Insertion assembly and assembly method therefor, and endoscope

Abstract

Disclosed in the present invention are an insertion assembly and an assembly method therefor, and an endoscope. The insertion assembly comprises an insertion main body, an elastic tube sleeve, a thread and an adhesive, wherein the insertion main body comprises a tip holder body, a bendable tube body and a connecting tube body, the bendable tube body being bendable and having an annular groove formed in at least one end or in the vicinity of the end; the elastic tube sleeve is sleeved on the outer periphery of the bendable tube body and covers the annular groove; the thread is wound on the side of the elastic tube sleeve facing away from the annular groove, and the thread comprises a coiled thread segment wound in multiple turns in the annular groove and two interference segments connected to two ends of the coiled thread segment, both the interference segments being arranged between the coiled thread segment and the elastic tube sleeve and extending in the widthwise direction of the annular groove, and the two interference segments being arranged in a crossed manner; and the adhesive is filled in the annular groove. According to the present invention, there is no knot, so that the surface of the side of the thread facing away from the elastic tube sleeve is relatively flat without an excessively protruding structure, which is conducive to minimizing the size of the tying part.

Description

Insertion components and their assembly methods, endoscope Technical Field

[0001] This invention relates to the field of endoscope technology, and particularly to the field of production and assembly technology of endoscope insertion components, specifically to an insertion component and its assembly method, and an endoscope. Background Technology

[0002] An endoscope generally consists of an insertion body and an operating body. The insertion body includes a headstock, a curved tube, and a connecting tube. The curved tube may also include an active bending section and a passive bending section. After the headstock, curved tube, and connecting tube of the insertion body are connected and fixed, a rubber sleeve needs to be fitted onto the curved tube, and the joints on both sides of the rubber sleeve are sealed with adhesive (usually epoxy resin).

[0003] Currently, fluororubber is generally used for the rubber sheath of endoscopes. Fluororubber has self-lubricating properties, which results in poor adhesion strength to epoxy resin. To improve adhesion strength, current technology uses activation equipment to first activate the bonding area before bonding. However, this method requires expensive specialized activation equipment; furthermore, the activation process is time-sensitive, requiring adhesive application within a certain timeframe after activation, which inconveniences the assembly of the insert.

[0004] To address this, one existing assembly method involves tying wires at the joints on both sides of the rubber tubing. The wires are wrapped 6-8 times and tightened, then the ends are knotted and excess wire is trimmed. However, due to the elasticity of fluororubber, the knots easily loosen during and after tying, and the knots protrude noticeably. This directly leads to an increase in the size of the tying area, which in turn increases the size of the sealant, ultimately resulting in a larger overall size of the inserted endoscope and limiting its usability. Technical issues

[0005] The main objective of this invention is to provide an insertion component and its assembly method, as well as an endoscope, which aims to solve the problem that traditional assembly methods for the insertion body tend to result in an increase in the overall size of the insertion body. Technical solutions

[0006] To achieve the above objectives, the present invention provides an insertion component comprising:

[0007] The insertion body includes a head end seat, a curved tube, and a connecting tube connected in sequence. The curved tube is adjustable and bendable. The insertion body has an annular groove around its circumference at at least one end or adjacent to the curved tube.

[0008] An elastic sleeve is fitted around the outer periphery of the curved tube and extends at least to cover the annular groove;

[0009] A wire is wound around the side of the elastic sleeve opposite to the annular groove. The wire includes a coil segment wound multiple turns within the annular groove and two interference segments connected to both ends of the coil segment. Both interference segments extend along the width of the annular groove and are at least partially confined between the coil segment and the elastic sleeve. The two interference segments are arranged in a crisscrossing manner.

[0010] The colloid is filled in the annular groove and at least covers the side of the filament facing away from the elastic sleeve.

[0011] Optionally, the annular groove is formed at a position on the head end seat adjacent to the curved tube body; and / or,

[0012] The annular groove is formed at a position on the connecting pipe body adjacent to the curved pipe body.

[0013] Optionally, the threads are arranged in a single layer within the annular groove; and / or,

[0014] The dimension of the wire in the depth direction of the annular groove is not greater than the depth of the annular groove; and / or,

[0015] The dimension of the thread in the width direction of the annular groove is adapted to the width of the annular groove; and / or,

[0016] The outer surface of the colloid is not lower than the opening of the annular groove.

[0017] In addition, to achieve the above objectives, the present invention also provides an endoscope, including an operating component and an insertion component as described above.

[0018] Furthermore, to achieve the above objectives, the present invention also provides an assembly method for the insertion component as described above, comprising:

[0019] An annular groove is formed at at least one end of the curved tube along its circumference.

[0020] A flexible tube is fitted around the outer periphery of the curved tube and covers the annular groove.

[0021] A starting line segment is obtained by extending a thread from the outside of the annular groove along the positive direction of the groove width into the annular groove.

