JP2008301038A - Acoustic vibrator and acoustic reproduction apparatus using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily attach an acoustic vibrator to an acoustic reproduction apparatus using the acoustic vibrator. <P>SOLUTION: The acoustic vibrator 10 is constituted of a plurality of flange parts 12 formed on a plurality of positions so as to be projected from a bottom of a cylinder, which is the lower part of the outer periphery of the cylinder, in the peripheral direction and catched and held by fixing claws 15 of a bracket 14 included in a vibration member, which are engaged with the cylinder and rotated relatively with the cylinder to catch and hold the cylinder. By catching and holding the flange parts 12 by the fixing claws 15 of the bracket 14 by engagement and rotation, the attachment of the acoustic vibrator 10 to the vibration member having the bracket 14 can be surely and efficiently performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound exciter that performs sound reproduction by vibrating a panel material, an automobile interior material, a building interior material, and the like, and a sound reproduction device using the same.

  FIG. 7 is a side sectional view of the basic structure of the conventional sound reproducing device, a side sectional view illustrating specific mounting of the acoustic vibrator and the vibration member in FIG. 8, and the acoustic vibrator in FIG. 9 (A). A bottom view of FIG. 1, a side view of FIG. 10B, a bottom view of the bracket on the vibration member side of FIG. 10A, and a side view of FIG.

  The sound reproducing device is composed of an acoustic exciter and a vibrating member. The magnetic circuit and the vibrating body are coupled by a spring-like suspension, and the magnetic circuit and the vibrating body vibrate by attracting and repelling each other. Is generated, and the vibration member equipped with the acoustic exciter is excited and emitted.

  First, an acoustic exciter will be described with reference to FIG. 7. Reference numeral 1 denotes a magnetic circuit, which is composed of a yoke 2, a magnet 3, and a plate 4, and forms a magnetic gap 1a and is coupled to a suspension 5 made of an elastic plate. Yes.

  Reference numeral 6 denotes a vibrating body including a vibration unit 7, a voice coil 8 coupled to the vibration unit 7, and a frame 9 that connects the vibration unit 7 and the suspension 5.

  In the sound exciter of the sound reproducing device configured as described above, when an audio current is passed through the voice coil 8, attraction repulsion occurs between the magnetic circuit 1 and the vibrating body 6 and the magnetic circuit 1 vibrate. Then, a vibration member (not shown) to which the vibration unit 7 is coupled is vibrated and this vibration member is caused to sound.

  Next, with reference to FIGS. 8 to 10B, the configuration of the sound reproducing device in which the acoustic vibrator is mounted on the vibration member will be described.

  Reference numeral 10 denotes an acoustic exciter in which a female screw portion 10b is provided on the bottom portion 10a so as to be attached by screwing to a bracket 11 that is integrally or separately attached to the vibrating member (the outer shape of the acoustic exciter 10). The shape is determined by the frame 9 and the vibration unit 7, but will be described as a part of the acoustic vibrator 10 in the description of individual parts of the prior art from FIG.

  The bracket 11 provided with the male screw portion 11a corresponding to the female screw portion 10b has a screw hole 11b with one end protruding. Another screw hole 10c is also provided in the screw hole 11b and the corresponding bottom portion 10a, and an auxiliary screw 22 is screwed into the screw hole 11b through the other screw hole 10c, and is screwed for acoustic excitation. The device 10 is configured to prevent loosening when mounted on the bracket 11 (vibrating member).

For example, Patent Document 1 is known as prior art document information related to the invention of this application.
Japanese Patent Laid-Open No. 61-21699

  In the sound reproducing apparatus using the conventional acoustic exciter described above, the female screw portion 10b provided on the bottom 10a of the acoustic exciter 10 is screwed into the bracket 11 provided with the male screw portion 11a, and then the auxiliary screw 22 is used. Although the acoustic exciter 10 is prevented from loosening due to screw fixation, these screws are finely pitched to increase the fixing area, and the acoustic exciter 10 and the bracket 11 can be accurately fitted. Otherwise, the screwing would not be successful, and the mounting of the acoustic exciter 10 to the vibrating body was complicated, including the rotating work for screwing and the fastening with the auxiliary screw 22, and had problems in work efficiency.

