Fixing structure and endoscope

Abstract

The utility model relates to the technical field of medical equipment, and discloses a fixing structure and an endoscope, the fixing structure can stably limit and fix an imaging assembly, the reliability is good, the imaging quality is ensured, and the accuracy requirement of the endoscope is met. The fixing structure is used for installing an imaging assembly, the fixing structure comprises a fixing seat, the imaging assembly is arranged in the fixing seat, and the fixing seat is provided with an axial limiting assembly and a radial limiting structure; the axial limiting assembly comprises a first axial limiting structure and a second axial limiting structure, the first axial limiting structure abuts against the top of the imaging assembly, and the second axial limiting structure abuts against the bottom of the imaging assembly; the radial limiting structure abuts against the circumferential side wall of the imaging assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a fixing structure and an endoscope. Background Art

[0002] Medical endoscopes have become an indispensable inspection equipment in modern medicine and are widely used in clinical diagnosis and treatment.

[0003] Medical endoscopes primarily consist of optical systems for illumination and observation, water and air channels for expanding and cleaning the body cavity, and forceps channels for delivering surgical instruments. The image sensor, located at the front end of the endoscope, is crucial for providing and displaying images of pathological conditions in the body cavity. The image sensor's mounting stability and detection accuracy are crucial for endoscopic inspection.

[0004] Currently, the image sensor of the front-end lens of an endoscope is integrated into the objective lens module. The image sensor and the objective lens module form an integral structure, namely the imaging assembly, which is installed in a fixed base by gluing or screwing. However, with the gluing method, the glue will age and debond over time, affecting the stability and firmness of the image sensor. With screwing, because the screws need to pass through the imaging assembly, the uneven force during the screwing process can easily cause the main light angle between the objective lens and the image sensor to be inconsistent or deviate too much, thereby affecting the imaging quality. Therefore, none of the existing methods of fixing image sensors can meet the requirements of endoscopes for reliability, accuracy, etc. Utility Model Content

[0005] In view of this, the present invention provides a fixing structure and an endoscope to solve the problem that existing methods of fixing image sensors cannot meet the requirements of the endoscope in terms of reliability, accuracy, etc.

[0006] In the first aspect, the utility model provides a fixing structure, which is used to install an imaging component, and the fixing structure includes: a fixing seat, the imaging component is arranged in the fixing seat, and the fixing seat is provided with an axial limiting component and a radial limiting structure; the axial limiting component includes a first axial limiting structure and a second axial limiting structure, the first axial limiting structure abuts the top of the imaging component, and the second axial limiting structure abuts the bottom of the imaging component; the radial limiting structure abuts the circumferential side wall of the imaging component.

[0007] Beneficial Effects: The fixing structure of the present invention is used to install the imaging component. The axial limiting component and radial limiting structure on the fixing base limit the imaging component, thereby achieving axial and radial fixation of the imaging component. Compared with the existing glue fixing method, this method of fixing the imaging component through the fixing structure is not affected by the length of use and has better reliability. Compared with the existing screw fixing method, it does not require damage to the imaging component structure, which helps to ensure the imaging quality of the imaging component.

[0008] In an optional embodiment, an assembly hole is formed in the fixing seat, and the imaging component is installed in the assembly hole.

[0009] Beneficial effects: In the fixing structure of the utility model, an assembly hole is formed in the fixing seat, and the imaging component is installed in the assembly hole. The assembly hole can protect the imaging component and reduce the possible damage caused by collision during the use of the imaging component.

[0010] In an optional embodiment, the first axial limiting structure is provided at an upper edge of the assembly hole, and the second axial limiting structure is provided at a lower edge of the assembly hole.

[0011] Beneficial effect: In the fixing structure of the present invention, the first axial limiting structure is arranged at the upper edge of the assembly hole, and the second axial limiting structure is arranged at the lower edge of the assembly hole, which makes full use of the space of the assembly hole, improves space utilization, and is conducive to reducing the overall volume of the fixing structure.

