinion portion 254c, and a gear portion 254d. The pinion portion 252c is configured to mesh with the gear portion 254d. The upper shaft portion 254a, the lower shaft portion 254b, and the kana portion 254c are formed of a metal such as carbon steel. The gear portion 254d is formed of a metal such as brass. The minute wheel 256 includes a cylindrical portion 256a and a gear portion 256d. The pinion portion 254c is configured to mesh with the gear portion 256d. The cylindrical portion 256a is formed of a metal such as carbon steel. The gear portion 256d is formed of a metal such as brass.

  The minute wheel 256 is configured to rotate once per hour. A minute hand 260 is attached to the minute wheel 256. The rotation center of the minute wheel 256 is the same as the rotation center of the second wheel 284. The minute hand 260 forms a minute display member. As the minute display member, a minute hand may be used, a disk may be used, or a display member having another shape including a flower or a geometric shape may be used.

  The minute display wheel train 250 includes a first minute transmission wheel 252, a second minute transmission wheel 254, and a minute wheel 256. The minute rotor 246, the first minute transmission wheel 252, and the second minute transmission wheel 254 are rotatably supported by the main plate 102 and the train wheel bridge 112. The minute wheel 256 comes into contact with the outer peripheral portion of the center pipe 126 provided in the second receiver 114 and is rotatably supported. That is, the upper shaft portion 246a of the minute rotor 246, the upper shaft portion 252a of the first minute transmission wheel 252 and the upper shaft portion 254a of the second minute transmission wheel 254 are rotatably supported by the train wheel bridge 112. Is done. Further, the lower shaft portion 246b of the minute rotor 246, the lower shaft portion 252b of the first minute transmission wheel 252 and the lower shaft portion 254b of the second minute transmission wheel 254 are rotatably supported with respect to the main plate 102. .

  A bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 246a of the minute rotor 246; a bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 252a of the minute transmission wheel 252; Lubricating oil is injected into the bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 254a of the transmission wheel 254. The bearing portion of the lower shaft portion 246b of the minute rotor 246, the bearing portion of the main plate 102 that rotatably supports the lower shaft portion 252b of the first minute transmission wheel 252 and the lower shaft portion 254b of the second minute transmission wheel 254 are rotated. Lubricating oil is injected into the bearing portion of the main plate 102 that is supported. This lubricating oil is preferably a precision machine oil, particularly preferably a so-called watch oil. It is preferable to provide a conical, cylindrical, or frusto-conical oil reservoir in each bearing portion of the train wheel bridge 112 and each bearing portion of the main plate 102 in order to improve the lubricating oil retention performance. .

  With reference to FIGS. 3 and 6, the hour motor 210 includes an hour coil block 212, an hour stator 214, and an hour rotor 216. When the hour coil block 212 receives the hour motor drive signal, the hour stator 214 is magnetized to rotate the hour rotor 216. The hour rotor 216 is configured to rotate 180 degrees every 20 minutes, for example. The hour rotor 216 includes an upper shaft portion 216a, a lower shaft portion 216b, a kana portion 216c, and a rotor magnet 216d. The upper shaft portion 216a, the lower shaft portion 216b, and the kana portion 216c are formed of a metal such as carbon steel.

  Based on the rotation of the hour rotor 216, the hour transmission wheel 222 rotates. Based on the rotation of the hour transmission wheel 222, the hour wheel 226 is configured to rotate via the rotation of the second transmission wheel 224. The hour transmission wheel 222 includes an upper shaft portion 222a, a lower shaft portion 222b, a pinion portion 222c, and a gear portion 222d. The pinion portion 216c is configured to mesh with the gear portion 222d. The upper shaft portion 222a, the lower shaft portion 222b, and the kana portion 222c are formed of a metal such as carbon steel. The gear portion 222d is formed of a metal such as brass. The second transmission wheel 224 includes an upper shaft portion 224a, a lower shaft portion 224b, a pinion portion 224c, and a gear portion 224d. The pinion portion 222c is configured to mesh with the gear portion 224d. The upper shaft portion 224a, the lower shaft portion 224b, and the kana portion 224c are formed of a metal such as carbon steel. The gear portion 224d is formed of a metal such as brass. The hour wheel 226 includes a cylindrical portion 226a and a gear portion 226d. The pinion portion 224c is configured to mesh with the gear portion 226d. The hour wheel 226 is formed of a metal such as brass.

