Steel wire rope axial adjusting mechanism of endoscope

Abstract

The utility model discloses a steel wire rope axial adjusting mechanism of an endoscope, which comprises a connecting cylinder, a connecting piece, an adjusting spring, a connecting cylinder positioning ring, a rotary bushing, a knob and a steel wire rope traction frame, and the upper end of the connecting cylinder extends into an operating handle of the endoscope and is fixedly connected with the operating handle; the upper part of the connecting piece extends into the connecting cylinder; an accommodating cavity is formed between the connecting cylinder and the upper part of the connecting piece; the adjusting spring is arranged in the accommodating cavity; the upper end of the adjusting spring abuts against an upper cover of the connecting piece, and the lower end of the adjusting spring abuts against a bottom cover of the connecting cylinder. The connecting cylinder positioning ring is in threaded connection with the connecting piece; the bottom cover of the connecting cylinder abuts against the connecting cylinder positioning ring. The rotary bushing is movably arranged outside the connecting cylinder in a sleeving manner; the knob is fixedly connected with the rotary bushing; the steel wire rope traction frame is fixedly connected with the connecting cylinder. According to the utility model, the maintenance time and cost of the steel wire rope with slight plastic deformation can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to an accessory of a medical endoscope, in particular to an axial adjustment mechanism of a steel wire rope of an endoscope. Background Art

[0002] A gastrointestinal endoscope is an endoscopic device with a camera that can be handheld and operated. Its insertion part can enter the human body through natural orifices, such as the upper gastrointestinal tract (including the mouth - esophagus - stomach - duodenum), lower gastrointestinal tract (including the anus - sigmoid colon - descending colon - transverse colon - ascending colon - cecum), etc.

[0003] The insertion tip of the gastrointestinal endoscope is equipped with a light-guiding fiber, which can guide the light from the back-end equipment to the head end for lighting. The image captured by the head end camera is displayed on an external display screen through cables and electrical signal processors, making it convenient for operators to observe and adjust operations in real time.

[0004] The tip of the insertion part is equipped with a snake bone. By pulling the internal wire rope on the hand wheel of the operating handle, the direction of the tip of the insertion part can be adjusted. The flexibility of the direction adjustment of the tip of the insertion part determines the performance of the digestive tract endoscope. The flexibility of the direction adjustment operation of the tip of the insertion part is determined by the snake bone wire rope.

[0005] In addition, there is an endoscope with a hardness adjustment function, which is adjusted by turning the knob at the bottom of the operating handle and pulling the internal hardness adjustment wire rope. The flexibility of the hardness adjustment operation is determined by the hardness adjustment wire rope.

[0006] However, after the endoscope has been used for a period of time, its wire rope will be partially plastically deformed due to the pulling force, causing the wire rope to become longer. Once the wire rope becomes longer, it will affect the operation of the endoscope. At this time, it is necessary to repair the wire rope that is not broken and only slightly deformed.

[0007] Currently, the maintenance process of the endoscope wire rope is relatively complicated, requiring the insertion portion and the operating handle to be disassembled as a whole, the wire rope pulling position to be readjusted, and then the wire ropes to be assembled in the reverse order of disassembly. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide an axial adjustment mechanism for the steel wire rope of an endoscope, which can adjust the length of the steel wire rope of the endoscope by only partially disassembling it, thereby facilitating the maintenance of the steel wire rope of the endoscope.

