Clamping device for a bedside rail

Abstract

The application relates to the technical field of medical devices, and provides a clamping device for a bedside attached rail, a base assembly and a clamping mechanism; the clamping mechanism comprises a movable piece, an intermediate piece and a driving piece; the movable piece, the intermediate piece and the driving piece are respectively rotationally connected to form a linkage structure, and the base assembly is provided with a protruding part; the movable piece is matched with the protruding part during movement and is used for clamping the attached rail. In this way, the clamping device adopts a linkage mode to clamp the attached rail, the clamping force of the structure is controllable, the damage to the attached rail is small, and the clamping device is simple to operate and requires a small operation space.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a clamping device for bedside rails. Background Technology

[0002] In the medical field, it is often necessary to fix accessories such as lead curtains, trays, and control panels to rails beside operating tables or hospital beds. When adding accessories, they are usually connected to the rails via connecting devices.

[0003] Currently, there are usually two types of connection methods for connecting devices: one is a fixed type, and the other is a movable type.

[0004] For non-movable connecting devices, they are typically fitted onto the bedside rail in a modular fashion. This involves attaching the connecting device to the bedside rail from one end and then moving it along the rail to the target installation position. During this process, all components on the bedside rail corresponding to the locations traversed by the connecting device must be removed to avoid interference. This connection method is relatively inconvenient.

[0005] For movable connecting devices, the connecting device is usually a clamping structure. Its clamping part is usually cam-type or threaded type. The cam-type clamping structure opens or closes by rotating its cam. After a certain number of disassembly and assembly cycles, the cam part will wear to varying degrees, thus affecting the clamping force. As for the threaded clamping structure, its operation is cumbersome. On the one hand, it requires tools and a large operating space in situations where high clamping force is required. On the other hand, the clamping structure of this type is prone to over-clamping, which can lead to deformation of the auxiliary rail.

[0006] Therefore, this invention proposes a clamping device for bedside rails. The clamping device uses a linkage mechanism to clamp the rails. This structure has controllable clamping force, causes less damage to the rails, is simple to operate, and requires less operating space. Summary of the Invention

[0007] The purpose of this invention is to provide a clamping device for bedside rails; the clamping device uses a multi-component rotation linkage to clamp the rails, the clamping force is controllable, the damage to the rails is small, the operation is simple, and the required operating space is small.

[0008] This invention provides a clamping device for bedside rails, comprising a base assembly and a clamping mechanism; the clamping mechanism includes a movable member, an intermediate member, and an active member; the movable member has a first connecting position, a second connecting position, and a clamping portion; the intermediate member has a third connecting position and a fourth connecting position; the active member has a fifth connecting position and a sixth connecting position and a driving portion; the first connecting position is rotatably connected to the fifth connecting position, the second connecting position is rotatably connected to the base assembly, the third connecting position is rotatably connected to the base assembly, and the fourth connecting position is rotatably connected to the sixth connecting position, and the rotation axes of the above connecting positions are parallel; the driving portion is used to drive the active member to rotate and to link the movable member and the intermediate member; the base assembly has a protrusion; the movable member has at least a clamping state and an open state when moving with the active member; when the movable member is in the clamping state, the clamping portion is close to the protrusion; when the movable member is in the open state, the clamping portion is away from the protrusion.

[0009] The aforementioned bedside rail clamping device is designed as a linkage structure, which has a dead point position during its movement, thus naturally limiting the maximum clamping force and helping to avoid over-clamping, thereby improving the deformation of the rail caused by over-clamping. Furthermore, this linkage structure only requires driving the active component to swing, which can be hand-operated without tools, making it convenient and facilitating quick clamping and release of the rail. Additionally, the linkage movement mode of each component can be adjusted by adjusting the length and connection position between the first and second connecting positions, between the third and fourth connecting positions, and between the fifth and sixth connecting positions. This allows adjustment of the swing angle required by the active component during the transition from the open state to the clamping state. This structure can control the swing angle of the active component below 45°, helping to reduce the operating space required during the operation of the bedside rail clamping device.

[0010] Optionally, the clamping mechanism further includes a locking block and an elastic element. The locking block is movably disposed on the clamping part, and the elastic element provides elastic force to the locking block along its direction of movement. When the movable part is in the clamping state, the locking block is used to cooperate with the protrusion to clamp the auxiliary rail.