  The hour wheel 226 is configured to rotate once in 12 hours. An hour hand 230 is attached to the hour wheel 226. The rotation center of the hour wheel 226 is the same as the rotation center of the minute wheel 256. Therefore, the rotation center of the hour wheel 226, the rotation center of the minute wheel 256, and the rotation center of the second wheel 284 are the same. The hour hand 230 constitutes an hour display member. As the hour display member, an hour hand may be used, a disk may be used, or a display member having another shape including a flower or a geometric shape may be used. The hour display wheel train 220 includes a first hour transmission wheel 222, a second hour transmission wheel 224, and an hour wheel 226. The hour rotor 216, the first hour transmission wheel 222, and the second hour transmission wheel 224 are rotatably supported with respect to the main plate 102 and the train wheel bridge 112. The hour wheel 226 contacts the outer peripheral portion of the minute wheel 256 and is rotatably supported. That is, the upper shaft portion 216a of the hour rotor 216, the upper shaft portion 222a of the hour transmission wheel 222, and the upper shaft portion 224a of the second transmission wheel 224 are rotatably supported by the train wheel bridge 112. Is done. Further, the lower shaft portion 216b of the hour rotor 216, the lower shaft portion 222b of the hour transmission wheel 222, and the lower shaft portion 224b of the second transmission wheel 224 are rotatably supported with respect to the main plate 102. .

  A bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 216a of the hour rotor 216; a bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 222a of the hour transmission wheel 222; Lubricating oil is injected into the bearing portion of the train wheel bridge 112 that rotatably supports the upper shaft portion 224a of the hour transmission wheel 224. Rotating the bearing portion of the lower shaft portion 216b of the hour rotor 216, the bearing portion of the main plate 102 that rotatably supports the lower shaft portion 222b of the hour transmission wheel 222, and the lower shaft portion 224b of the second hour transmission wheel 224 Lubricating oil is injected into the bearing portion of the main plate 102 that is supported. This lubricating oil is preferably a precision machine oil, particularly preferably a so-called watch oil. It is preferable to provide a conical, cylindrical, or frusto-conical oil reservoir in each bearing portion of the train wheel bridge 112 and each bearing portion of the main plate 102 in order to improve the lubricating oil retention performance. . When the hour wheel 226 rotates, a date driving wheel (not shown) is configured to rotate. The date indicator driving wheel is provided to rotate once a day by the rotation of the hour wheel 226. A date indicator (not shown) provided on the date indicator driving wheel is configured to feed the date indicator 170 one tooth per day. As described above, the analog electronic timepiece to which the method for manufacturing an electroformed part of the present invention is applied preferably includes at least one of the electroformed parts manufactured by the method for manufacturing an electroformed part of the present invention.

(2) Second Embodiment Hereinafter, a second embodiment of the present invention will be described. In the following description, the difference between the second embodiment of the present invention and the first embodiment of the present invention will be mainly described. Therefore, the description of the first embodiment of the present invention described above applies mutatis mutandis to the portions not described below. The second embodiment of the present invention relates to a mechanical timepiece. However, the present invention is not limited to mechanical watches, and can be widely applied to bearing members, support members, gear members, and the like of measuring instruments, printing machines, video equipment, recording equipment, recording equipment, and the like.

(2.1) Structure of mechanical timepiece Next, an embodiment of a mechanical timepiece including an electroformed part to which the manufacturing method of the present invention is applied will be described. 9 to 12, in a mechanical timepiece, a movement (machine body) 300 of the mechanical timepiece has a main plate 302 constituting a substrate of the movement. A winding stem 310 is rotatably incorporated in a winding stem guide hole 302a of the main plate 302. A dial 304 (shown in phantom lines in FIGS. 10 to 12) is attached to the movement 300. In general, of the two sides of the main plate, the side with the dial is referred to as the “back side” of the movement, and the side opposite to the side with the dial is referred to as the “front side” of the movement. A train wheel incorporated in the “front side” of the movement is referred to as “front train wheel”, and a train wheel incorporated in the “back side” of the movement is referred to as “back train wheel”. The position of the winding stem 310 in the axial direction is determined by a switching device including a setting lever 390, a yoke 392, a yoke spring 394, and a yoke holder 396. A chisel wheel 312 is rotatably provided on the guide shaft portion of the winding stem 310.

