Timepiece component and timepiece

Abstract

To provide a timepiece component and a timepiece having a small thickness and excellent aesthetic appearance.SOLUTION: A timepiece component 3 is formed by joining a dial 31 and a ring 32 placed on the dial 31 to decorate an outer peripheral part of the dial by caulking, and when a direction extending from a center 33 of the dial 31 to the outer periphery is defined as an X plus direction, an outer peripheral direction orthogonal to the X plus direction is defined as a Y direction, and a thickness direction orthogonal to them is defined as a Z direction, the ring 32 includes a flat portion 36 having a surface substantially parallel to the dial plate 31, an inclined portion 37 continuous with the flat portion 36 and inclined so as to become thinner in the Z direction toward the center 33, and a leg portion 38 extending in the Z direction for caulking the ring to the dial 31, the dial 31 has a through hole 35 for inserting the leg portion 38, and the flat portion 36 of the ring 32 and the through hole 35 of the dial 31 have an overlapping region in the X-plus direction of an XZ cross section including the leg portion 38 and the center.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a timepiece component and a timepiece. [Background technology]

[0002] Conventionally, a dial for a ring-type watch is composed of a ring with numbers and scales printed on the inner slope and a dial with a function display part formed thereon. Patent Document 1 discloses a structure in which the ring and the dial are bonded with an adhesive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-186354 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the dial for a watch with a ring, which is a watch part described in Patent Document 1, does not have a means for indicating a specific position when joining the ring and the dial, and there is a problem that a dedicated jig or device is required to precisely align the numbers, scales, and other functional indications printed on the beveled surface. Also, there is a risk that the adhesive between the ring and the dial will overflow onto the dial, reducing its aesthetic appeal. [Means for solving the problem]

[0005] The timepiece part is a timepiece part formed by crimping a dial and a ring that is placed on the dial and decorates its outer periphery, where when the direction extending from the center of the dial to the outer periphery is defined as the X-plus direction, the outer periphery direction perpendicular to the X-plus direction is defined as the Y-direction, and the thickness direction perpendicular to the Y-direction is defined as the Z-direction, the ring has a flat portion with a surface approximately parallel to the dial, a sloping portion that is continuous with the flat portion and slopes downward toward the center so as to become thinner in the Z-direction, and a leg extending in the Z-direction for crimping to the dial, the dial has a through hole for inserting the leg, and in the X-plus direction of an XZ cross section including the leg and the center, the flat portion of the ring and the through hole of the dial have an overlapping area.

[0006] The timepiece comprises the timepiece component and an outer case. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view showing the schematic structure of a timepiece according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a cross-sectional view showing the schematic structure of a timepiece according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a plan view showing the schematic structure of a timepiece component included in the timepiece according to the embodiment of the invention. [Figure 4] Cross-sectional view taken along line AA in Figure 3. [Diagram 5] An enlarged view of part B in Figure 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First, a wristwatch will be taken as an example of a timepiece 1 according to this embodiment and will be described with reference to FIGS. 1 and 2. FIG. For ease of explanation, the following figures show three mutually orthogonal axes, the X-axis, the Y-axis, and the Z-axis. The direction along the X-axis is called the "X-direction", the direction along the Y-axis is called the "Y-direction", and the direction along the Z-axis is called the "Z-direction". The tip of the arrow in each axial direction is also called the "plus side", the base end is called the "minus side", the plus side of the Z direction is also called the "upper" and the minus side of the Z direction is also called the "lower".

[0009] As shown in Figs. 1 and 2, the timepiece 1 comprises an outer case 2, a back cover 9, a crystal 5, and timepiece parts 3. The outer case 2 is configured by fitting a bezel 22 made of ceramic or metal into a cylindrical case body 21 made of metal. A disk-shaped timepiece part 3 is disposed on the inner periphery of this bezel 22 via an annular dial ring 6 made of plastic. The timepiece part 3 is configured by connecting an annular ring 32 to a disk-shaped dial 31 by caulking. A crown 7 is provided on the side of the outer case 2 at the 3 o'clock position on the timepiece.

[0010] Of the two openings in the metal case body 21 of the watch 1, the opening on the front side, which is on the positive side in the Z direction, is covered by a cover crystal 5 via a bezel 22, and the opening on the back side, which is on the negative side in the Z direction, is covered by a back cover 9 made of metal. Metallic materials such as brass, stainless steel, titanium, etc. are used for the case body 21 and the back cover 9. Note that the case body 21 may be made of materials other than metal, such as resin.

