JP3414857B2 - Dental tool rotary operating device and dental tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental tool rotation operating device for rotating a dental tool by being manually reciprocally rotated, and a dental tool attached to the dental tool rotation operating device for use. It is about tools.

[0002]

2. Description of the Related Art It is known to embed a tooth root member called an implant in a jawbone to fix a denture or the like, or to embed a dowel in a root portion to fix a crown or the like.
No. 647 and Japanese Patent Publication No. 61-11618. FIG. 8 shows a case in which a root member 102 is embedded in a jawbone 100 with a screw and a prosthesis 104 such as a denture is fixed to the root member 102 with a screw.
The technique disclosed in Japanese Patent Publication No. 47, however, the tooth root member 1
The operation of drilling or tapping the jawbone 100 to embed 02 in the jawbone 100 is generally performed using a dental engine 106 as shown in FIG. The dental engine 106 rotationally drives the tool 108 by an electric motor, an air-driven motor, or the like, and is widely used when cutting teeth in general dental treatment. It is performed by attaching a tap or the like. FIG. 10 is a view showing a dowel 110 embedded in a tooth root portion and a rotary operation device 112 for manually screwing the dowel 110.
The technique described in Japanese Patent No. 1618, the rotary operating device 112 is a large-diameter operating portion 116 concentric with the tool 114.
Is grasped by the operator's fingertips and rotated.

[0003]

However, tapping with a dental engine or tapping a predetermined screw member with a dental engine makes it possible to instantaneously rotate the dental engine by inertia even if the rotational speed of the dental engine is low. Since it cannot be stopped at any time, skill is required for the work. In the case of a rotary operation device that is manually rotated, the operation can be performed without requiring skill, but since the operation part of the conventional rotary operation device is concentric with the tool, the operator's fingertip can be put into the mouth. Since it is necessary to put it in and rotate it, workability is poor and hygiene is not preferable.

On the other hand, if a ratchet handle as specified in JIS B 4641 is used, the tool can be rotated by rotating the handle outside the mouth, and the rotational driving direction of the tool can be changed. It can be switched arbitrarily. However, it is structurally difficult to downsize such a ratchet handle to the extent that it can be used as a dental rotary operation device as it is, and a rotation drive direction switching mechanism is provided at the tip portion. However, the switching operation is not always easy.

The present invention has been made in view of the above circumstances. An object of the present invention is to rotate a small dental tool easily from the outside of the mouth and to easily switch the rotational driving direction. To provide a device.

[0006]

In order to achieve such an object, the first invention is to rotate a dental tool by detachably attaching the dental tool and manually reciprocally rotating the dental tool. A dental tool rotation operating device for making (a) a substantially straight line shape, a fitting hole is provided at a tip end portion so as to intersect with the straight line, and a fitting hole is formed from a rear end portion to the fitting hole. An operation handle provided with a through hole that reaches, (b) a fitting portion fitted in the fitting hole so as to be relatively rotatable, and the dental tool is held concentrically with the fitting portion and not relatively rotatable. And a holding member integrally formed with the engaging member, and a plurality of engaging grooves are provided on the outer peripheral surface of the fitting portion at regular angular intervals in the circumferential direction, and (c) according to the urging force of the spring. The tip is equipped with a check claw that can be engaged with the engaging groove. The operation member is disposed in the through hole, and the engagement groove and the check claw engage with each other to allow the rotating member to rotate in one direction relative to the fitting hole in the opposite direction. A rod-shaped ratchet member for preventing relative rotation, and (d) a ratchet member connected to the rear end of the ratchet member and pulled by the operation handle to resist the biasing force of the spring. The member is retracted to release the engagement with the engagement groove, and in that state, 1 around the axis of the operation handle.
It has a rotation switching knob for rotating the ratchet member 180 ° by being rotated by 80 °.

[0007]

In this dental tool rotation operating device, a predetermined dental tool is attached to the holding portion of the rotary member fitted in the fitting hole at the tip of the operating handle, Insert the tip of the operating handle into the mouth, and manually rotate the rear end of the operating handle protruding outside from the mouth to reciprocally rotate the dental tool at the tip in one direction. You can The engaging portion of the rotating member is provided with a large number of engaging grooves at regular angular intervals, while the operation handle is provided with a through hole and is provided with a ratchet member. The check claw is adapted to be engaged with the engagement groove. Due to the engagement of the check claw and the engagement groove, the rotating member and further the dental tool are moved along with the reciprocating rotation of the operation handle. It is driven to rotate in one direction. Further, a rotation switching knob is connected to the rear end of the ratchet member, and when the rotation switching knob is pulled and rotated by 180 °, the ratchet member is rotated by 180 °. When the direction of the check claw is reversed by 180 ° and the check claw is engaged with the engaging groove in accordance with the biasing force of the spring in that state, the rotating member associated with the reciprocating rotation of the operation handle,
Furthermore, the rotational driving direction of the dental tool is opposite.

