Actuators for medical devices and related systems and methods

Abstract

According to an example, a handle assembly for a medical device may include a handle body; and a first knob for controlling movement of the distal end portion of the medical device, the first knob may include a first axis of rotation; and a second knob for controlling movement of the distal end portion of the medical device, the second knob may include a second axis of rotation, where the first axis of rotation may be spaced apart from the second axis of rotation.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority under 35 USC §119 to U.S. Provisional Application No. 63 / 344,236, filed on May 20, 2022, which is incorporated herein by reference in its entirety. Technical Field

[0002] Various aspects of the present disclosure generally relate to actuators for medical devices. More specifically, embodiments of the present disclosure relate to ergonomic actuators for endoscopes or other medical devices, and the like. Background Art

[0003] During endoscopic surgery, medical personnel operating the endoscope typically wrap their entire palm around the grip or handle portion of the device. The various actuators on the endoscope handle require medical personnel to twist their hands frequently and for long periods of time during surgery, which may cause strain or even injury. In some cases, activating different endoscope controls (such as knobs or lifters) may cause excessive movement of the medical personnel's thumb or other fingers, which may cause medical personnel's hand strain. Endoscope operators may experience wrist and hand discomfort from grasping and manipulating the endoscope handle and repeatedly adjusting their hands to contact the various actuators on the handle. In some cases, medical personnel may experience symptoms similar to carpal tunnel syndrome, tendonitis, or DeQuervain's tenosynovitis. When medical personnel feel fatigue or other pain in their fingers, hands, or wrists, medical personnel may switch from the primary grip position to a secondary grip position, which may not have as good a grip as the primary grip position, such as switching from a four-finger grip to a three-finger grip. Repeatedly reaching or twisting the fingers to access various actuators may increase fatigue or other pain.

[0004] When medical personnel repeatedly adjust their handles between surgical tasks, surgical procedures can be prolonged and made more difficult. Depending on the size of the medical personnel's hands, actuators may be located in non-optimal locations, increasing the number of hand adjustments required during surgery. For example, medical personnel with smaller hands may have difficulty reaching the endoscope's control knobs while holding the endoscope's handle. Summary of the invention

[0005] According to an example, a handle assembly for a medical device may include: a handle body; and a first knob for controlling movement of a distal portion of the medical device, the first knob being rotatable about a first rotation axis; and a second knob for controlling movement of the distal portion of the medical device, the second knob being rotatable about a second rotation axis, wherein the first rotation axis may deviate from the second rotation axis.

[0006] In another example, as the first knob extends away from the handle body, the first knob may taper toward the first rotation axis. As the second knob extends toward the handle body, the second knob may taper toward the second rotation axis. The first knob may include a gripping protrusion that extends radially outward from the radially outward surface of the first knob relative to the first rotation axis. The first rotation axis may be substantially parallel to the second rotation axis. The medical device may also include a gear assembly configured to rotate the first actuation shaft away from the second rotation axis as the second knob rotates around the second rotation axis. The gear assembly may be accommodated in a housing between the first knob and the second knob. The gear assembly may include: a first gear fixedly coupled to the second knob, a second gear fixedly coupled to the first actuation shaft, and a third gear meshed with the first gear and the second gear. The medical device may also include a second actuation shaft configured to rotate around the first rotation axis when the first knob rotates. The first actuation shaft may rotate around the first rotation axis. The second rotation axis may be spaced approximately ten millimeters from the first rotation axis. The handle body may include a first side and a second side opposite to the first side, wherein each of the first knob and the second knob is located on the first side. The radial outermost surface of the first knob relative to the first rotation axis is approximately the same as the radial outermost surface of the second knob relative to the second rotation axis. The first knob may include a series of radial protrusions, and each radial protrusion may include a recessed portion at the top end of the corresponding radial protrusion. In some examples, the gear assembly may include: a first gear coupled to the second knob, a second gear coupled to the first actuation shaft, and a third gear configured to mesh with the first gear and the second gear.

[0007] According to an example, a handle assembly for a medical device may include: a handle body; a first knob for controlling the movement of a distal portion of the medical device, the first knob being rotatable about a first rotation axis; a second knob for controlling the movement of a distal portion of the medical device, the second knob being rotatable about a second rotation axis; and a gear assembly, the gear assembly being configured to rotate a first actuation shaft when the second knob is rotated, wherein the first actuation shaft is rotatable about the first rotation axis, and wherein the second knob is deviated from the first knob. Each of the first and second knobs may include a radial protrusion, and each radial protrusion may be bent toward the handle body. Each of the first and second knobs may include a radial protrusion, and each radial protrusion may include a triangular top portion. Each of the first and second knobs includes a radial protrusion, wherein the radial protrusion of the first knob may be bent toward the handle body, and the radial protrusion of the second knob may be bent away from the handle body. The gear assembly may include: a first gear coupled to the second knob, a second gear coupled to the first actuation shaft, and a third gear configured to mesh with the first and second gears.

[0008] According to an example, a method of operating a medical device that may include a handle and an axis extending longitudinally from the handle may include: rotating a first knob of the handle relative to the handle about a first rotational axis to move a portion of the axis in a first direction; rotating a second knob of the handle relative to the handle about a second rotational axis to move a portion of the axis in a second direction; wherein the second direction may be different from the first direction, and wherein the first rotational axis is spaced apart from the second rotational axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0010] Figure 1A and 1B is a perspective view of an exemplary endoscope according to aspects of the present disclosure.

[0011] Figure 2A and 2B is a perspective view of a user's hand grasping an endoscope handle according to aspects of the present disclosure.

[0012] Figure 3 is a side view of a proximal portion of an exemplary handle assembly according to aspects of the present disclosure.

[0013] Figure 4A and 4B 2 are side and top views, respectively, of an exemplary handle assembly according to aspects of the present disclosure.

[0014] Figure 4C-4G According to aspects of the present disclosure, Figure 4A and 4B Various stereoscopic views of portions of an exemplary knob mechanism of a handle assembly in FIG. 1 , with portions removed to reveal interior portions of the knob mechanism.

