JPS6136932B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises an elongate sleeve assembly comprising a front sleeve with a dental tool attachment member and a gripping sleeve removably connected thereto. a medium conduit is disposed therein which is open within the confines of the dental treatment tool and is capable of receiving a supply of medium from a source at an end opposite the tool;
The present invention also relates to a dental treatment device in which adjacent open ends of the media conduits in the front sleeve and gripping sleeve combine to form a media transition.

Such a dental treatment device is known, for example, from DE 27 41 148 A1.
In this known treatment device, the medium transition section is such that the end of the gripping sleeve or front sleeve with the adjacent open end of the medium conduit projects as a connecting pipe from the end face of the sleeve assembly, and the end of the gripping sleeve or front sleeve with the adjacent open end of the medium conduit projects as a connecting pipe from the end face of the sleeve assembly. , the end with the open end of each partial medium conduit is designed to be recessed into the end face of this other sleeve and arranged as a connecting bushing for the respective pluggable connecting joint.

However, since it is necessary to insert the relatively thin connecting joint pipe into the similarly thin connecting bushing, connecting and assembling both sleeves is difficult because the connecting joints may be bent or edged. The result is that this must be done very carefully and time-consumingly to avoid collapse, loss of seal, or breakage. Moreover, the front sleeve and the gripping sleeve must be strongly connected to each other in order to obtain a sufficient seal, which increases wear and causes not only both sleeves but also each other. Over time, the sleeve media conduit becomes poorly connected. In addition, those connection joints are
Among other things, this poses a problem when cleaning and maintaining the corresponding sleeve.

A dental treatment device according to the present invention has a sleeve assembly consisting of a front sleeve provided with a mounting member for a dental treatment tool at one end, and a grip sleeve connected to one end such that the other end thereof is removable; The media conduit includes a first media conduit portion that opens toward the dental treatment tool at one end near the attachment portion, and a second media conduit portion that receives a medium supply from a media supply source at the opposite end of the attachment portion. A medium transition portion is formed between the other end of the front sleeve and the one end of the grip sleeve to communicate both medium conduit portions, and the other end of the front sleeve is connected to the one end of the grip sleeve. Fitted into the inner peripheral surface of the grip sleeve from one end, the first medium conduit portion is provided vertically within the front sleeve and the other end is opened to the outer peripheral surface of the front sleeve, and the second medium conduit portion is inserted into the grip sleeve. The medium transition portion is arranged vertically and has its other end opened at the inner circumferential surface of the grip sleeve, and the medium transition portion is connected to the outer periphery of the end of the front sleeve and the grip so that the other end of the front sleeve and the other end of the grip sleeve communicate with each other. It is configured by being formed as a sealed space between the sleeve and the inner circumferential surface of the sleeve.

The object of the present invention is to obviate the above-mentioned disadvantages and to provide a dental appliance which, when assembling the front sleeve and the gripping sleeve, does not require the provision of an intrusive and expensive connecting joint. The objective is to obtain medical treatment equipment.

The advantages achieved by the invention are essentially:
The front sleeve and the gripping sleeve can be connected by omitting the connecting joint that causes high cost and gets in the way.
This means that the connection can be assembled in such a way that there is an unhindered transfer of the medium from the medium conduit in one of the sleeves to the medium conduit in the other sleeve. By omitting the connection joint,
This has the advantage of facilitating cleaning of the media conduit.

Embodiments of the present invention will be described below with reference to the drawings.

The dental treatment device shown in FIG. 1 comprises an elongated sleeve assembly 1 releasably connected to a front sleeve 4 having a mounting member 2 for a driven dental treatment tool 3. It consists of a grip sleeve 5. Connected to the gripping sleeve 5 of this sleeve assembly 1 in a suitable and known manner is a connecting sleeve 5a, which may be pivotable relative to the sleeve 1. The dental procedure tool 3 is driven by an air turbine (not shown) embedded in the tool head 2a, by an air motor (not shown), or preferably by a shaft 1a supported in the sleeve assembly 1.
This can be done by In this last case, the shaft 1a can be driven by a driven coupling 5b of a motor (not shown), for example an electric motor, which is arranged in the connecting sleeve 5a. In the case of the dental treatment device shown, the front part of the gripping sleeve 5 is bent, the tool head 2a also being inclined. However, it is also possible to omit both such inclinations and obtain a straight dental treatment device.

The interior of the sleeve assembly 1 is provided with at least one media conduit 6 which opens towards the treatment tool 3 and which can be supplied from a source (not shown) at the end opposite the tool. and a front sleeve 4 and a grip sleeve 5 that constitute this
Adjacent open ends 7 of each medium conduit section 8, 9 are connected to each other to form a medium transition section. Here, the medium can be compressed air for driving a turbine provided in the tool head 2a, cooling air, cooling water, or light as shown in FIG. 11. Therefore, in the case of FIG. A light-conducting member 26, such as an optical fiber, is provided in the medium conduit 6 or the medium conduit sections 8, 9. In the case of the embodiments shown in FIGS. 3, 4, 5, 8 and 12, respectively, two media conduits arranged side by side, and in the case of the embodiments shown in FIGS. 9 and 10, respectively. One media conduit is provided.

