JPH0467644B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] A keyboard testing device that tests one pushbutton switch at a time has a limit in shortening the testing time. Therefore, the test time is reduced by testing a plurality of push button switches at the same time.

[Industrial application field]

The present invention relates to a keyboard testing device comprising a large number of pushbutton switches, and more particularly to a testing device for automatically measuring the operating position of a pushbutton switch.

Keyboards used in various information processing devices are composed of a large number of push button switches, and by pressing these push button switches, an operator can input various information into the information processing device. However, if the pressing force and operating position differ greatly from push button switch to push button switch, the switch will not operate even if the push button switch is intended to be pushed down, leading to input errors. Therefore, when the keyboard assembly is completed, the push button switch is pressed and the pressing force and operating position are measured.

Testing of such keyboards is automatically performed using a keyboard testing device using a numerical control device, but as the number of keyboards manufactured increases, there is a need to shorten the testing time, and a keyboard testing device that can achieve this is required. development is desired.

[Conventional technology]

FIG. 4 is a block diagram showing a conventional keyboard testing device, and FIG. 5 is a block diagram showing the circuit configuration of a measuring section.

In order to measure the operating position of a pushbutton switch in a keyboard test, for example, it is necessary to measure the change in the pressing distance or the change in the pressing force from when the pushbutton switch starts being pressed until the contacts close.

As shown in FIG.
2, and a measuring section 3 that tests the operation of the push button switch 12 based on measurement commands output from the numerical controller 2. The numerical controller 2 is equipped with a keyboard 1. do
An XY table 21, an X axis motor 22 that moves the XY table 21 in the X axis direction, a Y axis motor 23 that moves the XY table 21 in the Y axis direction,
It is composed of a numerical control device main body 24 that controls an X-axis motor 22 and a Y-axis motor 23.

On the other hand, the measurement unit 3 includes a push-down mechanism 31 that can measure changes in the push-down distance and push-down force from the time the push button starts until the contacts close, and a contact operation that detects when the contacts of the push button switch are closed. Detection section 32
and a measuring device main body 4 that calculates the operating position of the push button switch from signals input from the push-down mechanism 31 and the contact operation detection section 32.

The push-down mechanism 31 includes a shaft 34 that moves up and down to push down the push button switch, a motor 35 that drives the shaft 34 and outputs information indicating the amount of movement of the shaft 34, and detects the pushing force of the push button switch that changes as the push button is pressed. The contact operation detection section 32 has an encoder 37 and a decoder 38 as shown in FIG.
and a microcomputer 39.

When the push button switches are positioned in accordance with the preset order, the numerical control device 2 outputs a measurement command to the measuring section 3, the motor 35 of the push mechanism 31 is started, and the push button switches begin to be pressed. Information indicating the amount of movement of the shaft 34 is input from the motor 35 to the measuring instrument main body 4, and information indicating the pressing force of the push button switch that changes as the push button is pressed is input to the measuring instrument main body 4 from the pressure sensor 36.

On the other hand, the microcomputer 39 sends a signal to the encoder 37 and decoder 38 indicating the intersection of the broken lines 11 arranged in a matrix, regardless of the order of the pushbutton switches to be positioned, that is, the position signal of the pushbutton switch connected to the intersection. are sequentially output, and the encoder 37 and decoder 38 connect the wiring 11 arranged in a matrix based on the position signal.
is selected, and the position of the push button switch that is pressed down by the push-down mechanism 31 and the contact points are closed is searched. When the position of the push button switch is detected, the microcomputer 39 translates the position signal into a key code assigned to the push button switch, and outputs it to the measuring machine main body 4 together with a strobe signal indicating that the contacts are closed.

The measuring device main body 4 includes a position measuring counter 4 that counts information input from a motor 35 as shown in FIG.
1. An amplifier circuit 42 that amplifies information input from the pressure sensor 36, a reference voltage 43 and a comparator 44 for detecting the position at which the push button switch starts to be pressed, and a memory circuit that memorizes the position at which the push button switch starts to be pressed. 45, and a memory circuit 46 for storing the contact closure position according to the strobe signal input from the contact operation detection unit 32, and the contact closure position stored in the memory circuit 46 by the arithmetic circuit 47. By calculating the difference from the push start position stored in the memory circuit 45 and comparing it with the upper and lower limits and values stored in the dictionary file 49, the determination circuit 48 determines whether the push button switch under test is good or bad. Determine.

