JP2022138685A - Base member, timepiece movement, timepiece, base member unit, and method of manufacturing base member unit - Google Patents

Abstract

To provide a base member capable of easily holding components made of different materials while preventing generation of foreign matter.SOLUTION: A base plate 10 has a first principal surface 11, a storage recess 20 formed on the first principal surface 11 to accommodate a bearing 40, and an opening-side edge 24 of a side surface 22 plastically deformed in such a way that an opening edge 21 of the storage recess 20 protrudes toward the inner side of the storage recess 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a base member, a timepiece movement, a timepiece, a base member unit, and a method of manufacturing the base member unit.

Conventionally, there is a technique disclosed in the following patent document, for example, as a configuration for attaching another component to a concave portion of a base member so as not to fall off.
Patent Document 1 discloses a resin product having a through hole in which a plurality of ridges extending parallel to the axial direction are formed on the inner wall, and a press-fitting member is press-fitted into the through hole to crush the ridges and obtain a reaction force. A structure is disclosed that is secured to a through hole by
Patent Document 2 discloses a terminal board having a protrusion formed thereon and a substrate provided with a hole for inserting the protrusion. A terminal board fixing structure for fixing a terminal board to a board is disclosed in which the terminal board is fixed to the board by crushing the tip of the projecting portion.

Japanese Patent No. 5464728 JP-A-2002-143933

However, with the technique disclosed in Patent Document 1, the peaks crushed by the press-fitting member may fall off and become foreign matter. Furthermore, when the technique disclosed in Patent Document 1 is applied to a metal base member, it is difficult to form ridges in the through holes. In addition, in the technique disclosed in Patent Document 2, in order to hold the part on the base member, it is necessary to crush and deform the tip of the part while the part is being inserted into the through-hole. occur. Therefore, it is desired to develop a base member that can easily hold parts made of various materials while suppressing the generation of foreign matter.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a base member, a timepiece movement, a timepiece, a base member unit, and a method of manufacturing a base member unit that can easily hold parts made of various materials while suppressing the generation of foreign matter.

The base member of the present invention includes a main surface, a storage recess that is open to the main surface and stores a component, and a deformation target that is plastically deformed so as to protrude inside the storage recess at the opening edge of the storage recess. and

According to the present invention, since the opening of the storage recess can be narrowed by plastic deformation of the portion to be deformed, when the component is stored in the storage recess, the method prevents excessive load from being applied to the base member and the component due to loose fit or the like. The parts can be inserted with As a result, chipping and burrs of the base member and parts that may occur when the part is press-fitted into the recess can be suppressed, and the part can be held in the recess regardless of the material of the part. Therefore, it is possible to obtain a base member that can easily hold parts made of various materials while suppressing the generation of foreign matter.

In the base member described above, the component may be a bearing.

ADVANTAGE OF THE INVENTION According to this invention, the brittle fracture of components which may arise when press-fitting components can be suppressed. Therefore, it is possible to improve the yield when holding the component on the base member.

The above-described base member may further include a protrusion formed around the opening edge of the storage recess on the main surface.

According to the present invention, by crushing the protrusion, the base portion of the protrusion can be plastically deformed so as to escape to the inside of the accommodation recess. Therefore, it is possible to obtain a base member that exhibits the above-described effects.

In the base member described above, the storage recess may have a bottom surface facing the opening side of the storage recess.

According to the present invention, the component can be positioned in the depth direction of the storage recess by bringing the component into contact with the bottom surface of the storage recess. Therefore, it is possible to accurately arrange the parts at desired positions on the base member.

In the above-described base member, the storage recess may have a side surface that faces an inclined direction toward the opening side of the storage recess.

According to the present invention, the component can be positioned in the depth direction of the storage recess by bringing the component into contact with the side surface of the storage recess. Therefore, it is possible to accurately arrange the parts at desired positions on the base member.

The base member may be either the main plate or the support member of the timepiece movement.

According to the present invention, it is possible to prevent the timepiece from malfunctioning due to foreign matter when incorporated into the timepiece. Therefore, it is possible to obtain a base member capable of improving the reliability of the timepiece.

A timepiece movement of the present invention comprises the base member described above.

According to the present invention, when incorporated in a timepiece, it is possible to prevent the timepiece from malfunctioning due to foreign matter generated from the base member or parts. Therefore, the reliability of the timepiece can be improved.

A timepiece according to the present invention includes the timepiece movement described above.

According to the present invention, it is possible to provide a timepiece with excellent reliability.

A base member unit according to the present invention includes a component and a base member that holds the component, the base member having a main surface, a storage recess opening in the main surface and containing the component, and a plastically deformed portion that is plastically deformed at an opening edge of the storage recess to protrude inside the storage recess and is in contact with the component.

