JPH0416759B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a time switch to be built into a distribution board or the like.

[Conventional technology]

This type of conventional time switch is assembled as a whole, and for this reason, the time switch 9' is housed in an iron box 13 together with the main circuit breaker 21, the branch circuit breaker 4, the electromagnetic switch 22, etc. When it was assembled into the interior, it was installed as shown in FIGS. 6 and 7, and wired as shown in FIG. 8. 11 in FIG. 7 is the inner door.

[Problem to be solved by the invention]

In this time switch 9', the positional relationship between the time display section, operation section, and input/output terminals is constant, so the mounting position and mounting direction of the time switch 9' are limited, making wiring complicated and unnecessary space. If the time switch is installed sideways due to wiring reasons, the display becomes difficult to read and operation becomes difficult. However, there is a risk of damage to the equipment due to erroneous operation, and to avoid this, it is necessary to prepare multiple types of time switches with different orientations of the display section and operation section. The present invention has been made in view of these points, and its purpose is to allow the terminals to be mounted in a direction that suits the convenience of the wiring, and to provide display means and the like regardless of the mounting direction. To provide a time switch which is easy to use by allowing operating means etc. to be oriented in the correct direction and free from the risk of erroneous operation.

[Means to solve the problem]

Therefore, the present invention has a time switch main body which is provided with a terminal portion and a fixing means on the side and a substantially circular opening on the front side, and a time switch body which is provided with a time display means and all operation means for setting the time on the front side. The time switch body has a built-in power supply circuit and a relay drive circuit, as well as a circumferential guide groove coaxial with the opening of the time switch body. The display unit has a mounting part with a circular cross section that can be fitted freely and a protrusion that engages with the guide groove to guide the rotation.The display unit has a built-in printed circuit board with a microcomputer mounted on it and is connected to the time switch body. It is characterized by electrical connection between the two using lead wires. [Function] According to the present invention, no matter which direction the time switch body is installed due to the orientation of the terminals, the time display means and all operation means can be adjusted by changing the orientation of the display unit with respect to the time switch body. can be placed in the correct direction. [Embodiment] The present invention will be described in detail below based on the illustrated embodiment. What is shown in FIG. 1 is an electronic time switch 9 for collective wiring for a lighting distribution board, which is formed separately. The time switch body 3 is configured to include a time switch body 3 and a display unit 35. The time switch body 3 has a narrow rear end, an output terminal 7 having a terminal screw is provided on one side of the rear end, and an input terminal 8 having a terminal screw is provided on the other side of the rear end. A cylindrical recess 36 with a circular opening is formed on the front surface, and an engaged portion 39 serving as a guide groove 46 along the circumferential direction is formed on the inner peripheral surface of the recess 36. and a rotation stopper 47 are provided. The display unit 35 is formed into a substantially cylindrical shape, and is provided with a digital display device 1 as a time display means on the front surface, and a time input operation section 2 consisting of a set switch 17 and the like as an operation means. Further, as is clear from FIG. 2, the rear end side of the outer circumferential surface of the housing 40 of the display unit 35 formed of synthetic resin has flexibility and the tip thereof is connected to the engaged portion 39. An elastic engagement piece 38 is provided with a protrusion 41 for locking. Further, the display unit 35 is electrically connected to the time switch body 3 by twistable lead wires 43 and 44 which are led out from within the recess 36 of the time switch body 3 and drawn into the interior from the back side. When the rear side of the display unit 35, which has a circular cross section, is inserted into the recess 36 through the front opening of the time switch body 3, the protrusion 41 of the elastic engagement piece 38 fits into the guide groove 46 (engaged portion 39). The display unit 35 is fixed in the recess 36 so as not to come off, and the display unit 35 is fixed to the time switch body 3 by sliding the protrusion 41 of the elastic engagement piece 38 along the guide groove 46. The display unit 35 can be set in the direction in which the display is most easily viewed and the display unit 35 is most easily operated by rotating the display unit 35 continuously. The rotation stopper 47 makes the rotation range of the display unit 35 within one rotation by coming into contact with the protrusion 41, and the lead wire 4
3. Prevents wire breakage due to excessive twisting of 44. This time switch 9 has a circuit configuration as shown in FIG. 3, and the time switch main body 3 is equipped with the above-mentioned input/output terminals 8 and 7 on the outside, and also has a power supply circuit section 18 and a relay drive circuit inside. It has a built-in section 20. The display unit 35 has a display device 1 and a time input operation section 2 on the front, and also has a built-in printed circuit board 45 on which a microcomputer 19 is mounted, and the time switch main body 3 and the display unit 35 are Display unit 35
Two power supply lead wires 43 for driving the
and one lead wire 44 for transmitting an on signal or an off signal to the relay drive circuit section 20. Time switch body 3
A commercial AC power supply I is connected to the input terminal 8 of the . The power supply circuit section 18 applies a necessary DC voltage to each section such as the microcomputer 19, the display device 1, and the relay drive circuit section 20.
Correction of the current time and setting of the timer time at which an on signal or an off signal is desired are performed by operating the time input operation section 2 arranged on the front of the display unit 35. The microcomputer 19 has a clock input clock, and the microcomputer 19 counts this clock input clock to mark the current time, and the display device 1 displays the current time and timer time based on a signal from the microcomputer 19.
Further, the microcomputer 19 counts the clock input and compares the current time with the timer time to generate an on signal or an off signal, and this signal from the microcomputer 19 is sent to the relay drive circuit section 20. , drives a relay (not shown) and switches the output terminal 7 to control the load. Note that the three output terminals 7 are formed by a common terminal C, a normally open terminal NO, and a normally closed terminal NC. FIG. 4 shows a state in which the time switch 9 is installed in a power distribution board together with a collective circuit breaker 4 for a lighting distribution board. The circuit breaker 4 has an operating handle 14 exposed on the front side, claw holes (not shown) provided at a constant pitch on both sides of the narrow rear end side, and one side of the rear end side. Output terminals (not shown; the same shape and position as those of the time switch) are provided at a constant pitch on the side, and input terminals (not shown; the same shape and position as the time switch) are provided on the other side of the rear end. (same position) are provided at a constant pitch. The external shape, dimensions, etc. of this collective type circuit breaker 4 for distribution boards meet certain standards (Japan Electrical Manufacturers Association regulations)
JEM, Classification: Regulation 12, Page 2-1), and the time switch body 3 of the time switch 9 mentioned above also has the same shape as the circuit breaker 4 in accordance with this standard.
are formed to have the same dimensions. Reference numeral 10 denotes a panel such as a power distribution board or switchboard, which has a door 16 attached to an iron box 13 with an open front. Inside the iron box 13, there is provided a spring-like claw 5 for fixing the circuit breaker 4. . The time switch 9 can be installed in the iron box 13 of the panel 10 by any mounting means, but the same pawl hole as the circuit breaker 4 is provided and the pawl 5 is inserted in the same way as the circuit breaker 4.
It is recommended that it be fitted into the In this case, nail 5
This allows a plurality of circuit breakers 4 to be installed in the iron box 13 and, at the same time, the time switch 9 to be installed adjacent to the circuit breakers 4, so that the structure can be made compact. A large main circuit breaker 21 and an electromagnetic switch 22 are installed inside the iron box 13, but these, the circuit breaker 4, and the time switch 9 are connected to conductive busbars 23, wiring wires 24, etc. connected by the eighth
The connections are made in the same manner as shown in the figure, and the electromagnetic switch 22 can be turned on and off at a predetermined time by a time switch 9. Figure 5 shows the inner door 11 that covers the equipment on the front of the iron box 13.
This shows the state in which it is installed. The inner door 11 here has openings 25 and 2 for operating the circuit breakers 4 and 21, the time switch 9, and the electromagnetic switch 22.
6, 12, and 27 are perforated. The direction of the input terminal 8 and output terminal 7 of the time switch 9 is set on a case-by-case basis to make it easy to use and compact according to the convenience of use at the site.
can be set to face in the correct direction by rotating it relative to the time switch body 3, so the display device 1 and the operating means are not affected by the orientation of the time switch body 3 and can be set normally. can be directed.

