JPS6142575Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a head attachment/detachment device for detachably attaching a head for dental treatment to the tip of a handshake case.

Various head attachment/detaching devices of this type have been proposed in the past, but the head attachment/detachment device of the present invention is a further improvement.

An object of the present invention is to provide a head attachment/detachment device that is inexpensive to manufacture.

1 and 2 show the configuration of an embodiment of the present invention and its attachment/detachment state, in which 1 is a guide hole drilled in the outer peripheral surface of the tip of the handshake case 2 in the direction of the center line; 3 is a guide hole; A guide hole is bored in the radial direction from the front end of the hole 1 to the outer peripheral wall surface of the handshake case 2, and the opening diameter of the guide hole 3 is somewhat smaller than the inner diameter of the guide hole 3. 4 is a guide hole drilled in the radial direction from the rear end of the guide hole 1 to the outer peripheral wall surface of the handshake case 2; 5 is a guide hole movably accommodated in the guide hole 1, with inclined surfaces at the tip and rear ends, respectively; 6 is a locking ball movably accommodated in the guide hole 3, and this locking ball 6
is in contact with the inclined surface of the tip end of the slider 5. 7
is a parking ball movably accommodated in the guide hole 4, and the parking ball 7 is provided in contact with the sloped surface of the rear end of the slider 5. Reference numeral 8 denotes a removable ring having one hole 9 and two click holes 10 recessed in the inner peripheral wall surface that contacts the parking ball 7, and a mark 11 recessed in the outer peripheral wall surface, and this removable ring 8 has guide holes. It is rotatably attached to the outer circumference of 4. Reference numeral 12 denotes a set screw screwed onto the detachable ring 8, and the tip of the set screw 12 is inserted into a retainer 13 recessed in the outer peripheral wall surface of the hand piece 2. A compression spring 14 press-fits a ball 15 into the click hole 10, and the compression spring 14 and the ball 15 cause the detachable ring 8 to clickly rotate. Reference numeral 16 denotes a groove recessed in the inner peripheral surface of the rear end of the head 17 in the circumferential direction.

In this embodiment configured as described above, when the detachable ring 8 in the state shown in FIG. 1 is rotated clockwise in the figure and positioned above the hole 9 and the guide hole 4 (see FIG. 2), ), a gap is created between the parking ball 7 and the detachable ring 8, allowing the parking ball 7 to move upward in the figure. Therefore, when the head 17 is pulled to the left in the figure and the locking ball 6, which is engaged in the groove 16 from the guide hole 3, is pressed downward in the figure by the inner circumferential wall surface of the head 17, the locking ball 6 moves downward in the figure, the slider 5 moves to the right in the figure, and the parking ball 7 moves upward in the figure, and the locking ball 6 is transferred into the guide hole 3 (Fig. 3). (see), the head 17 and the handshake case 2 can be attached and detached freely. Also, attach the tip of handshake case 2 to head 1.
7 and rotate the detachable ring 8 in the state shown in FIG. 1), the locking ball 7 pressed downward in the figure by the inner circumferential wall surface of the detachable ring 8 moves downward in the figure, and the slider 5 moves to the left in the figure, and the locking ball 7 presses downward in the figure. 6 moves upward in the figure, and with the locking ball 6 engaged in the groove 16, the parking ball 7 is parked at that position, so that the head 17 is locked to the tip of the handshake case 2. .

In the head attachment/detachment device of the present invention, the various parts mounted on the handle case 2 may be mounted on the head 17, and the groove 16 recessed in the head 17 may be provided in the handle case 2.

As explained above, according to the present invention, the number of parts is small and these parts are easy to process, so there is an advantage that the manufacturing cost can be reduced.

[Brief explanation of the drawing]

Fig. 1a is a longitudinal cross-sectional view showing a locked state of an embodiment of the present invention, Fig. 1b is a cross-sectional view taken from line A-A in Fig. 1a, and Fig. 2a is a cross-sectional view of the present invention. FIG. 2b is a cross-sectional view taken along line A-A in FIG. 2a, and FIG. 3a is a handshake case equipped with an embodiment of the present invention. A longitudinal sectional view showing the state of attachment and detachment from the head, Fig. 3b is A of Fig. 3a.
- It is a cross-sectional view seen from the A line. 1, 3, 4...Guide hole, 2...Handshake case,
5... Slide, 6... Locking ball, 7... Parking ball, 8... Detachable ring, 9... Hole, 16...
Groove, 17...Head.

Claims (1)

[Scope of utility model registration request] A head attachment/detachment device that detachably attaches a head to the tip of a handshake case, which includes a guide hole in a centerline direction drilled in an end of the head or the handshake case, and a front end and a rear end of the guide hole in the centerline direction. guide holes at the front end and rear end formed in a radial direction from the slider; a slider movably accommodated in the guide hole in the centerline direction and having inclined surfaces at the front end and rear end, respectively; a locking member that is movably housed in a guide hole at the front end and abuts on the inclined surface of the tip end of the slider; and a slanted rear end of the slider that is movably housed in the guide hole at the rear end. a parking member that contacts a surface; a removable ring that is rotatably attached to the outer periphery of a guide hole in the rear end, the ring having a recessed hole in an inner peripheral wall surface that contacts the parking member; and the handshake case. or a hole or a circumferential groove formed in the inner peripheral surface or outer peripheral surface of the end of the head, and by rotating the detachable ring in the circumferential direction, the hole in the detachable ring is inserted into the rear end. When positioned above the guide hole, the parking member, the slider, and the locking member become movable, and the head and the handshake case can be freely attached and detached. When the inner circumferential wall surface of the detachable ring is positioned above the guide hole of the rear end by rotating in the direction, the parking member is pressed toward the center by the inner circumferential wall surface of the detachable ring. The slider is moved in the distal direction and the locking member is moved in the radial direction, and the locking member is stopped at a position where it is engaged with the hole or groove of the handshake case or the head, and the head is moved in the A head attaching/detaching device characterized by being locked to a handshake case.