JPH0335638B2 - - Google Patents

Abstract

A motor module for an electronic analog watch comprises a single mounting plate which is preferably formed by the stator 2 of the motor. The rotor 32 is mounted in the plate 2 by way of members 26 and 30 which form bearings for the rotor 32. The spindles 18, 22 and 24 for the hands are also mounted on the stator 2 by means of a tube 16. Finally, the spindle 44 for gears 46, 47 and 48 between the rotor and the spindles for the hands passes through the stator 2, being supported therein by a bush 42. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to an electronic timepiece with an analog display, which is provided with: - a motor having a coil, a stator, and a rotor; - a pointer; a spindle is provided; - a pointer supported by the pointer spindle; - a gear mechanism coupling the rotor and the pointer spindle; - an electronic circuit; The electronic circuit includes an integrated circuit, an oscillator, and a conductive member electrically connecting the integrated circuit to the oscillator and a motor, - a support structure is provided, and a rotor, a pointer spindle, and a rotor are mounted on the support structure; and in which a gear mechanism is positioned and supported, and - a battery is provided for powering the motor and the electronic circuit.

BACKGROUND OF THE INVENTION Conventional analog display electronic watches have a movable member housed in a casing with a glass plate. The support structure of this movable member is composed of two plates and a connecting bridge connected by a columnar member. The gear, pointer spindle and motor rotor are rotatably supported in bearings mounted on different bridge members or plates. A printed circuit is also mounted on one plate, and a housing for accommodating a battery is also provided on the movable member.

In order to reduce the overall thickness of the watch, a structure has already been proposed in which the support structure for the movable part is omitted and the movable part and the fixed part can be attached directly to the bottom of the casing and, as much as possible, to the inner surface of the dial. has been done. For example, French patent application no.
The structure shown in No. 21862 makes it possible to significantly reduce the thickness of the watch, but the production of such a watch requires precision work. Therefore, this structure cannot be applied to normal quality watches.

What has been proposed for the same purpose is to mount the gears in an overhanging or cantilevered position on a single plate. The movable member is rotatably supported in a small ball bearing bearing which is itself mounted on a projection or plug forming an integral part of the plate. The wheels or pinions of the same gear will therefore necessarily be placed on the same side of the plate. A design of this kind is disclosed in Swiss Patent No. 610178. This structure is also extremely complex from a watch manufacturing and assembly point of view. Moreover, this Swiss patent only applies to mechanical watches, and therefore does not solve the problem of installing a motor.

French Patent No. 7615399 discloses a movable part of a timepiece of the usual type with two base plates. However, in this watch, the stator of the motor forms an intervening bridge member, and this bridge member has one of the pivots of a given wheel.
one is rotatably mounted and the other pivot is mounted on one of the substrates. Although this design therefore makes it possible to reduce the cost of intervening bridge parts, the overall construction of the watch is fundamentally unsatisfactory and furthermore does not allow for a reduction in thickness.

Problems to be Solved by the Invention In order to eliminate the above-mentioned drawbacks, the present invention aims to solve the following problems:
A simple analog display electronic watch that can be easily machined and assembled in mass production, has a significantly reduced thickness, and allows for large spacing between various parts to increase the reliability of the watch. The goal is to provide the following.

Means for Solving the Problem This problem is solved by the following configuration shown in claim 1. That is, the electronic timepiece is a wristwatch, and the wristwatch includes a casing having a bottom, a glass forming a sealed cavity with the casing, and a fixing member integrally formed with the bottom. , the support structure and the electronic circuit are incorporated into the hollow chamber independently from each other and assembled together with the casing using the fixing member, and at least the electronic circuit and the coil are connected to the stator. The battery is permanently fixed to the casing through the casing, and the battery is fixed to the bottom.

Further, according to the invention, the electronic timepiece is a wristwatch, the wristwatch comprising a casing having a bottom, a glass forming a sealed hollow chamber with the casing, and a fixing member formed integrally with the bottom. The support structure and the electronic circuit are incorporated independently of each other inside the hollow chamber and assembled together on the casing using the fixing member, and at least the electronic circuit and the coil are directly connected to the latter. is permanently fixed to the casing via a stator, a battery is fixed to the bottom, and the watch further comprises: - a dial, a ring member for displaying the date and a disc for displaying the day of the week; the ring member and the disc are disposed between the stator and the dial; the wristwatch further includes a wheel for driving the date display ring member and the day of the week display disc; It has a row and two apertures that do not extend to the peripheral teeth, each of the apertures being configured to cut out a resilient arm that is an integral part of the wheel.

