Front end assembly, insertion portion, and endoscope

Abstract

The present application discloses a front-end component, an insertion portion and an endoscope, and relates to the field of medical device technology. The front-end component is used for an endoscope, and the front-end component includes a front-end seat, a camera, a light source, a circuit board and an instrument tube, wherein the camera, the light source and the circuit board are all mounted on the front-end seat, and the camera and the light source are both connected to the circuit board; the distal end of the instrument tube is fixedly mounted on the front-end seat, and the front-end component is configured so that during the process of its assembly with the active bending section of the endoscope, the instrument tube can apply a traction force to the front-end seat, and the traction force is used to pull the front-end seat to be pre-tightened against the distal end of the active bending section. The above scheme can simplify the assembly process between the front-end component and the active bending section.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a front end assembly, an insertion portion and an endoscope. Background Art

[0002] With the continuous development of medical technology, endoscopes have been widely used in the diagnosis and treatment of diseases. In the process of using an endoscope, the direction of the front end can be adjusted by bending the insertion part to obtain image information of the target part.

[0003] In the related art, the front end assembly of the insertion part and the distal end of the active bending section are fixedly assembled by means of clamping, bonding, welding, etc., so that the front end assembly can adjust its direction with the bending action of the active bending section. However, the above fixing method is relatively cumbersome and has the disadvantage of low assembly efficiency. Summary of the invention

[0004] The embodiments of the present application provide a front end component, an insertion portion, and an endoscope, which can simplify the assembly process between the front end component and the active bending section.

[0005] In order to solve the above problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a front end assembly for an endoscope, the front end assembly comprising a front end seat, a camera, a light source, a circuit board and an instrument tube, the camera, the light source and the circuit board are all mounted on the front end seat, and the camera and the light source are both connected to the circuit board;

[0007] The distal end of the instrument tube is fixedly mounted on the front end seat, and the front end assembly is configured so that during the process of its assembly with the active bending section of the endoscope, the instrument tube can apply traction to the front end seat, and the traction force is used to pull the front end seat to pre-tighten against the distal end of the active bending section.

[0008] In a second aspect, an embodiment of the present application provides an insertion portion, comprising an active bending section and a front end assembly as described in the first aspect of the embodiment of the present application, wherein the front end seat of the front end assembly is pre-tightened against the distal end of the active bending section via traction by the instrument tube.

[0009] In a third aspect, an embodiment of the present application provides an endoscope, comprising a handle and the insertion portion described in the second aspect of the embodiment of the present application, wherein the handle is connected to the insertion portion.

[0010] The technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

[0011] In the front end assembly, insertion portion and endoscope disclosed in the embodiments of the present application, the distal end of the instrument tube is fixedly mounted on the front end seat, and the instrument tube is configured to apply traction force to the front end seat, so that the front end seat can be pre-tightened against the distal end of the active bending section, thereby achieving assembly of the front end assembly and the active bending section.

[0012] Based on this structural layout, during the assembly process of the insertion part, the assembly of the front end component and the active bending section can be completed by only a simple action of pulling the instrument tube. Compared with the related technology, the technical solution of the embodiment of the present application does not require additional assembly structure processing on the front end seat and the distal end of the active bending section, thereby ensuring the structural strength of the front end seat and the distal end of the active bending section, while also eliminating the connection procedures such as bonding, clamping, and welding, which can obviously simplify the assembly process, improve assembly efficiency, and reduce assembly costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0014] In the attached picture:

[0015] Figure 1 This is a schematic structural diagram of the insertion portion disclosed in the first embodiment of the present application;

[0016] Figure 2 This is a schematic structural diagram of the front end seat of the hidden part of the insertion portion disclosed in the first embodiment of the present application;

[0017] Figure 3 It is a structural schematic diagram of the front end seat of the hidden part of the insertion part disclosed in the second embodiment of the present application and a partial enlarged diagram of the A portion thereof;

[0018] Figure 4 This is a schematic structural diagram of a front end seat of a hidden portion of an insertion portion disclosed in a third embodiment of the present application;

