JPH10321082A - Switch structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance operability and form a switch top, without increasing production cost of a molding mold by stacking a block type auxiliary switch on the switch top which is integrally formed in an insulating sheet and switches a contact by responding by elastic deformation to pressure. SOLUTION: A switch top 10 is trapezoidally formed projectingly in an insulating sheet 8, a flat stacking surface 10a for stacking an auxiliary switch top 13 is formed on the top surface, and a flat fixing surface 10b for fixing a contact 4 is formed on the bottom surface. Since the auxiliary switch top 13 is stacked on the switch top 10, the projecting amount of the switch top 10 is increased to make operability satisfactory. Since the auxiliary switch top 13 is stacked on the switch top 10 by adhesion, complexity of a molding mold is avoided to prevent increase in production cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a switch structure having a switch top for opening and closing a contact in response to pressure by elastic deformation.

[0002]

2. Description of the Related Art Conventionally, as a switch structure, for example,
5 and 6 are known.

In the conventional switch structure shown in FIG. 5, two switch sheets 2 and 3 laminated via a spacer sheet 1 are provided with contacts 4 and 5 made of an aluminum-carbon layer or the like by etching or the like. . Both contacts 4 and 5 are
They face each other with a switch clearance 6 cut out from the spacer sheet 1. The lower side of the spacer sheet 1, the switch sheets 2, 3, the contacts 4, and 5 are supported by being laminated by a hard substrate 7, and the upper side is laminated and covered by an insulating sheet 8. The insulating sheet 8 is made of silicon rubber or the like.
At a position corresponding to the switch clearance 6, a trapezoidal elastic portion 9 and a columnar switch top 10 which are integrally formed in a shape protruding upward are provided. The upper part of the insulating sheet 1 is covered with a hard protector cover 11. Further, the switch top 10 protrudes upward from a window 12 provided in the protector cover 11.

In the conventional switch structure shown in FIG.
The contact 4 (movable contact) is pushed on the bottom surface of the switch top 10 and comes into contact with the contact 5 (fixed contact) due to the elastic deformation of the elastic portion 9 due to the pressing of the switch top 10.

The conventional switch structure shown in FIG.
And the switch top 10 are provided with contacts 4 and 5. On the substrate 7, the contact 5 made of a copper layer or the like is provided by a printing technique. In the switch top 10, a contact 4 made of a carbon layer or the like is provided on the inner wall surface of the switch top 10 formed in a hemispherical shape on the insulating sheet 8 by carbon printing (for details, see Japanese Utility Model Application Laid-Open No. 63-1845).
No. 25). An insulating sheet is laminated on the substrate 7 provided with the contacts 4 via the spacer sheet 1. Therefore, both contacts 4 and 5 are connected to the spacer sheet 1
Of the switch top 6 and the projecting space of the switch top 10. Note that the protector cover 11 is not provided.

In the conventional switch structure shown in FIG.
Due to the elastic deformation of the switch top 10 itself due to the pressing of the switch top 10, the contact 4 (movable contact) descends and comes into contact with the contact 5 (fixed contact).

[0007]

In the conventional switch structure shown in FIG. 5, the elastic sheet 9 and the switch top 10 each having a complicated uneven structure with a height difference must be integrally formed on the insulating sheet 8. Therefore, there is a problem that the manufacturing cost of the mold for forming the insulating sheet 8, the elastic portion 9, and the switch top 10 increases.

In the conventional switch structure shown in FIG. 6, the amount of protrusion S of the switch top 10 from the insulating sheet 8 is shown.
Therefore, there is a problem that an erroneous operation is easily performed between adjacent switch structures and the like, resulting in poor operability.

The present invention has been made in consideration of the above problems, and has as its object to provide a switch structure in which a switch top having good operability is formed without increasing the production cost of a molding die. And

[0010]

In order to solve the above-mentioned problems, the switch structure according to the present invention employs the following means.

According to the first aspect of the present invention, in a switch structure in which a switch top that opens and closes a contact in response to pressure by elastic deformation is formed integrally with an insulating sheet, a block-type auxiliary switch top is used as the switch top. It is characterized by being laminated and bonded.

In this means, since the auxiliary switch top is laminated on the switch top, the amount of projection of the switch top is increased, and the operability is improved. In addition, since the separately formed auxiliary switch top is laminated on the switch top by bonding, the complexity of the molding die is avoided and the production cost is not increased.

According to a second aspect of the present invention, in the switch structure of the first aspect, the auxiliary switch top is formed of a light transmissive material, and the switch top and the auxiliary switch top are bonded with an optical adhesive which is solidified by light irradiation. It is characterized by the following.

According to this means, by selecting the optical adhesive, the switch top and the auxiliary switch top are firmly adhered and integrated in a short time, thereby providing a high degree of durability.

According to a third aspect of the present invention, in the switch structure of the second aspect, the optical adhesive is contained in an ultraviolet curable ink and is applied by printing to one or both of the switch top and the auxiliary switch top. I do.

In this means, the switch top and the auxiliary switch top are bonded using a printing technique.

According to a fourth aspect of the present invention, in the switch structure of the third aspect, the display content is printed with an ultraviolet curable ink, and the auxiliary switch top is formed of a material that allows the display content to be seen. .

In this means, information related to switch control and the like are visually recognized as display contents.

According to a fifth aspect of the present invention, in the switch structure of the first aspect, the switch top and the auxiliary switch top are bonded by ultrasonic welding.

