JP2019076593A - Dental handpiece - Google Patents

Abstract

To provide a dental handpiece in which a position of a cutting chip is stabilized and which allows an operator to safely perform treatment.SOLUTION: A dental handpiece comprises: a handpiece body 1 in which a vibration generation source 10 is included; a cutting chip 2 which is attached to a tip of the handpiece body 1 and to which vibration from the vibration generation source 10 is transmitted; and a cylindrical cover body 3 which is detachably attached to the handpiece body 1, and covers the cutting chip 2 in a state of being insulated from the cutting chip 2. The cover body 3 comprises: a cylindrical first cover part 31 for covering a base part 21 of the cutting chip 2; and a second cover part 32 for covering an end part 22 of the cutting chip 2 and being continuously formed on the first cover part 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vibrating dental handpiece.

In dental care, handpieces are widely used for cutting or drilling teeth, removing tartar, polishing the tooth surface, etc., and cleaning the tooth surface (including interdental teeth). As shown in, for example, Patent Document 1, a handpiece includes a rotary handpiece provided with an air turbine or an air motor, and a vibrating handpiece provided with a vibration source. The rotary handpiece has high cutting power, but on rotation, the load on the patient's tooth surface and gums is also large, often causing pain to the patient. On the other hand, a vibrating handpiece (e.g., Patent Document 1) is superior to a rotary handpiece in non-invasiveness with respect to the affected area such as a gum during formation of a tooth surface.

JP 2004-351086 A

  However, the vibrating handpiece is inferior in cutting force to the rotary handpiece. In addition, since the cutting tip of the vibrating handpiece vibrates at the time of treatment, it is difficult to stably hold the tip of the tip at the treatment point. Therefore, during surgery with the vibratory handpiece, the operator directly fingers the periphery of the cutting tip for the purpose of eliminating the lack of cutting force and increasing the frictional force to the affected area and stably holding the treatment site. There is a case to cut by pressing. However, in the vibration-type handpiece, the cutting tip has a hook shape or the like, and the portion which the operator presses with a finger is narrow. Therefore, the cutting tip can not be sufficiently pressed, and the cutting force of the vibrating handpiece can not be increased. Further, in the vibration-type handpiece, the entire end portion of the cutting tip vibrates, and thus the vibration of the cutting tip may be affected by the finger touching the portion. That is, when the operator directly presses the vibrating end portion, the vibration is transmitted to the operator's finger and the operator feels uncomfortable, and the operator's finger may absorb the vibration and the cutting power may be reduced. is there.

  In view of the above situation, there is a need for a dental handpiece that can stably and safely increase the cutting force of the cutting tip.

  The characteristic configuration of the dental handpiece according to the present invention includes a handpiece body incorporating a vibration source, a cutting tip attached to the tip of the handpiece body, to which vibration from the vibration source is transmitted. A cylindrical cover body removably attached to the handpiece body and covering the cutting tip in a state in which the vibration of the vibration source is not transmitted; and the cover body is a base of the cutting tip There is a point which has the 1st cover part which covers, and the 2nd cover part which is continuously formed in the 1st cover part, and covers the end of the chip for cuttings.

According to this configuration, in the dental handpiece, the cover body covering the cutting tip is provided. Thus, the operator can operate the dental handpiece in a state in which the finger is in contact with the cover body, so that the cutting force of the cutting tip can be easily increased. In addition, since the cover that covers the cutting tip is attached to the handpiece body in a state in which the vibration of the vibration source is not transmitted, even if the operator's finger contacts the cover, the operator's finger Vibration is not transmitted. Therefore, the operator can operate the dental handpiece comfortably without being affected by the vibration of the cutting tip.
Furthermore, since the cover body is detachably attached to the handpiece body, it is possible to easily carry out the work of replacing the cutting tip, which is performed as needed.
In addition, the 1st cover part which covers the base of a cutting tip in a cover body is not specified as a cylinder which covers the whole base of a cutting tip over all the circumferences. For example, the first cover portion may have an opening portion so that a part of the entire circumference of the entire base of the cutting tip is exposed. In addition, the opening portion may be formed from the second cover portion to the first cover portion.