[0019] Figure 5 It is a structural schematic diagram of the front end seat of the hidden part of the insertion part disclosed in the fourth embodiment of the present application and a partial enlarged diagram of the B portion thereof;

[0020] Figure 6 It is a structural schematic diagram of the front end seat of the hidden part of the insertion part disclosed in the fifth embodiment of the present application and a partial enlarged diagram of the C portion thereof;

[0021] Figure 7 It is a schematic structural diagram of the front end seat of the hidden part of the insertion portion disclosed in the sixth embodiment of the present application and a partial enlarged diagram of point D therein.

[0022] Description of reference numerals:

[0023] 100-front-end components,

[0024] 110-front end seat, 111-main body, 111a-sleeve portion, 111a1-first abutting portion, 111a2-first limiting recess, 112-partition plate, 112a-inner bottom surface, 110a-second limiting recess,

[0025] 120-camera, 130-light source, 140-circuit board, 150-instrument tube,

[0026] 200-active bending section, 210-second abutment portion, 220-first limiting protrusion, 221-guiding slope, 230-second limiting protrusion, 201-distal snake bone, 202-connecting snake bone,

[0027] 300-elastic part, R-traction rope. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0029] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0030] The technical solutions disclosed in various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0031] In the relevant endoscope technology, the insertion part is a component that needs to enter the human body cavity. It realizes functions such as shooting and lighting at the target position through the front-end component, and realizes the bending action through the active bending section. The two important structures, the front-end component and the active bending section, need to be assembled as one during the production and processing. At present, the industry often realizes the fixed assembly of the front-end component and the active bending section through clamping, bonding, welding and other methods.

[0032] After research, the inventors found that the traditional assembly method between the front-end component and the active bending section has certain defects. For example, when the two are assembled by snap-fitting, it is necessary to process snap-fit ​​structures on the front-end component and the active bending section respectively, and then align the snap-fit ​​structures. However, the processing of the snap-fit ​​structure itself leads to an increase in processing costs, and the alignment process in the assembly process is also cumbersome, and there are problems with assembly efficiency. When bonding and welding are used, for more precise devices such as endoscopes, it is difficult to apply glue to the front-end component and the active bending section and to weld accurately, which also leads to low assembly efficiency. At the same time, the traditional assembly method also has the defect of high assembly cost.

[0033] In this regard, some embodiments of the present application provide a front end component for an endoscope.

[0034] See also Figure 1 to Figure 7 The front end assembly 100 disclosed in the embodiment of the present application includes a front end seat 110, a camera 120, a light source 130, a circuit board 140 and an instrument tube 150. The camera 120, the light source 130 and the circuit board 140 are all installed on the front end seat 110, and the camera 120 and the light source 130 are both connected to the circuit board 140.

[0035] Among them, the front end seat 110 is the basic structure of the front end assembly 100, which provides an installation basis for the camera 120, the light source 130, the circuit board 140 and the instrument tube 150, etc., and of course, it can also protect these structures. Specifically, the camera 120 can be arranged on one side of the front end face of the front end seat 110 to shoot the target part (such as a lesion) when the insertion part enters the human body cavity. The light source 130 is also arranged on one side of the front end face of the front end group, which can illuminate the area facing the front end assembly 100. The circuit board 140 can supply power to the camera 120 and the light source 130, and is also used to realize signal interaction. The instrument tube 150 is used to enter and exit the disposal instrument, and to aspirate tissue fluid.

[0036] At the same time, the distal end of the instrument tube 150 is fixedly mounted on the front end seat 110, and the front end assembly 100 is configured so that during its assembly with the active bending section 200 of the endoscope, the instrument tube 150 can apply a traction force F to the front end seat 110 (see the dotted arrows in the accompanying drawings), and the traction force F is used to pull the front end seat 110 to pre-tighten against the distal end of the active bending section 200.

