JPH11155253A - Vibration generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generating device, in which vibration is generated mechanically by turning an unbalanced weight through the use of a motor and in which the unbalanced weight can be caulked and fixed surely to the shaft of the motor by using a single caulking claw. SOLUTION: An unbalanced weight 3 consists of a weight main body 5, in which a positioning part 4 to which a part of a shaft 2 is fitted, is formed and of one caulking claw 6 which is formed integrally so as to protrude from the part on one side of the positioning part 4 and which can be deformed to the side of the weight main body 5. The unbalanced weight 3 is caulked and fixed to the shaft 2 positioned in the positioning part 4, when the caulking claw 6 is deformed to the side of the weight main body 5. When the positioning part 4, to which a part of the shaft 2 is fitted is formed in the weight main body 5, the caulking claw 6 can be deformed in a state such that the shaft 2 is positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration generator for mechanically generating vibration by rotating an unbalanced weight with a motor.

[0002]

2. Description of the Related Art In a portable device such as a portable telephone device which uses a battery as a power source, a vibration generating device for mechanically generating vibration by rotating an unbalanced weight with a motor for reporting a condition to a user. Has been widely adopted. The reason is that a motor using a driving source can provide a reliable vibration operation with small power consumption and greatly contributes to prolonging the life of a battery.

[0003] In this type of vibration generator, an unbalanced weight is generally fixed to a rotating shaft of a motor by caulking.

[0004] A typical example is the actual fairness 4-1.
As disclosed in Japanese Patent No. 3860, there is a method in which an annular caulking portion is integrally formed on a part of an unbalanced weight, and after inserting a rotating shaft, at least a part of the annular caulking portion is deformed and caulked.

Recently, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-30544, a pair of caulking claws are integrally formed, and a pair of caulking claws are dropped on a rotating shaft inserted therebetween and caulked.

Further, as shown in FIG. 8, an L-shaped caulking claw 22 is integrally formed from the weight main body 21, and the unbalanced weight 24 is attached to the rotating shaft 23 by the deformation of the caulking claw 22 toward the weight main body 21. A structure having a structure for caulking and fixing is also proposed (registered design No. 917307).

[0007]

In the above prior art, when an annular caulking portion is formed integrally with a part of the unbalanced weight, it is necessary to penetrate the rotating shaft through the caulking portion each time. There was a problem.

[0008] A pair of caulking claws are integrally formed, and a pair of caulking claws are fixed to the rotating shaft inserted between them, because the rotating shaft can be set directly in an open portion between the claws. Workability can be improved. However, a special punch is required for the nail deformation, and if the deformation of both nails is not uniform, the caulking fixation itself may be uncertain.

Further, the prior art of FIG. 8 solves the former problem.
While pressing the caulking claw 22 against the root R, the caulking claw 2
It was necessary to perform the deformation of No. 2 above, and sometimes the position of the rotating shaft was deviated due to the loosening of the pressing. This has caused a great problem in terms of vibration characteristics.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to provide a high-precision vibration generator which improves the staking workability and the staking fixing characteristics.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an unbalanced weight integrally formed with a weight main body having a positioning portion into which a part of a rotating shaft is fitted, and one side of the positioning portion. The caulking claw is formed so as to protrude and can be deformed toward the main body of the weight, and the caulking claw can be deformed while the rotating shaft is positioned at the positioning portion.

[0012]

DETAILED DESCRIPTION OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a motor for rotational driving and an unbalanced weight fixed to a rotating shaft of the motor, wherein the unbalanced weight comprises a rotating shaft. A positioning body into which a part of the weight fits, and one caulking claw that is integrally formed and protruded from one side of the positioning section and is deformable toward the weight main body. The unbalanced weight is caulked and fixed by deforming the caulking claw to the weight main body side with respect to the rotating shaft.

The positioning portion may be an arc-shaped or square-shaped concave portion, or may be a portion in which a pair of ribs are erected from a weight.

