Endoscope and sensor packaging structure thereof

Abstract

This utility model relates to the field of endoscopes, and provides an endoscope and its sensor packaging structure. The sensor packaging structure includes a base, a sensor, a steering prism, and a packaging bracket. The sensor and the packaging bracket are mounted on the base. The packaging bracket has a through-hole corresponding to the sensor position along the height direction of the sensor packaging structure. The steering prism is mounted on the side of the packaging bracket away from the base along the height direction and directly covers the through-hole. The steering prism, packaging bracket, and base are used to enclose a mounting cavity, in which the sensor is located. By mounting the steering prism on the packaging bracket and directly covering the through-hole, an additional protective glass is not required to cover the through-hole, thereby reducing the packaging height. This allows for increasing the height of the steering prism to improve imaging effects or reduce the overall aperture of the endoscope.

Description

Technical Field

[0001] This utility model relates to the field of endoscopes, and more particularly to a sensor packaging structure for an endoscope. Background Technology

[0002] Electronic endoscopes are endoscope products where the image sensor is placed at the lens end. High-resolution endoscopes commonly use optical imaging components, typically including an objective lens, a steering prism, and an image sensor. Within the limited structural space of an endoscope, using a steering prism can alleviate the limitation imposed by the inner diameter space of the outer sleeve on the size of the image sensor packaging structure (referred to as the sensor packaging structure), adapting to narrow tube spaces, thereby expanding the selection range of image sensors, and simultaneously increasing the spacing between the left and right optical paths, improving the 3D effect. In conventional endoscope optical modules, the steering prism is usually glued to the outside of the protective glass of a chip-level package or bare chip package, and then the steering prism is attached to the outside of the protective glass. This occupies a large space in the inner diameter direction of the sleeve, thus requiring either reducing the height of the steering prism to reduce the imaging area to ensure a sufficiently small endoscope diameter, or increasing the outer diameter of the endoscope to maintain the steering prism height and imaging area. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of large space occupied by the sensor and steering prism in the existing endoscope, and to provide an endoscope and its sensor packaging structure.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] An endoscope sensor packaging structure includes a base, a sensor, a steering prism, and a packaging bracket. The sensor and the packaging bracket are mounted on the base. The packaging bracket has a through-hole along the height direction of the sensor packaging structure corresponding to the position of the sensor. The steering prism is mounted on the side of the packaging bracket away from the base along the height direction and directly covers the through-hole. The steering prism, the packaging bracket, and the base are used to enclose a mounting cavity, and the sensor is located inside the mounting cavity.

[0006] In this solution, the directional prism is mounted on the packaging bracket to directly cover the through-hole, eliminating the need for additional protective glass to cover the through-hole. This reduces the packaging height, making it easier to increase the height of the directional prism to improve imaging or reduce the overall aperture of the endoscope.

[0007] Preferably, the steering prism extends at least partially into the through-hole along the height direction.

[0008] In this design, the steering prism extends into the through-hole, which can further reduce the packaging height and also facilitates the improvement of the bonding strength between the steering prism and the packaging bracket.

[0009] Preferably, the packaging bracket has a bracket side portion and a bracket cover portion. The bracket side portion surrounds the side of the sensor, and the bracket cover portion is located on the side of the bracket side portion facing the steering prism along the height direction. The through-hole is formed in the bracket cover portion, and the steering prism is fixedly connected to the bracket cover portion and / or the bracket side portion.

[0010] In this design, the mounting bracket is configured in such a way that it can be used together with the base and the steering prism to form a mounting cavity.

[0011] Preferably, the steering prism is fitted to the surface of the bracket cover that is opposite to it along the height direction.

[0012] In this design, the bracket cover is configured to support the steering prism along the height direction.

[0013] Preferably, the steering prism is fitted to the side of the bracket along a surface perpendicular to the height direction.

[0014] In this design, the bracket is configured such that the side of the bracket can support the steering prism perpendicular to the height direction.

