Rotary structure with locking function, rotary sliding composite assembly and handrail

Abstract

The application belongs to the technical field of automatic locking structure, and particularly relates to a rotating structure with a locking function, a rotating and sliding composite assembly and a handrail. The rotating structure comprises a slotted fixed shaft unit, a slotted hole composite rotating plate unit which is sleeved on the slotted fixed shaft unit, a reciprocating force storage member arranged on the slotted hole composite rotating plate unit, and a ring-shaped locking state plug-in block unit which is clamped on the slotted hole composite rotating plate unit, is driven by the reciprocating force storage member and is used for plugging in the slotted fixed shaft unit.

Description

Technical Field

[0001] This application belongs to the field of automatic locking structure technology, and particularly relates to a rotating structure with locking function, a rotating sliding composite component, and a handrail. Background Technology

[0002] A common rotating structure with locking function mainly consists of a fixed shaft, a rotating part, a locking groove, and a locking element. The fixed shaft and rotating part are always inserted together. Inserting the locking element into the locking groove corresponds to the locked state; removing the locking element from the locking groove releases the corresponding locked state.

[0003] On the other hand, one of the main directions of structural improvement in the more advanced and structurally improved rotating structure is to improve the dynamic operation of the locking component, so that it is less likely to spontaneously retract when inserted into the locking groove, and the specific operation of insertion and retraction is simpler and more convenient.

[0004] For example, Chinese utility model patent with authorization announcement number CN223009006U and authorization announcement date of June 24, 2025 discloses a lockable rotating shower chair. Its structure mainly includes a rotating locking component and a limiting hole. The former includes: a strip-shaped shell, a locking plate, a pin rod, a connecting ring, a return spring, a support ring, a sliding port, an arc-shaped locking block, a circular limiting plate, and a square limiting block.

[0005] The rotating locking component in this utility model patent has the following functions and advantages: the seat cushion rotating panel can be locked with the positioning metal tube by means of a pin, thereby preventing the seat cushion rotating panel from rotating excessively and reducing the probability of danger.

[0006] However, in actual use, this rotating locking component still has at least the following shortcomings in practicality, specifically including:

[0007] The operation of releasing the locking state of the pin rod and the limiting hole must be done manually, which is relatively inefficient and troublesome, and its practicality is relatively low. Utility Model Content

[0008] This application provides a rotating structure with a locking function. The technical problem it aims to solve is: how to make the rotating structure have sufficient stability in the locking state while also having obvious convenience in establishing and releasing the locking state.

[0009] In addition, this application also provides a rotary sliding composite component including the above-mentioned rotary structure and a handrail including the composite component.

[0010] The technical solution adopted by this application to solve the above problems is: a rotating structure with locking function, including a slotted fixed shaft unit, a slotted composite rotating plate unit sleeved on the slotted fixed shaft unit, a reciprocating force storage member disposed on the slotted composite rotating plate unit, and a circumferential locking plug-in block unit engaged on the slotted composite rotating plate unit, driven by the reciprocating force storage member, and used for plugging into the slotted fixed shaft unit.

[0011] A further preferred technical solution is that: the slotted fixed shaft unit includes a base plate with the slotted composite rotating plate unit on its upper surface, a fixed shaft disposed on the base plate and used to insert the slotted composite rotating plate unit, an upper limiting block disposed on the fixed shaft and used to block the slotted composite rotating plate unit, and a plurality of locking slots disposed on the upper limiting block and selectively inserted by the circumferential locking plug-in block unit.

[0012] A further preferred technical solution is that the grooved fixed shaft unit further includes a radial protrusion plate for preventing falling, which is disposed on the upper limiting block and located above the circumferential locking plug block unit.

[0013] A further preferred technical solution is that the slotted composite rotating plate unit includes a rotating movable plate disposed on the upper surface of the base plate, a countersunk hole disposed on the rotating movable plate and sleeved with the fixed shaft and used to receive the blocking effect of the upper limiting block, and a locking slot disposed on the upper surface of the rotating movable plate and communicating with the countersunk hole and used to install the reciprocating energy storage component and the circumferential locking plug-in block unit.

[0014] A further preferred technical solution is that: the reciprocating energy storage component is a permanent magnet, which is located at one end of the locking slot away from the countersunk hole; the circumferential locking plug-in block unit includes a movable permanent magnet that magnetically repels the reciprocating energy storage component.

