JPS5821585A - Time piece - Google Patents

Abstract

PURPOSE:To prevent oscillation of a time pointer by forming a dial plate of a magnet while a time pointer is formed of a magnetic material and vice versa. CONSTITUTION:A minute pointer 18 and a timer pointer 19 are operated in contact with a dial plate 3. The minute pointer 18 is so arranged that only the tip thereof contacts the dial plate 3. The minute pointer 18 and the time pointer 19 are made of a magnet while the dial plate 3 made of a magnetic material. It is also possible that the former 18 and 19 is made of a magnetic material and the later 3 made of a magnet. Otherwise, in the dial plate 3, only the place where the minute pointer 18 is at rest may be made of either a magnet or magnetic material. This provides a time piece free of oscillation in the pointers without increase in the number of parts and difficulty in the assembly work.

Description

[Detailed description of the invention] This invention is for making a watch.

Conventionally, in timepieces that move in steps, a spring member is used to round the hands to eliminate the wobbling of the hands that occurs when the hands are moved in steps. FIG. 1 shows an example. In the figure, 711j dial, 72 is the upper wall of the case, 73 is the main plate,
This is the lower wall of the 74 bride case.

75 is the second hand, 76F1 is the minute hand, and 77 is the hour hand.
It is sequentially and rotatably fitted onto the cylindrical protrusion 78 of the Ti base plate 73. The shaft portion of the second hand wheel 75Jll passes through the inside of the cylindrical protrusion 78. Reference numeral 79 indicates a date wheel supported on the upper wall of the case, and an hour wheel 771 and a minute wheel 761 are meshed with the small gear portion 79M and the large gear portion 79b, respectively. The second hand wheel 75m is moved in steps every second by a step motor (not shown). Reference numeral 80 denotes a wobbling prevention spring, which urges the hour hand wheel 77 and the minute hand wheel 76 against the main plate 7311. Reference numeral 81 denotes another wobbling prevention spring, which urges the second hand wheel 75M against the case lower wall 74.

By providing the wobbling prevention springs 80, 811', wobbling when the dowels 75 to 77 are moved in steps is prevented. However, this has resulted in problems such as an increase in the number of parts and difficulty in assembly.

Therefore, an object of the present invention is to provide a timepiece that can prevent the hands from wobbling without increasing the number of parts or making assembly difficult.

An embodiment of this invention is shown in FIG. Note that parts corresponding to those of the clock in FIG. 1 are given the same reference numerals, and their explanations will be omitted. That is, to explain the different parts from those in FIG. 1, the second hand 75. The minute hand 76 and the hour hand 77 are each made of a magnet, and the dial 71 is made of a magnetic material. 1st
The anti-wobble springs 80 and 81 shown in the figure are not provided.

Because of this configuration, an attractive force is generated between the second hand 75 and the dial 71, and as a result, the second hand 75 in steady-double movement moves to 1.
The suction force reduces the wobbling that occurs when the seconds are stopped in increments every second.

Similarly, the wobbling of the minute hand 76 and hour hand 77 is also reduced. On the other hand, for conventional wobbling prevention, 80.81
Since this eliminates the need, the number of parts is reduced accordingly, and assembly becomes easier.

3 to 10 show other embodiments. In FIG. 3, 3 is a dial, 6 is a transparent front cover, 13 is a movement, 18 is a minute hand, and 19 is an hour hand. The minute hand 18 and the hour hand 19 are moved in contact with the dial 3. minute hand 18
Only the tip touches the dial 3. Minute hand 18 and hour hand 1
9 is made of a magnet, and the dial 3 is made of a magnetic material. Note that the minute hand 18 and the hour hand 19 may be made of magnetic material, and the dial 3 may be made of a magnet. The dial 3 may be made of a magnet or magnetic material only at the point where the minute hand 18 stops.The movement is constructed as follows. That is, as shown in FIGS. 4 and 5, the iron core 22 constituting the step motor 21 is formed into a substantially annular shape, and magnetic poles 221122b that mutually surround the rotor 23 are formed at both ends of the iron core 22. An 11-needle coil 28 is wound around the parts other than the magnetic poles 22m and 22b, a gear mechanism 24 and a circuit block 25 are arranged in the space inside the iron core 22, and these are placed between an upper case 26 and a lower case 27. It is a companion to store. The iron core 22 is made of a magnetic material such as permalloy or an electromagnetic soft iron rod. One magnetic pole 22m of the iron core 22 is formed by a tt-extended portion with the same curvature as the intermediate portion, and the other magnetic pole 22b is bent into a V-shape. Rotor 23
The distances A, B, and C (FIG. 6) from each part of the magnetic poles 221 and 22b are A(B(C). The coil 2B is provided in the upper and lower cases 26 and 27, and has a round cross-section approximately semicircular. The rotor 23 is fixed to a shaft 30 (third factor), and both ends of the shaft 30 are connected to the hole 23' of the lower case 27 and the bottle 23' of the upper case 26. The rotor 23 is rotatably supported. An output gear 301 is provided on the shaft body 30 of the rotor 23. As shown in FIG. There are nine different magnetic poles, each with two different magnetic poles.

