JP2004344561A - Portable polishing device for tooth surface or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a body and bearings from wearing by an abradant oozing into a gap between a polishing rotor and the body in a portable polishing device for the tooth surface or the like. <P>SOLUTION: The portable polishing device 1 for the tooth surface or the like has a gripping part having a housing containing a battery and a motor, a head arm 8 attachably and detachably mounted on this gripping part, and the polishing rotor 24 at the forward end part of the head arm 8. A vane 89 placed in the gap G between the body 2 and the polishing rotor 24 is formed in the polishing rotor 24. Since the abradant is blown away by an air current (wind) caused by rotation of this vane 89 at the time of polishing, wearing of the body 2 and the bearings of the polishing rotor 24 by the abradant oozing into between the polishing rotor 24 and the body is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable tooth surface or the like polisher that removes deposits and deposits such as tobacco and the like attached to the tooth surface by polishing, and grinds and polishes a nail surface, and in particular, attaches to a polisher body. The present invention relates to a portable tooth surface and the like polishing machine having a polishing rotor at the tip of a head arm to be used.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of portable tooth polisher or the like, a portable tooth flank cleaning polisher having a polisher body incorporating a motor, a battery, and a driving gear driven by the motor is known. (For example, Patent Document 1, FIG. 2) In this polishing machine, a polishing tip (polishing rotor) is mounted in a polishing machine main body via a driving gear.
[0003]
As another conventional technique, there is known a portable tooth surface nail surface cleaning / polishing machine in which a head arm is detachably attached to a main body containing a battery, a motor, and a rotation output unit. (For example, Patent Document 2, FIG. 1) Also in this polishing machine, the polishing rotor is attached to the main body via a drive gear.
[0004]
[Patent Document 1]
JP-A-2000-350736 (FIG. 2)
[0005]
[Patent Document 2]
JP-A-2002-102254 (FIG. 1)
[0006]
[Problems to be solved by the invention]
In both Patent Literature 1 and Patent Literature 2, the polishing rotor is attached to the main body in a state where there is a slight gap between the main body side end surface of the polishing rotor and the main body. This is to prevent friction between the polishing rotor and the main body when the polishing rotor rotates. When using a polisher, a gel-like abrasive is usually applied to a polishing rotor, and the tooth surface is polished by the abrasive. However, when the abrasive enters the gap, the main body and the bearing portion that supports the rotating shaft of the polishing rotor are worn, and there is a possibility that the parts are consumed.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide a polishing machine in which abrasion of a main body and a bearing by a polishing rotor hardly occurs.
[0008]
[Means for Solving the Problems]
The portable tooth polisher and the like of the present invention is provided with a motor driven by a built-in battery, a main body housing a rotation mechanism driven by the motor, and detachably mounted on the main body via the rotation mechanism. A polishing rotor for polishing a body to be polished by adhering an abrasive to the polishing rotor, wherein the polishing rotor has an end face on a main body side, and the end face has an end face and a main body. And a blade for preventing the abrasive from entering during use.
[0009]
The blades may be composed of a plurality of ribs extending radially outward about the rotation axis of the polishing rotor. Here, "extend radially outward" means not only those that extend linearly outward from the center of the circle, but also those that extend while curving or that extend while changing the thickness and height. Including.
[0010]
Further, the polishing rotor may be formed of an elastic member, and the blade may be formed integrally with the polishing rotor.
[0011]
The main body includes a head arm to which the polishing rotor is attached, and a grip to which the head arm is removably mounted. A first rotation mechanism having a rotation mechanism disposed in the grip, and a head arm And a second rotation mechanism portion removably engaged with the first rotation mechanism portion, which is disposed inside the first rotation mechanism portion.
[0012]
【The invention's effect】
In the portable tooth polisher or the like of the present invention, the polishing rotor attached to the main body has an end face on the main body side, and this end face prevents the abrasive from entering the gap between the end face and the main body during use. Since the blade is provided, the abrasive is repelled by the blade itself and an air current (wind) generated by the rotation of the blade. This makes it possible to provide a polishing machine in which the main body and the bearing portion are less likely to be worn by the abrasive.
[0013]
When the blades are composed of a plurality of ribs extending radially outward around the rotation axis of the polishing rotor, the size of the gap between the polishing rotor and the main body and the size of the end face of the polishing rotor are different. Even with this, the dimensions of the ribs can be set appropriately to give the effect of eliminating the abrasive.