Advantages of the invention According to an embodiment of the invention, the support structure which is the stator of the motor can at the same time be a support for the rotor and a support for the gear mechanism. All movable mechanical parts are thus mounted on a single support structure. This simplifies the mechanical processing of this support structure. However, if the structural support is not the stator itself, it can support other parts besides the rotor and the gear mechanism, for example the stator.

The support structure, the electronic circuit and the battery are integrated inside the casing independently of each other. Therefore, the assembly of the wristwatch becomes significantly easier, the structure becomes simpler, and the thickness can be reduced.

The drive wheel described in claim 10 (second invention) has the following advantages. That is, one of the advantages is that it can be used as a simple driving means for a ring member for displaying the date and a disk for displaying the day of the week. Furthermore, the wheel, the date display ring member, and the day of the week display disk can be used as a coupling mechanism that reliably engages and can be easily released when necessary.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Figures 1 and 2b show the construction of a timepiece according to the invention. This watch has hands that display hours, minutes, and seconds, a ring member that displays the date, and a wheel that displays the day of the week.

The watch has a monochrome casing 102 which is advantageously formed from an injection molded plastic material.
have. Seen in plan, the casing 102
has a substantially circular shape with two projections 102a and 102b, which are used as projections for attaching, for example, an arm belt or a bracelet (not shown).

The casing 102 has a sidewall 106 and a bottom 104 that define a casing periphery and a mounting rim. The casing 102 has a dial 108
and closed by glass 110. glass 1
10 is fitted into a shoulder 106a provided on the side wall 106. The surrounding area of the dial 108 is
It is held in place by an annular seal 112 located on portion 106b of side wall 106 and interposed between the dial and the glass.

The interior space defined by casing 102 and dial 108 accommodates a motor module. In an advantageous embodiment of the invention:
This motor module has a Lavet stator with a larger surface area than normal ones.
It consists of a type motor. As usual, the stator acts as a magnetic circuit for guiding the magnetic flux generated by the coils and as the only plate for mounting the gearing of the motor module. The stator is composed of, for example, an iron-nickel alloy commercially available under the trade name "VACOPERM". The thickness of this stator is, for example, 0.7 mm.

As can be seen in FIG. 1, the stator 2 has a substantially shallow V-shaped configuration, the free ends 2a and 2b of which are connected to the lobes 4 and 4' of the coil core 6. Coil 8 is mounted on top of core 6 in the usual manner. A substantially circular hole 10 (FIG. 2b) in which the rotor of the motor is accommodated is provided in one of the V-shaped legs formed by the stator 2.
It is formed. Cutouts 12 and 12' are formed in the stator co-linear with the hole 10;
and defines a narrow portion that appropriately separates the two poles of the stator. In this way, the stator is made to occupy only a portion of the surface area of the watch.

Furthermore, the stator 2 is formed with a predetermined number of holes for mounting the gears of the motor module, as best shown in Figures 2a and 2b.

Hole 14 for attaching a pointer spindle
is provided almost at the apex of the V-shaped body formed by the stator. A guide tube 16 is passed through the hole 14 and projects beyond the upper surface of the stator. tube 1
A second hand spindle 18 is engaged within the second hand. A second hand gear 20 having a second hand wheel 20a and a second hand pinion 20b is connected to the lower end 18 of the spindle 18.
It is fixed at a. A gear wheel 22 supporting a minute hand is attached to the outer surface of tube 16. This gear 2
A minute hand is attached to the end of 2. gear 22
has a tube 22a, a minute hand wheel 22b, and a minute hand pinion 22c. This assembly is rotatable as a unit. A cylindrical wheel 24 is attached to the outer surface of the tube 22a of the member 22, and this cylindrical wheel 24 is connected to the tube 24 to which the hour hand is attached.
a and on the other hand the hour hand wheel 24b
and an hour hand pinion 24c.