According to the present invention, since the opening of the storage recess is narrowed by the plastic deformation of the opening edge of the storage recess, when the component is housed in the storage recess, there is no excessive load applied to the base member and the component due to loose fit or the like. The parts can be inserted with Since the plastically deformed portion contacts the component at the opening edge of the storage recess, the component stored in the storage recess can be held so as not to fall off. As a result, chipping and burrs of the base member and parts that may occur when the part is press-fitted into the recess can be suppressed, and the part can be held in the recess regardless of the material of the part. Therefore, it is possible to obtain a base member unit that suppresses the generation of foreign matter that accompanies the assembly of parts to the base member.

A method of manufacturing a base member unit according to the present invention includes a recess forming step of forming a storage recess in a main surface of a base member, a component storage step of storing a component in the storage recess, and an opening edge of the storage recess formed into the storage recess. and a deformation step of plastically deforming so as to protrude inside.

According to the present invention, since the opening of the storage recess is narrowed by plastic deformation of the opening edge of the storage recess in the deformation process, the part can be fitted by a method such as loose fitting that does not apply an excessive load to the base member and the part in the component storage process. can do. Since the opening edge of the storage recess is plastically deformed to bring the side surface of the storage recess into contact with the component, the component stored in the storage recess can be held so as not to fall off. As a result, chipping and burrs of the base member and parts that may occur when the part is press-fitted into the recess can be suppressed, and the part can be held in the recess regardless of the material of the part. Therefore, it is possible to manufacture a base member unit that suppresses the generation of foreign matter that accompanies the assembly of parts to the base member.

The method for manufacturing the base member unit described above further includes a protrusion forming step of forming a protrusion around the opening edge of the storage recess on the main surface, and in the deforming step, the protrusion is crushed. good.

According to the present invention, by crushing the protrusion in the deformation step, the base portion of the protrusion can be plastically deformed so as to escape to the inside of the accommodation recess. Therefore, it is possible to provide a method for manufacturing a base member unit that exhibits the above-described effects.

In the method of manufacturing the base member unit described above, the convex portion forming step may form the convex portion by half-blanking.

According to the present invention, productivity can be improved compared to the case of forming convex portions by a processing method other than half-blanking (pressing) such as cutting.

In the base member unit manufacturing method described above, the deforming step may compress the convex portion on a flat surface perpendicular to the thickness direction of the base member.

According to the present invention, it is possible to compress the protrusion in the thickness direction of the base member while suppressing escape of the tip portion of the protrusion. As a result, the base portion of the protrusion can be reliably plastically deformed so as to escape to the inside of the accommodation recess.

In the manufacturing method of the base member unit described above, the deforming step may compress the convex portion with an inclined surface facing the inner side of the accommodating concave portion with respect to the thickness direction of the base member.

According to the present invention, when compressing the protrusion, the protrusion can be pressed toward the inside of the accommodation recess. As a result, compared to the case where the protrusion is compressed on a flat surface orthogonal to the thickness direction, it is possible to reliably plastically deform a larger portion of the root portion of the protrusion so as to escape to the inside of the accommodation recess. . Therefore, the plastically deformed portion can be brought into contact with the part with a higher pressure to increase the holding force of the part.

In the manufacturing method of the base member unit described above, in the deforming step, a periphery of the opening edge of the accommodation recess on the main surface may be pressed by a projection.

According to the present invention, when the projection enters, the portion of the base member located closer to the opening edge side of the storage recess than the projection can be pushed away toward the storage recess. Thereby, the opening edge of the storage recess can be plastically deformed so as to protrude inside the storage recess. Therefore, it is possible to provide a method for manufacturing a base member unit that exhibits the above-described effects.

According to the present invention, it is possible to provide a base member, a timepiece movement, a timepiece, a base member unit, and a method of manufacturing a base member unit that can easily hold parts made of various materials while suppressing the generation of foreign matter.

4 is a cross-sectional view showing the base member unit of the first embodiment; FIG. 4 is a flow chart showing a method for manufacturing the base member unit of the first embodiment; It is a figure explaining each process in the manufacturing method of the base member unit of 1st Embodiment. It is a figure explaining each process in the manufacturing method of the base member unit of 1st Embodiment. It is a figure explaining each process in the manufacturing method of the base member unit of 1st Embodiment. It is a figure explaining each process in the manufacturing method of the base member unit of 1st Embodiment. FIG. 4 is a cross-sectional view showing an example of a cross-sectional state of a base plate before a deformation process; FIG. 4 is a cross-sectional view showing an example of a cross-sectional state of the base plate after the deformation process; It is a figure explaining the manufacturing method of the base member unit of 2nd Embodiment. It is a figure explaining the manufacturing method of the base member unit of 3rd Embodiment. FIG. 11 is a cross-sectional view showing a base member unit of a fourth embodiment; It is a figure explaining the manufacturing method of the base member unit of 4th Embodiment. It is a figure explaining the manufacturing method of the base member unit of 4th Embodiment. It is a figure explaining the manufacturing method of the base member unit of 4th Embodiment. It is a figure explaining the manufacturing method of the base member unit of 4th Embodiment. FIG. 11 is a cross-sectional view showing a base member unit of a fifth embodiment; It is a figure explaining the manufacturing method of the base member unit of 5th Embodiment. It is a figure explaining the manufacturing method of the base member unit of 5th Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals are given to components having the same or similar functions. Duplicate descriptions of these configurations may be omitted.

