JPS6157644B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a timer that is used to operate a controlled device for a certain period of time and is also capable of selecting the mode of operation of the controlled device.

This type of timer is known to have two operating sections: one for setting the operating time of the controlled device and another operating section for selecting the operating mode of the controlled device. It is being However, such a device has the disadvantage that, in order to cause the controlled device to operate, two operating sections must be operated, making the operation cumbersome.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a timer that eliminates the above-mentioned conventional drawbacks, and which allows the selection of the operating mode of a controlled device and the setting of the operating time of the controlled device for each operating mode to be performed simply. This can be done by simply rotating one main shaft.
Furthermore, an object of the present invention is to provide a timer which has high time accuracy and can be constructed with a small number of members.

The drawings showing the embodiments of the present application will be described below. Reference numerals 1 and 2 represent base plates, which are fixed to a timer case (not shown) by well-known means. 3 is the main plate 1,
The main shaft is rotatable relative to the main shaft, and is made of aluminum alloy, brass, free-cutting steel, etc. 4 is a mainspring, and as is well known, one end is connected to the main plate 1 and the other end is connected to the main shaft 3. 5a is a top and 5b is an escape wheel, which constitutes a well-known speed regulating mechanism. Reference numeral 6 denotes a gear train that connects the speed regulating mechanism and the main shaft 3. The mainspring 4, the crown 5a, the escape wheel 5b, and the gear train 6 constitute the clock mechanism of the main shaft 3.
Further, as is well known, a slip mechanism is provided in the middle of the tooth train 6 or between the tooth train and the main shaft 3 to enable manual rotation of the main shaft 3. Next, a cam boss 7 is press-fitted and fixed to the main shaft 3, and is made of aluminum, aluminum alloy, brass, free-cutting steel, or the like. Reference numeral 3 denotes a main cam that is loosely fitted to the cam boss 7, and has high step portions 3b and 3d, which are illustrated as closing elements, on the outer periphery, and is adjacent to the high step portions 3b and 3d on the opposite time rotation direction (direction of arrow X) of the cam 8. It has low step portions 8a and 8c, which are illustrated as open elements formed at certain positions. The elevated step portions 8b and 8d are formed to have arbitrary lengths (angles) depending on the purpose. Furthermore, this main cam 8
is formed using resins such as polyacetal, ABS, phenol, and melamine phenol. 9 is a connecting recess formed on the inner surface of the main cam 8. 1
1 is a drive piece fixed to the cam boss 7, and the connecting recess 9
The rotation of the main shaft 3 can be transmitted to the main cam 8. This drive piece 11 is formed using aluminum alloy, brass, iron, or the like. 1
Reference numeral 2 denotes a stopper plate, which is made of a hard material such as metal.
3, a fitting piece 14 left in a fan-shaped fitting hole 16 drilled in the base plate 2, and a locking piece 15 positioned on the rotation locus of the drive piece 11. Next, reference numeral 18 denotes a driven piece pivotally connected to the main plate 2 so as to be able to freely swing in the direction of the arrow, and is opposed to the main cam 3. 19 is a stop piece integrally formed with the driven piece 18;
8 is in contact with the low step portions 8a, 8c of the main cam 8, the swinging of the crown 5a is stopped and the operation of the clock mechanism is stopped. A main switch 20 is composed of a fixed contact plate 20a and a movable contact plate 20b driven by a driven piece 18. These contact plates 20a, 20b are supported by a support member 21 attached to a timer case (not shown). Next, reference numeral 22 denotes an intermittent cam that is connected to the intermediate portion of the tooth train 6 and rotated at a faster speed than the main cam 8, and includes two cam elements 22a and 22b that are integrally formed with each other. Consists of. Reference numeral 23 designates an intermittent switch, which includes a contact plate 23a that is driven by the cam element 22a, and a contact plate 23b that is driven by the cam element 22b. 24 is the main plate 2
A support member fixed to the contact plates 23a, 23b
It is designed to support the Furthermore, the main switch 2
0 and the intermittent switch 23 are connected by a connecting line 25 so that the main switch 20 and the intermittent switch 23 are connected in series, as shown in FIG. Further, a controlled device (for example, a washing machine or a microwave oven) is connected in series to a circuit in which these switches are connected to each other. Next, 27 is a closing member formed integrally with the main cam 8, and configured to forcibly close the intermittent switch 23 via a connecting piece 28 attached to the contact plate 23b of the intermittent switch 23. has been done. Furthermore, this closing member 27
is disposed at a position where the intermittent switch 23 can be closed while the driven piece 18 is driven by the low step portion 8a and the high step portion 8b of the main cam 8.

