JP7377147B2 - Pedestal and protective cap assembly - Google Patents

Description

TECHNICAL FIELD The present invention relates to a base for a protective cap attached to a connector of a medical tube and a protective cap assembly.

In recent years, peritoneal dialysis has attracted attention because of its low burden on patients. Among the peritoneal dialysis methods, continuous ambulatory peritoneal dialysis (CAPD) is considered to be easier to return to society because patients can change the dialysate bag themselves at home or at work. There is.

In continuous portable peritoneal dialysis, a tube connected to the patient and a tube connected to a dialysate bag are connected via a connector. While the dialysate bag is not connected, temporarily attach a protective cap to the tube connector connected to the patient. To prevent bacterial infections, the protective cap is disposable and can only be used once.

Such a protective cap is provided as a product attached to a pedestal, and immediately before use, it is removed from the pedestal and attached to the connector. Regarding a protective cap and its pedestal, Patent Document 1 discloses that a cylindrical fitting part is fitted into a recessed part of the protective cap in order to prevent falling bacteria from adhering to the protective cap and to allow the patient to easily take out the protective cap from the pedestal. A pedestal for holding the cap is disclosed. Furthermore, Patent Document 2 discloses a pedestal having a structure in which a protective cap is sealed before use with a stopper having a ring-shaped handle.

JP 2017-176358 Publication JP2013-42952A

When connecting a protective cap to a connector, hold the connector and its tube in one hand, hold the protective cap with the other hand, and screw the protective cap together. In this way, both hands are occupied when connecting the protective cap to the connector. However, with conventional pedestals, it is necessary to remove the protective cap with both hands. Therefore, if you forget to remove the protective cap from the pedestal in advance when connecting the protective cap to the connector, there is a problem that it becomes difficult to remove the protective cap from the pedestal, making it difficult to connect the protective cap.

One aspect of the embodiments is to provide a pedestal and a protective cap assembly that allow the protective cap to be easily removed with one hand.

One aspect of the following disclosure is a pedestal of a protective cap that is attached via a screw structure to a connector that connects the middle of a medical tube in a separable manner, the pedestal being formed in a wider area than the inside of the protective cap. a support part; and a fitting part that protrudes from the support part and is inserted into the inside of the protective cap so as to be able to close the inside of the protective cap, the fitting part being able to close the inside of the protective cap. a side wall portion that is formed along the upper end portion and is slidably in close contact with the protective cap; an upper end portion that closes the upper end of the side wall portion; and a side wall portion that protrudes from the upper end portion and is elastically deformed when the protective cap is pushed toward the support portion side. and a pressure receiving member that transmits a pressing force acting on the protective cap to the upper end portion, and when the protective cap is pressed toward the support portion, the upper end portion is moved by the pressing force via the pressure receiving member. As the side wall portion is deformed into a concave shape, the diameter of the side wall portion is reduced, weakening the close contact between the protective cap and the fitting portion, and when the pressing of the protective cap is released, the protective cap is moved by the elastic force of the pressure receiving member. It is located on a pedestal where the protective cap is removed from the fitting portion by being pushed up.

Another aspect is a protective cap assembly that includes a protective cap that is attached via a screw structure to a connector that connects the middle of a medical tube in a separable manner, and a pedestal to which the protective cap is fitted. The pedestal includes a support portion formed in a wider area than the inside of the protective cap, and a support portion that protrudes from the support portion and is inserted into the inside of the protective cap to close the inside of the protective cap. a fitting portion, the fitting portion comprising: a side wall portion formed along the inside of the protective cap and slidably in close contact with the protective cap; and an upper end portion closing an upper end of the side wall portion. a pressure-receiving member that protrudes from the upper end and is elastically deformed when the protective cap is pushed toward the support portion and transmits a pressing force acting on the protective cap to the upper end; When the upper end part is deformed into a concave shape by the pressing force through the pressure receiving member, the diameter of the side wall part is reduced, weakening the close contact between the protective cap and the fitting part, and the protective cap is pressed against the fitting part. In the protective cap assembly, when the pressing force on the cap is released, the protective cap is pushed up by the resilient force of the pressure receiving member, and the protective cap is removed from the fitting part.

