Housing device, timepiece, and method for manufacturing housing device

Abstract

A case device is provided with: an inner case; a housing; a plating film which is formed on an appearance part which can be visually confirmed from the outside in the surface of the housing; and a cover member, the outer shell is made of a second material which is a material to be plated capable of forming the plating film, the inner shell is made of a first material which is a material to be non-plated in which the plating film is more difficult to form than the second material, and the inner shell is covered by the outer shell and the cover member.

Description

Technical Field

[0001] The present invention relates to a housing device, a timepiece, and a method for manufacturing the housing device. Background Art

[0002] Japanese Patent Application Publication No. 2015-64287 describes a decorative ring comprising: a translucent frame formed of a non-plating material that is difficult to form a plating film on; a metal-like forming portion formed of a plating material that can form a plating film; and a plating layer formed in the metal-like forming portion as an externally visible appearance portion.

[0003] However, the translucent frame disclosed in Japanese Patent Application Laid-Open No. 2015-64287 has a portion of its surface covered by a metal-like structure formed with a plating layer, but also has an area not covered by any component. Therefore, the translucent frame can be visually recognized from the outside, thus causing a problem of reduced appearance.

[0004] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a housing device, a timepiece, and a method for manufacturing the housing device, which can improve the appearance. Summary of the Invention

[0005] Solutions to Problems

[0006] A housing device according to one embodiment of the present invention comprises: an inner shell; an outer shell; a plating film, which is an appearance portion formed on the surface of the outer shell and can be visually confirmed from the outside; and a cover component, wherein the outer shell is composed of a second material that is a plating object material that can form the plating film, the inner shell is composed of a first material that is a non-plating object material that is difficult to form the plating film than the second material, and the inner shell is covered by the outer shell and the cover component.

[0007] Effects of the Invention

[0008] According to the present invention, it is possible to provide a housing device, a timepiece, and a method for manufacturing a housing device that can improve the appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a plan view showing the structure of the timepiece according to the first embodiment.

[0010] Figure 2 It is a cross-sectional view showing the structure of the timepiece.

[0011] Figure 3 It is a cross-sectional view showing the structure of the watch case.

[0012] Figure 4 This is a perspective view showing the case structure of the watch case as viewed from the front side.

[0013] Figure 5 This is a perspective view showing the case structure of the watch case as viewed from the back side.

[0014] Figure 6 It is a cross-sectional view showing the structure of a timepiece according to the second embodiment.

[0015] Figure 7 It is a plan view showing the case structure of the watch case.

[0016] Figure 8 It is a cross-sectional view showing the structure of the housing. DETAILED DESCRIPTION

[0017] [First embodiment]

[0018] Below, refer to Figures 1 to 5 , the structure of the watch 1 and the watch case 10 as a casing device involved in the first embodiment of the present invention will be described. For example, with respect to the watch 1, the side in one direction and the side to which the outer surface of the windproof component 40 faces is referred to as the front side, and the side in the other direction and the side to which the surface of the back cover 12 faces is referred to as the back side. For example, the watch 1 is in a posture with the outer surface of the back side facing the wrist of the wearer. In the figure, X, Y, and Z respectively represent three mutually orthogonal directions. For example, in this embodiment, with respect to the watch 1, the posture is described as an example along the first direction of the Z axis along the front and back directions of the watch 1, the X axis along the horizontal direction connecting the 3 o'clock and 9 o'clock of the watch 1, and the Y axis along the vertical direction connecting the 6 o'clock and 12 o'clock of the watch 1, but the present invention is not limited to this. In addition, in each figure, the structure is appropriately enlarged, reduced, or omitted to show the general structure.

[0019] like Figures 1 to 3 As shown, the timepiece 1 is, for example, a wristwatch, and includes a watch case 10 (case device) constituting an outer shell, a watch module 30 disposed within the watch case 10, and a windshield member 40 (other components) serving as a cover member covering the front side of the watch module 30. Furthermore, the timepiece 1 includes a strap 50 having a band member 51 connected to two locations on the outer periphery of the watch case 10, and a plurality of buttons 60 arranged on the outer periphery of the watch case 10.

[0020] The watch case 10 includes a case 11 configured in a circular shape and arranged on the outer periphery of the watch module 30 , and a back cover 12 (other member) as a cover member arranged on the back side of the watch module 30 .

