JPS6364023B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention sets a time limit by rotating the main shaft in one direction.After that, the main shaft is turned in the opposite direction by the energy accumulated in the mainspring, and after a certain period of time, the main shaft is set. This invention relates to a spring-type time switch in which the switch is turned on and off by a cam attached to the main body.

In this type of time switch, since the swinging speed of the crown in the speed regulating mechanism is adjusted to be constant, the rotational speed of the timer cam is also approximately constant, which causes various inconveniences in use. In other words, it is necessary to set the control time to suit the type of controlled object (for example, in a washing machine for washing silk and cotton), but the operating speed of the speed regulating mechanism is In certain cases, it may not be possible to fulfill that wish.
Furthermore, there are various problems such as the inability to satisfy the desire to widen or narrow the rotation angle per unit time of the knob attached to the main shaft. Many types of inventions have been proposed in the past to solve this problem, but there is a time switch with a simple structure that allows speed conversion to be designed freely while maintaining highly accurate timed operation. Not provided.

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a spring-type time switch that has a simple configuration and is capable of speed control while maintaining high timing accuracy. It is something.

The drawings showing the embodiments of the present application will be described below. 1 to 6, reference numeral 1 indicates a mounting panel, which is a panel for a microwave oven or a washing machine. 2
indicates a time switch attached to the mounting panel 1. This time switch 2 will be explained below. Reference numeral 3 denotes a case, which is constructed by attaching a first case element 4a and a second case element 4b, each made of a synthetic resin material, to each other and fixing them with a set screw 5. Reference numeral 6 indicates a well-known main shaft, and 7 indicates a timer cam attached to the main shaft 6, a part of which is formed with a recess 7a. Reference numeral 8 indicates a switch disposed on the outer circumferential side of the timer cam 7, which is supported by a support 9 made of synthetic resin material, and includes a fixed contact plate 10 and a movable contact plate 1.
1 and the well-known contact balls 10a attached to them,
11a in a well-known manner. Note that the support body 9 is fixed to the case 3 as is well known.
In the movable contact plate 11, reference numeral 12 indicates a driven piece, and the movable contact plate
They are brought into contact with each other so that they can be moved with a spring force of 1.
Reference numeral 13 indicates a stop piece, which is used to stop the Tenfu described later. Next, reference numeral 15 indicates a speed regulating mechanism, which, as is well known, is composed of a crown 16 and an escape wheel 21. In the Tenfu 16, 17 indicates a base piece, which is made of a metal material. 18 is the base piece 17
The attachment piece is fixed to the holder and is made of synthetic resin material. Reference numeral 19 indicates a crown pin formed integrally with the attachment piece 18, and numeral 20 indicates a stop pin formed integrally with the attachment piece 18, respectively. Note that this crown 16 may be formed in a manner similar to a well-known timer so as to obtain the required moment of inertia, and may be formed entirely of metal or synthetic resin material. Reference numeral 22 denotes a gear train, which is interposed between the escape wheel 21 and the main shaft 6, and is configured to reduce the rotation speed of the escape wheel 21 and transmit it to the main shaft 6.

