JP2005323096A - Speaker unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker unit whose magnetic circuit is assembled with efficiency and easy to disassemble, and for which such environmental measures that magnetic circuit constituent components are easily recycled or sorted and disposed of are taken. <P>SOLUTION: A top plate 5, a magnet 6, and a yoke 7 are bundled and fixed by using a bundling band 9 which can be cut to constitute the magnetic circuit of the speaker unit. Grooves 52 and 75 for locking the bundling band 9 are formed on the top surface of the top plate 5 and the reverse surface of a bottom plate 6 of the yoke 6. When the magnetic circuit is disassembled, the bundling band 9 is cut by using a tool such as a nipper. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker unit, and more particularly to a speaker unit that facilitates assembly and disassembly of a magnetic circuit.

  In general, the magnetic circuit of the outer magnet type speaker unit is composed of a top plate 1, a magnet 2 and a yoke 3, as shown in FIG.

  The magnetic circuit of FIG. 6 includes a yoke 3 having a center pole 32 provided vertically at the center of the upper surface of the bottom plate 31, a ring-shaped magnet 2 placed on the bottom plate 31 of the yoke 3, and a magnet 2. And a disc-shaped top plate 1 provided on the upper surface of the plate. Further, this magnetic circuit is integrally bonded and fixed between the top plate 1, the magnet 2 and the yoke 3 by mainly interposing an acrylic adhesive 4.

  By the way, in recent years, environmental issues have been regarded as important, and recycling technology and recycling-compatible products have been proposed in all fields. However, the same applies to speaker units, which makes it easy to disassemble magnetic circuit components and make magnetic circuit configurations. There is a demand for a speaker unit suitable for reusing parts or separating waste.

  However, since the magnetic circuit of the speaker unit shown in FIG. 6 is bonded and fixed using the adhesive 4, the magnetic circuit member must be heated to disassemble the top plate 1, the magnet 2, and the yoke 3. Therefore, it was necessary to degrade the adhesive 4 in advance. Generally, the entire speaker unit is put in an oven and heat-treated, and thereafter, the bonded portion deteriorated by applying an impact force to the heated speaker unit with a hammer or the like is divided and disassembled.

  This disassembly process requires a large amount of thermal energy and impact force (kinetic energy), and the stronger the adhesive bonding of the magnetic circuit, the more time is required for the disassembly process, and sometimes damages the components that make up the magnetic circuit. In some cases, however, it cannot be reused. Further, even after the decomposition treatment, the adhesive 4 is adhered to the top plate 1, the magnet 2 and the yoke 3, respectively, and thus there is a problem that the recycling process is adversely affected.

  In order to solve various problems in the magnetic circuit in which the top plate, the magnet and the yoke are bonded and fixed using the adhesive as described above, the following methods have been proposed. As one of the methods, there has been proposed a method of constructing a magnetic circuit by connecting and fixing a top plate, a magnet and a yoke using a rivet made of a nonmagnetic material (see, for example, Patent Document 1).

  In addition, a bar-shaped coupling component made of a non-magnetic material is passed through holes provided in the top plate, the magnet, and the yoke that constitute the inner magnet type magnetic circuit, and the projection of the coupling component protruding from the top plate or the yoke is provided. A method of crimping and joining three parts by pressure bonding has been proposed (for example, see Patent Document 2).

  Further, the magnetic circuit composed of the top plate, the magnet, and the yoke is accommodated in a bottomed cover member made of a resin material, and the cover member is press-fitted to the frame so that the magnetic circuit is bonded to an adhesive or the like. There has been proposed a method of fixing between a cover member and a frame without using (see, for example, Patent Document 3).

  Further, a speaker unit is configured in which a frame, a top plate of a magnetic circuit, a magnet, and a yoke are fastened by a fastening member made of a shape memory alloy, and the speaker unit has a shape recovery temperature or higher and an irreversible demagnetization temperature or higher A method has been proposed in which the frame and the magnetic circuit components are released from each other by heating to a temperature of 1 to allow disassembly (see, for example, Patent Document 4).

