Unlocking handle and headstock adjustment device

Abstract

The application relates to the technical field of medical devices, and provides an unlocking handle and a headstock adjusting device. The unlocking handle comprises a holding main body, an installation cavity arranged in the holding main body, an operation opening arranged on one side of the holding main body, an installation end arranged at one end of the holding main body and used for being connected with an adjusting device of a headstock, an unlocking hole arranged in the installation end and communicated with the installation cavity, a rotating piece rotatably arranged in the operation opening and movable between a locking position and an unlocking position, an unlocking rod movably arranged in the unlocking hole and movable between an initial position and a working position, a transmission rod arranged in the installation cavity and rotatably connected with the unlocking rod and the rotating piece at two ends, and an elastic piece arranged between the unlocking rod and an inner wall of the installation cavity and used for driving the unlocking rod to move towards the initial position. The rotating piece is at least partially exposed to the installation cavity when the rotating piece is in the locking position, and the unlocking rod is in the initial position. When the rotating piece is pressed to move to the unlocking position, the rotating piece pushes the unlocking rod to move to the working position against the elastic force through the transmission rod.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an unlocking handle and headrest adjustment device. Background Technology

[0002] In delicate surgeries such as neurosurgery, orthopedics, and plastic surgery, medical head frames are crucial for stabilizing the patient's head position, and their stability directly affects the success of the surgery and the patient's safety. To allow for flexible adjustment of the head posture during surgery to obtain the optimal surgical field of view and operating angle, the head frame is typically mounted on a dedicated adjustment device. This device securely fixes the head frame in position when locked and allows for multi-degree-of-freedom positional adjustment when unlocked.

[0003] Common adjustment devices typically employ simple button or lever unlocking mechanisms. Medical staff press this button or lever to release the lock, allowing the headrest to enter an adjustable position. However, even when the headrest is unlocked, the patient's head still requires continuous and stable support to prevent significant head movement. To unlock the device, medical staff must first support the patient's head or hold the headrest before pressing the button or lever; after adjustment, they must manually reset the button or lever to lock it. This process is cumbersome, often requiring multiple people, disrupting the flow of the procedure and impacting surgical efficiency and safety. Utility Model Content In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a locking handle and headrest adjustment device.

[0004] The first aspect of this application provides an unlocking handle, including: The gripping body has an internal mounting cavity, an operating port on one side, and a mounting end for connecting to the headrest adjustment device. The mounting end has an unlocking hole that communicates with the mounting cavity. A rotating component is rotatably disposed within the operating port and can move between a locked position and an unlocked position; The unlocking lever is movably inserted into the unlocking hole and can move between the initial position and the working position; A transmission rod is located inside the mounting cavity, with its two ends rotatably connected to the unlocking rod and the rotating component, respectively. An elastic element is disposed between the unlocking rod and the inner wall of the mounting cavity to drive the unlocking rod to move toward the initial position; When the rotating component is in the locked position, it is at least partially exposed in the mounting cavity, and the unlocking rod is in the initial position; when the rotating component is pressed to move to the unlocking position, the rotating component pushes the unlocking rod through the transmission rod to overcome the elastic force of the elastic component and move to the working position.

[0005] Optionally, the side of the unlocking rod is formed with a stepped structure, and the inner wall of the mounting cavity with the unlocking hole serves as an abutment wall; The elastic element includes a spring, which is sleeved on the unlocking rod and abuts against the stepped structure and the abutting wall; When the unlocking lever moves toward the working position in a direction away from the mounting cavity, the spring deforms to accumulate elastic potential energy.

[0006] Optionally, the unlocking rod includes a main rod body and an end head. The main rod body passes through the unlocking hole, and the end head is located at one end of the main rod body located in the mounting cavity and is rotatably connected to the transmission rod. Along the radial direction of the unlocking hole, the size of the end is larger than the size of the main rod, so that the end and the main rod form the stepped structure.

[0007] Optionally, the holding body includes a housing and a first guide member, the first guide member being fixed to one end of the housing, the first guide member extending axially along the unlocking rod, and a portion of the first guide member entering the interior of the housing; The operating port is located on the side of the housing, the transmission rod is located inside the housing, and the unlocking hole is located on the first guide member so that the unlocking rod is slidably connected to the first guide member; The spring abuts against the stepped structure and the first guide member.

[0008] Optionally, it also includes a rotating shaft and two spacers. The rotating component is rotatably connected to the inner wall of the operating port via the rotating shaft. The two spacers are respectively disposed on both sides of the rotating component along the axial direction of the rotating shaft, so that the rotating component and the inner walls of the operating port on both sides along the axial direction of the rotating shaft are spaced apart.

[0009] Optionally, the spacer includes a plug-in portion and an abutment portion connected to the plug-in portion, wherein the cross-sectional area of ​​the abutment portion is larger than the cross-sectional area of ​​the plug-in portion; The rotating component has a mounting hole on its side along the axial direction of the rotating shaft. The insertion part is inserted into the mounting hole, and the abutting part is located on the outside of the rotating component and abuts against the inner wall of the operating port.

[0010] Optionally, the spacer includes a first sub-sleeve and a second sub-sleeve. The first sub-sleeve is sleeved on the rotating shaft, and the second sub-sleeve is connected to the rotating component and is spaced apart from the first sub-sleeve along the axial direction of the unlocking rod.

[0011] Optionally, a second guide member is also included, which is fixed to the inner wall of the mounting cavity and has a groove extending along the axial direction of the unlocking rod, with a portion of the unlocking rod accommodated within the groove.

[0012] Optionally, the transmission rod includes a main body and two connecting plates. The two connecting plates are connected to one side of the main body and are spaced apart to form a clamping space. One of the rotating member and the unlocking rod is rotatably connected to the main body, and the other is placed in the clamping space to be rotatably connected to the two connecting plates.

