CN200982847Y

CN200982847Y - Digital display photoelectric band tape

Info

Publication number: CN200982847Y
Application number: CN 200620016052
Authority: CN
Inventors: 薛志强
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-28
Filing date: 2006-11-28
Publication date: 2007-11-28
Anticipated expiration: 2016-11-28

Abstract

The utility model discloses a digital photoelectric line tape, which comprises a shell and the shell is installed with a tape box, a spring motor, a tape, a function key, a brake block, a piece of hot-pressing zebra paper, a brake key, a light-emitting component and a photosensitive element. A display screen, the function key are arranged outside of the shell, the center of the spring motor is fixed in the center of the shell, and the brake block and the brake key are fixed on the shell. In addition, the numbers at every millimeter scale mark and every five millimeter scale mark of the tape are read by the light-emitting component and the photosensitive element on the circuit via pulling out the tape and a single chip conducts an error correction before the results are finally shown digitally on the display screen. The utility model has the advantages of direct display of digital result, small volume, portability, visual and precise reading, and small errors.

Description

Digital display photoelectricity tape measure

Technical field

The utility model relates to a kind of length-measuring appliance, relates to a kind of photoelectricity tape measure that numeral shows that has specifically.

Background technology

Present mechanical band tape graduation resolution is millimeter, but the arithemetic unit of printing normally centimetre, and the reading of millimeter unit can only rely on naked-eye observation to determine, the reading inconvenience is made mistakes easily.

China Patent No. ZL 94110610 discloses a kind of " multifunctional digital demonstration tape measure ", it is by the mechanical rotation control module, sensing unit, the special IC module, circuit of display driving, compositions such as display, its mechanical rotation control module adopts chi band to utilize friction force to drive friction pulley to rotate or adopt perforation on the chi band and barbed gear to match and transmission, thereby the length that the chi band is pulled out changes electric signal into by sensing unit, and after treatment, demonstrate measurement length with numeral, the defective of prior art is, the measurement result and the out of true of above-mentioned friction pulley examination transmission, and the mechanical drive mode of chi band makes apparatus structure complicated, volume is bigger, portably uses all inconvenient.

The utility model content

The purpose of this utility model provides a kind of novel photoelectricity tape measure with numeral demonstration, and the utility model directly shows measurement result with numeral, and volume is little, and is easy to carry, and the reading aspect is more directly perceived and accurate, and error is little.

The technical solution of the utility model is as described below: a kind of digital display photoelectricity tape measure, comprise a shell and installation chi tape drum in the enclosure, clockwork spring, the chi band, function button, brake block, single-chip microcomputer, circuit board, the hot pressing zebra paper, brake key and brake block and light-emitting component and photo-sensitive cell are formed, in addition, display screen, function key is installed on housing exterior, the central point of clockwork spring is positioned at the shell central point, make it and to rotate, the outer end of clockwork spring is positioned at chi tape drum inboard, brake block, the brake key is fixed on the shell, come together to control the motion of chi band and fix, circuit board is installed in the enclosure and is fixed on the chi tape drum between shell, single-chip microcomputer, light-emitting component and photo-sensitive cell are installed on the circuit board, the hot pressing zebra paper is installed between circuit board and the display screen, display screen is installed in the window place of shell, function button is installed in the key hole of shell and contacts with circuit board, by pulling out the chi band, read out in scale number on the chi band by light-emitting component on the circuit board and photo-sensitive cell, carry out error correction by single-chip microcomputer and finally be presented on the display screen with numeral.

Compared with prior art, the beneficial effects of the utility model are, the utility model directly shows measurement result with numeral, and volume is little, and is easy to carry, and the reading aspect is more directly perceived and accurate, and error is little.

Description of drawings

Below in conjunction with the drawings and the specific embodiments the utility model is described in detail.

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

Fig. 2 is a rear view of the present utility model;

Fig. 3 is the synoptic diagram of chi band and light-emitting component and photo-sensitive cell;

Fig. 4 is the sectional view of the left view of Fig. 1.

Chi tape drum in the drawings, 1; 2, clockwork spring; 3, chi band; 4, shell; 5, circuit board; 6, display screen; 7, function button; 8, single-chip microcomputer; 9, light-emitting component; 10, photo-sensitive cell; 11, hot pressing zebra paper; 12, brake block; 13, brake key.

