JPH0527024Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a structure for holding a spring member in a timepiece.

[Prior art and its problems] Generally, the analog movement of a pointer-type electronic watch transmits the rotation of a step motor to a gear train mechanism.
The time is indicated and displayed by moving the hour and minute hands attached to the pointer shaft of this gear train mechanism, and the hands are adjusted by a time adjustment mechanism. mechanism,
Various parts such as the time adjustment mechanism are assembled to the base plate, which is the main plate.

However, the conventional base plate is made of metal, and the wall against which the spring part of the time adjustment mechanism, etc., is provided is only vertical, and the spring part easily comes off.

[Purpose of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to create a watch that has a simple structure and can be held securely and well without the spring member coming off. An object of the present invention is to provide a holding structure for a spring member.

[Main points of the invention] In order to achieve the above-mentioned purpose, this invention forms the cannula in a shape that extends downward from the winding stem engagement part and then extends along the surface of the main plate. A spring part is formed in the bent extension part, and the spring part mounting surface where the spring part of the cannula is arranged on the periphery of the main plate is one step lower than the surface on the center side of the watch.
The side wall of the spring part mounting surface on the watch center side is formed into a convex arc shape, and a horizontal protrusion part that protrudes in the horizontal direction is formed in a part of the spring part. It is designed to be locked between the arcuate side wall and the horizontal protrusion.

[Embodiment] An embodiment in which this invention is applied to an analog movement of an electronic wristwatch will be described below with reference to FIGS. 1 to 3.

Configuration Figures 1 and 2 show the overall configuration of the analog movement. This analog movement transmits the rotation of the step motor 1 to the gear train mechanism 2, which moves the hour hand, minute hand, second hand, etc. to display the time, and the time adjustment mechanism 3 which controls the hands of the hands. Each of these parts is attached to the main plate 4 as shown in Figure 1A and B.
It can be attached to the front and back sides of the

The step motor 1 is a drive source for moving the hands, and as shown in FIG.
Consisting of stator 1b, rotor 1c, etc., coil 1
The rotor 1c rotates in steps of 180 degrees each time an inversion pulse of a fixed period is applied to the rotor a, and is attached to the back side of the base plate 4 as described later. In this case, the coil 1a is provided with mounting plates _{1a 1} , 1a ₁ at both ends thereof, and screw insertion holes 1a ₂ , 1a ₂ are provided in the mounting plates 1a 1 , 1a ₁ . The stator 1b is a flat plate made of magnetic material, and has a circular hole 1b ₁ in the center of which the rotor 1c is placed, and screw insertion holes 1b ₂ at both ends and at predetermined locations. . In addition, the rotor 1c has a rotor shaft 1c ₁ , a magnet fixing part 1c ₂ , a rotor pinion 1c ₃ , and a "+"-shaped locking part 1c _{4 .} . . integrally formed with synthetic resin. is equipped with a magnetic ring.

The wheel train mechanism 2 transmits the rotation of the step motor 1 to the pointer to move the pointer, and includes an intermediate wheel 5, a fourth wheel 6, a third wheel 7, a second wheel 8, a hino wheel 9, The rotation of the rotor 1c of the step motor 1 is transmitted via the intermediate wheel 5 to the fourth wheel & pinion 6, which moves the second hand, and the rotation is transmitted via the third wheel & pinion 7. This rotation is transmitted to the center wheel 8, which moves the minute hand, and its rotation is transmitted via the hour wheel 9 to the hour wheel 10, which moves the hour hand. It is designed to indicate the time. Of these gears, the intermediate wheel 5, the fourth wheel & pinion 6,
The third wheel & pinion 7 is attached to the back side of the main plate 4 by a gear train bridge 11 described later, and the second wheel & pinion 8, the rear wheel 9, and the hour wheel 10 are attached to the main plate 4 by the rear presser 12 (described later).
attached to the surface side. In this case, the center wheel 8 has a cylindrical shaft portion 8b that integrally has a cylindrical pinion 8a.
and the gear part 8c are integrally formed to be slip rotatable, and when the time is adjusted, the shaft part 8b and the gear part 8c
The rotation is prevented from being transmitted to the fourth wheel & pinion 6 and the rotor 1c. In addition, the intermediate wheel 5, the fourth wheel 6, the third wheel 7, the second wheel 8,
The hour wheel 9 and the hour wheel 10 are all made of synthetic resin.