As described above, according to the dental tool rotation operating device of the present invention, the dental tool inserted into the mouth can be easily rotationally driven from the outside of the mouth, and can be rotationally driven by operating the rotation switching knob. The direction can be easily switched. Further, since the ratchet member and the spring are arranged in the through hole provided through the operation handle, when the ratchet member and the spring are arranged in a concentrated manner at the tip portion where the rotating member is fitted. In comparison, the structure of the tip portion can be simplified, the device can be downsized, and the ratchet member or the like can be inserted into the through hole from the rear end of the operation handle to facilitate the assembly.

Incidentally, such a dental tool rotation operating device is
Rotation with a tap that processes a female screw in a preformed hole in the jawbone or teeth, and a tip engaging portion such as "-" or "+" that screws a tooth root member into the prepared hole provided with the female screw The tool is preferably used when manually rotating the tool, but it is also possible to use it by attaching a drill or a reamer that processes the prepared hole to the jawbone or teeth.

[0010]

A second aspect of the present invention is the dental tool rotation operating device according to the first aspect of the present invention, wherein one or the other of the operation handle and the rotation switching knob has a biasing force of the spring. According to the above, they are engaged with each other so that they cannot rotate relative to each other,
The rotation switching knob is positioned at two 180 ° out-of-phase positions where the check claw engages with the engagement groove, and
It is characterized in that a positioning groove and a positioning projection are provided for maintaining the positioning state thereof regardless of the reciprocal movement of the rotation switching knob due to the relative rotation of the operation handle and the rotating member.

[0011]

In this case, due to the engagement between the positioning groove and the positioning projection, the rotation switching knob is located at two positions 180 ° out of phase with each other by which the check claw engages with the engaging groove. Since the positioning is performed, it is possible to easily and quickly perform the switching operation of the rotation driving direction by the rotation switching knob. Further, when the operating handle and the rotating member rotate relative to each other, the check claw is pushed out of the engaging groove against the biasing force of the spring, and accordingly, the rotation switching knob connected to the ratchet member reciprocates. However, the engagement between the positioning groove and the positioning protrusion is maintained regardless of the reciprocating movement of the ratchet member, so that the ratchet member rotates and engages with the check claw when the operating handle and the rotating member rotate relative to each other. Engagement with the groove is not impaired, and stable operation is always obtained.

[0012]

A third aspect of the present invention is a dental tool rotation operating device in which a dental tool is removably attached and is manually reciprocally rotated to rotate the dental tool. Therefore, (a) a substantially straight line is formed, and a fitting hole is provided at the front end so as to be orthogonal to the straight line, and a through hole reaching from the rear end to the fitting hole is provided. The operating handle, (b) a fitting portion that is fitted in the fitting hole so as to be rotatable relative to each other, and a holding portion that holds the dental tool concentrically with the fitting portion and is non-rotatable. It has an integral structure and is detachably mounted from both sides of the fitting hole, and a plurality of engaging grooves are provided on the outer peripheral surface of the fitting portion at regular angular intervals in the circumferential direction. The member and (c) a certain size in the fitting hole according to the urging force of the spring. Is provided in the through hole of the operation handle with a check claw protruding only at the tip, and the check claw is engaged with the engaging groove of the rotating member according to the biasing force of the spring, A rod-shaped member that holds the rotating member in the fitting hole in a removable manner and allows the rotating member to rotate in one direction relative to the fitting hole while preventing the rotating member from rotating in the opposite direction. And a ratchet member.

[0013]

In the dental tool rotation operating device as described above, as in the first invention, the holding portion of the rotating member is manually reciprocally rotated at the rear end of the operating handle. The dental tool attached to the can be rotated in one direction. Further, the rotating member is detachably held in the fitting hole by the check claw being engaged with the engaging groove in accordance with the urging force of the spring, and therefore the rotating member resists the urging force of the spring and is fitted into the fitting hole. If the operating handle is separated so that the rotating member is separated from the rotating member, and the operating handle is rotated 180 ° around a straight line to fit the rotating member from the opposite side of the fitting hole, the direction of the check claw with respect to the rotating member is increased. Is inverted by 180 ° so that the rotational driving direction of the rotary member and the dental tool associated with the reciprocal rotation of the operating handle is reversed. Since the operation handle is straight, and the fitting hole into which the rotating member is fitted is provided so as to be orthogonal to the straight line, the operation handle is rotated 180 ° to fit the rotating member. As a result, even if the rotational drive direction is switched, the operability of the operating handle does not change at all. In this regard, in carrying out the first aspect of the present invention, the fitting hole does not necessarily need to be orthogonal to the straight line, and may be inclined from the straight line, that is, the direction perpendicular to the axis of the operation handle.