[0021] like Figure 4 and Figure 5As shown, the housing 11 is cylindrical. The housing 11 has a circular storage space 11a (storage portion) in the center for arranging the watch module 30. In one direction along the central axis of the circle, the housing 11 has a surface opening 11b on one side and a back opening 11c on the other side. Figure 1 as well as Figure 2 The watch module 30 shown. The surface opening 11b of the housing 11 is formed by Figure 1 and Figure 2 The rear opening 11c of the housing 11 is covered by the windproof member 40 shown. Figure 2 The back cover 12 shown covers the Figure 2 and Figure 3 As shown, an annular groove 21 is formed on the edge of the rear side of the housing 11 , and an O-ring 41 (a waterproof member) for waterproofing is mounted in the annular groove 21 to provide airtightness between the housing 11 and the rear cover 12 .

[0022] The annular groove 21 is formed over the entire circumference. It is a recessed portion formed on the back surface of the housing 11 that faces the rear cover 12 and is retreated toward the front side along a predetermined width of the periphery of the rear cover 12. Figure 3 As shown, the annular groove 21 includes a bottom portion 21 a that is recessed toward the front side relative to the rear surface of the housing 11 , an inner peripheral side wall 21 b , and an outer peripheral side wall 21 c .

[0023] The case 11 also includes protrusions 18 c (band attachment portions) at two locations on the outer periphery that face each other, for example, at 6 o'clock and 12 o'clock. Each protrusion 18 c has lug holes 18 e for attaching the watch band 50 .

[0024] The shell 11 is formed by two-color molding, and has an inner shell part 17 as a first shell part formed by a first material, an outer shell part 18 as a second shell part formed by a second material, and a plating film 19 formed on the surface of the outer shell part 18.

[0025] For example, the inner shell 17 is a non-exterior portion whose surface is covered by cover components such as the windshield 40 and the back cover 12 in the product state, and is not visually visible from the outside. It is made of a first resin material (first material). The first resin material is, for example, a non-plating material (non-plating target material) that is more difficult to form a plating film with respect to the target plating material than the second resin material. For example, the first resin material is made of polycarbonate (PC). In addition, in this embodiment, as described later, the plating film 19 has a base plating layer (first plating layer) based on non-electrolytic plating and a main plating layer (second plating layer) based on electrolytic plating. Therefore, for example, as the first resin material, a material that does not form a base plating layer with the target plating material is used.

[0026] As an example, in Figure 4 and Figure 5 , the inner shell 17 is indicated by hatching. The inner shell 17 includes, for example, a front wall portion 17a that is a portion of the front and outer periphery of the module 30, and a frame-shaped inner wall portion 17b that extends from the outer periphery of the front wall portion 17a to the rear side and is arranged to face the outer periphery of the module 30.

[0027] The outer shell 18 is formed by secondary molding of a second resin material (second material). The second resin material is a material that can be plated with the plating material forming the target plating film, and is, for example, made of ABS resin. As an example, in this embodiment, the outer shell 18 is formed of ABS resin. The outer shell 18 includes a frame-shaped outer wall portion 18a disposed on the outer periphery of the outer wall portion 17a and inner wall portion 17b of the inner shell portion 17; a cylindrical portion 18b, which serves as an extension and protrudes inward from the outer wall portion 18a; and a protrusion 18c, which protrudes outward from the outer wall portion 18a. For example, the outer shell 18 primarily serves as the exterior appearance visible from the outside of the product. In this embodiment, the exterior appearance is entirely comprised of the outer shell 18. However, portions of the outer shell 18 may be located in non-exterior areas. In other words, portions of the outer shell 18 may be covered by other components.

[0028] That is, for example, the cylindrical portion 18b as the extension portion in this embodiment extends from a predetermined portion of the outer wall portion 18a constituting the outer periphery of the housing 11 through the cylindrical opening portion 17c (see Figure 3 ) and protrudes inward, with the front end portion being formed to the inner surface of the housing 11. The outer peripheral surface of the cylindrical portion 18b is covered by the inner shell portion 17, and the front end surface constitutes a non-appearance portion arranged opposite to the module 30. In other words, the outer shell portion 18 may also constitute a part of the non-appearance portion. In the present embodiment, the cylindrical portion 18b is formed in a portion where the button 60 is arranged, and constitutes a hole portion for the button through which a part of the button 60 passes. In addition, the outer shell portion 18 may also constitute a portion of the non-appearance portion, such as a portion near the boundary between the appearance portion and the non-appearance portion.