  In order to solve the above-described problems, an acoustic exciter of the present invention is fitted into the cylinder formed in a plurality of locations by projecting in a circumferential direction from the bottom surface of the cylinder below the outer periphery of the acoustic exciter, and relatively rotated. It is composed of a flange portion that is held and held by a fixing claw of a resin bracket that is mounted on a vibration member that moves and holds.

  The acoustic exciter of the present invention described above is a vibration that projects from the bottom surface of the cylinder below the outer periphery of the acoustic exciter in the circumferential direction and is fitted to the cylinder formed at a plurality of locations, and is relatively rotated and held. The flange portion that is sandwiched and held by the fixing claws provided on the resin bracket mounted on the member facilitates the mounting of the sound exciter to the vibration member and improves the production efficiency of the sound reproducing device. Is something that can be done.

  An embodiment of the present invention will be described below with reference to FIGS. In addition, the same part as a prior art attaches | subjects the same number, and abbreviate | omits description and demonstrates.

(Embodiment 1)
1 is a side sectional view of an acoustic vibrator according to an embodiment of FIG. 1, and a bracket which is a main part of a vibration member constituting the acoustic vibrator and the sound reproducing device of FIG. FIG. 3B is a side view of the frame, which is the main part of FIG. 3A, FIG. 3B is a side view of the frame, and FIG. This will be described with reference to the right side view of FIG. 4B and the side view of the same 90 ° direction of FIG. 4C.

  According to the figure, reference numeral 1 denotes a magnetic circuit, which is formed by bonding a magnet 3 and a plate 4 on a yoke 2, and is made of an elastic metal thin plate on one end side of a frame 9a having openings at both ends. It is connected via the suspension 5.

  Reference numeral 6a denotes a vibration part, and a voice coil 8 having a vibration part 7a and one end adhesively bonded to the vibration part 7a and a coil part 8a disposed in the magnetic gap 1a of the magnetic circuit 1 on the other end side. It is comprised by.

  In the present embodiment, the frame 9a and the vibration portion 7a are integrally formed by resin molding, have an opening for mounting the suspension 5 on the top, and have a bottomed portion provided with a circumferential step. Although the case of the acoustic vibrator is formed, it can be formed separately and integrated by a known means such as adhesion.

  In addition, 7b is a shock absorbing material.

  Next, the mounting of the acoustic vibrator and the vibration member will be described. Reference numeral 10 denotes the acoustic vibrator, and the external appearance is formed by the casing 21 including the frame 9a and the vibrator 7a as described above.

  Reference numeral 12 denotes a flange portion protruding in a circular arc shape in the circumferential direction from the bottom surface of the cylindrical casing 21, and is provided at a plurality of locations. Reference numeral 12a denotes a wall portion provided at one end portion in the circumferential direction of the flange portion 12, and reference numeral 13 denotes a locking portion in which one provided on the outer periphery of the casing 21 has a tapered shape and the other has a substantially standing wall shape. It is a protrusion.

  14 is a resin bracket fixed to a vibration member (not shown), 15 is a fixing claw provided on the bracket 14 corresponding to the flange portion 12, and as shown in FIG. The flange portion 12 is clamped by the fixing claws 15 by being fitted to the housing 21 and rotating the housing 21.

  The flange portion 12 has a tapered portion 12b at the end to be clamped so that the clamping setting with the fixing claw 15 can be easily performed.

  Further, in this state, the protrusion 16a at the tip of the bracket arm 16 extended to one of the fixing claws 15 of the bracket 14 slidably contacts the tapered portion of the locking protrusion 13 to the wall-shaped portion. The state of the flange portion 12 by the fixing claw 15 is not easily released after being dropped (in order to release the holding state of the flange portion 12 by the fixing claw 15, a jig or the like The bracket arm 16 can be easily lifted by rotating the casing 21 in the direction opposite to that at the time of mounting.

