JP3748637B2 - Vibration generator for portable devices - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pager (pager) and a portable small-sized information transmission device, and more specifically, transmits information to a pager, a mobile phone, and a human body by transmitting vibrations or sounds. The present invention relates to a vibration generating device in other portable devices having signal receiving and transmitting functions.
[0002]
[Prior art]
Conventionally, as this type of small-sized information transmission device having a function of generating vibration, a pager with a high penetration rate can be cited as a typical example, and the following description will focus on the pager.
[0003]
Originally, when the internal receiver received a radio call signal by phone, the pager generated a ringing tone to inform the mobile phone that the phone had been called. There was a problem that other people knew the necessity of communication. As a countermeasure, at present, in addition to notifying with sound, a function of generating vibration and notifying a carrier is provided, and either a sounding signal or a vibration calling signal can be selected. In these pagers, as a vibration device that generates vibrations that can be felt by the body, the one shown in FIG. 10 is conventionally used. In FIG. 10, 17 is a cylindrical coreless motor, 19 is a rotary shaft, 18 is an eccentric weight made of high-specific-polymerized gold such as tungsten, and a weight 18 is provided on the rotary shaft 19 protruding from the end face of the cylindrical coreless motor 17. Is attached and formed. The eccentric weight 18 has a semicircular shape or a fan plate shape for partial circular movement and eccentric vibration, and when the cylindrical coreless motor 17 is energized, the eccentric weight 18 rotates and becomes secondary. It is designed to generate vibration.
[0004]
[Problems to be solved by the invention]
However, the conventional vibration generator has the following problems with respect to the trend of downsizing portable devices such as pagers.
[0005]
(1) In a configuration in which an eccentric weight is attached to a cylindrical coreless motor, a large load is applied to the rotating shaft, so that it is not possible to sufficiently meet demands for further downsizing and long-term use.
[0006]
Moreover, in this structure, there exists a subject that an eccentric weight tends to remove | deviate from a rotating shaft, and it is necessary to assemble a great deal of time for quality control.
[0007]
(2) In the conventional configuration, a small speaker that generates sound is separately required, and the small speaker and the vibration generating device are separately incorporated, which is an obstacle to space saving in downsizing.
[0008]
In order to solve the above-mentioned problem, Japanese Patent Application No. 7-228138 provides a vibration generator having a structure capable of both calling by sound and calling by bodily sensation vibration, but leaves the following problems. ing.
[0009]
(1) When sensible vibrations are generated inside the vibration generator, the oscillating yoke portions move in directions other than the opposing elastic body direction due to the occasional unstable self-excited vibration. It may hit the body and generate abnormal noise.
[0010]
(2) When the vibration generator is attached to the portable device, the vibrating yoke portion must move smoothly in one direction regardless of the orientation of the portable device, but this is insufficient.
[0011]
(3) Even when a force is applied to the vibration generator from the outside, particularly when a drop impact is applied, the vibrating yoke portion must vibrate in the same direction, but this is insufficient.
[0012]
Accordingly, an object of the present invention is to solve the above problems.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is configured such that a pair of plate-like elastic bodies are supported by a frame body so as to face each other, and one plate-like elastic body has a yoke and a magnet. A first vibration system is configured by attaching a magnetic field generator having the above structure, and a second vibration system is configured by attaching a coil to the other plate-like elastic body, and the coil is disposed in the magnetic field of the magnetic field generator. A current having a different frequency is switchably applied to the coil through an oscillation circuit, and the first vibration system or the second vibration system is selectively resonated to generate vibrations of the respective resonance frequencies; and The plate-like elastic body constituting the first vibration system is configured to vibrate in the direction of the center line of the frame body, and the inner peripheral surface of the frame body is provided with a certain distance from the outer peripheral portion of the yoke. with disposing a soft elastic body, the distance between the soft elastic body and the yoke Ri is one of the vibration generator for portable devices, characterized in that to increase the distance between the distance and the yoke of the said magnet coil coil.