[0037] It can be understood that since the instrument tube 150 is fixedly connected to the front end seat 110, the instrument tube 150 can transmit the force to the front end seat 110. In the embodiment of the present application, the instrument tube 150 is suitable for bearing the traction force F, and by transmitting the traction force F to the front end seat 110, during the assembly process of the front end assembly 100 and the active bending section 200, the distal ends of the front end seat 110 and the active bending section 200 are brought close to each other, and the proximal end side of the front end seat 110 is pulled to abut against the distal end of the active bending section 200. Of course, in the process of transmitting the traction force F to the front end seat 110, the traction force F may be lost, that is, the force on the front end seat 110 is less than the traction force F or is approximately the traction force F, but for the convenience of writing, the following description is still based on the front end seat 110 being subjected to the traction force F.

[0038] It should be noted that the traction force F that the instrument tube 150 of the embodiment of the present application is suitable for bearing can make the front end seat 110 pre-tighten and abut against the distal end of the active bending section 200, and specifically can achieve the effect of pre-tightening and fixing the proximal side of the front end seat 110 and the distal end of the active bending section 200, so that the two can withstand a certain external force at the joint without separation, that is, the traction force F makes the proximal side of the front end seat 110 and the distal end of the active bending section 200 have a certain connection reliability. Of course, the instrument tube 150 can be pre-tightened on its proximal side, so that the instrument tube 150 can maintain a relatively tensioned state and ensure that it can always pull the front end seat 110 to pre-tighten and abut against the distal end of the active bending section 200.

[0039] Based on the above analysis, it can be known that when the front end component 100 of the embodiment of the present application is assembled with the active bending section 200, when the instrument tube 150 is passed through the active bending section 200, the traction force F can be applied to the front end seat 110 by pulling the instrument tube 150, and the front end seat 110 can be pulled to be pre-tightened against the distal end of the active bending section 200. Of course, during the pulling process, the alignment of the front end seat 110 and the active bending section 200 can be adjusted in time.

[0040] Compared with the related art, the front end component 100 of the embodiment of the present application only needs to pull the instrument tube 150 to complete the assembly of the front end component 100 and the active bending section 200, without the need for additional assembly structure processing (such as processing and forming of the snap structure) at the far end of the front end seat 110 or the active bending section 200. This can optimize the strength of the corresponding structure and does not require bonding, welding and other connection processes. It can significantly simplify the assembly process, improve assembly efficiency and reduce assembly costs.

[0041] In the embodiment of the present application, the structures of the front-end assembly 100 can be processed and assembled in a variety of ways, such as Figure 2As shown, the front-end seat 110 includes a main body 111 and a partition 112. The partition 112 can isolate an installation space inside the main body 111. The camera 120, the light source 130, the circuit board 140 and the distal end of the instrument tube 150 can be arranged in the installation space. The main body 111, the partition 112, the camera 120, the light source 130, the circuit board 140 and the distal end of the instrument tube 150 are integrally formed by injecting glue into the installation space. In another embodiment, the front-end assembly 100 and the distal end of the instrument tube 150 can be processed and assembled by integral injection molding.

[0042] In the embodiment where the instrument tube 150 and the front end seat 110 are integrally injection molded, the instrument tube 150 and the front end seat 110 constitute an integral component. Compared with other fixing methods, there will be no connection gap between the two. This can greatly enhance the connection strength between the two and improve the connection reliability between the two.

[0043] In the embodiment of the present application, the instrument tube 150 needs to bear the traction force F and transmit the traction force F to the front end seat 110 through its distal end to pull the front end seat 110. Because the front end seat 110 and the instrument tube 150 are integrally injection molded, the strengthened connection strength between the two can better meet the force requirements of the instrument tube 150 pulling the front end seat 110, thereby ensuring that the instrument tube 150 can reliably transmit the traction force F to the front end seat 110 to avoid separation, so that the front end seat 110 can stably abut against the distal end of the active bending section 200. See Figure 1 to Figure 7 Some embodiments of the present application also provide an insertion portion, including an active bending section 200 and the front end assembly 100 mentioned in any of the aforementioned schemes, wherein the front end seat 110 of the front end assembly 100 is pre-tightened against the distal end of the active bending section 200 by being pulled by an instrument tube 150.

