JP2022100757A - Exciter - Google Patents

Abstract

To provide an exciter enabling sound in a high sound range to be played back to sound having high sound quality.SOLUTION: An exciter 1 comprises: a first vibrating body 12 arranged inside a frame 4 via a damper 5; a second vibrating body 22 arranged in an opening 6 formed in the frame; a vibration member 21 arranged in such a way as to cover the opening 6 of the frame 4 via an edge 7 from an outside of the frame 4; a first voice coil bobbin 13 in which one end 13A thereof is arranged in a second yoke 24 of the second vibrating body 22, the other end 13B is extended to the neighborhood of the first vibrating body 12, and a first voice coil 17 is arranged at the other end 13B; and a second voice coil bobbin 23 which has one end 23A attached to the edge 7 and is consequently arranged in the opening 6 of the frame 4, and which has the other end 23B extended to the neighborhood of the second vibration body 22, wherein a second voice coil 27 is arranged at the other end 23B.SELECTED DRAWING: Figure 2

Description

The present invention relates to an exciter.

Patent Document 1 is known as a technique related to high-pitched sound output of an exciter.
In the abstract of Patent Document 1, in the column of "problem", it is described that "providing an exciter capable of outputting high frequency sound to high sound quality". In the "Solution" column, "The exciter 1 is installed inside the vibrating body 2 provided with the yoke and the magnet, the frame 3 in which the vibrating body 2 is internally installed via the damper 4, and the inside of the frame 3. The other end 5b is extended to the vicinity of the vibrating body 2 and includes a voice coil bobbin 5 provided with a voice coil 11 at the other end 5b. An opening 3b is formed in the frame 3 and a voice coil bobbin is formed from the opening 3b. The voice coil bobbin 5 is attached to the peripheral edge of the opening 3b so that one end 5a of the 5 is open to the outside of the frame. Further, the voice coil bobbin 5 is provided with a vibration member 10 so as to cover the open portion. . "."

Japanese Unexamined Patent Publication No. 2016-76763

In the configuration of Patent Document 1, the vibrating member 10 that outputs the high-pitched sound is affected by the vibration of the vibrating body 2, and the high-pitched sound may be distorted.
Further, the voice coil bobbin 5 transmits the vibration of the vibrating body 2 to the vibrating member 10 by extending from the opening 3a of the frame 3 to the vicinity of the vibrating body 2 arranged inside the frame 3, but vibrates from the vibrating body 2. The distance to the member 10 is relatively long, and it is difficult for minute vibrations to be transmitted to the vibrating member 10.

An object of the present invention is to provide an exciter capable of reproducing high-pitched sound with high sound quality.

One aspect of the present invention has a first yoke and a first magnet provided on the first yoke, and the first vibrating body internally installed in the frame via a damper and the frame. A second yoke provided in the frame so as to cover the formed opening from the inside of the frame and having a recess recessed toward the inside of the frame, and a second yoke installed in the second yoke. A second vibrating body having a magnet, a vibrating member installed so as to cover the opening of the frame from the outside of the frame via an edge, and one end attached to the recess of the second yoke. The first voice coil bobbin is cylindrical and has the other end extended to the vicinity of the first vibrating body and the first voice coil is provided at the other end. By attaching one end to the edge to which the vibrating member is connected, the other end is installed in the opening of the frame, and the other end is extended to the vicinity of the second vibrating body, and the other end is extended to the vicinity of the second vibrating body. It has a cylindrical second voice coil bobbin provided with a second voice coil, and the first vibrating body vibrates in response to an acoustic signal flowing through the first voice coil, and the first vibrating body vibrates. When the vibration of the vibrating body is transmitted to the frame via the damper, the first vibrating portion for outputting sound via the transmission medium in which the frame is installed and the acoustic signal flowing through the second voice coil The second vibrating body vibrates accordingly, and the vibration of the second vibrating body is transmitted to the vibrating member, so that a second sound in a higher frequency range than the first vibrating portion is output into the air. It is an exciter characterized by having a vibrating part.

According to the present invention, it is possible to reproduce high-pitched sound with high sound quality.