The degenerating mechanism 24 includes a second wheel 31 that meshes with the output gear 301 of the rotor 23, a minute wheel 18', and the like.

The second wheel 31 is attached to a boss 31' of the upper case 26.

The circuit board 25 drives the motor 21, is provided on a printed circuit board 33 (FIG. 5), and has a circuit configuration as shown in FIG. 9. That is, 34 is an inverter, 35 is a crystal resonator, 36 is a capacitor, 37 is a trimmer capacitor, 38 is a frequency dividing circuit, 39 is a waveform shaping circuit, and 40 is a drive circuit. Output terminal 41 of drive circuit 40
8 and 41b are connected to the connection terminal 64 of the coil 28. Inverter 34, branch circuit 38, waveform shaping circuit 3
9 and the drive circuit 40 are one-chip integrated circuits,
It consists of The voltage is obtained from a secondary battery charged from a power source solar battery (not shown) in the circuit block 25. To explain the printed circuit board 33, the outer circumferential shape is formed into a substantially circular shape smaller than the motor coil 28, and a circular cutout 33M is provided inside so that the output gear 23 and the second wheel 31 do not come into contact with each other. 36' is a capacitor, and 36' is a terminal.

The rotor 21t of the motor 21 rotates once every 30 seconds. If the reduction ratio from the rotor 23 to the minute wheel 31 is expressed as a plane, the minute wheel 31 will rotate 120 times in 30 seconds. As shown in FIGS. 3, 5, and 7, the minute wheel 31 is press-fitted into the center of the minute hand shaft 16 that passes through the upper case 26. The minute hand shaft 16 is in a loose state with the hole 46 of the upper case 26, and the minute hand shaft 16a
A minute hand bushing 17 is press-fitted into one end. A needle turning knob 32 is press-fitted to the other end of the minute hand shaft 16. Fixed type car 4 with 11 pieces of music on the surface of the upper case 26
7 are integrally formed (Fig. 3, Fig. 5, Fig. 7 λ
Reference numeral 48 denotes a nine internal tooth 1 which is integrally provided on the back 111 of the base of the hour hand 190 and has 12 teeth. 49 is an eccentric cam provided integrally with the minute hand pusher 17, and a center hole 50 provided at the base of the hour hand 190 (Fig. 7, 9, and 8).
K is inserted. The minute hand 18 has a notch 181, and is connected to the protrusion 17a of the minute hand pusher Li2 to form a loose fit 11.

The operation of the movement 13 will be explained. An output waveform as shown in FIG. 1θ is applied from the circuit block 25 to the coil 28 of the motor 21, and current flows alternately at 30 second intervals. Ninth, magnetic poles 22a e 2 at both ends of the iron core 220
2b are alternately magnetized. On the other hand, the rotor 23 is magnetized into two poles as described above, and the distance between the magnetic poles 221 and 22b is A(B(C), so the rotor 23 is magnetically balanced in nine directions. (direction of arrow P in Figure 6)
. Therefore, as the magnetic poles 221 and 22b are alternately magnetized as described above, the rotor 23 rotates in one direction (the y direction of the arrow in FIG. 6). 230 rotations of rotor is 2nd wheel & pinion 3
The rotation of the minute hand wheel 18' is transmitted to the nine minute hand pusher 17, which is press-fitted into the minute hand shaft 16, and the minutes are displayed. The minute hand droplet 17 is an eccentric cam 49
The internal gear 48, which is integrated with the hour hand 19, is pivoted through the internal gear. On the other hand, the internal gear 48 meshes with the fixed gear 47 that is integral with the upper case 26.The eccentric cam 4901 rotation, that is, one rotation of the minute hand 18, causes the hour hand 19 to rotate once, and the hour can be displayed. .

