US20020018340A1

US20020018340A1 - Operating component placement system for electronic equipment

Info

Publication number: US20020018340A1
Application number: US09/817,923
Authority: US
Inventors: Hiroshi Okamoto
Original assignee: Westwood Co Ltd
Current assignee: Westwood Co Ltd
Priority date: 2000-03-27
Filing date: 2001-03-26
Publication date: 2002-02-14
Anticipated expiration: 2021-03-26
Also published as: US6445595B2; US20020176242A1; US6504731B2; JP2001274561A; JP3534675B2

Abstract

In an operating component placement system for electronic equipment, assembly units (5) having cables (8) whereby operating components (6 a to 6e) are connected to connectors (7 a to 7 e) are used to mount the operating components (6 a to 6 e) to a front panel (4), with connectors (7 a to 7 e) connected to connectors (3 a to 3 e) on a panel board (3) for signal input for various functions, and the cable lengths for operating component groups (6 a to 6 c) and (6 d and 6 e) having the same form established so as to be longer than the maximum distance between the connectors (3 a to 3 c) and (3 d and 3 e) to which each operating component group is to be connected on the panel board 3 and hole groups (4 a to 4 c) and (4 d and 4 e) for mounting each of the operating component groups to the front panel. Operating components having the same form can be selectively laid out by changing the cable positioning.

Description

BACKGROUND OF INVENTION

1. Field of the Invention

The present invention relates to an operating component placement system for electronic equipment, and more specifically to a system which enables the selective placement of operating components for various functions on the front panel of electronic equipment such as radio equipment, in accordance with the needs of the operator or the installation location and the like.

2. Related Art

Electronic equipment such as radio equipment has many operating components located on a front panel, the placement of which thereon is done with consideration given to the ease of operation when performing control of the associated functions. For example, the scheme followed in the case of radio equipment is that operating components for changing the frequency, which are often operated (such as rotary encoders) are placed on the right side, operating components for audio volume adjustment (such as potentiometers) are placed on the left side, and switches used to change the mode or select a frequency band (such as pushbutton switches) and squelch level adjusting components (such as potentiometers) are located in the center.

There are a variety of methods of mounting operating components to a front panel, the general method employed being that of pre-assembling operating components to a panel board, and then mounting the panel board to the rear surface of the front panel, so that operating parts of the operating components protrude through or are exposed via holes formed in the front panel, with knobs mounted to protruding shafts that form the operating parts of operating components.

The configuration shown in FIG. 5 and FIG. 6 of the accompanying drawings is that of an example applied to a radio receiver, these drawings being an outer perspective view and an exploded view of the various constituent elements thereof.

In these drawings, the

reference numeral

101 denotes a die-cast chassis, 102 is a PCB (printed circuit board), onto which is packaged an electronic circuit, 103 is a top cover, 104 is a bottom cover, 105 are operating components such as potentiometers, rotary encoders, and switches, 106 is a liquid-crystal display panel, 107 is a panel board, 108 is a front panel, 109 are knobs, and 110 is a transparent acrylic sheet, the radio receiver 100 being assembled by the following procedure.

First, the PCB 102 is mounted to the die-cast chassis 101 after the connector 102 a is mounted to the PCB 102.

The

panel board

107 also is formed by a PCB, the various operating components 105 being soldered or brazed into place with the operating parts thereof passing through the holes pre-formed in the panel board 107, the terminals of each being connected by soldering to the conductive pattern parts of the panel board 107, and the LCD panel being mounted to a window formed in the panel board 107.

A connector-terminated

cable

107 a is also connected to the panel board 107, thereby completing the overall panel board assembly 107 b.

Next, holes and windows are formed also in the

front panel

108 at positions corresponding to the holes and windows in the panel board 107, the panel board assembly 107 b, to which are mounted the

various parts

105, 106, and 107 a, being mounted to the rear surface of the front panel 108, and the transparent acrylic sheet 110 being mounted to the window part formed at the front surface of the front panel 108.

Then, the

entire front panel

108, to which is mounted the panel board assembly 107 b, is mounted to the front surface of the die-cast chassis 101, after which the connector-terminated cable 107 a of the panel board assembly 107 b is connected to a connector 102 a on the PCB 102, and if there are connectors on the rear surface of the die-cast chassis 101, these are also connected to the PCB 102.

After the above is done, the

top cover

103 and the bottom cover 104 are mounted to the die-cast chassis 101, and finally knobs 109 are pressed from the front side onto shafts of operating parts of the operating components 105 passing through holds in the front panel 108, thereby completing the assembly of the product (the radio receiver 100).

