Injection mold of endoscope snake bone, manufacturing method and endoscope snake bone

Abstract

The invention discloses an injection mold of an endoscope snake bone, a manufacturing method and the endoscope snake bone. The injection mold comprises a first mold and a second mold, the first mold comprises a first mold body, a first concave cavity is formed in the top of the first mold body, a plurality of first arc-shaped structures and baffles are arranged in the first concave cavity, and first grooves and first protrusions are arranged at the bottoms of the first arc-shaped structures in the axial direction; the second mold comprises a second mold body, a second concave cavity is formed in the top of the second mold body, a plurality of second arc-shaped structures are arranged in the second concave cavity side by side, second protrusions are arranged at the bottoms of the second arc-shaped structures, the second protrusions and the first grooves are the same in shape, and a second groove is formed between every two second protrusions; the second groove and the first protrusion are the same in shape. The endoscope snake bone main body is constructed in a secondary injection molding mode, and the metal wire is pre-embedded in the snake bone main body to construct the traction wire channel, so that the cost of the endoscope snake bone is reduced, and the burr problem in the injection molding process is avoided.

Description

Technical Field

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

[0002] An endoscope is a commonly used medical device. The front end includes an insertion part, which usually includes an endoscope head end and a snake bone. The endoscope head end is equipped with a camera and an LED light for easy observation of the inside of the human body. The snake bone can be used in a bent manner. There is a traction wire channel in the snake bone for the traction wire to pass through and drive the snake bone to bend. The insertion part can enter the human body through a human cavity or a surgical incision to observe the internal tissues of the human body and help doctors determine the location of the lesion in the patient's body and the tissue structure characteristics of the lesion location.

[0003] At present, most of the commonly used snake bones are made of metal. The process of making metal snake bones is complicated and the processing cycle is long, resulting in high costs. At the same time, due to cost constraints, the snake bones are made by laser cutting of metal tubes. The walls of the metal tubes are thin, the degree of meshing between the joints is insufficient, and the bending life of the snake bones is low. The traction wire channel needs to be cut and then stamped to construct a jig, which further increases the process.

[0004] Some snake bones are also made by injection molding, which reduces the cost. However, due to the characteristics of plastic materials, the strength of this type of snake bone is weaker than that of metal snake bones, and the service life is lower. At the same time, due to the injection molding process, the traction wire channel is prone to flashing problems. Summary of the invention

[0005] The main technical problem solved by the present invention is: to provide an injection mold, a manufacturing method and an endoscope snake bone for an endoscope snake bone, and to use a new injection molding process to manufacture the endoscope snake bone to avoid all or some of the above-mentioned defects.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing an injection mold of an endoscope snake bone, the injection mold comprising a first mold and a second mold;

[0007] The first mold comprises two first mold bodies symmetrically buckled, a first cavity is provided on the top of the first mold body, a plurality of first arc-shaped structures are arranged side by side in the first cavity, a baffle is provided between adjacent first arc-shaped structures, two adjacent first grooves are provided at the bottom of the first arc-shaped structure along the axial direction, a first protrusion is provided between the two first grooves, and a first injection port is provided at the end of the first arc-shaped structure;

[0008] The second mold includes two second mold bodies that are symmetrically interlocked, a second cavity is provided on the top of the second mold body, a plurality of second arc-shaped structures are arranged side by side in the second cavity, the spacing distance between the second arc-shaped structures is equal to the spacing distance between the baffles, two adjacent second protrusions are provided at the bottom of the second arc-shaped structure, the second protrusions have the same shape as the first grooves, a second groove is provided between the two second protrusions, the second groove has the same shape as the first protrusion, and second injection ports are provided at both ends of the second cavity.