[0009] In order to solve the above technical problems, the technical solution of the wire rope axial adjustment mechanism of the endoscope of the utility model is:

[0010] It includes a connecting tube 4, a connecting member 2, an adjusting spring 3, a connecting tube positioning ring 5, a rotating bushing 14, a knob 13 and a wire rope traction frame 12. The upper end of the connecting tube 4 extends into the operating handle of the endoscope and is fixedly connected to the operating handle; the upper part of the connecting member 2 extends into the connecting tube 4; a receiving chamber is formed between the connecting tube 4 and the upper part of the connecting member 2; the adjusting spring 3 is arranged in the receiving chamber; the upper end of the adjusting spring 3 abuts against the upper cover of the connecting member 2, and the lower end of the adjusting spring 3 abuts against the bottom cover of the connecting tube 4; the connecting tube positioning ring 5 is connected to the connecting member 2 by threads; the bottom cover of the connecting tube 4 abuts against the connecting tube positioning ring 5; the rotating bushing 14 is movably sleeved on the outside of the connecting tube 4; the knob 13 is fixedly connected to the rotating bushing 14; the wire rope traction frame 12 is fixedly connected to the connecting tube 4; the snake-bone wire rope 1 and the hardness adjustment wire rope 11 of the endoscope pass through the wire rope traction frame 12, and are partially fixed by the wire rope traction frame 12.

[0011] In another embodiment, a friction ring 16 is disposed below the rotating bushing 14 ; the friction ring 16 is sleeved on the connecting tube 4 .

[0012] In another embodiment, the friction ring 16 is a combination of one or more elastic rings; or, the friction ring 16 is a combination of elastic rings with different thicknesses.

[0013] In another embodiment, a cam guide groove 15 is formed on the rotating bushing 14 ; a guide groove screw 141 is fixedly provided on the wire rope traction frame 12 ; and the guide groove screw 141 is inserted into the cam guide groove of the rotating bushing 14 .

[0014] In another embodiment, the cam guide groove 15 extends in the axial direction and the circumferential direction of the rotating bushing 14 .

[0015] In another embodiment, one end of the cam guide groove 15 is located directly above the other end thereof.

[0016] In another embodiment, the wire rope axial adjustment mechanism is disposed between the insertion portion 6 of the endoscope and the operating handle.

[0017] In another embodiment, the lower end of the connecting member 2 is fixedly sleeved on the rear end of the insertion portion 6 of the endoscope.

[0018] In another embodiment, the adjusting spring 3 is a cylindrical helical spring, a wave spring or a special-shaped spring.

[0019] In another embodiment, a tapered sleeve 10 is provided at the rear fixing sleeve of the inserting portion 6 ; the upper end of the tapered sleeve 10 abuts against the knob 13 .

[0020] The technical effects that can be achieved by the utility model are:

[0021] The utility model drives the connecting piece to rotate by twisting the positioning ring of the connecting tube, so that the snake-bone wire rope and the hardness-adjusting wire rope can be moved axially to change the head end position of the snake-bone wire rope and the hardness-adjusting wire rope, thereby restoring the snake-bone wire rope and the hardness-adjusting wire rope to a taut state, thereby achieving the effect of repairing the wire rope.

[0022] The utility model can greatly reduce the maintenance time and cost of the steel wire rope with slight plastic deformation.

[0023] Compared with the existing structure which requires further disassembly of the handle sleeve and the connecting tube and disconnection of the internal pipelines, the utility model is more convenient and effective.

[0024] The utility model has a simple structure and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] It should be understood by those skilled in the art that the following description is only intended to schematically illustrate the principles of the present invention, which can be applied in a variety of ways to achieve many different alternative embodiments. These descriptions are only used to illustrate the general principles of the teachings of the present invention and are not intended to limit the utility model concepts disclosed herein.

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the general description above and the detailed description of the drawings below, are used to explain the principles of the present invention.

[0027] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0028] Figure 1 It is a cross-sectional schematic diagram of the steel wire rope axial adjustment mechanism of the endoscope of the utility model;

[0029] Figure 2 It is a schematic diagram of the utility model in a disassembled state;

[0030] Figure 3 It is a schematic diagram of the rotary bushing of the utility model;

[0031] Figure 4 It is a schematic diagram of the rotary bushing of the utility model from another angle;

[0032] Figure 5 It is a schematic diagram of the principle of adjusting the connecting piece of the utility model; A is a schematic diagram before adjustment, and B is a schematic diagram after adjustment;

[0033] Figure 6 yes Figure 5 A local enlarged schematic diagram of part I in FIG.

