JPS5840151B2 - Clock display cell connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fully electronic digital clock circuit using complementary field effect transistors with low power consumption as an electronic circuit, and a connection structure for establishing continuity between display cells such as liquid crystal display cells. It is something.

A liquid crystal watch has been proposed as a display device for an all-electronic watch, and many liquid crystal watches have been proposed.

However, due to the structure of the display cell of a liquid crystal watch, the connection structure for connecting the display segment electrodes and the circuit has been a major problem.

Especially when there are many display segments in a small display area like a wristwatch, the spacing between the display segment electrodes becomes very small, making it impossible to connect conventional electrical components, and at the same time shortening the lifespan of the display cell. Or, due to damage etc., there are conditions such as it must be replaceable.
There has been no structure that satisfies each of these conditions and also provides reliable electrical continuity between the circuit and the display segment electrodes.

The present invention focuses on the above-mentioned points and proposes a connection structure for achieving conduction between a circuit and the electrodes when there are a large number of display segments and the intervals between the external electrodes of the display segments are small.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II in FIG.

In FIG. 2, reference numeral 1 indicates a liquid crystal display cell showing a specific embodiment of the display cell, and a cell external electrode 2 is wired on the mating surface side of the upper glass la and lower glass 1b of the liquid crystal display cell 1, and on both sides. It's out.

3 is a support frame that supports the liquid crystal display cell 1;
The liquid crystal display cell 1 is positioned on the side surface 3a of the machine frame 7, and is positioned by a tube 6 fixed to the machine frame 7.

Reference numeral 4 denotes a display cell holding member that presses down the liquid crystal display cell 1.

5 is a screw for fixing the display cell holding member 4.

8 is a cell connection body. 9 is a circuit board 1 which is an insulating board.
0 and is connected to the electronic circuit 11.

Reference numeral 12 denotes a connection spring for establishing electrical continuity between the cell external electrode 2 and the circuit side electrode 9.

Hereinafter, the structure of the connection part of the above-mentioned liquid crystal watch will be explained in detail.

FIG. 3 is a plan view of the cell connector 8, and 8a and 8b are positioning holes for positioning the cell connector 8.

8C is a groove into which the connection spring 12 is inserted.

Generally, the cell connector 8 is an insulator and is made of a polymeric material such as plastic.

4 is a sectional view taken along the line n-I in FIG. 3, and FIG. 5 is a detailed view of the connection spring 12.

The connecting spring 12 has a loop-shaped cross-sectional shape with an opening 12a on one side as shown in the figure, and can be produced in large quantities at low cost by punching a thin metal plate, for example, a plate with a thickness of about 30 to 300 μm. .

FIG. 6 shows a cross-sectional view of the connection spring 12 fitted into the groove 8c of the cell connection body 8. As shown in the figure, the connection spring 12 is fitted so as to surround the bottom surface 8d of the groove 8c formed above and below. Furthermore, when the connection spring 12 is installed in the groove 8c as shown in FIG. This enables conduction through elastic contact with the

Now, the width of the groove 8C of the cell connection body 8 is set to 200 μm per groove 8d.
The pitch of 400 μm 1 The plate thickness of connection spring 12 150 μm
m, it is possible to contact the liquid crystal display cell 1 with a pitch of 400 μm.

In addition, the dimension C of the insertion side tip of the cell connection body 8 in FIG.
If it is smaller than the dimension e, it can be assembled very easily, and it is also possible to automatically assemble it with a machine.

Furthermore, if the insertion terminal dimension d of the cell connector 8 is made larger than the dimension e of the opening 12a of the connection spring 12, the connection spring 1
It will not come off after installing 2.

FIG. 7 shows a detailed view of part A in FIG. 2, and as shown, there is a connecting spring 12 between the liquid crystal display cell 1 and the circuit board
A cell connection body 8 incorporating a cell connection body 8 is provided.

Moreover, the gap between the liquid crystal display cell 1 and the circuit board 10 is maintained accurately by the thickness of the cell connector 8 in the vertical direction, and the connection spring 12 is kept in contact with the cell external electrode 2 and the circuit side electrode 9. In the state where the bottom part 8d formed above and below
The upper and lower surfaces of the cell connector 8 serve as stopper surfaces to prevent damage and deformation due to excessive deflection of the connection spring 12, and the connection spring 12 always applies appropriate spring pressure to the liquid crystal display cell 1 and It is possible to provide reliable continuity to the circuit board 10.

As described in detail above, if the display cell connection structure of the present invention is used, the connection between the electronic circuit and the display cell is ensured due to the spring contact, and at the same time, the circuit board can be connected to a polyimide film sheet, Alternatively, it may be a printed circuit board, etc., and since the pitch interval of the cell connection body can be reduced, a large number of cell external electrodes of the display cell can be taken out, so the number of display segments can be increased, or If the number of display segments is small, the size of the display cell can be reduced, so a display cell connection structure can be obtained that has many advantages, such as making the clock smaller and making it easier to replace the display cells.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a watch showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, FIG. 5 is a side view of a connection spring used in an embodiment of the present invention, and FIG. 6 is an embodiment of the present invention, in which the connection spring is attached to a cell connection body. The assembled cross-sectional view, FIG. 7, is an enlarged cross-sectional view of section A in FIG. 2. 1...Liquid crystal display cell, 3...Support frame,
8...Cell connection body, 8c...Groove, 8d
...Bottom part, 10...Circuit board, 12
...Connection spring, 12a...Opening, C
...Dimensions of the tip end on the insertion side, d...Dimensions of the end end of the insertion side, e...Dimensions of the opening.

Claims (1)

[Claims] 1 Consisting of a display cell having a display segment, a support member that supports the display cell, a circuit board provided with an electronic circuit, and an elastic metal member for electrically connecting the display cell and the circuit board. It has a cell connection body consisting of a connection spring and an insulating part provided with a pair of upper and lower grooves facing the display cell and the circuit board, respectively, in order to accommodate the connection spring, and the connection spring is arranged between the upper and lower sides of the cell connection body. The connection spring is installed in a pair of grooves so as to partially protrude from the upper and lower surfaces of the cell connection body, and the connection spring has a loop shape that surrounds the bottom of the groove, and one side of the loop shape. The connection spring has a cross-sectional shape with an opening, and the opening dimension e of the connection spring is smaller than the spring insertion side terminal end dimension d of the cell connection body, and is smaller than the spring insertion side tip end dimension C of the cell connection body. A display cell connection structure for a watch, characterized in that the groove is formed in the cell connection body to increase the size, and the cell connection body incorporating the connection spring is disposed between the display cell and the circuit board.