JP2007306747A - Structure for mounting vibration generator in portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve high reliability in connection between a power feeding terminal and a power feeding land of a circuit board, and stable feed power, and reduce thickness and save space when a vibration generator is mounted. <P>SOLUTION: A band-like terminal piece of the power feeding terminal is positioned in the vertical direction relative to the power feeding land face of the circuit board. Part of the terminal piece in the lenghwise direction is provided with a raised area protruded outward from an end face of a terminal block. When the vibration generator is incorporated into the enclosure frame of a portable terminal device, the raised area of the terminal piece is pushed by external force from a wall of the enclosure frame. Thus, the raised area is crushed and elastically deformed in the lengthwise direction. As a result, the tip of the terminal piece is stretched in the vertical direction, and its contact is pushed out toward the circuit board. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable terminal of a vibration generating device that operates with a silent alarm function mainly mounted on a portable terminal device (including electronic devices such as a portable phone, a PHS, a small wireless communication device, and other portable information communication terminals). It relates to the mounting structure on equipment.

  For example, in a quiet public place where people gather in libraries, museums, concert halls, ceremonies, etc., and in the public transportation vehicle, sudden ringtones from mobile terminal devices can cause great inconvenience to the people around you. There is a case. For this reason, a silent alarm function using a vibration generating device that notifies an incoming call notification through vibrations is provided in various portable terminal devices.

  The vibration generator is roughly divided into two types: a vibration motor type and a vibration actuator type. The former attaches a weight with an eccentric center of gravity to the output rotation shaft of a small motor, and uses the uneven force that the center of gravity such as the eccentric weight swings around during the rotation of the rotor to vibrate the mobile terminal device body such as a mobile phone. It has been installed in mobile phones for a long time.

  In the latter case, for example, as shown in FIG. 12, a magnetic circuit portion W, which is a weight portion combining a magnet 206, a yoke 207, and a pole piece 208, is resonated by the electromagnetic force of the coil 210 on the opposite diaphragm 209 side. A vibration actuator 201 having a so-called speaker function that reciprocates in the state supported by 211 to obtain a vibration force.

  In recent years, this vibration actuator has been attracting attention as a vibration generator united with a multi-function of speaker, buzzer, and vibration, and is beginning to be installed in the latest mobile phones.

  On the other hand, in the mobile terminal device, various methods for supplying power and mounting structures from the device-side power supply (mainly circuit board) to the vibration generator have been improved. For example, instead of the wiring method of soldering lead wires, a power supply terminal structure using a pressing force by a leaf spring, and recently a direct solder mounting structure to the circuit board side by solder reflow has been newly introduced by some manufacturers It has been adopted.

  For example, as a power supply method and mounting structure of a vibration motor which is a general vibration generator, a plate spring-shaped power supply terminal structure as shown in FIGS.

  The leaf spring-like power supply terminal structure is incorporated in the mobile terminal device main body (hereinafter simply referred to as the device main body if necessary) in a relatively simple work process in the assembly work of the production line. In addition, it is possible to supply power directly from the circuit board side while sufficiently holding the motor body.

  The power supply terminal 104 shown in FIG. 10 is arranged on one surface of a terminal block 105 which is a mounting portion of the terminal piece at one end of the housing case 103 of the vibration motor 101 having the weight 106, and the brush piece inside the motor is connected to the connecting portion 104e. Are connected to each other and soldered, and a portion following the contact piece 104d from the terminal piece fixing portion 104a is constituted by two plate spring-like plus and minus metal terminal pieces bent at the bent portion 104b.

  The contact portion 104d of the power supply terminal 104 is pushed against a power supply land (hereinafter simply referred to as a power supply land) of an electrode or a circuit board provided on the device body side by spring elasticity at the bent portion 104b or a movable portion 104c in the vicinity thereof. There is a method of hitting (for example, see Patent Document 1).

  As shown in FIG. 11, between the power supply terminal 104 and the housing case 103, elastic pressing bodies 30 and 30g that cover a part of the outer periphery of the housing case 103 are interposed, so that the housing 100B side on the apparatus body side The plate spring elasticity of the plate spring-shaped power supply terminal 104 and the elastic pressing body of the elastic pressing body 30g is combined with the casing 100A side so as to close the lid together with the circuit board 50. In this method, the contact portion 104d of the power supply terminal 104 is pressed against the power supply land 55 of the circuit board 50 by the sum of the interaction between the stress and the rubber elastic stress (for example, see Patent Document 2 or Patent Document 3).