JP 2001-177894 A (page 2-3, FIG. 1) JP 2001-245387 A (page 5-10, FIG. 1) JP 2001-309488 A (page 2-5, FIG. 1) JP 2004-48426 A (page 2-7, FIG. 1)

  In the conventional speaker unit described above, the method of connecting and fixing the top plate, the magnet, and the yoke using the rivet to form the magnetic circuit is possible because the rivet needs to be cut with a tool such as a nipper during the disassembly process. There is a problem that the range is limited to a small-diameter speaker unit.

  In addition, the method using this rivet employs a method in which one end of the rivet is caulked and the inner diameter portion of the top plate is coupled and fixed by a compressive force. In order to be able to do so, it is necessary to manufacture the rivet itself using a relatively soft member, so that a large compressive force cannot be obtained, and there is a high possibility that a mutual positional shift of the bonded and fixed magnetic circuit will occur. There was a problem.

  Also, the method of constructing a magnetic circuit by crimping and fixing the top plate, the magnet, and the yoke by crimping the protruding portion using a rod-shaped connecting part is difficult with a general tool to release the crimped portion. There was a problem. In addition, this proposed method has a problem in that it cannot be performed except for the internal magnetic type magnetic circuit because it is necessary to provide a hole for inserting the coupling component in the center of the magnetic circuit.

Furthermore, the method of housing the magnetic circuit in a cover member made of a resin material and fixing the magnetic circuit between the cover member and the frame uses a cover member made of a large resin material that wraps the entire magnetic circuit. , There was a drawback that led to cost increase. Further, when performing the disassembling process, there is a problem that the cover member made of the resin material must be destroyed by some method, and the disposal process cannot be easily performed.

  In addition, the method of fastening and fixing the frame and each component constituting the magnetic circuit using a fastening member made of a shape memory alloy requires that the fastening member be manufactured using a special material called a shape memory alloy, which is costly. It is also disadvantageous. Furthermore, the decomposition process requires a work process for performing a heat treatment, which is troublesome and expensive.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to provide an environmental measure in which the assembly efficiency of the magnetic circuit is good, the disassembly process is easy, and the magnetic circuit components are easily reused or separated and discarded. The object is to provide a speaker unit.

  In order to achieve the above object, in the speaker unit of the present invention, the top plate, the magnet, and the yoke are bound and fixed using a binding band that can be cut to constitute a magnetic circuit.

  Further, it is effective to provide a groove for locking the binding band on the upper surface of the top plate and the lower surface of the bottom plate of the yoke.

  It is also effective to provide holes for inserting the binding band in the top plate, magnet and yoke constituting the magnetic circuit.

  In addition, a notch is provided around the magnets that make up the magnetic circuit, and the top plate, magnet, and yoke are bound and fixed to the notch through a binding band. The top plate, the magnet, and the yoke can be positioned.

  Further, it is effective to bind and fix the frame, the top plate, the magnet and the yoke constituting the magnetic circuit together using the severable binding band.

  It is also possible to provide holes for inserting the binding band in the frame, top plate, magnet and yoke constituting the magnetic circuit, respectively, and to bind and fix the frame and the magnetic circuit integrally with the binding band inserted through the hole. it can.

  The speaker unit of the present invention can provide a speaker unit that has high efficiency in assembling a magnetic circuit, is easy to disassemble, and has environmental measures that facilitate the reuse and separation and disposal of magnetic circuit components.

  The top plate, the magnet, and the yoke are bound and fixed using a binding band that can be cut, and the magnetic circuit of the speaker unit is configured.

A first embodiment of a speaker unit according to the present invention will be described with reference to FIGS.
FIG. 1A is a half-sectional view showing a magnetic circuit of the speaker unit. FIG. 1B is a plan view of the magnetic circuit. (A) of FIG. 2 is a perspective view which shows each component which comprises a magnetic circuit. FIG. 2B is a perspective view showing a state immediately before the components constituting the magnetic circuit are bound and fixed using the binding band.

