JPH0113612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch used in a watch or the like.

[Conventional technology]

Conventionally, for example, switches that adjust the display of the advance or lag of an electronic digital clock (timing) include:
The central contact portion of two contact plate plates arranged in parallel in the direction intersecting the cam is brought into elastic contact with each of the two types of tooth portions having different phases on the outer circumference of the cam provided on the reuse stem,
The structure is such that each contact opens and closes with a slight lag, thereby generating two pulse signals with different phases depending on the direction of rotation of the reuse stem, thereby correcting the advance or lag of the clock. There is.

[Problem to be solved]

However, because the contact piece intersects with the cam, it requires a large amount of space vertically and horizontally, and there are certain limits to making the watch smaller and thinner.

Therefore, an object of the present invention is to provide a smaller and thinner switch.

[Means to solve the problem]

A feature of the present invention is that a cam provided at one end of the reuse has a plurality of teeth formed at regular intervals on the outer peripheral surface, and a projecting piece is engaged with the cam to form a swingable contact piece. is formed with a central elastic arm, and a first elastic arm and a second elastic arm on both sides of the central elastic arm, spaced apart from each other by a certain distance, and
First and second stoppers are provided on the outer sides of both elastic arms, respectively, and the first and second stoppers come into elastic contact with the corresponding first and second elastic arms to push the contact piece. A first contact portion is provided between the central elastic arm portion and the first elastic arm portion so that the central elastic arm portion and the first elastic arm portion can respectively contact each other. , a second contact portion is provided between the central elastic arm portion and the second elastic arm portion so that the central elastic arm portion and the second elastic arm portion can respectively contact each other; The positional relationship between the contact part and the second contact part is such that when the Reuse is rotated in the forward direction and the contact piece is swung in one direction at a certain angle, the central elastic arm first comes into contact with the second contact part. Then, when the use is further rotated in the forward direction and the contact piece is further rotated in one direction, the first elastic arm portion comes into contact with the first contact portion, and when the use is rotated in the opposite direction, the contact piece is further rotated in one direction. When the piece is swung at a certain angle in the other direction, the central elastic arm first comes into contact with the first contact part, and when the relay is further rotated in the opposite direction and the contact piece is further rotated in the other direction, the above-mentioned The second elastic arm is the second elastic arm.
It is located where it comes into contact with the contact part.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

1 and 2, a reuse stem 2 is rotatably supported on one side of a support 1, and a circuit board 3 is fixedly attached to the upper surface of this support. A contact piece 4 is attached to the upper surface of one side of the circuit board 3 near the reuse stem 2 so as to be swingable about a shaft 5. The shaft 5 is made of metal and is electrically connected to a conductive part (not shown) provided on the circuit board 3.

The contact piece 4 is disposed along the axis of the rear stem 2, and the shape of this contact piece includes a protruding piece 4a that protrudes toward the tip of the rear stem 2 at one end (right end). At the other end (left end), three arm sections, ie, a central elastic arm section 4b, a first elastic arm section 4c, and a second elastic arm section 4d, are integrally formed in an extended state. As shown in FIG. 3, a cam 6 is formed at the tip of the reuse stem 2, and the teeth 6a, 6b of the cam can engage with the projection 4a.

Therefore, by turning the crown 7 fixed to the other end of the crown 2, the contact piece 4 can be moved to the protruding piece 4a.
It swings about the shaft 5 through the.

The other end of the contact piece 4 is shaped like a fork.
The distal end portion of the central elastic arm portion 4b is slightly wider. Further, each of the first and second elastic arm portions 4c and 4d is formed extremely thin to provide sufficient spring force.

The outer surfaces of the tips of the first and second elastic arms 4c and 4d are in pressure contact with the first stopper pin 8 and the second stopper pin 8a, respectively, which are implanted in the circuit board 3. is stably held in the neutral position. To attach the contact piece 4, after attaching the contact piece to the circuit board 3 with the shaft 5, bend each elastic arm part 4c, 4d inwardly and align the outer surface of the tip part with the solid line in Figure 1. As shown, this is done by contacting the inner surfaces of the first and second stopper pins 8, 8a.

Further, a first shaft-shaped contact portion 9 is provided between the central elastic arm portion 4b and the first elastic arm portion 4c, and a second shaft-shaped contact portion is provided between the central elastic arm portion and the second elastic arm portion 4d. 10
are provided protrudingly on the circuit board 3, and each of the contact portions 9, 10 is electrically connected to a conductive portion formed on the upper surface of the circuit board 3.

The first contact section 9 can be contacted by the central elastic arm section 4b and the first elastic arm section 4c, and the second contact section 10 can be contacted by the central elastic arm section 4b and the second elastic arm section 4.
d can be contacted.

And the contact piece 4, the first contact part 9, and the second contact part 10
The relationship is as follows.

In FIG. 1, when the Reuse 7 is rotated in the direction of the arrow and the contact piece 4 is swung clockwise at a certain angle about the shaft 5, the central elastic arm 4b first
The second elastic arm portion 4d is configured to contact the second contact portion 10 by contacting the contact portion 9 and then further swinging the contact piece 4 in a clockwise direction via the reuse 7. Similarly, when the reuse 7 is rotated in the counter-arrow direction and the contact piece 4 is swung at a certain angle counterclockwise, the central elastic arm 4b first comes into contact with the second contact part 10, and then the contact piece 4 is further moved. By shaking it counterclockwise, the first elastic arm portion 4c moves to the first contact portion 9.
It is constructed so that it comes into contact with the

Next, the operation of the present invention will be explained.