As described above, also in the dental tool rotation operating device according to the third aspect of the present invention, the dental tool inserted into the mouth can be easily driven to rotate from the outside of the mouth, and the operation handle can be attached to the rotating member. The rotation driving direction can be easily switched only by reversing 180 °. Further, since the ratchet member and the spring are arranged in the through hole provided through the operation handle, when the ratchet member and the spring are arranged in a concentrated manner at the tip portion where the rotating member is fitted. The structure of the tip can be simplified compared to
The device can be downsized, and the ratchet member or the like can be inserted into the through hole from the rear end of the operation handle to facilitate the assembly.

[0015]

A fourth aspect of the present invention makes it possible to attach / detach to / from the dental tool rotation operating device according to any one of the first to third aspects of the invention, wherein the holding portion is a regular octagonal mounting hole. A dental tool attached and used, characterized in that a cross section corresponding to the regular octagonal mounting hole has a regular octagonal shaft portion.

[0016]

As described above, if the holding portion of the dental tool rotation operating device is a regular octagonal mounting hole and a dental tool having a shaft section with a regular octagonal cross section is used, it is necessary. The diameter dimension of the mounting hole and the shaft portion can be reduced as much as possible while ensuring the torque transmission performance, and the dental tool rotation operating device can be further downsized. That is, the JIS
In the ordinary ratchet handle specified in B4641, the shape of the holding portion that holds the tool is a square, but when a certain width across flat is determined to secure a predetermined transmission torque, the number of angles is The smaller the number, the larger the diameter of the circumscribing circle. Therefore, when miniaturization is strongly required as in the present invention, it is desirable to increase the number of corners of the holding portion as much as possible. However, if the number of corners is too large, the corners will tend to be rounded during torque transmission, and durability and torque transmission performance will be impaired.Therefore, the rotational resistance and tool diameter when cutting the jawbone and teeth should be reduced. Considering this, the present invention adopts a regular octagon.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 are a vertical cross-sectional view and a partially cutaway plan view of a dental tool rotation operating device 10. The dental tool rotation operating device 10 includes a dental tool shown in FIG. 3 as a dental tool, for example. The tap 12 is attached and used. The dental tool rotation operating device 10 includes a handle body 14 having an elongated shape, a rotating member 16 provided at the tip of the handle body 14, a ratchet member 18 provided inside the handle body 14, and a ratchet. Member 18
The rotation switching knob 20 is integrally connected to the rear end of the rear portion. The handle main body 14 has a straight line shape, and a fitting hole 22 is formed through the front end portion thereof so as to be orthogonal to the straight line, and a through hole reaching the fitting hole 22 from the rear end portion. 24 are provided. The handle body 14 is made of stainless steel such as SUS304 and has an outer diameter of about 6 mm and an inner diameter, that is, the diameter of the through hole 24 is about 4.5 mm. The diameter of the fitting hole 22 is 7
The length dimension from the center line O of the fitting hole 22 to the rear end portion of the handle body 14, that is, the boundary with the screw member 46 is about 63.5 mm. Handle body 14
A flat knurl is provided in a predetermined range on the rear end side of the outer peripheral surface in parallel to the axial direction.

As is apparent from FIG. 4 which is shown separately, the rotary member 16 has a fitting portion 26 having a cylindrical outer peripheral surface which is fitted in the fitting hole 22 so as to be relatively rotatable, and the fitting portion 26.
Mounting hole 28 with a bottom and a concentric cross section
It has and. The mounting hole 28 corresponds to a holding portion, and the mounting hole 28 holds the dental tap 12 concentrically and relatively non-rotatably. The width across flats of the mounting hole 28, that is, the distance between two parallel surfaces located on opposite sides of the shaft center is about 3.8 mm, and the opening portion of the mounting hole 28 is chamfered 30. . An outward flange 32 is provided at one end of the rotating member 16, that is, an end on the opening side of the mounting hole 28, and the outward flange 32 is provided.
Is brought into contact with the opening peripheral portion of the fitting hole 22, so that the mounting position of the rotary member 16 with respect to the fitting hole 22 is positioned. The rotary member 16 is inserted into the fitting hole 22 from the opposite side of the outward flange 32, that is, from the tip of the fitting portion 26, and the tip outer peripheral portion is chamfered 31. The fitting portion 26 can be inserted from the openings on both sides of the fitting hole 22, and the rotating member 16 can be attached to the handle body 14 in an upside down posture in FIG. 1, but is positioned by the outward flange 32. As a result, the center portion of the fitting portion 26 in the longitudinal direction is positioned on the axial center of the handle body 14, that is, the center line of the through hole 24 regardless of the mounting posture of the rotating member 16. The fitting hole 22 is a through hole 24.
Is formed symmetrically with respect to the center line of the fitting part 26, and the length dimension of the fitting part 26 is the same as the length dimension of the fitting hole 22.
It is about m. A large number of engaging grooves 34 are provided on the outer peripheral surface of the fitting portion 26 at regular angular intervals in the circumferential direction. In this embodiment, twelve engaging grooves 34 are provided at intervals of 30 °, but this interval and the number can be changed appropriately. The engagement groove 34 is
It is formed with a width dimension of about 1 mm in parallel with the axial center of the fitting portion 26, and the depth thereof is deepest at the central portion in the axial direction of the fitting portion 26 and gradually becomes shallower as it is separated from the central portion. It has an arc shape. The depth dimension of the deepest part is 0.
The radius of curvature is about 7 mm and about 3 mm. The rotating member 16 is made of stainless steel such as SUS440, and a flat knurl is provided on the outer peripheral surface of the outward flange 32 in parallel with the axial direction. 4A is a plan view of the rotating member 16 as viewed from below in the state of FIG. 1, FIG. 4B is a sectional view taken along line BB in FIG. 4A, and FIG. It is CC sectional drawing in b).

