JP3429364B2 - Medical spray syringe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical spray syringe which is suitably used for treating otolaryngology and the like and is for spraying a liquid such as a drug solution or water in a mist form.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing an example of a conventional medical spray syringe. This medical spray syringe is proposed in Japanese Utility Model Publication No. 1-43081, and a liquid bottle 2 is attached to a lower portion of the grip portion 1, and an inlet port for introducing external compressed air to the bottom portion of the liquid bottle 2. 1
3 is provided, and the compressed air pipe 3 is arranged so as to penetrate the inside of the liquid bottle 2 from the introduction port 13. When the liquid bottle 2 is mounted, the compressed air pipe 3 is connected to the air valve 4 via the ventilation pipe line 8. When the operation button 4a is pressed, the air valve 4 is opened, the compressed air in the ventilation pipe 8 flows into the ventilation pipe 9, and is introduced into the ventilation pipe 10 of the nozzle 5.

The nozzle 5 has a double pipe structure in which a flexible liquid pipe 6 is inserted into a metal pipe, and a gap between the two forms a ventilation pipe line 10. The liquid pipe 6 extends to near the inner bottom of the liquid bottle 2 through a ventilation pipe 7 formed in the grip portion 1. Therefore,
The compressed air introduced into the ventilation pipe 10 passes through the nozzle 5 and is ejected from the tip.

On the other hand, a part of the compressed air introduced into the ventilation conduit 10 serves to increase the internal pressure of the liquid bottle 2 through the ventilation conduit 7 of the grip portion 1. Then, when the liquid surface is pushed by air pressure, the liquid is fed to the tip of the nozzle 5 through the liquid pipe 6. Inside the tip of the nozzle 5, the liquid and the compressed air are appropriately mixed and changed into a mist,
Liquid is ejected from the tip opening. In this way, the liquid is delivered to the nozzle tip by utilizing the pressure of the compressed air from the outside, and spraying is performed by mixing with the compressed air at the nozzle tip.

Since it is necessary to surely stop the spraying operation after the valve operation is completed, a vent pipe line 11 and an exhaust hole 12 for quickly releasing the residual pressure of the liquid bottle 2 to the atmosphere are formed in the grip portion 1. It is set up.

[0006]

In the conventional medical spray syringe, since the exhaust hole 12 is formed on the upper surface of the head of the grip portion 1, the air valve 4 and the communication valve are not connected due to some reason such as inclination or inversion of the syringe. Liquid may remain in the trachea 11. If the valve is operated in this state, when the residual pressure is released, the liquid remaining from the exhaust hole 12 may vigorously leak out together with the air and may adhere to the eyes, skin, clothes, etc. of the user or the patient.

Further, since the flow rate of the air passing through the ventilation pipe 11 and the exhaust hole 12 is small, all the remaining liquid is not discharged and crystallizes with the lapse of time to block the ventilation pipe 11 and the exhaust hole 12. Normal residual pressure release will not be performed.

Further, since the air valve 4 is fixed to the grip portion 1 so as not to be easily disassembled, even if the liquid remaining in the air valve 4 is crystallized and the valve function is impaired, the air valve 4 can be cleaned. Absolutely impossible.

Further, since the nozzle 5 is screwed to the grip portion 1 so as to maintain airtightness, it is necessary to rotate the nozzle 5 many times at the time of cleaning or disassembling, and workability is poor. Moreover, it may damage the threads.
Similarly, the liquid bottle 2 is also screwed to the grip 1 and can be attached and detached by rotating the liquid bottle 2 itself when replenishing or replacing the liquid. It is necessary to rotate it again.

Furthermore, when connecting a tube to which compressed air from the outside is fed to the inlet port 13, since the male screw portion threaded on the inlet port 13 and the female screw portion on the tube side are screwed together, the tube The workability of attaching and detaching is poor. Further, since the air check valve is not provided on the tube side, it is necessary to stop the air compressor when the tube is attached / detached, which complicates the work.

[0011]

An object of the present invention is to provide a medical spray syringe in which an air valve for opening and closing compressed air can be easily disassembled and cleaned.

