CN2174684Y

CN2174684Y - Tape measure with mechanical counter

Info

Publication number: CN2174684Y
Application number: CN 93231625
Authority: CN
Inventors: 张爱勤
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-16
Filing date: 1993-08-16
Publication date: 1994-08-17
Anticipated expiration: 2003-08-16

Abstract

The utility model relates to a length measuring device with the function of displaying the measured length digital. The utility model is characterized in that the tape measure utilized to measure the length is provided with a mechanical digital display device. When the length of an object is measured, the movement of the tape measure is transmitted to the mechanical counter through a gear, the length of the object can be displayed clearly and visually through the counter, and the functions of adding numbers of measured length and recording the measured length of the current time can be realized. The utility model is composed of a measuring tape, a spring, a driving gear, a mechanical counter, a plastic outer shell and a connecting piece. The utility model has the advantages of simple structure, low cost, and convenient operation and use.

Description

Tape measure with mechanical counter

The present invention relates to a kind of measurement mechanism, be suitable for the tape measure class survey instrument that people use always.At present, people are used tape measure usually, and its pinpoint accuracy is a millimeter unit, and still, the long measure that can indicate with arabic numeral on tape measure is centimetre, and a millimeter unit can only observe by eyes again and determining.This mode that relies on eyes observation to determine length fully has the shortcoming of three aspects: 1. out of true, the fuzzy slightly number of just misunderstanding millimeter unit of eyes; 2. time-consuming, can not read the number of millimeter unit at once to Measuring Object; 3. can not add up automatically and measure for several times the data of length; 4. can not keep when time data of measurement.

The purpose of the present utility model aims to provide a kind of tape measure with mechanical digital counting and Presentation Function, by tape band moving gear with holes, by the digital wheel of gear rotary machine counter.Thereby when reaching the tape measure object length, the above numeral of millimeter unit can both show in digitizing, can see at once and read the numeral that object is accurate to mm length clearly, and when the long and tape measure of object can not one-shot measurement be finished, can add up automatically and measure for several times the data of length, can also keep when time length measured data.It has solved existing with ordinary tape measure some shortcomings in use.

The purpose of this device is to realize like this, dip stick is stamped identical shaped hole by certain same distance, the shape in the hole on the bottom of the thorn shape tooth on the driving wheel and the dip stick is identical and identical, and thorn shape tooth can enter and break away from the hole on the dip stick freely, and driving wheel and tape measure fit together under the setting off of support.Driving wheel has driven engaged wheel by the friction force of rubber medium, and by the transmission of gear on the engaged wheel and following several grades of gears, the type drum on the counter rotates with turning to according to the revolution of driving wheel, shows the numeral of different length.

Be described further below in conjunction with the structure and the operating principle of accompanying drawing this device:

Fig. 1 is the front view of tape measure.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 2.

Fig. 4 is the part of tape measure with holes.

Among Fig. 2, dip stick spring gim peg 31, dip stick spring 12 and dip stick 10 junction buttons 6, brake lever fixed head 26, the dip stick of this device has been stamped regular hole 34 by certain distance, as shown in Figure 4.With reference to Fig. 2, profile of tooth on driving wheel 15 outer rims and the hole on the dip stick 10 match, and when pulling dip stick 10, the tooth 35 on gear 15 outer rims can successfully enter and break away from the hole 34 on the dip stick 10.With reference to Fig. 3 gear 15 be with centre fixed leg 36 with holes serve as the axle move in a circle.Knob 18 just in time is embedded in to-and-fro movement vertically in the circular hole in the middle of the fixed leg 36.The interior circle of driving wheel 15 is enclosed within the fore-end of gear 5, be anti-sliding stop, the fore-end of gear 5 is rubber layers with driving wheel 15 contacted 32 of interior circle promptly, gear 5 is enclosed within on the fixed leg 27, the bottom of fixed leg 27 is around spring 28 is arranged, supporting gear 5 tightly fits at surface of contact 32 places with driving wheel 15 and does not produce slip, the gear parts engagement of the gear parts of gear 5 rear ends and gear 4 rear ends, the axle center of gear 4 is identical with the axle center of fixed leg 30, the front end gear of gear 4 is meshed with the gear 9 of mechanical counter 3, the digital wheel that the rotation of gear 9 drives counter rotates, transmission gear between gear 5 and the gear 9, as parts such as gears 4, played the effect of regulating rotating ratio.Support 16 is setting off dip stick 10 and is matching together with gear 15, and the dovetail groove in the middle of the support 16 provides regular movable rail space for the tooth 35 on gear 15 outer rims.

