JPH06253502A - Pager motor - Google Patents

Abstract

PURPOSE:To provide a motor required for manufacture of a thin and downsized motor. CONSTITUTION:A vibrator 11 for pager comprises a motor 15 rotary weights 12a, 12b. The motor 15 is provided with a tubular permanent magnet 50 on the body case 9 side wherein the motor shaft 80 is born by bearings 56a, 56b and secured to the rotor part, i.e., a commutator 52, and a coil 54. The rotary weights 12a, 12b are disposed eccentrically at the opposite ends of the motor shaft 80 and a driving current is fed to the coil 54 from a brush 10 disposed closely to the rotary weight 12a. Furthermore, a brush holder 14 thicker than the outer diameter of the body case 9 and containing a pair of brushes 10 is secured to an end part of the body case 10 while protruding perpendicularly to the motor shaft 80.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor for a pager, and more particularly to a structure of a thin cylindrical motor used for a vibrator for a pager.

[0002]

2. Description of the Related Art A so-called pager service for wirelessly transmitting a telephone call or a message to a user on the go is widely used. Such a pager
The size and weight of the user are required to be constantly carried by the user. Therefore, the method of calling the user needs to be a simple method. A conventional general portable receiver uses a method of transmitting a call to a user by generating a ringing sound or a ringing vibration. Among them, the pager using the calling vibration has an advantage that only the person himself or herself can be called without giving noise or the like to the surroundings due to minute vibration.

The motor for vibration generation in the existing pager is usually a coreless motor and has a cylindrical shape of φ7 mm. And, in the internal structure of the motor, the stator part is provided with a permanent magnet in the main body case,
The rotor part has a commutator and a coil fixed to the motor shaft. The motor shaft is supported by bearings. Further, a rotary weight is attached to the tip of the motor shaft 80 in an eccentric state. Further, a brush for supplying a drive current to the coil is arranged at one end of the main body case, and the brush is housed by being bent in a case of φ7 mm.

With the above structure, when the motor is started, the heavy eccentric rotary weight is eccentrically rotated at a high speed, so that vibration occurs. This allows the user of the pager to sense the ringing vibration.

[0005]

However, in order to reduce the size of the pager, in particular to make it thinner, it is necessary to reduce the thickness or outer diameter of the motor housed in the pager. That is, it is necessary to make the outer diameter of the existing motor smaller than φ7 mm. Along with this, it is necessary to shorten the length of the brush housed in the main body case or devise a bending process.

However, in general, the brush uses the elasticity of the spring to supply a drive current to the coil by a desired brush pressure. Therefore, in terms of downsizing,
The brush must have some free length. Also,
When performing bending, there is a problem that the process is complicated and the economy is poor.

From the above, with the existing motor shape, there is a limit to downsizing and thinning of the pager.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a pager motor for manufacturing a miniaturized and thinned pajer.

[0009]

In order to achieve the above object, the invention according to claim 1 is provided with a case for accommodating a motor main body, which is provided in a pager, and a permanent magnet fixed inside the case. , A movable coil fixed to the motor shaft and arranged outside the permanent magnet, and a brush for supplying a driving current to the movable coil are housed and fixed to the end of the case by projecting in a direction perpendicular to the motor shaft. And a brush holder having a thickness less than or equal to the outer diameter of the case.

According to a second aspect of the present invention, in the pager motor according to the first aspect, a pair of sector ring-shaped external permanent magnets are provided outside the case, and the pair of external permanent magnets are provided. The external permanent magnet is fixed to the case in the same direction as the protruding direction of the brush holder.

[0011]

According to the structure of the first aspect, the brush for supplying the drive current to the movable coil is housed and fixed to the end portion of the main body case so as to project in the direction perpendicular to the motor shaft and not larger than the outer diameter of the main body case. With the brush holder having a thickness of 1, the brush having a free length that provides a desired brush pressure can be housed in the pager without increasing the thickness of the pager without having a special shape.