Figure 2b also shows the installation of the motor rotor into the stator bore 10. A cup-shaped member 26 is press-fitted into the hole 10. Therefore, the side wall 26a of the cup-shaped member 26 is fixed to the stator 10, and the cup-shaped member 26 is fixed to the flange 26.
axially positioned by b. The bottom portion 26c of the member 26 forms one bearing 28. Member 26
The plate 30, which is press-fitted onto the open end of the
A hole 30a is provided which forms a second bearing for the rotor of the motor. The rotor 32 has a shaft 34 as usual, and magnets 3 are mounted on this shaft 34.
5 is installed. One end of the shaft 34 is
A pivot 34' is formed which engages the bearing 28. The other larger diameter end 34'' of the shaft 34 is
It is bearingly supported within the bore 30a and has two extending projections or spline portions 36 and 36'. These parts 36, 36' act as output pinions.

As is clear from the above description, when manufacturing this motor module, the rotor 32 of the motor
has already been positioned relative to the stator using members 26 and 30 that define the rotor bearings.
Therefore, when assembling the movable member, the difficult work of centering the rotor relative to the stator can be omitted.

As can be seen from FIG. 2b, the rotor shaft 34
The parts 36 and 36' fixed to the
It is engaged with the second hand wheel 20a. The connection between the second hand pinion 20b and the spindles for the hour and minute hands is effected by a gear system, which will be described later.
The stator 2 has a hole 40 in which a flange 4 is inserted.
2a is press-fitted. The sleeve 42 has an axial bore 42b that serves as a bearing for the spindle 44. This spindle 44 projects at both ends of the sleeve 42, ie on both sides of the stator 2. A wheel 46 is fixed to one end thereof. A pinion 47 is fixed near the other end. Wheel 46 engages pinion 20b, while pinion 47 engages minute hand wheel 22b. End 44a of spindle 44 acts as a pivot for gear 48. gear 48
As usual, wheel 48a and pinion 48
It has b. Spindle 44 therefore has a dual function: it fixes wheel 46 and pinion 47 in rotation together and acts as a pivot for wheel 48.

As usual, the pinion 47 is connected to the minute wheel 22.
b to rotate the member 22. Wheel 48a engages pinion 22c of member 22, while pinion 48b engages hour wheel 24b.

Hour hand wheel 2 provided at the end of the rotor shaft
rather than the portions 36 and 36' that engage with 0a;
It will be appreciated that a regular pinion can be used. Furthermore, rather than attaching the gear wheel 48 to an extension of the axial member 44, it is also possible to provide an additional spindle which is fixed relative to the stator 2. However, such a structure has the disadvantage that the number of machining operations for the stator increases.

The advantages of the motor module described above are obvious. The first advantage is that the assembly is a monoblock assembly and can be assembled in a factory. Other components of the watch, such as integrated circuits, batteries, crystal oscillators, etc., can be installed later. In other words, substantially all mechanical components are already integrated into the motor module.

Another advantage is that in an advantageous embodiment of the invention, the use of only one plate formed by the stator of the motor itself makes it possible to dispense with bridge member connections.

It is clear that this method of manufacturing a motor module can also be applied to watches without a seconds hand. In this case, two structures can be used. The first arrangement is to attach the minute hand directly to the spindle 18. In this case, it is necessary to change the gear ratio and motor rotation speed. In this case, the hour hand is attached to a gear wheel forming the member 22 supporting the minute hand (see FIG. 2b). In this case, as is clear, the gear 48 is omitted, and acting between the minute and hour spindles are the wheel 46, the spindle 44 and the pinion 47.
It is a gear formed by

The second structure includes member 18 and second hand wheel 2.
The solution is to omit 0a completely. In this case, of course, the transmission wheel 46 must be directly connected to the output side of the rotor. In this case as well, it is necessary to vary the rotational speed of the motor as well as the gear ratio between the output pinion of the motor and the transmission wheel 46.

The above-described variant embodiment also provides the same advantages as the first embodiment of the invention. In particular, in all cases at least one gear wheel having an axis passing through a single plate advantageously formed by the stator of the motor, and two gear wheels attached to this axis and arranged on both sides of the single plate. one wheel or pinion is provided.

As best shown in FIG. 5, stator 2 and coil core 6 are heated and sealed at bottom 10.
It is fixed at 4. Holes 120 and 1 are provided in the ends 2a and 4 of the stator and coil core, respectively.
22 are provided. A protrusion or bar 124 that is an integral part of the bottom 104 connects the hole 120.
and 122. The head 124a of the portion 124 is hot-deformed to form a connection between the stator 2 and the core 6 and on the other hand to secure the assembly to the case. In this case, lobe 4 of core 6
is supported on a support surface 126 at the bottom of the case. A similar arrangement is used to connect the stator end 2b and the lobe portion 4' of the coil core. More commonly, a stator (or a single plate)
The fixation of the extension is an integral part of the case.
This is done by engaging mounting holes in the stator (or a single plate). The free ends of these parts are then heated in order to deform them. As further shown in FIG. 2a, the coil 8 is arranged in a housing recess 130 in the casing bottom 104. In this way, the space in the dimension of the casing thickness can be reduced.

