2results about How to "Reduce impact sound" patented technology

The application discloses a mute door lock assembly and belongs to the technical field of locks. The mute door lock assembly comprises a lock body, a slanting lock tongue and a main lock column which are arranged on the lock body in an extendable mode, and a lock cylinder hole is formed in the lock body. The lock body comprises a lock body and a lock cover, the lock body and the lock cover are fixedly connected through screws, mounting holes are formed in the lock body and the lock cover, a mounting column is arranged between the lock body and the lock cover, screw holes are formed in the mounting column, the mounting column is opposite to the mounting holes, the screws are connected with the screw holes through the mounting holes, and the mounting of the lock body and the lock cover is realized. A mute structure is further arranged in the lock body. The mute door lock assembly has the beneficial effects that the first magnet and the second magnet are arranged, the second magnet generates a certain repulsive force on the first magnet when the first magnet moves to the limit position, the push plate is prevented from impacting the limiting structure, i.e., the lock body, and the impact sound is reduced.

The purpose of the present disclosure is to provide an impact rotary tool that can reduce impact sound. An impact rotary tool according to the present disclosure includes a motor (10), an output shaft (30), an impact mechanism (4), an inner cover unit (3), and a main body housing. The impact mechanism (4) is configured to apply an impact force to the output shaft (30) in response to rotation of the motor (10). The main body case accommodates the motor (10), the impact mechanism (4), and the inner cover unit (3). The impact mechanism (4) includes hammer members (40A, 40B) that strike impact receiving portions (32, 33) provided for the output shaft (30) in response to rotation of the motor (10). The inner cover unit (3) covers at least the impact mechanism (4).