CN112128402A - Communication device with dead cavity and infusion equipment comprising same - Google Patents

Abstract

The invention discloses a communication device with a dead cavity and infusion equipment comprising the same, wherein the communication device with the dead cavity comprises a shell; the communicating cavity and the flow channel are formed inside the shell and communicated with each other; the switch moves along the axial direction of the communicating cavity so as to open or close the flow passage; and the dead cavity is formed at the tail end of the communication cavity body along the axial direction, and the switch is limited by the communication cavity body so as to avoid entering the dead cavity. The switch can not enter a dead cavity through the limit. Due to the dead space, the end of the switch is not directly attached to the inner wall of the housing, so that a space is formed between the end of the switch and the inner wall of the housing to contain air. Therefore, when the switch is moved, the air pressures on the two sides of the switch can be kept balanced to a certain degree, so that the resistance of the switch is reduced, and the condition that the switch is locked in an initial state is avoided.

Description

Communication device with dead cavity and infusion equipment comprising same

Technical Field

The invention relates to a communication device with a dead cavity and infusion equipment comprising the same.

Background

In the prior art, for example, infusion devices and the like need to adopt some communication devices which can open and close the switching flow passage. Usually, the initial state of these connecting devices is the state of closing the runner, and at this moment, because the very big resistance of external negative pressure production, if there is silicone oil between the switch of connecting device and the casing simultaneously, can cause the adhesion, causes the unable problem of opening of connecting device.

Disclosure of Invention

The invention aims to overcome the defects that a communication device is difficult to open from an initial state and even cannot be opened in the prior art, and provides a communication device with a dead cavity and infusion equipment comprising the communication device.

The invention solves the technical problems through the following technical scheme:

a communication device with dead space, characterized in that it comprises:

a housing;

the communicating cavity and the flow channel are formed inside the shell and are communicated with each other;

a switch moving along the axial direction of the communicating cavity to open or close the flow passage;

a dead space formed at an end of the communicating chamber in an axial direction, the switch being restricted by the communicating chamber to avoid entering the dead space.

In this scheme, make the switch can not get into the dead space through spacing. Thus, in any state, the ends of the switch are separated by at least a dead space. Due to the dead space, the end of the switch is not directly attached to the inner wall of the housing, so that a space is formed between the end of the switch and the inner wall of the housing to contain air. Therefore, when the switch is moved, the air pressures on the two sides of the switch can be kept balanced to a certain degree, so that the resistance of the switch is reduced, and the condition that the switch is locked in an initial state is avoided.

Preferably, a blocking step is formed at a junction of the dead space and the communication cavity, and the blocking step is used for blocking an end of the switch to limit the switch from entering the dead space. The blocking step can be integrally formed with the shell, so that the processing is convenient. And meanwhile, the blocking step has a stable limiting effect.

Preferably, the dead space is formed by a part of a convex structure of the inner wall of the housing contacting with the switch part; or the dead space is formed by a part of a convex structure of the end surface of the switch contacting with an inner wall portion of the housing. Thereby forming dead spaces at the voids of the protruding structures by partial contact formation.

Preferably, the switch is rotated by itself to move in the axial direction of the communicating chamber. Of course, the switch may also be moved in the axial direction of the communicating chamber by any movement.

Preferably, the switch moves between an initial position and a final position along the axial direction of the communicating chamber, wherein in the initial position, the switch closes the flow passage; in the final position, the switch opens the flow passage.

Preferably, the initial position is closer to the dead space than the final position, wherein in the initial position, the end of the switch is separated from the housing by the dead space.

Preferably, the switch includes a blocking portion that moves within the communicating chamber to open or close the flow passage.

Preferably, a convex ring is formed on the surface of the blocking portion, a concave ring is formed on the inner wall of the communicating cavity, and the convex ring and the concave ring cooperate to close the gap between the inner wall of the communicating cavity and the blocking portion. The fit of the male and female rings may increase the tightness of the fit, thereby preventing leakage of the liquid.