The ratchet member 18 has a cylindrical shape having substantially the same diameter as the through hole 24, and is disposed in the through hole 24 so as to be movable in the axial direction and rotatable about the axis. A check claw 36 shown in detail in FIG. 5 is provided at the tip portion. The check claw 36 has a width of about 3 mm, which is the horizontal dimension in FIG. 5B, a tip thickness of about 0.5 mm, which is the vertical dimension, and a height that is the horizontal dimension of FIG. 5C. Is about 0.5 mm, as shown in FIG.
In FIG. 5 (c), the lower engaging surface 38 is a flat surface substantially parallel to the axis and the upper rear surface 40 is arcuate.
In (a), the upper and lower side surfaces 42 are inclined surfaces that gradually increase in width as they are separated from the tip. As shown in FIG. 1, when the ratchet member 18 is biased toward the distal end side by the compression coil spring 44, the check claw 36 is projected from the through hole 24 into the fitting hole 22 to rotate the check claw 36. The outer peripheral surface of the fitting portion 26 of the member 16 is pressed and engaged with the engagement groove 34. Due to the engagement of the check claw 36 and the engagement groove 34, the rotation member 16
Is removably held in the fitting hole 22, and allows the rotating member 16 to relatively rotate in one direction with respect to the fitting hole 22 while preventing relative rotation in the opposite direction.

More specifically, the side surface 4 of the check claw 36
Due to the engagement between the engaging groove 2 and the engaging groove 34, the rotating member 16 is positioned in the fitting hole 22 by a force corresponding to the urging force of the compression coil spring 44, and the rotating member 16 receives a downward force in FIG. When added, the check claw 36 is pushed out of the engagement groove 34 against the biasing force of the compression coil spring 44 by the cam action based on the arc of the bottom of the engagement groove 34 and the inclination of the side surface 42 of the check claw 36. The rotary member 16 can be removed from the fitting hole 22. When the rotating member 16 is removed, the ratchet member 18 is moved to the tip side according to the urging force of the compression coil spring 44. However, the rotation switching knob 20 integrally connected to the rear end of the ratchet member 18 has the handle main body. The non-return pawl 36 is brought into contact with the screw member 46 screwed to the rear end of the check member 14.
The projection size of the above into the fitting hole 22 is defined to be substantially the same as or slightly larger than those in FIGS. 1 and 2. Therefore, when the rotating member 16 is pushed into the fitting hole 22 from the tip of the fitting portion 26 in that state, the cam of the chamfered tip 31 of the fitting portion 26 and the side surface 42 of the check pawl 36 causes the check nail to move. 36 is pushed out from the fitting hole 22 against the biasing force of the compression coil spring 44, and the fitting portion 26 is allowed to fit into the fitting hole 22.

