JPH08275430A - Compact motor - Google Patents

Abstract

PURPOSE: To positively retain a motor by enabling a hole part without any opening at the surroundings being provided at a rising part raised from a base part to be engaged to a projecting part around an output shaft located in front of the enclosure of a motor. CONSTITUTION: Arm parts 32 and 33 are extended from a base part 31 so that they are along the outer periphery of an enclosure 2 of a motor 1. A rising part 34 is bent upward at the front edge side of a base part 31. A hole part 35 is opened with a diameter which nearly matches the outer diameter of a projecting part 3 of the motor 1 nearly at the center of the rising part 34. A leg part 36 is located at the front side of the base part 31 and is bent downward while it is partially cut. A leg part 37 is located at the rear side of the base part 31 and is bent and formed downward. A nib part 38 is bent toward the inside from the arm parts 32 and 33 and presses the rear edge part of the motor 1 to prevent pull-out toward the rear. An engagement part 39 is engaged to a recessed part provided at the rear edge of the enclosure 2 of the motor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly to a small motor having an improved holding frame.

[0002]

2. Description of the Related Art FIG. 7 is a side cross-sectional view showing an example of a motor used for a vibration generator for alerting an incoming call especially in a pager (small radio receiver: pager / product name) and a portable telephone. It is a figure. 1 is a motor, 2 is a housing,
Reference numeral 3 denotes a convex portion provided on the front end side of the housing, 4 an output shaft, 5 an oscillator arranged eccentrically with respect to the output shaft 6 for generating vibration, 6 a stator made of a permanent magnet, Reference numeral 7 is a rotor around which a wire is wound, and 8 and 9 are bearings that support the front end and the rear end of the output shaft 6.

FIG. 8 shows a holding frame 20 for holding such a motor and fixing it to the main body. Reference numeral 21 is a base portion, and 22 and 23 are arm portions, which are formed so as to extend from the base portion and extend along the outer periphery of the motor. 24 is a motor 1
And a pair of claw portions that engage with the front ends of the housings. Reference numeral 25 denotes a pair of claw portions that engage with the rear end of the motor housing. Reference numeral 26 is a leg portion, which is bent from the base portion downward in the drawing and is for fixing to a device (not shown).

In FIG. 8, the motor 1 is inserted from the rear of the holding frame 20 along the arrow until it comes into contact with the projection at the front end of the housing 1. When inserted, the claw 25 provided on the rear end side of the arms 22 and 23 is bent to fix the rear end of the motor.

[0005]

By the way, the holding frame of such a motor is provided with an opening portion at a part thereof, mainly on the upper side, in order to facilitate the assembling and the holding force to the motor. . However, due to the structure of the holding portion whose upper part is open, when holding the holding frame, the holding force of the motor depends only on the spring property of the arms 22 and 23. Therefore, when a large force is applied from the outside due to an impact such as a drop, there is a possibility that the force may come off from above the holding frame depending on the direction of the force.

The present invention solves the above-mentioned disadvantages of the prior art, and provides a motor having a simple structure and a holding frame capable of reliably holding the motor against external impact. To aim.

[0007]

The above-mentioned object is to provide a motor having an output shaft in the front and a convex portion around the output shaft, a base, a pair of arms extending from the base to surround the outer circumference of the motor, and a base. This is achieved by providing a motor having a standing frame that stands up and a holding frame that has a hole that engages with the motor protrusion in the standing part.

Further, the convex portion is a motor which is a bearing portion of the output shaft.

The holding frame is a motor which is made of plastic or metal having flexibility and elasticity and exerts a force in the direction of tightening the motor.

[0010]

The hole formed in the upright portion that rises from the base portion and having no opening in the periphery engages with the convex portion around the output shaft in the front of the motor casing. Even if the upper part of the motor is open, the motor does not slip upward.

