CN201285261Y - Measuring tape - Google Patents

Abstract

The utility model discloses a tape measure, include the chi box that is formed by upper cover and lower cover lock of each other, the chi area in the chi box, bottle lid form runner, the clockwork spring, bottle lid form runner is installed in the chi box through the dabber at lower cover center, the chi area winding is in bottle lid form runner outer fringe, its end is fixed on bottle lid form runner, the clockwork spring is coiled and the holding is in the recess of bottle lid form runner, its inner end is fixed at the dabber at lower cover center, its outer end is fixed in bottle lid form runner outer fringe, be equipped with the arc wall that the platformis is distributed on the outer terminal surface of bottle lid form runner, the inner of arc wall is a backstop portion, the outer end of arc wall with the arc wall link up mutually, correspondingly, the inboard of upper cover is equipped with a recess, establish in the recess one with the arc wall complex and can stop the recess wobbling claw. The utility model discloses reduce the damage to the tape measure area, prolonged the life-span of tape measure.

Description

tape measure

technical field

The utility model relates to a tape measure, in particular to a tape measure capable of automatic positioning.

Background technique

The tape measure has been widely used because it is easy to carry, and has automatic retraction and positioning functions. In the prior art, there is a tape measure that uses a torsion spring as the power to shrink the tape, and a brake block controlled by a button and the tape. The static friction between them is used as the driving force for automatic positioning. The disadvantage of this method is that the static friction between the brake block and the tape will cause damage to the tape and reduce the service life of the tape.

Utility model content

The purpose of the utility model is to provide a tape measure which adopts the cooperation between the rotating wheel and the ruler box to provide the braking force of the ruler tape.

The technical scheme provided by the utility model is as follows: a tape measure is constructed, including a ruler box formed by interlocking an upper cover and a lower cover, a ruler tape in the ruler box, and a bottle cap-shaped runner and a spring. The center of the bottle-cap-shaped runner is provided with a round hole, and the bottle-cap-shaped runner is installed in the ruler box through the mandrel in the center of the lower cover. The ruler tape is wound on the outer edge of the bottle-cap-shaped runner, and its end is Fixed on the bottle cap-shaped runner, the spring is wound into a roll and accommodated in the groove of the bottle cap-shaped runner, its inner end is fixed on the mandrel in the center of the lower cover, and its outer end is fixed on the bottle The outer edge of the cap-shaped runner is provided with an arc-shaped groove distributed in a roll shape on the outer end surface of the bottle-cap-shaped runner. The inner end of the arc-shaped groove is a stopper, and the arc-shaped groove The outer end communicates with the arc-shaped groove. Correspondingly, a groove is provided on the inner side of the upper cover, and a pawl that is matched with the arc-shaped groove and can swing in the groove is arranged in the groove. .

The first, second, and third notches are sequentially provided on a section of 180° arc of the side wall of the bottle cap-shaped runner, and the outer end of the clockwork spring is stuck on the first notch and passed through the second notch. into the groove of the runner; an arc-shaped boss is arranged on the inner side of another 180° arc of the side wall of the bottle-cap-shaped runner, and the inner end of the tape is bonded to the arc-shaped boss Between the side wall of the bottle-cap-shaped runner and through the third gap, it is wound around the outer edge of the bottle-cap-shaped runner.

The utility model has the following advantages: since an arc-shaped groove is arranged on the runner, and a swingable pawl is arranged in the groove inside the upper cover, it replaces the static friction between the brake block and the tape to realize braking. The moving method reduces the damage to the tape and prolongs the life of the tape.

Description of drawings

Fig. 1 is the structural exploded view of tape measure of the present utility model;

Fig. 2 is a structural representation of the utility model tape measure lower cover;

Fig. 3 is the structural representation of the tape measure loam cake of the present utility model;

Fig. 4 is the structural representation of the measuring tape runner of the present utility model;

Fig. 5 is another schematic structural view of the tape measure runner of the present invention

Detailed ways

With reference to Fig. 1, provide a kind of tape measure, comprise the ruler box that is formed by interlocking with upper cover 11 and lower cover 12, the ruler tape (not shown in the figure) in the ruler box, also comprise bottle cap shape runner 3, Clockwork (not shown in the figure).