[0029] The protrusions 18c are formed at, for example, the 6 o'clock and 12 o'clock positions of the watch. The protrusions 18c constitute the strap attachment portion for attaching the watch band 50. The protrusions 18c are formed with lug holes 18e, which are holes through which fastening members for connecting the strap member 51 pass.

[0030] The plating film 19 is a coating formed on the surface of the outer shell 18. For example, the plating film 19 is composed of gold (Au) or the like. For example, the plating film 19 may have a multilayer structure having a base plating layer formed by electroless plating and a main plating layer formed by electroplating. As an example, the plating film 19 has a base plating layer composed of nickel, copper, or the like by electroless plating and a main plating layer composed of gold, chromium, palladium, or the like.

[0031] The plating film 19 is formed mainly on the surface of the exterior portion. In the present embodiment, the exterior portion is entirely covered with the plating film 19. As an example, in the present embodiment, the plating film 19 is also formed on the front end surface of the cylindrical portion 18b, which is a non-exterior portion and is not covered by the inner shell portion 17. Alternatively, the plating film 19 may be formed in a non-exterior portion, such as near the boundary between the exterior portion and the non-exterior portion. Furthermore, the positions of the boundary between the non-exterior portion and the exterior portion and the boundary B between the inner shell portion 17 and the outer shell portion 18 may not necessarily coincide. For example, the boundary B may be located at the same position as the boundary between the non-exterior portion and the exterior portion, or in an area further inward of the boundary, i.e., on the non-exterior portion side.

[0032] The back cover 12 is a plate-shaped member that covers the back side of the case 11 and the timepiece module 30. For example, the back cover 12 is fastened at its outer periphery to the edge of the rear opening 11c of the case 11 using fasteners such as screws. The back cover 12 is a cover member that covers the surface of the inner housing 17 of the case 11. For example, the outer periphery of the back cover 12 is positioned opposite the outer periphery of the groove 21 where the O-ring 41 is located. That is, the back cover 12 is positioned on the back side of the case 11 so as to overlap with the outer periphery of the inner housing 17 or to the outside of the outer periphery. Alternatively, the outer periphery of the back cover 12 may partially or entirely face the outer housing 18. In other words, on the back side of the case 11, the boundary between the non-exterior portion covered by the back cover 12 and the exterior portion not covered by the back cover 12 may be aligned with or outside the boundary between the inner and exterior housings 17 and 18. Furthermore, the surface of the inner housing 17 of the case 11 does not necessarily need to be covered solely by the back cover 12. That is, the back cover 12 only needs to be a cover member that covers at least a portion of the surface of the inner case 17 of the housing 11. For example, the surface of the inner case 17 of the housing 11 may be covered by the back cover 12 and another member.

[0033] The watch module 30 includes a display unit that displays information such as the time and date, a movement that operates the display unit, a circuit board equipped with electronic components such as an IC and an antenna, a battery, and various other components necessary for watch functions. For example, the display unit may be a digital display unit such as a liquid crystal display panel with digital display capabilities, or an analog display unit including a dial and hands. Furthermore, multiple display units may be provided.

[0034] The windshield member 40 is a transparent member formed, for example, from an inorganic glass such as SiO2 glass. For example, the windshield member 40 is a transparent, plate-shaped watch glass, positioned on the front side of the watch module 30 and covering the watch module 30. For example, the windshield member 40 is supported on the inner periphery of the surface opening 11b of the housing 11. A pad is interposed between the outer periphery of the windshield member 40 and the inner periphery of the housing 11. Furthermore, the windshield member 40 may have an opaque portion, such as a printed layer or vapor-deposited portion, on a portion of its back surface. For example, the windshield member 40 may have an opaque portion in an area closer to the outer periphery than the dial display area. Therefore, the outer periphery of the windshield member 40 on the upper surface of the inner housing 17 is not covered by the outer housing 18, but the inner housing 17 cannot be visually identified from the outside. Alternatively, the windshield member 40 may not have an opaque portion. In this case, the outer periphery of the windshield member 40 is bonded to the upper surface of the inner housing 17 using a double-sided adhesive tape, such as black. In this way, the windproof component 40 has a colored area. The windproof component 40 is a cover component that covers the surface of at least a portion of the inner shell portion 17 of the shell 11. As an example, the position of the outer peripheral edge of the windproof component 40 is arranged at a position overlapping with the outer edge of the inner shell portion 17 on the surface of the shell 11, or at a position further outward than the outer edge of the inner shell portion 17. That is, at least a portion of the outer edge of the windproof component 40 may also be opposite to the outer shell portion 18. In other words, in this embodiment, on the surface side of the shell 11, the boundary between the non-appearance portion covered by the windproof component 40 and the appearance portion not covered by the windproof component 40 is arranged at the same position as the boundary B between the inner shell portion 17 and the secondary molded portion 18, or at a position further outward than the position of the boundary B.