[First embodiment]
(Configuration of base member unit)
A configuration of the base member unit 1 of the first embodiment will be described with reference to FIG.
FIG. 1 is a cross-sectional view showing the base member unit of the first embodiment.
In this embodiment, the base member unit 1 is a component for a watch and is part of a watch movement. The base member unit 1 rotatably supports the shaft of a rotating body such as a gear. As shown in FIG. 1, the base member unit 1 includes a base plate 10 (base member) and a bearing 40 (component). That is, the base member unit 1 has the bearing 40 attached to the base plate 10 .

The base plate 10 holds the bearings 40 . The base plate 10 is a plate material having a thickness in a predetermined direction. Hereinafter, the predetermined direction will be referred to as the thickness direction. The base plate 10 is made of a metal material. The ground plate 10 has a first main surface 11 (main surface) facing a first direction in the thickness direction, and a second main surface 12 facing a second direction opposite to the first direction. Further, the base plate 10 includes a storage recess 20 in which the bearing 40 is stored, a hole portion 14 formed on the side opposite to the storage recess 20, a plastically deformed portion 30 formed at the opening edge 21 of the storage recess 20, Prepare.

The storage recess 20 opens to the first main surface 11 of the base plate 10 . The storage recess 20 is formed in a circular cross section when viewed in the thickness direction. The storage recess 20 has side surfaces 22 and a bottom surface 23 . The bottom surface 23 extends inward from the lower edge of the side surface 22 over the entire circumference. The bottom surface 23 extends in a direction orthogonal to the thickness direction and faces the opening side (first direction) of the storage recess 20 . A through hole 13 is opened in the center of the bottom surface 23 so as to pass through the base plate 10 in the thickness direction. That is, the bottom surface 23 is formed in an annular shape.

The hole 14 opens in the second main surface 12 of the base plate 10 . The hole 14 does not pass through the base plate 10 . The hole portion 14 is formed in a circular shape when viewed from the thickness direction. The hole 14 is formed coaxially with the storage recess 20 . The hole 14 has an inner diameter larger than the inner diameter of the storage recess 20 . A through hole 13 is opened in the center of the bottom surface of the hole portion 14 .

Here, the bearing 40 will be described prior to the description of the plastic deformation portion 30 . The bearing 40 is a so-called hole stone that functions as a sliding bearing. The bearing 40 is formed in a cylindrical shape. For example, the bearing 40 is made of an artificial gem such as ruby. The axial edge of the outer peripheral surface 41 of the bearing 40 is chamfered over the entire circumference. However, the bearing 40 does not have to be chamfered. The bearing 40 is housed in the housing recess 20 with its axial direction along the thickness direction. The bearing 40 contacts the bottom surface 23 of the storage recess 20 and is supported by the base plate 10 from the second main surface 12 side.

The plastic deformation portion 30 is formed at least at the opening edge 21 of the storage recess 20 . The plastic deformation portion 30 is a portion of the side surface 22 of the storage recess 20 that includes the opening edge 21 and spreads in the thickness direction. The plastically deformed portion 30 is formed by plastically deforming the base plate 10 . The plastically deformable portion 30 is formed so as to protrude inside the storage recess 20 . The plastic deformation portion 30 is rotationally symmetrical with respect to the center of the storage recess 20 when viewed in the thickness direction. The plastically deformable portion 30 is continuously provided along the entire periphery of the opening edge 21 of the storage recess 20 . The plastic deformation portion 30 is in contact with the outer peripheral surface 41 of the bearing 40 . A portion of the side surface 22 of the housing recess 20 other than the plastic deformation portion 30 is not in contact with the outer peripheral surface 41 of the bearing 40 . The plastic deformation portion 30 is in contact with the edge (chamfered portion) of the outer peripheral surface 41 of the bearing 40 from the outside (first direction) in the thickness direction. The plastic deformation portion 30 prevents the bearing 40 from falling out of the storage recess 20 and holds the bearing 40 in the storage recess 20 .

(Manufacturing method of base member unit)
A method of manufacturing the base member unit 1 of the first embodiment will be described with reference to FIGS. 2 to 6. FIG.
FIG. 2 is a flow chart showing the manufacturing method of the base member unit of the first embodiment. 3 to 6 are diagrams for explaining each step in the manufacturing method of the base member unit of the first embodiment.

