CN1056478C

CN1056478C - Vibration generating motor for a portable apparatus

Info

Publication number: CN1056478C
Application number: CN95108538A
Authority: CN
Inventors: 本桥辉行; 石野晶英
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 1994-06-08
Filing date: 1995-06-08
Publication date: 2000-09-13
Anticipated expiration: 2015-06-08
Also published as: KR960002172A; GB9511433D0; JPH07336940A; KR0185738B1; JP2538764B2; GB2290364B; CN1121651A; GB2290364A

Abstract

To obtain a motor for generating vibration whose rotating shaft cannot be deformed easily due to shock and to miniaturize it easily by setting the clearance between a holder for holding the motor and the cylindrical part of a counterweight to the elastic deformation region or less of the rotating shaft. In a vibration-generating motor, a non-eccentricity cylindrical part 3a is provided at the tip part of a counterweight 3 which is eccentric as a deformation- prevention structure and the size of the cylindrical part 3a is so set that a clearance 4 at four locations which most approach holders 5 and 6 is set to the dimensional or less of the elastic deformation region of the material of a rotary shaft 2. Then, even if the rotating shaft 2 is deformed due to the shock due to falling, etc., the cylindrical part 3a which rotates along with the rotating shaft 2 and the counterweight 3 when the motor is rotated hits against the holders 5 and 6 and is regulated and the deformation of the rotating shaft 2 is suppressed to the deformation in an elastic deformation region based on the clearance 4, thus reducing the diameter of the rotating shaft and at the same time improving the assembly property and hence obtaining an inexpensive motor for generating vibration which is strong against shock.

Description

The vibration generating motor that is used for mancarried device

The present invention relates to be used for the vibration generating motor that mancarried device produces the vibration mode alarm types, especially, relate to vibration generating motor vibration and impact high-resistance energy.

Widely used now Pocket Bell or similar Miniature Portable Unit have the alarm device of report user receipt of call.This alarm device makes sonic vibrator or the vibrative miniature motor that produces the sound usually.This motor can comprise the semicircle eccentric weight of being adorned on the output shaft that stretches out from motor case, as instructing in Japanese Utility Model open source literature NO.4.131166.In addition, semicircle eccentric weight also can be placed in the shell.The sort of situation no matter, its pouring weight and output shaft integrally rotate to produce vibration.

One object of the present invention is to provide a kind of vibration generating motor that is used for mancarried device, and it has and the irrelevant structure of distortion that is caused by vibration and impact.

Another object of the present invention provides a kind of vibration machine motor that is used for mancarried device, and it has the structure that helps miniaturization and be easy to produce.

Its structure of vibrative motor that is used for of the present invention has the shell that holds the motor body, an output shaft that is used to transmit the rotation of motor body that from shell, stretches out, a pouring weight that is installed on the output shaft and comprises eccentric body part and non-eccentricity column part, and the support of a maintenance motor, the gap between described support and the column part is less than the elastic deformation limit scope of output shaft.

By detailed description below in conjunction with accompanying drawing, will illustrate more addressing other purpose, feature and advantage on of the present invention, its accompanying drawing is:

Figure 1A and 1B are respectively the external perspective view and the cutaway view of traditional vibration generating motor;

Fig. 2 is the external perspective view of another kind of traditional vibration generating motor;

Fig. 3 represents that tradition that the present application people finds is shaken the end view of motor problem takes place;

Fig. 4 A and 4B represent to implement the end view and the front view of vibration generating motor of the present invention respectively;

Fig. 5 A and 5B represent the end view and the front view of another embodiment of the present invention respectively;

Fig. 6 A represents the external perspective view with mancarried device shell of another embodiment of the present invention; And

Fig. 6 B and 6C are respectively the end view and the front view of motor shown in Fig. 6 A and shell.

In order better to understand the present invention, will make a brief description to the conventional motors of the correlation type shown in Figure 1A and the 1B.Shown in Figure 1A, total label is the output shaft 14 that 10 motor has shell 12 and extends out from shell 12.A semicircle eccentric weight 16 is installed on the output shaft 14.Pouring weight 16 rotates integratedly with axle 14, produces vibration thus.Such motor for example has been disclosed among the above-mentioned Japanese Utility Model open source literature NO.4-131166.

But the present inventor finds that when the device that motor 10 is housed for example fell down, the impact that is produced tended to cause that axle 14 its roots are out of shape significantly towards a side of no pouring weight 16, as shown in phantom in Figure 3.This is because pouring weight 16 has due to the semicircle configuration.

The present inventor once considered the various measures that prevent shaft distortion, for example, increased the diameter of axle and used hard material to make axle.But with respect to motor miniaturization, the diameter and the hardness of axle are restricted.

Fig. 2 represents it also is the another kind of conventional motors of being pointed out by above-mentioned open source literature NO.4-131166.As shown in the figure, for the motor that reduces the motor sound is represented with label 10A always, it has a shell 12 and is placed on semicircle eccentric weight 16a in the shell 12.The axle of this motor 10A is subjected to impelling the restriction of the minimal elastic distortion of impact, because the displacement of pouring weight 14a is subjected to the restriction of the inner periphery of shell 12a.But compare with motor 10, motor 10A has labyrinth and is difficult to miniaturization, and the motor 10 among Figure 1A and the 1B has the pouring weight 16 in shell 12 outsides.In addition, motor 10A needs special production routine.