  The pinion wheel 398 is arranged so as to be coaxial with the winding stem 310 with respect to the corner portion of the winding stem 310. When the winding stem 310 is rotated in a state where the winding stem 310 is in the first winding stem position (0 stage) closest to the inside of the movement along the rotation axis direction, the rotation of the pinion wheel 398 is rotated. It is comprised so that the wheel 312 may rotate through. The round hole wheel 314 is configured to rotate by the rotation of the chichi wheel 312. The square hole wheel 316 is rotated by the rotation of the round hole wheel 314. By rotating the square hole wheel 316, the mainspring 322 accommodated in the barrel complete 320 is wound up. The center wheel & pinion 324 is configured to rotate by the rotation of the barrel complete 320. The escape wheel & pinion 330 rotates through the rotation of the fourth wheel & pinion 328, the third wheel & pinion 326, and the second wheel & pinion 324. The barrel complete 320, the second wheel 324, the third wheel 326, and the fourth wheel 328 constitute a front train wheel.

  A small iron wheel 397 is arranged to be rotatable with respect to the main plate 302. A minute wheel 358 is arranged so as to be rotatable with respect to the main plate 302. The gear portion of the setting wheel 397 is configured to mesh with the gear portion of the minute wheel of the minute wheel 358. The gear portion of the minute wheel of the minute wheel 358 is configured to mesh with the gear portion of the cylindrical pinion 350. A pinion portion of the minute wheel 358 of the minute wheel 358 is configured to mesh with a gear portion of the hour wheel 354. A minute back presser 384 supports the small iron wheel 397 and the minute wheel 358 so as to be rotatable with respect to the main plate 302. When the winding stem 310 is rotated in a state where the winding stem 310 is in the second winding stem position (first stage) outside the movement along the rotation axis direction, the small wheel 397 is rotated through the rotation of the pinion wheel 398. Is configured to rotate. Further, when the winding stem 310 is rotated in a state where the winding stem 310 is in the first stage, the small wheel 397 is rotated so that the minute wheel 358 is rotated. In this state, when the minute wheel 358 is rotated, the hour pinion 350 and the hour wheel 354 are rotated, so that the hour hand 356 and the minute hand 352 are rotated so that the time of the clock can be adjusted. .

  The escapement and speed control device for controlling the rotation of the front train wheel includes a balance 340, an escape wheel 330 and an ankle 342. The balance with hairspring 340 includes a balance stem 340a, a balance wheel 340b, and a hairspring 340c. Based on the rotation of the center wheel & pinion 324, the cylindrical pinion 350 is rotated simultaneously. The minute hand 352 attached to the cylindrical pinion 350 displays “minute”. The cylindrical pinion 350 is provided with a slip mechanism for the center wheel & pinion 324. Based on the rotation of the hour pinion 350, the hour wheel 354 rotates through the rotation of the minute wheel 358. An hour hand 356 attached to the hour wheel 354 displays “hour”. The hairspring 340c is a thin plate spring having a spiral shape having a plurality of winding numbers. An inner end portion of the hairspring 340c is fixed to a whisker ball 340d fixed to the balance spring 340a, and an outer end portion of the hairspring 340c has a hairspring 370a attached to a hairspring receiver 370 fixed to the balance holder 366. It is fixed by screwing. A slow / fast needle 368 is rotatably attached to the balance holder 366. A beard receiver 1340 and a beard bar 1342 are attached to the slow and quick needle 368. A portion near the outer end portion of the hairspring 340 c is located between the hair support 1340 and the hair stick 1342. The balance with hairspring 340 is supported so as to be rotatable with respect to the main plate 302 and the balance with hairspring 366.

  The barrel complete 320 includes a barrel complete gear 320d, a barrel complete 320f, and a mainspring 322. The barrel complete 320f includes an upper shaft portion 320a and a lower shaft portion 320b. The barrel complete 320f is formed of a metal such as carbon steel. The barrel gear 320d is formed of a metal such as brass. The center wheel & pinion 324 includes an upper shaft portion 324a, a lower shaft portion 324b, a pinion portion 324c, a gear portion 324d, and an abacus ball portion 324h. The pinion 324c of the center wheel & pinion 324 is configured to mesh with the barrel gear 320d. The upper shaft portion 324a, the lower shaft portion 324b, and the abacus ball portion 324b are formed of a metal such as carbon steel. The gear portion 324d is formed of a metal such as brass. The third wheel & pinion 326 includes an upper shaft portion 326a, a lower shaft portion 326b, a pinion portion 326c, and a gear portion 326d. The pinion portion 326c of the third wheel & pinion 326 is configured to mesh with the gear portion 324d. The fourth wheel & pinion 328 includes an upper shaft portion 328a, a lower shaft portion 328b, a pinion portion 328c, and a gear portion 328d. The pinion portion 328c of the fourth wheel & pinion 328 is configured to mesh with the gear portion 326d. The upper shaft portion 328a and the lower shaft portion 328b are formed of a metal such as carbon steel. The gear portion 328d is formed of a metal such as brass. The escape wheel & pinion 330 includes an upper shaft portion 330a, a lower shaft portion 330b, a pinion portion 330c, and a gear portion 330d. The pinion portion 330c of the escape wheel & pinion 330 is configured to mesh with the gear portion 328d. The ankle 342 includes an ankle body 342d and an ankle true 342f. The ankle true 342f includes an upper shaft portion 342a and a lower shaft portion 342b.