[0014]
Further, when the polishing rotor is formed of an elastic member and the blades are formed integrally with the polishing rotor, the polishing rotor can be easily manufactured at low cost.
[0015]
Further, the main body includes a head arm and a grip portion to which the head arm is detachably mounted, and the rotation mechanism portion includes a first rotation mechanism portion in the grip portion and a second rotation mechanism in the head arm. In the case where the polishing rotor is constituted, the head arm can be removed to easily clean the polishing rotor, so that the polishing rotor can be kept clean.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a portable polisher or the like (hereinafter simply referred to as a polisher) of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of a polisher equipped with a cap. FIG. 2 is a side view of the polishing machine of FIG. First, a description will be given with reference to FIGS.
[0017]
The polisher 1 has a main body 2 and a transparent resin cap 4 attached to the main body 2. 1 and 2 show only the outline of the outer shape, and the thickness is omitted. The main body 2 is composed of a grip portion made of a synthetic resin housing 5 and a synthetic resin handle, that is, a head arm 8 which is detachably attached to the grip portion. The housing 5 includes a cylindrical tubular portion 3 and a mounting seat 20 attached to the upper portion of the tubular portion 3 by latching. The details of the latch engagement will be described later.
[0018]
The mounting seat 20 has a generally frustoconical shape in which the upper part is narrowed, and the above-described head arm 8 is mounted on the upper part of the mounting seat 20. A non-slip projection 10 and a pressing portion 12 are integrally molded on the front surface of the tubular portion 3, and a non-slip portion 14 made of elastic synthetic resin is overmolded and formed as a part of the housing 5. I have. Since the slip portion 14 has elasticity, the pressing portion 12 can be pressed by a finger from the outside. At the lower end of the tubular portion 3, a lid 18 for holding a battery 16 (FIG. 3) is screwed and attached to the tubular portion 3.
[0019]
The head arm 8 is attached such that the axis 91 of the head arm 8 is inclined with respect to the axis 90 of the gripping portion. The details of this mounting mode will be described later. Although the head arm 8 shown in FIGS. 1 and 2 shows one mounting position, it can be mounted in the opposite direction. The mounting in the opposite direction will be described later. A polishing rotor (polishing chip) 24 is detachably attached to the tip of the head arm 8.
[0020]
As shown in FIGS. 1 and 2, the cap 4 can be attached to the upper end of the tubular portion 3 with the head arm 8 attached to the housing 5. At this time, the cap 4 does not contact the polishing rotor 24 attached to the head arm 8. Therefore, it is not necessary to remove the head arm 8 for storage after completion of the polishing operation and store it in another place, so that the polishing machine 1 can be kept hygienic.
[0021]
Next, the polishing machine 1 will be described in more detail with reference to FIG. FIG. 3 is a sectional view taken along line 3-3 of the polishing machine 1 of FIG. The inside of the cylindrical portion 3 is a substantially cylindrical cavity 26, and a case 28 is accommodated in the cavity 26. The case 28 has two halves, each of which forms a half of a substantially cylindrical shape. The battery 16, between one half 27 of the case 28 and the other half (not shown), A motor 30, a switch 32, and a rotation mechanism (first rotation mechanism) 34 are accommodated, and these components are positioned and fixed in the case 28. FIG. 3 shows only one half 27.
[0022]
In order to insert the case 28 into the tubular portion 3, the cover 18 screwed to the tubular portion 3 is removed and inserted from the lower end of the tubular portion 3, and then the cover 18 is attached to the tubular portion 3. . Then, the upper end of the case 28 is screwed to the partition 38 above the tubular portion 3 by a screw (not shown), and the case 28 is fixed in the tubular portion 3. The above-described switch 32 is located immediately behind the pressing portion 12 and is configured to operate according to the operation of the pressing portion 12. The electric wires (electric circuits) connecting the switch 32 and the battery 30 are omitted in FIG. A sealing member 36 having elasticity is attached to the tip of the cylindrical portion 3, that is, the upper end in FIG. The sealing member 36 is fixed together with the case 28 to the opening 38a of the partition wall 38 at the upper part of the tubular portion 3 by being screwed together with the above-mentioned screw (not shown).
