JPS6325639Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a timer device.

For example, a hot air fan that uses combustible materials such as gas or oil as fuel automatically goes from a stopped state to an operating state a certain period of time before you wake up, and then runs for a certain period of time to properly warm the room before returning to a safe state. Therefore, it is automatically turned off and put into a stopped state, and then when the user wants to use it further, it is switched to a continuous operating state by a human operation. A timer device is generally used to perform such a function, and one example of a conventional timer device of this type is one configured as shown in FIGS. 1 and 2. That is, a set shaft 2 is rotatably provided in the casing 1. A plate cam 3 is loosely fitted onto the set shaft 2 so as to be freely rotatable at an appropriate angle. On the peripheral edge of the plate cam 3, two first and second cam surfaces 3a and 3b of a predetermined shape are formed in parallel. Then, on the side of the first cam surface 3a, first, second and third cams which are actuated by the first cam surface 3a and have elasticity themselves are provided.
Three contact plates 4, 5, and 6 are provided in parallel. Further, on the sides of the second cam surface 3b, there are two fourth and fifth contact plates 7, 8 which are actuated by the second cam surface 3b and which are themselves elastic.
(The fifth contact plate 8 is not shown in FIG. 1) are provided in parallel. Note that the first contact plate 4 and the fourth
The contact plate 7 is composed of each piece of a bifurcated contact plate as shown in FIG. A gear 9 is rotatably provided on the set shaft 2. The gear 9 is configured to be able to rotate integrally with the set shaft 2 due to the frictional force generated by the leaf springs 10, 10. Then, when a motor (not shown) is driven,
The gear 9 is rotated via a reduction gear mechanism (not shown), and the plate cam 3 is rotated in one direction at a constant speed via the plate springs 10, 10 and the set shaft 2. In addition, in the stopped state, the first contact plate 4 is positioned in the direction of arrow A by the action of the first cam surface 3a, so that the first, second, and third The contact plates 4, 5, and 6 are both spaced apart, while the fourth contact plate 7 is positioned in the direction of arrow A by its own elastic force due to the action of the second cam surface 3b, and thus As shown in FIG. 3, the fourth and fifth contact plates 7 and 8 are in contact. In addition, 11 in Fig. 3 is a power supply, 1
Reference numeral 2 indicates a motor that rotates the plate cam 3, and 13 indicates a hot air fan (load).

Next, the operation of the timer device having the above configuration will be explained with reference to FIG. 4. First, when it is desired to operate the warm air fan 13 on a timer, the set shaft 2 is operated to bring the plate cam 3 to a predetermined rotational position. At this time, a slip occurs between the set shaft 2 and the gear 9, so that only the plate cam 3 rotates together with the set shaft 2. Then, the first contact plate 4 is positioned in the direction of arrow B by the action of the first cam surface 3a,
As a result, the distance between the first and second contact plates 4 and 5 and the second
and the third contact plates 5 and 6 are both turned on, and the fourth contact plate 7 is positioned in the direction of arrow B by the action of the second cam surface 3b, and the fourth and fifth contacts The area between the plates 7 and 8 is turned on. Therefore,
The motor 12 is driven as indicated by the symbol P in FIG. 4, and the plate cam 3 is rotated in one direction accordingly.
When the plate cam 3 rotates by a predetermined amount, the fourth contact plate 7 is positioned in the direction of arrow A by the action of the second cam surface 3b, thereby causing a gap between the fourth and fifth contact plates 7 and 8. turns on, and the symbol Q in Figure 4
The hot air fan 13 is put into operation as shown in FIG. Then, when the plate cam 3 further rotates by a predetermined amount, the first contact plate 4 is moved toward the arrow A by the action of the first cam surface 3a.
The first, second,
The third three contact plates 4, 5, and 6 are separated from each other, and both the MOHM 12 and the hot air fan 13 are stopped. At this time, the fourth and fifth contact plates 7 and 8 are in contact, but as the first and second contact plates 4 and 5 are separated from each other and are in the OFF state,
The power supply from the power source 11 is cut off, and the hot air fan 13 is stopped. Therefore, if the time required for the portion indicated by the symbol P in FIG. 4 is set to be, for example, 12 hours, and the time required for the portion indicated by the symbol Q in the same figure is, for example, one hour, the timer set time can be set to a maximum of 12 hours. Therefore, the timer operation time of the warm air fan 13 becomes 1 hour. In addition, when it is desired to operate the warm air fan 13 continuously, when the plate cam 3 reaches a predetermined rotational position by operating the set shaft 2, the first contact plate 4 is rotated by the action of the first cam surface 3a. The position is placed in the middle of the movement range, thereby bringing the first and second contact plates 4 and 5 into the ON state, and the fourth contact plate 7 and the fifth contact plate 8 are in the same state as the stopped state. (that is, the contact state), and thus the hot air fan 13 is continuously operated as indicated by the symbol S in FIG. In addition,
The part indicated by the symbol T in FIG. 4 is the range in which the setting shaft 2 cannot be set.

