JPS645432Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Technical field of the invention The invention relates to a slidable vehicle speaker, in particular, the sound pressure level changes as the speaker slides, and the sound pressure level relative to the listening position changes. Regarding car speakers that are always optimal.

(2) Prior art and problems Traditionally, in-vehicle speakers include recessed speakers and box-type speakers that are fixedly installed on the rear tray, etc., as well as speakers that can be moved and placed in an appropriate location. For example, there are devices in which a rail base is disposed on the ceiling of the vehicle interior, and the speaker body slides on the rail base. However, the latter type of sliding type vehicle-mounted speaker requires changing the volume balance each time the speaker body is installed at a different location, and it is necessary to consider the wiring process, which is cumbersome.

(3) Purpose of the invention The present invention was devised in view of the above-mentioned drawbacks of the conventional technology, and it is an object of the present invention to provide an in-vehicle speaker that can always supply a signal at the optimum level to the listening position, regardless of the position of the speaker itself. The purpose is to

(4) Structure of the invention According to the invention, the above object is to provide a speaker body having a plurality of sliders for signal input, a rail base for holding the speaker body so as to be able to slide back and forth, a signal supply section disposed on a rail base and in contact with the slider to supply a signal to the speaker body, at least a portion of the signal supply section being a resistor whose resistance value increases according to the length thereof; Consists of the body
This is achieved by providing a vehicle-mounted speaker characterized in that the level of a signal input to the speaker body changes depending on the position of the speaker body.

(5) Example of implementation of the idea Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing the principle of a vehicle-mounted speaker according to the present invention. In the figure, 1 and 1' are signal input terminals,
2 is a speaker main body; 3 is a rail base that holds the speaker main body 2 so as to be able to slide back and forth; 4 is a signal supply section that is made up of a resistor 5 and a conductor 6 and supplies signals to the speaker main body 2; 7 and 7; ' is a slider provided on the speaker body, which slides on the signal supply section 4 and inputs a signal from the signal supply section 4 to the speaker body 2. The resistor 5 is a variable resistor whose resistance value changes constantly depending on the position of the speaker body 2. Signals input to the input terminals 1 and 1' from the cassette deck, tuner, etc. (not shown) are affected by the resistance value of the resistor 5. It is attenuated to a level according to the resistance value. Then, signals are input to the speaker body 2 from the sliders 7 and 7' via the signal supply section 4, and the speaker sounds. In addition, this car speaker has signal input terminal 1.
and 1' are installed in the vehicle interior so as to be rearward relative to the driver's seat, and the resistance value of the resistor 5 is set such that the resistance value of the resistor 5 is set so that the signal is always supplied to the speaker body 2 at an optimal level for the listening position, for example, the driver's seat. A rail section 3 is provided so that the speaker main body 2 can be moved.
It is set according to the length of. In other words, when the speaker 2 is located close to the driver's seat, the resistance value of the resistor 5 is large and the level of the speaker input signal is low, and when the speaker 2 is located far away, the resistance value of the resistor 5 is small. Therefore, the level of the speaker input signal is set to be high. Therefore, it is possible to always listen to the speaker at a constant sound pressure level.

Furthermore, with this configuration, when a listener wants a sound field with sharp sound image localization, the speaker body 2 can be brought closer to take in more direct sound, and when a realistic sound field is desired, the speaker body 2 can be moved closer. 2, it is possible to freely take in a large amount of indirect sound, and it is possible to form the most effective sound field at the listening position without having to operate the volume. This effect becomes particularly effective when the in-vehicle speaker according to the present invention is mounted on both sides or on the ceiling of the vehicle interior of a one-box car, which allows the speaker body 2 to travel a long distance.

2 is a plan view showing one embodiment of the vehicle-mounted speaker according to the present invention based on the principle diagram shown in FIG. 1, and FIG. 3 is a front view of the vehicle-mounted speaker shown in FIG. 4 is a rear view of the vehicle-mounted speaker shown in FIG. 2, and FIG. 5 is a right side view of the vehicle-mounted speaker shown in FIG. 2.

