JPH08162780A - Operation panel of electronic device - Google Patents

Abstract

PURPOSE: To provide an operation panel of an electronic device excellent in operability at the time of assembly and disassembly. CONSTITUTION: In an operation panel C of an electronic device where a button housing part 18 housing buttons 5, 4 on the rear of a case 1 and a rubber contact part 6 and a printed wiring board are mounted on the back side of this button housing part 18 and this printed wiring board is mounted on the case 1, screw bosses 15 are formed on the button housing part 18 and engaging nails 14 are formed around the button housing part 18 respectively and screws 16 are spirally fixed to screw holes 24 and screw bosses 15 formed on the printed wiring board. Together therewith the periphery of the printed wiring board is made to engage with the engaging nails 14 end the printed wiring board is attached to the case 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation panel for electronic equipment.

[0002]

2. Description of the Related Art As a general electronic component, there is an electronic component as shown in FIG. 5. In FIG. 5, an electronic device A has a mechanical part (not shown) inside a casing B having an opening on one side. )
The operation panel C is attached to the front surface of the housing B.

Conventionally, in the operation panel C of this kind of electronic equipment, the liquid crystal display 5 is attached to the back surface of the case 1 with screws 16 as shown in FIGS. 6 and 7, and the back surface of the case 1 is attached. Each has ribs 12 and 13 that are partitioned, and dial buttons 3 are formed on these ribs 12 and 13.
The function button 4 is slidably housed in the front and back directions of the case. Further, a rubber contact 6 and a printed wiring board 7 are sequentially mounted on the back sides of the ribs 12 and 13, and the printed wiring board 7 is attached to the case 1 with screws 16.
The rubber contact 6 is provided with ribs 1 and 2 by the printed wiring board 7.
It is held in pressure contact with the back surface of No. 3.

The rubber contact 6 has a contact portion 6 at a position where it abuts on the back side of the dial button 3 and the function button 4.
a is formed. The contact portion 6a is projected to the case 1 side, and the conductive contact 6b provided at the center portion on the back side of the contact portion 6a is normally located with a slight gap between the contact portion 6a and the printed wiring board 7, and the dial button 3 and When the function button 4 is pushed toward the back surface of the case 1, the printed wiring board 7 is brought into contact with a circuit (not shown) formed on the printed wiring board 7 to be electrically connected.

Therefore, in the operation panel C, the conductive contact 6b
In order to bring the printed wiring board 7 into good contact with the printed wiring board 7, it is important to eliminate the bending and distortion of the printed wiring board 7 and evenly press the entire printed wiring board 7 into contact with the rubber contact 6 to fix it. In the example, the screws 16 are fixed to the case 1 around the printed wiring board 7 and at a plurality of locations in the center.

[0006]

However, in the operation panel C having the above structure, the printed wiring board 7 is attached to the plurality of screws 1.
6 and the liquid crystal display 5 is also attached by the screws 16, the number of the screws 16 used for attachment is large, and there is a problem that workability of assembling and disassembling is poor.

An object of the present invention was made in view of the above problems, and it is an object of the present invention to provide an operation panel of an electronic device which is excellent in workability during assembly and disassembly.

[0008]

In order to achieve the above object, the present invention forms a button accommodating portion for accommodating a button on the back surface of a case, and mounts a rubber contact and a printed wiring board on the back side of the button accommodating portion. In an operation panel of an electronic device in which the printed wiring board is attached to the case, a screw boss is formed in the button housing portion and a locking claw is formed around the button housing portion, and a screw formed in the printed wiring board is formed. A screw is screwed into the hole and the screw boss, and the periphery of the printed wiring board is locked by the locking claws to attach the printed wiring board to the case.

Further, according to the present invention, a liquid crystal display accommodating portion having an opening window portion formed on the back surface of the case is provided, and in the operation panel of an electronic device in which the liquid crystal display accommodating portion is mounted, the periphery of the liquid crystal display is provided. A mounting projection is provided on the liquid crystal display, and a rib for fitting and holding the mounting projection and a locking projection for locking the back surface of the liquid crystal display are formed in the liquid crystal display accommodating portion.

Preferably, the printed wiring board may be formed in a size that covers at least a part of the button accommodating portion and the liquid crystal display accommodating portion, and the back surface of the liquid crystal display may be pressed and held.

[0011]

With this structure, since the periphery of the printed wiring board is locked by the locking claws in the present invention, the screw holes are mounted on the printed wiring board and the screw boss is mounted. Limited to, the number of screws can be reduced.

