JPH0447675Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention can be applied to portable watches such as crystal watches. More specifically, the present invention relates to a winding stem holding structure that slidably holds the winding stem in the portable watch.

BACKGROUND TECHNOLOGY Conventionally, this type of winding stem holding structure, for example,
The configuration was as shown in FIGS. 9 and 20.

In the winding stem holding structure shown in FIG. 19, a bottom plate 1 is provided with a side portion 1a, and a resin insulating seat 2 placed on the front side of the bottom plate 1 is provided with a groove portion 2a facing the side portion 1a. Then, the small diameter portion 3a at the tip of the winding stem 3 was inserted into the space formed by the sidewall portion 1a and the groove portion 2a, and the winding stem 3 was held.

On the other hand, in the winding stem holding structure shown in FIG. 20, a horizontal hole 4a is formed in the main plate 4, a small diameter portion 5a at the tip of the winding stem 5 is inserted therein, and the winding stem 5 is held by the main plate 4.

Problems to be solved by the invention However, in the conventional winding stem holding structure mentioned above,
Each had the following problems.

For example, in the winding stem holding structure shown in FIG. 19, when a strong pushing force F in the axial direction is applied to the winding stem 3, the main plate 1 and the resin insulating seat 2 may be damaged.

Further, in the winding stem holding structure as shown in FIG. 20, a horizontal hole 4a had to be bored in the main plate 4, which was troublesome and time-consuming to process.

Therefore, in order to facilitate machining, there was a structure in which a horizontal hole was formed in the insulating seat at the same time as molding, and a small diameter portion at the tip of the winding stem was inserted into the horizontal hole to hold the winding stem. However, the insulating seat made of resin has insufficient durability to support the sliding and rotating winding stem for a long time.

Therefore, the purpose of this invention is to solve such problems in the above-mentioned winding stem holding structure of a portable watch, to eliminate the risk of damaging parts even if a strong pushing force is applied to the winding stem, and to eliminate the possibility of damage during processing. The purpose is to make it easy to use and to have durability.

Means for Solving the Problems Therefore, the winding stem holding structure according to this invention has a main plate 10 as shown in the illustrated embodiment below.
In a mobile watch which is provided with a circuit block 33 and a metal circuit reinforcing plate 34 which is overlaid on the circuit block 33 to reinforce it, the circuit reinforcing plate 34 is bent to form a winding stem holding portion 34f. death,
A winding stem fitting hole 34i is formed in the winding stem holding portion 34f, and the winding stem 41 is inserted into the winding stem fitting hole 34i.
The stepped portion 41j is inserted into the stem holding portion 34.
It is characterized by holding the winding stem 41 so that it abuts against f.

Function The winding stem 41 is held securely by the winding stem holding portion 34f of the metal circuit reinforcing plate 34.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to the drawings.

FIG. 5 shows an exploded view of the front side of the main plate 10 of a wristwatch movement equipped with a winding stem holding structure according to this invention. As you can see from this figure 5,
In the illustrated embodiment, the base plate 10 is formed into an oval plate shape. Two reference pins 11 and 12 are erected on the front side of the base plate 10. Then, the stator 13 is stacked on the surface of the base plate 10 using one of the reference pins 11 as a reference. Furthermore, the base plate 10
On the surface of the bar, the Hinoura wheel 14 is placed, and the regulation lever 16 is attached by fitting the elongated hole 16a into the lever pin 15 set up near the outer periphery.

As shown in FIG. 6, the regulating lever 16 has a head extending on one side from a body having an elongated hole 16a and three legs extending on the other side. The head is tapered and has a seventh
As can be seen from the figure, the tip 16b is slightly raised. The three legs each have a return spring portion 16c.
, a reset spring portion 16d, and a restriction spring portion 16e. Then, the tip of the return spring portion 16c is pressed against the hole wall 10a of the main plate 10 as shown in FIG. Prevents clockwise rotation.

As can be seen from FIG. 5, on the front side of the main plate 10,
Also, put up the winding stem presser pin 18 and attach it to the round hole 19a.
and attach the winding stem presser foot 19. As can be seen from Fig. 8, the winding stem presser foot 19 has a round hole 19a.
A U-shaped winding stem engaging part 19c is formed following the U-shaped neck part 19b on one end side with the center being in the middle, and the winding stem engaging part 19c is bent 90 degrees to form a concave shape.
On the other hand, the other end of the round hole 19a is straightened out and the tip is bent upward diagonally to form a contact portion 19d. Then, the winding stem engaging portion 1
9c is inserted into the slot 10b of the main plate 10, and the winding head 19 is attached on the main plate 10.

