JPH10304637A - Cylindrical motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the possibility of a short circuit being generated due to dislocation of a cylindrical motor by permitting the electrode surface of a terminal electrode to face at the substantially central position of the rear end surface of a housing. SOLUTION: A housing 2 is formed into a cylindrical shape out of conductive material, such as a metal, and the electrode of a motor 1 is formed with the housing 2 and a terminal electrode 6 formed at a brush base 3. The terminal electrode 6 is fitted so as to permit a circular electrode surface 6a to appear at the substantially central position of the rear end surface of the housing 2, consisting of the brush base 3. The electrode surface 6a of the terminal electrode 6 always comes into contact with a tab-shaped feeder terminal formed on the insulating plate of a bracket. Therefore, the electrode of a motor 1 and the feeder terminal formed on the bracket will not be kept in a non- conductive condition or short-circuit condition due to dislocation. Therefore, processing for preventing dislocation can be eliminated, thus it is possible to markedly improve operating efficiency in assembly processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a portable telephone, a PH
S, a vibration generator that generates a bodily sensation that is built into a portable communication device such as a pager (trademark of NTT Corporation), a vibration transmission type pager, a blind signal receiver, etc. and serves as a silent incoming notification signal. The present invention relates to a small cylindrical motor used as a motor.

[0002]

2. Description of the Related Art Conventionally, a small-sized cylindrical motor generally used is mainly of a lead wire type in which a power supply lead wire is attached to an electrode thereof. When mounting on a board, the lead wire must be manually soldered to a power supply circuit of a printed wiring board.

In view of such circumstances, recently, as shown in FIG. 3, instead of a lead wire, an insulating brush stand 23 attached to the rear end side of a housing 22 forming a body of a motor is provided. Terminal electrode 24R (+ pole) and 24L (-pole)
Is used. As shown in FIG. 4, the housing 22 of the cylindrical motor 21 has a holder 26 for holding the cylindrical motor 21 and terminal electrodes 24R and 24L of the cylindrical motor 21 held on the holder 26. A bracket 25 having tab-shaped power supply terminals 27R and 27L for contacting and connecting the terminal electrodes 24R and 24L to a power supply circuit of a printed wiring board (not shown) is mounted.

[0004]

However, as shown in FIG. 4, during the assembling process of mounting the bracket 25 on the housing 22 of the cylindrical motor 21, the cylindrical motor 21 is displaced in the circumferential direction of the housing 22. Each of the terminal electrodes 24R and 24L provided on the cylindrical motor 21 is in parallel with each of the power supply terminals 27R and 27L provided on the bracket 25 and does not individually contact the power supply terminals 27R and 27L.
L sometimes contacted in a crossed state. If the cylindrical motor 21 is mounted on the printed wiring board in this state, it may be damaged by a short circuit. Therefore, it is necessary to check whether or not the cylindrical motor 21 is misaligned or correct the misalignment. I had to do it.

[0005] A pair of left and right insertion direction keys 30R and 30L are protruded from the brush stand 23, and a holder 26 is provided.
When the brackets 25 are mounted on the cylindrical motor 21, the terminal electrodes 24R and 24L are always parallel to the power supply terminals 27R and 27L if slits or the like for fixing the insertion direction keys 30R and 30L are formed on both left and right sides of the motor. Although they are automatically positioned so as to come into contact with each other, if the insertion direction keys 30R, 30L, slits, and the like are formed in the cylindrical motor 21 and the bracket 25, the processing cost increases accordingly.

SUMMARY OF THE INVENTION Accordingly, it is a technical object of the present invention to reliably eliminate the possibility of a short circuit caused by a displacement of a cylindrical motor with a simple configuration that does not increase the processing cost.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cylindrical motor in which a brush base formed of an insulating material is attached to a rear end of a housing constituting a body of the motor. The housing is formed of a conductive material, and an electrode of the motor includes the housing and a terminal electrode provided on the brush stand, and an electrode surface of the terminal electrode is substantially at a center position of a rear end surface of the housing. It is characterized by being expressed.

In the cylindrical motor according to the present invention, the electrodes are composed of a housing formed of a conductive material and a terminal electrode having an electrode surface exposed at a substantially central position of a rear end surface of the housing. Even when the housing is displaced in the circumferential direction with respect to the bracket when the bracket is mounted on the bracket, the arrangement of the electrodes is always constant. Therefore, since the power supply terminals provided on the bracket can be constantly brought into contact with the respective electrodes at fixed positions, a non-conductive state or a short-circuit state may occur between the electrode of the motor and the power supply terminal of the bracket. There is no.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a cylindrical motor according to the present invention, and FIG. 2 is a sectional view showing an example of a bracket mounted on a housing of the cylindrical motor according to the present invention.

In a cylindrical motor 1 shown in FIG. 1, a brush base 3 formed of an insulating material such as injection molding resin is attached to a rear end side of a housing 2 forming a body portion.
The rotary shaft 4 of the motor 1 is projected from the front end of the motor 1 and an eccentric weight 5 for generating vibration is attached to the tip of the rotary shaft 4. The housing 2 is formed of a conductive material such as metal into a cylindrical shape, and the electrodes of the motor 1 are connected to the housing 2.
(− Pole) and the terminal electrode 6 (+ pole) provided on the brush stand 3. The terminal electrode 6 is attached so that a circular electrode surface 6 a is exposed at a substantially central position of a rear end surface of the housing 2 formed of the brush stand 3.