[0035] The watch band 50 includes a pair of band members 51 connected to two opposing locations on the outer periphery of the watch case 10, and a fastening mechanism such as a buckle. The button 60 is provided, for example, on the outer periphery of the case and is pressed by the operator to switch the mode of the watch module 30, adjust the time, etc.

[0036] In the timepiece 1 constructed as described above, for example Figure 3 As shown, the area inside the portion of the surface of the shell 11 that overlaps with the windshield member 40 is composed of the inner shell portion 17. On the other hand, the area closer to the outer periphery than the portion that overlaps with the windshield member 40 is entirely composed of the outer shell portion 18. In addition, a portion of the area that overlaps with the outer edge of the windshield member 40 is composed of the outer shell portion 18.

[0037] In addition, if Figure 4 As shown, the inner circumference of the housing 11, the area inside the housing 11 covered by the rear cover 12, is composed of an inner shell portion 17. Furthermore, the peripheries of the two button holes 11e provided in the inner wall are composed of an outer shell portion 18. Meanwhile, the outer circumference of the portion overlapping the rear cover 12 is entirely composed of the outer shell portion 18. In other words, at least the portion viewed from the outside, i.e., the exterior portion, is entirely composed of the outer shell portion 18.

[0038] Furthermore, the bottom portion 21a of the annular groove 21 formed in the housing 11 is arranged so as to straddle a boundary B in the groove width direction, which is perpendicular to the circumferential direction and the forward and reverse directions, between the inner housing portion 17 and the outer housing portion 18. Specifically, the inner peripheral sidewall 21b of the annular groove 21 is arranged in the inner housing portion 17, while the outer peripheral sidewall 21c is formed in the outer housing portion 18.

[0039] The method for manufacturing the housing 11 according to this embodiment includes a primary molding step (first molding step) of forming the inner shell portion 17 from a first resin material, a secondary molding step (second molding step) of forming the outer shell portion 18 from a second resin material, and a plating step of performing an electroplating treatment.

[0040] In the primary molding process, a first resin material such as polycarbonate, which is a non-plated resin, is molded into a predetermined shape. Specifically, the first resin material is poured into the primary molding die and solidified to form a frame-shaped inner shell portion 17 as a primary molding product. In the secondary molding process, a second resin material such as ABS resin, which is a plating resin capable of forming a plating film, is molded into a predetermined shape. While the frame-shaped inner shell portion 17, which is a primary molding product, is set in the secondary molding die using the secondary molding die, the second resin material is supplied to the secondary molding die and solidified to form a cylindrical base material 110 (see FIG. 1 ) in which the inner shell portion 17 and the outer shell portion 18 are integrated. Figure 5 ).

[0041] Next, a plating process is performed to form a plated film on the surface of the cylindrical substrate 110, which is formed by integrating the inner shell 17 and the outer shell 18. First, as a pre-process, the substrate 110 is hooked on a jig and held, and then a palladium catalyst is adsorbed on the first material portion of the surface of the outer shell 18 by etching, followed by a catalyst treatment. After the metal film serving as the base is formed using the palladium catalyst as the core through electroless plating, an electroplating process is performed as the main process.

[0042] Next, as an electroplating treatment, rack plating is performed. For example, a substrate 110 and a metal to be formed into a film are arranged in a solution containing metal ions. At this time, the substrate 110 is held by pressing the energized arm of the clamp inward at multiple locations on the outer peripheral side of the substrate 110, for example, at four holding points P1. In addition, a negative electrode is connected to the metal for film formation, and a positive electrode is connected to the substrate 110, and a direct current flows. Due to a reduction reaction in the solution, metal is precipitated on the portion of the outer surface of the shell 18 of the substrate 110 where the base plating is formed, forming a plating film 19. In the plating process, the thickness can be controlled by the magnitude of the current and the energization time. For example, the thickness of the plating film 19 is about 30μm.

