JP3318178B2 - Mounting structure of flat type vibration motor in portable wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a flat type vibration motor in a wireless communication device such as a portable radio calling device (product name: pager), a portable telephone, etc., so that an effective silent sound notification means can be obtained. Regarding what was done.

[0002]

2. Description of the Related Art Vibration motors utilizing centrifugal force are frequently used as a vibration source for silent notification of a portable radio communication device from the viewpoint of efficiency. Such a vibration motor has a fan-shaped eccentric weight made of a fan-shaped tungsten alloy having an expanded cross section arranged on the output shaft of a cylindrical DC motor having a diameter of about 6 mm, or has been proposed by the present applicant. As shown in FIG. 1 of Japanese Patent Application No. 4-295503, there is a so-called flat vibration motor using an eccentric rotor in which three air-core armature coils are biased to one side and integrated with a resin in a half-moon shape as a whole. . Since the flat coreless vibration motor can generate centrifugal force by the rotor itself, it does not require an eccentric weight and can be made extremely thin, so that it is easy to use for a micro portable communication device such as a pager.

[0003]

By the way, since the vibration motor uses centrifugal force in the cylindrical and flat co-radial directions, depending on the place where it is mounted, the vibration acceleration in the axial direction is higher than in other directions. Although it is about two-thirds, there is no significant difference because the entire apparatus vibrates. A cylindrical vibration motor is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-125294,
747 and the portable wireless communication device are often laid down. Flat type vibration motors are often mounted in a planar manner, that is, in such a way that the axial direction and the thickness direction of the device coincide with each other because of their shape characteristics, and therefore the vibration is weaker in the thickness direction than in other directions. Compared to the cylindrical type, the radial direction is large and the amount of movement of the center of gravity from the center is large, and it can be covered with a large centrifugal force. However, a flat type vibration motor having a diameter of about 20 mm to 14 mm can sufficiently cope with a sufficient centrifugal force, but when a diameter of 12 mm or less is required, the motor can be mounted on a device. The structure needs to be modified.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable radio communication device in which an ultra-small flat type vibration motor must be mounted, to sufficiently obtain vibration in the thickness direction of the device.
It is another object of the present invention to provide a mounting structure for preventing a direction in which vibration acceleration is inferior.

[0005]

According to a first aspect of the present invention, there is provided a silent notification means having a maximum amplitude in a radial direction as a silent notification means, and an output shaft protruding from a housing.
In the structure for mounting the flat vibration motor in the portable wireless communication device (P1) incorporating the flat vibration motor (1), the flat vibration motor (1) is
In the thickness direction of the device to generate good vibration
This can be achieved by mounting the device inside the device so as to be inclined with respect to the device . Further, as shown in claim 2, wherein up
In order not to sacrifice the occupied space as a means attached,
At least a part of the flat vibration motor constitutes the device
This can be achieved by embedding in a member .

According to the first aspect of the present invention , the amplitude in the thickness direction , the lengthwise direction, and the widthwise direction of the device is obtained.
, The motor itself can be made smaller,
Such a device produces good vibration in all directions as described above.
Obtainable. By adopting the means for achieving the object as described in claim 2, at least a part of the flat type vibration motor is provided.
Was embedded in the members constituting the device,
It is not necessary to pay special attention to the space occupied by the motor.
Wear.

Next, a sectional view of a main part shown in FIG. 1 will be described.
1 is a one having a maximum amplitude in the radial direction and so as to generate vibration by built-in eccentric rotors, so-called
A flat type vibration motor in which the output shaft does not protrude from the housing is attached to the rectangular hole 2a provided on the printed wiring board by soldering with an angle 1a from the radial direction. In the figure, 1b is a flexible plate for power supply, 2b is another electronic component 2b, and 3 and 4 are cabinets each comprising a base and a lid of the portable radio communication device P1. When mounted as described above, since the portable radio communication device P1 is obtained maximum amplitude in the thickness direction, a part of the flat type vibration motor part within the thickness are contained in a printed wiring board, a flat type vibration motor The thickness of the printed wiring board for mounting can be ignored.

FIG. 2 is a sectional view of a main part in which the flat vibration motor 1 having no output shaft and having the maximum amplitude in the radial direction is attached to the ends of the cabinets 33 and 44 of the portable radio communication device P2. A thin portion 3a is arranged at a part of an end of one of the cabinets 33 constituting the exterior of the portable wireless communication device P2, and the flat vibration motor 1 is inserted into the thin portion 3a. . In this case, an insertion portion may be similarly arranged in the other cabinet 44 and sandwiched by a sandwich method. In this case, since the vibration source is provided at the end of the portable wireless communication device, there is no possibility that the vibration is greatly attenuated, and the vibration is easily detected. Moreover, since the cabinet 33 is partially thinned, the strength is not reduced as a whole and the arrangement space is small, so that it is not necessary to enlarge the device itself.

FIG. 3 is a sectional view showing a main part of a specific embodiment of the present invention. The arrangement of a flat vibration motor having a maximum amplitude in the radial direction is devised. The amplitude is generated in all directions. That is, the cabinet 333 of the portable wireless communication device P3 is configured to have a curved surface, the thin portion 3a is formed, and the flat vibration motor 1 is attached here so as to be oblique to the thickness direction. In this way, since the longitudinal direction component and the transverse direction component can be obtained in addition to the thickness direction component, the amplitude generation direction can be sensed in all directions and can be made oblique.
Therefore, the thickness of the device itself can be reduced.

[0010]

According to the present invention, since the amplitude is generated in the longitudinal direction and the lateral direction due to the above-mentioned structure, the amplitude in the thickness direction, which is a conventional neck, becomes large, and the human body is sensed as a portable communication device. Therefore, it is not necessary to increase the amount of vibration, and a flat type vibration motor whose size is reduced in the radial direction can be obtained. Good vibration can be obtained in all directions. Can be thin. In addition, since at least a part of the flat vibration motor is embedded in a member constituting the device, it is not necessary to particularly consider a space occupied by the motor.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a mounting structure of a flat type vibration motor in a portable wireless communication device.

FIG. 2 is a sectional view of a main part of the same other structure.

FIG. 3 is a cutaway oblique view of a main part of a specific embodiment of the present invention.
It is a visual diagram.

[Description of Signs] 1 Flat vibration motor 1a Angle 2 Printed wiring board 2a Rectangular hole 3, 33, 333 Cabinet 4, 44, Cabinet

Claims (2)

(57) [Claims] 1. A device having a maximum amplitude in a radial direction as a silent notification means so that an output shaft does not protrude from a housing.
In the portable wireless communication device (P1) having the built-in flat vibration motor (1), the flat vibration motor (1) is mounted in a favorable structure in all directions.
Obliquely against the thickness direction of the device to generate vibrations
The mounting structure of the flat type vibration motor in the portable wireless communication device mounted inside the device so that 2. An occupied space is sacrificed as said attached means.
So that it does not suffer from
2. The mounting structure of a flat type vibration motor in a portable wireless communication device according to claim 1, wherein a part thereof is embedded in a member constituting the device.