JP-A-11-136901 (page 4-5, FIGS. 5 and 6) JP-A-2000-78790 (page 4-5, FIGS. 1 and 5) Republished patent WO99 / 23801 (pages 13-16, FIGS. 3 and 4)

  However, in the case of Patent Document 1, for example, like the shape of the power supply terminal 104 shown in FIG. 10, the plate spring-shaped power supply terminal 104 is elastically deformed mainly at the bent portion 104b. In the state of being attached to, there is a distance between the bent portion 104b and the contact portion 104d, which causes a problem that the terminal piece itself swings when the vibration function is used.

  In addition, due to a drop impact or the like, there is a problem that the elastic force as a spring is reduced in a short period of time, and the reliability of connection of the power feeding mechanism is significantly reduced. Particularly in a vibration motor, the above-mentioned problem often occurs under an unfavorable condition always accompanied by vibration.

  On the other hand, in Patent Documents 2 and 3, the problem of lowering the spring elastic force of the power supply terminal 104 due to the above reason is suppressed and supplemented by the elastic pressing body 30g described in Patent Document 2. However, basically, as the power supply terminal 104 alone, a thin plate spring having a large distance, that is, a distance from the bent part 104b to the contact part 104d, in which the elastic force is easily reduced, as described above, is used. In fact, it is not a radical solution.

  The idea of a series of power supply terminal structures common to these is that both the power supply land having the circuit board plane as a contact reference plane and the contact portion of the power supply terminal in contact with the power supply land are arranged on the circuit board surface with the elastic pressing body interposed therebetween. While the amount of decrease in the elastic force of the leaf spring is compensated by the elastic pressing body such as rubber by the built-in pressing force of the device-side casing, the pressing force of the electrical contact of the terminal piece itself is simultaneously Maintained reliability and solved the problem. However, there were some new problems with this.

  That is, in this conventional mounting structure, the leaf spring terminal, the elastic pressing body, and the motor main body are arranged so as to be stacked in the thickness direction, so that the total thickness of the apparatus main body is always equal to the thickness of the elastic pressing body sandwiched between them. The problem was that the dimensions would be thicker.

  In particular, the most popular mobile phone as a recent mobile terminal device is a clamshell-type, two-fold type, and there is a constant demand for thinning the device main body in its usage.

  In the present invention, for each of the above problems, high reliability in a connection structure between a power supply terminal on the vibration generating device side and a power supply land on a circuit board on the side of the mobile terminal device to be mounted, and long-term stable power supply (long life) An object of the present invention is to make the vibration generator thinner. Furthermore, the mounting structure for mounting the vibration generating device on the portable terminal device that does not cause excessive stress load on the circuit board and the holding structure for reliably transmitting the vibration to the casing on the portable terminal device side must be made possible. With the goal.

In order to achieve the above object, in the invention according to claim 1 of the present invention,
A vibration generating mechanism; a housing case that houses at least a part of the vibration generating mechanism; and a projection that protrudes from a terminal block of the housing case, and is electrically connected to a power feeding land of a circuit board mounted on a portable terminal device. In a mounting structure on a mobile terminal device of a vibration generating device comprising a pair of power supply terminals for supplying power to
The power supply terminal is
It consists of a terminal strip of a conductive band plate-like member having spring elasticity,
One of the terminal pieces is fixed to the terminal block, a part of the terminal piece located in a direction perpendicular to the surface of the power supply land of the circuit board is provided with a raised portion protruding outward from the end surface of the terminal block,
The other consists of a bent shape as a contact portion that contacts the surface of the power supply land of the circuit board,
When incorporated in the casing frame of the portable terminal device, the raised portion is pushed by the casing frame wall, and the raised portion is crushed and elastically deformed, so that the contact portion extends in the vertical direction, and the circuit Structure pushed to the substrate side,
The vibration generating device is mounted on a portable terminal device.

In the invention according to claim 2,
The vibration generation mechanism is a vibration motor having an eccentric weight, and the vibration generation device having the power supply terminal structure according to claim 1 is mounted on a portable terminal device.

In the invention according to claim 3,
The vibration generating mechanism is a vibration actuator having a reciprocating vibrator, and the vibration generating device having the power supply terminal structure according to claim 1 is mounted on a portable terminal device.