[0012] In an optional embodiment, the imaging component is installed in the fixed seat along an installation direction, the installation direction is parallel to the axial direction of the fixed seat, the second axial limiting structure is an elastic limiting structure, the imaging component can abut the second axial limiting structure, and the second axial limiting structure has a natural state in a limiting position and a deformed state in an avoidance position.

[0013] Beneficial effect: The fixing structure of the utility model sets the second axial limiting structure as an elastic limiting structure that can avoid the installation path. When installing the imaging component, the imaging component can abut the second axial limiting structure. Since the second axial limiting structure is elastic, the second axial limiting structure is opened outward by the force and changes from a natural state to a deformed state to avoid the installation path of the imaging component, so that the imaging component can be smoothly installed in the fixing seat, which is convenient for operation.

[0014] In an optional embodiment, the second axial limiting structure includes an elastic buckle, one end of the buckle is connected to the lower edge of the assembly hole, and the other end extends into the assembly hole, and the buckle has the natural state and the deformed state.

[0015] Beneficial effects: The fixing structure of the utility model, the second axial limiting structure includes a buckle, the buckle has a natural state in the limiting position and a deformed state in the avoidance position. This second axial limiting structure is simple and easy to set.

[0016] In an optional embodiment, the inner side of the buckle has a guiding slope, and the guiding slope is arranged to be inclined inward along the installation direction.

[0017] Beneficial effects: The fixing structure of the utility model has a guide slope on the inner side of the buckle, and the guide slope is set to be inclined inward along the installation direction. When installing the imaging component, the imaging component can squeeze the guide slope to make the buckle open and deform outward to avoid the installation path, so that the imaging component can be installed smoothly without damaging the structure of the imaging component, making the installation operation more convenient.

[0018] In an optional embodiment, there are at least two buckles, and adjacent buckles are spaced apart.

[0019] Beneficial effects: The fixing structure of the present invention is provided with at least two buckles, and at least two buckles can simultaneously form an axial lower limit for the imaging component, thereby improving the reliability of the structure.

[0020] In an optional embodiment, the first axial limiting structure includes a step surface provided on an upper edge of the assembly hole, and the step surface abuts against the top of the imaging assembly.

[0021] Beneficial effects: The fixing structure of the utility model, the first axial limiting structure includes a step surface arranged on the upper edge of the assembly hole, the step surface can abut the top of the imaging component to limit the imaging component. This first axial limiting structure is relatively simple, without redundant components, and directly uses the structure in the fixing seat to axially limit the imaging component. The design concept is ingenious and reasonable.

[0022] In an optional embodiment, the radial limiting structure includes a positioning hole and a positioning bolt, the positioning hole is formed on the side wall of the fixing seat, and the positioning bolt is suitable for being inserted into the positioning hole and abutting against the side wall of the imaging assembly.

[0023] Beneficial effects: The fixing structure of the utility model and the radial limiting structure include a positioning hole and a positioning bolt. The positioning hole is formed on the side wall of the fixing seat. The positioning bolt is installed in the positioning hole and abuts against the side wall of the imaging component. This radial limiting structure is simple and reliable, easy to install and set, and will not affect the structure of the imaging component or its imaging quality.

[0024] In a second aspect, the present invention further provides an endoscope, comprising an imaging component and the fixing structure as described above, wherein the imaging component is installed via the fixing structure.

