A sheath connection structure

Abstract

The utility model discloses a sleeve connection structure, comprising a bracket connecting shaft, a bracket bearing, a first O-ring, a transfer tube, a sleeve sealing ring and an annular spur arranged on a handle, wherein the bracket connecting shaft is used to abut against the inner wall of the handle; the transfer tube is arranged in a channel of the bracket connecting shaft, and the transfer tube is used to be connected with an insertion tube; the bracket bearing is used to buckle on the inner wall of the sleeve, the sleeve is sleeved on the insertion tube, the bracket connecting shaft is connected to the bracket bearing, and the bracket bearing is provided with a first annular limiting groove; the first O-ring is arranged in the first limiting groove; the sleeve sealing ring is arranged between the handle and the bracket bearing, the annular spur and the sleeve sealing ring are pressed against each other, the sleeve sealing ring and the bracket bearing clamp the first O-ring, so that a first sealing structure is formed between the handle and the sleeve sealing ring, and a second sealing structure is formed between the sleeve sealing ring and the bracket bearing, thereby ensuring the waterproof sealing and reliability of the connection between the handle and the sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a sheath connection structure. Background Art

[0002] An endoscope is a device that can enter the human body through a natural orifice or a small incision made during surgery to assist in the diagnosis of diseases and the performance of surgery. The handle of the endoscope is connected to the insertion tube, and the handle and the insertion tube are connected through a conical sheath. The connection structure between the handle and the sheath is sealed by applying glue, but this method is less reliable and the seal still fails from time to time. When cleaning and repairing the endoscope, once the sheath is disassembled, the glue waterproof seal immediately fails and cannot be restored, and it is necessary to clean the residual glue and apply glue. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a sheath connection structure with good waterproof sealing and high reliability.

[0004] According to a sleeve connection structure of an embodiment of the utility model, it includes a bracket connecting shaft, a bracket bearing, a first O-ring, a transfer tube, a sleeve sealing ring and an annular protrusion arranged on the end face of the handle, the bracket connecting shaft is used to abut against the inner wall of the handle, one end of the bracket connecting shaft is provided with an external thread section, and the bracket connecting shaft is provided with a channel; the transfer tube is arranged in the channel, and the transfer tube is used to connect with the insertion tube; the bracket bearing is used to buckle on the inner wall of the sleeve, the sleeve is sleeved on the insertion tube, the inner wall of the bracket bearing is provided with an internal thread structure matching the external thread section, and the end face of one end of the bracket bearing is provided with a first annular limiting groove; the first O-ring is arranged in the first limiting groove; the sleeve sealing ring is arranged between the handle and the bracket bearing, so that a sealing structure is formed between the handle and the sleeve sealing ring and between the sleeve sealing ring and the bracket bearing.

[0005] At least the following beneficial effects are achieved:

[0006] The annular spur and the shaft sleeve sealing ring are squeezed against each other, and the shaft sleeve sealing ring and the bracket bearing clamp the first O-ring, so that the handle and the shaft sleeve sealing ring are squeezed against each other to form a first sealing structure, and the shaft sleeve sealing ring and the bracket bearing are squeezed against each other to form a second sealing structure, thereby ensuring the waterproof sealing and reliability of the connection between the handle and the sleeve. Compared with the method of applying glue, after the sleeve connecting structure is disassembled, the handle and the sleeve can be connected again through the sleeve connecting structure, and the waterproof sealing and reliability of the connection can still be ensured.

[0007] According to some embodiments of the utility model, a first shaft shoulder abutting against the shaft sleeve sealing ring is provided on the bracket connecting shaft.

[0008] According to some embodiments of the utility model, a second shoulder is further provided on the bracket connecting shaft, a first shoulder is provided on the inner wall of the handle, and the second shoulder abuts against the first shoulder.

[0009] According to some embodiments of the present invention, it also includes a second limiting groove arranged on the end surface of the handle, and the shaft sleeve sealing ring is arranged in the second limiting groove.

[0010] According to some embodiments of the utility model, it also includes a buckling portion arranged on the inner wall of the sleeve, and the middle section of the bracket bearing is provided with a buckling groove, and the buckling portion is buckled in the buckling groove.

