JPS639169Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a telephone configuration in which a novel keyboard for inputting line selection and service function requests using a push switch is mounted on the telephone housing.

In recent years, there has been an increasing demand for high-performance telephones that have multiple keys in addition to a rotary dial (or push-button dial) on the top of the telephone housing to enable voice reception, re-dialing, repertoire dialing, etc. be.

In particular, so-called electronic button telephone systems that apply electronics technology can have more service functions than conventional button telephone systems, and therefore telephones for electronic button telephone systems require a large number of keys. shall be.

In this case, it is desirable that the plurality of keys can be arranged conveniently for selection operations, and that the keys are dust-proof and aesthetically pleasing.

The present invention aims to provide a means for realizing a telephone equipped with a keyboard suitable for such purposes.

In conventional button telephone system telephones, a complex keyboard consisting of self-locking keys is used to manually select the central office line, extension, hold, etc. Due to its mechanical characteristics, the key top is It protrudes high, making it easy for dust to get in through the gap between the key and the face plate on the top of the phone case.
It also had some aesthetically undesirable flaws.

In an electronic button telephone system constructed by applying electronics technology, the keyboard does not need to be self-locking because inputs made by pressing keys can be easily memorized by the electronic circuit.

Therefore, the telephone of the present invention includes a plurality of simple structure push switches and a plurality of light emitting elements, each having a simple structure and having elastic conductivity, which can be operated with a finger from a normal position to a distorted position, and which elastically returns to the normal position when the force is removed. A printed wiring board assembly that is fixed to a printed wiring board, an actuator that maintains interlock with the key top of the push switch and is placed on the top surface of the key top, and a dummy mold that is installed at a location corresponding to the push switch that does not require the placement of the push switch. A box, a window hole into which the head of the actuator and the mold box are respectively inserted, and a mold frame having a small circular hole in a portion corresponding to the head position of the light emitting element and fixed to the printed wiring board assembly, and the upper surface of the mold frame. The line number, function symbol, related information display field, etc. for instructing the finger press operation of the push switch are printed with colored coating on the back side, and it has an uncoated vertically long and short semi-transparent window for visually checking the ignition status of the light emitting element. A keyboard consisting of a cover sheet in which a flexible sheet-like member is adhesively coated is mounted on the upper surface of a telephone casing.

As a result, it is possible to provide a telephone having a convenient arrangement for selecting the push switch, and a keyboard that is dust-proof and aesthetically pleasing.The means for realizing this will be explained in detail with reference to the drawings.

Figure 1 shows the cross-sectional structure of an example of a single known push switch.
When the key top 1-1 is pressed down, the central part of the metal diaphragm (shallow bowl-shaped elastic body) 2 is pressed down by the protrusion 1-1' of the key top 1-1,
The inner surface of the diaphragm 2 is curved as shown by the broken line in the figure and comes into contact with the fixed contact 3. This creates a conductive path between the fixed contact 3, the metal diaphragm 2, and the fixed contact 4 (the fixed contact 5 is always electrically connected to the fixed contact 4 through the diaphragm 2). When the force pushing down the key top 1-1 is removed, the metal diaphragm 2 returns to its normal position due to its self-resilient elasticity and pushes up the protrusion 1-1' of the key top 1-1 to return it to its original position.

The fixed contacts 3 and 4 are in contact with contact terminals 3' and 4', respectively, which pass through the bottom of the outer casing 6 of the push switch.

A push switch with the structure shown in Figure 1 allows the operator to sense with his/her finger whether or not the vertical movement (stroke of about 0.5 mm) is reliably performed based on the elasticity of the metal diaphragm, so it is suitable for use as a telephone key. Appropriate for

In order to mount several to several tens of push switches as described above in a telephone used in a high-performance telephone and an electronic button telephone system, it is desirable to have a configuration in which these can be attached to the top surface of the telephone housing as a single integrated keyboard.

The present invention allows the push switch to be placed appropriately depending on the type of function and line scale (number of central office lines and extension lines in the case of an electronic button telephone system) required for the telephone, and has excellent dust resistance and aesthetics. The present invention provides a telephone equipped with a keyboard, and will be described below with reference to embodiments.

FIG. 2 is a schematic diagram illustrating the structure of a keyboard applied to a telephone according to the present invention.

In the figure, numeral 1 is a push switch similar in structure to that explained with reference to FIG. 1, and numeral 12 is a light emitting element for converting an electrical signal into light, and it is preferable to use a light emitting diode from the viewpoint of brightness.

