CN201203393Y

CN201203393Y - Ruler belt brake band tape

Info

Publication number: CN201203393Y
Application number: CNU2008200878730U
Authority: CN
Inventors: 黄忠华; 张令辉
Original assignee: 吴其联
Current assignee: Ningbo Jufeng Tool Industrial Co.,Ltd.
Priority date: 2008-06-04
Filing date: 2008-06-04
Publication date: 2009-03-04
Anticipated expiration: 2018-06-04

Abstract

The utility model discloses a belt brake tape comprising a casing, a tape core disc, a tape belt and a tape spring. A tape brake for braking the part of the tape belt protruding out the tape core disc is arranged in the casing and comprises a brake mechanism, a potential energy mechanism, a brake operation mechanism and a connection mechanism, wherein the brake mechanism comprises a snap component which has a gradually reduced distance with the tape belt on the tape belt recovery direction and a movable sphere, the sphere is wedged between the snap component and the tape belt on the tape belt recovery direction, a corresponding support structure preventing tape belt from retrograde is arranged in the casing. The technical scheme adopts sphere wedged brake, reduces the abrasion to the tape belt surface from the brake component. Moreover the movable sphere structure enables the sphere for wedging to move the position in a small range, thereby the sphere can be effectively and reliably wedged between the tape and the snap component, and the demands for the material of the brake relative matching components and the processing precision are reduced and the production cost is saved.

Description

A kind of chi band brake tape measure

Technical field

The utility model relates to a kind of chi band brake tape measure, and it can realize the unidirectional Braking mode to the chi band.

Background technology

The tape measure volume is little, easy to carry, be widely used, general tape measure includes a housing, and a chi core dish is arranged, the chi band that is wound on the chi core dish is arranged, the application of force and the energy storage chi spring that make chi band automatic drawing back are arranged, and traditional tape measure generally is provided with the device and the resetting-mechanism that can make the chi band brake on housing, and relatively Chang Yong utilize push button or button carries out braking and locking, the chi band is stopped on its position that is drawn out, and also is arrestment mechanism is unclamped or to be reset to original state by push button or button during release.

In the prior art, the auto lock mode of adopting is also arranged, when this mode of employing, on the position after can making the chi band stop at it automatically from housing, to be drawn out, similarly document can reference: publication number is that the patent documentation of CN1967138A discloses " a kind of stopper mechanism with automatic locking fixed pattern ", this patent adopts roller to be fixed between chi band and the corresponding engaging part, thereby realizes the self-locking of chi band, and makes the arrestment mechanism release by action button; Publication number is that the patent documentation of CN200993562Y discloses " a kind of location involved in chi ", and this patent realizes the self-locking and the release of chi band by a Wedge clutch; Publication number is that the patent documentation of CN200996820Y discloses " a kind of tape measure with auto lock chi band and pressing button take-up structure ", elastic body is adopted in the brake block front portion in this patent, and rotates self-locking and the release that is achieved the chi band by this brake block lever.

Each above-mentioned brake structure, no matter be with roller, Wedge clutch, briquetting, or locking plate all employing face contact and lock the chi band, though retro-speed is very fast, but unexpected braking to the chi band, certainly will produce greater impact to tape measure housing and inner structure, reduce the serviceable life of product, and certain structures chi band need be finished unlocking operation earlier when pulling out, draw band tape to measure again, cause the inconvenience in the use; And because of brake component contacts braking with tape band surface, in the process of braking, will certainly produce friction, scale and literal on the chi band are worn, give to measure to use and make troubles with the chi band.

