JPH0434473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an analog clock that indicates the time by driving hands with a step motor.

[Technical background of the invention and its problems]

This type of analog timepiece is provided with a reset lever that rotates in conjunction with the pulling out operation of the winding stem and contacts a reset electrode in order to reset the electronic circuit when the hands are set.

This reset lever is normally rotatably attached to a pin provided on the main plate, and is designed to rotate parallel to the main plate surface in conjunction with the pull-out operation of the winding stem, so it requires space for rotation. be. Also,
It is necessary to arrange a reset electrode that the reset lever comes into contact with, but not only does this require space for the reset electrode, but it also requires a structure to electrically connect the reset electrode and the circuit board. This caused watches to become complicated and large.

[Purpose of invention]

This idea was made with attention to these points, and its purpose is to effectively utilize the space of the watch by installing the switch lever and the electrode that the switch lever contacts. The objective is to provide an analog clock that can be miniaturized as a whole.

[Key points of the idea]

In order to achieve the above purpose, this invention forms a recess in the part of the main plate located below the stator, extends the switch lever from the outside of the stator through the recess to the space inside the stator, and extends the switch lever from the outside of the stator through the recess to the space inside the stator. Bend it vertically and insert it into the through hole of the circuit board installed on the opposite side of the stator base plate, and when the winding stem is pulled out, the switch lever will rotate and the tip will come into contact with the electrode on the side wall of the through hole. It was designed so that

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 8.

Figures 1 and 2 show wristwatch movement 1.
The movement 1 is shown as viewed from the bottom side, and the movement 1 includes a base plate 2 made of synthetic resin and a step motor 3, a gear train mechanism 4, a switching correction mechanism 5, a battery 6, etc. The step motor 3 includes a stator 9 connected between both ends of a magnetic core 8 around which a coil 7 is wound, a circular hole 9a formed in the middle of the stator 9, and a rotor 10 rotatably disposed in the circular hole 9a. The rotor 10 rotates in steps of half a rotation based on the magnetic field generated in the coil 7. The intermediate portion of the stator 9 is spaced relatively far from the magnetic core 8, and an arrangement space 3a is secured between the stator 9 and the magnetic core 8.

The train wheel mechanism 4 is provided between the base plate 2 and a train wheel bridge 11 made of synthetic resin and placed opposite thereto. That is, as shown in FIG. 3, an opening 13 is formed in the base plate 2, and a metal center tube 14 is press-fitted into this opening 13. The center tube 14 is composed of a disc part 15 facing inside the opening 13 and a cylindrical part 16 projecting upward from the center of the disc part 15. An hour wheel 17 is provided on the upper side of the center tube 14, and the hour wheel 17 consists of a pointer tube 18 and a gear 19. mated to,
A gear 19 is slidably supported on the upper surface of the center tube 14.

The second wheel 20 is located on the lower side of the center tube 14.
The second gear 20 consists of the second gear 21 and the second pinion 22, and the second gear 21 is the second pinion 2.
2 via a slip mechanism 23.
Further, the second pinion 22 has a pointer tube 24 integrally,
This pointer tube 24 is the cylindrical portion 1 of the center tube 14.
It is inserted concentrically and rotatably through the inner periphery of 6 and protrudes above it. A fourth wheel & pinion 25 is disposed below the second wheel & pinion 20, and this fourth wheel & pinion 25 is supported by the train wheel bridge 11 and integrally has a pointer shaft 26. 20 pointer tube 2
It is rotatably inserted through the inside of 4 and protrudes above it. Further, a third wheel 27, an intermediate wheel 28, and a rotor 10 of the step motor 3 are rotatably supported between the main plate 2 and the train wheel bridge 11. Then, the third pinion 30 of the third wheel 27 is connected to the fourth pinion 31 of the fourth wheel 25, the third pinion 32 of the third wheel 27 is connected to the second gear 21 of the second wheel 20, and the third pinion 32 of the third wheel 27 is connected to the second pinion 21 of the second wheel 20,
The fourth gear 33 of is connected to the intermediate pinion 34 of the intermediate wheel 28,
The intermediate gears 36 of the intermediate wheel 28 mesh with the rotor pinion 37 of the rotor 10, and furthermore, the second pinion 22 of the second wheel & pinion 20 and the gear 19 of the hour wheel 17 are connected via a minute wheel 35.

