KR20020051817A - Multi functional sound generating device and portable terminal - Google Patents

Abstract

PURPOSE: A multifunctional sounding body for generating sound and vibration is provided to prevent a mechanical vibration system from largely displacing in a radial direction by receiving a shock when fallen and to prevent a suspension and a coil from being deformed and damaged. CONSTITUTION: The multifunctional sounding body(3) comprises a magnetic circuit(2) having a voice coil(8) and a spacer. A brim part(6) is arranged on the outer side of the magnetic circuit(2) which is elastically supported by a suspension(9). A plurality of projecting parts(5) are disposed on the inner peripheral face of the spacer arranged in the inner peripheral face of a casing and the brim part(6) is positioned in the projecting part(5) so as to be stored. Thus, the displacement of the mechanical vibration system is prevented by making the brim part(6) on the projecting part(5) at the time of displacement in the radial direction. Then, the suspension(9) and the coil(8) are prevented from being deformed and damaged.

Description

Multi functional sound generating device and portable terminal

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multifunctional speaker device mounted on a portable terminal (hereinafter referred to as a device) such as a mobile telephone or a small information communication terminal, which notifies an incoming call to a user by sound or vibration.

The device is generally configured to be used to switch buzzer or melody sound to notify the user, or to generate a vibration in the silent mode without sound, for this purpose, generating sound equivalent to a small speaker. Both the sounding body and the vibration generating vibrating body for rotating the eccentric weight with a small motor were mounted. As described above, mounting both the sounding body and the vibrating body is disadvantageous in the cumbersome work in the attaching process and miniaturization and light weight of the device, but recently, a multifunctional sounding body which generates both sound and vibration in one sounding device (device) has been proposed. It is becoming.

8 is an exploded perspective view showing the conventional multifunctional sounding body, FIG. 9 is a plan view of the multifunctional vibrating body of FIG. 8 seen from the diaphragm 7 side, and FIG. 10 is a view of the cover 15 of the multifunctional sounding body of FIG. 9. The bottom sectional view which shows the removal state, and FIG. 11 show the side sectional view, respectively, when FIG. 9 is cut | disconnected to the cross section along the BB line.

As shown in Fig. 8, the conventional multifunctional speaker has a ring-shaped voice coil 8, a diaphragm 7 for jointly supporting the voice coil 8 from one side, and a magnetic circuit 2. A disk-shaped magnet 14 and a supporting plate-shaped magnetic yoke 11 'holding the magnet 14 and a disk-shaped pole piece 12 superimposed on the upper side of the magnetic yoke 11'; Suspensions 9 and 9 'of the ring-shaped leaf springs which elastically support the magnetic yoke 11' at both upper and lower ends, the bottom cover 15 made of metal, and a circular-shaped body for assembling these parts ( 4 ').

The diaphragm 7 and the cover 15 are each fixedly fixed to the body 4 'at its outer peripheral edge as shown in FIG. 11, while the suspensions 9 and 9' are shown in FIG. The two types of cutouts having elevations in which the projecting pieces 9a, 9b, 9c, 9'a, 9'b, and 9'c are respectively installed at equal intervals of about 120 degrees are installed in the frame of the body 4 '. (4'a or 4'b) is inserted and bonded to be elastically supported. In addition, the voice coil 8 is inserted into the magnetic gap of the magnetic circuit 2, and as a result, the diaphragm 7 and the magnetic circuit 2 are assembled in the body 4 'with each other face to face.

By this structure, when a current having a predetermined frequency is applied to the voice coil 8 from the power supply terminal 16, the coil 8, the magnet 14, the magnetic yoke 11 'and the pole piece 12 Electromagnetic force acts between the magnetic circuits constituting the two, and magnetic vibration and repulsion are repeated to start vibration. At this time, if the frequency of the current is somewhat high and the audible frequency range, the vibration of the diaphragm 7 joining the coils 8 becomes large, and the vibration generates audible sounds such as buzzer, melody, and voice.

