JPH0136650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a repeatable time switch.

[Background technology]

Conventionally, there are typical repeatable time switches shown in FIGS. 21 and 22. In other words, the dial body 71 rotates at a constant speed at a constant period.
The switch 73 is operated by a plurality of setters 72 attached to the outer periphery of the switch 73 to turn on/off the electrical equipment at a predetermined time. This is done by inserting and fixing the setter 72 into a plurality of setter holes 74 arranged in a row on the peripheral edge of the dial body 71.
The end of the switch 73 is configured to switch the switch 73. The setter holes 74 are provided, for example, at intervals of 15 minutes. The switch 73 is opened and closed each time each setter 72 operates the switch lever 73a with which it engages.

In this conventional device, the setter 72 is prepared separately from the dial body 71, and the setter 72 must be inserted and fixed into the setter hole 74 corresponding to the time when the switch 73 needs to be changed, so there is no need to change the switch. The setter 72 had to be removed from the setter hole 74. As a result, changing the mounting position of the setting element 72 in response to a change in the switch switching time is relatively complicated and easy to make mistakes, and the setting element 72 that is not in use is easily lost. In addition, an unused setter 72 is added to the time switch main body 75.
It was necessary to provide a storage section.

Furthermore, in conventional devices, there are those that use a single-shaped setter for both on-off operations, and those that use a setter that has a dedicated shape for on-off operations. In the former case, there is a disadvantage that it is difficult to distinguish between on and off operations at each time when switching a complex program, and in the latter case, the structure is complex and it is not easy to replace the program. It was hot. Furthermore, since the parts themselves are small and in large quantity (96 pieces per machine at 15 minute intervals), managing the parts is difficult.

[Purpose of the invention]

The object of the present invention is to provide a time switch in which the setting element operation is easy to understand, erroneous operation is less likely to occur, there is no problem of losing the setting element, the setting element can be easily operated, and the switch operation can be performed reliably. do.

[Disclosure of the invention]

This invention provides a time switch in which a setter provided on the outer periphery of a dial that rotates at a constant speed is engaged with a lever, and the lever opens and closes switch contacts. A setter that slides is provided, and when pushed toward the center, the setter engages with the lever, and when engaged, the setter is deflected by the pressing force applied from the lever and engaged with each other. An on-lock elastic piece and an on-lock engaged portion are provided to hold the setter in the pushed-in position.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 18. In FIGS. 1 to 4, reference numeral 1 designates a rectangular main body plate, with a disc-shaped dial 2 disposed at the center of its surface and covered with a transparent front cover 3. A ring-shaped protrusion 4 having a slightly smaller diameter than the dial 2 is protruded from the upper surface of the main body plate 1 and concentrically with the dial 2. A ring-shaped motor is inserted into a ring-shaped groove 4' formed inside the ring-shaped protrusion 4. A coil 5 is housed therein. An outer wall 1 having a cylindrical inner circumferential surface with a diameter that allows the disc-shaped dial 2 to fit loosely is provided on the outer circumference of the upper surface of the main body plate 1.
A is provided protrudingly. A back case 6 is attached to the back side of the main body plate 1, and therein is a transmission mechanism 8 that transmits rotation from a rotor 7 driven by a motor coil 5 to the dial 2, and a circuit block for driving the motor coil 5. 9 and a switch contact mechanism section 10 are arranged and housed in a two-dimensional manner. A large number of setting elements 50 are attached to the outer periphery of the dial 2. A dial plate 14 having a smaller diameter than the dial 2 is disposed on the inner peripheral surface of the dial 2, and is fixed to a cylindrical shaft 16 that protrudes from the main body plate 1 and passes through the dial 2. 17 is a minute hand, and 18 is an hour hand.