[0025] Because the endoscope of the present invention includes the fixing structure of the present invention and has the same beneficial effects as the fixing structure, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the front end structure of the endoscope of the present invention;

[0028] Figure 2 for Figure 1 An enlarged schematic diagram of the middle W part;

[0029] Figure 3 for Figure 2 A front view of the display portion;

[0030] Figure 4 for Figure 3 Cross-sectional view along the A-A' direction;

[0031] Figure 5 for Figure 2 A side view of the display portion;

[0032] Figure 6 for Figure 5 Cross-sectional view along the B-B' direction;

[0033] Figure 7 This is an exploded schematic diagram of the front end structure of the endoscope of the present invention;

[0034] Figure 8 This is an exploded sectional view of the front end structure of the endoscope of the present invention;

[0035] Figure 9 is a schematic diagram of an imaging component in an endoscope of the present invention;

[0036] Figure 10 It is a cross-sectional view of the imaging assembly in the endoscope of the present invention;

[0037] Figure 11 This is an exploded schematic diagram of the imaging assembly in the endoscope of the present invention;

[0038] Figure 12 This is an exploded sectional view of the imaging component in the endoscope of the present invention.

[0039] Description of reference numerals:

[0040] 1. Imaging assembly; 101. Objective lens assembly; 102. Objective lens mount fixing; 103. Cable protection tube; 104. Image sensor circuit board; 105. Flexible circuit board; 106. T-shaped back-end circuit board; 107. Sensor cable harness;

[0041] 2. Fixing seat; 201. Assembly hole; 202. Positioning hole; 203. FPC outlet;

[0042] 3. Buckle;

[0043] 4. Step surface;

[0044] 5. Water vapor channel;

[0045] 6. Front-end cable;

[0046] 7. Front end housing;

[0047] 8. Lighting lens;

[0048] 9. Pliers. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0050] The following combination Figures 1 to 12 , describing embodiments of the fixing structure and endoscope of the present utility model.

[0051] According to an embodiment of the present utility model, on the one hand, a fixing structure is provided, which is used to install an imaging component 1, and the fixing structure includes: a fixing seat 2, the imaging component 1 is arranged in the fixing seat 2, and the fixing seat 2 is provided with an axial limiting component and a radial limiting structure; the axial limiting component includes a first axial limiting structure and a second axial limiting structure, the first axial limiting structure abuts the top of the imaging component 1, and the second axial limiting structure abuts the bottom of the imaging component 1; the radial limiting structure abuts the circumferential side wall of the imaging component 1.

[0052] This fixing structure places the imaging assembly 1 within the fixing base 2 and uses the axial limiting assembly and radial limiting structure on the fixing base 2 to limit the imaging assembly 1, thereby achieving axial and radial fixation of the imaging assembly. This method of fixing the imaging assembly through the fixing structure is not affected by the length of use, has better reliability, and does not require damage to the imaging assembly structure, thus helping to ensure the imaging quality of the imaging assembly.

[0053] like Figure 1-Figure 2 As shown, the endoscope front end structure includes the endoscope front end ( Figure 1 The tail of the front end of the endoscope is connected to the front end cable 6. The front end of the endoscope includes a front end shell 7 and a fixing seat 2. The front end shell 7 is arranged at the end of the fixing seat 2 away from the front end cable 6. The front end shell 7 is used to protect the fixing seat 2 and its internal structure, components, etc.

[0054] Specifically, the fixing base 2 is a columnar structure as a whole. In this embodiment, the fixing base 2 is a cylindrical structure to facilitate processing, forming and structural arrangement. The front end shell 7 is a cover-type structure, and the front end shell 7 is covered on the end of the fixing base 2 away from the front end cable 6.

[0055] like Figure 3-Figure 6 As shown, the imaging assembly 1, the lighting lens 8, the clamp channel 9, and the water vapor channel 5 are all fixedly assembled on the fixing base 2. Among them, the structure and function of the lighting lens 8, the clamp channel 9, and the water vapor channel 5 are the same as those in the prior art and are not described in detail here. In addition, the specific form in which the lighting lens 8, the clamp channel 9, and the water vapor channel 5 are arranged on the fixing base 2 is not limited by the present invention.

[0056] Imaging assembly 1 includes an image sensor, an objective lens assembly 101, and a flexible printed circuit (FPC) 105. The structure and function of objective lens assembly 101 are similar to those in the prior art and are not described here. FPC 105 includes a T-shaped rear-end circuit board 106 and a sensor cable harness 107. FPC 105 is housed within a cable protection tube 103.