[0044] Among them, the active bending section 200 serves as the main body of the bending action of the insertion part. It can adopt a snake-bone structure or an integral cutting structure. The embodiments of the present application do not limit its type.

[0045] In the embodiment of the active bending section 200 as a serpentine structure, the front seat 110 is pre-tightened and abutted against the distal side of the distal serpentine 201; the active bending section 200 also includes a plurality of connecting serpentines 202 that are rotatably connected in sequence, and the connecting serpentine 202 at the front end is rotatably connected to the distal serpentine 201 and rotates with the distal serpentine 201. The traction rope R used to pull the active bending section 200 to achieve the bending action is passed through each serpentine, and can be fixedly connected to the front seat 110 (such as Figure 2 As shown), it can also be fixedly connected to the distal snake bone 201.

[0046] In the embodiment of the present application, the specific matching relationship between the front end seat 110 and the active bending section 200 is not limited. For example, the front end seat 110 can be pre-tightened and abutted against the distal end surface of the active bending section 200 through its proximal end surface.

[0047] like Figure 2 As shown, in some embodiments of the present application, the front end seat 110 and the distal end of the active bending section 200 are sleeved with each other.

[0048] It can be understood that the traction force applied by the instrument tube 150 pulling the front end seat 110 is a biasing force on the cross section of the insertion portion, which will cause a tendency for relative deflection and displacement between the front end seat 110 and the distal end of the active bending section 200; in this embodiment, the front end seat 110 and the distal end of the active bending section 200 are mutually nested, which means that the proximal end of the front end seat 110 can be nested on the outer periphery of the distal end of the active bending section 200, or the distal end of the active bending section 200 can be nested on the proximal end of the front end seat 110; the significance of the mutual nesting of the two is that they can achieve limited matching in the radial direction, thereby effectively preventing the front end seat 110 and the distal end of the active bending section 200 from being relatively deflected or displaced, so as to ensure that the front end seat 110 and the distal end of the active bending section 200 are aligned and connected, thereby improving the connection reliability between the two.

[0049] In order to improve the abutment reliability between the front end seat 110 and the distal end of the active bending section 200, in the embodiment where the front end seat 110 and the distal end of the active bending section 200 are mutually sleeved, an axial limiting structure may be provided on the proximal side of the front end seat 110 and the distal side of the active bending section 200. Specifically, the front end seat 110 includes a first abutment portion 111a1 provided on the proximal side thereof, and the active bending section 200 includes a second abutment portion 210 provided on the distal side thereof, and the front end seat 110 is pre-tightenedly abutted against the second abutment portion 210 of the active bending section 200 through the first abutment portion 111a1.

[0050] Specifically, when the proximal seat and the distal end of the active bending section 200 are mutually sleeved, the two are mutually limited in radial direction. At the same time, the first abutting portion 111a1 and the second abutting portion 210 can prevent the proximal seat and the active bending section 200 from excessively extending into each other, and avoid occupying too much installation space in the proximal seat or the active bending section 200, and in particular, can avoid directly pressing against the inner bottom surface 112a of the front end seat 110 (the axial bottom surface located in the sleeve portion 111a when the front end seat 110 includes the sleeve portion 111a), thereby preventing the relevant components placed in the front end seat 110 from being damaged by pressure. Wherein, when the front end seat 110 includes the partition 112, the inner bottom surface 112a can be the bottom surface of the partition 112.

[0051] In the embodiment of the present application, specific types of the first abutting portion 111 a 1 and the second abutting portion 210 are not limited.

