Snake bone and endoscope

Abstract

The invention relates to the technical field of medical instruments, and discloses a snake bone and an endoscope, and the snake bone comprises a main body, a sleeve, at least two pull wires and an elastic sheet. The main body is formed by one-time injection molding of a flexible material, a working channel and a wire harness channel are arranged in the main body, the directions of the working channel and the wire harness channel are parallel to the axial direction of the main body, and the elastic sheet is arranged between the working channel and the wire harness channel. At least two deformation groove sets are formed in the circumferential face of the body, and the multiple deformation grooves in each deformation groove set are distributed in the axial direction of the body. The two pull wires are arranged in the main body in a penetrating mode in the axial direction of the main body, the two pull wires penetrate through the two deformation groove sets respectively, and the sleeve is arranged on the circumferential face of the main body in a sleeving mode. According to the snake bone, the wire harness of the camera module does not extrude the working channel in the bending process, and the strength of the working channel is improved through the elastic sheet. And the passing ability of a working channel is prevented from being influenced by bending. A hose does not need to be additionally arranged in the snake bone, and the utilization rate of the space in the snake bone is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a snake bone and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device that uses a flexible and controllable snake-bone structure to enter the body through the mouth or other natural orifices of the human body, thereby detecting conditions in the body, or performing operations such as spraying drugs, removing tissues, or removing foreign bodies. In order to achieve the above functions, a hose 600 is usually set in the snake-bone to guide surgical tools, liquids, or gases through the snake-bone, and a control and signal harness 510 needs to pass through the camera module 500. In existing endoscopes, such as Figure 1 As shown, the snake bone mostly adopts an O-shaped structure. The hose 600 is usually located in the O-shaped channel of the snake bone together with the wiring harness 510 of the camera module 500. When the snake bone is bent under the control of the traction line 300, the hose 600 may be deformed, which may affect the insertion and removal of the tool or the circulation of gas and liquid. The hose 600 and the wiring harness 510 share space, and the deformation of the wiring harness 510 when bending may also cause a squeeze on the hose 600, thereby affecting the passability of the hose 600. In addition, the arrangement of the hose 600 in the O-shaped channel also wastes the internal space of the snake bone, resulting in limited space for the hose 600, which affects the smooth insertion and removal of the tool. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a snake bone that can improve the utilization rate of the internal space of the snake bone, avoid the bending of the snake bone affecting the permeability of surgical tools, gas or liquid, and enhance the flexibility of endoscope use.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a snake bone, including a main body, a sleeve, at least two traction lines and an elastic sheet, the main body is injection molded by a flexible material in one step, a working channel and a wiring harness channel are arranged in the main body, the directions of the working channel and the wiring harness channel are parallel to the axial direction of the main body, the elastic sheet is arranged between the working channel and the wiring harness channel, at least two groups of deformation groove groups are arranged on the circumferential surface of the main body, the multiple deformation grooves in each group of deformation groove groups are distributed along the axial direction of the main body, the two traction lines are arranged in the main body along the axial direction of the main body, the two traction lines pass through the two groups of deformation groove groups respectively, and the sleeve is sleeved on the circumferential surface of the main body.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows: By separating the wire harness channel and the working channel into two independent channels and arranging an elastic sheet between the working channel and the wire harness channel, it is possible to prevent the wire harness in the wire harness channel from affecting the passing performance of the working channel when the snake bone bends. Moreover, the strength of the working channel is enhanced by the elastic sheet, preventing the working channel from being squeezed and deformed by the wire harness during the bending process of the snake bone, resulting in a decrease in passing performance. At the same time, due to the separation of the wire harness channel and the working channel, there is no need to insert a hose into the working channel to form a channel that is not affected by the wire harness of the camera module. Gas, liquid, and tools can directly flow or be inserted and removed in the working channel, thereby increasing the diameter of the working channel, improving the utilization rate of the internal space of the snake bone, and enhancing the passing performance of the working channel.

[0006] For the above snake bone, the wire harness channel is a U-shaped groove with openings at both ends.

[0007] For the above snake bone, the working channel is a U-shaped groove with openings at both ends. The sleeve is in interference fit with the main body, so that the inner wall of the sleeve is closely attached to the edge of the lateral notch of the working channel.