Referring now to Fig. 4 A and 4B enforcement a kind of motor of the present invention is described.As shown in the figure, collectivity mark is that 30 motor has the shell 32 that is being kept by support 34 and 36.Semicircle eccentric weight 40 is made by the material with big proportion, and is installed on the output shaft 38 that stretches out from shell 32.Pouring weight 40 and axle 38 rotate integratedly, produce vibration thus.In order to prevent axle 38 distortion, on the end of pouring weight 40, formed the column part 40a of a non-eccentricity away from shell 32.This column part 40a has preliminary dimension (diameter), it make near the gap 42 of four positions of support 34 and 36 less than the regime of elastic deformation that constitutes axle 38 materials.

Supposing because the falling of device of motor 30 is housed makes axle 38 produce distortion.Then, when motor 30 is driven so that produce when vibration, column part 40a rotates with axle 38 and pouring weight 40.Carve at this moment, column part 40a collides the inner peripheral surface of support 34 and 36 and is subjected to the restriction of this inner peripheral surface.Therefore, axle 38 distortion is limited in the regime of elastic deformation based on gap 42.Consequently, axle 38 returns on its home position, and therefore, irrelevant with distortion all the time.

In addition, column part 40a is positioned at the end of pouring weight 40, and from the root of axle 38 farthest.Thereby, or even axle 38 small distortion also can be transformed into the obvious displacement of part 40a.As a result, make the restriction that in early days be subjected to support 34 and 36 inner peripheral surfaces of part 40a, reduced the distortion of axle 38 thus in distortion.

Another embodiment of the present invention is illustrated among Fig. 5 A and the 5B.As shown in the figure, collectivity mark is that the motor of 30A is removed with pipe 44 alternative reaching outside the support 34 and 36, and is all identical with motor 30.Especially, support 34 and 36 only should guarantee the gap 42 between the column part 40a of they and pouring weight 40.Therefore, this embodiment replaces support 34 and 36 with pipe 44 and is installed on the shell 32, also is for guaranteeing gap 42.In this configuration, column part 40a also is subjected to managing the restriction of 44 inner peripheral surfaces, just stops the distortion of axle 38.

Fig. 6 A-5C represents another embodiment of the present invention, and it is installed on the mancarried device.As shown in the figure, collectivity mark is that the electric tools of 30B has the pouring weight 40 that is formed with column part 40a.Support 46 is integral with housing parts 50, and the latter cooperates the shell of constituent apparatus with another part 48.Support 46 has part 46a, and the height that this part is provided with is at least greater than highly half of motor casing 32.With this understanding, the inner surface of column part 40a collision support 46 and

housing parts

48 and 50 when rotating and be subjected to the restriction of these inner surfaces.Consequently, axle 38 distortion have been prevented.

In the above-described embodiment, support 34,36 and 46 and pouring weight 40 between gap 42 narrow and small.Therefore, even owing to impact when making axle 38 distortion, the column part 40a of pouring weight 40 will collide support 34,36 and 46, make spools 38 to be returned to its home position thus.This makes and prevents that motor from becoming and can not work.The column part 40a that forms pouring weight 40 parts can not reduce vibratory output, guarantees because the original degree of eccentricity of pouring weight 40 is another part by pouring weight 40.

In a word, according to the present invention, vibration generating motor has the eccentric weight that comprises column part.Between column part and support, formed specific gap.In this configuration, owing to fall down or the percussion of similar reason when the motor, the distortion of motor output shaft is limited in the regime of elastic deformation.This just allows the diameter of axle to reduce, and makes motor miniaturization thus.Because pouring weight is positioned at outside the motor case, motor is easy to assembling, and cost is lower than and has the motor of pouring weight in the enclosure.Therefore, this motor is at a low price, miniaturization and high resistant and oscillation resistant and impact.

Without departing from the present invention, be subjected to the guidance of the disclosure of invention after, may make various remodeling for those skilled in the art.

Claims

1. vibration generating motor comprises:

A shell that holds described motor body;

From described shell, stretch out and be used to transmit an output shaft of described motor body rotation;

A pouring weight that is installed on the described output shaft, this pouring weight comprise an eccentric body part and a non-eccentricity column part; And

A support that keeps described motor;

Gap between wherein said support and the described column part is less than the elastic deformation limit scope of described output shaft.

2. vibration generating motor according to claim 1 is characterized in that described support and described shell form one.

3. vibration generating motor according to claim 1 is characterized in that described column part is positioned on the described pouring weight end away from described shell.

4. vibration generating motor according to claim 1 is characterized in that described pouring weight is to be made by the material with big proportion.

5. vibration generating motor according to claim 1 is characterized in that also comprising a shell that is used to install the mancarried device of described motor, and wherein said support and described mancarried device shell form one.