JPH11174165A - Clock hand correction mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce number of spring parts, reduce interwining, and improve assembly property, by providing a reset lever return spring part for giving a return torque to a reset lever at one portion of other parts without providing it at a reset lever body. SOLUTION: A reset lever 5 lacks a return spring part, and number of spring parts is reduced to two, a shape is simplified, and a required material area is reduced. However, since a mechanism for giving return torque is required, a reset lever return spring part 33 that is a spring part being formed at one portion of a battery press plate 3 that is a part being installed originally for other purposes is brought into contact to give torque. A return spring contacting part is provided at a body that is a part with a high stiffness, but the distance between its position and a rotary shaft 50 is equal to or less than half or approximately 1/3 of the distance between the root of a reset spring part 53 and a switching spring part 54 that are other spring parts and the rotary shaft 50. The reset lever return spring part 33 is extremely wide and is strong, thus totally making it advantageous for improving an assembly property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the structure of a timepiece adjusting mechanism.

[0002]

2. Description of the Related Art First, an outline of a pointer correcting mechanism often used in a current pointer type electronic wristwatch will be described. In the normal hand operation without the time adjustment of the hands, the rotor of the step motor is the driving source, and the driving torque is from the wheel train to the rotor pinion → 5th gear / 5th pinion → 4th gear / 4th pinion (second hand axis)
→ 3rd gear / 3rd kana → 2nd gear / 2nd kana (minute hand shaft)
→ Day reverse gear / Day reverse kana → Transmission is via the hour wheel (hour hand). On the other hand, the correction torque at the time of the correction of the hands is transmitted through the route of crown / makizuma → tsumi wheel → reverse gear → second pinion (minute hand correction), reverse wheel kana → hour wheel (hour hand correction).

When the correction torque further acts on the speed-up gear train and the rotor, the correction torque becomes excessive due to the resistance, the correction speed decreases, the phase of the rotor magnetic pole shifts, and the timing of restarting is delayed. Therefore, the second hand only needs to be stopped at the time of correction, and it is not necessary to rotate and correct it. Normally, the correction torque is released by disengaging the third gear and the second gear in the wheel train. This prevents the second hand and the second hand from being transmitted so that corrective operations can be performed smoothly.

A mechanism for disengaging the lower gear is provided with a lower bearing of a third wheel (a bearing closer to the pinion) on a lever mechanism, and this lever is rotated in conjunction with an operation of pulling a crown to lower the lower bearing. Away from the 4th axle (pointer axis). As a result, the third wheel is inclined, and while the meshing between the third gear and the fourth wheel is maintained, the third wheel is disconnected from the second wheel, and the correction torque is not transmitted to the second hand and the rotor. . The above basic configuration is also disclosed, for example, in Japanese Utility Model Laid-Open No. 58-71181.

[0005] The main body of a type of clutch mechanism referred to as the third hook release is composed of a reset lever linked to the winding stem and a switching lever operated by the reset lever. FIG. 4 shows an example of a planar shape of a conventional reset lever 5. This is a leaf spring member made of metal.
1 is a main body.

Reference numeral 52 denotes a winding stem engaging portion, which is formed by bending a part of a plate material and normally abuts on the left side surface of the tip of the winding stem (shown in another view) in a hand-operated state. When the crown is pulled during the correction of the hands, the leading end of the winding stem moves upward, the winding engaging portion also moves upward, and the main body 51 rotates slightly counterclockwise. When the crown is pushed in after the correction operation, it returns to the old position.

Reference numeral 53 denotes a reset spring portion whose tip slides on the lower surface of a circuit board (not shown) located above the reset lever, and at the time of correction, as a result of the rotation, a reset pattern (shown in another figure). To apply a reference potential (potential of the outer can of the button-type battery that is in contact through a series of metal parts) to the reset terminal of the circuit to stop and reset the clock circuit.

Reference numeral 54 denotes a switching spring, and the vicinity of the tip is
It is inserted into the fork of a switching lever (shown in another figure) having a third wheel lower bearing, which is turned at the time of correction to disengage and is restored when the correction is completed. The return torque for restoration is generated by the return spring portion 55 whose tip is engaged with the part 11 of the main plate and is slightly bent in advance. As described above, the reset lever is also a kind of multi-purpose part. The relationship with other mechanisms will be described more clearly later in the embodiments of the present invention.

[0009]

The conventional reset lever has the following problems. (1) Processing was not easy because of the complicated shape. (2) Since three elongated spring portions are protruding, mutual entanglement and accompanying deformation may occur in a component feeder during plating work or automatic assembly, causing a problem in mass production.

(3) Since the long spring portions project in different directions, a large plate area is required and the material removing efficiency is poor. (4) At the time of assembling, it is necessary to insert the return spring portion 55 while bending it, and it is not easy to assemble.