[0011] According to some embodiments of the present invention, the outer diameter of one end of the bracket bearing, the outer diameter of the other end of the bracket bearing and the outer diameter of the middle section of the bracket bearing are gradually reduced so that the middle section of the bracket bearing forms the annular buckle groove.

[0012] According to some embodiments of the present invention, the outer diameter of one end of the bracket bearing is greater than or equal to the outer diameter of the shaft sleeve sealing ring.

[0013] According to some embodiments of the utility model, it also includes a stepped hole structure arranged on the end face of the sleeve, the outer wall of one end of the bracket bearing is provided with an annular flange, the flange is flush with the end face of one end of the bracket bearing, the flange is used to abut against the end face of the handle, and the flange and one end of the bracket bearing are both abutted against the inner wall of the stepped hole structure.

[0014] According to some embodiments of the utility model, the inner wall of the channel is provided with a second annular shoulder, the outer wall of the transfer tube is provided with a third axial shoulder, and the third axial shoulder abuts against the second shoulder to limit the transfer tube to be located in the channel.

[0015] According to some embodiments of the present invention, a second O-ring is provided between the inner wall of the channel and the outer wall of the transfer tube.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0020] Figure 3 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0021] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0022] Figure 5 It is a structural schematic diagram of the bracket bearing in the embodiment of the utility model;

[0023] Figure Number:

[0024] Bracket connecting shaft 100; external thread section 110; first shaft shoulder 120; second shoulder 130; second shaft shoulder 140;

[0025] Handle 200; second limiting groove 210; first shoulder 220;

[0026] Support bearing 300; first limiting groove 310; buckle groove 320; flange 330;

[0027] Sheath 400; buckle portion 410;

[0028] A first O-ring 500;

[0029] Shaft sleeve sealing ring 600;

[0030] Ring spur 700;

[0031] Transfer tube 800; third shaft shoulder 810;

[0032] Second O-ring 900 . DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 4 The utility model discloses a sheath connection structure, including a bracket connecting shaft 100, a bracket bearing 300, a first O-ring 500, a transfer tube 800, a sleeve sealing ring 600 and an annular thorn 700 arranged on the end surface of a handle 200. The bracket connecting shaft 100 is used to abut against the inner wall of the handle 200. One end of the bracket connecting shaft 100 is provided with an external thread section 110, and the bracket connecting shaft 100 is provided with a channel.

[0038] Reference Figure 2 , the adapter tube 800 is arranged in the channel, and the adapter tube 800 is used to connect with the insertion tube; the bracket bearing 300 is used to buckle on the inner wall of the sheath 400, and the sheath 400 is sleeved on the insertion tube. The inner wall of the bracket bearing 300 is provided with an internal thread structure that matches the external thread section 110, refer to Figure 2 and Figure 5 A first annular limiting groove 310 is provided on the end surface of one end of the bracket bearing 300; a first O-ring 500 is provided in the first limiting groove 310; a sleeve sealing ring 600 is provided between the handle 200 and the bracket bearing 300, so that a sealing structure is formed between the handle 200 and the sleeve sealing ring 600 and between the sleeve sealing ring 600 and the bracket bearing 300.

[0039] It can be understood that the first O-ring 500 and the sleeve sealing ring 600 are elastic. When assembling the endoscope, first connect the adapter tube 800 to the insertion tube, insert the adapter tube 800 and the insertion tube into the channel of the bracket connecting shaft 100, insert the bracket connecting shaft 100, the adapter tube 800 and the insertion tube into the handle 200, so that the bracket connecting shaft 100 is against the inner wall of the handle 200, then buckle the bracket bearing 300 on the inner wall of the sleeve 400, and then set the first O-ring 500 in the first limiting groove 310, and place the sleeve sealing ring 600 on the end face of one end of the first O-ring 500 and the bracket bearing 300, then put the sleeve sealing ring 600, the first O-ring 500, the bracket bearing 300 and the sleeve 400 on the insertion tube and the bracket connecting shaft 100, and finally tighten the external thread section 110 and the internal thread structure, and the handle 200 and the sleeve 400 clamp the bracket bearing 300, the first O-ring 500 and the sleeve sealing ring 600.