[0015] A further preferred technical solution is that: the circumferential locking plug-in block unit includes a circumferential limiting block disposed in the locking slot and used for plugging into the locking slot; the reciprocating force storage component is a lifting spring, with its two ends respectively abutting against the end faces of the circumferential limiting block and the locking slot.

[0016] A further preferred technical solution is that the slotted composite rotating plate unit further includes a power storage clamping operation hole disposed on the lower surface of the rotating movable plate, communicating with the locking slot, and used for installing the reciprocating power storage component.

[0017] A rotary sliding composite assembly including the aforementioned rotary structure with locking function, the structure further includes a cylinder disposed between the base plate and the fixed shaft, a slotted composite sliding plate unit sleeved on the cylinder, and a side protrusion disposed on the rotary movable plate for inserting the slotted composite sliding plate unit.

[0018] A further preferred technical solution is that the slotted composite sliding plate unit includes a sliding bottom shell disposed between the base plate and the rotating movable plate, a rectangular opening disposed on the sliding bottom shell for passing through the cylinder, and a sliding dynamic locking groove disposed on the inner side surface of the sliding bottom shell for engaging the side protrusion.

[0019] A handrail including the aforementioned rotating sliding composite component, the structure further including a handrail panel disposed on the sliding base shell, and a handrail contact housing disposed on the base plate.

[0020] The beneficial effects of this application include at least the following seven points.

[0021] First, in this rotating structure, the reciprocating energy storage component can actively trigger the insertion and locking effect of the circumferential locking state plug-in block unit, and can also be compressed by the slotted composite rotating plate unit, causing the circumferential locking state plug-in block unit to retract and the locking state to be released. Therefore, under the premise of relatively sufficient stability of the locking state, it also has obvious convenience in establishing and releasing the locking state, corresponding to sufficient and appropriate automatic locking and automatic unlocking functions.

[0022] Secondly, the radial protruding plate in the slotted fixed shaft unit can not only block the circumferential locking plug block unit and prevent it from falling upwards, otherwise the locking function will fail, but also fit appropriately against the upper surface of the rotating movable plate, so that the rotation of the slotted composite rotating plate unit is more stable, avoiding unnecessary vertical loosening, and can also provide appropriate damping.

[0023] Third, the slotted composite rotating plate unit has sufficient vertical stability, avoids significant vertical loosening, and adjustable circumferential locking strength. For example, the effective number of slots used for locking and the energy storage strength of the reciprocating energy storage component are adjustable, thus making the circumferential locking strength flexible and adjustable.

[0024] Fourth, the reciprocating energy storage component can be either a permanent magnet or a lifting spring, thereby improving the practicality of the rotating structure.

[0025] Fifth, for the aforementioned permanent magnets and lifting springs, the operating holes for clamping the accumulators can make the installation of both simpler and more efficient. Otherwise, due to the relatively small width of the locking slot, the installation of the reciprocating accumulators would be relatively troublesome.

[0026] Sixth, in this rotary-sliding composite component, the slotted composite sliding plate unit can both rotate with the rotary structure and slide relative to the rotary structure, and the sliding effect still has a locking function, thus enabling the combined function of rotation and sliding to be effectively implemented. At the same time, the slotted composite sliding plate unit still has sufficient vertical stability.

[0027] Seventh, the combined rotation and sliding functions of the handrail do not conflict with the rotation around the mounting axis and overall telescopic function provided by the handrail's outer casing. They can be used together to ultimately improve the handrail's practicality and comfort. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the location of the slotted composite rotating plate unit in this application.

[0029] Figure 2 This is a structural schematic diagram of the slotted fixed shaft unit in this application.

[0030] Figure 3 This is a schematic diagram of the slotted composite rotating plate unit in this application.

[0031] Figure 4 This is a schematic diagram showing the position and shape of the operating hole for clamping the energy storage component in this application.

[0032] Figure 5 This is a schematic diagram of the positional structure of the slotted composite sliding plate unit in this application.

[0033] Figure 6 This is a schematic diagram showing the position and shape of the outer casing for the armrest connection in this application.

[0034] Figure 7 This is a schematic diagram showing the position and shape of the circumferential locking block and locking groove in this application.

[0035] The meanings of the markings in the diagram are as follows.

[0036] 1. Grooved fixed shaft unit; 2. Grooved composite rotating plate unit; 3. Reciprocating power storage component; 4. Circumferential locking plug-in block unit.