[0009] The present invention also provides a method for manufacturing an endoscope snake bone, using the injection mold of the endoscope snake bone as claimed in claim 1, and the manufacturing method comprises the following steps:

[0010] S100: placing a core rod in a first mold, injecting molten plastic into the first mold to form a discontinuous parallel annular structure, wherein a slot is provided on the parallel annular structure;

[0011] S200: After the parallel annular structure is cooled and formed, a metal wire is placed in the slot;

[0012] S300: moving the core rod and the parallel annular structure to a second mold, injecting molten plastic into the second mold, and forming a continuous annular structure with connecting ribs on the outer surface of the parallel annular structure;

[0013] S400: After cooling and shaping, the metal wire is pulled out to form a traction wire channel, and the mandrel is pulled out to obtain the snake bone body.

[0014] The card slots in step S100 are formed by molten plastic at the first groove and the first protrusion, and there are multiple card slots, which are symmetrically arranged around the center of the parallel annular structure.

[0015] Wherein, the number of the card slots in step S100 is two, including a first card slot and a second card slot; the number of the metal wires in step S200 is two, including a first metal wire and a second metal wire.

[0016] The placing of the metal wire in the card slot in step S200 includes the following steps:

[0017] S201: placing the first metal wire in the second groove of the second mold along the axial direction;

[0018] S202: Open the first mold, and place the second metal wire in the second groove along the axial direction.

[0019] The manufacturing method further comprises the following steps:

[0020] S500: Prepare a head end connection ring, a tail end connection ring and a traction wire that are compatible with the snake bone body, weld one end of the traction wire to the head end connection ring as a whole, and then insert the traction wire into the traction wire channel.

[0021] The manufacturing method further comprises the following steps:

[0022] S600: Install the head end connection ring and the tail end connection ring on the two ends of the snake bone body respectively.

[0023] The present invention also provides an endoscopic snake bone, which includes a snake bone body formed by applying the manufacturing method of an endoscopic snake bone described in any one of claims 2-7, and the snake bone body includes a plurality of annular structures arranged in parallel, and adjacent annular structures are connected as a whole by connecting ribs, and the annular structure is provided with a traction wire channel running through it along the axial direction.

[0024] Among them, the endoscope snake bone also includes a head end connecting ring, a tail end connecting ring and a traction wire; the head end connecting ring and the tail end connecting ring are respectively installed at the two ends of the snake bone body; the traction wire is passed through the traction wire channel, and one end is fixedly connected to the head end connecting ring.

[0025] Among them, the material of the snake bone main body is plastic, the material of the head end connecting ring and the tail end connecting ring are both metal, and the head end connecting ring and the tail end connecting ring are both bonded to the snake bone main body.

[0026] Compared with the prior art, the injection mold, manufacturing method and endoscope snake bone of the present invention achieve the following beneficial effects: the endoscope snake bone body is constructed by secondary injection molding, and a traction wire channel is constructed by pre-embedding metal wire in the snake bone body, thereby reducing the cost of the endoscope snake bone and avoiding the flashing problem during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the first mold in the injection mold of the endoscope snake bone of the present invention;

[0029] Figure 2 yes Figure 1 A partial enlarged view of the middle A part;

[0030] Figure 3It is a structural schematic diagram of the second mold in the injection mold of the endoscope snake bone of the present invention;

[0031] Figure 4 yes Figure 3 A partial enlarged view of the middle B part;

[0032] Figure 5 It is a schematic diagram of the discontinuous parallel annular structure and the core rod structure formed after the first injection molding;

[0033] Figure 6 It is a schematic diagram of the structure of the continuous parallel ring structure, the core rod and the metal wire formed after the second injection molding;

[0034] Figure 7 It is a schematic diagram of the structure after the mandrel and the metal wire are pulled out of the continuous parallel annular structure;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the endoscope snake bone of the present invention;

[0036] Fig. 9 It is a schematic diagram of the disassembled structure of the endoscope snake bone of the present invention;

[0037] Fig.10 is a schematic diagram of the endoscope snake bone of the present invention before bending;

[0038] Fig.11 is a schematic diagram of the adjacent condyles of the endoscopic snake bone of the present invention being bent to the maximum extent;

[0039] Fig.12 It is a schematic diagram of the endoscope snake bone of the present invention being bent to the maximum extent as a whole. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] See also Figures 1 to 4 , Figure 1 It is a structural schematic diagram of the first mold in the injection mold of the endoscope snake bone of the present invention. The injection mold is used for injection molding and producing the endoscope snake bone. The injection molding is performed by two injection moldings. The injection mold includes a first mold 1 and a second mold 2. The two injection molding processes require the use of the first mold 1 and the second mold 2 in turn.

