11results about How to "Reduce the sound" patented technology

The invention relates to the technical field of elevators, and discloses an elevator car interior protection structure based on multi-dimensional buffering, which comprises four groups of first splicing devices, two groups of second splicing plates and eight groups of third splicing plates, the first splicing devices comprise a plurality of groups of first splicing plates, and connecting grooves are formed in the front and rear sides of the plurality of groups of first splicing plates; a first hinge is arranged in a connecting groove of the first splicing plate, a plurality of sets of first connecting devices are connected between the second splicing plates and the third splicing plates, the first splicing devices, the two sets of second splicing plates, the eight sets of third splicing plates and the first connecting devices are matched with screw blocks, so that the device can be quickly assembled; and meanwhile, field processing is not needed, the upper side of the second splicing plate on the front side is movably connected with a turning plate, the device does not need to be fixed to the inner wall of an elevator car after being installed, therefore, rigid connection with an elevator is not needed, and the installation speed and efficiency of the device are improved through the method.

The utility model discloses a high-current-carrying fireproof bus for a computing center, which is characterized in that the high-current-carrying fireproof bus comprises a shell and a conducting bar, the shell is of a split structure and comprises a U-shaped bottom shell and a U-shaped cover plate, the conducting bar is installed in the bottom shell, the upper end face of the cover plate is provided with a first ventilation hole, and the two sides of the first ventilation hole are provided with installation holes; a movable blocking piece is arranged at the first ventilation hole and comprises an upper baffle and a lower baffle, the upper baffle and the lower baffle are connected through two connecting columns, the two connecting columns are movably arranged in the mounting holes in a penetrating mode, the upper baffle is located above the cover plate, and the lower baffle is located below the cover plate; the upper baffle and the lower baffle are provided with threaded holes used for installing the connecting column, the connecting column is sleeved with a spring, one end of the spring abuts against the upper end face of the base plate, the other end of the spring abuts against the lower end face of the cover plate, and the connecting column is sleeved with the base plate which is located above the lower baffle.

The utility model discloses a sound-gathering sound box, and aims to solve the technical problems that the sound box is large in volume propagation range, causes noise pollution to others and is not friendly to the ecological environment. The device comprises a sound production unit and a sound gathering plate group, the sound gathering plate group comprises a plurality of sound gathering plates, the sound production unit comprises a sound production part, the sound gathering plates are arranged around the sound production part in a trumpet-shaped spiral winding mode, and the sound gathering plates are made of hard smooth materials. The sound gathering plate group is formed by permutation and combination of the sound gathering plates and is arranged around the sound production unit, so that a sound source is spread towards a specified direction, the volume of the outer side of the sound gathering plate group is reduced, the purpose of listening to sound entertainment is achieved, and the effect on other people is reduced.

This utility model discloses a polishing mechanism for the production of automotive semi-circular chuck parts, relating to the field of automotive semi-circular chuck part production technology. It includes a placement frame; a buffer base fixed to the lower inner side of the placement frame; a polishing body fixed to the upper end of the buffer base; a lifting mechanism installed and connected to the upper inner side of the placement frame; and a sound-absorbing closing mechanism installed and connected to the lower end of the lifting mechanism, located above the polishing body. When the lifting mechanism extends or retracts, it can change the position of the sound-absorbing closing mechanism to engage and close at the upper end of the polishing body, thereby reducing the noise caused by internal vibrations of the polishing body.

The utility model discloses a wood decoration panel installation guide rail which comprises two sets of longitudinally-arranged sliding rods, the longitudinal section of each sliding rod is in a U shape, and the upper end and the lower end of each sliding rod are fixedly connected with a wall. The device further comprises a transverse rail and a mounting assembly. The two ends of the transverse rail are in sliding connection with the corresponding sliding rods correspondingly. The multiple installation assemblies are slidably connected to the transverse rail. The mounting assembly comprises a base, a damping piece and a mounting piece; and the panel is connected with the mounting piece through a bolt. On the basis that the structural stability is guaranteed, the supporting flexibility of the decoration panel is improved.

The utility model relates to a mute bouncing core, the bouncing core is arranged in a drainage hole of a bathroom drainage device and drives a sealing cover to close or open the drainage hole, the bouncing core is composed of a shell, a screw shaft, a rotating shaft, a guide groove piece, a spring and a base, the guide groove piece is attached to the circumferential surface of the screw shaft, a guide sliding groove is formed in the guide groove piece in the length direction, and the spring is arranged in the guide sliding groove. A rotary driving part and a positioning matching part are arranged in the guide chute; a circular groove is formed in the screw shaft, the rotating shaft is rotatably mounted in the circular groove, a positioning part is arranged at the outer end of the rotating shaft, the positioning part is slidably arranged in the guide sliding groove, and the screw shaft is fixed in the shell; the upper end of the spring is inserted into the through hole in the bottom end of the screw shaft and abuts against the inner end of the rotating shaft, the lower end of the spring abuts against the base, and the base is connected to the bottom end of the shell. The bouncing core is simple in structure and convenient to install and replace, and compared with a common bouncing core, the bouncing core has the silence using effect.