Reference numeral 13 denotes a printed wiring board on which push switches 1 and light emitting elements 12 are arranged in a matrix, and the contact terminals of the push switches and the lead wire terminals of the light emitting elements are soldered to the printed wiring on the lower side through through holes of the printed wiring board. Ru. By soldering, the push switch and the light emitting element are each mechanically fixed on the printed wiring board.

The rectangles and small circles indicated by broken lines on the printed wiring board indicate the positions for arranging the push switches and light emitting elements in a matrix, respectively.
Although not shown in the figure, through holes are provided through which the contact terminals of the push switch and the lead wire terminals of the light emitting element are passed.

Although the illustration shows an example of a matrix arrangement of 3 rows and 5 columns, it goes without saying that it can be realized with any number of rows and columns.

Also, it does not necessarily have to be a matrix arrangement.
For example, a staggered arrangement may be used.

Reference numeral 14 denotes a keyboard frame made of a thermoplastic resin material, which includes a plurality of push switches and a plurality of light emitting elements mounted on a printed wiring board, and is bonded to the printed wiring board to constitute an integrated keyboard. , its shape is hollow at the bottom.

As shown in the figure, a rectangular window hole 18 is provided above the key top 1-1 of the push switch 1, and a small circular hole 19 is provided above the head of the light emitting element 12. The rectangular window hole 18 and the small circular hole 19 are both located perpendicularly above the mounting position of the push switch 1 and the light emitting element 12 on the printed wiring board.

Reference numeral 15 denotes a flexible cover sheet made of, for example, a transparent polyester material (so-called plastic), and its thickness is suitably about 0.1 mm from the viewpoint of flexibility and self-recovery when pressed by a finger.

The upper surface of the cover sheet 15 is pre-treated with anti-glare treatment, and the lower surface is provided with box marks for indicating finger press positions for a plurality of push switches, line numbers, function symbols, and other related information display fields (described later).
is printed with colored coating.

These colored and printed marks, numbers, symbols, etc. can be seen through the transparent polyester material and can be easily seen by the operator from the upper surface of the cover sheet.

Reference numeral 16 denotes an actuator for the push switch 1, which is placed on the top surface of the key top 1-1 of the push switch, and its convex head fits into the window hole 18 of the keyboard frame 14.

When the operator presses a portion of the frame 14 corresponding to the window hole 18 from the upper surface of the cover sheet 15 with a finger, the flexible cover sheet 15 bends downward and pushes the actuator 16 down.

This actuator 16 is molded to have a protrusion 16' below the center of its lower surface.

The projection 16' presses down on the central part of the upper surface of the key top 1-1 of the push switch 1, and a conductive path is closed between the two contacts 3 and 4 of the push switch according to the principle explained in FIG.

The presence of the protrusion 16' serves to ensure that the push switch 1 operates even if the pressure position of the actuator 16 on the top surface of the head deviates from its center.

Reference numeral 17 denotes a dummy mold box, which is a molded product whose external dimensions correspond to that of the push switch 1 and the actuator 16 stacked thereon, and although its material is the same as that of the frame 15, it is also different. It's okay to be hot.

This dummy mold box 17 is provided between the window hole 18 of the frame 15 and the printed wiring board 13 at a location where the push switch 1 is not mounted, so that even if the operator presses a corresponding part from the upper surface of the cover sheet 15 with his/her finger, the The sheet 15 does not bend downward.

By doing so, it becomes easy to construct various keyboards having different numbers and arrangements of keys by using only one type of mold frame 14 and one type of printed wiring board 13.

Here, it is necessary to prepare the same number of types of cover sheets 15 as types of keyboards, but frame 1
This method is much more economical than increasing the number of types of printed wiring boards 13 and 4, and is extremely useful especially in fields with diverse line capacities and required service functions, such as electronic button electronic systems.

As can be seen from FIG. 2, to assemble the keyboard, first, the cover sheet 15, on which markings indicating finger press positions, line numbers, function signals, etc. are colored and printed, is glued to the top surface of the frame 14. make something.

We will call this a frame with a seat.

Next, the necessary number of push switches 1 and light emitting elements 12 are assembled by soldering the contact terminals of the push switches 1 and the lead wire terminals of the light emitting elements 12 to the printed wiring on the lower surface through the through holes of the printed wiring board 13. Make something that is fixed in place. This will be called printed wiring board assembly.

To assemble the keyboard, place the seeded frame upside down and insert its window hole 18 actuator 1.
6 and the dummy mold box 17 are both inserted upside down. Of course, the actuator 16 is inserted into the frame window hole 18 where the push switch 1 is mounted, and the dummy mold box 17 is inserted into the frame window hole 18 where the push switch 1 is not mounted.

