JP2020054659A - Medical handpiece - Google Patents

Abstract

To provide a medical handpiece capable of properly directing a fiber tip to a treatment site and an observation site on the basis of the good operability and avoiding treatment and observation by an operator in an unnatural posture.SOLUTION: A medical handpiece 1 includes a fiber holding part 3 for holding a fiber 4 inserted into a body at its tip. The fiber holding part 3 is composed of the fiber 4, a first guide pipe 9 into which the fiber 4 is inserted, for slidably holding the fiber, and a second guide pipe 10 into which the first guide pipe 9 is inserted, for deformably holding the first guide pipe. The first guide pipe 9 is formed of a flexible soft resin material while the second guide pipe 10 is formed of a metal material or a hard resin material that can be curved or bent.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a medical handpiece, and more particularly, to a medical handpiece capable of accurately pointing a fiber tip to a treatment site or an observation site based on good operability.

  Background arts related to the present invention include, for example, a root canal endoscope disclosed in Japanese Patent Application Laid-Open No. 2004-65623 (Patent Document 1) and a Japanese Patent Application Laid-Open No. 2017-23504 (Patent Document 2). Laser handpieces and the like.

  That is, as disclosed in FIG. 1 and paragraph 0001 of Patent Document 1, the holding tube (the first guide pipe of the present application) is made of metal, hard resin material or soft resin material in a cap shape, The side is formed in a shape slightly curved in one direction.

  The holding tube may be hard or flexible depending on the material thereof.If the holding tube has flexibility, if it is desired to change the angle with respect to the handpiece by bending and deforming as necessary, the protection tube is provided. An external force was applied to the tip of the horn to bend and deform to change the angle.

  However, when an external force is applied from the outside, the protective tube repeatedly deforms and cannot be returned to the original state. In addition, there is a fear that the fiber in the protective tube is applied with an external force and the fiber is damaged. Further, even the inside of the protective tube is deformed, and the insertion of the fiber becomes impossible, and the tip of the fiber cannot be moved to a predetermined observation position.

  Further, in the laser handpiece disclosed in Patent Document 2, a cannula portion (first guide pipe of the present application) which is rotatably mounted and has a bent shape for bending the optical fiber tip in a desired direction by a rotation operation is described. However, the cannula portion is rotatable, but has a problem that the bending direction cannot be changed to any direction because the bending shape is predetermined.

JP-A-2004-65623 JP 2017-23504 A

  The problem to be solved by the present invention is that it is possible to accurately direct the fiber tip to a treatment site or an observation site based on good operability, and to avoid treatment observation with an unreasonable posture of the operator. It is an object of the present invention to provide a medical handpiece that can perform a medical treatment.

  The medical handpiece according to the present invention is a medical handpiece provided with a fiber holding portion for holding a fiber to be inserted into the body at the tip, wherein the fiber holding portion for holding the fiber at the tip is the fiber, A first guide pipe that inserts the fiber therein and slidably holds the fiber; and a second guide pipe that inserts the first guide pipe inside and deflectably holds the fiber, The most main feature is that the guide pipe is formed of a flexible soft resin material, and the second guide pipe is formed of a bendable or bendable metal material or a hard resin material.

  According to the first aspect of the present invention, the first guide pipe disperses an excessive force applied to the fiber tip and prevents the fiber from being damaged, and the first guide pipe passes through the first guide pipe according to the shape of the second guide pipe. It is possible to accurately position the fiber tip to the affected part by aiming, and to improve the operability when introducing the medical handpiece insertion part into the affected part such as in the root canal or periodontal pocket, In addition, it is possible to provide a medical handpiece that can prevent breakage of the fiber even if an excessive force is applied to the fiber tip, and that can avoid treatment observation in an unreasonable posture of the operator.

  According to the invention described in claim 2, in the invention described in claim 1, the rigidity of the fiber is smaller than the rigidity of the first guide pipe, and the rigidity of the first guide pipe is smaller than the rigidity of the second guide pipe. The structure is smaller than the guide pipe rigidity, so the rigidity of each of these elements is distributed in three stages, so that no excessive force is applied to the fiber and the fiber can be properly prevented from being damaged. A possible medical handpiece can be provided.