[0015] Figure 4H According to aspects of the present disclosure, Figure 4A and 4B An enlarged cross-sectional view of the knob mechanism of the handle assembly in FIG.

[0016] Fig. 4I According to aspects of the present disclosure, Figure 4A and 4B A three-dimensional view of portions of an exemplary knob mechanism of a handle assembly in FIG. 1 , with portions removed to reveal interior portions of the knob mechanism.

[0017] FIG. 5A to FIG. 5D is a perspective view of an exemplary control knob according to aspects of the present disclosure.

[0018] Figure 5E is a side view of a proximal portion of a handle assembly according to aspects of the present disclosure.

[0019] FIG. 6A to FIG. 6D is a perspective view of an exemplary control knob according to aspects of the present disclosure.

[0020] Fig. 6E is a side view of a proximal portion of a handle assembly according to aspects of the present disclosure.

[0021] FIG. 7A to FIG. 7D is a perspective view of an exemplary control knob according to aspects of the present disclosure.

[0022] Fig. 7E is a side view of a proximal portion of a handle assembly according to aspects of the present disclosure.

[0023] FIG. 8A to FIG. 8D is a perspective view of an exemplary control knob according to aspects of the present disclosure.

[0024] Fig. 8E is a side view of a proximal portion of a handle assembly according to aspects of the present disclosure. DETAILED DESCRIPTION

[0025] Reference will now be made in detail to aspects of the present disclosure, examples of which are shown in the accompanying drawings. Whenever possible, the same or similar reference numbers will be used in the accompanying drawings to refer to the same or similar parts. The term "distal end" refers to the part farthest from the user when the device is introduced into the patient's body. In contrast, the term "proximal end" refers to the part closest to the user when the device is placed in the patient's body. In the various figures contained in this application, arrows marked with "P" and "D" are used to show the proximal and distal directions in the figures. As used herein, the terms "include", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device containing a list of elements includes not only those elements, but also other elements that are not explicitly listed or inherent in such processes, methods, articles or devices. The term "exemplary" is used as an "example" rather than an "ideal" meaning. In addition, relative terms (such as "approximately", "substantially", "approximately", etc.) are used to indicate that the numerical value or range may have a variation of ±10%.

[0026] Embodiments of the present disclosure are directed to improving a user's ability to grasp, manipulate, and otherwise apply force to handles and handle actuators of medical devices (e.g., endoscopes) during medical procedures. Embodiments of the present disclosure may help reduce the need to reposition a user's hand during surgery, reduce stress on a user's hand due to excessive finger movement or uncomfortable positioning of fingers, and maximize muscle strength during operation of a medical device, among other things.

[0027] Figure 1A and1B A perspective view of an exemplary endoscope system 100 including an endoscope 101 is shown. The endoscope 101 may include a handle assembly 106 and a flexible tubular shaft 108. The handle assembly 106 may include a biopsy port 102, a biopsy cap 103, an image capture button 104, an elevator actuator 107, a first locking lever 109, a second locking lever 110, a first control knob 112, a second control knob 114, a suction button 116, an air / water button 118, a handle body 120, and an umbilicus 105. All actuators, elevators, knobs, buttons, rods, ports, or caps of the endoscope system 100 may be used for any purpose and are not limited to any specific use implied by the respective names of each component used herein. The umbilicus 105 may extend from the handle body 120 to auxiliary devices, such as a control unit, a water supply system, or a vacuum source. Thus, the umbilicus 105 can transmit signals between the endoscope 101 and the control unit to control the illumination and imaging components of the endoscope 101 and / or receive image data from the endoscope 101. The umbilicus 105 can also provide fluid for flushing from the water supply system and / or provide fluid for suction to the distal tip 119 of the shaft 108. Buttons 116 and 118 control valves for suction and fluid supply, respectively. The shaft 108 can terminate at the distal tip 119. The shaft 108 can include a hinged portion 122 for deflecting the distal tip 119 in an upward, downward, leftward and / or rightward direction. Knobs 112 and 114 can be used to control such deflection, and locking rods 109 and 110 can lock the knobs 112 and 114 in a desired position, respectively. The handle body 120 can be tapered and can narrow as the handle extends distally, so that the profile of the handle body 120 is smaller at its distal end than at its proximal end.

[0028] The distal tip 119 may include an imaging device (e.g., a camera) and an illumination source (e.g., an LED or fiber optic). The distal tip 119 may face sideways. That is, the imaging device and the illumination source may be radially outward, perpendicular, approximately perpendicular, or otherwise transverse to the longitudinal axis of the shaft 108 and the distal tip 119.

[0029] Although the term "endoscope" may be used herein, it should be understood that other devices, including but not limited to duodenoscopes, colonoscopes, ureteroscopes, bronchoscopes, laparoscopes, sheaths, catheters, or any other suitable delivery devices or medical devices may be used in conjunction with the devices of the present disclosure.

[0030] When operating the endoscope system 100, the user can hold the handle assembly 106 (eg, Figure 2A106, such as the first and second control knobs 112, 114 and the first and second locking levers 109, 110. The user can grasp the handle assembly 106 by wrapping his hand around the handle body 120. While grasping the handle body 120, the user can operate the first and second control knobs 112, 114 and the lifting actuator 107 with the left thumb (by rotating about their axes), and can operate the image capture button 104, the suction button 116, and the air / water button 118 (each by pressing) with the fingers of the left hand.

[0031] Figure 2A and 2B The left hand 201 of an exemplary user is shown grasping the handle assembly 106. The user's left index finger 230 and middle finger 231 can be used to operate the suction button 116 and the air / water button 118. The user may have to extend and / or tighten his index finger or middle finger to activate the suction button 116 and / or the air / water button 118. The user may have to extend and / or tighten his left thumb and / or keep his left thumb in an uncomfortable position to operate the first and second control knobs 112, 114 and / or the lifting actuator 107. The actuator and handle assembly discussed below can help reduce the required extension and / or reduce the strain on the user's fingers and / or hands. The handle assembly 106 may have a central longitudinal axis 199 extending longitudinally through the handle assembly 106.

