JPS60172119A - Changeover timer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a timer for supplying electricity to a motor that generates water flow in a water tank in an electric washing machine. This relates to a switching timer that can supply data alternately.

This type of switching timer rotates two cams synchronously, and is equipped with two switches that turn each cam on and off in a synchronous manner, and the two switches are operated alternately. That's how it is. In this configuration, when the cam is rotated at a constant speed, the switching interval is constant, and the amount of power supplied to the washing motor is constant.

However, in the case of a washing machine motor, there are times when it is desired to increase the amount of power supplied during a certain cycle, and decrease it at other times (if you want to make the water flow strong or you want the water flow to be extremely weak). case, etc.). These demands have been met by increasing the number of switches or contacts, and synchronously relating their mutual movements by other means. Therefore, the number of parts in the switch is high, the operation means are complicated, and the risk of failure increases.

Therefore, the present invention is designed to eliminate the above-mentioned problems, and it is possible not only to use the cam at the bottom limit and the switch at the bottom limit for normal alternating switching, but also to close the switch p within a certain period of time. It is an object of the present invention to provide a switching timer that allows the length of time to be changed easily.

The drawings showing the embodiments of the present application will be described below.

In FIGS. 1 to 5, 1 is a case body, 2 is a lid body, both of which are formed using synthetic resin materials,
They are joined together to form the timer case. Reference numeral 3 indicates a rotating shaft that is rotatable relative to the case, and 4 and 5 indicate a seventh cam (integrally formed) and a second cam attached to the rotating shaft.
Showing cam. In these cams, 6 indicates a high step portion, 7 indicates a low step portion, and 8.9 indicates a cam surface connecting the high step portion and the low step portion, respectively.

Among these cam surfaces, the cam surface 8 is a surface whose radius gradually increases as it rotates from the low step portion 7 toward the high step portion 6, as shown in the figure. The cam surface 9 is a surface in the radial direction of the cam as shown in the figure.
may be formed on a surface whose radius gradually decreases as the cam surface 8 rotates. IO indicates a gear integrally formed with the seventh and second cams 4 and 5 using a synthetic resin material.

Next, reference numeral 11 indicates a clock mechanism for rotating the first and second cams 4 and 5, and as is well known, there is a timer motor attached to the main body l, and a speed reducer connecting the rotating shaft of the timer motor L and the gear lO. It consists of a gear train 13. Next ■
16 indicates the first switch, and 16 indicates the second switch. In these switches, reference numeral 17 denotes a support base made of an insulating material, which serves both as the first switch L5 and the second switch 16. The slide 18 is a cam follower contact plate, and the follower parts 19, 19 provided at the tips of each slide face the first cam 4 and the second cam 5 so as to be able to follow them, respectively. The field indicates another contact plate facing the above contact plate blade. Reference numeral 21 denotes a seventh terminal in the switch, which is formed integrally with the contact plate blade of the first switch. ρ is a second terminal, which is integrally formed with the contact plate blade of the second switch 16. The phantom terminal is a common terminal, which is formed integrally with the contact plate of each of the switches 1f+ and 16 mentioned above. Note that the common terminal n is integrally formed with the contact plates 18, 18,
Seventh terminal 21. The second terminal ρ is connected to each switch lfi,
It may be integrally formed with each of the 16 contact plates. Next, means for changing the closing time length will be described. In this case, reference numeral 5 denotes a displacement member, which is rotatably mounted on the case and is positioned opposite the contact plates of the #/ and second switches IF+ and 16, respectively. This displacement member 5 has the smallest radius D from the center of rotation as shown in Fig. 2 and Fig. 3.
1, a medium diameter part n having a larger radius D2, and a large diameter part row having the largest radius Ds. Reference numeral 4 designates an operating section integrally formed with the displacement member 5, which protrudes from a through hole provided in the lid 2 to the outside of the case to enable manual operation. As is well known, a knob for manual operation is attached to the operating portion 4. Next, (capital) indicates a positioning member, which is used to position the displacement member δ at a position where the small diameter portion of the displacement member 6, the medium diameter portion d, or the large diameter portion row faces the contact plate. be. This member (9)
In the figure, reference numeral 31 denotes a cam body 1 integrally formed with the displacement member 6, and around the cam body 1, there are a plurality of large-diameter rows as clearly shown in FIG. It is a spring plate with both ends fixed to the main body 1 and the middle part pressed against the cam body 31.

Depending on the gloss of the positioning member having such a configuration, the state in which the two large-diameter rows 32 are in contact with the spring blades is stably maintained, as clearly shown in FIG.

As a result, each part z, 27, 28 of the displacement member 6 is selectively positioned to face the contact plate.

Next, in the circuit connected to the timer with the above configuration, the power source is a well-known commercial power source, the numeral is the washing motor, the numeral 37 is the seventh
and a second terminal, which are connected as shown.