Summary of the invention

Goal of the invention of the present utility model, be to provide a kind of chi band brake tape measure, realize the auto lock of chi band is braked, pull out in the process at the chi band by unidirectional wedge fastening type detent is set in housing, detent discharges automatically, pulling chi band not can or the less resistance that is subjected to from detent, when the chi band has backrush trend, the detent Braking mode, stop the chi band to be regained voluntarily, when needs were regained the chi band, the manual release detent made chi core dish rotate and regains the chi band; And, adopt the braking of spheroid wedge fastening type, reduce the wearing and tearing of brake component to tape band surface, and, adopt the movable balls body structure, make the spheroid be fixed to usefulness can be among a small circle in the shift position, thereby can be fixed on more effectively reliably between chi band and the engaging part, reduce the material of braking relevant component and requirement on machining accuracy with the saving production cost.

The utility model is achieved by following technical solution:

A kind of chi band brake tape measure, comprise housing, rotate in the housing chi core dish is set, be wound with the chi band on the chi core dish, the opening of chi band on being located at housing stretches out outside the housing, described chi core dish is connected with the chi spring of regaining the chi band, is provided with in the described housing chi band is stretched out the chi band brake that the part of chi core dish is braked, and described chi band brake comprises:

One is used for the chi band application is added the arrestment mechanism of braking;

One gives the potential energy mechanism of potential energy all the time to arrestment mechanism towards braking direction;

One can operate the brake service mechanism of brake off from hull outside;

One connects the bindiny mechanism of arrestment mechanism and brake service mechanism;

Wherein, described arrestment mechanism is included in the chi band and regains on the direction the engaging part that the spacing with the chi band diminishes gradually and the spheroid of an activity, described spheroid is fixed between described engaging part and the chi band on the chi band is regained direction, is provided with in the described housing to prevent that accordingly the chi band from keeping away the supporting structure that moves back.

Below the utility model is elaborated, above said being fixed to be meant the wedging of parts and be clamped between two other parts, the spacing of these two other parts on the direction of above-mentioned parts wedging is more and more littler, to stop the further wedging of above-mentioned parts.Above-mentioned housing is meant takes in the parts of measurement with the chi band, it also is the main body of tape measure, housing is made of the resin material that forms desirable shape, vertically be provided with the chi mandrel on the sidewall in this housing, hinged on the chi mandrel have a chi core dish, reeling around this chi core dish and printing graduated measurement chi band; In addition, be provided with the chi spring (being generally volute spring) that is used to regain the chi band in the inside of this chi core dish, the chi band is endowed potential energy towards the direction of regaining thus; Housing normally utilizes the good resin material of formability to be shaped integratedly, utilizes other material or two kinds, multiple material framework such as metal material to form housing but also have.

On position such as above this housing front side, be provided with brake service mechanism in the mode that can operate from hull outside, arrestment mechanism is connected by bindiny mechanism with this brake service mechanism, is used for the chi band application is added braking.The main effect of bindiny mechanism is guiding and the scope of activities of restriction spheroid in housing, make it be fixed to as required or not to be fixed between chi band and the engaging part, the mode of finishing this function has a variety of, mainly can be divided into parallel moving mechanism push-and-pull spheroid or with rotating mechanism push-and-pull spheroid.As preferred version: above-mentioned bindiny mechanism comprises a support that can rotate around stationary shaft, and a transmission arm front end of support is provided with the spacing hole of snare spheroid, and another transmission arm of support is connected with brake service mechanism.Employing is provided with the spacing hole of snare spheroid on support that stationary shaft rotates and support, make spheroid both can under the guiding of support, rotate around stationary shaft, can also in spacing hole, freely rotate and move, so both guaranteed that spheroid can be fixed between chi band and the engaging part fast and effectively, can also use leverage, only need just can discharge detent, improved the comfort of tape measure by less power.

As preferred version, above-mentioned spacing hole is a through hole, spacing hole only to spheroid all around carry out simply spacing, it is moving only to place restrictions on the string of spheroid on withdrawal of chi band or pull-out direction, and this spheroid contacts with the direct wedging of engaging part, spheroid can be fixed between chi band and the engaging part fast and effectively like this, and because spheroid and tape band surface and engaging part are and some contacts or less face contacts, can be easily with spheroid from being fixed to position release.