[0040] The annular spur 700 and the sleeve sealing ring 600 are squeezed against each other, and the sleeve sealing ring 600 and the bracket bearing 300 clamp the first O-ring 500, so that the handle 200 and the sleeve sealing ring 600 are squeezed against each other to form a first sealing structure, and the sleeve sealing ring 600 and the bracket bearing 300 are squeezed against each other to form a second sealing structure, thereby ensuring the waterproof sealing and reliability of the connection between the handle 200 and the sleeve 400. Compared with the method of applying glue, after the sleeve connection structure is disassembled, the handle 200 and the sleeve 400 can be connected again through the sleeve connection structure, and the waterproof sealing and reliability of the connection can still be ensured.

[0041] Reference Figure 2 In some of the embodiments, a first shaft shoulder 120 is provided on the bracket connecting shaft 100, and the first shaft shoulder 120 can be against the sleeve sealing ring 600. The first shaft shoulder 120 can press the sleeve sealing ring 600 against the first O-ring 500 and the bracket bearing 300, and play a role in positioning the sleeve sealing ring 600.

[0042] Reference Figure 2 In some embodiments, a second shoulder 140 is further provided on the bracket connecting shaft 100, and a first shoulder 220 is provided on the inner wall of the handle 200. The second shoulder 140 can abut against the first shoulder 220. When the external thread section 110 and the internal thread structure are tightened, the bracket connecting shaft 100 can be prevented from moving toward the bracket bearing 300, so that the handle 200 and the sleeve 400 are fixedly connected together.

[0043] Reference Figure 2In some of the embodiments, the sleeve connection structure also includes a second limiting groove 210 provided on the end surface of the handle 200, and the sleeve sealing ring 600 can be provided in the second limiting groove 210. The second limiting groove 210 serves to limit the sleeve sealing ring 600 to avoid the sleeve sealing ring 600 from being offset, thereby ensuring that the sleeve sealing ring 600 and the bracket bearing 300 accurately clamp the first O-ring 500.

[0044] Reference Figure 2 and Figure 5 In some of the embodiments, the sleeve connection structure also includes a snap-fit ​​portion 410 arranged on the inner wall of the sleeve 400, and a snap-fit ​​groove 320 is provided in the middle section of the bracket bearing 300. The snap-fit ​​portion 410 can be snapped into the snap-fit ​​groove 320, thereby connecting the bracket bearing 300 to the sleeve 400.

[0045] In some of the embodiments, the outer diameter of one end of the support bearing 300, the outer diameter of the other end of the support bearing 300 and the outer diameter of the middle section of the support bearing 300 are gradually reduced so that an annular buckle groove 320 is formed in the middle section of the support bearing 300, and the two side walls of the buckle groove 320 correspond to the two ends of the support bearing 300, and the two side surfaces of the buckle portion 410 are respectively against the two side walls of the buckle groove 320, so as to limit the support bearing 300 on the sleeve 400.

[0046] It is understandable that the outer diameter of one end of the bracket bearing 300 is larger than the outer diameter of the other end of the bracket bearing 300, so as to facilitate the bracket bearing 300 to be placed on the sleeve 400. The bracket bearing 300 is arranged in the through hole, and the internal thread structure is arranged on the inner wall of the through hole.

[0047] In some of the embodiments, the outer diameter of one end of the support bearing 300 is greater than or equal to the outer diameter of the sleeve sealing ring 600, ensuring that one end of the support bearing 300 and the sleeve sealing ring 600 can completely clamp the first O-ring 500 and enable the sleeve sealing ring 600 and the first O-ring 500 to undergo elastic deformation.

[0048] Reference Figure 2 and Figure 5 In some embodiments, the sleeve connection structure also includes a stepped hole structure provided on the end surface of the sleeve 400, and the outer wall of one end of the bracket bearing 300 is provided with an annular flange 330, and the flange 330 is flush with the end surface of one end of the bracket bearing 300. The flange 330 is used to abut the end surface of the handle 200. The flange 330 and one end of the bracket bearing 300 can both abut the inner wall of the stepped hole structure, and the stepped hole structure serves to accommodate and position the flange 330 and one end of the bracket bearing 300, thereby ensuring a sealed connection among the handle 200, the bracket bearing 300 and the sleeve 400.