[0023]
The upper portion of the housing 5 is a mounting seat 20 made of resin as described above, and the head arm 8 is mounted on the mounting seat 20. On the head arm 8, a rotation mechanism 40 (second rotation mechanism) connected to the rotation mechanism 34 is arranged. Hereinafter, the rotation mechanism units 34 and 40 will be described. The description will be made with reference to FIG. FIG. 4 is a partially enlarged cross-sectional view showing only the rotation mechanisms 34 and 40 in an enlarged manner.
[0024]
In FIG. 4, when the rotation shaft (output shaft) 30a of the motor 30 rotates, the gear 42 attached to the rotation shaft 30a rotates, and the rotation is transmitted to the gears 43, 44, 45, 46, and 47 linked therewith. And the rotation of the motor 30 is reduced. The gears 43 and 45 rotate around a shaft (input shaft) 48, and the gears 44 and 46 rotate around a shaft 50. The shaft 48 and the shaft 50 are held between the halves of the case 28. The motor 30 has a rotating shaft 30a arranged parallel to the axis 90 of the gripper 6, and a shaft 48 arranged parallel to the rotating shaft 30a.
[0025]
The gear 47 is fixed to a lower end of a rod (rotation transmission shaft) (output shaft) 52, and when the gear 47 rotates, the rod 52 also rotates. The rod 52 is entirely inclined at a predetermined angle, and its tip has a length protruding upward from the sealing member 36 described above. Since the rod 52 rotates in close contact with the hole 36a of the sealing member 36, entry of moisture, water, and the like downward from the sealing member 36 is prevented. Note that the rod 52 is held between the two halves similarly to the shafts 48 and 50. In each half, grooves are formed at positions aligned with each other to form a hole or a hole in cooperation with each other when the halves are united, and a shaft 30a, 48, 50 and 52 are pivotally supported.
[0026]
The mounting seat 20 has two opposing locations, namely, the non-slip portion 14 side, and an opening 56 (FIGS. 1 and 3) on the opposite side, and engages with the latch 22 provided near the partition 38. Fixed. At the upper end of the mounting seat 20, a receiving hole (receiving portion) 58 inclined upward by a predetermined angle is formed from the upper end to the inside. The insertion portion 60 at the lower end of the head arm 8 is fitted into the receiving hole 58 without looseness. A latch projection 58 a is formed below the receiving hole 58, and an opening 60 a that engages with the latch projection 58 and holds the head arm 8 in the receiving hole 58 is formed in the insertion portion 60. The receiving hole 58 and the insertion portion 60 have a circular cross-sectional shape, and the fitting direction is determined by keying each other.
[0027]
Next, this keying will be described with reference to FIG. FIG. 10 shows a state in which the housing 5 with the head arm 8 removed is viewed from above, and a state in which the removed head arm 8 is viewed from the insertion section 60 side. However, the polishing rotor 24 has been removed from the head arm 8. In the receiving hole 58 of the mounting seat 20, a pair of key grooves 92 extending at a predetermined angle are formed at positions facing each other. This predetermined angle coincides with the axial direction of the head arm 8 when the head arm 8 is attached to the receiving hole 58.
[0028]
On the other hand, a pair of key ribs 94 that engage with the key groove 92 is formed at a position corresponding to the key groove 92 on the outer periphery of the insertion portion 60 of the head arm 8. As a result, the head arm 8 is mounted on the mounting seat 20 at a predetermined angle. Further, since the key groove 92 and the key rib 94 are formed at positions facing each other in a circular shape, the head arm 8 can be mounted with the direction of the head arm 8 reversed by 180 °. That is, as shown in FIG. 7, the head arm 8 can be mounted in a direction opposite to the position shown in FIG. At this time, the polishing rotor 24 is turned in the opposite direction to that in FIGS.
[0029]
Referring again to FIGS. 3 and 4, another rod (rotation transmission shaft) 62 that constitutes the rotation mechanism section 40 is supported in the head arm 8 along the longitudinal direction of the head arm 8. A gear 64 is formed on the upper end of the rod 62, and the gear 64 and the gear 66 mesh substantially at right angles. Since the gear 66 is fixed to the rotating shaft 68 of the polishing rotor 24, when the rod 62 rotates, the rotating shaft 68 rotates accordingly.
