JP2628132B2 - Mouth cleaning tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oral cleaning tool, and more particularly to a motor-operated oral cleaning tool for cleaning interdental areas.

[0002]

2. Description of the Related Art At present, cleaning of an interdental area on which plaque which induces dental caries and periodontal disease is apt to deposit is currently performed by a general toothbrush or a manual interdental brush.

[0003]

However, with a toothbrush, the brush does not reach the deep part between teeth and cannot be sufficiently cleaned. On the other hand, in the manual interdental brush, the interdental brush fitted in the interdental portion is simply moved up and down and back and forth. Since the arm and the like are easily fatigued and cannot be used in a fixed manner, there is a problem that the soft tissue is damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the purpose of thorough cleaning irrespective of the form of the interdental space, and the fixed use of the arm and the like without fatigue. An object of the present invention is to provide an oral cleaning tool.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to achieve the above object, and the gist of the present invention is to detachably attach a brush fixing member orthogonal to the shaft member through rotation of a shaft member from an electric drive source. A handpiece-shaped mouth cleaning tool for imparting a combined movement of a twist movement and a vertical movement to an interdental brush, the mouth cleaning tool including a cam means for engaging the shaft member and the brush fixing member. Wherein the cam means is eccentric to the rotation axis of the shaft member and projects from a front end of the member, a ball having a hole into which the pin member is loosely fitted, and accommodating the ball so that it cannot escape. And a groove provided in the brush fixing member.

[0006]

According to the mouth cleaning tool of the present invention, the cam means acts to impart a twist and a vertical movement to the brush fixing member with the rotation of the shaft member rotationally driven from the electric driving source, and is fixed to the brush fixing member. The combined movement of up and down and twist is applied to the interdental brush.

Further, the pin member which is eccentric from the rotation axis by the rotation of the shaft member makes a circular motion about the shaft rotation axis. According to the horizontal and vertical displacements of the pin member with respect to the shaft rotation axis due to this circular motion, the brush fixing member orthogonal to the shaft member and connected to the pin member and the ball accommodated in the groove is formed by the brush of the interdental brush in the horizontal direction. It reciprocates in the circumferential direction around the fixed part and also reciprocates in the vertical direction.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an oral cavity cleaning tool according to the present invention.

FIG. 1 is a front view of the oral cavity cleaning tool I viewed from the side. The mouth cleaning tool I includes a sheath portion 1 serving as a grip portion.
0 and a head part 20 provided at a slight angle from the sheath part 10 at an obtuse angle. The head section 20 includes a head 20a on which the interdental brush 40 is mounted, and the head 20a.
a and a cylindrical body 20b extending from the end portion a to the sheath portion 10.

The sheath 10 accommodates therein an electric motor, a rechargeable battery (not shown), and the like, and a switch 11 for switching the motor is provided at an upper front portion so as to protrude outward. The head section 20 has a mechanism for converting the rotational movement of the motor into a combined movement in the horizontal and vertical directions and applying the combined movement to the interdental brush 40, and this mechanism will be described in more detail below.

FIG. 2 is a schematic sectional view of the head section 20 of the oral cavity cleaning tool I. The head portion 20 is provided with a head housing jacket 21 integrally formed as a casing of the head portion 20a and the body portion 20b, and the drive shaft 24 rotates in the body portion 20b via a cylindrical cover 22 and a metal bearing 23. A spindle 25 is installed in the head 20a and functions as a brush fixing member for removably receiving and fixing the base end 41 of the interdental brush 40 or a collet chuck (not shown) for mounting the brush. You. The front end 24 ′ of the drive shaft 24 is formed in a disk shape with an enlarged diameter, and the pin member 2 is located at a position eccentric from the shaft rotation axis 24 ″ on the front surface of the front end 24 ′.
6 is provided so as to protrude forward. Spindle 25
As shown in the perspective view of FIG. 3, the cylindrical shape has a shape in which the diameter of the column is reduced in two steps from the upper side to the lower side. Brush 4
It becomes a chuck holder for fixing 0 by press-fitting. Note that portions having different diameters on the spindle 25 are specified from above as three portions: an upper portion 25a, an intermediate portion 25b, and a lower portion 25c. Further, the spindle 25 has a hollow shaft 2
A column-shaped gap 28 extending from the upper surface 25 'of the upper section 25a to the vicinity of the lower end of the middle section 25b is formed in parallel with the axial direction of the upper section 25a. It becomes a spindle groove 29 having a wall surface (see FIG. 4) in the vertical direction and appears to the outside.

The ball 30 is accommodated in the spindle groove 29 from the upper surface 25 'through a gap 28, and then the gap 28 in the upper portion 25a of the spindle is closed by a cylindrical cover member 28'. The ball 30 installed in this way is the intermediate part 2
The ball can be slid in the vertical direction in the groove 29 at 5b, and the ball diameter falls within the groove 29 and cannot escape to the outside. The ball 30 has a cylindrical hole 31, and the hole 31 fits with some play in the head housing jacket 21 with the pin member 26 protruding from the front surface of the drive shaft 24. The vertical length of the spindle groove 29 is about 略 of the diameter of the shaft front end 24 ′.
Designed to be about twice the ball diameter. Also, the shaft rotation axis 24 ″ is orthogonal to the center axis 27 ′ of the spindle 25,
Further, the spindle 25 can slide vertically in the jacket 21 and can move in the circumferential direction about the hollow shaft portion 27 as an axis.

