JPH053596A - Speaker - Google Patents

Abstract

PURPOSE:To offer the speaker with less assemblies connecting a tweeter and its holder and good in quality without generating an abnormal sound caused by the dropping and the resonance of the tweeter. CONSTITUTION:On the upper surface of a holder 44, pawls 45 the sectional form of which is an inverse L shape are arranged in opposition. A projection 46 is provided on the hook of this pawl 45, and a tweeter 1 is embedded on the pawl 45 so as to make a mechanical combination. The projection 46 presses the tweeter 1 downward to suppress vibration. Thus the speaker with superior quality generating no resonance sound can be realized by an easy means, resulting in cost reduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in audio equipment such as automobiles.

[0002]

2. Description of the Related Art Recently, in automobiles, in order to improve the acoustic performance in a vehicle compartment, a composite type speaker in which a tweeter is incorporated in a woofer has been widely used. Further, in order to arrange the speaker in an appropriate direction with respect to the listener, the number of speakers with a bracket for mounting the speaker on the vehicle body via the bracket has been rapidly increasing.

A speaker called a composite type using a conventional resin molded product holder will be described below with reference to the drawings.

FIG. 7 is a perspective view showing a state before a tweeter and a holder of a conventional speaker are attached to a woofer. In FIG. 7, reference numeral 1 denotes a tweeter, to which a capacitor 2 is fixedly connected to the side surface. This tweeter 1 is screwed to a resin-molded holder 4 using a self-tapping screw 3, and the bottom of the holder 4 is inserted from above the voice coil 6 of the woofer 5 and the screw 8 is inserted from the bottom surface of the lower plate 7. Are combined using.

A cylindrical urethane foam called a dustproof cushion 9 is attached to the lower portion of the holder 4, and the lower surface of the dustproof cushion 9 is attached to the diaphragm 10 of the woofer 5. The vibrating plate 10 has a peripheral edge portion fixed to the frame 11 and a central portion connected to the voice coil 6, and lead wires of the voice coil 6 are referred to as gold thread lines 12 and 13 on the surface of the vibrating plate 10. Each is connected to a conductive wire. One end of the gold thread wires 12 and 13 is connected to the terminals 15 and 16 of the terminal plate 14 coupled to the frame 11, and the other end is connected to the woofer 5 and the tweeter 1 in parallel via the capacitor 2 so that the tweeter 1 Are connected to the terminals 17 and 18 by soldering.

Next, the cross-sectional structure of this speaker will be described. FIG. 8 is a structural cross-sectional view of this conventional speaker. In FIG. 8, a magnetic circuit 22 is constituted by a lower plate 7 having a center pole 19, a ring-shaped magnet 20, and a ring-shaped upper plate 21, and the frame 11 is coupled to the upper surface thereof.

In addition, the lower part of the voice coil 6 is properly fitted into the magnetic gap 23 of the magnetic circuit 22,
The suspension 24 holds the middle portion of the voice coil 6 and is fixed to the frame 11, the peripheral edge of the diaphragm 10 is attached to the frame 11 together with the gasket 25, and the central portion of the diaphragm 10 is joined to the upper portion of the voice coil 6. The woofer 5 is constructed.

Next, the tweeter 1 will be described. Inside the yoke 26, a cylindrical magnet 27 and a cylindrical plate 28 form a magnetic circuit, and a housing 29 is fixed to the outside of the magnetic circuit. further,
A voice coil 31 is coupled below the diaphragm 30, and the lower portion of the voice coil 31 is correctly fitted in the magnetic gap 32. Further, an equalizer 33 is arranged above the diaphragm 30 to form the tweeter 1.

The tweeter 1 is connected to a holder 4 made of a resin molded product by a self-tapping screw 3, and a nut 34 preliminarily mounted inside the holder 4 has a screw 8 inserted from the bottom surface of the lower plate 7 of the woofer 5. The holder 4 is joined by being tightened by. Further, the upper and lower surfaces of the cylindrical dustproof cushion 9 are attached between the holder 4 and the diaphragm 10 to form a speaker.

The operation of the speaker configured as described above will be described below. First, when an input signal is applied from the terminals 15 and 16 of the woofer 5, the voice coil 6 moves up and down according to the left hand rule of colleming, and this force causes the diaphragm 10 to vibrate and emit sound into the air. Further, the high frequency component of the input signal passes through the capacitor 2 and is supplied to the voice coil 31 of the tweeter 1, and similarly the diaphragm 30 vibrates and radiates a high sound into the air.