Further, as shown in FIGS. 1 and 2, the check claw 36 is provided.
2 is engaged with the engagement groove 34, when the handle body 14 is rotated clockwise about the center line O in FIG. 2, the engagement surface 38 of the check claw 36 and the side wall of the engagement groove 34 are rotated. The rotation member 16 is rotated rightward about the center line O integrally with the handle main body 14 by the locking. When the handle body 14 is rotated counterclockwise of the center line O, the check claw 3
If the rotation resistance of the rotating member 16 is less than or equal to a predetermined value due to the engagement between the back surface 40 of the rotating member 6 and the side wall of the engaging groove 34, the rotating member 16
Is rotated around the center line O integrally with the handle main body 14, but if the rotation resistance of the rotating member 16 is larger than a predetermined value, the check claw 36 is biased by the compression coil spring 44 due to the cam action of the back surface 40. The handle body 14 is pushed out of the engagement groove 34 against the rotation member 16, and the handle body 14 is rotated relative to the rotation member 16 counterclockwise about the center line O. Therefore, for example, when tapping with the dental tap 12,
When a predetermined rotation resistance is given to the rotating member 16,
When the handle body 14 is reciprocally rotated about the center line O, the rotating member 16 is rotationally driven clockwise about the center line O in FIG. If the rotating member 16 is mounted in the fitting hole 22 while the handle main body 14 is rotated by 180 ° about its axis, the posture of the check claw 36 becomes upside down as compared with the case of FIG. As the handle body 14 reciprocally rotates, the rotating member 16 moves in the opposite direction,
That is, it is driven to rotate counterclockwise of the center line O.

The ratchet member 18 is made of SUS420.
Etc. are made of stainless steel. 5C is a front view showing the tip of the ratchet member 18, FIG. 5A is a plan view, and FIG. 5B is a left side view, that is, a view from the tip side.

As shown in FIG. 1, a small-diameter connecting rod 50 is integrally provided at the rear end of the ratchet member 18, and is inserted through a through hole 52 formed in the screw member 46. The rotation switching knob 20 is integrally attached to a tip portion protruding from the screw member 46 by a set screw (not shown). A flat portion 54 is provided on the outer peripheral surface of the distal end portion of the connecting rod 50, and the set screw screwed into the rotation switching knob 20 is pressed against the flat portion 54, whereby the shafts of the connection rod 50 and the rotation switching knob 20 are rotated. The relative position around the center is fixed, and the relative rotation between the two is reliably prevented. The screw member 46 locks the rear end of the compression coil spring 44, and constitutes an operation handle together with the handle body 14. As shown in FIG. 6, the screw member 46 includes a head portion 56 having an outer diameter substantially the same as the outer diameter of the handle body 14, and a male screw portion 58 screwed to the rear end portion of the handle body 14. And a positioning groove 62 is formed on the end surface 60 of the head portion 56 so as to be orthogonal to the axis. The positioning groove 62 has a width dimension of about 1.5 mm, a depth dimension of about 2 mm, and is divided by a through hole 52 having a diameter of about 2.5 mm. The screw member 46 is made of stainless steel such as SUS304, and a flat knurl is provided on the outer peripheral surface parallel to the axial direction. Further, (a) of FIG. 6 is a front view in which the lower half is a cross section, and (b) is a right side view of (a).

The rotation switching knob 20 has an outer diameter substantially the same as the outer diameter of the screw member 46, and is provided with a bottomed hole 64 having substantially the same diameter as the through hole 52, and the tip portion of the connecting rod 50 is inserted. It is supposed to be done. Further, as shown in FIG. 7, the rotation switching knob 20 is provided with a screw hole 66 for screwing the set screw, and an end face 68 facing the end face 60 is provided with a shaft. The positioning protrusion 70 is provided so as to be orthogonal to the center. The positioning projection 70 has a width dimension of about 1.5 mm and a height dimension of about 1.5 mm, and can be engaged with the positioning groove 62. The rotation switching knob 20 is made of stainless steel such as SUS304, and the outer peripheral surface including the positioning convex portion 70 is provided with flat knurls parallel to the axial direction.
Further, FIG. 7B is a front view in which the lower half is a cross section,
(A) is a left side view of (b).

When the positioning projection 70 is engaged with the positioning groove 62 in accordance with the biasing force of the compression coil spring 44, the rotation switching knob 20 is positioned at two positions with the phase around the axis shifted by 180 °. Connecting rod 50
The ratchet member 18 connected to the rotation switching knob 20 via the is positioned at two positions 180 degrees out of phase so that the check claw 36 at the tip end is parallel to the center line O of the fitting hole 22. The screw member 46 is configured such that the positioning groove 62 is oriented in a predetermined direction in a state of being screwed into the handle body 14, and in this embodiment, it is parallel to the center line O of the fitting hole 22 as is apparent from FIG. Has been done. In addition, the positioning protrusion 7
By fitting 0 into the positioning groove 62, the engagement of the check claw 36 of the ratchet member 18 and the engagement groove 34 is allowed, and the engagement of these causes the end surface 60 of the screw member 46.
A slight gap is formed between the end face 68 of the rotation switching knob 20 and the end face 68. In that state, when the handle body 14 and the rotating member 16 are relatively rotated about the center line O, specifically, when the handle body 14 is rotated counterclockwise with respect to the rotating member 16 in FIG. Each time the check claw 36 is pushed out of the engagement groove 34, the rotation switching knob 20 is moved in the direction away from the screw member 46, but the positioning projection 70 does not separate from the positioning groove 62, and the relationship between the two does not occur. The fitted state is maintained, the posture of the check claw 36 is held constant, and the check groove 36 is reliably engaged with the engagement groove 34. On the other hand, when the rotation switching knob 20 is pulled against the urging force of the compression coil spring 44 until the positioning protrusion 70 completely comes out of the positioning groove 62, the check claw 36 comes out of the engaging groove 34, and in that state. Turn the rotation selector knob 20 to approximately 180 °
When the positioning protrusion 70 is rotated and fitted into the positioning groove 62 by the urging force of the compression coil spring 44, the rotation switching knob 20 and the ratchet member 18 are reversed by 180 °. As a result, the check claw 36 is also inverted by 180 °, and the locking surface 38 that prevents relative rotation and the back surface 40 that allows relative rotation are in opposite directions, and the handle body 1
The rotation direction of the rotating member 16 due to the reciprocating rotation of 4 becomes opposite.