  Since the cushioning material 7b is arranged on the bottom surface of the casing 21, play when the acoustic vibrator 10 is mounted on the bracket 14 is absorbed by pressing the cushioning material 7b. The mounting of the acoustic exciter 10 and the bracket 14 can be stably performed not only by the flange portion 12 and the fixing claws 15 but also by the shock absorbing material 7b that eliminates the play of the bottom surface of the acoustic exciter 10 and the bracket 14. Is.

  As described above, the acoustic vibrator is easily attached to the vibration member by holding the flange portion 12 provided on the casing 21 of the acoustic vibrator with the fixing claws 15 of the bracket 14 provided on the vibration member side. In addition, the projection 16a provided on the bracket arm 16 and the locking projection 13 can provide a highly reliable mounting structure that is not easily released.

(Embodiment 2)
Hereinafter, another embodiment of the acoustic vibrator of the present invention will be described with reference to a bottom view of a casing, which is a main part of the acoustic vibrator of FIG. 5A, and a side view of FIG. .

  According to the figure, the difference from the acoustic vibrator of the first embodiment is that a minute hemispherical projection 17 is provided between the locking projection 13 and another flange portion 12c. When the projection 17 is rotated to release it from the mounted state of the acoustic vibrator, the projection 16a at the tip of the bracket arm 16 gets over the projection 17 and gives a light click feeling to the operator. The vibration removal position can be easily confirmed as a touch, and it is possible to prevent damage to the bracket arm 16 due to excessive rotation when removing the acoustic vibration exciter.

  Therefore, when the acoustic exciter 10 is mounted on the bracket 14 of the vibration member, the protrusion 17 obtains a click feeling when the protrusion 16a of the bracket arm 16 gets over the protrusion 17 by the protrusion 17, and further rotates. It moves and gets over the locking projection 13 to be mounted.

  In the present embodiment, the protrusion 17 is provided in order to obtain a click feeling. However, in place of the protrusion 17, a recess having a degree of clicking feeling may be formed.

(Embodiment 3)
Hereinafter, another embodiment of the acoustic vibrator of the present invention will be described with reference to the sectional side view of FIG.

  The present embodiment will be described focusing on the differences from the first embodiment. The difference is that, in the internal structure of the acoustic exciter, the frame and the exciter are coupled with an elastic body. .

  In other words, as shown in the figure, 18 is a cylindrical frame formed by resin molding, 19 is a vibrating portion formed by bottomed cylindrical resin molding, and 20 is the frame 18 and the above-described added force. It is a ring-shaped elastic body formed slightly wider than the gap of the vibration part 19.

  The vibrating portion 19 is coupled (mounted / held) to the frame 18 by the pressure contact of the elastic body to the frame 18 and the vibrating portion 19 due to the elastic force of the ring-shaped elastic body 20.

  In order to securely and stably hold and hold the elastic body 20, a concave groove portion 18a is formed on the entire inner periphery of the frame 18, and a concave groove portion 19a is formed on the entire outer periphery of the vibration portion 19. Is formed.

  With the above configuration, the vibration unit 19 vibrates substantially independently of the frame 18, which is equivalent to having a light vibration mass and the vibration speed of the vibration unit 19 is improved and the vibration efficiency is improved. Sound reproduction with an acoustic reproduction device constructed by mounting this acoustic exciter on a vibration member (not shown) can be improved, the high-frequency vibration can be improved, and the reproduction band can be improved. It is possible to provide a device.

  Furthermore, in the acoustic exciter of the present embodiment, the flange portion 12 of the acoustic exciter is fitted into the bracket 14 installed on the vibration member in the same manner as the acoustic exciter of the first embodiment, and is rotated. An acoustic exciter can be easily attached to the vibration member to facilitate assembly of the sound reproducing device, and it is possible to provide a sound reproducing device that is excellent in productivity and excellent in acoustic characteristics.

