CN109458890B

CN109458890B - Measuring tape

Info

Publication number: CN109458890B
Application number: CN201811576117.9A
Authority: CN
Inventors: 潘德苗
Original assignee: Ningbo Panyi Garden Tools Co ltd
Current assignee: Ningbo Panyi Garden Tools Co ltd
Priority date: 2018-12-22
Filing date: 2018-12-22
Publication date: 2021-02-19
Anticipated expiration: 2038-12-22
Also published as: CN109458890A

Abstract

The invention discloses a tape measure which comprises a tape measure shell, a winding drum, a tape measure belt and a speed regulator, wherein the speed regulator comprises a rotating wheel and a damping piece, the rotating wheel is rotationally connected with the winding drum, the damping piece provides rotational resistance for the rotating wheel, the damping piece is arranged on the tape measure shell, a ratchet and pawl mechanism used for enabling the winding drum to drive the rotating wheel to rotate in a single direction is arranged between the rotating wheel and the winding drum, and the winding drum drives the rotating wheel to rotate when the tape measure belt is retracted. When the tape is pulled out, the tape drives the winding drum to rotate, the ratchet wheel and pawl assembly is in an unmeshed state, the rotating wheel cannot be driven to rotate under the interference of the damping piece, and the tape can be normally used and is very easy to pull out; when the ruler tape is withdrawn, the winding drum is driven by the elastic force of the coil spring to rotate reversely to drive the ruler tape to withdraw, at the moment, under the action of the ratchet wheel and pawl mechanism, the winding drum drives the rotating wheel to rotate, and the rotating wheel can reduce the rotating speed of the rotating wheel and the winding drum under the damping of the damping piece, so that the withdrawing speed of the ruler tape is reduced.

Description

Measuring tape

Technical Field

The invention relates to the technical field of measuring tools, in particular to a measuring tape.

Background

Chinese patent with publication number CN203981048U and

application date

2014, 4 and 3 discloses a steel tape measure capable of controlling high and low speed tape recovery, which comprises a tape measure shell, a tape measure belt, a tape measure spring and a large brake, wherein the large brake comprises a gate plate, a button, a friction head and a spring, three arc-shaped strip-shaped grooves are transversely arranged on the gate plate, the front of the gate plate is provided with the spring, and the spring is arranged in the friction head; an arc-shaped strip-shaped boss corresponding to the arc-shaped strip-shaped groove is arranged below the upper clamping plate of the ruler shell corresponding to the flashboard.

When the tape measure retracts, if the retraction speed is high, the button can be pushed forward slightly, so that the arc-shaped strip boss below the upper clamping plate of the tape measure shell is clamped in the arc-shaped strip groove in the middle of the flashboard, the friction head generates a slight squeezing effect on the retracting tape measure, and the flexible braking force generated along with the elastic deformation of the spring acts on the friction head, so that the rapidly-retracted tape measure can be rapidly decelerated.

Although the above-mentioned deceleration method can provide a certain effect, it is still necessary to decelerate manually, and the recovery operation is stopped when the user has a large force, which is inconvenient to use.

Disclosure of Invention

The invention aims to provide a measuring tape, which can achieve the effect of automatically controlling the speed when the measuring tape is retracted.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a tape measure, includes chi shell, reel and chi area, still includes the speed regulator, the speed regulator includes rotates the runner of being connected and provides the damping piece of rotational resistance for the runner with the reel, the damping piece is installed on the chi shell, be provided with between runner and reel and be used for supplying the unidirectional ratchet pawl mechanism who drives runner pivoted of reel, just the chi area drives the runner rotation when withdrawing.

According to the arrangement, when the tape is pulled out, the tape drives the winding drum to rotate, the ratchet wheel and pawl assembly is in an unmeshed state, the rotating wheel cannot be driven to rotate under the interference of the damping piece, and the tape can be normally used and is very easy to pull out; when the ruler tape is withdrawn, the winding drum is driven by the elastic force of the coil spring to rotate reversely to drive the ruler tape to withdraw, at the moment, under the action of the ratchet wheel and pawl mechanism, the winding drum drives the rotating wheel to rotate, and the rotating wheel can reduce the rotating speed of the rotating wheel and the winding drum under the damping of the damping piece, so that the withdrawing speed of the ruler tape is reduced.