[0022] The remaining wire is wound sequentially along the groove width in the opposite direction on the side of the starting segment opposite to the elastic sleeve until the preset number of turns is reached to obtain a coil segment;

[0023] Insert the remaining wire along the groove width into the space between the coil segment and the elastic sleeve, and extend it beyond the annular groove after intersecting with the starting segment to obtain the ending segment;

[0024] After tightening the starting line segment and the ending line segment to make the coil segment tightly bind the elastic sleeve, the line segments of the starting line segment and the ending line segment that extend beyond the annular groove are cut to obtain two interference segments;

[0025] The colloid is filled into the annular groove and cured.

[0026] Optionally, in the step of fitting an elastic sleeve around the outer periphery of the curved tube and covering the annular groove, the length of the elastic sleeve extends beyond the annular groove.

[0027] Optionally, after tightening the starting line segment and the ending line segment to tightly bind the elastic sleeve with the coil segment, and then cutting off the segments of the starting line segment and the ending line segment that extend beyond the annular groove to obtain two interference segments, the method further includes:

[0028] Cut off the portion of the elastic sleeve that extends beyond the annular groove.

[0029] Optionally, the step of inserting the remaining thread along the positive direction of the groove between the coil segment and the elastic sleeve, and extending it beyond the annular groove after intersecting with the starting thread segment to obtain the terminating thread segment includes:

[0030] The remaining groove is continued to be wound around the circumference of the insertion body until it passes the starting line segment. Then, it is bent along the positive direction of the groove width and inserted between the coil segment and the elastic sleeve, extending to the outside of the annular groove to obtain the termination line segment.

[0031] Furthermore, to achieve the above objectives, the present invention also provides an assembly method for the insertion component as described above, comprising:

[0032] An annular groove is formed at at least one end of the curved tube along its circumference.

[0033] A flexible tube is fitted around the outer periphery of the curved tube and covers the annular groove.

[0034] A starting line segment is obtained by extending a thread from the outside of the annular groove along the positive direction of the groove width into the annular groove.

[0035] An auxiliary tube is placed beside the starting line segment, extending along the width of the annular groove.

[0036] The remaining wire is wound in reverse along the groove width onto the starting segment and the side of the auxiliary tube opposite to the elastic sleeve until the preset number of turns is reached to obtain the coil segment;

[0037] The remaining groove continues to be wound around the circumference of the inserted body until it passes the starting line segment, then bends along the groove width in the positive direction and passes through the auxiliary tube, extending to the outside of the annular groove to obtain the termination line segment.

[0038] Remove the auxiliary tube;

[0039] After tightening the starting line segment and the ending line segment to make the coil segment tightly bind the elastic sleeve, the line segments of the starting line segment and the ending line segment that extend beyond the annular groove are cut to obtain two interference segments;

[0040] The colloid is filled into the annular groove and cured.

[0041] Optionally, the length of the auxiliary tube is not less than the width of the annular groove.

[0042] Optionally, the auxiliary tube is made of a flexible material.

[0043] Optionally, in the step of sequentially winding the remaining threads along the groove width in the opposite direction to the starting segment and the side of the auxiliary tube facing away from the elastic sleeve, the threads squeeze the auxiliary tube, causing the auxiliary tube to bend and deform at least at the annular groove.

[0044] Optionally, the compressive force exerted by the filament on the auxiliary tube is set to be less than the force required for the auxiliary tube to produce maximum deformation. Beneficial effects

[0045] In the technical solution provided by this invention, the annular groove serves two purposes: firstly, it provides a precise operating space for the wire winding process; secondly, it accommodates the wound wire, ensuring sufficient space to hold it and preventing excessive protrusion of the wire from the outer periphery of the insert. It also helps to limit the winding of the wire, preventing it from loosening relative to the elastic sleeve after winding, thus avoiding an increase in the size of the tie. Furthermore, because the two interference segments are clamped and limited between the coil segment and the elastic sleeve, combined with the elastic deformation of the elastic sleeve under force, a sufficiently strong mutual interference limit is formed between the interference segments, the elastic sleeve, and the coil segment. This replaces the knot, achieving the purpose of tightly binding the elastic sleeve within the annular groove. This application avoids the presence of knots, resulting in a relatively flat surface on the side of the wire facing away from the elastic sleeve without excessive protrusion. This helps to minimize the size of the tie, allowing the overall size design of the assembled insert to be unconstrained by the tie, ultimately increasing and enriching the application scenarios of the endoscope and improving its practicality. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0047] Figure 1 is a partial perspective view of an embodiment of the insertion component provided by the present invention;

[0048] Figure 2 is a schematic diagram showing the main structural breakdown of the inserted component in Figure 1;

[0049] Figure 3 is a three-dimensional schematic diagram of the silk thread in Figure 1;

[0050] Figure 4 is a flowchart illustrating the first embodiment of the assembly method for the insertion component provided by the present invention;

[0051] Figure 5 is a flowchart illustrating a second embodiment of the assembly method for the insertion component provided by the present invention;

[0052] Figure 6 is a schematic diagram of the structure corresponding to step S500 in Figure 4;

[0053] Figure 7 is a schematic diagram of the structure corresponding to step A600 in Figure 5.

[0054] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Embodiments of the present invention

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0056] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0057] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0058] Please refer to Figures 1 to 3. The present invention provides an insertion component that can be used in endoscopes, and is particularly suitable for use in reusable endoscopes.