Preferably, two convex rings are formed on the surface of the blocking part, and at least three concave rings are arranged on the inner wall of the communicating cavity, wherein in the initial position, the two convex rings are respectively positioned at two sides of the flow passage; in the final position, both of the collars are located on one side of the flow passage. In the initial position, the two convex rings are closed at two sides, so that liquid at the front end of the flow channel cannot flow into the rear end of the flow channel through the communication cavity. At final position, then the runner no longer has the separation with the intercommunication of intercommunication cavity, can guarantee the continuous circulation of liquid, and the bulge loop of one side also can prevent that liquid from flowing out from the side simultaneously.

Preferably, the number of the convex rings is two, the number of the concave rings is three, and the spacing distance between the adjacent concave rings is the same as the spacing distance between the two convex rings. The three concave rings arranged at equal intervals are adopted, so that the number of the concave rings can be limited to the maximum extent under the condition that the convex rings and the concave rings can be matched at the initial position and the final position, the extending distance of the communicating cavity is reduced, and the size of the shell and the size of the communicating device with a dead cavity are further reduced.

Preferably, one side of the flow passage is provided with one concave ring, and the other side of the flow passage is provided with two concave rings.

Preferably, the material of the blocking portion is a flexible material. The material of the blocking portion may further be rubber or silicone, whereby a better sealing effect may be achieved.

Preferably, the switch further comprises a handle portion, the handle portion is directly or indirectly connected to the blocking portion, and the handle portion is located outside the housing. During operation, the blocking part in the cavity can be directly moved and communicated through the handle part, so that the use is convenient.

Preferably, the switch further comprises a connecting shaft, and the connecting shaft is arranged in the communicating cavity in a penetrating mode so as to connect the blocking portion and the handle portion.

Preferably, a jaw which opens towards the blocking portion is arranged on the connecting shaft, and a limiting step is formed on the inner wall of the communicating cavity, wherein in the final position, the limiting step blocks the jaw to prevent the switch from moving towards the initial position. The opening orientation of the clamping jaw enables the clamping jaw to clamp the limiting step at the final position, and the switch is prevented from retreating.

Preferably, the housing has a projecting cylindrical end, the handle portion has a circumferential side wall therearound, and in the initial position, the circumferential side wall is threadedly engaged with the cylindrical end inwardly thereof. The switch can be prevented from being opened by mistaken touch in the initial position through a thread fit mode.

An infusion device, characterized in that it comprises said communication means with dead space.

The positive progress effects of the invention are as follows: the switch can not enter a dead cavity through the limit. Thus, in any state, the ends of the switch are separated by at least a dead space. Due to the dead space, the end of the switch is not directly attached to the inner wall of the housing, so that a space is formed between the end of the switch and the inner wall of the housing to contain air. Therefore, when the switch is moved, the air pressures on the two sides of the switch can be kept balanced to a certain degree, so that the resistance of the switch is reduced, and the condition that the switch is locked in an initial state is avoided.

Drawings

Fig. 1 is a schematic view of an internal structure of a housing according to a preferred embodiment of the invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Fig. 4 is a schematic structural diagram of the blocking portion according to the preferred embodiment of the invention.

FIG. 5 is a schematic diagram of the internal structure of the preferred embodiment of the present invention in the initial position.

FIG. 6 is a schematic diagram of the internal structure of the preferred embodiment of the present invention in the final position.

Fig. 7 is an enlarged view of a portion a of fig. 6.

FIG. 8 is a schematic front view of a bump structure according to a first embodiment of the present invention.

FIG. 9 is a side view of a bump structure according to a first embodiment of the present invention.

FIG. 10 is a schematic front view of a bump structure according to a second embodiment of the present invention.

FIG. 11 is a side view of a bump structure according to a second embodiment of the present invention.

Fig. 12 is a schematic front view of a third embodiment of a bump structure according to a preferred embodiment of the invention.

FIG. 13 is a side view of a third embodiment of a bump structure according to the preferred embodiment of the invention.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1 to 7, the present embodiment discloses a communication device with a dead space, which includes a housing 1, a communication cavity 2, a dead space 3, a flow channel 4, and a switch 5.

