JPH0535529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.

(Industrial Application Field) The present invention relates to a time switch, and more particularly, to a time switch including two reversing cams and two reversing switches each driven by a reversing cam.

(Prior art) This type of time switch has a rotatable main shaft connected to a clock mechanism for driving the main shaft, a main cam attached to the main shaft, and a main cam that drives the main switch. A first reversing cam and a second reversing cam, which are respectively rotatable and facing each other, are provided side by side in a plane, and on these reversing cams, a first reversing switch and a second reversing cam, which are respectively arranged in a plane, are provided.
A reversing switch is movably opposed to each other, and a gear train is interposed between the main shaft and the first and second reversing cams for interlocking them.

(Problems to be Solved by the Invention) This conventional time switch has a problem in that the reversing cams and reversing switches lined up as described above occupy a large planar area.

The present invention was made in order to solve the problems (technical problems) of the prior art described above, and by arranging two reversing cams and two reversing switches in an overlapping manner vertically, it is possible to Even if the area can be made small, and even if two inverting switches are overlapped in a plane, both switches are electrically shielded by a gear that is essential as a timer, and there is a The purpose of the present invention is to provide a time switch that can prevent electrical interference between the two switches, and as a result, both switches can be placed close to each other, and the vertical configuration can be made relatively compact. There is.

(Means for Solving the Problems) In order to achieve the above object, the time switch of the present invention has a rotatable main shaft connected to a clock mechanism for driving the main shaft, and a main cam attached to the main shaft. At the same time, a main switch is movably opposed to the main cam, and has a first reversing cam and a second reversing cam that are rotatable, respectively, and these reversing cams have a first reversing switch and a second reversing cam, respectively. In the time switch, the second reversing switch is movably opposed to the first reversing cam, and a gear train is interposed between the main shaft and the first and second reversing cams for interlocking them. The cam and the second reversing cam are disposed vertically in parallel on the same axis in an overlapping manner, and a spur gear for driving both reversing cams in the gear train is interposed between them, and the first reversing cam The switch and the second reversing switch are also arranged vertically in an overlapping manner, and the spur gear is interposed between the first reversing switch and the second reversing switch so as to electrically shield both reversing switches. It was designed to do so.

(Function) The two reversing cams arranged vertically in an overlapping manner occupy only one area in plan view. Also, the two reversing switches arranged vertically in parallel form occupy only one area in plan view.
Therefore, their planar footprint is relatively small.
As both of the reversing cams rotate, the reversing switches that are driven respectively open and close. In this case, the spur gear interposed between both switches electrically shields both switches to prevent electrical interference between them. This allows both switches to be placed close to each other.

(Example) Below, drawings showing examples of the present application will be described. Reference numeral 1 denotes a case, which is constructed by bonding two elements 2 and 3 together. 4 is a main shaft, and 5 is a mainspring whose outer peripheral end is connected to the element 3 and its inner peripheral end is connected to the main shaft 4 via a boss body 6. Next, 7 indicates a gear train for interlocking the main shaft 4 with first and second reversing cams and a speed regulating mechanism, which will be described later. 10, a third pinion 11, a third gear 12, a fourth pinion 13, a fourth gear 14, etc. These gears are made of an insulating material such as polyacetal resin. 15,1
Reference numeral 6 denotes a shaft supporting the gear, which is attached to the case 1. Next, 17 is an escape wheel, and 18 is a balance wheel, which constitute a well-known speed regulating mechanism. The portion consisting of the mainspring 5, tooth train 7, and speed regulating mechanism is also referred to as a clock mechanism. Next, reference numeral 20 indicates a driving body attached to the main shaft 4, and includes a driving piece 21. A main cam 22 is rotatably mounted on the main shaft, and is composed of two cam elements 22a and 22b, and is rotated by the drive piece 21. 23 is cam element 2
2a is a driven piece that is movably opposed to each other, and shaft pieces 25, 25 provided at the base part 24 are rotatably supported by bearings 26, 26 formed on the case elements 2, 3. There is. A stop piece 27 is formed integrally with the driven piece 23 and is opposed to the balance wheel 18. Reference numeral 28 denotes another driven piece which is freely opposed to the cam element 22b, and its annular base portion 29 is rotatably attached to the shaft body 25. Next, the main switch 30 is composed of a contact base 31 attached to the case 1 and a plurality of contact plates 32, 32, 32 supported by the contact base. Next, 33 and 34 indicate a first reversing cam and a second reversing cam, respectively, which are rotatably mounted on the shaft body 16. These cams are each integrally equipped with a half-cylindrical interlocking body 35, while the third pinion 11 and third gear 12, which are integrally formed with each other, are similarly provided with a half-cylindrical interlocking body. 37, 37 are integrally provided, and the engagement surface 36 of the interlocking body 35 and the engagement surface 38 of the interlocking body 37 engage with each other, so that the third pinion 11
The rotational force is transmitted to each reversing cam 33, 34. Next, 41 and 42 are the first and second reversing switches, which are the contact blocks 4 attached to the case 1, respectively.
3, a plurality of contact plates 44 supported by the switch, and contacts 45 attached to the contact plates, and the contact plate 44 of each switch includes a first reversing cam 33 and a second reversing cam 33, as shown in the figure. They are brought into contact with the cams 34 so that they can be individually driven.