  According to the third aspect of the present invention, in the first or second aspect of the present invention, a second guide pipe having a different curved shape or bent shape can be arbitrarily selected and detachably attached to the first guide pipe. Therefore, it is possible to provide a medical handpiece that can select a second guide pipe having a bent shape suitable for an observation affected part or a treatment affected part, and can be easily attached and detached.

  In the case of employing only the second guide pipes having different curved shapes and bent shapes, the fiber is likely to be damaged at the time of replacement because the exposed portion of the fiber increases.

  According to the invention described in claim 4, in the invention described in any one of claims 1 to 3, the fiber is an image fiber having a lens at a front end and an imaging unit disposed at a rear end. A medical handpiece having the effects of the invention described in any one of Items 3 to 3 and capable of reliably photographing a target site of an affected part, such as in a root canal or a periodontal pocket, can be provided.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, since the fiber is a laser light irradiation fiber for guiding a laser light, a medical laser irradiation device, a dental A medical handpiece suitable for application to a laser irradiation device, a medical fiber illumination device, and the like can be provided.

FIG. 1 is a schematic plan view showing the overall configuration of the medical handpiece according to the embodiment of the present invention. FIG. 2 is a schematic perspective view of the medical handpiece according to the present embodiment, excluding a main body cover. FIG. 3 is a schematic front view of the medical handpiece according to the present embodiment, excluding the body cover. FIG. 4 is a schematic left side view of the medical handpiece according to the present embodiment, excluding the main body cover. FIG. 5 is an exploded view of the medical handpiece according to the present embodiment, excluding a main body cover, and a schematic explanatory view showing a spanner. FIG. 6 is a schematic enlarged sectional view of the medical handpiece according to the present embodiment, excluding the body cover. FIG. 7 is a schematic explanatory view showing an embodiment in which a USB unit is connected and added to the medical handpiece without the body cover according to the present embodiment. FIG. 8 shows a process of attaching the fiber and the fiber holding tube constituting the fiber holding portion to the medical handpiece body in the medical handpiece without the body cover according to the present embodiment, and the inside of the medical handpiece body of the fiber. It is explanatory drawing which shows the pull-in operation | movement. FIG. 9 is a process of attaching the fiber cover, the first guide pipe, and the second guide pipe to the fiber protruding from the medical handpiece main body in the medical handpiece without the main body cover according to the present embodiment. It is explanatory drawing which shows the form of the medical handpiece which attached the different 2nd guide pipe. FIG. 10 is an explanatory view showing a step of removing the second guide pipe, the first guide pipe, and the fiber cover in the medical handpiece without the body cover according to the present embodiment. FIG. 11 is an explanatory view showing an imaging step of the inside of the root canal in the medical handpiece without the body cover according to the present embodiment. FIG. 12 is an explanatory view showing a fiber storing step after completion of imaging of the inside of the root canal in the medical handpiece without the main body cover according to the present embodiment. FIG. 13 is a schematic cross-sectional view showing a medical handpiece without a main body cover according to a modification of the present embodiment.

  The present invention provides a medical handpiece capable of accurately pointing the fiber tip to a treatment site or an observation site based on good operability and avoiding treatment observation in an unreasonable posture of an operator. A medical handpiece provided with a fiber holding portion for holding a fiber to be inserted into the body at the distal end, wherein the fiber holding portion for holding the fiber at the distal end has the fiber and the fiber inside. And a second guide pipe that inserts and holds the first guide pipe so that the first guide pipe can be inserted and slidably contacted with the first guide pipe. The second guide pipe is formed of a bendable or bendable metal material or a hard resin material, and is formed of a flexible soft resin material. Is smaller than the rigidity of the first guide pipe, the rigidity of the first guide pipe, was achieved by the smaller structure than the rigidity of the second guide pipe.

