Suction valve body structure of endoscope

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a suction valve body structure of an endoscope. In order to solve the problem that operation of medical staff is inconvenient in the prior art, the suction valve body structure of the endoscope comprises a base provided with a connecting port and a valve body assembly provided with a suction port, a liquid passing cavity is formed in the valve body assembly, a valve rod is further arranged in the liquid passing cavity, and the valve rod is connected with the connecting port. The first sealing piece and the second sealing piece are located at the two ends of the valve rod respectively, the valve rod is in sealed connection with the valve body assembly through the first sealing piece or the second sealing piece, the valve body assembly is rotationally connected with the base, and one end of the second sealing piece is located between the valve rod and the valve body assembly. And the other end extends between the valve body assembly and the base. The valve body assembly and the base are rotationally connected, so that in the operation process, medical staff can change the direction and position of a suction opening by independently shifting the valve body assembly, the whole operation handle does not need to be shifted, and operation of the medical staff is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an endoscope suction valve body structure. Background Art

[0002] An endoscope is a detection instrument that integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, and software. It has an image sensor, an optical lens, a light source, a mechanical device, etc. It can enter the stomach through the mouth or enter the body through other natural channels. An endoscope can be used to see lesions that cannot be displayed by X-rays, so it is very useful for doctors. Endoscope systems are often equipped with a negative pressure aspirator to suck out fluids from the patient's body to facilitate surgery. However, in the prior art, the aspirator has a relatively fixed setting between the negative pressure suction port and the operating handle during the operation, and the direction of the negative pressure suction port can only be changed by shifting the direction of the handle, which is inconvenient for medical staff to operate.

[0003] For example, a Chinese invention patent application has been filed for a suction valve and an endoscope [application number: CN202311294518.6]. The invention application includes: a valve body, wherein the valve body has a valve cavity, and the valve body is provided with a negative pressure channel and a sample channel connected to the valve cavity; a valve cap, wherein the valve cap is fixed to the valve body, the valve cap has a pressing portion, the circumferential side wall of the pressing portion is elastic, and the circumferential side wall of the pressing portion is provided with an atmospheric channel; a valve stem, wherein the valve stem has a pressing end and a blocking end relative to each other, the blocking end of the valve stem is movably arranged in the valve cavity, so that the blocking end of the valve stem can be switched between a closed position and a suction position, a buffer space is defined between the pressing end of the valve stem and the valve cap, and the buffer space is connected to the atmospheric channel; the buffer space is located in the pressing direction of the suction valve, so that in the process of pressing the end of the pressing portion, the pressing portion is deformed to compress the buffer space and block the atmospheric channel, and the pressing portion is configured to press and drive the pressing end of the valve stem after blocking the atmospheric channel.

[0004] This invention application has the advantage of preventing the pathological samples in the sample channel from directly reaching the atmospheric channel and attaching residues, but it still does not solve the above-mentioned problem. Summary of the invention

[0005] The object of the present invention is to provide an endoscope suction valve body structure in view of the above-mentioned problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An endoscope suction valve body structure comprises a base provided with a connecting port and a valve body assembly provided with a suction port, wherein the valve body assembly has a liquid passage cavity, the connecting port and the suction port are both connected to the liquid passage cavity, a valve stem is also provided in the liquid passage cavity, a first sealing member and a second sealing member are respectively located at two end positions of the valve stem, the valve stem is sealedly connected to the valve body assembly via the first sealing member or sealedly connected to the valve body assembly via the second sealing member, the valve body assembly is rotatably connected to the base, one end of the second sealing member is located between the valve stem and the valve body assembly, and the other end extends between the valve body assembly and the base.

[0008] In the above-mentioned endoscope suction valve body structure, the cross section of the second sealing member is "C"-shaped.

[0009] In the above-mentioned endoscope suction valve body structure, the second sealing member includes an outer sealing lip, a sealing surface and an inner sealing lip connected in sequence, and a sealing cavity is provided between the outer sealing lip and the inner sealing lip. The outer sealing lip is located between the valve stem and the valve body assembly, the sealing surface is located between the valve body assembly and the base, and one end of the valve body assembly extends into the sealing cavity.

[0010] In the above-mentioned endoscope suction valve body structure, the first sealing member includes a sealing ring sleeved on the valve stem, and the sealing ring can be pressed against the inner surface of the valve body assembly by moving the valve stem.

[0011] In the above-mentioned endoscope suction valve body structure, the valve body assembly includes a valve body with a liquid cavity inside, a valve cap is provided at one end of the valve body, a spring is also provided between the valve body and the valve cap, and one end of the valve stem rests on the valve cap.

[0012] In the above-mentioned endoscope suction valve body structure, the axis lines of the spring, the valve cap and the valve stem coincide with each other.

