JPH0312197Y2 - - Google Patents

Description

[Detailed description of the invention] The invention of the present application aims to solve the following problems.

(Industrial Application Field) This invention relates to a time switch that can control power supply to a load in two ways: continuous and intermittent.

(Prior Art) When performing two types of control as described above, it is possible to separately provide a select switch for selecting continuous energization and intermittent energization, and an intermittent timer for controlling intermittent energization. I was worried. For this reason, home appliance manufacturers have to manage these two parts, the select switch and the intermittent timer, and when assembling them into home appliances, they not only have to install each of these two parts, but also wire them together. is also required,
There was a problem in that these tasks required a great deal of effort.

(Problems to be solved by the invention) This invention aims to eliminate the above-mentioned conventional problems and provide a time switch that can perform two types of control, continuous energization and intermittent energization, with one component. It is something.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) When the operating body is moved in one direction, the first contact plate is pushed up and separated from the third contact plate, and continuously contacts the second contact plate. When one operating body is moved to the other, the push-up is released, the first contact plate comes into contact with the third contact plate, and the second contact plate operates following the rotation of the intermittent cam. Contact and separation with respect to one contact plate are repeated.

(Example) Below, drawings showing examples of the present application will be described. Reference numeral 1 denotes a case, which consists of a main body 2 and a lid 3.
Reference numeral 4 denotes a shaft body integrally formed with the main body, and has a coaxial bearing hole 5 in the center part. 6 indicates a bearing hole formed in the lid. Reference numeral 7 denotes a cam drive gear, which has a shaft hole 8 mounted on the shaft body 4 so as to be rotatable. 9 indicates a cam drive piece. Next, 11 is an intermittent cam, and 12 is a quick cam, which are integrally formed with a partition plate 13 interposed between them. Further, these cams have shaft holes 14 mounted on the shaft body 4 so that they can freely rotate relative to the case. Reference numeral 15 denotes an engaging recess in which the driving piece 9 is positioned. On the cam surface of the outer periphery of the cam 11, 11a indicates a switch closing portion, and 11b indicates a switch opening portion.
Also, on the cam surface on the outer periphery of the quick cam 12, 1
2a represents a quick lever lifting surface, and 12b represents a quick feeding surface. Next, 16 shows an operating body for switching between continuous energization and intermittent energization. Case 1
(In this example, an example of reciprocating rotation is shown, but a reciprocating sliding structure or a reciprocating push/pull structure may also be used.) The movement width is the width of reciprocating movement between the push-up position shown in FIG. 5 and the non-push-up position shown in FIGS. 3 and 4. In this operation body 16, 17 is an operation shaft, and the bearing hole 5,
It is mounted rotatably relative to 6. A quick release piece 18 has a quick lever push-up surface 18a. Reference numeral 19 indicates a spring plate push-up piece for continuous setting, and 20 indicates a positioning piece. These codes 18, 19, 2
The members indicated by 0 are formed integrally with each other and also with the operating shaft 17. Reference numeral 21 denotes a positioning spring, and both ends thereof are held by holding parts 22, 22 provided on the main body 2. Next 24
is a pinion, which is attached to the rotating shaft of the timer motor attached to the main body 2. 25 is a gear train for deceleration, one end of which is connected to the pinion 24 and the other end connected to the cam drive gear 7 via a linking gear 26. In addition, timer motor, pinion 24, gear train 2
The configuration consisting of 5 is also called a clock mechanism. Reference numeral 28 denotes a quick lever rotatably attached to the main body 2, and its tip 28a is formed in such a width that it can straddle and face the cam surface of the quick cam 12 and the push-up surface 18a of the quick release piece 18. A biasing spring 29 is attached to a holding portion 30 formed on the main body 2, and biases the quick lever 28 toward the cam 12.
Next, 31 indicates a switch. In this, 32
33 is a first contact plate, 33 is a second contact plate, and 34 is a third contact plate, each base part being fixed to the case 2, and contacts 35, 36, and 37 attached to the free ends. 38 is a follower attached to the second contact plate 33;
The cam surfaces of the intermittent cam 11 are movably opposed to each other.

Next, in FIG. 6 showing a circuit of a microwave oven configured using the above-mentioned time switch, 40 is a commercial power supply, 41 is a well-known timer, and the main switch is controlled by a timer motor 42 and its rotation. It has 43. 44 is the time switch described above, and 45 is a timer motor to which the pinion 24 described above is attached. 46 indicates a well-known magnetron.