In an embodiment of the timepiece of the invention, the timepiece has a ring member 132 for displaying the date and a disc 134 for displaying the day of the week. The marks on the ring member 132 and the disc 134 can be seen through a window 136 provided in the dial 108.

The ring member 132 is attached to the peripheral portion 1 of the support plate 140.
40a (FIGS. 4 and 5), while the day disk 134 is rotatably mounted on the cylindrical wheel 24 (FIG. 2a). Disc 134 and ring member 1
32 is driven by a drive wheel 142 that engages the pinion 24c of the cylindrical wheel 24.
This drive wheel 142 will be described in detail later using FIG. 6.

3 and 4 show the time setting mechanism 200 shown in FIG. 1 in detail.

This setting mechanism 200 essentially consists of a mandrel 202
and at its end there is a pinion 204 (castle wheel) cooperating with an intervening gear 206.
wheel) is installed. This mechanism is engageable with a first toothed wheel 208, which is a date correcting wheel, and a second toothed wheel 208, which is a time correcting wheel.
can be engaged with the toothed wheel 210 of. This intervening gear 206 is supported by a pin 230 with a bearing. This pin 230 is displaceable as described below, but remains in a position parallel to the axes of wheels 208 and 210.

The stem 202 first has a crown 212 that allows the user of the watch to move and rotate the stem axially. Furthermore, this axle has a longitudinal guide 214 which cooperates with a guide groove 216 in the watch casing 102 to guide the axle 202 axially and into rotational movement. This guide part 2
14 is provided with a groove 220 for a seal 222. The mandrel further has three grooves 226a, 22
6b and 226c, these grooves cooperate with end 228a of detent spring 228 to define three axial positions of axle 202. In FIG. 3, end 228a of spring 228 is shown engaged with groove 226a to define the neutral position of the mandrel. Finally, the mandrel 202 has a pinion 204 at its end. Crown 212 and pinion 20
4 is advantageously formed at the same time as other machining operations on the mandrel 202.

The intervening gear 206 is rotatably attached to a pin 230 fixed to one end 232a of a lever 232--hereinafter referred to as a rocker lever. Advantageously, this pin 230 has the shape of pin 230' shown in FIG. The rocker lever 232 is rotatably mounted about a shaft 234 that is fixed to the support structure of the watch. The rocker lever 232 projects beyond the shaft 234 as an extension 236 forming a spring blade. End 236a of extension 236
abuts the wall 102 of the watch casing. In this way, the end 236a of the spring blade is attached to the mandrel 2.
It is at rest in the displacement direction of 02.

Finally, the mechanism 200 has a stop 240 which cooperates with a protrusion or short shaft 241 fixed to the support structure and attached to the rocker lever 232. This stopper, when the mandrel 202 is in the rest position, i.e. the position shown in FIG.
The gear 6 is positioned so as not to engage the pinion 4 and to apply some tension to the blade 236. It is clear that this mechanical abutment can be created by any suitable means.

When the mandrel 202 is fully pushed in (corresponding to the neutral position), this mandrel 202 engages the wheel 208
Or it can be rotated without acting on 210.
The shaft 202 has an end 228a of the spring 228 in the groove 2.
It is held in this position by engaging into 26a. The spring blade 236 holds the protrusion 2 of the rocker lever when the mandrel 202 is in this position.
41 is formed so as to be held against the abutting portion 240 by applying tension from the spring 236. Gear 206 engages first wheel 208 but not pinion 204 of mandrel 202 . Rotational movement of the mandrel therefore produces no effect.

When the user wishes to correct the date, the user moves this stem 202 half way out. Gear 206 does not move and thus remains engaged with wheel 208. The amount of displacement of the mandrel is selected such that pinion 204 engages gear 206. The lever 232 does not move and is held in that position by the blade 236 which presses the protrusion 241 against the stop 240. The core is the groove 226b
It is held in that position by the end 228a of the spring 228 that engages the spring 228. When the user rotates the mandrel, the rotational movement of pinion 204 causes rotational movement of gear 206, which causes wheel 208 to rotate, thereby allowing the date to be corrected. This is because the wheel 208 is engaged with the date ring member 132 via the gear 209.

