Expansion tool for endoscope

Abstract

The utility model discloses an expansion tool for an endoscope, which is used for expanding a rubber tube. The device is characterized by comprising a shell with a negative pressure cavity, a front end cover movably connected to one end of the shell, a rear end cover arranged at the other end of the shell, an inner steel pipe arranged in the negative pressure cavity and used for assembling a rubber pipe, a plurality of open holes uniformly formed in the inner steel pipe, and a suction connector arranged on the shell and communicated with the negative pressure cavity, the negative pressure pump is communicated with the suction joint; wherein the rubber tube is inserted into the inner steel tube, the negative pressure pump injects negative pressure into the negative pressure cavity through the suction connector, then the negative pressure adsorbs and expands the rubber tube through the open hole, and the negative pressure cavity is vacuumized in the mode that the rubber tube is attached to the open hole in a sealed mode. By means of the inner steel pipe and the negative pressure pump, the attaching firmness of the end face of the rubber sleeve can be effectively enhanced, and the vacuum degree is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment accessories, in particular to an expansion tool for an endoscope. Background Art

[0002] An endoscope refers to a medical instrument that enters the human body through various tubes to observe the internal conditions of the human body. An endoscope can be used to see lesions that cannot be displayed by X-rays. An endoscopic snake-bone rubber dilator is a widely used instrument in the medical field, mainly used to assist the endoscope in entering difficult-to-reach areas inside the human body for inspection or treatment. The device is mainly composed of a snake-bone rubber and a dilator. The snake-bone rubber has good flexibility and elasticity and can bend with the bending of the endoscope, while the dilator is used to expand the entry path of the endoscope for better observation and treatment. The dilator in the prior art expands the rubber sleeve by external force, so that the rubber sleeve can achieve the expansion effect and thus be inserted into the curved snake bone. For example, an electric negative pressure device for conveniently adding an endoscope curved rubber with authorization number CN26961676U can reasonably and effectively adjust the expansion degree of the rubber sleeve through the control device of the electric negative pressure machine so as to facilitate the rubber sleeve of the curved snake bone of the endoscope. The utility model limits the endoscope curved rubber through the top cover and the bottom cover of the box. Since the endoscope curved rubber itself is an elastomer, the axial size accuracy after cutting is not high. For some endoscope rubbers, it is difficult for their ends to fit the limit blocks described in the utility model, which can easily lead to vacuum breaking, resulting in the loss of expansion attraction and the inability to fully expand the rubber.

[0003] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to provide an expansion tool for an endoscope which can effectively solve the above technical problems.

[0005] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0006] An expansion tool for an endoscope, used for expanding a rubber tube, characterized in that it comprises a shell with a negative pressure chamber, a front end cover movably connected to one end of the shell, a rear end cover arranged at the other end of the shell, an inner steel tube arranged in the negative pressure chamber and used for assembling the rubber tube, a plurality of openings evenly arranged on the inner steel tube, a suction joint arranged on the shell and interconnected with the negative pressure chamber, and a negative pressure pump connected with the suction joint;

[0007] The rubber tube is inserted into the inner steel tube, and the negative pressure pump injects negative pressure into the negative pressure chamber through the suction joint, so that the negative pressure absorbs and expands the rubber tube through the opening, and the negative pressure chamber is vacuumed by closing the opening with the rubber tube.

[0008] Furthermore, one end of the shell close to the front end cover is provided with a first support groove with a front support ring, and one end of the shell close to the rear end cover is provided with a second support groove with a rear support ring;

[0009] The front support ring and the rear support ring have the same shape and structure and are symmetrically arranged with the center line of the negative pressure chamber as the axis, so that the inner steel pipe is placed horizontally in the negative pressure chamber through the front support ring and the rear support ring.

[0010] Furthermore, a support and positioning ring is provided at one end of the front end cover, and a through hole is provided at the central axis of the support and positioning ring.

[0011] Furthermore, a thread groove is formed at one end of the front end cover away from the supporting positioning ring, the thread groove is communicated with the through hole, and the center of the thread groove and the center of the through hole are on the same axis.

[0012] Furthermore, the diameter of the front support ring is equal to the diameter of the support positioning ring, and one end of the front support ring is provided with a chamfered opening arranged on the same center line as the through hole.

[0013] Furthermore, a plurality of negative pressure grooves are evenly distributed on the inner wall of the front support ring in the circumferential direction.

[0014] Furthermore, an end cover screw is inserted into the thread groove, and the end cover screw passes through the thread groove, the through hole and the chamfered opening in sequence, so that the negative pressure chamber forms a closed cavity; wherein the end cover screw is provided with an external thread.

[0015] Furthermore, the front support ring and the rear support ring are both tightly bonded to the inner steel pipe.