[0015] The bracket cover has a protruding portion extending toward the base along the height direction, and the protruding portion is arranged around the through hole.

[0016] In this design, the protruding portion strengthens the structure of the packaging bracket. When the steering prism extends into the through-hole, the protruding portion increases the contact area between the steering prism and the through-hole wall, thus improving the connection strength between the packaging bracket and the steering prism.

[0017] Preferably, the through-hole extends along the longitudinal direction of the sensor packaging structure to expose at least a portion of the bracket side, and the face of the steering prism facing the sensor side along the height direction is in contact with the exposed portion of the bracket side.

[0018] In this design, the through-hole extends along the length direction and exposes at least part of the bracket side, allowing the exposed bracket side to fit against the sensor-facing surface of the steering prism. This provides support for the steering prism along the height direction, thereby improving the support effect of the encapsulation bracket on the steering prism.

[0019] Preferably, the sensor packaging structure further includes a transparent support member, which supports the steering prism on its side and is installed on the side of the packaging bracket away from the base along the height direction. The support member is used to enclose the mounting cavity together with the steering prism, the packaging bracket, and the base.

[0020] In this solution, the steering prism is supported by a support member, which improves the support effect of the steering prism and makes it easier for the steering prism to be inserted into the through-hole. It also avoids making the steering prism too large in order to support it, resulting in a more compact structure.

[0021] Preferably, the steering prism has an incident surface on one side along the length of the sensor packaging structure, and the support is located on the side of the steering prism opposite to the incident surface along the length of the structure.

[0022] In this design, the side facing away from the incident surface along the length direction is away from the optical module, providing ample space. This side supports the steering prism, allowing for a larger supporting structure with good support performance. It also avoids occupying space on both sides along the width direction, thus facilitating fiber optic cable placement.

[0023] Preferably, the steering prism has an incident surface on one side along the length of the sensor packaging structure, and the sensor has no pins on the side along the length of the incident surface.

[0024] In this design, the pins are set up in such a way that the height of the steering prism extending into the through-hole can be avoided.

[0025] Preferably, the opposing surfaces of the steering prism and the encapsulation bracket are bonded together with adhesive.

[0026] An endoscope includes a sleeve and an optical module disposed within the sleeve. The endoscope further includes a sensor encapsulation structure of the endoscope as described in any of the above technical solutions. The sensor encapsulation structure is at least partially disposed within the sleeve, and the optical module is located on one side of the steering prism where the incident surface is disposed along the length direction of the sensor encapsulation structure.

[0027] Preferably, the endoscope further includes an optical module mounting base for mounting the optical module, the optical module mounting base being installed inside the sleeve.

[0028] Preferably, the optical module mounting base has a first mounting groove on one side along the length direction, and the base is installed in the first mounting groove.

[0029] Preferably, the optical module mounting base is provided with a second mounting slot, and the optical module is directly mounted in the second mounting slot.

[0030] Preferably, the endoscope includes two optical modules, two sensor packaging structures, two fiber optic assemblies, and an optical module mounting base. The optical module mounting base is installed inside the sleeve. The optical module mounting base has a first mounting slot and two second mounting slots, which are located on both sides of the optical module mounting base along the height direction.

[0031] The bases of the two sensor packaging structures are attached together along the height direction, and one side of the attached base along the length direction is installed in the first mounting slot. The two optical modules are respectively installed in the two first mounting slots, and the two optical fiber assemblies are respectively located on both sides of the optical module mounting base along the width direction of the sensor packaging structure.