  The barrel complete 320 is supported so as to be rotatable with respect to the main plate 302 and the barrel holder 360. That is, the upper shaft portion 320a of the barrel complete 320f is supported so as to be rotatable with respect to the barrel holder 360. The lower shaft portion 320b of the barrel complete 320f is rotatably supported with respect to the main plate 302. The second wheel 324, the third wheel 326, the fourth wheel 328, and the escape wheel 330 are supported so as to be rotatable with respect to the main plate 302 and the train wheel bridge 362. That is, the upper shaft portion 324 a of the second wheel 324, the upper shaft portion 326 a of the third wheel 326, the upper shaft portion 328 a of the fourth wheel 328, and the upper shaft portion 330 a of the escape wheel 330 are connected to the train wheel bridge 362. And is supported so as to be rotatable. In addition, the lower shaft portion 324 b of the center wheel 324, the lower shaft portion 326 b of the third wheel 326, the lower shaft portion 328 b of the fourth wheel 328, and the lower shaft portion 330 b of the escape wheel 330 are It is rotatably supported. The ankle 342 is supported so as to be rotatable with respect to the main plate 302 and the ankle receiver 363. That is, the upper shaft portion 342 a of the ankle 342 is supported so as to be rotatable with respect to the ankle receiver 363. The lower shaft portion 342b of the ankle 342 is rotatably supported with respect to the main plate 302.

  The bearing portion of the barrel holder 360 that rotatably supports the upper shaft portion 320a of the barrel complete 320f, the bearing portion of the train wheel bridge 362 that rotatably supports the upper shaft portion 324a of the center wheel 324, and the third wheel 326 The bearing portion of the train wheel bridge 362 that rotatably supports the upper shaft portion 326a, the bearing portion of the train wheel bridge 362 that rotatably supports the upper shaft portion 328a of the fourth wheel & pinion 328, and the escape wheel 330 Lubricating oil is injected into the bearing portion of the train wheel bridge 362 that rotatably supports the upper shaft portion 330a and the bearing portion of the ankle receiver 363 that rotatably supports the upper shaft portion 342a of the ankle 342. The bearing portion of the main plate 302 that rotatably supports the lower shaft portion 320b of the barrel complete 320f, the bearing portion of the main plate 302 that rotatably supports the lower shaft portion 324b of the center wheel 324, and the lower shaft of the third wheel 326 The bearing portion of the main plate 302 that rotatably supports the portion 326b, the bearing portion of the main plate 302 that rotatably supports the lower shaft portion 328b of the fourth wheel & pinion 328, and the lower shaft portion 320b of the escape wheel 330 are rotatable. Lubricating oil is injected into the bearing portion of the base plate 302 supported on the base plate 302 and the bearing portion of the base plate 302 that rotatably supports the lower shaft portion 342b of the ankle 342. This lubricating oil is preferably a precision machine oil, particularly preferably a so-called watch oil. In order to improve the lubricating oil retention performance, each bearing portion of the base plate 302, the bearing portion of the barrel holder 360, and each bearing portion of the train wheel bridge 362 has a conical, cylindrical, or truncated cone-shaped oil. It is preferable to provide a reservoir. Providing the oil reservoir can effectively prevent the oil from diffusing due to the surface tension of the lubricating oil. The base plate 302, the barrel holder 360 and the train wheel bridge 362 are made of metal such as brass.

(2.2) Manufacturing Method and Structure of Ankle Referring to FIGS. 13 and 14, the ankle 364 includes an ankle body 364b and an ankle true 364f. The ankle body 364b includes one or a plurality of spring portions 364c and a base portion 364d. Although FIG. 13 and FIG. 14 show three spring portions 364c, the number of spring portions 364c may be one, two, or three or more. Good. The number of spring portions 364c is preferably two or three. Each of the three spring portions 364c is preferably arranged at a position corresponding to approximately three sides of an equilateral triangle. Referring to FIG. 14, the ankle stem 364f constituting the bearing member is supported on the inner side of the three spring portions 364c. The ankle true 364f is held in the middle part of each of the three spring portions 364c. That is, the pallet truer 364f can be held by the elastic force of the three spring portions 364c. In addition, the enlarged view of the spring part 364c part of FIG. 13 and FIG. 14 is shown in FIG.13 (b) and FIG.14 (b), respectively.