As another improvement project, above-mentioned spacing hole is a blind hole, blind hole thin-walled on spheroid and the support is fixed between chi band and the engaging part together, above-mentioned support is provided with the locking face that contacts with the engaging part wedging, this spline structure, the shape that matches with spheroid is arranged at the blind hole top first, when braking, can increase the rubbing contact area of spheroid and support, thereby reach the effect of fast braking, moreover when also having avoided the chi band to spur fast, the spheroid string is moving too fast to be jumped out spacing hole or snaps between the parts.In addition, for easy for installation, above-mentioned two schemes all can be provided with the screens that can stop spheroid to drop out at the edge of spacing hole in assembling.

Be fixed to efficient and reliability in order to improve, above-mentioned spheroid is preferably elastic plastic material and makes, and be provided with any of salient point, concave point or asperities or their combination in any on its surface, with the raising skin-friction force, and produce elastic deformation and chi band and engaging part increase rubbing contact area when being necessary.

Above-mentioned supporting structure is generally the foot pin that is complementary with the chi band back side, and in order to increase friction force, above-mentioned foot pin surface can also be provided with any of salient point, concave point or asperities or their combination in any equally.Certainly foot pin can with the housing integrated injection molding, also can be mounted on the housing relatively independently, this especially selects for use under the situation of housing different materials at foot pin.

Above-mentioned engaging part is to realize friction catch for the further wedging that stops spheroid when spheroid is fixed to spheroid, and wherein, the suffered chi band impulsive force of spheroid should be passed to engaging part, and the structure of finishing these functions has a lot.As preferably, above-mentioned engaging part is the engaging muscle that is arranged on the housing, and in order to increase friction force, the surface of contact of this engaging muscle and spheroid is provided with any of salient point, concave point or asperities or their combination in any equally.Certainly, the surface of contact of above-mentioned engaging muscle can be the inclined-plane, can also be arc surface, can avoid like this when braking discharges, the engaging muscle be fixed to unnecessary contact friction between the parts, suffered stress in the time of also can disperseing it to brake simultaneously preferably; In addition, above-mentioned engaging part can also be arranged on flexure strip on the housing for an end, regain on the direction at the chi band, spacing between this flexure strip and the chi band is more and more littler, when spheroid is wedged between flexure strip and the chi band, flexure strip produces elastic deformation, and produces the further trend of wedging of bigger prevention spheroid, spheroid and chi tight braking with lock the most at last.

Above-mentioned potential energy mechanism impels support to regain direction to the chi band to rotate all the time, the counter-rotation that above-mentioned brake service mechanism can impel support to regain to the chi band.Above-mentioned potential energy mechanism is elastic components such as torsion spring, extension spring, stage clip or spring leaf, and the stiff end of elastic component connects housing, and the force side of elastic component connects support; Above-mentioned brake service mechanism comprises last button and the resetting-mechanism thereof that is arranged on hull outside, last button is connected with one and promotes the following extension rod of support with the counter-rotation of chi band withdrawal, following extension rod is connected with the transmission arm of support, and following extension rod contacts with the transmission arm inclined-plane or the cambered surface of support.Certainly, above-mentioned extension rod can also connect the transmission arm of support by intermediate bar pushing tow or drawing except the transmission arm of direct pushing tow or drawing connection support.In addition, operation for convenience, above-mentioned brake service mechanism also comprises knob down and the resetting-mechanism thereof that is arranged on hull outside, knob down is connected with one and promotes the last extension rod of support with the counter-rotation of chi band withdrawal, last extension rod is connected with support, so just can be according to using needs, button or knob down can be realized the operation to stopper mechanism in the selection.