The time adjustment mechanism 3 adjusts the hands of the hands, and includes a winding stem 14, a dial wheel 15, a small iron wheel 16,
17 mandarin ducks, 18 cannuck dogs, 1 stop lever
When the winding stem 14 is rotated in this state, when the winding stem 14 is rotated, the rotation is transferred to the wheel through the winding stem 15 and the small iron wheel 16. The signal is transmitted to the hour wheel 9 of the train mechanism 2 to adjust the hands, and these are also attached to the main plate 4, as will be described later. In this case, Tsuzumi car 1
5 is made of synthetic resin and is slidably attached to the rectangular spline portion 14a of the winding stem 14, and has an annular recess 15a formed on its outer periphery. Further, the mandarin duck 17 rotates in response to the pulling out operation of the winding stem 14 and restricts the winding stem 14 to a predetermined position.A mounting hole 17a is provided at a predetermined location of the mandrel 17, and its tip 17b is attached to the winding stem 14. It is arranged in the stepped recess 14b. The cannula 18 is made of conductive metal, and is used to removably engage the tension wheel 15 with the small iron wheel 16 in response to the pull-out operation of the winding stem 14, and has a mounting hole 18a and a locking hole 18b at one end and in the middle thereof. is provided, and the protruding portion 18c is located in the recess 1 of the Tsuzumi wheel 15.
A contact 18d serving as a movable contact of the reset mechanism is provided at the tip of the contact 18d, and a spring portion 18e is bent and extended into a "U" shape. Furthermore, stop lever 1
9 is the rotor 1c of the step motor 1 when adjusting the time.
A mounting hole 19a is provided at one end, and a mounting hole 19a is provided at the tip of the mounting hole _19a . A stopper portion 19b that is removably engaged is provided. In addition, there is a locking hole 1 for the cannula 18 in the middle of the stop lever 19.
A locking portion 19c that fits into and moves integrally with 8b is formed by bending.

The base plate 4 is a main plate made of synthetic resin,
As shown in FIG. 1A, in the center of the front side there is a center wheel storage section 4a that stores the center wheel 8, and in the vicinity thereof there is a Hinoura wheel storage section 4b that stores the Hinoura wheel 9.
However, Hino back presser storage sections 4c for storing the Hino back presser 12 are provided around these, and mounting holes 4d for inserting and attaching the supports 20a to 20f are provided at predetermined locations on the front and back sides. It is installed through the. In this case, a cylindrical bearing portion 4a ₁ is provided at the center of the center wheel storage portion 4a, and the center wheel & pinion 8 is rotatably attached to this bearing portion 4a ₁ . The shaft portion 8b of
An hour wheel 10 is rotatably attached to the wheel. In addition, support shafts 4b ₁ and 4b ₂ are provided in the Hinoura car storage section 4b, and the Hinoura car 9 is mounted on the support shaft 4b ₁ .
Small iron wheels 16 are each rotatably attached to the support shaft _4b2 . Furthermore, the Hino back presser storage portion 4c includes positioning protrusions 4c ₁ and 4c ₁ and a pin 23.
A pin insertion hole _4c2 into which the pin is inserted is provided respectively. The Hino back presser 12 stored in the Hino back presser storage section 4c is for holding down the Hino back wheel 9, and is made of a metal plate such as stainless steel, and has a presser part 12a and a screw insertion hole 12b at predetermined locations. , a positioning hole 12c and a pin insertion hole 12d are provided, and positioning holes 12b, 12 are provided in the positioning projections 4c ₁ , 4c _1.
By fitting b, the Hino back presser storage section 4c
By being positioned inside and tightened with countersunk screws 21, 21, the presser part 12a is held in place by the Hinouraguruma 9.
It's starting to press down on people. In addition, the pillar 20
a to 20f each have a cylindrical shape, and a countersunk screw 21 and later-described machine screws 22a to 22 are installed inside the cylindrical shape.
A female thread is formed into which f is screwed.

On the other hand, on the back side of the main plate 4, as shown in FIG. , 4h, 4i are provided, and on the left side there is a winding stem storage part 4j for the time adjustment mechanism 3, a tension wheel storage part 4k, a positioning part 41 for positioning the spring part 18b of the cannula 18, and a tip 19a of the stop lever 19. In addition to providing guide grooves 4m for guiding the battery, a battery storage portion 4n is provided on the back side (upper side in the figure).
Each storage section will be explained in turn below.

