KR101179913B1 - A prophy angle for dental tool and prophy angle assembly - Google Patents

Abstract

An open cutout is formed to mount the drive and driven shaft in a housing that is accommodated so that the drive shaft and the driven shaft are rotated about the first and second axes intersecting each other in a state where the drive shaft and the driven shaft are geared to each other and cover the cutout. Disclosed is a prophylactic angle for a dental appliance, characterized in that it comprises a cover member, and according to the disclosed profi angle, the overall length of the housing can be reduced, the mounting of the drive shaft and the driven shaft is easy, and the productivity of the product is improved. Of course, there is an advantage to increase the reliability of the product by fundamentally preventing the departure to the outside of the housing.

Dental, prop angle, housing, drive shaft, driven shaft, gear, cup, brush

Description

PROPHY ANGLE FOR DENTAL TOOL AND PROPHY ANGLE ASSEMBLY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prophylactic angle for dental instruments, and relates to a prophylactic angle and propangle assembly for dental instruments coupled to a prophy cup, a brush, and the like, used for teeth polishing.

As part of dental hygiene, patients regularly visit the dentist and receive cleaning treatment from specialists. At the time of cleaning treatment, the dental calculus is polished and removed by an expert to maintain a healthy dental condition.

Polishing is accomplished by applying a profiled lactic polishing paste to the teeth using a small rubber cup called a so-called propi cup. The propiphy cup is filled or loaded with propyllactic polishing paste, which is held in contact with the surface of the tooth while the cup is mechanically rotated.

The cup is attached to a dental angle called a profile locks (propie) angle and is rotated under rotational force. That is, the dental angle (hereinafter referred to as a propie angle) is connected to a dental rotary handpiece to receive rotational power, and serves to transfer the received rotational power to a cup or brush.

1 is a view showing a conventional prop angle disclosed in Korean Patent Laid-Open No. 2001-0013866. Referring to FIG. 1, a conventional prop angle includes a housing 10, a drive shaft 20 inserted and rotated in a first axial direction 11 in the housing 10, and a first shaft in the housing 10. And a driven shaft 30 which is installed to be driven to rotate about the second axial direction 12 intersecting the direction 11.

One end 13 of the housing 10 is connected to the dental handpiece (not shown) is coupled so that the drive shaft 20 can receive power. The driving shaft 20 is inserted in the first axial direction 11 through one end 13 of the housing 10 and accommodated in the housing 10.

And the other end portion 14 of the housing 10 is coupled to the driven shaft 30 is inserted in the second axial direction 12 so that the driven shaft 30 is driven and driven. Each of the drive shaft 20 and the driven shaft 30 is provided with cam surfaces in contact with each other, so that the rotational force of the drive shaft 20 is transmitted to the driven shaft 30 through the cam surfaces.

Further, in addition to the method of transmitting the power of the drive shaft 20 to the driven shaft 30 through the cam surfaces as described above, a method of transmitting power by forming a gear to each other is also widely used.

In addition, a latch member 15 is coupled to the housing 10 to prevent the driving shaft 20 from being separated from the housing 10 in the first axial direction 11, and the latch member 15 is connected to the driving shaft 20. A stop flange interfering with 15) is formed.

A coupler 31 is formed at an end exposed to the outside of the driven shaft 30 so that the cup or brush described above can be coupled.

According to the above configuration, the housing 10 is manufactured by injection molding, and the housing 10 must be manufactured to a sufficient length so that the drive shaft 20 can be rotated while being stably supported. Therefore, the size (length) of the core, the mold, etc. for forming the space inside the housing 10 is long, there is a problem that the productivity is lowered, the injection time increases accordingly.

In addition, in order to prevent the drive shaft 20 installed in the housing 10 from falling out, the latch member 15 must be manufactured and installed separately, thereby increasing the complexity of the product and, of course, the housing 10. There is a problem that the injection molding operation is complicated.

In addition, the driven shaft 30 is inserted into and coupled to the second shaft direction 12 through the opening 14a of the other end 14 of the housing 10 and connected to the driving shaft 20. The coupling force to the housing 10 of the 30 is not strong, and there is a problem that an accident in which the driven shaft 30 is separated from the housing 10 often occurs during use.