Recently, to simplify the assembly process, a bracket or the like, to which individual components are mounted, is fixed to the

PCB

102, with the parts 105 and 106 being directly mounted to the PCB 102, along with the electronic circuit, so as to achieve an assembly.

Although the layout of the operating components on the front panel as described above is done with the assumption of a right-handed operator, the operator of the radio equipment or the like is naturally not necessarily right-handed, and might have lost the use of the right hand for reason of some disability or injury, making operation extremely difficult.

Additionally, in mobile radio equipment installed in a vehicle, with restrictions in the installation location, there are cases in which fixing the location of operating components results in a worsening of ease of operation.

In view of the above-noted situation, although there is a significant need for placement of operating components to accommodate individual operating conditions, with the

operating components

105 assembled to the panel board 107 as noted above, it is not possible to freely change the layout positions of the operating components 105 on the front panel 108. If an attempt is made to change the layout positions, it would be necessary to change the conductive path layout of the panel board 107 and the PCB 102 as well, the result being that only a made to order product could accommodate these changes, this product being highly costly.

In much recent electronic equipment, operating input signals are captured by a microcomputer circuit, which is caused to perform the prescribed control functions, so that operating components having the same attributes often have common specifications.

Thus, in applying a plurality of the same type of operating components, the shapes thereof are in common, and the associated panel holes are the same shape.

Accordingly, it is an object of the present invention, in view of the above-noted problems and the commonality of operating components, to provide a system that enables a maximum of freedom in layout positioning of operating components onto a front panel, in accordance with the operating conditions of a piece of electronic equipment.

SUMMARY OF THE INVENTION

The present invention is a operating component placement system for electronic equipment in which there are groups of parts of the same type of a plurality of operating components disposed on a front panel and in which the holes therefor have a common shape, this system having a panel board having connectors on the front surface corresponding to each of the operating components and a connection circuit for the purpose of connecting terminals of each connector to prescribed input terminals of an electronic circuit, and assembly units for connecting one end of a cable to terminals of a connector connected to the connector on the panel board side and the other end of the cable to individual operating components, wherein the cable length of each assembly unit associated with a group of operating components of the same type and form is made longer than the maximum distance between the connector to be connected to that operating component group on the panel board and the mounting position of that operating component group on the front panel, thereby enabling selection of the mounting position of the operating component of the same type and form on the front panel.

In the present invention, operating components are grouped into assembly units along with a cable and connector, with each operating component being connected, via the cable of its assembly unit, to a corresponding function connector on the panel board side, the cable of an assembly unit for a group of operating components of the same type and form being of a length that allows accommodation of the distance from the mutual connector-to-connector connection position to a selected mounting position of the operating component on the front panel.

Thus, it is possible for a group of operating components of the same type and form to arbitrarily select from each hole for formed in the front panel for this operating component group and to mount the operating components into the selected holes, thereby enabling free selection of the layout on the front panel of operating components for various functions in accordance with the operation conditions of the electric equipment.

In the present invention, because assembly groups are formed for each of the operating components, it is desirable that a common method of mounting of the operating component to the front panel be adopted. However, if small boards, in which holes of a common outer shape for passing the operating components are formed are fixed to the front surface side of the operating components of each assembly unit, and a tongue is bent at positions of each operating component on the rear surface of the front panel so as to form a common holding mechanism for grabbing the small boards, it is possible to mount each operating component using a common holding method.

Additionally, with regard to the above-noted holding mechanism, if a metal sheet on which a mounting part for operating components is formed by a pressing operation is joined to the rear surface side of a main panel, and if this metal sheet has holes into which the small boards fit at positions for mounting each operating component on the main panel and tongues formed so as to protrude toward the holes, these tongues being bent toward the rear surface side, it is possible to simplify the manufacturing and assembly processes.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present invention will be better understood by reading the description of exemplary embodiments to follow, making reference to the accompanying drawings, of which: [0026]
FIG. 1 is an exploded perspective view showing constituent elements of a radio received to which an embodiment of the present invention is applied (with the top and bottom covers removed); [0027]
FIG. 2 is a front elevation showing the functional placement of operating components on a front panel; [0028]
FIG. 3 is a drawing showing the condition of mounting operating components (rotary encoders and potentiometers) onto a front panel, with (A) and (B) being rear and side views thereof; [0029]
FIG. 4 is a rear view showing the condition of mounting operating components (pushbutton switches) onto a front panel; [0030]
FIG. 5 is an outer perspective view of a radio receiver; and [0031]
FIG. 6 is an exploded perspective view showing constituent elements of a radio receiver.[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

