JPS58191983A - Structure of composite circuit - Google Patents

Abstract

PURPOSE:To reduce considerably the thickness of a complete module with the same capacity and redouble the capacity of a battery, by joining directly an odd-shaped paper battery to a circuit substrate to make them into one body. CONSTITUTION:Contents of a positive-pole current collecting lead 23 having the current collecting function, a positive-pole flux 10 on the lead, a separator 11, a negative-pole flux 12, a negative-pole current collecting lead 22 which is joined to the negative-pole flux 12 in the end part, etc. are laminated on a circuit substrate 7 in order, and they are covered with an upper cover 21b consisting of a synthetic resin film, and a part of the foot of the upper cover is joined to the circuit substrate 7 consisting of a synthetic resin while putting the negative- pole current collecting lead 22 and the positive-pole current collecting lead between the upper cover and the circuit substrate 7 tightly, and most of the foot of the upper cover is joined directly to the circuit substrate 7. Therefore, a bottom cover which faces oppositely to the upper cover 21b and is required conventionally is unnecessary, and the thickness of the whole battery is reduced.

Description

[Detailed description of the invention] This invention provides 'tJf to a circuit board in an electronic watch.

The inquiry into the pond is related to the structure).

FIG. 1 is a longitudinal sectional view of a timepiece module in which a paper battery is attached to a conventional composite circuit board. A display section 8 is attached to one side of the circuit board 7, and a group of elements necessary for displaying the time of a clock, etc. is attached to the opposite side. The element group mainly includes a paper battery 9, an IC 4, a crystal resonator 5, a device cover 6, and the like. Pe! The bottom cover 13 of the Par battery is made of a synthetic resin film, and a portion thereof constitutes a positive terminal. The positive electrode terminal 6a and the positive electrode terminal 3b are sandwiched between the circuit board 7 and the bottom surface, and fixed with the adhesive 12 while maintaining a higher position. On the other hand, the nine-pole lead 2b rises from and connects to the negative terminal 2a located on the top cover 1b', which is made up of the apex of the synthetic resin film, facing the bottom surface 1a on the positive terminal 6a side. Therefore, the total height H of the paper battery 9 from the circuit board 7,
has the disadvantage that it becomes too large and becomes the largest height among the elements on the circuit board 7.

FIG. 2 is a plan view showing the arrangement of the conventional timepiece module shown in FIG. 1. IC4 on each circuit board 77
, a crystal oscillator 5, a device power bar 6, a display section 8, and a paper battery 9 are arranged.The paper battery 9 has a simple planar shape, for example, a circular shape as shown in the figure, so the element group is There is another drawback to the case shown in FIG. 1 that the blank space after placement on the circuit board 7 becomes an unusable void.The purpose of the present invention is to eliminate these drawbacks. , a composite circuit block that integrates irregularly shaped paper batteries by directly bonding them to a circuit board.

The present invention will be described in detail below with reference to the drawings.

FIG. 3 shows a longitudinal sectional view of a paper battery in one embodiment of the present invention. A positive electrode current collection lead 23 that is active on the circuit board 7 and has a current collecting function, a positive electrode mixture 10, a separator 11, a negative electrode mixture 12, and a negative electrode collection connected to the negative electrode mixture at the end on the lead. Contents such as electrical leads 22 are laminated on top of which a top cover 21 made of a synthetic resin film is placed.
b, and a part of the bottom part of the upper cover tightly sandwiches the negative current collector lead 22 and the positive current collector lead, while the other part is directly bonded to the circuit board 7 made of synthetic resin. ing. For this reason, the bottom cover, which was required in the past to face the top cover 21b, is no longer necessary. In addition, the negative and positive current collector leads, which previously stood up at the top and bottom of the battery in the direction of increasing the overall height, can now be taken out to the side, reducing the overall thickness of the battery. Furthermore, as shown in Figure 4, the thickness of the completed watch module was significantly reduced.

FIG. 4 is a longitudinal cross-sectional view of a composite circuit board 07, which is an embodiment of the present invention and is constructed of the paper battery shown in FIG. 3. The structure of the paper battery 90 is as shown in FIG. 3 above. The features of this embodiment are as shown in Fig. 3 above.
Since one side of the cover that encloses the battery contents is also used as the composite circuit board 7, the thickness is reduced accordingly, and as shown in Fig. Negative current collector lead plate 26 and positive current collector lead plate 22
Thanks to , the unnecessary increase in thickness that is conventional when attaching the paper battery 90 to the composite circuit board 7 is reduced, and the thickness [1, is large under the same performance] after completion as a clock module. It decreased dramatically. Therefore, the battery mounting section, which conventionally formed the thickest part of the watch module, has always been kept at a lower thickness than the same element group as shown in FIG.

FIG. 5 is a plan view of the timepiece module of the present invention shown in FIG. 4. The arrangement of the element groups other than the paper battery 90 is the same as the conventional example shown in FIG. done. Thanks to this, we were able to approximately double the battery capacity without changing the thickness and width of the watch module. There is no problem in manufacturing the irregularly shaped paper battery 90.

As described above, according to the present invention, the thickness of the completed module can be greatly reduced under the same performance, and the capacity of the battery can be approximately doubled.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view of a watch module as a conventional example, FIG. 2 is a plan view of a conventional watch module, and FIG. FIG. 4 is a partial vertical sectional view of a timepiece module constructed from paper batteries according to one embodiment of the present invention (σ), and FIG. 5 is a plan view of the timepiece module of FIG. 4. 1a...Positive side bottom cover of paper battery, I
b, 21b...Negative electrode side top cover of paper battery, 2.22...Negative electrode current collector lead, 2a...
...Negative electrode terminal, 2b...Negative electrode lead, 6
．． 26...Positive current collector lead, 6a...
Retaining frame terminal, 6b...Positive lead, 7...
...Composite circuit board, 9...Conventional Heber battery, 90...
...An irregularly shaped paper battery according to an embodiment of the present invention.

Claims (1)

[Claims] (In an electronic watch using No. 11 film as a circuit board, a wiring electrode is formed on the circuit board, and a positive electrode mixture, a separator, a negative electrode mixture, an electrolytic solution, and a battery current collector/lead are sequentially stacked thereon, The outermost part is covered with a synthetic resin film, and the thickness of the outside of the film (2) is equal to or at least the thickness of the part with the integrated paper battery on the circuit board or other elements on the circuit board.