JPS6244481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to vibrating instruments such as polishers, electric brushes, and electric pine surgers.

Conventionally, there have been devices in which the attachment is removably attached to the device body by providing a concave-convex fitting means on the attachment and the device body and press-fitting the attachment into the device body (for example, Utility Model No.
No. 39677). However, there is a drawback that the attachment rotates or detaches from the instrument body during use.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vibrating instrument that can be easily attached and detached and that can be securely attached.

The policy of one embodiment of this invention is shown in FIGS. 1 to 14. That is, as shown in FIG. 1, this polisher has a pistol shape, and a cord 3 is introduced from the rear end of the handle 1 through a bush 2.
A switch 4 is provided on the finger surface of the intermediate portion, and a brush attachment 6 is attached to the front end of the main body 5 to generate circular motion vibration. Circular motion of a brush differs from rotational motion in that each bristle moves in its own circular motion, so the bristles wear out evenly, whereas in rotary motion the periphery, where the circumferential speed is high, wears out first. Therefore, it has the advantage of being more efficient in using the brush. In addition, when the brush surface 7 is used with an inclination to the cleaning surface 8 (surface to be rubbed), the center line of circular motion of the brush attachment 6 is tilted with respect to the cleaning surface 8. The cleaning effect can be enhanced by adding the effect of scraping away dirt in step 8, but the handle 1 and main body 5
If the intersection angle θ of the joints is made obtuse, the handle 1 changes from a downwardly tilted position that is easy to handle to a horizontal position, which not only makes the handle easier to operate and is convenient to use, but also increases the force applied to the brush attachment 6. It becomes easier to concentrate. In particular, when the base of the handle 1 is brought closer to the front end of the main body 5, the cleaning surface 8
The pressing force against becomes effective. As shown in FIGS. 2 and 3, the handle 1 and the main body 5 are integrally molded with a housing 10 having a parting line 9 in the vertical direction, and the parting line 9 is fitted into each other by an integrally molded uneven part 11a. At the same time, it is fixed with screws through the connecting hole 11b.
This housing 10 also includes a front end 1 of the main body 5.
2. Switch part 13 and rear end part 1 of handle 1
A brush attachment 6, a switch 4, and a bush 2 are located in each hole.

Circular motion generating mechanism 1 built into housing 10
5, as shown in FIG. 2, one end of a joint shaft coil spring 18 forming a universal joint by forming a thread on the rotary drive shaft 17 of the motor 16 is screwed in the same direction as the rotational direction, and the joint shaft The other end of the coil spring 18 is similarly screwed and connected to the rear end of the rotating shaft 19,
The tip of the rotating shaft 19 is also threaded so that the eccentric weight 20
is tightened and fixed in the same direction as the rotating direction with a nut 22 via washers 21, 21', and the rotation of the rotation drive shaft 17 is transmitted to the rotation shaft 19 via the joint shaft coil spring 18, and the eccentric weight 20 By rotating and moving its center of gravity in a circular motion, a centrifugal force is generated to elastically bend the coupling shaft coil spring 18,
The rotary shaft 19 is caused to rotate and generate circular motion, and at the same time, the screw connection structure in the same direction as the rotation direction is used to simplify assembly and prevent loosening. Rotating axis 1
9 is formed with a pair of flanges 23, 23', and the inner parts of the ball bearings 24, 25 are press-fitted and fixed into the opposite sides of the flanges 23, 23', and the ball bearings 24, 25 are fixed in the bearing cylindrical hole 27 of the bearing stand 26. Only the circular motion of the rotating shaft 19 is transmitted to the bearing holder 26 by inserting the shaft with a loose fit. A wave washer 28 is installed at the bottom of the bearing cylindrical hole 27 in which the hole 27a is formed, and the ball bearing 24 is installed.
The ball bearing 24 is clamped between the wave washer 28 and the collar 23, and the retaining plate 29 is brought into contact with the end surface of the bearing stand 26, so that the ball bearing 25 is held in elastic contact with the retaining plate 29 and the collar 23'.
The holding plate 29 supports the eccentric weight 20 and resists the thrust load of the rotating shaft 19, and also prevents the ball bearings 24 and 25 from rotating, thereby preventing noise and increasing the service life. By screwing and fixing the drive cover 30, which constitutes a mounting cylinder part on which the brush attachment 6 is attached to the screw 30a on the large diameter side of the bearing stand 26, in the same direction as the rotational direction of the drive shaft 17, the bearing The ball bearing 2 is pressed against the end surface of the stand 26.
4 and 25 from loosening, simplifying installation, and reducing the number of parts.