More preferably: the ratchet wheel and pawl mechanism comprises a ratchet wheel fixed on the winding drum and a pawl arranged on the rotating wheel, and the ratchet wheel, the rotating wheel and the winding drum are coaxially arranged.

So set up, realize that the one-way of runner is driven by the reel.

More preferably: the rotating wheel is provided with an installation groove, and a rotating rod for the rotating connection of the pawl is arranged on the installation groove; a torsion spring is sleeved between the pawl and the rotating rod.

So set up, through the setting of torsional spring and rotation connection, make the pawl have the trend of rotating to the runner outside.

More preferably: and the mounting groove and the pawl are respectively provided with a jack for inserting the torsion arm of the torsion spring.

So set up, establish the dwang with the cover of torsional spring on to during a torque arm of torsional spring inserts the jack on the mounting groove, then on looking into the dwang with the pawl, with another torque arm insert the jack on the pawl can, simple structure, installation are very convenient.

More preferably: 1-6 clamping teeth are arranged on the ratchet wheel; the number of the pawls on the rotating wheel is 1-4.

So set up less pawl and latch, when reducing the ratchet pawl and not meshing, the reel rotates the resistance that receives, makes the chi area pull-out resistance littleer, and more smooth and easy.

More preferably: the damping piece comprises a mounting ring fixed on the ruler shell, an elastic resistance piece arranged on the inner side of the mounting ring and a damping protrusion arranged on the outer side wall of the rotating wheel, the rotating wheel is sleeved between the mounting ring and the ratchet wheel, and the damping protrusion is matched with the elastic resistance piece.

So set up, when the runner rotates, the damping arch rotates along with it and contacts with the elastic resistance piece in the rotation process thereby provides resistance and hinders the runner rotation.

More preferably: the elastic resistance piece comprises an elastic piece and a damping ball, and a mounting hole for mounting the elastic piece and the damping ball is formed in the inner side wall of the mounting ring.

So set up, when the damping is protruding to be contacted with the damping ball, the damping is protruding to promote the damping ball compression elastic component to shrink in the mounting hole, consumes the kinetic energy of runner in this process to reduce its rotational speed.

More preferably: the number of the damping bulges is 1-4, the number of the elastic resistance pieces is multiple, and all the elastic resistance pieces are adjacently arranged on the inner side of the mounting ring.

So set up, form the resistance of discontinuous for the chi area can have faster recovery speed, and can not appear when withdrawing because the problem that the resistance stopped.

More preferably: the ruler shell is formed by assembling a shell and a ruler cover, and the mounting ring is fixed on the ruler cover.

By the arrangement, the whole tape measure is very convenient to mount.

More preferably: the runner clamp is located between chi lid and the reel, be provided with spacing bulge loop on the runner, be provided with the spacing concave ring with spacing bulge loop complex on the reel.

So set up, keep that the runner can be good with the reel between coaxial rotation.

In summary, the tape measure of the present invention provides automatic speed control when the tape is retracted.

Drawings

FIG. 1 is a schematic structural view of the present embodiment, showing the configuration of the exterior of the tape measure;

FIG. 2 is a first schematic diagram of an explosive structure according to the present embodiment;

FIG. 3 is a second schematic diagram of the explosion structure of the present embodiment;

FIG. 4 is a schematic view of the governor in this embodiment;

FIG. 5 is a schematic structural view of the rotary wheel in the present embodiment;

FIG. 6 is a schematic view showing the structure of the ruler cover in the present embodiment;

FIG. 7 is a schematic structural view of the rotary wheel in the present embodiment;

fig. 8 is a schematic structural view of the roll in the present embodiment.

In the figure, 1, a ruler shell; 11. a housing; 111. installing a shaft; 12. a ruler cover; 121. an annular projection; 2. a tape; 3. a reel; 31. a coil spring; 32. a limit concave ring; 4. a rotating wheel; 41. mounting grooves; 42. a jack; 43. rotating the rod; 44. a torsion spring; 441. a torque arm; 45. a limit convex ring; 5. a damping member; 51. a mounting ring; 511. mounting holes; 52. an elastic resistance member; 521. an elastic member; 522. a damping ball; 6. a ratchet-pawl mechanism; 61. a ratchet wheel; 611. clamping teeth; 62. a pawl; 7. a damping projection.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

A tape measure, as shown in fig. 1 and 2, comprises a tape case 1, a winding drum 3, a tape 2 and a speed regulator, wherein the winding drum 3, the tape 2 and the speed regulator are all arranged in the tape case 1, and one end of the tape 2 extends out of the tape case 1.

