CN2175408Y - Digital showed steel band tape for measuring length - Google Patents

Abstract

The utility model discloses a digital showed steel band tape for measuring length. The steel band tape is a tape having no graduation, and a counting device is composed of a counter wheel, an optical rotary encoder and a digital showed device. The end of the steel band tape is provided with a movable measuring head, and a fixing measuring head is arranged on a tape box. The digital showed steel band tape for measuring length is provided with a steel band tape cleaning device. The precision can be enhanced, various dimensions of the objects can be measured, and the manufacturing cost is lower than the large size caliper rule. The measuring range is enlarged, and the utility model is not easy to damage.

Description

The utility model belongs to survey instrument, relates to a kind of chi of measuring length, does not particularly have the scale overlength number of degrees and shows steel tape.

The chi of measuring length commonly used at present has steel box chi, slide calliper rule etc.For improving measuring accuracy, photoelectricity box chi has appearred on the market in recent years, on steel ruler, engrave the scale of convex-concave, this chi is made difficulty and is caused the expense costliness, and owing to wear and tear in using, ruler damages very fast in addition.Kind of calliper length range commonly used is limited, and the too low physical dimension that can only Measuring Object of steel tape precision.

The purpose of this utility model is to provide a kind of no scale overlength number of degrees to show steel tape, need not at the steel ruler high scale, and is not fragile, the physical dimension of energy measurement object not only, but also Measuring Object inside dimensions and special-shaped physical dimension, and can improve precision.

The utility model is achieved through the following technical solutions: a kind of no scale overlength number of degrees show steel tape, comprise chi case, steel tape and counting assembly.Steel tape is no rule.Counting assembly is made up of counter wheel, optical rotary encoder and digital display device.Moving gauge head is equipped with in the steel tape end, and the location survey head is housed on the chi case, and the steel ruler cleaning device is housed.

The utility model is used for measuring length, and counting is to drive counter wheel by steel ruler further to drive optical rotary encoder, sends pulse and shows with digital display device, therefore need not graduate on steel ruler, and the steel ruler cost reduces greatly.Gauge head can be stuck in any position of object, can measure the profile and the inside dimensions that comprise object, also can survey special-shaped size.The dirt that cleaning device is removed in the steel ruler motion process on the steel ruler makes it avoid wearing and tearing, has prolonged the serviceable life of steel ruler.

The utility model is described in further detail below in conjunction with embodiment of the present utility model.

Description of drawings:

Fig. 1-the utility model front elevation,

Fig. 2-the utility model vertical view,

Fig. 3-the utility model longitudinal section,

Fig. 4-the utility model transverse sectional view.

(1) location footage handle, (2) chi case, (3) steel tape, (4) steel ruler box, (5) bearing, (6) bearing, (7) counter wheel, (8) spring coupling, (9) optical rotary encoder, (10) contact roller support, (11) guard shield, (12) location survey head, (21) moving gauge head, (13) optical rotary encoder support, (14) contact roller, (15) spring, (16) steel ruler washer, (17) head-measuring rack, (18) contact roller support shaft, (19) digital display device, (20) button.

Fig. 1-4 has showed an embodiment of the present utility model, 2 chi box axles (22) that are parallel to each other and counting wheel shaft (23) are housed in the chi case (2), and the breach that no scale steel ruler (3) passes chi case (2) side around last its outer end of chi box axle (22) passes by head-measuring rack (17) and moving gauge head (21) and joins.Steel ruler (3) is pressed on counter wheel (7) surface by contact roller (14) with it in chi case (2).Contact roller (7) is hinged on the movable end of crank-like contact roller support (10), is connected with spring (15) and closely contacts with counter wheel (7) to guarantee contact roller (14) between contact roller support (10) and chi case (2) inwall.Counting wheel shaft (23) is connected with optical rotary encoder (9) by spring coupling (8).The output terminal of optical rotary encoder (9) is connected with micro-processor controlled digital display device (19).Be fixed with location survey head (12) on the head-measuring rack (17).On chi box axle (22), be equipped with and arbitrarily locate and to locate footage handle (1).The steel ruler cleaning device is made with the material of adsorbable cleaning fluid for being contained in the steel ruler washer (16) on chi case (2) side indentation, there clamping steel ruler (3) two sides, can disassembling, assembling and replacing, and material therefor is a polyfoam in the present embodiment.Affect moving gauge head (21) during use, make location survey head (12) and testee two ends, moving gauge head (21) office, the length that steel ruler (3) is pulled out can be gone up at digital display device (19) through MICROCOMPUTER PROCESSING by the pulse that send scrambler (9) and show.Because of the effect of contact roller (14), counter wheel (7) and steel ruler (3) are fricton-tight each other, and the length that steel ruler (3) is pulled out can accurately be reflected by scrambler (9).Precision can reach 0.05mm.Because steel ruler does not have scale, can make 5m, 10m so that longer length.

Embodiment 2: remove handle (1) in embodiment 1, load onto motor on chi box axle (22), can realize electronic footage.

Embodiment 3:, location survey head (21) moving, (12) with removing among the embodiment 1, a dop of common slide calliper rule is fixed on the chi case (2), and another dop connects with steel ruler (3) as moving gauge head can constitute another embodiment of the present utility model.

Claims (4)

1, a kind of no scale overlength number of degrees show steel tape, comprise chi case, steel tape and counting assembly, it is characterized in that

1) steel tape is no rule,

2) counting assembly is made up of counter wheel, optical rotary encoder and digital display device,

3) moving gauge head is equipped with in the steel tape end, and the location survey head is housed on the chi case,

4) has the steel ruler cleaning device.

2, the no scale overlength number of degrees according to claim 1 show steel tape, it is characterized in that steel ruler (3) is pressed on counter wheel (7) surface by contact roller (14) with it in chi case (2), counting wheel shaft (23) is connected with optical rotary encoder (9) by spring coupling (8), and the output terminal of optical rotary encoder (9) is connected with micro-processor controlled digital display device (19).

3, the no scale overlength number of degrees according to claim 1 show steel tape, it is characterized in that the steel ruler cleaning device is for being contained in the steel ruler washer (16) on chi case (2) side indentation, there clamping steel ruler (3) two sides, material with adsorbable cleaning fluid is made, can disassembling, assembling and replacing.

4, the no scale overlength number of degrees according to claim 1 show steel tape, it is characterized in that removing moving gauge head (21), and location survey head (12) is fixed on a dop of common slide calliper rule on the chi case (2), and another dop connects with steel ruler (3).