[0044] Specifically, the first mold 1 includes two first mold bodies 11 symmetrically buckled, and a first cavity 12 is provided on the top of the first mold body 11. The shape of the first cavity 12 is a combination of a semicircular part and a special-shaped part. For the convenience of explanation, the direction between the first cavities 12 opposite to the two first mold bodies 11 is called the up and down direction. A plurality of first arc-shaped structures 13 are arranged side by side in the first cavity 12, and a baffle 14 is provided between adjacent first arc-shaped structures 13. The baffle 14 isolates each first arc-shaped structure 13 during injection, and forms a discontinuous parallel annular structure after injection molding. Two adjacent first grooves 131 are provided at the bottom of the first arc-shaped structure 13, and a first protrusion 132 is provided axially between the two first grooves 131. After injection molding, a protruding part is formed at the first groove 131, and a concave part is formed at the first protrusion 132, forming a slot structure. After the first injection molding on the first mold 1, a discontinuous parallel annular structure is obtained after cooling, and the parallel annular structure also has a slot.

[0045] The shape of the slot structure can be arc, square, rectangular or special shape.

[0046] The number of the slot structures is two, four or more, and they are symmetrically arranged on the parallel annular structure. When two slot structures are arranged, the slot structures are arranged at the bottom of the first concave cavity 12. When four slot structures are arranged, the slot structures can be arranged at a 45-degree angle of the first concave cavity 12. The slot structures are used to place metal wires, and during the injection molding process, the second injection molding needs to be performed after the metal wires are placed in the slot structures.

[0047] The first arc-shaped structure 13 has a first injection port 133 at its end for injecting glue. Since a plurality of baffles 14 are provided in the first cavity 12, when the first mold 1 of the present invention is used for injection molding, each first arc-shaped structure 13 needs to be injected with glue separately.

[0048] During the first injection molding, a mandrel needs to be placed in the first cavity 12. To match the shape of the endoscope snake, the shape of the mandrel used is rectangular.

[0049] The second mold 2 is required for the second injection molding. The second mold 2 includes two second mold bodies 21 that are symmetrically buckled. A second cavity 22 is provided on the top of the second mold body 21. The shape of the second cavity 22 is semicircular. A plurality of second arc-shaped structures 23 are arranged side by side in the second cavity 22. The spacing distance between the second arc-shaped structures 23 is equal to the spacing distance between the baffles 14. Two adjacent second protrusions 231 are provided at the bottom of the second arc-shaped structure 23. The second protrusion 231 has the same shape as the first groove 131. A second groove 232 is provided between the two second protrusions 231. The second groove 232 has the same shape as the first protrusion 132. After injection molding, a concave portion is formed at the second protrusion 231, and a convex portion is formed at the second groove 232, which is compatible with the slot structure formed by the first injection molding. After the second injection molding on the second mold 2, a continuous parallel annular structure is obtained after cooling. The part divided by the second arc-shaped structure 23 in the middle forms a connecting rib. The overall external shape is a hollow circle, and the internal shape is the same as that of the mandrel.

[0050] The second cavity 22 is provided with second injection ports 221 at both ends thereof for injecting plastic. When the second mold 2 is used for injection molding, the second cavity 22 is injected from both ends thereof, and the molten plastic flows to the middle portion.

