Snake bone component and endoscope

Abstract

The present application relates to a snake bone assembly and an endoscope, and relates to the field of endoscope assemblies, which includes a plurality of snake bones and a connecting assembly located between two adjacent snake bones, wherein the connecting assembly includes a first tongue piece, a second tongue piece, a pin and a support member, wherein the first tongue piece and the second tongue piece are respectively integrally formed at the two ends of the snake bone, the edge of the opening of the first perforation is coaxially provided with a first annular chamfer, and the edge of the opening of the second perforation is coaxially provided with a second annular chamfer; the pin shaft passes through the first perforation and the second perforation together, and the diameter of the pin shaft is smaller than the diameter of the first perforation and the second perforation, and the pin shaft has a tapered surface; the support member is installed and matched with the pin shaft; the support member forces the pin shaft to move radially in a direction away from the axis of the snake bone, so that the tapered surface of the pin shaft is jointly fitted with the second chamfer and the first chamfer. The present application can improve the bending accuracy of the snake bone.

Description

Technical Field

[0001] The present application relates to the field of endoscope components, and more particularly to a snake bone component and an endoscope. Background Art

[0002] An endoscope is a detection instrument that has an image sensor, optical lens, light source, instrument channel, water and vapor control, etc. It can enter the natural passages such as the stomach, trachea, and intestines through the mouth, nose, and anus. The lesions in the passages can be visually seen using an endoscope, and biopsy, resection, and other operations can also be performed using special instruments.

[0003] The snake bone is applied to the curved part of the endoscope head end, and the bending of the endoscope head end can be controlled by the traction wire rope arranged in the snake bone.

[0004] The existing riveted snake bone assembly includes multiple snake bones, and the first tongue piece and the second tongue piece are integrally formed at both ends of the snake bone. The first tongue piece and the second tongue piece are overlapped, and the first tongue piece and the second tongue piece are both provided with through holes, and the through holes of the first tongue piece and the second tongue piece are jointly penetrated by a pin shaft, thereby realizing the rotational cooperation of two adjacent snake bones.

[0005] The riveted serpentine bones need to be designed with virtual positions due to the requirements of installation and use, that is, the diameter of the perforation needs to be larger than the diameter of the pin. However, this will cause the pin to have obvious clearance after riveting, that is, there is a large gap between the pin and the wall of the perforated hole. Therefore, during the bending process of the riveted serpentine bones (relative rotation between adjacent serpentine bones), the pin will change position in the gap, that is, the rotation axis of adjacent serpentine bones constantly changes position, resulting in poor bending accuracy of the serpentine bones. Summary of the invention

[0006] In order to improve the bending accuracy of the snake bone, the present application provides a snake bone assembly and an endoscope.

[0007] The present application provides a snake bone component, which adopts the following technical solution:

[0008] A snake bone assembly comprises a plurality of snake bones and a connecting assembly located between two adjacent snake bones, wherein the connecting assembly comprises a first tongue piece, a second tongue piece, a pin and a support member, wherein the first tongue piece and the second tongue piece are respectively integrally formed at two ends of the snake bones, the first tongue piece is arranged away from the axis of the snake bones relative to the second tongue piece, and there is a gap along the radial direction of the snake bones between the first tongue piece and the second tongue piece of the two adjacent snake bones, the first tongue piece has a first through hole, the edge of the opening of the first through hole is coaxially provided with a first annular chamfer, the second tongue piece has a second through hole, the edge of the opening of the second through hole is coaxially provided with a second annular chamfer; the pin shaft passes through the first through hole and the second through hole together, and the diameter of the pin shaft is smaller than the diameter of the first through hole and the second through hole, and the pin shaft has a tapered surface; the support member is installed and matched with the pin shaft; the support member forces the pin shaft to move radially in a direction away from the axis of the snake bones, so that the tapered surface of the pin shaft fits the second chamfer and the first chamfer together.

[0009] By adopting the above technical solution, during installation, the pin is first passed through the first through hole and the second through hole. Since the diameter of the pin is smaller than the diameter of the first through hole and the second through hole, the pin can be passed through more easily. Then, the support member will force the pin to move radially away from the axis of the serpentine bone, so that the conical surface of the pin fits together with the second chamfer and the first chamfer. Through this fitting, the position of the first tongue piece and the second tongue piece is corrected, so that the first through hole, the second through hole and the pin are coaxially arranged, that is, the rotation axis of the adjacent serpentine bones is in a fixed position, thereby improving the bending accuracy of the serpentine bone.

[0010] Furthermore, by setting a radial gap between the first tongue piece and the second tongue piece of two adjacent snake bones, and the first tongue piece and the second tongue piece are in the form of thin sheets, which have a certain radial elastic displacement capability, therefore, when the support drives the pin shaft to move, the first tongue piece and the second tongue piece with a large position processing error will be corrected through the cooperation between the conical surface of the pin shaft and the second chamfer and the first chamfer, so as to ensure that the first perforation, the second perforation and the pin shaft are coaxially arranged, thereby reducing the occurrence of poor coaxiality due to processing errors.

[0011] Optionally, the support member includes a sleeve sleeved on the pin shaft, one end of the sleeve is integrally formed with a plurality of cards extending radially thereof, and the other end of the sleeve is integrally formed with a plurality of elastic claws, which are arranged at an angle; an annular card groove is provided at the end of the pin shaft, the card is inserted into the card groove, and the end of the elastic claw elastically abuts against the surface of the first tongue piece away from the second tongue piece.

