Hard endoscope

Abstract

The utility model relates to a hard endoscope which comprises a mechanical system which comprises an endoscope body made of stainless steel, an endoscope outer tube, an inner tube, a light cone, an eyepiece cavity made of brass and a hard endoscope eyeshade made of black macromolecule high-temperature-resistant materials. The imaging system comprises an objective lens, a rod-shaped lens and an ocular lens; the lighting system comprises a light guide cone and filamentous light guide fibers; a bidirectional buffer device is arranged in the endoscope body, and the bidirectional buffer device is used for slowing down when the inner tube retracts inwards or slowing down when the inner tube extends outwards. According to the hard endoscope provided by the utility model, through the two-way buffer device, the speed can be reduced and the buffer effect can be generated in the process that the inner tube retracts inwards under the action of top pressure, and when the top pressure is removed, the speed is also reduced in the process that the inner tube extends outwards to be rebounded and recovered. Therefore, the effect of bidirectional buffering protection is achieved, and secondary damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of endoscope technology, and in particular to a rigid endoscope. Background Technology

[0002] Rigid endoscopes are primarily used for the diagnosis and / or treatment of lesions in the superficial and shallow natural cavities of the human body and in the oral cavity through puncture. They are widely used in the medical field both domestically and internationally. Many departments, such as urology (nephroscopy and cystoscopy), gynecology (hysteroscopy and laparoscopy), otolaryngology (sinusoscopy), and orthopedics (foraminal endoscopy, shoulder arthroscopy, knee arthroscopy, wrist arthroscopy), all use rigid endoscopes for examinations and surgeries. Rigid endoscopes provide clear images, are simple to operate, and are flexible and convenient, allowing doctors to directly observe lesions and examine and diagnose patients. Developing rigid endoscope technology has become an important direction in the current medical field. Endoscopes with cushioning devices can protect patients and the objective lens during use; however, this cushioning effect only occurs when the inner tube is under pressure. Once the pressure disappears, the inner tube will quickly rebound under the cushioning device, which can easily lead to secondary injury or further collision. Utility Model Content

[0003] To address the aforementioned problems, this technical solution provides a rigid endoscope.

[0004] To achieve the above objectives, the technical solution is as follows:

[0005] A rigid endoscope, including

[0006] The mechanical system includes a mirror body, an outer tube, an inner tube, and a light cone made of stainless steel; an eyepiece cavity made of brass; and a hard eyepiece cover made of black high-temperature resistant polymer material.

[0007] An imaging system, which includes an objective lens, a rod lens, and an eyepiece;

[0008] A lighting system, comprising a light guide cone and filamentous light guide fibers;

[0009] The endoscope body is equipped with a bidirectional buffer device, which decelerates the inner tube when it retracts inward or when it extends outward.

[0010] As described above, a rigid endoscope includes a handle with a length of 4.5cm to 6cm.

[0011] As described above, in a rigid endoscope, the diameter D of the outer tube is 4.5 mm to 5.5 mm, and the wall thickness ranges from D / 20 to D / 10 mm.

[0012] As described above, a rigid endoscope has an adjusting ring sleeved on the end of the inner tube and a positioning ring sleeved on the adjusting ring. The bidirectional buffer device includes buffer springs at both ends pressing against the adjusting ring and the positioning ring respectively. The positioning ring is threadedly connected to the endoscope body for fixation, and the adjusting ring slides relative to the positioning ring.

[0013] As described above, in a rigid endoscope, the side wall of the adjustment ring is provided with a pressure ring and a retaining ring arranged sequentially from the end to the center, and the buffer spring presses against the pressure ring and is sleeved on the retaining ring.

[0014] As described above, a rigid endoscope includes an eyepiece connector and a centering element disposed within the eyepiece connector, the centering element through which the inner tube passes.