[0013] A second aspect of this application provides a headrest adjustment device, including an adjustment body, a locking structure, and an unlocking handle as described in any of the preceding claims; The adjustment body is used to install the head frame, and the locking structure is disposed inside the adjustment body and has a locked state and an unlocked state that restrict the movement of the adjustment body; The mounting end of the holding body is connected to the adjusting body, and the unlocking rod is connected to the locking structure in a transmission manner; When the unlocking lever is in the working position, the unlocking lever drives the locking structure to switch from the locked state to the unlocked state.

[0014] The technical solution provided in this application has the following advantages compared with the prior art: The unlocking handle provided in this application has a rotating component rotatably disposed within the operating port, with the rotating component exposed outside the operating port in the locked position. Pressing the rotating component to the unlock position drives the unlocking lever to move to the working position via a transmission rod, allowing the unlocking lever to unlock the headrest adjustment device. Stopping the pressing of the rotating component causes the elastic element to drive the unlocking lever back to its initial position, and the movement of the unlocking lever also causes the rotating component to return to the locked position. When a medical professional holds the main body with one hand, their fingers can naturally reach and press the exposed rotating component. This pressing force is precisely converted into a linear movement of the unlocking lever via the transmission rod, causing it to overcome the elastic force of the elastic element and reach the working position, thereby unlocking the adjustment device. Because the unlocking operation relies on the action of gripping the handle, the medical professional has already provided stable support for the headrest through the gripping main body at the moment of unlocking, without needing to spend extra time or use their hands to support the patient's head or stabilize the headrest before or during unlocking. When the adjustment is complete, the medical professional only needs to relax the grip, the pressure on the rotating component is released, and the unlocking lever automatically and reliably returns to its initial position under the drive of the elastic element, causing the adjustment device to lock instantly. This process requires no manual reset. The intuitive "grip to unlock, release to lock" logic integrates potentially interrupted multi-step procedures into a continuous, smooth motion. This significantly reduces the number of steps and reliance on multiple operators, while ensuring the continuity and efficiency of intraoperative head frame adjustments, thus providing strong support for surgical safety and success rates. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the unlocking handle described in an embodiment of this application; Figure 2 This is an exploded view of the unlocking handle described in the embodiments of this application; Figure 3 This is a schematic diagram of the internal structure of the unlocking handle described in an embodiment of this application; Figure 4 This is a schematic diagram of the unlocking lever described in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first guide member in an embodiment of this application; Figure 6This is a schematic diagram of the transmission rod described in an embodiment of this application; Figure 7 This is a schematic diagram of the rotating component described in the embodiments of this application; Figure 8 This is a schematic diagram of the head frame adjustment device described in an embodiment of this application.

[0018] The components include: 1. Holding body; 11. Operating port; 12. Mounting end; 13. Unlocking hole; 14. Outer shell; 15. First guide component; 2. Rotating component; 21. Rotating shaft; 22. Spacer; 221. First sub-sleeve; 222. Second sub-sleeve; 3. Unlocking rod; 31. Main rod body; 32. End; 4. Transmission rod; 41. Main body; 42. Connecting plate; 43. Clamping space; 5. Elastic component; 6. Second guide component; 7. Adjusting body. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0021] In delicate surgeries such as neurosurgery, orthopedics, and plastic surgery, medical head frames are crucial for stabilizing the patient's head position, and their stability directly affects the success of the surgery and the patient's safety. To allow for flexible adjustment of the head posture during surgery to obtain the optimal surgical field of view and operating angle, the head frame is typically mounted on a dedicated adjustment device. This device securely fixes the head frame in position when locked and allows for multi-degree-of-freedom positional adjustment when unlocked.

[0022] Adjustment devices typically include a movable part with multiple mutually rotatable joints and a locking part. The locking part is located between the joints and, when locked, restricts relative rotation of the joints, keeping the headrest in a fixed position. When unlocked, the joints can rotate relative to each other to adjust the headrest position. The locking part usually has a button or lever; pressing the button or lever unlocks the locking part, and resetting the button or lever locks it again.

[0023] However, even when the headrest is unlocked, the patient's head still needs continuous and stable support to prevent significant head movement. When pressing the button or lever to unlock the adjustment device, medical staff need to support the patient's head beforehand or hold the headrest before pressing the button or lever to unlock it. After adjusting the headrest position, the button or lever needs to be manually reset to lock it. These operations are cumbersome and may even require multiple medical staff to work together, affecting surgical efficiency.

[0024] To solve the above problems, refer to Figures 1 to 8 As shown, the first aspect of this application provides an unlocking handle, including: a gripping body 1, with an internal mounting cavity, an operation port 11 on one side, and a mounting end 12 for connecting to an adjustment device of a head frame at one end, the mounting end 12 having an unlocking hole 13 communicating with the mounting cavity; a rotating member 2, rotatably disposed within the operation port 11, and movable between a locked position and an unlocked position; an unlocking rod 3, movably disposed within the unlocking hole 13, and movable between an initial position and a working position; a transmission rod 4, disposed within the mounting cavity, with both ends rotatably connected to the unlocking rod 3 and the rotating member 2 respectively; and an elastic member 5, disposed between the unlocking rod 3 and the inner wall of the mounting cavity, to drive the unlocking rod 3 to move toward the initial position; when the rotating member 2 is in the locked position, at least part of it is exposed outside the mounting cavity, and the unlocking rod 3 is in the initial position; when the rotating member 2 is pressed to move to the unlocked position, the rotating member 2 pushes the unlocking rod 3 to overcome the elastic force of the elastic member 5 and move to the working position via the transmission rod 4.