[0034] Figure 7It is a schematic diagram of the principle of adjusting the friction ring of the utility model; C is a schematic diagram before adjustment, and D is a schematic diagram after adjustment;

[0035] Figure 8 yes Figure 5 A partial enlarged schematic diagram of Part II in FIG.

[0036] Description of reference numerals in the figures:

[0037] 1 is the snake-bone wire rope, 2 is the connecting piece,

[0038] 3 is the adjustment spring, 4 is the connecting tube,

[0039] 5 is a connection tube positioning ring, 6 is an insertion portion,

[0040] 10 is a conical sleeve,

[0041] 11 is a hardness adjustment wire rope, 12 is a wire rope traction frame,

[0042] 13 is a knob, 14 is a rotary bushing,

[0043] 15 is a cam guide groove, 16 is a friction ring,

[0044] 17 is a friction ring positioning sleeve, 141 is a guide screw. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the utility model belongs. The "first", "second" and similar words used in this article do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0046] like Figure 1 to Figure 2 As shown, the wire rope axial adjustment mechanism of the endoscope of the utility model is used for an endoscope with a hardness adjustment function; the wire rope axial adjustment mechanism is arranged between the insertion portion 6 of the endoscope and the operating handle, and includes a connecting tube 4, the upper end of the connecting tube 4 extends into the lower end of the operating handle and realizes a fixed connection with the operating handle;

[0047] The inner cavity of the connecting tube 4 is provided with a connecting piece 2; the lower end of the connecting tube 4 is sleeved on the connecting piece 2, and the lower end of the connecting piece 2 is fixedly sleeved on the tail end of the inserting portion 6;

[0048] A connecting tube positioning ring 5 is sleeved on the outside of the connecting member 2; the connecting tube positioning ring 5 is connected to the connecting member 2 through a thread; the connecting tube positioning ring 5 is against the bottom cover of the connecting tube 4; the connecting tube positioning ring 5 can realize the relative axial positioning between the connecting tube 4 and the connecting member 2; by screwing the connecting tube positioning ring 5, the relative movement between the connecting tube positioning ring 5 and the connecting member 2 can be realized; the relative axial position of the connecting member 2 and the connecting tube 4 is realized by adjusting the threaded connection portion between the connecting tube positioning ring 5 and the connecting member 2.

[0049] The inner diameter of the connecting tube 4 is larger than the outer diameter of the connecting member 2, and the upper cover of the connecting member 2 and the bottom cover of the connecting tube 4 form an axial distance, so that a receiving cavity is formed between the connecting tube 4 and the connecting member 2;

[0050] The connecting member 2 is sleeved with an adjusting spring 3; the adjusting spring 3 is located in the accommodating cavity; the upper end of the adjusting spring 3 abuts against the upper cover of the connecting member 2, and the lower end of the adjusting spring 3 abuts against the bottom cover of the connecting tube 4;

[0051] The regulating spring 3 may be a cylindrical helical spring, or an equivalent wave spring or other special-shaped spring.

[0052] The hollow inner cavity of the insertion part 6 is penetrated with a plurality of snake-bone steel wires 1 and a hardness adjustment steel wire 11; the snake-bone steel wire 1 is used to adjust the head end direction of the insertion part, and the hardness adjustment steel wire 11 is used to adjust the hardness of the insertion part of the endoscope;

[0053] The outer cover of the connecting tube 4 is provided with a rotating bushing 14, and the outer fixed sleeve of the rotating bushing 14 is provided with a knob 13; the knob 13 is arranged below the operating handle; the rotating bushing 14 is provided with a cam guide groove 15; Figure 3 to Figure 4 As shown, the cam guide groove 15 extends in the axial direction and the circumferential direction of the rotating bushing 14, and one end of the cam guide groove 15 is located directly above the other end thereof;