An object of the present invention is to provide an improved pointer correcting mechanism for making the shape of a reset lever easy to process, not causing entanglement or deformation, high in material removal efficiency, and good in assemblability. That is.

[0012]

SUMMARY OF THE INVENTION A rotatable lever provided with one of the wheel train bearings to disconnect transmission of the pointer correction torque to the prime mover by disengaging a portion of the wheel train. The watch hand correction mechanism must have one or a combination of the following features. (1) A spring for applying a torque in a predetermined direction to the lever,
A part of another part originally provided for another purpose is provided with a spring property and is brought into contact with the lever.

(2) The other component is a plate member arranged substantially parallel to the turning surface of the lever, and the spring, which is a part thereof, is substantially perpendicular to the turning surface with respect to the lever. Contact with (3) The other component is a component that is assembled into the timepiece module after the reset lever, and the spring contacts the reset lever during the assembly process. (4) The other component is a plate member that hooks with the main plate to hold the train wheel bridge.

(5) The other component is a member having a spring portion that engages with the winding stem and gives a click feeling during the operation of the winding stem. (6) The distance between the rotating shaft and the contact portion of the reset lever in the reset lever is less than half the distance between the root of another spring portion of the reset lever and the rotating shaft. (7) The spring is provided close to a side surface of a button-type battery which is a power source of the timepiece.

[0015]

1 to 3 relate to an example of an embodiment of the present invention, and FIG. 3 is a plan view of a reset lever of the present invention. The numbers assigned to the respective parts are the same as those assigned to the conventional example shown in FIG. FIG. 1 is a plan view showing the operation of the pointer correcting mechanism according to the embodiment. The mechanism and operation are basically the same as those of the conventional example described above, except for the reset lever and its return spring mechanism. FIG. 2
(A), (b) is sectional drawing of the assembly state in the XX plane and the YY plane of FIG. 1, respectively.

The remarkable difference between the reset lever shown in FIG. 3 and the conventional example is that the return spring is omitted, the number of springs is reduced to two, the shape is simplified, and the required material area is reduced. It is that you are. However, since a mechanism for giving a return torque is necessary, a reset lever return spring 33, which is a spring part formed on a part of the battery presser plate 3, which is a part originally installed for another purpose, is brought into contact with the battery in the direction of the arrow. Apply a predetermined amount of torque.

The return spring contact portion 56 is provided on the main body 51, which is a highly rigid portion. The distance between the return spring contact portion 56 and the rotary shaft 50 depends on the positions of the reset spring portion 53 and the switching spring portion 54, which are other spring portions. It is less than half of the distance between the shaft and the rotating shaft 50, and is about 1/3 in the present embodiment. In order to apply a torque equivalent to that of the conventional example, the reset lever return spring 33 of another member is a considerably wide and strong spring.

In FIG. 1 and FIGS. 2A and 2B,
1 is a ground plate, 3 is a battery holding plate, and the outline of the two-dot chain line is further shaded. 4 is a switching lever, 40 is its rotating shaft, 41 is the third lower bearing on it, 42 is a switching spring engaging portion, which is composed of two opposing cylindrical surfaces and the switching spring portion 54 of the reset lever is inserted into the gap. In conjunction with the movement, the reset lever 5 is rotated and the third pinion is disengaged.

The rotation shaft 40 occupies a position substantially on a common tangent to a pitch circle (not shown) of each of the third pinion 87 and the fourth gear 84. Reference numeral 6 denotes a winding stem, the tip end portion 61 of which is in contact with the winding stem engaging portion 52 of the reset lever 5 to position the reset lever 5.

The battery holding plate 3 is a multipurpose leaf spring metal member provided on the upper surface of the timepiece module and covering most of the timepiece module. In addition to being fixed to the base plate by hooking on the side surface and pressing and fixing the train wheel bridge, the battery contact portion 31 contacts the outer can of a button type battery (not shown) which is a clock power source to position the battery and Of the positive electrode.

The standing bent portion at the tip of the core pressing spring portion 32 engages with the solo bang ball-shaped portion 62 of the winding stem 6 to position the winding stem and give a click feeling when the crown is pulled out. The main part of the reset lever 5 at the bottom of the main plate 1 is substantially parallel to the reset lever 5. A is a pointer shaft.

The plane arrangement of the reset lever return spring portion 33 is selected near the side surface of the button type battery, which has a relatively large margin. As shown in the cross section in FIG. 2 (b), the part that generates the spring property is composed of a part parallel to the main surface of the battery holding plate 3 and a part falling almost vertically toward the bottom of the watch module. Made up of The drooping portion abuts on the return abutment portion 56 of the main body 51 of the reset lever so as to be substantially perpendicular to the return abutment, and applies a return torque.