[0013] In the above-mentioned endoscope suction valve body structure, the valve stem includes a rod body with a hollow cavity inside, and a plurality of through holes are opened on the side wall of the rod body. The hollow cavity is connected with the liquid cavity through the through holes.

[0014] In the above-mentioned endoscope suction valve body structure, an anti-sway boss is protruded from the outer surface of the rod body, and the outer surface of the anti-sway boss is in contact with the inner surface of the valve body assembly.

[0015] In the above-mentioned endoscope suction valve body structure, the outer surface of the valve body assembly on one side close to the base is provided with an arc-shaped rotation groove, and the rotation groove is recessed into the interior of the valve body assembly. The inner surface of the base protrudes with a protrusion that can cooperate with the rotation groove. The surface of the valve body assembly is also provided with a snap-in groove connected to the rotation groove, and the protrusion slides along the snap-in groove into the rotation groove.

[0016] In the above-mentioned endoscope suction valve body structure, a check block is provided at the connection between the snap-in groove and the rotation groove, the upper end of the check block is provided with a plane for limiting, and the lower end is provided with an inclined surface for guiding, the upper end of the protrusion is provided with an inclined surface for guiding, and the lower end is provided with a plane for limiting.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The present invention utilizes the second sealing member to simultaneously achieve the sealing between the valve body assembly and the base and the sealing between the valve body assembly and the valve stem, thereby realizing the setting of a rotational connection between the valve body assembly and the base, so that during the operation, the medical staff can change the direction of the suction port by turning the valve body assembly alone without shifting the entire operating handle, thereby facilitating the operation of the medical staff.

[0019] 2. The present invention utilizes a check block and a convex block with a guiding slope at one end and a limited position plane at the other end to realize rapid installation and anti-dropping between the valve body assembly and the base, and the assembly is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 is a cross-sectional view of the present invention;

[0022] Figure 3 An exploded view of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a part of the structure of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the base;

[0025] In the figure: connecting port 1, base 2, suction port 3, valve body assembly 4, liquid cavity 5, valve stem 6, first sealing member 7, second sealing member 8, rotating groove 9, protrusion 10, snap-in groove 11, check block 12, valve body 41, valve cap 42, spring 43, rod body 61, hollow cavity 62, through hole 63, anti-sway boss 64, sealing ring 71, outer sealing lip 81, inner sealing lip 82, sealing surface 83, sealing cavity 84. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Combination Figure 1 and Figure 2As shown, an endoscope suction valve body structure comprises a base 2 provided with a connection port 1 and a valve body assembly 4 provided with a suction port 3, the base 2 is fixedly connected to the operating handle, the valve body assembly 4 has a liquid passage cavity 5, the connection port 1 and the suction port 3 are both connected to the liquid passage cavity 5, a valve stem 6 is also provided in the liquid passage cavity 5, a first sealing member 7 and a second sealing member 8 are respectively located at the two end positions of the valve stem 6, the two end positions here are only a description of the relative position between the sealing member and the valve stem 6, and do not limit the sealing member to be connected to the two ends of the valve stem 6. The valve stem 6 is sealedly connected to the valve body assembly 4 through the first sealing member 7 or sealedly connected to the valve body assembly 4 through the second sealing member 8, the valve body assembly 4 is rotatably connected to the base 2, one end of the second sealing member 8 is located between the valve stem 6 and the valve body assembly 4, and the other end extends between the valve body assembly 4 and the base 2.

[0028] In the prior art, the valve body assembly 4 and the base 2 are mostly formed in one piece or fixedly connected. Such a setting means that when the suction port 3 needs to adjust its direction and position, it needs to adjust the direction and position of the base 2, that is, adjust the operating handle. This limits the flexibility of the operation during the operation. Therefore, the present invention adjusts the valve body assembly 4 and the base 2 to a rotating connection, so that the direction and position of the suction port 3 can be adjusted by simply turning the valve body assembly 4, and the flexibility is greatly improved. However, after the rotating connection is adopted, the sealing between the valve body assembly 4 and the base 2 is significantly reduced. In actual use, there is a problem that part of the liquid in the liquid cavity 5 leaks from the gap between the valve body assembly 4 and the base 2. Therefore, the present invention fixes the second sealing member 8 on the valve body assembly 4, rather than fixing it on the valve stem 6 as is customary in the prior art, and at the same time, the second sealing member 8 is appropriately extended so that one end extends between the valve body assembly 4 and the base 2 to achieve sealing between the valve body assembly 4 and the base 2. A second sealing member 8 is used to achieve sealing between the two groups of structures. Therefore, the present invention uses the second sealing member 8 to simultaneously achieve sealing between the valve body assembly 4 and the base 2 and sealing between the valve body assembly 4 and the valve stem 6, thereby setting the valve body assembly 4 and the base 2 as a rotational connection. During the operation, the medical staff can change the direction of the suction port 3 by simply turning the valve body assembly 4 without shifting the entire operating handle, thereby facilitating the operation of the medical staff.