Further, in the present invention, the mounting projection is fitted to the rib to prevent the liquid crystal display from being displaced, and the locking projection allows the back surface of the liquid crystal display to be locked. Since the ribs are pressed against the rib side, the liquid crystal display can be attached to the case without using screws.

Further, according to the present invention, since the back surface of the liquid crystal display is held in pressure contact with the printed wiring board, the liquid crystal display can be mounted more reliably.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an operation panel of an electronic device according to the present invention will be described below with reference to FIGS. 1 to 4, and the same components as those in the conventional art are designated by the same reference numerals. 1 is a perspective view of an operation panel of an electronic apparatus according to the present invention, FIG. 2 is an exploded perspective view of the operation panel, and FIG. 3 is a rear view of the operation panel. The panel C includes a case 1, a panel 2, a dial button 3 and a function button 4 (button), a liquid crystal display 5, a rubber contact 6, and a printed wiring board 7.

The case 1 is made of resin, and the panel 2 is attached to the surface thereof.

As shown in FIG. 2, the back surface of the case 1 is divided into a liquid crystal display accommodating portion 8 and a button accommodating portion 18, of which the button accommodating portion 18 has ribs 12 that are open in the front and back directions of the case 1. 13 are formed, and these ribs 12,
A stopper 19 is formed on the inner surface of 13.

The dial 12 is attached to the rib 12 and the rib 1 is attached to the rib 12.
A function button 4 is slidably housed in the front and back sides of the dial 3, and locking protrusions 20 are provided on the dial button 3 and the function button 4, respectively. It is designed to be locked by the stopper 19. Further, a rubber contact 6 and a pin 21 are provided on the back side of the ribs 12 and 13 in order to prevent displacement of the printed wiring board 7 when the printed wiring board 7 is attached.

A plurality of screw bosses 15 are formed in the center of the case 1, and locking claws 14 for engagingly holding the printed wiring board 7 are formed around the button accommodating portion 18.

A pin hole 22 corresponding to the pin 21 is formed in the rubber contact 6, and the rubber contact 6 has ribs 12 and 1 formed by penetrating the pin 21 into the pin hole 22.
It is mounted on the back side of 3. Further, the rubber contact 6 is formed with a contact portion 6 a at a position located on the back side of the dial button 3 and the function button 4. This contact part 6a
Has a conductive contact 6b at the center of the back side, and the conductive contact 6b is formed slightly above the back surface of the rubber contact 6 on the front side. That is, when the printed wiring board 7 is mounted on the back surface of the rubber contact 6, a gap is formed between the printed wiring board 7 and the conduction contact 6b, and the dial button 3 and the function button are provided from the front side of the case 1. 4 is pressed to bring the conductive contact 6b into pressure contact with the printed wiring board 7.

The printed wiring board 7 is sized to cover the entire button housing 18 and a part of the liquid crystal display housing 8, and pin holes 23 are formed at positions corresponding to the pins 21 and the screw bosses 15, respectively. , Screw holes 24 are formed. A circuit (not shown) is formed on the front surface of the printed wiring board 7, and a connector 25 connected to this circuit is provided on the back surface.

On the other hand, in the liquid crystal display accommodating portion 8 of the case,
A rectangular opening 9 is formed, and a rib 10 serving as a guide for assembling the liquid crystal display 5 is formed around the opening 9, and a step having a square shape and lowering the opening 9 side is formed on the upper surface. The ribs 11 and the locking projections 27 that support the liquid crystal display 5 from the rear surface side are projected.

The liquid crystal display 5 integrally houses a liquid crystal plate (not shown), and the corners of the liquid crystal display 5 are attached to the mounting portion 5a.
The mounting protrusion 5b is formed so as to project from the mounting portion 5a. A flat cable 26, one end of which is connected to a liquid crystal plate, extends on the back surface of the liquid crystal display 5, and the other end of the flat cable 26 is connected to a connector 25 on the back side of the printed wiring board 7 and printed with the liquid crystal plate. The wiring board 7 is short-circuited.

Next, a process of assembling the operation panel of the electronic device having the above structure will be described.

In the operation panel C, the liquid crystal display 5 is attached to the case 1 on the liquid crystal display housing 8 side, and the dial buttons 3 and function buttons 4 are housed inside the ribs 12 and 13 on the button housing 18 side. After placing the rubber contact 6 on the back side of the ribs 12 and 13, the printed wiring board 7 is attached.