In the mouth cleaning tool I having the above-described structure, the proximal end portion 41 of the interdental brush is connected to the spindle hollow shaft portion 27.
And the switch 11 is turned on to operate the motor. The rotation of the motor is transmitted to the drive shaft 24 via a gear (not shown) or the like, and the pin member 26 makes a circular motion by the rotation of the shaft. Along with this circular motion, the spindle 25 which engages with the pin member 26 via the ball 30 in the groove 29 has the hollow shaft 27 as a rotation axis and the shaft rotation axis 24 ″ as the center of displacement in the horizontal direction. In addition to performing a twisting motion as an arc-shaped right and left reciprocating motion, a cover member 2 provided on a spindle upper portion 25a by a ball 30
As the bottom surface of 8 ′ and the bottom surface of the spindle groove 29 are pushed up and down, it also moves up and down. The movement of the spindle 25 will be further described with reference to FIGS.

FIG. 4 is a sectional view taken along the ABCD direction of FIG. 2 (the head housing jacket 21 and the like are omitted). In this figure, the pin member 26 is located at the lowermost end of the front surface of the shaft front end 24 ′,
While being at the same height as the shaft rotation axis 24 "by the circular motion of 0 degrees, the spindle 25 rotates about 45 degrees to one side in the horizontal direction about the hollow shaft 27 (represented by a broken line). By the time the pin member 26 is at its uppermost end by a further 90 degree circular movement, the spindle 25 has returned in the horizontal direction on the shaft rotation axis 24 ". At the same time, the ball 30 moves upward by the pressing of the ball 30 (FIG. 5),
During the next 90-degree circular movement of the pin member 26, the spindle 2
5 rotates about 45 degrees to the other in the horizontal direction and returns downward. Due to the further 90 degree rotation of the pin member 26, the spindle 25 is moved in the horizontal direction by the shaft rotation axis 2.
4 "again (FIG. 2). That is, the pin member 26, the ball 30, and the spindle groove 29 function as cam means for converting the rotational movement of the drive shaft 24 into the twist and vertical movement of the spindle 25. With one rotation of the drive shaft 24, the spindle 25 makes one reciprocation of the twist movement and the up and down movement in the horizontal direction.
Therefore, the spindle 2 by the continuous rotation of the drive shaft 24
In conjunction with the movement of No. 5, the interdental brush 40 can continuously perform a combined twist and up and down movement.

[0015]

As described above, the mouth cleaning tool of the present invention can simultaneously apply up and down and twist movements to the interdental brush by the shaft member, the brush fixing member, and the cam means for engaging these members. Therefore, the interdental brush can be effectively brought into contact with the interdental gap surface of any complicated shape, and the cleaning effect can be greatly enhanced. In particular, the twist movement of the interdental brush can remove the plaque that has entered the subgingival part by scraping it up, so it is possible to push the removed plaque into the periodontal pocket like a conventional manual interdental brush Absent.

Also, since it is electrically operated, it can be used continuously without fatigue of the arms and the like, and can be used fixedly by applying the tip of the tool body to teeth and the like. Absent. Therefore, the present invention can be easily used even for elderly people who have a remarkable change in the oral environment such as gingival regression, and are particularly effective for oral hygiene in today's aging society.

[Brief description of the drawings]

FIG. 1 is a front view of a mouth cleaning tool of the present invention as viewed from the side.

FIG. 2 is a schematic sectional view showing a head unit.

FIG. 3 is a perspective view showing a spindle and a drive shaft.

FIG. 4 is a schematic cross-sectional view seen from above along the ABCD direction of FIG. 2;

FIG. 5 is a schematic sectional view showing a head unit.

[Explanation of symbols]

 I Oral Cleaning Tool 24 Drive Shaft 24 'Front End 24 "Shaft Rotation Axis 25 Spindle 26 Pin Member 27 Hollow Shaft 27' Center Shaft 29 Spindle Groove 30 Ball 31 Hole 40 Interdental Brush 41 Base End

Claims (1)

(57) [Claims] 1. A handpiece-shaped member for imparting a combined movement of a twist movement and a vertical movement to an interdental brush detachably mounted on a brush fixing member orthogonal to the shaft member through rotation of a shaft member from an electric drive source. An oral cleaning tool, wherein the oral cleaning tool includes cam means for engaging the shaft member and the brush fixing member, and the cam means is eccentric with respect to a rotation axis of the shaft member and a front end of the member. A mouth cleaning tool comprising: a pin member protruding from a portion; a ball having a hole into which the pin member is loosely fitted; and a groove provided in the brush fixing member for accommodating the ball so that the ball cannot escape.