[0013]

[0014]

According to the present invention, a liquid stored in a syringe body and compressed air introduced from the outside are merged at the tip of a nozzle by a valve operation, and the liquid is ejected in a mist state. The medical spray syringe configured as described above, the liquid container detachably attached to the syringe body, the compressed air pipeline for introducing compressed air from the outside, and the compressed air pipeline are opened and closed. Air valve, a first ventilation conduit for communicating compressed air from the air valve to the space in the liquid container, and a liquid for communicating the liquid stored in the liquid container to the tip of the nozzle. And a second ventilation conduit for communicating the compressed air from the air valve to the tip of the nozzle, the air valve being a valve rod biased in a direction projecting from the syringe body, The valve rod An operating member that abuts, one end of the operating member is supported by an engaging portion formed in the syringe body, and the other end is engaged by a displacement adjusting member for adjusting the displacement range of the operating member, The air spray valve is detachable from the syringe body by engaging or releasing the displacement adjusting member and the operating member.

Further, the present invention is characterized in that the conduit resistance of the liquid conduit is larger than the conduit resistances of the first and second ventilation conduits.

According to the present invention, a pair of protrusions are formed on the inner surface of the liquid container, and a pair of protrusions are formed on the joint surface of the syringe body, and the liquid container is attached to the syringe body. In this state, the protrusions are configured to engage with each other by being angularly displaced by an angle of 180 degrees or less.

Further, according to the present invention, the circumferential groove formed on the inner surface of the nozzle and the elastic member provided on the joining surface of the syringe body are elastically engaged with each other, so that the liquid conduit in the syringe body and The nozzle is detachably attached to the syringe body so that the second ventilation conduit, the liquid conduit in the nozzle, and the second ventilation conduit communicate with each other.

According to the present invention, the inlet of the compressed air pipe is provided with first and second connectors for detachably connecting a tube to which compressed air from the outside is fed, and a second connector. By displacing the movable member attached to the connector in the tube axis direction, the first connector and the second connector are joined or released, and the second connector is opened in the joined state and closed in the released state. A stop valve is provided.

[0019]

According to the present invention, the air valve can be detached from the syringe body by engaging or releasing the displacement adjusting member and the operating member, so that the air valve can be easily taken out from the syringe body. . Therefore, the cleaning work of the air valve can be easily performed. Also, the mounting work after cleaning can be performed easily and surely.

Further, according to the invention, since the conduit resistance of the liquid conduit is larger than the conduit resistances of the first and second ventilation conduits, the residual pressure in the liquid container remaining after the valve operation is large. The portion is quickly opened into the atmosphere from the nozzle opening through the first and second ventilation conduits. for that reason,
No matter how much the residual pressure presses on the liquid surface, the conduit resistance of the liquid conduit is large, so the residual pressure is rapidly attenuated before the liquid in the conduit is jetted out, and liquid leakage is prevented. Can be prevented. Further, since it is not necessary to provide an exhaust hole in the head of the syringe body, it is possible to eliminate inadvertent liquid scattering.

Further, according to the invention, the liquid container is engaged with each other by angularly displacing the liquid container mounted on the syringe body at an angle of 180 degrees or less, whereby the liquid container is engaged by a simple operation. Can be installed securely. Further, the liquid container can be easily removed when refilling the liquid or replacing the container.

According to the invention, the nozzle is elastically engaged with a circumferential groove formed on the inner surface of the nozzle and an elastic member such as a split ring provided on the joining surface of the syringe body. When the needle is pulled by a constant force with respect to the syringe body, the outer diameter of the elastic member shrinks, the engagement with the circumferential groove is released, and the nozzle can be easily removed. Similarly, when the nozzle is pushed into the syringe body with a constant force, after the outer diameter of the elastic member contracts, the outer diameter expands at the circumferential groove and the engagement with the circumferential groove returns, The nozzle can be mounted easily and surely. Also, the liquid conduit in the syringe body and the second
By configuring the ventilation pipe, the liquid pipe in the nozzle and the second ventilation pipe to communicate with each other, the liquid pipe does not extend from the nozzle as in the conventional case, and the nozzle is miniaturized. And is easy to handle.