[0037] Base plate 101, fixed shaft 102, upper limit block 103, locking groove 104, radial protrusion plate for preventing falling 105, circumferential locking block 106, locking groove 107;

[0038] Rotating movable plate 201, countersunk hole 202, locking slot 203, operating hole for clamping the power storage component 204;

[0039] Movable permanent magnet 401, circumferential limiting block 402;

[0040] 5. Cylindrical component; 6. Slotted composite sliding plate unit; 7. Side protrusion block;

[0041] Sliding base 601, rectangular opening 602, sliding dynamic locking groove 603;

[0042] 8. Handle gloves use outer shell. Detailed Implementation

[0043] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0044] like Figures 1-7 As shown, a rotating structure with locking function includes a grooved fixed shaft unit 1, a slotted composite rotating plate unit 2 sleeved on the grooved fixed shaft unit 1, a reciprocating energy storage member 3 disposed on the slotted composite rotating plate unit 2, and a circumferential locking plug-in block unit 4 engaged on the slotted composite rotating plate unit 2, driven by the reciprocating energy storage member 3, and used for plugging into the grooved fixed shaft unit 1.

[0045] In this embodiment, the main material of the rotating structure is any one of glass fiber reinforced PP, PC / ABS alloy, or glass fiber reinforced nylon.

[0046] Specifically, the rotating structure includes, for example, one slotted fixed shaft unit 1, one slotted composite rotating plate unit 2, two reciprocating power storage components 3, and two circumferentially locking plug-in block units 4. The upper and lower surfaces of the slotted composite rotating plate unit 2 are blocked and limited by the slotted fixed shaft unit 1, thereby providing the slotted composite rotating plate unit 2 with a structural basis for stable lateral rotation.

[0047] Furthermore, the "groove" in the grooved fixed shaft unit 1 refers to the locking groove. When the circumferential locking plug-in block unit 4 is inserted into it, the slotted composite rotating plate unit 2 achieves a locking effect. When the user rotates the slotted composite rotating plate unit 2 with relatively large force, the locking effect can be forcibly released, thus ultimately enabling the rotating structure to possess both stability in the locked state and ease of establishing and releasing the locked state, corresponding to the automatic locking function.

[0048] Correspondingly, the key points of the above-mentioned automatic locking function, and the directions for further functional optimization, mainly include: the effective insertion size between the circumferential locking plug-in block unit 4 and the locking groove, the material parameters such as hardness and friction coefficient of the circumferential locking plug-in block unit 4 and the locking groove, the energy storage strength of the reciprocating energy storage component 3, and the specific shapes of the circumferential locking plug-in block unit 4 and the locking groove.

[0049] The slotted fixed shaft unit 1 includes a base plate 101 with the slotted composite rotating plate unit 2 on its upper surface, a fixed shaft 102 disposed on the base plate 101 and used to insert the slotted composite rotating plate unit 2, an upper limiting block 103 disposed on the fixed shaft 102 and used to block the slotted composite rotating plate unit 2, and a plurality of locking slots 104 disposed on the upper limiting block 103 and selectively inserted by the circumferential locking plug-in block unit 4.

[0050] In this embodiment, two of the installation methods of the slotted fixed shaft unit 1 are: the fixed shaft 102 and the upper limiting block 103 are connected later, or the fixed shaft 102 and the base plate 101 are connected later, thereby enabling the slotted composite rotating plate unit 2 to be properly assembled and disassembled.

[0051] Meanwhile, relative rotation between the base plate 101 and the upper limiting block 103 must be avoided. The implementation method can be found in the appendix. Figure 7 However, they are not entirely consistent, namely:

[0052] A circumferential engaging block 106 is provided on the upper end face of the fixed shaft 102, and an engaging groove 107 is provided on the lower surface of the upper limiting block 103. First, the circumferential engaging block 106 and the engaging groove 107 are engaged, and then the fixed shaft 102 and the upper limiting block 103 are screwed together. The circumferential engaging block 106 and the engaging groove 107 have the same shape, such as being triangular, square, or cross-shaped.

[0053] The fixed shaft 102 and the upper limiting block 103 are both cylindrical. The locking groove 104 is an arc-shaped slot and is provided on the annular surface of the upper limiting block 103.

[0054] The grooved fixed shaft unit 1 also includes a radial protrusion 105 for preventing falling, which is disposed on the upper limiting block 103 and located above the circumferential locking plug block unit 4.

