JP4680291B2 - Multifunctional vibration generator - Google Patents

Description

  The present invention can generate an acoustic vibration by a diaphragm vibrating body, and also requires a small mobile tool including a mobile phone using a resonance point found in relation to a natural frequency of a resonance vibration actuator. This is a technique related to a multi-function vibration generator that can reliably generate a frequency-sensitive body vibration.

  Various small mobile tools including a cellular phone have a manner mode function for notifying a person carrying a message such as an incoming call as vibration. The manner mode function is usually obtained by a vibration motor that can attach an eccentric weight to the rotation shaft of the motor and can generate vibration during the rotation.

  However, in the case of using the vibration motor, since it is necessary to increase the weight of the eccentric weight in order to obtain a practical vibration, there is a problem that the size and cost are increased accordingly.

  On the other hand, as a device that generates vibration without using such a vibration motor, there is also a resonance vibration actuator (speaker) added with a signal transmission function by mechanical vibration which is a vibration function. In the case of this method, not only the power consumption can be reduced, but also the number of mounted components can be reduced.

  As a method of driving such a resonance vibration actuator (speaker) with a vibration function, the resonance vibration actuator (speaker) is used by utilizing the lowest resonance frequency (100 to 200 Hz) of the resonance vibration actuator (speaker) itself. There is a method of driving the supporting housing itself.

However, the minimum resonance frequency of the resonant vibration actuator (speaker) depends on the manufacturing variation of the resonant vibration actuator (speaker) itself, the variation due to the temperature change of the resonant vibration actuator (speaker) itself, and the time-dependent change of the resonant vibration actuator (speaker) itself. Due to variations, variations in the case itself, variations due to temperature changes in the case itself, variations due to changes in the case over time, etc., the frequency fluctuates within a range of about 10 Hz from the set center frequency, and resonance cannot be obtained. In many cases, the sensory vibration is reduced.

On the other hand, in Patent Document 1 below, the influence of the variation due to the manufacturing variation of the minimum resonance frequency due to such a resonant vibration actuator (speaker) and the case, the variation in temperature, the variation with time, etc. is minimized, and the cost is low. A “multifunctional vibration actuator” that provides stable mechanical vibration with space saving and low power consumption is disclosed.
JP 2001-70880 A

  In the case of the “multifunctional vibration actuator”, a frequency detection circuit that detects the resonance frequency of the swing actuator, a frequency voltage conversion circuit that converts the frequency detected by the frequency detection circuit into a voltage, and the frequency A voltage control transmission circuit that changes the transmission frequency in accordance with the voltage value obtained by the voltage conversion circuit, and an amplifier using a normal phase amplifier and a negative phase amplifier that amplifies the output of the voltage control transmission circuit and supplies it to the vibration actuator It is said that the vibration actuator can be driven while the drive frequency is adjusted to the resonance frequency of the vibration actuator by the drive circuit configured.

However, in the case of "multi-function vibration actuator" disclosed in Patent Document 1, the frequency detection circuit and a frequency-voltage conversion circuit and a voltage controlled oscillation circuit and the amplifier and that consists of a driving circuit is required, If the drive circuit is not used, the drive frequency cannot be adjusted to the resonance frequency of the vibration actuator, and the circuit configuration becomes complicated.

In view of the above-described problems of the prior art, the present invention can generate high-frequency acoustic vibrations by a diaphragm vibrating body, and can use a resonance point found in relation to the natural frequency of a resonance vibration actuator to make a cellular phone. It is an object of the present invention to provide a multi-function type vibration generator capable of making subsequent adjustments and generating vibrations at a low frequency required by a small mobile tool including a device.