The motor and transmission mechanism will be explained. The motor coil 5 is wound around the iron core 19.
Both ends are shaped to apply magnetomotive force to the rotor 7, which is a permanent magnet. The rotor 7 has a pinion portion, and its rotation is transmitted to the minute wheel 23 via a plurality of gears 20 to 22. From the minute wheel 23 to the minute wheel 24,
The rotation is transmitted to the gear portion 25 of the dial 2, and the dial 2 is driven. As shown in FIGS. 8 and 9, the minute wheel 23 has a pinion portion 23a integral with the minute hand shaft 26.
and a large gear 23b, and a one-way clutch is formed by an internal gear 23c provided on the large gear 23b and a clutch wheel 27 integrated with the pinion portion 23a. A minute hand 17 is attached to the minute hand shaft 26, and rotation is transmitted from the minute hand shaft 26 to the hour hand 18 at a reduced speed by harmonic drive. That is, the hour hand 1 is moved by the eccentric cam 28 (FIG. 8) provided on the minute hand 17.
8 is given driving force, and the fixed gear 2 of the dial 14
9 and an internal gear 30 provided on the hour hand 18, the rotational speed is regulated. 32 is a gear support cover.

The motor drive circuit block 9 has various circuit components such as a crystal oscillator 33, a resistor 34, a capacitor 35, a rectifier 36, and a secondary battery 37 mounted on a printed circuit board 31, and is supplied with power from an external terminal 38 to drive the motor. It generates drive pulses. The crystal oscillator 33 is a cylindrical tube in which a crystal oscillator, an IC, a resistor, a trimmer, etc. are mounted and sealed.

The switch contact mechanism section 10 will be explained. 1st
As shown in FIGS. 0 and 11, an on-lever 39 is attached to the main body plate 1 so as to be rotatable about a support shaft 39'. The on lever 39 is a normally open contact spring 4
1 presses the movable contact piece 42 with its tip,
The movable contact 43 at the tip is brought into contact with the fixed contact 44. Fixed contact 44 is attached to terminal 45. The movable contact piece 42 is connected to a terminal 46. 48 is a manual operation piece, which is attached so as to be movable along the guide hole 49.

The dial 2 and the setting element 50 will be explained.
The dial 2 has a large number of radial guide grooves 51 and 52 formed at a constant pitch in the circumferential direction on the upper and lower surfaces of the outer circumference. When the set interval is 15 minutes, 96 guide grooves 51 and 52 are provided each. The guide groove 51 on the top surface has click recesses 5 at two locations on the bottom surface.
3 and 54, and the guide groove 52 on the lower surface has an on-lock engaged recess 55 on the bottom surface at the rear end. As shown in FIGS. 15 and 16, the setter 50 is formed in a U-shape, and a protrusion 56 that fits into the guide groove 51 on the upper surface of the dial 2 is provided on the lower surface of the upper piece. The protrusion 56 has both click recesses 53 and 5.
One click protrusion 57 that removably engages with 4.
is provided. The lower piece of the setter 50 is slidably fitted into the guide groove 52 on the lower surface of the dial 2, and the lower piece becomes thinner midway in the longitudinal direction to form an on-lock elastic piece 58. The on-lock elastic piece 58 has a locking pawl 59 on the upper surface of its tip that engages with the on-lock engaged recess 55, and a lever engaging protrusion 60 that engages with the on-lock lever 39 on the lower surface of its tip. Lever engaging protrusion 60
The radially inner surface of the dial 2 is a tapered surface 60a, and the tapered surface 60a engages with the on lever 39.

Operation As shown in FIG.
When pushed toward the center until it engages with
When 7 is pulled out until it is engaged, it becomes an OFF state. 1st
In FIG. 2, T ₁ indicates an interval in which the setter 50 is in an OFF state, and T ₂ indicates an interval in which the setter 50 is in an ON state.

The setter 50 in the on state engages with the slope 39a of the on lever 39 as the dial 2 rotates,
The on lever 39 is rotated to bring the movable contact 42 into contact with the fixed contact 44. The setter 50 contacts the on-lever 39 at the tapered surface 60a at the tip of the on-lock elastic piece 58. Therefore, the on-lock elastic piece 5
8 is pushed by the on lever 39 and deflects upward, and engages with the on lock engaged recess 55 of the dial 2. Therefore, the setting element 50 is prevented from moving toward the outer circumferential side of the dial 2, and is prevented from returning to the OFF state inadvertently. In other words, it is locked on.

To do this manually, move the manual operation piece 48 in the direction of arrow Q in FIG.
Push the slope of 9 and use the on lever 39 to close contact 4.
Turn on 2,44.

