JPS58186075A - Switch structure of electric timepiece - Google Patents

Abstract

PURPOSE:To make a timepiece thinner and small-sized, and to make it inexpensive by simplifying the switch structure, by placing a circuit base plate so as to be superposed like a plane on a switching member operated by an external operating member. CONSTITUTION:A base frame 1 is formed by outsert-forming a plastic material 1b to a metallic reinforcing plate 1a, the plastic material 1b bears a winding stem 2 of an external operating member, and the winding stem 2 is engaged so as to be slidable and rotatable in the axial direction with a clutch wheel 3 being a switching member. Also, a part of a circuit base plate 8 is placed so as to be superposed like a plane on said switching member 3. According to such a constitution, a timepiece can be made thin and small-sized, and also it can be manufactured at a low cost since the number of parts and the number of working are reduced due to simplification of the switch structure.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch structure such as a reset switch for a 1-clock watch that uses a crystal or the like as a vibration source, and is capable of making the watch thinner and smaller, and by simplifying the switch structure. The objective is to provide products that reduce costs by reducing the number of bone machining processes.

With the rapid spread of quartz watches, lower prices and dressier, smaller, and thinner watches have determined the competitiveness of the product, causing them to become obsolete very quickly.

The present invention enables more advantageous commercialization under these circumstances, and will be described below with reference to the drawings of FIGS. 1 to 4.

Reference numeral 1 in FIG. 1 is a base frame (hereinafter referred to as the base plate), which is made by outsert-molding a plastic material 1b on a metal reinforcing plate 1a. is slidably and rotatably engaged with the switch wheel 5, which is a switching member, in the axial direction, and is engaged with the mandarin duck 4 which is supported on the mandarin duck shaft 1C fixed to the metal reinforcement jf11avr. A cannula 5 supported by a support leg 1d fixed to a metal reinforcing plate 1a
is a screw 7 that engages with the mandarin duck 4 and the tsuzumi wheel 3 and holds down the mandarin duck 4 and the cannula 5 with a cannula presser 6 that is guided by the mandarin duck shaft 1C and the foot 1d.
A switching structure is constructed by fixing the screw to the support leg 1e.

8 is a film-like circuit board made of synthetic resin such as polyimide, on which MO8IO9 is mounted by gigantic bonding and a crystal resonator 10 is mounted by soldering, the bottom of the circuit block is tube-shaped, and outsert molding of base@1 is carried out. Backup member 11 made of metal material by incorporating dowels 1f and 1g into the guide and twisting
By fixing with screws 12, 13, and 14,
The circuit fund 8 is reinforced. A part of the circuit board 8 is arranged so as to overlap with the switching member in a plane, and also forms an elastic part 8b with a sulin 8a, and the root part of the elastic part 8b is connected to the backup part 11vr-.
By pressing the provided convex portion 11a in the cross-sectional direction of the watch, the tip portion of the elastic portion 8b comes into pressure contact with the tip of the dowel 4a provided on the mandrel 4, which is an element of the switching member, and the dowel 4a is rotated and positioned by the rotation center of the mandarin shaft 1c (i7) and the click part of the cannula pusher 6 by the operation of pulling out the winding stem 2,
Only when the needles are aligned (with a calendar at the third drawer level, and without a calendar at the second drawer level), the dowel 4a is pressed against the electrode pattern 8C provided on the elastic part 8b. The reset switch 1r is configured by grounding the main plate IK through the front power distribution, and preventing wear and poor conduction due to the sliding of the dowel 4a of the pole pattern 8C, and also preventing the negative effects of the increase in the click force for pulling out the winding stem 2. In order to prevent this, by providing the circuit fund 8vc slit 8a, the elastic force of the elastic i8b is weakened, and the protrusion 11a provided on the backup member 11 is located on the root side of the elastic s8b. However, the switch section of the elastic section 8b is very sensitive to variations in the precision of the section, and in order to eliminate this, the fixing screw 13 of the backup member 11 is disposed near the convex section 11a, and the In order to prevent the deformation of the elastic part 8b and to sandwich the root part of the elastic part 8b between the plastic molded part 1b of the base metal 1 and the backup member 11 to further improve the clamping force, the backup member 11
A reinforcing portion 11b'fr is provided by drawing etc. by press working, and the shape of the tip of the mandarin dowel 4a has a smooth roundness by combining the flow direction of the material and the punch position in the extrusion process by press. This is possible by changing the shape. Also,
The distortion of the circuit board 8 caused by the protrusions 9s 11 a of the backup member 11 has an adverse effect on others (for example, the thrush wheel 6
The reduction in the cross-sectional gap between the guide dowel 1 and the guide dowel 1 is absorbed by the aa portion of the guide dowel 1, and is also prevented by providing a dowel 1h on the base fi+1, and by the guide dowel 1, the foot 11.