On the other hand, since the natural frequencies are low, the suspensions 9 and 9 'rarely vibrate. If the frequency of the current is relatively low that is below the audible frequency range, the diaphragm 7 does not vibrate so that no sound comes out. Instead, the vibration of the suspensions 9 and 9 'holding the magnetic circuit 2 is large. You lose. Then, the mechanical vibration system 10 composed of the magnetic circuit 2 and the suspensions 9 and 9 'vibrates, and the vibration energy is increased by the total mass of the vibration system 10, so that the generated vibrations are body Through 4 ', it is transmitted to the apparatus which is not shown in which the multifunctional speaker 3' was mounted, and an incoming call is informed to a user. In this way, one sounding body performs two operations of pronunciation and vibration.

On the outer circumferential wall of the magnetic yoke 11 'of the mechanical vibration system 10, which is the source of vibration, the blade 6 is provided so as to project toward the inner circumferential surface of the body 4' at about equal intervals. The blade portion 6 is a stopper for preventing the impact caused by the contact between the magnetic yoke 11 'and the body 4', and the magnetic yoke 11 'while keeping the mass of the magnetic yoke 11' constant. It is also installed to form a thin overall thickness.

As shown in FIG. 10, this blade part 6 is accommodated in the recessed part 17 provided in the inner peripheral surface of the body 4 '. This recessed part 17 is not only a groove part which suppresses the diameter width of the body 4 'but also a stopper which controls the displacement of the blade part 6 of a radial direction with respect to the centerline direction of the body 4'. . By preventing the displacement, deformation of the suspensions 9 and 9 'and the coil 8 can be prevented in advance. In order to install this recess 17, the notched ends 4'a, 4'b are set to the minimum size necessary to fit the projection pieces, and at the same time, the two suspensions 9, Since 9 ') is provided, it is formed with high order.

In recent years, as the demand for improving the sensitivity of the incoming notification of the device increases, an increase in the amount of vibration upon incoming notification in vibration has been desired. Therefore, in the multifunctional vibrating body 3 'having the above configuration, as shown in FIG. 8 or 10, two suspensions 9 and 9' overlap with the blade portion 6, so that the blade portion Since 6 is a form sandwiched between them, it becomes impossible for the blade part 6 to be displaced up and down below the allowable elastic displacement amount of the suspension 9 and 9 'at the time of the up-and-down vibration of the mechanical vibration system 10. FIG. . That is, since the up-and-down vibration of the magnetic circuit 2 becomes the form which is suppressed by the suspensions 9 and 9 ', it was difficult to take out a large amount of vibration.

Moreover, since the blade part 6 also has the function of the impact-resistant stopper as mentioned above, it is necessary to obtain some strength. Therefore, it is difficult to make thickness thin more than fixed, and also in this case, it became one of the causes which restrict | limits the vertical vibration amount of the magnetic circuit 2. As shown in FIG.

Therefore, in order to increase the amount of vibration, the multifunctional speaker 3 as shown in Figs. 12, 13 and 14 has been devised. FIG. 12 is a plan view of the multifunctional sounding body 3, and FIG. 13 is a side cross-sectional view when the multifunctional sounding body 3 of FIG. 12 is cut into the cross section along the C-C line. The main feature of the multifunctional speaker 3 of FIG. 12 is mainly different from that of the multifunctional speaker 3 'of FIGS. 8 to 11 with the blade portion 6 provided on the outside of the magnetic circuit 2 at equal intervals of about 120 degrees. The two suspensions 9 and 9 'are arranged so that they do not overlap each other. In order to achieve such an arrangement, the protruding pieces of two suspensions 9 and 9 '(not shown) are arranged at the same position, and the two suspensions 9 and 9' are arranged so as to overlap each other in plan view. By arranging the suspensions 9 and 9 'up and down in this manner, since the space 18 into which the blade portion 6 is to be dug is provided, even if the magnetic yoke 11 is elastically supported in the suspensions 9 and 9', the blades The part 6 and the suspensions 9 and 9 'can be arranged without overlapping each other.

On the other hand, since the protruding pieces of the two suspensions 9 and 9 'are at the same position, in order to elastically support the two suspensions 9 and 9' up and down on the inner circumferential surface of the annular body 4, it is shown in FIG. As shown, the spacer 1 must be provided between the protrusion pieces. Since there are three protrusions in one suspension, three spacers are also required. However, the provision of three separate spacers not only results in manufacturing cost, but also lowers the assembly efficiency. Therefore, a ring-shaped spacer in which three spacers are connected to each other is used. FIG. 14 is a plan view showing the configuration of the ring-shaped spacer 1 and the magnetic circuit 2, and FIG. 15 is an enlarged view of main portions of the blade portion 6 and the spacer 1.