[0011] Optionally, the protrusion has a clamping groove for inserting one side of the wing plate of the auxiliary rail, and the locking block is used to abut against the other side of the wing plate of the auxiliary rail.

[0012] Optionally, the active component includes an active part and a handle, the fifth connecting position and the sixth connecting position are located on the active part, the handle is rotatably engaged with the active part, and the rotation axis of the handle is set at an angle to the rotation axis of the fifth connecting position.

[0013] Optionally, the rotation axis of the handle is perpendicular to the rotation axis of the fifth connection position.

[0014] Optionally, the movable member is configured such that when the movable member is in the clamping state, the movable member, the intermediate member, and the active part do not interfere with the rotation path of the handle.

[0015] Optionally, the handle has a locked position when it rotates relative to the active part, and the handle and the moving part form a mechanical interlock relationship;

[0016] The mechanical interlock relationship is configured such that when the movable part swings toward the open state, the intermediate part, the active part, and the handle work together to make the handle swing toward the side closer to the movable part, so as to prevent the movable part from continuing to swing toward the open state.

[0017] Optionally, when the handle is rotated to the locked position, the movable member, the intermediate member, and the active part are located between the base assembly and the handle.

[0018] Optionally, the movable component includes a first movable part and a second movable part, the first movable part and the second movable part are arranged at an angle, the clamping part is disposed on the second movable part, and when the movable component is in the clamping state and the handle is rotated to the locking position, the handle is parallel to the second movable part.

[0019] Optionally, a mounting groove is provided on one side of the base assembly. When the movable member is in the clamping state, at least a portion of the movable member, the intermediate member, and the active member are located in the mounting groove, and the clamping portion extends out of the mounting groove through the opening of the mounting groove.

[0020] In summary, the clamping device for bedside rails includes a base assembly and a clamping mechanism; the clamping mechanism includes a movable member, an intermediate member, and an active member; the movable member has a first connecting position, a second connecting position, and a clamping portion; the intermediate member has a third connecting position and a fourth connecting position; the active member has a fifth connecting position and a sixth connecting position, and a driving portion; the first connecting position is rotatably connected to the fifth connecting position, the second connecting position is rotatably connected to the base assembly, the third connecting position is rotatably connected to the base assembly, and the fourth connecting position is rotatably connected to the sixth connecting position, and the rotation axes of the above connecting positions are parallel; the driving portion is used to drive the active member to rotate and to link the movable member and the intermediate member; the base assembly has a protrusion; the movable member has at least a clamping state and an open state when it moves with the active member; when the movable member is in the clamping state, the clamping portion is close to the protrusion; when the movable member is in the open state, the clamping portion is away from the protrusion.

[0021] With this configuration, the clamping device for the bedside rail is a linkage structure. Its movement has a dead point, thus naturally limiting the maximum clamping force and helping to avoid over-clamping, thereby mitigating rail deformation caused by over-clamping. Furthermore, this linkage structure only requires driving the active component to swing, which can be hand-operated without tools, making it convenient and facilitating quick clamping and release of the rail. Additionally, the linkage movement of each component can be adjusted by regulating the length and connection position between the first and second connecting positions, the third and fourth connecting positions, and the fifth and sixth connecting positions. This allows for adjustment of the swing angle required by the active component during the transition from the open to the clamping state. This structure can control the swing angle of the active component below 45°, helping to reduce the operating space required for the bedside rail clamping device.

[0022] The aforementioned bedside rail clamping device can adjust the transmission ratio from the drive unit to the moving part by adjusting the relative positional relationship between each connection position and the position of the clamping part. This helps to maintain a larger transmission ratio and thus ensure a better force amplification effect. For example, this structure can make the clamping force F2 of the moving part about 20 times the force F1 acting on the drive unit, i.e., F2≈20F1. Therefore, this clamping structure can also be applied to occasions where high clamping force is required.

[0023] The aforementioned bedside rail clamping device uses a swing motion to switch between the open and clamping states. This swing motion prevents the movement from causing significant wear during frequent clamping, unlike cam-driven structures. Therefore, it has a smaller impact on the clamping force over long-term use, helping to ensure a longer service life and a more stable clamping effect. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a clamping device for bedside rails according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the clamping mechanism according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the clamping device for bedside rails in an open state according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the clamping device for bedside rails in a clamping state according to an embodiment of the present invention.

