JPS62127Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clockwork type time switch that allows the return speed of the main shaft to be selectively controlled to be as slow as desired.

Traditionally, clockwork time switches have the characteristic that the return speed of the main shaft is constant because the mainspring, which is the driving source, generates a nearly constant torque. Therefore, there is a problem in that a complicated mechanism must be added to control the slow speed. but,
Nowadays, home appliances sold by home appliance manufacturers, including electric washing machines and microwave ovens, are required to be equipped with a clockwork time switch that can control the slow return speed.

Therefore, the present invention aims to provide a clockwork type time switch that can perform slow speed control of the main shaft in accordance with the above-mentioned requirements, and whose control mechanism can be configured with an extremely simple mechanism.

1 to 5 showing embodiments of the present application will be described below. Reference numeral 1 indicates a case, in which reference numeral 2 is a substrate on which a cover 2' can be attached, and 3 and 3' are base plates arranged in parallel with appropriate intervals as is well known. It is fixedly attached to the substrate 2 via a connecting fixing column 4. Next, 5 is a main shaft rotatably attached to the case, 6 is a mainspring as a driving source, and as is well known, one end is fixed to the main shaft 5 and the other end is fixed to the base plate 2. 5 is configured to store a biasing force for return. 7 is a timer cam mounted loosely on the shaft end of the main shaft 5; 8 is a cam fixedly mounted on the main shaft 5;
An engaging claw 8' extending from the cam 7 is inserted into an elongated hole 9 formed in the cam 7, so that the timer cam 7 rotates in conjunction with the rotation of the main shaft 5. .
Further, the engagement pawl 8' engages with the elongated hole 9 in a loose manner so that a well-known play in the direction of rotation of the cam 7 with respect to the main shaft 5 is formed. Reference numeral 10 denotes a driven portion 1 that is in contact with the outer periphery of the timer cam 7.
1a and an actuating portion 11b that faces the switch 12. The base portion 10' of the driven arm is pivotally supported between the base plates 3 and 3'. In the switch 12, 13 is the operating section 11 as is well known.
14 is a movable contact plate with a biasing force that constantly presses b, and 14 is a fixed contact plate, each of which has a contact 1 at one end.
3' and 14', and the other end is supported by an insulator 15 established from the substrate 2.