[0030]
Next, the engagement between the rod 52 and the rod 62 will be described with reference to FIG. FIG. 5 is an enlarged partial cross-sectional view showing an engagement portion between the rods 52 and 62. As shown in FIG. The tip of the rod 52 is stamped to form a pair of oppositely-facing projections 54 (FIG. 4). Each projection 54 has a plate surface parallel to the longitudinal direction of the rod 52, and the outside is formed in a curved shape.
[0031]
On the other hand, an engagement hole 70 is formed at the lower end of the rod 62, and an engagement groove 72 for receiving the above-described protrusion 54 of the rod 52 is formed on the inner surface of the engagement hole 70. Four are formed at equal intervals along the circumference. A taper 71 is formed at the open end of the engagement groove 72, that is, below the engagement hole 70 in FIG. The taper 71 has a function of guiding the protrusion 54 into the engagement groove 72 when the rod 52 is inserted into the engagement hole 70. As shown in FIG. 10, the taper 71 is formed between the grooves 72 so as to be continuous with the grooves 72 on both sides thereof. Therefore, even if the head arm 8 is replaced, the rods 52 and 62 can easily engage with each other.
[0032]
When the head arm 8 is inserted into the receiving hole 58, the projection 54 enters the engagement groove 72 and engages (locks) with each other in the rotation direction. Thus, the rod 52 of the rotation mechanism 34 and the rod 62 of the rotation mechanism 40 are integrally connected. The engagement groove 72 and the projection 54 are collectively referred to as an engagement portion.
[0033]
Next, the structure of the head arm 8 will be described with reference to FIG. FIG. 6 is a partially enlarged cross-sectional view partially showing a cross section of a tip end portion of the head arm 8 to which the polishing rotor 24 is mounted. The head arm 8 has a space 65 formed from the insertion portion 60 to the distal end thereof, and the rod 62 described above is arranged in the space 65. A rotation shaft 68 is provided. A shaft support 74 that supports the rotation shaft 68 is fixed to the head arm 8 by ultrasonic waves in the opening of the space 65.
[0034]
The shaft support portion 74 has an elastic ring 74a that seals the rotation shaft 68 inside. A spherical recess 76 is formed at one end of the rotating shaft 68, and a spherical projection 78 complementary to the recess 76 is formed on the inner surface of the head arm 8 at a position corresponding to the recess 76. . The rotation shaft 68 is rotatably supported by a shaft support 74 and a projection 78. A screw hole 80 is formed at the other end of the rotating shaft 68. When the polishing rotor 24, to which the polishing rotor 24 is attached, is worn out, the screw hole 80 can be easily removed from the screw hole 80. Can be exchanged.
[0035]
Next, the polishing rotor 24 will be described. The polishing rotor 24 shown in FIG. 6 is an example of a polishing rotor. The polishing rotor 24 has a substantially cylindrical shape molded from elastic rubber, and has a concave portion 82 and a flange 84 and a screw 86 on the opposite side of the concave portion 82. To attach the polishing rotor 24 to the rotation shaft 68, the screw 86 may be screwed into the screw hole 80. At this time, a gap G is formed between the flange 84 and the surface of the shaft support 74. A plurality of radial blades 89 extending into the gap G are formed integrally with the flange 84.
[0036]
The blade 89 includes a plurality of curved ribs 88. The blades 89 generate wind as the polishing rotor 24 rotates, and this wind prevents the abrasive applied to the polishing rotor 24 from entering the gap G. In addition, the abrasive may be directly removed to the outside by the blade 89 without depending on the wind. Each rib 88 may extend linearly, or may extend while changing its thickness and height.
[0037]
Next, the head arm 8 will be described in more detail with reference to FIG. 7 again. FIG. 7 is a side view of the polishing machine 1 of FIG. 1 viewed from the same direction, showing a state in which the head arm 8 shown in FIG. 1 is mounted in reverse. The head arm 8 is mounted on the mounting seat 20 at a predetermined angle as shown in FIGS. In other words, the head arm 8 is inclined at a predetermined angle so that the rotation shaft 68, the axis 91 of the head arm 8, and the axis 90 in the longitudinal direction of the gripper 6 shown in FIG.
