Endoscope head end and endoscope

Abstract

The endoscope head end comprises an outer tube, a lens support with the front portion penetrating out of the front end of the outer tube is installed in the outer tube in a matched mode, a first installation hole used for installing an image module is formed in the front end face of the lens support, and an instrument channel used for allowing an instrument to pass through is further formed in the lens support. A hose which can elastically stretch out and draw back in the radial direction is installed in the instrument channel, the outer wall of the tail end of the hose is connected with the lens support in a sealed mode, and an avoiding mechanism used for avoiding expansion of the hose is arranged on the side wall of the instrument channel. The caliber of the instrument channel can be changed, so that the use of instruments with different thicknesses can be met, and meanwhile, due to the elastic deformation of the hose, when a thin instrument is used, the situation that the operation accuracy is affected due to the fact that the caliber of the instrument channel is too large and the instrument shakes in the instrument channel is avoided.

Description

Technical Field

[0001] The invention relates to the field of endoscopes, in particular to an endoscope head end and an endoscope. Background Art

[0002] An endoscope is a device widely used in medical and other fields that allows visual inspection of areas that are difficult to observe directly. An endoscope usually includes an elongated insertion portion with a relatively small diameter, which extends from a handle to a distal end and is equipped with a head at the distal end. Taking a pyeloscope as an example, its head end usually includes a lens mount, a camera, a light source, and an instrument channel mounted on the lens mount. In order to reduce the patient's discomfort during the insertion of the endoscope and facilitate the insertion of the endoscope into the human body, the radial size of the head end of the endoscope is designed to be as small as possible, which greatly limits the selection and layout of the camera, light source, and instrument channel.

[0003] However, in existing endoscope designs, the caliber of the instrument channel is usually fixed. This means that during surgery, only instruments with a diameter smaller than the channel caliber, such as guide wires, can be used. This limits the use of guide wires with larger diameters, which in turn limits the flexibility and scope of application of the surgery to a certain extent. Therefore, existing endoscope designs have limitations when using instruments with larger diameters, which affects the diversity and flexibility of clinical surgery. Summary of the invention

[0004] The purpose of the present invention is to provide an endoscope head end and an endoscope to meet the use of instruments of different thicknesses, reduce the shaking of the instruments in the instrument channel, and ensure the accuracy of the operation.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides an endoscope lens end, including an outer tube, a lens holder whose front part passes through the front end of the outer tube is matched and installed in the outer tube, a first mounting hole for installing an image module is arranged on the front end surface of the lens holder, and an instrument channel for passing instruments is also arranged on the lens holder, a hose which can elastically expand and contract in the radial direction and whose outer wall at the rear end is sealed and connected to the lens holder is installed in the instrument channel, and an avoidance mechanism for avoiding the expansion of the hose is arranged on the side wall of the instrument channel.

[0006] Preferably, an elastically deformable C-shaped clamp is provided between the hose and the instrument channel.

[0007] Preferably, the C-shaped retaining ring comprises a C-shaped inner ring with a certain depth, and a C-shaped outer ring sleeved on the outer wall of the inner ring, and extension arms are extended from opposite ends of the outer ring along the axial direction of the outer ring.

[0008] Preferably, the avoidance mechanism is arranged on the side wall of the instrument channel corresponding to the notch at the front end of the lens holder.

[0009] Preferably, the lens bracket includes a front bracket whose tail is matched and installed in the outer tube, and a rear bracket installed in the outer tube and connected to the tail end of the front bracket, and the avoidance mechanism is arranged on the front bracket or on the front bracket and the rear bracket.

[0010] Preferably, the imaging module includes an illumination light source and a camera.

[0011] Preferably, the front end surface of the instrument channel forms an arc-shaped structure from an end adjacent to the first mounting hole to an end away from the first mounting hole.

[0012] Preferably, the tail end of the hose is connected to an instrument cannula for passing an instrument.

[0013] Preferably, the edge of the front end surface of the lens holder is rounded.

[0014] The technical solution of the present invention further provides an endoscope provided with the aforementioned endoscope head end.