[0051] The present invention also provides a method for manufacturing an endoscope snake bone, using the injection mold of the endoscope snake bone. Figures 5 to 7 , the manufacturing method of the present invention comprises the following steps:

[0052] S100: placing a core rod 100 in a first mold 1, injecting molten plastic into the first mold 1, forming a discontinuous parallel annular structure 200, and a slot 300 is provided on the parallel annular structure 200. The specific structure is as follows: Figure 5 shown.

[0053] S200: After the parallel annular structure 200 is cooled and shaped, a metal wire 400 is placed in the slot 300. The slot 300 may be in an arc, square, rectangular or special shape, wherein the cross-sectional shape of the metal wire 400 is the same as the shape of the slot 300. The material of the metal wire 400 may be stainless steel.

[0054] S300: Move the core rod 100 and the parallel annular structure 200 to the second mold 2. The above process can be placed manually or by setting a robot to move and place. During the movement, the gap between adjacent parallel annular structures 200 needs to be aligned with the second arc-shaped structure 23 in the second mold 2. Then, a second injection molding is performed to inject molten plastic into the second mold 2 to form a continuous annular structure 500 with connecting ribs on the outer surface of the parallel annular structure 200. The specific structure is as follows: Figure 6 shown.

[0055] In one embodiment, the material of the molten plastic injected during the first injection molding and the second injection molding is the same, that is, PP.

[0056] S400: After cooling and shaping, the metal wire 400 is pulled out to form a traction wire channel, and the mandrel 100 is pulled out to obtain the snake bone body. The specific structure is as follows Figure 7 shown.

[0057] In the step of pulling out the metal wire 400, a pulling mechanism can be used to stretch the metal wire 400. Since the metal wire 400 has a material property that its diameter decreases when stretched, the metal wire 400 can be pulled out from the injection molded part. After being pulled out, a through hole is formed that penetrates the metal wire 400 in the axial direction, which is the pulling wire channel.

[0058] In the step of pulling out the core rod 100 , manual core pulling, mechanical core pulling or pneumatic core pulling can be selected.

[0059] The snake bone body obtained by the above-mentioned two-time injection molding manufacturing method is made of plastic, which reduces the cost compared with the metal snake bone. During the second injection molding, a metal wire is placed in the card slot to isolate the contact of the two injection molding materials at the traction wire channel of the endoscope snake bone to avoid the formation of flashing and affect the quality of the injection molded product.

[0060] In the present application, the card slot 300 in step S100 is formed by molten plastic at the first groove 131 and the first protrusion 132 of the first mold 1 . There are multiple card slots 300 , and the multiple card slots 300 are symmetrically arranged around the center of the parallel annular structure 200 .

[0061] In the present application, the number of the slots 300 in step S100 is two, including a first slot and a second slot. For ease of explanation, the first slot is located at the lower part of the parallel annular structure 200, and the second slot is located at the upper part of the parallel annular structure. The number of the metal wires 400 in step S200 is two, including a first metal wire and a second metal wire. The first metal wire corresponds to the first slot, and the second metal wire corresponds to the second slot.

[0062] Placing the metal wire 400 in the card slot 300 in step S200 in the present application includes the following steps:

[0063] S201: A first metal wire is placed axially in the second groove of the second mold 2. Then, during the second injection molding, the parallel annular structure 200 and the core rod 100 are moved to the second mold 2, and the first metal wire is automatically inserted into the first groove.

[0064] S202: Open the first mold 1 and place the second metal wire in the second slot along the axial direction. The above process can be placed manually or by setting a robot to move and place.

[0065] The manufacturing method in this application also includes the following steps:

[0066] S500: Prepare a head end connection ring, a tail end connection ring and a traction wire that are compatible with the snake bone body. The shapes of the head end connection ring and the tail end connection ring are compatible with the two ends of the snake bone body, and the material of the head end connection ring and the tail end connection ring is metal, such as stainless steel. A welding position is reserved on the inner wall of the head end connection ring, and one end of the traction wire is welded to the head end connection ring as a whole, and then the traction wire is inserted into the traction wire channel. The welding method can be brazing.