[0052] like Figure 3 As shown, the first abutting portion 111a1 is a first step portion, and the second abutting portion 210 is a second step portion. Under this structural layout, the front end seat 110 and the active bending section 200 can achieve a matching relationship in which the front end seat 110 is pre-tightened and abutted against the far end of the active bending section 200 through the axial abutment of the first step portion and the second step portion, that is, the abutting surface of the front end seat 110 includes the step surface of the first step portion, and the abutting surface of the active bending section 200 includes the step surface of the second step portion. At the same time, the first step portion and the second step portion cooperate with each other to ensure that the front end seat 110 and the active bending section 200 have a mutually sleeved assembly relationship.

[0053] Among them, the first step portion can be arranged on the proximal outer circumference or inner surface of the front end seat 110, and the second step portion can be arranged on the distal inner surface or outer circumference of the active bending section 200. Of course, the positional relationship between the first step portion and the second step portion needs to be adaptable.

[0054] Or, if Figure 4 As shown, the first abutting portion 111a1 is a first abutting inclined surface, and the second abutting portion 210 is a second abutting inclined surface. Under this structural layout, the front end seat 110 and the active bending section 200 are axially abutted by the first abutting inclined surface and the second abutting inclined surface to achieve a matching relationship in which the front end seat 110 is pre-tightened and abutted against the far end of the active bending section 200, that is, the abutting surface of the front end seat 110 includes the first abutting inclined surface, and the abutting surface of the active bending section 200 includes the second abutting inclined surface. At the same time, the inclined surface characteristics of the first abutting inclined surface and the second abutting inclined surface can also ensure that the front end seat 110 and the active bending section 200 have a mutually sleeved assembly relationship.

[0055] It is worth pointing out that the first abutting bevel and the second abutting bevel can increase the contact area between the front end seat 110 and the active bending section 200, which can optimize the stability of the two at the joint, and optimize the distribution of the mutual squeezing force between the two at the joint (by reducing the pressure), thereby reducing the risk of mechanical damage. In addition, the abutting portion of the bevel type can play a guiding role, and is also conducive to the jointing of the front end seat 110 and the distal end of the active bending section 200.

[0056] As mentioned above, the first step portion and the second step portion constitute an axial limiting structure, and the first abutting inclined surface and the second abutting inclined surface constitute an axial limiting structure. Of course, in the embodiment where the abutment between the front end seat 110 and the active bending section 200 is achieved through the above-mentioned axial limiting structure, it is also possible to simultaneously combine the solution of pre-tightening abutment on the proximal surface of the front end seat 110, the inner bottom surface 112a of the front end seat 110 and / or the distal surface of the active bending section 200. In the case of multiple abutting surfaces, the stability and reliability of the fixed assembly of the front end seat 110 and the active bending section 200 achieved through pre-tightening abutment can be further improved.

[0057] Furthermore, if Figure 3 and Figure 4 As shown, the first abutting portion 111 a 1 is disposed along the circumference of the front end seat 110 , and the second abutting portion 210 is disposed along the circumference of the active bending section 200 .

[0058] It can be understood that under such a layout, the axial limiting structure combination composed of the first abutment portion 111a1 and the second abutment portion 210 forms a closed-loop limiting matching relationship on their respective main body 111 structures along the entire circumference, which can optimize the distribution uniformity of the circumferential pressure effect between the proximal end of the front end seat 110 and the distal end of the active bending section 200, thereby facilitating the improvement of the reliability and stability of the fixed assembly of the two through pre-tightening abutment.

[0059] like Figure 5 As shown, in some embodiments of the present application, in an embodiment where the distal ends of the front end seat 110 and the active bending section 200 are mutually socketed, one of the opposite sides of the front end seat 110 and the active bending section 200 is provided with a first limiting protrusion 220 and the other is provided with a first limiting recess 111a2, and the first limiting protrusion 220 and the first limiting recess 111a2 cooperate in the circumferential limiting position of the insertion portion.

