CN101676678A

CN101676678A - Electric measuring tape

Info

Publication number: CN101676678A
Application number: CN200810121212A
Authority: CN
Inventors: 黄忠华
Original assignee: 吴其联
Current assignee: Ningbo Jufeng Tool Industrial Co.,Ltd.
Priority date: 2008-09-17
Filing date: 2008-09-17
Publication date: 2010-03-24
Anticipated expiration: 2028-09-17
Also published as: CN101676678B

Abstract

The invention relates to an electric measuring tape which comprises a measuring tape shell, a measuring tape core disc and a motor, wherein the measuring tape shell is provided with a containing space; the measuring tape core disc is rotatablely arranged inside the measuring tape shell and wound with a measuring tape belt; and the motor is also positioned inside the measuring tape shell and is linked with the measuring tape core disc by a transmission mechanism so as to stretch and contract the measuring tape from the measuring tape shell. The electric measuring tape is characterized in that the peripheral surface of the measuring tape core disc is provided with an automatic clamping mechanism which forces the measuring tape belt to be compactly wound on the measuring tape core disc all the time. Compared with the prior art, the electric measuring tape has the advantages that as the automatic clamping mechanism which forces the measuring tape belt to be compactly wound on the measuringtape core disc all the time is added, the phenomenon of expanded belt can be avoided, the probability of damaging the measuring tape belt can be reduced, and the measuring tape is ensured to be operated normally.

Description

Electric band tape

Technical field

The present invention relates to a kind of electric band tape, relate in particular to the electric band tape that the chi band of reeling on a kind of chi core is in the state of holding tightly all the time.

Background technology

Existingly all need during use directly the chi band to be pulled out from the chi shell, and rely on the return effect of wind spring or turning handle, use and be not very convenient the rolling of chi band with hand generally at the tape measure of usefulness.

For this reason, a lot of electric band tapes appear, the electric band tape of this class can realize the chi band pull out with rolling by switch by control turning to of motor finish.Electric band tape generally comprises chi shell, chi core dish and motor etc., the chi shell has accommodation space, chi core dish is located in the chi shell and is wound with the chi band, and motor also is located in the chi shell and can be linked to realize stretching out and the aforementioned chi shell of indentation of tape measure by a gear train and chi core dish.Referring to the patent No. is Chinese utility model patent " the electric band tape " (Granted publication number: CN2859447Y) of ZL200520116342.6; It referring to the patent No. again Chinese utility model patent " the electric band tape " (Granted publication number: CN2924477Y) of ZL200620051369.6; Can also be referring to the Chinese utility model patent " electric band tape " of ZL200720183878.9 (Granted publication number: CN201083476Y).

Though the appearance of electric band tape has made things convenient for use, do not have to solve but there are the following problems: the chi band under the motor effect, finish pull out with wrapup procedure in can to cause the coiling of chi core dish be not very compact, be commonly called as " expansible band " phenomenon, it is deft inadequately smooth-going that chi is brought into out, follow-up use can be influenced like this, seriously the chi band may be damaged.

Summary of the invention

Technical matters to be solved by this invention be provide at the above-mentioned state of the art a kind of chi band pull out with wrapup procedure in hold tightly in chi core dish all the time, avoid the electric band tape of expansible band.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this electric band tape comprises

The chi shell has accommodation space;

Chi core dish is located in the aforementioned chi shell rotationally and is wound with the chi band;

Motor is located in the aforementioned chi shell, and by the interlock of a gear train and aforementioned chi core dish realizing stretching out and the aforementioned chi shell of indentation of chi band,

It is characterized in that described chi core dish outer peripheral face is provided with one and forces described chi band to be wound in the automatic hold-fast body of described chi core dish all the time compactly.

As preferentially, described automatic hold-fast body acts on described chi band along described chi core disc radial.

Automatically hold-fast body serves as preferred in one of following two kinds of modes:

First kind, described automatic hold-fast body comprises as the reed of pivoted arm and is arranged at the roller of aforementioned leaf end rotationally, aforementioned reed is arranged at described chi shell inwall rotationally, aforementioned roller under self elastic force effect of aforementioned reed with described chi core dish on the chi band offset.Further, described reed is herringbone substantially, and described roller is two, is arranged at the bifurcate end of described reed respectively, and the intersection intermediate location of described reed then is arranged at described chi shell inwall rotationally by the reed axle.

Second kind, described automatic hold-fast body comprises

Pivoted arm is arranged at described chi shell inwall rotationally;

Roller is arranged at aforementioned pivoted arm end rotationally, and offsets with chi band on the described chi core dish; And

Actuator acts on aforementioned pivoted arm all the time and forces aforementioned roller and described chi band offsets.

Further, described pivoted arm is herringbone, and described roller is two, is arranged at the bifurcate end of described pivoted arm respectively, and the crossover sites of described pivoted arm then is arranged at described chi shell inwall rotationally by tumbler shaft.

