JPH0221865A - Vibrator - Google Patents

Abstract

PURPOSE:To restrain looseness generated in a connecting portion due to the turning movement of a moving member centering round the central axis by supporting the moving member on a housing main body in such a manner as to freely slide along the central axis without substantially turning on the central axis. CONSTITUTION:A moving member 26 is formed by a rod member rectangular in longitudinal section, and both end portions thereof are supported on a main body member 8 through bearing members 74, 76 in such a manner as to freely slide in the direction of an arrow 64. After that, when a connecting screw 60 is threaded on a connecting rod 62 through the moving member 26 and a spacer 58, the moving member 26 is driven and connected to an electric motor 32 through a driving connecting mechanism 48. Accordingly, even if the moving member 26 is reciprocated at comparatively high speed to generate the turning force, centering round the central axis, such turning force is transmitted to a housing body 4 through bearing members 74, 76, so that the turning force will not be substantially transmitted to a bearing member 56 through the connecting screw 60 and the connecting rod 62.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a vibrator.

BACKGROUND TECHNOLOGY Vibrators have conventionally been widely used to massage the shoulders and the like. An example of this vibrator is the one disclosed in Japanese Utility Model Publication No. 51-21588. Such a known vibrator includes a housing body having a grip, a movable member attached to the housing body so as to be able to reciprocate, a drive source for reciprocating the movable member, and a drive source attached to one end of the movable member. Equipped with a vibrator. When the drive source is energized, the movable member is reciprocated as required, which generates vibrations in the vibrator, and thus a striking force can be obtained by lightly pressing the vibrator against the affected area, such as the shoulder.

However, with conventional vibrators, the vibrator simply moves back and forth, so it is not possible to obtain a relatively deep hitting force, and since no heat is generated, no heating effect on the affected area can be expected at all. There are some disadvantages.

Therefore, in order to eliminate the above-mentioned disadvantages, the present applicant proposed a vibrator as disclosed in the specification and drawings of Japanese Patent Application No. 63-33981.

In such a vibrator, the vibrator is particularly improved, and an elastic playback is movably disposed within a space provided in the vibrator. However, even in the vibrator proposed above, the supporting style of the movable member is substantially the same as that of the conventional one, and therefore, when the number of reciprocations of the movable member, and therefore the frequency of the vibrator, is increased, the movable member is moved around the central axis. A rotational force is generated, and due to this rotational force, so-called play is likely to occur in various connecting parts, and when the above-mentioned play occurs, it becomes a cause of noise.

<Object of the Invention> The present invention has been made in view of the above facts, and its main purpose is to provide a vibrator that can suppress backlash that occurs due to rotation of a moving member about its central axis. It is to be.

<Summary of the Invention> According to the present invention, a housing body, a movable member movably supported by the housing body, a drive source for reciprocating the movable member, and a drive source attached to one end of the movable member. The vibrator is characterized in that the movable member is supported by the housing body so as to be slidable along the central axis without substantially moving about the central axis. A vibrator is provided.

In such a vibrator, the movable member is supported by the housing body so as not to substantially move about its central axis, so even if rotational force is generated in the movable member, the movable member will substantially move. Thus, it is possible to avoid adverse effects caused by the rotation of the moving member.

<Specific Example of the Invention> A specific example of the vibrator according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the illustrated vibrator includes a housing body designated by the number 2. In FIG. This housing body 2
has a main body part 4 having a substantially rectangular parallelepiped shape and a grip part 6 having a substantially cylindrical shape, and the main body part 4 is composed of a main body member 8 and a cover member 10. and side walls 18 provided at both ends of the bottom wall 12 and connecting the end walls 14 and 16.
(only one side is shown in FIG. 2), the inside of which is hollow, and the top surface of which is open.

The cover member 10 also includes an earth wall 20, end walls 22 and 24 provided at both ends of the earth wall 20, and side walls (not shown) provided at both ends of the upper wall 20 and connecting both ends u22 and 24. ), and is removably attached to the upper end of the main body member 8 so as to cover the upper opening of the main body member 8, as will be described later. The main body member 8 and the cover member 10 can be formed from a metal material such as cast iron.

