JPS58172835A - Multiple stage switching timer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a multi-stage switching timer.

In the past, various timers have been proposed that can switch the set time range into two or more steps, but it is possible to change the setting time range by changing the internal wiring, replacing the scale plate, or replacing the key that fits in the key box. However, there were drawbacks such as complicated switching work and loss of replacement parts.

The object of the present invention is to be able to change all the numbers on the display board and at the same time change the connections of the built-in electric circuits by simply moving the timer on its axis from the front of the timer.
Moreover, it is an object of the present invention to provide a multi-stage switching timer that can easily have 5 to 6 switching stages even in the case of a small-sized timer.

The multi-stage switching timer of the present invention includes a rotating body that is rotated by external operation in front of the set time switching circuit and the variable resistor main body, and a sliding brush and a rotary cam for switching the switching circuit. A plurality of range indicators are provided integrally with the rotating body, displaying a plurality of range indicators along a predetermined circumference on the front surface of the rotating body, and reading the rotation angle of the operating knob of the variable resistor in front of the rotating body. The present invention is characterized in that a fixed scale plate is provided with a scale and a display chamber through which one of the range indicators can be seen.

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

FIG. 1 shows an exploded perspective view of the internal structure of a product implementing the present invention, excluding the housing.

A switching circuit turn 2, which will be described later, is formed on the printed circuit board 1, and a variable resistor 6 is fixed to the center thereof, and its shaft 4 extends forward.

A rotating body 5 is rotatably disposed in front of the substrate 1. This rotating body 5 has, for example, five types of magnification indicators (X 1 , "" 8.XIO, X80°X10
0), axial grooves 8 are carved on the side surface 7 at central angles equal to the switching angle of the magnification display, and projections 9 pressed by elastic force are engaged with the grooves 8. is fixed within the housing.

A sliding brush 10 that contacts the printed circuit pattern 2 at a predetermined central angle is fixed to the back surface of the rotating body 5. Further, a cam 11 is fixed to the central portion of the front surface of the rotating body 5, and rotates together with the rotating body 5. A gear 12 is provided at the rear side of the rotating body 5.
There is a small gear 16 that meshes with it, and a VC that rotates and hangs from the front of the panel. Therefore, the rotation of the small gear 16 causes the magnification display body 6, sliding brush 10, and cam 11 to rotate, and each time they rotate by a predetermined angle, they fall into the protrusion 9 or the groove 8.

A movable scale plate 14 is provided in front of the rotating body 5. This movable scale plate 14 moves in the upward r direction when viewed from the front, and has an elongated hole 15 in the vertical direction in the center, and a bent portion 16 at the upper end of the hole 14, which is entirely composed of a cam follower that engages with the cam 11. A linear spring 17 presses the movable scale plate 14t against the upper surface of the cam at all times. On the front are numbers (1, 2, 3) that are displayed from the see-through window when the scale plate 14 is displaced upward,
The numbers that display when displaced downward (,2,,4゜,
6. ．． 8.1) are shown superimposed.

A fixed scale plate 18 is provided on the bO side of the movable scale plate 14. This scale plate 18 includes a central hole 19 through which the shaft 4 of the rotary resistor passes, a window 20 for seeing through the magnification display 6, and a window 21 for seeing through all the numbers on the movable scale plate 14. . . 21, and a window 22 for rotationally driving the small gear 16, and an arc-shaped scale 26 is provided.

FIG. 2 shows an example of the circuit pattern of the printed circuit board 10.

As shown in FIG. 3, the shape of the sliding brush 10 that comes into contact with this is such that a total of four contacts are provided at a central angle of 100° and contact the inner and outer rings of the pattern, respectively.

FIG. 4 shows a circuit configuration diagram of the timer of the present invention in use. The signal generating circuit 25 is an integrated circuit including a pulse generating circuit and a counter, and the period of the pulse changes continuously by adjusting the variable resistor 6.
, 2, 4) t- The setting time range is changed by selecting.