[0032] The positive and progressive effects of this utility model are as follows:

[0033] By directly covering the viewing aperture by mounting the swivel prism on the packaging bracket, it is not necessary to set up an additional protective glass to cover the viewing aperture. This reduces the packaging height, making it easier to increase the height of the swivel prism to improve imaging effect or reduce the overall aperture of the endoscope. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the external appearance of the endoscope in Example 1;

[0035] Figure 2 This is a schematic diagram of the endoscope portion in Example 1;

[0036] Figure 3 This is a schematic diagram of the endoscope portion in Example 1;

[0037] Figure 4 This is a schematic diagram of the optical module mounting base in Example 1;

[0038] Figure 5 This is a schematic diagram of the sensor packaging structure in Example 2;

[0039] Figure 6 This is a cross-sectional view of the sensor packaging structure in Example 2;

[0040] Figure 7 This is a perspective view of the sensor packaging structure in Example 2;

[0041] Figure 8 This is a perspective view of the steering prism and packaging bracket in Example 2;

[0042] Figure 9 This is a schematic diagram of the packaging bracket in Example 2;

[0043] Figure 10 This is a schematic diagram of the packaging bracket in Example 2;

[0044] Figure 11 This is a schematic diagram of the sensor packaging structure in Example 3;

[0045] Figure 12 This is a cross-sectional view of the sensor packaging structure in Example 3;

[0046] Figure 13 This is a perspective view of the sensor packaging structure in Example 3;

[0047] Figure 14 This is a perspective view of the steering prism, support, and packaging bracket in Example 3;

[0048] Figure 15 This is a schematic diagram of the steering prism, support, and packaging bracket in Example 3;

[0049] Figure 16 This is a schematic diagram of the encapsulation bracket in Example 3.

[0050] Explanation of reference numerals in the attached figures:

[0051] Endoscope 10000;

[0052] Sensor packaging structure 1000;

[0053] Base 1;

[0054] Sensor 2, pin 21;

[0055] Package bracket 3, bracket side 31, bracket cover 32, protruding part 321, through hole 33;

[0056] 4-directional prism, 41-incident surface;

[0057] Mounting cavity 5;

[0058] Support component 6;

[0059] 2000 sleeve;

[0060] Optical module 3000;

[0061] Optical module mounting base 4000, first mounting slot 4100, second mounting slot 4200;

[0062] Fiber optic assembly 5000. Detailed Implementation

[0063] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0064] Example 1

[0065] This embodiment provides an endoscope, or simply an endoscope. Figures 1-4 This is a schematic diagram of this embodiment.

[0066] like Figures 1-3 The endoscope 10000 includes a sheath 2000, an optical module 3000, and a sensor packaging structure 1000. The optical module 3000 and the sensor packaging structure 1000 are at least partially disposed within the sheath 2000. The length, width, and height directions of the sensor packaging structure 1000 are L, W, and H directions, respectively, with L1 and L2 representing the positive and negative directions of L. The sensor packaging structure 1000 includes:

[0067] Base 1;

[0068] Sensor 2, also known as a chip, is mounted on base 1;

[0069] The encapsulation bracket 3 is mounted on the base 1 and has a through hole 33 at the position of the sensor 2 along the H direction;

[0070] The steering prism 4 is installed on the side of the packaging bracket 3 away from the base 1 along the H direction and directly covers the through hole. The steering prism 4 has an incident surface 41 on one side along the L1 direction. The optical module 3000 is disposed on the incident surface 41 side of the steering prism 4.

[0071] In this embodiment, the base 1, the encapsulation bracket 3, and the steering prism 4 are used to enclose the mounting cavity 5, and the sensor 2 is located inside the mounting cavity 5. The specific configuration of the sensor encapsulation structure 1000 in this embodiment can be referred to other embodiments.

[0072] By directly sealing the through-hole 33 by mounting the steering prism 4 on the packaging bracket 3, the need for an additional protective glass to seal the through-hole 33 is eliminated. This reduces the packaging height of the sensor 2, making it easier to increase the height of the steering prism 4 to improve imaging or reduce the overall aperture of the endoscope 10000's sleeve 2000. Using this embodiment, the sensor packaging height can be reduced by approximately 0.2 mm compared to traditional chip-level packaging.