A moving member 26 is attached to the housing body 2 (specifically, the end walls 14 and 16 of the body member 8). One end of this moving member 26 penetrates one end wall 14 and projects to the left in FIG. 1, and a vibrator indicated by the number 28 is screwed to this projecting end. This vibrator 28 may have substantially the same structure as that disclosed in the specification and drawings of Japanese Patent Application No. 63-33981, and the moving member 26 may be made of a metal material such as iron. The details of the support method will be described later.

The grip part 6, which can be formed from a metal material, for example,
Bottom wall 12 of main body member 8 via cylindrical bearing holder 30
installed on. The grip portion 6 is hollow, and an electric motor 32 constituting a drive source is disposed inside the grip portion 6 . The output shaft of the electric motor 32 protrudes from both sides of the motor body 34, and a cooling fan 36 is attached to one output shaft (the output shaft protruding downward in FIG. 1).

The other output shaft (the output shaft projecting upward in FIG. 1) is screwed onto the connecting shaft 38 and fixed by a fixing nut 40. This connecting shaft 38 is connected to a pair of bearing members 42 which are spaced apart in the vertical direction in FIG.
It is rotatably supported by a bearing holder 30 via.

In relation to the electric motor 32, a cooling air introduction hole 44 and a cooling air discharge hole 46 are formed in the grip portion 6.

In a specific example, a plurality of air introduction holes 44 are formed at intervals in the circumferential direction at the lower end portion (outside the area where the cooling fan 36 is arranged) in FIG.
In FIG. 1, a plurality of are formed at the upper end of the grip portion 6 at intervals in the circumferential direction.

The connecting shaft 38 and the movable member 26 are drivingly connected via a driving connecting mechanism indicated by the number 48. The illustrated driving connecting mechanism 48 has a crank member 50. Crank member 5
A connecting screw 54 is attached to one end of the connecting shaft 38 via a bearing member 52, and one end of the connecting screw 54 is attached to a mounting disc portion 38 provided at one end (the upper end in FIG. 1) of the connecting shaft 38.
It is screwed eccentrically to the Further, a bearing member 56 is attached to the other end of the crank member 50. On the other hand, a connecting screw 60 is attached to the moving member 26 passing through the moving member 26 and the spacer 58, and the connecting screw 60 is screwed onto the connecting rod 62, and the lower end of the connecting rod 62 in FIG. It is rotatably supported by the bearing member 56.

In the vibrator having such a configuration, when the electric motor 32 is energized and rotated in a predetermined direction, the moving member 26 is moved through the connecting shaft 38, the crank member 50, and the connecting rod 62.
is reciprocated in the direction not shown by the arrow 64, that is, in the left-right direction in FIG. 1, and thereby the vibrator 28 is also moved together with the moving member 26. Therefore, by pressing the left side of the vibrator 28 in FIG. 1 against the affected area such as the shoulder, an appropriate hitting force can be obtained. Further, when the electric motor 32 rotates, the cooling fan 36 is also rotated in a predetermined direction. In this way, external air is introduced into the grip part 6 from the air introduction hole 44 by the action of the cooling fan 36, and the thus introduced air is distributed between the inner surface of the grip part 6 and the main body part 34 of the electric motor 32. The air flows through the annular space and is exhausted to the outside through the air exhaust hole 46. Therefore, the electric motor 32 is cooled as required by the above-described cooling air flow, and the grip portion 6 is also prevented from becoming high temperature.

Note that when the noise accompanying the operation of the drive coupling mechanism 48 becomes relatively large, as shown in the figure, the inner surface of the main body portion 4 of the housing main body 2 (in particular, the inner surface of both side walls 18 of the main body member 8 and the upper wall 20 of the cover member 10) (inner surface), a soundproofing material 6 such as rubber
It is preferable to arrange 6.

Next, with reference to FIG. 1 as well as FIGS. 2 and 3, the manner in which the moving member 26 is supported will be described.

In the specific example shown, the manner of support at one end of the movable member 26 and the manner of support at the other end are substantially the same, and therefore the manner of support at one end of the movable member 26 will be described in detail below.

