JPH06159331A - Parts connecting method - Google Patents

Abstract

PURPOSE:To enable cost reduction of a device and the effective use of resources to be attempted effectively by easily disassembling the device in a process of using shape memary alloy, and promoting reuse and recycle of the parts. CONSTITUTION:This parts connecting method is applied to a key board of an electronic computer and comprises a verticoly moving cover of the key board key top 2, and a base plate 3 on which a control circuit and a key switch 5 are placed. When the key top 2 is fixed to the key switch 5 on the bases plate 3, the shape wherein a scratch 2a is deformed in its releasing direction in preheating is stored in the scratch 2a made of shape memory alloy, of the key top 2, thereby the key top 2 is fixed to the key switch 5 by scratching method. On the other hand, in disassembling, the key top 2 is turned over, the scratch 2a of the key top 2 is deformed in its releasing direction, only by being heated so that the key top 2 can be released from the key switch 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for connecting parts,
Especially in general devices that connect multiple parts together,
The present invention relates to a technique effectively applied to a component connection method in which a device can be easily disassembled by using a shape memory alloy.

[0002]

2. Description of the Related Art Conventionally, in an apparatus for connecting a plurality of parts, as a method of connecting the parts, screwing, scratching, adhesive or the like is generally used. If it is done, it is a connection method that takes time to disassemble.

For example, keyboards, electronic calculators, televisions, audio devices, etc., which have a large number of parts, can be used as the connection methods.

[0004]

However, in the prior art as described above, in an apparatus constructed by combining a plurality of parts, the parts are generally fixed by screwing, scratching, etc. There is a problem that disassembly cannot be easily performed during processing, and reuse and recycling of each component cannot be performed sufficiently.

Therefore, an object of the present invention is to connect parts by facilitating the disassembly of the device by using the shape memory alloy, promoting the reuse and recycling of the parts, and reducing the cost of the device and effectively utilizing the resources. To provide a method.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0007]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

That is, the parts connecting method of the present invention is a parts connecting method for an apparatus composed of a plurality of parts, wherein each of the plurality of parts is connected using a shape memory alloy,
For this shape memory alloy, a shape is preliminarily memorized so that each connection between a plurality of parts is disconnected when heated.

[0009]

According to the above-described component connection system, the shape memory alloy, which is memorized in such a shape that each connection is disconnected when heated, is used for each connection between a plurality of parts, so that it is necessary to disassemble the device. In the case of occurrence of the above, heating of the entire apparatus disconnects the connection between a plurality of parts at once, and the apparatus can be easily disassembled.

Thus, for example, when component parts of the apparatus are disposed of as waste products, it becomes easy to reuse usable parts and recover parts having the same material, and it becomes possible to recycle parts.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded schematic view showing a case where a parts connection system according to an embodiment of the present invention is applied to a keyboard, and FIG. 2 shows a key top substrate by scratching using a shape memory alloy in this embodiment. FIG. 3 is a cross-sectional view of a key top showing a method of fixing the keyboard to the upper switch, and FIG. 3 is a keyboard cover showing the method of fixing the upper cover, the lower cover, and the board of the keyboard by scratching using a shape memory alloy. FIG.

First, referring to FIG. 1, a schematic structure of a keyboard to which the parts connecting system of this embodiment is applied will be described.

The keyboard of this embodiment is applied to, for example, a keyboard having a large number of parts, which is an input device of an electronic computer, and is a board on which an upper cover 1 of the keyboard, a key top 2, a control circuit of the keyboard, and a key switch are mounted. 3 and a lower cover 4 of the keyboard, and a scratch fixing method using a shape memory alloy is used for connecting each of these components.

Next, regarding the operation of the present embodiment, when the key top 2 is fixed to the key switch 5 on the board 3 as shown in FIG. 2, the upper cover 1, the board 3 and the bottom of the keyboard are arranged as shown in FIG. A case where the covers 4 are fixed will be described.

First, in this embodiment, all the above-mentioned parts are fixed by scratching, and a shape memory alloy is used for the scratching part.

First of all, as shown in FIG.
In the connection method of fixing to the above key switch 5, the key top 2 is fixed by the same scratching method as in the conventional case, but a characteristic is that a shape memory alloy is used for this scratching portion.

That is, the scratches 2a made of the shape memory alloy are stored in advance with a shape which is deformed in the direction in which the scratches 2a made of the shape memory alloy are disengaged when heated, and then, as shown in FIG. 2 (a). 2 is fixed to the key switch 5 on the substrate 3 by a scratch method.

