JP7377403B2 - Anti-slip device for dental handpiece - Google Patents

Description

The present invention relates to a non-slip device that can be attached to the grip of a dental handpiece.

Conventionally, a dental handpiece 50 as shown in FIG. 14 has been known (for example, see FIG. 1 of Patent Document 1).
This dental handpiece 50 is provided with an elastic tube 53 so as to cover the grip portion 51. In particular, the surface of the elastic tube 53 is provided with an uneven pattern (specifically, a mesh pattern) to prevent slipping.

Publication No. 57-107511

The present inventor discovered the following drawbacks regarding the above-mentioned conventional dental handpiece.
In the case of a linear dental handpiece 50 that is provided with an elastic tube 53 and does not appear bent from the grip portion 51 to the head portion 55, the linear dental handpiece 50 is flattened. When placed on a treatment table, even a slight external force applied to the dental handpiece 50 may cause the dental handpiece 50 to roll.
Further, when the elastic tube 53 has a mesh pattern as shown in FIG. 14, the dental handpiece 50 still feels uncomfortable to hold and may feel slippery.
Furthermore, the bearing oil injected into the bearing built into the head part 55 of the dental handpiece 50 leaks from the head part 55, and the oil flows into the elastic tube 53 from the direction of arrow a shown in FIG. If the oil flows into the elastic tube 53, the oil will accumulate in the mesh pattern (recesses) of the elastic tube 53, making the elastic tube 53 extremely slippery.
Furthermore, dirt tends to accumulate in the mesh pattern (recesses) of the anti-slip elastic tube.

The present inventors have succeeded in developing a non-slip device for a dental handpiece that is particularly resistant to rolling even when placed on a flat treatment table even by a slight external force.
We have also succeeded in developing a non-slip device for dental handpieces that does not roll easily and does not feel uncomfortable or slippery when gripped.
Furthermore, these anti-slip devices for dental handpieces are less slippery than mesh-patterned elastic tubes even if bearing oil flows into them, and dirt is less likely to accumulate in the anti-slip pieces.

The above-mentioned problem is solved by an anti-slip device according to the present invention that can be attached to a gripping part of a dental handpiece,
The anti-slip tool has a mounting part for mounting on the gripping part and a plurality of anti-slip pieces provided on the outer peripheral surface of the mounting part;
The longitudinal direction of the anti-slip piece and the longitudinal central axis of the mounting part are oriented in the same direction;
When a regular polygon is virtually drawn so as to circumscribe the outer peripheral surface of the mounting portion at a cut surface at a position where the diameter of the outer peripheral surface of the mounting portion is maximum, the non-slip surface at that cut surface. The sliding is performed so that the center point of a virtual perfect circle that includes the outer circumferential surface of the small piece is located on the line of the virtual equal dividing line connecting the center point of the mounting portion and the apex of the regular polygon. A stopper piece is arranged; and the highest vertex of the anti-slip piece is arranged at the vertex of the regular polygon, or on a line further extending the virtual equal dividing line from the apex. To be;
This problem can be solved by the above-mentioned anti-slip tool, which is characterized by:
According to a preferred embodiment of the anti-slip device according to the present invention, one side of the regular polygon is 3.0 mm to 5.0 mm.

The non-slip device for a dental handpiece according to the present invention is particularly resistant to rolling even by a slight external force when placed on a flat treatment table.
Further, the anti-slip tool for a dental handpiece according to the present invention is difficult to roll, and does not give a feeling of discomfort or slipperiness when gripped.
Furthermore, these non-slip devices for dental handpieces are less slippery than mesh-patterned elastic tubes even if bearing oil flows into them, and are also less likely to accumulate dust.