[0025] The unlocking handle rotatably houses the rotating component 2 within the operating port 11, with the rotating component 2 protruding from the operating port in the locked position. Pressing the rotating component 2 to the unlocking position drives the unlocking lever 3 to move to the working position via the transmission rod 4, allowing the unlocking lever to unlock the headrest adjustment device. Stopping the pressing of the rotating component 2 causes the elastic element to drive the unlocking lever 3 back to its initial position, and the movement of the unlocking lever 3 also drives the rotating component 2 back to the locked position. When a medical professional holds the main body with one hand, their fingers can naturally reach and press the exposed rotating component. This pressing force is precisely converted into a linear movement of the unlocking lever via the transmission rod, causing it to overcome the elastic force of the elastic element and reach the working position, thereby unlocking the adjustment device. Because the unlocking operation relies on the action of gripping the handle, the medical professional has already provided stable support for the headrest through the gripping main body at the moment of unlocking, without needing to spend extra time or use their hands to support the patient's head or stabilize the headrest before or during unlocking. Once the adjustment is complete, medical staff simply need to relax their grip, releasing the pressure on the rotating component. The unlocking lever, driven by the elastic element, automatically and reliably returns to its initial position, instantly locking the adjustment device. This process requires no manual reset. Through the intuitive operating logic of "grip to unlock, release to lock," multi-step operations that could otherwise interrupt the procedure are integrated into a continuous and smooth action. This not only significantly reduces the number of steps and the reliance on multiple people working together, but also ensures the continuity and efficiency of adjusting the headrest posture during surgery, providing strong support for surgical safety and success rates.

[0026] The gripping body 1 has a cylindrical structure with a hollow interior, serving as a mounting cavity. A cylindrical mounting cavity is formed axially within the gripping body 1. An opening 11 is provided on the radial side of the gripping body 1, which can be a rectangular opening along the axial direction of the gripping body 1. One axial end of the gripping body 1 is a mounting end 12, used to connect to the headrest adjustment device. This allows medical personnel to stabilize the headrest adjustment device's position by gripping the gripping body 1. The mounting end 12 can be threaded or have a pin hole along the radial direction of the gripping body 1 to facilitate the connection between the mounting end 12 and the headrest adjustment device.

[0027] The rotating component 2 is made of medical-grade plastic or medical-grade stainless steel. One side of it is curved to contact the hands of medical personnel, while the other side faces the mounting cavity. The rotating component 2 can be designed as a curved plate structure with a hollow interior to reduce its weight. The side of the rotating component 2 facing the mounting cavity can have an opening to allow one end of the transmission rod 4 to enter the interior of the rotating component 2, thereby improving the stability of the rotational connection between the transmission rod 4 and the rotating component 2.

[0028] In some embodiments, the unlocking handle further includes a rotating shaft 21 and two spacers 22. The rotating member 2 is rotatably connected to the inner wall of the operating port 11 via the rotating shaft 21. The two spacers 22 are respectively disposed on both sides of the rotating member 2 along the axial direction of the rotating shaft 21, so that the rotating member 2 and the inner walls of the operating port 11 on both sides along the axial direction of the rotating shaft 21 are spaced apart.

[0029] This design, with spacers 22, keeps the rotating component 2 spaced apart from the inner wall of the operating port 11, avoiding direct friction, significantly reducing rotational resistance, making the rotation of the rotating component 2 smoother and more flexible, requiring less effort from medical staff during pressing operations, and improving the feel and comfort of operation during surgery. Spacers 22 are provided on both sides of the rotating component 2 along the axial direction of the rotating shaft 21, allowing the two spacers 22 to limit the rotation of the rotating component 2 within the operating port 11, preventing axial movement or radial wobbling during rotation, ensuring the accuracy of the rotational action, and thus guaranteeing the linkage accuracy of the transmission rod 4 and the unlocking rod 3, making the unlocking and locking actions more reliable.

[0030] Specifically, the rotating shaft 21 is made of medical-grade stainless steel or medical-grade plastic and has an overall cylindrical structure. The rotating component 2 may have a rotating through hole, through which the rotating shaft 21 is movably inserted. The rotating shaft 21 is fixedly connected to the inner walls of both sides of the operating port 11, allowing the rotating component 2 to rotate relative to the holding body 1 around the rotating shaft 21. The rotating shaft 21 may be located at one end of the rotating component 2 near the mounting end 12, or it may be located at 2 / 3 of the length of the rotating component 2.

[0031] The spacer 22 can be made of medical-grade plastic or medical-grade rubber. The spacer 22 can be a sleeve structure, allowing it to be fitted onto the rotating shaft 21, and the spacer 22 abuts against the inner wall of the rotating component 2 and the operating port 11, so that the rotating component 2 and the inner wall of the operating port 11 are spaced apart from each other. Alternatively, the spacer 22 can be glued to the rotating component 2.

[0032] In some embodiments, the spacer 22 includes a plug-in portion and an abutment portion connected to the plug-in portion, the cross-sectional area of ​​the abutment portion being larger than the cross-sectional area of ​​the plug-in portion; the rotating member 2 has a mounting hole on its side along the axial direction of the rotating shaft 21, the plug-in portion is inserted into the mounting hole, and the abutment portion is located on the outside of the rotating member 2 and abuts against the inner wall of the operating port 11.

[0033] With this configuration, the plug-in part can be installed on the rotating part 2 by inserting it into the mounting hole, which simplifies the connection operation between the spacer 22 and the rotating part 2. The cross-sectional area of ​​the abutment part is larger than that of the plug-in part, and the abutment part contacts the inner wall of the operating port 11, which increases the contact area between the abutment part and the inner wall of the operating port 11, resulting in uniform pressure distribution, reducing local stress concentration, and reducing wear on the spacer 22.

[0034] Specifically, the insertion part has a cylindrical structure, and its dimensions are precisely matched with the mounting holes on the rotating part 2 to ensure a tight insertion and fixation. The abutment part has an annular boss structure, which is coaxially arranged with the insertion part. The diameter of the abutment part is larger than that of the insertion part, so that the abutment part and the insertion part form a stepped structure. The insertion part and the abutment part can be manufactured by integral molding in a mold, or they can be connected to each other by ultrasonic welding.

[0035] When the rotating component 2 is hollow, through holes are provided on both sides of the rotating component 2 along the axial direction of the rotating shaft 21 as mounting holes. The mounting holes on both sides can be coaxial or spaced apart. When the rotating component 2 is a solid structure, through holes are provided on the rotating component 2, and the through holes form mounting holes on both sides of the rotating component 2.

