![]() Further, even when impact acts on the decorative jewel in the recess after the manufacturing step, a situation in which the decorative jewel falls off the recess due to the impact can be avoided. As a result, for example, the defect rate in the step of manufacturing the crown for a timepiece can be lowered. Therefore, since the inner side surface and the decorative jewel have an increased bonding area where they are bonded to each other via the bonding agent, the decorative jewel can be reliably fixed into the recess via the bonding agent. SUMMARYĪn advantage of some aspects of the invention is to provide a crown for a timepiece and a timepiece that allow a decorative jewel to be reliably fixed into a recess of a crown body.Ī crown for a timepiece according to an aspect of the invention is a crown for a timepiece including a crown body having a recess formed therein and a decorative jewel fixed into the recess, wherein a bonding agent is disposed between an inner side surface of the recess and the decorative jewel, and a depth dimension of the inner side surface is at least 0.5 mm.Īccording to the aspect of the invention, the depth dimension of the inner side surface of the recess is set to be greater than or equal to 0.5 mm, a sufficient amount of ultraviolet curable bonding agent is disposed between the inner side surface and the decorative jewel. ![]() The crown for a wristwatch described in JP-A-2002-62369 described above is, however, problematic in that the inner side surface of the recess and the transparent member has an insufficient bonding area where they are bonded to each other via a bonding agent in some cases, and the transparent member is therefore likely to come off the recess. After the transparent member is disposed on the sheet onto which the UV curable bonding agent is applied, the resultant structure is irradiated with ultraviolet light so that the transparent member is fixed to the head section. In the crown for a wristwatch described in JP-A-2002-62369 described above, a recess is formed in a head section of a crown body, a sheet on which a positioning mark is printed is disposed in the recess and fixed therein, and a UV curable bonding agent is applied onto the sheet. A crown is connected to the thus configured movement via a winding stem, and a transparent member (decorative jewel) for improving decorativeness is fixed to a head section of the crown (see JP-A-2002-62369, for example). In related art, an enclosure of a wristwatch incorporates a movement that includes stepper motors and wheel trains and drives an hour hand, a minute hand, and a second hand via the stepper motors and the wheel trains. The present invention relates to a crown for a timepiece and a timepiece. A timepiece comprising the crown for a timepiece according to claim 4. A timepiece comprising the crown for a timepiece according to claim 3.Ĩ. A timepiece comprising the crown for a timepiece according to claim 2.ħ. A timepiece comprising the crown for a timepiece according to claim 1.Ħ. The crown for a timepiece according to claim 1, wherein the bonding agent is an ultraviolet curable bonding agent.ĥ. ![]() The crown for a timepiece according to claim 2, wherein the side surface extends from a position on a side facing the bottom surface of the recess to a position shifted from an opening surface of the recess toward the bottom surface, the decorative jewel has inclining surfaces that contiguously extend from an end of the side surface on a side opposite the bottom surface and incline in a direction in which the inclining surfaces separate away from the inner side surface, and the bonding agent is disposed between the inclining surfaces and the inner side surface.Ĥ. The crown for a timepiece according to claim 1, wherein the inner side surface perpendicularly rises from a bottom surface of the recess, the decorative jewel has a side surface parallel to the inner side surface, and the bonding agent is disposed between the inner side surface and the side surface.ģ. A crown for a timepiece comprising: a crown body having a recess formed therein and a decorative jewel fixed into the recess, wherein a bonding agent is disposed between an inner side surface of the recess and the decorative jewel, and a depth dimension of the inner side surface is at least 0.5 mm.Ģ.
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