Further, according to the present invention, since the movable member attached to the second connector is displaced in the tube axis direction to connect or disconnect the first connector and the second connector, the tube is different from the conventional one. Easy to put on and take off. Furthermore, since the second connector is provided with the sealing valve that opens in the connected state of the connector and closes in the released state, compressed air does not leak even when the tube is removed.

[0024]

1 is a vertical sectional view showing an embodiment of the present invention. This medical spray syringe 20 includes a syringe body 21 that houses an air valve 40 and a syringe body 2
1, the liquid container 22 is detachably attached to the syringe body 1, and the nozzle 3 is detachably attached to the syringe body 21.
5 and a connector portion 70 to which a tube 71 for feeding compressed air from the outside is detachably mounted.

When compressed air is supplied from the tube 71, it is introduced into the compressed air pipe 23 via the connector portion 70. The compressed air pipe 23 is internally provided along the central axis of the liquid container 22, and its tip is hermetically and detachably inserted into an insertion hole 24 formed in the center of the bottom surface of the syringe body 21. The compressed air in the compressed air pipe 23 passes through the insertion hole 24, and the compressed air pipe line 2 formed in the syringe body 21 is formed.
Enter the air valve 40 through 5.

Although the air valve 40 is closed when the operating lever 41 is not pressed, it opens when the operating lever 41 is pressed, and the compressed air is branched and sent to the two ventilation pipes 26 and 33. One of the ventilation pipes 33 communicates with the ventilation pipe 34 of the nozzle 35, and the compressed air is fed to the tip portion 36 of the nozzle 35.

FIG. 2 is a sectional view of the nozzle 35 taken along the line A1-A1 in FIG. The nozzle 35 is a metal pipe, and the liquid conduit 32 is inserted into the hollow portion of the nozzle 35, and a gap between the two is formed as a ventilation conduit 34.

Returning to FIG. 1, the other ventilation conduit 26 communicates with the internal space of the liquid container 22, and when compressed air is introduced into the upper closed space 28, the internal pressure of the liquid container 22 becomes high. Become. In the liquid container 22, a flexible liquid conduit 30 extends to the vicinity of the inner bottom portion, and the opposite side communicates with the liquid conduit 32 of the nozzle 35 through a through hole in the syringe body 21. is doing. Therefore, the liquid container 2
When the internal pressure of 2 becomes high, the liquid surface of the liquid 29 receives downward pressure, the liquid 29 rises through the liquid conduit 30 and further passes through the liquid conduit 32 of the nozzle 35 to the tip portion 36. Be delivered.

Inside the tip portion 36, the compressed air from the ventilation conduit 34 and the liquid from the liquid conduit 32 are vigorously mixed, and the liquid is atomized and ejected from the opening of the tip portion 36. In this way, the user operates the air valve 40 with the thumb or the like while gripping the syringe 20,
Liquid can be sprayed with good workability. It should be noted that a vertically long protrusion 22a is formed on the outer peripheral surface of the liquid container 22 in the direction in which the nozzle 35 faces, and when the user holds the liquid container 22, the protrusion 22a adapts to the joint position of each finger.
Operability is improved.

On the other hand, when the operating lever 41 is released, the supply of compressed air to the ventilation pipes 26 and 33 is cut off, but the internal pressure of the liquid container 22 is still high, so that the liquid 29 continues to be used. Attempt to raise conduit 30. However, the upper closed space 28 of the liquid container 22 communicates with the atmosphere via the ventilation pipes 26, 33 and the ventilation pipe 34 of the nozzle 35. Therefore, by setting the conduit resistance of the liquid conduits 30 and 32 to be larger than the conduit resistance of the ventilation conduits 26 and 33, most of the residual pressure in the liquid container 22 remaining after the valve operation is controlled by the ventilation conduit. It is quickly opened to the atmosphere from the opening of the nozzle 35 through the passages 26 and 33. Therefore, the residual pressure is rapidly attenuated before the liquid remaining in the liquid conduit 30 is ejected, and the liquid can be prevented from leaking.

