JP3701666B1 - Vibration generator and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator capable of obtaining a high joint strength between a vibrator and a motor rotating shaft, having good workability and productivity, and capable of being manufactured at low cost.
SOLUTION: In a state where a rotating shaft 1 of a motor is inserted into a groove formed between a pair of bearing protrusions protruding from a vibrator body 3, the both bearing protrusions are directed inwardly of the groove. By caulking, the rotary shaft 1 has a structure constrained and fixed to the caulking portions 6a and 6b, and the caulking portions 6a and 6b have at least the top portion and the upper outer surface of the outer portion at the top of the vibrator. A convex curved surface is formed in the width direction. Preferably, the lower outer surface is formed in a concave curved surface in the transducer width direction, and the upper outer surface and the lower outer surface form a continuous curved surface in the transducer width direction.
[Selection] Figure 2

Description

The present invention is, for example, relates to a vibration generator and a manufacturing method thereof which is used as a vibration alarm device or the like of the calling device or watch phone Manner Mode.

A vibration generator built in a mobile phone, a wristwatch, or the like is generally composed of a motor and a vibrator (eccentric weight) that is eccentrically fixed to a rotation shaft of the motor. By vibrating the main body, it generates vibrations for silent calls and bodily sensation alarms in manner mode.
In this type of vibration generator, the vibrator is firmly bonded to the motor rotation shaft, and the bonded state needs to be maintained for a long period of time even when the impact or vibration generator is repeatedly operated. However, since the joining portion of the vibrator and the motor rotating shaft has a very minute mounting structure between mechanical metals, it is not easy to ensure sufficient joining strength.

Many of the conventionally used joining methods of the vibrator and the motor rotating shaft are caulking processes in a state where the motor rotating shaft is disposed in a hole or groove formed in the vibrator. The following methods have been proposed.
(1) Insert a shaft hole into the projecting part projecting from the vibrator body, and with the motor rotating shaft fitted in this shaft hole, crimp the projecting part from above with a punch to deform the shaft hole. (For example, patent document 1) which joins a vibrator | oscillator and a motor rotating shaft
(2) With the motor rotating shaft placed in the groove formed in the vibrator body, compress both sides of the groove with a press piece and deform the two side walls of the groove inwardly by this compression. Then, a method of joining the vibrator and the motor rotation shaft (for example, Patent Document 2)

(3) A pair of bearing projections (claws) is provided on the vibrator body, and the motor rotation shaft is placed in the groove between the bearing projections, and both bearing projections are placed on top with a flat punch. The method of joining the vibrator and the motor rotating shaft by deforming so that the tip of the bearing projection protrudes toward the inside of the groove (see, for example, Patent Documents 3 to 6)
(4) A pair of bearing projections (claws) whose outer surfaces are tapered in the vibrator body are provided on the vibrator body, and the motor rotating shaft is inserted into the groove between the bearing projections. A method of joining the vibrator and the motor rotation shaft by pressing the projection with a caulking tool having a tapered working surface and plastically deforming the both bearing projections so as to push down toward the groove ( For example, Patent Document 7)

Japanese Utility Model Publication 4-13860 JP 2001-219124 A JP-A-11-89170 JP 2002-263577 A JP 2002-320920 A JP 2002-273344 A JP-A-6-30544

However, the above conventional joining method has the following problems.
First, in the method of (1), since it is necessary to insert the motor rotation shaft into the shaft hole from the lateral direction, the workability at the time of manufacture is poor, and the vibrator having the shaft hole has low productivity and Since the manufacturing cost increases due to the complexity of the mold configuration, there is a problem in terms of the productivity and manufacturing cost of the apparatus. In addition, if the caulking that deforms the shaft hole is performed, the motor rotating shaft itself is also deformed, which increases the load on the motor bearing and causes problems such as runout of the motor rotating shaft. Cause shrinkage.
The methods (2) to (4) above are not particularly problematic in terms of workability and production cost during production, but are considered to be due to stress concentration when caulking the upper surface of the vibrator or the bearing projection. Cracks (cracks) are likely to occur in the crimped portion and the base end portion thereof, and problems are likely to occur in the bonding strength between the vibrator and the motor rotating shaft in the as-manufactured state or at a stage where it is used to some extent.

  Furthermore, in the methods (2) and (3) described above, a large press load is used to crush the upper surface of the vibrator and the upper end of the bearing projection by pressing from above and to plastically deform so as to overhang the groove. It is necessary to perform caulking with (caulking force), and cracking is particularly likely to occur when caulking with such a large press load. Patent Documents 5 and 6 show that a vibrator having an opening width of the groove portion narrower than the outer diameter of the motor rotation shaft is used in order to reduce the press load in the method (3). However, even if a vibrator having such a structure is used, it is not possible to significantly reduce the press load, and in the same way as the vibrator used in the method (1), the productivity of the device and vibrator, Problems arise in manufacturing costs.

  In the method (4), the outer surface of the taper-shaped bearing protrusion is pressed by bringing a caulking tool having a tapered surface into contact with the surface, and the bearing protrusion is pushed down. Since tightening is performed, it is difficult to plastically deform the bearing protrusion so that the bearing protrusion is closely adhered and pressed in the circumferential direction of the motor rotation shaft, and thus the joining strength tends to be insufficient. Further, in this method, the bearing protrusion and the caulking tool must have sufficient taper accuracy to obtain the required caulking force. There is also a problem that cracks are likely to occur at the base end of the part.

  On the other hand, the size and turning radius of the vibrator cannot be made too large due to restrictions such as the thickness of the equipment to which the vibration generator is applied, and in order to improve the vibration performance of the apparatus under such restrictions, Minimize the volume of the protrusions and bearing protrusions that protrude from the vibrator body to fix the motor rotation shaft (that is, the portion that protrudes toward the anti-vibration body from the axis of the motor rotation shaft). It is necessary. However, the conventional techniques such as the above (1) to (4) have the problems as described above, and thus it is impossible to appropriately respond to such a request.

Therefore, the object of the present invention is to solve the above-described problems of the prior art, the motor rotating shaft is firmly restrained in the caulking portion of the vibrator, and the occurrence of cracks in the caulking portion and the vicinity thereof is suppressed. Accordingly, an object of the present invention is to provide a vibration generator that can obtain a high bonding strength between a vibrator and a motor rotating shaft, and that can be manufactured at a low cost with good workability and productivity during manufacturing.
Another object of the present invention is that the motor rotation shaft is firmly restrained in the caulking portion of the vibrator and the occurrence of cracks in the caulking portion and the vicinity thereof is suppressed, so that the vibrator and the motor rotate. An object of the present invention is to provide a method of manufacturing a vibration generator that can manufacture a vibration generator capable of obtaining a high joint strength with a shaft at a low cost with high productivity.

Hereinafter, in the above-described conventional methods (2) to (4), the cause of cracking at the crimped portion and the base end portion thereof and the results of investigation on the prevention measures will be described.
Among the prior arts (2) to (4) above, the above methods (2) and (3) have cracks caused by caulking with a large press load, and the above method (4) has a tapered shape. Although there is a problem inherent to the occurrence of cracks at the base end of the projection for bearings, the common cause of cracks in these conventional technologies is that a flat surface is formed in the caulking part of the vibrator. It can be considered that caulking is performed in such a form. That is, if the caulking tool is plastically deformed in a state where the upper surface of the vibrator or the bearing projection is in contact with the surface (that is, processing is performed so that a flat surface is formed in the caulking portion), stress concentration is applied to that portion. This is thought to lead to cracking. Therefore, the present inventors have studied a caulking configuration that does not cause a flat surface, and as a result, at least the top and the upper outer surface of the caulking portion constituted by the bearing projections in the vibrator width direction. It has been found that by forming a convex curved surface, preferably by forming the entire outer surface of the crimped portion into a continuous curved surface, the occurrence of cracks in the crimped portion and the vicinity thereof can be effectively prevented.

In addition, the caulking portion having such a configuration includes a bearing projection in which at least a top portion and an upper outer surface are formed in a convex curved shape in the transducer width direction, and a processing surface (work surface) is a concave curved surface in the transducer width direction. Can be obtained by caulking with a caulking tool configured in a shape, but at this time, the processing surface of the caulking tool is plastically deformed in the groove inner direction by compressing the bearing projection in a state close to point contact. In addition, since the caulking is performed while the contact point (working point) of the machining surface moves on the upper outer surface of the bearing projection in the proximal direction, the bearing projection can be efficiently deformed inward of the groove. As a result, it has been found that the bearing protrusion is brought into close contact and pressure contact with each other in the circumferential direction of the motor rotation shaft, and a high bonding strength between the motor rotation shaft and the vibrator can be obtained.
In addition, it was found that cracks due to caulking can be more reliably prevented by using a vibrator that has a relationship between the height and width of the bearing protrusion and that the outer surface shape satisfies specific conditions. .

The present invention has been made on the basis of the above findings, and the features thereof are as follows.
[1] A state in which a motor and a vibrator fixed to the rotation shaft of the motor are provided, and the rotation shaft is inserted into a groove formed between a pair of bearing projections projecting from the vibrator body in the working surface in contact with both bearing protrusion presses the projection for the dual-bearing to the vibrator body direction by crimping tool configured concavely curved in vibrator width direction, butt for the dual-bearing A vibration generating device having a structure in which a vibrator is fixed to the rotation axis by restraining the rotation axis by caulking the portion inward of the groove ,
Each of the caulking portions constituted by the pair of bearing projections has a vibration in which at least the top portion and the upper outer surface of the outer portion thereof are formed in a convex curved shape in the vibrator width direction. Generator.
[2] In the vibration generating device according to [1] above, the upper outer surface including the outer surface of the top portion of each caulking portion and the outer portion of the caulking portion is formed in a convex curved shape in the vibrator width direction. In addition, the lower outer surface including the outer surface of the base end portion of the caulking portion is configured in a concave curved shape in the transducer width direction, and the convex curved upper portion and the concave curved lower outer surface are arranged in the transducer width direction. A vibration generator characterized by comprising a continuous curved surface.

