JPH0639001U - Connector with suction control function - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a connector with a suction control function capable of maintaining airtightness between a valve member and a central tip portion, eliminating negative pressure leaks, simplifying manufacturing work, and achieving high yield. [Structure] A main passage connecting between the two supply ports and the suction port 3,
The central tip 6 of the supply port is provided near the center of the main passage and is directed toward the outside of the main body at the position of the bypass portion 4 that bypasses the main passage, and the central tip is provided on the pipe wall of the main body facing the central tip. An opening 5 having a diameter larger than the diameter, a valve member 7 that covers the opening and closes the central tip 6 in close contact, and a valve member that is detachably attached to the opening to support the valve member and the ceiling. Cap 9 having a hole 10 near the center
And a ring 12 having a diameter larger than the diameter of the central tip provided between the joint portion of the cap and the valve member, and a suction control function in which the supply port and the suction port are formed integrally with the main passage. An O-ring 13 is provided on the central tip side of the portion where the valve member contacts the central tip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connector with a suction control function, and more particularly to a connector with a suction control function that can be operated by one hand for an aspirator used in surgery or tracheal suction.

[0002]

[Prior art]

 The air suction connector used for surgery or tracheal suction is a very important device for the smooth performance of surgery. Therefore, surgeons are always looking for a compact suction connector that can quickly, easily and surely perform an air suction operation according to the progress of surgery, and that is easy to open and close. As a one-handed operation suction connector that meets this demand, there has been a connector with suction control function.

As a suction connector of this type, there is one proposed by the same applicant as the present applicant and disclosed in Japanese Utility Model Application Laid-Open No. 2-139645. The detailed explanation is given in the same publication, but the summary is briefly described below. In other words, this connector with suction control function uses materials with different mechanical characteristics for the valve member, and also installs a ring of a specific size between the valve member and the cab on which it is installed, and supplies it. By providing airtightness to the close contact part of the valve member that bypasses the passage connecting the mouth and the suction port, vibration during the suction operation of the valve member is prevented, and the supply port and the suction port are integrally molded to make the connector It is designed so that the size is not too large. In this case, as a means for imparting airtightness as described above, the portion where the valve member comes into contact with the central tip and the vicinity thereof is subjected to silicone elastomer treatment.

It should be noted that what is used as a member is, for example, a normal one, the main body is a molded product made of polystyrene (PS), and the valve member is a diaphragm made of polyvinyl chloride (PVC). is there.

[0005]

[Problems to be solved by the device]

 In the conventional connector with a suction control function as described above, silicone elastomer treatment is applied to the central tip end portion where the valve member contacts as described above, so that the airtightness at the time of contact with the valve member is improved. There is. However, P. S. Is a hard material, it does not adhere well to the PVC diaphragm, and there is a problem that negative pressure leaks easily when the small holes in the cap are open (the negative pressure is completely shut off in the past). there were. In addition, the silicone / elastomer treatment, which is being implemented as a countermeasure, has difficulty in controlling the viscosity of the silicone / elastomer and the coating method, and it may not be possible to perform uniform treatment. . In addition, depending on the material of the connector, it may be difficult to process silicone elastomer. For this reason, there is a problem in that the airtightness is insufficient when the suction is stopped, and moreover, the above-mentioned negative pressure leak occurs.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to maintain the airtightness between the valve member and the central tip portion without performing the silicone elastomer treatment. It is an object of the present invention to provide a connector with a suction control function that eliminates pressure leak, is easy to manufacture, and has a high yield.

[0007]

[Means for Solving the Problems]

 The connector with a suction control function according to the present invention comprises a main passage connecting between the supply port and the suction port which constitute both ends of the main body, and a bypass portion provided near the center of the main passage for bypassing the main passage. At the position, the central tip of the supply port provided toward the outside of the main body, the opening provided on the pipe wall of the main body facing the central tip with a diameter larger than the diameter of the central tip, and covering this opening. And a valve member that closes the central tip in close contact, a cap that is detachably attached to the opening and that supports the valve member and that has a hole near the center of the ceiling, and that is provided between the joint between the cap and the valve member. A connector with a suction control function, which consists of a ring having a diameter larger than the diameter of the central tip, and the supply port and the suction port are molded integrally with the main passage, where the valve member contacts the central tip. O-ring at the center end of Those having. In this case, the O-ring is preferably made of natural rubber, synthetic rubber or silicone rubber having a rubber hardness of 40-60. The outer diameter of the center tip is 1. It should be 0 to 1.3 times larger, and the center tip should not protrude beyond the O-ring when the O-ring is attached.

[0008]

[Action]

 In the present invention, since the O-ring of the elastic body is provided at the central tip portion where the valve member comes into contact with the central tip, the elastic body (rubber) has resilience and appropriate surface friction, Compared with the conventional products without O-rings, the contact and adhesion with the valve member is significantly improved. Therefore, in the negative pressure state when suction is stopped, air leak is less likely to occur.

[0009]

【Example】

 1 and 2 are schematic explanatory views showing an embodiment of a connector with a suction control function according to the present invention. FIG. 1 is a sectional view showing a suction stopped state, and FIG. 2 is a sectional view showing a suction state.