In addition, since the coupling position of the driven shaft 30 with respect to the housing 10 is not stable, and the drive shaft 20 is also suppressed from the outside by the latch member 15, the drive shaft 20 is substantially reduced. ) And the coupling force (contact between cam surfaces or bite between gears) between the driven shaft 30 is not accurate and there is a problem that the rotational force is not stably transmitted to the moving shaft 30.

The present invention has been made in view of the above-mentioned, it is easy to produce and assemble, and to provide a dental propie angle improved and the coupling state of the drive shaft and the driven shaft and a propie angle assembly having the same There is this.

Dental prophylactic angle of the present invention for achieving the above object, the drive shaft having a drive gear portion formed to extend on one end of the shaft body, the drive shaft is rotatably installed with respect to the first axis; A driven shaft having a driven gear part connected to the drive gear part, the driven shaft being rotated about a second axis intersecting the first axis, and having a dental cup or brush coupled to an externally exposed part; And a housing in which the driving shaft and the driven shaft are rotatably accommodated in a state in which the driving shaft and the driven shaft cross each other.

The housing is formed so as to communicate from one end of the opening to the other end of the shaft fastener, the housing body having a cutout for opening a portion of the front end portion adjacent to the shaft fastener is cut open; And a cover member coupled to cover the cutout to maintain the driving shaft and the driven shaft mounted in the housing while the driving shaft and the driven shaft are mounted in the housing body through the cutout. It is characterized by.

Here, the housing body is connected to each other in parallel with the first shaft is formed, having a different inner diameter housing portion and the neck receiving the drive shaft therein; And a bent portion extending from the neck portion in the second axial direction to receive the driven shaft therein, wherein the cut portion is formed from the neck portion to the bent portion.

In addition, the inside of the housing body, the stopper rib for blocking the movement of the drive shaft inserted and mounted through the incision to the opening; And support ribs formed to be spaced apart from the stopper rib so as to contact and support the outer circumferential surface of the drive gear part of the drive shaft.

In addition, an end portion of the bent portion is reduced in diameter to form a coupling rib for supporting the driven shaft, wherein the driven shaft includes a driven gear portion geared to the drive gear portion and exposed to the outside of the housing or the brush or the like. It is preferable to have a coupler to which a cup is coupled, and a coupling portion which is formed to be stepped in an annular step between the driven gear portion and the coupler and coupled to the coupling rib.

In addition, it is preferable that the inside of the cutout and the cover member are respectively provided with a locking part and a locking hook which are locked to each other.

In addition, the outer ring of the bent portion of the cover member and the housing body is provided with a ring engaging portion formed in an annular shape, it is preferable to further include a coupling ring which is inserted into the ring coupling portion to wrap and support the cover member and the housing body. .

In addition, the propie angle assembly of the present invention for achieving the above object,

A drive shaft having a drive gear portion formed to extend at one end of the shaft body, the drive shaft being rotatably installed with respect to the first axis; A driven shaft having a driven gear part connected to the drive gear part, the driven shaft being rotated about a second axis intersecting the first axis, and having a dental cup or brush coupled to an externally exposed part; And a housing that is rotatably received in a state in which the drive shaft and the driven shaft are geared in a direction crossing each other, wherein the housing is formed to communicate from one end of the opening to the other end of the shaft fastener. A housing body having a cutout portion in which a portion of the tip portion adjacent to the sphere is cut open to open the inside; And a cover member coupled to cover the cutout to maintain the driving shaft and the driven shaft mounted in the housing while the driving shaft and the driven shaft are mounted in the housing body through the cutout. Pro-angle for dental instruments, characterized in that;

And a dental cup or brush coupled to an end exposed to the outside of the housing body of the driven shaft.

In addition, a dental cup is coupled to the driven shaft, and the dental cup is extended at its end in a trumpet shape, and four protrusions are formed to be symmetrically protruded from each other, and torn about the inner circumferential surface of the cup. It is preferably formed partially spaced apart.