The ruler shell 1 comprises a shell 11 and a ruler cover 12, wherein a cavity is arranged on the shell 11 and used for installing the winding drum 3, the ruler tape 2 and the speed regulator, and the ruler cover 12 is arranged on the shell 11 and used for sealing an opening of the cavity.

Referring to fig. 3, a mounting shaft 111 is provided on the housing 11, a limit protrusion ring 45 is provided at a corresponding position of the tape cover 12, and after the tape cover 12 is mounted on the housing 11, an end of the mounting shaft 111 is inserted into a circular hole in the middle of the limit protrusion.

The tape 2 is wound on the reel 3, a coil spring 31 is arranged on the inner side of the reel 3, a through hole is arranged on the axis of the reel 3, and a mounting shaft 111 passes through the through hole to rotatably connect the tape 2, the reel 3 and the coil spring 31 in the tape shell 1.

As shown in fig. 4, the governor includes a runner 4 and a damping member 5.

Wherein, the rotating wheel 4 and the winding drum 3 are coaxially arranged and are connected through a ratchet wheel and pawl mechanism 6. With reference to fig. 5 and 6, the ratchet-pawl mechanism 6 comprises a ratchet wheel 61 and a pawl 62, the ratchet wheel 61 is coaxially arranged with the winding drum 3 and fixed on the winding

drum

3, 4 obliquely arranged latch teeth 611 are arranged on the ratchet wheel 61, and four latches are arranged at equal intervals.

As shown in fig. 6, two mounting grooves 41 are provided in the runner 4, and the mounting grooves 41 penetrate through one end surface and the inner side wall of the runner 4. The mounting grooves 41 are distributed at equal intervals around the axial center line of the rotary wheel 4, and the rotary rod 43 is provided in the mounting groove 41 along the axial center line direction.

Referring to fig. 4 and 6, the pawls 62 are provided in two, and are respectively installed in the two installation grooves 41 by being inserted on the rotation lever 43. A torsion spring 44 is directly sleeved on the pawl 62 and the rotating rod 43, a jack 42 is arranged on each of the pawl 62 and the mounting groove 41 for inserting a torsion arm 441 of the torsion spring 44, and the pawl 62 is provided with a tendency of rotating towards the outside of the mounting groove 41 through the elastic force provided by the torsion spring 44.

Wherein, the number of the latch 611 can be set to 1-6, the number of the pawl 62 can be set to 1-4, and the specific number can be selected according to the actual use condition, so as to ensure the smooth drawing process of the tape 2 during the actual use without large resistance and noise.

As shown in fig. 6 and 7, the damping member 5 includes a mounting ring 51, an elastic resistance member 52 and a damping protrusion 7, the mounting ring 51 is fixed on the inner wall of the ruler cover 12, the mounting ring 51 is coaxially arranged with the annular protrusion 121, and the damping protrusion 7 is arranged on the outer side wall of the wheel 4.

As shown in FIG. 4, the wheel 4 is sleeved between the mounting ring 51 and the ratchet wheel 61, and the elastic resistance element 52 is mounted on the inner side wall of the mounting ring 51 and is used in cooperation with the damping protrusion 7. As shown in fig. 7, the elastic member 521 of the elastic resistance member 52 and the damping ball 522 are provided with a mounting hole 511 for mounting the elastic member 521 and the damping ball 522 on the inner side wall of the mounting ring 51, wherein the elastic member 521 is a spring, and the damping ball 522 is a plastic ball coated with rubber to reduce the impact noise.

Wherein the elastic resistance elements 52 are provided in two and adjacent positions (the elastic elements can also be provided in only one, or in three, four or even more, depending on the desired retraction speed of the blade 2).

Referring to fig. 8, a limit protruding ring 45 is disposed on one end surface of the runner 4, and the limit protruding ring 45 and the mounting groove 41 are disposed on two end surfaces of the runner 4, respectively. As shown in fig. 5, a concave limiting ring 32 is disposed on an end surface of one end of the drum 3, after the ruler cover 12 and the housing 11 are mounted, the two ends of the rotating wheel 4 are abutted against the ruler cover 12 and the drum 3, respectively, so that the rotating wheel 4 is clamped between the ruler cover 12 and the drum 3, and at this time, the convex limiting ring 45 is clamped in the concave limiting ring 32, so that the rotating wheel 4 can keep coaxial with the ratchet wheel 61 without eccentric rotation.