According to the present invention,
A vibration generating mechanism; a housing case that houses at least a part of the vibration generating mechanism; and a projection that protrudes from a terminal block of the housing case, and is electrically connected to a power feeding land of a circuit board mounted on a portable terminal device. In a structure for mounting a vibration generator such as a vibration motor or a vibration actuator on a portable terminal device, including a pair of power supply terminals that supply power to
The power supply terminal is
It consists of a terminal strip of a conductive band plate-like member having spring elasticity,
One of the terminal pieces is fixed to the terminal block, a part of the terminal piece located in a direction perpendicular to the surface of the power supply land of the circuit board is provided with a raised portion protruding outward from the end surface of the terminal block,
The other consists of a bent shape as a contact portion that contacts the surface of the power supply land of the circuit board,
When the raised portion is pushed by the housing frame wall when incorporated into the housing frame of the mobile terminal device, the raised portion is crushed and elastically deformed,
Since the contact portion extends in the vertical direction and is pushed to the circuit board side,
The power supply terminal enables high reliability and stable power supply without using a conventional elastic pressing body, and enables a reduction in thickness and space saving in the mounting structure of the vibration generator on the portable terminal device.

  In addition, in the structure for mounting the vibration generator on a mobile terminal device, it is possible to reliably vibrate the housing on the mobile device side with only the holder part that holds the housing case body without causing excessive stress on the circuit board side. It is possible to achieve a holding structure that conveys both.

<First Embodiment>
The configuration of the first embodiment according to the present invention will be described below with reference to FIGS. In the first embodiment, a cylindrical vibration motor having an eccentric weight on a rotating shaft will be described as an example of a vibration generating apparatus.

  As shown in FIGS. 1 and 2, the vibration motor 1 as a vibration generator has an eccentric weight 6 fixed to one end of a rotating shaft 7, and a rotor drive mechanism that drives the rotating shaft 7 is held by a holder 2. This is a structure that is supported by a bearing inside a cylindrical housing case (the shape of the housing case that is covered with the holder 2 is not shown). By this rotor unit driving mechanism, the eccentric weight 6 is swung to generate a vibration force.

  The drive mechanism as the motor body is roughly divided into a housing case on the stator side, a bearing, a magnet, a rotor-side rotating shaft, a winding coil, a rectifying mechanism necessary for rotational driving, and a motor body. This is a component configuration in which a power supply terminal for supplying power from the outside is arranged.

  As shown in FIGS. 1 and 2, the power supply terminal 4 is provided on one end side of the housing case, and is attached to a terminal block 5 formed of a resin material or other insulating material. The shape of the single terminal piece of the power supply terminal 4 is obtained by, for example, partially bending the terminal piece of the band plate member as shown in the perspective view and the side view shown in FIGS. 3 (a), (b), and (c). It is formed by bending one end to approximately 90 degrees, and is naturally made of a conductive metal material having spring elasticity.

  Also, the terminal piece of the power supply terminal 4 protrudes outward of the terminal block 5 on one end side of the housing case in a part of the length direction of the strip plate-like member positioned perpendicular to the power supply land surface of the circuit board described later. The contact portion 4d on the front end side that contacts the power supply land surface of the circuit board, which is provided with a raised portion 4c, and continues to one end of the raised portion 4c, is bent with respect to the power supply land surface. .

  The terminal piece of the power supply terminal 4 is fitted into a groove 5c provided in the terminal block 5 as shown in FIG. 1 (b), and further from the end faces 5a and 5b of the terminal block 5 as shown in FIG. The protruding portion 4c is arranged so as to protrude. In addition, the terminal piece of the power supply terminal 4 is operated on the contact portion 4d side on the tip side that contacts the power supply land surface of the circuit board, the other end side is electrically connected to the motor drive mechanism, and is fixed to the terminal block 5. Yes.

  That is, as shown in FIGS. 4, 5, and 7, when the power supply terminal 4 is incorporated in the housing frame 100C of the portable terminal device, the raised portion 4c of the terminal piece of the power supply terminal 4 becomes the housing frame 100C. Is pressed by an external force P from the outer wall and a stronger external force Q (Q ′), and the raised portion 4c is crushed and elastically deformed in the length direction (from the broken line shape to the solid line shape shown in FIG. 5). The tip end side of the terminal 4 extends in the vertical R direction, and the contact portion 4d is pushed out to the circuit board 50 side.

