JP2004048223A - Small-sized electric transducer and holder thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized electric transducer that facilitates the assembling by eliminating the need for a packing and a cushion for preventing an enclosure and a printed circuit board from being resonated due to vibration in the case of mounting the small-sized electric transducer to the enclosure and eliminating the need for a terminal fixing board to receive an input signal from the printed circuit board and to provide a holder thereof. <P>SOLUTION: A holder main body 10 integrally formed by a vibration-proof material such as rubber internally contains an entire speaker main body 2 being a small-sized electric transducer main body, sound is emitted from a front face and a rear face of the holder main body 10, terminal boards 6, 7 are led externally from a window 14 formed for a required part of the holder main body and the tips are extended on the rear face of the holder main body 10 to form a speaker 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a small-sized electric converter such as a speaker or a receiver used for a mobile phone, a portable information terminal (PDA), and the like, and a holder thereof.
[0002]
[Prior art]
For example, as shown in FIG. 9, the speaker of the mobile phone has a front portion of the speaker 22, that is, a front end portion of a frame portion, interposed between a packing cushion 23 and a housing 21 having a sound emission hole 20 formed on the front surface. By preventing the resonance of the housing due to the vibration of the speaker, the rear portion of the housing is brought into contact with the printed circuit board 25 via the braking cushion 24 to prevent the resonance of the printed circuit board 25. 22 is provided with a spring terminal fixing base 26 for fixing the terminal plate, and a terminal plate 27 made of a spring coil is interposed between the spring terminal fixing base 26 and the power supply portion of the printed board 25 so that the terminal A system for supplying input power to the voice coil of the speaker 22 through the plate 27 is employed.
[0003]
However, in this system, it is necessary to interpose cushions between the front part of the speaker and the housing and between the rear part of the speaker and the printed circuit board, respectively. However, there are problems to be solved, such as that the assembling work of the speaker is complicated and it is necessary to store cushions having different shapes as separate parts.
[0004]
Therefore, Japanese Patent Application Laid-Open No. 2000-332876 discloses a fixed holding structure for a receiving speaker in which a holder accommodating a receiving speaker is attached to a chassis with a cushion member interposed therebetween and fixed at a predetermined position in a panel. There has been proposed a fixed holding structure of a receiving speaker integrally formed with a receiving speaker.
[0005]
[Problems to be solved by the invention]
The fixed holding structure of the receiving speaker has an elasticity in which the holder and the cushion are integrally formed, that is, one end is connected to an arbitrary portion of the holder, and the other end is extended toward the center of the holder. A bridge portion is provided, and a cushion is coupled to the other end of the bridge portion so as to be positioned at the center of the holder. However, the holder itself requires a mounting portion for fixing to a chassis, and a cylindrical holder is provided. There is a problem to be improved from the manufacturing point of view, for example, in that it is necessary to integrally form a bridge portion and to provide a cushion at the center portion of the holder at the bridge portion.
[0006]
In view of this situation, the present invention eliminates the need for packing or cushioning to prevent the housing or the printed circuit board from resonating due to vibration when mounting the small electric converter on the housing, and furthermore, the input from the printed circuit board. An object of the present invention is to provide an electric converter which does not require a terminal fixing base for receiving a signal and which facilitates an assembling operation, and a holder therefor.
[0007]
In order to achieve the above object, the invention according to claim 1 of the present invention
The entirety of the main body of the small electric converter is held inside the holder integrally molded with the vibration damping material, and sound is emitted from the front and rear surfaces of the holder,
A small electric converter characterized in that a terminal board is drawn out from a window formed at a required portion of the holder, and a tip end of the terminal board is extended on a rear surface of the holder.
[0008]
The invention according to claim 2 is
The small electric converter according to claim 1,
The small electric converter main body,
It is a speaker.
[0009]
The invention described in claim 3 is:
The small electric converter according to claim 1,
The small electric converter main body,
It is a receiver.
[0010]
Further, the invention described in claim 4 is:
The small electric converter according to claim 1,
The terminal plate,
It is characterized by comprising a leaf spring or a coil spring.
[0011]
The invention described in claim 5 is
The small electric converter according to claim 1,
The holder is
It is made of vibration-absorbing material such as rubber, silicone resin, and vinyl chloride resin that absorbs vibration, and has a locking edge that extends in the axial direction integrally inside the front opening. Things.
[0012]
Further, the invention described in claim 6 of the present invention is:
It is for holding the whole of a small electric converter as a whole,
It has an inner shape that is almost the same as the outer shape of the main part of the electric converter, and has an opening at the front and a locking edge that extends in the axial direction along the edge. A holder for a small electric converter, wherein a main body of a holder having a sound hole and a window for extending a terminal plate to the outside is formed integrally with a vibration-proof material.