[0011] Next, the internal structure housed within the exterior case 2 of the timepiece 1 will be described. As shown in FIG. 2, the space enclosed by the exterior case 2, the back cover 9, and the cover crystal 5 houses the dial ring 6, a time display unit 10 including the timepiece parts 3, and a movement 13.

[0012] The outer peripheral edge of the dial ring 6 contacts the inner peripheral surface of the bezel 22, and the dial ring 6 has a flat portion with one surface parallel to the cover crystal 5, and an inclined portion inclined toward the watch component 3. The dial ring 6 has a circular ring shape in a plan view, and a cone shape in a cross section.

[0013] The time display unit 10 is powered by power such as a battery and displays the time. It has hour hand 4A, minute hand 4B, and second hand 4C, which are hands, between timepiece parts 3 including a dial 31 and a cover crystal 5, and is positioned inside the dial ring 6.

[0014] A movement 13 is disposed between the timepiece component 3 and the back cover 9. A movement that has been used in wristwatches in the past can be used for the movement 13. In this embodiment, the movement 13 is provided on the main plate 12 with a battery (not shown), a step motor (not shown) that is driven by the battery power, and a gear train (not shown) that is driven by the step motor. 1 via a step motor and a wheel train. The hour hand 4A, minute hand 4B, and second hand 4C are attached to a pointer shaft 11 provided at the center of the plane of the dial 31. A winding stem 8 is attached to the movement 13, and a crown 7 is attached to the end of the winding stem 8.

[0015] Next, the watch component 3 will be described with reference to FIGS. As shown in Figures 3, 4, and 5, the timepiece component 3 is made up of a disk-shaped dial 31 and an annular ring 32 that is placed on the dial 31 and decorates its outer periphery, and is joined by riveting. Therefore, the dial 31 and the ring 32 can be accurately aligned without using a dedicated jig or device. By attaching the ring 32, a three-dimensional effect is given to the dial 31, and the aesthetic appeal can be improved. Furthermore, by providing the ring 32 with a time function such as a scale that indicates the time, legibility can be improved.

[0016] The ring 32 has a flat portion 36 having a surface approximately parallel to the dial 31, an inclined portion 37 that is continuous with the flat portion 36 and inclined so as to become thinner in the Z direction toward the center 33, and legs 38 that extend in the Z direction for crimping and fixing to the dial 31. The legs 38 are cylindrical, and multiple legs 38 are provided. In this embodiment, there are four legs 38, but three or more are preferable in terms of maintaining the parallelism and connection strength between the ring 32 and the dial 31.

[0017] Furthermore, the ring 32 is made of brass, and has a thickness t of 0.6 mm or more and less than 1.0 mm. Because the thickness t of the ring 32 is less than 1.0 mm, the entire timepiece component 3, including the dial 31, is thin, which leads to a thinner timepiece 1 itself, achieving high marketability and usability. Furthermore, if the thickness t of the ring 32 is less than 0.6 mm, the mechanical strength is weakened, and the ring 32 is more likely to deform when crimped, reducing aesthetic appeal, so the thickness t of the ring 32 is preferably 0.6 mm or more.

[0018] The dial 31 has a shaft hole 34 in the center for passing the pivot 11 through, and through holes 35 on the outer periphery for receiving the legs 38. The through holes 35 are circular, and multiple holes are provided at positions facing the legs 38 of the ring 32. This allows the dial 31 and the ring 32 to be accurately aligned and joined together.

[0019] Next, the relationship between the flat portion 36 of the ring 32 and the through hole 35 of the dial 31 will be described using the joint portion at the 3 o'clock position on the time display as an example. Here, when the direction extending from the center 33 of the dial 31 to the outer periphery is the X-plus direction, the outer periphery direction perpendicular to the X-plus direction is the Y-direction, and the thickness direction perpendicular to the Y-direction is the Z-direction, as shown in Figures 4 and 5, in the X-plus direction of the XZ cross section including the leg 38 and the center 33, the flat portion 36 of the ring 32 and the through hole 35 of the dial 31 have an overlapping area. That is, the area of ​​the through hole 35 having a length D which is the diameter of the through hole 35 overlaps with the area of ​​the flat portion 36 having a length L from the end of the through hole 35 on the positive side in the X-direction to the contact of the flat portion 36 of the ring 32 with the inclined portion 37. The overlapping area is preferably 40% or more and less than 100% of the area where the through hole 35 is located. In other words, L / D is preferably 40% or more and less than 100%.

