JPS6339778Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a small electronic device having a display panel, such as a small electronic calculator.

Conventionally, in small electronic devices with display panels, such as small electronic calculators, liquid crystal display cells, solar cells, etc. are once attached to a reinforcing plate, then fixed to an upper case with a display window, and then attached to the upper case. Combined with the lower case. For this reason, in the case of small electronic devices such as those mentioned above, reinforcing plates are required to attach liquid crystal display cells, solar cells, etc., which increases the number of parts, and the reinforcing plates must be manufactured separately. The production is troublesome, and the number of assembly steps increases as the liquid crystal display cell, solar battery cell, etc. are attached to the reinforcing plate, making the assembly work complicated.

This idea was developed in consideration of the above points, and its purpose is to easily and reliably fix display panels such as liquid crystal display cells and solar cells to cases without using reinforcing plates. It is an object of the present invention to provide a small-sized electronic device having a display panel that can be manufactured at low cost by reducing the number of parts and assembly steps.

An embodiment of this invention will be described below based on the drawings. 1 and 2 show a small electronic calculator, in which reference numeral 1 indicates the upper case. A display window 2 and a number of keys 3 are provided on the upper surface of the upper case 1, and a lower case 4 is assembled to the lower part of the upper case 1. This lower case 4 has a liquid crystal display cell 5, a solar cell 6, and a circuit board 7 inside.
etc., and is used to store and secure them. That is, on the inner upper surface of the lower case 4, a display panel stand 8 and a battery stand 9 are provided at a location facing the display window 2 of the upper case 1.
is formed. The display panel stand 8 is for placing the liquid crystal display cell 5 thereon, and is formed into a frame shape having approximately the same outer circumferential shape as the liquid crystal display cell 5, and the battery stand 9 has a solar panel on it. The battery cell 6 is placed thereon, and it is provided adjacent to the display panel stand 8. In this case, since the solar cell 6 is thinner than the liquid crystal display cell 5, the battery stand 9 is formed higher than the display panel stand 8. In addition, notches 10, 10 are formed near both sides of each of these pedestals 8, 9 with a predetermined width in the longitudinal direction of the lower case 4, and the battery pedestals in these notches 10, 10 are formed. Bosses 11 are provided at the end portion on the side 9 and a portion corresponding to the lower side of the circuit board 7 on the extension line on the opposite side, respectively, so as to protrude upward. this boss 1
1... is for positioning and welding a pair of metal leaf springs 12, 12. This leaf spring 12 is arranged along the inside of the notch 10, and has the shape of an elongated strip, and the bosses 1 are provided at both ends of the leaf spring 12.
Holes 13, 13 that fit into holes 1, 11 are formed. Furthermore, elastic pieces 14a and 14b are formed extending in a right angle direction from one side of both ends of the leaf spring 12. These elastic pieces 14a and 14b each extend obliquely upward, and the tip of one of the elastic pieces 14a comes into elastic contact with an electrode provided on the lower surface of the solar cell 6, and the tip of the other elastic piece 14b comes into contact with the circuit board 7.
The photovoltaic cell 6 and the circuit board 7 are electrically connected to each other by making elastic contact with an electrode provided on the lower surface of the photovoltaic cell 6 . Furthermore, the leaf springs 12, 12
When arranged along the inside of each notch 10, 10,
The band plate-like portion is designed not to protrude above the upper surfaces of the display panel stand 8 and battery stand 9.
As a result, the entire upper surface of the display panel stand 8 and the entire upper surface of the battery stand 9 become flat, and each of these stands 8, 9
A liquid crystal display cell 5 and a solar battery cell 6 are attached thereon via double-sided adhesive tapes 15, 15 and 16. That is, the liquid crystal display cell 5 is fixed to the top surface of the display panel stand 8 with double-sided adhesive tapes 15, and the solar battery cell 6 is fixed to the top surface of the battery stand 9 with double-sided adhesive tape 16. There is.