[0028] Figure 5This is a schematic diagram of the clamping device for a bedside rail according to another embodiment of the present invention.

[0029] The reference numerals in the attached figures are as follows:

[0030] 10-Base assembly; 11-Protrusion; 111-Clamping groove; 12-Clamping seat; 13-Fixing seat; 14-Mounting groove; 15-Notch;

[0031] 20-Clamping mechanism;

[0032] 21-Moving part; 211-First connecting position; 212-Second connecting position; 213-Clamping part; 214-First moving part; 2141-Assembly slot; 215-Second moving part;

[0033] 22 - Middleware; 221 - Third connector; 222 - Fourth connector;

[0034] 23-Active component; 231-Fifth connection position; 232-Sixth connection position; 233-Drive unit; 234-Active unit; 235-Handle;

[0035] 24-Locking block; 241-Beveled surface;

[0036] 25-Elastic element; 26-Damping adjustment screw; 27-Elastic washer; 28-Disc spring;

[0037] 30-Sub-rail. Detailed Implementation

[0038] The clamping device for bedside rails proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0039] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the terms “at least two” or “more than” are generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Additionally, as used in this invention, “installed,” “connected,” “linked,” and “set” on one element from another should be interpreted broadly, generally indicating only a connection, coupling, mating, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. This connection, coupling, mating, or transmission should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located arbitrarily inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0040] In the medical field, it is often necessary to fix accessories such as lead curtains, trays, and control panels to rails beside operating tables or hospital beds. When adding accessories, they are usually connected to the rails via connecting devices.

[0041] Currently, there are usually two types of connection methods for connecting devices: one is a fixed type, and the other is a movable type.

[0042] For non-movable connecting devices, the connecting device is usually fitted onto the bedside rail in a sleeve manner. That is, the connecting device is sleeved onto the bedside rail from one end, and then the connecting device is moved along the bedside rail to the target installation position. Other parts of the connecting device need to be removed at the location where the connecting device passes the bedside rail to avoid interference with the connecting device. This connection method is relatively inconvenient.

[0043] For movable connecting devices, the connecting device is a clamping structure, and its clamping part is usually cam-type or threaded type. The cam-type clamping structure drives the clamping structure to open or close by rotating its cam. After a certain number of disassembly and assembly cycles, the cam part will wear to varying degrees, thus affecting the clamping force. As for the threaded clamping structure, its operation is cumbersome. On the one hand, it requires tools to operate in situations where high clamping force is required, and it requires a large operating space. On the other hand, the clamping structure of this type is prone to over-clamping, causing deformation of the auxiliary rail.

[0044] Therefore, this invention proposes a clamping device for bedside rails. The clamping device uses a linkage mechanism to clamp the rails. This structure has controllable clamping force, causes less damage to the rails, is simple to operate, and requires less operating space.

[0045] Example 1:

[0046] This embodiment provides a clamping device for bedside rails;

[0047] The bedside rail clamping device includes a base assembly 10 and a clamping mechanism 20;

[0048] The clamping mechanism 20 includes a movable component 21, an intermediate component 22, and an active component 23;

[0049] The movable part 21 has a first connecting position 211, a second connecting position 212 and a clamping part 213;

[0050] The middleware 22 has a third connection bit 221 and a fourth connection bit 222;

[0051] The active component 23 has a fifth connection position 231, a sixth connection position 232, and a driving part 233;

[0052] The first connecting position 211 is rotatably connected to the fifth connecting position 231, the second connecting position 212 and the third connecting position 221 are rotatably connected to the base assembly 10, the fourth connecting position 222 is rotatably connected to the sixth connecting position 232, and the rotation axes of the above connecting positions are parallel; each connecting position here refers to the first connecting position 211, the second connecting position 212, the third connecting position 221, the fourth connecting position 222, the fifth connecting position 231 and the sixth connecting position 232, that is, the rotation axes of the six connecting positions are arranged in parallel, and each connecting position can be rotatably connected through a rotating shaft. The connection method is existing technology and will not be described in detail here.

[0053] The drive unit 233 is used to apply force to drive the active member 23 to rotate and to link the movable member 21 and the intermediate member 22. The drive unit 233 can be forceped by an external device, such as a motor or hydraulic structure. Considering that the bedside rail clamping device is used at the operating table or hospital bedside, its application scenario is relatively simple. Based on the actual usage requirements of its application scenario, in this embodiment, the drive unit 233 is manually force-applied, for example, by gripping to drive the active member 23 to rotate, thereby linking the movable member 21 and the intermediate member 22.