Next, another conventional example will be described. FIG. 9 is a perspective view showing a speaker in which another conventional bracket is interposed. In FIG. 9, reference numeral 35 is a tweeter, which is a dome type tweeter. A capacitor 36 is fixed to the side surface of the tweeter 35, and a bracket 37 made of a resin molded product and the tweeter 35 are connected by a self-tapping screw 38.

The terminals 39 and 40 have lead wires 41,
42 is connected, and the connector 43 is connected and coupled to the other ends of the lead wires 41, 42. The bracket 37
Is used for mounting on the body of an automobile, and is not directly related to the function of the speaker.

The operation of the speaker configured as described above will be described below. First, when an input signal is applied to the connector 43, its high-frequency component passes through the capacitor 36 and enters the voice coil, and the diaphragm of the tweeter 35 vibrates to emit a high sound into the air. .

Further, in order to connect the tweeter 1 and the holder 4 of the conventional loudspeaker shown in FIGS. 7 and 8 without using the self-tapping screw 3, only the adhesive is fixed, and FIG. 9 is also shown. There is also a speaker in which the bracket 37 and the tweeter 35 shown are fixed only by adhesion.

[0015]

However, in the above-described conventional speaker configuration, it takes a lot of man-hours to screw the tweeter 1 and the holder 4 with the self-tapping screw 3 and the manufacturing cost is increased. Furthermore, if a general-purpose iron screw is used as the self-tapping screw 3, the self-tapping screw 3 is attracted to the magnetic gap 32 of the tweeter 1 during the screwing work, and the diaphragm 30 is damaged. For this reason, the self-tapping screw 3 must be made of non-ferrous metal such as stainless steel, which is a special order product, which increases the cost and makes procurement difficult.

On the other hand, in the structure in which the tweeter 1 and the holder 4 are fixed to each other only by adhesion, the assembly cannot be moved until the adhesive is dried and hardened, so that the assembly is troublesome and the amount of the adhesive applied is small. There is also a quality problem that the tweeter 1 comes off the holder 4 due to such reasons.

Apart from this, the same applies to the case of the speaker having the bracket described in the other conventional example, which requires a lot of man-hours for screwing work, and it is difficult to procure the non-ferrous metal self-tapping screw 38. There is a quality problem that the tweeter 35 is disengaged from the bracket 37 in the case of only fixing by adhesion.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned conventional problems, and an object thereof is to provide a speaker which does not use a self-tapping screw, has a small number of assembling steps, and has a tweeter which does not fall off.

[0019]

In order to solve this problem, the speaker of the present invention has a holder connected to the magnetic circuit of the woofer so that the upper surface for connecting the tweeter is arranged on the front surface of the woofer. At the end of the upper surface part, a claw having an inverted L-shaped cross section is provided so as to face each other, and a hooking surface is provided with a convex projection, and a tweeter is fitted into this claw to be coupled. is there.

[0020]

With this structure, the claws provided on the holder are hooked on the tweeter housing and mechanically connected, so that screwing by the self-tapping screw is not necessary. Furthermore, the convex projection provided on the hooking surface of the claw can press the housing of the tweeter downward to prevent the tweeter from resonating with the holder.

[0021]

EXAMPLE 1 An example of the present invention will be described below with reference to the drawings. The same parts as those described in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a perspective view showing a state before a tweeter and a holder of a speaker in a first embodiment of the present invention are attached to a woofer. In FIG. 1, a claw 45 having an inverted L-shaped cross section is formed on the upper surface of a holder 44 made of a resin molded product.
Are arranged so as to face each other, a convex projection 46 is provided on the catching surface of the claw 45, and the tweeter 1 to which the capacitor 2 is fixed is fitted into the claw 45 and coupled with the holder 44. The above is the difference from the conventional example.

Next, the bottom portion of the holder 44 is inserted from above the voice coil 6 of the woofer 5, and the lower plate 7
The holder 44 is coupled with the screw 8 from the bottom surface of the. A dustproof cushion 9 is bonded between the lower portion of the holder 44 and the diaphragm 10. The peripheral edge of the diaphragm 10 is fixed to the frame 11 and the central portion is connected to the voice coil 6. The lead wire of the voice coil 6 is connected to the gold thread wires 12 and 13, and one end of the gold thread wires 12 and 13 is fixed to the terminal plate 14 by a terminal 15,
16 and the other end is connected to the terminals 17 and 18 of the tweeter 1.