[0015] As described above, the rigid endoscope further includes a mounting component on the eyepiece connector and a deceleration sleeve on the mounting component. The deceleration sleeve has a through hole for the inner tube to pass through, and the inner wall of the through hole has a plurality of deceleration rings arranged sequentially.

[0016] In a rigid endoscope as described above, the thickness of the deceleration ring gradually increases along the inward direction of the inner tube. The deceleration ring allows the inner tube to retract inward or prevents the inner tube from extending outward.

[0017] As described above, in a rigid endoscope, the mounting component is threadedly connected to the eyepiece connector, the mounting component has a mounting hole, and the deceleration sleeve is embedded in the mounting hole.

[0018] As described above, in a rigid endoscope, the mounting component has a clamping hole on its end face, and slots are provided on both sides of the mounting hole. The deceleration sleeve has protruding retaining rings on both sides for embedding into the slots.

[0019] The beneficial effects of this application are:

[0020] This invention provides a rigid endoscope that, through a bidirectional buffer device, decelerates during the inward retraction of the inner tube under pressure, creating a buffering effect. Conversely, when the pressure is removed, the inner tube also decelerates during its outward rebound. This achieves a bidirectional buffering protection effect, preventing secondary injury. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0023] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] A rigid endoscope, including

[0025] The mechanical system includes a mirror body 11 made of stainless steel, an outer tube 12, an inner tube 13, a light cone 14, an eyepiece cavity 15 made of brass, and a hard eyepiece cover 16 made of black high-temperature resistant polymer material.

[0026] An imaging system, comprising an objective lens, a rod lens, and an eyepiece 20;

[0027] The lighting system includes a light guide cone 25 and filamentous light guide fibers. A bidirectional buffer device 3 is provided inside the mirror body 11. The bidirectional buffer device 3 decelerates the inner tube 13 when it retracts inward or extends outward. The deceleration effect of the inner tube 13 retracting inward is less than the deceleration effect when it extends outward.

[0028] This invention provides a rigid endoscope that, through a bidirectional buffer device, decelerates during the inward retraction of the inner tube under pressure, creating a buffering effect. Conversely, when the pressure is removed, the inner tube also decelerates during its outward rebound. This achieves a bidirectional buffering protection effect, preventing secondary injury.

[0029] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the lens body 11 includes a handle 111, the length of which is 4.5cm to 6cm. In some examples, the length of the handle 111 can be any one of 4.5cm, 4.6cm, 4.7cm, 4.8cm, 4.9cm, 5cm, 5.1cm, 5.2cm, 5.3cm, 5.4cm, 5.5cm, 5.6cm, 5.7cm, 5.8cm, 5.9cm, and 6cm.

[0030] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the diameter D of the outer tube 12 is 4.5 mm to 5.5 mm, and the wall thickness is in the range of D / 20 to D / 10 mm.

