JP3737764B2 - Motor and mobile phone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention particularly relates to a small motor that is built in a mobile communication device (for example, a mobile phone) and used as a vibration generating source of a calling function, and a mobile phone that uses the motor.
[0002]
[Prior art]
Conventionally, as a technology in such a field, there are Japanese Utility Model Publication No. 62-23248 and Japanese Patent Application Laid-Open No. 11-136901. According to the former publication, a motor terminal that supplies current to the motor brush has flexibility, and a technique that positively utilizes this elastic repulsion force has been proposed. Further, as shown in FIG. 6, the small motor 100 described in the latter publication is easy to be incorporated into a communication device such as a mobile phone, and a weight 104 is fixed to the output shaft 103. A current-carrying terminal 102 extending forward is fixed to the body portion 100 a via a bracket 105. When such an energizing terminal 102 made of a spring plate is used, when the motor 100 is fixed to the circuit board 101, there is no need for soldering, and the production efficiency is improved.
[0003]
[Problems to be solved by the invention]
However, the conventional motor described above has the following problems. That is, as shown in FIG. 6, when the motor 100 is placed on the circuit board 101 in assembling the equipment, the energizing terminal 102 extends obliquely forward, so that the front end of the terminal 102 is grounded to the circuit board 101. Thus, even if the weight balance of the motor 100 is considered, the motor 100 is placed on the circuit board 101 in an unstable state. When the assembling work of the mobile phone or the like is performed, it is necessary to press the motor 100 from above with a lid of the mobile phone or the like. When the assembling work is performed in the state of FIG. As a result, the motor 100 may shift to the left in the drawing, and the terminal 102 may be detached from the predetermined electrical contact 101a on the circuit board 101, resulting in inferior assembly workability.
[0004]
The present invention has been made in order to solve the above-described problems. In particular, it is an object of the present invention to provide a motor that can be stably placed on a circuit board when the motor is incorporated into a device. Another object of the present invention is to provide a mobile phone incorporating a motor having the above-described object.
[0005]
[Means for Solving the Problems]
The motor according to the present invention has an output shaft protruding from the front end of the motor main body, and in the motor mounted on the circuit board , one end side of the motor main body is connected to a terminal at the rear end of the motor main body. A terminal for supplying a predetermined voltage to the motor main body, and a grounding portion provided on the other end side of the terminal is arranged close to the rear end on the body side of the motor main body, and also with respect to the output shaft. There is an elastic force in a direction substantially orthogonal to each other, and at one end side of the terminal, there is provided an attachment portion that is fixed to the terminal provided at the rear end of the motor body via solder. Between the first portion that is bent at a substantially right angle at the end portion of the attachment portion and extends along the body portion toward the front end, and extends from the front end to the rear end of the first portion. Patent that the second part is provided with To.
[0006]
In this motor, the grounding part of the terminal is arranged on the body part side of the motor body, and at the same time, arranged on the rear end side of the motor body so as to face the output shaft. The present invention is a creation intended to place the motor on the circuit board so that the grounding portion of the terminal is in conductive contact with a predetermined location on the circuit board when the motor is assembled. In other words, when the motor is placed on the circuit board, the motor needs to be stable on the circuit board because of the elastic force applied to the terminal. The grounding part of the terminal was arranged in the vicinity of the rear end of the motor body so that the motor was balanced on the circuit board, and the motor was placed well. Also, in order to maintain the rotational balance of the output shaft itself that rotates at a high speed in front of the motor, it is very meaningful to bring the terminal grounding portion on the rear end side of the motor body. The terminal further includes a first portion extending substantially parallel to the output shaft along the peripheral surface of the motor main body from the motor main body toward the front end, and from the front end to the rear end of the first portion. A second portion extending. As a result, the second portion can be extended toward the grounding portion of the terminal located on the rear end side of the motor body, and a terminal configuration having the above-described effects can be realized. Furthermore, by forming the attachment portion at a substantially right angle with respect to the first portion, the attachment portion can be easily soldered to the terminal provided on the motor body, improving the assembly workability of the motor, and soldering. After attachment, the first portion extends along the trunk. With such a configuration, the terminal can be formed at a low cost with a simple structure, and as a result, the manufacturing cost can be reduced.
[0007]
In the motor described above, it is preferable that the weight is eccentrically fixed to the output shaft. When such a configuration is adopted, the motor can be appropriately configured as a vibration motor, and the motor can be easily incorporated into a communication device such as a mobile phone.
