JPH0158813B2 - - Google Patents

Description

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

[Background technology]

Conventional time switches have a motor and cam mounted on the main plate, and a dial above it.
Therefore, there is a problem that the time switch is thick or deep. As described above, since the thickness is increased, when the device is embedded, the space for installing the time switch becomes larger, and the main device also becomes larger. In addition, in the case of panel installation, even if the protrusion from the panel surface can be reduced,
The protrusion to the back becomes large and may get in the way of other equipment. Furthermore, if the thickness is large, mounting on a printed board becomes difficult in practice. Furthermore, since the conventional time switch requires a setter to be attached and detached to set the time, there is a problem in that the setting operation is troublesome.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a time switch that can be made thinner, smaller, and more compact, and furthermore, can be easily set and checked.

[Disclosure of the invention]

In the time switch of the present invention, a disc-shaped dial having a plurality of setters provided all around the outer periphery is rotatably attached to the front side of a main body plate at an axial center, and the main body plate is opposite to the dial. A ring-shaped protrusion with a groove on the back side is provided on the surface of the motor, and the motor coil is housed in the groove. Further, each setter is swingably supported by the dial in a seesaw manner, and is held at two stable positions by partially riding over the click protrusion of the spring member.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 10. In FIGS. 1 to 4, reference numeral 1 designates a rectangular main body plate, a disc-shaped dial 2 is arranged at the center of its surface, and a transparent front cover 3 covers it. 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. On the outer periphery of the upper surface of the main body plate 1, there is a dial 2.
An outer circumferential wall 1a having a cylindrical inner circumferential surface with a diameter that allows a loose fit is provided. 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. The dial 2 has a large number of setting holes 11 radially arranged on the upper surface of its outer circumference, and a setting element 12 is swingably provided in each of the setting holes 11. The setter 12 is held in two stable positions, upper and lower, by a spring block 13 provided on the dial 2. The setter 12 is the setting hole 11
It is filled with resin and molded. The spring block 13 consists of a ring-shaped portion 13a that is fitted onto the dial 2, and a large number of click protrusions 13b that protrude toward the center for each setter 12 from the ring-shaped portion 13a. 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 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 wheel 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. The circuit 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. 7th
As shown in the figure, the on-lever 39 is attached to the main body plate 1 with the support shaft 3.
It is attached so that it can rotate freely around 9'. By swinging the setter 12 and engaging the protrusion 12a of the setter 12 with the on lever 39, the on lever 3
9 presses a movable contact piece 42 biased by a normally open contact spring 41 with its tip, and a 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.

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. By swinging the setter 12 provided in each setting hole 11 of the dial 2, it is possible to select between the on state and the off state, and when the set time comes, the setter 12 in the on setting state is turned off. Slope 39a of on-lever 39 (Fig. 7)
, and rotates the on-lever 39 to turn on the contacts 43 and 44 (FIG. 4).
When the setter 12 in the off state comes, the on lever 39
does not engage. Therefore, the contacts 43 and 44 are turned off by the bias of the normally open contact spring 41.

In the case of manual operation, the manual operation piece 48 is moved in the direction of the arrow Q in FIG. 7, and the slope 39a of the on-lever 39 is pushed to turn the on-lever 39 on. To turn it off, return the manual operation piece 49 to its original position. At this time, the restoring force of the contact spring 41 can return it to the OFF state.

Although the operation is performed in this manner, the above-mentioned configuration has the following advantages. The motor coil 5 is arranged using the space inside the dial 2, and the transmission mechanism 8, the circuit block 9, and the switch contact mechanism section 10 are arranged below it side by side in a plane, so that it can be made thinner. Moreover, since the space is used effectively, it can be made smaller and more compact.
Furthermore, since the motor coil 5 is housed in a ring-shaped groove 4' formed on the back surface of the main body plate 1, and the transmission mechanism 8, circuit block 9, and switch contact mechanism part 10 are provided on the back surface of the main body plate 1, assembly is easy. It's easy. In particular, since the motor coil 5 is held down by the printed circuit board 31, assembly is even easier. Since the minute hand 17 is decelerated by the hour hand 18 using a harmonic deceleration method, the number of gears can be reduced, and this also allows for a thinner design. Since the setting element 12 is a seesaw type that is already installed on the dial 2, the time can be set with one touch.
Setting operations are easy. Further, since the setting element 12 is already installed on the dial 2 and is formed into a block integrated with the dial 2, there is no need to store or maintain the setting element 12, unlike a removable type. Because of the spring block 13 provided on the outer periphery of the dial 2, there is a click feeling during on/off operation, and the time setting can be confirmed by touch. Since the setter 12 is of a seesaw type that swings, it is possible to display on/off by coloring the location of the displacement difference between the on and off states. For example, the surface of the spring block 13 is made red, and the setter 1
By making the dial 2 and the dial 2 white, the red part can be seen or hidden to provide an on/off display. Since the dial 2 and the setter 12 are molded products, they are lightweight. Since the crystal oscillator 33 is unitized, high reliability can be obtained.
It comes with a clock display, so you can make live settings.
In addition, it has the advantage of power outage compensation with a secondary battery 37, and high accuracy due to quartz.