[0008] For the above snake bone, the first deformation groove group is arranged on one side of the main body close to the wire harness channel, and the second deformation groove group is arranged on one side of the main body close to the working channel. The first deformation groove group includes a plurality of first deformation grooves, and the plurality of first deformation grooves divide the wire harness channel into multiple segments. The second deformation groove group includes a row of second deformation grooves and a row of third deformation grooves. The second deformation grooves and the third deformation grooves are respectively arranged on both sides of the working channel. The positions of the plurality of first deformation grooves, the second deformation grooves, and the third deformation grooves in the axial direction of the main body correspond to each other one by one.

[0009] For the above snake bone, traction channels for passing the traction wire are arranged on the groove walls between adjacent first deformation grooves, and between adjacent second deformation grooves and / or adjacent third deformation grooves. A pair of break-through grooves with different opening directions are arranged on the groove wall, and both break-through grooves communicate with the traction channel.

[0010] For the above snake bone, the sum of the lengths of the two break-through grooves on the same groove wall in the axial direction of the main body is equal to the length of the traction channel on the same groove wall.

[0011] For the above snake bone, a plurality of deformation holes are arranged on the elastic sheet along the axial direction of the main body, and the positions of the plurality of deformation holes correspond to the positions of the plurality of first deformation grooves in the axial direction of the main body one by one.

[0012] The above-mentioned snake bone, the first deformation groove and the wire harness channel are both symmetric structures, the symmetry planes of the first deformation groove and the wire harness channel in the axial direction of the main body are in the same plane, and the axis of the traction channel on the groove wall between adjacent first deformation grooves is coplanar with the symmetry plane of the first deformation groove.

[0013] For the above-mentioned snake bone, when the traction channel is provided only on the groove wall between adjacent second deformation grooves or adjacent third deformation grooves, the position of the axis of the working channel is biased in the direction away from the traction channel.

[0014] An endoscope includes the above-mentioned snake bone.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0016] Figure 1 Is the bottom view of the snake bone of the prior art;

[0017] Figure 2 Is the bottom view of the snake bone of the embodiment of the present invention;

[0018] Figure 3 Is the cross-sectional view of the main body of the snake bone of the embodiment of the present invention;

[0019] Figure 4 Is the three-dimensional structure schematic diagram of the main body of the snake bone of the embodiment of the present invention;

[0020] Figure 5 Is the front view of the main body of the snake bone of the embodiment of the present invention;

[0021] Figure 6 Is Figure 5 The enlarged schematic diagram at A in

[0022] Figure 7 Is the back view of the main body of the snake bone of the embodiment of the present invention;

[0023] Figure 8 Is Figure 7 The enlarged schematic diagram at B in

[0024] Figure 9 Is the cross-sectional view of the groove wall of the first deformation groove of the embodiment of the present invention;

[0025] Figure 10 Is Figure 9 The enlarged schematic diagram at C in

[0026] Figure 11 Is the cross-sectional view of the groove wall of the second deformation groove of the embodiment of the present invention;

[0027] Figure 12 IsFigure 11 Enlarged schematic view at D in the figure;

[0028] Figure 13 Schematic structural view of the elastic sheet according to an embodiment of the present invention.

[0029] Explanation of the reference numerals in the drawings:

[0030] 100 Main body, 110 Wiring harness channel, 120 Working channel, 130 First deformation groove, 140 Second deformation groove, 150 Third deformation groove, 200 Sleeve, 300 Traction wire, 310 Penetration groove, 400 Elastic sheet, 410 Deformation hole, 500 Camera module, 510 Wiring harness, 600 Hose. Specific implementation manner

[0031] The embodiments of the present invention will be described in detail below. Referring to Figures 2 to 4 , the embodiments of the present invention provide a snake bone for instruments such as endoscopes that need to be inserted into natural orifices for surgery or operation. The snake bone includes a main body 100, a sleeve 200, at least two traction wires 300, and an elastic sheet 400. The main body 100 is integrally injection-molded from a flexible material and can be bent and deformed. A working channel 120 and a wiring harness channel 110 are provided in the main body 100. The directions of the working channel 120 and the wiring harness channel 110 are both parallel to the axial direction of the main body 100. The elastic sheet 400 is disposed between the working channel 120 and the wiring harness channel 110. At least two groups of deformation groove groups are provided on the circumferential surface of the main body 100. Each group of deformation groove groups includes a plurality of deformation grooves distributed along the axial direction of the main body 100. Two traction wires 300 are strung in the main body 100 along the axial direction of the main body 100, and the two traction wires 300 respectively pass through the two groups of deformation groove groups. The sleeve 200 is sleeved on the circumferential surface of the main body 100.