[0014]
According to the above invention, while having a compact and lightweight structure in which a coil and a magnetic field generator are built in, it is possible to generate two kinds of ringing signals, ringing sound and bodily sensation vibration, so that they can be used properly. whatever the orientation, or even drop impact or the like is applied, by the yoke in contact with the soft elastic body which is arranged inside the frame periphery, it is possible to prevent the occurrence of abnormal noise, the yoke And the magnet can be prevented from colliding with the coil and being damaged .
[0015]
In the invention according to claim 2 of the present application, a pair of plate-like elastic bodies are supported by the frame body so as to face each other, and a magnetic field generator having a yoke and a magnet is attached to one plate-like elastic body. The first vibration system is configured, a coil is attached to the other plate-like elastic body to form a second vibration system, the coil is arranged in the magnetic field of the magnetic field generator, and an oscillation circuit is connected to the coil. The first vibration system or the second vibration system is selectively resonated to generate vibrations of the respective resonance frequencies, and the first vibration system A plate-like elastic body configured to vibrate in the direction of the center line of the frame body, and a direction regulating member for regulating the plate-like elastic body to vibrate in the direction of the center line direction of the frame body. And this direction regulating member passes through the central part of the yoke Those of the vibration generator for portable devices, which is a the guide shaft.
[0017]
In the invention according to claim 3 of the present application, a pair of plate-like elastic bodies are supported by the frame so as to face each other, and a magnetic field generator having a yoke and a magnet is attached to one plate-like elastic body. The first vibration system is configured, a coil is attached to the other plate-like elastic body to form a second vibration system, the coil is arranged in the magnetic field of the magnetic field generator, and an oscillation circuit is connected to the coil. The first vibration system or the second vibration system is selectively resonated to generate vibrations of the respective resonance frequencies, and the first vibration system A plate-like elastic body configured to vibrate in the direction of the center line of the frame body, and a direction regulating member for regulating the plate-like elastic body to vibrate in the direction of the center line direction of the frame body. And this direction regulating member is the upper surface and the lower surface of the outer periphery of the yoke It is related with the vibration generator for portable devices characterized by being a pair of plate-shaped elastic support body which each hold | maintains to a frame.
[0019]
According to these inventions, it is possible to generate two kinds of ringing signals, ringing sound and body vibration, freely and selectively, while having a compact and lightweight structure in which a coil and a magnetic field generator are incorporated. Prevents excitation vibration and avoids the yoke vibrating in the direction of the center line of the frame body and coming into contact with the peripheral surface of the frame body regardless of the orientation of the device body or a drop impact. It is possible to prevent the generation of abnormal noise.
[0020]
As a specific configuration of the invention, mounting the yoke central portion and the outer peripheral portion is protruded toward the plate-like elastic body of the counterpart to the plate-like elastic bodies hand, by placing a magnet on an outer peripheral portion inside the yoke A first vibration system is configured, and a cylindrical coil is attached to the other plate-like elastic body so as to protrude toward the other plate-like elastic body, and the cylindrical coil is arranged on the inner peripheral side of the magnet and on the yoke. the second vibration system is constituted by arranging so as to be located on the outer peripheral side of the central portion, or Tsu the first vibration system constitute by that plate-like elastic body, a bottom surface of said top surface surrounding the top surface Preferably, it is formed of a hat-shaped metal elastic body having a connecting portion that connects the top surface and the bottom surface.
[0021]
In the above invention, as described in claim 4 , it is preferable to provide an annular groove for positioning the coil on the plate-like elastic body on which the coil is arranged, and the coil is plated without requiring a coil installation member separately. It can be positioned and attached to the elastic body, and has an effect that it is advantageous in terms of productivity and compactness.
