JPH0452877Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention is applicable to, for example, CD (compact disk).
The present invention relates to audio equipment such as players and cassette decks, and particularly to audio equipment that has good stability against external vibrations.

"Prior Art" In audio equipment such as CD players and cassette decks, the signal detection systems such as optical pickups, the drive systems such as turntables and motors, and the drive systems are extremely susceptible to external vibrations. Since the vibration is weak, it is necessary to suppress transmission of excessive external vibration to mechanisms such as these signal detection systems. In particular, when the audio equipment is mounted on a vehicle, so-called in-vehicle audio equipment, suppressing the transmission of external vibrations is the main problem to be solved, and conventionally, such audio equipment has not been equipped with a vibration isolator. Generally, they are equipped with anti-vibration functions.

FIG. 5 shows an example of a conventional audio device equipped with a vibration-proofing function. This audio equipment is for car use.
This is a CD player that can be attached to a vehicle's console or dash board.
In the figure, reference numeral 1 is a fixed frame fixed to the console etc. via a chassis, and reference numeral 2 is a mechanical deck on which the main body of the audio equipment is mounted. Dampers 4, 4, which are elastically supported by the fixed frame 1 at the four corners and interposed between the fixed frame 1 and the four corners of the mechanical deck 2;
It is constructed so that the vibrations are absorbed by... Reference numerals 5, 6, and 7 are an optical pickup, a spindle motor, and a clamper attached to the mechanical deck 2, respectively.

As shown in FIG. 6, the damper 4 includes a damper holder 9 which is fixed to the fixed frame 1 and has a viscous fluid 8 sealed therein, and a damper holder 9 which is fixed to the mechanical deck 2 and whose tip end is inside the damper holder 9. It consists of an inserted shaft 10.
This damper 4 has a function of absorbing the vibration of the mechanical deck 2 by damping the vibration of the shaft 10 inserted into the damper holder 9 using the viscous fluid 8 inside the damper holder 9.

"Problems to be Solved by the Invention" By the way, in the audio equipment having the above-mentioned configuration, coil springs 3 and dampers 4 are provided at the four corners of the mechanical deck 2 as means for suppressing vibrations of the mechanical deck 2. As many as eight vibration-suppressing parts are required, leading to an increase in the number of parts in the entire device, and additional man-hours are required to install these parts, which is uneconomical and inefficient. In addition, especially for in-vehicle audio equipment,
This audio equipment is often installed diagonally in a car, and in the case of audio equipment with the above-mentioned configuration, a biased load will already act on the coil spring 3 and damper 4 at the time of installation. There was a possibility that the desired vibration suppression effect could not be achieved when the device was installed inside the vehicle.

This idea can reduce the number of parts and work man-hours in audio equipment that can suppress the vibrations of mechanical decks on which the main body of audio equipment, such as signal detection systems and travel systems, is mounted. The problem is how to create an audio device that can do this.

``Means for solving the problem'' This idea is based on a mechanical deck to which the main body of the signal detection system, drive system, etc. is attached, which is elastically supported against a fixed frame by an elastic member such as a coil spring. and a damper for absorbing vibrations of the mechanical deck is interposed between the mechanical deck and the fixed frame, wherein the damper is fixed to either the mechanical deck or the fixed frame. a damper body;
a shaft viscous-coupled with the damper body and fixed to the other, and one end of the elastic member is fixed to the damper body;
The other end protrudes from the damper body and is fixed to the shaft, and the other end is eccentric from the center of the damper body when no load is applied to the elastic member. ,
This solves the above problems.

"Operation" In this invention, one end of the elastic member is fixed to the damper holder, and the other end of this elastic member is fixed to the shaft, so it is possible to construct a component that integrates these elastic members and the damper. Become. In addition, since the other end of the elastic member is formed eccentrically with respect to the center of the damper holder, by adjusting the direction and amount of eccentricity, the other end of the elastic member can be adjusted, for example, when installing an audio device. It becomes possible to determine the positional relationship of each component such as the damper, such as by locating the part and the shaft at the center of the damper holder.

"Embodiment" Hereinafter, an embodiment in which this invention is applied to an in-vehicle CD player will be described with reference to FIGS. 1 to 4.

1 and 2 are diagrams showing the overall configuration of the CD player of this embodiment. In the figure, reference numeral 11 is a fixed frame fixed to a vehicle's dash board, console, etc. via a chassis, and reference numeral 12 is a mechanical deck. ) 14, clamper 15, and other main body parts of a CD player (audio equipment) are attached.
The mechanical deck 12 is supported at its four corners by the fixed frame 11 in a floating state via vibration absorbers 16, 16, . . . .