[0043] According to the watch case 10 and watch 1 constructed as described above, the case 11 is formed by two-color molding, which reduces thickness variations in the secondary molded portion. This reduces sink marks and shortens the molding cycle. In particular, when the surface is plated, sink marks and other irregularities can easily affect the appearance. However, by reducing the thickness of each molded portion 17 and 18, sink marks and other irregularities caused by shrinkage can be reduced.

[0044] Furthermore, the watch case 10 and the watch 1 according to the above embodiment can reduce the plating area and the amount of precious metal used for plating by forming a portion of the case 11 from a first material that is difficult to plate. Furthermore, since it is possible to define the portion to be plated by two-color molding, there is no need to mask the portion not to be plated or to dissolve the plating film of the unnecessary portion, making it easy to reduce the plating area even for complex shapes. Furthermore, in methods such as pre-masking the area not to be plated and dissolving the plating film of the unnecessary portion with a strong acid, it is difficult to select a masking agent that is not eroded by etching during the pre-plating treatment. However, according to the above embodiment, plating can be easily formed only on the necessary portion.

[0045] [Second embodiment]

[0046] Below, refer to Figures 6 to 8 The timepiece 1 and the timepiece case 10 according to the second embodiment will now be described. For example, in this embodiment, the outer shell 18 forms a portion of the inner wall of the case 11A, which serves as the electrical contact portion. The remaining structure is the same as that of the first embodiment. The case 11A according to this embodiment has the same structure as the case 11 shown in the first embodiment.

[0047] exist Figure 7 In the figure, the inner case 17 is shaded. The inner case 17 includes, for example, a front wall portion 17a disposed opposite the front side of the module 30 and an inner wall portion 17b disposed opposite the outer periphery of the module 30. In this embodiment, a portion of the circumference of the inner wall portion 17b is cut away. In other words, the inner wall portion 17b is formed into a frame shape with an opening 17d at a portion of the 6 o'clock side of the timepiece.

[0048] The outer shell 18 comprises a frame-shaped outer wall 18a disposed on the outer periphery of the outer wall 17a and inner wall 17b of the inner shell 17; and a widened portion 18d, a protrusion (extension) that partially bulges inward from the outer wall 18a. For example, the outer shell 18 primarily serves as the exterior design of the product. In this embodiment, the exterior design entirely consists of the outer shell 18. For example, a portion of the outer shell 18 may be located in a non-exterior portion. In other words, the outer shell 18 may constitute a portion of the non-exterior portion.

[0049] In the present embodiment, the outer shell 18 includes a widened portion 18d having an electrical contact portion. The widened portion 18d is formed in an area including the electrical contact portion by, for example, a retaining portion that is retained when the plating film 19 is formed by electroplating. That is, the outer shell 18 constitutes an electrical contact. For example, in the present embodiment, the widened portion 18d is a portion formed by a portion of the outer wall portion 18a protruding toward the inner circumference, constituting a portion of the circumference of the shell 11. In addition, the outer shell 18 may also constitute a portion of the non-appearance portion, such as a portion near the boundary between the appearance portion and the non-appearance portion. As an example, in the present embodiment, the plating film 19 is also formed in the widened portion 18d that becomes the electrical contact portion serving as the non-appearance portion. In addition, the plating film 19 may also be formed in a portion of the non-appearance portion, such as a portion near the boundary between the appearance portion and the non-appearance portion. For example, the thickness of the plating film 19 is about 30 μm.

[0050] In this embodiment, an annular groove 21 for accommodating an O-ring 41 is formed on the edge of the back side of the housing 11. The O-ring 41 is installed in the annular groove 21 to ensure airtightness and waterproofing between the housing 11 and the rear cover 12. For example, the annular groove 21 is formed along the entire circumference. The back surface of the housing 11, facing the rear cover 12, is a recessed portion that is recessed toward the front. The annular groove 21 includes a bottom portion 21a that is recessed toward the front side relative to the back surface of the housing 11, an inner side wall 21b, and an outer side wall 21c. The bottom portion 21a of the annular groove 21 is arranged across the boundary B1 between the inner shell portion 17 and the outer shell portion 18 in the width direction of the annular groove 21. That is, the inner side wall 21b of the annular groove 21 is located on the inner shell portion 17, while the outer side wall 21c is formed on the outer shell portion 18.

