JP3249907B2 - Contact type power supply for small motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a small-sized motor contact-type power supply device suitable as a silent sound notification means of a portable radio communication device.

[0002]

2. Description of the Related Art Many of such contact type power supply devices for small motors are used for flat type motors, and it is necessary to reduce the thickness as much as possible in order to improve the flattening rate. The actual application proposed earlier 4-65
No. 835 uses a flexible substrate as a power supply lead. The power supply device having such a structure is used by fixing the motor body to a printed wiring board or the like via a double-sided adhesive tape or the like, and soldering and connecting the power supply lead to a power supply electrode formed of a printed wiring pattern as it is. However, a recent labor saving trend is that soldering is a reflow means, and for components that cannot be reflowed, a connector type or a contact type is required, and a contact type including a spring contact has begun to be used as a power supply device.

FIG. 4 shows a conventional contact-type power supply device.
As shown in FIG. 2, a terminal board 2 having a pair of electrode patterns 2a and 2a plated with gold is attached to an end surface of the housing 1,
There is a type in which a tip 4a of a terminal 4 implanted in a brush base 3 disposed inside is protruded and connected to the electrode patterns 2a and 2a by soldering. In the figure, reference numeral 5 denotes a brush having a base end fixed to a terminal by a spot or the like, 6 denotes a flat plate commutator disposed on a rotor 7, 8 denotes a magnet for driving the rotor, and 9 denotes a case on which the magnet is mounted, which is a bracket. 10 together with the housing 1.

[0004]

The flat type motor is of an axial gap type due to its structural characteristics, and must be made of a magnetic metal in order to make the housing itself a yoke. In this case, an insulation measure is required, and the power supply unit is relatively large, and the effective sectional area of the magnet is sacrificed. In addition, there are processing problems such as the trouble of attaching the brush base to the housing, the need to attach the terminal board by aiming at the pattern hole of the terminal board at the tip of the protruding terminal, and the solder connection part. Because the height cannot be controlled,
There was also a problem that a trouble on the thickness easily occurred.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a contact type power supply device which does not require insulation measures, that is, the power supply device is compact and the characteristics are not sacrificed, the processing is simple, and the soldering connection portion is formed on the upper surface of the housing. It is an object of the present invention to provide a contact type power supply device for a small motor that can keep the thickness constant without getting in the way.

[0006]

In order to solve the above problems, the present invention utilizes the flexible power supply lead itself. Since such a power supply lead can be easily bent, a contact electrode pattern can be easily provided on the upper surface of the housing by forming an electrode pattern, and a contact is made by contacting this pattern with a spring contact. Type power supply device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a power supply device for a small motor in which a flexible substrate is led out as a power supply lead (11) from the side of a housing (1) having a flat upper surface . , To this power lead
Gold-plated contact electrode patterns (22a, 222)
The outer diameter formed in a) is almost the same size as the housing.
A portion (11a) is formed, the power supply lead is folded, and the enlarged portion (11a) is attached to the upper surface of the housing so that the contact electrode pattern portion is exposed. Fixed holder (1
3) The spring contact (12) is pressed into contact with the contact electrode pattern portion.

The contact electrode pattern section (222)
a) is composed of one unit, and the housing itself is connected to one power supply terminal.
It may be the one that was.

The contact-type power supply device for a flat motor constructed as described above does not require a hole for projecting a terminal in the housing, and therefore can be made compact, and the contact electrode can be formed by a simple means of folding the power supply lead. The pattern portion can be arranged on the upper surface of the housing.