[0012] By adopting the above technical solution, after the pin is inserted, the pin is first moved so that the conical surface of the pin fits together with the second chamfer and the first chamfer, and then the sleeve is sleeved on the pin. At this time, the card is inserted into the card slot, so that the sleeve and the pin are axially limited, and the end of the elastic claw elastically abuts against the surface of the first tongue piece away from the second tongue piece, that is, the elastic force of the elastic claw will further force the conical surface of the pin to fit together with the second chamfer and the first chamfer, that is, during the rotation of the snake bone, the elastic force of the elastic claw will resist the axial tension of the snake bone, thereby reducing the excessive axial tension of the snake bone, which causes the pin to move axially relative to the snake bone, thereby reducing the occurrence of gaps between the conical surface and the first chamfer and the second chamfer, thereby ensuring the bending accuracy of the snake bone.

[0013] Optionally, the support member is configured as a C-shaped member, the C-shaped member includes an arc-shaped connecting portion, connecting plates are integrally formed on both sides of the connecting portion, the two connecting plates are respectively located on both sides of the pin shaft, and the two sides of the connecting plate are respectively configured as a guiding side and an abutting side, wherein the guiding side is provided with a wedge strip, and the end of the pin shaft is provided with an annular groove, and the groove wall of the annular groove has a guide surface; when the two connecting plates approach the pin shaft, the inclined surface of the wedge strip cooperates with the guide surface, and the connecting plate moves radially toward the axis center of the pin shaft until the abutting side of the connecting plate presses against the surface of the first tongue piece and drives the pin shaft to move radially away from the axis center of the snake bone.

[0014] By adopting the above technical solution, after the pin is inserted, the pin is first moved so that the conical surface of the pin fits together with the second chamfer and the first chamfer, and the C-shaped part is placed on the surface of the first tongue. At this time, the end of the pin is located in the enclosed area of ​​the C-shaped part, that is, the two connecting plates are respectively located on both sides of the pin, and then the connecting plate is pressed to make the connecting plate move along the radial plastic deformation toward the axis of the snake bone. At this time, the force of the connecting plate converts the cooperation between the inclined surface of the wedge strip and the guide surface into a force that forces the pin to move radially away from the axis of the snake bone, which will further force the conical surface of the pin to fit together with the second chamfer and the first chamfer. After the plastic deformation of the connecting plate is completed, the position of the connecting plate remains unchanged, and the connecting plate limits the pin axially. The limiting effect can resist the axial tension of the snake bone, thereby reducing the axial tension of the snake bone that is too large, causing the pin to move axially relative to the snake bone, thereby reducing the occurrence of gaps between the conical surface and the first chamfer and the second chamfer, thereby ensuring the bending accuracy of the snake bone.

[0015] Optionally, the pin shaft is a tubular structure, which extends radially along the serpentine and passes through two first tongues at the same end of the serpentine, and the pin shaft includes a tube body section, a deformation section and an end section from the middle to both ends, wherein the tube body section includes two separately arranged sliding tubes, the two sliding tubes are axially slidingly matched, and the two sliding tubes are respectively integrally connected to adjacent deformation sections, and the support member is configured as a spring, and the spring is used to force the two sliding tubes to slide away from each other; the deformation section has a plurality of deformation strips evenly arranged around the circumference, and the two ends of the deformation strip are respectively provided with a first easy-deformation groove at the connection between the end section and the sliding tube, and a second easy-deformation groove is provided in the middle of the deformation strip; when both ends of the pin shaft are subjected to axial pressure, the deformation strip is plastically deflected and deformed in a direction away from the axis of the pin shaft, so that the deformation strip has a first deformation portion and a second deformation portion, wherein the surface composition of each first deformation portion forms the conical surface.

[0016] By adopting the above technical scheme, during installation, the pin is passed through the two first tongues at the same end of the snake bone along the radial direction of the snake bone, and then pressure along the axial direction of the pin is applied to both ends of the pin shaft, so that the spring is compressed and the two deformation sections are close to each other (that is, the deformation sections are located in the inner cavity of the snake tube), and then pressure along the axial direction of the pin shaft is continued to be applied to both ends of the pin shaft. Since the spring cannot be further compressed, the axial pressure is applied to the deformation section, thereby forcing the deformation strip to perform plastic deflection deformation in the direction away from the axis of the pin shaft, so that the deformation strip has a first deformation part and a second deformation part, and then the pin shaft is released, the spring releases elastic potential energy, and the two sliding tubes move away from each other, so as to force the two first deformation parts to move away from each other, and the two first deformation parts cooperate with the first chamfer and the second chamfer on both sides respectively, so that the pin shaft, the first through hole and the second through hole are coaxially arranged, thereby ensuring the bending accuracy of the snake bone.

[0017] Moreover, by setting the tube section, the deformation section and the end section, not only is it convenient to thread and install the pin, but the plastic deformation of the deformation section is used to form a conical surface, and then the elastic force of the spring is used to realize the coaxial arrangement of the pin, the first perforation and the second perforation, that is, one pin completes the installation of two riveting points, which is faster and more convenient, and the coaxiality of the first tongue piece and the second tongue piece at the same end of the snake bone is relatively high. Secondly, it can also effectively reduce the occupation of the external space of the snake bone by the end of the pin.

