KR100291503B1 - Integrated speaker/buzzer - Google Patents

Abstract

PURPOSE: An integrated speaker/buzzer is provided to transmit a sound and a vibration sound toward one direction by arranging a vibrating plate of the speaker and buzzer as the same direction. CONSTITUTION: A frame has the first groove(44a), the second groove(44b) and the third groove(44c). The first yoke(46) has the first penetrate(46a) corresponding to the third groove(44c). The first yoke(46) extends from a bottom to a side wall of the second groove(44b). A cylindrical main magnet(49) has the second penetrate(49a) corresponding to the third groove(44c) and the first penetrate(46a). The second yoke(52) includes a magnet gap and a magnet circuit. The magnet gap is formed at an outer periphery of itself and an upper of the first yoke(46). The magnet gap is formed as a cylindrical shape. The first vibration plate for a corn type speaker is supported at an outer periphery of the first yoke(46). The second vibration plate for a disk type buzzer is supported at a boundary surface of the first groove(44a) and the third groove(44c). An upper end of the third yoke is fixed at the center of a lower surface of the second yoke(42). The third yoke extends toward the second vibration plate.

Description

Integrated Speaker / Buzzer

The present invention relates to an integrated speaker / buzzer, in particular, by using a magnet commonly used to form a magnetic circuit, and by placing the diaphragm of the buzzer above or below the through hole of the magnet, the speaker on the outside and the function of the buzzer on the inside The present invention relates to an integrated speaker / buzzer that can reduce the occupied area of a mobile communication terminal such as a mobile phone by consolidating in a single frame so as to reduce the overall cost and to configure a compact single unit.

In general, an audio system or a wired or wireless communication terminal includes an electro-acoustic conversion device, that is, a speaker, for converting an electric voice signal into a voice. Of course, the component type audio system for reproducing an audio signal employs a 2-3 way speaker system separated from the system main body.

On the other hand, in the mobile communication terminal of the wireless communication method such as a wired and wireless communication terminal, in particular, a mobile phone, all the components included in the terminal except the rechargeable battery are within the allowable range in order to minimize the weight and size of the terminal as much as possible and to increase the talk time. Although the functional aspect of each part is somewhat reduced, the company seeks to reduce the weight.

Therefore, the low-power speaker used in the small mobile communication terminal has a magneto-permanent shape in the inner second groove 4b of the frame 4 having cylindrical first and second grooves 4a and 4b as shown in FIG. A magnetic circuit having a magnet is formed. That is, the magnetic circuit includes a magnet 9 arranged in the center of the yoke 6 and the second groove 4b fixed to the inner circumferential surface of the second groove 4b and a speaker top plate fixed to the upper end of the magnet 9. A magnetic gap is formed between the upper end of the yoke 6 and the speaker top plate 11.

In the center of the magnetic gap, the bobbin 16 wound around the voice coil 5 is supported by a diaphragm 2 serving as a diaphragm so as to be movable up and down, and a center cap 17 is located at the center thereof. Attached to the front of the diaphragm 2 is a protector 3 for protecting the inside is coupled.

The conventional small speaker is applied to the voice coil 5 through the speaker lead line 13 when an audio signal is applied to the terminal board 10, in which case the voice coil 5 located in the magnetic gap of the magnetic circuit is bobbin. Together with (16), sound is generated from the diaphragm 2 by vibrating up and down according to Fleming's left hand law.

On the other hand, a buzzer which is built in a mobile communication terminal and generates a vibration sound for informing a user of an incoming call signal is generally cylindrical frame 24 having a vibration sound outlet 35 for discharging the vibration sound in the center of the upper end as shown in FIG. 2. A magnetic circuit composed of an annular magnet 29, a yoke plate 31 and a pole buzzer yoke 32 is formed at an inner circumference of the buzzer, and a buzzer diaphragm 28 made of stainless steel is disposed above the buzzer yoke 32. It is.

In addition, the upper surface of the buzzer diaphragm 28 corresponding to the buzzer yoke 32 has a polarity opposite to that of a magnetic pole (for example, S-pole) magnetically induced to the buzzer yoke 32 by the magnet 29 ( A weight 27 made of an auxiliary magnet having N poles) is mounted. The buzzer driving coil 21 wound around the buzzer yoke 32 is disposed to form an electromagnet together with the buzzer yoke 32.

