JPS647589Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrical device having a structure in which an electrode of a ground line provided on an electronic circuit board is crimped onto a conductive coating for shielding applied to the inside of an outer case.

In conventional electrical devices, conductive paint, plating, etc. are applied to the inside of the outer case to protect the electronic circuits when housing the electronic circuit boards such as ICs. However, since lead wires and leaf springs are used to connect the conductive paint for the shield to the earth line electrode, the structure is complicated and it is difficult to assemble.

The purpose of the present invention is to solve the drawbacks of conventional electrical devices and to provide an electrical device that is easy to assemble.

Hereinafter, the present invention will be explained based on an embodiment using a camera data imprinting device as an example of an electric device.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

In FIGS. 1 and 2, numbers 1 to 5 are omitted for convenience.

FIG. 1 shows a data imprinting device that incorporates an electronic clock, externally displays clock output such as year, month, date, date, hour, and minute on a liquid crystal display, and imprints it onto a film using a light emitting diode (LED).

In FIG. 1, the back cover 7 has rising portions 7a, 7.
b, 7c are provided protrudingly. The film pressure plate 8 is
The shafts 9a, 9b, 9c protruding from the pressure plate are inserted into the rising portions 7a, 7b, 7c to prevent them from coming off, and springs are respectively disposed between the rising portions 7a, 7b and the film pressure plate 8. 10a, 10
b, and a spring (not shown) disposed between the rising portion 7c and the pressure plate 8 so as to be movable back and forth relative to the back cover. A liquid crystal board 12 for externally displaying data and an LED board 13 for imprinting data onto a film are arranged on the top side of the printed board 11, and a liquid crystal board 12 and an LED board 13 on the back side.
An IC (not shown) for driving is arranged. Seven-segment LEDs for six digits are installed on the back side of the LED board 13, and these LEDs display data such as year, month, day, date, hour, and minute. This emitted light passes through the lens 14, the aperture 15, and the hole 8a provided in the film pressure plate 8, and forms an image on the back side of the film. The printed circuit board 11 is a film pressure plate 8
Screw 1 to the shafts 16a, 16b, 16c set up in
7a, 17b, and 17c. The liquid crystal display panel 12 can be observed through the hole 18a of the outer case 18. Three holes 18b', 18
button 19 slidably inserted into b″, 18b
a, 19b, and 19c are used for switching and modifying data, and each has a return spring 20.
When the button is pressed against the buttons a, 20b, and 20c, its tips deform the conductive contact springs 21a, 21b, and 21c attached to the printed board 11. And each contact spring is an electrode 11a',
11a" and 11a, and works as a switch. A dial 22 rotatably attached to the outer case 18 is a switching dial for changing the light emission time of the data imprinting LED according to the film sensitivity. A brush (not shown) is configured to slide on an electrode 11b provided on the printed board 11.

Flexible printed circuit board (FPC) 2
3 is attached to the back cover 7. The electrodes 23a and 23b provided on the FPC 23 are for taking out the power supply voltage, and each is connected to a 1.5V battery 24.
Contact springs 25, 26, 27 in contact with a, 24b
One end of 25 of them is 23a, and one end of 27 is 23a.
b, respectively, and a voltage of 3V can be extracted. 26 and 26a are for connecting two batteries in series and are composed of one leaf spring. This connection relationship will be explained with reference to FIG. The electrode 23a is connected to the battery 2 via the contact spring 25.
It is connected to the positive electrode of 4a. Further, the negative electrode of the battery 24a is connected to the leaf spring 26, and is also connected to the positive electrode of the battery 24b via its rising portion 26a. On the other hand, the electrode 23b is connected to the negative electrode of the battery 24b via the contact spring 27. Therefore, a voltage of 3V can be extracted between the electrodes 23a and 23b. In addition, the contacts 23a, 23b and the leaf spring 2
A voltage of 1.5V can also be taken out between each terminal and 6.

The electrode mark 23a drawn on the FPC 23 indicates the direction of battery insertion. This pattern is case 18
It is located on the bottom of the battery compartment in a position that can be seen from the outside. The position of the FPC 23 is regulated by passing a shaft 28 attached to the back cover 7 through the hole 23d for positioning the FPC 23. Further, an electrode of the ground line is exposed around the hole 23d, and by soldering this electrode to the shaft 28, it is possible to connect the back cover 7 to the ground line. 23e
This is an electrode for the ground line. This is used to connect the conductive paint for shielding applied to the inside of the outer case 18 (not shown) to the ground line. When the outer case 18 is attached to the back cover 7, the conductive paint is connected to the ground line. The coating surface is configured to be pressure-bonded to the electrode 23e. One end of the FPC 23 is pasted to the film pressure plate through a portion 23f, and the other end is pasted to the inside of the outer case 18 through a portion 23g, forming a necessary circuit.

FIG. 2 is a sectional view of the battery storage section of FIG. 1.
Parts corresponding to those in FIG. 1 are given the same numbers. In the figure, 23h is the base film of FPC,
23i is an FPC electrode (pattern) made of copper foil or the like. 23j is a cover film for covering the electrode, and 23h to 23j form the FPC 23.
The contact spring 27 is guided to the electrode 23i via the convex portion 27a and connected to a necessary circuit.

Next, the structure of the battery storage section will be explained in more detail. In FIG. 2, a female screw 30 is integrally molded in a part of the case 18.
The upper end surface of the case 18 is disposed slightly lower than the upper end surface of the case 18. Therefore, a stepped portion 31 is formed between the upper end surface of the female screw and the upper end surface of the case 18. A locking plate spring 32 is fixed to the battery cover 6.
A protrusion 32a is provided at its free end. To close the battery cover 6, push the cover 6 downward from the left to the right in the figure. At this time, the protrusion 32a of the leaf spring 32 passes over the case 18 from left to right and enters the stepped portion 31. At this time, the lid 6 can be locked if the lid 6 is fitted with a vertical retainer 33 (shown in the first figure).

As described above, according to the configuration of the present invention, the ground line electrode is provided on the part of the electronic circuit board that faces the surface coated with conductive paint on the inside of the outer case, and when the outer case is attached to an electrical device, the conductive paint Since the attached surface is crimped to the electrode of the ground line, the structure is simple and easy to assemble.

Furthermore, since the conductive coated surface of the outer case is directly connected to the ground line electrode on the circuit board, reliability is also high.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of a data imprinting device for a camera used as an example of the electric device of the present invention, and FIG. 2 is a sectional view of the battery storage section of FIG. 1. Explanation of symbols of main parts, 18... Outer case, 7
...Back cover, 23...Flexible printed circuit board, 23e...Earth line electrode.

Claims (1)

[Claims for Utility Model Registration] A device that has an electronic circuit board such as an IC inside, an outer case that houses the electronic circuit board, and a shield that protects the electronic circuit on the board inside the case. In an electrical device coated with a conductive paint, an earth line electrode is provided on a portion of the electronic circuit board facing the conductive paint coated surface inside the outer case, and when the outer case is attached to the electrical device. An electrical device characterized in that the surface coated with the conductive paint is crimped to the electrode of the ground line.