  As shown in FIGS. 1A and 1B and FIGS. 2A and 2B, the speaker unit according to the first embodiment is an outer unit composed of a top plate 5, a magnet 6 and a yoke 7. As shown in FIGS. The magnetic type magnetic circuit is configured as follows.

  First, the yoke 7 has a center pole 72 provided vertically at the center of the upper surface of the bottom plate 71. A ring-shaped guide step 73 having an outer diameter larger than the outer diameter of the center pole 72 is formed on the outer periphery of the base end of the center pole 72.

  The ring-shaped magnet 6 has an inner diameter substantially equal to the outer diameter of the guide step portion 73 and is configured to fit into the guide step portion 73 and to be centered when placed on the upper surface of the bottom plate 71. doing. Furthermore, when the magnet 6 is placed on the upper surface of the bottom plate 71, the attachment positional relationship is defined by a plurality of positioning bosses 74 formed so as to protrude upward from the outer peripheral edge of the bottom plate 71. It is composed.

  The top plate 5 is made of a ring body having a required diameter and thickness, and has a plurality of positioning bosses 51 formed to protrude downward on the outer edge. The boss 51 defines the positional relationship between the outer peripheral surface of the center pole 72 and the inner peripheral surface of the top plate 5 when the top plate 5 is placed on the upper surface of the magnet 6, and forms the magnetic gap 8. A magnetic circuit is configured.

  Furthermore, a groove 52 for locking the severable binding band 9 is provided on the top surface of the top plate 5 configured as described above. The groove 52 is provided in parallel at a symmetrical position across a circular hole 53 formed at the center of the top plate 5.

  On the other hand, on the lower surface of the bottom plate 71 of the yoke 7 configured as described above, two grooves 75 for locking the binding band 9 are respectively provided at positions corresponding to the two grooves 52 provided on the top plate 5. Provided.

  According to the first embodiment, as shown in FIG. 2A, the top plate 5, the magnet 6 and the yoke 7 are arranged and stacked, and then, as shown in FIG. As shown in FIGS. 1 (a) and 1 (b), the binding band 9 is hung on the groove 52 of the top plate 5 and the groove 75 of the bottom plate 71 to give a tension, and as shown in FIGS. A uniform compressive force acts on the yoke 7 and the top plate 5, the magnet 6 and the yoke 7 are completely bound and fixed. As a method of applying tension to the binding band 9, the binding band 9 may be strongly pulled or bound, or the binding band 9 itself may be contracted.

  Thus, in the first embodiment, the top plate 5, the magnet 6 and the yoke 7 are bound and fixed by the binding band 9 without using an adhesive as in the prior art, and the magnetic circuit is configured. Impurities such as adhesives do not adhere to each component to be recycled. Compared to the conventional method of fixing with a local force such as rivet or caulking, a compressive force is applied to the entire parts constituting the magnetic circuit, so that the magnetic circuit can be stably coupled and fixed. Assembling efficiency can be improved. Moreover, since only the binding band 9 is used for fixing the magnetic circuit, it is advantageous in terms of cost.

Next, a method for disassembling the magnetic circuit of the assembled speaker unit will be described with reference to FIGS.
When disassembling the magnetic circuit of the speaker unit, the magnetic circuit can be easily disassembled by cutting the two binding bands 9 with a tool such as a nipper, and the magnetic circuit can be reused or disposed of separately. It can be done easily.

  A second embodiment of the speaker unit according to the present invention will be described with reference to FIGS. (A) of FIG. 3 is a perspective view which shows each component which comprises the magnetic circuit of a speaker unit. FIG. 3B is a perspective view showing a state immediately before the components constituting the magnetic circuit are bound and fixed using the binding band. FIG. 3C is a plan view of the magnetic circuit. FIG. 3D is a half-sectional view showing a magnetic circuit. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description of common parts is omitted since it is duplicated. The same applies to the third and fourth embodiments described below.