Mainly referring to FIG. 2, in the specific example, four circular receiver portions 68 are formed on the outer surface of the end wall 14 (16) of the main body member 8. As shown in FIG. Further, a substantially U-shaped notch 70 is formed at the upper end of the end wall 14 (16), and the notch 70 is formed in a straight line from the upper end of the end wall 14 (16) to approximately the center of the concave portion 68. It extends to The end wall 14 (16) further includes three receivers spaced apart in the circumferential direction on the outer side of the recess 68.
Female screw holes 72 are formed. A bearing member 74 (76) is removably mounted in the recess 68 of the bearing. The bearing member 74 (76) may be a sliding bearing, preferably one that does not require lubricating oil, etc. As such, a well-known material containing carbon can be advantageously used. The bearing member 74 (76) has a large diameter portion 78 and a small diameter portion 80, and a shoulder portion is provided in the middle thereof, and one end of this large diameter portion 78 is connected to the end wall 14 (1).
The receiver 6) is removably received in the four parts 68. A rectangular through support hole 82 is formed in the bearing member 74 (76), passing through the small diameter portion 80 and the large diameter portion 78. The bearing member 74 (76) is secured to the end wall 14 (16) by a bearing cover 84 (86). Bearing cover 84
A circular opening 88 is formed in the center of the bearing member 74 (76) in a manner corresponding to the small diameter portion 80 of the bearing member 74 (76), and the circumferential surface of the opening 88 is provided with a shoulder portion of the bearing member 74 (76). An engaging step is formed (Fig. 1).The outer peripheral edge of the bearing cover 84 (86) is provided with a plurality of protrusions (three in the specific example) at equal intervals in the circumferential direction. 90 are provided, and through holes 92 are formed in these protrusions 90. On the other hand, the moving member 26 has a vertical cross section corresponding to the rectangular through support hole 82 of the bearing member 74 (76). It is composed of a rectangular rod member, one end of which is supported by one bearing member 74, and the other end supported by the other bearing member 76. As shown in FIG. In order to prevent the end from protruding outward, the other bearing cover 86 is formed with a recess of a predetermined depth instead of the through opening, and the end surface of the recess is covered with an end wall.

In such a vibrator, the moving member 26 is supported, for example, as follows. That is, with the cover member 10 removed, both ends of the moving member 26 are positioned within the notches 70 formed in the end walls 14 and 16.

Next, the bearing member 74 is passed through one end of the movable member 26 , and the bearing of the end wall 14 is positioned in the recess 68 , and a bearing cover 84 is installed through the above-mentioned one end, and the stepped portion of the bearing cover 84 is engaged with the shoulder portion of the bearing member 74 . Match. Thereafter, the fixing screw 94 is screwed into the female screw hole 72 of the end wall 14 through the through hole 92 of the bearing cover 84. Thus, one bearing member 74 is securely fixed between the end wall 14 and the bearing cover 84, and one end of the movable member 26 is supported by the bearing member 74 as required. The other bearing member 76 can also be attached in the same manner as described above. That is, the bearing member 76 is positioned in the recess 68 of the end wall 16 through the other end of the moving member 26, and the bearing cover 86 is positioned through the other end of the bearing member 7.
6, and then insert the fixing screw 94 through the through hole 72 of the bearing cover 86 at the end J! Screw into the female screw hole 72 of i16. Thus, both ends of the moving member 26 are slidably supported by the main body member 8 via the bearing members 74 and 76 in the direction shown by the arrow 64.

After that, connect the connecting screw 60 to the moving member 26 and the spacer 5.
8 to the connecting rod 62.

When screwed in this manner, the movable member 26 is drivingly connected to the electric motor 32 via the driving connection mechanism 48 . Further, a vibrator 28 is provided at one end of the movable member 26 that protrudes through the end wall 14.
and then attach the cover member 10 to the upper end of the main body member 8 as required.

When assembled as required, one end of the movable member 26 (a portion with a rectangular longitudinal section) is assembled as shown in FIG. 3.
is supported by one bearing member 74 so as to be slidable in the direction shown by the arrow 64, and the other end (Ml!Ir surface or rectangular portion) is supported by the other bearing member 76 so as to be slidable in the direction shown by the arrow 64. The movement of the moving member 26 about the central axis is reliably prevented by the action of the bearing members 74 and 76. Therefore, even if the movable member 26 is reciprocated at a relatively high speed and rotational force is generated about its central axis, this same force is transmitted to the housing body 4 via the bearing members 74 and 76, and The rotational force is not substantially transmitted to the bearing member 56 via the connecting screw 60 and the connecting rod 62.