[0054] A wire rope traction frame 12 is fixedly arranged in the connecting tube 4; the snake-bone wire rope 1 and the hardness-adjusting wire rope 11 pass through the wire rope traction frame 12 and are partially fixed by the wire rope traction frame 12;

[0055] A guide groove screw 141 is fixedly provided on the wire rope traction frame 12; the guide groove screw 141 is inserted into the cam guide groove 15 of the rotating bushing 14;

[0056] By turning the knob 13, the rotating bushing 14 can be driven to rotate at an angle relative to the connecting tube 4; during the rotation of the rotating bushing 14, the relative positions of the cam guide groove 15 of the rotating bushing 14 and the guide groove screw 141 are changed; since the cam guide groove extends along the axial direction and circumferential direction of the rotating bushing 14, the rotating bushing 14 can realize axial movement during the rotation; the direction of the rotating knob 13 can be adjusted to control the up and down movement direction of the rotating bushing 14;

[0057] Furthermore, a friction ring 16 is provided below the rotating bushing 14; the friction ring 16 is sleeved on the front end of the connecting tube 4; a friction ring positioning sleeve 17 is provided below the friction ring 16, and the friction ring positioning sleeve 17 is fixedly sleeved on the connecting tube 4;

[0058] The friction ring 16 can be a combination of one or more elastic rings; or it can be an arrangement and combination of elastic rings of different thicknesses;

[0059] Since the friction ring 16 is against the rotating bushing 14, when the rotating bushing 14 moves up and down, the thickness of the friction ring 16 can be changed; the initial thickness of the friction ring 16 determines the initial position of the rotating bushing 14;

[0060] The initial axial position of the rotating bushing 14 on the connecting tube 4 determines the relative axial position of the rotating bushing 14 and the wire rope traction frame 12. Therefore, the initial axial position of the rotating bushing 14 can determine the head end position of the hardness adjustment wire rope 11; the adjustment of the hardness of the endoscope by the utility model can also be achieved by adjusting the thickness of the friction ring 16, thereby achieving the effect of quickly adjusting the hardness.

[0061] The tail fixing sleeve of the inserting part 6 is provided with a conical sleeve 10; the upper end of the conical sleeve 10 abuts against the knob 13, thereby wrapping the connection tube positioning ring 5 and the lower part of the connection tube 4 therein;

[0062] The rotary bushing 14 is driven to rotate by the knob 13; the knob 13 and the rotary bushing 14 can move up and down along the axial direction of the connecting tube 4 while rotating, thereby changing the axial position of the rotary bushing 14 on the connecting tube 4;

[0063] Since the connecting tube 4 is fixedly connected to the wire rope traction frame 12, the axial movement of the rotating bushing 14 can change the relative axial position of the rotating bushing 14 and the wire rope traction frame 12; therefore, turning the knob 13 can make the wire rope traction frame 12 move axially, and the wire rope traction frame 12 can pull the hardness adjustment wire rope 11, thereby realizing the soft and hard adjustment operation of the endoscope.

[0064] The working principle of the utility model is as follows:

[0065] When the snake-bone steel wire rope 1 and the hardness adjustment steel wire rope 11 are too long, first remove the conical sleeve 10 from the tail of the insertion part 6 to expose the lower part of the connecting tube positioning ring 5 and the connecting tube 4;

[0066] Then, the connection tube positioning ring 5 is twisted to make relative movement between the connection tube positioning ring 5 and the connection member 2; since the connection tube positioning ring 5 abuts against one end of the connection tube 4, the connection tube 4 is fixed, and therefore the connection tube positioning ring 5 is also fixed; therefore, the rotation of the connection tube positioning ring 5 can drive the connection member 2 to move downward relative to the connection tube 4;

