WO2022169098A1

WO2022169098A1 - Electric dental handpiece

Info

Publication number: WO2022169098A1
Application number: PCT/KR2021/019516
Authority: WO
Inventors: 최경구
Original assignee: (주)마이크로엔엑스
Priority date: 2021-02-05
Filing date: 2021-12-21
Publication date: 2022-08-11
Also published as: KR102516011B1; KR20220113101A

Abstract

Provided is an electric dental handpiece. To this end, the present invention comprises: a driving unit in which a light source and a driving force generated in a motor driving body inside a grip bar gripped by the hand are output forward from the grip bar; a connection unit for inducing the driving force forward from a lock bar of the driving unit in a state in which an optical fiber is protected by a connection cap that covers the lock bar; and a head unit in which a guide pipe for inducing the coupling of the lock bar to a lock body is formed on the outer circumferential surface of a head provided with a rotary shaft for outputting the force transmitted from the driving unit and a water injection pipe for spraying dental water, and a needle pipe for protecting the optical fiber is tightly assembled to the connection unit.

Description

Electric dental handpiece

The present invention relates to a handpiece used as a tool for dental treatment in dentistry, and in particular, for repairing a fixed part in the event of a breakdown, the coupling state of the driving force generating unit and the head has a structure that is easy to disassemble and assemble. It is about the handpiece for the dragon.

The dental handpiece may be divided into a head for treating teeth and a main body for an operator to hold and work with the handpiece, and may be provided in various types according to the treatment area and treatment method of the patient.

These dental handpieces are formed to have a certain angle for operator convenience and ease of treatment, and the head part has various shapes to fit the oral structure of the patient.

However, the dental handpiece was manufactured by manufacturing a plurality of parts by precision machining and then welding each other or using a separate complicated assembly member, as well as assembling it using a plurality of screws, but the problem that the assembly method is cumbersome and complicated there was.

Due to this, there is a problem in that there are too many machining operations, as well as a long processing time and an increase in the number of parts required for assembly, thereby increasing the unit price.

In particular, when the operator replaces some of the components of the dental handpiece, the process is complicated, there is a problem that the actual operator feels a great burden to directly replace the components of the dental handpiece.

Of course, there is a way to make the handpiece integrally formed to solve this problem, but this means that even if only some of the parts of the handpiece need to be replaced, the handpiece itself must be replaced or the parts must be replaced after being disassembled by a professional technician. There is another problem.

For the purpose of facilitating the handling of the handpiece, a device has been proposed in Registered Patent No. 10-1823923 (hereinafter referred to as the first name), which is as follows.

The prior invention relates to a driving unit for generating a driving force, a gear unit including a gear shaft-coupled to the driving unit, a head unit to which a burr for removing teeth is coupled based on the driving force transmitted through the gear unit, and the driving unit, the gear a main body including a plurality of connecting portions for connecting a portion and the head portion to each other; a housing that surrounds the outer surface of the main body so that the main body is protected from the outside; and a stopper provided to prevent the coupling between the housing and the main body from being released when the main body is inserted into the housing and coupled, wherein the housing and the main body are coupled to the main body in a state where the housing is coupled to the main body. Further comprising; a coupling member provided to additionally prevent disengagement, wherein the coupling member is image information for collecting image information about the tooth by photographing the tooth deleted by the burr or the tooth deleted by the burr Including;, the image information collecting unit is provided in the coupling member so that the burr faces the same direction as the direction in which the tooth is removed so as to photograph the tooth to be removed by the burr, and a plurality of the burrs are provided. collects multi-viewpoint image information of the tooth to be deleted, and the image information collecting unit includes a focal length for photographing the tooth and the tooth according to the position of the tooth to be deleted by the burr or the tooth to be deleted by the burr To change the shooting angle for photographing the teeth, to prevent damage in the process of removing the teeth, the main body and the housing are positioned inside the housing in a coupled state, and the housing includes the coupling member A plurality of coupling parts coupled by being inserted; includes, wherein the coupling member is formed to extend in a direction transverse to the longitudinal direction of the main body by being coupled to the head part and the other side being coupled to the driving part, the middle The support portion is formed to be bent to have a constant curvature; Located on one side of the support, a portion of the outer surface is formed to protrude in a direction opposite to the main body, and an opening groove is formed in the center of the protruding portion, the protruding portion is coupled to one of the coupling portions of the housing and a first protrusion in which the opening groove is coupled to one side of the support so that the coupling between the main body and the housing is maintained; and a second protrusion extending from the other outer surface of the support part and coupled to the other of the coupling parts to maintain the coupling between the main body and the housing; The portion is formed to be spaced apart from the outer surface of the main body by a certain distance, so that when an external pressure is applied to the first protrusion or the second protrusion to release the coupling between the housing and the main body, the spaced distance between the one side or the other side and the main body is narrowed so that the first protrusion or the second protrusion is separated from the coupling part, and the housing includes a first housing that protects the head and a part of the gear part, and a second housing that protects the other part of the gear part and the driving part. 2 housings are separately formed so that at least one of the first housing or the second housing is selectively separable, and external pressure is applied to the first protrusion or the second protrusion to release the coupling between the housing and the main body. When at least one of the first housing and the second housing is selectively separated while being applied, the first direction in which the first housing is separated is a direction from the gear part toward the head part, and the second housing is separated The second direction is a direction from the gear unit toward the driving unit, and is configured to be separated by sliding in different directions.

