JPS6142272Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a timer with a changeover switch used in electrical equipment that requires switching between multiple load circuits, such as switching the rotation speed of an electric fan or switching the intensity of an electric heating appliance. It is.

Prior Art Conventionally, timers have been used in various electrical products, but most of these are equipped with only a main switch for conducting or cutting off the power circuit, and are used to select between various different loads. There is no built-in mechanism. In particular, when it comes to electric fans, wind fans, electric fans, etc., by switching the rotation speed of the motor, it is possible to select and use high, medium, and low, for example, but this switching operation cannot be performed with a timer alone. For example, a piano touch select switch or a rotary select switch was provided separately from the timer. Therefore, it is not only inconvenient to use, but also relatively expensive and undesirable in terms of design.

Problems to be solved by this invention This invention was made in view of the above-mentioned problems, and includes a timer with a main switch that is integrated with a changeover switch that can switch between multiple load circuits.
Moreover, the present invention provides a timer with a change-over switch in which the change-over switch can be arbitrarily operated separately from the timer.

Means for Solving the Problems This invention will be explained below based on the drawings.

According to Figures 1 and 2, 1 is the main axis (set axis)
A timer knob 2 is fixed to one end, and a main gear 4 is slidably attached to the middle by a landing plate 3, and linked to the main gear 4 by the repulsive force of a mainspring 5. A speed governor (not shown) allows the main shaft 1 to move in a fixed direction.
6 is a cam of a known quick-acting cam device provided at the other end of the main shaft 1, and 7 is a main switch which is turned on and off by the cam 6. Although not shown,
It is assumed that the speed governor is provided with a stop device so that it is driven when the main switch 7 is turned on by the cam 6 to cause the main shaft 1 to move, and is stopped when the main switch 7 is turned off. Furthermore, as shown in FIG. 2, when the timer knob 2 is set in the direction shown (arrow a), that is, when the timer is set, it can be rotated to a full set, and as soon as the timer knob 2 is released, the timer is When the timer knob is driven in the opposite direction to the set direction, and when the timer knob is rotated in the direction shown (arrow b) in the illustration (arrow b) according to the timer off position to the position indicated as "ON" in Figure 2, the timer knob stops at this position, i.e. A stopper mechanism 8 is provided so that the timer is stopped while the main switch remains on, a so-called continuous on state.

9 is the case of the timer, 10 is the cover, 11 is the plate of the controlled device, and 12 is the plate 1.
Points as shown in Figure 2 with the nameplate fixed at 1,
"ON""OFF" and time scale are displayed.

Reference numeral 13 denotes a switching knob fixed to the upper part of a switching cam body 14 (Fig. 4), which will be described later. Since it is a transparent body, each display on the name plate 12 can be visually seen through the switching knob 13.

3 and 4, 14 is a switching cam body inserted loosely between the main shaft 1 and the case 9;
A high stage part 15, a middle stage part 16 and a low stage part 17 are formed approximately symmetrically (Fig. 3), and a star-shaped cam part 1 is formed at the bottom.
8 is formed. Reference numerals 19 and 20 are movable contact pieces having a V-shaped projection in the middle, and the projections are slidably engaged with and disengaged from the step portions 15, 16, and 17 of the switching cam body 14. Reference numerals 21, 22, and 23 are fixed contact pieces, respectively, and of these, 21 and 22 are the movable contact pieces 19 and 2.
3 also connects and separates from the movable contact piece 20 to turn on and off the circuit. Also, each of these contact pieces 19, 2
0, 21, 22, and 23 are respectively press-fitted and fixed in narrow grooves 24 formed in the case 9 of the timer, as shown in FIG.

Reference numeral 25 denotes a leaf spring having a U-shaped protrusion 26 in the middle, both ends of which are fixed to the case 9, and as shown in FIG. By press-contacting the protruding portions 26 of 25, the rotation angle of the switching cam body 14 is regulated and positioned.

Figure 6 is the general wiring diagram, E is the power supply, L1, +
L2 and L3 are loads, respectively.

Effect Explaining the effect in this kind of configuration, the second
As shown in the figure, when the timer knob 2 is set in the direction of the arrow a for the desired time according to the time scale displayed on the cup 12, the main switch 7 is turned on, the mainspring 5 is wound, and the timer starts running. . At this time, the desired load is selected and energized by setting the switching knob 13 to one of ",", and "." When the desired time has elapsed, the main switch 7 is turned off, the load is automatically stopped, and the timer is also stopped.

Next, when you want to operate the load continuously, set the timer knob 2 to the "ON" display on the nameplate 12, and the timer will be in the continuous on state, and the main switch 7
is turned on, the selected load will operate continuously.