Next, reference numeral 17 denotes a speed increasing mechanism disposed between the main plates 3, 3, which is composed of a well-known gear train consisting of a large number of gears, and is mounted on the main shaft 5 from the first stage gear 18 to the final stage gear 19. The rotation speed is sequentially increased and the torque is decreased as the rotation speed reaches . The gear 18 at the first stage normally rotates in conjunction with the main shaft 5, similar to the gear (number one wheel) mounted on the main shaft of a well-known time switch, but when the main shaft is set and rotated, the gear 18 rotates due to a slipping action. It is configured not to follow the main shaft 5. Further, for the final stage gear 19, a stop locking piece 11 is provided to operate integrally with the driven arm 10.
c can be freely engaged and detached. Reference numeral 20 denotes a rotating disk made of a conductive material such as a metal plate, which is connected to the final stage gear 19.
The shaft 19' of the gear 19 and the rotation shaft 2 of the rotary disk 20 are pivotally supported between the base plates 3 and 3' so as to be interlocked with each other.
0', and they are usually constructed using integrally formed parts. Next, reference numeral 21 denotes a connecting shaft rotatably mounted on the board 2. A knob 22 for selecting the return speed of the main shaft 5 is fixed to one end protruding from the case, and a lever is attached to the other end inside the case. The base portion 23' of 23 is fixed to connect the knob 22 and lever 23 so as to be interlocked. Reference numeral 24 denotes a holding plate which pivotally supports the other end of the shaft 21 inside the case, and is fixed to the insulator 15. 25 is the connecting shaft 2
1, and is normally formed integrally with the base portion 23' of the lever. Reference numeral 26 denotes a locking member made of a material having spring properties, which is designed to fix any position of a magnet with respect to the disc 20, which will be described later, together with the engaging body 25, and whose base part is fixed to the insulator 15. Moreover, the tip 26' is bent so as to be able to come into contact with the outer periphery of the engaging body 25, and the tip 26' itself is one of a plurality of engaging recesses 25a formed in an uneven shape on the outer periphery of the engaging body 25. The engaging body 2 is provided with a biasing force that can be constantly engaged with the engaging body 2.
5, that is, free rotation of the shaft 21. Reference numeral 24' indicates a collar disposed between the substrate 2 and the engaging body 25. 27 is lever 2 that bends
3 is a supporting metal fitting provided at the tip, 28 is a rotating disk 20
A permanent magnet located close to the support fitting 27
The magnet 28 and the other arm piece 27b can be moved to positions on both sides of the disk 20 by actuation of the lever 23. In addition, 30 clearly shown in Figure 4
is an indicator piece exemplified as a slow speed display section, and knob 22
The magnet 28 is integrally formed with the magnet 28, and is configured so that the indicated position displaced by the rotation of the knob 22 corresponds to the position of the magnet 28 relative to the disk 20, that is, the return speed of the main shaft 5. For example, when used as a time switch during dehydration in an electric washing machine, as shown in FIG. When dewatering thick materials such as cotton, the main shaft 5 is configured to rotate slowly when the indication piece 30 is directed to "weak", and the main shaft 5 is configured to rotate quickly when dehydrating thin materials such as silk, when the indicator piece 30 is directed to "weak". be done. The slow speed display section 30 may be provided separately from the knob 22, while the selection display 31 may be attached to the knob 22.

In this specification, the configuration consisting of the slow speed display section 30 and the selection display 31 is also referred to as slow speed display means.

In the above configuration, if the return speed (time) of the main shaft 5 is configured to be obtained in two ways as shown in FIG. Time scale 32a (5 minute meter)
The operation when configured with a short time scale 32b (60 second meter) will be explained.

First, the user presses knob 2 for selecting the return speed of the spindle.
2 to move the indicating piece 30 to the desired indicating position, for example, the "strong" position as shown by the solid line in FIG. The position will be close to that of the Further, in this position, the distal end 26' of the locking member 26 is engaged with one of the engagement recesses 25a of the engagement body 25 and is fixed. Next, when the main shaft 5 is rotated in the setting direction 33 by an angle corresponding to the desired setting time from FIG. , the timer cam 7 also rotates, and the driven portion 11a that has fallen into the rest recess 7a of the cam comes into contact with the high step portion 7b of the cam 7. As a result, the locking piece 11c is disengaged from the gear 19, allowing the gear 19 to rotate, and the movable contact plate 13 is pressed so that the contacts 13' and 14' are closed (or disconnected). Next, when you release your hand from the main shaft 5,
The main shaft 5 begins to rotate in the return direction 34 under the force of the mainspring 6, each gear of the speed increasing mechanism 17 is sequentially rotated at an increased speed, and the rotating disk 20 begins to rotate. At this time, as understood from the well-known Arago's disk, a large braking effect is exerted on the rotating disk 20 by the magnetic flux between the magnet 28 and the arm piece 27b, and the disk 20 is
rotates at a relatively slow rotational speed. Therefore, the main shaft 5 begins to slowly rotate in the return direction 34, and the fifth
It operates in accordance with the long time scale 32a in the figure. After that, the idle recess 7a of the timer cam 7 is moved to the driven portion 11.
When a falls, the contacts 13' and 14' are turned off (or on) as shown in FIG.
and the time switch will stop.