  The speaker unit of the second embodiment is provided with holes 54a to 54d, holes 61a to 61d, and holes 76a to 76d for inserting the binding band 9 into the top plate 5, the magnet 6 and the yoke 7 constituting the magnetic circuit. It is characterized by that.

  The four holes 54a to 54d for inserting the binding band 9 provided in the top plate 5 are provided in two symmetrical positions across the circular hole 53 formed in the center of the top plate 5. .

  Further, the four holes 61a to 61d for inserting the binding band 9 provided in the magnet 6 are symmetric with respect to the circular hole 62 formed in the center, and the four holes of the top plate 5 are provided. It is provided at a position facing each of the holes 54a to 54d.

  Further, the four holes 76a to 76d provided in the bottom plate 71 of the yoke 7 are symmetrical positions with the center pole 72 interposed therebetween, and the four holes 54a to 54d of the top plate 5 and the four magnets 6 are provided. The holes 61a to 61d are provided at positions facing each other.

  In this way, four holes 54a to 54d, 61a to 61d and 76a to 76d provided in the top plate 5, the magnet 6 and the bottom plate 71 of the yoke 7 respectively overlap the top plate 5, the magnet 6 and the yoke 7. When the magnetic circuit is assembled, four sets of holes 54a, 61a, 76a, holes 54b, 61b, 76b, holes 54c, 61c, 76c, and holes 54d, 61d, 76d are formed. The

  As shown in FIG. 3 (b), the four sets of holes 54a, 61a, 76a, holes 54b, 61b, 76b, holes 54c, 61c, 76c and holes 54d, 61d, 76d in the penetrated state are When both ends of the binding band 9 are inserted and bound by applying tension, a uniform compressive force acts on the top plate 5, the magnet 6 and the yoke 7, and as shown in FIG. The three parts of the plate 5, the magnet 6 and the yoke 7 are completely bound and fixed to constitute a magnetic circuit. As a method for applying tension to the binding band 9, as in the case of the first embodiment, the binding band 9 may be strongly pulled or bound, or the binding band 9 itself may be contracted.

  According to the second embodiment, in addition to the effects described in the first embodiment, holes 54a to 54d, 61a to 61d and 76a to 76a provided in the bottom plate 71 of the top plate 5, the magnet 6 and the yoke 7 are provided. The fixing position is uniquely determined by inserting the binding band 9 into 76d and fixing the three parts together, so that a positioning guide or the like is not particularly required. Further, by adopting the structure shown in the second embodiment, it can be applied to the magnetic circuit of the internal magnet type speaker unit.

  Further, when disassembling the magnetic circuit of the speaker unit of the second embodiment, the magnetic circuit can be easily disassembled by cutting the two binding bands 9 with a tool such as a nipper, It is possible to easily reuse or separate the magnetic circuit.

  Next, a third embodiment of the speaker unit according to the present invention will be described with reference to FIGS. FIG. 4A is a perspective view showing each part constituting the magnetic circuit of the speaker unit. FIG. 4B is a plan view of the magnetic circuit.

  The speaker unit of the third embodiment is characterized in that notches 63 are provided at the four corners of the magnet 6 among the components constituting the magnetic circuit.

  As described above, by providing the notches 63 at the four corners of the magnet 6, the binding band 9 can be formed in the groove of the top plate 5 even when the magnetic circuit is configured using the magnet 6 larger than the top plate 5 and the yoke 7. 52 and a groove 75 provided in the bottom plate 71 of the yoke 7 without being bent, and a uniform compressive force is applied to the top plate 5, the magnet 6 and the yoke 7. This makes it possible to secure the binding. Furthermore, by passing the binding band 9 through the notches 63 provided at the four corners of the magnet 6, the top plate 5, the magnet 6, and the yoke 7 can be fixed at the specified positions.

  Further, when disassembling the magnetic circuit of the speaker unit of the third embodiment, the magnetic circuit can be easily disassembled by cutting the two binding bands 9 with a tool such as a nipper, It is possible to easily reuse or separate the magnetic circuit.