On the other hand, the dental tap 12 shown in FIG. 3 has a male screw portion 72 and a shaft portion 74 each of which includes a bite portion and a complete mountain portion.
And the male screw portion 72 has a plurality of twist grooves 76.
A cutting edge is provided along. The shaft portion 74 is a portion that is fitted into the mounting hole 28 of the rotating member 16 so as not to rotate relative to it, and has a regular octagonal cross-sectional shape that is substantially the same size as the mounting hole 28.

The dental tool rotation operating device 10 and the dental tap 12 configured as described above are used when a female screw is formed in a prepared hole previously formed in a jaw bone or a tooth. First, the dental tool is used. The shaft portion 74 of the dental tap 12 is fitted and mounted in the mounting hole 28 of the rotary member 16 of the rotary operation device 10. Then, after inserting the tip portion including the dental tap 12 and the rotating member 16 into the mouth and aligning the dental tap 12 concentrically with the prepared hole, after the handle body 14 protruding from the mouth to the outside. If you reciprocally rotate the end manually,
The tap can be performed by rotating the dental tap 12 in one direction. The rotation driving direction of the dental tap 12 in this case is determined by the direction of the check claw 36 of the ratchet member 18, and the rotation switching knob 20 is pulled to rotate 180 °, or the handle body 14 is pulled out from the rotation member 16 and the shaft is removed. If it is rotated about the center by 180 ° and fitted again to the rotating member 16, the rotating direction of the rotating member 16 and the rotational driving direction of the dental tap 12 are reversed. Therefore, the handle body 14 is rotated to operate the dental tap 12
By rotating the dental tap 12 in one direction and processing the internal thread in the pilot hole, and then switching the rotational driving direction of the dental tap 12, the dental tap 12 is rotated in the opposite direction by the same turning operation of the handle body 14, The dental tap 12 can be extracted from the screw for tapping.

As described above, according to the dental tool rotation operating device 10 of this embodiment, the dental tool such as the dental tap 12 can be easily rotationally driven from the outside of the mouth while being inserted into the mouth. The rotation drive direction can be easily switched by pulling or rotating the rotation switching knob 20. Further, since the ratchet member 18 and the compression coil spring 44 are arranged in the through hole 24 provided through the handle body 14, the ratchet member 18 and the compression coil spring 44 are attached to the tip end portion where the rotating member 16 is fitted. The structure of the tip portion can be simplified and the device can be downsized as compared with the case where the urging means and the urging means are arranged in a concentrated manner, and at the same time, the ratchet member 18 and the compression coil spring 44 of the handle body 14 are provided.
By inserting the rear end into the through hole 24, the assembly can be easily performed. In this assembly, for example, after inserting the ratchet member 18 and the compression coil spring 44 into the handle body 14, the screw member 46 is screwed into the handle body 14 to connect the rotation switching knob 20 to the connecting rod 5.
0 may be attached, but ratchet member 1
8, the compression coil spring 44 and the screw member 46 are attached to the connecting rod 50 of 8, and the rotation switching knob 20 is attached.
After that, the ratchet member 18 may be inserted into the handle body 14 and the screw member 46 may be screwed.

Further, in this embodiment, due to the engagement of the positioning groove 62 and the positioning convex portion 70, the rotation switching knob 20 is out of phase by 180 ° when the check claw 36 engages with the engagement groove 34.
Since it is positioned at the position, the switching operation of the rotation driving direction by the rotation switching knob 20 can be performed easily and quickly. When the handle body 14 and the rotating member 16 rotate relative to each other, the check claw 36 is pushed out of the engaging groove 34 against the biasing force of the compression coil spring 44, and accordingly, the check claw 36 is connected to the ratchet member 18. The rotation switching knob 20 is reciprocally moved in the axial direction of the handle body 14, but the positioning groove 62 and the positioning projection 7 are irrespective of the reciprocating movement.
Since the engagement state with 0 is maintained, the ratchet member 18 may rotate during relative rotation between the handle body 14 and the rotating member 16, and the engagement state between the check claw 36 and the engagement groove 34 may be impaired. There is always stable operation.

