KR200173126Y1 - A thin sheet buzzer - Google Patents

Abstract

The present invention relates to a thin plate buzzer to reduce the thickness of the thin plate buzzer by improving the structure of the housing in which the magnet, the excitation coil, and the metal ring are mounted, that is, the housing and the frame embedded therein.

The thin plate buzzer according to the present invention includes a housing having a predetermined shape integrally formed by an insulating material so that a separate terminal and a frame are embedded, a metal ring fixed on the frame, and the frame to be embedded in the metal ring. A magnet fixedly installed above, a coil wound in a cylindrical shape, mounted on an iron core installed in the center of the frame, and excited with an external power source, and mounted on the metal ring and vibrated by the magnetic force of the magnet and the coil. The buzzer output port is formed on the diaphragm and one side to be generated, and is made up of a cover that is fixed while surrounding the upper portion of the housing.

According to the present invention, there is an effect that can thin the electronic products such as a thin plate buzzer, furthermore, a thin plate buzzer is equipped with a mobile phone or PCS phone.

Description

A thin sheet buzzer

The present invention relates to a thin plate buzzer embedded in various electronic products such as a mobile phone or a personal communication service phone, and more particularly, a housing in which a magnet, a coil, and a metal ring are mounted, that is, a housing. And it relates to a thin plate buzzer to make the thin plate buzzer by improving the structure of the frame (cover) and cover (embedded).

In general, a buzzer for displaying an operation state of an electronic product, such as an incoming state, is essentially required for electronic products such as mobile phones, PCS phones, and pagers. These buzzers are different from the development of design technology of electronic components. In order to meet the miniaturization of electronic products, the trend is miniaturization and thinning.

As is known, the buzzer vibrates by an excitation coil excited by a driving power source provided from the outside, a magnet disposed around the excitation coil to generate magnetic force, and a magnetic force generated by the excitation coil and the magnet. It consists of a diaphragm (diaphragm) and the like to pronounce the buzzer.

In the conventional thin plate buzzer, as shown in FIG. 1, a diaphragm, a metal ring, a magnet, a coupling coil, etc., is mounted on the upper portion and a fixed terminal for fixing the plate buzzer to another portion is connected to the excitation coil. It can be seen that the housing 114 and the cover 101 having the buzzer output port 102 are coupled to surround the housing 114.

That is, the conventional thin plate buzzer has a frame 109 in which the iron core 107 is placed in the center, and the terminal is integrally formed by an insulating material, and the cutting grooves 110a and 110b are formed at both front and rear ends thereof. The upper part is equipped with an excitation coil 106, a magnet 105, a metal ring 104, a diaphragm 103, and the like, and a cover 101 having a buzzer output port 102 at the top of the housing 114. ) Is combined.

In the thin plate buzzer, as shown in FIG. 2, when an external driving power is supplied to the excitation coil 106, an electric current supplied to the excitation coil 106 is excited to generate an electromagnetic force around the iron core 107. Will be generated.

Thus, at the moment when the electromagnetic force is generated from the iron core 107, the magnet piece of the diaphragm 103 seated on the metal ring 104 moves to the upper end of the iron core 107 while descending by the electromagnetic force, and then the excitation coil 106 When the driving power supplied to the electric power is cut off, the magnetic force is lost and the magnetic force of the diaphragm 103 rises higher than the horizontal by elasticity away from the upper end of the iron core 107.

When the driving power supplied to the excitation coil 106 is repeatedly supplied / blocked or the driving power of a waveform such as a square wave or a sine wave is input, the diaphragm 103 oscillates up and down to correspond to the supply / blocking speed of the driving power. While the buzzer sound is generated, the buzzer sound generated in this way is transmitted to the outside through the buzzer output port 102 formed in the cover 101.

Here, referring to FIG. 3, the frame 109, that is, the frame 109 embedded in the housing 114, may be fixed to the frame 109 in the housing 114 made of the insulating material 108. The underside of is wrapped with the insulating material 108 of a predetermined thickness T1.

In other words, in order to fix the frame 109 while maintaining the shape of the housing 114 by the insulating material 108, the insulating material 108 must be maintained at a predetermined thickness T1 or more, so that the housing, that is, the thin plate buzzer has a drawback. have. As a result, the thickness of the electronic product in which the thin plate buzzer is adopted is also thickened.

In addition, the thin plate buzzer is characterized by thinning itself or thinning electronic products in which the thin plate buzzer is embedded. Has the drawback that it grows.

An object of the present invention for solving the drawbacks as described above, the thin plate to make the thin plate buzzer by improving the structure of the housing, that is, the housing and the frame and cover embedded therein, to which the magnet, coil and metal ring, etc. are mounted. It is in providing a buzzer.