[0036] After the plug is inserted into the mounting hole, the abutting part is located on the outside of the rotating part 2. The plug abuts against the wall of the mounting hole, so that the plug and the mounting hole maintain a stable relative position through friction. When the rotating part 2 rotates, it drives the spacer 22 to move together.

[0037] In some embodiments, the spacer 22 includes a first sub-sleeve 221 and a second sub-sleeve 222. The first sub-sleeve 221 is sleeved on the rotating shaft 21, and the second sub-sleeve 222 is connected to the rotating member 2 and is spaced apart from the first sub-sleeve 221 along the axial direction of the unlocking rod 3.

[0038] This design, through the combination of the first sub-sleeve 221 and the second sub-sleeve 222, achieves multiple positioning of the rotating component 2. The first sub-sleeve 221 and the second sub-sleeve 222 ensure that each position of the rotating component 2 along the axial direction of the unlocking rod 3 is spaced from the inner wall of the operating port 11, further reducing the swaying amplitude of the rotating component 2, making the rotation process more stable and smooth, and providing a more comfortable and effortless pressing experience for medical staff. The dual positioning structure can effectively disperse the stress generated during rotation, reduce the wear of various components, extend the service life of the rotating component 2, the rotating shaft 21, and the spacer 22, and improve the durability and reliability of the entire unlocking handle.

[0039] Specifically, both the first sub-sleeve 221 and the second sub-sleeve 222 are made of medical-grade plastic or medical-grade rubber. The first sub-sleeve 221 and the second sub-sleeve 222 may both include an insertion part and an abutment part, or the first sub-sleeve 221 may be a sleeve structure, and the second sub-sleeve 222 may include an insertion part and an abutment part. A mounting hole corresponding to the second sub-sleeve 222 is provided in the middle of the rotating member 2.

[0040] The rotating shaft 21 can be optionally located at the end of the rotating member 2 along the axial direction of the unlocking rod 3. The first sub-sleeve 221 has a cylindrical structure and is sleeved on the rotating shaft 21. The second sub-sleeve 222 is connected to the middle position of the rotating member 2 along the axial direction of the unlocking rod 3, so that the first sub-sleeve 221 and the second sub-sleeve 222 are spaced apart on the rotating member 2.

[0041] The unlocking rod 3 is a straight rod structure. One end of the unlocking rod 3 is located inside the mounting cavity and is rotatably connected to the transmission rod 4, while the other end is on the outside of the holding body 1. After the transmission rod 4 is connected to the unlocking rod 3, the angle between the transmission rod 4 and the unlocking rod 3 needs to be greater than or less than 90° so that when the rotating part 2 is pressed, the force exerted by the rotating part 2 on the transmission rod 4 has a separation along the axial direction of the unlocking rod 3, so as to drive the unlocking rod 3 to slide axially. When the angle between the unlocking rod 3 and the transmission rod 4 is greater than 90°, pressing the rotating part 2 will push the unlocking rod 3 out of the mounting cavity, that is, the working position is located on the side away from the mounting cavity in the initial position. When the angle between the unlocking rod 3 and the transmission rod 4 is less than 90°, pressing the rotating part 2 will push the unlocking rod 3 to move in the direction of retracting into the mounting cavity, that is, the working position is located on the side close to the mounting cavity in the initial position.

[0042] The end of the unlocking lever 3 furthest from the mounting cavity is connected to the locking structure of the headstock adjustment device. The extension and retraction of the unlocking lever 3 relative to the holding body 1 drives the locking structure to lock and unlock. The elastic element 5 can be connected to the unlocking lever 3 by welding or by abutting. When the unlocking lever 3 moves to the working position, the elastic element 5 elastically deforms and accumulates elastic potential energy. When the pressing of the rotating part 2 stops, the elastic element 5 releases energy, driving the unlocking lever 3 back to its initial position.

[0043] In some embodiments, the side of the unlocking rod 3 is formed with a stepped structure, and the inner wall of the mounting cavity with the unlocking hole 13 serves as an abutment wall; the elastic member 5 includes a spring, which is sleeved on the unlocking rod 3 and abuts against the stepped structure and the abutment wall; when the unlocking rod 3 moves to the working position in a direction away from the mounting cavity, the spring deforms to accumulate elastic potential energy.

[0044] This design provides a stable base for the spring, which is then fitted onto the unlocking rod 3. Once the unlocking rod 3 is installed, the spring abuts against the stepped structure and the supporting wall, facilitating installation. The spring's fitted onto the unlocking rod 3 with both ends in contact ensures that the elastic force is transmitted axially along the unlocking rod 3, eliminating lateral forces and making the movement of the unlocking rod 3 smoother and more stable.

[0045] Specifically, the side of the unlocking rod 3 can be formed with an annular boss. The boss forms a stepped structure on the unlocking rod 3. The annular boss is coaxial with the unlocking rod 3. The side of the boss facing the contact surface is the stepped surface. The stepped surface is perpendicular to the axis of the unlocking rod 3 to ensure the contact effect of the stepped structure.

[0046] Alternatively, the side of the unlocking rod 3 can be machined to form an annular groove. The annular groove extends along the axial direction of the unlocking rod 3. One side of the annular groove along the axis of the unlocking rod 3 is in the mounting cavity, and the other side is in the unlocking hole 13, so that the groove wall on the side away from the abutment wall forms a stepped structure.

[0047] The spring is a medical compression spring. The diameter of the spring is larger than the diameter of the unlocking rod 3, so that the spring can be fitted onto the unlocking rod 3. The diameter of the spring is smaller than the diameter of the stepped structure, so that the end of the spring can abut against the stepped structure.

[0048] A spring is fitted onto the unlocking rod 3, with one end of the spring abutting against the stepped structure and the other end abutting against the abutting wall. When the unlocking rod 3 extends out of the unlocking hole 13, the stepped structure compresses the spring, causing the spring to accumulate elastic potential energy. Thus, after the pressing of the rotating part 2 stops, the spring releases the elastic potential energy and drives the unlocking rod 3 to return to its initial position.