Referring to FIG. 2, the end 7 of the media conduit portion 8 of the gripping sleeve 5 is attached to the inner surface 10 of the gripping sleeve wall 11.
The ends 7 of the medium conduit portions 9 of the front sleeve 4 are respectively provided on the outer surface 12 of the front sleeve wall 13 and constitute medium transition portions.

This media transition is sealed from the outside on both axial sides of the sleeve assembly 1 at the ends 7 of the media conduit sections 8, 9 of the gripping sleeve 5 and the front sleeve 4, respectively. For this sealing, sealing rings 14 are provided, which are provided in grooves provided on the cylindrical extension 15 of the front sleeve 4, which can be inserted axially into the gripping sleeve 5. It is being In FIG. 4A, a drive sleeve is provided which can be fitted into the actual front sleeve 4 by approximately half of its total length and which has two media conduits 9 arranged next to each other. In its fitted state, its protrusion constitutes the above-mentioned extension 15 of the front sleeve 4 that can be inserted axially into the gripping sleeve 5. This drive sleeve is provided with drive gears 27 at both ends thereof, and a drive shaft (not shown) is disposed between them.

A mating means 16 and a mating member arranged non-concentrically with respect to the respective sleeve axes at mutually opposite ends of the front sleeve 4 and the gripping sleeve 5 for non-centering or non-rotatically connecting them to each other. Fitting means 17 are provided to ensure that the ends 7 of the media conduits 8, 9 face each other precisely and accurately during the assembly connecting the front sleeve 4 and the gripping sleeve 5. In this case, in the example shown in FIGS. 2 to 4, the fitting means 16 are provided on the actual front sleeve 4 and the mating fitting means 17 are provided on the grip sleeve 5. The fitting means 16 is formed as an axially projecting protrusion, and the mating fitting means 1
7 is configured as an axially recessed portion for receiving these projections.

In the embodiment shown in FIGS. 5 to 10,
An annular groove 18 is formed between each seal ring 14 provided on both axial sides of adjacent open ends 7 of the medium conduit portions 8 and 9 to connect these open ends 7. This annular groove 18 is provided on the extension 15 of the front sleeve 4.

In the embodiment shown in FIGS. 5 to 10,
The front sleeve 4 and the gripping sleeve 5 are pivotable with respect to each other and are capable of being mutually restrained in different pivoting positions. For this purpose, a rotatable tightening ring 19 is provided on the gripping sleeve 5, which can be operated from the outside.

A tightening ball 23 is provided below this tightening ring 19 in a recess in the gripping sleeve 5. Since the lower end of this notch has a smaller diameter than the ball 23, the ball 23 is held within this notch.

The tightening ball is arranged in a cylindrical extension 1 of the front sleeve so as to interlock with the front sleeve 4.
one or more recesses 24 provided in the outer surface of 5;
Fits into one of the. However, in the case of FIGS. 9 and 10, these recesses are replaced by annular grooves. A notch 25 having a substantially arcuate cross section is formed in the inner wall of the tightening ring 19, and the depth of the cut becomes smaller toward its tip. In the rotational position of the tightening ring 19 shown in FIG.
4 and thus the front sleeve 4 and the grip sleeve 5 are fixed to each other. Here, this tightening ring 19
When turned counterclockwise in FIG. 7, the tightening ball 23 reaches the deepest part of the notch 25 and engages with the recess 24, as shown in FIGS. 3, 5, and 7. , thereby allowing the front sleeve 4 to be separated from the grip sleeve 5 . Therefore, by using the tightening ring 19, the front sleeve 4 and the grip sleeve 5 can be connected in a non-rotatable manner.

The outlet opening 20 of at least one medium conduit section 9 of the front sleeve 4 is sealed off from the outside on both axial parts by sealing rings 21 .

The media conduit parts 8, 9 in the front sleeve 4 or the gripping sleeve 5 are designed as channels in the sleeve wall, with the media conduit leading to the end face of the gripping sleeve 5 on the front sleeve 4 side. The part 8 is closed at its end by a stop 28.