[0055] In this embodiment, the radial protrusion 105 for preventing falling is circular in shape and has a central hole for mounting bolts, thereby indirectly connecting the upper limiting block 103 and the bottom plate 101.

[0056] In addition, as attached Figure 1 As shown, the basic function of the radial protrusion plate 105 for preventing falling is to fit against and block the upper surface of the circumferential locking plug block unit 4, so as to prevent the circumferential locking plug block unit 4 from falling upwards unnecessarily.

[0057] To improve the stability of the locking state of the circumferential locking plug block unit 4, its optimal movement mode is linear reciprocating sliding.

[0058] The secondary function of the radial protrusion 105 for preventing falls is, together with the upper limiting block 103, to prevent the slotted composite rotating plate unit 2 from shifting significantly upwards. In this case, the diameter of the radial protrusion 105 for preventing falls needs to be relatively large.

[0059] The slotted composite rotating plate unit 2 includes a rotating movable plate 201 disposed on the upper surface of the base plate 101, a countersunk hole 202 disposed on the rotating movable plate 201 and sleeved with the fixed shaft 102 and used to receive the blocking effect of the upper limiting block 103, and a locking slot 203 disposed on the upper surface of the rotating movable plate 201 and communicating with the countersunk hole 202 and used to install the reciprocating energy storage member 3 and the circumferential locking plug-in block unit 4.

[0060] In this embodiment, the base plate 101 and the rotating movable plate 201 are generally rectangular in shape. The countersunk hole 202 is a circular countersunk hole with two annular surfaces, one above the other. The main function of the upper annular surface is not to obstruct or affect the rotation of the upper limiting block 103, and the main function of the lower annular surface is to fully and appropriately fit the fixed shaft 102.

[0061] Similarly, the upper limiting block 103 also fully and appropriately presses down the annular bottom surface of the countersunk hole 202.

[0062] At this point, the height of the locking slot 203 is aligned with the locking groove 104. Generally, by reasonably setting the radial depth of the locking groove 104 and the force storage intensity of the reciprocating force storage member 3, the rotating structure can have the following two characteristics: sufficient stability of the locking state and convenience of establishing and canceling the locking state.

[0063] The above two usage characteristics combined mean that the resistance encountered by the user when manually rotating the slotted composite rotating plate unit 2 is appropriate.

[0064] Specifically, the number of locking slots 203 is 2-4, and their shape is rectangular.

[0065] The reciprocating energy storage component 3 is a permanent magnet, which is located at one end of the locking slot 203 away from the countersunk hole 202; the circumferential locking plug block unit 4 includes a movable permanent magnet 401 that is magnetically repelled by the reciprocating energy storage component 3.

[0066] In this embodiment, one of the principles behind the automatic locking of the rotating structure is the repulsive magnetic force between the permanent magnet and the movable permanent magnet 401. Correspondingly, the greater the repulsive magnetic force, the greater the resistance encountered by the user when manually rotating the slotted composite rotating plate unit 2.

[0067] At this time, a plug-in block is provided on the side of the movable permanent magnet 401 facing away from the reciprocating energy storage component 3. The plug-in block is generally rectangular in shape, with its width slightly smaller than the width of the locking slot 203, and its vertical dimension, i.e., its thickness, is also slightly smaller than the depth of the locking slot 203. For example, the above-mentioned "slightly smaller" means that the size is 4-8mm smaller, which makes the reciprocating movement of the plug-in block more stable and closer to linear sliding.

[0068] The circumferential locking plug-in block unit 4 includes a circumferential limiting block 402 disposed in the locking slot 203 and used to plug into the locking slot 104; the reciprocating energy storage member 3 is a lifting spring, with its two ends abutting against the end faces of the circumferential limiting block 402 and the locking slot 203, respectively.

[0069] In this embodiment, the second principle by which the rotating structure achieves automatic locking is by relying on the elastic force of the lifting spring.

[0070] Correspondingly, the greater the elastic force, the greater the resistance encountered by the user when manually rotating the slotted composite rotating plate unit 2. The two ends of the lifting spring respectively abut against or hook onto the non-insertion end face of the circumferential limiting block 402 and the only end face of the locking slot 203.

[0071] Furthermore, the insertion end face of the circumferential limiting block 402 is designed to be arc-shaped or spherical, making its insertion and sliding action in the locking groove 104 more stable. For details, please refer to the attached document. Figure 3 .