With reference to Fig. 2, under brake lever 2 normalities under the pressure of spring 25, tape measure 10 is withstood on as shown in the figure A point, the rotation axis of knob 1 is 19, knob 1 packs on the bolt hole 21 by circle gib-headed bolt 20 with brake lever 2 and links together, bolt hole 21 is as shown in Figure 2 oblong, can guarantee the rectilinear motion up and down of brake lever 2 like this.When pressing knob 1, under the effect of bolt 20, just lifted brake lever 2, dip stick 10 just can pull out arbitrarily and regain this moment, and brake lever 2 moves up and down in the centre of brake activity frid 22.

The main functions of use of this device is achieved in that pressing counter return-to-zero knob 29 makes counter multiple " 0 ".At first press knob 1, upgrade brake lever 2, make the top, lower end of brake lever 2 break away from dip stick 10 above, pulling dip stick 10 has driven driving wheel 15, rotates together in company with driving wheel 15 at the supporting role lower gear 5 of spring 28, what rotate by following gear, be transferred to the gear on the counter 3, as the gear on Fig. 39, the length that the numeral of counter is stretched out according to dip stick demonstrates identical with it numeral always.When dip stick self proper length is shorter than the length of object being measured and measured object one-shot measurement can not be finished, press knob 18, gear 5 is broken away from and the contacting of driving wheel 15, then, regain tape measure, though the action of the withdrawal of tape measure at this moment drives driving wheel 15 to counter-rotation, but can not drive following what gear rotates, so just make the digital constant of counter 3, behind whole withdrawal dip sticks 10, Panasonic's knob 18, gear 5 recovers and the contacting of driving wheel 15, and when dip stick 10 again during the not measured intact part of Measuring Object, running part repeats previous transmission process again, but digital counter is to count original the measurement on the digital basis, for several times repeat above-mentioned course of action and just finished the measurement than long materials, the last length that shows of counter promptly is the length data of whole object, like this when measuring than long materials, because dip stick can not finish by one-shot measurement, through measuring automatic accumulation length data have just been realized in the back on counter function for several times.If need to keep the numeral of measuring when inferior, after having surveyed object length, press knob 18, shrink back dip stick 10, no longer press multiple " 0 " knob 29 on the counter, will keep on the counter always, realized working as the inferior record of measuring length when time length measured.The counter viewing window 11 shown numerals of this device are the distance between the washer 24 of outlet 38 belows of dip stick 10 on the preceding dististyle 23 of dip stick 10 and the shell.

It is four figures that the mechanical digital that this device designs is as required counted device, so just can be shown to the numeral of mm length unit, shell of this device and inner driving member can adopt plastics or metal material processing to be shaped, dip stick and tape measure spring 12 are metal material, each several part adopt inlay, suit or bolt combine.The tape measure product that adopts this device to realize is convenient to processing, and is easy to use.

Claims

1, one by plastics or metal shell 7, dip stick 10 with holes, and the measurement mechanism that running part that gear 4,5,9,15 is formed and mechanical digital counter 3 are formed is characterized in that the holes 34 of stamping identical shape by certain same distance above the dip stick 10.

2, according to right 1 described device, the shape of the root of the tooth 35 on gear 15 outer rims that it is characterized in that contacting with dip stick 10, with the shape in hole on the dip stick 10 is identical and identical, and when pulling dip stick 10, tooth 35 can successfully enter and break away from the hole 34 on the dip stick 10.

3, according to right 1 described device, the interior circle of gear 15 is truncated cone-shaped as shown in Figure 3, be enclosed within the fore-end of gear 5, its surface of contact is the non slip surface of rubber or coating, gear 5 and gear 15 are enclosed within respectively on fixed leg 27 and the fixed leg 36, spring 28 Support Gears 5 closely contact with gear 15, so that do not produce relative displacement in rotation.

4, according to right 1 and right 3 described devices, it is characterized in that in the circular hole in the middle of fixed leg 36 knob 18 being set, press knob 18, gear 5 and gear 15 are disengaged.

5,, it is characterized in that the digital indicator on this device is the mechanical digital counter according to right 1 described device.