In the above structure, when the main switch 43 of the timer 41 is closed, the timer motor 42 is activated and the timer 41 is started. In this case, when the operating body 16 is moved to one side, that is, when the operating shaft 17 is set to the intermittent energization position,
As shown in the figure, the spring plate push-up piece 19 is connected to the contact plate 3.
2, and the contacts 35 and 37 of the first contact plate 32 and the third contact plate 34 are in contact with each other. Therefore, the follower 38 of the switch 31 is in a state of being driven by the intermittent cam 11 by the spring force of the second contact plate 33. Further, the circuit at this time is as shown in FIG. 6A, and the timer motor 45 is energized through the first and third contact plates 32 and 34 to rotate. The rotational force of the timer motor 45 is transmitted from the pinion 24 to the deceleration gear train 25 and the gear 2.
6 to the gear 7. The rotational force is transmitted to the intermittent cam 11 via the drive piece 9 and the engagement recess 15.
is transmitted, and the intermittent cam 11 rotates. Therefore, as shown in FIG. 3, when the follower 38 rides on the switch opening portion 11b of the intermittent cam 11, the contacts 35 and 36 are separated, and the intermittent switch (first and second
(Switch composed of contact plates 32 and 33)
is opened (for example, for 13.5 seconds), and the follower 38 is in the state where the switch closing portion 11 is closed as shown in FIG.
contact 3 due to the spring force of the contact plate 33.
5 and 36 are in contact and the intermittent switch is closed (for example, for 16.5 seconds), which is repeated. in this case,
When the intermittent switch changes from closing to opening or from opening to closing, the quick cam 1
The quick lever 28, which has been lifted up in advance by the lifting surface 12a at 2, faces the quick feeding surface 12b, whereby the quick cam 12 and the intermittent cam 11 are rapidly rotated, and the above switching is instantaneously performed. Since the intermittent switch is opened and closed intermittently as described above, the magnetron 46 operates intermittently.

On the other hand, when the operating body 16 is moved to the other side, that is, when the operating shaft 17 is set to the continuous energization position, the spring plate push-up piece 1
9 pushes up the first contact plate 32 toward the second contact plate 33. The height of the push-up is such that the second contact plate 33 is pushed up via the first contact plate 32, and the tip of the follower 38 is higher than the rotation locus of the high stage part of the intermittent cam 11, that is, the switch opening part 11b. Push it up to a higher position. As a result, contact between the contacts 35 and 37 is broken, and as is clear from FIG.
6 remains in continuous contact. Also, in this case, the quick lever push-up surface 18a pushes up the quick lever 28 higher than the height of the maximum diameter portion of the quick cam 12. Therefore, the quick lever 28 does not come into contact with the quick cam 12. By keeping the contacts 35 and 36 in contact as described above, the magnetron 46 is continuously energized.
After the above operation, when the time limit set in the timer 41 has elapsed, the main switch 4 is turned off as is well known.
3 opens, and the timer motors 42, 45 and magnetron 46 stop operating.

(Effect of the invention) As described above, in the present invention, when the operating body 16 is moved to one side, the first contact plate 35 can be pushed up and brought into continuous contact with the second contact plate 33. When the operating body 16 is moved to the other side, the push-up is released and the second contact plate 33 is driven by the intermittent cam 11 rotated by the timer motor 45, and the first contact plate 32 and It has the advantage that it can be brought into contact with and separated from the second contact plate 33 repeatedly. This means that one timer switch can perform two types of control: continuous energization and intermittent energization, and it is possible to provide home appliance manufacturers with a device that can perform these two types of control as a single component. This has the effect of greatly simplifying the management of parts and the labor involved in assembling them.

Moreover, in the case of continuous energization control by pushing up the first contact plate 32, it is possible to cut off the contact between the first contact plate 32 and the third contact plate 34, cut off the energization to the timer motor 45, and stop it. This makes it possible to prevent wear and tear on the timer motor 45 and wear and tear on the cam 11 and the driven portion of the contact plate due to sliding between the two, thereby prolonging the life of the time switch.

[Brief explanation of drawings]

The drawings show an embodiment of the present application; FIG. 1 is a partially cutaway perspective view showing the lid in an open state, FIG. 2 is an exploded perspective view, and FIGS. 3 to 5 explain the operating state. Figure 6 is a circuit diagram. 1...Case, 11...Intermittent cam, 31...
Switch, 16...operating object.

Claims (1)

[Scope of utility model registration request] An intermittent cam connected to a timer motor is rotatably mounted on the case, and on the outer periphery of the intermittent cam there are a first contact plate on the side closer to the cam and a second contact plate on the side farther from the cam. The second contact plate has a cam surface of the intermittent cam so that the first contact plate and the second contact plate repeatedly come into contact with and separate from each other as the intermittent cam rotates. Further, the case is provided with an operating body for switching between continuous energization and intermittent energization so as to be movable back and forth. In the state of moving to the side, the operating body pushes up the first contact plate to bring it into continuous contact with the second contact plate,
When the operating body moves to the other side, the first
A third contact plate is set in the case so that when the first contact plate is not pushed up by the operating body, the third contact plate is in contact with the first contact plate, and the first The contact plate is mounted at a position where contact with the first contact plate is broken when the contact plate is pushed up by the operating body, and furthermore, the first contact plate and the third contact are connected to the energizing path for the timer motor. A time switch characterized by intervening in series with a board.