JP2003225613A - Axial direction driven vibrating body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the mounting of a vibrating body used for a portable equipment. <P>SOLUTION: In the axial direction driven vibrating body, a cylindrical driving coil 12 is fixed to one side end of a cylindrical frame 11 and a driving piece is formed by a cup shaped yoke 21 which is made by magnetic material that is magnetically engaged with the coil 12 through gaps 26 and 27 and a pillar- shaped permanent magnet 22. A vibration motor 10 is arranged so that the driving piece 20 vibrates along the axial direction by a pair of coil springs 24 and 25 which are provided on both side ends of the frame 11. Leaf spring terminals 41a and 41b are disposed on the outer peripheral section of the frame 11 so that the mounting surface height to a circuit substrate is reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a vibrating body used in a portable device or the like for allowing a wearer to sense an incoming call silently.

2. Description of the Related Art Conventionally, the use of portable devices is often restricted in vehicles such as public places, hospitals, and trains / buses. In particular, even when the use of a mobile device is permitted, a method is used in which the wearer senses an incoming call in a so-called manner mode (silence / feeling vibration). Various products have become popular as mobile devices reflecting recent technological advances, such as mobile phones, PDAs, and wearable computing devices. For these, a vibration motor that silently senses the body vibration and a multi-function device (having both a speaker function and a vibrating body function) having a function similar to that are used.
What is considered to be a typical example of the conventional vibration motor will be described below.

[0002] As a conventional example, Practical Publication Heisei 3-836
No. 81 (hereinafter referred to as Document A), JP-A-7-1076.
No. 99 (reference B), Japanese Patent Publication No. 8-10972 (reference C)
Will be explained. Document A uses an axial length type DC motor having a brush and a commutator, and relates to an eccentric weight having a fan-shaped cross section attached to a rotary shaft of a vibration motor. The eccentric weight has a high specific gravity but is difficult to process, and is made of a powdered sintered alloy of a metal containing tungsten and lead instead of a bulk material that is difficult to process. It is intended to increase the output.

Document B is a vibration motor using an axial length type DC motor having a brush and a commutator as outlined in FIG. 12, and relates to the disclosure of the structure of an eccentric weight and a method of fixing it to a rotary shaft. is there. In FIG. 12, a rotary shaft 136 supported by a bearing 133 of a DC motor 131 is provided with a groove 135 smaller than the outer diameter of the rotary shaft 136, and an eccentricity made of a powder sintered alloy such as tungsten formed of a high specific gravity material. The weight 134 is caulked by the caulking portion 140 into the groove 135 of the rotating shaft 136. Therefore, the both ends of the eccentric weight 134 in the axial direction do not rise, and the eccentric weight 134 is reliably rotated.
Since it is fixed to 36, the output can be increased despite the small size. In addition, a porous eccentric weight 13
It is described that No. 4 is impregnated with oil and has a rust preventive effect without surface treatment by plating.

Document C relates to a flat type DC motor having a brush and a commutator, and has a rotor configuration in which at least three coils having an opening angle of 60 to 80 are arranged in a fan shape so as not to overlap each other. Form an eccentric weight.

[0005]

Documents A, B, and C are premised on the rotation of a DC motor, and although there are differences between the long axis type and the flat type, they have the following problems. (1)
Since a brush and a commutator are used, it is costly and there is a problem in maintenance of life and quality due to damage caused by micro-arc during rectification. (2) It is not suitable for a device that takes a long time to rise up to 7,000 to 8,000 rpm and generates vibration in accordance with music. In recent years, portable devices equipped with vibration motors have improved space efficiency to be smaller and thinner, and at the same time have a simple and reliable electrical and mechanical connection method to the circuit board of the portable devices. Required for vibration motors. An object of the present invention is to eliminate the above-mentioned drawbacks and propose a connecting terminal and a connecting method of an axial vibration motor which can reduce the mounting height on a circuit board of a diversified portable device with a simple configuration. .