Since the bearing pedestal 26 supports the rotating shaft 19 in a cantilever manner with respect to the eccentric weight 20 in this way, the bearing pedestal 26
The assembly is easier, the number of parts can be reduced, the size and weight can be reduced, and the design is easier than in the case where a frame is constructed, an eccentric weight 20 is attached inside the frame, and this is supported on both sides. .

Further, as shown in FIG. 6, the motor 16 has a connecting fitting 31 having a cylindrical shape with different diameters attached to the front shoulder portion, and an engaging arm 32 with an axial cut line attached to the rear end of the connecting fitting 31. The engaging arm 32 is elastically engaged with the air hole 33 formed in the motor 16 to fix it removably, making it easy to repair, and a thread is formed on the front end side of the connecting fitting 31 to The rear end side of the bearing pedestal supporting coil spring 34 is screwed together (in the same direction as the rotational direction of the drive shaft), and the front end of the bearing pedestal supporting coil spring 34 is screwed and connected to the small diameter side of the bearing pedestal 26, The bearing stand 26 is supported by the motor 16, and its circular movement is controlled by balancing the restoring force of the bearing stand support coil spring 34 and the joint shaft coil spring 18 with the centrifugal force of the eccentric weight 20, thereby regulating the radius of circular movement. At the same time, the spring elasticity causes the motor 16 to
It softens the vibration transmission to. In addition, the connecting fitting 31
As shown in FIG. 7, the connection between the motor 16 and the motor 16 is achieved by forming a hole 35 on the rear end side of the connecting fitting 31, and connecting the connecting portion 36 between the hole 35 and the rear edge with the air hole 3 of the motor 16.
They may be connected by caulking within 3.

The motor 16 and the bearing pedestal 26, which are thus integrated via the bearing pedestal supporting coil spring 34, are further connected to the cover 3 as shown in FIGS. 2 and 8.
7, 38 to be sealed and waterproof to prevent rusting. The cover 37 surrounds the connecting fitting 31 at the front end of the motor 16 and the coil spring 34 for supporting the bearing stand,
A collar 39 is formed at the front end of the drive cover 3.
The cover is press-fitted into the open end 40 of the motor 16 to tightly seal the inside of the drive cover 30, and the rear end is formed with a flange 41 with a circumferential groove 41a formed inside, and the cover surrounds the rear end of the motor 16. A flange 42 is formed at the front end of the flange 38 and tightly fits into the circumferential groove 41a. These covers 37 and 38 are made of an elastic material such as rubber, and the surrounding portion of the coil spring 34 for supporting the bearing pedestal follows the circular motion of the bearing pedestal 26 and restricts the expansion of the radius of circular motion. It is not necessary to interpose a sealing material such as a gasket at the joint of the cover 30, simplifying the assembly, and providing vibration-proofing and noise-absorbing effects that prevent the vibration of the motor 16 from being transmitted to the housing 10. Further, as shown in FIGS. 3 and 4, the motor insertion portion of the cover 37 and the inner surface of the cover 38 are formed with a large number of rib strips 43 parallel to the axial direction of the motor 16, and the motor 16 and the connecting fitting 38 are
The covers 37 and 38 can be easily inserted into the motor 16 by reducing the contact area with the outer surface of the motor 16. At the same time, the gaps 44 formed by the rib strips 43 provide a heat dissipation effect for the heat generated as the motor 16 is driven. ing. The rear end of the cover 38 integrally projects two small cylinders 45 into which a lead wire 46 of the motor 16 is press-fitted and drawn out.