According to this method, the switch top and the auxiliary switch top are bonded by diffusion welding without being melted by ultrasonic welding.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a switch structure according to the present invention will be described below with reference to FIGS.

FIGS. 1 to 3 show an embodiment (1) of a switch structure according to the present invention.

In this embodiment, an example is shown in which a part of the conventional example shown in FIG. 6 is used.

As a material of the insulating sheet 8 of this embodiment, thermoplastic polyester (PET), polycarbonate (PC), or the like is used. Therefore, as for the switch top 10, the insulating sheet 8 which has been softened by heating can be manufactured by press working with a simple molding die composed of a die and a punch.

The switch top 10 of this embodiment is
A flat mounting surface 1a is formed on the insulating sheet 8 so as to protrude in a trapezoidal shape.
0b is formed.

The auxiliary switch top 13 is formed in a block shape having a laminated surface corresponding to the laminated surface 10a of the switch top 10. The material of the auxiliary switch top 13 is a transparent light-transmitting ABS resin (AB
S), acrylic resin (PMMA) is employed. Therefore, the auxiliary switch top 13 can be manufactured by injection molding using an injection mold having a simple structure.

The switch top 10 and the auxiliary switch top 13 are adhered by an ultraviolet curable ink 14 containing a photo-adhesive, which is a photopolymerizable photosensitive material that is solidified by light irradiation. That is, as shown in FIG. 2, after the ultraviolet curable ink 14 is printed on the lamination surface 10a of the switch top 10, the auxiliary switch top 13 is laminated on the ultraviolet curable ink 14 as shown in FIG. Light (ultraviolet light) is emitted from the auxiliary switch top 13. The ultraviolet-curable ink 14 irradiated with light cures in a short time, and the optical adhesive exhibits adhesiveness. Since this optical adhesive has high adhesiveness and excellent durability, the switch top 10 and the auxiliary switch top 13 are firmly integrated for a long period of time.

If the display contents 15 such as information related to switch control are printed before printing the ultraviolet curable ink 14, the display contents 15 can be seen through the auxiliary switch top 13.

According to this embodiment, since the auxiliary switch top 13 is laminated on the lamination surface 10a of the switch top 10, the protrusion amount S of the switch top 10 including the auxiliary switch top 13 is increased. Therefore,
Erroneous operation between adjacent switch structures etc. is eliminated,
Operability is improved.

Further, since the separately formed auxiliary switch top 13 is laminated on the lamination surface 10a of the switch top 10 by bonding, the molding of the auxiliary switch top 13 and the switch top 10 can be prevented from becoming complicated. Therefore, the production cost of the molding die does not increase.

FIG. 4 shows an embodiment (2) of a switch structure according to the present invention.

In this embodiment, the switch top 1
0, the auxiliary switch top 13 is bonded by ultrasonic welding.

According to this embodiment, since the bonded portions of the switch top 10 and the auxiliary switch top 13 are bonded without diffusion and are bonded like diffusion bonding, the bonding can be performed without breaking the insulating property of the insulating sheet 8. it can.

The bonding by ultrasonic welding does not deteriorate the bonding strength and durability as compared with the optical adhesive of the above-mentioned embodiment (1).

As described above, in addition to the illustrated embodiment, the conventional switch top 10 shown in FIG. 5 can be configured.

[0036]

In the above embodiment (1), the spacer sheet 1 was made of LIN85 TL85 (0.125 m).
m), HK31 PET (about 0.125 mm) manufactured by Higashiyama Co., and UV curable ink 14
It is preferable to employ UVTAC2800 manufactured by Teikoku Ink Co., Ltd.

[0037]

As described above, in the switch structure according to the present invention, since the amount of protrusion of the switch top is increased by laminating the auxiliary switch tops, there is no erroneous operation between adjacent switch structures and the like. This has the effect of improving the properties.

Furthermore, since the switch top and the auxiliary switch top are separately molded and laminated and bonded, the complexity of the molding die is avoided, and the production cost of the molding die does not increase.

[Brief description of the drawings]

FIG. 1 shows an embodiment (1) of a switch structure according to the present invention.
FIG.

FIG. 2 is a perspective view illustrating a manufacturing example of FIG.

FIG. 3 is a view showing a completed state of the manufacturing process of FIG. 2;

FIG. 4 is an embodiment (2) of a switch structure according to the present invention.
FIG.

FIG. 5 is a sectional view showing a conventional example.

FIG. 6 is a sectional view showing another conventional example.

[Explanation of symbols]

 4, 5 contacts 8 Insulation sheet 10 Switch top 13 Auxiliary switch top 14 UV curable ink 15 Display contents

Claims (5)

[Claims] In a switch structure in which a switch top for opening and closing a contact in response to elastic deformation to pressure is formed integrally with an insulating sheet, a block-type auxiliary switch top is laminated and bonded to the switch top. Characterized switch structure. 2. The switch structure according to claim 1, wherein one or both of the switch top and the auxiliary switch top are formed of a light transmissive material, and the switch top and the auxiliary switch top are made of an optical adhesive that solidifies by light irradiation. A switch structure characterized by being bonded. 3. The switch structure according to claim 2, wherein the optical adhesive is contained in an ultraviolet-curable ink, and the switch top,
A switch structure characterized in that one or both of the auxiliary switch tops is applied by printing. 4. The switch structure according to claim 3, wherein the display contents are printed with an ultraviolet curable ink, and the auxiliary switch top is formed of a material through which the display contents can be seen. 5. The switch structure according to claim 1, wherein the switch top and the auxiliary switch top are bonded by ultrasonic welding.