According to the pedestal and protective cap assembly of the above aspect, the protective cap can be removed from the pedestal by only one-handed operations such as pressing the protective cap and releasing the pressure.

Figure 1A shows the state in which the dialysate is stored in the peritoneum, Figure 1B shows the state in which the dialysate is drained in the peritoneum, and Figure 1C shows the state in which the dialysate is injected into the peritoneum. , FIG. 1D shows the state during storage of new dialysate. FIG. 3 is a perspective view of the catheter and connector after removing the dialysate bag and drainage bag. FIG. 3 is an explanatory diagram showing a method of attaching a protective cap to a connector. FIG. 4 is a cross-sectional view of the protective cap and connector of FIG. 3 screwed together; FIG. 2 is a perspective view of a protective cap assembly according to the present embodiment. FIG. 6 is an exploded perspective view of the protective cap assembly of FIG. 5; FIG. 6 is a cross-sectional view of the pedestal in FIG. 5; FIG. 6 is a sectional view of the protective cap assembly of FIG. 5 immediately after assembly; FIG. 6 is a sectional view showing deformation of the pedestal when the protective cap of FIG. 5 is pressed.

Hereinafter, preferred embodiments of the pedestal 14 and the protective cap assembly 10 will be described in detail with reference to the accompanying drawings.

In peritoneal dialysis, dialysate is injected into the patient's peritoneum and stored for a predetermined period of time, allowing waste products and water to move through the peritoneum to the dialysate side. For a predetermined period of time (for example, 4 to 8 hours) after the dialysate is injected into the body, the patient can move freely, as shown in FIG. 1A. A catheter 80 inserted into the peritoneum is always attached to the patient, and dialysate is exchanged via this catheter 80.

Dialysate exchange is performed as shown in FIGS. 1B and 1C. First, the connecting tube 85 to which the drainage bag 90 and the dialysate bag 84 are connected is connected to the connector 82 at the tip of the catheter 80 inserted into the peritoneum of the patient. The connecting tube 85 branches in the middle, with one tube 86 connected to the dialysate bag 84 and the other tube 88 connected to the drainage bag 90.

As shown in FIG. 1B, the patient closes the clamp on tube 86 and drains the dialysate containing waste products within the patient's peritoneum into drainage bag 90. The patient then closes tube 88 and opens tube 86, and the dialysate from dialysate bag 84 is injected intraperitoneally through tube 86 and catheter 80, as shown in FIG. 1C.

Thereafter, as shown in FIG. 1D, the patient removes the connecting tube 85 from the catheter 80, completing the dialysate exchange. A patient lives with the catheter 80 attached to his or her body.

As shown in FIG. 2, the connector 82 at the tip of the catheter 80 is a male connector in which a thread (second thread structure 82e) is formed on the outer periphery of a cylindrical connecting portion 82c. Leaving the connector 82 exposed may cause complications due to bacterial infection.

After completing the dialysate exchange operation, the patient holds the connector 82 at the tip of the catheter 80 with one hand and the protective cap 12 with the other hand, as shown in FIG. The cap 12 is screwed on and attached to protect the connector 82. From the viewpoint of preventing infectious diseases, the protective cap 12 is used disposable. Further, the protective cap 12 is attached so that the inside of the protective cap 12 does not face upward in order to prevent the attachment of fallen bacteria. The protective cap 12 is provided with a pair of plate-shaped fins 12g extending outward from the cylindrical outer tube portion 12a to facilitate the patient's grasping and screwing operations.

As shown in FIG. 4, the protective cap 12 has a double structure to prevent the patient's fingers from touching the portion communicating with the catheter 80 (the inside of the inner cylinder portion 12b). That is, it has a structure in which a short inner cylinder part 12b is formed inside an outer cylinder part 12a formed in a cylindrical shape with a bottom. A first threaded structure 12c (screw thread) is formed on the inner side of the outer cylinder portion 12a, and this first threaded structure 12c is screwed into a second threaded structure 82e of the connector 82. A circular ring-shaped packing 12d is fitted into the inner cylindrical portion 12b. A porous member containing a disinfectant such as povidone-iodine may be attached to the ring-shaped groove 12e between the outer cylinder part 12a and the inner cylinder part 12b.