It is a perspective view which shows the structure of the exciter which concerns on embodiment of this invention. It is a schematic diagram which shows the internal structure of an exciter. It is a schematic diagram which shows the state which the exciter is installed in the passenger compartment of a vehicle. It is a schematic diagram which shows the internal structure of the exciter which concerns on the 1st modification of this invention. It is a schematic diagram which shows the internal structure of the exciter which concerns on the 2nd modification of this invention. It is a schematic diagram which shows the internal structure of the exciter which concerns on the 3rd modification of this invention. It is a schematic diagram which shows the internal structure of the exciter which concerns on the 4th modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the configuration of the exciter 1 according to the present embodiment.
As shown in FIG. 1, the exciter 1 includes two vibrating portions, a first vibrating portion 10 and a second vibrating portion 20, which vibrate based on an acoustic signal given from the outside, and an appropriate transmission medium 60. It is a speaker installed in (Fig. 3).
The exciter 1 outputs a sound through the transmission medium 60 by the vibration of the first vibrating unit 10, and is a sound in a higher frequency range than the sound output through the transmission medium 60 (hereinafter referred to as "treble"). ) Is output into the air by the vibration of the second vibrating unit 20, so that the sound in a wide frequency band from the high frequency range to the low frequency range is reproduced.

As shown in FIG. 1, the exciter 1 of the present embodiment is provided on the side of a bottomed cylindrical frame 4 having a bottom surface portion 4A and an open side end portion (hereinafter referred to as an upper end portion 4B) of the frame 4. The first vibrating portion 10 is arranged on the top surface side of the frame 4 via the damper 5, and the second vibrating portion 20 is arranged on the bottom surface portion 4A of the frame 4. As a result, the first vibrating portion 10 and the second vibrating portion 20 are arranged vertically.

FIG. 2 is a schematic diagram showing the internal configuration of the exciter 1.
The first vibrating unit 10 includes a first vibrating body 12 and a first voice coil bobbin 13, and the first vibrating body 12 is internally provided in the frame 4 via the damper 5.
The first vibrating body 12 includes a first yoke 14 made of a magnetic material, a disk-shaped first magnet 15, and a disk-shaped first metal plate 16 made of a metal material, which are magnetic. It constitutes a circuit.
The first yoke 14 has a cylindrical shape having a circular top surface portion 14A and a cylindrical side wall portion 14B, and the first magnet 15 is attached to the top surface portion 14A1 of the top surface portion 14A with an adhesive. The first metal plate 16 is adhered with an adhesive so as to be laminated on the first magnet 15.
The diameters of the first magnet 15 and the first metal plate 16 are both large enough to form a gap between the first magnet 15 and the side wall portion 14B of the first yoke 14, and the gap is used to form the first magnetic circuit. A magnetic gap g1 is formed.

In the first vibrating body 12, a damper 5 is connected to each of the outer peripheral surface 14B1 of the side wall portion 14B of the first yoke 14 and the end portion 14B2 on the open side, and the first vibrating body 12 is framed by these dampers 5. It is elastically supported on the top surface side of No. 4.
Each of the dampers 5 is a metal plate-shaped member having a rigidity sufficient to support the first vibrating body 12, and reduces the vibration of the first vibrating body 12 to the frame 4 as much as possible. It is configured to be communicable without any problems. The damper 5 of the present embodiment is configured by providing, for example, a large number of slit holes 5A (FIG. 1) having an appropriate shape in order to increase elasticity in the surface of a thin plate-shaped base material made of stainless steel.

As shown in FIG. 2, the first voice coil bobbin 13 is a cylindrical member installed inside the frame 4, and is made of a material having high thermal conductivity (for example, metal). In the first voice coil bobbin 13, one end 13A is fixed to the recess 24D of the second yoke 24 included in the second vibrating body 22, which will be described later, and the first voice coil 17 through which the acoustic signal flows is the outer peripheral surface of the other end 13B. It is wound around. By extending the other end 13B to the vicinity of the first vibrating body 12, the first voice coil 17 is arranged in the first magnetic gap g1 of the first vibrating body 12.

In the first vibrating unit 10 having such a configuration, when an acoustic signal flows through the first voice coil 17, a Lorentz force corresponding to the acoustic signal is generated between the first voice coil 17 and the first vibrating body 12. As a result, the first voice coil 17 and the first vibrating body 12 vibrate. When the vibration of the first vibrating body 12 is transmitted to the frame 4 via the damper 5, the vibration is transmitted to the transmission medium 60 to which the frame 4 is fixed, and the sound is output from the transmission medium 60.