In other words, an object of the present invention is to minimize the thickness of the thin plate buzzer mounted on electronic products such as mobile phones, PCS phones, and pagers to make each electronic product thinner.

1 is an exploded perspective view showing a conventional thin plate buzzer.

2 is a cross-sectional view for explaining an operating state of a conventional thin plate buzzer.

3 is a cross-sectional view of the housing of the thin plate buzzer of FIG.

Figure 4 is a perspective view showing a thin plate buzzer according to the present invention.

Figure 5 is an exploded perspective view showing a thin plate buzzer according to the present invention.

6A, 6B and 6C are cross-sectional views taken along line A-A, B-B and C-C of the housing in the thin plate buzzer of FIG.

Figure 7a, 7b is a perspective view showing a frame of a thin plate buzzer according to the present invention.

8 is a perspective view showing a metal ring of a thin plate buzzer according to the present invention.

Figure 9a is a perspective view showing an example of the cover of the thin plate buzzer according to the present invention.

Fig. 9B is a sectional view taken along the line D-D of the cover shown in Fig. 9A.

Figure 10a is a perspective view showing another example of the cover of the thin plate buzzer according to the present invention.

Fig. 10B is a cross sectional view taken along the line E-E of the cover shown in Fig. 10A.

11 is a perspective view showing a plurality of frames embedded in a housing in the present invention.

12 is a perspective view showing a plurality of terminals embedded in a housing in the present invention.

Figure 13 is a cross-sectional view of the thin plate buzzer for explaining the operating state of the thin plate buzzer according to the present invention.

※ Explanation of code about main part of drawing ※

1: cover 2, 2a, 2b: buzzer output port

3: diaphragm 4: metal ring

5: magnet 6: female coil

7: iron core 8: insulation material

9: frame 10a, 10b: incision groove

11: Jaw 12: Connection terminal

13a, 13b: connection terminal 14: housing

15 frame assembly 16 frame connecting member

17: frame support member 18: cutting groove

19: terminal 20: terminal support member

21: terminal connecting member 22a, 22b: fixed terminal

23a, 23b: support plate 24a, 24b: torsion prevention groove

25a, 25b: upper surface 26a, 26b: side wall

Thin plate buzzer according to the present invention for achieving the object as described above, a plurality of terminals bent in a multi-stage is exposed to the bottom and side and the resonant space on one side of the frame is exposed to the top and bottom of the iron core installed in the center A housing molded into a predetermined shape by an insulating material such that the housing is formed; A metal ring fixed on the frame; A magnet fixed to the frame to be inserted into the metal ring; A coil wound in a cylindrical shape and mounted on an iron core placed in the center of the frame and excited by an external power source;

A diaphragm seated on the metal ring and vibrated by magnetic forces of the magnet and the excitation coil to generate a buzzer sound; And a cover having a buzzer sound output port formed at one side thereof, and having a plurality of protrusions and torsion preventing grooves formed on the inner surface thereof and being fixed while being wrapped around the upper portion of the housing.

The outer periphery of the bottom of the frame is formed with a predetermined jaw, only the outer periphery including the jaw of the frame is embedded with a predetermined thickness so that the top and bottom of the frame is exposed to the outside, and is connected to both ends of the excitation coil The terminal is preferably embedded by an insulating material so that the portion and the portion connected to the contact point such as the PCB on which the thin plate buzzer is mounted are exposed to the bottom surface.

In addition, the upper edge of the metal ring is formed with an inclined surface of a predetermined angle inclined outward, the torsion preventing groove is preferably formed radially from the center of the inner surface of the cover.

The above method for manufacturing a thin plate buzzer is a thin plate buzzer manufacturing method for manufacturing a thin plate buzzer in which a diaphragm is vibrated by a magnetic force of an excitation coil and a magnet excited by an external power source to output a buzzer sound. Forming a housing having a predetermined shape such that a terminal bent in two stages so that a part thereof is exposed to the outside and a frame in which an iron core is placed in the center thereof are embedded; Attaching a cylindrical coil wound to the iron core of the frame and connecting both ends of the excited coil to the connection terminals of the terminal, respectively; Attaching a metal ring and a magnet on the frame and then seating a diaphragm on the metal ring; And coupling a cover to the upper portion of the housing to surround the excitation coil, the magnet, the metal ring, and the like.