[Problem that the invention seeks to solve]

However, even if attempts are made to shorten the time it takes for the numerical control device to position the pushbutton switches according to a preset order, or the time it takes for the measurement unit to measure the operating position of the pushbutton switches based on a measurement command, it is possible to
The conventional method of measuring individual pushbuttons has a limit in terms of time reduction, and has the problem of requiring a lot of time to test keyboards made up of a large number of pushbutton switches.

[Means for solving problems]

FIG. 1 is a block diagram showing a keyboard testing device of the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem is caused by the push-down mechanism 51 and the contact operation detection unit 5.
2 and a measuring device body 6, and a numerical control device 2 that positions a push button switch in a pressing mechanism 51 according to a preset order. Press the test pushbutton switches 12 at the same time and receive a push distance signal corresponding to the pushdown distance and the pushbutton switch 1 to be tested that was pushed down.
between the contact points of the push-down mechanism 51 that outputs a push-down force signal corresponding to each push-down force of 2, and the plurality of push button switches 12 to be tested pressed by the push-down mechanism 51, respectively, indicating that the contacts are closed. A contact operation detection unit 52 that outputs a closing signal and a push-down mechanism 5
1 and the contact closure signal output from the contact operation detection section 52, each push button switch 1 under test is
This problem is solved by the keyboard testing device of the present invention, which is provided with a measuring device main body 6 for calculating the operating position of No. 2.

[Effect]

In FIG. 1, a plurality of pushbutton switches 12 to be tested are pressed simultaneously on the keyboard testing device, and a push-down force signal corresponding to the push-down force of each push-button switch 12 to be tested and a push-down distance signal corresponding to the push-down distance are output. By providing the push-down mechanism 51 and the contact operation detection unit 52 that outputs a contact closure signal indicating that the contacts of the plurality of push button switches 12 under test are closed, the time required to test the keyboard can be reduced. A significant reduction can be achieved.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that FIG. 2 is a block diagram showing the circuit configuration of the contact operation detection section, and FIG. 3 is a block diagram showing the circuit configuration of the main body of the measuring machine.

In FIG. 1, the keyboard testing device of the present invention includes a numerical control device 2 that sequentially positions the pushbutton switches 12 according to a preset order, and an operation of the pushbutton switches 12 based on measurement commands output from the numerical control device 2. The measuring section 5 is equipped with a measuring section 5 for testing a plurality of push button switches 12 to be tested.
(three in the figure) are pressed at the same time to output a pressing force signal corresponding to the pressing force of each push button switch 12 under test and a pressing distance signal corresponding to the pressing distance; a contact operation detection unit 52 that outputs a contact closure signal indicating that each of the contacts of the test push button switch 12 is closed;
It includes a measuring device main body 6 that calculates the operating position of the push button switch from signals input from the push-down mechanism 51 and the contact operation detection section 52.

The push-down mechanism 51 includes a plurality of shafts 34 that move up and down to push down the push button switch, and a motor 35 that simultaneously drives the plurality of shafts 34 and outputs information indicating the amount of movement of the shafts 34, which changes as the button is pressed. A plurality of pressure sensors 36 detecting the pressing force of the push button switch.
It is made up of.

As shown in FIG. 2, the contact operation detection section 52 includes an input terminal 53 connected to the wiring 11 arranged in a matrix of the keyboard, and a plurality of sets of inter-contact closure detection circuits 54 whose input sides are connected in parallel. The inter-contact closure detection circuit 54 is made up of a selection switch group 55 corresponding to each wiring 11, a photocoupler 56, and a one-shot multiplier 57.

For example, wires 11 (6 wires x 2) arranged in a matrix of the keyboard shown in FIG. 5 are connected to an input terminal 53, and matrix wires 1 and 6
push button switches (positions 1 and 6) connected to the intersection of
A push button switch (positions 3 and 6) connected to the intersection of matrix wirings 3 and 6, and a pushbutton switch (positions 3 and 6) connected to the intersection of matrix wirings 3 and 4.
4) When detecting the contact closure at the same time, the selection switch group 55 of the first contact closure detection circuit 54a
a selects matrix wiring 1 and 6, and selects the selection switch group 55b of the second contact closure detection circuit 54b.
selects the matrix wirings 3 and 6, and the selection switch group 55c of the third contact closure detection circuit 54c selects the matrix wirings 3 and 4.

