JPS5819512Y2 - switch mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch mechanism, and more particularly to a switch mechanism that switches the open or closed state of an electric circuit by rotating a rotating shaft.

Conventionally, a switch mechanism that switches between an open or closed state immediately at the beginning of rotation of a rotating shaft and maintains the switched state even with subsequent rotations is conventionally formed concentrically on a printed circuit board. A non-conductive portion is formed in a part of one of the two conductive portions, and the non-conductive portion is coupled to the rotating wheel.
A movable contact piece is provided with two contacts that are always in sliding contact with one conductive part, and when one contact is on the non-conductive part, it is in an open state, and in other rotational positions, it is in a closed state. Switch mechanisms configured to last are known.

However, in such a switch mechanism, the movable contact piece is directly connected to the manually rotated rotating wheel, so if vibration or shock is applied to the rotating shaft, the movable contact piece will also vibrate. However, the disadvantage is that the electrical connection becomes extremely unstable.

In particular, this is an example of using the above-mentioned switch in a sleeve timer mechanism of a clock device, which rotates a disc that is flexible in the axial direction and has a protrusion around the periphery that engages with a gear that interlocks with the clock mechanism. integrally formed on a moving shaft, a movable contact piece is formed on the rotary ring, a conductive part and a non-conductive part are concentrically formed at positions corresponding to the contacts of the movable contact piece, and the movable contact piece is in an open state at a stop position; The rotation shaft is manually rotated against the engagement force between the gear and the protrusion, and the sleeve timer is set for a predetermined period of time. At the same time, the contacts are closed, and as the gear rotates, the gear becomes protruding. In a sleeve timer mechanism in which the rotary wheel sequentially engages with the protrusion and then returns to its original position to open the contact, when the rotary shaft is rotated against the engagement force between the gear and the protrusion mentioned above, the disk is rotated. Each time the switch is bent and disengaged, the movable contact piece vibrates greatly, making the connection between the contacts extremely unstable, which has the disadvantage of adversely affecting the electrical equipment controlled by the switch. .

In view of the above-mentioned drawbacks, this invention manually rotates the rotation axis,
After the connection state between the contacts is changed, the contact between the rotary shaft and the movable contact piece is cut off, so that vibrations applied to the rotary wheel will not affect the connection state between the contacts. The aim is to provide a stable switch mechanism that does not cause any damage.

The present invention will be explained in detail below based on the drawings.

Fig. 1 and Fig. 2 show the sleeve timer mechanism of the present invention in a clock device, that is, the electric circuit is closed by setting an arbitrary time by the rotation angle of the manual operation shaft, and the initial position is set in conjunction with the clock mechanism. FIG. 2 is a front view and a plan view, with some parts omitted, of an embodiment used in a sleeve timer mechanism, which is configured to open an electric circuit by rotating and returning.

Reference numeral 1 indicates a main shaft which is rotated at a constant speed by a clock driving source (not shown) and is connected to a minute display member (not shown), 2 is a pinion fixed to the main shaft 1, and 3 is a time display which is pivotally supported by the main shaft 1 to display the time. At this time, there is a gear 3a on the side of the display member 3.
is fixed.

4 is a reduction gear in which a large gear 4a that meshes with the pinion 2, a pinion 4b that meshes with the gear 3a of the time display member 3, and a pinion 4C that connects with a 24-hour timer mechanism (not shown) are integrally formed; is the shaft part 5 which is manually rotated.
a, and a disc 5C having flexibility in the axial direction of the shaft portion and having a plurality of protrusions 5b around the periphery that can engage and disengage each tooth of the large gear 4a of the reduction gear 4. , a cam portion 5 that rotates integrally with the shaft portion 5a and has a convex portion 5f and a concave portion 5e.
d and a pin 5g that rotates together with the shaft portion 5a on an arc having a radius larger than that of the cam portion 5d and is disposed near the convex portion 5f of the cam portion 5d. be.

Reference numeral 6 denotes a bent portion 6a on which the cam member 5d or pin 5g comes into contact and swings, and a support portion 6d that swingably supports the cam member 5d or pin 5g.
Two protruding contacts 6 arranged at substantially symmetrical positions with respect to the
b, a movable contact piece 6C is formed, and 7 is a conductive part 7a with which the contact 6b of the movable contact piece 6 is always in contact regardless of its swinging position, and when the movable contact piece swings (second A printed circuit board is formed with a conductive part 7b that can come into contact with the switch actuating member 5 and the movable contact piece 6 (indicated by the dotted chain line), and 8 is a lid that covers the contact section of the switch described above. be.