  Hereinafter, a medical handpiece according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 6, the medical handpiece 1 according to the present embodiment includes a substantially cylindrical medical handpiece main body 2 formed to have an outer size that can be operated by an operator with one hand, and the medical handpiece. A fiber inserted into the patient's body provided at one end of the piece main body 2 (for example, an image fiber having a lens at the front end and a rear end facing an imaging surface of an imaging unit described later: the fiber diameter is, for example, about 0.44 mm) A fiber holding portion 3 for holding the fiber 4 so as to be able to enter and leave, a main body cover 11 that can be attached to and detached from the distal end side of the medical handpiece main body 2 so as to cover the fiber holding portion 3, and a fiber holding tube for holding the fiber 4 4a, which is a tool for attaching or detaching 4a. The body cover 11 is exchanged for each patient.

  The fiber 4 is held so that the rear end side thereof penetrates the fiber holding tube 4a and faces the end surface thereof, and this end surface is housed in the medical handpiece body 2 and is integrated with the fiber holding tube 4a. 5 so as to face the imaging surface.

  The fiber holding cylinder 4a has a prism 4b for the spanner 12 at one end thereof.

  Further, a transmission cable 6 for transmitting imaging information from the imaging unit 5 to the outside is connected to the rear end side of the imaging unit 5.

  An operation lever 7 is disposed on the outer peripheral portion of the medical handpiece body 2 so as to be slidable in the longitudinal direction of the medical handpiece body 2 and connected to the imaging unit 5. By operation. The imaging unit 5 and the fiber holding tube 4a are slid back and forth in the medical handpiece body 2, whereby the distal end side of the fiber 4 is configured to be able to enter and exit at the distal end side of the medical handpiece body 2. I have.

  The fiber holding section 3 includes the fiber 4 and the fiber holding tube 4 a, a fiber cover 8 attached to and disposed on the distal end side of the medical handpiece body 2 in a state of covering the distal end side of the fiber 4, and a fiber cover 8. And a first guide pipe 9 which is attached via a packing 9c and which inserts the fiber 4 therein so as to be slidably held therein, and inserts the first guide pipe 9 therein so as to be deformably held therein. And the second guide pipe 10.

  The first guide pipe 9 is formed of a flexible soft resin material, and is formed by integrally forming a fiber cover mounting cylinder 9a and a fiber penetration cylinder 9b.

  The second guide pipe 10 is formed of a bendable or bendable metal material or a hard resin material, and is configured in various shapes such as a straight cylindrical shape and a curved shape, and selects the second guide pipe 10 having a desired shape. By doing so, the first guide pipe 9 can be inserted into the fiber penetrating tubular portion 9b therein, and the first guide pipe 9 can be held linearly or curvedly.

  That is, FIG. 1 shows an example in which a second guide pipe 10 having a straight cylindrical shape is selected, the first guide pipe 9 is inserted into the inside, and the first guide pipe 9 is held linearly. 2 and 3 show an example in which a curved second guide pipe 10 is selected, the first guide pipe 9 is inserted into the inside, and the first guide pipe 9 is held in a curved shape.

  here. Referring to the magnitude relationship between the rigidity of the fiber 4, the first guide pipe 9 and the second guide pipe 10, the rigidity of the fiber 4 is smaller than the rigidity of the first guide pipe 9, and The rigidity of the guide pipe 9 is set to be smaller than the rigidity of the second guide pipe 10.

  As described above, the rigidity of the fiber 4, the first guide pipe 9 and the second guide pipe 10 is set to be distributed in three stages, so that no excessive force is applied to the fiber 4 during treatment, and the fiber 4 is damaged. Can be prevented.

  FIG. 7 shows a form in which a known USB unit 13 is added to the medical handpiece 1 without the main body cover 11 according to the present embodiment.

  The USB unit 13 has a USB housing 14 having a USB connector 15 connected to a USB slot of a personal computer (not shown) at one end, to which the transmission cable 6 is connected.

  Although not shown, an image processing board having a function of performing image processing and image storage processing of imaging information by the medical handpiece 1 is mounted in the USB housing 14.

  Next, referring to FIG. 8, a process of attaching the fiber 4 and the fiber holding tube 4 a constituting the fiber holding portion 3 to the medical handpiece main body 2 of the medical handpiece 1, The operation of pulling into the handpiece body 2 will be described.