The application relates to the technical field of wall heat preservation, in particular to an outer wall composite heat preservation structure, which comprises a heat preservation layer, a connecting mechanism and a wall base layer, the connecting mechanism and the heat preservation layer are connected through a non-continuous contact part, at least one closed or semi-closed air cavity is formed between the connecting mechanism and the heat preservation layer and / or in the heat preservation layer, at least one partition is arranged in the air cavity and used for dividing and supporting the air cavity. The non-continuous contact part directly reduces the physical contact area between the connecting mechanism and the heat preservation layer, weakens the heat conduction and sound vibration conduction paths from the source, and lays a structural foundation for reducing the heat bridge and sound bridge effects. Secondly, the formed air cavity has low thermal conductivity and can effectively block heat flow, thereby achieving the effects of heat insulation and sound insulation; the partition in the air cavity plays a role of supporting the air cavity structure and preventing the air cavity from collapsing in the pressure receiving or installation process, and the stability of the whole structure is enhanced.

The utility model discloses a low-temperature protection device for a condensation tank, which belongs to the technical field of low-temperature protection devices and comprises an arc-shaped sleeve, an electric heating device II is arranged inside the arc-shaped sleeve, an anti-collision component is arranged outside the arc-shaped sleeve, a fluorescent strip is arranged on the surface of the anti-collision component, and a fixing frame is arranged below the arc-shaped sleeve. A lifting plate is arranged in the middle of the fixing frame, a first electric heating device is arranged on one side of the lifting plate, an adjusting device is arranged below the lifting plate, and a cleaning assembly is arranged on the surface of the adjusting device. The anti-collision assembly is arranged, the anti-collision plate is arranged outside the arc-shaped sleeve, so that the protection effect of the arc-shaped sleeve can be improved, the air bag is arranged between the arc-shaped sleeve and the anti-collision plate, impact force generated during collision can be processed, the arc-shaped sleeve is prevented from driving the condensation tank to shake after being collided, and the condensation tank is prevented from being damaged. And silencing cotton is arranged in the anti-collision plate, so that sound generated during collision can be reduced.

The present disclosure relates to a pipeline machine. The pipeline machine comprises a machine body, a heating assembly and a flow limiting assembly. The machine body has a water inlet pipeline, a water tank and a water outlet pipeline. The water inlet pipeline is in communication with a water inlet of the water tank. The flow limiting assembly comprises a multi-stage connecting pipeline and a flow limiting pipeline. A first-stage connecting pipeline in the multi-stage connecting pipeline is in communication with a water outlet of the water tank through the heating assembly. A last-stage connecting pipeline in the multi-stage connecting pipeline is in communication with the water outlet pipeline. Adjacent two-stage connecting pipelines in the multi-stage connecting pipeline are in communication through the flow limiting pipeline. An inner diameter of the flow limiting pipeline is smaller than an inner diameter of each connecting pipeline, and the inner diameter of the flow limiting pipeline decreases or is equal along a water flow direction. The embodiment of the present disclosure can reduce the sound of bubble flow and water flow noise.

The utility model relates to the technical field of breathing mask equipment, in particular to a breathing mask capable of receiving oxygen and measuring pressure, which comprises a sealing gasket assembly, a frame assembly and a bent pipe assembly which are sequentially and detachably butted and communicated, the bent pipe assembly comprises a bent pipe, an annular silencing part and a buckle cover, a groove part is formed in the bent pipe, a plurality of vent grooves are formed in the inner side of the groove part in the peripheral direction, a hollow cylinder is arranged at the center of the groove part, the annular silencing part is arranged in the groove part, the buckle cover is arranged on the groove part in a buckled mode, and a plurality of exhaust holes are formed in the buckle cover. Exhaled waste gas is exhausted through the vent groove, the annular silencing piece and the exhaust hole in sequence; according to the breathing mask capable of receiving oxygen and measuring pressure, the problems that exhausted waste gas blows a bed accompanying part and noise is generated can be effectively solved, treatment of a patient is facilitated, and meanwhile the comfort of the patient and the bed accompanying part of the patient in the treatment process is improved; and oxygen receiving and pressure measuring functions are added, so that more use requirements are met.

The utility model relates to the technical field of keys, and particularly discloses a key back surface structure, which comprises a bottom plate, a key cap and a component force assembly, the plurality of keycaps are uniformly arranged on the bottom plate through a sliding mechanism; the component force assembly is arranged on the key cap; the component force assembly comprises a dispersion groove and a stress groove; the periphery of the keycap is provided with a dispersion groove. A stress groove is formed in the dispersion groove; according to the utility model, through the arrangement of the component force assembly, when a user presses the keycap, the keycap transmits the pressing force to the dispersion groove, so that the dispersion groove can concentrate the pressing force and transmit the pressing force to the stress groove, and the stress groove can buffer the pressing force; the pressure bearing effect of the stress groove and the durability of the keycap can be improved. The silica gel structure is simple and reasonable in structure and ingenious in design, and the silica gel structure and the elastic piece are directly combined and directly installed by removing the spacer layer.