In FIGS. 2 to 5, 8 and 8' are signal input terminals, which are connected to an amplifier on a cassette deck, tuner, etc. (not shown). 9 is a speaker body; 10 is a rail base having recesses 11a, 11b, and 11c arranged at equal intervals and holds the speaker body 9 so as to be able to slide back and forth; 12 is a first resistor 13; a second resistor; Signal supply parts 16a and 16, each consisting of a body 14 and a conductor 15, each laid in a straight line on the rail base 10 and supplying a signal to the speaker body 9.
b and 16c are provided in the speaker body 9, and are a first resistor 13, a second resistor 14, and a conductor 15, respectively.
It is a slider that slides on the slider 16a, 16
A signal is input to the speaker body 9 through either one of b and the slider 16c. Hollows 11a, 11
b and 11c are arranged in the same number along the first resistor 13, second resistor 14, and conductor 15, respectively. In addition, this car speaker has signal input terminal 8.
and 8' are installed in the vehicle interior so as to be rearward from the driver's seat. In this embodiment, in order to prevent the unillustrated amplifier side from being overloaded, that is, to keep the impedance of the speaker circuit constant as seen from the amplifier side, the second resistor 14 and the conductor 15 are connected, and Mover 16a and slider 16
b is connected within the speaker body 9 to make the attenuator a balanced continuously variable type.

FIG. 6 is a cross-sectional view of the A-A' staircase in FIGS. 2 and 4 showing the state when the speaker body 9 is fixed to the rail base 10, and is the same part as FIGS. 2 to 5. are given the same reference numerals.

In the figure, 17a, 17b, 17c are recesses provided in the speaker body, and 18 is a recess 17a, 1
7b, 17c and the recesses 17a, 17b, 1
Sliders 16a and 16 respectively disposed on 7c
The springs that press and hold b and 16c are shown. The recesses 17a, 17b, and 17c are the recesses 11, respectively.
a, 11b, 11c are provided at opposing positions at the same time, and when the speaker body 9 is fixed to the rail base 10, the recesses 17a, 17b, 17c and the recesses 11a, 11b, 11c slide at opposing positions. The elements 16a, 16b, 16c are pressed against the recesses 11a, 11b, 11c by the force of the spring 18, respectively, and fix the speaker body 9 to the rail base 10. Also, attach the speaker body 9 to the rail base 10 again.
When sliding along the rail base 10, when force is applied to the speaker body 9 in the direction along the rail base 10, the sliders 16a, 16b, 16c will be moved into the recesses 11a, 11.
b, 11c, and the speaker main body 9 can be slid along the rail base 10. Furthermore, the resistance values of the first resistor 13 and the second resistor 14 are set so that the speaker can always be heard at a constant sound pressure level, as shown in the principle diagram of FIG. By sliding or fixing the speaker body 9 along the rail base, it is possible to form the most effective sound field at the listening position without having to operate the volume. Note that it is also possible to slide the speaker body 9 using a motor. In that case, pulleys are rotatably attached to both ends of the rail base 10, and one of the pulleys is configured to be interlocked by a motor. Then, a wire is wound around the pulley in a loop shape, and the speaker main body 9 is attached to a part of the wire. With this configuration, the wire moves as the motor rotates, and as a result, the speaker body 9 reciprocates on the rail base 10. By driving the speaker body 9 with the motor as described above, the speaker body 9 can be slid back and forth by pressing a button from the driver's seat, thereby improving operability. Furthermore, since the speaker body 9 is also stopped by stopping the motor, the rail base 10 has recesses 11a, 11b,
11c becomes unnecessary. Furthermore, the sliders 16a, 16b, 16c and the spring 18 are always connected to the first resistor 13, the second resistor 14 and the conductor 15.
As long as the speaker input terminal is in sliding contact with the
There is no need to provide recesses 17a, 17b, and 17c in the speaker body 9, and the structure can be simplified.