[3] In the vibration generating device according to [1] above, the upper outer surface including the outer surface of the top portion of each caulking portion and the outer portion of the caulking portion is formed in a convex curved shape in the vibrator width direction. In addition, the vibration generating device is characterized in that the lower outer surface of the caulking portion is configured as a flat surface or a convex curved surface continuous with the vibrator main body side surface in the vibrator width direction.
[4] In the vibration generating device according to any one of [1] to [3], the top of each caulking portion and the upper outer surface of both side portions thereof are formed in a convex curved shape in the vibrator width direction. Vibration generator.
[5] In the vibration generating device according to any one of [1] to [4], the tips of the two crimping portions do not contact each other or contact each other without plastic deformation, and the rotation shaft is A vibration generator characterized by being in contact with a vibrator in a circumferential direction of 200 to 360 °.

[6] A method for manufacturing a vibration generating device including a motor and a vibrator fixed to the rotation shaft of the motor, the method being formed between a pair of bearing projections projecting from the vibrator body. In the manufacturing method of fixing the vibrator to the rotating shaft by restraining the rotating shaft by caulking the both bearing protrusions in the groove portion inward direction with the rotating shaft inserted in the groove portion,
Using a vibrator in which at least the top of each bearing projection and the upper outer surface of the outer part of the bearing are configured to have a convex curved surface in the vibrator width direction, the rotation shaft of the motor is placed in the groove of the vibrator. In the inserted state, the both bearing protrusions are pressed toward the vibrator main body by a caulking tool in which the machining surface that comes into contact with the both bearing protrusions is formed in a concave curved shape in the vibrator width direction, A method for manufacturing a vibration generating device, wherein the protrusions for both bearings are caulked against the rotating shaft by plastically deforming the protrusions for the inner side of the grooves.

[7] A method of manufacturing a vibration generating apparatus including a motor and a vibrator fixed to the rotation shaft of the motor, the method being formed between a pair of bearing projections projecting from the vibrator body. In the manufacturing method of fixing the vibrator to the rotating shaft by restraining the rotating shaft by caulking the both bearing protrusions in the groove portion inward direction with the rotating shaft inserted in the groove portion,
At least the top portion of each of the bearing projections and the upper outer surface of the outer side portion thereof are configured in a convex curved shape in the vibrator width direction, and in the cross section of the vibrator width direction, the following (a) and (b) Using a vibrator in which the height H and width W of the bearing protrusion defined satisfy H ≦ W , and the motor rotating shaft is inserted into the groove of the vibrator, the bearing The two bearing projections are pressed toward the transducer body by a caulking tool having a concave curved surface formed in the transducer width direction on the machining surface that comes into contact with the projections, and the both bearing projections are plastic in the groove inner direction. A method for manufacturing a vibration generating device, wherein the projecting portion for both bearings is caulked with respect to the rotating shaft by being deformed.
(a) Height H of the bearing projection: distance between the virtual horizontal line X and the top s of the bearing projection in the imaginary center line Y direction
(b) Width W of the bearing projection: Distance between the outer base side base end b ₁ and the inner side base end b _{2 of the} bearing projection hypothesized on the virtual horizontal line X
However, virtual center line Y: virtual center line that bisects the cross section in the transducer width direction in two directions
Virtual horizontal line X: a virtual horizontal line passing through the axial center position p of the motor rotation shaft arranged in the groove and orthogonal to the virtual center line Y
[8] In the manufacturing method according to [7] above, the vibrator has a convex curved surface in the vibrator width direction, the top outer surface including the top outer surface of the top of each bearing projection and the outer surface of the outer portion of the bearing. The lower outer surface including the outer surface of the base end of the bearing projection is configured to be a concave curved surface in the vibrator width direction, and the upper surface of the convex curved surface and the lower outer surface of the concave curved surface are A method for manufacturing a vibration generating device, characterized in that a continuous curved surface is formed in the vibrator width direction.
[9] In the manufacturing method according to [7] above, the vibrator has a convex curved surface in the vibrator width direction, the top outer surface including the top outer surface of the top of each bearing projection and the outer surface of the outer portion. And a lower outer surface of the bearing projection is configured as a flat surface or a convex curved surface that is continuous with the vibrator main body side surface in the vibrator width direction.
[10] In the manufacturing method according to any one of [7] to [9] above, the vibrator is configured such that the top of each bearing protrusion and the upper outer surface of both side portions thereof are formed in a convex curved shape in the vibrator width direction. A method for manufacturing a vibration generating device, comprising:
[11] In the manufacturing method according to any one of [7] to [10] above, the vibrator has a height H and a width W of each bearing projection H / W = 0 in a cross section in the vibrator width direction. .5-1 and vibrations characterized in that the top of each of the bearing projections and the outer surface of the outer part thereof are located on or inside the virtual ellipse E defined by (c) below. A method of manufacturing a generator.
(c) Virtual ellipse E: the outer surface side base end b ₁ and the inner surface side base end b ₂ between the elliptical major axis side radius of the bearing projections which are virtual in the virtual horizontal line X, and the bearing projection Virtual ellipse with which apex s or its vicinity touches

Vibration generating device of the present invention, the motor rotary shaft in the caulked portion of the vibrator is rigidly constrained, and the generation of cracks in the caulked portion and the vicinity thereof is suppressed, circumference of the crimp portion motor shaft It can be brought into close contact and pressure contact in a tight state in the direction, and thereby, a high joint strength between the motor rotation shaft and the vibrator can be obtained. In addition, the vibration generator and the vibrator can be manufactured with good workability and productivity during manufacturing and at low cost.
Further, according to the manufacturing method of the present invention, it is possible to manufacture the vibration generator having the above-described excellent performance with high productivity and low cost.

First, a preferred embodiment of the vibration generator of the present invention will be described.
1 to 3 show an embodiment of the vibration generator of the present invention. FIG. 1 is a perspective view showing a motor rotating shaft and a vibrator fixed to the motor rotating shaft. FIG. 2 is a front view of the same. FIG. 3 is a partial enlarged view of a caulking portion in FIG. 2. 11 and 12 are front views showing the vibrator (vibrator before joining) used in the present embodiment.

  The vibration generating device includes a motor (a motor main body is not shown) and a vibrator 2 fixed to the rotating shaft 1 of the motor. The main body 3 of the vibrator 2 is a block body having a substantially semicircular cross section. As shown in FIGS. 11 and 12, the vibrator 2 before being joined to the motor rotating shaft 1 has a pair of bearing projections along the longitudinal direction of the main body 3 at the center in the width direction of the flat surface portion 30. 4a and 4b project, and a groove 5 for inserting a motor rotating shaft is formed between the bearing projections 4a and 4b. As will be described later, the shape and width of the groove 5 are basically arbitrary as long as the rotary shaft 1 can be inserted properly. However, from the viewpoint of ease of mounting the rotary shaft, the rotary shaft 1 is It preferably has a width that allows insertion from above the groove. Each of the bearing projections 4a and 4b is configured such that at least the top portion s and the upper outer surface of the outer portion thereof are convexly curved in the vibrator width direction. In such a vibrator 2, the both bearing projections 4 a and 4 b are caulked inwardly in a state where the motor rotating shaft 1 is inserted into the groove 5, and the motor rotating shaft 1 is clamped by the caulking portion. By restraining, it is fixed to the motor rotating shaft 1.

  In the vibration generator of the present invention, each of the caulking portions 6a and 6b configured by caulking the bearing protrusions 4a and 4b has at least the top portion and the upper outer surface of the outer side portion thereof, the vibrator width. Constructed in a convex curved shape in the direction. The top outer surface of the top portion and the outer portion is the portion that undergoes the largest plastic deformation when the bearing projections 4a and 4b are crimped, and this portion is a non-flat surface in the vibrator width direction, that is, a convex curved surface. By caulking so as to form a shape, stress concentration at the site and its vicinity during processing is suppressed, and the occurrence of cracks can be prevented appropriately. In addition, the preferable range etc. of the "upper outer surface" of the outer side part of each crimping part 6a, 6b are demonstrated later using FIG.

  In addition, as described later, the caulking portions 6a and 6b having the above-described configuration are obtained by converting the bearing protrusions 4a and 4b having at least a top portion and an upper outer surface into a convex curved shape in the vibrator width direction, as processed surfaces ( The work surface can be obtained by caulking with a caulking tool configured in a concave curved surface shape in the vibrator width direction. At this time, the processed surface of the caulking tool is point contact (line contact in the vibrator longitudinal direction). ) In contact with the convex curved outer surfaces of the bearing projections 4a and 4b, and the bearing projections 4a and 4b are plastically deformed inward so as to compress the contact projections (acting points). Since the caulking is performed while moving the upper outer surfaces of the bearing projections 4a and 4b in the direction of the base end, the bearing projections 4a and 4b can be efficiently deformed inward of the groove. For this reason, the caulking portions 6a, 6b (bearing protrusions 4a, 4b) can be brought into close contact with each other in the circumferential direction of the motor rotating shaft 1 and can be brought into close contact with each other. Strength is obtained.

Here, it is preferable that each crimping part 6a, 6b takes the form of the following (A).
(A) Of the top portions of the crimping portions 6a and 6b and the outer surfaces of the outer side portions, the upper outer surface including the top outer surface is formed in a convex curved shape in the vibrator width direction, and the base of the crimping portion The lower outer surface including the outer surface of the end portion is configured as a concave curved surface in the transducer width direction, and the convex outer curved upper portion and the concave curved lower outer surface form a continuous curved surface in the transducer width direction. .
As a specific example of this preferable form (A), for example, depending on the size of the range of the lower outer surface of the concave curved surface, for example, the top of each of the caulking portions 6a and 6b and the outer surface of the outer side are the following (i) or There is a configuration in which the convex curved surface and the concave curved surface in the configuration (i) or (ii) below form a continuous curved surface in the vibrator width direction.