[0029] In the present invention, when in use, the suction port 3 is connected to an external negative pressure source, the base 2 is connected to the operating handle, and is connected to the patient's cavity through the connecting port 1. Under normal conditions, the valve stem 6 is pressed on the second sealing member 8 to achieve sealing, and the negative pressure cannot be transmitted to the connecting port 1. When liquid needs to be sucked, the first sealing member 7 is sealed with the inner surface of the valve body assembly 4 by moving the valve stem 6, and the second sealing member 8 is separated from the valve stem 6. At this time, the negative pressure is transmitted to the connecting port 1, and the liquid in the patient's cavity is sucked out into the liquid cavity 5 through the connecting port 1, and finally discharged from the suction port 3.

[0030] Preferably, if Figure 2 As shown, the second sealing member 8 comprises an outer sealing lip 81, a sealing surface 83 and an inner sealing lip 82 connected in sequence, a sealing cavity 84 is provided between the outer sealing lip 81 and the inner sealing lip 82, the outer sealing lip 81 is located between the valve stem 6 and the valve body assembly 4, the sealing surface 83 is located between the valve body assembly 4 and the base 2, and one end of the valve body assembly 4 extends into the sealing cavity 84. The second sealing member 8 adopts such a specific structure, which can improve the sealing effect between the base 2 and the valve body assembly 4 and improve the reliability of the connection between the valve body assembly 4 and the second sealing member 8.

[0031] like Figure 2 As shown, the first sealing member 7 includes a sealing ring 71 sleeved on the valve stem 6, and the sealing ring 71 can be pressed against the inner surface of the valve body assembly 4 by moving the valve stem 6. By moving the valve stem 6, the sealing ring 71 is pressed against the inner surface of the valve body assembly 4 or separated from the inner surface of the valve body assembly 4, so as to switch the sealing or non-sealing state.

[0032] Combination Figure 2 and Figure 3 As shown, the valve body assembly 4 includes a valve body 41 having a liquid passage cavity 5 therein, a valve cap 42 is provided at one end of the valve body 41, a spring 43 is further provided between the valve body 41 and the valve cap 42, and one end of the valve stem 6 abuts against the valve cap 42. In a normal state, the valve cap 42 and the valve stem 6 are subjected to an upward elastic force exerted by the spring 43, so that the lower end of the valve stem 6 is sealed with the first sealing member 8. When negative pressure suction is required, the medical staff presses the valve cap 42 to move the valve stem 6 downward, at which time the spring 43 is compressed, the lower end of the valve stem 6 is separated from the first sealing member 8, and the upper end is sealed with the valve body assembly 4 through the first sealing member 7.

[0033] Preferably, the axis lines of the spring 43, the valve cap 42 and the valve stem 6 coincide with each other, so as to ensure that the motion trajectory during pressing and rebounding is more controllable.

[0034] like Figure 3As shown, the valve stem 6 includes a rod body 61 having a hollow cavity 62 therein, and a plurality of through holes 63 are formed on the side wall of the rod body 61, and the hollow cavity 62 is connected to the liquid passage cavity 5 through the through holes 63. The liquid sucked into the liquid passage cavity 5 can be discharged to the suction port 3 through the through holes 63 and the hollow cavity 62, thereby ensuring smooth liquid circulation.

[0035] Preferably, the outer surface of the rod body 61 further protrudes with an anti-sway boss 64, and the outer surface of the anti-sway boss 64 fits with the inner surface of the valve body assembly 4. The provision of the anti-sway boss 64 can prevent the rod body 61 from being disturbed in the radial direction in the liquid passage cavity 5. The anti-sway boss 64 is preferably an arc with a notch, that is, it does not adopt a ring structure connected end to end. The use of a complete ring structure will affect the smoothness of the liquid flowing in the liquid passage cavity 5.

[0036] Combination Figure 4 and Figure 5 As shown, the outer surface of the valve body assembly 4 on one side close to the base 2 is provided with an arc-shaped rotation groove 9, and the rotation groove 9 is recessed into the valve body assembly 4. The inner surface of the base 2 protrudes with a protrusion 10 that can cooperate with the rotation groove 9. The surface of the valve body assembly 4 is also provided with a snap-in groove 11 connected to the rotation groove 9, and the protrusion 10 slides into the rotation groove 9 along the snap-in groove 11.