  Another feature is that the cover body is formed such that the second cover portion covers at least a side portion of the cutting tip farthest from the handpiece main body.

  According to this configuration, in the cover body, the second cover portion covers at least the side portion farthest from the handpiece body in the cutting tip. The said site | part is a position which opposes a handpiece main body on both sides of the chip | tip for cutting. Therefore, the position of the cutting tip can be stably held by the operator contacting the finger with the finger and causing the operator to cooperate with the handle of the handpiece body.

  Another characteristic configuration is that the cover body includes a finger placement unit on which the operator's finger can be placed on the second cover unit.

  According to this configuration, since the second cover that covers the end of the cutting tip includes the finger placement unit on which the operator's finger can be placed, the operator holds the second cover more stably. be able to. As a result, the operator can easily hold down the second cover with a finger, and the cutting force of the cutting tip can be easily improved.

  Another characteristic configuration is that the cover body is provided with a cutaway portion to which an end portion of the cutting tip can be inserted at an open end of the second cover portion.

  Even when the cover body is configured to be removable from the handpiece body, the cutting tip abuts on the cover body when removing only the cover body from the handpiece body while the cutting tip is attached to the handpiece body It may be difficult to carry out the removal work. In particular, since the second cover portion covers the end portion of the cutting tip, the second cover portion may abut on the cutting tip when removing the cover body from the handpiece main body. So, in this composition, a cover body equips an open end of the 2nd cover part with a notch which an end of a chip for cuttings can enter. Thereby, when removing a cover body from a handpiece main body, or when attaching a cover body to a handpiece main body, a contact with the end of a cutting tip can be avoided by the notch of the 2nd cover part. As a result, the cover body can be easily attached to and detached from the handpiece body.

  Another characteristic configuration is that, in the cover body, the second cover portion is formed so as to be raised relative to the first cover portion on the side opposite to the tip end side of the cutting tip.

  According to this configuration, the second cover portion of the cover body is formed so as to protrude relative to the first cover portion on the side opposite to the tip end side of the cutting tip, so the second cover portion and the cutting tip It is easy to form a clearance between the This facilitates the accommodation of the end portion of the cutting tip in the second cover portion.

It is a perspective view showing the holding | grip state of the dental handpiece of 1st Embodiment. It is a sectional side view of a dental handpiece. It is a sectional side view which shows the operation | movement which removes a cover body from a handpiece main body. It is a perspective view of a cover body. It is an exploded perspective view of a dental handpiece. It is a figure which shows the use condition of a dental handpiece. It is a figure which shows the use condition of a dental handpiece. It is a sectional side view of the dental hand piece of 2nd Embodiment. It is a perspective view which shows the cover body of another form. It is a perspective view which shows the cover body of another form. It is a perspective view which shows the cover body of another form. It is a sectional side view which shows another form of dental handpiece. It is a sectional side view which shows another form of dental handpiece. It is principal part sectional drawing of the dental handpiece of another form. It is a perspective view which shows the cover body of another form. It is a perspective view which shows the modification of a handpiece main body. It is principal part sectional drawing of the handpiece main body shown in FIG. It is a perspective view which shows the modification of a handpiece main body. It is principal part sectional drawing of the handpiece main body shown in FIG.

  Embodiments of the present invention will be described below based on the drawings.

  As shown in FIGS. 1 to 5, the dental handpiece 100 includes a handpiece body 1, a cutting tip 2, and a cover 3 that covers the cutting tip 2. The handpiece body 1 includes a grip for the operator to grip. The handpiece main body 1 incorporates a vibration source 10 for generating air or ultrasonic waves for vibrating the cutting tip 2. At the base end of the handpiece main body 1, a conduit or an electric cable for supplying air to the vibration source 10, and further, a flexible hose etc. bundling and containing a water injection conduit (all not shown) as necessary Is connected. The vibration transmission unit 11 is connected to the vibration generation source 10. At an end portion of the vibration transfer portion 11, an external thread portion 12 for connection to the cutting tip 2 is provided.