Actuator in the second way is preferably as follows the setting of four kinds of modes:

A, described actuator are a torsion spring, and aforesaid torsion spring is then on socket and the aforesaid tumbler shaft and act on the described pivoted arm.

B, described actuator are compression spring, and this compression spring one end links to each other with the described pivoted arm or the roller outside, and the other end then links to each other with described chi shell inwall.

C, described actuator are tension spring, and this tension spring one end links to each other with the inboard of described pivoted arm or roller, and the other end then links to each other with described chi shell inwall.

D, described roller are arranged on the described pivoted arm by roller shaft, and described actuator is a tension spring, and this tension spring one end links to each other with aforesaid roller shaft, and the other end then links to each other with described chi shell inwall.

Compared with prior art, the invention has the advantages that: set up automatic hold-fast body the chi band is wound on the chi core dish all the time compactly, thereby stop " expansible band " phenomenon, it is deft smooth-going that chi is brought into out, reduced the probability to the damage of chi band, guarantees the normal operation of tape measure, the compactness of automatic hold-fast body design, simple and reasonable and use, simultaneously existing tape measure is changed lessly, volume is almost without any increase.

Description of drawings

Fig. 1 is the structural representation after embodiment 1 removes anti-chi shell.

Fig. 2 is the structural representation behind the chi core dish section among Fig. 2.

Fig. 3 is the decomposition assembling figure of embodiment 1.

Fig. 4 pulls out the back structural representation for chi band among the embodiment 1.

Fig. 5 is embodiment 2 structural representations.

Fig. 6 is embodiment 3 structural representations.

Fig. 7 is embodiment 4 structural representations.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Embodiment 1: with reference to figure 1, Fig. 2, Fig. 3 and shown in Figure 4, the electric band tape in the present embodiment comprises the chi shell, chi core dish 14, motor 13, battery 4, switch 16, gear train and automatic hold-fast body.

The chi shell is combined by positive chi shell 1 and anti-chi shell 11, and has accommodation space, and chi core dish 14 is located in the cavity of chi shell middle part rotationally and is wound with chi band 15.

Motor 13 is located in the chi shell, and by 14 interlocks of a gear train and chi core dish to realize stretching out and the aforementioned chi shell of indentation of chi band, motor 13 is to be packed into outward by the chi shell, owing to during production demoulding angle must be arranged, forming the chi shell like this, to hold the oral area of motor 13 cavitys big and the bottom is little, and motor 13 is packed into outward by the chi shell and can be guaranteed the quality of fit and the accuracy of motor 13 and chi shell.

Switch 16 operative end are provided with button 17, can positive and negative operation so that motor 13 positive and negative bricks, battery 4 is located in the battery cavity of chi shell, seals with battery cover 5.Switch 16, motor 13 and battery 4 constitute power circuit.

Gear train is made up of with the driving gear 12 that is connected with the driving of motor 13 output shafts driving gear set 3, and accordingly, positive chi shell 1 inwall fixedly has pinion stand 2, is used to be provided with driving gear set 3.

Automatically hold-fast body is two groups, left and right symmetrically is arranged at chi core dish 14 outer peripheral faces, automatically hold-fast body acts on chi band 15 and forces chi band 15 to be wound in compactly all the time on the chi core dish 14 along chi core disc radial, and every group of automatic hold-fast body specifically comprises pivoted arm 9, roller 8 and actuator.

Pivoted arm 9 is herringbone, and two rollers 8 are arranged at the bifurcate end of pivoted arm 9 respectively by roller shaft 7 and offset with chi band 15 on the chi core dish 14, and the crossover sites of pivoted arm 9 then is arranged at positive chi shell 1 inwall rotationally by a tumbler shaft 6.Actuator acts on pivoted arm 9 all the time and forces roller 8 and chi band 15 to offset, and the actuator in the present embodiment adopts torsion spring 10, and torsion spring 10 is socketed on the tumbler shaft 6 and acts on the pivoted arm 9, and torsion spring 10 is given the power that pivoted arm 9 is held chi core dish 14 tightly.

Principle of work: when stretching chi band 15 outside the chi shell and need to regain, driving driving gear set 3 by motor 13 rotates, be with chi core dish 14 to rotate by driving gear set 3 again, because an end of chi band 15 is to be fixed on the chi core dish 14, thereby 14 rotations of chi core dish can be with chi band 15 to do the motion of reeling, chi band 15 can increase and the also and then increase of diameter of chi core dish 14 along with the number of turns of volume when reeling, because the actuator of pivoted arm 9 is a torsion spring 10, the chi band 15 of reeling on chi core dish 14 increases and forces pivoted arm 9 to open, do precompressed and energy storage campaign at the pivoted arm 9 open torsion springs 10 that can force simultaneously, simultaneously torsion spring 10 can force in pivoted arm 9 all the time and makes roller 8 on the pivoted arm 9 have chi band 15 on the chi core dish 14 all the time in arms.