As shown in FIG. 2, the manufacturing method of the present embodiment includes a concave portion forming step S10, a convex portion forming step S20, a bearing housing step S30 (component housing step), and a deforming step S40. As shown in FIG. 3, in this embodiment, as the material of the base plate 10, a metal plate 50 that has been formed into roughly the outer shape of the base plate 10 by pressing, cutting, or the like is used. In addition, in the following description, one main surface of the metal plate 50 is called an upper surface 51 and the other main surface is called a lower surface 52 .

First, the recess forming step S10 is performed. As shown in FIG. 3, in the recess forming step S10, the metal plate 50 is formed with the through holes 13 and the storage recesses 20 . The through-holes 13 are formed by pressing, cutting, or the like. The through-holes 13 may be formed at the same time when the metal plate 50 is externally formed. The storage recess 20 is formed, for example, by press working. Specifically, in the step of forming the storage recess 20 , while supporting the lower surface 52 of the metal plate 50 on the flat surface of the die 60 , the periphery of the through hole 13 on the upper surface 51 of the metal plate 50 is removed from the side opposite to the die 60 . Punch 61 on . At this time, the die 60 supports at least the periphery of the through hole 13 on the lower surface 52 of the metal plate 50 . Also, the lowering distance of the punch 61 is set so that the punch 61 does not penetrate the metal plate 50 .

Here, the punch 61 has an outer diameter larger than the inner diameter of the through hole 13 . As a result, in the recess forming step S10, the storage recess 20 that opens to the upper surface 51 of the metal plate 50 is formed. At this point, the side surface of the storage recess 20 extends in the thickness direction of the metal plate 50 with a constant curvature. The opening of the storage recess 20 is formed larger than the bearing 40 . That is, the inner diameter of the storage recess 20 is larger than the outer diameter of the bearing 40 . As a result, the bearing 40 can be loosely fitted into the housing recess 20 . However, the inner diameter of the storage recess 20 may substantially match the outer diameter of the bearing 40 .

Subsequently, a projection forming step S20 is performed. As shown in FIG. 4 , in the protrusion forming step S20 , protrusions 53 are formed around the storage recesses 20 on the upper surface 51 of the metal plate 50 . In the projection forming step S20, the metal plate 50 is half-blanked (embossed). Specifically, in the convex portion forming step S20, while the upper surface 51 of the metal plate 50 is supported by the die 62, a punch 63 is applied to the peripheral edge portion of the through hole 13 in the lower surface 52 of the metal plate 50 from the side opposite to the die 62. . Here, the punch 63 has an outer diameter larger than the inner diameter of the storage recess 20 . The die 62 is formed with a die recess 62 a that avoids the opening edge 21 of the housing recess 20 . The die recess 62 a has an inner diameter larger than the inner diameter of the opening edge 21 of the storage recess 20 . The opening edge of the die recess 62a is located outside the opening edge 21 of the storage recess 20 over the entire circumference. For example, the inner diameter of the die concave portion 62a matches the outer diameter of the tip end surface of the punch 63 . In this case, the opening edge of the die recess 62 a coincides with the outer peripheral edge of the tip surface of the punch 63 when viewed from the thickness direction of the metal plate 50 .

By performing half blanking using the die 62 and the punch 63, the hole 14 is formed in the lower surface 52 of the metal plate 50, and the bottom surface 23 of the storage recess 20 approaches the upper surface 51 of the metal plate 50. Thus, the peripheral portion of the storage recess 20 in the metal plate 50 is displaced. As a result, an annular projection 53 is formed around the housing recess 20 on the upper surface 51 of the metal plate 50 . As described above, the main plate 10 is completed before the bearings 40 are attached. The upper surface 51 of the metal plate 50 becomes the first major surface 11 of the base plate 10 . A lower surface 52 of the metal plate 50 serves as the second main surface 12 of the base plate 10 . However, the projections 53 may not extend annularly, and may be intermittently formed around the storage recess 20, for example.

In the above-described example, the outer diameter of the convex portion 53 is formed smaller than the outer diameter of the punch 63, but is not limited to this. It may be formed larger than the outer diameter of the punch 63 . In this case, the inner diameter of the die recess 62 a is substantially the same as the outer diameter of the punch 63 or larger than the outer diameter of the punch 63 .

Subsequently, the bearing housing step S30 is performed. In the bearing housing step S<b>30 , the bearing 40 is housed in the housing recess 20 . The entire bearing 40 is arranged in the housing recess 20 . That is, the depth of the storage recess 20 is set so that the entire bearing 40 is arranged in the storage recess 20 . The bearing 40 is loosely fitted (fitted with a clearance) in the storage recess 20 and is movable with respect to the base plate 10 . However, when the inner diameter of the housing recess 20 substantially matches the outer diameter of the bearing 40, the bearing 40 may be fitted in the bearing housing step S30 in a manner that does not apply an excessive load to the main plate 10 and the bearing 40. For example, the bearing 40 may be fitted into the housing recess 20 with an interference of 0 or less.