(i) Of the outer surfaces of the top portions and the outer portions of the crimping portions 6a and 6b, the upper outer surface excluding the vicinity of the proximal end portion of the crimping portion (including “base end portion”, the same applies hereinafter) is the vibrator. The lower outer surface in the vicinity of the base end portion is formed in a concave curved surface shape in the width direction of the transducer (= a configuration in which the range of the lower outer surface of the concave curved surface shape is relatively small).
(ii) Of the outer surfaces of the top portions of the caulking portions 6a and 6b and the outer side portions thereof, the upper outer surface including the top outer surface is configured in a convex curved shape in the vibrator width direction, and the base of the caulking portion The vicinity of the end (including the “base end”; the same applies hereinafter) and the lower outer surface including the outer surface on the upper side are configured in a concave curved surface in the vibrator width direction (= the range of the concave outer curved lower outer surface) Is a relatively large form).
In addition, in the configuration of (i) and (ii), which is the form of (i) above and specific examples thereof, the preferred ranges of the “upper outer surface” and “lower outer surface” of each of the caulking portions 6a, 6b, etc. This will be described later with reference to FIG.

Here, in the configuration of (i) and (ii), which is the configuration of (i) above and specific examples thereof, the base end portion of the outer portion of each of the caulking portions 6a, 6b refers to each of the vibrator main body 3 The root part of the caulking part 6a, 6b is pointed out. On the other hand, the outer surface side base end portion b _k1 and the inner surface side base end portion b _k2 of each of the caulking portions 6a and 6b for determining the height H _k and the width W _{k of the} caulking portion described later are as follows. crimping portion 6a which is virtual in the virtual horizontal line X _k as defined, it refers to a base end portion of 6b.
Virtual center line Y _k : Virtual center line that bisects the cross section in the transducer width direction bilaterally symmetric Virtual horizontal line X _k : A virtual horizontal line that passes through the axial center position p of the motor rotation axis and is orthogonal to the virtual center line Y _k

Therefore, in the apparatus using the vibrator as in the embodiment (FIGS. 1 to 3) and the embodiment shown in FIGS. 4 to 7, the configuration (i) and the configurations (i) and (ii) are used. Although the outer surface side base end b _k1 of the caulking portion which is virtual in the virtual horizontal line X _k and the base end portion of the outer portion of the crimped portion (root portion of the crimp portion) coincides, for example, FIG. In the case of the apparatus using the vibrator as shown in FIG. 8, each caulking virtually imagined on the base end portion b _k (the base portion of the caulking portion) and the virtual horizontal line X _{k of} each caulking portion. The outer surface side base end part b _k1 of the part is different.

Each caulking part 6a, 6b of the present embodiment has the configuration (i). In FIG. 3 showing the present embodiment, s _k is the top portion, 7 is the outer surface of the outer portion than the top portion s _k , and b _k1 is the outer surface of each caulking portion imaginary on the virtual horizontal line X _k. The side base end portion, _bk2, is also the inner surface side base end portion. Further, the outer surface side base end portion b _k1 is also the base end portion (the base portion of each caulking portion 6a, 6b with respect to the vibrator body 3) of the outer side portion of each caulking portion 6a, 6b in the configuration (i). is there.

Each clamping portion 6a, 6b, of the top s _k and the outer surface 7 of the outer portion than that, the crimp portion 6a, the upper outer surface 70 excluding the base end portion b _k1 near 6b is convex in the vibrator width direction The lower outer surface 71 in the vicinity of the base end b _k1 is configured as a concave curved surface in the transducer width direction, and the convex curved surface and the concave curved surface form a continuous curved surface in the transducer width direction. ing. By thus constituting a curved shape in the vibrator width direction across the outer surface 7 which includes a top s _k, stress concentration to the crimp portion outer surface during processing is more effectively suppressed. Further, the caulking portion 6a, the proximal end portion b _k1 near 6b especially crack is easily generated but, by the outer surface of the part and the concave curved surface, it is also suitably prevented occurrence of such cracks it can.
Further, in the apparatus of the present invention, the crimp portion 6a as in this embodiment, in the upper outer surface (Figure 3 top s _k及both side portions thereof 6b, 74 is the upper outer surface of the inner portion than the apex s _k Is preferably formed in a convex curved shape in the vibrator width direction. This is because, when the top portion _sk is in a sharp shape, a defect may occur in the portion at the time of manufacturing the vibrator or caulking.

Furthermore, in the apparatus of the present invention, the tip ends of the crimping portions 6a and 6b do not contact each other or contact each other without plastic deformation, and the motor rotating shaft 1 has a circumferential direction of 200 to 360 °. The caulking portions 6a and 6b are preferably configured to contact the vibrator 2 within a range (contact angle θ shown in FIG. 2). If the front ends of the crimping portions 6a and 6b are in contact with each other in a state where they are plastically deformed, the binding force of the motor rotating shaft 1 by the crimping portions 6a and 6b may be weakened. On the other hand, when the motor rotating shaft 1 is crimped, a part or all of the outer circumferential surface thereof is in close contact with and pressed against the inner surface of the groove 5 on the vibrator side and the crimping portions 6a and 6b. If the contact angle θ with the vibrator side in the circumferential direction of the motor rotation axis is less than 200 °, it may not be possible to obtain a sufficient binding force of the motor rotation axis. In addition, the caulking tool may hit the motor rotating shaft 1 during caulking, and the motor rotating shaft may be deformed.
In the present embodiment, the tip ends of both the crimping portions 6a and 6b do not contact each other, and the motor rotating shaft 1 is within the range of about 220 ° in the circumferential direction of the vibrator 1 (the groove portion 5 and the crimping portions 6a and 6b). It is in contact with the inner surface.

Furthermore, the apparatus of the present invention, each clamping portion 6a, 6b, in the transducer widthwise sectional, and a height H _k and the width W _k of the caulking portion which is defined by the following (a) and (b) , H _k ≦ W _k is preferably satisfied.
(a) the height of the crimp portion H _k: the distance between the apexes s _k of the imaginary horizontal line X _k and the caulking portion of the imaginary center line Y _k direction
(b) Width of caulking part W _k : Distance between outer surface side base end part b _1k and inner surface side base end part b _{2k of the caulking} part imagined on virtual horizontal line X _{k By adopting} such a configuration And the stress concentration to the specific site | part at the time of caulking is eased, and generation | occurrence | production of a crack can be suppressed more effectively.

Further, when the curvature of the convex curved surfaces of the caulking portions 6a and 6b is excessively large, or when the width W of the caulking portions 6a and 6b is excessively large with respect to the height H, the outer surfaces of the caulking portions 6a and 6b are changed. It becomes difficult to obtain the effects of the present invention due to the convex curved surface, and the volume of the crimping portions 6a and 6b is increased to reduce the vibration performance of the vibration generator.
For this reason, in the device according to the present invention, the height H _k and the width W _{k of the} caulking portions 6a and 6b are H _k / W _k = 0.5 to 1, preferably 0.7. -0.8 and the top part s _{k of} each crimped part 6a, 6b and the outer surface 7 of the outer side part thereof are located on or inside the virtual ellipse E _k defined by (c) below. Thus, it is preferable to constitute the caulking portions 6a and 6b.
(c) Virtual ellipse E _k : A radius between the outer surface side base end b _k1 and the inner surface side base end b _{k2 of the caulking} portion imaginary on the virtual horizontal line X _k is set to the ellipse major axis side radius, and Virtual ellipse with which apex _sk or its vicinity is in contact

By setting it as such a structure, the outer surface of the crimping parts 6a and 6b can be comprised in an appropriate convex curve shape, without increasing the volume of the crimping parts 6a and 6b.
Moreover, in order to optimize clamping portion 6a, and 6b volume, it is preferable to limit crimp portion 6a to the outer diameter D of the motor rotation shaft 1, the width W _k of 6b, specifically, It is preferable to satisfy W _k / D ≦ 2, particularly preferably W _k /D≦1.5.

4 to 6 show another embodiment of the vibration generator of the present invention. FIG. 4 is a perspective view showing a motor rotating shaft and a vibrator fixed to the motor rotating shaft. FIG. 6 is a partially enlarged view of the caulking portion of FIG. FIG. 13 is a front view showing the vibrator (vibrator before joining) used in this embodiment.
In this embodiment, each of the crimped portions 6a and 6b has the above-described configuration (i) as in the embodiment of FIGS. 1 to 3, but the distal ends of both the crimped portions 6a and 6b are The caulking portions 6a and 6b are configured such that they are brought into contact with each other without being plastically deformed, and the motor rotating shaft 1 is in contact with the vibrator 2 in a range of approximately 360 ° in the circumferential direction.
Since other configurations are the same as those of the embodiment of FIGS. 1 to 3, the same reference numerals are given, and detailed description thereof is omitted. Therefore, preferable conditions of the apparatus are the same as those in the embodiment of FIGS.

FIG. 7 shows another embodiment of the vibration generator of the present invention, and is a front view showing a motor rotation shaft and a vibrator fixed to the motor rotation shaft. FIG. 14 is a front view showing the vibrator (vibrator before joining) used in the present embodiment.
In this embodiment, each caulking portion 6a, 6b has the above-described configuration (ii). In addition, the outer surface side base end portion b _k1 in the present embodiment is the base end portion of each of the caulking portions 6a and 6b in the configuration (ii) (the caulking portions 6a and 6b with respect to the vibrator main body 3). It is also the root).

Each caulking portion 6a, 6b, of the outer surface 7 of its top s _k and the outer portion than that, together with the upper outer surface 72 which includes an outer surface of the top s _k is configured in a convex curved shape in vibrator width direction, The lower outer surface 73 including the outer surface near the base end b _k1 and the upper side is configured as a concave curved surface in the transducer width direction, and the convex curved surface and the concave curved surface form a continuous curved surface in the transducer width direction. are doing. As with the embodiment of Figures 1-3, by forming a curved surface with vibrator width direction across the outer surface 7 thus including top s _k, more stress concentration to the crimp portion outer surface during processing Effectively suppressed. Further, by forming the lower outer surface 73 including the outer surface in the vicinity of the base end part b _k1 into a concave curved surface in the vibrator width direction, it is possible to appropriately prevent the occurrence of cracks in the vicinity of the base end part b _k1 .
Since other configurations are the same as those of the embodiment of FIGS. 1 to 3, the same reference numerals are given, and detailed description thereof is omitted. Therefore, preferable conditions of the apparatus are the same as those in the embodiment of FIGS.