In the position where the mandrel is fully pulled out,
This mandrel can drive the wheel 210. When the mandrel moves from the first working position to the second working position, the translational movement of the mandrel 202 causes the rocker lever 232 to rotate its axis by the action of the pinion 204 on the gear 206 or by the pinion 204 acting directly on the rocker lever 232. 234
It rotates around the center. When this movement occurs, gear 206 disengages wheel 208 and engages wheel 210. The mandrel is held in this position by the end 228a of the spring 228 that engages in the groove 226c. In this position the user
02 to rotate the time adjustment wheel 210. The displacement value of the rotational movement of the rocker lever is selected such that the gear 206 engages the pinion 204 in the second and third positions of the axle.

As shown in FIGS. 1 and 4, wheel 210 is engaged with wheel 250, which in turn is engaged with gear 48. As shown in FIGS. When the stem is in the fully extended position, the stem 202 can be used to change the hours and minutes. The wheels 210 and 250 are preferably rotatably mounted on spindles formed by protrusions or short shafts 252 and 254 that are an integral part of the bottom 104 of the casing. A hole 258 in the stator 2 passes through the base 256 of the protrusion 254 . In this way, the protrusion 2
54 assists in fixing the stator 2 in place.
Furthermore, wheels 210 and 250 are held in place by support plate 140.

As shown next in FIG. 5, a battery 260 for powering the watch is housed within a chamber 262 provided in a thickened section 264 of the watch casing. This thickened portion 264 extends into the overhang 102a. Chamber 262 is closed by battery retaining cover 266. The battery is held between the upper wall surface 262a of the chamber 262 and the cover 266. Therefore, replacing the battery does not involve any disassembly work. As further shown in FIG. 5, drive wheel 142 is rotatably mounted about a protrusion or short axis 268 that is an integral part of wall 262a. Furthermore, as shown in FIG. 5, the upper part of the battery 260 is located at a height above the height of the stator 2. In this way, the thickness of the casing can be significantly reduced. Furthermore, the chamber 262 has a so-called localizing effect on the battery. This is because this chamber 262 only provides a passage for passing the electrical connection strap member.

FIG. 6 is a plan view of an embodiment of a wheel 142 for operating a date display. This wheel 1
42 is made of, for example, a copper-beryllium alloy. This wheel 142 has teeth 142 on its periphery that engage the pinion 204c of the cylindrical wheel.
It has a. Furthermore, this wheel 142 is
Two openings 150 defining two curved arms 154 and 156 that are an integral part of the wheel.
and 152. Each arm terminates in an enlarged projection 158 and 160, respectively.
These enlarged projections 158 and 160 are bent so that they extend perpendicular to the plane of the wheel. This folding is indicated by dashed regions 158' and 168'. Projection part 1
58 and 160, on the one hand, ring member 132;
and teeth 134 formed on the bottom surface of the disk 134 on the other hand.
can be engaged with a. For example, these teeth can be cut out from the disk 134 and bent.
can be formed.

The date drive wheel is shown in Figure 2a driving the date ring and day of the week disc. First, the rotation of the motor is on spindle 2.
0, is transmitted to the date drive wheel 142 via the gear 46, pinion 48, etc., so that the date drive wheel is rotated. As shown, the upper right protrusion of this date drive wheel 142 engages one tooth 134a on the inner surface of the day of the week disc. The left protrusion on this date drive wheel, on the other hand, engages a tooth 132a provided in the inner line of the date display ring 132. When the date drive wheel 142 is rotated, its protrusion, through the teeth 134a and internal teeth 132a, rotates the day of the week disc 134 and the date ring, bringing the day of the week and date into position. Next, the protrusion of the drive wheel 142 is disengaged from the teeth 134a and 132a, and
The day of the week and date will remain in place.

When the user of the watch changes the date using the stem 202, the elastic arms 156 and 154 cause the protrusions 158 and 160 to
The engagement can be released from the second tooth 132a.
This release action is formed by an elastic deformation in the direction of curvature of the arm portion 156 or 154 for a given direction of rotation.

This method of manufacturing the drive wheel 142 is significantly advantageous because it only requires cutting and bending the sheet metal forming the wheel. However, the elasticity produced in the arm portion is sufficient to ensure proper operation of the mechanism.