[0054] The base assembly 10 has a protrusion 11; the movable member 21 has at least a clamping state and an open state when it moves with the active member 23; when the movable member 21 is in the clamping state, the clamping part 213 moves close to the protrusion 11 to clamp the auxiliary rail 30; when the movable member 21 is in the open state, the clamping part 213 moves away from the protrusion 11 to release the clamping of the auxiliary rail 30.

[0055] Please refer to Figures 1 to 4 As shown, in this embodiment, when the clamping device of the bedside rail clamps the bedside rail, the protrusion 11 is preferably located above the clamping mechanism 20, and the rotation axis of each connection position is horizontal (the rotation axis is along the bedside rail). Figure 2 (Perpendicular to the paper). The active member 23 swings vertically. When a force is applied to the driving part 233 of the active member 23, the active member 23 is driven to swing. The clamping part 213 of the movable member 21 swings vertically adaptively to move closer to or away from the protrusion 11. In essence, the movable member 21 and the clamping part 213 constitute the frame of the clamping structure.

[0056] Please combine Figures 2 to 4As shown, in this embodiment, the clamping device for the bedside rail is configured as a linkage structure. When the driving member 23 is driven to swing upwards, the movable member 21 and the intermediate member 22 are linked, driving the movable member 21 to move towards the clamping state. The transmission ratio between the driving member 23 and the movable member 21 changes with the position of the driving member 23. When the clamping mechanism 20 is infinitely close to its dead point, the transmission ratio between the driving member 23 and the movable member 21 reaches its minimum, and the movable member 21 moves towards the protrusion 11 to its closest position. At this point, the force-increasing effect of the clamping device reaches its maximum, and the movable member 21 and the protrusion 11 together clamp the bedside rail 30. Subsequently, as the driving member 23 continues to swing upwards, the clamping mechanism 20 passes the dead point, and the transmission direction between the driving member 23 and the movable member 21 reverses, causing the driving member 23 to continue moving upwards, achieving a natural locking effect. Therefore, the position of the movable member 21 in the clamping state preferably corresponds to the position just passing the dead point during the movement of the clamping mechanism 20 from the open state of the movable member 21 to the clamping state. At this time, the transmission direction between the driving member 23 and the movable member 21 has just reversed. The force amplification effect of the clamping device is still near the maximum level, and the driving member 23 has a tendency to continue to swing upward. This prevents the movable member 21 from being driven to unlock due to the downward swing of the swinging member 23 caused by gravity. This helps the linkage structure to achieve natural locking, so that the movable member 21 is naturally kept in the clamping state.

[0057] The aforementioned bedside rail clamping device is designed as a linkage structure, which has a dead point position during its movement, thus naturally limiting the maximum clamping force and helping to avoid over-clamping, thereby improving the deformation of the rail caused by over-clamping. Furthermore, this linkage structure only requires driving the active member 23 to swing, which can be hand-operated without tools, making it convenient and facilitating quick clamping and release of the rail. Additionally, the linkage movement mode of each component can be adjusted by adjusting the lengths between the first connecting position 211 and the second connecting position 212, between the third connecting position 221 and the fourth connecting position 222, and between the fifth connecting position 231 and the sixth connecting position 232. This allows adjustment of the swing angle required by the active member 23 during the transition of the movable member 21 from the open state to the clamping state. This structure can control the swing angle of the active member 23 to below 45°, helping to reduce the operating space required during the operation of the bedside rail clamping device.

[0058] The above-mentioned bedside rail clamping device can adjust the transmission ratio from the drive unit 233 to the movable part 21 by adjusting the relative positional relationship between each connection position and adjusting the position of the clamping part 213. This helps to maintain a large transmission ratio and thus ensure a better force amplification effect. For example, this structure can make the clamping force F2 of the movable part 21 about 20 times the force F1 acting on the drive unit 233, that is, F2 = 20F1. Therefore, this clamping structure can also be applied to occasions where the clamping force requirement is high.

[0059] The aforementioned bedside rail clamping device uses a swing motion to switch between the open and clamping states. The swing motion of the movable part 21 prevents significant wear during frequent clamping, thus minimizing the impact on its clamping force over long-term use. This helps ensure a longer service life and a more stable clamping effect.