As shown in FIG. 2, a bracket 7 for mounting the cylindrical motor 1 on a printed wiring board (not shown) while holding the housing 2 by a holder portion 8 is mounted on the housing 2. Have been. Bracket 7
The holder 2 is formed of a conductive material such as a metal plate, and the housing 2 held on the holder 8 by the holder 8.
A tab-shaped power supply terminal 9 for connecting the (-) pole to a power supply circuit of the printed wiring board is provided, and
An insulating plate 10 facing the brush stand 3 attached to the rear end side is provided, and the insulating plate 10 is pressed into contact with the electrode surface 6a of the terminal electrode 6 (+ pole) provided on the brush stand 3 by pressing the same. A tab-shaped power supply terminal 11 for connecting the terminal electrode 6 to a power supply circuit of a printed wiring board is provided.

The holder portion 8 is formed into a generally gutter-like shape having an upwardly concave portion by, for example, stamping and pressing a metal plate. The housing 2 and the insulating plate 10 are formed into a female shape which can be fitted and fixed in a fixed position by one-touch by elastic deformation, and fixed terminals 12a and 12b for fixing the bracket 7 to the printed wiring board are formed at the lower end side. And the power supply terminal 1 provided on the insulating plate 10.
A hole 13 is formed for avoiding contact with 1.

In this embodiment, in order to facilitate the mounting operation of the cylindrical motor 1, a power supply terminal 9 provided on the holder portion 8 is provided.
Also serve as the fixed terminal 12a. Further, the power supply terminal 11 of the present embodiment is configured such that, when the bracket 7 is mounted on the housing 2 of the motor 1, the power supply terminal 11 comes into pressure contact with the electrode surface 6 a of the terminal electrode 6 provided on the brush base 3 forming the rear end surface of the housing 2. The portion to be pressed is curved so as to protrude in an arc shape to provide spring elasticity. Alternatively, for example, the terminal electrode 6 may have a structure having spring elasticity, and The surface 6a and the power supply terminal 11 may be pressed against each other.

The above is the configuration of the present invention, and its operation will now be described. First, the assembling process of mounting the bracket 7 on the housing 2 of the cylindrical motor 1 is completed simply by pressing the housing 2 into the holder portion 8 of the bracket 7. Moreover, the housing 2 pressed into the holder portion 8
No matter how the terminal electrode 6 is moved in the circumferential direction, the terminal electrode 6 is always in contact with the tab-shaped power supply terminal 9 provided on the holder portion 8, and is exposed at substantially the center of the rear end surface of the housing 2. The electrode surface 6a always contacts the tab-shaped power supply terminal 11 provided on the insulating plate 10 of the bracket 7, so that the motor 1
There is no occurrence of a non-conductive state or a short-circuit state due to a positional displacement between the electrode and the power supply terminal provided on the bracket 7.

Therefore, since it is not necessary to perform processing for preventing the displacement of the cylindrical motor 1 and the bracket 7, the number of parts and man-hours are reduced as compared with the conventional product, and the work of correcting the displacement is not required. Therefore, the working efficiency in the assembling process is remarkably improved, and the processing cost is greatly reduced.

[0016]

According to the present invention, during assembly processing for mounting the bracket on the housing of the cylindrical motor, a displacement occurs between the electrode of the motor and the power supply terminal provided on the bracket. The conductive state and the short-circuit state can be reliably prevented, and at the same time, the number of parts and the number of assembling steps of the cylindrical motor and the bracket are reduced, so that a great cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a cylindrical motor according to the present invention.

FIG. 2 is a sectional view showing an example of a bracket mounted on the cylindrical motor of FIG. 1;

FIG. 3 is a perspective view showing an example of a conventional cylindrical motor.

FIG. 4 is a rear view showing a state where a bracket is mounted on a conventional cylindrical motor.

[Explanation of symbols]

 1 ... cylindrical motor 2 ... housing 3 ... brush base 6 ... terminal electrode 6a ... electrode surface of terminal electrode 7 ... bracket 8 ····· Holder part 9 ···· Power supply terminal 10 ····· Insulating plate 11 ···· Power supply terminal 12a ··· Fixed terminal

Claims (4)

[Claims] 1. A cylindrical motor in which a brush base formed of an insulating material is attached to a rear end side of a housing forming a body of the motor, wherein the housing (2) is formed of a conductive material, A terminal electrode (6) provided on the housing (2) and the brush stand (3).
Wherein the electrode surface (6a) of the terminal electrode (6) is exposed substantially at the center of the rear end surface of the housing (2). 2. A bracket (7) is mounted on the housing (2) for holding the housing (2) by a holder (8) and mounting a motor on a printed wiring board. The cylindrical motor according to claim 1, further comprising a power supply terminal (9, 11) for connecting an electrode of the motor to a power supply circuit of the printed wiring board. 3. A holder part (8) of said bracket (7).
Is formed of a conductive material, and the holder portion (8) is provided with a power supply terminal (9) for connecting the housing (2) held by the holder portion (8) to a power supply circuit of a printed wiring board. And an insulating plate (10) facing the brush stand (3) attached to the rear end of the housing (2), and a terminal provided on the brush stand (3) on the insulating plate (10). 3. A cylindrical motor according to claim 2, further comprising a power supply terminal (11) which presses against the electrode surface (6a) of the electrode (6) and connects the terminal electrode (6) to a power supply circuit of the printed wiring board. 4. The power supply terminal (9) provided on the holder part (8) also serves as a fixing terminal (12a) for fixing the bracket (7) to a printed wiring board.
The cylindrical motor as described.