Next, the second vibrating portion 20 will be described in detail.
As shown in FIG. 2, a circular opening 6 is formed in the bottom surface portion 4A of the frame 4, and a second vibrating portion 20 is arranged in the opening portion 6.
The second vibrating unit 20 of the present embodiment includes a second vibrating body 22, a second voice coil bobbin 23, and a vibrating member 21.

The second vibrating body 22 is a member internally installed in the frame 4, and has a second yoke 24 made of a magnetic material and a material having high thermal conductivity (iron in this embodiment), and a disk-shaped first. A second magnet 25 and a disk-shaped second metal plate 26 made of a metal material are provided, and these form a magnetic circuit.
The second yoke 24 has a dish shape having a circular top surface portion 24A, a cylindrical side wall portion 24B, and an annular flange portion 24C, and the frame 4 is formed by the top surface portion 24A and the side wall portion 24B. A concave portion 24D recessed inside (the side of the bottom surface portion 4A) is configured. In the second yoke 24, the second magnet 25 is adhered to the top surface 24A1 of the top surface portion 24A with an adhesive, and the second metal plate 26 is adhered so as to be laminated on the second magnet 25. It is glued with.
The diameters of the second magnet 25 and the second metal plate 26 are large enough to form a gap between the second magnet 25 and the side wall portion 24B of the second yoke 24, and the gap causes the second magnetic gap of the magnetic circuit. g2 is formed.

In the second yoke 24, the flange portion 24C is adhered to the frame 4 with an adhesive so that the recess 24D covers the opening 6 of the bottom surface portion 4A from the inside of the frame 4. As a result, the second vibrating body 22 is arranged inside the frame 4 at a position facing the opening 6.
Further, one end 13A of the cylindrical first voice coil bobbin 13 included in the first vibrating portion 10 is fitted into the cylindrical recess 24D of the second yoke 24, and the second yoke 24 and the first voice are fitted. The coil bobbin 13 and the coil bobbin 13 are fixed with an adhesive. According to this fixed structure, the position of the first voice coil bobbin 13 is determined by the position of the second yoke 24, so that the positioning of the first voice coil bobbin 13 becomes easy.

An edge 7 is provided on the opening edge of the opening 6. The edge 7 is a member for attaching the vibrating member 21 to the frame 4 without significantly reducing the vibration of the vibrating member 21. The edge 7 forms an annular shape surrounding the opening 6 and is fixed to the bottom surface portion 4A of the frame 4. The vibrating member 21 of the second vibrating portion 20 and the second voice coil bobbin 23 are both connected to the edge 7.

The second voice coil bobbin 23 is a cylindrical member, one end 23A is connected to the edge 7, and the second voice coil 27 through which an acoustic signal flows is wound around the outer peripheral surface of the other end 23B. In the second voice coil bobbin 23, the other end 23B is extended to the vicinity of the second vibrating body 22, so that the second voice coil 27 is the second magnetism of the magnetic circuit of the second vibrating body 22. It is arranged in the gap g2.

The vibration member 21 is a member used for the dome portion of a speaker (that is, a tweeter) dedicated to high frequency output, and is, for example, a dome-shaped member made of silk. The vibrating member 21 is connected to the edge 7 from the outside of the frame 4 so as to cover the opening 6. The material of the vibrating member 21 may be other than silk.

In the second vibrating unit 20 having such a configuration, when an acoustic signal flows through the second voice coil 27, a Lorentz force corresponding to the acoustic signal is generated between the second voice coil 27 and the second vibrating body 22. As a result, the second voice coil 27 and the second vibrating body 22 vibrate. When the vibration of the second voice coil 27 is transmitted to the vibrating member 21 via the second voice coil bobbin 23, the vibration of the vibrating member 21 converts the acoustic signal into air vibration (physical vibration), and the sound vibrates. It is output to the air via the member 21. As described above, the vibrating member 21 is the same as the member used for the dome portion of the speaker dedicated to high frequency output, so that the sound output by the vibrating member 21 is higher than that of the first vibrating portion 10.

