CN101625222A

CN101625222A - Flexible rule

Info

Publication number: CN101625222A
Application number: CN200810063108A
Authority: CN
Inventors: 黄忠华; 张令辉
Original assignee: 吴其联
Priority date: 2008-07-11
Filing date: 2008-07-11
Publication date: 2010-01-13

Abstract

The invention relates to a flexible rule, which comprises the following parts: a shell; a handle seat (4) arranged on the shell; a handle handgrip (1) of which one end is connected with the handle seat (4); a rule core plate (11) for driving rule strip to be drawn out and coiled; and a driving mechanism which is used for transmitting the driving force of the handle handgrip (1) to the rule core plate (11) and is arranged in the shell and positioned between the handle seat (4) and the rule core plate (11). The flexible rule is characterized by further comprising a damping mechanism which can instantaneously stop the rule core plate (11) from rotating continuously when the rule strip is in the drawn out state or in the coiled state. Compared with the prior art, the flexible rule has the following advantages that: the increased damping mechanism can stop the rule core plate instantaneously without being influenced by the inertia force and the elastic force of the stretching of the rule strip so that the rule core plate stops rotating; the flexible rule not only can prevent expansible band and dispersion, but also can reduce the impacts caused by the self-rotation of the rule core plate, and prolong the service life of the flexible life; besides, when the rule strip is drawn out, the length can be controlled accurately.

Description

A kind of tape measure

Technical field

The present invention relates to a kind of tape measure.

Background technology

Existing hand-rail type tape measure, point simple in structure, generally comprise housing, jack back and be positioned at the tape measure dish of housing, jack back is connected with the tape measure dish and forms one, is fixed with the chi band on the tape measure dish, when outwards spurring the chi band, the tape measure dish rotates thereupon, also rotates with tape measure dish type all-in-one-piece jack back, otherwise, by shaking rocking bar, and then rocking bar drives the tape measure dish chi is taken back receipts.The speed that common this kind tape measure jack back shakes equals the speed of tape measure dish, and when the chi band was pulled out, jack back also rotated thereupon, if speed is too fast, and the operating personnel around being easy to hurt, security has much room for improvement.

As improvement, make between tape measure dish and the jack back and to produce a velocity contrast setting up a planetary gears between tape measure dish and the jack back, one can reduce the time of reclaiming the chi band, can reduce the slewing rate of jack back when pulling out the chi band fast.As the patent No. is Chinese utility model patent " jack of the tape measure " (Granted publication number: CN2374839Y) of ZL99225503.1, this patent comprises: preceding wall body, back wall body, gear train, be characterized in gear train by jack back, rolling disc, set collar, chuck, and the tape measure dish constitutes; Set collar interior ring edge portion, have a gear rail to be meshed with a plurality of satellite gears, satellite gear places on the interior a plurality of outstanding minor axis of rolling disc, in the middle of the rolling disc, be extruded with a stationary shaft, chuck can rotate on stationary shaft, and chuck one side has a transmission gear, and transmission gear is meshed with each satellite gear, there is projection the another side, projection snaps in the tape measure dish, can drive the tape measure dish and rotate, and the tape measure dish rotates in the formed bead of back wall body.And for example the patent No. is Chinese utility model patent " a kind of tape measure with one-way driving mechanism " (Granted publication number: CN201050972Y) of ZL200720110845.1.

The another kind of improvement is by set up clutch on tape measure, particularly, when reclaiming the chi band, this clutch is in bonding state, jack back shakes and can drive tape measure dish recovery chi band, and when pulling out the chi band, this clutch is in released state, the tape measure dish can rotate, and jack back is then slack.With reference to Chinese utility model patent: ZL02207192.X, a kind of " one-way driving mechanism of tape measure " (publication number: CN2581938Y) is disclosed, handle fuses by bearing pin and inner rotary table in this patent, inner rotary table and outer rotary table are installed in the supported hole of tape measure housing, can rotate therein, it is characterized in that: outer rotary table is provided with the rotating disk engaging piece, and handle is provided with engagement portion.By the location status of change handle, thereby realize the engagement between parts and remove engagement that when unreeling, handle just is independent of chi band rotating mechanism, thereby has avoided hurting sb.'s feelings like this.