  The cutting tip 2 includes a tip base 21 (an example of a base) and a tip body 22 (an example of an end). A tip base 21 is attached to the tip of the handpiece main body 1. The tip base 21 includes a proximal end female screw portion 23 and a distal end fixing portion 24, and the female screw portion 23 is screwed and fixed to the male screw portion 12 at the tip of the handpiece body 1. The chip body 22 is detachably attached to the fixing portion 24. The chip base 21 can be separated from the handpiece main body 1 by loosening the female screw portion 23 when cleaning the chip base 21 itself, replacing it due to damage, or requiring any other maintenance.

  As shown in FIG. 1, when the vibration source 10 is activated with the cutting tip 2 attached to the handpiece body 1, the vibration generated by the vibration source 10 is transmitted to the tip body 22 through the tip base 21. Be done. Thereafter, by bringing the working surface of the tip body 22 into contact with the tooth surface to be cut, cutting of the tooth surface is performed by the contact of the working surface and the vibration action.

  The cover body 3 is detachably attached to the handpiece body 1 and covers the cutting tip 2 in a state where the vibration of the vibration source 10 is not transmitted. As shown in FIGS. 2 and 3, the end of the handpiece body 1 is provided with an engagement claw 1 a, and the inner surface of the first cover 31 of the cover 3 can be engaged with the engagement claw 1 a An engagement recess 31a is provided. The cover body 3 can be attached to and detached from the handpiece main body 1 by engaging and disengaging the engagement claw portion 1a with the engagement concave portion 31a. As shown in FIG. 3, the engagement / disengagement / disengagement of the engagement claw portion 1 a with the engagement concave portion 31 a is performed by operating the engagement claw portion 1 a with a finger or the like. The structure which makes the cover body 3 detachable with respect to the handpiece main body 1 is not limited to the engagement claw part 1a and the engagement recessed part 31a, Another structure may be sufficient.

  The cover body 3 is attached to the handpiece body 1 in a state of being separated from the vibration source 10, the vibration transmission unit 11, and the cutting tip 2. The cover 3 has a first cover 31 and a second cover 32. The first cover portion 31 covers the portion of the chip base 21 excluding the fixing portion 24 and the chip body 22, and the second cover portion 32 is continuously formed on the first cover portion 31 so that the fixing portion 24 of the chip base 21 is fixed. And the chip body 22. That is, the first cover 31 covers the base of the cutting tip 2 and the second cover 32 covers the end of the cutting tip 2. The second cover portion 32 is formed with a front cover portion 37 so as to cover at least a side portion of the cutting tip 2 farthest from the handpiece main body 1.

  As a result, the operator can operate the dental handpiece 100 in a state in which the finger is in contact with the second cover portion 32 of the cover body 3, so the cutting force of the cutting tip 2 can be easily increased. At the same time, the tip of the cutting tip can be stably held at the treatment site. In addition, since the cover body 3 covering the cutting tip 2 is attached to the handpiece main body 1 in a state in which the vibration of the vibration source 10 is not transmitted, the operator can see if the operator's finger contacts the cover body 3 The vibration of the vibration source 10 is not transmitted to the finger, and the cutting force does not decrease. Therefore, the operator can operate the dental handpiece 100 comfortably without being affected by the vibration of the cutting tip 2.

  As shown in FIGS. 4 and 5, the second cover portion 32 has an upper surface portion 33 and a side surface portion 34 including the front side cover portion 37, and the side surface portion 34 is formed in a cylindrical shape. In the second cover portion 32, an inclined portion 35 which is tapered toward the upper surface portion 33 is formed between the upper surface portion 33 and the side surface portion 34. In the second cover portion 32, a first notch 34a in the longitudinal direction is formed in the front cover portion 37 of the side surface portion 34, an opening 36a is formed in the opening end 36, and a hand is formed in the lower portion 38 of the second cover portion 32. A second notch 38a directed to the piece body 1 is formed (see FIG. 2). As shown in FIGS. 2 and 4, the first notch 34 a and the second notch 38 a are connected via an opening 36 a through which the chip body 22 is inserted. In addition, the first notch 34a, the opening 36a, and the second notch 38a are formed by one elongated hole which is continuous with the same width and has a width which allows the maximum diameter portion of the chip main body 22 to enter. It is done. Thus, the elongated holes (the first notch 34a, the opening 36a, and the second notch 38a) are formed in such a shape that the tip body 22 which is the end of the cutting tip 2 can enter. . Thereby, when removing the cover body 3 from the handpiece main body 1 or attaching the cover body 3 to the handpiece main body 1, the long holes (the first notch 34a, the opening 36a, and the like) of the second cover portion 32 The contact between the tip body 22 and the cover 3 can be avoided by the second notch 38a). As a result, attachment and detachment of the cover body 3 with respect to the handpiece main body 1 become easy.