Subsequently, a deformation step S40 is performed. As shown in FIG. 5, in the deformation step S40, the punch 64 is used to press the convex portion 53 toward the second main surface 12 side of the base plate 10. As shown in FIG. The punch 64 compresses the convex portion 53 with a flat surface 65 orthogonal to the thickness direction. For example, in the deformation step S40, the opening edge 21 of the storage recess 20 is pressed so as to be flush with the periphery.

As shown in FIG. 6 , when the projection 53 is crushed around the opening edge 21 of the storage recess 20 , the opening side edge 24 (deformable portion) of the side surface 22 of the storage recess 20 including the opening edge 21 is deformed. is plastically deformed. At this time, the opening-side end portion 24 is plastically deformed so as to protrude inside the storage recess 20 to fill the gap between the base plate 10 and the bearing 40 . The opening-side end portion 24 becomes a plastic deformation portion 30 . The opening-side end 24 comes into contact with the outer peripheral surface 41 of the bearing 40 in the process of protruding inside the storage recess 20 . Since the convex portion 53 is formed rotationally symmetrical with respect to the center of the storage recess 20 when viewed from the thickness direction, the plastic deformation portion 30 is also formed rotationally symmetrical with respect to the center of the storage recess 20 when viewed from the thickness direction. be done. As a result, the bearing 40 is centered with respect to the housing recess 20 .

As described above, the base member unit 1 is completed in which the bearing 40 is held in the storage recess 20 in a state in which the bearing 40 is prevented from falling out of the storage recess 20 .

FIG. 7 is a cross-sectional view showing an example of a cross-sectional state of the main plate before the deformation process. FIG. 8 is a cross-sectional view showing an example of the cross-sectional state of the main plate after the deformation process. In FIGS. 7 and 8, the composition of the base plate 10 is modeled using a mesh. As shown in FIGS. A side wall portion of the recess 20 is plastically deformed in a region from the protrusion 53 toward the second main surface 12 of the base plate 10 , and the opening edge 21 of the storage recess 20 is displaced inside the storage recess 20 . In FIG. 8, such plastic deformation is modeled and displayed by shortening the distance between meshes. That is, the portion of the main plate 10 where the mesh has moved from the state shown in FIG. 7 to the state shown in FIG. 8 is the portion that has undergone plastic deformation.

As described above, the main plate 10 of the present embodiment includes the storage recess 20 in which the bearing 40 is stored, and the storage recess that is plastically deformed so as to protrude inside the storage recess 20 at the opening edge 21 of the storage recess 20. and an open end 24 of the side 22 of 20 . According to this configuration, the opening of the storage recess 20 can be narrowed by plastic deformation of the opening-side end portion 24 of the side surface 22 of the storage recess 20. Therefore, when the bearing 40 is stored in the storage recess 20, loose fitting or the like can be performed. The bearings 40 can be fitted in such a way that the base plate 10 and the bearings 40 are not overstressed. As a result, it is possible to hold the bearing 40 in the housing recess 20 regardless of its material, while suppressing chipping and burrs of the base plate and the bearing that may occur when the bearing is press-fitted into the housing recess. Therefore, it is possible to obtain the base plate 10 that can easily hold the bearings 40 made of various materials while suppressing the generation of foreign matter. Further, in the base member unit 1, the plastically deformed portion 30 plastically deformed at the opening edge 21 of the storage recess 20 contacts the bearing 40, so that the bearing 40 stored in the storage recess 20 can be held so as not to fall off. Therefore, it is possible to obtain the base member unit 1 in which the generation of foreign matter due to the assembly of the bearing 40 to the base plate 10 is suppressed. In addition, since the dimensional tolerance of the housing recess 20 can be loosened compared to the structure in which the bearing is press-fitted into the housing recess, the yield in forming the base plate 10 can be improved.

Moreover, the member accommodated in the accommodation recess 20 is the bearing 40 . According to this configuration, it is possible to suppress brittle fracture of the bearing that may occur when the bearing is press-fitted. Therefore, the yield of holding the bearing 40 on the base plate 10 can be improved.

The base plate 10 further includes a protrusion 53 formed around the opening edge 21 of the storage recess 20 . According to this configuration, by crushing the protrusion 53 , the root portion of the protrusion 53 can be plastically deformed so as to escape to the inside of the storage recess 20 . Therefore, the base plate 10 and the base member unit 1 that exhibit the effects described above can be obtained.

The storage recess 20 has a bottom surface 23 facing the opening side of the storage recess 20 . According to this configuration, the bearing 40 can be positioned in the depth direction of the storage recess 20 by bringing the bearing 40 into contact with the bottom surface 23 of the storage recess 20 . Therefore, the bearing 40 can be placed at a desired position on the base plate 10 with high accuracy.

In addition, the timepiece movement provided with the main plate 10 can prevent the timepiece from malfunctioning due to foreign matter generated from the main plate 10 or the bearings 40 . Therefore, the reliability of the timepiece can be improved.