One caulking claw extends in the direction of the other side of the positioning portion, and a gap larger than the outer diameter of the rotary shaft is set between the lower side of the claw and the main body of the weight. The upper surface was inclined such that the front end direction was higher, or formed with an upward projection.

Further, the above-mentioned vibration generating device is used for notifying the arrival of a portable telephone device or a pager or for notifying the time of a portable watch such as a wristwatch or a pocket watch.

By forming the positioning portion in which the part of the rotary shaft is fitted mainly to the weight, the caulking claw can be deformed while the rotary shaft is positioned on the positioning portion.

Further, by setting a gap between the lower side of the pawl and the main body of the weight larger than the outer diameter of the rotating shaft, it becomes very easy to set the rotating shaft on the positioning portion, and the upper surface of the pawl is made to have a large surface. By forming an inclined or upward projection in which the tip direction is higher, the nail can be easily deformed.

[0018]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 to 5, an unbalanced weight 3 is fixed to a rotating shaft 2 of a motor 1 as a rotary driving source to constitute a vibration generator. To put it briefly, when the motor 1 is rotated by energization, vibration is generated by the unbalanced weight of the unbalance weight 3 which rotates integrally therewith.

The unbalanced weight 3 is made of an alloy of 95% tungsten, 3% nickel, and 2% copper, or 70 to 75% tungsten, 5 to 10% nickel, and 15 to 20 copper.
% Alloy material.

Further, the unbalanced weight 3 is composed of a semicircular weight main body 5 having a positioning portion 4 recessed at the center of the upper surface, and one caulking claw 6 integrally formed from the weight main body 5. Have been. The caulking claw 6 is erected from one side of the positioning part 4 of the weight main body 5, and a tip end extends in a direction opposite to the positioning part 4.

As shown in FIG. 5, the distance T between the lower surface of the caulking claw 6 and the upper surface of the weight main body 5 is at least larger than the outer diameter D of the rotating shaft 2. Therefore, the rotating shaft 2 can be guided from the side at the same interval, and can be fitted into the concave portion which is the positioning portion 4.

In the above-described configuration, the caulking operation involves setting the motor 1 and the unbalance weight 3 in the recesses of the lower mold 7 as shown in FIGS. At this time, the rotating shaft 2 of the motor 1 is guided from the side in advance at the interval between the lower surface of the caulking claw 6 and the upper surface of the weight main body 5 and is fitted and positioned in the positioning portion 4.

Next, in this state, the upper surface of the caulking claw 6 is hit with a punch 8 to be deformed toward the weight main body 5 and caulking is performed, whereby the unbalanced weight 3 is fixed to the rotating shaft 2. FIG. 4 shows a fixed state.

Here, if the upper surface of the caulking claw 6 is set so as to be inclined such that the tip direction becomes higher, the force of the punch 8 is effectively applied to the toe, thereby deforming downward, that is, to the rotating shaft 2. Caulking can be performed reliably.

For the same purpose, it is conceivable to form an upward projection from the tip of the upper surface of the caulking claw 6.

(Embodiment 2) FIG. 6 shows an embodiment in which the positioning portion 4 is formed as a rectangular recess.

As described above, if the positioning portion 4 is formed in the shape of a rectangular recess, the rotating shaft 2 is supported at three points with respect to the positioning portion 4, so that the fixing performance can be further improved.

(Embodiment 3) Of course, the positioning portion 4 is not limited to a concave shape. For example, as shown in FIG. 7, a pair of ribs 9, 9 are erected and positioned between the ribs 9, 9. The portion 4 'may be formed.

In the case of this embodiment, the amount of unbalanced load increases, and the vibration characteristics can be improved. The vibration generating device of the embodiment described above is provided in a mobile phone device and a pager, and is used for notifying an incoming call of the generated vibration as it is or by resonating it with their housings. Of course, the present invention can also be used for time notification of a portable watch such as a wristwatch or a pocket watch.