FIG. 3 is an enlarged partial sectional view of the vicinity of the air valve 40 of FIG. 1, and FIG. 4 is a view seen from the direction A2 of FIG. 3 with the air valve 40 taken out. A cylindrical space 40a along the A2 direction is formed in the syringe body 21, and the cylindrical space 40a communicates with the ventilation pipes 26 and 33, and the valve rod guide 47 of the air valve 40 maintains airtightness there. While being attached detachably. Air valve 4
At 0, the valve rod 42 is biased by the compression spring 43 in the direction in which it projects from the syringe body 21 (the direction opposite to A2),
It is linearly displaceable along the hollow valve rod guide 47.
The tip of the valve rod 42 is in contact with the operation lever 41, and when the user pushes or releases the operation lever 41, A2
Reciprocates parallel to the direction.

The valve rod 42 is provided with a valve body 45 that slides in an airtight manner with the valve rod guide 47, and an O-ring 46 is attached to increase the airtightness with the valve rod guide 47 when the valve is closed. Has been done. When the operating lever 41 is pushed and the valve rod 42 is displaced in the A2 direction, the valve body 45 moves the valve rod guide 4
7, the compressed air in the compressed air conduit 25 passes through the gap between the valve rod 42 and the valve rod guide 47, reaches the annular space 48, and branches from there into the ventilation conduits 26, 33.

A locking piece 41b is formed at the lower end of the operating lever 41, and an engagement groove 21b formed in the syringe body 21 is formed.
Is supported by. On the upper end of the operating lever 41, an engaging piece 41a having an L-shaped cross section having a U-shaped notch at the tip is integrally formed. A neck portion 44a formed at the tip of the displacement adjusting screw 44 is loosely fitted in the notch of the engaging piece 41a, and the engaging piece 41a is locked by the head portion 44b. The displacement adjusting screw 44 has a through hole 44 formed in the syringe body 21.
The displacement adjusting screw 44 is linearly displaced forward and backward by inserting a driver or the like into the through hole 44c and rotating the displacement adjusting screw 44 left and right. By adjusting the position of the displacement adjusting screw 44 in this manner, the position of the head portion 44b is displaced, and the displacement range of the operation lever 41 urged by the compression spring 43 is regulated.

Further, the air valve 40 is attached to the syringe body 2
When removing from 1, turn the displacement adjusting screw 44 and
By largely projecting b, the engagement piece 41a is released from the head portion 44b, the operation lever 41 is removed from the syringe body 21, and the valve rod guide 47 and the compression spring 43 are taken out integrally. Thus the air valve 4
1 and the ventilation pipes 26, 33 can be easily cleaned.

When the air valve 40 is mounted, the cylindrical space 4 of the syringe body 21 is reversed by the procedure reverse to the above.
0a after mounting the valve rod guide 47, etc., the operation lever 41
Is inserted into the engagement groove 21b, the engaging piece 41a is hooked on the head portion 44b of the displacement adjusting screw 44, and then the displacement adjusting screw 44 is turned to bring in the engaging piece 41a to set it at a predetermined position. In this way, the air valve 40 can be easily attached and detached.

Next, the attachment / detachment mechanism of the nozzle 35 will be described. In FIG. 3, a cylindrical space 21 a is formed in the syringe body 21 along the extending direction of the nozzle 35, and the joining member 51 is screwed therein while maintaining airtightness. At the center of the joining member 51, a joint member 30a to which the liquid conduit 30 is connected is screwed. Further, a nozzle guide 49 is airtightly screwed and mounted in the space 21a, and a circumferential groove 50a is formed on the outer peripheral surface exposed from the syringe body 21, and a split ring having a chevron cross section is formed therein. 50 is loosely attached, and the split ring 50 is elastically deformed by a force in the radial direction.

