JPH10136608A - Structure and method for mounting of printed-wiring board at cylindrical vibrating motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure and a mounting method, in which a cylindrical vibrating motor forced to use a subminiature neodymium-based magnet is mounted on a printed-wiring board, without performing manual soldering operations and in which assembling efficiency is high during the vibrating motor mount. SOLUTION: A cylindrical vibrating motor 1 is attached to a printed-wiring board 4 via a holder 2, used to hold its housing H and via an electrifying electrode 3, which is brought into contact with at least one electrifying terminal 1c which protrudes to the outside from the housing H at the motor 1. At this time, only the holder 2 is attached in advance to the printed-wiring board 4, together with other electronic components so as to be reflow-soldered, the motor 1 is attached to the holder 2, and the electrifying terminal 1c which protrudes from the motor 1 is brought into contact with the electrifying electrode 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board mounting structure of a tubular vibration motor in a wireless communication device such as a portable radio calling device (product name: pager) and a portable telephone, and the like. It relates to the means that can be obtained.

[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. As a vibration motor, there is a motor in which a fan-shaped eccentric weight made of a fan-shaped tungsten alloy having an enlarged cross section is arranged on an output shaft of a cylindrical DC motor having a diameter of about 6 mm. In order to mount such a cylindrical vibration motor M on a printed wiring board stored in a portable wireless communication device while laying it down, as shown in FIG. A holder H is required.

[0003]

Since such a cylindrical vibration motor M is required to be small and highly efficient, a neodymium magnet must be used. Therefore, due to the demagnetization problem of the neodymium magnet, it is not possible to attach the printed wiring board together with other electronic parts and reflow solder,
Since it has to be manually soldered together with the lead wires later through a metal holder for mounting the printed wiring board, the mounting is troublesome.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the necessity of manually soldering when mounting a printed wiring board of a cylindrical vibration motor, which must use an ultra-small neodymium-based magnet. It is an object of the present invention to provide a mounting structure having a high assembling efficiency and a mounting method thereof.

[0005]

In order to solve the above-mentioned problems, a cylindrical vibration motor and a holder for holding the motor are not integrated first, and only the holder is first mounted together with other electronic components on a printed wiring board and reflow soldering is performed. Thereafter, the motor can be attached to the holder and the power supply terminal protruding from the motor can be brought into contact with the power supply electrode.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a cylindrical vibration motor mounting structure which is mounted on a printed wiring board as in the first aspect of the present invention, and a holder for holding a housing of the motor and the motor. And a power supply electrode that contacts at least one power supply terminal protruding outward from the housing. As a specific embodiment, as described in claim 2, the motor housing is used as one power supply terminal, and at least a part of the holder is used as one power supply electrode for receiving the housing. The power supply electrode to be brought into contact with at least one power supply terminal as described above is formed by sandwiching the power supply terminal, or at least one power supply terminal and the power supply electrode are formed in a male-female type. Alternatively, they may be brought into contact with each other by press fitting. The holder may be formed of a heat-resistant resin as described in claim 5, or the holder may be formed at least partially of metal as described in claim 6. As a method for mounting the cylindrical vibration motor on a printed wiring board, a holder for holding a housing of the motor and at least one power supply protruding outward from the housing of the motor are provided. The power supply electrode in contact with the terminal may be reflow-soldered together with other electronic components, and then the motor may be attached to the holder and the power supply terminal may be brought into contact with the power supply electrode. According to the embodiment of the present invention, the motor can be attached to the printed wiring board after the holder and the power supply electrode are reflowed together with other electronic components first, so that the post-soldering step by hand attachment is performed. Becomes unnecessary. According to the embodiment of the invention as described in claim 2, the motor housing can be grounded as one power supply terminal,
It is effective against electric noise. According to the embodiment of the present invention as described in claim 3, the connection between the power supply terminal and the power supply electrode becomes easy. According to the fourth aspect of the invention, the connection between the power supply terminal and the power supply electrode is ensured. According to the fifth embodiment of the present invention, the holder can be reflowed, and the power supply electrode can be integrally formed. According to the sixth aspect of the invention, the motor housing can be grounded as one power supply terminal, which is effective against electric noise. According to the mounting method of the embodiment of the invention as described in claim 7,
Since the motor can be attached to the printed wiring board after the holder and the power supply electrode are reflowed together with other electronic components first, a post-soldering step by hand is not required.

[0007]

First Embodiment Next, as a first embodiment of the present invention, a printed wiring board mounting structure of a cylindrical vibration motor will be described with reference to an essential part assembly diagram shown in FIG. Reference numeral 1 denotes a cylindrical vibration motor in which an eccentric weight W is arranged on an output shaft S so as to have a maximum amplitude in a radial direction.
b from the resin bracket 1b of the housing H made of
One of the power supply terminals 1c protrudes, and the metal case 1a is used as the other power supply terminal by internal connection.
Reference numeral 2 denotes a holder for mounting the cylindrical vibration motor 1, and a metal holding portion 2a for holding a housing H of the motor, and mounting legs 2b, 2b integrally protruding from the holding portion 2a, and these are integrated. And a base 2c made of a heat-resistant resin, into which a power supply electrode 3 for holding the one power supply terminal 1c is sandwiched and held. The holding portion 2a and the power supply electrode 3 are separated by the through hole 2d and are electrically insulated. The thus configured holder 2 and power supply electrode 3 are reflow-soldered together with other electronic components (not shown) to the printed wiring board 4 via the mounting legs 2b, 2b, and 3a, respectively. Thereafter, the cylindrical vibration motor 1 is fitted into the holding portion 2a of the holder 2 and the power supply terminal 1c
May be sandwiched between the power supply electrodes 3. In the above embodiment, the holder 2 and the power supply electrode 3 are integrated via the base 2c made of heat-resistant resin. However, the base 2c made of heat-resistant resin is deleted, and the printed wiring board 4 is separately provided. Modifications may be made such as a structure of starting up or an integrated one being reflowed and then separated.