[0060] It can be understood that the first limiting protrusion 220 and the first limiting recess 111a2 constitute a limiting cooperation structure in the circumferential direction of the insertion part. During the use of the insertion part of the embodiment of the present application, when the insertion part is subjected to an external force distributed along the circumferential direction, the first limiting protrusion 220 and the first limiting recess 111a2 can hinder the relative rotation between the front end seat 110 and the distal end of the active bending section 200 along the circumferential direction through mutual limiting cooperation, that is, it can prevent the front end seat 110 and the distal end of the active bending section 200 from twisting at the abutment joint, thereby improving the reliability and stability of the fixed assembly of the two through the pre-tightening abutment.

[0061] The embodiments of the present application do not limit the specific arrangement positions of the first limiting protrusion 220 and the first limiting recess 111a2. In the embodiment where the front end seat 110 and the active bending section 200 are respectively provided with the first step portion and the second step portion, the first limiting protrusion 220 and the first limiting recess 111a2 can be provided on the side surface included in the above-mentioned step structure, and in the embodiment where the front end seat 110 and the active bending section 200 are respectively provided with the first abutting inclined surface and the second abutting inclined surface, the first limiting protrusion 220 and the first limiting recess 111a2 can be provided on the above-mentioned abutting inclined surface.

[0062] Among them, Figure 5 As shown, the first limiting protrusion 220 is provided on the active bending section 200 , and the first limiting recess 111a2 is provided on the front end seat 110 ; of course, the first limiting protrusion 220 can also be provided on the front end seat 110 , and the first limiting recess 111a2 is correspondingly provided on the active bending section 200 .

[0063] like Figure 5 As shown, the first limiting recess 111a2 is an open structure, which is provided with a notch on a side suitable for docking with the first limiting protrusion 220. The notch can allow the first limiting protrusion 220 to slide into the first limiting recess 111a2, thereby avoiding interference between the first limiting protrusion 220 and the corresponding side surfaces of the far end of the front end seat 110 or the active bending section 200, so as to facilitate the pre-tightened abutment assembly between the far end of the front end seat 110 and the active bending section 200.

[0064] like Figure 5 As shown, the first limiting protrusion 220 has a guiding inclined surface 221 arranged at its butt end to facilitate sliding into the first limiting recess 111a2.

[0065] Regarding the first limiting recess 111a2, it can be a limiting groove (such as Figure 5 In the case where the first limiting depression 111a2 is a limiting groove, the first limiting protrusion 220 can be spaced apart from the groove bottom surface of the limiting groove to reduce wear between the two; or the first limiting protrusion 220 can be in contact with the groove bottom surface of the limiting groove to play an axial anti-slip function between the front end seat 110 and the distal end of the active bending section 200 through friction.

[0066] like Figure 2 and Figure 5 As shown, in some embodiments of the present application, the front end seat 110 includes a sleeve portion 111a arranged on a proximal side thereof and an inner bottom surface 112a arranged axially in the sleeve portion 111a, and the front end seat 110 is sleeved on the distal end of the active bending section 200 through the sleeve portion 111a, and the front end seat 110 is pre-tightened and abutted against the distal end of the active bending section 200 through the inner bottom surface 112a.

[0067] It should be understood that since the front end seat 110 and the distal end of the active bending section 200 are mutually socketed, the front end seat 110 may have a sleeve portion 111a arranged on the proximal side thereof. Under such a layout, the distal end of the active bending section 200 needs to extend into the sleeve portion 111a to achieve the pre-tightened abutment cooperation between the front end seat 110 and the distal end of the active bending section 200. In this embodiment, the inner bottom surface 112a can serve as the abutment surface for the pre-tightened abutment between the front end seat 110 and the distal end of the active bending section 200, and can avoid the related components (including the camera 120, the light source 130, the circuit board 140, etc.) installed inside the front end seat 110 from having an abutment relationship with the distal end of the active bending section 200, thereby preventing the related components from being damaged by pressure.

[0068] In combination with the manner in which the structures of the front end assembly 100 are assembled through an integral injection molding process, the inner bottom surface 112 a of the front end seat 110 may be an integrally injection molded injection plane.