The mounting part 4f of the step motor 1 consists of a recess _4f1 for storing the coil 1a and a cylindrical part _4f2 for _positioning the stator _1b . 1b is positioned, and the coil 1a is placed on top of the stator 1b. In this state, the flat machine screws 22a, 22b are passed through the screw insertion holes 1a ₂ , 1a ₂ and 1b ₂ , 1b ₂ from above the coil 1a into the base plate 4. It is inserted into the mounting holes 4d, 4d, and screwed onto the internal supports 20a, 20b. As a result, the coil 1a and the stator 1
b is attached to the base plate 4. At this time, the mounting plate 1a ₁ on one side of the coil 1a (the front side in Fig. 1B)
The circuit board 24 is fastened to the mounting plate _1a1 , and the battery holding plate 25 is fastened to the other mounting plate 1a1. in this case,
The circuit board 24 has screw insertion holes 24a at predetermined locations.
... are provided, and coil springs (not shown) that serve as fixed contacts of the reset mechanism are soldered to the electrode portions at predetermined locations.

Among the bearing holes 4g, 4h, and 4i, the bearing hole 4g is a portion into which the shaft of the intermediate wheel 5 is rotatably inserted,
It is located inside one of the recesses 1b ₃ and 1b ₃ provided on the outer periphery of the stator 1b of the step motor 1. The bearing hole 4h is a portion through which the shaft of the fourth wheel & pinion 6 is inserted, and is located at the center of the main plate 4, and corresponds to the cylindrical bearing portion _4a1 that rotatably supports the aforementioned second wheel & pinion 8. . Further, the bearing hole 4i is a portion through which the shaft is inserted into the third wheel & pinion 7, and
The pinion 7a of the third wheel 7 protrudes into the storage portion 4a, and the center wheel 8 is located near the storage portion 4a.
It meshes with the gear part 8c. In this case, the wheels 5, 6, which are attached to the bearing holes 4g, 4h, 4i,
The other end of each shaft 7 is rotatably supported by a train wheel bridge 11. This gear train bridge 11 is made of synthetic resin, and has a square plate shape as shown in FIG. 1B.
Bearing holes 11a are provided at predetermined locations, and mounting portions 11b, 11b are provided at both ends. The mounting portions 11b, 11b have a cylindrical shape and protrude, and flat machine screws 22c, 22 are provided at the center of the mounting portions 11b, 11b.
Screw insertion holes 11c, 11c are formed into which screws d are inserted, and these screw insertion holes 11c, 11c correspond to the mounting holes 4d, 4d of the base plate 4, and the mounting portions 11b, 11b are formed around the mounting holes 4d, 4d. The tips are in direct contact and can be tightened with flat machine screws 22c and 22d. In this case, mounting part 1
The upper part of one side of 1b is lowered by one level, and an electrode plate 26 for the positive electrode and a part of the circuit board 24 are placed in this lower part, and the electrode plate 26 and the circuit board 24 are flat and small. It is tightened together with the train wheel bridge 11 by a screw 22d.

Among the storage sections of the time adjustment mechanism 3, the winding stem storage section 4j that stores the winding stem 14 is a semicircular groove provided from the left side of the main plate 4 toward the center, and the winding stem 14 is placed inside the winding stem storage section 4j. It is arranged to be slidable and rotatable. The Tsuzumi wheel storage section 4k that stores the Tsuzumi wheel 15 is located in the middle of the winding stem storage section 4j, and is an opening penetrating the front and back sides of the main plate 4, into which the Tsuzumi wheel 15 attached to the winding stem 14 can slide. It is now being placed in The mandarin duck 17 is rotatably attached to a pin 23 that is inserted from the front side of the main plate 4 and protrudes to the back side.The cannula 18 and step lever 19 are sequentially fitted into the cylindrical part of the mounting hole 4d, and the mandarin duck holder is inserted from above. 27 and is tightened with a flat machine screw 22e. In this case, the stop lever 19
Cannuki 18 is placed on top of the stop lever 1.
9 is inserted into the locking hole 18b of the cannula 18. The mandarin duck holder 27 is made of conductive metal, and is mounted on the cannula 18 with a flat machine screw 22e.
At the same time, the hole 27a on the tip side fits into the pin 23 from above the mandarin duck 17 to hold down the mandarin duck 17. Further, as shown in FIG. 2A, the tip 19a of the stop lever 19 approaches the locking portion _1c4 of the rotor 1c through the guide groove 4m of the base plate 4. In addition, Kannuki 1
The contactor 18d of No. 8 is close to the coil spring of the circuit board 24, and the spring part 18e is arranged at a lower part of the main plate 4, and is attached to the holding part 41 provided on the wall 41 ₁ of this lower part. The tip side is locked. As shown in FIG. 3A, this holding part 41 has 1
A protrusion 41 2 is provided that protrudes laterally from the upper part of the wall 41 ₁ of the lower step part, and the spring part _{18e of the cannula 18 is locked at the undercut part 41 3 between the protrusion 41 2 and} the bottom. It's getting old. When molding such a holding part 41, as shown in FIG. 3B, a recess 28a ₁ corresponding to the protrusion 41 ₂ is formed in the upper mold 28a, and a recess 28a 1 corresponding to the projection 41 2 is formed in the lower mold _28b . A protrusion _28b1 is provided that bites into the corresponding location, so that the holding part 4 can be formed at the same time as the base plate 4.
1 is formed.

