JP2001101949A - Operation panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide highly waterproof operation panel that can prevent a panel sheet from falling off. SOLUTION: A circuit board 2 comprises a panel sheet 1 that includes a operation part 11, a supporting body 3 that includes an operation hole 31 positioned on the back of the panel sheet 1 and responding to operation part 11 and includes a vent hole 32 installed on the different site from the operation hole 31, an elastic member 4 that fills up operation hole from behind, and a switch 22 that is installed on the site responding to this elastic member 4, wherein the vent course 33 connects the operation hole 31 with the vent hole 32 on the surface of the supporting body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation panel which is used for controlling and setting various devices such as a marine machine, a construction machine, and a remote controller, and particularly has an operation switch which requires waterproofing.

[0002]

2. Description of the Related Art For example, many electronic devices used in construction machines have a highly airtight structure so that water and dust do not enter a circuit board or the like.

[0003] In particular, an operation switch generally has a circuit board inside the operation section. In the case of a control switch used in an environment such as rain, rainwater or the like intrudes from the switch operation section. It is necessary to provide a switch operation unit in consideration of airtightness in order to prevent the airtightness.
Therefore, there is one in which the operation unit is formed of a single elastic thin plate sheet to improve airtightness to a circuit board (for example, Japanese Patent Application Laid-Open No. H8-7162).

[0004] However, even with such a structure using a panel sheet, there is a possibility that scratches and cracks may occur in the thin panel sheet, and water and dust enter the circuit board from the scratches and cracks. There is a risk that the circuit board may be damaged, the machine may stop, or malfunction. Therefore, as shown in FIG. 4, the operation hole B penetrating the support body A is closed with an elastic member C from the rear side, and water or the like is prevented from entering the circuit board E having the switch D from the operation section side, One that has a double waterproof structure together with the panel F is known.

[0005]

However, in this structure, a space closed by the panel sheet, the elastic member and the support is formed, and the air existing in the space expands and contracts due to a change in the temperature of the outside air. May be
Due to the contracted air, the operation part of the panel sheet may be depressed or the elastic member may be pushed up,
At the time of the pressing operation, not only the operation feeling transmitted to the fingertip is different from the normal operation, but also a problem such as peeling of the panel sheet from the support due to the pressure of the expanded air may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an operation panel which has high waterproofness against water or the like penetrating into the circuit board from the operation section side and can prevent the panel sheet from peeling off.

[0007]

According to the present invention, there is provided a panel sheet having an operation portion which can be elastically deformed by a pressing operation, an operation hole located on the back side of the panel sheet and opened corresponding to the operation portion. A support having a ventilation hole formed therethrough at a position different from the operation hole, a circuit board having a switch at a position corresponding to the operation portion, and operating the switch in response to a pressing operation of the operation portion An operation panel, comprising: an elastic member that closes the operation hole from the back side of the support; and a ventilation path that connects the operation hole and the ventilation hole on the front side of the support. It is.

[0008] Further, there is provided an operation panel, wherein a porous membrane that does not allow water to pass therethrough is provided in the vent hole.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A waterproof operation panel according to the present invention is
A panel sheet 1 having an operation portion 11 that can be elastically deformed by a pressing operation, and an operation hole 31 located on the back side of the panel sheet 1 and opened corresponding to the operation portion 11, and formed through a different position from the operation hole 31. The support body 3 having the ventilation hole 32, the circuit board 2 having the switch 22 at a position corresponding to the operation unit 11, the switch 22 is operated according to the pressing operation of the operation unit 11, and the operation hole 31 is supported. Body 3
And a ventilation path 33 connecting the operation hole 31 and the ventilation hole 32 to the front side of the support 3. Therefore, the panel sheet is highly waterproof with respect to water or the like entering the circuit board 2 from the operation unit 11 side, and by providing the ventilation path 33 and the ventilation hole 32, the expanded air can escape and the panel sheet can be peeled. Can be prevented.

Further, by providing the porous membrane 6 that does not allow water to pass through the air through the vent hole 31, it is possible to improve the waterproofness while ensuring the airtightness.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An operation panel for controlling and operating a construction machine will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a main part of an operation panel according to a first embodiment of the present invention. The operation panel includes a panel sheet 1, a circuit board 2, a support 3, and an elastic member 4. The support 3 includes an upper case 3a and a lower case 3b, and a panel sheet 1 is provided on a front surface of the upper case 3a, and a circuit board 2 is provided in a space formed by the upper case 3a and the lower case 3b. FIG. 2 is a perspective view of the panel sheet 1 and the support 3.

The panel sheet 1 is made of PET having flexibility.
It is made of a film, and has four raised operating portions 11 which can be pressed by an operator by embossing in advance. On the front side of the panel sheet 1, a display unit 12 made up of symbols, characters, and the like indicating a control function is provided.
1, an adhesive sealing material is applied to a surface portion other than the operation unit 11 on the rear surface side of the panel sheet 1 and is attached to a front surface of a support 3 described later.

The circuit board 2 controls the construction machine electrically. The circuit board 2 has printed wiring and electronic components 21 and switches 22 are provided at locations corresponding to the operation section 11 of the panel sheet 1. . In this embodiment, a switch 22 composed of a tact switch is provided. The circuit board 2 promotes a corresponding mechanical control according to an electrical change due to opening and closing of the switch 22.

