JPH0222970B2 - - Google Patents

Description

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

[Background technology]

Conventionally, there is a time switch in which a setter is provided on a disc-shaped dial that rotates at a constant period, and the setter turns on and off a micro switch via a switch lever. This type of time switch rotates the dial in one direction to set the current time, but due to the structure of the engaging part between the switch lever and the setting element, it cannot be rotated in the opposite direction. There were flaws. If the setter engaging portion of the switch lever is provided with inclined surfaces on both sides in the direction of dial rotation, the setter will not be strongly caught and the dial can be turned in the forward and reverse directions. However, if the front surface in the direction of rotation is an inclined surface, the switch contact will be disconnected slowly, causing problems such as seizure of the contact.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a time switch with a simple structure, which allows the time to be set by turning the dial in forward and reverse directions, and which also enables rapid contact closure.

[Disclosure of the invention]

The time switch of the present invention is a time switch in which a setting element is provided on a dial that rotates at a constant cycle, and the setting element opens and closes a switch contact via a switch lever. Both surfaces are sloped, and the transmission mechanism that transmits rotation from the drive source to the dial is provided with play forming means that allows the dial to rotate slightly in the forward direction. The play forming means includes a gear disposed concentrically with the dial, an arcuate hole provided on one side of the dial, and a protrusion provided on the other side that fits loosely into the arcuate hole. By making both surfaces sloped in this manner, the time can be set by turning the dial forward or backward. Furthermore, since play is provided in the rotation transmission mechanism, the dial temporarily rotates quickly when the setter passes the switch engagement protrusion of the switch lever, resulting in quick disconnection of the switch contact.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 12. In Figures 1 to 5, 1 is a rectangular main body plate, and a disc-shaped dial 2 is located at the center of the back side.
is arranged and covered with a transparent front lever 3. An arc-shaped protrusion 4 having a slightly smaller diameter than the dial 2 is provided on the upper surface of the main body plate 1 and protrudes concentrically with the dial 2. A motor coil 5 is housed.
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 back case 6 is attached to the back side of the main body plate 1, and includes a rotor 7 driven by a motor coil 5, a transmission mechanism 8 that transmits rotation from the rotor 7 to the dial 2, and a motor coil 5. A driving circuit block 9 and a switch contact mechanism section 10 are arranged and housed in a two-dimensional manner.

Dial 2 has multiple setter mounting holes 1 on the outer periphery.
1 radially, and a swingable setter 12 is attached to the setter attachment hole 11 over the entire circumference. 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 projects 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 made of permanent magnets. The rotor 7 has a pinion portion, and the minute hand wheel 2 is connected to the minute hand wheel 2 through a plurality of gears 20 to 22.
The rotation is transmitted to 3. Minute wheel 23 to sun wheel 2
4, the rotation is transmitted to the gear portion 25 of the dial 2, and the dial 2 is driven. The minute wheel 23 is the seventh
As shown in the figure, a pinion portion 23a integrated with the minute hand shaft 26
and a large gear 23b. 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 23b, but the minute wheel 23 can also rotate in the opposite direction.
A minute hand 17 is attached to the minute hand shaft 26.
6 to the hour hand 18, the rotation is transmitted at a reduced speed by harmonic drive. That is, the eccentric cam 28 provided on the minute hand 17 applies driving force to the hour hand 18, and the fixed gear 29 of the dial 14 and the hour hand 18
The rotational speed is regulated by meshing with an internal gear 30 provided in the rotor.

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 dial 2 is manufactured separately from the gear part 25 as shown in FIG. The shaped hole 52 is filled with the hole 52. Therefore, the dial 2 has play with respect to the gear portion 25 within the range of the arc-shaped hole 52. The arcuate hole 52 and the protrusion 51 constitute play forming means. The arc center of the arc-shaped hole 52 is the same as the rotation center of the dial 2.

The switch contact mechanism section 10 will be explained. Fifth
As shown in the figure, the on-lever 39 is attached to the main body plate 1 with the support shaft 3.
It is rotatably attached at 9'. The on-lever 39 is pressed outward by a torsion coil spring 55' attached to the support shaft 39'.
The on lever 39 pushes the push pin 59 of the micro switch 10' via the moving pin 55.
The push pin 59 presses the movable contact piece 42 biased by the contact spring 41 with its tip, and presses the movable contact piece 42 at the tip.
4 is separated by a fixed contact 43, and a movable contact 45 is brought into contact with a fixed contact 46. The movable contact piece 42 is connected to a terminal 49. On lever 3
9 is provided with a switch engaging protrusion 60 for contacting the setter 12, and both sides of the protrusion in the dial rotation direction are formed into slopes 60a and 60b. Also,
Manual lever 4 for manual operation
8 is attached so as to be movable along the guide hole 58 and the guide pin 57. Manual lever 4
A movable pin 55 is attached to 8 via a connecting rod 61, and the movable pin 55 is movable along a guide wall 62. Both ends of the connecting rod 61 are hinged.

