74results about How to "Achieve mute effect" patented technology

The invention discloses an electric drive impact tool. The main technical feature includes: electromagnetic coil connecting to impulse power supply is set in the case; impact bar passing through the cavity of electromagnetic coil; iron core section, which is located at the opening part moving toward after the impact bar having magnetic force, is set in the impact bar; under free state, the first elastic component and the second elastic component constraining the impact bar on the certain original location. The linear movement of impact bar could be generated by magnetic force. Thus, it is quiet, and reliable, and the volume is sharply decreased. It could be widely used in the fields of carving, magnetism carving, hammering, etc.

The invention relates to a two-way wrench comprising a wrench body, a wrench head sleeve, a needle bearing, a wrench head block sleeving a nut and a clamp spring. A through hole is formed in the middle of the wrench head sleeve. A protruding edge is formed at one end of the inner wall of the through hole. A first slot in circle is formed in the center of the inside wall of the protruding edge. The joint of the wrench head sleeve and the wrench body is provided with a rotary knob. A shifting rod is fixed at the lower end of the rotary knob and penetrates the side wall of the wrench head sleeve. The needle bearing comprises a needle sleeve and needles uniformly embedded in the side wall of the needle sleeve. A notch is formed in the outside wall of the needle sleeve. The needle bearing is embedded in the wrench head sleeve. One end of the needle bearing is abutted against the protruded edge. The shifting rod extends in the notch. One end of the outside wall of the wrench head block is provided with a third slot. The wrench head block is embedded in the needle bearing. The axial positions of the wrench head block and the wrench head sleeve are fixed with the aid of the clamp spring mounted in the second slot and the third slot. The two-way wrench is wide in range of application.

The invention relates to a hardware door lock fitting, and discloses a magnetic silent lock body. The magnetic silent lock body is provided with a box bottom assembly, a driving assembly, a deadbolt assembly, a buckling box assembly and a handle stirrer, wherein the driving assembly consists of a slide block, a gear and a three-circle torsion spring; the deadbolt assembly consists of a deadbolt, a deadbolt pull rod and a reset spring; the top of the deadbolt is provided with a rack B; the box bottom assembly is provided with a gear positioning column; the slide block is provided with a rack A and a magnet positioning hole; the deadbolt is provided with a rack B; a magnet B is arranged in the buckling box assembly; the magnet A is fixedly embedded into the magnet positioning hole in the slide block; the slide block is arranged in the box bottom assembly; the gear passes through the gear positioning column, and is meshed with the rack A and the rack B simultaneously. During door closing, the deadbolt extends outwards under the same-pole repellant force of the magnet A and the magnet B. The movement of the lock body is driven by the gear and the racks, and the overall movement process is stable and reliable without collision, so that the use handfeel of the lock body is improved, and a silencing effect is achieved.

The invention discloses a flat plate loop heat pipe-based closed chassis cooling system capable of achieving closed design of a cooling chassis on the basis of solving the cooling problem of a high-power component. The closed chassis cooling system comprises a closed chassis, radiating fins arranged outside a closed chassis, and more than one set of flat plate loop heat pipes arranged in the closed chassis, wherein an evaporator of each flat plate loop heat pipe is clung to a to-be-cooled device in the closed chassis; the closed chassis comprises a movable side plate, a chassis frame and a cooling side plate; one end of the chassis frame is closed through the movable side plate and the other end is closed through the cooling side plate; and the radiating fins and condensers of the flat plate loop heat pipes are integrated on the cooling side plate. According to the cooling system, heat is transmitted to the outside of the chassis for discharging through the flat plate loop heat pipes, the closed design of the chassis is achieved, dustproof and dampproof effects of the chassis are achieved, the service life of corresponding equipment can be prolonged, and the reliability and the adaptability on complicated and harsh operating environments can be improved.

The invention relates to a refrigeration system for a frost-free refrigerator, comprising a refrigeration system arranged with a refrigeration evaporator; a freezing system composed of a fin evaporator and a freezing evaporator that are connected in parallel; a switching device for switching between the fin evaporator and the freezing evaporator in the freezing system and realizing independent turning-on/off of the freezing system and the refrigeration system; a master control board for controlling the switching device, wherein the refrigeration system is connected with the freezing system in parallel and then connected with a compressor and a condenser to form a closed refrigerating loop. The refrigeration system combines the advantages of wind cooling system and direct cooling system, and has the advantages of high operating efficiency, rapid temperature drop, low energy consumption, saving energy and good food refrigeration and fresh-keeping effects.