The vibration generator of the present invention can take various forms other than the embodiment described above. For example, the vibrator shown in FIGS. 15 to 18 described below may be used. In these cases, the preferable conditions of the apparatus are the same as those in the embodiment shown in FIGS.
FIG. 8 shows an embodiment of a vibration generator using the cross-sectional fan-shaped vibrator shown in FIG. In this embodiment, each of the caulking portions 6a and 6b has the above-described configuration (i) as in the embodiment of FIGS. 1 to 3, but as described above, the above (i) Base end portions b _k of the outer portions of the caulking portions 6a, 6b in the configuration (the base portions of the caulking portions 6a, 6b with respect to the vibrator main body 3) and the outer surface side base ends imaginary on the virtual horizontal line X _k The part b _k1 is different.

Also in this embodiment, the virtual center line Y _k (virtual center line that bisects the cross section in the transducer width direction bilaterally) and the virtual horizontal line X _k (axial center position p of the motor rotation shaft arranged in the groove) , And a virtual horizontal line orthogonal to the virtual center line Y) is uniquely determined. Therefore, the outer surface side proximal end portion b _k1 and the inner surface side proximal end portion of the crimped portions 6a and 6b according to the above-described definition. The position of b _k2 , the range of the height H _k and the width W _k of the crimped portions 6a and 6b, the position of the virtual ellipse E _k , and the like are also uniquely determined.
Since other configurations are the same as those of the embodiment of FIGS. 1 to 3, the same reference numerals are given, and detailed description thereof is omitted. Therefore, preferable conditions of the apparatus are the same as those in the embodiment of FIGS.

FIG. 9 shows an embodiment of a vibration generating apparatus using the cross-sectional fan-shaped vibrator shown in FIG. Each of the caulking portions 6a and 6b of this embodiment includes a base end portion (each caulking portion with respect to the vibrator main body 3) having the above-described configuration (a) and the specific examples (i) and (ii). There are no fastening portions 6a and 6b). That is, each clamping portion 6a, of the outer surface 7 of the top s _k and the outer portion than that of 6b, together with the upper outer surface 75 which includes a top outer surface is configured in a convex curved shape in vibrator width direction, the lower outer surface 76 Is configured to be a flat surface or a convex curved surface that is continuous (continuously flush) with the side surface 31 of the vibrator body 3.
Even with the above-described structure, stress concentration on the outer surface of the crimped portion during processing is more effectively suppressed. Furthermore, the crimp portion 6a as mentioned above, the base end portion b _k1 near 6b are particularly susceptible to cracks occur, caulking portion 6a, eliminating base end portion itself of 6b as in this embodiment Thus, occurrence of such cracks can be appropriately prevented.

Also in this embodiment, the virtual center line Y _k (virtual center line that bisects the cross section in the transducer width direction bilaterally) and the virtual horizontal line X _k (axial center position p of the motor rotation shaft arranged in the groove) , And a virtual horizontal line orthogonal to the virtual center line Y) is uniquely determined. Therefore, the outer surface side proximal end portion b _k1 and the inner surface side proximal end portion of the crimped portions 6a and 6b according to the above-described definition. The position of b _k2 , the range of the height H _k and the width W _k of the crimped portions 6a and 6b, the position of the virtual ellipse E _k , and the like are also uniquely determined.
Since other configurations are the same as those of the embodiment of FIGS. 1 to 3, the same reference numerals are given, and detailed description thereof is omitted. Therefore, preferable conditions of the apparatus are the same as those in the embodiment of FIGS.

In the vibration generator of the present invention, it is particularly preferable that the caulking portions 6a and 6b (bearing protrusions 4a and 4b) are provided over the entire length of the vibrator 2 from the viewpoint of bonding strength. It can also be provided only in a partial range in the longitudinal direction of the vibrator. For example, a configuration in which the caulking portions 6a and 6b (bearing protrusions 4a and 4b) are provided only in a predetermined range in the central portion in the longitudinal direction of the transducer, a configuration in which the crimping portions 6a and 6b are provided only in a predetermined range at both ends in the transducer longitudinal direction, and the transducer Although the form etc. which are provided only in the range of about half on one side in the longitudinal direction can be exemplified, it is not limited to these.
The vibrator 2 constituting the vibration generating device of the present invention is preferably made of a sintered body of high specific polymerization gold such as a tungsten alloy as in the conventional device. The vibrator 2 preferably has high ductility so that it can be appropriately plastically deformed when the bearing protrusions 4a and 4b are caulked, and in particular, such high ductility is subjected to a special heat treatment. It is preferable from the viewpoints of productivity, manufacturing cost, and the like. From such a viewpoint, for example, as shown in Japanese Patent No. 3122225, W: 85 to 98 mass%, Ni: 1 to 12 mass%, Mo: 0.1 mass% or more and less than 2.0 mass%, Fe: 1.0 mass % Or less and an inevitable impurity that is not subjected to heat treatment after sintering is suitable.

Each of the caulking portions 6a and 6b of the vibration generator of the present invention has at least the top portion and the upper outer surface of the outer side portion formed in a convex curved surface shape in the vibrator width direction. As shown in FIG. 10 (1), the upper outer surface has a height range h _k1 (h _k1 > H _k / 3) exceeding 1/3 of the height H _k of the crimped portion. It is preferable to do. The upper outer surface of the above-described range of each of the crimped portions 6a and 6b is a portion that undergoes significant plastic deformation when the bearing projections 4a and 4b are crimped, and this portion has a convex curved surface in the vibrator width direction. By performing the caulking process in this manner, the stress concentration on the part and its vicinity during the process is suppressed, and the occurrence of cracks can be prevented appropriately.

The upper surface of the convex curved surface only needs to be configured in accordance with the various conditions as described above. Therefore, there is no particular limitation on the radius of curvature R of the convex curved surface of the upper outer surface, but generally 0.2-1. It is appropriate that the radius of curvature is 7 mm, preferably about 0.3 to 1.5 mm. The radius of curvature R of the convex curved surface may change continuously in the vibrator width direction.
The radius of curvature R of the convex surface of the upper outer surface preferably satisfies R / r = 0.4 to 6.8 in relation to the radius r of the radial cross section of the motor rotating shaft 1.

In addition, the configuration of (a) and (ii), which are specific examples of the above-described (A), which is a preferable mode of each crimping portion 6a, 6b, are as follows.
In the form of (a) described above, the top outer surface including the top outer surface of the top portions of the crimping portions 6a and 6b and the outer portions outside the crimped portions 6a and 6b is configured in a convex curved shape in the vibrator width direction. The lower outer surface including the outer surface of the base end portion of the caulking portion is configured as a concave curved surface in the vibrator width direction, but the upper outer surface configured as a convex curved surface is caulked as in FIG. When the height H _{k of the} part is used as a reference, it is preferable that the height range h _k1 (h _k1 > H _k / 3) exceeds 1/3. Therefore, the lower outer surface of the concave curved surface shape, it is preferable to 2/3 less than the height range of the height H _k of the crimp portion.

The upper surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration (b) may be configured in accordance with the various conditions already described. Therefore, the curvature radius R of the convex curved surface and the concave curved surface is special. In general, however, the convex surface of the upper outer surface is 0.2 to 1.7 mm, preferably 0.3 to 1.5 mm, and the concave surface of the lower outer surface is 0.2 to 1.4 mm, preferably Is appropriately set to a curvature radius of about 0.3 to 1.2 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the radius of curvature R of the convex surface of the upper outer surface is about R / r = 0.4 to 6.8, and the concave surface of the concave surface of the lower outer surface. It is preferable that the curvature radius R satisfies R / r = about 0.4 to 5.6, respectively.

In the configuration of (i), which is a specific example of the form of (a) above, the upper outer surface excluding the vicinity of the base end portion of the crimping portion among the top surfaces of the crimping portions 6a and 6b and the outer surfaces outside the crimping portions 6a and 6b Is formed in a convex curved surface shape in the transducer width direction, and the lower outer surface in the vicinity of the proximal end portion is configured in a concave curved surface shape in the transducer width direction. When the height H _k of the crimped portion is used as a reference, as shown in FIG. 10 (2), the height range h _k2 (h _k2 ≧ 2H _k / 3) should be 2/3 or more. preferable. Therefore, it is preferable that the lower outer surface configured in a concave curved surface has a height range h _k3 (h _k3 ≦ H _k / 3) that is 1/3 or less of the height H _k of the crimped portion.

The upper surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration of (i) may be configured according to the various conditions as described above. Therefore, the curvature radius R of the convex curved surface and the concave curved surface is special. In general, the convex surface of the upper outer surface is 0.9 to 1.7 mm, preferably about 1.1 to 1.5 mm, and the concave surface of the lower outer surface is 0.2 to 0.5 mm. The curvature radius is preferably about 0.3 to 0.4 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the curvature radius R of the convex surface of the upper outer surface is about R / r = 1.8 to 6.8, and the concave curved surface of the lower outer surface is about. It is preferable that the radius of curvature R satisfies R / r = about 0.4 to 2, respectively.

Further, in the configuration of (ii) described above, the top outer surface including the top outer surface of the top portions of the caulking portions 6a and 6b and the outer portions outside the crimp portions 6a and 6b is formed in a convex curved shape in the vibrator width direction. In addition, the lower outer surface including the vicinity of the base end portion of the caulking portion and the outer surface on the upper side is configured as a concave curved surface in the vibrator width direction, but the upper portion configured as a convex curved surface. As shown in FIG. 10 (3), the outer surface should have a height range h _k4 (h _k4 > H _k / 3) exceeding 1/3 of the height H _k of the crimped portion as a reference. Is preferred. Therefore, it is preferable that the lower outer surface configured in a concave curved surface has a height range h _k5 (h _k5 <2H _k / 3) that is less than 2/3 of the height H _k of the crimped portion.