[0067] When the connecting member 2 moves downward for a certain distance, the distance between the upper cover of the connecting member 2 and the bottom cover of the connecting tube 4 becomes smaller, so that the length of the adjusting spring 3 becomes smaller, and the adjusting spring 3 stores energy;

[0068] like Figures 5 and 6 As shown, during the downward movement of the connecting member 2, the connecting member 2 drives the snake-bone wire rope 1 and the hardness adjustment wire rope 11 to move downward a distance 111, so that the lengthened snake-bone wire rope 1 and the hardness adjustment wire rope 11 are restored to a taut state, achieving the effect of repairing the wire rope.

[0069] When the serpentine steel wire rope 1 and the hardness adjustment steel wire rope 11 are too short, the knob 13 is turned, and the knob 13 drives the rotating bushing 14 to rotate; while the rotating bushing 14 rotates, it moves axially upward, so that the thickness of the friction ring 16 increases;

[0070] like Figures 7 and 8 As shown, the rotating bushing 14 drives the wire rope traction frame 12 to move upward through the guide groove screw 141 while moving upward, and the wire rope traction frame 12 drives the snake-bone wire rope 1 and the hardness adjustment wire rope 11 to move upward a distance 112, thereby adjusting the relative position of the head end of the hardness adjustment wire rope 11.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A wire rope axial adjustment mechanism for an endoscope, characterized in that: include: A connecting tube, the upper end of which extends into the operating handle of the endoscope and is fixedly connected to the operating handle; A connecting member, the upper portion of which extends into the connecting tube; a receiving cavity is formed between the connecting tube and the upper portion of the connecting member; An adjusting spring is arranged in the accommodating cavity; the upper end of the adjusting spring abuts against the upper cover of the connecting member, and the lower end of the adjusting spring abuts against the bottom cover of the connecting tube; A connecting tube positioning ring is connected to the connecting piece through threads; the bottom cover of the connecting tube abuts against the connecting tube positioning ring; A rotating bushing, which is movably mounted on the outside of the connecting tube; A knob fixedly connected to the rotating bushing; and A wire rope traction frame is fixedly connected to the connecting tube.

2. The wire rope axial adjustment mechanism of the endoscope according to claim 1, characterized in that: A friction ring is arranged below the rotating bushing; the friction ring is sleeved on the connecting tube.

3. The wire rope axial adjustment mechanism of the endoscope according to claim 2, characterized in that: The friction ring is a combination of one or more elastic rings; or, the friction ring is a combination of elastic rings with different thicknesses.

4. The wire rope axial adjustment mechanism of the endoscope according to claim 1, characterized in that: A cam guide groove is provided on the rotary bushing; a guide groove screw is fixedly provided on the wire rope traction frame; and the guide groove screw is inserted into the cam guide groove of the rotary bushing.

5. The wire rope axial adjustment mechanism of the endoscope according to claim 4, characterized in that: The cam guide groove extends in the axial direction and the circumferential direction of the rotary bushing.

6. The wire rope axial adjustment mechanism for an endoscope according to claim 5, characterized in that: One end of the cam guide groove is located directly above the other end thereof.

7. The wire rope axial adjustment mechanism of the endoscope according to claim 1, characterized in that: The wire rope axial adjustment mechanism is arranged between the insertion portion and the operating handle of the endoscope.

8. The wire rope axial adjustment mechanism for an endoscope according to claim 1 or 7, characterized in that: The lower end of the connecting piece is fixedly sleeved on the rear end of the insertion part of the endoscope.

9. The wire rope axial adjustment mechanism of the endoscope according to claim 1, characterized in that: The regulating spring is a cylindrical helical spring, a wave spring or a special-shaped spring.

10. The wire rope axial adjustment mechanism for an endoscope according to claim 8, characterized in that: The tail fixing sleeve of the inserting part is provided with a conical sleeve; the upper end of the conical sleeve abuts against the knob.

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