JPH0161213B2 - - Google Patents

Description

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

[Background technology]

Traditionally, repeatable time switches have a 24-hour system (or 12
There are two types of timers: hourly timers and weekly timers that rotate once a week. Although these two models were partially standardized, they had different specifications in terms of assembly and other aspects. Therefore, if the 24-hour timer was later changed to a weekly timer, it would be necessary to disassemble and reassemble it from the beginning, and it was impossible to change to either one after completion. Furthermore, in manufacturing both types of timers, the degree of commonality is low, resulting in low production rates and the need for additional equipment.

[Purpose of the invention]

This invention enables the production of 24-hour or 12-hour models and weekly models, making it possible to standardize most parts, and even after completion, it is possible to change to either format with minimal replacement of parts. The purpose is to provide a time switch that can be used.

[Disclosure of the invention]

The time switch of the present invention is 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 a switch contact. A second dial to be attached in place of this is prepared, and the first dial is driven by directly meshing with the dial drive shaft originally protruding from the case, and the second dial is installed separately on the main body case. Rotation is transmitted from the dial drive mechanism via a transmission mechanism.

Therefore, in addition to preparing two types of dials, by simply changing the transmission mechanism, everything else can be the same for the 24-hour type and the weekly type.

In the second invention, the transmission mechanism is comprised of a transmission gear rotatably attached to a transmission gear mounting shaft originally protruding from the case, and the second dial is provided with an internal gear that meshes with the transmission gear. . The transmission gear has a drive gear part and a transmission gear part.

In this case, except for the dial, the system can be changed to a 24-hour system or a weekly system by simply replacing one transmission gear, and the direction of rotation of the dial can be kept constant.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 13. Figures 1 to 11 show the case of a 24-hour configuration. In Figures 1 to 4, 1
is a rectangular body plate, with a disk-shaped first dial 2 or second dial 2' at the center of its surface.
(FIGS. 3 and 13) are arranged and covered with a transparent front cover 3. The first dial 2 has a 24-hour display on its surface, and has a gear portion 25 (FIG. 8) in the center of its back surface. The second dial 2' has a weekly display on its surface,
It has an internal gear 25' on the back surface. On the top surface of the main body plate 1, there is a ring-shaped protrusion 4 with a slightly smaller diameter than the dial 2.
is protruded concentrically with the dial 2, and a ring-shaped protrusion 4
A ring-shaped motor coil 5 is housed in a ring-shaped groove 4' formed inside. An outer circumferential wall 1a having a cylindrical inner circumferential surface with a diameter that allows the dial 2 to fit loosely therein is protruded from the outer circumferential portion of the upper surface of the main body plate 1. A cylindrical shaft 16 is protruded from the center of the upper surface of the main body plate 1, and a transmission gear mounting shaft 50 is protruded apart from the cylindrical shaft 16 to the side thereof. The transmission gear mounting shaft 50 is used when the transmission gear is a weekly type. A back case 6 is attached to the back surface of the main body plate 1, and together with the main body plate 1, a main body case is constituted. Inside the back case 6 are a main transmission mechanism 8 that transmits rotation from a rotor 7 driven by a motor coil 5 to the dial 2, a circuit block 9 for driving the motor coil 5, and a switch contact mechanism section 10, which are arranged on a flat surface. It is placed and stored. The dial 2 has a large number of setter attachment holes 11 radially arranged on the upper surface of its outer circumference, and an ON setter 12 and an OFF setter 13 are removably attached to any of the setter attachment holes 11. A dial plate 14 having a smaller diameter than the dial 2 is arranged on the 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 main transmission mechanism will be explained. The motor coil 5 is wound around the iron core 19.
Both ends of the magnet 9 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. Rotation is transmitted from the minute wheel 23 to the gear portion 25 of the dial 2 via the minute wheel 24, and the dial 2 is driven. The pinion portion of the minute wheel 24 becomes a dial drive gear 24a. As shown in FIGS. 8 and 9, the minute hand wheel 23 has a pinion portion 23a integrated with the minute hand shaft 26 and a large gear 23b, an internal gear 23c provided on the large gear 23b, and a pinion portion 23.
A and a clutch wheel 27 integral with each other form a one-way clutch. 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 eccentric cam 28 (the eighth
), a driving force is applied to the hour hand 18, and the rotational speed is regulated by the engagement between the fixed gear 29 of the dial 14 and the internal gear 30 provided on the hour hand 18. 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 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 FIG. 0 and FIG.
It is rotatably mounted around 9' and 40'.
The on-lever 39 presses a movable contact piece 42 , which is biased by a normally open contact spring 41 , at its tip, and brings a movable contact 43 at the tip into contact with a fixed contact 44 . Fixed contact 44 is attached to terminal 45. The movable contact piece 42 is connected to a terminal 46. The holding lever 40 holds the on-lever 39 in the on-state, and is biased in the direction of arrow R by a torsion coil spring 47. 48 is a manual operation piece, which is attached so as to be movable along the guide hole 49.

Next, the operation of this time switch will be explained. The rotation of the rotor 7 drives the minute wheel 23 via each of the gears 20 to 22, and rotationally drives the dial 2 via the minute wheel 24. The ON setting element 12 and the OFF setting element 13 are attached to the dial 2, and when the set time comes, the ON setting element 12 passes while pressing the slope 39a (FIG. 10) of the ON lever 39, rotating the ON lever 39. Contacts 43, 4
4 (FIG. 11) is turned on. When the on-lever 39 is rotated to the on-state, the holding lever 40 engages the on-lever 39 with the engaging claw 40a and holds it in the on-state. Therefore, the contacts 43 and 44 are maintained in the on state. Next, when the off setter 13 comes, the off setter 13 is placed on the surface 40b of the holding lever 40.
Press to pass. Therefore, the hold on the on lever 39 by the holding lever 40 is released, and the contact 4
3 and 44 are turned off by the bias of the normally open contact spring 41.

