CN2672613Y

CN2672613Y - Rongshan typd digital band tape

Info

Publication number: CN2672613Y
Application number: CN 200320102400
Authority: CN
Inventors: 王荣华
Original assignee: Measuring & Cutting Tools Plant Qinghai
Current assignee: Measuring & Cutting Tools Plant Qinghai
Priority date: 2003-10-23
Filing date: 2003-10-23
Publication date: 2005-01-19
Anticipated expiration: 2013-10-23

Abstract

The utility model relates to a Rongshan type digital band tape, comprising an outer shell (1), a going barrel (2), a mainspring (8) and a ruler tape (7). The Rongshan type digital band tape is characterized in that a rotary device is arranged in the outer shell (1), the rotary device is provided with a the movable grid (4) of a Rongshan sensor, and the fixed position corresponding to the movable grid (4) is provided with the fixed grid (5) of the Rongshan sensor; the output signals of the Rongshan sensor are orderly input to an exclusive use analog-digital conversion chip, a singlechip (9) and a display (3) arranged at the outer shell (1). The band tape has convenient and accurate scale reading and time saving.

Description

The capacitive grid type digital display tape measure

Technical field the utility model relates to a kind of tape measure of measuring length, the tape measure that particularly a kind of numeral shows.

The present people of background technology are widely used a kind of boxlike tape measure, and this tape measure is equipped with a going barrel in the enclosure, and clockwork spring is housed in the going barrel, is wound with the chi band on the going barrel, and the chi band is marked with scale, and its resolution of indicating is millimeter.During measurement the chi band is pulled out, measure the automatic rollback of back chi band, this chi band can carry out the measurement of general object length.But because the restriction of size, the long measure of the arabic numeral that reality can be indicated but is centimetre, and the reading of millimeter unit can only rely on naked eyes to determine.Therefore its shortcoming be easily make mistakes, inaccurate and time-consuming.

The content the purpose of this utility model of invention be to provide that a kind of numeral shows and convenient reading, accurately, the timesaving digital band tape.

The technical solution of the utility model is: this tape measure comprises shell 1, going barrel 2, clockwork spring 8 and chi band 7, be characterized in a wheelwork is housed in shell 1, on wheelwork, install capacitor grid transducer moving grid 4, with moving grid 4 position that is relatively fixed the fixed grid 5 of capacitor grid transducer is being installed; During use, chi band 7 drives wheelwork and moving grid 4 rotations, because relatively rotating between moving grid 4 and the fixed grid 5, the variation of its electric capacity and electric signal is changed, this variation is input to special-purpose modulus conversion chip becomes digital signal, after single-chip microcomputer 9 is handled, output to display 3 again, demonstrate the length of pulling out of chi band 7.Display 3 is installed on the shell 1.

Another characteristics of the present utility model are that described wheelwork is a going barrel 2, at the end face of going barrel 2 moving grid 4 are installed, and on the shell 1 relative with moving grid 4 fixed grid 5 are installed; Between moving grid 4 and fixed grid 5, also be equipped with and make the moving grid 4 and the gap of fixed grid 5 keep constant pad 10; One spring leaf 11 also is housed between the end face of moving grid 4 and going barrel 2.

Another characteristics of the present utility model are that described wheelwork is power wheel 15 and the pinch roller of installing in the shell 1 16; Moving grid 4 is installed on the end face of power wheel 15, and fixed grid 5 is installed in the shell 1 relative with moving grid 4, and a pad 10 also is housed between moving grid 4 and fixed grid 5; Several equidistant small column tooth 15a that chamfering is arranged are arranged on the wheel face of power wheel 1, the friction sleeve of being made by resilient material 17 also is housed on the wheel face of power wheel 15; On described chi band 7, have equidistant small sircle hole, be meshed with small column tooth 15a on the power wheel 15; Chi band 7 passes from the contact site of power wheel 15 with pinch roller 16.

Another characteristics of the present utility model be in described shell 1, there is a zero-bit switch in the exit of chi band 7, and a zero-bit contact 12 promptly is housed on chi band 7, adorns a pole 13 and pole piece 14 in shell 1.

Advantage of the present utility model and effect are: this tape reading is convenient, accurately, save time.

