JP2646014B2 - Time switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time switch, and more particularly, to a time switch that can be operated by pushing or pulling a spindle.

[Conventional technology]

There is a type in which a push-pull main shaft is provided, and a switch is activated by, for example, pushing the main shaft, and the switch is returned by a cam after a predetermined time has elapsed (see, for example, Japanese Utility Model Application Publication No. No. 21936, Japanese Utility Model Publication No. 63-26900).

[Problems to be solved by the invention]

In this conventional time switch, even after the predetermined time has elapsed and the switch is returned, the spindle is still being pushed, so that it is necessary to prepare for the next operation. There is a problem that requires a troublesome operation of pulling back the main shaft by hand.

The present invention has been made in view of the above points, and an object of the present invention is to form a neck portion on a main shaft to which a biasing force toward a return position is applied and freely engage and disengage the neck portion. By providing the connecting piece, the switch is operated only by pushing or pulling the spindle, the return of the spindle is prevented, and the operation of the switch is maintained. At the same time, and when the predetermined time has elapsed, the switch can be returned at an accurate time, and in this case, the spindle can be automatically returned to the ready position. It is.

[Means for solving the problem]

In order to achieve the above object, the present invention employs the means described in the claims, and the operation is as follows.

[Action]

When the main shaft is moved in the axial direction to the operating position, the engaging portion of the connecting piece falls on the neck of the main shaft. As a result, the switch is activated and the return of the spindle to the ready position is prevented. After a lapse of a predetermined time, the movable member of the switch is forcibly operated by the protrusion of the cam, and the switch returns. Further, the engaging portion of the connecting piece is pulled out of the neck by the movement of the movable member, and the main shaft returns to the ready position.

〔Example〕

Hereinafter, drawings showing an embodiment of the present application will be described. First
In the figure, reference numeral 1 denotes a case, which is composed of a main body 2 and a cover 3 attached to the main body. Reference numeral 4 denotes a column integrally formed with the main body 2. Reference numeral 5 denotes a main plate attached to the support 4. The main plate and the main body 2 constitute a base frame of the timer. Reference numeral 6 denotes a main shaft, which is mounted so as to be rotatable with respect to the main body 2 and the main plate 5 and to be able to advance and retreat in an axial direction between an operation position indicated by a solid line and a preparation position indicated by an imaginary line. The main shaft 6 is biased toward the preparation position. That is, reference numeral 7 denotes an urging spring, which uses a compression coil spring, and is interposed between a spring support 8 formed on the main plate 5 and a spring support pin 9 fixed to the main shaft 6. Reference numeral 10 denotes a neck formed at a part near the rear end of the main shaft 6. Reference numeral 11 denotes a cam drive pin fixed to an intermediate portion of the main shaft 6. Next, reference numeral 12 denotes a cam driving gear rotatably mounted on the main body 2, which is concentric with the main shaft 6. Reference numeral 13 denotes a transmission provided on the gear 12, to which the cam drive pin 11 is fitted. The conductor 13 is formed to be long in the axial direction of the main shaft 6 as shown, so that the pin 11 does not come off even when the main shaft 6 advances or retreats. Next, 14 is a clock mechanism,
As an example, it is composed of a timer motor 15 and a reduction gear 16 for reducing its rotation and transmitting it to the gear 12.