On the other hand, the nozzle 35 is screwed into a semi-spindle type nozzle holder 54, and the cylindrical member 5 is provided inside the nozzle holder 54.
3, the communication member 56 is screwed to the cylindrical member 53. On the inner surface of the nozzle holder 54, a circumferential groove 55 is formed in which the split ring 50 of the nozzle guide 49 elastically engages. Therefore, the nozzle 35 is connected to the syringe body 2
The split ring 50
After the outer diameter of the nozzle is reduced, the nozzle holder 54 is elastically expanded at the position of the circumferential groove 55, and the nozzle holder 54 can be securely held. Further, when removing the nozzle 35, the outer diameter of the split ring 50 is once contracted only by pulling the nozzle 35 with a constant force, so that the split ring 50 can be easily removed.

A liquid conduit 32 penetrates through the cylindrical member 53, and a gap forms a ventilation conduit 34. Also,
The outer peripheral surface of the cylindrical member 53 is sealed with an O-ring so as to be capable of sliding airtightly with the nozzle guide 49. Communication member 56
The outer peripheral surface of the O
Although it is sealed with a ring, an opening 57 is formed on the nozzle side, and connects the ventilation conduit 33 of the syringe body 21 and the ventilation conduit 34 on the nozzle side. Further, the liquid conduit 32 penetrates through the center of the communication member 56, and further opens at the end face,
It communicates with the space 52 and the liquid conduit 30.

As described above, when the nozzle is attached, the liquid fed into the liquid conduit 30 of the syringe body 21 passes through the joint member 30a and the space 52, and is used for the liquid of the communication member 56, the cylindrical member 53 and the nozzle 32. It is led out into the conduit 32. Further, the compressed air fed into the ventilation duct 33 of the syringe body 21 passes through the opening 57 of the communication member 56 and is guided to the cylindrical duct 53 and the ventilation duct 34 of the nozzle 35.

5 and 6 are enlarged partial sectional views of the vicinity of the connector portion 70 of FIG. 1, FIG. 5 shows a detached state, and FIG. 6 shows a mounted state. First, in FIG. 5, a hollow male connector 72 is fixed to the lower end of the syringe body 21 of FIG. 1 and communicates with the compressed air pipe 23. A projection 72b and a recess 72c are formed along the outer periphery of the insertion portion 72a of the male connector 72.

On the other hand, inside the hollow female connector 73, there is provided a hollow sliding member 74 into which the insertion portion 72a of the male connector 72 is mounted, and a compression spring 79 slides on the inner surface of the female connector 73. Is urged to the right in the figure. Further, the O-ring 75 is in close contact with the opening end of the sliding member 74, and a cylindrical sliding member 84 is further mounted, and is prevented from coming off by a step 73 a formed on the inner surface of the female connector 73. On the outer peripheral surface of the sliding member 74, a partially opened communication hole 76 and a circumferentially protruding valve body 77 are formed, and the valve body 77 contacts the step surface 78 of the female connector 73 via a packing 78. To form a sealing valve.

A plurality of balls 80 are evenly arranged in the circumferential direction and mounted on the female connector 73 so as to come into contact with the vicinity of the opening end of the sliding member 84. In the state of FIG. 5, the balls 80 slide. It projects from the outer peripheral surface of the member 84. Also,
A tubular sliding member 81a is mounted on the outer side of the sliding member 73, and is biased to the right in the figure by a compression spring 82.
A taper portion 81b is formed on the end surface of the sliding member 81a,
It is in contact with the ball 80 protruding from the outer peripheral surface of the sliding member 84. The sliding member 81a is displaced integrally with the cylindrical grip portion 81 shown in FIG. Note that FIG. 5 shows a state in which the compression spring 82 is contracted by the operation of the grip portion 81.

The female connector 73 is connected to the hollow member 88, and the tube 71 for feeding compressed air from the outside is connected to the locking portion 89 of the hollow member 88. In the state of FIG. 5 in which the male connector 72 is detached in this way, the valve body 77 which is biased
Is sealed via packing 78, the tube 7
The compressed air delivered from No. 1 does not leak out.