When the buzzer is applied with an impulse driving signal of 2.5KHz to 3KHz from the electrode terminal 33 to the buzzer driving coil 21 through the terminal board 30, the buzzer yoke 32 periodically generates an electromagnet having an N-type polarity. Achieve. As a result, the upper end of the buzzer yoke 32 forming the S-pole by the magnet 29 is affected by the electromagnet forming the opposite polarity (N-pole), and the strength of the magnetic field is modulated to the strength.

Therefore, when the strength of the magnetic field of the buzzer yoke 32 is strong, the weight 27 positioned at the upper part thereof is sucked, and the buzzer diaphragm 28 comes into contact with the buzzer yoke 32, and the strength of the magnetic field is weakened by the electromagnet. In this case, the buzzer diaphragm 28 and the buzzer yoke 32 are separated by the restoring force of the buzzer diaphragm 28. The vibration sound generated by the periodic vibration of the buzzer diaphragm 28 is emitted to the outside through the vibration sound discharge port 35.

In general, since the speaker is used in the voice frequency band of 200Hz to 2KHz, and the buzzer is used in the range of 2.5KHz to 3KHz, the speaker and the buzzer are used as separate components by each unit as described above. In addition to the different frequency characteristics, the speaker is driven by Fleming's left-hand law, and the buzzer uses vibration of the diaphragm based on the principle of electromagnetism.

Therefore, in the related art, the speaker and the buzzer are manufactured as separate units according to the difference in frequency characteristics and driving principle, and thus are mounted in the terminal, and thus, there is a limitation in reducing the manufacturing cost, and occupies a large area occupied by the terminal set. .

Therefore, the present invention has been made in view of the problems of the prior art, the object of which is to use the magnet required to form a magnetic circuit in common, and by placing the diaphragm of the buzzer in the upper or lower portion of the through hole of the magnet to the speaker outside The present invention provides an integrated speaker / buzzer that can reduce the occupied area of a mobile communication terminal such as a mobile phone by consolidating in a single frame to have a function of a buzzer inside, thereby reducing the overall cost and configuring a compact single unit.

Another object of the present invention is to provide an integrated speaker / buzzer that can emit sound and vibration sound in one direction by placing the diaphragm of the speaker and the buzzer in the same direction.

1 is a cross-sectional view showing a conventional speaker structure,

Figure 2 is a cross-sectional view showing a conventional buzzer structure,

3 is a front view of the integrated speaker / buzzer according to the first preferred embodiment of the present invention;

4 is a cross-sectional view taken along the line X-X of FIG.

5 is a rear view of the integrated speaker / buzzer shown in FIG. 3;

6 is a cross-sectional view of an integrated speaker / buzzer according to a second preferred embodiment of the present invention.

(Code description for main part of drawing)