[0059] Generally, an endoscope includes an insertion component and an operating component. The operating component is detachably connected to the insertion component. During the procedure, the insertion component is at least partially inserted into the patient's body, while the operating component remains outside the patient's body and is primarily operated manually by medical personnel to control the insertion component in performing relevant procedures on the affected area within the patient's body.

[0060] However, since the main inventive point of this invention lies in the improvement of the insertion component, the structure of the insertion component will be specifically described in the following embodiments with reference to Figures 1 to 3.

[0061] In this embodiment, the insertion assembly includes an insertion body 100, an elastic sleeve 200, a thread 300, and a gel 400. The insertion body 100 includes a head end seat 110, a curved tube section 120, and a connecting tube 130 connected in sequence. The curved tube section 120 is adjustable and bendable. The insertion body 100 has an annular groove 140 circumferentially formed around at least one end or adjacent to the curved tube section 120. The elastic sleeve 200 is fitted around the outer periphery of the curved tube section 120 and extends at least to cover the annular groove 140. The thread 300 is wound around the elastic sleeve 200 opposite to the annular groove 140. On one side, the filament 300 includes a coil segment 320 wound in multiple turns within the annular groove 140, and two interference segments respectively connected to both ends of the coil segment 320. Both interference segments extend along the width direction of the annular groove 140 and are at least partially confined between the coil segment 320 and the elastic sleeve 200. The two interference segments are arranged in a crisscross pattern. The colloid 400 is filled in the annular groove 140 and at least covers the side of the filament 300 facing away from the elastic sleeve 200.

[0062] In the technical solution provided by this invention, the annular groove 140 serves two purposes: firstly, it provides a precise operating space for the winding process of the thread 300; secondly, it accommodates the wound thread 300. The annular groove 140 provides sufficient space to accommodate the thread 300, preventing it from protruding excessively from the outer periphery of the insertion body 100. It also helps to limit the winding of the thread 300, preventing it from loosening relative to the elastic sleeve 200 after winding, thus avoiding an increase in the size of the binding point. Furthermore, since the two interference segments are clamped and limited between the coil segment 320 and the elastic sleeve 200, combined with the elastic deformation of the elastic sleeve 200 under force, a sufficiently strong mutual interference limit can be formed between the interference segments, the elastic sleeve 200, and the coil segment 320. This can replace the knot and achieve the purpose of tightly binding the elastic sleeve 200 within the annular groove 140. This application avoids the presence of knots, making the surface of the thread 300 facing away from the elastic sleeve 200 relatively flat without excessive protrusions. This helps to minimize the size of the tying point, thereby allowing the overall size design of the assembled insertion body 100 to be unconstrained by the size of the tying point. Ultimately, this helps to increase and enrich the application scenarios of reusable endoscopes and improve their practicality.

[0063] It is understood that the insertion body 100 generally extends longitudinally. For ease of understanding, in the following embodiments, the longitudinal extension direction of the insertion body 100 is taken as the front-to-back direction for illustration. Furthermore, the rear end of the insertion body 100 is connected to the operating body in the operating assembly. During the surgery, the front end of the insertion body 100 is inserted into the patient's body first.

[0064] The headstock 110 is located at the foremost end of the insertion body 100. The headstock 110 may include a mounting base and an imaging device and an illumination device disposed on the mounting base. The mounting base is generally block-shaped and primarily made of rigid material to provide sufficient structural strength for the mounting of the imaging device and the illumination device. The type of imaging device is not limited; it can be any suitable imaging product, such as a CMOS (Complementary Metal Oxide Semiconductor) imaging sensor that can directly capture images of the human body. Alternatively, the imaging device may be an optical fiber electrically connected to an external imaging sensor. The type of illumination device is not limited; it can be any suitable illumination product, such as an LED lamp body.

[0065] The connecting tube 130 is located at the rear end of the insertion body 100. The length of the connecting tube 130 is not limited; it may be formed only at the connection point between the insertion body 100 and the operating body, or it may extend forward to the desired length outside this connection point. The connecting tube 130 is generally made of a flexible material, and for example, it may be a corrugated tube.

[0066] The curved tube 120 is connected between the connecting tube 130 and the head end seat 110. It can be understood that the curved tube 120 is a tube mainly made of flexible material, or further made of elastic material, whose at least some sections can produce bending deformation in a relative direction when subjected to lateral external force, thereby making the orientation of the insertion body 100 at its front end adjustable.

[0067] The bending adjustment of the curved tube 120 can generally be achieved by a traction mechanism. The traction mechanism may include a traction element and a winding device. The traction element is generally a rope or line extending in the front-back direction. Its front end connects to the side of the part of the curved tube 120 that needs to be bent, and its rear end extends rearward into the inner cavity of the operating body, connecting to the winding device located on the operating body. The winding device can wind up and release the traction element, thereby enabling the bending and resetting adjustment of the bent portion of the curved tube 120.

[0068] Furthermore, the bending pipe body 120 may include an active bending pipe section 121 and a passive bending pipe section 122. The active bending pipe section 121 is generally connected to the front side of the passive bending pipe section 122, and the aforementioned traction mechanism is connected to the active bending pipe section 121, so that the active bending pipe section 121 can be directly driven by the traction mechanism to perform active bending activities, while the passive bending pipe section 122 can be driven by the active bending pipe section 121 to perform adaptive bending activities. Generally, the active bending pipe section 121 can be constructed by sequentially connecting multiple sections of a snake-bone structure; the passive bending pipe section 122 is, for example, constructed from a braided flexible hose.

