JPS6041217Y2 - dental syringe - Google Patents

Description

[Detailed description of the invention] The present application is equipped with a water passage control valve and an air passage control valve at the head of the gripping part, and when one of the control valves is actuated, a jet nozzle connected to the tip of the gripping part is provided. A dental syringe configured to eject pressurized air from the ejection nozzle when the other control valve is actuated, and eject mist from the ejection nozzle when both control valves are actuated simultaneously, In particular, when using the grasping section by hand, the flexible hoses introduced into the grasping section and connected to the water passage and air passage provided at the head of the grasping section can be freely rotated to avoid twisting. This device improves the operability of the dental syringe by connecting it to a dental syringe, and its embodiment will be described in detail below with reference to the drawings. This figure shows the entire syringe body, and a pusher 3 for externally operating a water passage control valve and a pusher 4 for externally operating an air passageway control valve are arranged in parallel on the head of the grasping part 1, respectively. ing.

FIG. 2 is a cross-sectional view showing the main parts of the gripping part 1 with the jet nozzle 2 removed, and the gripping part 1 has a water passage 6, an air passage 7 at the tip of the shaft cylinder 5, as in the conventional case. A head member 9 having a water control valve 8 operated by the pusher 3 and an air control valve (not shown) operated by the pusher 4, respectively, are screwed together.

The control valve 8 normally closes the water passage 6, and is configured so that when the pusher 3 is pressed against the restoring spring, the valve opens and the water passage 6 is opened. The valve 8 is well known, and although not shown, the air control valve also normally closes the air passage 6, and when the presser 3 is pressed against the restoring spring, the valve opens and air is released. The passage 7 is configured to be open.

At the rear end of the head member 9, a fitting recess 10 communicating with the water passage 6 and a connecting ring 11 protruding concentrically therewith and communicating with the air passage 7 are provided.

12 has a connecting tube 14 for connecting a flexible hose 13 for water at its rear end and a connecting tube 16 for connecting a flexible hose 15 for air in a protruding manner, and the fitting recess 10 at its tip. and a fitting convex portion 1 which is rotatably fitted via a sealing O-ring 17.
A rotating member provided as an extension of 8, inside which one end communicates with the connecting tube 14 and the other end communicates with the connecting tube 16. However, air holes 20 whose other ends open inside the connection ring 11 are respectively provided, and a collar 21 is provided on the outer periphery.

Reference numeral 22 denotes a bearing whose inner circumferential surface is in rotatable sliding contact with the outer circumferential surface of the rotating member 12 via a sealing O-ring 23, and whose outer circumferential surface is in close contact with the inner circumferential surface of the connecting ring 11 via a sealing O-ring 24. a ring, and the connecting ring 11 is attached to the outer circumference of the ring.
A collar 25 is provided which comes into contact with the end surface of the holder.

26 is a bag-shaped nut that is screwed onto the outer periphery of the connecting ring 11, and the closed end thereof is screwed onto the connecting ring 11 so that the collar 25 is pressed against the end surface of the connecting ring 11.
A stepped circular hole 27 into which the rotating member 12 is loosely fitted is provided so that a gap p exists between the collar 21 and the rear end of the rotating member 12.

Therefore, by screwing the bag-shaped nut 26 to the connecting ring 11, the rotating member 12 can be rotatably supported between the bearing ring 22 and the fitting recess 10, and the collar 21 can be rotated between the bearing ring 22 and the fitting recess 10. The rotary member 12 is located between the nut 26 and the rotary member 12 so that it will not come off.

As described above, according to the present application, the bearing ring that rotatably supports the rotating member and the rotating member are simultaneously attached to the head member by screwing the bag-shaped nut to the connecting ring. The structure and installation are extremely easy to operate, and it is also convenient to replace flexible hoses.
Furthermore, since the rotary member is provided with a collar, which is interposed between the lower surface of the bearing ring and the bag-shaped nut, there is an advantage that the rotary member can be securely attached to the head member.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an overall perspective view, and FIG. 2 is an enlarged sectional view of the main part. In the figure, 1 is the grasping part, 2 is the jet nozzle, 3 and 4 are the pressers, and 5
is a shaft cylinder, 6 is a water passage, 7 is an air passage, 8 is a control valve,
9 is a head member, 10 is a fitting recess, 11 is a connecting ring, 12
13.15 is a rotating member, 13.15 is a flexible hose, 14 and 16 are connecting tubes, 18 is a fitting convex portion, 19.20 is a through hole, 21.2
5 is a collar, 22 is a bearing ring, 26 is a bag-shaped nut, and 27 is a circular hole.

Claims (1)

[Scope of utility model registration request] A head member is connected to the tip of the shaft cylinder, a jet nozzle is connected to the tip of the head member, and an air passage and a water passage are connected to the head member, and each of these passages is operated and opened/closed by external operation of a presser. a fitting recess communicating with the water passage at a central position of the rear end of the head member of the syringe body comprising a valve;
A connecting link is protruded concentrically with the connecting link, the inside of which communicates with the air passage, and a bag-shaped nut is screwed onto the connecting ring to install the bearing ring within the connecting ring, and the bearing ring is attached to the tip of the connecting link. A fitting protrusion that is rotatably fitted into the fitting recess is provided as an extension, and a connecting tube is provided at the rear end to connect flexible hoses for water and air, respectively, and a collar is provided protruding from the outer periphery. The flange includes a rotating member having a through hole that communicates the water connecting tube with the fitting recess and a through hole that communicates the air connecting tube with the inside of the connecting ring. A dental syringe rotatably supported by the fitting recess and the bearing ring so as to be interposed between the lower surface of the bearing ring and the bag-shaped nut.