Next, 25 is a speed regulating cam, which is formed integrally with the timer cam 7 and rotates together with the timer cam 7. Note that this speed-governing cam 25 only needs to rotate in synchronization with the time-limiting cam 7, and the speed-governing cam 25 can be formed separately from the time-limiting cam 7 and attached to the main shaft 6, or it can be adjusted. The speed cam 25 may be supported by another shaft and connected to the main shaft 6 through a known gear mechanism so as to rotate in synchronization with the timer cam 7. Reference numeral 26 indicates a speed regulating lever, the base portion 27 of which is pivotally supported by a support shaft 28 erected from the first case element 4a, so that it can freely swing in the direction of the arrow shown in FIG. . In this speed regulating lever 26, reference numeral 29 denotes a driven piece, which is brought into contact with the outer peripheral surface of the speed regulating cam 25 so as to be able to follow the same.
Reference numeral 30 denotes a stop piece, which is configured to be received in the state shown in FIG. 4 by a receiving piece 31 attached to the first case element 4a. Reference numeral 32 denotes a spring portion extending from the base portion 27, which is formed into a thin wall shape as shown in the figure to have elasticity, and its free end is connected to a receiving piece 33 attached to the first case element 4a. After being caught, speed regulating lever 2
6 is biased toward the regulating cam 25. Next, a pair of regulating means 35 provided between the crown 16 and the regulating lever 26 will be explained. 3
Reference numeral 6 denotes a projecting portion, which is formed by projecting a part of the base piece 17 in the crown 16. Reference numeral 37 denotes a concave portion, which is formed in a shape that becomes narrower as it goes deeper.
Reference numeral 38 is a regulating piece formed with wall surfaces that sandwich the recessed portion 37. Reference numeral 39 indicates a non-regulating piece, which is provided in the shallow part of the recess 37. Reference numeral 40 denotes a guide surface, which is formed as a slope that smoothly continues into the deep part of the recess 37. Next, reference numeral 41 indicates a projecting piece, which is provided at the tip of the holding piece 41 extending from the speed regulating lever 26. Note that the speed regulating lever 26 is integrally formed of a synthetic resin material including the above-mentioned protruding piece 41' or the protruding piece 41, but the protruding piece 41 is formed of a metal material and is attached to the protruding piece 41. It may be configured by being fixed to the tip of '.

Next, reference numeral 43 indicates a scale plate attached to the mounting panel 1, on which a scale as shown in FIG. 6, for example, is written. In this scale, the range indicated by A has small intervals between the scales of unit time (for example, 1 minute), and the scale is coarsely marked (30 seconds) in between, and the range indicated by B indicates the interval between the scales of the unit time. is large, and the range is detailed (for example, 10 seconds)
There is a scale. Reference numeral 44 designates a knob attached to the main shaft 6, which is rotated together with the main shaft 6 using an engagement pin 45 as is well known. Also this pick 44
is equipped with a pointer for indicating the scale of the scale plate 43. 42 is the second case element 4b
As is well known, a mainspring storage section is shown inside which is provided with a mainspring as is well known, and one end of the mainspring is mechanically fixed to the main shaft 6 and the other end to the mainspring storage section 42.

When setting the time with the above configuration, turn the main shaft 6 through the knob 44 in the time setting direction shown by arrow A in FIG. 43, for example, the 3 minute point in FIG. By rotating the main shaft 6 in this way, the timer cam 7 and the regulating cam 25 rotate together with the main shaft 6,
The driven piece 12 of the switch 8 comes into contact with the high step part of the timer cam 7, and the switch 8 is in a closed state.
Further, the driven piece 29 of the speed regulating lever 26 comes into contact with the high step portion 25a of the speed regulating cam 25, resulting in a state as shown in FIG. 3. Also, as is well known, the mainspring storage section 4
The mainspring stored in 2 is also wound up.

After setting the time as described above, when the knob 44 is released, the main shaft 6 rotates in the direction indicated by arrow B in FIG. 2 due to the return force of the mainspring. This rotational speed is controlled by the operation of the speed regulating mechanism 15. Next, the control of the rotational speed of the main shaft 6 by the speed regulating mechanism 15 will be explained. While the pointer of the knob 44 indicates a time between 3 minutes and 1 minute on the scale plate 43, the driven piece 29 moves toward the speed regulating cam 2.
It is in contact with the high step portion 25a of No. 5. Therefore, the protruding piece 41 of the restricting means 35 is located in the non-restricting portion 39 of the recess 37, as shown in FIG. Therefore, the crown 6 vibrates at its maximum swing width, that is, at a relatively slow swing speed, and the escape wheel 21 rotates relatively slowly at a speed corresponding to the swing speed of the crown 16. As a result, this escape wheel 2
The main shaft 6 connected to the main shaft 1 also rotates in the direction of the arrow B at a relatively slow speed. In this state, when the main shaft 6 rotates until the pointer points to 1 minute on the scale, the driven piece 29 of the speed regulating lever 26 moves from the high stage part 25a of the speed regulating cam 25 to the low stage part 25b. The state shown in FIG. 4 is reached. In this case, the driven piece 29 does not come into contact with the low step portion 25b, and the stop piece 30 is received at a fixed position by the receiving piece 31. However, this does not require the use of the stop piece 30 or the receiving piece 31, and the driven piece 29 is received by the low step part 25b of the cam, so that the regulating piece 38 and the projecting piece 4 as shown in FIG.
The positional relationship with 1 may be maintained. In this state, as the crown 16 vibrates, the regulating piece 38 comes into contact with the protruding piece 41, so the amplitude of the swing of the crown 6 is smaller than the state shown in FIG. The width becomes the same as the one shown above, and the swing speed of Tenfu 16 becomes faster. Therefore, the escape wheel 21 also rotates at a faster speed than in the state shown in FIG. 3, and the main shaft 6 connected thereto also rotates in the direction of arrow B faster than in the above case. In addition, since the guide surface 40 is provided to prevent the protrusion 41 from entering the recess 37 from the shallow part to the deep part, the protrusion 41 does not enter the recess 37 from the shallow part (recess) even when the crown 16 is vibrating. It is done smoothly without getting caught in the opening part of 37).