Referring to Fig. 1, Fig. 2 and Fig. 3, a round hole is provided in the center of the bottle cap-shaped runner 3, and is installed in the ruler box through the mandrel 121 at the center of the lower cover 12, and the ruler tape is wound around the outer edge of the bottle cap-shaped runner 3 , its end is fixed on the bottle cap-shaped runner 3, the spring is wound into a roll and accommodated in the groove 31 of the bottle cap-shaped runner 3, and its inner end is fixed on the mandrel 121 at the center of the lower cover 12, Its outer end is fixed on the outer edge of the bottle cap-shaped runner 3, and the outer end surface 32 of the bottle cap-shaped runner 3 is provided with an arc-shaped groove 33 distributed in a roll shape, and the inner end of the arc-shaped groove 33 is a stopper part 331, the outer end of the arc-shaped groove 33 communicates with the arc-shaped groove 33, correspondingly, the inner side of the upper cover 11 is provided with a groove 111, and a groove 111 is provided in the groove 111 to cooperate with the arc-shaped groove 33 and can be placed in the groove. The pawl 112 that swings in 111.

With reference to Fig. 1, Fig. 4, Fig. 5, the first, second, and third gaps are successively arranged on a section of 180° arc of the side wall of the bottle cap-shaped runner 3, and the outer end of the mainspring is stuck in the first On the notch 34 and enter the groove 31 of the runner 3 from the second notch 35; another section of the 180° arc inboard of the bottle cap-shaped runner 3 sidewall is provided with a section of arc-shaped boss 37, and the inner end of the ruler tape is Bonded between the arc-shaped boss 37 and the side wall of the bottle cap-shaped runner 3, and wound around the outer edge of the bottle cap-shaped runner 3 through the first gap 36.

When the tape is pulled out, the cap-shaped runner 3 rotates counterclockwise, and the spring in the bottle-cap-shaped runner 3 is also driven and accumulates elastic potential energy. The pawl 112 moves in the arc groove 33 without Under resistance, when the tape is pulled out to the required length and needs to be positioned, you can let go, the bottle cap-shaped runner 3 rotates clockwise under the drive of the spring, and the pawl 112 swings to the other side in the groove 111 , and move in the arc groove 33, when it moves to the stopper 331, it is braked by resistance, and the tape is blocked. When it is necessary to retract all the tapes, the tape can be pulled forward, and the pawl 112 swings to the other side in the groove 111, and moves without resistance in the arc groove 33 under the drive of the mainspring, and the tape is promptly drawn. take back.

Claims (2)

1. A measuring tape comprising a chi box formed by interlocking an upper cover (11) and a lower cover (12), a chi tape in the chi box, characterized in that it also includes a bottle cap-shaped runner (3), Spring, the center of the bottle cap-shaped runner (3) is provided with a round hole, and is installed in the ruler box through the mandrel (121) in the center of the lower cover (12), and the ruler tape is wound around the bottle cap-shaped runner (3) outer edge, its end is fixed on the bottle-cap-shaped runner (3), and the spring is wound into a roll and accommodated in the groove (31) of the bottle-cap-shaped runner (3), its The inner end is fixed on the mandrel (121) at the center of the lower cover (12), and its outer end is fixed on the outer edge of the bottle cap-shaped runner (3). ) is provided with an arc-shaped groove (33) distributed in a roll shape, the inner end of the arc-shaped groove (33) is a stopper (331), and the outer end of the arc-shaped groove (33) is connected to the The arc-shaped grooves (33) are connected, and correspondingly, the inner side of the upper cover (11) is provided with a groove (111), and a groove (111) is provided in the groove (111) to cooperate with the arc-shaped groove (33) and can A pawl (112) that swings in said groove (111). 2. The tape measure according to claim 1, characterized in that a first, second and third gaps are sequentially provided on a section of a 180° arc of the side wall of the bottle cap-shaped runner (3), The outer end of the mainspring is stuck on the first notch (34) and enters the groove (31) of the runner (3) from the second notch (35); on the side of the bottle cap-shaped runner (3) The inner side of another section of 180° arc of the wall is provided with a section of arc-shaped boss (37), and the inner end of the tape is bonded between the arc-shaped boss (37) and the bottle cap-shaped runner (3). Between the sidewalls, and by the third gap (36) wrapped around the outer edge of the bottle cap-shaped runner (3).

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