The power supply Va and the ground line are applied to the matrix wiring through the photocoupler 56a of the first contact closure detection circuit 54a and the selection switch group 55a.
Ga, a photocoupler 56b of the second contact-to-contact closure detection circuit 54b, a power supply Vb applied to the matrix wiring via the selection switch group 55b, a ground line Gb, a photocoupler 56c of the third contact-to-contact closure detection circuit 54c, and Selection switch group 55c
The power supply Vc applied to the matrix wiring via
The ground line Gc and the ground line Gc are completely independent, and there is no looping through the matrix wiring or the wiring connected in parallel on the input side.

When the push button switches are positioned in accordance with a preset order, a measurement command is output from the numerical control device 2 to the measuring unit 5, the motor 35 of the push mechanism 51 is started, and the push button switches are started to be pressed.
Information indicating the amount of movement of the shaft 34 is input from the motor 35 to the measuring machine main body 6, and information indicating the pressing force of the push button switch that changes as it is pressed is input to the measuring machine main body 6 from the pressure sensor 36. .

On the other hand, the selection signal of the selection switch group 55 is inputted from the measuring device main body 6 to the contact operation detection section 52,
The inter-contact closure detection circuit 54 selects each of the wires 11 arranged in a matrix and waits. When pressed down by the push-down mechanism 51 and the contacts are closed, the one-shot multi 57 outputs a strobe signal to the measuring instrument body 6 indicating that the contacts are closed.

As shown in FIG. 3, the measuring device main body 6 includes a direction detector 61 that detects the rotational direction of the motor 35, and a position measurement counter 4 that counts information input from the motor 35.
1. An amplifier circuit 62 that amplifies multiple pieces of information input in parallel from the pressure sensor 36, a reference voltage 4 for detecting the position at which the push button switch starts to be pressed.
3 and a comparator 44, and a memory circuit 63 for storing the position at which each push button switch starts to be pressed and the position at which the contact is closed.
The arithmetic circuit 64 calculates the difference between the contact closed position stored in the memory circuit 63 and the push start position, and compares it with the upper and lower limit values stored in the dictionary file 49. At step 65, it is determined whether the push button switch to be tested is good or bad.

However, in a structure in which a plurality of push button switches are pressed at the same time, there may be no push button switches below the shaft 34 of the push mechanism 51. For this purpose, the main body 6 of the measuring device is provided with a measurement prohibition setting circuit 66, and when there is no push button switch under the shaft 34, the measurement value is invalidated by the measurement prohibition setting.

By using such a keyboard testing device, it is possible to test a plurality of pushbutton switches simultaneously, and the time required to test a keyboard can be significantly reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a keyboard testing device that can shorten testing time.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the keyboard testing device of the present invention, Fig. 2 is a block diagram showing the circuit configuration of the contact operation detection section, Fig. 3 is a block diagram showing the circuit configuration of the main body of the measuring machine, and Fig. 4 is FIG. 5 is a block diagram showing a conventional keyboard testing device, and FIG. 5 is a block diagram showing the circuit configuration of a measuring section. In the figure, 1 is a keyboard, 2 is a numerical control device, 5 is a measurement section, 6 is a measuring device main body, 11 is a wiring,
12 is a push button switch, 34 is a shaft, 35 is a motor,
36 is a pressure sensor, 41 is a position measurement counter, 4
3 is a reference voltage, 44 is a comparator, 49 is a dictionary file, 51 is a push mechanism, 52 is a contact operation detection section, 53 is an input terminal, 54, 54a, 54b, 5
4c is a contact closure detection circuit, 55, 55a, 55
b, 55c are selection switch groups, 56, 56a, 5
6b, 56c are photo couplers, 57 is one shot multi, 61 is direction detection, 62 is an amplifier circuit, 6
3 represents a storage circuit, 64 represents an arithmetic circuit, 65 represents a determination circuit, and 66 represents a measurement prohibition setting circuit.

Claims (1)

[Scope of Claims] 1. A measuring section 5 composed of a pressing mechanism 51, a contact operation detecting section 52, and a measuring device main body 6, and a pressing mechanism 5 that operates a push button switch according to a preset order.
A testing device equipped with a numerical control device 2 for positioning a plurality of push buttons 12 under test at the same time, and receiving a pressing distance signal corresponding to the pressing distance and each of the pressed push buttons 12 under test. The push-down mechanism 51, which outputs a push-down force signal corresponding to the reaction force of The contact movement detection unit 52 outputs a contact closure signal shown in FIG. A keyboard testing device comprising a measuring device main body 6 for calculating the operating position of a test push button switch 12.