The present invention relates to a removing system and method for hornet nests. The system comprises an airborne processor module, a drone with an oil spraying device, and an image acquisition moduleelectrically connected to the airborne processor module, wherein the airborne processor module is suitable to control flight of the drone, and when the image acquisition module takes a photograph of atarget object, the airborne processor module is suitable to control the oil spraying device to spray oil to the target object. According to the system and method provided by the present invention, the hornet nests are found by the image acquisition module, and the function of controlling the drone to clean the hornet nests is realized.

The invention discloses a heavy front-brake braking caster, which comprises a caster, a caster seat, a braking pedal, a braking connecting rod, a braking arm plate, a braking adjusting nail and a braking pressing plate, wherein the upper part of the caster seat is fixedly connected with the bottom of equipment, and the lower part of the caster seat is fixedly connected with the center shaft of the caster. The heavy front-brake braking caster adopts flash-brake type braking, is flexible to operate and convenient to use, and can carry out flash-brake type braking before the equipment. The braking nail is adjusted so as to ensure the optimum distance between a braking point and the caster surface and keep a good braking effect. The heavy front-brake braking caster has a simple and compact structure, is additionally provided with an anti-shake noise-reducing torsional spring, effectively remits the technical problem that noises can be made due to shake and friction in the walking process of the caster as gaps exist among the braking parts of the traditional braking device, and achieves a mute effect. A bearing sleeve made of special materials is additionally arranged in a bearing ring, so that the noises are reduced and meanwhile 40 percent of load weight is increased, and the service life of the heavy front-brake braking caster is effectively prolonged.

The invention discloses a pull rod locking device which comprises a pull rod, a plurality of locking blocks and a first driving mechanism, wherein the plurality of locking blocks are circumferentially arrayed outside the pull rod around the center axis of the pull rod; the first driving mechanism is used for driving a plurality of locking blocks to move along the radial direction of the pull rod so as to lock or loosen the pull rod. A clamping mechanism comprises a plurality of pull rod locking devices and a second driving mechanism; the second driving mechanism comprises a driving unit, a gear wheel synchronously coupled to a rotating shaft of a motor, and a plurality of pinions meshed with the gear wheel; tooth disks meshed with the pinions are arranged on the outer surfaces of rotary tables. According to the invention, rapid and convenient locking and loosening of the pull rod are achieved; a plurality of pull rod locking devices synchronously lock or loosen, so that efficiency is improved, and cost is saved.

The invention relates to the field of diesel generators, in particular to a high heat dissipation and silencing diesel generator set. A shell of a multi-layer structure is arranged outside a power generator set body, a medium for outward transmission of noise is lost through a vacuum layer, a further silencing effect is achieved through multiple sound absorbing layers, one side face of the shell is provided with an air inlet, the air inlet is provided with a condensing coil of a fan, external air is blown into the shell through the fan, air passes through the condensing coil, on one hand, moisture in air is condensed before entering the shell, on the other hand, air is cooled, therefore, cold air is blown into the shell, the generator set is cooled, the problem that components of the generator set are corroded through moisture in air is avoided, a silencer is arranged on an exhaust pipe of an engine, noise is prevented from being transmitted out from the exhaust pipe, and by means of the structural improvement, the diesel generator set has the effects of high heat dissipation and silencing.

The invention discloses a mute circuit of a microphone on an earphone, and a method. The mute circuit comprises a toggle switch, a microphone arranged on an earphone and resistance to ground, wherein the first end of the toggle switch is grounded through the resistance to ground; the second end of the toggle switch is in signal connection with an audio signal MIC of an audio jack of the earphone; the third end of the toggle switch is connected to the first end of the microphone; the second end of the microphone is grounded; the second end of the toggle switch is the public end of the toggle switch; and thus, the audio signal MIC of the audio jack of the earphone and the resistance to ground are grounded when the first end and the second end of the toggle switch are connected. By means of the mute circuit of the microphone on the earphone, and the method disclosed by the invention, the mute function of the microphone can be realized stably.