Next, a state in which the tweeter 1 is combined with the holder 44 will be described. FIG. 2 is a partial perspective view showing a state in which the tweeter 1 of the speaker in the first embodiment of the present invention is connected to the holder 44. In FIG.
A claw 45 on the upper surface of the holder 44 holds the tweeter 1 and mechanically couples it, and a protrusion 46 holds the tweeter 1 downward.

Next, the shape of the claw 45 will be described. FIG. 3 is an enlarged perspective view of the claw 45. In the figure, the hook 4 of the claw 45 has a semicircular cross section
6 is provided. Further, an inclined surface 47 and a rounded portion 48 are formed at the tip end thereof so that the tweeter 1 can be fitted easily.
In other words, with this structure, the tweeter 1 can be coupled to the holder 44 simply by fitting it into the claw 45, and since the protrusion 46 presses the tweeter 1 downward, the tweeter 1 does not vibrate, and the holder 44 and Resonance noise is not generated between the two, and the quality can be improved.

Further, the protrusion 46 provided on the hooking surface of the claw 45 will be described. FIG. 4 is a sectional view around the claw 45. When there is no protrusion 46, in order to suppress the rattling between the tweeter 1 and the claw 45, the catching surface 4 of the claw 45 is used.
The gap A between 9 and the receiving surface 50 is narrowed. However, in this case, if the gap A is finished small or the tweeter 1 housing is finished large due to variations such as resin molding, the dimension variations cannot be absorbed and the tweeter 1 is forcibly pushed into the claw 45. It will break from the root of the claw 45.

On the contrary, if the gap A is finished large, the tweeter 1 cannot be pressed down, the tweeter 1 vibrates, and a resonance sound is generated with the holder 44. The protrusion 46 effectively works to absorb these dimensional variations. That is, since the contact area that presses the housing of the tweeter 1 is small, even if it hits hard, the projection 46 is easily crushed and the entire tab 45 is deformed, so that the tab 45 can be prevented from being broken from the root. Further, in order to press the housing of the tweeter 1, it is sufficient that the upper surface of the housing of the tweeter 1 is substantially within the range of the height of the protrusion 46, and there is a sufficient dimensional margin.

Next, the shape of the protrusion 46 will be described. Although the protrusion 46 having a semicircular cross section is used in FIG. 4, the protrusion has a wedge shape as shown in FIG. 5A or a trapezoidal shape as shown in FIG. 5B. May be.

Further, the resin material forming the holder 44 will be described. Since the holder 44 is in contact with the center pole 19 of the woofer 5 and the housing of the tweeter 1, it is preferable to use glass fiber-blended ABS resin or the like, which is less likely to cause dimensional changes due to temperature changes. Also tweeter 1
It is preferable to use the same material as the housing of.

The structural cross section of the speaker of the present invention has a tab 4 on the upper portion of the holder 4 having the same structural cross section described in the conventional example.
The configuration is such that the self-tapping screw 3 is removed by adding No. 5, and since there are few differences, the drawing and its description are omitted.

The operation of the speaker configured as described above is similar to that of the speaker described in the conventional example, and the terminal 1
When an input signal is applied from 5 and 16, the voice coil 6 moves, and the vibrating plate 10 vibrates by this force to emit sound into the air. Further, the high frequency component of the input signal passes through the capacitor 2 and is supplied to the tweeter 1 to emit high sound.

As described above, according to the present embodiment, the claws 45 having an inverted L-shaped cross section are arranged facing each other on the upper surface of the holder 44 made of a resin molded product, and the catching surface of the claws 15 is arranged. Since the tweeter 1 is fitted into the claw 45 and is coupled with the holder 44 by providing a convex projection 46 on it, the assembling man-hour can be reduced and the work can be performed easily, and the tweeter 1 and the holder 44 are mechanically coupled with a small number of parts. can do. Moreover, since the protrusion 46 presses the tweeter 1 downward, it is possible to inexpensively obtain a speaker of excellent quality in which the tweeter 1 does not resonate and generate an abnormal sound.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a perspective view of a speaker showing a second embodiment of the present invention. The same parts as those described in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 6, a tweeter 35 has a condenser 36 fixed to the side surface. A bracket 51 made of resin is provided with claws 52 having an inverted L-shaped cross section so as to face each other. A convex projection 53 is provided on a catching surface of the claw 52 and the tweeter 35 is clawed. It is fitted in 52 and is mechanically connected to the bracket 51. This claw 52
The place where the tweeter 35 is fitted is different from that described in the conventional example.