[0069] like Figure 6 As shown, in some embodiments of the present application, the front end seat 110 has a second limiting protrusion 230 provided on its abutting surface, and the active bending section 200 includes a second positioning recess provided on its abutting surface, and the second limiting protrusion 230 cooperates with the second positioning recess in the circumferential or radial limit position of the insertion part.

[0070] It can be understood that during use of the insertion portion of the embodiment of the present application, when the insertion portion is subjected to an external force distributed along the circumferential direction, the first limiting protrusion 220 and the first limiting recess 111a2 can hinder the relative rotation between the front end seat 110 and the distal end of the active bending section 200 along the circumferential direction through mutual limiting cooperation, that is, it can prevent torsion at the abutment joint between the front end seat 110 and the distal end of the active bending section 200, thereby improving the reliability and stability of the fixed assembly of the two through the pre-tightening abutment.

[0071] At the same time, the second limiting protrusion 230 and the second limiting recess 110a provided on the corresponding abutting surface are arranged along the axial extension of the insertion part. The two can also play a limiting role in the radial direction of the insertion part, and can share the radial interaction force between the front end seat 110 and the distal end of the active bending section 200 when the limiting cooperation is carried out, thereby reducing the radial force on the relative sides of the front end seat 110 and the distal end of the active bending section 200 to avoid damage caused by stress concentration.

[0072] Among them, Figure 6 As shown, the second limiting protrusion 230 is provided on the active bending section 200 , and the second limiting recess 110 a is provided on the front end seat 110 ; of course, the second limiting protrusion 230 can also be provided on the front end seat 110 , and the second limiting recess 110 a is correspondingly provided on the active bending section 200 .

[0073] Regarding the second limiting recess 110a, it can be a limiting groove (such as Figure 6 As shown), it can also be a limiting hole.

[0074] In the scheme of pulling the front end group by the instrument tube 150 to pre-tighten it against the distal end of the active bending section 200, since the instrument tube 150 needs to be offset in the cross section of the insertion portion, the point of action of the traction force F provided by the instrument tube 150 is not applied on the central axis of the front end group, which will cause uneven force distribution between the front end seat 110 and the distal end of the active bending section 200, which can easily lead to relative deflection between the two and mechanical damage at the joint.

[0075] In this regard, in some embodiments of the present application, the insertion portion may further include an elastic member 300, and at least one of the opposing abutment surfaces of the front end seat 110 and the active bending section 200 is provided with the elastic member 300, and the elastic member 300 is located on the side of the front end seat 110 where the instrument tube 150 is offset. Figure 7 As shown, the elastic member 300 is disposed on the active bending section 200 . Of course, it can also be disposed on the front end seat 110 .

[0076] Under this structural layout, in the process of the instrument tube 150 pulling the front end seat 110, the side of the front end seat 110 where the instrument tube 150 is offset will first squeeze the elastic member 300. As the traction force F of the instrument tube 150 continues to increase, the elastic member 300 is compressed, and the elastic member 300 absorbs part of the traction force F received by the front end seat 110 on the offset side of the instrument tube 150 through elastic deformation to store energy. It can be seen that the elastic member 300 can consume part of the force received by the front end seat 110 on the offset side of the instrument tube 150, thereby alleviating the problem of uneven force distribution between the front end seat 110 and the distal end of the active bending section 200 to a certain extent, thereby reducing the relative deflection between the two and the mechanical damage at the joint.

[0077] At the same time, since the elastic member 300 is squeezed between the front end seat 110 and the distal end of the active bending section 200 to store energy, the elastic characteristics of the elastic member 300 enable it to apply a rebound force to the front end seat 110 or the distal end of the active bending section 200, which can further make the abutment between the front end seat 110 and the distal end of the active bending section 200 more stable.

[0078] The elastic member 300 may be an independent device such as a spring, or the elastic member 300 may be an integrally formed part of the mounting base component, for example, Figure 7 In the illustrated embodiment, the elastic member 300 is an elastic protrusion integrally formed at the distal end of the active bending section 200 , and a through deformation space is provided inside the elastic member 300 .