[0067] The manufacturing method in this application also includes the following steps:

[0068] S600: Install the head end connection ring and the tail end connection ring at the two ends of the snake bone body respectively. The connection method can be clamping or bonding.

[0069] See also Figures 8 to 12 , Figure 8 : is a schematic diagram of the three-dimensional structure of the endoscope snake bone of the present invention, and the endoscope snake bone of the present invention includes a snake bone body 3 formed by the manufacturing method of the endoscope snake bone described above. The snake bone body 3 includes a plurality of annular structures 31 arranged in parallel, and adjacent annular structures 31 are connected as a whole by connecting ribs 32, and the annular structures 31 are provided with a traction wire channel 33 penetrating along the axial direction.

[0070] The endoscope snake bone also includes a head end connection ring 4, a tail end connection ring 5 and a traction wire 6. The head end connection ring 4 and the tail end connection ring 5 are respectively installed at both ends of the snake bone body 3. The traction wire 6 is inserted into the traction wire channel 33, and one end is fixedly connected to the head end connection ring 4.

[0071] The snake bone body 3 is formed by two injection moldings using the above-mentioned manufacturing method of the endoscope snake bone. The final structure is a connecting rib 32 connecting the annular structure 31. The connecting rib 32 is located on opposite sides of the annular structure 31 in the axial direction and plays a connecting role. For ease of explanation, one end of the snake bone body 3 is called the head end and the other end is called the tail end. The head end is used to install the camera and LED light of the endoscope, and the tail end is used for the electrical connection line and the entry of the instrument. In actual use, the head end enters the human body and is located at the end closer to the patient's body, and the tail end is close to the operator and is located at the end away from the patient.

[0072] like Fig.10 and Fig.11 As shown, a bevel angle is designed between adjacent annular structures 31, and the bevel angle is θ. After the joints are fully bent, the two beveled surfaces between the joints near the bending angle coincide with each other. At this time, the snake bone bending angle is 2θ. Assuming the number of snake bone joints is n, and the full bending angle is α, the calculation formula for the full bending angle of the snake bone can be deduced as follows: α=θX(n-1). By setting the number of different annular structures 31 and the angle between adjacent annular structures 31, the maximum bending radius and bending angle of the endoscope snake bone can be controlled, and the parameters can be adjusted for different usage scenarios, so that different market demands can be quickly responded to and met.

[0073] The width of the ring structure 31 is also positively correlated with the bending radius and bending angle of the endoscope snake. When the snake is bent to the maximum extent, the inner diameter of the circular ring is the sum of the lengths of the bevel angles of the cross section of the ring structure 31 divided by the value of π, and the outer diameter is twice the inner diameter. Fig.12 As shown, when the endoscope snake is bent to the maximum extent, the diameter of the arc formed by the outer circumference is D, and the diameter of the arc formed by the inner circle is d, and the value of D is twice d. Setting the width of the annular structure 31 can also affect the bending sequence and bending shape of the snake, and the parameters can be adjusted according to different usage scenarios, and different market demands can be quickly responded to and met.

[0074] The length and width of the connecting rib 32 are positively correlated with the bending angle and bending amplitude of the endoscope snake bone. The longer the length of the connecting rib 32, the larger the bending angle and bending amplitude space of the snake bone, and vice versa. Taking the width of the connecting rib 32 as L as an example, the snake bone body 3 starts to bend from the head end when pulled by the traction wire 6. If L is larger, the deformation of the connection point between the snake bone joints is smaller, and the bending angle and bending amplitude of the snake bone are smaller. Conversely, the bending angle and bending amplitude of the snake bone are larger. Therefore, the bending angle and bending shape of the snake bone can be controlled by controlling the length and width of the connecting rib 32, and the parameters can be adjusted according to different usage scenarios, and different market demands can be quickly responded to and met.