FIG. 3 is a side view before and after the anti-slip device according to the present invention is attached to a dental handpiece. FIG. 3 is a perspective view of the anti-slip device according to the present invention as viewed from the front and rear sides. 1 is a perspective view showing a method of using a dental handpiece equipped with an anti-slip device according to the present invention; FIG. FIG. 2 is a perspective view showing a state in which a dental handpiece equipped with an anti-slip device according to the present invention is temporarily placed on a flat treatment table. FIG. 2 is a side view and a perspective view of the anti-slip device as viewed from the rear side. FIG. 3 is a perspective view showing the external shape of the anti-slip piece. FIG. 3 is an explanatory diagram of a preferred embodiment of a region where the outer circumferential surface of the anti-slip piece and the outer circumferential surface of the mounting portion intersect. FIG. 6 is a diagram illustrating a method of arranging the anti-slip piece on the mounting portion. FIG. 6 is a diagram illustrating a method of arranging the anti-slip piece on the mounting portion. FIG. 6 is a diagram illustrating a method of arranging the anti-slip piece on the mounting portion. It is a diagram showing the arrangement of six anti-slip pieces. It is a diagram in which 12 anti-slip pieces are arranged. It is a diagram showing the arrangement of 18 anti-slip pieces. FIG. 2 is a side view of a conventional dental handpiece with an elastic tube.

Hereinafter, the anti-slip device according to the present invention will be explained with reference to the accompanying drawings, but the present invention is not limited to the embodiments shown in the accompanying drawings.
In this specification, terms indicating positional relationships (e.g., forward and backward) are used to refer to the dental handpiece when the non-slip device according to the present invention is attached and the dental handpiece is used in a normal manner, unless otherwise specified. It is used for positional relationships. Specifically, the direction in which the dental tool (for example, a scaling tip) exists is the front, and the direction in which the main body of the dental handpiece exists is the rear.

FIG. 1 is a side view of an anti-slip device 10 according to the present invention before and after it is attached to a dental handpiece 40.
The dental handpiece 40 mainly includes a grip part 41 and a main body part 43, as shown in FIG. 1(a). For example, a scaling tip 45 is attached to the front end of the dental handpiece 40.
The anti-slip tool 10 according to the present invention can be attached to the grip part 41 of the dental handpiece 40 (for example, it can be detachably attached), as shown in FIG. 1(b).

FIG. 2 is a perspective view of the anti-slip device 10 according to the present invention as viewed from the front and rear sides.
The anti-slip tool 10 includes a mounting portion 1 and a plurality of anti-slip pieces 2. The anti-slip device 10 can be manufactured using known materials (eg, elastic resin materials, rubber materials, or silicone rubber) and known methods.
The mounting portion 1 can have a substantially cylindrical shape including a tapered portion when viewed from the outside. Depending on the shape of the gripping part 41 of the dental handpiece 40, the tapered part can be provided only at the front part, from the front part to the middle part, or from the front part to the rear part.
The mounting portion 1 is provided with a mounting opening 12 from the front end to the rear end for mounting the anti-slip device 10 on the grip portion 41 of the dental handpiece 40 . The mounting opening 12 is formed by an inner circumferential surface 13 serving as a mounting accommodation surface. The shape of this inner circumferential surface 13 is substantially the same as the outer circumferential shape of the grip part 41 of the dental handpiece 40.
Further, the mounting portion 1 has an outer peripheral surface 14 as a supporting surface for supporting the plurality of anti-slip pieces 2 on the opposite side from the inner peripheral surface 13 as the mounting receiving surface.

A plurality of anti-slip pieces are provided on the outer circumferential surface 14 of the mounting portion 1. Preferably, each of the anti-slip pieces 2 has the same shape. The longitudinal direction of these anti-slip pieces 2 (arrow A shown in FIG. 2(a)) and the direction of the longitudinal central axis of the attachment part 1 (dotted chain line B shown in FIG. 2(a)) are in the same direction. It's suitable.
Adjacent anti-slip pieces are provided at a constant interval (distance indicated by arrow C shown in FIG. 2(a)).