Here, the housing may be formed by forming a predetermined jaw on the outer periphery of the bottom of the frame, injecting the frame and the terminal into a molding apparatus, and then inserting an insulating material, the frame includes only the outer jaw to the insulating material It is buried to a predetermined thickness so that the upper surface and the bottom surface of the frame can be exposed to the outside, the terminal is exposed to the bottom portion is connected to both ends of the excitation coil and the contact point such as a PCB on which the plate buzzer is mounted It may be buried by an insulating material if possible.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing an embodiment of a thin plate buzzer according to the present invention, the diaphragm, and the connection terminal connected to the excitation coil at the lower end of the housing 14, the metal ring, magnet, excitation coil, etc. are seated Connection / fixing terminals 13b and 22b are formed to be fixed to PCB contacts embedded in a mobile phone or a PCS phone. A cover 1 having a buzzer output port 2 surrounding the housing 14 is formed thereon. It can be seen that it is combined.

FIG. 5 is an exploded perspective view showing a thin plate buzzer according to the present invention, in which a frame 9 and a terminal 19 in which an iron core 7 is placed in the center are formed into an integral housing 14 by an insulating material 8. The cutting grooves 10a and 10b are formed at both front and rear ends of the housing 14, and the excitation coil 6, the magnet 5, the metal ring 4, and the diaphragm are formed on the upper portion of the housing 14. 3) While the back is fixed, a cover 1 having a buzzer output port 2 is finally coupled to the upper portion of the housing 14.

At this time, the upper end of the drawing extends by the length L so that the resonance space for amplifying the buzzer may be formed while reducing the thickness of the thin plate buzzer when the cover 1 is coupled to the housing 7.

The housing 7, which is the base of the thin plate buzzer, is formed of an integrally shaped terminal 19 and a frame 9 which have a predetermined shape by an insulating material 8, and the housing 7 is bent in multiple stages. 6, 6b, and 6c are formed so that the connecting terminal 13b is exposed to the side as shown in FIGS. 6A, 6B and 6C, while the connecting terminal 12 slightly higher than the bottom of the housing 7 is exposed to the bottom. It is molded.

The exposed connection terminal 13b is connected to a contact point of a PCB embedded in an electronic product such as a mobile phone, a PCS phone, a wireless pager, and the like, and the connection terminal 12 is wound on an iron core placed in the center of the frame 8. It is connected to both ends of the female coil 6 which is present. Of course, the connection terminal 12 and the connection terminal 13b electrically connected thereto are formed symmetrically on both sides of the housing 7.

The frame 9 embedded in the upper housing 7 has an iron core 7 having a predetermined height in the center, as shown in FIGS. 7A and 7B, and has a predetermined height at the outer side of the underside having a left-right symmetrical shape. The jaw 11 is formed. In other words, as illustrated in FIG. 7B, a jaw 11 having a predetermined height is formed on the outside of the frame 9 spaced a predetermined distance from the center to reduce the thickness of the frame 9.

When the jaw 11 having a predetermined height is formed on the outer side of the frame 9, the insulator 8 is the outer jaw of the frame 9 to fix the frame 9 when the housing 14 is molded. Since only 11 is formed and the upper end of the housing 14, the thickness of the frame 9 and the insulating material 8, that is, the thickness of the housing 14, is reduced by the height of the jaw 11.

In other words, the housing 14 can not only firmly fix the frame 9 while maintaining a predetermined shape, but also become thinner than the conventional housing.

In addition, the cover 1 is fusion-bonded to the upper end of the housing 14, and various embodiments of the cover 1 are configured as in FIGS. 9A, 9B or 10A, 10B.

9A and 9B are a perspective view and a cross-sectional view showing an example of the cover 1, and a side wall 26a of a predetermined height is formed at the outer side of the bottom of the cover 1 to be fused to the welding jaw when it is coupled to the housing 14. On one side of the side wall 26a, that is, the side wall 26a of the portion where the resonance space is formed, a buzzer output port 2a for outputting the buzzer sound generated inside the thin plate buzzer is formed.

In addition, the inner surface of the cover 1, that is, the upper surface 25a, is spaced apart from the diaphragm 3 by a predetermined distance when coupled to the housing 14, so that a plurality of support plates 23a for limiting vibration of the diaphragm 3 are mutually provided. It is configured to be downward at equal intervals, and a radial torsion preventing groove 24a is formed in the center of the inner surface of the cover 1 to prevent the thinned cover 1 from twisting.

10A and 10B are a perspective view and a cross-sectional view showing another example of the cover 1, and a side wall 26b of a predetermined height is formed at the outer side of the bottom of the cover 1 to be fused to the fusion jaw when it is coupled to the housing 14. On one side of the upper surface 25b of the cover 1, that is, the upper surface 25b of the portion where the resonance space is formed, a buzzer output port 2b for outputting the buzzer sound generated inside the thin plate buzzer is formed. .