[0008]
The mobile phone according to the present invention is a mobile phone provided with a motor having an output shaft protruding from the front end of the motor main body. The motor main body has one end connected to a terminal at the rear end of the motor main body , It has a terminal that supplies voltage to the motor body, and the grounding part provided on the other end of this terminal is placed close to the rear end on the body side of the motor body, and substantially orthogonal to the output shaft A mounting portion is provided on one end side of the terminal and fixed to the terminal provided at the rear end of the motor body via solder, and between the mounting portion and the grounding portion. Is bent at a substantially right angle at the end of the mounting portion, and extends to the front end along the body portion, and the second portion extends from the front end to the rear end of the first portion. The portion is provided .
[0009]
In the above-described mobile phone, it is preferable that the weight is eccentrically fixed to the output shaft. When such a configuration is adopted, it can be appropriately configured as a vibration motor, and the mobile phone can be appropriately vibrated.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
[0011]
As shown in FIGS. 1 to 4, the motor 1 is composed of a cored motor and includes a motor main body A having a cylindrical metal motor case (body portion) 2 having a diameter of about 4 mm and a length of about 10 mm. It is planned. A stator made of a permanent magnet having N and S poles is fixed to the inner wall surface of the motor case 2, and a rotor having a coil wound around an iron core is accommodated in the motor case 2. An output shaft 3 supported by a bearing is fixed at the center of the rotor, and a front end portion of the output shaft 3 extends so as to penetrate a front end portion of the motor case 2.
[0012]
Further, in the motor case 2, a commutator is fixed to the rear end of the output shaft 3, and a pair of brushes are in sliding contact with the commutator. A plate-like terminal 4 is fixed to each brush, and the rear end of each terminal 4 protrudes from a bracket 5 fixed to the rear end of the motor case 2. A weight 6 having a substantially semi-cylindrical shape is caulked or press-fitted into the tip portion of the output shaft 3, and the weight 6 is eccentrically fixed to the output shaft 3. Therefore, the motor case 2 itself can be vibrated by swinging the weight 6 with the rotational force of the output shaft 3. Such a motor 1 with a weight is used when an incoming call is called to the user by vibrating the casing with a portable small-sized radio caller or a mobile phone.
[0013]
Here, the motor body A is provided with a terminal 8 for enabling electrical connection between the terminal 4 and a predetermined electrical contact of the circuit board 7 provided in the mobile phone with one touch. Each terminal 8 is provided corresponding to each terminal 4 and applies a predetermined voltage from the outside to the brush. The base end of each terminal 8 is fixed to the motor body A via solder S to each terminal 4. The terminal 8 is formed of a thin spring plate, and the terminal 8 itself has a spring property.
[0014]
Therefore, as shown in FIG. 1, the motor 1 is arranged on the circuit board 7, and in this state, an assembling operation of pressing the motor 1 in the arrow Z direction from above with a cover of a device (not shown) or the like becomes possible. . In this case, as indicated by a two-dot chain line, the terminal 8 is elastically deformed, and the terminal 8 and the electrical contact of the circuit board 7 are reliably connected in a state having a predetermined urging force.
[0015]
The terminal 8 for supplying a predetermined voltage to the motor body A from the outside is formed by bending a thin spring plate. As shown in FIGS. 1 and 5, the one end side of the terminal 8 has an attachment portion 10 that is fixed to the terminal 4 of the motor main body A via solder S. The attachment portion 10 and a grounding portion 14 to be described later are provided. between, the mounting portion 10 extends radially so as to be along the end face of the bracket 5. Further, the terminal 8 has a first portion 11 bent at a right angle toward the front end (side toward the weight 6) at the lower end of the mounting portion 10, and the first portion 11 is formed on the motor body A. Extending substantially parallel to the output shaft 3 along the peripheral surface of the motor case (body portion) 2 toward the front end. In this way, the attachment portion 10 is formed at a substantially right angle with respect to the first portion 11, whereby the attachment portion 10 is easily soldered to the terminal 4 provided on the motor body A and protruding from the bracket 5. be able to. Therefore, the assembly workability of the motor 1 is improved, and the first portion 11 extends appropriately along the trunk portion 2 after soldering.
[0016]
Further, the terminal 8 extends substantially parallel to the first portion 11 toward the rear end of the motor body A through a bent portion B where the front end of the first portion 11 is folded back in a U shape. It has a portion 12. The second portion 12 extends to almost half of the first portion 11. The terminal 8 has a third portion 13 that is bent so as to protrude outward from the rear end of the second portion 12. Further, a grounding portion 14 having a surface plated with Au is bulged and formed on the top of the curved portion 13 a formed at the rear end of the third portion 13. Ensure electrical connection with predetermined electrical contacts.