The position of each part in the normal hand operation state is drawn by a solid line in each figure, but the winding stem 6, the reset lever 3, and the switching lever 4 when the winding stem 6 is pulled for correction.
1 and the position after the movement of the third kana 87 are indicated by broken lines in FIG.
The position after the movement of the third pinion 87 and the third gear 86 is indicated by a broken line,
The direction of movement of the switching spring 54 of the reset lever is shown by an arrow in FIG. 2A, and the state of bending deformation of the reset lever return spring 33 of the battery pressing spring 3 is shown by a broken line in FIG.

Reference numeral 81 is a rotor kana, 82 is a fifth gear, 83 is a fifth gear, 84 is a fourth gear, 85 is a fourth gear, 86 is a third gear, 87 is a third gear, and 88 is a second gear. A gear, 89 is a second pinion, 90 is a minute back gear, 91 is a minute back gear, FIG. 3 shows their tip circles, and 92 shows a cross section of a pinwheel. The hour wheel that meshes with the back cover 91 is not shown. 7 is a reset pattern.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, a component other than the battery holding plate may be appropriately used as another component provided with the reset lever return spring portion.

[0026]

According to the present invention, the return spring for applying the return torque to the reset lever is not provided on the reset lever main body, but is provided on a part of another component installed for another purpose. The number of elongated spring parts has been reduced, and the processing of the reset lever has become easier. (2) The number of branches of the spring portion of the reset lever is reduced, and the troubles of the entanglement of the reset levers during the manufacturing process and the trouble of deformation due to it can be drastically reduced.

(3) The area of the reset lever is reduced, and the efficiency of removing material from the plate is improved. (4) Assemble the reset lever to the watch module
It is not necessary to perform the operation while bending the return spring, and the assemblability has been improved.

The effects related to the other components provided with the return spring portion are as follows. (5) Since the components used for the return spring are originally provided for other purposes, they can be used as a clock even if the return spring is separated. There is no increase in the number of parts. (6) When the other parts have a large area, the area of the increase in the material due to the additional return spring portion is zero or small.

(7) If the other component is a component to be incorporated after the reset lever, the effect of (4) is finally utilized without impairing the incorporation at all. (8) When the spring part provided on another part engages with the reset lever near the rotation axis thereof, the strength of the spring part necessarily increases, and no entanglement or deformation occurs between the other parts. Therefore, the above-described effects are not hindered, and the effect of comprehensively improving the assemblability is exhibited.

[Brief description of the drawings]

FIG. 1 is a plan operation view of an example of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an example of an embodiment of the present invention;
(A) shows the XX section in FIG. 3, and (b) shows the YY section.

FIG. 3 is a plan view of a reset lever according to an example of the embodiment of the present invention.

FIG. 4 is a plan view of a conventional reset lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground plate 2 Wheel train support 21 3rd wheel upper bearing 3 Battery holding plate 31 Battery contact portion 32 Winding presser spring portion 33 Reset lever return spring portion 4 Switching lever 40 Rotary shaft 41 3rd lower bearing 42 Reset spring engaging portion Reference Signs List 5 reset lever 50 rotating shaft 51 main body 52 winding true engaging part 53 reset spring part 54 switching spring part 55 return spring part 56 return spring contact part 6 winding true 7 reset pattern 81 rotor kana 82 fifth gear 83 fifth kana 84 No. 4 gear 85 No. 4 kana 86 No. 3 gear 87 No. 3 kana 88 No. 2 gear 89 No. 2 kana 90 Reverse gear 91 Sun reverse kana 92 Tsumi wheel A Pointer shaft

Claims (7)

[Claims] 1. A watch hand correction including a rotatable lever provided with one of the wheel train bearings to cut off transmission of the hand correction torque to the prime mover by disengaging a portion of the wheel train. The mechanism is characterized in that a spring for applying a torque in a predetermined direction to the lever is configured by imparting spring properties to a part of another component originally installed for another purpose and abutting against the lever. Pointer correction mechanism. 2. The other component is a plate member arranged substantially in parallel with the turning surface of the lever, and the spring, which is a part of the plate member, is substantially perpendicular to the turning surface with respect to the lever. The pointer correction mechanism according to claim 1, wherein the pointer correction mechanism is in contact with the pointer. 3. The pointer correction according to claim 1, wherein the other component is a component that is assembled into the timepiece module after the reset lever, and the spring contacts the reset lever during the assembly process. mechanism. 4. The pointer correcting mechanism according to claim 1, wherein the other component is a plate member that is engaged with the main plate by hooking and holding the train wheel bridge. 5. The pointer correcting mechanism according to claim 1, wherein the other component is a member having a spring portion which engages with the winding stem and gives a click feeling at the time of operating the winding stem. . 6. A distance between a contact portion of the reset lever and the rotation axis of the spring and a half of a distance between a root of another spring portion of the reset lever and the rotation axis. A pointer correction mechanism according to any one of claims 1 to 5. 7. The pointer correcting mechanism according to claim 1, wherein the spring is provided near a side surface of a button-type battery serving as a power source of the timepiece.