[0060] Please refer to Figures 1 to 4 As shown, the base assembly 10 includes a clamping seat 12 and a fixed seat 13. The second connecting position 212 and the third connecting position 221 are rotatably connected to the fixed seat 13. Therefore, the movable part 21, the intermediate part 22 and the active part 23 are actually connected to the fixed seat 13 to form a linkage structure. The above four components can be connected to form a linkage whole first, and then the fixed seat 13 is connected to the clamping seat 12 to facilitate the assembly of the linkage whole.

[0061] Furthermore, to facilitate the operation of the clamping mechanism 20 and prevent accidental activation, the active member 23 includes an active part 234 and a handle 235. The handle 235 serves as the driving part 233 for gripping to provide driving force. The fifth connecting position 231 and the sixth connecting position 232 are located on the active part 234, and the handle 235 rotates in conjunction with the active part 234. Figure 2 As shown, the active part 234 is generally L-shaped. The fifth connecting position 231 and the sixth connecting position 232 are located on one right-angled side of the active part 234. The handle 235 is rotatably mounted on the end of the other right-angled side of the active part 234. The handle 235 is connected to the end of the active part 234 via a damping adjustment screw 26. The damping adjustment screw 26 is also fitted with an elastic washer 27 and a disc spring 28. The elastic washer 27 is located between the handle 235 and the active part 234, and the disc spring 28 is located between the handle 235 and the head of the damping adjustment screw 26. This provides a certain damping force when the handle 235 rotates relative to the active part 234 to prevent slippage and avoid failure of the safety function. The disc spring 28 can compensate for a certain preload when the damping adjustment screw 26 becomes loose.

[0062] The rotation axis of the handle 235 is set at an angle to the rotation axis of the fifth connecting position 231. The angle of this angle is not specifically limited. The rotation axis of the handle 235 is not parallel to the rotation axes of the other connecting positions, so as to facilitate the swinging of the active part 234 via the handle 235. In this embodiment, it is preferable that the rotation axis of the handle 235 is perpendicular to the rotation axis of the fifth connecting position 231. Figure 2 As shown, the handle 235 can rotate relative to the active part 234 in a direction perpendicular to the paper plane, and the movable part 21, the intermediate part 22 and the active part 234 can swing in a direction parallel to the paper plane. Therefore, by holding the handle 235 and driving it to swing in a direction parallel to the paper plane, the active part 234 can be driven to swing in a direction parallel to the paper plane, thereby causing the movable part 21 and the intermediate part 22 to be linked.

[0063] This embodiment includes a handle 235, which facilitates the application of force by hand and the operation of the clamping mechanism 20. Furthermore, the handle 235 can be rotated relative to the active part 234 to adjust its position, allowing it to be in an unfolded or folded state. Specifically, during operation, the handle 235 is rotated out to form the unfolded state (i.e.,...). Figure 2 and Figure 3 (corresponding state), after clamping is complete, turn handle 235 to the folded state (i.e., Figure 4 (Corresponding state) to prevent accidental touches.

[0064] Please refer to Figures 1 to 4 As shown, a mounting groove 14 is provided on one side of the clamping seat 12. When the movable member 21 is in the clamping state, at least a portion of the movable member 21, the intermediate member 22 and the active member 23 are located in the mounting groove 14, and the clamping part 213 extends out of the mounting groove 14 through the opening of the mounting groove 14.

[0065] With the fixed base 13 fixed in the mounting groove 14, at least a portion of the movable part 21, the intermediate part 22, and the active part 234 are all installed in the mounting groove 14, and the handle 235 is located outside the mounting groove 14 for easy operation.

[0066] like Figure 1 As shown, when the movable part 21 is in the clamping state, most of the components of the clamping mechanism 20 are located in the mounting groove 14. The clamping part 213 is directly opposite the opening side of the mounting groove 14, and the protrusion 11 is located on one side of the opening of the mounting groove 14. After the clamping part 213 and the protrusion 11 cooperate to clamp the auxiliary rail, the auxiliary rail is blocked on the opening side of the mounting groove 14. Therefore, from an external perspective, the internal components of the overall clamping device are almost completely blocked.

[0067] In addition, a clearance notch 15 is provided on the side of the mounting groove 14 opposite to the protrusion 11. The clearance notch 15 is used to create clearance when the movable member 21, the intermediate member 22 and the active member 23 rotate.