When the main shaft 6 rotates at a relatively high speed as described above and the pointer reaches the 0 position on the scale, the driven piece of the switch 8 falls into the recess 7a of the timer cam, and the switch 8 is released. Stop piece 13
comes into contact with the stop pin 20, thereby stopping the vibration of the crown 16. Therefore, all operations of this timer are stopped.

Next, FIGS. 7 and 8 show examples of different shapes of the speed regulating cam. That is, in FIG. 7, the inclined portion 25 is located between the high step portion 25ae and the low step portion 25be.
c, and in FIG. 8, the high step 25ae
A middle step portion 25d is formed between the lower step portion 25be and the lower step portion 25be. By forming the speed regulating cam in this way, the driven piece of the speed regulating lever can be attached to these inclined portions 25.
c or when it is in contact with the middle section 25d,
The swing width of the above-mentioned crown is intermediate between the swing widths of the respective crowns when the driven piece is in contact with the high step portion 25ae or the low step portion 25be. Therefore, the rotational speed of the main shaft connected to the heaven through the escape wheel is also a medium rotational speed. Due to such rotation, the scale of the scale plate is in a state as shown in FIG. 9, for example. That is, in the section indicated by C, the interval between the unit time scales is small, in the section indicated by D, the interval between the unit time scales is somewhat large, and in the section indicated by E, the interval between the unit time scales is the largest.

In this way, the shape of the speed regulating cam can be arbitrarily changed in various ways so that the main shaft can rotate at a desired rotation speed in a desired time period.

Further, the relationship between the depth of the recess 37 and the spacing between the regulating pieces 38 and 38 at that position, that is, the shape of the recess 37 is as shown in the figure, a V shape where the shallow part is wide and the deep part is narrow.
In addition to the shape of a letter, it may be formed in a shape where the shallow part is narrow and the deep part is deep. Just change its shape to .

Next, FIG. 10 shows a different embodiment of the present application, and shows an example in which the configuration of the regulating means is different. In the example shown in FIG. 10,
A protruding piece 41f is provided at the tip of the projecting portion 36f on the crown 16f, and regulating pieces 38f, 38f are provided on the regulating lever 26f, respectively.

Even in this configuration, the swing speed of the crown 16f can be changed by adjusting the swing width of the crown 16f, just as in the case described above.

It should be noted that the same reference numerals as those in the previous embodiment are appended with an alphanumeric letter "f" for parts that are functionally the same or equivalent to those in the previous embodiment, and redundant explanations are omitted. (Also, in the following figure, the same idea is given and the redundant explanation is omitted by adding the letter g.) Next, Figs. 11 to 14 show still different embodiments, in which the timer cam 7g The movable contact plate 11g also has the function of a speed control lever, and the protrusion 41g of the regulating means 35g also has the function of stopping the balance 16g. The above structure operates in the manner shown in FIGS. 12 to 144 in the rotation process of the main shaft 6g in the direction of arrow B. That is, the first
In the state shown in Figure 2, the swing speed of the Tenfu 16g is slow and the main shaft 6g rotates slowly, and in the state shown in Figure 13, the Tenfu 16g swings slowly.
The swing speed of g is faster than in the state shown in Fig. 12, so the main shaft 6g rotates faster, and in the state shown in Fig. 14, when the switch opens, the protrusion 41g comes into contact with the bottom of the recess 37g, and the top 16g stops. do.

