JPS5843001Y2 - Structure of the display section of an electronic watch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a display section of an electronic wristwatch that digitally displays the time on a liquid crystal display and is equipped with an illumination device.

Some wristwatches that display the time using a liquid crystal are equipped with an illumination device that brightens the time display element of the liquid crystal display by applying illumination light to the liquid crystal display, making it easy to display the time at night or in dark places. The time display on the liquid crystal display is clearly visible and very convenient.

Conventionally, the structure of the display section of this type of electronic wristwatch is shown in Figure 1a.
, l), the liquid crystal display A, the interconnector B
, a printed circuit board C is provided in a layered structure and is individually defined by a presser cover D, and an illumination lamp F as an illumination body is provided in the four parts or holes E formed in the printed circuit board C located below the liquid crystal display A. A diffuser plate G (consisting of a light transmitting plate H and a reflecting plate I) is interposed between the liquid crystal display A and the printed circuit board C, and the light from the illumination lamp F is directed to the diffuser plate G.
The structure is such that the light beam is diffused and irradiated onto the liquid crystal display body A.

However, with such a configuration, the illumination lamp F
is provided below the liquid crystal display A, so storage space for the illumination lamp F is required in the thickness direction of the wristwatch.If the diameter of the illumination lamp F is increased, the thickness of the wristwatch increases, so the thickness of the wristwatch is set to be smaller. This limits the diameter of the illumination lamp.

Further, in order to secure a storage space for the illumination lamp F, four parts or holes may be formed in the printed circuit board C, and in this case, there are disadvantages such as the necessity of processing the printed circuit board C.

The present invention was developed in view of the above circumstances, and is an electronic wristwatch that can set the diameter of the illumination body to a predetermined size without increasing the thickness of the entire device, and that has simple configurations of each component and is easy to assemble. It provides the structure of the display section.

Hereinafter, an embodiment of the present invention will be described with reference to drawings.

1 in FIGS. 2 and 3 is a rectangular flat liquid crystal display body, on which a time display element 2 consisting of an hour display element 2a and a minute display element 2b is formed, and there is a gap between layers on both sides. a stepped portion 3 having a plurality of electrodes (not shown) arranged in parallel;
, 3 are formed.

In this liquid crystal display 1, electrodes are formed only on both sides and not on both ends, and the time display element 2 is formed along both ends, and the hour display element 2a is located on the left end side in the figure. At the same time, the minute display element 2b is displayed located at the right end side in the figure.

Therefore, the left end of the liquid crystal display 1 in the figure has no electrode, and becomes the display side end where the hour display element 2a is displayed.

In the figure, reference numeral 4 denotes an ink connector which is a frame provided below the liquid crystal display 1, and is made of insulating synthetic resin to connect the liquid crystal display 1 and the diffusion plate 1 It is shaped like a rectangular frame having a storage opening for storing the liquid crystal display 1, and a plurality of electrodes 5 made of conductive rubber are provided on both sides facing and engaging with the stepped portions 3, 3 of the liquid crystal display 1.
. . . , 5 . . . are arranged in parallel at intervals, and these electrodes 5 . . .

5... are in contact with a plurality of electrodes arranged in parallel on the step portions 3, 3, respectively, facing each other.

Holding pieces 6 are formed at the four corners of the liquid crystal display 1 mounting portion of the ink connector 4, and these holding pieces 6...
Hold the liquid crystal display 1 by pressing the four corners of the liquid crystal display 1.

Further, at the left end of the ink connector 4 in the figure, that is, at the end opposite to the display side end where the hour display element 2a is displayed in the liquid crystal display 1, there is a fitting notch 7 into which an illumination lamp 12, which will be described later, is fitted. It is formed.

In the figure, reference numeral 8 denotes a printed circuit board which is provided below the ink connector 4 and has a circular shape corresponding to the shape of a wristwatch.
. . , 5 . . . and facing the electrode 5 .
..., 5..., a plurality of electrodes 9..., 9... are arranged in two rows with a gap between them. It's a formality.

This printed circuit board 8 has electrodes 10 for connecting illumination lamps and mounting holes 11.

In this way, the liquid crystal display 1, the ink connector 4, and the printed circuit board 8 are provided in an overlapping layer structure.

In the figure, reference numeral 12 denotes an illumination lamp as an illumination body, which is located on the left side of the liquid crystal display 1, that is, on the side of the display side end of the hour display element 2a, and is fitted into the fitting notch 7 of the ink connector 4. They are also provided on the printed circuit board 8.

This illumination lamp 12 has a lead wire 13 connected to and held by an electrode 10 of a printed circuit board 8, and an ink connector 4.
It is held by the fitting notch 7 of.

In the figure, 14 is a rectangular plate-shaped diffusion plate provided between the ink connector 4 and the printed circuit board 8, and this is an upper light transmitting plate 15 (the upper surface of the light transmitting plate 15 faces from the left end to the right end The lower reflector plate 16 is stacked on top of the lower reflector plate 16.

This diffusion plate 14 is arranged facing the lower surface of the liquid crystal display 1 in a space surrounded by the rectangular frame portion of the ink connector 4, and its left end portion is fitted into the fitting notch 7 of the ink connector 4. It is connected to an illumination lamp 12 provided on a printed circuit board 8.

In the figure, reference numeral 17.17 denotes a pair of holding covers having mounting holes 18.18, which are used to hold both sides of the liquid crystal display 1 and ink connector 4 and fix them on the printed circuit board 8. , a holding piece 17 a that holds both ends of each of these parts.
, 17a are formed.

In the figure, reference numeral 19.19 is a mounting screw for fixing the holding cover 17.17 onto the printed circuit board 8.