Up to this point, the explanation has been mainly related to the mechanical components of the watch. Next, according to Figure 7,
An electronic circuit for controlling a watch motor will be explained. As is well known, electronic circuits are essentially
It is composed of a crystal oscillator 300 that forms a time base, an integrated circuit 302, and a track that is a conductive member. The crystal oscillator is housed in a cylindrical casing, and the crystal oscillator 300 is further provided with terminals 300a and 300b. Integrated circuit 302 is crystal oscillator 3
Processes the pulses supplied from 00. The conductive tracks also connect the circuit components to each other and to the battery 260 and the motor coil 8. In a preferred embodiment of the invention, these conductive tracks are preformed or etched and are fixed to the upper side 104a of the casing. This casing is made of an insulating material and serves as an insulating substrate for the printed circuit. In FIGS. 2a and 4, these conductive tracks are designated by the reference numeral 304.

More specifically, the conductive tracks connect the crystal oscillator terminals 300a and 300b to the integrated circuit terminals 302a and 302b.
6 and 306', tracks 308 and 308' connecting integrated circuit terminals 302c and 302d to the motor coils, track 310 connecting the negative terminal of battery 260 to integrated circuit terminal 302c, and track 310 connecting the negative terminal of battery 260 to integrated circuit terminal 302c; A track 312 connects a terminal 302f of the integrated circuit to a terminal 302f of the integrated circuit, and a track 314 connects a terminal 302g of the integrated circuit to a zero reset input. In reality, the tracks are not necessarily all on the same plane. The end 310a of the track 310 is bent. The end 310a of this track is shown in the drawing as a dashed line 310' before being folded. As is clear from FIG. 5, the end portion 310a
are the upper electrode 260a and the upper wall surface 26 of the battery 260.
It is sandwiched between 2a. Similarly, truck 30
The ends of 8 and 308' are bent and brazed to integrated circuit terminals 302c and 302d. These parts are shown in broken lines before being folded. Additionally, track 314
is a dashed line 3 with a curved end 314a to form a flexible electrical contact blade.
The area designated 14' represents the end of this track before it is folded.

Track 312 is more complex in shape. The ends 312a of this track are bent to form positive working contact with the sides of the battery 260. The portion indicated by dashed line 312'a shows this end before being folded. Further track 3
12 has four elastic tongue-like parts 312b,
These tongues are bent to form a crystal oscillator 30.
It has the effect of fixing the casing of 0. Broken line 3
The portion indicated by 12' shows the tongue portion 312b before being bent. Finally, each track has at least one hole, all designated by the reference numeral 316.

An advantageous embodiment of the assembly of the electronic circuit into the bottom part 104 of the casing will now be described. First of all, all the tracks 308-314 are formed from a copper plate, for example 0.15 mm thick, and then a bridge 318 is provided which mechanically interconnects the various tracks.
Some of these bridges 318 are shown shaded in FIG. The above-mentioned bending operations are carried out during the assembly of tracks constituting a single component. Next, the terminal 302a of the integrated circuit
~302 g is fixed by brazing or gluing to the end of the corresponding track, and the crystal oscillator 30
0 aligned within the fixed protrusion 312b and the crystal oscillator terminals 300a and 3
00b to the end of the associated track by brazing or gluing. When these terminals are secured, these two parts themselves form a mechanical connection between the conductive tracks. Next, the bridge part 31
8 can be cut and removed. However, a mechanical connection is maintained between the tracks. After this operation, the device is placed on the upper side 104a of the bottom of the casing. In this case, the minor shaft, which is an integral projection of the bottom of the casing made of thermoplastic plastic material, is engaged in a hole 316 provided in the conductive track. In order to secure the electronic circuit assembly to the bottom of the case with a heat seal, the head of the protrusion is heated and deformed.

It will be clear at the outset that this embodiment of the printed circuit reduces the cost of conventional insulating substrates. It is then clear that this method of manufacturing printed circuit assemblies is eminently suitable for mass production, taking into account the nature of the steps involved and the fact that the conductive track elements are permanently mechanically connected to each other. . Furthermore, this method of operation is particularly suitable if the insulating substrate is formed by the bottom of the casing. This is because there is no work to be done on the electronic circuit after it is fixed in place. Such an operation would be particularly difficult under these conditions. Finally, this manufacturing method allows for the construction of a unitary assembly that already has all the electrical connection elements, including the battery connection straps or arms.