[0032] The user can position the thumb 202 of the gripping hand 201 on the lifting actuator 107 and move the thumb 202 to move the lifting actuator 107 along a circular path from a first position (eg, Figure 2A as shown) moves to a second position (as shown) Figure 2B As shown in Figure 2B As shown, when the thumb 202 moves from the first position to the second position, the palm 240 may move away from the handle body 120, and when the palm 240 moves away from the handle body 120, it may be difficult for the user to reach the suction button 116 and / or the air-water button 118 with the index finger or middle finger. In some examples, the user may use the thumb 202 to actuate the first and second control knobs 112, 114, and the user may need to reach the thumb 202 and may tighten the thumb 202 to actuate the control knob 114. The actuator and handle assembly discussed below can help reduce the movement required by the index finger and / or other fingers to actuate the suction button 116 and / or the air-water button 118, and can reduce the movement required by the thumb to actuate the first and second control knobs 112, 114 or other actuators during operation of the endoscope 101.

[0033] like Figure 3As shown, conventional control knobs 112 and 114 of endoscope 101 are coaxial. In other words, control knobs 112 and 114 have a common rotation axis 399 that extends through the center of typical control knobs 112 and 114, such as Figure 3 1 and 114. The control knob 112 has a central longitudinal axis and a central transverse axis that are parallel to the central longitudinal axis 191 and the central transverse axis 193 of the control knob 114, respectively. The coaxial arrangement of the control knobs 112 and 114 can limit the contact of the user's thumb 202 with the control knob 114. For example, a portion of the user's thumb 202 may be located within the groove of the control knob 112, and the user may need to reach and / or strain the thumb 202 to actuate the control knob 114.

[0034] Figure 4A and 4B 436. The handle assembly 406 may have the same or similar structure and function as similar elements of the handle assembly 106. Specifically, the image capture button 404, the umbilicus 405, the lift actuator 407, the first locking rod 409, the suction button 416, and the air / water button 418 are the same or similar to the image capture button 104, the umbilicus 105, the lift actuator 107, the first locking rod 109, the suction button 116, and the air / water button 118. The handle assembly 406 also includes a first control knob 412 and a second control knob 414, which function similarly to the first control knob 112 and the second control knob 414. The first control knob 412 includes alternating radial protrusions 417 and grooves 415 that are circumferentially spaced from each other and form a continuous surface 436. The second control knob 414 includes alternating radial protrusions 421 and recesses 419 that are circumferentially spaced from each other and form a continuous surface 438. The handle body 420 may include a first side 449 and a second side 451 on a side of the handle body 420 opposite to the first side 449.

[0035] The first control knob 412 may have a central longitudinal axis 291 and the second control knob 414 may have a central longitudinal axis 293 separated by a distance d such that the control knobs 412 and 414 do not share a common axis of rotation. Figure 4BAs shown, the first control knob 412 rotates about the rotation axis 391, while the second control knob 414 rotates about the rotation axis 393. The distance d between the central longitudinal axis 291 of the first control knob 412 and the central longitudinal axis 293 of the second control knob 414 can be about 10 (ten) millimeters. In some examples, the distance d between the central longitudinal axis 291 of the first control knob 412 and the central longitudinal axis 293 of the second control knob 414 can be between 1 millimeter and 50 millimeters (including 1 millimeter and 50 millimeters). Positioning the second control knob 414 closer to the first side 449 of the handle body 420 can position the control knob 414 closer to the user's thumb during operation, thereby allowing the user to more easily contact and / or reach the second control knob 414 with the thumb. Moving the position of the second control knob 414 closer to the first side 449 of the handle body 420 can also allow the user to operate the control knobs 412, 414 with one hand (e.g., the left hand) instead of both hands.

[0036] See also Figure 4B , surface 436 extends from first side 434 of first control knob 412 to second side 432 of first control knob 412. Surface 436 is angled relative to rotation axis 391 of first control knob 412, and in some examples, as surface 436 extends away from handle body 420, surface 436 may extend toward rotation axis 391 (e.g., Figure 4B 4. Surface 438 of second control knob 414 extends from first side 428 of second control knob 414 to second side 430 of second control knob 414. Surface 438 is angled relative to rotation axis 393 of second control knob 414, and in some examples, surface 438 may extend toward rotation axis 393 as surface 438 extends toward handle body 420 (e.g., Figure 4B shown).

[0037] The diameter of the first side 434 of the first control knob 412 is greater than the diameter of the second side of the first control knob 412. The diameter of the first side 428 of the second control knob 414 is greater than the diameter of the second side 430 of the second control knob 414. Since the surface 438 extends toward the rotation axis 393 as the surface 438 extends toward the handle body 120, this inclined configuration can facilitate the user's thumb 202 to contact the surface 438 when operating the second control knob 414.

[0038] The surfaces 436, 438 of the control knobs 412, 414 may include gripping protrusions 429, 431 (e.g., radial gripping protrusions) to improve gripping ability. Each gripping protrusion 429, 431 protrudes from an adjacent portion of the outer surface 438 having the gripping protrusion 429, 431. Each gripping protrusion 429, 431 may extend across the surface 438 substantially parallel to the rotation axis 393 and may extend radially outward from the rotation axis 393.