[0031] This invention provides a rigid endoscope. In the mechanical system of the rigid endoscope, the endoscope body, outer tube, inner tube, and optical cone are made of stainless steel alloy, while the eyepiece cavity is made of brass. The eyecup of the rigid endoscope is made of black high-temperature resistant polymer material. The connections between the outer tube and the various parts of the endoscope body are seamlessly welded using laser technology, ensuring the overall airtightness of the endoscope. The endoscope body and eyecup are tightened and sealed using precision instruments, preventing them from falling off or leaking air during use. The endoscope tube and objective lens are sealed using adhesive or welding techniques, preventing leakage during use. The objective lens using metal welding technology offers better sealing. Traditional endoscopes with thin outer tubes are prone to deformation and breakage during surgery due to their thin walls, leading to chipping or breakage of internal optical components (objective lens, rod lens), resulting in blurred or severely lost images, increasing the risk of surgery. In this embodiment, the diameter D of the outer tube 12 is 4.5mm to 5.5mm, and the wall thickness ranges from D / 20 to D / 10mm, reducing damage to optical components and thus lowering the risk of surgery. In some examples, if the diameter D of the outer tube 12 is 4.5 mm, the wall thickness can be any one of 0.225 mm, 0.25 mm, 0.275 mm, 0.3 mm, 0.325 mm, 0.35 mm, 0.375 mm, 0.4 mm, 0.425 mm, and 0.45 mm. If the diameter D of the outer tube 12 is 4.8 mm, the wall thickness can be any one of 0.24 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, 0.34 mm, 0.36 mm, 0.38 mm, 0.4 mm, 0.42 mm, 0.44 mm, 0.46 mm, and 0.48 mm. If the diameter D of the outer tube 12 is 5mm, the wall thickness can be any one of the following: 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm, 0.4mm, 0.41mm, 0.42mm, 0.43mm, 0.44mm, 0.45mm, 0.46mm, 0.47mm, 0.48mm, 0.49mm, or 0.5mm. If the diameter D of the outer tube 12 is 5.2 mm, the wall thickness can be any one of the following: 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.4 mm, 0.41 mm, 0.42 mm, 0.43 mm, 0.44 mm, 0.45 mm, 0.46 mm, 0.47 mm, 0.48 mm, 0.49 mm, 0.5 mm, or 0.51 mm.If the diameter D of the outer tube 12 is 5.5 mm, the wall thickness can be any one of the following: 0.275 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.4 mm, 0.41 mm, 0.42 mm, 0.43 mm, 0.44 mm, 0.45 mm, 0.46 mm, 0.47 mm, 0.48 mm, 0.49 mm, 0.5 mm, 0.51 mm, 0.52 mm, 0.53 mm, 0.54 mm, or 0.55 mm. It is understood that the above dimensional scheme allows for tolerances. Because the main shaft (outer working tube) of the microscope adopts the aforementioned wall thickness design, the objective lens end of the outer tube features a smoother arc design, reducing friction and damage when in contact with animal tissue. This further reduces tissue irritation and improves the durability and safety of the equipment.

[0032] Furthermore, as a preferred embodiment of this solution and not a limitation, the endoscope 11 is provided with an adjusting ring 21 sleeved on the end of the inner tube 13, and a positioning ring 22 sleeved on the adjusting ring 21. The bidirectional buffer device 3 includes buffer springs 31 with their two ends pressing against the adjusting ring 21 and the positioning ring 22 respectively. The positioning ring 22 is threadedly connected to the endoscope 11 for fixation, and the adjusting ring 21 slides relative to the positioning ring 22. This can reduce the pressure on the inner tube, avoid stress concentration caused by pressure on the inner tube, and reduce surgical risks.

[0033] Furthermore, as a preferred embodiment of this solution and not a limitation, the side wall of the adjusting ring 21 is provided with a pressure ring 211 and a retaining ring 212 arranged sequentially from the end to the center. The buffer spring 31 presses against the pressure ring 211 and is fitted over the retaining ring 212. This facilitates the positioning and limiting of the buffer spring.

[0034] Furthermore, as a preferred embodiment of this solution and not a limitation, the eyepiece 20 includes an eyepiece connector 24 and a centering element 23 disposed within the eyepiece connector 24, the centering element 23 through which the inner tube 13 passes. This helps to improve the stability of the inner tube.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation, the bidirectional buffer device 3 further includes a mounting member 32 disposed on the eyepiece connecting seat 24, and a reduction sleeve 33 disposed on the mounting member 32. The reduction sleeve 33 has a through hole 331 through which the inner tube 13 passes, and the inner wall of the through hole 331 has a plurality of sequentially arranged reduction rings 332. The reduction rings can increase friction.

[0036] Furthermore, as a preferred embodiment of this solution and not a limitation, the thickness of the deceleration ring 332 gradually increases along the inward direction of the inner tube 13. The deceleration ring 332 allows the inner tube 13 to retract inward or prevents the inner tube 13 from extending outward. When the inner tube 13 retracts inward, the inclination direction of the inner tube and the deceleration ring is the same, reducing friction; conversely, the inclination direction of the inner tube and the deceleration ring is opposite, increasing friction.

