Gear mass, time difference correction mechanism, movement for clock, and clock
A gear body and gear technology, which is applied in the field of gear bodies, can solve the problems of expensive maintenance costs, easy wear and tear of star wheels and positioning parts, and large economic burdens, so as to reduce economic burdens, shorten maintenance work time, and maintain low-cost maintenance operations Effect
Active Publication Date: 2016-03-23
SEIKO INSTR INC
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Problems solved by technology
Therefore, when the time difference is corrected, the star wheel and the positioning part tend to be easily worn, and maintenance work such as repair or parts replacement is easily required.
[0008] However, since the conventional hour wheel has a complex structure in which a plurality of parts are integrated as described above, for example, it takes time and effort to repair it, and when it is difficult to repair it, the hour wheel has to be replaced with a new one.
Therefore, maintenance costs (after-sales service costs) will be incurred, and it is likely to cause a large economic burden on users, so there is room for improvement.
Method used
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Embodiment Construction
[0042] Embodiments of the present invention will be described below with reference to the drawings.
[0043] In addition, in this embodiment, as an example of a timepiece, a mechanical wristwatch will be described as an example.
[0044] (Structure of clock)
[0045] Generally, a mechanical body including a driving part of a timepiece is called a "movement". The state in which the dial and hands are attached to the movement and then put into the watch case to complete the finished product is called the "finished product" of the watch. Of the two sides of the main plate constituting the timepiece substrate, the side having the glass of the timepiece case (the side having the dial) is referred to as the “back side” of the movement. In addition, the side (the side opposite to the dial) having the case back cover of the timepiece case among the two sides of the main plate is referred to as the "front side" of the movement. In addition, in this embodiment, the direction from the...
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The present invention provides a gear mass, a time difference correction mechanism, a movement for a clock, and a clock. A star wheel or a locating rod can be easily repaired, and in addition, component replacement can be easily achieved according to needs. The gear mass comprises: a first gear which has a star wheel and rotates around an axis via a rotating force transmitted from a power source through a gear mechanism, wherein the star wheel has a plurality of claws; a second gear which is removably combined with the first gear and can freely rotate around the axis; and an intermediate which is arranged between the first gear and the second gear, is removably combined to the second gear and has a locating rod capable of achieving elastic deformation, wherein the locating rod is provided with locating claws removably clamped to the claws, the locating rod transmits the rotating force of the first gear to the second gear through clamping of the locating claws relative to the claws, and the locating rod can achieve elastic deformation in the form of removing the clamping of the locating claws relative to the claws, therefore, the second gear can rotate relative to the first gear.
Description
technical field [0001] The present invention relates to a gear body, a time difference correction mechanism, a watch movement, and a watch. Background technique [0002] Conventionally, there are known timepieces with a time difference correction mechanism that adjusts the hour hand to an arbitrary position in order to correct the time difference accompanying travel between regions with time difference. The so-called time difference correction is generally an operation of intermittently advancing or returning the hour hand hour by hour. As such a time difference correction mechanism, for example, a time difference correction mechanism using a jumper (jump lever) is known. [0003] For example, the time difference correction mechanism described in Patent Document 1 has an hour wheel formed by making the first cylindrical part to which the hour hand is attached, having a star wheel, and rotating with the rotation of the span wheel. The second cylinder part of the watch and t...
Claims
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IPC IPC(8): G04B13/02G04B27/00
CPCG04B19/025G04B27/026
Inventor 荒川康弘
Owner SEIKO INSTR INC