US-12627921-B2 - Passive radiator with adjustable working frequency

US12627921B2US 12627921 B2US12627921 B2US 12627921B2US-12627921-B2

Abstract

A passive radiator with adjustable working frequency, which includes a chassis, a vibrating plate movably coupled to the chassis by a suspension component, and an added weight device arranged outside the vibrating plate. The added weight device is replaceable to adjust the working frequency of the passive radiator.

Inventors

Kwun-Kit Chan
Chi-Chou HO

Assignees

GLASS ACOUSTIC INNOVATIONS CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20231112
Priority Date: 20230109

Claims (5)

1 . A passive radiator with adjustable working frequency, comprising: a chassis; a first vibration plate connected to said chassis by a first suspension edge; a first added weight device arranged on said first vibration plate; a second vibration plate connected to said chassis by a second suspension edge; a second added weight device arranged on said second vibration plate; wherein said first vibration plate and said second vibration plate are arranged at corresponding positions on a front side and a rear side of said chassis, said first added weight device and said second added weight device having same weight for balancing said first vibration plate and said second vibration plate, wherein said first or said second added weight device comprises a plurality of different weight added weight devices, wherein the plurality of different weight added weight devices are integrated together to form an integrated added weight device which includes a central weight and at least one annular weight.
2 . The passive radiator of claim 1 , wherein said first or said second added weight device is formed on said vibrating plate by magnetic attraction, screw fixation, buckle fixation, or hook and loop fastener.
3 . The passive radiator of claim 1 , wherein plurality of different weight added weight devices of said first or said second added weight device are provided with different materials.
4 . The passive radiator of claim 1 , wherein the plurality of different weight added weight devices of said first or said second added weight device are provided with different thicknesses.
5 . The passive radiator of claim 1 , wherein said first or said second added weight device includes a mobile phone, a tablet computer or an e-book.

Description

CROSS-REFERENCE STATEMENT The present application is based on, and claims priority from, TAIWAN patent application Serial Number 112100828, filed Jan. 9, 2023, the disclosure of which is hereby incorporated by reference herein in its entirety. BACKGROUND Technical Field The present invention relates to a passive radiator, more specifically, to a passive radiator with adjustable working frequency. Related Art A loudspeaker, commonly referred to as a speaker or speaker driver, is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. For some large speakers, the quality of the sound they play generally depends on the design of the speakers. Three main speaker designs are typically sealed enclosure, vented enclosure (bass reflex enclosure) and passive types. FIG. 1A shows a traditional vented enclosure speaker with a chassis 11. The design employs an inverted tube 13 with an outlet 13a to resonate the sound behind the speaker 15 and reverse the phase of the sound to enhance the sound quality, it is also called the bass reflex speaker. This speaker enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies. FIG. 1B shows a traditional speaker with passive radiator. The design of the passive radiator speaker is similar to the one of the bass reflex speakers. The passive radiator 17 is utilized to replace the inverted tube 13. It is also a sound generator without a driving system. The passive radiator 17 may resonance and the air inside the speaker is then compressed or expanded, thereby generating the sound. The function of the bass reflex speaker (FIG. 1A) and the passive radiator speaker (FIG. 1B) is to increase the efficiency of the system at low frequencies, the frequency at which the chassis/port system resonates depends upon the effective length and cross-sectional area of the tube, the internal volume of the enclosure. The passive radiators are similar in operation to ported bass reflex systems, and both methods are used for the same reason: to extend the system's low frequency response. A passive radiator is the use of one or more additional diaphragms in a cabinet instead of ports. These passive diaphragms do not have a magnet or voice coil and are not connected to a power amplifier. In the prior art, when the passive radiator is assembled, the size, and the weight of the passive radiator are fixed and cannot be changed. From above, the operating frequency of the system cannot be adjusted once the speaker is assembled, in order to improve the drawbacks, the present invention provides replaceable passive radiators so that the operating frequency of the passive system is adjustable to meet the market demands. SUMMARY Based on above, the purpose of the present invention is to provide a passive radiator with adjustable working frequency. The passive radiator includes a chassis, a vibration plate is connected to the chassis by a suspension component. An added weight device is arranged on the vibrating plate; and the wight of the added weight device is changeable to adjust the working frequency of the passive radiator. In one example, the added weight device is configurated on the vibrating plate by magnetic attraction, screw fixation, buckle fixation, or hook and loop fastener. The pluralities of the added weight device are provided with different materials or different thicknesses. In one aspect of the present invention, the combination of pluralities of the added weight devices form an integrated added weight device. The integrated added weight device includes a central weight and at least one annular weight. In further embodiment. the added weight device includes a mobile phone, a tablet computer or an e-book. Alternatively, the added weight device is formed outside of the vibration plate. In another embodiment, the present invention discloses a passive radiator with adjustable working frequency includes a chassis; a vibration plate, a first suspension component and a second suspension component formed on an upper and lower sides of an outer supporting frame to connect with an inner supporting frame for increasing vertical vibration stability of the vibration plate, the vibration plate is connected to the chassis by the first suspension component; an added weight device is arranged on the vibrating plate; and the wight of the added weight device is changeable to adjust the working frequency of the passive radiator. In one case, the outer supporting frame and the inner supporting frame have frame structures extending along a direction perpendicular to the surface of the vibration plate. In another embodiment, the present invention discloses a passive radiator with adjustable working frequency comprises a chassis; a first vibration plate is connected to the chassis by a first suspension edge; a first added weight device is arranged on the first vibration plate; a second vibration plate is connected to the chas