[0037] Preferably, a check block 12 is provided at the connection between the snap-in groove 11 and the rotation groove 9, the upper end of the check block 12 is provided with a plane for limiting, and the lower end is provided with an inclined surface for guiding, and the upper end of the protrusion 10 is provided with an inclined surface for guiding, and the lower end is provided with a plane for limiting. The present invention uses a check block with a guiding inclined surface at one end and a limiting plane at the other end and a protrusion to achieve rapid installation and anti-slip between the valve body assembly 4 and the base 2, and the assembly is convenient and reliable.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0039] Although the present invention uses the terms such as connection port 1, base 2, suction port 3, valve body assembly 4, liquid passage cavity 5, valve stem 6, first sealing member 7, second sealing member 8, rotation groove 9, projection 10, insertion groove 11, check block 12, valve body 41, valve cap 42, spring 43, rod body 61, hollow cavity 62, through hole 63, anti-swaying boss 64, sealing ring 71, outer sealing lip 81, inner sealing lip 82, sealing surface 83, sealing cavity 84, etc., it does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An endoscope suction valve body structure, comprising a base (2) provided with a connection port (1) and a valve body assembly (4) provided with a suction port (3), wherein the valve body assembly (4) has a liquid passage cavity (5), wherein the connection port (1) and the suction port (3) are both connected to the liquid passage cavity (5), wherein a valve stem (6) is further provided in the liquid passage cavity (5), wherein a first sealing member (7) and a second sealing member (8) are respectively located at two ends of the valve stem (6), wherein the valve stem (6) is sealedly connected to the valve body assembly (4) through the first sealing member (7) or is sealedly connected to the valve body assembly (4) through the second sealing member (8), wherein: The valve body assembly (4) is rotatably connected to the base (2); one end of the second sealing member (8) is located between the valve stem (6) and the valve body assembly (4), and the other end extends between the valve body assembly (4) and the base (2).

2. An endoscope suction valve body structure according to claim 1, characterized in that: The cross section of the second sealing member (8) is in a "C" shape.

3. The endoscope suction valve structure according to claim 1, characterized in that: The second sealing member (8) comprises an outer sealing lip (81), a sealing surface (83) and an inner sealing lip (82) which are connected in sequence, a sealing cavity (84) being provided between the outer sealing lip (81) and the inner sealing lip (82), the outer sealing lip (81) being located between the valve stem (6) and the valve body assembly (4), the sealing surface (83) being located between the valve body assembly (4) and the base (2), and one end of the valve body assembly (4) extending into the sealing cavity (84).

4. The endoscope suction valve structure according to claim 1, characterized in that: The first sealing member (7) comprises a sealing ring (71) sleeved on the valve stem (6); the sealing ring (71) can be pressed against the inner surface of the valve body assembly (4) by moving the valve stem (6).

5. The endoscope suction valve structure according to claim 1, characterized in that: The valve body assembly (4) comprises a valve body (41) having a liquid-passing cavity (5) therein; a valve cap (42) is provided at one end of the valve body (41); a spring (43) is provided between the valve body (41) and the valve cap (42); and one end of the valve stem (6) abuts against the valve cap (42).

6. An endoscope suction valve structure according to claim 5, characterized in that: The axial center lines of the spring (43), the valve cap (42) and the valve stem (6) coincide with each other.

7. An endoscope suction valve body structure according to claim 1, characterized in that: The valve stem (6) comprises a stem body (61) having a hollow cavity (62) therein, and a plurality of through holes (63) are provided on the side wall of the stem body (61). The hollow cavity (62) is connected to the liquid passage cavity (5) through the through holes (63).

8. An endoscope suction valve structure according to claim 7, characterized in that: The outer surface of the rod body (61) is also provided with an anti-swaying boss (64), and the outer surface of the anti-swaying boss (64) is in contact with the inner surface of the valve body assembly (4).

9. An endoscope suction valve structure according to claim 1, characterized in that: The outer surface of the valve body assembly (4) on one side close to the base (2) is provided with an arc-shaped rotation groove (9), and the rotation groove (9) is recessed into the interior of the valve body assembly (4). The inner surface of the base (2) is provided with a protrusion (10) that can cooperate with the rotation groove (9). The surface of the valve body assembly (4) is also provided with a snap-in groove (11) that is connected to the rotation groove (9), and the protrusion (10) slides along the snap-in groove (11) into the rotation groove (9).

10. An endoscope suction valve structure according to claim 9, characterized in that: A check block (12) is provided at the connection between the snap-in groove (11) and the rotation groove (9); the check block (12) has a plane for limiting at its upper end and an inclined surface for guiding at its lower end; the convex block (10) has an inclined surface for guiding at its upper end and a plane for limiting at its lower end.

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