Description of drawings Fig. 1 is the utility model structural representation

Fig. 2 is zero be switch and installation site synoptic diagram thereof

Fig. 3 is embodiment 2 structural representations

Fig. 4 is the A-A cut-open view of Fig. 3

Embodiment embodiment 1: as Fig. 1, Fig. 2, during measurement chi band 7 is pulled out from shell 1, chi band 7 drives going barrel 2 rotations, the moving grid 4 that is fixed on this moment on going barrel 2 end faces rotates thereupon together, and being fixed on electric capacity between the fixed grid 5 in the shell 1 changes and produces electric signal, this signal inputs to single-chip microcomputer 9 after the modulus conversion chip of special use changes digital signal into, input to display 3 again after single-chip microcomputer 9 converts the demonstration sign indicating number to, demonstrates the length of pulling out of chi band 7.Measurement finishes, rely on the spring force of clockwork spring 8 that chi band 7 is regained in the going barrel 2, when getting back to zero-bit, the zero-bit contact 12 on the chi band 7 makes pole 13 and pole piece 14 conductings, trigger zero signal display is made zero, thereby the zero-bit that guarantees display 3 is consistent with the zero-bit of chi band 7.6 for installing the central shaft of going barrel 2 among Fig. 1.

Embodiment 2: be power wheel 15 and the pinch roller of installing in the shell 1 16 as Fig. 3, Fig. 4, wheelwork; Moving grid 4 is installed on the end face of power wheel 15, and fixed grid 5 is installed in the shell 1 relative with moving grid 4, and a pad 10 also is housed between moving grid 4 and fixed grid 5; Several equidistant small column tooth 15a that chamfering is arranged are arranged on the wheel face of power wheel 15, the friction sleeve of being made by resilient material 17 also is housed on the wheel face of power wheel 15; On described chi band 7, have equidistant small sircle hole, be meshed with small column tooth 15a on the power wheel 15; Chi band 7 passes from the contact site of power wheel 15 with pinch roller 16.During measurement perforate chi band 7 is pulled out shell 1, drive rotor wheel 15 rotations, small sircle hole on the pinch roller 16 assurance chi bands 7 and the small column tooth 15a positive engagement on the power wheel 15 by friction sleeve on the power wheel 15 17 and small column tooth 15a; The moving grid 4 that is fixed on this moment on power wheel 15 end faces rotates thereupon together, and and fixed grid 5 between the variation of electric capacity takes place and produce electric signal, this signal is input to single-chip microcomputer 9 after special-purpose modulus conversion chip is converted to digital signal, again through single-chip microcomputer 9 convert to show sign indicating number after input display 3, demonstrate the length of pulling out of chi band 7.Measurement finishes, and relies on the spring force of clockwork spring 8 that chi band 7 is regained in the going barrel 2.

Claims

1, capacitive grid type digital display tape measure, comprise shell (1), going barrel (2), clockwork spring (8) and chi band (7), it is characterized in that in shell (1), a wheelwork being housed, on wheelwork, install capacitor grid transducer moving grid (4), with moving grid (4) position that is relatively fixed the fixed grid (5) of capacitor grid transducer is being installed; The output signal of capacitor grid transducer is input to special-purpose modulus conversion chip, single-chip microcomputer (9) successively and is installed on display (3) on the shell (1).

2, a kind of digital band tape as claimed in claim 1 is characterized in that described wheelwork is going barrel (2), at the end face of going barrel (2) moving grid (4) is installed, and fixed grid (5) is installed in the shell (1) relative with moving grid (4); Between moving grid (4) and fixed grid (5), also be equipped with and make the moving grid (4) and the gap of fixed grid (5) keep constant pad (10); Between the end face of moving grid (4) and going barrel (2), a spring leaf (11) is housed also.

3, a kind of digital band tape as claimed in claim 1 is characterized in that described wheelwork is power wheel (15) and the pinch roller of installing in the shell (1) (16); Moving grid (4) is installed on the end face of power wheel (15), and fixed grid (5) is installed in the shell (1) relative with moving grid (4), between moving grid (4) and fixed grid (5) pad (10) is housed also; Several equidistant small column teeth (15a) that chamfering is arranged are arranged on the wheel face of power wheel (15), the friction sleeve of being made by resilient material (17) also is housed on the wheel face of power wheel (15); On described chi band (7), have equidistant small sircle hole, be meshed with small column tooth (15a) on the power wheel (15); Chi band (7) passes from the contact site of power wheel (15) with pinch roller (16).

4, a kind of digital band tape as claimed in claim 2, it is characterized in that in described shell (1), there is a zero-bit switch in the exit of chi band (7), one zero-bit contact (12) promptly is housed on chi band (7), in shell (1), adorns a pole (13) and pole piece (14).