[0068] like Figure 1 and Figure 2 As shown, the clamping base 12 is generally rectangular, with a mounting groove 14 located on its side. The mounting groove 14 is rectangular, and a protrusion 11 is located above the opening of the mounting groove 14. The protrusion 11 is also generally rectangular, with a clearance notch 15 located below the mounting groove 14. One end of the active part 234 extends downward through the clearance notch 15 to the outside of the mounting groove 14 and connects with the handle 235, ensuring that the handle 235 is always located outside the mounting groove 14 for easy operation. The clearance notch 15 is designed to prevent interference with the clamping base 12 during the interaction of the various components in the clamping mechanism 20.

[0069] Please combine Figure 1 and Figure 2 As shown, the clamping mechanism 20 further includes a locking block 24 and an elastic element 25. The locking block 24 is disposed on the clamping part 213 in a linearly movable manner. The movable element 21 includes a first movable part 214 and a second movable part 215 disposed at an angle. The angle between the first movable part 214 and the second movable part 215 can be adjusted based on the actual assembly structure. In this embodiment, the angle between the two is 90°. Both the first movable part 214 and the second movable part 215 are rectangular parallelepiped structures. The first connecting position 211 is approximately located at the intersection of the first movable part 214 and the second movable part 215. The second connecting position 212 is located at the end of the first movable part 214. An assembly groove 2141 is provided in the middle of the first movable part 214. The active part 234 of the active member 23 is located in the assembly groove. The first connecting position 211 is provided on the side wall of the assembly groove. The fifth connecting position 231 is located in the assembly groove 2141 along with the active part 234. The fifth connecting position 231 is rotatably engaged with the first connecting position 211 through a pivot to form a hinge structure.

[0070] The clamping part 213 is disposed on the second movable part 215, and the second movable part 215 has a mounting hole. The locking block 24 is generally rectangular and is installed in the mounting hole and can slide linearly along the mounting hole. Figure 2As shown, the elastic element 25 is disposed within the mounting hole to provide elastic force to the locking block 24 along its direction of movement. The elastic element 25 can be a cylindrical helical spring, a disc spring, or other elastic structures. The clamping end of the locking block 24 extends outside the mounting hole and is used to directly clamp the auxiliary rail 30 in cooperation with the protrusion 11 when the movable member 21 is in the clamping state. The clamping end of the locking block 24 is provided with a chamfered surface 241 for direct contact with the auxiliary rail 30 when clamping it. To ensure that the locking block 24 does not disengage from the mounting hole when sliding linearly along the mounting hole, a travel limiting structure can be adaptively provided to limit the sliding travel of the locking block 24. The travel limiting structure can be implemented, for example, by adding a locking block, a pin, or an elastic washer. The mounting structure of the locking block 24, the mounting method of the elastic element 25, and the travel limiting method all adopt existing technologies and will not be described in detail here.

[0071] The linear movement direction of the locking block 24 is configured such that when the movable member 21 is in the clamping state, the locking block 24 and the protrusion 11 form a clamping structure, and when the locking block 24 moves along its linear movement direction, it can move away from or closer to the protrusion 11. Since the movable member 21 can swing, when the movable member 21 swings to other states, the linear movement direction of the locking block 24 adapts to the swing of the movable block 21. Please refer to further details. Figure 1 As shown, with the movable member 21 in the clamping state as a reference, the locking block 24 and the protrusion 11 are vertically aligned to form a clamping structure. Therefore, the linear movement direction of the locking block 24 is vertical. In other alternative embodiments, when the movable member 21 is in the clamping state, the locking block 24 and the protrusion 11 can also be arranged vertically in other directions. In this case, the movement direction of the locking block 24 is adaptively consistent with the vertical alignment of the two, so that when the locking block 24 moves linearly relative to the clamping part 213, it can move away from or closer to the protrusion 11. The elastic member 25 is preferably in a compressed state, providing the locking block 24 with an elastic force that presses it against the auxiliary rail. Since the locking block 24 is provided with elastic force by the elastic element 25, it provides an automatic compensation function. Even when the locking block 24 experiences slight wear, it can still ensure a stable clamping force. By adjusting the elastic force of the elastic element 25 acting on the locking block 24, its compensation capability and clamping force can be adjusted. In addition, the setting of the elastic element 25 can also effectively prevent over-clamping, which is beneficial to protecting the auxiliary rail.