  In the second cover portion 32, the upper surface portion 33, the side surface portion 34, and the inclined portion 35 are formed so that the operator's finger can be placed thereon. That is, the upper surface part 33, the side surface part 34, and the inclined part 35 can be used as the finger placement part 40 (refer FIG. 5). By providing the second cover unit 32 with the finger placement unit 40 on which the operator's finger can be placed, the operator can hold the second cover unit 32 more stably. As a result, the operator can easily hold down the second cover portion 32 with a finger, so that the cutting force of the cutting tip 2 can be easily improved and the tip of the cutting tip can be accurately positioned at the treatment site.

  Further, in the cover body 3, the second cover portion 32 is raised relative to the first cover portion 31 on the side opposite to the tip end side of the cutting tip 2 by the upper surface portion 33, the side surface portion 34 and the inclined portion 35. It is formed. Therefore, it is easy to form a clearance between the second cover portion 32 and the cutting tip 2. As a result, the second cover portion 32 facilitates the accommodation of the tip body 22 and the fixing portion 24 which are the end portions of the cutting tip 2, and the vibration of the cutting tip 2 is not transmitted to the second cover portion 32.

  6 and 7 show an example of a state in which the operator's finger is placed on the second cover portion 32. FIG. In FIG. 6, the tip end portion of the operator's finger is placed on the inclined portion 35 corresponding to the finger placement portion. In FIG. 7, the belly of the operator's finger is placed on the side surface portion 34 corresponding to the finger placement portion.

[Modification of cutting tip]
FIG. 8 shows a state in which a hook-shaped cutting tip 26 is directly attached to the handpiece body 1. The cutting tip 2 has an internal thread 27 at its base. The cover 3 has the same shape as the first embodiment described above. Thus, the cover 3 of the same shape can be used for cutting tips 2 and 26 of different shapes, and the number of parts of the dental handpiece 100 can be reduced.

[Modification of finger placement portion]
As shown in FIG. 9, in the finger placement unit 40, the second cover unit 32 may be formed into a prismatic shape, and may be configured by the side surface unit 34 thereof. In this case, it becomes easy to hold and hold the finger placement unit 40 with two fingers. As shown in FIG. 10, the finger placement unit 40 may be configured by providing a recess 39 at a location where the upper surface 33 and the side surface 34 of the second cover 32 intersect. It is preferable that the recess 39 be formed in a curved surface-shaped depression that conforms to the shape of the finger surface so as to ensure a wide contact area with the finger. By placing the operator's finger in such a recess 39, the action site of the tip body 22 can be more stably held in position.

[Another embodiment]
(1) In the above embodiment, an example in which the cover body 3 having the same shape is used for cutting chips 2 and 26 having different shapes has been described, but the dental handpiece 100 may be used for cutting chips 26 having different shapes. The cover 3 may have a different shape.

(2) In the above embodiment, in the cover body 3, the second cover portion 32 is formed to bulge on the side opposite to the tip side of the cutting tip 2, as shown in FIG. 11. Alternatively, in the cover body 3, the upper portion of the first cover portion 31 and the upper portion of the second cover portion 32 may be flush with each other.

(3) In the above embodiment, the second cover portion 32 has the first cutaway portion 34a in the front cover portion 37 with the opening portion 36a at the opening end 36 and the second cutaway portion 38a in the lower portion 38 Although the example which has it was shown, it may be the composition which provides only any one among the 1st notch 34a and the 2nd notch 38a. If the opening 36a of the second cover 32 does not come in contact with the end of the cutting chip 2, the second cover 32 is configured only with the opening 36a without the notches 34a and 38a. You may

(4) In the above embodiment, the handpiece body 1 has a gentle angle at the middle in the longitudinal direction. However, as shown in FIG. Good. In this case, the cutting tip 2 and the cover 3 are attached obliquely upward in the axial direction of the handpiece body 1.