41,141; Buzzer driving coil 42,142; Diaphragm

43,143; Protectors 44,144; frame

44a, 144a; Second groove 44b, 144b; First groove

44c; Third recess 45,145; Voice coil

46,146; Yoke for speakers 47,147; wait

48,148; Buzzer diaphragm 49,149; Magnet

50,150; Terminal board 51,151; Top plate for the speaker

52,152; Buzzer yoke 53,153; Speaker leader

54,154; Buzzer leader 55; Vibration Sound Outlet

56,156; Bobbin 57,157; Center cap

58; Electrode terminals for speakers 59; Buzzer electrode terminal

144c; Through hole 149a; Through hole

160; Emission sound outlet 161; gasket

441; Frame for speakers 442; Through hole

443; Buzzer Frame

In order to achieve the above object, the present invention has a cylindrical frame having a first step to third groove stepped step by step, and the first through hole corresponding to the third groove located on the innermost side of the frame and the second A first yoke extending from the bottom of the groove to the side wall, a second through hole corresponding to the first through hole of the third yoke and the first yoke, and having a lower end disposed at the bottom of the first yoke; A cylindrical main magnet set to the same height as the groove, and a disc covering the upper end of the main magnet to form a magnetic gap between its outer peripheral portion and the upper end of the first yoke, and the speaker with the main magnet and the first yoke A second yoke for forming a magnetic circuit of the portion, a first vibration plate for a cone-shaped speaker whose outer peripheral portion is supported at an outer peripheral portion of the first yoke, and movable up and down in the center of the magnetic gap; A voice coil wound around the outer periphery of the bobbin fixed to the first vibration plate, a second vibrating plate for disc-shaped buzzer whose outer periphery is supported on the interface between the second and third yoke grooves, and the center of the lower surface of the second yoke. The third yoke is fixed to the upper end portion and the lower end of the third yoke poles extending near the second vibration plate, and disposed on the lower surface of the second vibration plate facing the lower end of the third yoke and self-induced by the main magnet It has a polarity opposite to the lower end of the polarity of the auxiliary magnet for the second vibration plate in close contact with the third yoke when the initial state, and a buzzer drive coil wound around the outer periphery of the third yoke to form an electromagnet Provide an integrated speaker / buzzer.

In this case, when the bobbin vibrates up and down according to an electric sine wave driving signal applied to the voice coil from the outside to generate sound from the first vibration plate, and forms an electromagnet according to the impulse driving signal applied to the buzzer driving coil from the outside. The vibration sound is generated by periodically decreasing the intensity of the magnetic field of the third yoke induced by the main magnet every so as to periodically separate the second vibration plate in close contact with the third yoke.

The frame includes a cylindrical frame having the first and second grooves having a third through hole corresponding to the first through hole of the third groove and the first yoke in the second groove, and sequentially stepped; It is advantageous that the three grooves are formed in the center portion and the lower cover in which the vibration sound discharge holes are formed in the central portion of the third groove is suitable for the assembly of the parts inside the frame and the arrangement of the support lines for the second vibration plate and the buzzer.

In addition, the first recess is coupled to a protective cap for protecting the interior, the upper portion of the bobbin is provided with a center cap for protecting the interior.

In order to initialize the second vibration plate of the buzzer component in close contact with the third yoke, the upper part of the main magnet is S pole when the upper part of the auxiliary magnet is N pole, and the upper part of the main magnet is S pole when the upper part of the auxiliary magnet is S pole. The upper part is set to the north pole.

According to another feature of the invention, the present invention has a cylindrical frame having a first step to third groove stepped in three steps, and the first through hole corresponding to the third groove located on the innermost side of the frame and the second A cylindrical yoke having a speaker yoke extending from the bottom of the groove to the side wall, and having a second through hole corresponding to the first through hole and having a lower end disposed at the bottom of the speaker yoke, and having an upper end at the same height as the second groove. Speaker top plate for forming a magnetic gap between its outer peripheral portion and the upper end of the speaker yoke in the shape of a disc covering the upper end of the permanent magnet and the speaker, the outer peripheral portion of the speaker is supported on the outer peripheral portion of the first groove A vibration coil, a voice coil wound around an outer periphery of a bobbin fixed to the diaphragm so as to be movable up and down in the center of the magnetic gap, and the second groove and A buzzer diaphragm having an outer circumferential portion supported at a boundary surface of the groove, a buzzer yoke having an upper end fixed to a lower portion of the top plate and a lower end extending near the buzzer diaphragm, and disposed on a lower surface of the buzzer diaphragm and being permanent An auxiliary permanent magnet which has a polarity opposite to that of the lower end of the yoke for buzzer induced by a magnet and closes the buzzer diaphragm to the buzzer yoke when in an initial state, and is wound around the outer periphery of the yoke for buzzer to form an electromagnet. It consists of a drive coil for buzzer.

In this case, the magnetic circuit forming the magnetic gap of the speaker is composed of a speaker yoke, a cylindrical permanent magnet, and a top plate, and the magnetic circuit of the buzzer is composed of a cylindrical permanent magnet, a top plate, and a buzzer yoke.