The connector 82 includes a catheter fixing part 82a to which the catheter 80 is connected, a flange part 82b formed on the distal end side of the catheter fixing part 82a, and a connecting part 82c formed on the distal end side of the flange part 82b. The flange portion 82b is formed to have a larger diameter than the catheter fixing portion 82a and the connecting portion 82c. The connecting portion 82c extends in a cylindrical shape from the flange portion 82b toward the distal end side. A second screw structure 82e is formed on the outer side of the connecting portion 82c. The second screw structure 82e is formed to be able to be screwed into the first screw structure 12c of the outer cylinder portion 12a. On the inside of the connecting part 82c, an inner connecting part 82d, which is inserted into the inner cylinder part 12b, is formed so as to extend in a cylindrical shape toward the tip. A communication hole 82f communicating with the inside of the catheter 80 is formed inside the inner connecting portion 82d.

The protective cap 12 is attached so that the outer cylinder part 12a covers the outside of the connecting part 82c, and the ring-shaped packing 83a provided at the base of the connecting part 82c and the inner circumferential surface 12h of the outer cylinder part 12a are in contact with each other. come in close contact. The first screw structure 12c is not formed on the inner circumferential surface 12h of the end portion 12f of the outer cylinder portion 12a near the opening 12i, and the inner circumferential surface is formed as a smooth circumferential surface. The smooth circumferential surface portion of the inner circumferential surface 12h comes into close contact with the packing 83a, so that the connecting portion 82c is hermetically sealed inside the protective cap 12. Moreover, the communication hole 82f is hermetically sealed by the inner connecting portion 82d coming into close contact with the packing 12d of the inner cylinder portion 12b. In this way, the protective cap 12 protects the connector 82 with its double sealing structure. Further, since the inner cylinder part 12b is arranged at the back side of the outer cylinder part 12a so that the patient's fingers cannot enter therein, contamination due to touching with hands can be prevented.

By the way, in this embodiment, the protective cap 12 is provided as a product as a protective cap assembly 10 according to this embodiment shown in FIG. The protective cap assembly 10 includes a protective cap 12 and a pedestal 14 assembled to cover the opening 12i of the protective cap 12. The pedestal 14 is configured to keep the inside of the protective cap 12 in a sterile state by closing the inside of the protective cap 12 until just before use.

As shown in FIG. 6, the pedestal 14 includes a support portion 18 formed in a plate shape and a fitting portion 20 that protrudes from the support portion 18 and closes the inside of the protective cap 12. The support portion 18 is a portion extending in a flange shape from the outside of the base end portion of the fitting portion 20, and is formed in a disk shape. The outer periphery of the support portion 18 is formed to have a smaller diameter than the outer periphery of the end portion 12f of the outer cylinder portion 12a of the protective cap 12. This can prevent the protective cap 12 from tilting at an unintended angle due to the support portion 18 hitting an obstacle or the like during storage or handling.

The fitting part 20 is a cylindrical part that protrudes from the support part 18 , extends in a direction perpendicular to the support part 18 , and connects a circumferentially formed side wall part 22 and an inner side of the side wall part 22 . It includes a closed upper end 24 and a pressure receiving member 26 protruding from the upper end 24. As shown in FIG. 7, the side wall portion 22 and the upper end portion 24 of the fitting portion 20 are formed of a plate-like member integrally connected to the support portion 18 and having a U-shaped cross section. A recess 25 that opens toward the lower end is formed inside the upper end 24 (lower side in the figure).