Such prior invention had a problem in that it was not easy to disassemble to repair the defective part because the assembly structure was complicated.

In addition, there is a problem in that, due to the structure that is organically connected to each other, if one part of the assembly target is broken, the entire assembled part has to be replaced.

The present invention provides robustness in an assembled state while simplifying the assembly structure of a handpiece used for the purpose of prosthetic treatment in dentistry.

In addition, if a malfunction occurs during use, hold the head part and the grip bar to check the faulty part and pull it in both directions to separate it immediately, making it possible to check and repair the faulty part, making it easy to use and disassemble. Its purpose is to lose it.

An electric dental handpiece is introduced.

To this end, the present invention provides a driving unit for outputting a driving force and a light source generated by a motor driving body inside a grip rest held by hand to the front of the grip rest; a connection part for guiding a driving force to the front of the lock part in a state in which the optical fiber is protected by the connection cap placed on the lock part of the driving part; A guide tube for guiding to be coupled with the lock body of the lock stand is formed on the outer periphery of a head provided with a rotation shaft transmitted and output from the driving unit and a water pipe through which water is sprayed, and a needle tube for protecting the optical fiber is formed in the connection part. head unit closely assembled; includes

The present invention simplifies the assembly structure of the handpiece and provides a solid state when assembling, and in case of a malfunction during use, it is separated by holding the head part and the grip bar and pulling force in both directions to deliver stable driving force and Since it is easily disassembled when disassembling, the repair of the handpiece can be made easily.

1 is a coupling state diagram of a dental handpiece to which the present invention is applied.

Figure 2 is a state in which the head is separated from the handpiece of the present invention.

Figure 3 is a state diagram in which the connection part and the driving part of the handpiece of the present invention are separated.

Figure 4 is a state of separation of the head portion and the connection portion in the present invention.

5 is an enlarged state diagram of the locking unit of the driving unit in the present invention.

Figure 6 is an excerpt of the lock body provided in the lock stand in the present invention.

Figure 7 is a state diagram of the lock groove for coupling the first ball ball of the first ball ball and the connecting cap in the present invention.

Specific embodiments in which the present invention may be practiced will be described with reference to the accompanying drawings illustrating examples.

Not only have these embodiments been described in sufficient detail to enable those skilled in the art to practice the present invention, it is to be understood that various embodiments of the present invention are different but not necessarily mutually exclusive.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily practice the present invention.

1 shows a coupled state of a dental handpiece to which the present invention is applied.

The handpiece 100 used for prosthetic treatment of a patient in dentistry is a motor actuator driven by an external power source and an LED lamp for supplying a light source inside a grip bar 110 having a diameter and length suitable for holding by hand. is provided, and the driving unit 200 that outputs the driving force and light source generated by the external power supply to the front of the grip rest 110 is formed.