FIGS. 11A and 11B show other embodiments. In this example, a V-groove 50 is provided on the lower surface of the outer peripheral edge of the dial 2, and an engaging protrusion 13c that fits into the V-groove 50 is provided at the base of the click protrusion 13b of the spring block 13. With this configuration, expansion of the spring block 13 caused by force being applied to the spring block 13 in the outer circumferential direction when the setter 12 is operated is prevented. The rest is the same as the first embodiment.

FIGS. 12A and 12B show still another embodiment. In this example, the spring block 13' is made of metal, and the ring-shaped portion 13a' of the spring block 13' is fitted into an annular groove 51 provided on the lower surface of the dial 2. 13b' is a click protrusion provided in a comb shape from the ring-shaped portion 13a';13c' is the ring-shaped portion 13;
This is a cut-and-raised piece provided in a part of a to prevent it from coming off. With this configuration, since the spring block 13' is made of metal, it is reliable against repeated stress and creep. The rest is the same as the first embodiment.

〔Effect of the invention〕

The time switch of the present invention makes effective use of the space inside the dial and can be made thinner, and moreover, each part fits well and can be formed into a small and compact size, and it is easy to assemble. Furthermore, since the setting element is of a seesaw type, the time can be set with one touch, making the setting operation easy. Moreover, since the setter is stabilized in the two positions by a part of it overcoming the click protrusion of the spring member, there is a click feeling during the on/off operation, and the time setting can be confirmed by touch. Also, unlike a removable setting element, there is no need to store or maintain the setting element.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the - line, FIG. 3 is an exploded perspective view of the same, FIG. 4 is an exploded perspective view of the embodiment shown upside down, and FIG. Figure 5 is a simplified plan view of the inside, Figure 6 is a 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 clutch wheel, FIG. 10 is a cross-sectional view of the setting element attached to the outer periphery of the dial, and FIG. 11A and B are partial cross-sections of the spring block. Figures and partial perspective views, 12th
Figure A is a partial sectional view of another embodiment in the on setting state;
FIG. 12B is a partial sectional view of the off setting state. 1...Main board, 2...Dial, 3...Front cover,
4...Ring-shaped protrusion, 4'...Ring-shaped groove, 5...Motor coil, 6...Back case, 7...Rotor, 8...Transmission mechanism, 9...Circuit block, 10...Switch contact mechanism section, 11...Setting hole , 12...Setter, 13...Spring block, 14...Dial, 17...Minute hand, 18...Hour hand, 19...Iron core, 23...Minute wheel, 24...Date wheel, 25...Gear portion, 27...Clutch wheel, 31... Printed circuit board, 32... Gear support cover, 33... Crystal oscillator, 39... On lever, 41... Contact spring, 4
3...Movable contact, 44...Fixed contact, 48...Manual operation piece.

Claims (1)

[Claims] 1. A disc-shaped dial in which a plurality of setting elements are provided all around the outer periphery is attached to the surface of the main body plate so as to be rotatable at the axial center, and each of the setting elements is swingable around the dial in a seesaw manner. The dial is supported by a ring-shaped protrusion that has a slightly smaller diameter than the dial and has a ring-shaped groove on the back side, and is held in two stable positions by being supported and partially riding over the click protrusion of the spring member. a transmission mechanism protruding from the surface of the main body plate located within a diameter of the ring-shaped groove, housing a motor coil in the ring-shaped groove, and transmitting rotation from a rotor driven by the motor coil to the dial; A time switch in which a motor coil driving circuit and a switch contact mechanism section opened and closed by the setter are arranged parallel to each other in a plane on the back surface of the main body plate.