Next, if you wish to use it as a short-time time switch, switch the knob 22 so that the indicator piece 30 indicates "weak". As a result, the magnet 28
moves away from the disk 20 in the direction of arrow 35 as shown in FIG. 3, and moves to a position where the influence of the magnet 28 on the disk 20 is reduced. In other words, the disk 20 becomes able to rotate at high speed. Also, during this switching operation, the tip 26' of the locking member 26
passes over the convex portion 25b of the rotating engaging body 25 and engages with the engaging recess 25a at a different position from that shown in FIG. The user can feel the tactile sensation through the knob 22 and perform reliable operation. After that, the main shaft 5 is rotated in the setting direction 34 in the same manner as described above.
When operated, the main shaft 5 moves to the short time scale 3 in Fig. 5.
It rotates at a fast return speed corresponding to 2b. It should be noted that the above-mentioned time switch can also be used with high adaptability, for example, when used in a microwave oven where accuracy is required as the setting time becomes shorter. In addition, the position of the magnet 28 with respect to the rotating disk 20 may be changed in two ways as described above, and the locking member 28 with respect to the engaging body 25 may be
By finely setting the engagement position of the shaft 6, the main shaft 5 can be operated at a plurality of return speeds by positioning it at the above-mentioned intermediate position or any other arbitrary position. This means that one time switch can be selectively used as time switches with various operating time limits, and a clockwork type time switch that can meet the demands of home appliance manufacturers can be provided at a low cost.

As mentioned above, in this idea, the mainspring 6
A rotating disk 20 is connected to the main shaft 5, which is energized by By operating the return speed selection knob 22 to move the magnet 28 closer to or closer to the rotary disk 20, the return speed of the main shaft 5 can be selected in various ways.

Moreover, in the present invention, by linking the movement of the magnet 28 with the slow speed display section 30, the user can obtain even more convenience. That is, the user operates the knob 22 to move the slow speed display section 30 to the desired direction of slow or fast, and the magnet 2
8 is moved toward and away from the disc 20, and the main shaft 5 can be rotated at a return speed corresponding to the instruction on the slow speed display section 30. This means that a single clockwork time switch can be used as a long-time time switch or as a short-time time switch, and multiple types of timers can be selected and used freely and easily. effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view (the board in the case is omitted), FIG. 2 is a partially cutaway side view, and FIG. FIG. 4 is a diagram showing the relationship between the slow speed display section and the selection display indicated by the slow speed display section;
FIG. 5 is a diagram showing the time scale of the main axis. 1...Case, 5...Main shaft, 6...Spring,
7...Timed cam, 13', 14'...Contact, 17...
...Speed-up mechanism, 20... Rotating disk, 20'... Rotating shaft, 23... Lever, 28... Magnet, 22... Knob for selecting return speed, 30... Slow speed display section.

Claims (1)

[Scope of utility model registration request] The main shaft is rotatably attached to the case, and a mainspring is arranged between the main shaft and the case so that biasing force can be accumulated by rotating the main shaft in a set direction. A time cam is attached to the main shaft so that it can rotate as the main shaft rotates, and when the main shaft is rotated in the set direction, a return force is stored in the mainspring, Thereafter, the main shaft rotates in the return direction under the biasing force of the mainspring, and after a predetermined period of time, the timer cam turns on and off the contacts. A rotating shaft of a rotating disk made of a conductive material is interlocked with the rotating disk, and a magnet supported by a lever provided in the case so as to be swingable is disposed in a position close to the rotating disk. , Furthermore, a knob for selecting the return speed of the main shaft is connected to the lever, and by operating the knob, the magnet is caused to exert a large influence of magnetic flux on the rotating disk. The knob is configured to be movable between a position facing the surface of the rotating disk so as to apply braking and a position where the influence of the magnetic flux is reduced and the braking is reduced, and the knob has a slow speed display section. A slow speed display section or a selection display is attached to the slow speed display means consisting of a and a selection display, and in the above case, the other of them can be set to either slow or fast by operating the knob. A clockwork time switch characterized by being energized so that it can be determined whether it has been selected.