JPS5825155A - Fluid pressure hose connector in dental handpiece - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handpiece in which a fluid pressure hose for water, chip air, etc. is provided along the outside of a handpiece body shaft and a motor case connected thereto.

In the conventional type of handpiece, a single hose connects the fluid supply port provided at the base of the motor case to the injection pipe held in the vicinity of the shaft of the handpiece body. However, in actual use of the hunt piece, the hand piece body is subject to rotational motion relative to the motor case, which can cause the hose to twist or become tangled, which can cause the connection to become disconnected. This is often the case. To compensate for this drawback, there is a hose with extra length (jI4I sagging type), but this creates another difficulty in that it gets in the way of handpiece operation.

An object of the present invention is to provide a hunt piece in which the above-mentioned drawbacks can be eliminated by separating the fluid pressure hose between the hunt piece main body shaft side and the motor case side and using a relay part that is not affected by mutual rotation. It is in.

The embodiment shown in FIG. 1 will be explained below with reference to the embodiments shown in the drawings.
1 and 1 are dental hunt pieces which are releasably and relatively rotatably hermetically connected to each other by a locking device (14) K.

Now, as shown in Figure 2, the handpiece body axis +11
On the outer periphery of the connecting part on the side, connect the inner (3J) with the set screw (3a), and on the other hand, connect the motor case (2I@ with the outer periphery of the contact tAs) with the set screw (4a). 11a direction #C of at least one joint surface of these 1111 (31, (41) has two annular grooves +
5), 151 is installed (in Fig. 2, connecting inner cylinder +3
7, in Fig. 3, there is an annular space (6+,
(4n is formed.This annular space is a relay space for the town and the fluid, and the junction Il#c on both sides thereof is a seal ring (1
9) to prevent fluid leakage to the outside. Further, two value-oriented fluid pressure relay pipes (71) are provided in the inner-axial direction of the connecting inner cylinder C), the tip of which protrudes outward on one side, and the base end communicates with Kanki Kanjo Kukancho, and the other Contact external cylinder (410
The circular part radial direction #C causes the tip to protrude to the outside, and further bends the protrusion to the rear to form one hole in the annular space (
61K connected two backward fluid pressure relay vibes)
will be established. And U forward fluid pressure relay pipe (71
and the two injection pipes (10) installed near the hunt piece body shaft (II/) 1ull via clamps are connected with hoses (11) and the fluid pressure relay pipe 181 (described later). Motor case mackerel) base 11
It is constructed by connecting two fluid supply pipes (12) provided at 1s with hoses (13).

Next, to explain its operation, the practitioner grasps the hunt piece in the state shown in Figures 1 and 3 in his hand, starts the motor to drive the tool, and supplies water or chip air as necessary. Hose (13) from pipe (12), backward relay pipe town, empty space town.

Treatment is carried out by injecting from the injection pipe (10) through the relay pipe 171 and the hose (11).
At this time, the hunt piece body shaft (11 is the motor case (2)
), it can be rotated at any angle. To explain this in detail, the handpiece body 111
tl+ and motor case body; is locking device F (14)
The knob (
15) will not come off unless you operate the connecting inner cylinder (
31 and the connecting outer cylinder (41) rub against each other and can be rotated.In other words, the joint surface of (4) #CIR
It is possible to rotate relative to each other while forming an annular space (61), and with the annular space (6) as a relay space, separate fluid pressure relay pipes +77 and 181 are provided on one side and the rear.
Therefore, along with the rotation of both ml +31 and +41, the respective relay pipes (71 and 181) rotate independently of each other, and as a result, these Kjl-connected hoses are connected to the hunt piece body shaft 111 side (one side). The motor case and one motor case (rear) are separated, and neither is affected by the other's movements at all.

Therefore, compared to the conventional single hose type handpiece, the
There is no need to worry about the hose becoming kinked or tangled, and no excessive force is applied to the hose connection. Of course, there is no need to let the hose hang down.

Since the hose was divided into two, disassembly and removal became easier.

From the above, it will be easily understood that the present invention is truly advantageous in achieving the intended purpose.

In addition, the above l! The description is based solely on the preferred embodiment of the present invention, and is not intended to change the gist of the invention.
Of course, there are many design changes that can be made.

[Brief explanation of the drawing]

1IE1 Figure is an oblique view of the handpiece equipped with the device of the present invention.
, Figure 1112 is an exploded perspective view of the same as the above, and the 3rd Kyodomo l! It is a longitudinal enlarged side m view. (1)・・・・・・・Hunt piece body shaft, (21・
・・・・・・・Motor case, (31・・・・・・・
・Connection inner cylinder, (41...Connection outer cylinder, (5;
・・・・・・Annular groove, town・・・・・・Annular space,
(7+...Forward fluid pressure relay pipe, 1
81""""° Rearward fluid pressure relay pipe, (9;...
・・・・・・Holder, (10)・°°°°°°°°Injection pipe, (11)------Hose, (12)・
......Fluid supply pipe, (13)...
・Bose, (14)・・・・・・Latching IIRt, (
15)...................knob, (16)...
...Spring, (17) ...Latching hook, (1
7m)...The hook, (18)...
...Annular locking groove, (19)------Seal ring.

Claims (1)

[Claims] 1) Handpiece body l1l (11 and motor case (
21 is removably and relatively rotatably connected to each other by a locking device (14). On the other hand, attach the connecting outer cylinder (41) to the outer periphery of the motor case (21 side), and attach both II
An annular groove (5) is provided in the rotating direction of at least one joint surface of (31, 14>) to form an annular space (61) on the joint surface of both cylinders Lll, e (41, and the inside of the connecting inner cylinder 131. In the axial direction, a fluid pressure relay pipe (7) for casting is provided whose proximal end protrudes outward to the outside and the proximal end communicates with the annular space (61), and in the radial direction of the inside of the connecting outer part, the tip is bent outward to the rear. A rearward fluid pressure relay pipe (8 pieces) is formed and connected to the annular space (6), and a forward fluid pressure relay pipe +71 and a handpiece body (11) A dental hand characterized in that an injection pipe (l is connected with a hose (11) and #l is connected with a backward fluid pressure relay pipe and a motor), and teeth 12 + no! 11 are connected with a hose (13). 2) A patent claim in which an annular space 161 is formed by rotating an annular arm (51, 451) corresponding to the rotational direction of the joint surface of the connecting inner 1 1 l 1 port 1 and the connecting outer cylinder (41). 3) A seal ring (1) on the joint surface on both sides of the annular space (6).
9) A fluid pressure horn contact II device in a medical handpiece according to claim 91 or #I2. 4) Lock! The IT pin (14) is a knob (
15), and the hook 8It (17m) of the locking hook (17), which is integrally fixed in the axial direction of the lower end, is attached to the handpiece body @111. Annular locking groove (18) K provided with ilK
A fluid pressure hose connection device for a tree bead according to any one of claims 1 to 3, which is adapted to be locked.