To explain the structure of the vibration absorbing section 16 in more detail with reference to FIGS. 3 and 4, the vibration absorbing section 16 includes a damper 17 and a coil spring ( elastic member) 18. The damper 17 includes a substantially cylindrical damper holder (damper main body) 19 fixed to the fixed frame 11, a bag-shaped rubber film 20 housed in the damper holder 19, and the rubber film 2.
0 and a shaft 22 whose base end is fixed to the mechanical deck 12 and whose distal end is inserted into the rubber membrane 20. The coil spring 18 is fixed to the damper holder 19 by inserting its proximal end (one end) 23 into a locking hole 24 formed in the proximal end of the damper holder 19, and its intermediate part is made of rubber. By being wound around the outer periphery of the membrane 20, the whole is disposed coaxially with the damper holder 19. Further, the tip end 25 of the coil spring 18 protrudes from the tip end of the damper holder 19 and is wound and fixed around the outer periphery of the shaft 22, so that the damper 17 and the coil spring 18 behave as one. Further, the tip end 25 of the coil spring 18 is formed to have a predetermined eccentric direction and eccentric amount L with respect to the center of the damper holder 19 when no load is applied to the coil spring 18. Here, the coil spring tip 2
The eccentric direction and eccentric amount L of No. 5 are CD of this example.
It is desirable that the tip of the shaft 22 be positioned at the center of the damper holder 19 when the player is mounted in a vehicle. The eccentric direction is determined by the inclination angle when mounted on the vehicle, and can be adjusted as appropriate by the locking position between the coil spring base end 23 and the damper holder 19 base end. Further, the eccentricity L is appropriately determined by the spring constant of the coil spring 18 and the weight of the mechanical deck 12, but the spring constant of the coil spring 18 may be considered in the direction along the eccentric direction.

When the CD player configured as described above is mounted in a state where it is tilted in the front-rear direction, the coil spring tip 25 is formed with a predetermined eccentric amount and eccentric direction as described above.
The mechanical deck 12 is elastically supported by the fixed frame 11 with the tip of the shaft 22 located at the center of the damper holder 19. In this state, when the mechanical deck 12 vibrates relative to the fixed frame 11, the shaft 22 fixed to the mechanical deck 12 vibrates within the damper holder 19, and as a result, the viscous fluid 21 sealed within the damper holder 19 Vibration force also acts on the However, the vibration of this viscous fluid 21 is suppressed by its own viscous resistance force, and as this viscous resistance force acts on the shaft 22, the vibration of the shaft 22, that is, the vibration of the mechanical deck 12, is absorbed. .

Therefore, according to this embodiment, the damper 17 and the coil spring 18 are integrally formed, and the vibration absorbing portion 1
6, the number of parts and the number of work steps can be reduced to less than half compared to the conventional method. In addition, since the coil spring tip 25 is eccentric in a predetermined direction and by a predetermined amount with respect to the center of the damper holder 19, even if the audio equipment of this embodiment is mounted on a vehicle in an inclined state, the damper holder 19 is offset when mounted on the vehicle. 17 shafts 22 and coil spring tips 25 are located at the center of the damper holder 19. In other words, since the positional relationship of each component such as the damper 17 when installing the audio equipment is determined, the spring constant of the coil spring 18 and the damping constant of the damper 17 can be set according to the installation state. Vibration can be suppressed depending on the situation.

Note that the audio equipment of this invention is not limited to the above-mentioned embodiments, and various modifications can be made. As an example, in the embodiment, the damper holder 19
Although the shaft 22 is attached to the fixed frame 11 and the shaft 22 is attached to the mechanical deck 12, the operation and effect are the same even if the shaft 22 is attached in the opposite manner. Also,
The material sealed in the damper holder 19 to damp vibration is not limited to the viscous fluid 21, but may be appropriately selected from well-known materials such as those based on frictional resistance. Further, the elastic member that elastically supports the mechanical deck 12 is not limited to the coil spring 18, and various modifications such as a plate spring are possible.

"Effects of the invention" As explained in detail above, according to this invention, it is possible to form the damper and the elastic member in one piece, which reduces the number of parts and the number of work steps by more than half compared to the conventional method. be done. In addition, since the other end of the elastic member is eccentric with respect to the center of the damper holder, by adjusting the direction and amount of eccentricity, for example, the shaft of the damper and the other end of the elastic member can be adjusted to the center of the damper holder. It becomes possible to determine the positional relationship of each component such as a damper when installing the audio equipment, such as locating it in the center. Therefore, since the elastic constant of the elastic member and the damping constant of the damper can be set according to the installation state, it is possible to suppress vibration according to the installation state. Therefore, according to this invention, it is possible to reduce the number of parts and the number of work steps, and it is also possible to realize an audio device that can suppress vibrations depending on the mounting state.

[Brief explanation of the drawing]

Figures 1 to 4 show this invention as an in-vehicle CD.
FIG. 1 is a perspective view showing the overall configuration, and FIG.
The figure is a front view of the same, Figure 3 is a front view showing the structure of the vibration absorbing section, Figure 4 is a side view showing the main part in cross section, and Figures 5 and 6 are of a conventional CD player. FIG. 5 is a perspective view showing the overall configuration, and FIG. 6 is a front view thereof. 11... Fixed frame, 12... Mecha deck,
17... Damper, 18... Coil spring (elastic member), 19... Damper holder, 22... Shaft,
23... Coil spring base end (one end), 25... Coil spring tip (other end).

Claims (1)

[Scope of utility model registration request] A mechanical deck to which main parts such as a signal detection system and a drive system are attached is elastically supported by a fixed frame by an elastic member such as a coil spring, and a damper is provided to absorb vibrations of the mechanical deck. In the audio equipment interposed between the mechanical deck and the fixed frame, the damper includes a damper body fixed to either the mechanical deck or the fixed frame, and a damper body that is viscously coupled to the other damper body. The elastic member has one end fixed to the damper body, and the other end protrudes from the damper body and is fixed to the shaft, and the elastic member has a shaft fixed to the damper body. An audio device characterized in that the other end is eccentric from the center of the damper body when the damper is not in operation.