JPS6122916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alarm time detection device for a leaf type digital watch.

Generally, the first detection means, which includes first and second detection plates provided corresponding to the hour and minute gears and detecting the phase, is linked to the first signal generated by the first detection means and the protrusion provided on the minute leaf. A leaf-type digital clock that activates an alarm device when the second signal generated by the second detection means matches, the first detection means is arranged on the left side of the hour leaf, and the second detection means is arranged on the right side of the minute leaf. . In such a device, if a switch is provided for each of the two, the number of components such as the switch and the lever for operating the switch increases, which is disadvantageous in terms of economy and space. It is also easily possible to connect the two with a lever or the like and operate a single switch, but since each lever must be biased with a spring, this increases the load torque on the clock train and reduces the drive output. This poses a problem in terms of construction in battery-powered watches that have small motors.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to improve the above-mentioned drawbacks by using simpler means without increasing the load torque of the timepiece wheel train.

According to the present invention, the above-mentioned purpose is to enable the first detection lever to be interlocked with the first and second detection plates corresponding to the hour and minute unit gears and the protrusion of the minute leaf, and to be able to follow the first detection lever. A second detection lever is provided, and the biasing force of the only switch capable of operating the alarm device is achieved by configuring the device to act on both the detection levers and the detection plates.

The embodiments shown in the drawings will be described below.

First, the structure shown in FIGS. 1 and 2 will be explained.

First, let me explain the time display mechanism. Reference numeral 1 is a drive motor that meshes with the minute hand gear 2 and drives it at a speed of one rotation every 60 minutes. The minute wheel 2 is connected to a minute drum 3 via a well-known ratchet mechanism;
The latter is rotated in only one direction. The portion drum 3 is fixed to a central shaft 7, its right end is rotatably supported by a case 5, and has 60 portion leaves. As shown in FIG. 2, these minute leaves include a first minute leaf 6a having no protrusion at all, a second minute leaf 6b having a protrusion 60 only on the left end (not shown in the figure), and a second minute leaf 6b having a protrusion 661 on the right end. It consists of a 3-minute leaf 6c and a 4-minute leaf 6d having a projection 60 on the left end and a projection 61 on the right end, and these equally divided leaves are 00
When indicating minutes and 01 minutes, the first minute leaf 6a is used as the upper leaf, and when indicating 02 minutes, 03 minutes, and 04 minutes, the 3rd minute leaf 6a is used.
The minute leaf 6c is used, the 1st minute leaf 6a is used again at 05 minutes and 06 minutes, and so on until the 44th minute leaf is the 1st minute leaf 6a and the 3rd minute leaf 6c.
are arranged in combinations of two and three.

Then, the second minute leaf 6b is used in the 45th and 46th minutes, the fourth minute leaf 6d is used in the 47th, 48th, and 49th minutes, and the second minute leaf 6b and the fourth minute leaf are used until the 59th minute. 6d are sequentially arranged in combinations of two and three pieces.

A drum 8 is rotatably supported on the central shaft 7 and has 48 leaves 9.

A second minute wheel 10 is fixed in the middle of the central shaft 7, and its boss 10a is connected to a reference minute drum 2, which will be described later.
It is rotatably supported by 0. The second minute wheel 10 has a cam hole 10b and a pinion 10c. The pinion 10c is the Hino rear gear 11.
The clock gear 8a provided on the hour drum 8 is connected to the clock gear 8a through the time drum 8.

A cam hole 8b is formed on the left side surface of the hour hand gear 8a.

Reference numeral 13 designates a leaf holding spring which works in conjunction with the left protrusion 60 of the second and fourth minute leaves to prevent the leaf 9 from turning over even if it comes off the second pawl 14b of the feed spring 14 when pushed up by the protrusion. When pressed, the fourth minute leaf 6d of 59 minutes comes off the first pawl 14a and 00 minutes is displayed, and at the same time, the pressing of the feed spring 13 is released, so that the hour leaf 9
is reversed.

Next, the alarm mechanism will be described. Reference numeral 15 is an alarm time set knob, which is connected to a minute scale drum 20 on which alarm times of 60 minutes are recorded at 5-minute intervals. The corresponding drum 20 is on the one hand case 5
on the other hand by the middle plate 19 fixed by screws 24, and on the other hand the side plate 1 fixed to said middle plate 19.
Rotationally supported by 8. And the upper gear 17
The time guide drum 21 is shifted once per revolution of the minute guide drum 20 through the minute guide drum 20.
It is rotatably supported by a central boss. A click tooth 20a is provided in the middle of the minute guide drum 20, which engages with a click spring 19a protruding from the middle plate 19, and is engaged with the knob 15.
When rotated, clicks are activated at intervals of, for example, 5 minutes. In addition, there is a groove 2 on the right end of the above-mentioned guide drum.
0c, and a rib 20d as shown in FIG. 3 is formed in this groove, and guides the minute detecting plate 25 non-rotatably but movably in the left-right direction with respect to the minute indicator drum.

The minute detection plate 25 is the hole 1 of the second minute wheel mentioned above.
It has a cam 25a that can fall into position 0b. Furthermore, a pinion 20b is provided at the right end of the minute guide drum, and a boss 19c protrudes from the middle plate.
The guide intermediate gear 22 is rotationally guided by the reference intermediate gear 22. The pinion 22a of the reference intermediate gear 22 is rotatable by the shaft 7, and meshes with the gear of the detection plate 26 when guided so as to be movable left and right.