However, in the case of such a conventional timer device, five contact plates are used, and these are divided into two sets, and in order to reduce the size in the direction perpendicular to the set axis, the two sets of contact plates are divided into two sets. They are arranged in parallel on one side of the cam, and in order to simplify the wiring, two of the contact plates are made from each piece of a bifurcated contact plate, so the direction along the set axis The disadvantage was that it became larger. To explain this specifically with respect to the conventional example shown in Fig. 1, in order to take manufacturing and assembly errors into consideration and prevent malfunctions, the width L ₁ of the contact plate must be 3 mm,
The distance L ₂ between the contact plates was 2.5 mm, resulting in a total of 8.5 mm, and it was not possible to make it any smaller. Note that the distance _L3 of the internal space of the casing 1 is 17 mm.

This idea was made in view of the above circumstances,
To provide a timer device which can be miniaturized not only in the direction perpendicular to the set axis and simplify wiring, but also in the direction along the set axis.

An embodiment of this invention will be described below with reference to FIGS. 5 to 7. Note that the same parts as in the conventional example described above are given the same reference numerals, and the explanation thereof will be omitted. In this embodiment, two first and second plate cams 21 and 22 are loosely fitted onto the set shaft 2 so as to be freely rotatable at an appropriate angle. Note that these plate cams 21 and 22 may be integrally formed of synthetic resin. In addition, four contact plates 26, 23, 24, 25, ie, fourth, first, second, and third, each having elasticity.
are provided sequentially and in parallel. Note that the width L ₄ of the second contact plate 24 is twice the width L ₅ of the other first, third, and fourth contact plates 23 , 25 , and 26 .
Then, on the side of the first plate cam 21, this first
A first contact plate 23 that is operated by the cam surface of the plate cam 21 is disposed on the side of the second plate cam 22, and is operated by the cam surface of the second plate cam 22. A second contact plate 24 is arranged. In addition, in the stopped state, the first contact plate 23 is positioned in the direction of arrow A by the action of the first plate cam 21, so that the first and second contact plates 23 are positioned in the direction of arrow A as shown in FIG. , 24 are spaced apart and the first and fourth contact plates 2
3 and 26 are in the on state, and on the other hand, the tips of the second contact plate 24 and the third contact plate 25 are engaged with the casing 1, and therefore, as shown in FIG. No. 3 contact plates 24 and 25 are spaced apart.

Next, the operation of the timer device having the above configuration will be explained with reference to FIG. 8. First, if you want to operate the warm air fan 13 on a timer, operate the set shaft 2 to bring both plate cams 21 and 22 to a predetermined rotation position, and the second contact point will be opened by the action of the second plate cam 22. The plate 24 is positioned in the direction of arrow B, thereby turning on the second and third contact plates 24 and 25, and the action of the first plate cam 21 causes the first contact plate 23 to move in the direction of the arrow B. This causes the first and second contact plates 23 and 24 to be separated from each other, and the motor 12 is driven as shown by the symbol P in FIG. 2
1 and 22 are rotated in one direction. Then, when both plate cams 21 and 22 rotate by a predetermined amount, the first contact plate 23 is positioned in the direction of arrow A by the action of the first plate cam 21, and thereby the first and fourth contact plates 23 , 26 are turned on, and the warm air fan 13 is put into operation as indicated by the symbol Q in FIG. At this time, the hot air fan 13 is operated at the second, third, fourth, and first
It is electrically connected to the power source 11 via the contact plates 24, 25, 26, and 23 in this order. Then, when both plate cams 21 and 22 further rotate by a predetermined amount, the second contact plate 24 moves toward the arrow A due to the action of the second plate cam 22.
As a result, the second and third contact plates 24 and 25 are separated from each other, and the motor 12 is stopped as indicated by the symbol R in FIG. Also, by separating the second and third contact plates 24 and 25 from each other, the first and fourth contact plates 23 and 26
Even if the hot air fan 13 is in the on state, the power supply to the hot air fan 13 is cut off, and therefore the hot air fan 13 also stops at the portion indicated by the symbol R in FIG.