Next, the operation of the above embodiment will be explained.

By inserting the dry bracket through the window 22 and rotating the small gear 16, the rotating body 5 rotates, and the sliding brush 10 and cam 11 also rotate accordingly. 1. For example, if you want to set a 10-minute song with the maximum scale of the entire set time range, mark "
Rotate the pinion until lQJMIN appears. Ding ff
When rl 0J MIN appears, the projection 9 falls into the groove 8 and the rotation torque suddenly changes, so the rotation is stopped here. At this time, as shown in FIG. 6, on the display screen, time display numbers appear in the window 21A only on the 10th division scale side, and no numbers appear in the window 21B of the 3rd division scale. In this state, the sliding brush 10 is at the position indicated by the two-dot chain line in FIG. The variable resistor 6 can be rotated and adjusted completely independently of these switching states, and the set time of the timer is determined from the point where the indication of a knob (not shown) and the scale 26 of the fixed scale plate 18 match. Can be read directly.

For example, if you want to set the maximum scale to 8 minutes, rotate the small gear until "3" appears on the window 21B and "1x1" M, IN appears on the transparent window 20. At this time, as shown in FIG. 6, on the display screen, numbers appear only in the window 21B on the 8-equal scale side, and no numbers appear on the window 21A on the 10-equal scale side.

The means for externally rotating the rotating body of the present invention may be, for example, by slightly exposing a part of the rotating body on the side surface of the housing and rotating the rotating body directly with a fingertip. Further, a friction wheel, a belt, etc. may be used in place of the gear. Furthermore, in order to prevent unnecessary switching, the rotating part of the rotating body may be provided on the back of the housing or the like.

- Furthermore, the switching circuit of the present invention is not limited to the circuit pattern of the embodiment, and may be a simple switching circuit, for example.

According to the present invention, a mechanical mechanism such as display switching and a circuit switching means are integrated and work in conjunction with each other, so that a multi-stage switching timer with 5 to 6 stages or more can be realized despite its small size. can be made with a simple configuration.

Further, according to the method of obtaining the code signal using a switching circuit as shown in the embodiment, there is an effect that the number of terminals of the integrated circuit can be reduced as much as possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the internal structure of an embodiment of the present invention. FIG. 2 is a diagram showing an example of the circuit pattern of the printed circuit board 1, and FIG. 8 is a diagram showing the sliding brush 10. FIG. 4 is a circuit configuration diagram of the embodiment of the present invention in use. FIGS. 5 and 6 are diagrams showing an example of the front appearance of the second embodiment. 1...Printed circuit board, 2...Circuit l<turn,
6... Variable resistor, 4... Shaft of variable resistor,
5... Rotating body, 6... Range display body,
10...Sliding brush, 12...Gear, 16.
・・Small gear, 18・・Fixed scale plate, 20・
...See-through window, 22...Operation window, 26...Scale,
Patent applicant: Shisen Electric Co., Ltd. Agent: Patent attorney NishiEEI Figure 5 Figure 6

Claims (1)

[Claims] (1) In front of the setting time switching circuit and the variable resistor main body,
A rotating body that rotates by external operation, a sliding brush for switching the switching circuit, and a rotary cam are all provided integrally with the rotating body, and a plurality of pieces are provided along a predetermined circumference on the front surface of the rotating body. A fixed scale plate is provided in front of the rotating body, which is provided with a scale for reading the rotation angle of the operating knob of the variable resistor, and a display window that allows one of the range indicators to be completely seen through. A multi-stage switching timer characterized by: (2) A circuit pattern and a variable resistor main body are provided on a printed circuit board, and the axis of the variable resistor extends through the rotating body and the fixed scale plate to the front surface of the fixed scale plate, and The multi-stage switching timer according to claim 1, wherein a sliding brush for circuit switching is provided on the back surface. (8) A multi-stage switching timer according to claim 1, wherein a gear is attached to the rotating body, and a shaft of a small gear that meshes with the gear is rotated from the front side of the timer.