[0013]
The invention according to claim 7 is
A locking edge extending in the axial direction inside the opening on the front side of the cylindrical body holding the frame portion mainly composed of a small electric converter, and a magnetic circuit portion on the rear side through a horizontal step portion. The holder main body with the bulging part to hold is integrally molded with the vibration isolating material,
A small electric converter holder, wherein a window for extending a terminal plate to the outside is formed in a part of the step.
[0014]
The invention described in claim 8 is
The holder for a small electric converter according to claim 6,
The vibration-proof material is
It is characterized by being a soft substance such as rubber, silicone resin, and vinyl chloride resin that can absorb vibration.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a small acoustic transducer according to the present invention and a holder thereof will be specifically described with reference to the accompanying drawings. FIG. 1 shows an example of a small electric transducer used in a mobile phone. FIG. 2 is an exploded perspective view showing a speaker main body and a holder, FIG. 2 is a plan view showing a state where the speaker main body is incorporated in the holder shown in FIG. 1, FIG. 3 is a cross-sectional view of FIG. 2, and FIG. 5, FIG. 5 is a sectional view of FIG. 4, FIG. 6 is a plan view showing still another example of the speaker, FIG. 7 is a sectional view of FIG. 6, and FIG. 8 shows a use state of the speaker shown in FIG. FIG. 9 is a sectional view showing an example of a conventional speaker.
[0016]
A speaker 1, which is an example of a small electric converter according to the present invention, includes a speaker main body 2 and a holder 10. The speaker main body 2 includes a frame section 3 holding a vibration system, and a magnetic circuit section 4. A terminal plate 5 formed on a back surface of the speaker body 2 is provided with terminal plates 6 and 7 each composed of a pair of leaf springs projecting obliquely upward.
[0017]
As shown in FIG. 3, the holder 10 has a cylindrical portion 11 having an open front surface for holding the frame portion 3 of the speaker main body 2, and a horizontal step portion 12 provided on the rear opening portion of the cylindrical body 11. The holder main body 10 (substantially the same as the holder and having the same reference number) composed of the cylindrical bulging portion 13 holding the magnetic circuit portion 4 formed through the , Which are integrally formed of a vibration damping material such as a vinyl chloride resin capable of absorbing vibration, and a plurality of sound emitting holes 15, 15. At the same time, a window 14 is formed at a required portion to draw out the terminal plates 6 and 7 protruding from the speaker main body 2 to the outside of the holder main body 10.
[0018]
Therefore, in order to assemble the speaker 1, as shown in FIG. 1, the speaker main body 2 is moved from the opening on the front surface of the holder main body 10 with the terminal plates 6 and 7 projecting from the rear surface facing the window portion 14. It is inserted from the magnetic circuit section 4 side, and after being mounted in the holder main body 10, the locking edge 11a is integrally formed in the opening on the front surface thereof in the axial direction. The speaker body 2 does not have to be detached from the holder main body 10.
[0019]
Due to the internal holding of the speaker main body 2 in the holder main body 10, the pair of terminal plates 6, 7 protruding from the terminal section 5 of the speaker main body 2 are pulled out to the outside from the window 14 formed in the holder main body 10, When the printed circuit board 16 is pressed from above the terminal plates 6, 7, that is, behind the holder main body 10, by extending the front end portion on the back surface of the bulging portion 13 of the holder main body 10, the terminal plates 6, 7 are pressed. Are made of leaf springs, and their distal ends abut against the bulging portion 13 of the holder main body 10 and are fixed, so that there is no need for a terminal fixing base unlike the related art.
[0020]
Since the speaker 30 shown in FIGS. 4 and 5 has the same basic configuration as the speaker 1 shown in FIGS. 1 to 3, the same parts are denoted by the same reference numerals. , Both of which are located on a diameter passing through the central axis, and are different in that the planar shape is I-shaped while the other is L-shaped.
[0021]
Since the speaker 40 shown in FIGS. 6 and 7 has the same basic configuration as the speaker 1 shown in FIGS. 1 to 3, the same parts are denoted by the same reference numerals. A circular concave portion 13a is formed in the center of the speaker body 2 and grooves 13b, 13b are provided at intervals in a part of the peripheral wall, and one end portions of terminal plates 41, 42 made of coil springs are respectively connected to the terminal portions 5 of the speaker body 2. , And the coil portions are arranged so as to be positioned on a diameter passing through the central axis of the concave portion 13a.