  First, the operating lever 7 provided on the medical handpiece main body 2 is slid forward, and then the rear end side of the fiber holding cylinder 4a holding the fiber 4 is immersed in the medical handpiece main body 2 so that the fiber 4 Is positioned in a region near the distal end side of the medical handpiece body 2 and the prism 4b is slightly turned clockwise in this state.

  Next, the wrench 12 is fitted to the prism portion 4b, and the wrench 12 is turned in the direction of a right-hand screw and tightened.

  Thereby, the fiber holding cylinder 4 a holding the fiber 4 can be slidably disposed in the medical handpiece main body 2 in a state of being integrated with the imaging unit 5.

  8 shows the operation of pulling the fiber 4 into the medical handpiece body 2, and by sliding the operation lever 7 from the front to the rear, the fiber 4 is moved from the most protruded position to the most. It can be displaced to a position where it is drawn inside the medical handpiece body 2.

  Next, referring to FIG. 9, a process of attaching the fiber cover 8, the first guide pipe 9, and the second guide pipe 10 to the fiber 4 protruding from the medical handpiece main body 2 in the medical handpiece 1, The form of the medical handpiece 1 to which the second guide pipes 10 having different shapes are attached will be described.

  First, in a state where the fiber holding cylinder 4a that protrudes and holds the fiber 4 is slidably disposed in the medical handpiece main body 2, and the operation of the operation lever 7, the fiber 4 is most often used as the medical handpiece. In a state where the fiber cover 8 is displaced to a position where the fiber cover 8 is drawn into the inside of the main body 2, the fiber cover 8 is rotated and mounted on the distal end side of the medical handpiece main body 2 while penetrating the fiber 4.

  Next, the first guide pipe 9 is attached to the fiber cover 8 via a packing 9c by screwing the rear end side of the first guide pipe 9, that is, the fiber cover attachment cylinder 9a side, and the fiber penetration cylinder 9b is attached. At this time, the fiber 4 is inserted into the fiber penetrating tube 9b.

  Next, the second guide pipe 10 curved downward is fitted into the fiber penetration cylindrical portion 9b of the first guide pipe 9.

  By this. As shown in FIG. 9, a fiber holding section 3 holding the first guide pipe 9 in a downwardly curved shape can be arranged on the distal end side of the medical handpiece main body 2.

  The lowermost column in FIG. 9 shows the fiber holding section 3 that holds the first guide pipe 9 in a curved shape facing upward at the distal end side of the medical handpiece body 2.

  In this case, unlike the case described above, an example in which the second guide pipe 10 is formed so as to be curved upward is shown.

  The shape of the second guide pipe 10 can be selected from various shapes such as a straight cylindrical shape, a bent shape at 30 degrees, 45 degrees, 60 degrees, and the like, in addition to the above-described case, and is particularly limited. Does not do,

  Further, even when a kind of the second guide pipe 10 is used, the first guide pipe 9 can be formed by changing the fitting angle with respect to the first guide pipe 9 (downward, upward, right sideways, left sideways, etc.). Can be changed to a desired direction.

  Next, with reference to FIG. 10, a process of removing the second guide pipe 10, the first guide pipe 9, and the fiber cover 8 of the fiber holding portion 3 of the medical handpiece 1 from the medical handpiece body 2. explain.

  As shown in FIG. 10, when removing each element from a state where the fiber holding portion 3 is arranged on the distal end side of the medical handpiece main body 2, first, the second guide pipe 10 is connected to the first guide pipe. Remove from pipe 9.

  Next, the first guide pipe 9 is turned in the direction of the left-hand thread, and the first guide pipe 9 is detached from the fiber cover 8 together with the packing 9c.

  Next, the fiber cover 8 is turned in the direction of the left-hand thread, and the fiber cover 8 is detached from the distal end side of the medical handpiece body 2.

  Through the above steps, each element of the second guide pipe 10, the first guide pipe 9, and the fiber cover 8 of the fiber holding unit 3 can be easily removed from the medical handpiece body 2.

  Next, a photographing process inside the root canal opening 17 in the medical handpiece 1 of the present embodiment and a fiber storing process after the photographing is completed will be described with reference to FIGS.