  A fourth embodiment of the speaker unit according to the present invention will be described with reference to FIG. FIG. 5 is a half-sectional view of the speaker unit frame and magnetic circuit.

  The fourth embodiment is characterized in that the frame 10 of the speaker unit, the top plate 5 constituting the magnetic circuit, the magnet 6 and the yoke 7 are integrally bound and fixed using a binding band 9. .

  In the fourth embodiment, the base 101 of the frame 10 is provided with a concave locking portion 102 protruding downward. Further, a concave engaging portion 55 that can receive the engaging portion 102 of the frame 10 is provided on the top surface of the top plate 5. Further, a hole for inserting the binding band 9 is provided in the locking portion 102 of the frame 10, and holes are provided in the top plate 5, the magnet 6, and the yoke 7 constituting the magnetic circuit, respectively. A through-hole for insertion is formed. The binding band 9 can be inserted into the through-hole, and the frame 10, the top plate 5, the magnet 6 and the yoke 7 constituting the magnetic circuit can be integrally bound and fixed.

  Further, when disassembling the frame 10 of the speaker unit of the fourth embodiment, the top plate 5, the magnet 6 and the yoke 7 constituting the magnetic circuit, the binding band 9 is cut using a tool such as a nipper. Thus, the magnetic circuit can be easily disassembled, and the top plate 5, the magnet 6 and the yoke 7 constituting the frame 10 or the magnetic circuit can be easily reused or disposed of separately. Furthermore, according to the fourth embodiment, since it is not necessary to bond and fix the frame 10 to the upper surface of the top plate 5 of the magnetic circuit with an adhesive, it is possible to provide a speaker unit that can be easily disassembled and is suitable for recycling. It becomes possible.

FIG. 2 is a half-sectional view and a plan view of a magnetic circuit portion showing a first embodiment of a speaker unit according to the present invention. It is a perspective view of the magnetic circuit part which shows the 1st Example of the speaker unit based on this invention. It is a structure explanatory drawing which shows the 2nd Example of the speaker unit which concerns on this invention. It is the perspective view and top view which show the 3rd Example of the speaker unit based on this invention. FIG. 6 is a half-sectional view of a frame and a magnetic circuit portion showing a fourth embodiment of the speaker unit according to the present invention. It is a perspective view which shows the magnetic circuit of the conventional speaker unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate 2 Magnet 3 Yoke 31 Bottom plate 32 Center pole 4 Adhesive 5 Top plate 51 Boss 52 Groove 53 Hole 54a-54d Hole 55 Engagement part 6 Magnet 61a-61d Hole 62 Hole 63 Notch 7 Yoke 71 Bottom plate 72 Center pole 73 Guide step part 74 Boss 75 Groove 76a-76d Hole 8 Magnetic gap 9 Binding band 10 Frame 101 Base 102 Locking part

Claims (6)

  A speaker unit comprising a magnetic circuit formed by binding and fixing a top plate, a magnet, and a yoke using a binding band capable of cutting.   The speaker unit according to claim 1, wherein a groove for locking the binding band is provided on the upper surface of the top plate and the lower surface of the bottom plate of the yoke.   3. The speaker unit according to claim 1, wherein holes for inserting the binding band are provided in the top plate, the magnet, and the yoke, respectively.   A notch is provided around the magnets that make up the magnetic circuit, and the top plate, magnet, and yoke are bound and fixed through the binding band to the notch, and the top plate is simultaneously fixed. 3. The speaker unit according to claim 1, wherein positioning between the magnet and the yoke is performed.   A speaker unit characterized in that a frame, a top plate constituting a magnetic circuit, a magnet, and a yoke are integrally bound and fixed using a cuttable binding band.   6. The speaker unit according to claim 5, wherein a hole for inserting the binding band is provided in each of the frame, the top plate, the magnet and the yoke constituting the magnetic circuit.

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