Reference numeral 38 indicates a hand indicating the time, and is composed of a second hand 38a, a minute hand 38b, and an hour hand 38c. The second hand 38a is attached to the upper end of the pointer shaft 16 of the second wheel & pinion 15, the minute hand 38b is attached to the upper end of the pointer tube 13 of the second wheel & pinion 9, and the hour hand 38c is attached to the upper end of the pointer tube 8 of the hour wheel 7 by press fitting. ing. The third wheel & pinion 27, the fourth wheel & pinion 25, and the intermediate wheel 28 are integrally formed of, for example, plastic made of polyacetal mixed with reduced potassium titanate whiskers as a reinforcing material. and the second pinion 12 are each made of metal.

Therefore, the operation of the step motor 3, that is, the step rotation operation of the rotor 10, is transmitted to the fourth wheel & pinion 25 via the intermediate wheel 28, and this fourth wheel & pinion 25
It rotates together with 8a at a speed of 3600 r.ph. Then, the rotational movement of the fourth wheel & pinion 25 is transmitted to the second wheel & pinion 20 via the third wheel & pinion 27, and this second wheel & pinion 20 moves to the minute hand 38.
Rotates together with b at a speed of 1r.ph. Further, the rotational movement of the center wheel 20 is transmitted to the hour wheel 17 via the hour wheel 35, and this hour wheel 17 rotates integrally with the hour hand 38c at a speed of 112 r.ph. are the second hand 38a, minute hand 38b and hour hand 3.
8c.

On the other hand, the switching correction mechanism 5, as shown in detail in FIG.
and a switch lever 46. The winding stem 40 is slidably and rotatably provided on the main plate 2, and a ratchet wheel 41 is fitted in the middle of the winding stem 40. The ratchet wheel 41 is held slidably in the axial direction of the winding stem 40 by a spline connection or the like, and rotates integrally with the winding stem 40 when the winding stem 40 rotates. The small iron car 42 meshes with the sun wheel 35, and this small iron car 4
2, the above-mentioned screw wheel 41 engages with the screw wheel 41 in a detachable manner according to its sliding. The mandarin duck 43 is rotatably supported via a pin 47, and the engaging portion 48
and a pressing portion 49 are integrally formed, and the engaging portion 48 engages with a stepped portion 50 of the winding stem 40.
The cannula 44 is rotatably supported via a pin 51 and integrally has an engaging portion 52 and a contact lever 53, and the engaging portion 52 is connected to the stepped portion 54 of the suspension wheel 41.
is engaged in. An interlocking pin 55 is attached to the mandarin duck 43, and this interlocking pin 55 engages with an L-shaped guide groove 56 formed in the canopy 44. Therefore, when the winding stem 40 is pulled out in the projecting direction, the mandarin duck 43 rotates clockwise in the figure (hereinafter the same) using the pin 47 as a fulcrum, and the interlocking pin 55 moves along the guide groove 56. be.

The stop lever 45 integrally extends from the back presser 60 in the shape of a leaf spring, and has an inclined step part 61 in the middle part, as shown in detail in FIG. The base end side is a release part 62, the distal end side is a sliding part 63, and a stop part 64 bent at a right angle is formed at the distal end of the sliding part 63. The pressing part 49 of the mandarin duck 43 is disposed to face the middle part of the stop lever 46, and the pressing part 49 moves from the release part 62 over the stepped part 61 in accordance with the rotation of the mandarin duck 43 to the sliding contact part 63. This transition causes the stop lever 45 to elastically bend and the stop portion 64 to descend. The tip of this stop portion 64 faces the upper surface of the intermediate wheel 28. On the upper surface of the intermediate wheel 28, convex portions 65 are formed concentrically corresponding to the stop portions 64 and projecting at regular intervals. These convex portions 65... are formed, for example, in the shape of a mountain in cross section. Further, a positioning lever 66 integrally extends from the back presser 60, and the interlocking pin 5 of the mandarin duck 43 is attached to the side edge of the positioning lever 66.
A wave-shaped positioning portion 67 is formed to elastically abut the winding stem 5 and hold the winding stem 40 in a predetermined position.