In the configuration described above, when the timer motor ν operates, the gear lO is rotated via the gear train 13, and the first and second cams 4 and 5 integral with the gear lO are rotated. As a result, the first switch 16, which is driven by the first cam 4, and the second switch 16, which is driven by the second cam 5, repeat their opening and closing operations.

The opening/closing operation is such that when the driven part 19 is lifted by the cam surface 8, the connection between the contact plate and the contact point is separated, and then when the driven part 19 falls down the cam surface 9 after passing through the high step 6, both contact plates 18 .20 connects. Note that since the first cam 4 and the second cam 5 are provided so as to be shifted by θ° around the rotating shaft 3, the contact and separation of the first switch and the contact and separation of the second switch 16 are performed alternately.

As a result of the operation of the first switch 16 and the second switch 16 as described above, the first and second terminals of the washing motor I are
Current is alternately supplied to the washing motor and the washing motor repeats forward and reverse rotation.

Next, the relationship between the operations of the first and second switches b and 16 and the closing time length changing means will be explained in detail with reference to FIGS. V and 5 of the drawings. Figure (G) shows the state of energization to the washing motor 5 when the operation unit is operated to obtain a weak water flow, and Φ) shows the state of electricity supply when the operating unit is operated to obtain a medium water flow. , 0 indicate similar conditions when a strong water flow is obtained. Also, Figures 5 (A-1) to (A-8) show the relationship between the cam and the switch at each point in time (1) to (8) in case (g) in Figure 5. Figures 5 (B-1) to (B
-8) and (C-1)/3 to (C-8) are respectively in the figure).

It shows the relationship between the cam and the switch at a similar point in time in the case of 0.

First, when the operating device is operated so as to obtain a weak water flow, the small diameter portion faces the tentative contact point as shown in FIG. 5 (A-1). At this time, when the driven part 19 falls from the high stage part 6 toward the low stage part 7, the switch b closes as shown in (A-1) K, and then the cam 4 moves at a slight angle a0 as shown in (A-2). When the cam 4 rotates by a slight angle, the driven portion 19 comes into contact with the cam surface 8, and then, as shown in (A-8), when the cam 4 rotates by a slight angle, the contact plate 20 is disconnected. - The power cylinder 2 switch is out of phase with the first switch by 00 degrees and performs the same operation.

As a result, as shown in Figure 1, the current that causes the washing motor to rotate in the normal direction is supplied for a short period of time, then no current is supplied for a relatively long time, and then the current that causes the motor to rotate in the reverse direction is relatively low. The current is supplied in a state in which the current is supplied for a short period of time and then no current is supplied for a relatively long period of time. As a result, the motor repeatedly rotates in the normal direction for a short period of time, then enters a long resting state, then reverses for a short period of time, and then enters a long resting state again. This allows a very weak water flow to be obtained in the washing tub.

Next, when the operating device is operated so as to obtain a medium flow, the medium diameter portion I faces the contact plate as shown in FIG. 5 (B-1). In this case, the rear cam 4 is in the state shown in (B-1) as shown in a.

(B-2
As shown in (B-8), the driven portion 19 comes into contact with the cam surface 8, and when the angular cam rotates a little, the connection between the contact plates is separated as shown in (B-8). As a result, as shown in FIG. 3(C), the energization time for each of the forward and reverse rotations of the motor I becomes longer than in the case (A).

As a result, a medium water flow stronger than the weak water flow is obtained in the washing tub.

Next, when the operating device is operated in a state where a strong water flow is obtained, the large diameter section faces the contact point tentative title as shown in Figure 5 ((3-1). Therefore, in this case, (C As shown in Figure 0, the driven part 19 comes into contact with the cam surface 8 and the switch opens. Both the energization time for turning and the energization time for reversing are longer than in the above-mentioned case (middle), and the strongest water flow can be obtained in the washing tub.

Next, the above configuration has cams 4, 5 and switch L'l.
, 16, the position of the contact plate I is changed using the displacement member δ, but the relative position between the cam and the switch can be changed by the displacement member 5
You can also do it as follows without using . .

First, one method is to provide the timer case with a guide portion 41 as shown by the imaginary line in FIG. '),
The support stand 17 of No. 16 can be moved in the direction of arrow C, and a knob for manual operation is attached to the support stand 17, and it is inserted through the elongated hole formed in the case and displayed on the outside of the case. The relative positions of the cam and the switch may be changed by causing the cam to come out and operating the knob.

As a second method, as shown in Fig. 5 (B-1), the guide member d is oriented in a direction 90 degrees different from that in (A-1), and the entire switch is mounted on a support stand as shown by the arrow. 17 is configured so that it can be tilted in the direction of arrow 6 with respect to the case, and the positions of the cam and the switch are relatively displaced by operating a knob mounted on the support base 17 from outside the case. Also good.