[0049] In some embodiments, the unlocking rod 3 includes a main rod body 31 and an end 32. The main rod body 31 passes through the unlocking hole 13, and the end 32 is located at one end of the main rod body 31 located in the mounting cavity and is rotatably connected to the transmission rod 4. Along the radial direction of the unlocking hole 13, the size of the end 32 is larger than the size of the main rod 31, so that the end 32 and the main rod 31 form a stepped structure.

[0050] With this configuration, the stepped structure formed by the end 32 and the main rod 31 is easy to form, reducing the difficulty of production and manufacturing. At the same time, the flatness and verticality of the stepped surface are easier to control, ensuring good contact with the elastic element 5 and improving the stability of elastic force transmission.

[0051] Specifically, both the main rod 31 and the end cap 32 are made of medical-grade plastic or medical-grade stainless steel. The main rod 31 and end cap 32 can be integrally molded in a mold, or they can be connected by welding. The cross-sectional area of ​​the end cap 32 is larger than that of the main rod 31, forming an axial limit at the unlocking hole 13, effectively preventing the unlocking rod 3 from detaching from the mounting cavity during movement, thus improving the safety and reliability of the structure.

[0052] The main rod 31 has a cylindrical structure, and its dimensions are precisely matched with the dimensions of the unlocking hole 13 to ensure that it can be smoothly inserted into the unlocking hole 13 and achieve axial sliding. One end of the main rod 31 extends out of the unlocking hole 13 for transmission connection with the locking structure of the head frame adjustment device, and the other end is located in the mounting cavity and is fixedly connected to the end 32.

[0053] The end 32 is located at one end of the main rod 31 within the mounting cavity. The end 32 has a through hole that is radially perpendicular to the main rod 31. After the pin is inserted through the through hole of the end 32, the pin is connected to the transmission rod 4, so that the end 32 and the transmission rod 4 can be rotatably connected.

[0054] The end 32 can be a column structure, or it can include a disc and a mounting block. The disc is connected to the end of the main rod 31, and the mounting block is fixed to the side of the disc facing away from the main rod 31. A rotating through hole is provided on the mounting block.

[0055] The end 32 has a stepped surface on the side facing the abutting wall. The spring abuts against the end 32. When the main rod 31 extends out of the mounting cavity, the end 32 can compress the spring and store elastic potential energy. The diameter of the end 32 is larger than the diameter of the unlocking hole 13, thereby limiting the range of axial movement of the unlocking rod 3 and preventing the unlocking rod 3 from coming out of the mounting cavity.

[0056] Reference Figures 1 to 3 As shown, in some embodiments, the holding body 1 includes a housing 14 and a first guide 15. The first guide 15 is fixed to one end of the housing 14 and extends along the axial direction of the unlocking rod 3, with a portion of it entering the interior of the housing 14. The operating port 11 is located on the side of the housing 14, the transmission rod 4 is located inside the housing 14, and the unlocking hole 13 is located on the first guide member 15 so that the unlocking rod 3 is slidably connected to the first guide member 15; the spring abuts between the stepped structure and the first guide member 15.

[0057] This configuration provides precise and stable axial guidance for the unlocking rod 3, extending the guide length and effectively limiting the radial wobble of the unlocking rod 3. This makes the movement of the unlocking rod 3 smoother and more stable, significantly improving the accuracy of unlocking and locking actions and avoiding deviations caused by insufficient guidance. The first guide 15 also serves as both the unlocking hole 13 and the mounting end 12, resulting in a more rational structural layout, higher utilization of the internal space of the gripping body 1, and a more compact overall structure. The separate structure of the outer shell 14 and the first guide 15 facilitates processing and assembly, reducing production difficulty.

[0058] Specifically, the gripping body 1 consists of two parts: a shell 14 and a first guide member 15, both of which are made of medical-grade stainless steel or medical-grade plastic. The shell 14 can be a hollow cylindrical structure, so that the space inside the shell 14 serves as a mounting cavity; one end of the shell 14 is provided with a through hole.

[0059] The first guide member 15 includes a guide section and a skirt, both of cylindrical structure. The skirt is connected to the side of the guide section. The guide section extends along the axis of the unlocking rod 3 and passes through a through hole at the end of the housing 14, allowing a portion of the guide section to enter the mounting cavity. The skirt is located on the outside of the housing 14 and is fixedly connected to the housing 14 by bolts or welding. A through hole, serving as an unlocking hole 13, is provided at the center of the guide section. The unlocking rod 3 passes through the unlocking hole 13 on the guide section, allowing the unlocking rod 3 to slide along the axis of the unlocking hole 13 to extend or retract into the housing.

[0060] The transmission rod 4 is located inside the housing 14, i.e., within the mounting cavity. The elastic element 5 is a medical compression spring, which is sleeved on the unlocking rod 3 and abuts against the end face of the unlocking rod 3 and the guide portion of the first guide member 15 located in the mounting cavity. The unlocking rod 3 moves relative to the first guide member 15 between an initial position and a working position. When the unlocking rod 3 is in the initial position, the spring can be selected to be in a compressed state.

[0061] The transmission rod 4 is made of medical-grade stainless steel or medical-grade plastic and has an overall rod-shaped structure. It has rotating connection holes at both ends, which are connected to the unlocking rod 3 and the rotating part 2 by means of a pin.

[0062] Reference Figure 6 In some embodiments, the transmission rod 4 includes a main body 41 and two connecting plates 42. The two connecting plates 42 are connected to one side of the main body 41 and are spaced apart to form a clamping space 43. One of the rotating member 2 and the unlocking rod 3 is rotatably connected to the main body 41, and the other is placed in the clamping space 43 to be rotatably connected to the two connecting plates 42.

[0063] With this configuration, the clamping space 43 formed by the two connecting plates 42 makes the connection between the transmission rod 4 and the unlocking rod 3 or the rotating part 2 more stable, and the force transmission more uniform. It avoids uneven force and lateral force caused by unilateral connection, and ensures that the axial movement of the unlocking rod 3 is accurate, without deviation or jamming.