Embodiment

Digital display photoelectricity tape measure structure of the present utility model and principle of work are as follows: as Fig. 1,2, shown in 4, the central point of clockwork spring 2 is positioned at shell 4 central points, make it and to rotate, the outer end of clockwork spring 2 is positioned at chi tape drum 1 inboard, brake block 12, brake key 13 is fixed on the shell 4, come together to control the motion of chi band 3 and fix, when pulling out chi band 3, clockwork spring 2 is tightened up thereupon, presses brake key 13 this moment, brake block 12 is with fixed ruler band 3, lift brake key 13, brake block 12 lifts thereupon, and clockwork spring resets, drive chi band 3 and regain in the shell 4, circuit board 5 is installed in the shell 4 and is fixed on chi tape drum 1 between shell 4.

As Fig. 2,3,4, single-chip microcomputer 8, light-emitting component 9 and photo-sensitive cell 10 are installed on the circuit board 5, hot pressing zebra paper 11 is installed between circuit board 5 and the display screen 6, display screen 6 is installed in the window place of shell 4, when pulling out or regaining chi band 3, light-emitting component 9 and photo-sensitive cell 10 will be read the electric signal of each scale, through amplifying, obtain square wave after the shaping, the time interval of the high level of square wave is corresponding to the time of chi band scale reflection ray to photo-sensitive cell, square-wave signal is transferred to single-chip microcomputer 8, by obtaining measuring length numerical value after single-chip microcomputer 8 processing, be hot-pressed onto on the display screen 6 through hot pressing zebra paper 11, length numerical value just shows with digital form on display screen 6, thereby reaches the numeration purpose.

As Fig. 3, there is the scale strip of 3 millimeters long at every millimeter place on the chi band 3, and there is the scale strip of 5 millimeters long at per 5 millimeters scale places, and there is the scale strip of 9 millimeters long at per 1 centimeter scale place.Pull out or the process of the chi band 3 of withdrawing in, if the movement velocity of chi band is roughly even, the waveform that one group of photo-sensitive cell is read is the waveform of corresponding every millimeter scale, the waveform that one group of photo-sensitive cell is read is the waveform of corresponding per 5 millimeters scales.When one group of photo-sensitive cell was read 5 waveforms, another photo-sensitive cell will be read a waveform, and when two square waves occurred simultaneously, MCU can adjust and the error of calculation, the length of estimating after proofreading and correct will showed accurately on the display screen 6.This function has important effect, pull out on the one hand or the speed of the chi band 3 of withdrawing is easy to generate error in reading when inhomogeneous, tape measure is long-term on the other hand may cause that to change the belt surface scale unintelligible after using, or the surface has foul to cover, when occurring, per 5 millimeters scale waveforms will revise error in reading, so all can proofread and correct at per 5 millimeters places, thereby can demonstrate data accurately, reach the correction purpose.

Function button 7 is installed in the key hole of shell 4 and with circuit board 5 and contacts, and presses function button 7, can change the program run mode in the single-chip microcomputer 8, reaches functions such as data maintenances, metric and English conversion and changes purpose.

Claims

1, a kind of digital display photoelectricity tape measure, comprise a shell (4), it is characterized in that, the central point of clockwork spring (2) is positioned at shell (4) central point, the outer end of clockwork spring (2) is positioned at chi tape drum (1) inboard, brake block (12), brake key (13) is fixed on the shell (4), come together to control the motion of chi band (3) and fix, circuit board (5) is installed in the shell (4) and is fixed on chi tape drum (1) between shell (4), single-chip microcomputer (8), light-emitting component (9) and photo-sensitive cell (10) are installed on the circuit board (5), hot pressing zebra paper (11) is installed between circuit board (5) and the display screen (6), and display screen (6) is installed in the window place of shell (4).

2, digital display photoelectricity tape measure according to claim 1, its feature are that also there is the scale strip of 3 millimeters long at the last every millimeter place of chi band (3), and there is the scale strip of 5 millimeters long at per 5 millimeters scale places, and there is the scale strip of 9 millimeters long at per 1 centimeter scale place.

3, digital display photoelectricity tape measure according to claim 1, its feature also be, function button (7) is installed in the key hole of shell (4) and with circuit board (5) and contacts.