[0006]

A vibrating body according to the present invention, which has been made to solve the above-mentioned problems, has a cylindrical driving coil fixed to one end of a cylindrical frame, A driver element formed of a cup-shaped yoke made of a magnetic material and a cylindrical permanent magnet that magnetically engages each other via a gap is provided with a pair of coil springs provided at both ends of the frame to move the driver element in the axial direction. In a vibration motor arranged so as to vibrate, electrical connection terminals are arranged on an outer peripheral portion of the frame so that a height of a mounting surface on a circuit board is reduced.

In order to solve the problem, a connecting terminal of a vibrating body according to a second aspect of the present invention has a pair of leaf springs in a direction of pressing to the circuit board on either end face or bottom face in the axial direction of the frame. Is formed.

A vibrating body connection terminal according to a third aspect of the present invention, which has been made to solve the problems, has a spring property in a direction in which a pressure is applied to a circuit board on either end face or bottom face in the axial direction of the frame. It is characterized by being formed by a pair of coil springs.

A vibrating body connection terminal according to a fourth aspect of the present invention, which has been made to solve the problems, has a spring property in a direction in which a pressure is applied to a circuit board on either end face or bottom face in the axial direction of the frame. It is characterized by being formed by a pair of spiral springs.

The vibrating body connection terminal according to claim 5 of the present invention made to solve the problems is characterized in that at least a pair of lead frames are formed at both ends of the bottom surface of the frame. .

The connecting terminal of the vibrating body according to claim 6 of the present invention made to solve the problems is characterized in that it is formed of at least a pair of conductive sheets on both ends of the bottom surface of the frame. is there.

The connection terminal of the vibrating body according to claim 7 of the present invention made to solve the problem is to be connected to the circuit board by a connector via a lead wire on either end face in the axial direction of the frame. It is a feature.

The connecting terminal of the vibrating body according to the eighth aspect of the present invention made to solve the problems is characterized in that it is connected to the bottom surface of the frame through a through hole of the circuit board.

According to a ninth aspect of the present invention, there is provided a connection terminal for a vibrating body according to the present invention, wherein a pair of terminals are provided on the outer peripheral portions of both axial ends of the frame by plating or the like. Is sandwiched by semi-annular springs and connected to the circuit board.

The connection terminal of the vibrating body according to claim 10 of the present invention made to solve the problems is characterized in that probe pins are arranged on at least one end of both axial end faces or bottom face of the frame. It is a thing.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an axially driven vibrator according to the present invention will be described below with reference to the drawings. FIG. 1 shows an axially driven vibrating body of the present invention (abbreviated as vibrating body below).
It is a structure half cross-sectional view of. FIG. 2 is a sectional view taken along line XX of FIG. FIG. 3B is an external side view of the connection terminal arranged on the vibrating body of the present invention. FIG. 3A is a left side view of FIG. 3B. (However, the detailed view of the half section is omitted.) FIG. 4B is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 4A is a left side view of FIG. 4B. FIG. 5B is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 5A is a left side view of FIG. 5B. FIG. 6 is a perspective view of the connection terminal arranged in the vibrating body of the present invention. FIG. 7B is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 7A is a left side view of FIG. 7B. FIG. 8 is a perspective view of the connection terminal arranged in the vibrating body of the present invention. FIG. 9 is a perspective view of the connection terminal arranged in the vibrating body of the present invention. FIG. 10 is a perspective view of the connection terminal arranged in the vibrating body of the present invention. FIG. 11B is an external side view of the connection terminal provided in the vibrating body of the present invention. Figure 1
1 (a) is a left side view of FIG. 11 (b).