To do this manually, move the manual operation piece 48 in the direction of arrow Q in FIG.
Push the slope 39b (Fig. 11) to turn on lever 3.
9 is turned on. To turn it off, return the manual operation piece 49 to its original position. At this time, the claw 49a of the manual operation piece 49 returns while hooking the manual claw 40c of the holding lever 40, so that the holding of the on-lever 39 by the holding lever 40 can be released and the on-lever 39 can be returned to the off position.

When configuring the weekly type, replace the first dial 2 with the second dial 2', and fit the transmission gear 51 to the transmission gear mounting shaft 50 of the main body plate 1 as shown in FIGS. 12 and 13. let The transmission gear 51 has a small-diameter drive gear part 51a and a large-diameter driven gear part 51b, and the driven gear part 51b is similar to the dial drive gear 2.
4a, the drive gear portion 51a meshes with the internal gear 25' of the dial 2'. By using the transmission gear 51, the weekly second dial 2' has a rotation period that is 1/7 that of the first dial 2.

In this way, by simply adding one transmission gear 51 in addition to replacing the dials 2 and 2', it is possible to change from a 24-hour type to a weekly type, and the main body case and the blocks incorporated inside it are completely different. The same thing can be used. Therefore, most of the production can be shared between the 24-hour system and the weekly system, improving production efficiency. Since the transmission gear 51 is attached to the transmission gear mounting shaft 50 provided on the top surface of the main body plate 1, there is no need to disassemble the inside of the main body plate 1 when attaching or removing it, and therefore even after completion it can be easily converted into a 24-hour system. Mutual weekly changes can be made. The rotation of the second dial 2' is transmitted by an internal gear 25', and the first dial 2 is an external gear part 25, so one transmission gear 51 with a 1/7 reduction is used. By simply changing the rotation period, the rotation directions of the dials 2 and 2' can be matched. Therefore, an idle gear or the like is not required, and the configuration is simple.

In the above embodiment, one transmission gear 51 was used and the second dial 2' was provided with the internal gear 25', but the second dial 2' was provided with an external gear and a plurality of gears were used. From the dial drive gear 24a to the second
The rotation may be transmitted to the dial 2'.

〔Effect of the invention〕

Since the time switch of this invention is produced in 24-hour type and weekly type, most of the time switches can be made common, and even after completion, it can be changed to either type with minimal replacement of parts. There is an effect that it can be done.

In the second invention, when changing the format, it is only necessary to attach and detach one transmission gear in addition to the dial,
This has the effect that format changes can be made even more easily.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention configured for 24-hour operation, Fig. 2 is a cross-sectional view taken along the - line, Fig. 3 is an exploded perspective view of the same, and Fig. 4 is an upside-down view of the same. FIG. 5 is a simplified plan view of the inside, and FIG. 6 is an exploded perspective view.
The figure is a sectional view taken along the - line in Fig. 5, Fig. 7 is a bottom view with the back case removed, Fig. 8 is a partially enlarged sectional view, and Fig. 9 shows the relationship between the minute wheel and clutch wheel. 10 is a perspective view showing the relationship between the on lever, holding lever, and setter, FIG. 11 is a partially enlarged bottom view with the back case removed, and FIG. 12 is a weekly configuration. FIG. 13 is a plan view showing the inside of the case, and FIG. 13 is a partially enlarged sectional view thereof. 1... Main body plate, 2... First dial, 2'...
...Second dial, 3...Front cover, 4...Ring-shaped protrusion, 5...Motor coil, 6...Back case, 7...Rotor, 9...Circuit block, 10...
...Switch contact mechanism section, 12...On setting element, 1
3...Off setter, 14...Dial plate, 17...Minute hand, 18...Hour hand, 19...Iron core, 24...Sun wheel, 24a...Dial drive gear, 25...Gear portion, 25 '... Internal gear, 27... Clutch wheel,
31...Printed circuit board, 39...On lever, 4
0...Off lever, 41...Contact spring, 43...
Movable contact, 44... Fixed contact, 48... Manual operation piece, 50... Transmission gear mounting shaft, 51... Transmission gear, 51a... Drive gear, 51b... Driven gear.

Claims (1)

[Scope of Claims] 1. A main body case in which a constant speed rotation mechanism is housed with a protruding dial mounting shaft, and first and second gear parts that are rotatably attached to the dial mounting shaft in an exchangeable manner and have different gear parts. a dial, a dial drive gear that is provided to protrude from the main body case and meshes with the gear portion of the first dial to transmit the rotation of the constant speed rotation mechanism, and when the second dial is attached, the main body case. a mechanism installed in the main body case to transmit the rotation of the dial driving gear to the gear part of the second dial; a setting element attached to the first and second dials respectively; Or a time switch equipped with a mechanism that engages with the setting element of the second dial to open and close the switch contact. 2. A main body case in which a dial mounting shaft and a transmission gear mounting shaft protrude and house a constant speed rotation mechanism, and an externally toothed gear portion and an internally toothed gear portion, which are rotatably attached to the dial mounting shaft in an interchangeable manner. a dial drive gear which is provided to protrude from the main body case and meshes with the gear part of the first dial to transmit rotation of the constant speed rotation mechanism; and a drive gear part and a driven gear part. When the second dial is mounted, the driven gear part is rotatably attached to the transmission gear mounting shaft so that the driven gear part meshes with the dial drive gear and the drive gear part is attached to the second dial. A timer comprising a transmission gear that meshes with a gear portion, a setter that is attached to the first and second dials, and a switch mechanism that is attached to the main body case and engages with the setter to open and close a switch contact. Switch.