Then, as shown in FIG. 5, the above-mentioned stator 13, hour wheel 14, regulating lever 16, winding stem presser foot 19, etc. are sandwiched and a resin insulating seat 20 is placed thereon. The insulator 20 is connected to the other reference pin 1
2 on the surface of the main plate 10.
At this time, the aforementioned winding stem engaging portion 19c is inserted into the slot (not shown), and rotation of the winding stem presser 19 is prevented by the main plate 10 and the insulating seat 20.

Then, as shown in FIG. 9, the center wheel and pinion 21 is attached to the center of the main plate 10, and the rotor wheel 21 is inserted into the rotor hole 13a of the stator 13 mentioned above.
Enter 2. The regulation spring portion 16e of the regulation lever 16 described above is adjacent to the rotor wheel 22. After that, pass through it from above the insulating seat 20 and attach the third wheel 2.
3. Install the fourth wheel 24 and fifth wheel 25 in the order of third wheel 23, fifth wheel 25, and fourth wheel 24. Fourth wheel 2
4 is inserted into the center of the center wheel & pinion 21 as shown, and held coaxially with each other. And rotor car 2
2 is the fifth wheel & pinion 25, and the fifth wheel & pinion 25 is the fourth wheel & pinion 24.
The fourth wheel & pinion 24 meshes with the third wheel & pinion 23, and the third wheel & pinion 23 meshes with the second wheel & pinion 21, respectively. Thus, the gear train bridge 26 is attached with reference to the two reference pins 11 and 12 described above, and these gears are rotatably supported between them and the base plate 10, respectively. As can be seen from FIGS. 5 and 9, one of the reference pins 1
Screw the gear train retainer screw 27 into the gear train retainer 26
to be fixed.

Thereafter, as shown in FIG. 5, a coil block 29 is attached to the base plate 10 via the stator 13 and fixed with a coil set screw 30. On the other hand, a reset pin 31 is inserted into the pin hole 20b of the insulating seat 20 as shown in FIG. The reset pin 31 is placed adjacent to the reset spring portion 16d of the regulation lever 16 described above. Also, dowel 2
0c and attach the battery negative terminal plate 32, and although not shown, a part of the negative terminal plate 32 is inserted into the groove of the insulating seat 20 to make it unrotatable. Furthermore, the dowel hole 33a is fitted into another dowel 20d of the insulating seat 20, and the dowels 20c, 2
Position it at 0d and attach the circuit reinforcing board 34. The circuit reinforcing plate 34 is made of metal and is placed on the circuit block 33 to reinforce it. Then, a thin marking plate 35 is attached thereon, and the 10th marking plate 35 is attached.
As shown in the figure, the hole 35a of the marking plate 35
Insert the screw 36 from the hole 34 of the circuit reinforcing board 34.
c, through the hole 33b of the circuit block 33 and the hole 29a of the coil block 29, and attach it to the screw hole 10c of the main plate 10. In addition, the marking plate 35
Another screw 37 is inserted through the hole 35b, passes through the hole 34d of the circuit reinforcing board 34, and is attached to the reference pin 12. Then, the marking plate 35 is fixed, and the coil block 29 and the gear train bridge 26 are fixed.
Cover the entire surface of the main plate 10 and attach it to the outer side of the main plate 10. Necessary markings are applied to the outer surface of the marking plate 35. Then, as shown in FIG. 10, the circuit block 33 is pressed to prevent the above-mentioned reset pin 31 from coming off. Similarly, the circuit block 33 presses the contact portion 19d of the winding stem presser 19 described above, and electrical continuity is established between the state shown by the dashed line and the state shown by the solid line in FIG.

Thereafter, the button battery 38 is attached as shown in FIG. 12 by contacting the negative electrode with the contact piece 32a of the battery negative terminal plate 32 described above. The battery holding portion 34e of the circuit reinforcing board 34 described above is pressed against the circumferential surface of the battery 38 to hold the battery 38 and also establish electrical continuity.

By the way, as shown in FIG.
f, a base plate hooking part 34g, and another presser part 34h. The winding stem holding portion 34f is bent at a right angle toward the main plate 10, and a winding stem fitting hole 34i is formed therein. The main plate hooking portion 34g has an inverted T shape, and has a first
As shown in FIG. 3, bend it at right angles toward the main plate 10 and hang the tip on the main plate 10. The presser part 34h is
As shown in FIG. 13, it is similarly bent at a right angle toward the main plate 10, and the tip presses the winding stem presser 19 from above.

