JPS6215980B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-operation type time switch that opens and closes a switch at a plurality of set times, and particularly to a time switch with an improved switching pawl mounting structure.

Generally, as a multi-acting type time switch, the first
As shown in the figure, a plurality of switching pawls 4 are attached to a scale plate 3 that is rotated at a constant speed by a synchronous motor 1 via a transmission wheel train 2 and rotates once a day. The passive teeth 5 of the cam 5 are driven by the drive teeth 40 provided.
A configuration is known in which the cam 5 is rotated intermittently by alternately operating the switches A and 5B to open and close the switch 6.

Conventionally, as a switching claw of this type of time switch and its mounting structure, those shown in FIGS. 1 and 2 have been proposed. That is, in the case where a large number of locking parts 30 each having a rectangular cross-sectional shape and consisting of grooves 31 and holes 32 are radially provided on the outer periphery of the scale plate 3 that rotates once a day, and the minimum switching setting time is set to 15 minutes, for example. is provided with 96 locking portions 30, and the switching claw 4 has counter legs 4 corresponding to the grooves 31 and holes 32 of the scale plate 3.
1 and 42 and driving teeth 40, the opposite legs 41 and 42 of the switching claw 4 are inserted into the groove 31 and the hole 32 of the scale plate 3, respectively, and the opposing legs 4 of the switching claw 4 are inserted into the locking part 30.
There is a device in which the switching pawl 4 is attached to the scale plate 3 by landing on the dials 1 and 42.

In the conventional mounting structure of this type, as shown in FIGS. 1 and 2, a first switching pawl 4A having a driving tooth 40 that meshes only with the passive tooth 5A of the cam 5, and a passive tooth 5B of the cam 5. The second having drive teeth 40 that mesh only with
Two types of switching claws 4B are used, and for example, the minimum switching setting time can be set on the scale plate 3 that rotates once a day.
In the case of 15 minutes, 48 pairs of switching claws 4A and 4B are prepared. Depending on how many times the switch 6 is to be opened and closed, a switching claw 4 attached to the scale plate 3 is used.
Since the logarithms of A and 4B are different, it is necessary to store and store the remaining switching claws 4A and 4B that are not operated. A special compartment was provided to store the nails. However, in this type of device, when the switch is to be opened and closed once, 47 pairs of switching claws 4A, 4
B must be stored in the storage section, and a large space is required for storage. In addition, in order to store the switching claw that does not operate in a separate storage area outside the scale plate 3,
Attaching and removing the switching claws and handling for storage are complicated, and the switching claws 4A and 4B are easy to lose.Furthermore, it is necessary to count the switching claws 4A and 4B on both the scale plate 3 and the storage section one by one to make sure that all of them are included. There is a drawback that it is difficult to determine if the switching claws 4A, 4B are missing.

This invention was made in order to eliminate the above-mentioned drawbacks, and by improving the switching claw mounting structure, it is possible to reduce the size by eliminating the need to provide a special storage section for storing the switching claw that is not in operation. To provide a time switch which is capable of achieving the same function and has almost no fear of losing a switching claw.

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 3a, b, c, and d show the main parts of a switching pawl mounting structure according to an embodiment of the present invention, and FIGS. 3a and 3b show two mounting states of the first switching pawl 4A. , FIGS. 3c and 3d show two mounting states of the second switching claw 4B, respectively.

The scale plate 3 shown in FIGS. 3a, b, c, and d has an engaging portion 30 with a rectangular cross section and two sides formed by a groove 31 and a hole 32 provided on the outer periphery. .
Further, the switching claws 4A and 4B are formed in a substantially U-shape from elastic synthetic resin or metal plates, and
The counter legs 41 and 42 are configured to be removably attached to the upper and lower surfaces of the locking portion 30 of the scale plate 3 from the outside, and a linking edge connects one side of the counter legs 41 and 42. 43, drive teeth 40 are provided so as to protrude outward.

The driving teeth 40 of the first switching pawl 4A mesh with the passive teeth 5A of the cam 5 when the scale plate 3 is attached to the locking portion 30 shown in FIG. In the mounted state shown in FIG. 3B, which is upside down, the cam 5 is provided at a position where it does not mesh with either of the passive teeth 5A, 5B. The driving teeth 40 of the second switching pawl 4B mesh with the passive teeth 5B of the cam 5 in the mounted state shown in FIG.
In the mounted state shown in FIG. 3D, in which B is upside down, it is provided at a position where it does not mesh with either of the passive teeth 5A, 5B of the cam 5.

Note that the configuration and operation other than those described above are the same as those in the first
Since it is substantially the same as the conventional time switch shown in the figure and described above, the explanation will be omitted.

Next, to explain the use of the switching claw of this time switch, select either the switching claw 4A or 4B to the locking part 30 at the position where you want the switch 6 to operate, depending on the type of switch operation desired. and third
Install it in the operating state shown in Figure a or c, and attach it to the locking part 30 in the position where you do not want the remaining switches 6 to operate.
The remaining switching claws 4A and 4B are placed in the inoperative state as shown in FIG. 3b or 3d.

As explained above, according to the present invention, since the switching claws 4A, 4B are configured to be attached to the locking portion 30 of the scale plate 3 in either the operating state or the non-operating state, the scale plate 3 Unnecessary locking part 3
0, the remaining switching claw 4A, which does not operate as it is,
4B, and therefore there is no need to separately provide a special storage section for the remaining switching claws that requires a large space as in conventional ones, and the locking section 30 is compact. Since the same number of changeover pawls can be attached to the scale plate 3, it is difficult to lose the changeover pawls, and even if a changeover pawl is lost, it will be clearly known that it has been lost, and it will be difficult to arrange for replacement in time. This has the effect of providing a time switch that can be used without any hassle.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing an example of a conventional time switch, Fig. 2 is a partial sectional view showing the main parts of a conventional switching pawl mounting structure, and Figs. The main parts of the switching pawl mounting structure according to the embodiment are shown, and FIGS. 3a and 3b show the first switching pawl in operation and non-operation, and FIGS. 3c and d show the second switching pawl in operation and non-operation. FIG. 3 is a partial cross-sectional view of the scale plate in each state; 3... Scale plate, 30... Locking part, 31... Groove,
32...hole, 4,4A,4B...switching claw, 40...
... Drive tooth, 41, 42 ... Leg, 43 ... Connection side,
5...Cam, 5A, 5B...Passive teeth, 6...Switch. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 A device that is removably attached to the outer periphery of a scale plate that rotates at a constant speed, and is provided with a plurality of setting claws each having drive teeth that rotate a cam according to the rotation of the scale plate, in which the setting claws are moved up and down. 1. A time switch characterized in that the time switch is formed in a substantially U-shape so that the mounting can be changed in reverse, and the driving tooth is provided at a position where the driven teeth of the cam are engaged or disengaged by changing the mounting.