[0064] Specifically, the transmission rod 4 is made of medical-grade stainless steel or medical-grade plastic, and consists of a main body 41 and two connecting plates 42. The three parts can be integrally formed or connected by welding.

[0065] The main body 41 is a block structure, and the two connecting plates 42 are parallel plate structures. The two connecting plates 42 are connected to one side of the main body 41 and are spaced apart so that the space between the two connecting plates 42 forms a clamping space 43. The size of the clamping space 43 is adapted to the size of the rotating member 2 or the unlocking rod 3 to ensure that the rotating member 2 or the unlocking rod 3 can enter the clamping space 43.

[0066] The main body 41 is rotatably connected to the rotating part 2 via a shaft, and the two connecting plates 42 are rotatably connected to the unlocking rod 3 via a shaft, or the main body 41 is rotatably connected to the unlocking rod 3, and the two connecting plates 42 are rotatably connected to the rotating part 2 via a shaft.

[0067] When the interior of the rotating part 2 is hollow and an opening is formed on one side, through holes and screw holes can be respectively provided on two opposite side walls of the rotating part 2. The through holes and screw holes are coaxially arranged. The main body 41 enters the interior of the rotating part 2 through the opening, and the rotating through hole on the main body 41 is coaxial with the through hole and screw hole of the rotating part 2. A first bolt is used to pass through the through hole and the rotating through hole and threadedly connected to the screw hole to rotate the main body 41 and the rotating part 2.

[0068] The first bolt may have a smooth section and a threaded section. The threaded section is located on the side of the smooth section away from the head of the first bolt. The threaded section is threadedly connected to the screw hole of the rotating part 2. The smooth section corresponds to the through hole of the rotating part 2 and the rotation through hole of the main body 41 to reduce the resistance of the main body 41 rotating around the first bolt.

[0069] Two connecting plates 42 are respectively provided with coaxial mounting through holes and threaded holes. The end of the unlocking rod 3 is provided with a connecting through hole and enters the clamping space 43. When the unlocking rod 3 includes the end 32 and the main rod body 31, the end 32 enters the clamping space 43. The connecting through hole is on the end 32. The connecting through hole on the unlocking rod 3 is coaxial with the mounting through hole and the threaded hole. A second bolt is used to pass through the mounting through hole and the connecting through hole to connect with the threaded hole so that the unlocking rod 3 can rotate around the second bolt.

[0070] The second bolt may have a smooth section and a threaded section. The threaded section is located on the side of the smooth section away from the head of the second bolt. The threaded section is threadedly connected to the screw hole of the rotating part 2. The smooth section corresponds to the through hole of the rotating part 2 and the rotation through hole of the main body 41 to reduce the resistance of the main body 41 rotating around the second bolt.

[0071] Reference Figure 2 and Figure 3 As shown, in some embodiments, the unlocking handle further includes a second guide 6, which is fixed to the inner wall of the mounting cavity and has a sliding groove that extends axially along the unlocking rod 3, with a portion of the unlocking rod 3 housed within the sliding groove.

[0072] With this configuration, the second guide 6 and the unlocking hole 13 provide dual guidance for the unlocking rod 3, further limiting the radial sway of the unlocking rod 3 and ensuring that the axial movement of the unlocking rod 3 is more stable and precise. The tight fit between the slide and the unlocking rod 3 can effectively disperse the lateral force on the unlocking rod 3 during movement, reduce the wear between the unlocking rod 3 and the unlocking hole 13, and improve the durability of the entire unlocking handle.

[0073] Specifically, the second guide member 6 is made of medical-grade stainless steel or medical-grade plastic, and has a plate-like or block-like structure. The second guide member 6 is connected to the inner wall of the mounting cavity along the radial direction of the unlocking rod 3. The side of the second guide member 6 facing the unlocking rod 3 is recessed to form a groove as a sliding groove. The sliding groove passes through the second guide member 6 along the axial direction of the unlocking rod 3; a portion of the unlocking rod 3 facing the second guide member 6 is placed in the sliding groove, so that the sliding groove can constrain the sliding direction of the unlocking rod 3.

[0074] When the unlocking lever 3 includes an end 32 and a main body 31, a portion of the end 32 is placed in a groove to prevent the groove from affecting the extension and contraction of the spring.

[0075] Reference Figure 8 As shown, a second aspect of this application provides a headrest adjustment device, including an adjustment body 7, a locking structure, and an unlocking handle as described in any of the preceding claims; the adjustment body 7 is used to mount the headrest, the locking structure is disposed within the adjustment body 7, and has a locked state and an unlocked state that restrict the movement of the adjustment body 7; the mounting end 12 of the gripping body 1 is connected to the adjustment body 7, and the unlocking rod 3 is drively connected to the locking structure; when the unlocking rod 3 is in the working position, the unlocking rod 3 drives the locking structure to switch from the locked state to the unlocked state.

[0076] Specifically, the main adjustment body 7 includes a base, a rotating arm assembly, and a fixing component. The fixing component is used to securely connect the head frame, and the rotating arm assembly is connected between the base and the fixing component. A locking structure is provided on the rotating arm assembly. When the locking structure is locked, the rotation of the rotating arm assembly is restricted, keeping the position of the head frame fixed. When the locking structure is unlocked, the rotating arm assembly can rotate freely, thereby driving the head frame to rotate relative to the base.

[0077] The rotating arm assembly includes a cylindrical body; the locking structure includes two locking components; the two locking components are respectively installed at both ends of the cylindrical body; one end of the rotating structure of the locking component closer to the fixed component is fixedly connected to the cylindrical body, and the other end is fixedly connected to the fixed component; one end of the rotating structure of the locking component farther from the fixed component is fixedly connected to the cylindrical body, and the other end is fixedly connected to the base; a fan-shaped rotating component is rotatably connected to the fixed component; the unlocking handle is connected to the fixed component, and the unlocking rod 3 is connected to the fan-shaped rotating component; the unlocking part of the locking component closer to the fixed component is connected to the unlocking rod 3 through the fan-shaped rotating component.