[0016] Furthermore, a rubber sealing ring is provided between the front end cover and the outer shell.

[0017] Furthermore, the shell is provided with a pressure relief hole interconnected with the negative pressure chamber, and a pressure relief screw is detachably screwed into the pressure relief hole.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the utility model can effectively enhance the firmness of the end surface of the rubber sleeve through the inner steel pipe and the negative pressure pump, and effectively improve the vacuum degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] Figure 1 This is an application diagram of the utility model.

[0021] Figure 2 It is the first cross-sectional view of the utility model.

[0022] Figure 3 It is the second cross-sectional view of the present utility model.

[0023] Figure 4 It is a three-dimensional diagram of the housing of the utility model.

[0024] Figure 5 It is a cross-sectional view of the shell of the utility model.

[0025] Figure 6 It is a structural schematic diagram of the inner steel pipe of the utility model.

[0026] Figure 7 It is a cross-sectional view of the inner steel pipe of the utility model.

[0027] Figure 8 It is a three-dimensional diagram of the front end cover of the utility model.

[0028] Fig. 9 It is a cross-sectional view of the front end cover of the utility model.

[0029] Fig.10 It is a cross-sectional view of the support ring of the utility model.

[0030] Fig.11 It is a three-dimensional diagram of the support ring of the utility model.

[0031] Fig.12 It is a cross-sectional view of the end cover screw of the utility model.

[0032] Fig.13 It is a three-dimensional diagram of the end cover screw of the utility model.

[0033] Fig.14 It is a schematic diagram of the curling edge of the rubber hose of the utility model.

[0034] In the figure: 1. outer shell, 2. front end cover, 3. rubber tube, 4. rear end cover, 5. inner steel pipe, 6. suction joint, 7. negative pressure pump, 8. end cover screw, 9. pressure relief hole, 10. pressure relief screw, 11. negative pressure chamber, 12. rear support ring, 13. second support groove, 14. front support ring, 15. first support groove, 16. negative pressure groove, 17. chamfered opening, 21. support positioning ring, 22. perforation, 23. threaded groove, 24. rubber sealing ring, 51. opening, 81. external thread. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments.

[0036] In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] like Figures 1 to 14 As shown, an expansion tool for an endoscope is used for expanding a rubber tube, which includes a shell 1 with a negative pressure chamber 11, a front end cover 2 movably connected to one end of the shell 1, a rear end cover 4 arranged at the other end of the shell 1, an inner steel tube 5 arranged in the negative pressure chamber 11 and used for assembling the rubber tube 3, a plurality of openings 51 evenly arranged on the inner steel tube 5, a suction joint 6 arranged on the shell 1 and interconnected with the negative pressure chamber 11, and a negative pressure pump 7 connected to the suction joint 6; wherein, the rubber tube 3 is inserted into the inner steel tube 5, the negative pressure pump 7 injects negative pressure into the negative pressure chamber 11 through the suction joint 6, and the rubber tube 3 is fitted with the opening 51 by the negative pressure, so that the negative pressure chamber 11 is evacuated by the negative pressure to form a vacuum chamber, and then the negative pressure absorbs and expands the rubber tube 3 through the opening 51.

[0038] like Figures 1 to 14As shown, one end of the shell 1 close to the front end cover 2 is provided with a first support groove 15 with a front support ring 14, and one end of the shell 1 close to the rear end cover 4 is provided with a second support groove 13 with a rear support ring 12; wherein, the front support ring 14 and the rear support ring 12 have the same shape and structure and are symmetrically arranged with the center line of the negative pressure chamber 11 as the axis, so that the inner steel pipe 5 is horizontally placed in the negative pressure chamber 11 through the front support ring 14 and the rear support ring 12, and the front support ring 14 and the rear support ring 12 are both tightly adhered to the inner steel pipe 5; in this embodiment, the front support ring 14 and the rear support ring 12 are symmetrically arranged on the plane where the negative pressure chamber 11 is located, The inner steel pipe 5 and the negative pressure chamber 11 are arranged on the same center line, the center line of the suction joint 6 is perpendicular to the center of the negative pressure chamber 11, the first support groove 15 and the second support groove 13 have the same shape and structure, and the first support groove 15 is a circular groove, and the second support groove 13 is also a circular groove, the first support groove 15 and the front support ring 14 are bonded by glue point sealing, and one end of the front support ring 14 is tightly abutted against one end of the negative pressure chamber 11, the second support groove 13 and the rear support ring 12 are bonded by glue point sealing, and one end of the rear support ring 12 is tightly abutted against the other end of the negative pressure chamber 11, and the central axis of the front support ring 14 is provided with a A front circular hole is tightly sleeved on one end of the inner steel tube 5 near the front end cover 2, the front circular hole is arranged on the same center line as the negative pressure chamber 11 and is interconnected, the front circular hole is sealed and adhered to the outer surface of the inner steel tube 5 by glue spotting, and a small part of the end of the inner steel tube 5 near the front end cover 2 extends to the outside of the front support ring 14, and a rear circular hole is provided at the central axis of the rear support ring 12 for tightly sleeved on one end of the inner steel tube 5 near the rear end cover 4, the rear circular hole is arranged on the same center line as the negative pressure chamber 11 and is interconnected, the rear circular hole is sealed and adhered to the outer surface of the inner steel tube 5 by glue spotting, and a small part of the end of the inner steel tube 5 near the rear end cover 4 extends to the rear support ring 1 2 outside; in actual use, the negative pressure pump 7 connects the negative pressure to the negative pressure chamber 11 through the suction joint 6, and the negative pressure enters the interior of the inner steel pipe 5 through the opening 51, and is sealed and adhered in the shell 1 through the front support ring 14 and the rear support ring 12. On the one hand, the position of the inner steel pipe 5 in the negative pressure chamber 11 can be fixed to prevent the inner steel pipe 5 from shifting due to excessive negative pressure during use of this embodiment, thereby avoiding affecting the implementation effect of this embodiment and the fitting effect of the rubber tube 3 and the opening 51, effectively preventing the negative pressure from leaking through the front support ring 14 or the rear support ring 12, and further enhancing the use effect of the embodiment itself.