In addition, sound is generated from the diaphragm for the speaker according to the first driving signal applied to the voice coil, and periodically decreases the strength of the magnetic field of the buzzer yoke according to the second driving signal applied to the buzzer driving coil. The vibration sound is generated by periodically separating the buzzer diaphragm in close contact with the buzzer yoke.

In the integrated unit, the vibration sound of the buzzer is emitted to the rear of the unit and the sound of the speaker is emitted to the front.

According to another feature of the invention, the cylindrical frame having the first and second grooves of the second stage, the first yoke extending from the bottom of the second groove of the frame to the side wall, and the first yoke having a through hole therein A cylindrical first magnet installed at a bottom of the first magnet, an annular second yoke provided at an upper end of the first magnet to form a magnetic gap between its outer peripheral portion and an upper end of the first yoke, and its outer peripheral portion at an outer peripheral portion of the first groove A first vibration plate for a cone-shaped speaker, a bobbin built-in voice coil having an upper end fixed to the first vibration plate so as to be able to flow up and down in the center of the magnetic gap, and a disc-shaped nonmagnetic material and having a through hole of the second yoke. A second vibration plate fixed to cover the second vibration plate, a third yoke fixed to a central portion of the frame and having an upper end extending near the second vibration plate, and disposed on an upper surface of the second vibration plate, A second magnet which has a polarity opposite to that of the upper end of the third yoke induced by the magnet and closes the second vibration plate to the third yoke when in an initial state; and an impulse driving signal wound around the outer periphery of the third yoke. It consists of a buzzer drive coil which periodically forms an electromagnet in response.

In this case, the voice coil vibrates up and down according to the electric sine wave driving signal applied to the voice coil, so that sound is generated from the first vibration plate, and the intensity of the magnetic field of the third yoke is reduced whenever the electromagnet is periodically formed. By periodically separating the second vibrating plate in close contact with the third yoke to generate a vibration sound. In this case, both the speaker and the buzzer radiate to the front.

As described above, in the present invention, a magnet required to form a magnetic circuit is used in common, and each diaphragm is disposed above or below the through hole of the magnet, so that a speaker is provided on the outside and a buzzer is provided on the inside.

Accordingly, as parts of the speaker and the buzzer are shared and duplicated parts are removed, components necessary for the function of the speaker and the buzzer are integrated in a single speaker frame, thereby forming a compact single unit with overall cost reduction.

(Example)

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a front view of the integrated speaker / buzzer according to the first preferred embodiment of the present invention, FIG. 4 is a sectional view taken along line X-X of FIG. 3, and FIG. 5 is a rear view of the integrated speaker / buzzer shown in FIG.

Referring first to FIG. 4, the integrated speaker / buzzer according to the first embodiment of the present invention uses a single frame 44 having cylindrical first to third grooves 44a, 44b, and 44c. The frame 44 has a frame 441 for a speaker in which a through hole 442 is formed in the center of the second groove 44b, and a third groove 44c having an inlet corresponding to the through hole 442. The buzzer frame 443 in which the vibration sound outlet 55 is formed at the center of the third recess 44c is coupled.

In this case, the speaker frame 441 and the buzzer frame 443 are preferably manufactured by injection molding using synthetic resin for light weight and low cost, and may be made of a material such as aluminum to prevent resonance of the frame. It can also be produced by the die-cast method used.

In the present invention, the magnetic circuit of the speaker is fixed to the bottom and side of the second groove 44b, the speaker yoke 46 having a through hole 46a corresponding to the through hole 442, and the second groove ( The upper portion of the magnet 49 including the cylindrical magnet 49 having the through hole 49a corresponding to the through hole 442 and the through hole 49a of the magnet 49 is attached to the central portion of 44b. For example, it is composed of a circular speaker top plate 51 manufactured using a rolled steel sheet for SPCC structure, a magnetic gap is formed between the upper end of the speaker yoke 46 and the speaker top plate 51.

In the center of the magnetic gap, the bobbin 56 wound around the voice coil 45 is supported by the diaphragm 42 acting as a diaphragm so as to be movable up and down, and a center cap 57 is attached to the center thereof. The front of the diaphragm 42 protects the inside, and a protector 43 having a plurality of emission sound outlets 60 is coupled.