The time detection plate 26 has a cam 26a that can fall into the hole 8b of the time drum described above.

Next, to explain the reference time detection mechanism shown in FIG. It has a first arm 27a and a second arm 27b, and also has a pin 2 which will be described later.
It has 7c. 29 is a second detection lever, which is rotatable around the shaft 30, the first arm 29a is interlocked with the right protrusion of the third minute leaf 6c and the fourth minute leaf 6d, and the other end is connected to the first detection lever. pin 2
It has a groove 29c that engages with 7c. and,
A protrusion 29b is formed in the middle of the first arm, and is made of a conductive material in the form of a thin plate and is associated with the elastic first switch _{SW1 .}
Accordingly, in FIG. 2, the second detection lever 29
The first detection lever 28 is biased counterclockwise via the first detection lever 28, and both detection plates 25 and 26 are biased rightward. Further, the biasing force of the first switch SW ₁ is set to a small value within a range that allows both the detection levers 28, 29 and the detection plates 25, 26 to operate and provides a contact pressure that provides stable electrical continuity. It is something that will be done.

The second switch SW2 is a so-called permanent sound stop switch, which is turned on when the user wants to use buzzer B.
Make it. The switches SW1, SW2 and buzzer B are connected to a power source E in series.

The operation of the device configured in this way will be explained below. When the user wishes to use the alarm device, first turn on the second switch SW2, and turn the knob 15 while looking at the numbers written on the minute indicator drum 20 and hour indicator drum 21 to set the desired alarm. Set the time. At this time, the cams 25a and 26 provided on the minute detection plate 25 and the hour detection plate 26
If a is formed vertically on one side as shown in Figure 4a, it can only be rotated in one direction, but if it is formed with slopes on both sides as shown in Figure 4b. For example, the above-mentioned knob can be rotated in either forward or reverse directions.

Along with this time setting, the phases of the cams (25a and 26a) of the minute detection plate 25 and the hour detection plate 26 are determined. If you leave the watch in this condition,
The motor M has a minute wheel 2, a minute drum 3, and a second minute wheel 1.
0 is rotated, and the hour drum 8 is further rotated via the rear gear 11.

During this process, first, the phases of the hole 8b of the hour drum 8 and the cam 26a of the hour detection plate 26 match, and the hour detection plate 2
6 is connected to the first switch via the first detection lever 27.
It becomes possible to move to the right by the force of SW1, but at this time, the phases of the cam 25a of the minute detection plate and the hole 10b of the second minute wheel do not match yet, so the first detection lever 27 does not rotate. The first switch SW1 is
It does not turn on.

Then, when the time gear rotates further, the phases of the cam 25a of the minute detection plate 25 and the hole 10b of the second minute wheel 10 match, allowing the minute detection plate 25 to move to the right. However, at this time, as shown in Figure 2, the tip of the second detection lever is at the fourth leaf (6c).
Or, it is related to the right protrusion of 6d) and cannot be rotated, so the first switch SW1 is in the OFF state.
Buzzer B still does not work.

Then, the state shown in Figure 2, that is, the 59th leaf is 00
When the second detection lever is reversed, the protrusion that restrains the second detection lever is no longer present, so the first detection lever and the second detection lever are rotated by the force of the first switch SW1, the first switch SW1 is turned ON, and the buzzer B is turned on. Operate. At this time, if you operate the second switch SW2 and turn it off, the buzzer B will stop operating.

However, if you want to leave buzzer B sounding without performing such a sound-stopping operation,
1 to 2 minutes after the sound, the third leaf 6
Since the protrusion c pushes up the second detection lever again, the related first switch SW1 turns OFF and the buzzer B temporarily stops. When further time elapses and 5 minutes is displayed, the protrusion disappears, so the second detection lever rotates to the right again, the first switch SW1 is turned on, and the buzzer B is activated. If the ringing is not stopped in this manner, the buzzer B will operate every five minutes until a certain period of time passes and the cam 25a of the minute detection plate comes out of the hole 10b of the second minute hand gear.

In the embodiment described above, the first detection lever 27 and the second detection lever 27
The detection lever 29 is connected by a pin 27c and a groove 29c, but the pin 27 of the first detection lever 27
c may be configured so that it follows the back of the second detection lever 29, or in the above embodiment, the first switch
Although SW1 is linked to the second detection lever 29, the same effect can be obtained even if it is linked to the first detection lever 27.

[Brief explanation of the drawing]

FIG. 1 is a main sectional view of the present invention, and FIGS. 2, 3, and 4 are partial views of FIG. 1. 6a-6d...minute leaf, 8...hour drum, 1
0...Second minute wheel, 25...Minute detection plate, 26...
Time detection plate, 27...first detection lever, 29...second detection lever.

Claims (1)

[Claims] 1. A first detection means consisting of a first and second detection plate that changes in accordance with the setting of the alarm time and detects the phase of the hourly and minute gears, and a part of the minute leaf that detects the phase of the hourly and minute gears. A leaf having a protrusion is disposed, a second detection means interlocks with the protrusion, a only switch that operates and outputs a signal when both of the detection means match, and an alarm device that is operated by the signal of the switch. In the leaf type digital watch, the first detection means has a first detection lever that is interlocked with both of the detection plates, and the second detection means has a second detection lever that is interlocked with the protrusion of the minute leaf. , the switch is related to either one of the detection levers, and the detection levers are connected in a movable manner, so that the biasing force of the switch can be applied to both the detection levers and the detection plates. Features: Wake-up time detection device.