The dental handpiece 40 equipped with the anti-slip device 10 can be used as shown in FIG.
Specifically, the dental handpiece is equipped with the anti-slip device 10 by gripping the anti-slip device 10 with a total of three points: the pad of the thumb, the pad of the index finger, and the back of the middle finger (like gripping a pencil). 40 can be used.
In particular, when it is desired to firmly grasp the dental handpiece 40 (that is, when it is desired to prevent the scaling tip 45 from rotating (rotation in the direction of arrow D shown in FIG. 3(a)), the method shown in FIG. 3(a) As shown in Figure 2, by placing three points in total, the pad of the thumb, the pad of the index finger, and the back of the middle finger, in the space between the small anti-slip pieces 2 (distance indicated by arrow C shown in Fig. 2(a)). This objective can be achieved. Considering that a total of three points, the pad of the thumb, the pad of the index finger, and the back of the middle finger, are arranged between the small anti-slip pieces 2, it is preferable that at least three spaces exist between the small anti-slip pieces 2. . That is, it is preferable that at least six anti-slip pieces 2 exist. In other words, it is preferable that at least three sets of adjacent anti-slip pieces 2 exist.
On the contrary, if you want to perform delicate operation of the scaling chip 45 (delicate operation in the direction of arrow E shown in FIG. 3(b)), use the pad of your thumb as shown in FIG. 3(b). This purpose can be achieved by arranging a total of three points, the pad of the index finger, and the back of the middle finger, on the front side of the anti-slip device 10 where the anti-slip piece 2 is not provided.

The dental handpiece 40 equipped with the anti-slip device 10 has the anti-slip pieces 2 placed at specific positions as described later, so when the dental hand piece 40 is temporarily placed on a flat treatment table, , this dental handpiece 40 will not roll in the direction of arrow F shown in FIG.

As shown in FIG. 5(a), the anti-slip tool 10 preferably does not include the anti-slip piece 2 in the front portion (region G1 shown in FIG. 5(a)). The reason for this is to perform delicate operations as shown in FIG. 3(b).
The length of the anti-slip device 10 in the longitudinal direction can be changed as appropriate depending on the shape of the grip portion 41 of the dental handpiece 40.
The length of the region G1 in the longitudinal direction is preferably 12 mm to 14 mm, particularly 13 mm, assuming that the length of the anti-slip device 10 in the longitudinal direction is 34 mm.
The length of the region G2 in the longitudinal direction is preferably 0 mm to 1 mm, particularly 1 mm, assuming that the length of the anti-slip tool 10 in the longitudinal direction is 34 mm.
The length in the longitudinal direction of the area where the anti-slip piece 2 is provided (area H shown in FIG. 5(a)) is 19 mm to 22 mm, especially when the length in the longitudinal direction of the anti-slip tool 10 is 34 mm. , 20 mm is preferred.

The thickness of the mounting portion 1 of the anti-slip device 10 (the distance indicated by the arrow I shown in FIG. 5(b)) is preferably 0.5 mm to 1.5 mm.