  At this time, as shown in FIG. 6, the terminal piece shape of the power supply terminal 4 is elastically deformed substantially flatly by extending the protruding raised portion 4c with respect to the shape before elastic deformation shown in FIG. It becomes a shape. Accordingly, the total length of the power supply terminal 4 is longer than that of the shape before elastic deformation shown in FIG.

  With this extendable terminal structure, when mounted in the frame of the mobile terminal device, the tip side of the terminal piece of the power supply terminal 4 extends in the vertical R direction toward the circuit board 50, so that the circuit board 50 of the holder 2 The contact 4d of the power supply terminal 4 protruding from the one surface S has a certain elastic force (terminal pressurizing force) at a short distance between the bent portion 4b and the contact 4d with respect to the power supply land 55 of the circuit board 50. Electrical connection can be ensured, and power can be stably supplied to the drive mechanism in the housing case portion of the motor.

  Further, since no elastic pressing body is interposed between the terminal piece of the power supply terminal 4 and the circuit board, the vibration generator mounting structure that does not cause excessive stress load on the circuit board and the housing case main body are held. On the holder side, a holding structure that reliably transmits vibrations to the casing on the portable device side can be made compatible.

  Moreover, the subject with respect to thickness reduction of a portable terminal device can also be solved simultaneously.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. In this second embodiment, as another form of the vibration generating device, the magnetic circuit portion W, which is a weight portion in which the magnet 16, the yoke 17, and the pole piece 18 are combined, is applied to the electromagnetic force of the coil 20 on the opposing diaphragm 19 side. The vibration actuator 11 having a so-called speaker function that resonates with the above and obtains a vibration force by reciprocating the vibrator while being supported by the suspension 21 will be described as an example. It should be noted that the description of parts in the same place as in the first embodiment will be partially omitted or simplified.

  A part of the terminal block 15 in the vibration actuator 11 protrudes from the circular shape of the housing case 13 held by the holder 12 as shown in FIG. The shape of the terminal piece of the power supply terminal 14 attached to the terminal block 15 is substantially the same as that shown in the first embodiment. A portion where the shape of the terminal piece of the power supply terminal 14 is different is obtained by adding a connecting portion 14e as shown in FIG. 8 (c) to the fixed portion 4a side in FIG. It is a point.

  As shown in FIGS. 8 and 9, the power supply terminal 14 is formed on an end surface 15 a of the terminal block 15 on a part of the length direction of the strip plate-like member positioned in a direction perpendicular to the power supply land surface 55 of the circuit board 50. A protruding portion 14c that protrudes outward from 15b is provided, and a contact portion 14d on the front end side that contacts the power feeding land surface 55 of the circuit board 50, which is connected to one end thereof, is bent with respect to the power feeding land surface 55. It has a shape.

  The power supply terminal 14 is fitted into a groove provided in the terminal block 15, and is arranged so that the protruding portion 14c protrudes from the end surfaces 15a and 15b of the terminal block 15. In addition, the power supply terminal 14 operates on the contact portion 14d side on the front end side contacting the power supply land surface 55 of the circuit board 50, and the other end side is fixed to the terminal block 15.

  That is, as shown in FIG. 9, when the power supply terminal 14 is incorporated into the housing frame 100C of the portable terminal device, the raised portion 14c of the terminal piece of the power supply terminal 14 is caused by an external force from the outer wall of the housing frame 100C. When the raised portion 14c is pushed and is crushed and elastically deformed in the length direction of the terminal piece of the power supply terminal 14, the tip end side of the contact portion 14d extends in the length direction, and the contact portion 14d is extended to the circuit board 50 side. It becomes a terminal structure pushed out to.

  At this time, the shape of the terminal piece of the power supply terminal 14 is a shape in which the protruding raised portion 4c is stretched and elastically deformed almost flatly.Accordingly, the total length of the power supply terminal 14 is larger than that before the elastic deformation. Extends in the length direction.

  When mounted in the frame of the portable terminal device by the extendable power supply terminal 14, the front end side of the terminal piece of the power supply terminal 4 extends in the vertical direction toward the circuit board 50, so that the circuit board 50 of the holder 12 The contact portion 14d of the power supply terminal 14 protruding from the one surface S has a certain elastic force (terminal pressurizing force) at a short distance between the bent portion 14b and the contact portion 14d with respect to the power supply land 55 of the circuit board 50. Electrical connection can be ensured, and power can be stably supplied to the drive mechanism in the housing case portion of the motor.