According to the dental propie angle and propie angle assembly of the present invention, by having a housing having a incision and a housing body and a cover member, the drive shaft and the driven shaft can be easily mounted in the housing through the open incision; After mounting, it is possible to mount the cover member so as not to be separated out by combining with the housing body.

Therefore, since the drive shaft and the driven shaft can be prevented from being detached from the housing as in the prior art, it is not necessary to add the same configuration as the conventional latch member, thereby facilitating the production of the product and shortening the production time. There is an economic advantage.

In addition, it is possible to accurately determine the mounting position of the drive shaft and the driven shaft and mount it in a stable state, and the gear connection of the drive shaft and the driven shaft can be made and maintained accurately, thereby reducing the defective rate of the product and increasing the reliability of the product. have.

In addition, by forming a coupling rib at the end of the bent portion of the housing body it is possible to form a coupling portion for coupling between the driven shaft so as not to fall out, that is, between the coupler and the driven gear portion. Therefore, it is not necessary to form ribs or grooves to prevent the departure from the tip of the driven shaft, there is an advantage that the design for the connection of the driven gear and the drive gear is free, the production and assembly of the product is easy.

Hereinafter, a dental propie angle and a propie angle assembly according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2A, 2B, 3, 4, 5, and 6, the dental propie angle according to an embodiment of the present invention, the housing 100 is formed to communicate from one end to the other end, and the housing A driving shaft 200 rotatably installed around the first axis X in the interior of the center 100 and a second axis Y crossing the first axis X in the housing 100. It is provided with a driven shaft 300 rotatably installed.

The housing 100 includes a housing body 110 and a cover member 120 coupled to cover an open portion (hereinafter, referred to as a 'cutting portion') of the front end of the housing body 110.

The housing body 110 has a structure formed in communication with one end of the opening 101 from the other end of the shaft fastener 102, the housing portion 111 from the opening 101 to the shaft fastener 102, The neck 112 and the bent portion 113 may be divided. The housing 111 is formed to have a larger diameter than the neck 112, and the boundary with the neck 112 is tapered.

The neck portion 112 is formed between the housing portion 111 and the bent portion 113 and is formed in a pipe shape of a predetermined length. Inside the neck 112, a stopper rib 112a is formed to protrude from the inner circumferential surface to restrict the driving shaft 200 from being moved toward the opening 101. In addition, the support rib 112b is formed to protrude in an annular shape from the inner circumference of the neck 112 at a position spaced apart from the stopper rib 112a by a predetermined distance. The support rib 112b is formed to protrude to a lower height than the stopper rib 112a to support the outer circumference of the drive gear portion 210 of the drive shaft 200 to be described later, so that the entire outer circumferential surface of the drive gear portion 210 is housed. ) It can be rotated stably without touching the inner surface and in contact with the minimum contact surface.

The bent portion 113 is bent at a predetermined angle in the neck 112 is formed to communicate. At the end of the bend 113, that is, the shaft fastener 102, a coupling rib 113a is rotatably coupled to the driven shaft 300. The coupling rib 113a is formed by reducing the inner diameter of the bent portion 113 at the end of the bent portion 113.

In the housing body 110 having the configuration as described above, the incision portion to open the inside of the housing body 110 by cutting a portion from the front end of the housing body 100, that is, from the neck 112 to the bent portion 113 115 is formed. The inside of the housing body 110 may be opened to the outside through the cutout 115. The drive shaft 200 and the driven shaft 300 can be easily mounted inside the housing body 110 through the open cutout 115. That is, in the case of the drive shaft 200, the insertion shaft 115 may be inserted from one end portion 221 of the drive shaft 200 through the open cutout 115 as shown in FIG. In this case, the drive gear 210 formed at the tip of the drive shaft 200 may be mounted to be caught by the stopper rib 112a. Therefore, as described above with reference to FIG. 1, the conventional latch member 15 does not need to be installed in the housing 100, so that the manufacturing of the housing 100 is easy and the number of parts can be reduced.

In addition, even if the overall length of the housing body 110 is shorter than in the related art, since the drive shaft 200 can be supported to be rotated in a stable state, a work process for injection molding the housing body 110 is simple. This has the advantage that the time can be shortened.