[0022]
Furthermore, as described in claim 5 , it is preferable to incorporate the portable device vibration generating device of the present invention in a portable device such as a pager, and the two types of ringing sound and bodily sensation vibration are compact and lightweight. The signal can be used in a switchable manner, and it has an effect that it is possible to realize a portable device that does not generate an abnormal sound regardless of the orientation of the device at the time of carrying or an impact caused by dropping.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0024]
FIG. 1 is a sectional view of a first embodiment of the vibration generator of the present invention, and FIG. 2 is an exploded perspective view thereof. 1 and 2 are plate-like elastic bodies made of a metal plate such as a copper plate, 5 is a coil, 6 is a frame made of resin or metal, 7 is a magnetic field generator made of a yoke 3 and a magnet 4, and 8 is made of rubber or the like. A soft elastic body 9 and a bottom cover 9 respectively.
[0025]
The first plate-like elastic body 1 is provided on the bottom surface of the frame body 6 so that the periphery is sandwiched between the frame body 6 and the bottom cover 9, and is opposed to the plate-like elastic body 1. The second plate-like elastic body 2 is fixed to the top surface of the frame body 6 at the periphery thereof.
[0026]
The first plate-like elastic body 1 has a spiral shape when viewed from the plane, and a trapezoidal shape where the center rises when viewed from the cross section, and has a hole 1b at the center of the central portion 1a.
[0027]
The plate-like elastic body 1 vibrates the magnetic field generator 7 composed of the yoke 3 and the magnet 4 when the central portion 1a moves up and down with the above-described configuration.
[0028]
The yoke 3 mounted using the hole 1b in a form to be placed on the central portion 1a of the plate-like elastic body 1 is made of a magnetic material such as pure iron or permalloy, and has a disk-like conductor portion 3a. The center part 3b which protrudes upwards from this conductor part 3a, and the annular outer peripheral part 3c which is located in the outer periphery of the conductor part 3a and protrudes upwards are comprised. The yoke 3 has a convex portion 3d on the bottom surface, and the convex portion 3d is inserted into the hole 1b of the central portion 1a of the plate-like elastic body 1 and positioned.
[0029]
As described above, the convex portion 3d on the bottom surface of the yoke 3 is configured to be fitted into the hole 1b of the central portion 1a of the plate-like elastic body 1, so that productivity can be improved and cost can be reduced in the assembly process.
[0030]
An annular magnet 4 is fixed to the inner peripheral surface of the outer peripheral surface 3c of the yoke 3 with a gap between the conductor portion 3a, the N pole side is in contact with the inner peripheral surface of the outer peripheral portion 3c, and the S pole side is the yoke 3's side. It is provided at a constant interval toward the outer peripheral side of the central portion 3b. The annular magnet 4 is preferably made of, for example, a rare earth magnet material.
[0031]
The plate-like elastic body 2 installed on the top surface of the frame body 6 has an annular groove 2b for positioning at the center portion 2a, and the coil 5 protrudes downward while being held in the annular groove 2b. Is installed. The coil 5 is formed in a cylindrical shape using an enameled wire obtained by baking a resin on the surface of a copper wire. The coil 5 is disposed on the inner peripheral side of the magnet 4 so as to be positioned on the outer peripheral side of the central portion 3 b of the yoke 3, and is positioned in the magnetic field of the magnetic field generator 7 including the yoke 3 and the magnet 4.
[0032]
By providing the positioning annular groove 2b in the plate-like elastic body 2 as described above, the productivity can be improved in the assembly process of the coil 5 and the plate-like elastic body 2.
[0033]
In order to prevent damage to the coil 5, the distance X between the magnet 4 and the coil 5 and the distance Y between the central portion 3 b of the yoke 3 and the coil 5 are both between the soft elastic body 8 and the outer peripheral portion 3 c of the yoke 3. It is set to be larger than the distance Z.
[0034]
The plate-like elastic body 1 and the magnetic field generator 7 composed of the yoke 3 and the magnet 4 constitute a first vibration system, and the plate-like elastic body 2 and the coil 5 constitute a second vibration system. . When a current is passed through the coil 5 through the oscillation circuit, both vibrate due to the mutual magnetic action between the magnetic field generator 7 and the coil 5 arranged in the magnetic field, and vibrate the plate-like elastic body 1 or 2 to which each is attached. .