Again with reference to Chinese utility model patent: ZL200420066462.5, a kind of " tape measure that has the clutch crank " (publication number: CN2722193Y) is disclosed, comprise chi frame, chi band, chi belt wheel, terminal pad, rocking arm and handle, the axle of chi belt wheel is rotatably connected in the chi frame, the chi frame that one end of chi belt shaft passes a side is hinged by terminal pad and rocking arm one end, and the other end of this rocking arm connects handle; Chi band one end connects and twists in the side face of chi belt wheel; Be provided with the spacing hole corresponding with described handle on described chi frame, it is characterized in that: the axle of described terminal pad and chi belt wheel is rotationally connected, and is provided with clutch between the two at them, and further, this clutch coupling comprises rotating disk, clutch pit and terminal pad.This patent adopts another kind of clutch structure to solve the common problem that produces when shaking the rolling tape measure and unreeling.

In sum, though done many improvement, reached certain technique effect, but above-mentioned patent is the following problem of ubiquity also: do the time spent in termination external force, because inertial force exists, chi core dish can not be braked at once, like this when reclaiming, chi core dish has certain percussive action to the internal mechanism of tape measure, accumulating over a long period causes the parts damage easily, moreover the chi band is around relaxing, at random, easily cause expansible band; When pulling was extracted out, chi band or length or weak point were difficult to control suitable length

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of tape measure that has damping mechanism at the above-mentioned state of the art, the elastic force that the damping mechanism of this tape measure can not stretched by inertial force and chi band the braking of chi core dish influences, chi core dish is stopped operating, so promptly can prevent expansible band, at randomly can reduce the impact that chi core dish brings because of rotation again.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of tape measure comprises

Housing;

The seat of shaking the hand is located on the aforementioned housing;

Crank handle, an end are connected on the aforementioned seat of shaking the hand;

Chi core dish is located in the aforementioned housing, is used to drive the chi band and extracts out and rolling;

Gear train is used for the driving force of aforementioned crank handle is delivered to aforementioned chi core dish, is located in the aforementioned housing and is shaking the hand between seat and the chi core dish;

It is characterized in that this tape measure comprises also that the chi band is in and pulls out or damping mechanism that the recovery state down can the described chi core of instantaneous stop dish be rotated further.

Further, described damping mechanism is located at described shaking the hand between seat and the gear train.

The concrete set-up mode of gear train is preferably as follows design: described gear train comprises

Annular wheel, leading section convex with the clutch tooth, and the rearward end madial wall has annular internal tooth;

Outer rotor, be located at described chi core disk center and with the engagement of aforesaid annular internal tooth,

Accordingly, the described base rear end portion of shaking the hand has the clutch slot that cooperates with aforementioned clutch tooth, described damping mechanism then between the rear end face and the front end face of annular wheel of the described seat of shaking the hand.

Further structure optimization structural design: also be provided with a back up pad between described annular wheel and the chi core dish, this back up pad has eccentric orfice, and the outer rotor rearward end also has a minor axis in the middle part of the described chi core dish, and this minor axis is positioned at aforementioned eccentric orfice and presents and be rotatably assorted.

Damping mechanism can adopt following several mode to design:

First kind: described damping mechanism comprise first friction disc, second friction disc and be located at first friction disc and second friction disc between extruded spring leaf.

Second kind: described damping mechanism comprises compression spring and is located at an end and hoodle or the friction disc that the base rear end face offsets of shaking the hand, described annular wheel front end face has groove, and described compression spring leading section contacts with hoodle or friction disc, and rearward end then offsets with the aforementioned grooves bottom.

The third: described damping mechanism is to be located at described annular wheel front end face and shake the hand elastic body or disk spring between the base rear end face.

The 4th kind: described damping mechanism comprises

Friction block offsets with described annular wheel leading section madial wall;

Shell fragment, radial arrangement are in the described base rear end face of shaking the hand, and this shell fragment one end is connected with the columnar portion that the described base rear end face of shaking the hand is convexly equipped with, and the other end is connected with aforementioned friction block.

The 5th kind, described damping mechanism comprises two arc friction discs, two arc friction discs are all around described annular wheel middle part via arrangement, the equal rotary type of one end of each arc friction disc is arranged at described annular wheel front end face, the other end interconnects by a tension spring, and the described base rear end face of shaking the hand convexes with the columnar portion of inserting the annular wheel through hole.