An embodiment of an operating component placement method according to the present invention is described in detail below, with references made to the drawings FIG. 1 to FIG. 4. [0033]
In FIG. 1, which is an exploded perspective view of constituent elements of a radio receiver (with the top and bottom covers removed), the reference numeral [0034] 1 denotes a die-cast chassis, 2 is a PCB onto which is packaged an electronic circuit, 3 is a panel board, 4 is a front panel, and 5 is an assembly unit.
The [0035] panel board 3 is formed by a PCB, the terminals of connectors (jack side) 3 a, 3 b, 3 c, 3 d, and 3 e mounted to the front surface side thereof being connected to connector-terminated flat cable 3 f, via a conductive pattern formed on the rear surface side thereof, the connection between the connector of the cable 3 f and a connector 2 a provided on the PCB 2 making a connection between the connectors 3 a, 3 b, 3 b, 3 c, 3 d, and 3 e and operating signal input terminals of the electronic circuit.
Therefore, the [0036] connectors 3 a, 3 b, 3 c, 3 d, and 3 e serve as input ports for various operating signals, which represent such operations as change in frequency, adjustment of volume, switching of a mode or band, and adjustment of a squelch level.
In this embodiment, the [0037] overall panel board 3 is held to the die-cast chassis 1 by screws. 5 An assembly unit is fabricated for each of the operating components, one end of each cable 8 being connected to the operating components 6 a, 6 b, 6 c, 6 d, and 6 e, and the other end being terminated with the connectors (plugs) 7 a, 7 b, 7 c, 7 d, and 7 e, the connectors 7 a, 7 b, 7 c, 7 d, and 7 e being connected to the connectors 3 a, 3 b, 3 c, 3 d, and 3 e of the panel board 3. In FIG. 1, however, it should be noted that the operating components 6 c, 6 d, and 6 e and connectors 7 c, 7 d, and 7 e are shown with 3 operating components together, this being done to simplify the description, with the assembly unit 5 being separate.
The reference numeral [0038] 9 denotes an assembly unit for an LCD mounted to the front panel 4, the associated unit also being connected by a connected to the panel board 3 via a cable.
The front panel [0039] 4, as shown in FIG. 1 and FIG. 2, has formed in it mounting holes 4 a, 4 b, 4 c, 4 d, and 4 e, corresponding to the operating components 6 a, 6 b, 6 c, 6 d, and 6 e.
In this case, for example, although the [0040] operating components 6 a and 6 b are rotary encoders, the operating component 6 c is a potentiometer, and the operating components 6 d and 6 e are pushbutton switches, the operating component group (6 a, 6 b, 6 c) and the operating component group (6 d, 6 e) have the same form, so that the holes 4 a, 4 b, and 4 c in the front panel 4 have the same shape, and the holes 4 d and 4 e in the front panel have the same shape.
A main feature of this embodiment of the present invention is that a cable connection is made for all of the [0041] operating components 6 a, 6 b, 6 c, 6 d, and 6 e using the assembly unit 5, with the cable lengths for similarly formed operating component groups (6 a, 6 b, 6 c) and (6 d, 6 e) being established so as to be longer than the maximum distance from the mounting hole groups for these similarly formed operating component groups on the front panel 4 to the connector groups (3 a, 3 b, 3 c) and (3 d, 3 e) on the panel board 3.
In actuality, because there is a space formed between the [0042] panel board 3 and the front panel 4 upon assembly, lengths are made sufficient so that there is no problem in making connections to the assembly unit 5, based on this spacing.
The length of the above-noted cables is established separately for the operating component groups ([0043] 6 a, 6 b, 6 c) and (6 d, 6 e), and if the lengths are established so as to be longer than the maximum distance among the distances between all the holes 4 a, 4 b, 4 c, 4 d, and 4 e of the front panel 4 and all of the connectors 3 a, 3 b, 3 c, 3 d, and 3 e of the panel board 3, it is possible to achieve uniformity in the cable length of the assembly unit 5. For example, according to FIG. 1, because the distance between the hole 4 b of the front panel 4 and the connector 3 a of the panel board 3 (or the distance between the hole 4 a of the front panel 4 and the connector 3 b of the panel board 3) is maximum, it is possible to achieve cable length uniformity by establishing the cable lengths as this length.
By configuring each [0044] assembly unit 5 in accordance with these conditions, each of the operating components (6 a to 6 e), organized in the groups (6 a, 6 b, 6 c) and (6 d, 6 e) of operating components having a similar form, is connected separately to prescribed connectors (3 a to 3 e) on the panel board 3, and it is possible to select the placement of these operating components into the hole groups (4 a, 4 b, 4 c) and (4 d, 4 e) of the front panel 4.
That is, because the cable length of each [0045] assembly unit 5 is established in accordance with the above-noted conditions, it is possible to dress each of the cables 8 so as to enable selective mounting of each of the operating components (6 a to 6 e) at holes (4 a to 4 e) having corresponding shapes.
Therefore, for example, if the standard layout of operating components ([0046] 6 a to 6 e) on the front panel 4 for a right-handed operator is such that the operating components 6 a, 6 b, 6 c, 6 d, and 6 e are mounted into the holes 4 a, 4 b, 4 c, 4 d, and 4 e, respectively, of the front panel 4, if layout of the operating components on the front panel 4 is to be done for a left-handed person, the cables 8 of the assembly unit 5 can be rearranged so as to reverse the mounting positions of the operating components 6 a, 6 b, 6 c, 6 d, and 6 e in a left-to-right symmetrical manner with the standard layout.
If the input signal functions corresponding to the [0047] connectors 3 a, 3 b, (3 c), (3 d), and (3 e) on the panel board 3 are Ra, Rb (Va, Vb, Vc), (Sa1, Sa2, Sa3), and (Sb1, Sb2, Sb3), the knob layout on the front panel 4 for a left-handed operator would be as shown in FIG. 2, this exhibiting left-to-right symmetry with respect to the standard layout, which is shown in FIG. 1.
As a result, because it is possible to perform a left-to-right reversal of other knobs and switches with respect to the standard layout, it is only necessary to change the assembly method of the [0048] assembly unit 5 at the stage of assembling the product, thereby making it possible to provide a model that accommodates a left-handed operator, as if the model had been made to order for that purpose.