The side wall portion 22 has a small diameter portion 22a formed on the lower side near the support portion 18, and a seal portion 22b formed on the upper side of the small diameter portion 22a. The small diameter portion 22a is formed to have a slightly smaller diameter than the inner diameter of the inner circumferential surface 12h of the protective cap 12, and is a portion that does not come into close contact with the inner circumferential surface 12h of the protective cap 12. Therefore, even when the protective cap 12 is pushed toward the support portion 18 as described later, the small diameter portion 22a is configured so as not to come into contact with the inner circumferential surface 12h and not increase sliding resistance. There is.

The seal portion 22b of the side wall portion 22 is formed to have a diameter slightly larger than the inner diameter of the inner circumferential surface 12h so as to be in close contact with the inner circumferential surface 12h of the protective cap 12. A sealing surface 22c that can make surface contact with the inner peripheral surface 12h of the protective cap 12 is formed on the outer peripheral side of the sealing portion 22b. The sealing surface 22c makes surface contact with the inner circumferential surface 12h, so that the fitting portion 20 performs the sealing function of the inside of the protective cap 12.

The upper end portion 24 is formed into a thin plate shape parallel to the support portion 18, and can be elastically deformed so as to bend in the thickness direction in response to input of a load in the thickness direction. A convex portion 24a is formed at the center of the upper end portion 24 and is bent upward in a convex shape. The convex portion 24a exhibits relatively high rigidity and can prevent uneven elastic deformation of the upper end portion 24. The upper end portion 24 undergoes elastic deformation in the thickness direction centering on the convex portion 24a. A pressure receiving member 26 extends upward from the upper end 24 around the convex portion 24a.

The pressure receiving member 26 of this embodiment includes a pedestal spring 28. The pedestal spring 28 includes a helical column portion 28a formed in a spiral shape to constitute a compression coil spring, and an annular portion 28b provided at the upper end of the helical column portion 28a. The pedestal spring 28 includes four spiral pillars 28a, and each spiral pillar 28a is arranged at equal intervals at an angle of 90° in the circumferential direction. The lower end of the spiral column portion 28a is integrally formed with the upper end portion 24. The upper end of the spiral column portion 28a is joined to the annular portion 28b. The four spiral column parts 28a are connected in the circumferential direction via the annular part 28b. The annular portion 28b is formed in a circular ring shape parallel to the upper end portion 24. The diameter (outer diameter) of the annular portion 28b is the same as the outer diameter of the spiral column portion 28a, and is smaller than the diameter of the upper end portion 24. An abutment groove 28c, which is a ring-shaped groove extending along the circumferential direction, is formed at the upper end of the annular portion 28b.

As shown in FIG. 8, the contact groove 28c is a portion that comes into contact with the tip portion 12b1 of the inner cylinder portion 12b of the protective cap 12 when the protective cap 12 is mounted on the base 14. The abutment groove 28c has a tip end of the inner cylindrical portion 12b inside the abutment groove 28c so that the pedestal spring 28 can come into contact with the entire circumferential area of the inner cylindrical portion 12b without tilting when a load is input. The portion 12b1 is accommodated. The annular portion 28b receives the load when the protective cap 12 is pressed against the pedestal 14 without being biased in the circumferential direction.

In the pedestal 14, the support portion 18, the fitting portion 20, and the pedestal spring 28 are preferably formed integrally from a resin material. Alternatively, the support portion 18 and the fitting portion 20 may be integrally formed, and a separately formed pedestal spring 28 may be joined to the upper end portion 24. As the material constituting the pedestal 14, it is preferable to use a resin material that has excellent adhesion and sliding properties with the protective cap 12. Examples of such resin materials include POM (polyacetal) resin. The pedestal 14 of this embodiment is configured as described above.

As shown in FIG. 8, the protective cap assembly 10 of this embodiment is constructed by fitting the protective cap 12 into the fitting portion 20 of the pedestal 14 described above. In the protective cap 12, the inner circumferential surface 12h of the outer cylindrical portion 12a is in close contact with the sealing portion 22b (sealing surface 22c) of the fitting portion 20 of the pedestal 14, and the inside of the protective cap 12 is protected from liquid by the fitting portion 20. Tightly and airtightly sealed. In the initial state, the end portion 12f of the protective cap 12 is fitted in the same position as the lower end of the seal portion 22b of the fitting portion 20. Further, in the initial state, the annular portion 28b of the pedestal spring 28 is in contact with the protective cap 12. However, in order to prevent the protective cap 12 from coming off during transportation, it is preferable that the protective cap 12 be assembled without strongly pressing the base spring 28.