Next, reference numeral 18 denotes a program cam, which comprises a number of cams 19 stacked in a multilayer. The cam 18 is biased so as to be able to rotate integrally with the main shaft 6 with a slight play in the rotation direction. That is, as shown in FIG. 2, a fitting concave portion 22 is formed in the boss portion 21 of the cam 18, and the cam driving pin 11 is located there. The recess 22 is the main shaft 6
The pin 11 is formed long in the axial direction of the
Are not detached from the concave portion 22. Next is 23 cam
A quick cam 24 integrally formed with 18 is a quick lever pivotally connected to the main plate 5 and is brought into contact with the cam 23 with a large urging force. Reference numeral 25 denotes a sub cam provided side by side with the program cam 18 and is constituted by a multi-layered cam 19 like the program cam 18. The sub-cam 25 has a gear 25a, and the sub-cam 25 is moved from the reduction gear 16 to the gear 12a.
The rotation power is received in a different system from that of the cam 18 so as to rotate separately from the cam 18. Are a number of switches, which are provided adjacent to the respective cams 19 of the program cam 18 and the sub cam 25. In FIGS. 4 and 5, reference numeral 19a denotes one of the plurality of cams 19, 19b denotes a projection for operating a switch provided on the cam 19a, and an operation described later is performed. It is formed at a height that can be reached. Reference numeral 26a denotes one switch provided adjacent to the cam 19a among the many switches.
In this switch 26a, reference numeral 27 denotes a fixed contact plate,
It is received by 8 and its positioning is done. Two
Reference numeral 9 denotes a movable contact plate shown as a movable member, which can freely contact and separate from the contact plate 27, and has a biasing force toward the cam 19a. Reference numeral 30 denotes a follower attached to the movable contact plate 29. Next, reference numeral 32 shown in FIGS. 1, 4, and 5 denotes a connecting piece, which is configured so that the main shaft 6 can reciprocate in the radial direction. That is, as shown in FIG. 5, the guide piece 33 provided on the connecting piece 32 is located in the guide hole 33a formed in the base plate 5 in the radial direction of the main shaft 6, and the connecting piece 32
Is guided in the above-mentioned direction. One end 34 of the connecting piece 32 is a movable contact plate as shown in FIG.
It is linked to 29 so that it can move together. That is, the one end 34
Is formed in a forked shape, and the contact plate 29 is located between one piece 34a and the other piece 34b. The other end 35 of the connecting piece 32 is an engaging portion, and is in contact with the main shaft 6. An auxiliary spring piece 37 urges the connecting piece 32 toward the main shaft 6. Reference numeral 38 shown in FIG. 3 indicates a knob attached to the front end of the main shaft 6, and has a pointer 38a. Numeral 39 is a display showing various operations written on a panel of a washing machine as an example of an apparatus using this time switch.

Next, the operation of the time switch having the above configuration will be described with reference to FIGS. When the pointer 38a is at the position as shown in FIG. 3, the cam 19a is in a state as shown in FIG. 4 (a). At this time, the spindle 6 is in the ready position as shown in FIG.
Is in a return state, for example, an open state as shown.
In this state, when the main shaft 6 is pushed to reach the operating position, the connecting piece 32 is moved to the movable contact plate 29 and the auxiliary spring piece 37.
5A, the engaging portion 35 which has been in contact with the large diameter portion 6a of the main shaft 6 as shown in FIG. . Thereby, as shown in FIG. 4 (b), the contact 29a of the movable contact plate 29 comes into contact with the contact 27a of the fixed contact plate 27, and the switch 26a is turned on, that is, turned on. By the conduction of the switch 26a,
The timer motor 15 is supplied with electricity and starts rotating. The rotating power is reduction gear 16, gear 12, transmission 13, cam drive pin
The rotation is transmitted to the cam 18 via 11 and the cam rotates. In this state, the main shaft 6 is prevented from returning to the ready position by the urging force of the spring 7 by the engaging portion 35 that has fallen into the neck portion 10, and the state of being pushed into the operating position is maintained. As a result, the switch 26a is also kept closed. In this state, the switches 26 driven by the respective cams 19 open and close or switch in response to the rotation of the program cams 18, and in the case of an electric device using the time switch, such as a washing machine, washing, draining, dehydrating, rinsing, etc. Are sequentially performed. During this operation, the knob 38 shown in FIG. 3 rotates in the direction of the arrow, and the pointer 38a sequentially indicates a working stroke. When this state continues and shortly before the lapse of the predetermined time, the cam 19a becomes a state as shown in FIG. 4 (c). When a predetermined time elapses (when the main shaft 6 makes one rotation and the pointer 38a reaches the position shown in FIG. 3), the cam 19a is in a state as shown in FIG. By pressing
The movable contact plate 29 is forcibly separated from the fixed contact plate 27, and the switch 26a is opened. As a result, the motor 15 of the clock mechanism 14 stops. When the movable contact 29 is separated from the fixed contact plate 27 as described above, the movable contact plate 29
By pressing the piece 34b in the above, the connecting piece 32 moves in the direction shown by the arrow, and the engaging portion 35 is pulled out from the neck 10 as shown in FIG. 5 (d). Then, the main shaft 6 returns to the ready position by the urging force of the spring 7. Note that the switch is
After the opening 26a, the cam 18 is slightly rotated by the quick mechanism. That is, in FIG.
Kicking the kick slope 23a of the quick cam 23 causes the cam 18 to be slightly rotated in the direction of the arrow, resulting in a state as shown in FIG. 4 (a). At this time, the follower 30 comes off the projection 19b. However, the engaging portion 35 of the connecting piece 32 comes into contact with the large diameter portion 6a of the main shaft 6, and the movable contact plate 29 is connected to the piece 34a
And the movement to the fixed contact plate 27 side is prevented, and the switch 26a is kept open.

