JPH0452709Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a switching mechanism for an electronic timepiece.

[Prior art]

The switching mechanism of conventional electronic clocks was developed in Japanese Patent Application Laid-Open No. 1986-
106487 and Utility Model No. 57-190488. As is well known, the former has many components, and
The latter has a large winding stem position (distance from the bottom surface of the dial to the axis of the winding stem) and is made up of members that operate perpendicular to the plane of the main plate, making the watch thicker. On the other hand, JP-A-50-80168 can overcome the above-mentioned drawbacks to some extent, but in order to use it as a switching mechanism for analog quartz using a step motor, it is necessary to As the number of screws increases, the thickness of the bar plate becomes thicker. In addition, there is no reset mechanism when the needles are aligned, and the wheel cannot be guided when the winding stem is removed, resulting in problems when the winding stem is attached.

〔the purpose〕

The present invention focuses on the above-mentioned drawbacks of the conventional technology, and aims to simplify the configuration by reducing the number of component parts of the switching mechanism of an electronic timepiece, and also to make the electronic timepiece thinner.

[Means to achieve the purpose]

In order to achieve the above object, in the electronic watch of the present invention, the circuit board on which the circuit pattern is formed is sandwiched, and the switch, which is a component of the switching mechanism, is placed on one side, and the switch is placed on the other side. The structure employs a structure in which holding plate members for fixing the circuit board are placed one on top of the other. In an electronic timepiece adopting such an arrangement, a push-button protrusion is formed that penetrates the circuit board and protrudes from the push-plate side to the presser plate member side, and on the presser plate member side, the push-button protrusion An engaging portion that can be moved by the rear projection and engaged in multiple positions is integrally formed. Furthermore, this holding plate member is integrally formed with a bending engagement part that penetrates through the circuit board and engages with the hexagonal wheel located on the rear side. The hexagonal wheel is made to slide in conjunction with the engaging portion of the member.

Further, in a preferred embodiment of the present invention, a portion of the presser plate member is extended to form a protrusion that can be elastically deformed in a plane direction, and the tip of the protrusion is inserted through the circuit board. The bending engaging portion extends from above, and an engaging portion capable of engaging with the rear projection at multiple positions is formed in the middle of the projection.

Here, it is preferable that the elastically deformable protrusion further be integrally formed with a regulating part in a state of protruding from the protrusion.

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

1 to 4 are plan sectional views showing one embodiment of the present invention. Reference numeral 1 denotes a main plate, 2 a winding stem, and 3 a screw wheel which fits into a corner portion 2a of the winding stem and is slidable in the axial direction of the winding stem 2. The outer periphery of the Tsuzumi wheel 3 is supported by a support plate 1a of the main plate 1 and a circuit seat (made of plastic) 4. In addition, the winding stem 2 has its base connected to the main plate 1 and the circuit catch plate 4.
The tip is supported by the Tsuzumi wheel 3. 5 is a dowel that connects the engagement part with the groove 2b of the winding stem 2 and the dowel A.
5a and a dowel B5b, it follows the drawer pushing operation of the winding stem 2 and operates around the shaft 6.
7 is a circuit board with an electrode pattern (a double-sided pattern is also possible) placed on the main plate 1 (Oshidori 5) side, and a MOS
- It has an IC chip 8 and a crystal oscillator 9. or,
Holes 7c and 7d are formed in the circuit board 7 (the holes may be notches), and 10 is a holding plate that holds the circuit board 7.
is holding down. The presser plate 10 is a dowel A5
recessed portions 10a and 10b that engage with a, and a bent portion 10c that engages with a groove 3a of the suspension wheel 3 (the width of the groove 3a is sufficient to correspond to the thickness and backlash of the presser plate 10, so the distance from the center of the watch to the outer diameter becomes smaller) , regulating part 10d (the regulating part is 1/1/1 of the total length of the spring part from the base of the click spring 10e.
The position of the winding stem 2 in the axial direction is determined by pressing the dowel A5a with the click spring 10e and the recesses 10a, 10b. Furthermore, the holding plate 10 includes a battery positive terminal part 10f (which presses the side surface of the battery 12), a hook part 10g (which is hung on the base plate 1 and presses the crystal oscillator 9), and a pusher spring 10h. have. The pusher spring 10h has the function of establishing electrical continuity between the positive pattern 7a of the circuit board and the pusher 5 and pressing the pusher 5. Further, the dowel B5b is pressed against the main plate 1 so as to come into contact with the reset pattern 7b of the circuit board (the winding stem 2 is in the drawn-out state). Number 13 is the sun wheel, number 14 is the second wheel, and a sliding structure is used between the pinion and gears. 15 is the third wheel, 16 is the fourth wheel,
17 is the fifth wheel, 18 is the rotor, 19 is the stator,
20 is a coil block, 21 is a gear train bridge, 22, 2
Reference numeral 3 fixes the circuit seat 4, the circuit board 7, and the holding plate 10 with screw pins embedded in the base plate 1 using screws.

Next, the operation will be explained. FIG. 1 shows the normal state in which the winding stem 2 is pushed in. In this state, the stop wheel 3 and the clock wheel 13 are not engaged, and there is a gap between the regulating portion 10d and the fourth wheel & pinion 16. or,
The dowel B5b and the reset pattern 7b are also not in contact.

