The present invention relates to the door lock body structure, especially the lock body structure of the silent structure.
At present, the commonly used door locks are made of metal. When opening or closing the door lock, the collision noise among the metal components generates. The handle part and the drive part are the parts generating collision noise easily. In order to reduce such noise, the inventor explores many solutions. CN202417010U discloses a handle—panel mechanism, including the handle and panel. The handle penetrates the mounting hole on the panel, and matches a square core. A mosaic damper and a fixing plate are arranged behind the panel. The rotating part of the mosaic damper is arranged with a square hole, which matches the square core; there are at least two screw holes on the fixing plate, which are connected with the panel, so as to fix the mosaic damper in the panel. The handle is used conveniently and opened smoothly. Through the mosaic damper, the handle resetting can be easily controlled, and the resetting can be slowed down. This is not only safe and reliable, but also can reduce vibration among parts and relieve impact among parts, so as to avoid the generation of noise. However, the square core is used in the scheme to transfer the torque among the three parts: the handle, the damper and the lock body. There will be phantom at the joint between the square core and these three parts, so as to generate noise easily. In addition, the internal structure of the handle will cause collision, and the drive popping out instantly is also one of the main factors causing large collision sound. In order to reduce such collision sound, CN103899145A discloses a scheme to arrange the damper at the rear end of the drive to slow down the popping speed of the drive; CN104153647A discloses the scheme to arrange an O ring on the drive lever to slow down the access speed of the drive. The above two inventions slow down the access speed of the drive to the box base component to a certain degree. However, the scheme disclosed in CN103899145A shall be arranged with the specific damping rod with complicated structures, and the adaptability with the standard lock is poor; the scheme disclosed in CN104153647A has better adaptability, however, buffer is realized by means of elasticity of the O ring. After aging or fatigue of the O ring, the expansion of the drive will be largely influenced, or even be stuck. Therefore, the structure performance is unstable.
Based on the above analysis of the prior arts, there are defects existing in the current silent door locks on the structure of the handle and drive with satisfying silence effect.
The goal of the invention is to improve the defects as occurred in prior product, to reduce virtual displacement among the transmission components, to enhance reliability and adaptability of the drive buffer, and to provide a silent door lock. The technical solution as claimed in the invention is to provide a silent door lock, comprising a panel, a lining plate component, a box base component, a handle pick, a buffer handle and a buffer drive, wherein a handle mounting hole is arranged in the panel, a limiting column is arranged above the handle mounting hole, a silencer sleeve is fit on the limiting column, and a damper fixing column is arranged at a side of the handle mounting hole; a drive hole is set on the lining panel to let the drive in and out; a drive lever fixing frame is arranged in a center portion of the box base component, a guiding groove is arranged at one side of the drive lever fixing frame, and a silencing retainer sleeve embedding groove is arranged at the other side thereof; and an end of the handling pick is arranged with a toggling piece.
The buffer handle includes a handle, a volute spring, a toggling plate and a damper; the handle penetrates the handle mounting hole on the panel, is inserted into the volute spring, toggling plate and the damper in turn, and is clamped and fixed with an elastic retaining ring; in order to reduce the friction between the rotating toggling plate and adjacent parts, there is a pad set at each side of the toggling plate; a square core hole is arranged at the center of the handle rotation axle, and two embedding grooves are arranged at sides thereof, one end of the volute spring is clipped into the embedding groove and the other end thereof is fixed on the limiting column; a toggling caulking hole is arranged in the center of the toggling plate, and a toggling caulking tenon is protrudingly arranged at both sides of the toggling caulking hole, a damping caulking hole is arranged in the center of the damper, and a damping block tenon is protrudingly arranged at both sides of the damping caulking hole, the toggling caulking hole and the damping caulking hole being fit on the handle rotation axle, and the toggling caulking tenon and damping block tenons being clipped into the embedding grooves at the sides of the handle rotation axle. A screw is adopted respectively at both ends of the damper to fix the damper with the damper fixing column on the panel. The square core is inserted into the square core hole, so that handle torque is transferred to the handle pick to open the door lock. During the opening process, when the handle is pressed for unlocking, it is necessary to overcome the torque of the volute spiral spring firstly, and enhance the hand feeling for opening; after the hand loosens grip, the elastic volute spiral torque of the volute spiral spring drives the handle for returning rapidly. At the moment, the damper generates the buffer resistance to the elastic volute spiral torque, slows down the handle returning speed, and thus reduces the sound generated when the toggling piece collides the limiting column. Compared with the prior art, the sophisticated design of the invention is that the damper and the volute spiral spring are fixed on the handle rotation axle, the damping force and elastic volute spiral torque are applied on the handle axle in the opposite directions, which can eliminate the connection virtual displacement among the handle and damper and the toggling plate, so as to further avoid the generation of the noise at the handle position.
The buffer drive includes a drive, a drive return spring, a silencing retainer sleeve, a drive guide piece and a drive lever; the silencing retainer sleeve consists of a silencing retainer sleeve front cover, two O rings and a silencing retainer sleeve rear cover; both sides of the front cover of the silencing retainer sleeve are arranged with the block tenon, which is inserted into the embedding groove of the silencing retainer sleeve in the box base component, which can fix the silencing retainer sleeve in the box base component; the damping chamber is arranged at the center of the front cover of the silencing retainer sleeve, an appropriate amount of damping grease is filled into the damping chamber, and both O rings block the damping grease into the damping chamber; the buckling tenons are arranged at both sides of the rear cover of the silencing retainer sleeve for buckling of the rear cover of the silencing retainer sleeve and front cover of the silencing retainer sleeve; the drive lever is arranged at a rear end of the drive, a center portion of the drive lever is clipped into the drive lever fixing frame, and the drive return spring, the silencing retainer sleeve and the drive guide piece are penetrated by and arranged on the drive lever. The drive lever is inserted through the silencing retainer sleeve; and an end of the handling pick is arranged with a toggling piece, rotation of which can drive backward translational motion of the drive guide piece. At the free state, rotate the handling pick to rotate the toggling piece. It drives the drive guide vane for backward translational motion, until the drive end surface is flush with the lining board assembly to reach the purpose of unlocking; when the drive end surface is flush with the lining board assembly, the drive is translated forward under applied force of the return spring, so that the drive is recovered to the free state. During movement of the drive lever, the damping grease in the silencing retainer sleeve is blocked, which can slow down the motion speed of the drive lever, so as to act as the cushion of the drive to the box base component, and slow down impact of the drive on the lining board assembly. The above buffer drive further reduces collision sound among door lock parts. Moreover, the silencing retainer sleeve is provided with exquisite structure and strong adaptability. The cushion function is mainly realized by the closed damping grease, and the performance is quite stable.
The invention reliably realizes the mute effects through above embodiments.
The invention can be implemented through the following embodiments:
As shown in
As shown in
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As shown in
At the free state (please refer to
According to
Through the above technical solution, the buffer drive 6 further reduces collision sound among door lock parts. Moreover, the silencing retainer sleeve 63 is provided with exquisite structure and strong adaptability. The buffering function is mainly realized by the closed damping grease 63120, and the performance is quite stable.
In summary, the invention reliably realizes the silence effects through above technical solution.
The silent lock of present invention has exquisite structure, strong adaptability, stable buffer performance, and can reduce the phantom among the transmission components effectively reduces the collision sound among the lock parts, so as to reliably achieve the silencing effect, and is suitable for various industrial and home use.
Number | Date | Country | Kind |
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201510146757.6 | Mar 2015 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2016/073132 | 2/2/2016 | WO | 00 |