Owing to adopted above technical scheme, tape measure is by spheroid wedge fastening type braking chi band, in braking is the contact point braking that utilizes spheroid and chi band in earlier stage, in the process that locking force strengthens gradually, become facet by point again, after the chi band is by stop, the surface of contact of spheroid and chi band remains seldom, the wearing and tearing of tape band surface high scale and literal have been reduced so as much as possible, can keep chi band high scale and literal clear for a long time, and, thereby the serviceable life of prolongation tape measure less to tape measure housing, chi band and inner structure impact; And the chi band does not need to carry out unlocking operation when extracting out, and extraction is also more laborsaving, can also locate automatically behind the extraction certain-length, and is easy to use; And, adopt the movable balls body structure, make the spheroid that is fixed to braking can be among a small circle in the shift position, thereby can be fixed between chi band and the engaging part more effectively reliably, reduced braking the material and the requirement on machining accuracy of the component of being correlated with; And, because it is movable being fixed to the spheroid of braking, not with any parts relative fixed, when being in any state, spheroid can both effectively reach self-locking requirement, in releasing process because spheroid is free movable, be not subjected to the constraint of axle or other link, thereby under equal condition, can effectively promote the shift motion of spheroid, make chi band, chi hook, rivet can both pass through brake area easily, this hanging down requires premium quality product can effectively reduce manufacturing cost, improves productivity effect.In addition, also have advantages such as simple in structure, that braking is reliable, use is comfortable.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the structural representation of the utility model embodiment 2;

Fig. 3 is the explosive view of embodiment 1;

Fig. 4 is the partial enlarged drawing (the engaging part surface of contact is a cambered surface) of embodiment 1.

Fig. 5 is the released state figure of Fig. 4.

Fig. 6 is the partial enlarged drawing (the engaging part surface of contact is the inclined-plane) of embodiment 1.

Fig. 7 is the released state figure of Fig. 6.

Fig. 8 is the partial enlarged drawing (engaging part is cylindric) of embodiment 2.

Fig. 9 is the released state figure of Fig. 8.

Figure 10 is the partial enlarged drawing (engaging part is the flat column with arc contact surface) of embodiment 2.

Figure 11 is the released state figure of Figure 10.

Reference numeral:

1, housing; 2, go up button; 3, stage clip; 4, torsion spring; 5, support; 6, spheroid; 7, knob down; 8, chi band; 9, chi core dish; 10, chi spring; 11, foot pin;

1a, stationary shaft; 1b, surface of contact are the engaging muscle of cambered surface; 1c, cylindric engaging muscle; 1d, has the column engaging muscle of arc contact surface; 1e, surface of contact are the engaging muscle on inclined-plane; Extension rod under the 2a; The transmission arm of 5a, support; Cylinder is protruded in 5b, side; 5c, locking face; 7a, last extension rod.

Embodiment

Below by drawings and Examples the utility model is further described:

Embodiment 1:

As Fig. 1, a kind of chi band brake tape measure shown in Figure 3, comprise housing 1, rotate in the housing 1 chi core dish 9 is set, be wound with chi band 8 on the chi core dish 9, the opening of chi band 8 on being located at housing 1 stretches out outside the housing 1, described chi core dish 9 is connected with the chi spring 10 of regaining chi band 8, is provided with in the described housing 1 chi band 8 is stretched out the chi band brake that the part of chi core dish 9 is braked, and described chi band brake comprises: one is used for chi band 8 is applied the arrestment mechanism of braking; One gives the potential energy mechanism of potential energy all the time to arrestment mechanism towards braking direction; One can operate the brake service mechanism of brake off from hull outside; One connects the bindiny mechanism of arrestment mechanism and brake service mechanism; Wherein, described arrestment mechanism is included in the chi band and regains on the direction the engaging part that the spacing with chi band 8 diminishes gradually and the spheroid 6 of an activity, described spheroid 6 is fixed between described engaging part and the chi band 8 on the chi band is regained direction, is provided with in the described housing 1 to prevent that accordingly chi band 8 from keeping away the supporting structure that moves back.