[0072] The slotted composite rotating plate unit 2 further includes a power storage clamping operation hole 204 disposed on the lower surface of the rotating movable plate 201, communicating with the locking slot 203, and used for installing the reciprocating power storage component 3.

[0073] In this embodiment, the locking slot 203 needs to engage with the circumferential limiting block 402 from both sides, so its width needs to be relatively small. Consequently, whether installing a lifting spring or a permanent magnet inside, there is a problem that the installation space required is relatively small.

[0074] The direct function of the operating hole 204 for clamping the energy storage component is to allow the installer's fingers, or tools such as tweezers, to clamp and lift the spring or permanent magnet from top to bottom, thereby achieving precise positioning within the locking slot 203 for subsequent connection operations.

[0075] Otherwise, taking fingers as an example, it would be rather troublesome to simultaneously insert a lifting spring or a permanent magnet within the width of the locking slot 203, as well as to require two fingers to pinch one of the two.

[0076] Specifically, when the reciprocating energy storage component 3 is a permanent magnet, it is generally bonded and fixed; when the reciprocating energy storage component 3 is a lifting spring, a hook or buckle can be provided on the end face of the locking slot 203 to engage and connect the lifting spring.

[0077] A rotary sliding composite assembly including the aforementioned rotating structure with locking function, the structure further includes a cylinder 5 disposed between the base plate 101 and the fixed shaft 102, a slotted composite sliding plate unit 6 sleeved on the cylinder 5, and a side protrusion 7 disposed on the rotary movable plate 201 and used for inserting the slotted composite sliding plate unit 6.

[0078] In this embodiment, the slotted composite sliding plate unit 6 is located vertically between the fixed shaft 102 and the base plate 101. Therefore, the cylinder 5 serves the following two functions:

[0079] First, it indirectly connects the base plate 101 and the upper limiting block 103 to ensure the effectiveness of the rotation function of the slotted composite rotating plate unit 2;

[0080] Secondly, the slotted composite sliding plate unit 6 is inserted into a limiting position rather than being fixedly inserted, allowing it to rotate together with the slotted composite rotating plate unit 2, and it can also slide independently relative to the slotted composite rotating plate unit 2.

[0081] Therefore, at this time, the aforementioned circumferential locking block 106 and locking groove 107 need to be set between the cylinder 5 and the fixed shaft 102, and the fixed shaft 102 then limits the upper position of the slotted composite sliding plate unit 6, as detailed in the attached figure. Figure 7 As shown.

[0082] In addition, the side protrusion 7 can be a fixed protrusion made of elastic rubber, or a reciprocating sliding protrusion that uses magnetic repulsion, or a reciprocating sliding protrusion that uses elastic lifting.

[0083] The above-mentioned "repulsive magnetic force method" can be found in the appendix. Figure 4The working principle of the side protrusion 7 is the same as the combined use of the movable permanent magnet 401, the circumferential limiting block 402 and the permanent magnet, and can also achieve an automatic locking effect between the side protrusion 7 and the slotted composite sliding plate unit 6.

[0084] The slotted composite sliding plate unit 6 includes a sliding bottom shell 601 disposed between the bottom plate 101 and the rotating movable plate 201, a rectangular opening 602 disposed on the sliding bottom shell 601 for passing through the cylinder 5, and a sliding dynamic locking groove 603 disposed on the inner side surface of the sliding bottom shell 601 for engaging the side protrusion 7.

[0085] In this embodiment, the rectangular opening 602 allows the cylinder 5 to rotate relative to each other within it and allows the cylinder 5 to slide relative to each other along its length, but prevents the cylinder 5 from sliding relative to each other along its width. Therefore, the slotted composite sliding plate unit 6 has the dual function of rotating with the slotted composite rotating plate unit 2 and sliding independently relative to the slotted composite rotating plate unit 2.

[0086] In addition, the slotted composite sliding plate unit 6 also includes an inwardly recessed side plate with the sliding dynamic locking groove 603, as detailed in the appendix. Figure 5 This allows the side protrusion 7 to extend only slightly in order to achieve a sufficient locking effect.

[0087] A handrail including the aforementioned rotating sliding composite component, the structure further includes a handrail panel disposed on the sliding base 601, and a handrail connecting housing 8 disposed on the base plate 101.