[0078] The locking component includes a first joint, a second joint, a first latching member, a second latching member, a spring, and a movable shaft. The first and second joints are rotatably connected and both are sleeved on the movable shaft. The first latching member is fixed to the side of the first joint facing the second joint, and the second latching member is movably disposed between the first and second joints and fixedly connected to the movable shaft. The movable shaft is connected to the second latching member and has a limiting fit with the second joint to restrict the rotation of the second joint relative to the movable shaft. The spring is connected between the second latching member and the second joint to drive the second latching member to latch and lock with the first latching member. One end of the movable shaft is the unlocking end, and the other end is the transmission end. The unlocking end is forced to drive the second latching member to overcome the elastic force of the spring and separate from the first latching member to unlock the locking component. The unlocking end of one locking component is connected to a fan-shaped rotating member, and the transmission end is connected to the unlocking end of the other locking component so that when the unlocking rod 3 pushes one movable shaft to move through the fan-shaped rotating member, the other movable shaft moves synchronously. The two locking elements can be locked and unlocked simultaneously; when both locking elements are unlocked, the cylinder can rotate relative to the base and the fixing element through the first and second joints of the two locking elements, respectively.

[0079] Locking devices can be installed at both ends of the cylindrical component using bolts, or the cylindrical component can be a hollow cylindrical tubular structure with two circular rotating holes on its side. The axes of the two rotating holes are parallel to each other and perpendicular to the axial direction of the cylindrical component. The two locking devices are coaxially installed in the two rotating holes respectively.

[0080] Both the first joint and the second joint are stepped cylindrical structures. The first joint and the second joint are provided with mating holes in the middle. The side of the first joint facing the second joint is recessed to form a first mounting groove that communicates with the corresponding mating hole. The side of the second joint facing the first joint is recessed to form a second mounting groove that communicates with the corresponding mating hole. After the first joint and the second joint are rotatably connected, the two mating holes are coaxial.

[0081] The movable shaft passes through two mating holes, allowing both the first and second joints to move axially relative to the movable shaft. The movable shaft has a stop block on its side, and the second joint has a stop groove. The stop block is inserted into the stop groove to restrict the rotation of the second joint relative to the movable shaft. The movable shaft can be fixedly connected to the second snap-fit ​​member by bolts or welding.

[0082] Both the first and second locking components are annular structures. The first locking component is fixed in the first mounting groove, and the second locking component is disposed in the second mounting groove. Each of the first and second locking components has locking teeth on its opposite side. When the first and second locking components are engaged, the first joint cannot rotate relative to the second locking component; that is, the first and second joints cannot rotate relative to each other. When the first and second locking components are disengaged, the first joint can rotate relative to the second joint.

[0083] The cylindrical component has a transmission cavity, which contains a moving rod and two sector-shaped components. The two sector-shaped components are rotatably mounted in the transmission cavity at two rotating holes. The moving rod is positioned between the two sector-shaped components and is rotatably connected to the two sector-shaped components, so that when one sector-shaped component rotates, it drives the other sector-shaped component to rotate through the moving rod.

[0084] The movable shaft has an unlocking end at the end of the first joint away from the second joint, and a transmission end at the other end. The second joint of the locking member near the fixed member is connected to the cylindrical member, and the first joint is connected to the fixed member, so that the unlocking end is outside the transmission cavity and connected to the fan-shaped rotating part of the fixed member. The transmission end is inside the transmission cavity and connected to a fan-shaped part. The second joint of the locking member away from the fixed member is connected to the cylindrical member, and the first joint is connected to the base, so that the unlocking end is inside the transmission cavity and connected to another fan-shaped part.

[0085] The second joint of a locking member near the fixed member is fixedly connected to the cylindrical member, and the first joint is connected to the fixed member, with the unlocking end facing the fixed member. The first joint of a locking member away from the fixed member is fixedly connected to the cylindrical member, and the second joint is fixedly connected to the base, with the unlocking end facing the cylindrical member to connect with the transmission end of the locking member near the fixed member.

[0086] The fan-shaped rotating component can be rotatably connected to the fixed component. One end of the fan-shaped rotating component along the circumference of the rotating shaft is rotatably connected to the unlocking rod 3, and the other end is rotatably connected to the unlocking end of the movable shaft. When the unlocking rod 3 extends to the working position, it pushes the fan-shaped rotating component to rotate, thereby pushing the unlocking end to move and causing the first locking component and the second locking component to separate from each other.

[0087] When the unlocking rod 3 moves relative to the fixed part, and applies force to the unlocking end of the locking part near the fixed part through the fan-shaped rotating part, the movable shaft of the locking part near the fixed part moves toward the transmission cavity, thereby causing the second locking part and the first locking part to separate from each other, so that the cylindrical part can rotate relative to the fixed part; simultaneously, the movable shaft of the locking part near the fixed part moves toward the transmission cavity, causing the movable shaft to push one fan-shaped part to rotate, and causing the moving rod to drive the other fan-shaped part to rotate, so that the unlocking end of the locking part away from the fixed part is also subjected to force, realizing the synchronous unlocking of the two locking parts. At this time, the cylindrical part can also rotate relative to the base, so that the fixed part can flexibly adjust its position relative to the base.

[0088] When the unlocking end is not subjected to force, the springs in the two locking parts drive their respective second locking parts to engage with the corresponding first locking parts, thereby restricting the rotation of the first joint and the second locking part of the two locking parts, so that the cylinder part cannot rotate relative to the base and the cylinder part cannot rotate relative to the fixed part, thus keeping the position of the fixed part stable.

[0089] In specific use, the unlocking handle and headrest adjustment device provided in this application embodiment are connected to the mounting end 12 of the holding body 1 and the fixing part of the adjustment body 7, and the unlocking rod 3 is connected to the unlocking end of a locking part.