[0015] In summary, the present invention includes the following beneficial technical effects:

[0016] The invention can change the diameter of the instrument channel through the avoidance mechanism on the hose and the side wall of the instrument channel, so as to meet the use of instruments of different thicknesses. At the same time, the elastic deformation of the hose ensures that when using thinner instruments, the accuracy of the operation will not be affected by the shaking of the instruments in the instrument channel due to the excessive diameter of the instrument channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the structure between the lens holder and the outer tube according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a lens bracket according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the lens holder according to an embodiment of the present invention.

[0021] Figure numerals: 1. outer tube; 2. lens bracket; 20. first mounting hole; 21. front bracket; 22. rear bracket; 3. imaging module; 4. instrument channel; 5. hose; 6. avoidance mechanism; 7. C-type clamp; 70. inner ring; 71. outer ring; 72. extension arm; 8. instrument cannula. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention discloses an endoscope lens end, comprising an outer tube 1, a lens holder 2 is matched and installed inside the outer tube 1 and passes through the front end of the outer tube 1, a first mounting hole 20 for mounting an image module 3 is arranged on the front end surface of the lens holder 2, an instrument channel 4 for instruments to pass through is also arranged on the lens holder 2, a hose 5 which can elastically expand and contract in the radial direction and the outer wall of the rear end is sealed and connected to the lens holder 2 is installed in the instrument channel 4, and an avoidance mechanism 6 for avoiding the expansion of the hose 5 is arranged on the side wall of the instrument channel 4.

[0024] Preferably, an elastically deformable C-shaped clamp ring 7 is provided between the hose 5 and the instrument channel 4 .

[0025] Preferably, the C-shaped retaining ring 7 includes a C-shaped inner ring 70 with a certain depth, and a C-shaped outer ring 71 sleeved on the outer wall of the inner ring 70 . Extending arms 72 are extended from opposite ends of the outer ring 71 along the axial direction of the outer ring 71 .

[0026] Preferably, the avoidance mechanism 6 is arranged on the side wall of the instrument channel 4 corresponding to the notch at the front end of the lens holder 2 .

[0027] Preferably, the lens bracket 2 includes a front bracket 21 whose tail is matched and installed in the outer tube 1 and a rear bracket 22 installed in the outer tube 1 and connected to the tail end of the front bracket 21, and the avoidance mechanism 6 is arranged on the front bracket 21 or on the front bracket 21 and the rear bracket 22.

[0028] Preferably, the imaging module 3 includes an illumination light source and a camera.

[0029] Preferably, the front end surface of the instrument channel 4 forms an arc-shaped structure from an end adjacent to the first mounting hole 20 to an end away from the first mounting hole 20 .

[0030] Preferably, the tail end of the hose 5 is connected to an instrument cannula 8 for passing instruments.

[0031] Preferably, the edge of the front end surface of the lens holder 2 is rounded.

[0032] Specifically, the present invention is implemented as follows Figures 1 to 4As shown in, an endoscope lens end includes an outer tube 1, which is a cylindrical structure with a hollow interior. A lens holder 2 is installed in the outer tube 1, and the front part of the lens holder 2 passes through the front end of the outer tube 1. That is to say, the rear part of the lens holder 2 is installed in the outer tube 1, and the front part of the lens holder 2 is outside the outer tube 1. The thickness of the front part of the lens holder 2 is not greater than the outer diameter of the outer tube 1. A first mounting hole 20 for installing an image module 3 is provided on the front end surface of the lens holder 2. The image module 3 is installed in the first mounting hole 20, and then the image module 3 is electrically connected to the control end of the endoscope by using a wire. At this time, the first mounting hole 20 can be a blind hole or a through hole along the axial direction of the outer tube 1. In the case of a blind hole, a through hole for the wire to pass through is provided at the bottom or side wall of the blind hole.

[0033] The image module 3 includes an illumination light source and a camera. The camera is used to collect and transmit images, and the illumination light source is used to provide lighting for the camera. For example, chambers are set on both sides of the camera, and then the illumination light source, cold light LED lamp or light-guiding optical fiber is sealed in the chamber with optical fiber glue. Finally, the camera and the illumination light source are integrated together to facilitate the installation of the head-end image module 3.