  The ankle body 364b is manufactured by the method for manufacturing an electroformed component according to the first embodiment of the present invention described above with reference to FIGS. Therefore, the ankle body 364b constitutes an electroformed part having an elastic portion. The ankle body 364b is preferably formed of nickel, copper, or the like. For example, the spring portion 364c of the ankle body 364b is formed to have a width of 0.01 mm to 0.3 mm, a thickness of 0.01 mm to 0.3 mm, and a length of 0.01 mm to 2 mm. be able to. The spring portion 364c can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The spring portion 364c can be formed so that the thickness / width ratio is 1 to 15, for example. If the spring portion 364c having such dimensions is formed by cutting or pressing in the prior art, it is difficult to manage the dimensions of tools and jigs, and it is difficult to process the spring portion 364c, and the inside of the material during processing is difficult. Residual stress was generated. The base portion 364d can be formed to have a thickness of 0.01 mm to 0.15 mm, for example. Referring to FIG. 14, after forming an ankle body 364b without a sword tip and a pallet as an electroformed part, it is possible to bond an entering pallet 364m and an output pallet 364n to the ankle body 364b as secondary processing. . Furthermore, the sword tip 364p can be attached to the ankle body 364b as secondary processing. The sword tip 364p can be fixed by fitting the sword tip shaft portion 364r into the ankle body 364b, or can be fixed by adhering the sword tip shaft portion 364r to the ankle body 364b.

  As a modification, referring to FIG. 15, the ankle 364h includes an ankle body 364j and an ankle true 364f. The ankle body 364j can be manufactured in the same manner as the ankle body 364b described above. The ankle body 364j includes two spring portions 364k and a base portion 364m. Base portion 364m includes ankle true guide portion 364n formed so as to include a part of an arc in order to guide a portion of the outer peripheral portion of ankle trueness 364f. Each of the two spring portions 364k is preferably arranged at a position corresponding to approximately two sides of an equilateral triangle. The ankle true 364f is supported inside the two spring portions 364c and the ankle true guide portion 364n. With the configuration in which the two spring portions 364k and the ankle true guide portion 364n are provided, the position of the ankle true 364f can be accurately managed. The dimension of the spring part 364k can be configured similarly to the dimension of the spring part 364c described above. An enlarged view of the spring portion 364k portion of FIG. 15 is shown in FIG.

(2.3) Manufacturing Method and Structure of Small Iron Wheel Referring to FIGS. 16 and 17, the small iron wheel 397 includes a small iron vehicle body 397a and a small iron wheel hole stone 397g. The small iron vehicle body 397a includes a base portion 397b, a plurality of spring portions 397c extending from the base portion 397b, and a gear portion 397d. 16 and 17 show three spring portions 397c, the number of spring portions 397c may be two, or may be three or more. The number of spring portions 397c is preferably three. The three spring portions 397c are preferably arranged at an angular interval of 120 degrees with respect to the center of the small iron vehicle body 397a. The three spring portions 397c are preferably formed in the same shape. Referring to FIG. 17, the small wheel hole stone 397g constituting the bearing member is supported on the inner side of the tip end portions of the three spring portions 397c. That is, the small wheel 397g can be held by the elastic force of the three spring portions 397c. The small wheel hole stone 397g is formed of a brittle material such as ruby or ceramic.

  The small iron vehicle body 397a 'in a state where the gear is not machined is manufactured by the method for manufacturing the electroformed part in the first embodiment of the present invention described above with reference to FIGS. Therefore, the small iron vehicle body 397a 'in a state where the gear is not machined constitutes an electroformed part having an elastic portion. The spring portion 397c of the small iron vehicle body 397a 'in a state where the gear is not processed may be formed of nickel, copper, or the like. The spring portion 397c can be formed to have a width of 0.01 mm to 0.3 mm, a thickness of 0.01 mm to 0.3 mm, and a length of 0.1 mm to 2 mm, for example. The spring portion 397c can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The spring portion 397c can be formed so that the thickness / width ratio is 1 to 15, for example. When the spring portion 397c having such dimensions is formed by cutting or pressing in the prior art, it is difficult to manage the dimensions of tools and jigs, and it is difficult to process the spring portion 397c. Residual stress was generated. The base portion 397b can be formed to have a thickness of 0.01 mm to 0.15 mm, for example.