【Effect of the invention】

As described above, in the present invention, the display unit equipped with the time display means and all operation means for time setting on the front side has a mounting portion that is rotatably fitted into the approximately circular opening of the time switch body. Therefore, even if the direction of the time switch body is determined so that the terminal faces in the required direction due to wiring reasons, rotating the display unit will change the time display means and time setting in the display unit. It is possible to maintain the vertical direction of all operating means in a normal state, and this not only prevents the user from misreading the time displayed on the time display means, but also prevents all operations for setting the time. It is possible to easily and reliably set the time by operating the means, and there is no need to prepare multiple types of displays with different orientations, and it is equipped with a microcomputer. The printed circuit board is located on the display unit side, and the large power supply circuit and relay drive circuit are located on the time switch body side, making it possible to reduce the size and weight of the display unit, as well as making it easier to rotate the display unit. The number of lead wires connecting the display unit and the time switch body can be reduced, and the time switch body is provided with a circumferential guide groove that is concentric with the opening of the time switch body. Since it is provided with a protrusion that engages with the guide groove and guides the rotation, the display unit can be rotated smoothly in addition to the small number of lead wires.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a partial sectional view of the display unit shown above, Fig. 3 is a block circuit diagram of the same shown above, and Fig. 4 shows the display unit installed in the same board. Fig. 5 is a perspective view showing the inner door fixed to the same board as above, Fig. 6 is a perspective view of the board in which the conventional example is installed, and Fig. 7 is a perspective view showing the inner door fixed to the same board as above. FIG. 8 is a perspective view of the panel, and FIG. 8 is a circuit diagram showing the wiring inside the same panel, in which 1 is a display device, 2 is a time input operation section, 3 is a time switch body, and 35
indicates the display unit.

Claims (1)

[Claims] 1. A time switch body that has a terminal section and mounting/fixing means on the side and a substantially circular opening on the front, and a display unit that has a time display means and all operating means for setting the time on the front. The time switch body has a built-in power supply circuit and a relay drive circuit, and also has a circumferential guide groove coaxial with the opening, and has a cross section that is rotatably fitted into the opening of the time switch body. The display unit, which has a circular mounting part and a protrusion that engages with the guide groove to guide rotation, has a built-in printed circuit board with a microcomputer installed, and is connected to the time switch body by a lead wire. A time switch characterized by being electrically connected.