In addition, the supply of the driving signal to the voice coil 45 is the voice coil 45 from the electrode terminal 58 for the speaker formed on one side of the terminal board 50 mounted on the back of the frame 44 as shown in FIG. By the speaker leader line 53 connected between).

As described above, the speaker component is formed in the center of the frame 44, the speaker yoke 46 and the magnet 49, except that through-holes 442, 46a, 49a for receiving the buzzer components are formed as described below. And the same configuration as in the prior art.

On the other hand, the buzzer component is fixed to the upper end of the pole-shaped buzzer yoke 52 at the center of the bottom of the speaker top plate 51 forming the magnetic circuit together with the magnet 49, and the buzzer yoke 52 The buzzer driving coil 41 is wound around the upper outer circumferential surface of the upper surface of the upper surface.

In the lower portion of the buzzer yoke 52, a buzzer diaphragm 48 having an outer circumferential portion fixed between the bottom of the through hole 442 of the speaker frame 441 and the inlet of the third groove 44c of the buzzer frame 443 is provided. And a magnetic pole (for example, S-pole) which is arranged on the lower surface of the buzzer diaphragm 48 corresponding to the buzzer yoke 52 and is guided to the buzzer yoke 52 through the speaker top plate 51 by the magnet 49. A weight 47 made of an auxiliary magnet having the opposite polarity (N pole) is mounted toward the third groove 44c.

Therefore, the magnetic circuit of the buzzer component is composed of a magnet 49, a speaker top plate 51 and a buzzer yoke 52, so that the lower end of the buzzer yoke 52 has an S polarity, and the buzzer yoke 52 An electromagnet is formed by the buzzer drive coil 41 wound around its outer circumference.

In addition, the supply of the driving signal to the buzzer driving coil 41 is connected to the buzzer lead line between the buzzer driving coil 41 and the buzzer electrode terminal 59 formed on the other side of the terminal board 50 as shown in FIG. 5. A buzzer lead line 54 is arranged between the joining surfaces of the speaker frame 441 and the buzzer frame 443.

The operation of the integrated speaker / buzzer according to the first embodiment of the present invention configured as described above will be described in detail below.

First, as shown in FIG. 5, when a sine wave input signal is applied to the speaker electrode terminal 58 of the terminal board 50, the speaker coil 45 is connected to the voice coil 45 through the speaker lead line 53. In this case, the voice coil 45 located in the magnetic gap of the magnetic circuit vibrates up and down according to Fleming's left hand law together with the bobbin 56 to generate sound from the diaphragm 42. This sound is discharged to the upper side of the unit through the plurality of emission sound outlets 60 formed in the protector 43 on the front side.

On the other hand, the buzzer component is usually provided at the lower end of the buzzer yoke 52 in which the buzzer diaphragm 48 having the N-pole weight 47 attached to the back forms the S-pole by the magnet 49, when an input signal is not applied. The adsorbed state is maintained by the magnetic attraction force.

In this state, when an impulse wave input signal of 2.5 KHz to 3 KHz is supplied to the buzzer electrode terminal 59 of the terminal board 50, a driving current is applied to the buzzer driving coil 41 through the buzzer lead wire 54, and the buzzer is applied. The yoke 52 forms an electromagnet having N-type polarity periodically during the period of the input signal. As a result, the lower end of the buzzer yoke 52 forming the S-pole by the magnet 49 is influenced by the electromagnet forming the opposite polarity (N-pole), and the strength of the magnetic field is modulated to the strength.

Therefore, when the strength of the magnetic field of the buzzer yoke 52 is strong, the weight 47 positioned at the lower part thereof is sucked and the buzzer diaphragm 48 comes into contact with the buzzer yoke 52, and the strength of the magnetic field is weakened by the electromagnet. In this case, the buzzer diaphragm 48 and the buzzer yoke 52 are separated by the restoring force of the buzzer diaphragm 48. The vibration sound generated by the periodic vibration of the buzzer diaphragm 48 in the third recess 44c is emitted downward through the vibration sound outlet 55 of the buzzer frame 443.