As shown in FIG. 6(a), the anti-slip piece 2 is designed to match the size of the arc J (which is part of the circumference of a virtual perfect circle) passing through the center point 20 in the longitudinal direction and the front side of the center point 20. The sizes of arcs K1, K2, K3, and K4 (which are part of the circumference of a virtual perfect circle) on the side and rear sides can be made substantially the same. Of course, the size of the circular arc at the front end and the rear end is smaller than the circular arc J and the circular arcs K1, K2, K3, and K4. Thereby, the anti-slip piece 2 can be smoothly connected to the outer circumferential surface 14 of the mounting portion 1.
Further, as shown in FIG. 6(b), the height of the anti-slip piece 2 can be gradually lowered toward the front and rear sides from the center point 20 in the longitudinal direction. Specifically, the size of the arc J (which is part of the circumference of a virtual perfect circle) that passes through the center point 20 in the longitudinal direction is the largest, and the arc J that passes through the center point 20 in the longitudinal direction is the largest, and from the center point 20 toward the front and rear sides. The sizes of circular arcs K1, K2, K3, and K4 (which are part of the circumference of a virtual perfect circle) gradually and continuously become smaller. That is, the diameter of the virtual perfect circle passing through the center point 20 is the largest, and the diameter of the virtual perfect circle gradually decreases toward the front and rear sides. Thereby, the anti-slip piece 2 can be smoothly connected to the outer circumferential surface 14 of the mounting portion 1.
Of course, the height of the anti-slip piece 2 can also be gradually lowered from an arbitrary position in the longitudinal direction.
As shown in FIG. 7, in the area where the outer circumferential surface 24 of the anti-slip piece 2 and the outer circumferential surface 14 of the attachment part 1 intersect, r (the radius of the virtual perfect circle L that includes this intersecting area as part) is 0 .5 to 1.0, particularly preferably 0.75. This prevents dirt from accumulating in the anti-slip device 10, and improves the strength of the anti-slip piece 2 with respect to the mounting part 1 (that is, preventing the small non-slip piece 2 from peeling off from the mounting part 1). ).
Since the anti-slip tool 10 does not have a mesh pattern as shown in FIG. 2, even if oil leaks from the bearing, the oil will not accumulate in the mesh pattern (recesses).

Next, a method of arranging the anti-slip piece 2 with respect to the mounting portion 1 in consideration of rolling prevention and/or ease of grip will be explained.
One of the characteristics of the anti-slip device 10 according to the present invention is that the arrangement of the anti-slip pieces 2 is determined using a regular polygon virtually drawn to circumscribe the outer peripheral surface of the mounting portion 1. It's where you are.
(1) First, determine the position where the diameter of the outer circumferential surface of the mounting portion 1 is maximum.
Specifically, after determining the shape of the mounting part 1 in consideration of the shape of the gripping part 41 of the dental handpiece 40, in this shape, the position where the diameter of the outer peripheral surface 14 of the mounting part 1 is maximum is determined. decide.
For example, in the case of the mounting part 1 having the shape shown in FIG. 8(a-1), at the position indicated by the symbol N, the diameter of the outer circumferential surface 14 of the mounting part 1 (the distance M shown in FIG. 8(a-1) ) is the maximum.
Next, information on the shape of the cut surface (which is approximately a perfect circle) as shown in FIG. 8(a-2) at the position indicated by the symbol N is obtained.
Here, the radial distance from the center point O of the mounting part 1 to the outer circumferential surface 14 (the distance indicated by the arrow P shown in FIG. 8(a-2)) is the general size of the grip part 41 of the dental handpiece 40. Taking this into account, the range is 4 mm or more and 12 mm or less.
(2) Next, a regular polygon circumscribing the outer circumferential surface 14 of the mounting portion 1 on this cut surface is virtually drawn.
That is, a virtual regular polygon as shown by the broken line in FIG. 8(b) is determined. Table 1 below is used when determining a virtual regular polygon.
In Table 1, the horizontal column represents the radial distance from the center point O of the attachment part 1 to the outer circumferential surface 14 (the distance indicated by the arrow P shown in FIG. 8 (a-2)), and the vertical column The columns represent the numerical value of n of the regular n-gon, and the center column shows the length of one side of the regular n-gon (that is, the vertex (Q1) and the vertex (Q2) in Fig. 8 (a-2). (distance indicated by symbol R)).
Here, Table 1 (i.e., a table showing the relationship between the above R, the above P, and the above numerical value of n) is created based on the following formula (this formula is a general formula). be):
R=2*P*tan(π/n).