At last, described housing is furnished with the bayonet socket that blocks for crank handle on handle portion, be exactly that crank handle does not rotate like this, and the chi band on the chi core dish movingly also can go out band down pulling, and it is more reasonable than original design to use.

Compared with prior art, the invention has the advantages that: the elastic force that the damping mechanism of setting up can not stretched by inertial force and chi band the moment braking of chi core dish influences, chi core dish is stopped operating, so promptly can prevent expansible band, the impact that chi core dish brings because of rotation, the term of life that prolongs tape measure of can reducing again at random; And the chi band is when pulling out, and length can accurately be controlled.

Description of drawings

Fig. 1 is embodiment 1 schematic appearance.

Fig. 2 is the cut-open view of Fig. 1 along the A-A direction.

The decomposition assembling figure that Fig. 3 dwindles for embodiment 1.

Fig. 4 is the decomposition assembling figure at embodiment 1 another visual angle.

Fig. 5 is embodiment 2 structural representations.

Fig. 6 is embodiment 3 structural representations.

Fig. 7 is embodiment 4 structural representations.

Fig. 8 is embodiment 5 structural representations.

Fig. 9 is embodiment 6 structural representations.

Figure 10 is embodiment 7 structural representations.

Figure 11 is embodiment 8 structural representations.

Figure 12 is embodiment 9 structural representations.

Embodiment

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

Embodiment 1, and referring to figs. 1 to shown in Figure 4, the tape measure in the present embodiment comprises housing, shake the hand seat 4, crank handle 1, chi core dish 11, chi band 12, back up pad 10, gear train and damping mechanism.

Housing is assembled by last first housing 2 and second housing 13, has handle portion 21 on the housing, and chi band 12 coils on chi core dish 11.

The seat 4 of shaking the hand is located on first housing, and rearward end has clutch slot, and crank handle 1 one ends are by a straight pin 3 hinged being connected on the seat 4 of shaking the hand, and the other end is that free end then shakes operation for using, and chi core dish 11 is located in the housing, is used to drive chi band 12 and extracts out and rolling.

Gear train also is located in the housing and shaking the hand between seat 4 and the chi core dish 11, is used for the driving force of crank handle 1 is delivered to chi core dish 11.

Gear train comprises annular wheel 7 and outer rotor 11a, annular wheel 7 is connected with the seat 4 of shaking the hand rotationally, particularly, being arranged at rotationally by a circular washer 8 and screw 9 on the columnar portion 41 of the seat 4 of shaking the hand, can certainly be that other rotation set-up mode is realized connecting.Annular wheel 7 leading sections convex with clutch tooth 7a, and this clutch tooth 7a can cooperate with the clutch slot of the seat 4 of shaking the hand, and annular wheel 7 rearward end madial walls have annular internal tooth 71, and outer rotor 11a is located at chi core dish 11 centers and meshes with annular internal tooth 71.

Damping mechanism is located between the front end face of shake the hand seat 4 rear end face and annular wheel 7, pulls out or a damping action that the recovery state down can instantaneous stop chi core dish 11 be rotated further when chi band 12 is in.Specifically comprise first friction disc 5, the second friction disc 5a and be located at first friction disc 5 and the second friction disc 5a between extruded spring leaf 6, be hit by a bullet reed 6 of present embodiment is the wavy spring sheet.First friction disc 5 and the second friction disc 5a are fixed together by the mounting groove on nicked perforate (profile hole) and separately shake the hand seat 4 and the annular wheel 7.

Back up pad 10 is fixedly arranged on first housing, 2 inner chambers and between annular wheel 7 and chi core dish 11, this back up pad 10 has eccentric orfice 10a, and chi core dish 11 middle part outer rotor 11a rearward end also have a minor axis 11b, and minor axis 11b is positioned at eccentric orfice 10a and presents and be rotatably assorted.

At last, housing is furnished with the bayonet socket 22 that blocks for crank handle 1 on handle portion 2.

