Leakage detection joint of medical endoscope

Abstract

The utility model discloses a leak hunting joint for a medical endoscope. The leak hunting joint comprises a valve body (1), a valve element (2) is arranged in the valve body (1) in a matched mode. A rotating cylinder (4) is arranged outside the valve body (1); a spiral groove (1a) is formed in the valve body (1); the device further comprises a rotating pin (3). The rotating pin (3) comprises a valve core assembling part (3a) and a rotating matching part (3b) which are integrated; the valve element (2) is provided with a pin hole (2a) in the radial direction. The valve core assembling part is in clearance fit with the pin hole (2a); and the rotary matching part (3b) is matched with the spiral groove (1a) and is matched with an inner side groove (4a) of the rotary cylinder (4). The device is simple in structure, convenient to operate, high in reliability and capable of effectively avoiding jamming after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more particularly to the detection of the sealing performance of endoscopes, and specifically to an airtight structure for endoscope inspection. Background Art

[0002] In the prior art, as described in CN209992130U for the airtightness detection device of electronic endoscopes, the spiral groove rotating fixing pin of the leak detection joint of the medical endoscope is threadedly connected to the valve core. Therefore, after long-term use, it is prone to looseness, resulting in the valve core being stuck, and thus the leak detection joint loses its normal function.

[0003] On the other hand, the valve locking pin often scratches the doctor's arm, affecting the use safety.

[0004] Therefore, those skilled in the art are committed to developing a leak detection joint for medical endoscopes with higher reliability. Summary of the Utility Model

[0005] In view of the above-mentioned defects of the prior art, the utility model discloses a water and gas button, and the technical problem to be solved is to provide a leak detection joint for medical endoscopes with higher reliability.

[0006] To achieve the above object, the utility model provides a leak detection joint for medical endoscopes, which includes a valve body; a valve core is fitted inside the valve body; a rotating cylinder is arranged outside the valve body; a spiral groove is arranged on the valve body; it further includes a rotating pin; the rotating pin includes an integrally formed valve core assembly part and a rotation fitting part; the valve core is provided with a pin hole in the radial direction; the valve core assembly part is in clearance fit with the pin hole; the rotation fitting part is in fit with the spiral groove and is in fit with the inner groove of the rotating cylinder.

[0007] Preferably, the end of the valve body away from the valve core is set as a leak detection cap installation part; the leak detection cap installation part includes a lock nut connection part and a housing installation part; a sealing groove is arranged between the lock nut connection part and the housing installation part; the housing installation part includes an integrally formed housing connection part and a limiting part; the outer diameter of the limiting part is larger than the outer diameter of the housing connection part.

[0008] Preferably, the axial surface of the valve core is provided with an exhaust plane.

[0009] Preferably, there are two exhaust planes, symmetrically arranged on both sides of the pin hole.

[0010] Preferably, one end of the valve core is provided with a rubber pad installation part, and the other end is provided with a gas blocking edge corresponding to the exhaust plane; the end of the exhaust plane away from the gas blocking edge is flush with the end face of the rubber pad installation part; the thickness of the gas blocking edge is less than the helix pitch of the rotating pin.

[0011] Preferably, the valve body is fixedly connected to the gland; a locking pin is provided on the gland; the locking pin includes a gland assembly part and a locking cover assembly part; a ring groove is provided between the gland assembly part and the locking cover assembly part; an assembly plane is provided on the cylindrical surface of the locking cover assembly part.

[0012] Preferably, the outer end of the locking cover assembly part is set to be a round head.

[0013] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple, the operation is convenient, and the reliability is high, which can effectively avoid jamming after long-term use. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a specific embodiment of the present utility model;

[0015] Figure 2 is Figure 1 the A-A sectional structural diagram of

[0016] Figure 3 is a schematic structural diagram of the valve body in a specific embodiment of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the rotating pin in a specific embodiment of the present utility model;

[0018] Figure 5 is a schematic structural diagram of the rotating cylinder in a specific embodiment of the present utility model;

[0019] Figure 6 is a schematic structural diagram of the valve core in a specific embodiment of the present utility model;

[0020] Figure 7 is a schematic structural diagram of the locking pin in a specific embodiment of the present utility model. Specific Embodiment

[0021] The following further describes the present utility model in conjunction with the drawings and embodiments. It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, and therefore should not be construed as a limitation of the present utility model. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] As Figures 1 to 7As shown in the figure, a leak detection joint for a medical endoscope includes a valve body 1, a valve core 2 is fitted inside the valve body 1, a rotating cylinder 4 is arranged outside the valve body 1, and a spiral groove 1a is arranged on the valve body 1. It also includes a rotating pin 3, the rotating pin 3 includes an integrally formed valve core assembly part 3a and a rotating fitting part 3b, the valve core 2 is provided with a pin hole 2a along the radial direction, the valve core assembly part is in clearance fit with the pin hole 2a, the rotating fitting part 3b is fitted with the spiral groove 1a and is also fitted with the inner groove 4a of the rotating cylinder 4.

[0023] The end of the valve body 1 far from the valve core 2 is set as a leak detection cap installation part, the leak detection cap installation part includes a lock nut connection part 1b and a housing installation part, a sealing groove 1d is arranged between the lock nut connection part 1b and the housing installation part, the housing installation part includes an integrally formed housing connection part 1c1 and a limiting part 1c2, and the outer diameter of the limiting part 1c2 is larger than the outer diameter of the housing connection part 1c1. When connecting the valve body 1 with a leak detection cap (not shown in the figure), the lock nut connection part 1b passes through the housing of the leak detection cap and is then fixed with a lock nut. The shape of the housing at this connection of the leak detection cap matches the shape of the housing installation part. When the leak detection joint is working, there is a tendency to generate a rotational movement under the drive of the lock cover. Due to the setting of the limiting part 1c2, the housing of the leak detection cap and the valve body can remain relatively stationary.

