JPS6020063Y2 - clock stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stop device for a timepiece, particularly a stop device for temporarily stopping a timepiece wheel train during a hand setting operation.

2. Description of the Related Art Various stopping devices have been proposed in the past in order to accurately set the hands of a watch by stopping the rotation of a watch wheel train and an indicator hand when setting the hands of a watch.

The conventional stop device stops the rotation of the timepiece train by bringing the tip of a stop lever, which is linked to the hand setting operation, into contact with an arbitrary gear in the timepiece train.

In this conventional device, the stop lever itself has elasticity in order to obtain an abutting action on the gear, and as a result, the following disadvantages occur due to the pressing force in the radial direction of the gear.

That is, since a large elastic force is directly applied to the gear that the stop lever contacts, there is a drawback that the gear is bent and the tooth profile is deformed.

Furthermore, in conventional devices, in order to utilize the elasticity of the stop lever and obtain an appropriate elastic force when in contact with the gear, the shape and size accuracy or spring constant of the operating lever must be managed extremely accurately. It has the disadvantage of poor processing and assembly workability, and if the above-mentioned appropriate elastic force cannot be obtained, a good stopping action cannot be achieved, and in extreme cases, a stopping failure may occur during needle alignment. There were drawbacks such as:

As an improved conventional device, a device has been proposed in which a special protrusion or the like for stopping is provided on the wheel train and the stopping action is obtained by engaging the stop lever and the protrusion without using the elastic force of the stop lever. However, this conventional device has drawbacks such as the need to separately provide a special protrusion.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to provide an improved stop for a watch that can obtain good stopping action without applying radial elastic force to the wheel train that is subject to stop control. The purpose is to provide equipment.

In order to achieve the above object, the present invention has a stop protrusion that simultaneously engages with a pair of pinion pinions and gears in a timepiece wheel train that are meshed with each other, and a stop protrusion that supports the stop protrusion and performs hand setting operation. a stop lever that controls the movement of the stop protrusion into a position where the stop protrusion is engaged with the pair of pinion and the gear and a position where the stop protrusion is disengaged in accordance with the movement of the stop protrusion; It is characterized by stopping the rotation of the pinion and gear, which rotate in opposite directions to each other, causing a tension phenomenon with the stopping protrusion to obtain a good stopping action without producing an elastic force in the radial direction of the pinion and gear. I can do it.

In the present invention, the stop protrusion can be a tooth profile having the same module as the pinion and gear that mesh with each other, and the stop protrusion can be molded integrally with the stop lever, or can be rotatably attached to the stop lever. It may also be formed from a supported gear shape.

In the present invention, the operating lever can be engaged with a positioning pin in order to restrict the position where the stop protrusion meshes with the pinion and gear, and this positioning pin allows the stop protrusion to be optimally connected to the pinion and gear. A good meshing state can be obtained.

Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the main parts of the stop device according to the present invention, and shows a state in which the needle setting operation is not performed.

In the embodiment, the rotor pinion 10 and the sixth gear 12 are selected as the pair of pinion and gear in the timepiece wheel train to be stopped.

Although not shown, a well-known rotor is coaxially fixed to the rotor pinion 10, and the rotor and the rotor pinion 10 are driven at a constant speed by an electromagnetic transducer excited by a highly accurate excitation signal obtained from a crystal oscillator or other time reference body. be done.

The constant speed rotation of the rotor pinion 10 is transmitted to the indicator hand via the sixth gear 12 and a well-known timepiece wheel train (not shown), thereby producing a desired time display function.

The characteristic feature of this invention is the rotakana 10 mentioned above.
A stop protrusion 14 is located near the sixth gear 12 and the rotor pinion 1
0 and gear 12 so that they can mesh with and disengage from each other.

In the embodiment of FIG. 1, the stop protrusion 14 consists of a tooth profile integrally formed on the tip of a stop lever 18 which is pivotally supported on a shaft 16. In the embodiment shown in FIG.

The stop lever 18 works in conjunction with the needle setting mechanism to move the stop protrusion 14 carried at its tip into engagement with and disengagement from the rotor pinion 10 and the sixth gear 12.

The needle setting mechanism is a needle setting shaft 2 supported by a bearing plate 20 of the watch.
2, a needle setting pinion 24 is fixed to one end of the needle setting shaft 22, and the needle setting action is performed by engaging or disengaging the needle setting pinion 24 with a transmission pinion 26 which is meshed with the display wheel train. can get.