The circular motion generator groove 15 surrounded by the covers 37 and 38 is connected to the motor by the rear end surface 10a of the main body 5 in the housing 10 and the axial positioning ribs 10b and 10c as shown in FIGS. 2, 3 and 9. The drive cover 30 is fixed in the axial direction by sandwiching the front and rear ends of the drive cover 16 and the flange 41 of the cover 37, and the drive cover 30 is positioned in the opening of the front end 12 of the main body 5 of the housing 10. The peripheral surface of the cover 38 is in contact with the semicircular rib 47 (Fig. 3), and a locking protrusion 48 is integrally molded on the cover 38 (Fig. 9), and a semicircular fixing band 49 is attached to this surface. A cut-and-raised locking piece 50 formed on one end of the housing 10 is brought into contact with the housing 10.
The protrusion 48 is located in the recess 51 formed by the undercut.
The other end is held against the boss 52 protruding into the housing 10 and fixed by screwing in the tapping screw 53, so that it can be easily assembled with a single screw. In addition, a semicircular rib 47 and a semicircular fixing band 49
The cover 38 is fastened to the body 5 of the housing 10, and thereby the conical movement (slot-like movement) of the motor 16 caused by the circular movement of the bearing pedestal 26 is absorbed by the body fastening portion as a joint. motor 16
This prevents stress from being applied to the housing 10 and prevents the reaction from being transmitted to the housing 10 (within the width of the band 49 due to the elastic action of the cover 38).

On the other hand, the switch 4 that controls the power supply to the motor 16 is a seesaw type switch as shown in FIGS. U-shaped rib 57 protruding from the handle 1 of the
a and 57b, the cover 54 protrudes from the opening of the handle 1 so that the switch 4 can be operated through the cover 54, and the cover 55 has a lead wire insertion tube 58 formed at the end to allow the lead wire to be inserted. One lead wire 59 of the power cord is inserted into the remainder of the insertion tube 58, and the insertion part is covered with a waterproof tube 60a. The remaining lead wire 59 is connected with a crimp connection fitting 61 and covered with a waterproof tube 60b. Two lead wires 59 of the power cord are connected to the outside via the bush 2. Lead wire 59 leading to this bushing 2
The lead wire 46 is restricted from moving by a positioning rib 62 projecting from the housing 10 midway. Further, the bush 2 has a hanging ring 3a integrally formed thereon and protrudes from the rear end of the handle 1, making it possible to store the polisher by hanging.

Next, the brush attachment 6 is detachably attached to a drive cover 30 protruding from the front end of the main body 5 (FIG. 2). Therefore, as shown in FIGS. 10 and 11, from the front end of the circumferential surface of the drive cover 30, a large number of anti-rotation protrusions 63 are provided at regular intervals in the axial direction, and from the rear end are provided for preventing slippage. Circumferential groove 64
On the other hand, a cylindrical portion 66 that fits onto the drive cover 30 is protruded from the rear end surface of the brush stand 65 of the brush attachment 6, as shown in FIGS. It is held by press-fitting into the surface of 63, making press-fitting easier and minimizing variation in holding force against intrusion of foreign substances such as water.
7 is formed to engage with the long groove 63a of the protrusion 63 to prevent rotation, and three locking protrusions 68 are protruded from the inner surface of the end of the cylindrical portion 66 and fit into the circumferential groove 64 by resin elasticity. This causes clicks. The brush stand 65 can be fitted to the drive cover 30 by shifting the brush stand 65 at an arbitrary position in the rotational direction by 15 degrees to 30 degrees, which corresponds to the interval between the long grooves 63a. Further, the drive cover 30 described above has a screw 30b screwed into the bearing stand 26 formed on its inner surface, but an inner step 69 is formed in order to make the amount of screwing constant. The drive cover 30 is formed by forming the drive cover 30 with the inner stage 69 as a border.
By eliminating the difference in wall thickness between the front end and rear end of the mold, it is possible to prevent sink marks during molding due to uneven wall thickness. On the other hand, on both sides of the protrusion 68 on the cylindrical portion 66 of the brush stand 65, there are grooves 70 in the axial direction that reduce the wall thickness of the cylindrical portion 66.
By forming a notch in the axial direction, fatigue of the cylindrical portion 66 due to repeated attachment and detachment of the brush attachment 6 is prevented, and the click effect of the projection 68 is increased, compared to the case where a notch is formed in the axial direction. A cover 71 for preventing intrusion of foreign matter such as water is embedded in the front end 12 of the main body 5 of the housing 10, and the opening 72 thereof is folded back forward to form a water return.