[0022]
At this time, a cylindrical guide 13c may be provided as shown in FIG. 7 so that when the coil portion is pressed by the printed board 16, the coil portions of the terminal plates 41 and 42 do not shift.
[0023]
In order to mount the speaker 40 in a housing 20 such as a mobile phone, the locking edges 11 a of the opening of the holder main body 10 are abutted and fixed on the inner peripheral edge of the sound emission hole 20 of the housing 21. When the front surface of the speaker main body 2 is positioned in the sound emission hole 20 and the printed circuit board 16 is pressed against the rear surface of the bulging portion 13 of the holder main body 10 while being pressed against the printed circuit board 16, the power supply section (not shown) of the printed circuit board 16 Thus, an input current flows through the voice coil of the speaker body 2 through the terminal plates 41 and 42.
[0024]
In the above embodiment, the speaker is described as the small electric converter, but the same applies to the receiver.
[0025]
【The invention's effect】
In the small-sized electric converter of the present invention, since the entirety of the main body of the converter composed of a small speaker or a receiver is internally held in a holder integrally formed of a vibration-proof material, when the main body of the converter is attached to the housing, Resonance due to vibration of the converter can be reliably prevented without using a packing material or a cushion material, and the assembling work can be easily performed.
[0026]
In particular, in the present invention, the entirety of the converter is covered with a holder made of a vibration isolating material, and the end of the terminal plate is exposed from a part of the holder and pulled out to the back surface of the holder. Can be stably held between the printed circuit board and the holder by the repulsive force of the vibration-proof material when it is brought into contact with the tip of the terminal plate in a pressed state, and at the same time, resonance can be prevented. Things.
[0027]
Further, the holder for a small electric converter of the present invention is integrally molded with a vibration isolating material, and can entirely hold a converter main body composed of a small speaker or a receiver. When attaching to the housing, there is no need to perform an operation of bonding and fixing a cushion material to the front and rear surfaces of the main body of the converter, so that the number of assembly steps can be greatly reduced, and the number of components can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a speaker main body as an example of a small electric converter used in a mobile phone and a holder.
FIG. 2 is a plan view showing a state where a speaker main body is incorporated in the holder shown in FIG.
FIG. 3 is a sectional view of FIG. 2;
FIG. 4 is a plan view showing another example of a speaker.
FIG. 5 is a sectional view of FIG. 4;
FIG. 6 is a plan view showing still another example of a speaker.
FIG. 7 is a sectional view of FIG. 6;
8 is a cross-sectional view showing a use state of the speaker shown in FIG.
FIG. 9 is a cross-sectional view showing an example of a conventional speaker.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Speaker 2 Speaker main body 3 Frame part 4 Magnetic circuit part 5 Terminal parts 6, 7 Terminal board 10 Holder (mainly a holder)
11a Locking edge 12 Step 13 Swelling 14 Window 15 Sound emission hole

Claims (8)

The entirety of the main body of the small electric converter is held inside the holder integrally molded with the vibration damping material, and sound is emitted from the front and rear surfaces of the holder,
A small electric converter wherein a terminal plate is drawn out from a window formed at a required portion of the holder, and a tip end portion of the terminal plate extends on a rear surface of the holder. The small electric converter main body,
The small electric converter according to claim 1, which is a speaker. The small electric converter main body,
The small electric converter according to claim 1, which is a receiver. The terminal plate,
The small-sized electric converter according to claim 1, comprising a leaf spring or a coil spring. The holder is
It is made of vibration-absorbing material such as rubber, silicone resin, and vinyl chloride resin that absorbs vibration, and has a locking edge that extends in the axial direction integrally inside the front opening. The small electric converter according to claim 1. It is for holding the whole of a small electric converter inside,
It has an inner shape that is almost the same as the outer shape of the main body of a small electric converter that is used as an interior shell, has an opening on the front surface, and has a locking edge that extends in the axial direction along the edge portion. A holder for a small electric converter, wherein a holder main body having a sound emission hole and a window for extending a terminal plate to the outside is integrally formed of a vibration-proof material. A locking edge extending in the axial direction inside the opening on the front side of the cylindrical body holding the frame portion mainly composed of a small electric converter, and a magnetic circuit portion on the rear side through a horizontal step portion. The holder main body with the bulging part to hold is integrally molded with the vibration isolating material,
A small electrical converter holder, wherein a window for extending a sound emission hole and a terminal plate to the outside is formed in a part of the step portion. The vibration-proof material is
8. The small electric converter according to claim 6, wherein the material is a soft substance such as rubber, silicone resin, and vinyl chloride resin capable of absorbing vibration.

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