JP2016099267A - Weight for automatic winding clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make processing of an automatic-winding-clock weight for decoration of the weight itself unnecessary, and prevent an adhesive agent from steeping on the occasion of fixing a decoration plate to the weight.SOLUTION: A weight for an automatic winding clock includes a weight plate 2 having at least an outer edge part 201 of an approximately circular arc shape and a center of the arc, and a decoration plate 1 fixed to the top face of the weight plate 2. An adhesion region 205 where the decoration plate 1 is adhered to the weight plate 2 is provided at least in a region including the periphery of the top face of the weight plate 2. By a groove being formed in a manner surrounding the adhesion region, steeping of an adhesive agent is prevented.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a self-winding timepiece weight.

  A weight used in an automatic watch or the like has, for example, a substantially semicircular shape.

  When the weight is used in a self-winding watch or the like, the circumference of the weight is particularly limited to ensure the torque in rotation within a plane centered on the central opening within a limited size. It is an important part. Therefore, the weight is preferably substantially semicircular, substantially fan-shaped, or a shape in which a central portion, a substantially arc-shaped portion, and a central portion and the substantially arc-shaped portion are connected by a straight line.

  In a timepiece called a so-called skeleton model, a structure in which the user can fully see the internal structure of the timepiece and enhance the aesthetic appearance is known.

  When the weight is seen from the outside, it is desirable to decorate the weight.

  Although the purpose is different, Patent Document 1 describes an example in which a sticker is attached to a weight.

Registered Utility Model No. 3002523 (FIG. 4, paragraph 0023)

  When the decoration is directly applied to the weight, the weight is often formed of tungsten having a large specific gravity because of its role, but these metals are often difficult to process.

  In designing, it is desirable to have the simplest possible structure for calculating the moment around the central axis. If the weight itself is processed, the amount of processing varies depending on the type of decoration, so The moment may be different or the balance of the weight may be lost.

  Furthermore, if the weight itself is processed thinly, the weight itself may be damaged when an impact is applied, and the automatic winding function may not be performed when used in, for example, an automatic watch. .

  When a seal is used as in Patent Document 1, there is a possibility of peeling with a solution such as alcohol during overhaul. In addition, it is difficult to provide a three-dimensional decoration such as a thin portion, a thick portion, or an opening. Furthermore, it is difficult to provide a high-class aesthetic with a seal.

  The self-winding watch weight includes a weight plate having a substantially arc-shaped outer edge portion and including the center of the arc, and a decorative plate fixed to the upper surface of the weight plate. It adhere | attaches on the said weight board in the adhesion | attachment area | region provided in the area | region containing the outer peripheral part.

  The decorative plate has an opening facing a region including a central portion of the weight plate, and the opening and the bonding region do not overlap in a plane.

  An outer groove is formed in the weight plate so as to surround the adhesion region of the weight plate.

  The weight plate has a thick part thicker than a central part in an outer peripheral part, and at least a part of the outer groove is formed in the thick part.

  An outer peripheral groove is formed in an outer peripheral portion facing at least the adhesion region of the decorative plate.

  The weight plate is provided with a hole through which the rotation shaft passes, a second adhesion region is formed around the hole, and a central groove is formed on the outer periphery of the second adhesion region. .

  The outer groove and the central groove are grooves formed by molding.

  According to the present invention, it is possible to realize a weight with full-scale decoration such as three-dimensional decoration. Also, a weight that can be easily decorated can be created.

(A) is a bottom view of a decorative board, (b) is a top view of a decorative board. (A) is a bottom view of the weight plate, (b) is a side view of the weight plate, and (c) is a top view of the weight plate. It is a figure which shows the state by which the decorative board was installed on the weight board, (a) is a bottom view, (b) is a top view. It is a figure explaining adhesion | attachment with a weight board and a decoration board, (a) is a case where there is no groove, (b) is a case where there is a groove. It is a figure explaining the bleeding of an adhesive agent.