In the protective cap assembly 10, the protective cap 12 is attached to the fitting part 20 using a positioning jig 30 in order to fit the protective cap 12 into the fitting part 20 at an appropriate position. The positioning jig 30 has a plate body 30a and a notch portion 30b into which the fitting portion 20 can be inserted. The positioning jig 30 is used by arranging the fitting part 20 in the notch 30b and placing the surrounding plate 30a on the support part 18. The plate body 30a is formed to have the same thickness as the distance from the upper surface of the support part 18 to the lower end of the seal part 22b. Therefore, when the outer cylinder part 12a of the protective cap 12 is pushed into the fitting part 20 so that the end part 12f contacts the plate body 30a, the inside of the protective cap 12 is sealed by the seal part 22b, and the pedestal spring 28 is strongly pressed. Can be assembled without pressing. Thereafter, by removing the positioning jig 30, the protective cap assembly 10 in which the protective cap 12 is fitted into the fitting portion 20 at an appropriate depth is obtained.

The pedestal 14 and protective cap assembly 10 of this embodiment are constructed as described above, and their functions will be described below.

The protective cap assembly 10 is provided to the user with the protective cap 12 fitted onto the base 14, as shown in FIG. In this state, as shown in FIG. 8, the sealing surface 22c of the fitting portion 20 and the inner circumferential surface 12h of the protective cap 12 are in close contact with each other, so that the inside of the protective cap 12 is sealed. The germicidal agent such as povidone-iodine released from the porous member (not shown) in the groove 12e of the protective cap 12 is prevented from flowing out, and the inside of the protective cap 12 is maintained in a sterile state.

In the protective cap assembly 10, the protective cap 12 is removed from the base 14 by the user. The protective cap 12 can be removed from the base 14 by simply pressing the protective cap 12 against the support portion 18 of the base 14 with a fingertip or the like and releasing the pressure on the protective cap 12.

Here, when the protective cap 12 is pressed toward the support portion 18 of the pedestal 14, the pedestal 14 is deformed as shown in FIG. At this time, the protective cap 12 is pushed toward the support portion 18 while the inner peripheral surface 12h slides on the seal surface 22c of the seal portion 22b. The annular portion 28b of the pedestal spring 28 (pressure-receiving member 26) comes into contact with the inner cylindrical portion 12b of the protective cap 12 and receives a part of the pressing force against the protective cap 12, and the pedestal spring 28 elastically deforms while is transmitted to the upper end portion 24 of the fitting portion 20. The upper end portion 24 is curved downward to become convex due to the pressing force of the pedestal spring 28, and along with this curving, the upper end of the side wall portion 22 is deformed so as to be drawn inward. As a result, the seal portion 22b is deformed to reduce its diameter, and the close contact between the inner peripheral surface 12h of the protective cap 12 and the seal surface 22c is weakened.

When the user quickly releases the pressure on the protective cap 12 from the state shown in FIG. 9, the resilient force of the pedestal spring 28 causes the protective cap 12 to float up to follow the movement of the user's fingertips, and the protective cap 12 is fitted. It is displaced in a direction away from the joining part 20. The force generated by the base spring 28 causes the protective cap 12 to come off the fitting part 20. As described above, the user can remove the protective cap 12 simply by pressing the protective cap 12 with the fingertip of one hand.

The pedestal 14 and protective cap assembly 10 of this embodiment have the following effects.