In the case of the above configuration, when the main shaft 4 is manually rotated to a desired time point, the boss body 6
At the same time, the main cam 22 is rotated via the drive piece 21, and the main switch 30 is activated. Also, stop piece 2
7 moves away from the balance wheel 18. When the main shaft 4 is released from the main shaft 4 in this state, the main shaft 4 moves to the mainspring 5.
The urging force causes the main shaft 4 to rotate in the return direction, and the rotation force is transmitted to the speed regulating mechanism via the gear train 7, and the operation of the speed regulating mechanism causes the main shaft 4 to rotate in the return direction at a constant speed. controlled. In this state, the rotating force of the main shaft 4 due to the mainspring 5 is transmitted to the reversing cams 33, 3 through the gears 8, 9, 10, 11.
4, and these reversing cams rotate at a faster speed than the main shaft 4. Those reversing cams 33, 34
As a result of the rotation, the reversing switches 41 and 42 each perform a predetermined operation. In this case, even if an arc is generated from the contact 45 of each reversing switch, the arc cannot become entangled with the contact 45 of the other reversing switch. )12. When the set time period elapses while the above-described operation continues, the driven pieces 23 and 28 fall into the rest portions (recesses) of the respective cam elements 22a and 22b, and the main switch 30 is opened. Also, the stop piece 27 contacts the balance wheel 18 to stop its operation. This causes the timer to stop.

Next, as shown in FIG. 5, the time switch has the gear train 7 disposed in the middle part in the vertical direction, the main cam 22, the main switch 30, and the mainspring 5 disposed above and below it, and further on the side thereof. is the second reversing cam 3
4 and the second reversing switch 42 and the first reversing cam 33
and a first reversing switch 41 are arranged above and below the gear train 7. Therefore, space utilization efficiency is high, and both the planar dimensions and height dimensions of the time switch are small. Note that in FIG. 5, arrows indicate the linkage of operations.

(Effects of the Invention) As described above, in the present invention, the two reversing cams 33 and 34 are vertically overlapped with the driving spur gear 12 in the middle, and the reversing switch 41 and 42 is also arranged vertically in an overlapping manner, which has the advantage of reducing the area occupied in plan view, which has the effect of making the time switch smaller.

Moreover, even if the two reversing switches 41 and 42 are polymerized in order to reduce the size as described above, if the reversing switches perform electrical opening/closing operation, the drive interposed between them The spur gear 12 electrically shields both switches, thereby preventing electrical interference between the switches 41 and 42. This has the effect that both switches can be arranged close to each other, thereby making it possible to reduce the vertical dimension of the time switch.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view of the timer showing the case in section (a sectional view taken at the - line position in FIG. 2), and FIG.
Figure 3 is a cross-sectional view taken at the - line position in Figure 2, Figure 4 is a partial cross-sectional view taken at the - line position in Figure 3, and Figure 5 shows the arrangement relationship of each mechanism. Figure 6 is a sectional view taken at the - line position in Figure 1, Figure 7 is a speed regulating mechanism,
FIG. 3 is an exploded perspective view showing the relationship between the tooth train, the first and second reversing cams, and the first and second reversing switches. 4...Main shaft, 22...Main cam, 30...Main switch, 7...Tooth gear train, 33...First reversing cam, 3
4...Second reversing cam, 41...First reversing switch, 42...Second reversing switch, 12...Spur gear.

Claims (1)

[Claims] 1 A clock mechanism for driving the main shaft is linked to the rotatable main shaft, and a main cam is attached to the main shaft, and a main switch is movably opposed to the main cam, while each It has a first reversing cam and a second reversing cam which are freely movable, and a first reversing switch and a second reversing switch are movably opposed to the reversing cams, respectively, and the main shaft and the first and second reversing cams are connected to each other. In the time switch which has a gear train interposed between them to interlock them,
The first reversing cam and the second reversing cam are disposed vertically in parallel on the same axis in an overlapping manner, and a spur gear for driving both reversing cams in the gear train is interposed between them, and The first reversing switch and the second reversing switch are also arranged vertically in an overlapping manner, and the spur gear electrically shields both the reversing switches between the first reversing switch and the second reversing switch. A time switch characterized in that it is configured to intervene in a state in which