The convex outer surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration of (ii) may be configured according to the various conditions as described above, and therefore the curvature radius R of the convex curved surface and the concave curved surface is set. Although there is no special limitation, generally, the convex surface of the upper outer surface is 0.2 to 0.5 mm, preferably about 0.3 to 0.4 mm, and the concave surface of the lower outer surface is 0.6 to 1.4 mm. The radius of curvature is preferably about 0.8 to 1.2 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the curvature radius R of the convex surface of the upper outer surface is about R / r = 0.4-2, and the curvature radius of the concave surface of the lower outer surface is about R / r = 0.4-2. R preferably satisfies R / r = about 1.2 to 5.6, respectively.
Further, in the embodiment shown in FIG. 9, the height H of the caulking portion is also applied to the upper outer surface 75 configured in the convex curved shape of each caulking portion 6a, 6b for the same reason as in FIG. _{When k} is used as a reference, the height range h _k1 (h _k1 > H _k / 3) is preferably more than 1/3. Similarly, the radius of curvature R of the upper outer surface 75 is suitably about 0.2 to 1.7 mm, preferably about 0.3 to 1.5 mm.

Next, a preferred embodiment of a vibrator applied to the apparatus of the present invention will be described. This vibrator is a vibrator for a vibration generating device including the motor and the vibrator fixed to the rotation shaft of the motor as described above.
11 and 12 show one embodiment of a vibrator applied to the apparatus of the present invention (the vibrator used in the apparatus of FIGS. 1 to 3), FIG. 11 is a front view, and FIG. 11 is a partially enlarged view of a bearing protrusion 11. FIG.
The main body 3 of the vibrator 2 of the present embodiment is a block body having a substantially semicircular cross section, and a pair of bearing protrusions along the longitudinal direction of the main body 3 at the center position in the width direction of the flat surface portion 30 of the main body 3. The parts 4a and 4b are projected, and a groove part 5 for inserting the motor rotating shaft is formed between the bearing projections 4a and 4b. Needless to say, the groove 5 needs to have a width that allows the rotary shaft 1 to be disposed, but it is preferable that the groove 5 has a width that allows the rotary shaft 1 to be inserted from above the groove.

Each of the bearing protrusions 4a and 4b of the vibrator 2 is configured so that at least the top part and the upper outer surface of the outer part thereof are convex curved in the vibrator width direction, and as shown in FIG. In the cross section in the child width direction, the height H and the width W of the bearing protrusion defined by the following (a) and (b) satisfy H ≦ W.
(a) Height H of the bearing projection: distance between the virtual horizontal line X and the top s of the bearing projection in the imaginary center line Y direction
(b) the width W of the projection bearings: where the distance between the outer surface side base end b ₁ of the bearing projections which are virtual in the virtual horizontal line X inner surface side base end b _2, above (a) and In (b), the virtual horizontal line Y and the virtual horizontal line X are defined as follows.
Virtual center line Y: Virtual center line that bisects the cross section in the transducer width direction bilaterally Virtual horizontal line X: Passes the axial center position p of the motor rotation shaft arranged in the groove and is orthogonal to the virtual center line Y Virtual horizon

  The top of each of the bearing projections 4a and 4b and the upper outer surface of the outer side of the bearing projections 4a and 4b are the most plastically deformed portions when the bearing projections 4a and 4b are crimped, and this portion is defined as the vibrator width. By forming a convex curved surface in the direction and using a crimping tool having a concave curved processing surface (work surface) as will be described later, the convex curved surface can be used for crimping. The stress concentration at the site and the vicinity thereof is suppressed, and the occurrence of cracks can be prevented appropriately. A preferable range of the “upper outer surface” of the outer side portion of each of the bearing projections 4a and 4b will be described later with reference to FIG.

  Further, during the caulking as described above, the processing surface of the caulking tool comes into contact with the convex curved outer surfaces of the bearing projections 4a and 4b in a state close to point contact (line contact in the vibrator longitudinal direction), The bearing projections 4a and 4b are compressed and deformed in the groove inner direction so as to be compressed, and the contact point (action point) of the machining surface moves on the upper outer surface of the bearing projections 4a and 4b toward the base end. Since caulking is performed, the bearing protrusions 4a and 4b can be efficiently deformed inward of the groove. For this reason, the bearing protrusions 4a and 4b are brought into close contact and pressure contact with each other in the circumferential direction of the motor rotating shaft 1, and a high bonding strength between the motor rotating shaft 1 and the vibrator 2 is obtained.

  When the height H and the width W of the bearing projection defined by (a) and (b) are H> W, the bearing projections 4a and 4b are pushed down during the caulking process. In particular, since the plastic deformation is performed in such a manner that it can be bent (bent), the base end portion is greatly elongated and cracking is likely to occur. On the other hand, when H ≦ W, the shape of the plastic deformation of the bearing projections 4a and 4b during the caulking process is convex rather than being pushed down (bended) by the load of the caulking tool. The curved inclined outer surface is compressed and deformed so as to be crushed. That is, it becomes a form of plastic deformation in which the compression mode is more dominant than the bending mode. For this reason, the stress concentration to specific parts, such as the base end part of the bearing projections 4a and 4b, is alleviated, and a caulking process that hardly causes cracking can be performed. Further, when H ≦ W, when the metal powder is filled in the mold in the manufacturing process of the vibrator by powder metallurgy, the filling property of the metal powder at the bearing protrusions 4a and 4b becomes good, and the molding is performed. There is also an advantage that the performance is improved.

Here, each of the bearing projections 4a and 4b preferably takes the following form (b).
(B) Of the tops of the respective bearing projections 4a and 4b and the outer surfaces of the outer sides thereof, the upper outer surface including the top outer surface is formed into a convex curved surface in the vibrator width direction, and the bearing projections The lower outer surface including the outer surface of the base end portion is formed in a concave curved surface shape in the vibrator width direction, and the upper surface of the convex curved surface and the lower outer surface of the concave curved surface form a continuous curved surface in the vibrator width direction. Constitute.
As a specific example of this preferable form (b), depending on the size of the range of the concave curved lower outer surface, for example, the tops of the respective bearing projections 4a and 4b and the outer surfaces of the outer parts are the following (i) Alternatively, there is a configuration in which the convex curved surface and the concave curved surface in the configuration (i) or (ii) below form a continuous curved surface in the vibrator width direction.

(i) Of the outer surfaces of the top and outer sides of the bearing projections 4a and 4b, the upper outer surface excluding the vicinity of the base end of the bearing projection (including “base end”, the same applies hereinafter) Formed in a convex curved surface shape in the transducer width direction, and the lower outer surface in the vicinity of the base end portion is configured in a concave curved surface shape in the transducer width direction (= a form in which the range of the concave outer curved lower outer surface is relatively small) ).
(ii) Of the tops of the bearing projections 4a and 4b and the outer surfaces of the outer sides thereof, the upper outer surface including the top outer surface is formed in a convex curved shape in the vibrator width direction, and the bearing projections The lower outer surface including the base end portion (including “base end portion”, the same applies hereinafter) and the upper outer surface thereof is configured in a concave curved surface shape in the vibrator width direction (= the lower outer surface having a concave curved surface shape). Is a relatively large form).
In the configuration of (b) above and the configurations of (i) and (ii), which are specific examples thereof, the preferred ranges of the “upper outer surface” and “lower outer surface” of each of the bearing projections 4a, 4b are as follows. This will be described later with reference to FIG.

Here, in the configuration of (i) and (ii), which is the embodiment (b) and the specific example thereof, the base end portion of the outer portion of each of the bearing projections 4a and 4b refers to the vibrator main body 3. It refers to the base of each bearing projection 4a, 4b. On the other hand, the outer surface side base end b ₁ and the inner surface side base end b ₂ of each of the bearing protrusions 4a and 4b for determining the height H, width W and the like of the bearing protrusion are defined as described above. bearing projections 4a which are virtual in the virtual horizontal line X _k being, refers to the base end portion of 4b.
Therefore, in the vibrators according to the present embodiment (FIGS. 11 and 12) and the embodiments shown in FIGS. 13 to 16, the bearing protrusions in the above-described configurations (b) and (i) and (ii) are used. The base end portion (the base portion of the bearing projection) on the outer side of the portion coincides with the outer surface side base end b _{1 of} each bearing projection virtually assumed on the virtual horizontal line X. For example, FIG. In the vibrator as shown, the base end portion b (the base portion of the bearing projection) on the outer side of each bearing projection and the outer surface side base end b of each bearing projection imaginary on the virtual horizontal line X. ₁ will be different.

Each of the bearing projections 4a and 4b of the present embodiment has the configuration (i). In FIG. 12 showing the present embodiment, s is the top, 8 is the outer surface of the outer side of the top s, and b ₁ is the outer surface side base of each bearing projection projected on the virtual horizontal line X. end, b ₂ is also the inner surface side base end portion. The outer surface side base end b ₁ is a base end of the outer side of each bearing projection 4a, 4b in the configuration of (i) (the base of each bearing projection 4a, 4b with respect to the vibrator body 3). It is also.
Each bearing projections 4a, 4b, of the outer surface 8 of the top s and the outer portion than the convex upper outer surface 80 excluding the bearing projection 4a, the base end b ₁ near the 4b is in vibrator width direction The lower outer surface 81 in the vicinity of the base end b ₁ is configured as a concave curved surface in the transducer width direction, and the convex curved surface and the concave curved surface form a continuous curved surface in the transducer width direction. ing. As described above, the entire outer surface 8 including the top portion s is configured in a curved shape in the vibrator width direction, whereby stress concentration on the outer surface of the crimped portion during processing is more effectively suppressed. The bearing projection 4a, proximal end b ₁ near the 4b, especially crack is easily generated but, by the outer surface of the part and the concave curved surface, it also appropriately prevent occurrence of such cracking Can do.