One end of the driving unit 200 is protruded and extended forward to form the lock stand 210 .

The lock stand 210 serves to transmit the driving force and the light source to the side of the head unit 400 to be described later and to allow the head unit 400 to be assembled.

A connection cap 310 is formed on the lock stand 210 in order to secure its role.

The driving force generated inside the driving unit 200 is supplied through the shaft hole 211 of the lock stand 210, and when the LED built in a separate motor inside the driving unit 200 is turned on, the light source is locked by the optical fiber. It is supplied to the head unit 400 via the stand 210 .

As such, the optical fiber is safely protected by the connection cap 310 that is covered on the outside of the lock stand 210 so that the driving force and the light source are transmitted to the outside to stably transmit the driving force and the light source, and the driving force is the lock stand ( The connection part 300 that is delivered to the front of the 210 is formed.

The rotating shaft 460 from which the driving force transmitted from the motor driving body is output and the head 410 to which the light source is irradiated by the optical fiber is coupled to the lock body 230 of the lock stand 210 on the outer periphery of the head 410 A guide tube 420 to guide it is formed.

When the head part 400, in which the needle tube 350, which protects the optical fiber from the lock stand 210 to the head part 400, is closely assembled to the connection cap 310, malfunctions, a medical staff or a repair person can use the head part 400 ) and the grip stand 110 is a device that can efficiently perform after-sales service by a structure that is easily separated and combined.

2 shows a state in which the head part is separated from the handpiece of the present invention, FIG. 3 shows a state in which the connection part and the driving part of the handpiece of the present invention are separated, and FIG. 4 is a state in which the head part and the connection part are separated in the present invention. indicates

The lock bar 210 of the driving unit 200 extends the front of the grip bar 110 in a predetermined manner so that the driving force generated inside the grip bar 110 is transmitted in a stable state when output to the outside of the grip bar 110 . It is formed by extending and protruding in length.

The lock bar 210 protruding forward of the grip bar 110 has a shaft hole 211 for transmitting the driving force generated inside the drive unit 200 is formed inside the drive unit 200, and the outer surface is for milling operation. The plane is cut by the cutting surface 212 to be formed.

The shaft hole 211 of the lock stand 210 is a space for transmitting driving force, and the cutting surface 212 is a structural feature for protecting the optical fiber, and guide grooves on both sides of the cutting surface 212 to safely protect the optical fiber. (215) is formed concave.

The lock body 210 is provided with a lock body 230 on the outer periphery of the lock table 210 to ensure a safe coupling state when the head part 400 is coupled, and to facilitate separation.

That is, the lock body 230 has a ring groove 213 formed on the outer periphery of the lock stand 210 by cutting the cutting surface 212 in a planar shape to facilitate the coupling and separation of the head part 400 . and the first ball ball 232 and the second ball ball 234 are mounted around the ring groove 213 .

The first ball ball 232 is a structure for stable coupling of the connection cap 310 coupled to the lock stand 210, and is installed at one outer periphery of the lock stand 210 so that the spherical surface of the first ball ball 232 is the outer periphery. installed to protrude in the direction.

In addition, the second ball ball 234 is a structure for safe coupling with the head unit 400 and is installed in three places on the outer periphery of the lock stand 210 , and the inner spherical surface of the second ball ball is the shaft hole 211 of the lock stand 210 . It partially protrudes to the side, the outer spherical surface of the second ball ball protrudes from the outer periphery of the lock stand 210 , and the retainer 236 is installed to surround the outer diameter surface of the second ball ball 234 .

In addition, the C-ring 231 is coupled to the ring groove 213 so that the fitting assembly tolerance is formed on the outer periphery of the lock stand 210 by the diameter of the C-ring 231, so that the head part 400 is assembled when assembling. Due to the tolerance, a stable fitting assembly is formed.

The elastic force of the retainer 236 is applied to the outer surface of the second ball ball 234, and the second ball ball ( 234) will maintain the tightened state.

In addition, the head part 400 is provided with a guide tube 420 for coupling with the driving part 200 to the outer periphery of the head 410 from which the driving force and the light source are output.