[0073] like Figures 2-4The endoscope 10000 also includes an optical fiber assembly 5000 and an optical module mounting base 4000. The endoscope 10000 has two optical modules 3000, two sensor packaging structures 1000, and two optical fiber assemblies 5000. The optical module mounting base 4000 is installed inside the sleeve 2000. The bases of the two sensor packaging structures 1000 are attached along the H direction. One side of the base 1 along the L direction is installed on the optical module mounting base 4000. The two optical modules 3000 are respectively installed on both sides of the optical module mounting base 4000 along the H direction. The two optical fiber assemblies 5000 are respectively located on both sides of the optical module mounting base 4000 along the W direction.

[0074] The working principle of the endoscope 10000 is as follows: the fiber optic assembly 5000 is used to provide a light source to illuminate the object being inspected; the optical module 3000 is used to focus the light from the object into an image and transmit it to the steering prism; the steering prism is used to turn the image and transmit it to the sensor; and the sensor is used to transmit the image information for the operator to view.

[0075] like Figures 2-4 The optical module mounting base 4000 has a first mounting groove 4100 on one side along the L2 direction. The base 1 includes, but is not limited to, rigid boards made of materials such as ceramic plates or glass fiber epoxy resin copper-clad laminates (also known as FR4 copper-clad laminates), which are glued to the first mounting groove 4100. In other embodiments, the base can be made of rigid boards or flexible boards such as flexible printed circuit boards (FPCs). When using flexible boards, reinforcing structures can be provided on both sides of the flexible boards to improve structural strength.

[0076] like Figures 2-4 The optical module mounting base 4000 has symmetrically provided second mounting grooves 4200 along the W direction. The optical module 3000 is installed in the second mounting grooves 4200, and the outer circular surface of the optical module 3000 is in contact with the surface forming the second mounting groove 4200. The optical module 3000 is positioned by the second mounting groove 4200, which is simple and accurate. The shape of the second mounting groove 4200 can be determined according to the shape of the optical module 3000, and can be a V-shaped groove or a U-shaped groove, etc.

[0077] Example 2

[0078] This embodiment provides a sensor packaging structure for use in an endoscope. Figures 5-10 This is a schematic diagram of this embodiment. The orientation of the sensor packaging structure in this embodiment is defined in the same way as in Embodiment 1.

[0079] like Figures 5-8 The sensor packaging structure 1000 includes:

[0080] Base 1;

[0081] Sensor 2 is mounted on base 1;

[0082] The packaging bracket 3 is mounted on the base 1, such as... Figure 9 , Figure 10 The packaging bracket 3 has a through hole 33 at the position of the sensor 2 along the H direction;

[0083] The steering prism 4 is installed on the side of the packaging bracket 3 facing away from the base 1 along the H direction, and directly covers the through hole 33;

[0084] The base 1, the encapsulation bracket 3, and the steering prism 4 are used to enclose the mounting cavity 5, and the sensor 2 is located inside the mounting cavity 5.

[0085] like Figure 6 The steering prism 4 extends at least partially into the through-hole 33 along the H direction, which can further reduce the packaging height of the sensor 2 and also facilitates improving the bonding strength between the steering prism 4 and the packaging support 3. In other embodiments, the steering prism 4 may also be completely located outside the through-hole 33.

[0086] like Figure 9 , Figure 10 The encapsulation bracket 3 has a bracket side portion 31 and a bracket cover portion 32. The bracket side portion 31 surrounds the side of the sensor 2. The two sides along the L direction and the two sides along the W direction are both side surfaces. The bracket cover portion 32 is located on the side of the bracket side portion 31 facing the steering prism 4 along the H direction. A through hole 33 is opened on the bracket cover portion 32. The steering prism 4 is fixedly connected to the bracket cover portion 32 and the bracket side portion 31, so that together with the base 1 and the steering prism 4, they can form the mounting cavity 5.

[0087] like Figure 9 The through-hole 33 extends along the L direction, exposing at least a portion of the side portion 31 of the bracket, such as... Figure 8 The surface of the steering prism 4 facing the sensor 2 along the H direction is in contact with the exposed portion of the bracket side 31, so that the exposed portion of the bracket side 31 can support the steering prism 4.