[0038]
Therefore, the polishing rotor 24 can be positioned symmetrically with respect to the inclined head arm 8. That is, the polishing rotor 24 faces upward in FIG. 1 and faces downward or inward in FIG. The position shown in FIG. 1 is suitable for, for example, polishing the surface of a tooth (a body to be polished), and the position shown in FIG. 7 is suitable for polishing the back surface of a tooth. Since the head arm 8 is inclined as described above, if there is a portion that is difficult to polish, the head arm 8 can be appropriately replaced to change the head arm 8 to an easy-to-use direction. The inclination angle of the head arm 8 is preferably in the range of 10 ° to 30 ° from the viewpoint of usability.
[0039]
Next, the polishing rotor will be described in more detail with reference to FIGS. FIG. 8 shows a polishing rotor according to another embodiment, and FIG. 9 is an enlarged view of the polishing rotor 102 of FIG. The polishing rotor 102 has a substantially conical shape in which a plurality of irregularities are radially formed on an elastic surface. A screw 106 connected to the rotating shaft 68 is attached to the base 104. A blade 112 formed of a plurality of arc-shaped ribs 110 is integrally formed on an end face 108 of the base 104 facing the shaft support 74.
[0040]
The shape of the rib 110 is formed in a curved shape obliquely outward from the center of the polishing rotor 102 so that an air current (wind) is generated outward when the polishing rotor 102 rotates. The shape of the rib may be a linear shape formed obliquely, in addition to the arc shape. Further, the length of the rib may be shorter than that shown in FIG. In addition, the shape is not limited to these shapes as long as the abrasive can be removed.
[0041]
The rotation direction of the polishing rotor 102 is clockwise (clockwise) in FIG. The ribs 110 have a function of blowing off the abrasive (not shown) which tends to enter the gap G from the periphery of the blades 112 by generating wind by the rotation. Therefore, since the abrasive does not enter the gap G, it is possible to prevent the shaft support 74 and the main body 2 from being worn by the abrasive.
[Brief description of the drawings]
FIG. 1 is a front view of a portable tooth polisher or the like with a cap attached. FIG. 2 is a side view of the portable tooth polisher or the like of FIG. 1. FIG. 3 is a view of the portable tooth polisher of FIG. FIG. 4 is a partial enlarged cross-sectional view showing only the rotation mechanism section. FIG. 5 is a partial cross-sectional view showing an enlarged rod engagement portion of the rotation mechanism section in FIG. 4. FIG. 6 is a partially enlarged cross-sectional view partially showing a cross section of a tip portion of a head arm on which a polishing rotor is mounted. FIG. 7 is a portable tooth surface of FIG. 1 showing a state in which the head arm shown in FIG. FIG. 8 is a side view of the polishing machine viewed from the same direction. FIG. 8 is a view showing a polishing rotor of another embodiment. FIG. 9 is an enlarged view of the polishing rotor of FIG. 8 viewed from an arrow. FIG. FIG. 4 is a diagram showing both a state in which the housing in the opened state is viewed from above and a state in which the removed head arm is viewed from the insertion portion side.
[Explanation of symbols]
DESCRIPTION OF REFERENCE NUMERALS 1 Portable tooth polisher 2 Main body 6 Gripping section 8 Head arm 16 Battery 24, 102 Polishing rotor 30 Motor 34 First rotating mechanism section 40 Second rotating mechanism section 88, 110 Rib 89, 112 Blade 90 Gripping section Axis 108 of end face G gap

Claims (4)

A motor driven by a built-in battery, a main body accommodating a rotating mechanism driven by the motor, and a polishing rotor detachably mounted on the main body via the rotating mechanism. In a portable tooth surface or the like polishing machine for polishing an object to be polished by attaching an abrasive to the rotor,
The portable type, wherein the polishing rotor has an end face on the main body side, and the end face is provided with a blade for preventing the abrasive from entering the gap between the end face and the main body at the time of use. Polisher for tooth surfaces. 2. The portable tooth flap polishing machine according to claim 1, wherein the blades are formed of a plurality of ribs extending radially outward about a rotation axis of the polishing rotor. 3. The portable tooth surface and the like polishing machine according to claim 1, wherein the polishing rotor is formed of an elastic member, and the blade is formed integrally with the polishing rotor. A first rotating mechanism section, wherein the main body includes a head arm to which the polishing rotor is attached, and a grip section to which the head arm is detachably mounted, and wherein the rotating mechanism section is disposed in the grip section; And a second rotation mechanism disposed in the head arm and removably engaged with the first rotation mechanism. 5. 2. The portable tooth surface polishing machine according to claim 1.

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