In this way, the minute hand 18 and the hour hand 19 are driven, but due to the magnetic attraction force generated between the minute hand 18 and hour hand 19 and the dial 3, the minute hand 18 and the hour hand 19 are driven when the minute hand 18 and the hour hand 19 step. This prevents wobbling. The time is set by forcibly turning the hand turning knob 32, which is integrated with the minute hand wheel 18' and the minute hand shaft 16, from the outside. At this time, the rotor 23 is also rotated, but there is no separate adverse effect.

As described above, in the timepiece of the present invention, since one of the dial and the clock hands is made of a magnet and the other is made of a magnetic material, it is possible to reduce the wobbling that often occurs when the clock hands are moved in steps. Moreover, the conventional anti-wobble spring is unnecessary, the number of parts is reduced, and assembly is facilitated.

11 to 13 show proposed examples of solar cell watches. Conventionally, the solar cell of a solar cell watch was provided with a window on the dial, and in the case of 7 IIK, light 9 and i9 were installed outside the dial. However, it is not aesthetically pleasing. In addition, if the dial is set up, the hour and minute hands will cover the solar cells and block the light, so there will be times when no voltage is generated in the solar cells.

The solar cell clock lines shown in FIGS. 11 to 13 solve this problem. In the figure, 101 is a movement case, 102 is a dial, 103 is a minute hand, 10
4 is an hour hand, 105 is a minute hand 104K, and nine solar cell elements are provided. The outer shape of the case 101 is formed into a circular shape with a radius that is approximately the same as the length of the minute hand 103. 106 is a minute wheel, 107 is a sun wheel, and 108 is an hour wheel. 1G9a
, 109b is a connection terminal that connects the minute hand 103 and the minute wheel 106, and 1101.110b is a connection terminal that connects the minute wheel 106 and the printed circuit board 111.

The solar cell elements 105 are connected in series, with one pole connected to a terminal 1091 and the other pole connected to a terminal 109b. The minute hand 103 is connected to the minute wheel 106K by press-fitting, and moves integrally with the minute wheel 106. and,
Connection terminals 109a and 109b are connected by press-fitting the minute hand 103.
is connected to the connection terminal 110L110bK. Since the connection terminals 110M and 110b are attached to the minute wheel 106K, they move together with the minute wheel 106. The printed circuit board 111 is fixed to the movement case 101 and the tail is fixed to the movement case 101.
t112 points 110m' and 110b' are in contact with the printed circuit board 111K, and therefore the solar cell element 10
The positive and negative terminals of No. 5 are connected to the printed circuit board 1110 circuit and connected to the secondary battery! I! Continued. FIG. 13 is a circuit block diagram, in which 1o5 is a solar cell, 112 is an overcharge prevention circuit, 113 is a secondary battery, 114 is a clock operation circuit, and 115 is a motor.

The operation will be explained. The minute wheel 106 is decelerated by the rotor 115 and rotates once every hour. The rotation of the hour wheel 108 is transmitted from the minute wheel 106 via the minute wheel 107.
It rotates once in an hour. When light hits the solar cell element 105, a current flows and the connection terminals 109as 109b-110m
, 110b, f are charged to the secondary battery 113 via the lint board 111. In this way, the solar cell element 105
Since the hour and minute hands 103 are provided in the minute hand 103, there is no possibility that the solar cell will be covered by the hour and minute hands and no current will be generated, unlike the conventional case where they are provided on the dial. The rounding improves the power generation effect of solar cells. Also, dial 1
Since there is no need to configure a solar cell in 02, the appearance is improved.

Note that the solar cell element 105 may be provided on the hour hand 104 or the second hand.

[Brief explanation of drawings]

The first part is a cross-sectional view of the conventional example, the second figure is a cross-sectional view of one embodiment of the present invention, the third figure is a cross-sectional view of another embodiment, the fourth figure is a plan view of the inside of the movement, and the fifth figure is a cross-sectional view of the conventional example. The figure is an exploded perspective view of the same, FIG. 6 is a partially enlarged plan view of the iron core, FIG. 7 is an exploded perspective view of the gear mechanism, and FIG. 8 is a bottom view of the base end of the hour hand. Figure 9 is an explanatory diagram of the Tanabata pivot circuit, Figure 10 is the output waveform of the motor electric circuit, Figure 11 is a front view of a proposed example of a clock different from this invention, and Figure 12. is a partial sectional view thereof, and FIG. 13 is an explanatory diagram of the circuit.

Claims (1)

[Claims] A clock in which one of the dial and hands is made of a magnet, and the other is made of a magnetic material.