[0049] Reference Figure 2In some embodiments, an inner wall of the channel is provided with an annular second shoulder 130, and an outer wall of the transfer tube 800 is provided with a third shoulder 810, which can abut against the second shoulder 130. The third shoulder 810 serves to limit the transfer tube 800 within the channel, thereby preventing the transfer tube 800 from completely passing through the channel of the bracket connecting shaft 100 and moving toward the insertion tube / sheath 400.

[0050] Reference Figure 2 In some of the embodiments, a second O-ring 900 is provided between the inner wall of the channel and the outer wall of the transfer tube 800, and the second O-ring 900 serves to seal the gap between the inner wall of the channel and the outer wall of the transfer tube 800.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A sheath connection structure, characterized in that: include: A support connecting shaft (100) is used to abut against the inner wall of the handle (200), one end of the support connecting shaft (100) is provided with an external thread section (110), and a channel is provided on the support connecting shaft (100); A transfer tube (800) is disposed in the channel, and the transfer tube (800) is used to connect with the insertion tube; A support bearing (300) is used to buckle on the inner wall of a sleeve (400), wherein the sleeve (400) is sleeved on the insertion tube, and the inner wall of the support bearing (300) is provided with an internal thread structure matching the external thread section (110), and the end surface of one end of the support bearing (300) is provided with a first limiting groove (310) in the shape of an annulus; A first O-type sealing ring (500), arranged in the first limiting groove (310); A shaft sleeve sealing ring (600) and an annular spur (700) are provided on the end surface of the handle (200); the shaft sleeve sealing ring (600) is provided between the handle (200) and the bracket bearing (300), so that a sealing structure is formed between the handle (200) and the shaft sleeve sealing ring (600) and between the shaft sleeve sealing ring (600) and the bracket bearing (300).

2. A sheath connection structure according to claim 1, characterized in that: The bracket connecting shaft (100) is provided with a first shaft shoulder (120) which abuts against the shaft sleeve sealing ring (600).

3. A sheath connection structure according to claim 1, characterized in that: The bracket connecting shaft (100) is also provided with a second shaft shoulder (140), the inner wall of the handle (200) is provided with a first shoulder (220), and the second shaft shoulder (140) abuts against the first shoulder (220).

4. A sheath connection structure according to claim 1, characterized in that: It also includes a second limiting groove (210) arranged on the end surface of the handle (200), and the shaft sleeve sealing ring (600) is arranged in the second limiting groove (210).

5. A sheath connection structure according to claim 1, characterized in that: It also includes a buckling portion (410) arranged on the inner wall of the sleeve (400), a buckling groove (320) is provided in the middle section of the bracket bearing (300), and the buckling portion (410) is buckled in the buckling groove (320).

6. A sheath connection structure according to claim 5, characterized in that: The outer diameter of one end of the bracket bearing (300), the outer diameter of the other end of the bracket bearing (300) and the outer diameter of the middle section of the bracket bearing (300) are gradually reduced, so that the middle section of the bracket bearing (300) forms the annular buckle groove (320).

7. A sheath connection structure according to claim 5 or 6, characterized in that: The outer diameter of one end of the bracket bearing (300) is greater than or equal to the outer diameter of the shaft sleeve sealing ring (600).

8. A sheath connection structure according to claim 1, characterized in that: It also includes a stepped hole structure provided on the end surface of the sleeve (400), and an annular flange (330) is provided on the outer wall of one end of the bracket bearing (300), and the flange (330) is flush with the end surface of one end of the bracket bearing (300), and the flange (330) is used to abut against the end surface of the handle (200), and the flange (330) and one end of the bracket bearing (300) are both abutted against the inner wall of the stepped hole structure.

9. The sheath connection structure according to claim 1, characterized in that: The inner wall of the channel is provided with an annular second shoulder (130), and the outer wall of the transfer tube (800) is provided with a third axial shoulder (810), and the third axial shoulder (810) abuts against the second shoulder (130) so that the transfer tube (800) is limited in the channel.

10. A sheath connection structure according to claim 1 or 9, characterized in that: A second O-type sealing ring (900) is provided between the inner wall of the channel and the outer wall of the transfer tube (800).

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