Above-mentioned bindiny mechanism comprises that one can be around the support 5 of stationary shaft 1a rotation, and a transmission arm front end of support 5 is provided with the spacing hole of snare spheroid 6, and another transmission arm of support 5 is connected with brake service mechanism; Above-mentioned spacing hole is a through hole, and described spheroid 6 contacts with the direct wedging of engaging part; Above-mentioned supporting structure is the foot pin 11 that is complementary with chi band 8 back sides; Above-mentioned engaging part is the engaging muscle that is arranged on the housing 1, described engaging muscle for the surface of contact of spheroid 6 be cambered surface engage muscle 1b; Above-mentioned potential energy mechanism forces support 5 to regain the torsion spring 4 that direction is rotated to the chi band; Above-mentioned brake service mechanism comprises last button 2 and the resetting-mechanism (being stage clip 3) thereof that is arranged on hull outside, last button 2 is connected with one and promotes the following extension rod 2a of support 5 with the counter-rotation of chi band withdrawal, following extension rod 2a is connected with the transmission arm of support 5, and described extension rod 2a lower end down contacts with the transmission arm 5a upper end cambered surface of support; Above-mentioned brake service mechanism also comprises knob down 7 and the resetting-mechanism (this resetting-mechanism can be given the trend of resetting for stage clip or by connected support) thereof that is arranged on hull outside, knob down 7 is connected with one and promotes the last extension rod 7a of support 5 with the counter-rotation of chi band withdrawal, and last extension rod 7a protrudes cylinder 5b by the two sides of pushing tow support and support is in transmission connection.

Fig. 4, shown in Figure 5 be the self-locking and the release synoptic diagram of tape measure, this tape measure has the engaging muscle 1b that surface of contact is a cambered surface; Its principle is as follows:

The surface of contact that housing 1 inwall stretches out is that the engaging muscle 1b and the chi band 8 of cambered surface forms certain included angle, spheroid 6 is by the effect of support 5 with torsionspring 4, the trend that the oriented all the time angle small end of spheroid 6 moves, when chi band 8 is pulled out, by the friction force of chi band 8 with spheroid 6, chi band 8 drives spheroid 6 and support 5 moves to the big end of angle, and chi band 8 just can be pulled out easily like this; After pulling out certain length, chi band 8 stops drag, the stretching force that is installed in the chi spring 10 in the chi core dish 9 when stopping drag is regained chi band 8, when chi band 8 is regained, because the trend that spheroid 6 and support 5 oriented angle small ends move, and by the friction force of chi band 8 with spheroid 6, chi band 8 is being with spheroid 6 to move to the angle small end equally, and spheroid 6 is clamped with the angle that engages muscle by chi band 8 like this, produce self-locking, chi band 8 just can not be regained like this; When chi band 8 needs to regain, by the downforce of last button 2, in the transmission arm 5a of support, force support 5 to drive spheroids 6 and move to the big end of engaging muscle and chi band 8 angles by the following extension rod 2a power transmission of last button 2, so can release, chi band 8 just can be regained by the power of chi spring 10; Perhaps the power of upwards pushing up by knob down 7 is protruded on the cylinder 5b in the side on the support 5 by knob down 7 power transmissions, forces support 5 to move with the big end of spheroid 6 to engaging muscle and chi band 8 angles, and chi band 8 just is recoverable to like this, can reach the purpose of release equally.

Fig. 6, shown in Figure 7 be the self-locking and the release synoptic diagram of tape measure, this tape measure has the engaging muscle 1e that surface of contact is the inclined-plane.Its operating principle is the same.

Embodiment 2:

A kind of chi band brake tape measure as shown in Figure 2 is that with the different of embodiment 1 above-mentioned spacing hole is a blind hole, and the blind hole top has the curved surface that cooperates with spheroid 6, and above-mentioned support 5 is provided with the locking face 5c that contacts with the engaging part wedging.

Fig. 8, shown in Figure 9 be the self-locking and the release synoptic diagram of tape measure, this tape measure has cylindric engaging muscle 1c, the engaging muscle can be used as the connection double-screw bolt of housing.Like this, when spheroid is fixed to braking, clamp-oned together between engaging muscle and the chi band by spheroid and support locking face 5c, the impulsive force that the chi band is regained is passed to the engaging muscle via spheroid, support.All the other operating principles are with embodiment 1.