Although it operates in this way, since the setting element 50 is permanently installed on the outer periphery of the dial 2, there is no risk of losing it, and it is easy to set and change the on/off setting. Therefore, erroneous operations are less likely to occur. Further, as shown in FIG. 12, the on/off state can be determined at a glance by whether or not the setter 50 is pushed in. Further, as described above, since the lock projection 58 and the lock concave portion 53 are engaged with each other upon contact with the ON lever 39, the switch is locked, so even if the setter 50 is made to slide lightly, it will not be stable. Switch operation can be obtained. The slide direction of the setter 50 may be inclined with respect to the radial direction of the dial 2, but if it is set in the radial direction as in this embodiment, no unreasonable force is applied to the dial 2.

FIGS. 19 and 20 show other embodiments.
In this example, a lever engaging protrusion 6 is provided on the setter 50'.
An on-lock locking pawl 59' is provided on the distal end side of the dial 2, and an on-lock engaged piece 61 is provided on the dial 2. 61' is the on-lock engaged piece 61
It is a hole for forming. In this case, the on-lock elastic piece 58' is connected to the on-lock lever 39.
When it comes into contact with, it bends downward and engages with the on-lock engaged piece 61. Further, a retaining recess 62 is formed in the guide groove 51 on the upper surface of the dial 2, and a retaining piece 63 is formed in the setter 50'. Therefore, due to their mutual engagement, the setter 5
0' is prevented from being pulled out further than the off position and falling off. The rest is the same as the first embodiment.

〔Effect of the invention〕

The time switch of this invention has easy-to-understand operation of the setter, prevents erroneous operation, eliminates the problem of losing the setter, and allows easy operation of the setter.
Moreover, there is an effect that the switch operation can be performed reliably.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line 2, FIG. 3 is an exploded perspective view of the same, FIG. 4 is an exploded perspective view of the embodiment shown upside down, and Figure 5 is a simplified plan view of the inside, Figure 6 is a cross-sectional view taken along the line - in Figure 5, Figure 7 is a bottom view with the back case removed, and Figure 8 is a partially enlarged cross-section. 9 is an exploded perspective view showing the relationship between the minute wheel and the clutch wheel, FIG. 10 is a perspective view showing the on lever, FIG. 11 is a partially enlarged bottom view with the back case removed, and FIG. Fig. 12 is a plan view of the dial with the setting element attached, Fig. 13 is a partial perspective view of the dial, Fig. 14 is a perspective view of the dial looking up from above, and Fig. 15 is the setting element. FIG. 16 is a perspective view showing the setter at a different angle, FIG. 17 is a sectional view taken along the line -- in FIG. 19
20 is a perspective view of a setter thereof, FIG. 21 is a plan view of a conventional time switch, and FIG. 22 is a cross-sectional side view thereof. 1...Body board, 2...Dial, 3...Front cover, 5...Motor coil, 6...Back case, 7
... Rotor, 8 ... Transmission mechanism, 9 ... Circuit block, 10 ... Switch contact mechanism section, 14 ... Dial plate, 17 ... Minute hand, 18 ... Hour hand, 19 ... Iron core, 23 ... Minute hand Car, 27...Clutch car, 31
...Printed circuit board, 32...Gear support cover, 3
3...Crystal oscillator, 39...On lever, 41...
...Contact spring, 43...Movable contact, 44...Fixed contact, 48...Manual operation piece, 50, 50'...
...Setter, 51, 52...Guide groove, 53, 54
...Click recess, 55...On-lock engaged recess, 56...Protrusion, 57...Click protrusion, 5
8, 58'...Elastic piece, 59, 59'...On-lock locking pawl, 60, 60'...Lever engaging protrusion, 6
0a...Tapered surface.

Claims (1)

[Claims] 1. A disc-shaped dial, a mechanism for rotating the dial at a constant speed, a plurality of guide grooves provided on the periphery of the dial extending inwardly and outwardly at a constant pitch, each formed in a U-shape, a plurality of setting elements fitted to an edge of the dial so as to be movable along a guide groove; and a plurality of setting elements provided corresponding to the dial, which move as the dial rotates when the setting elements are pushed in. A lever rotated by
A switch contact that opens and closes by the rotation of this lever, an on-lock engaged part provided on the back side of the dial corresponding to each setting element mounting position, and an on-lock engaged part provided on the setting element and caused by contact with the lever. A time switch comprising an on-lock elastic piece that bends in the thickness direction of the dial and engages the on-lock engaged portion to hold the setter in the depressed position.