  After the small iron vehicle body 397a 'in a state where the gear is not processed is electroformed, the gear portion 397d of the small iron vehicle body 397a can be formed by pressing or gear cutting as secondary processing. The small wheel 397g with a hole stone constituting the bearing member can be manufactured by holding the small wheel wheel 397g inside the front end portion of the spring portion 397c of the small iron vehicle body 397a in which the gear portion 397d is formed. As described above, although the embodiment of the present invention has been described with respect to the small wheel 397, the present invention is not limited to the small wheel 397 which is a wheel train part for a watch, but also includes a number wheel, a transmission wheel, The present invention can be widely applied to other wheel train members such as a feeding wheel, a date driving wheel, a correction wheel, and a correction transmission wheel. Referring to FIG. 12, the center hole of the small wheel hole stone 397 g of the small iron wheel 397 is incorporated so as to be rotatable with respect to the small iron pin provided on the main plate 302.

(2.4) Manufacturing method and structure of a minute wheel Referring to FIG. 18, in the embodiment of the present invention, the minute wheel 358 includes a minute wheel 358a and a minute wheel pinion (kana: pinion gear). Part) 358k and a minute wheel hole stone 358g. The sun reverse gear 358a includes a base portion 358b, a plurality of spring portions 358c formed on the base portion 358b, and a gear portion 358d. Although FIG. 18 shows three spring portions 358c, the number of spring portions 358c may be two, or may be three or more. The number of spring portions 358c is preferably three. The three spring portions 358c are preferably arranged at an angular interval of 120 degrees with reference to the center of the minute gear 358a. The three spring portions 358c are preferably formed in the same shape. A minute wheel hole stone 358g constituting the bearing member is supported inside the three spring portions 358c. The minute wheel hole stone 358g is held in an intermediate portion of each of the three spring portions 358c. That is, it is configured such that the minute wheel hole stone 358g can be held by the elastic force of the three spring portions 358c. The sun shingle hole stone 358g is formed of a brittle material such as ruby or ceramic. The minute pinion 358k includes a center hole 358u and a pinion gear portion 358v.

  The sun reverse gear 358a 'in a state where the gear is not machined is manufactured by the method for manufacturing an electroformed part in the first embodiment of the present invention described above with reference to FIGS. Therefore, the sun reverse gear 358a 'in a state where the gear is not processed constitutes an electroformed part having an elastic portion. The sun reverse gear 358a 'in a state where the gear is not machined may be formed of nickel, copper or the like. The spring portion 358c can be formed to have a width of 0.01 mm to 0.3 mm, a thickness of 0.01 mm to 0.3 mm, and a length of 0.1 mm to 2 mm, for example. The spring portion 358c can be formed so that the aspect ratio (length / width) is 1 to 100, for example. The spring portion 358c can be formed so that the thickness / width ratio is 1 to 15, for example. When the spring portion 358c having such dimensions is formed by cutting or pressing in the prior art, it is difficult to manage the dimensions of tools and jigs, and it is difficult to process the spring portion 358c. Residual stress was generated. The base portion 358b can be formed to have a thickness of 0.01 mm to 0.15 mm, for example.

  The gear portion 358d can be formed by press forming or gear cutting as the secondary processing after electroforming the date back gear 358a 'when the gear is not processed. A minute wheel 358a with a hole stone constituting the bearing member can be manufactured by holding a minute wheel 358g inside the spring portion 358c of the minute wheel 358a in which the gear portion 358d is formed. . The reverse side 358k can be formed by lathe processing or the like. The minute wheel 358k can be manufactured by fixing the minute wheel pinion 358k to the minute gear 358a formed with the gear portion 358d. For example, by fitting a plurality of projections m provided on the minute pinion 358k into a window or hole 358n formed on the minute pinion 358a, the minute pinion 358k is fixed to the minute pinion 358a. be able to. Alternatively, the minute pinion 358k can be bonded to the minute wheel 358a. Alternatively, the date pinion 358k can be fixed to the date pinion gear 358a by welding or welding the date pinion pin 358k to the date pinion gear 358a.

  As described above, although the embodiment of the present invention has been described with respect to the minute wheel 358, the present invention is not limited to the minute wheel 358 which is a wheel train part for a watch, but is also included in the front wheel train. It can be widely applied to other wheel train members such as a transmission wheel, a feeding wheel, a date driving wheel, a correction wheel, and a correction transmission wheel. Referring to FIG. 12, the center hole of the minute wheel hole 358g and the center hole 358u of the minute wheel 358k are incorporated so as to be rotatable with respect to the minute pin provided on the main plate 302. As described above, the mechanical timepiece to which the method for producing an electroformed part of the present invention is applied preferably includes at least one of the electroformed parts produced by the method for producing an electroformed part of the present invention.