(5) In the above embodiment, the first cover portion 31 of the cover body 3 covers the entire tip base 21 of the cutting tip 2 substantially over the entire circumference. The shape is not particularly limited. As shown in FIG. 13, in the first cover portion 31, for example, a part of the lower portion 38 may be cut away to form an opening 38 b. In the present embodiment, the opening 38b is cut out to be larger than the width in the short direction of the first notch 34a, the opening 36a, and the second notch 38a. As a result, most of the lower side of the chip base 21 of the cutting chip 2 is exposed by the opening 38 b. In the cover 3 shown in FIG. 13, an opening 38 b is formed from the front side of the second cover 32 to the first cover 31. The opening portion 38b may be formed in the shape of a long hole having the same width in the width direction as the opening 36a and the second notch 38a shown in FIGS. 4 and 7.

(6) As shown in FIG. 14, an elastic body 50 may be provided between the second cover portion 32 and the fixing portion 24 of the cutting tip 2. The elastic body 50 is made of rubber, a spring or the like. By interposing the elastic body 50, it is possible to easily press the tip body 22 against the affected part with the finger of the operator while suppressing the transmission of the vibration of the cutting tip 2 to the second cover portion 32. Thereby, the cutting force of the cutting tip 2 can be increased.

(7) As shown in FIG. 15, the cover body 3 may be constituted by two cover bodies 3a and 3b which can be divided into left and right sides in the longitudinal direction. By forming the cover body 3 so as to be divisible, the cover body 3 does not need a notch to which the end of the cutting tip 2 can enter.

(8) FIGS. 16 to 19 show another embodiment of the handpiece main body 1. The handpiece main body 1 shown in FIGS. 16 and 17 is formed in an inverted triangle in cross section, and has a protrusion 13 which can be held by the thumb and forefinger on the upper surface of the handpiece main body 1. The handpiece main body 1 shown in FIG. 18 and FIG. 19 has a recess 14 on the upper surface of which the forefinger of the operator can be placed. By thus configuring the handpiece body 1, the gripping force of the handpiece body 1 can be increased. As a result, the operability of the dental handpiece 100 is improved.

  The present invention can be widely used in dental handpieces having cutting tips of various shapes.

1: Handpiece body 2, 26: Cutting tip 3: Cover body 10: Vibration source 11: Vibration transmitting portion 21: Tip base 22: Tip body 31: First cover portion 32: Second cover portion 33: Upper surface portion (Finger placement unit)
34: Side part (finger placement part)
34a, 38a: Notched portion 35: Inclined portion (finger placement portion)
36: Opening end 37: Front cover portion 39: Recess (finger placement portion)
40: finger placement portion 50: elastic body 100: dental handpiece

Claims (5)

A handpiece body incorporating a vibration source,
A cutting tip attached to the end of the handpiece body to which vibration from the vibration source is transmitted;
And a cylindrical cover body removably attached to the handpiece body and covering the cutting tip in a state in which the vibration of the vibration source is not transmitted.
A dental handpiece comprising: a first cover portion covering a base of the cutting tip; and a second cover portion continuously formed on the first cover portion and covering an end portion of the cutting tip.   The dental handpiece according to claim 1, wherein the cover body is formed such that the second cover portion covers at least a side portion of the cutting tip farthest from the handpiece body.   The dental handpiece according to claim 1, wherein the cover body includes a finger placement portion on which the operator's finger can be placed on the second cover portion.   The dental handpiece according to any one of claims 1 to 3, wherein the cover body is provided with a cutaway portion to which an end portion of the cutting tip can enter at an open end of the second cover portion.   The said cover body WHEREIN: The side opposite to the front end side of the said cutting tip of the said 2nd cover part is protruded and formed with respect to the said 1st cover part in any one of Claim 1 to 4 Dental handpiece as described.

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