Next, the operation of the timer with the above configuration will be explained.

(1) When the controlled device is continuously energized to perform “strong” operation, and then stopped after a certain period of time has elapsed.In this case, the main shaft 3 is rotated manually, as shown in Figure 5. The main cam 8 is rotated via the driving piece 11, and the driven piece 18 is made to face the high step portion 8b. Note that the direction in which the main shaft 3 is manually rotated is the counter-time rotation direction (also called the time setting direction) when the driven piece 18 faces the low step portion 8a of the main cam 8.
X, and when facing the low step portion 8c, the timed rotation direction is Y. By operating in this way, the main switch 20 is closed, and the intermittent switch 23 is pushed away from the intermittent cam 22 by the closing member 27 and closed. This state corresponds to the section indicated by B in FIG. When you release your hand from the main shaft 3, the main shaft 3 is rotated in the timed rotation direction Y by the clock mechanism, and the main cam 8 is also rotated in the same direction via the drive piece 11, as shown in FIG. . In this state, the controlled device is continuously energized.

After such a state continues, when the set time ends, the driven piece 18 faces the low step portion 8a as shown in FIG. 1, and the switch 20 is opened. This state corresponds to the section indicated by A in FIG. This cuts off the power to the controlled device,
The controlled device is in a stopped state. In addition, when the main switch changes from the closed state to the open state, that is, the driven piece 18
The operation when it approaches the step between the high step 8b and the low step 8a is as follows. Main cam 8
There is play between the connecting recess 9 and the driving piece 11, and since the driven piece 18 is pressed against the main cam 8 by the spring force of the movable contact plate 20b, the pressing force causes the main cam to 8 is rotated prior to the rotation of the main shaft 3. Therefore, the main switch 20 is instantaneously opened.

(2) When the controlled device is intermittently energized to perform "weak" operation, and then stopped after a certain period of time. In this case, the main shaft 3 is manually rotated in the time setting direction 18 is placed opposite to the high step portion 8d as shown in FIG. Then, the main switch 20 is closed, and the closed state of the intermittent switch 23 pushed up by the closing member 27 is also released, so that the intermittent switch 23 is driven by the intermittent cam 22.
This state corresponds to the section indicated by D in FIG. 10.

When the main shaft 3 is released, the main cam 8 is rotated in the timed rotation direction Y, as in the case described above. In this state, as shown in FIGS. 7 and 8, the intermittent switch 23 constantly repeats opening and closing due to the rotation of the intermittent cam 22. Therefore, the controlled device is intermittently energized.

After this state continues, when the set time ends, the driven piece 18 faces the low step 8c as shown in FIG. 9, and the main switch 20 is opened. This state corresponds to the section indicated by C in FIG. 10. As a result, the power to the controlled device is cut off, and the controlled device enters a stopped state. In this case as well, the main switch 20 is opened quickly in the same manner as described above.
In addition, when rotating the main shaft 3 manually as described above, excessive rotation, that is, exceeding the normal linked position of the main cam 8 and the driven piece 18 as shown in the figure, will cause the drive piece 11 to stop when the stopper plate 12 locking pieces 15
is locked and prevented. In this case,
Since the driving piece 11 and the main plate 2 are arranged close to each other as shown in FIG. 3, the twisting force applied to the stopper plate 12 is suppressed to a small level, and deformation of the stopper plate 12 is prevented. . In addition, when locking the drive piece 11 in this way, the fitting piece 14
is placed in the sector-shaped fitting hole 16, and the stopper plate 12 has a margin for movement in the direction of rotation of the main shaft 3. Therefore, the locking structure described above prevents the rotation of the main cam 8. The range of movement is not narrowly restricted.
Note that the length of the fitting hole 16 in the rotation direction of the main shaft 3 is determined based on the necessary rotation angle of the main cam 8 and the drive piece 11.
and the width of the locking piece 15 (the length in the rotating direction of the main shaft 3).