Table 1 above is used as follows.
(A) First, the value of P in the horizontal column is determined in consideration of the size of the grip portion 41 of the dental handpiece 40.
(B) Next, in the value of P, check the column in which the value in the center column (=R) is 3.0 mm to 5.0 mm.
(C) Finally, determine the numerical value of n of the regular n-gon (vertical column) in the column that includes the range.
Note that the range of 3.0 mm to 5.0 mm in (B) above means that when the pad of the thumb, the pad of the index finger, and the back of the middle finger are placed in the space between the small anti-slip pieces 2, the handle This is the range in which you feel comfortable. On the other hand, if it is less than 3.0 mm, it may be difficult to place the finger. Moreover, if it exceeds 5.0 mm, the anti-slip effect of the anti-slip device 10 and the feeling of fixation of the fingers cannot be obtained.
Here, Table 1 is specifically used, for example, as follows.
(a) First, considering the size of the gripping part 41 of the dental handpiece 40, the value of P in the horizontal column is determined as 4.
(b) Next, in the value of P (=4), the center column (=R) is in the range of 3.0 mm to 5.0 mm (4.619, 3.853, 3.314). confirm.
(c) Finally, determine the numerical value of n (6, 7, 8 (square)) in the column (vertical column) that includes the range.
Here, the numerical value of n of the regular n-gon is preferably a multiple of 3, considering that the anti-slip tool is held with three fingers. Further, considering that the anti-slip tool is picked up from a flat base with two fingers, it is preferable that the number of anti-slip pieces is a multiple of two. In other words, the more preferable numbers of the anti-slip pieces are 6, 12, and 18, which are common multiples of multiples of 3 and 2.
Further, the value of n in the regular n-gon is preferably small from the viewpoint of preventing rolling. The reason for this is that the higher the value of n of the regular n-gon, the closer the shape of the regular n-gon becomes to a sphere and the easier it is to roll.
In particular, considering ease of gripping, ease of pinching, and prevention of rolling, it is more preferable to have a regular n-gon that is a common multiple of a multiple of 3 and a multiple of 2, and has a small numerical value of n.
In summary, when the value of P is 4, a regular hexagon is more preferable.

(3) Finally, determine the placement position of the anti-slip piece 2.
As shown in FIGS. 9(a) and 9(b), on the line of the (imaginary) equal dividing line S from the center point O of the mounting part 1 to the apex Q of the (imaginary) regular n-gon, a non-slip The anti-slip piece 2 is arranged such that the center point T of a virtual perfect circle (virtual perfect circle U1 represented by a broken line and a solid line) that includes the outer circumferential surface 24 of the small piece 2 is located. Note that FIG. 9(b) is a partially enlarged view of FIG. 9(a).
Here, the highest vertex V1 of the anti-slip piece 2 is located at the vertex Q of the (imaginary) regular n-gon, as shown in FIG. 9(b).
In addition, while the center point T of the virtual perfect circle U1 is placed on the (imaginary) equal dividing line S, the position of the center point T of the virtual perfect circle U1 can be changed (specifically, the position of the center point T on the outside or A line (imaginary) that further extends the (imaginary) equal dividing line S from the vertex Q of the (imaginary) regular n-gon by enlarging or reducing the size of the virtual perfect circle U1 ( The anti-slip piece 2 can also be arranged so that the highest vertex V2 of the anti-slip piece 2 is placed on the dashed line Y) shown in FIG. 9(b).
For example, if the position of the center point T of the virtual perfect circle U1 is moved outside without changing the size of the virtual perfect circle U1, the virtual perfect circle U1 (represented only by a broken line) in FIG. As shown in circle U2, anti-slip pieces 2 are arranged.
In this way, the highest vertex of the anti-slip piece 2 is located outside the vertex Q of the (imaginary) regular n-gon.
On the other hand, when the highest vertex of the anti-slip piece 2 is placed inside the vertex Q of the (imaginary) regular n-gon as shown in FIG. This makes it impossible to prevent rolling.

The anti-slip pieces 2 are arranged based on the shape of a (virtual) regular n-gon.

The height of the anti-slip piece, that is, the distance between the outer circumferential surface 14 of the mounting part 1 and the highest vertex V1 of the anti-slip piece 2 (distance indicated by arrow X in FIG. 9(b)) is preferably 1 mm or less. .
Further, the distance between the outer circumferential surface 14 of the mounting portion 1 and the highest vertex V2 of the anti-slip piece 2 is also preferably 1 mm or less.
If it exceeds 1 mm, there is a risk that the small anti-slip piece 2 will feel like a hindrance when gripped.

