JP2516566Y2 - Addition ring structure of mobile watch - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a slim adduction ring structure that simplifies the adduction ring structure of a portable timepiece and realizes downsizing of the configuration such as world time and circular slide rule. It is a thing.

[Conventional technology]

In the conventional adder ring structure, a movable gear is constructed in the winding stem part, and it is engaged with the gear of the adder ring and rotated by a crown. Various structures such as a method, a method of rotating a rotating bezel and transmitting the same by a gear to the inside of the case, and the like have been considered and put into practical use.

[Problems to be solved by the device]

The various conventional adduction ring structures have the following problems.

Any of the conventional structures has a large number of parts, and the cost is higher than the parts processing and assembling steps.

Due to the structure, the case was thick and large, and the design was poorly organized.

In the case of a slide rule device, there was a large error due to eccentricity between parts, deviation, etc., and there was a problem in terms of accuracy.

The present invention solves the above-mentioned problems, and an object thereof is to realize a highly accurate inner ring structure that can be downsized with a simple structure at low cost.

[Means for solving the problem]

The inner ring structure of the portable timepiece according to the present invention includes a fixed scale plate, a first flange portion of a downwardly facing step portion abutting the upper surface of a dial mounted on the timepiece machine body, and a body portion at a lower outer periphery thereof. Is provided with a second flange portion of an upward facing step portion that is held in contact with the lower surface of the inner wall step portion, a cutout portion is provided in a part of the fixed scale plate, and a rotation that penetrates the barrel is provided in the cutout portion. A gear fixed to the shaft is arranged, and a rotary scale plate provided with a gear portion engaging with the gear on the inner bottom surface of the fixed scale plate is rotatably and an inclination of the fixed scale plate. And the surface of the inclined portion of the rotary scale plate is arranged substantially on the same plane.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 11 is a case of a portable timepiece such as a wristwatch, and a lower surface 11a of an inner wall step portion thereof has a second flange portion provided on a lower outer side of a fixed scale plate 12. 12a is abutted. The first flange portion 12b provided on the inner upper side of the fixed scale plate 12 is brought into contact with the upper surface outer peripheral portion 14a of the timepiece dial 14 which is held and attached to the timepiece mechanical body 15 by the foot pressing method, and the timepiece mechanical body 15 is attached. By fixing the back cover 20 with screws via the spring part 15b of the watch mechanical body 15 and the watch dial 14,
Is securely held. The rotary scale plate 13 is arranged on the outer peripheral part of the fixed scale plate 12, is held by a blind plate 17 arranged on the fixed scale plate 12, and is formed in a corrugated plate spring shape attached to a notched step portion 13a provided on the outer peripheral upper part of the rotary scale plate 13. The elastic plate spring 18 is configured to be rotatable with respect to the body 11. The blind plate 17 is fixed between the cover glass 16 and the body 11 via a plastic ring 19.

FIG. 2 shows a gear transmission part of the present invention, in which a shaft part of the crown 31 is mounted via a packing 34 inside a pipe 33 penetrating from the side surface of the case body 21 to the inside of the case body, and an inner end part thereof. 31a
A screw hole for engagement of the gear 32 is formed in the. The gear 32 is fixed to the crown 31 by screw engagement, and the gear portion engages with the gear portion 23a provided on the lower portion of the rotary scale plate 23 configured to be rotatable on the body step portion via the elastic leaf spring 28. ing. In this structure, the fixed scale plate and the body are engaged with each other in the form of partial convex portions and concave portions, and are positioned in the rotational direction. As an example of the use of this mechanism, a scale as a multifunctional display device such as a circular slide ruler, world time by time difference display, scale, and map meter device is configured to correspond to a fixed scale plate and a rotary scale plate, respectively. There is.

In the above structure, the mechanical parts are preferably made of metal in terms of strength and durability, particularly stainless steel or titanium which does not require surface treatment, but reinforced plastics may be used if necessary. Further, the glass portion and the back lid portion may have a generally used structure other than this embodiment.

[Effect of device]

According to the present invention, the fixed scale plate has a first flange portion on the inner upper side which is in contact with the upper surface of the dial mounted on the timepiece machine body, and a lower peripheral portion is in contact with and is held by the lower surface of the inner wall step portion of the body. A second flange portion of an upward step is provided, a cutout portion is provided in a part of the fixed scale plate, and a gear fixed to a rotary shaft penetrating the barrel is arranged in the cutout portion. A rotary scale plate having a gear portion engaging with the gear on an inner peripheral surface of the fixed scale plate is rotatable, and an inclined portion of the fixed scale plate and an inclined portion of the rotary scale plate are rotatable. Since the surfaces of are almost coplanar,
The eccentricity and deviation between the fixed scale and the rotary scale are suppressed, the reading error is small, and precise calculation such as circular calculation can be performed.

Further, even when the dial is of the foot press-fixing type, the dial and timepiece mechanical body can be reliably held and fixed in the axial direction.

Furthermore, the number of parts is small, and the cost for processing parts and assembling man-hours can be reduced.

[Brief description of drawings]

 FIG. 1 is a partial vertical sectional view showing an embodiment of the present invention. FIG. 2 is a partial vertical sectional view showing an embodiment of an operating portion. 11,21 …… Body 12,22 …… Fixed scale plate 13,23 …… Rotating scale plate 18,28 …… Elastic leaf spring 31 …… Rise 32 …… Gear

Claims (1)

(57) [Scope of utility model registration request] 1. A first flange portion of a downwardly facing step portion abutting an upper surface of a dial mounted on a timepiece machine body at an inner upper portion of the fixed scale plate and a lower surface of an inner wall step portion of a case body at a lower peripheral portion thereof. A second flange portion of an upward step portion that is held in contact with is provided, a cutout portion is provided in a part of the fixed scale plate, and a gear fixed to a rotary shaft that penetrates the barrel is provided in the cutout portion. Arranged, rotatably a rotary scale plate provided with a gear portion engaging with the gear on an inner lower surface portion on an outer peripheral portion of the fixed scale plate, and
An inner ring structure for a portable timepiece, characterized in that the inclined scale portion of the fixed scale plate and the inclined scale surface of the rotary scale plate are disposed on substantially the same plane.