  FIG. 1 shows a decorative plate 1, (a) is a bottom view, and (b) is a top view. The decorative plate 1 includes a substantially arc-shaped outer edge 101 and a center portion 102 of the arc, and as illustrated in FIG. 1, has a substantially semicircular shape in the present embodiment.

  Here, the center portion of the arc is a center portion of a circle including the arc indicated by reference numeral 102 in FIG. 1, and a shaft hole portion 103 is provided at the center, and the decorative plate 1 has the shaft hole portion 103. It can be rotated around the center.

  An opening 104 as a decoration is provided at the center of the decorative plate 1. Here, a region closer to the central portion than the outer edge 101 is referred to as a central portion. The opening 104 has a substantially elliptical shape or a substantially drop shape. As shown in FIG. 1, a substantially elliptical or drop-shaped thin portion 105 having a shape substantially similar to the opening 104 is provided around the opening 104. Giving aesthetics. Here, a portion thicker than the thin portion other than the opening 104 and the thin portion 105 is referred to as a thick portion. An outer peripheral groove 106 is provided on the outer periphery of the decorative plate 1.

  2 shows the weight plate 2, (a) is a bottom view, (b) is a side view, and (c) is a top view. The weight plate 2 includes at least a substantially arc-shaped outer edge 201 and a center portion 202 of the arc, and as illustrated in FIG. 2, has a substantially semicircular shape in the present embodiment.

Further, a shaft hole portion 203 is provided at the center, and the weight plate 2 is configured to be rotatable around the shaft hole portion 203. A central groove 204 is provided around the shaft hole 203. The center groove 204 will be described later.

  A substantially arc-shaped bonding region 205 for bonding the decorative plate 1 is provided on the outer peripheral portion of the weight plate 2. Here, a region closer to the outer edge 201 having the substantially arc shape than the center portion 202 of the circle is referred to as an outer peripheral portion. An outer groove 206 is provided around the adhesion region 205. The outer groove 206 will be described later. A frame portion 207 is provided on the outermost peripheral portion of the weight plate closer to the outer edge 201 than the outer groove 206.

  Similar to the decorative plate 1, also in the weight plate 2, a region closer to the central portion 202 than the outer edge 201 is referred to as a central portion. In the present embodiment, the central portion and the outer peripheral portion are thicker than the central portion 202, and the frame portion 207 is thicker than the central portion and the outer peripheral portion.

  3A and 3B are diagrams for explaining a state in which the decorative plate 1 is bonded onto the weight plate 2, wherein FIG. 3A is a bottom view and FIG. 3B is a top view. The decorative plate 1 is bonded to the weight plate 2 in an adhesive region 205 indicated by a broken line in FIG. As shown in FIG. 3B, the opening 104, the adhesion region 205, and the outer groove 206 do not overlap in plan view. Further, by providing at least a part of the outer groove 206 in the thick part, the strength of the weight plate 2 can be maintained even if the groove is formed.

  Here, when the weight plate 2 and the decorative plate 1 are bonded by the adhesive 3, it is difficult to strictly control the amount of the adhesive 3. For this reason, if there is no groove around the adhesion region of the weight plate 2 as shown in FIG. 4A, the adhesive 3 oozes out as shown in FIG. The adhesive 3 may adhere to the part.

  Therefore, as shown in FIG. 4B, when the outer peripheral groove 106 and the outer groove 206 are provided around the bonding region, the adhesive 3 accumulates in the groove, so that the adhesive 3 can be prevented from seeping out. The groove can be provided not only on the weight plate 2 but also on the decorative plate 1. Further, the groove is not necessarily provided on the entire circumference of the adhesion region. For example, the decorative plate 1 may be configured such that a groove is provided only on the outer periphery of the decorative plate 1 as shown in FIG. 1A, that is, the decorative plate 1 is provided with a groove only on the outer edge 101 side of the adhesion region.

  In the present embodiment, both the outer peripheral groove 106 and the outer groove 206 are formed at least on the outer peripheral portion facing the bonding region, but the outer peripheral groove 106 and the outer groove 206 may not be opposed to each other. Good.

  A second adhesion region may be provided around the shaft hole 203. In this case as well, the central groove 204 can be provided on the outer periphery of the second adhesive region in order to prevent the adhesive from seeping out.