[0090] When medical staff press the rotating component 2, the rotating component 2 rotates around the rotating shaft 21, pushing the unlocking rod 3 to move through the transmission rod 4. The unlocking rod 3 extends out of the mounting cavity and moves to the working position. At this time, the end 32 compresses the spring, allowing the spring to store energy. The unlocking rod 3 overcomes the elastic force of the elastic component 5 and slides smoothly in the slide groove to the working position, causing the unlocking rod 3 to push the movable shafts of the two locking components to move, thus unlocking the adjustment body 7. Medical staff can then hold the unlocking handle to move the position of the headrest on the adjustment body 7.

[0091] When the finger pressing the rotating part 2 is released, the elastic element 5 releases energy, driving the unlocking lever 3 to move towards the mounting cavity. The unlocking lever 3 returns to its initial position axially, and simultaneously pushes the rotating part 2 back to the locked position via the transmission rod 4. At this time, the movable shaft resets, locking the two locking elements, and the adjusting body 7 is in the locked state to fix the position of the head frame.

[0092] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An unlocking handle, characterized in that, include: The holding body (1) has an internal mounting cavity, an operation port (11) on one side, and a mounting end (12) for connecting to the head frame adjustment device at one end. The mounting end (12) has an unlocking hole (13) that communicates with the mounting cavity. The rotating component (2) is rotatably disposed within the operating port (11) and can move between the locked position and the unlocked position; The unlocking rod (3) is movably inserted into the unlocking hole (13) and can move between the initial position and the working position; The transmission rod (4) is located in the mounting cavity, and its two ends are rotatably connected to the unlocking rod (3) and the rotating part (2) respectively; An elastic element (5) is disposed between the unlocking rod (3) and the inner wall of the mounting cavity to drive the unlocking rod (3) to move toward the initial position; When the rotating member (2) is in the locked position, it is at least partially exposed in the mounting cavity, and the unlocking rod (3) is in the initial position; when the rotating member (2) is pressed to move to the unlocking position, the rotating member (2) pushes the unlocking rod (3) through the transmission rod (4) to overcome the elastic force of the elastic member (5) and move to the working position.

2. The unlocking handle according to claim 1, characterized in that, The side of the unlocking rod (3) has a stepped structure, and the inner wall of the mounting cavity with the unlocking hole (13) serves as an abutment wall. The elastic element (5) includes a spring, which is sleeved on the unlocking rod (3) and abuts against the stepped structure and the abutting wall; When the unlocking lever (3) moves toward the working position in a direction away from the mounting cavity, the spring deforms to accumulate elastic potential energy.

3. The unlocking handle according to claim 2, characterized in that, The unlocking rod (3) includes a main rod body (31) and an end (32). The main rod body (31) is inserted into the unlocking hole (13). The end (32) is located at one end of the main rod body (31) within the mounting cavity and is rotatably connected to the transmission rod (4). Along the radial direction of the unlocking hole (13), the size of the end (32) is larger than the size of the main rod (31), so that the end (32) and the main rod (31) form the stepped structure.

4. The unlocking handle according to claim 2 or 3, characterized in that, The holding body (1) includes a shell (14) and a first guide (15). The first guide (15) is fixed to one end of the shell (14). The first guide (15) extends along the axial direction of the unlocking rod (3) and a portion of it enters the interior of the shell (14). The operating port (11) is located on the side of the housing (14), the transmission rod (4) is located inside the housing (14), and the unlocking hole (13) is located on the first guide (15) so that the unlocking rod (3) is slidably connected to the first guide (15). The spring abuts between the stepped structure and the first guide (15).

5. The unlocking handle according to claim 1, characterized in that, It also includes a rotating shaft (21) and two spacers (22). The rotating member (2) is rotatably connected to the inner wall of the operating port (11) through the rotating shaft (21). The two spacers (22) are respectively disposed on both sides of the rotating member (2) along the axial direction of the rotating shaft (21) so that the rotating member (2) and the operating port (11) are spaced apart on both sides of the inner wall along the axial direction of the rotating shaft (21).

6. The unlocking handle according to claim 5, characterized in that, The spacer (22) includes a plug-in portion and an abutment portion connected to the plug-in portion, wherein the cross-sectional area of ​​the abutment portion is larger than the cross-sectional area of ​​the plug-in portion; The rotating part (2) has a mounting hole on the side along the axial direction of the rotating shaft (21), the insertion part is inserted into the mounting hole, and the abutting part is located on the outside of the rotating part (2) and abuts against the inner wall of the operating port (11).

7. The unlocking handle according to claim 5, characterized in that, The spacer (22) includes a first sub-sleeve (221) and a second sub-sleeve (222). The first sub-sleeve (221) is sleeved on the rotating shaft (21), and the second sub-sleeve (222) is connected to the rotating member (2) and is spaced apart from the first sub-sleeve (221) along the axial direction of the unlocking rod (3).

8. The unlocking handle according to any one of claims 1 to 3, characterized in that, It also includes a second guide (6), which is fixed to the inner wall of the mounting cavity and has a groove. The groove extends along the axial direction of the unlocking rod (3), and a portion of the unlocking rod (3) is accommodated in the groove.

9. The unlocking handle according to any one of claims 1 to 3, characterized in that, The transmission rod (4) includes a main body (41) and two connecting plates (42). The two connecting plates (42) are connected to one side of the main body (41) and are spaced apart to form a clamping space (43). One of the rotating member (2) and the unlocking rod (3) is rotatably connected to the main body (41), and the other is placed in the clamping space (43) to be rotatably connected to the two connecting plates (42).

10. A headframe adjustment device, characterized in that, Includes the adjusting body (7), the locking structure, and the unlocking handle as described in any one of claims 1 to 9; The adjustment body (7) is used to install the head frame, and the locking structure is disposed inside the adjustment body (7) and has a locked state and an unlocked state that restrict the movement of the adjustment body (7); The mounting end (12) of the holding body (1) is connected to the adjusting body (7), and the unlocking rod (3) is connected to the locking structure in a transmission manner; When the unlocking lever (3) is in the working position, the unlocking lever (3) drives the locking structure to switch from the locked state to the unlocked state.

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