[0020] If the overlapping area is less than 40% of the area where the through hole 35 is located, the length L of the flat portion 36 will be shortened, and the inclined portion 37 will be lengthened, so that the inner end of the ring 32, i.e., the end of the inclined portion 37 opposite the flat portion 36, will be deformed during crimping, resulting in a gap between the dial 31 and the ring 32 and reducing the aesthetic appeal.

[0021] Furthermore, if the overlapping area is 100% or more of the area where the through hole 35 is located, the inner diameter of the ring 32 becomes smaller, and the overlapping area between the ring 32 and the dial 31 increases in a planar view, i.e., the display area of ​​the dial 31 becomes smaller, reducing readability and aesthetic appeal.

[0022] 5 shows the state before crimping, with a gap between the through hole 35 of the dial 31 and the leg 38 of the ring 32. Therefore, after crimping, the outer periphery of the leg 38 presses against the inner wall of the through hole 35, so the dial 31 and the ring 32 can be joined together.

[0023] In this embodiment, the joint at the 3 o'clock position on the clock display has been described, but the joints at the 6 o'clock, 9 o'clock, and 12 o'clock positions have the same configuration. That is, at the joint at the 6 o'clock position on the clock display, the negative Y direction extending from the center 33 of the dial 31 to the outer periphery corresponds to the positive X direction, and the X direction perpendicular to this corresponds to the Y direction. Also, at the joint at the 9 o'clock position on the clock display, the negative X direction extending from the center 33 of the dial 31 to the outer periphery corresponds to the positive X direction. Also, at the joint at the 12 o'clock position on the clock display, the positive Y direction extending from the center 33 of the dial 31 to the outer periphery corresponds to the positive X direction, and the X direction perpendicular to this corresponds to the Y direction.

[0024] As described above, the timepiece component 3 included in the timepiece 1 according to this embodiment provides the following advantages. The timepiece part 3 is made up of a dial 31 having a plurality of through holes 35 and a ring 32 having a plurality of legs 38, which are joined by caulking, so that the dial 31 and the ring 32 can be accurately aligned and joined together without using any special jigs or devices.

[0025] Furthermore, the flat portion 36 of the ring 32 and the through hole 35 of the dial 31 have an overlapping area in the XZ cross section, and the overlapping area is 40% or more but less than 100% of the area of ​​the through hole 35. This prevents the inner end of the ring 32 from deforming during crimping, preventing a gap from occurring between the dial 31 and the ring 32, and improving aesthetics.

[0026] Furthermore, since the thickness t of the ring 32 is equal to or greater than 0.6 mm and less than 1.0 mm, the ring 32 is less likely to deform when crimped, and the entire timepiece part 3 including the dial 31 is thinner, allowing the thickness of the timepiece 1 itself to be reduced, thereby achieving high aesthetic appeal, high merchantability, and usability. [Explanation of symbols]

[0027] 1...watch, 2...exterior case, 3...watch parts, 4A...hour hand, 4B...minute hand, 4C...second hand, 5...crystal, 6...dial ring, 7...crown, 8...winding stem, 9...back cover, 10...time display section, 11...hand axis, 12...main plate, 13...movement, 21...case body, 22...bezel, 31...dial, 32...ring, 33...center, 34...axis hole, 35...through hole, 36...flat section, 37...inclined section, 38...legs, D...length, L...length, t...thickness.

Claims

1. The dial and A timepiece part which is mounted on the dial and which decorates the outer periphery of the dial and is joined by riveting, When the direction extending from the center of the dial to the outer periphery is defined as the X-plus direction, the outer periphery direction perpendicular to the X-plus direction is defined as the Y-direction, and the thickness direction perpendicular to the Y-direction is defined as the Z-direction, The ring is a flat portion having a surface substantially parallel to the dial, and an inclined portion that is continuous with the flat portion and inclined toward the center so as to become thinner in the Z direction; a leg portion extending in the Z direction for crimping and fixing to the dial; having The dial is A through hole for inserting the leg portion is provided, In the X-plus direction of an XZ cross section including the leg portion and the center, the flat portion of the ring and the through hole of the dial have an overlapping region. Watch parts.

2. The overlapping area is 40% or more and less than 100% of the area where the through holes are located.

2. A watch component according to claim 1.

3. The ring is made of brass and has a thickness of 0.6 mm or more and less than 1.0 mm.

2. A watch component according to claim 1.

4. the leg is cylindrical; The through hole is circular.

2. A watch component according to claim 1.

5. The leg portion and the through hole are provided in plurality.

2. A watch component according to claim 1.

6. A watch component according to claim 1; An outer case; clock.

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