Further, in the vibrator applied to the apparatus of the present invention, as in the present embodiment, the top s of each of the bearing projections 4a and 4b and the upper outer surfaces of both side portions (in FIG. 12, 84 is inside the top s). (Showing the upper outer surface of the portion) is preferably formed in a convex curved shape in the vibrator width direction. This is because, when the top portion s has a sharp shape, there is a possibility that a defect may occur at the time of manufacturing or caulking the vibrator.
The vibrator can obtain a desired effect when the outer surface of the bearing projections 4a and 4b satisfies the above-described conditions. However, if the curvature of the convex curved surface of the bearing projections 4a and 4b is excessively large, or if the width W of the bearing projections 4a and 4b is excessively large with respect to the height H, the bearing projections 4a and 4b It is difficult to obtain the effect of the present invention by making the outer surface of the convex surface curved, and the volume of the bearing projections 4a and 4b is increased to reduce the vibration performance of the vibration generator.

For this reason, the vibrator has a height H and a width W of the bearing projections 4a and 4b of H / W = 0.5 to 1, preferably 0.7 to 0.8 in the cross section in the vibrator width direction. Satisfactory and the bearing protrusions 4a, 4b so that the apex s of each bearing protrusion 4a, 4b and the outer surface 8 outside thereof are located on or inside the virtual ellipse E defined in (c) below. It is preferable to constitute the parts 4a and 4b.
(c) Virtual ellipse E: the outer surface side base end b ₁ and the inner surface side base end b ₂ between the elliptical major axis side radius of the bearing projections which are virtual in the virtual horizontal line X, and the bearing projection Virtual ellipse with which apex s or its vicinity touches

By setting it as such a structure, the outer surface of the bearing projections 4a and 4b can be comprised in an appropriate convex curve shape, without increasing the volume of the bearing projections 4a and 4b.
In order to further optimize the volume of the bearing projections 4a and 4b, it is preferable to limit the width W of the bearing projections 4a and 4b with respect to the outer diameter D of the motor rotating shaft 1, specifically, , W / D ≦ 2, particularly preferably W / D ≦ 1.5. The height H of the bearing projections 4a and 4b with respect to the outer diameter D of the motor rotating shaft 1 is determined according to the contact angle θ on the vibrator side in the circumferential direction of the motor rotating shaft.

FIG. 13 is a front view showing another embodiment of the vibrator applied to the apparatus of the present invention (the vibrator used in the apparatus of FIGS. 4 to 6).
The vibrator 2 of the present embodiment is similar to the embodiment of FIGS. 11 and 12 in which the bearing protrusions 4a and 4b have the above-described configuration (i), but are shown in FIGS. In this way, the ends of the crimped portions 6a and 6b after crimping are in contact with each other without plastic deformation, and the motor rotating shaft 1 is in contact with the vibrator 2 in the range of approximately 360 ° in the circumferential direction. Therefore, the ratio H / W of the height H to the width W of the bearing projections 4a and 4b is larger than that of the vibrator shown in FIGS. , H ≦ W).
Since other configurations are the same as those of the embodiment of FIGS. 11 and 12, the same reference numerals are given and detailed description thereof is omitted. Therefore, preferable conditions for the vibrator are the same as those in the embodiment of FIGS.

FIG. 14 is a front view showing another embodiment of the vibrator applied to the apparatus of the present invention (vibrator used in the apparatus of FIG. 7).
In this embodiment, each of the bearing projections 4a and 4b has the configuration (ii) described above. In addition, the outer surface side base end b ₁ of the bearing projections 4a and 4b of the present embodiment is the base end portion (the vibrator main body 3) of the outer side of each of the bearing projections 4a and 4b in the configuration (ii). The base portions of the bearing projections 4a and 4b).
Each of the bearing protrusions 4a and 4b has a top end s and an outer surface 8 outside the top portion s, and an upper outer surface 82 including the top portion s outer surface is formed in a convex curved shape in the vibrator width direction, and a base end The lower outer surface 83 including the vicinity of the portion b ₁ and the outer surface on the upper side is configured as a concave curved surface in the transducer width direction, and the convex curved surface and the concave curved surface constitute a continuous curved surface in the transducer width direction. Yes. Similar to the embodiment of FIGS. 11 and 12, the entire outer surface 8 including the top s is configured in a curved shape in the vibrator width direction in this manner, so that stress concentration on the outer surface of the crimped portion during processing is further increased. Effectively suppressed. Further, by forming the lower outer surface 83 including the outer surface in the vicinity of the base end portion b ₁ in a concave curved shape in the vibrator width direction, it is possible to appropriately prevent the occurrence of cracks in the vicinity of the base end portion b ₁ .
Since other configurations are the same as those of the embodiment of FIGS. 11 and 12, the same reference numerals are given and detailed description thereof is omitted. Therefore, preferable conditions for the vibrator are the same as those in the embodiment of FIGS.

15 to 18 are front views showing other embodiments of the vibrator applied to the apparatus of the present invention.
FIG. 15 shows an example in which the ratio H / W of the height H to the width W of the bearing projections 4a and 4b is smaller than that of the vibrator shown in FIGS. On the other hand, FIG. 16 is an example in which the ratio H / W between the height H and the width W of the bearing projections 4a and 4b is made larger than that of the vibrator of FIG. 13 (where H ≦ W).
The vibrator applied to the apparatus of the present invention can have any shape of the vibrator body 3 and can take an appropriate shape such as a fan having a cross section as shown in FIGS.

In the embodiment of the vibrator shown in FIG. 17, each of the bearing protrusions 4a and 4b has the above-described configuration (i), as in the embodiments of FIGS. As described above, on the base end portion b (the base portion of each of the bearing projections 4a and 4b with respect to the vibrator body 3) and the virtual horizontal line X on the outer side of each of the bearing projections 4a and 4b in the configuration of (i) above. The virtual outer surface side base end b ₁ is different.
Also in this embodiment, as shown in the figure, a virtual center line Y (virtual center line that bisects the cross section in the transducer width direction bilaterally) and a virtual horizontal line X (axis of the motor rotation shaft arranged in the groove) (Virtual horizontal line passing through the center position p and orthogonal to the virtual center line Y) is uniquely determined, so that the outer surface side base end b ₁ and the inner surface of the bearing projections 4a and 4b according to the above-described definition The position of the side base end b ₂ , the range of the height H and width W of the bearing projections 4 a and 4 b, the position of the virtual ellipse E, etc. are also uniquely determined.

Further, in the embodiment of the vibrator shown in FIG. 18, each of the bearing protrusions 4 a and 4 b has a base end as in the configuration of (i) and (ii) which is the above-described form (b) and specific examples thereof. There is no portion (the base of each bearing projection 4a, 4b with respect to the vibrator body 3). That is, the upper outer surface 85 including the outer surface of the apex s of each of the bearing projections 4a and 4b and the outer surface 8 on the outer side thereof is configured to have a convex curved surface in the vibrator width direction, and the lower outer surface 86. Is configured to be a flat surface or a convex curved surface that is continuous (continuously flush) with the side surface 31 of the vibrator body 3.
Even with the above-described structure, stress concentration on the outer surface of the crimped portion during processing is more effectively suppressed. The bearing projection 4a as mentioned above, the base end portion b ₁ near the 4b is easy to occur especially cracks, but bearing projection 4a as in the present embodiment, the base end portion itself of 4b By eliminating, it is possible to appropriately prevent the occurrence of such cracks.

Also in this embodiment, as shown in the figure, a virtual center line Y (virtual center line that bisects the cross section in the transducer width direction bilaterally) and a virtual horizontal line X (axis of the motor rotation shaft arranged in the groove) (Virtual horizontal line passing through the center position p and orthogonal to the virtual center line Y) is uniquely determined, so that the outer surface side base end b ₁ and the inner surface of the bearing projections 4a and 4b according to the above-described definition The position of the side base end b ₂ , the range of the height H and width W of the bearing projections 4 a and 4 b, the position of the virtual ellipse E, etc. are also uniquely determined.
In addition, in the embodiment of FIGS. 15 to 18, other configurations are the same as those of the embodiment of FIGS. 11 and 12, and therefore, the same reference numerals are given and detailed description is omitted. Therefore, preferable conditions for the vibrator are the same as those in the embodiment of FIGS.

The vibrator applied to the apparatus of the present invention can take various forms other than the above-described embodiments. For example, the cross-sectional shape of the bottom portion of the groove portion 5 is particularly preferably an arc shape corresponding to the cross section of the motor rotating shaft 1, but is not limited to this, and can be an arbitrary shape. Further, the inner walls of the groove 5 and the bearing projections 4a and 4b are not necessarily vertical, and may be inclined so that the groove width increases or decreases toward the lower part of the groove. Accordingly, the groove 5 may be tapered so that the rotary shaft 1 can be inserted only from the axial direction. However, in terms of ease of attaching the rotary shaft, the rotary shaft is inserted into the groove portion 5 from above the groove. It is preferable to have such a width that it can be inserted therein.
In addition, from the viewpoint of bonding strength, the bearing protrusions 4a and 4b are particularly preferably provided over the entire length of the vibrator. However, the invention is not limited to this, and the bearing protrusions 4a and 4b may be provided only in a part of the longitudinal direction of the vibrator. . For example, a configuration in which the bearing protrusions 4a and 4b are provided only in a predetermined range in the central portion of the transducer longitudinal direction, a configuration in which the bearing projections 4a and 4b are provided only in a predetermined range at both ends in the transducer longitudinal direction, and a range of about one half in the transducer longitudinal direction Although the form etc. which are provided only in can be illustrated, it is not limited to these.
The material of the vibrator 2 and preferable chemical component conditions are as described above with respect to the vibration generator.

Each of the bearing projections 4a and 4b of the vibrator applied to the device of the present invention has at least the top part and the upper outer surface of the outer side part formed in a convex curved surface shape in the vibrator width direction. The upper outer surface configured in a curved surface has a height range h ₁ (h ₁ > H) exceeding 1/3 of the height H of the bearing protrusion as shown in FIG. 19 (1). / 3). The upper outer surface of the above-mentioned range of each bearing projection 4a, 4b is a portion that undergoes particularly large plastic deformation when the bearing projection is caulked, and this portion is configured in a convex curved shape in the vibrator width direction, And, as will be described later, by using a caulking tool having a concave curved machining surface (work surface) so that it can be caulked with a convex curved surface, stress on the part or its vicinity during machining Concentration is suppressed and occurrence of cracks can be prevented appropriately.
The upper surface of the convex curved surface only needs to be configured according to the various conditions as described above. Therefore, there is no particular limitation on the radius of curvature R of the convex curved surface of the upper outer surface, but generally 0.2-1 It is appropriate that the radius of curvature is about 0.7 mm, preferably about 0.3 to 1.5 mm. The radius of curvature R of the convex curved surface may change continuously in the vibrator width direction.
The radius of curvature R of the convex surface of the upper outer surface preferably satisfies R / r = 0.4 to 6.8 in relation to the radius r of the radial cross section of the motor rotating shaft 1.