  When taking an image of the inside of the root canal 17 of the tooth 16 of the patient, as shown in FIG. 11, for example, the distal end of the first guide pipe 9 of the medical handpiece 1 configured as shown in FIG. In this state, the operation lever 7 is slowly slid toward the distal end side of the medical handpiece body 2 so that the distal end of the fiber 4 is moved into the first guide pipe 9. From the root canal opening 17.

  In this state, an image of the inside of the root canal opening 17 is captured by the fiber 4 and the imaging unit 5.

  On the other hand, after the above-described photographing process, as shown in FIG. 12, the operation lever 7 is slowly slid toward the rear end side of the medical handpiece body 2 in a manner opposite to the above-described case, so that the fiber 4 Is returned into the first guide pipe 9, and thereafter the medical handpiece 1 itself is moved away from the area of the patient's teeth 16 and returned to a predetermined place.

  If foreign matter adheres to the distal end of the fiber 4 at the time of photographing the inside of the root canal opening 17, the distal end of the fiber 4 is wiped off with a cloth or the like moistened with a cleaning solution to prepare for the subsequent photographing.

  According to the medical handpiece 1 of the present embodiment described above, the following effects can be obtained.

  That is, according to the medical handpiece 1 of the present embodiment, the first guide pipe 9 disperses an excessive force applied to the distal end of the fiber 4 and prevents the fiber 4 from being damaged, and the shape of the second guide pipe 10 is reduced. Accordingly, the distal end of the fiber 4 can be accurately positioned to the affected part via the first guide pipe 9, and the medical handpiece can be inserted into the affected part, such as in a root canal or a periodontal pocket. The operability at the time of introduction of the portion is improved, and even if an excessive force is applied to the tip of the fiber 4, the damage of the fiber 4 can be prevented, and furthermore, the treatment observation with an unreasonable posture of the operator can be avoided. can do.

  Further, the rigidity of the fiber 4 is smaller than the rigidity of the first guide pipe 9, and the rigidity of the first guide pipe 9 is smaller than the rigidity of the second guide pipe 10. Because the rigidity of each of these elements is distributed in three stages. An unreasonable force is not applied to the fiber 4, and the fiber 4 can be prevented from being damaged.

  Further, since the second guide pipe 10 having a different curved shape or bent shape is arbitrarily selected and detachably attached to the first guide pipe 9, it is suitable for an observation affected part and a treatment affected part. It is possible to select the bent second guide pipe 10 and to easily attach and detach it.

  Furthermore, since the fiber 4 is an image fiber having a lens at the front end and an imaging unit 5 at the rear end, it is possible to reliably photograph a target site of an affected part, such as in a root canal or a periodontal pocket. it can.

(Modification)
Next, a medical handpiece 20 according to a modification of the above-described embodiment will be described with reference to FIG.

  In the medical handpiece 20 according to the modification shown in FIG. 13, the same elements as those in the case of the medical handpiece 1 according to the above-described embodiment are denoted by the same reference numerals.

  The medical handpiece 20 according to the modified example employs a laser beam irradiation type as a laser beam irradiation fiber as the optical fiber 43, and emits laser beam from a laser light source (not shown) as shown in FIG. A characteristic feature is that a fiber holding section 3A including an optical fiber 43 is disposed at the tip of the laser handpiece body 21 itself in a configuration substantially similar to that of the fiber holding section 3 described above.

  As the laser light source, for example, a laser light source using a semiconductor laser, a YAG laser, a carbon dioxide laser or the like is used.