[0018] Optionally, the pin shaft is a tubular structure, which extends radially along the serpentine bone and passes through two first tongues at the same end of the serpentine bone. The pin shaft includes a tube section, a deformation section and an end section from the middle to both ends. The tube section is cut and formed with a spiral wire, and the spiral wire is elastic. The spiral wire is the support member; the deformation section has a plurality of deformation strips evenly arranged around the circumference, and the two ends of the deformation strip are respectively provided with a first deformable groove at the connection between the end section and the sliding tube, and a second deformable groove is provided in the middle of the deformation strip; when both ends of the pin shaft are subjected to axial pressure, the deformation strip is plastically deflected and deformed in a direction away from the axis of the pin shaft, so that the deformation strip has a first deformation portion and a second deformation portion, wherein the surface composition of each first deformation portion forms the conical surface.

[0019] By adopting the above technical scheme, during installation, the pin is extended radially along the serpentine and passes through the two first tongues at the same end of the serpentine. Then, pressure along the axial direction of the pin is applied to both ends of the pin and tightening forces in opposite directions are applied to the two end sections to force the spiral wire to be tightened and compressed. At this time, the overall length of the pin is shortened, and the two deformation sections are close to each other (that is, the deformation section is located in the inner cavity of the serpentine). Then, pressure along the axial direction of the pin is continued to be applied to both ends of the pin. Since the spiral wire cannot continue to be compressed, the axial pressure is applied to the deformation section, thereby forcing the deformation strip to be plastically deflected and deformed in a direction away from the axis of the pin, so that the deformation strip has a first deformation portion and a second deformation portion. Then, the pin is released, the spiral wire releases elastic potential energy, and the two deformation sections rotate and move away from each other. The two first deformation portions respectively cooperate with the first chamfer and the second chamfer on both sides, so that the pin, the first perforation and the second perforation are coaxially arranged, thereby ensuring the bending accuracy of the serpentine.

[0020] In addition, the integrally formed spiral wire has greater rigidity and has a greater axial limiting effect on the first deformation portion, thereby greatly improving the fitting effect between the tapered surface and the first chamfer and the second chamfer, respectively, making the coaxiality more stable and further ensuring the bending accuracy of the snake bone.

[0021] Optionally, a first hemispherical protrusion is fixed on the surface of the first chamfer of one of the first through-holes of the snake bone, and a second hemispherical protrusion is fixed on the surface of the second chamfer of one of the second through-holes of the snake bone, and the first protrusion and the second protrusion are located on the same side of the snake bone; the first protrusion and the second protrusion are both located in the gap between two adjacent deformation strips.

[0022] By adopting the above technical solution, when adjacent snake bones rotate, the first convex point and the second convex point move circumferentially relative to the deformation strip, and the first convex point or the second convex point will force the first deformation part to bend and deform to avoid the first convex point or the second convex point, that is, when the adjacent snake bones rotate to any point, the first convex point or the second convex point is respectively stuck in the gap of different deformation strips, that is, the first convex point and the second convex point limit the rotation of the snake bone at multiple points, thereby realizing the segmented bending of the whole snake bone, so as to limit the bending nodes of the snake bone, and effectively improve the stability of the whole snake bone after bending.

[0023] Secondly, the first protrusion and the second protrusion are both located on the same side of the snake bone, while the first tongue piece and the second tongue piece on the other side of the snake bone have no first protrusion and the second protrusion. Therefore, when the first protrusion and the second protrusion force the adjacent first deformation part to elastically deform and avoid, the elastic force will be applied to the first deformation part at the other end of the pin shaft, thereby making the first deformation part fit more closely with the first chamfer and the second chamfer, thereby further improving the coaxiality during the rotation of the snake bone.

[0024] Optionally, the first protrusion and the second protrusion are respectively located on two opposite sides of the axis of the first perforation; and the width of each of the deformation strips gradually decreases in a direction away from the second protrusion.

[0025] By adopting the above technical solution, the larger the width of the deformation strip, the more difficult it is to deform the deformation strip, and the greater the bending resistance of the snake bone, thereby achieving an effect of greater damping as the bending angle of the snake bone increases, facilitating precise adjustment at large bending angles.

[0026] Optionally, a third deformable groove is provided at the connection between the connecting plate and the connecting portion.

[0027] By adopting the above technical solution, the ease of plastic deformation of the connecting plate can be improved.

[0028] Optionally, the edges of the first chamfer and the second chamfer are both rounded.

[0029] By adopting the above technical solution, the edge burrs of the first chamfer and the second chamfer can be reduced.

[0030] The present application provides an endoscope, which adopts the following technical solution:

[0031] An endoscope includes a snake assembly.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] By setting the first chamfer, the second chamfer, the pin and the support, since the diameter of the pin is smaller than the diameter of the first through hole and the second through hole, the pin can be easily installed. Secondly, the support will force the pin to move radially away from the axis of the snake bone, so that the conical surface of the pin fits the second chamfer and the first chamfer together. Through this fit, the positions of the first tongue piece and the second tongue piece are corrected, so that the first through hole, the second through hole and the pin are coaxially arranged, that is, the rotation axis of the adjacent snake bones is in a fixed position, thereby improving the bending accuracy of the snake bone.

[0034] By setting the tube section, the deformation section and the end section, it is not only convenient to thread and install the pin shaft, but also the plastic deformation of the deformation section is used to form a conical surface, and then the elastic force of the spring is used to realize the coaxial arrangement of the pin shaft, the first perforation and the second perforation, that is, one pin shaft completes the installation of two riveting points, which is faster and more convenient, and the coaxiality of the first tongue piece and the second tongue piece at the same end of the snake bone is higher, and secondly, it can effectively reduce the occupation of the outer space of the snake bone by the end of the pin shaft;

[0035] By setting the first convex point and the second convex point to cooperate with the gap of the deformation strip respectively, the bending of the snake bone can be limited at multiple points, thereby realizing segmented bending, so as to limit the bending nodes of the snake bone and effectively improve the stability of the overall snake bone after bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a longitudinal cross-sectional view of the snake bone of Example 1.