Principle of work: when twitching chi band 12, chi band 12 drives chi core dish 11 and rotates, driving annular wheel 7 by the outer rotor 11a on the chi core dish 11 rotates, annular wheel 7 drives the seat 4 of shaking the hand by first friction disc 5, the second friction disc 5a and spring leaf 6 and rotates, the wind 1 that connects on the seat 4 owing to shake the hand is blocked by the handle portion 21 of tape measure, the seat 4 of shaking the hand can not be rotated, when the power of twitching chi band 12 during greater than the resistance of friction disc 5 and spring leaf 6, annular wheel 7 is rotated further, and seat 4 transfixions of shaking the hand can continue band;

When external force stops, the seat 4 of shaking the hand is transfixions, clutch slot even shake the hand on the seat 4 and the clutch tooth 7a on the annular wheel 7 are under state, because damping mechanism can stop the inertia of annular wheel 7 to rotate, when annular wheel 7 stops operating, force chi core dish 11 to stop operating by outer rotor 11a on the chi core dish 11, reach like this external force stop chi core dish 11 also moment the purpose that stops operating.

When chi band 12 needs to regain, the handle that wind 1 is left tape measure pushes away inward a little, shake wind 1 and drive seat 4 rotations of shaking the hand, driving annular wheel 7 by clutch tooth 7a and clutch slot when the seat 4 of shaking the hand rotates rotates, annular wheel 7 power transmissions make its rotation in outer rotor 11a, drive chi core dish 11 when outer rotor 11a rotates and rotate, chi band 12 just has been recoverable to like this.

Embodiment 2, with reference to shown in Figure 5, the damping mechanism of tape measure comprises compression spring 6a and is located at an end and the hoodle 5b that offsets of seat 4 rear end faces that shakes the hand in the present embodiment, annular wheel 7 front end faces have groove, compression spring 6a leading section contacts with hoodle 5b, and rearward end then offsets with annular wheel 7 bottom portion of groove.Other structures and principle of work are identical with embodiment 1.

Embodiment 3, with reference to shown in Figure 6, the damping mechanism of tape measure comprises compression spring 6a and is located at an end and the profile of tooth spring 5c that offsets of seat 4 rear end faces that shakes the hand in the present embodiment, annular wheel 7 front end faces have groove, compression spring 6a leading section contacts with profile of tooth spring 5c, and rearward end then offsets with annular wheel 7 bottom portion of groove.Other structures and principle of work are identical with embodiment 1.

Embodiment 4, with reference to shown in Figure 7, the damping mechanism of the tape measure in the present embodiment comprises compression spring 6a and is located at an end and the planar friction sheet 5d that offsets of seat 4 rear end faces that shakes the hand, annular wheel 7 front end faces have groove, compression spring 6a leading section contacts with planar friction sheet 5d, and rearward end then offsets with annular wheel 7 bottom portion of groove.Other structures and principle of work are identical with embodiment 1.

Embodiment 5, and with reference to shown in Figure 8, the damping mechanism of the tape measure in the present embodiment is a butterfly spring 5e, and butterfly spring 5e two ends offset with shake the hand seat 4 rear end faces and annular wheel 7 front end faces respectively.Other structures and principle of work are identical with embodiment 1.

Embodiment 6, and with reference to shown in Figure 9, the damping mechanism of the tape measure in the present embodiment is a turriform (or taper) spring 5e, and butterfly spring 5e two ends offset with shake the hand seat 4 rear end faces and annular wheel 7 front end faces respectively.Other structures and principle of work are identical with embodiment 1.

Embodiment 7, and with reference to shown in Figure 10, the damping mechanism of the tape measure in the present embodiment is an elastic body 5i, and elastic body 5i two ends offset with shake the hand seat 4 rear end faces and annular wheel 7 front end faces respectively.Other structures and principle of work are identical with embodiment 1.

Embodiment 8, with reference to shown in Figure 11, the damping mechanism of the tape measure in the present embodiment comprises three friction block 5g and three shell fragment 6b, each friction block 5g and annular wheel 7 leading section madial walls offset, each shell fragment 6b radial arrangement is in seat 4 rear end faces of shaking the hand, this shell fragment 6b one end is connected with the columnar portion 41 that seat 4 rear end faces of shaking the hand are convexly equipped with, and the other end is connected with aforementioned friction block 5g.All the time be in the friction stress between the columnar portion 41 that the acting in conjunction of shell fragment 6b and friction block 5g makes annular wheel 7 leading section madial walls and seat 4 rear end faces of shaking the hand are convexly equipped with, play damping action.Other structures and principle of work are identical with embodiment 1.