The liquid crystal display 5 is mounted by pressing the liquid crystal display 5 toward the case 1 so that the mounting projection 5b is placed on the rib 11 of the case 1. In the liquid crystal display 5, the locking projection 27 is deformed to the outside, and when the liquid crystal display 5 is further pressed, one mounting portion 5a is locked by the locking projection 27. At this time, as shown in FIG. Since the dimension from the support surface 11a to the support surface 27a of the locking protrusion 27 is formed smaller than the thickness of the mounting portion 5a of the liquid crystal display 5, the locking portion 27a of the locking protrusion 27 is bent. , This locking part 2
The liquid crystal display 5a is brought into pressure contact with the reaction force of 7a.

The height of the screw boss 15 is such that, when the printed wiring board 7 is mounted, the dimension from the printed wiring board 7 to the supporting surface 11a of the rib 11 is equal to the thickness of the mounting portion 5a of the liquid crystal display. Printed wiring board 7 and liquid crystal display mounting portion 5a, and liquid crystal display mounting portion 5a and rib 11 supporting surface 11a
The printed wiring board 7 is pressed and held without a gap therebetween. Therefore, the liquid crystal display 5 can be securely fixed to the back surface of the case 1 without using screws.

To mount the printed wiring board 7, the pins 21 are passed through the pin holes, and the periphery of the printed wiring board 7 is locked by the locking claws 14, and three screw holes at the center of the printed wiring board 7 are mounted. Then, the screw 16 is screwed onto the screw boss of the case 1. The printed wiring board 7 is securely fixed to the case 1 by the locking claws 14 and the screws 16.

As described above, in the operation panel C of the electronic apparatus of the above-described embodiment, the engaging claw 14 engages and holds the periphery of the printed wiring board 7, so that only the central portion of the printed wiring board 7 is screwed.
6 need only be fixed, and since the engagement projection 27 and the printed wiring board 7 hold the liquid crystal display 5 in pressure contact with the case 1 side, the screws 16 are not required, and the total number of screws 16 is greatly increased. Can be reduced to

[0029]

As described above, according to the first aspect of the invention, since the periphery of the printed wiring board is locked by the locking claws, the mounting by screws is formed on the printed wiring board. The number of screws can be reduced by limiting the attachment of the screw hole and the screw boss, and the workability of assembling and disassembling can be improved. The workability of assembling and disassembling can be improved.

In the invention according to claim 2, the mounting projection is fitted to the rib to prevent the liquid crystal display from being displaced, and the locking projection locks the rear surface of the liquid crystal display. Since the mounting projection is pressed against the rib side, the liquid crystal display can be mounted on the case without using screws, and the workability of assembling and disassembling the operation panel is improved as in the invention according to claim 1. Can be made.

Further, in the invention according to claim 3,
Since the back surface of the liquid crystal display is pressed and held by the printed wiring board, the liquid crystal display can be attached more reliably.

[Brief description of drawings]

FIG. 1 is a perspective view of an operation panel of an electronic device according to the present invention.

FIG. 2 is an exploded perspective view of the operation panel.

FIG. 3 is a rear view of the operation panel.

FIG. 4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view of a general electronic device.

FIG. 6 is an exploded perspective view of an operation panel of a conventional electronic device.

FIG. 7 is a rear view of an operation panel of a conventional electronic device.

[Explanation of symbols]

 1 Case 3 Dial Button (Button) 4 Various Function Buttons (Button) 6 Rubber Contact 7 Printed Wiring Board 14 Locking Claw 15 Screw Boss 18 Button Housing 24 Screw Hole C Operation Panel

Claims (3)

[Claims] 1. A button accommodating portion for accommodating a button is formed on a back surface of a case, a rubber contact and a printed wiring board are mounted on a back side of the button accommodating portion, and an electronic device having the printed wiring board attached to the case is provided. In the operation panel, a screw boss is formed in the button housing portion, and locking claws are formed around the button housing portion, and screws are screwed into the screw hole and the screw boss formed in the printed wiring board. An operation panel for an electronic device, wherein the printed wiring board is attached to the case by locking the periphery of the printed wiring board with the locking claws. 2. An operation panel of an electronic device, comprising a liquid crystal display accommodating portion having an opening window portion formed on a back surface of a case, wherein the liquid crystal display accommodating portion is mounted around the liquid crystal display. An operation panel of an electronic device, wherein a protrusion is provided, and a rib for fitting and holding the mounting protrusion and a locking protrusion for locking the back surface of the liquid crystal display are formed in the liquid crystal display housing. 3. The printed wiring board is formed in a size that covers at least a part of the button housing portion and the liquid crystal display housing portion, and the back surface of the liquid crystal display is held in pressure contact. Item 2. An operation panel for an electronic device according to item 2.