When the winding stem 2 is pulled out one step, the click spring 10e
is rotated clockwise by the dowel A5a. Therefore, the Tsuzumi wheel 3 is pushed by the bent portion 10c and meshes with the Hinomi wheel 13. Also, the regulating part 10d is also the fourth wheel & pinion 16.
The fourth wheel & pinion 16 is regulated by the spring.
By further rotating the winding stem 2, the needle can be adjusted.

Next, the timing of the start of adjustment and the start of meshing between the screw wheel 3 (instep tooth 3b) and the rear wheel 13 will be described. It is best to start meshing after the adjustment is started, and since the adjustment part 10d and the bending part 10e are made of the same material, it is only necessary to manage the mutual difference, which makes manufacturing easier and increases reliability. .

Also, when pulling out the winding stem 2, the tips of the teeth of the dial wheel 3 and the dial wheel may interfere with each other. However, as shown in FIGS. 3 and 4, the dowel A5a and the recess 10a,
Engagement position with 10b, Tsuzumi wheel 3 and bent part 10e
Since there is a cross-sectional difference in the engagement position with the click spring 10e, the click spring 10e is twisted. Therefore, even if there is interference between the tips of the teeth, they will not be destroyed. Further, an elastic portion may be provided between the recess 10b and the recess 10b in order to obtain the same effect.

The pusher 5, the suspension wheel 3, and the click spring 10e of the presser plate operate substantially parallel to the plane of the main plate 1.

With the above structure, the presser plate 10 can effectively use the plane space excluding the gear train and the battery 1, so that the click spring 10e can be made longer. Therefore, materials that require heat treatment, such as steel, are not required, and materials that do not undergo treatment, such as phosphor bronze, can be used, and costs can be reduced. Furthermore, in this example, when the base plate is molded from plastic, the wire can be used as an electrically conductive path between the battery and the circuit board, so that the wiring of the electrode pattern can be simplified. Furthermore, since the Tsuzumi wheel is supported by the main plate and the circuit seat, it is easy to attach the winding stem.

Although the present invention has been described in the case of three needles, it can also be applied to the case of two needles. Further, by providing three recesses in the presser plate, the present invention can also be applied to a switching mechanism for a calendar watch. Furthermore, a portion for driving the regulating portion may be integrally formed in a portion of the holding plate between the base of the click spring 10e and the bent portion 10c.

[Effect of idea]

As explained above, the present invention employs an arrangement in which the circuit board is sandwiched between the oshidori and the holding plate member, and this allows the holding plate member to occupy a wide planar space. An engaging portion that engages with the stopper and a bent portion that engages with the wheel are integrally formed to perform the function of a bolt. Therefore, according to the present invention, there is no need for a conventional bolt, a bolt retainer for fixing the bolt, etc., and the switching mechanism can be made into a simple structure with fewer parts. Further, since the bar holder is not required in this way, the thickness of the cross section can be reduced, and the switching mechanism can be made thinner.

In addition, when the above-mentioned engaging portion and bending portion are formed as elastically deformable protrusions formed by protruding the presser plate member, when setting the needles,
Even if the teeth of both the handwheel and the wheel do not mesh properly and interfere with each other, this protruding part and the bent part at its tip will be slightly torsionally deformed three-dimensionally. Become. Therefore, the teeth on both sides do not come into contact with each other due to excessive pressing force, so even if such interference occurs, problems such as damage to the teeth do not occur, which is preferable.

Furthermore, by integrally forming a regulating part for regulating the rotation of the fourth wheel and the like in addition to the above-mentioned engaging part and bent part, the number of parts constituting the switching mechanism can be further reduced. preferable.

[Brief explanation of the drawing]

Figures 1 to 4 are flat diagrams showing an embodiment of the present invention.
FIG. 1... Main plate, 2... Winding stem, 3... Tsuzumi wheel, 4
...Circuit catch, 5...Oshidori, 7...Circuit board, 10...Press plate, 16...Fourth wheel.

Claims (1)

[Claims for Utility Model Registration] A winding stem, a wheel wheel loosely fitted in a state in which it can slide in the axial direction with respect to a corner cut portion formed at the tip of the winding stem, and pushing and pulling of the winding stem. A circuit board that is interlocked with the operation and has a battery on one side and electronic components on the other side with the winding stem sandwiched in between, and is arranged in a cross-sectional manner along the outer periphery of the gear train part, overlapping the said lid. a presser plate member disposed overlapping the circuit board at a position opposite to the oshidori for fixing the circuit board in a predetermined position; and a presser plate member that penetrates the circuit board and extends from the oshidori side. an oshidori protrusion projecting to the side of the member; an engaging portion that is integrally formed with the presser plate member and is moved by the oshidori protrusion and engages with the oshidori protrusion at multiple positions; and the presser plate. a bending engagement part that is integrally formed with the member and penetrating the circuit board and engaging with the groove of the helical wheel in the board thickness direction; the bending engagement part is an engagement part of the presser plate member; 1. A switching mechanism for an electronic timepiece, characterized in that the switching mechanism is configured to slide the handwheel in conjunction with.