Further, in the second vibrating portion 20, both the vibrating member 21 and the second voice coil bobbin 23 are not directly fixed to the frame 4, but are fixed via the edge 7. Therefore, the vibration of the second vibrating unit 20 is less likely to be affected by the vibration of the frame 4 by the first vibrating unit 10, and high-quality high-pitched sound with less distortion is reproduced.

Further, the vibrating member 21 is connected not to the first voice coil bobbin 13 of the first vibrating portion 10 but to the second voice coil bobbin 23 extending from the second vibrating body 22 arranged in the opening 6. The second voice coil bobbin 23 can make the distance from the vibrating member 21 on the one end 23A side to the second voice coil 27 on the other end 23B shorter than that of the first voice coil bobbin 13. That is, as compared with the configuration in which the vibrating member 21 is connected to the first voice coil bobbin 13, finer vibrations are more likely to be transmitted to the vibrating member 21, and higher-pitched sounds with finer texture can be output.

FIG. 3 is a schematic view showing a state in which the exciter 1 is installed in the vehicle interior of the vehicle 70.
The vehicle 70 includes a roof panel 71 that constitutes a roof and a plate-shaped interior material 72 that forms a ceiling surface in the vehicle interior, and the exciter 1 is an attic space between the roof panel 71 and the interior material 72. It is placed in Sa. Specifically, in the exciter 1, the bottom surface portion 4A of the frame 4 is fixed on the surface of the interior material 72 with, for example, double-sided tape, and the interior material 72 is used as the transmission medium 60. Further, the interior material 72 is formed with an opening 73 for outputting high-pitched sound to the vehicle interior space Sb, and when the exciter 1 is fixed, the vibrating member 21 of the second vibrating portion 20 is arranged in the opening 73. To.

In such an installation state, the first vibrating portion 10 of the exciter 1 vibrates, causing the interior material 72, which is the transmission medium 60, to vibrate, and sound is output to the vehicle interior space Sb via the interior material 72. Further, when the second vibrating portion 20 vibrates, the vibrating member 21 vibrates, and high-pitched sound is output from the opening 73 of the interior material 72 (transmission medium 60) to the vehicle interior space Sb.

According to this configuration, even if the material of the interior material 72 of the vehicle 70 is a material unsuitable for reproducing high-pitched sound (for example, plastic or the like), the second vibrating portion 20 different from the first vibrating portion 10 Since the high-pitched sound is output, the sound in a wide frequency band from low-pitched sound to high-pitched sound is reproduced in the vehicle interior space Sb.

According to the above-described embodiment, the following effects are obtained.

The exciter 1 of the present embodiment transmits sound through the transmission medium 60 by vibrating the first vibrating body 12 in response to an acoustic signal flowing through the first voice coil 17 provided in the first voice coil bobbin 13. It includes a first vibrating unit 10 that outputs a sound, and a second vibrating unit 20 that outputs a higher sound than the first vibrating unit 10.
The second vibrating portion 20 includes a vibrating member 21 and a second voice coil bobbin 23 having a vibrating member 21 at one end 23A and a second voice coil 27 at the other end 23B. The vibration of the second voice coil bobbin 23 corresponding to the acoustic signal flowing through the second voice coil 27 is transmitted to the vibration member 21 to output sound.

According to such a configuration, since it is not necessary to provide a speaker for outputting high-pitched sound separately from the exciter 1, it is possible to save space and reduce the number of parts, and it is possible to reduce the cost.

Further, in the second vibrating portion 20, both the vibrating member 21 and the second voice coil bobbin 23 are not directly fixed to the frame 4, but are provided on the frame 4 via the edge 7. Therefore, the vibration of the second vibrating unit 20 is less likely to be affected by the vibration of the frame 4 by the first vibrating unit 10, and high-quality high-pitched sound with less distortion can be output.

Further, since one end 13A of the first voice coil bobbin 13 is fixed to the recess 24D of the second yoke 24, the positioning of the first voice coil bobbin 13 becomes easy.

In the exciter 100 of the present embodiment, the length of the second voice coil bobbin 23 from one end 23A to the other end 23B is shorter than that of the first voice coil bobbin 13.
According to this configuration, as compared with the configuration in which the vibrating member 21 is connected to the first voice coil bobbin 13, minute vibrations are easily transmitted to the vibrating member 21, and high-quality high-pitched sound with finer texture can be output. ..