[0039] Figures 4C-4F A gear mechanism 470 is shown incorporated into the control knobs 412, 414. The gear mechanism 470 can be used to transmit the movement of the control knob 414 to the distal tip 119. The gear mechanism 470 may include: a first gear 422 having external teeth 440 fixedly coupled to the second control knob 414; a first shaft 425 fixedly coupled to the housing 477 and rotatably coupled to the first gear 422; a second gear 423 having external teeth 442; a second shaft 426 fixedly coupled to the second gear 423; and an idler gear 424 having external teeth 444 arranged to mesh with the external teeth 440 of the first gear 422 and the external teeth 442 of the second gear 423. The idler gear 424 is rotatably coupled to the third shaft 427, and the third shaft 427 is fixedly coupled to the housing 477. The second shaft 426 extends through the first control knob 412 and into the handle body 420 to reach the internal gear assembly 480 (such as Figure 4G and 4I 426, 427). A portion of the gears 422, 423, 424 and shafts 425, 426, 427 may be enclosed / contained within a housing 477, and the housing 477 may be positioned between the first control knob 412 and the second control knob 414. A mounting support 446 may extend from the housing 477, through an arched opening 448 of the first control knob 412, and to the handle body 420. The mounting support 446 fixedly couples the housing 477 to the handle body 420. The mounting support may be integrally formed with the handle body 420 and may be offset from the knob axis 391. The opening 448 surrounds a portion of the shaft 426. The opening 448 allows the first control knob 412 to rotate without interference from the mounting support 446. For example, when a user rotates the first control knob 412 about the rotation axis 391, the opening 448 moves relative to the fixed mounting support 446. In some examples, opening 448 can limit the rotation of first control knob 412 to less than 360 degrees in either direction, for example limiting the rotation to approximately 180 degrees. Mounting support 446 can be cylindrical and positioned about a portion of shaft 426. When a user rotates second control knob 414, mounting support 446 and housing 477 remain stationary while gears 422, 423, 424 and second control knob 414 rotate.

[0040] See also Figure 4H and 4I , the first control knob 412 can be coupled to a fourth shaft 433 extending into the handle body 420 and to an internal gear assembly 481 within the handle body 420. When the user rotates the first control knob 412, the fourth shaft 433 also rotates to move one or more actuation wires 491, for example, to deflect the distal tip 119 upward or downward. The second shaft 426 coupled to the second control knob 414, the fourth shaft 433 coupled to the first control knob 412, and the central fifth shaft 435 are concentric. The fifth shaft 435 is fixed to the handle body 420. The fourth shaft 433 surrounds the second shaft 426, and the second shaft 426 surrounds the fifth shaft 435. The shafts 426 and 433 rotate independently of each other and relative to the shaft 435 about the rotation axis 391. For example, rotation of the first control knob 412 about the rotation axis 391 rotates the fourth shaft 433 but does not move the second shaft 426.

[0041] See also Figure 4C-4G In operation, the gear mechanism 470 may provide a means for the second control knob 414 to rotate the shaft 426, thereby moving one or more actuation wires 490, for example, to bend a hinged portion at a distal portion of the endoscope. When the user rotates the second control knob 414 clockwise, the first shaft 425 and the first gear 422 rotate clockwise, and the teeth 440 mesh with the teeth 444 to rotate the idler gear 424 counterclockwise. When the idler gear 424 rotates counterclockwise, the teeth 444 mesh with the teeth 442 to rotate the second gear 423 clockwise. When the second gear 423 rotates clockwise, the shaft 426 also rotates clockwise, thereby moving one or more actuation wires 490. The first gear 422 may not be directly meshed with the second gear 423, but may be indirectly meshed with the second gear 423 through the idler gear 424.

[0042] The handle body 420 may include separate internal gear assemblies. For example, the gear assembly 480 associated with the first control knob 412 and the gear assembly 481 associated with the second control knob 414 (both shown in FIG. Fig. 4I middle). Figure 4G The handle body 420 is shown with a portion of the handle body removed to expose the internal gear assembly 481. Figure 4G The internal gear assembly 482 is removed to more clearly show the internal gear assembly 481. Figure 4G, the internal gear assembly 481 for the second control knob 414 includes: a fourth gear 450 having external teeth 452, which is coupled to the second shaft 426 and located within the handle body 420; a second idler gear 454 having external teeth 456; and a fifth gear 458 having external teeth 460. The second idler gear 454 is arranged between the fourth gear 450 and the fifth gear 458, so that the external teeth 456 mesh with the external teeth 452 and 460. The fifth gear 458 can be coupled to one or more actuation wires 490. As described above, as the second control knob 414 rotates clockwise, the second shaft 426 also rotates clockwise. As the second shaft 426 rotates clockwise, the fourth gear 450 also rotates clockwise. As the fourth gear 450 rotates clockwise, the external teeth 452 mesh with the external teeth 456, causing the second idler gear 454 to rotate counterclockwise. As second idler gear 454 rotates counterclockwise, external teeth 456 mesh with external teeth 460, causing fifth gear 458 to rotate clockwise and thereby move one or more actuation wires 490 to deflect distal tip 119 to the left or right.

[0043] Fig. 4I A portion of the handle assembly 406 is shown with a portion of the handle body 420 removed to expose the internal gear assemblies 480, 481. The internal gear assembly 480 may be adjacent to the internal gear assembly 481 within the handle body 420. Fig. 4I As shown, the internal gear assembly 480 coupled to the first control knob 412 may include: a sixth gear 462 having external teeth 464, which is coupled to the end of the fourth shaft 433 inside the handle body 420; a third idler gear 466 having external teeth 468; and a seventh gear 472 having external teeth 474. Gears 462, 466, and 472 may have similar structures and any features as gears 450, 454, and 458, respectively, and may be positioned adjacent to gears 450, 454, and 458, respectively. Each of gears 450, 454, 458, 462, 466, and 472 may be rotatably coupled to the inner portion of the handle body 420. As the first control knob 412 rotates clockwise, the shaft 433 and the sixth gear 462 rotate clockwise. As the sixth gear 462 rotates clockwise, the external teeth 464 mesh with the external teeth 468 to rotate the third idler gear 466 counterclockwise. As the third idler gear 466 rotates counterclockwise, the outer teeth 468 mesh with the outer teeth 474 to rotate the seventh gear 472 clockwise, thereby moving the one or more actuation wires 491 to deflect the distal tip upward or downward.

[0044] In one example, the user's thumb 202 can apply force to the second control knob 414 to rotate the second gear 423 clockwise or counterclockwise to deflect the distal tip 119 to the left or right. In some examples, the user's thumb 202 can apply force to the first control knob 412 to deflect the distal tip 119 upward or downward. The gear mechanism 470 provides a mechanism to deviate the rotation axis of the second knob 414 from the rotation axis of the first knob 412.