The present invention has been made to achieve the above object, and includes a diaphragm vibrating body having a cylindrical coil attached to the lower surface side of a diaphragm, and a magnetic circuit including at least a yoke and a permanent magnet magnetized in the thickness direction. A resonance vibration actuator having a magnetic gap in which the cylindrical coil is disposed in the unit, and a pair of lead terminals in which the other ends of a pair of lead wires each having one end connected separately to the cylindrical coil are connected to each other A plurality of elastic arm parts connected to a fixing plate having a cylindrical part at the center part, which is fixed to the outside and with its end side pulled out to the outside, and connected via a connecting part under a concentric positional relationship with the same radius loosely inserted arranged on the cylindrical portion while propped under a state of floating the resonant vibration actuator has a and is placed on the fixed plate via the outer periphery The resonance point determined by the relationship between the natural frequency of the resonant vibration actuator side while holding the elastic plate side and the fixed plate side separately from the elastic plate and the elastic arm portion, enables detection in the circumferential direction. The elastic plate and the fixing plate are configured at least with a resonance point adjusting body arranged to be movable, and even after each constituent member except the resonance point adjusting body is wrapped and integrated with a main body cover. wherein the resonance point adjusting member and the rotation operation in order to enable the post-adjustment of the resonance point position, characterized in construction that was placed in the resonance point adjusting member is exposed from the surface opening side of the body cover with respect to There is.

  The resonant vibration actuator is preferably provided with a side weight on the outer peripheral surface thereof.

  According to the present invention, the resonance point determined by the relationship with the natural frequency of the resonance vibration actuator is obtained by rotating the resonance point adjustment body along the elastic arm portion of the elastic plate elastically supporting the resonance vibration actuator side. Therefore, it is possible to provide a vibration generator that can easily obtain the most preferable resonance vibration for each product by simply rotating and adjusting the resonance point adjuster afterwards. Further, when a side weight is provided on the outer peripheral surface of the resonant vibration actuator, a stronger body vibration can be generated.

  FIG. 1 is an exploded perspective view showing a structural example of a member according to the present invention, and FIG. 2 is an end view showing an arrangement relationship between members after assembly. According to these figures, the multi-function vibration generator 11 includes at least a resonance vibration actuator 12, a diaphragm vibration body 22, a fixed plate 32, an elastic plate 42, and a resonance point adjustment body 52, and the resonance vibration actuator 12 is floated. The whole body is integrated with the main body cover 72 by interposing a spacer 62 between the elastic plate 42 and the fixed plate 32 and the diaphragm 23 which are overlapped via the outer peripheral edge portions 32a and 48 while being supported in a state. It is formed with.

Among these, resonance actuator 12 has one pole in the upper part, the other pole is its thickness direction to the magnetized ring-like permanent magnet 14 so as to be positioned on the lower part, iron etc. The magnetic circuit unit 13 is composed of a yoke 15 made of a magnetic material, and a side weight 20 fixed to the outer peripheral surface 18 of the magnetic circuit unit 13.

In this case, the yoke 15 has the same diameter as the outer diameter of the permanent magnet 14 and is magnetically attached so as to face the upper surface of the permanent magnet 14, and the horizontal extending from the lower surface side of the permanent magnet 14 in a slightly bowl shape. The upright surface portion 17b is erected from the outer edge side of the surface portion 17a, and the lower yoke portion 17 having a substantially U -shaped cross section having an opening 19 on the upper surface thereof.

  That is, the magnetic circuit unit 13 includes a continuous outer peripheral surface of the permanent magnet 14 and the upper yoke portion 16, and an inner diameter of the opening 19 of the lower yoke portion 17 that is larger than the outer diameter of the permanent magnet 14. A magnetic gap G is provided between the side yoke portion 17 and the inner surface of the upright surface portion 17b. The resonant vibration actuator 12 has a side weight 20 made of an appropriate metal having a relatively high specific gravity, such as iron or copper, fixed to the outer surface (outer peripheral surface 18) of the upright piece 17b in the lower yoke portion 17. It will be formed as a whole. The magnetic circuit unit 13 includes a loose insertion hole 13a formed of a circular hole of the same diameter provided in the permanent magnet 14, the upper yoke portion 16, and the lower yoke portion 17 at the axial center portion.

  The diaphragm vibrating body 22 includes a diaphragm 23 made of a thin resin film and the like, and a cylindrical coil 24 attached to the diaphragm 23 as a voice coil. In this case, the cylindrical coil 24 is attached to the lower surface side of the diaphragm 23 under a positional relationship that can be disposed in the magnetic gap G of the magnetic circuit unit 13.