Further, in this embodiment, the handle body 14 is pulled out from the rotating member 16 and rotated by 180 ° about the axis,
Although the rotation drive direction can be reversed by fitting the rotary member 16 again, the handle main body 14 is in a straight line, and the fitting hole 22 into which the rotary member 16 is fitted is formed.
Is provided so as to be orthogonal to the straight line, the operability of the handle body 14 does not change at all even if the handle body 14 is rotated 180 ° around the axis to switch the rotational drive direction.

Further, in this embodiment, since the cross-sectional shape of the mounting hole 28 of the rotary member 16 and the shaft portion 74 of the dental tap 12 fitted into the mounting hole 28 is a regular octagon, the required torque is required. Its mounting hole 2 while ensuring transmission performance
8 and the diameter of the shaft portion 74 can be made as small as possible, and the dental tool rotation operating device 10 can be further downsized. That is,
In the ordinary ratchet handle defined in JIS B 4641, the shape of the holding portion for holding the tool is a square, but when a certain width across flats is set to secure a predetermined transmission torque, The smaller the number, the larger the diameter of the circumscribing circle. Therefore, when miniaturization is strongly required, it is desirable to increase the number of corners as much as possible. For example, when the width across flats is 3.8 mm as in this embodiment, the diameter of the circumscribing circle is about 4.1 mm in the regular octagon, but the diameter of the circumscribing circle in the regular hexagon is about 4.4 mm, and the number of corners is The smaller the number, the larger the required diameter dimension. However, if the number of corners is too large, the corners will tend to be rounded during torque transmission, and durability and torque transmission performance will be impaired.Therefore, the rotational resistance and tool diameter when cutting the jawbone and teeth should be reduced. Considering it, it is a regular octagon.

Although one embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other modes.

For example, in the above-described embodiment, the mounting posture of the rotating member 16 with respect to the handle body 14 is changed, or the ratchet member 18 is attached to the handle body 1 by the rotation switching knob 20.
By rotating 180 ° with respect to 4, the rotating member 1
The rotation drive direction of 6 can be switched,
The rotational driving direction may be switched by only one of them. That is, the rotating member 16 is attached to the handle body 1
It is arranged so as not to be detachable with respect to No. 4, or the ratchet member 18
It may be arranged so that it cannot rotate relative to the handle body 14.

Further, in the above embodiment, the rotary member 16 is provided with the mounting hole 28 as a holding portion, and the dental tap 12 as the dental tool is fitted in the mounting hole 28 so as not to rotate relative to the shaft portion. Although 74 is provided, conversely, the rotating member 16 may be provided with a shaft portion as a holding portion, and the dental tool may be provided with a mounting hole. It is desirable that the shaft portion and the mounting hole are regular octagons, but other regular polygons such as regular quadrangle and regular hexagon may be used. For example, JIS T 5201
It is possible to configure it so that it can be used by directly attaching the dental bar prescribed in sect., Or to prepare multiple types of rotating members with different holding part configurations and replace it according to the tool used. Is. In addition, the structure of the holding portion is appropriately changed, such as holding the dental tool in a relatively non-rotatable and non-releasable manner by a lock mechanism that engages a plurality of balls and the like across the rotating member and the dental tool. obtain.

Further, in the above embodiment, the positioning groove 62 is provided in the screw member 46 which constitutes the operation handle, and the positioning projection 70 is provided in the rotation switching knob 20, but the positioning projection is provided in the screw member 46. There may be no problem even if the rotation switching knob 20 is provided with a positioning groove.

Although the dental tap 12 has been described as an example of the dental tool in the above-mentioned embodiment, other dental tools such as a drilling tool such as a drill and a rotary tool for rotating a screw member can be attached and used. Of course.

Further, in the above embodiment, the ratchet member 18
As a spring for urging the compression coil spring 44
However, other springs such as disc springs can be used.

Further, the size, shape, and material of the dental tool rotation operating device 10 in the above embodiment are merely examples, and can be changed as appropriate.

Although not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a sectional view of a dental tool rotation operating device according to an embodiment of the present invention.

FIG. 2 is a plan view in which a part of the dental tool rotation operating device of FIG. 1 is cut away.

FIG. 3 is a view showing an example of a dental tool attached to the dental tool rotation operating device of FIG. 1 and used.

4A and 4B are views showing a rotating member alone in the dental tool rotation operating device of FIG. 1, in which FIG. 4A is a plan view and FIG.
3B is a cross-sectional view taken along the line BB in FIG.