Further, in the method for manufacturing the base member unit 1 of the present embodiment, the convex portion 53 is formed by half-blanking in the convex portion forming step S20. According to this configuration, productivity can be improved as compared with the case where the convex portion 53 is formed by a processing method other than half-blanking (pressing) such as cutting.

Furthermore, in the deformation step S40, the convex portion 53 is compressed by the flat surface 65 orthogonal to the thickness direction. According to this method, it is possible to compress the protrusion 53 in the thickness direction while suppressing escape of the tip portion of the protrusion 53 . As a result, the root portion of the protrusion 53 can be reliably plastically deformed so as to escape to the inside of the accommodation recess 20 .

Further, by appropriately setting the downward distance of the punch 64 in the deformation step S40, the pressure of the plastic deformation portion 30 that contacts the bearing 40 can be adjusted. Therefore, it is possible to reliably hold the bearing 40 in the housing recess 20 while suppressing excessive load from being applied to the bearing 40 .

[Second embodiment]
(Manufacturing method of base member unit)
A method for manufacturing the base member unit of the second embodiment will be described with reference to FIG.
9A and 9B are diagrams illustrating a method for manufacturing the base member unit of the second embodiment.
As shown in FIG. 9, the second embodiment is different from the first embodiment in that a punch 64A is used instead of the punch 64 of the first embodiment in the deformation step S40 to crush the convex portion 53 in the compression direction. is different. Configurations other than those described below are the same as those of the first embodiment.

The punch 64A has an inclined surface 66 on its tip surface. The inclined surface 66 is formed at a position facing the convex portion 53 in the thickness direction. The inclined surface 66 is formed in an annular shape corresponding to the shape of the convex portion 53 . The inclined surface 66 faces the inner side of the storage recess 20 with respect to the thickness direction. By compressing the convex portion 53 with the inclined surface 66 of the punch 64A, the convex portion 53 is pressed to the inside of the storage recess 20, and the opening side end 24 of the side surface 22 of the storage recess 20 protrudes inside the storage recess 20. It is plastically deformed. Thereby, the plastically deformed portion 30 is formed.

As described above, in the deformation step S40 of the present embodiment, the convex portion 53 is compressed by the inclined surface 66 facing toward the inside of the storage concave portion 20 with respect to the thickness direction. According to this method, the protrusion 53 can be pressed inside the storage recess 20 when the protrusion 53 is compressed. As a result, compared to the case where the projection 53 is compressed on a flat surface orthogonal to the thickness direction, the root portion of the projection 53 is reliably plastically deformed so as to escape to the inside of the storage recess 20. be able to. Therefore, the plastically deformed portion 30 can be brought into contact with the bearing 40 with a higher pressure, and the holding force of the bearing 40 can be increased.

[Third Embodiment]
(Manufacturing method of base member unit)
A method of manufacturing the base member unit of the third embodiment will be described with reference to FIG.
10A and 10B are diagrams illustrating a method for manufacturing the base member unit of the third embodiment.
As shown in FIG. 10, the third embodiment is different from the first embodiment in that the convex portion 53A to be compressed in the deformation step S40 is provided with a gap from the opening edge 21 of the accommodation concave portion 20. different. In this embodiment, the protrusion forming step S20 of the first embodiment is omitted, and the protrusion 53A is formed by forging or cutting a metal plate at least before the bearing housing step S30.

According to the present embodiment, by compressing the convex portion 53A so as to crush it, the root portion of the convex portion 53A can be plastically deformed so as to escape to the inside of the storage concave portion 20 . Therefore, it is possible to obtain the base plate 10 that exhibits the same effects as those of the first embodiment.

[Fourth Embodiment]
(Configuration of base member unit)
A configuration of the base member unit of the fourth embodiment will be described with reference to FIG. 11 .
FIG. 11 is a cross-sectional view showing the base member unit of the fourth embodiment.
As shown in FIG. 11, the fourth embodiment differs from the first embodiment in that the bearing 40 is supported by the side surface 122 of the housing recess 120 which gradually decreases in diameter toward the bottom side. Configurations other than those described below are the same as those of the first embodiment.

The base plate 110 includes a storage recess 120 and a plastically deformable portion 30 . The storage recess 120 opens to the first main surface 111 of the base plate 110 . The storage recess 120 is formed in a circular cross section when viewed in the thickness direction. The storage recess 120 has sides 122 . The side surface 122 is formed around a predetermined axis extending in the thickness direction. A plastic deformation portion 30 is formed on the side surface 122 . A portion of the side surface 122 that is located on the second main surface 112 side with respect to the plastic deformation portion 30 faces a direction that is inclined toward the opening side of the storage recess 120 with respect to the direction perpendicular to the thickness direction. In this embodiment, the storage recess 120 penetrates the base plate 110, but the storage recess may have a bottom surface without penetrating the base plate. Furthermore, a through hole may be opened in the bottom surface of the storage recess.