[0035]
The resonant frequency of the first elastic plate 1 with the magnetic field generator 7 installed is set to 50 to 150 Hz, and the resonant frequency of the second elastic plate 2 is set to 2 to 3 kHz. Yes. When a current having a predetermined frequency of 250 Hz or less is applied to the coil 5 through the oscillation circuit, the plate-like elastic body 1 resonates to generate vibrations felt by the body, and a current having a predetermined frequency of 600 Hz or more is applied to the coil 5. When energized, the plate-like elastic body 2 resonates and generates a ringing tone.
[0036]
By forming the annular magnetic field generator 7 with the yoke 3 and the magnet 4 as described above, there is less leakage magnetic flux compared with the configuration in which the magnet is arranged at the center of the yoke, and the point of magnetic efficiency and compactness. Is advantageous. Further, by forming the magnetic field generator 7 and the coil 5 in an annular shape, it is possible to prevent unstable vibration due to mass imbalance in the first vibration system, and to further improve productivity.
[0037]
An annular soft elastic body 8 is provided on the inner peripheral surface of the frame body 6 so as to be spaced apart from the outer peripheral portion 3 c of the yoke 3. The soft elastic body 8 absorbs the self-excited vibration of the yoke 3 regardless of the orientation of the vibration generator main body or a drop impact or the like, and the yoke 3 is attached to the inner peripheral surface of the frame body 6. Abnormal noise generated by contact is suppressed. As the soft elastic body 8, it is preferable to use a rubber-based sealing material or the like.
[0038]
The soft elastic body 8 is not limited to the one described above, and can have various shapes and configurations as shown in FIGS. As shown in FIG. 6, the soft elastic body 8 is arranged along each of the plate-like elastic bodies 1 and 2, and at that time, the soft elastic body 8 is overlapped with the upper and lower ends of the yoke 3. If it is formed to have a length, the vibration of the yoke 3 can be regulated in one direction without attenuating the vibration of the yoke 3, thereby preventing the generation of abnormal noise.
[0039]
Further, the soft elastic body 8 does not necessarily have an annular shape, and the dot-like protrusions as shown in FIGS. 7A and 7B or the vertical direction as shown in FIGS. 8A and 8B. Alternatively, the rod-like protrusions may be arranged intermittently on the circumference. If the intermittent projections are formed of resin or the like as described above, there is an advantage that the vibration of the yoke 3 is less attenuated than that of an annular one, and that it is easier to manufacture.
[0040]
Or as shown in FIG. 9, it is good also as a structure which provided the free end part 8a in the soft elastic body 8. FIG. In this case, the soft elastic body 8 may be annular or may be provided intermittently on the circumference. By providing the free end portion 8a, the vibration of the yoke 3 is absorbed more flexibly, so that the vibration is not attenuated and the vibration of the yoke 3 can be regulated in one direction.
[0041]
FIG. 3 is a sectional view showing a second embodiment of the vibration generator of the present invention. In the frame body 6, a lower end is fixed to the bottom cover 9, a guide shaft 10 is provided so as to penetrate the central portion of the yoke 3, and the vibration in the direction of the center line of the frame body 6 is regulated. The yoke 3 can always vibrate in one direction regardless of the orientation of the main body of the apparatus or a drop impact is applied, and abnormal noise caused by contact with the inner peripheral surface of the frame body 6 can be generated. It has a configuration to suppress. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
[0042]
FIG. 4 is a sectional view showing a third embodiment of the vibration generator of the present invention. A pair of left and right band plate-like elastic supports 11a and 11b are attached to the upper surface and the lower surface of the outer peripheral portion 3c of the yoke 3 in the frame 6, respectively, and the yoke 3 is spaced from the inner peripheral surface of the frame 6 at a constant interval. The yoke 3 is always vibrated in one direction regardless of the orientation of the apparatus main body or a drop impact or the like by restricting the vibration in the center line direction of the frame body 6 by being provided and held. Therefore, it is configured to suppress the generation of abnormal noise caused by contact with the inner peripheral surface of the frame body 6. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
[0043]
FIG. 5 shows an example of a configuration in which currents having different frequencies are provided to the coil 5 through the oscillation circuit 16 in a switchable manner. In FIG. 5, 5 is a cylindrical coil, 15 is a DC power source, 16 is an oscillation circuit composed of a CPU 14, a transistor 13, resistors 12a and 12b, and the like.
