JPS635159Y2 - - Google Patents

Description

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

For example, a hot air fan automatically switches from operating to stopped after a certain period of time has passed after going to sleep, and on the other hand, automatically switches from stopped to operating after a certain period of time before waking up. 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 to 3. It is being That is, a set shaft 2 is rotatably provided in the casing 1. Two plate cams 3 and 4, a first plate cam and a second plate cam 4, are loosely fitted onto the set shaft 2 so as to be rotatable at appropriate angles. As driven nodes of the first plate cam 3, first and second contact plates 5 and 6 (the second contact plate 6 is not shown in FIG. 1), which are themselves elastic, are arranged in parallel. It is set in. Further, as driven joints of the second plate cam 4, three contact plates 7, 8, and 9, ie, third, fourth, and fifth contact plates each having elasticity, are provided in parallel. The first contact plate 5 and the third contact plate 7 are each made of a bifurcated contact plate, as shown in FIG. Said set shaft 2
A gear 10 is rotatably provided. The gear 10 is configured to be able to rotate integrally with the set shaft 2 due to the frictional force of the leaf springs 11, 11. When the motor 12 is driven, the gear 10 is rotated via a reduction gear mechanism and pinion 13 (not shown), and the plate cams 3 and 4 are rotated at a constant speed in the direction via the plate springs 11 and 11 and the set shaft 2. is being done. In addition, in the stopped state, the first plate cam 3 acts to
The contact plate 5 is positioned in the direction of arrow A, and therefore the first and second contact plates 5 and 6 are separated from each other, while the third contact plate 7 is positioned in the direction of arrow B by its own elastic force, so that the third, fourth, and fifth contact plates 7, 8, and 9 are spaced apart from each other. In addition, in Figure 3, 14 is the power supply, and 15 is the hot air fan (load).
shows.

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 15 for a certain period of time after resting, the set shaft 2 is operated to bring the plate cams 3 and 4 to predetermined rotational positions. At this time, a slip occurs between the set shaft 2 and the gear 10, so that only the plate cams 3 and 4 rotate together with the set shaft 2. Then, the third contact plate 7 is positioned in the direction of arrow A by the action of the second plate cam 4, thereby causing a gap between the third and fourth contact plates 7 and 8 and between the fourth and fifth contact plates. 8 and 9 are both turned on, and therefore, as shown by the symbol P in FIG. 4, the motor 12 is driven and the hot air fan 15 is
becomes operational. When the plate cams 3 and 4 rotate a predetermined amount in one direction by the drive of the motor 12,
Due to the action of the second plate cam 4, the third contact plate 7 is positioned in the direction of arrow B by its own elastic force, and thereby the third, fourth, and fifth contact plates 7,
8 and 9 are separated from each other, and therefore, both the motor 12 and the hot air fan 15 are stopped, as shown by reference numeral Q in FIG.

On the other hand, if you want to operate the hot air fan 15 a certain time before you wake up, you can operate the set shaft 2 to bring the plate cams 3 and 4 to the predetermined rotational position, and the second plate cam 4 will operate. As a result, the third contact plate 7 is positioned in the middle of the moving range, and as a result, the connection between the third and fourth contact plates 7 and 8 is turned on, and therefore the motor is turned on as shown by the symbol R in FIG. 12 is driven. When the plate cams 3 and 4 rotate a predetermined amount in one direction by the drive of the motor 12, the third contact plate 7 is positioned in the direction of arrow B by its own elastic force due to the action of the second plate cam 4. As a result, the third and fourth contact plates 7 and 8 are separated, and by the action of the first plate cam 3, the first contact plate 5 is positioned in the direction of arrow B by its own elastic force. As a result, the connection between the first and second contact plates 5 and 6 is turned on, and as a result, the motor 12 is stopped and the hot air fan 15 is put into operation as shown by the symbol S in FIG.

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 in detail with respect to the conventional example shown in Fig. 1, in order to take into account manufacturing and assembly errors and prevent malfunctions, the width _L1 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.