The invention discloses a massager. The massager comprises a shell, a control device, a transmission mechanism and a massage head, wherein the shell is elongated and comprises an upper cover, a lower cover and a bottom end cap, wherein the upper cover and the lower cover are in clamped and screwed connection to form a cavity; the control device is positioned in the cavity and comprises a power PCB, a battery, a motor, a PCB mainboard and an anti-vibration pad; the battery is electrically connected with the power PCB; the PCB mainboard is electrically connected with the motor and the power PCB through a terminal of the PCB mainboard; the power PCB is in screwed connection with a stud of the bottom end cap and a stud of the lower cover; the anti-vibration pad is arranged on the periphery of the motor; the transmission mechanism comprises a shaft cover, a motor eccentric wheel, a rotating shaft, a transmission shaft and bearings; the motor eccentric wheel, the rotating shaft, the transmission shaft and the bearing are positioned in the shaft cover; the shaft cover is in screwed connection with a top end cap of the lower cover; the motor eccentric wheel is in sleeving connection with a motor shaft of the motor and the rotating shaft; the transmission shaft is in sleeving connection with the rotating shaft; the two bearings are respectively in sleeving connection with two ends of the transmission shaft; and the massage head is in sleeving connection with the transmission shaft. The massager can massage a person at small sound and is simple to assemble.

A mute power capacitor of the present invention comprises a shell, a core and a core encapsulating film which are arranged in the shell, outgoing line terminals fixed outside the shell, and core leading-out wires. The encapsulating film is wrapped on the exterior of the core and is composed of two layers of basement films, a netted skeleton layer clamped between the two layers of basement films and the plastic damping grease filled in the gaps between the two layers of basement films and the netted skeleton layer. By compositing the two layers of basement films and the plastic damping grease, a practical and convenient core external encapsulating structure is provided, so that the core can be fastened very well, a lead wire structure can be protected, the insulation between the core and the shell can be satisfied, and the structure characteristic and the effect of the mute power capacitor can be enhanced by the arrangement of the two layers of basement films, and the product technological process is simplified. By utilizing the plastic damping grease as the receptor, the operation noise of the power capacitor can be reduced effectively, thereby realizing a mute effect. Meanwhile, the damping grease is formed by compositing the special high-molecular materials of good electrical insulating property, so that the insulation effect is enhanced, and the suitable range and the voltage resistant grade of a product are improved.

The invention discloses a mute door lock. The mute door lock comprises a lock rack, a lock tongue bar connected with a lock tongue and a lock head linkage part which is in linkage with the lock tongue bar. A lock pull rope connected with the lock rack is disposed on the lock tongue bar and/or the lock head linkage part. According to the mute door lock, through reasonable structural improvement, especially the pull rope design, impact does not directly occur when the lock tongue returns or other parts are reset, and noise generated during locking and unlocking of the door lock is greatly lowered; besides, through the design that a contact block is in linkage with the lock tongue, the lock tongue is retracted in the door opened state and extends out when a door is closed in place, so that the impact sound generated when the lock tongue impacts on a door frame during door closing is avoided, and the noise of the door lock is further lowered; accordingly, the true mute effect is achieved.

The invention relates to a three-dimensional adjustable hidden hinge, and provides a three-dimensional adjustable hidden hinge structure. The three-dimensional adjustable hidden hinge structure comprises a movable seat fixed to a door leaf, a fixed seat fixed to a door frame and a hinge assembly. The movable seat comprises two movable seat cover plates, an outer seat of the movable seat, an innerseat of the movable seat and two adjusting plates. The adjusting plates are fixed to the inner seat of the movable seat, and the inner seat of the movable seat is fixed into the outer seat of the movable seat. The fixed seat comprises two fixed seat cover plates, an outer seat of the fixed seat and an inner seat of the fixed seat, and the inner seat of the fixed seat is fixed into the outer seat of the fixed seat. The hinge assembly comprises a fixed side swing arm, a concave swing arm, a convex swing arm, a movable side swing arm, a fixed side upper rotating shaft, a fixed side lower rotatingshaft, a fixed side swing arm rotating shaft, a center rotating shaft, a movable side swing arm rotating shaft, a movable side upper rotating shaft and a movable side lower rotating shaft.