[0008]

Second Embodiment FIG. 2 is an assembly view of a main part of a second embodiment of the present invention, in which the structure of a power supply terminal and a power supply electrode is a male and female plug type. That is, the pin 1 is formed by bending a power supply terminal protruding from the resin bracket 1b downward.
1c, and is inserted into a jack-type power supply electrode 33 raised from the printed wiring board 4 side. As a modified example, as shown in FIG. 3, a power supply terminal is formed into a flat type 12c and a through hole 12d having a radial cut is provided, and the power supply terminal is raised from the side of the printed wiring board 4 having a diameter slightly smaller than the through hole 12d. The pin 34 may be press-fitted. By doing so, the connection can be reliably established. The jack-type power supply electrode 33 and the pin 34 may be integrated with the holder 2 or may be directly raised from the printed wiring board 4.

[0009]

Third Embodiment FIG. 4 is an assembly view of a main part of a third embodiment of the present invention, in which a holder is made of a heat-resistant resin. In other words, the cylindrical vibration motor 11 may have two positive and negative power supply terminals 1c, 1c protruding from the resin bracket 1b and connected to the two positive and negative power supply electrodes 35, 36 disposed on the heat resistant resin holder 22. This feeding electrode 3
The serrations 5 and 36 may be provided with serrations to prevent the cylindrical vibration motor 11 from being retained. As a modification of this embodiment, the holder may be made of metal with two positive and negative power supply terminals.

In each of the above embodiments, a motor using a cylindrical vibration motor has been described. However, it is needless to say that the present invention can be applied to a motor having a rectangular cylinder or an oval cross section. In each of the embodiments described above, the output shaft is provided with a fan-shaped eccentric weight made of a fan-shaped tungsten alloy having an enlarged cross section. However, the eccentric weight may be built in.

A method of mounting such a tubular vibration motor on a printed wiring board is as follows, assuming that the assembling structure of each of the above embodiments is summarized. That is, the holder for holding the housing of the motor and the power supply electrode that contacts at least one power supply terminal protruding outward from the housing of the motor are first reflow-soldered together with other electronic components, and then A step of attaching the motor to the holder and bringing the power supply terminal into contact with the power supply electrode may be employed.

[0012]

The present invention is configured as described above.
It is now possible to use the ultra-small neodymium-based magnets, which had been the bottleneck in the past, without having to solder them by hand when mounting the printed wiring board of a cylindrical vibration motor, which reduces the assembly efficiency during mounting. A high mounting structure and mounting method can be provided.

[Brief description of the drawings]

FIG. 1 is an assembly view of a main part of a first embodiment of a printed wiring board mounting structure of a cylindrical vibration motor according to the present invention.

FIG. 2 is an assembly view of a main part of the second embodiment.

FIG. 3 is an assembly view of a main part of a modification of the second embodiment.

FIG. 4 is an assembly view of a main part of the third embodiment.

FIG. 5 is a perspective view of a main part of a conventional cylindrical vibration motor mounted on a printed wiring board.

[Explanation of symbols]

 1, 11 Cylindrical vibration motor 1a Metal case 1b Resin bracket 1c, 11c, 12c Power supply terminal 2 Holder 2a Holder 2b Mounting leg 2c Base H housing 3, 33, 34, 35, 36 Power supply electrode 4 Printed wiring board

Claims (7)

[Claims] 1. A cylindrical vibration motor mounting structure which is mounted on a printed wiring board while being laid on the printed wiring board. A holder for holding a housing of the motor and at least one power supply terminal protruding outward from the housing of the motor. A printed wiring board mounting structure of a cylindrical vibration motor which is attached to a printed wiring board via a power supply electrode to be brought into contact. 2. The printed wiring board mounting structure for a cylindrical vibration motor according to claim 1, wherein the housing of the motor is one power supply terminal, and at least a part of the holder is one power supply electrode for receiving the housing. 3. The printed wiring board mounting structure for a tubular vibration motor according to claim 1, wherein the power supply electrode to be brought into contact with at least one power supply terminal is formed by sandwiching the power supply terminal. 4. The printed wiring board mounting structure for a cylindrical vibration motor according to claim 1, wherein at least one power supply terminal and the power supply electrode are formed in a male and female type and are brought into contact with each other by press-fitting. 5. The printed wiring board mounting structure for a cylindrical vibration motor according to claim 1, wherein the holder is formed of a heat-resistant resin. 6. The printed wiring board mounting structure for a cylindrical vibration motor according to claim 1, wherein the holder is at least partially formed of metal. 7. A method for mounting a cylindrical vibration motor on a printed wiring board, wherein the holder holds a housing of the motor and at least one power supply terminal protruding outward from the housing of the motor. A method for mounting a printed circuit board on a cylindrical vibration motor, comprising: reflow-soldering a contacting power supply electrode together with another electronic component; and then mounting the motor on a holder and bringing a power supply terminal into contact with the power supply electrode.