JP3387609B2 - Pointer correction mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wristwatch correcting mechanism for a wristwatch. 2. Description of the Related Art A conventional pointer correcting mechanism will be described below with reference to the drawings. FIG. 4 is an assembly plan view showing a conventional pointer correcting mechanism, and FIG. 5 is a sectional view of the conventional pointer correcting mechanism.
Reference numeral 1 denotes a winding stem;
Engages with the groove side surface 1a on the outer periphery of the winding stem 1. Reference numeral 2c is a reference hole into which a pin is fitted as a base point of rotation of the reed 2.
Reference numeral 13 denotes a canker, which has an engaging portion 13b with the other end 2b of the mandarin duck 2, an engaging portion 13c with a ratchet wheel described later, and a spring portion 13d. Reference numeral 14 denotes a Tsuzumi car.
The outer peripheral surface has a groove side surface 14b that engages with the engaging portion 13c of the kanuki 13 and a crown gear 14a on the end surface.
The center of the winding stem 1 is a square hole 14c that is inserted into the cross-sectional corner 1b. Reference numeral 5 denotes a correction transmission wheel indicated by a vertical axis for transmitting rotation to the hands, and has a spur gear 5a that engages with a crown gear 14a of the thumbwheel. [0003] In the conventional pointer correction mechanism, when the winding stem 1 is pulled in the axial direction, the mandrel 2 rotates around the reference hole 2c, and the mandrel 13 swings by the mandrel 2; 14 moves in the axial direction of the winding stem 1, the crown gear 14a of the pinion wheel 14 and the spur gear 5a of the correction transmission wheel 5 are engaged, and the rotation of the pinion wheel 14 is transmitted to the correction transmission wheel 5 and the pointer is transmitted. Fix it. Conversely, pressing the winding stem 1 causes the force of the spring 13d to cause the thumbwheel 14 to rotate.
And the spur gear 5a and the crown gear 4a are disengaged, and the pointer correcting mechanism is released. [0004] However, in the conventional mechanism of engagement between the ratchet wheel and the knuckle in the conventional pointer correction mechanism, the cutting process (the rod material) having a low productivity in the manufacturing process in the shape of the conventional ratchet wheel is performed. → square hole punching → outer peripheral cutting → tooth splitting). [0005] An object of the present invention is to solve the above-mentioned problems, and to provide a processing method with high productivity by changing the shape of a conventional thumbwheel, thereby leading to cost reduction. In order to achieve the above object, the present invention provides a mechanism for engaging a thumbwheel and a knuckle in a pointer correcting mechanism, wherein a flange is provided on an outer peripheral surface of the thumbwheel. In addition, the knuckle is characterized in that it has an abutting surface that abuts on both side surfaces of the flange. [0007] That is, the pointer correcting mechanism of the present invention is a mechanism for engaging the thumbwheel and knuckle, which has a flange on the outer peripheral surface of the thumbwheel, and the knuckle has an abutting surface which comes into contact with both surfaces of the flange. With this configuration, it is possible to manufacture a pinion wheel by plastic working without impairing the conventional functions. An embodiment of the present invention will be described below in detail with reference to the drawings. 1 and 2 each show a pointer correcting mechanism according to an embodiment of the present invention. FIG. 1 is an assembled plan view of the pointer correcting mechanism, and FIG. 2 is a sectional view of the pointer correcting mechanism shown in FIG. . The same reference numerals and names are assigned to the same components as before,
Description is omitted. As shown in FIG. 1, 4 is a clutch wheel, and a crown gear 4a to the flange 4b and the end face which is engagement with the yoke, which will be described later on the outer peripheral surface of the tsuzuic Mi wheel 4, the cross section of the winding stem 1 It has a square hole 4c inserted through the corner 1b at the center. Reference numeral 3 denotes a canker. The canker 3 has a window provided with an engaging portion 3b with the other end 2b of the mandarin duck 2, a spring portion 3d, and a projection 3c which is a contact surface with the flange 4b. It is configured to engage. In addition,
An engagement portion between the flange 4b and the projection 3c is provided with a clearance that allows the thumbwheel to swing. Next, description will be made with reference to a sectional view 3 showing a processing procedure of the above-mentioned knob wheel. (A) is a material strip, (b) is a blank formed by pressing 1 (coining) on both sides of the strip, (c) is a blank (b) and press 2
It is a finished product formed by (punching). It should be noted that although the shape of the knuckle is also changed by changing the conventional mechanism of the thumbwheel, it can be manufactured by the conventional processing method (sequential punching processing). As described above, according to the present invention, in the engagement mechanism between the thumbwheel and the knuckle, a shape having a flange on the outer peripheral surface of the thumbwheel enables extremely high productivity (pressing). ) Processing can be performed.

[Brief description of the drawings] FIG. 1 is an assembled plan view of a pointer correcting mechanism according to the present invention. FIG. 2 is a sectional view of FIG. FIG. 3 is a cross-sectional view showing a processing procedure of a thumbwheel. FIG. 4 is an assembled plan view of a conventional pointer correcting mechanism. FIG. 5 is a sectional view of FIG. 4; [Explanation of symbols] 1 Makoto 2 mandarin duck 3 Kannuki 3c contact surface 4 Tsuzumi car 4b Flange (engagement part) 5 Correction transmission vehicle

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G04B 27/00-27/04 G04B 13/02 G04C 3/14

Claims (1)

(57) [Claim 1] A kanuki operated by moving a winding stem in an axial direction, an engaging portion engaging with the kanuki, and a correction transmission wheel supported by a vertical shaft. A pinion gear having an engaging and disengaging crown gear, wherein a thumb wheel inserted into the winding stem moves in the axial direction of the winding stem, and a crown correcting mechanism for engaging and disengaging the crown gear of the thumb wheel and the correction transmission wheel. An engagement portion between the thumbwheel and the knuckle has a flange on an outer peripheral surface of the thumbwheel, and the knuckle has an abutting surface that is in contact with both side surfaces of the flange. Correction mechanism.