[0088] In this embodiment, the base plate 101 and the armrest sleeve are screwed together with the outer shell 8, and the armrest sleeve shell 8 is then sleeved and screwed together with the armrest body on the seat plate, so that the entire armrest can have at least the following four functions:

[0089] It can swing back and forth, rise and fall along the length of the main body of the handrail, rotate the handrail panel laterally without angular restrictions, and slide the handrail panel back and forth.

[0090] The armrest panel is fastened to the sliding base shell 601, and the main material is leather, TPU, or PP.

[0091] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A rotating structure with a locking function, characterized in that: It includes a slotted fixed shaft unit (1), a slotted composite rotating plate unit (2) sleeved on the slotted fixed shaft unit (1), a reciprocating energy storage component (3) disposed on the slotted composite rotating plate unit (2), and a circumferential locking plug-in block unit (4) engaged on the slotted composite rotating plate unit (2), driven by the reciprocating energy storage component (3), and used to plug into the slotted fixed shaft unit (1).

2. The rotating structure with locking function according to claim 1, characterized in that: The slotted fixed shaft unit (1) includes a base plate (101) with the slotted composite rotating plate unit (2) having the slotted hole on its upper surface, a fixed shaft (102) disposed on the base plate (101) and used to insert the slotted composite rotating plate unit (2), an upper limiting block (103) disposed on the fixed shaft (102) and used to block the slotted composite rotating plate unit (2), and a plurality of locking slots (104) disposed on the upper limiting block (103) and selectively inserted by the circumferential locking plug-in block unit (4).

3. A rotating structure with locking function according to claim 2, characterized in that: The grooved fixed shaft unit (1) also includes a radial protrusion plate (105) for preventing falling, which is disposed on the upper limiting block (103) and located above the circumferential locking plug block unit (4).

4. A rotating structure with locking function according to claim 2, characterized in that: The slotted composite rotating plate unit (2) includes a rotating movable plate (201) disposed on the upper surface of the base plate (101), a countersunk hole (202) disposed on the rotating movable plate (201) and sleeved with the fixed shaft (102) and used to receive the blocking effect of the upper limiting block (103), and a locking slot (203) disposed on the upper surface of the rotating movable plate (201) and communicating with the countersunk hole (202) and used to install the reciprocating energy storage member (3) and the circumferential locking plug-in block unit (4).

5. A rotating structure with locking function according to claim 4, characterized in that: The reciprocating energy storage component (3) is a permanent magnet and is located at one end of the locking slot (203) away from the countersunk hole (202); the circumferential locking plug unit (4) includes a movable permanent magnet (401) that is magnetically repelled by the reciprocating energy storage component (3).

6. A rotating structure with locking function according to claim 4, characterized in that: The circumferential locking plug-in block unit (4) includes a circumferential limiting block (402) disposed in the locking slot (203) and used to plug into the locking slot (104); the reciprocating energy storage member (3) is a lifting spring, with its two ends abutting against the end faces of the circumferential limiting block (402) and the locking slot (203) respectively.

7. A rotating structure with locking function according to claim 4, characterized in that: The slotted composite rotating plate unit (2) further includes a power storage clamping operation hole (204) disposed on the lower surface of the rotating movable plate (201), communicating with the locking slot (203), and used for installing the reciprocating power storage component (3).

8. A rotary sliding composite component comprising a rotary structure with locking function as described in any one of claims 4-7, characterized in that: The structure also includes a cylinder (5) disposed between the base plate (101) and the fixed shaft (102), a slotted composite sliding plate unit (6) sleeved on the cylinder (5), and a side protrusion (7) disposed on the rotating movable plate (201) and used to insert the slotted composite sliding plate unit (6).

9. A rotary sliding composite component including a rotary structure with locking function according to claim 8, characterized in that: The slotted composite sliding plate unit (6) includes a sliding bottom shell (601) disposed between the bottom plate (101) and the rotating movable plate (201), a rectangular opening (602) disposed on the sliding bottom shell (601) for passing through the cylinder (5), and a sliding dynamic locking groove (603) disposed on the inner side of the sliding bottom shell (601) for engaging the side protrusion (7).

10. A handrail comprising a rotary sliding composite assembly including a rotary structure with locking function as described in claim 9, characterized in that: The structure also includes an armrest panel disposed on the sliding base (601) and an armrest connection housing (8) disposed on the base plate (101).

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