Next, if you want to operate the warm air fan 13 continuously,
When the set shaft 2 is operated to bring both plate cams 21 and 22 to a predetermined rotational position, the first contact plate 23 is positioned in the direction of arrow B by the action of the first plate cam 21, and this The first and fourth contact plates 23,
26 are separated from each other, the contact between the first and second contact plates 23 and 24 is turned on, and the hot air fan 13 is continuously operated as indicated by the symbol S in FIG. At this time, the hot air fan 13 is electrically connected to the power source 11 via the second and first contact plates 24 and 23. Note that the part indicated by the symbol T in FIG. 8 is the range in which the setting shaft 2 cannot be set.

In this way, the control itself of the motor 12 and the hot air fan 13 is the same as the conventional one, but in this embodiment, four contact plates are used, and one of these contact plates is made wider, and these contact points are Because the plates are arranged in parallel on one side of the plate cam,
The size can be reduced in the direction perpendicular to the set axis, the wiring can be simplified, and further the size can be reduced in the direction along the set axis. Here, the fifth step is to reduce the size along the set axis.
To specifically describe the embodiment shown in the figure, the width L ₅ of the large contact plate, that is, the second contact plate 24, is 6 mm.
If this is the case, malfunctions will not occur even if manufacturing and assembly errors are considered, and therefore the length in the direction along the set axis can be reduced by about 2.5 mm compared to the conventional example shown in Figure 1. I can do it.

Next, another embodiment of this invention will be described with reference to FIGS. 9 and 10. Note that parts with the same names as those in the above embodiment are given the same reference numerals, and a description of some of them will be omitted. In this example, the second
A lever 31 is attached to a pin 32 on the side of the plate cam 22.
It is rotatable around the center. The second contact plate 24 is operated by the cam surface of the second plate cam 22 via the lever 31. Note that the first and second plate cams 2
Steps 21b and 22b are provided in part of the peripheral edge portions 21a and 22a of Nos. 1 and 22, respectively. Further, the protrusion 33 provided on the set shaft 2 is connected to the arcuate groove 3 provided on the first and second plate cams 21 and 22, respectively.
4 and 35 with an appropriate play, the first and second plate cams 21 and 22 are loosely fitted to the set shaft 2 so as to be rotatable at an appropriate angle. Further, a gear 9 is provided on the set shaft 2 so as to rotate integrally therewith. Although not shown, a slip mechanism made of a leaf spring or the like is provided in the pinion section interposed between the gear 9 and the reduction gear mechanism.

Next, the operation of the timer device having the above configuration will be explained. Note that FIG. 10 shows a stopped state. If you want to operate the warm air fan on a timer first from this state, turn the set shaft 2 in the direction of arrow C to bring both plate cams 21 and 22 to the predetermined rotational position. The lever 31 is pushed up by the peripheral edge 22a, and this lever 31 is further pushed up.
As the second contact plate 24 is pushed up by By the first contact plate 2
3 is pushed up, the first contact plate 2
3 is separated from the fourth contact plate 26, and the motor is driven to move both plate cams 21 and 22 in the direction of arrow D.
rotated in the direction And both plate cams 21, 22
When rotates by a predetermined amount, the step 2 of the first plate cam 21
1b, the first contact plate 23 falls into contact with the fourth contact plate 26 due to its own elastic force, and the space between them is turned on, and the hot air fan is put into operation. And both plate cams 21,
22 further rotates by a predetermined amount, the second plate cam 2
When the lever 31 falls into the second step 22b, the second contact plate 24 returns to its original position due to its own elastic force and is separated from the third contact plate 25, cutting off the power to the motor and the hot air fan. The hot air fan stops.