[0034] The lens holder 2 is also provided with an instrument channel 4 for passing instruments. A hose 5 is installed in the instrument channel 4, which can elastically expand and contract in the radial direction and whose outer wall at the rear end is sealed and connected to the lens holder 2. A avoidance mechanism 6 for avoiding the expansion of the hose 5 is provided on the side wall of the instrument channel 4. The instrument channel 4 is also arranged on the lens holder 2 along the axial direction of the outer tube 1 and is spaced apart from the first mounting hole 20. The instrument channel 4 is a through hole that passes through the front end and the rear end of the lens holder 2. The hose 5 is a rubber tube, which can expand or contract in the radial direction in the instrument channel 4. If the diameter of the guide wire inserted into the hose 5 is large, the guide wire will stretch the hose 5 in the radial direction, and the hose 5 will expand in the radial direction, and the caliber of the hose 5 will be increased, and the avoidance mechanism 6 on the side wall of the instrument channel 4 will not hinder the expansion of the hose 5, thus satisfying the use of guide wires of different diameters in a limited space; the hose 5 is sealed and connected at the outer wall of the tail end to the inner wall of the instrument channel 4 on the lens holder 2, thereby preventing debris from entering the end of the endoscope head from between the outer wall of the hose 5 and the instrument channel 4, and then entering the insertion tube of the endoscope connected to the tail of the head end.

[0035] Further improvements such as Figures 1 to 4As shown in the figure, an elastically deformable C-shaped clamp ring 7 is arranged between the hose 5 and the instrument channel 4. The C-shaped clamp ring 7 is arranged on the inner wall of the instrument channel 4, and the hose 5 is sleeved in the ring of the C-shaped clamp ring 7. The C-shaped clamp ring 7 is used to make the hose 5 have a certain mechanical strength, keep the hose 5 in a smooth state, and prevent the hose 5 from sticking together and affecting the passage of the instrument; the C-shaped clamp ring 7 includes a C-shaped inner ring 70 with a certain depth inside, and a C-shaped outer ring 71 sleeved on the outer wall of the inner ring 70. The inner ring 70 is sleeved on the outer wall of the hose 5 and extends along the axial direction of the lens holder 2. The length of is its depth. A certain depth increases the contact surface between the inner ring 70 and the hose 5, ensuring that the hose 5 can be uniformly stressed at different axial positions along the instrument channel 4. The outer ring 71 increases the elasticity of the inner ring 70 and maintains the strength of the hose 5 structure. Extended arms 72 are extended along the axis of the outer ring 71 at both opposite ends of the outer ring 71, that is, the extended arms 72 are extended axially at both ends of the opening of the outer ring 71. The extended arms 72 can extend in the same direction or in different directions, so that the forces applied to the two ends of the opening of the inner ring 70 are more uniform.

[0036] Further improvements such as Figures 1 to 4 As shown in the figure, the avoidance mechanism 6 is arranged on the side wall of the instrument channel 4 corresponding to the notch at the front end of the lens holder 2, that is, the opening direction of the notch is toward the front of the lens holder 2, and the notch can be a U-shaped or V-shaped notch. When the hose 5 is opened by force, the hose 5 will enter the notch to increase the diameter of the hose 5, thereby meeting the use of guide wires with larger diameters.

[0037] Further improvements such as Figure 3 and Figure 4 As shown in the figure, the lens bracket 2 includes a front bracket 21 whose tail is matched and installed in the outer tube 1, and a rear bracket 22 installed in the outer tube 1 and connected to the tail end of the front bracket 21. The front bracket 21 and the rear bracket 22 are snap-connected to facilitate the installation of the image module 3 and the hose 5 on the lens bracket 2. The avoidance mechanism 6 is arranged on the front bracket 21 or on the front bracket 21 and the rear bracket 22, that is, the avoidance mechanism 6 is arranged on the front bracket 21 alone. At this time, the part of the instrument channel 4 corresponding to the front bracket 21 is arranged into a C-shaped structure. After the front bracket 21 is connected to the rear bracket 22, A gap opening forward is formed, and the gap constitutes the avoidance mechanism 6; or the avoidance mechanism 6 is arranged on the front bracket 21 and the rear bracket 22 at the same time, the part of the instrument channel 4 corresponding to the front bracket 21 is arranged to be a C-shaped structure, and the part of the instrument channel 4 corresponding to the rear bracket 22 is provided with a rear gap at a position adjacent to the front bracket 21, and the rear gap is aligned with the open part of the C-shaped structure of the front bracket 21, thereby forming a gap with a greater depth than the previous method, that is, the depth of the avoidance mechanism 6 is greater, which is more conducive to the overall expansion and contraction of the hose 5.