  By using the present invention, a receiving member holding a bearing member formed of a brittle material such as ruby, a gear, a wheel, a transmission wheel, a feeding wheel, a date driving wheel, a correction wheel, a correction transmission wheel, a center pipe, etc. The machine parts can be efficiently manufactured. In particular, the present invention is suitable for efficiently manufacturing a rotating part, a part including a gear, or a part in contact with the rotating part in a precision machine such as a timepiece.

FIG. 1 is a principle view for explaining a manufacturing process in the first embodiment of the present invention. FIG. 2 is a principle diagram for explaining an outline of electroforming in the first embodiment of the present invention. FIG. 3 is a plan view showing a schematic shape of the movement viewed from the front side in the first embodiment of the present invention (some components are omitted in FIG. 3). FIG. 4 is a schematic partial cross-sectional view showing a portion from the second motor to the second hand in the first embodiment of the present invention. FIG. 5 is a schematic partial cross-sectional view showing the minute hand portion from the minute motor in the first embodiment of the present invention. FIG. 6 is a schematic partial cross-sectional view showing the hour hand portion from the hour motor in the first embodiment of the present invention. FIG. 7 is a plan view showing a center pipe spring in the first embodiment of the present invention. FIG. 8 is a plan view showing a center pipe spring in a modification of the first embodiment of the present invention. FIG. 9 is a plan view showing a schematic shape on the front side of the movement in the second embodiment of the present invention (in FIG. 9, some parts are omitted, and the receiving member is indicated by a virtual line). FIG. 10 is a schematic partial cross-sectional view showing the part of the ankle from the barrel in the second embodiment of the present invention. FIG. 11 is a schematic partial cross-sectional view showing the portion of the balance wheel from the escape wheel in the second embodiment of the present invention. FIG. 12 is a schematic partial cross-sectional view showing portions of a winding stem, a small iron wheel, and a minute wheel in the second embodiment of the present invention. FIG. 13 is a plan view showing an ankle receiver in the second embodiment of the present invention. FIG. 14 is a plan view showing an ankle receiver in the second embodiment of the present invention. FIG. 15 is a plan view showing an ankle receiver in a modification of the second embodiment of the present invention. FIG. 16 is a plan view showing a small iron gear in the second embodiment of the present invention. FIG. 17 is a plan view showing a small wheel in the second embodiment of the present invention. FIG. 18 is an exploded perspective view showing a minute wheel in the second embodiment of the present invention.

Explanation of symbols

100 movement (machine body)
102 Main plate 112 Train wheel receiver 114 Second receiver 126 Central pipe 216 Hour rotor 226 Hour wheel 246 Minute rotor 256 Minute wheel 276 Second rotor 284 Second wheel 300 Movement (mechanical body)
302 ground plate 320 barrel wheel 324 second wheel 326 third wheel 328 fourth wheel 330 escape wheel 342 ankle 358 sun 363 parts

Claims (7)