5A and 5B are views showing a tip end portion of a ratchet member in the dental tool rotation operating device of FIG. 1, in which FIG. 5A is a plan view and FIG.
Is a left side view and (c) is a front view.

FIG. 6 is a view showing a screw member in the dental tool rotation operating device of FIG. 1, (a) is a front view with a lower half being a cross section,
(B) is a right side view.

7A and 7B are views showing a rotation switching knob in the dental tool rotation operating device of FIG. 1, in which FIG. 7A is a left side view and FIG.

FIG. 8 is a cross-sectional view illustrating an example of a case where a tooth root member is embedded in a jawbone and a prosthesis such as a denture is fixed with a screw.

FIG. 9 is a perspective view showing an example of a dental engine conventionally used for dental treatment.

FIG. 10 is a perspective view showing an example of a rotary operation device for screwing a dowel into a tooth root together with the dowel.

[Explanation of symbols]

10: Dental tool rotation operating device 12: Dental tap (dental tool) 14: Handle body (operation handle) 16: Rotating member 18: Ratchet member 20: Rotation switching knob 22: Mating hole 24: Through hole 26: Fitting part 28: Mounting hole (holding part) 34: Engagement groove 36: Check claw 44: Compression coil spring (spring) 46: Screw member (operation handle) 62: Positioning groove 70: Positioning projection 74: Shaft

Continuation of the front page (56) Reference JP-A-61-164781 (JP, A) Actually open 6-36612 (JP, U) Actually open 5-200055 (JP, U) Actually open 63-103615 (JP , U) Actually developed 53-134497 (JP, U) Actually developed 55-98571 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61C 3/02 A61C 1/00 A61C 8/00

Claims (4)

(57) [Claims] 1. A dental tool is removably attached,
A dental tool rotation operating device for rotating the dental tool by being manually reciprocally rotated, which has a substantially straight line shape, and a fitting hole is provided at a tip end portion so as to intersect with the straight line. The operating handle is provided with a through hole that extends from the rear end portion to the fitting hole, a fitting portion that is relatively rotatably fitted in the fitting hole, and the dental tool is the fitting portion. And a rotating member that has a holding portion that is concentrically and relatively non-rotatably held, and that has a plurality of engaging grooves provided at a constant angular interval in the circumferential direction on the outer peripheral surface of the fitting portion, The tip is provided with a check claw that is engaged with the engagement groove according to the urging force of a spring, and the check claw is disposed in the through hole of the operation handle. Allow the rotating member to rotate relative to the fitting hole in one direction. A rod-shaped ratchet member for preventing relative rotation in the opposite direction, and a ratchet member connected to the rear end of the ratchet member and pulled by the operation handle to resist the biasing force of the spring. A rotation switching knob for retracting the member to release the engagement with the engagement groove, and for rotating the ratchet member 180 ° by rotating the member 180 ° about the axis of the operation handle in that state. A dental tool rotation operating device having. 2. The operation handle and the rotation switching knob are engaged with one and the other of the rotation switching knob in a relatively non-rotatable manner by bringing them close to each other according to the biasing force of the spring, and the rotation switching knob is The non-return pawl is positioned at two positions that are 180 degrees out of phase with each other and engages with the engagement groove, and the positioning is performed regardless of the reciprocal movement of the rotation switching knob due to the relative rotation between the operation handle and the rotary member. The dental tool rotation operating device according to claim 1, further comprising a positioning groove and a positioning protrusion that maintain the state. 3. A dental tool is removably attached,
A dental tool rotation operating device for rotating the dental tool by being manually reciprocally rotated, which has a substantially straight line shape, and a fitting hole is formed at a tip end thereof so as to be orthogonal to the straight line. The operation handle provided with a through hole reaching the fitting hole from the rear end, a fitting portion fitted in the fitting hole so as to be relatively rotatable, and the dental tool. The fitting portion is concentrically provided with a holding portion that holds the fitting portion so that the fitting portion cannot rotate relative to the fitting portion, and the fitting portion is detachably mounted from both sides of the fitting hole. A rotary member provided with a plurality of engaging grooves at regular angular intervals in the direction, and a non-return pawl protruding at a fixed dimension into the fitting hole according to the urging force of a spring at the tip end thereof, and the through hole of the operation handle is provided. Is arranged inside and follows the urging force of the spring By engaging the check claw with the engaging groove of the rotating member, the rotating member is detachably held in the fitting hole, and the rotating member is opposed to the fitting hole in one direction. And a rod-shaped ratchet member that allows relative rotation and prevents relative rotation in the opposite direction. 4. The dental tool used by being detachably attached to the dental tool rotation operating device according to claim 1, wherein the holding portion is a regular octagonal mounting hole. And a cross-section corresponding to the regular octagonal mounting hole has a regular octagonal shaft portion.