As shown in fig. 1, 2 and 3, the communication device with dead space of the present embodiment includes a housing 1. The housing 1 may be manufactured by various processes such as injection molding. The cavity inside the housing 1 forms a communicating cavity 2 and a flow channel 4, the communicating cavity 2 and the flow channel 4 are formed inside the housing 1, and the communicating cavity 2 and the flow channel 4 are communicated with each other. As shown in fig. 1, in this embodiment, the flow channel 4 is vertically communicated with the communicating cavity 2 in a crossing manner, so that the flow channel 4 can be blocked by blocking the through position where the flow channel 4 is vertically communicated with the communicating cavity 2.

As shown in fig. 4, 5 and 6, the communication device with dead space of the present embodiment includes a switch 5, and the switch 5 moves along the axial direction of the communication chamber 2 to open or close the flow passage 4. The switch 5 is preferably in the present embodiment in the form of a cylinder as a whole to facilitate rotation.

As shown in fig. 1, 5 and 6, the communication device with dead space of the present embodiment includes a dead space 3, the dead space 3 is formed at the end of the communication chamber 2 in the axial direction, and the switch 5 is restricted by the communication chamber 2 to avoid entering the dead space 3. The dead space 3 is a space physically existing by the arrangement of the structure, and is not affected by the movement of the switch 5, and it is still present in the most proximal state of the switch 5.

In this scheme, make switch 5 can not get into dead space 3 through spacing. Thus, in any state, the end of the switch 5 is at least separated by a dead space 3. Due to the dead space 3, the end of the switch 5 does not directly stick to the inner wall of the housing 1, so that a space is formed between the end of the switch 5 and the inner wall of the housing 1 to contain air. Therefore, when the switch 5 is moved, the air pressures on both sides of the switch 5 can be balanced to some extent, so that the resistance of the switch 5 is reduced, and the condition that the switch 5 is locked in the initial state is avoided.

As shown in fig. 1 and 2, a blocking step 11 is formed at a boundary between the dead space 3 and the communicating chamber 2, and the blocking step 11 is used for blocking an end of the switch 5 to limit the switch 5 from entering the dead space 3. The blocking step 11 can be integrally formed with the housing 1, which facilitates processing. And meanwhile, the blocking step 11 has a stable limiting effect.

In this embodiment, the switch 5 is rotated by itself to move in the axial direction of the communicating chamber 2. Of course, the switch 5 can also be moved in the axial direction of the communicating chamber 2 by any movement.

As shown in fig. 5 and 6, the switch 5 of the present embodiment is moved along the axial direction of the communicating chamber 2 between an initial position shown in fig. 5, in which the switch 5 closes the flow passage 4, and a final position shown in fig. 6; in the final position, the switch 5 opens the flow channel 4.

As shown in fig. 5 and 6, the initial position, in which the end of the switch 5 is separated from the housing 1 by the dead space 3, is closer to the dead space 3 than the final position. Independent of the extreme conditions of movement of the switch 5.

As shown in fig. 4, 5 and 6, the switch 5 of the present embodiment includes a blocking portion 51, and the blocking portion 51 moves in the communicating chamber 2 to open or close the flow passage 4. The dam portion 51 of the present embodiment is substantially cylindrical or other solid of revolution shape for ease of rotation and processing.

As shown in fig. 1, 4, 5 and 6, the surface of the blocking portion 51 of the present embodiment is formed with a convex ring 511, and the inner wall of the communicating chamber 2 is formed with a concave ring 14, and the convex ring 511 and the concave ring 14 cooperate to close the gap between the inner wall of the communicating chamber 2 and the blocking portion 51. The mating of male ring 511 and female ring 14 may increase the tightness of the mating, thereby preventing leakage of liquid.