Further, the contact electrode pattern portion (22)
2a), and the housing itself is connected to one power supply end.
In the case of a child, it can be a coin battery type.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, as a first specific embodiment, a configuration of a flat type vibration motor in which an output shaft does not protrude from a housing will be described with reference to FIG. In FIG. 1A, reference numeral 11 denotes a power supply lead made of a flexible substrate led out from a side surface of the housing 1, and a pair of gold-plated electrode patterns 22a, 22a are formed on an enlarged portion 11a, and on the back surface thereof, A double-sided pressure-sensitive adhesive sheet (trade name: Sony Chemical T4000) 22b is integrated with the separator 22c. 22d is a positioning notch,
It serves as a guide when the separator 22c is peeled off, and the flexible substrate is folded and attached to the case 99. FIG. 4B shows a completed state in which the flexible substrate 11 is folded back and adhered to the case 99. A pair of electrode patterns 22a, 22a are provided with the positioning notches 2a.
2d and a projection 9 serving as a positioning guide
9a is arranged at a predetermined position. FIG. 2 is a cross-sectional view of a main part in a state where such a flat vibration motor is mounted on a device and supplied with power. The pair of contact electrode patterns 22a and 22a are supplied with power by a gold-plated coil spring contact 12. It is supposed to be. In the figure, reference numeral 13 denotes a fixed holder arranged in a cabinet, and 14 denotes a rubber-shaped fixing member.

FIG. 3 shows a second embodiment of the present invention.
FIG. 4 is a perspective view of a main part in which a housing itself is used as one electrode as an example of FIG. That is, one large-diameter electrode pattern 222 is provided on the flexible substrate 111 as a power supply lead.
a is formed, and one of the electrode patterns is grounded in the housing 1 (not shown). When such a structure is adhered to the case 99 in the same manner as in the above-described embodiment, the large-diameter electrode pattern 222a and the housing 1 constitute positive and negative power supply electrodes, and have the same function as a coin-type battery. Will be fulfilled.

In each of the above embodiments, a flat type vibration motor having a flat housing upper surface in which the output shaft does not protrude outward is shown. Needless to say, the present invention can be applied to not only the flat type but also other small motors.

[0014]

The contact type power supply device for a small motor according to the present invention is implemented in the above-described embodiment, and has the following effects. That is, since the power supply lead formed of the flexible substrate on which the contact electrode pattern is formed can be easily bent, the power supply lead is folded and attached to the upper surface of the housing to easily provide the contact electrode pattern on the upper surface of the housing. Thus, the contact-type power supply device can be obtained such that the gold-plated spring contact is pressed against the contact electrode pattern. Therefore, unlike the conventional terminal in which the terminal is protruded from the upper surface of the housing, the configuration is simple, the workability is good, and the size can be reduced. Therefore, the characteristics are improved without sacrificing the effective sectional area of the magnet. . Also, if one electrode is grounded to the housing to form a coin battery type, after maintenance is simplified and convenience is improved.

[Brief description of the drawings]

1A and 1B show a first embodiment of a contact type power supply device for a small motor according to the present invention, wherein FIG. 1A is a perspective view before completion, and FIG.
Is a cross-sectional side view of a main part after completion.

FIG. 2 is a cross-sectional view of a main part showing a power supply state to the device.

FIG. 3 is a perspective view of a second embodiment of the device.

FIG. 4 is a longitudinal sectional view of a main part of a conventional contact type power supply device for a small motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 11,111 Power supply lead 22a, 222a made of flexible substrate Gold-plated contact electrode pattern 22d, 222d Notch 99 Case 99a Projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 5/22 B06B 1/04 H02K 7/065

Claims (2)

(57) [Claims] 1. A housing having a flat top surface.
Feed the flexible substrate from the side of (1) to the power supply lead (1).
In the power supply device for a small motor derived as 1), a gold-plated contact electrode pattern portion (22a, 222a) is formed on the power supply lead so that the outer diameter of the power supply lead is substantially equal to the housing diameter.
To form a ring and enlarged portion of the same size (11a), leaving the contact electrode pattern portion and the enlarged portions (11a) on surfaces of the housing loops back the feed lead peel
And attach the motor in this way to the equipment.
Into the fixed holder (13) on the
A contact type power supply device for a small vibration motor in which a spring contact (12) is pressed against a turn portion . 2. The contact electrode pattern section (222a).
And the housing itself as one power supply terminal
Contact power feeding device of a small motor according to claim 1.