An engagement groove 28 is provided at the upper end of the needle alignment shaft 22, and by engaging the engagement groove 28 with the locking pin 30 provided at one end of the stop lever 18, the needle alignment shaft 22 is rotated in the axial direction. The movement causes the stop lever 18 to rotate.

A return spring 32 is inserted between the needle setting pinion 24 and the bearing plate 20, and constantly urges the needle setting shaft 22 upward as shown in FIG. 1 to engage the needle setting pinion 24 and the transmission pinion 26. I have been removed.

At the same time, in this state, the stop lever 18 is held at a position rotated counterclockwise about the shaft 16, and as a result, the stop protrusion 14 is held at a position separated from the rotor pinion 10 and the sixth gear 12. .

The first embodiment of the present invention differs from the above configuration, and its operation will be explained below with reference to FIGS. 1 and 2.

FIG. 2 shows a state in which the needle setting shaft 22 is pulled downward in the figure from the state shown in FIG. 1 to perform the needle setting action.

By moving the needle setting shaft 22 downward, the needle setting pinion 24 engages with the transmission pinion 26, and by rotating the needle setting shaft 22, the indicated time can be set to a desired time.

At the same time, the needle setting shaft 22 rotates the stop lever 18 clockwise about the shaft 16, and as shown in FIG. match.

In the illustrated embodiment, this meshing engagement position is determined at a position where the stop lever 18 comes into contact with the positioning pin 34, and the stop protrusion 14 simply meshes with the rotor pinion 10 and the sixth gear 12. The gear 12 is not pushed in the radial direction.

In the meshing state shown in FIG.
The rotation grooves are controlled to stop by the stop protrusion 14, making it possible to reliably stop the rotation of the watch wheel train and the indicator hand.

As described above, in the first embodiment, the rotor pinion 10 and the sixth gear 12 are meshed and stopped at the same time by the stop protrusion 14, and a good stopping action is achieved by tooth profile meshing without using the elastic force of the stop lever 18. It is possible to obtain a good stopping action without applying any radial pressing force to the rotor pinion 10 and sixth gear 12 that are subject to stop control, and without causing true bending or tooth profile deformation. I can do it.

In the embodiment shown in FIGS. 1 and 2, a positioning pin 34 is provided to regulate the stopping position of the stop lever 18 and the stop protrusion 14, but in the present invention, the elastic force of the stop lever 18 can be used. Therefore, even if the positioning pin 34 is removed, a large error will not occur in the meshing state between the stop protrusion 14, the rotor pinion 10, and the gear 12.

FIG. 3 shows another preferred embodiment of the stop protrusion and stop lever suitable for the stop device according to the present invention, in FIG. Consists of a rotatable gear supported on a shaft.

With this gear 14 as well, as is clear from FIG. 2 mentioned above, the pinion and gear that mesh and connect with each other rotate in opposite directions, so by meshing the gear 14 with both at the same time, the pinion and gear can prevent the tension phenomenon. It becomes possible to obtain a good stopping action.

The stop lever 18 in FIG. 3 further includes an elastic portion 38 at one end thereof.
This makes it possible to apply the return force of the needle alignment mechanism without requiring the return spring 32 in the first embodiment.

In addition, in the present invention, the stop protrusion does not have to have a tooth shape, but can also be a protrusion that meshes with the pinion and gear.

As explained above, according to the present invention, it is possible to obtain a good stopping action without any adverse effect on the wheel train mechanism that is subject to stop control, and it is possible to obtain a good stopping action without any adverse effect on the wheel train mechanism that is subject to stop control, and it is possible to obtain a good stopping action without any adverse effect on the wheel train mechanism that is subject to stopping control, and it is possible to obtain a good stopping action without any adverse effect on the wheel train mechanism that is subject to stopping control. This has the advantage that it can be applied to various watches.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main part showing a preferred embodiment of the stop device according to the present invention, Fig. 2 is a plan view showing the state during the needle alignment operation of Fig. 1, and Fig. 3 is a plan view of the stop device according to the present invention. FIG. 7 is a plan view showing the structure of a stop protrusion and a stop lever in another embodiment of the device. 10... Rotor pinion, 12... Sixth gear, 14... Stop protrusion, 18... Stop lever, 34... Positioning pin .

Claims (1)

[Scope of utility model registration request] A stop protrusion that simultaneously meshes and engages a pair of pinions and gears in a clock wheel train that are meshed with each other; A stop device for a watch, including a stop lever that controls movement between a position where it engages with a gear and a position where it disengages.