KR-20260067492-A - VIBRATION TYPE SOUND GENERATIOR

KR20260067492AKR 20260067492 AKR20260067492 AKR 20260067492AKR-20260067492-A

Abstract

The present invention discloses an excitation-type sound generating device. The excitation-type sound generating device of the present invention may include: a housing having an opening formed therein; a cover installed to cover the opening of the housing; a bobbin extending axially from the cover and formed in a cylindrical shape; an exciter disposed inside the housing; a coil portion disposed on the bobbin and inserted into the circumference of the exciter, and vibrating the exciter as power is applied; a shaft axially coupled to the exciter; and an excitation force transmission portion connecting the exciter and the shaft to transmit an excitation force generated from the exciter to the shaft.

Inventors

이상일

Assignees

젠스웰 주식회사

Dates

Publication Date: 20260513
Application Date: 20241105

Claims (13)

Housing in which an opening is formed; A cover installed to cover the opening of the above housing; A bobbin extending axially from the above cover and formed in a cylindrical shape; A vibrator disposed inside the above housing; A coil portion disposed on the bobbin, inserted into the circumference of the exciter, and vibrating the exciter as power is applied; A shaft axially coupled to the above-mentioned extruder; and An excitation-type sound generating device comprising: an excitation force transmission unit connecting the excitation member and the shaft to transmit the excitation force generated from the excitation member to the shaft.
In paragraph 1, The above-mentioned excitation force transmission unit is, An elastic member connecting at least one of the axial side of the exciter and the shaft, and the other axial side of the exciter and the shaft; comprising an excitation-type sound generating device.
In paragraph 2, The above elastic part is, An outer ring formed along the circumferential direction on one side of the axial direction of the above-mentioned exponent; An inner ring connected to the shaft above; and A sound generating device comprising a plurality of elastic connecting parts connecting the outer ring and the inner ring.
In paragraph 3, The above elastic connecting part is arranged to be inclined in the circumferential direction with respect to the radial direction of the inner ring, a vibration-type sound generating device.
In paragraph 3, The above elastic part is, A sound generating device for vibration, further comprising a spacer installed on at least one of the axial sides and the other of the exciter to support the outer ring.
In paragraph 2, The above elastic part is, A plurality of elastic plates fixed to at least one of the axial side and the other side of the above-mentioned exciter and arranged in the radial direction of the above-mentioned exciter; and A sound generating device comprising: a central ring coupled to the shaft and connecting the plurality of elastic plates to the shaft.
In paragraph 6, The above elastic plate is, A flat elastic member fixed to the center ring and extending in the radial direction of the center ring; and A vibration-type sound generating device comprising: a bent portion that is bent toward the exciter side from the above-mentioned flat elastic portion and fixed to the exciter by a fastening member.
In paragraph 2, The above elastic part is, A fixing ring connected to at least one of the axial sides and the other of the above-mentioned extruder; A support ring facing the fixed ring and supported by the housing or the cover; and A sound generating device comprising a plurality of elastic pieces connected to the fixed ring and the support ring.
In paragraph 8, The above elastic piece is, A slider part slidably coupled to the above fixed ring; An inclined portion extending axially at an angle from the above slider portion; and A vibration-type sound generating device comprising: a fixed part extending from the inclined part and fixed to the support ring.
In paragraph 8, The above elastic piece is arranged parallel to the tangential direction of the above fixed ring, forming an excitation-type sound generating device.
In paragraph 8, A sound generating device in which the fixed ring and the support ring are spaced apart in the axial direction.
In paragraph 2, The above elastic part is, A fixing ring connected to at least one of the axial sides and the other of the above-mentioned extruder; An intermediate ring coupled to the above shaft; A plurality of connecting ribs connecting the fixed ring and the intermediate ring; and A sound generating device comprising: a plurality of coil springs arranged along the circumferential direction of the fixed ring and supported by the housing or the cover.
In paragraph 1, The person with the above possession, An outer yoke disposed inside the above housing, through which the shaft passes, and in which the coil portion is disposed along the inner surface; An inner yoke disposed inside the outer yoke, through which the shaft passes, and disposed on the inner side of the coil portion; and A sound generating device comprising: a magnet disposed between the outer yoke and the inner yoke, through which the shaft passes.

Description

Vibration Type Sound Generator The present invention relates to an excitation-type sound generating device in which the excitation force of the exciter is directly transmitted to the shaft, preventing friction or damage between the exciter and the coil part, minimizing loss of excitation force, and increasing driving force. Recently, as vehicle technology advances, driving feel is also acting as a factor in purchasing power. To enhance driving feel, methods are being explored to transmit some of the noise generated by the vehicle's engine to the driver. Since hybrid or electric vehicles drive using the output of a motor rather than the engine, engine noise and vibration are significantly reduced. Consequently, drivers may find it difficult to perceive a sense of speed or driving sensation. Recently, virtual sporty driving sounds desired by the user are also being implemented depending on the vehicle's driving conditions. The excitation-type virtual sound generator is a device that creates a virtual interior engine sound desired by the user; it controls the frequency by order according to the vehicle's driving conditions to excite the actuator and reproduces various sounds into the cabin through the vehicle's transmission system. In this process, the exciter transmits excitation force to the housing via a spring and can generate sound by exciting the vehicle body and the windshield through bolt connections. However, conventional excitation-type virtual sound generators transmit the axial excitation force of the exciter to the housing through a spring, so the excitation force can be transmitted to the shaft through the housing. Consequently, since the transmission path of the excitation force becomes long, a loss of driving force may occur. In addition, as the exciter is transmitted to the housing, the housing and the exciter vibrate, so the coil or bobbin may be damaged or worn out by the exciter and the housing. In addition, a section of rapid driving force change may occur due to the resonance influence of the housing. That is, a first-order resonance may occur due to the exciter and the spring, and a second-order resonance may occur due to the natural frequency of the housing. Accordingly, the change in driving force may increase in the second-order resonance region caused by the housing. FIG. 1 is a schematic diagram illustrating the state in which an excitation-type sound generating device according to the present invention is installed in a vehicle. FIG. 2 is a cross-sectional view schematically illustrating a first embodiment of an excitation-type sound generating device according to the present invention. FIG. 3 is an exploded perspective view schematically illustrating an excitation-type sound generating device according to the present invention. FIG. 4 is a cross-sectional view schematically illustrating an excitation force transmission unit in an excitation-type sound generating device according to the present invention. FIG. 5 is a cross-sectional view schematically illustrating the transmission path of the excitation force in an excitation-type sound generating device according to the present invention. FIG. 6 is a schematic perspective view illustrating a second embodiment of an excitation-type sound generating device according to the present invention. FIG. 7 is a cross-sectional view schematically illustrating a second embodiment of an excitation-type sound generating device according to the present invention. FIG. 8 is a schematic perspective view illustrating a third embodiment of an excitation-type sound generating device according to the present invention. FIG. 9 is a cross-sectional view schematically illustrating a third embodiment of an excitation-type sound generating device according to the present invention. FIG. 10 is a cross-sectional view schematically illustrating the installation structure of an elastic piece in the vibration-type sound generating device of FIG. 9. FIG. 11 is a schematic perspective view illustrating a fourth embodiment of an excitation-type sound generating device according to the present invention. FIG. 12 is a cross-sectional view schematically illustrating a fourth embodiment of an excitation-type sound generating device according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but can be modified and implemented in various different forms. The embodiments provided are merely intended to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Accordingly, the present invention should be understood not to be limited to the embodiments disclosed below, but to include all modifications, equivalents, and substitutions that fall within the technical spirit and scope of the present invention, as well