In addition, the driven shaft 300 is easily mounted to the bent portion 113 through the open cutout 115, but is mounted to be caught by the coupling ribs 113a so that the driven shaft 300 is housed ( It is possible to fundamentally prevent separation in 100).

In addition, there is no need to form the coupling portion 330 on the distal end shaft 340 of the driven shaft 300 so that the driven shaft 300 does not fall out of the housing 100, thereby driving the driver of the drive shaft 200. There is an advantage in that the gear connection between the fisherman 210 and the driven gear 310 of the driven shaft 300 can be more accurately and stably maintained.

The cutout 115 may be opened and closed by the cover member 120, and a locking part 130 may be formed inside the housing body 110 to which the cover member 120 may be fastened in a so-called one-touch manner. . The locking part 130 has a locking protrusion 131 formed on the inner side of the neck 112. The locking protrusion 131 is formed to correspond to the pair inside the neck 112, respectively.

In addition, the bent portion 113 is bent extending in a cylindrical shape so as to cross a predetermined angle in the neck portion 112, the coupling rib 113a is formed at the end. And the outer side of the bent portion 113 is formed so that the ring engaging portion 113b is drawn in an annular shape on the outer circumferential surface. The ring coupling portion 113b is seated and coupled to the coupling ring 400 for tightly wrapping the cover member 120 and the housing body 110.

The cover member 120 is complementarily coupled to the cutout 115 to cover and close the open cutout 115. As shown in FIG. 4, the cover member 120 is formed to protrude from one end of the body 121 and an approximately semi-cylindrical body symmetrically to the incision 115, and the neck 112. It has a locking rib 122 is inserted into the inner side of the coupling ribs 123 formed to the side of the other end of the body 121 so as to correspond to the coupling ribs 113a of the bent portion 113 to maintain a stable coupling state. .

In addition, the body 121 has a plurality of locking hooks 124 that are locked to the locking portion 130 when coupled to the cutout 115. Therefore, when the cover member 120 is coupled to the cutout 115, the locking rib 122 is first inserted into the inner side 115a (see FIG. 3) of the neck 112 of the cutout 115. When the 120 is pressed, the locking hooks 124 are respectively locked to the locking unit 130 in one-touch manners.

The opposite end of the locking rib 122 of the cover member 120 is firmly coupled to the housing body 110 by a coupling ring 400.

In addition, a support rib 126 corresponding to the support rib 112b formed at the inner circumference of the neck 112 is formed in an annular shape on the inner surface of the body 121, and the bending is also performed on the outer surface of the coupling rib 123. The ring coupling portion 125 corresponding to the ring coupling portion 113b formed at the end of the portion 113 is formed in a ring shape.

In addition, each of the housing body 110 and the cover member 120 has a positioning protrusion 118 and a positioning groove 128 for determining a coupling position therebetween.

The drive shaft 200 is predetermined from the drive gear 210 to the drive gear part 210 formed at the tip, and the shaft body 220 and the shaft body 220 which are coaxially connected at the center of the drive gear part 210. Expansion ribs 230 are formed to be spaced apart from each other.

The drive shaft 200 is inserted into the housing body 110 through the cutout 115 from the one end 221 of the shaft body 220 and is mounted therein, wherein the drive gear 210 is the stopper rib. It is caught by (112a) and seated in contact support with the support rib (112b). A bevel gear 211 is formed at the end of the drive gear 210. The expansion rib 230 is inserted into the cutout 115 of the neck 112 and supported by the inner circumferential surface of the neck 112 to support the entire drive shaft 200 so that the center can be stably rotated without shaking. Play a role.

The driven shaft 300 is connected to the driven gear 310 which is inserted and seated inside the bent portion 113 of the housing body 110, and is connected to the driven gear 310 to the outside of the housing body 110. It has a coupler 320 exposed to support the cup 500, a coupling portion 330 formed between the driven gear 310 and the coupler 320, and a shaft 340 at the tip of the driven gear 310. .

The driven gear 310 is formed with a bevel gear 311 that is geared to the bevel gear 211 of the drive gear 210. The driven gear 310 is stably seated in the bent portion 113 inside the housing body 110 and accommodated therein.