A driving shaft 430 for receiving the driving force generated from the driving unit 200 is mounted inside the guide tube 420 so that it is engaged with the motor driving body of the driving unit 200, whereby the driving force passes through the locking unit 210 to the head It is transmitted to the rotation shaft 460 provided in the head 410 of the unit 400 .

On the outer periphery of the guide tube 420, a guide surface 424 having an inclined start end is formed to induce smooth assembly toward the second ball ball 234 of the lock body 230, and the guide tube 420 is located in the middle position. The second ball ball 234 is elastically engaged to form a ball ball groove 422 forming a locked state.

Figure 5 shows an enlarged state of the lock base of the driving unit in the present invention, Figure 6 shows the extracted state of the lock body provided in the lock stand in the present invention, Figure 7 is the first ball ball and connection cap of the lock stand in the present invention shows the state of the lock groove for coupling the first ball ball.

This will be described in detail as follows.

The C-ring 231 of the lock stand 210 provides a fitting assembly tolerance when the connection cap 310 of the connection part 300 to be described later is coupled with the lock stand 210 .

When the C-ring 231 of the lock stand 210 enters the lock hole 340 of the connection cap 310, it is inserted from the C-ring 231 to the fitting assembly tolerance value and immediately followed by the first ball ball 232 It is caught in the lock groove 342 formed in the lock hole 340 so that the connection cap 310 achieves a stable state in which it does not rotate left and right in the lock stand 210 .

In the coupling state of the connection cap 310 and the lock rod 210 , the positioning hole 330 formed at the tip of the connection cap 210 and the guide groove 215 formed in the cutting surface 212 of the lock rod 210 . In this state, the optical fiber to be described later is guided toward the head 410 side of the head unit 400 in a state where the positioning groove 330 and the guide groove 215 coincide with each other.

At this time, in order to prevent the thin optical fiber from being disconnected, the needle tube 350 made of metal and formed to be thin and long is fitted in the guide groove 215 formed on the cutting surface 212 of the lock stand 210 to be assembled.

Since the coupling of the connection cap 310 and the lock stand 210 is a simple coupling state, it is easily separated when disassembled for troubleshooting.

However, in the coupling of the connecting cap 310 and the locking rod 210 as described above, the guide tube 420 of the head 400 is inserted into the connecting cap 310 into the shaft hole 211 to lock the driving unit 200 . When it is coupled to the stand 210 , it is firmly coupled by the lock body 230 .

When the guide tube of the head part is inserted into the lock stand side of the driving part through the connection cap, a structure that forms a solid coupling state will be described as follows.

The head unit 400 includes a head 410 equipped with a rotating shaft 460 that allows the driving force transmitted from the driving unit 200 to be applied to prosthetic treatment and a water pipe 450 that provides water to the surgical site in the form of a spray; , in the configuration in which a guide tube 420 provided with a drive shaft 430 that is formed on the outer peripheral surface of the head 410 and engaged with the drive unit 200 through a connection cap 310 is formed, the head 410 has A guide hole 417 and a position pin 415 for guiding the optical fiber to connect to the head 410 are formed.

Therefore, when the guide tube 420 of the head portion 400 is assembled to the lock stand 210 side of the driving unit 200 , the guide tube 420 is passed through the shaft hole 320 of the connection cap 310 . Since the guide surface 424 formed at the tip of the guide tube 420 while being inserted into the shaft hole 211 of the lock stand 210 pushes the second ball ball 234 protruding into the shaft hole 211, the retainer ( 236 is in a state in which the second ball ball 234 is pressed with the elastic force generated while being opened.

When the lock groove 422 of the guide tube 420 reached the position of the second ball ball 234, the second ball ball 234 pushed into the lock groove 422 by the elastic force of the retainer 236 ( 234) enters at the same time in three places, so that the guide tube 420 of the head part 400 is fixed in the shaft hole 211 of the lock stand 210 and at the same time the shaft hole of the driving part 200 The drive shaft 430 of the guide tube 420 is stably coupled to the motor actuator in the 211 .