According to the second aspect of the invention, a pair of sector ring-shaped external permanent magnets are provided outside the main body case, and the pair of external permanent magnets are arranged in the same direction as the protruding direction of the brush holder. By fixing to the main body case, the magnetic flux for driving the coil can be increased without increasing the thickness of the pager.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view for explaining the structure of a pager vibrator using a pager motor according to the present invention. Further, FIG. 2 shows a cross-sectional view taken along the line AA ′ of FIG. FIG. 3 is a perspective view of a pager vibrator using the pager motor according to the present invention.

First, a first embodiment of a pager motor according to the present invention will be described.

Vibrator for pager 11 according to the present invention
Uses a coreless motor. And the motor 1
In the internal structure of FIG. 5, a cylindrical permanent magnet 50 is provided in the main body case 9 in the stator portion, and the cylindrical permanent magnet 50 is fixed by being connected to the pipe 58 which is connected to the bearing 56b. The motor shaft 80 is supported by bearings 56a and 56b. On the other hand, the rotor part is the motor shaft 80
The commutator 52 and the movable coil 54 are fixed to the. A brush 10 is provided near the rotary weight 12a, and a drive current is supplied from the brush 10 to the movable coil 54. Rotating weights 12a and 12b are attached to both ends of the motor shaft 80 outside the body case 9 in an eccentric state.

Therefore, when the drive current is supplied from the brush 10, the movable coil 54 starts to rotate around the cylindrical permanent magnet 50, which causes the motor shaft 80 to rotate. Then, the rotary weights 12a and 12b are eccentrically rotated, and the vibrator 11 vibrates.

As shown in FIGS. 1 and 3, a feature of the present invention is that the brush 10 for supplying a driving current to the movable coil 54 is housed therein, and the brush is projected at the end of the main body case 9 in the direction perpendicular to the motor shaft 80. By providing the brush holder 14 that is fixed and has a thickness equal to or less than the outer diameter of the main body case 9, a brush having a free length that provides a desired brush pressure can be housed in the pager without having a special shape. it can. Also, according to the present invention, it is possible to use a long brush without increasing the thickness of the pager. Furthermore, the manufacturing process such as bending of the brush can be simplified. Therefore, there is an advantage that the pager can be reduced in size and weight and the manufacturing process can be simplified.

Further, since the brush holder 14 protruding from the motor 15 is provided as described above, the brush holder 14 can be mounted on the substrate inside the pager, and the motor inside the pager can be stably fixed. it can. Furthermore,
Through-hole mounting or surface mounting can be performed on the substrate without using the lead wires of the terminals of the motor 15, and the mounting process can be simplified by using the socket holder for substrate mounting.

Next, a second embodiment of the pager motor according to the present invention will be described.

Usually, in a motor in which a moving coil is arranged outside the permanent magnet, if the outer diameter of the motor is reduced, the number of windings of the moving coil and the magnetic flux of the permanent magnet are limited.
The driving force of the motor is reduced. Therefore, in this structure, comparing the amount of vibration generated,
There is a difference of about 1/3 with the mm motor.

Therefore, as shown in FIG. 1 and FIG.
According to the present invention, a pair of sector ring-shaped external permanent magnets 60a and 60b are provided outside the main body case 9, and the pair of external permanent magnets 60a and 60b are arranged in the same direction as the protruding direction of the brush holder 14. Fixed to. That is, FIG.
As shown in FIG. 2, a pair of sector ring-shaped external permanent magnets 60 a and 6 having a width substantially equal to the outer diameter of the main body case 9.
0b is arranged in the main body case 9 so as to sandwich the main body case 9 from the same direction as the protruding direction of the brush holder 14. Therefore, as shown in FIG. 3, the thickness of the pager motor is not increased.