[0032] The snake bone separates the wire harness channel 110 and the working channel 120 into two independent channels. During the bending process of the snake bone, the wire harness 510 of the bent camera module 500 will not squeeze the working channel 120, thus avoiding the influence of the wire harness 510 of the camera module 500 on the passability of the working channel 120. And because the working channel 120 and the wire harness channel 110 are separated, there is no need to set a hose 600 in the working channel 120, and a pipeline that is not affected by the wire harness 510 can be formed, thus avoiding the wall of the hose 600 occupying the space inside the snake bone, making the effective diameter of the working channel 120 larger, improving the utilization rate of the internal space of the snake bone, and also improving the passability of the working channel 120, making the extraction of surgical tools such as the stone extraction net basket smoother, and making the surgical process easier. The elastic sheet 400 disposed between the working channel 120 and the wire harness channel 110 can also enhance the strength of the working channel 120, further avoiding the deformation of the working channel 120 caused by the extrusion of the wire harness 510 when the snake bone bends, which affects the passability of the working channel 120. In this snake bone, since the wire harness 510 of the camera module 500 is fixed in the wire harness channel 110, it can avoid the random movement of the wire harness 510 during the bending process of the snake bone, resulting in the torsion of the wire harness 510 after long-term use and causing damage to the wire harness 510.

[0033] Referring to Figure 4 , Figure 5 and Figure 7 , in some embodiments, for the convenience of installing the wire harness 510, the wire harness channel 110 is a U-shaped groove with openings at both ends. The wire harness 510 can be embedded into the wire harness channel 110 through the notch on the circumferential surface of the main body 100 that communicates with the wire harness channel 110, thereby improving the installation efficiency of the camera module 500 and the manufacturing efficiency of the endoscope. And in order to further increase the effective passing area of the working channel 120, in some embodiments, the working channel 120 is also a U-shaped groove with openings at both ends, and the sleeve 200 needs to be in interference fit with the main body 100, so that the inner wall of the sleeve 200 is closely attached to the edge of the notch on the side of the working channel 120, and the sleeve 200 seals the gas and liquid at the notch on the side of the working channel 120. The working channel 120 uses a part of the pipe wall of the sleeve 200 as the pipe wall of the channel, so that the diameter of the working channel 120 can be larger, the effective passing area can be larger, and the utilization of the internal space of the snake bone can be more effectively improved. The pipe wall of the sleeve 200 that is in interference fit with the main body 100 can also tightly press the wire harness 510 of the camera module 500 in the wire harness channel 110, thereby improving the installation stability of the camera module 500.

[0034] Referring to Figures 4 to 7, in some embodiments, to make full use of the internal space of the snake bone and ensure the bending performance of the snake bone in a pair of opposite directions, the working channel 120 and the wire harness channel 110 are respectively arranged on opposite sides of the main body 100. The first deformation groove group 130 and the second deformation groove group 140 are arranged on the main body 100. The first deformation groove group 130 is arranged on one side of the wire harness channel 110, and the second deformation groove group 140 is arranged on one side of the working channel 120. In this embodiment, the first deformation groove 130 only includes a column of first deformation grooves 130, and a plurality of first deformation grooves 130 communicate with the wire harness channel 110, dividing the wire harness channel 110 into multiple segments, so as to ensure the bending flexibility of the snake bone while improving the utilization rate of the space of the snake bone. Since the working channel 120 may be used for the flow of gas and liquid in actual use, it needs to have airtightness and liquid tightness and cannot be penetrated by the deformation groove. Therefore, in this embodiment, the second deformation groove group 140 includes a column of second deformation grooves 140 and a column of third deformation grooves 150, and the second deformation grooves 140 and the third deformation grooves 150 are respectively arranged on both sides of the working channel 120. The positions of the plurality of first deformation grooves 130, second deformation grooves 140 and third deformation grooves 150 correspond to each other axially, so as to ensure that the bending flexibility of the snake bone in two directions can be kept consistent, and also avoid wasting the internal space of the snake bone due to misalignment setting and reducing the strength of the snake bone.