[0037] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0038] Figure 3 It is a schematic diagram of the support member of Example 2.

[0039] Figure 4 It is a partial cross-sectional view of Example 2, which is used to illustrate the matching relationship between the support member and the pin shaft.

[0040] Figure 5 It is a longitudinal cross-sectional view of the snake bone of Example 3.

[0041] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle.

[0042] Figure 7 yes Figure 5 A partial enlarged view of point C in the middle.

[0043] Figure 8 It is a schematic diagram of the deformation strip of Example 3 after plastic bending deformation.

[0044] Fig. 9It is a longitudinal cross-sectional view of the snake bone of Example 4.

[0045] Fig.10 It is a partial cross-sectional view of Example 5 for illustrating the matching relationship between the first deformation portion and the first tongue piece and the second tongue piece.

[0046] Fig.11 It is a top view of Example 5, which is used to illustrate the matching relationship between the first protrusion and the second protrusion and the deformation strip respectively.

[0047] Fig.12 It is a top view of Example 6 for illustrating the matching relationship between the first protrusion and the second protrusion and the deformation strip respectively.

[0048] Description of reference numerals: 1, pin; 2, support member; 10, snake bone; 100, tapered surface; 101, first tongue piece; 102, second tongue piece; 103, first through hole; 104, second through hole; 105, first chamfer; 106, second chamfer; 107, first convex point; 108, second convex point; 11, tapered block; 12, slot; 13, annular groove; 131, guide surface; 14, tube body Segment; 141, sliding tube; 15, deformation segment; 151, deformation strip; 152, first easily deformable groove; 153, second easily deformable groove; 154, first deformation part; 155, second deformation part; 16, end section; 21, sleeve; 22, elastic claw; 23, card; 24, connecting part; 25, connecting plate; 251, wedge strip; 252, third easily deformable groove; 26, spring; 27, spiral wire. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1 -Attached Fig.12 This application is described in further detail.

[0050] Example 1, Example 1 discloses a snake bone 10 component. Figure 1 The snake bone 10 assembly includes a plurality of snake bones 10 and a connecting assembly located between two adjacent snake bones 10. The snake bones 10 are steel tubular structures. The connecting assembly is used to connect two adjacent snake bones 10 and enable the two adjacent snake bones 10 to rotate and cooperate.

[0051] like Figure 1 , Figure 2 As shown, the connecting component includes a first tongue piece 101, a second tongue piece 102, a pin shaft 1 and a support member 2. The first tongue piece 101 and the second tongue piece 102 are respectively integrally formed at the two ends of the snake bone 10. Specifically, one end of the snake bone 10 has two first tongue pieces 101, and the two first tongue pieces 101 are respectively located on the upper side and the lower side of the end of the snake bone 10, and the other end of the snake bone 10 has two second tongue pieces 102, and the two second tongue pieces 102 are respectively located on the upper side and the lower side of the end of the snake bone 10.

[0052] When adjacent snake bones 10 are connected, the first tongue pieces 101 and the second tongue pieces 102 at the proximal ends of two adjacent snake bones 10 overlap, and the first tongue piece 101 is disposed away from the axis of the snake bones 10 relative to the second tongue piece 102 .

[0053] Furthermore, there is a gap between the first tongue piece 101 and the second tongue piece 102 of two adjacent snake bones 10 along the radial direction of the snake bone 10 , that is, the first tongue piece 101 and the second tongue piece 102 are not in direct contact.

[0054] The first tongue piece 101 has a circular first through hole 103, the diameter of the first through hole 103 is larger than the pin shaft 1, and the edge of the opening of the first through hole 103 is coaxially provided with an annular first chamfer 105. The second tongue piece 102 has a circular second through hole 104, the diameter of the second through hole 104 is larger than the first through hole 103, and the edge of the opening of the second through hole 104 is coaxially provided with an annular second chamfer 106. The edges of the first chamfer 105 and the second chamfer 106 are both provided with rounded corners.

[0055] The pin shaft 1 passes through the first through hole 103 and the second through hole 104 . A conical block 11 is integrally formed at one end of the pin shaft 1 . The conical hole has a conical surface 100 .

[0056] The support member 2 is used to force the pin shaft 1 to move radially away from the axial direction of the snake bone 10, so that the conical surface 100 of the pin shaft 1 fits together with the second chamfer 106 and the first chamfer 105. Specifically, the support member 2 includes a sleeve 21 sleeved on the pin shaft 1, the sleeve 21 is made of steel, and one end of the sleeve 21 is integrally formed with a plurality of cards 23 extending along its own radial direction, and each card 23 is evenly arranged along the circumference of the sleeve 21, and the other end of the sleeve 21 is integrally formed with a plurality of elastic claws 22, the elastic claws 22 are strip-shaped, the elastic claws 22 are inclined, and each elastic claw 22 is evenly arranged along the circumference of the sleeve 21.

[0057] An annular groove 12 is provided at the end of the pin 1 away from the conical block 11 .