[0057] The image sensor is integrated into the imaging assembly 1 and is primarily used to provide and display images of body cavity pathologies. Specifically, the image sensor comprises an image sensor circuit board 104, a T-shaped rear-end circuit board 106, a sensor cable bundle 107, and a cable protection tube 103. The mounting base 2 has an FPC outlet 203, through which the flexible printed circuit board 105 is adapted to pass and then be positioned within the cable protection tube 103 to establish a circuit connection.

[0058] The imaging component 1 is arranged in the fixed seat 2, and the fixed seat 2 is provided with an axial limiting component and a radial limiting structure to limit the axial and radial directions of the imaging component 1, and then limit the axial and radial directions of the image sensor, so that the position of the image sensor is stable and reliable, ensuring the accuracy of endoscopic detection.

[0059] The axial limiting assembly includes a first axial limiting structure and a second axial limiting structure. The first axial limiting structure abuts the top of the imaging assembly and is used to axially limit the imaging assembly 1 to the upper limit. The second axial limiting structure abuts the bottom of the imaging assembly and is used to axially limit the imaging assembly 1 to the lower limit. The first and second axial limiting structures can respectively axially limit the imaging assembly 1 to the upper and lower limits, and thus the image sensor to the upper and lower limits, thereby axially limiting and fixing the image sensor within the fixing base 2, ensuring that the image sensor is stably and securely positioned.

[0060] Furthermore, an assembly hole 201 is formed in the fixing seat 2 , the imaging assembly 1 is installed in the assembly hole 201 , the first axial limiting structure is arranged at the upper edge of the assembly hole 201 , and the second axial limiting structure is arranged at the lower edge of the assembly hole 201 .

[0061] Specifically, assembly hole 201 is located at an end of the mounting base 2 that is farther from the front housing 7. Assembly hole 201 is open at this end to facilitate installation of imaging assembly 1. The axial direction of assembly hole 201 is parallel to that of mounting base 2. To avoid positional interference with other structures on mounting base 2, assembly hole 201 is offset from the center of mounting base 2. The shape and dimensions of assembly hole 201 are identical to those of imaging assembly 1, making it suitable for accommodating and mounting imaging assembly 1.

[0062] Furthermore, the imaging component 1 is installed in the fixed seat 2 along the installation direction, the installation direction is parallel to the axial direction of the fixed seat 2, the second axial limiting structure is an elastic limiting structure, the imaging component 1 can abut the second axial limiting structure, and the second axial limiting structure has a natural state in the limiting position and a deformed state in the avoidance position.

[0063] The assembly hole 201 has an opening at one end away from the front housing 7, and the imaging assembly 1 is suitable for being inserted from bottom to top ( Figure 8 、 Figure 11 and Figure 12 The direction of the middle arrow is the installation direction) enters the assembly hole 201 to realize the assembly of the imaging component 1. In order to smoothly carry out the above-mentioned assembly process, the second axial limiting structure is an elastic limiting structure that can avoid the installation path, that is, when the imaging component 1 is installed into the assembly hole 201 along the installation direction, the second axial limiting structure can be deformed without hindering the above-mentioned installation process.

[0064] Furthermore, the second axial limiting structure includes an elastic buckle 3, one end of which is connected to the lower edge of the assembly hole 201, and the other end extends into the assembly hole 201. The buckle 3 has a natural state and a deformed state.

[0065] like Figure 10-12 As shown, elastic snaps 3 are provided at the lower edge of the assembly hole 201, and there are at least two snaps 3, with adjacent snaps 3 spaced apart. Specifically, there can be two, three, or four snaps 3, as long as they can firmly limit the lower portion of the imaging assembly 1. Adjacent snaps 3 are spaced apart to ensure the stability of the imaging assembly 1.