Next, the printed wiring board assembly to which the push switch 1 and the light emitting element 12 are fixed is turned upside down and connected to the frame 14. Printed wiring board 1 for connection
The coupling position is determined so that the groove 20 provided around the frame 14 and the protrusion 21 provided at the bottom of the frame 14 fit together. Further, although not shown in the drawings, the frame 14 and the printed wiring board assembly are tightened from the back side of the printed wiring board 13 using screws or bolts to form an integrated keyboard.

Next, the printing on the cover sheet 15 to be adhesively coated on the upper surface of the mold frame 14 will be explained.

In the present invention, the cover sheet 15 includes, in addition to position marks, line numbers, and function signals that clearly indicate finger presses, there is also a field for indicating related items in which the user can write by hand or attach labels for supplementary guidance. It is placed. In this case, it is predicted that each time you press the cover sheet 15 with your finger, your finger will come into contact with the marking field and erase the entry or printed label, so after pasting the entry or label, move the cover sheet 15 A transparent protective label 35' made of the same material is overlaid and pasted to prevent erasure.

These marks, numbers, symbols, display fields, etc. are finished by coloring and printing from the bottom surface of a plastic cover sheet whose top surface has been treated with anti-glare treatment.

FIG. 3 is a diagram for explaining one embodiment of the cover sheet 15, and is shown as a partial diagram for convenience. A is a partial view of the bottom surface, and b is a cross-sectional view thereof.

In FIG. 3, reference numeral 30 is a thin transparent plastic base material, and the upper surface thereof is coated with a chemically treated anti-glare film. When the film is coated and adhered to the upper surface of the frame 14, it will not be permanently displaced due to the elasticity of the film itself even if it is repeatedly pushed down approximately 0.5 mm from the upper position of the window hole 18 (when not in use) To ensure that the top surface of the cover sheet is flat, the thickness of the film is 0.1 mm.
The position is appropriate.

In the partial view a of the lower surface of the cover sheet 15,
Reference numeral 31 denotes a translucent window for allowing the ignition or non-ignition state of the light-emitting elements to be visually confirmed from the upper surface of the cover sheet 15; this portion is not colored at all.

The translucent window 31 has a vertically long and short shape so that the telephone user can easily see it from diagonally above.

32 is a box mark for displaying the mounting position of the push switch 1, and 33 is a line number or function display symbol (the diagram shows the case of line number 4, but in the case of a function display, for example, the horizontally reversed letters of "HOLD") ), all of which are colored and printed.

Reference numeral 34 denotes a band-shaped mark indicating the type of use of a plurality of keys on the keyboard, and it is particularly desirable to print the mark in a dark color. (To clarify type identification). Reference numeral 35 denotes a related matter display column provided so that the user can write in it by hand as an auxiliary guide, and is preferably printed in light color. (Handwritten text on the top surface of the cover sheet is easy to see).

Other parts in Figure 3a, namely 31, 3
The portion 36 excluding 2, 33, 34, and 35 is the background color when viewed as a keyboard,
It can also be a plain single color or patterned with wood grain or other designs.

The color coating printing on the cover sheet 15 is completed by repeating the color coating printing several times as shown in cross-sectional view b.

In the embodiment of FIG. 3, the enclosure mark 32,
The line number (or function display symbol 33 and related matter display field 35) are printed with the same light colored coating, and the band-shaped mark 34 indicating the usage type is printed with dark colored coating.

For example, use brown for the central line selection key, orange for the extension selection key, and green for function selection).

After these colored coatings and prints, the ground color 36 (or pattern) of the cover sheet is colored and printed, and further, an opaque black coating 37 is applied to the entire back surface of the cover sheet except for the translucent window 31. Due to this black coating printing, the color of the frame and the window holes and small circular holes on the top surface of the frame are not visible from the top surface of the keyboard, which is aesthetically effective.

FIG. 4 shows a completed external view of the keyboard constructed as described above.

In the figure, 13, 14, and 15 are printed wiring boards, frames, and cover sheets, respectively; 21 is a protrusion for fitting the frame and the printed wiring board; 22 is a frame mounting portion for attaching the frame 14 to the phone case; 23 is a ribbon cable, and 24 is a connector. Printed wiring on the bottom of the printed wiring board (not shown)
The contact lead terminals of a plurality of push switches are electrically conducted through a ribbon cable 23 to a connector 24 through which they are electrically connected to the circuitry within the telephone.