[0058] During installation, the pin 1 is first passed through the first through hole 103 and the second through hole 104. Since the diameter of the pin 1 is smaller than that of the first through hole 103 and the second through hole 104, the pin 1 is easily passed through. Then the pin 1 is moved so that the conical surface 100 of the pin 1 fits the second chamfer 106 and the first chamfer 105 together. Then the sleeve 21 is sleeved on the pin 1. At this time, the card 23 elastically deforms to avoid the end of the pin 1 and is inserted into the card slot 12, so that the sleeve 21 and the pin 1 have axial limit. At this time, the end of the elastic claw 22 elastically abuts against the first The elastic force of the elastic claw 22 on the surface of the tongue piece 101 away from the second tongue piece 102 will force the pin 1 to move radially away from the axial direction of the snake bone 10, that is, the elastic force of the elastic claw 22 will further force the conical surface 100 of the pin 1 to fit together with the second chamfer 106 and the first chamfer 105, that is, through this fitting, the positions of the first tongue piece 101 and the second tongue piece 102 are corrected, so that the first through hole 103, the second through hole 104 and the pin 1 are coaxially arranged, that is, the rotation axis of the adjacent snake bones 10 is in a fixed position, thereby improving the bending accuracy of the snake bone 10.

[0059] Moreover, during the rotation of the snake bone 10, the elastic force of the elastic claw 22 will resist the axial tension of the snake bone 10, thereby reducing the axial movement of the pin shaft 1 relative to the snake bone 10 due to excessive axial tension of the snake bone 10, thereby reducing the gap between the conical surface 100 and the first chamfer 105 and the second chamfer 106, thereby ensuring the bending accuracy of the snake bone 10.

[0060] Secondly, by setting a radial gap between the first tongue piece 101 and the second tongue piece 102 of two adjacent snake bones 10, since the first tongue piece 101 and the second tongue piece 102 are in the form of thin sheets, they have a certain radial elastic displacement capability. Therefore, when the support member 2 drives the pin shaft 1 to move, through the cooperation of the tapered surface 100 of the pin shaft 1 with the second chamfer 106 and the first chamfer 105, the force of the support member 2 will correct the first tongue piece 101 and the second tongue piece 102 with large position processing errors, so as to ensure that the first through hole 103, the second through hole 104 and the pin shaft 1 are coaxially arranged, thereby reducing the occurrence of poor coaxiality due to processing errors.

[0061] Embodiment 1 also discloses an endoscope, comprising the above-mentioned snake bone 10 assembly.

[0062] Embodiment 2, embodiment 2 is different from embodiment 1 in that, Figure 3 , Figure 4As shown, the support member 2 is configured as a C-shaped member, which is made of metal. The C-shaped member includes an arc-shaped connecting portion 24, and connecting plates 25 are integrally formed on both sides of the connecting portion 24. The two connecting plates 25 are respectively located on both sides of the pin shaft 1, and the upper and lower sides of the connecting plate 25 are respectively configured as a guiding side and abutting sides, wherein the guiding side is integrally formed with a wedge strip 251.

[0063] In addition, a third deformable groove 252 is provided at the connection between the connecting plate 25 and the connecting portion 24 , so as to facilitate the plastic deformation of the connecting plate 25 relative to the connecting portion 24 .

[0064] An annular groove 13 is provided at the end of the pin shaft 1 , and a groove wall of the annular groove 13 has a guide surface 131 .

[0065] After the pin 1 is inserted into the first through hole 103 and the second through hole 104, the pin 1 is moved along the axial direction of the pin 1 so that the conical surface 100 of the pin 1 is jointly fitted to the second chamfer 106 and the first chamfer 105. Then, the C-shaped piece is placed on the surface of the first tongue piece 101. At this time, the end of the pin 1 is located in the enclosed area of ​​the C-shaped piece, that is, the two connecting plates 25 are respectively located on both sides of the pin 1, and the abutting side of the connecting plate 25 abuts against the surface of the first tongue piece 101. Then, the two connecting plates 25 are pressed at the same time so that the connecting plates 25 are moved along the axial direction toward the snake bone 10. The wedge strip 251 moves in radial plastic deformation, and at this time, the wedge strip 251 penetrates into the annular groove 13 until the inclined surface of the wedge strip 251 fits with the guide surface 131. Therefore, the force of the connecting plate 25 converts the cooperation between the inclined surface of the wedge strip 251 and the guide surface 131 into a force that forces the pin shaft 1 to move radially away from the axial direction of the snake bone 10, which will further force the tapered surface 100 of the pin shaft 1 to fit together with the second chamfer 106 and the first chamfer 105, thereby ensuring the coaxiality of the pin shaft 1, the first tongue piece 101 and the second tongue piece 102, so as to improve the bending accuracy of the snake bone 10.

[0066] Moreover, when the plastic deformation and movement of the connecting plate 25 are completed, the position of the connecting plate 25 remains unchanged, and the connecting plate 25 axially limits the pin shaft 1. The limiting effect can resist the axial tension of the snake bone 10, thereby reducing the excessive axial tension of the snake bone 10 and causing the pin shaft 1 to move axially relative to the snake bone 10, thereby reducing the occurrence of gaps between the conical surface 100 and the first chamfer 105 and the second chamfer 106, thereby ensuring the bending accuracy of the snake bone 10.

[0067] Embodiment 3, embodiment 3 is different from embodiment 1 in that, Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the pin shaft 1 is a tubular structure, which extends radially along the snake bone 10 and passes through two first tongue pieces 101 at the same end of the snake bone 10 .