1 and 2, the vibrating body 10 of the present invention.
Is composed of a cylindrical frame 11 made of synthetic resin, a drive coil 12, and a driver element 20. At one end of the frame 11 in the axial direction, a magnet wire is wound around a cylindrical coil bobbin 13 whose surface is electrically insulated by anodizing a metal material such as aluminum having good heat conductivity. The drive coil 12 with 36 is cantilevered. The driver element 20 has a cylindrical permanent magnet 22 axially magnetized with a single magnetic pole fixed in a cantilever manner at the center of a cup-shaped yoke 21 made of a magnetic material. A weight 23 having a large mass, for example, formed by resin molding of tungsten powder, is fixed to this by an adhesive or the like. Guide protrusions (14a, 14b, 14c) are arranged at right angles to the axial direction on the inner peripheral surface of the frame 11 so that the driver 20 can be smoothly driven in the axial direction. Then, the convex portions 14a, 14b, 14 are arranged parallel to the axial direction.
c are formed in the same row. Further, the drive coil 12 and the driver element 20 are magnetically engaged with each other through the circumferential gaps 26 and 27 parallel to the axial direction. Further, the driver 20 is supported by coil springs 24 and 25 provided at both ends of the frame 11. The primary resonance frequency of the driver element 20 is determined by the mass of the driver element 20 and the stiffness of the coil springs 24 and 25, and is 100 to 160H which is considered to be good for the wearer.
set to z. The driver 20 is a pair of coil springs 2.
It is normally stopped at the equilibrium point by 4,25. As will be described in detail with reference to FIG. 3, leaf spring terminals 41a and 41b are provided on the bottom surface of the outer end of the frame 11.

In FIG. 2, the driver 20 is provided with grooves 31a, 31b and 31c parallel to the axial direction, and the frame 1
The convex portions 14a, 14b, 14c of No. 1 are grooves 31a, 31 respectively.
The sliding engagement is made mechanically corresponding to b and 31c. As a result, when the driver element 20 reciprocally vibrates in the axial direction, efficient reciprocal vibration in the axial direction is generated without causing pitching, rolling and yawing. Further, when the weight 23 is mounted, the vibration vibration force can be further increased.

In FIGS. 3A and 3B, the vibrating body 10 is used.
A pair of terminals 35, 36 of the voice coil 12 (not shown) are connected inside the frame 11 of the vibrating body 10 on either end face or bottom face in the axial direction of the plate spring terminal (hereinafter referred to as a leaf spring terminal). Abbreviated as connection terminal) 41a, 41
The outer end of b is pressed and connected by another member (not shown) so as to obtain a contact pressure toward the land (not shown) of the circuit board. In this case, the connection terminal 41
The a and 41b and the land of the circuit board are also applied to a method such as soldering or adhesion of a conductive agent, which can obtain reliability. Further, the leaf spring does not necessarily have to be a metallic material.

In FIGS. 4A and 4B, the vibrating body 10 is used.
A coil spring terminal 42 in which a conductive metal is used as a pair of connection terminals on either axial end surface or bottom surface of the
Voice coil 12 not shown at one end of a and 42b
The terminals 35, 36 of the above are connected in the frame 11 of the vibrating body 10, and the connection terminals 42a, 42b are not shown so that contact pressure is obtained toward the land (not shown) of the circuit board. The members are pressed and connected to each other. In this case, the connection terminals 42a and 42b and the land of the circuit board are applied to a method such as soldering or adhesion of a conductive agent, which provides reliability. Further, the connection terminals 42a and 42b do not necessarily have to be made of a metal material.

In FIGS. 5A and 5B, the vibrating body 10 is used.
Although not shown, the terminals 35, 36 of the voice coil 12 are provided at one end of the conical spiral spring terminals 43a, 43b whose surface is treated with a conductive metal as a pair of connection terminals on either end surface or bottom surface in the axial direction. The connection terminals 43a and 43b are connected in the frame 11 of the vibrating body 10 and are pressed by another member (not shown) so that a contact pressure is obtained toward the land (not shown) of the circuit board. Connected. In this case, the connection terminals 43a and 43b and the land of the circuit board are applied to a method such as soldering or conductive agent bonding, which provides reliability. Also, the connection terminals 43a and 43b are
It does not necessarily have to be a metallic material.