When adjusting the progress of the clock, press Reuse 7 first.
When rotated in the direction of the arrow in the figure, the protruding piece 4a of the contact piece 4 is pressed against the teeth 6a of the cam 6 in the direction of the arrow.
This contact piece swings clockwise around the shaft 5. As a result of this rocking, the tip of the central elastic arm 4b first comes into contact with the first contact part 9 to close the switch, and when the contact piece 4 is further rocked clockwise via the reuse 7, it is slightly more After a delay, the tip of the second elastic arm portion 4d contacts the second contact portion 10 and the switch is closed. At this time, the first elastic arm portion 4c
As shown by the chain line in the figure, the center part bends outward.
As the rotation of the cam 6 progresses, the protruding piece 4a eventually comes off the toothed portion 6a and engages with the succeeding toothed portion. As a result, the contact piece 4 reliably returns to its original position not only by the spring force of the first elastic arm part 4c but also by the spring force of the central elastic arm part 4b, and at the same time, the second elastic arm part 4d moves away from the second contact part 10. apart, the central elastic arm portion 4b is
Away from the contact portion 9, the contact piece 4 is held in a neutral position and each switch is opened.

When the revolver 7 continues to rotate further, the central elastic arm 4b and the second elastic arm 4d repeatedly make contact with the corresponding contact portions 9 and 10 with a constant phase difference. It opens and closes repeatedly. As a result, pulse signals having mutually different phases are generated as shown in FIG. 4 P1 and P2, and the advance of the clock is corrected by these pulse signals.

Also, when correcting the delay of the clock, rotate the crown 7 in the opposite direction of the arrow in Figure 1, and the contact piece 4
rotates counterclockwise, first the central elastic arm 4b contacts the second contact 10, and then a little later the first elastic arm 4c contacts the first contact 9, rotating this reuse. If this continues, the contact of the first elastic arm portion 4c with the first contact portion 9 will always be the same as that of the second elastic arm portion 4c.
Since there is a slight delay from the contact of the central arm portion 4b with the contact portion 10, pulse signals such as those shown at P3 and P4 in FIG. 5 are generated, thereby correcting the delay of the clock. In this case, the center of the contact piece 4 is reliably returned by the spring force of the second elastic arm 4d and the central elastic arm 4b.

〔effect〕

As explained above, according to the present invention, the switch can be repeatedly opened and closed with a phase difference of a predetermined interval by the rotation of the crown, and the first and second elastic arms are used not only to open and close the switch, but also to open and close the switch. , the contact piece is held in a neutral position by cooperation with the first and second stoppers, and the projecting piece of the contact piece is engaged with the cam to swing the contact piece around the shaft. Since the switch is configured to open and close using the switch, the number of parts is reduced and the space occupied by the contact piece is small, making it possible to provide a smaller and thinner switch, and the shape of the contact piece and cam is also simple. Therefore, the structure is simple and manufacturing is easy, which has great effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a partially sectional front view, FIG. 2 is a sectional view along the line of FIG. 1, and FIG. 3 is an enlarged sectional view along the line of FIG. 2. The figures omitting the support, FIGS. 4 and 5, are pulse signal waveform diagrams. 3... Circuit board, 4... Contact piece, 4a... Projection piece,
4b...Central elastic arm part, 4c...First elastic arm part,
4d... second elastic arm section, 5... shaft, 6... cam,
6a, 6b...Cam teeth, 7... Reuse, 8
...First stopper, 8a...Second stopper,
9...First contact portion, 10...Second contact portion.

Claims (1)

[Scope of Claims] 1. A reuse that is rotatably provided; a cam that is provided at one end of the reuse and has a plurality of teeth formed at regular intervals on its outer peripheral surface; and a cam that is swingably supported. a contact piece that has a protrusion that can engage with the teeth of the cam at one end thereof and that swings in conjunction with the rotation of the reuse via the cam and the protrusion; a first elastic arm and a second elastic arm, which are provided on the contact piece at regular intervals on both sides of the central elastic arm; and the first and second elastic arms. first and second stoppers, which are respectively provided on the outside of both of the elastic arms, and which come into elastic contact with the corresponding first and second elastic arms to hold the contact piece in a neutral position; and the central elastic arm. and the first elastic arm, the central elastic arm and the first elastic arm being able to contact each other; a first contact between the central elastic arm and the second elastic arm; and a second contact portion provided between the elastic arm portion and the central elastic arm portion and the second elastic arm portion, respectively, the first contact portion and the second contact portion of the contact piece. The positional relationship with the second contact part is such that when the reuse is rotated in the forward direction and the contact piece is swung in one direction by a certain angle, the central elastic arm first comes into contact with the second contact part, and the reuse is rotated. When the contact piece is further rotated in the same direction, the first elastic arm portion comes into contact with the first contact portion, and the reuse is rotated in the opposite direction to swing the contact piece in the other direction at a certain angle. When the central elastic arm is moved, the central elastic arm first comes into contact with the first contact, and when the reuse is further rotated in the same direction and the contact piece is further rotated, the second elastic arm comes into contact with the second contact. A switch characterized by being in contact with.