[0072] Please refer to Figure 3 and Figure 4As shown, the protrusion 11 has a clamping groove 111, which is rectangular and its shape is adapted to the shape of the wing plate of the auxiliary rail 30. The clamping groove 111 is used for inserting one side of the wing plate of the auxiliary rail 30. When the driving member 23 is in a clamping state, the locking block 24 is used to abut against the other side of the wing plate of the auxiliary rail 30. In this embodiment, the side of the wing plate of the auxiliary rail 30 has a chamfered structure, so the chamfered surface 241 of the locking block 24 fits against the chamfer of the auxiliary rail 30. The chamfered surface 241 provides horizontal and vertical forces to the auxiliary rail 30 to press one side of the wing plate of the auxiliary rail 30 into the clamping groove 111 to ensure a relatively stable clamping force.

[0073] In other alternative embodiments, the structure of the clamping end of the locking block 24 can also be adapted to the way it mates with the auxiliary rail 30.

[0074] Please continue to refer to this. Figure 3 and Figure 4 As shown, where Figure 3 Corresponding to the open state of movable part 21, Figure 4 The movable part 21 is in a clamping state. The movable part 21 is configured such that when it is in the clamping state, the movable part 21, the intermediate part 22, and the active part 234 do not interfere with the rotation path of the handle 235. This ensures that when the movable part 21 is in the clamping state, the handle 235 can rotate freely, and it can rotate to the unfolded state (corresponding to...). Figure 2 (as shown) or rotate to the folded state (corresponding to) Figure 4 (As shown in the figure) When the handle 235 is in the unfolded state, it is convenient for hand-held operation.

[0075] Please refer to Figure 4 As shown, in this embodiment, when the movable member 21 is in the clamping state and the handle 235 is rotated to the locking position, the handle 235 is parallel to the second movable part 215. The handle 235 is located below the clamping seat 12, so when the handle 235 is rotated, it can be rotated to the bottom of the clamping seat 12 to form a folded storage state.

[0076] Figure 4 The handle 235 is parallel to the second movable part 215, which also facilitates the formation of a mechanical interlocking relationship.

[0077] When the handle 235 rotates relative to the active part 234, it has a locked position. When the movable part 21 is in the clamping state and the handle 235 rotates to the locked position, the handle 235 and the movable part 21 form a mechanical interlock relationship to limit the movable part 21 from swinging to the open state.

[0078] The mechanical interlock relationship is configured such that when the movable part 21 swings toward the open state, the intermediate part 22, the active part 234 and the handle 235 work together to make the handle 235 swing toward the side closer to the movable part 21, so as to prevent the movable part 21 from continuing to swing toward the open state.

[0079] like Figure 4 As shown, the position corresponding to handle 235 at this time is the locked position. At this time, the movable member 21, the intermediate member 22, and the active part 234 are located between the base assembly 10 and the handle 235. Handle 235 and the second movable part 215 are parallel and form a mechanical interlock. If the active part 23 is driven to rotate by handle 235, thereby causing the movable member 21 to move to the open state, then handle 235 needs to swing towards the movable member 21. However, when the movable member 21 moves to the open state, it swings towards handle 235. Therefore, the movement paths of handle 235 and movable member 21 will interfere, thus preventing their movement in the corresponding directions. Therefore, in this state, handle 235 cannot drive the movable member 21 to move to the open state, ensuring that the clamping device remains in the clamping state. With this structure, on the one hand, the handle 235 can be swung to the bottom of the base assembly 10 to form a folded state, which helps to hide the handle 235 and prevents the handle 235 from being accidentally touched. On the other hand, in this state, the handle 235 and the movable part 21 form a mechanical interlock structure to ensure that the handle 235 cannot drive the movable part 21 to swing to the open state when in this state, thereby ensuring the stability of clamping.

[0080] In conclusion,

[0081] Example 2

[0082] The difference between Embodiment 2 and Embodiment 1 lies in the opening direction of the mounting groove 14 and the shape of the clamping groove 111.

[0083] like Figure 5 As shown, in this embodiment, the opening of the mounting groove 14 faces downward, so that no hole is needed on the outer surface; in addition, the clamping groove 111 has a chamfer to facilitate the horizontal positioning of the auxiliary rail.