In FIG. 6, lead frame terminals 44a, 44b, 44c, 4 are provided on both ends of the bottom surface of the vibrating body 10 which are surface-treated with a conductive metal to be at least a pair of connection terminals.
Although not shown at one end of 4d, the terminals 35 and 36 of the voice coil 12 are connected in the frame 11 of the vibrating body 10, and the connection terminals 44a, 44b, 44c and 44d are lands (not shown) of the circuit board. Connected towards. In this case, the connection terminals 44a, 44b, 44c, 44d and the lands of the circuit board are applied to a method such as soldering or adhesion of a conductive agent to obtain reliability.

In FIGS. 7A and 7B, the vibrating body 10 is used.
Sheet terminals 45a, 45 having surface treatment of at least a pair of connecting terminals on both ends of the bottom surface of the sheet
Although not shown at one end of b, 45c, 45d, the terminals 35, 36 of the voice coil 12 are connected to the frame 1 of the vibrating body 10.
1 connected to each other and connecting terminals 45a, 45b, 45
c and 45d are connected to a land (not shown) of the circuit board by a pressing force by another member not shown.

In FIG. 8, the terminals 35 and 36 of the voice coil 12 are connected to the pair of lead wires 46a, which are connected in the frame 11 of the vibrating body 10, though not shown on either end face in the axial direction of the vibrating body 10. 46b is connected to the connector 47 and is inserted and connected to a connector pin (not shown) of the circuit board.

In FIG. 9, the terminal 3 of the voice coil 12 (not shown) is provided on the bottom surface of the vibrating body 10.
The terminals on the bottom surface of the frame 11 of the vibrating body 10 to which 5, 36 are connected are the plurality of through-hole terminals 49 of the circuit board.
It is connected to a, 49b, 49c, 49d by surface mounting.

In FIG. 10, the terminals 35 and 36 of the voice coil 12 are connected inside the frame 11 of the vibrating body 10 though not shown at either of the outer peripheral portions on both axial ends of the vibrating body 10. The terminals 50a and 50b are sandwiched by semi-annular springs 51a and 51b.

In FIGS. 11A and 11B, the vibrating body 1 is used.
Although not shown in the drawings, at least one end of both axial end surfaces or bottom surface of the 0, the pair of probe pin terminals 52a and 52b, in which the terminals 35 and 36 of the voice coil 12 are connected in the frame 11 of the vibrating body 10, are the lands of the circuit board. (Not shown)
It is pressed and connected by another member not shown so as to obtain the contact pressure toward the connection. In this case, the connection terminals 52a and 52b and the land of the circuit board are applied to a method such as soldering or adhesion of a conductive agent, which ensures reliability.

[0028]

According to the vibrating body connection terminal of the present invention, a vibrating body for portable equipment having a simple structure, good cost / performance, no sound, and excellent sensation characteristics can be easily electromechanically formed on a circuit board. Can be reliably connected to.

Further, according to the vibrating body connection terminal of the present invention, the mounting is simplified, and at the same time, the portable device can be easily reduced in size and thickness, so that the practical effect is remarkable.

[Brief description of drawings]

FIG. 1 is a half cross-sectional view of the configuration of an axially driven vibrating body (hereinafter abbreviated as vibrating body) of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 (b) is an external side view of a connection terminal arranged in the vibrating body of the present invention. FIG. 3A is a left side view of FIG.

FIG. 4 (b) is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 4A is a left side view of FIG.

FIG. 5 (b) is an external side view of a connection terminal provided in the vibrating body of the present invention. FIG. 5A is a left side view of FIG.

FIG. 6 is a perspective view of a connection terminal arranged in the vibrating body of the present invention.

FIG. 7 (b) is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 7A is a left side view of FIG. 7B.

FIG. 8 is a perspective view of a connection terminal provided in the vibrating body of the present invention.

FIG. 9 is a perspective view of a connection terminal provided in the vibrating body of the present invention.

FIG. 10 is a perspective view of a connection terminal provided in the vibrating body of the present invention.