[0039] like Figures 1 to 14As shown, a rubber sealing ring 24 is provided between the front end cover 2 and the housing 1, and a support and positioning ring 21 is provided at one end of the front end cover 2, and a through hole 22 is provided at the center of the support and positioning ring 21. A thread groove 23 is provided at one end of the front end cover 2 away from the support and positioning ring 21, and the thread groove 23 and the through hole 22 are connected to each other, and the center of the thread groove 23 and the center of the through hole 22 are on the same axis. The diameter of the front support ring 14 is equal to the diameter of the support and positioning ring 21, and one end of the front support ring 14 is provided with a chamfered opening 17 arranged on the same center line as the through hole 22. An end cover screw 8 is inserted into the thread groove 23, and one end of the end cover screw 8 passes through the thread groove 23, the through hole 22 and the chamfered opening 17 in sequence, so that the negative pressure chamber 11 forms a closed cavity; wherein, the end cover screw 8 is provided with an external thread 81; in this embodiment, the end cover screw 8 is inserted through the thread groove 23 and clamped on the front end cover 2 through the external thread 81, and one end of the end cover screw 8 passes through the thread groove 23 and tightly abuts against the through hole 22, and there is a gap between one end of the end cover screw 8 and the inner steel tube 5; in actual use, the rubber tube 3 is inserted into the inner steel tube 5, and the user inserts the end cover screw 8 into the front end cover 2 and makes a small part of one end of the rubber tube 3 between the inner steel tube 5 and the end cover screw 8, so that after the negative pressure enters the negative pressure chamber 11, it can effectively prevent the rubber tube 3 from shifting, thereby avoiding affecting the expansion effect of the rubber tube 3.

[0040] It is worth noting that if Figures 1 to 14 As shown, a plurality of negative pressure grooves 16 are evenly distributed circumferentially on the inner wall of the front support ring 14; in the present embodiment, the front support ring 14 and the rear support ring 12 have the same shape and structure, so a plurality of negative pressure grooves are also evenly distributed circumferentially in the rear support ring 16. In actual use, both the front support ring 14 and the rear support ring 12 will be subjected to pressure from negative pressure. The design of the negative pressure grooves 16 helps to disperse these pressures and reduce pressure concentration, thereby improving the stability and durability of the support rings. In addition, by providing the negative pressure grooves 16, the sealing performance between the front support ring 14 and the outer shell 1, and the sealing performance between the rear support ring 12 and the outer shell 1 can be effectively improved, thereby preventing the negative pressure from leaking from the negative pressure chamber 11 and enhancing the use effect of the embodiment itself.

[0041] like Figures 1 to 14 As shown, the housing 1 is provided with a pressure relief hole 9 which is interconnected with the negative pressure chamber 11, and a pressure relief screw 10 is detachably screwed into the pressure relief hole 9; in this embodiment, the first direction of the pressure relief screw 10 is the screwing direction, and the second direction is the screwing-out direction. In actual use, after the user completes the expansion of the rubber tube 3, the negative pressure in the negative pressure chamber 11 can be discharged to the outside through the pressure relief hole 9 by rotating the pressure relief screw 10 in the second direction. After the discharge is completed, the pressure relief screw 10 can be rotated in the first direction to select the pressure relief screw 10 into the pressure relief hole 9, so that the negative pressure chamber 11 forms a closed cavity, which is convenient for users to use.