[0084] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0085] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A clamping device for bedside rails, characterized in that, Includes a base assembly (10) and a clamping mechanism (20); The clamping mechanism (20) includes a movable part (21), an intermediate part (22) and an active part (23); The movable part (21) has a first connecting position (211), a second connecting position (212) and a clamping part (213). The middleware (22) has a third connection bit (221) and a fourth connection bit (222); The active component (23) has a fifth connection position (231) and a sixth connection position (232) as well as a drive unit (233). The first connecting position (211) is rotatably connected to the fifth connecting position (231), the second connecting position (212) is rotatably connected to the base assembly (10), the third connecting position (221) is rotatably connected to the base assembly (10), the fourth connecting position (222) is rotatably connected to the sixth connecting position (232), and the rotation axes of the above connecting positions are parallel. The drive unit (233) is used to drive the active member (23) to rotate and to link the movable member (21) and the intermediate member (22); The base assembly (10) has a protrusion (11); the movable member (21) has at least a clamping state and an open state when it moves with the active member (23); when the movable member (21) is in the clamping state, the clamping part (213) is close to the protrusion (11); when the movable member (21) is in the open state, the clamping part (213) is away from the protrusion (11). The active member (23) drives the movable member (21) to move towards the clamping state. When the clamping mechanism is infinitely close to the dead point position, the movable member (21) moves towards the protrusion (11) to the position closest to it. When the clamping mechanism passes the dead point position, the transmission direction between the active member (23) and the movable member (21) is reversed.

2. The clamping device for bedside rails as described in claim 1, characterized in that, The clamping mechanism (20) further includes a locking block (24) and an elastic element (25). The locking block (24) is movably disposed on the clamping part (213). The elastic element (25) provides elastic force to the locking block (24) along its direction of movement. When the movable part (21) is in the clamping state, the locking block (24) is used to cooperate with the protrusion (11) to clamp the auxiliary rail (30).

3. The clamping device for bedside rails as described in claim 2, characterized in that, The protrusion (11) has a clamping groove (111) for inserting one side of the wing plate of the auxiliary rail (30), and the locking block (24) is used to abut against the other side of the wing plate of the auxiliary rail (30).

4. The clamping device for bedside rails as described in claim 1, characterized in that, The active component (23) includes an active part (234) and a handle (235). The fifth connecting position (231) and the sixth connecting position (232) are located on the active part (234). The handle (235) is rotatably engaged with the active part (234). The rotation axis of the handle (235) is set at an angle to the rotation axis of the fifth connecting position (231).

5. The clamping device for bedside rails as described in claim 4, characterized in that, The rotation axis of the handle (235) is perpendicular to the rotation axis of the fifth connection position (231).

6. The clamping device for bedside rails as described in claim 4, characterized in that, The movable part (21) is configured such that when the movable part (21) is in the clamping state, the movable part (21), the intermediate part (22) and the active part (234) do not interfere with the rotation path of the handle (235).

7. The clamping device for bedside rails as described in claim 6, characterized in that, The handle (235) has a locking position when it rotates relative to the active part (234), and the handle (235) and the moving part (21) form a mechanical interlock relationship; The mechanical interlock relationship is configured such that when the movable part (21) swings toward the open state, the intermediate part (22), the active part (234) and the handle (235) work together to make the handle (235) swing toward the side closer to the movable part (21) to prevent the movable part (21) from continuing to swing toward the open state.

8. The clamping device for bedside rails as described in claim 7, characterized in that, When the handle (235) is rotated to the locked position, the movable part (21), the intermediate part (22) and the active part (234) are located between the base assembly (10) and the handle (235).

9. The clamping device for bedside rails as described in claim 7, characterized in that, The movable part (21) includes a first movable part (214) and a second movable part (215). The first movable part (214) and the second movable part (215) are arranged at an angle. The clamping part (213) is disposed on the second movable part (215). When the movable part (21) is in the clamping state and the handle (235) is rotated to the locking position, the handle (235) is parallel to the second movable part (215).

10. The clamping device for bedside rails as described in any one of claims 1-9, characterized in that, The base assembly (10) has a mounting groove (14) on one side. When the movable part (21) is in the clamping state, at least a portion of the movable part (21), the intermediate part (22) and the active part (23) are located in the mounting groove (14), and the clamping part (213) extends out of the mounting groove (14) through the opening of the mounting groove (14).

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