JPH0119165Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small lamp mounting structure that facilitates positioning and mounting of a lamp in a small electronic device.

Conventionally, in small electronic devices such as electronic watches,
A lamp with a filament built into a glass tube is used to illuminate the LCD panel in the dark.When installing this lamp, since it is very small, a special jig for the lamp installation must be made to position the lamp. The body was fixed and attached to a circuit board or other component inside the device.

However, this kind of installation requires making a jig for fixing the lamp guide, which is time-consuming and does not improve work efficiency very much.

This invention was devised in order to eliminate the above-mentioned drawbacks, and the purpose is to obtain a small lamp mounting structure that does not require a jig for fixing the lamp guide and allows for accurate lamp mounting position. do.

An embodiment of the present invention will be described below as shown in the accompanying drawings.

This embodiment is a liquid crystal display type electronic wristwatch, and is composed of the following components.

That is, the wristwatch of this embodiment includes a liquid crystal panel 1 for displaying the time or other text information, a panel frame 2 for guiding and holding this liquid crystal panel, and a panel frame 2 arranged over the liquid crystal panel 1. a circuit board 4 arranged parallel to the reflection plate and held by the panel frame 2; and a battery frame for storing batteries 6 which are further stacked on the top surface of the circuit board 4. It has a so-called laminated structure consisting of 5.

The liquid crystal panel 1 consists of upper and lower glass plates 11 and 12 that sandwich a nematic liquid crystal, and the glass plate 1.
It is composed of polarizing plates 13 and 14 which are stacked on the upper and lower surfaces of polymers 1 and 12, and electrical signals are transmitted through a connector (not shown) by the circuit configuration mounted on the circuit board 4. It is driven by being sent.

The reflecting plate 3 is a reflecting plate for reflecting light that enters into the liquid crystal panel 1 from the direction of arrow A on the lower surface of the liquid crystal panel 1 (in the figure), and thereby,
It acts so that letters, numbers, etc. displayed on the liquid crystal panel 1 can be clearly seen.

The panel frame 2 is molded from a material such as plastic, and surrounds the liquid crystal panel 1 and the polymer of the reflective plate 3, and has an L-shaped section 21 in the lower opening in the figure. The outer peripheral portion of the liquid crystal panel 1 is adapted to engage with this stepped portion 21.

The circuit board 4 is attached to the flat part 2 of the panel frame 2.
2, and on this board 4, the circuitry necessary for the operation of the timepiece is formed (not shown) as described above. A lamp 7 for illuminating the liquid crystal panel is attached to the circuit board 4 so that the lamp body 71 is disposed in the inverted L-shaped section 15 formed by the liquid crystal panel 1 and the reflection plate 3. There is. In this case, the lamp body 71 is formed from a glass tube 71a and a filament 71b disposed in the glass tube 71a, and from both ends of the filament 71b are electrodes made of metal wire for mounting on a circuit. foot 71
c, 71c are attached. This electrode foot 7
1c, 71c are mounted on the lamp mounting patterns 41, 41 on the circuit board 4 by fixing means such as soldering.

In this case, when the lamp 7 is mounted as shown in FIG. The electrode legs 71c, 71c are bent at right angles at the portions corresponding to the lamp attachment patterns 41, 41, and the ends of the electrode legs 71c, 71c are fixed with solder as described above.

The battery frame 5 has a push-up pin 51 for pushing up the lamp body 71 that is inserted into the lamp guide hole 42 when superimposed on the circuit board 4. As a result, the lamp body 71 is pushed up to the inverted L-shaped section 15 and positioned. In this case, the electrode legs 71c, 71c of the lamp are bent by a predetermined angle α.

In the above configuration, when the lamp is turned on in a dark place, the light from the lamp passes through the interior of the reflecting plate and illuminates the liquid crystal panel.

According to the configuration of the present invention, a lamp guide hole is provided at the lamp mounting position of the circuit board, and after the lamp body is guided and mounted in this hole, the lamp body is pushed up to the side of the reflector using a push-up pin and positioned. As a result, the lamp can be mounted and held without requiring a jig or the like to hold the lamp.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partial vertical sectional view of an electronic wristwatch, and FIG. 2 is a partial plan view of a circuit board. 1...Liquid crystal panel, 2...Panel frame, 3...Reflector, 4...Circuit board, 5...Panel frame, 51...
...Push-up pin, 7...Lamp, 42...Lamp guide hole.

Claims (1)

[Scope of utility model registration request] A liquid crystal panel having a reflector, a panel frame that supports the liquid crystal panel, a battery that supplies driving energy to the liquid crystal panel, the battery and a circuit board,
A battery frame that supports a panel frame is provided, and a lamp for illuminating the liquid crystal panel is provided on a part of the circuit board, and a stepped part for arranging the lamp is provided on one side of the outer periphery of the liquid crystal panel, and a battery frame is provided on one side of the outer periphery of the liquid crystal panel. A compact lamp mounting structure for a compact electronic device, characterized in that a push-up pin for supporting the lamp is provided on the frame, and the push-up pin holds the lamp within a stepped portion of a liquid crystal panel.