[0088] like Figure 10 The bracket cover 32 has a protruding portion 321 extending toward the base 1 in the H direction, such as... Figure 6 The protrusion 321 is provided around the through hole 33. The protrusion 321 can strengthen the structure of the package holder 3.

[0089] Specifically, such as Figure 7 , Figure 8The side of the steering prism 4 along the L1 direction (the right side in the figure), the two sides along the W direction, and the side facing the packaging bracket 3 along the H direction are all glued and sealed to the packaging bracket 3 at the through-hole 33. The packaging bracket 3 provides reliable support for the steering prism 4 in the L, W, and H directions. The side of the steering prism 4 along the L1 direction and the two sides along the W direction are glued to the protrusion 321, which increases the contact area between the steering prism 4 and the wall of the through-hole 33, thus improving the connection strength between the packaging bracket 3 and the steering prism 4. In other embodiments, the protrusion 321 may not be provided. In other embodiments, the through-hole 33 may not extend to the side 31 of the bracket along the L direction.

[0090] like Figure 6 The incident surface 41 of the steering prism 4 is disposed on the side along the L1 direction. For example... Figure 9 The support member 6 is located on one side of the encapsulation bracket 3 along the L2 direction, away from the incident surface 41, and thus away from the optical module 3000. This side has a larger space in the endoscope, providing support for the steering prism 4. This allows for a larger structure supporting the steering prism 4, resulting in better support. It also avoids occupying space on both sides of the W direction, thus facilitating the arrangement of optical fibers.

[0091] like Figure 7 The pins 21 of sensor 2 are arranged on both sides of sensor 2 along the W direction to avoid occupying the space on one side along the L1 direction, thereby avoiding the pins 21 from limiting the height of the steering prism 4 extending into the through hole 33.

[0092] Example 3

[0093] This embodiment provides a sensor packaging structure for use in an endoscope. Figures 11-16 This is a schematic diagram of this embodiment. The main difference between this embodiment and embodiment 2 lies in the different support method for the steering prism. Other structures in this embodiment can be referred to in embodiment 2, and will not be repeated here.

[0094] like Figure 15 , Figure 16 The bracket cover 32 of the packaging bracket 3 is provided with a through hole 33 extending along the H direction. The steering prism 4 extends into the through hole 33. The two sides of the steering prism 4 along the L direction and the two sides along the W direction are connected and sealed to the packaging bracket 3 at the through hole 33 by adhesive. All four sides are also bonded to the protrusion 321 on the bracket cover 32, so that the inner wall of the through hole 33 forms support for the steering prism 4 along the L direction and the W direction.

[0095] like Figures 11-14The sensor 2's encapsulation structure also includes a transparent support 6. The support 6 can be made of, but is not limited to, glass, optical plastics (polymethyl methacrylate (PMMA), polycarbonate (PC), etc.). Figure 11 , Figure 12 The support member 6 is installed on the side of the encapsulation bracket 3 facing away from the base 1 along the H direction. In this embodiment, it is specifically bonded with adhesive. The support member 6 is set on the side of the steering prism 4 to support the steering prism 4. Supporting the steering prism 4 with the support member 6 can improve the support effect of the steering prism 4, making it easier for the steering prism 4 to extend into the through hole 33. It can also avoid making the size of the steering prism 4 too large in order to support it, making the structure more compact. Furthermore, the support member 6 is set on the side of the steering prism 4 along the L2 direction to support the steering prism 4. In the endoscope, this side is away from the optical module 3000, which allows the support member 6 to be set larger to improve the support effect. It can also avoid occupying the two sides in the W direction, thereby facilitating the arrangement of optical fibers.

[0096] The support member 6 can be connected to the steering prism 4 or the mounting bracket 3 by adhesive bonding, but is not limited to this. In this embodiment, the support member 6 and the steering prism 4 are made of the same material, specifically optical glass. During the manufacturing process of the steering prism 4, the steering prism 4 and the support member 6 are glued together, and then fine grinding and polishing are performed together to form an assembly, which is then installed onto the mounting bracket 3. The side of the support member 6 facing the mounting bracket 3 along the H direction is glued to the mounting bracket 3 to provide support for the steering prism 4 along the H direction.