[0044]
A pulse signal that repeats energization and deenergization is applied from the CPU 14 to the transistor 13, and a current having the same frequency as the frequency of the pulse signal flows through the coil 5. When the coil 5 is energized, the yoke 3 provided with the magnet 4 and the coil 5 are vibrated by electromagnetic force, and this vibration is transmitted to the first plate-like elastic body 1 and the second plate-like elastic body 2. Next, the first vibration system or the second vibration system vibrates. The CPU 14 is configured so that the frequency of the pulse signal can be selected from either a first frequency for resonating the first vibration system or a second frequency for resonating the second vibration system.
[0045]
When the CPU 14 gives a pulse signal having a first frequency to the transistor 13 and energizes the coil 5 at a frequency of 100 Hz in accordance with the resonance frequency of the first vibration system, for example, the device itself resonates via the elastic plate 1. Resonates in synchronism with the frequency and generates vibrations. Thereby, a caller can be called without causing trouble to others with no sound.
[0046]
On the other hand, when the CPU 14 gives a pulse signal of the second frequency to the transistor 13 and energizes the coil 5 at a frequency of 2.7 kHz in combination with the resonance frequency of the second vibration system, for example, the device is connected via the plate-like elastic body 2. Since it resonates in synchronization with the resonance frequency and acts as a speaker, it can generate a ringing tone.
[0047]
The frequency setting for each of the first and second vibration systems is preferably set to a frequency of 250 Hz or less for experiencing vibrations and a frequency of 600 Hz or more for generating ringing sounds. This is because vibrations with a frequency of 250 Hz or less cannot be heard by human ears and only mechanical vibrations can be transmitted to the body based on the ISO 226 (1961) equal landness curve, and vibrations with a frequency of 600 Hz or more are low. This is because it can be heard by the human ear at the sound pressure level.
[0048]
Since two types of calling signals can be generated by one vibration generator as described above, it is possible to realize a vibration generator that is smaller, lighter, and has a larger vibration than the conventional example described above. Become.
[0049]
The vibration generator can be used by being incorporated in a portable device such as a pager or a wristwatch. For example, it can be configured such that a pager's carrier can select either a ringing tone or a body vibration with a changeover switch. Alternatively, the first frequency pulse signal and the second frequency pulse signal from the CPU 14 may be alternately generated at fixed time intervals so that both the ringing tone and the body vibration are generated alternately. it can.
[0050]
【The invention's effect】
The vibration generator for portable devices of the present invention can generate two types of ringing signals, ringing sound and bodily sensation vibration, while using a compact and lightweight structure.
[0051]
In addition, the magnetic field generator is prevented from coming into contact with the peripheral surface of the frame, regardless of the orientation of the vibration generator body or a drop impact, etc. Therefore, the generation of abnormal noise can be prevented.
[0052]
Furthermore, by incorporating the vibration generating device of the present invention in a portable device such as a pager or a wristwatch, the portable device has two types of calling signal functions of ringing sound and body vibration and can prevent the generation of abnormal noise. Can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a vibration generator for portable equipment according to the present invention.
FIG. 2 is an exploded perspective view of the same.
FIG. 3 is a cross-sectional view showing a second embodiment of the vibration generator for portable equipment of the present invention.