Next, if you want to operate the hot air fan continuously, turn the set shaft 2 in the direction of arrow D to remove both plate cams 21 and 22.
When the cam reaches a predetermined rotational position, the first plate cam 2
As the first contact plate 23 is pushed up by the first peripheral edge 21a, the first contact plate 23 is separated from the fourth contact plate 26 and then comes into contact with the second contact plate 24. is turned on, and the hot air fan is operated continuously.

Therefore, in this embodiment as well, effects similar to those of the above embodiment can be obtained. Moreover, in this embodiment, the distance L ₆ of the internal space of the casing 1 is 10
It can be mm.

As explained above, according to the timer device of this invention, four contact plates are used, one of the contact plates is made wider, and these contact plates are arranged in parallel on one side of the plate cam. Therefore, it is possible not only to reduce the size in the direction perpendicular to the set axis and simplify the wiring, but also to reduce the size in the direction along the set axis. In addition, when the hot air fan is operating in the timer operation state, the power source is connected by contacting between the first and fourth contact plates while the power source and the timer motor are still connected through the second and third contact plates. is connected to the hot air fan via the second, third, fourth, and first contact plates, and during continuous operation, the power source is connected to the hot air fan through between the first and second contact plates. Since the power supply circuit to the hot air fan is separated into separate systems for timer operation and continuous operation, the warm air fan is activated and the timer motor is always activated during timer operation. This allows the warm air fan to have a circuit configuration that relies on the timer motor, which allows the timer motor to stop and the hot air fan to reliably stop operation after a certain period of time. The hot air fan can be operated by a power supply circuit separate from the circuit, and therefore safety and reliability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing an example of a conventional timer device, Fig. 2 is a perspective view of its contact plate, Fig. 3 is its circuit diagram, and Fig. 4 is the rotation of the plate cam shown in Fig. 1. A diagram illustrating the contact and separation states between the first, second, third, fourth, and fifth contact plates corresponding to their positions, and FIG. 5 is a cross section of the main part showing an embodiment of the timer device according to this invention. 6 is a perspective view of the contact plate, FIG. 7 is a circuit diagram thereof, and FIG. 8 shows the first, second, and FIG. 9 is a diagram illustrating the state of contact and separation between the third and fourth contact plates; FIG.
FIG. 0 is a sectional view taken along the line X--X in FIG. 9. 2... Set shaft, 11... Power supply, 12... Timer motor, 13... Warm air fan, 21... First plate cam, 22... Second plate cam, 23... First contact plate, 24... Second contact plate, 25... Third contact plate, 26... Fourth contact plate, 31... Lever,
32...Pin.

Claims (1)

[Scope of Claim for Utility Model Registration] Switchable between a timer operation state in which a warm air fan that uses combustible material as fuel is automatically operated for a certain period of time from a stopped state for a predetermined time, and a continuous operation state in which the hot air fan is continuously operated. In the timer device configured, two plate cams, a first and a second plate cam, are provided on the set shaft,
A fourth contact plate, a first contact plate, a second contact plate, and a third contact plate are provided in parallel in sequence, and the width of the second contact plate among these contact plates is increased, and the width of the second contact plate is increased, and the width of the second contact plate is increased. the second contact plate is operated by the cam surface of the first plate cam, and the second contact plate is operated by the cam surface of the second plate cam directly or via a lever rotatably provided around a pin; A first state in which only the second and third contact plates are in contact; and a second state in which the second and third contact plates are in contact and the first and fourth contact plates are in contact. situation,
a third state in which only the first and fourth contact plates are in contact; a fourth state in which only the first and second contact plates are in contact; and the first, second, third, and fourth states. The hot air fan is connected to the first contact plate, the power source is connected to the second contact plate, the A timer motor is connected to each of the third contact plates, and the third contact plate and the fourth contact plate are connected to each other.
A switch circuit is formed by electrically connecting the contact plate of the second and third contact plates, while a power supply circuit that electrically connects the power source and the hot air fan is connected while the second and third contact plates are in contact with each other. Two systems: a connection mode during operation of the hot air fan in a timer operation state in which the first and fourth contact plates are in contact, and a connection mode during continuous operation in which the first and second contact plates are in contact. A timer device characterized by being separated into two.