The switch lever 46 is rotatably supported via a pin 70, has an operation piece 71 in the middle part, contact parts 72a and 72b on both sides, and has a bent piece on the tip edge of the operation piece 71. 74 is formed. As shown in FIG. 9, the intermediate portion of the winding stem 40 is formed as an operating section 75 having a rectangular cross section, and the bent piece 74 of the switch lever 46 faces one side of the operating section 75. .

On the other hand, as shown in FIG. 2, the main plate 2 has a liquid crystal display element 80 in a part thereof, a circuit board 81 covering almost the entire bottom surface, and an insulating sheet 82 interposed between the circuit board 81 and the circuit board 81. A metal reinforcing plate 83 that also serves as a conductive member is provided so as to cover both sides. Then, electrodes 84a and 84 are provided on the circuit board 81 as a switch part for the liquid crystal display element 80.
The electrodes 84a, 84b face the arrangement space 3a formed in the step motor 3, respectively. Contact lever 53 formed on cannula 44
As shown in FIG. 6, it extends into the arrangement space 3a of the step motor 3 through the recess 2a formed in the base plate 2, and furthermore, the extending end thereof stands up at right angles to the side where the circuit board 81 is arranged. The bent portion 53a faces between the electrodes 84a and 4b. Further, the tips of the contact portions 72a and 72b formed on the switch lever 46 are connected to electrodes 85.
It faces the arrangement portions a and 85b.

Next, the operation of the movement 1 configured as described above will be described.

A reversing pulse is supplied to the coil 7 of the step motor 3 every second, and the rotor 10 rotates in steps every second. In normal operation, that is, when the winding stem 40 is in the position shown in FIG. The operation of the rotor 10 is transmitted to the second hand 38a, minute hand 38b, and hour hand 38c via the gear train mechanism 4, and the time at each point in time is sequentially indicated by an analog display.

From this state, as shown in FIG. 44 rotates clockwise, and this cannula 44
As the contact lever 53 rotates, the bent portion 53a of the contact lever 53 comes into contact with the electrode 84a, and this contact switches the digital display on the liquid crystal display element 80 from, for example, a normal mode to a correction mode. When the winding stem 40 is rotated in the forward and reverse directions in this position, the operating portion 75 of the winding stem 40 and the bending piece 74 of the switch lever 46 come into contact, and the switch lever 4
6 rotates in the forward and reverse directions and its contact portions 72a, 72
b alternately contacts the electrodes 85a and 85b to increase or decrease the displayed mode value and set it to a predetermined value.

When the winding stem 40 is further pulled out and set in the position shown in FIG. do. Then, as the mandarin duck 43 rotates clockwise, the pressing part 49 of the mandarin duck 43 moves from the release part 62 of the stop lever 45 over the inclined step part 61 to the sliding contact part 63, and this transition causes the stop lever 45 to move. The stop portion 64 is elastically bent and lowered, and its tip enters and abuts against the side surface of one of the convex portions 65 of the intermediate wheel 28, and this abutting engagement prevents the rotation of the intermediate wheel 28. It resists the driving force and stops. Also, due to the counterclockwise rotation of the cannula 44, the tsuzumi wheel 41 moves as shown in Fig. 8a.
From this state, it slides to the right and engages with the small iron wheel 42, as shown in FIG. Furthermore, Kannuki 4
4, the bent portion 53a of the contact lever 53 comes into contact with the other electrode 84b, and this contact opens the circuit between the electrodes 85a and 85b.