The coupler 320 may be exposed to the outside of the front end of the housing 100 to support the brush or cup 500 not shown, as shown in FIGS. 2A and 2B. In addition, the coupling part 330 is stepped in an annular groove shape between the driven gear 310 and the coupler 320 and fitted into the coupling rib 113a at the tip of the housing body 110. By forming the coupling portion 330 at a position corresponding to the coupling rib 113a in this way, the configuration for preventing the driven shaft 300 from being separated from the housing 100 does not have to be formed on the shaft 340. It is possible to naturally maintain the gear connection of the bevel gear 311 of the driven gear 310 and the bevel gear 211 of the drive gear 210, the gear connection angle between the drive gear 210 and the driven gear 310 Since it can be designed freely, there is an advantage that the design, manufacture and assembly of the product is easy.

In addition, since the driven shaft 300 can be mounted inside the bent portion 113 as shown in FIG. 3 while the cutout 115 is opened, the driven shaft 300 can be stably mounted. Since it is possible to fundamentally prevent falling in the direction of the second axis (Y) in the housing 100 there is an advantage that can be safely and conveniently dental treatment by fundamentally preventing the problem of separation of the product during dental treatment.

The prophylactic angle for dental instruments according to the embodiment of the present invention having the above configuration, the housing 100 has a configuration consisting of the housing body 110 and the cover member 120, the drive shaft in the interior of the housing 100 It is easy to mount the 200 and the driven shaft 300, and the configuration for maintaining the mounting position of each shaft (200,300) can be formed integrally during the injection molding of the housing 100, thereby reducing the number of parts Of course, there is an advantage that it is easy to manufacture.

In addition, since the drive shaft 200 is stably mounted in the housing 100 and can be supported to be rotated in a stable state, the entire length of the housing 100 may be increased for stable mounting of the drive shaft 200. There is no need, and since it is manufactured to a minimum length, the length of the core used in injection molding can be reduced, and molding time can be reduced, thereby improving productivity.

In addition, since it is possible to integrally mold the stopper rib 112a inside the housing 100 so that the driving shaft 200 does not fall out of the housing 100, a separate latch member and a latch member may be inserted as in the related art. Since there is no need to provide a hole or the like separately, there is an advantage that can reduce the production time and the production cost accordingly.

In addition, by mounting the drive shaft 200 and the driven shaft 300 through the open cutout 115 of the housing 100, it is possible to accurately maintain the mounting position, gears 210,310 of each shaft (200,300) ) Can be connected correctly. Therefore, it is possible to improve the reliability of the product by reducing the defective rate, so that the power transmission from the drive shaft 200 to the driven shaft 300 is made smoothly.

In addition, since the driven shaft 300 may be mounted inside the housing 100 through the open cutout 115, the driven shaft 300 may be formed in the housing 100 after the cover member 120 is coupled. It can be mounted so as not to fall in the two-axis (Y) direction, it can be maintained in a stable mounting position can be driven to rotate. Therefore, since the driven shaft 300 can be prevented from being separated from the housing 100 during dental treatment, safe dental treatment is possible.

Meanwhile, FIGS. 7 and 8 each show a propie angle assembly comprising a cup 500 and a brush 600 supported by the cup 500 in the structure of the propie angle 100 as shown in FIG. 2B. Drawing. That is, as shown in FIGS. 9A and 9B, four protrusions 510 are formed symmetrically with each other inside the cup 500. The end of the protrusion 510 has a structure that is torn about 1 to 2 mm apart from the inner surface of the cup 500 by a predetermined distance, so that it is easy to adhere to the teeth when the cup 500 is rotated and the polishing effect is increased. There is this.

10 and 11 are diagrams illustrating a propie angle assembly according to another embodiment of the present invention, in which a cup 500 'or 500 "of another type is coupled to and supported by the propie angle 100. FIG. The figure which shows.

In addition, as shown in FIG. 12, it is obvious that various types of polishing brushes and cups may be employed. Thus, in the case of the present invention, it can be understood that all are applicable regardless of the shape or size of the polishing brush and the cup.