[0079] See also Figure 1 to Figure 7Some embodiments of the present application also provide an endoscope, including a handle and the insertion part mentioned in any of the aforementioned schemes. In this way, the endoscope has the beneficial effects of the aforementioned insertion part, which will not be repeated here.

[0080] Among them, the handle is connected to the insertion part. In a specific installation process, by pulling the instrument tube 150, a traction force F can be applied to the front end seat 110 to pull the front end seat 110 and pre-tighten it against the distal end of the active bending section 200. At the same time, the instrument tube 150 is extended and arranged in the insertion part, and its proximal end extends into the handle. In an embodiment of the present application, the proximal end of the instrument tube 150 can be pre-tightened and installed in the handle to make the instrument tube 150 in a relatively tensioned state, thereby ensuring that the front end seat 110 is always subjected to the traction force F and pre-tightened against the distal end of the active bending section 200.

[0081] Of course, it is worth mentioning that the instrument tube 150 of the endoscope is made of a flexible material, and even if a traction force F is applied to the front end seat 110 in the embodiment of the present application, it can still adapt to the bending movement of the insertion portion.

[0082] The endoscope in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose any specific restrictions on the type of the endoscope.

[0083] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0084] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A front end assembly for an endoscope, characterized in that: The front-end assembly includes a front-end seat, a camera, a light source, a circuit board and an instrument tube, wherein the camera, the light source and the circuit board are all mounted on the front-end seat, and the camera and the light source are both connected to the circuit board; The distal end of the instrument tube is fixedly mounted on the front end seat, and the front end assembly is configured so that during the assembly process between the instrument tube and the active bending section of the endoscope, the instrument tube can apply a traction force to the front end seat, and the traction force is used to pull the front end seat to be pre-tightened against the distal end of the active bending section.

2. The front end assembly according to claim 1, characterized in that: The instrument tube and the front end seat are integrally injection molded.

3. An insertion portion, characterized in that: It comprises an active bending section and the front end assembly as claimed in claim 1 or 2, wherein the front end seat of the front end assembly is pre-tightened and abuts against the distal end of the active bending section through traction of the instrument tube.

4. The insertion portion according to claim 3, characterized in that: The front end seat and the distal end of the active bending section are mutually sleeved, and the front end seat includes a first abutment portion arranged on a proximal side thereof, and the active bending section includes a second abutment portion arranged on a distal side thereof, and the front end seat is pre-tightened and abutted against the second abutment portion of the active bending section through the first abutment portion.

5. The insertion portion according to claim 4, characterized in that: The first abutting portion is a first step portion, and the second abutting portion is a second step portion; or, the first abutting portion is a first abutting inclined surface, and the second abutting portion is a second abutting inclined surface.

6. The insertion portion according to claim 4, characterized in that: The first abutting portion is arranged along the circumference of the front end seat, and the second abutting portion is arranged along the circumference of the active bending section.

7. The insertion portion according to any one of claims 4 to 6, characterized in that: In the opposite side surfaces of the front end seat and the active bending section, one is provided with a first limiting protrusion, and the other is provided with a first limiting recess, and the first limiting protrusion cooperates with the first limiting recess in the circumferential limit direction of the insertion portion.

8. The insertion portion according to any one of claims 4 to 6, characterized in that: The front end seat includes a sleeve portion arranged on the proximal side thereof and an inner bottom surface axially arranged in the sleeve portion. The front end seat is sleeved on the distal end of the active bending section through the sleeve portion, and the front end seat is pre-tightened against the distal end of the active bending section through the inner bottom surface.

9. The insertion portion according to any one of claims 3 to 6, characterized in that: In the relative abutting surfaces of the front end seat and the active bending section, one of them is provided with a second limiting protrusion, and the other is provided with a second limiting recess, and the second limiting protrusion cooperates with the second limiting recess in the circumferential or radial limit position of the insertion part.

10. An endoscope, characterized in that: The invention comprises a handle and the insertion part according to any one of claims 3 to 9, wherein the handle is connected to the insertion part.

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