Figure 10, shown in Figure 11 be the self-locking and the release synoptic diagram of tape measure, this tape measure has the column engaging muscle 1d of arc contact surface, its operating principle is the same.

Need to prove; above embodiment only is embodiment preferably more of the present utility model; be to further specifying of technical solutions of the utility model and non-limiting, the improvement of making of any employing the utility model connotation is still in protection domain of the present utility model.

Claims

1. chi band brake tape measure, comprise housing (1), rotate in the housing (1) chi core dish (9) is set, be wound with chi band (8) on the chi core dish (9), the opening of chi band (8) on being located at housing (1) stretches out outside the housing (1), and described chi core dish (9) is connected with the chi spring (10) of regaining chi band (8), is provided with in the described housing (1) chi band (8) is stretched out the chi band brake that the part of chi core dish (9) is braked, it is characterized in that described chi band brake comprises:

One is used for chi band (8) is applied the arrestment mechanism of braking;

One can operate the brake service mechanism of brake off from hull outside;

Wherein, described arrestment mechanism is included in the chi band and regains on the direction the engaging part that the spacing with chi band (8) diminishes gradually and the spheroid (6) of an activity, described spheroid (6) is fixed between described engaging part and the chi band (8) on the chi band is regained direction, is provided with in the described housing (1) to prevent that accordingly chi band (8) from keeping away the supporting structure that moves back.

2. a kind of chi band brake tape measure according to claim 1, it is characterized in that, described bindiny mechanism comprises that one can be around the support (5) of stationary shaft (1a) rotation, a transmission arm front end of support (5) is provided with the spacing hole of snare spheroid (6), and another transmission arm of support (5) is connected with brake service mechanism.

3. a kind of chi band brake tape measure according to claim 2 is characterized in that described spacing hole is a through hole, and described spheroid (6) contacts with the direct wedging of engaging part.

4. a kind of chi band brake tape measure according to claim 2 is characterized in that described spacing hole is a blind hole, and described support (5) is provided with the locking face (5c) that contacts with the engaging part wedging.

5. according to claim 3 or 4 described a kind of chi band brake tape measures, it is characterized in that described spheroid (6) is made for elastic plastic material, its surface is provided with any of salient point, concave point or asperities or their combination in any.

6. according to each described a kind of chi band brake tape measure in the claim 1 to 4, it is characterized in that, described supporting structure is the foot pin (11) that is complementary with chi band (8) back side, and described foot pin (11) surface is provided with any of salient point, concave point or asperities or their combination in any.

7. according to each described a kind of chi band brake tape measure in the claim 1 to 4, it is characterized in that, described engaging part is for being arranged on the engaging muscle on the housing (1), the surface of contact of described engaging muscle is an arc surface, and surface of contact is provided with any of salient point, concave point or asperities or their combination in any.

8. according to each described a kind of chi band brake tape measure in the claim 2 to 4, it is characterized in that torsion spring, stage clip, extension spring or the spring leaf of described potential energy mechanism for forcing support (5) to rotate to chi band withdrawal direction.

9. according to claim 3 or 4 described a kind of chi band brake tape measures, it is characterized in that, described brake service mechanism comprises last button (2) and the resetting-mechanism thereof that is arranged on hull outside, last button (2) is connected with one and promotes the following extension rod (2a) of support (5) with the counter-rotation of chi band withdrawal, following extension rod (2a) is connected with the transmission arm of support (5), and described extension rod (2a) down contacts with the transmission arm inclined-plane or the cambered surface of support (5).

10. a kind of chi band brake tape measure according to claim 9, it is characterized in that, described brake service mechanism comprises knob down (7) and the resetting-mechanism thereof that is arranged on hull outside, knob down (7) is connected with one and promotes the last extension rod (7a) of support (5) with the counter-rotation of chi band withdrawal, and last extension rod (7a) is connected with support (5).