[0068] The pin shaft 1 includes a tube section 14, a deformation section 15 and an end section 16 in sequence from the middle to the two ends, that is, the pin shaft 1 includes a tube section 14, two symmetrical deformation sections 15 and two symmetrical end sections 16. The tube section 14 includes two separately arranged slide tubes 141, the two slide tubes 141 are axially slidably matched, and the two slide tubes 141 are respectively connected to the adjacent deformation sections 15 in an integral molding. The support member 2 is set as a spring 26, the spring 26 is coaxial with the pin shaft 1, and the two ends of the spring 26 are respectively in contact with the two slide tubes 141, and the elastic force of the spring 26 forces the two slide tubes 141 to slide away from each other.

[0069] The deformation segment 15 has a plurality of deformation strips 151 evenly arranged around the circumference, and the two ends of the deformation strip 151 are integrally connected with the end segment 16 and the sliding tube 141, that is, the deformation segment 15 can be laser cut to form a plurality of strip holes, and the portion of the deformation segment 15 located between two adjacent strip holes is the deformation strip 151.

[0070] In addition, first deformable grooves 152 are respectively provided at the connection points between the two ends of the deformable strip 151 and the end section 16 and the sliding tube 141 , and a second deformable groove 153 is provided in the middle of the deformable strip 151 .

[0071] When the pin 1 is not installed, the pin 1 is in the shape of a straight tube as a whole, so as to facilitate the overall penetration of the pin 1. When installing, the pin 1 is passed through the two first tongues 101 at the same end of the snake bone 10 along the radial direction of the snake bone 10, and then the pressure along the axial direction of the pin 1 is applied to both ends of the pin 1, so that the spring 26 is compressed and the two deformation sections 15 are close to each other (that is, the deformation section 15 is located in the inner cavity of the snake tube). Then, the pressure along the axial direction of the pin 1 is continued to be applied to both ends of the pin 1. Since the spring 26 cannot be further compressed, the axial pressure is applied to the deformation section 15, thereby forcing the deformation strip 151 to perform plastic deflection deformation in the direction away from the axis of the pin 1 (in order to reduce the occurrence of inward bending deformation of the deformation strip 151, a core rod can be inserted into the hollow part of the pin 1 in advance, and the outer peripheral surface of the core rod will limit the inward bending of the deformation strip 151). The strip 151 has a first deformation portion 154 and a second deformation portion 155 (the boundary between the first deformation portion 154 and the second deformation portion 155 is the second easily deformable groove 153, the boundary between the first deformation portion 154 and the end section 16 is the first easily deformable groove 152, and the boundary between the second deformation portion 155 and the slide tube 141 is the first easily deformable groove 152). The surface composition of each first deformation portion 154 forms a tapered surface 100. Then the pin 1 is released, the spring 26 releases the elastic potential energy, and the two slide tubes 141 move away from each other to force the two first deformation portions 154 to move away from each other. The tapered surfaces 100 of the first deformation portions 154 at both ends of the pin 1 are respectively matched with the first chamfers 105 and the second chamfers 106 on both sides of the snake bone 10, so that the pin 1, the first through hole 103 and the second through hole 104 are coaxially arranged, thereby ensuring the bending accuracy of the snake bone 10.

[0072] Furthermore, by providing the tube section 14, the deformation section 15 and the end section 16, not only is it convenient to thread and install the pin 1, but also the plastic deformation of the deformation section 15 is utilized to form a conical surface 100, and then the elastic force of the spring 26 is used to realize the coaxial arrangement of the pin 1, the first through hole 103 and the second through hole 104, that is, one pin 1 completes the installation of two riveting points, which is faster and more convenient; and, the coaxiality of the first tongue piece 101 and the second tongue piece 102 at the same end of the snake bone 10 is relatively high; secondly, it can also effectively reduce the occupation of the external space of the snake bone 10 by the end of the pin 1.

[0073] Embodiment 4, embodiment 4 is different from embodiment 3 in that, Fig. 9 As shown, the tube body segment 14 is formed with a spiral wire 27 by laser cutting, that is, the tube body segment 14 is laser cut, and the portion of the tube body segment 14 that is not cut is the spiral wire 27. The spiral wire 27 is spiral-shaped, and the spiral wire 27 is integrally connected to the deformation segments 15 at both ends, and is made elastic by local heat treatment. The spiral wire 27 is the support member 2.

[0074] When the pin 1 is not installed, the pin 1 is in a straight tube shape as a whole, so as to facilitate the overall penetration of the pin 1. When installing, the pin 1 is passed through the two first tongues 101 at the same end of the snake bone 10 along the radial direction of the snake bone 10, and then the two ends of the pin 1 are jointly applied with an axial pressure of the pin 1 and a tightening force in opposite directions is applied to the two end sections 16 to force the spiral wire 27 to be tightened and compressed. At this time, the overall length of the pin 1 is shortened, and the two deformation sections 15 are close to each other (that is, the deformation section 15 is located in the inner cavity of the snake tube). Then, the two ends of the pin 1 continue to jointly apply an axial pressure of the pin 1. Since the spiral wire 27 cannot continue to be compressed, the axial pressure It is applied to the deformation section 15, thereby forcing the deformation strip 151 to perform plastic deflection deformation in the direction away from the axial center of the pin shaft 1, so that the deformation strip 151 has a first deformation portion 154 and a second deformation portion 155, and then the pin shaft 1 is released, and the spiral wire 27 releases the elastic potential energy (the spiral wire 27 is loosened and axially expanded), so that the two deformation sections 15 rotate relative to each other and move away from each other, and the conical surfaces 100 of the first deformation portion 154 at both ends of the pin shaft 1 are respectively matched with the first chamfer 105 and the second chamfer 106 on both sides of the snake bone 10, so that the pin shaft 1, the first through hole 103 and the second through hole 104 are coaxially arranged, thereby ensuring the bending accuracy of the snake bone 10.

