JPH0129288B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] In the present invention, a dial that rotates at a constant cycle has a plurality of setters that step-by-step drive a feed cam that turns on and off a switch, and that cannot be attached or detached and that can be set at any time when a timer is activated. Concerning a timer installed so that it can be set.

[Background technology]

Conventionally, the setter in this type of timer consists of a feed pawl that drives the feed cam step by step outward from an annular portion that rotatably fits around the outer periphery of the central cylindrical portion of the dial, and a setter that engages with a positioning groove provided in the dial. A locking pawl that locks the locking pawl, and an operating section for releasing the locking state of the locking pawl and setting the timer operation time are integrally formed in a protruding manner, and the annular portion of these setters is connected to the central cylindrical portion of the dial. It was arranged around the outer periphery in a rotatable and polymeric manner. These setters consist of an on setter and an off setter, and one on and one off setter.
About three sets are arranged alternately.

Such a timer is very easy to use in applications where the number of on/off operations per rotation of the dial is relatively small, since the setter will not fall off or be lost. However, if two sets of ON and OFF setters are arranged, the ON/OFF operation will always be performed twice for one rotation of the dial (for example, 24 hours), so it is not possible to perform the ON/OFF operation only once. I had the inconvenience of not being able to do that.

[Purpose of the invention]

The object of the present invention is that even if multiple sets of ON and OFF setting elements are installed,
To provide a timer capable of making the number of on/off operations in one rotation of a dial smaller than the number of setters attached.

[Disclosure of the invention]

The present invention has an oval fitting hole in an annular part of a setter which is rotatably arranged on the outer periphery of the central cylindrical part of the dial in an overlapping manner, so that the setter can be displaced in the radial direction of the dial. It is characterized by

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Figure 1 shows a plan view and a vertical cross-sectional view of the proposed timer, where 1 indicates a constant period (24 hours in the example).
2 is a feed cam that turns the switch on and off, and 3, 4, 5, and 6 are setters that drive the feed cam 2 step by step.

The dial 1 has a through hole 1 in the center as shown in Figure 2.
A and a central cylindrical portion 1c projecting downward from the disk-like base portion 1b are integrally formed. Further, a scale plate recess 1d is provided on the surface of the disc-shaped base 1b, and a scale plate 8 having scales and time numbers for setting the timer operation time is attached in the circumferential direction. On the other hand, a scale plate 8 is provided on the back surface of the disc-shaped base 1b.
Serrated grooves 1e corresponding to the scale (96 in the example)
A circumferential groove 1g is formed on the outer periphery near the outer end of the dial 1, and further on the inner periphery thereof, with a circumferential partition wall 1f interposed therebetween. This peripheral partition wall 1f has a disc-shaped base 1
The sawtooth groove 1e side rises at right angles to b, and the circumferential groove 1g side rises gently with an inclined surface.

The feed cam 2 is located outside the rotation locus of a setting element, which will be described later, and has an off-cam part 2a and an on-cam part 2b, each of which has a circumference divided into four parts, stacked on top of each other with a predetermined angle shift. (not shown) are integrally formed and rotatably arranged. A plurality of switch springs supported in a cantilever manner are housed in the switch chamber 9, and the tips of the springs are turned on and off by following the switch operating cam, but since this structure is well known, a detailed explanation will be omitted.

For setters 3, 4, 5, and 6, 3 and 4 are for off, 5,
6 is for ON and is attached to the dial 1 in such a manner that it cannot be attached or detached and can be set to any desired timer operation time. These setters have substantially similar shapes. For example, as shown in FIG. It consists of a feeding claw 5c, a locking claw 5d, and an operating part 5e, which are integrally formed and protrude from each other. The feed pawl 5c engages with the on-cam portion 2b of the feed cam 2 when the dial 1 rotates, thereby driving the feed cam 2 step by step. The locking claw 5d is the dial 1
The outer side thereof has an inclined surface corresponding to the gradual rise of the peripheral partition wall 1f of the dial 1. The operation part 5e has a U-shape that grips the outer peripheral end of the dial 1 together with a thin protrusion 5f from the annular part 5b forming a locking pawl 5d, and has an instruction mark 5g and an on-point mark on its outer surface. An "enter" character is added to indicate that it is a setter. The setters 3, 4, 5, and 6 are attached to the respective annular portions 3.
b, 4b, 5b, and 6b are rotatably arranged around the outer periphery of the central cylindrical portion 1c of the dial 1 in a superimposed manner as shown in FIG.
c, the locking claw 5d and the operating part 5e need to have a positional relationship in which they engage, lock or grip the feed cam 2 and the dial 1 at predetermined locations, so the respective annular parts 3b, 4b, 5b seen from the side. , 6b are formed with their longitudinal positions sequentially shifted.

Furthermore, to explain the shape of the fitting hole in the annular part of each setter, the shape of this fitting hole is the same for each setter, and the fitting hole 5a
It forms an ellipse with a larger diameter in the line direction connecting the center of the locking claw 5d and the locking claw 5d. That is, dial 1
The centers o ₁ and o ₂ of a semicircle with a radius equal to the radius r of the central cylindrical part 1c are located a predetermined distance L apart,
The semicircle drawn by the centers o ₁ and o ₂ is an ellipse.

This predetermined distance L is the amount of displacement of each setting element in the radial direction of the dial 1 when each setting element is attached to the dial 1, and is the amount of displacement of each setting element in the radial direction of the dial 1.
c, 5c, and 6c are set so as to ensure the amount of displacement from the position where the feed cam 2 is normally driven step by step to the position where the feed cam 2 cannot be driven step by step. Furthermore, the radial dimensions of the serrated groove 1e and the circumferential groove 1g of the dial 1 are determined according to this predetermined distance L, and the positions at which the respective feed claws 3c, 4c, 5c, and 6c drive the feed cam 2 step by step are determined. When each locking claw 3
d, 4d, 5d, 6d are locked in the sawtooth grooves 1e,
When the feed cam 2 is in the position where it is not driven step by step, each of the locking claws 3d, 4d, 5d, and 6d is located within the circumferential groove 1g.

