CN2682404Y - Life tester for handwriting screen - Google Patents

Abstract

The utility model discloses a life tester for a handwriting screen of a PDA product, comprising a case whose leading flank and upper flank fore are open. A fixing bench is installed at the bottom of the case, and the fixing bench is provided with fixing apparatus for fixing the PDA product. A motion part comprises a drive motor and a clamp part connected with the output shaft of the motor, and the writing pencil is fixed on the clamp part and is eccentric relative to the output shaft when the life tester for handwriting screen is used to test. A support is used for supporting the motion part on the fixing bench. A control device controls the rotational speed and frequency of the motor according to the set-point. A panel is positioned behind the upper flank, comprising an input part for inputting the motor rotational speed and a display part for the displaying rotational speed and frequency.

Description

The handwriting screen life-span tester

Technical field

The utility model relates to a kind of handwriting screen life-span tester of PDA product.

Background technology

On market, can buy various PDA products at present.The PDA product that has writing pencil has more obtained very big development in recent years because of it is easy to operate.This class PDA product has bigger handwriting screen usually, and writing pencil can be write on handwriting screen or click and realize operating.Because writing pencil will contact repeatedly with handwriting screen, so number of times that handwriting screen can be write or title handwriting screen life-span will be the leading indicators of weighing these PDA properties of product.Up to now, also there is not a kind of instrument that is used for testing the handwriting screen life-span of PDA product, so that the performance of evaluation PDA product.

The utility model content

The purpose of this utility model is to provide a kind of handwriting screen life-span tester of PDA product, to realize the evaluation to these performance index of PDA product.

For achieving the above object, the handwriting screen life-span tester of PDA product of the present utility model comprises cabinet, and its leading flank and upper side are anterior to be what open wide; Admittedly put platform, be installed in the bottom of cabinet, have on it and put device admittedly, be used for putting admittedly the PDA product; Motion parts comprises drive motor and the retained part that links to each other with the output shaft of motor, and writing pencil is fixed on the retained part and with respect to described output shaft off-centre during test; Support is used for motion parts is bearing in and puts platform top admittedly; Control device comprises that based on single-chip microcomputer be the control core circuit board, and parts such as D.C. regulated power supply and stepper motor driver are used to set every control function and controlled variable, control step rotating speed of motor and number of times, and show the number of times of having tested; Panel is positioned at the rear portion of upper side, comprises the display part that is used to import the importation of motor speed and shows rotating speed and number of times.

By the handwriting screen life-span tester of PDA product of the present utility model, can test writing pencil and on handwriting screen, write number of times, thereby determine whether this PDA product is qualified, so that the performance parameter of science to be provided.

Description of drawings

The utility model will describe in conjunction with the following drawings.

Fig. 1 is a skeleton view of the present utility model;

Fig. 2 is fixed on the synoptic diagram of putting admittedly on the platform for the PDA product;

Fig. 3 is panel figure of the present utility model;

Fig. 4 is a circuit structure diagram of the present utility model.

Fig. 5 is circuit theory diagrams of the present utility model.

Embodiment

As shown in Figure 1, the cabinet 1 of the handwriting screen life-span tester of PDA product of the present utility model is a general square shape, its leading flank and upper side anterior for open wide so that operation also can be stamped dismountable transparent casing.Admittedly put the bottom that platform 2 is installed in cabinet 1, have on it and put device admittedly, be used for putting admittedly the PDA product.Drive motor 4 and the retained part that links to each other with the output shaft of motor 3 constitute motion parts, and writing pencil 10 is fixed on the retained part 3 and with respect to the output shaft off-centre of motor during test.Motion parts is supported on the support 9, the writing pencil of clamping is positioned at puts platform 2 tops admittedly.Panel 6 is positioned at the rear portion of upper side, comprises being used to import the importation 5 of motor speed and the display part 8 of rotating speed and number of times.Be used for being positioned at the below of panel 6, with panel and baffle plate control device being covered in usually for consideration attractive in appearance according to the control device (not shown) of input value control motor speed and number of times.

In when test, motor 4 drives writing pencils 10 rotations and at the handwriting screen upper drawing circle, this diameter of a circle is the eccentricity value between writing pencil and the motor output shaft.The operator can regulate eccentricity value according to the size of the handwriting screen of the PDA product of being tested.Can have chute on the support 9, the motion parts that supports with toilet can slide relatively to change the position of handwritten stroke circle.

Can show current rotating speed of motor on the panel of this tester, this value is imported by the importation by the operator.In addition, also can demonstrate the number of times that adds up, with as the foundation of judging that this product is whether qualified.All right numerical value reset button 7 after a product test is intact, is pressed reset button, so that the tested product of the next one is counted again on panel.

Jacking gear can be installed putting admittedly under the platform, worm-and-wheel gear for example can drive and puts platform admittedly and move up and down, with the distance between the handwriting screen of change writing pencil and product by rotating lifting knob button 11.Certainly, this jacking gear also can be combined on the support 9, realizes similar motion.In addition, jacking gear can also have the device of relative distance between indication writing pencil and the handwriting screen.

In when test, the PDA product is held device and is fixed on admittedly and puts on the platform.Have mounting groove on the platform admittedly put, the clamper that is used for fixing the PDA product is slidably located in the groove, thereby can regulate clip position according to the physical size of product.