[0031]

As is clear from the description of the above embodiment,
According to the first aspect of the present invention, since the positioning portion in which a part of the rotating shaft is fitted to the weight main body is formed, the caulking claw can be deformed in a state where the rotating shaft is positioned on the positioning portion. Therefore, the workability of caulking and fixing is remarkably improved, and in addition, a secure and accurate caulking and fixing can be obtained, and a highly accurate vibration device can be provided.

According to a third aspect of the present invention, when the positioning portion is a rectangular recess, the rotating shaft is supported at three points with respect to the recess, so that the unbalanced weight is more securely fixed to the rotating shaft. It will be.

Further, in the case where the pair of ribs are formed and the positioning portion is set between the ribs as in the invention according to the fourth aspect, the vibration characteristic can be further enhanced because the amount of offset load is sufficiently ensured. It is.

Further, by setting a gap larger than the outer diameter of the rotating shaft between the lower side of the caulking claw and the main body of the weight as in the invention according to claim 5, the rotating shaft is opened from the side of the gap. Can be inserted into the positioning portion, and the setting can be made very easy, and the workability at the time of caulking and fixing is improved.

According to a sixth aspect of the present invention, the upper surface of the caulking claw is inclined so that the tip direction is higher.
Alternatively, by forming the upper protrusion at the top end of the caulking claw, the claw can be easily and accurately deformed, and the caulking fixing characteristics can be further enhanced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a vibration generator showing an embodiment of the present invention.

FIG. 2 is a front view showing a state in which an unbalanced weight is caulked with respect to the rotation axis.

FIG. 3 is a side view showing a state in which an unbalanced weight is caulked with respect to the rotation axis.

FIG. 4 is a front view showing a state in which an unbalanced weight is swaged with respect to the rotation axis;

FIG. 5 is an explanatory diagram of an operation.

FIG. 6 is a front view showing a state in which an unbalanced weight is caulked with respect to a rotating shaft in another embodiment of the present invention.

FIG. 7 is a front view showing a state in which an unbalanced weight is caulked with respect to a rotating shaft in still another embodiment of the present invention.

FIG. 8 is a front view of a main part of a conventional vibration generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Rotating shaft 3 Unbalance weight 4, 4 'Positioning part 5 Main body of weight 6 Caulking claw 9 Rib

Claims (10)

[Claims] 1. A motor for rotational driving, and an unbalanced weight fixed to a rotating shaft of the motor, wherein the unbalanced weight is mainly composed of a weight formed with a positioning portion into which a part of the rotating shaft is fitted. And one caulking claw that is integrally formed and protruded from one side of the positioning portion and is deformable toward the weight main body. The caulking claw moves toward the weight main body side with respect to the rotating shaft positioned at the positioning portion. Vibration generator with unbalanced weight caulked by deformation. 2. The vibration generator according to claim 1, wherein the positioning portion is concave. 3. The vibration generator according to claim 1, wherein the positioning portion has a rectangular concave shape. 4. The vibration generator according to claim 1, wherein a pair of ribs are erected from the main body of the weight, and a positioning portion is formed between the ribs. 5. A caulking claw integrally projecting from one side of the positioning portion extends in the direction of the other side of the positioning portion, and rotates between the lower side of the claw and the weight main body. 2. The vibration generator according to claim 1, wherein a gap larger than the outer diameter of the shaft is set. 6. A caulking claw integrally formed and protruded from one side portion of the positioning portion extends toward the other side portion of the positioning portion, and the upper surface of the claw is inclined such that the tip direction is higher. The vibration generator according to claim 1, wherein the vibration generator is set in a shape. 7. A single caulking claw integrally formed from one side of the positioning portion extends in the direction of the other side of the positioning portion, and an upward projection is formed from the tip of the upper surface of the claw. The vibration generator according to claim 1. 8. A portable telephone device using the vibration generating device according to claim 1 for notification of an incoming call. 9. A pager using the vibration generator according to claim 1 for notification of an incoming call. 10. A portable timepiece using the vibration generator according to claim 1 for time notification.