Further, it is possible to eliminate the shortage of magnetic flux due to the above-mentioned thin cylindrical motor. That is, since a magnetic flux obtained by combining the cylindrical permanent magnet 50 arranged in the main body case 9 and the pair of sector ring-shaped external permanent magnets 60a and 60b is supplied to the movable coil, even if the motor is φ4 mm, A sufficiently large magnetic flux can be obtained. For this reason, even a miniaturized pager can generate sufficient vibration that can be sensed by the user.

[0024]

As described above, according to the present invention,
The brush holder that supplies the drive current to the moving coil is fixed to the end of the main body case by protruding in the direction perpendicular to the motor shaft, and the brush holder has a thickness less than the outer diameter of the main body case. A brush having a free length that provides a desired brush pressure can be housed in the pledger without any special shape without increasing the pressure. Further, there is an advantage that the manufacturing process such as bending of the brush can be simplified.

A pair of sector ring-shaped external permanent magnets are provided on the outside of the main body case, and the pair of external permanent magnets are fixed to the main body case in the same direction as the protruding direction of the brush holder. The thickness does not increase.

Further, even in the case of a thin-cylinder-shaped motor, since the magnetic flux obtained by combining the cylindrical permanent magnet arranged in the main body case and the pair of sector ring-shaped external permanent magnets is supplied to the movable coil, φ4 mm. Even with this motor, a sufficiently large magnetic flux can be obtained. For this reason, even a miniaturized pager can generate sufficient vibration that can be sensed by the user.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating the configuration of a pager vibrator using a pager motor according to the present invention.

2 is a cross-sectional view taken along the line AA ′ of FIG.

FIG. 3 is a perspective view of a pager vibrator using the pager motor according to the present invention.

[Explanation of symbols]

 9 Case 10 Brush 11 Vibrator for Peger 12a, 12b Rotating Weight 14 Brush Holder 15 Motor 50 First Permanent Magnet 52 Commutator 54 Moving Coil 56a, 56b Bearing 58 Pipe 60a, 60b Second Permanent Magnet 62 Yoke 80 Motor Shaft

[Procedure amendment]

[Submission date] April 21, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008] The present invention has been made in view of the above problems, that the aim is to provide a Peja motor for producing Bae di <br/> catcher over which is smaller and thinner Is.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

According to a second aspect of the present invention, in the pager motor according to the first aspect, a pair of sector ring-shaped external permanent magnets are provided outside the case, and the pair of external permanent magnets are provided. The external permanent magnet is fixed to the case in the same direction as the protruding direction of the brush holder. Further, the invention according to claim 3 is the inside of the pejer
And a case for housing the motor body and the case
The permanent magnet fixed inside the
A moving coil disposed outside the permanent magnet,
The brush that supplies the drive current to the movable coil is stored in the front
At the end of the case, stick it out by
And a fixed plastic holder,
Is provided with a pair of sectored external permanent magnets,
This pair of external permanent magnets is the protrusion of the brush holder.
It is fixed to the case in the same direction as the direction
And

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

According to the second and third aspects of the invention, a pair of sector ring-shaped external permanent magnets are provided outside the main body case, and the pair of external permanent magnets are the same as the protruding direction of the brush holder. By fixing to the body case in the direction, the magnetic flux for driving the coil can be increased without increasing the thickness of the pager.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (2)

[Claims] 1. A case provided inside a pager for accommodating a motor body, a permanent magnet fixed inside the case, and a movable coil fixed to a motor shaft and arranged outside the permanent magnet. Housing a brush for supplying a driving current to the movable coil,
A pegger motor comprising: a brush holder that is fixed to an end portion of the case so as to project in a direction substantially perpendicular to the motor shaft and has a thickness that is equal to or less than an outer diameter of the case. 2. The pager motor according to claim 1, further comprising a pair of sector ring-shaped external permanent magnets provided outside the case, wherein the pair of external permanent magnets comprises:
A motor for a pager, which is fixed to the case in the same direction as the protruding direction of the brush holder.