As shown in the figure, clamper comprises nut, the compressing tablet that can slide, the bolt that passes compressing tablet and cooperate with nut in mounting groove, and during test, compressing tablet contacts with the PDA product and is fixed.

Although described the utility model with reference to the accompanying drawings, scope of the present utility model is not limited to specific embodiment, and those of ordinary skill in the art can carry out various distortion and equivalent transformation to the utility model in spirit and scope of the present utility model.

Fig. 3 is the guidance panel figure of this tester.Two switches are arranged on the panel, and one is power switch, and another is system's reset switch.Also have one 4 * 4 film key on the panel, the interface as the parameter setting and the function setting input of tester has 0-9 numerical key on this film key, starts in addition, stops, function keys such as time-out, storage, speed setting, number of times setting.The start key effect is to make tester begin to test; The stop key effect is to stop test; The Pause key effect is the Break-Up System test; The storage key effect is that current testing time and parameter are preserved; The effect of speed setting key is that the tester test frequency is set; The effect of number of times setting key is to preset testing time.Also have 3 groups of light-emitting diode displays on the panel, show respectively and preset testing time, preset test speed, actual testing time.

Fig. 4 is the automatically controlled part overall construction drawing of this tester.This electric-control system uses single-chip microcomputer 89C52 as core processor, make the interface circuit of light-emitting diode display and Keyboard Control with 2 parallel interface chips 8255, display driver uses ULN2803, systematic parameter storage EEPROM uses X5045, reset key uses the INT0 of single-chip microcomputer, simultaneously, Stepping Motor Control is used the P1.4-P1.5 of single-chip microcomputer, and single-chip microcomputer and stepper motor driver interface adopt 7407 chip for driving.Stepper motor adopts homemade two-phase hybrid stepping motor.

Fig. 5 is the detailed circuit schematic diagram of the automatically controlled part of this tester.As shown in the figure, both as the carrier of data storage, again as the single-chip microcomputer reset source, also as the watchdog microcontroller circuit, the signal wire of X5045 linked to each other with the P1.0-P1.3 of single-chip microcomputer serial EEPROM chip X5045.The P1.4-P1.6 of single-chip microcomputer drives the buffering back through 7407 and links to each other with stepper motor driver.Keyboard signal is controlled by 8255 (1) C mouth, the C mouth high 4 and low 4 respectively as input port and delivery outlet.The LED demonstration has 19 charactrons, is divided into two groups and controls respectively, and its video data is shown and adopted dynamic display mode that its route selection is produced by 8255 (2) A mouth and B mouth by 8255 (1) A mouths and the control of B mouth.Display driver adopts the ULN2803 chip for driving.In addition, also expand a RS232 mouth and PC communication, communication chip adopts MAX232.

Claims (10)

1. the handwriting screen life-span tester of a PDA product is characterized in that, this tester comprises cabinet, and its leading flank and upper side are anterior to be what open wide; Admittedly put platform, be installed in the bottom of cabinet, have on it and put device admittedly, be used for putting admittedly the PDA product; Motion parts comprises drive motor and the retained part that links to each other with the output shaft of motor, and writing pencil is fixed on the retained part and with respect to described output shaft off-centre during test; Support is used for motion parts is bearing in and puts platform top admittedly; Control device comprises that based on single-chip microcomputer be the control core circuit board, and D.C. regulated power supply and stepper motor driver part are used to set every control function and controlled variable, control step rotating speed of motor and number of times, and show the number of times of having tested; Panel is positioned at the rear portion of upper side, comprises the display part that is used to import the importation of motor speed and shows rotating speed and number of times.

2. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that described support has chute, and motion parts can slide in this chute, and the PDA product changes the position on the platform with respect to putting admittedly to change.

3. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that, the described platform of putting admittedly has jacking gear, makes the product of putting admittedly thereon to move up and down with respect to the writing pencil of clamping.

4. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that described support has jacking gear, makes the writing pencil of clamping to move up and down with respect to the product of putting admittedly on the platform.

5. as the handwriting screen life-span tester of each described PDA product among the claim 1-4, it is characterized in that described writing pencil retained part has micro-adjusting mechanism, the adjusting writing pencil acts on the pressure on the handwriting screen after writing pencil contact handwriting screen.

6. as the handwriting screen life-span tester of claim 3 or 4 described PDA products, it is characterized in that, at the device that has relative distance between indication writing pencil and the handwriting screen on the described jacking gear.

7. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that, has reset button on the described display panel, to recomputate number of times.

8. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that, described putting admittedly has mounting groove on the platform, and the clamper that is used for fixing the PDA product is slidably located in the groove, to push down described PDA product.

9. the handwriting screen life-span tester of PDA product as claimed in claim 8, it is characterized in that, described clamper is included in two pairs of bolts sliding in the mounting groove, the two pairs of compressing tablets, is positioned on two pairs of compressing tablets and two pairs of nuts that cooperate with two pairs of bolts, during test, compressing tablet contacts with the PDA product and is fixed.

10. the handwriting screen life-span tester of PDA product as claimed in claim 1 is characterized in that, described unlimited cabinet leading flank and upper side front portion are covered by transparent casing.

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