Embodiment 9, with reference to shown in Figure 12, the damping mechanism of the tape measure in the present embodiment comprises two arc friction disc 5h, two arc friction disc 5h are all around annular wheel middle part via arrangement, the end of each arc friction disc 5h is arranged at annular wheel 7 front end faces with the equal rotary type of pin, the other end interconnects by a tension spring 6c, and seat 4 rear end faces of shaking the hand convex with the columnar portion 41 of inserting the annular wheel through hole.Under the duty, two arc friction disc 5h tightly embrace columnar portion 41, make annular wheel 7 front end faces and shake the hand to be in the friction stress all the time between the columnar portion 41 that is convexly equipped with of seat 4 rear end faces, play damping action.Other structures and principle of work are identical with embodiment 1.

Claims

1, a kind of tape measure comprises

Housing;

Shake the hand (4), be located on the aforementioned housing;

Crank handle (1), an end are connected on the aforementioned seat (4) of shaking the hand;

Chi core dish (11) is located in the aforementioned housing, is used to drive the chi band and extracts out and rolling;

Gear train is used for the driving force of aforementioned crank handle (1) is delivered to aforementioned chi core dish (11), is located in the aforementioned housing and is positioned at and shake the hand between seat (4) and the chi core dish (11);

It is characterized in that also including the chi band is in and pulls out or damping mechanism that the recovery state down can instantaneous stop described chi core dish (11) be rotated further.

2, tape measure according to claim 1 is characterized in that described damping mechanism is located at described shaking the hand between seat (4) and the gear train.

3, tape measure according to claim 2 is characterized in that described gear train comprises:

Annular wheel (7), leading section convex with clutch tooth (7a), and the rearward end madial wall has annular internal tooth (71);

Outer rotor (11a), be located at described chi core dish (11) center and with aforesaid annular internal tooth (71) engagement,

Accordingly, described seat (4) rearward end of shaking the hand has the clutch slot that cooperates with aforementioned clutch tooth (7a), and described damping mechanism then is positioned between the front end face of a rear end face of described shake the hand (4) and annular wheel (7).

4, tape measure according to claim 3, it is characterized in that also being provided with a back up pad (10) between described annular wheel (7) and the chi core dish (11), this back up pad (10) has eccentric orfice (10a), described chi core dish (11) middle part outer rotor (11a) rearward end also has a minor axis (11b), and this minor axis (11b) is positioned at aforementioned eccentric orfice (10a) and presents and be rotatably assorted.

5, according to the described tape measure of the arbitrary claim of claim 1～4, it is characterized in that described damping mechanism comprise first friction disc (5), second friction disc (5a) and be located at first friction disc (5) and second friction disc (5a) between extruded spring leaf (6).

6, according to the described tape measure of the arbitrary claim of claim 1～4, it is characterized in that described damping mechanism comprises compression spring (6a) and is located at an end and hoodle (5b) or the friction disc (5c) that the base rear end face offsets of shaking the hand, described annular wheel (7) front end face has groove, and described compression spring (6a) leading section contacts with hoodle (5b) or friction disc (5c), and rearward end then offsets with the aforementioned grooves bottom.

7,, it is characterized in that described damping mechanism is to be located at described annular wheel (7) front end face and to shake the hand elastic body (5e) or the disk spring of seat between (4) rear end face according to the described tape measure of the arbitrary claim of claim 1～4.

8,, it is characterized in that described damping mechanism comprises according to the described tape measure of the arbitrary claim of claim 1～4

Friction block (5g) offsets with described annular wheel (7) leading section madial wall;

Shell fragment (6b), radial arrangement are in described seat (4) rear end face of shaking the hand, and this shell fragment (6b) end is connected with the columnar portion (41) that described seat (4) rear end face of shaking the hand is convexly equipped with, and the other end is connected with aforementioned friction block (5g).

9, according to the described tape measure of the arbitrary claim of claim 1～4, it is characterized in that described damping mechanism comprises two arc friction discs (5h), two arc friction discs (5h) are all around described annular wheel middle part via arrangement, the equal rotary type of one end of each arc friction disc (5h) is arranged at described annular wheel (7) front end face, the other end interconnects by a tension spring (6c), and described seat (4) rear end face of shaking the hand convexes with the columnar portion (41) of inserting the annular wheel through hole.

10,, it is characterized in that described housing is furnished with the bayonet socket (22) that blocks for crank handle (1) on handle portion (2) according to the described tape measure of the arbitrary claim of claim 1～4.