Insofar as two media conduit sections 9 arranged next to each other are provided in the front sleeve 4, as is the case for example in the embodiments shown in FIGS. 4 and 8, these partial media conduit sections It is advantageous to provide a common mixing chamber 29 at the end of the treatment tool.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing the main parts of the treatment device according to the present invention, and FIG. 2 is a partial side view showing the front sleeve of the treatment device of FIG. 1 pulled out from the grip sleeve. FIG. 3 is a sectional view taken along the line - in FIG. 2, FIG. 4 is a left side view of the front sleeve in FIG. 2, and FIG. 4A shows two media conduit sections arranged in parallel. FIG. 5 is a side view of the drive sleeve provided and about half inserted into the front sleeve (the dashed line is a side view of only the drive sleeve); FIG. 5 is a view corresponding to FIG. 2 of the treatment device of another embodiment; 6 and 7 are sectional views taken along lines - and - in FIG. 5, respectively, and FIG. 8 is a side view of the front sleeve shown in FIG. 5 from a different direction.
FIG. 9 shows the free end side of the front sleeve of still another embodiment, and FIG. 10 is a side view of the one in FIG.
FIG. 11 shows an enlarged front portion of a treatment device according to another embodiment, and FIG. 12 is a sectional view taken along line XII-XII in FIG. 11. DESCRIPTION OF SYMBOLS 1... Sleeve assembly, 1a... Shaft, 2... Mounting member, 2a... Tool head, 3... Dental treatment tool, 4... Front sleeve, 5... Grip sleeve, 5a... Connection sleeve, 5b...driven joint,
6... Media conduit, 7... Adjacent end, 8, 9... Media conduit portion, 10... Inner surface, 11... Grip sleeve wall, 12... Outer surface, 13... Front sleeve wall,
14... Seal ring, 15... Cylindrical extension,
16, 17... Fitting means, 18... Annular groove, 19
...Tightening ring, 20...Outlet opening, 21...Seal ring, 23...Tightening ball, 24...
... recess, 25 ... notch, 26 ... photoconductive member,
29...Mixing room.

Claims (1)

[Scope of Claims] 1. A sleeve assembly comprising a front sleeve provided with a mounting member for a dental treatment tool at one end and a grip sleeve with the other end of the front sleeve removably connected to one end, A media conduit comprising a first media conduit portion that opens toward the dental treatment tool at one end near the attachment portion, and a second media conduit portion that receives a medium supply from a media supply source at an end opposite to the attachment portion. and forming a medium transition part that connects both medium pipe parts between the other end of the front sleeve and the one end of the gripping sleeve, the other end of the front sleeve is fitted into the inner peripheral surface of the grip sleeve from the one end of the grip sleeve, the first medium conduit portion is vertically disposed within the front sleeve, and the other end is open at the outer peripheral surface of the front sleeve. The second medium conduit portion is vertically disposed within the grip sleeve and is formed such that its other end opens at the inner circumferential surface of the grip sleeve, and the medium transition portion is formed at the other end of the front sleeve. and a sealed space formed between the outer periphery of the end of the front sleeve and the inner peripheral surface of the grip sleeve so that the other end of the grip sleeve communicates with each other. Treatment device. 2. The dental medical treatment apparatus according to claim 1, wherein the medium transition section has sealing means for sealing the sealed space from the outside on both sides of each sleeve in the axial direction. 3. The dental treatment apparatus according to claim 2, wherein the sealing means is a plurality of seal rings. 4. The dental treatment device according to claim 3, wherein the seal ring is provided on the outer periphery of the end of the front sleeve that is inserted into the grip sleeve. 5. The dental treatment device according to claim 3 or 4, wherein the medium transition portion is an annular groove formed between the seal rings. 6 The front sleeve and the grip sleeve are
the first ones that fit into each other at their connecting edges;
The dental treatment device according to any one of claims 1 to 5, characterized in that it has a second fitting means and a second fitting means. 7. Claim 6, wherein the first fitting means is a protrusion extending in the axial direction of one of the sleeves, and the second fitting means is a recess provided on the other side of the sleeve. The dental treatment device described in Section 1. 8. The dental treatment according to any one of claims 1 to 7, characterized in that the front sleeve and the grip sleeve are connected to be pivotable about their axes. Device. 9. The dental treatment apparatus according to claim 8, wherein one of the front sleeve and the gripping sleeve has a restraining means for restraining both sleeves at different rotational positions. 10 Claim 8, wherein the restraining means is a tightening ring operated from the outside.
The dental treatment device described in Section 1. 11. The dental treatment device according to claim 9, wherein the tightening ring is provided on the grip sleeve. 12. The dental medical device according to claim 6 or 7, wherein the first and second fitting means are disposed non-concentrically with respect to the front side and the axis of the gripping sleeve. Treatment device. 13. Claim 1, characterized in that the front sleeve has sealing means for sealing the outlet opening formed at the one end of the first medium conduit from the outside on both sides of the front sleeve in the axial direction. The dental treatment device according to any one of Items 1 to 12. 14. The dental treatment apparatus according to claim 13, wherein the sealing means is a seal ring.