When assembling this display unit, the liquid crystal display body 1, ink connector 4, and diffusion plate 14 are stacked on the top surface of the printed circuit board 1 in this order from above, and the pair of holding covers 17 and 17 are used to display the liquid crystal display. The pair of holding covers 17 and 17 are placed on the printed circuit board 8 on both sides of the display body 1 to hold each part from the top surface of the liquid crystal display body 1.
8.18 and the mounting screws 18.18 are screwed into the mounting holes 11.11 of the printed circuit board 8 and fixed onto the printed circuit board 8.

The illumination lamp 12 is fitted into the fitting notch 7 of the ink connector 4 and placed on the upper surface of the printed circuit board 8, and the lead wire 13 is connected to the electrode 10 of the printed circuit board 8.

In addition, in this display section, when the illumination lamp 12 is turned on to illuminate the liquid crystal display 1, this illumination light enters the interior from the left end of the diffuser plate 14, and is reflected by the reflector plate 16 at the diffuser plate 14. By passing through the light transmitting plate 15 upward, the light is diffused over the entire surface and illuminates the liquid crystal display 1 from below.

Therefore, the liquid crystal display 1 is illuminated by the illumination light from the illumination lamp 12, and the time display element 2 is brightly illuminated and can be clearly seen.

In this case, the illumination lamp 12 is provided on the side of the display side end of the display element 2a of the liquid crystal display 1.
When the liquid crystal display 1 is close to the illumination lamp 12, the irradiation light irradiated in a fan shape from 2 at a predetermined irradiation angle irradiates the display element 2a with the brightest illuminance.

Therefore, the hour display element 2a is displayed most brightly and clearly.

However, in the structure of the display section of this electronic wristwatch,
A synthetic resin type structure in which a liquid crystal display, a diffusion plate, and a printed circuit board are arranged in a stacked manner, and a storage opening for storing the liquid crystal display and the diffusion plate and a holding piece for holding and positioning the side of the liquid crystal display are formed. A lighting body storage notch is formed in the frame body to be located on the side of the diffuser plate, and the lighting body attached to the printed circuit board is placed in this lighting body storage notch, so that the liquid crystal display 1 , the diffusion plate 14, the ink connector 4, etc., and there is no need to provide storage space in addition to the thickness of the liquid crystal display 1, the diffusion plate 14, and the ink connector 4.

Therefore, even if the lighting lamp 12 is provided, the thickness of the wristwatch does not increase, and the lighting lamp 12 can be provided with a diameter of the required size, and the diameter of the lighting lamp 12 is limited by the thickness of the wristwatch. It is possible to prevent the size of the wristwatch from becoming smaller, and it is possible to use the illumination lamp 12 while making the wristwatch thinner.

Further, since the illumination lamp 12 is provided on the side of the liquid crystal display 1, it can be provided on the upper surface of the printed circuit board 8.
The printed circuit board 8 does not require any processing for attaching the illumination lamp 12.

In addition, the illumination lamp 12 is attached to the printed circuit board 8 on the side of the liquid crystal display 1 separately from the structure in which parts such as the liquid crystal display 1 and the ink connector 4 are attached to the printed circuit board 8. There is no need to remove the liquid crystal display 1 or the ink connector 4 during removal and installation in the event of a failure, etc., and the mounting structure is simple and handling is easy.

Furthermore, since the illumination lamp 12 fits into the notch 7 of the ink connector 4, which is a frame, it can be easily placed in a predetermined position and held securely during installation.

Note that the illumination body is not limited to the illumination lamp 12 and may be other things such as a light emitting diode, and the diffusion plate is not limited to something like the diffusion plate 14. The method is not limited to the embodiments described above, and can be implemented with various modifications without changing the gist thereof.

As explained above, the structure of the display section of the electronic wristwatch of the present invention is as follows: a liquid crystal display, a diffusion plate, and a printed circuit board are arranged in a stacked manner, and there is a storage opening for storing the liquid crystal display and the diffusion plate, and a side of the liquid crystal display. A lighting body storage notch is formed on the side of the diffuser plate in a synthetic resin frame having a holding piece for holding down and positioning the part, and a lighting body storage notch is formed on the printed circuit board in this lighting body storage notch. Since the attached lighting body is arranged, it is possible to use a lighting body of a predetermined size without increasing the thickness of the watch itself, and it is possible to perform rational and effective lighting, and to The component mounting structure is simple, the mounting work is easy, and the positioning of the frame and the illumination body is easy.

[Brief explanation of drawings]

1a and l) are a plan view and a sectional view showing the structure of a display section of a conventional electronic wristwatch, respectively; FIG. 2 is an exploded perspective view showing an example of the structure of a display section of an electronic wristwatch according to the present invention; FIGS. 3a and 3l) are also a plan view and a sectional view. 1...Liquid crystal display body, 4...Interconnector, 5...electrode, 6...pressing piece, 7
......Fitting notch, 8...Printed circuit board, 12...Illumination lamp (illumination body), 14...
...Diffusion board.

Claims (1)

[Scope of utility model registration request] A flat liquid crystal display body having at least an hour display element section and a minute display element section for digitally displaying hours and minutes, a printed circuit board provided with an electronic circuit for driving this liquid crystal display body, and this printed circuit board. A structure of a display section of an electronic wristwatch including a diffuser plate provided between the liquid crystal display body and an illumination body mounted on the printed circuit board, and a holding piece for positioning a side part of the liquid crystal display body. and,
A frame made of synthetic resin includes an opening for housing the liquid crystal display and the diffusion plate, and a lighting body storage cutout formed on the side of the opening for housing the lighting body on the printed circuit board, A structure of a display section of an electronic wristwatch, in which a lighting body mounted on the printed circuit board is arranged in a lighting body storage notch of the frame body, and light is emitted from the side of the diffusion plate.