[0069] Based on the above, the annular groove 140 can be provided at any one or both ends of the curved tube 120. Generally, one annular groove 140 is provided at each of the front and rear ends of the curved tube 120.

[0070] In one embodiment, the annular groove 140 can be directly formed on the curved tube 120 and is sufficiently close to the head end seat 110 or the connecting tube 130 at the end where it is located.

[0071] In one embodiment, the annular groove 140 may be formed at the connection between the curved tube 120 and the head end seat 110, that is, partially formed on the curved tube 120 and the remaining portion formed on the head end seat 110. When the curved tube 120 and the head end seat 110 are assembled, they together define the limiting groove. And / or, the annular groove 140 may be formed at the connection between the curved tube 120 and the connecting tube 130, that is, partially formed on the curved tube 120 and the remaining portion formed on the connecting tube 130. When the curved tube 120 and the connecting tube 130 are assembled, they together define the limiting groove.

[0072] In one embodiment, the annular groove 140 is directly formed on the head end seat 110 and located near the curved tube 120. And / or, the annular groove 140 is directly formed on the connecting tube 130 and located near the curved tube 120. It is understood that the mounting base in the head end seat 110 and the connecting tube 130 are generally made of rigid materials. By forming the annular groove 140 on the head end seat 110 and the connecting tube 130, the structural characteristics of the head end seat 110 and the connecting tube 130 can be utilized to make the limiting groove easier to form, and to improve the limiting and containing effect of the limiting groove on the wire 300.

[0073] It should be noted that the aforementioned annular groove 140 can be an additional groove structure, or it can be an improvement on the existing structure of the insertion body 100, for example, directly using the variable diameter section formed by the insertion body 100 at a suitable position to form a groove structure.

[0074] Furthermore, the flexible sleeve 200 is fitted around the entire outer periphery of the curved tube 120 to provide comprehensive protection for the entire curved tube 120. To meet the requirements of the reusable endoscope for cleaning, disinfection, and sterilization, the flexible sleeve 200 can be made of fluororubber. When the annular groove 140 is located outside the curved tube 120, i.e., on the tip end cap 110 and / or the connecting tube 130, the flexible sleeve 200 is configured to extend towards the tip end cap 110 and / or the connecting tube 130 to completely cover the annular groove 140.

[0075] The annular groove 140 is arranged in a ring shape extending along the circumference of the insertion body 100. That is, the groove length direction of the annular groove 140 corresponds to the circumference of the insertion body 100; the groove width direction of the annular groove 140 corresponds to the front-back direction of the insertion body 100; and the groove depth direction of the annular groove 140 corresponds to the transverse direction of the insertion body 100 (that is, the radial direction when the transverse cross-sectional shape of the insertion body 100 is circular).

[0076] Specifically, the wire 300 has two free ends, and two interference segments correspond to the segments connecting the two free ends of the wire 300. Between the two interference segments is a coil segment 320, which is wound along the length of the annular groove 140 for a predetermined number of turns, such as 6-8 turns. The two interference segments clamp and limit each other between the coil segment 320 and the elastic sleeve 200, respectively, thus mutually restricting their relative displacement and achieving the interference purpose. By setting the two interference segments in a crisscrossing arrangement, the mutual limiting effect between the two interference segments along the length of the annular groove 140 is further enhanced.

[0077] It should be noted that each interference segment is not limited to the line segment clamped and limited between the coil segment 320 and the elastic sleeve 200 (hereinafter referred to as the first line segment for ease of understanding), but may also include line segments exposed outside the coil segment 320 and the elastic sleeve 200 (hereinafter referred to as the second line segment for ease of understanding). After the coil segment 320 has been wound into a complete loop several times, the remaining line segments that do not form a complete loop and connect the two free ends can all constitute interference segments.

[0078] Therefore, the point where the two interference segments intersect can be between the coil segment 320 and the elastic sleeve 200, or it can be outside the coil segment 320 and the elastic sleeve 200. For example, as shown in Figure 3, the line segments at the connection between the first line segments of the two interference segments and the coil segment 320 constitute their respective second line segments. The two interference segments are the first interference segment 311 and the second interference segment 331. The two first line segments are approximately parallel between the coil segment 320 and the elastic sleeve 200, wherein the free end A of the first line segment of the second interference segment 331 intersects with the second line segment B of the first interference segment 311 outside the coil segment 320 and the elastic sleeve 200, and the free end A of the first line segment is pressed between the second line segment B and the elastic sleeve 200 to prevent the free end A of the first line segment from slipping off.

[0079] Next, in the width direction (i.e., the front-to-back direction) of the annular groove 140, the coil segment 320 is wound in multiple turns within the annular groove 140. In the depth direction of the annular groove 140, the coil segment 320 can be arranged in a single layer or stacked in at least two layers. However, to minimize the size of the winding area of ​​the wire 300, in this embodiment, the wire 300 may be arranged in a single layer within the annular groove 140.