Next, in the above embodiment, the first cam 4 and the second cam 5 are arranged at the same position in the rotational direction, although the positions of the first cam 4 and the second cam 5 are shifted by θ° from each other. , instead, the first switch and the second switch are connected to the rotating shaft 3.
The two cams may be arranged at 90 degrees with respect to each other, and may be driven by the first cam and the second cam, respectively. In that case, it is preferable to provide the displacement members 5 for each switch individually and operate them side by side, or to connect the two displacement members with an interlocking member so that they can be operated all at once.

Next, FIG. 6 shows examples of different shapes of the first cam (or second cam). This cam is configured to open and close the switch seven times during one rotation, and the radius of the cam surface 8e connecting the low section 7e and the high section 6e changes in stages. It is composed of: That is, the cam surface 46.48
．． 50 is a cam surface with a uniform radius of a small radius, a medium radius, and a large radius. It is.

Even with such a structure, the closing time length of the switch can be changed as in the case described above by changing the relative positions of the cam and the switch.

It should be noted that parts that are considered to have the same or equivalent structure as those in the previous figure in terms of function are given the same reference numerals as in the previous figure with the letter e, and redundant explanations are omitted. (Furthermore, in the subsequent pages, the same idea is applied in order, and the alphabet flg is added in order to omit redundant explanations.) Next, Fig. 7 shows different examples of the closing time length changing means. . In the figure, the lever is pivotally attached to the case using a shaft. The operating portion 29f attached to the lever is exposed to the outside of the case through a long hole provided in the case so that it can be manually operated. By moving the operating portion 29f in the direction of the arrow, the displacement member 25f moves in the direction of the arrow, displacing the contact plate 2Of in the direction of the arrow.

Next, Figure 1 shows a further different embodiment of the present invention, in which the positional relationship between the cam driven contact plate 18g and the other contact plate 20g is reversed from that of the previous embodiment, and the cam driven contact plate 18g is
This shows an example in which the contact plate 20g can be moved away from the cam that has approached the cam side by displacing the displacement member 25g in the direction of the arrow.

Although the example above has been shown in which the position of the switch is changed without changing the position of the cam, the two are relative, and the position of the cam may be changed without changing the position of the switch.

As described above, in this invention, since the first cam 4 and the second scum 5 are rotated synchronously, the first switch 16 and the second switch 16 are alternately activated. It is possible to alternately send power for forward rotation and power for reverse rotation to the washing motor, which is useful in that, for example, it is possible to repeatedly rotate the washing motor in the forward direction and then in the reverse direction.

Moreover, when supplying power for forward rotation and power for reverse rotation to perform forward and reverse operation as described above, the first
The closing time of the switch and the second switch 16 can be varied in various ways by slightly displacing the relative positions of the cams 4, 5 and the switches L'+, 16. A large amount of power can be supplied to the motor with a long closing time, or a small amount of power can be supplied with an extremely short closing time. In the case of a washing motor, it can produce extremely beneficial effects such as generating a strong forward and reverse water flow or a weak forward and reverse water flow.

Moreover, even if the configuration is capable of supplying power for forward rotation and reverse rotation as described above, and can change the amount of power,
According to the present invention, there is an advantage that this can be done with a very simple configuration, simply by slightly displacing the position of the switch relative to the position of the cam. This means that
The above-mentioned versatility is achieved by the configuration of the minimum unit switching timer consisting of two seven sets of cams (first cam 4 and second cam 5) and two seven sets of switches (seventh switch L5 and second switch 16). It can demonstrate its truly groundbreaking usefulness.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application; Fig. 1 is a partially cutaway exploded perspective view, Fig. 2 is a plan view with the lid removed, and Fig. 3 is a plan view with the lid removed.
The figure is a circuit diagram, Figure 5 is a time chart, Figure 5 is an explanatory diagram of operation, Figure 7 is a diagram showing examples of different shapes of cams, and Figure 7 is a diagram showing different examples of closing time length changing means. The figures shown in FIG. 1 are schematic diagrams showing different examples of switches. 4...First cam, 5...Second cam, 6...High stage part, 7...Low stage part, 8...Cam surface, L5...First switch, 16... -Second switch, 2...closing time length changing means, 6...displacement member. Figure 2 3' −已)

Claims (1)

[Claims] Each of the cams has a high step portion and a low step portion, and the high step portion and the low step portion are connected by a cam surface whose radius changes successively. The two cams are connected to the clock mechanism to rotate synchronously;
At positions close to each of the cam surfaces, there are a first switch and a second switch, each of which is configured to have its driven portion individually abut against the cam surface and to be operated by the rotation of the respective cam. In the switching timer, the first switch and the second switch are arranged so that they are operated alternately by the two synchronously rotating cams, and the closing time of each time of the switch is increased. A switching timer characterized in that the switching timer is further equipped with means for relatively displacing the position of the cam and the position of the switch so as to be able to switch to a minor key.