[0051] Here, in this embodiment, the widthwise center C1 of the annular groove 21 is positioned at the outer shell portion 18. Specifically, the boundary B1 between the outer shell portion 18 and the inner shell portion 17 in the widthwise direction of the annular groove 21 is positioned inward of the widthwise center C1 of the annular groove 21. Therefore, the widthwise center position of the annular groove 21 of the O-ring 41 is positioned opposite the outer shell portion 18.

[0052] For example, a coating 19 is formed on the outer shell 18 of the bottom portion 21a of the annular groove 21. This creates steps between the outer shell 18 and the inner shell 17 at the widthwise and circumferential boundaries B1 and B2 of the annular groove 21, respectively. However, by positioning the center of the O-ring 41's cross section toward the outer shell 18, such that the center does not abut the steps, poor airtightness can be prevented. For example, the position of boundary B1 is set so that the first molded portion 17 accounts for no more than one-third of the bottom portion 21a of the annular groove 21 in the widthwise direction of the annular groove 21. Thus, a circumferential boundary B2 is formed between the outer shell 18 and the inner shell 17 along the outer circumference. However, the contact portion (the thickest portion) near the center of the O-ring 41, which contributes to airtightness, does not cross this circumferential boundary B2 and pass over the outer shell 18.

[0053] Figure 6 The airtight portion between the housing 11 and the rear cover 12 is shown in an enlarged view. To ensure a minimum wall thickness for the inner shell portion 17 of the housing 11, boundaries B1 and B2 exist between the inner shell portion 17 and the secondary molded portion 18 at the bottom portion 21a, which serves as the airtight surface of the annular groove 21 of the housing 11. However, these boundaries do not reach the center of the compressed portion serving as the O-ring 41, thereby maintaining airtightness.

[0054] In this embodiment, electrical contacts are provided in the internal areas that are not exposed after the rear cover 12 and windshield member 40 are assembled. For example, the rack portions P2 and P3, which are held by the fixture during the rack plating, are located on the inner surface of the housing 11. The rack portions P2 at two locations on one side are formed into outer shell portions 18 made of the second resin material, thereby functioning as both a holding portion and an electrical contact for the plating. Furthermore, the rack portions P3 at two locations on the other side are formed into inner shell portions 17 made of the first resin material.

[0055] In this embodiment, during the electroplating process, the energizing arm is pressed against four rack portions P2 and P3 on the inner circumference of the substrate 110, applying pressure from the inside toward the outside to maintain the grip. Here, the rack portions P2, which serve as the retaining portions at least on one side, are formed by the widened portion 18d, which is part of the secondary molded portion 18, thereby forming electrical contacts.

[0056] This embodiment also achieves the same effects as the first embodiment described above. Furthermore, according to this embodiment, since the electrical contacts can be secured on the inside, it is possible to prevent the appearance of poorly-appeared portions due to uneven plating thickness from reaching the exterior surface, thereby preventing degradation of corrosion resistance. Furthermore, in the second embodiment, since the plated electrical contacts can be easily located on the inside, the center of the cross-section of the O-ring 41 can be configured to be the outer shell 18 made of the plated resin. While the outer shell 18 of the bottom portion 21a of the annular groove 21 is formed with a plating film of Au or the like, the surface position becomes higher. However, by arranging the pressurized portion of the O-ring 41, i.e., the center portion of the O-ring 41, so as not to overlap with the steps of the boundaries B1 and B2, poor airtightness can be suppressed.

[0057] The above embodiments are merely illustrative and do not limit the scope of the invention. For example, in the first embodiment, the outer peripheral surface of the substrate 110 is pressed from four points to hold the substrate 110 during the electroplating process, but the present invention is not limited to this. For example, the current-carrying arm may be hooked and held by the cylindrical portion 18b, with the cylindrical portion 18b serving as an electrical contact.