[0075] Since the material of the snake bone body 3 is plastic, PP in one embodiment, the material is relatively soft and easily deformed, so the traction wire 6 cannot be directly fixed on the snake bone body 3, otherwise the snake bone body 3 will be directly stressed, and the snake bone body 3 will be easily deformed when the traction wire 6 is pulled, and material fatigue will cause damage to the snake bone body 3 after repeated use. Therefore, in this application, a head end connection ring 4 is set at the head end of the snake bone body 3, and the traction wire 6 is fixed on the head end connection ring 4. When the traction wire 6 is pulled, the head end connection ring 4 is subjected to tension, which prevents the snake bone body 3 from being stressed, and realizes that the traction wire 6 force is transmitted to the head end of the endoscope snake bone.

[0076] In the present application, the material of the head end connecting ring 4 is set to metal, such as stainless steel, which strengthens the end stress point of the plastic material snake bone body 3, can withstand the tensile force of multiple pulling of the traction wire 6, and avoid the snake bone body 3 from being deformed due to material strength problems, so that the endoscope snake bone can be reused many times, thereby improving the durability of the endoscope snake bone. The metal head end connecting ring 4 also improves the structural stability and integrity of the endoscope snake bone.

[0077] Specifically, a mutually nested structure is provided between the head end connection ring 4 and the snake bone body 3. For example, a protrusion is provided at the head end of the snake bone body 3, and a groove is provided at one end of the head end connection ring 4. The head end connection ring 4 can be quickly installed on the snake bone body 3 through the nesting of the protrusion and the groove, and the installation angle of the two is also limited. Then, glue is applied to the connection between the head end connection ring 4 and the snake bone body 3 to bond the head end connection ring 4 to the snake bone body 3. A welding point is provided on the inner wall of the head end connection ring 4, and the head end of the traction wire 6 is welded to the head end connection ring 4 after being bent 90 degrees.

[0078] Since the tail end of the endoscope snake bone is used to accommodate electrical connection wires and to allow other instruments to enter, such as sampling forceps, the tail end of the endoscope snake bone needs to play a role in connecting with other components and is required to have a certain strength. Therefore, in the present invention, a tail end connection ring 5 is provided at the tail end of the snake bone body 3, and the material of the tail end connection ring 5 is also metal, such as stainless steel. The tail end connection ring 5 is a hollow structure, and the inner wall size is larger than the outer diameter of the tail of the snake bone body 3. The installation method of the two is to set the tail end connection ring 5 outside the tail of the snake bone body 3, and then apply glue at the connection between the tail end connection ring 5 and the snake bone body 3, so that the head end connection ring 4 is bonded to the snake bone body 3.

[0079] Through the above arrangement, the head end connection ring 4 and the tail end connection ring 5 made of metal are respectively bonded to the two ends of the snake bone body 3 made of plastic material, and the end of the traction wire 6 is welded to the head end connection ring 4, so that the force of the traction wire 6 does not directly act on the snake bone body 3, avoiding the deformation of the endoscope snake bone due to material strength problems, and improving the structural stability and integrity of the snake bone. At the same time, in terms of processing technology, the traction wire 6 and the head end connection ring 4 are first welded, and then the traction wire 6 is inserted into the traction wire channel 33 of the snake bone body 3 to complete the snake bone threading assembly, thereby improving the assembly efficiency.

[0080] By using the injection mold, manufacturing method and endoscope snake bone of the endoscope snake bone of the present invention, the endoscope snake bone body is constructed by secondary injection molding, and a metal wire is pre-embedded in the snake bone body to construct a traction wire channel, thereby reducing the cost of the endoscope snake bone and avoiding the flash problem during the injection molding process.

