46results about How to "Prevent abnormal sound" patented technology

A first weight portion of a vibration actuator includes an inner-side enlarged portion that protrudes from an end portion of a solid head in a direction of a vibration axis and that is inserted into an opening portion extending within a first compression coil spring along the direction of the vibration axis. An outer peripheral surface of the inner-side enlarged portion becomes continuously smaller in diameter from a base end towards a free end, with the vibration axis being the center of the diameter. That is, the inner-side enlarged portion has the shape of a truncated cone. The inner-side enlarged portion is inserted into the opening portion of the first compression coil spring and the opening portion is utilized to change the length of the inner-side enlarged portion in the direction of the vibration axis, thereby changing the mass of the first weight portion.

A support is embedded into a concave part (22) of a vehicle body (14) from bottom of the vehicle body. The support is mounted as sandwiching between the vehicle body (14) and a piston rod (12) by use of the vehicle load but is not fastened on the support. The support comprises: an inner side component(3); an out side component (32); an anti-vibration basal body (34) which is made of rubber elastomer for combination of the components; and a support springback stopper (36) arranged on a top end (12a) of the piston rod for restricting downwardly relative displacement of the piston rod. A stop rubber part (42) is arranged on a stop plate part (48) of the support springback stopper, the stop plate part is opposed to, with a space thereof, a top wall part (26) around an open part (28) of the concave part (22). A plurality of spherical cap protuberance (52) are arranged along circumferential direction of a bottom surface of the stop rubber part (42). This invention can prevent noise generated when a rebound stopper and a body are brought into contact with each other in undesirable deformation displacement of a piston rod in a strut mount.

A gear housing 10 has a support rib 10k formed thereon. When the female connection terminal portion 33a on the brush holder device 21 side and the male connection terminal portion 36a on the plate cover side are intruded and connected together, the support rib is engaged with a terminal supporting portion 35c that supports the female connection terminal portion 33a and holds a posture of the female connection terminal portion 33a, and thus holding the posture of the brush holder device 21. To provide a motor wherein, even if an intrusion connection force is exerted on a connection terminal portion formed in a brush holder device, a posture of the brush holder device is prevented from being changed and the state of contact between brushes held by the brush holder and a commutator is prevented from being changed.

Provided are a cap (1) which can improve the sealing property of a container and which is suitable for use in the case where the internal pressure of the container is high such as the case where the content of the container is carbonated beverage, and a container (2) with the cap. The cap comprises a cap body (4) which has a top wall (6) and a skirt wall (7) drooping from the outer periphery of the top wall (6) and in which a female screw (9) which is fit to a male screw (10) of an opening (3) of the container is formed in the skirt wall (7), and a composite resin packing (5) for sealing the opening (3) of the container. The packing (5) comprises a top plate (17) which comes into contact with the leading end portion of the opening (3) of the container and with which the end portion is covered, and a circular inner foot (18) which droops from the top plate (17) and which is adhered to the inner periphery surface of the opening (3) of the container. Further, a circular bending portion (19) which bends downward relative to the top plate (17) and with the inner periphery surface of which the outer periphery surface of the opening (3) of the container is covered is provided in continuous with the outer periphery edge of the top plate (17). Further, the cap body (4) comprises an urging portion (21) for urging the outer periphery surface of the bending portion (19) of the packing (5)in a closed state and the bending portion (19) urged is elastically transformed to be pushed to the outer periphery surface of the opening (3) of the container.

The present invention provides an anti-vibration device, which is easy to set the elastic constant within the range of small axial displacement of the inner cylinder, and can prevent the occurrence of abnormal sound during large displacement, and effectively Standing load-deflection curve. The anti-vibration device includes: an inner cylinder (12), an outer cylinder (14), and a body rubber part (16) combining the two; The edge part (18) and the small-diameter cylinder part (20) between the two flange parts constitute, and the body rubber part (16) connects the outer peripheral surface of the cylinder part (20) and the outer cylinder ( 14) are bonded between the inner peripheral surfaces, and a space portion (34) is ensured on the outer periphery of the flange portion (18), and a stopper rubber portion (24) is provided on the axial end surface of the flange portion (18). A plurality of protrusions (26) are provided on the front end surface of the stopper rubber part (24).