Further, the lead wires 41, 4 are connected to the terminals 39, 40.
One end of 2 is connected and the other end is connected and coupled to the connector 43. The shape of the claw 52 and the projection 53 are the same as those described in the first embodiment of the present invention, the tweeter 35 can be easily fitted into the claw 52, and the projection 53 presses the tweeter 35 downward. The resonance of the tweeter 35 is suppressed.

Further, as described in the first embodiment of the present invention, the protrusion 53 has a function of absorbing variations in the finished dimensions of the tweeter 35 and the bracket 51. Similarly, as the resin material forming the bracket 51, ABS resin containing glass fiber, which is less dimensional change due to temperature, is suitable, and it is better to match it with the material of the housing of the tweeter 35.

The operation of the speaker configured as described above is similar to that described in the conventional example, and the high frequency component of the input signal applied to the connector 43 passes through the capacitor 36 and enters the voice coil, and the diaphragm is opened. It is configured to vibrate and radiate high tones in the air.

As described above, the claws 52 having an inverted L-shaped cross section are formed on the bracket 51 so as to face each other, and the projections 53 having a convex shape are provided on the catching surfaces of the claws 52 so that the tweeter 35 is attached to the claws 52. By fitting and coupling with the bracket 51, the number of assembling steps is small, the self-tapping screw is unnecessary, and the tweeter 35 and the bracket 51 can be inexpensively constructed with excellent quality without resonating.

In the first embodiment, the woofer 5 has been described with reference to the circular shape, but the woofer 5 may have an elliptical shape or a rectangular shape. The tweeter 1 is not limited to the dome shape, and may be a cone shape or an elliptical shape. Further, in the second embodiment, the tweeter 35 has been described with reference to the dome type drawing, but it may be a cone type or an elliptical shape, and is not limited to the tweeter, and is a squawker or a small full-range speaker. It goes without saying that it is okay.

[0040]

As described above, the speaker according to the present invention is
By placing claws having an inverted L-shaped cross section on a holder or a bracket so as to face each other, a convex protrusion is provided on a catching surface of the claws, and the tweeter is fitted into the claws and mechanically coupled, thereby making It is possible to easily realize a speaker of excellent quality, which does not require a tapping screw, has a small number of assembling steps, is inexpensive, and does not generate an abnormal sound due to resonance of the tweeter.

[Brief description of drawings]

FIG. 1 is a perspective view of a speaker according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a tweeter and a holder of the speaker according to the first embodiment.

FIG. 3 is an enlarged perspective view of a claw portion according to the first embodiment.

FIG. 4 is a sectional view of a claw portion according to the first embodiment.

5A is a cross-sectional view of a claw portion showing another example of the shape of protrusions in the first embodiment, and FIG. 5B is a cross-sectional view of a claw portion showing another example of the shape of protrusions in the first example.

FIG. 6 is a perspective view of a speaker according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a conventional speaker.

FIG. 8 is a structural cross-sectional view of a conventional speaker

FIG. 9 is a perspective view of a conventional speaker.

[Explanation of symbols]

1 Tweeter 2 capacitors 5 woofer 6 voice coils 7 Lower plate 8 screws 9 Dustproof cushion 10 diaphragm 11 frames 12, 13 Gold wire 14 terminal board 15,16,17,18 terminals 44 holder 45 claws 46 protrusions

Claims (2)

[Claims] 1. A cross-sectional shape is formed in an inverted L-shape at the end of the upper surface of a holder connected to a magnetic circuit of a woofer so that the upper surface of the tweeter is located on the front surface of the woofer. A speaker in which claws having convex protrusions on the catching surface are provided so as to face each other, and a tweeter is fitted into the claws to be coupled. 2. A speaker in which a speaker is fitted into the claw of a bracket provided with claws having an inverted L-shaped cross section and provided with convex projections on the catching surface so as to face each other, and the speaker is joined to the bracket.