In the description of the above embodiment, the S pole is formed on the upper portion of the magnet 49, the N pole is guided to the upper end of the speaker yoke 46, and the weight 47 facing the buzzer yoke 52 is placed on the upper side thereof. For example, the case of having an N pole having the opposite polarity has been described. However, the N pole is positioned on the upper portion of the magnet and the S pole is positioned on the upper portion of the magnet.

In the first embodiment, the sound of the speaker is emitted upward through the emission sound outlet of the protector 43 of the unit, and the vibration sound of the buzzer is emitted downward through the vibration sound outlet 55 of the buzzer frame 443. .

In the above description of the first embodiment, the S pole is formed on the upper portion of the magnet 49, the N pole is guided on the upper end of the speaker yoke 46, and the weight 47 facing the buzzer yoke 52 is on the upper side. For example, the case in which the north pole has the opposite polarity is described. However, the north pole is located on the upper portion of the magnet and the south pole is positioned on the upper portion of the weight, and the same operation is performed as described above.

Hereinafter, an integrated speaker / buzzer according to the second exemplary embodiment of the present invention will be described with reference to FIG. 6.

The second embodiment of the present invention has a frame 144 similar to the prior art. That is, the frame 144 uses a single frame having a cylindrical shape with first and second grooves 144a and 144b. The through hole 144c is formed in the center of the second recess 144b of the frame 144.

Similarly to the first embodiment, the second embodiment may be manufactured by injection molding using synthetic resin or by die casting using a material such as aluminum.

The magnetic circuit of the speaker in the second embodiment is substantially the same as in the first embodiment. That is, a speaker yoke 146 fixed to the bottom and side surfaces of the second groove 144b and having a through hole corresponding to the through hole 144c, the same cylindrical magnet 149 as the first embodiment, and It consists of an annular speaker top plate 151 having a through hole corresponding to the through hole 149a of the magnet 149 and attached to cover the upper end of the magnet 149, and the upper end of the speaker yoke 146. A magnetic gap is formed between the speaker top plates 151.

In the center of the magnetic gap, the bobbin 156 wound around the voice coil 145 is supported by the diaphragm 142, which acts as a diaphragm, so as to be movable up and down, and a center cap having a central portion having a vibrating sound outlet at the center thereof. 157 is attached, the protector 143 for protecting the inside is coupled to the front surface of the diaphragm 142. The protector 143 is penetrated by a plurality of, for example, four emission sound outlets 160.

In addition, the supply of the driving signal to the voice coil 145 is connected between the voice coil 145 from the electrode terminal for the speaker formed on one side of the terminal board 150 mounted on the back of the frame 144 as in the first embodiment. The speaker lead line 153 is provided.

As described above, the speaker component is formed in the center of the frame 144, the speaker yoke 146, and the magnet 149, except that through holes 144c and 149a are formed to receive the buzzer components as described below. Same configuration as

On the other hand, the lower part of the buzzer yoke 152 of the pole shape is fixed to the center of the bottom of the speaker yoke 146 forming the magnetic circuit together with the magnet 149, the buzzer yoke 152 The buzzer driving coil 141 is wound around the lower outer circumferential surface thereof.

In addition, a buzzer diaphragm 148 having an outer circumferential portion fixed to the upper portion of the speaker top plate 151 by a gasket 161 is disposed on the top of the buzzer yoke 152, and a buzzer diaphragm 148 corresponding to the buzzer yoke 152. ), A weight (e.g., an auxiliary magnet having a polarity (S pole) opposite to a magnetic pole (for example, N pole) guided to the buzzer yoke 152 through the speaker yoke 146 by the magnet 149). 147 is mounted.

Therefore, the magnetic circuit of the buzzer component is composed of the magnet 149, the speaker yoke 151 and the buzzer yoke 152, so that the lower end of the buzzer yoke 152 has an N polarity, and the buzzer yoke 152 is An electromagnet is formed by the buzzer driving coil 141 wound around the outer circumference.

In addition, the supply of the driving signal to the buzzer driving coil 141 is made by the buzzer lead line 154 connected between the buzzer driving coil 141 from the buzzer electrode terminal formed on the other side of the terminal board 150 as shown. The buzzer leader line 154 is disposed through a through hole formed in the second recess 144b of the frame 144.