In a method of manufacturing a center pipe spring for a watch with electroformed parts,
(A) a step of producing an electroformed part including the elastic portion (730b) by electroforming;
(I) holding a bearing member (128) formed of a brittle material by the elastic portion (730b) of the electroformed component (730),
The central pipe spring (127) includes three outer peripheral portions (127a, 127b, 127c) formed to protrude outward from the center of the central pipe spring (127), and the central pipe spring (127). 3 holding portions (127f, 127g, 127h) formed in a convex shape toward the center of the center pipe spring, and the three holding portions (127f, 127g, 127h) An elastic portion that is elastically deformable in the radial direction with respect to the center of (127);
The three holding parts (127f, 127g, 127h) constituting the elastic part are formed so that an aspect ratio (length / width) is 1 to 500,
The three holding portions (127f, 127g, 127h) constituting the elastic portion are formed so that a thickness / width ratio is 1 to 300,
In the center pipe spring (127), an inner side with respect to the centers of the three holding portions (127f, 127g, 127h) constitutes a guide portion (127k) for receiving the bearing member (128) .
A method characterized by that. In a method of manufacturing a center pipe spring for a watch with electroformed parts,
(A) preparing an electroforming mold (720) in which cavities (720a, 720d) for forming the electroformed part are formed in order to manufacture the electroformed part;
(Ii) Forming a metal thin film (724) on the electroforming mold (720), converting it into a surface conductor for electroforming, and forming a mold cavity (720g, having a shape corresponding to the outer shape of the electroformed part to be manufactured 720h),
A step of providing a resist layer (728) on the surface of the metal thin film (724) excluding the inside of the (c) mold cavity (720g, 720h);
(E) performing an electroforming process on the electroforming mold (720) and forming an electroformed part (730) in the mold cavity (720g, 720h);
(O) removing the electroformed part (730) from the mold cavity (720g, 720h) of the electroforming mold (720), and the electroformed part (730) includes an elastic part (730b),
(I) holding a bearing member (128) formed of a brittle material by the elastic portion (730b) of the electroformed component (730);
The central pipe spring (127) includes three outer peripheral portions (127a, 127b, 127c) formed to protrude outward from the center of the central pipe spring (127), and the central pipe spring (127). 3 holding portions (127f, 127g, 127h) formed in a convex shape toward the center of the center pipe spring, and the three holding portions (127f, 127g, 127h) An elastic portion that is elastically deformable in the radial direction with respect to the center of (127);
The three holding parts (127f, 127g, 127h) constituting the elastic part are formed so that an aspect ratio (length / width) is 1 to 500,
The three holding portions (127f, 127g, 127h) constituting the elastic portion are formed so that a thickness / width ratio is 1 to 300,
In the center pipe spring (127), an inner side with respect to the centers of the three holding portions (127f, 127g, 127h) constitutes a guide portion (127k) for receiving the bearing member (128) .
A method characterized by that. A central pipe for a watch, which is manufactured by electroforming and includes a central pipe spring (127) including an elastic part and a brittle material, and is held by the elastic part of the central pipe spring (127). A central pipe hole stone (128),
The central pipe spring (127) includes three outer peripheral portions (127a, 127b, 127c) formed to protrude outward from the center of the central pipe spring (127), and the central pipe spring (127). 3 holding portions (127f, 127g, 127h) formed in a convex shape toward the center of the center pipe spring, and the three holding portions (127f, 127g, 127h) An elastic portion that is elastically deformable in the radial direction with respect to the center of (127);
The three holding parts (127f, 127g, 127h) constituting the elastic part are formed so that an aspect ratio (length / width) is 1 to 500,
The three holding portions (127f, 127g, 127h) constituting the elastic portion are formed so that a thickness / width ratio is 1 to 300,
In the center pipe spring (127), the inner side with respect to the centers of the three holding portions (127f, 127g, 127h) constitutes a guide portion (127k) for receiving the center pipe hole stone (128). ,
A center pipe characterized by that. In a small iron wheel that is a train wheel part for a watch, the gear body (397a) manufactured by electroforming and including an elastic portion , and formed of a brittle material, and the elasticity of the gear body (397a). Bearing member (397 g) held by the portion,
The gear body (397a) includes a base portion (397b), three spring portions (397c) extending from the base portion (397b), and a gear portion (397d).
The three spring parts (397c) constituting the elastic part are arranged at an angular interval of 120 degrees with respect to the center of the gear body (397a), respectively.
The three spring portions (397c) are formed to have an aspect ratio (length / width) of 1 to 100,
The three spring portions (397c) constituting the elastic portion are formed so that a thickness / width ratio is 1 to 15,
A small wheel hole stone (397g) constituting the bearing member is supported on the inner side with respect to the center of the gear body (397a) at the tip of the three spring portions (397c), and the three springs The small wheel hole stone (397g) is configured to be held by the elastic force of the portion (397c).
A small train characterized by that. In a minute wheel that is a train wheel part for a watch, a gear body (358a) manufactured by electroforming and including an elastic portion , and formed of a brittle material, and the gear body (358a). A bearing member (358g) held by the elastic portion of the first member, and a "kana" (358k) including the pinion gear portion (358v) fixed to the gear body (358a),
The gear body (358a) includes a base portion (358b), three spring portions (358c) formed on the base portion (358b), and a gear portion 358d.
The three spring portions (358c) constituting the elastic portion are respectively arranged at an angular interval of 120 degrees with reference to the center of the reverse gear (358a),
The three spring portions (358c) constituting the elastic portion are formed so that an aspect ratio (length / width) is 1 to 100,
The three spring portions (358c) are formed to have a thickness / width ratio of 1 to 15,
The date wheel hole stone (358g) constituting the bearing member is supported on the inner side with respect to the center of the date wheel (358a) in the three spring portions (358c). By the elastic force of the spring portion (358c), it is configured to be able to hold the date wheel hole stone (358g),
A vehicle behind the sun characterized by that. A mechanical timepiece comprising at least one central pipe spring which is an electroformed part manufactured by the method according to claim 1 . An analog electronic timepiece comprising at least one central pipe spring, which is an electroformed part manufactured by the method according to claim 1 .

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