According to the working principle, when the tape 2 is pulled out, the tape 2 drives the winding drum 3 to rotate, the ratchet wheel 61 and the pawl 62 are in an unmeshed state, the rotating wheel 4 cannot be driven to rotate under the interference of the damping piece 5, and the tape 2 can be normally used and is very easy to pull out.

When the measuring tape 2 is withdrawn, the drum 3 reversely rotates under the action of the elastic force of the coil spring 31 to drive the measuring tape 2 to withdraw, in the process, the ratchet wheel 61 on the drum 3 is meshed with the pawl 62 on the rotating wheel 4, therefore, the drum 3 can drive the rotating wheel 4 to rotate, in the rotating process of the rotating wheel 4, the damping bulge 7 on the outer side wall of the rotating wheel 4 can rotate along with the rotating wheel 4, when the rotating wheel 4 rotates for one circle, namely the damping bulge 7 walks for one circle, the damping bulge 7 can be contacted with the elastic resistance element 52, part of kinetic energy of the damping bulge 7 is consumed in the contact process, the damping bulge is used for overcoming the elastic element 521 on the elastic resistance element 52 to enable the damping ball 522 to contract and move, and the rotating speed of the rotating wheel 4 is reduced along with the consumption of the kinetic energy, so that the recovery speed of the measuring tape 2 is reduced, and the recovery speed of the measuring.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the present invention.

Claims

1. A tape measure, including chi shell (1), reel (3) and chi area (2), characterized by: the ruler belt is characterized by further comprising a speed regulator, the speed regulator comprises a rotating wheel (4) rotatably connected with the winding drum (3) and a damping piece (5) providing rotating resistance for the rotating wheel (4), the damping piece (5) is installed on the ruler shell (1), a ratchet and pawl mechanism (6) for enabling the winding drum (3) to drive the rotating wheel (4) to rotate in a one-way mode is arranged between the rotating wheel (4) and the winding drum (3), and the winding drum (3) drives the rotating wheel (4) to rotate when the ruler belt (2) is retracted;

the damping piece (5) comprises a mounting ring (51) fixed on the ruler shell (1), an elastic resistance piece (52) arranged on the inner side of the mounting ring (51) and a damping bulge (7) arranged on the outer side wall of the rotating wheel (4), the rotating wheel (4) is sleeved between the mounting ring (51) and the ratchet wheel (61), and the damping bulge (7) is matched with the elastic resistance piece (52);

ratchet pawl mechanism (6) are including being fixed in ratchet (61) on reel (3) and locating pawl (62) on runner (4), ratchet (61), runner (4) and reel (3) set up with the axle center.

2. The tape measure of claim 1, wherein: the rotating wheel (4) is provided with a mounting groove (41), and a rotating rod (43) for the pawl (62) to be rotatably connected is arranged on the mounting groove (41); a torsion spring (44) is sleeved between the pawl (62) and the rotating rod (43).

3. The tape measure of claim 2, wherein: the mounting groove (41) and the pawl (62) are respectively provided with an insertion hole (42) for inserting a torsion arm (441) of the torsion spring (44).

4. A tape measure according to claim 1, 2 or 3, wherein: 1-6 clamping teeth are arranged on the ratchet wheel (61); the number of the pawls (62) on the rotating wheel (4) is 1-4.

5. The tape measure of claim 1, wherein: the elastic resistance piece (52) comprises an elastic piece (521) and a damping ball (522), and a mounting hole (511) for mounting the elastic piece (521) and the damping ball (522) is formed in the inner side wall of the mounting ring (51).

6. The tape measure of claim 5, wherein: the number of the damping bulges (7) is 1-4, the number of the elastic resistance pieces (52) is multiple, and all the elastic resistance pieces (52) are adjacently arranged on the inner side of the mounting ring (51).

7. The tape measure of claim 1, wherein: the ruler shell (1) is provided with a ruler cover (12), and the mounting ring (51) is fixed on the ruler cover (12).

8. The tape measure of claim 7, wherein: the rotating wheel (4) is provided with a limiting convex ring (45), and the winding drum (3) is provided with a limiting concave ring (32) matched with the limiting convex ring (45).