[0017]
The terminal 8 formed by such folding is accommodated in a slit 17a (see FIG. 2) of the leg 17 projecting from the motor case 2 in the radial direction at the rear end of the motor case 2, and from the slit 17a to the third end. The portion 13 is exposed. As a result, it is easy to visually check the part necessary for electrical joining without exposing the entire terminal 8 that is easily damaged during handling, and the workability of assembling into equipment can be improved.
[0018]
Thus, the grounding portion 14 provided on the other end side of the terminal 8 is provided close to the rear end on the motor case 2 (body portion) side of the motor main body A and substantially orthogonal to the output shaft 3. It will have an elastic force in the direction. Further, by adopting such a terminal 8, it is possible to form the terminal with a simple structure at low cost, and as a result, the manufacturing cost can be reduced.
[0019]
When the motor 1 is incorporated into a device such as a mobile phone, when the motor 1 is placed on the circuit board 7, the third portion 13 approaches the first portion 11 due to the weight of the motor 1 and the weight 6. Terminal 8 is deformed. Thus, by arranging the grounding portion 14 of the terminal 8 in the vicinity of the rear end of the motor body A so as to face the output shaft 3, the support balance of the motor 1 on the circuit board 7 can be improved. And the installation of the motor 1 is extremely improved. Further, in order to maintain the rotational balance of the output shaft 3 itself that rotates at high speed in front of the motor 1, it is meaningful to arrange the grounding portion 14 of the terminal 8 on the rear end side of the motor body A.
[0020]
The motor body A is covered with a rubber holder 16 as indicated by a two-dot chain line in FIGS. Thus, when the motor 1 vibrates with the weight 6, unnecessary vibration noise is not generated from the housing of the device. The third portion 13 of the terminal 8 is exposed to the outside through a slit-like groove 16 a formed in the holder 16.
[0021]
【The invention's effect】
The motor according to the present invention has an output shaft protruding from the front end of the motor main body, and in the motor mounted on the circuit board , one end side of the motor main body is connected to a terminal at the rear end of the motor main body and is externally connected. A terminal for supplying a predetermined voltage to the motor main body is provided, and a grounding portion provided on the other end side of the terminal is arranged close to the rear end on the body side of the motor main body, and with respect to the output shaft. There is an elastic force in a substantially orthogonal direction, and one end of the terminal is provided with a mounting portion that is fixed to a terminal provided at the rear end of the motor body via solder . In between, a first portion that is bent at a substantially right angle at the end portion of the attachment portion and extends along the body portion toward the front end, and extends from the front end of the first portion toward the rear end. in particular, and the second portion is provided , When incorporating the motor in the instrument, it can be placed on the motor steady on a circuit board.
[0022]
In the mobile phone according to the present invention, the motor can be stably placed on the circuit board when the motor is incorporated into the mobile phone.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a motor according to the present invention.
FIG. 2 is a bottom view of the motor of FIG.
FIG. 3 is a front view of the motor of FIG. 1;
4 is a rear view of the motor of FIG. 1. FIG.
FIG. 5 is a perspective view showing a terminal applied to the motor of the present invention.
FIG. 6 is a side view showing a conventional motor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Motor case (torso part), 3 ... Output shaft, 4 ... Terminal, 6 ... Weight, 8 ... Terminal, 10 ... Installation part, 11 ... 1st part, 12 ... 2nd part, 13 ... 3rd part, 14 ... Grounding part, A ... Motor body, B ... Bending part, S ... Solder.

Claims (3)

In the motor mounted on the circuit board with the output shaft protruding from the front end of the motor body,
The motor main body has a terminal that is connected to a terminal at the rear end of the motor main body and supplies a predetermined voltage to the motor main body from the outside , and a grounding portion provided at the other end of the terminal is The motor body is disposed close to the rear end on the body side, and has an elastic force in a direction substantially perpendicular to the output shaft,
On the one end side of the terminal, there is provided an attachment portion that is fixed to a terminal provided at the rear end of the motor body via solder, and the attachment portion is provided between the attachment portion and the grounding portion. A first portion that is bent at a substantially right angle at the end of the first portion and extends along the body portion toward the front end, and a second portion that extends from the front end of the first portion toward the rear end. motor, characterized in that the parts are provided.   The motor according to claim 1, wherein a weight is eccentrically fixed to the output shaft.   A mobile phone comprising the motor according to claim 1.

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