Tape braking mechanism

Abstract

A tape measure damping mechanism comprises a push button, a pawl, a tape measure shell, a center tape measure shell, and a tap measure core tray and is characterized in that the periphery of the center tape measure shell is rotatably connected with the pawl which can move right and left by a pawl axis. A torsional spring is arranged between the pawl and the center tape measure shell. One end of the pawl is matched with ratchets which are molded on the side surface of the tape measure core tray and distributed in a toroidal way. The other end of the pawl is matched with the contradiction position of the push button arranged in a push button hole at the side surface of the shell body. A spring is arranged between the push button and the shell body nearby the push button. The tape measure damping mechanism realizes automatic braking function of the long tape measure; and the push button is light and flexible; the braking and locking is reliable and stable, and is difficult to be broken.

Description

technical field [0001] The invention relates to a tape measure braking mechanism. Background technique [0002] There are many ways to brake the tape. The brake of the short ruler (the length of the tape is less than 10M) generally uses the elastic deformation of the plastic to stop the tape, and also relies on the core to achieve the purpose of braking. However, these braking methods are generally They are all manual, but the long ruler (the length of the tape is more than 10M) does not realize the function of automatically recovering the tape by the spring force due to the length of the tape. Many long rulers can only be designed to swing back the tape by hand. Since the breakthrough of the company's automatic recycling of the long ruler technology, it has solved the problem that the long ruler cannot be automatically recycled, but at the same time it has also formed a new problem, that is, the long ruler automatically recovers the tape by the spring force, because the tap...

AI Technical Summary

Problems solved by technology

[0002] There are many ways to brake the tape. The brake of the short ruler (the length of the tape is less than 10M) generally uses the elastic deformation of the plastic to stop the tape, and also relies on the core to achieve the purpose of braking. However, these braking methods are generally They are all manual, but the long ruler (the length of the tape is more than 10M) does not realize the function of automatically recovering the tape by the spring force due to the length of the tape. Many long rulers can only be designed to swing back the tape by hand. Since the breakthrough of the company's automatic recycling of the long ruler technology, it has solved the problem that the long ruler cannot be automatically recycled, but at the same time it has also formed a new problem, that is, the long ruler automatically recovers the tape by the spring force, because the tape of the long ruler is generally in the More than 10M, so the elastic force of the spring is required to be large. If the braking method of a short ruler is still used, the same effect cannot be achieved. The patent number is: 02250914.3 discloses an automatic braking tape measure, which is characterized by: a ruler box, a rotating wheel , mainspring, tape, button, and reed, and the wheel and the button are geared. The clutch between the button and the wheel is controlled by the spring, so as to achieve the effect of automatic braking. Its structure is suitable for short rulers and wheels. On the mandrel, if this structure is used on a long ruler, due to the large spring force of the long ruler, the result is that the force acting on the button is also quite large, resulting in a large force on the button, which is easy to break and inconvenient to use. Therefore, it is necessary to have a better structure for the long ruler to achieve the automatic braking effect.

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