FIG. 11 (b) is an external side view of the connection terminal arranged in the vibrating body of the present invention. FIG. 11A is a left side view of FIG. 11B.

FIG. 12 is a perspective view of a conventional vibration motor.

[Explanation of symbols]

10 Vibrating body 11 frames 12 drive coil 13 coil bobbin 14a, 14b, 14c guide protrusion 20,40 driver 21 cup-shaped yoke 22 Cylindrical permanent magnet 23 Weight 24 25 coil spring 26,27 void 31a, 31b, 31c Groove 35, 36 terminals 41a, 41b leaf spring terminals 42a, 42b Coil spring terminals 43a, 43b conical spiral spring terminal 44a, 44b, 44c, 44d Lead frame terminal 45a, 45b, 45c, 45d Conductive sheet terminal 46a, 46b Lead wire 47 connector 49a, 49b, 49c, 49d Through hole terminals 50a, 50b connection terminal 51a, 51b semi-annular spring 52a, 52b probe pin terminals

Continued front page    (72) Inventor Giju Miura             Yamanashi Prefecture Fujiyoshida City Kamigure 1-23-1             Citizen Electronics Co., Ltd. F term (reference) 5D107 AA12 AA13 BB08 CC09 DD03                 5H605 AA07 BB18 CC06 DD09 EC05                       EC08 EC12 EC13

Claims (10)

[Claims] 1. A cup-shaped yoke and a columnar permanent magnet made of a magnetic material, in which a cylindrical drive coil is fixed to one end of a cylindrical frame and magnetically engaged with the drive coil through a gap. In a vibration motor in which the driver element formed in (1) is arranged so that the driver element vibrates in the axial direction by a pair of coil springs provided at both ends of the frame, the mounting surface height on the circuit board is reduced. An axially driven vibrating body, characterized in that electrical connection terminals are provided on the outer peripheral portion of the frame. 2. The connecting terminal of the axially driven vibrating body,
The axially driven vibrating body according to claim 1, wherein a pair of leaf springs are formed in a direction in which they are pressed against the circuit board on either end surface or bottom surface in the axial direction of the frame. 3. The connection terminal of the axially driven vibrating body,
The vibrating body driven in the axial direction according to claim 1, wherein the vibrating body driven in the axial direction is formed by a pair of coil springs having a spring property in a direction of pressing the circuit board on either end surface or bottom surface in the axial direction of the frame. 4. The connecting terminal of the axially driven vibrating body,
The vibrating body driven in the axial direction according to claim 1, wherein the vibrating body driven in the axial direction is formed by a pair of spiral springs having a spring property in a direction in which the circuit board is pressed against either end surface or bottom surface in the axial direction of the frame. 5. The connecting terminal of the axially driven vibrating body,
The vibrating body driven in the axial direction according to claim 1, wherein at least a pair of lead frames are formed at both ends of the bottom surface of the frame. 6. The connection terminal of the axially driven vibrating body,
The axially driven vibrator according to claim 1, wherein at least a pair of conductive sheets are formed on both ends of the bottom surface of the frame. 7. The shaft according to claim 1, wherein the axially driven vibrating body connecting terminal is connected to the circuit board by a connector via a lead wire on either end face in the axial direction of the frame. Directionally driven vibrator. 8. The connection terminal of the axially driven vibrating body,
The axially driven vibrator according to claim 1, wherein the vibrator is connected to the bottom surface of the frame through a through hole of a circuit board. 9. The connecting terminal of the axially driven vibrating body,
The shaft according to claim 1, wherein a pair of terminals are arranged on the outer peripheral portions of both axial end portions of the frame by plating or the like, and the terminals are sandwiched by semi-annular springs to be connected to a circuit board. Directionally driven vibrator. 10. The axial drive according to claim 1, wherein the connection terminal of the axially driven vibrating body is provided with a probe pin on at least one end of both axial end faces or a bottom face of the frame. Vibrating body.