The conductive part formed on the printed circuit board is connected to an electric device (not shown) controlled by this sleeve timer mechanism, and the conductive part formed on the printed circuit board is connected to other switches (not shown). is also formed.

The engagement force between the protrusion 5b manually provided around the disk 5C and the large gear 4a of the reduction gear 4 which rotates in conjunction with the clock mechanism, when the switch actuating member 5 is in the stop position as shown by the solid line in FIG. 2. When rotated by a predetermined rotation angle against As the pin 5g retreats as it rotates, it is pushed up by the convex portion 5f of the cam portion 5d and rotates to the right, as shown in FIG.
The contact 6b of the movable contact piece 6 is connected to the conductive part 7a of the printed circuit board 7.
The other contactor 6C slides from the non-conductive part on the printed circuit board 7 to the conductive part 7b and connects the two conductive parts 7a and 7b.

Even if the switch operating member 5 continues to rotate, the movable contact piece 6 remains in that position due to the friction of the contacts 6b, 6C, etc., and the switch operating member 5 is rotated without making any contact with the cam portion 5d. .

Switch actuation member 5 manually rotated by a predetermined angle
The convex portion 5b provided on the disc 5C sequentially engages with the gear 4a interlocking with the clock mechanism and begins to return to the stop position shown in FIG. 3a, and the switch actuating member 5 rotates clockwise to the stop position. When approached, the pin 5g comes into contact with the bent portion 6a of the movable contact piece 6,
While rotating the movable contact piece 6 to the left, the bent portion 6a is rotated to the cam portion 5d.
By falling into the recess 5e of the movable contact piece 6, the contact 6C is detached from the conductive part 7b by turning the movable contact piece 6 to the left, and the contact 6C is separated from the conductive part 7b.
At the same time, the connection between the large gear 4a of the reduction gear 4 and the protrusion 4b of the disc 5C is also broken, and the switch actuating member returns to the stop position.

Although not shown, there is a stopper to prevent the bent portion 6a of the movable contact piece 6 from turning beyond the rotation range of the pin 5g, and a stopper to determine the stop position of the switch actuating member 5 and to regulate the rotation angle. Needless to say, a stopper is provided.

The present invention is not limited to an embodiment of the switch mechanism used in the sleeve timer mechanism of a clock device as described above, but even if it is used as a switch mechanism that opens and closes an electric circuit by simple manual rotation, the operation and effect are exactly the same. be.

As described above, according to the present invention, the switch actuating member 5
When the switch is rotated to close the switch, the switch actuating member 5 and the movable contact piece 6 are completely separated, so vibrations or shocks applied to the switch actuating member 5 are transferred to the movable contact piece 6 It has the advantage that it is not transmitted at all and has no effect on the contact state of the contacts.

[Brief explanation of the drawing]

Figures 1 and 2 are front and plan views showing embodiments of the present invention, respectively, and Figures 3a and 3 are explanatory diagrams showing the operation of the main parts of the present invention in an enlarged manner. . 5...Switch operating member, 5a...Shaft portion, 5b...Protrusion, 5C...Disc plate, 5
d...Cam part, 5e...Recessed part, 5f.
...Protrusion, 5g...Pin, 6...
・Movable contact piece, 6a...Bending part, 6b, 6C・
...Contact, 6d...Support, 7...
. . . Printed circuit board, 7a, 7b . . . Conductive part.

Claims (1)

[Scope of utility model registration request] a pair of contacts, a movable contact piece having a bent portion formed at one end and supported so as to be swingable; a rotating shaft disposed near the bent portion of the movable contact piece; A convex portion that is fixed to the bending portion and enters a part of the swinging range of the bending portion contacts one surface of the bending portion when the rotating shaft rotates in the negative direction, thereby keeping the movable contact piece constant. a cam part that rotates in the - direction by an angle of , then breaks contact with the movable contact piece and rotates further; a pin that rotates the movable contact piece in another direction by contacting the other surface of the bent portion of the movable contact piece at a position where the movable contact piece is rotated by a certain angle in the negative direction; It is characterized by comprising a printed circuit board on which at least two conductive parts are formed, which are arranged in a position where the pair of contactors are brought into contact with each other and short-circuited in a position where the movable contact piece is rotated in the negative direction. switch mechanism.