  It can be applied mainly to power supply mechanisms for electronic parts mounted on mobile terminal devices (including electronic devices such as mobile phones, PHS, small wireless communication devices, and other portable information communication terminals). The present invention can be applied to an electrical connection portion between the board-side power supply unit and the vibration generating motor body.

FIG. 2 is an external perspective view (a) and a partially enlarged view (b) of the vibration motor according to the first embodiment of the present invention. The front external view (a) of the vibration motor which concerns on the 1st Embodiment of this invention, and the elements on larger scale (b). The external appearance perspective view (a) of the terminal piece used for the electric power feeding terminal structure of this invention, (c), and a front external view (b). The external appearance perspective view of the vibration motor explaining the movement of the terminal piece in the electric power feeding terminal structure which concerns on the 1st Embodiment of this invention (a), and the elements on larger scale (b). The front external view (a) of the vibration motor explaining the movement of the terminal piece in the electric power feeding terminal structure which concerns on the 1st Embodiment of this invention, and the elements on larger scale (b). FIG. 2 is an external perspective view (a), (c) and a front external view (b) for explaining a shape of a terminal piece after deformation in a power supply terminal structure of the present invention. Schematic which shows the relative positional relationship of the vibration motor which concerns on the 1st Embodiment of this invention, a circuit board, and an apparatus housing | casing. The front external view (a) of the vibration actuator which concerns on the 2nd Embodiment of this invention, top view (b), and sectional drawing (c) which shows an internal structure. Schematic which shows the relative positional relationship of the vibration actuator which concerns on the 2nd Embodiment of this invention, a circuit board, and an apparatus housing | casing. The top view (a) which shows the leaf | plate spring terminal structure in the conventional vibration motor, a front view (b), and a right view (c). Schematic which shows the relative positional relationship of a vibration motor, a circuit board, and an apparatus housing | casing at the time of attaching the vibration motor of the conventional leaf | plate spring terminal structure inside an apparatus. The front view (a) of the vibration actuator which has the terminal structure which has the conventional lead wire attaching part, a top view (b), and sectional drawing (c) which shows an internal structure.

Explanation of symbols

1, 101 Vibration motor
2,12 holder
3, 13, 103 Housing case
4, 14, 104 Feed terminal (terminal piece)
4a, 104a fixed part
4b, 104b Bend
4c, 14c ridge
4d, 14d, 104d contacts
14e, 104e connection
104c Moving parts
5, 15, 105 terminal block
5a, 5b, 15a, 15b End face
5c Groove
6, 106 Eccentric weight
7 Rotating axis
11, 201 Vibration actuator
16, 206 Magnet
17, 207 York
18, 208 pole piece
19, 209 Diaphragm
20, 210 coils
21, 211 suspension
30, 30g elastic pressing body
50 circuit board
55 Power feeding land
100A, 100B housing
100C housing frame
100d sound vent
W Magnetic circuit

Claims (3)

A vibration generating mechanism; a housing case that houses at least a part of the vibration generating mechanism; and a projection that protrudes from a terminal block of the housing case, and is electrically connected to a power feeding land of a circuit board mounted on a portable terminal device. In a mounting structure on a mobile terminal device of a vibration generating device comprising a pair of power supply terminals for supplying power to
The power supply terminal is
It consists of a terminal strip of a conductive band plate-like member having spring elasticity,
One of the terminal pieces is fixed to the terminal block, a part of the terminal piece located in a direction perpendicular to the surface of the power supply land of the circuit board is provided with a raised portion protruding outward from the end surface of the terminal block,
The other consists of a bent shape as a contact portion that contacts the surface of the power supply land of the circuit board,
When incorporated in the casing frame of the portable terminal device, the raised portion is pushed by the casing frame wall, and the raised portion is crushed and elastically deformed, so that the contact portion extends in the vertical direction, and the circuit Structure pushed to the substrate side,
A structure for mounting a vibration generating device on a portable terminal device.   The structure for mounting a vibration generating device according to claim 1, wherein the vibration generating mechanism is a vibration motor having an eccentric weight.   The structure for mounting a vibration generating device on a portable terminal device according to claim 1, wherein the vibration generating mechanism is a vibration actuator having a reciprocating vibrator.

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