  The fixing plate 32 made of an appropriate metal such as brass or white is arranged to fix the position of the elastic plate 42, and has an outer diameter smaller than that of the loose insertion hole 13a of the magnetic circuit unit 13. The cylindrical portion 33 is erected and formed in the central portion.

  Further, near the peripheral edge of the horizontal plane portion 34 of the fixing plate 32, there are provided three partial cutout portions 35 arranged at equal intervals and in a concentric positional relationship with the same radius. The part 35 is formed by an introduction hole 35a provided on one end side thereof and a guide groove hole 35b provided in the other end direction so as to communicate with the introduction hole 35a.

  Moreover, the fixed plate 32 is formed with a horizontal flange portion 37 raised from the step portion 36 at the outer peripheral edge portion 32a.

  Further, in the cylindrical portion 33 of the fixed plate 32, a pair of lead terminals 77 and 78 to which the other end portions 75b and 76b of the pair of lead wires 75 and 76 to which the one end portions 75a and 76a are separately connected are respectively connected. Are fixed so that the end portions 77a and 78a project outside as spring-like contact portions 79.

In this case, the pair of lead terminals 77 and 78 is formed by filling the cylindrical portion 33 with an insulating filler 80 such as an insulating resin material and fixing the position, or fixing the position with the insulating filler 80 in advance. In other words, the cylinder portion 33 is disposed by press-fitting into the cylindrical portion 33 later.

  The elastic plate 42 made of an appropriate metal such as phosphor bronze is formed so as to be integrally fixed to the main body cover 72 side together with the fixing plate 32 while elastically supporting the resonant vibration actuator 12 side.

  This will be described in detail with reference to the illustrated example. The elastic plate 42 having a surface size substantially matching the fixed plate 32 is located at the position of the partial notch 35 of the fixed plate 32 as shown in FIG. It is formed with three elastic arm portions 46 formed under a concentric positional relationship of substantially the same radius and facing each other.

  In this case, each elastic arm portion 46 is partitioned by a narrow cutout portion 45 with an insertion hole 47 formed between the main body portion 43 leaving the connecting portions 44 at both ends thereof, and each is formed. Has been. Note that each insertion hole 47 is formed in the elastic plate 42 under a positional relationship in which the respective insertion holes 35a of the fixing plate 32 are face-to-face with each other. The elastic plate 42 is provided with an insertion hole 42a having substantially the same diameter as the loose insertion hole 13a of the magnetic circuit unit 13 at the central portion of the shaft center.

  On the other hand, the resonance point adjusting body 52 made of a metal such as aluminum or a synthetic resin such as polycarbonate holds the elastic plate 42 separately from the elastic arm portion 46 via the fixed plate 32 and the natural frequency of the resonance vibration actuator 12. Therefore, the resonance point can be detected and can be rotated in the circumferential direction.

  That is, the resonance point adjusting body 52 has an opening 53 that is larger in diameter than the inner diameter of the loose insertion hole 13a of the magnetic circuit unit 13, and is slightly larger than the maximum diameter on the resonance vibration actuator 12 side. It is formed in a ring shape having a large outer diameter.

  In addition, in the resonance point adjusting body 52, the support holes that can be inserted through the introduction holes 35 a and the insertion holes 47 at positions facing the respective introduction holes 35 a of the fixing plate 32 and the insertion holes 47 of the elastic plate 42. Protrusions 54 are provided separately from each other.

  Each of the supporting protrusions 54 has the one open side edge 34a and the other open side edge 34b of the horizontal plane part 34 defining the guide groove 35b in the partial notch 35 at the front and rear positions in the radial direction. One side groove portion 55 and the other side groove portion 56 that are held separately are provided in the base portion 54a.

