JPS5831292Y2 - Switch mechanism for electronic watches - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a switch mechanism for an electronic circuit such as an electronic wristwatch.

Conventionally, this type of switch mechanism has had the disadvantage that it cannot be easily constructed because it combines a large number of electrical circuits and has too many mechanical members.

In this invention, a switch mechanism that uses the rotation of a winding stem, etc. in an electronic watch to produce two types of results depending on the direction of rotation can be easily implemented by using a single switch spring that is insulated from the surroundings. It has been made possible.

In an electronic wristwatch, a signal S is input to input A or input B of a predetermined electronic circuit IC by an external operation, as shown in FIG.
This is a mechanism for inputting to input A or input B depending on the direction of rotation of the winding stem when the winder is turned on.In particular, in this invention, the switch spring 1, which is a conductor, is attached to the pin 2 as shown in the sectional view shown in FIG. It is driven and fixed to the circuit board 3.

This switch spring, together with the pin 2, is insulated from the surroundings on the circuit board 3.

In addition to this, there is a correction wheel in which the pawl 4 and cam 5 are integrated in the winding stem 6.

And this modified car is designed to mesh with Tsuzumi car 7.

Further, FIG. 3 shows the line AA' in FIG. 2, and the input terminal 8 is drawn to show the relationship with the switch spring 1.

Here, the positional relationship between the cam 5 and the claw 4 is such that they are integrated at a relative angle as shown in FIGS.

In addition, Fig. 4 shows the switch spring 1 from the direction of arrow B in Fig. 3.
In the diagram showing the positional relationship of input terminal 8 and pin 2, gaps g1 and g2 between spring 1 and input terminal 8 are input terminal 8, respectively.
Adjustment can be made by using eccentric pins etc. for A and 8B respectively.

Here, it is assumed that the signal S in FIG. 1 is always energized to the conductor winding stem 6 or the conductor ground plate 9, and is connected to, for example, the positive or negative pole of the internal battery.

Further, since the braking presser spring 10 of the cam 5 is fixed in a conductive state to the base plate 9, the signal S is always applied.

Here, the tip 10A of the presser spring 19 with the initial deflection of the fixing pin 11 of the presser spring 10 is separated from the valley 5A of the cam 5.

Both the guide rim 5 and the claw 4 are conductors.

The structure of the present invention is as described above, and its operation will be explained next.

First, when the winding stem 6 is turned, the correction wheel engaged with the tension wheel 7 does not turn, but the cam 5 comes into contact with the presser spring 10, and when the cam 5 is turned further, the switch spring 1' is caught on the protrusion 4A of the pawl 4, and the signal S
from the winding stem 6 or main plate 9 to the presser spring 10, cam 5 pawl 4
and is transmitted to switch spring 1.

If it rotates further here, it comes into contact with the input terminal 8 on the circuit board 3, and is transmitted from the input terminal 8 to the circuit from the pattern on the circuit board.

At this point, when the tip 5A of the cam 5 passes the tip 10A of the presser spring 10, the correction wheel is naturally rotated by the spring force of the presser spring 10 and returns to its original position.

At this time, even if the switch spring 1 and the claw 4 are unlatched and come into contact with another input terminal, the switch spring 1 is insulated from the surroundings and the mechanism is such that the signal S is always transmitted through the ratchet 4, so a malfunction will occur in this case. I don't.

If it rotates in the opposite direction, it will be transmitted to another input terminal.

Furthermore, even if the switch spring 1 comes into contact with the input terminal 8 due to some external impact, the signal S will not be transmitted and no malfunction will occur because it is not in contact with the claw 4.

Furthermore, even if the correction car rotates naturally, the presser spring 1
Unless the rotational force is applied above a predetermined value determined by the elasticity of 0, the pawl 4, the switch spring 1, and even the input terminal 8 will not come into contact with each other, making it safe.

As described above, according to this invention, a claw electrically connected to a human signal source is rotated by an external operation, and a single electrically insulated switch spring is hooked and bent. By making one of the two input terminals placed on the left and right sides of the switch spring contact momentarily, it is possible to select which input terminal to send the input signal to depending on the direction of rotation, and it is easy to use. The switch mechanism provides a switch mechanism for an electronic watch with a snap effect.

Furthermore, since the correction wheel that operates the switch spring is configured to forcibly rotate once and return to its original position based on its operation, it is also possible to open and close the switch continuously by deflecting the switch spring in the same direction. , it is suitable as a switch mechanism for extracting various switch signals.

In particular, this invention has a small number of parts, less malfunctions, and can obtain two types of switching effects depending on the direction of rotation, making it a truly useful invention that can be used as a single-pole, double-throw changeover switch for this type of electronic watch. There is.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing an example of the usage state of this invention, Figure 2
3 is a sectional view taken along the cross section of FIG. 2, and FIG. 4 is a schematic plan view of the essential portion of FIG. 3. 1...Conductor switch spring, 2...Pin, 3...Circuit board, 4...Claw, 5...
...cam, 6... winding stem, 7...
Tsuzumi car, 8.8A, 8B... Input terminal, gl
, g2... Clearance between spring 1 and input terminals 8A and 8B, 9... Base plate, 10... Holder spring, 11... Holder spring fixed. Pin, S...
···signal.

Claims (1)

[Scope of utility model registration request] A switch spring whose one end is fixed and whose tip is deflectable left and right and parallel to the winding stem axis; an input terminal provided on both sides of the tip of the switch spring so as to be in contact with each other when the switch spring is deflected; In the switch mechanism, the correction wheel is provided on the winding stem shaft and operates in conjunction with the rotation of the winding stem to open and close the switch by deflecting the winding stem from side to side. a claw for deflecting the tip to either the left or right; and the claw deflects the switch spring to apply a rotational force in the same direction as the rotational direction when the switch spring comes into contact with either of the input terminals. A switch mechanism for an electronic timepiece, comprising a heart-shaped cam that is integrally formed on the winding stem shaft and receives the action of a pressing spring that forcibly rotates once to restore the position of the pawl to a non-contact state.