Since the fixing of the guide tube 420 is made in a state in which the connection cap 310 is covered with the outer diameter surface of the lock stand 210 where the retainer 236 is installed, the connection cap 310 surrounds the outer diameter surface of the retainer 236. Since it is in a state of restricting the flow of the second ball ball 234 in contact with the outer diameter surface of the guide pipe 420, a partial surface of the second ball ball 234 enters three lock grooves 422 of the guide pipe 420. Since the state is maintained, the coupled state of the head unit 400 is stably maintained in the driving unit 200 .

When the guide tube 420 is coupled to the connection cap 310 of the connection part 300 , the connection cap 310 is in a state of being hung on the first ball ball 232 installed on the bottom surface of the lock stand 210 , so it rotates left and right. The non-existent state is maintained.

The optical fiber installed near the head 410 of the head 400 is a needle tube 350 that is stably coupled to the head 410, the connection cap 310, and the guide groove 215 of the lock stand 210. is protected from

The handpiece 100 of the present invention as described above is used for prosthetic treatment in the assembled state as shown in FIG. 1 , and if an abnormality occurs during application, first hold the grip bar 110 with one hand and use the other hand for the head. If you hold the part 400 and apply a strong force to pull it in both directions, the second ball ball 234 of the lock body 230 caught in the lock groove 422 of the guide tube 420 is pushed out by the force and the locking state is released. to be separated from the shaft hole 211 of the lock stand 210 as shown in FIG. 2 .

When the guide tube 420 of the head unit 400 is separated as described above, the connection cap 310 of the connection unit 300 is also separated toward the front of the lock stand 210 of the driving unit 200, that is, the head unit 400 side. becomes the same as 3.

The assembly and separation of the handpiece as described above is stable with the structure of the ball ball, retainer, and lock groove of the guide tube without fixing elements such as screws, and is easily coupled and separated, so that it can be easily repaired in case of a malfunction.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments and may be manufactured in various different forms, and those of ordinary skill in the art to which the present invention pertains It will be understood that the present invention may be embodied in other specific forms without changing the spirit or essential features of the present invention.

Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims

a driving unit for outputting a driving force and a light source generated by a motor actuator inside the grip rest to the front of the grip rest;

a connection part for guiding a driving force to the front of the lock part in a state in which the optical fiber is protected by the connection cap placed on the lock part of the driving part;

A guide tube for guiding to be coupled with the lock body of the lock stand is formed on the outer periphery of a head provided with a rotation shaft transmitted and output from the driving unit and a water pipe through which water is sprayed, and a needle tube for protecting the optical fiber is formed in the connection part. head unit closely assembled; An electric dental handpiece that is easy to combine and detach, including:
According to claim 1,

The lock stand of the driving unit,

A second ball ball formed on the outer surface of the lock stand and fixed at a position where the guide tube of the head part inserted into the lock unit engages with the motor driving body of the grip stand, and a retainer surrounding the outer surface of the second ball ball are formed,

A first ball ball for in-place coupling of the connection cap is provided at a position opposite to the cutting surface by forming a guide groove of the guide tube by plane cutting the outer surface of the lock rod to form a cutting surface Electric dental handpiece that is easy to combine and detach.
According to claim 1,

The connection part,

It is a connecting cap installed between the head and the driving unit, and a lock groove for coupling the first ball ball of the lock unit is provided in the shaft hole on the side of the driving unit, and a positioning hole in which the needle tube is mounted on the shaft hole on the side of the head part. An easy-to-detach electric dental handpiece, characterized in that it is formed.
According to claim 2 or 3,

The head part,

A drive shaft coupled to the motor actuator of the driving unit is formed at the tip of the guide tube, a ball groove groove to which the second ball ball is coupled is formed in the guide tube, and a guide hole for inserting the needle tube and the connecting cap are formed in the head. A dental handpiece for easy coupling and separation, characterized in that a positioning protrusion to be coupled to the positioning hole is formed.
According to claim 2,

The lock body,

A retainer surrounding the second ball ball installed on the lock stand is installed, but the circumferential surface of the retainer is cut to have the same width as the cutting surface of the lock stand to form a C shape. peace.