Next, referring to FIG. 6, when the male connector 72 is mounted on the female connector 73, the insertion portion 72a slides on the sliding member 84 and the O-ring 75 and contacts the sliding member 74 midway. When the male connector 72 is further pushed in, a compression spring 79
Shrinks, and the sliding member 74, the O-ring 75, and the sliding member 84 are entirely displaced leftward in the drawing. Then, the valve body 77 separates from the packing 78, the sealing valve opens, and the tube 71
1 is introduced into the male connector 72 through the communication hole 76, and is further delivered to the compressed air pipe 23 in FIG.

Next, when the grip 81 of FIG. 1 is released from the hand, the compression spring 82 elastically extends and the outer sliding member 81a is displaced to the right in FIG. 6 to move the ball 80 inward. I try to push it into. Further, since the sliding member 84 is displaced to the left, the ball 80 projects toward the inner surface of the female connector 73, and the male connector 7
The male connector 7 can be
2 and the female connector 73 are coupled. The female connector 7
A retaining ring 83 of the sliding member 81a is attached to the outer peripheral surface of the roller 3. In this way, the sealing valve is opened and compressed air is introduced when the male connector 72 is mounted, so that the connecting operation of the tube 71 is simplified.

Next, when removing the male connector 72 from the mounted state of FIG. 6, when the grip portion 81 of FIG. 1 is pulled, the sliding member 81a is displaced to the left of FIG.
0 is displaced to the outside of the female connector 73. Then, the engagement between the ball 80 and the recess 72c is released, and the female connector 73
When the male connector 72 and the male connector 72 are separated from each other, the sliding member 74 is displaced rightward in FIG. 6 by the compression spring 79, the valve body 77 contacts the packing 78, and the sealing valve is closed. In this way, the tube 71 can be removed with one touch while preventing leakage of compressed air.

FIG. 7 is a partially exploded perspective view showing a method of mounting the syringe body 21 and the liquid container 22 shown in FIG. 8A is a schematic bottom view of the syringe body 21, and FIG.
(B) is a schematic plan view of the liquid container 22. The lower end of the syringe body 21 has a cylindrical shape, and a pair of outward projections 91, 92 having a step along the circumferential direction is formed on the outer peripheral surface thereof. The positions of the outward protrusions 91 and 92 are shown in FIG.
As shown in (a), one of the two distances W1
The other interval W2 is set to be larger (W1 <W2).

On the other hand, a pair of inward projections 93, 94 having a step in the circumferential direction are formed on the inner peripheral surface of the liquid container 22. As shown in FIG. 8B, the interval W3 between the inward projections 93 is slightly smaller than the interval W1 in FIG. 8A, and the interval W4 between the inward projections 94 is slightly smaller than the interval W2 in FIG. 8A. And W1 <W4.

When the liquid container 22 is attached to the syringe main body 21, the liquid is adjusted so that the inward projection 93 of the liquid container 22 coincides with the interval W1 of the syringe main body 21 and the other inward projection 94 coincides with the interval W2. After inserting the liquid container 22 in the axial direction, the liquid container 22 is angularly displaced clockwise by about 90 degrees, and stops when the inward projection 93 comes into contact with the stopper 91a of the outward projection 91. In this state, the inward projections 93, 9
4 and the outward projections 91 and 92 engage with each other, the liquid container 22 is securely attached to the syringe body 21. Since the interval W4 of the inward projections is larger than the interval W1, the liquid container 22 is not inserted into the syringe main body 21 even if the liquid container 22 is mounted at another angle, and the liquid container 22 at the time of mounting.
The direction of the protrusion 22a is always constant.

When the liquid container 22 is removed, the liquid container 22 is angularly displaced counterclockwise by about 90 degrees in the reverse order of the above, and the inward projections 93, 94 and the outward projections 91, 92 are engaged with each other. Is released. Next, if the liquid container 22 is pulled out, it can be easily removed from the syringe body 21.

[0051]

As described above in detail, according to the present invention, the work for attaching and detaching the air valve is simplified, so that the work for cleaning the air valve and the syringe body can be easily carried out.

Further, the residual pressure after the valve operation is quickly released into the atmosphere from the nozzle opening through the first and second ventilation conduits, so that the leakage of the liquid can be prevented. Further, it is not necessary to provide an exhaust hole in the head of the syringe body, and careless liquid scattering can be eliminated.