[0042] It should be noted that when this embodiment is applied to the snake-bone bending part, after the rubber tube 3 is expanded, the end cover screw 8 is opened, so that the snake-bone bending part is inserted into the negative pressure cavity from the direction of the thread groove 23. When the snake-bone bending part reaches the complete covering distance of the rubber tube 3, the negative pressure pump 7 is closed, and the pressure relief screw 9 is opened, the rubber tube 3 breaks the vacuum, loses the expansion force and wraps around the snake-bone bending part. The snake-bone bending part is pulled out of the tooling, and the sealing ring previously wrapped by the flanged rubber skin is taken out and falls off by itself.

[0043] Working principle: insert the rubber tube 3 into the inner steel tube 5 from the direction of the front end cover 2, and the negative pressure pump 7 injects negative pressure into the negative pressure chamber 11 through the suction joint 6. The rubber tube 3 fits the opening 51 through the negative pressure, so that the negative pressure chamber 11 is evacuated by the negative pressure to form a vacuum chamber, and then the negative pressure absorbs and expands the rubber tube 3 through the opening 51. Then, open the end cover screw 8, so that the snake-bone bend is inserted into the negative pressure chamber from the direction of the thread groove 23. When the snake-bone bend reaches the complete covering distance of the rubber tube 3, turn off the negative pressure pump 7, open the pressure relief screw 9, the rubber tube 3 breaks the vacuum, loses the expansion force and wraps around the snake-bone bend.

[0044] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0045] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An expansion tool for an endoscope, used for expanding a rubber tube (3), characterized in that: The invention comprises a housing (1) having a negative pressure chamber (11), a front end cover (2) movably connected to one end of the housing (1), a rear end cover (4) arranged at the other end of the housing (1), an inner steel pipe (5) arranged in the negative pressure chamber (11) and used for assembling a rubber tube (3), a plurality of openings (51) evenly arranged on the inner steel pipe (5), a suction joint (6) arranged on the housing (1) and communicating with the negative pressure chamber (11), and a negative pressure pump (7) communicating with the suction joint (6); The rubber tube (3) is inserted into the inner steel tube (5), and the negative pressure pump (7) injects negative pressure into the negative pressure chamber (11) through the suction joint (6), so that the negative pressure absorbs and expands the rubber tube (3) through the opening (51), and the negative pressure chamber (11) is evacuated by closing the opening (51) with the rubber tube (3).

2. An expansion tool for an endoscope according to claim 1, characterized in that: A first support groove (15) having a front support ring (14) is provided at one end of the housing (1) close to the front end cover (2), and a second support groove (13) having a rear support ring (12) is provided at one end of the housing (1) close to the rear end cover (4); The front support ring (14) and the rear support ring (12) have the same shape and structure and are symmetrically arranged with the center line of the negative pressure chamber (11) as the axis, so that the inner steel pipe (5) is placed horizontally in the negative pressure chamber (11) through the front support ring (14) and the rear support ring (12).

3. An expansion tool for an endoscope according to claim 2, characterized in that: A support and positioning ring (21) is provided at one end of the front end cover (2), and a through hole (22) is provided at the central axis of the support and positioning ring (21).

4. An expansion tool for an endoscope as claimed in claim 3, characterized in that: A thread groove (23) is formed at one end of the front end cover (2) away from the supporting positioning ring (21); the thread groove (23) and the through hole (22) are connected to each other, and the center of the thread groove (23) and the center of the through hole (22) are on the same axis.

5. An expansion tool for an endoscope as claimed in claim 4, characterized in that: The diameter of the front support ring (14) is equal to the diameter of the support positioning ring (21), and one end of the front support ring (14) is provided with a chamfered opening (17) arranged on the same center line as the through hole (22).

6. An expansion tool for an endoscope according to claim 5, characterized in that: The inner wall of the front support ring (14) is evenly distributed with a plurality of negative pressure grooves (16) in the circumferential direction.

7. An expansion tool for an endoscope according to claim 6, characterized in that: An end cover screw (8) is inserted into the thread groove (23), and the end cover screw (8) passes through the thread groove (23), the through hole (22) and the chamfered opening (17) in sequence, so that the negative pressure chamber (11) forms a closed cavity; wherein the end cover screw (8) is provided with an external thread (81).

8. An expansion tool for an endoscope according to claim 7, characterized in that: The front support ring (14) and the rear support ring (12) are both tightly bonded to the inner steel pipe (5).

9. The expansion tool for endoscope according to claim 1, characterized in that: A rubber sealing ring (24) is provided between the front end cover (2) and the outer shell (1).

10. The expansion tool for endoscope according to claim 1, characterized in that: The housing (1) is provided with a pressure relief hole (9) which is in communication with the negative pressure chamber (11), and a pressure relief screw (10) is detachably screwed into the pressure relief hole (9).

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