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 9. 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, the peripheral edge portions 21a, 22a of the first and second plate cams 21, 22 have first step portions 21b, 22b having an appropriate depth, and a further appropriate depth than the first step portions 21b, 22b. Deep second step portions 21c and 22c are provided respectively. Then, from the peripheral edge 21a of the first plate cam 21,
The second stepped portion 22c of the plate cam 22 is formed to have a large diameter. Note that the plate cams 21 and 22 may be integrally formed of synthetic resin. On the other hand, three contact plates 23, first, second, and third, each having elasticity,
24 and 25 are sequentially provided in parallel. Note that the width L ₃ of the second contact plate 24 is different from that of the other first and third contact plates.
It is twice the width _L4 of the contact plates 23 and 25.
The first contact plate 23 is a driven joint of the first plate cam 21, and the second contact plate 24 is a driven joint of the second plate cam 22. This first
The first plate cam 2 is located in the middle of the contact plate 23.
A bent portion 23a that contacts the outer periphery of the first contact plate 23 is formed over the entire width direction of the first contact plate 23, and a bent portion 23a that contacts the outer circumference of the first contact plate 2
A bent portion 24a smaller than the bent portion 23a is formed across the entire width of the second contact plate 24 at a position opposite to the bent portion 23a of the second contact plate 24. In addition, in the stopped state (first state),
As shown in FIG. 8A, the first contact plate 23 is positioned in the direction of arrow B due to its own elastic force, and its bent portion 23a touches the second stepped portion 21c of the first plate cam 21. The second contact plate 24 is positioned in the direction of arrow B by its own elastic force, and its bent portion 24a is depressed into the first stepped portion 22b of the second plate cam 22. Furthermore, the third contact plate 25 is positioned in the direction of arrow B by its own elastic force, and its tip engages with the casing 1, so that the first, second,
The third contact plates 23, 24, 25 are spaced apart.

Next, the operation of the timer device having the above configuration will be explained with reference to FIG. 9. First, if you want to operate the warm air fan 15 for a certain period of time after taking a break, set the set shaft 2.
When turned in the direction of arrow D to the state (second state) shown in FIG.
3a is pushed up, the first contact plate 23 is positioned in the direction of arrow A and comes into pressure contact with the second contact plate 24, and the second contact plate 24 is further pushed up by the first contact plate 23. By being pushed up, the second contact plate 24 is positioned in the direction of arrow A and comes into pressure contact with the third contact plate 25. Then, both the first and second contact plates 23 and 24 and the second and third contact plates 24 and 25 are turned on, and the motor 12 is driven as indicated by P in FIG. At the same time, the warm air fan 15 becomes operational. Then, the plate cams 21 and 22 are driven by the motor 12.
rotates a predetermined amount in one direction, that is, in the direction of arrow C, and
In the stopped state shown in FIG. A, both the motor 12 and the hot air fan 15 stop, as shown by the symbol Q in FIG.

On the other hand, if you want to operate the warm air fan 15 a certain period of time before you wake up, turn the set shaft 2 in the direction of arrow C to the state (third state) shown in FIG. By pushing up the bent portion 24a of the second contact plate 24 by the peripheral edge 22a of the cam 22, the second contact plate 24 is positioned in the direction of arrow A and comes into pressure contact with the third contact plate 25. ,
Furthermore, the bent portion 23a of the first contact plate 23 is pushed up by the first stepped portion 21b of the first plate cam 21, so that the first contact plate 23 is positioned in the middle of the movement range. Then, the connection between the second and third contact plates 24 and 25 is turned on, and the motor 12 is driven as indicated by the symbol R in FIG. Then, the plate cam 2 is driven by the motor 12.
1 and 22 rotate by a predetermined amount in one direction, that is, in the direction of arrow C, and reach the state shown in FIG. As the bent portion 24a of the plate 24 falls down due to its own elastic force, the second contact plate 24
is separated from the third contact plate 25 and the first contact plate 23
press against. Then, the first and second contact plates 23,
24 is in the on state, so the symbol S in FIG.
As shown by , the motor 12 stops and the hot air fan 15 becomes operational.

In this way, the control itself of the motor 12 and hot air fan 15 is the same as the conventional one, but in this embodiment, three contact plates are used, and one of these contact plates is made wider. Since the contact plate is arranged in parallel on one side of the plate cam, it is possible to reduce the size in the direction perpendicular to the set axis, simplify the wiring, and further reduce the size in the direction along the set axis. Miniaturization can be achieved. Here, to specifically describe the embodiment shown in FIG. 5 for downsizing in the direction along the set axis, the width L ₃ of the large contact plate, that is, the second contact plate 24, is reduced to 6.
mm, no malfunction will occur even if manufacturing and assembly errors are taken into account.Therefore, compared to the conventional example shown in Fig. 1, the length in the direction along the set axis is 2.5 mm.
It can be made to a lesser extent.