The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

[First modification]
FIG. 4 is a diagram schematically showing the internal configuration of the exciter 100 according to this modification. In the figure, the same reference numerals are given to the members already described, and the description thereof will be omitted.
The exciter 100 is the exciter 1 of the above-described embodiment in which the second damper 170 is provided separately from the damper 5.
The second damper 170 is a member for supporting the first vibrating body 12 to the frame 4, and has dust collecting property and air permeability that can prevent dust and dirt from entering the inside of the frame 4. It is a fiber base material molded into an appropriate shape (typically corrugated). For such a base material, a cloth woven by blended yarn and impregnated with a thermosetting resin such as a phenol resin, or "Conex" (registered trademark), which is a meta-aramid fiber manufactured by Teijin Limited, shall be used. Can be done.

Then, in the exciter 100, the second damper 170 is inside the frame 4 (on the side of the bottom surface portion 4A) of the damper 5 provided at the upper end portion 4B of the frame 4 so that the second damper 170 is located at the open end of the frame 4. Is located in.
According to this arrangement, the fine dust that has entered the frame 4 from the slit hole 5A of the damper 5 is collected by the second damper 170, and the intrusion into the inside of the frame 4 is prevented. As a result, the sound quality of the exciter 100 is not affected by the fine dust that has entered the frame 4.
Further, since the second damper 170 is breathable, heat does not accumulate inside the exciter 1.

In this modification, any of the two dampers 5 may be replaced with the second damper 170.

[Second modification]
FIG. 5 is a diagram schematically showing the internal configuration of the exciter 200 according to this modification. In the figure, the same reference numerals are given to the members already described, and the description thereof will be omitted.
In the exciter 1 of the above-described embodiment, the exciter 200 includes a first vibrating body 12 and a second vibrating body 22 by providing a top surface portion 175 that closes the open side of the frame 4. It is formed in the shape of a cylinder.
According to this modification, the entire first vibrating portion 10 such as the damper 5 that supports the first vibrating body 12 on the frame 4 is housed in the frame 4, so that the damper 5 has a slit hole 5A (FIG. 1). Even when the frame 4 is provided, it is possible to reliably prevent the frame 4 from entering the inside.

[Third modification example]
FIG. 6 is a diagram schematically showing the internal configuration of the exciter 300 according to this modification. In the figure, the same reference numerals are given to the members already described, and the description thereof will be omitted.
In the exciter 300, in the exciter 1 of the above-described embodiment, a second opening 177 having an appropriate shape in a plan view is formed on the bottom surface portion 4A of the frame 4, and the flange portion 24C of the second yoke 24 is the second. By installing the flange portion 24C in the frame 4 so as to close the opening 177 from the inside, the flange portion 24C is configured to be exposed to the outside air from the second opening 177. In the bottom surface portion 4A, the second opening portion 177 is provided at a position where the edge 7 is not covered, that is, on the outer peripheral side of the edge 7.

In the exciter 300, the first voice coil bobbin 13 and the second yoke 24 are formed of a material having high thermal conductivity. Therefore, the heat generated by the first voice coil bobbin 13 and the first voice coil 17 is transferred to the second yoke 24 and radiated to the outside from the second opening 177.
As a result, the heat trapped inside the frame 4 is suppressed.
Further, since the second opening 177 is closed by the second yoke 24, it is possible to prevent fine dust from entering the inside of the frame 4 from the second opening 177.

In the exciter 300 of this modification, the open side of the frame 4 may be closed by the top surface portion 175 as in the second modification.
As a result, it is possible to prevent heat from being trapped by heat radiation from the second opening 177 while reliably preventing fine dust from entering the inside of the frame 4.
Further, the exciter 300 of the present modification may be provided with the second damper 170 as in the first modification.