[0081] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An injection mold for an endoscope snake bone, characterized in that: The injection mold comprises a first mold and a second mold; The first mold comprises two first mold bodies symmetrically buckled, a first cavity is provided on the top of the first mold body, a plurality of first arc-shaped structures are arranged side by side in the first cavity, a baffle is provided between adjacent first arc-shaped structures, two adjacent first grooves are provided at the bottom of the first arc-shaped structure along the axial direction, a first protrusion is provided between the two first grooves, and a first injection port is provided at the end of the first arc-shaped structure; The second mold includes two second mold bodies that are symmetrically interlocked, a second cavity is provided on the top of the second mold body, a plurality of second arc-shaped structures are arranged side by side in the second cavity, the spacing distance between the second arc-shaped structures is equal to the spacing distance between the baffles, two adjacent second protrusions are provided at the bottom of the second arc-shaped structure, the second protrusions have the same shape as the first grooves, a second groove is provided between the two second protrusions, the second groove has the same shape as the first protrusion, and second injection ports are provided at both ends of the second cavity.

2. A method for manufacturing an endoscope snake bone, using the injection mold of the endoscope snake bone according to claim 1, characterized in that: The manufacturing method comprises the following steps: S100: placing a core rod in a first mold, injecting molten plastic into the first mold to form a discontinuous parallel annular structure, wherein a slot is provided on the parallel annular structure; S200: After the parallel annular structure is cooled and formed, a metal wire is placed in the slot; S300: moving the core rod and the parallel annular structure to a second mold, injecting molten plastic into the second mold, and forming a continuous annular structure with connecting ribs on the outer surface of the parallel annular structure; S400: After cooling and shaping, the metal wire is pulled out to form a traction wire channel, and the mandrel is pulled out to obtain the snake bone body.

3. The method for manufacturing an endoscope snake bone according to claim 2, characterized in that: The card slots in the step S100 are formed by molten plastic at the first groove and the first protrusion. There are multiple card slots, and the multiple card slots are symmetrically arranged around the center of the parallel annular structure.

4. The method for manufacturing an endoscope snake bone according to claim 3, characterized in that: In step S100, the number of the card slots is two, including a first card slot and a second card slot; in step S200, the number of the metal wires is two, including a first metal wire and a second metal wire.

5. The method for manufacturing an endoscope snake bone according to claim 4, characterized in that: Placing the metal wire in the card slot in step S200 includes the following steps: S201: placing the first metal wire in the second groove of the second mold along the axial direction; S202: Open the first mold, and place the second metal wire in the second groove along the axial direction.

6. The method for manufacturing an endoscope snake bone according to claim 5, characterized in that: The manufacturing method further comprises the following steps: S500: Prepare a head end connection ring, a tail end connection ring and a traction wire that are compatible with the snake bone body, weld one end of the traction wire to the head end connection ring as a whole, and then insert the traction wire into the traction wire channel.

7. The method for manufacturing an endoscope snake bone according to claim 6, characterized in that: The manufacturing method further comprises the following steps: S600: Install the head end connection ring and the tail end connection ring on the two ends of the snake bone body respectively.

8. An endoscope snake bone, characterized in that: The endoscopic snake bone includes a snake bone body formed by applying the manufacturing method of the endoscopic snake bone described in any one of claims 2-7, and the snake bone body includes a plurality of annular structures arranged in parallel, and adjacent annular structures are connected as a whole by connecting ribs, and the annular structure is provided with a traction wire channel running through it along the axial direction.

9. The endoscope snake according to claim 8, characterized in that: The endoscope snake bone also includes a head end connecting ring, a tail end connecting ring and a traction wire; the head end connecting ring and the tail end connecting ring are respectively installed at the two ends of the snake bone body; the traction wire is passed through the traction wire channel, and one end is fixedly connected to the head end connecting ring.

10. The endoscope snake according to claim 9, characterized in that: The material of the snake bone main body is plastic, the material of the head end connecting ring and the tail end connecting ring are both metal, and the head end connecting ring and the tail end connecting ring are both bonded to the snake bone main body.

Images