When the chi band 15 in the chi shell of crispaturaing need stretch out, driving driving gear set 3 by motor 13 rotates, be with chi core dish 14 to rotate by driving gear set 3 again, because chi band 15 is to be wound on the chi core dish 14, the chi band 15 that chi core dish 14 is wound on the chi core dish 14 when rotating can and then rotate and do stretching routine, in the process of rotating and stretching, because pivoted arm 9 has certain power to have in arms to be wound on the chi band 15 on the chi core dish 14 all the time, thereby force chi band 15 to stretch out housing, when chi band 15 stretches out housing, chi band 15 number of turns that are wound on the chi core dish 14 are fewer and feweri, thereby the diameter of chi core dish 14 also and then diminishes, pivoted arm 9 is subjected to the twisting resistance effect of torsion spring 10 when chi core dish 14 diameters diminish, thereby dwindle the diameter that pivoted arm 9 is embraced, so be wound in the state of holding tightly that chi band 15 on the chi core dish 14 can be in pivoted arm 9 all the time, make chi band 15 stretch out housing swimmingly, do not cause chi band 15 normally not stretch out and can in housing, not produce expansible band.

Embodiment 2: with reference to shown in Figure 5, the actuator of the automatic hold-fast body in the present embodiment adopts reed 9a, and this reed 9a serves as the pivoted arm function.

Reed 9a is herringbone substantially, and the intersection intermediate location of reed 9a is arranged at chi shell inwall rotationally by a

reed axle

6a, and 6a is wrapped with split bush at the reed axle, plays protection and limit effect.Roller 8 is two, is arranged at the bifurcate end of reed 9a respectively rotationally by roller shaft 7, roller 13 under self elastic force effect of reed 9a with chi core dish 14 on chi band 15 offset.Other structures and principle of work are identical with embodiment 1.

Embodiment 3: with reference to shown in Figure 6, the actuator of the automatic hold-fast body in the present embodiment adopts compression spring 10a, and compression spring 10a one end links to each other with pivoted arm 9 outsides, and the other end then links to each other with the 1a of projection portion on the chi shell inwall.Other structures and principle of work are identical with embodiment 1.

Embodiment 4: with reference to shown in Figure 7, the actuator of the automatic hold-fast body in the present embodiment adopts tension spring 10b, and tension spring 10b one end links to each other with roller shaft 7, and the other end then links to each other with the 1b of projection portion on the chi shell inwall.Other structures and principle of work are identical with embodiment 1.

Claims

1, a kind of electric band tape comprises

The chi shell has accommodation space;

2, electric band tape according to claim 1 is characterized in that described automatic hold-fast body acts on described chi band along described chi core disc radial.

3, electric band tape according to claim 2, it is characterized in that described automatic hold-fast body comprises as the reed of pivoted arm and is arranged at the roller of aforementioned leaf end rotationally, aforementioned reed is arranged at described chi shell inwall rotationally, aforementioned roller under self elastic force effect of aforementioned reed with described chi core dish on the chi band offset.

4, electric band tape according to claim 3, it is characterized in that described reed is herringbone substantially, described roller is two, is arranged at the bifurcate end of described reed respectively, and the intersection intermediate location of described reed then is arranged at described chi shell inwall rotationally by the reed axle.

5, electric band tape according to claim 2 is characterized in that described automatic hold-fast body comprises

Pivoted arm is arranged at described chi shell inwall rotationally;

6, electric band tape according to claim 5, it is characterized in that described pivoted arm is herringbone, described roller is two, is arranged at the bifurcate end of described pivoted arm respectively, and the crossover sites of described pivoted arm then is arranged at described chi shell inwall rotationally by tumbler shaft point.

7, according to claim 5 or 6 described electric band tapes, it is characterized in that described actuator is a torsion spring, aforesaid torsion spring is then on socket and the aforesaid tumbler shaft and act on the described pivoted arm.

8, according to claim 5 or 6 described electric band tapes, it is characterized in that described actuator is a compression spring, this compression spring one end links to each other with the described pivoted arm or the roller outside, and the other end then links to each other with described chi shell inwall.

9, according to claim 5 or 6 described electric band tapes, it is characterized in that described actuator is a tension spring, this tension spring one end links to each other with the inboard of described pivoted arm or roller, and the other end then links to each other with described chi shell inwall.

10, according to claim 5 or 6 described electric band tapes, it is characterized in that described roller is arranged on the described pivoted arm by roller shaft, described actuator is a tension spring, and this tension spring one end links to each other with aforesaid roller shaft, and the other end then links to each other with described chi shell inwall.