[0080] And / or in one embodiment, the dimension of the thread 300 in the groove depth direction of the annular groove 140 is not greater than the groove depth of the annular groove 140. In this way, on the one hand, the thread 300 can be completely contained within the annular groove 140 without exceeding the annular groove 140, that is, without additionally increasing the size of the thread 300 winding area; on the other hand, sufficient space can be reserved within the annular groove 140 for the adhesive 400 to fill, which helps the adhesive 400 to form a sufficient layer thickness and achieve the desired bonding effect.

[0081] In one embodiment, the dimension of the thread 300 in the width direction of the annular groove 140 is adapted to the width of the annular groove 140. That is, the dimension of the thread 300 in the width direction of the annular groove 140 is approximately the same as the width of the annular groove 140. This helps to clamp and limit the thread 300 using the two side walls of the annular groove 140 in the width direction, preventing the thread 300 from loosening. On the other hand, it allows the thread 300 to cover the bottom wall of the annular groove 140 as much as possible. In this way, the thread 300 can play a sealing role and improve the bonding strength. The sealing role also seals the elastic sleeve 200, preventing the adhesive 400 from seeping into the interior of the elastic sleeve 200 when filling it, thus affecting the bending function of the bent tube 120. Increasing the bonding strength means that the filament 300 can act as a bonding medium to separate the colloid 400 and the elastic sleeve 200, preventing the colloid 400 from bonding directly with the elastic sleeve 200, which would weaken the bonding strength of the colloid 400 due to the self-lubricating properties of the fluororubber.

[0082] And / or in one embodiment, the outer surface of the colloid 400 is not lower than the opening of the annular groove 140. In this way, after the colloid 400 is cured, it will not increase the size at its location, thus avoiding causing the overall size of the insertion body 100 to be too large.

[0083] Furthermore, referring to Figures 4 to 7, the present invention also provides a method for assembling an insertion component. The insertion component may be, but is not limited to, the insertion components described in the various embodiments above.

[0084] Specifically, referring to Figures 4 and 6, the first embodiment of the assembly method for the insertion component provided by the present invention specifically includes:

[0085] Step S100: An annular groove 140 is formed at at least one end of the bent tube 120 along its circumference;

[0086] In this embodiment, as described above, the annular groove 140 can be specially formed; or the annular groove 140 can be directly defined using the existing groove structure of the insertion body 100. After the annular groove 140 is formed, it can be processed, for example, by trimming to remove sharp protrusions at corners to avoid puncturing the elastic sleeve 200. Alternatively, cleaning can be performed to remove residual impurities within the annular groove 140.

[0087] Step S200: Fit an elastic sleeve 200 onto the outer periphery of the curved tube body 120 and cover the annular groove 140;

[0088] In this embodiment, the flexible sleeve 200 is fitted around the outer periphery of the curved tube 120. When the annular groove 140 is formed at the curved tube 120, the length of the flexible sleeve 200 can be equivalent to the length of the curved tube 120 to cover the annular groove 140. When the annular groove 140 is at least partially formed outside the curved tube 120, i.e., at the head end seat 110 and / or the connecting tube 130, the length of the flexible sleeve 200 is longer than the length of the curved tube 120.

[0089] Of course, in this step, the length of the elastic tube can be set to the length required when the elastic tube sleeve 200 bends and just attaches to the entire inner wall of the annular groove 140 when the silk thread 300 tightly binds the elastic tube sleeve 200.

[0090] Alternatively, in one embodiment, the length of the elastic tube can be set such that when the thread 300 tightly binds the elastic sleeve 200, after the elastic sleeve 200 is bent and attached to the entire inner wall of the annular groove 140, a certain length is still reserved at one end of the annular groove 140 that is far apart from the others (for ease of understanding, this section of the elastic sleeve 200 is defined as the extension section 210 below). In this way, the setting of the extension section 210 reduces the length requirement of the elastic tube during the assembly process and can moderately compensate for a certain assembly error, ensuring that when the assembly is completed, the elastic sleeve 200 is sufficient to cover the entire inner wall of the annular groove 140.

[0091] Step S300: Extend a wire 300 from the outside of the annular groove 140 along the positive direction of the groove width into the annular groove 140 to obtain the starting line segment 310;

[0092] In this embodiment, it should be noted that the annular groove 140 generally has a positive and a negative groove width direction that are arranged in opposite directions along one groove width direction. That is, when the insertion body 100 extends in the front-rear direction as described above, and the annular groove 140 surrounds the insertion body 100 circumferentially, the positive groove width direction of the annular groove 140 in a certain groove width direction can be the rearward direction, and the negative groove width direction corresponds to the frontward direction. Of course, in other embodiments, the positive groove width direction can also be the frontward direction, and the negative groove width direction corresponds to the rearward direction.

[0093] In a specific operation, a wire 300 is selected, which has a diameter of, for example, 0.08~0.1mm and a width of 1.0~1.2mm. The initial segment 310 is drawn from the front outer side of the annular groove 140 backwards into the annular groove 140, as close as possible to the rear wall of the annular groove 140 (or appropriately extends backwards beyond the rear wall of the annular groove 140). The initial segment 310 is at least longer than the length of the first interference segment 311 described above.