[0066] One end of the clip 3 is connected to the lower edge of the assembly hole 201, and the other end extends into the interior of the assembly hole 201, that is, all ends of the clips 3 away from the lower edge of the assembly hole 201 together form a limit position with a size smaller than the inner diameter of the assembly hole 201, so as to limit the lower part of the imaging component 1 so that the imaging component 1 will not fall out downward from the assembly hole 201.

[0067] When the buckle 3 is in a natural state, it can limit the lower part of the imaging assembly 1. When the buckle 3 is in a deformed state, the buckle 3 opens outward to avoid the installation path of the imaging assembly 1.

[0068] Furthermore, the inner side of the buckle 3 has a guiding slope, and the guiding slope is arranged to be inclined inward along the installation direction.

[0069] The inner side of the buckle 3 has a guide slope that gradually tilts inward along the installation direction, i.e., the upward end of the guide slope is closer to the center of the assembly hole 201 than the downward end. During installation of the imaging assembly 1, the imaging assembly 1 contacts the guide slope, and by abutting and squeezing the guide slope, the buckle 3 is deformed outward to avoid the installation path, allowing the imaging assembly 1 to be smoothly installed in the assembly hole 201 without damaging the imaging assembly structure and facilitating installation. In this embodiment, the guide slope is a flat surface.

[0070] Furthermore, the first axial limiting structure includes a step surface 4 provided on the upper edge of the assembly hole 201 , and the step surface 4 abuts against the top of the imaging assembly 1 .

[0071] A hole-shaped structure is further provided within the fixing base 2 above the assembly hole 201 for assembling the objective lens assembly 101 and the like. The inner diameter of this hole-shaped structure is smaller than that of the assembly hole 201, forming a stepped surface 4 at the upper edge of the assembly hole 201. This stepped surface 4 can abut against the top of the imaging assembly 1 to limit the axial position of the imaging assembly 1 and prevent it from slipping upward out of the assembly hole 201. Of course, to facilitate installation of the imaging assembly 1, the hole-shaped structure is in communication with the assembly hole 201.

[0072] Furthermore, the radial limiting structure includes a positioning hole 202 and a positioning bolt. The positioning hole 202 is formed on the side wall of the fixing seat 2 . The positioning bolt is installed in the positioning hole 202 and abuts against the side wall of the imaging assembly 1 .

[0073] Positioning hole 202 is formed in the side wall of fixing base 2 and is a through hole. A positioning bolt is adapted to be inserted into positioning hole 202 from the outside and abut against the side wall of imaging assembly 1, thereby preventing imaging assembly 1 from moving radially. Optionally, an internal thread is formed on the inner wall of positioning hole 202, and a matching external thread is formed on the outer wall of the positioning bolt. The positioning bolt is adapted to be screwed into the positioning hole, with the end of the positioning bolt proximate to imaging assembly 1 abutting against the outer wall of imaging assembly 1. Specifically, the end of the positioning bolt proximate to imaging assembly 1 abuts against the objective lens holder fixing portion 102 of imaging assembly 1.

[0074] The following describes the installation and fixing process of the imaging assembly 1 in conjunction with the accompanying drawings:

[0075] First, the image sensor and other devices are pre-integrated on the imaging component 1, and the imaging component 1 is assembled from bottom to top ( Figure 8 、 Figure 11 and Figure 12 (in the direction of the arrow) into the assembly hole 201 of the fixing base 2;

[0076] When the imaging component 1 contacts the guide inclined surface of the buckle 3, the imaging component 1 is installed by continuously applying force upward. The imaging component 1 will press the guide inclined surface outward, causing the buckle 3 to expand and deform outward, that is, the buckle 3 changes from a natural state to a deformed state. At this time, the buckle 3 avoids the installation path of the imaging component 1, and the imaging component 1 can continue to move upward until it completely enters the assembly hole 201. When the imaging component 1 no longer contacts the guide inclined surface, the buckle 3 returns to its natural state, axially limiting the imaging component 1. At this time, the step surface 4 abuts the top of the imaging component 1 to axially limit the imaging component 1.