On the other hand, a large number of keys 3 provided in the upper case 1
Legs 17 on which the four corners of the circuit board 7 are placed are formed on the lower case 4 at locations facing the legs 17 . The legs 17 have a cylindrical shape, and a through hole 18 penetrating from the top surface to the bottom surface of the lower case 4 is formed in the center of each leg portion 17 . This through hole 18...
Screws 19 are inserted into the interior from below, and the inserted screws 19 protrude upward from each leg 17, and these protruding portions connect the mounting holes 7a formed at the four corners of the circuit board 7. It is designed to be screwed onto the upper case 1. Therefore, the above screw 19...
As a result, the lower case 4 is attached to the upper case 1, and the circuit board 7 is also fixed at the same time.
In this case, the circuit board 7 and the liquid crystal display cell 5 are electrically connected by a flexible connector 20.

Next, the case of assembling the above-mentioned small electronic calculator will be explained. First, the leaf spring 12,
12 is placed along the inside of the notches 10, 10, and the bosses 1 are placed in the holes 13, 13 formed at both ends of the notches 10, 10.
1... is inserted, the boss 11... is melted, and the leaf springs 12, 12 are welded. After that, attach the double-sided adhesive tapes 15, 15 to the upper surface of the display panel stand 8,
While fixing the liquid crystal display cell 5 connected in advance to the circuit board 7 by the flexible connector 20,
The solar cell 6 is also fixed to the upper surface of the battery stand 9 via a double-sided adhesive tape 16. Then, as shown in FIG. 2, the liquid crystal display cell 5, the solar cell 6, and the circuit board 7 are housed in the lower case. At this time, each elastic piece 14a, 1 of the leaf spring 12, 12
4a comes into elastic contact with the electrode provided on the lower surface of the solar cell 6, and the other elastic pieces 14b, 14b come into elastic contact with the electrode provided on the lower surface of the circuit board 7, thereby causing the solar cell 6 and the circuit board 7 to are electrically connected. Thereafter, the screws 19 are inserted into the through holes 18 from the lower side of the lower case 4, passed through the mounting holes 7a formed in the circuit board 7, and screwed into the upper case 1. Thereby, the lower case 4 is attached to the upper case 1, and the circuit board 7 is also fixed at the same time.

In this way, according to the above-mentioned small electronic calculator,
Since the liquid crystal display cell 5 and the solar cell 6 are attached to the lower case 4 with double-sided adhesive tapes 15, 15, 16, they can be fixed easily and reliably, and the liquid crystal display cell 5 can be attached directly to the lower case 4.
Since the solar cell 6 is fixed, there is no need for a reinforcing plate as in the conventional case, the number of parts and assembly steps are reduced, and the product can be manufactured at low cost.

In addition, in the above embodiment, a case was explained in which a display panel such as a liquid crystal display cell 5 or a solar cell 6 was used, but the present invention is not limited to this, and a display panel such as an electrochromic display panel may be used. It may be hot.

Furthermore, this invention is not limited to the above-mentioned small electronic calculator, but can be widely applied to electronic equipment having a display panel.

As explained above, according to the small electronic device having the display panel according to the present invention, the display cell and the battery cell are bonded to the exterior case with double-sided adhesive tape, and the battery cell is attached to the board welded to the exterior case. Since it is electrically connected to the circuit board using a spring, it can be fixed easily and reliably, eliminating the need for separate parts such as reinforcing plates, reducing the number of parts and assembly steps, and making small electronic devices cheaper. It has the advantage of being able to be manufactured to

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a small electronic calculator according to this invention, and FIG. 2 is an exploded perspective view of a liquid crystal display cell, a solar battery cell, and a circuit board housed in a lower case. DESCRIPTION OF SYMBOLS 1... Upper case, 2... Display window, 4... Lower case, 5... Liquid crystal display cell, 6... Solar battery cell, 7... Circuit board, 15, 16... Double-sided adhesive tape.

Claims (1)

[Scope of utility model registration request] The display cell electrically connected to the circuit board is adhered to the exterior case of the device main body with double-sided adhesive tape, and the battery cell is adhered to the exterior case with double-sided adhesive tape, and the circuit board and the battery cell are A small electronic device having a display panel electrically connected by a leaf spring welded to an exterior case.