Further, the configuration of (b), which is a preferable mode of each of the bearing projections 4a, 4b, and the configurations (i) and (ii), which are specific examples thereof, are as follows.
In the form of (b) described above, the top outer surface including the top outer surface of the tops of the bearing protrusions 4a and 4b and the outer surfaces outside the bearings 4a and 4b is formed in a convex curved shape in the vibrator width direction. In addition, the lower outer surface including the outer surface of the base end portion of the bearing projection is configured as a concave curved surface in the vibrator width direction, but the upper outer surface configured as a convex curved surface is the same as in FIG. 19 (1). When the height H of the bearing projection is used as a reference, the height range h ₁ (h ₁ > H / 3) is preferably more than 1/3. Therefore, it is preferable that the concave outer curved lower outer surface has a height range less than 2/3 of the height H of the bearing projection.

The upper surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration (b) may be configured according to the various conditions as described above, and therefore the curvature radius R of the convex curved surface and the concave curved surface is special. In general, however, the convex surface of the upper outer surface is 0.2 to 1.7 mm, preferably 0.3 to 1.5 mm, and the concave surface of the lower outer surface is 0.2 to 1.4 mm, preferably Is appropriately set to a curvature radius of about 0.3 to 1.2 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the radius of curvature R of the convex surface of the upper outer surface is about R / r = 0.4 to 6.8, and the concave surface of the concave surface of the lower outer surface. It is preferable that the curvature radius R satisfies R / r = about 0.4 to 5.6, respectively.

In the configuration of (i), which is a specific example of the form (b), the vicinity of the base end portion of the bearing projection is excluded from the top of the bearing projections 4a and 4b and the outer surface of the outer side. The upper outer surface is configured in a convex curved shape in the transducer width direction, and the lower outer surface near the base end is configured in a concave curved shape in the transducer width direction. , when relative to the height H of the projection for the bearing, as shown in FIG. 19 (2), it is preferable that the two-thirds or more height range _{h 2 (h 2 ≧ 2H /} 3). Therefore, it is preferable that the lower outer surface configured in a concave curved surface has a height range h ₃ (h ₃ ≦ H / 3) that is 1/3 or less of the height H of the bearing projection.

The upper surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration of (i) may be configured according to the various conditions as described above. Therefore, the curvature radius R of the convex curved surface and the concave curved surface is special. In general, the convex surface of the upper outer surface is 0.9 to 1.7 mm, preferably about 1.1 to 1.5 mm, and the concave surface of the lower outer surface is 0.2 to 0.5 mm. The curvature radius is preferably about 0.3 to 0.4 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the curvature radius R of the convex surface of the upper outer surface is about R / r = 1.8 to 6.8, and the concave curved surface of the lower outer surface is about. It is preferable that the radius of curvature R satisfies R / r = about 0.4 to 2, respectively.

Further, in the configuration of (ii) described above, the top outer surface including the top outer surface of the top portions of the bearing projections 4a and 4b and the outer surface outside thereof is a convex curved surface in the vibrator width direction. In addition, the lower outer surface including the vicinity of the base end of the bearing projection and the outer surface on the upper side is configured as a concave curved surface in the vibrator width direction, but is configured as a convex curved surface. As shown in FIG. 19 (3), the upper outer surface has a height range h ₄ (h ₄ > H / 3) exceeding 1/3 of the height H of the bearing projection. It is preferable. Therefore, it is preferable that the lower outer surface configured in a concave curved surface has a height range h ₅ (h ₅ <2H / 3) that is less than 2/3 of the height H of the bearing projection.

In addition, the upper surface of the convex curved surface and the lower outer surface of the concave curved surface in the configuration of (ii) may be configured in accordance with the various conditions as described above, and accordingly, the radius of curvature of the convex curved surface and the concave curved surface. Although there is no special limitation on R, in general, the convex surface of the upper outer surface is 0.2 to 0.5 mm, preferably about 0.3 to 0.4 mm, and the concave surface of the lower outer surface is 0.6 to 1. It is appropriate that the radius of curvature is about 0.4 mm, preferably about 0.8 to 1.2 mm. Such convex and concave curved surfaces having a radius of curvature R form a curved surface that is continuous in the transducer width direction. The curvature radius R of the convex curved surface and the concave curved surface may continuously change in the transducer width direction.
Further, in relation to the radius r of the radial cross section of the motor rotating shaft 1, the curvature radius R of the convex surface of the upper outer surface is about R / r = 0.4-2, and the curvature radius of the concave surface of the lower outer surface is about R / r = 0.4-2. R preferably satisfies R / r = about 1.2 to 5.6, respectively.
Furthermore, in the embodiment shown in FIG. 18, the upper outer surface 85 configured in a convex curved shape of each of the bearing projections 4 a and 4 b is also high for the same reason as in FIG. 19 (1). When the height H is used as a reference, the height range h ₁ (h ₁ > H / 3) is preferably more than 1/3. Similarly, the radius of curvature R of the upper outer surface 85 is suitably about 0.2 to 1.7 mm, preferably about 0.3 to 1.5 mm.

Next, a preferred embodiment of the method for manufacturing a vibration generator of the present invention will be described.
The manufacturing method of the present invention is a method for manufacturing a vibration generating device including a motor and a vibrator fixed to the rotating shaft of the motor, and is provided between a pair of bearing protrusions protruding from the vibrator body. In a state where the motor rotation shaft is inserted into the groove formed in the shaft, the vibrator is fixed to the motor rotation shaft by restraining the motor rotation shaft by caulking the both bearing projections inward of the groove portion. Is the method.
20A to 20C are explanatory views illustrating an embodiment of a method for manufacturing the vibration generating device illustrated in FIGS. 1 to 3. In the figure, 9 is a caulking tool, and the caulking tool 9 has a machining surface 90 (work surface) configured in a concave curved surface shape in the vibrator width direction. In the caulking tool 9, it is sufficient that the machining surface 90 to be caulked by actually contacting the bearing protrusion of the vibrator is a concave curved surface, and the shape of the other surface portion is arbitrary.

The vibrator 2 used in this manufacturing method is a vibrator in which at least the top part s of each of the bearing protrusions 4a and 4b and the upper outer surface of the outer part are configured in a convex curved shape in the vibrator width direction. More preferably, the vibrator has various conditions as described above.
As shown in FIG. 20A, in the state where the motor rotating shaft 1 is inserted into the groove 5 of the vibrator 2 from above the groove, the two bearing projections 4a and 4b are moved toward the vibrator main body by the caulking tool 9. 20B and 20C, the two bearing projections 4a and 4b are plastically deformed inwardly of the groove portion, so that the both bearing projections 4a and 4b are moved to the motor rotating shaft 1. Clamp against.

  As already described, in this caulking process, the convex curved surfaces of the bearing projections 4a and 4b are obtained in a state where the concave curved machining surface 90 of the caulking tool 9 is close to point contact (line contact in the longitudinal direction of the vibrator). Abutting on the outer surface (upper outer surface), the bearing projections 4a and 4b are compressed and plastically deformed in the groove inner direction. At this time, the bearing protrusions 4a and 4b are caulked with their outer surfaces remaining in a convex curved shape, so that stress concentration on the part and its vicinity during processing is suppressed, and the occurrence of cracks is appropriately prevented. Can do. Further, in this caulking process, since the caulking is performed while the contact point (action point) of the machining surface 90 moves on the upper outer surface of the bearing protrusions 4a and 4b toward the base end part, the bearing protrusion 4a is performed. , 4b can be efficiently deformed in the groove inner direction. Therefore, the bearing protrusions 4a and 4b can be brought into close contact with each other in the circumferential direction of the motor rotating shaft 1 and can be brought into pressure contact with each other, and a high bonding strength between the motor rotating shaft 1 and the vibrator 2 can be obtained.

Furthermore, in the vibrator 2 of the present embodiment, the height H and the width W of the bearing protrusions 4a and 4b defined by (a) and (b) described above satisfy H ≦ W. The shape of the plastic deformation of the bearing projections 4a and 4b during the caulking process is such that the convex outer surface is compressed and crushed rather than being pushed down (bent) by the load of the caulking tool. To deform. That is, it becomes a form of plastic deformation in which the compression mode is more dominant than the bending mode. For this reason, the stress concentration to specific parts, such as a base end part, is eased, and it can perform the caulking process which does not produce a crack etc. easily.
Furthermore, the vibrator 2 according to the present embodiment has the entire outer surface 8 including the tops s of the bearing protrusions 4a and 4b configured in a curved shape in the vibrator width direction. with stress concentration on the outer surface can be more effectively suppressed, the bearing projections 4a, because it constitutes a base end b ₁ near the outer surface of the 4b into concavely curved, the occurrence of cracking at that portion Properly prevented.

  In the manufacturing method of the present invention, the radius of curvature Rt of the machining surface 90 of the caulking tool 9 is the convex curved upper outer surface of the bearing projections 4a and 4b (the convex curved surface that is subjected to machining with the machining surface 90 in direct contact with it). (Rt> Rx) is generally required, and generally Rt / Rx = 1.1 to 1.5 is preferable. From another viewpoint, it is preferable that the form of the vibrator and the caulking tool 9 satisfy the following relationship. That is, the height H and the width W of the bearing projections 4a and 4b satisfy H / W = 0.5 to 1, preferably 0.7 to 0.8 as described above. As shown in FIG. 22, when a circle Q centered on the shaft center p of the motor rotating shaft 1 and having a radius between the shaft center p and the apex s of the bearing projections 4a and 4b is assumed, It is preferable that the radius of curvature Rm of Q and the radius of curvature Rt of the working surface 90 of the crimping tool satisfy Rt> Rm, and particularly desirably satisfy Rt / Rm = 1. By satisfying the above-described configuration, the curvature radius Rt of the machining surface 90 of the caulking tool 9 is substantially equal to the convex curved upper outer surface of the bearing projections 4a and 4b (the machining surface 90 is directly applied). Since the radius of curvature Rx of the convex curved outer surface subjected to machining in contact is larger than the curvature radius Rx, the contact state between the machining surface 90 of the caulking tool 9 and the convex curved outer surfaces of the bearing projections 4a and 4b is surely pointed. It can be in a state close to contact (line contact in the longitudinal direction of the vibrator).