The battery storage section 4n is for storing batteries,
At its periphery, there are electrode plates 26 for positive and negative electrodes,
29 and a battery holding plate 25 are attached. The electrode plate 26 for the positive electrode is attached to the mounting part 1 of the gear train bridge 11.
It is mounted on the circuit board 1b with a flat machine screw 22d together with the circuit board 24, and is connected by contacting the electrode portion of the circuit board 24. One end of the electrode plate 26 is bent downward into a "V" shape to form an elastic contact portion 26a.
The elastic contact part 26a is vertically inserted into the battery storage part 4n from above, and the upper part of the inserted elastic contact part 26a comes into elastic contact with the upper side of the side surface (positive electrode) of the battery, causing the battery to close. It is held so that it does not slip out of the battery storage section 4n. Further, the other end 26b of this electrode plate 26 extends to the attachment pin 23 of the mandarin duck 17, and the pin 23 is fitted into the fitting hole 26c, and is electrically connected to the contact 18b of the mandarin duck 18 via the mandarin duck holder 27. There is. On the other hand, the negative electrode plate 29 is connected to the circuit board 24 by being attached to the cylindrical part of the mounting hole 4d of the main plate 4 with the flat machine screw 22f, and one end thereof is inserted into the battery storage part 4n. , this inserted part is designed to come into contact with the bottom surface (negative electrode) of the battery.
The battery holding plate 25 holds the battery in the battery housing 4n, and is attached to the mounting plate _1a1 of the coil 1a of the step motor 1, as described above.

Operation Next, the operation of the analog movement configured as described above will be explained.

Normally, the step motor 1 rotates, and this rotation is transmitted to the hands via the wheel train mechanism 2, which causes the hands to move and indicate the time. That is, when the rotor 1c of the step motor 1 rotates, the rotation is transmitted to the fourth wheel & pinion 6 via the intermediate wheel 5, and the fourth wheel & pinion 6 moves the second hand. Further, when the fourth wheel & pinion 6 rotates, the rotation is transmitted to the center wheel & pinion 8 via the third wheel & pinion 7, and the center wheel & pinion 8 moves the minute hand.
Further, when the center wheel 8 rotates, the rotation is transmitted to the hour wheel 10 via the hour wheel 9, and the hour wheel 1
Move the hour hand at 0. As a result, the time is indicated and displayed.

Further, when adjusting the hands such as when adjusting the time, the winding stem 14 of the time adjustment mechanism 3 may be operated. That is, when the winding stem 14 is pulled out by a predetermined amount, the mandrel 17 rotates to set the winding stem 14 at a predetermined position, and as the mandrel 17 rotates, the cannula 18 and the stop lever 19 rotate. Then, the protruding part 18 of the cannula 18
c slides the knob wheel 15 into engagement with the small iron wheel 16, making it possible to adjust the time, and the contact 18d which forms the movable contact of the reset mechanism.
comes into contact with a coil spring forming a fixed contact attached to the circuit board 24, causing the coil spring to bend, or
It bites into the coil spring and becomes conductive, thereby resetting the step motor 1. Further, the stop lever 19 rotates together with the canopy 18, and a stopper portion 19a at its tip engages with a locking portion _1c4 of the rotor 1c of the step motor 1, thereby stopping the rotation of the rotor 1c. In this case, the stopper portion 19a moves in the normal direction of the rotor 1c (direction perpendicular to the tangent to the rotor 1c) and engages with it, so that the rotation of the rotor 1c is reliably and satisfactorily stopped. In this state, when the winding stem 14 is rotated, the rotation is transmitted to the hinoura wheel 9 of the wheel train mechanism 2 via the tsuzumi wheel 15 and the small iron wheel 16.
The hour hand 10 and the pinion pinion 8a of the center wheel 8 are rotated to move the hour and minute hands to adjust the hands. In this case, the second wheel & pinion 8 slips and rotates between the shaft portion 8b having the cylindrical pinion 8a and the gear portion 8c, so the rotation is not transmitted to the fourth wheel & pinion 6, and the second hand does not move. . Incidentally, after adjusting the needles, the winding stem 14 may be pushed back to its original state. Then, as shown in FIG.
The contact 18d is separated from the coil spring of the circuit board 24 and applies a driving signal to the step motor 1 again. Furthermore, the stop lever 19 has a stopper portion 19b at its tip that is connected to the rotor 1c of the step motor 1.
Since the second hand disengages from the locking portion _1c4 in the normal direction, the rotor 1c does not rotate at the time of disengagement, and the second hand disengages very well and can reliably prevent the second hand from jumping.