The length of the anti-slip piece 2 exposed from the outer circumferential surface 14 of the mounting portion 1 in the lateral direction (the distance indicated by the arrow W shown in FIG. 9(b)) is preferably 0.5 mm to 1.5 mm.

The height of the anti-slip piece (for example, when the highest vertex of the anti-slip piece 2 is placed at the vertex Q of a (virtual) regular n-gon, the distance of the arrow X shown in FIG. 9(b)) is the virtual It is preferable that the diameter is 1/2 or less of the diameter of a perfect circle. If it exceeds 1/2, the anti-slip piece 2 will peel off from the outer peripheral surface 14 of the mounting portion 1.

FIG. 11 is a diagram in which six anti-slip pieces are arranged using Table 1.
11(a) is a front view, FIG. 11(b) is a rear view, FIG. 11(c) is a plan view, FIG. 11(d) is a right side view, and FIG. 11(e) is a front view. is a perspective view, and FIG. 11(f) is a reference perspective view showing the state of use.
The anti-slip piece, which is one of the features of the present invention, is shown by a solid line, and the other parts are shown by a broken line.

FIG. 12 is a diagram in which 12 anti-slip pieces are arranged using Table 1.
12(a) is a front view, FIG. 12(b) is a rear view, FIG. 12(c) is a plan view, FIG. 12(d) is a right side view, and FIG. 12(e) is a front view. is a perspective view, and FIG. 12(f) is a reference perspective view showing the state of use.
The anti-slip piece, which is one of the features of the present invention, is shown by a solid line, and the other parts are shown by a broken line.

FIG. 13 is a diagram in which 18 anti-slip pieces are arranged at 18 equally divided points using Table 1.
13(a) is a front view, FIG. 13(b) is a rear view, FIG. 13(c) is a plan view, FIG. 13(d) is a right side view, and FIG. 13(e) is a front view. is a perspective view, and FIG. 13(f) is a reference perspective view showing the state of use.
The anti-slip piece, which is one of the features of the present invention, is shown by a solid line, and the other parts are shown by a broken line.

1... Mounting part; 2... Anti-slip piece; 10... Anti-slip tool;
12... Opening for mounting; 13... Inner peripheral surface; 14... Outer peripheral surface of the mounting part;
20... Longitudinal center point; 24... Outer peripheral surface of the anti-slip piece;
40... Dental handpiece; 41... Gripping part; 43... Main body part;
45... Scaling tip; 50... Conventional dental handpiece;
51... Conventional grip part; 53... Conventional main body part; 55... Conventional head part;

Claims (2)

An anti-slip device that can be attached to the grip of a dental handpiece,
The anti-slip tool has a mounting part for mounting on the gripping part and a plurality of anti-slip pieces extending in the longitudinal direction provided on the outer peripheral surface of the mounting part;
The longitudinal direction of the anti-slip piece and the longitudinal central axis of the mounting part are oriented in the same direction;
The front end and the rear end of the anti-slip piece are smoothly connected to the outer peripheral surface of the mounting part;
When a regular polygon is virtually drawn so as to circumscribe the outer peripheral surface of the mounting portion at a cut surface at a position where the diameter of the outer peripheral surface of the mounting portion is maximum, the non-slip surface at that cut surface. The sliding is performed so that the center point of a virtual perfect circle that includes the outer circumferential surface of the small piece is located on the line of the virtual equal dividing line connecting the center point of the mounting portion and the apex of the regular polygon. A stopper piece is arranged; and the highest vertex of the anti-slip piece is arranged at the vertex of the regular polygon, or on a line further extending the virtual equal dividing line from the apex. To be;
The anti-slip device characterized by: The anti-slip tool according to claim 1, wherein one side of the regular polygon is 3.0 mm to 5.0 mm.

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