In FIG. 1, a suction connector 1 has a supply port 2 and a suction port 3 forming both ends thereof, and a passage of the supply port 2 in a passage direction in a substantially central portion of a main passage connecting these two. A detour point 4 is formed so as to detour at a right angle to the detour point 4, and an opening 5 is formed outside the detour point 4 by hollowing out a pipe wall. In this opening 5, a central tip 6 having a flat end face extending from the supply port 2 is provided at a detour point 4 located substantially in the center of the main passage, and on a plane surrounding the central tip 6. A flexible valve member 7 for covering the flat surface of the central tip 6 so as to be in close contact with the outer peripheral portion of the flexible valve member 7. Further, the valve member 7 has a cap 9 which is welded to the receiving seat 8 or detachably screwed. A hole 10 for manual control is provided near the center of the ceiling of the cap 9. A small hole 11 is provided in the outer peripheral portion of the valve member 7 between the central tip 6 and the receiving seat 8, and a bypass hole communicating the space of the opening 5 and the main passage of the suction port 3 with each other. Is formed.

The main structure of the above-mentioned suction connector is basically the same as that of the above-mentioned conventional connector, but in the present invention, the outer periphery of the central tip 6 is made of an elastic material such as silicone rubber. It is characterized in that the O-ring 13 is attached. The manner of attachment and the manner of attachment are that the top flat portion of the central tip 6 does not protrude from the upper surface of the O-ring 13. The outer shape of the central tip 6 is 1.0 to 1.3 times the inner diameter of the O-ring 13, and thus the O-ring 13 is prevented from coming off during the operation of the device. The O-ring 13 needs to be a rubber-like elastic body, but any of natural rubber, synthetic rubber or silicone rubber having a rubber hardness of 40 to 60 was preferable in terms of practicality.

The operation will be described with reference to FIGS. 1 and 2. That is, FIG. 1 shows a connector with a suction control function in the suction stopped state. In this state, suction is performed from the suction port 3 by a suction source (not shown) with the hole 10 left open as indicated by a thick arrow. It is obtained by doing. The negative pressure generated by the suction source pulls the valve member 7 downward as indicated by a small arrow, and cuts off the areas A, B and C at the central tip 6. At this time, a small hole 11 is provided in the valve member 7, but since this hole is small, it cannot pass the amount of air enough to make the negative pressure in area C zero (0). There is a pressure difference between zone and zone C. Moreover, the valve member 7 having both elasticity and elasticity is in contact with the O-ring 13 in an airtight state in this form. The reason is that the rubber elasticity of the O-ring 13 presses the valve member 7 with an appropriate pressure, and in addition, an appropriate surface friction of the rubber acts. Therefore, even if the space area C of the suction port 3 becomes a negative pressure, fluid leakage does not occur in this valve portion.

Next, when sucking the object to be sucked through the supply port 2, as shown in FIG. 2, the hole 10 is pressed by the finger 14 or the like to close the hole. In this case, the suction from the suction port 3 is continued as in the case of FIG. In this way, the air in the space B of the opening 5 is removed from the suction port 3 through the small holes 11. Therefore, the pressure in the area B becomes the same as the pressure in the area C, and there is no force to lower the valve member 7 downward. At this time, since the area A is at atmospheric pressure, the valve member 7 is sucked (depressed) toward the opening 5, so that a gap is generated between the valve member 7 and the closely attached O-ring 13. Therefore, the closed supply port 2 and the closed suction port 3 communicate with each other to generate a large air flow as indicated by the arrow. In other words, suction is started by the suction force (pressure difference) of the air flow generated by the communication, the substance to be sucked comes in from the supply port 2, and is transferred to the suction port 3 while detouring at the detour point 4. ) Will be done. Usually, by being transferred, the aspirate is discharged or stored at an appropriate place. When the suction purpose is completed and the finger 14 is removed from the hole 10 and the suction control operation is stopped, the state returns to the state shown in FIG. 1 and the valve section maintains a normal suction stopped state without leaking. be able to.

[0014]

[Effect of device]

 As described above, according to the present invention, an O-ring made of an elastic body is fitted to the tip of the cylindrical portion at the central tip of the negative pressure cutoff surface made up of the central tip and the valve member, and the O-ring and the valve member surface of the diaphragm are fitted. Since the structure is such that the valve is in close contact, the degree of close contact of the valve part is significantly improved compared to the case without an O-ring, and the negative pressure can be completely shut off even with the suction operation stopped even by adding simple parts. The effect was obtained.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing a structure of an embodiment of a suction connector according to the present invention and a suction stopped state.

FIG. 2 is a sectional explanatory view showing a state of a suction operation of the embodiment of FIG.

[Explanation of symbols]

 1 Suction Connector 2 Supply Port 3 Suction Port 4 Detour Point 5 Opening Point 6 Central Tip 7 Valve Member 8 Receiving Seat 9 Cap 10 Hole 11 Small Hole 12 Ring 13 O Ring 14 Finger

Claims (3)

[Scope of utility model registration request] 1. The outside of the main body at the position of a main passage that connects between a supply port and a suction port that constitute both ends of the main body and a detour portion that is provided near the center of the main passage and detours the main passage. And a central tip of the supply port provided toward the central tip, an opening provided on the tube wall of the main body facing the central tip with a diameter larger than the diameter of the central tip, and covering the opening, Between the valve member that closes the central tip in close contact, the cap that is detachably attached to the opening and supports the valve member and that has a hole near the center of the ceiling, and the joint between the cap and the valve member. A connector with a suction control function, which is provided and has a ring having a diameter larger than the diameter of the central tip, wherein the supply port and the suction port are integrally formed with the main passage, and the valve member is at the center. Of the part that comes into contact with the tip Suction control function connector and having an O-ring to serial central distally. 2. The connector with suction control function according to claim 1, wherein the O-ring is made of natural rubber, synthetic rubber or silicone rubber having a rubber hardness of 40 to 60. 3. The outer diameter of the central tip is 1.0 to 1.3 times the inner diameter of the O-ring, and the O-ring is mounted so as to project from the central tip. The connector with suction control function according to claim 1 or 2.