As is clear from all the foregoing descriptions, the unique arrangement of the watch according to the invention allows for a very reasonable total thickness (including the glass) of the watch, e.g. Even if the thickness between the inner surface of the dial and the dial is 4.5mm,
It is clear that the components of the watch can be spaced sufficiently apart from each other.

Furthermore, since the watch actually has a motor module and an electronic module, each of which forms one unit, the final assembly of the watch is considerably simplified and difficult working steps are no longer required. .

Furthermore, the elimination of expensive parts such as bridge members and bearings for the moving mechanism, or also parts that are difficult to machine, such as sliding pinions, not only simplifies the assembly process but also improves the reliability of the watch. Manufacturing costs can be significantly reduced without sacrificing accuracy.

Finally, it is clear that it is also possible to manufacture a timepiece of the type described above without a date display or a day of the week display, without departing from the scope of the invention. It is also clear that it would not depart from the scope of the invention if, instead of the electronic circuit described above, a conventional printed circuit with an insulating substrate was used, and the substrate was fixed to the bottom of the casing, for example with adhesive.

Effects of the Invention The present invention provides a wristwatch that is easy to mechanically process, easy to assemble, and has a reduced thickness.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of the watch with the dial and glass plate removed to clearly show the positional relationships of various parts; Fig. 2a is a sectional view taken along the line - in Fig. 1; Figure 2b is a detailed partial view of Figure 2a showing the motor module, Figure 3 is a partial plan view of the watch showing the correcting mechanism of the watch, and Figure 4 is a view taken along the line - of Figure 1. A sectional view showing the arrangement of the correction mechanism in FIG. 3, and FIG. 5 taken along the line -
6 shows a plan view of a preferred embodiment of the drive wheel, and FIG. 7 shows a preferred embodiment of the printed circuit of the watch. FIG. 3 is a plan view of the embodiment. 102... Monochrome case, 108... Dial plate, 110... Glass plate, 112,222...
Seal, 2... Stator, 4... Lobe, 6... Coil core, 8... Coil, 10, 14... Hole, 1
2...Notch, 16, 22a, 24a...Pipe, 18
...Second hand spindle, 20...Second hand gear, 20a
...Second hand wheel, 20b...Second hand pinion, 2
2b...Minute wheel, 22c...Minute pinion, 24...Cylindrical wheel, 24b...Hour hand wheel, 24c...Hour hand pinion, 26a...Cup-shaped member, 26b, 42a...Flange, 28...
...Bearing, 30...Plate, 30a, 40, 42b, 1
20, 122, 258, 316... hole, 32...
Rotor, 34...Axis, 35...Magnet, 34'...Pivot, 36, 36'...Spline portion, 32
...Motor rotor, 42...Sleeve, 44...
Spindle, 106...Side wall, 136...Window, 1
42... Drive wheel, 104... Bottom of case, 132... Ring member, 134... Disc, 140... Support plate, 150, 152...
...Opening, 158, 160...Enlarged protrusion, 202
...Mandrel, 47, 48b, 204...Pinion,
22, 48, 206, 209...gear, 46, 1
42,208,48a,210,250...Wheel, 222,226...Groove, 228...Detent spring, 232,230...Rotzker lever, 2
34... shaft, 236... spring blade, 240...
...Stopper, 241...Short axis, 254...Protrusion, 252, 254, 268...Short axis, 230...
...Pin, 260...Battery, 262...Chamber, 266
...Cover, 300...Crystal oscillator, 302...
integrated circuit, 304, 306, 308, 310, 3
12,313,314...Truck, 318...
Bridge.

Claims (1)