In addition to the standard layout and the layout for a left-handed operator, because the hole groups ([0049] 4 a, 4 b, 4 c) and (4 d, 4 e) on the front panel 4 corresponding to the groups of operating components (6 a, 6 b, 6 c) and (6 d, 6 e) having similar form are formed with a common shape, it is possible within that restriction to achieve an arbitrary layout of the operating components, thereby enabling accommodation of even more detailed operating conditions.
While the front surface of a front panel usually has functional markings near knobs or the exposed parts of operating components thereof, in the case of this embodiment, because the placement of the [0050] operating components 6 a, 6 b, 6 c, 6 d, and 6 e is changed in accordance with operating conditions, it is not appropriate to print such functional markings onto the front panel as was done in the past.
With regard to this problem, it is possible to pre-fabricate printed or embossed seals or plates with function names thereon, and to affix these seals or plates in accordance with the layout of the [0051] operating components 6 a, 6 b, 6 c, 6 d, and 6 e for the various functions, thereby providing a marking of the functions of the respective knobs and switches.
The method of mounting the [0052] various operating components 6 a, 6 b, 6 c, 6 d, and 6 e to the front panel 4 is as follows.
In this embodiment, the [0053] operating components 6 a, 6 b, 6 c, 6 d, and 6 e are part of each assembly unit 5, and while it is possible even at the assembly stage to treat these assembly units as units, because there is a uniform connector connection made to the panel board 3, it is also desirable to have a uniform mounting method for the operating components, thereby simplifying the assembly process.
Given the above, as shown by the [0054] reference numerals 11 and 12 in FIG. 1, which represent the operating components 6 a and 6 d, respectively, small boards are fixed to the front surface side of each of the operating components 6 a, 6 b, 6 c, 6 d, and 6 e , these small boards 11 and 12 being mounted to the front panel 4 as adaptors.
In this arrangement, the [0055] small board 11 is held in place by through insertion of rotating shafts of the rotary encoders or potentiometers of the operating component group (6 a, 6 b, 6 c), and small board 12 is held in place by insertion therethrough of the buttons of the pushbutton switches of the operating component group (6 d, 6 e).
While use of adhesion is the simplest holding method, it will be understood that it is also possible to adapt another method, making using the structure of the operating components. [0056]
The front panel [0057] 4 is formed by joining with a mounting panel 14 fabricated by pressing operations performed on the sheet metal panel 13.
In this case, the mounting [0058] panel 14 has formed on it holes in which the small boards 11 and 12 are internally fitted, and tongues formed so as to protrude toward the holes, and bent toward the rear surface side.
More specifically, as shown in FIG. 3 and FIG. 4, which show the rear surface (A) and front surface (B) views of the condition of mounting the operating component groups ([0059] 6 a, 6 b, 6 c) and (6 d, 6 e) to the front panel 4, the reference numeral 15 denotes a hole in the mounting panel 14 into which the small boards 11 and 12 are fitted, and the tongues 16 shown in these drawings are formed as one with the mounting panel 14 at the center parts of the four sides of the holes 15.
As shown in FIG. 3 (B) and FIG. 4 (B), the [0060] tongues 16 of the mounting panel 14 are bent vertically toward the rear surface before mounting of the operating components 6 a, 6 b, 6 c, 6 d, and 6 e, and with the small boards 11 and 12 of the operating components 6 a, 6 b, 6 c, 6 d, and 6 e fitted into the holes 15, the tongues are then bent inward, so as to hold the small boards 11 and 12 to the front panel 4.
It is therefore possible to mount the [0061] operating components 6 a, 6 b, 6 c, 6 d, and 6 e using a common holding method, thereby simplifying the processing of assembly, compared with the method of mounting each operating component separately.
Additionally, although, as shown in FIG. 3 and FIG. 4, the [0062] small boards 11 and 12 are fit loosely into the holes 15, it is alternately possible to establish this as a tight fit, so as to accurately position the operating components 6 a, 6 b, 6 c, 6 d, and 6 e by the holes 15, and to form a slit in both sides of the tongues 16, so that the tongues 16 can be bent inward from the outside of the holes 15.
By adopting the configuration described above, an operating component placement system for electronic equipment according to the present invention achieves a number of effects. [0063]
In a first embodiment of the present invention, in a piece of electronic equipment having a plurality of operating component disposed on a front panel which includes a group of components having the same form, without changing the circuit configuration of the panel board or the PCB, it is possible to freely change the mutual positions of operating components having similar forms on the front panel, thereby facilitating the assembly of a piece of equipment that meets specific desires for ease of operation by not only an operator having a specific dominant hand (for example, a left-handed user) but also a user with impaired hand use. [0064]
In alternate embodiments of the present invention, by adopting a common mounting method for operating components of each assembly unit to a front panel, it is possible not only to make connector connections at a far-end of each assembly unit to a panel board, but also to simplify the assembly process. [0065]
While several forms of the present invention have been illustrated and described, it will also be apparent that various modifications may be made without departing from the spirit and scope of the invention. Furthermore, while the preferred embodiment of the invention has been described in terms of the dimensions and cross-sectional configurations of various components of the invention it is understood that the invention is not intended to be limited to those specific dimensions or configurations but is to be accorded the full breadth and scope of the claims appended hereto. [0066]