[0075] In addition, the one-piece spiral wire 27 has greater rigidity, and it requires axial pressure and tightening force to compress the spiral wire 27. Therefore, the spiral wire 27 has a greater axial limiting effect on the first deformation portion 154, so as to greatly improve the fitting effect between the conical surface 100 and the first chamfer 105 and the second chamfer 106, respectively, so that the coaxiality stability is stronger, further ensuring the bending accuracy of the snake bone 10.

[0076] Embodiment 5, embodiment 5 is different from embodiment 4 in that, Fig.10 , Fig.11 As shown, a hemispherical first convex point 107 is fixed on the surface of a first chamfer 105 of one of the first through holes 103 of the snake bone 10, and a hemispherical second convex point 108 is fixed on the surface of a second chamfer 106 of one of the second through holes 104 of the snake bone 10. The first convex point 107 and the second convex point 108 are respectively located on opposite sides of the axis of the first through hole 103, and the first convex point 107 and the second convex point 108 are located on the same side of a single end of the snake bone 10 ( Fig.10 The first protrusion 107 and the second protrusion 108 are only located on the upper side of the snake bone 10), that is, the first tongue piece 101 and the second tongue piece 102 on the other side of the single end of the snake bone 10 have no first protrusion 107 and the second protrusion 108.

[0077] The first protrusion 107 and the second protrusion 108 are both located in the gap between two adjacent deformation strips 151 .

[0078] When adjacent snake bones 10 rotate, the first protrusion 107 and the second protrusion 108 move circumferentially relative to the deformation strip 151, and the first protrusion 107 or the second protrusion 108 will force the first deformation part 154 to bend and deform elastically. The first deformation part 154 bends and deforms elastically to avoid the first protrusion 107 or the second protrusion 108, that is, the adjacent snake bones 10 rotate to any circumferential point position, and the first protrusion 107 or the second protrusion 108 is respectively stuck in the gap of different deformation strips 151, that is, the first protrusion 107 and the second protrusion 108 limit the rotation of the snake bone 10 at multiple circumferential points, thereby realizing the segmented bending of the entire snake bone 10, so as to limit the single bending node of the snake bone 10, and effectively improve the stability of the entire snake bone 10 after bending.

[0079] Secondly, the first protrusion 107 and the second protrusion 108 are both located on the same side of the snake bone 10 ( Fig.10 The first protrusion 107 and the second protrusion 108 are only located on the upper side of the snake bone 10), so when the first protrusion 107 and the second protrusion 108 force the adjacent first deformation part 154 to elastically deform and avoid, the elastic force will be applied to the first deformation part 154 at the other end of the pin shaft 1, so that the first deformation part 154 and the first chamfer 105 and the second chamfer 106 are more closely matched (the first chamfer 105 and the second chamfer 106 are the first chamfer 105 and the second chamfer 106 on the lower side of the snake bone 10), so that the coaxiality of the snake bone 10 during rotation is further improved.

[0080] Embodiment 6, embodiment 6 is different from embodiment 5 in that, Fig.12 As shown ( Fig.12The direction of the arrow in the figure is the rotation direction of the snake bone 10 with the first protrusion 107 relative to the other snake bone 10). In the initial state (when the snake bone 10 is not rotated), the first protrusion 107 and the second protrusion 108 are respectively located on opposite sides of the axis of the first through hole 103. In this state, the width of each deformation strip 151 gradually decreases along the direction away from the second protrusion 108, that is, the closer to the first protrusion 107, the smaller the width of the deformation strip 151, and the closer to the second protrusion 108, the larger the width of the deformation strip 151. The larger the width of the deformation strip 151, the greater the difficulty of elastic deformation of the deformation strip 151, and the more difficult it is for the first protrusion 107 to pass over the deformation strip 151, so that the snake bone 10 needs a larger rotation driving force to rotate the snake bone 10 relative to the other snake bone 10, thereby making the bending resistance of the snake bone 10 larger, thereby achieving the effect of greater damping when the bending angle of the snake bone 10 is larger, so as to facilitate precise adjustment under large bending angles.