[0045] Figures 5A-5D 5 is a perspective view of an exemplary first control knob 512 and an exemplary second control knob 514. The control knobs 512 and 514 can replace the control knobs 112 and 114 on the handle body 120 (such as Figure 5E 519). The control knobs 512, 514 include alternating radial protrusions 516, 517 and grooves 518, 519, respectively, which are spaced apart from each other in the circumferential direction. The protrusions 516, 517 on the control knobs 512, 514 extend radially outward from the rotation knob axis 599, respectively. The number of protrusions 516, 517 and grooves 518, 519 of the control knobs 512, 514 is five, respectively, or any other suitable number. Each protrusion 516, 517 may include a top portion 540, 541, respectively; and each top portion 540, 541 may be located at the radially outermost portion of each protrusion 516, 517, respectively, relative to the rotation knob axis 599. Each top portion 540, 541 may include a top surface 522, 530 facing radially outward from the rotation knob axis 599, and a recessed portion 524, 532 recessed relative to the top surface 522, 530, respectively. The recessed portion 524, 532 can improve the gripping ability. The control knobs 512, 514 may include a softened curved surface along all edges of the control knobs 512, 514 (including the side edges 525, 531 of the top portions 540, 541). The softened curved edges 525, 531 can reduce the squeezing and / or poking effect on the user's thumb 202 when operating the first control knob 512 and / or the second control knob 514. The control knobs 512, 514 can be made of a plastic material (ABS, PP, etc.) or any other suitable material that can provide a softened surface. The control knobs 512 , 514 include channels 521 , 523 , respectively, to assist in assembling the control knobs 512 , 514 to the handle body 120 .

[0046] The first side 581 of the first control knob 512 can be substantially planar and can extend across portions of each protrusion 516. When the first control knob 512 is coupled to the handle body 120, the first side 581 can face in a direction away from the handle body 120. The second side 582 of the second control knob 514 can be substantially planar and can be configured to be positioned adjacent to the first side 581. By including the first side 581 on the first control knob 512 and the second side 582 on the second control knob 514, the second control knob 514 can be positioned on the handle body 120 proximate to the first control knob 512, which can reduce the degree of abduction required for the user's thumb 202 to reach and / or operate the second control knob 514.

[0047] The depth of the protrusion is defined as the distance from (1) the midpoint of the curve extending from the side edge 525, 531 of the top portion 540, 541 of the protrusion 516, 517 to the adjacent side edge 525, 531 of the top portion 540, 541 of the other protrusion 516, 517 to (2) the lowest point of the groove 518, 519. The lowest point of the groove 518, 519 may be the portion of the groove 518, 519 that is closest to the rotation axis 599. For example, Figure 5BAs shown, the depth of the protrusion 516 is defined as the distance Y from (1) the midpoint of the curve 598 extending from the side edge 525 of the top portion 540 of the protrusion 516 to the adjacent side edge 525 of the top portion 540 of the other protrusion 516 to (2) the lowest point of the groove 518. The length between the protrusions is defined as the distance from one side edge 525, 531 of the top portion 540, 541 of one protrusion 516, 517 to the adjacent side edge 525, 531 of the top portion 540, 541 of the other protrusion 516, 517. For example, the length between the protrusions 516 is defined as the distance X from one side edge 525 to the adjacent side edge 525 of the adjacent protrusion 516. The depth Y of each protrusion 516 of the first control knob 512 and the length X between the protrusions 516 may be approximately 13 mm and 32.00 mm, respectively. In some examples, the depth Y of each protrusion 516 of the first control knob 512 can be between 1 mm and 30 mm (inclusive), and the length X between the protrusions 516 of the first control knob 512 can be between 1 mm and 50 mm (inclusive). This can provide additional surface area for the user's thumb 202 to move along and / or through the groove 518 while operating the first control knob 512 or the second control knob 514. In some examples, the depth Y of the protrusion 517 and the length X between the protrusions 517 can be approximately 9 mm and approximately 22 mm, respectively. This can provide a narrower protrusion 517 on the second control knob 514 relative to the protrusion 516 of the first knob 512, which can allow the user's thumb 202 to easily contact both sides of the protrusion 517 during operation, such as rotating the second control knob 514 clockwise or counterclockwise. In some examples, the depth Y of the protrusions 517 can be between about 1 mm and about 30 mm, inclusive. In some examples, the length X between the protrusions 517 can be between about 1 mm and about 30 mm, inclusive.

[0048] The diameter of the second control knob 514 can be about 58 mm, which can position the second control knob 514 closer to the user. In some examples, the diameter of the second control knob 514 can be between about 10 mm and about 30 mm (including 10 mm and 30 mm). The first side 586 outer surface 534 of the second control knob 514 can protrude away from the handle body 120, while the second side 587 outer surface 536 of the second control knob 514 can be flat. This flat outer surface 536 allows the second control knob 514 to be positioned closer to the first control knob 512, and therefore closer to the handle body 120. In particular, the convex shape of the first side 586 outer surface 534 positions the top portion 541 of the protrusion 517 closer to the handle body 120. Positioning the control knobs 512, 514 closer to the handle body 120 reduces the distance the thumb 202 needs to travel to reach the control knobs 512, 514, and thus facilitates contact of the thumb 202 with the control knobs 512, 514. Figure 5E , the distance A from a point on the axis L1 defined along the outer surface 542 of the first side 545 of the handle body 120 to a point on the axis L2 defined along the first side 581 of the first control knob 512 and substantially perpendicular to the rotation knob axis 599 can be approximately 49 mm. In some examples, the distance A from a point on the axis L1 defined along the outer surface 542 of the first side 545 of the handle body 120 to a point on the axis L2 defined along the first side 581 of the first control knob 512 and substantially perpendicular to the rotation knob axis 599 can be between about 10 mm and about 30 mm (inclusive). The distance B from a point on the axis L1 to a point on the axis L3 defined along the outer surface 534 of the first side 586 of the second control knob 514 and substantially perpendicular to the rotation knob axis 599 is approximately 59 mm. By reducing the overall width of the handle body 120 combined with the first control knob 512 and the second control knob 514, the user may more easily contact the first control knob 512 and the second control knob 514 with the same hand that grasps the handle body 120, for example because the required contact distance from the handle body 120 to the first control knob 512 and the second control knob 514 is reduced. In some examples, a distance B from a point on the axis L1 to a point on the axis L3 defined along the outer surface 534 of the first side 586 of the second control knob 514 and substantially perpendicular to the rotation knob axis 599 may be between about 10 mm and about 30 mm, inclusive.

[0049] Figures 6A-6D 612 and 614. The control knobs 612 and 614 may replace the control knobs 112 and 114 on the handle body 120 (eg, Fig. 6E619). The control knobs 612, 614 include alternating radial protrusions 616, 617 and grooves 618, 619, respectively, which are spaced circumferentially from each other. Each of the control knobs 612, 614 may have any of the features discussed herein with respect to the control knobs 512, 514. The control knobs 612, 614 include a top 622, 623, respectively, having side edges 630, 631, respectively. Portions 624, 632 on the outer surface of the top 622, 623 may be recessed, respectively, and may improve gripping ability. Portions 632 may be channels extending across the top 623, respectively. The control knobs 612, 614 may include softened curved surfaces along all edges (including side edges 630, 631) of the protrusions 616, 617 of the control knobs 612, 614. The softened curved edge can reduce the squeezing and / or poking effect on the user's thumb 202 when operating the first control knob 612 and / or the second control knob 614, and can reduce the pulling force on the user's thumb 202 during operation. Each control knob 612, 614 includes an opening 621, 625, respectively, to assist in assembling the control knob 612, 614 on the handle body 120.

[0050] The depth Y of each protrusion 616 may be approximately 12 mm, and the length X between adjacent pairs of protrusions 616 of the first control knob 612 may be approximately 32 mm. This may provide additional surface area for the user's thumb 202 to move along the groove 618 when operating the first control knob 612, and may provide additional surface area for the user's thumb 202 to move along the groove 619 when operating the second control knob 614. In some examples, the depth Y of each protrusion 616 may be between approximately 1 mm and approximately 30 mm, inclusive, and the length X between adjacent pairs of protrusions 616 of the first control knob 612 may be between approximately 1 mm and approximately 30 mm, inclusive. The depth Y of the protrusion 617 and the length X between the protrusions 617 may be approximately 10 mm and approximately 22 mm, respectively. This can provide a narrower protrusion 617 on the second control knob 614, allowing the user's thumb 202 to easily contact both sides of the protrusion 617 to move the second control knob 614 up or down. In some examples, the depth Y of the protrusion 617 can be between 1 mm and 30 mm (inclusive), and the length X between the protrusions 617 can be between 1 mm and 30 mm (inclusive).

[0051] The diameter of the second control knob 614 can be approximately 58 mm, which can position the second control knob 614 closer to the user on the handle assembly 606. In some examples, the diameter of the second control knob 614 can be between 25 mm and 60 mm (inclusive). The first outer surface 638 on the first side 660 of the first control knob 612 can be a convex surface facing away from the handle body 120, while the second outer surface 640 on the second side 661 of the first control knob 612 can be a concave surface and can face the handle body 120. The curvature of the first outer surface 638 and the second outer surface 640 can position the first control knob 612 (particularly the protrusion 616) closer to the handle body 120. The outer surface 626 of the first side 670 of the second control knob 614 can be convex and can face away from the handle body 120. The outer surface 628 of the second side 671 of the second control knob 614 can be convex and can face the handle body 120 (such as Fig. 6E Because outer surface 628 faces handle body 120 and is convex (e.g., curved away from handle body 120), this can reduce interference with second control knob 614 when a user's thumb 202 operates first control knob 612 (e.g., due to increased space between control knobs 612, 614).

[0052] Positioning the control knobs 612, 614 closer to the handle body 120 shortens the distance the thumb 202 needs to move to reach the control knobs 612, 614, thereby allowing the user's thumb 202 to more easily contact the control knobs 612, 614. Fig. 6E For the handle assembly 606 of the embodiment of the present invention, a distance F from a point on the axis L1 defined along the outer surface 642 of the first side 641 of the handle body 120 to a point on the axis L6 defined along the outer surface 626 of the second control knob 614 and substantially perpendicular to the rotation knob axis 699 can be approximately 60 mm. A distance E from a point on the axis L1 to a point on the axis L5 defined along the outer surface 638 of the first side 660 of the first control knob 612 and substantially perpendicular to the rotation knob axis 699 can be approximately 49 mm. In some examples, the distance F from a point on axis L1 defined along the outer surface 642 of the first side 641 of the handle body 120 to a point on axis L6 defined along the outer surface 626 of the second control knob 614 and substantially perpendicular to the rotation knob axis 699 can be between 10 mm and 80 mm (inclusive); and the distance E from a point on axis L1 to a point on axis L5 defined along the outer surface 638 of the first side 660 of the first control knob 612 and substantially perpendicular to the rotation knob axis 699 can be between approximately 5 mm and 100 mm (inclusive).

[0053] Figures 7A-7D712 and 714. The control knobs 712 and 714 may replace the control knobs 112 and 114 on the handle body 120 (eg, Fig. 7E 724) and may have any of the features described herein with respect to the other control knobs 112, 114, 412, 414, 512, 514, 612, 614. Each control knob 712, 714 includes alternating radial protrusions 716, 717 and recesses 718, 719, respectively, which are spaced circumferentially from each other. The control knobs 712, 714 include a top 722, 724, respectively, having side edges 730, 731. The bottom edges 733, 735 of the tops 722, 724, respectively, may be wider than the corresponding top edges 729, 740 of the tops 722, 724, respectively, so that the radially outward surfaces 785, 786 of the tops 722, 724 relative to the rotation knob axis 799 widen as the outer surfaces 785, 786 extend from the top edges 729, 740 to the bottom edges 733, 735, respectively. The outer surface 785 of the top end 722 can be concave and include ribs 732 that can be arranged in a square shape. Each rib 732 can be a thin linear depression extending inward from the adjacent portion having the rib 732. The outer surface 786 of the top end 724 can be concave and triangular in shape. The concave outer surfaces 785, 786 of the top ends 722, 724 and the ribs 732 of the top end 722 can provide appropriate thumb support and / or improve gripping ability.

[0054] The control knobs 712, 714 may include a softened curved surface along all edges of the protrusions 716, 717, including the side edges 730, 731. The softened curved edges may reduce the squeezing and stabbing effects on the user's thumb 202 when operating the first control knob 712 and / or the second control knob 714. The control knobs 712, 714 include openings 721, 723, respectively, to assist in assembling the control knobs 712, 714 on the handle body 120. The first control knob 712 may not include a screw insert that is typically located on the first control knob 112. This may allow the second control knob 714 to be positioned closer to the first control knob 712, thereby reducing the degree of abduction required for the user's thumb 202 to reach and / or operate the second control knob 714.

[0055] The depth Y of each protrusion 716 of the first control knob 712 and the length X between adjacent protrusions 716 can be about 14 mm and about 29 mm, respectively. In some examples, the depth Y of each protrusion 716 of the first control knob 712 can be between 5 mm and 50 mm (including 5 mm and 50 mm), and the length X between adjacent protrusions 716 of the first control knob 712 can be between 5 mm and 30 mm (including 5 mm and 30 mm). This can provide additional surface area for the user's thumb 202 to move along the groove 718 when operating the first control knob 612 or the second control knob 614. The depth Y of each protrusion 717 and the length X between adjacent protrusions 717 can be about 11 mm and about 23 mm, respectively. In some examples, the depth Y of each protrusion 717 may be between about 1 mm and about 50 mm, inclusive, and the length X between adjacent protrusions 717 may be between about 1 mm and about 40 mm, inclusive. This may provide a narrower protrusion 717 on the second control knob 714, thereby allowing the user's thumb 202 to easily contact both sides of the protrusion 717 to move the second control knob 714 up and down. The smaller surface area of ​​the narrower protrusion 717 may also be easier to contact when the user's thumb 202 is extended.

[0056] The diameter of the second control knob 714 can be about 57 mm, bringing the second control knob 714 closer to the user. In some examples, the diameter of the second control knob 714 can be between about 5 mm and about 100 mm (including 5 mm and 100 mm). The outer surfaces 726, 736 can face away from the handle body 120 and can be convex, bringing the control knobs 712, 714 (particularly the protrusions 716, 717) closer to the handle body 120. The positioning of the control knobs 712, 714 closer to the handle body 120 reduces the distance required for the thumb 202 to reach the control knobs 712, 714, thereby allowing the user's thumb 202 to more easily contact the control knobs 712, 714.

[0057] For example, refer to Fig. 7EIn the handle assembly 706 of FIG. 1 , a distance I from a point on the axis L1 defined along the outer surface 742 of the first side 741 of the handle body 120 to a point on the axis L9 defined along the outer surface 726 of the second control knob 714 and substantially perpendicular to the rotation knob axis 799 can be approximately 59 mm. A distance G from a point on the axis L1 to a point on the axis L8 defined along the outer surface 736 of the first control knob 712 and substantially perpendicular to the rotation knob axis 799 can be approximately 47 mm. In some examples, a distance I from a point on the axis L1 defined along the outer surface 742 of the first side 741 of the handle body 120 to a point on the axis L9 defined along the outer surface 726 of the second control knob 714 and substantially perpendicular to the rotation knob axis 799 can be between 20 mm and 100 mm (inclusive). In some examples, a distance G from a point on axis L1 to a point on axis L8 defined along the outer surface 736 of the first control knob 712 and substantially perpendicular to the rotation knob axis 799 can be between 1 mm and 100 mm, inclusive.

[0058] Figures 8A-8D 814 is a perspective view of an exemplary first control knob 812 and an exemplary second control knob 814. The control knobs 812, 814 can have any of the features discussed herein with respect to the control knobs 112, 114, 412, 414, 512, 514, 612, 614, 712, 714. The control knobs 812 and 814 can replace the control knobs 112 and 114 on the handle body 120 (e.g., Fig. 8E 806 in the figure). The control knobs 812, 814 include alternating radial protrusions 816, 817 and grooves 818, 819, respectively, which are spaced apart from each other along the circumferential direction. The protrusions 816, 817 of the control knobs 812, 814 extend radially outward from the rotation knob axis 899. The control knobs 812, 814 include top ends 822, 824, respectively, and the top ends have side edges 825, 831. The outer surfaces 881, 882 of the top ends 822 and 824 may include gripping protrusions 832 and 844 to improve gripping ability. Each gripping protrusion 832, 844 protrudes from an adjacent portion of the outer surface 881, 882. Each gripping protrusion 832, 844 is oval and may have a central longitudinal axis that is substantially parallel to each adjacent gripping protrusion 832, 844. The control knobs 812 and 814 include openings 821 and 823, respectively, to assist in assembling the control knobs 812, 814 on the handle body 120. The first control knob 812 may not include a screw insert typically found on the first control knob 112. This may allow the second control knob 814 to be positioned closer to the first control knob 812, which may reduce the degree of abduction required for the user's thumb 202 to reach and / or operate the second control knob 814.

[0059] The depth Y of each protrusion 816 of the first control knob 812 and the length X between adjacent protrusions 816 can be about 14 mm and about 31 mm, respectively. In some examples, the depth Y of each protrusion 816 can be between 1 mm and 30 mm (inclusive). In some examples, the length X between adjacent protrusions 816 can be between 1 mm and 70 mm (inclusive). This can provide additional surface area for the user's thumb 202 to move along the groove 818 when operating the first control knob 812 or the second control knob 814. The depth Y of the protrusion 817 and the length X between adjacent protrusions 817 can be about 8 mm and about 21 mm, respectively. In some examples, the depth Y of the protrusion 817 can be between 1 mm and 50 mm (inclusive), and the length X between adjacent protrusions 817 can be between 5 mm and 30 mm (inclusive). This can provide a narrower protrusion 817 on the second control knob 814, allowing the user's thumb 202 to easily contact both sides of the protrusion 817 to move the second control knob 814 up or down. The narrower protrusion 817 can facilitate the operation of the second control knob 814 using the extended thumb 202.

[0060] The diameter of the second control knob 814 can be about 60 mm, which can position the second control knob 814 closer to the user. In some examples, the diameter of the second control knob 814 can be between 10 mm and 100 mm (inclusive). The protrusions 816, 817 can be bent toward the handle body 120 so that the protrusions 816, 817 are positioned closer to the handle body 120. The second control knob 814 can be thicker than the typical second control knob 114, thereby providing additional support for the user's thumb 202 and providing the user with additional surface area to place the thumb 202 on the outer surface of the top 824 during operation of the second control knob 814. For example, the width of the second control knob 814 measured along the rotation knob axis 899 can be about 10 mm or about 12 mm. In some examples, the width of the second control knob 814 measured along the rotation knob axis 899 can be between 1 mm and 30 mm.

[0061] For example, refer to Fig. 8EIn the handle assembly 806 of FIG. 1 , a distance K from a point on the axis L1 defined along the outer surface 842 of the first side 841 of the handle body 120 to a point on the axis L12 defined along the outer surface 836 of the second control knob 814 and substantially perpendicular to the rotation knob axis 899 can be approximately 59 mm. In some examples, the distance K from a point on the axis L1 defined along the outer surface 842 of the first side 841 of the handle body 120 to a point on the axis L12 defined along the outer surface 836 of the second control knob 814 and substantially perpendicular to the rotation knob axis 899 can be between 10 mm and 100 mm (inclusive). A distance J from a point on the axis L1 to a point on the axis L11 defined along the outer surface 826 of the first control knob 812 and substantially perpendicular to the rotation knob axis 899 can be approximately 46 mm. In some examples, a distance J from a point on axis L1 to a point on axis L11 defined along outer surface 826 of first control knob 812 and substantially perpendicular to rotation knob axis 899 can be between 5 mm and 80 mm, inclusive.

[0062] The handle assembly 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814 of the present disclosure can help the user position the user's fingers in an ergonomic manner when operating the endoscope 101 or other medical devices, can reduce the user's hand strain caused by excessive movement and / or extension of the fingers when operating the endoscope 101, and can reduce the chance of the user losing grip. In addition, the handle assembly 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814 can help prevent the user's hand from repeatedly repositioning on the medical device handle due to fatigue, strain or other difficulties. Each of the handle assemblies 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814 described above, whether used in conjunction with an endoscope system or any other medical device, can be used to enhance and / or facilitate the user's grip on the handle and / or enhance the operation of the handle assembly. Any portion of the handle assembly or control knob discussed herein can be incorporated into the handle of an endoscope or other medical device to improve the user's operation of the device. The handle assemblies 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814 disclosed herein can be used to enhance and / or facilitate the user's grip on the handle and / or enhance the operation of the handle assembly. 714, 812, 814 can allow multiple users with different sized hands and / or fingers to comfortably use the same handle assembly.Any features associated with any of the handle assemblies 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814 can be incorporated into any other examples of handle assemblies 406, 506, 606, 706, 806 and control knobs 412, 414, 512, 514, 612, 614, 712, 714, 812, 814.

[0063] It will be clear to those skilled in the art that various modifications and variations may be made to the disclosed apparatus and methods without departing from the scope of the present disclosure. Other aspects of the present disclosure will be clear to those skilled in the art from consideration of the specification and practice of the features disclosed herein. The specification and examples should be considered as exemplary only.

Claims

1. A handle assembly for a medical device, the handle assembly comprising: handle body; as well as a first knob for controlling the movement of the distal portion of the medical device, the first knob being rotatable about a first rotation axis; as well as a second knob for controlling the movement of the distal portion of the medical device, the second knob being rotatable about a second rotation axis; Wherein, the first rotation axis deviates from the second rotation axis. 2 . The handle assembly of claim 1 , wherein the first knob tapers toward the first rotation axis as the first knob extends away from the handle body.

3. The handle assembly of any one of the preceding claims, wherein the second knob tapers towards the second rotation axis as it extends towards the handle body.

4. The handle assembly of any one of the preceding claims, wherein the first knob includes a gripping protrusion extending radially outwardly from a radially outward surface of the first knob relative to the first rotation axis.

5. A handle assembly according to any one of the preceding claims, wherein the first axis of rotation is substantially parallel to the second axis of rotation.

6. The handle assembly of any one of the preceding claims, wherein the medical device further comprises a first gear assembly configured to rotate the first actuation shaft away from the second rotation axis when the second knob is rotated about the second rotation axis.

7. The handle assembly of claim 6, wherein the first gear assembly is housed within a housing between the first knob and the second knob.

8. The handle assembly of claim 6 or 7, wherein the first gear assembly includes a first gear fixedly coupled to the second knob, a second gear fixedly coupled to the first actuating shaft, and a third gear meshing with the first gear and the second gear.

9. The handle assembly of any one of claims 6 to 8, wherein the medical device further comprises a second actuation shaft configured to rotate about the first rotation axis when the first knob is rotated.

10. A handle assembly according to any one of claims 6 to 9, wherein the first actuating shaft is connected to a second gear assembly inside the handle body, wherein the second gear assembly includes a fourth gear connected to the first actuating shaft, a fifth gear connected to the actuating line, and a sixth gear meshing with the fourth gear and the fifth gear.

11. The handle assembly of any one of claims 6 to 10, wherein the first actuation shaft rotates about the first rotation axis.

12. A handle assembly according to any one of the preceding claims, wherein: The second rotation axis is spaced approximately 10 millimeters from the first rotation axis.

13. The handle assembly of any one of the preceding claims, wherein the handle body comprises a first side and a second side opposite the first side, wherein the first knob and the second knob are both located on the first side.

14. A handle assembly according to any one of the preceding claims, wherein the distance between the radially outermost surface of the first knob relative to the first rotation axis and the first rotation axis is approximately the same as the distance between the radially outermost surface of the second knob relative to the second rotation axis and the first rotation axis.

15. The handle assembly according to any one of the preceding claims, wherein the first knob comprises a series of radial projections, and each radial projection comprises a recessed portion at a top end of the respective radial projection.

Images