[Claims] 1. An analog display type electronic timepiece, which includes: - a motor having a coil 8, a stator 2, and a rotor 32; - pointer spindles 18, 22, 22a; ,24,2
4a are provided, - the pointer spindles 18, 22, 22a, 24,
A pointer supported by 24a is provided, - a rotor 32 and a pointer spindle 18, 22, 22;
a, 24, 24a, and a gear mechanism 20,
46, 47, 48 are provided; - an electronic circuit is provided, the electronic circuit comprising the integrated circuit 302, the crystal oscillator 300, and a conductive member electrically connecting the integrated circuit 302 to the crystal oscillator 300 and the motor; 306, 306', 308,
308', 310, 312, 314; - a support structure is provided on which the rotor, pointer spindle 18, 22, 2;
2a, 24, 24a and gear mechanism 20, 4
6, 47, 48 are positioned and supported; - a battery 260 is provided for powering the motor and the electronic circuit; the electronic timepiece is a wristwatch; bottom 1
04 and a glass 11 forming with it a sealed hollow chamber.
0, and a fixing member 12 integrally formed with the bottom part.
4, in which case the support structure and the electronic circuit are incorporated into the interior of the hollow chamber independently of each other and assembled together on the casing using the fixing member, and the stator is An analog display electronic timepiece fixed to the bottom of a casing, at least a coil permanently fixed to the casing via a stator, and a battery fixed to the bottom. 2. The analog display electronic timepiece according to claim 1, wherein the support structure is also permanently fixed to the bottom of the casing. 3 Motor stator 2 and rotor 3 at the same time
2 and as a support for the spindle 18, 22, 22a, 24, 24a for the pointer and for the gear mechanism 20, 46, 47, 48. The analog display type electronic watch described in paragraph 1. 4. The analog display electronic timepiece according to claim 1 or 2, wherein the casing 102 is a monochrome body and includes a bottom portion 104 and a side wall 106. 5. The casing 102 is formed of an insulating material, and the conductive member is connected to the bottom 104 of the casing 102.
4. The analog display electronic timepiece of claim 3, further comprising an integrated circuit 302 and an oscillator 300 attached to an end of the conductive member. 6 the insulating material is thermoplastic and the casing bottom 104 includes overhangs 102a, 102b forming an integral part with the casing 102;
Overhangs 102a, 10 are provided to provide conductive members and stators with mounting holes 316, and for mounting support structures and electronic circuits.
5. The analog display type electronic timepiece according to claim 1, wherein 2b is thermally deformed by being engaged with the hole. 7. The analog display type electronic timepiece according to claim 5, wherein at least one end of the conductive members 310, 312 is bent to form a connecting strap member 302e, 302f for the battery 260. 8. The bottom 104 of the casing 102 includes a thickened region 264 in which a housing 262 is provided with an opening facing towards the outside of the watch and a top wall 262a, which opening is connected to the closure member 2.
66, and the battery 260 is disposed within the housing 262 and held between the upper wall 262a of the housing 262 and the closing member 266. or an analog display type electronic watch as described in paragraph 6. 9. The analog display type electronic timepiece according to claim 7, wherein a portion of the battery 260 is arranged at a level higher than the height level of the stator 2. 10 An analog display type electronic timepiece, which is equipped with: - a motor having a coil 8, a stator 2, and a rotor 32; - pointer spindles 18, 22, 22a, 24, 2;
4a are provided, - the pointer spindles 18, 22, 22a, 24,
a pointer supported by 24a is provided; - the rotor 32 is connected to the pointer spindle 18, 22, 22;
Gear mechanism 20, 4 coupled to a, 24, 24a
6, 47, 48 are provided; - an electronic circuit is provided that includes the integrated circuit 302, the crystal oscillator 300, and a conductive member 306 electrically connecting the integrated circuit 302 to the crystal oscillator 300 and the motor; ,306',308,
308', 310, 312, 314; - a support structure is provided on which the rotor, pointer spindle 18, 22, 2;
2a, 24, 24a and gear mechanism 20, 4
6, 47, 48 are positioned and supported; - a battery 260 is provided for powering the motor and the electronic circuit; the electronic timepiece is a wristwatch;
4 and a glass 110 forming a sealed cavity with the casing.
and a fixing member 124 integrally formed with the bottom portion.
The support structure and the electronic circuit are independently incorporated into the hollow chamber and assembled together in the casing using the fixing member, and a stator is fixed to the bottom of the casing. at least the coil 8 is permanently fixed to the casing via a stator, the battery is fixed to the bottom, and the watch further comprises: - a dial 108 and a ring member 13 for displaying the date;
2 and a disk 134 for displaying the day of the week,
The ring member and the disc are the stator 2 and the dial plate 1.
08, and the wristwatch further includes a wheel 142 that drives a date display ring member 132 and a day of the week display disc 134.
The wheel 142 includes a peripheral tooth row 142.
a and two openings 150, 152 which do not reach the teeth 142a in the periphery thereof, each of which cuts out an elastic arm 154, 156 forming an integral part of the wheel 142. Analog display electronic clock. 11 the stator 2 of the motor as a support simultaneously for the rotor 32 and for the spindles 18, 22, 22a, 24, 24a for the pointer and for the gear mechanism 20, 46, 47, 48; An analog display electronic timepiece according to claim 10, which is used as a support.