[0081] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A snake bone assembly, characterized in that: The invention comprises a plurality of snake bones (10) and a connecting component located between two adjacent snake bones (10), wherein the connecting component comprises a first tongue piece (101), a second tongue piece (102), a pin shaft (1) and a supporting member (2), wherein the first tongue piece (101) and the second tongue piece (102) are respectively integrally formed at two ends of the snake bone (10), the first tongue piece (101) is arranged away from the axis of the snake bone (10) relative to the second tongue piece (102), a gap is provided between the first tongue piece (101) and the second tongue piece (102) of two adjacent snake bones (10) along the radial direction of the snake bone (10), the first tongue piece (101) has a first through hole (103), and the first through hole (103) is provided with a first through hole (103). The edge of the hole is coaxially provided with an annular first chamfer (105); the second tongue piece (102) has a second through hole (104); the hole edge of the second through hole (104) is coaxially provided with an annular second chamfer (106); the pin shaft (1) passes through the first through hole (103) and the second through hole (104) together, and the diameter of the pin shaft (1) is smaller than the diameter of the first through hole (103) and the second through hole (104); the pin shaft (1) has a conical surface (100); the support member (2) is installed and matched with the pin shaft (1); the support member (2) forces the pin shaft (1) to move radially in a direction away from the axis of the snake bone (10), so that the conical surface (100) of the pin shaft (1) 00) are jointly fitted to the second chamfer (106) and the first chamfer (105); the pin shaft (1) is a tubular structure, the pin shaft (1) extends radially along the snake bone (10) and passes through the two first tongues (101) at the same end of the snake bone (10), the pin shaft (1) comprises a tube section (14), a deformation section (15) and an end section (16) from the middle to the two ends, wherein the tube section (14) comprises two separately arranged sliding tubes (141), the two sliding tubes (141) are axially slidingly matched, and the two sliding tubes (141) are respectively connected to the adjacent deformation sections (15) in an integral molding, and the support member (2) is set as a spring (26), and the spring (26) is used to force the two sliding tubes (141) to move. The tubes (141) slide away from each other; the deformation section (15) has a plurality of deformation strips (151) evenly arranged around the circumference, and the two ends of the deformation strip (151) are respectively provided with a first easily deformable groove (152) at the connection between the end section (16) and the sliding tube (141), and the middle of the deformation strip (151) is provided with a second easily deformable groove (153); when both ends of the pin shaft (1) are subjected to axial pressure, the deformation strip (151) is plastically deflected and deformed in a direction away from the axis of the pin shaft (1), so that the deformation strip (151) has a first deformation portion (154) and a second deformation portion (155), wherein the surface composition of each first deformation portion (154) forms the conical surface (100).

2. The snake bone assembly according to claim 1, characterized in that: A hemispherical first convex point (107) is fixed on the surface of the first chamfer (105) of one of the first through holes (103) of the snake bone (10), and a hemispherical second convex point (108) is fixed on the surface of the second chamfer (106) of one of the second through holes (104) of the snake bone (10), and the first convex point (107) and the second convex point (108) are located on the same side of the snake bone (10); the first convex point (107) and the second convex point (108) are both located in the gap between two adjacent deformation strips (151).

3. The snake bone assembly according to claim 1, characterized in that: The edges of the first chamfer (105) and the second chamfer (106) are both provided with rounded corners.

4. A snake bone assembly, characterized in that: The invention comprises a plurality of snake bones (10) and a connecting component located between two adjacent snake bones (10), wherein the connecting component comprises a first tongue piece (101), a second tongue piece (102), a pin shaft (1) and a supporting member (2), wherein the first tongue piece (101) and the second tongue piece (102) are respectively integrally formed at two ends of the snake bone (10), the first tongue piece (101) is arranged away from the axis of the snake bone (10) relative to the second tongue piece (102), a gap is provided between the first tongue piece (101) and the second tongue piece (102) of two adjacent snake bones (10) along the radial direction of the snake bone (10), and the first tongue piece (101) has a first through hole ( 103), the first through hole (103) has a first chamfer (105) coaxially arranged at the edge of the opening of the first through hole (103), the second tongue piece (102) has a second through hole (104), the second through hole (104) has a second chamfer (106) coaxially arranged at the edge of the opening of the second through hole (104); the pin shaft (1) passes through the first through hole (103) and the second through hole (104) together, and the diameter of the pin shaft (1) is smaller than the diameter of the first through hole (103) and the second through hole (104), and the pin shaft (1) has a conical surface (100); the support member (2) is installed and matched with the pin shaft (1); the support member (2) forces the pin shaft (1) to move away from the first through hole (103) and the second through hole (104). The serpentine (10) moves radially in the axial direction, so that the conical surface (100) of the pin shaft (1) is jointly fitted with the second chamfer (106) and the first chamfer (105); the pin shaft (1) is a tubular structure, the pin shaft (1) extends radially along the serpentine (10) and passes through two first tongues (101) at the same end of the serpentine (10); the pin shaft (1) comprises a tubular body section (14), a deformation section (15) and an end section (16) from the middle to both ends; the tubular body section (14) is cut and formed with a spiral wire (27), the spiral wire (27) is elastic, and the spiral wire (27) is the support member (2); the The deformation section (15) has a plurality of deformation strips (151) evenly arranged around the circumference, and first easily deformable grooves (152) are respectively provided at the connection points between the two ends of the deformation strip (151) and the end section (16) and the sliding tube (141), and a second easily deformable groove (153) is provided in the middle of the deformation strip (151); when both ends of the pin shaft (1) are subjected to axial pressure, the deformation strip (151) is plastically deflected and deformed in a direction away from the axis of the pin shaft (1), so that the deformation strip (151) has a first deformation portion (154) and a second deformation portion (155), wherein the surface composition of each first deformation portion (154) forms the conical surface (100).

5. The snake bone assembly according to claim 4, characterized in that: A hemispherical first convex point (107) is fixed on the surface of the first chamfer (105) of one of the first through holes (103) of the snake bone (10), and a hemispherical second convex point (108) is fixed on the surface of the second chamfer (106) of one of the second through holes (104) of the snake bone (10), and the first convex point (107) and the second convex point (108) are located on the same side of the snake bone (10); the first convex point (107) and the second convex point (108) are both located in the gap between two adjacent deformation strips (151).

6. The snake bone assembly according to claim 5, characterized in that: The first convex point (107) and the second convex point (108) are respectively located on opposite sides of the axis of the first through hole (103); the width of each deformation strip (151) gradually decreases in a direction away from the second convex point (108).

7. An endoscope, characterized in that: The invention comprises the snake bone component as claimed in claim 1.

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