JPS5835488A - Structure of connection of panel with base plate of electronic watch - Google Patents

Abstract

PURPOSE:To reduce the number of parts for connecting a panel to a film-like circuit base plate and thereby to simplify the assembly of a watch, by a method wherein contact patterns at both edges of a liquid-crystal display panel are wrapped in the contact patterns of the circuit base plate, the latter patterns are superposed on the former, and a member of superposition thus prepared is inserted into concave parts of resin members. CONSTITUTION:Contact patterns 4 are extended on the upper surfaces at both edges of the lower panel 2 of a liquid-crystal panel 1. A circuit base plate 5 prepared by forming an electronic circuit pattern 7 on a film-like substrate 6 is arranged on the base side of the panel 1, and contact patterns 8 are extended at both edges of the base plate 5. The panel 1 is wrapped in this base plate 5, and the contact patterns 8 are superposed on the contact patterns 4 to be continuous electrically to the latter. A member of superposition thus prepared is inserted into the concaves 12 and 13 of resin members 10 and 11 and retained by bonding. Therefore, the number of parts requird for connecting the panel to the base plate is reduced and thus the assembly can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electronic watch in which a circuit board for driving the liquid crystal display panel is stacked on the back side of a liquid crystal display panel for displaying time, and the liquid crystal display panel and the circuit board are bonded and held together. Regarding the connection structure.

Conventionally, in this type of connection structure, a contact pattern is exposed on both edges of the back side of a 41 LCD panel, and a conductive rubber is sandwiched between the contact pattern and the contact pattern of a circuit board to establish continuity between them. , the liquid crystal display panel and the circuit board are placed one on top of the other. However, the conventional connection structure has the disadvantage that the number of parts increases and assembly is time-consuming.Therefore, this invention has been developed to The purpose is to reduce the number of parts and simplify assembly in the connection structure between a liquid crystal display panel and a circuit board.

EMBODIMENT OF THE INVENTION Hereinafter, the connection structure according to the present invention will be described in detail based on an embodiment of the present invention shown in the drawings.

The reference numeral 1 in FIG. 1 is a liquid crystal display panel for displaying time. a lower panel 2 of the liquid crystal display panel 1;
It is made larger than the upper panel 3, and both edges protrude from the upper panel 3. A plurality of contact patterns 4 extend on the upper surfaces of both protruding edges.

On the back side of such a liquid crystal display panel 1, a circuit board for driving the liquid crystal display panel is arranged in an overlapping manner.

The circuit board device has an electronic circuit pattern γ'1 formed on the surface of a film-like substrate 6, and a plurality of contact patterns 8 extend from the circuit pattern 7 in both directions.

Furthermore, a switch terminal 9 extends on the side surface.

Then, both edges of the circuit board S are wrapped around both edges of the liquid crystal display panel 1 from the outside, and each contact pattern 8 of the circuit pattern 7 is overlapped with each contact pattern 4 of the panel pattern. Conduct between them. The overlapping portion of the liquid crystal display panel 1 and the circuit board i is formed in a recess txt of a separate resin member 10 or 11, respectively.
or 13, and as shown in FIG. 2, these resin members 10 and 11 sandwich and hold them together. In the illustrated embodiment, a fitting convex portion 14 is formed on one side and a fitting recess @16 is formed on the other side of the opposing portions of both resin members 10-11, and these are fitted and connected.

Note that a circular space 16 is formed in the center of one of the resin members 10, and a battery 17 is housed therein.

FIG. 3 shows another embodiment of this invention. In the embodiment shown in FIG. 3, a slit-shaped positioning recess O is provided in the overlapping portion of the liquid crystal display panel 1B and the circuit board 1@, and a partition wall-like positioning projection is provided in the recess 22 of the resin member 31. When forming two layers and inserting them into the recess 23 which is the overlapping part, positioning (fitting the positioning protrusion 23 into the Bgzo to ensure the relative position of the liquid crystal display panel 18, circuit board 19, and resin member 21) It is designed so that it can be defined as follows.

In the embodiment shown in FIG. 3, the contact pattern 34 of the liquid crystal display panel 1B and the contact pattern 2 of the circuit board 11 are
6, a plurality of pressing protrusions 26 are provided on the circuit board 19 that contacts the resin member 11, and the overlapping portion tW# of the liquid crystal display panel 18 and the circuit board 19 is recessed in the resin member 3.
3, both contact patterns z4・2I! make sure that they are in contact with each other.

Contrary to the embodiment shown in FIG. 3, in the recess of the resin member,
Pressing protrusions are formed corresponding to the positions of both contact patterns,
When the overlapping portion of the liquid crystal display panel and the circuit board is inserted into the recess of the resin member, both contact patterns may be securely brought into contact with each other.

In addition, when a pressing projection is formed on either the resin member or the circuit board, a recess 1 into which the pressing projection fits is formed on the other to ensure reliable positioning and to ensure that both contact patterns are pressed. Even if you do.

According to the present invention, the structure is simple, conductive rubber, mounting screws, etc. are unnecessary, the number of parts can be reduced, and assembly can be simplified.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention, and is a partially exploded perspective view of an electronic timepiece. FIG. 2 is a perspective view showing the assembled state. FIG. 3 is a partial perspective view of an electronic timepiece showing another embodiment of the present invention.
...Circuit board, 4, 8, 24, 3B...Contact pattern, 7...Electronic circuit pattern, 1G-1
1・31・・・Resin member, 1m-IB・3! l・
Mountain: recess, 23: positioning protrusion, 30:
...Positioning recess, 36...Press projection, 1
4...Fitting convex portion, I I! −−−−−・Fitting recess. Patent Applicant Rico Ichitoki Co., Ltd. Agent Patent Attorney Shunsuke Nakao Figure 3 23 = 503

Claims (1)

[Claims] 1. In an electronic watch in which a circuit board for driving the liquid crystal display panel is placed on the back side of a liquid crystal display panel that displays the time, contact patterns are exposed on both edges of the time display side to display the liquid crystal display. When a panel is provided, an electronic circuit pattern is provided on the surface of a film-like substrate to form the circuit board, and both edges of the circuit board are wrapped around both edges of the panel from the outside, and the contact pattern is applied to the panel. A connection structure between a panel and a circuit board of an electronic watch, which is formed by overlapping contact patterns and inserting the overlapping parts into recesses in a resin member to hold them together. 2. The connection structure according to claim 1, wherein a positioning convex portion is formed in one of the overlapping portion and the recess, and a positioning concave portion that fits into the convex portion is formed in the other. 3. Pressing protrusions are provided on either the overlapping portion or the resin member corresponding to the overlapping positions of the contact pattern of the liquid crystal display panel and the contact pattern of the circuit board, respectively. Connection structure described in section. 4. Insert the overlapping parts of the liquid crystal display panel and the circuit board into the recesses of separate resin members. 1. Form a fitting convex part on one of the resin members and a fitting recess on the other, and then The connection structure according to claim 1, in which the fitting convex portion 1sK is enlarged and connected and held.