1 is a plan view showing the configuration of a spacer as a main part of Embodiment 1 and a magnetic circuit;

FIG. 2 is a plan view of the multifunctional speaker having the spacer and the magnetic circuit of FIG.

3 is a side cross-sectional view when the multifunctional speaker of FIG. 2 is cut in a cross section along line A-A,

4 is a plan view showing a state when the multifunctional speaker of FIG. 2 is subjected to an impact force and the magnetic circuit 2 is to be largely displaced in the radial direction;

Fig. 5 is a plan view showing the structure of a spacer as a main part of Embodiment 2 and a magnetic circuit;

6 is a side cross-sectional view of the multifunctional sounding body equipped with the spacer and magnetic circuit of FIG. 5;

FIG. 7 is a plan view showing a state when the multifunctional speaker of FIG. 6 is subjected to an impact force and the magnetic circuit 2 is to be largely displaced in the radial direction, FIG.

8 is an exploded perspective view showing a multifunctional sounding body of the conventional example;

9 is a plan view of the multifunctional vibrating body of FIG. 8 seen from the diaphragm side;

FIG. 10 is a bottom view illustrating a cover removal state of the multifunctional speaker of FIG. 9; FIG.

FIG. 11 is a side cross-sectional view when FIG. 9 is cut along a line B-B in cross section;

12 is a plan view of a multifunctional sounding body of another conventional example;

FIG. 13 is a side cross-sectional view when the multifunctional speaker of FIG. 12 is cut in a cross section along line C-C; FIG.

14 is a plan view showing the structure of a spacer and a magnetic circuit of the prior art;

FIG. 15 is an enlarged view of main parts of the blade part and the spacer of FIG. 14; FIG.

<Description of the symbols for the main parts of the drawings>

1, 1a, 1b: spacer 2: magnetic circuit

3, 3 ': multi-functional pronunciation 4, 4': body

4'a, 4'b: notch end 5: protrusion

6: blade portion 7: diaphragm

8: voice coil 9, 9 ': suspension

9a, 9b, 9c, 9a ', 9'b, 9'c: protrusion

10: mechanical vibration system 11, 11 ': magnetic yoke

12: pole piece 13: recess

14: magnet 15: cover

16 feeding terminal 17 recessed portion

18: space

If the user erroneously drops the device that assembles the multifunction speaker 3 of Figs. 12 and 13, the multifunction speaker 3 is impacted by an external force. At this time, when an impact is applied in the protruding direction of the blade portion 6 (in the direction of the arrow Y in FIG. 14, ie, at an interval of 120 degrees, etc.), the tip of the blade portion 6 and the spacer 1 as shown in FIG. Since the gap d1 of) is sufficiently small, the blade portion 6 serves as a stopper to prevent excessive displacement of the mechanical vibration system 10.

However, under actual use, the impact is applied in other radial directions (all directions other than the arrow Y in Fig. 14), and in this case, the gap d2 between the blade portion 6 and the spacer 1 is ( Since it is quite large compared to d1), the amount of excessive displacement of the mechanical vibration system 10 also becomes unexpectedly large. Therefore, the suspensions 9 and 9 'are excessively displaced as a shock due to the displacement amount, causing plastic deformation, and the resonance characteristic of vibration generation is deteriorated, or the parts are in contact with each other inside the body 4, causing abrasion ( Occasionally there was a sound.

Moreover, in the multifunctional sounding body 3 of the said structure, since the separate member called the spacer 1 needs to be newly installed in the inner peripheral surface of the body 4, it is the same as the multifunctional vibrating body 3 'of FIGS. It was impossible to provide the recessed part 17 in the inner peripheral surface of the body 4 '.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the invention of Claim 1 is formed with the voice coil for electric current application, the diaphragm which supports the said voice coil in one side, and at least one magnet and the magnetic yoke holding the magnet. A mechanical vibration system including a magnetic circuit and a suspension for elastically supporting the magnetic yoke, and a ring shape for inserting the voice coil into the magnetic gap of the magnetic circuit to support the diaphragm and the magnetic circuit in a plane facing each other. And a blade portion provided outside the magnetic circuit and protruding from the outside toward the inner circumferential surface of the body, the spacer provided on the inner circumferential surface of the body, and the blade portion contact the centerline direction of the body. The spacer to limit displacement of the mechanical vibration system in a direction radial to To provide a multi-function sound emitting objects having a plurality of projections formed on the inner peripheral surface.