[0011]

Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 1 is an overall perspective view of a motor showing this embodiment. FIG. 2 is an exploded perspective view of a motor showing the same embodiment. FIG. 3 is a front view of the same holding frame with a part omitted. FIG. 4 is a bottom view of the holding frame. FIG. 5 is also a side view of the holding frame. FIG. 6 is a rear view in which a holding frame is also partly omitted. In addition,
The parts given the reference numerals 1 to 5 are the same as those in the prior art, and help understanding. 1 is a motor, 2
Is a housing, 3 is a convex portion, 4 is an output shaft, and 5 is a vibrator.

Reference numeral 30 denotes a holding frame, which has flexibility or elasticity such as metal or plastics, and this gives a holding force for the motor. Reference numeral 31 denotes a base portion, and the arm portions 32 and 33 extend from the base portion. Arms 32, 3
Reference numeral 3 denotes a shape that extends from the base portion along the outer circumference of the housing 2 of the motor 1, and is formed so as to generate an inward force by setting the diameter slightly smaller than the outer circumference of the motor. I don't care. 34 is a standing part, and a base part 3
1 is bent upward at the front end side. Reference numeral 35 denotes a hole, which is opened at a substantially central portion of the upright portion 34 with a diameter substantially matching the outer diameter of the convex portion 3 of the motor 1. Reference numeral 36 denotes a leg portion, which is on the front side of the base portion 31 and is formed by bending a part of the leg portion downward. Reference numerals 37, 37 denote legs, which are formed on the rear side of the base 31 and bent downward. Reference numeral 38 denotes a claw portion, which is bent inward from each of the arm diagrams 32 and 33 to press the rear end portion of the motor 1,
Prevent it from coming out backwards. An engaging portion 39 engages with a concave portion provided at the rear end of the housing 2 of the motor 1 and fixes the concave portion.

The embodiment of the present invention is constructed as described above. According to FIG. 2, when assembling this in this embodiment, the preassembled motor 1 is first passed through the output shaft 4 through the hole 35 from the upper direction of the holding frame 30, and then the holding frames 32, 33. Push in and push in the housing 2 of the motor 1. In addition, the convex portion 3 engages with the hole portion 35 of the rising portion 34. As a result, the claws 38, 38 are attached to the housing 2
Assembly is completed by pressing the rear part and engaging the engaging parts 39, 39 with the recesses in the rear part of the housing.

[0014]

As is apparent from the above description, according to the present invention, it is possible to obtain a small-sized motor having a simple structure, in which the holding frame and the housing are difficult to separate from each other due to an external impact. I can.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a motor according to the embodiment.

FIG. 3 is a front view of a holding frame of the same.

FIG. 4 is a bottom view of the holding frame.

FIG. 5 is a side view of the holding frame of the same.

FIG. 6 is a rear view of the holding frame.

FIG. 7 is a side sectional view showing an example of a motor.

FIG. 8 is a perspective view of a holding frame showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 motor 2 housing 3 convex part 4 output shaft 5 oscillator 6 stator 7 rotor 8 bearing 9 bearing 20 holding frame 21 base 22 arm part 23 arm part 24 claw part 25 claw part 26 leg part 30 holding frame 31 base part 32 Arm part 33 Arm part 34 Standing part 35 Hole part 36 Leg part 37 Leg part 38, 38 Claw part 39, 39 Engaging part

[Procedure amendment]

[Submission date] June 16, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

Claims (3)

[Claims] 1. A motor having an output shaft in the front and having a convex portion around the output shaft, a base portion, a pair of arm portions extending from the base portion so as to surround the motor outer periphery, and an upright portion standing upright from the base portion. A small-sized motor comprising: a holding frame having a standing portion and a hole portion that engages with the motor convex portion. 2. The small motor according to claim 1, wherein the convex portion is a bearing portion of an output shaft. 3. The small motor according to claim 1, wherein the holding frame is made of flexible or elastic plastics or metal and exerts a force in a direction of tightening the motor.