Then dial each setter 3, 4, 5, 6 to 1.
The holding plate 10 is fitted onto the outer periphery of the central cylindrical portion 1c in sequence, and the presser plate 10 is fixed to the end surface of the central cylindrical portion 1c with screws 11. Therefore, each setter is disposed on the dial 1 so as to be rotatable and displaceable in the radial direction of the dial 1 in an overlapping manner.

Reference numeral 12 denotes a dial bush, which fixes the dial 1 and the dial gear 13, loosely fits into the dial shaft 15 erected on the base plate 14, and further fixes the dial shaft 15 to the dial shaft 15.
The washer 16 is also fixed with a screw 17 to prevent it from falling off. The dial gear 13 is connected to the motor via a reduction gear train including a clutch mechanism. 18 is a dial cap that hides the screw 17.

Reference numeral 19 denotes a switching shaft for manually turning the switch on and off, and a gear 19a provided in the middle of this shaft meshes with a manual gear 2c of the feed cam 2.

Reference numeral 20 indicates an upper case, and 21 indicates a lower case, in which the motor, switch, reduction gear train, load connection receiving blade 22, power supply plug 23, and other components necessary for the timer are housed. The dial 1 with the setter attached is the dial shaft 1 protruding from the upper case 20.
5, but is protected by a cylindrical outer wall 24 formed on the upper surface of the upper case 20 and is covered with a transparent cover 25 for further secure protection. In addition, a current time indication mark 26 is provided on the surface of the upper case 20 near the dial 1.
A load plug insertion hole 27 is provided at a position corresponding to the load connection receiving blade 22.

Setting of the timer operation time in such a timer will be explained. In FIG. 1, the switch is turned on by the setter 6 at 3 p.m., and the switch is turned off by the setter 3 at 6 p.m., but the setters 4 and 5 do not turn the switch on or off. Then another 6am
If you want to turn on the switch at 12:00 a.m. and turn it off at 12:00 a.m., push down the operating parts 5e and 4e of setters 5 and 4, and then pull them out in the radial direction of dial 1 so that they correspond to the scales on scale plate 8. That's fine. That is, as a result of this operation, the protrusions 5f, 4f of the locking claws 5d, 4d located in the circumferential groove 1g are bent, and the locking claws 5d, 4d go over the circumferential partition wall 1f and enter the sawtooth groove 1.
The setting is completed when it is locked to e. In addition, if you want to prevent the switch from turning on and off at 3:00 pm and 6:00 pm,
e and 6e should be pushed down once and then pushed inward in the radial direction of the dial 1. That is, as a result of this operation, the locking pawls 3d and 6d that were locked in the sawtooth groove 1e are disposed of as the protrusions 3f and 6f are bent and the locking claws 3d and 6d are moved over the peripheral partition wall 1f to be located in the peripheral groove 1g. Ru.

By displacing each setting element in the radial direction of the dial in this manner, it is possible to perform the on/off operation of the switch by the number of setting elements or less than the number of setting elements.

In this embodiment, two sets of ON and OFF setters are provided, but the present invention is not limited to this. Alternatively, the feed cam may be located inside the rotation locus of the setting element. In this case, the circumferential groove of the dial is provided on the outer periphery near the outer end, and the serrated groove is provided on the inner periphery, and the setting element is When the setter is pulled outward in the radial direction of the dial, the setting element becomes unable to drive the feed cam step by step, and the timer setting is canceled. Furthermore, since the main point of the present invention lies in the configuration of the dial, feed cam, and setter,
Other members can be changed as appropriate.

〔Effect of the invention〕

As described above, in the present invention, the setter is integrally provided with an annular portion having an oval fitting hole, and the annular portion is rotatable around the outer periphery of the central cylindrical portion of the dial and in the radial direction of the dial. They are disposed in a superimposed manner in a displaceable state, so that when the annular portion is displaced in one direction in the radial direction of the dial, the setter provided with the annular portion cannot drive the feed cam step by step. Therefore, even if multiple sets of ON and OFF setting elements are installed, the number of ON/OFF operations in one rotation of the dial is not only equal to the number of installed setting elements, but also less than the number of setting elements. It is possible to provide an easy-to-use timer that makes it possible to

[Brief explanation of drawings]

Figures 1a and 1b show an embodiment of the present invention.
a is a plan view, b is a vertical cross-sectional view, Figure 2 a, b, and c show the dial; a is a cross-sectional view, b is a plan view, c is an A-A cross-sectional view at b, and Figure 3 a ,b
4 shows the setter, a is a plan view, b is a side view, and FIG. 4 is a side view including a sectional view showing the main parts thereof. 1...Dial, 2...Feed cam, 3, 4,
5, 6... setter.

Claims (1)

[Claims] 1. In a timer in which a plurality of setters that drive a feed cam that turns on and off a switch step by step are attached to a dial that rotates at a constant cycle in a non-removable manner and can be set to an arbitrary timer operation time, the above-mentioned The setter is integrally provided with an annular portion having an oval fitting hole, and the annular portion is rotatable around the outer periphery of the central cylindrical portion of the dial and is movable in the radial direction of the dial. 1. A timer characterized in that the setter provided with the annular portion cannot drive the feed cam step by step when the annular portion is displaced in one direction in the radial direction of the dial.