  In addition, in the upper portion 54b located above the one-side groove portion 55 and the other-side groove portion 56 in each supporting projection portion 54, a receiving groove portion 57 whose introduction opening 57a faces outward in the radial direction is provided as an elastic plate. It is formed so as to support the elastic arm portion 46 provided in 42 so as to sandwich it. The partial cutout portion 35 of the fixed plate 32, the elastic arm portion 46 of the elastic plate 42, and the supporting projection portion 54 of the resonance point adjusting body 52 are in a relationship formed in correspondence with the number and position thereof. In the illustrated example, three pieces are shown, but two pieces or four pieces or more may be used as desired.

  On the other hand, the spacer 62 made of an appropriate synthetic resin or a relatively light metal is formed in a ring shape having an opening 63 having a diameter larger than the maximum outer diameter on the resonance vibration actuator 12 side. In addition, the spacer 62 has a thickness that can secure a movable range in the vertical direction on the resonant vibration actuator 12 side, and the peripheral portion 23 a of the diaphragm 23 constituting the diaphragm vibrating body 22, and the resonant vibration actuator 12. The elastic plate 42 is interposed between the elastic plate 42 and the fixed plate 32 which are overlapped with each other through the outer peripheral edge portions 32a and 48 while being supported by each of them in a floating state.

The main body cover 72 made of an appropriate synthetic resin or metal is formed of a structural member including the diaphragm vibrating body 22, the elastic plate 42, and the fixing plate 32 disposed via the spacer 62, and the resonance point adjusting body 52 is opened on the lower surface. by wrapping from 72a side in the original state, which was issued dew, it is integrated in its entirety.

  That is, the main body cover 72 includes a top plate portion 73 with a sound passage hole 73 a that covers the diaphragm vibrating body 22, and a peripheral wall portion 74 that is suspended from the outer peripheral side of the top plate portion 73. The main body cover 72 presses the folded portion 74 b formed by folding the hem portion 74 a formed in a comb-tooth shape at the lower end portion of the peripheral wall portion 74 to the lower surface side of the horizontal flange portion 37 of the fixing plate 32. Thus, all the components except the resonance point adjusting body 52 are integrated.

Therefore, the resonance point adjustment member 52, the result is placed in out dew from the lower opening 72a side of the cover 72 so as to allow rotation with respect to the elastic plate 42 and the fixed plate 32, as appropriate times this The resonance point determined by the relationship with the natural frequency of the resonance vibration actuator 12 can be detected afterwards while being moved.

  The multifunction vibration generator 11 having such a configuration is assembled as a whole through the following procedure. That is, the insulating filler 80 having a pair of lead terminals 77 and 78 is fixed in position in the cylindrical portion 33 of the fixing plate 32.

  The resonant vibration actuator 12 forms a magnetic circuit unit 13 having a magnetic gap G by integrally magnetizing the permanent magnet 13 and the yoke 15, and a side weight 19 is provided on the outer peripheral surface 18 of the magnetic circuit unit 13. It is assembled by fixing.

  Specifically, an upper yoke portion 16 having the same outer diameter is formed on the upper surface of the permanent magnet 13, and a horizontal plane portion 17 a in the lower yoke portion 17 is disposed on the lower surface of the permanent magnet 13. The center positions are matched to each other and magnetized. At this time, since the outer diameter of the permanent magnet is smaller than the inner diameter of the opening of the lower yoke portion 17, the continuous outer peripheral surface of the permanent magnet 13 and the upper yoke portion 16 and the standing surface portion of the lower yoke portion 17. A magnetic gap G is formed between the inner peripheral surface of 17b.

  Further, the side weight 19 is fixed to the outer surface of the rising surface portion 17b of the lower yoke portion 17 constituting the outer peripheral surface 18 of the magnetic circuit unit 13, and the weight thereof is adjusted to increase or decrease as necessary. can do.

  In addition, the fixing plate 32 and the elastic plate 42 fed into the cylindrical portion 33 of the fixing plate 32 through the insertion hole 42a have a positional relationship in which the introduction holes 35a and the insertion holes 47 face each other. Thus, the outer peripheral edge portion 48 of the elastic plate 42 is placed on the horizontal flange portion 37 (outer peripheral edge portion 32a) of the fixed plate 32 to be combined.