Now, as shown in FIG. 1, correction holes 10d and 20a are opened in the main plate 10 and insulating seat 20 facing each other, and a fifth hole is provided in these correction holes 10d and 20a.
As shown in the figure, the correction wheel 40 is inserted from the back side of the main plate 10. The correction wheel 40 is made of resin, and as can be seen from FIG. 14, two fast-forwarding pawls 40b are formed on the outer periphery of the middle part of the cylindrical part 40a with an interval of 180 degrees from each other, and two fast-forward pawls 40b are formed on the outer periphery of the outer part. Fast forwarding claw 40
c and the fast-forwarding claws 40b are shifted by 90 degrees from each other and are also spaced apart from each other by 180 degrees. On the other hand, on the inner periphery of the intermediate portion of the cylindrical portion 40a,
A narrow diameter portion 40d having a slightly smaller diameter is formed. In the illustrated embodiment, since a movement with a calendar is shown, a correction wheel 40 is attached, but if a calendar mechanism is not provided, the correction wheel 40 is of course unnecessary and does not need to be attached.

Therefore, as shown in FIG.
Insert the winding stem 41 inside. As can be seen from FIG. 5, the winding stem 41 is inserted from the outer periphery of the main plate 10 toward the center.

For example, two types of winding stems are prepared, one for two-step pulling and one for one-step pulling, and one of them is appropriately selected and used depending on whether or not it has a calendar. In the illustrated embodiment, since the embodiment is equipped with a calendar, a winding stem 41 for two-step pulling as shown in FIG. 15 is used. That is, the small diameter portion 41a is provided at the inner end.
It has a gear part 41b centered on the small diameter part 41a, and a large diameter part 41c, an abacus bead part 41d, and another large diameter part 41e are sandwiched in this order in the middle, and at the outer end. It has a threaded portion 41f. A reuse 42 is attached to the threaded portion 41f as shown in FIG. It should be noted that the winding stem 41 has an axial groove 41g on the front outer periphery of the large diameter portion 41c at the same time as cutting teeth on the gear portion 41b.
It is formed by forming multiple .

Then, the small diameter portion 41a is inserted into the center hole of the above-mentioned correction wheel 40, and the gear portion 41b is also passed through.
The tip of 1a is inserted into the winding stem fitting hole 34i of the circuit reinforcing plate 34 described above. Then, the narrow diameter part 40d of the correction wheel 40 passes through the front part of the large diameter part 41c, and the intermediate groove 41 of the large diameter part 41c as shown in FIG.
Put it in h. At this time, as shown in FIG. 4, the downward step 34j formed on the stem holding portion 34f of the circuit reinforcing plate 34 is brought into contact with the shoulder of the insulating seat 20 to accurately position the stem 41 at the height. stipulated in

By the way, when inserting the winding stem, the large diameter portion 41c of the winding stem 41 pushes the head end 16b of the regulating lever 16 at the same time as the winding stem 41 is inserted. Then, the return spring portion 16c is bent, and the regulating lever 16 is slid while being guided by the lever pin 15 and the regulating pin 17, and the winding stem 41 is suddenly retreated out of the movement locus. However, when the winding stem 41 is almost completely inserted, the tip 16b climbs over the large diameter portion 41c, and the regulating lever 16 returns by the force of its own return spring portion 16c, causing the tip 16b to slide into the abacus ball as shown in FIG. It engages with the portion 41d. The winding stem engaging portion 19c of the winding stem presser foot 19 also engages with the winding stem engaging portion a between the large diameter portion 41e and the abacus bead portion 41d as shown in FIGS. 16 and 17. However,
In this state, the lever pin 15 is positioned within the elongated hole 16a of the regulating lever 16 as shown in FIG.

Therefore, if an axial force is applied to the winding stem 41 to push it, the small diameter portion 41 will move as shown in FIG.
The leading end step portion 41j between the gear portion a and the gear portion 41b abuts against the winding stem holding portion 34f, and the circuit reinforcing plate 34 receives the pushing force.