The operation of the integrated speaker / buzzer according to the second embodiment of the present invention configured as described above will be described in detail below.

First, referring to the operation of the speaker component, when a sine wave input signal is applied to the electrode terminal for the speaker of the terminal board 150, the speaker coil 145 is applied to the voice coil 145 through the speaker lead line 153, in this case to the magnetic gap of the magnetic circuit. The voice coil 145 is located together with the bobbin 156 and vibrates up and down according to Fleming's left-hand law to generate sound from the diaphragm 142. The sound is discharged to the upper side of the unit through the plurality of emission sound outlets 160 formed in the protector 143 on the front side.

On the other hand, the buzzer component is formed at the upper end of the buzzer yoke 152 in which the buzzer diaphragm 148 having the S-pole weight 147 attached to the upper side forms the N-pole by the magnet 149. The adsorbed state is maintained by the magnetic attraction force.

In this state, when an impulse wave input signal of 2.5 KHz to 3 KHz is supplied to the buzzer electrode terminal of the terminal board 150, a driving current is applied to the buzzer driving coil 141 through the buzzer lead-in line 154, and the buzzer yoke 152. ) Forms an electromagnet with N-type polarity periodically during the period of the input signal. As a result, the upper end of the buzzer yoke 152 constituting the N pole by the magnet 149 is influenced by an electromagnet constituting the opposite polarity (S pole), and the strength of the magnetic field is modulated to the strength.

Therefore, when the strength of the magnetic field of the buzzer yoke 152 is strong, the weight 147 positioned on the upper part is sucked, so that the buzzer diaphragm 148 is in contact with the buzzer yoke 152, and the strength of the magnetic field is weakened by the electromagnet. In this case, the buzzer diaphragm 148 and the buzzer yoke 152 are separated by the restoring force of the buzzer diaphragm 148. The vibration sound generated by the periodic vibration of the buzzer diaphragm 148 is emitted upward through the vibration sound discharge port and the discharge sound discharge port 160 of the protector 143.

In the above description of the second embodiment, the S pole is formed on the upper portion of the magnet 149, the N pole is guided to the upper end of the speaker yoke 146, and the weight 147 facing the buzzer yoke 152 is lower. For example, the case of having the S pole having the opposite polarity is described. However, the S pole is positioned above the magnet and the N pole is positioned below the weight.

The second embodiment differs from the first embodiment in that both the sound of the speaker and the vibration sound of the buzzer are emitted upward through the emission sound outlet 160 of the protector 143 of the unit.

In addition, the basic principle of the present invention can be applied not only to a small integrated speaker / buzzer, but also to a device in which a single speaker and a buzzer are applied as individual units. In this case, if there is no limitation in size, the frame and the diaphragm of the speaker component may be modified and modified by those skilled in the art while utilizing the spirit of the present invention.

Furthermore, in the above-described first and second embodiments, an impulse-type signal is used when driving the buzzer, but an buzzer for other uses may be configured by using an AC signal whose polarity is periodically changed.

As described above, in the integrated speaker / buzzer of the present invention, when a sine wave input signal is applied, the speaker component operates as a speaker, and when an impulse wave input signal is applied, the buzzer component operates to serve as a buzzer.

In this case, the magnet is commonly used to form the magnetic circuit of the speaker and the buzzer, and furthermore, it is used to magnetically connect the cylindrical frame for the buzzer, the terminal board, and the magnet for the buzzer and the buzzer yoke. Since the plate can be removed, the overall productivity and cost can be greatly reduced.

Furthermore, the integrated speaker / buzzer integrated into a single unit can be manufactured in the same size as a conventional single speaker unit, thereby providing an advantage that the portable mobile communication terminal can be made thin and light.