  Of course, the present invention is not limited to the above embodiment. For example, in the above embodiment, the weight plate and the decorative plate are both substantially semicircular, but may be substantially fan-shaped with a central angle of 90 degrees or more, or the central portion, the outer edge of a substantially arc shape, And it is good also as a structure which consists of a linear connection part which connects this center part and this outer edge part.

  In the above embodiment, the decorative plate is bonded to the weight plate, but may be fixed by crimping or caulking.

  The adhesive used for bonding is desirably an adhesive that is insoluble in alcohols so as not to dissolve during overhaul.

  For the decorative plate, a metal that is easier to process than the metal of the weight plate can be used. Thereby, processing becomes easy and three-dimensional decorations, such as a thin part, a thick part, and an opening part, are realizable.

  The decorative plate can be formed of a resin such as plastic. Thereby, the decorative board which has various colors is realizable.

  When a material such as metal or resin with a specific gravity smaller than that of the weight plate is used as the decorative plate, the majority of the total weight of the weight including the weight plate and the decorative plate is determined by the weight plate. There is no significant loss of balance.

  When bonding the weight plate and the decorative plate with an adhesive, the larger the bonding area, the better in order to prevent the decorative plate from peeling off. However, when the decorative plate is provided with an opening, it cannot be adhered to the opening. In the skeleton type self-winding timepiece, since the center portion is often noticed mainly, the opening is often provided near the center portion. Therefore, it is desirable to provide the adhesion region on the outer peripheral portion. In particular, in a self-winding timepiece, since the outer peripheral portion of the weight plate is an important part that determines the moment about the shaft hole, there is often a region sufficient for adhesion on the outer peripheral portion.

  In addition, a groove | channel may be provided only in one or both of a weight board or a decorative board. Alternatively, the outer groove can be provided on the decorative plate, and the central groove can be provided on the weight plate, or vice versa.

  In the above embodiment, the bonding region and the surface of the peripheral region sandwiching the groove are on the same plane, but the bonding region may be formed thinner than the peripheral region, or the outer periphery of the bonding region Instead of providing a groove on the entire surface, the entire bonding region may be formed as a single groove.

  The groove provided in the weight plate can be formed by molding such as a mold. This is particularly effective when machining such as cutting is difficult. The same applies to the grooves provided in the decorative plate.

DESCRIPTION OF SYMBOLS 1 Decorative board 101 Outer edge 102 Center part 103 Shaft hole part 104 Opening part 105 Thin part 106 Outer peripheral groove 2 Weight plate 201 Outer edge 202 Center part 203 Shaft hole part 204 Central groove 205 Bonding area 206 Outer groove 207 Frame part 3 Adhesive

Claims (7)

A weight plate having a substantially arc-shaped outer edge and including the center of the arc, and a decorative plate fixed to the upper surface of the weight plate;
The self-winding watch weight, wherein the decorative plate is bonded to the weight plate in an adhesion region provided in a region including an outer peripheral portion of the upper surface of the weight plate. The decorative plate has an opening facing a region including a central portion of the weight plate;
The self-winding timepiece weight according to claim 1, wherein the opening and the bonding region do not overlap in a planar manner.   The self-winding watch weight according to claim 1 or 2, wherein an outer groove is formed in the weight plate so as to surround the adhesion region of the weight plate. The weight plate has a thick part thicker than the central part on the outer peripheral part,
The self-winding watch weight according to claim 3, wherein at least a part of the outer groove is formed in the thick portion.   5. The self-winding timepiece weight according to claim 1, wherein an outer peripheral groove is formed in an outer peripheral portion facing at least the adhesion region of the decorative plate. The weight plate is provided with a hole through which the rotation shaft passes,
A second adhesive region is formed around the hole;
The self-winding timepiece weight according to any one of claims 1 to 5, wherein a central groove is formed on an outer periphery of the second adhesion region. The self-winding watch weight according to any one of claims 3 to 6, wherein the outer groove and the central groove are grooves formed by molding.

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