In addition, the inner surface of the cover 1, that is, the upper surface 25b, as in the embodiment, is spaced apart from the diaphragm 3 by a predetermined distance when coupled to the housing 14 so as to limit the vibration of the diaphragm 3. The support 23b is configured to face downward at equal intervals, and a radial torsion preventing groove 24b is formed in the center of the inner surface of the cover 1 to prevent the thinned cover 1 from twisting.

Preferably, a reinforcing jaw is formed on the outer side of the buzzer sound outlet 2b of the inner surface of the cover 1 to prevent the cover 1 of the portion where the buzzer sound outlet 2b is formed from being easily damaged.

Before describing the operation of the present invention looks at the process of forming the housing 14 integrally.

First, as shown in FIGS. 11A and 7B, a plurality of frames 9 having an iron core 7 placed in the center and a jaw 11 formed at the bottom thereof are made of one metal as shown in FIG. 11. It is molded into. That is, a plurality of frames 9 are connected to the frame supporting member 17 by the frame connecting member 16 to form one frame assembly 15.

Here, the frame connecting member 16 connecting the plurality of frames 9 and the frame supporting member 17 has a frame connecting member 16 exposed to the outside of the housing 14 after the housing 14 is formed. Cutting grooves 18 are formed to smoothly cut the frame 9.

In addition, as shown in FIG. 12, the connection terminal 12 connected to the excitation coil 6 and the connection terminals 13a and 13b fixed to the contacts of the PCB embedded in electronic products such as mobile phones or PCS phones, and fixed. The terminal 19 including the terminals 22a and 22b is connected to the terminal support member 20 by the terminal connecting member 21. That is, the plurality of connection terminals 13a and 13b, the excitation coil 6, the connection terminal 12, and the fixed terminals 22a and 22b are integrally connected to the terminal support member 20 by the terminal connection member 21. In order to facilitate the operation during the molding of the housing (14).

Here, among the excitation coil 6 connection terminal 12 and the fixed terminals 22a and 22b of the terminal 19 embedded in the housing 14, the excitation coil 6 connection terminal 12 is as shown in Fig. 6B. It is exposed to the outside (bottom) so that it can be connected to both ends of the female coil 6 without occupying a separate space, and the connection terminals 13a, 13b and the fixed terminals 22a, 22b are also mobile phones or PCS phones. It is exposed to the outside (bottom) so that it can be connected to the contacts of PCB embedded in electronics.

In particular, by forming the height of the excitation coil 6 connection terminal 12 higher than the bottom height of the housing 14, the connecting portion due to the connection such as soldering when connecting both ends of the excitation coil 6 to the connection terminal 12 It is possible to prevent protruding lower than the bottom of the housing 14.

In order to mold the housing 14 using the frame assembly 15 and the terminal 19 configured as described above, a frame as shown in FIGS. 11 and 12 is placed in a mold not shown for forming the housing 14. After mounting the assembly (15) and the terminal (19), close the mold. Subsequently, the insulating member 8 is sprayed into the mold to form the housing 14, and then the frame connecting member 16 and the terminal connecting member 21 exposed to the outside are bent and cut to complete the housing 14.

Here, the excitation coil 6 connecting terminals 12, 13a, 13b and the fixed terminals 22a, 22b are respectively separated and exposed to the outside of the housing 14 so that both ends of the excitation coil 6 can be connected. In addition, it can be fixed to the contacts of PCBs embedded in electronic products such as mobile phones or PCS phones. In addition, the front and rear ends of the housing 14 allow both ends of the excitation coil 6 to be drawn out to connect to the connection terminal 12, while the air flow between the inside and the outside of the thin plate buzzer, that is, transfer of the buzzer sound. Incision grooves 10a and 10b are formed to be guided smoothly.

After molding the housing 14 through the above process, the operator inserts the excitation coil 6 wound to fit the iron core 7 into the iron core 7 and cuts both ends of the excitation coil 6 in the indentation groove 10a. ) To be connected to the excitation coil (6) connection terminal 12. Then, the metal ring 4 is attached to the upper end of the frame 9 using an adhesive, and then the magnet 5 is fixedly installed at the upper end of the frame 9, that is, inside the metal ring 4 by using an adhesive. do.

At this time, as the metal ring 4, a metal ring machined to be used to form an inclination angle θ1 of 42 ° to 48 ° is formed in the upper outer portion. That is, an inclination angle θ1 of 42 ° to 48 ° is formed on the upper edge of the metal ring 4 to prevent friction between the outer end of the diaphragm 3 and the upper outer edge of the metal ring 4 when the diaphragm 3 vibrates. By reducing the diaphragm (3) to maintain the maximum amplitude of the buzzer sound generation efficiency can be increased.

