JPS6042394Y2 - Mounting structure of electronic parts for watches - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for electronic components for a watch.

The conventional mounting structure of electronic parts for watches is generally shown in Figure 1~
As shown in FIG. 4, fixing the circuit board 7 to the movement is completely separate from fixing the lead terminal section 2 of the electronic watch component.
Solder 4 or pin 3 to the circuit pattern 5 wired on the circuit board surface prepared in advance or to the lead frame.
etc., it was completely fixed and at the same time had electrical continuity.

However, with this method, it is necessary to secure a certain area for soldering and pin-setting for both terminals of watch electronic components, and in order to ensure electrical continuity between the lead terminals of watch electronic components, lead It is necessary to wire the circuit pattern to the terminals, which already limits the area occupied by the circuit board of the watch, forcing a difficult design.This is a major hindrance to the development of smaller, lower-cost electronic watches, which are required these days. It had become.

In order to eliminate the above-mentioned drawbacks, the present invention doubles as a temporary fixing member for electronic components for watches, allows the electronic components to be handled as components in the same way as conventional circuit blocks, and also allows the circuit board to be attached to the movement. Similar to fixing, lead terminals are provided on some of the electronic components to enable the final fixation of the electronic components, and by effectively using the circuit board area, the aim is to make the movement smaller and lower the cost. This is what I did.

The present invention will be explained below with reference to embodiments shown in FIGS. 5 to 8.

1 is an electronic component such as a trimmer capacitor, and 2 is a lead terminal of the trimmer capacitor of the present invention, which is branched from the middle into a final fixing lead terminal 2a part and a temporary fixing lead terminal 2b part, and these 2a part and 2b part The trimmer capacitor 1 is temporarily fixed to the circuit board 7 by sandwiching the circuit board 7 cross-sectionally.

Reference numeral 5a denotes a circuit pattern printed on the circuit board 7, and the wiring is done only on the back side of the circuit board 7.

Since the leads 2a are on the front side, there is no fear of electrical short-circuiting even if the leads 2a intersect with the circuit pattern 5a wired on the back side with the circuit board 7 interposed therebetween.

8 is the circuit block set screw, by tightening the screw,
The circuit board 7 is fixed to the movement, and at the same time the lead terminal 2a of the present invention is finally fixed, and the potential of the lead terminal 2a is dropped to the ground plate 10 which is positively grounded via the circuit block fixing pin 9 to establish electrical continuity. is taking.

11 is a stator, 12 is a coil, and 13 is a magnetic core.

A coil lead plate 14 has a pattern printed on its surface and makes surface contact with the circuit pattern 5 to establish electrical continuity.

As described above, according to the present invention, since the lead terminals of the trimmer capacitor 1 are temporarily fixed, the handling as a circuit block during assembly is completely different. The amount of work required for fixing the lead terminals of capacitor 1, such as soldering and pin-standing, can be halved, and important quality problems such as solder cracks and poor continuity between pins and circuits can also be halved. The required space can be reduced.

Further, since the lead terminal 2a of the trimmer capacitor 1 is electrically connected directly to the circuit block fixing screw, there is no need to newly install a pattern in which the potential has dropped to a positive level.

Particularly recently, in order to keep the cost of watches low, including the embodiments, printed wiring of circuit patterns on circuit boards is often designed on only one side.

Moreover, there is a strong desire to make watches smaller, so there is a limit to fixing and wiring all the electronic components within the limited area of the circuit board, so it is not necessary to create new patterns as in the present invention. Moreover, being able to overlap two-dimensionally with other patterns without causing short-circuiting was extremely effective not only in reducing the cost of watches but also in making watches more compact.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing the conventional electronic component mounting structure, FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a cross-sectional view showing the electronic component mounting structure of the present invention. Figure 6 shows the fifth
7 is a plan view of the electrically conductive portion of the coil lead board and circuit board portion of FIG. 6, and FIG. 8 is a sectional view of FIG. 7. 1...Trimmer capacitor, 2a...
Lead terminal for final fixing, 2b...Lead terminal for temporary fixing, 4...Solder, 5a...Circuit pattern, 7...Circuit board, ...Circuit block set screw, 10...Main plate, 14...
...Coil lead board.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An electronic component provided with lead terminals for sandwiching and temporarily fixing a circuit board, a circuit board with a circuit pattern formed only on one side, and a circuit for fixing this circuit board to a movement. board fixing screws, the lead terminals sandwich the circuit board to temporarily fix the electronic component to the circuit board, and the circuit board fixing screws partially attach the lead terminals to the circuit board. A mounting structure for electronic parts for a watch, characterized in that the circuit board is fixed to the movement, and the circuit board is fixed to the movement. 2. A lead terminal of an electronic component located on the other surface of the circuit board on which no circuit pattern is formed intersects a part of the circuit pattern formed on one surface with the circuit board in between. A structure for mounting an electronic component for a timepiece as set forth in claim 1 of the patent registration claim.