As shown in fig. 1, 4, 5 and 6, the surface of the blocking portion 51 of the present embodiment is formed with two convex rings 511, and at least three concave rings 14 are disposed on the inner wall of the communicating cavity 2, wherein, in the initial position, the two convex rings 511 are respectively located at two sides of the flow passage 4; in the final position, both collars 511 are located on one side of the flow channel 4. In the initial position, the two convex rings 511 are closed on both sides so that the liquid at the front end of the flow channel 4 cannot flow into the rear end of the flow channel 4 through the communication chamber 2. At the final position, the communication between the flow channel 4 and the communicating cavity 2 is not blocked any more, so that the continuous circulation of the liquid can be ensured, and meanwhile, the convex ring 511 at one side can prevent the liquid from flowing out from the side.

As shown in fig. 1, 4, 5 and 6, the number of the convex rings 511 of the present embodiment is two, and the number of the concave rings 14 is three, wherein the distance between the adjacent concave rings 14 is the same as the distance between the two convex rings 511. By adopting three concave rings 14 arranged at equal intervals, the number of the concave rings 14 can be limited to the maximum extent under the condition that the convex ring 511 and the concave ring 14 can be matched at the initial position and the final position, so that the extending distance of the communicating cavity 2 is reduced, and the size of the shell 1 and the size of the communicating device with a dead cavity are further reduced.

As shown in fig. 1, one side of the flow passage 4 of the present embodiment is provided with a concave ring 14, and the other side of the flow passage 4 is provided with two concave rings 14.

In this embodiment, the blocking portion 51 is made of a flexible material. The material of the blocking portion 51 may further be rubber or silicone, and thus a better sealing effect may be achieved.

As shown in fig. 5, 6 and 7, the switch 5 of the present embodiment further includes a handle portion 52, the handle portion 52 is directly or indirectly connected to the blocking portion 51, and the handle portion 52 is located outside the housing 1. When in operation, the handle part 52 can directly move and communicate with the blocking part 51 in the cavity 2, thereby being convenient for use.

As shown in fig. 4, 5, 6 and 7, the switch 5 of the present embodiment further includes a connecting shaft 53, and the connecting shaft 53 is inserted into the communicating cavity 2 to connect the blocking portion 51 and the handle portion 52.

As shown in fig. 6 and 7, the connecting shaft 53 of the present embodiment is provided with a jaw 54 opened toward the blocking portion 51, and the inner wall of the communicating chamber 2 is formed with a limiting step 12, wherein, in the final position, the limiting step 12 blocks the jaw 54 to prevent the switch 5 from moving toward the initial position. The jaws 54 are open in such a direction that they can catch the limit step 12 in the final position, preventing the switch 5 from being withdrawn.

As shown in fig. 6 and 7, the housing 1 of the present embodiment has a projecting cylindrical end 13, and the handle portion 52 has a circumferential side wall 521 therearound, and in the initial position, the inner side of the circumferential side wall 521 is screw-engaged with the cylindrical end 13. The switch 5 can be prevented from being opened by mistaken touch in the initial position through the thread matching mode.

In the embodiment, the dead space 3 can also be formed by partially contacting the switch 5 with a convex structure on the inner wall of the shell 1; or the dead space 3 is formed by a partial convex structure of the end surface of the switch 5 contacting with the inner wall portion of the housing 1. Thereby forming dead spaces at the voids of the protruding structures by partial contact formation.

As shown in fig. 8 and 9, in a first embodiment, a plurality of ribs 61 are formed on the inner wall of the housing 1, and only the ribs 61 are in contact with the switch 5, so that the dead space 3 is formed at the gap of the ribs 61, and the inner wall of the housing 1 does not directly and completely contact the end of the switch 5. Of course, the rib 61 may be provided on the end of the switch 5.

As shown in fig. 10 and 11, in a second embodiment, a plurality of bumps 62 are formed on the inner wall of the housing 1, and only the bumps 62 are in contact with the switch 5, so that the dead space 3 is formed at the gap between the bumps 62, and the inner wall of the housing 1 does not directly and completely contact the end of the switch 5. Of course, the bumps 62 may also be provided on the ends of the switch 5.

As shown in fig. 12 and 13, in a third embodiment, the inner wall of the housing 1 is formed with a plurality of frustums 63, and only the frustums 63 are in contact with the switch 5, so that the dead space 3 is formed at the gap of the frustums 63, and the inner wall of the housing 1 does not directly and completely contact the end of the switch 5. Of course, the frustum 63 may also be provided on the end of the switch 5.