[0037] Furthermore, as a preferred embodiment of this solution and not a limitation, the mounting component 32 is threadedly connected to the eyepiece connector 24, and the mounting component 32 is provided with a mounting hole 321, into which the reduction sleeve 33 is embedded. This facilitates replacement of the mounting component.

[0038] Furthermore, as a preferred embodiment of this solution and not a limitation, the mounting member 32 has a clamping hole 322 on its end face, and slots 323 are provided on both sides of the mounting hole 321. The reduction sleeve 33 has protruding retaining rings 333 on both sides for embedding into the slots 323. This facilitates replacement of the reduction sleeve.

[0039] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A rigid endoscope, characterized in that: include The mechanical system includes a mirror body (11) made of stainless steel, an outer tube (12), an inner tube (13), a light cone (14), an eyepiece cavity (15) made of brass, and a hard eyepiece cover (16) made of black high-temperature resistant polymer material. An imaging system, which includes an objective lens, a rod lens, and an eyepiece (20); The lighting system includes a light guide cone (25) and filamentous light guide fibers; The mirror body (11) is provided with a bidirectional buffer device (3), which is used to decelerate the inner tube (13) when it retracts inward or when it extends outward.

2. The rigid endoscope according to claim 1, characterized in that: The mirror body (11) includes a handle (111), the length of which is 4.5cm to 6cm.

3. A rigid endoscope according to claim 1, characterized in that: The diameter D of the outer tube (12) is 4.5 mm to 5.5 mm, and the wall thickness ranges from D / 20 to D / 10 mm.

4. A rigid endoscope according to claim 1, characterized in that: The mirror body (11) is provided with an adjusting ring (21) sleeved on the end of the inner tube (13) and a positioning ring (22) sleeved on the adjusting ring (21). The bidirectional buffer device (3) includes a buffer spring (31) with both ends pressing against the adjusting ring (21) and the positioning ring (22) respectively. The positioning ring (22) is threadedly connected to the mirror body (11) for fixation. The adjusting ring (21) slides relative to the positioning ring (22).

5. A rigid endoscope according to claim 4, characterized in that: The side wall of the adjusting ring (21) is provided with a pressure ring (211) and a retaining ring (212) arranged sequentially from the end to the center. The buffer spring (31) presses against the pressure ring (211) and is sleeved on the retaining ring (212).

6. A rigid endoscope according to claim 5, characterized in that: The eyepiece (20) includes an eyepiece connector (24) and a centering element (23) disposed in the eyepiece connector (24), through which the inner tube (13) passes.

7. A rigid endoscope according to claim 6, characterized in that: The bidirectional buffer device (3) further includes a mounting component (32) provided on the eyepiece connector (24) and a deceleration sleeve (33) provided on the mounting component (32). The deceleration sleeve (33) is provided with a through hole (331) through which the inner tube (13) passes. The inner sidewall of the through hole (331) is provided with a plurality of deceleration rings (332) arranged in sequence.

8. A rigid endoscope according to claim 7, characterized in that: The thickness of the deceleration ring (332) gradually increases along the inward direction of the inner tube (13). The deceleration ring (332) allows the inner tube (13) to retract inward or prevents the inner tube (13) from extending outward.

9. A rigid endoscope according to claim 7, characterized in that: The mounting component (32) is threadedly connected to the eyepiece connector (24), and the mounting component (32) is provided with a mounting hole (321), and the deceleration sleeve (33) is embedded in the mounting hole (321).

10. A rigid endoscope according to claim 9, characterized in that: The mounting component (32) has a clamping hole (322) on its end face, and slots (323) are provided on both sides of the mounting hole (321). The deceleration sleeve (33) has protruding retaining rings (333) on both sides for embedding into the slots (323).

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