After attaching the magnet 5 and the metal ring 4, the cover 1 having the diaphragm 3 seated on the metal ring 4 as in the related art and having a buzzer outlet 2 on the housing 14. ) To complete the assembly of the thin plate buzzer.

Here, the support plate 23a, 23b is formed in the center and the outer surface of the bottom of the cover 1, respectively, to prevent the diaphragm 3 from being separated from the metal ring 4, or to prevent the diaphragm 3 from vibrating excessively. have.

This thin plate buzzer is supplied with driving power from the outside through the excitation coil 6 connection terminals 12 (13a) and 13b as shown in FIG. 13, and current flows through the excitation coil 6 to the iron core 7. The wound female coil 6 is excited to generate an electromagnetic force from the iron core 7.

In this way, the moment the electromagnetic force is generated from the iron core (7), the magnet piece of the diaphragm (3) seated on the metal ring (4) moves to the upper end of the iron core (7) while descending by the electromagnetic force, and then to the excitation coil (6) When the driving power supplied is cut off, the iron core 7 loses the electromagnetic force and is separated from the upper end of the iron core 7 by the self-elasticity of the diaphragm 3 to rise higher than horizontal.

At this time, the outer periphery of the diaphragm 3 which rises by its elasticity is lowered along the inclined surface without hitting the outer periphery of the metal ring 4 as shown in FIG. 8 to have a position lower than the maximum height of the metal ring 4. In other words, as the friction between the outer portion of the metal ring 4 and the diaphragm 3 decreases when the diaphragm 3 vibrates, the width of the magnet piece of the diaphragm 3 vibrating up and down increases, and the buzzer sound generated from the thin plate buzzer increases.

Of course, by forming the inclined surface on the upper end of the metal ring 4, the noise generated when the upper end of the metal ring 4 and the diaphragm (3), that is, it is possible to reduce the generation of noise other than the audible frequency band.

As described above, when the driving power supplied to the excitation coil 6 is repeatedly supplied / blocked, the diaphragm 3 vibrates up and down corresponding to the speed at which the driving power is supplied / blocked to generate a buzzer sound. Is transmitted to the outside through the buzzer output port (2) formed in the cover (1).

In this case, since the cutting grooves 10a and 10b are formed at the bottom of the thin plate buzzer, that is, at the front and rear ends of the housing 14, the air flows smoothly between the inside and the outside of the thin plate buzzer, so that the diaphragm 3 vibrates. The transmission efficiency of the generated buzzer sound is increased.

Therefore, according to the present invention, the thin plate buzzer can be thinned by improving the structure of the housing, that is, the housing and the frame and the cover which are mounted with the magnet, the excitation coil, and the metal ring.

Furthermore, there is an effect that can reduce the thickness of electronic products, such as a mobile phone or PCS phone is equipped with a thin plate buzzer.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical idea of the present invention, and such modifications and modifications belong to the appended utility model registration claims. will be.

Claims (6)

A housing formed in a predetermined shape by an insulating material such that a resonant space is formed at one side of the plurality of terminals bent in multiple stages to be exposed to the bottom and side, and the frame in which the core is placed at the center is exposed to the top and bottom; A metal ring fixed on the frame; A magnet fixed to the frame to be inserted into the metal ring; A coil wound in a cylindrical shape and mounted on an iron core placed in the center of the frame and excited by an external power source; A diaphragm seated on the metal ring and vibrated by magnetic forces of the magnet and the excitation coil to generate a buzzer sound; And A buzzer sound output port is formed on one side, and a plurality of protrusions and torsion preventing grooves are formed on an inner surface thereof and the cover is fixedly installed while surrounding the upper portion of the housing; Thin plate buzzer characterized in that it comprises a. The method of claim 1, The frame, the thin plate buzzer, characterized in that the iron core is integrally formed in the center and the jaw of a predetermined height is formed on the outside of the bottom surface. The method of claim 1, The frame, the thin plate buzzer, characterized in that only the outer periphery including the jaw of the frame is embedded with a predetermined thickness so that the top and bottom of the frame is exposed to the outside. The method of claim 1, The terminal is buried by the insulating material so that the portion connected to the both ends of the excitation coil and the portion connected to the contact point, such as a PCB on which the thin plate buzzer is mounted is exposed to the bottom. The method of claim 1, The thin plate buzzer, characterized in that the inclined surface of the predetermined angle inclined outward is formed on the upper edge of the metal ring. The method of claim 1, The torsion preventing groove formed on the inner surface of the cover, the thin plate buzzer, characterized in that formed radially.