FIGS. 21A to 21C are explanatory views showing an embodiment of a method for manufacturing the vibration generating device shown in FIGS. In the figure, 9 is a caulking tool, and the configuration of the caulking tool 9 is the same as that of the above embodiment.
Also in this embodiment, caulking is performed in the same form as the embodiment of FIGS. 20A to 20C described above, and as a result, the occurrence of cracks in the caulking portion and its vicinity is suppressed, and The bearing protrusions 4a and 4b can be brought into close contact and pressure contact with each other in the circumferential direction of the motor rotating shaft 1, and a high bonding strength between the motor rotating shaft 1 and the vibrator 2 can be obtained.
Also in this embodiment, the preferable relationship between the form of the vibrator described with reference to FIG. 22 and the caulking tool 9 is the same as that in the embodiment of FIG.
The manufacturing method of the present invention can be applied to the manufacture of a vibration generator using the above-described various types of vibrators, thereby stably manufacturing the vibration generator of the present invention as described above. can do.

The perspective view which shows the motor rotating shaft and the vibrator | oscillator fixed to this in one Embodiment of the vibration generator of this invention. 1 is a front view showing a motor rotating shaft and a vibrator fixed to the motor rotating shaft in the embodiment of FIG. Partial enlarged view of the caulking portion shown in FIG. The perspective view which shows the motor rotating shaft and the vibrator | oscillator fixed to this in other embodiment of the vibration generator of this invention. FIG. 4 is a front view showing a motor rotating shaft and a vibrator fixed to the motor rotating shaft in the embodiment of FIG. Partial enlarged view of the caulking portion shown in FIG. The front view which shows the motor rotating shaft and the vibrator | oscillator fixed to this in other embodiment of the vibration generator of this invention. The front view which shows the motor rotating shaft and the vibrator | oscillator fixed to this in other embodiment of the vibration generator of this invention. The front view which shows the motor rotating shaft and the vibrator | oscillator fixed to this in other embodiment of the vibration generator of this invention. Explanatory drawing which shows the preferable range of the outer surface part comprised by convex curved surface shape and concave curved surface shape about the crimping part of the vibrator | oscillator which comprises the vibration generator of this invention. The front view which shows one Embodiment of the vibrator | oscillator applied to the vibration generator of this invention Partial enlarged view of the bearing projection shown in FIG. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The front view which shows other embodiment of the vibrator | oscillator applied to the vibration generator of this invention. The explanatory view which shows the preferable range of the outer surface part comprised by the convex curved surface shape and a concave curved surface shape about the protrusion for bearings of the vibrator applied to the vibration generator of this invention Explanatory drawing which shows one Embodiment of the manufacturing method of the vibration generator of this invention. Explanatory drawing which shows other embodiment of the manufacturing method of the vibration generator of this invention. Explanatory drawing which shows the preferable dimension conditions of the vibrator | oscillator with respect to the curvature of the processed surface of a fastener in the manufacturing method of the vibration generator of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor rotating shaft 2 Vibrator 3 Vibrator body 4a, 4b Bearing protrusion 5 Groove 6a, 6b Clamping part 7 Outer surface 8 Outer surface 9 Clamping tool 30 Flat surface part 31 Side surface 70, 72, 74, 75 Upper outer surface 71, 73 and 76 the lower outer surface 80,82,84,85 upper outer surface 81,83,86 lower outer surface 90 machined surface s, _{s k} top _{b, b k, b 1,} b 2, b k1, b k2 proximal end

Claims (11)

And a vibrator which is fixed to the rotary shaft of the motor and the motor, in a state of inserting the rotary shaft into the groove formed between a pair of bearing projections projecting from the vibrator body, the working surface in contact with both bearing protrusion presses the projection for the dual-bearing to the vibrator body direction by crimping tool configured concavely curved in vibrator width direction groove portion projections for the dual-bearing A vibration generator having a structure in which a vibrator is fixed to a rotation shaft by restraining the rotation shaft by caulking inwardly ,
Each of the caulking portions constituted by the pair of bearing projections has a vibration in which at least the top portion and the upper outer surface of the outer portion thereof are formed in a convex curved shape in the vibrator width direction. Generator.   Of the outer surface of the top part of each caulking part and the outside part thereof, the upper outer surface including the top outer surface is formed in a convex curved shape in the vibrator width direction, and the lower part including the outer surface of the base end part of the caulking part The outer surface is configured as a concave curved surface in the transducer width direction, and the upper surface of the convex curved surface and the lower outer surface of the concave curved surface form a continuous curved surface in the transducer width direction. The vibration generator according to claim 1.   Of the outer surfaces of the top and outer sides of each crimped portion, the upper outer surface including the top outer surface is formed in a convex curved shape in the transducer width direction, and the lower outer surface of the crimped portion is the transducer width. The vibration generating device according to claim 1, wherein the vibration generating device is configured to be a flat surface or a convex curved surface that is continuous with a side surface of the vibrator body in a direction.   The vibration generating device according to any one of claims 1 to 3, wherein a top portion of each caulking portion and upper outer surfaces of both side portions thereof are formed in a convex curved shape in the vibrator width direction.   The tip portions of the two crimping portions are not in contact with each other or are in contact with each other without plastic deformation, and the rotation shaft is in contact with the vibrator in the range of 200 to 360 ° in the circumferential direction. The vibration generator in any one of Claims 1-4. A method of manufacturing a vibration generating device including a motor and a vibrator fixed to the rotation shaft of the motor, wherein the groove is formed in a groove formed between a pair of bearing projections projecting from the vibrator body. In the manufacturing method of fixing the vibrator to the rotating shaft by restraining the rotating shaft by caulking the both bearing protrusions in the groove portion inner direction with the rotating shaft inserted,
Using a vibrator in which at least the top of each bearing projection and the upper outer surface of the outer part of the bearing are configured to have a convex curved surface in the vibrator width direction, the rotation shaft of the motor is placed in the groove of the vibrator. In the inserted state, the both bearing protrusions are pressed toward the vibrator main body by a caulking tool in which the machining surface that comes into contact with the both bearing protrusions is formed in a concave curved shape in the vibrator width direction, A method for manufacturing a vibration generating device, wherein the protrusions for both bearings are caulked against the rotating shaft by plastically deforming the protrusions for the inner side of the grooves. A method of manufacturing a vibration generating device including a motor and a vibrator fixed to the rotation shaft of the motor, wherein the groove is formed in a groove formed between a pair of bearing projections projecting from the vibrator body. In the manufacturing method of fixing the vibrator to the rotating shaft by restraining the rotating shaft by caulking the both bearing protrusions in the groove portion inner direction with the rotating shaft inserted,
At least the top portion of each of the bearing projections and the upper outer surface of the outer side portion thereof are configured in a convex curved shape in the vibrator width direction, and in the cross section of the vibrator width direction, the following (a) and (b) Using a vibrator in which the height H and width W of the bearing protrusion defined satisfy H ≦ W , and the motor rotating shaft is inserted into the groove of the vibrator, the bearing The two bearing projections are pressed toward the transducer body by a caulking tool having a concave curved surface formed in the transducer width direction on the machining surface that comes into contact with the projections, and the both bearing projections are plastic in the groove inner direction. A method for manufacturing a vibration generating device, wherein the projecting portion for both bearings is caulked with respect to the rotating shaft by being deformed.
(a) Height H of the bearing projection: distance between the virtual horizontal line X and the top s of the bearing projection in the imaginary center line Y direction
(b) Width W of the bearing projection: Distance between the outer base side base end b ₁ and the inner side base end b _{2 of the} bearing projection hypothesized on the virtual horizontal line X
However, virtual center line Y: virtual center line that bisects the cross section in the transducer width direction in two directions
Virtual horizontal line X: a virtual horizontal line passing through the axial center position p of the motor rotation shaft arranged in the groove and orthogonal to the virtual center line Y The vibrator has an upper outer surface including the top outer surface of the top of each bearing projection and the outer surface of the outer portion configured in a convex curved shape in the transducer width direction. The lower outer surface including the outer surface of the end is configured as a concave curved surface in the vibrator width direction, and the upper outer surface of the convex curved surface and the lower outer surface of the concave curved surface form a continuous curved surface in the vibrator width direction. The method for manufacturing a vibration generating device according to claim 7, wherein: The vibrator has an upper outer surface including the top outer surface of the top of each bearing projection and the outer surface of the outer portion configured in a convex curved shape in the transducer width direction, and a lower portion of the bearing projection. 8. The method for manufacturing a vibration generating device according to claim 7, wherein the outer surface is configured as a flat surface or a convex curved surface that is continuous with the side surface of the vibrator main body in the vibrator width direction. 10. The vibration generator according to claim 7, wherein a top of each bearing projection and an upper outer surface of both side portions thereof are formed in a convex curved shape in the width direction of the vibrator. Device manufacturing method. In the vibrator cross section in the vibrator width direction, the height H and the width W of each bearing protrusion satisfy H / W = 0.5 to 1, and the top of each bearing protrusion and 11. The method for manufacturing a vibration generating device according to claim 7, wherein an outer surface of the outer portion is located on or inside a virtual ellipse E defined in the following (c).
(c) Virtual ellipse E: base end portion b on the outer surface side of the bearing projection virtually assumed on the virtual horizontal line X ₁ And inner side base end b ₂ A virtual ellipse that has a radius on the ellipse major axis side and that is in contact with the apex s of the bearing projection or the vicinity thereof

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