The pedestal 14 of this embodiment relates to the pedestal 14 of the protective cap 12 that is attached via a screw structure to a connector 82 that connects a catheter 80 (medical tube) in a separable manner. The pedestal 14 includes a support portion 18 formed in a wider area than the inside of the protective cap 12, and a fitting that protrudes from the support portion 18 and is formed to be inserted into the inside of the protective cap 12 and close the inside of the protective cap 12. The fitting part 20 includes a side wall part 22 formed along the inside of the protective cap 12 and slidably in close contact with the protective cap 12, and an upper end part 24 that closes the upper end of the side wall part 22. and a pressure-receiving member 26 that protrudes from the upper end portion 24 and transmits the pressing force acting on the protective cap 12 to the upper end portion 24 while being elastically deformed when the protective cap 12 is pushed into the support portion 18 side. When pressed toward the support portion 18, the upper end portion 24 is deformed into a concave shape due to the pressing force via the pressure receiving member 26, and the side wall portion 22 is reduced in diameter, weakening the close contact between the protective cap 12 and the fitting portion 20. When the pressure on the protective cap 12 is released, the protective cap 12 is pushed up by the resilient force of the pressure receiving member 26, and the protective cap 12 is removed from the fitting portion 20.

According to the above configuration, it is possible to realize a pedestal 14 in which the protective cap 12 can be removed by one-handed operations such as pressing the protective cap 12 toward the support portion 18 of the pedestal 14 and releasing the pressure. Thereby, even if the user forgets to remove the protective cap 12 from the base 14 before connecting the protective cap 12 to the connector 82, the connecting operation can be performed.

In the pedestal 14 described above, the pressure receiving member 26 may include a coiled pedestal spring 28 joined to the upper end portion 24. With this configuration, a quick resilient force can be obtained by the pedestal spring 28. Further, the protective cap 12 can be quickly removed before the adhesiveness between the fitting part 20 (side wall part 22) and the protective cap 12 is restored, and the fitting can be reliably released.

In the pedestal 14 described above, the pedestal spring 28 has a plurality of spiral column parts 28a and an annular part 28b that connects the upper ends of the plurality of spiral column parts 28a in the circumferential direction. It may be configured to abut against the cylindrical portion 12b. With this configuration, by using a plurality of springs, a large elastic force can be obtained with a small stroke, and the release operation becomes easy. Further, by providing the annular portion 28b, the load can be transmitted evenly in the circumferential direction of the upper end portion 24. Further, although rotational displacement occurs due to the deformation of the pedestal spring 28, the annular portion 28b slides smoothly on the inner cylindrical portion 12b of the protective cap 12, resulting in smooth operation.

In the above-described pedestal 14, the side wall portion 22 may have a seal portion 22b formed on the upper end side to have a larger diameter than the lower end side and tightly contact the inner peripheral surface 12h of the protective cap 12. The diameter of the upper end of the side wall portion 22 is further reduced as the upper end portion 24 is deformed into a concave shape. By providing the seal portion 22b in this portion, the operation of pressing the protective cap 12 will surely have the effect of weakening the close contact between the protective cap 12 and the fitting portion 20, and the protective cap 12 can be easily removed. Become.

In the pedestal 14 described above, the fitting portion 20 may be integrally formed of a resin material with good sliding properties. This configuration facilitates displacement of the protective cap 12 and facilitates removal of the protective cap 12.

The protective cap assembly 10 of this embodiment includes a protective cap 12 that is attached to a connector 82 that is separably connected to the middle of a catheter 80 (medical tube) through a screw structure, and the protective cap 12 is fitted. The present invention relates to a protective cap assembly 10 comprising a base 14 and a base 14 . The pedestal 14 includes a support portion 18 formed in a wider area than the inside of the protective cap 12, and a fitting that protrudes from the support portion 18 and is formed to be inserted into the inside of the protective cap 12 and close the inside of the protective cap 12. The fitting part 20 includes a side wall part 22 formed along the inside of the protective cap 12 and slidably in close contact with the protective cap 12, and an upper end part 24 that closes the upper end of the side wall part 22. and a pressure-receiving member 26 that protrudes from the upper end portion 24 and transmits the pressing force acting on the protective cap 12 to the upper end portion 24 while being elastically deformed when the protective cap 12 is pushed into the support portion 18 side. When pressed toward the support portion 18, the upper end portion 24 is deformed into a concave shape due to the pressing force via the pressure receiving member 26, and the side wall portion 22 is reduced in diameter, weakening the close contact between the protective cap 12 and the fitting portion 20. When the pressure on the protective cap 12 is released, the protective cap 12 is pushed up by the resilient force of the pressure receiving member 26, and the protective cap 12 is removed from the fitting portion 20.

