JPS6142830B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a time switch.

Conventionally, time switches have been provided in which ON and OFF setters are attached to a scale plate driven by a motor, and these setters operate a cam mechanism to switch the contacts.

However, with this type of time switch, the scale plate rotates and the pointer indicating the current time is fixed, so it is the complete opposite of a regular clock, and has the disadvantages that it is difficult to read the time and difficult to attach the setting switch. There is.

The present invention was made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a time switch whose time can be easily read and set.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing embodiments thereof.

In Figures 1 to 3, 1 is a dial, 2 is a main gear, 8 is a planetary gear, 9 is a display gear, 11
1 is a motor, 14 and 16 are cams, 18 is a cam driving gear, 19 and 21 are contact pieces, 24 is a time switch body, and 27 is a setter.

The dial 1 and main gear 2 are integrally connected via a cylindrical portion 3, and are rotatably mounted on a main shaft 25 which is provided upright on a time switch body 24. A knob 4 and a pointer 5 are integrally provided on the upper surface of the dial 1, and a fan-shaped display window 6 is also provided. Further, on the lower surface of the dial 1, the planetary gear 8 and the display gear 9 are each independently rotatably provided via a support shaft 7. The upper surface of the display gear 9 is divided into four equal parts, and display portions 10 of different colors are provided alternately, and the display portions 10 are visible through the display window 6 of the dial 1.

The main gear 2 is always in mesh with the output gear 12 of the motor 11, and the drive of the motor 11 causes the dial 1 to rotate clockwise in FIG. 1 at a predetermined speed via the main gear 2 and the cylindrical portion 3. It's summery. In addition, output gear 12 and main gear 2
An appropriate speed reduction mechanism may be provided between the two.

The cams 14 and 16 and the cam drive gear 18 are integrally provided and are rotatably provided on the outer periphery of the cylindrical portion 3 that connects the dial 1 and the main gear 2. The cam drive gear 18 and the planetary gear 8 are always in mesh with each other, and the ratio of the number of teeth therebetween is 2:1. Therefore, if the planetary gear 8 rotates 90 degrees, the cam drive gear 18 rotates 45 degrees.
Each of the cams 14 and 16 has four engaging parts 1 on the outer periphery.
5 and 17, which are rotated 45 degrees relative to each other. The ends of contact pieces 19 and 21 are in pressure contact with the engaging portions 15 and 17, respectively, and due to this pressure contact force, the cams 14 and 16 rotate intermittently without free rotation. Each time the cams 14 and 16 rotate by 45 degrees, that is, half a pitch, contacts 20 and 22 provided on both sides of the contact pieces 19 and 21 are turned on and off alternately.

The time from 1 to 24 is graduated on the top surface of the time switch body 24, and an insertion hole 26 is provided around the entire circumference near the inside of the time. The setter 27 is integrally molded from synthetic resin (fourth
(see figure), a columnar portion 28 projecting downward can be fitted into the insertion hole 26. Further, a leg piece 29 having a toothed portion 29a is provided at the lower part of the setter 27, and this toothed portion 29a can mesh with the planetary gear 8 and the display gear 9.

Here, the operation of the time switch having the above configuration will be explained.

First, the dial 1 is turned to set the pointer 5 to the current time, and the setter 27 is inserted into the insertion hole 26 corresponding to the operating time. It is assumed that the contacts 20 and 22 of the contact pieces 19 and 21 are in the ON state in the initial state.

Here, the main power is turned on to supply power to the electric equipment (not shown) connected to the motor 11 and the contacts 19 and 21, and the dial 1 is rotated clockwise in FIG. 1, that is, clockwise. And planetary gear 8
revolves around the cam drive gear 18 while rotating clockwise in FIG.

When the pointer 5 reaches the operating time when the setter 27 is inserted, the planetary gear 8 and the display gear 9 mesh with the teeth 29a of the setter 27, and both the planetary gear 8 and the display gear 9 move to the left in FIG. Rotates 90 degrees in the opposite direction. As a result, the cam drive gear 18 meshed with the planetary gear 8 rotates 45 degrees clockwise in FIG.
6 also rotates 45 degrees, or half a pitch. Accordingly, the contact pieces 19 and 21 follow the engaging portions 15 and 17 of the cams 114 and 16 and are displaced in the direction of separation from each other,
Contacts 20 and 22 turn OFF, and contact piece 1
Power supply to electrical equipment connected to 9 and 21 is stopped. In addition, the display section 10 on the top surface of the display gear 9 is exactly 1
The frame will rotate, and the display section 10 of a different color will appear on the display window 6, allowing you to confirm that it has operated.

FIG. 5 shows another embodiment of the present invention, in which three contact pieces 3 are arranged around the cams 14, 16 similar to the above embodiment.
Four contact mechanisms consisting of 1, 33, and 35 are provided, and the 4-pole contacts can be switched at the same time. That is, the center contact piece 31 is in pressure contact with one of the cams 14, and the contact pieces 33 and 35 on both sides are in pressure contact with the other cam 16 via a spacer 37.
The common contact 32 is switched to the fixed contact 34 or 36 every time the cams 14, 16 rotate by 45 degrees, ie, half a pitch. In conventional time switches, the cam is installed in the corner of the time switch body, so if you try to install a multi-pole contact mechanism, the contact piece and cam must be overlapped in the thickness direction, which takes up a large space. However, in the present invention, cam 1
4 and 16 are located in the center of the time switch body 24, many contact mechanisms are connected to the cams 14 and 16.
You can share the cam by placing it around the
Can be stored compactly.

As is clear from the above description, according to the present invention, the dial with the hands rotates clockwise like a general watch, making it easy to read the current time and set the time. Since the setter indicating the time switch is attached to the time switch body, the setter can be easily installed and there is no possibility of incorrect installation of the setter.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a time switch showing an embodiment of the present invention, Fig. 2 is a partially sectional front view, Fig. 3 is a partially cutaway perspective view, Fig. 4 is a perspective view of a setter, and Fig. 5 is a perspective view of a setter. The figure is a partially sectional plan view of another embodiment. 1...Dial, 5...Pointer, 6...Display window,
8... Planet gear, 9... Display gear, 10... Display section, 11... Motor, 14, 16... Cam, 18
...Cam drive gear, 19, 21, 31, 33,
35...Touch piece, 24...Time switch body, 2
6... Insertion hole, 27... Set piece, 29a... Teeth part.

Claims (1)

[Claims] 1. A dial having a pointer on the top surface and driven clockwise, a cam rotatably provided on the same axis as the dial, and a cam coaxially with the dial so as to rotate integrally with the cam. a cam driving gear provided on the dial, a contact piece that engages with the cam and switches the contact point by rotation of the cam, and a contact piece that is rotatable below the pointer of the dial and meshes with the cam driving gear. a display gear that is coaxial with the planetary gear and has a display portion corresponding to the display window provided on the dial on its upper surface, and that is rotatable independently of the planetary gear; , a time switch main body having a time scale on the top surface and an insertion hole corresponding to the time provided near the time, and a toothed portion at one end capable of meshing with the planetary gear and the display gear, and the above-mentioned insertion A time switch consisting of a setter that is inserted into the hole as appropriate. 2. The time switch according to claim 1, wherein the cam is provided with a plurality of engaging portions, and contact pieces that respectively engage with these engaging portions are arranged around the cam.