In this state, when the winding stem 40 is rotated, this movement is transmitted from the tsuzumi wheel 41 through the small iron wheel 42 to the day wheel 35, and further from the day wheel 35 to the second pinion of the center wheel 20. 22 and the hour wheel 17, so that the minute hand 38b and hour hand 38c can be set with the second hand 38a stopped. When the second pinion 22 rotates, the second pinion 22 rotates while slipping against the second gear 21 based on the slip mechanism 23. Also, when the winding stem 40 rotates,
The operating portion 75 of the winding stem 40 comes into contact with the bent piece 74 of the switch lever 46, but as the winding stem 40 rotates further, the edge of the operating portion 75 passes over the bent piece 74. Therefore, the winding stem 40
The rotation of the switch lever 46 can be continued without any trouble, and the switch lever 46 can be rotated by the contact of the operating part 75 with the bending piece 74, and the contact parts 72a and 72b can be brought into contact with the electrodes 85a and 85b. Since the circuit of these electrodes 85a and 85b is open, the digital display will not be affected in any way.

After setting the minute hand 38b and hour hand 38c in this manner, the winding stem 40 is pushed in and set in the position. By this operation, the tip of the stop lever 45 separates from the side surface of the convex portion 65 of the intermediate wheel 28, and the rotation restriction on the intermediate wheel 28 is released. Also, the stop lever 41 separates from the small iron wheel 42, and its meshing is released. Therefore, the second hand 39 starts rotating again in conjunction with the rotor 10. In addition, each position of the winding stem 40,
, is switched by the interlocking pin 55 of the mandarin duck 43.
This can be performed accurately by the click-stop operation based on the elastic contact between the positioning lever 66 and the positioning portion 67, and each state can be maintained accurately.

Incidentally, the step motor 3 has an arrangement space 3a, and a part of the contact lever 53 as a functional component of the watch is arranged within this arrangement space 3a. The contact lever 53 can be arranged in the arrangement space 3a inside the step motor 3.
Since a part of the step motor 3 can be placed
Restrictions on the placement position of the step motor 3 are also relaxed, and the placement position of the step motor 3 can be selected with some degree of freedom, thereby making it possible to increase the arrangement density of parts and make the entire structure compact.

[Effect of idea]

As explained above, according to this invention, since the switch lever rotates under the stator, not only can the space under the stator be effectively used, but the switch lever can also pass through the recess on the underside of the stator and reach the space inside the stator. It is extended, the tip is bent vertically, and inserted into the through hole of the circuit board attached to the upper side of the stator, and when the winding stem is pulled out, the switch lever contacts the electrode on the side wall of the through hole, so that the stator The space inside the stator surrounded by the coils can be used effectively, thereby making it possible to downsize the entire watch.

[Brief explanation of drawings]

Figures 1 to 8 show an embodiment of this invention, with Figure 1 being a bottom view of a wristwatch movement, and Figure 2 being a bottom view of the movement with a circuit board and reinforcing plate attached to the bottom side of the movement. , Fig. 3 is a sectional view of the wheel train mechanism, Fig. 4 is a bottom view of the switching correction mechanism, Fig. 5 is a side view of the stop lever arrangement, and Fig. 6 is the arrangement of the contact lever extending from the cannula. FIG. 7 is an explanatory view showing the operational relationship between the winding stem and the switch lever, and FIG. 8 is a cross-sectional view of the engagement/disengagement mechanism between the winding stem and the wheel train mechanism. 3... Step motor, 3a... Arrangement space, 7... Coil, 8... Magnetic core, 9... Stator, 9a... Circular hole, 10... Rotor, 38...
Pointer, 53...Contact lever (functional part).

Claims (1)

[Claims for Utility Model Registration] A step motor consisting of a base plate, a rotor, a stator, and a coil, which is attached to the base plate and has a space provided inside the stator surrounded by the stator and the coil, and the base plate. a winding stem rotatably mounted on the outside of the stator of the main plate so as to be movable parallel to the surface of the main plate; a switch lever that is rotated; a through hole is formed in a portion that is provided on the opposite side of the stator from the base plate and covers the space inside the stator;
a circuit board having an electrode formed on a side wall of the through hole, a recess extending from the outside of the stator to the space inside the stator is formed in the base plate, and the switch lever extends from the outside of the stator through the recess. It extends to the space inside the stator, and its tip is bent vertically and inserted into the through hole of the circuit board, and when the winding stem is pulled out, the switch lever is rotated, and the tip is inserted into the through hole. An analog clock made of contact with the electrode on the side wall of the hole.