Therefore, in the past, so-called backlash occurred particularly at the connecting portion between the connecting rod 62 and the bearing member 56, but in this specific example,
The rotational force does not substantially act on the connection between the connecting rod 62 and the bearing member 56, and it is possible to suppress the occurrence of play in the connection and the generation of noise caused by the play. Incidentally, in order to detach the bearing members 74 and 76, it is sufficient to perform an operation opposite to the above-mentioned operation. As described above, even when the bearing members 74 and 76 become worn, they can be easily replaced with new ones.

In the specific example, the bearing members 74 and 76 are formed integrally, but from the viewpoint of processing etc., they may also be formed as shown in FIG. 4. That is, a rectangular through-support hole 96 that is somewhat larger than the vertical cross-sectional shape of the moving member 26 is formed in the main body of the bearing member 74'(76'), and a rectangular support hole 96 is formed on each inner surface of the through-support hole 96. piece 98 (because the moving member 26 contacts the supporting piece 98, the bearing member 7 in the illustrated embodiment
4 and 76 (preferably made of a carbon-containing non-lubricated material), and may be fixed with an adhesive or the like.

Figures 5-A and 5-B show variations in the way the moving member is supported. In a first modification shown in FIG. 5-A, one end of the moving member 26' has a circular longitudinal section and is supported by a conventional bearing member 102. On the other hand, the other end of the moving member 26' has a rectangular longitudinal section, similar to the specific example shown in FIGS. 1 to 3, and the other end extends along the central axis of the moving member 26' Although it is movable, it is supported by a bearing member 104 so that it cannot substantially move about the central axis. Therefore,
The action of the bearing member 104 reliably prevents the movable member 26' from rotating about the central axis, achieving the same effect as in the specific example described above. Note that in the first modification, one end of the moving member 26' is circular and the other end is rectangular, but on the contrary, one end of the moving member 26' is made rectangular and supported by the bearing member 104, The other end may be made circular and supported by the bearing member 102.

In the second modification shown in FIG. 5-B, the moving member 2
6'' has a circular longitudinal section and is supported by a normal bearing member 106, and the other end also has a circular longitudinal section and is supported by a normal bearing member 108. Moving member 26''
An abbreviated rotation prevention member 110 is further fixed to the other end with an adhesive or the like, and a circular free end of this rotation prevention member 110 is supported by a normal bearing member 112. .

In this second modification as well, the action of the rotation prevention member 110 reliably prevents rotation of the movable member 26'' about the central axis, and the same effects as described above are achieved. In the second modification, a rotation prevention member 110 is provided at the other end of the moving member 26'', but instead of this,
A rotation blocking member 110 may be provided at one end of the moving member 26'' or at both the one end and the other end.

Although one specific example of the vibrator according to the present invention has been described above, the present invention is not limited to this specific example, and various modifications and changes can be made without departing from the scope of the present invention.

For example, in the illustrated example, the vertical cross section of the movable member is rectangular, but the shape is not limited to such a shape, and an appropriate shape that prevents rotation of the movable member about the central axis, for example, It may be pentagonal, hexagonal, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a specific example of a vibrator according to the present invention. 2 is a partially exploded perspective view of the vibrator shown in FIG. 1; FIG. FIG. 3 is a perspective view schematically showing how the movable member is supported in the vibrator of FIG. 1. FIG. 4 is an enlarged perspective view showing a partially exploded bearing member for supporting a moving member. FIG. 5-A is a perspective view schematically showing a first modified example of the supporting style of the moving member. FIG. 5-B is a perspective view schematically showing a second modified example of the supporting style of the moving member. 2... Vibrator 4... Housing body 6... Gripping part 8... Main body member 10... Cover member 26. 26' and 26''... Moving member 28... Vibrator 32. ...Electric motor 48... Drive connection mechanism 74.74', 76.76', 102, 104°10
6 and 112...Bearing members 84 and 86...Bearing cover Fig. 1

Claims (1)

[Claims] 1. A housing body, a movable member movably supported by the housing body, a drive source for reciprocating the movable member, and a vibrator attached to one end of the movable member. A vibrator comprising: a vibrator, characterized in that the movable member is supported by the housing body so as to be slidable along the central axis without substantially moving about the central axis.