The bearing 40 is housed in the housing recess 120 . The bearing 40 contacts a portion of the side surface 122 of the storage recess 120 that faces the opening side of the storage recess 120 and is supported by the base plate 110 from the second main surface 112 side. An outer peripheral surface 41 of the bearing 40 is in contact with the plastic deformation portion 30 . The plastic deformation portion 30 is in contact with the edge of the outer peripheral surface 41 of the bearing 40 from the outside in the thickness direction. The bearing 40 is held in the storage recess 120 in a state in which it is prevented from falling out of the storage recess 120 .

(Manufacturing method of base member unit)
A method for manufacturing the base member unit 101 of the fourth embodiment will be described.
12 to 15 are diagrams for explaining the manufacturing method of the base member unit of the fourth embodiment.
As shown in FIG. 12, in the recess forming step S10, the housing recess 120 is formed in the upper surface 51 of the metal plate 50. As shown in FIG. At this point, the side surface 122 of the storage recess 120 is gradually reduced in diameter from the opening edge 121 toward the bottom side. The storage recess 120 is formed by press working, for example. Note that the storage recess 120 may be formed by cutting the side surface of a previously formed through hole. The inner diameter of the opening edge 121 of the storage recess 120 on the upper surface 51 of the metal plate 50 is larger than the outer diameter of the bearing 40 . It should be noted that the storage recess 120 may be formed at the same time as the metal plate 50 is formed.

Subsequently, a projection forming step S20 shown in FIG. 13, a bearing housing step S30 shown in FIG. 14, and a deformation step S40 shown in FIG. 14 are performed. These projection forming step S20, bearing housing step S30, and deformation step S40 are the same as in the first embodiment. That is, by crushing the convex portion 53, the opening side end portion 124 of the storage recess 120 is plastically deformed so as to protrude inside the storage recess 120, and contacts the outer peripheral surface 41 of the bearing 40 stored in the storage recess 120. Let As described above, the base member unit 101 is formed in which the bearing 40 is held in the storage recess 120 in a state in which the bearing 40 is prevented from falling out of the storage recess 120 .

As described above, the storage recess 120 of this embodiment has the side surface 122 that faces in a direction that is inclined toward the opening side of the storage recess 120 . According to this configuration, the bearing 40 can be positioned in the depth direction of the storage recess 120 by bringing the bearing 40 into contact with the side surface 122 of the storage recess 120 . Therefore, the bearing 40 can be placed at a desired position on the base plate 110 with high accuracy.

[Fifth embodiment]
(Configuration of base member unit)
A configuration of the base member unit of the fifth embodiment will be described with reference to FIG.
FIG. 16 is a cross-sectional view showing the base member unit of the fifth embodiment.
As shown in FIG. 16, the fifth embodiment differs from the first embodiment in that a recess 16 is formed outside the opening edge 21 of the storage recess 20 on the first main surface 11 of the base plate 10 . Configurations other than those described below are the same as those of the first embodiment.

A depression 16 is formed in the first main surface 11 of the base plate 10 . The recess 16 is formed around the storage recess 20 . The depression 16 is formed with a gap from the opening edge 21 of the storage recess 20 . The recess 16 extends in an annular shape substantially concentrically with the storage recess 20 when viewed from the thickness direction. However, the recesses 16 may not extend annularly, and may be intermittently formed around the storage recesses 20, for example.

The plastically deformable portion 30 is formed in a portion of the opening edge 21 of the storage recess 20 that is located at the shortest distance from each portion of the recess 16 . In this embodiment, since the recess 16 is formed in an annular shape, the plastically deformable portion 30 is provided continuously over the entire periphery of the opening edge 21 of the storage recess 20 in this embodiment.

(Manufacturing method of base member unit)
A method of manufacturing the base member unit of the fifth embodiment will be described with reference to FIGS. 17 and 18. FIG.
17 and 18 are diagrams for explaining the manufacturing method of the base member unit of the fifth embodiment.
In this embodiment, the projection forming step S20 of the first embodiment is omitted. As shown in FIG. 17, in the deformation step S40, a punch 67 is applied to the first main surface 11 of the base plate 10 on which the projections 53 of the above embodiments are not formed. A sharpened protrusion 68 extending in an annular shape is formed on the tip surface of the punch 67 . The projection 68 is pressed outside the storage recess 20 on the first main surface 11 of the base plate 10 so as to surround the opening of the storage recess 20 . When the protrusion 68 is pressed against the first main surface 11 of the base plate 10 , the recess 16 is formed in the base plate 10 , and the part of the base plate 10 pushed away by the protrusion 68 is plastically deformed in the direction away from the protrusion 68 . As a result, as shown in FIG. 18 , the portion of the base plate 10 located between the depression 16 and the side surface 22 of the storage recess 20 is deformed so as to protrude inward of the storage recess 20 . A plastically deformed portion 30 is formed on the side surface 22 .