FIG. 4 is a cross-sectional view showing a third embodiment of the vibration generator for portable equipment of the present invention.
FIG. 5 is a schematic diagram showing an oscillation circuit of a vibration generator for portable equipment according to the present invention.
FIG. 6 is a cross-sectional view showing a modified example of the first embodiment of the vibration generator for portable devices of the present invention.
7A and 7B show a modification of the first embodiment of the vibration generator for a portable device of the present invention, where FIG. 7A is a plan view and FIG. 7B is a perspective view.
FIGS. 8A and 8B show a modification of the first embodiment of the vibration generator for portable equipment of the present invention, wherein FIG. 8A is a plan view and FIG. 8B is a perspective view.
FIG. 9 is a cross-sectional view showing a modification of the first embodiment of the vibration generator for portable devices of the present invention.
FIG. 10 is a perspective view showing a conventional pager vibration generator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plate-shaped elastic body 2 Plate-shaped elastic body 3 Yoke 4 Magnet 5 Coil 6 Frame body 7 Magnetic field generator 8 Soft elastic body 10 Guide shaft 11 Plate-shaped elastic support body 16 Oscillation circuit

Claims (5)

A pair of plate-like elastic bodies are supported by the frame so as to face each other, and a magnetic field generator having a yoke and a magnet is attached to one plate-like elastic body to constitute the first vibration system, and the other A coil is attached to the plate-like elastic body to form a second vibration system, the coil is placed in the magnetic field of the magnetic field generator, and currents having different frequencies are given to the coil through an oscillation circuit so as to be switched, A plate-like elastic body configured to selectively resonate one vibration system or the second vibration system to generate vibrations of the respective resonance frequencies, and to constitute the first vibration system is a frame body The soft elastic body is disposed on the inner peripheral surface of the frame body at a certain distance from the outer peripheral portion of the yoke, and the yoke and the soft elastic body From the distance, the distance between the magnet and the coil and the yoke and the front Vibration generator for portable devices, characterized in that to increase the distance between the coils. A pair of plate-like elastic bodies are supported by the frame so as to face each other, and a magnetic field generator having a yoke and a magnet is attached to one plate-like elastic body to constitute the first vibration system, and the other A coil is attached to the plate-like elastic body to form a second vibration system, the coil is placed in the magnetic field of the magnetic field generator, and currents having different frequencies are given to the coil through an oscillation circuit so as to be switched, A plate-like elastic body configured to selectively resonate one vibration system or the second vibration system to generate vibrations of the respective resonance frequencies, and to constitute the first vibration system is a frame body And a direction restricting member for restricting the plate-like elastic body to vibrate in the direction of the center line of the frame , and the direction restricting member covers the central portion of the yoke. that the guide shaft arranged to pass through Vibration generator for portable devices to butterflies. A pair of plate-like elastic bodies are supported by the frame so as to face each other, and a magnetic field generator having a yoke and a magnet is attached to one plate-like elastic body to constitute the first vibration system, and the other A coil is attached to the plate-like elastic body to form a second vibration system, the coil is placed in the magnetic field of the magnetic field generator, and currents having different frequencies are given to the coil through an oscillation circuit so as to be switched, A plate-like elastic body configured to selectively resonate one vibration system or the second vibration system to generate vibrations of the respective resonance frequencies, and to constitute the first vibration system is a frame body And a direction restricting member for restricting the plate-like elastic body to vibrate in the direction of the center line of the frame, and the direction restricting member includes an outer peripheral portion of the yoke. A pair of plates each holding the upper and lower surfaces of the frame to the frame Vibration generator for portable equipment characterized in that an elastic support. Provided positioning annular groove of the coil plate-like elastic member disposed coils, portable apparatus for the vibration generator of the annular groove by utilizing the claims 1, 2 or 3, wherein the holding said coil. A portable device incorporating the vibration generator for a portable device according to any one of claims 1 to 4 .

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