[0038] Further improvements such as Figures 1 to 4 As shown in , the front end surface of the instrument channel 4 is in an arc-shaped structure from the end adjacent to the first mounting hole 20 to the end away from the first mounting hole 20, which reduces the surface area of ​​the head end surface, thereby facilitating the insertion of the head end into the human body. The edge of the front end surface of the lens holder 2 is rounded, and the rounded structure does not have protruding edges, reducing the resistance when the head end is inserted into the human body.

[0039] Further improvements such as Figure 1 As shown in the figure, the tail end of the hose 5 is connected with an instrument cannula 8 for the instrument to pass through. The instrument cannula 8 is used to be set in the insertion tube of the endoscope. It has a fixed tube diameter. If the tube diameter is larger than the diameter of the hose 5, it is convenient for the instrument to enter the human body through the instrument cannula 8.

[0040] An embodiment of the present invention further discloses an endoscope, comprising an endoscope head end as described above. The endoscope comprises an operating handle and an insertion tube (not shown in the figure) like the existing endoscope. The endoscope head end is installed at the front end of the insertion tube. The image module 3 at the endoscope head end is electrically connected to the operating handle through a wire arranged in the insertion tube. At the same time, a pipe connected to the instrument channel 4 is also arranged in the insertion tube. The pipe is used as a passage for the instrument on the endoscope. When the instrument cannula 8 is connected to the hose 5 at the endoscope head end, there is no need to arrange a pipe in the insertion tube of the endoscope as a passage for the instrument. It is only necessary to insert the instrument cannula 8 into the insertion tube.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An endoscope head end, characterized in that: The invention comprises an outer tube (1), wherein a lens holder (2) is matched and installed in the outer tube (1) and the front part of the lens holder (2) passes through the front end of the outer tube (1); a first installation hole (20) for installing an image module (3) is arranged on the front end surface of the lens holder (2); an instrument channel (4) for instruments to pass through is also arranged on the lens holder (2); a hose (5) which can elastically expand and contract in the radial direction and the outer wall of the rear end is sealed and connected to the lens holder (2) is installed in the instrument channel (4); and a avoidance mechanism (6) for avoiding the expansion of the hose (5) is arranged on the side wall of the instrument channel (4).

2. An endoscope head according to claim 1, characterized in that: A C-shaped clamping ring (7) capable of elastic deformation is arranged between the hose (5) and the instrument channel (4).

3. An endoscope head according to claim 2, characterized in that: The C-shaped clamping ring (7) comprises a C-shaped inner ring (70) with a certain depth and located inside, and a C-shaped outer ring (71) sleeved on the outer wall of the inner ring (70), and extension arms (72) are extended from opposite ends of the outer ring (71) along the axial direction of the outer ring (71).

4. An endoscope head according to claim 3, characterized in that: The avoidance mechanism (6) is arranged on the side wall of the instrument channel (4) corresponding to the notch at the front end of the lens holder (2).

5. An endoscope head according to claim 4, characterized in that: The lens bracket (2) comprises a front bracket (21) whose rear end is matched and installed in the outer tube (1) and a rear bracket (22) installed in the outer tube (1) and connected to the rear end of the front bracket (21); the avoidance mechanism (6) is arranged on the front bracket (21) or on both the front bracket (21) and the rear bracket (22).

6. The endoscope head according to claim 1, characterized in that: The image module (3) comprises an illumination light source and a camera.

7. The endoscope head according to claim 4, characterized in that: The front end surface of the instrument channel (4) forms an arc-shaped structure from an end adjacent to the first mounting hole (20) to an end away from the first mounting hole (20).

8. The endoscope head according to claim 2, characterized in that: The tail end of the hose (5) is connected to an instrument cannula (8) for passing instruments.

9. The endoscope head according to claim 5, characterized in that: The edge of the front end surface of the lens holder (2) is rounded.

10. An endoscope, characterized in that: An endoscope head end as described in any one of claims 1 to 9 is provided.

Images