As described above, in the deformation step S40 of the present embodiment, the projection 68 presses the periphery of the opening edge 21 of the storage recess 20 on the first main surface 11 of the base plate 10 . According to this method, the portion of the base plate 10 positioned closer to the opening edge 21 side of the storage recess 20 than the protrusion 68 can be pushed away toward the storage recess 20 by the protrusion 68 entering. Thereby, the opening edge 21 of the storage recess 20 can be plastically deformed so as to protrude inside the storage recess 20 . Therefore, it is possible to manufacture the base member unit 201 that exhibits the above-described effects.

It should be noted that the present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications are conceivable within its technical scope.
For example, in the above embodiments, the present invention is applied to the main plate of the timepiece movement, but the present invention may also be applied to a bearing member such as a train wheel bridge. Furthermore, the scope of application of the present invention is not limited to parts for watches, and the present invention can be applied to various products.

Further, in the above embodiments, the base plate is made of a metal material, but the material of the base plate is not limited to this. For example, the base plate may be made of a resin material.

In addition, in the above embodiment, the storage recess is formed in a circular shape in plan view, but the shape of the storage recess is not limited to this. For example, the storage recess may be formed in a polygonal shape in plan view.

In the above embodiment, the plastic deformation portion 30 is in contact with the axial edge of the outer peripheral surface 41 of the bearing 40 from the outside in the thickness direction, but the present invention is not limited to this configuration. The plastically deformed portion contacts the outer peripheral surface 41 of the bearing 40 only from the radially outer side, and the bearing 40 is held in the storage recess only by the frictional force between the side surface of the storage recess and the outer peripheral surface 41 of the bearing 40. good too.

Moreover, in the above-described embodiment, the base member unit is formed by assembling the bearing to the base plate, but the structure is not limited to this. For example, in a configuration in which a rod-shaped member (shaft member) is assembled to the base plate, the shaft member may be fixed to the base plate by bringing the plastically deformed portion into contact with the outer peripheral surface of the rod-shaped member inserted into the housing recess.

Further, in the above embodiment, the first main surface of the base plate is formed flat by pressing the base plate in the deformation step. may

In addition, it is possible to appropriately replace the components in the above-described embodiments with well-known components without departing from the scope of the present invention, and the above-described embodiments may be combined as appropriate.

Reference Signs List 1, 101, 201 Base member unit 10, 110 Base plate (base member) 11, 111 First main surface (main surface) 20, 120 Storage recess 21, 121 Opening edge 22, 122 Side surface 23 Bottom surface 24... Opening side end (part to be deformed) 30... Plastic deformation part 40... Bearing (component) 53, 53A... Convex part 65... Flat surface 66... Inclined surface 68... Protrusion S10... Concave part forming process S20... Convex part forming process S30: Bearing housing process (parts housing process) S40: Deformation process

Claims (15)

a main surface;
a storage recess that is open to the main surface and stores a component;
a deformable portion that is plastically deformed so as to protrude inside the storage recess at the opening edge of the storage recess;
A base member comprising: the component is a bearing;
A base member according to claim 1 . Further comprising a protrusion formed around the opening edge of the storage recess on the main surface,
The base member according to claim 1 or 2. The storage recess has a bottom surface facing the opening side of the storage recess,
The base member according to any one of claims 1 to 3. The storage recess has a side surface that faces an inclined direction toward the opening side of the storage recess,
The base member according to any one of claims 1 to 3. Either the main plate or the support member of a watch movement,
The base member according to any one of claims 1 to 5. A timepiece movement comprising the base member according to any one of claims 1 to 6. A timepiece comprising the timepiece movement according to claim 7. parts and
a base member that holds the component;
with
The base member is
a main surface;
a storage recess that is open to the main surface and stores the component;
a plastically deformed portion that is plastically deformed at an opening edge of the storage recess, protrudes inside the storage recess, and is in contact with the component;
comprising
base unit. a recess forming step of forming a storage recess in the main surface of the base member;
a component housing step of housing the component in the housing recess;
a deformation step of plastically deforming the opening edge of the storage recess so as to protrude inside the storage recess;
A method of manufacturing a base member unit comprising: further comprising a protrusion forming step of forming a protrusion around the opening edge of the storage recess on the main surface;
In the deforming step, the convex portion is crushed,
A method of manufacturing a base member unit according to claim 10 . In the step of forming the convex portion, the convex portion is formed by half-blanking.
A method of manufacturing a base member unit according to claim 11 . In the deforming step, the convex portion is compressed on a flat surface perpendicular to the thickness direction of the base member.
The manufacturing method of the base member unit according to claim 11 or 12. In the deforming step, the convex portion is compressed with an inclined surface facing the inside of the accommodating concave portion with respect to the thickness direction of the base member.
The manufacturing method of the base member unit according to claim 11 or 12. The deforming step presses a periphery of the opening edge of the storage recess on the main surface with a projection.
A method of manufacturing a base member unit according to claim 10 .

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