The switching knob 13 can be rotated in either direction of arrows a and b, and when it is set to "," the movable contact piece 19 (FIG. 3) engages with the high step part 15 of the switching cam body 14. The movable contact piece 19 and the fixed contact piece 21
is turned on, and the movable contact piece 20 engages with the low step portion 17 and is turned off. Next, when it is set to ``'', the movable contact piece 19 engages with the middle step part 16 and turns off, the movable contact piece 20 engages with the high step part 15, contacts the fixed contact piece 23 and turns on, and then When the movable contact piece 20 is engaged with the middle part 16 and turned off, the movable contact piece 1
9 engages with the low step portion 17, contacts the fixed contact piece 22, and turns on, so that the circuit is sequentially switched. Note that the number of step portions and movable and fixed contact pieces of the switching cam body 14 is not limited to this.

Furthermore, although a spring-type timer has been described in the above structure, a small motor-type timer may also be used.

Embodiment An embodiment will be described in which the present invention is used in an electric fan with the above-described configuration.

FIG. 7 shows the switching knob 13 for the electric fan, and it is assumed that switching to "strong,""medium," and "low" will result in strong rotation, medium rotation, and weak rotation, respectively. In the embodiment, the wires are wired so that in FIG. 6, the wire corresponding to L1 is the motor winding for strong rotation, L3 is the winding for medium rotation, and L2 is the winding for weak rotation.

As a result, if you want to operate the electric fan continuously, all you have to do is set the timer knob 2 to the "ON" display on the nameplate 12 and turn the main switch 7 on continuously.If you want to operate the fan continuously, you can turn the timer knob 2 to the arrow a. If the timer is turned in the direction to set the desired time, the timer will automatically turn off after the set time has elapsed.

Then, while the electric fan is in operation, the switching knob 13
When it is set to "strong", the movable contact piece 19 and the fixed contact piece 21 are turned on and the fan rotates strongly, and when it is set to "medium", the movable contact piece 20 and the fixed contact piece 2 are turned on.
3 is turned on, the fan rotates at medium speed, and then turns to "weak"
When this happens, the movable contact piece 19 and the fixed contact piece 22 are turned on, and the electric fan rotates weakly.

Effects of the invention As described above, the invention has developed a timer in which a knob is fixed to the main shaft of a timer that uses a spring or a small motor as a drive source and is rotated at a constant rate by a clock mechanism, and is equipped with a fast-acting cam device that turns on and off the main switch. In this case, a switching cam body adjacent to the lower part of the timer knob, rotated by the switching knob, and having a star-shaped cam part formed at the lower part and a plurality of steps formed on the outer periphery is connected to the main shaft and the case. In addition, the switching cam body has a plurality of fixed contact pieces and a plurality of movable contact pieces that move toward and away from each other, and the lower star-shaped cam portion is configured to press a leaf spring into contact with the switching cam body. So,
You can easily select and switch between multiple circuits by operating the switching knob separately from the timer.
It is not necessary to separately provide a select switch or the like in addition to a timer as in the past, and it is excellent in operability and economical efficiency, and has extremely practical effects such as being able to solve the problem of space for mounting equipment.

[Brief explanation of the drawing]

The drawings show the present invention: Fig. 1 is a partially sectional front view, Fig. 2 is a plan view, and Fig. 3 is Fig. 1A.
-A sectional view, FIG. 4 is an exploded perspective view, FIG. 5 is a sectional view taken along line B-B in FIG. 1, and FIG. 6 is an overall wiring diagram. This figure shows a plan view of the design. 1: Main shaft, 2: Timer knob, 6: Cam,
7: Main switch, 9: Case, 13: Switching knob, 14: Switching cam body, 15, 16, 17: Step part, 18: Star-shaped cam part, 19, 20: Movable contact piece,
21, 22, 23: Fixed contact piece, 25: Leaf spring.

Claims (1)

[Scope of utility model registration request] In a timer in which a knob is fixed to the main shaft of a timer that uses a spring or a small motor as a drive source and rotates at a constant rate by a clock mechanism, and is equipped with a quick-acting cam device that turns on and off the main switch, the timer is adjacent to the bottom of the timer knob. A switching cam body to which a switching knob is fixed, a star-shaped cam portion formed at the lower part, and a plurality of steps formed on the outer periphery is loosely inserted between the main shaft and the case, and the switching A plurality of fixed contact pieces and a plurality of movable contact pieces that move toward and away from each other are connected to the body, and a leaf spring is pressed into contact with the lower star-shaped cam portion. A timer with a changeover switch, characterized in that a desired load circuit is selected from a plurality of circuits constituted by the movable contact piece and the fixed contact piece.