According to the protective cap assembly 10 described above, the protective cap 12 can be removed by one-handed operations such as pressing the protective cap 12 toward the support portion 18 of the pedestal 14 and releasing the pressure. Become. Thereby, even if the user forgets to remove the protective cap 12 from the base 14 before connecting the protective cap 12 to the connector 82, the connecting operation can be performed.

Although the present invention has been described above with reference to preferred embodiments, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the present invention. stomach.

DESCRIPTION OF SYMBOLS 10... Protective cap assembly 12... Protective cap 12b... Inner cylinder part 12h... Inner peripheral surface 14... Pedestal 18... Support part 20... Fitting part 22... Side wall part 22b... Seal part 24... Upper end part 26... Pressure receiving member 28... Pedestal spring 28a...Spiral column part 28b...Annular part

Claims (6)

A pedestal for a protective cap that is attached via a screw structure to a connector that connects a medical tube in a separable manner,
a support portion formed in a wider area than the inside of the protective cap;
a fitting part that protrudes from the support part and is inserted into the protective cap so as to be able to close the inside of the protective cap, the fitting part comprising:
a side wall portion formed along the inside of the protective cap and slidably in close contact with the protective cap;
an upper end portion that closes the upper end of the side wall portion;
a pressure-receiving member that protrudes from the upper end and is elastically deformed when the protective cap is pushed toward the support part while transmitting a pressing force acting on the protective cap to the upper end;
When the protective cap is pressed toward the support portion, the upper end portion is deformed into a concave shape due to the pressing force via the pressure receiving member, and the diameter of the side wall portion is reduced to bring the protective cap and the fitting portion into close contact. is weakened,
When the pressing force on the protective cap is released, the protective cap is pushed up by the elastic force of the pressure receiving member, and the protective cap is removed from the fitting part.
pedestal. The pedestal according to claim 1, wherein the pressure receiving member has a coiled pedestal spring joined to the upper end portion. 3. The pedestal according to claim 2, wherein the pedestal spring has a plurality of spiral column parts and an annular part connecting upper ends of the plurality of spiral column parts in a circumferential direction, and the annular part is connected to the protective cap. A pedestal that comes into contact with the inner cylinder. The pedestal according to any one of claims 1 to 3, wherein the side wall portion has a seal portion formed on an upper end side with a larger diameter than on a lower end side and tightly contacts an inner circumferential surface of the protective cap. A pedestal is formed. 5. The pedestal according to claim 4, wherein the fitting portion is integrally formed of a resin material with good sliding properties. A protective cap that is attached via a screw structure to a connector that connects the middle of a medical tube in a separable manner;
A protective cap assembly comprising: a base to which the protective cap is fitted;
The pedestal is
a support portion formed in a wider area than the inside of the protective cap;
a fitting part that protrudes from the support part and is inserted into the protective cap so as to be able to close the inside of the protective cap, the fitting part comprising:
a side wall portion formed along the inside of the protective cap and slidably in close contact with the protective cap;
an upper end portion that closes the upper end of the side wall portion;
a pressure-receiving member that protrudes from the upper end and is elastically deformed when the protective cap is pushed toward the support part while transmitting a pressing force acting on the protective cap to the upper end;
When the protective cap is pressed toward the support portion, the upper end portion is deformed into a concave shape due to the pressing force via the pressure receiving member, and the diameter of the side wall portion is reduced to bring the protective cap and the fitting portion into close contact. is weakened,
When the pressing force on the protective cap is released, the protective cap is pushed up by the elastic force of the pressure receiving member, and the protective cap is removed from the fitting part.
Protective cap assembly.

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