In the above embodiment, a case where this invention is applied to a timer device for a hot air blower has been described, but it is needless to say that the present invention is not limited to this.

As explained above, according to the timer device of this invention, three 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. Because of the arrangement, 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. Further, each bent portion formed at the intermediate portion of the first and second contact plates is formed over the entire width direction of each contact plate, and the bent portion of the first contact plate is closer to the second contact point. Since the bent portions of the plates are small, when the first and second plate cams come into contact with each bent portion, the first and second contact plates curve smoothly and reliably, and each contact point is bent smoothly and reliably. The contact points of the plates are pressed together smoothly and there is no contact failure, and when the contact plates are spaced apart, the first and second
Even if the spacing between the contact plates is set narrow, the contact plates do not come into contact with each other, and malfunctions can be prevented, so the device can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a 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 a diagram showing its time chart.
Fig. 5 is a sectional view showing an embodiment of the timer device according to this invention, Fig. 6 is a perspective view of its contact plate, Fig. 7 is its circuit diagram, and Figs. 8 A to D are for explaining its operation. The figure shown in FIG. 9 is a diagram showing the time chart. 2... Set shaft, 12... Motor, 14... Power supply, 15... Warm air fan (load), 21... First plate cam, 21a... Peripheral portion, 21b... First step portion, 21c... ...Second step part, 22...Second plate cam, 22a...Peripheral part, 22b...First step part, 22c...Second step part, 23...First contact plate, 23a ...Bending portion, 24...Second contact plate, 24a...Bending portion, 25...Third contact plate.

Claims (1)

[Claims for Utility Model Registration] Two plate cams, a first and a second plate cam, are provided on the set shaft,
Three contact plates, first, second, and third, are sequentially provided in parallel, and among these contact plates, the width of the second contact plate is increased, and the first contact plate is connected to the first contact plate.
The second contact plate is a driven joint of the second plate cam, and the first contact plate is a driven joint of the second plate cam.
a first state in which the second and third contact plates are separated from each other and are in an OFF state; a second state in which the first, second, and third contact plates are in contact with each other and are in an ON state; 2. Select either a third state in which only the third contact plate contacts and turns on, or a fourth state in which only the first and second contact plates contact and turns on. The timer device is configured to be switched uniformly, and the first contact plate is provided with a bent portion in the middle portion thereof in contact with the outer periphery of the first plate cam in the width direction of the first contact plate. A bent portion is formed over the entire area and is smaller than the bent portion of the first contact plate at a position of the second contact plate opposite to the bent portion of the first contact plate. A switch circuit is formed over the entire width of the plate, and a load is connected to the first contact plate, a power source is connected to the second contact plate, and a timer motor is connected to the third contact plate. In addition, the outer periphery of the second plate cam includes a peripheral edge, a first stepped part having a smaller diameter than the peripheral edge, and a second stepped part having a smaller diameter than the first stepped part, and the second stepped part has a smaller diameter than the first stepped part.
The outer periphery of the plate cam includes a peripheral edge portion having a smaller diameter than the second step portion of the second plate cam, a first step portion having a smaller diameter than the peripheral edge portion, and a second step portion having a smaller diameter than the first step portion. and a stepped portion, when in the first state, the bent portion of the first contact plate is on the second stepped portion of the first plate cam, and the bent portion of the second contact plate is on the second stepped portion of the first plate cam. The bent portions of the first contact plates are located at the first stepped portions of the second plate cams, and when in the second state, the bent portions of the first contact plates are located at the peripheral edge of the first plate cams, and The bent portions of the contact plates are respectively located at the first stepped portions of the second plate cam,
In the third state, the bent portion of the first contact plate is aligned with the first stepped portion of the first plate cam, and the bent portion of the second contact plate is aligned with the first stepped portion of the second plate cam. The bent portions of the first contact plates are located at the peripheral edge portions of the first plate cam when in the fourth state.
The first and second plate cams are arranged on the set shaft so that the bent portions of the second contact plate are located at the second step portions of the second plate cam, respectively. A timer device characterized by: