An endoscope lever structure

Abstract

This utility model discloses an endoscope lever structure, including a handle housing, a damping ring, a base, and a lever. A limiting rod is erected on the inner wall of the handle housing, and the damping ring is fitted over the limiting rod. The base has a through hole at its center, and is fitted over the limiting rod. A raised limiting wall is arranged around the through hole, and a raised damping rib is provided on the limiting wall. The damping rib contacts the outer circumferential surface of the damping ring, pushing the damping ring towards the limiting rod. The lever is located on the side of the base and extends out of the handle housing. The damping ring fitted over the limiting rod, and the base fitted over the limiting rod, simultaneously limit the movement of both the damping ring and the base, facilitating the assembly of the lever structure. The damping ring achieves an interference fit between the base, the lever, and the handle housing. During lever rotation, the damping ring provides resistance, enabling stepless hovering of the lever. The damping ring provides friction, and the base experiences uniform force, resulting in a better feel for lever operation.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an endoscope lever structure. Background Technology

[0002] An endoscope is a commonly used instrument in clinical medical diagnosis and treatment. It is an instrument that enters the body through natural passages to perform examinations or treatments. An endoscope consists of an insertion part that goes into the body and an operating part that is operated from outside the body. By manipulating the operating part, the bending motion of the insertion part can be controlled, enabling the endoscope to examine different directions and areas within the body tissues.

[0003] The operating unit typically includes a handle and a control structure located within the handle. The control structure includes a rotating wheel and a traction cable connected to the wheel. When operating the endoscope, moving the rotating wheel causes the traction cable to move, which in turn moves the curved tube at the front end of the insertion section, thus achieving the bending motion of the insertion section. Most existing self-locking damping structures are eccentric, relying on the mutual compression and rotation between the side of the damping structure and the side of the lever mechanism to achieve self-locking. This structure suffers from uneven force distribution, resulting in a poor lever feel. Furthermore, these structures have many parts, requiring high precision in parts manufacturing, which affects assembly and production efficiency. Utility Model Content

[0004] In order to overcome at least one of the technical problems of the prior art, the present invention provides an endoscope lever structure that is convenient for production and installation, reduces assembly errors, and improves the operating feel.

[0005] An endoscope lever structure is provided, including a handle housing, a damping ring, a base, and a lever. A limit rod is erected on the inner wall of the handle housing, and the damping ring is sleeved on the limit rod. The base has a through hole at its center, and is sleeved on the limit rod. A raised limiting wall is provided around the through hole, and a raised damping rib is provided on the limiting wall, the damping rib contacting the outer peripheral surface of the damping ring. The lever is located on the side of the base and extends out of the handle housing.

[0006] The aforementioned endoscope lever structure has at least the following beneficial effects: The damping ring is fitted onto the limiting rod, and the base is fitted over the limiting rod, simultaneously limiting both the damping ring and the base, facilitating the assembly of the lever structure. The inner and outer circumferential surfaces of the damping ring contact the limiting rod and the limiting wall, respectively. The damping ring achieves an interference fit between the base, the lever, and the handle housing. During lever rotation, the damping ring provides resistance, enabling stepless hovering of the lever. The damping ring provides friction, resulting in uniform force distribution on the base, improving the lever's operational feel. The entire lever structure has fewer parts, a simpler structure, and lower interference fit tolerances, reducing processing and assembly difficulty. The strip-shaped damping ribs reduce the contact area between the damping ring and the base, changing surface contact to line contact, reducing the friction between the base and the damping ring during rotation, thus ensuring appropriate resistance during lever movement and ease of operation.

[0007] In some embodiments of the aforementioned endoscopic lever structure, the limiting lever includes an upper lever portion and a lower lever portion, the diameter of the lower lever portion being larger than the diameter of the upper lever portion. The damping ring is sleeved on the upper lever portion, with its lower surface abutting against the top surface of the lower lever portion. The change in the diameter of the limiting lever provides positioning and support for the installation of the damping ring, ensuring that the damping ring is installed correctly.

[0008] As a further improvement to the above solution, a raised limiting strip is provided on the outer circumferential surface of the limiting rod, and a corresponding limiting groove is provided on the damping ring. The limiting strip and the limiting groove extend along the axial direction of the limiting rod. When the damping ring is sleeved on the limiting rod, and when the damping ring is subjected to circumferential frictional force, the limiting strip engages in the limiting groove to limit the movement, preventing the damping ring from rotating along the circumferential surface of the limiting rod. This keeps the damping ring stationary, allowing it to provide stable frictional damping and ensuring the consistency of the lever's movement.

[0009] In some embodiments of the aforementioned endoscope lever structure, a reinforcing wall is provided on the side of the base, the lever is connected to the reinforcing wall, and a reinforcing rib is provided between the reinforcing wall and the limiting wall. Both the reinforcing wall and the reinforcing rib increase the connection strength between the base and the lever, enabling the lever to move in the same direction as the base, ensuring that the control force on the lever can be transmitted to the base.

[0010] In some embodiments of the above-described endoscope lever structure, a raised positioning ring is provided on the inner wall of the handle housing, and a positioning piece is provided on the lower surface of the base, with the positioning ring located around the positioning piece. When the base is fitted over the limiting rod, the positioning piece at the bottom of the base is surrounded by the positioning ring, which limits the movement of the base. This positioning ring guides and positions the base during rotation, preventing it from tilting or shifting, and ensuring the consistency and stability of the lever's movement.

[0011] In some embodiments of the aforementioned endoscope lever structure, the lower surface of the base is further provided with several protrusions, through which the base contacts the inner wall of the handle housing. The protrusions reduce the contact area between the base and the handle housing, changing surface contact to point contact, thereby reducing the friction between the base and the handle housing during rotation and ensuring moderate resistance during lever movement.

[0012] In some embodiments of the aforementioned endoscope lever structure, the handle housing includes an upper cover and a lower cover. The limiting rod is located on the lower cover, and an mounting rod is provided on the inner wall of the upper cover. The limiting rod has a hollow structure, and the mounting rod is inserted into the central hole of the limiting rod for assembly. The assembly of the mounting rod and the limiting rod enables the assembly of the handle housing. The mounting rod and the limiting rod abut against each other, providing axial support force to the cavity of the handle housing, thus increasing the connection strength of the handle housing.

[0013] In some embodiments of the above-described endoscope lever structure, a pressure block is further provided on the inner wall of the upper cover, and the pressure block abuts against the upper surface of the damping ring. The pressure block limits the movement of the damping ring on the upper surface, preventing the damping ring from moving upward. The pressure block cooperates with the mounting rod to position the upper cover, facilitating the assembly of the handle housing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort. Figure 1 This is an exploded view of a preferred embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the lower cover structure of a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the top cover in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the base structure of a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the damping ring in a preferred embodiment of the present invention. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Reference Figures 1 to 6 An embodiment discloses an endoscope lever structure, including a handle housing 10, a damping ring 20, a base 30, and a lever 40. A limit rod 130 is erected on the inner wall of the handle housing 10, and the damping ring 20 is sleeved on the limit rod 130. The base 30 has a through hole 310 at its center, and is sleeved on the limit rod 130. A raised limiting wall 320 is provided around the through hole 310, and a raised damping rib 321 is provided on the limiting wall 320. The damping rib 321 contacts the outer peripheral surface of the damping ring 20, pushing the damping ring 20 towards the limit rod 130. The lever 40 is located on the side of the base 30 and extends out of the handle housing 10.

[0018] During installation, the damping ring 20 is fitted over the limiting rod 130, and the base 30 is fitted over both the limiting rod 130 and the damping ring 20. The limiting rod 130 of the handle housing 10 simultaneously limits the damping ring 20 and the base 30, facilitating the assembly of the lever structure. After assembly, the damping ring 20 is located between the limiting rod 130 and the base 30. The inner and outer circumferential surfaces of the damping ring 20 contact the limiting rod 130 and the limiting wall 320, respectively. The damping ring 20 provides an interference fit contact surface for the assembly of the base 30 and the handle housing 10. The damping ring 20 provides friction during the rotation of the lever 40, achieving damping self-locking of the lever 40.

[0019] The base 30 is a rigid component, while the damping ring 20 is a flexible component. The rigid material of the base 30 ensures structural stability and provides stable support for the damping ring 20, while the flexible material of the damping ring 20 not only provides damping but also allows for deformation, facilitating the installation of the damping ring 20 with the limiting rod 130. The entire lever structure has few parts, a simple structure, and low interference tolerance requirements, reducing the difficulty of processing and assembly.

[0020] In the embodiment shown in the attached figure, a damping rib 321 is also provided on the outer surface of the limiting wall 320. The damping rib 321 is ring-shaped around the limiting wall 320 and contacts the damping ring 2. The damping rib 321 reduces the contact area between the damping ring 20 and the base 30, changing the surface contact to a line contact, reducing the friction force when the base 30 and the damping ring 20 rotate, providing a suitable damping, ensuring that the resistance of the lever 40 is appropriate when it moves, and making it easy to operate.

[0021] In some other embodiments, multiple damping ribs 321 may be provided, arranged from top to bottom. The damping ribs 321 may also be discontinuous strips, evenly distributed on the inner wall of the limiting wall 320 to ensure uniform distribution of frictional force on the circumference of the base 30 and good tactile feedback of the lever 40. Furthermore, the damping ribs 321 may also be spirally wound around the limiting wall 320; the structure of the damping ribs 321 is not limited.

[0022] See attached document Figure 3 In this embodiment, the limiting rod 130 includes an upper rod portion 131 and a lower rod portion 132. The diameter of the lower rod portion 132 is larger than the diameter of the upper rod portion 131. The damping ring 20 is sleeved on the upper rod portion 131, and the lower surface of the damping ring 20 abuts against the top surface of the lower rod portion 132. After the damping ring 20 is sleeved on the upper rod portion 131, its outer diameter is the same as that of the lower rod portion 132. The lower rod portion 132 of the limiting rod 130 provides vertical support and limitation for the damping ring 20, while the upper rod portion 131 provides circumferential positioning and support for the damping ring 20. The damping ring 20 mainly provides frictional resistance to the limiting wall 320 through contact with the circumferential surface of the upper rod portion 131.

[0023] The outer circumferential surface of the limiting rod 130 is provided with four protruding limiting strips 133, which are located at the intersection of the upper rod portion 131 and the lower rod portion 132. The four limiting strips 133 are evenly distributed. The damping ring 20 is provided with four corresponding limiting grooves 210. Both the limiting strips 133 and the limiting grooves 210 are vertical strips. When the damping ring 20 is sleeved on the upper rod portion 131 of the limiting rod 130, the limiting strips 135 are engaged in the limiting grooves 210. When the lever 40 drives the base 30 to rotate, the outer surface of the damping ring 20 is subjected to circumferential friction. The limiting grooves 210 keep the damping ring 20 stationary, preventing the damping ring 20 from rotating along the circumferential surface of the limiting rod 130. This allows the damping ring 20 to provide stable frictional damping and ensures consistent damping when the lever 40 moves.

[0024] See attached document Figure 5 The base 30 has a reinforcing wall 330 on its side, which is arc-shaped along the outer periphery of the base 30. The lever 40 is connected to the reinforcing wall 330, and a reinforcing rib 331 is provided between the reinforcing wall 330 and the limiting wall 320. The reinforcing wall 330 increases the connection area between the base 30 and the lever 40, and the reinforcing rib 331 increases the connection strength between the reinforcing wall 330 and the base 30. Together, they increase the connection strength between the base 30 and the lever 40. When the lever 40 moves, it can drive the base 30 to move in the same direction, ensuring that the control force on the lever 40 can be transmitted to the base 30, achieving a convenient and effortless operation.

[0025] The lower surface of the base 30 is provided with an annular mounting plate, and a plurality of protrusions 350 are provided at the bottom of the mounting plate. The base 30 contacts the inner wall of the handle housing 10 through the protrusions 350. The protrusions 350 further reduce the contact area between the base 30 and the handle housing 10, changing the surface contact to point contact, reducing the friction between the base 30 and the handle housing 10 when rotating, and ensuring that the resistance of the lever 40 is moderate when moving. In this embodiment, the protrusions 350 are spherical. The spherical contact surface is smaller, but it can still provide stable support and provide less friction, ensuring that the damping is appropriate and will not hinder the rotation of the base 30.

[0026] See attached document Figure 3 and 4The handle housing 10 includes an upper cover 110 and a lower cover 120. The limiting rod 130 is located in the lower cover 120. An installation rod 111 is provided on the inner wall of the upper cover 110. The limiting rod 130 has a hollow structure. The installation rod 111 is inserted into the central hole of the limiting rod 130 for assembly. The assembly of the installation rod 111 and the limiting rod 130 enables the handle housing 10 to be assembled. The installation rod 111 and the limiting rod 130 abut against each other, providing axial support force to the cavity of the mounting base 30 of the handle housing 10, ensuring space at the mounting location of the base 30, and thus increasing the connection strength of the handle housing 10.

[0027] The lower cover 120 is provided with a raised positioning ring 140, and the lower surface of the base 30 is provided with a positioning piece 340. The positioning piece 340 is located at the edge of the base, and the positioning ring 140 is located around the positioning piece 340. When the base 30 is fitted over the limiting rod 130, the positioning piece 340 at the bottom of the base 30 is surrounded by the positioning ring 140. The positioning ring 140 limits the movement of the base 30 on its outer periphery and can guide and position the base 30 when it rotates, preventing the base 30 from tilting or shifting, and ensuring the consistency and stability of the movement of the lever 40.

[0028] A pressure block 112 is also provided on the inner wall of the upper cover 110. The pressure block 112 is annular and abuts against the upper surface of the damping ring 20. The pressure block 112 limits the position of the damping ring 20 on the upper surface to prevent the damping ring 20 from moving upward. The pressure block 112 cooperates with the mounting rod 111 to position the upper cover 110, which facilitates the assembly of the handle housing 10.

[0029] When the upper cover 110 and lower cover 120 of the handle housing 10 are combined, the mounting rod 111 is inserted into the limiting rod 130, the positioning ring 140 limits the base 30, and the pressure block 112 limits the damping ring 20, thus realizing the assembly of the damping ring 20, the base 30 and the handle housing 10, making the assembly of the handle quick and convenient.

[0030] The above is a detailed description of the preferred embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. Other embodiments that can be obtained are all within the protection scope of the present utility model.

Claims

1. An endoscope lever structure, characterized in that: include Handle housing (10), with a limit rod (130) erected on the inner wall of the handle housing (10). Damping ring (20), the damping ring (20) is sleeved on the outside of the limiting rod (130); The base (30) has a through hole (310) at its center. The base (30) is sleeved on the limiting rod (130). A protruding limiting wall (320) is provided around the through hole (310). A protruding damping rib (321) is provided on the limiting wall (320). The damping rib (321) is in contact with the outer peripheral surface of the damping ring (20). A lever (40) is disposed on the side of the base (30) and extends out of the handle housing (10).

2. The endoscope lever structure according to claim 1, characterized in that: The limiting rod (130) includes an upper rod part (131) and a lower rod part (132). The diameter of the lower rod part (132) is larger than the diameter of the upper rod part (131). The damping ring (20) is sleeved on the upper rod part (131), and the lower surface of the damping ring (20) abuts against the top surface of the lower rod part (132).

3. The endoscope lever structure according to claim 1 or 2, characterized in that: The outer circumferential surface of the limiting rod (130) is provided with a protruding limiting strip (133), and the damping ring (20) is provided with a corresponding limiting groove (210). The limiting strip (133) and the limiting groove (210) extend along the axial direction of the limiting rod (130).

4. The endoscope lever structure according to claim 1, characterized in that: The base (30) has a reinforcing wall (330) on its side, the lever (40) is connected to the reinforcing wall (330), and a reinforcing rib (331) is provided between the reinforcing wall (330) and the limiting wall (320).

5. The endoscope lever structure according to claim 1, characterized in that: The inner wall of the handle housing (10) is provided with a raised positioning ring (140), and the lower surface of the base (30) is provided with a positioning piece (340), with the positioning ring (140) located around the positioning piece (340).

6. The endoscope lever structure according to claim 1, characterized in that: The lower surface of the base (30) is also provided with several protrusions (350), and the base (30) contacts the inner wall of the handle housing (10) through the protrusions (350).

7. The endoscope lever structure according to claim 1, characterized in that: The handle housing (10) includes an upper cover (110) and a lower cover (120). The limiting rod (130) is located on the lower cover (120). An installation rod (111) is provided on the inner wall of the upper cover (110). The limiting rod (130) has a hollow structure. The installation rod (111) is inserted into the center hole of the limiting rod (130) for assembly.

8. The endoscope lever structure according to claim 7, characterized in that: A pressure block (112) is also provided on the inner wall of the upper cover (110), and the pressure block (112) abuts against the upper surface of the damping ring (20).

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