Provided is a scroll compressor wherein the characteristics of a so-called step-type scroll compressor are exploited to suppress the reduction of a performance or the occurrence of an abnormal noise, which is caused by a torsion moment applied to a rotary scroll. In a so-called step-type scroll compressor (1), when suctioning of gas is stopped in a plurality of pairs of compression chambers (16) which are symmetrical with respect to a point, the volume (V1) of the compression chamber (16) formed on the ventral surface side of a stationary scroll lap (14B) of a stationary scroll (14) is different from the volume (V2) of the compression chamber (16) formed on the ventral surface side of a rotary scroll lap (15B) of a rotary scroll (15).

The present invention provides a spring-type torque limiter, which prevents vibration and abnormal sound during use by increasing the rigidity of both ends of a coil spring. By making the side faces of the outer ring member protrusion (12) and the cover member protrusion (18) on both ends of the coil spring (4) mounted on the outer diameter surface of the inner ring (2) have an inclination angle , the movement of the two ends in the direction of the outer diameter is restricted, thereby increasing the rigidity, and suppressing the generation of vibration and abnormal sound of the coil spring (4).

The invention provides a cover arranged at the main body of an electrical connection box, which comprises a wall part for holding a first wiring harness and a second wiring harness connected with the electrical connection box. A first holding part is extended from the wall part in a derivative direction along the first wiring harness; the first wiring harness can be maintained outside of a holding component. The second wiring harness can be maintained at the wall part by a second holding part.

In a signal generation circuit for a compound acoustic actuator that generates a sound and a vibration in response to a frequency of a signal input to the compound acoustic actuator, the signal generation circuit comprising a plurality of signal data stored in a memory to generate a plurality of signals having mutually different frequencies, the plurality of signals at least including a signal, a frequency of which is equal to a resonant frequency causing the compound acoustic actuator to generate the vibration, a synthesizing means to synthesize a plurality of drive signals in accordance with the plurality of signal data so as to cause the compound acoustic actuator to generate the vibration, and a sweeping means to sweep the plurality of drive signals, repeatedly.

A rotation damper adapted such that air mixed in housings during assembly is not excessively compressed to prevent production of noise by the air even if a rotator is rotated in both directions and that the air is collected and made to stay at a specific portion to reduce an influence of the air to generated torque, making variation in the torque as small as possible. The rotation damper (D) has housings (11, 51), silicone oil (21) received in the housings (11, 51), a rotor (31) received in the housings (11, 51) and having a resistance section (36) that is provided on a shaft (32) projecting from the housings (11, 51) and moves in the silicone oil (21) in the housings (11, 51), and an O-ring (61) for preventing the silicone oil (21) from leaking between the shaft (32) and the housing (51). A circumferential groove (54) is formed in the inner surface of the housing (51).

A developing device includes a housing, a developer carrying member, and a magnet member. The housing contains magnetic developer. The developer carrying member is rotatably supported on the housing and carries the developer on its circumferential surface. The magnetic member has a shaft fixed inside the developer carrying member and a plurality of developer carrying member-side magnetic poles fixed to the shaft in its circumferential direction. An even number of the developer carrying member-side magnetic poles are formed by plastic magnets, one or more other of the developer carrying member-side magnetic poles are formed by rubber magnets, and one or more pairs of the plastic magnets located opposite each other across the shaft have the same shape and are fixed in axial symmetry with respect to the shaft.

An inexpensive and lightweight opening / closing device of door and the like with small number of components comprises a member shape holding mechanism in which an insertion member is not deformed even when the device is opened fully by an undue external force but exhibits a practical strength as an opening / closing device thus sustaining the full open state surely, and generation of strange sound from a latching mechanism can be prevented during the opening / closing operation and under full open state. The opening / closing device comprises an aluminum outer tube having a substantially square flat cross-section or a stainless steel outer tube having a substantially C-shaped cross-section, an aluminum insertion member having a substantially C-shaped flat cross-section or substantially square cross-section and inserted into the outer tube or a stainless steel interior member having a substantially C-shaped cross-section and inserted into the outer tube, an engaging plate provided on the base at the distal end of the outer tube, a leaf spring provided in the insertion member, and a sliding member provided at the rear end of the insertion member.