[0024] Two exhaust planes 2b are arranged on the axial surface of the valve core 2, symmetrically arranged on both sides of the pin hole 2a. One end of the valve core 2 is provided with a rubber pad installation part 2d, and the other end is provided with a gas blocking edge 2c at the corresponding exhaust plane 2b. Therefore, the axial length of the exhaust plane 2b is less than the axial length of the valve core 2, the end of the exhaust plane 2b far from the gas blocking edge 2c is flush with the end face of the rubber pad installation part 2d, and the thickness of the gas blocking edge 2c is less than the lead of the rotating pin 3.

[0025] The valve body 1 is fixedly connected with a gland 5, a locking pin 6 is arranged on the gland 5, the locking pin 6 includes a gland assembly part 5a and a lock cover assembly part 5c, a ring groove 5b is arranged between the gland assembly part 5a and the lock cover assembly part 5c, an assembly plane 5c1 is arranged on the cylindrical surface of the lock cover assembly part 5c, and the outer end of the lock cover assembly part 5c is set as a round head. Therefore, the gland and the lock cover can be connected more reliably, and due to the setting of the round head, it is not easy to scratch the doctor's arm.

[0026] When the leak detection joint for a medical endoscope is working, it is connected with a lock cover and a leak detection cap assembly (not shown in the figure), and then connected with the endoscope. Among them, the lock cover assembly part 5c of the locking pin 6 passes through the housing of the lock cover, and its end round head is exposed outside the lock cover. A lock cover pin corresponding to the outer groove of the rotating cylinder 4 is arranged on the lock cover.

[0027] When the valve core 2 is in the closed state, as Figure 2As shown, the rubber gasket 7 assembled inside the valve core 2 seals the axial air passage of the valve body 1. If the locking cover is rotated, the sliding groove of the locking cover will slide on the locking pin 6. Therefore, the locking cover pin drives the rotating cylinder 4 to rotate, so that the rotating pin 3 moves in the spiral groove 1a. Within the limit stroke of the spiral groove 1a, the valve core 2 is lifted upward in the Figure 2 direction shown. Since the thickness of the air blocking edge 2c is less than the spiral lift of the rotating pin 3, the above-mentioned movement can open the air passage of the valve body 1. If there is a leak in the endoscope, the leaked gas can flow into the locking cover through the air passage of the valve body and be detected by the leak detection instrument connected to the locking cover. To close the valve core 2, just make the locking cover perform an action in the opposite direction to the previous action.

[0028] Since the rotating pin 3 has a clearance fit with the pin hole 2a, no matter how many times the locking cover acts, the rotating pin 3 can move slightly within the range restricted by the pin hole 2a, thus avoiding the transmission failure of the rotating pin 3 and the jamming of the valve core.

[0029] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A leak detection joint for a medical endoscope, comprising a valve body (1); a valve core (2) is fitted inside the valve body (1); a rotating cylinder (4) is arranged outside the valve body (1); a spiral groove (1a) is arranged on the valve body (1); characterized in that: It further includes a rotating pin (3); the rotating pin (3) includes an integrally formed valve core assembly part (3a) and a rotating mating part (3b); the valve core (2) is provided with a pin hole (2a) in the radial direction; the valve core assembly part is in clearance fit with the pin hole (2a); the rotating mating part (3b) is in fit with the spiral groove (1a) and is also in fit with the inner groove (4a) of the rotating cylinder (4). The end of the valve body (1) away from the valve core (2) is set as a leak detection cap mounting part; the leak detection cap mounting part includes a lock nut connection part (1b) and a housing mounting part; a sealing groove (1d) is provided between the lock nut connection part (1b) and the housing mounting part; the housing mounting part includes an integrally formed housing connection part (1c1) and a limiting part (1c2); the outer diameter of the limiting part (1c2) is larger than the outer diameter of the housing connection part (1c1).

2. The medical endoscope leak detection joint according to claim 1, characterized in that: The valve core (2) is provided with an exhaust plane (2b) on its axial surface.

3. The leak detection joint for medical endoscope according to claim 2, wherein: There are two exhaust planes (2b), symmetrically arranged on both sides of the pin hole (2a).

4. The medical endoscope leak detection joint according to claim 2, wherein: One end of the valve core (2) is provided with a rubber pad mounting part (2d), and the other end is provided with a gas blocking edge (2c) corresponding to the exhaust plane (2b); one end of the exhaust plane (2b) away from the gas blocking edge (2c) is flush with the end face of the rubber pad mounting part (2d); the thickness of the gas blocking edge (2c) is less than the spiral lift of the rotating pin (3).

5. The leak detection joint of a medical endoscope according to claim 1, characterized in that: The valve body (1) is fixedly connected to the gland (5); a locking pin (6) is provided on the gland (5); the locking pin (6) includes a gland assembly part (5a) and a locking cover assembly part (5c); a ring groove (5b) is provided between the gland assembly part (5a) and the locking cover assembly part (5c); an assembly plane (5c1) is provided on the cylindrical surface of the locking cover assembly part (5c).

6. The leak detection joint for medical endoscope according to claim 5, wherein: The outer end of the locking cover assembly part (5c) is set as a round head.

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