Further, the mounting operation of the liquid container is simplified, and liquid replenishment and container replacement can be performed quickly.

Further, the operation of attaching / detaching the nozzles is simplified, and the nozzles can be replaced and the cleaning / disassembly can be quickly performed.

Further, the tube attaching / detaching operation for introducing compressed air from the outside is simplified, and the sealing valve is opened / closed in accordance with the tube attaching / detaching operation, so that leakage of the compressed air can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

2 is a cross-sectional view of the nozzle 35 taken along line A1-A1 in FIG.

FIG. 3 is an enlarged partial cross-sectional view near an air valve 40 in FIG.

FIG. 4 shows the A2 of FIG. 3 with the air valve 40 removed.
It is an arrow view seen from the direction.

5 is an enlarged partial sectional view of the vicinity of the connector portion 70 of FIG.

6 is an enlarged partial cross-sectional view of the vicinity of a connector portion 70 of FIG.

7 is a partially exploded perspective view showing a method of mounting the syringe body 21 and the liquid container 22 of FIG.

8A is a schematic bottom view of the syringe main body 21, and FIG. 8B is a schematic plan view of the liquid container 22.

FIG. 9 is a cross-sectional view showing an example of a conventional medical spray syringe.

[Explanation of symbols]

20 Medical spray syringe 21 Syringe body 22 Liquid container 23 Compressed air pipe 26, 33, 34 Venting line 30, 32 Liquid conduit 35 nozzles 40 air valve 41 Operation lever 70 Connector 71 tubes 72 Male Connector 73 female connector 76 communication hole 77 Disc 80 balls

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-232061 (JP, A) JP-A-2-237561 (JP, A) Actual development Sho-62-177738 (JP, U) Actual public 1- 43081 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61M 11/02 A61C 19/06 B05B 7/02

Claims (5)

(57) [Claims] 1. A medical spray syringe in which a liquid stored in a syringe body and a compressed air introduced from the outside are merged at a tip of a nozzle by a valve operation to eject the liquid in a mist state. There is a liquid container that is detachably attached to the syringe body, a compressed air conduit for introducing compressed air from the outside, an air valve for opening and closing the compressed air conduit, and an air valve. From the first ventilation pipe for communicating compressed air from the liquid container to the space in the liquid container, a liquid conduit for communicating the liquid stored in the liquid container to the tip of the nozzle, and the air valve A second ventilation conduit for communicating the compressed air of the device to the tip of the nozzle, and the air valve includes a valve rod biased in a direction protruding from the syringe body, and an operating member with which the valve rod abuts. When Provided,
One end of the operating member is supported by an engaging portion formed in the syringe body, and the other end is engaged by a displacement adjusting member for adjusting the displacement range of the operating member. The medical spray syringe, wherein the air valve is attachable to and detachable from the syringe body by engaging or releasing. 2. The medical spray syringe according to claim 1, wherein the conduit resistance of the liquid conduit is greater than the conduit resistances of the first and second ventilation conduits. 3. A pair of protrusions is formed on the inner surface of the liquid container and a pair of protrusions is formed on the joint surface of the syringe body, and the liquid container is attached to the syringe body. 18
The medical spray syringe according to claim 1 or 2, wherein the projections are configured to engage with each other by being angularly displaced at an angle of 0 degrees or less. 4. The circumferential groove formed on the inner surface of the nozzle and the elastic member provided on the joining surface of the syringe body elastically engage with each other, and the liquid conduit in the syringe body and the second passage. 4. The nozzle is detachably attached to the syringe body so that the trachea, the liquid conduit in the nozzle and the second ventilation conduit communicate with each other. The medical spray syringe according to one of the above. 5. A first and second connector for detachably connecting a tube to which compressed air is fed from the outside is provided at an inlet of the compressed air pipeline, and is attached to the second connector. By displacing the movable member in the pipe axis direction, the first connector and the second connector are connected or disconnected, and the second connector has a sealing valve that opens in the connected state of the connector and closes in the released state. The medical spray syringe according to claim 1, wherein the medical spray syringe is provided.