As described above, in this invention, energy is stored in the mainspring by rotating the main shaft 6 in one direction A, and then the main shaft 6 is rotated in the opposite direction by the accumulated force of the mainspring. In that case, since the speed regulating mechanism 15 is connected to the main shaft 6, the main shaft 6 is returned at a predetermined speed and the cam attached to the main shaft 6 controls the time-controlled opening and closing operation of the switch 8. There are features that can be used.

In addition, in the present invention, a speed regulating cam 25 is provided which is interlocked with the hand shaft 6, and the speed regulating lever 26 is actuated by the cam 25, so that the movement of the speed regulating mechanism 15 can be controlled to a slow speed. Therefore, the interlocking between the timer cam 7 and the speed regulating cam 25 can be performed with extremely high precision, and as a result, it is possible to perform speed regulating control while maintaining the high precision of the set time, and this type of spring-type time switch This will have a great effect on expanding its uses.

Furthermore, in the present invention, the control of the speed regulating mechanism 15 is provided between the balance 16 and the speed regulating lever 26.
Since it can be constructed with a pair of extremely simple-shaped regulating means consisting of the protruding piece 41 and two regulating pieces 38, 38, it is extremely simple to manufacture, and due to the above-mentioned simple shape, there is no possibility of failure. There is no cause for this occurrence, and there is also an epoch-making feature that allows variable control of the return speed of the spindle without changing the basic concept of this type of spring-type time switch.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a side view of the time switch with a part of the case cut away, FIG. 2 is a rear view of the time switch with the second case element removed, and FIG. 3 and 4 are partial views showing the relationship between the regulating cam, the regulating lever, the regulating means, and the crown, FIG. 5 is a perspective view of the same, FIG. 6 is a diagram showing the scale, and FIGS. 7 and 8. The figure shows different examples of speed regulating cams, Figure 9 shows different examples of scales,
0 is a diagram showing a different example of the regulating means, FIG. 11 is a diagram similar to FIG. 5 showing a further different embodiment, and FIG.
2 to 14 are diagrams showing the same operating state. 6...Main shaft, 7...Timed cam, 16...Tenfu,
21...Escape wheel, 25...Governing cam, 26...
Speed regulating lever, 35... regulating means, 38... regulating piece, 41... projecting piece.

Claims (1)

[Claims] 1 A timer cam is attached to the main shaft rotatably attached to the case, and the main shaft is configured to be able to turn on and off a switch arranged opposite to the cam. One end,
The main shaft is connected so that it can be rotated by the energy stored in the spring, and a speed regulating mechanism consisting of an escape wheel and a crown is connected to the main shaft, and the main shaft is rotated in the time setting direction. After moving,
In the spring type time switch, the main shaft is configured to return in the opposite direction at a speed corresponding to the swing speed of the balance in the speed governor mechanism, and a speed governor cam is operatively connected to the main shaft, while
The speed regulating cam is provided with speed regulating bars facing each other so as to be moved in response to the rotation of the cam, and furthermore, a part of the speed regulating lever and the above-mentioned crown are opposed to each other, and a pair of bars are arranged between them. A regulating means is provided, and the regulating means includes two regulating pieces spaced apart from each other and facing each other in one case, and two regulating pieces disposed opposite to each other in the other case. Each of the above-mentioned two regulating pieces is formed by a protruding piece provided so as to be located between the two regulating pieces, and the distance between the two regulating pieces can be adjusted by adjusting the depth and shallowness of the above-mentioned protruding piece between the regulating pieces. A wind-up time switch characterized by a structure in which the amplitude of the swing changes at intervals.