  The resonance point adjusting body 52 is disposed by inserting each supporting protrusion 54 from the lower surface side of the fixed plate 32 into each introduction hole 35 a and each insertion hole 47 of the elastic plate 42.

  The resonance point adjusting body 52 is slightly rotated along the direction of the guide groove 35b of the partial notch 35 provided in the fixing plate 32, so that the one-side groove 55 provided in the supporting projection 54 has a partial notch. The one side open edge 34a partitioning the portion 35 can be combined with the other side groove 56 by introducing the other side open edge 34b.

  When the resonance point adjusting body 52 is slightly rotated in this way, the elastic arm portions 46 having the corresponding positional relationship of the elastic plate 42 are simultaneously introduced into the receiving groove portions 57 provided in the supporting projections 54 at the same time. Can be combined.

  On the other hand, the diaphragm vibrating body 22 in which one end portions 75a and 76a of the pair of lead wires 75 and 76 are connected to the cylindrical coil 24 side is connected to the other end portions 75b and 76b of the lead wires 75 and 76 as a pair of lead terminals 77 and 76, respectively. It is prepared after connecting to 78.

  The diaphragm 23 in the diaphragm vibrating body 22 is arranged along the inner side surface of the peripheral wall portion 74 in the main body cover 72 after the peripheral edge portion 23 a is arranged at the inner peripheral position of the top plate portion 73 in the main body cover 72. The spacer 62 is bonded so as to be pressed.

  The fixed plate 32, the elastic plate 42, and the resonance point adjusting body 52 after being combined are fed into the main body cover 72 after placing the resonance vibration actuator 12 side on the elastic plate 42.

At this time, the cylindrical coil 24 included in the diaphragm vibrating body 22 is introduced into the magnetic gap G. The outer peripheral portion 42a of the elastic plate 42 is disposed on the lower surface side of the spacer 62 under a state of being placed on the horizontal eaves portion 37 formed on the outer peripheral portion 32a of the fixed plate 32.

After each is arranged in such a positional relationship, the hem 74a of the peripheral wall 74 of the main body cover 72 is folded back inward so as to press the peripheral edge 32a side of the fixing plate 32. Thus, it is possible to obtain the multi-function type vibration generator 11 in which the folded portion 74b that supports and supports the whole is integrally formed. As shown in FIG. 2, the pair of lead terminals 77 and 78 is finally bent in the intersecting direction to form the spring contact portion 80.

  Next, the operation and effect of the multifunctional vibration generator 11 assembled in this way will be described. The vibration generator 11 is supplied with power through the spring contact portions 80 of the pair of lead terminals 77 and 78. By vibrating the diaphragm diaphragm 22 at an appropriate acoustic frequency of 150 Hz to several tens of KHz, voice vibration can be obtained.

Further, when the vibration generator 11 is used to give a manner mode function of notifying a person carrying a message such as an incoming call as a mechanical vibration to a small mobile tool including a mobile phone, a pair of lead terminals 77, low frequency 10~150Hz through the spring contacts 80 of the 78, for example, the resonance point are out dew from the lower opening 72a side of the cover 72 while vibrating the resonant vibration actuator 12 at a vibration frequency of 140Hz adjusting body 52 By artificially rotating the, it is possible to obtain complete resonance vibration and maximum sensible vibration.

  As described above, the resonance point adjusting body 52 supports the elastic arm portion 46 of the elastic plate 42 through the receiving groove portion 57 of each supporting projection 54 as is apparent from FIGS. 3 and 4. The arm length of the elastic arm portion 46 at the resonance point of the resonant vibration actuator 12 that is elastically supported by the elastic plate 42 can be detected afterwards while changing the support position.

  In addition, the resonant vibration actuator 12 includes a magnetic circuit unit 13 composed of an upper yoke portion 16, a permanent magnet 14, and a lower yoke portion 17, and a side weight 19 fixed to the outer peripheral surface 18 of the magnetic circuit unit 13. Since it is configured, its weight can be made relatively heavier than other components, and it can be vibrated as much as it resonates.