[Fourth variant]
FIG. 7 is a diagram schematically showing the internal configuration of the exciter 400 according to this modification. In the figure, the same reference numerals are given to the members already described, and the description thereof will be omitted.
In the exciter 400, in the exciter 300 of the third modification described above, the first vibrating body 12 includes a third magnet 178 in order to increase the magnetic flux of the magnetic circuit of the first vibrating unit 10. The third magnet 178 and the first magnet 15 are arranged to face each other so as to sandwich the first metal plate 16 between the same poles, thereby forming a repulsive magnetic circuit.
Further, the exciter 400 includes a fourth magnet 179 in which the second vibrating body 22 is provided on the second yoke 24, and the fourth magnet 179 is at a position facing the third magnet 178 and is the same as each other. It is provided so that the poles face each other and repel each other.
According to this exciter 400, the third magnet 178 is provided in the first vibrating portion 10, so that the first vibrating body 12 (third magnet 178) and the second vibration of the first vibrating portion 10 are provided. Even if the space between the second vibrating body 22 and the portion 20 becomes narrow, the third magnet 178 of the first vibrating body 12 is attracted to the second vibrating body 22 when the first vibrating body 12 vibrates. It is possible to prevent problems such as vibration.

In addition to the exciter 300 of the third modification, the third magnet 178 and the fourth magnet 179 of the present modification include the exciter 1 of the above-described embodiment, the exciter 100 of the first modification, and the second. It can also be provided in the exciter 200 of the modified example.

[Other variants]
In the above-described embodiment, the description relating to the directions such as horizontal and vertical, various numerical values, and the shape excludes the periphery of the direction, the periphery of the numerical value, and the approximate shape unless otherwise specified. is not. That is, as long as they have the same effect as the direction, the numerical value, and the shape, the direction, the numerical value, and the shape in the embodiment are the periphery of the direction, the periphery of the numerical value, and the approximate shape (so-called uniform range). )including.

1, 100, 200, 300, 400 Exciter 4 Frame 5 Damper 5A Slit hole 6 Opening 7 Edge 10 First vibrating part 12 First vibrating body 13 First voice coil bobbin 14 First yoke 15 First magnet 17 1st voice coil 20 2nd vibrating part 21 vibrating member 22 2nd vibrating body 23 2nd voice coil bobbin 24 2nd yoke 24D recess 25 2nd magnet 27 2nd voice coil 60 transmission medium 170th Second damper 177 Second opening 178 Third magnet 179 Fourth magnet

Claims (6)

A first vibrating body having a first yoke and a first magnet provided on the first yoke and internally installed in a frame via a damper,
A second yoke is provided in the frame so as to cover the opening formed in the frame from the inside of the frame, and has a recess recessed toward the inside of the frame, and is installed in the second yoke. A second vibrating body with a second magnet,
A vibrating member installed so as to cover the opening of the frame from the outside of the frame via an edge, and a vibrating member.
One end is attached to the recess of the second yoke to be installed inside the frame, the other end extends to the vicinity of the first vibrating body, and the other end is the first voice coil. The first cylindrical voice coil bobbin provided with
By attaching one end to the edge to which the vibrating member is connected, the other end is installed in the opening of the frame, and the other end extends to the vicinity of the second vibrating body, and the second end is attached to the other end. A second cylindrical voice coil bobbin equipped with a voice coil of
Have,
The frame is installed by vibrating the first vibrating body in response to an acoustic signal flowing through the first voice coil and transmitting the vibration of the first vibrating body to the frame through the damper. The first vibrating part that outputs sound through the transmission medium,
The second vibrating body vibrates in response to the acoustic signal flowing through the second voice coil, and the vibration of the second vibrating body is transmitted to the vibrating member, so that the sound range is higher than that of the first vibrating portion. The second vibrating part that outputs the sound of
Exciter characterized by being equipped with. The exciter according to claim 1, further comprising the metal damper and a second fiber damper connected to the first vibrating body. The frame is
The damper, the first vibrating body, and the second vibrating body are included.
The exciter according to claim 1, wherein the exciter is characterized by the above. The exciter according to any one of claims 1 to 3, wherein the frame is provided with a second opening for closing the second yoke from the inside. The first vibrating body is
A third magnet having the same poles as the first magnet facing each other is provided.
The second vibrating body is
A fourth magnet arranged at a position facing the third magnet is provided.
The third magnet and the fourth magnet are arranged so that the same poles face each other.
The exciter according to any one of claims 1 to 4, wherein the exciter is characterized by the above. The exciter according to any one of claims 1 to 5, wherein the second voice coil bobbin has a length from one end to the other end shorter than that of the first voice coil bobbin.

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