The charging circuit is used for bridge type load with an amplifying unit and a load unit. The amplifying unit drives load unit according to audio signals and reference voltage; the reference voltage is saved in a reference capacitor. The charging circuit comprises a power unit and a comparator; the power unit provides a first reference voltage and a second reference voltage; when the reference voltage is lower than a first preset value, the comparator disenables the control signal for providing the first voltage for the capacitor; when the reference voltage is higher than or equal to the first preset value and is lower than the second preset value, the comparator enables the control signals for providing a second voltage for the reference capacitor.

The invention provides an automobile stern door electric jackstay which comprises a sleeve and a lead screw, wherein the sleeve comprises a first sleeve and a second sleeve coaxially connected; an internal thread is formed in the inner wall of the first sleeve; a lap of protruding edge is arranged on the inner wall of the sleeve between the first sleeve and the second sleeve; the lead screw comprises a first rod body and a second rod body coaxially connected; the first rod body is in screw joint with the first sleeve; a stop dog is in screw joint with the periphery of the second rod body; thesecond rod body and the stop dog are positioned in the first sleeve; the stop dog can be in contact with the protruding edge; and the rotation direction of a second external thread in the second rod body is opposite to that of a first external thread in the first rod body. The automobile stern door electric jackstay can prevent a jackstay body from loosening and prevents a stern door from generating abnormal sound during the operating process.

The invention relates to the technical field of air conditioning, and discloses a heat exchange assembly. The assembly comprises a fan structure and a heat exchanger. The fan structure comprises a hub and a fan blade set, and the fan blade set is connected with the hub; an annular space is formed between the fan blade set and the hub in the radial direction of the hub; and the heat exchanger can be arranged in the annular space. According to the heat exchange assembly, the heat exchanger is arranged in the fan structure, and when air enters the fan structure in the axial direction, the air firstly flows through the heat exchanger and then is exhausted through the fan structure. The air speed is low when the air flows through the heat exchanger, and abnormal sound can be effectively prevented. Moreover, the size of a fan can be enlarged, thereby reducing the rotating speed of the fan and reducing noise. Moreover, the heat exchanger is embedded into the fan structure, so that the space is saved, and the heat exchange assembly is more compact in structure and can be more conveniently applied to an air conditioning system. The invention further discloses the air conditioning system.

The invention discloses a noise reduction method for a vehicle, and the method comprises the following steps: S1, respectively measuring a loudspeaker of each sound reproduction channel of a vehicle-mounted audio system, and obtaining the maximum non-distortion output amplitude of a signal corresponding to each frequency point in a frequency domain; S2, generating a reference signal, and filteringthe reference signal through an adaptive filter to generate a control signal; S3, comparing the control signal with the maximum output amplitude, if the control signal is not greater than the maximumvalue of the maximum output amplitude, directly converting the control signal into an analog signal, and feeding the analog signal to loudspeakers of corresponding sound reproduction channels througha power amplifier; and if the control signal is greater than the maximum value of the maximum output amplitude, performing power compression on the control signal, converting the control signal subjected to power compression into an analog signal, and feeding the analog signal to the loudspeakers of corresponding sound reproduction channels through the power amplifier. The possibility of the divergence of an active noise control system can be solved, and abnormal sound is prevented from being generated as soon as possible.

Provided is an air conditioner for a vehicle capable of preventing generation of unusual sound at a connection part by a connection member of a wind direction member in first and second air blowing out port devices. A second engagement part 86 provided on the connection member 84 is engaged with a first engagement part 36 provided on each wind direction member in such a state that the connection member 84 for connecting the wind direction members to each other in the first and second air blowing out port devices 14, 16 is deflection-deformed. Thereby, the second engagement part 86 is pressed / brought into contact with the first engagement part 36 based on restoration force relative to the deflection-deformation of the connection member 84.