FIG. 7 is a schematic diagram showing another embodiment of the vehicle-mounted speaker according to the present invention based on the principle diagram shown in FIG. 1.

In the figure, 19 and 19' are signal input terminals, 2
0 is a speaker body, 21 is a rail base that holds the speaker body 20 so as to be able to slide back and forth, and 22 is a speaker body 20 consisting of a volume 23 and a conductor 24 for general speakers in which the attenuator is of a balanced continuously variable type. a signal supply section for supplying a signal to 2;
5 and 25' are sliders provided on the speaker body 20 and slide on the conductor 24 to input signals from the conductor 24 to the speaker body 20; 26 is a motor;
7 is a pulley with a reduction gear, 28 is a pulley, 29 is a wire wound around the geared pulley 27 and the pulley 28 in a loop, and 30 is a reduction gear. The speaker body 20 is partially fixed to a wire 29 so as to be slidable along a rail base 21, and a motor 26
When rotated, the rotation speed of the motor 26 is reduced by the reduction gear of the pulley 27 with reduction gear to a speed suitable for sliding of the speaker body 20. As a result, the speaker body 20 fixed to the wire 29 is slid along the rail portion 21 at an appropriate speed. At the same time, the speed reduced by the reduction gear of the pulley 27 with a reduction gear is further reduced by the reduction gear 30, and the knob of the volume 23 is rotated, so that the optimal level signal is always delivered to the speaker body 20 for the listening position. The resistance value of the volume 23 is adjusted so that the speaker main body 20 can be moved while being supplied. According to this configuration, only two sliders 26 and 26' are required, which further simplifies the structure.

(6) Effects of the invention As explained above in detail, the in-vehicle speaker according to the invention has a structure in which the speaker body is slidable and the speaker can be listened to at a constant sound pressure level at all times at the listening position. Because there are
The listener can create the most effective sound field without having to adjust the volume. Furthermore, there is no need to connect the speaker cord to the speaker body, which simplifies the wiring process. Furthermore, by configuring the speaker body to be moved by a motor, the speaker body can be moved by pressing a button from the driver's seat, improving operability and eliminating the need for a mechanism to fix the speaker body to the rail. can also be simplified. Further, by using a volume for a general speaker in which the attenuator is of a continuously variable balanced type as a resistor, only two sliders are required, so that the structure can be further simplified.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of a vehicle-mounted speaker according to the present invention, and FIGS. 2 to 6 are diagrams showing an embodiment of the vehicle-mounted speaker according to the present invention. FIG. 2 is a plan view, and FIG. is a front view, Fig. 4 is a rear view, Fig. 5 is a right side view, Fig. 6 is A- of Figs. 2 and 4.
A' stair sectional view, FIG. 7 is a schematic diagram showing another embodiment of the vehicle-mounted speaker according to the present invention. In the figure, 1, 1', 8, 8', 19, 19'
is the signal input terminal, 2, 9, 20 are the speaker body,
3, 10, 21 are rail bases, 4, 12, 22 are signal supply parts, 5 is a resistor, 13 is a first resistor,
14 is the second resistor, 23 is the volume, 6,1
5, 24 are conductors, 7, 7', 16a, 16b,
16c, 25, 25' are sliders, 11a, 11b,
11c is a recess, 17a, 17b, and 17c are recesses, 18 is a spring, 26 is a motor, 27 is a pulley with a reduction gear, 28 is a pulley, 29 is a wire, and 30 is a reduction gear.

Claims (1)

[Scope of utility model registration request] a speaker body having a plurality of sliders for signal input; a rail base for holding the speaker body so as to be able to slide back and forth; a signal supply section that supplies a signal to the speaker main body, at least a part of the signal supply section is composed of a resistor whose resistance value increases according to the length, and the level of the signal input to the speaker main body is set to a certain level. A vehicle-mounted speaker characterized in that the speaker changes depending on the position of the speaker body.