Fig. 5 is an external view of a specific example of a key telephone system in which a keyboard according to the present invention is mounted. The figure shows a keyboard 43 and dials 42 (a rotary dial is shown in the figure, but a push-type dial can also be used) arranged on the top surface of a telephone case 41, but there are no special electrical constraints on their arrangement, and there is an advantage in that the case structure design can be simplified.

FIG. 6 illustrates a specific example of the electrical connection relationship between a plurality of keys on the keyboard and a circuit within the telephone.

In the figure, 40 is a telephone circuit, including a transmitter T,
The main part of the electronic button telephone system is composed of circuits similar to those of a normal telephone, including the handset R, the circuit network NW, the switch HS1 and HS2, the dial (Di is the impulse contact of the dial, and Ds is the short-circuit contact of the dial), etc. It is connected to the central office line via a telephone switch (not shown) inside the device.

43 is a printed wiring board 13, a ribbon cable 23,
1 is a keyboard circuit diagram illustrating the main electrical circuits of a keyboard having a connector 24 and a connector 24;

The contacts shown above 43 represent the contacts of the mounted push switch, and the portions shown by broken lines correspond to the mounting locations of the dummy mold box.

Regarding the circuit of the light emitting element 12 shown at the bottom of 43, an example is shown in which no printed wiring is applied to the unmounted parts (broken line circles in the figure), but for the total mounting capacity of the light emitting element 12 It is also possible to provide printed wiring in advance.

Reference numeral 44 denotes a control circuit inside the telephone, which monitors the open/close states of the contacts of the keyboard circuit, identifies the line selection number and function request input, and sends the information to the main device side via the transmitter/receiver circuit 45. It temporarily stores and identifies information that comes in from the transmitter/receiver circuit 45, and controls other circuits such as a receiver amplifier circuit and a tone ringer circuit (both not shown).
The ignition of the light emitting elements in the illustration is also controlled by the control circuit 44.

As can be understood from the above explanation, the telephone according to the present invention enables convenient positional arrangement of push switches for line and function selection, and is a telephone with a dust-proof and aesthetically pleasing keyboard mounted on the top of the case. , can be applied to telephones of electronic key telephone system. It can also be applied to high-performance telephones, including loudspeaker reception, re-dialing, repertoire dialing, etc., and its uses are wide.
It is especially adaptable to the production of a wide variety of telephones.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional structural diagram of a known push switch; Fig. 2 is a schematic illustration of the structure of a keyboard applied to a telephone according to the present invention; Fig. 3a is a partial view of a cover sheet forming the upper surface of the keyboard, viewed from below. Figure b is a sectional view of cover sheet a, Figure 4 is a completed exterior view of the keyboard, Figure 5 is an exterior view of a specific example of a telephone equipped with a keyboard, and Figure 6 is a diagram showing the multiple keys of the keyboard and the internal circuit of the telephone. FIG.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of push switches that can be manually operated from a normal position to a distorted position and elastically return to the normal position when the force is removed, and a plurality of light emitting elements that convert electrical signals into light. and a printed wiring board assembly in which the contact terminals of the push switch and the lead wire terminals of the light emitting element are connected to the printed wiring through the through holes of the printed wiring board, and the top surface of the key top is connected to the key top of the push switch. A dummy mold box is installed at a location corresponding to the push switch where the push switch does not need to be placed, and a window hole into which the head of the actuator and mold box is inserted is located at the location corresponding to each head position. The mold frame has a small circular hole in the area corresponding to the head position of the light emitting element and is fixed to the printed wiring board assembly, and the line number, function signal, and related information display column is printed from the back side on the top surface of the mold frame. A keyboard is attached to the top surface of the phone casing, and is made up of a cover sheet made of a flexible sheet-like member that is printed with a colored coating and has an uncoated vertically rectangular translucent window for visual confirmation of the ignition status of the light emitting element. A telephone characterized by being implemented in. (2) Anti-glare treatment is applied to the upper surface of the transparent plastic cover sheet, white color coating is printed on the area corresponding to the related information display area, and line number and function signal indicators are displayed on the back of the cover sheet. A telephone according to claim 1 of claim 1, characterized in that the telephone is printed with a colored coating, and is further coated with a plain colored coating printing or a colored coating printing with a pattern on the entire back surface. (3) A request for utility model registration characterized by writing the necessary display characters or pasting a label on the surface of the related matter display field, and then pasting the cover sheet and a transparent protective label made of the same material on top of it. Telephones listed in scope (2).