As described in detail above, according to the present invention, the dedicated space for forming the tx reset switch structure can be replaced by the existing one without using the switching member itself or a new FC switch member linked to the switching member By cleverly utilizing the flat cross-sectional space, it is possible to make the watch thinner and smaller, and by reducing the number of parts and combining existing processing techniques, the number of man-hours can be reduced, which has the advantage of further contributing to cost reduction. have Further, the circuit board 8 is made of a polyimide material and has relatively little elastic force, and as an elastic part, there is little sagging.According to the structure of the present invention, the contact pressure of the switch part 6- is several tens of grams or less, and the electrode pattern is abraded. There is almost no peeling, and the effect on the winding stem pull-out force is less than a few degrees, so there are no functional problems, making it possible to create an extremely stable, durable, and reliable switch structure.

Furthermore, since the electrode pattern 8a provided on the circuit board 8 and the dowel dowel 4a do not require any other intervening members, there is an advantage that the accuracy of the switch timing is improved and the timing can be easily matched with transportation regulations.

Similarly, since the present invention uses a small watch as an example,
Although the circuit board plate (a) requires a VC slit (8a), if it is a large watch, the elastic plate (8b) can be made large and it can be put to practical use without the slit.

[Brief explanation of the drawing]

FIG. 1 is an assembled plan view of a timepiece showing one embodiment of the present invention, FIG. 2 is an assembled sectional view of the timepiece showing one embodiment, and FIG. FIG. 3 is a plan view of a circuit block. Names of main parts 1... Base 1b... Plastic molded part 2... Volume Shin 4... Mandarin dowel 4a... Dowel 8... Circuit board board 8a...Slit 8b...Elastic part 8b...Electrode pattern 11...Backup member 11a...Convex part 11b...Reinforcement part and above Applicant Shiojiri Kogyo Co., Ltd. Company: Shikikozukosha Agent Patent Attorney: Saishi

Claims (5)

[Claims] (1) In an electric clock having a base frame, a power source, a photographing source, a circuit means, a switching means, an external operating member, etc., the circuit means includes a circuit board having a film-like circuit pattern and a complete backup of the circuit board. The circuit board is arranged so as to overlap the switching member operated by the external operating member in a plane, and the pattern portion and the non-pattern portion are pressed against the switching member by the elastic force of the circuit board itself. A switch structure for an electric watch, characterized in that the back member is provided with a convex portion. (2) The circuit board is characterized in that an elastic part is provided with a slit metal part, the tip side of the elastic part presses against the switching member, and the base side presses against the convex part of the backup member. A switch structure for an electric timepiece according to claim 1. (3) The switch structure according to claim 1, characterized in that a base portion of an elastic portion provided on the circuit board is closely held between the base frame and the back end lug portion. (4) The switch structure according to claim 1, characterized in that a fixing portion of the backup member is provided near a convex portion provided on the backup member, and a reinforcing portion of the member is provided. (5) A patent characterized in that the non-elastic portion of the circuit board divided by the slit, and moreover, the protrusion and the foot provided on the base frame are arranged so as to be able to hit the vicinity of the slit. A switch structure according to claim 1.