Then, when the winding stem 41 is pulled out one step from this state, the winding stem engaging portion 19c escapes due to the elasticity of the winding stem presser foot 19 and is disengaged from the winding stem foot engaging portion A of the winding stem 41, and is engaged with the next winding stem presser foot. It engages with the intermediate groove 41i of the abacus bead part 41d, which is part B. In addition, the regulation lever 16
In this case, the tip 16b is pulled by the large diameter portion 41c, and the lever pin 15 and the regulating pin 17 are connected without rotating.
It slides on the main plate 10 while being guided by. The front outer periphery of the large diameter portion 41c is then engaged with the narrow diameter portion 40d of the correction wheel 40 as shown in FIG.
Then, the rotation of the winding stem 41 turns the correction wheel 40 to enable calendar correction. Subsequently, when the winding stem 41 is pulled out one more step, the winding stem engaging portion 19c escapes again and comes off the intermediate groove 41i, and the winding stem presser engaging portion between the next abacus ball portion 41d and the large diameter portion 41c is engaged. engage with. Then, at this time, the gear portion 41b is engaged with the hinoura wheel 14. In addition, the regulation lever 16
The tip 16b rides on the large diameter portion 41c, rotates clockwise in FIG. Also, the reset spring portion 16d is brought into contact with the reset pin 31 to reset. Thus, by rotating the winding stem 41, the hour wheel 14 is turned, making it possible to adjust the time.

In addition, when a calendar is not used, the correction wheel 40 is eliminated as described above, and a winding stem for one stage pull is used. When a one-stage winding stem is used, the regulating lever 16 is in the same state as when the two-stage winding stem 41 is pulled out one stage when the winding stem is pushed in, and when the winding stem is pulled out, the two-stage winding stem 41 The state is the same as when the is pulled two steps. Therefore, in the case without a calendar, when the winding stem is pulled out one step, the regulation lever 16 rotates about the lever pin 15, making it possible to adjust the time.

By the way, when pulling out the winding stem 41, the recess 1 provided at the base of the neck 19b of the winding stem presser foot 19 described above is used.
For example, insert the tip of a pair of tweezers into the winding stem 9e (see FIGS. 6 and 8), bend the winding stem presser foot 19, and push down the winding stem engaging portion 19c.

Effects of the invention Therefore, according to this invention, since the tip of the winding stem is held by the winding stem holding portion of the metal circuit reinforcing plate, the pushing force in the axial direction applied to the winding stem is received by the circuit reinforcing plate. It provides reliable support and prevents damage to other parts such as the base plate and insulating seat. It is also easy to process, as there is no need to drill horizontal holes in the base plate.
Furthermore, since the winding stem is supported by a metallic circuit reinforcing plate, there is little wear even after years of use, resulting in excellent durability.

[Brief explanation of the drawing]

1 to 18 show a wristwatch movement equipped with a winding stem holding structure, which is an embodiment of this invention.
3 and 3 are respectively perspective views showing the fitted state of the winding stem tip and the winding stem holding part, FIG. 4 is an explanatory view seen from the winding stem tip in the axial direction, and FIG. 5 is an exploded view of the front side of the main plate. A perspective view, FIG. 6 is a plan view of the main part on the front side, FIG. 7 is a sectional view taken along line b-b in FIG. 6, FIG. 8 is a perspective view of the winding stem presser, and FIG. Cross-sectional view along
Figure 10 is a sectional view taken along the line CC in Figure 6, Figure 11 is a sectional view taken along the line dd in Figure 6, Figure 12 is a sectional view of the battery negative terminal plate, and Figure 13 is the circuit reinforcement board. A perspective view of a part of the part, FIG. 14 is a perspective view of the modified vehicle,
Figure 15 is a side view of the winding stem, Figure 16 is e of Figure 6.
17 is a perspective view showing the engagement state between the winding stem and the winding stem presser, and FIG. 18 is a sectional view showing the engagement state between the winding stem and the correction wheel. FIG. 19 and FIG. 20 are sectional views each showing a conventional winding stem holding structure. 10...Main plate, 33...Circuit block, 34...
...Circuit reinforcing plate, 34f... Winding stem holding plate, 34i...
... Winding stem fitting hole, 41... Winding stem, 41j... Stepped portion.

Claims (1)

[Scope of utility model registration request] In a mobile watch that is equipped with a circuit block and a metal circuit reinforcing plate that is stacked on top of the circuit block and reinforcing it on the front side of the main plate, the circuit reinforcing plate is bent to form a winding stem holding part and the winding stem is A portable device comprising: a winding stem fitting hole formed in the stem holding portion; and the tip of the winding stem inserted into the stem fitting hole to hold the winding stem so that the stepped portion abuts the winding stem holding portion. Clock stem holding structure.