Movable lock catch and handheld circular saw

A technology of movable locks and circular saws, which is applied in the direction of portable motorized devices and manufacturing tools, can solve the problems of limited anti-recoil effect, low reliability of anti-recoil mechanism, and inflexible and convenient configuration of anti-recoil lock blocks, etc. To achieve the effect of flexible and quick installation
CN103406883AActive Publication Date: 2013-11-27SUMEC HARDWARE & TOOLS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUMEC HARDWARE & TOOLS
Publication Date
2013-11-27

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Abstract

The invention provides a movable lock catch and a handheld circular saw with the same. The movable lock catch comprises a locking piece seat, a rotating shaft and a connecting fastener, a via hole capable of allowing a rotating shaft to pass through is formed in the locking piece seat, one end of the rotating shaft penetrates the locking piece seat to be connected with a knob and rotates with the knob, the other end of the rotating shaft is provided with a square-head locking piece with a square head, the square head rotates with the rotating shaft to the inside of the locking piece seat or extend out of the locking piece seat when the rotating shaft rotates, and the locking piece seat is fixed on a to-be-locked device by the connecting fastener. The movable lock catch cuts forward together with the circular saw along a guide rail; when the movable lock catch is at an open position, the circular saw is allowed to move along a cutting direction of the guide rail and is prevented from leaving the guide rail to move towards a direction of a user; when backlash happens, the circular saw is limited on the guide rail by the movable lock catch. The handheld circular saw is safer and more reliable to operate.
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Description

technical field

[0001] The invention relates to a movable lock used for a hand-held circular saw, and the movable lock is especially suitable for a circular saw with a plunge-type cutting action. Background technique

[0002] For hand-held circular saws with plunge feed, when the rotating saw blade cuts into the workpiece, it will generate a recoil, and the resulting recoil force will cause the circular saw to leave the guide rail and fly towards the user. In order to prevent the circular saw from leaving the guide rail and moving towards the user, an anti-recoil mechanism is usually used. When the recoil occurs, the anti-recoil mechanism will limit the circular saw to the guide rail, making the operation of the hand-held circular saw safer and easier. reliable. However, the reliability of the existing anti-recoil mechanism is not high, and the anti-recoil effect is limited. For example, the anti-recoil lock block adopted in the European patent EP1418018B1 limits the anti-r...

Claims

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