The support 3 is made of a synthetic resin material such as polycarbonate, and has an operation hole 31, a ventilation hole 32, and a ventilation path 33 formed on the front side of the support 3. The operation hole 31 is
The support body 3 is opened so as to penetrate from the front side to the back side, and four are formed so as to face the operation unit 11. The ventilation holes 32 are opposed to one portion of the sheet panel other than the operation unit 11. The ventilation path 33 is formed so as to penetrate from the front side to the back side, and the ventilation path 33 connects between the ventilation hole 32 and the operation hole 31 to allow ventilation between the operation holes 31. It is also formed in a groove shape so as to be connected to the ventilation hole 32.

Further, the partition wall 3 is provided on the support 3 so that water or the like entering through the vent hole 32 does not adhere to the circuit board 2.
4 are formed, and outside air holes 35 are formed on the back side of the support 3 so as to allow the outside air to pass therethrough.

A support member 5 made of a synthetic resin material and having an open portion facing the operation hole 31 of the support 3 is housed inside the support 3 together with the circuit board 2. The base 2 is fixed by screws B so as to be in close contact with the upper case 3a. The holding member 5 can be fixedly held on the upper case 3a by a method such as engagement with a hook (not shown), heat welding, ultrasonic welding, or the like.

The elastic member 4 is made of an elastic and waterproof material such as silicon rubber, and forms a shaft portion 41 and a fixed leg portion 42. To the switch 22, and is provided so as to be located in the operation hole 31 of the support body 3 facing the operation unit 11. The fixed leg portion 42 fixes the elastic member 4 at a predetermined position. The fixed leg portion 42 is sandwiched between the support body 3 and the pressing member 5, so that the rear side of the operation hole 31 is closed by the elastic member 4 without any gap and hermetically sealed. Is done. Also, the shaft portion 41
The portion connecting the and the fixed leg portion 42 is formed to be thin so that the shaft portion 41 is easily bent up and down.

As described above, by covering the surface side of the support 3 with the panel sheet 1, it is possible to obtain an operation panel having a highly airtight operation section 11 with no gap for water or dust to enter from the surface side. At the same time, even when the panel sheet 1 is broken or broken, the operation holes 31 are closed without gaps by the elastic members 4, so that water or the like hardly penetrates into the circuit board 2 from the operation section 11 side and has waterproof property. An excellent structure can be taken.

Air that expands or contracts in a space formed between the operation hole 31 and the panel sheet 1 can flow through the air passages 33 and the air holes 32, and generates a pressure difference from outside air. Therefore, a stable operation feeling by pressing the switch 22 can be given to the operator. Further, it is possible to prevent the panel sheet 1 from peeling off from the support 3 due to expansion and contraction of air.

FIG. 3 shows a cross section of an operation panel according to a second embodiment of the present invention.
It is composed of a support 3, an elastic member 4, and a porous membrane 6. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The support 3 is made of a synthetic resin material such as polycarbonate, and has an operation hole 31, a ventilation hole 32, and a ventilation path 33 formed on the front side of the support 3, and the outside air and the air flow behind the support 3. Possible external pores 35 are formed.

The elastic member 4 is made of an elastic and waterproof material such as silicon rubber, and is formed integrally with a plurality of shaft portions 41 and fixed leg portions 42. By sandwiching the fixed leg portion 42 between them, the rear side of the operation hole 31 is closed and sealed by the elastic member 4 without any gap.

The porous membrane 6 has a filter function of allowing air but not water to pass therethrough, and is fixed to the vents 32 of the support 3 so as to be sandwiched between the support 3 and the holding member 5.

As described above, by blocking the 32 air holes with the porous film 6, it is possible to prevent water or the like from entering the support 3 from the front surface while allowing air to flow into the support body 3, thereby ensuring air permeability. The waterproofing of the circuit board 2 housed in the support 3 is achieved.

In the above-described embodiment, the elastic member 4 and the porous membrane 6 are fixed and held so as to be sandwiched between the support member 3 and the holding member 5, but the elastic member 4 and the support member 3 are bonded by an adhesive (not shown). It can also be fixed by bonding.

In the case of an operation panel in which water or the like may enter from behind the support 3, the operation panel having a higher waterproofing effect can be obtained by providing a porous film in the outside pores 35.

[0027]

According to the present invention, there is provided a panel sheet having an operation portion capable of being elastically deformed by a pressing operation, an operation hole located on the back side of the panel sheet and opening corresponding to the operation portion, and an operation hole. A support having ventilation holes penetratingly formed at different positions, a circuit board having a switch at a location corresponding to the operation unit, and operating the switch in accordance with a pressing operation of the operation unit and operating the operation hole An elastic member closing the support from the back side, and a ventilation path connecting the operation hole and the ventilation hole to the front side of the support,
By providing the control panel, it is possible to provide an operation panel which has high waterproofness and can prevent peeling of the panel sheet.

[Brief description of the drawings]

FIG. 1 is a sectional view of an operation panel according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a panel sheet and a support of an operation panel according to the embodiment of the present invention.

FIG. 3 is a sectional view of an operation panel according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of an operation panel using a conventional panel sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel sheet 11 Operation part 2 Circuit board 22 Switch 3 Support body 31 Operation hole 32 Vent hole 33 Vent path 4 Elastic member 6 Porous membrane

Claims (2)

[Claims] 1. A panel sheet having an operation portion that can be elastically deformed by a pressing operation, an operation hole located on the back side of the panel sheet and opened corresponding to the operation portion, and penetrated to a position different from the operation hole. A support having a ventilation hole formed therein, a circuit board having a switch at a position corresponding to the operation unit, and operating the switch in response to a pressing operation of the operation unit and connecting the operation hole to the support An operation panel, comprising: an elastic member that closes from the back side of the support member; and a ventilation path that connects the operation hole and the ventilation hole to the front side of the support. 2. The operation panel according to claim 1, wherein a porous film that does not allow water to pass therethrough is provided in the vent hole.