When the key top 2 and the key switch 5 are disassembled, the key top 2 is turned upside down and heated, and the scratch 2a made of the shape memory alloy of the key top 2 is deformed in the direction to come off as shown in FIG. 2 (b). By doing so, the key top 2 can be detached from the key switch 5 and dropped naturally.

Also, when fixing the upper cover 1, the substrate 3 and the lower cover 4 of the keyboard, the upper cover 1 and the substrate 3 are similarly scratched by the shape memory alloy of the lower cover 4 as shown in FIG. 3 (a). 4a and the substrate 3 are fixed by the scratches 3a made of a shape memory alloy, so that the keytop 2 can be turned upside down and heated as in the case of the keytop 2.
As shown in (b), the scratches 4a and 3a made of the shape memory alloy can be deformed in the disengaging direction to facilitate the disassembly.

That is, at the time of assembly, the shapes that deform the scratches 2a, 3a, 4a made of the respective shape memory alloys are deformed in the detaching direction in advance and memorized, and the key top 2, the substrate 3, and the upper cover 1 are fixed in order. Then, when disassembling, if the keyboard is turned upside down and the lower cover 4 is fixed and heated while applying some vibration, the key top 2, the substrate 3 and the upper cover 1 all come off naturally and fall.

After the disassembly, the upper cover 1, the key tops 2, and the lower cover 4 usually regenerate the material as plastic because they are dirty or damaged, while the substrate 3 is the upper cover 1 and the lower cover 4. Since it is protected from damage, it can be reused as a part and can be reused as a part of a keyboard of the same product.

Therefore, according to the keyboard to which the component connecting system of this embodiment is applied, the key tops 2,
The scratches 2a, 3a, 4a of all the shape memory alloys of the substrate 3 and the lower cover 4 are preheated and memorized with the shapes that are deformed in the detaching direction. Is no longer necessary, and it can be easily disassembled by simply turning it upside down and heating it. This makes it easy to reuse each part as a part and as a material.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, with respect to the keyboard of this embodiment, the case where the scratches 2a, 3a, 4a made of the shape memory alloy are formed on the key top 2, the substrate 3 and the lower cover 4, respectively, has been described. However, the present invention is not limited to the example, and is also applicable to the case where scratches made of a shape memory alloy are formed on the key switch, the lower cover and the upper cover.

Further, the case of fixing by the scratching method using the shape memory alloy has been described, but it is also applicable to various other fixing methods such as the fitting method by utilizing the shape change of the shape memory alloy. There is no end.

In the above description, the case where the invention made by the present inventor is mainly applied to the component connecting system used for the keyboard which is the input device of the electronic computer which is the field of application thereof has been described, but the invention is not limited thereto. However, the present invention can be widely applied to other devices such as a television and an audio device which are configured by connecting a plurality of parts.

[0027]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.
It is as follows.

That is, each connection between a plurality of parts is performed using a shape memory alloy, and for this shape memory alloy,
By storing in advance the shape in which each connection between a plurality of parts is disconnected during heating, if the device needs to be disassembled, it can be easily disassembled by heating the entire device. In addition, it is possible to easily reuse the components that make up the apparatus, and reuse as the material, and it is possible to recycle the components.

As a result, particularly in an apparatus constituted by connecting a plurality of parts, the parts connecting method enables reduction of the apparatus cost, effective use of resources and reduction of the disposal cost of the apparatus by the connecting method using the shape memory alloy. Can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded schematic view showing a case in which a parts connection system according to an embodiment of the present invention is applied to a keyboard.

FIG. 2 is a cross-sectional view of a keytop showing a method of fixing the keytop to a switch on a substrate by scratching using a shape memory alloy in this example.

FIG. 3 is a cross-sectional view of a keyboard cover and a substrate showing a method of fixing an upper cover, a lower cover and a substrate of a keyboard by scratching using a shape memory alloy in the present embodiment.

[Explanation of symbols]

 1 Upper cover 2 Key top 2a Scratch with shape memory alloy 3 Substrate 3a Scratch with shape memory alloy 4 Lower cover 4a Scratch with shape memory alloy 5 Key switch

Claims (1)

[Claims] 1. A method of connecting parts of an apparatus composed of a plurality of parts, wherein each of the plurality of parts is connected using a shape memory alloy, and the shape memory alloy is heated at the time of heating. It is characterized in that a shape for disconnecting each connection between a plurality of parts is stored in advance, and when it becomes necessary to disassemble the device, the device is disassembled by heating the entire device. Parts connection method.