Claims

What is claimed is:

1. In a piece of electronic equipment including, among a plurality of operating components disposed on a front panel, a group of operating components having the same form, and a front panel with holes for said operating component having a common shape, an operating component placement system comprising:

a connector corresponding to said operating components at a front surface side;

a panel board comprising a connection circuit for making connection of terminals of each said connector at a rear surface side to prescribed input terminals of an electronic circuit; and

assembly units with one end of a cable connected to a connector terminal connected to a connector at said panel board side and another end of said cable connected to said separate operating components, wherein

a length of a cable of each assembly unit for each operating component group of operating components having the same form is made longer than a maximum distance from a connector to which an operating component group is to be connected on said panel board side and a mounting position of said operating component group on said front panel, thereby enabling selection of a mounting position onto said front panel of operating components having the same form.

2. An operating component placement system according to claim 1, wherein

small boards having a common outer shape and a hole for passing through of an operating component are held to a front surface of operating components of each assembly unit,

a tongue is bent at a mounting position of each operating component on the rear surface of said front panel is bent so as to provide a common holding mechanism for grabbing said small boards, and

each operating component is mounted to said front panel using a common holding method.

3. An operating component placement system according to claim 2, wherein

each holding mechanism on said front panel rear surface is formed by joining a metal sheet, onto which is formed by a pressing operation a mounting part of each operating component, with the rear surface of a main panel, this metal sheet having formed on it, at mounting positions for each operating component onto the main panel, holes into which said small board fit, and tongues protruding toward said holes, wherein said tongues are bent toward the rear surface side, and wherein said small boards of said operating components are fitted thereinto and said tongues are bent toward said small boards so as to mount said operating components to said main panel.