  In other words, even if the natural frequency on the resonance vibration actuator 12 side slightly varies due to various factors, the resonance point adjuster 52 sets the resonance point on the resonance vibration actuator 12 side afterwards so as to match the degree of the variation. By detecting and fixing the position of this, for example, it is possible to always generate a body vibration that is optimal for the manner mode function.

  Moreover, the vibration generator 11 can be reduced in weight as compared with a conventional vibration motor having an eccentric weight, and can be formed to be thin and small as a whole. It can be suitably incorporated into the tool.

  Therefore, according to the present invention, it is possible to provide a multi-function type vibration generator that combines both functions of sound and body vibration under a single unit having a function of adjusting the resonance point.

The perspective view which decomposes | disassembles and shows the member structural example of this invention. The end view which shows the arrangement | positioning relationship between the members after an assembly. The fragmentary perspective view which shows the arrangement | positioning relationship between the guide groove part of a fixed plate, the elastic arm part of an elastic board, and the projection part for support of a resonance point adjustment body. The principal part enlarged view of FIG.

DESCRIPTION OF SYMBOLS 11 Multifunctional vibration generator 12 Resonance vibration actuator 13 Magnetic circuit unit 13a Loose insertion hole 14 Permanent magnet 15 Yoke 16 Upper yoke part 17 Lower yoke part 17a Horizontal surface part 17b Standing surface part 18 Outer surface 19 Opening part 20 Side weight 22 Diaphragm Vibrating body 23 Diaphragm 23a Peripheral part 24 Cylindrical coil 32 Fixed plate 32a Outer peripheral part 33 Cylindrical part 34 Horizontal surface part 34a One side open edge part 34b Other side open edge part 35 Partial notch part 35a Introduction hole 35b Guide groove hole 36 Step part 37 Horizontal collar 42 Elastic plate 42a Insertion hole 43 Main body 44 Linking part 45 Narrow notch 46 Elastic arm 47 Insertion hole 48 Outer peripheral edge 52 Resonance point adjustment body 53 Opening 54 Supporting protrusion 54a Base 54b Upper part 55 One side groove part 56 Other side groove part 57 Receiving groove part 57a Introduction opening 2 spacer 63 opening 72 main cover 72a surface opening 73 top plate portion 73a sound hole 74 circumferential wall 74a skirt portion 74b folded portion
75, 76 Lead wire 75a, 76a One end portion 75b, 76b The other end portion 77, 78 Lead terminal 77a, 78a End portion 79 Spring contact portion 80 Insulating filler G Magnetic gap

Claims (2)

A diaphragm vibrating body having a cylindrical coil attached to the lower surface side of the diaphragm;
A resonant vibration actuator provided with a magnetic gap in which the cylindrical coil is disposed in a magnetic circuit unit including at least a yoke and a permanent magnet magnetized in the thickness direction;
A central portion is provided with a cylindrical portion in which a pair of lead terminals, each of which is connected to the other end of each of the pair of lead wires separately connected at one end to the cylindrical coil side, are fixed in position, and the end side is drawn out to the outside. A fixed plate,
A plurality of elastic arm portions connected via a connecting portion under a concentric positional relationship of the same radius and having a plurality of elastic arm portions supported by the resonant vibration actuator in a floating state while playing loosely on the cylindrical portion. is inserted arranged, and an elastic plate which is mounted on the fixing plate via the outer periphery,
While detecting the elastic plate side and the fixed plate side separately from the elastic arm portion, it is possible to detect the resonance point determined by the relationship with the natural frequency of the resonance vibration actuator side, and to turn in the circumferential direction And at least a resonance point adjusting body arranged,
Even after each component member excluding the resonance point adjustment body is wrapped and integrated with a main body cover , the resonance point adjustment body is rotated with respect to the elastic plate and the fixed plate, and the resonance point position is adjusted . A multi-function type vibration generator characterized in that the resonance point adjusting body is disposed so as to be exposed from the lower surface opening side of the main body cover so that post adjustment is possible. The multifunction vibration generator according to claim 1, wherein the resonance vibration actuator includes a side weight on an outer peripheral surface thereof.

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