The present embodiment also discloses an infusion device, wherein the infusion device comprises a communication means with a dead space.

The switch can not enter a dead cavity through the limit. Thus, in any state, the ends of the switch are separated by at least a dead space. Due to the dead space, the end of the switch is not directly attached to the inner wall of the housing, so that a space is formed between the end of the switch and the inner wall of the housing to contain air. Therefore, when the switch is moved, the air pressures on the two sides of the switch can be kept balanced to a certain degree, so that the resistance of the switch is reduced, and the condition that the switch is locked in an initial state is avoided.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (17)

1. A communication device with dead space, comprising:

a housing;

the communicating cavity and the flow channel are formed inside the shell and are communicated with each other;

a switch moving along the axial direction of the communicating cavity to open or close the flow passage;

a dead space formed at an end of the communicating chamber in an axial direction, the switch being restricted by the communicating chamber to avoid entering the dead space.

2. The communication device with dead space as claimed in claim 1, wherein a blocking step is formed at the intersection of the dead space and the communication chamber, and the blocking step is used for blocking the end of the switch to limit the switch from entering the dead space.

3. The communication device with dead space as claimed in claim 1, wherein the dead space is formed by a part of a convex structure of an inner wall of the housing contacting the switch portion; or the dead space is formed by a part of a convex structure of the end surface of the switch contacting with an inner wall portion of the housing.

4. The communication device with dead space as set forth in claim 1, wherein said switch is moved in the axial direction of said communication chamber by rotating itself.

5. The communication device with dead space as claimed in claim 1, wherein said switch is moved between an initial position and a final position along an axial direction of said communication chamber, wherein said switch closes said flow path in said initial position; in the final position, the switch opens the flow passage.

6. A communication device with dead space as claimed in claim 5, characterized in that said initial position is closer to said dead space than said final position, wherein in said initial position the end of said switch is separated from said housing by said dead space.

7. The communication device with dead space of claim 6, wherein the switch includes a blocking portion that moves within the communication chamber to open or close the flow passage.

8. The communication device with dead space as claimed in claim 7, wherein the surface of the blocking portion is formed with a convex collar, and the inner wall of the communication chamber is formed with a concave collar, the convex collar and the concave collar cooperating to close the gap between the inner wall of the communication chamber and the blocking portion.

9. The communication device with dead space as claimed in claim 8, wherein the surface of the blocking portion is formed with two convex rings, and at least three concave rings are provided on the inner wall of the communication chamber, wherein, in the initial position, the two convex rings are respectively located at both sides of the flow passage; in the final position, both of the collars are located on one side of the flow passage.

10. The communication device with dead space as claimed in claim 9, wherein the number of said male rings is two and the number of said female rings is three, wherein the adjacent female rings are spaced apart by the same distance as the two male rings.

11. A communication device with dead space as claimed in claim 10, wherein one side of said flow path is provided with one said recessed ring and the other side of said flow path is provided with two said recessed rings.

12. A communication device with dead space as claimed in claim 7, wherein the material of the blocking portion is a flexible material.

13. A communication device with dead space as claimed in any of claims 7 to 12, wherein said switch further comprises a handle portion, said handle portion being directly or indirectly connected to said blocking portion, and said handle portion being located outside said housing.

14. The communication device with dead space as claimed in claim 13, wherein the switch further comprises a connection shaft inserted into the communication cavity to connect the blocking portion and the handle portion.

15. The communication device with dead space as claimed in claim 14, wherein the connection shaft is provided with a jaw opened toward the blocking portion, and a limit step is formed on an inner wall of the communication chamber, wherein, in the final position, the limit step blocks the jaw to prevent the switch from moving toward the initial position.

16. The dead-space communication device as defined in claim 13, wherein said housing has a projecting cylindrical end, said handle portion has a circumferential sidewall therearound, and an inner side of said circumferential sidewall is threadedly engaged with said cylindrical end in said initial position.

17. An infusion device comprising a communication means with dead space according to any of claims 1-16.

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