JPS6255117B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device having predetermined functions, such as an electronic wristwatch or a calculator.

Conventionally, electronic devices with small mounting dimensions, such as electronic watches and calculators, often use ICs (integrated circuit elements), and when LCDs are used as display bodies, their electrical connections are made using elastic materials such as zebra connectors. This is generally achieved by mechanical pressing force through a conductive connector.

This is because LCDs, unlike LEDs, have a problem in terms of lifespan, so when applied to this type of electronic device, it is difficult to bond them to the external leads and ohmics of the IC using the same soldering method as with LEDs. This is to avoid such problems and to connect them electrically using mechanical pressure (pushing force) so that the LCD can be replaced with a new one after its life.

However, in this type of electronic device,
In order to make good ohmic contact between the external leads of the IC and the LCD, a certain amount of load (mechanical pressing force) is applied to the elastic conductive connector such as the zebra connector.
Since it is necessary to add a
It is necessary to provide a mechanical pressing force between the external leads of the IC and the LCD. Therefore,
The mounting dimensions after assembly are large, and the structure uses an elastic conductive connector such as a zebra connector to electrically connect the IC and LCD.
The number of parts increases, and there are problems with ohmic contact and contact resistance in electrical connections. These problems can be solved by keeping the mounting dimensions as small as possible.
This is a major constraint in electronic devices such as electronic wristwatches and calculators, which aim to reduce costs by having a small number of parts and easy assembly.

Therefore, an object of the present invention is to eliminate the aspect of electrically connecting an IC and an LCD without using independent parts such as elastic conductive connectors such as zebra connectors, and to reduce the number of parts. It is an object of the present invention to provide an electronic device that allows good electrical connection, is low cost, and has the smallest possible packaging size.

Hereinafter, the present invention will be specifically described in detail using an electronic wristwatch using an LCD as a display body, which is a preferred embodiment of the present invention.

FIG. 1 is a plan view showing a timepiece module, which is the heart of the electronic wristwatch according to the present invention, and FIG. 2 is a longitudinal sectional view taken along the line AA in FIG. In the figure, reference numeral 1 denotes an LCD as a display body, which is electrically connected to electronic components that drive the LCD 1 through its external electrode 1a. 2 is a frame body made of organic resin or the like, which includes an IC 3 as an electronic component for driving the LCD 1, a battery 4, a crystal resonator 5, a trimmer capacitor 6, a chip capacitor 7,
The temperature compensation capacitor 8 and the like are stored in the groove provided in the frame 2, and the external leads 3a to 3 of the IC 3 are connected to each other.
3c is used to electrically connect them to each other. External lead 3a in IC3
A part of ~3c is embedded in the frame 2 and is used as a conductor to be electrically connected to other electronic components 4~9 (9 is a lamp), and is electrically connected to the external electrode 1a of the LCD 1. The connecting part has a shape of a letter (or a bird's beak), and uses the elasticity of the external leads 3a and 3b to make mechanical contact with the external electrode 1a of the LCD 1 to establish an electrical connection. It is something that

As described above, the clock module according to the present invention has a shape (or a bird's beak shape) with external leads 3a and 3b in the IC3 for electrical connection between the LCD 1 and the IC3 as an electronic component that drives it. form a connector and attach an LCD to it.
This is done by inserting the external electrode 1a in 1.

Therefore, the electrical connection between the LCD 1 and the electronic components such as the IC 3 that drives it does not require a single connector such as a zebra connector, nor does it require mechanical pressing force. The arrangement structure does not need to adopt a conventional overlapping structure, and can be in various configurations, such as arranging the IC 3 and LCD 1 horizontally.

LCD 1 according to the present invention and IC 3 that drives it
The connectors 3a and 3b used for electrical connection with electronic components such as IC
Although the external leads 3a and 3b in 3 are used, the present invention is not limited to this, and as shown in other embodiments in FIGS. 3 to 4, various shapes and materials may be used. It can be done.

The present invention is characterized by an electrical connection method between a display such as an LCD and electronic components that drive it, and the effects thereof will be summarized below.

1 For the external leads of the electronic components that drive the display,
It is equipped with a connector into which the external electrode of the display body is inserted. Therefore, there is no need for a single connector such as a zebra connector as in the past. Furthermore, there is no need to apply mechanical pressure to make electrical connections by using a single connector or the like.

Therefore, the present invention has a small number of parts and
Since good ohmic contact can be made, compact and highly reliable electronic devices can be provided.

2. The arrangement of the display body and the electronic components that drive it can be freely arranged.

3. Electrical connections between the external electrodes of the display and the electronic components that drive them are made directly without using other connectors, so ohmic connections are perfect and there are no defects or accidents.

4. The display is easy to attach and detach.

5. The present invention can be applied to various types of electronic devices such as electronic wristwatches and calculators using LCDs, ECDs (Electrochromic Displays), and the like as display bodies.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a timepiece module in an electronic wristwatch that is an embodiment of the present invention, FIG. 2 is a longitudinal sectional view taken along the line AA in FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a plan view showing a timepiece module in an electronic wristwatch, and FIG. 4 is a longitudinal sectional view taken along the line AA in FIG. 1... LCD, 1a... External electrode of LCD, 2... Frame, 3... IC, 3a to 3c... External lead in IC, 4... Battery, 5... Crystal resonator, 6, 7, 8... Capacitor, 9... Lamp .

Claims (1)

[Claims] 1. A functional element having a plurality of protruding external electrodes and an integrated circuit element electrically connected to the functional element, the integrated circuit element itself sandwiching the plurality of protruding external electrodes. An electronic device comprising a lead that is removably connected to the external electrode in an ohmic manner.