  As shown in FIG. 13, a laser handpiece body 21 of the medical handpiece 20 has a substantially cylindrical handpiece head portion 22 and an inner portion of the handpiece head portion 22 from one end side thereof. With the arrangement ranging from the position to the vicinity of the other end side, and a substantially cylindrical optical fiber support 23 which is provided concentrically with the handpiece head portion 22, and the inside of the handpiece head portion 22, For example, stainless steel, which is concentrically arranged with the optical fiber support 23 and is arranged in series and integrally with the optical fiber support 23 in an arrangement located on the other end side of the optical fiber support 23 in a partially superposed structure. The inner peripheral portion is fixedly connected to the outer periphery of one end side of the optical fiber support 23, and the screw portion provided on the outer peripheral portion is connected to the handpiece light emitting connector receiving cylinder 24 made of A fixed connection cylinder 25 that is screwed to one end inner peripheral portion of the piece head portion 22 and fixedly arranges the optical fiber support member 23 and the handpiece light emitting connector receiving cylinder 24 in the handpiece head portion 22; In the optical fiber support 23, an inner thick portion 23 a provided at a position deviated inward from one end side is located at the center in the longitudinal direction of the optical fiber support 23, and in the longitudinal direction. And an in-body optical fiber holding tube 26 fitted with an in-body optical fiber 27 for guiding laser light from a laser light source (not shown) fitted in a receiving hole 23b provided over a predetermined size.

  In FIG. 13, reference numeral 25a denotes a circular projection integrated with the fixed connection cylinder 25.

  The handpiece light emitting connector receiving cylinder 24 is not limited to the stainless steel described above, but may be a metal made of a metal which can be processed with high precision and has little thermal deformation.

  The other ends of the optical fiber holding cylinder 26 and the optical fiber 27 in the main body are aligned with the opening end face on the other end side of the receiving hole 23b.

  The handpiece light emitting connector receiving cylinder 24 is provided in a range from a position near the opening end of the receiving hole 23b to a position near the other end of the handpiece head portion 22, and the other end side rotates the connector portion 42 described later in detail. A receiving cylinder portion 24a is provided to support as much as possible.

  Also, light is emitted from the other end of the optical fiber 27 in the main body to a space region close to the other end of the handpiece light emitting connector receiving cylinder 24 from the opening end face of the receiving hole 23b in the handpiece light emitting connector receiving cylinder 24. A first lens 28 that converts the laser light into parallel light and a second lens 29 that collects the parallel light from the first lens 28 at the focal position at a predetermined interval, and the outer peripheral portion of the first lens 28 receives the handpiece light emitting connector. It is arranged so as to be fitted into the tube 24.

  The receiving tube portion 24a has an optical fiber holding tube receiving hole 30 provided in a region corresponding to the focal position of the second lens 29, and details provided on an inner peripheral portion on the other end side of the optical fiber holding tube receiving hole 30. Is provided with a female screw 32 for screwing a connector portion 42 described later.

  Further, a space area on the second lens 29 side with respect to the optical fiber holding cylinder receiving hole 30 is a light condensing area 31 of the laser light from the second lens 29.

  A laser beam emitted from the other end of the in-body optical fiber 27 is provided between one end of the handpiece light emitting connector receiving cylinder 24 and an opening end face of the receiving hole 23 b provided in the optical fiber support 23. An auxiliary light guide cylinder portion 33 for guiding to the lens 28 is provided.

  A sterilizable material, for example, a polycarbonate material, which is screwed at one end to a female screw 32 of the handpiece light emitting connector receiving cylinder 24 that emits laser light provided on the handpiece head portion 22, is molded into a substantially cylindrical shape as a whole. Is arranged, and the fiber holding section 3A is detachably attached to the connector section 42.

Examples of the diameter size of the optical fiber 43 include 0.2 mm, 0.3 mm, and 0.4 mm.

  The connector portion 42 is formed by integrally molding a screwing tube portion 44 on one end side and a mounting receiving tube portion 45 on the other end side in such a state that they are connected to each other. A male screw 44a provided on the outer periphery is screwed to the female screw 32.

An optical fiber holding tube 47 made of, for example, ceramic and formed in a cylindrical shape is provided inside the screwing tube portion 44.

  The optical fiber holding cylinder 47 holds a predetermined dimension of one end of the optical fiber 43 in the through hole 46 by using an adhesive.

  Further, an outer peripheral portion of the optical fiber holding tube 47 is fixed to an inner wall portion of the screwing tube portion 44 using an adhesive, and the optical fiber holding tube 47 is interlocked with a displacement of the screwing tube portion 44 during a rotation operation. Like that.