[0094] Step S400: The remaining wire 300 is wound sequentially along the groove width in the opposite direction on the side of the starting segment opposite to the elastic sleeve 200 until the preset number of turns is reached to obtain the coil segment 320.

[0095] In this embodiment, the remaining wire 300 is wound along the length of the annular groove 140, with each layer sequentially wound from the rear wall of the annular groove 140 to the front wall (when the layers are relatively loose, they can extend forward beyond the front wall of the annular groove 140 as appropriate). The number of layers in the coil segment 320 is not limited; for example, it can be 6-8 turns, ensuring that after the wire 300 is tightened, the front-to-back dimension of the coil segment 320 is approximately the same as the width of the annular groove 140.

[0096] Step S500: Insert the remaining thread 300 along the groove width into the space between the coil segment 320 and the elastic sleeve 200, and extend it beyond the annular groove 140 after crossing the starting thread segment 310 to obtain the ending thread segment 330.

[0097] In this embodiment, the remaining thread 300 is initially located in front of the coil segment 320:

[0098] In one application, the remaining thread 300 can be bent directly backward and inserted between the coil segment 320 and the elastic sleeve 200. At this time, the termination segment 330 and the starting segment 310 can cross between the coil segment 320 and the elastic sleeve 200. For example, by adjusting the termination segment 330 to be tilted relative to the starting segment 310, the two first segments mentioned above can be formed.

[0099] Or, in one application, step S500 includes:

[0100] Step S510: Continue to wind the remaining wire groove around the circumference of the insertion body 100 until it passes the starting line segment 310, then bend it in the positive direction of the groove width and insert it between the coil segment 320 and the elastic sleeve 200, and extend it to the outside of the annular groove 140 to obtain the termination line segment 330.

[0101] At this point, the remaining thread 300 continues to be wound around the circumference of the inserted body 100 until it passes through the part of the starting segment 310 to form the second segment. The second segment of the termination segment 330 and the starting segment 310 intersect in advance outside the coil segment 320 and the elastic sleeve 200, so that the first segment of the termination segment 330 and the first segment of the starting segment 310 can be approximately parallel between the coil segment 320 and the elastic sleeve 200.

[0102] It should be noted that the relative positional relationship between the starting segment 310 and the ending segment 330 is only used to indicate the state of the thread 300 when step S500 is executed, and does not constitute a limitation on the state of the thread 300 after assembly. In fact, after step S600 is executed, due to the forces applied to the starting segment 310 and the ending segment 330 respectively, their intersection position, the division state of their respective first and second segments, etc., will all show certain differences.

[0103] Step S600: Tighten the starting line segment 310 and the ending line segment 330 to drive the coil segment 320 to tightly bind the elastic sleeve 200, and then cut the line segments of the starting line segment 310 and the ending line segment 330 that extend beyond the annular groove 140 to obtain two interference segments.

[0104] In this embodiment, since the starting segment 310 and the ending segment 330 each have a certain number of segments reserved outside the annular groove 140, it is convenient for the operator to grasp the starting segment 310 and the ending segment 330, and pull the starting segment 310 forward and the ending segment 330 backward respectively, so that the starting segment 310 and the ending segment 330 move away from each other and drive the coil segment 320 to gradually tighten. The coil segment 320 can tightly cover the outside of the elastic sleeve 200, thereby achieving the purpose of limiting and fixing the elastic sleeve 200 within the annular groove 140.

[0105] Then, the portion of the starting line segment 310 located within the annular groove 140 constitutes the required first interference segment 311, and the portion located outside the annular groove 140 can be cut off; the portion of the ending line segment 330 located within the annular groove 140 constitutes the required second interference segment 331, and the portion located outside the annular groove 140 can be cut off.

[0106] It should be noted that, when, as in step S200 above, the elastic sleeve 200 has an extension section 210 reserved outside the annular groove 140, after executing step S600, the following is also included:

[0107] Step S700: Cut off the portion of the elastic sleeve 200 that extends beyond the annular groove 140.

[0108] In this step, the portion of the elastic sleeve 200 that extends beyond the annular groove 140, i.e., the aforementioned extended tube section 210, is cut off, so that the elastic sleeve 200, under the tight binding effect of the silk thread 300, fits exactly against the inner wall of the annular groove 140.

[0109] Step S800: Fill the annular groove 140 with colloid 400 and cure it.

[0110] In this embodiment, after the above-mentioned wire-tying operation is completed, the annular groove 140 can be filled with adhesive 400. Adhesive 400 can specifically be epoxy resin. Adhesive 400 can enhance the binding effect of the wire 300 on the elastic sleeve 200, and can also prevent the wire 300 from loosening to a certain extent. After the adhesive 400 is filled into the annular groove 140, it can be cured under any suitable conditions, completing the assembly of the entire insertion body 100.

