JP2887932B2 - Watch with a jumping pointer structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for controlling the movement of an electronic timepiece.

[0002]

2. Description of the Related Art FIG. A stepping motor is formed by the stator 1, the coil block 2 and the rotor 3, and the rotor 3
When the rotor 3 rotates by 80 ° and does not rotate, the rotor 3 is attracted to a fixed position by the pulling torque with the stator 1. Rotation of the rotor 3 rotates a fourth wheel 6 through which a second hand 5 indicated by a dashed line is mounted via a fifth wheel 4. Since the reduction ratio between the rotor 3 and the fourth wheel 6 is set to 30, the second hand 5 rotates by 6 ° with respect to one rotation of the rotor 3,
Make one lap in one minute.

[0003] Fig. 4 shows another conventional structure for controlling a guideline. In this conventional example, a second jump control lever 7 is added to the conventional example of FIG. The second jump control lever 7 includes a jump control portion 7a, a jump control spring 7b, and a spring fixing portion 7c. The jump control portion 7a is engaged with a gear wheel of a fourth wheel 6 having 60 teeth to position the second hand 5. Has been stipulated.

[0004]

However, the former structure of the prior art does not allow the rotor 3 to rotate even if its position in the rotational direction is determined.
In the range of gear backlash between the fifth wheel 4 and the fifth wheel 4 and the fourth wheel 6, the indicated position of the second hand 5 shifts from the dial scale, and the second hand 5 and the dial scale match. Not a bad looking watch.

In the latter conventional structure, the position of the rotor 3 shifts unless the phase of the gear of the fourth wheel 6 determined by the rotor 3 and the jump control portion 7a of the second jump control lever 7 are accurately aligned. As a result, the motor performance is degraded or the jump control part 7a and the gear wheel of the fourth wheel 6 stop at the tip of each other, so that the second hand cannot be correctly controlled. For this reason, some means for correcting the phase of the gear of the jump control unit 7a and the fourth wheel 6 is required. In addition, during assembly, the second jump control lever 7 is hooked onto the fourth wheel 6, and then the wheel train bearing as a bearing is assembled. Therefore, it is very difficult to assemble, and it is also difficult to fix the jump control portion 7a and the jump control spring 7b. It is expensive in terms of cost.

The present invention solves such a problem. It is an object of the present invention to provide a timepiece jump control structure which has a simple structure, is easy to assemble, and reduces the displacement of the pointer position. To provide.

[0007]

According to the present invention, there is provided an electronic timepiece having a pointer jumping structure, a pointer, a pointer wheel for fixing the pointer,
The driving unit of the clock body, at least one wheel train transmitting the movement of the driving unit to the pointer wheel, the pointer wheel or the rotation of the pointer wheel or the wheel driven by the toothed portion of the vehicle driven by the pointer wheel. In a timepiece having a jump control structure having a jump control spring for applying a force in a direction opposite to the direction, the jump control spring does not give initial deformation to the jump control spring when assembling the jump control spring. Insert the tip between the teeth of the part and when the watch moves, the pointer wheel or the wheel deflects the jump control spring, and the reaction force causes a direction opposite to the rotation direction of the pointer wheel or the wheel. Characterized in that it is configured to apply force. Further, in the electronic timepiece having the guide jump control structure of the present invention, when assembling the jump control spring, when the tip is inserted between the teeth of the tooth profile portion without giving an initial deflection to the jump control spring, It is characterized by being directed to the pointer wheel or the rotation center direction of the wheel that deflects the spring when it moves.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing one embodiment of the present invention. In this embodiment, a second jump control lever 17 is added to the conventional example of FIG. The second jump control lever 17 includes a jump control spring 17b and a fixed portion 17c. At the time of assembling, the jump control spring 17b is provided with no initial deflection, its tip is inserted between the teeth of the fourth pinion 6b as shown by the dashed line, and faces the rotation center direction of the fourth pinion 6b. . 4th kana 6b in this state
Does not receive the force from the leap spring 17b.
Since the train wheel bridge can be easily incorporated into b, the assembly is easy. Then, when the watch is moved, the fourth wheel 6 rotates, and the tooth portion of the fourth pinion 6b deflects the jump control spring 17b like a chain line, and the fourth wheel 6 is turned in the opposite direction by the reaction force of the jump control spring 17b. Subject to rotational force. Here, since the position of the rotor 3 is determined by the pulling torque with the stator 1, the backlash up to the rotor 3 can be reduced in one direction.

FIG. 2 is a plan view showing another embodiment of the present invention. The wheel train from the rotor 3 to the fourth wheel 6 is the same as that of the conventional example of FIG. The second jump control lever 27 is engaged with the third wheel 9 driven by the fourth wheel 6. Thus, the backlash from the third wheel 9 to the rotor 3 can be reduced in one direction, and the second hand 5 is prevented from swinging.

Although the second hand has been described as having a sudden control structure, the minute hand, the hour hand and other hands have the same effect.

[0012]

As described above, according to the present invention, it is possible to eliminate the shake caused by the backlash of the hands, and to obtain a timepiece having a good appearance. Further, no adjustment mechanism is required, and the assembly is easy because the spring can be assembled without giving an initial deflection. Moreover, it is possible with a small number of parts.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention.

FIG. 2 is a plan view showing another embodiment of the present invention.

FIG. 3 is a plan view showing a conventional example.

FIG. 4 is a plan view showing another conventional example.

[Explanation of symbols]

 3 Rotor 4 5th wheel 5 second hand 6 4th wheel 9 3rd wheel 17, 27 seconds jump control lever

Claims (2)

(57) [Claims] 1. A pointer, a pointer wheel for fixing the pointer, a driving unit of a clock body, at least one wheel train transmitting the movement of the driving unit to the pointer wheel, driven by the pointer wheel or the pointer wheel. In a timepiece having a pointer jump control structure having a pointer wheel or a jump control spring for applying a force in a direction opposite to the rotation direction of the wheel by abutting on a tooth profile of the car, the jump control spring assembles the jump control spring. At this time, the tip is inserted between the teeth of the toothed portion without giving the initial deflection to the jump restraining spring, and when the clock moves, the pointer wheel or the wheel bends the jump restraining spring, and A timepiece having a pointer-jumping structure, wherein the timepiece is configured to apply a force in a direction opposite to a rotation direction of the pointer wheel or the wheel by force. 2. The jump control spring according to claim 1, wherein, when assembling the jump control spring, the tip is inserted between the teeth of the tooth profile portion without giving an initial deflection to the jump control spring.
A timepiece having a pointer-jumping structure, wherein the timepiece is directed toward the pointer wheel or the rotation center of the wheel, which deflects the spring when the timepiece moves.