  The end face of one end of the optical fiber 43 matches the end face of one end of the optical fiber holding tube 47.

  Further, the fiber holding portion 3A of the modified example is attached to the screwing tube portion 44, and the other end of the optical fiber 43 is inserted into the first guide pipe 9 of the fiber holding portion 3A to a position near the tip thereof. The tip of the optical fiber 43 is set to a desired shape through the first guide pipe 9 by the shape (straight cylindrical shape, curved shape, bent shape, etc.) of the second guide pipe 10 into which the first guide pipe 9 is inserted. It is configured to face in the direction. The first guide pipe 9 is formed of a flexible soft resin material. Further, the optical fiber 4 is configured to be able to protrude outward from the tip of the first guide pipe 9.

  That is, in the medical handpiece 20 according to the modified example, the tip of the optical fiber 43 can be moved in and out of the tip of the first guide pipe 9 by rotating the screwing tube part 44, and the second guide pipe can be moved. By changing the direction of the distal end of the optical fiber 43 through the first guide pipe 9 according to the difference in the shape of the laser beam 10, the medical handpiece 20 irradiates a laser beam in a desired direction inside the root canal 17 with the medical handpiece 20. Accordingly, the inside of the root canal opening 17 can be observed using the medical handpiece 20.

  According to the modified example, a laser beam irradiating fiber for guiding a laser beam is employed as the optical fiber 43 instead of the fiber 4, so that a medical laser irradiating device, a dental laser irradiating device, and a medical fiber type lighting device are used. A medical handpiece 20 suitable for application to a device or the like can be provided.

  The medical handpiece of the present invention includes a dental root canal endoscope, a periodontal pocket endoscope, a medical endoscope, a medical laser irradiation device, a dental laser irradiation device, and a medical fiber type lighting device. As widely applicable.

DESCRIPTION OF SYMBOLS 1 Medical handpiece 2 Medical handpiece main body 3 Fiber holding part 3A Fiber holding part 4 Fiber 4a Fiber holding cylinder 4b Prismatic part 5 Imaging part 6 Transmission cable 7 Operating lever 8 Fiber cover 9 First guide pipe 9a For fiber cover Mounting tube part 9b Fiber penetration tube part 9c Packing 10 Second guide pipe 11 Main body cover 12 Spanner 13 USB unit 14 USB housing 15 USB connector 16 Teeth 17 Root canal opening 20 Medical handpiece 21 Laser handpiece body 22 Handpiece head Part 23 Optical fiber support 23a Internal thick part 23b Receiving hole 24 Handpiece light emitting connector receiving cylinder 24a Receiving cylinder part 25 Fixed connection cylinder 26 Internal optical fiber holding cylinder 27 Internal optical fiber 28 Lens 29 and the second lens 30 optical fiber holding cylinder receiving hole 31 converging region 32 female thread 33 light auxiliary cylinder part 42 connector portion 43 optical fiber 44 screwed cylindrical portion 44a male screw 45 mounted receiver cylindrical portion 46 through hole 47 the optical fiber holding cylinder

Claims (5)

A medical handpiece including a fiber holding portion that holds a fiber to be inserted into a body at a distal end thereof,
A fiber holding unit that holds the fiber at the tip,
Said fiber;
A first guide pipe that holds the fiber so as to be slidable therethrough,
A second guide pipe that inserts the first guide pipe therein and holds the first guide pipe so as to be deformable,
The first guide pipe is formed of a flexible soft resin material, and the second guide pipe is formed of a bendable or bendable metal material or a hard resin material. .   The medical device according to claim 1, wherein the rigidity of the fiber is smaller than the rigidity of the first guide pipe, and the rigidity of the first guide pipe is smaller than the rigidity of the second guide pipe. Handpiece.   The medical handpiece according to claim 1, wherein a second guide pipe having a different curved shape or bent shape is arbitrarily selected and detachable from the first guide pipe.   The medical handpiece according to any one of claims 1 to 3, wherein the fiber is an image fiber having a lens at a front end and an imaging unit disposed at a rear end.   The medical handpiece according to any one of claims 1 to 4, wherein the fiber is a laser light irradiation fiber for guiding laser light.

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