JPS5980236A - Apparatus for engaging main body sheath and motor case 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 This invention relates to a locking device for sealing a base (21) in a removable and relatively rotatable manner.

Conventionally, as a means for achieving this purpose, a locking hook using a spring pressure fitting shown in FIG. 1 has been provided. In other words, as shown in the same figure, from the outside of the motor case (21) toward the inside, there is a knob (a knob (with a mouth 1) supported on the screw 1, and an L integrally fixed in the axial direction at the lower end thereof. The hook part of the type locking hook (c).
This locking device is configured to be locked in an annular locking groove (E) provided in the circumferential direction of the inner wall of the moon.

However, in this conventional device, since it is an L-shaped locking hook, the vertical downward pressing force applied to the knob (B) is not accurately transmitted to the hook at the tip, and sometimes the rotational moment is There are cases where the connection and disconnection of the slug temperature cannot be carried out smoothly.

And this is extremely troublesome for medical personnel.

The present invention relates to a motor vehicle that overcomes these inconveniences and will be explained below with reference to the embodiments shown in the drawings. Each member shown in FIG. 3 is assembled and a motor case (I
A connecting auxiliary ring (5) is attached to the front of the +.

That is, (3j is an insertion cylinder, which has a notch (3a) of an appropriate depth in the axial direction of the upper part of the proximal end, and has a male thread 8I on the outer periphery of the proximal end.
5(3b) formation. (4) is the locking tube, and insert two cuts (4a) + (4a5 Y.) in the upper axial direction of 7 and make those cuts (4g) + (the cut valley part of the thin plate between 4a5 is the fork point O) It is formed on the valve plate (4b), and a 071 insert (31 notch) is formed on the upper surface of the valve plate (4b).
A hook (4c) that fits into the hole (3a) is provided protrudingly. Then, this locking cylinder (4) is tightly fitted into the insertion part (3) from the direction of the dead end, and only the valve plate (4b) is moved vertically.
'F: Make it 4. After that, the insertion tube (3
) The female threaded ring (9) is fitted into the center hole (5a) of the connection auxiliary ring (5) and is screwed onto the male threaded part (3b) protruding from the rear side thereof. Also connection assistance ff1 (5)
The guide hole (5b) is inserted from the outside of the upper part to the center hole (5a).
), and a knob (7) is inserted into the seventh guide hole (5b), and the tip (7a) of the knob (7) is engaged by the fitting screw of the insert (3). Valve plate (4b) of stop tube (4)
) is abutted against the end of the The assembled whole is then fixed to the front surface of the motor case (1) with a set screw (61) through the connection aid ffl+51' as shown in FIG.

On the other hand, an annular locking groove (8) is provided on the inner circumferential surface near the connecting end of the main body shaft (1), and the hook (4C) is provided in the seven locking grooves (81).
) Connect the motor case (2) and the main shaft (1) to each other in a manner that they engage with each other (FIG. 1).

The locking device according to the present invention is the above J-5, and in order to detach the main body shaft (1'' from the connected state shown in FIG. 1), the knob (7) is used.
Press with your finger. Then, its tip (7a) is attached to the locking tube (4).
), the end of the valve plate (4b) of the valve plate (4b) is pressed down with the cross point 0 as the cross point. 3) Surrender within. So, maintain that state and pull the main shaft (1) forward.
It can be removed from the insert (3) (Fig. 4).

Next, to lock the main shaft (1), fit the main shaft (moon) into the insertion tube (3) in the state shown in Fig.
) is tangent1ifA? With the finger in contact with the front side of the auxiliary ring + 51, release the finger pressing the knob (71).Then, the holder plate (4) σ-n valve plate (4b) will be restored as the base point of the cross point, and the ℃ knob ( 7) Push up and the ℃ hook (4C)
is engaged with the annular locking groove (81) on the main body axis (1) σ,)
(Fig. 1 again).

As described above, the device of the present invention allows the main shaft tl+ and the motor case (2; , it is possible to engage and disengage smoothly and reliably.It goes without saying that relative rotation can be performed freely.

Another advantage is that it can be easily disassembled by removing the set screw (61).

[Brief explanation of the drawing]

Figure 1 shows the conventional locking! Figure 2 is a longitudinal sectional side view of the main part of the main part σ-) of the main part σ) with the locking device according to the device of the present invention;
FIG. 3 is an exploded perspective view of the device of the present invention, and FIG. 4 is a vertical sectional side view of the main parts showing the operating state at the time of engagement and disengagement. (1)・・・・・・・Body axis, (2)・1・・・・・
・Motor case, +31...Insert tube, (
3a)・・・・・・・・・The notch, (41・・・・・・
... Locking tube, (4a), (4a'l...
・・・・・・Cut, (4b) ・・・・・・・・・Valve plate, (4
C)......Hook, 0...Fork point, (5)...Connection auxiliary ring, (5a)...
......7 center hole, (6)...set screw, (7).../p, (7a)...
...7 tip, (8) ...... annular locking groove,
(9)・・・・・・・・・Annular nut.

Claims (1)

[Claims] An insert (3) having a notch (3a) in the upper axial direction of the proximal end
), two cutting lines are cut in the upper axial direction (4a), (4a
Insert 5 holes and cut them (4a), (form the thin plate between 4a and 5 into a valve plate (4b) with the cut valley as the intersecting point O, and attach the insert plate (3) on the top surface of the seventh valve plate (4b). A hook (4c) that fits into the notch (3a) of yor) Rear insert (3
One part fits into the center hole (5a) of the connection auxiliary ring (51) which is machined into the motor case (2) via the set screw (6), and the center is inserted from the outside of the upper part of the connection auxiliary ring (5). Hole (5
Tip (7a) of the knob (7) passed through a) Y Said locking tube (410 bullet plate (4b) <7) End sVC is brought into contact, and the seventh hook (4C) is connected to the main body shaft (1) A locking device for a main body shaft and a motor case in a dental hunt piece that engages with an annular locking groove f81 formed on the inner circumferential surface near the end.