[0035] Refer to Figure 6 , Figure 8 and Figures 9 to 12, in order to reduce the forming difficulty of the traction channel for threading the traction wire 300, make the diameter of the traction channel thinner, and further improve the space utilization rate of the thinner snake bone, the traction channel is injection-molded by the punching-through process. A pair of punching-through grooves 310 are provided on the groove walls between adjacent first deformation grooves 130, and on the groove walls between adjacent second deformation grooves 140 and / or third deformation grooves 150. The opening directions of the notches of the two punching-through grooves 310 on the circumferential surface of the main body 100 are different, and both punching-through grooves 310 communicate with the traction channel. And the sum of the lengths of the two punching-through grooves 310 on the same groove wall in the axial direction of the main body 100 is equal to the length of the traction channel section on the same groove wall, that is, the traction channel at the groove wall is composed of two semi-open punching-through grooves 310 with different opening directions. Since the lateral opening directions of the punching-through grooves 310 are different, the traction wire 300 cannot protrude out of the traction channel in the lateral direction of the main body 100. For this snake bone, when injection-molding, only the punching-through bosses for forming the punching-through grooves 310 need to be provided on the inner wall of the molding cavity of the mold, so that at least two traction channels through which the traction wire 300 can pass can be formed in the snake bone without burying metal rods. And since the traction channel can be formed without burying metal rods, it can be avoided that when forming a thinner traction channel, the buried metal rod is too thin and lacks strength and cannot be completely taken out after molding, resulting in product scrapping. Thus, a thinner traction channel can be formed, reducing the space occupancy rate of the traction wire 300 in the thinner endoscope snake bone, and thus more space can be vacated for the working channel 120.

[0036] It can be understood that in some thicker endoscope snake bones, the control of the snake bone is more difficult, and there is enough space in the snake bone to accommodate multiple traction wires 300, the working channel 120, and the wire harness channel 110 at the same time. Therefore, a traction wire 300 can be respectively threaded through the second deformation groove 140 and the third deformation groove 150, and the first deformation groove 130 and the third deformation groove 150 are symmetrically arranged on both sides of the working channel 120. In some snake bones with limited internal space, referring to Figure 8 and Figure 12 , the traction wire 300 on the side of the working channel 120 is only arranged on one side of the working channel 120. In this embodiment, only the traction wire 300 is threaded through the second deformation groove 140, and the axis of the working channel 120 deviates in the direction away from the traction wire 300 and the traction channel, that is, in the direction of the third deformation groove 150 where the traction wire 300 is not arranged, so that there can be more space available at the second deformation groove 140. After threading the traction wire 300, the remaining part still has sufficient strength to maintain the passability of the working channel 120 during the bending process of the snake bone.

[0037] Referring to Figure 6, in order to improve the stability of the control of the bending of the snake bone, in this embodiment, both the first deformation groove 130 and the wire harness channel 110 are symmetric structures, and the symmetry planes of the first deformation groove 130 and the wire harness channel 110 in the axial direction of the main body 100 are in the same plane. The axes of the traction channels on the groove walls between adjacent first deformation grooves 130 are also coplanar with the symmetry plane of the first deformation groove 130, that is, the traction wire 300 is located in the middle of the working channel 120 and the first deformation groove 130. By arranging the traction wire 300 in the middle of the deformation groove, when pulling the end of the snake bone through the traction wire 300 to control the bending of the snake bone, the force on the snake bone can be made as uniform as possible, thereby improving the stability of the control of the snake bone.

[0038] It can be understood that the main body 100 of the snake bone is usually approximately cylindrical, and the shapes of the working channel 120 and the wire harness channel 110 should be set according to the shapes of the tools passing through and the wire harness 510. In this embodiment, the working channel 120 is a cylindrical channel to adapt to as many types of tools as possible, and the wire harness channel 110 is a cuboid shape to realize the fixation of the wire harness 510 of the flat camera module 500. The elastic sheet 400 should preferably be made of a metal material or a plastic material with a certain strength and strong deformation ability. Correspondingly, the shape of the elastic sheet 400 should be adapted to the shape of the working channel 120. In this embodiment, the cross-section of the elastic sheet 400 is arc-shaped. Refer to Figure 13 , in this embodiment, in order to improve the strength of the snake bone and the working channel 120 while ensuring the flexibility of the bending of the snake bone, a plurality of deformation holes 410 are provided on the elastic sheet 400. The plurality of deformation holes 410 are arranged along the axial direction of the main body 100, and the positions of the plurality of deformation holes 410 in the axial direction of the main body 100 correspond to the first deformation grooves 130 one by one, so as to avoid the strength of the elastic sheet 400 affecting the bending flexibility of the snake bone.