  Note that the elastic body 20 of the present embodiment is preferably a material having stable physical properties and high heat resistance in consideration of environmental resistance. For example, a silicon rubber type may be considered, but the rubber hardness including the silicon type rubber may be used. It can be selected within 20 ° to 60 °.

  The elastic body 20 can be made of an adhesive having elasticity even after being cured, and the elastic body can be formed by applying or filling the adhesive between the frame 18 and the vibrating portion 19. is there. As such an adhesive, it has an appropriate viscosity and is excellent in stable physical properties and heat resistance. As such an adhesive, for example, it is effective to use a silicon rubber-based adhesive, and an elastic body as a solid. Compared with, material cost reduction can be expected.

  The acoustic exciter of the present invention can be easily combined with a vibrating member and used widely in on-vehicle and residential sound reproducing apparatuses that use a flat panel speaker, a ceiling or a wall as a sounding body. Is.

1 is a side sectional view of an acoustic exciter according to an embodiment of the present invention. Side sectional view explaining mounting | wearing with the bracket which is the principal part of the vibration member which comprises the same acoustic vibrator and sound reproduction apparatus (A) Bottom view of the main part of the frame, (B) Side view (A) Top view of the main part of the bracket, (B) Right side view, (C) Side view from 90 ° different direction (A) Bottom view of a housing of an acoustic exciter that is a main part of the other embodiment, (B) Side view Side sectional view of an acoustic exciter according to another embodiment Side sectional view of the basic structure of a conventional acoustic vibrator Side sectional view explaining specific mounting with bracket mounted on vibration member forming the sound reproducing device (A) Bottom view of the frame which is the main part of the acoustic vibrator, (B) Side view (A) Bottom view of the bracket, (B) Side view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic circuit 2 Yoke 3 Magnet 4 Plate 5 Suspension 6a Vibrating part 7a, 19 Exciting part 8 Voice coil 9a Frame 10 Acoustic exciter 12 Flange part 13 Locking protrusion 14 Bracket 15 Fixing claw 16 Bracket arm 16a Protrusion 20 Elasticity body

Claims (5)

An acoustic exciter that is attached to a vibration member and generates a sound by vibrating the vibration member by the vibration, and is formed at a plurality of locations by projecting in a circumferential direction from the cylindrical bottom surface of the acoustic vibration exciter, and is fitted to the cylinder An acoustic exciter comprising a flange portion that is sandwiched and held by a fixing bracket of a resin bracket provided on the vibration member that is relatively rotated and held. An arm part extending on the circumference is provided on the upper part of the fixing claw of the bracket, and a protrusion is provided inwardly at the tip of the arm, and one side of the outer wall of the acoustic exciter is tapered. And the other side is provided with a locking protrusion which is substantially a wall, and when the arm is turned to hold the flange portion with the bracket fixing claw, the protrusion at the end of the arm slides on the tapered locking protrusion. The acoustic exciter according to claim 1, wherein the acoustic exciter is configured to be in contact with and dropped into the upright wall side. An acoustic exciter having a protrusion or recess for confirming the attachment / detachment position at which the protrusion at the end of the arm can easily ride up in a rotational direction for slightly pinching from the protrusion position at the end of the arm of the bracket at least at the insertion position to the flange portion of the bracket The acoustic exciter according to claim 2 provided on the outer peripheral wall of the step. The acoustic exciter according to claim 1, 2 or 3, wherein the acoustic exciter includes a magnetic circuit, a suspension coupled to the magnetic circuit, and a frame coupled to the suspension. An acoustic exciter composed of a voice coil having the other end side coupled to the excitation unit so that one end side is disposed in the magnetic gap of the magnetic circuit, and an elastic body coupling the excitation unit and the frame . The acoustic exciter according to claim 1 or claim 2 or claim 3 or claim 4 and a bracket provided so as to sandwich and mount the flange portion of the acoustic exciter are integrated or separated. A sound reproducing device composed of a vibrating member mounted as an object.

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