As described above, the vibrating instrument of the present invention has a plurality of elongated grooves extending in the axial direction and formed in the circumferential direction for preventing rotation, and a circumferential groove for preventing slippage formed over the entire circumference in the circumferential direction. an instrument body having a cylindrical attachment portion on an outer circumferential surface; a cylindrical portion that fits on the outer circumferential surface of the cylindrical attachment portion; and a protrusion that engages with the long groove on the inner surface of the cylindrical portion; At the same time, the attachment includes a locking protrusion that engages with the circumferential groove and a concave groove that imparts elasticity to the locking protrusion in the vicinity of the locking protrusion, thereby providing the following effects.

That is, since the protrusion is engaged with the long groove for preventing rotation and the locking protrusion is locked with the circumferential groove, rotation and detachment of the attachment can be prevented and the attached state can be ensured. Furthermore, since multiple long grooves are formed in the circumferential direction, the contact area between the cylindrical part of the attachment and the cylindrical part for mounting can be reduced, making attachment and detachment easier and minimizing variations in holding force against intrusion of foreign substances such as water. In addition, since the number of long grooves is plural and the circumferential groove is formed all around the circumference, attachments can be attached from any direction, making it easy to use. Furthermore, since the grooves impart elasticity to the locking protrusion, fatigue of the locking protrusion due to repeated attachment and detachment of the attachment can be prevented and the click effect can be increased.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is an enlarged sectional view thereof, FIG. 3 is a sectional view taken along the line of FIG. 2, FIG. 4 is a partial sectional view of the motor portion, and FIG. Figure 2 - Line sectional view, Figures 6 and 7 are exploded perspective views of the motor section, Figure 8 is an exploded perspective view of the cover, Figure 9 is a perspective view of the cover with the fixing band attached, and Figure 9 is a perspective view of the cover with the fixing band attached. Fig. 10 is a half-sectional view of the drive cover, Fig. 11 is a right side view thereof, Fig. 12 is a half sectional view of the brush stand, Fig. 13 is a left side view thereof, and Fig. 14 is a sectional view taken along the - line. . 5...Main body, 6...Brush attachment, 3
0... Drive cover that constitutes the mounting cylinder part, 63a
... Long groove, 64 ... Circumferential groove, 66 ... Cylinder part, 67 ...
...Protrusion, 68...Locking protrusion, 70...Concave line.

Claims (1)

[Claims] 1. Having a cylindrical mounting portion that has a plurality of long grooves for rotation prevention extending in the axial direction and formed in the circumferential direction and circumferential grooves for preventing removal formed over the entire circumference on the outer peripheral surface. an instrument body; a cylindrical portion that fits into the outer circumferential surface of the mounting cylindrical portion; a protrusion that engages with the long groove on the inner surface of the cylindrical portion; and a locking protrusion that engages with the circumferential groove; and an attachment having a concave groove near the locking projection that imparts elasticity to the locking projection.