[0077] Then, insert (screw) the positioning bolt into the positioning hole 202 until the end of the positioning bolt close to the imaging assembly 1 abuts against the objective lens holder fixing portion 102 of the imaging assembly 1, completing the installation of the positioning bolt. At this time, the positioning bolt radially limits the imaging assembly 1.

[0078] The installation and fixation of the imaging assembly 1 is now completed.

[0079] The above-mentioned installation and fixing process of the imaging assembly 1 does not damage the structure of the imaging assembly and does not affect the main light angle between the objective lens and the image sensor, thereby facilitating ensuring the imaging quality of the imaging assembly.

[0080] This embodiment also provides an endoscope, including an imaging assembly and a fixing structure as described above, wherein the imaging assembly is mounted via the fixing structure. The fixing structure is used to fix the imaging assembly 1 of the endoscope. Of course, the endoscope of this embodiment also has other structures and devices that are common to existing endoscopes, but since they are not involved in this embodiment, they will not be described in detail.

[0081] Through the combined action of the axial limiting assembly and the radial limiting structure, the imaging assembly 1 can be firmly set in the fixing seat 2, that is, the image sensor is firmly set in the fixing seat 2, making the structure stable and reliable, thereby ensuring the detection accuracy of the endoscope.

[0082] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A fixing structure, characterized in that: The fixing structure is used to install the imaging component (1), and the fixing structure comprises: a fixing seat (2), the imaging component (1) is arranged in the fixing seat (2), and the fixing seat (2) is provided with an axial limiting component and a radial limiting structure; the axial limiting component comprises a first axial limiting structure and a second axial limiting structure, the first axial limiting structure abuts against the top of the imaging component (1), and the second axial limiting structure abuts against the bottom of the imaging component (1); the radial limiting structure abuts against the circumferential side wall of the imaging component (1).

2. The fixing structure according to claim 1, characterized in that: An assembly hole (201) is formed in the fixing seat (2), and the imaging assembly (1) is installed in the assembly hole (201).

3. The fixing structure according to claim 2, characterized in that: The first axial limiting structure is arranged at the upper edge of the assembly hole (201), and the second axial limiting structure is arranged at the lower edge of the assembly hole (201).

4. The fixing structure according to claim 2, characterized in that: The imaging component (1) is installed in the fixing seat (2) along an installation direction, the installation direction is parallel to the axial direction of the fixing seat (2), the second axial limiting structure is an elastic limiting structure, the imaging component (1) can abut against the second axial limiting structure, and the second axial limiting structure has a natural state in a limiting position and a deformed state in an avoidance position.

5. The fixing structure according to claim 4, characterized in that: The second axial limiting structure comprises an elastic buckle (3), one end of the buckle (3) is connected to the lower edge of the assembly hole (201), and the other end extends into the assembly hole (201), and the buckle (3) has the natural state and the deformed state.

6. The fixing structure according to claim 5, characterized in that: The inner side of the buckle (3) is provided with a guiding inclined surface, and the guiding inclined surface is arranged to be inclined inwardly along the installation direction.

7. The fixing structure according to claim 5, characterized in that: At least two of the buckles (3) are provided, and adjacent buckles (3) are spaced apart.

8. The fixing structure according to claim 2, characterized in that: The first axial limiting structure comprises a step surface (4) provided on the upper edge of the assembly hole (201), and the step surface (4) abuts against the top of the imaging assembly (1).

9. The fixing structure according to claim 1, characterized in that: The radial limiting structure comprises a positioning hole (202) and a positioning bolt, wherein the positioning hole (202) is formed on the side wall of the fixing seat (2), and the positioning bolt is installed in the positioning hole (202) and abuts against the side wall of the imaging assembly (1).

10. An endoscope, characterized in that: The invention comprises an imaging component and a fixing structure according to any one of claims 1 to 9, wherein the imaging component is installed through the fixing structure.

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