In addition, in the case of intermittent energization as described above,
The cycle of energization and de-energization and the ratio of each length may be arbitrarily determined depending on the purpose.

Furthermore, the relationship between the high step portion and the low step portion of the main cam 8 and the opening and closing of the main switch 20 can be arbitrarily determined depending on the purpose other than the relationship shown in this example.

As described above, in the present invention, although it is a single timer, there is a timer that continuously energizes the controlled device, causes it to operate in "strong" mode, and then stops it, and a timer that energizes the controlled device intermittently. It has the feature that it can be used in two ways, including a timer that turns it on to "low" and then stops it. Moreover, when using this and setting the time, you can select one of the two types of operation and set the time at the same time by selecting the rotation angle in the process of rotating only the main shaft. It has the advantage of being easy to operate. To explain the above point in more detail, when a user wants a controlled device to perform a task, the user must select the content of the task, that is, whether to have the device perform the task by continuous energization or by intermittent energization. and the setting of working hours for each job, using a single main axis manually.
This can be done at the same time with a single operation of simply turning the device within a 360° range, which has the effect of making it extremely easy to start the operation of the controlled device. Furthermore, since this timer has two modes of operation as described above within a rotation angle of less than 360 degrees of the main shaft, it is operated using the return force of the mainspring. Even if the return force is approximately constant, the operation can be performed using a section where the return force is approximately constant, and there is an advantage that the time accuracy can be improved. Furthermore, since the above two types of operations are performed in combination using only two switches, the main switch and the intermittent switch, not only the switches but also the cams that operate them are required. Even if the timer is capable of selecting two types of operation and setting their operation time as described above, there is an economical advantage that it can be provided at a low cost, and there is also a reduction in the number of parts. It also has the advantage of keeping the failure rate low and increasing reliability due to the small amount of damage.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an internal structure diagram of the timer with the case removed, and FIG.
The figure is a partially broken left side view of Figure 1, Figure 3 is a cross-sectional view along the line, Figure 4 is a cross-sectional view along the line, and Figure 5 is a cross-sectional view along the line.
9 to 9 are partial views showing operating states, and FIG. 10 is a diagram showing the relationship between the rotation angle of the cam and the opening/closing of the switch. 3...Main shaft, 8...Main cam, 8b, 8d...Closing element, 8a, 8c...Opening element, 20...Main switch, 22...Intermittent cam, 23...Intermittent switch,
27...Closing member.

Claims (1)

[Claims] 1 A clock mechanism operated by the return force of a mainspring is connected to the main shaft, a main cam is attached to the main shaft so as to be rotatable in conjunction with the main shaft, and a main switch is mounted so as to be movable in opposition to the main cam, Furthermore, the main cam is provided with two closing elements in different sections, each of which closes the main switch for a set time, and a counter-timed rotation of the main cam is provided for each closing element. Each position adjacent to the moving direction side is provided with an opening element that opens the main switch when a set time has elapsed, while the clock mechanism is provided with an intermittent cam that can be rotated in conjunction with the clock mechanism. At the same time, the intermittent cam is driven by an intermittent switch so that it can be opened and closed intermittently, and the main cam is provided with a closing member that closes the intermittent switch when the main cam is in contact with the intermittent switch. The intermittent switch is closed while the main switch is in contact with the section of one closing element on the main cam, and the intermittent switch is closed while the main switch is in contact with the section of the other closing element on the main cam. A timer characterized in that the main switch and the intermittent switch are connected in series, and the main switch and the intermittent switch are connected in series.