[0058] Furthermore, the materials to be plated and non-plated are not limited to those described above and can be modified as appropriate. For example, the materials to be plated or the type of treatment to be applied can be appropriately selected. Furthermore, in the above embodiment, the entire exterior portion visible from the outside is used as the outer shell 18, and the plated film 19 is formed over the entire exterior portion. However, this is not limiting. For example, a portion of the exterior portion visible from the outside may have no plated film 19 formed thereon.

[0059] Furthermore, the positions of the annular groove 21 and the O-ring 41 are not limited to those described above. For example, in the second embodiment described above, the annular groove 21 is formed throughout the width direction of the inner shell portion 17 and the outer shell portion 18, and the O-ring 41 is positioned at the boundary. However, the annular groove 21 and the O-ring 41 may also be formed in the outer shell portion 18 region. For example, if the electrical contact point during plating is set outside the inner side surface and the widened portion 18d is not formed, since the inner shell portion 17 is formed throughout its entire circumference, no circumferential boundary B2 or step is generated. Therefore, the center position of the O-ring 41 can be positioned on either side of the outer shell portion 18 or the inner shell portion 17.

[0060] For example, in the above embodiment, the windshield 40 and the back cover 12 are shown as examples of cover components, but this is not limiting. A bezel or other components may also be used. Furthermore, the primary and secondary molding steps may be reversed. Furthermore, in the above embodiment, the watch case 10 is shown as an example of a device, but this is not limiting. For example, it can be applied to various devices that do not have a timekeeping function.

[0061] Several embodiments of the present invention have been described, but the specific structures, configurations, and positional relationships shown in the above embodiments can be appropriately modified without departing from the spirit of the present invention. The scope of the present invention is encompassed by the inventions described in the claims and their equivalents.

Claims

1. A housing device, characterized in that: have: inner shell; shell; a plating film formed on a surface of the housing as an exterior portion that can be visually confirmed from the outside; and Cover parts, The housing is made of a second material that is a material to be plated and on which the plated film can be formed. The inner shell is made of a first material that is a non-plating target material and on which the plating film is less likely to form than the second material. The inner shell is covered by the outer shell and the cover member.

2. The housing device according to claim 1, wherein: The plating film includes a first plating layer and a second plating layer, wherein the second plating layer is formed on a portion where the first plating layer is formed. The first material is a material that does not form the first plating layer.

3. The housing device according to claim 1, wherein: The second material is a material including ABS resin.

4. The housing device according to claim 1, wherein: The first material is polycarbonate.

5. The housing device according to claim 1, wherein: The housing device is cylindrical in shape. The outer shell includes an outer wall portion disposed on an outer peripheral side of the inner shell, and an extension portion connected to the outer wall portion and extending toward the inner peripheral side.

6. The housing device according to claim 1, wherein: Equipped with waterproof components, At the boundary between the inner shell and the outer shell, grooves are formed that are continuously arranged across each other. When the waterproof member is arranged in the groove, a portion of the waterproof member having the largest thickness contacts the housing.

7. The housing device according to claim 1, wherein: A portion of the housing is covered by the cover member.

8. A timepiece, characterized in that: have: The housing device according to claim 1; and A watch module is arranged in a storage portion formed inside the housing device. The cover member is at least one of a windshield member covering one side of the watch module and having a colored area, and a back cover covering the other side of the watch module.

9. A method for manufacturing a housing device, the housing device comprising an inner housing and an outer housing, wherein: A plating film is formed on an externally visible portion of the surface of the housing by electroplating. The housing is made of a second material that is a material to be plated and on which the plated film can be formed. The inner shell is made of a first material that is a non-plating target material and on which the plating film is less likely to be formed than the second material.

10. The method for manufacturing a housing device according to claim 9, wherein: Before forming the plating film, the inner shell is formed of the first material, and the outer shell is formed of the second material.

11. The method for manufacturing a housing device according to claim 9, wherein: The plating film includes a first plating layer and a second plating layer, wherein the second plating layer is formed on a portion where the first plating layer is formed. The first material is a material that does not form the first plating layer.

12. The method for manufacturing a housing device according to claim 9, wherein: The inner shell includes an inner wall portion disposed on the inner circumference side of the outer shell. The outer shell includes an outer wall portion disposed on the outer peripheral side of the inner shell and an extension portion extending from the outer wall portion toward the inner peripheral side. At least a portion of the extension constitutes an electrical contact in the electroplating process.

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