Although an example has been described above in which the spindle 6 is pushed to reach the operating position, the spindle may reach the operating position by a pulling operation. In that case,
The biasing direction of the main shaft 6 applied by the biasing spring 7 is opposite to that described above, and the neck portion 10 and the large diameter portion 6a adjacent thereto are provided.
May be interchanged with each other. Furthermore, switch 26
Although a has been described with reference to an example in which the closed state is the operating state and the open state is the returning state, the switch may be such that the opening state is the operating state and the closing state is the returning state. Such switches consist of contact plates 27 and 29
May be interchanged with each other.

〔The invention's effect〕

As described above, according to the present invention, in the case of starting, the spindle 6
Is moved in the axial direction toward the operating position, so that the other end 35 of the connecting piece 32 falls down and engages with the neck 10 of the main shaft 6. Operating the switch 26a; (b) preventing the return of the main shaft 6; and (c) maintaining the dip state of the other end 35 by preventing the return of the main shaft 6, whereby the operation of the switch 26a is performed. There is an effect that three things of maintaining the state can be simultaneously performed.

Moreover, even when the operation state of the switch 26a is maintained as described above, when a predetermined time has elapsed in the operation state of the switch 26a, the protrusion 19b of the cam 19a
Thus, there is an effect that the switch 26a can be forcibly returned at an accurate time.

Moreover, at this time, when the movable member 29 of the switch 26a is moved, the other end 35 is pulled out of the neck 10 so that the main shaft 6 is pulled out of the neck 10 by being pulled out.
Has the effect of returning to the preparatory position and being ready for the next start-up, as well as preventing the connecting piece 32 from moving by the main shaft 6 returning to the preparatory position and preventing erroneous re-operation of the switch 26a. There is also an effect.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a time switch partially shown by a block, and FIG.
FIG. 3 is a front view of the knob and operation display, and FIG.
FIG. 5 is a plan view for explaining the operation, and FIG. 5 is a cross-sectional view for explaining the operation, showing the relationship between the main shaft, the connecting piece, and the switch. 6 ... spindle, 10 ... neck, 14 ... clock mechanism, 19a ... cam, 26a ... switch, 32 ... connecting piece.

Claims (1)

(57) [Claims] A main shaft which is rotated by a clock mechanism is provided with a cam having a projection for operating a switch, and is operated adjacent to the cam by the projection. In the time switch including the switch having the movable member, the main shaft is configured to be able to advance and retreat between the preparation position and the operating position in the axial direction, and is biased toward the preparation position. In addition, a neck portion is provided on a part of the main shaft, while one end of a reciprocally movable connecting piece is connected to the movable member so as to be integrally movable,
The other end is provided at a position where the main shaft contacts the large-diameter portion of the main shaft when the main shaft is at the ready position, and when the main shaft is moved to the operating position, the main shaft comes into contact with the neck portion. A time switch in which the height of the protrusion is set to a height sufficient to operate the movable member of the switch and to pull out the other end of the connecting piece from the neck.