In addition, as shown in FIG. 2B 3 and the like, in the state in which the cover member 120 is coupled with the housing body 110, the cutout 115 of the housing body 110 may not be easily separated by the sliding operation. The stopper protrusion 117 protrudes, and the support member 127 is formed in the cover member 120 corresponding to the stopper protrusion 117. Accordingly, the cover member 120 is stably coupled to the cutout 115, and prevents the cover member 120 from being separated in the sliding (sliding) direction in the coupled state.

1 is a view showing a conventional prophylactic angle for dental instruments.

Figure 2a and 2b is a view showing a prophylactic angle for dental instruments according to an embodiment of the present invention.

3 is a plan view of the housing body shown in FIG. 2A;

Figure 4 is a perspective view of the cover member shown in Figure 2a.

FIG. 5 is a perspective view showing the housing body shown in FIG. 2A; FIG.

FIG. 6 is a plan view illustrating the drive shaft and the driven shaft shown in FIG. 3; FIG.

7 and 8 are each a perspective view showing a propie angle assembly according to an embodiment of the present invention.

9A and 9B are excerpted views of the cup shown in FIG. 8;

10 and 11 are each a perspective view showing a propie angle assembly according to another embodiment of the present invention.

12 illustrates various types of polishing brushes and cups that may be applied to other prop angle assemblies in embodiments of the present invention.

Description of the Related Art

100. Housing 110. Housing body

120. Cover member 130. Locking section

200. Drive shaft 300. Drive shaft

400..combined ring 500,500 ', 500 ".. cup

600..Brush

Claims (8)

A drive shaft having a drive gear portion extended to one end of the shaft body, the drive shaft being rotatably installed with respect to the first axis; A driven shaft having a driven gear connected to the drive gear, the rotating shaft being disposed about a second axis intersecting the first axis; And a housing in which the driving shaft and the driven shaft are rotatably accommodated in a state in which the driving shaft and the driven shaft cross each other. The housing, A housing body formed to communicate from one end of the opening to the other end of the shaft fastener, and having a cutout portion which is open by cutting a portion of the front end portion adjacent to the shaft fastener; And a cover member coupled to cover the cutout to maintain the driving shaft and the driven shaft mounted in the housing while the driving shaft and the driven shaft are mounted in the housing body through the cutout. Prophy angle for dental instruments, characterized in that. The method of claim 1, wherein the housing body, A housing part and a neck part which are formed to be connected to each other in parallel with the first axis and have different inner diameters and accommodate the drive shaft therein; And And a bending portion extending from the neck portion in the second axial direction to accommodate the driven shaft therein. Prophylactic angle of the dental instrument, characterized in that the incision is formed from the neck to the bent portion. The method of claim 2, wherein the inside of the housing body, A stopper rib which prevents the driving shaft inserted and mounted through the cutout from being moved to the opening; And And a support rib formed to be spaced apart from the stopper rib so as to contact the outer circumferential surface of the drive gear of the drive shaft. 3. The method of claim 2, At the end of the bent portion is reduced the inner diameter is formed a coupling rib for supporting the driven shaft, The driven shaft, A driven gear part geared to the drive gear part, a coupler to which a brush or cup is coupled to the outside of the housing and coupled to the drive gear part, and an annular stepped inlet is formed between the driven gear part and the coupler to be coupled to the coupling rib. Prophylactic angle for dental instruments characterized in that it has a coupling portion. The method according to any one of claims 1 to 4, The inside of the cutout and the cover member, respectively, a locking part and a locking hook which are locked to each other are installed correspondingly to each other. The method according to any one of claims 2 to 4, The outer ring portion of the bent portion of the cover member and the housing body is provided with a ring engaging portion formed in an annular shape, And a coupling ring inserted into the ring coupling portion to surround and support the cover member and the housing body. A dental angle for a dental appliance according to any one of claims 1 to 4; And a dental cup or brush coupled to an end exposed to the outside of the housing body of the driven shaft. According to claim 7, The driven shaft is coupled to the dental cup, The dental cup is formed in the end is extended in the shape of a trumpet, therein four projections protruding symmetrically to each other, torn about the inner circumferential surface of the cup, characterized in that the prophylaxis for dental instruments Assembly.

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