However, according to the analog movement described above, the holding part 41 having the undercut part 41 3 between the protruding part 41 ₂ and the bottom surface one step lower is integrally formed on the main plate 4 made of synthetic resin, and this holding part 41 is formed integrally with the base plate ₄ made of synthetic resin. Part 4
Since the spring part 18e of the cannula 18 is locked to the undercut part ₄₁₃ of the cannula 1, no matter how the cannula 18 moves, it will not come off, and the spring part 18e can be held securely and well, making it reliable. You can increase your sexuality. In particular, since the holding part 41 is integrally formed with the base plate 4 made of synthetic resin,
It can be installed extremely easily and satisfactorily without increasing the number of parts and assembly steps.

In addition, although the above-mentioned embodiment explained the case where the spring part 18e of the cannonball 18 of the time adjustment mechanism 3 is held by the holding part 41, this invention is not limited to this, and the spring part of other parts can also be held. It's okay.

Further, although the above-mentioned embodiment has been described in the case where it is applied to an electronic wristwatch, this invention is not limited to this, and can be widely applied to other pointer type watches.

[Effects of the invention] As explained in detail above, according to the holding structure of the spring member in the watch related to this invention, the spring part mounting surface is lowered, so the horizontal direction of the spring part is restricted by the spring mounting. Since it can be carried out on the side wall of the surface, there is no need to form the holding part in an L-shape, making it strong and durable.Also, since the side wall of the spring mounting surface is formed in a convex arc shape, the spring part and the side wall can be The spring part can easily move along the side wall with low friction, allowing for smooth deformation of the spring part, and the spring mounting surface is open on one side, making it easy to install and lock the spring part. is obtained.

[Brief explanation of the drawing]

Figures 1 to 3 show an example in which this invention is applied to an analog movement of an electronic wristwatch. Figure 1A is an exploded perspective view of the main plate viewed from above, and Figure 1B is an exploded perspective view of the main plate. Figure 2A is a bottom view of the normal state, Figure 2B is a bottom view of the time adjustment state, and Figure 3A is a diagram of the positioning part that locks the spring part of the cannula. FIG. 3B is a cross-sectional view showing a state of molding by a molding die. 1... Step motor, 2... Wheel train mechanism, 3...
...Time adjustment mechanism, 4...Main plate, 41...Holding section,
41 ₂ ...Protrusion part, 41 ₃ ...Undercut part,
18...Kanuki, 18e...Spring part.

Claims (1)

[Scope of Claim for Utility Model Registration] A main plate made of synthetic resin, a winding stem attached to the main plate so as to be movable in parallel to the surface of the main plate, a Tsuzumi wheel attached to the winding stem so as to be movable in the axial direction, It consists of an engaging part that engages with the tension wheel and a cannula having a spring part that is elastically deformed as the winding stem moves, and after the cannula extends downward from the engaging part, The spring portion is formed to extend along the surface of the main plate, and the spring portion mounting surface on which the spring portion of the cannula is disposed is located at the periphery of the main plate, and is one step lower than the surface on the center side of the watch. The side wall of the spring part mounting surface on the watch center side is formed in a convex arc shape and partially has a horizontal protrusion that protrudes in the horizontal direction; A holding structure for a spring member in a timepiece, which is locked between an arcuate side wall and the horizontal protrusion.