The invention according to claim 2 of the present invention is a magnetic circuit formed of a voice coil for current application, a diaphragm for supporting the voice coil on one side, a magnetic yoke holding at least one magnet and the magnet, and the A mechanical vibration system including a suspension for elastically supporting a magnetic yoke, a ring-shaped body for inserting the voice coil into magnetic pores of the magnetic circuit to support the diaphragm and the magnetic circuit in a face-to-face direction, and A blade portion provided outside the magnetic circuit and protruding from the outside toward the inner circumferential surface of the body, a spacer provided on the inner circumferential surface of the body, and abutting the blade portion, thereby providing the radial direction with respect to the centerline direction of the body. Multiple misalignments formed on the inner circumferential surface of the spacer to limit the displacement of the mechanical vibration system It provides a multi-function comprising a sound emitting objects.

By constructing the multifunctional sounding body as described above, even if the mechanical vibration system is to be greatly displaced during the impact while increasing the amount of vibration, the blade portion abuts against the protrusion or the recess of the spacer so that the displacement is prevented. And damage can be prevented. Accordingly, a high reliability in the multifunctional sounding body having two functions of pronunciation and vibration can be realized at a low cost with a simple structure.

Moreover, invention of Claim 3 of this invention is a portable terminal which mounts the multifunctional speaker of any one of Claims 1 or 2.

(Example 1)

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the structure of the spacer 1a and the magnetic circuit 2 which are the main parts of the present embodiment, and FIG. 2 is a multifunctional speaker 3 mounted with the spacer 1a and the magnetic circuit 2 of FIG. ), FIG. 3 is a side cross-sectional view when the multifunctional speaker 3 of FIG. 2 is cut along the AA line, and FIG. 4 is a magnetic circuit (2) under the impact force of the multifunctional speaker 3 of FIG. ) Is a plan view showing a state when large displacement is to be made in the radial direction.

The structure of the multifunctional sounding body of this embodiment will be described only in terms of differences from the multifunctional sounding body of the conventional example shown in Figs. . In Fig. 1, the multifunctional sounding body 3 of the present embodiment differs from the conventional example by providing a plurality of protrusions 5 on the inner circumferential surface of the spacer 1a provided on the inner circumferential surface of the body 4, so that the blade portion 6 ) Is the point accommodated in the projection 5.

The basic operation of the multifunctional sounding body 3 shown in Figs. 2 and 3 is the same as in the conventional example, and when the signal current of an audible frequency flows through the voice coil 8 bonded to the diaphragm 7, the diaphragm 7 When vibrating to emit audible sounds such as buzzer, melody, and voice, and using a lower frequency signal, the mechanical vibration system 10 including the magnetic circuit 2 and the suspensions 9 and 9 'vibrates, Vibration is transmitted to the device equipped with this multi-functional speaker 3 via the body (4).

By using the spacer 1a as described above, the multifunction speaker 3 receives an impact force in the radial direction (the direction perpendicular to the centerline direction of the body 4 of FIG. 3), and the magnetic circuit 2 is broken by the broken line in FIG. 4. As indicated, if the displacement in the radial direction is large, since the blade portion 6 abuts the protrusion 5 and excessive displacement of the magnetic circuit 2 is prevented, the mechanical vibration system 10 Displacement in the radial direction is prevented. Therefore, the plastic deformation of the suspensions 9 and 9 ', the magnetic yoke 11 and the pole piece 12 collide with the voice coil 8, and the voice coil 8 can be prevented from being deformed or damaged. have.

In addition, by using the spacer 1a as described above, the two suspensions 9 and 9 'and the blade portion 6 can be arranged so as not to overlap each other while preventing displacement of the mechanical vibration system 10. In the vertical vibration of the mechanical vibration system 10, the vertical displacement of the blade portion 6 is not suppressed by the suspensions 9 and 9 ′. Therefore, since the mechanical vibration system 10 vibrates up and down greatly, it is also possible to increase the amount of vibration.

