JPS6231904Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an arrangement structure of terminals for inspection and adjustment of an electronic timepiece.

It is customary to install a power supply terminal for inspection on the back cover side of the watch movement, an output terminal for outputting from the circuit board to the step motor, and a fast-forward terminal for wheel train drive check as terminals for inspection and adjustment.

By installing a terminal for this purpose, it can be used for inspecting and adjusting the movement when assembling the watch, and if the watch malfunctions, you can simply open the back cover while the movement is in the watch case. This has the advantage of being able to investigate the cause.

In other words, if such a terminal is available, it can be easily determined whether the problem is related to the battery or the gear train.

Therefore, there is no need to unnecessarily remove the movement from the watch case during repairs at a watch shop or the like.

For the reasons mentioned above, it is necessary to provide an inspection/adjustment terminal on the back cover side of the movement in consideration of assembly and after-sales service in order to facilitate inspection/adjustment of the movement and investigation of causes of failure. It must be placed so that it can be easily viewed with the lid open and can be connected to a terminal on an inspection/measuring device such as a tester.

Conventionally, in a circuit board in which an electrode pattern is formed only on one side, that is, the dial side, for the purpose of cost reduction, when arranging the above-mentioned terminals, a stud made of a conductive material such as metal is passed through the circuit board. The studs were configured to function as inspection/adjustment terminals by being fixed to the electrode patterns formed on the terminals with solder or the like.

However, in the conventional structure as described above, it is difficult to downsize the structure because of the area required for the studs, and the cost increases due to the studs.

The purpose of this invention is to use a dummy pattern in which test and adjustment terminals are provided on a coil terminal processing sheet in a watch equipped with a circuit board that has adjustment terminals formed on only one side for testing and adjusting the IC drive. The aim is to reduce the number of parts and cost by outsourcing.

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a sectional view of essential parts of a timepiece according to the present invention, and FIG. 2 is a partial plan view of the timepiece shown in FIG. 1, viewed from the back cover side. In Figures 1 and 2, 1 is the main plate;
2 is a tube fixed to the base plate 1. A yoke 3 constituting a step motor and a coil core 5 around which a coil 4 is wound are positioned on the tube 2 in this order. On the coil winding core 5 is a convex portion 5a provided on the coil winding core 5, and a coil end processing sheet 6 is provided on the coil winding core 5.
electrode patterns 6a and 6b connected to the coil terminal 4a and a dummy pattern for inspection and adjustment (for example, a fast-forward dummy for checking the wheel train drive in a watch with a 20-second interval). Pattern) 6c is formed. Reference numeral 7 denotes a circuit board on which IC8 and the like are mounted, and electrode patterns electrically connected to electrode patterns 6a and 6b, which are step motor drive terminals of IC8, are on the bottom side, that is, the side facing the dial 10 of the watch. Adjustment terminals 7c, etc. connected to 7a, 7b and dummy patterns 6c for inspection/adjustment are formed, and a portion of each is connected to electrode patterns 6a, 6b and dummy patterns 6c formed on the above-mentioned coil terminal processing sheet 6. They are positioned and fixed to the tube 2 with screws 9 in a planar overlapping state, and conduction between the circuit board 7 and the electrode pattern formed on the coil terminal processing sheet 6 is ensured.

In addition, a cutout 7b etc. is provided in the circuit board 7 so that a part of the dummy pattern 6c formed on the coil terminal processing sheet 6 can be seen from the back cover side, and it can be easily connected to the inspection terminal of an inspection/measuring device such as a tester. It is located so that it can be connected to.

As described above, according to the present invention, there is no need to fix rivets, etc. for external lead-out for inspection and adjustment to the circuit board, and a dummy pattern is provided on the sheet for coil terminal processing, and terminals for inspection and adjustment are provided. By extracting it externally, it is possible to reduce the number of parts and, therefore, to reduce costs, which makes mass production advantageous, and has the great result that it is also advantageous in miniaturizing watches.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a timepiece according to the present invention, and FIG. 2 is a partial plan view of the timepiece shown in FIG. 1, viewed from the back cover side. 1...Main plate, 2...Tube, 3...Yoke,
4... Coil, 4a... Coil terminal, 5... Coil winding core, 6... Coil terminal processing sheet, 6a,
6b... Electrode pattern, 6c... Dummy pattern, 7... Circuit board, 7a, 7b... Electrode pattern, 7c... Adjustment terminal, 8... IC.

Claims (1)

[Scope of utility model registration request] In an electronic watch equipped with a circuit board equipped with an IC, a step motor, etc., the circuit board has, on one side only, adjustment terminals for inspecting and adjusting the IC, and electrodes connected to the coils constituting the step motor. A step motor drive terminal connected to the electrode pattern and a dummy pattern connected to the adjustment terminal are provided on the sheet provided for connecting the ends of the coil. A terminal arrangement structure for an electronic watch, characterized in that the dummy pattern is arranged so as to be led out.