[0111] Furthermore, referring to Figures 5 and 7, in the second embodiment of the assembly method for the insertion component provided by the present invention, the specific components include:

[0112] Step A100: An annular groove 140 is formed at at least one end of the bent tube 120 along its circumference;

[0113] Step A200: Fit an elastic sleeve 200 onto the outer periphery of the curved tube body 120 and cover the annular groove 140;

[0114] Step A300: Extend a wire 300 from the outside of the annular groove 140 along the positive direction of the groove width into the annular groove 140 to obtain the starting line segment 310;

[0115] Step A400: Place an auxiliary tube 500 along the width of the annular groove 140 on the side of the starting segment 310;

[0116] Step A500: The remaining wire 300 is wound in reverse along the groove width on the side of the starting segment and the auxiliary tube 500 opposite to the elastic sleeve 200 until the preset number of turns is reached to obtain the coil segment 320.

[0117] Step A600: Continue to wind the remaining groove around the circumference of the insertion body 100 until it passes the starting line segment 310, then bend it along the positive direction of the groove width and pass it through the auxiliary tube 500, and extend it to the outside of the annular groove 140 to obtain the termination line segment 330.

[0118] Step A700: Remove the auxiliary tube 500;

[0119] Step A800: Tighten the starting line segment 310 and the ending line segment 330 to drive the coil segment 320 to tightly bind the elastic sleeve 200, and then cut the line segments of the starting line segment 310 and the ending line segment 330 that extend beyond the annular groove 140 to obtain two interference segments;

[0120] Step A900: Fill the annular groove 140 with colloid 400 and cure it.

[0121] It should be noted that steps A100 to A300 are the same as steps S100 to S300 described above; steps A800 to A900 are the same as steps S600 to S800 described above, and can be referred to the above description. Furthermore, steps S510 and S700 described above can also be applied to this embodiment according to actual needs.

[0122] In step A400 of this embodiment, the order of operations between steps A400 and A300 is not limited; step A300 can be executed first, followed by step A400, or vice versa. In step A400, the starting line segment 310 and the auxiliary tube 500 can be approximately parallel. When the inner diameter of the auxiliary tube 500 is large, step A400 can be executed first, followed by step A300, and the starting line segment 310 can also be inserted into the auxiliary tube 500. However, generally, in this embodiment, the starting line segment 310 is set not to be inserted into the auxiliary tube 500, but can extend along the outer surface of the auxiliary tube 500, so that the outer surface of the auxiliary tube 500 forms a certain guiding or supporting effect on the starting line segment 310; or a certain gap can be reserved between the starting line segment 310 and the outer surface of the auxiliary tube 500.

[0123] In step A500 of this embodiment, the coil segment 320 is not only wound around the outside of the starting segment 310, but also around the outside of the auxiliary tube 500. At this time:

[0124] The auxiliary tube 500 can be made of a rigid material, and further, the outer surface of the auxiliary tube 500 is set to a relatively smooth structure without sharp protrusions to avoid damage to the wire 300 during the winding process, and also to avoid mutual interference between the auxiliary tube 500 and the coil segment 320 when the auxiliary tube 500 is removed.

[0125] Alternatively, the auxiliary tube 500 can also be made of a flexible material. In this case, when the remaining thread 300 is wound around the outside of the starting segment 310 and the auxiliary tube 500, it makes flexible contact with the outer wall of the auxiliary tube 500 without damaging the thread 300.

[0126] Furthermore, during step A500, the winding force of the coil segment 320 can be appropriately increased, that is, the inner diameter of the coil segment 320 can be appropriately tightened, so that the wire 300 slightly squeezes the auxiliary tube 500, and the auxiliary tube 500 bends and deforms at least at the annular groove 140. At this time, the auxiliary tube 500 is subjected to force and becomes U-shaped or V-shaped, forming a concave structure at the annular groove 140. The concave structure can, on the one hand, provide position guidance for the continued winding of the wire 300, so that the coil segment 320 is basically aligned with the annular groove 140 and will not deviate excessively; on the other hand, through deformation, it can increase the interference between the auxiliary tube 500 and the wire 300 of the coil segment 320, and prevent the coil segment 320 from loosening.

[0127] Furthermore, the compressive force exerted by the thread 300 on the auxiliary tube 500 is set to be less than the force required for the auxiliary tube 500 to generate maximum deformation. This ensures that the auxiliary tube 500 will not deform excessively, causing it to be completely pressed against the outside of the elastic sleeve 200 in step A500, thus affecting the subsequent insertion of the termination line segment 330 in step A600 and the smooth removal of the auxiliary tube 500 in step A700.

[0128] In step A600 of this embodiment, the termination line segment 330 is inserted into the auxiliary tube 500. The insertion of the termination line segment 330 is facilitated by the internal space of the auxiliary tube 500 itself.

[0129] In step A700 of this embodiment, when it is ensured that the free end of the termination segment 330 is outside the annular groove 140, the auxiliary tube 500 is withdrawn in the same direction. It should be noted that the length of the auxiliary tube 500 is set to be no less than the width of the annular groove 140. This ensures that when step A700 is performed, at least a portion of the auxiliary tube 500 is exposed outside the annular groove 140, allowing the operator to manually grasp it and efficiently withdraw the auxiliary tube 500.