(Example 2)

Next, based on FIG. 5, FIG. 6, and FIG. 7, the second embodiment of the present invention will be described. FIG. 5 is a plan view showing the configuration of the spacer 1b and the magnetic circuit 2, which are main parts of the present embodiment, and FIG. 6 is a multifunctional speaker 3 mounted with the spacer 1b and the magnetic circuit 2 of FIG. Fig. 7 is a plan view showing a state when the multifunctional speaker 3 of Fig. 6 receives an impact force and the magnetic circuit 2 is to be largely displaced in the radial direction.

The structure of the multifunctional sounding body 3 of the present embodiment will only be described with respect to the differences from the multifunctional sounding body 3 of the first embodiment. The same components will be denoted by the same reference numerals, and duplicated descriptions will be omitted. 5, the multifunctional speaker 3 of the present embodiment differs from the first embodiment in that the recess 13 is provided on the inner circumferential surface of the spacer 1b provided on the inner circumferential surface of the body 4, and the blade portion ( 6 is placed in the concave portion 13 and accommodated, the blade portion 6 extends further outward from the inner circumferential surface of the space 1b, and an extension of the blade portion is shown in FIG. As described above, the inner circumferential surface of the body 4 and the outer circumferential edge of the cover 15 do not contact the blade portion 6.

With this configuration, the multifunction sounding body 3 receives an impact force in the radial direction (the direction perpendicular to the centerline direction of the body 4 in FIG. 6), and the magnetic circuit 2 is largely in the radial direction as shown by the broken line in FIG. 7. If the blade 6 is to be displaced, the blade portion 6 abuts the concave portion 13 so that excessive radial displacement of the magnetic circuit 2 is prevented, so that radial displacement of the mechanical vibration system 10 is prevented. Therefore, the blade portion 6 can be installed to extend further outward from the inner circumferential surface of the spacer 1b while increasing the amount of vibration of the mechanical vibration system 10 and preventing radial displacement, and thus the mechanical vibration system ( 10) can increase the total weight. Therefore, the vibration energy can be made larger.

As can be seen from the above description, according to the multifunctional sounding body of the present invention, the blade portion is designed to increase the amount of vibration of the magnetic circuit, even if the mechanical vibration system is largely displaced in the radial direction during the impact caused by the drop. Since the displacement of the spacer is abutted against the protrusion of the spacer, the deformation and the damage of the suspension, the coil, and the like can be prevented. Accordingly, the high reliability of the multifunctional sounding body which acts as both pronunciation and vibration can be realized at low cost with a simple part structure.

Moreover, by providing a recessed portion in the spacer inner peripheral surface and accommodating the blade portion therein, in addition to the above effects, the blade portion can be provided larger, and the vibration energy can be made larger by increasing the total mass of the mechanical vibration system by that amount.

Claims (3)

A mechanical vibration comprising a magnetic coil formed of a current coil for applying the current, a diaphragm for supporting the voice coil on one side, at least one magnet and a magnetic yoke for supporting the magnet, and a suspension for elastically supporting the magnetic yoke A system having a ring-shaped body for inserting the voice coil into the magnetic gap of the magnetic circuit to support the diaphragm and the magnetic circuit in a plane facing each other, and provided outside the magnetic circuit, A blade portion protruding toward the inner circumferential surface of the body, a spacer provided on the inner circumferential surface of the body, and abutting the blade portion so as to limit the displacement of the mechanical vibration system in a direction radial to the centerline direction of the body. It is characterized by having a plurality of protrusions formed on the inner peripheral surface Intelligent sound emitting object. A mechanical vibration comprising a magnetic coil formed of a current coil for applying the current, a diaphragm for supporting the voice coil on one side, at least one magnet and a magnetic yoke for supporting the magnet, and a suspension for elastically supporting the magnetic yoke A system having a ring-shaped body for inserting the voice coil into the magnetic gap of the magnetic circuit to support the diaphragm and the magnetic circuit in a plane facing each other, and provided outside the magnetic circuit, The inner peripheral surface of the spacer to protrude toward the inner peripheral surface of the body, the spacer provided on the inner peripheral surface of the body, the contact with the blade portion to limit the displacement of the mechanical vibration system in a direction radial to the direction of the center line of the body Characterized by having a plurality of recesses formed in the Intelligent sound emitting object. A portable terminal comprising the multifunctional sounding body according to any one of claims 1 to 10.