Operation 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. When the setter attached to the dial 2 is turned on and the set time comes, the setter 12 turns on the slope 60b of the ON lever 39.
(Fig. 12A), rotate the on-lever 39, and move the contact 4 through the moving pin 55.
3 and 44 are turned off, and contacts 45 and 46 are turned on. 9 to 11 show the relationship between the on-lever 39 and the protrusion 51 of the gear 25 fitted with the dial 2. When the setter 12 is in contact with the slope 60b and the parallel portion 60c of the on-lever 39, a force opposite to the rotating direction is applied to the dial 2 by the on-lever 39, so that the protrusion 51 of the gear portion 25 is in contact with the dial 2. It comes to the rotation direction side of the circular arc hole 52. Next, the setter 12 is on the slope 60a of the on lever.
When the dial 2 comes to this side, the on-lever 39 applies a rotational force to the dial 2, so the dial 2 momentarily moves in the forward direction until the protrusion 51 comes to the opposite side of the rotation direction of the arcuate hole 52 of the dial 2. Rotate.
Therefore, the contacts 45 and 46 (FIG. 5) open quickly. That is, when the dial 2 and the gear 25 are fixed, the setter engaging protrusion 60 of the on lever 39
The face of the setter passing side is sloped 60a like this.
In this case, the setter 12 rotates the contacts 45 and 4 while passing through the slope 60b at the normal rotational speed of the dial 2.
6 will be cut off, resulting in a delay. However, since the dial 2 and the gear part 25 are separated and the rotation is transmitted through the play between the circular hole 52 and the protrusion 51, the dial 2 is allowed to freely rotate in the forward direction, and the slope 60a 4 as in the vertical plane
A quick cut of 5.46 is obtained.

Next, the case of manual operation will be explained. To turn it off, move the manual lever 48 to the OFF side as shown in FIG. Therefore, the contacts 43 and 44 are in an on state, and the contacts 45 and 46 are in an off state. Conversely, when the manual lever is moved to the ON side, the moving pin 55
remains sandwiched between the on lever 39 and the push pin 59, and the tip 48' of the manual lever 48 pushes the tip 39'' of the on lever 39. Therefore, the contacts 43 and 44 are in the OFF state and the contacts 45 and 46 are in the ON state. Note that although FIG. 12C shows the case where the switch is in the AUTO and ON state, the same applies when the switch is in the AUTO and OFF state.

The time on the time switch is set by rotating the minute hand 17 by hand.
Since a and 60b are on both sides, both forward and reverse rotation are possible. Therefore, it is easy to set the time and is convenient to use. Note that the structure of the clutch 27 is such that forward rotation (clockwise) is light and reverse rotation is heavy.

In addition, in the above embodiment, the gear portion 2 of the dial 2
Although play is provided between the protrusion 51 of No. 5 and the arcuate hole 52 of the dial 2, play may be provided at any location of the transmission mechanism 8 to allow forward rotation of the dial 2.

〔Effect of the invention〕

The time switch of the present invention is a combination of a structure in which both the front and rear surfaces of the setter engaging protrusion of the switch lever are formed into slopes, and a structure in which the transmission mechanism is provided with a play forming means. ,
While it is possible to set the time by turning the dial forward or backward, the contacts can be quickly disconnected. Further, the play forming means is constituted by a gear disposed concentrically with the dial, an arcuate hole provided on one side of the dial, and a protrusion provided on the other side that fits loosely into the arcuate hole, so that it is possible to The effect is that it is possible to obtain a lot of play with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is an exploded perspective view thereof.
Figure 4 is an exploded perspective view of the same upside down, Figure 5 is a plan view of its interior, Figure 6 is a sectional view of its rotation transmission mechanism, and Figure 7 is an exploded view of its minute wheel. FIG. 8 is an exploded perspective view of the rotation transmission part of the dial, and FIGS. 9 to 11 are operational explanatory diagrams showing the relationship between the switch lever, dial, and setting element.
FIG. 2A is an explanatory diagram of the operation of the switch contact mechanism in the auto-on state, FIG. 12B is an explanatory diagram of the operation in the off-state, and FIG. 12C is an explanatory diagram of the operation in the on-state. 1...Body plate, 2...Dial, 3...Front cover, 4...Circular protrusion, 4'...Circular groove, 5
... Motor coil, 6 ... Back case, 7 ... Rotor, 8 ... Transmission mechanism, 9 ... Circuit block, 10
...Switch contact mechanism section, 12...Setter, 17
...Minute hand, 18...Hour hand, 25...Gear section, 24
...hole, 39...on lever (switch lever),
42...Movable contact piece, 43...Fixed contact, 45...
...Movable contact, 46...Fixed contact, 48...Manual lever, 51...Protrusion, 52...Circular hole,
53... Cylindrical shaft, 55... Moving pin, 55'...
Spring, 58... Guide hole, 59... Push pin, 60
...Setter engaging protrusion, 60a, 60b...Slope.

Claims (1)

[Claims] 1. A rotatably supported disc-shaped dial,
A setting element attached to the dial and protruding from the back surface, a switch lever located on the back side of the dial so as to be rotatable in and out of the dial, and a switch lever provided on the switch lever to rotate the dial. a setter engaging protrusion whose front and rear surfaces with respect to the direction are formed with slopes, with which the setter slides and engages as the dial rotates; and a switch contact that is opened and closed by rotation of the switch lever;
A gear disposed concentrically with the rotation center of the dial on the back side of the dial, a rotational drive source for rotating the gear, an arc-shaped hole provided in one of the dial and the gear, and a circular hole provided in the other. A time switch comprising play forming means consisting of a protrusion that loosely fits into an arcuate hole.