[0130] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An insertion component, characterized in that, include: The insertion body includes a head end seat, a curved tube, and a connecting tube connected in sequence. The curved tube is adjustable and bendable. The insertion body has an annular groove around its circumference at at least one end or adjacent to the curved tube. An elastic sleeve is fitted around the outer periphery of the curved tube and extends at least to cover the annular groove; A wire is wound around the side of the elastic sleeve opposite to the annular groove. The wire includes a coil segment wound multiple turns within the annular groove and two interference segments connected to both ends of the coil segment. Both interference segments extend along the width of the annular groove and are at least partially confined between the coil segment and the elastic sleeve. The two interference segments are arranged in a crisscrossing manner. The colloid is filled in the annular groove and at least covers the side of the filament facing away from the elastic sleeve.

2. The insertion component as claimed in claim 1, characterized in that, The annular groove is formed at a position on the head end seat adjacent to the curved tube body; and / or The annular groove is formed at a position on the connecting pipe body adjacent to the curved pipe body.

3. The insertion component as claimed in claim 1, characterized in that, The threads are arranged in a single layer within the annular groove; and / or, The dimension of the wire in the groove depth direction of the annular groove is not greater than the groove depth of the annular groove; And / or, The dimension of the thread in the width direction of the annular groove is adapted to the width of the annular groove; and / or, The outer surface of the colloid is not lower than the opening of the annular groove.

4. An endoscope, characterized in that, It includes an operating component and an insertion component as described in any one of claims 1 to 3.

5. A method for assembling an insertion component as described in any one of claims 1 to 3, characterized in that, include: An annular groove is formed at at least one end of the curved tube along its circumference. A flexible tube is fitted around the outer periphery of the curved tube and covers the annular groove. A starting line segment is obtained by extending a thread from the outside of the annular groove along the positive direction of the groove width into the annular groove. The remaining wire is wound sequentially along the groove width in the opposite direction on the side of the starting segment opposite to the elastic sleeve until the preset number of turns is reached to obtain a coil segment; Insert the remaining thread along the groove width into the space between the coil segment and the elastic sleeve, and extend it beyond the annular groove after intersecting with the starting segment to obtain the ending segment; After tightening the starting line segment and the ending line segment to make the coil segment tightly bind the elastic sleeve, the line segments of the starting line segment and the ending line segment that extend beyond the annular groove are cut to obtain two interference segments; The colloid is filled into the annular groove and cured.

6. The assembly method of the insertion component as described in claim 5, characterized in that, In the step of fitting an elastic sleeve around the outer periphery of the curved tube and covering the annular groove, the length of the elastic sleeve extends beyond the annular groove.

7. The assembly method of the insertion component as described in claim 6, characterized in that, After tightening the starting segment and the ending segment to tightly bind the coil segment to the elastic sleeve, and then cutting the segments of the starting segment and the ending segment that extend beyond the annular groove to obtain two interference segments, the method further includes: Cut off the portion of the elastic sleeve that extends beyond the annular groove.

8. The assembly method of the insertion component as described in claim 5, characterized in that, The step of inserting the remaining wire along the groove width into the space between the coil segment and the elastic sleeve, and extending it beyond the annular groove after intersecting with the starting wire segment to obtain the termination wire segment includes: The remaining groove is continued to be wound around the circumference of the insertion body until it passes the starting line segment. Then, it is bent along the positive direction of the groove width and inserted between the coil segment and the elastic sleeve, extending to the outside of the annular groove to obtain the termination line segment.

9. A method for assembling an insertion component as described in any one of claims 1 to 3, characterized in that, include: An annular groove is formed at at least one end of the curved tube along its circumference. A flexible tube is fitted around the outer periphery of the curved tube and covers the annular groove. A starting line segment is obtained by extending a thread from the outside of the annular groove along the positive direction of the groove width into the annular groove. An auxiliary tube is placed beside the starting line segment, extending along the width of the annular groove. The remaining wire is wound in reverse along the groove width onto the starting segment and the side of the auxiliary tube opposite to the elastic sleeve until the preset number of turns is reached to obtain the coil segment; The remaining groove continues to be wound around the circumference of the inserted body until it passes the starting line segment, then bends along the groove width in the positive direction and passes through the auxiliary tube, extending to the outside of the annular groove to obtain the termination line segment. Remove the auxiliary tube; After tightening the starting line segment and the ending line segment to make the coil segment tightly bind the elastic sleeve, the line segments of the starting line segment and the ending line segment that extend beyond the annular groove are cut to obtain two interference segments; The colloid is filled into the annular groove and cured.

10. The assembly method of the insertion component as described in claim 9, characterized in that, The length of the auxiliary tube is not less than the width of the annular groove.

11. The assembly method of the insertion component as described in claim 9, characterized in that, The auxiliary tube is made of a flexible material.

12. The assembly method of the insertion component as described in claim 11, characterized in that, In the step of sequentially winding the remaining threads along the groove width in the opposite direction to the starting segment and the side of the auxiliary tube facing away from the elastic sleeve, the threads squeeze the auxiliary tube, causing the auxiliary tube to bend and deform at least at the annular groove.

13. The assembly method of the insertion component as described in claim 12, characterized in that, The compressive force exerted by the filament on the auxiliary tube is set to be less than the force required for the auxiliary tube to produce maximum deformation.

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