As described above, in the present invention, the magnet required to form a magnetic circuit is commonly used, and the buzzer diaphragm is disposed above or below the through hole of the magnet to integrate the functions of the speaker and the buzzer in a single speaker frame, thereby reducing the overall cost. In addition, the compact single unit configuration can reduce the occupied area occupied by mobile communication terminals such as mobile phones.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (5)

Cylindrical frame having three steps first to third grooves sequentially A first yoke having a first through hole corresponding to a third groove located at the innermost side of the frame and extending from the bottom of the second groove to the side wall; A cylindrical main magnet having a second through hole corresponding to the third through hole and the first through hole of the first yoke, and having a lower end disposed at the bottom of the first yoke, and having an upper end set at the same height as the second groove; A second yoke having a disc shape covering an upper end of the main magnet and forming a magnetic gap between an outer circumference thereof and an upper end of the first yoke, and forming a magnetic circuit of a speaker component together with the main magnet and the first yoke; , A first vibration plate for the cone-shaped speaker whose outer circumferential portion is supported on the outer circumferential portion of the first groove; A voice coil wound around the outer periphery of the bobbin, the upper end of which is fixed to the first vibration plate so as to be able to flow up and down in the center of the magnetic gap; A second vibrating plate for disc buzzer having an outer circumferential portion supported on a boundary between the second and third grooves; A pole type third yoke having an upper end fixed to a center of a lower end surface of the second yoke, and a lower end extending near a second vibration plate; The second vibrating plate is disposed on the lower surface of the second vibrating plate opposite to the lower end of the third yoke and has a polarity opposite to that of the lower end of the third yoke induced by the main magnet. With auxiliary magnets to adhere, It is composed of a buzzer driving coil wound around the outer peripheral portion of the third yoke to form an electromagnet, Whenever the bobbin vibrates up and down according to the electric sine wave driving signal applied from the outside to the voice coil, the sound is generated from the first vibration plate, and whenever the electromagnet is formed according to the impulse driving signal applied from the outside to the buzzer driving coil. An integrated speaker / buzzer, characterized in that a vibration sound is generated by periodically decreasing the strength of the magnetic field of the third yoke induced by the main magnet and periodically separating the second vibration plate in close contact with the third yoke. According to claim 1, wherein the frame has a third through hole corresponding to the first through hole of the third groove and the first yoke is formed in the second groove and has the first and second grooves stepped sequentially It consists of a cylindrical frame, and the lower cover is formed in the center of the third groove and the vibration sound discharge hole formed in the center of the third groove, Integrated speaker / buzzer characterized in that the sound of the speaker and the vibration sound of the buzzer is emitted in the opposite direction. The integrated speaker / buzzer of claim 1, wherein the upper part of the main magnet is an S pole when the upper part of the auxiliary magnet is N pole, and the upper part of the main magnet is an N pole when the upper part of the auxiliary magnet is S pole. A cylindrical frame having first and second recesses in two stages, A first yoke extending from the bottom of the second groove of the frame to the side wall; A cylindrical first magnet having a through hole inside and installed at the bottom of the first yoke; An annular second yoke provided at an upper end of the first magnet to form a magnetic gap between an outer circumference thereof and an upper end of the first yoke; A first vibration plate for the cone-shaped speaker whose outer circumferential portion is supported on the outer circumferential portion of the first groove; A bobbin built-in voice coil having an upper end fixed to the first vibration plate to be able to flow up and down in the center of the magnetic gap; A second vibration plate made of a disk-shaped nonmagnetic material and fixed to cover the through hole of the second yoke; A third pole yoke fixed to the center of the frame and having an upper end extending near the second vibration plate; A second magnet disposed on an upper surface of the second vibration plate and having a polarity opposite to that of the upper end of the third yoke induced by the first magnet and in close contact with the third vibration plate in an initial state; It is composed of a buzzer drive coil wound around the outer circumference of the third yoke to periodically form an electromagnet in response to an impulse drive signal, The voice coil vibrates up and down according to the electric sine wave driving signal applied to the voice coil to generate sound from the first vibrating plate, and reduces the intensity of the magnetic field of the third yoke every time the electromagnet is periodically formed. An integrated speaker / buzzer, characterized in that a vibration sound is generated by periodically separating the second vibration plate that is in close contact with the yoke. The protective cap of claim 4, further comprising: a protective cap coupled to the first recess to protect the interior and having a plurality of discharge sound outlets; And a center cap which protects the inside of the bobbin and has at least one exhaust sound outlet.