[0097] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A sensor packaging structure for an endoscope, characterized in that, The device includes a base, a sensor, a steering prism, and a packaging bracket. The sensor and the packaging bracket are mounted on the base. The packaging bracket has a through-hole along the height direction of the sensor packaging structure corresponding to the position of the sensor. The steering prism is mounted on the side of the packaging bracket away from the base along the height direction and covers the through-hole. The steering prism, the packaging bracket, and the base are used to enclose a mounting cavity, and the sensor is located inside the mounting cavity.

2. The sensor packaging structure of the endoscope as described in claim 1, characterized in that, The steering prism extends at least partially into the viewing aperture along the height direction.

3. The sensor packaging structure of the endoscope as described in claim 1 or 2, characterized in that, The packaging bracket has a bracket side and a bracket cover. The bracket side surrounds the side of the sensor. The bracket cover is located on the side of the bracket side facing the steering prism along the height direction. The through hole is opened in the bracket cover. The steering prism is fixedly connected to the bracket cover and / or the bracket side.

4. The sensor packaging structure of the endoscope as described in claim 3, characterized in that, The steering prism is abutted against the surface of the bracket cover facing each other along the height direction; and / or, the steering prism is abutted against the side of the bracket facing each other along the perpendicular height direction.

5. The sensor packaging structure of the endoscope as described in claim 3, characterized in that, The bracket cover has a protruding portion extending toward the base along the height direction, and the protruding portion is arranged around the through hole.

6. The sensor packaging structure of the endoscope as described in claim 4, characterized in that, The through-hole extends along the length of the sensor packaging structure to expose at least a portion of the bracket side, and the face of the steering prism facing the sensor side along the height direction is in contact with the exposed portion of the bracket side.

7. The sensor packaging structure of the endoscope as described in claim 2, characterized in that, The sensor packaging structure also includes a transparent support member, which supports the steering prism on its side and is installed on the side of the packaging bracket away from the base along the height direction. The support member is used to enclose the mounting cavity together with the steering prism, the packaging bracket, and the base.

8. The sensor packaging structure of the endoscope as described in claim 7, characterized in that, The steering prism has an incident surface on one side along the length of the sensor packaging structure, and the support is located on the side of the steering prism opposite to the incident surface along the length of the structure.

9. The sensor packaging structure of the endoscope as described in claim 2, characterized in that, The steering prism has an incident surface on one side along the length of the sensor packaging structure, and the sensor has no pins on the side along the length of the incident surface.

10. An endoscope comprising a cannula and an optical module disposed within the cannula, characterized in that, The endoscope further includes a sensor packaging structure for the endoscope as described in any one of claims 1-9, wherein the sensor packaging structure is at least partially disposed within the sleeve, and the optical module is located on one side of the incident surface of the steering prism along the length direction of the sensor packaging structure.

11. The endoscope as claimed in claim 10, characterized in that, The endoscope also includes an optical module mounting base for mounting the optical module, the optical module mounting base being installed inside the sleeve; The optical module mounting base has a first mounting groove on one side along the length direction, and the base is installed in the first mounting groove; and / or, the optical module mounting base has a second mounting groove, and the optical module is installed in the second mounting groove.

12. The endoscope as described in claim 11, characterized in that, The endoscope includes two optical modules, two sensor packaging structures, two fiber optic assemblies, and an optical module mounting base. The optical module mounting base is installed inside the sleeve. The optical module mounting base has a first mounting slot and two second mounting slots, which are located on both sides of the optical module mounting base along the height direction. The bases of the two sensor packaging structures are attached together along the height direction, and one side of the attached base along the length direction is installed in the first mounting groove. The two optical modules are respectively installed in the two second mounting grooves, and the two optical fiber assemblies are respectively located on both sides of the optical module mounting base along the width direction of the sensor packaging structure.

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