[0039] It can be understood that a receiving cavity for receiving the camera module 500 should be provided at the end of the snake bone, and a connecting portion for connecting with the handle of the endoscope should be provided at the head end of the snake bone, such as a transition tube for guiding gas, liquid and tools into the working channel 120 inside the snake bone, and a traction tube for guiding the traction wire 300, etc. The main body 100 of the snake bone can be injection-molded from a soft material such as TPE, TPU or medical-grade silica gel. The sleeve 200 can be a medical-grade heat-shrinkable rubber tube. After the sleeve 200 is sleeved on the main body 100, the sleeve 200 can be heated to cause a certain degree of heat shrinkage of the sleeve 200, so that the sleeve 200 can wrap more tightly around the main body 100.

[0040] The endoscope according to the embodiment of the present invention includes the above-mentioned snake bone, which can avoid the blockage of the working channel 120 during the bending of the snake bone, so that the flow of liquid medicine, gas or surgical tools is easier, thereby improving the surgical efficiency.

[0041] It should be noted that in the description of the present invention, if there is any reference to the description of directions, such as the directions or positional relationships indicated by up, down, front, back, left, right, etc., they are all based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed or operated in a specific direction, and should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of "first" or "second", etc., it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0044] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A snake bone, characterized in that, It includes a main body (100), a sleeve (200), at least two traction wires (300) and an elastic sheet (400). The main body (100) is integrally injection-molded from a flexible material. A working channel (120) and a wire harness channel (110) are arranged inside the main body (100). The directions of the working channel (120) and the wire harness channel (110) are parallel to the axial direction of the main body (100). The elastic sheet (400) is arranged between the working channel (120) and the wire harness channel (110). At least two groups of deformation groove groups are arranged on the circumferential surface of the main body (100). A plurality of deformation grooves in each group of deformation groove groups are distributed along the axial direction of the main body (100). The two traction wires (300) are axially inserted into the main body (100). The two traction wires (300) respectively pass through two groups of deformation groove groups. The sleeve (200) is sleeved on the circumferential surface of the main body (100).

2. The snake bone according to claim 1, characterized in that, The wire harness channel (110) is a U-shaped groove with both ends open.

3. The snake bone according to claim 1, wherein The working channel (120) is a U-shaped groove with both ends open. The sleeve (200) is in interference fit with the main body (100), so that the inner wall of the sleeve (200) is closely attached to the edge of the lateral notch of the working channel (120).

4. The snake bone according to claim 1, characterized in that, A first deformation groove (130) group is arranged on one side of the main body (100) close to the wire harness channel (110). A second deformation groove (140) group is arranged on one side of the main body (100) close to the working channel (120). The first deformation groove (130) group includes a plurality of first deformation grooves (130). The plurality of first deformation grooves (130) divide the wire harness channel (110) into multiple segments. The second deformation groove (140) group includes a row of second deformation grooves (140) and a row of third deformation grooves (150). The second deformation grooves (140) and the third deformation grooves (150) are respectively arranged on both sides of the working channel (120). The positions of the plurality of first deformation grooves (130), the second deformation grooves (140) and the third deformation grooves (150) in the axial direction of the main body (100) correspond to each other one by one.

5. The snake bone according to claim 4, wherein On the groove walls between adjacent first deformation grooves (130), and on the groove walls between adjacent second deformation grooves (140) and / or adjacent third deformation grooves (150), traction channels for passing the traction wires (300) are arranged. A pair of break-through grooves (310) with different opening directions are arranged on the groove walls. The two break-through grooves (310) are both communicated with the traction channels.

6. The snake bone according to claim 5, characterized in that, The sum of the lengths of the two break-through grooves (310) on the same groove wall in the axial direction of the main body (100) is equal to the length of the traction channel on the same groove wall.

7. The snake bone according to claim 4, characterized in that, The elastic sheet (400) is provided with a plurality of deformation holes (410) in the axial direction along the main body (100). The positions of the plurality of deformation holes (410) correspond to the positions of the plurality of first deformation grooves (130) in the axial direction of the main body (100) one by one.

8. The snake bone according to claim 4, wherein Both the first deformation groove (130) and the wire harness channel (110) are symmetric structures. The symmetry planes of the first deformation groove (130) and the wire harness channel (110) in the axial direction of the main body (100) are in the same plane. The axis of the traction channel on the groove wall between adjacent first deformation grooves (130) is coplanar with the symmetry plane of the first deformation groove (130).

9. The snake bone according to claim 4, wherein When the traction channel is provided only on the groove wall between adjacent second deformation grooves (140) or adjacent third deformation grooves (150), the position of the axis of the working channel (120) is biased in the direction away from the traction channel.

10. An endoscope, characterized in that, Comprising a snake bone according to any one of claims 1 to 9.

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